Methods for wireless communication, wireless communication devices, and computer-readable memory

专利摘要:
RANDOM ACCESS DESIGN IN A MULTI-COMPONENT CARRIER COMMUNICATION NETWORK. The following are provided: user equipment, systems, equipment, methods and/or computer program products to facilitate random access procedures in a wireless communication network. The selection and use of uplink and downlink component carriers to conduct contention-based and contention-free random access procedures are facilitated in a multiple component carrier system, where a user equipment is configured with multiple component carriers of uplink and downlink. This Summary is provided for the sole purpose of complying with Summary requirement rules that allow a reader to quickly ascertain the revealed subject matter. Therefore, it should be understood that the same should not be used to interpret or limit the scope of meaning of the claims.
公开号:BR112012023555B1
申请号:R112012023555-9
申请日:2011-03-17
公开日:2022-02-01
发明作者:Jelena M. Damnjanovic；Peter Gaal；Rajat Prakash；Aleksandar Damnjanovic
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

Field of Invention
[0001] The present application relates generally to the field of wireless communications and, more specifically, to the facilitation of random access procedures in wireless communication systems. Fundamentals
[0002] This section is intended to provide a basis or context for the described modalities. The present description may include concepts that would be adopted, but are not necessarily those that were previously conceived or adopted. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art upon inclusion in this section.
[0003] Wireless communication systems are widely used to provide various types of communication content such as voice, data, and other content. These systems may be multiple access systems capable of supporting communication with multiple users by sharing available system resources (eg, bandwidth and transmission capacity). Examples of such multiple access systems include code division multiple access (CDMA) systems; time division multiple access (TDMA) systems; frequency division multiple access (FDMA) systems; Long Term Evolution (LTE) systems (including 3GPP systems) and orthogonal frequency division multiple access (OFDMA) systems.
[0004] Generally, a wireless multiple access communication system can simultaneously support communication to multiple wireless access terminals. Each terminal, or user equipment (EU), communicates with one or more base stations via forward and reverse links. The forward link (or downlink) refers to the communication link from the base stations to the terminals, and the reverse link (or uplink) refers to the communication link from the terminals to the base stations. This communication link can be established through a single-input, single-output, multiple-input, single-output system, or a multiple-input, multiple-output (MIMO) system.
[0005] In some wireless communication systems, such as LTE system, a random access procedure is used to establish or re-establish a connection between a user equipment and a base station (or eNodeB). A random access procedure can serve a few purposes, such as random access when establishing a radio link (e.g. moving from an RRC_IDLE state to an RRC_CONNECTED state), to reestablish a radio link from a radio link failure, to establishing uplink synchronization for a user equipment which has lost or not acquired uplink synchronization, to facilitate handover operations when a new synchronization with a new cell needs to be established, and the like. summary
[0006] This section is intended to provide a summary of certain exemplary modalities and is not intended to limit the scope of the modalities described.
[0007] The present description refers to the systems, methods, equipment and computer program products that facilitate contention-based and contention-free random access procedures in component multi-carrier wireless communication networks. An exemplary aspect relates to a method for wireless communication which comprises receiving a request for a procedure and random access on a user equipment. User equipment may be configured to operate with a plurality of component carriers including uplink and downlink component carriers in a wireless communication network. According to this exemplary method, which may be used as part of a dispute-free random access procedure via user equipment, the request is received on a first downlink component carrier from among the plurality of component carriers. The method further includes selecting an uplink component carrier from among the plurality of component carriers to transmit a random access message based on an association between the uplink and downlink component carriers. The method may also include transmitting the random access message on the selected uplink component carrier, and receiving a response to the transmitted random access message.
[0008] In one aspect of the description, the selected uplink component carrier is associated with the first downlink component carrier in accordance with signaling system information block 2 (SIB2). In another aspect, the selected uplink component carrier is associated with the first downlink component carrier in accordance with a specific user equipment signaling that links the selected first uplink component carrier with the selected uplink component carrier. The plurality of component carriers may include a primary component carrier and one or more secondary component carriers, and the selected uplink component carrier may be the primary uplink component carrier.
[0009] In one aspect, the plurality of component carriers includes a primary uplink component carrier and one or more secondary uplink component carriers, and the first downlink component carrier is associated with the primary uplink component carrier. In another aspect, the plurality of component carriers includes a primary uplink component carrier and one or more secondary uplink component carriers, and the selected uplink component carrier is a secondary uplink component carrier. The user equipment may select a secondary uplink component carrier with an uplink timing anticipation value that is substantially the same as the uplink timing advance value associated with the primary uplink component carrier. In another example, the user equipment may select a secondary uplink component carrier with an uplink timing advance value different from the uplink timing advance value relative to the uplink timing advance value of the carrier. main uplink component to acquire uplink synchronization for the main uplink component carrier to enable proper transmissions of uplink control information.
[00010] In one aspect, the request that is received at the user equipment includes information regarding the association between the first downlink component carrier and an indicated uplink component carrier, and the indicated uplink component carrier is selected as the uplink component carrier. In one example, the response to the transmitted random access message is received on a second downlink component carrier that is coupled to the indicated uplink component carrier in accordance with the signaling system information block 2 (SIB2). In another example, the response to the transmitted random access message is received on the first downlink component carrier. In yet another example, the response received is a scrambled response, and the user equipment unscrambles the response according to a special signature sequence number or a reserved random access radio network temporary identifier (RA-RNTI) to ascertain a specific uplink component carrier.
[00011] Another aspect relates to a method for wireless communication that includes configuring the plurality of component carriers for use by a user equipment in a wireless communication network. The plurality of component carriers may include uplink and downlink component carriers. This method can be used as part of a dispute-free random access procedure by an eNodeB of the wireless communication network where each uplink component carrier is associated with at least one downlink component carrier. The method further includes selecting a downlink component carrier and transmitting a request for a random access procedure to user equipment on the selected downlink component carrier, receiving a random access message from the user equipment on a downlink component carrier uplink from among the plurality of component carriers, where the uplink component carrier is identified by the user equipment, and transmit a response to the user equipment.
[00012] In another aspect, the plurality of component carriers includes a primary component carrier and one or more secondary component carriers, the selected downlink component carrier is the primary downlink component carrier, and the random access message is received on the main uplink component carrier.
[00013] Another aspect refers to a user equipment that comprises a processor, and a memory that stores the executable code per processor. Processor executable code, when executed by the processor, configures the user equipment to receive a request for a random access procedure when the user equipment is configured to operate on a plurality of component carriers that include uplink and downlink component carriers. downlink of a wireless communication network. The request may be received on a first downlink component carrier from among the plurality of component carriers. The processor-executable code may also configure the user equipment to select an uplink component carrier from among the plurality of component carriers to transmit a random access message based on an association between the uplink and downlink component carriers, transmit the random access message on the selected uplink component carrier, and receive a response to the transmitted random access message.
[00014] Another aspect refers to a device that comprises a processor and a memory that stores executable code per processor. Per-processor executable code, when executed by the processor, causes the device to configure multiple component carriers for use by user equipment on a wireless communication network. The various component carriers may include uplink and downlink component carriers for which each uplink component carrier is associated with at least one downlink component carrier. Processor executable code, when executed by the processor, configures the device to select a downlink component carrier and transmits a request for random access procedure to user equipment on the selected downlink component carrier. Processor executable code, when executed by the processor, enables the device to receive a random access message from user equipment on an uplink component carrier of the various component carriers, where the uplink component carrier is identified by the uplink component carrier. user, and to transmit a response to the user equipment.
[00015] Another aspect relates to a device that includes means for receiving a request for a random access procedure on a user equipment, where the user equipment is configured to operate with multiple component carriers comprising uplink and downlink component carriers. downlink of a wireless communication network, and where the request is received on a first downlink component carrier of the multiple component carriers. The device also includes means for selecting an uplink component carrier to transmit a random access message based on an association between the uplink and downlink component carriers. The device also includes means for transmitting the random access message on the selected uplink component carrier; and means for receiving a response to the transmitted random access message.
[00016] Another aspect relates to a device that includes means that configure multiple component carriers for use by user equipment in a wireless communication network, where the multiple component carriers include uplink and downlink component carriers and wherein each uplink component carrier is associated with at least one downlink component carrier. The device also includes means for selecting a downlink component carrier and means for transmitting a request for a random access procedure to user equipment on the selected downlink component carrier. The device may include means for receiving a random access message from user equipment on an uplink component carrier of the various component carriers; where the uplink component carrier is identified by the user equipment; and also means for transmitting a response to the user equipment.
[00017] Another aspect refers to a computer program product, embedded in a non-transient computer-readable medium, that includes program code to receive a request for a random access procedure on a user equipment, where the The user is configured to operate with a plurality of component carriers including uplink and downlink component carriers of a wireless communication network, and where the request is received on a first downlink component carrier of the various component carriers. The computer program product also includes program code for selecting an uplink component carrier from among the various component carriers to transmit a random access message based on an association between the uplink and downlink component carriers, and code program to transmit the random access message on the selected uplink component carrier. The computer program product further includes program code for receiving a response to the transmitted random access message.
[00018] Another aspect refers to a computer program product, embedded in a non-transient computer-readable medium, which includes program code for configuring various component carriers for use by a user equipment in a wireless communication network, wherein the various component carriers comprise uplink and downlink component carriers and wherein each uplink component carrier is associated with at least one downlink component carrier. The computer program product also includes program code for selecting a downlink component carrier and program code for transmitting a request for a random access procedure to user equipment on the selected downlink component carrier. The computer program product further includes program code for receiving a random access message from the user equipment on an uplink component carrier of the various component carriers, wherein the uplink component carrier is identified by the user equipment, and program code for transmitting a response to the user equipment.
[00019] Another aspect relates to a method for wireless communication that includes selecting an uplink component carrier to transmit a random access request through a user equipment in a wireless communication network, where the user equipment is configured to operate with multiple component carriers comprising uplink and downlink component carriers. The method, which may be used as part of a contention-based random access procedure by a user equipment, further includes transmitting the random access request on the selected uplink component carrier, and receiving a response to the access request. random on a first downlink component carrier in the multiple component carriers, where the first downlink component carrier is linked to the selected uplink component carrier.
[00020] In one aspect, user equipment is configured to use a random access channel on the selected uplink component carrier. In another aspect, as part of the selection of the uplink component carrier, the user equipment identifies the first downlink component carrier from an active subset of the various component carriers configured for use by the user equipment. The first downlink component carrier may be coupled to the selected uplink component carrier in accordance with signaling system information block 2 (SIB2) or, the first downlink component carrier may be coupled to the selected uplink component carrier according to a user-specific equipment signaling. In the scenario where user-specific equipment signaling is used, the user equipment can identify the first downlink component carrier according to random access channel (RACH) resources selected from a group including: a temporal resource, a frequency resource, and a subscription space resource.
[00021] In one aspect, the various component carriers may include a primary component carrier and one or more secondary component carriers, the selected uplink component carrier is the primary uplink component carrier, and the first uplink component carrier downlink is the main downlink component carrier. In another embodiment, the multiple component carriers include a primary component carrier and one or more secondary component carriers, the selected uplink component carrier is the primary uplink component carrier, and the first downlink component carrier is a downlink component carrier. secondary downlink.
[00022] In another aspect, the various component carriers may include a primary component carrier and one or more secondary component carriers, and the user equipment selects a secondary uplink component carrier with substantially the same uplink timing advance value than the component carrier and main uplink. In the scenario where the first downlink component carrier is a secondary downlink component carrier, the user equipment can acquire uplink synchronization for each secondary uplink component carrier within an active subset of the various component carriers configured for use by the user equipment when the uplink timing advance value associated with each secondary uplink component carrier is different from the uplink timing advance value associated with the primary uplink component carrier. User equipment may also acquire uplink synchronization for one or more secondary uplink component carriers within the active subset when the uplink timing advance value associated with one or more secondary uplink component carriers is different from the value uplink timing advance associated with the primary uplink component carrier, wherein the one or more secondary uplink component carriers are identified by an entity in the wireless network other than the user equipment.
[00023] In another aspect, the various component carriers may include a primary component carrier and one or more secondary component carriers, where the selected uplink component carrier is the primary uplink component carrier and the first downlink component carrier is determined as being unsafe. The user equipment again selects a second uplink component carrier with substantially the same uplink timing advance value as the main uplink component carrier for transmitting the random access request. The various component carriers may include a primary component carrier and one or more secondary component carriers, the selected uplink component carrier is the primary uplink component carrier, the first downlink component carrier is determined to be unsecured, and a new main uplink component carrier, associated with a secure downlink component carrier, is configured for the user equipment.
[00024] According to another aspect, the various component carriers may include a primary component carrier and one or more secondary component carriers, the selected uplink component carrier may be the primary uplink component carrier, the first uplink component carrier downlink is determined to be insecure, and the user equipment receives a contention-free random access request on a secure downlink component carrier. The request may include an indication regarding an association between the main uplink component carrier and the secure downlink component carrier. In one aspect, the various component carriers include a primary component carrier and one or more secondary component carriers, the selected uplink component carrier is the primary uplink component carrier, and the user equipment declares a radio link failure when the main uplink component carrier is determined to be unsecured.
[00025] In another aspect, the multiple component carriers include a primary component carrier and one or more secondary component carriers, and the user equipment selects a secondary uplink component carrier to transmit the random access request. The selected uplink component carrier may be detected as not being secure, the first downlink component carrier may be detected as being secure, and the user equipment may acquire uplink synchronization for an uplink component carrier that is wired. to the first downlink component carrier. In another exemplary example, the selected uplink component carrier may be detected as not being secure, the first downlink component carrier may be detected as being secure, and user equipment may iteratively attempt to acquire uplink synchronization acquisition for each uplink component carrier within an active subset of the various component carriers until uplink synchronization for at least one uplink component carrier is successfully achieved. User equipment may declare or provide a radio link failure if no attempt to acquire synchronization is successful.
[00026] Another aspect relates to a method for wireless communication that includes configuring multiple component carriers for use by a user equipment in a wireless communication network, where the multiple component carriers include uplink and downlink component carriers and wherein each uplink component carrier is associated with at least one downlink component carrier. This exemplary method, which can be used as part of a contention-based random access procedure by an eNodeB, further includes receiving a random access request from user equipment on a first uplink component carrier of the various component carriers, where the first uplink component carrier is identified by the user equipment. The method also includes transmitting a response on a first downlink component carrier of the plurality of component carriers, wherein the first downlink component carrier is coupled to the first uplink component carrier.
