WO2012132295A1 - 送信装置、受信装置、送信方法、及び受信方法 - Google Patents
送信装置、受信装置、送信方法、及び受信方法 Download PDFInfo
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- WO2012132295A1 WO2012132295A1 PCT/JP2012/001855 JP2012001855W WO2012132295A1 WO 2012132295 A1 WO2012132295 A1 WO 2012132295A1 JP 2012001855 W JP2012001855 W JP 2012001855W WO 2012132295 A1 WO2012132295 A1 WO 2012132295A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
Definitions
- the present invention relates to a transmission device, a reception device, a transmission method, and a reception method.
- a radio communication relay station apparatus In response to such a request, in order to expand the coverage area of each base station, between the base station and the radio communication mobile station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbreviated as “mobile station”), a radio communication relay station apparatus (hereinafter abbre
- LTE-A Long Term Evolution Advanced
- Relay technology is also required to be compatible with LTE.
- FIG. 1 shows an example of a frame to which control signals and data are allocated in the LTE system and the LTE-A system.
- a downlink (DL: DownLink) control signal transmitted from a base station to a mobile station is transmitted by a downlink control channel such as PDCCH (Physical Downlink Control CHannel).
- PDCCH Physical Downlink Control CHannel
- DL grant that instructs DL data allocation and UL grant that instructs uplink (UL: UpLink) data allocation are transmitted by PDCCH.
- the DL grant notifies the mobile station that resources in the subframe in which this DL grant has been transmitted have been allocated.
- UL grant in the FDD system, UL grant informs the mobile station that resources in the target subframe 4 subframes after the subframe in which this UL grant is transmitted have been allocated.
- UL grant informs the mobile station that resources in the target subframe four or more subframes after the subframe in which this UL grant is transmitted have been allocated.
- the number of subframes in which UL grant is transmitted as a subframe to be allocated to a mobile station is determined by the time-division pattern for uplink and downlink (hereinafter referred to as “UL / DL configuration pattern ”).
- the UL subframe is a subframe that is four or more subframes after the subframe in which the UL grant is transmitted.
- the relay station transmits a control signal to the mobile station in the PDCCH area at the beginning of the subframe. Focusing on the relay station, since the downlink control signal must be transmitted to the mobile station, the relay station receives the signal transmitted from the base station by switching to reception processing after transmitting the control signal to the mobile station. Prepare for. However, since the base station also transmits the downlink control signal for the relay station at the timing when the relay station transmits the downlink control signal to the mobile station, the relay station transmits the downlink control signal transmitted from the base station. The signal cannot be received.
- LTE-A is considering providing an area (R-PDCCH for relay station (PDCCH for relay) area) in which the downlink control signal for relay station is placed in the data area.
- R-PDCCH it is considered that DLPgrant and UL grant are arranged similarly to PDCCH.
- R-PDCCH As shown in FIG. 1, it has been studied to arrange DL grant in 1st slot and arrange UL ⁇ grant in 2nd slot (see Non-Patent Document 1). By placing DL grant only in 1st slot, DL grant decoding delay is shortened, and the relay station transmits ACK / NACK for DL data (in FDD, it is sent 4 subframes after receiving DL grant).
- the relay station blind-decodes the downlink control signal transmitted from the base station using the R-PDCCH within the resource region (ie, “search space”) indicated by the higher layer signaling from the base station. By doing so, a downlink control signal addressed to the own station is found.
- the search space corresponding to R-PDCCH is notified from the base station to the relay station by higher layer signaling as described above.
- a method of notifying a search space corresponding to R-PDCCH (1) a method of notifying a PRB (Physical Resource Block) pair as one unit, and (2) notifying an RBG (Resource Block Group) as one unit. Both methods are conceivable.
- a PRB (Physical Resource Block) pair means a set obtained by combining PRBs of the first slot and the second slot, whereas PRB means each of the PRBs of the first slot and the second slot.
- PRB pair may be simply referred to as PRB.
- a resource block group (RBG) is a unit used when a plurality of PRBs are assigned together. The RBG size is determined based on the bandwidth of the communication system.
- R-PDCCH has four levels 1, 2, 4, and 8 as aggregation levels (see, for example, Non-Patent Document 1). Levels 1, 2, 4, and 8 have 6, 6, 2, and two types of mapping candidate positions, respectively.
- the mapping candidate position is an area candidate to which the control signal is mapped.
- FIG. 2 is a diagram illustrating an example of a search space corresponding to R-PDCCH. Each ellipse indicates a search space for each aggregation level.
- a plurality of mapping candidate positions in each search space at each aggregation level are continuously arranged in a VRB (Virtual Resource Block). Each mapping candidate position in the VRB is mapped to PRB (Physical Resource Block) by higher layer signaling.
- VRB Virtual Resource Block
- a dynamic allocation method data resources are notified from the base station to the terminal for each subframe by DL grant or UL grant.
- SPS single control signal
- a series of data groups until the end of the SPS is notified by the second control signal.
- Two adjacent frames included in a transmission scheduled subframe group in the SPS method have a predetermined frame interval.
- the predetermined resource is common between the transmission scheduled subframes.
- the SPS method if there is a data resource instruction in the dynamic allocation method in an arbitrary subframe in the scheduled transmission subframe group, the dynamic allocation is given priority in the arbitrary subframe, and depending on the SPS method, Data transmission by the allocated data resource is skipped.
- the SPS method is suitable for communication in which small packets are continuously generated.
- the communication in which small packets are continuously generated is, for example, voice communication.
- the control signal directed to the terminal under the base station may also be arranged in the data area to which the R-PDCCH is mapped (that is, the “R-PDCCH area for the terminal”). It is being considered.
- the control signal in the data area in this way, transmission power control for a control signal transmitted to a terminal existing near the cell edge, or interference control or other control given to another cell by the transmitted control signal Interference control given from the cell to the own cell can be realized.
- the search space corresponding to the R-PDCCH for terminals is a resource area where a control signal transmitted from the base station to the terminals may be mapped. Furthermore, a search space corresponding to R-PDCCH is set for each terminal.
- the SPS method between the base station and the terminal is defined in the LTE system
- the SPS method between the base station and the terminal is also applied to the LTE-A system. Therefore, it is necessary to define an SPS method when a control signal transmitted from the base station to the terminal is mapped to the R-PDCCH region for the terminal, but this has not been studied yet.
- the LTE-A system it is determined that the SPS method between the base station and the relay station is not supported.
- An object of the present invention is to transmit a series of data groups of N (N is a natural number of 2 or more) transmission subframes even when a control signal is transmitted in a resource region that can be used for both a control channel and a data channel. It is intended to provide a transmission device, a reception device, a transmission method, and a reception method that can be distributed and transmitted to data resources.
- the transmission device maps the control signal for the reception device to the first resource region that can be used for either the control channel or the data channel or the second resource region that can be used for the control channel.
- a transmission apparatus that transmits and distributes a series of data groups to data resources in each of N (N is a natural number of 2 or more) transmission subframes and transmits the data groups to the reception apparatus.
- a resource block group that is composed of M (M is a natural number greater than or equal to 2) resource blocks (RB) and is common among transmission subframes, and generating means for generating a control signal
- Setting means for setting a control resource area to which an allocation control signal is mapped in the first resource area
- Mapping means for mapping the series of data groups to the set data resource and mapping the allocation control signal to the control resource area, wherein the setting means includes the N transmission subframes.
