CN105516030B - Multi-user combined detection method and base station in cooperative multicast system - Google Patents
Multi-user combined detection method and base station in cooperative multicast system Download PDFInfo
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Abstract
The present invention provides multi-user combined detection methods in a kind of cooperative multicast system and a kind of base station, this method to include：Single-user detection is carried out to this cell user equipment UE, obtains the Single-user detection result of this cell UE；The first of the resource intersection of described cell UE and cooperative multipoint transmission CoMP UE is reconstructed according to the Single-user detection result receives reference mark and the first reception data symbol；Reference mark and described first is received according to described first and receives data symbol to CoMP UE progress Single-user detections, obtains the soft bit information of the CoMP UE；The soft bit information is sent to the corresponding main serving cells of the CoMP UE.Multi-user combined detection method and a kind of base station in a kind of cooperative multicast system are provided through the invention, can improve the flexibility of scheduling of resource.
Description
Technical field
The present invention relates to multiuser detection sides in field of communication technology more particularly to a kind of cooperative multicast system
Method and base station.
Background technology
CoMP (Coordinated Multiple Points, cooperative multipoint transmission) refer to detached on geographical location it is more
A transfer point, collaboration participate in receiving one for the data transmission or joint of UE (User Equipment, user equipment)
The data that UE is sent, the multiple transmission point for participating in cooperation are often referred to the base station of different community.Edge UE is placed in several by CoMP technologies
On the same frequency of a base station, several base stations service for the UE simultaneously, to improve the covering performance of edge UE.For CoMP system,
Multiple cells can combine the uplink signal for receiving processing edge UE, to improve the handling capacity of edge UE.
In CoMP system, RSRP that base station is reported according to terminal (Reference Signal Receiving Power,
Reference Signal Received Power), judge adjacent area RSRP and this cell RSRP intensity, if the two difference is less than predetermined threshold value, selects
It is cooperation cell to select the adjacent cell, and the edge UE of this cell is determined as CoMP UE by cooperation cell there are when idling-resource.It is right
The cooperation cells CoMP, physical resource divide use according to the rules, and the frequency range of each cell is divided into CoMP frequency ranges and common frequency range, association
Make cell to avoid cooperation resource according to configuration.Uplink CoMP mainly uses joint reception scheme, is assisted by multiple base stations
Make reception mode, by main serving cell to cooperation cell transmission Lai Soft Inform ation merge, realize spatial domain macro-diversity to improve
Transmission performance improves cell edge UE uplink throughputs.In order to improve band resource utilization rate, system is by multiple UE identical
Running time-frequency resource transmission data, to further increase CoMP system handling capacity, and the interference size between UE will directly affect system
Overall performance.
In the prior art, the more common scheme for solving CoMP UE and this cell UE interference in cooperation cell be will cooperate it is small
The channel matrix of CoMP UE and this cell UE in area aggregate into a big matrix, and multiuser detection is done in the docking collection of letters number,
Multiple UE information are extracted respectively, and the information of CoMP UE is passed to main serving cell by cooperation cell, completes to assist in main serving cell
The soft bit information for making UE merges.LTE (Long Term Evolution, long term evolution) R10 uplinks DM-RS
(Demodulation Reference Signals, demodulated reference signal) is multiplexed in CS (Cyclic Shift, cyclic shift)
On the basis of increase OCC codes (Orthogonal Cover Code, orthogonal mask) to further increase channel estimation reliability,
It can support that UE is matched under multiuser detection occupies PRB (Physical Resource Blocks, Physical Resource Block) size
Not equal situation.And the uplink multi-users joint-detection pairing UE of LTE R8/R9 systems needs shared PRB identical, does not support non-
The multiuser detection of the CoMP UE and this cell UE of equiband will seriously affect the flexibility of scheduling of resource, limit CoMP
Application scenarios.
As can be seen from the above description, in multi-user combined detection method in the prior art, the flexibility of scheduling of resource compared with
It is low.
Invention content
The present invention provides multi-user combined detection method and base stations in a kind of cooperative multicast system, can improve money
The flexibility of source scheduling.
The present invention provides multi-user combined detection methods in a kind of cooperative multicast system, including：
Single-user detection is carried out to this cell user equipment UE, obtains the Single-user detection result of this cell UE；
Described cell UE is reconstructed according to the Single-user detection result to overlap with the resource of cooperative multipoint transmission CoMP UE
Partial first receives reference mark and first and receives data symbol；
Reference mark and described first, which is received, according to described first receives data symbol to CoMP UE progress single users
Detection, obtains the soft bit information of the CoMP UE；
The soft bit information is sent to the corresponding main serving cells of the CoMP UE.
