TERMINAL, BASE STATION, METHOD FOR TRANSMITTING A RESPONSE SIGNAL FROM A TERMINAL, METHOD FOR RECEIV

专利摘要:
terminal device and relay control method. The present invention relates to a terminal device and a retransmission control method that are provided, which make it possible to minimize increases in processing time on an uplink (pucch) control channel, even if a channel selection is used as the method for transmitting response signals during a carrier aggregation communication using a plurality of downlink unit bands. based on the uplink data generation status and error detection results obtained by a crc unit (211), a control unit (208) in the provided terminal (200) uses response signal transmission rules for control of transmitting the uplink response signals or control signals that indicate the generation of uplink data. if an uplink control signal and a response signal are generated simultaneously in the same transmission time unit, the control unit (208) will change the resources allocated to the response signal and/or the phase point of the response signal. according to the number and position of acks in the error detection result pattern.
公开号:BR112012009379B1
申请号:R112012009379-7
申请日:2010-08-03
公开日:2021-08-24
发明作者:Akihiko Nishio；Ayako Horiuchi；Daichi Imamura；Seigo Nakao
申请人:Sun Patent Trust；
IPC主号:

专利说明:

Technical Field
[0001] The present invention relates to a terminal apparatus and a method of retransmission control.
[0002] The long term evolution (LTE) of 3GPP adopts orthogonal frequency division multiple access (OFDMA) as a downlink communication scheme. In a radio communication system to which 3GPP LTE is applied, a base station transmits a sync signal (sync channel: SCH) and a broadcast signal (broadcast channel: BCH) using predetermined communication resources. A terminal first secures synchronization with the base station by capturing a SCH. Then, the terminal acquires parameters (eg, frequency bandwidth) specific to the base station by reading the BCH information (see Non-Patent Literatures 1, 2 and 3).
[0003] Furthermore, after completing the acquisition of the specific parameters for the base station, the terminal transmits a connection request to the base station and establishes a communication with the base station. The base station transmits control information to the terminal with which communication is established via a physical downlink control channel (PDCCH) as needed.
[0004] The terminal then makes a "blind decision" on each of a plurality of pieces of control information included in the received PDCCH signal. That is, the control information includes a cyclic redundancy check (CRC) portion, and this CRC portion is masked with a terminal ID of a transmit target terminal at the base station. Therefore, the terminal has difficulty in deciding whether or not the control information is addressed to its own terminal, until the CRC portion of the received control information is unmasked with the terminal's terminal ID. In blind decision, when an unmasking result represents that a CRC calculation is ok, it is determined that the control information is directed to its own endpoint.
[0005] Furthermore, in 3GPP LTE, an automatic repetition request (ARQ) is applied on downlink data from a base station to a terminal. That is, the terminal returns a response signal indicating a downlink data error detection result to the base station. The terminal performs a CRC on the downlink data, and returns an acknowledgment (ACK) when CRC = OK (no error) and a negative acknowledgment (NACK) when CRC = NG (error) to the base station as a response signal. A binary phase shift (BPSK) keying scheme is used for modulation of the response signal (ie, the ACK/NACK signal). In addition, an uplink control channel, such as a physical uplink control channel (PUCCH) is used to return the response signal. When the received reply signal represents NACK, the base station transmits relay data to the terminal.
[0006] Here, the control information transmitted from the base station includes a resource assignment information including a resource information and the like assigned from the base station to the terminal. The PDCCH is used for transmitting this control information as described above. The PDCCH is configured with one or more L1 / L2 control channels (L1 / L2 CCHs). Each CCH L1 / L2 is configured with one or more control channel elements (CCEs). That is, a CCE is a unit band for mapping control information to a PDCCH. Furthermore, when an L1/L2 CCH is configured with a plurality of CCEs, a plurality of CCEs whose indices are consecutive is assigned to the L1/L2 CCH. The base station assigns a CCH of L1/L2 to a resource assignment target terminal according to the number of CCEs required for notification of control information to the resource assignment target terminal. The base station then transmits the control information mapped to a physical resource corresponding to the CCE of the CCH of L1/L2.
[0007] Here, each CCE has a one-to-one correspondence with a PUCCH component resource. Therefore, the terminal that received the CCH of L1/L2 can implicitly specify a PUCCH component resource corresponding to the CCEs by setting the CCH of L1/L2, and transmits a response signal to the base station using the specified resource. This allows downlink communication resources to be used efficiently.
[0008] As illustrated in Figure 1, a plurality of response signals transmitted from a plurality of terminals is broadcast by a zero autocorrelation sequence (ZAC) having a zero autocorrelation characteristic, a Walsh sequence, and a sequence of discrete Fourier transform (DFT) on a time axis, and code multiplexed on the PUCCH. In Figure 1, (W0, W1, W2, W3) represents a Walsh sequence (which may also be referred to as "Walsh code sequence" or "Walsh code") having a sequence length of 4, and ( F0, F1, F2) represents a DFT sequence having a sequence length of 3. As illustrated in Fig. 1, at the terminal, an ACK or NACK response signal is first broadcast primarily to frequency components corresponding to a symbol multiple access system with single-carrier frequency division (1 SC-FDMA) on a frequency axis by a ZAC sequence (having a sequence length of 12). Thereafter, the response signal subjected to primary broadcast and the ZAC sequence functioning as a reference signal go through a secondary broadcast in association with a Walsh sequence (having a sequence length of 4: W0 to W3) and a sequence of DFT (having a string length of 3: F0 to F2) respectively. Furthermore, the signal subjected to secondary diffusion is transformed into a signal having a sequence length of 12 on the time axis by the inverse fast Fourier transform (IFFT). Then, a cyclic prefix (CP) is added to the signal that has been submitted to the IFFT, and thus a one-slot signal including 7 SC-FDMA symbols is generated.
[0009] Here, the response signals transmitted from different terminals are broadcast using sequences corresponding to different cyclic shift indices or orthogonal coverage (OC) indices (ie, a set of a Walsh sequence and a DFT sequence). Therefore, the base station can demultiplex a plurality of multiplexed code response signals using a conventional concentration process and a conventional correlation process (see Non-Patent Literature 4).
[00010] However, since each terminal makes a blind decision on a downlink assignment control signal in each subframe directed to its own terminal, the terminal side does not necessarily succeed in receiving the assignment control signal. of downlink. When the terminal fails to receive the downlink assignment control signal directed to its own terminal in a certain downlink unit band, the terminal has difficulty knowing whether or not there is downlink data directed to its own terminal, in the downlink unit band. Therefore, when it fails to receive the downlink assignment control signal in a certain downlink unit band, the terminal has difficulty in generating a response signal in the downlink data in the downlink unit band. This error case is defined as discontinuous transmission (DTX) of a response signal (DTX of ACK/NACK signals) in the sense that the terminal side does not transmit the response signal.
[00011] By the way, the uplink control channel (PUCCH) is also used for transmitting a scheduling request (SR) (which can also be represented by a scheduling request indicator (SRI)), a which is an uplink control signal indicating that uplink data to be transmitted from the terminal side has been generated. Once a connection to the terminal has been established, the base station individually allocates a resource to be used for SR transmission (hereafter referred to as an "SR resource") to each terminal. In addition, an on-off (OOK) switching scheme is applied to the SR, and the base station detects the SR from the terminal based on whether or not the terminal is transmitting an arbitrary signal using the SR feature. Furthermore, the SR is broadcast using a ZAC sequence, a Walsh sequence and a DFT sequence in the same manner as the response signal mentioned above.
[00012] In LTE system, the SR and the response signal can be generated in the same subframe. In this case, when the terminal multiplexes the code and transmits the SR and response signal, a peak-to-average power ratio (PAPR) of a synthesized waveform of a signal transmitted from the terminal deteriorates. significantly. However, in the LTE system, since the importance is placed on the amplification efficiency of the terminal, when the SR and the reply signal have been generated in the same subframe on the terminal side, the terminal transmits the reply signal (signals of response illustrated in Figures 2A to 2D) using the SR resource previously individually assigned to each terminal, without the use of a resource (referred to hereafter as an "ACK/NACK resource") used for the transmission of the response signal , as shown in Figure 2A.
[00013] That is, when the terminal side has only to transmit a response signal ("when only a response signal is transmitted" shown in Fig. 2C), the terminal transmits the response signal (a response signal shown in figure 2C) using the ACK/NACK feature. On the other hand, when the SR and the response signal have been generated in the same subframe on the terminal side ("when the response signal and the SR are transmitted" illustrated in Figure 2D), the terminal transmits the response signal (a response signal illustrated in Figure 2D) using the SR feature.
[00014] Thus, the PAPR of the synthesized waveform of the signal transmitted from the terminal can be reduced. At this time, the base station detects SR from the terminal based on whether or not the SR feature is being used. In addition, the base station determines whether or not the terminal has transmitted an ACK or NACK, based on a phase (i.e., a result of BPSK demodulation) of a signal transmitted via the SR resource (the ACK/NACK resource when the SR feature is not used).
[00015] Still, 3GPP LTE-Advanced standardization which realizes faster communication than 3GPP LTE has started. A 3GPP LTE-Advanced system (which may also be referred to hereafter as an "LTE-A system") follows the 3GPP LTE system (which may also be referred to hereinafter as the "LTE system" LTE"). In order to realize a downlink transmission rate of a maximum of 1 Gbps or above it is expected that 3GPP Advanced-LTE will introduce base stations and terminals capable of communicating on a broadband frequency of 40 MHz or above.
[00016] In an LTE-A system, in order to simultaneously perform a communication at an ultra-high baud rate several times as fast as a baud rate in the LTE system and a backwards compatibility with the LTE system, one-band for LTE-A system it is divided into "unit bands" of 20 MHz or less, which is a support bandwidth for LTE system. That is, the "unit band" here is a band that has a maximum width of 20 MHz and defined as a base unit of a communication band. Further, a "unitary band" in a downlink (referred to hereafter as a "unitary downlink band") may be defined as a band divided by the downlink frequency band information included in the BCH broadcast from of the base station, or a band defined by a dispersive width when the downlink control channel (PDCCH) is dispersed and arranged in the frequency domain. Further, a "unit band" in an uplink (referred to from this point as an "uplink unit band") may be defined as a band divided by the uplink frequency band information included in the BCH broadcast by the base station , or as a unit band of a communication band of 20 MHz or less, which includes a physical uplink shared channel (PUSCH) region near the center thereof and PUCCHs for LTE at both ends thereof. Furthermore, in LTE-Advanced 3GPP, "unit band" can also be expressed as "component carrier(s)" in English.
[00017] The LTE-A system supports a communication using a band that groups several unit bands, a so-called "carrier aggregation". Since transmission rate requirements for an uplink are generally different from transmission rate requirements for a downlink, in the LTE-A system, a carrier aggregation, in which the number of regulated unit bands for a terminal supporting an arbitrary LTE-A system (referred to hereafter as an "LTE-A endpoint") is different between the uplink and the downlink, a so-called "symmetric carrier aggregation" is being discussed. Cases are also supported where the number of unit bands is asymmetric between the uplink and the downlink, and different unit bands have different frequency bandwidths.
[00018] Figures 3A and 3B are diagrams illustrating a symmetric carrier aggregation applied to individual terminals and a control sequence thereof. Figures 3A and 3B illustrate an example in which a bandwidth and the number of unit bands are symmetric between an uplink and a downlink at a base station.
[00019] In Figure 3B, a regulation (configuration) is made for terminal 1, so that a carrier aggregation is performed using two unitary downlink bands and one unitary uplink band on the left side, while step that a regulation is made for terminal 2 so that, although the same two downlink unit bands as those at terminal 1 are used, the right side uplink unit band is used for uplink communication.
[00020] Focusing attention on terminal 1, signals are transmitted/received between an LTE-A base station and an LTE-A terminal configuring an LTE-A system according to a sequence diagram illustrated in figure 3B. As shown in Fig. 3A, (1) terminal 1 is synchronized with the downlink unit band (DL CC1) on the left side shown in Fig. 3B, when a communication with the base station begins, and reads a unit band information from uplink, which pairs with the downlink unit band on the left side from a broadcast signal called a "system information block type 2 (SIB2)". (2) Using this uplink unit band (UL CC1), terminal 1 begins communication with the base station by transmitting, for example, a connection request to the base station. (3) Upon deciding that a plurality of downlink unit bands needs to be assigned to the terminal, the base station instructs the terminal to add a downlink unit band (DL CC2). In this case, however, the number of uplink unit bands does not increase, and a terminal 1 which is an individual terminal starts an asymmetric carrier aggregation.
[00021] Furthermore, in LTE-A to which carrier aggregation is applied, a terminal can receive a plurality of downlink data in a plurality of downlink unit bands at once. In LTE-A, a channel selection (which may also be referred to as "multiplexing" or "code selection") is being discussed as one of the methods of transmitting a plurality of response signals in response to the plurality of data from downlink. In channel selection, not only a symbol used for a response signal, but also a feature to which the response signal is mapped are changed according to a pattern of an error detection result in the plurality of data from downlink. That is, channel selection is a technique that changes not only a phase point (ie a constellation point) of the response signal, but also a feature used to transmit the response signal, based on whether each of the response signals in response to a plurality of downlink data received in a plurality of downlink unit bands is ACK or NACK, as illustrated in Figure 4 (see Non-Patent Literatures 5, 6 and 7) .
[00022] Here, an ARQ control based on channel selection, when the asymmetric carrier aggregation described above is applied to a terminal, will be described below with reference to figure 4.
[00023] For example, as illustrated in Figure 4, when a unity band group (which can be expressed as "component carrier set" in English) is configured with the downlink unit bands and 2 and the link unit band reverse link 1 is set to terminal 1, downlink resource allocation information is transmitted from base station to terminal 1 via respective downlink unit band PDCCHs 1 and 2, and then link data downlink resources are transmitted using a resource corresponding to the downlink resource assignment information.