- the resource area set as the control resource area in the first transmission subframe is set as the data resource in the transmission subframes other than the first transmission subframe.
- the reception device receives a control signal transmitted from a transmission device in a first resource region that can be used for either a control channel or a data channel or a second resource region that can be used for a control channel. And a receiving device that receives a series of data groups distributed from the data resources in each of N (N is a natural number of 2 or more) transmission subframes and transmitted from the transmitting device, and is included in the received signal.
- a detection means for detecting an allocation control signal for the data resource and M (M is a natural number of 2 or more) RBs including a resource block (RB) in which the allocation control signal is detected, and a transmission sub Data component extraction target area corresponding to the data resource in a resource block group (RBG) that is common between frames
- Extraction means for extracting the signal component of the received signal from the received signal wherein the extraction means is a resource in which the allocation control signal is detected in a first transmission subframe of the N transmission subframes.
- the region is a data component extraction target region in transmission subframes other than the first transmission subframe.
- the control signal for the reception apparatus is mapped to the first resource area that can be used for either the control channel or the data channel or the second resource area that can be used for the control channel.
- a transmission method for transmitting and distributing a series of data groups to data resources in each of N (N is a natural number greater than or equal to 2) transmission subframes and transmitting the data groups to the receiving device, the allocation for the data resources
- a control signal is generated, and the data resource and the allocation control signal are generated in a resource block group (RBG) configured by M (M is a natural number of 2 or more) resource blocks (RB) and common among transmission subframes.
- a control resource area to which the data is to be mapped is set in the first resource area, and the set data resource is set.
- the series of data groups are mapped to the source, the allocation control signal is mapped to the control resource area, and is set as the control resource area in the first transmission subframe of the N transmission subframes.
- the resource area is set as the data resource in transmission subframes other than the first transmission subframe.
- the reception method of one embodiment of the present invention receives a control signal transmitted from a transmission apparatus in a first resource area that can be used for either a control channel or a data channel or a second resource area that can be used for a control channel. And a reception method for receiving a series of data groups distributed to data resources in each of N (N is a natural number of 2 or more) transmission subframes and transmitted from the transmission device, and included in the received signal
- An allocation control signal for the data resource is detected, and is composed of M (M is a natural number of 2 or more) RBs including a resource block (RB) in which the allocation control signal is detected and between transmission subframes
- the resource region in which the allocation control signal is detected in the first transmission subframe among the N transmission subframes is extracted from the reception signal, and the resource region in which the allocation control signal is detected is a transmission other than the first transmission subframe.
- N is a natural number of 2 or more transmission subframes. It is possible to provide a transmission device, a reception device, a transmission method, and a reception method that can be distributed and transmitted to data resources in each of the above.
- Main configuration diagram of base station according to Embodiment 1 of the present invention Main configuration diagram of terminal according to Embodiment 1 of the present invention
- the block diagram which shows the structure of the base station which concerns on Embodiment 1 of this invention.
- the figure which uses for description of the mapping resource pattern which concerns on Embodiment 1 of this invention The block diagram which shows the structure of the terminal which concerns on Embodiment 1 of this invention.
- Diagram for explaining PDSCH allocation method 1 using DL grant Diagram for explaining mapping resource pattern in PDSCH allocation method 1 Diagram for explaining PDSCH allocation method 2 using DL grant Diagram for explaining mapping resource pattern in PDSCH allocation method 2
- the figure which uses for description of the mapping resource pattern in the allocation method 4 of PDSCH The figure for demonstrating the other mapping resource pattern in the allocation method 4 of PDSCH
- the figure for demonstrating the other mapping resource pattern in the allocation method 4 of PDSCH The figure for demonstrating the other mapping resource pattern in the allocation method 4 of PDSCH Diagram for explaining PDSCH allocation method 5 by DL grant Diagram for explaining mapping resource pattern in PDSCH allocation method 5
- DL grant and PDSCH must be arranged in the same RBG in any subframe. There is. That is, as shown in FIG. 3A, when a DL grant is mapped to an arbitrary RBG region (a) in an arbitrary subframe, the regions (b) and (c) in the arbitrary subframe are determined by the DL grant. Assigned to PDSCH.
- RBG is composed of M (M is a natural number of 2 or more) PRB pairs.
- the area (a) is an area in the first PRB (ie, “arrangement PRB”) pair in which DL grant is arranged, and is an area in the first slot excluding the PDCCH area.
- Region (b) is a region belonging to the second slot in the arrangement PRB pair, and is a region set as a UL grant search space.
- the region (c) is a region in the PRB pair excluding the arranged PRB pair among the M PRB pairs constituting the RBG including the arranged PRB pair and excluding the PDCCH region.
- the resource allocation bit value for the RBG is set to 1 in DL grant.
- DL grant and UL grant are mapped to the same RBG in an arbitrary subframe
- DL grant is mapped to region (a) and UL grant is assigned to region (b) as shown in FIG. 3B.
- Mapped to Regions (b) and (c) are not allocated to PDSCH.
- the value of the resource allocation bit for this RBG included in DL grant is set to zero. Therefore, the terminal on the receiving side of the downlink control signal shows whether the resource allocation in FIG. 3A is performed depending on whether the value of the resource allocation bit for each RBG included in the DL grant addressed to itself is 0 or 1 It is possible to recognize whether 3B resource allocation is performed.
- the DL Grant and PDSCH may be arranged in the same RBG.
- region (a) is excluded as PDSCH resources, and regions (b) and (c) are used as PDSCH resources.
- the base station transmits DL grant and assigns the PDSCH in RBG units to the terminal, the following problems arise when the SPS method is adopted. I found it. That is, when the PDSCH allocation method shown in FIG. 3 is applied to the SPS method, the data resource (that is, the region (b) is allocated to the first transmission scheduled subframe (also simply referred to as a transmission subframe) by the SPS method. ) And (c)) may be used in the second and subsequent transmission scheduled subframes (see FIG. 4). However, in this data transmission, the area (a) is not used as a data resource even in the second and subsequent transmission scheduled subframes according to the SPS method, and there is a wasteful resource.
- the first object of the present invention is to reduce the wasteful resources.
- Embodiments that achieve this object are mainly Embodiments 1, 2, and 5.
- the area (a) is used as a data resource in the second and subsequent transmission scheduled subframes by the SPS method.
- Such a data transmission method is particularly effective when the R-PDCCH aggregation level is high. This is because the higher the aggregation level, the greater the number of placement PRBs.
- the region (a) in each of the four PRBs to which DL grant is mapped in the first transmission scheduled subframe It can be used as a PDSCH region.
- the present inventors have found that it is necessary to transmit a UL grant even in an RBG transmission target RBG in a transmission scheduled subframe by the SPS method. That is, the second object of the present invention is to realize DL data transmission by the SPS method that enables UL grant transmission even in the RBG transmission target RBG in the transmission scheduled subframe by the SPS method.
- Embodiments that achieve this object are mainly Embodiments 3, 4, and 5.
- the communication system according to Embodiment 1 of the present invention includes a transmission device and a reception device.
- the transmission apparatus is described as base station 100 and the reception apparatus is described as terminal 200.
- This communication system is, for example, an LTE-A system.
