WO2012128331A1 - 通信処理方法及び基地局 - Google Patents
通信処理方法及び基地局 Download PDFInfo
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- WO2012128331A1 WO2012128331A1 PCT/JP2012/057392 JP2012057392W WO2012128331A1 WO 2012128331 A1 WO2012128331 A1 WO 2012128331A1 JP 2012057392 W JP2012057392 W JP 2012057392W WO 2012128331 A1 WO2012128331 A1 WO 2012128331A1
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- 238000004891 communication Methods 0.000 title claims description 78
- 238000003672 processing method Methods 0.000 title claims description 67
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 229920006934 PMI Polymers 0.000 claims description 68
- 230000005540 biological transmission Effects 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 26
- 230000011664 signaling Effects 0.000 claims 1
- 239000011159 matrix material Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 241001522296 Erithacus rubecula Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1881—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with schedule organisation, e.g. priority, sequence management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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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
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
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- H—ELECTRICITY
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- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
Definitions
- the present invention relates to a wireless mobile communication field, and more particularly to a cooperative multicast communication processing method in a base station and a base station.
- the antenna of the base station is a 3-sector (Sector) or 6-sector co-excited linear array (ULA, Uniform Linear Array). Located on the antenna.
- Each of the three sectors covers a range of 120 degrees, a plurality of beam antennas are arranged for each sector, these antennas have the same horizontal directivity, and all are at the center of the coverage range of the sector.
- a cell (Cell) to which the base station belongs is divided into three fixed sectors.
- RSRP reference symbol receiving power
- the user selects the sector with the strongest RSRP, that is, the sector with the largest scale and the best signal as the service sector.
- the user performs channel estimation for the channel state information of the service sector with the best channel quality, and the channel quality information is determined by the precoding matrix index (PMI, Precoding Matrix Indicator) and the channel quality information (CQI, Channel Quality Indicator).
- PMI Precoding Matrix Indicator
- CQI Channel Quality Indicator
- the channel state information of the best service sector is quantized and fed back to the base station.
- Each sector of the base station determines the priority of users in the sector by algorithms such as Proportional Fairness (PF) and Round-robin (RR), and transmits data to the user with the highest priority To do.
- PF Proportional Fairness
- RR Round-robin
- the antenna of the base station is arranged so that the cell users belong to different sectors. Since the user at the center of the sector is at the directional position of the sector antenna, a strong signal can be obtained. On the other hand, the user at the sector boundary deviates from the directional position of the sector antenna, and thus the received signal strength is weak. Users at sector boundaries can only communicate using fixed antennas. Therefore, there is a large difference in performance between users at the sector center and users at the sector boundary.
- An object of the present invention is to reduce a difference in performance between a user at a sector boundary and a user at a sector center, and to improve the throughput of a user at a cell boundary and the average throughput of a cell.
- an embodiment of the present invention provides a communication processing method used for a base station having a plurality of sectors.
- the base station receives channel state information corresponding to the spare cooperation set from each user device, and the first set includes a plurality of cooperation sets arranged in advance.
- the set is composed of two or more sectors, the spare cooperative set to which each user device corresponds is selected from the first set, and the service with the best channel quality obtained by the measurement of the user device
- the base station includes at least a sector, the base station identifies a user device set to which each cooperation set corresponds among a plurality of cooperation sets included in each cooperation set pattern, and the user device set to which the cooperation set corresponds corresponds to
- the spare cooperation set is composed of user devices including the cooperation set.
- the user station performs user scheduling for each cooperative set based on the channel state information reported by the user device in the user device set corresponding to the base station, and the base station uses the cooperative set pattern adopted by transmission based on the scheduling result of the cooperative set After the user device is specified, data transmission is performed with the specified user device based on the specified cooperative set pattern.
- the base station further obtains an index of a service sector with the best channel quality reported by each user device, and the base station transmits each channel quality to each user device.
- a spare cooperation set including the best service sector is selected from the cooperation sets arranged in advance, and issued to the user device.
- the base station issues the spare cooperative set to a user device through a higher layer.
- the PMI of the channel corresponding to each spare cooperative set is different.
- the PMI of the channel corresponding to each spare cooperative set is the same.
- an embodiment of the present invention provides a base station provided with a plurality of sectors.
- the base station receives channel state information corresponding to a spare cooperation set from each user device, and the first set includes a plurality of cooperation sets arranged in advance, and each cooperation set includes two or more cooperation sets.
- a spare cooperative set to which each user device corresponds is selected from the first set and includes at least a service module having the best channel quality of the user device,
- a user device set to which each cooperation set corresponds among a plurality of cooperation sets included in the cooperation set pattern of the user, and the user device set to which the cooperation set corresponds is a user including the cooperation set among the corresponding spare cooperation sets.
- User device set identification module composed of devices and users supported by the cooperative set Based on the channel state information reported by the user device in the device set, a scheduling module for performing user scheduling for each cooperative set, and a cooperative set pattern and user device to be used for transmission based on the scheduling result of the cooperative set
- the identified user device includes a communication processing module for performing data transmission based on the identified cooperative set pattern.