[00024] When the terminal is successful in receiving the downlink data in unit band 1 and fails to receive the downlink data in unit band 2 (i.e., when a unit band 1 response signal is ACK and a unity band response signal 2 is NACK), the response signal is mapped to a PUCCH resource included in PUCCH region 1, and a first phase point (e.g., a phase point (1, 0)) is used as a phase point of the response signal. Further, when the terminal is successful in receiving downlink data as unit band 1 and is also successful in receiving downlink data in unit band 2, the response signal is mapped to a PUCCH resource. included in the PUCCH 2 region, and the first phase point is used. That is, when there are two downlink unit bands, there are four error detection result patterns, so the four patterns can be represented by combinations of two features and two types of phase points. Citation List Patent Literature NPL 1 3GPP TS 36.211 V8.7.0, "Physical Channels and Modulation (Release 8)", May 2009 NPL 2 3GPP TS 36.212 V8.70, "Multiplexing and channel coding (Release 8)", May 2009 NPL 3 3GPP TS 36.213 V8.7.0, "Physical layer procedures (Release 8)", May 2009 NPL 4 Seigo Nakao, Tomofumi Takata, Daichi Imamura, and Katsu-hiko Hiramatsu, "Performance enhancement of E-UTRA uplink control channel in fast fading environments", Proceeding of IEEE VTC 2009 spring, April 2009 NPL 5 ZTE, 3GPP RAN1 meeting #57bis, R1-092464, "Uplink Control Channel Design for LTE-Advanced", June 2009 NPL 6 Panasonic, 3GPP RAN1 meeting #57bis, R1-092535, "UL ACK/NACK transmission on PUCCH for carrier aggregation", June 2009 NPL 7 Nokia Siemens Networks, Nokia, 3GPP RAN1 meeting #57bis, R1-092572, "UL control signaling for carrier aggregation ", June 2009 Invention Summary Technical Problem
[00025] As described above, the SR feature and the ACK/NACK feature have the same format, and when the SR and the response signal are simultaneously transmitted, the terminal transmits the response signal using the SR feature. Here, when channel selection is applied in the LTE-A system, the ACK / NACK resources, whose number is equal to the number of downlink unit bands regulated for the terminal (2 ACK / NACK resources in Figure 4) are used as described above. Also, when the same technique (i.e., an SR transmission technique according to which the SR resource and the ACK/NACK resource are used) as in LTE is used in the LTE-A system, in order to simultaneously if the SR and the response signal are transmitted, the SR resources whose number is equal to the number of ACK/NACK resources are needed.
[00026] That is, as illustrated in Figure 5A, in the case where channel selection is applied using the two ACK / NACK resources, when the same technique as in LTE is used to simultaneously transmit the SR and the response signal, the two SR resources whose number is equal to the number of ACK/NACK resources are needed. For example, when the terminal does not generate the SR and transmits only the response signal ("when only the response signal is transmitted" illustrated in Figure 5B), the terminal contains information as to not just one symbol (i.e., a phase point) used for the response signal, but also to which of the ACK / NACK resources (PUCCH regions 1 and 2 in Figure 4) the response signal has been mapped and then transmits a signal (the signal Give me an answer). On the other hand, when the tem has generated the SR and the response signal in the same subframe ("when the response signal and the SR are transmitted" illustrated in Figure 5C), the terminal contains information as to not just one symbol (i.e. is, a phase point) used for the response signal, but also which of the two SR resources the response signal has been mapped to, and then transmits a signal (the response signal).
[00027] Thus, the base station can recognize an SR generation status on the terminal side by means of which resources belonging to the "SR resource group" including the two SR resources or the "ACK/NACK resource group " including the two ACK/NACK features are used. Further, the base station can recognize whether or not the terminal was successful in receiving downlink data transmitted in each unit band by a resource belonging to the message group used on the terminal side and a phase point of the resource.
[00028] As described above, when channel selection is used, it is necessary to prepare a plurality of SR resources and a plurality of ACK/NACK resources (two SR resources and two ACK/NACK resources in Fig. 5A). However, as illustrated in figures 5B to 5D, only one PUCCH resource out of the four PUCCH resources (the two SR resources and the two ACK / NACK resources) is used in a certain subframe. That is, the three PUCCH resources out of the four PUCCH resources are not always used in a certain subframe.
[00029] As described above, when channel selection is applied in LTE-A as a method of transmitting the response signal, if the case in which the SR and the response signal are simultaneously generated in the same subframe is considered, the Uplink Control Channel (PUCCH) processing time increases with waste.
[00030] It is an object of the present invention to provide a terminal apparatus and a transmission control method, which are capable of suppressing an increase in the uplink control channel (PUCCH) processing time, even when selecting channel is applied as a method of transmitting the response signal when a carrier aggregation communication is performed using a plurality of downlink unit bands. Solution to Problem
[00031] A terminal apparatus of the present invention is a terminal apparatus that communicates with a base station using a unity band group including a plurality of downlink unit bands and at least one uplink unit band, and has a a configuration including a control information receiving section that receives downlink assignment control information corresponding to downlink data transmitted in at least one downlink unit band in the unit band group, a data receiving section a downlink that receives downlink data corresponding to the downlink assignment control information, an error detection signal that detects a reception error of the received downlink data, and a control section that transmits a control signal uplink representing generation of uplink data or a response signal a through an uplink unit band uplink control channel, using a response signal transmission rule, based on a generation status of the uplink data and an error detection result obtained by the error detection, wherein the transmission rule, when the uplink control signal and the response signal have been generated simultaneously in a unitary transmission time, a pattern candidate of the error detection result is associated with a pair of a resource of an uplink control channel to which the response signal is assigned and a phase point of the response signal, different pairs are associated with different pattern candidate groups which are different in the number of ACKs included in a pattern, and different pairs are associated with different pattern candidate groups which are the same in the number of ACKs included in a pattern, but different in an ACK position in a pattern.
[00032] A retransmission control method of the present invention includes a step of receiving control information from receiving a downlink assignment control information corresponding to downlink data transmitted in at least one downlink unit band in a unity band group including a plurality of downlink unit bands and at least one uplink unit band, a downlink downlink data receiving step corresponding to the assignment control information. downlink, an error detection step of detecting a reception error of the received downlink data, and a transmission control step of an uplink control signal representing a generation of uplink data or a signal of response through an uplink unit-band control channel. uplink, using a response signal transmission rule, based on a generation status of the uplink data and an error detection result obtained by the error detection step, where, when the link control signal ascending and the response signal have been generated simultaneously in a unitary transmission time, the control step includes making a pair of a resource to which the response signal is assigned and a phase point of the response signal to be different, according to the number of ACKs in an error detection result pattern, and to make a pair of a resource to which the response signal is assigned and a phase point of the response signal to be different, according to a ACK position in a pattern when a plurality of error detection result patterns have the same number of ACKs is present. Advantageous Effects of the Invention
[00033] According to the present invention, a terminal apparatus and a retransmission control method can be provided which are capable of suppressing an increase in the uplink control channel (PUCCH) processing time, even when channel selection is applied as a response signal transmission method when a carrier aggregation communication is performed using a plurality of downlink unit bands. Brief Description of Drawings
[00034] Figure 1 is a diagram illustrating a method of scattering a response signal and a reference signal; figures 2A to 2D are diagrams describing a method of transmitting an SR and a response signal by a terminal; Figures 3A and 3B are diagrams for describing an asymmetric carrier aggregation applied to individual terminals and a control sequence thereof; Fig. 4 is a diagram for describing an ARQ control when a carrier aggregation is applied to a terminal; Figures 5A to 5D are diagrams for describing a method of transmitting an SR and a response signal by a terminal, when a channel selection is applied as a method of transmitting a response signal, upon a carrier performing a communication with aggregation using a plurality of downlink unit bands; Figure 6 is a block diagram illustrating a configuration of a base station in accordance with Embodiment 1 of the present invention; Figure 7 is a block diagram illustrating a terminal configuration according to Embodiment 1 of the present invention; Figures 8A to 8D are diagrams for describing a method of transmitting an SR and a response signal by a terminal according to Embodiment 1 of the present invention (when two downlink unit bands are regulated to a terminal); Figures 9A and 9B are diagrams for describing a response signal in an ACK/NACK resource and an SR resource according to Modality 1 of the present invention (when two downlink unit bands are regulated for one terminal) ; figures 10A to 10D are diagrams for describing a method of transmitting an SR and a response signal by a terminal, according to Embodiment 1 of the present invention (when three downlink unit bands are set for a terminal) ; figures 11A and 11B are diagrams for describing the mapping of a response signal into an ACK/NACK resource and an SR resource according to Modality 1 of the present invention (when three downlink unit bands are set to one terminal); Figures 12A to 12D are diagrams for describing a method of transmitting an SR and a response signal by a terminal according to Embodiment 2 of the present invention; Figures 13A and 13B are diagrams for the mpa description of a response signal in an ACK/NACK resource and an SR resource according to Modality 2 of the present invention (mapping example 1); figures 14A and 14B are diagrams for the mpa description of a response signal in an ACK/NACK resource and an SR resource according to Modality 2 of the present invention (mapping example 2); figures 15A and 15B are diagrams for mpa description of a response signal in an ACK/NACK resource and an SR resource according to Modality 2 of the present invention (mapping example 3); figures 16A and 16B are diagrams for the mpa description of a response signal in an ACK/NACK resource and an SR resource according to Modality 2 of the present invention (mapping example 4); and Figures 17A and 17B are diagrams illustrating a variation of the present invention. Description of Modalities
[00035] From this point on, the embodiments of the present invention will be described in detail with reference to the associated drawings. In the following embodiments, like reference numbers denote like parts, and the redundant description will not be repeated. (Mode 1) [Communication System Overview]
[00036] In a communication system including a base station 100 and a terminal 200, which will be described later, a communication using uplink unit bands and a plurality of downlink unit bands associated with the uplink unit bands is performed, that is, a combination based on a specific asymmetric carrier aggregation for the terminal 200 is performed. This communication system also includes a terminal that does not have a function of performing communication based on a carrier aggregation and performs communication by a downlink unitary band and an uplink unitary band associated with the downlink unitary band ( that is, a communication not based on carrier aggregation), unlike terminal 200.
[00037] Thus, the base station 100 is configured to support both communications based on an asymmetric carrier aggregation and a communication not based on carrier aggregation.
[00038] A communication not based on a carrier aggregation can be performed between the base station 100 and the terminal 200 according to a resource assignment with respect to the terminal 200 by the base station 100.
[00039] In this communication system, when communication not based on carrier aggregation is performed, ARQ is performed as in the conventional technique, whereas, when communication based on carrier aggregation is performed, channel selection is employed in ARQ. That is, this communication system, for example, is an LTE-A system, the base station 100, for example, is an LTE-A base station, and the terminal 200, for example, is an LTE-terminal. THE. The terminal having no function of performing communication based on carrier aggregation, for example, is an LTE terminal.
[00040] Next, a description will be made according to the following premise. That is, an asymmetric carrier aggregation specific for the terminal 200 is configured between the base station 100 and the terminal 200 beforehand, and information of a downlink unit band and an uplink unit band used by the terminal 200 is shared. between base station 100 and terminal 200. [Base Station Setup]
[00041] Figure 6 is a block diagram illustrating a configuration of base station 100 according to Modality 1 of the present invention. Referring to Fig. 6, base station 100 includes a control section 101, a control information generation section 102, a coding section 103, a modulation section 104, a coding section 105, a coding section. data transmission 106, a modulation section 107, a mapping section 108, an IFFT section 109, a CP adding section 110, a radio transmission section 111, a radio receiving section 112, a radio reception section. CP removal 113, a PUCCH extraction section 114, a concentration section 115, a sequence control section 116, a correlation processing section 117, a decision section 118, and a control signal generation section. relay 119.
[00042] The control section 101 assigns a downlink resource for transmitting a control information (i.e. a downlink control information assignment resource) and a downlink resource for transmitting data from downlink (i.e., a downlink data assignment resource) to the resource assignment target terminal 200. This resource assignment is performed in a downlink unit band included in a regulated unit band group for the terminal resource assignment target 200. The downlink control information assignment resource is selected from the resources corresponding to the downlink control channel (PDCCH) in each downlink unit band. Further, the downlink data assignment resource is selected from the resources corresponding to the downlink data channel (PDSCH) in each downlink unit band. Further, when a plurality of resource assignment target terminals 200 are present, the control section 101 assigns different resources to respective resource assignment target terminals 200.
[00043] Downlink control information assignment resources are equivalent to L1/L2 CCHs described above. That is, each of the downlink control information assignment resources is configured with one or more CCEs. Further, the CCEs included in the downlink unit band are associated with component resources of the uplink control channel region (PUCCH region) in an uplink unit band in the unit band group in a manner corresponding to one to one (that is, an index of each CCE is associated with an index of the PUCCH in a one-to-one correspondence manner). That is, each CCE in an uplink unit band n is associated with a component resource of a PUCCH region n in an uplink unit band in a unit band group in a one-to-one correspondence manner.
[00044] The control section 101 determines a coding rate used for the transmission of a control information to the resource assignment target terminal 200. Since the data amount of the control information differs according to this rate of encoding, the control section 101 assigns downlink control information assignment resources having a number of CCEs to which control information having this amount of data can be mapped.
[00045] The control section 101 extracts information related to the downlink data assignment feature for the control information generation section 102. In addition, the control section 101 extracts information related to the encoding rate for the section coding 103. Further, control section 101 decides a coding rate of transmission data (i.e., downlink data) and extracts the decided coding rate for coding section 105. Further, control section 101 extracts an information related to the downlink data assignment facility and an information related to the downlink control information assignment facility to the mapping section 108. Here, the control section 101 performs a control so that data from downlink and a downlink control information for the downlink data are mapped to the same downlink unit band.
