CN102647789A - Method for sending SRS (Sounding Reference Signal), resource allocation method, system and base station - Google Patents
Method for sending SRS (Sounding Reference Signal), resource allocation method, system and base station Download PDFInfo
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Abstract
The invention relates to a method for sending an SRS (Sounding Reference Signal), a resource allocation method, a system and a base station in a CoMP (Cooperative Multi-Point) transmission system. The resource allocation method comprises the following steps that: the resource is allocated for UE (User Equipment) by a network side, and the allocated resource comprises the resource for sending the SRS (shorting for SRS resource), wherein the SRS resource which is allocated for CoMP UE and the SRS resource which is allocated for non-CoMP UE are orthogonal; and the resource allocation result is notified for the UE by the network side. According to the method for sending the SRS, the resource allocation method, the system and the base station, disclosed by the invention, the problem of SRS interference can be solved, and the sounding performance of an SRS channel can be increased.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method, resource allocation methods, system and base station of sending detection reference signal.
Background technology
In existing LTE-A (Long Term Evolution-Advanced, senior Long Term Evolution) system, (User Equipment, UE) performance difference with center of housing estate UE is still a great difficult problem to Cell Edge User equipment.Though the use of multi-antenna technology can improve the data transfer rate of center of housing estate, but be difficult to improve the performance of cell edge.Cell edge is difficult to support the multithread transmission because signal interference ratio is lower.Therefore the antenna amount that adopts along with system increases; The performance of center of housing estate possibly improve constantly; But the performance of cell edge is difficult to improve; Also be difficult in cell edge in the operable high-order modulating of center of housing estate and use, cause the performance difference of center of housing estate and cell edge increasing.
Therefore, the LTE-A system will improve cell-edge performance as one of its main indexes.In order to improve the transmission rate of cell edge, 3GPP releases CoMP (Coordinated Multi-Point multipoint cooperative) transmission technology.It mainly improves the message transmission rate of edge UE through the cooperation of minizone, though the CoMP technology has been improved the complexity that the throughput of edge UE has also increased network system simultaneously.
In the CoMP system; A plurality of node cooperations are that same UE provides service (the present invention is called CoMP UE with this UE; Otherwise be called non-CoMP UE or non-CoMP UE); In order to make eNB make rational scheduling of resource, CoMP UE needs to send SRS (Sounding Reference Signal, detection reference signal) information measurement up channel state information to Serving cell and cooperation cell simultaneously.In CoMP TDD system, SRS is as a kind of effective feedback scheme in addition, and CoMP UE also needs to make eNB obtain the corresponding downstream channel condition information to Serving cell and cooperation cell transmission SRS simultaneously.But CoMP UE transmits in up link and tends to receive user's data or the interference of SRS signal in the cooperation cell, especially SRS signal interference when the SRS signal is given cooperation cell.This is because the cell-specific design of SRS sequence set; The employed SRS basic sequence of UE in the neighbor cell is from the different sequences group; Possibly have different sequences length or on frequency, overlap; Make the cross correlation between the calling sequence bigger, disturb more seriously, cause CoMP UE seriously to descend to the SRS channel detection performance between its cooperation cell.As shown in Figure 1, the Serving cell of CoMP UE in up link is cell1, and cooperation cell is cell2.SRS detection performance for CoMP UE → cell1 channel can be accepted, because be not have interference in the sub-district of LTE.But the SRS detection performance of CoMP UE → cell2 channel then descends owing to receive strong interference greatly; Because the SRS signal of CoMP UE itself has experienced bigger decline from cell1 to cell2; More seriously be this CoMP UE with other disturb the employed SRS sequence of UE (UE1-4) from the different sequences group, possibly have different sequences length and exist component frequency to overlap; Cause having strong cross-correlation between them, thereby exist than strong jamming.
The SRS that this SRS sequence cross-correlation is caused disturbs the CoMP decreased performance of being brought, and the benefit that CoMP brought is adopted in possibility even meeting " counteracting ".
Summary of the invention
The present invention discloses method, resource allocation methods, system and the base station of sending 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 invention provides a kind of resource allocation methods, this method comprises:
Network side is subscriber equipment (UE) Resources allocation, and the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send detection reference signal, wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMPUE distribution;
Network side is notified said UE with said resource allocation result.
Further, said network side is realized SRS resource quadrature through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration.
Further; Said network side be the intersection of sets collection of set and the subframe of distributing of the said CoMP UE subframe of distributing for said non-CoMP UE for empty, or said network side is that the intersection of sets collection of set and the Comb that distributes for said non-CoMP UE of the Comb that distributes of said CoMP UE is for empty.
