CN107333271A - The method of sub-clustering, apparatus and system - Google Patents
The method of sub-clustering, apparatus and system Download PDFInfo
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- CN107333271A CN107333271A CN201610274509.4A CN201610274509A CN107333271A CN 107333271 A CN107333271 A CN 107333271A CN 201610274509 A CN201610274509 A CN 201610274509A CN 107333271 A CN107333271 A CN 107333271A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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- H04B7/022—Site diversity; Macro-diversity
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Abstract
The invention provides a kind of method of sub-clustering, apparatus and system, wherein, this method includes：The RSRP lists that centralized processing unit receiving terminal is reported by base station, wherein, RSRP lists are used for the RSRP for recording all base stations of terminal measurement covering terminal；Centralized processing unit determines the initial sub-clustering centered on terminal according to RSRP lists；The base station that centralized processing unit determines to use JT modes in final sub-clustering and be terminal service according to predetermined manner, and using CB modes and be the base station of terminal service.By the present invention, the problem of being disturbed in correlation technique in C RAN networks between the base station of dense deployment is solved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method of sub-clustering, apparatus and system.
Background technology
In recent years, with the explosive growth of intelligent terminal, network traffic steeply rises, and mobile service data flow is fast
Surge length, and the competitive pressure being growing more intense is brought to operator, increases network utilization and has been difficult to from design and the frequency of eating dishes without rice or wine
Realize and break through in terms of band resource, operator must carry out being related to the reform and upgrading of whole network system architecture.In traditional nothing
In line access (Radio Access Network, referred to as RAN), with gradually increasing for base station number, substantial amounts of base station
Construction and maintenance cost can also increase substantially therewith, and the limited information between base station exchanges and to be difficult to reality between base station
Existing resource-sharing, this make it that the actual utilization ratio of network hardware resources is very low.
Based on above-mentioned background, C-RAN should be needed and given birth to, and C-RAN is to handle (Centralized based on centralization
Processing), collaborative radio (Collaborative Radio) and real-time cloud computing framework (Real-time Cloud
Infrastructure green wireless access network framework (Clean System)).C-RAN frameworks are mainly comprising three parts：
Centralization virtualization base-band resource processing pond (Baseband Unit pool, referred to as BBU pool), by Remote Radio Unit
The distributed wireless collaborative network of (Radio Remote Unit, referred to as RRU) composition, and optical fiber transmission therebetween
Network, the transmission network is finite capacity in actual framework.Centralized virtual base-band resource processing pond is using virtualization skill
Art will be a base-band resource processing pond positioned at the physics Base Band Unit abstract of diverse geographic location, ensure that different base band
The efficient information of low time delay is exchanged between processing unit, while having very powerful disposal ability and computing function, this spy
Point causes CoMP transmission technology to have fairly good performance to realize under C-RAN frameworks.
CoMP transmission technology includes joint transmission (Joint Transmission, referred to as JT) and cooperation velocity of wave inborn nature
(Coordinated Beamforming, referred to as CB) two ways.For a certain user, JT modes are multiple base stations
Shared channel condition information (Channel State Information, referred to as CSI) between the user and multiple base stations,
Collaboration simultaneously carries out wave beam forming for the user and transmits user data；CB modes are that the user is shared and multiple in multiple base stations
CSI between base station, meanwhile, only one of which base station is that the user transmits user data, and the user direction is evaded in other base stations
Spatial beams.Traditional coordinated multipoint transmission (Coordinated Multiple Points Transmission/Reception,
Referred to as CoMP) mode is to use one of the two, and for C-RAN frameworks, transmission can be being caused only with JT modes
Network load is excessive, and can cause the wasting of resources only with CB modes.For the above mentioned problem in correlation technique, not yet deposit at present
In effective solution.
The content of the invention
The embodiments of the invention provide a kind of method of sub-clustering, apparatus and system, at least to solve correlation technique in C-RAN
The problem of being disturbed in network between the base station of dense deployment.
According to an aspect of the invention, there is provided a kind of method of sub-clustering, including：Centralized processing unit receiving terminal is led to
Cross Reference Signal Received Power (Reference Signal Receiving Power, the referred to as RSRP) row that base station is reported
Table, wherein, the RSRP lists are used for the RSRP for recording all base stations of the terminal measurement covering terminal；It is described to concentrate
Processing unit determines the initial sub-clustering centered on the terminal according to the RSRP lists；The centralized processing unit is according to pre-
If mode determines final sub-clustering, wherein, the base station in the final sub-clustering includes：Using joint transmission JT modes and for the end
The base station of service is held, and using cooperative beam inborn nature CB modes and is the base station of the terminal service.
Further, the centralized processing unit determines initial point centered on the terminal according to the RSRP lists
Cluster includes：The centralized processing unit judges whether there is the first RSRP for meeting preparatory condition in RSRP lists；In the RSRP
When there is a RSRP in list, the centralized processing unit determines first base station corresponding with the RSRP；The collection
The first base station is added in the initial sub-clustering by middle processing unit.