- the base station further includes a first antenna identification module for obtaining an index of a service sector with the best channel quality reported by each user device, and for each user device, A first spare cooperation set processing module for selecting each spare cooperation set including the best service sector from a pre-arranged cooperation set and issuing it to the user device.
- the spare cooperative set processing module issues the spare cooperative set to the user device through a higher layer.
- an embodiment of the present invention provides a communication processing method for performing communication between a base station having a plurality of sectors and a user device.
- each user device measures a signal quality of a signal received from each sector, and each user device identifies a service sector with the best channel quality based on the measurement result,
- the base station is notified of the index of the service sector with the best channel quality, and the base station selects a spare cooperative set for each user device from the first set, and each user device has a corresponding spare.
- the cooperation set is notified to a corresponding user device, and the first set includes a plurality of cooperation sets that are arranged in advance.
- Each cooperation set is composed of two or more sectors, and each user device has The corresponding spare collaborative set selects the service sector with the best channel quality for the user device.
- the base station receives channel state information corresponding to the spare cooperative set from each user device, and the base station corresponds to each cooperative set among a plurality of cooperative sets included in each cooperative set pattern.
- the user device set that identifies the user device set and that the cooperation set corresponds to is configured from user devices that include the cooperation set among the corresponding spare cooperation sets, and the base station includes the user device set to which the cooperation set corresponds.
- user scheduling is performed for each cooperative set, and the base station identifies the cooperative set pattern and user device to be used for transmission based on the scheduling result of the cooperative set.
- the identified user device and the identified collaborative collection Data transmission is performed based on the pattern.
- an embodiment of the present invention provides a communication processing method for performing communication between a base station having a plurality of sectors and a user device.
- each user device measures a signal quality of a signal received from each sector, and each user device identifies a service sector with the best channel quality based on the measurement result,
- Each user device selects a spare cooperation set for the user device from a first set stored in advance, and the first set includes a plurality of cooperation sets arranged in advance.
- the set is composed of two or more sectors, and the spare cooperation set to which each user device corresponds includes at least the service sector with the best channel quality of the user device, and the base station corresponds to the spare cooperation set from each user device.
- the base station is included in each cooperative set pattern A user device set to which each cooperation set corresponds among a number of cooperation sets, and the user device set to which the cooperation set corresponds includes user devices including the cooperation set among the corresponding spare cooperation sets.
- the base station performs user scheduling for each cooperative set based on the channel state information reported by the user device in the user device set corresponding to the cooperative set, and the base station transmits based on the scheduling result of the cooperative set. After the cooperative set pattern and user device to be adopted are specified, data transmission is performed with the specified user device based on the specified cooperative set pattern.
- Embodiments of the present invention have the following beneficial effects.
- a cooperation set is immediately assigned to a user device based on a measurement result of the signal quality of the user device, and communication processing is performed based on the immediately assigned cooperation set.
- the user device does not communicate using a fixed antenna of a fixed sector, but selects a plurality of sector antennas based on the measured communication quality of the antenna to form a cooperative set, and the sectors in the cooperative set It communicates using.
- a cooperation set is immediately allocated to a user device based on a measurement result of the signal quality of the user device, and communication processing is performed based on the immediately allocated cooperation set. Accordingly, it is possible to reduce the difference in performance between the users at the sector boundary and the users at the sector center, and it is possible to improve the throughput of the users at the cell boundary and the average throughput of the cell by 5%.
- a base station having 12 sectors is taken as an example.
- 12 sectors are indicated by the physical sector index
- 12 sectors are indicated by the antenna index.
- the arrangement positions of the 12 sectors are shown in FIG.
- the base station provides a plurality of sectors in a circular manner.
- the communication processing method according to the first embodiment of the present invention includes the following steps. Step 41 Each user device measures the signal quality of the signal received from each sector.
- Step 42 Each user device identifies the service sector with the best channel quality based on the measurement result, and notifies the base station of the physical sector index (Physical cell index, PCI) of each service sector (Serving Cell).
- PCI Physical cell index
- Step 43 For each user device, the base station selects a spare cooperation set including the service sector with the best channel quality from the first set, and each user device corresponds to the corresponding spare cooperation set.
- the user device is notified, and the first set includes a plurality of cooperation sets arranged in advance, and each cooperation set is composed of two or more sectors.
- Step 44 Each user device feeds back channel state information corresponding to all or some of the corresponding spare cooperative sets to the base station.
- Step 45 The base station identifies a user device set corresponding to each cooperation set among a plurality of cooperation sets included in each cooperation set pattern, and each cooperation set is composed of two or more sectors. Each of the plurality of sectors belongs to one cooperation set and only belongs to the cooperation set.
- the user device set to which the cooperation set corresponds is composed of user devices including the cooperation set among the corresponding spare cooperation sets.
- Step 46 The base station performs user scheduling for each cooperative set based on the channel state information reported by the user device in the user device set corresponding to the cooperative set.
