CN101888665A - Local scheduler-based multi-point cooperative transmission method - Google Patents

Local scheduler-based multi-point cooperative transmission method Download PDF

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CN101888665A
CN101888665A CN2009100839650A CN200910083965A CN101888665A CN 101888665 A CN101888665 A CN 101888665A CN 2009100839650 A CN2009100839650 A CN 2009100839650A CN 200910083965 A CN200910083965 A CN 200910083965A CN 101888665 A CN101888665 A CN 101888665A
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district
cqi
pmi
wave beam
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CN101888665B (en
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路杨
王立江
潘瑜
张莉莉
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Potevio Institute of Technology Co Ltd
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Abstract

The invention discloses a local scheduler-based multi-point cooperative transmission method, which comprises that: CoMP UE selects K cells from neighboring cells of a local cell as measurement cells and reports the channel state information (CSI) of the local cell and the measurement cells to the base station of the local cell according to MIMO modes and a CoMP types, which are supported by the local cell; the base station of the local cell performs UE scheduling and resource distribution according to the MIMO modes and CoMP types, which are supported by the local cell, and transmits the resources distributed to UE, the MIMO modes and CoMP types, which are supported by the local cell, as well as corresponding resources and CQI difference values, which are recommended to the corresponding measurement cells on the time-frequency resource occupied by the UE, to the cooperative cells; the measurement cells determine if to provide CoMP services and the CoMP types for the UE according to a cooperation message, wherein the measurement cells which provide CoMP services for the UE are cooperative cells; and the local cell and the cooperative cells transmit data for the UE according to the CoMP types.

Description

A kind of multi-point cooperative transmission method based on local scheduler
Technical field
The present invention relates to multi-point cooperative transmission (CoMP) technology, particularly a kind of multi-point cooperative transmission method based on local scheduler.
Background technology
In the LTE-A system, introduce the CoMP technology and realize the interference coordination of minizone, guarantee user's data rate and performance, this transmission plan provides service manner to the user jointly by a plurality of sub-districts, improves the user's communications quality.
MIMO is the general name of the many antenna transmission of system configuration or many antennas reception technique, existing 3 class MIMO technology, SU-MIMO (Single User MIMO), MU-MIMO (multiuser MIMO) and CoMP-MIMO (multi-point cooperative MIMO is also referred to as network MIMO) are used to improve user rate, throughput of system and Cell Edge User communication quality.When single subdistrict base station services unique user, be called SU-MIMO; When a plurality of user of single subdistrict base station services, be called MU-MIMO; When unique user is served simultaneously in the base station of a plurality of sub-districts, be called CoMP-SU-MIMO; When a plurality of user is served simultaneously in the base station of a plurality of sub-districts, be called CoMP-MU-MIMO.
3GPP defines two class multi-point cooperative transmission modes at present:
(1) inter-cell united scheduling/beam shaping
Combined dispatching is the upgrading of the dynamic interference coordination method of LTE system, the base station sends the employed running time-frequency resource of edge customer to neighbor cell, make neighbor cell avoid using these resources, when the neighbor cell load is overweight when having to use these resources, then reduce interference to edge customer by power control; The united beam excipient is to utilize the intelligent antenna beam excipient, or the MIMO precoding technique disturbs with the processing mode reduction of " the empty branch " the identical running time-frequency resource of neighbor cell, as shown in Figure 1, BS1 serves single user with BS2 on identical running time-frequency resource, simultaneously BS1 utilizes the beam shaping technology to avoid co-channel interference to MS2.In the time of inter-cell united beam shaping, can provide MU-MIMO or the service of multi-flow beam excipient for this sub-district by MIMO precoding technique or intelligent antenna technology, promptly on same asset, serve 2 above users simultaneously in empty divisional processing mode, as shown in Figure 2, BS2 serves MS2 and MS3 simultaneously, and BS1 serves MS1 and avoids co-channel interference to MS2 simultaneously on identical running time-frequency resource.Compare the wave beam situation that in addition schedule information that not only needs mutual edge customer between the sub-district also has the edge customer use with combined dispatching.This cooperative mode remains a terminal and provides data transport service by a sub-district, but since need be between the sub-district interactive space information, increased the burden of the wired carrying in minizone.
(2) inter-cell united transmission
Different with inter-cell united scheduling/beam shaping, inter-cell united transmission is that many sub-districts provide service to the user simultaneously on same asset, has therefore avoided the interference of neighbor cell to this Cell Edge User.Because send data to the user during multiple sectors at same, user's data need be shared between the sub-district.General, CoMP-SU-MIMO is provided mode, promptly a base station can only be served a user simultaneously, this base station can be and this user of other base stations united services that as shown in Figure 3, BS1 and BS2 only serve MS2, only to the MS1 service, BS1 and BS2 have realized the joint transmission to MS2 to BS; If introducing spatial reuse, system can also be under the CoMP-MU-MIMO mode service-user, be that the base station can be served a plurality of users simultaneously, this base station can with these users of other base stations united services, as shown in Figure 4, the MU-MIMO mode is all adopted in 3 base stations, and BS1 and BS2 provide joint transmission to MS2, BS2 and BS3 provide joint transmission to MS3, and BS1 and BS3 provide joint transmission to MS1.Under the CoMP-SU-MIMO mode, the base station sends the employed running time-frequency resource of edge customer to neighbor cell, makes neighbor cell avoid user with this resource service oneself, and is used for the federated service edge customer; Under the CoMP-MU-MIMO mode, also to send spatial information (si) except sending the running time-frequency resource information to neighbor cell, make neighbor cell empty this user of running time-frequency resource federated service with edge customer, avoid producing and conflict with the user who oneself serves.Compare with inter-cell united scheduling/beam shaping, inter-cell united transmission also needs minizone carrying transmitting user data, and wired carrying expense is bigger.
During the collaborative transmission of many sub-districts, need mutual bulk information between the base station.Particularly, in present CoMP transmission technology, adopt the combined dispatching mode to determine that each cooperation cell is the resource that UE distributes, before the resource that is defined as the UE distribution, need be with regard to UE in PMI that recommends cooperation cell to use on each running time-frequency resource or wave beam numbering and to use the PMI that recommends or the CQI information after the wave beam numbering etc. carry out mutual, thus make that mutual amount of information is very big between the base station.To all have higher requirements to carrying between the base station and air interface capability and time-delay alternately of bulk information.
Summary of the invention
In view of this, the invention provides a kind of multi-point cooperative transmission method, can significantly reduce the transinformation content between the base station based on local scheduler.
For achieving the above object, the present invention adopts following technical scheme:
A kind of multi-point cooperative transmission method based on local scheduler comprises:
The UE of multi-point cooperative transmission CoMP selects K sub-district as measuring the sub-district from the neighbor cell of this sub-district, and MIMO pattern and CoMP type that described UE supports according to this sub-district report this sub-district and the channel condition information CSI that measures the sub-district to the base station of this sub-district; Wherein, described K is the constant of systemic presupposition;
The base station of described this sub-district, MIMO pattern and CoMP type according to this sub-district support, carry out scheduling and the resource allocation of described UE, and take corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource to each described measurement cell transmission is the described UE resource of distributing, this sub-district is supported MIMO pattern and CoMP type and at described UE;
Each described measurement sub-district determines whether to provide CoMP service and the CoMP type that is provided for described UE according to cooperation message; This sub-district and each provide the cooperation cell of CoMP service according to described CoMP type, are described UE transmission data.