- the base station 100 is, for example, an LTE-A base station
- the terminal 200 is, for example, an LTE-A terminal.
- FIG. 5 is a main configuration diagram of base station 100 according to Embodiment 1 of the present invention.
- the base station 100 uses a control signal for the terminal 200 in a first resource region (here, R-PDCCH for the terminal) that can be used for either the control channel or the data channel, or a second resource that can be used for the control channel. It maps and transmits to a field (here PDCCH). Furthermore, base station 100 distributes a series of data groups to data resources in each of N (N is a natural number of 2 or more) transmission scheduled subframes, and transmits the data resources to terminal 200. Then, the control signal generation unit 103 generates an allocation control signal (DL grant here) for allocating data resources.
- DL grant allocation control signal
- the transmission control unit 102 performs data transmission in a resource block group (RBG) that is configured by M (M is a natural number of 2 or more) resource blocks (here, PRB pairs) and is common between transmission scheduled subframes.
- RBG resource block group
- M is a natural number of 2 or more resource blocks (here, PRB pairs) and is common between transmission scheduled subframes.
- a control resource area for mapping resources and allocation control signals is set in the first resource area.
- the signal allocation unit 106 maps a series of data groups to the set data resource, and maps the allocation control signal to the control resource area.
- the resource area set as the control resource area in the first transmission scheduled subframe among the N transmission scheduled subframes is the data resource in the transmission scheduled subframes other than the first transmission scheduled subframe.
- FIG. 6 is a main configuration diagram of terminal 200 according to Embodiment 1 of the present invention.
- the terminal 200 receives the control signal transmitted from the transmission device in the first resource area usable for both the control channel and the data channel or the second resource area usable for the control channel. Furthermore, terminal 200 receives a series of data groups transmitted from base station 100 distributed to data resources in each of N (N is a natural number of 2 or more) transmission scheduled subframes. Then, the control signal receiving unit 205 detects an allocation control signal for data resources included in the received signal.
- the signal separation unit 202 includes M (M is a natural number greater than or equal to 2) RBs including the resource block (here, the PRB pair) in which the allocation control signal is detected in the control signal reception unit 205 and is scheduled to be transmitted.
- M is a natural number greater than or equal to 2
- a signal component corresponding to a data component extraction target region in a resource block group (RBG) that is common between subframes is extracted from the received signal.
- RBG resource block group
- the resource area in which the allocation control signal is detected in the first transmission scheduled subframe among the N transmission scheduled subframes is set as the data component extraction target area in the second and subsequent transmission scheduled subframes.
- FIG. 7 is a block diagram showing a configuration of base station 100 according to Embodiment 1 of the present invention.
- the base station 100 includes an allocation method determination unit 101, a transmission control unit 102, a control signal generation unit 103, an error correction coding unit 104, a modulation unit 105, a signal allocation unit 106, and radio transmission.
- Unit 107, radio reception unit 108, demodulation unit 109, and error correction decoding unit 110 is a block diagram showing a configuration of base station 100 according to Embodiment 1 of the present invention. 7, the base station 100 includes an allocation method determination unit 101, a transmission control unit 102, a control signal generation unit 103, an error correction coding unit 104, a modulation unit 105, a signal allocation unit 106, and radio transmission.
- Unit 107, radio reception unit 108, demodulation unit 109, and error correction decoding unit 110 is a block diagram showing a configuration of base station 100 according to Embodiment 1 of the present invention. 7, the base station 100
- the allocation method determination unit 101 receives “transmission signal information” and “report information” transmitted from the terminal 200 as inputs.
- “Transmission signal information” is information representing the characteristics of the transmission data signal, and includes, for example, a communication type such as voice communication or data communication, or the data size or QoS (Quality of Service) of the transmission data signal.
- the “report information” includes a scheduling request or a buffer status report transmitted from the terminal 200.
- the allocation method determining unit 101 selects, from the “dynamic allocation method” and the “SPS method”, the resource allocation method to be applied to the transmission of the data signal that is the target of resource allocation based on the transmission signal information and the report information. To do.
- the identification information of the selected resource allocation method (hereinafter simply referred to as “allocation method identification information”) is output to transmission control section 102.
- the transmission control unit 102 receives the allocation method identification information output from the allocation method determination unit 101 when there is a data signal to be transmitted. Then, the transmission control unit 102 determines “mapping resource patterns” of the control signal and the data signal according to the allocation method identification information, and outputs information on the determined mapping resource pattern to the signal allocation unit 106.
- mapping resource pattern 1 in the case where the allocation method identification information indicates the SPS method has the following configuration.
- the mapping resource pattern 1 includes N (N is a natural number of 2 or more) transmission scheduled subframes.
- N is a natural number of 2 or more) transmission scheduled subframes.
- area (a) described above is used as a DL grant mapping resource, and areas (b) and (c) are used as data resources.
- areas (b) and (c) are used as data resources.
- all of the areas (a), (b), and (c) are data resources (see FIG. 8).
- FIG. 8 particularly shows a transmission scheduled subframe when M is 2.
- the transmission control unit 102 when receiving the allocation method identification information, the transmission control unit 102 outputs a DL grant generation instruction to the control signal generation unit 103 together with the allocation method identification information. Also, if the input “report information” includes a scheduling request for an uplink data signal, the transmission control unit 102 determines a resource to which UL grant is mapped, and transmits information related to the resource to the signal allocation unit 106. And a UL grant generation instruction is output to the control signal generation unit 103.
- the transmission control unit 102 upon receiving the SPS transmission end information, the transmission control unit 102 outputs a DL request generation instruction to the control signal generation unit 103 together with the SPS transmission end information.
- control signal generation unit 103 When the control signal generation unit 103 receives the DL grant generation instruction together with the allocation method identification information, the control signal generation unit 103 generates a DL grant that is scrambled with RNTI (Radio Network Temporary Identity) corresponding to the allocation method identification information, and the signal allocation unit The data is output to 106.
- RNTI Radio Network Temporary Identity
- control signal generation unit 103 when receiving the UL grant generation instruction, the control signal generation unit 103 generates UL grant and outputs it to the signal allocation unit 106.
- control signal generation unit 103 when the control signal generation unit 103 receives the DL generation grant instruction together with the SPS transmission end information, the control signal generation unit 103 generates a DL generation including the SPS transmission end information.
- the error correction encoding unit 104 receives the transmission data signal, performs error correction encoding on the input transmission data signal, and outputs it to the modulation unit 105.
- Modulation section 105 performs modulation processing on the signal received from error correction coding section 104 and outputs the modulated transmission data signal to signal allocation section 106.
- the signal allocating unit 106 maps the DL grant received from the control signal generating unit 103 and the modulated transmission data signal received from the modulating unit 105 to the resource based on the mapping resource pattern received from the transmission controlling unit 102.
- the signal allocation unit 106 maps the UL grant received from the control signal generation unit 103 to the resource indicated by the information related to the UL grant grant resource received from the transmission control unit 102.
- a transmission signal is generated by mapping the transmission data signal and the control signal to predetermined resources. This transmission signal is output to radio transmission section 107.
- the wireless transmission unit 107 performs wireless transmission processing such as up-conversion on the input signal, and transmits it through the antenna.
- the radio reception unit 108 receives a signal transmitted from the terminal 200 via an antenna, performs radio processing such as down-conversion, and then outputs the signal to the demodulation unit 109.