Further, said network side adopts the inner resource distribution mode in the common sub-district of LTE to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
Further; The resource that said network side distributes also comprises the resource that is used to send data-signal; If said network side is realized SRS resource quadrature through the sub-frame configuration mode; When then branch was used in the resource of sending data-signal, the UE of the cooperation cell of indication cooperation set reduced the data-signal transmitted power or discharges last symbol of corresponding Resource Block on the corresponding resource of the CoMP of Serving cell UE transmission SRS signal.
Further, the UE of the cooperation cell of network side indication cooperation set sub-district sends the step that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge last symbol of corresponding Resource Block and comprises at the CoMPUE of Serving cell:
The resource information that Serving cell notifies the CoMP UE of this sub-district to send the SRS signal to its cooperation cell;
Said cooperation cell is according to the resource information that receives; Send indication information to this sub-district UE, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE to indicate this sub-district UE;
When said cooperation cell UE sends data-signal, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
Further, last the symbol mode that discharges corresponding Resource Block comprises punching or adopts and shorten (Shorten) structure.
For solving above technical problem, the present invention also provides a kind of base station, and this base station comprises:
Resource distribution module is used to subscriber equipment (UE) Resources allocation, and the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send detection reference signal (SRS), wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
The resource allocation result notification module is used for notifying said UE with resource allocation result.
For solving above technical problem, the present invention also provides the method for a kind of transmission detection reference signal (SRS), and this method comprises:
Network side is subscriber equipment (UE) Resources allocation and notifies said UE that the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send the SRS signal, wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
Said UE confirms the SRS signal, and on the SRS resource that said network side distributes, sends said SRS signal.
Further, said network side adopts the inner resource distribution mode in the common sub-district of LTE to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
Further, said UE confirms that the step of SRS signal comprises:
Said network side and UE default setting are used for confirming the cell ID rule of SRS signal, and wherein said CoMP UE uses virtual subdistrict ID to confirm the SRS signal, and said non-CoMP UE uses actual physics sub-district ID to confirm the SRS signal;
Said network side sends indication information to said UE, and this indication information is the CoMP attribute that is used to indicate said UE;
The indication information that said UE sends according to said network side is confirmed to use cell ID, and is further confirmed said SRS signal.
Further, said UE confirms that the step of SRS signal comprises:
Said network side sends indication information to said UE, and this indication information is to be used to indicate said UE to be used for confirming the cell ID of said SRS signal; Wherein if said UE is CoMP UE, then virtual subdistrict ID is used in indication, if non-CoMP UE, then actual physics sub-district ID is used in indication;
Said UE confirms cell ID according to the indication information that said network side sends, and further confirms said SRS signal.
For solving above technical problem, the present invention also provides a kind of multipoint cooperative to transmit (CoMP) system, and this system comprises:
The resource allocation notification module of network side; Be used to subscriber equipment (UE) Resources allocation; The resource of distributing comprises the resource (being called for short the SRS resource) that is used to send detection reference signal (SRS), wherein is CoMPUE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
The resource allocation result notification module of said network side is used for notifying said UE with resource allocation result;
The SRS signal determination module of said UE is used for confirming the SRS signal; And
The sending module of said UE is used on the SRS resource that said network side distributes, sending said SRS signal.
The inventive method and system; Through the resource orthogonalization of CoMP UE and non-CoMP UE use having been eliminated of the interference of the SRS signal of non-CoMP UE in the cooperation set to Serving cell CoMP SRS; Further; Through the mode of CoMP UE virtual subdistrictization having been eliminated the SRS interference between signals of CoMP UE; Eliminated in the cooperation set in the cooperation set data-signal of UE to the interference of CoMP SRS through the mode of power adjustment, punching or shorten structure, thereby improved in the CoMP system CoMP UE to the SRS channel detection performance of its cooperation cell.
Description of drawings
Fig. 1 is the suffered interference sketch map of CoMP SRS transmission in the CoMP system.
Fig. 2 is the method sketch map of the transmission detection reference signal (SRS) of the embodiment of the invention one;
Fig. 3 is that the present invention adopts under the virtual subdistrict sign situation, and UE confirms the sketch map of the mode one of SRS signal;
Fig. 4 is that the present invention adopts under the virtual subdistrict sign situation, and UE confirms the sketch map of the mode two of SRS signal;
Fig. 5 is cooperation set sub-district and the virtual subdistrict sketch map in the CoMP system;
Fig. 6 uses the cell-specific sub-frame configuration to distinguish CoMP user and non-CoMP user's sketch map in the FDD system;
Fig. 7 is to use the comb configuration to distinguish CoMP user and non-CoMP user's sketch map.
Embodiment
Embodiment one
This embodiment has provided in a kind of multipoint cooperative transmission system the interference elimination method of the SRS signal that non-CoMP UE sends in the cooperation cell SRS signal sends CoMP UE.
