COMMUNICATION DEVICE, COMMUNICATION DEVICE, METHOD FOR COMMUNICATION WITH A PLURALITY OF MOBILE COMM

专利摘要:
"Communication device, communication device, method for communicating with a plurality of mobile communication devices in a cellular communication system, method for communicating with a communication device of a cellular communication system and a computer program product". a communication system is presented in which a base station is provided for communicating with a plurality of mobile communication devices in a cellular communication system. the base station operates one or more communication cells and communicates subframes, with each of the plurality of communication devices within the cell (s), each comprising the communication resources of a control region to communicate a communication channel. control and communication capabilities of a data region to communicate a respective data channel. the base station communicates a control channel having a first sequence of dmrs in a control region of some subframes and a control channel having a second sequence of dmrs in a control region of other subframes. the second control channel can be transmitted on a radio beam that is spatially focused in one direction of a communication device. the first control channel can be transmitted omnidirectionally through the entire cell (s).
公开号:BR112013004877A2
申请号:R112013004877-8
申请日:2012-07-25
公开日:2021-03-16
发明作者:Yassin Aden Awad；Yasushi Maruta；Toshifumi Sato
申请人:Nec Corporation；
IPC主号:

专利说明:

“COMMUNICATION DEVICE, COMMUNICATION DEVICE, METHOD FOR COMMUNICATION WITH A PLURALITY OF MOBILE COMMUNICATION DEVICES IN A CELLULAR COMMUNICATION SYSTEM, METHOD FOR COMMUNICATION WITH APPLIANCE
COMMUNICATION OF A CELLULAR COMMUNICATION SYSTEM AND PRODUCT COMPUTER PROGRAM ”Technical field The present invention relates to mobile communication devices and networks, particularly but not exclusively those operating in accordance with the standards of the 3rd Generation Partnership Project (3GPPS) or equivalent or derived therefrom. The invention has particular but not exclusive relevance to the Long Term Evolution (LTE) of UTRAN (Universal Terrestrial Access Network for Evolved Radio (E-UTRAN)). Prior art It has been decided, as part of the 3GPP standardization process, that the downlink operation for system bandwidths beyond 20 MHz will be based on the aggregation of a plurality of component carriers at different frequencies. Such carrier aggregation can be used to support operation on a system with or without a contiguous spectrum (for example, a non-contiguous system can comprise component carriers at 800 MHz, 2 GHz, and 3.5 GHz). While a legacy mobile device may only be able to communicate using a single, backward compatible, component carrier, an advanced multi-port capable terminal would be able to simultaneously use multiple component carriers. Carrier aggregation can be particularly beneficial in a heterogeneous network (HetNet), even when the system's bandwidth is contiguous, and does not exceed 20 MHz because multiple carriers allow interference management between cells of different power classes as well as cells open access and closed subscriber group (CSG). The division of resources in the long term can be performed exclusively by dedicating carriers to a certain class of cell power (Macro / Pico / CSG). In addition, the need to manage interference between different cells operating on carriers of components of the same frequency in overlapping or overlapping geographic areas has led to the development of extension carriers (which are not backward compatible with legacy devices). extension carriers can be used as a tool for HetNet operation based on carrier aggregation and improved spectral efficiency.
A multi-port capable base station is capable of operating at least one of its carriers as an extension carrier, in which a control channel (eg, a channel carrying resource programming information such as the Link Control Channel Physical Descendant (PDCCH)), a Common Reference Signal (CRS) (sometimes referred to as a Cell-specific Reference Signal), and other information cannot be transmitted.
More specifically, an extension carrier cannot be used to transmit any of the following: a Physical Downlink Control Channel (PDCCH); a Physical Hybrid ARQ Indicator Channel (PHICH); º a Physical Control Format Indicator Channel (PCFICH); .º a Physical Transmission Channel (PBCH); .º a Primary Synchronization Signal (PSS); 30th a Secondary Synchronization Signal (SSS); or. a Common Reference Signal / Cell-specific Reference Signal (CRS). An extension carrier therefore comprises a carrier that cannot be operated as a single (independent) carrier, but must be a part of a set of component carriers where at least one of the carriers in the set is a carrier capable of being independent, the which can be used to transmit the programming information (and other control information) to the extension bearer.
Thus, when a first base station is operating a component carrier as an extension carrier, another base station can operate a component carrier of the same frequency to transmit a control channel, a CRS and other such information more reliably, on the same geographical area than the first base station, without significant interference because there is no corresponding control channel, CRS and other such information on the extension carrier operated by the first base station.
However, in communication systems in which extension carriers are employed, cross-carrier programming from the independent (inherited) component carrier can cause an increase in control channel blocking (PDCCH) and control channel capacity ( PDCCH) can become a limiting factor of the system performance.
This is because of the additional control channel signaling required to program resources on multiple component carriers.
Disclosure of the invention The invention therefore aims to provide a mobile communication system, a mobile communication device, a communication node and associated methods that overcome or at least alleviate the above problems.
According to an aspect of the present invention, a communication apparatus for communicating with a plurality of mobile communication devices is provided in a cellular communication system, the communication apparatus comprising: means for operating at least one communication cell; means for communicating a plurality of subframes with each of a plurality of communication devices within at least one cell, whereby: each subframe comprises a plurality of communication resources defining a control region for communicating a respective control channel and a plurality of communication resources defining a data region to communicate a respective data channel; and the communication means is operable to communicate: a first control channel having a first reference signal pattern (which can also be referred to as a 'sequence') in a control region of a first of the subframes; and a second control channel having a second reference signal pattern (sequence) in a control region of one second of the subframes, the second reference signal pattern (sequence) being different from the first reference signal pattern ( sequence).
The means for operating at least one communication cell can be operable to operate a first cell using a first component carrier and a second cell using a second component carrier, and the first subframe can be provided using the first component carrier and the second subframe can be provided using the second component carrier.
The second component carrier can be operated as an extension carrier. The first component carrier can be operated with an independent carrier. The communication medium can be operable to focus the second control channel spatially in a direction of a specific communication device.
The communication means can be operable to transmit the first control channel omnidirectionally across the entire at least one cell.
The communication apparatus may further comprise means for determining whether a specific communication device should receive a first control channel having the first reference signal pattern, or a second control channel having the second reference signal pattern.
The determination means can be operable to determine whether the specific communication device should receive the first control channel having the first reference signal pattern, or the second control channel having the second reference signal pattern, based on a location. of the communication device.
5 The determination means can be operable to determine whether the specific communication device should receive the first control channel having the first reference signal pattern, or the second control channel having the second reference signal pattern based on the location of the communication device in relation to additional communication device.
The determination means can be operable to determine the location of the communication device in relation to the additional communication device based on a result of a measurement of a parameter representing a distance from the communication device from the additional communication device.
The parameter representing a distance from the communication device from the additional communication device can comprise a received reference signal power (RSRP) from a signal transmitted by the additional communication device.
The determination means can be operable to determine that the specific communication device must receive the first control channel having the first reference signal pattern if a predefined message has been received from the specific communication device.
The determination means can be operable to determine that the specific communication device must receive the second control channel having the second reference signal pattern if an additional predefined message has been received from the specific communication device.
The determination means can be operable to determine whether the specific communication device should receive a first control channel having the first reference signal pattern, or the second control channel having the second reference signal pattern, depending on a report measurement received from the specific communication device.
The communication apparatus may comprise a plurality of distributed antennas. The communication means can be operable to communicate the first control channel having a first reference signal pattern using any of the plurality of antennas.
The communication means can be operable to communicate the second control channel having a second reference signal pattern using a subset comprising at least one, but not all, of the plurality of antennas.
The communication means can be operable to communicate a control channel having a third reference signal pattern in a third of the subframes using a subset comprising at least one, but not all, of the plurality of antennas, the third signal pattern being may be different from the first reference signal pattern and the second reference signal pattern.
The communication medium can be operable to communicate radio frames comprising a plurality of subframes, each subframe having a different respective subframe location, and the communication means can be operable: to communicate the first control channel having a first pattern reference signal in a subframe at a subframe location, within a radio frame, selected from a first set of subframe locations comprising at least one subframe location; and may be operable to communicate the second control channel having the second reference signal pattern in a subframe at a subframe location, within a radio frame, selected from a second set of subframe locations comprising at least one location of subframe. subframe; the first set of subframe locations may not comprise the same subframe locations as the second set of subframe locations.
The first control channel having a first reference signal pattern may not be communicated in a subframe at a subframe location of a multimedia transmission via a single frequency network subframe (MBSFN) and / or may not be communicated in a subframe in a subframe location of an almost empty subframe (ABS).
The second control channel having a second reference signal pattern can be communicated in a subframe at a subframe location of a multimedia transmission over a single frequency network (MBSFN). The second control channel having a second reference signal pattern can be communicated in a subframe of an almost empty subframe (ABS).
The control information communicated using the first and / or the second can represent an allocation of resources for a communication device. Each reference signal pattern may comprise a demodulation reference signal pattern '* DMRS'.
In accordance with an aspect of the present invention, a communication device for communicating with a communication device of a cellular communication system is provided, said communication device comprising: means for registering said communication device in at least one cell of communication operated by said communication device; means for receiving a plurality of subframes from said communication device, where: each subframe comprises a plurality of communication resources defining a control region for communicating a respective control channel and a plurality of communication resources defining a data region to communicate a respective data channel; and said receiving means is operable: to receive a first control channel having a first reference signal pattern in a control region of a first of said subframes; and to receive a second control channel having a second reference signal pattern in a second control region of said subframes, said second reference signal pattern may be different from said first reference signal pattern; and means for interpreting control information communicated on said first control channel having a first reference signal pattern, and for interpreting control information communicated on said second control channel having a second reference signal pattern.
The receiving means can be operable to receive the first subframe in a first component carrier of a first frequency band and the second subframe in the second component carrier of a second frequency band.
The second component carrier can be operated as an extension carrier.
The first component carrier can be operated as an independent carrier.
The receiving means can be operable to receive the second control channel in a radio beam focused spatially in one direction of the communication device.
The receiving means can be operable to receive the first control channel in a radio communication transmitted omnidirectionally across the entire at least one cell. the communication device may further comprise means for measuring a parameter representing a distance from the communication device from an additional communication device.
The parameter representing a distance from the communication device from the additional communication device can comprise a received reference signal power (RSRP) from a signal transmitted by the additional communication device.
the communication device may further comprise means for transmitting a predefined message to the communication device operating the cell depending on a measurement result of the parameter representing a distance from the communication device from the additional communication device.
The pre-defined message can comprise a measurement report including the measurement result.
The predefined message may comprise information representing an identity of the additional communication device and / or a cell operated by the additional communication device.
the communication device may additionally comprise means for comparing the parameter against a predetermined threshold value.
The transmission medium can be operable to transmit the pre-defined message if the comparison indicates that the parameter has risen above the limit value.
The transmission medium can be operable to transmit an additional predefined message if the comparison indicates that the parameter has fallen below the limit value.
The receiving means may be operable to receive radio frames comprising a plurality of subframes, each subframe having “a respective different subframe location within the radio frame, and the receiving means may be operable: to receive a first channel control having a first reference signal pattern in a subframe at a subframe location, within a radio frame, selected from a first set of subframe locations comprising at least one subframe location; and may be operable to receive a second control channel having a second reference signal pattern in a subframe at a subframe location, within a radio frame, selected from a second set of subframe locations comprising at least one subframe location; the first set of subframe locations may not comprise the same subframe locations as the second set of subframe locations.