[00046] The control information generation section 102 generates a control information including information related to the downlink data assignment facility, and extracts the generated control information for the encoding section 103. This control information is generated for each downlink unit band. When a plurality of resource assignment target terminals 200 are present, a terminal ID of a target terminal is included in the control information so as to discriminate between resource assignment target terminals 200. For example, the control information includes a CRC bit masked with the terminal ID of the destination terminal. This control information may be termed a "downlink assignment control information (control information carrying a downlink assignment)".
[00047] The encoding section 103 encodes the control information according to the encoding rate received from the control section 101, and extracts the encoded control information for the modulation section 104.
[00048] Modulation section 104 modulates the encoded control information and extracts the modulated signal to mapping section 108.
[00049] The encoding section 105 receives transmission data (i.e., downlink data) from each destination terminal 200 and the encoding rate information from the control section 101 as an input, encodes the transmission data. , and extracts the encoded transmission data to the data transmission control section 106. Here, when a plurality of downlink unit bands is assigned to the destination terminal 200, each transmission data transmitted over each unit link band downlink is encoded, and the encoded transmission data is then extracted to the transmission data control section 106.
[00050] At the time of the first transmission in time, the data transmission control section 106 retains the coded transmission data and also extracts the coded transmission data to the modulation section 107. The coded transmission data is retained for each destination terminal 200. Further, transmission data for a destination terminal 200 is held for each downlink unit band to be transmitted. Thus, not only a retransmission control of all data to be transmitted to the destination terminal 200, but also a retransmission control of each downlink unit band can be performed.
[00051] Further, upon receipt of NACK or DTX for downlink data transmitted over a certain downlink unit band from the retransmission control signal generation section 119, the data transmission control section 106 extracts hold data corresponding to the downlink unit band for the modulation section 107. Upon receipt of ACK for downlink data transmitted in a certain downlink unit band from the retransmission control signal generation section 119, the data transmission control section 106 clears the hold data corresponding to the downlink unit band.
[00052] The modulation section 107 modulates the encoded transmission data received from the transmission data control section 106, and extracts a modulated signal to the mapping section 108.
[00053] The mapping section 108 maps the modulated signal of the control information received from the modulation section 104 to a resource represented by the downlink control information assignment facility received from the control section 101, and extracts a mapping result for the IFFT section 109.
[00054] Further, the mapping section 108 maps the modulated signal of the transmission data received from the modulation section 107 to a resource represented by the downlink data assignment facility received from the control section 101, and extract a mapping result for the IFFT section 109.
[00055] Control information and transmission data mapped to a plurality of subcarriers in a plurality of downlink unit bands by the mapping section 108 are transformed from frequency domain signals to time domain signals by the IFFT section 109, and transformed into OFDM signals with a CP added by the CP 110 addition section, are subjected to a transmission process, such as a digital to analog (D/A) conversion process, an amplification process, and a upconversion process by the radio transmission section 111, and are transmitted to the terminal 200 through an antenna.
[00056] The radio receiving section 112 receives a response signal or a reference signal transmitted from the terminal 200 through the antenna, and performs a reception process such as a downconversion process and a downconversion process. digital to analog (A/D), on the response signal or on the reference signal.
[00057] CP removal section 113 removes a CP added to the response signal or the reference signal that has been submitted to the receive process.
[00058] PUCCH extract section 114 extracts PUCCH regions (PUCCH regions respectively corresponding to PUCCH resources) corresponding to M SR resources and N ACK / NACK resources from the PUCCH signal included in the received signal, and classifies the PUCCH signals extracted in processing systems corresponding to the respective resources. The terminal 200 transmits an uplink control information (i.e., one or both of the SR and the answer signal) using any of the PUCCH resources.
[00059] The 115-x concentration section and the 117-x correlation processing section process the PUCCH signal extracted from the PUCCH region corresponding to an xth PUCCH resource (the SR resource or the ACK resource / NACK. Here, x = 1 a (M+N)). The base station 100 is provided with processing systems of concentration section 115 and correlation processing section 117 corresponding to each PUCCH resource x (the SR resource or the ACK/NACK resource. Here, x = 1 a (M) +N)) used by base station 100.
[00060] Specifically, concentration section 115 concentrates a signal from a portion corresponding to the response signal using a Walsh sequence which the terminal 200 uses for a secondary broadcast on each PUCCH resource (the SR resource or the ACK/NACK), and extracts the concentrated signal to correlation processing section 117. Further, concentration section 115 concentrates a signal from a portion corresponding to the reference signal using a DFT sequence which terminal 200 uses for broadcast of the reference signal in each PUCCH resource (the SR resource or the ACK/NACK resource), and extracts the concentration signal to the correlation processing section 117.
[00061] The sequence control section 116 generates a ZAC sequence which can possibly be used for broadcasting the response signal and the reference signal transmitted from the terminal 200. Furthermore, the sequence control section 116 specifies windows of correlations which respectively correspond to (M+N) PUCCH resources (SR resources and ACK / NACK resources), based on a PUCCH resource which can possibly be used by terminal 200. Then, the control section of string 116 extracts information representing the specified correlation window and the generated ZAC sequences for the correlation processing section 117.
[00062] The correlation processing section 117 calculates a correlation value between the signal input from the concentration section 115 and the ZAC sequence that can possibly be used for primary broadcast at the terminal 200, using the information representing the window of correlation and the ZAC sequences input from the sequence control section 116, and extracts the calculated correlation value for the decision section 118.
[00063] The decision section 118 decides whether the SR and the response signal are being transmitted from the terminal 200, based on the correlation value entered from the correlation processing section 117. That is, the decision section 118 decides whether any of the (M + N) PUCCH resources (SR resources and ACK / NACK resources) are being used by the terminal 200 or if none of the (M + N) PUCCH resources are being used by the terminal 200.
[00064] For example, when it is decided that any one of the M SR resources is being used by terminal 200 in a sync when terminal 200 transmits the response signal in response to downlink data, decision section 118 decides that the SR and the response signal are being transmitted from the terminal 200. Further, when it is decided that any one of the M SR resources (or a predetermined SR resource) is being used by the terminal 200 in other sync than sync when the terminal 200 transmits the response signal in response to the downlink data, the decision section 118 decides that only the SR is being transmitted from the terminal 200. Further, when it is decided that any of the N ACK/NACK resources is being used by the terminal 200, the decision section 118 decides that only the response signal is being transmitted from the terminal 200. Still, when it is decided that none of the resources are being used by the terminal , decision section 118 decides that neither the SR nor the response signal is being transmitted from the terminal 200.
[00065] Furthermore, when it is decided that the terminal 200 is transmitting the SR, the decision section 118 extracts an information related to the SR to an uplink resource assignment control section (not shown). Further, when it is decided that the terminal 200 is transmitting the response signal, the decision section 118 decides a phase point represented by the response signal through a synchronization detection. In detail, decision section 118 first determines a PUCCH resource from which a maximum correlation value has been detected among the PUCCH resources corresponding to correlation processing sections 117-1 to 117(M + N). Then, decision section 118 specifies a phase point of the response signal transmitted via the PUCCH resource from which the maximum correlation value was detected, and specifies a reception status pattern that corresponds to the PUCCH resource, the specified phase point and the number of downlink unit bands through which its own station has transmitted downlink data to terminal 200. Then, decision section 118 individually generates an ACK signal or a NACK signal on data transmitted in each downlink unit band based on the error detection result pattern, and extracts the ACK signal or the NACK signal to the retransmission control signal generation section 119. Here, when all values of obtained correlations corresponding to the respective PUCCH resources are equal to or less than a specific threshold value, decision section 118 decides that a non-response signal has been transmitted to from terminal 200, generates a DTX for all downlink data, and extracts the DTX to the retransmission control signal generation section 119.
[00066] Further, when the uplink resource assignment control section (not shown) receives itself, the base station 100 transmits the uplink assignment control information (which may also be referred to as "granting of uplink"), which notifies an uplink data assignment resource to the terminal 200 so that the terminal 200 can transmit the uplink data. Thus, base station 100 decides whether a resource for uplink data needs to be assigned to terminal 200, based on the uplink control channel. The details of an operation of the uplink resource assignment control section and the details of an operation of base station 100 of assigning a resource for uplink data to the terminal 200 will not be described.
[00067] Retransmission control signal generation section 119 generates a retransmission control signal for data (downlink data) transmitted in each downlink unit band based on information input from decision section 118. Specifically, when the response signal representing NACK or DTX is received, the retransmission control signal generating section 119 generates a retransmission control signal representing a retransmission command, and extracts the retransmission control signal to the retransmission section. data transmission control 106. Further, when the response signal representing ACK is received, the retransmission control signal generating section 119 generates a retransmission control signal representing that a retransmission is not necessary, and extracts the signal from re-transmission control for data transmission control section 106. [Terminal Setting]
[00068] Figure 7 is a block diagram illustrating a configuration of the terminal 200 according to Modality 1 of the present invention. Referring to Fig. 7, terminal 200 includes radio receiving section 201, CP removing section 202, Fast Fourier transform (FFT) section 203, extracting section 204, demodulation section 205, the decoding section 206, the decision section 207, the control section 208, the demodulation section 209, the decoding section 210, the CRC section 211, the response signal generation section 212, the modulation section 213, primary broadcast section 214, secondary broadcast section 215, IFFT section 216, CP add section 217, and radio broadcast section 218.
[00069] The radio reception section 201 receives an OFDM signal transmitted from the base station 100 through an antenna, and performs a reception process, such as a downconversion process, an A/D conversion process, in the received OFDM signal.
[00070] CP removal section 202 receives a CP added to the OFDM signal after receiving processing.
[00071] The FFT section 203 transforms the received OFDM signal into a frequency domain signal by FFT and extracts the received signal to the extract section 204.
[00072] Further, the extracting section 204 extracts the downlink control channel signal (the PDCCH signal) from the received signal that was received from the FFT section 203 according to a coding rate information input. That is, since the number of CCEs configuring the downlink control information assignment feature changes depending on the coding rate, the extraction section 204 extracts the downlink control channel signal using the number of CCEs which corresponds to the encoding rate as an extraction unit. Furthermore, the downlink control channel signal is extracted from each downlink unit band. The extracted downlink control channel signal is extracted to the demodulation section 205.
[00073] Further, the extraction section 204 extracts the downlink data from the received signal based on information related to the downlink data assignment facility, which is addressed to its own terminal, received from the section of decision 207, and extracts the extracted downlink data to the demodulation section 209.
[00074] The demodulation section 205 demodulates the downlink control channel signal received from the extraction section 204, and extracts the obtained demodulation result to the decoding section 206.
[00075] The decoding section 206 decodes the received demodulation result from the demodulation section 205 according to the input coding rate information, and extracts the obtained decoding result for the decision section 207.
[00076] The decision section 207 makes a blind decision as to whether or not the control information included in the decoding result received from the decoding section 206 is control information addressed to its own terminal. This decision is made using the decoding result corresponding to the extraction unit as a unit. For example, decision section 207 unmasks a CRC bit using its own terminal's terminal ID, and decides a control information with CRC = OK (no error) as the control information addressed to its own terminal. Then, the decision section 207 extracts information related to the downlink data assignment facility for its own terminal, which is included in the control information addressed to its own terminal, to the extracting section 204.
[00077] Further, decision section 207 specifies each CCE for which control information is addressed to its own terminal, which is included in control information addressed to its own terminal, to extraction section 204.
[00078] Further, decision section 207 specifies each CCE for which control information addressed to its own terminal is mapped into the downlink control channel of each downlink unit band, and extracts an identification number (i.e. is, a CCE index) of the CCE specified for control section 208.
[00079] Control section 208 specifies a PUCCH (frequency / code) resource corresponding to the CCE to which downlink control information received in an nth (n = first to Nth) unit band is mapped, ie. that is, a PUCCH n resource (that is, an ACK / NACK n resource) in a PUCCH n region, based on the CCE identification number received from the decision section 207. Then, the control section 208 decides a PUCCH resource to be used for transmitting the response signal from among the N ACK/NACK resources previously notified from the base station 100.
[00080] Specifically, the control section 208 decides a PUCCH resource to be used and a phase point to be regulated so as to transmit a signal according to a transmission rule (a mapping rule) of the response signal, which will be described later, based on the SR generation status information received from an uplink data generation section (not shown) and an error detection result (i.e., a success pattern / reception failure) of downlink data in each downlink unit band received from CRC section 211.
[00081] Then, the control section 208 extracts an information related to the phase point to be regulated, for the response signal generation section 212, extracts the ZAC sequence and the cyclic shift index corresponding to the PUCCH resources to be used for the primary broadcast section 214 and extract the frequency resource information for the IFFT section 216. Here, when there is no response signal to be transmitted through the subframe having received the SR from the generating section uplink data (i.e., when the downlink assignment control information is not detected at all), the control section 208 instructs the response signal generation section 212 to extract "NACK" for the modulation 213. Further, control section 208 extracts a Walsh sequence and a DFT sequence corresponding to the PUCCH resources to be used for the secondary broadcast section 215. The left controller details about the resource s of PUCCH and the phase points by control section 208 will be described later.