As shown in Figure 2, among this embodiment, the method for sending detection reference signal (SRS) comprising:
Step 201: network side is subscriber equipment (UE) Resources allocation and notifies said UE that the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send the SRS signal, wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
During concrete the realization, can realize resource allocation by the base station, and notify to UE through high-level signaling or physical layer signaling.
UE in the cooperation set is divided into two parts, and all CoMP UE are parts, and all non-CoMP UE are another part.According to two parts that CoMP and non-CoMP UE are quadrature with operational SRS resource division, a part supplies CoMP UE to use, and another part supplies non-CoMPUE to use.CoMP UE and the employed resource of non-CoMP UE can be division or the divisions on the frequency domain on the time domain.
Step 202: confirm the SRS signal, and on the SRS resource that said network side distributes, send said SRS signal.
Preferably, said network side is realized SRS resource quadrature through the mode of sub-frame configuration or frequency spectrum comb (Comb, comb can equal 0 or 1 in R8, representing the SRS signal respectively is on the odd positions or the locational subcarrier of even number what take on the frequency domain) configuration.Further, the subframe of configuration can be specific (cell-specific) subframe in sub-district or subscriber equipment specific (UE-specific) subframe.
Further, the mode of realization SRS resource quadrature includes but not limited to following several kinds of modes:
Time domain orthogonal: network side is through selecting different sub-frame configuration index (as shown in table 1) for CoMP UE with non-CoMP UE; The subframe and the subframe quadrature that distributes for arbitrary non-CoMP UE that make arbitrary CoMP UE distribution; Also be; Network side is that the set of the subframe of said CoMP UE distribution is sky, the application example 1,2 that specifically sees below with the intersection of sets collection that is the subframe of said non-CoMP UE distribution;
The frequency domain quadrature: network side is that the set of the Comb of said CoMP UE distribution is sky, the application example 3 that specifically sees below with the intersection of sets collection that is the Comb of said non-CoMP UE distribution.
Embodiment two
This embodiment has provided the method for eliminating the interference of the SRS signal between the CoMP UE in a kind of multipoint cooperative transmission system.
Different with embodiment one is; Network side is regarded all the CoMP UE in the CoMP cooperation set as a virtual subdistrict; Utilize that inside, sub-district is do not have interference specific among the LTE; Adopt the resource allocation methods of inside, a similar common sub-district among the LTE to carry out resource allocation, promptly through TDM (Time Division Multiplexing, time division multiplexing), FDM (Frequency-division multiplexing; Frequency division multiplexing), comb (frequency spectrum comb) configuration or CS (Cyclic Shift, cyclic shift) configuration realize the SRS interference eliminated between the CoMPUE.
During SRS signal that UE confirms to send, need to confirm earlier the cell ID (ID) that uses, and then definite SRS signal, confirm that the process of SRS signal preferably has following dual mode:
Mode one, as shown in Figure 3, may further comprise the steps:
Step 301: network side and UE default setting are used for confirming the cell ID rule of SRS signal, and wherein said CoMP UE uses virtual subdistrict ID to confirm the SRS signal, and said non-CoMP UE uses actual physics sub-district ID to confirm the SRS signal;
Virtual subdistrict ID is that base station and UE appoint.
Step 302: said network side sends indication information to said UE, and this indication information is the CoMP attribute that is used to indicate said UE;
Preferably, the base station can issue 1bit sign signaling to UE, and being used to indicate the UE that receives this signaling is CoMP UE or non-CoMP is UE, and wherein, 0 this UE of indication is not CoMP UE, and 1 this UE of indication is CoMP UE,
Step 303: the indication information that said UE sends according to said network side, confirm to use cell ID, and further confirm said SRS signal.
UE judges it oneself is CoMP UE or non-CoMP is UE according to this signaling content that receives; 303a; If CoMP is UE; Then UE uses virtual ID to obtain the SRS signal (being also referred to as the SRS sequence) that will send, and 303b is if non-CoMP UE then uses actual place physical district ID to obtain the SRS signal that will send.In addition, it is non-CoMP UE that the UE that does not receive this signaling is defaulted as.
Mode two, as shown in Figure 4, may further comprise the steps:
Step 401: said network side sends indication information to said UE, and this indication information is to be used to indicate said UE to be used for confirming the cell ID of said SRS signal; Wherein if said UE is CoMP UE, then virtual subdistrict ID is used in indication, if non-CoMP UE, then actual physics sub-district ID is used in indication;
Network side directly issues the signaling of an employed sub-district ID of this UE of indication to each UE, wherein the value of this sub-district ID possibly be the actual physics sub-district ID at virtual subdistrict ID or this UE place in this signaling content.In addition, it is non-CoMP UE that the UE that does not receive this signaling is defaulted as.