[00027] Another aspect refers to a user equipment that comprises a processor and a memory that stores executable code per processor. Processor executable code, when executed by the processor, configures the user equipment to select an uplink component carrier to transmit a random access request where the user equipment is configured to operate with a plurality of component carriers comprising component carriers of uplink and downlink. Processor executable code, when executed by the processor, also configures the user equipment to transmit the random access request on the selected uplink component carrier, and to receive a response to the random access request on a first downlink component carrier. on the multiple component carriers, where the first downlink component carrier is linked to the selected uplink component carrier.
[00028] In one aspect, the per-processor executable code, when executed by the processor, configures the user equipment to acquire uplink synchronization for each secondary uplink component carrier within an active subset of the various component carriers configured for use by the user equipment when the uplink timing advance value associated with each secondary uplink component carrier is different from the uplink timing advance value associated with the component carrier and primary uplink. In another aspect, the processor executable code, when executed by the processor, configures the user equipment to acquire uplink synchronization for one or more secondary uplink component carriers within an active subset of the various component carriers configured for use by the equipment. when the uplink timing advance value associated with one or more secondary uplink component carriers is different from the uplink timing advance value associated with the primary uplink component carrier, where the one or more carriers Secondary uplink components are identified by an entity in the wireless network other than the user equipment.
[00029] Another aspect refers to a user equipment that comprises a processor and a memory that stores executable code per processor. Processor executable code, when executed by the processor, configures user equipment to use multiple component carriers, where the multiple component carriers include uplink and downlink component carriers and where each uplink component carrier is associated with at least one downlink component carrier. Processor executable code, when executed by the processor, also configures the user equipment to receive a random access request on a first uplink component carrier from the various component carriers, where the first uplink component carrier is identified by the uplink component user. The processor-executable code, when executed by the processor, further configures the user equipment to transmit a response on a first downlink component carrier of the various component carriers, where the first downlink component carrier is coupled to the uplink component carrier .
[00030] Another aspect relates to a wireless communication device that includes means for selecting an uplink component carrier to transmit a random access request by a user equipment, where the user equipment is configured to operate with multiple carriers. component comprising uplink and downlink component carriers. The wireless communication device also includes means for transmitting the random access request on the selected uplink component carrier; and means for receiving a response to the random access request on a first downlink component carrier among the plurality of component carriers, wherein the downlink component carrier is linked to the selected uplink component carrier.
[00031] Another aspect relates to a wireless communication device that includes means for configuring multiple component carriers for use by a user equipment in a wireless communication network, where the multiple component carriers comprise uplink and downlink component carriers. downlink where each uplink component carrier is associated with at least one downlink component carrier. The wireless communication device also includes means for receiving a random access request from the user equipment on a first uplink component carrier of the plurality of component carriers, wherein the first uplink component carrier is identified by the user equipment. The wireless communication device further includes means for transmitting a response on a first downlink component carrier of the plurality of component carriers, wherein the first downlink component carrier is coupled to the first uplink component carrier.
[00032] Another aspect relates to a computer program product, embedded in a non-transient computer readable medium that includes program code to select an uplink component carrier to transmit a random access request by a user equipment and a wireless communication network, where the user equipment is configured to operate with multiple component carriers comprising uplink and downlink component carriers. The computer program product further includes program code for transmitting the random access request on the selected uplink component carrier, and program code for receiving a response to the random access request on a first downlink component carrier on the various carriers. component, where the first downlink component carrier is linked to the selected uplink component carrier.
[00033] Another aspect refers to a computer program product, embedded in a non-transient computer-readable medium that includes program code for configuring various component carriers for use by a user equipment in a wireless communication network, where the various component carriers include uplink and downlink component carriers and where each uplink component carrier is associated with at least one downlink component carrier. The computer program product further includes program code for receiving a random access request from the user equipment on an uplink component carrier of the various component carriers, where the uplink component carrier is identified by the user equipment. The computer program product further includes program code for transmitting a response on a first downlink component carrier of the plurality of component carriers, wherein the first downlink component carrier is coupled to the first uplink component carrier.
[00034] These and other features of the various modalities, together with the organization and manner of operation thereof, will become evident from the following detailed description when considered in conjunction with the accompanying drawings, in which similar reference numerals are used for refer from beginning to end to similar parts. Brief Description of Drawings
[00035] Several described modalities are illustrated as an example and not as a limitation, with reference to the attached drawings, in which:
[00036] Figure 1 illustrates a wireless communication system;
[00037] Figure 2 illustrates a block diagram of a communication system;
[00038] Figure 3 illustrates an exemplary wireless network;
[00039] Figure 4 illustrates a wireless system that uses multiple component carriers for communication;
[00040] Figure 5 illustrates an exemplary uplink radio frame timing synchronization in a wireless communication system;
[00041] Figure 6 illustrates the communications between a user equipment and an eNodeB in a contention-based random access procedure;
[00042] Figure 7 illustrates the communications between a user equipment and an eNodeB in a dispute-free random access procedure;
[00043] Figure 8 illustrates an exemplary heterogeneous network (hetNet) that performs random access operations;
[00044] Figure 9 illustrates a set of exemplary operations to enable a dispute-free random access procedure for a user equipment;
[00045] Figure 10 illustrates a set of exemplary operations to enable a dispute-free random access procedure through a wireless network entity;
[00046] Figure 11 illustrates a set of exemplary operations to enable a contention-based random access procedure through a user equipment;
[00047] Figure 12 illustrates a set of exemplary operations to enable a contention-based random access procedure through a wireless network entity;
[00048] Figure 13 illustrates an association between uplink and downlink component carriers;
[00049] Figure 14 illustrates a system within which various embodiments according to the present description can be implemented; and
[00050] Figure 15 illustrates an equipment within which the various modalities according to the present description can be implemented. Detailed Description
[00051] In the preceding description, for purposes of explanation and not limitation, details and descriptions are presented to provide an understanding of the use of the various described modalities. However, it will be apparent to those skilled in the art that the various modalities may be practiced in other modalities which depart from these details and descriptions.
[00052] As used herein, the terms: “component”, “module”, “system”, and the like, are intended to refer to a computer-related entity whether hardware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable, an execution stream, a program, and/or a computer. As an illustration, an application running on a computing device, and the computing device, may constitute a component. One or more components may reside within a process and/or flow of execution and a component may be located on one computer and/or distributed between two or more computers. In addition, these components can run various computer-readable media that have various data structures stored on them. Components may communicate via local and/or remote processes such as according to a signal having one or more packets of data (e.g. data from one component interacting with another component on a local system, distributed system, and/or over a network such as the Internet with other systems via the signal).
[00053] In addition, certain modalities described here in connection with a mobile device. A user equipment may also be called, and may contain all or part of the functionality of a system, a subscriber unit, subscriber station, mobile station, mobile wireless terminal, mobile device, node, device, remote station, remote terminal , access terminal, user terminal, terminal, wireless communication device, wireless communication equipment or user agent. A user equipment can be a cell phone, a satellite phone, a cordless phone, a Session Initiation Protocol (SIP) handset, a smart phone, a wireless local area network (WLL) station, a personal digital assistant (PDA), a laptop, a handheld communication device, a handheld computing device, a satellite radio, a wireless modem card, and/or other device for communicating over a wireless system. In addition, several aspects are described here in connection with a base station. A base station may be used for communication with one or more wireless terminals and may also be referred to, and may contain part or all of the functionality of an access point, node, Node B, Node B evolved (eNode B or eNB), or some other network entity. A base station communicates via the air interface with wireless terminals. Communication can take place across one or more sectors. The base station can act as a router between the wireless terminal and the rest of the access network, which can include an Internet Protocol (IP) network by converting incoming air interface frames into IP packets. The base station can also coordinate attribute management for the air interface, and it can also be the gateway between the wired network and the wireless network.
[00054] Various aspects, modalities, or characteristics will be presented in terms of systems that may include some devices, components, modules and the like. It should be understood and considered that various systems may include additional devices, components, modules, and so on, and/or may not include all devices, components, modules, and so on, discussed in connection with the figures. A combination of these approaches can also be used.
[00055] Additionally, in the description under study, the word "exemplary" is used meaning serving as an example, instance, or illustration. An embodiment or model described herein as "exemplary" is not necessarily to be considered preferred or advantageous over other embodiments or models. More properly, the use of the word exemplar is intended to present concepts in a concrete way.
[00056] The various modes described can be incorporated into a communication system. In one example, such a communication system utilizes an orthogonal frequency division multiplex (OFDM) that effectively divides the total system bandwidth into multiple (NF) subcarriers, which may also be referred to as frequency subchannels, tones, or radio frequency bands. For an OFDM system, the data to be transmitted (i.e. the information bits) is first encoded with a specific encoding scheme to generate encoded bits, and the encoded bits are further grouped into multi-bit symbols which are then mapped to modulation symbols. Each modulation symbol corresponds to a point in a constellation of signals defined by a specific modulation scheme (eg M-PSK or M-QAM) used for data transmission. In each time slot which may be dependent on the bandwidth of each frequency subcarrier, a modulation symbol may be transmitted on each of the NF frequency subcarriers. Thus, OFDM can be used to combat intersymbolic interference (ISI) caused by frequency selective fading, which is characterized by different amounts of attenuation across system bandwidth.
[00057] As noted earlier, uplink and downlink communications between the base station and user equipment can be established via a single-input, single-output (SISO), multiple-in, single-output (SISO) system ( MISO), single-in, multiple-out (SIMO), or multiple-in, multiple-out (MIMO). A MIMO system employs multiple transmit antennas (NT) and multiple receive antennas (NR) for data transmission. A MIMO channel formed by the transmit antennas NT and the receive antennas NR can be decomposed into NS independent channels, which are also referred to as spatial channels, where NS < min{NT, NR}. Each of the independent NS channels corresponds to a dimension. The MIMO system can provide improved performance (eg, superior transmit capability and/or greater reliability) if the additional dimensionalities created by multiple transmit and receive antennas are utilized. A MIMO system also supports time division duplex (TDD) and frequency division duplex (FDD) systems. In a TDD system, forward link or reverse link transmissions are in the same frequency region so the reciprocity principle allows estimation of the forward link channel from the reverse link channel. This enables the base station to extract transmit beamforming gain on the downlink when multiple antennas are available at the base station.
[00058] Figure 1 illustrates a wireless communication system within which the various aspects disclosed herein can be incorporated. As shown, base station 100 may include multiple antenna groups, and each antenna group may comprise one or more antennas. For example, if the base station 100 comprises six antennas, one group of antennas may comprise a first antenna 104 and a second antenna 106, another group of antennas may comprise a third antenna 108 and a fourth antenna 110, while a third group may comprise a fifth antenna 112 and a sixth antenna 114. It should be noted that although each of the above-mentioned antenna groups was identified as having two antennas, a greater or lesser number of antennas may be used in each antenna group and may be arranged in various orientations with respect to each antenna and each antenna group.
[00059] A first equipment 116 is illustrated as being in communication with, for example, the fifth antenna 112 and the sixth antenna 114 to enable the transmission of information to the first user equipment 116 through a first direct link 120, and the receiving information from the first user equipment 116 through a first reverse link 118. Figure 1 also illustrates a second user equipment 122 that is in communication with, for example, the third antenna 108 and the fourth antenna 110 to enable transmitting information to the second user equipment 122 over a second forward link 126, and receiving information from the second user equipment 122 over a second reverse link 124. In a Frequency Division Duplex (FDD) system ), the communication links 118, 120, 124, 126 that are shown in Figure 1 may use different frequencies for communication. For example, the first forward link 120 may use a different frequency than that used by the first reverse link 118.
[00060] In some embodiments, each group of antennas and/or the area in which they are designed for communication is often referred to as a sector of the base station. For example, different groups of antennas that are illustrated in Figure 1 can be designed to communicate with user equipment in a sector of the base station 100. In communicating over direct links 120 and 126, the transmit antennas of the base station 100 use beamforming to optimize the output/noise ratio of the direct links to different user equipment 116 and 122. In addition, a base station that can use beamforming to transmit to user equipment scattered randomly throughout its area of coverage causes less interference to user equipment in neighboring cells than a base station that transmits omnidirectionally through a single antenna to all of its user equipment.
[00061] Communication networks that can accommodate any of the various modes described may include logical channels that are classified into Control Channels and Traffic Channels. Logical control channels may include transmission control channel (BCCH), which is the downlink channel for transmitting system control information, a radio call control channel (PCCH), which is the downlink channel that transfers radio call information, a multicast control channel (MCCH), which is a point/multipoint downlink channel used to transmit multimedia broadcast and multicast service scheduling and control information for one or more traffic channels from multicast (MTCHs). Generally, after establishing radio resource control (RRC) connection, MCCH is used only by user equipment receiving MBMS. Dedicated Control Channel DCCH is another logic control channel which is a bidirectional point-to-point channel transmitting dedicated control information, such as user-specific control information used by equipment having an RRC connection. The common control channel (CCCH) is also a logical control channel that can be used for random access information. Logical traffic channels may comprise a dedicated traffic channel (DTCH), which is a bidirectional point-to-point channel dedicated to a user equipment for transferring user information. In addition, the multicast traffic channel (MTCH) can be used for point-to-multipoint downlink transmission of traffic data.
[00062] Communication networks that accommodate some of the various modalities may additionally include logical transport channels that are classified into downlink (DL) and uplink (UL). DL transport channels can include a broadcast channel (BCH), a downlink shared data channel (DL-SDCH), a multicast channel (MCH), and a Radio Call Channel (PCH). UL transport channels can include a random access channel (RACH), a request channel (REQCH), an uplink shared data channel (UL-SDCH), and multiple physical channels. Physical channels can also include a set of downlink and uplink channels.
[00063] In some described embodiments, the physical downlink channels may include at least one of a Common Pilot Channel (CPICH); Synchronization Channel (SCH); Common Control Channel (CCCH); Shared Downlink Control Channel (SDCCH); Multicast Control Channel (MCCH); Shared Uplink Assignment Channel (SUACH); Confirmation Channel (ACHCH); Downlink Physical Shared Data Channel (DL-PSDCH); Uplink Power Control Channel (UPCCH); Alert Indicator Channel (PICH); and Load Indicator Channel (LICH), a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical downlink control channel (PDCCH), a physical hybrid ARQ indicator channel (PHICH) ), a physical downlink shared channel (PDSCH) and a physical multicast channel (PMCH). Uplink physical channels include at least one of a Physical, Random Access Channel (PRACH), Channel Quality Indicator Channel (CQICH); Acknowledgment Channel (ACKCH); Antenna Subset Indicator Channel (ASICH); Shared Request Channel (SREQCH); Uplink Shared Physical Data Channel (UL-PSDCH) and Broadband Pilot Channel (BPICH), an uplink physical control channel (PUCCH) and an uplink physical shared channel (PUSCH).
[00064] In addition, the following terminology and characteristics can be used in describing the various modes described: 3G 3rd Generation 3GPP 3rd Generation Partnership Project ACLR Adjacent Channel Spread Ratio ACPR Adjacent Channel Power Ratio ACS Adjacent channel ADS Advanced Model System AMC Adaptive Modulation and Coding A-MPR Additional Maximum Power Reduction ARQ Auto Repeat Request BCCH BTS Transmit Control Channel Transceiver Base Station CDD Cyclic Delay Diversity CCDF Complementary Cumulative Distribution Function CDMA Multiple Access by code division CFI Co-MIMO Control Format Indicator Co-operative MIMO CP Cyclic Prefix CPICH Common Pilot Channel CPRI Common Public Radio Interface CQI Channel Quality Indicator CRC Cyclic Redundancy Check DCI Downlink Control Indicator DFT Discrete Transform of Fourier DFT-SOFDM scattering OFDM discrete Fourier transform DL Downlink (base station to subscriber transmission DL-SCH Downlink shared channel DSP Digital signal processing DT DVSA development toolkit Digital vector signal analysis EDA Electronic model automation E-DCH Dedicated channel Enhanced E-UTRAN Evolved UMTS Terrestrial Radio Access Network eMBMS Evolved Multicast Multicast Service ENB Evolved B-Node EPC Evolved Packet Core EPRE Energy Per Resource Element ETSI European Telecommunications Standards Institute E-UTRA Evolved UTRA E-UTRAN UTRAN Evolved EVM Error Vector Magnitude FDD Frequency Division Duplex FFT Fast Fourier Transform FRC Fixed Reference Channel FS1 Frame Structure Type 1 FS2 Frame Structure Type 2 GSM Global System for Mobile Communication HARQ Hybrid Auto Repeat Request HDL Hardware Description Language HI HARQ Indicator HSDPA Access High Speed Downlink Packet HSPA High Speed Packet Access HSUPA High Speed Uplink Packet Access IFFT Inverse FFT IOT IP Interoperability Test Internet Protocol LO Local Oscillator LTE Long Term Evolution MAC Medium Access Control MBMS Multicast multimedia streaming service MBSFN Multicast/broadcast over single frequency network MCH Channel Multicast MIMO Multiple input, multiple output MISO Multiple input, single output MME Mobility Management Entity MOP Maximum Output Power Maximum Power Reduction Multiple MIMO NAS users Non-Access Stratum OBSAI Open Base Station Architecture Interface OFDM Orthogonal Frequency Division Multiplexing OFDMA Orthogonal Frequency Division Multiple Access PAPR Peak/Average Power Ratio PAR Peak/Average Ratio PBCH Physical Transmission Channel P- CCPCH Main common control physical channel PCFCHI Physical channel the PCH control format indicator Radio call channel PDCCH Downlink control physical channel PDCP Packet data convergence protocol PDSCH Downlink shared physical channel PHICH Indicator physical channel ARQ hybrid PHY Physical layer PRACH Physical random access channel PMCH Channel physical multicast PMI Precoding matrix indicator P-SCH Main sync signal PUCCH Uplink control physical channel PUSCH Uplink physical shared channel RACH Time division duplex TDD random access channel.
