CN106559810A - A kind of signal processing method and system of heterogeneous network multi-cell system - Google Patents
A kind of signal processing method and system of heterogeneous network multi-cell system Download PDFInfo
- Publication number
- CN106559810A CN106559810A CN201510627380.6A CN201510627380A CN106559810A CN 106559810 A CN106559810 A CN 106559810A CN 201510627380 A CN201510627380 A CN 201510627380A CN 106559810 A CN106559810 A CN 106559810A
- Authority
- CN
- China
- Prior art keywords
- vector
- macro
- pico
- base stations
- cell base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides the signal processing method and system of a kind of heterogeneous network multi-cell system.A kind of signal processing method of heterogeneous network multi-cell system includes：It is zero to make Pico community users receive side isomorphism presence of intercell interference component, while Pico cell base stations side precoding vector is arranged with high specific sending method, obtains Pico community user receiving terminal lateral beam figuration vector sum Pico cell base stations side precoding vector；According to Pico community user receiving terminal lateral beams figuration vector, the linear space of Macro cell base stations side precoding vector is obtained；Process obtains Macro community user receiving terminal lateral beam figuration vector sum Macro cell base stations side precoding vector；It is configured in default receiving end signal model, obtains receiving end signal estimated value.The present invention maximizes useful channel gain, reduces the impact of user's receiving terminal noise signal, while realize.
Description
Technical field
The present invention relates to system signal process field, more particularly to a kind of signal of heterogeneous network multi-cell system
Processing method and system.
Background technology
At present, it is in LTE (long Term Evolution) heterogeneous network (HetNet) multi-cell system, multiple
Pico (femto base station) cell is superimposed upon in Macro (macro base station) cell, can pole by frequency multiplexing mode
It is big to improve system spectral efficiency, it is a key technology direction of 4G, 5G technological evolvement.But due to multilamellar
The superposition of secondary cell, can produce serious interference problem between community user.It is this to disturb the source that has levels,
Including isomery presence of intercell interference, isomorphism presence of intercell interference and multi-user interference.In existing program, to minizone
Interference, a kind of mode is the part for being regarded white noise at receiving terminal is using methods such as MMSE
Reason, one kind is to be regarded coloured noise, is entered using IRC (Interference Reject Combing) mode
Row is processed, and this kind of method suppresses interference by the way of noise variance, but this will interference directly regards noise
Processing mode be inaccurate, can causing property loss of energy；Another method is using complete inhibition interference
Mode, obtains accurate interference channel information, and the methods of such as ZF (ZF) etc. in the way of relevant eliminate noise,
But this method often ignores the process of noise, in noise limited system, although interference is completely eliminated, make an uproar
Sound is excessive, and useful channel gain does not obtain the enhancing of equal extent, and performance can also decline.Again, it is existing
Process in method to disturbing, is often based upon isomorphism presence of intercell interference model, and heterogeneous network (HetNet) is more
Cell system has some more apparent key properties for being different from isomorphism presence of intercell interference, and such as MPS process strengthens
The impact of technology (Range Expansion, RE) to interference characteristic etc., and be underutilized.
The content of the invention
The invention provides the signal processing method and system of a kind of heterogeneous network multi-cell system, for solving
The problem of interference and noise in removal heterogeneous network multi-cell system.
The embodiment of the present invention is employed the following technical solutions：
The invention provides a kind of signal processing method of heterogeneous network multi-cell system, the method includes following
Step:
In making default receiving end signal model, Pico community users reception side isomorphism presence of intercell interference component is
Zero, while Pico cell base stations side precoding vector is arranged with high specific sending method, obtain Pico community users
Receiving terminal lateral beam figuration vector sum Pico cell base station side precoding vector；
According to Pico community users receiving terminal lateral beam figuration vector, obtain Macro cell base stations side and prelist
The linear space of code vector；
Process obtains the Macro community users receiving terminal lateral beam figuration vector sum in Macro cell base stations side
Macro cell base stations side precoding vector in the linear space of precoding vector；
By Pico community user receiving terminal lateral beams figuration vector, Pico cell base stations side precoding vector, Macro
Macro cell base stations side precoding vector described in community user receiving terminal lateral beam figuration vector sum is configured at pre-
If receiving end signal model in, obtain receiving end signal estimated value.
Preferably, it is described according to Pico community users receiving terminal lateral beam figuration vector, obtain Macro little
The linear space of area's base station side precoding vector, including：
According to Pico community user receiving terminal lateral beams figuration vector, Macro cell base stations are obtained to Pico cells
The equivalent interference channel of isomery cell of base station；
By isomery cell equivalent interference channel of the Macro cell base stations to Pico cell base stations, Macro is obtained
Cell base station side precoding linear space.
Preferably, process that to obtain the Macro community users receiving terminal lateral beam figuration vector sum little in Macro
Macro cell base stations side precoding vector in the linear space of area's base station side precoding vector includes：
In making the receiving end signal model, Macro community users receive multi-user interference component in the cell of side
It is zero, while Macro cell receiving terminal lateral beams figuration vector is arranged by maximum-ratio combing mode, to obtain
Macro cell base stations side precoding vector in the linear space of Macro cell base stations side precoding vector；
Receive Macro cells in the receiving end signal model according to Macro cell base stations side precoding vector
Side wave beam forming vector is arranged by maximum-ratio combing mode, obtains Macro community user receiving terminal lateral beams
Figuration vector.
Preferably, the Pico cells are the Pico cells using MPS process enhancement techniques.
Preferably, it is described to make Pico community users reception side isomorphism minizone in default receiving end signal model
Before interference components are zero, also include：The receiving end signal model of heterogeneous network multi-cell system is set:WhereinFor receiving end signal estimated value,K, q are user
Numbering, p (q) are base station number, Hk,p(q)For channel matrix, sqFor the data symbol of user q, nkFor white noise
Vector, wkFor user's k receiving terminal lateral beams figuration vector, vqAssign for wave beam of the base station side corresponding to user q
Property vector.
