CN107276651A - A kind of have a down dip angle and optimizing and the power distribution method of vertical sector splitting - Google Patents

A kind of have a down dip angle and optimizing and the power distribution method of vertical sector splitting Download PDF

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CN107276651A
CN107276651A CN201710553192.2A CN201710553192A CN107276651A CN 107276651 A CN107276651 A CN 107276651A CN 201710553192 A CN201710553192 A CN 201710553192A CN 107276651 A CN107276651 A CN 107276651A
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CN107276651B (en
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牛进平
李艳艳
索莲
李想
马跃
刘雨田
陈晓江
房鼎益
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Northwest University
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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
    • H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector 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
    • H04B7/0426—Power distribution
    • 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
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/06—Testing, supervising or monitoring using simulated traffic
    • 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]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
    • 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
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • 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
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • 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
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses have a down dip angle and optimizing and the power distribution method of a kind of vertical sector splitting, comprise the following steps：Downlink system is built, the downlink system includes K user and N number of frequency resource block is distributed with C cell, each cell；Each cell includes the N frequency resource blocks being multiplexed in interior sector and outer sector, interior sector and outer sector；Each MPS process has 1 base station, and each base station is provided with NtRoot transmitting antenna, the total transmission power of each cell is P；Assuming that total transmission power P is divided evenly interior sector and outer sector to each cell；When user k is scheduled, if the cell where user k is cell c, the optimal angle of declination of sector and outer sector in cell c is calculatedAccording to the optimal angle of declination of sector and outer sector in cell c

Description

A kind of have a down dip angle and optimizing and the power distribution method of vertical sector splitting
Technical field
The invention belongs to wireless communication technology field, it is related to a kind of have a down dip angle and optimizing and the power distribution of vertical sector splitting Method.
Background technology
Newest LTE-A standards the target of downlink and the message transmission rate of up-link be set to respectively 1Gbps and 500Mbps, or even require higher than 5G wireless system.In order to reach such target, many schemes are suggested, such as big rule Mould multi-input multi-output system (MIMO), active antenna system (AAS) etc..Different from extensive mimo system, AAS need not be Base station (BS) sets hundreds of or more antennas.AAS can form two or more wave beams, and its angle of declination can be long-range Regulation, and traditional antenna needs the lay down location of antenna to operate on the spot.Therefore, AAS can be in conventional sector Rigen according to network Actual conditions optimize angle of declination, so as to there is provided more preferable flexibility, can improve systematic function.It is crucial special as one of AAS Property, vertical sector splitting method can form new vertical sub- sector in traditional macrocell, point to the vertical of every individual sub- sector Wave beam has different angle of declinations, and every sub- sector can be multiplexed original frequency resource, improve the utilization rate of frequency resource. However, one of AAS facing challenges are how whole transimission powers to be given into different sub- sectors.In addition, being cracked into more Sub- sector after, positioned at cell edge number of users increase, due to the influence being interfered, the data transfer rate of these users will Reduction.
Document " S.E.Nai, Z.Lei, S.H.Wong, and Y.H.Chew, " Optimizing radionetwork parameters for vertical sectorization via Taguchi’s method,”IEEE Trans.Vehi.Tech., vol.64, the network reference services of vertical sector, these network parameter roots are have studied in 2016. " It is adjusted according to Taguchi method models, but mathematical analysis is not provided.Document " O.Nuri and C.Yilmaz, “Self-optimization of coverage and capacity inLTE using adaptive antenna Systems, " Aalto University, the performance in 2010 " is assumed based on user is equally distributed in same level Come what is analyzed.What is considered in the present invention is user distribution in three-dimensional scenic.Specifically, according to 3GPP consensus standards " TR 36.873Study on 3D channel model for LTE, 3GPP Std., Rev.12.2.0, Jul.2015. ", part User is evenly distributed in same level, and certain customers are in skyscraper.The present invention considers vertical sector splitting The optimization of angle of declination and power distribution strategies.The analytical expression of system after the cracking of vertical sector, Ran Houji are derived from first In the expression formula construction problem, it is proposed that a kind of method of optimization cracking sector angle of declination and distribution power.The inventive method Performance is better than existing method.