[00065] Figure 2 illustrates a block diagram of an exemplary communication system that can accommodate various embodiments in accordance with the present description. Communication system 200 may be a MIMO system which is illustrated exemplarily in Figure 2 and comprises a transmitter system 210 (e.g., a base station or access point) and a receiving system 250 (e.g., an access terminal or a user equipment). It will be appreciated by those of ordinary skill in the art that although the base station is referred to as a transmitter system 210; and a user equipment is referred to as a receiving system 250, as illustrated, embodiments of these systems are capable of two-way communications. In this regard, the terms "transmitting system 210" and "receiver system 250" should not be used to mean single directional communications from either system. It should also be noted that the transmitting system 210 and the receiving system 250 of Figure 2 are individually capable of communication with various other receiving and transmitting systems that are not explicitly illustrated in Figure 2. In the transmitting system 210, traffic data for some traffic flows data is provided from a data source 212 to a transmit data processor (TX) 214. Each data stream may be transmitted via a respective transmitting system. The TX data processor 214 formats, encodes and interleaves the traffic data for each data stream, based on a specific encoding scheme selected for that data stream, to provide the encoded data.
[00066] The encoded data for each data stream can be multiplexed with pilot data using, for example, OFDM techniques. Pilot data is typically in a known pattern of data, which is processed in a known manner and can be used in the receiving system to estimate the channel response. The coded and pilot data multiplexed for each data stream is then modulated (symbol-mapped) based on the specific modulation scheme (e.g. BPSK, QSPK, M-PSK or M-QAM) selected for that data stream for provide modulation symbols. The data rate, encoding and modulation for each data stream can be determined by instructions carried out by a processor 230 of the transmitter system 210.
[00067] In the exemplary block diagram of Figure 2, the modulation symbols for the data streams can be provided to a TX MIMO processor 220, which can further process the modulation symbols (for example, for OFDM). The TX MIMO processor 220 then provides NT modulation symbol streams to NT transmitters (TMTR) 222a to 222t. In various embodiments, the TX MIMO processor 220 employs beamforming weights to the symbols in the data streams and to the antenna from which the symbol is being transmitted.
[00068] Each transmitting system transceiver 222a to 222t receives and processes a respective symbol stream to provide one or more analog signals, and further conditions the analog signals to provide a modulated signal suitable for transmission over a MIMO channel. In some embodiments, conditioning may include, but is not limited to, operations such as amplification, filtering, upconverting, and the like. The modulated signals produced by transmitter system transceivers 222a to 222t are then transmitted from transmitter system antennas 224a to 224t which are shown in Figure 2.
[00069] In the receiving system 250, the transmitted modulated signals may be received by the receiving system antennas 252a to 252r, and the signal received from each of the receiving signal antennas 252a to 252r is provided to a respective receiving system transceiver (RCVR) 254a to 254r. Each receiving system transceiver 254a to 254r conditions a respective received signal, digitizes the conditioned signal to provide samples, and may further process the samples to provide a corresponding "received" symbol stream. In some embodiments, conditioning may include, but is not limited to, operations such as amplification, filtering, downconversion, and the like.
[00070] An RX data processor 260 then receives and processes the symbol streams from the receiver system transceivers 254a to 254r based on a specific receiver processing technique to provide a plurality of "detected" symbol streams. In one example, each detected symbol stream may include symbols that are estimates of the transmitted symbols for the corresponding data stream. The RX data processor 260 then, at least in part, demodulates, deinterleaves, and decodes each detected symbol stream to retrieve the traffic data for the corresponding data stream. Processing by the RX data processor 260 may be complementary to that performed by the TX MIMO processor 220 and the TX data processor 214 in the transmitting system 210. The RX data processor 260 may additionally provide processed symbol streams to a data warehouse. data 264.
[00071] In some embodiments, a channel response estimate is generated by the RX 260 data processor and can be used to perform space/time processing on the 250 receiver system, adjust power levels, change rates or modulation schemes. , and/or other appropriate actions. Additionally, the RX data processor 260 can additionally estimate channel characteristics such as signal-to-noise ratio (SNR) and signal-to-interference (SIR) of the detected symbol streams. Data processor RX 260 may then provide estimated channel characteristics to a processor 270. In one example, data processor RX 260 and/or processor 270 of receiving system 250 may further derive an estimate of the "operating" SNR for the system. Processor 270 of receiving system 250 may also provide channel status information (CSI) (also referred to as channel status information in some embodiments), which may include information regarding the communication link and/or received data stream. This information; which may contain, for example, the operating SNR, and other channel information; can be used by the transmitting system 210 (e.g., base station or eNodeB) to make appropriate decisions regarding, for example, user equipment programming, MIMO settings, modulation and encoding options, and the like. In the receiving system 250, the CSI that is produced by the processor 270 is processed by a TX data processor 238, modulated by a modulator 280, conditioned by the receiving system transceivers 254a to 254r and transmitted back to the transmitting system 210. , a data source 236 in the receiving system 250 may provide additional data to be processed by the TX data processor 238.
[00072] In some embodiments, the processor 270 in the receiving system 250 may also periodically determine which precoding matrix to use. Processor 270 formulates a reverse link message comprising an array index portion and a category value portion. The reverse link message may comprise various types of information regarding the communication link and/or the received data stream. The reverse link message is then processed by the TX data processor 238 in the receiving system 250, which may also receive traffic data for some of the data streams from the data source 236. The processed information is then modulated by a modulator. 280, conditioned by one or more transceivers of receiving system 254a to 254r, and transmitted back to transmitting system 210.
[00073] In some embodiments of the MIMO communication system 200, the receiver system 250 is capable of receiving and processing spatially multiplexed signals. In this system, spatial multiplexing takes place in the transmitter system 210 by multiplexing and transmitting different data streams in the transmitter system antennas 224a to 224t. This contrasts with the use of broadcast diversity schemes, where the same data stream is sent from multiple transmitter system antennas 224a to 224t. In a MIMO communication system 200 capable of receiving and processing the spatially multiplexed signals, a precoding matrix is typically used in the transmitting system 210 to ensure that the signals transmitted from each of the transmitting system antennas 224a to 224t are sufficiently uncorrelated with each other. This decorrelation ensures that the composite signal arriving at any particular receiver system antenna 252a to 252r can be received and individual data streams can be determined in the presence of signals carrying other data streams from other transmitting system antennas 224a to 224t .
[00074] As the degree of correlation between the flows can be influenced by the environment, it is advantageous for the receiving system 250 to feed back information to the transmitting system 210 through the received signals. In such systems, both the transmitter system 210 and the receiver system 250 contain a codebook with a number of precoding matrices. Each of these precoding matrices can, in some cases, be related to an amount of cross-correlation experienced in the received signal. As it is advantageous to send the index of a specific matrix rather than the values in the matrix, the feedback control signal sent from the receiving system 250 to the transmitting system 210 typically contains the index of a specific precoding matrix ( that is, the precoding matrix indicator (PMI)). In some cases, the feedback control signal also includes a category indicator (RI) which tells the transmitting system 210 how many independent data streams to use in spatial multiplexing.
[00075] Other embodiments of the MIMO 200 communication system are configured to use transmit diversity schemes instead of the spatially multiplexed scheme described above. In these embodiments, the same data stream is transmitted through the transmitter system antennas 224a to 224t. In these embodiments, the data rate provided to the receiving system 250 is typically less than that of spatially multiplexed MIMO communication systems 200. These embodiments provide robustness and reliability of the communication channel. In broadcast diversity systems, each of the signals transmitted from the transmitter system antennas 224a to 224t will experience a different interference environment (eg, fading, reflection, multipath phase shifts). In such embodiments, the different signal characteristics received at receiver system antennas 252a to 254r are useful in determining the appropriate data stream. In these embodiments, the category indicator is typically set to 1, telling the transmitter system 210 not to use spatial multiplexing.
[00076] Other modalities may use a combination of spatial multiplexing and transmission diversity. For example, in a MIMO communication system 200 using four transmitter antennas 224a to 224t, a first data stream may be transmitted on two of the transmitter system antennas 224a to 224t and a second data stream transmitted on the remaining two transmitter antennas. transmitter system 224a to 224t. In these embodiments, the category index is set to an integer lower than the full category of the precoding matrix, instructing the transmitter system 210 to deliver a combination of spatial multiplexing and transmission diversity.
[00077] In the transmitter system 210, the modulated signals from the receiver system 250 are received by the transmitter system antennas 224a to 224t, are conditioned by the transmitter system transceivers 222a to 222t, are demodulated by a transmitter system demodulator 240, and are processed by the RX data processor 242 to extract the reservation link message transmitted by the receiving system 250. In some embodiments, the processor 230 of the transmitting system 210 then determines which precoding matrix to use for future forward link transmissions, and then processes the extracted message. In other embodiments, processor 230 uses the received signal to adjust beamforming weights for future forward link transmissions.
[00078] In other embodiments, a reported CSI may be provided to the processor 230 of the transmitting system 210 and used to determine, for example, data rates as well as encoding and modulation schemes to be used by one or more data streams. The determined coding and modulation schemes may then be provided to transmitter system transceivers 222a through 222t, at transmitter system 210 for quantization and/or use in downstream transmissions to receiver system 250. Additionally and/or alternatively, the reported CSI may be used by the processor 230 of the transmitter system 210 to generate various controls for the data processor TX 214 and MIMO processor TX 220. In one example, CSI and/or other information processed by the data processor RX 242 may be provided to a warehouse of data 244.
[00079] In some embodiments, processor 230 in transmitting system 210 and processor 270 in receiving system 250 may direct operation in their respective systems. Additionally, memory 232 in transmitting system 210 and memory 272 in receiving system 250 may provide storage for program codes and data used by the receiving system processor 230 and the receiving system processor 270, respectively. Additionally, in the receiving system 250, various processing techniques can be used to process the received signals NR to detect the transmitted symbol streams NT. Such receiver processing techniques may include space-time and spatial-receiver processing techniques, which may also be referred to as equalization techniques, and/or "successive equalization and interference cancellation" receiver processing techniques. ”, which may also be referred to as “successive interference cancellation” or “successive cancellation” receiver processing techniques.
[00080] The described modalities can be used in conjunction with systems that operate in modes: frequency division duplex (FDD) or time division duplex (TDD). In FDD systems, different carrier frequencies are configured for uplink and downlink transmissions. In time division duplex (TDD) systems, uplink and downlink transmissions are performed on the same carrier frequency such that uplink and downlink transmissions within a frame are separated in time. Additionally, uplink and downlink resources within a TDD frame are not necessarily allocated symmetrically.
[00081] Figure 3 illustrates an exemplary access network in an LTE network architecture that can be used in conjunction with the present description. In this example, the access network 300 is divided into a number of cellular regions (cells) 302. An eNodeB 304 is assigned to a cell 302 and is configured to provide an access point to a core network for all user equipment. (UEs) 306 in cell 302. Each user equipment 306 can communicate with one or more eNodesB 304 on a forward link and/or a reverse link at a specific time, depending on whether the user equipment 306 is active and whether he is in soft handoff, for example. Access network 300 may provide service over a large geographic area where, for example, illustrated cells 302 may cover a few blocks in the vicinity.
[00082] There is no centralized controller in the exemplary access network 300 of Figure 3, but a centralized controller can be used in alternative configurations and embodiments. In other configurations, an eNodeB 304 may control the operations of multiple 302 cells. The eNodeB 304 may be responsible for all radio-related functions including radio carrier control, admission control, mobility control, scheduling, security, and connectivity. with the server portal on a core network. The network in Figure 3 can also be used to enable transmission and/or reception of multiple coordinate points (CoMP). In such exemplary systems, coordinated transmissions from multiple antennas in different cells 302 can be used to improve system performance. Coordinated transmissions and/or receptions are particularly advantageous for user equipment 306 that is located away from the antenna within a cell 302. For example, upon transmission of the same signal from multiple antennas at different locations, the signal-to-noise ratio of the signal received at user equipment 306 can be improved.
[00083] In the description of the various entities of Figure 3, as well as other associated figures, for the purpose of explanation, the nomenclature associated with an LTE 3GPP or LTE-A wireless network is used. However, it should be noted that system 400 may be adapted to operate on other networks such as, but not limited to, an OFDMA wireless network, a CDMA network, a CDMA2000 3GPP2 network, and the like.
[00084] In LTE-A based systems, an equipment and user can be configured with multiple component carriers used by an eNodeB to enable a wider global transmission bandwidth. Such configuration can be accomplished through layer 3 operations (ie radio resource control (RRC)). In addition, to enable communication between the eNodeB and user equipment, some or all of the configured component carriers must be enabled. Activation can be performed by Layer 2 signaling. Figure 4 illustrates an exemplary component multi-carrier system in which user equipment 410 can be configured with "component carrier 1" 430 to "component carrier N" 440, where N is an integer greater than or equal to 1. Figure 4 illustrates two or more component carriers. It should be appreciated that the user equipment 410 may be configured with any suitable number of component carriers and, accordingly, the subject matter disclosed and claimed herein is not limited to two or a specific number of component carriers. In one example, some of the multiple component carriers 430 to 440 may be LTE Version 8 carriers. Thus, some of the component carriers 430 to 440 may appear as an LTE carrier or as legacy user equipment (e.g. based on LTE Version 8 ).
[00085] Each component carrier 430 to 440 of Figure 4 may include respective downlinks 432 and 442 as well as respective uplinks 434 and 444. In the following sections, each of the forward links 432 to 442 may be referred to as a component carrier of downlink, while each of the reverse links 434 to 444 may be referred to as an uplink component carrier. It should be noted that the exemplary diagram of Figure 4 illustrates an equal number of uplink and downlink component carriers. However, in some systems, the number of uplink component carriers may differ from the number of downlink component carriers. Additionally or alternatively, the bandwidth of the aggregated uplink component carriers may be different from the bandwidth of the aggregated downlink component carriers.
[00086] In some multi-component carrier systems, a user equipment may be configured with only one primary component carrier (PCC) and one or more secondary component carriers (SCCs). In some scenarios an uplink component carrier is associated with a downlink component carrier to enable proper communications between a user equipment and an eNodeB. Such association, or binding, can be signaled to user equipment as part of system information blocks (SIBs). In one example, SIB2 is used to drive uplink and downlink association to user equipment.
[00087] Proper communication between a user equipment and an eNodeB may require acquiring and maintaining uplink synchronization. Such synchronization can prevent interference between multiple user equipment with uplink data that is scheduled to be transmitted during the same unit of information (eg, a subframe of the communication system). When a user equipment is in the RRC_CONNECTED state, the eNodeB can provide a timing advance value as part of the timing control information to allow the user equipment to adjust the timing of its uplink transmissions.
[00088] Timing advance value in the uplink synchronization context, according to one embodiment, is described with reference to Figure 5. An exemplary timing advance (TA) command that is provided by the eNodeB user equipment, includes information regarding how the timing of uplink transmit radio frames should be adjusted in relation to the actual timing of downlink radio frames associated with that user equipment. Figure 5 illustrates exemplary timing relationships between uplink and downlink radio frames for given user equipment of a communication system. As illustrated in the exemplary diagram of Figure 5, transmission of uplink radio frame i 504 begins (NTA + NTA offset) x TS seconds before transmission of downlink radio frame i 502, where TS is the unit of time base and is equal to 1/(15,000 x 2,048) seconds for LTE systems. NTA offset is zero for LTE frame frame type 1 and 624 for LTE frame frame type 2 (except in a random access response, where NTA offset is zero for both frame frame types). A timing advance command enables the user equipment to check the NTA timing advance value to perform the necessary timing adjustment for uplink synchronization.
[00089] Synchronization between uplink and downlink transmissions can become distorted or lost due to system and tracking tolerance errors, (for example, if no uplink transmissions have occurred for a long time and/or when new timing control information is issued while the user equipment is still in the process of carrying out a previous timing control command). If the uplink is declared unsynchronized, a random access procedure can be initiated to reacquire uplink synchronization. A random access procedure is also initiated, and uplink synchronization is acquired, when a user equipment is moving from the RRC_IDLE state to the RRC_CONNECTED state, when a new radio link is established after a radio link failure, when uplink synchronization is required during a handover to a new cell and in other scenarios where uplink synchronization and/or assignment of a unique user equipment identity (e.g., a Temporary Cell Radio Network Identity (C- RNTI)) is required. A random access procedure in LTE systems can be conducted in one of two ways: contention-based and contention-free.