Step 402: said UE confirms cell ID according to the indication information that said network side sends, and further confirms said SRS signal.
UE uses the indicated sub-district ID of said signaling to obtain sending the SRS signal according to the signaling that receives, and 402a, this UE are CoMP UE, uses the virtual ID of making an appointment to confirm the SRS signal; 402b, this UE are non-CoMP UE, use actual physical sub-district ID to confirm the SRS signal.
Embodiment three
This embodiment has provided the removing method that data-signal disturbs Serving cell CoMP SRS signal in the cooperation cell in a kind of multipoint cooperative transmission system.
The resource that said network side distributes also comprises the resource that is used to send data-signal; Different with embodiment two is; If network side is realized SRS resource quadrature through the sub-frame configuration mode; When then said network side branch was used in the resource of sending data-signal, the UE of network side indication cooperation cell reduced data-signal power or discharges last symbol on the respective resources piece on the resource of the CoMP of its Serving cell UE transmission SRS signal, specifically comprises:
The resource information that Serving cell notifies the CoMP UE of this sub-district to send the SRS signal to its cooperation cell in the cooperation set;
Cooperation cell is according to the resource information that receives; Send indication information to this sub-district UE, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block with indication at this sub-district UE at the CoMP of Serving cell UE;
When said cooperation cell UE sends data-signal, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
To carry out the network element of resource allocation be not same network element for Serving cell and cooperation cell among the above embodiment, if same network element, the network element that then directly carries out resource allocation by this network side sends indication to the CoMPUE of Serving cell and gets final product.
Data-signal mainly sends on the PUSCH channel, and according to the indication of cooperation cell, UE reduces the transmitted power of PUSCH or the PUSCH on this resource is punched perhaps to the employing of the PUSCH on this resource shorten structure on corresponding resource.
Wherein, punching is meant the legacy data on last symbol of destroying each RB of PUSCH to PUSCH, adopts the shorten structure to be meant to PUSCH and on last symbol of each RB of PUSCH, does not send any data.
Embodiment four
This embodiment has provided the SRS interference elimination method in a kind of multipoint cooperative transmission system.
As shown in Figure 5, the sub-district in the cooperation set comprises cell1, cell2 and cell3, and the cooperation cell of cell1 is cell2 and cell3, and the cooperation cell of cell2 is cell1 and cell3, and the cooperation cell of cell3 is cell1 and cell2.According to inventive concept, among this embodiment, comprise the following aspects during the network side Resources allocation:
1, network side is continued to use the resource of sending the SRS signal for the mode of the UE Resources allocation in the common sub-district for the distribution of all the CoMP UE (comprising CoMP UE, the CoMP UE among the cell2 and the CoMP UE among the cell3 among the cell1) in these three sub-districts among the R8/9.
Regard all the CoMP UE in these three sub-districts as a virtual subdistrict; And has a virtual ID; Then continue to use the realization of the resource distribution mode in common sub-district quadrature among the R8/9 at the inner CoMP UE of virtual subdistrict, promptly realize quadrature through the mode that TDM, FDM, comb or CS dispose according to the Internet resources that virtual ID is obtained.
2, network side uses the resource of two parts quadrature to be all CoMP UE and all non-CoMP UE Resources allocation in these three sub-districts respectively;
This virtual subdistrict and cell1～3 use the resource of two parts quadrature to realize the SRS interference eliminated of CoMP UE and non-CoMP UE respectively.
3, the UE of network side indication cooperation cell reduces data-signal power or discharges last symbol on the respective resources piece on the resource of the CoMP of its Serving cell UE transmission SRS signal.
The UE of cooperation cell reduces this sub-district PUSCH power, punching or adopts the shorten structure on the respective resources of its Serving cell CoMP SRS, realize the interference eliminated of cooperation cell data-signal to the SRS signal of CoMP UE transmission.
Application example 1
This application example has provided in the FDD system, uses different cell-specific sub-frame configuration through making the CoMP UE in the cooperation set respectively with non-CoMP UE, realizes the concrete signal of the orthogonality of SRS resource between CoMP UE and the non-CoMP UE.
Table 1 is to the SRS cell-specific sub-frame configuration in the FDD system in 3GPP TS 36.211 agreements.