Present invention also offers a kind of signal processing system of heterogeneous network multi-cell system, the system includes：
Pico cells vector acquiring unit, for receiving Pico community users in default receiving end signal model
Side isomorphism presence of intercell interference component is zero, while Pico cell base stations side precoding vector is with high specific sender
Formula arrange, obtain Pico community users receiving terminal lateral beam figuration vector sum Pico cell base station side precoding to
Amount；
Linear space acquiring unit, for according to Pico community users receiving terminal lateral beam figuration vector, obtaining
To the linear space of Macro cell base stations side precoding vector；
Macro cells vector acquiring unit, obtains the Macro community users receiving terminal lateral beam for processing
Macro cell base station side of the figuration vector sum in the linear space of Macro cell base stations side precoding vector is pre-
Coding vector；
Receiving end signal estimation unit, for will Pico community user receiving terminal lateral beams figuration vector, Pico it is little
Area's base station side precoding vector, Macro cells described in Macro community user receiving terminal lateral beam figuration vector sum
Base station side precoding vector is configured at default receiving end signal model, obtains receiving end signal estimated value.
Preferably, the linear space acquiring unit includes that equivalent interference channel acquisition module and linear space are obtained
Delivery block, wherein：
Equivalent interference channel acquisition module, for according to Pico community user receiving terminal lateral beams figuration vector, obtaining
To isomery cell equivalent interference channel of the Macro cell base stations to Pico cell base stations；
Linear space acquisition module, for by Macro cell base stations to isomery cell of Pico cell base stations etc.
Effect interference channel, obtains the linear space of Macro cell base stations side precoding.
Preferably, Macro cells vector acquiring unit includes precoding vector acquisition module and wave beam forming vector
Acquisition module, wherein：
The precoding vector acquisition module, for connecing Macro community users in the receiving end signal model
In the cell of receiving end side, multi-user interference component is zero, while Macro cell receiving terminal lateral beam figuration vectors pass through
Maximum-ratio combing mode is arranged, to obtain in the linear space of Macro cell base stations side precoding vector
Macro cell base stations side precoding vector；
The wave beam forming vector acquisition module, described in being made according to Macro cell base stations side precoding vector
In receiving end signal model, Macro cells receiving terminal lateral beam figuration vector is arranged by maximum-ratio combing mode,
Obtain Macro community user receiving terminal lateral beams figuration vector.
Preferably, the Pico cells are the Pico cells using MPS process enhancement techniques.
Preferably, also including receiving end signal model setting unit, for arranging heterogeneous network multi-cell system
Receiving end signal model:
WhereinFor receiving end signal estimated value,K, q are use
Family is numbered, and p (q) is base station number, Hk,p(q)For channel matrix, sqFor the data symbol of user q, nkFor white noise
Sound vector, wkFor user's k receiving terminal lateral beams figuration vector, vqThe wave beam of user q is corresponded to for base station side
Inborn nature vector.
Compared with prior art, the signal processing method of a kind of heterogeneous network multi-cell system that the present invention is provided
And system, have the advantages that：
The present invention maximizes useful channel gain by MRT/MRC receiving/transmission methods, increases signal to noise ratio, so as to
The impact of user's receiving terminal noise signal is reduced, side interference is received by the pre- elimination of base station side interference, user
Integrated processes being eliminated afterwards and eliminating multi-level interference, realizing reduces eliminating isomery while the impact of noise signal
Disturbed in network multi-cell system at many levels, for MPS process enhancement techniques (Range Expansion, RE)
Impact to interference characteristic, can set up corresponding simplified approximate systematic model, simplify processing procedure.
Description of the drawings
Fig. 1 is a kind of side of the signal processing method embodiment of heterogeneous network multi-cell system that the present invention is provided
Method flow chart one.
Fig. 2 is a kind of side of the signal processing method embodiment of heterogeneous network multi-cell system that the present invention is provided
Method flowchart 2.
Fig. 3 is a kind of side of the signal processing method embodiment of heterogeneous network multi-cell system that the present invention is provided
Method flow chart 3.
Fig. 4 is a kind of side of the signal processing method embodiment of heterogeneous network multi-cell system that the present invention is provided
Method flow chart four.
Fig. 5 is a kind of knot of the signal processing system embodiment of heterogeneous network multi-cell system that the present invention is provided
Structure block diagram one.
Fig. 6 is a kind of knot of the signal processing system embodiment of heterogeneous network multi-cell system that the present invention is provided
Structure block diagram two.
Fig. 7 is a kind of knot of the signal processing system embodiment of heterogeneous network multi-cell system that the present invention is provided
Structure block diagram three.
Fig. 8 is a kind of signal processing method embodiment of heterogeneous network multi-cell system that the present invention is provided and is
The instance system block diagram of system embodiment.
Specific embodiment
For make present invention solves the technical problem that, the technical scheme that adopts and the technique effect that reaches it is more clear
Chu, is described in further detail to the technical scheme of the embodiment of the present invention below in conjunction with accompanying drawing, it is clear that
Described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Embodiment in bright, those skilled in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
Fig. 1 to Fig. 4 illustrates a kind of signal processing of the heterogeneous network multi-cell system provided according to the present invention
The method flow diagram of embodiment of the method.A kind of signal processing method of heterogeneous network multi-cell system is mainly by different
Network forming network multi-cell system is performing.The heterogeneous network multi-cell system of the present embodiment is that LTE heterogeneous networks are more
Cell system, wherein, including at least one Macro cells and at least two Pico cells, in Macro cells
Including a Macro cell base station and at least two Macro community users, Pico cells include that a Pico is little
Area base station and Pico community users.Macro cell base stations are the Macro base stations in Macro cells, Pico cells
Base station is the Pico base stations in Pico cells, and Macro community users are the receiving terminal in Macro cells, Pico
Community user is the receiving terminal in Pico cells.To Pico community users, the reception signal includes that two kinds are done
Disturb：Isomery presence of intercell interference and isomorphism presence of intercell interference.To Macro community users, receiving signal also includes two
Plant interference：Multi-user interference in isomery presence of intercell interference and cell.The method is comprised the following steps：
S11：The receiving end signal model of heterogeneous network multi-cell system is set.