Further, described that Single-user detection is carried out to this cell user equipment UE, obtain the single user inspection of this cell UE
It surveys as a result, including：
Single-user detection is carried out to this cell UE, obtains the local reference signal, pilot tone frequency domain response, data of this cell UE
The frequency-region signal of frequency domain response and balanced output.
Further, described that described cell UE and cooperative multipoint transmission CoMP are reconstructed according to the Single-user detection result
The first of the resource intersection of UE receives reference mark and first receives data symbol, including：
Reference is received according to the local reference signal of this cell UE and pilot tone frequency domain response reconstruct described first
Symbol；
It is connect according to the frequency-region signal reconstruct described first of the data frequency domain response of this cell UE and the balanced output
Receive data symbol.
Further, described according to described in the local reference signal of this cell UE and pilot tone frequency domain response reconstruct
First receives reference mark, including：
It is calculated described first according to formula one and receives reference mark, the formula one is：PS=RS × FR, wherein
PS is the first reception reference mark, and RS is the local reference signal, and FR is the pilot tone frequency domain response；
The frequency-region signal reconstruct of the data frequency domain response according to this cell UE and the balanced output described the
One receives data symbol, including：
It is calculated described first according to formula two and receives data symbol, the formula two is：PR=DS × FC, wherein
PR is the first reception data symbol, and DS is the frequency-region signal of the balanced output, and FC is the data frequency domain response.
Further, described to receive reference mark and the first reception data symbol to the CoMP according to described first
UE carries out Single-user detection, obtains the soft bit information of the CoMP UE, including：
The reception reference mark of the CoMP UE is subtracted into the first reception reference mark and obtains the second reception with reference to symbol
Number；
The reception data symbol of the CoMP UE is subtracted into the first reception data symbol and obtains the second reception data symbols
Number；
Reference mark and described second, which is received, according to described second receives data symbol to CoMP UE progress single users
Detection, obtains the soft bit information of the CoMP UE.
On the other hand, the present invention provides a kind of base stations, including：
First Single-user detection module obtains this cell UE for carrying out Single-user detection to this cell user equipment UE
Single-user detection result；
Reconstructed module, for reconstructing described cell UE and cooperative multipoint transmission CoMP according to the Single-user detection result
The first of the resource intersection of UE receives reference mark and first and receives data symbol；
Second Single-user detection module receives data symbol for receiving reference mark and described first according to described first
Single-user detection is carried out to the CoMP UE, obtains the soft bit information of the CoMP UE；
Sending module, for the soft bit information to be sent to the corresponding main serving cells of the CoMP UE.
Further, the first Single-user detection module is specifically used for carrying out Single-user detection to this cell UE, obtain
The local reference signal of this cell UE, the frequency-region signal of pilot tone frequency domain response, data frequency domain response and balanced output.
Further, the reconstructed module includes：
First reconstruct submodule, is used for the local reference signal according to this cell UE and the pilot tone frequency domain response weight
First receives reference mark described in structure；
Second reconstruct submodule, the frequency domain for being exported according to the data frequency domain response and the equilibrium of this cell UE
First receives data symbol described in signal reconstruction.
Further, the first reconstruct submodule, joins specifically for being calculated described first according to formula one and receiving
Symbol is examined, the formula one is：PS=RS × FR, wherein PS is the first reception reference mark, and RS is the local reference
Signal, FR are the pilot tone frequency domain response；
The second reconstruct submodule receives data symbol, institute specifically for being calculated described first according to formula two
Stating formula two is：PR=DS × FC, wherein PR is the first reception data symbol, and DS is the frequency domain letter of the balanced output
Number, FC is the data frequency domain response.
Further, the second Single-user detection module includes：
First detection sub-module is received for the reception reference mark of the CoMP UE to be subtracted described first with reference to symbol
Number obtain the second reception reference mark；
Second detection sub-module receives data symbols for the reception data symbol of the CoMP UE to be subtracted described first
Number obtain the second reception data symbol；
Third detection sub-module receives data symbol to institute for receiving reference mark and described second according to described second
It states CoMP UE and carries out Single-user detection, obtain the soft bit information of the CoMP UE.
Multi-user combined detection method and base station in a kind of cooperative multicast system provided by the invention are supported non-etc.
