CN106788624A - For the method and apparatus that access point cluster is communicated - Google Patents
For the method and apparatus that access point cluster is communicated Download PDFInfo
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- CN106788624A CN106788624A CN201510827438.1A CN201510827438A CN106788624A CN 106788624 A CN106788624 A CN 106788624A CN 201510827438 A CN201510827438 A CN 201510827438A CN 106788624 A CN106788624 A CN 106788624A
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- 238000000034 method Methods 0.000 title claims abstract description 77
- 230000005540 biological transmission Effects 0.000 claims abstract description 155
- 238000005457 optimization Methods 0.000 claims abstract description 85
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000010606 normalization Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 claims 1
- 238000004422 calculation algorithm Methods 0.000 description 31
- 239000003795 chemical substances by application Substances 0.000 description 12
- 238000013461 design Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 8
- 230000006854 communication Effects 0.000 description 7
- 230000011664 signaling Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 235000013350 formula milk Nutrition 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000205 computational method Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000005315 distribution function Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- H04B7/0426—Power distribution
- H04B7/043—Power distribution using best eigenmode, e.g. beam forming or beam steering
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
-
- 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
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink 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
- H04B7/0452—Multi-user MIMO systems
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
-
- 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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/386—TPC being performed in particular situations centralized, e.g. when the radio network controller or equivalent takes part in the power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/12—Access point controller devices
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Abstract
Embodiment of the disclosure provides a kind of method and apparatus communicated for access point cluster.With other access point cluster services in multiple user equipmenies, the method can include the access point cluster：Determine each user equipment Initial Trans and with the access point cluster in each access point between channel gain and noise power；The Initial Trans and channel gain of channel gain and noise power and other users equipment based on user equipment, obtain optimization transmission power of the user equipment for the access point cluster；And when the user equipment is directed to the optimization transmission power of other access point clusters for the optimization transmission power of the access point cluster less than the user equipment, determine the user equipment using the optimization transmission power for the access point cluster to the access point cluster transmission signal.
Description
Technical field
Embodiment of the disclosure relates generally to radio communication, and relates more particularly to one kind
For the method and apparatus that access point cluster is communicated.
Background technology
Super-intensive network (UDN) is a kind of the important of key capacity demand for being used to meet 5G
Technology, the spectrum efficiency the purpose is to improve unique user equipment and region, to solve 5G systems
The problem of the frequency spectrum resource bottleneck in system.Different from cellular network, super-intensive network design is almost
There is no rule, while complicated and uncertain jamming pattern is created, so service quality
(QoS) should be ensured on the basis of every user equipment is rather than every cell.Therefore,
In order to realize the capacity of 5G, network densification and the resource management of global coordination should be jointly
Carry out.
The purpose of embodiment of the disclosure be coordinate for super-intensive network up-link without
Line policy in resource management.Embodiment of the disclosure have studied for by service node and being serviced section
The strategy that point is matched, and precoding vector and the transmitting for dynamically distributing each node pair
Power, in order to optimizing systematic function and ensureing and the individual minimum performance grade of lifting.
Connection, beamforming design and transmission power there is presently no research user equipment
The solution of the problem of the combined optimization process of control.Most research applies greedy class
Type algorithm independently solves connection, beamforming design and the transmission power of user equipment
Control.User equipment is connected and the primary solutions of Power Control are from Sun R and Luo
Normalized fixed point iteration algorithm (the Globally optimal joint uplink base of Z Q
station association and power control for max-min fairness,Acoustics,
Speech and Signal Processing(ICASSP),2014 IEEE International
Conference on.IEEE,2014:454-458.)。
But, this algorithm has following limitation.First, this algorithm assumes that each is used
Family is only associated with an optimum base station for antenna, so not accounting for receiver beamforming
Device is designed.Second, above-mentioned document is not given to implement the clearly system mistake of this algorithm
Journey, including the control of air interface design, signaling consumption and signal transmitting etc..
The content of the invention
In view of above-mentioned technical problem present in prior art, the purpose of embodiment of the disclosure exists
In a kind of method and apparatus communicated for access point cluster are provided, to solve prior art
Present in above and other technical problem.
According to the first aspect of the disclosure, there is provided a kind of to be communicated for access point cluster
Method, described access point cluster and other access point cluster services are described in multiple user equipmenies
Method can include：Determine the Initial Trans and and described access point of each user equipment
Channel gain between each access point and noise power in cluster；Based on a user equipment
The channel gain and the noise power and other users equipment Initial Trans
With the channel gain, optimization transmitting of the user equipment for described access point cluster is obtained
Power；And be less than for the optimization transmission power of described access point cluster in the user equipment
When the user equipment is directed to the optimization transmission power of other access point clusters, it is determined that described
User equipment is using the optimization transmission power for described access point cluster to described access point collection
Group's transmission signal.
In certain embodiments, the method may further include：Based on each user equipment hair
The detectable signal penetrated determines the Initial Trans and the channel gain of each user equipment.
In certain embodiments, the method may further include：From every in described access point cluster
Individual access point is obtained between each access point in each user equipment and described access point cluster
Channel gain and noise power.