Specifically, the receiving end signal model is(a1), whereinFor receiving terminal
The receiving end signal estimated value of Signal estimation value, i.e. user k,K, q are Customs Assigned Number, p (q)
For base station number, Hk,p(q)For channel matrix, sqFor the data symbol of user q, nkFor white noise vector, wkFor
User's k receiving terminal lateral beams figuration vector, vqThe precoding vector of user q is corresponded to for base station side.User k
Can be Macro community users and Pico community users, user q can be that Macro community users and Pico are little
Area user.General Pico cells are the Pico cells using MPS process enhancement techniques, are strengthened by MPS process
(Range Expansion, RE) technology, ignores interference of the Pico cells to Macro community users,
Therefore, simplify can processing procedure.
For example, such as Fig. 8, LTE heterogeneous networks multi-cell system is by two Pico cells, a Macro cell
Isomery multi-cell system is constituted, two Pico cells are superimposed upon in a Macro cell, BS1, BS3 are Pico
Base station, BS2 are Macro base stations, have a Pico community user, have in Macro cells in each Pico cell
Two Macro community users.User1 be BS1 community users, User4 be BS3 community users, User2,
User3 is BS2 community users.The receiving end signal model isWhereinFor the receiving end signal estimated value of receiving end signal estimated value, i.e. user k,K, q are use
Family is numbered, and p (q) is base station number, Hk,p(q)For channel matrix, sqFor the data symbol of user q, nkFor white noise
Sound vector, wkFor user's k receiving terminal lateral beams figuration vector, vqFor base station side prelisting corresponding to user q
Code vector.User k can be Macro community users and Pico community users, and user q can be little for Macro
Area user and Pico community users.Then 1≤k≤4 in formula (a2), subscript p (1)=1, p (2)=2, p (3)=2,
P (4)=3.w1、w4For Pico community user receiving terminal lateral beams figuration vector, w2、w3For Macro cells
User's receiving terminal lateral beam figuration vector, v1、v4For Pico cell base stations side precoding vector, v2、v3Macro
Cell base station side precoding vector, each user belonging to each base station to its cell send single current data.
Pico cells strengthen (Range Expansion, RE) technology by MPS process, make Pico cells pair
The interference of Macro community users can be ignored, and obtain the approximated channel structure of Fig. 8, i.e.,：BS1 to User2,
The isomery area interference channel H of User32,1、H3,1, and BS3 done to the isomery cell of User2, User3
Disturb channel H2,3、H3,3Can process according to null matrix, so, it is believed that Macro community users in actual treatment
Receive signal and only exist multi-user interference in cell.
S12：In making default receiving end signal model, Pico community users receive side isomorphism presence of intercell interference point
Amount is zero, while Pico cell base stations side precoding vector is arranged with high specific sending method, obtains Pico cells
User's receiving terminal lateral beam figuration vector sum Pico cell base station side precoding vector.
Wherein, Pico cell base stations side precoding vector is arranged with high specific sending method, in base station sending side most
The efficient channel gain of bigization useful signal, can reduce the impact of receiving terminal noise signal.Make default connecing
It is zero that in receiver signal model, Pico community users receive side isomorphism presence of intercell interference component, can eliminate Pico
Isomorphism presence of intercell interference.
For example, Pico base stations transmitting terminal adopts high specific sending method (MRT, Maximum Ratio
Transmission precoding) is carried out, and the efficient channel gain of useful signal is maximized in base station sending side, with
Reduce the impact of receiving terminal noise signal.I.e.：
To Pico isomorphism presence of intercell interference, receiving side is processed in the following way.
Pico community users receive signal includes that two parts are disturbed：From the isomery presence of intercell interference of Macro base stations
With Pico isomorphism presence of intercell interference.To eliminate Pico isomorphism presence of intercell interference, in receiving end signal model, Pico is little
It is zero that area user receives side isomorphism presence of intercell interference component, that is, need to meet:
To User4:
To User1:
Bring (a3), (a4) into (a5), (a6), then have
To User4,
To User1,
Released by (a8), (a9):
(a10) be generalized eigenvalue problem, wherein λ is characterized value, then the receiving terminal wave beam inborn nature of User1
Vector is：
Wherein eig () represent take feature to
Amount.
The receiving terminal wave beam inborn nature vector of User4 is：
Wherein Null () is represented and is taken core operation.
Processed by the reception wave beam inborn nature of (a11), (a12), User1 and User2 can will be Pico isomorphisms little
Interval interference is eliminated.And in passing through to bring (a11), (a12) into (a5), (a6) respectively, obtain Pico
Cell base station side precoding vector.
S13：According to Pico community user receiving terminal lateral beams figuration vector, Macro cell base stations side is obtained pre-
The linear space of coding vector.
Specifically, S13 includes S131 to S132.
S131：According to Pico community user receiving terminal lateral beams figuration vector, Macro cell base stations are obtained to Pico
The equivalent interference channel of isomery cell of cell base station.
As above example, the equivalent interference channel of isomery cell of Pico community user User1 is：
Macro base stations to the equivalent interference channel of isomery cell of Pico community user User4 are：
S132：By isomery cell equivalent interference channel of the Macro cell base stations to Pico cell base stations, obtain
Macro cell base stations side precoding linear space.
Macro cell base stations side precoding linear space is to choose Macro cell base stations side precoding vector
Linear space, is prelisted by taking Macro cell base stations side in the precoding linear space of Macro cell base stations side
Code vector, just can eliminate the isomery presence of intercell interference that Macro cell base stations are produced to Pico community users.
As above example, to be eliminated the isomery minizone that Macro base stations are produced to Pico community users User1, User4
Interference, BS2 correspond respectively to the precoding vector of User2 and User3 and need to meet following Macro cell base stations
Side precoding linear space：
v2∈Null([Hinf_1 Hinf_4]) (a13)；v3∈Null([Hinf_1 Hinf_4]) (a14)；
By choosing the pre-coding matrix for meeting (a13), (a14), you can eliminate Macro cell base stations little to Pico
The isomery presence of intercell interference that area user produces.