Further, the preparatory condition is：
RSRPmax-RSRPCoMP≤RSRPthreshold
Wherein, RSRPmaxFor the maximum in RSRP lists corresponding with the terminal, RSRPCoMPTo be arranged in the RSRP
Value corresponding with adding the base station of the initial sub-clustering, RSRP in tablethresholdTo preset fixed threshold.
Further, the centralized processing unit determines to use JT modes and be described in final sub-clustering according to predetermined manner
The base station of terminal service, and include using CB modes and for the base station of the terminal service：The centralized processing unit passes through
Dichotomy, under transport network capacity and the limited constraints of transimission power, to maximize terminal speed as optimization aim,
The base station for using JT modes and being the terminal service is determined in the initial sub-clustering, and is taken using CB modes and for the terminal
The base station of business；The centralized processing unit uses the method for exhaustion, and determines final sub-clustering to maximize terminal speed as optimization aim
JT modes in middle use transmission means and be the base station of the terminal service, and using the CB modes in transmission means and be institute
State the base station of terminal service.
Further, the base station for meeting following condition is the base station using JT modes：
0≤RSRPmax-RSRPJT≤RSRPthreshold-δ
The base station for meeting following condition is the base station using CB modes：
RSRPthreshold-δ≤RSRPmax-RSRPCB≤RSRPthreshold
Wherein, wherein, RSRPmaxFor the maximum in RSRP lists corresponding with the terminal, RSRPJTTo meet formula
Condition uses the corresponding value in the RSRP lists in base station of JT modes, RSRPCBCB modes are used to meet formula condition
The corresponding value in the RSRP lists in base station, RSRPthresholdTo preset fixed threshold；0≤δ≤RSRPthresholdFor
Variable, wherein, the change of the variable can cause terminal and the change for the corresponding relation between the base station of the terminal service
To change the speed of terminal.
Further, the optimization aim of maximization terminal speed is determined in the following manner：
Wherein, K is total number of terminals, βjFor the dispatching priority weights of terminal j；
The constraints is determined in the following manner：
Wherein, dijAnd wijIt is the i-th row jth column element in JT matrixes and pre-coding matrix respectively；RjFor j-th terminal
Terminal speed；PiAnd CiRespectively base station BiMaximum transmission power and the base station and centralized processing unit between transmission capacity.
Further, methods described also includes：The centralized processing unit is used according to base station in the final sub-clustering of determination
Transmission means and the terminal data that is carried distribute bandwidth for the base station, wherein, the transmission means includes JT modes
With CB modes.
Further, methods described also includes：The centralized processing unit receives the base station according to the training received
The precoding that sequence is determined, wherein, the precoding is used to indicate using JT modes and is that the base station of the terminal service is institute
State terminal transmission directive property and carry the space velocity of wave of data, and using CB modes and be that the base station of the terminal service is institute
State terminal and evade the upward spatial beams of the terminal side.
According to another aspect of the present invention there is provided a kind of method of sub-clustering, including：Base station receiving terminal is reported
RSRP lists, wherein, the RSRP lists are used for the RSRP for recording all base stations of the terminal measurement covering terminal；Institute
State base station and send the RSRP lists to centralized processing unit.
Further, methods described also includes：The base station receives the training sequence that the terminal is reported；The base station root
Channel condition information is determined according to the training sequence, and precoding is obtained according to channel condition information determination.
According to another aspect of the present invention there is provided a kind of device of sub-clustering, applied to centralized processing unit side, bag
Include：First receiving module, the RSRP lists reported for receiving terminal by base station, wherein, the RSRP lists are used to record
The RSRP of all base stations of the terminal measurement covering terminal；First determining module, for true according to the RSRP lists
The fixed initial sub-clustering centered on the terminal；Second determining module, for being determined to use in final sub-clustering according to predetermined manner
JT modes and for the terminal service base station, and using CB modes and for the terminal service base station.
According to a further aspect of the invention there is provided a kind of device of sub-clustering, applied to base station side, including：Second connects
Receipts module, the RSRP lists reported for receiving terminal, wherein, the RSRP lists are used to record the terminal measurement covering institute
State the RSRP of all base stations of terminal；Sending module, for sending the RSRP lists to centralized processing unit.
According to a further aspect of the invention there is provided a kind of system of sub-clustering, including：It is above-mentioned to be applied to focus on list
The device of first side and the above-mentioned device applied to base station side.
By the present invention, the RSRP lists that centralized processing unit receiving terminal is reported by base station, and according to RSRP lists
It is determined that the initial sub-clustering centered on terminal, and then determine to use JT modes in final sub-clustering according to predetermined manner and taken for terminal
The base station of business, and using CB modes and be the base station of terminal service, i.e., base station is divided into using JT modes and uses CB modes
Base station so that base station can simultaneously in the case where network system resources such as transport network capacity and transimission power are limited maximum
Change utilizes frequency band, so as to solve the problem of being disturbed in correlation technique in C-RAN networks between the base station of dense deployment.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the method flow diagram one of sub-clustering according to embodiments of the present invention；
Fig. 2 is the method flow diagram two of sub-clustering according to embodiments of the present invention；
Fig. 3 is the structured flowchart one of the device of sub-clustering according to embodiments of the present invention；
Fig. 4 is the structured flowchart two of the device of sub-clustering according to embodiments of the present invention；
Fig. 5 is the structured flowchart of the system of sub-clustering according to embodiments of the present invention；
Fig. 6 is the schematic diagram of system model according to embodiments of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.