[00090] In a contention-based random access procedure, which is illustrated in the exemplary diagram of Figure 6, user equipment 602 initiates the random access procedure by transmitting a random access request 606 to eNodeB 604 on the channel physical random access (PRACH). Request 606 comprises a preamble that is selected from a specific group of preamble sequences associated with the cell. For example, a cell may have a set of 64 preambles, a subset of which may be used by user equipment 602 to initiate a contention-based random access procedure. The remaining preambles are reserved for a dispute-free procedure. In response to receiving a random access request 606, eNodeB 604 transmits a response 608 to user equipment 602. Such response includes information such as timing information, a temporary random access radio network identifier, or C-RNTI ( RA-RNTI), a scheduling grant for uplink transmission and the like. The 608 response is sent on the downlink shared physical channel (PDSCH).
[00091] In the next step of a contention-based procedure, user equipment 602 responds to eNodeB 604 by sending a message 610 that includes an RRC connection request, a schedule request, and other information. Message 610 may also include user equipment identity 602 that is used by eNodeB 604 as part of the contention-resolution mechanism. In a contention-based procedure, two or more user devices 602 can initiate a random access procedure using the same preamble at the same time. Therefore, as the last step of a contention-based random access procedure, the eNodeB 604 transmits a contention resolution message 612 to all user equipment 602 to signal the selection of a specific user equipment for subsequent communications.
[00092] In a dispute-free random access procedure, which is illustrated in the exemplary diagram of Figure 7, the eNodeB 704 initiates the process by transmitting a request 706 to user equipment 702. Such request 706 comprises an index of reserved preamble that enables user equipment 702 to perform a dispute-free random access procedure. Next steps of a dispute-free random access procedure include transmission of reserved preamble 708 by user equipment 702 to eNodeB 704, which triggers eNodeB 704 to transmit a response 710 that includes required parameters and scheduling information. for subsequent communications.
[00093] To participate in a contention-based random access procedure, a user equipment is configured with an uplink component carrier, which is used to communicate the random access preamble. User equipment may also be configured with a downlink component carrier that is linked to that uplink component carrier. Linking can be carried out, for example, via a cell-specific link SIB2. In a basic scenario, a random access procedure for establishing/reestablishing radio resource control (RRC) can be performed based on the RACH parameters and a pair of single component carriers using parameters obtained from the system information block and /or dedicated signage that targets one or more user equipment.
[00094] As noted earlier, in a multiple component carrier system, a user equipment may be configured with a primary component carrier and one or more secondary component carriers. Such a configuration allows a random access procedure to be performed using only the main uplink/downlink component carrier pair. In such scenarios, the random access channel (RACH) associated with the main component carriers is used for transmission of the random access preamble in a contention-based random access procedure. User equipment may also be permitted to perform a random access procedure on a specific pair of uplink/downlink component carriers which may or may not include the main component carriers. As such, user equipment can be configured with random access channels that correspond to secondary component carriers. In such configurations, when a random access procedure is required via uplink data arrival and/or downlink data arrival with contention-based access, the user equipment can select a specific RACH from the set of RACHs configured. In one example, the selected RACH is associated with a downlink activated component carrier.
[00095] With multi-component carrier systems, the eNodeB can provide specific resources for a user equipment to perform a dispute-free random access procedure. For this purpose, the random access request is transmitted on a first downlink component carrier (for example, the main downlink component carrier). However, there is typically no indication in eNodeB communications over PDCCH as to which uplink component carrier should be used for the random access procedure. In one example, the user equipment may select an uplink component carrier that is associated with the first downlink component carrier (that is, the downlink component carrier that was used to initiate the request). In another example, the association or link between the first uplink and the selected downlink is ascertained from the SIB2 information.
[00096] Alternatively, or additionally, such association may be established through dedicated signaling aimed at one or more user equipment. In one example, the selected uplink component carrier is the main uplink component carrier. As the main uplink component carrier may be the only component carrier that is configured to carry uplink control information (e.g. acknowledgments (ACK), schedule requests (SR), and channel quality indicator (CQI)) , the selection of the main uplink component carrier allows transmission of uplink control information as well as random access information on the same component (i.e. main) carrier, thereby facilitating downlink transmissions of new data .
[00097] The downlink component carrier may be associated with, or linked to, a secondary uplink component carrier. When a secondary uplink component carrier is used, uplink synchronization issues need additional consideration. As noted earlier, proper uplink synchronization is maintained to ensure secure communications between the user equipment and the eNodeB. When a user equipment is configured with multi-component carriers, each uplink component carrier may require a different timing advance value for uplink synchronization. For example, the timing advance value associated with a primary uplink component carrier may differ from the timing advance value associated with a secondary uplink component carrier. In such a scenario, transmitting uplink control information (e.g., ACK, SR, CQI, etc.) on the main uplink component carrier requires a different timing advance value than transmitting messages on the component carrier. uplink secondary, which could lead to confusion on the eNodeB. In accordance with the present description, uplink synchronization problems across different component carriers can be alleviated by selecting a secondary uplink component carrier that has substantially the same timing advance value as the main uplink component carrier. For example, the difference between the timing advance value for the secondary uplink component carrier obtained during random access procedure and the timing advance value for the primary uplink carrier may be within a synchronization tolerance. specific that is specified, for example, in the LTE specifications. Having substantially similar timing advance values between the main and selected uplink component carriers allows uplink control information to be transmitted readily on the main uplink component carrier.
[00098] The selected secondary uplink component carrier may have a timing advance value different from that of the primary uplink component carrier. In such a scenario, due to the absence of uplink synchronization, the user equipment may be unable to securely communicate the control information associated with the downlink received data. In one example, user equipment performs consecutive, contention-based random access procedures to acquire the necessary synchronization.
[00099] As part of the request for a dispute-free random access procedure, the PDCCH may additionally include an indication as to which uplink component carrier is to be used by the user equipment. As such, user equipment can readily use the "indicated" uplink component carrier for uplink communications based on the indication provided by the eNodeB. In this scenario, however, a specific downlink component carrier to transmit the response (eg, response 710 of Figure 7) is selected by the eNodeB. In one example, a downlink component carrier that is linked to the indicated uplink component carrier is selected. As previously noted, such binding can be performed through SIB2 signaling. In another example, the downlink component carrier that was used by the eNodeB for transmitting the initial request (ie request 706 of Figure 7) is selected for transmitting the response. In the last mentioned example, the random access procedure is facilitated in situations where the indicated uplink component carrier is the main uplink carrier, but its linked, transfer component carrier is not secure.
[000100] Figure 8 illustrates an exemplary scenario in which the downlink component carrier used for the initial contention-free random access request becomes unreliable, thereby enabling the use of a different downlink component carrier for subsequent transmissions downlink. The exemplary diagram in Figure 8 corresponds to a heterogeneous network (HetNet) that may include a low-energy pico cell and a high-energy macrocell that are used to cooperatively improve system capacity and optimize network coverage.
[000101] In the example of Figure 8, a dispute-free random access procedure is initiated for an equipment and user that is served by the pico cell. The user equipment is initially at position 1 where the coverage of the first (eg, main) carrier component (CC1) associated with the pico cell is small. When the user equipment switches to the range-expanding region (i.e., position 2), the linked downlink component carrier (i.e., CC1 of DL), which is not the range-expanding component carrier, may be determined to be unreliable. Therefore, downlink transmissions to user equipment may need to occur on the second downlink component carrier (ie, CC2 of DL). In such a scenario, the first uplink component carrier (CC1 of UL) can still be trusted. As the eNodeB may not know the quality of the downlink channels, it may first send a random access request on the downlink component carrier linked to the main component carrier (i.e., on DL CC1 which is linked to UL CC1) . If there is no response from the user equipment due, for example, to the movement of the user equipment, the eNodeB can transmit the random access request on another downlink component carrier (e.g., on DL CC2) with an indication that the first uplink component carrier (ie CC1 of UL) should be used for uplink transmissions. The scenario that was discussed in connection with Figure 8 provides an example of carrier control for a random access procedure. The above scenario also illustrates that it is advantageous to select the most reliable component carrier to conduct a random access procedure (eg, the range-expanding component carrier in the exemplary configuration of Figure 8).
[000102] Control by carrier in a dispute-free random access procedure can be enabled by using special signatures and/or RA-RNTIs to distinguish correspondence from a random access response received by user equipment on a component carrier downlink to a specific uplink component carrier. Particularly, the eNodeB's response on a particular downlink component carrier may correspond either to its linked uplink carrier, or another uplink carrier via over-carrier control signaling. To resolve this ambiguity, in one embodiment, the random access response that is transmitted by the eNodeB is scrambled through specific signature sequences, where each specific signature sequence identifies a specific uplink component carrier. In another embodiment, special component carrier RA-RNTIs may be reserved to identify specific, uplink component carriers. The random access response may then be scrambled by the component carrier-specific RNTI to signal a specific uplink component carrier. The means noted above for component carrier-specific scrambling can eliminate the need to transmit additional bits (eg, as part of the downlink control information (DCI)) to signal control over the carrier. In reality, such additional bits are not allowed in current LTE specifications. A user equipment, therefore, can receive the scrambled response, unscramble the response according to the special signature sequence number or the RNTI-RA reserved to ascertain the specific uplink component carrier.
[000103] Figure 9 illustrates a set of exemplary operations 900 that can be performed to enable a dispute-free random access procedure. The operations 900 of Figure 9 can be performed, for example, through a user equipment in a wireless communication network. As noted earlier, such user equipment can be configured to operate with a number of uplink and downlink component carriers. At 902, a request for a dispute-free random access procedure is received from an eNodeB. At 904, an uplink component carrier is selected to transmit a random access message in response to the received request. The selection of the uplink component carrier at 904 is based on an association between the uplink and downlink component carriers. For example, such an association may be established via SIB2 signaling or may be specified for user equipment via higher layer signaling. Referring back to Figure 9, at 906, the random access message is transmitted on the selected uplink component carrier, and at 908, a response to the transmitted random access message is received.
[000104] Figure 10 illustrates a set of exemplary operations 1000 that can be performed to enable a dispute-free random access procedure. The operations 1000 of Figure 10 can be performed, for example, by an eNodeB in a wireless communication network. The eNodeB can be in communication with one or more user devices on the wireless communication network. In 1002, several component carriers are configured for use by a user equipment. Such component carriers comprise uplink and downlink component carriers and each uplink component carrier is associated with at least one downlink component carrier. At 1004, a downlink component carrier is selected and a request for a random access procedure is transmitted to user equipment on the selected downlink component carrier. At 1006, a random access message from the user equipment is received. Such a message is received on an uplink component carrier that is identified by the user equipment. At 1008, a response to the user equipment is transmitted.
[000105] The described modalities further facilitate contention-based random access procedures. As illustrated in the exemplary diagram of Figure 6, a user equipment can initiate a contention-based random access procedure by transmitting a random access request to the eNodeB. Such a request may be sent upon arrival of uplink or downlink data when user equipment is not synchronized. For this purpose, the user equipment selects an uplink component carrier (hereinafter "the selected uplink component carrier") to transmit the request on a random access channel.
[000106] The eNodeB then transmits a response to the random access request. The response may be transmitted on a downlink component carrier that is linked to the selected uplink component carrier via SIB2 signaling. In order for the user equipment to receive the response from the eNodeB, the downlink component carrier associated with the selected uplink must be enabled. Therefore, when selecting an uplink component carrier to transmit the request, user equipment may need to ascertain whether the downlink component carrier associated with the selected uplink component carrier is among the active set of downlink component carriers.
[000107] As noted earlier, a user equipment can be configured with primary uplink/downlink component carriers and one or more secondary uplink/downlink component carriers. In such a multi-component carrier system, user equipment may need to establish uplink synchronization for more than one component carrier. User equipment may begin by selecting the main uplink component carrier to transmit the contention-based random access procedure. Alternatively, the user equipment may select a secondary uplink component carrier that has substantially the same timing advance value as the primary uplink component carrier. As noted in connection with contention-free random access procedures, the selection of a secondary uplink component carrier with substantially the same sync advance value as the primary uplink component carrier ensures uplink synchronization of the uplink transmissions. upstream mains (eg, control information transmissions) without incurring additional delays.
[000108] After selecting the primary uplink component carrier (or a secondary component carrier with substantially similar timing advance value), the user equipment may additionally perform a random access procedure for each configured and activated uplink component carrier remainder to obtain uplink synchronization when the timing advance values associated with the remaining uplink component carriers are different from the timing advance value of the selected uplink component carrier. Depending on the number of uplink component carriers remaining, this operation can increase the processing load of the user equipment. Therefore, in some embodiments, a network entity, such as an eNodeB, specifies a specific set of uplink component carriers to be synchronized. The number and/or identity of the uplink component carriers can be conveyed to user equipment on an as-needed basis. In one example, the eNodeB identifies the specific set of component carriers based on a temporary storage (BSR) status report and the amount of uplink data to be transmitted. Synchronization of the remaining uplink component carriers (or a subset thereof) can introduce additional delays in making the uplink component carriers available for data transmission. However, such a delay is unlikely to have a significant impact on the overall efficiency of user equipment operations. To reduce the impact of additional synchronization operations, in one example, the scheduler provides broad uplink assignment on a first synchronized uplink component carrier (e.g., the main uplink component carrier) until the carriers are synchronized. remaining uplink component.
[000109] In a scenario associated with a contention-based random access procedure, user equipment may determine that the downlink component carrier associated with the selected uplink component carrier is unreliable. For example, measurements conducted by user equipment may reveal that the downlink component carrier is unreliable. In one embodiment, the user equipment may restart the random access procedure on another uplink component carrier with substantially the same timing advance value as the selected (e.g., primary) component carrier. Such a newly selected uplink component carrier is uplink synchronized and is associated with a different downlink component carrier, thereby avoiding the use of the unreliable downlink component carrier.
[000110] When an unreliable downlink component carrier is detected, an uplink component carrier with substantially the same timing advance as the main uplink component carrier may not be available. Furthermore, if an uplink component carrier with substantially the same timing advance value as the main uplink component carrier is available, the downlink of the newly selected uplink component carrier can be considered to be unreliable. In such situations, the eNodeB can reconfigure the component carriers to assign a new main uplink component carrier to a reliable downlink. Alternatively, the eNodeB may initiate a contention-free random access procedure on a trusted downlink component carrier, indicating a specific uplink component carrier with a downlink response to the trusted component carrier.
[000111] In a scenario associated with a contention-based random access procedure, user equipment may determine that the selected uplink component carrier may be unreliable, but the associated downlink component carrier is reliable. Under such conditions, where the selected uplink component carrier is the main uplink component carrier, user equipment, from its failure to acquire uplink synchronization on the main component carrier, may declare a downlink failure. radio (RLF). RLF may be appropriate when uplink control information cannot be transmitted. Where the selected uplink component carrier is not the main uplink component carrier, from its failure to acquire uplink synchronization on the selected component carrier, the user equipment may attempt a random access procedure on some or all the remaining uplink component carriers. In one example, the user equipment only initiates the random access procedure on those uplink component carriers that are associated with trusted downlink component carriers. In another example, the user equipment further initiates the random access procedure on all configured component carriers (including the main uplink component carrier). If all component carriers are exhausted without achieving uplink synchronization, a radio link failure may be declared.
[000112] Figure 11 illustrates a set of exemplary operations 1100 that can be performed to enable a contention-based random access procedure. The operations 1100 of Figure 11 can be performed, for example, through a user equipment in a wireless communication network. Such user equipment may be configured to operate with some uplink and/or downlink component carriers. At 1102, an uplink component carrier for transmitting a random access request is chosen by the user equipment. At 1104, the random access request is transmitted on a selected uplink component carrier. Such a request is received by a network entity, such as an eNodeB. At 1106, a response to the random access request is received by the user equipment. Such a response is received on a first downlink component carrier which is linked to the selected uplink component carrier.