S14：Process obtains Macro community user receiving terminal lateral beam figuration vector sum in Macro cell base stations side
Macro cell base stations side precoding vector in the linear space of precoding vector.
Specifically, S14 includes S141 to S142：
S141：In making receiving end signal model, Macro community users receive multi-user interference component in the cell of side
It is zero, while Macro cell receiving terminal lateral beams figuration vector is arranged by maximum-ratio combing mode, to obtain
Macro cell base stations side precoding vector in the linear space of Macro cell base stations side precoding vector.
Wherein, Macro cells receiving terminal lateral beam figuration vector is arranged by maximum-ratio combing mode, in terminal
Receiving side maximizes the efficient channel gain of useful signal, can reduce the impact of receiving terminal noise signal.
Macro cell base stations side precoding vector is online in the linear space of Macro cell base stations side precoding vector
Property space in, the dry of the isomery minizone that Macro cell base stations are produced to Pico community users can be effectively eliminated
Disturb.By making Macro community users in receiving end signal model receive multi-user interference component in the cell of side it is
Zero, can eliminate to multi-user interference in Macro community user cells.
S142：Connect Macro cells in receiving end signal model according to Macro cell base stations side precoding vector
Receiving end lateral beam figuration vector is arranged by maximum-ratio combing mode, obtains Macro community user receiving terminal side waves
Beam figuration vector.
Specifically, the Macro cell base stations side precoding vector by obtaining in S142 receives formula (a1)
In end signal model, Macro cells receiving terminal lateral beam figuration vector is arranged by maximum-ratio combing mode, is obtained
Macro community user receiving terminal lateral beams figuration vector.Wherein, Macro cells receiving terminal lateral beam figuration to
Amount is arranged by maximum-ratio combing mode, can be eliminated to multi-user interference in Macro community user cells.
As above example, Macro community users are received using maximum-ratio combing (MRC, Maximum Ratio
Combining receiving terminal wave beam inborn nature) is carried out, and the efficient channel for useful signal being maximized in terminal receiving side increases
Benefit.That is User2 and User3 receives wave beam inborn nature vector using following maximum-ratio combings and carries out reception processing：
w2=H2,2v2(a15)；w3=H3,2v3 (a16)。
Due to the MPS process enhancement techniques (Range Expansion, RE) of Pico cells, Macro cell terminals
The interference for receiving signal can only consider the multi-user interference in Macro cells.Multi-user in Macro cells
Interference need to carry out pre- deletion by the transmission beam forming precoding vector of Macro base stations.Consider to need simultaneously completely
Foot (a13), the requirement of (a14), in linear space Null ([Hinf_1 Hinf_4]) optional two orthogonal base vectors β1
And β2, the transmission beam forming precoding vector parameterisable of Macro base stations is expressed as：
Obtain Macro little
Area user receiving terminal lateral beam figuration vector.
To eliminate the inter-user interference to User2, User3 in Macro cells, need to meet：
Bring (a15)-(a18) into (a19), (a20), have：
(a21) is done into the process similar to (a7)-(a10), is had
Wherein
So BS2 obtains the precoding vector of base station side by formula (a17), (a18), while passing through formula (a15)
(a16) Macro community user receiving terminal lateral beams figuration vector is obtained, Pico cells is used ensureing to eliminate in advance
While the isomery presence of intercell interference that family User1, User4 are produced, also eliminate in advance in Macro cells
The inter-user interference of User2, User3.
S15：By Pico community user receiving terminal lateral beams figuration vector, Pico cell base stations side precoding vector,
Macro community user receiving terminal lateral beam figuration vector sum Macro cell base stations side precoding vector is configured at pre-
If receiving end signal model in, obtain receiving end signal estimated value.
In the present embodiment, the Pico community user receiving terminals lateral beam got in above-mentioned steps S11-S14 is assigned
Shape vector, Pico cell base stations side precoding vector, Macro community user receiving terminal lateral beam figuration vector sum
Macro cell base stations side precoding vector is configured in the formula in S11 (a1), is obtained receiving end signal and is estimated
Evaluation, the receiving end signal estimated value for finally givingBy what is finally givenReceiving end signal estimated value can
Find out, by the method for the present embodiment, due to receiving side interference by the pre- elimination of base station side interference, user
Eliminate afterwards integrated processes eliminate it is multi-level disturb, to Pico community users, to eliminate isomery presence of intercell interference and same
Structure presence of intercell interference, to Macro community users, to eliminate multi-user interference in cell, realizes reduction noise
Disturbed during heterogeneous network multi-cell system is eliminated while the impact of signal at many levels.
Fig. 5 to Fig. 7 illustrates a kind of signal processing system of the heterogeneous network multi-cell system provided according to the present invention
The structured flowchart of system embodiment.A kind of signal processing system master of the heterogeneous network multi-cell system of the present embodiment
To be performed by heterogeneous network multi-cell system.The heterogeneous network multi-cell system of the present embodiment is LTE isomeries
Network multi-cell system, wherein, including at least one Macro cells and at least two Pico cells, Macro
Cell includes a Macro cell base station and at least two Macro community users, and Pico cells include one
Individual Pico cell base stations and Pico community users.Macro cell base stations are the Macro base stations in Macro cells,
Pico cell base stations are the Pico base stations in Pico cells, and Macro community users are the reception end in Macro cells
End, Pico community users are the receiving terminal in Pico cells.To Pico community users, wrap in the reception signal
Include two kinds of interference：Isomery presence of intercell interference and isomorphism presence of intercell interference.To Macro community users, signal is received
Also disturb including two kinds：Multi-user interference in isomery presence of intercell interference and cell.The system includes that receiving terminal is believed
Number model setting unit 21, Pico cells vector acquiring unit 22, linear space acquiring unit 23, Macro are little
Area's vector acquiring unit 24 and receiving end signal estimation unit 25.