Embodiment 1
The invention provides a kind of method of sub-clustering, Fig. 1 is the method flow diagram one of sub-clustering according to embodiments of the present invention,
As shown in figure 1, the step of this method includes：
Step S102：The RSRP lists that centralized processing unit receiving terminal is reported by base station, wherein, RSRP lists are used for
Record the RSRP of all base stations of terminal measurement covering terminal；
Step S104：Centralized processing unit determines the initial sub-clustering centered on terminal according to RSRP lists；
Step S106：Centralized processing unit determines final sub-clustering according to predetermined manner, wherein, the base station bag in final sub-clustering
Include：Using joint transmission JT modes and be the base station of the terminal service, and use cooperative beam inborn nature CB modes and be institute
State the base station of terminal service.
By the above-mentioned steps S102 to step S106 of the present embodiment, centralized processing unit receiving terminal is reported by base station
RSRP lists, and initial sub-clustering centered on terminal is determined according to RSRP lists, and then determine according to predetermined manner final
In sub-clustering using JT modes and for terminal service base station, and using CB modes and for terminal service base station, i.e., by base station
It is divided into using JT modes and using the base station of CB modes so that base station can be simultaneously in network system resources such as transport network capacity
With transimission power it is limited in the case of maximally utilize frequency band, so as to solve in correlation technique the intensive portion in C-RAN networks
The problem of being disturbed between the base station of administration.
It should be noted that the centralized processing unit being related in the present embodiment focuses on pond for base band in C-RAN, belong to
In Centralized Controller part.
In the optional embodiment of the present embodiment, for the centralized processing unit being related in the present embodiment step S104
In the way of determining the initial sub-clustering centered on terminal according to RSRP lists, it can lead in the optional embodiment of the present embodiment
Following manner is crossed to realize：
Step S104-1：Middle processing unit judges whether there is the first RSRP for meeting preparatory condition in RSRP lists；
Wherein, the preparatory condition is chosen as in the present embodiment：
RSRPmax-RSRPCoMP≤RSRPthreshold
Wherein, RSRPmaxFor the maximum in RSRP lists corresponding with terminal, RSRPCoMPFor in RSRP lists with plus
Enter the corresponding value in base station of initial sub-clustering, RSRPthresholdTo preset fixed threshold.
Step S104-2：When there is a RSRP in SRP lists, centralized processing unit determines the first base corresponding with RSRP
Stand；
Step S104-3：First base station is added in initial sub-clustering by processing unit.
Based on this, in another optional embodiment of the present embodiment, the collection being related in the present embodiment step S106
The base station that middle processing unit determines to use JT modes in final sub-clustering and be terminal service according to predetermined manner, and use CB side
Formula and for terminal service base station mode, can realize in the following way：
Step S106-1：Centralized processing unit is by dichotomy, in transport network capacity and the limited constraint of transimission power
Under the conditions of, to maximize terminal speed as optimization aim, the base for using JT modes and being terminal service is determined in initial sub-clustering
Stand, and using CB modes and be the base station of terminal service；
Step S106-2：Centralized processing unit uses the method for exhaustion, and is determined most as optimization aim using maximizing terminal speed
JT modes in transmission means are used in whole sub-clustering and it is the base station of terminal service, and using the CB modes in transmission means and is
The base station of terminal service.
Wherein, for the base station and the base station of use CB modes of the use JT modes being related in the S106-1 and S106-2
It can determine in the following way：
(1) base station for meeting following condition is the base station using JT modes：
0≤RSRPmax-RSRPJT≤RSRPthreshold-δ
(2) base station for meeting following condition is the base station using CB modes：
RSRPthreshold-δ≤RSRPmax-RSRPCB≤RSRPthreshold
Wherein, wherein, RSRPmaxFor the maximum in RSRP lists corresponding with terminal, RSRPJTTo meet formula condition
Use the corresponding value in RSRP lists in the base station of JT modes, RSRPCBTo meet the base station pair that formula condition uses CB modes
The value in RSRP lists answered, RSRPthresholdTo preset fixed threshold；0≤δ≤RSRPthresholdFor variable, wherein, become
The change of amount can cause the change of the corresponding relation between terminal and the base station for being terminal service to change the speed of terminal.
In addition for the optimization aim being related in above-mentioned S106-1 and S106-2, in the optional embodiment of the present embodiment
In can determine in the following manner maximize terminal speed optimization aim：
Wherein, K is total number of terminals, βjFor the dispatching priority weights of terminal j；
Constraints is determined in the following manner：
Wherein, dijAnd wijIt is the i-th row jth column element in JT matrixes and pre-coding matrix respectively；RjFor j-th terminal
Terminal speed；PiAnd CiRespectively base station BiMaximum transmission power and the base station and centralized processing unit between transmission capacity.
