CN105516030A - Method for multi-user joint detection in coordinated multi-point transmission system and base station - Google Patents
Method for multi-user joint detection in coordinated multi-point transmission system and base station Download PDFInfo
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Abstract
The invention provides a method for multi-user joint detection in a coordinated multi-point transmission system and a base station. The method comprises the following steps: performing single-user detection of local cell user equipment UE to obtain the single-user detection result of the local cell UE; reconstructing a first received reference symbol and a second received reference symbol of the resource overlapping parts of the local cell UE and coordinated multi-point transmission CoMP UE according to the single-user detection result; performing single-user detection of the CoMP UE according to the first received reference symbol and the second received reference symbol to obtain the soft bit information of the CoMP UE; and sending the soft bit information to a main service cell corresponding to the CoMP UE. Through the method for multi-user joint detection in a coordinated multi-point transmission system and the base station provided by the invention, the flexibility of resource scheduling can be improved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to multi-user combined detection method and base station in a kind of cooperative multicast system.
Background technology
CoMP (CoordinatedMultiplePoints, cooperative multipoint transmission) refer to multiple transfer points that geographical position is separated, collaborative participation is a UE (UserEquipment, subscriber equipment) transfer of data or combine the data that reception UE sends, the multiple transfer points participating in cooperation are often referred to the base station of different districts.Edge UE is placed on the same frequency of several base station by CoMP technology, and several base station is served for this UE simultaneously, to improve the covering performance of edge UE.For CoMP system, the upward signal receiving process edge UE can be combined in multiple community, to improve the throughput of edge UE.
In CoMP system, base station is according to the RSRP (ReferenceSignalReceivingPower of terminal to report, Reference Signal Received Power), judge adjacent area RSRP and this community RSRP intensity, if both are less than predetermined threshold value at difference, then select this adjacent cell to be cooperation cell, when cooperation cell exists idling-resource, the edge UE of this community is defined as CoMPUE.To CoMP cooperation cell, physical resource divides use according to the rules, and the frequency range of each community is divided into CoMP frequency range and common frequency range, and cooperation cell is dodged cooperation resource according to configuration.Up CoMP mainly adopts associating reception programme, by multiple base station collaboration receive mode, transmits the Soft Inform ation come and merges, realize the grand diversity in spatial domain to improve transmission performance by main Serving cell to cooperation cell, improve cell edge UE uplink throughput.In order to improve band resource utilance, system sends data by multiple UE at identical running time-frequency resource, to improve CoMP system throughput further, and the overall performance of the direct influential system of the large young pathbreaker of interference between UE.
In prior art, what in solution cooperation cell, CoMPUE and this community UE disturbed is that the channel matrix of the CoMPUE in cooperation cell and this community UE is aggregated into a large matrix compared with common scheme, do multiuser detection to received signal, extract multiple UE information respectively, cooperation cell passes to main Serving cell the information of CoMPUE, and the soft bit information completing cooperation UE in main Serving cell merges.LTE (LongTermEvolution, Long Term Evolution) the up DM-RS (DemodulationReferenceSignals of R10, demodulated reference signal) at CS (CyclicShift, cyclic shift) multiplexing basis adds OCC code (OrthogonalCoverCode, orthogonal mask) improve channel estimation reliability further, the UE that matches under can supporting multiuser detection takies the situation that PRB (PhysicalResourceBlocks, Physical Resource Block) differs in size.And the uplink multi-users joint-detection pairing UE of LTER8/R9 system needs shared PRB identical, do not support the CoMPUE of non-equiband and the multiuser detection of this community UE, the flexibility of scheduling of resource will be had a strong impact on, restriction CoMP application scenarios.
Visible by foregoing description, in multi-user combined detection method of the prior art, the flexibility of scheduling of resource is lower.
Summary of the invention
The invention provides multi-user combined detection method and base station in a kind of cooperative multicast system, the flexibility of scheduling of resource can be improved.