Cell-specific sub-frame configuration in the table 1FDD system
Observe table 1, can summarize a lot of groups of completely orthogonal cell-specific sub-frame configuration (cycle and the sub-frame offset of a SRS signal that sub-frame configuration is corresponding promptly confirmed the subframe that can be used for sending the SRS signal in every frame), for example sub-frame configuration 1,2,10, be completely orthogonal between the 12}; Sub-frame configuration { 3,4,5,6,8,10; 11, be completely orthogonal between the 12}, sub-frame configuration { 5,6,7,8; 11, complete quadrature between the 12}, sub-frame configuration { 2,4,5,6; 8,9,10,11, complete quadrature between the 12}, or the like.Supply virtual subdistrict to use with selecting a part of sub-frame configuration according to different granularities according to system situation in the sub-frame configuration set of these quadratures, correspondingly other sub-frame configuration in the set of quadrature sub-frame configuration supplies Serving cell and cooperation cell to use.
For example as shown in Figure 6; The SRS that 1,3,7 and 9 these four kinds of varigrained sub-frame configuration is used for virtual subdistrict sends, and the sub-frame configuration that Serving cell and cooperation cell are then selected to use the sub-frame configuration quadrature with this virtual subdistrict is as its cell-specific sub-frame configuration.For example, if virtual subdistrict selects is sub-frame configuration 1, so Serving cell and cooperation cell just from 2,10, selection cell-speicific sub-frame configuration among the 12}; If what virtual subdistrict was selected is sub-frame configuration 3, Serving cell and cooperation cell just from 4,5,6,8,10,11, a kind of cell-specific sub-frame configuration of selection among the 12}; If what virtual subdistrict was selected is sub-frame configuration 7, Serving cell and cooperation cell just from 5,6,8,11, a kind of sub-frame configuration of selection among the 12}; If what virtual subdistrict was selected is sub-frame configuration 9, Serving cell and cooperation cell are just from { 2,4,5,6,8,10,11, selection is a kind of among the 12}.Sub-frame configuration 0,13 and 14 and any configuration all non-orthogonal, send so can not be used for the SRS of CoMPUE.
Through the mode of this sub-frame configuration, the SRS zero in the set sub-district of can realizing cooperating between CoMP UE and the non-CoMP UE disturbs.
Application example 2
This application example has provided in the TDD system; Through reserving fixing one or more cell-specific sub-frame resources for the CoMP UE in the cooperation set; Simultaneously non-CoMP UE uses remaining cell-specific sub-frame resources transmission SRS in the sub-district, place; Realize the orthogonality between CoMP UE and the non-CoMP UE; That is, make the set of the subframe of distributing for CoMP UE and the intersection of sets collection that be the non-CoMP UE subframe of distributing be sky, the concrete signal of the orthogonality between realization CoMP UE and the non-CoMP UE.
Table 2 be in 3GPP TS 36.213 agreements to the SRS cell-specific sub-frame configuration in the TDD system, table 3 is to the configuration of the uplink downlink of TDD system in 3GPP TS 36.211 agreements.
Cell-specific sub-frame configuration in the table 2TDD system
The uplink downlink configuration of table 3TDD system
In the last table, D representes that this subframe is a descending sub frame, and S representes that this subframe is a special subframe, and U representes that this subframe is a sub-frame of uplink.
Observation table 2 can be found out, does not have completely orthogonal cell-specific sub-frame configuration in the TDD system, all has common factor but also have characteristics, can be used under promptly any two cell-specific sub-frame configuration to send between the subframe set of SRS simultaneously.If under the high level configuration, 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 of minizone SRS interference causes just because of subframe set A non-NULL.For fear of the interference of non-CoMP UE to CoMP UE; Can subframe set A or its subclass A ' be distributed to all CoMP UE (the being virtual subdistrict) use among cell1, cell2 and the cell3, and supply other non-CoMP UE in these three sub-districts to use respectively all the other subframes among A1, A2 and the A3.
For example when the cell-specific sub-frame configuration difference 0,1 and 2 of cell1, cell2 and cell3, its uplink downlink configuration is configuration 1, can know A1 ∩ A2 ∩ A3={1 by table 2 and table 3,6}, and subframe 1 and 6 all can be used for the upward signal transmission.According to inventive concept; Can subframe 1 be used for virtual subdistrict uses; And other non-CoMP UE that the subframe outside the subframe 1 is used for Serving cell and cooperation cell is used; Be the non-CoMP UE use subframe collection A1/1 among the cell1, the non-CoMP UE among the cell2 uses subframe collection A2/1, and the non-CoMP UE among the cell3 uses subframe collection A3/1.Wherein Ai/1 is meant the surplus element set behind the deletion element 1 among the set A i.
Mode through this sub-frame configuration; Make network side be the intersection of sets collection of set and the subframe of distributing of the said CoMP UE subframe of distributing for said non-CoMP UE for empty, thereby the SRS zero between CoMP UE and the non-CoMP UE disturbs in the set sub-district of also can realizing cooperating.