The first control channel having a first reference signal pattern may not be received in a subframe at a subframe location of a multimedia transmission over a single frequency network (MBSFN) and / or may not be received in a subframe at a subframe location of an almost empty subframe (ABS). The second control channel having a second reference signal pattern can be received in a subframe at a subframe location of a multimedia transmission over a single frequency network (MBSFN). The second control channel having a second reference signal pattern can be received in a subframe of an almost empty subframe (ABS). The control information communicated using the first and / or the second can represent an allocation of resources to the communication device.
The reference signal pattern may comprise a demodulation reference signal pattern 'DMRS "'. In accordance with an aspect of the present invention, a method performed by a communication device is provided for communicating with a plurality of mobile communication devices in a cellular communication system, the method comprising: operating at least one communication cell; communicating a plurality of subframes with each of a plurality of communication devices within the at least one cell, each subframe comprising a plurality of resources communication region defining a control region for communicating a respective control channel and a plurality of communication resources defining a data region for communicating a respective data channel; communicating control information using a first control channel having a first signal pattern reference in a control region of one of the first subframes, and communicate information control statements using a second control channel having a second reference signal pattern in a control region of one second of the subframes, the second reference signal pattern being different from the first reference signal pattern.
According to an aspect of the present invention, a method, performed by a communication device, of communicating with a communication device of a cellular communication system, is provided: the method: registering the communication device in at least one operated communication cell by the communication device; receiving a plurality of subframes from the communication apparatus, each subframe comprising a plurality of communication resources defining a control region for communicating a respective control channel and a plurality of communication resources defining a data region for communicating a respective data channel; receiving a first control channel having a first reference signal pattern in a control region of a first of the subframes; interpret control information communicated on the first control channel having a first reference signal pattern; receiving a second control channel having a second reference signal pattern in a second control region of the subframes, the second reference signal pattern being different from the first reference signal pattern; and interpreting control information communicated on the second control channel having a second reference signal pattern.
In accordance with an aspect of the present invention, a computer program product is provided comprising instructions "operable to program a programmable processor to implement communication apparatus or a communication device as stated above.
In accordance with an aspect of the present invention, a communication apparatus is provided for communicating with a plurality of mobile communication devices in a cellular communication system, the communication apparatus comprising: means for operating at least one communication cell; means for communicating a plurality of subframes with each of a plurality of communication devices within at least one cell, where: each subframe comprises a plurality of communication resources defining a control region for communicating a respective control channel and a plurality communication resources defining a data region to communicate a respective data channel; and the communication means can be operable to communicate: control information using a first control channel having a first reference signal pattern in a control region of a first of the subframes; and control information using a second control channel having a second reference signal pattern in one of the second control and data regions of the second frames, the second reference signal pattern being different from the first signal pattern of reference.
In accordance with an aspect of the present invention, a communication device for communication with a communication device of a cellular communication system is provided, the communication device comprising: means for registering the communication device in at least one communication cell operated by the communication apparatus; means for receiving a plurality of subframes from the communication apparatus, whereby: each subframe comprises a plurality of communication resources defining a control region for communicating a respective control channel and a plurality of communication resources defining a data region to communicate a respective data channel; and the receiving means is operable to: receive a first control channel having a first reference signal pattern in a control region of a first of the subframes; and to receive a second control channel having a second reference signal pattern in at least one of a control region and a data region of a second of the subframes, the second reference signal pattern may be different from the first reference signal pattern; and means for interpreting control information communicated on the first control channel having a first reference signal pattern, and for interpreting control information communicated on the second control channel having a second reference signal pattern.
In accordance with an aspect of the present invention, a communication apparatus for communicating with a plurality of mobile communication devices is provided in a cellular communication system, the communication apparatus comprising: means for operating at least one communication cell; means for communicating a plurality of subframes with each of a plurality of communication devices within at least one cell, whereby: the means of communication is operable to communicate: control information using an omnidirectionally first control channel across the entire cell; and control information using a second control channel in a spatially focused direction against a communication device for which the control information is intended.
In accordance with an aspect of the present invention, a communication device for communication with a communication device of a cellular communication system is provided, the communication device comprising: means for registering the communication device in at least one communication cell operated by the communication apparatus; means for receiving a plurality of subframes from the communication device, whereby: the receiving means can be operable: to receive a first control channel omnidirectionally by the communication device through the entire cell; and to receive a second control channel transmitted in a spatially focused direction against the communication device; and means for interpreting control information communicated on the first control channel, and for interpreting control information communicated on the second control channel.
In accordance with an aspect of the present invention, a communication apparatus is provided for communicating with a plurality of mobile communication devices in a cellular communication system, the communication apparatus comprising: a cell controller adapted to operate at least one communication cell ; a transceiver operable to communicate a plurality of subframes with each of a plurality of communication resources defining a control region for communicating a respective control channel and a plurality of communication resources defining a data region for communicating a respective data channel ; and the transceiver may be additionally operable to communicate: control information using a first control channel having a first reference signal pattern from a first of the subframes; and control information using a second control channel having a second reference signal pattern in at least one of the control and data regions of a second of the subframes, the second reference signal pattern being different from the first reference pattern. reference signal.
In accordance with an aspect of the present invention, a communication device for communication with a communication device of a cellular communication system is provided, the communication device comprising: a cell registration module operable to register the communication device in at least a communication cell operated by the communication device; a transceiver operable to receive a plurality of subframes from the communication apparatus, whereby: each subframe comprises a plurality of communication resources defining a control region to communicate a respective control channel and a plurality of communication resources defining a region data to communicate a respective data channel; and the transceiver is additionally operable: to receive a first control channel having a first reference signal pattern in a control region of a first of the subframes; and to receive a second control channel having a second reference signal pattern in at least one of the control region and a second data region of the subframes, the second reference signal pattern being different from the first pattern reference signal; and a processor operable to interpret control information communicated on the first control channel having a first reference signal pattern, and to interpret control information communicated on the second control channel having a second reference signal pattern.
Aspects of the invention extend to computer program products such as computer-readable storage media having instructions stored therein that are operable to program a programmable processor to execute a method as described in the aspects and possibilities defined above or cited in the claims and / or to program a computer suitably adapted to provide the device mentioned in any of the claims.
Each feature disclosed in this specification (whose term includes the claims) and / or shown in the drawings can be incorporated into the invention independently (or in combination with) any other features disclosed and / or illustrated. In particular but without limitation, the characteristics of each of the claims dependent on a particular independent claim can be introduced into that independent claim in any combination or individually.
Brief description of the drawings Configurations of the invention will now be described by way of example only with reference to the attached figures in which: Figure 1 schematically illustrates a telecommunication system; Figure 2 illustrates a possible subframe configuration for carriers of components for the telecommunication system of figure 1; Figure 3 shows a simplified illustration of a resource grid for demodulation reference signals in the telecommunication system of figure 1; Figure 4 shows a simplified block diagram of a first base station for the telecommunication system of figure 1; Figure 5 shows a simplified block diagram of a second base station for the telecommunication system of figure 1; Figure 6 shows a simplified block diagram of a mobile communication device for the telecommunication system of Figure 1; Figure 7 shows a simplified flow diagram illustrating the operation of the telecommunication system of figure 1; Figure 8 schematically illustrates another telecommunication system; Figure 9 illustrates a possible subframe configuration for carriers of components for the telecommunication system of figure 8; Fig. 10 illustrates another possible subframe configuration for carriers of components for the telecommunication system of Fig. 8; Figure 11 schematically illustrates another telecommunication system; Figure 12 illustrates a possible subframe configuration for carriers of components for the telecommunication system of figure 10; Figure 13 schematically illustrates another telecommunication system; Fig. 14 illustrates a radio frame for the telecommunication system of Fig. 13; Figure 15 illustrates a number of possible configurations of subframes for carriers of components for the telecommunication system of figure 13; Figure 16 schematically illustrates another telecommunication system; e Figure 17 illustrates a number of possible configurations of subframes for carriers of components for the telecommunication system of figure 16.
Detailed description of exemplary configurations Overview Figure 1 schematically illustrates a mobile (cellular) telecommunication system 1 in which a user of any of a plurality of mobile communication devices 3-la 3-7 can communicate with other users via one or more than a plurality of base stations 5-1, 5-2 and 5-3. In the system illustrated in figure 1, each base station 5 shown is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) base station capable of operating a so-called macro base station ".
In figure 1, the base station labeled 5-1 comprises a so-called 'macro' base station operating a plurality of relatively geographically large 'macro' cells 7,
8 using respective component carriers (CCs) Cl, c2, from a set of component carriers.
In this configuration, the macro base station 5-1 operates the C1 component carrier with a primary component carrier in which a primary cell (PCell) 7 is provided, and the C2 component carrier as a secondary component carrier in which a cell secondary (SCell) 8 is provided.
PCell 7 has a greater geographic coverage than SCell 8. The difference in sizes of PCell 7 and SCell 8 may be by design (eg, as a result of using a lower transmission power for the C2 component carrier) ) or may result from one or more radio environmental factors affecting primary carrier C1 and secondary carrier C2 to different extents (eg, loss of trajectory affecting a lower frequency primary carrier Xl to a lesser extent than a secondary carrier higher frequency C2). Each of the other base stations 5-2, 5-3 shown in Figure 1 comprises a so-called "peak" base station operating on a plurality of 'peak' cells 9-2, 9-3, 10-2, 10-3, using a set of component carriers having component carriers (CCs) Cl, C2 corresponding in frequency to those used by the macro base station 5-1. Each peak base stations 5-2, 5-3 operates a respective primary peak cell (PCell) 9-2, 9-3 in the C2 component carrier and a respective secondary peak cell (SCell) 10-2, 10-3 in the carrier of component Cl.
Therefore, PCells pico 9 share substantially the same frequency band as Scell macro 8, and Scells pico 10 share substantially the same frequency band as PCell macro 7. As seen in figure 1, the power of carriers Cl, C2 used to provide the peak 9, 10 cells is defined such that the geographical coverage of the peak 9 PCells, in this example, is substantially coincident with the geographical coverage of the peak 10 SCells. The power used to provide the peak 9, 10 cells is low in in relation to the power used for macro cells 7, 8 and pico cells 9, 10 are therefore relatively small in relation to macro cells 7,8. As shown in figure 1, in this example the geographical coverage of each of the peak 9, 10 cells falls completely within the geographical coverage of PCell macro 7 and partially overlaps with the geographical coverage of Scell macro 8. Referring to figure 2, in which the subframe configuration for the component carriers for each of the cells is illustrated, it will be apparent that there is a potential for relatively high communication interference between the PCell macro 7 and each of the peak 10 SCells. The risk of interference is high because PCell macro 7 and SCells pico 10 operate in coincident geographic regions and use a common component carrier frequency.
Additionally, the power of the communication signals from the base station 5-l, in the geographical area covered by each SCell pico 10, can be comparable to communication signals from the respective base stations pico 5-2, 5-3 because of the relatively high power used by the macro base station 5-1 compared to that used by the peak base stations 5-2, 5-3. While there is also the potential for some interference between SCell macro 8 and each of the PCells pico 9, any such interference is likely to be relatively small and restricted to the relatively small geographic region in which SCell macro 8 and PCells pico 9 are located. overlap.
To alleviate the interference problem, the C2 component carrier used for SCell macro 8 is operated by the macro base station 5-1 as an extension carrier in which the nature of the information that can be transmitted is restricted.
Specifically, the component carrier, when operating as the extension carrier, may not be used for the transmission of any of the following: a Physical Downlink Control Channel (PDCCH);
. a Physical Hybrid ARQ Indicator Channel (PHICH); º a Physical Control Format Indicator Channel (PCFICH); .º a Physical Transmission channel (PBCH); 5th a Primary Synchronization Signal (PSS); .º a Secondary Synchronization Signal (SSS); or. a Common Reference Signal / Cell-Specific Reference Signal (CRS). The macro base station 5-1 operates the Cl carrier for PCell 7 as an independent carrier having a Physical Downlink Control Channel (PDCCH), which can be used to program the features of its own Cl carrier (as shown by the arrow X). The component carrier PDCCH Cl can also be used to program the component carrier C2 features ('cross carrier programming') to be used for communication purposes by a mobile communication device 3 when operating on the SCell macro 8 (such as shown by the arrow Y). The PDCCH is transmitted omnidirectionally across the entire cell.