- the demodulation unit 109 performs demodulation processing on the input signal and outputs the obtained signal to the error correction decoding unit 110.
- the error correction decoding unit 110 decodes the input signal and obtains report information and a received data signal from the terminal 200.
- the obtained report information from the terminal 200 is output to the allocation method determination unit 101 and the transmission control unit 102. Further, the obtained reception data signal is output to the functional unit at the subsequent stage.
- FIG. 9 is a block diagram showing a configuration of terminal 200 according to Embodiment 1 of the present invention.
- a terminal 200 includes a radio reception unit 201, a signal separation unit 202, a demodulation unit 203, an error correction decoding unit 204, a control signal reception unit 205, an error correction coding unit 206, and a modulation unit 207.
- the radio reception unit 201 receives a signal transmitted from the base station 100 via an antenna, performs radio processing such as down-conversion, and outputs the signal to the signal separation unit 202.
- the signal separation unit 202 outputs the reception signal received from the wireless reception unit 201 to the control signal reception unit 205.
- the signal separation unit 202 extracts a signal component corresponding to the data resource indicated by the information on the mapping resource pattern output from the control signal receiving unit 205 (that is, a signal component corresponding to the downlink data signal) from the received signal.
- the extracted signal is output to the demodulation unit 203.
- Demodulation section 203 demodulates the signal output from signal separation section 202 and outputs the demodulated signal to error correction decoding section 204.
- the error correction decoding unit 204 decodes the demodulated signal output from the demodulating unit 203 and outputs the obtained received data signal.
- the control signal receiving unit 205 extracts a signal component corresponding to the R-PDCCH region from the received signal received from the signal separating unit 202, and performs blind decoding on the extracted signal component, thereby controlling the device addressed to the own device. Detect the signal (DL grant or UL grant). As described above, DL grant is scrambled by SPS or dynamic allocation RNTI, so allocation method identification information is obtained by unscrambling both SPS RNTI and dynamic allocation RNTI. I understand.
- the control signal reception unit 205 outputs information on the mapping resource pattern corresponding to the SPS method to the signal separation unit 202.
- This mapping resource pattern is the same as that used in the base station 100.
- control signal receiving unit 205 outputs the detected UL grant to the signal assigning unit 208.
- the error correction coding unit 206 receives the transmission data signal, performs error correction coding on the transmission data signal, and outputs it to the modulation unit 207.
- Modulation section 207 modulates the signal output from error correction coding section 206 and outputs the modulated signal to signal allocation section 208.
- the signal allocation unit 208 maps the signal output from the modulation unit 207 according to UL grant received from the control signal reception unit 205, and outputs the mapped signal to the wireless transmission unit 209.
- the wireless transmission unit 209 performs wireless transmission processing such as up-conversion on the input signal, and transmits it via the antenna.
- the transmission control unit 102 outputs information on the mapping resource pattern 1 corresponding to the SPS method to the signal allocation unit 106.
- the control signal generation unit 103 generates a DL grant including the allocation method identification information and outputs it to the signal allocation unit 106.
- the signal allocation unit 106 maps the DL received from the control signal generation unit 103 and the modulated transmission data signal received from the modulation unit 105 to the resource based on the mapping resource pattern 1 received from the transmission control unit 102. Thus, a transmission signal is generated by mapping the transmission data signal and the control signal to predetermined resources. Then, this transmission signal is transmitted to terminal 200.
- control signal reception section 205 extracts a signal component corresponding to the R-PDCCH region from the received signal received from signal separation section 202, and performs blind decoding on the extracted signal component, thereby automatically Detect the control signal (DL grant or UL grant) addressed to the device.
- control signal receiving unit 205 outputs information on the mapping resource pattern 1 corresponding to the SPS method to the signal separating unit 202.
- the signal separation unit 202 extracts a signal component corresponding to the data resource indicated by the information on the mapping resource pattern 1 output from the control signal reception unit 205 (that is, a signal component corresponding to the downlink data signal) from the received signal,
- the extracted signal is output to demodulation section 203.
- the base station 100 uses the first resource region (here, the R-PDCCH for the terminal) that can use the control signal for the terminal 200 for both the control channel and the data channel. ) Or a second resource region (here, PDCCH) that can be used for the control channel. Furthermore, base station 100 distributes a series of data groups to data resources in each of N (N is a natural number of 2 or more) transmission scheduled subframes, and transmits the data resources to terminal 200. Then, the transmission control unit 102 performs data transmission in a resource block group (RBG) that is configured by M (M is a natural number of 2 or more) resource blocks (here, PRB pairs) and is common between transmission scheduled subframes.
- RBG resource block group
- M is a natural number of 2 or more resource blocks
- a control resource area for mapping resources and allocation control signals (here, DL grant) is set in the first resource area.
- the resource area set as the control resource area in the first transmission scheduled subframe among the N transmission scheduled subframes is the data resource in the transmission scheduled subframes other than the first transmission scheduled subframe.
- the resource area (here, the area (a)) set as the control resource in the first transmission scheduled subframe is empty.
- terminal 200 is transmitted from the transmission apparatus in the first resource area that can be used for either the control channel or the data channel or the second resource area that can be used for the control channel.
- a control signal is received.
- terminal 200 receives a series of data groups transmitted from base station 100 distributed to data resources in each of N (N is a natural number of 2 or more) transmission scheduled subframes.
- the signal separation unit 202 includes M (M is a natural number greater than or equal to 2) RBs including the resource block (here, the PRB pair) in which the allocation control signal is detected in the control signal reception unit 205 and is scheduled to be transmitted.
- a signal component corresponding to a data component extraction target region in a resource block group (RBG) that is common between subframes is extracted from the received signal.
- RBG resource block group
- the resource area in which the allocation control signal is detected in the first transmission scheduled subframe among the N transmission scheduled subframes is set as the data component extraction target area in the second and subsequent transmission scheduled subframes.
- the resource area (here, the area (a)) set as the control resource in the first transmission scheduled subframe is empty.
- all of the areas (a), (b), and (c) are set as data component extraction target areas.
- the second embodiment relates to a variation of the mapping resource pattern corresponding to the SPS method.
- the mapping resource pattern 2 in the second embodiment has the following configuration.
- the mapping resource pattern 2 includes N (N is a natural number of 2 or more) transmission scheduled subframes.
- N is a natural number of 2 or more) transmission scheduled subframes.
- the above-described region (a) is used as the DL grant mapping resource.
- the areas (b) and (c) are not data resources.
- all of the areas (a), (b), and (c) are data resources.
- mapping resource pattern 2 By using this mapping resource pattern 2, the size of data received in the second and subsequent transmission scheduled subframes can be made equal. This facilitates taking the error rate into account when the base station 100 determines the resource amount.
- Embodiment 3 is an embodiment for achieving the second object described above.
- the base station and terminal according to Embodiment 3 are the same as base station 100 and terminal 200 according to Embodiment 1, and will be described with reference to FIGS.
- the transmission control unit 102 receives the allocation method identification information output from the allocation method determination unit 101 when there is a data signal to be transmitted. Then, the transmission control unit 102 determines “mapping resource patterns” of the control signal and the data signal according to the allocation method identification information, and outputs information on the determined mapping resource pattern to the signal allocation unit 106.
- the “mapping resource pattern” in the case where the allocation method identification information indicates the SPS method has the following configuration.