[000113] Figure 12 illustrates a set of exemplary operations 1200 that can be performed to enable a contention-based random access process. The operations 1200 of Figure 12 can be performed, for example, through an eNodeB in a wireless communication network. The eNodeB can be in communication with one or more user equipment in wireless communication. At 1202, several component carriers are configured for use by a user equipment. Such component carriers may include uplink and downlink component carriers for which each uplink component carrier is associated with at least one downlink component carrier. At 1204, a random access request is received from user equipment on a first uplink component carrier, where the first uplink component carrier has been identified by the user equipment. At 1206, a response is transmitted to user equipment on a first downlink component carrier. The first downlink component carrier may be linked to the first uplink component carrier.
[000114] In one example, a downlink main carrier and an associated uplink main component carrier are selected for random access operations. Such binding can be performed, for example, through SIB2 signaling. In this case, the procedure for handling an unreliable downlink component carrier is simplified, since user equipment can simply declare a radio link failure from the determination that the downlink component carrier is unreliable. Furthermore, in a dispute-free random access procedure, the need to include additional indicators to identify a specific uplink component carrier is diminished.
[000115] On the other hand, the selection of a main downlink component carrier and its associated main uplink component carrier may warrant additional considerations when used, for example, in heterogeneous network (HetNet) installations. As noted in connection with Figure 8, in a HetNet installation, low power cells can be combined with higher power cells to improve network coverage and increase network capacity. In such installations, the downlink component carriers may not be equivalent from the perspective of each cell, while the uplink component carriers may be equivalent. For example, the transmit power level associated with the macrocell may be lower on a downlink component carrier. Under such circumstances, a single downlink component carrier, that is, the range-expanding component carrier, can be used by various user equipment as the main downlink component carrier. While the use of an individual downlink component carrier may be justified due to the superior quality of a specific downlink component carrier, it may be desirable to distribute uplink transmissions between different uplink component carriers of similar quality. However, if there is only one uplink component carrier linked (e.g. via SIB2) with the main downlink component carrier, all user equipment will have to use the same uplink component carrier, leading to data congestion and load imbalance.
[000116] In some embodiments, the problems cited above can be alleviated by implementing a specific user equipment link of downlink and uplink component carriers. The specific UE link, which can override the SIB2 link, allows multiple uplink component carriers to be used by different user equipment (or groups of user equipment). In an exemplary scenario, when a user equipment is first connected to the network, it obtains the SIB2 link between the downlink and uplink component carriers. However, in a subsequent operation, the eNodeB can reconfigure the component carriers and provide the specific UE binding for each user equipment.
[000117] Figure 13 illustrates an exemplary specific UE binding. As shown in Figure 13, a main downlink component carrier (i.e., CC2 of DL) can be connected to a first uplink component carrier (i.e., CC1 of UL) for a first group of user equipment (UEs). 1 to M), while a second uplink component carrier (i.e. CC2 of UL) is connected to a second group of UEs (UEs 1 to K) via SIB2 link. In one example, in the context of the heterogeneous network of Figure 8, the main downlink component carrier that is illustrated in Figure 13 is the range-expanding component carrier.
[000118] The specific UE link can cancel the SIB2 link for some of the user equipment. Such a new binding may, however, create ambiguities in a contention-based random access procedure since the eNodeB may not know which specific user equipment initiated the random access process. As such, there may be ambiguity as to which downlink carrier should be used to send the response to the random access request. Specific component carrier RACH resources can be defined to resolve this ambiguity. RACH resources can include, but are not limited to, time, frequency, and subscription values. In this case, the use of a specific RACH resource by the user equipment may signal a specific downlink component carrier for transmission of the reply. For example, an uplink component carrier may have RACH resources corresponding to the downlink component carrier linked to SIB2, as well as RACH resources corresponding to the range-expanding downlink component carrier. Specific component carrier RACH resources can be routed to user equipment via dedicated RRC signaling.
[000119] Figure 14 illustrates an exemplary system 1400, capable of supporting the various operations described above. Similar to Figure 4, system 1400 includes an eNodeB (eNB) 1450 that can transmit and/or receive information, signals, data, instructions, commands, bits, symbols, and the like. Figure 4 also illustrates a user equipment 1410, which is in communication with the eNB 1450 using "component 1 carrier" 1420 to "component N carrier" 1440. User equipment 1410 can transmit and/or receive information, signals, data , instructions, commands, bits, symbols, and the like. In addition, although not shown, system 1400 may include additional base stations and/or user equipment.
[000120] In some embodiments, the 1450 eNB may include a 1452 component carrier configuration/activation component that enables one or more component carriers to be configured and activated for use by one or more user equipment. The eNB 1450 further includes a carrier selection component, downlink component 1454, a random access message receiving component 1456, a random access response generating component 1458, and a random access response receiving component 1460. The eNB 1450 additionally includes receive and transmit components (not shown), which enable the eNB 1450 to transmit signals on the downlink component carriers 1432, 1442 and receive signals on the uplink component carriers 1434, 1444.
[000121] User equipment 1410 of Figure 14 includes an uplink component carrier selection component 1412, which allows user equipment 1410 to select an uplink component carrier from among several component carriers to transmit an access message random based on the association between the uplink and downlink component carriers. User equipment 1410 further includes a random access message generating component 1414 that allows user equipment 1410 to generate a random access message in response to receipt of a random access request in a dispute-free random access procedure. . Additionally, user equipment 1410 includes a random access request generation component 1416 that allows user equipment 1410 to generate a random access request in a contention-based random access procedure. The random access response receiving component 1418 that is illustrated in Figure 14 enables user equipment 1410 to receive a random access response. The random access response receiving component 1418 may be configured to receive a response in a contention-based random access procedure, and/or in a contention-based random access procedure.
[000122] Figure 15 illustrates an apparatus 1500 within which the various described modalities can be implemented. Particularly, the equipment 1500 that is shown in Figure 15 may comprise at least a portion of a base station or at least a portion of a user equipment (such as the eNB 1450 and user equipment 1410 that are illustrated in Figure 14) and/or at least a portion of a transmitter system or a receiver system (such as the transmitter system 210 and the receiver system 250 which are illustrated in Figure 2). The equipment 1500 that is illustrated in Figure 15 may be resident within a wireless network and receive incoming data via, for example, one or more receivers and/or the appropriate receiving and decoding circuitry (e.g. (e.g. antennas, transceivers, demodulators and the like). The equipment 1500 that is illustrated in Figure 15 may also transmit output data via, for example, one or more transmitters and/or appropriate encoding and transmission circuitry (e.g., antennas, transceivers, modulators, and similar). Additionally, or alternatively, the equipment 1500 that is illustrated in Figure 15 may reside in a wired network.
[000123] Figure 15 further illustrates that equipment 1500 may include a memory 1502 that may hold instructions to perform one or more operations, such as signal conditioning, analysis, and the like. Additionally, the apparatus 1500 of Figure 15 may include a processor 1504 that may execute instructions that are stored in memory 1502 and/or instructions that are received from another device. The instructions may refer, for example, to the configuration or operation of the 1500 equipment or related communication equipment. It should be noted that although the memory 1502 that is illustrated in Figure 15 is shown as a single block, it may comprise two or more separate memories that constitute separate physical and/or logical units. Furthermore, the memory while being communicatively connected to the processor 1504, may reside wholly or partially outside the equipment 1500 which is illustrated in Figure 15. It should also be understood that one or more components, such as the various components associated with the eNodeB 1450 and user component 1410 which are shown in Figure 14, may exist within a memory such as memory 1502.
[000124] It should be noted that for the sake of simplicity of explanation, the operations in Figures 9 to 12 are shown and described as a series of actions. However, it should be understood and considered that the methodologies are not limited by the order of the actions, since some actions may, according to one or more modalities, occur in different orders and/or simultaneously with other actions from those shown here. and described. For example, those skilled in the art will understand and appreciate that the methodology could alternatively be represented as a series of interrelated states or events, such as in a state diagram. Furthermore, not all the actions illustrated may be required to implement a methodology according to the described modalities.
[000125] It will be appreciated that memories which are described in connection with the described embodiments may be either volatile memory or non-volatile memory, or may include both volatile memory and non-volatile memory. By way of illustration, and not by way of limitation, non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM), which acts as external cache memory. As an illustration and not as a limitation, RAM is available in many forms such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).
[000126] It should also be noted that the equipment 1500 of Figure 15 can be employed with a user equipment or mobile device, and can be, for example, a module such as an SD card, a network card, a wireless network, a computer (including laptops, desktop computers, personal digital assistants PDAs), mobile phones, smart phones, or any other suitable terminal that can be used to access a network. User equipment accesses the network through an access component (not shown). In one example, a connection between the user equipment and the access components may be wireless in nature, where the access components may be the base station and the user equipment is a wireless terminal. For example, the terminal and base stations may communicate over any suitable wireless protocol including, but not limited to, Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), (FDMA), Orthogonal Frequency Division Multiplexing (OFDM), FLASH OFDM, Orthogonal Frequency Division Multiple Access (OFDMA) or any other suitable protocol.
[000127] The access components can be an access node associated with a wired network or with a wireless network. For this purpose, the access components can be, for example, a router, a switch and the like. The access component may include one or more interfaces, for example communication modules, for communicating with other network nodes. Additionally, the access component may be a base station (or wireless access point) in a cellular-type network, where base stations (or wireless access points) are used to provide wireless coverage areas for a plurality of subscribers. Such base stations (or wireless access points) may be arranged to provide contiguous areas of coverage for one or more cellular telephones and/or other wireless terminals.
[000128] It should be understood that the modalities and features described here can be implemented by hardware, software, firmware or any combination thereof. Various embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embedded in a computer-readable medium, including computer-executable instructions, such as program code, performed by computers in networked environments. As noted above, memory and/or computer readable media may include removable and non-removable storage devices including, but not limited to, Readable Memory (ROM), Random Access Memory (RAM), Compact Disks (CDs), Digital Versatile Discs (DVD) and the like. Therefore, the described modalities can be implemented on non-transient computer readable media, when implemented in software, the functions can be stored or transmitted through one or more instructions or code on a computer readable medium. Computer readable media include computer storage media and communication media including any media that facilitates the transfer of a computer program from one place to another. A storage medium can be any available media that can be accessed by a computer. By way of example, and not by way of limitation, such computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage medium, magnetic disk storage medium or other magnetic storage devices, or any other means that can be used to carry out or store desired program code in the form of instructions or data structures and that can be accessed by a common-use or special-purpose computer, or by a common-use or special-purpose processor.
[000129] Furthermore, any connection is appropriately termed a computer-readable medium. For example, if software is transmitted from a network site, server, or other remote source using an axial cable, fiber optic cable, twisted-pair, digital subscriber line (DSL), then coaxial cable, fiber optic cable, twisted-pair wire, or DSL are included in the definition of medium. Magnetic disc and optical disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, Blu-ray disc, where magnetic discs normally reproduce data magnetically, while optical discs reproduce data optically with lasers. Combination of the above must also be included in the scope of computer readable media.
[000130] Generally, program modules can include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. Computer executable instructions, data structures, associates, and program modules represent examples of program code for performing steps of the methods disclosed herein. The specific sequence of such executable statements or associated data structures represents examples of corresponding actions to implement the functions described in such steps or processes.
[000131] The various illustrative logic blocks, modules, and circuits described in connection with the present description may be implemented or realized with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC) , an array of field programmed gates (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors together with a DSP core, or any other such configuration. Additionally, at least one processor may comprise one or more modules operable to perform one or more of the steps and/or actions written above.
[000132] For a software implementation, the techniques described here can be implemented with modules (eg, procedures, functions, and so on) that perform the functions described here. Software codes can be stored in memory units and executed by processors. The memory unit may be implemented within the processor and/or external to the processor, in which case it may be communicatively coupled to the processor through various means as known in the art. Furthermore, at least one processor may include one or more modules operable to perform the functions described herein.
[000133] The techniques described here can be used by various wireless communication systems such as (CDMA), (TDMA), (FDMA), (OFDMA), (SC-FDMA), and other systems. The terms “system” and “network” are often used interchangeably. A CDMA system may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Broadband CDMA (W-CDMA) and other variants of CDMA. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system can implement a radio technology such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (WiFi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. UTRA and E-UTRA form part of the Universal Mobile Telecommunications System (UMTS). Long Term Evolution (LTE) is an upcoming version of UMTS that uses E-UTRA, which employs OFDMA on the downlink and SC-FDMA on the uplink. UTRA, E-UTRA, GSM, UMTS, LTE and GSM are described in documents from an organization called “3rd Generation Partnership Project” (3GPP). Additionally CDMA2000 and (UMB) are described in documents from an organization called “3rd Generation Partnership Project 2” (3GPP2). Additionally, such wireless communication systems may additionally include ad hoc non-hierarchical (e.g. user equipment/user equipment) network systems often utilizing unlicensed, unpaired spectrums, 802.xx wireless LAN, BLUETOOTH and any other wireless communication techniques, short-range or long-range. The described embodiments can also be used in conjunction with systems using multiple component carriers. For example, the described modalities can be used in conjunction with LTE-A systems.
[000134] Single Carrier Frequency Division Multiple Access (SC-FDMA) uses single carrier modulation and frequency domain equalization. SC-FDMA has similar performance and essentially the same overall complexity as those of an OFDMA system. An SC-FDMA signal has a lower maximum-to-average capacity ratio (PAPR) due to its inherent single carrier structure. SC-FDMA can be used, for example, in uplink communications where lower PAPR greatly benefits access terminals in terms of transmission capacity efficiency.
[000135] In addition, several aspects or characteristics described here can be implemented as a method, equipment, an industrial product using standard programming and/or engineering techniques. The term "industrial product" as used herein is intended to encompass a computer program that can be accessed from any computer-readable device, carrier, or media. For example, computer readable media may include, but are not limited to, magnetic storage devices (e.g. hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g. laser disk (CD), digital disk (DVD), etc.), smart cards, and flash memory devices (e.g. card, stick, keypad, etc.). Additionally, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or transporting instruction (instructions) and/or data. Additionally, a computer program product may include computer readable medium that has one or more instructions or code operable to cause a computer to perform the functions described herein.
[000136] Additionally, the steps and/or actions of a method or algorithm described in connection with the aspects disclosed herein may be incorporated directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM or any other form of storage medium known in the art. An exemplary storage medium may be coupled to the processor such that the processor can read information from the storage medium and write information thereon. Alternatively, the storage medium may be integral to the processor. Additionally, in some embodiments, the processor and storage medium may reside in an ASIC. Additionally, the ASIC can reside on user equipment (eg 1410, Figure 14). Alternatively, the processor and storage medium may reside as discrete components in user equipment (eg, 1410, Figure 14). Additionally, in some embodiments, the steps and/or actions of a method or algorithm may reside as one, or as any combination or set of codes and/or instructions on a machine-readable and/or computer-readable medium, which can be embedded in a computer program product.
[000137] While the preceding description discusses illustrative embodiments, it should be noted that various changes and modifications could be made therein without departing from the scope of the described embodiments as defined by the appended claims. Accordingly, the embodiments described are intended to encompass all such alterations, modifications and variations within the scope of the appended claims. Furthermore, while elements of the described embodiments may be described or claimed in the singular, the plural is considered unless limitation to the singular is explicitly stated. Additionally, all or a portion of any embodiment may be used with all or a portion of any other embodiments, unless otherwise stated.
[000138] To the extent that the term "includes" is used either in the detailed description or in the claims, such term is intended to be inclusive in a similar manner to the term "comprising" as "comprising" is interpreted when used as a transition word in a claim. Furthermore, the term "or" as used either in the detailed description or in the claims is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified, or evident from the context, the phrase "X employs A or B" is intended to mean any of the natural inclusive permutations. That is, the sentence "X employs A or B" is satisfied by any of the following instances: X employs A; X employs B; or X employs both A and B. Furthermore, the articles "a" and "an" as used in this application and the appended claims are generally to be taken to mean "one or more" unless otherwise specified or evident from context to refer to a singular form.