Preferably, K the strongest sub-district of selective reception pilot frequency intensity from the neighbor cell of described this sub-district is as measuring the sub-district.
Preferably, when described base station is only supported SU-MIMO and is only supported inter-cell united beam shaping,
The CSI of this sub-district that described UE reports comprises: the average CQI of total bandwidth and the CQI of each sub-frequency bands when described PMI or wave beam numbering are adopted in pre-coding matrix index PMI that use the recommendering folder sub-district or wave beam numbering, this sub-district;
The CSI of the measurement sub-district that described UE reports comprises: the PMI or the set of wave beam numbering of measuring the sub-district forbidding; With, when PMI that use this employing recommendering folder sub-district, sub-district or wave beam numbering, measure the sub-district use described UE take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, during with PMI that adopts described UE to take to forbid on the running time-frequency resource or wave beam numbering, the CQI difference DELTA CQI of UE received signal 0
Preferably, when described base station is only supported SU-MIMO and is only supported inter-cell united transmission,
The CSI of this sub-district that described UE reports comprises: the average CQI of total bandwidth and the CQI of each sub-frequency bands when described PMI or wave beam numbering are adopted in PMI that use the recommendering folder sub-district or wave beam numbering, this sub-district;
The channel condition information of the measurement sub-district that described UE reports comprises: recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out in the sub-district; The received signal CQI of UE when adopting PMI that recommendering folder sub-district uses or wave beam numbering to carry out transfer of data separately, the difference DELTA CQI between the described UE received signal CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission with, this sub-district 1
Preferably, when described base station is supported MU-MIMO and is only supported inter-cell united beam shaping,
The channel condition information of this sub-district that described UE reports comprises: the average CQI of total bandwidth and the CQI of each sub-frequency bands behind the PMI that adopted the recommendering folder sub-district when UE monopolized this local resource, the described PMI of employing; The PMI that use other each pairing user the recommendering folder sub-district when matching with, UE and other users and match the CQI of the described UE received signal in back and the CQI of each sub-frequency bands with other each pairing user;
The channel condition information of the measurement sub-district that described UE reports comprises: the PMI or the set of wave beam numbering of measuring the sub-district forbidding; With, this sub-district adopts the PMI of recommendering folder sub-district or wave beam to number when monopolizing this local resource, measure the sub-district use described UE take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, during with PMI that adopts described UE to take to forbid on the running time-frequency resource or wave beam numbering, the CQI difference DELTA CQI of UE received signal 0
Preferably, when described base station is supported MU-MIMO and is only supported inter-cell united transmission,
The channel condition information of this sub-district that described UE reports comprises: the PMI that adopted the recommendering folder sub-district when UE monopolized this local resource and adopt described PMI after the average CQI of total bandwidth and the CQI of each sub-frequency bands; Match the CQI of the described UE received signal in back and the CQI of each sub-frequency bands with, the PMI that used other each pairing user the recommendering folder sub-district when UE and other users matched and with other each pairing user;
The channel condition information of the cooperation cell that described UE reports comprises: recommend to measure the sub-district and carry out PMI or the set of wave beam numbering that joint transmission adopts; The received signal CQI of UE when adopting PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource to carry out transfer of data separately, the difference DELTA CQI between the described UE received signal CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission with, this sub-district 1
Preferably, when described base station is supported MU-MIMO and is supported minizone beam shaping and joint transmission simultaneously,
The channel condition information of this sub-district that described UE reports comprises: the PMI that adopted the recommendering folder sub-district when UE monopolized this local resource and adopt described PMI after the average CQI of total bandwidth and the CQI of each sub-frequency bands; The PMI that use other each pairing user the recommendering folder sub-district when matching with, UE and other users and match the CQI of the described UE received signal in back and the CQI of each sub-frequency bands with other each pairing user;
The channel condition information of the measurement sub-district that described UE reports comprises: the PMI or the set of wave beam numbering of measuring the sub-district forbidding; With, this sub-district adopts the PMI of recommendering folder sub-district or wave beam to number when monopolizing this local resource, measure the sub-district use described UE take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, during with PMI that adopts described UE to take to forbid on the running time-frequency resource or wave beam numbering, the CQI difference DELTA CQI of UE received signal 0With, recommend to measure the sub-district and carry out PMI or the set of wave beam numbering that joint transmission adopts; The received signal CQI of UE when adopting PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource to carry out transfer of data separately, the difference DELTA CQI between the UE received signal CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission with, this sub-district 1
Preferably, when described base station was only supported SU-MIMO and only supported inter-cell united beam shaping, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described cooperation cell sent:
Recommend cooperation cell on the running time-frequency resource that described UE takies, to serve PMI or the set of wave beam numbering that other UE adopt; With,
When this sub-district adopts PMI that described UE recommends or wave beam numbering to monopolize this local resource, the CQI of described UE received signal when measuring the sub-district and using described UE to take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, the difference DELTA CQI when numbering between the CQI of described UE received signal with PMI that uses described UE to take to forbid on the running time-frequency resource or wave beam 0
Preferably, when described base station was only supported SU-MIMO and only supported inter-cell united transmission, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out to described UE in the sub-district on the running time-frequency resource that described UE takies; With,
The CQI of the received signal of UE when this sub-district adopts the PMI of recommendering folder sub-district or wave beam numbering to monopolize this local resource to carry out the independent data transmission, the difference DELTA CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission between the CQI of described UE received signal 1
Preferably, when described base station was supported MU-MIMO and only supported inter-cell united beam shaping, described base station took corresponding resource and the CQI difference of recommending corresponding cooperation cell on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Take the PMI or the set of wave beam numbering of forbidding when other UE are served in the measurement sub-district on the running time-frequency resource at described UE; With,
This sub-district adopt PMI that recommendering folder sub-district uses or wave beam numbering monopolize this local resource or with other UE pairings after, the CQI of described UE received signal when measuring the sub-district and using described UE to take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, the difference DELTA CQI when numbering between the CQI of described UE received signal with PMI that uses described UE to take to forbid on the running time-frequency resource or wave beam 0
Preferably, when described base station was only supported MU-MIMO and only supported inter-cell united transmission, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out to described UE in the sub-district on the running time-frequency resource that described UE takies; With,
This sub-district adopts PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource or and other UE pairings and only CQI, the difference DELTA CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission between the CQI of described UE received signal of this sub-district described UE received signal when described UE transmission data 1
Preferably, when described base station was supported MU-MIMO and supported inter-cell united beam shaping and joint transmission simultaneously, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Take the PMI or the set of wave beam numbering of forbidding when other UE are served in the measurement sub-district on the running time-frequency resource at described UE; With,
This sub-district adopt PMI that recommendering folder sub-district uses or wave beam numbering monopolize this local resource or with other UE pairings after, the CQI of described UE received signal when measuring the sub-district and using described UE to take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, the difference DELTA CQI when numbering between the CQI of described UE received signal with PMI that uses described UE to take to forbid on the running time-frequency resource or wave beam 0
With, recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out to described UE in the sub-district on the running time-frequency resource that described UE takies; With,
This sub-district adopts PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource or and other UE pairings and only CQI, the difference DELTA CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission between the CQI of described UE received signal of this sub-district described UE received signal when described UE transmission data 1
Preferably, under different MIMO patterns and CoMP type, described UE adopts the unified message format that is provided with when reporting this sub-district and measuring sub-district CSI.