Receiving end signal model setting unit 21, for arranging the receiving end signal of heterogeneous network multi-cell system
Model.
Specifically, the receiving end signal model isWhereinFor receiving terminal
The receiving end signal estimated value of Signal estimation value, i.e. user k,K, q are Customs Assigned Number, p (q)
For base station number, Hk,p(q)For channel matrix, sqFor the data symbol of user q, nkFor white noise vector, wkFor
User's k receiving terminal lateral beams figuration vector, vqThe precoding vector of user q is corresponded to for base station side.User k
Can be Macro community users and Pico community users, user q can be that Macro community users and Pico are little
Area user.General Pico cells are the Pico cells using MPS process enhancement techniques, are strengthened by MPS process
(Range Expansion, RE) technology, ignores interference of the Pico cells to Macro community users,
Therefore, corresponding simplified approximate systematic model can be set up, simplifies processing procedure.
For example, such as Fig. 8, LTE heterogeneous networks multi-cell system is by two Pico cells, a Macro cell
Isomery multi-cell system is constituted, two Pico cells are superimposed upon in a Macro cell, BS1, BS3 are Pico
Base station, BS2 are Macro base stations, have a Pico community user, have in Macro cells in each Pico cell
Two Macro community users.User1 be BS1 community users, User4 be BS3 community users, User2,
User3 is BS2 community users.The receiving end signal model isWhereinFor the receiving end signal estimated value of receiving end signal estimated value, i.e. user k,K, q are use
Family is numbered, and p (q) is base station number, Hk,p(q)For channel matrix, sqFor the data symbol of user q, nkFor white noise
Sound vector, wkFor user's k receiving terminal lateral beams figuration vector, vqFor base station side prelisting corresponding to user q
Code vector.User k can be Macro community users and Pico community users, and user q can be little for Macro
Area user and Pico community users.Then 1≤k≤4 in formula (b2), subscript p (1)=1, p (2)=2, p (3)=2,
P (4)=3.w1、w4For Pico community user receiving terminal lateral beams figuration vector, w2、w3For Macro cells
User's receiving terminal lateral beam figuration vector, v1、v4For Pico cell base stations side precoding vector, v2、v3Macro
Cell base station side precoding vector, each user belonging to each base station to its cell send single current data.
Pico cells strengthen (Range Expansion, RE) technology by MPS process, make Pico cells pair
The interference of Macro community users can be ignored, and obtain the approximated channel structure of Fig. 8, i.e.,：BS1 to User2,
The isomery area interference channel H of User32,1、H3,1, and BS3 done to the isomery cell of User2, User3
Disturb channel H2,3、H3,3Can process according to null matrix, so, it is believed that Macro community users in actual treatment
Receive signal and only exist multi-user interference in cell.
Pico cells vector acquiring unit 22, for making Pico community users in default receiving end signal model
It is zero to receive side isomorphism presence of intercell interference component, while Pico cell base stations side precoding vector is sent out with high specific
Send mode to arrange, obtain Pico community user receiving terminal lateral beam figuration vector sum Pico cell base stations side precoding
Vector.
Wherein, Pico cell base stations side precoding vector is arranged with high specific sending method, in base station sending side most
The efficient channel gain of bigization useful signal, can reduce the impact of receiving terminal noise signal.Make default connecing
It is zero that in receiver signal model, Pico community users receive side isomorphism presence of intercell interference component, can eliminate Pico
Isomorphism presence of intercell interference.
For example, Pico base stations transmitting terminal adopts high specific sending method (MRT, Maximum Ratio
Transmission precoding) is carried out, and the efficient channel gain of useful signal is maximized in base station sending side, with
Reduce the impact of receiving terminal noise signal.I.e.：
To Pico isomorphism presence of intercell interference, receiving side is processed in the following way.
Pico community users receive signal includes that two parts are disturbed：From the isomery presence of intercell interference of Macro base stations
With Pico isomorphism presence of intercell interference.To eliminate Pico isomorphism presence of intercell interference, in receiving end signal model, Pico is little
It is zero that area user receives side isomorphism presence of intercell interference component, that is, need to meet:
To User4:
To User1:
Bring (b3), (b4) into (b5), (b6), then have
To User4,
To User1,
Released by (b8), (b9):
(b10) be generalized eigenvalue problem, wherein λ is characterized value, then the receiving terminal wave beam inborn nature of User1
Vector is：
Wherein eig () represent take feature to
Amount.
The receiving terminal wave beam inborn nature vector of User4 is：
Wherein Null () is represented and is taken core operation.
Processed by the reception wave beam inborn nature of (b11), (b12), User1 and User2 can will be Pico isomorphisms little
Interval interference is eliminated.And in passing through to bring (b11), (b12) into (b5), (b6) respectively, obtain Pico
Cell base station side precoding vector.
Linear space acquiring unit 23, for according to Pico community user receiving terminal lateral beams figuration vector, obtaining
To the linear space of Macro cell base stations side precoding vector.
Specifically, linear space acquiring unit 23 includes equivalent interference channel acquisition module 231 and linear space
Acquisition module 232.
Equivalent interference channel acquisition module 231, for according to Pico community users receiving terminal lateral beam figuration to
Amount, obtains isomery cell equivalent interference channel of the Macro cell base stations to Pico cell base stations.
As above example, the equivalent interference channel of isomery cell of Pico community user User1 is：
Macro base stations to the equivalent interference channel of isomery cell of Pico community user User4 are：
Linear space acquisition module 232, for little to the isomery of Pico cell base stations by Macro cell base stations
The equivalent interference channel in area, obtains Macro cell base stations side precoding linear space.
Macro cell base stations side precoding linear space is to choose Macro cell base stations side precoding vector
Linear space, is prelisted by taking Macro cell base stations side in the precoding linear space of Macro cell base stations side
Code vector, just can eliminate the isomery presence of intercell interference that Macro cell base stations are produced to Pico community users.