权利要求:
Claims (15)
[0001]
1. Method for wireless communication, characterized in that it comprises the steps of: receiving (902) a request (706) for a random access procedure in a user equipment (702) in a wireless communication network (300 ), wherein the user equipment (702) is configured to operate with a plurality of component carriers (430-440; 1430-1440) comprising uplink and downlink component carriers of the wireless communication network (300), wherein the plurality of component carriers (430-440; 1430-1440) includes a primary uplink component carrier and one or more secondary uplink component carriers, and wherein the request (706) is received on a first component carrier of downlink the plurality of component carriers; selecting (904) an uplink component carrier from among the plurality of component carriers (430; 440; 1430; 1440) to transmit a random access message (708) based on an association between the uplink and downlink component carriers , the selection comprising: a) selecting an uplink component carrier based on specific user equipment signaling that links the first downlink component carrier to the selected uplink component carrier; or otherwise b) select, in the absence of specific user equipment signaling linking the first downlink component carrier to the selected uplink component carrier, an uplink component carrier based on an association between the downlink component carrier selected uplink and the first downlink component carrier as specified by signaling system information block 2 (SIB2), wherein the use of a) or b) is dependent on the signaling received by the user equipment; transmit (906) the random access message (708) on the selected uplink component carrier; and receiving (908) a response (710) to the transmitted random access message (708).
[0002]
2. Method according to claim 1, characterized in that selecting an uplink component carrier based on an association between the selected uplink component carrier and the first downlink component carrier as specified by SIB2 comprises selecting the primary uplink component carrier, wherein the association occurs between the primary uplink component carrier and the first downlink component carrier.
[0003]
3. Method according to claim 1, characterized in that the first downlink component carrier is associated with the primary uplink component carrier.
[0004]
A method according to claim 1, characterized in that selecting an uplink component carrier based on an association between the uplink component carrier and the first downlink component carrier as specified by block signaling System information 2 (SIB2) comprises selecting a secondary uplink component carrier, wherein the association occurs between the secondary uplink component carrier and the first downlink component carrier.
[0005]
5. Method according to claim 4, characterized in that the first downlink component carrier is a range-expanding component carrier.
[0006]
6. Method according to claim 1, characterized in that receiving (908) a response (710) to the transmitted random access message (708) comprises receiving (908) a response (710) to the transmitted random access message (710). (708) on the first downlink component carrier.
[0007]
7. Method for wireless communication, characterized in that it comprises: configuring (1002) a plurality of component carriers (430; 440; 1430; 1440) for use by a user equipment (702) in a wireless communication network (300), wherein the plurality of component carriers (430; 440; 1430; 1440) comprises uplink and downlink component carriers, the plurality of component carriers (430; 440; 1430; 1440) including a component carrier of primary uplink and one or more secondary uplink component carriers, and wherein each uplink component carrier is associated with at least one downlink component carrier; selecting (1004) a downlink component carrier and transmitting a request (706) for a random access procedure to user equipment (702) on the selected downlink component carrier; receive (1006) a random access message (708) from user equipment (702) on an uplink component carrier from among the plurality of component carriers (430; 440; 1430; 1440), wherein the component carrier of uplink is identified by the user equipment either a) based on specific user equipment signaling that links the selected downlink component carrier to the identified uplink component carrier or otherwise (b) based on an association between the identified uplink component carrier and the selected downlink component carrier as specified by System Information Block 2 (SIB2) signaling, wherein the use of a) or b) is dependent on the signaling received by the user equipment; and transmitting (1008) a response (710) to the user equipment (702).
[0008]
8. Method according to claim 7, characterized in that in the case where the selected uplink component carrier is identified by the user equipment based on an association between the selected uplink component carrier and the component carrier selected downlink component carrier as specified by signaling system information block 2 (SIB2), the selected uplink component carrier is the primary uplink component carrier, wherein the association occurs between the primary uplink component carrier and the downlink component carrier selected.
[0009]
9. Method according to claim 8, characterized in that: the random access message is received on the primary uplink component carrier.
[0010]
10. Method according to claim 7, characterized in that in the case where the selected uplink component carrier is identified by the user equipment based on specific user equipment signaling that links the downlink component carrier selected to the selected uplink component carrier, the selected uplink component carrier is a secondary uplink component carrier.
[0011]
11. Method according to claim 10, characterized in that the selected downlink component carrier is a range-expanding component carrier.
[0012]
12. Method according to claim 7, characterized in that transmitting (1008) a response (710) to the user equipment (702) comprises transmitting (1008) the response (710) to the user equipment (702) in the downlink component carrier selected.
[0013]
13. Wireless communication device, characterized in that it comprises: means for receiving a request for a random access procedure on a user equipment in a wireless communication network, where the user equipment is configured to operate with a plurality of component carriers comprising uplink and downlink component carriers of the wireless communication network, wherein the plurality of component carriers includes a primary uplink component carrier and one or more secondary uplink component carriers, and in that the request is received on a first downlink component carrier from among the plurality of component carriers; means for selecting an uplink component carrier from among the plurality of component carriers for transmitting a random access message, based on an association between the uplink component and downlink component carriers, the selection comprising: a) selecting an uplink component carrier uplink based on specific user equipment signaling that links the first downlink component carrier to the selected uplink component carrier; or, otherwise b) select, in the absence of specific user equipment signaling linking the first downlink component carrier to the selected uplink component carrier, an uplink component carrier based on an association between the downlink component carrier selected uplink and the first downlink component carrier as specified by signaling system information block 2 (SIB2), wherein the use of a) or b) is dependent on the signaling received by the user equipment; means for transmitting the random access message on the selected uplink component carrier; and means for receiving a response to the transmitted random access message.
[0014]
14. Wireless communication device, comprising: means for configuring a plurality of component carriers for use by a user equipment in a wireless communication network, wherein the plurality of component carriers comprises link component carriers uplink and downlink, wherein the plurality of carriers includes at least one primary uplink component carrier and one or more secondary component carriers, and wherein each uplink component carrier is associated with at least one downlink component carrier ; means for selecting a downlink component carrier; means for transmitting a request for a random access procedure to user equipment on the selected downlink component carrier; means for receiving a random access message from the user equipment on an uplink component carrier among the plurality of component carriers, wherein the uplink component carrier is identified by the user equipment a) on the basis of specific signaling of user equipment linking the selected downlink component carrier to the selected uplink component carrier, or otherwise b) in the absence of specific signaling from user equipment linking the first downlink component carrier to the uplink component carrier selected, based on an association between the identified uplink component carrier and the selected downlink component carrier as specified by signaling system information block 2 (SIB2) wherein the use of a) or b) is dependent on the signal received by user equipment io; and means for transmitting a response to the user equipment.
[0015]
15. Computer readable memory, characterized in that it contains the method as defined in any one of claims 1 to 6 or 7 to 12.