Application example 3
This application example has provided through making the CoMP UE in the cooperation set use different comb configurations respectively with non-CoMP UE, realizes the concrete signal of the frequency domain orthogonality between CoMP UE and the non-CoMP UE.
With RPF (RePetition Factor, i.e. repeat factor)=2 is example
CoMP UE and non-CoMP UE respectively use a comb, and for example CoMP UE uses comb=0, and non-CoMP UE can only use another one, i.e. comb=1; Perhaps CoMP UE uses comb=1, and non-CoMP UE can only use another one, i.e. comb=0.
With RPF=4 is example
Let CoMP UE and non-CoMP UE respectively use two comb wherein, for example, CoMP UE uses comb=0&2, and non-CoMP UE uses comb=1&3, and is as shown in Figure 7.
Perhaps, let CoMP UE and non-CoMP UE use one of them comb and three comb respectively or use three comb and comb wherein respectively.
Regardless of the value of RPF, when network side carries out resource allocation,, can realize eliminating the purpose of interference as long as the set of the Comb that guarantees to distribute for said CoMP UE is sky with the intersection of sets collection that be the Comb that distributes of said non-CoMP UE.
Method among this embodiment both had been applicable to the FDD system, also was applicable to the TDD system.
Based on above embodiment and application example, the present invention also can be described as a kind of resource allocation methods, and this method comprises:
A) network side is subscriber equipment (UE) Resources allocation, and the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send the SRS signal, wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMPUE distribution;
B) network side is notified said UE with said resource allocation result.
As previously mentioned, network side can be realized SRS resource quadrature through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration.Also be; Network side be the intersection of sets collection of set and the subframe of distributing of the said CoMP UE subframe of distributing for said non-CoMP UE for empty, or said network side is that the intersection of sets collection of set and the Comb that distributes for said non-CoMP UE of the Comb that distributes of said CoMP UE is for empty.
Said network side adopts the inner resource distribution mode in the common sub-district of LTE to distribute the SRS resource, the SRS interference between signals that can avoid CoMP UE to send for CoMP UE in the cooperation set sub-district.
Further; The resource that said network side distributes also comprises the resource that is used to send data-signal; If said network side is realized SRS resource quadrature through the sub-frame configuration mode; When then branch was used in the resource of sending data-signal, the UE of the cooperation cell of indication cooperation set reduced the data-signal transmitted power or discharges last symbol of corresponding Resource Block on the corresponding resource of the CoMP of Serving cell UE transmission SRS signal.
Particularly, the UE of the cooperation cell of network side indication cooperation set sub-district sends the step that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge last symbol of corresponding Resource Block and comprises at the CoMPUE of Serving cell:
The resource information that Serving cell notifies the CoMP UE of this sub-district to send the SRS signal to its cooperation cell;
Said cooperation cell is according to the resource information that receives; Send indication information to this sub-district UE, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE to indicate this sub-district UE;
When said cooperation cell UE sends data-signal, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
Last the symbol mode that discharges corresponding Resource Block comprises punching or adopts shortening (Shorten) structure.
Understandably, the function of above network side can realize in the base station.
Corresponding to preceding method, the present invention also provides a kind of multipoint cooperative to transmit (CoMP) system, and this system comprises:
The resource distribution module of network side; Be used to subscriber equipment (UE) Resources allocation; The resource of distributing comprises the resource (being called for short the SRS resource) that is used to send detection reference signal (SRS), wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
The resource allocation result notification module of said network side is used for notifying said UE with resource allocation result;
The SRS signal determination module of said UE is used for confirming the SRS signal; And
The sending module of said UE is used on the SRS resource that said network side distributes, sending said SRS signal.
Further, said resource distribution module is realized SRS resource quadrature through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration.
Specifically; Said resource distribution module be the intersection of sets collection of set and the subframe of distributing of the said CoMP UE subframe of distributing for said non-CoMP UE for empty, or said network side is that the intersection of sets collection of set and the Comb that distributes for said non-CoMP UE of the Comb that distributes of said CoMPUE is for empty.
Further, the resource distribution module of said network side adopts the inner resource distribution mode in common sub-district of Long Term Evolution (LTE) system to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
Corresponding to mode shown in Figure 3, said network side and UE default setting are used for confirming the cell ID rule of SRS signal, and wherein said CoMP UE uses virtual subdistrict ID to confirm the SRS signal, and said non-CoMP UE uses actual physics sub-district ID to confirm the SRS signal;
Said network side comprises that also indication information issues module, is used for sending indication information to said UE, and this indication information is the CoMP attribute that is used to indicate said UE;
The SRS signal determination module of said UE is used for the indication information according to said network side transmission, confirms to use cell ID, and further confirms said SRS signal.