The method of the present embodiment can also include：
Step S108：Transmission means and carried that centralized processing unit is used according to base station in the final sub-clustering of determination
Terminal data for base station distribute bandwidth, wherein, transmission means include JT modes and CB modes.
Step S110：Centralized processing unit receives the precoding that base station is determined according to the training sequence received, wherein, in advance
Encode for indicating using JT modes and being that the base station of terminal service is the space velocity of wave of terminal transmission directive property and carrying data,
And using CB modes and be that the base station of terminal service is that terminal evades the upward spatial beams of terminal side.
Embodiment 2
Fig. 2 is the method flow diagram two of sub-clustering according to embodiments of the present invention, as shown in Fig. 2 the step of this method includes：
Step S202：The RSRP lists that base station receiving terminal is reported, wherein, RSRP lists are used to record terminal measurement covering
The RSRP of all base stations of terminal；
Step S204：Base station sends RSRP lists to centralized processing unit.
In addition, the method and step of the present embodiment can also include：
Step S206：The training sequence that base station receiving terminal is reported；
Step S208：Base station determines channel condition information according to training sequence, and is obtained according to channel condition information determination
Precoding.
Embodiment 3
A kind of device of sub-clustering is additionally provided in the present embodiment, and the device is used to realize above-described embodiment and be preferable to carry out
Mode, had carried out repeating no more for explanation.As used below, term " module " can realize the software of predetermined function
And/or the combination of hardware.Although the device described by following examples is preferably realized with software, hardware, or soft
The realization of the combination of part and hardware is also that may and be contemplated.
Fig. 3 is the structured flowchart one of the device of sub-clustering according to embodiments of the present invention, and the device is applied to focus on list
First side, as shown in figure 3, the device includes：First receiving module 32, the RSRP lists reported for receiving terminal by base station,
Wherein, RSRP lists are used for the RSRP for recording all base stations of terminal measurement covering terminal；First determining module 34, connects with first
Module 32 is received, for determining the initial sub-clustering centered on terminal according to RSRP lists；Second determining module 36, is determined with first
Module 34 is of coupled connections, for determining final sub-clustering according to predetermined manner, wherein, the base station in final sub-clustering includes：Use connection
The base station transmitted JT modes and be the terminal service is closed, and using cooperative beam inborn nature CB modes and is the terminal service
Base station.
It should be noted that above-mentioned modules can be by software or hardware to realize, for the latter, Ke Yitong
Cross in the following manner realization, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or, above-mentioned modules are with any
The form of combination is located in different processors respectively.
Embodiment 4
Fig. 4 is the structured flowchart two of the device of sub-clustering according to embodiments of the present invention, and the device is applied to base station side, such as schemed
Described in 4, the device includes：Second receiving module 42, the RSRP lists reported for receiving terminal, wherein, RSRP lists are used for
Record the RSRP of all base stations of terminal measurement covering terminal；Sending module 44, is of coupled connections with the second receiving module 42, is used for
RSRP lists are sent to centralized processing unit.
Embodiment 5
Fig. 5 is the structured flowchart of the system of sub-clustering according to embodiments of the present invention, as shown in figure 5, the system includes：Implement
Applied to the device that base station side is applied in the device and embodiment 5 of centralized processing unit side in example 3.
Embodiment 6
The present embodiment 6 is the specific embodiment to embodiment 5 based on above-described embodiment 1, present embodiments provides a kind of C-
The transmission mechanism based on mixing CoMP under RAN frameworks, can at least be solved in C-RAN networks between the base station of dense deployment
Interference problem and the problem of user rate is maximized in the case that transport network capacity and transimission power are limited.
Algorithm modeling first to the present embodiment is illustrated：
Collection of base stations is described asUser's set description isAppoint
There is N meaning base stationtIndividual transmission antenna, any user has 1 reception antenna.For user UjFor, with the base station of the user-center
Cooperation transmission cluster includes the JT nodes transmitted using JT patterns as the user and the CB nodes transmitted in CB modes as the user, usesIt is expressed as user UjThe JT node sets of service, are usedIt is expressed as user UjThe CB node sets of service, are usedRepresent
For user UjAll node sets of defeated service.Introduce overall situation matrix D=[dij]N×KWith C=[cij]N×KDescribe all base stations and
Relation between user, wherein,
User UjReceiving signal can be expressed as：
Wherein, αijRepresent from base station BiTo user UjLarge scale decline,Represent base station BiWith user UjBetween
Small yardstick channel fading vector,Represent beamforming vector, pijIt is base station BiFor user UjThe transmission work(of distribution
Rate, sjRepresent user UjSignal, njRepresent user UjNoise during signal is received, variance is
Section 1 is to be disturbed in cluster in the useful signal that wherein Section 1 receives for user, bracket, according to ZF precodings
It can eliminate, Section 2 is to be disturbed outside cluster in bracket, can obtain user's signal to noise ratio by user's reception signal is：
It is possible to further obtain, user UjUser rate on unit bandwidth is：
Rj=log2(1+SINRj)
Based on mixing CoMP transmission mode under a kind of C-RAN frameworks proposed based on above-mentioned modeling algorithm, the present embodiment
The optimization cluster-dividing method of customer-centric, including：
Step S11, base station sends the RSRP of multiple base stations around reference signal, user's measurement, and generation one is on the use
The RSRP lists at family report nearest base station；
The corresponding RSRP list informations of each user are reported and focus on list by step S12, base station by transmission network
Member；
Step S13, centralized processing unit determines the initial of customer-centric according to the corresponding RSRP lists of each user
Sub-clustering, if the RSRP for a certain base station of correspondence that user receives meets following formula, the base station is added with the first of the user-center
Beginning sub-clustering：
RSRPmax-RSRPCoMP≤RSRPthreshold
Wherein, RSRPmaxFor maximum, RSRP in the corresponding RSRP lists of the userCoMPFor user correspondence can be added
Initial sub-clustering the corresponding value in RSRP lists in base station, RSRPthresholdTo preset fixed threshold.