Preferably, described UE reports the CSI of this sub-district and the CSI of measurement sub-district respectively, and the report cycle of the channel condition information of this sub-district is equal to or less than the report cycle of the channel condition information of measuring the sub-district.
Preferably, under different MIMO patterns and CoMP type, the message format of the Resources allocation that described base station sends to the measurement sub-district, the MIMO pattern of support and CoMP type, the unified setting of employing when measuring sub-district CSI.
Preferably, if described base station sends the cycle of the cycle of measurement message greater than described UE reporting measurement sub-district CSI to measuring the sub-district, when then described base station sends cooperation message to the measurement sub-district, with all Δ CQI that do not send 1Send after average, with all Δ CQI that do not send 0Send after average.
Preferably, when the CoMP type that is defined as described UE and provides when arbitrary described measurement sub-district was inter-cell united transmission, this method further comprised: will the cooperate time frequency space resource used of this measurement sub-district feeds back to the base station of described this sub-district; Described cell base station sends to this cooperation cell with data, transformat and the antenna end slogan that this cooperation cell sends.
Preferably, during for UE transmission data, if described CoMP type is the multi-plot joint beam shaping, the CQI in this sub-district CSI information that this sub-district reports according to described UE determines MCS; If described CoMP type is multi-plot joint transmission, CQI in this sub-district CSI information that this sub-district reports according to described UE and the Δ CQI in the cooperation cell CSI information 1Determine MCS.
As seen from the above technical solution, among the present invention, the UE of multi-point cooperative transmission, from the neighbor cell of this sub-district, select K sub-district as measuring the sub-district, MIMO pattern and CoMP type that this UE supports according to this sub-district report this sub-district and the channel condition information (CSI) of measuring the sub-district to the base station of this sub-district; The base station of this sub-district, according to the MIMO pattern of this sub-district support and the CSI of CoMP type and UE transmission, finish scheduling and the resource allocation of UE, and measure the MIMO pattern of resource that cell transmission distributes for this UE, this sub-district support and CoMP type and take to each and recommend corresponding resource and the CQI difference of respectively measuring the sub-district on running time-frequency resource at UE; Each is measured the sub-district and determines whether to be cooperation cell for this UE provides CoMP service and CoMP type for UE provides the measurement sub-district of CoMP service; This sub-district and each cooperation cell are UE transmission data according to the CoMP type of determining.By the way, finish the CoMP transmitting and scheduling resource allocation of UE, promptly carry out the CoMP transmission based on local scheduler by the base station of sub-district, UE place.Like this, at first finish the resource allocation of UE by the base station, send to corresponding measurement sub-district with recommending the respective resources of measuring the sub-district on this Resources allocation again,, can significantly reduce amount of information mutual between the base station with respect to the resource of will recommend on each running time-frequency resource transmission manner between the base station.
Description of drawings
Fig. 1 is the schematic diagram of inter-cell united beam shaping under the SU-MIMO; Wherein, the useful signal of 1:MS1; 2: to the interference of MS1; The useful signal of 3:MS2; 4: to the interference of MS2.
Fig. 2 is the schematic diagram of inter-cell united beam shaping under the MU-MIMO; Wherein, the useful signal of 1:MS1; 2: to the interference of MS1; The useful signal of 3:MS2; 4: to the interference of MS2; The useful signal of 5:MS3; 6: to the interference of MS3.
Fig. 3 is the schematic diagram of inter-cell united transmission under the SU-MIMO; Wherein, the useful signal of 1:MS1; The useful signal of 2:MS2.
Fig. 4 is the schematic diagram of inter-cell united transmission under the MU-MIMO; Wherein, the useful signal of 1:MS1; The useful signal of 2:MS2; The useful signal of 3:MS3.
Fig. 5 is the schematic diagram that multiple MIMO mode mixture is used; Wherein, the useful signal of 1:MS1; 2: to the interference of MS1; The useful signal of 3:MS2; 4: to the interference of MS2; The useful signal of 5:MS3; 6: to the interference of MS3.
Fig. 6 is the schematic diagram of various CQI differences.
Embodiment
For making purpose of the present invention, technological means and advantage clearer, the present invention is described in further details below in conjunction with accompanying drawing.
Basic thought of the present invention is: after finishing the UE scheduling of resource by the sub-district at CoMP UE place, only will recommend other resources of measuring the sub-district on the shared running time-frequency resource of this UE transmits, and, no longer between the base station, transmit the resource information of recommending for the shared running time-frequency resource of non-UE.
Usually, lower for Cell Edge User SINR value, adopt the CoMP transmission means can effectively eliminate interference among adjacent cells, improve the Data Receiving performance; And for Cell Center User, SU-MIMO or MU-MIMO can provide higher performance gain, then do not adopt the CoMP transmission means, therefore, usually adopt the CoMP transmission means for Cell Edge User, described CoMP UE is Cell Edge User just, and adopts SU-MIMO or MU-MIMO for Cell Center User.
In addition, the scene that is suitable for of various MIMO patterns and the performance of generation depend on network topology and wireless transmission environment (multipath, antenna angle of arrival, channel relevancy) and QoS of survice requirement (single user rate, average throughput, time delay etc.).SU-MIMO, MU-MIMO and CoMP-MIMO have advantage separately, and a certain MIMO pattern can not be applicable to all scenes, so only to dispose a kind of MIMO pattern in the IMT-A system be poor efficiency.For the business that requires for different QoS in various wireless environment provides service, system need dispose multiple MIMO pattern, and switches between various patterns neatly according to the applied environment of complexity.Fig. 5 is the example that multiple MIMO mode mixture is used, and BS2 serves MS2 and MS3 so it simultaneously and is operated in the MU-MIMO pattern; And BS1 and BS3 only are MS1 and MS3 service so are operated in the SU-MIMO pattern.MS3 receives the transmission of BS2 and BS3 simultaneously, therefore is operated in CoMP joint transmission pattern; MS1 receives only the data of BS1, and BS3 avoids the interference to MS1 by " the empty branch " simultaneously, so MS1 is operated in CoMP united beam excipient pattern; Similar with MS1, MS2 provides data transport service by BS2, and BS1 has avoided the interference to MS2 simultaneously, so MS2 is operated in CoMP united beam excipient pattern.In sum, seven kinds of combinations shown in the total table 1 of the MIMO pattern of base station support and CoMP type:
Figure B2009100839650D0000101
Table 1
Next introduce the CoMP transmission method basic procedure based on local scheduler of the present invention.Wherein, be transmitted as example so that a CoMP UE is carried out CoMP, suppose that this UE is UE A, this method comprises:
Step 101, UE A selects K sub-district as measuring the sub-district from the neighbor cell of this sub-district, and according to MIMO pattern and the CoMP type that this sub-district is supported, UE A reports the channel condition information CSI of this sub-district and measurement sub-district to the base station of this sub-district; Wherein, described K is the constant of systemic presupposition.