The multiuser detection of bandwidth, and support the multiuser detection of equiband, improve the flexibility of scheduling of resource.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the stream of multi-user combined detection method in a kind of cooperative multicast system that one embodiment of the invention provides
Cheng Tu；
Fig. 2 is multi-user combined detection method in another cooperative multicast system that one embodiment of the invention provides
Flow chart；
Fig. 3 is a kind of structural schematic diagram for base station that one embodiment of the invention provides.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides multi-user combined detection methods in a kind of cooperative multicast system, referring to Fig. 1, this method packet
It includes：
S1：Single-user detection is carried out to this cell UE, obtains the Single-user detection result of this cell UE；
S2：The of the resource intersection of described cell UE and CoMP UE is reconstructed according to the Single-user detection result
One, which receives reference mark and first, receives data symbol；
S3：Reference mark and described first, which is received, according to described first receives data symbol to CoMP UE progress lists
User detects, and obtains the soft bit information of the CoMP UE；
S4：The soft bit information is sent to the corresponding main serving cells of the CoMP UE.
Multi-user combined detection method in a kind of cooperative multicast system provided in this embodiment, that is, support non-equiband
Multiuser detection, and support equiband multiuser detection, improve the flexibility of scheduling of resource.
The Single-user detection result of detected UE obtained by Single-user detection includes：Local reference signal, pilot tones
The frequency-region signal of domain response, data frequency domain response and balanced output, the S1 include：Single-user detection is carried out to this cell UE,
Obtain the local reference signal of this cell UE, the frequency-region signal of pilot tone frequency domain response, data frequency domain response and balanced output.
Further, the S2 includes the step S21 being not shown, step S22：
S21：It is received according to the local reference signal of this cell UE and pilot tone frequency domain response reconstruct described first
Reference mark.
For example, the S21 includes：It is calculated described first according to formula one and receives reference mark, the formula
One is：PS=RS × FR, wherein PS is the first reception reference mark, and RS is the local reference signal, and FR is described leads
Frequent domain response.
S22：According to the frequency-region signal reconstruct of the data frequency domain response of this cell UE and the balanced output described the
One receives data symbol.
For example, the S22 includes：It is calculated described first according to formula two and receives data symbol, the formula
Two are：PR=DS × FC, wherein PR is the first reception data symbol, and DS is the frequency-region signal of the balanced output, and FC is
The data frequency domain response.
In addition, the S3 includes the step S31, step S32, step S33 being not shown：
S31：The reception reference mark of the CoMP UE is subtracted into the first reception reference mark and obtains the second reception ginseng
Examine symbol；
S32：The reception data symbol of the CoMP UE is subtracted into the first reception data symbol and obtains the second reception number
According to symbol；
S33：Reference mark and described second, which is received, according to described second receives data symbol to CoMP UE progress lists
User detects, and obtains the soft bit information of the CoMP UE；
Specifically, after obtaining the second reception reference mark, then channel estimation is carried out, is obtaining the second reception data symbol
Afterwards, then balanced detection is carried out.
In addition, after the soft bit information is sent to main serving cell, main serving cell completes soft bit information
It is added summation, obtains the soft merging gain of above-mentioned CoMP UE, improves the detection performance of CoMP UE.
Carry out a kind of cooperative multipoint transmission that the present invention will be described in detail embodiment provides below by a specific embodiment
Multi-user combined detection method in system.In a CoMP system, Cell (cell) 1 is main serving cell, and Cell2 is cooperation
Cell, UE1 is the edge UE of Cell1, while UE1 is also the CoMP UE of Cell2, and UE2 is this cell UE of Cell2, wherein
The power of UE2 is more than UE1, and Cell1 is the corresponding main serving cells of UE1.Referring to Fig. 2, this method includes：
201：Single-user detection is carried out to UE2, the local reference signal, pilot tone frequency domain response, data frequency domain for obtaining UE2 are rung
It should be with the frequency-region signal of equilibrium output；
202：It is calculated described first according to formula one and receives reference mark, the formula one is：PS=RS × FR,
In, PS is the first reception reference mark, and RS is the local reference signal, and FR is the pilot tone frequency domain response；
203：It is calculated described first according to formula two and receives data symbol, the formula two is：PR=DS × FC,
In, PR is the first reception data symbol, and DS is the frequency-region signal of the balanced output, and FC is the data frequency domain response；
204：The reception reference mark of the UE1 is subtracted into the first reception reference mark and obtains the second reception with reference to symbol
Number；
205：The reception data symbol of the UE1 is subtracted into the first reception data symbol and obtains the second reception data symbols
Number；
206：Reference mark and described second, which is received, according to described second receives data symbol to UE1 progress single users
Detection, obtains the soft bit information of the UE1；
207：The soft bit information is sent to Cell1.