As above example, to be eliminated the isomery minizone that Macro base stations are produced to Pico community users User1, User4
Interference, BS2 correspond respectively to the precoding vector of User2 and User3 and need to meet following Macro cell base stations
Side precoding linear space：
v2∈Null([Hinf_1 Hinf_4]) (b13)；v3∈Null([Hinf_1 Hinf_4]) (b14)；
By choosing the pre-coding matrix for meeting (b13), (b14), you can eliminate Macro cell base stations little to Pico
The isomery presence of intercell interference that area user produces.
Macro cells vector acquiring unit 24, obtains the tax of Macro community user receiving terminals lateral beam for processing
Macro cell base station side of the shape vector sum in the linear space of Macro cell base stations side precoding vector prelists
Code vector.
Specifically, Macro cells vector acquiring unit 24 includes precoding vector acquisition module 241 and wave beam
Figuration vector acquisition module 242.
Precoding vector acquisition module 241, for making Macro community users receiving terminal in receiving end signal model
In the cell of side, multi-user interference component is zero, while Macro cell receiving terminal lateral beams figuration vector is by maximum
Arrange than merging mode, to obtain the Macro in the linear space of Macro cell base stations side precoding vector
Cell base station side precoding vector.
Wherein, Macro cells receiving terminal lateral beam figuration vector is arranged by maximum-ratio combing mode, in terminal
Receiving side maximizes the efficient channel gain of useful signal, can reduce the impact of receiving terminal noise signal.
Macro cell base stations side precoding vector is online in the linear space of Macro cell base stations side precoding vector
Property space in, the dry of the isomery minizone that Macro cell base stations are produced to Pico community users can be effectively eliminated
Disturb.By making Macro community users in receiving end signal model receive multi-user interference component in the cell of side it is
Zero, can eliminate to multi-user interference in Macro community user cells.
Wave beam forming vector acquisition module 242, for making reception according to Macro cell base stations side precoding vector
In end signal model, Macro cells receiving terminal lateral beam figuration vector is arranged by maximum-ratio combing mode, is obtained
Macro community user receiving terminal lateral beams figuration vector.
Specifically, according to the Macro cell base stations side precoding obtained in precoding vector acquisition module 241 to
In measuring the receiving end signal model for make formula (b1), Macro cell receiving terminal lateral beams figuration vector is by high specific
Merging mode is arranged, and obtains Macro community user receiving terminal lateral beams figuration vector.Wherein, it is little by Macro
Area's receiving terminal lateral beam figuration vector is arranged by maximum-ratio combing mode, can be eliminated to Macro community users
Multi-user interference in cell.
As above example, Macro community users are received using maximum-ratio combing (MRC, Maximum Ratio
Combining receiving terminal wave beam inborn nature) is carried out, and the efficient channel for useful signal being maximized in terminal receiving side increases
Benefit.That is User2 and User3 receives wave beam inborn nature vector using following maximum-ratio combings and carries out reception processing：
w2=H2,2v2(b15)；w3=H3,2v3 (b16)。
Due to the MPS process enhancement techniques (Range Expansion, RE) of Pico cells, Macro cell ends
The interference of the termination collection of letters number can only consider the multi-user interference in Macro cells.It is multiplex in Macro cells
Family interference need to carry out pre- deletion by the transmission beam forming precoding vector of Macro base stations.Consider to need simultaneously
Meet (b13), the requirement of (b14), in linear space Null ([Hinf_1 Hinf_4]) optional two orthogonal basal orientations
Amount β1And β2, the transmission beam forming precoding vector parameterisable of Macro base stations is expressed as：
Obtain Macro cells
User's receiving terminal lateral beam figuration vector.
To eliminate the inter-user interference to User2, User3 in Macro cells, need to meet：
Bring (b15)-(b18) into (b19), (b20), have：
(b21) is done into the process similar to (b7)-(b10), is had
Wherein
So BS2 obtains the precoding vector of base station side by formula (b17), (b18), while passing through formula (b15)
(b16) Macro community user receiving terminal lateral beams figuration vector is obtained, is ensureing to eliminate to Pico cells in advance
While the isomery presence of intercell interference that user User1, User4 are produced, also eliminate in advance in Macro cells
The inter-user interference of User2, User3.
Receiving end signal estimation unit 25, for by Pico community user receiving terminal lateral beams figuration vector, Pico
Cell base station side precoding vector, Macro community user receiving terminal lateral beam figuration vector sum Macro cell bases
Side precoding vector of standing is configured in default receiving end signal model, obtains receiving end signal estimated value.
In the present embodiment, by above-mentioned receiving end signal model setting unit 21, Pico cells vector acquiring unit
22nd, in linear space acquiring unit 23 and Macro cells vector acquiring unit 24, the Pico cells that get are used
Family receiving terminal lateral beam figuration vector, Pico cell base stations side precoding vector, Macro community user receiving terminals
Lateral beam figuration vector sum Macro cell base station side precoding vector is configured at receiving end signal model and arranges single
In formula (b1) in unit 21, the receiving end signal estimated value for finally givingBy what is finally givenConnect
Receiver signal estimated value can be seen that, by the system of the present embodiment, due to being eliminated by base station side interference in advance,
User eliminates integrated processes elimination and disturbs at many levels after receiving side interference, to Pico community users, different to eliminate
Structure presence of intercell interference and isomorphism presence of intercell interference, to Macro community users, to eliminate multi-user interference in cell,
Realizing and disturbed in eliminate while reducing the impact of noise signal heterogeneous network multi-cell system at many levels.
In sum, a kind of signal processing method and system of heterogeneous network multi-cell system of the invention, leads to
Cross the shadow that useful channel gain reduction user's receiving terminal noise signal is maximized by MRT/MRC receiving/transmission methods
Ring, integrated processes are eliminated after the pre- elimination of base station side interference, user receive side interference and eliminate dry at many levels
Disturb, realizing and disturbed in eliminate while reducing the impact of noise signal heterogeneous network multi-cell system at many levels.
The principle and its effect of above-described embodiment only illustrative present invention, it is of the invention not for limiting.