- Step 47 After identifying the cooperative set pattern and user device to be used for transmission based on the scheduling result of the cooperative set, data transmission is performed.
- the sector can have one antenna and can be composed of a plurality of antennas.
- the user device set to which the cooperation set corresponds is composed of user devices including the cooperation set among the corresponding spare cooperation sets.”
- the cooperation set A includes a user device set B including a plurality of user devices A1, and the spare cooperation set corresponding to each user device A1 includes the cooperation set A.
- Step A1 The base station acquires the physical sector index (PCI) of the service sector with the best channel quality reported by each user device.
- PCI physical sector index
- Step A2 The base station selects, for each user device, a spare cooperation set including the service sector with the best channel quality from the first set, and each user device corresponds to a corresponding spare cooperation set.
- the first set includes a plurality of cooperative sets arranged in advance, and each cooperative set is composed of two or more sectors.
- Step A3 The base station receives from each user device channel state information corresponding to all or some of the spare cooperative sets of the user device.
- Step A4 The base station identifies a user device set to which each cooperation set corresponds among a plurality of cooperation sets included in each cooperation set pattern, and each cooperation set is composed of two or more sectors. Each of the plurality of sectors belongs to one cooperation set and only belongs to the cooperation set.
- the user device set to which the cooperation set corresponds is composed of user devices including the cooperation set among the corresponding spare cooperation sets.
- Step A5 The base station performs user scheduling for each cooperative set based on the channel state information reported by the user device in the user device set corresponding to the cooperative set.
- Step A6 The base station specifies the cooperative set pattern and user device to be used for transmission based on the scheduling result of the cooperative set, and then performs data transmission with the specified user device based on the specified cooperative set pattern.
- the channel quality of the service sector is one of large scale channel quality, instantaneous channel quality, and long-term statistical average channel quality.
- the method of the first embodiment of the present invention will be described by way of example.
- the number of base station sectors is N
- the number of cooperative set sectors in the first set is K
- K 1,..., N
- the first set is as follows.
- l is the first sector index of the cooperation set. If the physical sector index of the service sector with the best channel quality of a user is M, the spare cooperative set of the user is all cooperative sets including the index M.
- the spare cooperative set to which the user corresponds is shown in the following table.
- the number of antennas included in the spare cooperative set is 4, and if there is one antenna for each sector.
- the first set can be simply shown in the following table.
- the spare cooperative set of the user is as shown in the following table.
- the base station needs to issue a spare cooperation set to the user device, where a higher layer (a radio resource control layer, a radio link control layer, a packet data convergence protocol layer, or It is possible to issue a spare cooperative set to the user side by a media access control layer or the like.
- a higher layer a radio resource control layer, a radio link control layer, a packet data convergence protocol layer, or It is possible to issue a spare cooperative set to the user side by a media access control layer or the like.
- the spare cooperation set it is possible to notify the spare cooperation set to the user device by the following data format.
- Two fields are included: a spare cooperation set ID field and a sector ID field, where the spare cooperation set ID field indicates the number of all possible sets of spare cooperation sets for reporting, and the sector ID field is a spare cooperation set. Indicates the sectors included in the set.
- the base station may notify the user device of the sector ID included in the spare cooperative set.
- the data to be transmitted is as follows. 1 1 2 3 4 2 2 3 4 5 3 3 4 5 6 4 4 5 6 7
- each user device After the user acquires the spare cooperation set, each user device needs to feed back to the base station channel state information corresponding to all or some of the corresponding spare cooperation sets.
- the communication processing method includes the following steps. Step 51 Each user device measures the channel quality received from each sector.
- Step 52 Each user device identifies the service sector with the best channel quality based on the measurement result.
- Step 53 Each user device selects a spare cooperative set including the service sector with the best channel quality from the first set stored in advance, and is arranged in the first set in advance.
- a plurality of cooperation sets are included, and each cooperation set is composed of two or more sectors.
- Step 54 Each user device feeds back to the base station channel state information corresponding to all or some of the corresponding spare cooperative sets.
- Step 55 The base station identifies a user device set to which each cooperation set corresponds among a plurality of cooperation sets included in each cooperation set pattern, and each cooperation set is composed of two or more sectors. In any one of the cooperative set patterns, each of the plurality of sectors belongs to one cooperative set and belongs only to the cooperative set.
- the user device set to which the cooperation set corresponds is composed of user devices including the cooperation set among the corresponding spare cooperation sets.
- Step 56 The base station performs user scheduling for each cooperative set based on the channel state information reported by the user device in the user device set corresponding to the cooperative set.
- Step 57 The base station performs data transmission after identifying the cooperative set pattern and user device to be used for transmission based on the scheduling result of the cooperative set.
- the communication processing method includes the following steps as viewed from the base station side.
- Step B1 The base station receives from each user device channel state information corresponding to some or all of the spare cooperating sets of the user device.
- the spare cooperative set of the user device is a spare cooperative set including a service sector with the best channel quality among the first set stored in advance by the user device.