Step 102, MIMO pattern and CoMP type that the base station of this sub-district is supported according to this sub-district, carry out scheduling and the resource allocation of UE A, and determine to step 101 each measure cell transmission, the resource of distributing for described UE, the MIMO pattern that this sub-district is supported and CoMP type and take reference informations such as the corresponding resource of recommending corresponding measurement sub-district on the running time-frequency resource and CQI difference at UE A.
In this step, this cell base station distributes running time-frequency resource according to the information that UE A reports for this UE A, then, measure cell transmission to each and distribute to the running time-frequency resource of UE A, the MIMO pattern and the CoMP type of this sub-district support and resource and the CQI difference of recommending corresponding measurement sub-district.Wherein, the MIMO pattern of this sub-district support and CoMP type are one of five kinds of corresponding combinations of Cell Edge User in the aforementioned table 1 (being CoMP UE).Sending to the resource and the CQI difference of the recommendation of measuring the sub-district, is to recommend the resource of measuring the sub-district on this cell base station is distributed to the running time-frequency resource (being the running time-frequency resource that UE A takies) of UE A, comprises information such as PMI or wave beam numbering and CQI.
Step 103, each is measured the sub-district and is defined as the CoMP type that UE A provides, and this sub-district and each cooperation cell are UE A transmission data according to the CoMP type of determining.
Each measures the information that the sub-district sends according to this cell base station in the step 102, and MIMO pattern of self supporting and CoMP type, and determining whether provides CoMP service and CoMP type for UE A; For UE A provides the measurement sub-district of CoMP service is the cooperation cell of UE A; Cooperation cell is carried out the synergistic data transmission of UE A with this sub-district.
The above-mentioned describe, in general terms that is the inventive method has wherein provided among the present invention the CoMP transfer process based on local scheduler.In this flow process, the CoMP transmission with respect to the combined dispatching in the background technology has significantly reduced amount of information mutual between the base station.
Next, by a specific embodiment explanation specific implementation of the present invention.Particularly, still supposition treats that service-user is UE A, and the method flow in the present embodiment comprises:
Step 201 is judged user type, for CoMP UE, determines to measure the sub-district.
In the present embodiment, can determine that at first service UE is edge customer or central user, if central user, then determine SU-MIMO or MU-MIMO mode according to the mode of prior art, for this UE provides data transport service, if edge customer then carries out the CoMP transmission according to the mode among the present invention.
Particularly, the co-channel interference that Cell Edge User is subjected to is bigger than Cell Center User, therefore this sub-district that can report according to UE measurements, the base station (being this cell base station) of sub-district, UE place and neighbor cell determine UE to the circuit loss value SINR of UE down direction SINR value whether above system's predefine thresholding, determine whether to be Cell Edge User.
The SINR computing formula is as follows:
SINR = P 0 / L 0 Σ n P i / L i + N
P i: the pilot tone transmitted power of i neighbor cell;
P 0: the pilot tone transmitted power of this sub-district;
N: noise power;
Figure B2009100839650D0000121
Receive the reception pilot power sum of n the strongest sub-district of pilot power, n is specified by system.
L i: cell i is to the path loss of UE.
When the SINR of UE value during greater than the thresholding α of systemic presupposition, judgement UE is a Cell Edge User, otherwise judgement UE is a Cell Center User.After definite UE was Cell Edge User, this UE selected K the strongest sub-district of reception pilot frequency intensity except that this sub-district, and as measuring the sub-district, wherein, K is by default.
Step 202, MIMO pattern and CoMP type that UE A supports according to this sub-district report this sub-district and the CSI that measures the sub-district to the base station of this sub-district.
For the back-up system side the time-frequently-scheduling decision on the null resource, UE needs the content of reporting status information of channel, there are 7 kinds in the system and mix the MIMO mode, MIMO pattern of supporting according to UE position and this cell base station and CoMP type different, the CSI information content that UE need report is also different.The CSI content that reports with regard to UE A under all kinds of situations respectively is introduced below:
1. Cell Center User
Owing to do not need to consider transmission, only need to measure in real time the channel quality that reports in this sub-district, to support time-frequency scheduling and Adaptive Modulation and Coding (MCS) to UE with neighbor cell CoMP.For the service of Cell Center User, be supported between SU-MIMO and the MU-MIMO and switch.
Zero cell base station is only supported the SU-MIMO pattern
The CSI that reports with UE among the LTE R8 is identical, and the information that UE A need report comprises: the recommendering folder cell base station is used for the pre-coding matrix index (PMI) of this UE, and adopts the average CQI of total bandwidth behind this PMI and the CQI of each sub-frequency bands.
Zero cell base station is supported the MU-MIMO pattern
Different with SU-MIMO, the MU-MIMO support space is multiplexing, the PMI that UE A recommendering folder cell base station when reporting exclusive resource adopts when being UEA transmission data, and adopt outside the CQI of the average CQI of total bandwidth behind this PMI and each sub-frequency bands, UE A also needs to report the PMI that uses when the recommendering folder cell base station transmits data for other users when matching with other users and matches the afterwards CQI of UE A received signal and the CQI of each sub-frequency bands with other users.Wherein, recommend other users' the PMI can be more than one, need report corresponding CQI at each PMI that recommends other users.
2. Cell Edge User
This cell base station is supported in the method for service of edge customer between 5 kinds of modes of the Cell Edge User correspondence shown in the table 1 and switches.
The SU-MIMO pattern is only supported in zero this sub-district
A, inter-cell united beam shaping (CB)
This cell channel status report is identical with LTE Rel 8:
PMI or wave beam numbering that ■ UEA reports the recommendering folder sub-district to use.
The average CQI of the total bandwidth when ■ adopts this sub-district UEA to recommend PMI or wave beam numbering and the CQI of each sub-frequency bands.
Each is measured the channel conditions report of sub-district:
■ measures the PMI or the wave beam numbering set (all the other are non-forbidding) of sub-district forbidding.
When ■ adopts this sub-district this recommendation PMI or wave beam numbering, CQI difference (the Δ CQI of UE received signal when measuring the sub-district and using the PMI of non-forbidding on the identical running time-frequency resource or wave beam numbering with PMI that adopts forbidding or wave beam numbering 0).
B, inter-cell united transmission (JP)
This cell information that UE need report is identical with inter-cell united beam shaping.Help this sub-district to be edge UE service but inter-cell united transmission is a cooperation cell, need the channel conditions report of different measurement sub-districts, the CSI that each that specifically reports measured the sub-district comprises:
■ recommends to measure PMI or the set of adopting when joint transmission is carried out in the sub-district of wave beam numbering.
The received signal CQI of UE when ■ adopts this sub-district this recommendation PMI or wave beam numbering, CQI difference (the Δ CQI of UE received signal when carrying out joint transmission with PMI that considers measurement sub-district use UE recommendation or wave beam numbering 1).
Zero network side is supported the MU-MIMO pattern
A, inter-cell united beam shaping (CB)
Different with SU-MIMO, MU-MIMO supports spatial reuse in this sub-district, and this cell channel situation that UE A reports comprises:
The PMI that the recommendering folder cell base station adopted when ■ UE A monopolized this local resource, and adopt the average CQI of total bandwidth behind this PMI and the CQI of each sub-frequency bands;
The CQI of UE A received signal and the CQI of each sub-frequency bands after the recommendering folder cell base station matched for the PMI of other users' uses and with other users when ■ UEA and other users matched.Wherein, recommend other users' the PMI can be more than one, need report corresponding CQI at each PMI that recommends other users.