[00082] The demodulation section 209 demodulates the downlink data received from the extraction section 204, and extracts the demodulated data to the decoding section 210.
[00083] The decoding section 210 decodes the received downlink data from the demodulation section 209 and extracts the decoded downlink data to the CRC section 211.
[00084] The CRC section 211 generates the decoded downlink data received from the decoding section 210, and performs an error detection for each downlink unit band using a CRC. Then, CRC section 211 extracts an ACK to control section 208 when CRC = OK (no error), but extracts NACK to control section 208 when CRC = NG (error). Further, when CRC = OK (no error), the CRC section 211 extracts the decoded downlink data as received data.
[00085] The response signal generating section 212 generates the response signal and the reference signal based on the phase point of the response signal instructed from the control section 208, and extracts the response signal and the signal. reference to modulation section 213.
[00086] The modulation section 213 modulates the response signal and the reference signal input from the response signal generating section 212, and extracts the modulated response signal and the modulated reference signal to the primary broadcast section. 214.
[00087] The primary broadcast section 214 performs a primary broadcast on the response signal and the reference signal based on the ZAC sequence and the cyclic shift index by the control section 208, and extracts the primary broadcast response signal and the primary broadcast reference signal to the secondary broadcast section 215. That is, the primary broadcast section 214 performs a primary broadcast on the response signal and the reference signal in accordance with an instruction from the control section 208. Here, "broadcast" specifically means the multiplication of the response signal represented by the information of a symbol by the ZAC sequence.
[00088] The secondary broadcast section 215 performs a secondary broadcast on the response signal and the reference signal using a Walsh sequence and a DFT sequence regulated by the control section 208, and extracts the secondary broadcast signal for the IFFT 216. That is, the secondary broadcast section 215 performs a secondary broadcast on the primary broadcast response signal and the primary broadcast reference signal using the Walsh sequence and the DFT sequence corresponding to the PUCCH resources selected by the control section 208, and extracts the broadcast signal to the IFFT section 216. That is, the secondary broadcast section 215 multiplies the response signal and the reference signal which were subjected to a primary broadcast by a component of the sequence of Walsh or a component of the DFT sequence.
[00089] CP add section 217 adds the same signal as the end part of the signal which has been IFFT submitted, to the start part of the signal as a CP.
[00090] Radio transmission section 218 performs transmission processing, such as a D/A conversion process, an amplification process, and an upconversion process, on the input signal. Then, radio transmission section 218 transmits the signal to base station 100 through the antenna. [Operation of the terminal 200]
[00091] An operation of the terminal 200 having the above configuration will be described. <Reception of Downlink Assignment Control Information and Downlink Data by Terminal 200>
[00092] The terminal 200 makes a blind decision as to whether downlink assignment control information addressed to its own terminal has been transmitted for each subframe in all downlink unit bands of a regulated unit band group for its own terminal.
[00093] Specifically, decision section 207 decides whether or not downlink assignment control information addressed to its own terminal is included in the downlink control channel of each downlink unit band. Then, when it is decided that the downlink assignment control information addressed to its own terminal is included, the decision section 207 extracts the downlink assignment control information to the extraction section 204. decision 207 extracts the downlink unit band identification information in which the downlink assignment control information addressed to its own terminal has been detected for the control section 208. Thus, the control section 208 is notified of the unit band in which downlink assignment control information addressed to its own terminal has been detected.
[00094] The extraction section 204 extracts downlink data from the received signal based on the downlink assignment control information received from the decision section 207. The extraction section 204 extracts the downlink data to from the received signal based on the resource information included in the downlink assignment control information.
[00095] For example, downlink assignment control information transmitted in downlink unit band 1 includes information related to a resource used for a transmission of downlink data (DL data) transmitted in unit link band downlink 1, and a downlink assignment control information transmitted in downlink unit band 2 includes information relating to a resource used for transmission of downlink data transmitted in downlink unit band 2.
[00096] Thus, terminal 200 can receive downlink data in downlink unit band 1 and downlink unit band 2 by receiving downlink assignment control information transmitted in downlink unit band 1 and from downlink assignment control information transmitted in the downlink unit band 2. On the other hand, when the terminal has difficulty receiving the downlink assignment control information in a certain downlink unit band, the terminal 200 has difficulty in receiving downlink data in the corresponding downlink unit band. <Response and SR Transmission by Terminal 200>
[00097] The CRC section 211 performs an error detection on the downlink data corresponding to the successfully received downlink assignment control information, and extracts an error detection result for the control section 208.
[00098] Then, the control section 208 performs a transmission control of the response signal as follows, based on the generation status of the SR received from the uplink data generation section (not shown) and the result of error detection received from CRC section 211. Figures 8 and 9 are diagrams for describing a method of transmitting an SR and a response signal through terminal 200 when two downlink unit bands are regulated to terminal 200. Figures 10 and 11 are diagrams for describing a method of transmitting an SR and a response signal through terminal 200 when three downlink unit bands are set for terminal 200. <Response Transmission and SR through Terminal 200: When There Are Two Downlink Unit Bands>
[00099] A description will be made below regarding an example in which two downlink unit bands (downlink unit bands 1 and 2) are regulated for terminal 200. Here, an ACK/NACK resource (PUCCH resource ) associated with a downlink control information assignment resource used for a downlink assignment control information for downlink data transmitted in downlink unit band 1 is defined as an ACK/NACK resource 1. Further , an ACK/NACK resource (PUCCH resource) associated with a downlink control information assignment resource used for a downlink assignment control information for downlink data transmitted in downlink unit band 2 is defined as an ACK / NACK 2 resource.
[000100] Further, in the following description, the base station 100 independently notifies the terminal 200 of information related to a resource (an SR resource illustrated in Figure 8A) for the transmission of an SR in an uplink unit band illustrated in Figure 4 (a regulated uplink unit band for terminal 200). That is, control section 208 of terminal 200 retains information relating to an SR resource notified from base station 100 through a separate signaling unit (e.g., higher layer signaling).
[000101] Further, the terminal 200 specifies an ACK/NACK resource associated with a CCE, which is occupied by the downlink assignment control information received by its own terminal, among a plurality of CCEs configuring PDCCHs of unit bands of downlink 1 and 2, such as ACK/NACK 1 or 2.
[000102] Here, in Fig. 8A, an SR resource and the ACK / NACK resources 1 and 2 are code resources different from each other in that at least one of a ZAC (primary broadcast) sequence or a Walsh sequence / DFT sequence is different.
[000103] An operation of terminal 200 at this time is described in detail with reference to figures 9A and 9B. Here, ACK/NACK resources 1 and 2 illustrated in Fig. 9A and an SR resource illustrated in Fig. 9B correspond to ACK/NACK resources 1 and 2 and an SR resource illustrated in Figs. 8A to 8D, respectively. Further, in Figures 9A and 9B, "A" represents ACK, "N" represents NACK, and "D" represents DTX. In Figures 9A and 9B, for example, "A/N" represents a state in which a response signal corresponding to downlink unit band 1 (CC1) is ACK, but a response signal corresponding to downlink unit band 2 (CC2) is NACK. Further, "N/A" represents a state in which a response signal corresponding to downlink unit band 1 (CC1) is NACK and it was difficult to detect a downlink assignment control information corresponding to downlink data transmitted in the downlink unit band 2 (CC2) (i.e. a DTX corresponding to downlink unit band 2 (CC2)). Further, in Fig. 9B, for example, "SR + A/N" represents a state in which "A/N" is transmitted using an SR resource. At this time, base station 100 detects an SR from the side of terminal 200, based on whether or not the SR feature is being used, and determines that a response signal is "A/N" based on a phase point to which the signal is mapped.
[000104] First, when the terminal 200 transmits only the reply signal ("when only the reply signal is transmitted" illustrated in Fig. 8B), the terminal 200 performs a channel selection operation using the ACK/ NACK 1 and 2 associated with CCEs occupied by downlink assignment control information corresponding to downlink data transmitted in downlink unit bands 1 and 2, as illustrated in Fig. 9A. Specifically, the control section 208 of the terminal 200 transmits the response signal using a transmission rule (a mapping rule) of the response signal illustrated in Fig. 9A, based on a pattern (state) as to whether the data of downlink addressed to its own terminal, which correspond to the downlink assignment control information and were transmitted in downlink unit bands 1 and 2, were successfully received (error detection result).
[000105] Here, it should be noted that the states (D/A and D/N) in which a DTX was generated for downlink unit band 1 (CC1) are all notified by the ACK/NACK resource phase point 2, other than the ACK/NACK 1 feature shown in Figure 9A. This is because, when the terminal 200 has not detected the downlink assignment control information for downlink data in downlink unit band 1 (i.e., in the case of DTX), it is difficult to specify the ACK/NACK resource 1 to be used on the side of terminal 200. Similarly, the states (A/D and N/D) in which DTX was generated on downlink unit band 2 (CC2) are all notified by the phase point of the ACK / NACK 1 feature, not the ACK / NACK 2 feature shown in Figure 9A. This is because, when the terminal 200 has not detected the downlink assignment control information corresponding to the downlink data in the downlink unit band 2 (i.e., in the case of DTX), it is difficult to specify an ACK resource / NACK 2 to be used on the side of terminal 200. As described above, in the ACK/NACK feature, there is a limitation to a feature which can be used for notification of a state in which DTX has been generated.
[000106] In Figure 9A, if all three states (N/D, D/N and N/N) where all of NACK or DTX can be notified through the same resource and the same phase point, a total of four phase points become necessary for notification of all states (8 states, illustrated in figure 9A (a total of 8 reception success/failure patterns) ie either of the two SR features illustrated in figure 9A can However, due to the limitation of the ACK/NACK resource, when the terminal 200 transmits only the response signal, as shown in Figure 8B, two ACK/NACK resources 1 and 2 (i.e., resources whose number is equal the number of downlink unit bands regulated for terminal 200) will become necessary.
[000107] On the other hand, when the terminal 200 simultaneously transmits the SR and the reply signal in the same subframe ("when the SR and the reply signal are transmitted" illustrated in Fig. 8C), the terminal 200 transmits the reply signal using the SR feature notified from the base station 100 by a separate signaling technique as illustrated in Fig. 9B. Specifically, the control section 208 of the terminal 200 transmits the response signal using the transmission rule (the mapping rule) of the response signal illustrated in Fig. 9B, based on the pattern (state) as to whether the link data corresponding to the downlink assignment control information addressed to its own terminal has been successfully received (error detection result).
[000108] Here, a description will be made in relation to the transmission rule (mapping rule) (figure 9B) of the response signal used when the SR and the response signal were generated simultaneously in the same subframe ("when the SR and the response signal are transmitted" illustrated in Figure 8C).
[000109] In Fig. 9B, when all pieces of downlink assignment control information and downlink data transmitted in unitary downlink bands 1 and 2 corresponding to the respective downlink assignment control information have been received in a manner successful, a phase point (-1, 0) is used. That is, in figure 9B, "A/A" is associated with the phase point (-1, 0) of the SR resource.
[000110] Further, when the downlink data of downlink unit bands 1 and 2 corresponding to the two pieces of downlink assignment control information, downlink data of downlink unit band 1 was received in a manner successful, but downlink data from downlink unit band 2 failed to receive, a phase point (0, -j) is used. That is, in figure 9B, "A/N" and "A/D" are associated with the phase point (0, -j) of the SR resource.
[000111] Further, when the downlink data of downlink unit bands 1 and 2 corresponding to the two pieces of downlink assignment control information, the downlink data of downlink unit band 2 was received in a manner successful, a phase point of (0, j) is used. That is, in figure 9B, "N/A" and "D/A" are associated with the phase point (0, j) of the SR resource.
[000112] Further, when none of the downlink unit bands 1 and 2 corresponding to the two pieces of downlink assignment control information have been received, a phase point of (1, 0) is used. That is, in figure 9B, "N/N, "D/N" and "N/D" are associated with the phase point (1, 0) of the SR resource.
[000113] That is, in the transmission rule (mapping rule) illustrated in figure 9B (when the SR resource and the response signal have been generated simultaneously in the same subframe), a candidate success/failure pattern (result of error detection) of reception is associated with the phase point of the response signal in the SR resource, and different phase points in the SR resource are associated with pattern candidate groups which differ by at least one of the number of ACKs included in the pattern and the ACK position (i.e., the downlink unit band to which the successfully received downlink data is assigned) in the pattern. That is, in Fig. 9B, the candidate success/failure pattern (error detection result) of reception is associated with the phase point of the response signal in the SR resource, different phase points in the SR resource are associated with pattern candidate groups which differ in the number of ACKs included in the pattern, and different phase points in the SR resource are associated with pattern candidate groups which are equal in the number of ACKs included in the pattern, but differ in the ACK position ( that is, the downlink unit band to which the successfully received downlink data is assigned) in the pattern. Thus, even in the case where all the downlink data corresponding to the detected downlink assignment control information was successfully received, when the number of downlink data successfully received (the number of ACKs) is different or when the downlink unit band to which the successfully received downlink data has been assigned (the ACK position) is different, although the number of successfully received downlink data (the number of ACKs) is the same, different phase points in the SR resource are used for the response signal.
[000114] For example, in Fig. 9B, when the downlink data has been successfully received in all downlink unit bands ("A/A"), the phase point (1, 0) is used . Further, when downlink data has been successfully received in downlink unit band 1, but downlink data has failed to be received in downlink unit band 2 ("A/N" and "A/D" ), the phase point (0, -j) is used. Further, when the downlink data has failed to be received in downlink unit band 1, but the downlink data has been successfully received in downlink unit band 2 ("N/A" and "D/ A"), the phase point (0, j) is used. Also, when the downlink data has not been received at all in all of the downlink unit bands ("N/N", "D/N" and "N/D"), the phase point (-1 , 0) is used.