The content of the invention
It is an object of the invention to provide have a down dip angle and optimizing and the power distribution method of a kind of vertical sector splitting, solve existing There is the problem of reducing in technology in vertical splitting in sub- sector-edge user data transfer rate.The present invention is derived from vertical fan first The analytical expression of system after area's cracking, is then based on the expression formula construction problem, it is proposed that one kind optimization cracking sector has a down dip Angle and the method for distribution power.The performance of the inventive method is better than existing method.
The technical solution adopted in the present invention is,
A kind of have a down dip angle and optimizing and the power distribution method of vertical sector splitting, comprise the following steps：
Step 1, downlink system is built, the downlink system includes K is distributed with C cell, each cell Individual user；Each cell is vertically cleaved into interior sector and outer sector；The N number of frequency resource block of each cell reuse；
Each MPS process has 1 base station, and each base station is provided with NtRoot transmitting antenna, the total transmission power of each cell For P；
Step 2, if the total transmission power P of each cell is divided evenly interior sector and outer sector to the cell；
If the cell where user k is cell c, when user k is scheduled, sector in cell c is obtained by formula (20) Optimal angle of declinationWith the optimal angle of declination of outer sector
Wherein, k=1,2 ..., K,
RcFor the reachable message transmission rate sum in all frequency resource blocks in cell c interior sector or outer sector,V=0 and v=1, represents interior sector and exterior wing respectively Area, n=1,2 ..., N,Be from user k to cell i in v-th of sector large-scale channel information, c=1,2 ..., C, i=1,2 ..., C, i ≠ c,It is that user k power is distributed in cell c v-th of sector on frequency resource block n；
Step 3, the optimal angle of declination of sector in the cell c obtained according to step 2With the optimal angle of declination of outer sectorThe optimal power of sector and outer sector in cell c is obtained by formula (21)：
Wherein, RcFor the reachable message transmission rate sum on all resource blocks in cell c interior sector or outer sector,V=0 and v=1, represents interior sector and outer respectively Sector, n=1,2 ..., N,Be from user k to cell i in v-th of sector large-scale channel information,It is cell User k power, R are distributed on frequency resource block n in c v-th of sector0Transmitted for the minimum data of each scheduled user Speed, R0＞ 6bps.
Further, the optimal angle of declination of sector and outer sector in cell c is obtained in step 2 by formula (20)Bag Include：
Step 21, if the optimal angle of declination of cell c outer sectorIt is identical with cell c angle of declination；
Step 22, given threshold angle φth；
Step 23, ifIfSo that the R in formula (20)cObtain maximum, then interior sector it is optimal under Inclination angle
Further, the optimal power of sector and outer sector in cell c is obtained in step 3 by formula (21), including：
Step 31, if the number of users of sector is K ' in cell c；An optional user is used as interior wing from the user of interior sector Area user k ', k '=1,2 .., K '；
Step 32, if least resource block number M to interior sector users k ' schedulingk′More than the resource block of each interior sector users Number M0, then interior sector users k ' is put into set A；Wherein,Rk′It is interior sector users k ' in each resource block On average data rate,
Step 33, repeat step 31 to 32, until all users of sector are used as interior sector users in cell c K ', obtains set A={ Kt′,Kt′+1,...,Ki′}；Wherein Kt′≥1；
Step 34, if Kt≤k′≤Ki-Kt+ 1, then to interior wing area distribute resource block quantity beIf Ki-Kt+1 ≤k′≤Ki, then to interior wing area distribute resource block quantity beIf k '≤Kt- 1, the then resource block distributed Quantity is Mk′, wherein
The beneficial effects of the invention are as follows
It is of the invention compared with existing method, the angle of declination and power distribution strategies of the vertical splitting sector of combined optimization, with Existing method compared to can greatly lifting system overall performance.It is embodied in：
1) combine the angle of declination and power distribution strategies for considering vertical splitting sector, more preferable property can be provided for system Energy；
2) according to 3GPP consensus standards, it is contemplated that a kind of typical scene of the user in 3-dimensional spatial distribution；
3) performance of method proposed by the invention in terms of cell edge data rate and cell aggregate date rate is better than There is method.