Step S14, because C-RAN uses TDD system, down channel estimation can be obtained by uplink channel estimation
Arrive.In the step, base station of the user into corresponding initial base station cluster calculates in terms of sending training sequence, base station and obtains channel shape
State information, and precoding is obtained according to channel condition information calculating, while precoding is sent into centralized processing unit.
Step S15, centralized processing unit is by dichotomy, in transport network capacity and the limited constraints of transimission power
Under, to maximize user rate as optimization aim, primarily determined that in initial sub-clustering using the base station that JT modes are user service
With the base station that use CB modes are user service.
Step S16, centralized processing unit further use a small range the method for exhaustion, equally using maximize user rate as
Optimization aim, the final use JT modes that determine in sub-clustering are the base station of user service and using the base that CB modes are user service
Stand.
Step S17, base-band resource centralized management unit transmission means and the user carried according to used in base station
Data are that bandwidth is distributed in base station.
Step S18, uses the sky for the carrying user data that the base station that JT modes are user service is user's transmission directive property
Between wave beam, the use of the base station that CB modes are user service is that user evades the upward spatial beams of the user side.
It should be noted that in the step 5, this patent proposes a kind of base station to using JT modes and uses CB side
The base-station node of formula carries out the framework of layering deployment, i.e., on the basis of initialization sub-clustering, the serving BS for meeting following formula is set
It is set to the serving BS of JT modes：
0≤RSRPmax-RSRPJT≤RSRPthreshold-δ
The serving BS for meeting following formula is set as to the serving BS of CB modes：
RSRPthreshold-δ≤RSRPmax-RSRPCB≤RSRPthreshold
Wherein, 0≤δ≤RSRPthresholdFor a variable, the change of the variable can cause global matrix D and C change,
The corresponding relation changed between user and the base station for being user service, so as to change the speed of user.
Need to illustrate simultaneously, will be in transmission network limited capacity and transimission power in the step S15
Under constraints, to maximize user rate as target, δ optimal solution is found by dichotomy, so as to primarily determine that mixing
The base station with two kinds of mixed mode transmissions in CoMP transmission mechanism.
Alternatively, according to below equation computing system user rate, optimization aim is determined：
Wherein, βjFor user j dispatching priority weights.Determine constraints：
Wherein, PiAnd CiRespectively base station BiMaximum transmission power and the base station and centralized processing unit between transmission
Capacity.
Concrete application scene above-mentioned steps S15 mode can be：
Step S15-1, initialization iteration factor r=0, initializing variable δ codomain boundary values, i.e. a (0)=0, b (0)=
RSRPthreshold.Initialization result accuracy Tolerance=η, wherein η are a minimum positive number.Initialize intermediate variable c
=0.
Step S15-2, calculates f (δ) |δ=a (r)With f (δ) |δ=b (r), orderIf f (δ) |δ=a (r)≤f(δ)
|δ=b (r), a (r+1)=c, b (r+1)=b (r) are made, otherwise, a (r+1)=a (r), b (r+1)=c is made.
Step S15-3, repeat step S15-2, until | a (r)-b (r) |≤η stops when ungratified constraints
Only.
Step S15-4, obtains preliminary optimum results δ0=c.
Need to illustrate simultaneously, in the step S16, the preliminary optimum results for obtaining step S15 are carried out
Further optimization.If due to accuracy η limitation, the δ obtained in step S150For (δ0-η,δ0) coboundary or (δ0,δ0+
Lower boundary η), does not influence step S16 progress either way, might as well first assume δ0For (δ0-η,δ0) coboundary, it is another
Plant situation following steps equally applicable.
Step S16 can be in concrete application scene：
Step S16-1, initializes j=1.
Step S16-2, sets up user UjScope to be optimized in collection of base stations:
Step S16-3, ifGo to step S16-4；IfThen travel throughIn each base station, it is rightTake
Step S16-4, j=j+1, if j≤K, return to step S16-2；If j>K, algorithm terminates.