[000115] Here, the SR resource illustrated in Fig. 9B is notified by a separate signaling technique (eg higher layer signaling) from base station 100 to terminal 200. Thus, in Fig. 9B (" when SR and response signal are transmitted" illustrated in figure 8C), there is no limitation as in figure 9A ("when only response signal is transmitted", illustrated in figure 8B), and all three states "N/A" , "D/N" and "N/N" can be associated with the same resource and the same phase point (here, the phase point (1, 0)). Thus, in Fig. 9B, a total of four phase points are required for notification of all states (a total of 8 states illustrated in Fig. 9B) (8 failure/receive success patterns)).
[000116] That is, in figure 9A, due to the limitation, a total of 5 phase points is required for notification of all states (receipt success/failure patterns), and two ACK/NACK resources are required for the notification of the downlink unit bands response signals 1 and 2. On the other hand, in Fig. 9B, a single SR resource (PUCCH resource) can be used for simultaneous notification of the SR and the band response signals. downlink unit 1 and 2.
[000117] As described above, when the terminal 200 simultaneously transmits the SR and the answer signal, a mapping illustrated in Fig. 9B is used. Thus, even when channel selection is applied with a response signal transmission method, the number of SR resources can be reduced. For example, when Fig. 5A is compared to Fig. 8A, four PUCCH resources (SR resources and ACK/NACK resources) are needed in Fig. 5A, whereas three PUCCH resources (SR resources and ACK resources) /NACK) are needed in figure 8A. That is, in Fig. 8A, a PUCCH resource is cleared compared to Fig. 5A, so an increase in the uplink control channel (PUCCH) processing time can be suppressed.
[000118] In figure 9B, it should be noted that a case ("A/A" illustrated in figure 9B) in which all response signals for downlink unit bands 1 and 2 on the side of the terminal 200 are ACK and the cases ("N/N", "D/N" and "N/D" illustrated in Fig. 9B) in which all response signals for downlink unit bands 1 and 2 on the side of the terminal 200 are NACK or DTX are associated with phase points farthest from each other, among the phase points (4 phase points) which can be selected by the successful/failure pattern candidate group (error detection result).
[000119] That is, in Figure 9B, the states (the successful/failure candidate pattern group) of the response signals notified using adjacent phase points (ie, the phase points having a phase difference 90° (π/2 radiated)) in the SR resource are different from each other only in the receive status in a downlink unit band. For example, in the SR feature illustrated in Figure 9B, the "A/A" state reported using the phase point (-1, 0) and the "N/A" and "D/A" states reported using if the phase point (0, j) (having a phase difference of 90° with the phase point (1, 0)) are different from each other only in downlink unit band 1 reception status (CC1) . Similarly, in the SR feature illustrated in Figure 9B, the "A/A" state reported using the phase point (-1, 0) and the "A/N" and "A/D" states reported using -if the phase point (0, -j) (having a phase difference of 90° with the phase point (-1, 0)) are different from each other only in downlink unit band 2 reception status (CC2). This is applied similarly to the other phase points.
[000120] As a result, even when the phase point is wrongly decided, the base station side 100 (decision section 118) can suppress the number of erroneous unit bands in a retransmission control to a minimum, thereby minimizing a degradation in retransmission efficiency.
[000121] Further, when terminal 200 transmits only SR ("when only SR is transmitted" illustrated in Fig. 8D), terminal 200 transmits SR using the separately notified SR resource from base station 100 as illustrated in Figure 9B. At this time, the control section 208 of terminal 200 transmits the SR using the same phase point (1, 0) as the state (the reception success/fail pattern) in which everything is NACK (or DTX), which is illustrated in Figure 9B.
[000122] <Response and SR Transmission by Terminal 200: When There Are Three Downlink Unit Bands>
[000123] The following description will be made in relation to an example in which three downlink unit bands (downlink unit bands 1, 2 and 3) are regulated for the terminal 200. Here, an ACK/NACK resource ( PUCCH resource) associated with a downlink control information assignment resource used for a downlink assignment control information for downlink data transmitted in downlink unit band 1 is defined as an ACK resource / NACK 1. Further, an ACK / NACK resource (PUCCH resource) associated with a downlink control information assignment resource used for a downlink assignment control information for downlink data transmitted in the unit band Downlink 2 is defined as an ACK/NACK 2 resource. Further, an ACK/NACK resource (PUCCH resource) associated with a control information assignment resource. of downlink used for a downlink assignment control information for downlink data transmitted in downlink unit band 3 is defined as an ACK/NACK resource 3.
[000124] Still, in the following description, the base station 100 separately notifies the terminal 200 of an information related to two resources (the resources of SR 1 and 2 illustrated in Figure 10A) for transmission of an SR in a link unit band uplink illustrated in Fig. 4 (a regulated uplink unit band for terminal 200). That is, the control section 208 of the terminal 200 holds information relating to the SR resources notified from the base station 100.
[000125] Further, the terminal 200 specifies an ACK/NACK resource associated with a CCE, which is occupied by an antenna configuration information received by its own terminal, among a plurality of CCEs configuring downlink unit band PDCCHs 1, 2, and 3 as an ACK / NACK 1, 2, or 3 resource.
[000126] Here, in figure 10A, SR resources 1 and 2 and ACK / NACK resources 1, 2, and 3 are code resources different from each other, so that at least one of a ZAC sequence (primary broadcast) or a Walsh sequence / DFT sequence is different.
[000127] An operation of terminal 200 at this time is described in detail with reference to figures 11A and 11B. Here, ACK/NACK resources 1, 2, and 3 illustrated in Fig. 11A and SR resources 1 and 2 illustrated in Fig. 11B correspond to ACK/NACK resources 1, 2, and 3 and SR resources 1 and 2 illustrated in Figures 10A to 10D, respectively. In Figures 11A and 11B, for example, "A/N/N" represents a state in which a response signal corresponding to downlink unit band 1 (CC1) is ACK, but a response signal corresponding to downlink unit band downlink 2 (CC2) and the downlink unit band 3 (CC3) are NACK. Further, "N/D/D" represents a state in which a response signal corresponding to downlink unit band 1 (CC1) is NACK and it was difficult to detect a downlink assignment control information corresponding to downlink data transmitted in downlink unit band 2 (CC2) and downlink unit band 3 (CC3) (i.e. DTXs corresponding to downlink unit band 2 (CC2) and downlink unit band 3 (CC3)) . Further, in Fig. 11B, for example, "SR+A/N/N" represents a state in which "A/N/N" is transmitted using an SR resource.
[000128] First, when the terminal 200 transmits only the reply signal ("when only the reply signal is transmitted" illustrated in Fig. 10B), the terminal 200 performs a channel selection operation using the ACK/ NACK 1, 2, and 3 associated with CCEs occupied by downlink assignment control information corresponding to downlink data transmitted in downlink unit bands 1, 2, and 3, as illustrated in Fig. 11A. Specifically, the control section 208 of terminal 200 transmits the response signal using a transmission rule (a mapping rule) of the response signal illustrated in Fig. 11A based on a pattern (state) as to whether the data of downlink associated with downlink assignment control information corresponding to downlink data addressed to its own terminal, which was transmitted in downlink unit bands 1, 2, and 3, were successfully received (result of error detection).
[000129] Here, it should be noted that the states (D/D/A and D/D/N) in which DTXs were generated for downlink unit band 1 (CC1) and downlink unit band 2 (CC2 ) are all notified by ACK/NACK resource phase point 3, not by ACK/NACK resources 1 and 2 illustrated in Fig. 11A. This is because when the terminal 200 has not detected a downlink assignment control information corresponding to downlink data transmitted in downlink unit bands 1 and 2 (i.e., in the case of DTX), it is difficult to specify ACK resources / NACK to be used on the side of terminal 200. Similarly, the states (A/D/D and N/D/D) in which DTXs were generated for downlink unit band 2 (CC2) and the band downlink unit 3 (CC3) are all notified by the ACK / NACK 1 resource phase point 1. The states (D/A/D and D/N/D) in which DTXs were generated for the unit band of downlink 1 (CC1) and downlink unit band 3 (CC3) are all notified by ACK/NACK resource phase point 2. Further, a state where DTX was generated for downlink unit band 1 is notified by the phase points of ACK / NACK resources 2 and 3 other than ACK / NACK 1 resource illustrated o in Figure 11A. It is similarly applied to a state where DTX was generated for downlink unit bands 2 and 3. As described above, in the ACK / NACK feature, there is a limitation on a feature which can be used for notification of a state in which DTX was generated.
[000130] In figure 11A, if all seven states ("N/N/N", "N/N/D", "N/D/N", "N/D/D", "D/N/ N", and "D/N/D") where everything is NACK or DTX can be notified through the same resource and at the same phase point, a total of 8 phase points will be required for notification of all states ( a total of 26 states illustrated in Figure 11A (26 reception success/failure patterns)). That is, it is possible to reduce any of the three ACK/NACK resources illustrated in Fig. 11A. However, due to the limitation of the ACK/NACK resource, when the terminal 200 transmits only the response signal, as illustrated in Figure 10B, three ACK/NACK resources 1, 2, and 3 (i.e., resources whose number is equal that of downlink unit bands established for terminal 200) are required.
[000131] On the other hand, when the terminal 200 simultaneously transmits simultaneously transmits the SR and the reply signal in the same subframe ("when the SR and the reply signal are transmitted" illustrated in Fig. 10C), the terminal 200 transmits the signal using the SR feature notified separately from the base station 100 as illustrated in Fig. 11B. Specifically, the control section 208 of terminal 200 transmits the response signal using the transmission rule (the mapping rule) of the response signal illustrated in Fig. 11B, based on the pattern (state) as to whether corresponding downlink data to an antenna configuration information addressed to its own terminal were successfully received (error detection result).
[000132] Here, a description will be made regarding the transmission rule (the mapping rule) (figure 11B) of the response signal used when the SR and the response signal have been generated simultaneously in the same subframe ( "when the SR and the response signal are transmitted" illustrated in Fig. 10C).
[000133] In the transmission rule (the mapping rule) illustrated in Figure 11B (when the SR and the response signal were generated simultaneously in the same subframe), a candidate success/failure pattern (error detection result) reception is associated with the SR resource to which the response signal is assigned and the phase point of the response signal, and the SR resources and the phase points which differ by at least one between the SR resource and the phase point are associated with pattern candidate groups which differ by minus one of the number of ACKs included in the pattern and the ACK position (i.e., the downlink unit band at which downlink data is well received are assigned) in the pattern. That is, in Fig. 11B, the candidate success/failure pattern (error detection result) of reception with one pair of the SR resource and the phase point of the response signal, different pairs (pairs of the SR resource and of the phase points) are associated with pattern candidate groups which differ in the number of ACKs included in the pattern, and different pairs (SR resource and phase point pairs) are associated with pattern candidate groups which are equal in the number of ACKs included in the standard, but differ in the ACK position (i.e., the downlink unit band to which successfully received downlink data is assigned) in the standard. Thus, even in the case where all the downlink data corresponding to the detected downlink assignment control information was successfully received, when the number of downlink data successfully received (the number of ACKs) is different or when the downlink unit band to which successfully received downlink data has been assigned (the ACK position) is different, although the number of successfully received downlink data (the number of ACKs ) is the same, different SR features and different phase points are used for the response signal.
[000134] For example, in Fig. 11B, when the downlink data has been successfully received in all downlink unit bands ("A/A/A"), the phase point (-1, 0) of SR 2 resource is used. Further, when downlink data was successfully received in downlink unit bands 1 and 2, but downlink data was not successfully received in downlink unit band 3 ("A/A/N " and "A/A/D"), the phase point (-1, 0) of the SR 1 resource is used. Further, when downlink data was successfully received in downlink unit bands 1 and 3, but downlink data was not successfully received in downlink unit band 2 ("A/N /A" and "A/D/A"), the phase point (0, j) of the SR 2 resource is used. Further, when downlink data was successfully received in downlink unit band 1, but downlink data was not received in downlink unit bands 2 and 3 ("A/N/N", "A /N/D", "A/D/N", and "A/D/D"), the phase point (0, j) of the SR 1 resource is used. Further, when downlink data was not received in downlink unit band 1, but downlink data was successfully received in downlink unit bands 2 and 3 ("N/A/A" and "D/ A/A"), the phase point (0, -j) of the SR 2 resource is used. Also, when downlink data was not received in downlink unit bands 1 and 3, but downlink data was successfully received in downlink unit band 2 ("N/A/N", " N/A/D", "D/A/N", and "D/A/D"), the phase point (0, -j) of the SR 1 resource is used. Further, when downlink data was not received in downlink unit bands 1 and 2, but downlink data was successfully received in downlink unit band 3 ("N/N/A", "N/ D/A", "D/N/A", and "D/D/A"), the phase point (1, 0) of the SR 2 resource is used. Also, when downlink data was not received in all downlink unit bands ("N/N/N", "N/N/D", "N/D/N", "N/D/D" , "D/N/N", "D/N/D", and "D/D/N"), the phase point (1, 0) of the SR 1 resource is used.
[000135] Here, the SR resource illustrated in Fig. 11B is notified from base station 100 to terminal 200 beforehand, similarly to Fig. 9B. Thus, in Figure 11B ("when the SR and the response signal are transmitted" illustrated in Figure 10C), there is no limitation as in Figure 11A ("when only the response signal is transmitted" illustrated in Figure 10B), and all seven states ("N/N/N", "N/N/D", "N/D/N", "N/D/D", "D/N/N", and "D/N" /D") can be associated to the same resource and to the same phase point (in figure 11B, the phase point (1, 0) of the resource of SR 1). Thus, in Fig. 11B, a total of 8 phase points are required for notification of all states (a total of 26 states illustrated in Fig. 11B (26 reception success/failure patterns)).
[000136] That is, in Figure 11A, due to the limitation, a total of 10 phase points is required for notification of all states (receipt success/failure patterns), and three ACK/NACK resources are required for the notification of the response signals of the downlink unit bands 1, 2, and 3. On the other hand, in Fig. 11B, two SR resources (PUCCH resources) can be used for the notification of the SR and the response signals of the downlink unit bands 1, 2, and 3.
[000137] As described above, when the terminal 200 simultaneously transmits the SR and the answer signal, a mapping illustrated in Fig. 11B is used. Thus, even when channel selection is applied as a response signal transmission method, the number of SR resources can be suppressed. In Fig. 10A, two SR resources, which are one less resource than three ACK/NACK resources, are preferably prepared. That is, in Fig. 10A, five PUCCH resources (SR resources and ACK/NACK resources) are sufficient for SR transmission and response signal.
[000138] In figure 11B, it should be noted that the states (the successful/failure candidate pattern group) of the response signals reported using adjacent phase points (ie, phase points having a phase difference of 90° (π/2 radians)) in the same resource are different from each other only in the receive status in a downlink unit band. For example, in the SR 2 resource illustrated in Figure 11B, the state "A/A/A" is reported using the phase point (-1, 0) and the states "A/N/A" and "A/D/ A" notified using the phase point (0, j) (having a phase difference of 90° with respect to the phase point (-1, 0)) are different from each other only in the receive status of the link unit band descendant 2 (CC2). Similarly, in the SR 2 resource illustrated in Figure 11B, the "A/A/A" state is reported using the phase point (-1, 0) and the "N/A/A" and "D/A" states /A" notified using the phase point (0, -j) (having a phase difference of 90° with respect to the phase point (1, 0)) are different from each other only in the unit band receive status of downlink 1 (CC1). This is applied similarly to the other phase points.