The respective Cl component carrier used for each of the pico 10 SCells is also operated as an extension carrier by the associated peak base stations 5-2, 5-
3. The respective C2 component carrier used for each of the pico 9 PCells is operated, by the associated pico base stations 5-2, 5-3, as an independent carrier having an associated PDCCH to program resources within its own component carrier C2 (as shown by the arrow X '). This PDCCH can also be used for cross-carrier programming features of component carrier C1 to be used for communication purposes by a mobile communication device 3 when operating on the associated SCell peak 10 (as shown by the arrow Y ').
As illustrated in figures 1 and 2, in this configuration although a PDCCH is not provided in the extension carriers, a Downlink Control Channel
Beam Formed Physical (PDCCH BFed) 4-1, 4-2, 4-5 is provided using the SCell macro 8 C2 extension component carrier. The PDCCH BFed 4-1, 4-2, 4-5 is directional and can be used selectively to program features of the C2 extension component carrier for SCell macro 8 (as shown by the Z arrow) for specific mobile communication devices 3. The PDCCH BFed is used in conjunction with frequency selective programming in which the mobile communication device reports channel status information (CSI) such that the channel quality indicator (CQI) for each resource block (RB) or RBS group in the system and station bandwidth frequency domain base select the best resource blocks to use to program the PDCCH BFed for each terminal.
In this exemplary configuration, a PDCCH BFed is not provided for the Cl extension member of the SCells pico 10-2, 10-3. Instead, each peak 5-2, 5- 3 base station operates its respective component carrier of extension CI as a component carrier completely without PDCCH as shown in figure 2. The PDCCH of the primary component carrier Cl, operated by the base station 5-l, can therefore be used to program resources (eg, as shown by arrow 7Y) for a mobile communication device 3-7, located in SCell macro 8, but which is in close proximity to a geographical PCell peak 9-2 being operated at least with a C2 component carrier than the SCell macro & 8. Consequently, interference between SCell macro 8 and PCll pico 9-2 is avoided because, although SCell macro 8 and PCell pico 9-2 are being operated using the same component carrier frequency band (C2), the information control cells for each cell are transmitted using a different respective component carrier frequency band.
The PDCCH BFed 4-1, 4-2, 4-5 of the C2 extension component carrier for SCell macro 8 can be used selectively to program resources for a respective mobile communication device 3-1, 3-2, 3- 5, operating within the SCell macro 8, but which is not geographically close to one of the PCells pico 9-2, 9-3. Consequently, where interference is not a significant risk, the PDCCH capacity of the Cl component carrier used for the PCell macro 7 can beneficially be conserved without significantly affecting interference.
For smaller peak cells in which the control channel capacity is not so worrying, the PDCCH of the respective component carrier C2 operated by each peak base station 5-2, 5-3, can be used for cross carrier programming and features for any 3-3, 3-4 mobile communication device located on the respective SCell pico 10-2, 10-3. As described above, pico cells are located geographically entirely within the region covered by the PCell macro 7. Consequently, the absence of a PDCCH BFed, for the Cl component carrier operated by each pico 5-2, 5-3 base station, avoids the interference that could otherwise potentially result with the PDCCH of the PCell component carrier C1 macro.
Beam-Shaped Physical Downlink Control Channel (PDCCH BFed) A possible implementation of a PDCCH BFed will now be described in more detail.
The beam formation of the PDCCH BFed 4-1, 4-2, 4-5 is achieved using a multilayer beam formation solution that is suitable for a multiple input multiple output (MIMO) communication system in which transmitters and signal receivers have multiple antennas.
Beam formation is achieved using a pre-coding technique in which the phase (and possibly gain) of each signal stream transmitted from each of the plurality of antennas is weighted independently such that the power of each signal stream is focused on the direction of interest (eg, that of the mobile communication device for which the PDCCH BFed is intended) to maximize the signal level. Similarly, the power of each signal stream is minimized in other directions, including directions in which interference is a potential problem (eg, that of peak cells 9, 10).
To successfully beam, the channel state is analyzed based on Channel State Information (CSI) measured by the mobile communication devices 3 and reported to the macro base station 5-1l. CSIs comprise “information such as a rating indicator (RI), pre-coding matrix indicator (PMI), a channel quality indicator (COI) and / or the like. Based on this information, an appropriate type of beam formation is selected. For example, where complete CSI's are reliably available, a statistical eigenvector beam formation technique can be used. In situations where more limited CSI are available, an interpolation technique can be used to estimate the CSI for beam formation. In situations where no CSI is available, CSI can be estimated blindly at the base station, for example from received signal statistics or uplink signals received from the terminal.
Figure 3 shows a resource grid for an orthogonal frequency division multiplexing (OFDM) subframe 30 for the communication system 1 of figure 1, in which a PDCCH BFed is provided. The resource grid shown is for a pair of resource blocks (RB) each RB having, for example, a resource grid similar to that described in section 6.2 of Technical Standard (TS) 36.211 V10.2.0 of the 3rd Generation Partnership Project (3GPP) and shown in figure 6.2.2-1 of that standard.
As seen in figure 3, the PDCCH BFed transmission is provided in a set of resource elements 35 in a control region 31 of subframe 30. The control region 31 comprises resource elements 35 of the first three OFDM symbols of the first interval of the subframe 30, and covers all twelve subcarrier frequencies of a resource block (RB). the remaining resource elements 35 of the first interval and resource elements 35 of the second interval form a data region 33 in which the Physical Downlink Shared Channel (PDSCH) is transmitted.
A set of EU-specific PDSCH demodulation reference (DMRS) signals and EU-specific PDCCH BFed DMRS are provided in data region 33 and control region 31 respectively as illustrated.
The DMRS standard for the PDCCH BFed is different from that used for an inherited PDCCH.
In the DMRS standard shown in figure 3, the DMRS PDSCH for antenna ports 7 and 8 are transmitted on resource elements 35 on three uniformly distributed subcarrier frequencies, in each of the last two symbols of the first interval and in each of the last two second interval symbols.
The PDCCH DMRS for antenna ports 9 and 10 are also transmitted on resource elements 35 on three evenly distributed subcarrier frequencies (different from those used for ports 7 and 68), in each of the last two symbols of the first interval and in each of the last two symbols of the second interval.
The PDCCH DMRS for antenna ports x1 and x2 are transmitted on resource elements 35 on three uniformly distributed subcarrier frequencies, in each of the first two symbols of the first interval.
The PDCCH DMRS for antenna ports x3 and x4 are transmitted on the resource elements on three uniformly distributed subcarrier frequencies (different from those used for ports 35 x3 and x4), in each of the first two symbols of the first interval.
Macro base station
Figure 4 is a block diagram illustrating the main components of the macro base station 5-1 shown in figure 1.
The macro base station 5-1 comprises a base station capable of multi-port E-UTRAN comprising a transceiver circuit 431 that is operable to transmit signals to, and to receive signals from, mobile communication devices 3 via a plurality of antennas 433. A base station 5-1 is also operable to transmit signals to and receive signals from a core network via a 435 network interface. The operation of transceiver circuit 431 is controlled by a controller 437 according to software stored in memory 439. The software includes, among other things, an operating system 441, a communication control module 442, a component carrier management module 443, a measurement management module 445, a control channel management module 446, a control module direction determination 447, a feature programming module 448, and a beam forming module 449 The communication control module 442 is operable to control communication with the mobile devices 3 in the component carriers (CCs) Cl, C2, of their set of component carriers.
The component carrier management module 443 is operable to manage the use of the component carriers Cl, c2 and, in particular, the configuration and operation of the PCell macro 7 and SCell macro 8 and the operation of the secondary component carrier C2 for the SCell 8 as an extension carrier.
The measurement management module 445 communicates with the mobile communication device 3 to configure the mobile communication device 3 to start the measurement of the CSI and to receive and analyze measurement reports received from the mobile communication devices 3 to assess the status of channel for the purpose of beam formation.
Direction determination module 447 determines the directional position of a mobile communication device 3, relative to base station 5-1, for beam forming purposes, from the uplink signals that base station 5-1 receives from the mobile communication device 3. The resource programming module 448 is responsible for programming the resources of the primary component and extension Cl, C2 to be used by the mobile communication devices 3 operating in the macro cells 7, 8. The beam forming module 449 manages the formation of the directional "beam" via which the PDCCH BFed 4-1, 4-2, 4-5 is provided for the respective mobile communication devices 3-1, 3-2, 3 -5. In this exemplary configuration, the control channel management module 446 determines which control channel to use to program resources for the SCell macro 8 C2 extension bearer based on trigger messages received from the mobile communication device 3. These trigger indicates whether a mobile communication device is within range of a peak 5-2, 5-3 base station or whether a mobile communication device 3 is no longer within the range of a peak 5-2, 5- base station 3. Specifically, if a mobile communication device 3 has not issued a trigger message indicating that it is within range of a peak base station 5-2, 5-3, or if it has issued a trigger message indicating that it is no longer within of the range of a peak 5-2, 5-3 base station, then the control channel management module 446 determines that the mobile communication device 3 should receive resource programming for the SCell macro 8 extension holder C2 via a PDCCH BFed provided in the C2 extension holder. If a mobile communication device 3 has issued a trigger message indicating that it is within the range of a peak base station 5-2, 5-3, then the control channel management module 446 determines that the mobile communication device 3 must receive resource programming for the C2 extension bearer of the
Scell macro 8 via a PDCCH provided in the primary component carrier Cl of PCell macro 7. In the above description, base station 5-1 is described for ease of understanding as having a number of discrete modules.
Although these modules can be provided in this way for certain applications, for example where an existing system has been modified to implement the invention, in other applications, for example in systems designed with inventive features in mind from the start, these modules may not be discernible as discrete entities.
Peak base station Figure 5 is a block diagram illustrating the main components of a peak base station 5-2, 5-3 shown in figure 1.
Each peak station 5-2, 5-3 comprises a base station capable of multi-port E-UTRAN comprising a transceiver circuit 531 which is operable to transmit signals to, and receive signals from, mobile communication devices 3 via at least one antenna. 533. Base stations 5-2, 5-3 are also operable to transmit signals to and receive signals from a core network via a network interface 535. The operation of transceiver circuit 531 is controlled by a controller 537 according to with software stored in memory 539. The software includes, among other things, an operating system 541, a communication control module 542, a component carrier management module 543, a cell type identifier module 547, and a resource programming 548. The communication control module 542 is operable to control the communication with the mobile communication devices 3 in the component carriers (CCs) Cl, C2, of its port set component painters.
The component carrier management module 543 is operable to manage the use of the component carriers Cl, C2 and in particular the configuration and operation of the PCell pico 9 and SCell pico 10 and the operation of the secondary component carrier Cl for the SCell 10 as an extension bearer.
Cell type identifier module 547 provides information to identify cells controlled by base stations 5-2, 5-3 as peak cells 9, 10. This information is provided for mobile communication devices 3 that enter within or near de) the coverage area of PCell pico 9. In this exemplary configuration, for example, cell type identifier module 547 transmits information identifying the cells it controls are pico cells.
The resource programming module 548 is responsible for programming the resources of the primary component and extension C2, Cl carriers to be used by the mobile communication devices 3 operating in the peak 9 cells. In the above description, the base station 5-2, 5-3 is described for ease of understanding as having a number of discrete modules.
Although these modules can be provided in this way for certain applications, for example where an existing system has been modified to implement the invention, in other applications, for example in systems designed with inventive features in mind from the beginning, these modules can be built in. of the system or global operational code and so these modules may not be discernible as discrete entities.
Mobile communication device Figure 6 is a block diagram illustrating the main components of the mobile communication devices 3 shown in figure 1. Each mobile communication device 3 comprises a mobile (or 'cell' phone) capable of operating in a multi-port environment .
The mobile communication device 3 comprises a transceiver circuit 651 which is operable to transmit signals to, and receive signals from, base stations 5 via at least one antenna 653. The operation of transceiver circuit 651 is controlled by a controller 657 according to software stored in memory 659. The software includes, among other things, an operating system 661, a communication control module 662, a measuring module 665, and a cell identification module 667, a proximity detection module 668, and a resource determination module
669. The communication control module 662 is operable to manage communication with base stations 5 in the carriers of associated components (CCs) Cl, C2. The measurement module 665 receives measurement configuration information from base station 5-1 for the purpose of configuring the mobile communication device 3 to take measurements from the CSI. The measurement module 665 manages the performance of the CSI measurements (eg, for macro cells 7, 8), generates associated measurement reports and transmits the generated reports to the macro base station 5-1. The measurement module 665 also determines the received reference signal power (RSRP) for the peak cells 9, 10 for use in determining the proximity of the mobile communication device 3 to the peak cells. The cell identification module 667 is operable to determine the type of cell, into which the mobile communication device 3 enters, or arrives geographically close to, from information provided by base stations 5-2, 5-3, controlling that cell. In this exemplary configuration, for example, cell identification module 667 is operable to receive information to identify the type of cell that is transmitted by a peak base station 5-2, 5-3, and to identify the type of cell to be be a peak cell from the information received. The cell proximity detection module 668 uses RSRP measurements from the PCells pico 9 cells to determine the proximity of the mobile communication device 3 to the PCells pico 9 by comparing the RSRP measurement with a pre-trip limit determined 663. The triggering threshold is defined such that an RSRP above the triggering threshold indicates that the mobile communication device 3 is in a geographical location that is close enough to a PCell pico 9 for there to be a risk of radio interference. associated control between the PDCCH on the primary carrier (C2) of the PCell pico 9 and the PDCCH BFed on the extension holder C2 of the SCell macro 8. Therefore, if the RSRP measurement exceeds the limit value, then the mobile communication device 3 is considered to be close enough to (or within) the peak cell to have a risk of interference between any PDCCH BFed transmitted on the SCell macro 8 extension carrier C2 with the PDCCH transmitted on the carrier extension C2 from PCell pico 9. When trip limit 663 is exceeded, cell proximity detection module 668 triggers a message to macro base station 5-1 indicating that the mobile communication device is within range of a peak base station 5-2, 5-3. When the RSRP measurement falls below trigger limit 663, cell proximity detection module 668 triggers a message to macro base station 5-1 indicating that the mobile communication device is no longer within range of a base station peak 5-2, 5-3.
The resource determination module 669 determines the resources programmed for use by mobile communication devices 3 for communication purposes by decoding the PDCCH and / or PDCCH BFed appropriately.
In the description above, mobile communication device 3 is described for ease of understanding as having a number of discrete modules. Although these modules can be provided in this way for certain applications, for example where an existing system has been modified to implement the invention, in other applications, for example in systems designed with inventive features in mind from the beginning, these modules can be built in. system or global operational code and therefore these modules may not be discernible as discrete entities. Operation Figure 7 is a flow diagram illustrating the typical operation of the communication system 1 to program resources for use by a mobile communication device (MCD) 3 during communications. In figure 7, the exemplary operating scenario begins (in S1) when a mobile communication device 3 starts operating on SCell 8 of the macro base station 5-1, in a geographic location that is sufficiently far from the PCells pico 9 for risk to exist of associated control channel interference with control channel. Base station 5-1 determines the direction of the mobile communication device 3 with respect to the base station at S2 and identifies an appropriate precoding matrix (also referred to as a precoding vector) for use in beaming the PDCCH BFed for that mobile communication device 3 in the given direction. The macro base station 5-l programs OS features for the SC2 macro 8 extension holder C2 using in-carrier programming via the PDCCH BFed (in S3).
In this example, each peak base station transmits information to identify itself as a peak base station 5-2, 5-3 in S4 and the mobile communication device 3 determines, from this transmitted identity information, that the base station 5- 2, 5-3 is a peak base station (in S5). The mobile communication device 3 identifies the reference signals it receives from the peak base stations 5-2, 5-3 and then monitors the received reference signal power (RSRP) of these signals in relation to the predetermined trigger limit ( in S6).
In this example, although the RSRP remains below the trigger limit, the process in steps S2 through S6 is repeated via loop Ll1. When the RSRP increases above the trigger limit it sends a 'trigger' message to macro base station 5-1 to indicate that there is sufficient range from a peak base station 5-2, 5-3, for control channel interference be a significant risk in S7. Upon receipt of the trigger message, macro base station 5-1 determines that it should no longer use a PDCCH BFed for that mobile communication device 3 and programs the features for the SCell macro 8 extension bearer C2 using bearer programming. cross-checked via the PDCCH of the primary component carrier of Pcell marco Cl in S8. The mobile communication device 3 continues to monitor the received reference signal power (RSRP) of the reference signals from the base stations peak 5-2, 5-3 against the predetermined trigger limit in S6 (via loop S2). Although the RSRP remains above the trigger limit, the process in step S8 is repeated via the L4 loop. When the RSRP falls below the trigger threshold it sends another 'trigger' message to macro base station 5-1 to indicate that it is no longer in sufficient range from a peak base station 5-2, 5-3 for interference control channel is a significant risk (in S9 via L4 loop). Upon receipt of the additional trigger message, macro base station 5-1 determines that it can start using the PDCCH BFed for that mobile communication device 3 again and programs the features for the SCell macro 8 C2 extension bearer using programming inside the carrier via the PDCCH BFed of the SCell Cc2 extension component carrier (in S3) following the appropriate direction finding and forming a beam (in S2). Application in a communication system in which macro PCell and PCell pico use the same carrier Figure 8 schematically illustrates an additional mobile (cellular) telecommunication system 81. Telecommunication system 81 is similar to that in figure 1 and the corresponding parts are given the same reference numerals.
In the telecommunication system 81, a plurality of mobile communication devices 3-1 to 3-7 can communicate with other users via one or more of a plurality of base stations 5-1, 5-2 and 5-3. In the system illustrated in figure 1, each base station 5 shown is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) base station capable of operating in a multi-port environment.
In figure 8, the base station labeled 5-1 comprises a macro base station operating a plurality of relatively geographically large macro cells 7, 8 using respective component carriers (CCs) C1, C2 from a set of component carriers.
In this configuration, the macro base station 5-1 operates the C1 component carrier with a primary component carrier in which a primary cell (PCell) 7 is provided, and the C2 component carrier as a secondary component carrier in which a cell secondary (SCell) 8 is provided.
PCell 7 has a greater geographic coverage than SCell 8. Each of the other base stations 5-2, 5-3 shown in figure 8 comprises a peak base station operating a plurality of 'peak' cells 9-2, 9-3 , 10-2, 10-3, using a set of component carriers having component carriers (CCs) Cl, C2 corresponding in frequency to those used by the macro base station 5-1. , each peak base station 5-2, 5-3 operates a respective primary peak cell (PCell) 9-2, 9-3 in the component carrier Cl and a respective secondary secondary cell (SCell) 10-2, 10-3 in the carrier of component C2, therefore, unlike the system in figure 1, PCells pico 9 share substantially the same frequency band as PCell macro 7, and SCells pico 10 share substantially the same frequency band as SCell macro 8. The geographical coverage of each of the peak 9, 10 cells falls completely within the geographic coverage of PCell macro 7. However, the overlap between pico 9 and 10 cells and SCell macro 8 is relatively small.
Referring to figure 9, in which the subframe configuration for the component carriers for each of the cells is illustrated, it will be apparent that there is a potential for relatively large communication interference between the PDCCH of the PCell macro 7 and the PDCCH of each one of the PCells pico 9. In this exemplary configuration, however, this interference is avoided by using a time domain solution in which the macro base station 5-1 transmits a PDCCH only in certain subframes and the base stations pico 5-2, 5- 3 transmit a PDCCH in other subframes that do not overlap in time with the subframes used by the base station 5-1.
More specifically, the macro base station 5-1 uses a first predetermined set of subframes of a radio frame (in this example even numbered subframes) to transmit a PDCCH and each base station peak 5-2, 5-3 uses a second predetermined set of subframes in a radio frame (in this example odd numbered subframes) to transmit a respective PDCCH. Consequently, because the PDCCHs provided by the macro base station 5-1 and base stations 5-2, 5-3 do not overlap, the risk of control channel interference with control channel is avoided. Subframes in which a particular base station 5 does not transmit a PDCCH are also not used for data transmission (eg, PDSCH) by that base station and, consequently, are referred to as almost empty subframes (ABS). These ABS, however, can be used to transmit common / cell-specific reference signals (CRS).
The potential for any interference between the SCell macro 8 and each of the SCells pico 10 is relatively small.
Each base station 5 operates carrier C1 for its PCell 7, 9 as an independent carrier having a Physical Downlink Control Channel (PDCCH), which can be used to program the features of its own component carrier Cl (as shown by the arrows X and XxX "). The PDCCH of each component carrier C1 can also be used to program the features of the component carrier C2 (cross carrier programming") to be used for communication purposes by a mobile communication device 3 when operating on the corresponding SCell 8, 10 (eg, as shown by the arrow Y). The respective component carrier C2 used for each of the SCells 8, 10 is operated by the associated base station 5, as an extension carrier (as described above) in which a PDCCH BFed 4-1, 4-2, 4-3, 4-5, 4-8 can be provided. The PDCCH BFed 4-1, 4-2, 4-3, 4-5, 4- 8 is directional and can be used selectively to program C2 extension component carrier features for each SCell 8, 10 (eg. , as shown by the arrows Z and Z '") for specific mobile communication devices 3. The PDCCH BFed of each C2 extension component carrier can also be used to program the features of the related primary component carrier C1 (cross carrier programming) !) to be used for communication purposes by a mobile communication device 3 when operating on the corresponding PCell 7, 9 (eg, as shown by the arrow W '). The PDCCH BFed 4-1, 4-2, 4 -3, 4-5, 4-8 of the C2 extension component carrier for each SCell 8, 10 can be selectively used to program resources for a respective mobile communication device 3-1, 3-2, 3- 3, 3 -5, 3-8 operating within the corresponding SCell 8,
10. Consequently, the risk of interference in the region in which the SCell macro 8 and SCell pico 10 overlap is significantly reduced because of the geographically located nature of the PDCCH BFed. The DMRS standard for the PDCCH BFed is different from that used for a
Legacy PDCCH.
Figure 10 shows another possible subframe configuration for the component carriers for the system of figure 8. In the configuration shown in figure 10, the control region of the subframe provided using the component carrier C2 used for each SCell 8, 10 is divided into a PDCCH BFed region in which PDCCH BFed is provided, and a region without PDCCH in which no PDCCH or PDCCH BFed is provided.
The regions are generally sized equal to the PDCCH BFed region for SCell pico 10, thereby reducing the small risk of control channel interference with control channel even further.
Application in a communication system in which only pico base stations use a PDCCH BFed Figure 11 schematically illustrates an additional mobile (cellular) telecommunication system 111 and figure 12 shows a possible subframe configuration for the component carriers for the system of figure 11. The telecommunication system 111 is similar to that of figure 8 and corresponding parts receive the same reference numerals.
The communication system is essentially the same as the one shown in figure 8 except that only peak 5-2, 5-3 base stations provide a PDCCH BFed and, unlike the system in figure 8, the macro 5- base station 1 provides all resource programming for SCell macro 8 via a PDCCH provided on the primary component carrier Cl for PCell macro 7 (eg, as shown by the arrow Y in figure 12). More specifically, each base station 5 operates the C1 carrier for its PCell 7, 9 as an independent carrier having a PDCCH that can be used to program the features of its own C1 component carrier (as shown by the arrows X and X '") The PDCCH of each component carrier C1 can also be used to program the features of the component C2 carrier
(* cross-carrier programming!) to be used for communication purposes by a mobile communication device 3 when operating on the corresponding SCell 8, 10 (as shown by the arrow Y).
The respective component carrier C2 used for each of the SCells 8, 10 is operated, by the associated base station 5, as an extension carrier as described previously. However, the C2 component carrier used for SCell macro 8 is not provided with a PDCCH or PDCCH BFed and therefore can only be programmed using the PDCCH provided on the primary component carrier Cl. The C2 component carrier used for each SCell pico 10 operated by the associated peak base station 5-2, 5-3 can be provided with a PDCCH BFed 4-3, 4-8.
The PDCCH BFed 4-3, 4-8 is directional and can be used selectively to program features of the C2 extension component carrier for each SCell 10 (eg, as shown by the arrow Z ') for specific mobile communication devices 3. The PDCCH BFed of the C2 extension component bearer for each SCell pico 10 can also be used to program the related primary component bearer resources Cl ('cross bearer programming') to be used for communication purposes by a device of mobile communication 3 (eg, as shown by the arrow W ').
The PDCCH BFed 4-3, 4-8 of the C2 extension component carrier for each SCell pico 10 can therefore be used selectively to program resources for the respective mobile communication device 3-3, 3-8 operating within the corresponding scell 10 Consequently, the risk of control channel interference with control channel in the region in which SCell macro 8 and Sscell pico 10 overlap is significantly reduced.
Application in a single-carrier communication system Figure 13 schematically illustrates an additional mobile (cellular) telecommunication system 131, figure
14 shows the configuration of a radio frame for system 131 in figure 13, and figure 15 shows a number of possible subframe configurations for the system in figure 13. Telecommunication system 131 has similarities with those described above and with the parts corresponding numbers are given the same reference numerals.
In the system illustrated in figure 13, each base station 5 shown is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) base station capable of operating in a single carrier environment.
A major difference between the system 131 shown in figure 13 and those described earlier is that the telecommunication system 131 is a single component carrier system that has been adapted in a way that allows legacy mobile communication devices to use the system as normal (p eg those defined by the 3rd Generation Partnership Project (3GPP) version 8, 9 and 10 standards as a more advanced mobile communication device can advantageously be programmed using a PDCCH BFed.
In figure 13, the base station labeled 5-1 comprises a base station operating a relatively geographically large macro cell 7 using a single component carrier (e.g., a backward compatible or inherited component carrier). Each of the other base stations 5-2, 5-3 shown in figure 13 comprises a peak base station operating a 9-2, 9-3 peak cell, using a component carrier C1 of the same frequency as the component carrier used by macro base station 5-1. The power used to provide pico 9 cells is low in relation to the power used for macro cell 7 and pico 9 cells and therefore small in relation to macro cell 7. As shown in figure 13, in this example the geographical coverage of each of the cells peak 9 falls completely within the geographic coverage of macro cell 7.
Referring to figure 14, the configuration of a radio frame 140 for communication system 113 is shown. As seen in figure 14, and as those skilled in the art will readily understand, each radio frame comprises an E-UTRA radio frame comprising ten subframes 142, 144, a number of which are reserved for Multimedia Transmission through a Single Frequency Network (MBSFN). In figure 14, the subframes reserved for MBSFN are referred to as MBSEFN 144 subframes. To allow legacy mobile communication devices to communicate successfully in system 131, non-MBSFN 142 subframes comprise inherited E-UTRA subframes having an inherited PDCCH (eg ., as defined in the relevant 3GPP version 8, 9 or 10 standards). Therefore, older mobile communication devices (eg, versions 8, 9 and 10) are advantageously able to monitor the legacy PDDCH in non-MBSFN 142 subframes. MBSFN 144 subframes are configured with a PDCCH BFed with a corresponding new standard DMRS, as previously described. Newer mobile communication devices 3 (eg, version 11 and beyond), such as those shown in figure 13, are advantageously capable of monitoring both the inherited PDDCH in the non-MBSFN 142 subframes and the PDCCH BFed in the MBSFN 144 subframes Referring to figure 15, there are a number of different options (labeled (a) to (c) in figure 15) for configuring MBSFN subframe for the system in figure
113. In the first option (a), MBSFN 144 subframes of both macro base station 5-1 and peak base stations 5-2, 5-3 are provided with PDCCH BFed. This option has the advantage of simplicity and the fact that the control channels formed in bundles 4-1, 4-2, 4-3, 4-5, 4-8 can be used in both pico and macro cells 7, 9 In the second option (b), the MBSFEN 144 subframes of both the macro base station 5-1 and the base stations peak 5-2,
5-3 are provided with a split PDCCH BFed region and a region without PDCCH (similar to that described with reference to figure 10). The regions are generally dimensioned equal and are divided such that the PDCCH BFed region for macro cell 7 does not overlap with the PDCCH BFed region for peak cell 8. This option reduces the risk of interference and allows the formed control channels in bundles 4-1, 4-2, 4-3, 4-5, 4-8 to be used in both pico and macro cells 7, 9.
In the third option (c), the MBSEN 144 subframes of the base stations 5-2, 5-3 are provided with a PDCCH BFed region, while the MBSEN 144 subframes of the macro base station 5-1 are not. This option reduces the risk of interference and allows the control channels formed in bundles 4-3, 4-8 to be advantageously used in pico 9 cells (for this option, the macro base station 5-1 does not use the control channels formed in bundles labeled 4-1, 4- 2, 4-5 shown in figure 13).
Application in a distributed antenna system Figure 16 schematically illustrates a mobile (cellular) telecommunication system 161 in which a user of any of a plurality of mobile communication devices 3-1 to 3-7 can communicate with other users via a macro base station and a local antenna 15-0 at the base station and a plurality of antennas geographically distributed 15-1, 15-2 3 15-3. Each antenna distributed 15-1 to 15-3 is connected to the base station (for example by a fiber optic link) and base station 5 controls reception and transmission via antenna 15. Base station 5 uses a common cell identity for communications via each antenna 15 and therefore a mobile communication device 3 being served by any of the antennas 15 behaves as if it were operating in a single cell.
In figure 16, the base station effectively operates, in a first component carrier C1, a primary * common 'cell (PCell) 7 comprising a plurality of primary subcells 7-0 to 7-3 each provided using a different respective antenna. 15-0 to 15-3. The base station operates, in a second C2 component carrier, an effective secondary cell (SCell) 8 comprising a plurality of secondary subcells 8-0 to 8-3 each provided using a different respective antenna 15-0 to 15-
3. In the example shown, the primary subcell “local” Or "master! 7-0 operated via the local antenna 15-0 has a larger geographic coverage than the secondary subcell" * local 'or' master '8-0 operated via the local antenna 15-0. The geographical coverage of each of the "distributed" subcells! 7-1 to 7-3 and 8-1 to 8-3 operated via the distributed antennas 15-1 to 15-3 falls completely within the geographical coverage of the local primary subcell 7- 0 and partially overlaps with the geographic coverage of the local secondary subcell 8-0.The power of the Cl, C2 carriers used to provide the subcells distributed 7-1 to 7-3 and 8-1 to 8-3 is defined such that the geographical coverage of the primary subcells distributed 7-1 to 7-3 (in this example) is substantially coincident with the geographical coverage of the secondary subcells distributed 8-1 to 8-3, in the example shown the distributed subcell 7-2, 8-2 provided using the distributed antenna 15-2 partially overlaps with the distributed subcells 7-1, 7-3, 8-1, 8-3 respectively provided using the other distributed antennas 15-1, 15-3. there is a relatively high potential for control channel to control channel interference between subcells 7, 8 where they overlap with each other. In this exemplary configuration, interference from PDCCH to PDCCH in the primary component carrier C2 can be avoided by appropriately time domain separation of the subframes used to communicate the PDCCH (eg, with ABS for the other subframes as described above). Referring to figure 17, in which the subframe configuration for the component carriers for the distributed cells is illustrated, interference from control channel to control channel on secondary carrier C2 is avoided by providing a different control channel (PDCCH based in DMRS), each having a respective different DMRS sequence, in the control regions of the respective subframes for secondary subcells “distributed overlapping 8-1 to 8-3. The DMRS sequence selected for the different DMRS-based PDCCHs is selected to be substantially orthogonal.
As shown in figure 17, a DMRS-based PDCCH having a first DMRS sequence (DMRS-based PDCCH 1) is provided in the control region of subframes communicated in the non-overlapping secondary subcells 8-1 and 8-3 provided via antennas 15-1 and 15-3. A DMRS-based PDCCH having a second DMRS sequence (PDCCH based on DMRS 2) is provided in the subframe control region “communicated in the secondary subcell 8-2, provided via antenna 15-2, which overlaps with the other secondary subcells 8 -1 and 8-2, thus helping to avoid interference from control channel to control channel in regions where secondary subcells 8 overlap.
The structure of each DMRS-based PDCCH is therefore similar to that of the PDCCH BFed of previous examples. However, in this configuration, the new PDCCH is transmitted from a single antenna and is omnidirectional rather than beamed. The structure of the DMRS-based PDCCH is therefore similar to the PDCCH BFed as transmitted from a single antenna port.
Other modifications and alternatives Detailed configurations have been described above. As those skilled in the art will appreciate, a number of modifications and alternatives can be made to the configurations and variations above while still benefiting from the inventions configured here.
It will be appreciated that although the macro and peak 5 base stations have been described with particular reference to a different set of modules (as shown in figures 4 and 5) to highlight the particularly relevant characteristics of the different base stations 5, the macro and peak 5 base stations are similar and can include any of the modules described for the other.
For example, each peak 5-2, 5-3 base station may include a measurement management module 445, a direction determination module 447 and / or a beamform module 449 as described with reference to figure 4. Similarly , the macro base station 5-1 may include a cell type identifier module 547 as described with reference to figure 5. It will be appreciated that although communication system 1 is described in terms of base stations 5 operating as macro or peak base stations , the same principles can be applied to base stations operating as femto base stations, relay nodes providing elements of base station functionality, domestic base stations (HeNB), or other such communication nodes.
In the above configurations, the cell type identifier module has been described as providing information to identify cells controlled by the base station 5-2, 5-3 as peak 9, 10 cells and that this information is transmitted to mobile communication devices 3 that enter within or near the coverage area of Pcell pico 9. It will be appreciated that the information “to identify the cells provided by base stations 5-2, 5-3 can comprise any suitable information such as an information type identifying element. specific cell, or a cell identity (Cell ID) from which the cell type can be derived.
For example, if a HeNB, instead of a peak base station, operates on low power cells 9, 10, the cell type can be identified by comparing the cell identity provided by HeNB to a range of known Cell IDs to be allocated to HeNBs.
Additionally, although in the description above it is theThe mobile communication device that determines whether a particular cell is a peak cell for which control channel interference is a risk, the macro base station could also do this.
For example, the macro base station can send any mobile communication device configured with a PDCCH BFed, perform RSRP measurements and compare the results with a predefined limit value (eg, similar to the "trigger" limit as described) . If the results are found to be above that threshold value, the mobile communication device simply reports the measurement to the base station with cell identity information (eg, Cell ID) for the cell to which the measurement relates. .
Upon receipt of the report, the macro base station (which has access to information identifying Cell IDs for the peak cells in its coverage area) can avoid using a PDCCH BFed for a mobile communication device that is close to a peak cell in your coverage area.
In the case of HeNBs, the macro base station is able to identify them, based on their Cell IDs, such that the macro base station can avoid using the PDCCH BFed for a mobile communication device that is close to an identified HeNB cell.
Referring to the configuration described with reference to Figure 1, although a PDCCH BFed is not provided for the SCells Peak 10-2 extension component Cl, 10-3, it will be appreciated that such PDCCH BFed can potentially be provided, although at the possible cost of interference between the PDCCH of PCell macro 7 and the PDCCH BFed of SCell pico 9. It will also be appreciated that although it has not been described in significant detail above, a PDCCH BFed from any of the communication systems can potentially be used for programming cross-carrier for any component carrier of that system regardless of whether or not a control channel is provided for that component carrier. Although a particular DMRS standard has been described for the PDCCH BFed, any DMRS standard can be used that is different from that used for an inherited PDCCH.
It will be appreciated that the predetermined trigger limit can be reconfigurable. In addition, the trigger limit can be adaptable, for example, to allow it to change automatically or semi-automatically, based on prevailing radio conditions. The threshold value, and trigger message timing, may vary depending on the implementation. The optimal limit value for different situations can be reached based on simulation.
Where a flow diagram shows discrete sequential blocks, this is for the purpose of clarity only, and it will be appreciated that many of the steps can occur in any logical order, can be repeated, omitted, and / or can occur in parallel with other steps. For example, referring to step S4 of the flow diagram of figure 7, the peak base stations can transmit identification periodically, in parallel with the other steps shown. Similarly, steps S4 and S5 do not need to be repeated with each interaction of loops Ll1 and L4. In addition, the mobile communication device 3 can monitor the RSRP of reference signals received continuously in parallel with the other steps.
Although the provision of bundled PDCCH has been described in detail, it will be appreciated that other information, deliberately omitted from transmission on an extension bearer, can also be provided in a beam formed manner on extension bearers. For example, a new Physical Hybrid ARQ Indicator Channel (PDCCH BFed) can also be provided on the extension carrier.
Although the terminology used refers to a beam-formed PDCCH (PDCCH BFed), any similar terminology can be used appropriately to refer to a new beam-formed PDCCH and / or a PDCCH having a modified DMRS (for example, '* PDCCH pre-coded ',' * PDCCH based on DMRS ', * PDCCH formed in bundle based on codebook "). The beam formation can be based on codebook in which a' pre-coding 'vector (to ponder transmissions from respective antennas) is selected from a set of predefined pre-coding vectors (the '* codebook'). In this case, the mobile communication device knows, or is informed of, the pre-coding vector used.
The beam formation may be not based on a codebook in which the network applies arbitrary beam formation to the transmitter and the mobile communication device has no immediate means of determining the nature of the beam formation that has been applied.
In this case, a reference signal specific to the mobile communication device to which the same beam formation was applied is transmitted to allow the estimation of the channel experienced by the beam-formed transmission.
The peak and macro base stations can respectively use different beamforming techniques (eg, the peak base station can use codebook-based beamforming or the macro base station can use non-beamform-based beamforming. codes or vice versa). In the example described with reference to figure 13, the PDCCH BFed was described as being provided in the MBSEN subframes of a radio frame while the inherited PDCCH was placed in other subframes.
It will be appreciated that while using the MBSEN subframes is advantageous in terms of simplicity of implementation, any appropriate predetermined subframes can be used (for example ABS subframes). In a particularly advantageous scenario, for example, the subframes used for transmission of PDCCH BFed use MBSFN subframes that are also configured to be ABS subframes.
The benefits of this arise because MBSEN subframes are standardized for 3GPP Version 8 mobile communication devices, and ABS subframes are standardized for 3GPP Version 10 mobile communication devices.
Therefore, for backwards compatibility, Version 8 mobile communication devices are capable of interpreting MBSFN subframes, and Version 10 mobile communication devices are capable of interpreting both MBSEN and ABS subframes.
Consequently, having MBSEN subframes loading the new BFed control channel as a subset of subframes “configured for Almost Empty Subframes (ABS) means that legacy Version 10 mobile communication devices will be able to effectively ignore them as ABS subframes not loading data, Version 8 mobile communication devices will be able to treat them as MBSEN subframes and newer mobile communication devices, as described for the above configurations, will be able to treat them as subframes carrying PDCCH BFed.
Additionally, in the example described with reference to figure 13, using coordinated programming in which the macro base station 5-1 and peak base stations 5-2, 5-3 exchange information about when the PDCCH BFed should be programmed, the collision between the BFed PDCCHs transmitted by those base stations 5 can be avoided.
In yet another advanced variation of the example described with reference to figure 13, the macro base station 5-1 and peak base stations 5-2, 5-3 can use the same feature for BFed PDCCHs where orthogonal communication currents are applied based on CSI information exchanged between macro base station 5-1 and peak base stations 5-2, 5-3. In the exemplary configurations described above, each new control channel having a new DMRS standard has been described as being provided in a subframe control region.
It will be appreciated that although this is particularly beneficial, the control channel can be provided in a data region of a subframe or partially in a control region and partially in a data region while still benefiting from many of the advantages provided by the invention.
However, despite the fact that there may be a reluctance to use a region normally reserved for existing PDCCH due to perceived technical difficulties in doing this, providing the new control channel (s) having the new DMRS in the region control, as opposed to the data region, provides some notable advantages.
First, for example, decoding a control channel in the region of a reserved subframe as a control region is significantly faster than decoding a control channel in the region of a reserved subframe as a data region because mobile communication devices look for the control region before the data region.
Second, for similar reasons, decoding a control channel in the region of a reserved subframe as a control region uses less battery power than decoding a control channel in the region of a reserved subframe as a data region.
Additionally, when no data resource is allocated by the control channel, having the control channel in the control region allows the mobile communication device to bypass the data region completely, with the power and speed advantages that follow from such an arrangement. .
In the exemplary configurations above, a telecommunications system based on mobile telephony has been described.
As those skilled in the art will appreciate, the signaling techniques described in the present patent application can be employed in another communications system.
Other nodes or communications devices may include user devices such as, for example, personal digital assistants, laptop computers, web browsers, etc.
As those skilled in the art will appreciate, it is not essential that the relay system described above is used for mobile communications devices. The system can be used to extend the coverage of base stations on a network having one or more fixed computing devices as well as or instead of mobile communication devices.
In the exemplary configurations described above, each of the base stations 5 and mobile communication devices 3 includes transceiver circuitry. Typically, this circuitry will be formed by dedicated hardware circuits. However, in some exemplary configurations, part of the transceiver circuitry can be implemented as software executed by the corresponding controller.
In the exemplary configurations above, a number of software modules have been described. As those skilled in the art will appreciate, the software modules can be provided in compiled or non-compiled form and can be supplied to the base station or relay station as a signal via a computer network, or on a recording medium. In addition, the functionality performed by part or all of this software can be performed using one or more dedicated hardware circuits.
Several other modifications will be apparent to those skilled in the art and will not be described in further detail here.
This patent application is based on and claims the The Priority Benefit of UK Patent Application No. 1112752.9, filed on July 25, 2011, the disclosure of which is incorporated herein in its entirety by reference.

权利要求:
Claims (56)
[1]
1. Communication device, for communicating with a plurality of mobile communication devices in a cellular communication system, characterized by the fact that it comprises: o - means to operate at least one communication cell; - means for communicating, via a plurality of antenna ports, a plurality of subframes with each of a WF plurality of communication devices within: mentioned at least one cell, being that: - each subframe comprises a plurality of communication resources defining a control region for communication with a respective control channel and a plurality of communication resources defining a data region for communication with a respective data channel; and - said communication medium is operable to communicate: first control information using a first reference signal pattern and using a first antenna port; and - second control information using a second reference signal pattern and using a second antenna port.
[2]
2. Communication device, for communication — with— a ——— communication device of a cellular communication system, characterized by the fact that it comprises: - means for recording the said communication device in at least one communication cell ' operated by said communication device; - 30 - means for receiving a plurality of subframes transmitted from said communication device via a plurality of antenna ports, being that: - each subframe comprises a plurality of communication resources defining a control region for communication with a respective channel control and a plurality of communication resources defining a data region for communication with a respective kg data channel; and - said receiving means is operable to communicate: first control information communicated using a first reference signal pattern and using a first antenna port by said communication device; and - second control information communicated using a second reference signal pattern and using a second antenna port by said communication device, and - means to interpret said communicated control information using said first reference signal pattern, and to interpret communicated control information using the aforementioned second reference signal standard.
[3]
3. Communication device, for communicating with a plurality of mobile communication devices in a cellular communication system, characterized by the fact that it comprises: - means to operate at least one communication cell; - means for communicating a plurality of subframes with each of a plurality of communication devices within said at least one cell, with que— nm to —— each subframe Comprising a plurality of communication resources - 25 defining a control region for communication with a respective control channel and a plurality of communication resources defining a data region for communication with a respective data channel; and + 30 - the said means of communication is operable to communicate: - a first control channel having a first reference signal pattern in a control region of a first of the aforementioned subframes; and - a second control channel having a second reference signal pattern in a one second control region of the aforementioned subframes, the said second reference signal pattern being different from the
DO BC
: first reference signal pattern cited.
[4]
4. Communication apparatus according to claim 3, characterized in that said means for operating - at least one communication cell is operable to operate a first cell using a first "component carrier and a second cell using a second component carrier, and said first subframe being provided using said first BD: component carrier and said second subframe is provided using said second component carrier.
[5]
5. Communication device, according to claim 4, characterized by the fact that the aforementioned second component carrier is operated as an extension carrier.
[6]
6. Communication device according to any one of claims 4 or 5, characterized in that said first component carrier is operated as an independent carrier.
[7]
7. Communication device according to any one of claims 3 to 6, characterized by the fact that said means of communication is operable to focus said second control channel spatially in a direction of a specific communication device.
[8]
8. Communication device, according to any ee .... of claims 3 to 7, - characterized by the said means of communication being operable to transmit said first control channel omni-directionally through the whole of said at least one cell. "
[9]
9. Communication device according to any one of claims 3 to 8, characterized in that it comprises means for determining whether a specific communication device should receive a first control channel having the first reference signal pattern mentioned. , or a second control channel having said second reference signal pattern.
[10]
10. Communication device according to claim 9, characterized by the fact that said means of determination is operable to determine whether the said means
. specific communication device must receive said first control channel having said first reference signal pattern, or said second "control channel having said second reference signal pattern, based on said location - communication device .
[11]
11. Communication device, according to claim 10, characterized by the fact that said means of determination is operable to determine if the "10 mentioned specific communication device should receive said first control channel having said first pattern of reference signal, or said second control channel having the second reference signal pattern, based on the location of said communication device in relation to an additional communication device.
[12]
12. Communication device according to claim 11, characterized in that said means of determination is operable to determine the location of said communication device in relation to said additional communication device based on a measurement result of a parameter representing a distance from the aforementioned e ... Communication from the aforementioned additional communication device -— & ——.
[13]
13. Communication device according to claim 12, characterized in that said parameter representing a distance from said communication device from said additional communication device comprises a received reference signal power (RSRP) signal transmitted by said additional communication device.