Any person skilled in the art all can enter to above-described embodiment under the spirit and the scope without prejudice to the present invention
Row modifications and changes.Therefore, such as those of ordinary skill in the art without departing from institute of the present invention
All equivalent modifications completed under the spirit and technological thought of announcement or change, should be by the right of the present invention
Requirement is covered.
Claims (10)
1. a kind of signal processing method of heterogeneous network multi-cell system, it is characterised in that comprise the following steps:
In making default receiving end signal model, Pico community users reception side isomorphism presence of intercell interference component is
Zero, while Pico cell base stations side precoding vector is arranged with high specific sending method, obtain Pico community users
Receiving terminal lateral beam figuration vector sum Pico cell base station side precoding vector；
According to Pico community users receiving terminal lateral beam figuration vector, obtain Macro cell base stations side and prelist
The linear space of code vector；
Process obtains the Macro community users receiving terminal lateral beam figuration vector sum in Macro cell base stations side
Macro cell base stations side precoding vector in the linear space of precoding vector；
By Pico community user receiving terminal lateral beams figuration vector, Pico cell base stations side precoding vector,
Precoding vector configuration in Macro cell base stations side described in Macro community user receiving terminal lateral beam figuration vector sum
In default receiving end signal model, receiving end signal estimated value is obtained.
2. the method for claim 1, it is characterised in that described to be connect according to the Pico community users
Receiving end lateral beam figuration vector, obtains the linear space of Macro cell base stations side precoding vector, including：
According to Pico community user receiving terminal lateral beams figuration vector, Macro cell base stations are obtained to Pico cells
The equivalent interference channel of isomery cell of base station；
By isomery cell equivalent interference channel of the Macro cell base stations to Pico cell base stations, Macro is obtained
Cell base station side precoding linear space.
3. the method for claim 1, it is characterised in that process obtains the Macro community users
Macro of the receiving terminal lateral beam figuration vector sum in the linear space of Macro cell base stations side precoding vector
Cell base station side precoding vector, including：
In making the receiving end signal model, Macro community users receive multi-user interference component in the cell of side
It is zero, while Macro cell receiving terminal lateral beams figuration vector is arranged by maximum-ratio combing mode, to obtain
Macro cell base stations side precoding vector in the linear space of Macro cell base stations side precoding vector；
Receive Macro cells in the receiving end signal model according to Macro cell base stations side precoding vector
Side wave beam forming vector is arranged by maximum-ratio combing mode, obtains Macro community user receiving terminal lateral beams
Figuration vector.
4. the method for claim 1, it is characterised in that the Pico cells are to adopt MPS process
The Pico cells of enhancement techniques.
5. the method for claim 1, it is characterised in that described to make default receiving end signal model
Before middle Pico community users reception side isomorphism presence of intercell interference component is zero, also include：Heterogeneous network is set
The receiving end signal model of network multi-cell system:WhereinFor receiving end signal
Estimated value,K, q are Customs Assigned Number, and p (q) is base station number, Hk,p(q)For channel matrix, sq
For the data symbol of user q, nkFor white noise vector, wkFor user's k receiving terminal lateral beams figuration vector, vq
It is vectorial corresponding to the wave beam inborn nature of user q for base station side.
6. a kind of signal processing system of heterogeneous network multi-cell system, it is characterised in that include：
Pico cells vector acquiring unit, for receiving Pico community users in default receiving end signal model
Side isomorphism presence of intercell interference component is zero, while Pico cell base stations side precoding vector is sent with high specific
Mode is arranged, obtain Pico community users receiving terminal lateral beam figuration vector sum Pico cell base station side precoding to
Amount；
Linear space acquiring unit, for according to the Pico community users receiving terminal lateral beam figuration vector,
Obtain the linear space of Macro cell base stations side precoding vector；
Macro cells vector acquiring unit, obtains the Macro community users receiving terminal lateral beam for processing
Macro cell base station side of the figuration vector sum in the linear space of Macro cell base stations side precoding vector is pre-
Coding vector；
Receiving end signal estimation unit, for will Pico community user receiving terminal lateral beams figuration vector, Pico it is little
Area's base station side precoding vector, Macro cells described in Macro community user receiving terminal lateral beam figuration vector sum
Base station side precoding vector is configured at default receiving end signal model, obtains receiving end signal estimated value.
7. system as claimed in claim 6, it is characterised in that the linear space acquiring unit includes
Effect interference channel acquisition module and linear space acquisition module, wherein：
Equivalent interference channel acquisition module, for according to Pico community user receiving terminal lateral beams figuration vector,
Obtain isomery cell equivalent interference channel of the Macro cell base stations to Pico cell base stations；
Linear space acquisition module, for by Macro cell base stations to isomery cell of Pico cell base stations etc.
Effect interference channel, obtains the linear space of Macro cell base stations side precoding.
8. system as claimed in claim 6, it is characterised in that Macro cells vector acquiring unit includes
Precoding vector acquisition module and wave beam forming vector acquisition module, wherein：
The precoding vector acquisition module, for connecing Macro community users in the receiving end signal model
In the cell of receiving end side, multi-user interference component is zero, while Macro cell receiving terminal lateral beam figuration vectors pass through
Maximum-ratio combing mode is arranged, to obtain in the linear space of Macro cell base stations side precoding vector
Macro cell base stations side precoding vector；
The wave beam forming vector acquisition module, described in being made according to Macro cell base stations side precoding vector
In receiving end signal model, Macro cells receiving terminal lateral beam figuration vector is arranged by maximum-ratio combing mode,
Obtain Macro community user receiving terminal lateral beams figuration vector.
9. system as claimed in claim 6, it is characterised in that the Pico cells are to adopt MPS process
The Pico cells of enhancement techniques.