The invention provides multi-user combined detection method in a kind of cooperative multicast system, comprising:
Single-user detection is carried out to this cell user equipment UE, obtains the Single-user detection result of this community UE;
Receive reference symbol and first according to first of the resource intersection of described this community UE and cooperative multipoint transmission CoMPUE of described Single-user detection result reconstruct and receive data symbol;
Receive data symbol according to described first reception reference symbol and described first and Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE;
The main Serving cell sending to described CoMPUE corresponding described soft bit information.
Further, described Single-user detection is carried out to this cell user equipment UE, obtains the Single-user detection result of this community UE, comprising:
Single-user detection is carried out to this community UE, obtains the local reference signal of this community UE, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported.
Further, first of the described resource intersection according to described this community UE and cooperative multipoint transmission CoMPUE of described Single-user detection result reconstruct receives reference symbol and first and receives data symbol, comprising:
According to described local reference signal and the described first reception reference symbol of described pilot tones domain response reconstruct of this community UE;
Data symbol is received according to the frequency-region signal reconstruct described first that described data frequency domain response and the described equilibrium of this community UE export.
Further, the described described local reference signal according to this community UE and described pilot tones domain response reconstruct described first receive reference symbol, comprising:
Calculate described first according to formula one and receive reference symbol, described formula one is: PS=RS × FR, and wherein, PS is described first reception reference symbol, and RS is described local reference signal, and FR is described pilot tones domain response;
The frequency-region signal reconstruct described first that the described described data frequency domain response according to this community UE and described equilibrium export receives data symbol, comprising:
Calculate described first according to formula two and receive data symbol, described formula two is: PR=DS × FC, and wherein, PR is described first reception data symbol, and DS is the frequency-region signal that described equilibrium exports, and FC is described data frequency domain response.
Further, described according to described first receive reference symbol and described first receive data symbol Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE, comprising:
The reception reference symbol of described CoMPUE is deducted described first reception reference symbol and obtain the second reception reference symbol;
The reception data symbol of described CoMPUE is deducted described first reception data symbol and obtain the second reception data symbol;
Receive data symbol according to described second reception reference symbol and described second and Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE.
On the other hand, the invention provides a kind of base station, comprising:
First Single-user detection module, for carrying out Single-user detection to this cell user equipment UE, obtains the Single-user detection result of this community UE;
Reconstructed module, receives reference symbol and first for first of the resource intersection according to described this community UE and cooperative multipoint transmission CoMPUE of described Single-user detection result reconstruct and receives data symbol;
Second Single-user detection module, carrying out Single-user detection for receiving data symbol according to described first reception reference symbol and described first to described CoMPUE, obtaining the soft bit information of described CoMPUE;
Sending module, for the main Serving cell sending to described CoMPUE corresponding described soft bit information.
Further, described first Single-user detection module, specifically for carrying out Single-user detection to this community UE, obtains the local reference signal of this community UE, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported.
Further, described reconstructed module comprises:
First reconstruct submodule, for receiving reference symbol according to the described local reference signal of this community UE and described pilot tones domain response reconstruct described first;
Second reconstruct submodule, receives data symbol for the frequency-region signal reconstruct described first exported according to described data frequency domain response and the described equilibrium of this community UE.
Further, described first reconstruct submodule, receives reference symbol specifically for calculating described first according to formula one, described formula one is: PS=RS × FR, and wherein, PS is described first reception reference symbol, RS is described local reference signal, and FR is described pilot tones domain response;
Described second reconstruct submodule, receive data symbol specifically for calculating described first according to formula two, described formula two is: PR=DS × FC, wherein, PR is described first reception data symbol, and DS is the frequency-region signal that described equilibrium exports, and FC is described data frequency domain response.
Further, described second Single-user detection module comprises:
First detection sub-module, obtains the second reception reference symbol for the reception reference symbol of described CoMPUE being deducted described first reception reference symbol;
Second detection sub-module, obtains the second reception data symbol for the reception data symbol of described CoMPUE being deducted described first reception data symbol;
3rd detection sub-module, carrying out Single-user detection for receiving data symbol according to described second reception reference symbol and described second to described CoMPUE, obtaining the soft bit information of described CoMPUE.