类似技术:

---

公开号 | 公开日 | 专利标题

---

BR112012023555B1|2022-02-01|Methods for wireless communication, wireless communication devices, and computer-readable memory

---

US20190305840A1|2019-10-03|New Radio Beam Failure Recovery Procedure Timing

---

EP2975897B1|2021-05-19|Uplink coordinated multipoint communications in a wireless network

---

JP2019532588A|2019-11-07|Extended random access channel | procedure

---

EP2443863B1|2018-01-03|Resource block reuse for coordinated multi-point transmission

---

US20190357238A1|2019-11-21|Cross-Carrier Scheduling with Multiple Active Bandwidth Parts

---

JP2013506383A|2013-02-21|Transport of control information

---

JP2013535863A|2013-09-12|Interaction between maximum power reduction and power scaling in wireless networks

---

RU2728525C1|2020-07-30|System and methods of configuring user equipment with pucch overlapping resources for transmitting scheduling requests

---

WO2011022567A1|2011-02-24|Communication system in which a length of a cyclic prefix portion of an information unit is adjusted to time-align the boundary of the information unit with the boundary of the adjacent information unit

---

US10856237B2|2020-12-01|Power control with multiple panels in a radio system

---

US10778318B2|2020-09-15|Bandwidth parts switching in beam failure recovery procedure

---

US20200204312A1|2020-06-25|Transmission Scheme for Multiple Transmission Reception Points in a Radio System

---

US20200350967A1|2020-11-05|Channel State Information Feedback for Multiple Transmission Reception Points

---

US20210320760A1|2021-10-14|HARQ Feedback Collision in Unlicensed Bands

---

US20220061031A1|2022-02-24|Beam-Based Downlink Monitoring

---

WO2021257778A1|2021-12-23|Coverage enhancement in a wireless system

---

WO2021257951A1|2021-12-23|Hybrid acknowledgement repeat request feedback repetition

---

WO2021030674A1|2021-02-18|Power control in carrier aggregation with multiple transmission reception points

---

BR112012006998B1|2021-11-23|METHODS AND APPARATUS TO FACILITATE CONFIGURATION AND ALLOCATION OF CONTROL INFORMATION AND COMPUTER-READABLE MEMORY

同族专利:

---

公开号 | 公开日

---

WO2011116242A1|2011-09-22|

---

JP5763167B2|2015-08-12|

---

JP2013523025A|2013-06-13|

---

KR20120139820A|2012-12-27|

---

KR101488269B1|2015-01-30|

---

EP2548402A1|2013-01-23|

---

CN102804901B|2016-01-27|

---

TW201204149A|2012-01-16|

---

CN102804901A|2012-11-28|

---

BR112012023555A2|2018-06-05|

---

ES2886056T3|2021-12-16|

---

EP2548402B1|2021-08-11|

---

US20120063302A1|2012-03-15|

---

TWI530221B|2016-04-11|

---

US8917593B2|2014-12-23|

引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

---

US8588150B2|2008-08-07|2013-11-19|Qualcomm Incorporated|RNTI-dependent scrambling sequence initialization|

---

WO2010019009A2|2008-08-13|2010-02-18|Electronics And Telecommunications Research Institute|Communication system using carrier aggregation, and base station and terminal included in the communication system|

---

KR101238610B1|2008-09-04|2013-02-28|샤프 가부시키가이샤|Mobile communication system, base station device, mobile station device, and communication method|

---

CN101478824B|2009-02-02|2015-05-13|中兴通讯股份有限公司|Method and base station for identifying downlink component carrier in random access process|

---

CN101646234A|2009-09-01|2010-02-10|中兴通讯股份有限公司|Obtaining method of timing lead|

---

US20110159867A1|2009-12-24|2011-06-30|Richard Lee-Chee Kuo|Method and apparatus to allocate random access channel resources for carrier aggregation in a wireless communication network|

---

KR101807874B1|2010-03-05|2017-12-12|엘지전자 주식회사|Method and apparatus of transmitting aperiodic sounding reference signal in wireless communication system|KR101646282B1|2010-03-29|2016-08-08|엘지전자 주식회사|Method and apparatus of transmitting data of machine type communication device in wireless communication system|

---

WO2011120432A1|2010-03-31|2011-10-06|Huawei Technologies Co., Ltd.|Method and apparatus of communication|

---

KR101831281B1|2010-04-06|2018-02-23|삼성전자주식회사|Device and method for handling scheduling information in wireless communication system|

---

US9014141B2|2010-04-29|2015-04-21|Electronics And Telecommunications Research Institute|Carrier-aggregation-based handover method|

---

CN102238552B|2010-04-30|2015-08-05|索尼公司|Select the method for composition carrier wave, base station, terminal and communication system|

---

JP4989746B2|2010-04-30|2012-08-01|株式会社エヌ・ティ・ティ・ドコモ|Mobile communication method and mobile station|

---

JP5265616B2|2010-05-18|2013-08-14|株式会社エヌ・ティ・ティ・ドコモ|Wireless communication system|

---

JP5552161B2|2010-05-19|2014-07-16|パナソニック株式会社|Terminal device and response signal transmission method|

---

CN105743631B|2010-12-06|2019-05-28|交互数字专利控股公司|Method for enabling radio operation in exempting from licensed spectrum|

---

CN103444106B|2011-03-18|2016-05-11|Lg电子株式会社|The method sending control information in wireless communication system and equipment thereof|

---

CN103460784A|2011-04-02|2013-12-18|瑞萨移动公司|Method, apparatus and computer program product for triggering the determination of a timing advance for one component carrier based upon another component carrier|