- the mapping resource pattern 3 includes N (N is a natural number of 2 or more) transmission scheduled subframes.
- N is a natural number of 2 or more) transmission scheduled subframes.
- the above-described region (a) is used as a DL grant mapping resource, and among a plurality of PRB pairs to be allocated by the DL grant.
- An area in the PRB pair excluding the arranged PRB pair and excluding the PDCCH area is a data resource.
- the next area is a data resource.
- FIG. 10 is a diagram for explaining the mapping resource pattern 3.
- FIG. 10 shows a mapping resource pattern particularly when the number of PRB pairs to be assigned by DL grant is four and the four PRB pairs straddle two RBGs. That is, as shown in FIG. 10A, in the first transmission scheduled subframe of mapping resource pattern 3, region (b) and three regions (c) are data resources. On the other hand, as shown in FIG. 10B, in the second and subsequent transmission scheduled subframes of mapping resource pattern 3, when the aggregation level of the search space of DL grant is 2, four PRB pairs to be allocated by DL grant The region (c) in the PRB pair that is not the DL grant search space is a data resource.
- signal separation section 202 corresponds to a signal component corresponding to the data resource indicated by the information on mapping resource pattern 3 output from control signal reception section 205 (that is, corresponding to the downlink data signal). Signal component) to be extracted from the received signal, and the extracted signal is output to the demodulator 203.
- mapping resource pattern 3 UL grant can be mapped to the PRB pair to be assigned by DL grant in the second and subsequent transmission scheduled subframes.
- the region (b) may be excluded from the data resource, and the UL grant may be mapped to the region (b).
- Mapping resource pattern 3 is particularly effective when the aggregation level of the UL search space is large. This is because if the aggregation level of the search space of UL ⁇ ⁇ ⁇ grant is large, the number of resources required for UL grant allocation increases, so if the search space is blocked by data resources, UL grant may not be assigned. Because.
- the fourth embodiment is an embodiment for achieving the second object described above.
- the base station and terminal according to Embodiment 4 are the same as base station 100 and terminal 200 according to Embodiment 1, and will be described with reference to FIGS.
- the transmission control unit 102 receives the allocation method identification information output from the allocation method determination unit 101 when there is a data signal to be transmitted. Then, the transmission control unit 102 determines “mapping resource patterns” of the control signal and the data signal according to the allocation method identification information, and outputs information on the determined mapping resource pattern to the signal allocation unit 106.
- the “mapping resource pattern” in the case where the allocation method identification information indicates the SPS method has the following configuration.
- the mapping resource pattern 4 includes N (N is a natural number of 2 or more) transmission scheduled subframes.
- N is a natural number of 2 or more) transmission scheduled subframes.
- the area (a) described above is a DL grant mapping resource, and the areas (b) and (c) are data resources. (See FIG. 11A).
- the area (c) is used as a data resource (see FIG. 11B).
- signal separation section 202 corresponds to a signal component corresponding to the data resource indicated by the information on mapping resource pattern 4 output from control signal receiving section 205 (that is, corresponding to the downlink data signal). Signal component) to be extracted from the received signal, and the extracted signal is output to the demodulator 203.
- UL grant can be mapped to the PRB pair in which DL grant is mapped in the first transmission scheduled subframe in the second and subsequent transmission scheduled subframes. Further, ULrantgrant can be mapped other than the PRB to be assigned by DL grant. In this case, the aggregation level of UL grant can be made larger than the aggregation level of DL grant. Also, since DL grant is mapped to a resource with good channel quality, UL grant can also be mapped to a resource with good quality by mapping DL grant and UL grant to the same PRB pair. In addition, since it is assumed that the PDSCH size is small in VoIP that is often transmitted by the SPS method, it is effective to be able to multiplex data and UL grant within the same RBG.
- the fifth embodiment is an embodiment for achieving the first and second objects described above.
- the base station and terminal according to Embodiment 5 are the same as base station 100 and terminal 200 according to Embodiment 1, and will be described with reference to FIGS.
- the transmission control unit 102 receives the allocation method identification information output from the allocation method determination unit 101 when there is a data signal to be transmitted. Then, the transmission control unit 102 determines “mapping resource patterns” of the control signal and the data signal according to the allocation method identification information, and outputs information on the determined mapping resource pattern to the signal allocation unit 106.
- the “mapping resource pattern” in the case where the allocation method identification information indicates the SPS method has the following configuration.
- the mapping resource pattern 5 includes N (N is a natural number of 2 or more) transmission scheduled subframes.
- N is a natural number of 2 or more) transmission scheduled subframes.
- the area (a) described above is used as a DL grant mapping resource, and the areas (b) and (c) are used as data resources. (See FIG. 12A).
- the areas (a) and (c) are data resources (see FIG. 12B).
- signal demultiplexing section 202 corresponds to a signal component corresponding to a data resource indicated by information on mapping resource pattern 5 output from control signal receiving section 205 (that is, corresponding to a downlink data signal). Signal component) to be extracted from the received signal, and the extracted signal is output to the demodulator 203.
- mapping resource pattern 5 UL grant can be mapped to the PRB pair in which DL grant is mapped in the first transmission scheduled subframe in the second and subsequent transmission scheduled subframes.
- a resource area here, area (a)
- UL grant can also be mapped to a resource with good quality by mapping DL grant and UL grant to the same PRB pair.
- Embodiments 1 to 5 can be switched according to the DL grant aggregation level.
- the transmission control unit 102 and the signal separation unit 202 can switch the mapping resource pattern according to the magnitude relation between the DL aggregation grant level and the RBG size. Specifically, the transmission control unit 102 and the signal separation unit 202 select the mapping resource pattern 4 or 5 when the DL grant aggregation level is smaller than or equal to the RBG size. On the other hand, when the DL ⁇ grant aggregation level is larger than the RBG size, the transmission control unit 102 and the signal separation unit 202 select the mapping resource pattern 3.
- the transmission control unit 102 and the signal separation unit 202 can switch the mapping resource pattern according to only the DL aggregation grant level. Specifically, the transmission control unit 102 and the signal separation unit 202 select the mapping resource pattern 4 or 5 when the DL grant aggregation level is 4 or 8. On the other hand, when the DL ⁇ grant aggregation level is 1 or 2, the transmission control unit 102 and the signal separation unit 202 select the mapping resource pattern 3.
- the mapping resource pattern described in the first to fifth embodiments can be switched based on the resource area in which the UL grant is transmitted. Specifically, when the UL grant is transmitted in the PDCCH region, the transmission control unit 102 and the signal separation unit 202 select the mapping resource pattern 1 or 2. On the other hand, when a UL grant is transmitted in the R-PDCCH region, the transmission control unit 102 and the signal separation unit 202 select the mapping resource pattern 3, 4 or 5. In this case, whether the UL grant is transmitted in the PDCCH region or the R-PDCCH region is predetermined.
- the DL-grant R-PDCCH may be a resource in which the DL-grant is actually transmitted to the terminal 200, the entire DL-grant search space, or the same. It may include a search space of different aggregation levels with a start position.
- the R-PDCCH in each of the above embodiments is sometimes called enhanced PDCCH.
- the R-PDCCH includes a “interleaved type” in which R-PDCCHs for a plurality of terminals are interleaved and R-PDCCHs for a plurality of terminals are arranged in the same PRB, and for a single terminal There is a “non-interleaving type” in which only R-PDCCH is allocated to the same PRB.