[000139] As a result, similarly to Fig. 9B, even when the phase point is wrongly decided, the base station side 100 (decision section 118) can suppress the number of unit bands having an error of retransmission control to a minimum, thereby minimizing a degradation in retransmission efficiency.
[000140] Further, when terminal 200 transmits only SR ("when only SR is transmitted" illustrated in Fig. 10D), terminal 200 transmits SR using the same resource (SR resource 1) and the same phase point ( 1, 0) as in the state (receive success/failure pattern) where everything is NACK (or DTX), as illustrated in figure 11B.
[000141] As described above, according to the present modality, the control section 208 of the terminal 200 performs a transmission control of the SR and the response signal, based on the SR generation status and the standard regarding its data or not successfully received in the downlink unit band included in the regulated unit band group for its own terminal (error detection result). Further, when the SR and the response signal have been generated simultaneously in the same subframe, the control section 208 makes a PUCCH resource pair (SR resource) for notification of the response signal and the signal phase point. The response rate is different according to the number of successfully received downlink data (i.e., the number of ACKs) and the downlink unit band (i.e., the ACK position in the success/failure pattern of reception) to which successfully received downlink data has been assigned in each pattern (error detection result) of reception success/failure. That is, a pair of the PUCCH resource (SR resource) and the phase point of the response signal selected by terminal 200 differ according to the number of successfully received downlink data (i.e., the number of ACKs) and the downlink unit band (i.e., the ACK position in the reception success/failure pattern) to which successfully received downlink data was assigned in each reception success/failure pattern.
[000142] As a result, the base station 100, which is the receiving side of the response signal, can specify a combination of the downlink unit bands in which downlink data was successfully received, based on the resource of PUCCH through which the response signal was received and at the phase point of the response signal. Further, the terminal 200 changes the PUCCH resource (the ACK/NACK resource or the SR resource) and the transmission rule (the mapping rule) according to the SR generation status on the side of the terminal 200. At this time, when the SR and the response signal have been generated simultaneously in the same subframe, the terminal 200 notifies the response signal using all the phase points (constellation points) of the response signal. Thus, the number of SR resources required for SR notification and response signal can be reduced. That is, the number of SR resources to be notified from the base station 100 to the terminal 200 can be reduced. As described above, according to the present modality, even when channel selection is applied as a method of transmitting the response signal in LTE-A, the amount of an increase in the uplink control channel processing time ( PUCCH) can be suppressed, and the SR and the response signal can be transmitted simultaneously. (Mode 2)
[000143] In Mode 2, the terminal cancels the transmission of an ACK information in some of the downlink unit bands, in order to further reduce the processing time of the uplink control channel (PUCCH) if compared to Mode 1. That is, the terminal drops an ACK information on some downlink unit bands. Thus, in Modality 2, the processing time of the uplink control channel (PUCCH) can be further reduced compared to Modality 1.
[000144] A concrete description will now be made. The basic configurations of the base station and the terminal according to Modality 2 are the same as in Modality 1, and thus the description will be made with reference to figure 6 (base station 100) and to figure 7 (terminal 200). [Terminal 200 Operation: When There Are Three Downlink Unit Bands]
[000145] The following description will be made in relation to an example in which three unit downlink bands (unit downlink bands 1, 2, and 3) are regulated for the terminal 200. Here, similarly to the Modality 1, an ACK/NACK resource (PUCCH resource) ACK/NACK associated with a downlink control information assignment resource used for an antenna configuration information for downlink data transmitted in downlink unit band 1 is defined as an ACK/NACK resource 1. Further, an ACK/NACK resource (PUCCH resource) associated with a downlink control information assignment resource used for an antenna configuration information for downlink data transmitted in downlink unit band 2 is defined as an ACK/NACK 2 resource. Further, an ACK/NACK resource (PUCCH resource) associated with a control information assignment resource. of downlink used for an antenna configuration information for downlink data transmitted in downlink unit band 3 is defined as an ACK/NACK resource 3.
[000146] Further, in the following description, the base station 100 notifies the terminal 200 of information related to a resource (an SR resource illustrated in Fig. 12A) for the transmission of an SR in an uplink unit band regulated for terminal 200 by a separate signaling technique (e.g., higher layer signaling). That is, control section 208 of terminal 200 retains information relating to the SR resource notified from base station 100.
[000147] Further, the terminal 200 specifies an ACK/NACK resource associated with a CCE, which is occupied by an antenna configuration information received by its own terminal, among a plurality of CCEs configuring downlink unit band PDCCHs 1, 2, and 3 as an ACK / NACK 1, 2, or 3 resource.
[000148] Here, in Fig. 12A, an SR resource and the ACK / NACK resources 1, 2, and 3 are code resources different from each other, so that at least one of a ZAC (primary broadcast) sequence ) or a Walsh sequence / DFT sequence is different.
[000149] Next, a description will be made in relation to mapping examples 1 to 4 of the response signal at the terminal 200 for suppressing the number of SR resources to one, even when three unit bands of downlink (the unit bands of downlink 1 to 3) are set to terminal 200. <Mapping Example 1 (figures 13A and 13B)>
[000150] In the mapping example 1, when the SR and the response signal are transmitted simultaneously ("when the SR and the response signal are transmitted" illustrated in Fig. 12C), the terminal 200 decides a resource, for which the response signal is to be mapped, and a phase point according to an error detection result pattern in downlink unit band 1 (CC1) and downlink unit band 2 (CC2), regardless of the unit band downlink 3 (CC3) is or is not in the state of any one of ACK, NACK, and DTX. That is, the terminal 200 uses the mapping rule (figure 9B) used when there are two unit downlink bands in Modality 1. Here, it is assumed that the priorities, among the unit downlink bands 1 to 3, that the station base 100 uses for downlink data transmission, are regulated to be higher in an ascending order of downlink unit bands 1, 2, and 3.
[000151] Specifically, when only the response signal is transmitted ("when only the response signal is transmitted" shown in Fig. 12B), it is similar to Modality 1 (Fig. 11A), as shown in Fig. 13A.
[000152] On the other hand, when the SR and the response signal were generated simultaneously ("when the SR and the response signal are transmitted" illustrated in Figure 12C), pattern candidates (error detection result) of success / failure to receive the downlink unit band 1 (CC1) and the downlink unit band 2 (CC2) are associated with a phase point of the response signal in the SR resource as shown in Fig. 13B. That is, in Fig. 13B, a resource for transmitting the response signal and a phase point are decided regardless of the reception status of the downlink unit band 3 (CC3) at terminal 200. That is, the response signal for downlink unit band 3 is not actually notified from terminal 200 to base station 100 and abandoned. That is, downlink data transmitted from base station 100 to terminal 200 using downlink unit band 3 is necessarily retransmitted.
[000153] However, it is rare that the side of the terminal 200 simultaneously generates the SR and the response signal in the same subframe. Furthermore, although base station 100 has regulated three downlink unit bands for terminal 200, it is actually sufficient for base station 100 to transmit downlink data to terminal 200 using only one downlink unit band (e.g. downlink unit band 1 having a higher priority) in most cases, and thus base station 100 need not necessarily use downlink unit band 3. That is, there are fewer cases where base station 100 has to transmit downlink data for the terminal using downlink unit band 3. When these are taken into account, a possibility that the terminal 200 does not detect a downlink assignment control information in downlink unit band 3 is high ( that is, a possibility of DTX is high). Thus, as illustrated in Fig. 13B, although the terminal 200 does not transmit (drop) information related to the response signal for the downlink unit band 3, a retransmission efficiency is hardly affected.
[000154] Further, when terminal 200 transmits only SR ("when only SR is transmitted" illustrated in Fig. 12D), terminal 200 transmits SR using the same phase point (1, 0) as in a state (default success/failure) where all receive statuses for downlink unit bands 1 and 2 are NACK (or DTX), as illustrated in Fig. 13B.
[000155] Thus, in mapping example 1, only when the SR and the response signal are generated simultaneously in the same subframe, the terminal 200 (the control section 208) does not transmit (abandon) information related to the response signal. for some downlink unit bands (information related to the downlink unit band response signal 3 in Fig. 13B). That is, only when the SR and the response signal are generated simultaneously in the same subframe, the terminal 200 bundles ACKs for some downlink unit bands into NACK. Here, since the terminal 200 abandons the response signal for the downlink unit band having a low priority among the plurality of downlink unit bands regulated for the terminal 200, the abandonment of some response signals does not affect much the retransmission efficiency. Thus, in the manner described above, the processing time of the uplink control channel (PUCCH) can be reduced without decreasing the retransmission efficiency. <Mapping Example 2 (figures 14A and 14B)>
[000156] In the mapping example 2, when the SR and the reply signal are transmitted simultaneously ("when the SR and the reply signal are transmitted" illustrated in Fig. 12C), the terminal 200 bundles states in which the number of ACKs among pattern candidates (error detection result) of reception success/failure (states) is small, and the terminal 200 maps a bundling result to the same phase point as the SR resource. That is, when the SR and the response signal are transmitted simultaneously, the terminal 200 bundles pattern candidates (error detection result) of success/failure of reception (states) which are of relatively low probability of occurrence, and maps a bundling result to the same phase point as the SR resource.
[000157] Generally, base station 100 performs adaptive modulation so that an error rate (block error rate) of downlink data can range from around 10% to around 30%. For this reason, a probability that the terminal 200 will generate ACKs as a result of error detection in certain downlink data is higher than a probability that the terminal 200 will generate NACK. That is, a pattern (error detection result) of reception success/failure (state) which is large in the number of ACKs is a state in which a probability of occurrence is relatively high, and a pattern (detection result of error) of reception success/failure (state) which is small in the number of ACKs is a state in which a probability of occurrence is relatively low.
[000158] In this sense, when the SR and the reply signal have been generated simultaneously ("when the SR and the reply signal are transmitted" illustrated in figure 12C), the terminal 200 transmits a state in which the number of ACKs is one (a state in which the number of ACKs is small) using the same phase point (phase point (1, 0) of the SR resource in Fig. 14B) as a state in which everything is NACK (or DTX). That is, in Fig. 14B, terminal 200 bundles a state where the number of ACKs is one (a state where the number of ACKs is small) into a state where everything is NACK (or DTX).
[000159] On the other hand, the terminal 200 notifies states where the number of ACKs is 2 or 3 (a state where the number of ACKs is large) using different phase points in the SR resource, as illustrated in Fig. 14B. Here, in order to suppress the number of SR resources to one, some states ("N/A/A" and "D/A/A") among states in which the number of ACKs is 2 are also bundled into one state where everything is NACK (or DTX), as illustrated in Figure 14B. Here, similar to mapping example 1, the priorities among downlink unit bands 1 to 3 that base station 100 uses for downlink data transmission are regulated to be higher in a ascending order of downlink unit bands 1, 2, and 3. In this case, a state ("N (or D)/A/A") where the response signals for downlink unit bands 2 and 3 are ACK is of lower probability of occurring than other states ("A/A/N(or D)" and "A/N(or D)/A") where the number of ACKs is 2. That is, na Figure 14B, in order to suppress the number of SR resources for one, some states ("N/A/A" and "D/A/A"), which are of low probability of occurrence, among states in which the number of ACKs is 2 are also bundled in a state where everything is NACK (or DTX).
[000160] Thus, a state where the number of ACKs is 1 (and some of the states where the number of ACKs is 2) is not actually notified from terminal 200 to base station 100. That is, link data which were transmitted from base station 100 to terminal 200 using a downlink unit band whose response signal is ACK in a state where the number of ACKs is 1 (and some of the states where the number of ACKs is 2), they are necessarily retransmitted.
[000161] However, it is rare that the side of the terminal 200 simultaneously generates the SR and the response signal in the same subframe, similar to the mapping example 1. Still, as described above, a possibility that ACK is generated for certain downlink data is higher than a chance that NACK will be generated. When this is taken into account, although a state where the number of ACKs is 1 (and some of the states where the number of ACKs is 2), that is, a state where a probability of occurrence is low, is bundled into a state where everything is NACK (or DTX), a retransmission efficiency is hardly affected. Further, in mapping example 2, when terminal 200 transmits only the response signal ("when only the response signal is transmitted" shown in Fig. 12B), it is similar to Modality 1 (Fig. 11A), as shown in Fig. 14A . Further, when terminal 200 transmits only SR ("when only SR is transmitted" illustrated in Fig. 12D), terminal 200 transmits SR using the same phase point (1, 0) as in the state where everything is NACK ( or DTX) (and some of the states where the number of ACKs is 2), as illustrated in Fig. 14B.
[000162] As described above, in mapping example 2, only when the SR and the response signal were generated simultaneously in the same subframe, the terminal 200 (the control section 208) does not transmit ACK for some link unit bands downward. Specifically, terminal 200 (control section 208) bundles a state where the number of ACKs is small (the state where the number of ACKs is 1 in Fig. 14B) into a state where everything is NACK (or DTX) . Here, since the state where the number of ACKs is small is less likely to occur than the state where the number of ACKs is large, although the state where the number of ACKs is small is bundled in the state where everything is NACK (DTX), a retransmission efficiency is not much affected. Thus, in the manner described above, the processing time of the uplink control channel (PUCCH) can be reduced without decreasing the retransmission efficiency. <Mapping Example 3 (figures 15A and 15B)>
[000163] In the mapping example 3, when the SR and the response signal are transmitted simultaneously ("when the SR and the response signal are transmitted" illustrated in Figure 12C), among the pattern candidates (error detection result ) of success/failure of reception (states), terminal 200 bundles a state including ACK for downlink data transmitted using a downlink unit band which is not important to terminal 200 in a state where everything is NACK ( or DTX), and maps a bundling result to the same phase point of the same resource. That is, when the SR and the answer signal are transmitted simultaneously, the terminal 200 does not bundle a state including ACK for downlink data transmitted using a downlink unit band which is important to the terminal 200 in NACK, and performs a transmission using different phase points.
[000164] Here, examples of downlink unit band that is important to terminal 200 include (1) a downlink unit band into which a broadcast information (BCH) to be received by terminal 200 has been mapped, (2 ) a downlink unit band received when terminal 200 is initially connected to base station 100, i.e. before a communication with carrier aggregation begins, or (3) a downlink unit band which is explicitly notified from from base station 100 to terminal 200 as an important carrier (anchor carrier). In the following description, downlink unit band 1 (CC1) is assumed to be an important downlink unit band (e.g., an anchor carrier).