10. system as claimed in claim 6, it is characterised in that also arrange including receiving end signal model
Unit, for arranging the receiving end signal model of heterogeneous network multi-cell system:
WhereinFor receiving end signal estimated value,K, q are
Customs Assigned Number, p (q) are base station number, Hk,p(q)For channel matrix, sqFor the data symbol of user q, nkFor
White noise vector, wkFor user's k receiving terminal lateral beams figuration vector, vqIt is that base station side corresponds to user q's
Wave beam inborn nature vector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627380.6A CN106559810B (en) | 2015-09-28 | 2015-09-28 | Signal processing method and system for heterogeneous network multi-cell system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627380.6A CN106559810B (en) | 2015-09-28 | 2015-09-28 | Signal processing method and system for heterogeneous network multi-cell system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106559810A true CN106559810A (en) | 2017-04-05 |
| CN106559810B CN106559810B (en) | 2020-01-17 |
Family
ID=58416559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510627380.6A Active CN106559810B (en) | 2015-09-28 | 2015-09-28 | Signal processing method and system for heterogeneous network multi-cell system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106559810B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309639A (en) * | 2017-07-28 | 2019-02-05 | 中兴通讯股份有限公司 | Channel matrix processing method and processing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236878A (en) * | 2013-04-19 | 2013-08-07 | 西安交通大学 | Maximum ratio combining receiving vector estimation-based coordinated beamforming method |
| WO2014109538A1 (en) * | 2013-01-08 | 2014-07-17 | 삼성전자 주식회사 | Method for eliminating interference between cells in wireless communications system and apparatus therefor |
| CN104506226A (en) * | 2014-12-16 | 2015-04-08 | 西安交通大学 | Cooperative femtocell-based interference suppressing precoding method in double-layer heterogeneous network |
| CN104518822A (en) * | 2014-12-17 | 2015-04-15 | 华中科技大学 | Method for coordinating interference between multi-cell MU (multi-user)-MIMO (multiple-input multiple-output) systems |
| CN104601209A (en) * | 2015-01-26 | 2015-05-06 | 西安电子科技大学 | Cooperated multi-point transmission method suitable for 3D-MIMO (Multiple Input Multiple Output) system |
-
2015
- 2015-09-28 CN CN201510627380.6A patent/CN106559810B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014109538A1 (en) * | 2013-01-08 | 2014-07-17 | 삼성전자 주식회사 | Method for eliminating interference between cells in wireless communications system and apparatus therefor |
| CN103236878A (en) * | 2013-04-19 | 2013-08-07 | 西安交通大学 | Maximum ratio combining receiving vector estimation-based coordinated beamforming method |
| CN104506226A (en) * | 2014-12-16 | 2015-04-08 | 西安交通大学 | Cooperative femtocell-based interference suppressing precoding method in double-layer heterogeneous network |
| CN104518822A (en) * | 2014-12-17 | 2015-04-15 | 华中科技大学 | Method for coordinating interference between multi-cell MU (multi-user)-MIMO (multiple-input multiple-output) systems |
| CN104601209A (en) * | 2015-01-26 | 2015-05-06 | 西安电子科技大学 | Cooperated multi-point transmission method suitable for 3D-MIMO (Multiple Input Multiple Output) system |
Non-Patent Citations (2)
| Title |
|---|
| YUAN LI,JIAN LI,LI ZHANG，MUGEN PENG: "Adaptive Heterogeneous Coordinated Beamforming Algorithm in LTE-Advanced Systems", 《2013 IEEE WIRELESS COMMUNICATION AND NETWORKING CONFERENCE》 * |
| 李远，彭木根: "抑制宏基站干扰的下行干扰协调方案", 《北京邮电大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309639A (en) * | 2017-07-28 | 2019-02-05 | 中兴通讯股份有限公司 | Channel matrix processing method and processing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106559810B (en) | 2020-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Energy efficiency of large-scale multiple antenna systems with transmit antenna selection | |
| CN104052535B (en) | The extensive mimo system multiuser transmission method of millimeter wave based on space division multiple access Yu AF panel | |
| CN102857934B (en) | Method and device for selecting cooperation sets | |
| CN102055563B (en) | Adaptive joint linear precoding method applicable to multi-base station coordination | |
| CN107466069A (en) | Efficiency optimization method based on dual link and non-orthogonal multiple access in wireless network | |
| CN104168573B (en) | Interference elimination method based on sub-clustering interference alignment under Femtocell networks | |
| CN106230571B (en) | A kind of pilot distribution method based on user's sub-clustering | |
| CN109451492A (en) | Safe transmission method in downlink full duplex relaying network based on man made noise and beam forming | |
| CN109195214A (en) | A kind of NOMA power distribution method based on genetic algorithm | |
| CN106027128A (en) | Uplink multiuser interference suppression method based on non-orthogonal multiple access | |
| CN107026684A (en) | A kind of cognitive communications safety of physical layer efficiency optimization method based on man made noise | |
| CN110166274A (en) | A kind of NOMA collaborative network power optimization method for wirelessly taking energy | |
| CN107911857B (en) | Multi-access method based on uplink and downlink decoupling in ultra-dense heterogeneous network | |
| CN104796991B (en) | The resource allocation methods of OFDMA system based on gesture game | |
| Zhang et al. | Locally orthogonal training design for cloud-RANs based on graph coloring | |
| He et al. | Successive interference cancellation and fractional frequency reuse for LTE uplink communications | |
| CN103889005B (en) | A kind of cooperative multipoint transmission dispatching method and device | |
| CN109951828A (en) | It is a kind of social activity sensing network in D2D multicast video transmission method for channel allocation | |
| CN106559810A (en) | A kind of signal processing method and system of heterogeneous network multi-cell system | |
| CN104821840B (en) | A kind of anti-interference method of extensive multiple-input and multiple-output downlink system | |
| CN101621319A (en) | Multi-cell cooperative downlink transmission user pairing method based on large-scale channel information | |
| Ma et al. | A new algorithm of spectrum allocation for cognitive radio based on cooperative game | |
| CN103338457A (en) | Collaborative scheduling beam forming based user option method | |
| CN107425885A (en) | Dynamic clustering method is mixed under CoMP based on Game with Coalitions | |
| CN102891711B (en) | User selection method in multipoint coordination scene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |