CN107395332A

CN107395332A - A kind of CQI determines method, user equipment and base station

Info

Publication number: CN107395332A
Application number: CN201610323533.2A
Authority: CN
Inventors: 姚赛杰; 任海豹; 李元杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-05-16
Filing date: 2016-05-16
Publication date: 2017-11-24
Anticipated expiration: 2036-05-16
Also published as: CN107395332B; WO2017198142A1

Abstract

The embodiment of the present invention provides a kind of CQI and determines method, user equipment and base station, it is related to the communications field, to solve the problems, such as that the expense for being measured interference using IMR when cooperation cell quantity is very big in the prior art is significantly increased with the increase of cooperation cell, including user equipment obtains the channel state information reference signals CSI RS resources of each cooperation cell configuration and at least one channel condition information interferometry CSI IM resources in collaboration set；The CSI RS resources that the user equipment configures according to each cooperation cell, calculate interference information of each cooperation cell under at least one interference combination；The user equipment is according to descending channel information of each cooperation cell at least one interference information disturbed under combining and each cooperation cell, it is determined that each cooperation cell every kind of channel quality indicator (CQI) disturbed under combining in the interference combination.The embodiment of the present invention is applied in CQI measurement scenes.

Description

A kind of CQI determines method, user equipment and base station

Technical field

The present embodiments relate to the communications field, more particularly to a kind of CQI to determine method, user equipment and base station.

Background technology

In order to improve the efficiency of frequency employment of LTE (Long Term Evolution, Long Term Evolution) network, LTE network exists When deployment, neighbor cell is generally configured to identical frequency band, still, because neighbor cell uses identical frequency band, made Generation is disturbed between obtaining neighbor cell, so as to which the handling capacity positioned at neighbor cell edge customer equipment drastically declines.With commercialization Number of user equipment rapid growth in LTE network, inter-cell interference become increasingly severe and become to influence grid appearance The deciding factor of amount.

CoMP (Coordinated Multipoint Transmission, cooperateing with multicast communication) technology can be further Improve neighbor cell edge UE handling capacity in LTE network, efficiency of frequency employment and the whole LTE network capacity of lifting.CoMP Technology is based on each cooperative base station to downlink channel state information (CSI, channel state information) and user data Different degrees of shared of information, will be that the interference of adjacent cell is changed into useful information originally by the cooperation of minizone base station, The core concept of CoMP technologies is：A UE or multiple UE is taken simultaneously by the multiple transmission point with locus adjacency Business, so as to by dynamical CSCW between geographically separated multiple base stations, reduce inter-cell interference, lifting cell edge UE is gulped down The amount of telling and throughput of system.

Wherein, CoMP technologies include descending transmission CoMP and uplink receiving CoMP, wherein, descending transmission CoMP mainly includes JT (joint transmission, Joint Transmission), cooperative scheduling and CS/CB (beam forming, Coordinated Scheduling and Beamforming) and DPS/DPB (dynamic point selection/closing, Dynamic Point Selection/ Dynamic Point Blanking), wherein, JT points are relevant JT and incoherent JT.Up CoMP technologies include joint and received (JR, Joint Reception), CS and DPS/DPB.

CoMP technologies focus primarily upon the scene of outdoor deployment, and the scene of indoor deployment is not applied also.Chamber interior The contextual data portfolio of administration is generally very big, and the radio frequency isolation degree between cooperative base station is generally poor.Large-scale indoor deployment Scene has a lot, for example, station, airport, gymnasium, supermarket and office building etc..It is different in the scene of above-mentioned indoor deployment Interference between cooperative base station can cause excessively poor Signal to Interference plus Noise Ratio (SINR, Signal to Interference and Noise Ratio) value.

Base station can be come by CQI (channel quality instruction, Channel Quality Indicator) value that UE sides are fed back Suitable resource, and modulation coding mode and transmission means are selected for UE, to reach the interference between the different cooperative base stations of reduction Purpose, while improve Signal to Interference plus Noise Ratio, in the prior art, UE generally utilizes NZP's (non-zero power, Non-zero Power) CSI-RS (channel state information reference signals, Channel State Information-Reference Signal) is measured CSI (Channel State Information, channel condition information), interference letter is measured using IMR (interferometry resource) Breath.The CSI measured and interference information are calculated and are quantified as pre-coding matrix instruction (PMI, recoding Matrix by UE Indicator), order instruction (RI, Rank Indication) and CQI, and the base station belonging to cooperation cell is fed back to, so that Obtain the CQI value fed back according to UE sides the base station belonging to serving cell and select suitable resource for UE.

But the limitation due to existing CoMP technologies in configuration, same one CSI-RS of CSI processes and one Individual CSI-IM resources are configured in a subframe, therefore there was only a small amount of interference hypothesis when UE measurement interference informations, for example, When the number of cells in collaboration set is 3, four kinds of possible CQI can only at most be reported simultaneously using above-mentioned configuration, due to not Under same interference hypothesis, UE can obtain different CQI values, when other cooperation cells cooperate to any one in UE measurement collaboration sets During the interference information of cell, IMR is configured for any one cooperation cell, any one cooperation cell is not sent out on the IMR Data are sent, remaining cooperation cell sends data on the IMR, but when cooperation cell quantity is a lot, it is difficult to meet to require, nothing Method solves this above-mentioned large-scale indoor deployment scene well, while when cooperation cell is a lot, different interference hypothesis is led The expense of interferometry resource is caused also to roll up.

The content of the invention

Embodiments of the invention provide a kind of CQI and determine method, user equipment and base station, to solve in the prior art when The problem of expense disturbed is significantly increased with the increase of cooperation cell is measured when cooperation cell quantity is very big using IMR.

To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：

In a first aspect, the embodiment of the present invention, which provides a kind of CQI, determines method, including：User equipment obtains every in collaboration set The channel state information reference signals CSI-RS of individual cooperation cell configuration and at least one channel condition information interferometry CSI-IM resources；The CSI-RS that the user equipment configures according to each cooperation cell, each cooperation cell is calculated extremely A kind of few interference information disturbed under combination；Wherein, the interference is combined as any at least one CSI-IM resources Combination；The user equipment is according to each cooperation cell at least one interference information disturbed under combining and each association Make the descending channel information of cell, it is determined that channel of each cooperation cell in the interference combination under every kind of interference combination Quality indicator (CQI).

The embodiment of the present invention provides a kind of CQI and determines method, by small each to cooperate in same process according to base station A CSI-RS and at least one CSI-IM resources for area's configuration, can be according to any in collaboration set so as to obtain user equipment The CSI-IM resources of at least one cooperation cell configuration in the CSI-IM resource and collaboration set of one cooperation cell configuration Combination determines the interference information of each cooperation cell under every kind of interference combination, and according to each cooperation cell at least one The descending channel information of interference information and each cooperation cell under interference combination, it is determined that each cooperation cell is at least one The lower channel quality indicator (CQI) of every kind of interference combination in the interference combination, due in the prior art, during measurement CQI, together One CSI processes CSI-RS is configured in a subframe with CSI-IM resources, so when the quantity of cooperation cell compares It is significantly increased when big using the expense of CSI-IM resource measurements interference with the increase of cooperation cell, therefore the embodiment of the present invention exists Same process is that each cooperation cell configures a CSI-RS and at least one CSI-IM resources, and is combined according to interference It is multiplexed CSI-RS and calculates interference information to determine CQI, CSI-IM moneys can be saved when the quantity of cooperation cell is bigger The expense in source.

With reference in a first aspect, in the first possible implementation of first aspect, the CSI-RS of each cooperation cell Resource is the CSI-RS after precoding, and the CSI-RS after the precoding is with the cooperation cell in next scheduling week The beam direction that phase sends data is consistent.It can so make it that the CQI that user equipment measures is based on next dispatching cycle CSI-RS, improve CQI measurement accuracy.

With reference in a first aspect, in second of possible implementation of first aspect, for the first cooperation cell, this One cooperation cell is any one cooperation cell in all cooperation cells in collaboration set, and user equipment is according to the first cooperation cell The CSI-RS of configuration, interference information of first cooperation cell under at least one interference combination is calculated, including：User The CSI-RS that equipment configures according to the first cooperation cell, calculate remaining cooperation in addition to the first cooperation cell in collaboration set Cell, to the jamming power of first cooperation cell under at least one interference combination；User equipment is calculated outside collaboration set Other cells to the jamming power of the first cooperation cell；User equipment is by remaining in collaboration set in addition to the first cooperation cell Cooperation cell under at least one interference combination to the jamming power of first cooperation cell, and other outside collaboration set Cell is defined as the first cooperation cell under at least one interference combination to the jamming power sum of first cooperation cell Interference information.

With reference to second of possible implementation of first aspect, in the third possible implementation of first aspect In, in addition to：The CSI-RS that user equipment configures according to each cooperation cell, it is determined that the down channel of each cooperation cell Information.

With reference to the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect In, user equipment calculates jamming power of other cells outside the collaboration set to the first cooperation cell, including：According to first The CSI-RS that the descending channel information of cooperation cell, the first cooperation cell are sent on the first running time-frequency resource, and user The first reference signal that equipment receives on first running time-frequency resource, determine other cells outside collaboration set to described first The interference information of cooperation cell.CQI measurement accuracy can so be improved.

With reference in a first aspect, in the 4th kind of possible implementation of first aspect, assisted in user equipment according to each Make the descending channel information of interference information and each cooperation cell of the cell under at least one interference combination, it is determined that often Before channel quality indicator (CQI) of the individual cooperation cell in the interference combination under every kind of interference combination, in addition to：User Equipment obtains the power that each cooperation cell in collaboration set sends data in next dispatching cycle；It is if it is determined that small in the presence of the 4th cooperation Area, which is sent in next dispatching cycle between the power of data and the reference signal power of the 4th cooperation cell, has power Difference, user equipment adjust the reference signal power of the 4th cooperation cell；User equipment is by the ginseng of the 4th cooperation cell after adjustment Examine signal power and be defined as the 4th cooperation cell to remaining association in the collaboration set in addition to the 4th cooperation cell Make the jamming power of cell.Because accurate CQI is the CSI-RS based on next dispatching cycle, so by adjusting each cooperation Cell sends the power of data with next dispatching cycle, can accurately obtain the interference information that each cooperation cell receives, And improve CQI measurement accuracy.