- the first set includes a plurality of cooperative sets arranged in advance, and each cooperative set is composed of two or more sectors.
- Step B2 The base station identifies a user device set to which each cooperation set corresponds among a plurality of cooperation sets included in each cooperation set pattern, and each cooperation set is composed of two or more sectors.
- each of the plurality of sectors belongs to one cooperative set and belongs only to the cooperative set.
- the user device set to which the cooperation set corresponds is composed of user devices including the cooperation set among the corresponding spare cooperation sets.
- Step B3 The base station performs user scheduling for each cooperative set based on the channel state information reported by the user device in the user device set corresponding to the cooperative set.
- Step B4 The base station specifies the cooperative set pattern and user device to be used for transmission based on the scheduling result of the cooperative set, and then performs data transmission with the specified user device based on the specified cooperative set pattern.
- the difference between the second embodiment and the first embodiment is as follows. That is, in the first embodiment, for the user device, it is necessary for the base station to select a spare cooperation set, whereas in the second embodiment, the user device itself is stored in advance on the user device side. Select a spare cooperation set from the set. Further, in the second embodiment, it is necessary to synchronize the first set between the base station and the user device, whereas in the first embodiment, the base station and the user device Without the need to synchronize the first set between, the base station selects a spare cooperative set for the user based on the measurement result reported by the user device and issues it to the user device.
- synchronization of the first set between the base station and the user device can be realized by various methods. I will explain as follows.
- Method 1 The base station notifies all possible cooperating sets directly to the user device. If there are 12 sectors and there are 4 sectors for each cooperation set, the base station may directly notify the user device of the IDs of the following 12 cooperation sets and their combinations. ⁇ 0,1,2,3 ⁇ , ⁇ 1,2,3,4 ⁇ , ⁇ 2,3,4,5 ⁇ , ..., ⁇ 11,0,1,2 ⁇ .
- the user device feeds back the channel state information corresponding to each spare cooperative set to the base station, the user device reports the channel state information corresponding to which spare cooperative set only by having the ID of the cooperative set at the same time.
- the base station knows what happened.
- Method 2 The base station broadcasts M and N to the user device.
- M is the number of sectors in the base station, and N is the number of sectors in the cooperation set.
- the user device obtains possible cooperation sets based on M and N.
- the base station need only transmit 12 and 4 to the user. Then, the user device can acquire the next cooperative set, that is, the corresponding combination ID based on 12 and 4, and can realize synchronization between the base station and the user device. ⁇ 0,1,2,3 ⁇ , ⁇ 1,2,3,4 ⁇ , ⁇ 2,3,4,5 ⁇ , ..., ⁇ 11,0,1,2 ⁇ .
- the user device When the channel state information is fed back, the user device only has the ID of the spare cooperation set at the same time, and the base station can know which spare cooperation set the user device has reported the corresponding channel state information.
- the channel state information relates to a communication method between the user device and the base station.
- a precoding matrix index PMI, Precoding Matrix Indicator
- CQI Channel Quality Indicator
- transmission is performed using the precoding method. If not, it is sufficient to feed back only the CQI.
- PMI Precoding Matrix Indicator
- CQI Channel Quality Indicator
- the user device can obtain the data shown in the following table.
- the above method feeds back PMI and CQI for each spare cooperation set.
- the PMI that is fed back is similar or different
- the CQI can be similar or different.
- some spare cooperation sets are selected from the spare cooperation sets, and the largest CQI of any one selected spare cooperation set is selected from any one of the selected spare cooperation sets. Equal to or greater than the largest CQI. Then, the largest CQI and the corresponding PMI of the largest CQI are fed back for each selected spare cooperation set.
- some spare cooperation sets are selected from the spare cooperation sets, and the largest CQI of any one selected spare cooperation set is selected from any one of the spare cooperation sets not selected. Equal to or greater than the largest CQI.
- the same PMI is fed back for each selected spare cooperation set, and the sum of CQIs of all selected spare cooperation sets corresponding to the PMI is the largest. Further, the same CQI is fed back for each selected spare cooperation set, and the CQI is the maximum value of the CQIs corresponding to the fed back PMI of all the selected spare cooperation sets, Minimum or average value.
- the first embodiment and the second embodiment of the present invention have their respective merits.
- the flow of the second embodiment is relatively simple, it is necessary to synchronize relatively large antenna set information between the base station and the user device.
- the base station first identifies the user device set to which each cooperation set corresponds among the plurality of cooperation sets included in each cooperation set pattern, and Based on the channel state information reported by the user device, user scheduling is performed for each cooperative set.
- user scheduling is performed for each cooperative set.
- the cooperation set pattern is a plurality of cooperation sets that do not overlap with each other, and includes a plurality of sectors in the cell of the cooperation multicast within the user cell.