- the mapping resource pattern described in Embodiments 1 to 5 may be applied only to the type without interleaving.
- the terminal 200 attempts to detect the dynamic allocation DL grant and the DL notification granting the stop of the SPS scheme in the area (a) in all scheduled transmission subframes.
- the terminal 200 gives priority to data transmission by the dynamic allocation method without performing data transmission by the SPS method.
- terminal 200 does not perform data transmission according to the SPS scheme after the transmission scheduled subframe in which the DL grant that notifies the stop of the SPS scheme is detected.
- FIG. 13 is a diagram for explaining PDSCH allocation method 1 using DL grant.
- region (b) is explicitly allocated as a data resource by DL grant.
- the area (c) is implicitly allocated as a data resource regardless of the value of the resource allocation bit.
- FIG. 13B when the resource allocation bit for this RBG is 0, the area (c) is allocated as a data resource. Thereby, even when there is a UL grant, the PDSCH can be allocated to the RBG to which the DL grant is mapped.
- mapping pattern 2 can be handled in the same manner as the mapping pattern 1 except that the data resource in the first transmission scheduled subframe is different from the mapping pattern 1.
- mapping resource pattern 1-5 can be combined without modifying the mapping resource pattern.
- the resource allocation bit is 0, it may be necessary to modify the mapping resource pattern. Specifically, when the resource allocation bit is 0, in the mapping resource pattern 1, as shown in FIG. 14, the region (b) is not a data resource even in the second and subsequent transmission scheduled subframes. Specifically, in the second and subsequent transmission scheduled subframes, the areas (a) and (c) are data resources.
- mapping resource patterns 3, 4 and 5 can be handled in the same manner as when the resource allocation bit is 1.
- PDSCH allocation method 2 using DL grant The difference from PDSCH allocation method 1 by DL grant is that region (c) is not a data resource (see FIG. 15).
- mapping resource pattern 1-5 When the PDSCH allocation method 2 and the mapping resource pattern 1-5 are combined, it may be necessary to modify the mapping resource pattern. Even when the resource allocation bit is 1, it may be necessary to modify the mapping resource pattern. However, there is no combination of PDSCH allocation method 2 and mapping resource pattern 4.
- the mapping resource pattern 2 can be handled in the same manner as the mapping pattern 1 except that the data resource in the first transmission scheduled subframe is different from the mapping pattern 1.
- PDSCH allocation method 3 using DL grant A difference from PDSCH allocation method 2 by DL grant is that, when the resource allocation bit is 1, only region (c) is used as a data resource (see FIG. 18).
- the resource allocation bit When the resource allocation bit is 1, it can be handled in the same way as when the resource allocation bit is 0 in the PDSCH allocation method 1 by DL0grant.
- PDSCH allocation method 4 using DL grant the area (c) is divided into a first slot area (c-1) and a second slot area (c-2).
- FIG. 19 is a diagram for explaining PDSCH allocation method 4 by DL grant.
- the resource allocation bit is 1, regions (b) and (c-2) are allocated as data resources by DL grant.
- FIG. 19B when the resource allocation bit is 0, the handling is the same as in the case of PDSCH allocation method 2 by DL grant.
- mapping resource pattern 1-5 When the PDSCH allocation method 4 and the mapping resource pattern 1-5 are combined, it may be necessary to modify the mapping resource pattern. Even when the resource allocation bit is 1, it may be necessary to modify the mapping resource pattern.
- mapping resource pattern 1 is described in Embodiment 1 except that the area (c-1) is excluded from the data resource as shown in FIG. This is the same as the mapping resource pattern.
- mapping resource pattern 4 As shown in FIG. 21, except for the area (c-1) being excluded from the data resources, the mapping resource pattern described in Embodiment 4 It is the same.
- DL grants are arranged across a plurality of adjacent PRBs. Accordingly, the region (b) is handled by being divided into a plurality of partial regions in PRB units.
- the UL grant is mapped to a part of the plurality of partial areas. That is, in PDSCH allocation method 5, the DL grant search space and the UL grant search space are different.
- FIG. 23 is a diagram for explaining PDSCH allocation method 5 using DL grant.
- the resource assignment bit is 1, areas (b-2) and (c) where UL grant is not mapped by DL grant are assigned as data resources.
- the resource allocation bit is 0, all of the areas (a), (b), and (c) are excluded from the data resources.
- mapping resource pattern 1 when the resource allocation bit is 1, in mapping resource pattern 1, areas (b-2) and (c) are set as data resources in the first transmission scheduled subframe as shown in FIG. 24A.
- the mapping resource pattern 1 as shown in FIG. 24B, the area (a) is set as the data resource in addition to the areas (b-2) and (c) in the second and subsequent transmission scheduled subframes.
- the mapping resource pattern 2 can be handled in the same manner as the mapping resource pattern 1 except that the mapping resource pattern 1 is different from the mapping resource pattern 1 in the first transmission scheduled subframe.
- the DL grant is mapped to the first slot, and the UL grant is mapped to the second slot. That is, the resource to which DL grant is mapped and the resource to which UL grant is mapped are divided on the time axis.
- the present invention is not limited to this, and the resource to which DL grant is mapped and the resource to which UL grant is mapped may be divided on the frequency axis (that is, subcarrier or PRB pair). .
- FIG. 25 is a diagram for explaining the PDSCH allocation method 6.
- a plurality of subcarriers constituting the arrangement PRB are divided into two subcarrier blocks.
- One of the two subcarrier blocks corresponds to the region (a), and the DL grant is mapped to this region (a).
- the other subcarrier block of the two subcarrier blocks corresponds to the region (b), and the UL grant is mapped to this region (b).
- the area (c) is a data resource as shown in FIG. 25A, while when the resource allocation bit is 0 as shown in FIG. 25B, the area (C) is not a data resource.
- the mapping pattern 1 is applied to the PDSCH allocation method 6
- the first transmission scheduled subframe is in the state shown in FIG. 26A
- the second and subsequent transmission scheduled subframes are in the state shown in FIG. 26B.
- FIG. 27 is a diagram for explaining the PDSCH allocation method 7.
- the DL grant is mapped to a region (a) excluding the PDCCH region in one PRB pair. Then, by this DL grant, regions (b) and (c) excluding the PDCCH regions in the other two PRB pairs are allocated as data resources.
- the areas (b) and (c) are data resources as shown in FIG. 27A, while the resource allocation bit is 0 as shown in FIG. 27B.
- UL grant is mapped to the area (b).
- the area (c) is not a data resource.
- the mapping pattern 1 is applied to the PDSCH allocation method 7
- the first transmission scheduled subframe is in the state shown in FIG. 28A
- the second and subsequent transmission scheduled subframes are in the state shown in FIG. 28B.
- the mapping pattern 3 is applied to the PDSCH allocation method 7
- the first transmission scheduled subframe is in the state shown in FIG. 29A
- the second and subsequent transmission scheduled subframes are in the state shown in FIG. 29B. That is, in the second and subsequent transmission scheduled subframes, resources (regions (a) and (c) in FIG. 29B) excluding the UL search space are data resources.
- each functional block used in the description of each of the above embodiments is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them. Although referred to as LSI here, it may be referred to as IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI, and implementation with a dedicated circuit or a general-purpose processor is also possible.