The CSI that measures the sub-district comprises:
■ measures the PMI or the wave beam numbering set (other are non-forbidding) of sub-district forbidding.
When this sub-district of ■ adopts UEA to recommend the PMI of this cell base station or wave beam numbering to monopolize this local resource, CQI difference (the Δ CQI of UE received signal when measuring the sub-district and using this cell allocation to give PMI that the running time-frequency resource B of UE A goes up non-forbidding or wave beam numbering and adopt running time-frequency resource B to go up the PMI of forbidding or wave beam numbering 0);
B, inter-cell united transmission (JP)
With inter-cell united beam shaping difference, inter-cell united transmission is that cooperation cell helps this sub-district to be edge UE service.
This sub-district CSI that UE need report has:
The PMI that adopted the recommendering folder sub-district when ■ UE A monopolized this local resource, and adopt the average CQI of total bandwidth behind this PMI and the CQI of each sub-frequency bands;
The CQI of UE A received signal and the CQI of each sub-frequency bands after the recommendering folder cell base station matched to the PMI of other users' uses and with other users when ■ UEA and other users matched.Wherein, recommend other users' the PMI can be more than one, need report corresponding CQI at each PMI that recommends other users.
The CSI that measures the sub-district comprises:
■ recommends cooperation cell to carry out PMI or the set of wave beam numbering that joint transmission adopts;
This sub-district of ■ adopts UE A to recommend that the PMI of this sub-district or wave beam numbering monopolize that community associated transmission is not measured with other in this local resource and this sub-district but the received signal CQI of UE during the data of independent transmission UE A, and this sub-district and measure the PMI that uses UE A to recommend to use separately in the sub-district or the CQI of wave beam numbering UE received signal when carrying out joint transmission between difference (Δ CQI 1).
C, support united beam excipient and joint transmission (CB/JP) simultaneously
Under the MU-MIMO pattern, system can support united beam excipient and two kinds of cooperative modes of joint transmission simultaneously.
The information that UE reports in the time of need measuring this sub-district CSI of reporting with above united beam excipient and joint transmission is identical:
The PMI that the recommendation network side adopted when ■ UE A monopolized this local resource, and the average CQI that adopts total bandwidth behind this PMI, the CQI of sub-band;
■ UEA and other users recommend other users to use when matching PMI, and and other users match the CQI of back UE A received signal and the CQI of each sub-frequency bands.Wherein, recommend other users' the PMI can be more than one, need report corresponding CQI at each PMI that recommends other users.
The measurement sub-district CSI that UE need report comprises:
■ measures the PMI or the wave beam numbering set (other are non-forbidding) of sub-district forbidding.
When this sub-district of ■ adopts UE A to recommend PMI or wave beam numbering to monopolize this local resource, measure the sub-district and use that the running time-frequency resource (being the running time-frequency resource that UE A takies) of distributing to UE A is gone up the PMI of non-forbidding or wave beam numbering, CQI difference (the Δ CQI of UEA received signal during with PMI that adopts forbidding or wave beam numbering 0);
■ recommends to measure the sub-district and carries out PMI or the set of wave beam numbering that joint transmission adopts;
The received signal CQI of UE when this sub-district of ■ adopts UE A to recommend the PMI of this sub-district or wave beam numbering to monopolize this local resource, with this sub-district and measure the sub-district use UE A recommend separately PMI or CQI difference (the Δ CQI of wave beam numbering UE received signal when carrying out joint transmission 1).
Above-mentioned being in all cases, UE A feeds back to the CSI content of this cell base station.Specifically give the correct time on the above-mentioned CSI carrying out,, can adopt the unified message format that is provided with for various situation.Particularly, in the message of feedback, UE type field, MIMO pattern field, CoMP type field and DCI field are set.Wherein, UE type field, MIMO pattern field and CoMP type field are respectively applied for the type (being edge customer or central user) of carrying this UE, the MIMO pattern (being SU-MIMO or MU-MIMO) of this cell base station support and CoMP type (inter-cell united beam shaping or the inter-cell united transmission that this cell base station is supported, or, support inter-cell united beam shaping and joint transmission simultaneously); And determine the content of DCI field according to the concrete value of above-mentioned three fields.In more detail, under various UE types, MIMO pattern and the CoMP type, the theing contents are as follows of each field in the feedback message:
● Cell Center User, SU-MIMO
User-Type?MIMO?Mode DCI?Info
0 0 PMI CQI/RI
● Cell Center User, MU-MIMO
User-Type?MIMO?Mode DCI?Info
0 1 PMI 0 CQI 0/RI PMI 1 CQI 1
● Cell Edge User, SU-MIMO, CB
User-Type?MIMO?Mode?CoMP?Mode DCI?Info
● Cell Edge User, MU-MIMO, CB
User-Type?MIMO?Mode?CoMP?Mode DCI?Info
Figure B2009100839650D0000162
● Cell Edge User, SU-MIMO, JP
User-Type?MIMO?Mode?CoMP?Mode DCI?Info
● Cell Edge User, MU-MIMO, JP
User-Type?MIMO?Mode?CoMP?Mode DCI?Info
Figure B2009100839650D0000164
● Cell Edge User, MU-MIMO, JP/CB
User-Type?MIMO?Mode?CoMP?Mode DCI?Info
Figure B2009100839650D0000165
Common feedback message format under above-mentioned various different MIMO patterns and the CoMP type (above-mentioned totally 7 kinds) has avoided the feedback message formats when the CoMP mode switch to change.
Want feedack as seen by above-mentioned UE A, under the CoMP pattern, UE need feed back a large amount of CSI information, wherein not only comprises the CSI of this sub-district, also comprises the CSI of other measurement sub-districts.Therefore, consider the numerous information that report, preferably, this sub-district CSI information can be reported respectively with measurement sub-district CSI.Particularly, this sub-district reports simultaneously with measurement sub-district CSI when PUCCH, PUSCH resource abundance; When resource-constrained, the report cycle of measuring sub-district CSI can be bigger, and CSI reports respectively with this sub-district.
The above-mentioned mode that reports respectively is to the choice between CoMP performance and the up expense.CoMP is as the interference cancellation techniques that strengthens, and the poorest situation is to measure sub-district CSI report cycle endless, and when the X2 interface ability was not limited, it was short more to measure sub-district CSI report cycle, and the CoMP performance is good more, and up expense is big more.
Step 203, MIMO pattern and CoMP type that the base station of this sub-district is supported according to this sub-district are carried out scheduling and the resource allocation of UE A.
The control sub-district is adopted identical dispatching method to central user with edge customer:
If this cell base station adopts the SU-MIMO mode, recommending the PMI that uses and the buffer status of UE by UE A is the suitable running time-frequency resource of UE A selection, and UE monopolizes this running time-frequency resource.
If this cell base station adopts the MU-MIMO mode, at first the PMI (can be more than) that recommends the PMI that uses and recommend other users to use according to UE A seeks the pairing user for this UE, if find the pairing user, then distributes identical running time-frequency resource to them; If do not find the pairing user of UE A, then make this UE A monopolize a time-frequency resource.