- Cooperation set pattern 1 Cooperation set X1 corresponding to sectors 1, 2, 3, 4 Cooperation set X2 corresponding to sectors 5, 6, 7 and 8 Cooperation set X3 corresponding to sectors 9, 10, 11, 0
- Cooperation set pattern 2 Cooperation set Y1 corresponding to sectors 2, 3, 4, 5 Cooperation set Y2 corresponding to sectors 6, 7, 8, 9 Cooperation set Y3 corresponding to sectors 10, 11, 0, 1
- Cooperation set pattern 3 Cooperation set Z1 corresponding to sectors 3, 4, 5, 6 Cooperation set Z2 corresponding to sectors 7, 8, 9, 10 Cooperation set Z3 corresponding to sectors 11, 0, 1, 2
- Cooperation set pattern 4 Cooperation set W1 corresponding to sectors 4, 5, 6, and 7 Cooperation set W2 corresponding to sectors 8, 9, 10, and 11 Cooperation set W3 corresponding to sectors 0, 1, 2, 3
- each cooperative set pattern includes three cooperative sets, and each cooperative set is composed of four sectors.
- each of the plurality of sectors is 1 Belongs to one cooperative set and only belongs to the cooperative set.
- the cooperation state is included in the channel state information to which all or some spare cooperation sets fed back by the user device correspond. It is only necessary to consider whether or not. If included, the user device belongs to the user device set to which the cooperative set corresponds, otherwise it does not belong.
- the user device A corresponds to the user device set corresponding to the cooperation set X1. Otherwise, device A does not belong to the user device set to which cooperative set X1 corresponds.
- user scheduling can be performed based on the channel state information reported by the user device. For example, when scheduling is performed by an algorithm such as proportional fairness or round robin, one or a plurality of users can be scheduled for each cooperative set of each cooperative set pattern. The priority of each cooperation set pattern can be calculated by a scheduled user of each cooperation set of the cooperation set pattern.
- the data transmission may be performed by selecting the cooperation set pattern with the highest priority and the user device scheduled for each cooperation set in the cooperation set pattern.
- the present invention improves the average throughput of the system by further designing the user-side feedback and base-station-side scheduling method of cooperative multicast in the base station, and further improves the sector-boundary user throughput. It is possible to reduce the difference in performance between the user and the sector-centered user.
- An embodiment of the present invention provides a base station having a plurality of sectors.
- the base station includes a receiving module for receiving channel state information corresponding to a spare cooperative set from each user device, and a user device set corresponding to each cooperative set among a plurality of cooperative sets included in each cooperative set pattern.
- the user device set corresponding to the cooperation set is a user device set specifying module composed of user devices including the cooperation set among the corresponding spare cooperation sets, and the user device in the user device set corresponding to the cooperation set.