- An FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- the transmission apparatus, the reception apparatus, the transmission method, and the reception method of the present invention can transmit a series of data groups to N (N Is a natural number that can be distributed and transmitted to data resources in each of the sub-frames to be transmitted.
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Abstract
Description
[通信システムの概要]
本発明の実施の形態1に係る通信システムは、送信装置と受信装置とを有する。特に、本発明の実施の形態では、送信装置を基地局100とし、受信装置を端末200として説明する。この通信システムは、例えば、LTE-Aシステムである。そして、基地局100は、例えば、LTE-A基地局であり、端末200は、例えば、LTE-A端末である。
図7は、本発明の実施の形態1に係る基地局100の構成を示すブロック図である。図7において、基地局100は、割り当て方法決定部101と、送信制御部102と、制御信号生成部103と、誤り訂正符号化部104と、変調部105と、信号割り当て部106と、無線送信部107と、無線受信部108と、復調部109と、誤り訂正復号部110とを有する。
(1)マッピングリソースパターン1は、N(Nは2以上の自然数)個の送信予定サブフレームを含む。
(2)マッピングリソースパターン1の1番目の送信予定サブフレームにおいては、上記した領域(a)がDL grantのマッピングリソースとされると共に、領域(b)及び(c)がデータリソースとされる。
(3)マッピングリソースパターン1の2番目以降の送信予定サブフレームにおいては、領域(a)、(b)及び(c)の全てがデータリソースとされる(図8参照)。図8には、特に、Mが2である場合の送信予定サブフレームが示されている。
図9は、本発明の実施の形態1に係る端末200の構成を示すブロック図である。図9において、端末200は、無線受信部201と、信号分離部202と、復調部203と、誤り訂正復号部204と、制御信号受信部205と、誤り訂正符号化部206と、変調部207と、信号割り当て部208と、無線送信部209とを有する。
以上の構成を有する基地局100及び端末200の動作について説明する。ここでは、特に、制御信号が端末向けR-PDCCHで送信され且つ割り当て方法としてSPS方法が選択される場合について説明する。
実施の形態2は、SPS方法に対応するマッピングリソースパターンのバリエーションに関する。
(1)マッピングリソースパターン2は、N(Nは2以上の自然数)個の送信予定サブフレームを含む。
(2)マッピングリソースパターン2の1番目の送信予定サブフレームにおいては、上記した領域(a)がDL grantのマッピングリソースとされる。但し、領域(b)及び(c)は、データリソースとされない。
(3)マッピングリソースパターン2の2番目以降の送信予定サブフレームにおいては、領域(a)、(b)及び(c)の全てがデータリソースとされる。
実施の形態3は、上記した第2の目的を達成するための実施の形態である。実施の形態3に係る基地局及び端末は、実施の形態1に係る基地局100及び端末200と同様であるので、図7及び9を援用して説明する。
(1)マッピングリソースパターン3は、N(Nは2以上の自然数)個の送信予定サブフレームを含む。
(2)マッピングリソースパターン3の1番目の送信予定サブフレームにおいては、上記した領域(a)がDL grantのマッピングリソースとされると共に、そのDL grantによる割り当て対象である複数のPRBペアの内で配置PRBペアを除くPRBペア内の領域であって、PDCCH領域を除く領域がデータリソースとされる。
(3)マッピングリソースパターン3の2番目以降の送信予定サブフレームにおいては、次の領域がデータリソースとされる。すなわち、1番目の送信予定サブフレームにおいて領域(a)にマッピングされたDL grantによる割り当て対象である複数のPRBペアの内でそのDL grantのサーチスペースに設定されたPRBペアを除くPRBペア内の領域であって、PDCCH領域を除く領域である。
実施の形態4は、上記した第2の目的を達成するための実施の形態である。実施の形態4に係る基地局及び端末は、実施の形態1に係る基地局100及び端末200と同様であるので、図7及び9を援用して説明する。
(1)マッピングリソースパターン4は、N(Nは2以上の自然数)個の送信予定サブフレームを含む。
(2)マッピングリソースパターン4の1番目の送信予定サブフレームにおいては、上記した領域(a)がDL grantのマッピングリソースとされると共に、領域(b)及び(c)がは、データリソースとされる(図11A参照)。
(3)マッピングリソースパターン4の2番目以降の送信予定サブフレームにおいては、領域(c)のみがデータリソースとされる(図11B参照)。
実施の形態5は、上記した第1の目的及び第2の目的を達成するための実施の形態である。実施の形態5に係る基地局及び端末は、実施の形態1に係る基地局100及び端末200と同様であるので、図7及び9を援用して説明する。
(1)マッピングリソースパターン5は、N(Nは2以上の自然数)個の送信予定サブフレームを含む。
(2)マッピングリソースパターン5の1番目の送信予定サブフレームにおいては、上記した領域(a)がDL grantのマッピングリソースとされると共に、領域(b)及び(c)がは、データリソースとされる(図12A参照)。
(3)マッピングリソースパターン4の2番目以降の送信予定サブフレームにおいては、領域(a)及び(c)がデータリソースとされる(図12B参照)。
[1]実施の形態1乃至5において説明したマッピングリソースパターンを、DL grantのアグリゲーションレベルに応じて切り替えることもできる。
図13は、DL grantによるPDSCHの割り当て方法1の説明に供する図である。図13Aに示すように、このRBGに対するリソース割り当てビットが1の場合、DL grantによって領域(b)が明示的にデータリソースとして割り当てられる。ただし、領域(c)は、リソース割り当てビットの値に関わらず、暗示的にデータリソースとして割り当てられる。また、図13Bに示すように、このRBGに対するリソース割り当てビットが0の場合、領域(c)がデータリソースとして割り当てられる。これにより、UL grantが有る場合でも、DL grantをマッピングしたRBGにPDSCHを割り当てることができる。
DL grantによるPDSCHの割り当て方法1と異なる点は、領域(c)がデータリソースとされないことである(図15参照)。
DL grantによるPDSCHの割り当て方法2と異なる点は、リソース割り当てビットが1の場合、領域(c)のみがデータリソースとされることである(図18参照)。
PDSCHの割り当て方法4では、領域(c)が第1スロットの領域(c-1)と、第2スロットの領域(c-2)とに分けて扱われる。
PDSCHの割り当て方法5では、図23に示すように、DL grantが隣接する複数のPRBに跨って配置される。従って、領域(b)は、PRB単位の複数の部分領域に分けて扱われる。そして、UL grantは、その複数の部分領域の一部にマッピングされる。すなわち、PDSCHの割り当て方法5では、DL grantのサーチスペースとUL grantのサーチスペースとが異なっている。