For the center cell user, after carrying out resource allocation, carry out transfer of data according to the mode of prior art, for the edge cell user, continue to carry out following steps and carry out the CoMP transmission.
Step 204, each that determine to step 201 measured cell transmission, the resource of distributing for UE A, the MIMO pattern that this sub-district is supported and CoMP type and take the reference informations such as corresponding resource of recommending corresponding measurement sub-district on the running time-frequency resource at UE A.
With UE A feedback CSI info class in the abovementioned steps 202 seemingly, this cell base station also is with the different of a CoMP type and to some extent difference of the MIMO pattern supported according to this sub-district to the information of measuring cell transmission in this step.Next, under the various situations of classificating introduction, send to the information of measuring the sub-district.
Zero network side is only supported the SU-MIMO pattern
1. inter-cell united beam shaping
For after UE A dispatched resource, this sub-district will send cooperative information to measuring the sub-district, comprise:
■ sends the running time-frequency resource that UE A takies in real time
■ sends in real time or periodically and recommends the measurement sub-district to take PMI or the set of wave beam numbering that other UE of service (i.e. other UE except that UE A) adopt on the running time-frequency resource at UE A;
When this sub-district of ■ adopts PMI that UE A recommends or wave beam numbering to monopolize this local resource, measure the sub-district and use that UE A takies the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, CQI difference (the Δ CQI of UE A received signal during with PMI that adopts UE A to take to forbid on the running time-frequency resource or wave beam numbering 0); When the time-delay of X2 mouth is big, send average CQI difference with longer cycle
2. inter-cell united transmission
This sub-district is for after edge UE dispatched resource, and this sub-district will send cooperative information to relevant adjacent sub-district, comprise:
■ sends the running time-frequency resource that UE A takies in real time;
■ sends in real time or periodically and recommends to measure PMI or the set of adopting when joint transmission is carried out to UE A in the sub-district on this resource of wave beam numbering;
■ send in real time UEA when the PMI that recommends this sub-district is adopted in this sub-district or the wave beam numbering is monopolized this local resource and only this sub-district sends data to UEA received signal CQI, with this sub-district and measure the sub-district use UE A recommend separately PMI or CQI difference (the Δ CQI of wave beam numbering UE A received signal when carrying out joint transmission 1); When the time-delay of X2 mouth is big, send average CQI difference with longer cycle
Figure B2009100839650D0000182
Zero network side is supported the MU-MIMO pattern
1. inter-cell united beam shaping
For after UEA dispatched resource, this sub-district will send cooperative information to measuring the sub-district, comprise:
■ sends the running time-frequency resource that UE A takies in real time;
■ sends in real time or periodically and forbids measuring other UE employings are served in the sub-district on the running time-frequency resource that UEA takies PMI or wave beam numbering set (all the other are non-forbidding);
■ send in real time this sub-district adopt PMI that UE A recommends or wave beam numbering monopolize this local resource or with other UE pairings after, measure the sub-district use the PMI of non-forbidding on the running time-frequency resource that UE A takies or wave beam numbering, with the running time-frequency resource that adopts UE A to take on CQI difference (the Δ CQI of UE received signal when the PMI forbidden or wave beam numbering 0); When the time-delay of X2 mouth is big, send average CQI difference with longer cycle
Figure B2009100839650D0000191
2. inter-cell united transmission
This sub-district is for after UE A dispatched resource, and this sub-district will send cooperative information to measuring the sub-district, comprise:
■ sends the running time-frequency resource that UE A takies in real time;
■ sends in real time or periodically and recommends to measure PMI or the set of adopting when joint transmission is carried out to UE in the sub-district on the running time-frequency resource that UE A takies of wave beam numbering;
■ sends in real time that the PMI that recommends this sub-district is adopted in this sub-district or the wave beam numbering is monopolized this local resource or during with other UE pairings, with this sub-district and measure the sub-district use UE A recommend separately PMI or CQI difference (the Δ CQI of wave beam numbering UE A received signal when carrying out joint transmission 1); When the time-delay of X2 mouth is big, send average CQI difference with longer cycle
3. support inter-cell united beam shaping and joint transmission simultaneously
For after UE A dispatched resource, this sub-district will send cooperative information to measuring the sub-district, comprise:
■ sends the running time-frequency resource that UE A takies in real time;
■ sends in real time or periodically and forbids measuring the sub-district takies other UE employings of service on the running time-frequency resource at UE A PMI or wave beam numbering set (other are non-forbidding);
■ send in real time this sub-district adopt UE A recommend the PMI of this sub-district or wave beam numbering monopolize this local resource or with other UE pairings after, measure the sub-district and use that UE A takies the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, CQI difference (the Δ CQI of UE received signal during with PMI that adopts UEA to take to forbid on the running time-frequency resource or wave beam numbering 0); When the time-delay of X2 mouth is big, send average CQI difference with longer cycle
Figure B2009100839650D0000193
■ sends in real time or periodically and recommends to measure the sub-district and take on the running time-frequency resource PMI or the set of adopting when UEA carried out joint transmission of wave beam numbering at UEA;
■ sends this sub-district in real time and adopts the PMI that recommends this sub-district or wave beam numbering to monopolize this local resource or and other UE pairings and CQI, difference (the Δ CQI with this sub-district and when measuring the sub-district and using PMI that UE recommends or wave beam to number to carry out joint transmission between the CQI of UE A received signal of UE A received signal when only this sub-district is UE A transmission signals 1); When the time-delay of X2 mouth is big, send average CQI difference with longer cycle
Figure B2009100839650D0000201
Above-mentioned being in all cases, this cell base station send to the information content of measuring the sub-district.Wherein, the schematic diagram of various CQI differences as shown in Figure 6.Specifically,, can adopt the unified message format that is provided with for various situation carrying out above-mentioned information when sending.Particularly, CoMP type field and csi field are set in interference coordination message.Wherein, the CoMP type field is used to carry the CoMP type that this cell base station supports (inter-cell united beam shaping or inter-cell united transmission, or, support inter-cell united beam shaping and joint transmission simultaneously); And determine the content of csi field according to the concrete value of this CoMP field.In more detail, under the various CoMP types, the theing contents are as follows of each field in the cooperation message:
●MU-MIMO/SU-MIMO，CB
CoMP?Mode CSI?Info
Figure B2009100839650D0000202
●MU-MIMO/SU-MIMO，JP
CoMP?Mode CSI?Info
●MU-MIMO，JP/CB
CoMP?Mode CSI?Info
Figure B2009100839650D0000204
Public message form under the above-mentioned various different CoMP types (above-mentioned totally 7 kinds) has been avoided the variation of the cooperation message format when the CoMP mode switch.
If this cell base station can be circulated a notice of disturbed condition to measuring the sub-district in real time with the frequency of UE A feedback CSI, then measure the sub-district and can in time make corresponding resource adjustment, the CoMP performance can guarantee so.But owing to be subject to the defeated time delay of X2 oral instructions (may because load is heavier or itself do not satisfy the CoMP delay requirement), the cooperation message sink is lagged behind, the Interference Control of minizone can not in time be followed the variation of channel, makes systematic function obtain negative gain probably.