[14]
14. Communication apparatus according to any one of claims 9 to 13, characterized by the fact that | 35 said means of determination being operable to determine that said communication device at specific must receive said first channel of bp control having said first reference signal pattern if a predefined message has been received from the specific communication device . -
[15]
15. Communication apparatus according to any one of claims 9 to 14, characterized by the fact that. said means of determination being operable to determine that said specific communication device must receive said second channel of "control having said second signal pattern. of - '10 reference if an additional predefined message has been received from specific communication device.
[16]
16. Communication apparatus according to any one of claims 9 to 15, characterized in that the said means of determination is operable to determine whether the said specific communication device should receive said first control channel having said first reference signal pattern, or the said second control channel having the second reference signal pattern, depending on a measurement report received from the specific communication device.
[17]
17. Communication device, according to any and .... . . of claims 3 or 4, characterized by the fact that the communication device comprises a plurality of distributed antennas.
[18]
18. Communication device, according to claim 17, characterized in that the said means of communication is operable to communicate the said - 30 first control channel having a first reference signal pattern using any one of the said plurality of antennas .
[19]
19. Communication apparatus according to either of claims 17 or 18, characterized in that said communication means is operable to communicate said second control channel having a second reference signal pattern using a subset
. comprising at least one, but not all, of said plurality of antennas.
[20]
20. Communication device according to any one of claims 17, 18 or 19, characterized in that the said means of communication is operable for: communicating a control channel having a third reference signal pattern in a third of cited subframes using a subset comprising at least: one, but not all, of said plurality of antennas, 'said third reference signal pattern being different from the first reference signal pattern and said second reference signal pattern .
[21]
21. Communication device according to claim 3, characterized in that the aforementioned means of communication is operable for communicating radio frames comprising a plurality of subframes, each subframe having a different respective subframe location, and the aforementioned one being means of communication is operable: - to communicate the aforementioned first control channel having a first reference signal pattern in a subframe in a subframe location, within a radio frame, selected from a first and e -. 6set of location (s) —of — subframe — comprising * at least one subframe location; and - to communicate said second control channel having a second reference signal pattern in a subframe ”in a subframe location, within a radio frame, selected from a second subset of” 30 location (s) of subframe comprising at least one subframe location; the said first set of subframe location (s) not comprising the same (s) subframe location (s) as said second set of subframe location (s).
[22]
22. Communication apparatus according to either of claims 3 or 21, characterized by the fact that the
. said first control channel having a first reference signal pattern will not be communicated in a subframe at a subframe location of one. multimedia transmission through a single frequency network subframe (MBSEN) and / or not be communicated on one. subframe in a subframe location of an almost blank subframe (ABS).
[23]
23. Communication device according to any one of claims 3, 21 or 22 ,. characterized by the fact. Í - i 10 of the aforementioned second control channel having a second reference signal pattern to be communicated in a subframe at a subframe location of a multimedia transmission over a single frequency network (MBSEFN).
[24]
24. Communication device according to any one of claims 3 or 21 to 23, characterized in that the second control channel having a second reference signal pattern is communicated in a subframe of an almost blank subframe (ABS ).
[25]
25. Communication device according to any one of claims 3 to 24, characterized by the fact that control information communicated using the first and / or the second one represents an allocation with .... resource for a communication device; - —- Tr + - H = “To 25
[26]
26. Communication apparatus according to any one of claims 3 to 25, characterized in that each said reference signal pattern comprises a demodulation reference signal pattern 'DMRS'.
[27]
27. Communication device, for communication with * 30 communication device of a cellular communication system, characterized by the fact that it comprises: - means for registering said communication device in at least one communication cell operated by said communication device; - means for receiving a plurality of subframes from the said communication device, being that: - each subframe comprises a plurality of resources to DO | AAAAAA EA Ao A ILE LFL E FE FL E E E E E RA E E AC AC tt o ot tk> »; Cõ-» F »LIS hM» JCSó »S»,; ICSO, à »,», PE ii o ii ii to 8. of communication defining a control region for communication with a respective control channel and a plurality of communication resources defining one. data region for communication with a respective data channel; and: - said receiving means is operable: - to communicate a first control channel having a first reference signal pattern in a control region of a first of the aforementioned subframes; and - - . "air 10 - to receive a second control channel having a second reference signal pattern in a second control region of the aforementioned subframes, the said second reference signal pattern being different from the first signal signal pattern and - means for interpreting control information communicated on said first control channel having a first reference signal pattern, and for interpreting control information communicated on said second control channel having a second reference signal pattern.
[28]
28. Communication device according to claim 27, characterized in that said receiving means is operable to receive said first subframe in a first carrier — de-component TFT TT 25 of a first frequency band and said one second subframe in said second component of a second frequency band. -
[29]
29. Communication device, according to claim 28, characterized by the fact of the aforementioned. 30 second component carrier to be operated as an extension carrier.
[30]
30. Communication device according to either claim 28 or claim 29, characterized in that said first component carrier is an independent carrier.
[31]
31. Communication device according to any one of claims 27 to 30, characterized by the
. the fact that said receiving means is operable to receive said second control channel in a radio beam focused spatially in one direction of the said. communication device.
[32]
32. Communication device, according to any. one of claims 27 to 31, characterized by the fact that said receiving means is operable to receive said first radio channel in one: radio communication transmitted omnidirectionally. "10 across the aforementioned at least one cell.
[33]
33. Communication device according to any one of claims 27 to 32, characterized in that it additionally comprises means for measuring a parameter representing a distance from said communication device from the additional communication device.
[34]
34. Communication device according to claim 33, characterized in that said parameter representing a distance from said communication device from said additional communication device comprises a received signal reference power (RSRP) of a signal transmitted by said additional communication device. = o. .
[35]
35. Communication device according to —qgualqguer— —— one of claims 33 or 34, characterized by the fact that it additionally comprises means for transmitting a predefined message to said device. communication operating said cell depending on a result of said measurement of said parameter ”30 representing a distance from said communication device from said additional communication device.
[36]
36. Communication device according to claim 35, characterized by the fact that said predefined message comprises a measurement report including said result of said measurement.
[37]
37. Communication device, according to any
. one of claims 35 or 36, characterized in that said predefined message comprises information representing an identity of said device. additional communication and / or a cell operated by said additional communication device.
.
[38]
38. Communication device according to any one of claims 35, 36 or 37, characterized in that it additionally comprises means for comparing said parameter against a predetermined limit value. :
[39]
39. Communication device according to claim 38, characterized by the fact that said means of transmission is operable to transmit said predefined message if said comparison indicates that said parameter has risen above said limit value.
[40]
40. Communication device according to either of claims 38 or 39, characterized in that said means of transmission is operable to transmit an additional predefined message if said comparison indicates that said parameter has fallen below said value limit.
[41]
41. Communication device, according to claim 23, characterized by the fact that said reception means is operable to receive frames from it. radio comprising a plurality of subframes, — each — Õ ——— - subframe having a different subframe location within the radio frame, and the said receiving medium is operable:. - to receive a first control channel having a first reference signal pattern in a subframe in. 30 a subframe location, within a radio frame, selected from a first set of subframe location (s) comprising at least one subframe location; and - to receive a second control channel having a second reference signal pattern in a subframe at a subframe location, within a radio frame, selected from a second set of
. subframe location (s) comprising at least one subframe location; - the aforementioned first set of. subframe location (s) does not include the same subframe location (s) as the second. set of subframe location (s).
[42]
42. Communication device according to either of claims 23 or 41, characterized in that the aforementioned first control channel having a first - reference signal pattern is not received in a subframe at a subframe location of a multimedia transmission over a single frequency network (MBSFN) and / or not being received in a subframe at a subframe location of an almost blank subframe (ABS).
[43]
43. Communication device according to any one of claims 23, 41 or 42, characterized in that said second control channel having a second reference signal pattern is received in a subframe at a subframe location of a transmission multimedia through a single frequency network (MBSEN).
[44]
44, Communication device, according to any -. one of claims 23, or 41 to 43, characterized by the fact that said second control channel having a second reference signal pattern is received in a subframe of an almost blank subframe (ABS). .
[45]
45. Communication device according to any one of claims 23 to 44, characterized by. 30 the fact that the aforementioned control information communicated using the aforementioned first and / or cited second represents a resource allocation for the communication device.
[46]
46. Communication device according to any one of claims 23 to 45, characterized in that each said reference signal pattern comprises a demodulation reference signal pattern '* DMRS'.
.
[47]
47. Method for communicating with a plurality of mobile communication devices in a cellular communication system, performed by a wireless device. communication, characterized by the fact that it comprises: - operating at least one communication cell; and - communicating, via a plurality of antenna ports, a plurality of subframes with each of a plurality of communication devices within said at least one cell, each subframe comprising. a 2.
plurality of communication resources defining a control region for communication with a respective control channel and a plurality of resources defining a data region for communication with a respective data channel; - communicating first control information using a first reference signal pattern and using a first antenna port; and - communicating second control information using a second reference signal pattern and using a second antenna port.
[48]
48. Method for communicating with a communication device of a cellular communication system, executed by a communication device, characterized by the fact that eee - 9 ÇOMpreend: LD no oo = ooae - register the mentioned communication device in at least one cell communication operated by said communication device; . - receiving a plurality of subframes transmitted from said communication device via one. 30 plurality of antenna ports, each subframe comprising a plurality of communication resources defining a control region for communication with a respective control channel and a plurality of communication resources defining a data region for communication with a respective communication channel Dice; - receiving first communicated control information using a first reference signal pattern and using
. a first antenna port by said communication device; - interpret the aforementioned control information. using the aforementioned first reference signal pattern; - receive second control information communicated. using a second reference signal pattern and using a second antenna port by said communication device; and À: —- interpret control information communicated using the - cited according to the reference signal standard.
[49]
49. Method for communicating with a plurality of mobile communication devices in a cellular communication system, performed by a communication device, characterized by the fact that it comprises: - operating at least one communication cell; - communicate a plurality of subframes with each of a plurality of communication devices within said at least one cell, each subframe comprising a plurality of communication resources defining a control region for communication with a respective control channel and a plurality of communication resources defining a data region for communication with a respective data channel; and ... 7 communicate control information — using — a first —————- control channel having a first reference signal pattern in a control region of a first of the aforementioned subframes; and e - communicating control information using a second control channel having a second signal pattern. 30 reference in a control region of one second of the aforementioned subframes, the said second reference signal pattern being different from the said first reference signal pattern.
[50]
50. Method for communicating with a communication device of a cellular communication system, performed by a communication device characterized by the fact that: a aa o o o Do a o a a E E a a a -
. - register said communication device in at least one communication cell operated by said communication device; . - receive a plurality of subframes from the aforementioned communication device, each subframe. comprises a plurality of communication resources defining a control region for communication with a respective control channel and a plurality of communication resources defining a data region -. . 10 for communication with a respective data channel; - receiving a first control channel having a first reference signal pattern in a control region of a first of the aforementioned subframes; —- interpret control information communicated in the mentioned first control channel having a first reference signal pattern; - receiving a second control channel having a second reference signal pattern in a second control region of said subframes, said second reference signal pattern being different from said first reference signal pattern; and - to interpret control information communicated in the mentioned second control channel having a second co ... pattern. Reference signal. - ————— ———- op
[51]
51. Computer program product, characterized by | fact of understanding operable instructions to program a programmable processor to implement equipment. communication, as identified in any of the | claims 3 to 26 or a communication device. 30 as identified in any of claims 27 to 46.
[52]
52. Communication device, for communicating with a plurality of mobile communication devices in a cellular communication system, characterized by the fact that it comprises: - means to operate at least one communication cell; - means for communicating a plurality of subframes with
. each of the plurality of communication devices within said at least one cell, being that: - each subframe comprises a plurality of resources. of communication defining a control region for communication with a respective control channel and one. plurality of communication resources defining a data region for communication with a respective data channel; and - the aforementioned means of communication is. operable to communicate:: Ú Ú | - control information using a first control channel having a first reference signal pattern in a control region of a first of the aforementioned subframes; e - control information in a control region using a second control channel having a second reference signal pattern in one of said control regions and one second data from said subframes, the said second signal pattern being reference is different from the first reference signal pattern.