Corresponding to mode shown in Figure 4, said network side comprises that also indication information issues module, is used for sending indication information to said UE, and this indication information is to be used to indicate said UE to be used for confirming the cell ID of said SRS signal; Wherein if said UE is CoMP UE, then virtual subdistrict ID is used in indication, if non-CoMP UE, then actual physics sub-district ID is used in indication;
The SRS signal of said UE is confirmed module, according to the indication information that said network side sends, confirms cell ID, and further confirms said SRS signal.
When realizing SRS resource quadrature through the sub-frame configuration mode; Then for fear of the interference of data-signal to the SRS signal; The resource that the resource distribution module of said network side distributes also comprises the resource that is used to send data-signal; Divide when being used in the resource of sending data-signal, also be used to indicate the UE of the cooperation cell of cooperation set to send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
In addition, the present invention also provides a kind of base station, and this base station comprises:
Resource distribution module is used to subscriber equipment (UE) Resources allocation, and the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send detection reference signal (SRS), wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
The resource allocation result notification module is used for notifying said UE with resource allocation result.
Preferably, SRS resource quadrature is realized through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration in said base station.
The resource distribution module of said base station adopts the inner resource distribution mode in common sub-district of Long Term Evolution (LTE) system to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
Further; The resource that the resource distribution module of said base station distributes also comprises the resource that is used to send data-signal; If realize SRS resource quadrature through the sub-frame configuration mode; Then divide when being used in the resource of sending data-signal, also be used to indicate the UE of the cooperation cell of cooperation set to send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
The inventive method and system, base station; Through the resource orthogonalization of CoMP UE and non-CoMP UE use having been eliminated of the interference of the SRS signal of non-CoMP UE in the cooperation set to Serving cell CoMP SRS; Further; Through the mode of CoMP UE virtual subdistrictization having been eliminated the SRS interference between signals of CoMP UE; Eliminated in the cooperation set in the cooperation set data-signal of UE to the interference of CoMP SRS through the mode of power adjustment, punching or shorten structure, thereby improved in the CoMP system CoMP UE 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 the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (22)
1. a resource allocation methods is characterized in that, this method comprises:
Network side is subscriber equipment (UE) Resources allocation, and the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send detection reference signal, wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMPUE distribution;
Network side is notified said UE with said resource allocation result.
2. the method for claim 1 is characterized in that: said network side is realized SRS resource quadrature through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration.
3. according to claim 1 or claim 2 method; It is characterized in that: said network side be the intersection of sets collection of set and the subframe of distributing of the said CoMPUE subframe of distributing for said non-CoMP UE for empty, or said network side is that the intersection of sets collection of set and the Comb that distributes for said non-CoMP UE of the Comb that distributes of said CoMP UE is for empty.
4. the method for claim 1 is characterized in that: said network side adopts the inner resource distribution mode in the common sub-district of LTE to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
5. the method for claim 1; It is characterized in that: the resource that said network side distributes also comprises the resource that is used to send data-signal; If said network side is realized SRS resource quadrature through the sub-frame configuration mode; When then branch was used in the resource of sending data-signal, the UE of the cooperation cell of indication cooperation set reduced the data-signal transmitted power or discharges last symbol of corresponding Resource Block on the corresponding resource of the CoMP of Serving cell UE transmission SRS signal.
6. method as claimed in claim 5; It is characterized in that the UE of the cooperation cell of network side indication cooperation set sub-district sends the step that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge last symbol of corresponding Resource Block and comprises at the CoMP of Serving cell UE:
The resource information that Serving cell notifies the CoMP UE of this sub-district to send the SRS signal to its cooperation cell;
Said cooperation cell is according to the resource information that receives; Send indication information to this sub-district UE, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE to indicate this sub-district UE;
When said cooperation cell UE sends data-signal, send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
7. method as claimed in claim 6 is characterized in that: last the symbol mode that discharges corresponding Resource Block comprises punching or adopts shortening (Shorten) structure.
8. a base station is characterized in that, this base station comprises:
Resource distribution module is used to subscriber equipment (UE) Resources allocation, and the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send detection reference signal (SRS), wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
The resource allocation result notification module is used for notifying said UE with resource allocation result.
9. base station as claimed in claim 8 is characterized in that: SRS resource quadrature is realized through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration in said base station.
10. system as claimed in claim 8 is characterized in that: the resource distribution module of said base station, adopt the inner resource distribution mode in common sub-district of Long Term Evolution (LTE) system to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
11. system as claimed in claim 8; It is characterized in that: the resource that the resource distribution module of said base station distributes also comprises the resource that is used to send data-signal; If realize SRS resource quadrature through the sub-frame configuration mode; Then divide when being used in the resource of sending data-signal, also be used to indicate the UE of the cooperation cell of cooperation set to send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
12. a method of sending detection reference signal (SRS) is characterized in that this method comprises:
Network side is subscriber equipment (UE) Resources allocation and notifies said UE that the resource of distribution comprises the resource (being called for short the SRS resource) that is used to send the SRS signal, wherein is CoMP UE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
Said UE confirms the SRS signal, and on the SRS resource that said network side distributes, sends said SRS signal.