---

KR102073027B1|2011-04-05|2020-02-04|삼성전자 주식회사|Method and appratus of operating multiple time alignment timer in mobile communication system using carrier aggregation|

---

WO2012153961A2|2011-05-06|2012-11-15|엘지전자 주식회사|Method and apparatus for adjusting transmission timing in wireless access system supporting carrier aggregation|

---

KR101731356B1|2011-06-23|2017-04-28|엘지전자 주식회사|Dual mode mobile terminal in mino wireless communication system and controlling method therefor|

---

US8369280B2|2011-07-01|2013-02-05|Ofinno Techologies, LLC|Control channels in multicarrier OFDM transmission|

---

US8582527B2|2011-07-01|2013-11-12|Ofinno Technologies, Llc|Hybrid automatic repeat request in multicarrier systems|

---

EP2564611B1|2011-07-01|2015-02-18|Ofinno Technologies, LLC|Synchronization signal and control messages in multicarrier OFDM|

---

WO2013006111A1|2011-07-06|2013-01-10|Telefonaktiebolaget L M Ericsson |Random access with primary and secondary component carrier communications|

---

US8395985B2|2011-07-25|2013-03-12|Ofinno Technologies, Llc|Time alignment in multicarrier OFDM network|

---

EP2728771A4|2011-08-12|2015-03-11|Lg Electronics Inc|Method of performing a random access process and wireless device using same|

---

CN103733718B|2011-08-19|2018-04-13|Sca艾普拉控股有限公司|Wireless communication system and method|

---

US9203592B2|2011-09-29|2015-12-01|Kyocera Corporation|Mobile communication system, base station, and user terminal|

---

WO2013049505A1|2011-09-30|2013-04-04|Kyocera Corporation|Systems and methods for small cell uplink interference mitigation|

---

CN102355733B|2011-09-30|2017-09-26|中兴通讯股份有限公司|The sending method and user equipment of a kind of Physical Uplink Control Channel|

---

JP5162699B1|2011-10-04|2013-03-13|シャープ株式会社|Mobile station apparatus, base station apparatus, radio communication method, radio communication system, and integrated circuit|

---

US8446844B1|2011-12-04|2013-05-21|Ofinno Technologies, Llc|Handover in multicarrier wireless networks|

---

US9768923B2|2011-12-20|2017-09-19|Lg Electronics Inc.|Method and apparatus for acquiring uplink synchronization in wireless communication system|

---

US9609675B2|2012-01-16|2017-03-28|Lg Electronics Inc.|Method and apparatus for monitoring control channel|

---

US9094988B2|2012-01-17|2015-07-28|Qualcomm Incorporated|Method and apparatus for performing random access on a secondary carrier|

---

KR101995430B1|2012-01-20|2019-07-02|엘지전자 주식회사|Method of sending/receiving control information and device therefor|

---

US9237537B2|2012-01-25|2016-01-12|Ofinno Technologies, Llc|Random access process in a multicarrier base station and wireless device|

---

US8995405B2|2012-01-25|2015-03-31|Ofinno Technologies, Llc|Pathloss reference configuration in a wireless device and base station|

---

US8526389B2|2012-01-25|2013-09-03|Ofinno Technologies, Llc|Power scaling in multicarrier wireless device|

---

KR101596610B1|2012-01-29|2016-02-22|엘지전자 주식회사|Method for controlling uplink transmission power and wireless device using same|

---

US9497756B2|2012-03-25|2016-11-15|Comcast Cable Communications, Llc|Base station radio resource management|

---

EP2835023B1|2012-04-01|2021-09-01|Comcast Cable Communications, LLC|Cell group configuration in a wireless device and base stationwith timing advance groups|

---

US20130259008A1|2012-04-01|2013-10-03|Esmael Hejazi Dinan|Random Access Response Process in a Wireless Communications|

---

US8995381B2|2012-04-16|2015-03-31|Ofinno Technologies, Llc|Power control in a wireless device|

---

US11252679B2|2012-04-16|2022-02-15|Comcast Cable Communications, Llc|Signal transmission power adjustment in a wireless device|

---

US8964593B2|2012-04-16|2015-02-24|Ofinno Technologies, Llc|Wireless device transmission power|

---

US9179425B2|2012-04-17|2015-11-03|Ofinno Technologies, Llc|Transmit power control in multicarrier communications|

---

US9210664B2|2012-04-17|2015-12-08|Ofinno Technologies. LLC|Preamble transmission in a wireless device|

---

US8964683B2|2012-04-20|2015-02-24|Ofinno Technologies, Llc|Sounding signal in a multicarrier wireless device|

---

US9949265B2|2012-05-04|2018-04-17|Comcast Cable Communications, Llc|Control channel in a wireless communication system|

---

US9801209B2|2012-05-09|2017-10-24|Lg Electronics Inc.|Method for transmitting random access preamble, and wireless device|

---

WO2013181810A1|2012-06-06|2013-12-12|华为技术有限公司|Multiple access method, device and system|

---

US8971298B2|2012-06-18|2015-03-03|Ofinno Technologies, Llc|Wireless device connection to an application server|

---

US9107206B2|2012-06-18|2015-08-11|Ofinne Technologies, LLC|Carrier grouping in multicarrier wireless networks|

---

US9179457B2|2012-06-20|2015-11-03|Ofinno Technologies, Llc|Carrier configuration in wireless networks|

---

US9084228B2|2012-06-20|2015-07-14|Ofinno Technologies, Llc|Automobile communication device|

---

US9113387B2|2012-06-20|2015-08-18|Ofinno Technologies, Llc|Handover signalling in wireless networks|

---

US9210619B2|2012-06-20|2015-12-08|Ofinno Technologies, Llc|Signalling mechanisms for wireless device handover|

---

US9210673B2|2012-09-06|2015-12-08|Apple Inc.|Recovery from uplink timing alignment failures in cellular communications|

---

US9008049B2|2012-09-11|2015-04-14|Qualcomm Incorporated|Forward link frame generation in a machine-to-machinewireless wide area network |

---

US20150237655A1|2012-10-23|2015-08-20|Telefonaktiebolaget L M Ericsson |Method, user equipment and base stations for performing random access procedures|

---

ES2782508T3|2012-11-13|2020-09-15|Ericsson Telefon Ab L M|Method and apparatus for activating the specific operating mode for terminals operating in extended long range|

---

HUE043450T2|2012-11-13|2019-08-28|Ericsson Telefon Ab L M|Method for modifying parameter values for long range extension, corresponding memory and wireless device|

---

EP2925066A4|2012-11-22|2015-12-09|Fujitsu Ltd|Base station apparatus, radio communication system, radio communication control method, and radio communication control program|

---

WO2014082215A1|2012-11-28|2014-06-05|华为技术有限公司|Multi-carrier configuration in fdd system, user equipment access method and corresponding apparatus|

---

US9468022B2|2012-12-26|2016-10-11|Samsung Electronics Co., Ltd.|Method and apparatus for random access in communication system with large number of antennas|

---

CN105493580B|2013-02-28|2019-04-12|索尼公司|User equipment, program and communication control method|

---

KR102044002B1|2013-05-09|2019-12-02|한국전자통신연구원|Dedicated channel establishment method for high speed data transmission in railway wireless sensor network|

---

US9537796B2|2013-06-19|2017-01-03|Blackberry Limited|Method and apparatus for supporting a communication service|

---

CN104348570B|2013-07-23|2019-01-04|电信科学技术研究院|A kind of uplink control information transmission method and device|

---

WO2015018044A1|2013-08-08|2015-02-12|Telefonaktiebolaget L M Ericsson |Methods and devices for random access|

---

CN105765895B|2013-11-25|2019-05-17|诺基亚技术有限公司|The device and method communicated using time shift subband|

---

US9603074B2|2013-12-16|2017-03-21|Apple Inc.|Systems and methods for carrier channel selection in carrier aggregation enabled networks|

---

US9615344B2|2013-12-19|2017-04-04|Qualcomm Incorporated|Enhanced random access procedure for air-to-ground communications|

---

US10009926B2|2014-07-11|2018-06-26|Qualcomm Incorporated|Methods and apparatus for connectionless access|

---

KR101658884B1|2015-03-31|2016-09-22|성균관대학교산학협력단|Transmission range expansion method of base station and base station apparatus using said method|

---

US10624119B2|2015-04-08|2020-04-14|Qualcomm Incorporated|Transmission scheduling for contention based carrier|

---

US10477574B2|2015-04-10|2019-11-12|Lg Electronics Inc.|Method and apparatus for performing contention based random access procedure over contention free random access procedure in wireless communication system|

---

US10123356B2|2015-04-27|2018-11-06|Telefonaktiebolaget Lm Ericsson |Robust selection of PRACH repetition level for MTC enhanced coverage|

---

US10285117B2|2015-05-21|2019-05-07|Qualcomm Incorporated|Techniques for coexistence between enhanced component carrier communications and non-enhanced component carrier communications|

---

CN107615843B|2015-06-24|2020-08-07|华为技术有限公司|Method and device for transmitting uplink data|

---

ES2749918T3|2015-09-28|2020-03-24|Ericsson Telefon Ab L M|Random access preamble to minimize PA rollback|

---

KR101706629B1|2016-01-25|2017-02-16|주식회사 이노와이어리스|power calibration method for MIMO-OFDM transmitter|

---

US10334519B2|2016-04-22|2019-06-25|Qualcomm Incorporated|Chirp signal formats and techniques|

---

RU2716741C1|2016-06-30|2020-03-16|Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд.|Method and apparatus for transmitting system information|

---

US10368373B2|2016-07-25|2019-07-30|Qualcomm Incorporated|Beam selection and refinement during a random access channelprocedure|

---

CN109565879A|2016-08-12|2019-04-02|瑞典爱立信有限公司|Carrier wave for random access configures|

---

EP3513586A1|2016-09-13|2019-07-24|Nokia Technologies Oy|Pdcp count handling in rrc connection resume|

---

US10171138B2|2016-09-30|2019-01-01|Nokia Technologies Oy|Indicating optional parameter groups|

---

EP3533257B1|2016-10-27|2020-07-29|Telefonaktiebolaget LM Ericsson |Neighbor relation establishment in wireless communications networks|

---

US11191102B2|2016-11-11|2021-11-30|Telefonaktiebolaget Lm Ericsson |Random-access procedure|

---

KR101875285B1|2016-11-16|2018-08-02|연세대학교 산학협력단|Method for random access in wireless communication system|

---

US10848238B1|2017-02-13|2020-11-24|Lockheed Martin Corporation|Evolved packet system over non-LTE radio access network|

---

CN110463331A|2017-03-24|2019-11-15|华为技术有限公司|Accidental access method, device, equipment and storage medium|

---

CN108632010B|2017-03-25|2021-06-08|华为技术有限公司|Wireless communication method, device and system|

---

US10419197B2|2017-04-27|2019-09-17|Qualcomm Incorporated|Sharing of long-term evolutionuplink spectrum|

---

US10285176B1|2017-04-28|2019-05-07|Sprint Communications Company L.P.|Wireless access point optimization of carrier aggregation using beamforming|

---

WO2018203680A1|2017-05-04|2018-11-08|엘지전자|Method for transmitting and receiving signal by means of beam in wireless communication system, and apparatus for said method|

---

US10524294B2|2017-05-04|2019-12-31|Ofinno, Llc|Scheduling request transmission|

---

TWI683589B|2017-08-18|2020-01-21|華碩電腦股份有限公司|Method and apparatus for random access configuration in a wireless communication system|

---

KR20200062332A|2017-11-08|2020-06-03|엘지전자 주식회사|Method and apparatus for transmitting message for performing random access procedure in wireless communication system|

---

JP2021503260A|2017-11-15|2021-02-04|ノキア テクノロジーズ オサケユイチア|Random access by bandwidth switching|

---

JP2021503755A|2017-11-16|2021-02-12|テレフオンアクチーボラゲット エルエム エリクソン（パブル）|Methods and devices for random access|

---

CN109803439B|2017-11-16|2021-06-08|维沃移动通信有限公司|Random access method and equipment|

---

CN111132332A|2018-10-31|2020-05-08|华硕电脑股份有限公司|Method and apparatus for transmitting using preconfigured uplink resources|

---

US11115989B1|2019-12-09|2021-09-07|Sprint Communications Company L.P.|Primary component carrier selection in a wireless access node that uses multiple radio frequency bands|

---

US11265878B1|2019-12-09|2022-03-01|Sprint Communications Company L.P.|Primary component carrier control in a wireless access node that uses multiple radio frequency bands|

法律状态:
2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

---

2020-05-12| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04W 74/08 Ipc: H04W 74/08 (2009.01), H04W 56/00 (2009.01) |

---

2020-05-12| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

---

2021-09-21| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

---

2021-11-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

---

2022-02-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 17/03/2011, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |

优先权:

---

申请号 | 申请日 | 专利标题

---

US31537210P| true| 2010-03-18|2010-03-18|

---

US61/315,372|2010-03-18|

---

US13/049,212|US8917593B2|2010-03-18|2011-03-16|Random access design in a multiple component carrier communication network|

---

US13/049,212|2011-03-16|

---

PCT/US2011/028899|WO2011116242A1|2010-03-18|2011-03-17|Random access design in a multiple component carrier communication network|

---