Therefore, preferably, system can be according to X2 mouth ability and load condition self adaptation adjustment cooperation transmission of messages cycle in the present embodiment.If the cooperation transmission of messages cycle greater than the cycle of UE feedback CSI, then will not send the CQI difference do average after
Figure B2009100839650D0000211
Defeated in the X2 oral instructions.When X2 mouth limited ability, make presence of intercell interference control can follow the long-time quality of channel, X2 message is controlled in the performance loss that the hysteresis of reduction transmission of messages brings simultaneously makes expense.
Step 205 is measured the sub-district according to up-to-date cooperation message, and determining whether provides CoMP service and the CoMP type that is provided for UE A.
After the relevant information that sends in the above-mentioned steps 204 is received in the measurement sub-district, determining whether provides CoMP service for UE A, provide CoMP service if be defined as UE A, then will be defined as UE A provides the measurement sub-district of CoMP service to be called cooperation cell, and further determines the CoMP type that cooperation cell provides.Specifically determine whether to provide the mode of the CoMP service and the CoMP type that provides can adopt various possible modes, present embodiment is not done regulation.But the cardinal principle principle of determining is as described below:
Only support that the CoMP type is inter-cell united beam shaping if measure the sub-district, then measure the running time-frequency resource that the UE A use that comprises in this message will be avoided using in the sub-district as far as possible, or PMI or wave beam numbering that UE A forbids are served other users; To use UE A to take available PMI or other users of wave beam numbering service that the UE A on the resource recommends as far as possible.
Only support that the CoMP type is inter-cell united transmission if measure the sub-district, then measure the sub-district receive the cooperation message after, the use of trying one's best is taken the PMI or the wave beam numbering of recommending on the running time-frequency resource to adopt at UE A UE A is carried out joint transmission, or avoid using the running time-frequency resource identical with UE A.
Support inter-cell united beam shaping and joint transmission simultaneously if measure the sub-district, after then measuring the sub-district and receiving cooperation message, the running time-frequency resource that will avoid using the UE A that comprises in this information to use, or UE A PMI or other users of wave beam numbering service of forbidding; To use UE A to take available PMI or other users of wave beam numbering service that the UE A on the resource recommends, or PMI or the wave beam numbering of using UE A to recommend be carried out joint transmission to UE A as far as possible.
If it is that UE A provides CoMP service that cooperation cell is determined with community associated transmission means, send the cooperation response message in real time to this cell base station.Message content comprises the running time-frequency resource position that joint transmission takies.This cell base station need send to cooperation cell by wired carrying with data, transformat and the antenna end slogan that cooperation cell sends after receiving this interference cooperation response message.
Step 206, the CoMP type that this sub-district and cooperation cell are determined according to step 205 is UE A transmission data.
During for UE transmission data, if the CoMP type is the united beam excipient, the CQI in this sub-district CSI information that this sub-district reports according to described UE determines MCS; If the CoMP type is joint transmission, CQI in this sub-district CSI information that this sub-district reports according to described UE and the Δ CQI in the cooperation cell CSI information 1Determine MCS.
So far, the method flow of present embodiment finishes.
By the specific implementation of the invention described above as seen, the present invention is based on the multi-point cooperative transmission scheme of local scheduler, compare with the transmission plan of combined dispatching device, local scheduling mode Signalling exchange amount is few, dispatching algorithm is simple, with the dynamic interference coordination scheme among the Rel-8 stronger compatibility is arranged, less to the standard influence, this patent has proposed specific implementation at local scheduling.
This scheme back-up system switches under different CoMP patterns flexibly, and unified UE feedback message formats and minizone cooperation message format under the various CoMP patterns avoided the variation of the message format when the CoMP mode switch.
The present invention proposes UE feedback message compression method and reduces the signaling consumption that UE measures reporting information; X2 mouth cooperation message compression methods has reduced X2 message makes expense, has reduced the loss that systematic function is brought by the influence of X2 time delay simultaneously.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (18)

1. the multi-point cooperative transmission method based on local scheduler is characterized in that, this method comprises:
The UE of multi-point cooperative transmission CoMP selects K sub-district as measuring the sub-district from the neighbor cell of this sub-district, and MIMO pattern and CoMP type that described UE supports according to this sub-district report this sub-district and the channel condition information CSI that measures the sub-district to the base station of this sub-district; Wherein, described K is the constant of systemic presupposition;
The base station of described this sub-district, MIMO pattern and CoMP type according to this sub-district support, carry out scheduling and the resource allocation of described UE, and take corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource to each described measurement cell transmission is the described UE resource of distributing, this sub-district is supported MIMO pattern and CoMP type and at described UE;
Each described measurement sub-district determines whether to provide CoMP service and the CoMP type that is provided for described UE according to cooperation message; This sub-district and each provide the cooperation cell of CoMP service according to described CoMP type, are described UE transmission data.
2. method according to claim 1 is characterized in that, K the strongest sub-district of selective reception pilot frequency intensity from the neighbor cell of described this sub-district is as measuring the sub-district.
3. method according to claim 1 is characterized in that, when described base station is only supported SU-MIMO and is only supported inter-cell united beam shaping,
The CSI of this sub-district that described UE reports comprises: the average CQI of total bandwidth and the CQI of each sub-frequency bands when described PMI or wave beam numbering are adopted in pre-coding matrix index PMI that use the recommendering folder sub-district or wave beam numbering, this sub-district;
The CSI of the measurement sub-district that described UE reports comprises: the PMI or the set of wave beam numbering of measuring the sub-district forbidding; With, when PMI that use this employing recommendering folder sub-district, sub-district or wave beam numbering, measure the sub-district use described UE take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, during with PMI that adopts described UE to take to forbid on the running time-frequency resource or wave beam numbering, the CQI difference DELTA CQI of UE received signal 0
4. method according to claim 1 is characterized in that, when described base station is only supported SU-MIMO and is only supported inter-cell united transmission,
The CSI of this sub-district that described UE reports comprises: the average CQI of total bandwidth and the CQI of each sub-frequency bands when described PMI or wave beam numbering are adopted in PMI that use the recommendering folder sub-district or wave beam numbering, this sub-district;
The channel condition information of the measurement sub-district that described UE reports comprises: recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out in the sub-district; The received signal CQI of UE when adopting PMI that recommendering folder sub-district uses or wave beam numbering to carry out transfer of data separately, the difference DELTA CQI between the described UE received signal CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission with, this sub-district 1
5. method according to claim 1 is characterized in that, when described base station is supported MU-MIMO and is only supported inter-cell united beam shaping,
The channel condition information of this sub-district that described UE reports comprises: the average CQI of total bandwidth and the CQI of each sub-frequency bands behind the PMI that adopted the recommendering folder sub-district when UE monopolized this local resource, the described PMI of employing; The PMI that use other each pairing user the recommendering folder sub-district when matching with, UE and other users and match the CQI of the described UE received signal in back and the CQI of each sub-frequency bands with other each pairing user;
The channel condition information of the measurement sub-district that described UE reports comprises: the PMI or the set of wave beam numbering of measuring the sub-district forbidding; With, this sub-district adopts the PMI of recommendering folder sub-district or wave beam to number when monopolizing this local resource, measure the sub-district use described UE take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, during with PMI that adopts described UE to take to forbid on the running time-frequency resource or wave beam numbering, the CQI difference DELTA CQI of UE received signal 0
6. method according to claim 1 is characterized in that, when described base station is supported MU-MIMO and is only supported inter-cell united transmission,