Multi-user combined detection method in a kind of cooperative multicast system provided by above-described embodiment, that is, be suitable for
LTE R10 systems are also applied for LTE R8 systems and LTE R9 systems, and can carry out the larger multi-user of difference power between UE
Joint-detection can reduce interference and influence of the noise to CoMP system between UE, improve the handling capacity of CoMP system.
Fig. 3 shows a kind of base station provided in this embodiment, including：
First Single-user detection module 301 obtains this cell UE's for carrying out Single-user detection to this cell terminal UE
Single-user detection result；
Reconstructed module 302, the resource for reconstructing described cell UE and CoMP UE according to the Single-user detection result
The first of intersection receives reference mark and first and receives data symbol；
Second Single-user detection module 303 receives data for receiving reference mark and described first according to described first
Symbol carries out Single-user detection to the CoMP UE, obtains the soft bit information of the CoMPUE；
Sending module 304, for the soft bit information to be sent to the corresponding main serving cells of the CoMP UE.
The first Single-user detection module 301 is specifically used for carrying out Single-user detection to this cell UE, obtains this cell
The local reference signal of UE, the frequency-region signal of pilot tone frequency domain response, data frequency domain response and balanced output.
The reconstructed module 302 includes unshowned first reconstruct submodule 3021, second reconstruct submodule in Fig. 3
3022；
First reconstruct submodule 3021, for being rung according to the local reference signal of this cell UE and the pilot tone frequency domain
Described first should be reconstructed and receive reference mark；
Specifically, the first reconstruct submodule 3021, receives specifically for being calculated described first according to formula one
Reference mark, the formula one are：PS=RS × FR, wherein PS is the first reception reference mark, and RS is the local ginseng
Signal is examined, FR is the pilot tone frequency domain response.
Second reconstruct submodule 3022, for what is exported according to the data frequency domain response and the equilibrium of this cell UE
Frequency-region signal reconstruct described first receives data symbol.
Specifically, the second reconstruct submodule 3022, receives specifically for being calculated described first according to formula two
Data symbol, the formula two are：PR=DS × FC, wherein PR is the first reception data symbol, and DS is that the equilibrium is defeated
The frequency-region signal gone out, FC are the data frequency domain response.
The second Single-user detection module 303 includes the detection of unshowned first detection sub-module 3031, second in Fig. 3
Submodule 3032, third detection sub-module 3033：
First detection sub-module 3031 is joined for subtracting described first and receiving the reception reference mark of the CoMP UE
It examines symbol and obtains the second reception reference mark；
Second detection sub-module 3032 receives number for the reception data symbol of the CoMP UE to be subtracted described first
The second reception data symbol is obtained according to symbol；
Third detection sub-module 3033 receives data symbol for receiving reference mark and described second according to described second
Single-user detection is carried out to the CoMP UE, obtains the soft bit information of the CoMP UE.
The contents such as information exchange, the implementation procedure between each module, submodule in above equipment, due to side of the present invention
Method embodiment is based on same design, and particular content can be found in the narration in the method for the present invention embodiment, and details are not described herein again.
It should be noted that herein, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is existed without necessarily requiring or implying between these entities or operation
Any actual relationship or order.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment including a series of elements includes not only those elements,
But also include other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence " including one ", is not arranged
Except there is also other identical factors in the process, method, article or apparatus that includes the element.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in computer-readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or light
In the various media that can store program code such as disk.
Finally, it should be noted that：The foregoing is merely presently preferred embodiments of the present invention, is merely to illustrate the skill of the present invention
Art scheme, is not intended to limit the scope of the present invention.Any modification for being made all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., are included within the scope of protection of the present invention.
Claims (8)
1. multi-user combined detection method in a kind of cooperative multicast system, which is characterized in that including：
Single-user detection is carried out to this cell user equipment UE, obtains the Single-user detection result of this cell UE；
The resource intersection of described cell UE and cooperative multipoint transmission CoMP UE are reconstructed according to the Single-user detection result
First receive reference mark and first receive data symbol；
Reference mark and described first, which is received, according to described first receives data symbol to CoMP UE progress single user inspections
It surveys, obtains the soft bit information of the CoMP UE：The reception reference mark of the CoMP UE is subtracted described first and receives ginseng
It examines symbol and obtains the second reception reference mark；The reception data symbol of the CoMP UE is subtracted described first and receives data symbols
Number obtain the second reception data symbol；Reference mark and described second, which is received, according to described second receives data symbol to described
CoMP UE carry out Single-user detection, obtain the soft bit information of the CoMP UE；
The soft bit information is sent to the corresponding main serving cells of the CoMP UE.