In certain embodiments, the method may further include：Based on the user equipment
The initial transmissions work(of the channel gain and the noise power and the other users equipment
Rate and the channel gain, calculate precoding of the described access point cluster for the user equipment
Vector；And it is the channel gain and the noise power based on the user equipment, described
The Initial Trans and the channel gain of other users equipment and the precoding
Vector, obtains optimization transmission power of the user equipment for described access point cluster.
In these embodiments, the method may further include：Use the precoding vector
To receive the signal of the user equipment transmitting.In these embodiments, the method can enter one
Step includes：The precoding vector is normalized.
In certain embodiments, the method may further include：Based on the user equipment
The initial transmissions work(of the channel gain and the noise power and other users equipment
Rate and the channel gain, calculate median transmission power；And launched using the median
Power substitutes the Initial Trans and is made iteratively the calculating, until median hair
Power convergence is penetrated for the optimization transmission power.
In these embodiments, the method may further include：Centre after iteration
The difference between the median transmission power before value transmission power and the iteration is less than pre-
When determining threshold value, determine that the median transmission power converges to the optimization transmission power.At this
In a little embodiments, the method may further include：During iterative calculation, to described
Median transmission power is processed to avoid it from exceeding maximum transmission power.
In certain embodiments, the method may further include：The user equipment is directed to
The optimization transmission power of described access point cluster is sent to coordination unit；And coordinate single from described
Unit receives whether the user equipment is less than for the optimization transmission power of described access point cluster
The user equipment is directed to the instruction of the optimization transmission power of other access point clusters.At this
In a little embodiments, the method can further include：Which user received from the coordination unit
Equipment should be by the instruction of described access point cluster service.
In certain embodiments, the Initial Trans of each user equipment can be each user
The maximum transmission power of equipment.In certain embodiments, the user equipment is directed to the access
The optimization transmission power of point cluster can cause that described access point cluster receives the user equipment
Signal meet the target Signal to Interference plus Noise Ratio of the user equipment.In certain embodiments, the side
Method can be performed by the head access point in described access point cluster.
According to the second aspect of the disclosure, there is provided a kind of to be communicated for access point cluster
Device, described access point cluster and other access point cluster services are described in multiple user equipmenies
Device can include：Determining unit, is configured to determine that the initial transmissions work(of each user equipment
Rate and with described access point cluster in each access point between channel gain and noise work(
Rate；Obtaining unit, is configured as the channel gain based on user equipment and described makes an uproar
The Initial Trans and the channel gain of acoustical power and other users equipment, obtain described
Optimization transmission power of the user equipment for described access point cluster；And the determining unit is entered
One step is configured as, and the optimization transmission power of described access point cluster is directed in the user equipment
When being directed to the optimization transmission power of other access point clusters less than the user equipment, it is determined that
The user equipment is using the optimization transmission power for described access point cluster to the access
Point set group's transmission signal.
Embodiment of the disclosure proposes and the selection of access point cluster, precoding vector is calculated and sent out
Penetrating Power Control carries out Mathematical Modeling, algorithm and the mechanism of combined optimization.Substitution is existing in advance
Collect complete channel condition information, the scheme of embodiment of the disclosure is only needed according to determining
The demand of journey delivers useful calculating information between access point cluster.
Brief description of the drawings
Detailed description below is read by reference to accompanying drawing, embodiment of the disclosure above-mentioned and
Other purposes, feature and advantage will be easy to understand.In the accompanying drawings, with exemplary rather than limit
The mode of property processed shows some embodiments of the disclosure, wherein：
Fig. 1 schematically shows being carried out for access point cluster in accordance with an embodiment of the present disclosure
The flow chart of the method for communication.
Fig. 2 schematically shows being carried out for access point cluster in accordance with an embodiment of the present disclosure
The signaling interaction diagram of the method for communication.
Fig. 3 schematically shows being carried out for access point cluster in accordance with an embodiment of the present disclosure
The block diagram of the device of communication.
Fig. 4 schematically shows algorithm in accordance with an embodiment of the present disclosure and two kinds refer to algorithm
All user equipmenies spectrum efficiency cumulative distribution function curve map.
Specific embodiment
Some exemplary embodiments shown in below with reference to the accompanying drawings describe the disclosure
Principle and spirit.It should be appreciated that describing these specific embodiments merely to making this area
Technical staff better understood when and realize the disclosure, and not limit this public affairs by any way
The scope opened.
Fig. 1 schematically shows being carried out for access point cluster in accordance with an embodiment of the present disclosure
The flow chart of the method 100 of communication.The targeted access point cluster of method 100 can be with other
Access point cluster service is in multiple user equipmenies.In certain embodiments, method 100 can be by
The device that is associated with access point cluster is performed.Especially, method 100 can be by herein slightly
Performed with reference to the device 300 of Fig. 3 descriptions afterwards.In certain embodiments, method 100 is performed
Device can be head access point in access point cluster.
As shown in Figure 1, method 100 can enter step 101 after start-up.
In step 101, the executive agent of method 100 can determine the initial transmissions of each user equipment
The channel between each access point in power and each user equipment and the access point cluster
Gain and noise power.
It will be understood to those skilled in the art that in the method 100 of execution, involved by method 100
And to multiple user equipmenies also without it is determined that being serviced by which access point cluster.Separately
Outward, also have no knowledge about should be using great transmission power come right to being defined as each user equipment
Its certain access point cluster transmission signal for being serviced.
Therefore, in certain embodiments, the first purpose of method 100 is that for method 100
Each user equipment in involved multiple user equipmenies determines preferred Service Access Point
Cluster, while determining each user equipment to Service Access Point cluster transmission signal when institute
The transmission power for using.Therefore, multiple user equipmenies can be first by an initial transmissions work(
Rate is launched.Method 100 can first determine the Initial Trans of each user equipment,
And each access point in each user equipment and the targeted access point cluster of method 100 it
Between channel gain and noise power, for making determination as above.
In certain embodiments, the executive agent of method 100 can be sent out based on each user equipment
The detectable signal penetrated determines the Initial Trans and channel gain of each user equipment.At this
In a little embodiments, each user equipment carrys out emission detection using respective Initial Trans to be believed
Number.In certain embodiments, the executive agent of method 100 can be from targeted access point set
Each access point in group obtains each access in each user equipment and the access point cluster
Channel gain and noise power between point.In these embodiments, in the access point cluster
The signal (for example, detectable signal) that each access point is launched according to each user equipment determines
Go out each user equipment and channel gain and noise power between oneself.
Then, method 100 can enter step 102.In a step 102, one can be based on
The letter between each access point in individual user equipment and the targeted access point cluster of method 100
Road gain and the noise power, and other users equipment Initial Trans and these its
The letter between each access point in his user equipment and the targeted access point cluster of method 100
Road gain come obtain the user equipment for the access point cluster optimization transmission power.
It will be understood to those skilled in the art that optimization transmission power herein is in view of institute
The Initial Trans of some user equipmenies and all user equipmenies and an access point cluster
In all access points between channel gain and noise power in the case of it is final globally true
Surely the optimization transmission power for drawing.Under the constraint of these conditions, may finally be in whole system
Level on draw the optimal Service Access Point cluster of each user equipment and the hair of optimization
Penetrate power.It will be understood to those skilled in the art that various algorithms or mathematics side can be used
Method obtains this global optimal solution, and these algorithms can disclose to embody by mathematics, this
A little mathematical formulaes may have the necessary parameter for the other factors such as mathematics realization.This public affairs
The embodiment opened is unrestricted in terms of specific algorithm or computational methods.
Additionally, those skilled in the art can also increase according to specific technological accumulation and inheritance and requirement
Plus or adjustment constraints.For example, the constraint of the total transmission power of user equipment can be increased
Condition, or user equipment target Signal to Interference plus Noise Ratio (SINR) constraints, etc..
In certain embodiments, the executive agent of method 100 can be based on the letter of the user equipment
Road gain and the Initial Trans and channel gain of noise power and other users equipment, meter
Calculate precoding vector of the access point cluster for the user equipment.It is then possible to based on the use
The channel gain and noise power of family equipment, the Initial Trans and channel of other users equipment
Gain and precoding vector, the optimization for obtaining the user equipment for the access point cluster are sent out
Penetrate power.In these embodiments, the executive agent of method 100 can first be calculated and is directed to
The reception precoding vector of each user equipment, is then further calculating each user equipment
To the optimization transmission power of the targeted access point cluster of method 100.In certain embodiments,
The executive agent of method 100 can receive user equipment transmitting using the precoding vector
Signal.In certain embodiments, the executive agent of method 100 can enter to the precoding vector
Row normalized.
In certain embodiments, the executive agent of method 100 can be based on the letter of the user equipment
The Initial Trans and channel of road gain and the noise power and other users equipment increase
Benefit, calculates median transmission power；And substitute initial transmissions using the median transmission power
Power is made iteratively the calculating, until the median transmission power converges to optimization transmitting work(
Rate.In these embodiments, the computational methods of iteration are employed to draw final optimization transmitting
Power.
In these embodiments, the median hair that the executive agent of method 100 can be after iteration
When difference between the median transmission power penetrated before power and iteration is less than predetermined threshold, it is determined that
Median transmission power converges to optimization transmission power.Those skilled in the art can be according to tool
The technological accumulation and inheritance of body sets the predetermined threshold with requiring.In these embodiments, method 100
Executive agent can during iterative calculation, median transmission power is processed with
It is avoided to exceed maximum transmission power.
Then, method 100 can enter step 103.In step 103, set in the user
The standby optimization transmission power for the access point cluster is accessed less than the user equipment for other
During the optimization transmission power of point cluster, determine that the user equipment is used for the access point cluster
Optimization transmission power is to the access point cluster transmission signal.
It will be understood to those skilled in the art that for each user equipment, it is directed to many
Each access point cluster in individual access point cluster can be calculated an optimization transmission power.
Therefore, between the plurality of access point cluster, can be excellent for for certain user equipment
Change transmission power to be compared, show that the optimization transmission power of minimum is defined as the user equipment
The transmission power for finally being used, while determining to calculate the optimization transmission power of the minimum
Access point cluster the user equipment is serviced.
In certain embodiments, can be directed to for the user equipment by the executive agent of method 100
The optimization transmission power of described access point cluster is sent to coordination unit；And connect from coordination unit
Whether the optimization transmission power for receiving the user equipment for the access point cluster sets less than the user
The instruction of the standby optimization transmission power for other access point clusters.In these embodiments, really
Fixed certain user equipment has the minimum optimization transmission power can be with for which access point cluster
Uniformly carried out at the coordination unit of centralization.As being carried out for coordination unit
It is determined that, each access point cluster needs each user equipment for being calculated oneself for originally connecing
The optimization transmission power of access point cluster.In these embodiments, the executive agent of method 100 can
With should be by the instruction of the access point cluster service from which user equipment coordination unit receives.
In certain embodiments, the Initial Trans of each user equipment can be each user
The maximum transmission power of equipment.It will be understood to those skilled in the art that using emission maximum work(
Rate is only a kind of specific example of embodiment of the disclosure as Initial Trans, this area
It is also possible that technical staff is appreciated that using other transmission powers as Initial Trans
's.In certain embodiments, optimization transmitting work(of the user equipment for described access point cluster
Rate can cause that the signal that described access point cluster receives the user equipment meets the user equipment
Target Signal to Interference plus Noise Ratio.In certain embodiments, method 100 can be by the access point cluster
Head access point perform.
After step 103 is completed, method 100 can terminate.
Hereinafter, the mathematical modulo of embodiment of the disclosure will be discussed from the angle of mathematical theory
Type.Consider a ultra dense set network, it includes U user equipment (UE), M connects
Access point (AP), these access points are grouped into I cluster.All of user equipment is shared common
Radio channel.Each user equipment is intended to be accessed with a service with its SINR targets
Point cluster is communicated.Meanwhile, each access point cluster includes more than one antenna, so that it
Multiple user equipmenies can be served.Because the densification of the access point in network, user equipment
The some Service Access Points around it can be selected.In embodiment of the disclosure, it can be assumed that
All of access point is divided into some clusters, and each user accesses an access point cluster, with
Reduce the complexity of Optimizing Mode.
As described above, the first purpose of embodiment of the disclosure is to the selection of AP clusters, in advance
Encoder is calculated and Power Control carries out combined optimization.This can mathematically be attributed to following
For dynamic subscriber's association and the optimization problem of receiver beamformer design：
P ＞ 0
au∈{C1,C2..., CI, u=1,2 ..., U (2)
Wherein puRepresent the transmission power of user equipment u, p=(p1,p2,…,pU)；auRepresent that user sets
The service AP clusters of standby u.
Constraints (1) above is the upper and lower bound for setting transmission power.Constraints
(2) it is for each user equipment sets Service Access Point cluster.Each for user and AP
To interference function be calculated as constraints (3).
Embodiment of the disclosure proposes one kind and is set for dynamic subscriber for above-mentioned optimization problem
Standby associating with access point cluster and the iterative algorithm of access point cluster beamforming design.
The set of user equipment is represented using u ∈ { 1,2 ..., U },Table
Show the set of access point cluster.
First, in the first step, all user equipmenies in user equipment u ∈ { 1,2 ..., U }
Use initial transmission power Pt=PmaxCarry out emission detection signal.Use peak power PmaxCome
Emission detection signal is only a kind of specific example of embodiment of the disclosure, those skilled in the art
Member is it is appreciated that as Initial Trans be also possible using other transmission powers.
Then, in the second step, for access point cluster i ∈ { c1,c2,…,clIn it is all
Access point cluster obtains channel gain by detecting the detectable signalValue
With noise power ni。
Then, in third step, t=0, p (0)=p are initially setmax, then perform such as
Under iterative calculation, until meeting conditionWherein ε can be basis
Actual techniques environment and the small value of requirement setting.
In step one is iterated to calculate, each access point i ∈ { c1,c2..., cI, according to below equation pin
Reception precoding vector and transmission power are calculated each user equipment respectively：
Wherein wCi,uRepresent access point cluster CiFor the precoding vector of user equipment u；On arrange
Two equatioies are represented to wCi,uIt is normalized；βuBe according to particular technique environment and require it is adjustable
The parameter of section, in certain embodiments, it could be arranged to 1；I represents unit matrix；Iu,Ci(p)
Represent in an iterative process user equipment u for access point cluster Ci middle transmission power level,
It finally converges to optimization transmission power level after iteration completion.
In step 2 is iterated to calculate, all of access point cluster can be byValue send
Give centralization telegon.Then, centralization telegon can find out satisfaction's
Access point cluster, wherein * represent optimal.Next iteration calculates used transmission power will
It is decided to be at centralization telegon
Wherein second equation is in order that the value of p meets the upper limit of transmission power in an iterative process
And lower limit, arrow represents assignment.Then, the p (t+1) that centralization telegon will be determined sends
To all of access point cluster and t=t+1 is set, to be iterated calculating.The skill of this area
Art personnel are appreciated that iterative calculation step 2 can also be in the help without centralization telegon
Under be carried out in a distributed manner.
Then, in four steps, each user equipment has been drawn iterative calculation is completed
After the precoding vector of preferred service access point cluster, the transmission power of optimization and optimization,
Centralization telegon can include the signal of user index to the transmitting of Service Access Point cluster, to refer to
Show its user equipment for being serviced.
Then, in the 5th step, access point cluster can send to the user equipment for being serviced
The convergency value of transmission power, that is, optimize transmission power.Then, the user equipment for being serviced can be with
Launch data to Service Access Point cluster using the optimization transmission power.Service Access Point cluster can
The data are received with the convergency value of the precoding vector drawn using iteration.
It will be noted that, mathematically it is analyzed, it is assumed that (p*, a*, w*) is optimization above
The optimization solution of the Mathematical Modeling of problem, then following formula can be drawn.
It is that may determine that vector function f (p*) is convergent function from above formula, it means that the optimization
Solution is unique and can be obtained by appropriate algorithm (for example, Fixed-Point Algorithm).
Described below with reference to Fig. 2 in accordance with an embodiment of the present disclosure in user equipment, access point
The example of a kind of specific communication process between cluster and centralization telegon.Fig. 2 is schematic
Show the method communicated for access point cluster in accordance with an embodiment of the present disclosure
Signaling interaction diagram.It will be understood to those skilled in the art that specific signaling depicted in figure 2
Only it is a kind of example of the disclosure, in specific implementation process, these signalings can be adjusted
Sequentially, omit or add new signaling, etc..The scope of the present disclosure is not specific by these
The limitation of signaling.
As shown in Figure 2, in step 201, all of user equipment can be using just
The transmission power P of beginningmaxEmission detection signal, the detectable signal can be connect by all of access point
Receive.As mentioned before, peak power P is usedmaxIt is only the disclosure to carry out emission detection signal
Embodiment a kind of specific example, it will be understood to those skilled in the art that using others
Transmission power is also possible as Initial Trans.
In step 202., all of access point can receive the detectable signal and by detection
Detectable signal obtains the channel gain and noise power of each user.
In step 203, all of access point can be grouped into some access point clusters, these
Access point cluster be during the process of iterative algorithm it is static, i.e., it is constant.Each access point
Cluster can jointly receive the uplink signal of serviced user equipment.Then, according to
For the channel gain and transmission power of access point cluster, each accesses point set to all user equipmenies
Group can respectively calculate the reception precoding vector and minimum transmitting work(for each user equipment
Rate, to meet Signal to Interference plus Noise Ratio (SINR) target for each user.Those skilled in the art
Member is it is appreciated that all of access point can also be the step for be grouped into some access point clusters
Initially just it is pre-arranged.
In step 204, all of access point cluster can be directed to the report of centralization telegon
The value of the minimum emissive power of each user equipment.
In step 205, centralization telegon can notify the service for each user equipment
Access point cluster and new transmission power.
In step 206, step 203 to 205 can be made iteratively to repeat to institute
The Service Access Point cluster and corresponding transmission power for having user equipment are optimized, Zhi Daoji
Middleization telegon finds constant for the transmission power of each user.
In step 207, when convergence is iterated to calculate, centralization telegon can connect to service
The transmitting of access point cluster each needs the index of the user equipment for being serviced.All of access point set
Group can preserve the precoding vector and the receipts of transmission power of the user equipment for being serviced
Value is held back, that is, optimizes precoding vector and optimization transmission power.
In a step 208, access point cluster can be in served user equipment forwarding step 207
Transmission power convergency value, that is, optimize transmission power.
In step 209, user equipment can be using the transmission power in step 208 come to clothes
Business access point cluster transmitting data.
In step 210, Service Access Point cluster can be excellent using what is preserved in step 207
Change precoding vector to receive data.
Fig. 3 schematically shows being carried out for access point cluster in accordance with an embodiment of the present disclosure
The block diagram of the device 300 of communication.In block diagram illustrated in fig. 3, represented using dotted line frame
Optional unit or component.It will be understood to those skilled in the art that illustrate only dress in Fig. 3
The unit or component that are closely related with embodiment of the disclosure in 300 are put, is specifically being put into practice
In, device 300 can include can normal operating other functions unit or component.This
Outward, there is necessary annexation between the unit or component shown in Fig. 3, for
Succinct consideration, these annexations are not depicted in figure.
As shown in Figure 3, can be wrapped for the device 300 that access point cluster is communicated
Include determining unit 301 and obtaining unit 302.In certain embodiments, determining unit 301 can
Be configured to determine that each user equipment Initial Trans and with the access point cluster
In each access point between channel gain and noise power.Obtaining unit 302 can be matched somebody with somebody
It is set to channel gain and noise power based on user equipment and other users equipment
Initial Trans and channel gain, obtain optimization of the user equipment for the access point cluster
Transmission power.In certain embodiments, determining unit 301 can be configured to,
The user equipment is directed to for the optimization transmission power of the access point cluster less than the user equipment
During the optimization transmission power of other access point clusters, it may be determined that the user equipment is used to be directed to and is somebody's turn to do
The optimization transmission power of access point cluster is to the access point cluster transmission signal.
In certain embodiments, determining unit 301 can be configured to：Based on each
The detectable signal of user equipment transmitting determines the Initial Trans and letter of each user equipment
Road gain.In certain embodiments, determining unit 301 can be configured to：From this
Each access point in access point cluster is obtained in each user equipment and the access point cluster
Channel gain and noise power between each access point.
In certain embodiments, device 300 may further include computing unit 303.Calculate
Unit 303 can be configured as based on the user equipment channel gain and noise power and its
The Initial Trans of his user equipment and the channel gain, calculate the access point cluster and are directed to
The precoding vector of the user equipment.Obtaining unit 302 can be configured to, and be based on
The channel gain and noise power of the user equipment, the Initial Trans of other users equipment and
Channel gain and precoding vector, obtain the user equipment for the excellent of the access point cluster
Change transmission power.In certain embodiments, device 300 may further include the first reception list
Unit 305.First receiving unit 305 can be configured with the precoding vector to receive this
The signal of user equipment transmitting.In certain embodiments, device 300 may further include and return
One changes unit 306.Normalization unit 306 can be configured as carrying out normalizing to precoding vector
Change is processed.
In certain embodiments, device 300 may further include iteration unit 304.Iteration
Unit 304 can be configured as based on the user equipment channel gain and noise power and its
The Initial Trans and channel gain of his user equipment, calculate median transmission power.Iteration
Unit 304 is configured to, and substituting Initial Trans using median transmission power changes
Calculated to generation, until median transmission power converges to optimization transmission power.
In certain embodiments, iteration unit 304 can be configured to：After iteration
Median transmission power and iteration before median transmission power between difference less than predetermined
During threshold value, determine that median transmission power converges to optimization transmission power.In certain embodiments,
Iteration unit 304 can be configured to：During iterative calculation, to median
Transmission power is processed to avoid it from exceeding maximum transmission power.
In certain embodiments, determining unit 301 can be configured to：By the user
Equipment is sent to coordination unit for the optimization transmission power of the access point cluster；And from coordination
Unit receives the user equipment should for whether the optimization transmission power of the access point cluster is less than
Instruction of the user equipment for the optimization transmission power of other access point clusters.
In certain embodiments, device 300 may further include the second receiving unit 302.
Second receiving unit 302 can be configured as should be by from which user equipment coordination unit receives
The instruction of the access point cluster service.
In certain embodiments, the Initial Trans of each user equipment can be each user
The maximum transmission power of equipment.In certain embodiments, the user equipment is directed to the access point set
The optimization transmission power of group allows that the signal that the access point cluster receives the user equipment is expired
The target Signal to Interference plus Noise Ratio of the sufficient user equipment.In certain embodiments, device 300 can be this
Head access point in access point cluster.
In embodiment of the disclosure, also carry out Computer Simulation to simulate the algorithm of the disclosure
Performance and antenna use.Fig. 4 schematically shows algorithm in accordance with an embodiment of the present disclosure
With the cumulative distribution function (CDF) of two kinds of spectrum efficiencies with reference to all user equipmenies of algorithm
Curve map.Detailed simulation parameter is given in following form 1.
Form 1
Herein between two algorithms with reference to proposed in algorithm and embodiment of the disclosure
Performance comparision is carried out.Algorithm 1 (Alg.1)：User equipment selects all in its macrocell
Access point is used as Service Access Point.All of access point jointly design their precoder with
Eliminate all interference in macrocell.Algorithm 2 (Alg.2)：Each user equipment is based on greediness
One access point of algorithms selection is used as Service Access Point.This access point clustering design it prelist
Code device is so that interference function is minimized.Algorithm 3 (Alg.3)：Carried in embodiment of the disclosure
Between the association in user equipment that goes out, precoding vector design and transmission power control
The algorithm of co-design.Result of the comparison is given in following form 2.
Form 2
By comparing the performance and antenna of form 2/power utilization rate, embodiment of the disclosure
Proposed in algorithm compared with algorithm 1, antenna utilization rate is reduced to 46%, and with calculation
Method 1 is compared with algorithm 2, and power utilization rate is reduced to 20%.Mould in embodiment of the disclosure
Type main purpose is to increase ensured service rather than every cell based on every user equipment
Quality Q oS, so compared with algorithm 1 and algorithm 2, the average spectral efficiency (ase) of algorithm 3 subtracts
Less and cell edge efficiency increase.Additionally, those skilled in the art can be directed in difference
The user in place changes SINR targets, balancing average value and cell edge spectrum efficiency.
In the description of embodiment of this disclosure, term " including " and its similar term should
It is interpreted as opening to include, i.e., " including but not limited to ".Term "based" should be understood to
" being based at least partially on ".Term " one embodiment " or " embodiment " should be understood
It is " at least one embodiment ".