With reference in a first aspect, in the 5th kind of possible implementation of first aspect, in addition to：User equipment receives association Make the first configured information that the serving cell in collecting is sent；It is at least one that first configured information is used for instruction user device measuring Interference information under interference combination, first configured information include at least one interference and combined, and the interference combination includes association Make at least one cooperation cell configuration in the CSI-IM resource and collaboration set of the configuration of any one cooperation cell in collecting The combination of CSI-IM resources.So base station only needs to tell user equipment specifically to measure any CSI-IM moneys by configured information CQI under the combination of source, so as to reduce the expense of CSI-IM resources.

With reference to first aspect to first aspect the 5th kind of possible implementation in any one possible implementation, In the 6th kind of possible implementation of first aspect, the letter of each cooperation cell configuration in collaboration set is obtained in user equipment Before channel state information reference signal CSI-RS and at least one channel condition information interferometry CSI-IM resources, also wrap Include：User equipment obtains the first CSI-RS of each cooperation cell configuration and at least one channel condition information in collaboration set Interferometry CSI-IM resources, the current dispatching cycle that first CSI-RS includes each cooperation cell are pre-configured CSI-RS；Wherein, the pre-configured CSI-RS of the current dispatching cycle of different cooperation cells is configured in different CSI processes； User equipment measures the channel condition information CSI of each cooperation cell according to the first CSI-RS；One cooperation cell CSI include the pre-coding matrix PMI and order instruction RI of the cooperation cell；Serving cell hair of the user equipment into collaboration set The channel condition information CSI of each cooperation cell is sent, to cause in the collaboration set belonging to each cooperation cell is respectively Base station obtains the CSI-RS after each cooperation cell precoding according to the channel condition information of each cooperation cell, wherein, prelist The beam direction that CSI-RS after code sends data with cooperation cell in next dispatching cycle is consistent.

With reference to the 6th kind of possible implementation of first aspect to first aspect, the 7th kind in first aspect is possible In implementation, a CSI-IM resource includes at least one resource element RE, belongs to the resource element of same CSI-IM resources Plain RE has identical mark, and the mark for belonging to the resource element RE of different CSI-IM resources is different；Methods described also includes： User equipment receives the second configured information that the serving cell in collaboration set is sent, and second configured information includes each CSI-IM The numbering of resource, second configured information are used to indicate at least one resource element RE in numbering identical CSI-IM resources Signal power take the average power as the CSI-IM resources., so can be more because the power on each RE is different Add the mean power for accurately obtaining each CSI-IM resources.

With reference to the 7th kind of possible implementation of first aspect to first aspect, the 8th kind in first aspect is possible Also include in implementation：Serving cell into the collaboration set sends each cooperation cell at least one interference group Channel quality indicator (CQI) in conjunction under every kind of interference combination.Base station can be so caused to obtain every kind of CSI- in time Each cooperate small CQI under IM resources, and is set according to CQI of each cooperation cell under every kind of CSI-IM resources for user Alternative suitable resource accordingly.

Second aspect, the embodiment of the present invention also provide the determination method of CQI a kind of, including：Each to be cooperated in collaboration set Cell configuration channel state information reference signals CSI-RS and at least one channel condition information interferometry CSI-IM moneys Source；First configured information is used to indicate the interference information under at least one interference combination of the user equipment measurement, described First configured information includes at least one interference and combined, and the interference is combined as any at least one CSI-IM resources Combination；Receive each cooperation cell every kind of institute at least one interference combination in the collaboration set that user equipment is sent State the channel quality indicator (CQI) under interference combination.

With reference to second aspect, in the first possible implementation of second aspect, in addition to：Sent to user equipment The second configured information, second configured information includes the numbering of each CSI-IM resources, and second configured information is used for Instruction user equipment using the signal power in numbering identical CSI-IM resources at least one resource element RE take it is average as The power of the CSI-IM resources.

With reference to second aspect, in second of possible implementation of second aspect, in addition to：

The channel condition information CSI for each cooperation cell that user equipment is sent is received, wherein, a cooperation cell CSI include the pre-coding matrix PMI and order instruction RI of the cooperation cell；Obtained according to the CSI of each cooperation cell CSI-RS after precoding corresponding to each cooperation cell；Wherein, the CSI-RS after the precoding of a cooperation cell with The beam direction that the cooperation cell sends data in next dispatching cycle is consistent；According to the precoding of each cooperation cell CSI-RS afterwards is the CSI-RS after precoding corresponding to each cooperation cell configuration, so as to obtain user equipment according to each CSI-RS after precoding corresponding to the cooperation cell configuration, each cooperation cell is calculated under at least one interference combination Interference information.

The third aspect, the embodiment of the present invention provide a kind of user equipment, including：

Acquiring unit, for obtaining the channel state information reference signals CSI-RS of each cooperation cell configuration in collaboration set Resource and at least one channel condition information interferometry CSI-IM resources；Computing unit, for being matched somebody with somebody according to each cooperation cell The CSI-RS put, calculate interference information of each cooperation cell under at least one interference combination；Wherein, the interference group Any combination being combined at least one CSI-IM resources；First determining unit, for according to each cooperation cell extremely The descending channel information of interference information and each cooperation cell under a kind of few interference combination, it is determined that each cooperation cell Channel quality indicator (CQI) in the interference combination under every kind of interference combination.

With reference to the third aspect, in the first possible implementation of the third aspect, each cooperation cell configuration CSI-RS is the CSI-RS after precoding, and the CSI-RS after the precoding is with the cooperation cell in next scheduling The beam direction that cycle sends data is consistent.

With reference to the third aspect, in second of possible implementation of the third aspect, for the first cooperation cell, this One cooperation cell is that any one cooperation cell in all cooperation cells, computing unit include in collaboration set：First calculates mould Block, for the CSI-RS configured according to the first cooperation cell, calculate in the collaboration set except first cooperation cell it Remaining outer cooperation cell, to the jamming power of first cooperation cell under at least one interference combination；Second meter Module is calculated, for calculating jamming power of other cells outside the collaboration set to first cooperation cell；Determine mould Block, for by remaining cooperation cell in the collaboration set in addition to first cooperation cell at least one interference group To the jamming power of first cooperation cell under conjunction, and other cells outside the collaboration set are small to the described first cooperation The jamming power sum in area, it is defined as interference information of first cooperation cell under at least one interference combination.

With reference to second of possible implementation of the third aspect, in the third possible implementation of the third aspect In, user equipment also includes the second determining unit, and the second determining unit is specifically used for：The CSI- configured according to each cooperation cell RS resources, it is determined that the descending channel information of each cooperation cell.

With reference to the third possible implementation of the third aspect, in the 4th kind of possible implementation of the third aspect In, second computing module is specifically used for：According to the descending channel information of the first cooperation cell, the first cooperation cell first The CSI-RS sent on running time-frequency resource, and the first reference signal that user equipment receives on the first running time-frequency resource, really Determine interference information of other cells outside collaboration set to first cooperation cell.

With reference to the third aspect, in the 5th kind of possible implementation of the third aspect, the user equipment also includes adjusting Whole unit, the adjustment unit are specifically used for：Obtain the work(that each cooperation cell in collaboration set sends data in next dispatching cycle Rate；If it is determined that the power of data and the reference signal of the 4th cooperation cell are sent in next dispatching cycle in the presence of the 4th cooperation cell Difference power between power be present, then adjust the reference signal power of the 4th cooperation cell；By the 4th cooperation cell after adjustment Reference signal power is defined as the 4th cooperation cell to remaining cooperation cell in collaboration set in addition to the 4th cooperation cell Jamming power.

With reference to the third aspect, in the 6th kind of possible implementation of the third aspect, the user equipment also includes first Receiving unit, first receiving unit are used for：Receive the first configured information that the serving cell in the collaboration set is sent；It is described First configured information is used to indicate the interference information under at least one interference combination of the user equipment measurement, first instruction Information includes at least one interference and combined, and the interference combination includes any one of interior any one cooperation cell configuration of collaboration set Combination in individual CSI-IM resources and collaboration set between any one CSI-IM resource of at least one cooperation cell configuration.

With reference to the third aspect to the third aspect the 5th kind of possible implementation in any one possible realization side Formula, in the 7th kind of possible implementation of the third aspect, the user equipment also includes first acquisition unit, measuring unit and One transmitting element, wherein, the first acquisition unit is used for：Obtain first of each cooperation cell configuration in the collaboration set CSI-RS and at least one CSI-IM resources, first CSI-RS include the current scheduling week of each cooperation cell Phase pre-configured CSI-RS；Wherein, the pre-configured CSI-RS of the current dispatching cycle of different cooperation cells is configured in difference CSI processes；The measuring unit is used for, and the channel condition information of each cooperation cell is measured according to the first CSI-RS CSI；The CSI of one cooperation cell includes the pre-coding matrix PMI and order instruction RI of the cooperation cell；First transmission is single Member, the channel condition information CSI of each cooperation cell is sent for the serving cell into the collaboration set, to cause The base station in collaboration set belonging to each cooperation cell difference is stated to be obtained often according to the channel condition information of each cooperation cell CSI-RS after individual cooperation cell precoding, wherein, the CSI-RS after precoding is with the cooperation cell in next dispatching cycle The beam direction for sending data is consistent.

With reference to the third aspect to the third aspect the 7th kind of possible implementation in any one possible implementation, One CSI-IM resource includes at least one resource element RE, belong to the resource element RE of same CSI-IM resources have it is identical Mark, it is different to belong to the resource element RE of different CSI-IM resources mark, the user equipment also include second receive it is single Member, second receiving unit are specifically used for：Receive the second configured information that serving cell in the collaboration set is sent, described the Two configured informations include the numbering of each CSI-IM resources, and second configured information is used to indicate numbering identical CSI-IM Signal power in resource at least one resource element RE takes the average power as the CSI-IM resources.

With reference to the third aspect to the third aspect the 8th kind of possible implementation in any one possible implementation, The user equipment also includes the second transmitting element, and second transmitting element is specifically used for：Serving cell into the collaboration set Send channel quality indicator (CQI) of each cooperation cell at least one interference combination under every kind of interference combination.

Fourth aspect, the embodiment of the present invention provide a kind of base station, including：Dispensing unit, for each to be assisted in collaboration set Make cell configuration channel state information reference signals CSI-RS and at least one channel condition information interferometry CSI-IM Resource；First transmitting element, for sending the first configured information to user equipment, first configured information is described for indicating Interference information under at least one interference combination of user equipment measurement, first configured information include at least one interference group Close, the interference is combined as any combination at least one CSI-IM resources；First receiving unit, for receiving user Each cooperation cell is under every kind of interference combination during at least one interference is combined in the collaboration set that equipment is sent Channel quality indicator (CQI).

First configured information includes group of each cooperation cell under different CSI-IM resources in the collaboration set Close.

With reference to fourth aspect, in the first possible implementation of fourth aspect, the base station also includes：Second hair Unit is sent, for the second configured information sent to the user equipment, second configured information provides including each CSI-IM The numbering in source, second configured information are used for instruction user equipment by least one resource in numbering identical CSI-IM resources Signal power in elements RE takes the average interference as the CSI-IM resources.

With reference to fourth aspect, in second of possible implementation of fourth aspect, the dispensing unit is additionally operable to：For Each cooperation cell configures the first channel condition information CSI-RS and at least one CSI-IM moneys in the collaboration set Source, so as to obtain the channel condition information CSI that user equipment measures each cooperation cell according to first CSI-RS.

With reference to fourth aspect, in the third possible implementation of fourth aspect, the base station also includes：Second connects Unit is received, for receiving the channel condition information CSI of each cooperation cell by the serving cell in the collaboration set, its In, the CSI of a cooperation cell includes the pre-coding matrix PMI and order instruction RI of the cooperation cell；Acquiring unit, for root The CSI-RS after precoding corresponding to each cooperation cell is obtained according to the CSI of each cooperation cell；Wherein, an association It is consistent in the beam direction of transmission next dispatching cycle data with the cooperation cell to make the CSI-RS after the precoding of cell；The Three transmitting elements, it is each cooperation cell configuration pair for the CSI-RS after the precoding according to each cooperation cell The CSI-RS after precoding is answered, so as to obtain the CSI- after user equipment precoding according to corresponding to each cooperation cell configuration RS, calculate interference information of each cooperation cell under at least one interference combination.

5th aspect, the embodiment of the present invention provide a kind of user equipment, including：Processor, memory, system bus and logical Believe interface；

The memory is used to store computer executed instructions, and the processor is total by the system with the memory Line connects, when the user equipment is run, the computer executed instructions of memory storage described in the computing device, CQI described in a manner of making the user equipment execution such as any one of above-mentioned first aspect or first aspect optional is true Determine method.

6th aspect, the embodiment of the present invention provides a kind of computer-readable recording medium, including computer executed instructions, when user equipment Described in computing device during computer executed instructions, the user equipment performs times such as above-mentioned first aspect or first aspect The CQI described in a kind of optional mode that anticipates determines method.

7th aspect, the embodiment of the present invention provide a kind of base station, including：Processor, memory, system bus and communication connect Mouthful；

The memory is used to store computer executed instructions, and the processor is total by the system with the memory Line connects, when the base station is run, the computer executed instructions of memory storage described in the computing device, so that The CQI that the base station performs as described in the optional mode of any one of above-mentioned second aspect or second aspect determines method.

Eighth aspect, the embodiment of the present invention provides a kind of computer-readable recording medium, including computer executed instructions, when the processing of base station When device performs the computer executed instructions, the base station is performed as any one of above-mentioned second aspect or second aspect can Select the resource indicating method described in mode.

9th aspect, the embodiment of the present invention provide a kind of communication system, and the communication system includes multiple user equipmenies and base Stand, the plurality of user equipment can be the user described in any one optional mode of the above-mentioned third aspect or the third aspect Equipment, and the base station can be the base station described in any one optional mode of above-mentioned fourth aspect or fourth aspect； Or

The plurality of user equipment can be the user equipment described in the above-mentioned 5th aspect, and the base station can be above-mentioned the Base station described in seven aspects.

Optionally, above-mentioned user equipment can also include the computer-readable recording medium described in the 6th aspect, and above-mentioned base station can also wrap Include the computer-readable recording medium described in eighth aspect.

User equipment, base station and communication system provided in an embodiment of the present invention, method is determined by using above-mentioned CQI, Base station can be that each cooperation cell configures a CSI-RS and at least one CSI-IM resources in same process, so that Obtaining user not only can be according under a CSI-RS and the every kind of CSI-IM resources of at least one CSI-IM Resource Calculations Channel condition information CSI, at the same can also disturb the CSI-IM resource of any one cooperation cell indicated in combination and Combination between any one CSI-IM resource of at least one cooperation cell configuration determines every at least one interference combination The channel quality indicator (CQI) of each cooperation cell under kind of interference combination, due in the prior art, when measuring CQI, same CSI Process CSI-RS is configured in a subframe with CSI-IM resources, is so utilized when the quantity of cooperation cell is bigger CSI-IM resource measurements interference expense be significantly increased with the increase of cooperation cell, therefore the embodiment of the present invention it is same enter Journey is that each cooperation cell configures a CSI-RS and at least one CSI-IM resources, and it is dry to be multiplexed CSI-RS calculating Information is disturbed to determine CQI, the expense of CSI-IM resources can be saved when the quantity of cooperation cell is bigger.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.

Fig. 1 a are the application scenario diagram that a kind of CQI provided in an embodiment of the present invention determines method；

Fig. 1 b are the CSI-RS and CSI-IM that scene in the prior art according to Fig. 1 a is user device configuration Resource distribution schematic diagram；

Fig. 1 c are the CSI-RS and CSI- that scene of the embodiment of the present invention according to Fig. 1 a is user device configuration IM resource distribution schematic diagrames；

Fig. 2 is the structural representation that a kind of CQI provided in an embodiment of the present invention determines base station in method；

Fig. 3 is the baseband subsystems structural representation that a kind of CQI provided in an embodiment of the present invention determines base station in method；

Fig. 4 is the schematic flow sheet one that a kind of CQI provided in an embodiment of the present invention determines method；

Fig. 5 a are the application scenarios schematic diagram that a kind of CQI provided in an embodiment of the present invention determines method；

Fig. 5 b are the CSI-RS and CSI-IM that scene of the embodiment of the present invention according to Fig. 1 is user device configuration Resource distribution schematic diagram；

Fig. 6 is the schematic flow sheet two that a kind of CQI provided in an embodiment of the present invention determines method；

Fig. 7 is the schematic flow sheet three that a kind of CQI provided in an embodiment of the present invention determines method；

Fig. 8 is the schematic flow sheet four that a kind of CQI provided in an embodiment of the present invention determines method；

Fig. 9 is the schematic flow sheet five that a kind of CQI provided in an embodiment of the present invention determines method；

Figure 10 is the schematic flow sheet six that a kind of CQI provided in an embodiment of the present invention determines method；

Figure 11 is a kind of structural representation one of user equipment provided in an embodiment of the present invention；

Figure 12 is a kind of structural representation two of user equipment provided in an embodiment of the present invention；

Figure 13 is a kind of structural representation three of user equipment provided in an embodiment of the present invention；

Figure 14 is a kind of structural representation one of base station provided in an embodiment of the present invention；

Figure 15 is a kind of structural representation two of base station provided in an embodiment of the present invention；

Figure 16 is a kind of hardware architecture diagram of user equipment provided in an embodiment of the present invention；

Figure 17 is a kind of hardware architecture diagram of base station provided in an embodiment of the present invention.

Embodiment

As shown in Figure 1a for the application scenarios of the embodiment of the present invention, N number of cooperation cell (cooperation cell in the application scenarios 1st, cooperation cell 2 and cooperation cell 3 ... cooperation cell N) form a collaboration set, wherein, collaboration set refer to it is simultaneously direct or Participate in the set of the multiple cells of the user data transmission indirectly, the cell in the collaboration set includes serving cell and some participations The cooperation cell of cooperation.Enter row information by a scheduler between some cooperation cells for participating in cooperation and serving cell to hand over Mutually, for example, the serving cell obtains the configured information that each cooperation cell sends to user equipment by scheduler, and pass through Base station belonging to from scheduler to each cooperation cell difference sends the CSI and CQI of user equipment measurement.It is each in the collaboration set Cooperation cell is serviced in a manner of Comp for UE.

In the prior art, when serving cell sends CSI request, the CSI-RS and CSI-IM of same CSI processes Resource is configured in a subframe.UE is using the channel condition information of non-zero power (NZP, Non-zero Power) with reference to letter Number (CSI-RS, Channel State Information-Reference Signal) measure channel state information (CSI, Channel State Information), measure interference information using CSI-IM (interferometry resource).UE is by measuring Channel information and interference information calculate and be quantified as pre-coding matrix instruction (PMI, Precoding Matrix Indicator), order instruction (RI, Rank Indication) and channel quality instruction (CQI, Channel Quality Indicator) and serving cell is fed back to.When user equipment needs to measure CQI, base station is that each cooperation cell configures one Channel condition information interferometry CSI-IM resources, when measuring other cooperation cells to the interference information of cooperation cell, One cell configuration is IMR, and other cells send data.

Exemplary, as shown in Figure 1 b, when UE measures the CQI of each cooperation cell, it is small that base station is necessary for each cooperation Area configures a channel condition information interferometry CSI-IM resource, and when there is 3 cooperation cells in collaboration set, 3 cooperations are small Area shares 12 kinds of CSI-IM resources in CoMP scenes, still, when cooperation cell quantity is more, different CSI-IM resources Under, same cooperation cell may receive different interference informations, due to when the quantity of cooperation cell is N, sharing N2^N ^-1CSI-IM resources, therefore, the expense using CSI-IM resource measurement interference informations significantly increase with the increase of cooperation cell Add.The embodiment of the present invention by obtaining the channel state information reference signals CSI-RS of each cooperation cell in collaboration set, As illustrated in figure 1 c, according to the CSI-RS after each cooperation cell precoding, each cooperation cell is calculated at least one institute State the interference information under CSI-IM resources；According to interference information of each cooperation cell under at least one CSI-IM resources And the descending channel information of each cooperation cell, it is determined that each cooperation cell is every kind of at least one CSI-IM resources Channel quality indicator (CQI) under the CSI-IM resources.So interference information is calculated by being multiplexed CSI-RS so that CSI- RS expense does not increase with the increase of interference hypothesis.

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

For the ease of clearly describing the technical scheme of the embodiment of the present invention, in an embodiment of the present invention, employ " the One ", the printed words such as " second " make a distinction to function and the essentially identical identical entry of effect or similar item, and those skilled in the art can To understand that the printed words such as " first ", " second " are not defined to quantity and execution order.

Technical scheme provided in an embodiment of the present invention can apply to various cordless communication networks, such as：The whole world is mobile logical Believe (global system for mobile communication, referred to as GSM) system, CDMA (code Division multiple access, referred to as CDMA) system, WCDMA (wideband code division Multiple access, referred to as WCDMA) system, universal mobile communications (universal mobile Telecommunication system, referred to as UMTS) system, GPRS (general packet Radio service, referred to as GPRS) system, Long Term Evolution (long term evolution, referred to as LTE) system, elder generation Long Term Evolution (long term evolution advanced, referred to as LTE-A) system for entering, global interconnection inserting of microwave (worldwide interoperability for microwave access, referred to as WiMAX) system etc..Term " net Network " and " system " can be replaced mutually.

Term " network " and " system " can be replaced mutually.

Wireless terminal is referred to as system, subscri er unit (Subscriber Unit), subscriber station (Subscriber Station), movement station (Mobile Station), mobile station (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent) or user equipment.

Wherein, in embodiments of the present invention, base station (base station, referred to as BS) can be with UE (user equipment, User Equipment) or other communication sites such as relay, the equipment to be communicated, base station specific physical areas can be provided The communication overlay in domain.For example, base station can be specifically base transceiver station (the Base Transceiver in GSM or CDMA Station, referred to as BTS) or base station controller (Base Station Controller, referred to as BSC)；Can also be Radio network controller (the Radio Network in node B (Node B, referred to as NB) or UMTS in UMTS Controller, referred to as RNC)；Can also be in LTE evolved base station (envoled Node B, referred to as eNB or eNodeB)；Or or cordless communication network in offer access service other access network equipments, the present invention implement Example does not limit.

Wherein, the base station in the embodiment of the present invention, as shown in Fig. 2 base station eNodeB includes baseband subsystems, middle radio frequency System, antenna feeder subsystem and some supporting constructions (for example, complete machine subsystem), wherein, baseband subsystems are used to realize whole base The Operation and Maintenance stood, realize signaling processing, Radio Resource principle, to EPC (Evolved Packet Core, packet-based core networks) Coffret, realize LTE physical layers, MAC (Medium Access Control, medium access control) layer, L3 signalings, behaviour Make maintenance master control function；Middle Radio Frequency Subsystem realizes the conversion between baseband signal, intermediate-freuqncy signal and radiofrequency signal, realizes LTE The demodulation of wireless reception of signals sends the modulation and power amplification of signal；Antenna feeder subsystem includes being connected to base station radio frequency module Antenna and feeder line and GRS receive the antenna and feeder line of card, for realizing the reception and transmission of radio open signal；Complete machine System, it is the support section of baseband subsystems and intermediate frequency subsystem, there is provided structure, power supply and environment monitoring function.

Wherein, baseband subsystems can be as shown in Figure 3：For example, surfing Internet with cell phone is needed by base station core network access (MME/ S-GW), internet is being accessed by core net, the wherein data of internet are transmitted by the interface between core net and base station To baseband portion, baseband portion carries out the processing such as PDCP, RLC, MAC layer, coding, modulation, gives radio frequency part and be transmitted to terminal. It can be connected between base band and radio frequency by CPRI interfaces；In addition, radio frequency part at present can be by fiber optic stretch, such as zoom out RRU.Each step base band of collocation method in the embodiment of the present invention is realized by radio frequency, while receives forwarding step Realized by antenna (for example, air interface).

Interface during the present invention is implemented between the user equipment that is related to and base station can be understood as user equipment and base station it Between the air interface that is communicated, or be referred to as Uu interfaces.

In embodiments of the present invention, UE can be distributed in whole wireless network, and each UE can be static or mobile 's.UE, can be that wireless terminal can also be catv terminal, wireless terminal can only provide a user voice and/or data Connective equipment, the portable equipment with wireless connecting function or other processing for being connected to radio modem are set It is standby.Wireless terminal can be led to through RAN (Radio Access Network, wireless access network) with one or more core nets Letter, wireless terminal can be mobile terminal, as mobile phone (or be " honeycomb " phone) and have mobile terminal computer, For example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they and wireless access Net exchanges language and/or data.For example, PCS (Personal Communication Service, PCS) is electric Words, wireless phone, Session initiation Protocol (SIP) phone, WLL (Wireless Local Loop, WLL) stand, PDA Equipment such as (Personal Digital Assistant, personal digital assistants).UE is properly termed as terminal (terminal), mobile Platform (mobile station), subscriber unit (subscriber unit), platform (station) etc..UE can be cell phone (cellular phone), personal digital assistant (personal digital assistant, PDA), radio modem (modem), Wireless Telecom Equipment, handheld device (handheld), laptop computer (laptop computer) etc..When UE should When being communicated for M2M modes, UE is properly termed as M2M terminals, can be specifically intelligent electric meter, the intelligent appliance for supporting M2M communication Deng.The present invention does not limit.

As shown in figure 4, the embodiment of the present invention, which provides a kind of CQI, determines method, as shown in figure 4, including：

S401, base station are for each cooperation cell configurating channel state information reference signals CSI-RS in collaboration set and extremely A few channel condition information interferometry CSI-IM resource；

S402, user equipment obtain the channel state information reference signals CSI-RS of each cooperation cell in collaboration set With at least one channel condition information interferometry CSI-IM resources；

S403, base station send the first configured information to user equipment, and first configured information is used to indicate that the user sets The standby interference information measured under at least one interference combination, first configured information includes at least one interference and combined, described Interference is combined as any combination at least one CSI-IM resources；

S404, user equipment receive the first configured information that base station is sent；

S405, user equipment are according to indicating in the CSI-RS of each cooperation cell and first configured information At least one interference combination, calculate interference letter of each cooperation cell at least one interference combination under every kind of interference combination Breath；

S406, the user equipment are disturbed under combination according to each cooperation cell is every kind of at least one interference combination Interference information and the descending channel information of each cooperation cell, it is determined that each cooperation cell every kind of institute in the interference combination State the channel quality indicator (CQI) under interference combination.

The embodiment of the present invention provides a kind of CQI and determines method, by small each to cooperate in same process according to base station A CSI-RS and at least one CSI-IM resources for area's configuration, can be according at least one interference so as to obtain user equipment Any one CSI-IM resource and association that any one cooperation cell configures in the collaboration set of every kind of interference combination instruction in combination Make to collect the combination between any one CSI-IM resource of interior at least one cooperation cell configuration, determine every under every kind of interference combination The interference information of individual cooperation cell, and according to each cooperation cell it is at least one it is described interference combination under interference information and The descending channel information of each cooperation cell, it is determined that each cooperation cell is every kind of described dry at least one interference combination Disturb the lower channel quality indicator (CQI) of combination, due in the prior art, when measuring CQI, same CSI processes CSI-RS and CSI-IM resources are configured in a subframe, are done so when the quantity of cooperation cell is bigger using CSI-IM resource measurements The expense disturbed is significantly increased with the increase of cooperation cell, therefore the embodiment of the present invention is each cooperation cell in same process A CSI-RS and at least one CSI-IM resources are configured, and multiplexing CSI-RS is combined according to interference and calculates interference letter Breath can save the expense of CSI-IM resources to determine CQI when the quantity of cooperation cell is bigger.

Wherein, first configured information includes at least one interference combination, and the interference combination includes appointing in collaboration set The CSI-IM resources of at least one cooperation cell configuration in the CSI-IM resource and collaboration set of one cooperation cell configuration of meaning Combination.

Wherein, the embodiment of the present invention can be carried out as needed to the particular number of the interference combination without limiting Selection is set, generally, because the quantity of interference combination can be by the quantity of cooperation cell in collaboration set according to formula N·2^N-1It is determined that therefore each CSI-IM resources for disturbing the cooperation cell configuration indicated in combination and another cooperation cell Combination between the CSI-IM resources of configuration can be configured as needed.

The embodiment of the present invention is not only limited specific cooperation cell number in the collaboration set, the number of the cooperation cell Can be that more than 3, or 3 present invention is implemented to this without limiting.

Exemplary, there are 3 cooperation cells, respectively Cell1, Cell2 and Cell3 in collaboration set, wherein, Cell1 matches somebody with somebody The numbering for the CSI-IM resources put is respectively CSI-IM1-1, CSI-IM1-2, CSI-IM1-3；The CSI-IM resources of Cell2 configurations Numbering be respectively that the numbering of CSI-IM resources of CSI-IM2-1, CSI-IM2-2, CSI-IM2-3 and Cell3 configuration is respectively CSI-IM3-1, CSI-IM3-2, CSI-IM3-3, so, interference combination include 12 kinds of possible situations, and the present invention is implemented herein Example is not just listed in detail, exemplary, and to obtain interference information of remaining cooperation cell to Cell1, interference combination can be with For：CSI-IM1-1 and CSI-IM1-2, CSI-IM1-2 and CSI-IM1-3, CSI-IM1-1 and CSI-IM1-3 and CSI-IM1- 1、CSI-IM1-2、CSI-IM1-3。

Wherein, user equipment can be configured by the high-level signaling of cooperation cell in S402, such as RRC (Radio Resource Control, wireless heterogeneous networks) signaling obtains the channel condition information reference of each cooperation cell in collaboration set Signal CSI-RS.

Specifically, UE sends signal by up-link to base station, wherein, the signal is to include data, life for transmitting The carrier of all kinds information such as order and message, the signal that UE is sent by down-link reception base station.

In a kind of possible implementation of the embodiment of the present invention, CSI-RS uses precoding in the embodiment of the present invention CSI-RS afterwards, the CSI-RS after the precoding send data with the cooperation cell in next dispatching cycle Beam direction is consistent.

Only it is exemplary, for the embodiment of the present invention only by taking the 3rd cooperation cell as an example, how introduction passes through CSI-RS Obtain the CSI-RS after the precoding of each cooperation cell.

Specifically, 1, UE obtain shared by the pre-configured CSI-RS of the 3rd cooperation cell current dispatching cycle when Frequency resource；

2nd, the first ginseng that the base station that user equipment is received on the running time-frequency resource belonging to the 3rd cooperation cell is sent Examine signal；First reference signal is the pre-configured CSI-RS of first cooperation cell current dispatching cycle by described the Signal after the channel of one cooperation cell；

3rd, user equipment is according to first reference signal, the CSI of acquisition the 3rd cooperation cell；Wherein, described The CSI of three cooperation cells includes the first pre-coding matrix PMI and order instruction RI of the 3rd cooperation cell.

4th, the CSI of the 3rd cooperation cell is sent to base station by user equipment；

5th, base station obtains and the described 3rd association according to the PMI of the 3rd cooperation cell, in the code book to be prestored from database Make the closest matrix PMI1 of the PMI channel matrixes of cell；SVD decomposition is carried out to channel matrix H 1, judged according to characteristic value RI1；

6th, according to pre-coding matrix PMI1 and using with data identical pre-coding matrix to CSI-RS carry out wave beam into Type, obtain the CSI-RS after the 6th cooperation cell cooperation cell precoding.

Because the CQI that current dispatching cycle measures in the prior art is what the PMI based on current dispatching cycle was measured, and Accurate CQI should the PMI based on next dispatching cycle, UE is by CSI-RS measure channel state information CSI and to service Cell feeds back PMI, and serving cell will use PMI to be sent after carrying out precoding to CSI-RS, and be formed at data identical ripple Shu Fangxiang, the embodiment of the present invention utilize CSI-RS this characteristic identical with the beam direction of data after precoding, are multiplexed CSI- RS Resource Calculation interference informations so that CSI-RS expense does not increase with the increase of interference hypothesis.Therefore the embodiment of the present invention is adopted With the CSI-RS after precoding, CQI measurement accuracy so can be further improved.

Optionally, due to for each cooperation cells of UE in the collaboration set under at least one CSI-IM resources The mode of interference information is identical with principle, therefore the embodiment of the present invention only illustrates by taking the first cooperation cell as an example, and does not have Any indicative implication, exemplary, the S405 can specifically be accomplished by the following way：

S4051, the CSI-RS configured according to first cooperation cell, calculate and described first are removed in the collaboration set Remaining cooperation cell outside cooperation cell, the interference under at least one interference combination to first cooperation cell Power；

Wherein, the S4051 can specifically be realized by following steps：

S40511, the CSI-RS sent according to the descending channel information of each cooperation cell and each cooperation cell are provided Source, it is determined that the reference signal power of each cooperation cell.

Exemplary, formula I can be passed through_i=| H_i·X_i|², wherein, I_iFor the reference signal work(of i-th of cooperation cell Rate.

When the reference signal power of each cooperation cell being defined as into cooperation cell transmission data in the embodiment of the present invention, To the jamming power of remaining cooperation cell in collaboration set.Such as I₁It can be considered when cell 1 sends data to cell 2 and cell 3 Jamming power.

S40512, combined according to the reference signal power of each cooperation cell and at least one interference instruction it is described extremely It is combined and determines in a few CSI-IM resource, in the collaboration set that each cooperation cell receives in addition to the cooperation cell Remaining cooperation cell to the jamming power of the cooperation cell.

Exemplary, scene as shown in Figure 5 a, when 3 cooperation cells in collaboration set be present, during the present invention is implemented Interference hypothesis includes 12 kinds of examples as shown in table 1.If the reference signal work(of cooperation cell 1, cooperation cell 2 and cooperation cell 3 Rate is respectively I₁、I₂And I₃, the configuration of each cooperation cell is as shown in Figure 5 b.

, wherein it is desired to explanation, the CSI-IM of a cooperation cell configuration is used to measure this in other cooperation cells The CSI of cooperation cell.If the CSI-IM resources in the Cell1 in Fig. 5 b are the ZP that is configured for measuring Cell2 cells CSI CSI-RS and ZP (zero energy, the Zero Power) CSI-RS configured for measurement Cell3 cells CSI.It is therefore dry in the Cell1 It can be the ZP CSI-RS that are configured for measuring Cell2 cells CSI to disturb combination, or for measuring Cell3 cells CSI and the ZP CSI-RS configured, can also be simultaneously for for measuring ZP CSI-RS and the use that Cell2 cells CSI is configured In the ZP CSI-RS that measurement Cell3 cells CSI is configured.Configured in each cooperation cell for the ZP that measures CSI and configure CSI-RS reference power can be as cooperation cell interference to other cooperation cells when other cells send data Power.

13 cooperation cell DPS/DPB interference hypothesis examples of table

When CSI-IM resources are the interference hypothesis 1 shown in table 1, then cooperation cell 2 and cooperation cell 3 are small to the cooperation The jamming power in area 1 is P1=I₂+I₃；When CSI-IM resources are the interference hypothesis 2 shown in table 1, then cooperation cell 2 and cooperation Cell 3 is P1=I to the jamming power of the cooperation cell 1₂；When CSI-IM resources are the interference hypothesis 1 shown in table 1, then Cooperation cell 2 and cooperation cell 3 are P1=I to the jamming power of the cooperation cell 1₃。

It should be noted that in the embodiment of the present invention when the CSI-IM information of a cooperation cell configuration is DPB, then really The fixed cooperation cell is 0 to the jamming power of remaining the first cooperation cell in the collaboration set.By that can be obtained with upper type Go out in the collaboration set that 12 kinds of disturbances assume that each cooperation cell is subject under combination remaining cooperation cell to the cooperation cell Jamming power.

S4052, calculate jamming power of other cells outside the collaboration set to first cooperation cell；

Due to that when calculating the interference information that each cooperation cell is subject to, may there is other cells outside collaboration set To caused by any one cell in collaboration set interference, the embodiment of the present invention it is specific to S4052 obtain collaboration set outside other Cell is to the mode of the jamming power of first cooperation cell without limiting.

S4052 in the embodiment of the present invention can specifically be accomplished by the following way：

S40521, according to the descending channel information of first cooperation cell, first cooperation cell in the first time-frequency The CSI-RS sent in resource, and the first reference signal that user equipment receives on first running time-frequency resource, really Determine interference information of other cells outside the collaboration set to first cooperation cell.

Exemplary, formula I can be passed through_out=| Y_i'-H_i·X_i|²Calculate collaboration set that each cooperation cell is subject to it The interference that remaining outer serving cell is brought, wherein, Y_i' for what is received on the first running time-frequency resource of i-th of cooperation cell CSI-RS, wherein, X_iRepresent the CSI-RS sent on the first running time-frequency resource of i-th of cooperation cell.Need , typically when CSI-RS is being sent in base station on one running time-frequency resource, user equipment receives on identical running time-frequency resource CSI-RS.

S4053, by remaining cooperation cell in the collaboration set in addition to first cooperation cell at least one institute State under interference combination to the jamming power of first cooperation cell, and other cells outside the collaboration set are to described the The jamming power sum of one cooperation cell, it is defined as interference letter of first cooperation cell under at least one interference combination Breath.

Exemplary, when CSI-IM resources are the interference hypothesis 1 shown in table 1, then cooperation cell 2 and cooperation cell 3 are right The jamming power of the cooperation cell 1 is P1=I₂+I₃, then cooperation cell 1 is in the interference vacation that CSI-IM resources are shown in table 1 If interference information when 1 is：P=P1+I_out, wherein, P1=I₂+I₃, I_outRemaining is assisted outside the collaboration set being subject to for cooperation cell 1 Make the jamming power of cell；

When CSI-IM resources are the interference hypothesis 2 shown in table 1, then cooperation cell 2 and cooperation cell 3 are small to the cooperation The jamming power in area 1 is P1=I₂；So interference letter of the cooperation cell 1 when CSI-IM resources are the interference hypothesis 2 shown in table 1 Cease and be：P=P1+I_out, wherein, P1=I₂, I_outThe interference work(of remaining cooperation cell outside the collaboration set being subject to for cooperation cell 1 Rate；

When CSI-IM resources are the interference hypothesis 3 shown in table 1, then cooperation cell 2 and cooperation cell 3 are small to the cooperation The jamming power in area 1 is P1=I₃；So interference letter of the cooperation cell 1 when CSI-IM resources are the interference hypothesis 3 shown in table 1 Cease and be：P=P1+I_out, wherein, P1=I₃, I_outThe interference work(of remaining cooperation cell outside the collaboration set being subject to for cooperation cell 1 Rate.

In a kind of implementation of the present invention, referring to Fig. 6, in addition to S407：

S407, the CSI-RS according to each cooperation cell, determine the descending channel information of each cooperation cell.

Wherein, the embodiment of the present invention determines each cooperation cell to the CSI-RS according to each cooperation cell Descending channel information mode without limit.

Exemplary, formula can be passed throughThe descending channel information of each cooperation cell, wherein, X_iAnd Y_i CSI-RS that respectively i-th of cooperation cell is sent on the first running time-frequency resource and received on the first running time-frequency resource CSI-RS, H_iThe channel information of CSI-RS experience when sending the CSI-RS for i-th of cooperation cell. Wherein, the first running time-frequency resource is any one running time-frequency resource in the cooperation cell.

When calculating the descending channel information of cooperation cell in collaboration set, the cooperation cell is on the first running time-frequency resource NZP (Non-zero Power non-zero powers) CSI-RS is configured to, remaining cooperation cell is in the first time-frequency in the collaboration set ZP (, Zero Power, zero energy) CSI-RS is configured in resource.Exemplary, as shown in Figure 5 a, the cooperation cell 1 NZP CSI-RSs are configured on running time-frequency resource, are in same with the cooperation cell 1 in cooperation cell 2 and cooperation cell 3 ZP CSI-RSs are configured on one running time-frequency resource.Calculate the mode and described first of the descending channel information of each cooperation cell The mode of cooperation cell is identical, and the embodiment of the present invention will not be repeated here.

It should be noted that the descending channel information that each cooperation cell is calculated in the embodiment of the present invention can be by prelisting CSI-RS after code can also pass through CSI-RS, it is preferred that after the embodiment of the present invention can be by precoding CSI-RS calculates the descending channel information of each cooperation cell, is then calculated according to by the CSI-RS after precoding Each cooperation cell descending channel information, obtain the service outside the reference signal power and collaboration set of each cooperation cell Cell can so improve CQI measurement accuracy to the jamming power of any one cooperation cell in the collaboration set.

In another implementation of the present invention, referring to Fig. 7, in addition to：S408-S411：

Each cooperation cell into collaboration set sends next transmission dispatching cycle data by serving cell for S408, base station Power；

S409, user equipment obtain the work(that each cooperation cell in the collaboration set sends data in next dispatching cycle Rate；

Wherein, the embodiment of the present invention obtains in the collaboration set each cooperation cell under to user equipment in the S409 The mode of the power of data is sent one dispatching cycle without limiting, can be belonging to user equipment from each cooperation cell difference Base station obtain or affiliated base station is transmitted directly to user by serving cell and set respectively for each cooperation cell It is standby.

S410, if it is determined that in the presence of the 4th cooperation cell next dispatching cycle send data power cooperated with the described 4th Difference power between the reference signal power of cell be present, then adjust the reference signal power of the 4th cooperation cell；

S411, the reference signal power of the 4th cooperation cell after adjustment is defined as the 4th cooperation cell pair The jamming power of remaining cooperation cell in the collaboration set in addition to the 4th cooperation cell.

Exemplary, if the reference signal power I of cooperation cell 1 be present₁Sent with cooperation cell 1 in next dispatching cycle The power I of data₁' difference power be present, then obtain difference power I=I₁-I₁', and it is small according to the difference power adjustment cooperation The reference signal power I in area 1₁。

In the implementation, the work(of data is sent in next dispatching cycle using each cooperation cell when calculating CQI Reference signal power of the rate as the cooperation cell, CQI measurement accuracy can be improved.

For the embodiment of the present invention to the form of first configured information without limiting, the first instruction message can be used After family equipment sends request to serving cell, it is that the base station of serving cell is sent or when cooperation cell sends CSI please When asking, base station is directly transmitted by serving cell.

In another implementation of the embodiment of the present invention, as shown in figure 8, also including：

S412, base station are the first CSI-RS of each cooperation cell configuration in collaboration set；The first CSI-RS moneys The pre-configured CSI-RS of current dispatching cycle of the source including each cooperation cell；Wherein, the current tune of different cooperation cells Cycle pre-configured CSI-RS is spent to configure in different CSI processes；

S413, the first CSI-RS for obtaining each cooperation cell configuration in the collaboration set,

S414, the channel condition information CSI according to each cooperation cell of first CSI-RS measurement；One The CSI of cooperation cell includes the pre-coding matrix PMI and order instruction RI of the cooperation cell；

S415, the serving cell into the collaboration set send the channel condition information CSI of each cooperation cell；

Channel shape of the affiliated base station according to each cooperation cell is distinguished in each cooperation cell in S415-1, the collaboration set CSI-RS after each cooperation cell precoding of state acquisition of information, wherein, the CSI-RS after precoding exists with the cooperation cell The beam direction that next dispatching cycle sends data is consistent.

In the implementation, it is the CSI-RS based on next dispatching cycle when calculating CQI, can so improves Measure CQI precision.

In the alternatively possible implementation of the embodiment of the present invention, as shown in figure 9, also including step S416：

S416, the second configured information that serving cell is sent in the collaboration set is received, second configured information includes The numbering of each CSI-IM resources, second configured information is used for instruction will be at least one in numbering identical CSI-IM resources Signal power on resource element RE takes the average power as the CSI-IM resources.

In this kind of implementation, because a CSI-IM resource includes at least one resource element RE, belong to same The resource element RE of CSI-IM resources has identical mark, belongs to the resource element RE mark of different CSI-IM resources not Together, still, due to the corresponding numbering of each CSI-IM resources, and each CSI-IM resource allocations include multiple RE units, use The jamming power that family equipment measures on each RE is different, therefore needs in the CSI-IM resources to same numbering on all RE Power is averaged, the power as CSI-IM resources.It so can further improve CQI measurement accuracy.

Wherein, the present invention is implemented to the form of identification of each CSI-IM resources without limiting, for example, it may be numbering, Numeral or letter.

Exemplary, the embodiment of the present invention also provides a kind of possible implementation, and as shown in Figure 10, methods described is also Including：

S417, by the serving cell in the collaboration set to each cooperation cell respectively belonging to base station send it is every Channel quality indicator (CQI) of the individual cooperation cell at least one CSI-IM resources under every kind of CSI-IM resources.

In this embodiment, base station can be caused to obtain each cooperation cell under every kind of CSI-IM resources in time CQI, and be the corresponding suitable money of user equipment selection according to CQI of each cooperation cell under every kind of CSI-IM resources Source.

As shown in figure 11, the embodiment of the present invention provides a kind of user equipment, and the user equipment is used to perform above method In user equipment performed by step.The user equipment can include the module corresponding to corresponding steps.Example, the use Family equipment includes：

Acquiring unit 10, for obtaining the channel state information reference signals CSI- of each cooperation cell configuration in collaboration set RS resources and at least one channel condition information interferometry CSI-IM resources；

Computing unit 11, for the CSI-RS configured according to each cooperation cell, each cooperation cell is calculated extremely A kind of few interference information disturbed under combination；Wherein, the interference is combined as any at least one CSI-IM resources Combination；

First determining unit 12, for the interference information according to each cooperation cell under at least one interference combination And the descending channel information of each cooperation cell, it is determined that each cooperation cell every kind of interference group in the interference combination Channel quality indicator (CQI) under closing.

The embodiment of the present invention provides a kind of CQI and determines method, by small each to cooperate in same process according to base station A CSI-RS and at least one CSI-IM resources for area's configuration, can be according at least one interference so as to obtain user equipment Any one CSI-IM resource and association that any one cooperation cell configures in the collaboration set of every kind of interference combination instruction in combination Make to collect the combination between any one CSI-IM resource of interior at least one cooperation cell configuration, determine every under every kind of interference combination The interference information of individual cooperation cell, and according to each cooperation cell it is at least one it is described interference combination under interference information and The descending channel information of each cooperation cell, it is determined that each cooperation cell is every kind of described dry at least one interference combination Disturb the lower channel quality indicator (CQI) of combination, due in the prior art, when measuring CQI, same CSI processes CSI-RS and CSI-IM resources are configured in a subframe, and CSI-IM resource measurements are utilized so when the quantity of cooperation cell is bigger The expense of interference is significantly increased with the increase of cooperation cell, therefore the embodiment of the present invention is small each to cooperate in same process Area configures a CSI-RS and at least one CSI-IM resources, and combines multiplexing CSI-RS according to interference and calculate interference Information can save the expense of CSI-IM resources to determine CQI when the quantity of cooperation cell is bigger.

The CSI-RS of each cooperation cell configuration is the CSI-RS after precoding in the embodiment of the present invention, and this is pre- The beam direction that CSI-RS after coding sends data with the cooperation cell in next dispatching cycle is consistent.

Optionally, for the first cooperation cell, first cooperation cell is any in all cooperation cells in collaboration set One cooperation cell.

Wherein, as shown in figure 12, computing unit 11 includes：

First computing module 1101, for the CSI-RS configured according to the first cooperation cell, calculate the collaboration set Interior remaining cooperation cell in addition to first cooperation cell, cooperated under at least one interference combination to described first The jamming power of cell；

Second computing module 1102, for calculating other cells outside the collaboration set to first cooperation cell Jamming power；

Determining module 1103, for remaining cooperation cell in the collaboration set in addition to first cooperation cell to be existed To the jamming power of first cooperation cell under at least one interference combination, and outside the collaboration set other are small Area is defined as first cooperation cell under at least one interference combination to the jamming power sum of first cooperation cell Interference information.

Optionally, as shown in figure 13, the user equipment also includes the second determining unit 13, and the second determining unit 13 is specific For：

The CSI-RS configured according to each cooperation cell, it is determined that the descending channel information of each cooperation cell.

Optionally, second computing module 1102 is specifically used for：According to the descending channel information of the first cooperation cell, The CSI-RS that one cooperation cell is sent on the first running time-frequency resource, and user equipment receive on the first running time-frequency resource First reference signal, determine interference information of other cells outside collaboration set to first cooperation cell.

Optionally, the user equipment also includes adjustment unit, and the adjustment unit is specifically used for：Obtain each in collaboration set Cooperation cell sends the power of data in next dispatching cycle；If it is determined that sent in the presence of the 4th cooperation cell in next dispatching cycle Difference power be present between the reference signal power of the power of data and the 4th cooperation cell, then adjust the reference of the 4th cooperation cell Signal power；The reference signal power of the 4th cooperation cell after adjustment is defined as the 4th cooperation cell to removing institute in collaboration set State the jamming power of remaining cooperation cell outside the 4th cooperation cell.

Optionally, the user equipment also includes the first receiving unit, and first receiving unit is used for：Receive the collaboration set The first configured information that interior serving cell is sent；First configured information is used to indicate the user equipment measurement at least one Interference information under kind interference combination, first configured information include at least one disturb and combined, and the interference combination includes At least one cooperation cell is matched somebody with somebody in any one CSI-IM resource and collaboration set of the configuration of any one cooperation cell in collaboration set Combination between any one the CSI-IM resource put.

Optionally, user equipment also includes first acquisition unit, measuring unit and the first transmitting element, wherein, described One acquiring unit is used for：Obtain the first CSI-RS of each cooperation cell configuration and at least one CSI- in the collaboration set IM resources, the pre-configured CSI-RS of current dispatching cycle of first CSI-RS including each cooperation cell；Its In, the CSI-RS that the current dispatching cycle of different cooperation cells is pre-configured is configured in different CSI processes；The measuring unit is used According to the channel condition information CSI of each cooperation cell of the first CSI-RS measurement；The CSI of one cooperation cell Pre-coding matrix PMI and order instruction RI including the cooperation cell；First transmitting element, for into the collaboration set Serving cell sends the channel condition information CSI of each cooperation cell, to cause each cooperation cell in the collaboration set After base station belonging to respectively obtains each cooperation cell precoding according to the channel condition information of each cooperation cell CSI-RS, wherein, the CSI-RS after precoding sends the beam direction one of data with the cooperation cell in next dispatching cycle Cause.

Optionally, a CSI-IM resource includes at least one resource element RE, belongs to the money of same CSI-IM resources Source element RE has identical mark, belongs to the resource element RE of different CSI-IM resources mark difference, the user equipment 11 also include the second receiving unit, and second receiving unit is specifically used for：Receive what the serving cell in the collaboration set was sent Second configured information, second configured information include the numbering of each CSI-IM resources, and second configured information is used to refer to Show the signal power in numbering identical CSI-IM resources at least one resource element RE is taken it is average as the CSI-IM The power of resource.

Optionally, user equipment also includes the second transmitting element, and second transmitting element is specifically used for：To the collaboration set Interior serving cell sends channel of each cooperation cell at least one interference combination under every kind of interference combination Quality indicator (CQI).

It is appreciated that the user equipment of the present embodiment may correspond to the above-mentioned reality as described in Fig. 4, Fig. 6-Figure 10 are one of any The CQI for applying example determines user equipment in method, and division and/or the work(of the modules in the user equipment of the present embodiment Can etc. be for realizing method flow as shown in Fig. 4, Fig. 6-Figure 10 are one of any, for sake of simplicity, will not be repeated here.

As shown in figure 14, the embodiment of the present invention provides a kind of base station, and the base station is determined in method for performing above CQI Base station performed by step.The base station can include the module corresponding to corresponding steps.

Exemplary, the base station includes：

Dispensing unit 1501, for for each cooperation cell configurating channel state information reference signals CSI-RS in collaboration set Resource and at least one channel condition information interferometry CSI-IM resources；

First transmitting element 1502, for sending the first configured information to user equipment, first configured information is used for The interference information under at least one interference combination of the user equipment measurement is indicated, first configured information includes at least one Interference combination, the interference are combined as any combination at least one CSI-IM resources；

First receiving unit 1503, each cooperation cell is at least in the collaboration set for receiving user equipment transmission A kind of channel quality indicator (CQI) in the interference combination under every kind of interference combination.

In the embodiment of the present invention, first configured information includes in the collaboration set each cooperation cell in difference Combination under CSI-IM resources.

Optionally, as shown in figure 15, the base station 15 also includes：

Second transmitting element 1504, for the second configured information sent to the user equipment, the second instruction letter Breath includes the numbering of each CSI-IM resources, and second configured information is used for instruction user equipment by numbering identical CSI-IM Signal power in resource at least one resource element RE takes the average interference as the CSI-IM resources.

Optionally, the dispensing unit 1501 is additionally operable to：For each cooperation cell configuration first in the collaboration set Channel condition information CSI-RS and at least one CSI-IM resources, provided so as to obtain user equipment according to the first CSI-RS The channel condition information CSI of each cooperation cell of source measurement.

Optionally, the base station also includes：

Second receiving unit, for receiving the channel of each cooperation cell by the serving cell in the collaboration set Status information CSI, wherein, the CSI of a cooperation cell includes the pre-coding matrix PMI and order instruction RI of the cooperation cell；

Acquiring unit, for being prelisted corresponding to each cooperation cell of CSI acquisitions according to each cooperation cell CSI-RS after code；Wherein, the CSI-RS after the precoding of a cooperation cell and the cooperation cell are in next dispatching cycle The beam direction for sending data is consistent；

3rd transmitting element, it is each cooperation for the CSI-RS after the precoding according to each cooperation cell Cell configuration corresponds to the CSI-RS after precoding, is prelisted so as to obtain user equipment according to corresponding to each cooperation cell configuration CSI-RS after code, calculate interference information of each cooperation cell under at least one interference combination.

It is appreciated that the base station of the present embodiment may correspond to above-mentioned such as Fig. 4, the implementation described in one of Fig. 6 to Figure 10 is any The CQI of example determines base station in method, and the division of the modules in the base station of the present embodiment and/or function etc. be for Realize such as Fig. 4, the method flow shown in one of Fig. 6 to Figure 10 is any, for sake of simplicity, will not be repeated here.

As shown in figure 16, the embodiment of the present invention provides a kind of user equipment, including：Processor 30, memory 31, system are total Line 32 and communication interface 33；

The memory 31 is used to store computer executed instructions, and the processor 30 is with the memory 31 by described System bus 32 connects, and when the user equipment is run, the processor 30 performs the meter that the memory 31 stores Calculation machine execute instruction so that the user equipment perform such as Fig. 4, Fig. 6-Figure 10 arbitrarily one of as described in CQI determine in method Method performed by user equipment, specific CQI determine method can be found in it is above-mentioned such as Fig. 4, as Fig. 6-Figure 10 it is one of any shown in Embodiment in associated description, here is omitted.

The processor 30 can be central processing unit (English：Central processing unit, abbreviation：CPU). The processor 30 can also be other general processors, digital signal processor (English：digital signal Processing, abbreviation DSP), application specific integrated circuit (English：application specific integrated Circuit, abbreviation ASIC), field programmable gate array (English：Field-programmable gate array, referred to as FPGA) either other PLDs, discrete gate or transistor logic, discrete hardware components etc..General procedure Device can be microprocessor or the processor can also be any conventional processor etc..

The processor 30 can be application specific processor, and the application specific processor can include baseband processing chip, at radio frequency Manage at least one in chip etc..Further, the application specific processor can also include having other dedicated processes of user equipment The chip of function.

The memory 31 can include volatile memory (English：Volatile memory), such as arbitrary access deposits Reservoir (English：Random-access memory, abbreviation：RAM)；The memory 31 can also include nonvolatile memory (English：Non-volatile memory), such as read-only storage (English：Read-only memory, abbreviation：ROM), soon Flash memory (English：Flash memory), hard disk (English：Hard disk drive, abbreviation：) or solid state hard disc (English HDD Text：Solid-state drive, abbreviation：SSD)；The memory 31 can also include the combination of the memory of mentioned kind.

The system bus 32 can include data/address bus, power bus, controlling bus and signal condition bus etc..This reality Apply in example for clear explanation, various buses are all illustrated as system bus 32 in figure 16.

The communication interface 33 can be specifically the transceiver on user equipment.The transceiver can be wireless transceiver. For example, wireless transceiver can be antenna of user equipment etc..The processor 30 is set by the communication interface 33 with other It is standby, such as the transmitting-receiving of data is carried out between base station.

During specific implementation, it is above-mentioned such as Fig. 4, Fig. 6-Figure 10 it is one of any as described in CQI determine in method flow Each step the computer of the software form stored in memory 31 can be performed by the processor 30 of example, in hardware perform Instruction is realized.To avoid repeating, here is omitted.

The present embodiment also provides a kind of storage medium, and the storage medium can include the memory 31.

The embodiment of the present invention provides a kind of computer-readable recording medium, including computer executed instructions, when the processor of user equipment is held During the row computer executed instructions, the user equipment is performed as any one of above-mentioned first aspect or first aspect can The CQI described in mode is selected to determine method.

As shown in figure 17, the embodiment of the present invention provides a kind of base station, including：Processor 40, memory 41, system bus 42 With communication interface 43；

The memory 41 is used to store computer executed instructions, and the processor 40 is with the memory 41 by described System bus 42 connects, and when the base station is run, the processor 40 performs the computer that the memory 41 stores Execute instruction so that the base station perform such as Fig. 4, Fig. 6-Figure 10 one of arbitrarily as described in CQI determine in method base station this held Capable method.Specific CQI determine method can be found in it is above-mentioned such as Fig. 4, as Fig. 6-Figure 10 one of arbitrarily shown in embodiment in Associated description, here is omitted.

The embodiment of the present invention provides a kind of computer-readable recording medium, including computer executed instructions, when the computing device institute of base station When stating computer executed instructions, the CQI that the base station is performed as described in Fig. 4, Fig. 6-Figure 10 any one optional mode is true Determine the method corresponding to base station in method.

The processor 40 can be CPU.The processor 40 can also be other general processors, DSP, ASIC, FPGA either other PLDs, discrete gate or transistor logic, discrete hardware components etc..General processor Can be microprocessor or the processor can also be any conventional processor etc..

The processor 40 can be application specific processor, and the application specific processor can include baseband processing chip, at radio frequency Manage at least one in chip etc..Further, the application specific processor can also include having other dedicated processes functions of base station Chip.

The memory 41 can include volatile memory, such as random access memory ram；The memory 41 Nonvolatile memory, such as read only memory ROM, flash memory, HDD or SSD can be included；The memory 41 may be used also With the combination of the memory including mentioned kind.

The system bus 42 can include data/address bus, power bus, controlling bus and signal condition bus etc..This reality Apply in example for clear explanation, various buses are all illustrated as system bus 42 in fig. 17.

The communication interface 43 can be specifically the transceiver on base station.The transceiver can be wireless transceiver.For example, Wireless transceiver can be antenna of base station etc..The processor 40 by the communication interface 43 and other equipment, such as with The transmitting-receiving of data is carried out between the equipment of family.

During specific implementation, each step of base station in the above-mentioned method flow as shown in Fig. 4, Fig. 6-Figure 10 are one of any Suddenly the computer executed instructions that the software form stored in memory 41 can be performed by the processor 40 of example, in hardware are real It is existing.To avoid repeating, here is omitted.

The embodiment of the present invention provides a kind of communication system, and the communication system includes multiple user equipmenies and base station, for this The description of each user equipment for details, reference can be made to the above-mentioned embodiment as shown in Figure 11-Figure 13 and Figure 16 in multiple user equipmenies In to the associated description of user equipment, the description for base station for details, reference can be made to the above-mentioned implementation as shown in Figure 14,15 and Figure 17 To the associated description of base station in example, here is omitted.

In communication system provided in an embodiment of the present invention, it is above-mentioned that the present invention is respectively adopted by multiple user equipmenies and base station CQI described in embodiment determines method, and user equipment can be caused to determine each cooperation cell in institute using CSI-RS The channel quality indicator (CQI) under every kind of interference combination in interference combination is stated, so, when cooperation cell quantity is very big, base Station is not necessarily the more IMR resources of user device configuration, solves and is utilized in the prior art when cooperation cell quantity is very big The problem of expense of IMR measurement interference is significantly increased with the increase of cooperation cell.

The unit illustrated as separating component can be or may not be physically separate, show as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list Member can be realized in the form of SFU software functional unit.

If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use When, it can be stored in a computer read/write memory medium.Based on such understanding, all or part of the technical scheme It can be embodied in the form of software product, the computer software product is stored in a storage medium, including some fingers Make to cause a computer equipment (can be personal computer, server, or network equipment etc.) or computing device The all or part of step of each embodiment methods described of the present invention.The storage medium is non-transitory (English：non- Transitory) medium, including：Flash memory, mobile hard disk, read-only storage, random access memory, magnetic disc or light Disk etc. is various can be with the medium of store program codes.

The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims

1. a kind of CQI determines method, it is characterised in that including：

User equipment obtains in collaboration set the channel state information reference signals CSI-RS of each cooperation cell configuration and extremely A few channel condition information interferometry CSI-IM resource；

The CSI-RS that the user equipment configures according to each cooperation cell, it is dry at least one to calculate each cooperation cell Disturb the interference information under combination；Wherein, the interference is combined as any combination at least one CSI-IM resources；

The user equipment is according to each cooperation cell at least one interference information disturbed under combining and each association Make the descending channel information of cell, it is determined that the every kind of interference combination at least one interference combination of each cooperation cell Under channel quality indicator (CQI).

2. according to the method for claim 1, it is characterised in that the CSI-RS of each cooperation cell configuration is pre- CSI-RS after coding, the CSI-RS after the precoding send number with the cooperation cell in next dispatching cycle According to beam direction it is consistent.

3. according to the method for claim 1, it is characterised in that for the first cooperation cell, first cooperation cell is Any one cooperation cell in the collaboration set in all cooperation cells；

The CSI-RS that the user equipment configures according to first cooperation cell, first cooperation cell is calculated extremely A kind of few interference information disturbed under combination, including：

The CSI-RS that the user equipment configures according to first cooperation cell, calculate in the collaboration set except described the Remaining cooperation cell outside one cooperation cell, the interference under at least one interference combination to first cooperation cell Power；

The user equipment calculates jamming power of other cells outside the collaboration set to first cooperation cell；

The user equipment is by remaining cooperation cell in the collaboration set in addition to first cooperation cell at least one To the jamming power of first cooperation cell under the interference combination, and other cells outside the collaboration set are to described The jamming power sum of first cooperation cell, it is defined as interference letter of first cooperation cell under at least one interference combination Breath.

4. according to the method for claim 3, it is characterised in that methods described also includes：

The CSI-RS that the user equipment configures according to each cooperation cell, determine the descending letter of each cooperation cell Road information.

5. according to the method for claim 4, it is characterised in that the user equipment calculates other outside the collaboration set Cell to the jamming power of first cooperation cell, including：

Sent according to the descending channel information of first cooperation cell, first cooperation cell on the first running time-frequency resource CSI-RS, and the first reference signal that user equipment receives on first running time-frequency resource, determine the collaboration set Outside other cells to the interference information of first cooperation cell.

6. according to the method for claim 1, it is characterised in that in the user equipment according to each cooperation cell at least The descending channel information of interference information and each cooperation cell under a kind of interference combination, it is determined that each cooperation cell exists Before channel quality indicator (CQI) in the interference combination under every kind of interference combination, methods described also includes：

The user equipment obtains the power that each cooperation cell in the collaboration set sends data in next dispatching cycle；

If it is determined that the power and the ginseng of the 4th cooperation cell of data are sent in next dispatching cycle in the presence of the 4th cooperation cell Examine between signal power and difference power be present, the user equipment adjusts the reference signal power of the 4th cooperation cell；

The user equipment by the reference signal power of the 4th cooperation cell after adjustment be defined as it is described 4th cooperation it is small Jamming power of the area to remaining cooperation cell in the collaboration set in addition to the 4th cooperation cell.

7. according to the method for claim 1, it is characterised in that methods described also includes：

The user equipment receives the first configured information that the serving cell in the collaboration set is sent；First configured information For indicating the interference information under at least one interference combination of the user equipment measurement, first configured information is included at least One kind interference combination, the interference are combined as any combination at least one CSI-IM resources.

8. according to the method described in claim 1-6 any one claims, it is characterised in that obtained in the user equipment The channel state information reference signals CSI-RS and at least one channel status letter of each cooperation cell configuration in collaboration set Before ceasing interferometry CSI-IM resources, methods described also includes：

The user equipment obtains in the collaboration set the first CSI-RS of each cooperation cell configuration and at least one CSI-IM resources, the pre-configured CSI-RS letters of current dispatching cycle of first CSI-RS including each cooperation cell Number；Wherein, the pre-configured CSI-RS of the current dispatching cycle of different cooperation cells is configured in different CSI processes；

The user equipment measures the channel condition information CSI of each cooperation cell according to first CSI-RS； The CSI of one cooperation cell includes the pre-coding matrix PMI and order instruction RI of the cooperation cell；

Serving cell of the user equipment into the collaboration set sends the channel condition information of each cooperation cell CSI, to cause channel shape of the base station in the collaboration set belonging to each cooperation cell difference according to each cooperation cell CSI-RS after each cooperation cell precoding of state acquisition of information, wherein, the CSI-RS after precoding exists with the cooperation cell The beam direction that next dispatching cycle sends data is consistent.

9. according to the method described in claim 1-8 any one claims, it is characterised in that a CSI-IM resource includes At least one resource element RE, the resource element RE for belonging to same CSI-IM resources have identical mark, belong to different The resource element RE of CSI-IM resources mark is different；Methods described also includes：

The user equipment receives the second configured information that the serving cell in the collaboration set is sent, second configured information Include the numbering of each CSI-IM resources, second configured information be used to indicating by numbering identical CSI-IM resources at least Signal power on one resource element RE takes the average power as the CSI-IM resources.

10. according to the method described in claim 1-9 any one claims, it is characterised in that methods described also includes：

It is every kind of described at least one interference combination that serving cell into the collaboration set sends each cooperation cell Channel quality indicator (CQI) under interference combination.

A kind of 11. determination method of CQI, it is characterised in that including：

Base station is each cooperation cell configurating channel state information reference signals CSI-RS and at least one letter in collaboration set Channel state information interferometry CSI-IM resources；

The base station sends the first configured information to user equipment；First configured information is used to indicate that the user equipment is surveyed The interference information under at least one interference combination is measured, first configured information includes at least one interference and combined, the interference Any combination being combined as at least one CSI-IM resources；

Each cooperation cell is at least one interference in the collaboration set that the base station reception user equipment is sent Channel quality indicator (CQI) in combination under every kind of interference combination.

12. according to the method for claim 11, it is characterised in that methods described also includes：

The second configured information is sent to the user equipment, second configured information includes the numbering of each CSI-IM resources, Second configured information is used to indicate the user equipment by least one resource element in numbering identical CSI-IM resources Signal power on RE takes the average power as the CSI-IM resources.

13. according to the method for claim 11, it is characterised in that methods described also includes：

The channel condition information CSI for each cooperation cell that the user equipment is sent is received, wherein, a cooperation cell CSI include the pre-coding matrix PMI and order instruction RI of the cooperation cell；

CSI-RS after the precoding according to corresponding to the CSI of each cooperation cell obtains each cooperation cell；Wherein, CSI-RS after the precoding of one cooperation cell sends the beam direction of data with the cooperation cell in next dispatching cycle Unanimously；

The precoding according to corresponding to the CSI-RS after the precoding of each cooperation cell for each cooperation cell configuration CSI-RS afterwards, to cause the user equipment according to the CSI- after the corresponding precoding that each cooperation cell configures RS, calculate interference information of each cooperation cell under at least one interference combination.

14. a kind of user equipment, it is characterised in that including processor, memory, system bus and communication interface；

The memory is used to store computer executed instructions, and the processor is connected with the memory by the system bus Connect, when the user equipment is run, the computer executed instructions of memory storage described in the computing device, so that The CQI that the user equipment performs as described in claim 1-10 any one claims determines method.

A kind of 15. base station, it is characterised in that including：Processor, memory, system bus and communication interface；

The memory is used to store computer executed instructions, and the processor is connected with the memory by the system bus Connect, when the base station is run, the computer executed instructions of memory storage described in the computing device, so that described The CQI that base station performs as described in claim 11-13 any one claims determines method.