Can be simultaneously in network system resources such as transport network capacity and transimission power by the aforesaid way of the present embodiment
Band efficiency is maximized in the case of limited, the interference in C-RAN networks between the base station of dense deployment can be at least solved
Problem and the problem of user rate is maximized in the case that transport network capacity and transimission power are limited.
Embodiment 7
Fig. 6 is the schematic diagram of system model according to embodiments of the present invention, as shown in fig. 6,101 be Base Band Unit processing pond
BBU pool, S102 are the transmission network of finite capacity, and it is user's transmission that 103 parts, which illustrate radio frequency remote unit RRU collaboration,
Model.Wherein, 105,107 and 109 it is simple use JT modes to cooperate with to service for user 106, three RRU are user collaborative biography
Defeated user data；107th, 109 and 111 CB modes are used to be serviced for user 110 merely, 111 be that user transmits user data, 107
Evade the upward wave beam of user side with 109 collaborations；104th, the 105 and 109 pattern collaborations for using CB and JT to mix take for user 108
Business, 104 and 108 collaborations transmit user data for user, and the upward wave beam of user side is evaded in 105 collaborations.
The optimization cluster-dividing method step of customer-centric based on mixing CoMP transmission mode includes：
Step S301：Base station sends the RSRP of multiple base stations around reference signal, user's measurement, and generation one is on the use
The RSRP lists at family report nearest base station；
Step S302：The corresponding RSRP list informations of each user are reported and focus on list by base station by transmission network
Member；
Step S303：Centralized processing unit determines the initial of customer-centric according to the corresponding RSRP lists of each user
Sub-clustering, if the RSRP for a certain base station of correspondence that user receives meets following formula, the base station is added with the first of the user-center
Beginning sub-clustering：
RSRPmax-RSRPCoMP≤RSRPthreshold
Wherein, RSRPmaxFor maximum, RSRP in the corresponding RSRP lists of the userCoMPFor user correspondence can be added
Initial sub-clustering the corresponding value in RSRP lists in base station, RSRPthresholdTo preset fixed threshold.
Step S304：Because C-RAN uses TDD system, down channel estimation can be obtained by uplink channel estimation
Arrive.In the step, base station of the user into corresponding initial base station cluster calculates in terms of sending training sequence, base station and obtains channel shape
State information, and precoding is obtained according to channel condition information calculating, while precoding is sent into centralized processing unit；
Step S305：Centralized processing unit is by dichotomy, in transport network capacity and the limited constraint bar of transimission power
Under part, to maximize user rate as optimization aim, primarily determined that in initial sub-clustering using the base that JT modes are user service
Stand and use the base station that CB modes are user service.
Step S306：Centralized processing unit further uses the method for exhaustion of a small range, equally to maximize user rate
For optimization aim, the final use JT modes determined in sub-clustering are the base station of user service and the use of CB modes are user service
Base station.
Step S307：Base-band resource manages unit transmission means and the user carried according to used in base station concentratedly
Data are that bandwidth is distributed in base station.
Step S308：Use the sky for the carrying user data that the base station that JT modes are user service is user's transmission directive property
Between wave beam, the use of the base station that CB modes are user service is that user evades the upward spatial beams of the user side.
Include for the method and step of the above-mentioned steps S301 preliminary optimized algorithms of dichotomy being related into step S308
Step S401：Initialization iteration factor r=0, initializing variable δ codomain boundary values, i.e. a (0)=0, b (0)=
RSRPthreshold.Initialization result accuracy Tolerance=η, wherein η are a minimum positive number.Initialize intermediate variable c
=0；
Step S402：Calculate f (δ) |δ=a (r)With f (δ) |δ=b (r), order
Step S403：Determine whether there is f (δ) |δ=a (r)≤f(δ)|δ=b (r)Set up, be to go to step S404, otherwise turn
To step S405；
Step S404：Make a (r+1)=c, b (r+1)=b (r)；
Step S405：Make a (r+1)=a (r), b (r+1)=c；
Step S406：Determine whether there is | a (r)-b (r) |≤η sets up or is unsatisfactory for constraints, is to carry out step
S407, otherwise goes to step S402；
Step S407：Obtain preliminary optimum results δ0=c.
Wrapped for the method for above-mentioned steps S301 to the step S308 method of exhaustion optimized algorithms being related to, the step of this method
Include：
Step S501：Initialize j=1；
Step S502：User U is set up according to following formulajScope to be optimized in collection of base stations:
Step S503：If determining whether there isIt is to go to step S505, otherwise carries out step S504；
Step S504：TraversalIn each base station, it is rightTake
Step S505：J=j+1；
Step S506：Determine whether there is j>K, is to terminate algorithm, otherwise skips to step S502.
Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can
The program code for performing following steps to be arranged to storage to be used for：
Step S1：The RSRP lists that centralized processing unit receiving terminal is reported by base station, wherein, RSRP lists are used to remember
Record the RSRP of all base stations of terminal measurement covering terminal；
Step S2：Centralized processing unit determines the initial sub-clustering centered on terminal according to RSRP lists；
Step S3：Centralized processing unit determines final sub-clustering according to predetermined manner, wherein, the base station bag in the final sub-clustering
Include：Using JT modes and for terminal service base station, and using CB modes and for terminal service base station.
Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can
The program code for performing following steps to be arranged to storage to be used for：
Step S1：The RSRP lists that base station receiving terminal is reported, wherein, RSRP lists are used to record terminal measurement covering eventually
The RSRP of all base stations at end；
Step S2：Base station sends RSRP lists to centralized processing unit.
Step S3：The training sequence that base station receiving terminal is reported；
Step S4：Base station determines channel condition information according to training sequence, and obtains pre- according to channel condition information determination
Coding.
Alternatively, the specific example in the present embodiment may be referred to described in above-described embodiment and optional embodiment
Example, the present embodiment will not be repeated here.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and constituted
Network on, alternatively, the program code that they can be can perform with computing device be realized, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be shown to be performed different from order herein
The step of going out or describe, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (13)
1. a kind of method of sub-clustering, it is characterised in that including：
The Reference Signal Received Power RSRP lists that centralized processing unit receiving terminal is reported by base station, wherein, the RSRP
List is used for the RSRP for recording all base stations of the terminal measurement covering terminal；
The centralized processing unit determines the initial sub-clustering centered on the terminal according to the RSRP lists；
The centralized processing unit determines final sub-clustering according to predetermined manner, wherein, the base station in the final sub-clustering includes：Make
With joint transmission JT modes and be the base station of the terminal service, and using cooperative beam inborn nature CB modes and for the terminal
The base station of service.
2. according to the method described in claim 1, it is characterised in that the centralized processing unit is determined according to the RSRP lists
Initial sub-clustering centered on the terminal includes：
The centralized processing unit judges whether there is the first RSRP for meeting preparatory condition in RSRP lists；
When there is a RSRP in the RSRP lists, the centralized processing unit determines corresponding with the RSRP the
One base station；
The first base station is added in the initial sub-clustering by the centralized processing unit.
3. method according to claim 2, it is characterised in that the preparatory condition is：
RSRPmax-RSRPCoMP≤RSRPthreshold
Wherein, RSRPmaxFor the maximum in RSRP lists corresponding with the terminal, RSRPCoMPFor in the RSRP lists
Value corresponding with the base station for adding the initial sub-clustering, RSRPthresholdTo preset fixed threshold.
4. according to the method described in claim 1, it is characterised in that the centralized processing unit determines final according to predetermined manner
In sub-clustering using JT modes and for the terminal service base station, and using CB modes and for the terminal service base station wrap
Include：
The centralized processing unit is by dichotomy, under transport network capacity and the limited constraints of transimission power, with most
Bigization terminal speed is optimization aim, and the base station for using JT modes and being the terminal service is determined in the initial sub-clustering,
With using CB modes and for the terminal service base station；
The centralized processing unit uses the method for exhaustion, and determines to use in final sub-clustering as optimization aim to maximize terminal speed
JT modes in transmission means and be the base station of the terminal service, and using the CB modes in transmission means and be the terminal
The base station of service.
5. method according to claim 4, it is characterised in that
The base station for meeting following condition is the base station using JT modes：
0≤RSRPmax-RSRPJT≤RSRPthreshold-δ
The base station for meeting following condition is the base station using CB modes：
RSRPthreshold-δ≤RSRPmax-RSRPCB≤RSRPthreshold
Wherein, wherein, RSRPmaxFor the maximum in RSRP lists corresponding with the terminal, RSRPJTTo meet formula condition
Use the corresponding value in the RSRP lists in the base station of JT modes, RSRPCBTo meet the base that formula condition uses CB modes
Stand the corresponding value in the RSRP lists, RSRPthresholdTo preset fixed threshold；0≤δ≤RSRPthresholdFor variable,
Wherein, the change of the variable can cause the change of the corresponding relation between terminal and the base station for being the terminal service to change
The speed of terminal.
6. method according to claim 4, it is characterised in that
The optimization aim of maximization terminal speed is determined in the following manner：
<mrow>
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<mrow>
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<mo>)</mo>
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<mo>=</mo>
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<mo>=</mo>
<mn>1</mn>
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<msub>
<mi>&beta;</mi>
<mi>j</mi>
</msub>
<msub>
<mi>R</mi>
<mi>j</mi>
</msub>
</mrow>
Wherein, K is total number of terminals, βjFor the dispatching priority weights of terminal j；
The constraints is determined in the following manner：
<mfenced open = "" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<munderover>
<mi>&Sigma;</mi>
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<mi>K</mi>
</munderover>
<mo>|</mo>
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<msub>
<mi>d</mi>
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<mi>i</mi>
<mi>j</mi>
</mrow>
</msub>
<msub>
<mi>w</mi>
<mrow>
<mi>i</mi>
<mi>j</mi>
</mrow>
</msub>
<mo>|</mo>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>&le;</mo>
<msub>
<mi>P</mi>
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<mi>i</mi>
</mrow>
</mtd>
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<mtr>
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<munderover>
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</munderover>
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<mo>&le;</mo>
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<mo>,</mo>
<mo>&ForAll;</mo>
<mi>i</mi>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Wherein, dijAnd wijIt is the i-th row jth column element in JT matrixes and pre-coding matrix respectively；RjFor the terminal of j-th of terminal
Speed；PiAnd CiRespectively base station BiMaximum transmission power and the base station and the centralized processing unit between transmission hold
Amount.