It should be noted that embodiment of the disclosure can be by hardware, software or software and hardware
Combination realize.Hardware components can be realized using special logic；Software section can be deposited
Store up in memory, by appropriate instruction execution system, such as microprocessor or special designs
Hardware is performed.It will be appreciated by those skilled in the art that above-mentioned apparatus and method can be used
Computer executable instructions and/or be included in processor control routine are realized, for example, can compiled
Provided so in the data medium of the memory of journey or such as optics or electrical signal carrier
Code.
Additionally, although the operation of disclosed method is described with particular order in the accompanying drawings,
It is that this does not require that or implies that these must be performed according to the particular order operates, or must
The operation that must be performed shown in whole could realize desired result.Conversely, describe in flow chart
Step can change execution sequence.Additionally or alternatively, it is convenient to omit some steps, will be many
Individual step is combined as a step and performs, and/or a step is decomposed into execution of multiple steps.
It shall also be noted that the feature and function of two or more devices according to the disclosure can be at one
Embodied in device.Conversely, the feature and function of an above-described device can be further
It is divided into by multiple devices to embody.
Although describing the disclosure by reference to some specific embodiments, but it is to be understood that this
It is open to be not limited to disclosed specific embodiment.The disclosure is intended to the essence of appended claims
Included various modifications and equivalent arrangements in god and scope.
Claims (28)
1. a kind of method communicated for access point cluster, described access point cluster and its
, in multiple user equipmenies, methods described includes for his access point cluster service：
Determine each user equipment Initial Trans and with described access point cluster in
Channel gain and noise power between each access point；
The channel gain and the noise power and other use based on user equipment
The Initial Trans of family equipment and the channel gain, obtain the user equipment for described
The optimization transmission power of access point cluster；And
It is less than for the optimization transmission power of described access point cluster in the user equipment described
When user equipment is directed to the optimization transmission power of other access point clusters, the user is determined
Equipment is mass-sended using the optimization transmission power for described access point cluster to described access point collection
Penetrate signal.
2. method according to claim 1, further includes：
The initial of each user equipment is determined based on the detectable signal of each user equipment transmitting
Transmission power and the channel gain.
3. method according to claim 1, further includes：
Each user equipment is obtained from each access point in described access point cluster to be connect with described
Channel gain between each access point and noise power in access point cluster.
4. method according to claim 1, further includes：
The channel gain and the noise power based on the user equipment and it is described its
The Initial Trans of his user equipment and the channel gain, calculate described access point cluster pin
To the precoding vector of the user equipment；And
The channel gain and the noise power based on the user equipment, described other use
The Initial Trans and the channel gain of family equipment, and based on the precoding to
Amount, obtains optimization transmission power of the user equipment for described access point cluster.
5. method according to claim 1, further includes：
The channel gain and the noise power and other use based on the user equipment
The Initial Trans and the channel gain of family equipment, calculate median transmission power；
And
The Initial Trans are substituted using the median transmission power be made iteratively institute
Calculating is stated, until the median transmission power converges to the optimization transmission power.
6. method according to claim 5, further includes：
Median transmission power after iteration is sent out with the median before the iteration
When the difference penetrated between power is less than predetermined threshold, determine that the median transmission power is converged to
The optimization transmission power.
7. method according to claim 4, further includes：
The signal of the user equipment transmitting is received using the precoding vector.
8. method according to claim 4, further includes：
The precoding vector is normalized.
9. method according to claim 5, further includes：
During iterative calculation, the median transmission power is processed to avoid it
More than maximum transmission power.
10. method according to claim 1, further includes：
Optimization transmission power by the user equipment for described access point cluster is sent to association
Adjust unit；And
Optimization of the user equipment for described access point cluster is received from the coordination unit
Whether transmission power is directed to the optimization hair of other access point clusters less than the user equipment
Penetrate the instruction of power.
11. methods according to claim 10, further include：
Should be by described access point cluster service from which user equipment the coordination unit receives
Instruction.
12. methods according to claim 1, the wherein initial transmissions of each user equipment
Power is the maximum transmission power of each user equipment.
13. methods according to claim 1, further include：
The user equipment is controlled for the optimization transmission power of described access point cluster so that institute
The signal for stating the access point cluster reception user equipment meets the target letter of the user equipment
Dry ratio of making an uproar.
14. methods according to claim 1, wherein methods described is by described access point collection
Head access point in group is performed.
A kind of 15. devices communicated for access point cluster, described access point cluster and its
, in multiple user equipmenies, described device includes for his access point cluster service：
Determining unit, be configured to determine that each user equipment Initial Trans and with institute
State the channel gain and noise power between each access point in access point cluster；
Obtaining unit, is configured as the channel gain based on user equipment and described makes an uproar
The Initial Trans and the channel gain of acoustical power and other users equipment, obtain described
Optimization transmission power of the user equipment for described access point cluster；And
Wherein described determining unit is configured to, and is connect for described in the user equipment
The optimization transmission power of access point cluster accesses point set less than the user equipment for described other
During the optimization transmission power of group, determine that the user equipment is used for described access point cluster
Optimization transmission power is to described access point cluster transmission signal.