- the scheduling module for performing user scheduling for each cooperative set, and the cooperative set pattern and user device to be used for transmission based on the scheduling result of the cooperative set are identified and specified.
- the Zadebaisu including a communication processing module for performing data transmission based on cooperation set pattern identified.
- the base station further obtains the physical sector index (PCI) of the service sector with the best channel quality reported by each user device.
- PCI physical sector index
- a spare cooperation set including at least a service sector with the best channel quality is selected from a pre-arranged cooperation set and issued to the user device.
- the spare cooperation set processing module issues the spare cooperation set to the user device through a higher layer.
- the PMI of the channel corresponding to each spare cooperative set is different.
- the PMI of the channel corresponding to each spare cooperative set is the same.
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Abstract
Description
本発明の具体的実施例における通信処理方法及び基地局において、ユーザデバイスの信号品質の測定結果によりユーザデバイスに協力集合を即時に割り当て、即時に割り当てられた協力集合に基づいて通信処理を行う。ユーザデバイスは、固定のセクタの固定アンテナを利用して通信するのではなく、測定されたアンテナの通信品質に基づいて複数のセクタのアンテナを選択して協力集合を構成し、協力集合中のセクタを利用して通信するのである。これにより、ユーザデバイスが通信品質のよいアンテナを利用して通信することを確保でき、セクタ境界のユーザとセクタ中心のユーザとの性能上の差異を減縮させることが可能であるとともに、システムのスループットを向上させることも可能である。
ステップ41 それぞれのユーザデバイスは、各々のセクタから受信した信号の信号品質をそれぞれ測定する。
仮に基地局のセクタの数をN、第1の集合における協力集合のセクタの数をK、K=1,…,Nとすると、第1の集合は次のとおりである。
1 1 2 3 4 2 2 3 4 5 3 3 4 5 6 4 4 5 6 7
ステップ51 それぞれのユーザデバイスは、各々のセクタから受信したチャネル品質をそれぞれ測定する。
ステップB1 基地局は、それぞれのユーザデバイスからユーザデバイスの一部または全てのスペア協力集合が対応するチャネル状態情報を受信する。
基地局は、全ての可能な協力集合を直接ユーザデバイスに通知する。仮に12のセクタがあり、協力集合毎に4つのセクタがあるとすると、基地局は次のような12の協力集合及びその組合せのIDを直接ユーザデバイスに通知すればよい。
{0,1,2,3},{1,2,3,4}, {2,3,4,5},…, {11,0,1,2}。
基地局は、MとNをユーザデバイスに放送する。Mは当該基地局のセクタの数であり、Nは協力集合のセクタの数である。ユーザデバイスが、M及びNに基づいて可能な協力集合を獲得する。
{0,1,2,3},{1,2,3,4}, {2,3,4,5},…, {11,0,1,2}。
協力集合パターン1:
セクタ1、2、3、4に対応する協力集合X1
セクタ5、6、7、8に対応する協力集合X2
セクタ9、10、11、0に対応する協力集合X3
セクタ2、3、4、5に対応する協力集合Y1
セクタ6、7、8、9に対応する協力集合Y2
セクタ10、11、0、1に対応する協力集合Y3
セクタ3、4、5、6に対応する協力集合Z1
セクタ7、8、9、10に対応する協力集合Z2
セクタ11、0、1、2に対応する協力集合Z3
セクタ4、5、6、7に対応する協力集合W1
セクタ8、9、10、11に対応する協力集合W2
セクタ0、1、2、3に対応する協力集合W3
前記基地局は、それぞれのユーザデバイスからスペア協力集合が対応するチャネル状態情報を受信する受信モジュールと、それぞれの協力集合パターンに含まれる複数の協力集合のうちそれぞれの協力集合が対応するユーザデバイス集合を特定し、前記協力集合が対応するユーザデバイス集合は対応するスペア協力集合のうち前記協力集合を含むユーザデバイスから構成されるユーザデバイス集合特定モジュールと、協力集合が対応するユーザデバイス集合におけるユーザデバイスが報告したチャネル状態情報に基づき、それぞれの協力集合に対してユーザスケジューリングを行うためのスケジューリングモジュールと、協力集合のスケジューリング結果に基づいて伝送の採用する協力集合パターン及びユーザデバイスを特定し、特定されたユーザデバイスとは特定された協力集合パターンに基づいてデータ伝送を行うための通信処理モジュールと、を含む。
Claims (36)
- 基地局に用いられる通信処理方法であって、前記基地局は複数のセクタを備え、前記通信処理方法において、
基地局は、それぞれのユーザデバイスから一部または全てのスペア協力集合が対応するチャネル状態情報を受信し、第1の集合には予め配置されている複数の協力集合が含まれ、それぞれの協力集合は2つ以上のセクタから構成され、それぞれのユーザデバイスが対応するスペア協力集合が、第1の集合から選ばれたものであり、かつ、ユーザデバイスの測定によって得られるチャネル品質の最もよいサービスセクタを少なくとも含み、
基地局は、それぞれの協力集合パターンに含まれる複数の協力集合のうちそれぞれの協力集合が対応するユーザデバイス集合を特定し、前記協力集合が対応するユーザデバイス集合は、対応するスペア協力集合のうち前記協力集合を含むユーザデバイスから構成されており、
基地局は、協力集合が対応するユーザデバイス集合におけるユーザデバイスが報告したチャネル状態情報に基づき、それぞれの協力集合に対してユーザスケジューリングを行い、
基地局は、協力集合のスケジューリング結果に基づいて伝送の採用する協力集合パターン及びユーザデバイスを特定した後に、特定されたユーザデバイスとは特定された協力集合パターンに基づいてデータ伝送を行う、ことを特徴とする通信処理方法。 - 請求項1に記載の通信処理方法であって、さらに、
基地局は、それぞれのユーザデバイスが各々報告した前記サービスセクタのインデックスを獲得し、
基地局は、それぞれのユーザデバイスに対して、各々の前記サービスセクタを含むスペア協力集合を予め配置されている協力集合からそれぞれ選択して、ユーザデバイスへ発行することを特徴とする通信処理方法。 - 請求項2に記載の通信処理方法であって、
複数のセクタの物理セクタインデックスが異なる場合、前記サービスセクタのインデックスは物理セクタインデックスにより指示され、複数のセクタの物理セクタインデックスが同様である場合、前記サービスセクタのインデックスはアンテナインデックスにより指示されることを特徴とする通信処理方法。 - 請求項2に記載の通信処理方法であって、
前記基地局は、前記スペア協力集合を高レイヤによってユーザデバイスへ発行することを特徴とする通信処理方法。 - 請求項1に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告した全てのスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする通信処理方法。 - 請求項1に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告したスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、ユーザデバイスが報告したPMIは、全てのPMIのうち、対応する全てのスペア協力集合が対応するCQIの総和が最も大きいPMIであることを特徴とする通信処理方法。 - 請求項1に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における一部のスペア協力集合が対応するチャネル状態情報を受信し、その一部のスペア協力集合のうち何れか一つの最も大きいCQIは、その他のスペア協力集合のうち何れか一つの最も大きいCQIより等しいか大きいことを特徴とする通信処理方法。 - 請求項7に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする通信処理方法。 - 請求項8に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、当該PMIは前記一部のスペア協力集合のCQIの総和を最も大きくさせるPMIであることを特徴とする通信処理方法。 - 請求項9に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのCQIは同様であり、当該CQIはフィードバックされたPMIに対応するCQIのうちの最大値、最小値または平均値であることを特徴とする通信処理方法。 - 複数のセクタが設けられている基地局であって、
それぞれのユーザデバイスから全てまたは一部のスペア協力集合が対応するチャネル状態情報を受信し、第1の集合には予め配置されている複数の協力集合が含まれ、それぞれの協力集合は2つ以上のセクタから構成され、それぞれのユーザデバイスが対応するスペア協力集合が、第1の集合から選ばれたものであり、かつ、ユーザデバイスの測定によって得られるチャネル品質の最もよいサービスセクタを少なくとも含む受信モジュールと、
それぞれの協力集合パターンに含まれる複数の協力集合のうちそれぞれの協力集合が対応するユーザデバイス集合を特定し、前記協力集合が対応するユーザデバイス集合は対応するスペア協力集合のうち前記協力集合を含むユーザデバイスから構成されるユーザデバイス集合特定モジュールと、
協力集合が対応するユーザデバイス集合におけるユーザデバイスが報告したチャネル状態情報に基づき、それぞれの協力集合に対してユーザスケジューリングを行うためのスケジューリングモジュールと、
協力集合のスケジューリング結果に基づいて伝送の採用する協力集合パターン及びユーザデバイスを特定し、特定されたユーザデバイスとは特定された協力集合パターンに基づいてデータ伝送を行うための通信処理モジュールと、を含むことを特徴とする基地局。 - 請求項11に記載の基地局であって、さらに、
それぞれのユーザデバイスが各々報告した前記サービスセクタのインデックスを獲得するための第1のアンテナ特定モジュールと、
それぞれのユーザデバイスに対して、各々の前記サービスセクタを含むスペア協力集合を予め配置されている協力集合からそれぞれ選択して、ユーザデバイスへ発行するための第1のスペア協力集合処理モジュールと、を含むことを特徴とする基地局。 - 請求項11に記載の基地局であって、
複数のセクタの物理セクタインデックスが異なる場合、前記サービスセクタのインデックスは物理セクタインデックスにより指示され、複数のセクタの物理セクタインデックスが同様である場合、前記サービスセクタのインデックスはアンテナインデックスにより指示されることを特徴とする基地局。 - 請求項12に記載の基地局であって、
前記スペア協力集合処理モジュールは、前記スペア協力集合を高レイヤによってユーザデバイスへ発行することを特徴とする基地局。 - 請求項11に記載の基地局であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告した全てのスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする基地局。 - 請求項11に記載の基地局であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告したスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、ユーザデバイスが報告したPMIは、全てのPMIのうち、対応する全てのスペア協力集合が対応するCQIの総和が最も大きいPMIであることを特徴とする基地局。 - 請求項11に記載の基地局であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における一部のスペア協力集合が対応するチャネル状態情報を受信し、その一部のスペア協力集合のうち何れか一つの最も大きいCQIは、その他のスペア協力集合のうち何れか一つの最も大きいCQIより等しいか大きいことを特徴とする基地局。 - 請求項17に記載の基地局であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする基地局。 - 請求項17に記載の基地局であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、当該PMIは前記一部のスペア協力集合のCQIの総和を最も大きくさせるPMIであることを特徴とする基地局。 - 請求項19に記載の基地局であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのCQIは同様であり、当該CQIはフィードバックされたPMIに対応するCQIのうちの最大値、最小値または平均値であることを特徴とする基地局。 - 基地局とユーザデバイスとの間で通信を行うための通信処理方法であって、前記基地局は複数のセクタを備え、前記通信処理方法において、
それぞれのユーザデバイスは、各々のセクタから受信した信号の信号品質をそれぞれ測定し、
それぞれのユーザデバイスは、測定の結果に基づいてチャネル品質の最もよいサービスセクタを特定し、各前記サービスセクタのインデックスを基地局に通知し、
基地局はそれぞれのユーザデバイスに対して、スペア協力集合を第1の集合からそれぞれ選択し、各ユーザデバイスがそれぞれ対応するスペア協力集合を対応するユーザデバイスに通知し、前記第1の集合には予め配置されている複数の協力集合が含まれ、それぞれの協力集合は2つ以上のセクタから構成され、それぞれのユーザデバイスが対応するスペア協力集合が、ユーザデバイスの前記サービスセクタを少なくとも含み、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てまたは一部のスペア協力集合が対応するチャネル状態情報を受信し、
基地局は、それぞれの協力集合パターンに含まれる複数の協力集合のうちそれぞれの協力集合が対応するユーザデバイス集合を特定し、前記協力集合が対応するユーザデバイス集合は、対応するスペア協力集合のうち前記協力集合を含むユーザデバイスから構成されており、
基地局は、協力集合が対応するユーザデバイス集合におけるユーザデバイスが報告したチャネル状態情報に基づき、それぞれの協力集合に対してユーザスケジューリングを行い、
基地局は、協力集合のスケジューリング結果に基づいて伝送の採用する協力集合パターン及びユーザデバイスを特定した後に、特定されたユーザデバイスとは特定された協力集合パターンに基づいてデータ伝送を行う、ことを特徴とする通信処理方法。 - 請求項21に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告した全てのスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする通信処理方法。 - 請求項21に記載の通信処理方法であって、
複数のセクタの物理セクタインデックスが異なる場合、前記サービスセクタのインデックスは物理セクタインデックスにより指示され、複数のセクタの物理セクタインデックスが同様である場合、前記サービスセクタのインデックスはアンテナインデックスにより指示されることを特徴とする通信処理方法。 - 請求項21に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告したスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、ユーザデバイスが報告したPMIは、全てのPMIのうち、対応する全てのスペア協力集合が対応するCQIの総和が最も大きいPMIであることを特徴とする通信処理方法。 - 請求項21に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における一部のスペア協力集合が対応するチャネル状態情報を受信し、その一部のスペア協力集合のうち何れか一つの最も大きいCQIは、その他のスペア協力集合のうち何れか一つの最も大きいCQIより等しいか大きいことを特徴とする通信処理方法。 - 請求項25に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする通信処理方法。 - 請求項25に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、当該PMIは前記一部のスペア協力集合のCQIの総和を最も大きくさせるPMIであることを特徴とする通信処理方法。 - 請求項27に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのCQIは同様であり、当該CQIはフィードバックされたPMIに対応するCQIのうちの最大値、最小値または平均値であることを特徴とする通信処理方法。 - 基地局とユーザデバイスとの間で通信を行うための通信処理方法であって、前記基地局は複数のセクタを備え、前記通信処理方法において、
基地局は、高レイヤシグナリングによって、協力集合に含まれるセクタ数及びフィードバック必要な協力集合数をそれぞれのユーザデバイスに通知し、
それぞれのユーザデバイスは、各々のセクタから受信した信号の信号品質をそれぞれ測定し、
それぞれのユーザデバイスは、測定の結果に基づいてチャネル品質の最もよいサービスセクタを特定し、
それぞれのユーザデバイスは自身に対して、予め保存されている第1の集合からスペア協力集合を選択し、前記第1の集合には予め配置されている複数の協力集合が含まれ、それぞれの協力集合は2つ以上のセクタから構成され、それぞれのユーザデバイスが対応するスペア協力集合が、ユーザデバイスの前記サービスセクタを少なくとも含み、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てまたは一部のスペア協力集合が対応するチャネル状態情報を受信し、
基地局は、それぞれの協力集合パターンに含まれる複数の協力集合のうちそれぞれの協力集合が対応するユーザデバイス集合を特定し、前記協力集合が対応するユーザデバイス集合は、対応するスペア協力集合のうち前記協力集合を含むユーザデバイスから構成されており、
基地局は、協力集合が対応するユーザデバイス集合におけるユーザデバイスが報告したチャネル状態情報に基づき、それぞれの協力集合に対してユーザスケジューリングを行い、
基地局は、協力集合のスケジューリング結果に基づいて伝送の採用する協力集合パターン及びユーザデバイスを特定した後に、特定されたユーザデバイスとは特定された協力集合パターンに基づいてデータ伝送を行う、ことを特徴とする通信処理方法。 - 請求項29に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告した全てのスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする通信処理方法。 - 請求項29に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における全てのスペア協力集合が対応するチャネル状態情報を受信し、前記ユーザデバイスが報告したスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、ユーザデバイスが報告したPMIは、全てのPMIのうち、対応する全てのスペア協力集合が対応するCQIの総和が最も大きいPMIであることを特徴とする通信処理方法。 - 請求項29に記載の通信処理方法であって、
複数のセクタの物理セクタインデックスが異なる場合、前記サービスセクタのインデックスは物理セクタインデックスにより指示され、複数のセクタの物理セクタインデックスが同様である場合、前記サービスセクタのインデックスはアンテナインデックスにより指示されることを特徴とする通信処理方法。 - 請求項31に記載の通信処理方法であって、
基地局はそれぞれのユーザデバイスからスペア協力集合における一部のスペア協力集合が対応するチャネル状態情報を受信し、その一部のスペア協力集合のうち何れか一つの最も大きいCQIは、その他のスペア協力集合のうち何れか一つの最も大きいCQIより等しいか大きいことを特徴とする通信処理方法。 - 請求項33に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは、当該スペア協力集合の最も大きいCQIに対応するPMIであることを特徴とする通信処理方法。 - 請求項33に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのPMIは同様であり、当該PMIは前記一部のスペア協力集合のCQIの総和を最も大きくさせるPMIであることを特徴とする通信処理方法。 - 請求項35に記載の通信処理方法であって、
前記一部のスペア協力集合が対応するチャネル状態情報のうち、それぞれのスペア協力集合が対応するチャネルのCQIは同様であり、当該CQIはフィードバックされたPMIに対応するCQIのうちの最大値、最小値または平均値であることを特徴とする通信処理方法。
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