[000165] In this sense, when the SR and the response signal have been generated simultaneously ("when the SR and the response signal are transmitted" illustrated in Figure 12C), the terminal 200 bundles together ACKs for the downlink unit bands 2 and 3 (unimportant downlink unit bands) other than the important downlink unit band 1 in NACK. On the other hand, the terminal 200 notifies ACK and NACK for downlink data transmitted by using the important downlink unit band 1 (anchor carrier, CC1), using different phase points, as illustrated in Fig. 15B. That is, when the SR and the response signal have been generated simultaneously, the terminal 200 decides a resource for transmitting the response signal and a phase point, based only on the reception status of downlink unit band 1 (CC1) independently of the reception status of downlink unit band 2 (CC2) and unit downlink band 3 (CC3) at terminal 200 as shown in Fig. 15B.
[000166] Thus, the base station 100 can reliably decide which of the ACK and NACK was generated for downlink data transmitted using the important downlink unit band 1 (anchor carrier) at the terminal 200. The answer signal is transmitted ("when only the answer signal is transmitted" shown in Fig. 12B), as shown in Fig. 15A, base station 100 can decide the reception status by terminal 200 in all downlink unit bands, similarly to Modality 1 (figure 11A).
[000167] By the way, when the SR and the response signal were generated simultaneously, although ACK was generated in the downlink unit bands 2 and 3, there are several situations in which the base station 100 has difficulty deciding ACK and NACK (states reported using the phase point (1, 0) illustrated in figure 15B) occur.
[000168] However, similarly to mapping example 1, it is rare that the side of the terminal 200 simultaneously generates the SR and the response signal in the same subframe. Further, base station 100 transmits important information (e.g., higher layer control information) using the important downlink unit band 1 (anchor carrier). Thus, even when the terminal 200 simultaneously generated the SR and the response signal, the base station 100 can reliably decide ACK and NACK for the downlink unit band 1 (anchor carrier), and the terminal 200 can receive a important information with the small number of transmission times (the small number of transmission times). When this is taken into account, although it is usually difficult to notify base station 100 of information related to the response signal for unimportant downlink unit bands 2 and 3, depending on the circumstances, the influence on the system as a whole is small. .
[000169] In mapping example 3, when terminal 200 transmits only SR ("when only SR is transmitted" illustrated in Fig. 12D), terminal 200 transmits SR using the same phase point (1, 0) as a state in which the reception status of downlink unit band 1 is NACK or DTX (i.e., a state in which summation ACKs from unimportant downlink unit bands 2 and 3 are bundled into NACK), as illustrated in Fig. 15B .
[000170] Thus, in the mapping example 3, only when the SR and the response signal were generated simultaneously in the same subframe, the terminal 200 (the control section 208) does not transmit information related to some response signals to the downlink unit bands (unimportant downlink unit bands) other than an important downlink unit band (anchor carrier). Specifically, the terminal 200 bundles sums ACKs for downlink unit bands (non-important downlink unit bands) other than an important downlink unit band (anchor carrier) into NACK. Thus, when the SR and the response signal have been generated simultaneously in the same subframe, the terminal 200 preferably notifies the response signal to the important downlink unit band (anchor carrier) among a plurality of the downlink unit bands set to terminal 200. In the manner described above, the processing time of the uplink control channel (PUCCH) can be reduced without adversely influencing the system as a whole. <Mapping Example 4 (figures 16A and 16B)>
[000171] In the mapping example 4, when the SR and the response signal are transmitted simultaneously ("when the SR and the response signal are transmitted" illustrated in Fig. 12C), the terminal 200 decides a resource for which the signal of response is mapped and a phase point even from among the ACK/NACK resource as well as the SR resource.
[000172] Specifically, in figures 16A and 16B, when the SR and the reply signal have been generated simultaneously ("when the SR and the reply signal are transmitted" illustrated in Fig. 12C), a state where the number of ACKs is large (here, a state where the number of ACKs is 2 or more) is associated with a resource and a phase point which are different from other states, similarly to mapping example 2 (figure 14B). That is, the respective states (reception success/failure patterns (error detection result)) are associated with resources and phase points of the response signal, in order to avoid a state in which the number of ACKs is large be bundled in other states.
[000173] Further, in figures 16A and 16B, when the SR and the response signal were generated simultaneously ("when the SR and the response signal are transmitted" illustrated in figure 12C), ACK and NACK for a unitary band of Important downlink (here, downlink unit band 1 (e.g., an anchor carrier)) are associated with different resources and different phase points, similarly to mapping example 3 (Fig. 15B). That is, the respective states (reception success/failure patterns (error detection result)) are associated with resources and phase points of the response signal, in order to avoid ACKs for a downlink unit band importantly (here, downlink unit band 1 (for example, an anchor carrier)) is bundled in NACK.
[000174] At this time, the respective states (receipt success/failure patterns (error detection result)) are grouped into 6 types of states (6 candidate groups of success/failure pattern (error detection result) Front desk). Specifically, the respective states are grouped into 6 types of pattern candidate groups including "A/A/A", "A/A/N(D)", "A/N(D)/A", "A/N (D)/N(D)", "N(D)/A/A", and the other states, which are indicated by circles "o" illustrated in Figures 16A and 16B.
[000175] In this sense, when the SR and the response signal have been generated simultaneously ("when the SR and the response signal are transmitted" illustrated in Figure 12C), the terminal 200 transmits the response signal using phase points ( 0, -j) of the ACK/NACK resources 1 and 2 which are not used when only the reply signal is transmitted ("when only the reply signal is transmitted" illustrated in Fig. 12B) among the ACK/NACK resources 1 and 2 shown in Fig. 16A, plus 4 phase points of the SR resource shown in Fig. 16B. That is, the terminal 200 transmits information related to the response signal using a total of 6 phase points including 4 phase points of the SR resource illustrated in Fig. 16B, and 2 phase points (0, -j) of the ACK resources / NACK 1 and 2 illustrated in Figure 16A. In the manner described above, when the SR and the response signal have been generated simultaneously ("when the SR and the response signal are transmitted" illustrated in Figure 12C), although there are 6 groups of error detection result pattern, one Since the phase point which is not used by the ACK/NACK resource is used, the number of SR resources needed for the transmission of the SR and the response signal can be suppressed to one.
[000176] That is, when the SR and the response signal have been generated simultaneously ("when the SR and the response signal are transmitted" illustrated in Fig. 12C), the terminal 200 bundles only one state which is a state including ACK is unimportant downlink unit bands 2 and 3 and which is small in the number of ACKs (a state in which the number of ACKs is 1) in a state in which everything is NACK (or DTX).
[000177] Thus, when the SR and the response signal have been generated simultaneously ("when the SR and the response signal are transmitted" illustrated in Fig. 12C), the base station 100 can reliably decide a state in which the number of ACKs is large (here, a state where the number of ACKs is 2 or more) similar to mapping example 2, and can reliably decide the response signal for important downlink unit band (by example, an anchor carrier) similarly to mapping example 3.
[000178] Further, in mapping example 4, when the terminal 200 transmits only the response signal ("when only the response signal is transmitted" illustrated in figure 12B), it is similar to Modality 1 (figure 11A), as illustrated in figure 16A (black circles "•"). Further, when terminal 200 transmits only SR ("when only SR is transmitted" illustrated in Fig. 12D), terminal 200 transmits SR using the same phase point (1, 0) as in the state where everything is NACK ( or DTX) (and the state including ACK is dropped only when SR is generated), as illustrated in Fig. 16B.
[000179] As described above, in mapping example 4, when the SR and the response signal were generated simultaneously in the same subframe, the terminal 200 associates information related to the response signal for some downlink unit bands to the phase point which is not used by the ACK/NACK feature. As a result, the number of error detection result pattern candidates which can be decided by the base station can be increased, without increasing the number of SR resources. That is, the number of ACKs dropped by terminal 200 (the number of ACKs bundled in NACK) can be reduced. That is, the influence on the retransmission efficiency caused by the abandonment of the response signal at the terminal side 200 can be further reduced as compared to mapping examples 2 and 3. In the manner described above, the processing time of the channel. uplink control (PUCCH) can be reduced without decreasing retransmission efficiency.
[000180] The response signal mapping examples at terminal 200 have been described above.
[000181] In the manner described above, according to the present embodiment, by abandoning the ACK information in some downlink unit bands at terminal 200, the processing time of the uplink control channel (PUCCH) can be further reduced , if compared to Mode 1.
[000182] The embodiments of the present invention have been described above.
[000183] The above arrangements have been described with respect to an example in which all ACK/NACK resources are notified in association with CCEs occupied by downlink assignment control information for the terminal (i.e., implicitly), although the present invention is not limited thereto. For example, the mapping rule for the response signal in Fig. 11A can be applied to the case where some of the ACK/NACK resources are explicitly notified to the base station as illustrated in Figs. 17A and 17B. Figure 17B is identical to Figure 11B. However, in Fig. 17A, since the ACK/NACK 2 resource is explicitly notified, the terminal side already knows the ACK/NACK 2 resource information regardless of whether the terminal has successfully received the downlink assignment control information. Thus, the terminal can map the state, such as "N/D/A" or "D/D/A" (i.e., the state in which DTX was generated for the downlink unit band 2) to the ACK/NACK 2. That is, even when three downlink unit bands are regulated for the terminal, the number of ACK/NACK resources required for transmitting just the reply signal at the terminal can be reduced to two, if compared to Figure 11 (three ACK / NACK resources).
[000184] The above modalities have been described in relation to the example in which the ZAC sequence is used for a primary broadcast in the PUCCH resource, and the Walsh sequence and the DFT sequence are used for a secondary broadcast as OC indices. However, in the present invention, non-ZAC sequences which are mutually separable by different cyclic shift indices can be used for primary diffusion. For example, a generalized hum-like (GCL) sequence, a constant zero amplitude autocorrelation sequence (CAZAC), a Zadoff-Chu (ZC) sequence, a pseudo noise (PN) sequence such as a M-sequence or an orthogonal Gold code sequence, a sequence which is randomly generated by a computer and has a steep autocorrelation characteristic on the time axis, or similar, can be expressed as the "base sequence" in English, the which means a base sequence to provide a cyclic shift. Furthermore, sequences orthogonal to each other or any sequences which are recognized as being substantially orthogonal to each other can be used as OC indices for secondary diffusion. In the above description, a feature of a response signal (eg a PUCCH feature) is defined by a cyclic shift index of a ZAC sequence and a sequence number for an OC index.
[000185] Still, the above modalities have been described in relation to the example in which a secondary broadcast is performed after a primary broadcast, as a processing order on the terminal side. However, a primary broadcast and secondary broadcast processing order is not limited to this. That is, since primary broadcast and secondary broadcast are the processing represented by multiplication, for example, even when a primary broadcast is performed on the response signal after a secondary broadcast, the same effect as in the present embodiment is obtained.
[000186] Further, the above modalities have been described with the example in which the control section 101 of the base station 100 performs a control so that downlink data and a downlink assignment control information for the downlink data are mapped to the same downlink unit band, although the present invention is not limited thereto. That is, even when the downlink data and the downlink assignment control information for the downlink data are mapped into separate downlink unit bands, the present modality can be applied as long as a called party relationship between the downlink assignment control information and the downlink data is clear. In this case, the terminal side obtains the ACK/NACK resource 1 as a PUCCH resource corresponding to "a resource (CCE) occupied by the downlink assignment control information for downlink data transmitted over the link unit band descendant 1".
[000187] Still, the above modalities have been described in relation to the example in which the response signal transmitted by the terminal is modulated using a quadrature phase shift (QPSK) keying scheme. However, the present invention is not limited to the case in which the response signal is modulated using the QPSK scheme, and can be applied, for example, even when the response signal is modulated using the BPSK scheme or a 16 quadrature amplitude modulation (QAM).
[000188] Still, the above modalities were described in relation to the example in which the present invention is implemented in hardware, although the present invention can be implemented in software.
[000189] The function blocks used for the description of the above modalities are typically implemented as a large scale integration (LSI) which is an integrated circuit (IC). Function blocks can be individually implemented as a chip, or some or all of the function blocks can be implemented as a chip. Here, "LSI" is adopted, but this may also be referred to as "IC", "system LSI", "superLSI", or "ultraLSI", depending on a difference in integration.
[000190] A circuit integration technique is not limited to LSI, and an implementation by a dedicated circuit or a universal processor can be adopted. After LSI fabrication, a field programmable gate array (FPGA), which is a programmable or reconfigurable processor in which circuit cell connections and settings in an LSI can be reconfigured, can be used.
[000191] Also, if a circuit integration technique to replace LSI by another advanced technique or one derived from a semiconductor technology emerges, the functional blocks can be integrated using the technique. There may be a possibility of application in biotechnology.
[000192] The disclosure of Japanese Patent Application No. 2008230727, filed October 2, 2009, including the descriptive report, drawings and abstract, is incorporated herein by reference in its entirety. Industrial Applicability
[000193] A terminal apparatus and a relay method according to the present invention are useful in simultaneously transmitting an SR and a response signal, while suppressing an increase in processing time of an uplink control channel, when a channel selection is applied as a method of transmitting a response signal, when a carrier aggregation communication is performed using a plurality of downlink unit bands. REFERENCE LISTING 100 base station 101 control section 102 control information generation section 103, 105 coding section 104, 107, 213 modulation section 106 data transmission control section 108 mapping section 109, 216 IFFT section 110 , 217 CP add section 111 , 218 radio transmit section 112 , 201 receive section 113 , 202 CP remove section 114 PUCCH extract section 115 concentration section 116 sequence control section 117 processing section correlation 118 decision section 119 retransmission control signal generation section 200 terminal 203 FFT section 204 extract section 205, 209 demodulation section 206, 210 decoding section 207 decision section 208 control section 211 CRC section 212 response signal generation section 214 primary broadcast section 215 secondary broadcast section