16. devices according to claim 15, wherein the determining unit further by
It is configured to：
The initial of each user equipment is determined based on the detectable signal of each user equipment transmitting
Transmission power and the channel gain.
17. devices according to claim 15, wherein the determining unit further by
It is configured to：
Each user equipment is obtained from each access point in described access point cluster to be connect with described
Channel gain between each access point and noise power in access point cluster.
18. devices according to claim 15, further include：
Computing unit, is configured as the channel gain based on the user equipment and described makes an uproar
The Initial Trans and the channel gain of acoustical power and the other users equipment, calculate
Precoding vector of the described access point cluster for the user equipment；And
The obtaining unit is configured to, and the channel based on the user equipment increases
The Initial Trans and the letter of beneficial and described noise power, the other users equipment
Road gain, and based on the precoding vector, obtain the user equipment and be directed to the access
The optimization transmission power of point cluster.
19. devices according to claim 15, further include：
Iteration unit, is configured as the channel gain based on the user equipment and described makes an uproar
The Initial Trans and the channel gain of acoustical power and other users equipment, calculate
Median transmission power；And
The iteration unit is configured to, and institute is substituted using the median transmission power
State Initial Trans and be made iteratively the calculating, until median transmission power convergence
It is the optimization transmission power.
20. devices according to claim 19, wherein the iteration unit further by
It is configured to：
Median transmission power after iteration is sent out with the median before the iteration
When the difference penetrated between power is less than predetermined threshold, determine that the median transmission power is converged to
The optimization transmission power.
21. devices according to claim 18, further include：
First receiving unit, is configured with the precoding vector and sets receiving the user
The signal that preparation is penetrated.
22. devices according to claim 18, further include：
Normalization unit, is configured as being normalized the precoding vector.
23. devices according to claim 19, wherein the iteration unit further by
It is configured to：
During iterative calculation, the median transmission power is processed to avoid it
More than maximum transmission power.
24. devices according to claim 15, wherein the determining unit further by
It is configured to：
Optimization transmission power by the user equipment for described access point cluster is sent to association
Adjust unit；And
Optimization of the user equipment for described access point cluster is received from the coordination unit
Whether transmission power is directed to the optimization hair of other access point clusters less than the user equipment
Penetrate the instruction of power.
25. devices according to claim 24, further include：
Second receiving unit, being configured as receiving which user equipment from the coordination unit should
By the instruction of described access point cluster service.
26. devices according to claim 15, wherein the first of each user equipment are originated
Penetrate the maximum transmission power that power is each user equipment.
27. devices according to claim 15, wherein the user equipment is for described
The optimization transmission power of access point cluster causes that described access point cluster receives the user equipment
Signal meet the target Signal to Interference plus Noise Ratio of the user equipment.
28. devices according to claim 15, wherein described device are described access points
Head access point in cluster.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510827438.1A CN106788624A (en) | 2015-11-24 | 2015-11-24 | For the method and apparatus that access point cluster is communicated |
| PCT/IB2016/001825 WO2017089897A1 (en) | 2015-11-24 | 2016-11-24 | Method and apparatus for communication of access point cluster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510827438.1A CN106788624A (en) | 2015-11-24 | 2015-11-24 | For the method and apparatus that access point cluster is communicated |
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| Publication Number | Publication Date |
|---|---|
| CN106788624A true CN106788624A (en) | 2017-05-31 |
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ID=57799738
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510827438.1A Pending CN106788624A (en) | 2015-11-24 | 2015-11-24 | For the method and apparatus that access point cluster is communicated |
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| Country | Link |
|---|---|
| CN (1) | CN106788624A (en) |
| WO (1) | WO2017089897A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022012362A1 (en) * | 2020-07-15 | 2022-01-20 | 中兴通讯股份有限公司 | Power control method and apparatus, and communication node, and storage medium |
-
2015
- 2015-11-24 CN CN201510827438.1A patent/CN106788624A/en active Pending
-
2016
- 2016-11-24 WO PCT/IB2016/001825 patent/WO2017089897A1/en active Application Filing
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| Title |
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| WEI LI ET AL: "Adaptive Joint Multi-cell Reception with Uplink Power Control and Beamforming", 《2010 5TH INTERNATIONAL ICST CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA》 * |
| XIAOJIA LU ET AL: "Comparison of Antenna Arrays in a 3-D Multiuser Multicell Network", 《2011 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC)》 * |
| XIAOJIA LU ET AL: "Joint power control, receiver beamforming and adaptive multi base station coordination for uplink wireless communications", 《2010 IEEE 21ST INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS WORKSHOPS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022012362A1 (en) * | 2020-07-15 | 2022-01-20 | 中兴通讯股份有限公司 | Power control method and apparatus, and communication node, and storage medium |
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|---|---|
| WO2017089897A1 (en) | 2017-06-01 |
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