The channel condition information of this sub-district that described UE reports comprises: the PMI that adopted the recommendering folder sub-district when UE monopolized this local resource and adopt described PMI after the average CQI of total bandwidth and the CQI of each sub-frequency bands; Match the CQI of the described UE received signal in back and the CQI of each sub-frequency bands with, the PMI that used other each pairing user the recommendering folder sub-district when UE and other users matched and with other each pairing user;
The channel condition information of the cooperation cell that described UE reports comprises: recommend to measure the sub-district and carry out PMI or the set of wave beam numbering that joint transmission adopts; The received signal CQI of UE when adopting PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource to carry out transfer of data separately, the difference DELTA CQI between the described UE received signal CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission with, this sub-district 1
7. method according to claim 1 is characterized in that, when described base station is supported MU-MIMO and is supported minizone beam shaping and joint transmission simultaneously,
The channel condition information of this sub-district that described UE reports comprises: the PMI that adopted the recommendering folder sub-district when UE monopolized this local resource and adopt described PMI after the average CQI of total bandwidth and the CQI of each sub-frequency bands; The PMI that use other each pairing user the recommendering folder sub-district when matching with, UE and other users and match the CQI of the described UE received signal in back and the CQI of each sub-frequency bands with other each pairing user;
The channel condition information of the measurement sub-district that described UE reports comprises: the PMI or the set of wave beam numbering of measuring the sub-district forbidding; With, this sub-district adopts the PMI of recommendering folder sub-district or wave beam to number when monopolizing this local resource, measure the sub-district use described UE take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, during with PMI that adopts described UE to take to forbid on the running time-frequency resource or wave beam numbering, the CQI difference DELTA CQI of UE received signal 0With, recommend to measure the sub-district and carry out PMI or the set of wave beam numbering that joint transmission adopts; The received signal CQI of UE when adopting PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource to carry out transfer of data separately, the difference DELTA CQI between the UE received signal CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission with, this sub-district 1
8. method according to claim 1, it is characterized in that, when described base station was only supported SU-MIMO and only supported inter-cell united beam shaping, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described cooperation cell sent:
Recommend cooperation cell on the running time-frequency resource that described UE takies, to serve PMI or the set of wave beam numbering that other UE adopt; With,
When this sub-district adopts PMI that described UE recommends or wave beam numbering to monopolize this local resource, the CQI of described UE received signal when measuring the sub-district and using described UE to take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, the difference DELTA CQI when numbering between the CQI of described UE received signal with PMI that uses described UE to take to forbid on the running time-frequency resource or wave beam 0
9. method according to claim 1, it is characterized in that, when described base station was only supported SU-MIMO and only supported inter-cell united transmission, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out to described UE in the sub-district on the running time-frequency resource that described UE takies; With,
The CQI of the received signal of UE when this sub-district adopts the PMI of recommendering folder sub-district or wave beam numbering to monopolize this local resource to carry out the independent data transmission, the difference DELTA CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission between the CQI of described UE received signal 1
10. method according to claim 1, it is characterized in that, when described base station was supported MU-MIMO and only supported inter-cell united beam shaping, described base station took corresponding resource and the CQI difference of recommending corresponding cooperation cell on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Take the PMI or the set of wave beam numbering of forbidding when other UE are served in the measurement sub-district on the running time-frequency resource at described UE; With,
This sub-district adopt PMI that recommendering folder sub-district uses or wave beam numbering monopolize this local resource or with other UE pairings after, the CQI of described UE received signal when measuring the sub-district and using described UE to take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, the difference DELTA CQI when numbering between the CQI of described UE received signal with PMI that uses described UE to take to forbid on the running time-frequency resource or wave beam 0
11. method according to claim 1, it is characterized in that, when described base station was only supported MU-MIMO and only supported inter-cell united transmission, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out to described UE in the sub-district on the running time-frequency resource that described UE takies; With,
This sub-district adopts PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource or and other UE pairings and only CQI, the difference DELTA CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission between the CQI of described UE received signal of this sub-district described UE received signal when described UE transmission data 1
12. method according to claim 1, it is characterized in that, when described base station was supported MU-MIMO and supported inter-cell united beam shaping and joint transmission simultaneously, described base station took corresponding resource and the CQI difference of recommending corresponding measurement sub-district on the running time-frequency resource at described UE and comprises to what described measurement sub-district sent:
Take the PMI or the set of wave beam numbering of forbidding when other UE are served in the measurement sub-district on the running time-frequency resource at described UE; With,
This sub-district adopt PMI that recommendering folder sub-district uses or wave beam numbering monopolize this local resource or with other UE pairings after, the CQI of described UE received signal when measuring the sub-district and using described UE to take the PMI of non-forbidding on the running time-frequency resource or wave beam numbering, the difference DELTA CQI when numbering between the CQI of described UE received signal with PMI that uses described UE to take to forbid on the running time-frequency resource or wave beam 0
With, recommend to measure PMI or the set of wave beam numbering adopted when joint transmission is carried out to described UE in the sub-district on the running time-frequency resource that described UE takies; With,
This sub-district adopts PMI that recommendering folder sub-district uses or wave beam numbering to monopolize this local resource or and other UE pairings and only CQI, the difference DELTA CQI with this sub-district and when measuring the sub-district and using described UE to recommend the PMI that uses separately or wave beam to number to carry out joint transmission between the CQI of described UE received signal of this sub-district described UE received signal when described UE transmission data 1
13., it is characterized in that under different MIMO patterns and CoMP type, described UE adopts the unified message format that is provided with when reporting this sub-district and measuring sub-district CSI according to arbitrary described method in the claim 3 to 7.
14. method according to claim 13 is characterized in that, described UE reports the CSI of this sub-district and the CSI of measurement sub-district respectively, and the report cycle of the channel condition information of this sub-district is equal to or less than the report cycle of the channel condition information of measuring the sub-district.
15. arbitrary described method in 12 according to Claim 8, it is characterized in that, under different MIMO patterns and CoMP type, the message format of the Resources allocation that described base station sends to the measurement sub-district, the MIMO pattern of support and CoMP type, the unified setting of employing when measuring sub-district CSI.
16. method according to claim 15, it is characterized in that, if described base station sends the cycle of the cycle of measurement message greater than described UE reporting measurement sub-district CSI to measuring the sub-district, when then described base station sends cooperation message to the measurement sub-district, with all Δ CQI that do not send 1Send after average, with all Δ CQI that do not send 0Send after average.
17. method according to claim 1, it is characterized in that, when the CoMP type that is defined as described UE and provides when arbitrary described measurement sub-district was inter-cell united transmission, this method further comprised: will the cooperate time frequency space resource used of this measurement sub-district feeds back to the base station of described this sub-district; Described cell base station sends to this cooperation cell with data, transformat and the antenna end slogan that this cooperation cell sends.
18., it is characterized in that during for UE transmission data, if described CoMP type is the multi-plot joint beam shaping, the CQI in this sub-district CSI information that this sub-district reports according to described UE determines MCS according to claim 4,6,7,9,11 or 12 described methods; If described CoMP type is multi-plot joint transmission, CQI in this sub-district CSI information that this sub-district reports according to described UE and the Δ CQI in the cooperation cell CSI information 1Determine MCS.
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