図25は、PDSCHの割り当て方法6の説明に供する図である。図25Aに示すように、配置PRBを構成する複数のサブキャリアが2つのサブキャリアブロックに分割される。そして、その2つのサブキャリアブロックの内の1つが領域(a)に対応し、この領域(a)にDL grantがマッピングされる。また、その2つのサブキャリアブロックの内のもう1つのサブキャリアブロックが領域(b)に対応し、この領域(b)にUL grantがマッピングされる。
図27は、PDSCHの割り当て方法7の説明に供する図である。図27Aに示すように、1つのPRBペア内のPDCCH領域を除く領域(a)に、DL grantがマッピングされる。そして、このDL grantによって、他の2つのPRBペア内のPDCCH領域を除く領域(b)及び(c)がデータリソースとして割り当てられる。
101 割り当て方法決定部
102 送信制御部
103 制御信号生成部
104,206 誤り訂正符号化部
105,207 変調部
106,208 信号割り当て部
107,209 無線送信部
108,201 無線受信部
109,203 復調部
110,204 誤り訂正復号部
200 端末
202 信号分離部
205 制御信号受信部
Claims (10)
- 受信装置に対する制御信号を、制御チャネル及びデータチャネルのいずれにも使用可能な第1のリソース領域又は制御チャネルに使用可能な第2のリソース領域にマッピングして送信し、一連のデータ群をN(Nは2以上の自然数)個の送信サブフレームのそれぞれにおけるデータリソースに分配して前記受信装置へ送信する送信装置であって、
前記データリソースのための割り当て制御信号を生成する生成手段と、
M(Mは2以上の自然数)個のリソースブロック(RB)から構成され且つ送信サブフレーム間で共通であるリソースブロックグループ(RBG)において、前記データリソースと前記割り当て制御信号をマッピングする制御リソース領域とを前記第1のリソース領域内に設定する設定手段と、
前記設定されたデータリソースに前記一連のデータ群をマッピングし、前記制御リソース領域に前記割り当て制御信号をマッピングするマッピング手段と、
を具備し、
前記設定手段は、前記N個の送信サブフレームの内の第1番目の送信サブフレームにおいて前記制御リソース領域として設定したリソース領域を、前記第1番目の送信サブフレーム以外の送信サブフレームにおいては前記データリソースとして設定する、
送信装置。 - 前記RBGにおける前記第2のリソース領域を除く領域は、前記第1番目の送信サブフレームにおいて前記制御リソース領域として設定される第1領域と、前記第1領域を含むRBにおける前記第1領域を除く第2領域と、前記第1領域及び第2領域を含むRB以外のRBから構成される第3領域とを具備し、
前記設定手段は、前記N個の送信サブフレームのすべてにおける前記第3領域を前記データリソースとしてさらに設定する、
請求項1に記載の送信装置。 - 前記設定手段は、
前記第1番目の送信サブフレームにおいては、前記2領域及び前記第3領域を前記データリソースとして設定し、
前記第1番目の送信サブフレーム以外の送信サブフレームにおいては、前記第1領域、前記第2領域、及び前記第3領域のすべてを前記データリソースとして設定する、
請求項2に記載の送信装置。 - 前記設定手段は、
前記第1番目の送信サブフレームにおいては、前記2領域及び前記第3領域を前記データリソースとして設定し、
前記第1番目の送信サブフレーム以外の送信サブフレームにおいては、前記第2領域を除く、前記第1領域及び前記第3領域を前記データリソースとして設定する、
請求項2に記載の送信装置。 - 制御チャネル及びデータチャネルのいずれにも使用可能な第1のリソース領域又は制御チャネルに使用可能な第2のリソース領域において送信装置から送信された制御信号を含む受信信号を受信し、N(Nは2以上の自然数)個の送信サブフレームのそれぞれにおけるデータリソースに分配されて前記送信装置から送信された一連のデータ群を受信する受信装置であって、
前記受信信号に含まれる、前記データリソースのための割り当て制御信号を検出する検出手段と、
前記割り当て制御信号が検出されたリソースブロック(RB)を含むM(Mは2以上の自然数)個のRBから構成され且つ送信サブフレーム間で共通であるリソースブロックグループ(RBG)における前記データリソースに対応するデータ成分抽出対象領域内の信号成分を前記受信信号から抽出する抽出手段と、
を具備し、
前記抽出手段は、前記N個の送信サブフレームの内の第1番目の送信サブフレームにおいて前記割り当て制御信号が検出されたリソース領域を、前記第1番目の送信サブフレーム以外の送信サブフレームにおいてはデータ成分抽出対象領域とする、
受信装置。 - 前記RBGにおける前記第2のリソース領域を除く領域は、前記第1番目の送信サブフレームにおいて前記割り当て制御信号が検出された第1領域と、前記第1領域を含むRBにおける前記第1領域を除く第2領域と、前記第1領域及び第2領域を含むRB以外のRBから構成される第3領域とを具備し、
前記抽出手段は、前記N個の送信サブフレームのすべてにおける前記第3領域をさらに前記データ成分抽出対象領域とする、
請求項5に記載の受信装置。 - 前記抽出手段は、
前記第1番目の送信サブフレームにおいては、前記2領域及び前記第3領域を前記データ成分抽出対象領域とし、
前記第1番目の送信サブフレーム以外の送信サブフレームにおいては、前記第1領域、前記第2領域、及び前記第3領域のすべてを前記データ成分抽出対象領域とする、
請求項6に記載の受信装置。 - 前記抽出手段は、
前記第1番目の送信サブフレームにおいては、前記2領域及び前記第3領域を前記データ成分抽出対象領域とし、
前記第1番目の送信サブフレーム以外の送信サブフレームにおいては、前記第2領域を除く、前記第1領域及び前記第3領域を前記データ成分抽出対象領域とする、
請求項6に記載の受信装置。 - 受信装置に対する制御信号を、制御チャネル及びデータチャネルのいずれにも使用可能な第1のリソース領域又は制御チャネルに使用可能な第2のリソース領域にマッピングして送信し、一連のデータ群をN(Nは2以上の自然数)個の送信サブフレームのそれぞれにおけるデータリソースに分配して前記受信装置へ送信する送信方法であって、
前記データリソースのための割り当て制御信号を生成し、
M(Mは2以上の自然数)個のリソースブロック(RB)から構成され且つ送信サブフレーム間で共通であるリソースブロックグループ(RBG)において、前記データリソースと前記割り当て制御信号をマッピングする制御リソース領域とを前記第1のリソース領域内に設定し、
前記設定されたデータリソースに前記一連のデータ群をマッピングし、前記制御リソース領域に前記割り当て制御信号をマッピングし、
前記N個の送信サブフレームの内の第1番目の送信サブフレームにおいて前記制御リソース領域として設定されたリソース領域は、前記第1番目の送信サブフレーム以外の送信サブフレームにおいては前記データリソースとして設定される、
送信方法。 - 制御チャネル及びデータチャネルのいずれにも使用可能な第1のリソース領域又は制御チャネルに使用可能な第2のリソース領域において送信装置から送信された制御信号を含む受信信号を受信し、N(Nは2以上の自然数)個の送信サブフレームのそれぞれにおけるデータリソースに分配されて前記送信装置から送信された一連のデータ群を受信する受信方法であって、
前記受信信号に含まれる、前記データリソースのための割り当て制御信号を検出し、
前記割り当て制御信号が検出されたリソースブロック(RB)を含むM(Mは2以上の自然数)個のRBから構成され且つ送信サブフレーム間で共通であるリソースブロックグループ(RBG)における前記データリソースに対応するデータ成分抽出対象領域内の信号成分を前記受信信号から抽出し、
前記N個の送信サブフレームの内の第1番目の送信サブフレームにおいて前記割り当て制御信号が検出されたリソース領域は、前記第1番目の送信サブフレーム以外の送信サブフレームにおいてはデータ成分抽出対象領域とされる、
受信方法。
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