7. method according to claim 4, it is characterised in that methods described also includes：
The centralized processing unit is according to the base station transmission means used and the number of terminals carried in the final sub-clustering of determination
Bandwidth is distributed according to for the base station, wherein, the transmission means includes JT modes and CB modes.
8. according to the method described in claim 1, it is characterised in that methods described also includes：
The centralized processing unit receives the precoding that the base station is determined according to the training sequence received, wherein, it is described pre-
Encode for indicate using JT modes and be the terminal service base station be the terminal transmission directive property and carrying data
Space velocity of wave, and using CB modes and be that the base station of the terminal service is that the terminal evades the upward sky of the terminal side
Between wave beam.
9. a kind of method of sub-clustering, it is characterised in that including：
The RSRP lists that base station receiving terminal is reported, wherein, the RSRP lists are used to record described in the terminal measurement covering
The RSRP of all base stations of terminal；
The base station sends the RSRP lists to centralized processing unit.
10. method according to claim 9, it is characterised in that methods described also includes：
The base station receives the training sequence that the terminal is reported；
The base station determines channel condition information according to the training sequence, and obtains pre- according to channel condition information determination
Coding.
11. a kind of device of sub-clustering, applied to centralized processing unit side, it is characterised in that including：
First receiving module, the RSRP lists reported for receiving terminal by base station, wherein, the RSRP lists are used to record
The RSRP of all base stations of the terminal measurement covering terminal；
First determining module, for determining the initial sub-clustering centered on the terminal according to the RSRP lists；
Second determining module, for determining final sub-clustering according to predetermined manner, wherein, the base station in the final sub-clustering includes：
Using joint transmission JT modes and be the base station of the terminal service, and using cooperative beam inborn nature CB modes and for the end
Hold the base station of service.
12. a kind of device of sub-clustering, applied to base station side, it is characterised in that including：
Second receiving module, the RSRP lists reported for receiving terminal, wherein, the RSRP lists are used to record the terminal
The RSRP of all base stations of the measurement covering terminal；
Sending module, for sending the RSRP lists to centralized processing unit.
13. a kind of system of sub-clustering, it is characterised in that including：Claim 11 be applied to centralized processing unit side device and
Claim 12 is applied to the device of base station side.
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| PCT/CN2017/080415 WO2017185994A1 (en) | 2016-04-27 | 2017-04-13 | Clustering method, device and system |
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|---|---|---|---|---|
| CN113923749A (en) * | 2020-07-10 | 2022-01-11 | 北京佰才邦技术股份有限公司 | Service cluster selection method and node equipment |
| CN115835339A (en) * | 2023-02-23 | 2023-03-21 | 中国移动通信有限公司研究院 | Collaborative computing method, device and system |
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| US20150092768A1 (en) * | 2013-09-27 | 2015-04-02 | Samsung Electronics Co., Ltd. | Methods and apparatus for discovery signals for lte advanced |
| CN104602347A (en) * | 2013-10-31 | 2015-05-06 | 株式会社Ntt都科摩 | Method and equipment for coordinating cell on plurality of resource blocks |
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| US9854597B2 (en) * | 2013-10-02 | 2017-12-26 | Cellos Software Ltd | Method and communication apparatus for resource allocation in wireless communication network |
| CN105744560B (en) * | 2014-12-12 | 2019-06-14 | 电信科学技术研究院 | The method and device that a kind of determining serving BS, measurement report |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905103A (en) * | 2012-12-27 | 2014-07-02 | 华为技术有限公司 | Cooperation method, network and user terminal |
| US20150092768A1 (en) * | 2013-09-27 | 2015-04-02 | Samsung Electronics Co., Ltd. | Methods and apparatus for discovery signals for lte advanced |
| CN104602347A (en) * | 2013-10-31 | 2015-05-06 | 株式会社Ntt都科摩 | Method and equipment for coordinating cell on plurality of resource blocks |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113923749A (en) * | 2020-07-10 | 2022-01-11 | 北京佰才邦技术股份有限公司 | Service cluster selection method and node equipment |
| CN113923749B (en) * | 2020-07-10 | 2023-08-01 | 北京佰才邦技术股份有限公司 | Service cluster selection method and node equipment |
| CN115835339A (en) * | 2023-02-23 | 2023-03-21 | 中国移动通信有限公司研究院 | Collaborative computing method, device and system |
| CN115835339B (en) * | 2023-02-23 | 2023-07-04 | 中国移动通信有限公司研究院 | Collaborative computing method, device and system |
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