CN102647789B

CN102647789B - Send the method for detection reference signal, resource allocation methods, system and base station

Info

Publication number: CN102647789B
Application number: CN201110040668.5A
Authority: CN
Inventors: 弓宇宏; 孙云锋; 郭森宝; 郑勇; 任敏
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-02-18
Filing date: 2011-02-18
Publication date: 2016-06-15
Anticipated expiration: 2031-02-18
Also published as: CN102647789A; WO2012109901A1

Abstract

The present invention relates to the method, resource allocation methods, system and the base station that send detection reference signal in a kind of multipoint cooperative transmission system. This resource allocation methods: network side is that user equipment (UE) distributes resource, does the resource of distribution comprise the resource for sending detection reference signal (abbreviation SRS resource), is wherein CoMP? UE distribution SRS resource be non-CoMP? the SRS resource of UE distribution is orthogonal; Described resource allocation result is notified described UE by network side. The present invention can solve the interference problem of SRS signal, it is to increase SRS channel detection performance.

Description

Send the method for detection reference signal, resource allocation methods, system and base station

Technical field

The present invention relates to the communications field, particularly relate to a kind of method, resource allocation methods, system and the base station that send detection reference signal.

Background technology

In existing LTE-A (LongTermEvolution-Advanced, senior long-term evolution) system, the performance difference of Cell Edge User equipment (UserEquipment, UE) and little zone center UE is still a great difficult problem. Although the use of multi-antenna technology can improve the data rate of little zone center, but it is difficult to improve the performance of cell edge. Cell edge due to signal interference ratio lower, it is very difficult to support multithread transmission. Therefore the antenna amount adopted along with system increases, the performance of little zone center may improve constantly, but the performance of cell edge is difficult to improve, the high-order modulating that the heart can use in the cell is also difficult to use at cell edge, causes the performance difference of little zone center and cell edge increasing.

Therefore, lte-a system will improve cell-edge performance as one of its main index. In order to improve the transfer rate of cell edge, 3GPP releases CoMP (CoordinatedMulti-Point multipoint cooperative) transmission technology. It improves the transfer speed of edge UE mainly through the cooperation of minizone, although CoMP technology improves the throughput capacity of edge UE but too increases the complexity of network system simultaneously.

In CoMP system, for same UE provides service, (this kind of UE is called CoMPUE to multiple node cooperation by the present invention, otherwise it is called non-CoMPUE or non-CoMPUE), in order to make eNB make the scheduling of rational resource, CoMPUE needs to send SRS (SoundingReferenceSignal, detection reference signal) information to serving cell and cooperation cell simultaneously and measures uplink channel status information. In addition in CoMPTDD system, SRS is as the effective feedback scheme of one, and CoMPUE also needs to send SRS to serving cell and cooperation cell simultaneously makes eNB obtain corresponding downlink channel condition information. But CoMPUE transmits SRS signal in the uplink to the data or the SRS signal interference that are often subject to user in cooperation cell during cooperation cell, and especially SRS signal disturbs.This is owing to the cell-specificization of SRS sequence set designs, the SRS base sequence that UE in neighbor cell uses is from different sequence set, may have different sequence lengths or overlap in frequency, make the cross-correlation between sequence bigger, interference is relatively serious, causes the SRS channel detection performance between CoMPUE to its cooperation cell seriously to decline. As shown in Figure 1, CoMPUE serving cell in the uplink is cell1, and cooperation cell is cell2. SRS detection performance for CoMPUE → cell1 channel can accept, because being there is not interference in the community of LTE. But the SRS detection performance of CoMPUE → cell2 channel then declines greatly owing to being subject to strong interference, because the SRS signal of CoMPUE itself experienced by bigger decline from cell1 to cell2, be more seriously this CoMPUE and other interference UE (UE1-4) SRS sequence of using from different sequence set, may have different sequence lengths and there is component frequency and hand over folded, cause between them, there is stronger cross-correlation, thus there is relatively strong jamming.

The SRS that this kind of SRS sequence cross-correlation causes disturbs the CoMP degradation brought, it is possible to even " can offset " benefit adopting CoMP to bring.

Summary of the invention

The present invention discloses the method, resource allocation methods, system and the base station that send detection reference signal in a kind of multipoint cooperative transmission system, to solve the interference problem of SRS signal.

For solving above technical problem, the present invention provides a kind of resource allocation methods, and the method comprises:

Network side is that user equipment (UE) distributes resource, and the resource of distribution comprises the resource for sending detection reference signal (abbreviation SRS resource), wherein for CoMPUE distribution SRS resource orthogonal with the SRS resource distributed for non-CoMPUE;

Described resource allocation result is notified described UE by network side.

Further, to realize SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure orthogonal in described network side.

Further, described network side be the common factor of set and the set of the subframe distributed for described non-CoMPUE of the subframe that described CoMPUE distributes for empty, or described network side is that the common factor of set and the set of the Comb distributed for described non-CoMPUE of the Comb that described CoMPUE distributes is for empty.

Further, described network side adopts the resource distribution mode of inside, LTE normal cells for CoMPUE distribution SRS resource in cooperation set community.

Further, the resource of described network side distribution also comprises the resource for sending data signal, if it is orthogonal that described network side realizes SRS resource by sub-frame configuration mode, when then dividing the resource being used in and sending data signal, the corresponding resource of the CoMPUE transmission SRS signal of the UE of the cooperation cell of instruction cooperation set in serving cell reduces data signal and sends power or last symbol of the corresponding Resource Block of release.

Further, the CoMPUE of the UE of cooperation cell of network side instruction cooperation set community in serving cell sends the step reducing last symbol that data signal sends power or the corresponding Resource Block of release in the corresponding resource of SRS signal and comprises:

Serving cell notifies that to its cooperation cell the CoMPUE of this community sends the resource information of SRS signal;

Described cooperation cell is according to the resource information received, send indication information to this community UE, send to indicate the CoMPUE of this community UE in serving cell and the corresponding resource of SRS signal reduces data signal send power or last symbol of the corresponding Resource Block of release;

When described cooperation cell UE sends data signal, the CoMPUE in serving cell sends last symbol reducing data signal in the corresponding resource of SRS signal and sending power or discharge corresponding Resource Block.

Further, last symbol mode of the corresponding Resource Block of release comprises punching or adopts shortening (Shorten) structure.

For solving above technical problem, present invention also offers a kind of base station, this base station comprises:

Resource distribution module, for distributing resource for user equipment (UE), distribution resource comprise the resource for sending detection reference signal (SRS) (abbreviation SRS resource), wherein for CoMPUE distribute SRS resource orthogonal with the SRS resource distributed for non-CoMPUE;

Resource allocation result notification module, for notifying described UE by resource allocation result.

For solving above technical problem, present invention also offers a kind of method sending detection reference signal (SRS), the method comprises:

Network side is that user equipment (UE) distributes resource and notifies described UE, distribution resource comprise the resource for sending SRS signal (abbreviation SRS resource), wherein for CoMPUE distribute SRS resource orthogonal with the SRS resource distributed for non-CoMPUE;

Described UE determines SRS signal, and sends described SRS signal in the SRS resource of described network side distribution.

Further, described UE determines that the step of SRS signal comprises:

Described network side and UE default setting are for determining the community mark rule of SRS signal, and wherein said CoMPUE uses virtual subdistrict ID to determine SRS signal, and described non-CoMPUE uses actual physics community ID to determine SRS signal;

UE described in described network side direction sends indication information, and this indication information is the CoMP attribute being used to indicate described UE;

The indication information that described UE sends according to described network side, it is determined that use community mark, and determine described SRS signal further.

Further, described UE determines that the step of SRS signal comprises:

UE described in described network side direction sends indication information, and this indication information is used to indicate described UE for determining the community mark of described SRS signal; If wherein described UE is CoMPUE, then instruction uses virtual subdistrict ID, if non-CoMPUE, then instruction uses actual physics community ID;

The indication information that described UE sends according to described network side, it is determined that community identifies, and determines described SRS signal further.

For solving above technical problem, present invention also offers a kind of coordinated multipoint transmission (CoMP) system, this system comprises:

The resource allocation announcement module of network side, for distributing resource for user equipment (UE), distribution resource comprise the resource for sending detection reference signal (SRS) (abbreviation SRS resource), wherein for CoMPUE distribute SRS resource orthogonal with the SRS resource distributed for non-CoMPUE;

The resource allocation result notification module of described network side, for notifying described UE by resource allocation result;

The SRS signal determination module of described UE, for determining SRS signal; And

The sending module of described UE, sends described SRS signal in the SRS resource distributed in described network side.

The inventive method and system, the SRS signal being eliminated non-CoMPUE in the set that cooperates by the resource orthogonalization used by CoMPUE and non-CoMPUE is to the interference of serving cell CoMPSRS, further, by the interference mode of CoMPUE virtual subdistrict eliminated between the SRS signal of CoMPUE, the data signal eliminating UE in cooperation set in cooperation set by power adjustment, punching or the mode of shorten structure is to the interference of CoMPSRS, thus improves in CoMP system CoMPUE to the SRS channel detection performance of its cooperation cell.

Accompanying drawing explanation

Fig. 1 is the interference schematic diagram suffered by the transmission of the CoMPSRS in CoMP system.

Fig. 2 is the method schematic diagram of the transmission detection reference signal (SRS) of the embodiment of the present invention one;

Fig. 3 is that under the present invention adopts virtual subdistrict mark situation, UE determines the schematic diagram of the mode one of SRS signal;

Fig. 4 is that under the present invention adopts virtual subdistrict mark situation, UE determines the schematic diagram of the mode two of SRS signal;

Fig. 5 is the cooperation set community in CoMP system and virtual subdistrict schematic diagram;

Fig. 6 is the schematic diagram using cell-specific sub-frame configuration to distinguish CoMP user and non-CoMP user in FDD system;

Fig. 7 is the schematic diagram using comb configuration to distinguish CoMP user and non-CoMP user.

Embodiment

Embodiment one

This embodiment gives the SRS signal of non-CoMPUE transmission in cooperation cell in a kind of multipoint cooperative transmission system to the interference elimination method of the SRS signal that CoMPUE sends.

As shown in Figure 2, in this embodiment, the method sending detection reference signal (SRS) comprises:

Step 201: network side is that user equipment (UE) distributes resource and notifies described UE, distribution resource comprise the resource for sending SRS signal (abbreviation SRS resource), wherein for CoMPUE distribute SRS resource orthogonal with the SRS resource distributed for non-CoMPUE;

During specific implementation, resources allocation can be realized by base station, and by high-rise signaling or physical layer signaling to UE.

UE in cooperation set is divided into two portions, and all CoMPUE are parts, and all non-CoMPUE are another part. According to CoMP and non-CoMPUE, available SRS resource being divided into orthogonal two portions, a part is for CoMPUE, and another part is for non-CoMPUE. The resource that CoMPUE and non-CoMPUE uses can be the division in time domain or the division on frequency domain.

Step 202: determine SRS signal, and send described SRS signal in the SRS resource of described network side distribution.

Preferably, described network side is by sub-frame configuration or frequency spectrum comb (Comb, in R8, comb can equal 0 or 1, and what represent that SRS signal takies on frequency domain respectively is in odd positions or subcarrier on even number position) to realize SRS resource orthogonal for the mode that configures. Further, the subframe of configuration can be specific (cell-specific) subframe in community or user equipment specific (UE-specific) subframe.

Further, it is achieved the orthogonal mode of SRS resource includes but not limited to following several mode:

Time domain orthogonal: network side is by selecting different sub-frame configuration indexes (as shown in table 1) for CoMPUE and non-CoMPUE, the subframe that arbitrary CoMPUE is distributed is orthogonal with the subframe distributed for arbitrary non-CoMPUE, also it is, the common factor gathering the set with the subframe distributed for described non-CoMPUE that network side is the subframe that described CoMPUE distributes is sky, specifically sees application example 1,2 hereafter;

Frequency domain is orthogonal: the common factor gathering the set with the Comb distributed for described non-CoMPUE that network side is the Comb that described CoMPUE distributes is sky, specifically sees application example 3 hereafter.

Embodiment two

This embodiment gives in a kind of multipoint cooperative transmission system the method for the interference of the SRS signal eliminating between CoMPUE.

With embodiment one the difference is that, an as virtual subdistrict is regarded all CoMPUE in CoMP cooperation set in network side, Intra-cell in LTE is utilized to be there is not interference specific, the resource allocation methods of inside, a similar normal cells in LTE is adopted to carry out resources allocation, namely by TDM (TimeDivisionMultiplexing, time-division multiplexing), FDM (Frequency-divisionmultiplexing, frequently point multiplexing), comb (frequency spectrum comb) configuration or CS (CyclicShift, ring shift) configure the SRS interference eliminated realizing between CoMPUE.

When UE determines the SRS signal to be sent, it is necessary to community mark (ID) first determining to use, and then determine SRS signal, it is determined that the process of SRS signal preferably has following two kinds of modes:

Mode one, as shown in Figure 3, comprises the following steps:

Step 301: network side and UE default setting are for determining the community mark rule of SRS signal, and wherein said CoMPUE uses virtual subdistrict ID to determine SRS signal, and described non-CoMPUE uses actual physics community ID to determine SRS signal;

Virtual subdistrict ID is that base station and UE appoint.

Step 302: UE described in described network side direction sends indication information, and this indication information is the CoMP attribute being used to indicate described UE;

Preferably, base station can issue 1bit to UE and identify signaling, and being used to indicate the UE receiving this signaling is CoMPUE or non-CoMPUE, and wherein, 0 this UE of instruction is not CoMPUE, and 1 this UE of instruction is CoMPUE,

Step 303: the indication information that described UE sends according to described network side, it is determined that use community mark, and determine described SRS signal further.

UE judges it oneself is CoMPUE or non-CoMPUE according to this signaling content received, 303a, if CoMPUE, then UE uses virtual ID to obtain the SRS signal (also referred to as SRS sequence) to be sent, 303b, if non-CoMPUE then uses actual place physical district ID to obtain the SRS signal to be sent. In addition, it is non-CoMPUE that the UE not receiving this signaling is defaulted as.

Mode two, as shown in Figure 4, comprises the following steps:

Step 401: UE described in described network side direction sends indication information, this indication information is used to indicate described UE for determining the community mark of described SRS signal; If wherein described UE is CoMPUE, then instruction uses virtual subdistrict ID, if non-CoMPUE, then instruction uses actual physics community ID;

Each UE is directly issued the signaling of the community ID that this UE of instruction uses by network side, and wherein the value of this signaling content Zhong Gai community ID may be the actual physics community ID at virtual subdistrict ID or this UE place. In addition, it is non-CoMPUE that the UE not receiving this signaling is defaulted as.

Step 402: the indication information that described UE sends according to described network side, it is determined that community identifies, and determines described SRS signal further.

UE is according to the signaling received, it may also be useful to the community ID indicated by described signaling obtains being sent SRS signal, 402a, and this UE is CoMPUE, it may also be useful to the virtual ID made an appointment determines SRS signal; 402b, this UE is non-CoMPUE, it may also be useful to actual physical district ID determines SRS signal.

Embodiment three

This embodiment gives in a kind of multipoint cooperative transmission system in cooperation cell data signal to the removing method of serving cell CoMPSRS signal disturbing.

The resource of described network side distribution also comprises the resource for sending data signal, with embodiment two the difference is that, if it is orthogonal that network side realizes SRS resource by sub-frame configuration mode, then described network side divide be used in send data signal resource time, the CoMPUE of the UE of instruction cooperation cell, network side in its serving cell sends last symbol reduced in the resource of SRS signal on data signal power or release respective resources block, specifically comprises:

In cooperation set, serving cell notifies that to its cooperation cell the CoMPUE of this community sends the resource information of SRS signal;

Cooperation cell is according to the resource information received, send indication information to this community UE, in the corresponding resource that the CoMPUE of this community UE in serving cell sends SRS signal, reduce data signal send power or last symbol of the corresponding Resource Block of release to indicate;

In above embodiment, serving cell and cooperation cell carry out the network element of resources allocation is not same network element, if same network element, then the direct network element carrying out resources allocation by this network side sends to the CoMPUE of serving cell and indicates.

Data signal mainly sends on PUSCH channel, and according to the instruction of cooperation cell, UE reduces the transmission power of PUSCH in corresponding resource or punched by the PUSCH in this resource or the PUSCH in this resource is adopted shorten structure.

Wherein, PUSCH punching is referred to the original data on last symbol destroying each RB of PUSCH, adopt shorten structure to refer to PUSCH and on last symbol of each RB of PUSCH, do not send any data.

Embodiment four

This embodiment gives the SRS interference elimination method in a kind of multipoint cooperative transmission system.

As shown in Figure 5, the community in cooperation set comprises cell1, cell2 and cell3, and the cooperation cell of to be the cooperation cell of cell2 and cell3, cell2 be in the cooperation cell of cell1 cell1 and cell3, cell3 is cell1 and cell2. According to inventive concept, in this embodiment, during the distribution resource of network side, comprise the following aspects:

1, network side is continued to use in R8/9 as the mode of the UE distribution resource in normal cells is the resource that all CoMPUE in these three communities (CoMPUE in CoMPUE and cell3 in CoMPUE, cell2 of comprising in cell1) distribution sends SRS signal.

Regard all CoMPUE in these three communities as a virtual subdistrict, and there is a virtual ID, the resource distribution mode that inner CoMPUE then continues to use in R8/9 in normal cells in virtual subdistrict realizes orthogonal, and the network resource namely obtained according to virtual ID realize orthogonal by the mode that TDM, FDM, comb or CS configure.

2, the resource that network side uses two portions orthogonal respectively is that all CoMPUE in these three communities and all non-CoMPUE distribute resource;

The resource that this virtual subdistrict and cell1～3 use two portions orthogonal respectively is to realize the SRS interference eliminated of CoMPUE and non-CoMPUE.

3, the CoMPUE of the UE of network side instruction cooperation cell in its serving cell sends last symbol reduced in the resource of SRS signal on data signal power or release respective resources block.

The UE of cooperation cell reduces this community PUSCH power, punching in the respective resources of its serving cell CoMPSRS or adopts shorten structure, it is achieved cooperation cell data signal is to the interference eliminated of the SRS signal that CoMPUE sends.

Application example 1

This application example gives in FDD system, by making CoMPUE and non-CoMPUE in cooperation set use different cell-specific sub-frame configuration respectively, it is achieved the concrete signal of the orthogonality of SRS resource between CoMPUE and non-CoMPUE.

Table 1 is to the SRScell-specific sub-frame configuration in FDD system in 3GPPTS36.211 agreement.

Cell-specific sub-frame configuration in table 1FDD system

Observe table 1, it is possible to summarize the completely orthogonal cell-specific sub-frame configuration of a lot of group (cycle of sub-frame configuration is a corresponding SRS signal and sub-frame offset, namely determine the subframe that can be used in every frame sending SRS signal), such as sub-frame configuration { 1, it is completely orthogonal between 2,10,12}, sub-frame configuration { 3,4,5,6,8,10, it is completely orthogonal between 11,12}, sub-frame configuration { 5,6,7,8, between 11,12} completely orthogonal, sub-frame configuration { 2,4,5,6,8,9,10, between 11,12} completely orthogonal, etc.Selecting part sub-frame configuration for virtual subdistrict according to different granularities according to system situation in the sub-frame configuration set orthogonal by these, correspondingly other sub-frame configuration in orthogonal sub-frame configuration set is for serving cell and cooperation cell.

Such as shown in Figure 6, the SRS that 1,3,7 and 9 these four kinds of varigrained sub-frame configuration are used for virtual subdistrict sends, and serving cell and cooperation cell then select the sub-frame configuration being used sub-frame configuration orthogonal with this virtual subdistrict as its cell-specific sub-frame configuration. Such as, if virtual subdistrict selection is sub-frame configuration 1, so serving cell and cooperation cell are just from { selecting cell-speicific sub-frame configuration 2,10,12}; If what virtual subdistrict was selected is that sub-frame configuration 3, serving cell and cooperation cell are just from { selecting a kind of cell-specific sub-frame configuration 4,5,6,8,10,11,12}; If what virtual subdistrict was selected is that sub-frame configuration 7, serving cell and cooperation cell are just from { selecting a kind of sub-frame configuration 5,6,8,11,12}; If what virtual subdistrict was selected is that sub-frame configuration 9, serving cell and cooperation cell are just from { selecting a kind of 2,4,5,6,8,10,11,12}. Sub-frame configuration 0,13 and 14 and any configuration are all non-orthogonal, so the SRS that can not be used for CoMPUE sends.

By the mode of this kind of sub-frame configuration, it is possible to the SRS zero realized in cooperation set community between CoMPUE and non-CoMPUE disturbs.

Application example 2

This application example gives in a tdd system, by reserving fixing one or more cell-specific sub-frame resources for the CoMPUE in cooperation set, non-CoMPUE uses institute remaining cell-specific sub-frame resources transmission SRS in the cell simultaneously, realize the orthogonality between CoMPUE and non-CoMPUE, namely, the common factor gathering the set with the subframe distributed for non-CoMPUE making the subframe for CoMPUE distribution is sky, it is achieved the concrete signal of the orthogonality between CoMPUE and non-CoMPUE.

Table 2 is to the SRScell-specific sub-frame configuration in TDD system in 3GPPTS36.213 agreement, and table 3 is configured by the uplink downlink of TDD system in 3GPPTS36.211 agreement.

Cell-specific sub-frame configuration in table 2TDD system

The uplink downlink configuration of table 3TDD system

In upper table, D represents that this subframe is descending sub frame, and S represents that this subframe is special subframe, and U represents that this subframe is sub-frame of uplink.

It may be seen that there is not completely orthogonal cell-specific sub-frame configuration in observation table 2, but have a feature simultaneously yet in TDD system, namely can be used under any two cell-specific sub-frame configuration sends and all there is common factor between the sub-frame set of SRS. If under high level configures, the cell-specific sub-frame configuration of cell1, cell2 and cell3 is respectively A1, A2 and A3, and A1 ∩ A2 ∩ A3=A. In fact, the existence that minizone SRS disturbs causes due to the non-sky of sub-frame set A just. In order to avoid non-CoMPUE to the interference of CoMPUE, sub-frame set A or its subset A ' can distribute to all CoMPUE (i.e. virtual subdistrict) in cell1, cell2 and cell3 use, and by all the other subframes in A1, A2 and A3 respectively for other non-CoMPUE in these three communities.

Such as when the cell-specific sub-frame configuration respectively 0,1 and 2 of cell1, cell2 and cell3, the configuration of its uplink downlink is configuration 1, and by table 2 and table 3 known A1 ∩ A2 ∩ A3={1,6}, and subframe 1 and 6 all can be used for upward signal and send.According to inventive concept, subframe 1 can be used for virtual subdistrict use, and other non-CoMPUE subframe outside subframe 1 being used in serving cell and cooperation cell uses, namely the non-CoMPUE in cell1 uses subframe collection A1/1, non-CoMPUE in cell2 uses subframe collection A2/1, and the non-CoMPUE in cell3 uses subframe collection A3/1. Wherein Ai/1 refers to the surplus element set after deleting element 1 in set A i.

By the mode of this kind of sub-frame configuration, make network side be the common factor of set and the set of the subframe distributed for described non-CoMPUE of the subframe that described CoMPUE distributes for empty, thus SRS zero interference between CoMPUE and non-CoMPUE in the set community that can also realize cooperating.

Application example 3

This application example gives by making CoMPUE and non-CoMPUE in cooperation set use different comb configurations respectively, it is achieved the concrete signal of the frequency domain orthogonality between CoMPUE and non-CoMPUE.

It is example with RPF (namely RePetitionFactor repeats coefficient)=2

CoMPUE and non-CoMPUE respectively uses a comb, and such as CoMPUE uses comb=0, and non-CoMPUE can only use another one, i.e. comb=1; Or CoMPUE uses comb=1, and non-CoMPUE can only use another one, i.e. comb=0.

For RPF=4

Allowing CoMPUE and non-CoMPUE respectively use two wherein comb, such as, CoMPUE uses comb=0&2, and non-CoMPUE uses comb=1&3, as shown in Figure 7.

Or, allow CoMPUE and non-CoMPUE use one of them comb and three comb respectively or to use a three wherein comb and comb respectively.

Regardless of the value of RPF, when network side carries out resources allocation, as long as ensureing that the Comb's for described CoMPUE distribution gathers the common factor with the set being the Comb that described non-CoMPUE distributes for sky, the object of elimination interference can be realized.

Method in this embodiment had both been applicable to FDD system, was also applicable to TDD system.

Based on above embodiment and application example, the present invention also can be described as a kind of resource allocation methods, and the method comprises:

A) network side is that user equipment (UE) distributes resource, and the resource of distribution comprises the resource for sending SRS signal (abbreviation SRS resource), wherein for CoMPUE distribution SRS resource orthogonal with the SRS resource distributed for non-CoMPUE;

B) described resource allocation result is notified described UE by network side.

As previously mentioned, can to realize SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure orthogonal in network side. Also it is, network side be the common factor of set and the set of the subframe distributed for described non-CoMPUE of the subframe that described CoMPUE distributes for empty, or described network side is that the common factor of set and the set of the Comb distributed for described non-CoMPUE of the Comb that described CoMPUE distributes is for empty.

Described network side adopts the resource distribution mode of inside, LTE normal cells to distribute SRS resource for CoMPUE in cooperation set community, it is possible to avoid the interference between the SRS signal that CoMPUE sends.

Specifically, the CoMPUE of the UE of cooperation cell of network side instruction cooperation set community in serving cell sends the step reducing last symbol that data signal sends power or the corresponding Resource Block of release in the corresponding resource of SRS signal and comprises:

Last symbol mode of the corresponding Resource Block of release comprises punching or adopts shortening (Shorten) structure.

Ground, the function of above network side, it is possible to realize in base station can be understood.

Corresponding to aforementioned method, present invention also offers a kind of coordinated multipoint transmission (CoMP) system, this system comprises:

The resource distribution module of network side, for distributing resource for user equipment (UE), distribution resource comprise the resource for sending detection reference signal (SRS) (abbreviation SRS resource), wherein for CoMPUE distribute SRS resource orthogonal with the SRS resource distributed for non-CoMPUE;

Further, to realize SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure orthogonal for described resource distribution module.

Specifically, described resource distribution module be the common factor of set and the set of the subframe distributed for described non-CoMPUE of the subframe that described CoMPUE distributes for empty, or described network side is that the common factor of set and the set of the Comb distributed for described non-CoMPUE of the Comb that described CoMPUE distributes is for empty.

Further, the resource distribution module of described network side, the resource distribution mode adopting the inside, normal cells of long-term evolution (LTE) system is CoMPUE distribution SRS resource in cooperation set community.

Corresponding to the mode shown in Fig. 3, described network side and UE default setting are for determining the community mark rule of SRS signal, and wherein said CoMPUE uses virtual subdistrict ID to determine SRS signal, and described non-CoMPUE uses actual physics community ID to determine SRS signal;

Described network side also comprises indication information and issues module, and for sending indication information to described UE, this indication information is the CoMP attribute being used to indicate described UE;

The SRS signal determination module of described UE, for the indication information sent according to described network side, it is determined that uses community mark, and determines described SRS signal further.

Corresponding to the mode shown in Fig. 4, described network side also comprises indication information and issues module, and for sending indication information to described UE, this indication information is used to indicate described UE for determining the community mark of described SRS signal; If wherein described UE is CoMPUE, then instruction uses virtual subdistrict ID, if non-CoMPUE, then instruction uses actual physics community ID;

The SRS signal of described UE confirms module, according to the indication information that described network side sends, it is determined that community identifies, and determines described SRS signal further.

By sub-frame configuration mode realize SRS resource orthogonal time, then in order to avoid data signal to the interference of SRS signal, the resource of the resource distribution module distribution of described network side also comprises the resource for sending data signal, when point being used in the resource sending data signal, the CoMPUE of the UE of cooperation cell being also used to indicate cooperation set in serving cell sends and reduces data signal in the corresponding resource of SRS signal and send power or last symbol of the corresponding Resource Block of release.

In addition, present invention also offers a kind of base station, this base station comprises:

Preferably, to realize SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure orthogonal in described base station.

The resource distribution module of described base station, the resource distribution mode adopting the inside, normal cells of long-term evolution (LTE) system is CoMPUE distribution SRS resource in cooperation set community.

Further, the resource of the resource distribution module distribution of described base station also comprises the resource for sending data signal, if it is orthogonal to realize SRS resource by sub-frame configuration mode, when then dividing the resource being used in and sending data signal, the CoMPUE of the UE of cooperation cell being also used to indicate cooperation set in serving cell sends and reduces data signal in the corresponding resource of SRS signal and send power or last symbol of the corresponding Resource Block of release.

The inventive method and system, base station, the SRS signal being eliminated non-CoMPUE in the set that cooperates by the resource orthogonalization used by CoMPUE and non-CoMPUE is to the interference of serving cell CoMPSRS, further, by the interference mode of CoMPUE virtual subdistrict eliminated between the SRS signal of CoMPUE, the data signal eliminating UE in cooperation set in cooperation set by power adjustment, punching or the mode of shorten structure is to the interference of CoMPSRS, thus improves in CoMP system CoMPUE to the SRS channel detection performance of its cooperation cell.

One of ordinary skill in the art will appreciate that all or part of step in aforesaid method is carried out instruction related hardware by program and completed, described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD etc. Can selection of land, all or part of step of above-described embodiment can also use one or more unicircuit to realize. Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, it is also possible to adopts the form of software function module to realize. The present invention does not limit the combination of the hardware and software in any particular form.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a resource allocation methods, it is characterised in that, the method comprises:

Described resource allocation result is notified described UE by network side;

The resource of described network side distribution also comprises the resource for sending data signal, if it is orthogonal that described network side realizes SRS resource by sub-frame configuration mode, when then dividing the resource being used in and sending data signal, the corresponding resource of the CoMPUE transmission SRS signal of the UE of the cooperation cell of instruction cooperation set in serving cell reduces data signal and sends power.

2. the method for claim 1, it is characterised in that: it is orthogonal that described network side realizes SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure.

3. method as claimed in claim 1 or 2, it is characterized in that: described network side be the common factor of set and the set of the subframe distributed for described non-CoMPUE of the subframe that described CoMPUE distributes for empty, or described network side is that the common factor of set and the set of the Comb distributed for described non-CoMPUE of the Comb that described CoMPUE distributes is for empty.

4. the method for claim 1, it is characterised in that: described network side adopts the resource distribution mode of inside, LTE normal cells for CoMPUE distribution SRS resource in cooperation set community.

5. the method for claim 1, it is characterized in that, the CoMPUE of the UE of the cooperation cell of instruction cooperation set community, network side in serving cell sends the step reducing last symbol that data signal sends power or the corresponding Resource Block of release in the corresponding resource of SRS signal and comprises:

6. method as claimed in claim 5, it is characterised in that: last symbol mode of the corresponding Resource Block of release comprises punching or (Shorten) structure is shortened in employing.

7. a base station, it is characterised in that, this base station comprises:

Resource allocation result notification module, for notifying described UE by resource allocation result;

The resource of the resource distribution module distribution of described base station also comprises the resource for sending data signal, if it is orthogonal to realize SRS resource by sub-frame configuration mode, when then dividing the resource being used in and sending data signal, the CoMPUE of the UE of cooperation cell being also used to indicate cooperation set in serving cell sends and reduces data signal in the corresponding resource of SRS signal and send power.

8. base station as claimed in claim 7, it is characterised in that: it is orthogonal that described base station realizes SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure.

9. system as claimed in claim 7, it is characterised in that: the resource distribution module of described base station, the resource distribution mode adopting the inside, normal cells of long-term evolution (LTE) system is CoMPUE distribution SRS resource in cooperation set community.

10. one kind sends the method for detection reference signal (SRS), it is characterised in that, the method comprises:

Described UE determines SRS signal, and sends described SRS signal in the SRS resource of described network side distribution;

Wherein, described UE determines that the step of SRS signal comprises:

The indication information that described UE sends according to described network side, it is determined that use community mark, and determine described SRS signal further;

Or, described UE determines that the step of SRS signal comprises:

11. methods as claimed in claim 10, it is characterised in that: it is orthogonal that described resource distribution module realizes SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure.

12. methods as claimed in claim 10, it is characterised in that: described network side adopts the resource distribution mode of inside, LTE normal cells for CoMPUE distribution SRS resource in cooperation set community.

13. 1 kinds of coordinated multipoint transmission (CoMP) systems, it is characterised in that, this system comprises:

The sending module of described UE, sends described SRS signal in the SRS resource distributed in described network side;

The resource of the resource distribution module distribution of described network side also comprises the resource for sending data signal, if it is orthogonal to realize SRS resource by sub-frame configuration mode, when then dividing the resource being used in and sending data signal, the CoMPUE of the UE of cooperation cell being also used to indicate cooperation set in serving cell sends and reduces data signal in the corresponding resource of SRS signal and send power.

14. systems as claimed in claim 13, it is characterised in that: it is orthogonal that described resource distribution module realizes SRS resource by the mode that sub-frame configuration or frequency spectrum comb (Comb) configure.

15. systems as claimed in claim 13, it is characterized in that: the resource allocation announcement module of described network side, the resource distribution mode adopting the inside, normal cells of long-term evolution (LTE) system is CoMPUE distribution SRS resource in cooperation set community.

16. systems as claimed in claim 15, it is characterized in that: described network side and UE default setting are for determining the community mark rule of SRS signal, wherein said CoMPUE uses virtual subdistrict ID to determine SRS signal, and described non-CoMPUE uses actual physics community ID to determine SRS signal;

17. systems as claimed in claim 15, it is characterised in that: described network side also comprises indication information and issues module, and for sending indication information to described UE, this indication information is used to indicate described UE for determining the community mark of described SRS signal; If wherein described UE is CoMPUE, then instruction uses virtual subdistrict ID, if non-CoMPUE, then instruction uses actual physics community ID;