权利要求:
Claims (30)
[0001]
1. Terminal configured with one or more downlink component carriers comprising: a control information detection section configured to detect downlink assignment information indicating a resource for downlink data, which is assigned to each. the downlink component carriers; a decoding section configured to decode the downlink data that is transmitted on the resource indicated by the detected downlink assignment information; and a transmission control section configured to transmit a response signal for the decoded downlink data and to transmit a scheduling request (SR), characterized in that: the response signal denotes a result of the decoding of the data. downlink, or denotes a DTX representing that the result is not transmitted; when downlink component carriers including a first downlink component carrier and a second downlink component carrier are configured, response signals for a plurality of downlink data on the downlink component carriers are transmitted; when response signals are transmitted, response signals are transmitted using a phase point and one of uplink control channel resources for response signal depending on a result of decoding each of the plurality of downlink data ; and when both the response signals and the SR are transmitted in the same subframe, the response signals are transmitted using a phase point and an uplink control channel resource for SR depending on a decoding result of each of the plurality of downlink data.
[0002]
2. Terminal, according to claim 1, characterized in that when both the response signals and the SR are transmitted in the same subframe, phase points, with which each of the response signals denotes a decoding failure or to DTX, are the same.
[0003]
3. Terminal, according to claim 1 or 2, characterized in that when both the response and the SR signals are transmitted in the same subframe, phase points, in which a number of response signals denoting a decoding success is equal and a downlink component carrier of downlink data that is successfully decoded is equal, is equal.
[0004]
4. Terminal, according to any one of claims 1 to 3, characterized in that when both the response and SR signals are transmitted in the same subframe, phase points, at least part of the response signals are grouped.
[0005]
5. Terminal, according to any one of claims 1 to 4, characterized in that when both the response and SR signals are transmitted in the same subframe, phase points, with which each of the response signals denotes a decoding failure or DTX, and phase point, with which one of the response signals denotes a decoding success, are equal.
[0006]
6. Terminal, according to any one of claims 1 to 5, characterized in that the downlink assignment information is transmitted from a base station in a control channel element (CCE), and a index of uplink control channel resource for response signal is associated with a CCE number.
[0007]
7. Terminal, according to any one of claims 1 to 6, characterized in that the downlink assignment information is transmitted from a base station in a control channel element (CCE), and an index of the uplink control channel resource for response signal is associated with a number of CCE, and an index of uplink control channel resource for SR is signaled from the base station.
[0008]
8. Terminal, according to any one of claims 1 to 7, characterized in that the downlink assignment information is transmitted from a base station in a control channel element (CCE), and an index of the uplink control channel resource for response signal is associated with a number of CCE, and an index of uplink control channel resource for SR is configured by upper layer.
[0009]
9. Terminal, according to any one of claims 1 to 8, characterized in that the decoding result is denoted by ACK or NACK.
[0010]
10. Terminal, according to any one of claims 1 to 9, characterized in that the DTX represents that the downlink assignment information for the downlink data is not detected.
[0011]
11. Terminal, according to any one of claims 1 to 10, characterized in that the phase point is a phase point in a BPSK modulation or QPSK modulation.
[0012]
12. Terminal according to any one of claims 1 to 11, characterized in that a combination of results of decoding the plurality of downlink data is associated with a phase point and an index of a control channel resource from uplink to response signal.
[0013]
13. Terminal according to claim 12, characterized in that the different combinations are respectively associated with different phase points and different resource indices of uplink control channel resources for response signal.
[0014]
14. Base station communicating with a terminal configured with one or more downlink component carriers comprising: a transmission section configured to transmit, to the terminal, downlink assignment information indicating a resource for downlink data, which is assigned to each of the downlink component carriers, and configured to transmit the downlink data to the terminal; a receiving section configured to receive a response signal for the decoded downlink data, which is transmitted from the terminal, and to receive a scheduling request (SR), which is transmitted from the terminal, characterized in that that: the response signal denotes a result of a decoding of the downlink data, or denotes a DTX representing that the result is not transmitted; when downlink component carriers including a first downlink component carrier and a second downlink component carrier are configured, response signals for a plurality of downlink data on the downlink component carriers are transmitted ; when response signals are transmitted, response signals are transmitted using a phase point and one of uplink control channel resources for response signal depending on a result of decoding each of the plurality of downlink data ; and when both the response signals and the SR are transmitted in the same subframe, the response signals are transmitted using a phase point and an uplink control channel resource for SR depending on a decoding result of each of the plurality of downlink data.
[0015]
15. Base station, according to claim 14, characterized by the fact that when both the response and the SR signals are transmitted in the same subframe, phase points, with which each of the response signals denotes a failure decoding or DTX are the same.
[0016]
16. Base station according to claim 14 or 15, characterized in that when both the response and the SR signals are transmitted in the same subframe, phase points, in which a number of response signals denoting a success of the decoding is equal and a downlink component carrier of downlink data that is successfully decoded is equal, is equal.
[0017]
17. Base station according to any one of claims 14 to 16, characterized in that when both the response and SR signals are transmitted in the same subframe, phase points, at least part of the response signals are grouped.
[0018]
18. Base station, according to any one of claims 14 to 17, characterized by the fact that when both the response and SR signals are transmitted in the same subframe, phase points, with which each of the signals response denotes a decoding failure or the DTX, and phase point, with which one of the response signals denotes a decoding success, are equal.
[0019]
19. Base station according to any one of claims 14 to 18, characterized in that downlink assignment information is transmitted from a base station on a control channel element (CCE), and an index of the uplink control channel resource for response signal is associated with a CCE number.
[0020]
20. Base station according to any one of claims 14 to 19, characterized in that the downlink assignment information is transmitted from a base station on a control channel element (CCE), and an uplink control channel resource index for response signal is associated with a number of CCE, and an uplink control channel resource index for SR is signaled from the base station.
[0021]
21. Base station according to any one of claims 14 to 20, characterized in that downlink assignment information is transmitted from a base station on a control channel element (CCE), and an uplink control channel resource index for response signal is associated with a number of CCE, and an uplink control channel resource index for SR is configured by upper layer.
[0022]
22. Base station, according to any one of claims 14 to 21, characterized by the fact that the result of the decoding is denoted by ACK or NACK.
[0023]
23. Base station according to any one of claims 14 to 22, characterized in that the DTX represents that the downlink assignment information for the downlink data is not detected.
[0024]
24. Base station according to any one of claims 14 to 23, characterized in that the phase point is a phase point in a BPSK modulation or QPSK modulation.
[0025]
25. Base station according to any one of claims 14 to 24, characterized in that a combination of results of decoding the plurality of downlink data is associated with a phase point and an index of a resource of uplink control channel for response signal.
[0026]
26. Base station according to claim 25, characterized in that the different combinations are respectively associated with different phase points and different resource indices of uplink control channel resources for response signal.
[0027]
27. A method of transmitting a response signal from a terminal configured with one or more downlink component carriers, the method comprising the steps of: detecting downlink assignment information indicating a resource for downlink data, which are assigned to each of the downlink component carriers; decoding the downlink data, which is transmitted on the resource indicated by the detected downlink assignment information; transmitting a response signal for the decoded downlink data; and transmitting a scheduling request (SR), characterized in that: the response signal denotes a result of decoding the downlink data, or denotes a DTX representing that the result is not transmitted; when downlink component carriers including a first downlink component carrier and a second downlink component carrier are configured, response signals for a plurality of downlink data on the downlink component carriers are transmitted; when response signals are transmitted, response signals are transmitted using a phase point and one of uplink control channel resources for response signal depending on a result of decoding each of the plurality of downlink data ; and when both the response signals and the SR are transmitted in the same subframe, the response signals are transmitted using a phase point and an uplink control channel resource for SR depending on a decoding result of each of the plurality of downlink data.
[0028]
28. Method for receiving a response signal transmitted from a terminal configured with one or more downlink component carriers, the method comprising the steps of: transmitting, to the terminal, downlink assignment information indicating a resource for downlink data, which is assigned to each of the downlink component carriers, and configured to transmit the downlink data to the terminal; receiving a response signal for the decoded downlink data, which is transmitted from the terminal; and to receive a scheduling request (SR), which is transmitted from the terminal, characterized in that: the response signal denotes a result of a decoding of the downlink data, or denotes a DTX representing that the result is not transmitted; when downlink component carriers including a first downlink component carrier and a second downlink component carrier are configured, response signals for a plurality of downlink data on the downlink component carriers are transmitted; when response signals are transmitted, response signals are transmitted using a phase point and one of uplink control channel resources for response signal depending on a result of decoding each of the plurality of downlink data ; and when both the response signals and the SR are transmitted in the same subframe, the response signals are transmitted using a phase point and an uplink control channel resource for SR depending on a decoding result of each of the plurality of downlink data.
[0029]
29. An integrated circuit for controlling a process at a terminal configured with one or more downlink component carriers, the process comprising the steps of: detecting downlink assignment information indicating a resource for downlink data, which is assigned to each of the downlink component carriers; decoding the downlink data, which is transmitted on the resource indicated by the detected downlink assignment information; transmitting a response signal for the decoded downlink data; and transmitting a scheduling request (SR), characterized in that: the response signal denotes a result of decoding the downlink data, or denotes a DTX representing that the result is not transmitted; when downlink component carriers including a first downlink component carrier and a second downlink component carrier are configured, response signals for a plurality of downlink data on the downlink component carriers are transmitted; when response signals are transmitted, response signals are transmitted using a phase point and one of uplink control channel resources for response signal depending on a result of decoding each of the plurality of downlink data ; and when both the response signals and the SR are transmitted in the same subframe, the response signals are transmitted using a phase point and an uplink control channel resource for SR depending on a decoding result of each of the plurality of downlink data.
[0030]
30. Integrated circuit for controlling a process at a base station communicating with a terminal configured with one or more downlink component carriers, the process comprising the steps of: transmitting, to the terminal, downlink assignment information indicating a resource for downlink data, which is assigned to each of the downlink component carriers, and configured to transmit the downlink data to the terminal; receiving a response signal for the decoded downlink data, which is transmitted from the terminal; and to receive a scheduling request (SR), which is transmitted from the terminal, characterized in that: the response signal denotes a result of a decoding of the downlink data, or denotes a DTX representing that the result is not transmitted; when downlink component carriers including a first downlink component carrier and a second downlink component carrier are configured, response signals for a plurality of downlink data on the downlink component carriers are transmitted; when response signals are transmitted, response signals are transmitted using a phase point and one of uplink control channel resources for response signal depending on a result of decoding each of the plurality of downlink data ; and when both the response signals and the SR are transmitted in the same subframe, the response signals are transmitted using a phase point and an uplink control channel resource for SR depending on a decoding result of each of the plurality of downlink data.

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法律状态:
2016-07-05| B25A| Requested transfer of rights approved|Owner name: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AME |

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2017-06-27| B25A| Requested transfer of rights approved|Owner name: SUN PATENT TRUST (US) |

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2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2020-02-27| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-03-17| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04W 28/04 , H04L 1/00 , H04L 1/16 Ipc: H04W 28/04 (2009.01), H04L 1/16 (2006.01), H04L 1/ |

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2021-04-06| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

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2021-07-06| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-08-24| 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 03/08/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |

优先权:

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申请号 | 申请日 | 专利标题

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JP2009230727|2009-10-02|

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JP2009-230727|2009-10-02|

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PCT/JP2010/004881|WO2011039923A1|2009-10-02|2010-08-03|Terminal device and retransmission control method|

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