13. method as claimed in claim 12 is characterized in that: said resource distribution module is realized SRS resource quadrature through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration.
14. method as claimed in claim 12 is characterized in that: said network side adopts the inner resource distribution mode in the common sub-district of LTE to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
15. method as claimed in claim 14 is characterized in that: said UE confirms that the step of SRS signal comprises:
Said network side and UE default setting are used for confirming the cell ID rule of SRS signal, and wherein said CoMP UE uses virtual subdistrict ID to confirm the SRS signal, and said non-CoMP UE uses actual physics sub-district ID to confirm the SRS signal;
Said network side sends indication information to said UE, and this indication information is the CoMP attribute that is used to indicate said UE;
The indication information that said UE sends according to said network side is confirmed to use cell ID, and is further confirmed said SRS signal.
16. method as claimed in claim 14 is characterized in that: said UE confirms that the step of SRS signal comprises:
Said network side sends indication information to said UE, and this indication information is to be used to indicate said UE to be used for confirming the cell ID of said SRS signal; Wherein if said UE is CoMP UE, then virtual subdistrict ID is used in indication, if non-CoMP UE, then actual physics sub-district ID is used in indication;
Said UE confirms cell ID according to the indication information that said network side sends, and further confirms said SRS signal.
17. multipoint cooperative transmission (CoMP) system is characterized in that this system comprises:
The resource allocation notification module of network side; Be used to subscriber equipment (UE) Resources allocation; The resource of distributing comprises the resource (being called for short the SRS resource) that is used to send detection reference signal (SRS), wherein is CoMPUE SRS resource of distributing and the SRS resource quadrature that is non-CoMP UE distribution;
The resource allocation result notification module of said network side is used for notifying said UE with resource allocation result;
The SRS signal determination module of said UE is used for confirming the SRS signal; And
The sending module of said UE is used on the SRS resource that said network side distributes, sending said SRS signal.
18. system as claimed in claim 17 is characterized in that: said resource distribution module is realized SRS resource quadrature through the mode of sub-frame configuration or frequency spectrum comb (Comb) configuration.
19. system as claimed in claim 17 is characterized in that: the resource allocation notification module of said network side, adopt the inner resource distribution mode in common sub-district of Long Term Evolution (LTE) system to distribute the SRS resource for CoMP UE in the cooperation set sub-district.
20. system as claimed in claim 19; It is characterized in that: said network side and UE default setting are used for confirming the cell ID rule of SRS signal; Wherein said CoMP UE uses virtual subdistrict ID to confirm the SRS signal, and said non-CoMP UE uses actual physics sub-district ID to confirm the SRS signal;
Said network side comprises that also indication information issues module, is used for sending indication information to said UE, and this indication information is the CoMP attribute that is used to indicate said UE;
The SRS signal determination module of said UE is used for the indication information according to said network side transmission, confirms to use cell ID, and further confirms said SRS signal.
21. system as claimed in claim 19 is characterized in that: said network side comprises that also indication information issues module, is used for sending indication information to said UE, and this indication information is to be used to indicate said UE to be used for confirming the cell ID of said SRS signal; Wherein if said UE is CoMP UE, then virtual subdistrict ID is used in indication, if non-CoMP UE, then actual physics sub-district ID is used in indication;
The SRS signal of said UE is confirmed module, according to the indication information that said network side sends, confirms cell ID, and further confirms said SRS signal.
22. system as claimed in claim 17; It is characterized in that: the resource that the resource distribution module of said network side distributes also comprises the resource that is used to send data-signal; If realize SRS resource quadrature through the sub-frame configuration mode; Then divide when being used in the resource of sending data-signal, also be used to indicate the UE of the cooperation cell of cooperation set to send last symbol that reduces the data-signal transmitted power on the corresponding resource of SRS signal or discharge corresponding Resource Block at the CoMP of Serving cell UE.
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| CN201110040668.5A CN102647789B (en) | 2011-02-18 | 2011-02-18 | Send the method for detection reference signal, resource allocation methods, system and base station |
| PCT/CN2011/080035 WO2012109901A1 (en) | 2011-02-18 | 2011-09-22 | Method for sending sounding reference signal, resource allocation method and system, and base station |
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| CN102647789B (en) | 2016-06-15 |
| WO2012109901A1 (en) | 2012-08-23 |
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