Multi-user combined detection method and base station in a kind of cooperative multicast system provided by the invention, namely support the multiuser detection of non-equiband, supports again the multiuser detection of equiband, improves the flexibility of scheduling of resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of multi-user combined detection method in a kind of cooperative multicast system of providing of one embodiment of the invention;
Fig. 2 is the flow chart of multi-user combined detection method in the another kind of cooperative multicast system that provides of one embodiment of the invention;
Fig. 3 is the structural representation of a kind of base station that one embodiment of the invention provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly; below in conjunction with the accompanying drawing in the embodiment of the present invention; technical scheme in the embodiment of the present invention is clearly and completely described; obviously; described embodiment is the present invention's part embodiment, instead of whole embodiments, based on the embodiment in the present invention; the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
The invention provides multi-user combined detection method in a kind of cooperative multicast system, see Fig. 1, the method comprises:
S1: carry out Single-user detection to this community UE, obtains the Single-user detection result of this community UE;
S2: the first reception reference symbol and first according to the resource intersection of described this community UE and the CoMPUE of described Single-user detection result reconstruct receives data symbol;
S3: receive data symbol according to described first reception reference symbol and described first and Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE;
S4: the main Serving cell sending to described CoMPUE corresponding described soft bit information.
Multi-user combined detection method in a kind of cooperative multicast system that the present embodiment provides, namely supports the multiuser detection of non-equiband, supports again the multiuser detection of equiband, improve the flexibility of scheduling of resource.
The Single-user detection result of the detected UE obtained by Single-user detection is comprised: local reference signal, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported, described S1 comprises: carry out Single-user detection to this community UE, obtains the local reference signal of this community UE, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported.
Further, described S2 comprises the step S21, the step S22 that do not illustrate in the drawings:
S21: according to described local reference signal and the described first reception reference symbol of described pilot tones domain response reconstruct of this community UE.
For example, described S21 comprises: calculate described first according to formula one and receive reference symbol, described formula one is: PS=RS × FR, and wherein, PS is described first reception reference symbol, and RS is described local reference signal, and FR is described pilot tones domain response.
S22: receive data symbol according to the frequency-region signal reconstruct described first that described data frequency domain response and the described equilibrium of this community UE export.
For example, described S22 comprises: calculate described first according to formula two and receive data symbol, described formula two is: PR=DS × FC, and wherein, PR is described first reception data symbol, DS is the frequency-region signal that described equilibrium exports, and FC is described data frequency domain response.
In addition, described S3 comprises the step S31, step S32, the step S33 that do not illustrate in the drawings:
S31: the reception reference symbol of described CoMPUE is deducted described first reception reference symbol and obtain the second reception reference symbol;
S32: the reception data symbol of described CoMPUE is deducted described first reception data symbol and obtain the second reception data symbol;
S33: receive data symbol according to described second reception reference symbol and described second and Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE;
Particularly, after obtaining the second reception reference symbol, then carry out channel estimating, after obtaining the second reception data symbol, then carry out equilibrium detection.
In addition, after described soft bit information is sent to main Serving cell, main Serving cell completes the addition summation of soft bit information, obtains the soft merging gain of above-mentioned CoMPUE, improves the detection perform of CoMPUE.
Multi-user combined detection method in a kind of cooperative multicast system that the embodiment of the present invention provides is described in detail below by a specific embodiment.In a CoMP system, Cell (community) 1 is main Serving cell, Cell2 is cooperation cell, UE1 is the edge UE of Cell1, UE1 is also the CoMPUE of Cell2 simultaneously, and UE2 is this community UE of Cell2, wherein, the power of UE2 is greater than UE1, and Cell1 is the main Serving cell that UE1 is corresponding.See Fig. 2, the method comprises:
201: Single-user detection is carried out to UE2, obtain the local reference signal of UE2, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported;
202: calculate described first according to formula one and receive reference symbol, described formula one is: PS=RS × FR, wherein, PS is described first reception reference symbol, and RS is described local reference signal, and FR is described pilot tones domain response;
203: calculate described first according to formula two and receive data symbol, described formula two is: PR=DS × FC, wherein, PR is described first reception data symbol, and DS is the frequency-region signal that described equilibrium exports, and FC is described data frequency domain response;
204: the reception reference symbol of described UE1 is deducted described first reception reference symbol and obtain the second reception reference symbol;
205: the reception data symbol of described UE1 is deducted described first reception data symbol and obtain the second reception data symbol;
206: receive data symbol according to described second reception reference symbol and described second and Single-user detection is carried out to described UE1, obtain the soft bit information of described UE1;
207: described soft bit information is sent to Cell1.
Multi-user combined detection method in a kind of cooperative multicast system provided by above-described embodiment, namely LTER10 system is applicable to, also LTER8 system and LTER9 system is applicable to, and can the multiuser detection that between UE, difference power is larger be carried out, interference and noise between UE can be reduced and, on the impact of CoMP system, improve the throughput of CoMP system.
Fig. 3 shows a kind of base station that the present embodiment provides, and comprising:
First Single-user detection module 301, for carrying out Single-user detection to this cell terminal UE, obtains the Single-user detection result of this community UE;
Reconstructed module 302, receives reference symbol and first for first of the resource intersection according to described this community UE and the CoMPUE of described Single-user detection result reconstruct and receives data symbol;
Second Single-user detection module 303, carrying out Single-user detection for receiving data symbol according to described first reception reference symbol and described first to described CoMPUE, obtaining the soft bit information of described CoMPUE;
Sending module 304, for the main Serving cell sending to described CoMPUE corresponding described soft bit information.
Described first Single-user detection module 301, specifically for carrying out Single-user detection to this community UE, obtains the local reference signal of this community UE, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported.
Described reconstructed module 302 comprises unshowned first reconstruct submodule 3021, second in Fig. 3 and reconstructs submodule 3022;
First reconstruct submodule 3021, for receiving reference symbol according to the described local reference signal of this community UE and described pilot tones domain response reconstruct described first;
Particularly, described first reconstruct submodule 3021, receives reference symbol specifically for calculating described first according to formula one, described formula one is: PS=RS × FR, and wherein, PS is described first reception reference symbol, RS is described local reference signal, and FR is described pilot tones domain response.
Second reconstruct submodule 3022, receives data symbol for the frequency-region signal reconstruct described first exported according to described data frequency domain response and the described equilibrium of this community UE.
Particularly, described second reconstruct submodule 3022, data symbol is received specifically for calculating described first according to formula two, described formula two is: PR=DS × FC, wherein, PR is described first reception data symbol, and DS is the frequency-region signal that described equilibrium exports, and FC is described data frequency domain response.
Described second Single-user detection module 303 comprises unshowned first detection sub-module 3031, second detection sub-module 3032, the 3rd detection sub-module 3033 in Fig. 3:
First detection sub-module 3031, obtains the second reception reference symbol for the reception reference symbol of described CoMPUE being deducted described first reception reference symbol;
Second detection sub-module 3032, obtains the second reception data symbol for the reception data symbol of described CoMPUE being deducted described first reception data symbol;
3rd detection sub-module 3033, carrying out Single-user detection for receiving data symbol according to described second reception reference symbol and described second to described CoMPUE, obtaining the soft bit information of described CoMPUE.
The content such as information interaction, implementation between each module in the said equipment, submodule, due to the inventive method embodiment based on same design, particular content can see in the inventive method embodiment describe, repeat no more herein.
It should be noted that, in this article, the relational terms of such as first and second and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element " being comprised " limited by statement, and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical factor.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in the storage medium of embodied on computer readable, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium in.
Finally it should be noted that: the foregoing is only preferred embodiment of the present invention, only for illustration of technical scheme of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. a multi-user combined detection method in cooperative multicast system, is characterized in that, comprising:
Single-user detection is carried out to this cell user equipment UE, obtains the Single-user detection result of this community UE;
Receive reference symbol and first according to first of the resource intersection of described this community UE and cooperative multipoint transmission CoMPUE of described Single-user detection result reconstruct and receive data symbol;
Receive data symbol according to described first reception reference symbol and described first and Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE;
The main Serving cell sending to described CoMPUE corresponding described soft bit information.
2. method according to claim 1, is characterized in that, describedly carries out Single-user detection to this cell user equipment UE, obtains the Single-user detection result of this community UE, comprising:
Single-user detection is carried out to this community UE, obtains the local reference signal of this community UE, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported.
3. method according to claim 2, is characterized in that, first of the described resource intersection according to described this community UE and cooperative multipoint transmission CoMPUE of described Single-user detection result reconstruct receives reference symbol and first and receives data symbol, comprising:
According to described local reference signal and the described first reception reference symbol of described pilot tones domain response reconstruct of this community UE;
Data symbol is received according to the frequency-region signal reconstruct described first that described data frequency domain response and the described equilibrium of this community UE export.
4. method according to claim 3, is characterized in that,
The described described local reference signal according to this community UE and described pilot tones domain response reconstruct described first receive reference symbol, comprising:
Calculate described first according to formula one and receive reference symbol, described formula one is: PS=RS × FR, and wherein, PS is described first reception reference symbol, and RS is described local reference signal, and FR is described pilot tones domain response;
The frequency-region signal reconstruct described first that the described described data frequency domain response according to this community UE and described equilibrium export receives data symbol, comprising:
Calculate described first according to formula two and receive data symbol, described formula two is: PR=DS × FC, and wherein, PR is described first reception data symbol, and DS is the frequency-region signal that described equilibrium exports, and FC is described data frequency domain response.
5. the method according to claim 3 or 4, is characterized in that, described according to described first receive reference symbol and described first receive data symbol Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE, comprising:
The reception reference symbol of described CoMPUE is deducted described first reception reference symbol and obtain the second reception reference symbol;
The reception data symbol of described CoMPUE is deducted described first reception data symbol and obtain the second reception data symbol;
Receive data symbol according to described second reception reference symbol and described second and Single-user detection is carried out to described CoMPUE, obtain the soft bit information of described CoMPUE.
6. a base station, is characterized in that, comprising:
First Single-user detection module, for carrying out Single-user detection to this cell user equipment UE, obtains the Single-user detection result of this community UE;
Reconstructed module, receives reference symbol and first for first of the resource intersection according to described this community UE and cooperative multipoint transmission CoMPUE of described Single-user detection result reconstruct and receives data symbol;
Second Single-user detection module, carrying out Single-user detection for receiving data symbol according to described first reception reference symbol and described first to described CoMPUE, obtaining the soft bit information of described CoMPUE;
Sending module, for the main Serving cell sending to described CoMPUE corresponding described soft bit information.
7. base station according to claim 6, it is characterized in that, described first Single-user detection module, specifically for carrying out Single-user detection to this community UE, obtains the local reference signal of this community UE, pilot tones domain response, data frequency domain response and the balanced frequency-region signal exported.
8. base station according to claim 7, is characterized in that, described reconstructed module comprises:
First reconstruct submodule, for receiving reference symbol according to the described local reference signal of this community UE and described pilot tones domain response reconstruct described first;
Second reconstruct submodule, receives data symbol for the frequency-region signal reconstruct described first exported according to described data frequency domain response and the described equilibrium of this community UE.
9. base station according to claim 8, is characterized in that,
Described first reconstruct submodule, receive reference symbol specifically for calculating described first according to formula one, described formula one is: PS=RS × FR, wherein, PS is described first reception reference symbol, and RS is described local reference signal, and FR is described pilot tones domain response;
Described second reconstruct submodule, receive data symbol specifically for calculating described first according to formula two, described formula two is: PR=DS × FC, wherein, PR is described first reception data symbol, and DS is the frequency-region signal that described equilibrium exports, and FC is described data frequency domain response.
10. base station according to claim 8 or claim 9, it is characterized in that, described second Single-user detection module comprises:
First detection sub-module, obtains the second reception reference symbol for the reception reference symbol of described CoMPUE being deducted described first reception reference symbol;
Second detection sub-module, obtains the second reception data symbol for the reception data symbol of described CoMPUE being deducted described first reception data symbol;
3rd detection sub-module, carrying out Single-user detection for receiving data symbol according to described second reception reference symbol and described second to described CoMPUE, obtaining the soft bit information of described CoMPUE.
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