[53]
53. Communication device, for communication with a communication system communication device -. cell phone, characterized by the fact that it
25.. = -— means — leave to record said communication device in at least one communication cell operated by said communication device; . - means for receiving a plurality of subframes from the said communication device, being that:. 30 - each subframe comprises a plurality of communication resources defining a control region for communication with a respective control channel and a plurality of communication resources defining a data region for communication with a respective data channel; and - the aforementioned receiving means is operable: - to receive a first control channel having a
. first reference signal pattern in a control region of a first of the aforementioned subframes; and - to receive a second control channel having a second reference signal pattern in at least one of a control region and a one second data region of said subframes, said second reference signal pattern. it is different from the first reference signal pattern; and == - means for interpreting control information = communicated on said first control channel having a first reference signal pattern, and for interpreting control information communicated on said second control channel having a second reference signal pattern.
[54]
54. Communication device, for communicating with a plurality of mobile communication devices in a cellular communication system, characterized by the fact that it comprises: - means to operate at least one communication cell; - means for communicating a plurality of subframes with each of a plurality of communication devices within said at least one cell, being that: - said communication means is operable to communicate: ee ... 7 control information using a first omnidirectional control channel through the aforementioned cell; and - control information using a second channel. control in a direction spatially focused towards a communication device for which the control information is intended.
[55]
55. Communication device, for communication with a communication device of a cellular communication system, characterized by the fact that it comprises: - means for registering said communication device in at least one communication cell operated by said communication device; - means for receiving a plurality of subframes to be
'. from the aforementioned communication device, being that: - the aforementioned means of reception is operable: - to receive a first control channel. omnidirectionally by the communication device through the aforementioned cell; and . - to receive a second control channel transmitted in a direction spatially focused in the direction of the aforementioned communication device; and - means for interpreting “control information = communicated on said first control channel, and for interpreting control information communicated on said second control channel.
[56]
56. Communication device, for communicating with a plurality of mobile communication devices in a cellular communication system, characterized by the fact that it comprises: | - a cell controller adapted to operate at least one communication cell; - a transceiver operable to communicate a plurality of subframes with each of the plurality of communication devices within said at least one cell; where: - each subframe comprises a plurality of resources 0 eee .——-—. of communication. defining a control region for "communication with a respective control channel and a plurality of communication resources defining a data region for communication with a respective data channel; and 7 - said transceiver is additionally operable to. 30 communicate: - control information using a first control channel having a first reference signal pattern in a control region of a first of the aforementioned subframes, and - control information using a second control channel having a second reference signal pattern in at least one of the aforementioned control and control regions
, data from one second of the aforementioned subframes, the said second reference signal pattern being different from the first reference signal pattern.
R 57. Communication device, for communication with the communication device of a communication system. cell phone, characterized by the fact that it comprises: - an operable cell registration module to register said communication device in at least one! communication cell operated by the mentioned E communication device; - a transceiver operable to receive a plurality of subframes from said communication device, being that: - each subframe comprises a plurality of communication resources defining a control region for communication with a respective control channel and a plurality of communication resources communication defining a data region for communication with a respective data channel; and - said transceiver is additionally operable: - to receive a first control channel having a first reference signal pattern in a control region of a first of said subframes; and ee .... 7 b to receive a second control.-channel having -a --— - - second reference signal pattern in at least one of said control region and said second data region of said subframes, the quoted. second reference signal pattern is different from the 'first reference signal pattern; and ”30 - a processor operable to interpret control information communicated on said first control channel having a first reference signal pattern, and to interpret control information communicated on said second control channel having a second reference signal pattern.
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RESSSETEETH THIS WEB OSS WEB RSI [ecsstecac sima SRS ETA
GET OUT OF THAT PLATE SSL RSROSETTTTA) RSA TITTA SST RSSSSEETTIT RESET o RSSSSSSEEEEH SETTE ESTEIO O, II II A à £ (sasopeuodans)
'433 431 435
INTERFACE CIRCUIT
NETWORK TRANSCEIVER ANTENNAS 437
CONTROLLER 439 441 OPERATING SYSTEM 242
CONTROL MODULE
COMMUNICATION 443 MANAGEMENT MODULE
MANAGEMENT OF COMPONENT HOLDER 445 MANAGEMENT MODULE
MEASUREMENT MEASURE 446 MANAGEMENT MODULE
CONTROL CHANNEL FEED 447 'RIO BE SEER, No. INAÇ, DIRECTION 448 5-1. PROGRAPHY MODULE
APPLICATION OF RESOURCES 449
MODULE OF
BEAM FORMATION
- co 533 531 535:
INTERFACE CIRCUIT ANTENNA (S) NETWORK TRANSCEIVER 537
CONTROLLER 539 541 OPERATING SYSTEM 542
CONTROL MODULE
OF COMMUNICATION 543 MANAGEMENT MODULE
COMPONENT CARRIER FEED 547. - IDENTIFIER MODULE
CELL TYPE CAGE 548 7 PROGRAMMING MODULE
APPLICATION OF RESOURCES No 5-2 / 5-3
- CIRCUIT
TRANSCEIVER: 6s7
659 CONTROLLER - | MEMORY 661 OPERATIONAL ISTEMA | HT. 662
COMMUNICATION CONTROL MODULE 6865
MEASUREMENT MODULE 667 CELL IDENTIFICATION MODULE 668
PROXIMITY DETECTION MODULE 663. CELL
LIMIT OF
SHOOTING. 3 669 DETERMIN- MODULE |
RESOURCE ACTION - Petition 870210011749, of 2/4/2021, p. 63/18 e -
- MCD starts operating in EB macro scell s1 (away from peak cell (s)) Ss2 EB macro determines the direction of the MCD and So formation calculations -: - - associated beam 7 IMCD sends trigger signal | RSRP for EB macro to indicate! EB macro program resources remains that it is not in the carrier for extension bai: EB peak reach using PDCCH BFed ae: EB peak limit transmits u information The MCD identification identifies peak base stations and associated RSRP falls below the MCD monitoring limit RSRP of EB peak RS in relation to the limit RSRP increases RSRP above the limit remains above MCD sends message from the trigger limit to EB Ss7 macro to indicate L2 that it is in the [E range of EB peak S8 EB macro program. resources for an extension bearer using PDCCH on the primary bearer —Petition 870210011749, of 2/4/2021, p. 64/75. O
CN 2: Y AAA) NE
O as | oe | only Í 3: N
FZ TO FAN:> ss 7 GO: E = Á i | :: Ê Ê Jd no. 35 7 E 38% o DA RR - ROS RR A 3 ren é E ROS: E e E RE AOS E À FEZ ER RSA: = 88 8 FE Ro SNS À = SO is SER v ASAE: 2 SO AND ASAE: o E RO RAS,: TO E if Ro RAS: o if RL RES: 8 GF jd F ES RsA RSS: ss po Matoso OS: & 2 3 2 RE Naa: oO 8 3 ts Rs NESSAS = o ES MA ROSA s A 8 ADA SS u. o 4 3 FA and Secatótatar: E SOSOÇA ANAOÇOS OA RES SINES SAE] 9 BRSDROSSS, OR:: = AA &À; FH 4 SS â UT SS A NR z -. : healthy $ healthy Ss: | s KR: 4). 3 AE 3; - EEA:: ENS at DEGSaa to ASRENRES | s and Hd 111 EN EA À: ee RN ns 4H ETENA Sães:. 3 RN Es AN: only the EEEF; o m Ss TAH HH E. ai 5 ao o HAHAHAHA o | À = N SH ENE SS FE N Bs 38 EA E | 53 TO THE EEA | By NO Se NA NRO
NO SSH OS. e ã AR NETTO EA scene AN ne> ER o CE NA E E 32 FERE Ee et do: EA Fl o or a. * it is. FEfrcecio 1 IS IRONS x OE:! | 22 5 Í j 2:! S x º:
FÊ à 2º - Petition 870210011749, of 02/04/2021, page 66/18 -
o> - as N as N es fly o
RE o nm RIAA to FINA, action DOCAS = À
CCVA AND PA AÇOOS A E Bor DERA E Fstev TA CIDA Lester statartatart 4 Fo Wa Ro OMR “st ser EE AMAS UU à eutuvo 1 2 E BO Rosas Aa aaaooos à nRp o Boo ERAS DL À Ts XE PICA NO aaa 4 EEZ / SERRAS É Bs à DEE ARARAS 2º IN Ig RREO CERA A Ze É gs EBSRO CAS ss ER Aa In Setotoratatarittanteritatto = 385 A 3 SS EE RNA 5 à Se 7 OO PE E ASAS 8 is SSIS FT EEE RAS ft o 2 ENE STA E EB CFR 5 3 o Z RE RIA $$ = F ZÁ ZA 8 RARA SSIS ASIA s.
FF O 8 8 = s 8> 3 (> - Z = 3 - S Ss oo NS 3 o insaaeiaaaenaaananaNAS! S uu & O 8 ZERO | Z z NV EE FAAAHHEHANHHEAAA À É 8 = o E ITED o | o UU RN & gs O | sNNSSS & EEN O | E> wu “CSHHOIHAINHAOSO = 3 mo Or ON HA 1 <Ss Ol FITA h FENEAN SEMOHEIAHAAH | | 2 ENO R Ea IO liner Nino E À Flgfisfe) Vessessesa RSESS a Ss SN L22fHo ROO Aco i EAN POE ATA 2 N EO FINCAAAA 7 Z HI TTITHONRHITOIA ITA ITO
DIÉIMENESIEA CUL EE RS EA 9 N O AS FHC 'N ccnnog AEE ASS s HFEEFHCZEAFHEFHEFEEA DE EN as ss>
FE $ ot os at x o x DE. 1 ms:
TT Tm A a and E ao | 8E Í 3: N sº st | - TAH +> A xE E; s ”8 8 'IS ERR 356» SSIS 386 a z OS - 83% G p sure ROSS E 2 SARA ACTIONS s% E RAS 826 E RO SAS | R boo: Io = se da RS ARS zZ om Ss Ro RS o 2 23 Rod SRA, sos RES 9 Z 288 PIAS 8 d> $ O RE IN THESE Ê Gl TER NOS: BS 00 REESSOS OE Sounds JA G OR ARS 3 ZA RSSNO ROS 3 AS RSS A RRSSSASSS ROSSAS "o> g Es RAR is Dn S a Ea Co $ [(X): s: TABLES TO TF |;: uu E NS A í E RN $:; s NJ NS fd , 2 - FARA <E ay s FAFE jo = as rs E EA: so and HH EEN ace: o "N Es S ETEAHHA: ENS AN à 83 o! o 2 Si wu o JH Ea Ê i | ê oo oe oH E EEE 3 | SANS SSH TENTO is | N o Ho EFE S5sea &: SF These are the A s Es: N N 2SHA Ao
NS SENA: FIN EEE fsSEes S 5 ENT .... EH a. *:: he ERA Act. H H NE, H H z: Ro 2nd EEE + EEE & Essesssas. to x: Ss x ia A RLALLAO LIA Ada 1/02/2021 page BUT
AAA -. | * | the ee
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CTIS o FIG.17

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法律状态:
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2021-03-23| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04W 72/04 Ipc: H04W 72/04 (2009.01), H04W 16/28 (2009.01) |

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2021-12-14| B350| Update of information on the portal [chapter 15.35 patent gazette]|

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