2. according to the method described in claim 1, it is characterized in that, described carry out single user inspection to this cell user equipment UE
It surveys, obtains the Single-user detection of this cell UE as a result, including：
Single-user detection is carried out to this cell UE, obtains the local reference signal, pilot tone frequency domain response, data frequency domain of this cell UE
The frequency-region signal of response and balanced output.
3. according to the method described in claim 2, it is characterized in that, described reconstruct described according to the Single-user detection result
The first of the resource intersection of cell UE and cooperative multipoint transmission CoMP UE receives reference mark and first and receives data symbols
Number, including：
Reference mark is received according to the local reference signal of this cell UE and pilot tone frequency domain response reconstruct described first；
Number is received according to the frequency-region signal reconstruct described first of the data frequency domain response of this cell UE and the balanced output
According to symbol.
4. according to the method described in claim 3, it is characterized in that,
It is described to receive and refer to according to the local reference signal of this cell UE and pilot tone frequency domain response reconstruct described first
Symbol, including：
It is calculated described first according to formula one and receives reference mark, the formula one is：PS=RS × FR, wherein PS is
Described first receives reference mark, and RS is the local reference signal, and FR is the pilot tone frequency domain response；
It is described to be connect according to the data frequency domain response of this cell UE and the frequency-region signal reconstruct described first of the balanced output
Data symbol is received, including：
It is calculated described first according to formula two and receives data symbol, the formula two is：PR=DS × FC, wherein PR is
Described first receives data symbol, and DS is the frequency-region signal of the balanced output, and FC is the data frequency domain response.
5. a kind of base station, which is characterized in that including：
First Single-user detection module obtains the list of this cell UE for carrying out Single-user detection to this cell user equipment UE
User's testing result；
Reconstructed module, for reconstructing described cell UE and cooperative multipoint transmission CoMP UE according to the Single-user detection result
Resource intersection first receive reference mark and first receive data symbol；
Second Single-user detection module receives data symbol to institute for receiving reference mark and described first according to described first
It states CoMP UE and carries out Single-user detection, obtain the soft bit information of the CoMP UE；
Sending module, for the soft bit information to be sent to the corresponding main serving cells of the CoMP UE；
Wherein, the second Single-user detection module includes：
First detection sub-module is obtained for the reception reference mark of the CoMP UE to be subtracted the first reception reference mark
Reference mark is received to second；
Second detection sub-module is obtained for the reception data symbol of the CoMP UE to be subtracted the first reception data symbol
Data symbol is received to second；
Third detection sub-module receives data symbol to described for receiving reference mark and described second according to described second
CoMP UE carry out Single-user detection, obtain the soft bit information of the CoMP UE.
6. base station according to claim 5, which is characterized in that the first Single-user detection module is specifically used for this
Cell UE carries out Single-user detection, obtains the local reference signal of this cell UE, pilot tone frequency domain response, data frequency domain response and
Weigh the frequency-region signal exported.
7. base station according to claim 6, which is characterized in that the reconstructed module includes：
First reconstruct submodule, for reconstructing institute according to the local reference signal of this cell UE and the pilot tone frequency domain response
State the first reception reference mark；
Second reconstruct submodule, the frequency-region signal for being exported according to the data frequency domain response and the equilibrium of this cell UE
It reconstructs described first and receives data symbol.
8. base station according to claim 7, which is characterized in that
The first reconstruct submodule receives reference mark, the public affairs specifically for being calculated described first according to formula one
Formula one is：PS=RS × FR, wherein PS is the first reception reference mark, and RS is the local reference signal, and FR is described
Pilot tone frequency domain response；
The second reconstruct submodule receives data symbol, the public affairs specifically for being calculated described first according to formula two
Formula two is：PR=DS × FC, wherein PR is the first reception data symbol, and DS is the frequency-region signal of the balanced output, FC
For the data frequency domain response.
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| US20130077581A1 (en) * | 2011-09-23 | 2013-03-28 | Samsung Electronics Co. Ltd. | Method and apparatus for transmitting and receiving feedback for cooperative communication system |
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