Brief description of the drawings
Fig. 1 is in difference in the case of the angle of declination of sector, the performance of system average data transfer rate；
Fig. 2 only considers that vertical sector has a down dip the performance curve of angle and optimizing；
Fig. 3 is that the method for the present invention and only considering has a down dip and angle and optimizing and is not optimised the performance curve pair of angle of declination and power Than figure.
Embodiment
Below by drawings and examples, the invention will be further described.
Embodiment 1
Present embodiments provide have a down dip angle and optimizing and the power distribution method in a kind of splitting of vertical sector, specifically include with Lower step：
Step 1, downlink system is built, the downlink system includes K is distributed with C cell, each cell Individual user and N number of frequency resource block；In the present embodiment, each cell is two sectors by vertical splitting, be respectively in sector and Outer sector, antenna for base station two beams of formation have the vertical beams of different angle of declinations, are respectively directed to inside and outside two sectors, interior sector and Outer sector is multiplexed N number of resource block；
Each MPS process has 1 base station, and each base station is provided with NtRoot transmitting antenna, the total transmission power of each cell For P；Total transmission power by interior sector and outer sector after a cell vertically splitting is P；
According to 3GPP consensus standards " TR 36.873Study on 3D channel model for LTE, 3GPP Std., Rev.12.2.0, Jul.2015. ", it is interior for the base station in user's k and c cell
The level of outer sector, vertical and whole antenna radiation patterns can be modeled as following expression respectively：
Wherein, θcAnd θ3dBIt is horizontal beam optical axis angle and the half-power beam width of c cells respectively. And φ3dB The vertical angle from user's k to c cell base stations respectively, interior sector (v=0) and outer sector (v=1) vertical angle of declination and Vertical half-power beam bandwidth.AmIt is front and rear ratio, SLV is side lobe attenuation.
It is assumed that there is N number of resource block (RBs) sector, and all sectors are all multiplexed all frequency resources.When user's k quilts During scheduling, the signal received on the resource block n in the interior sector or outer sector of c cells can be expressed as：
Wherein,Be from user k be sent to i cells in v-th of sector base stations large-scale channel information, and be total The function of body antenna directional diagram.Therefore, this is also angle of declinationFunction.In (4) formula,Be be sent to from user k it is small The small yardstick channel information of v-th of sector base stations in area i, Regular ZF precoding respectively to Amount, the transmission signal on base station that signal transmission power and user k' provide service in i cells in v-th of sector.It is The noise that user k is produced in the c cells for providing service in v-th of sector on resource block n.Noise obeys multiple Gauss distribution,
It was found from (4) formula, when user k is scheduled, in c cells in reachable data in sector or outer sector on resource block n Transmission rate is represented by：
According to document " J.Fan, Z.Xu, and G.Y.Li, " Performance analysis of MU-MIMO indownlink cellular networks,”IEEE Commun.Lett.,vol.19,no.2,pp.223–226,2015. ", expression formula (5) can abbreviation be approximately
Wherein,It is noise power.
In (6) formula,WithIt is signal powers of the user k on cell c inner or outer sector resources block n and to make an uproar Acoustical power, can be expressed as
With
Wherein,
And
Due toWithGamma distribution is obeyed, scale parameter is as follows
Form parameter is as follows
So,
And
Therefore, (6) formula can be expressed as
It is overall in cell c to be represented by up to message transmission rate
This speed is angle of declination and the function of transmission power.
It is assumed that the interior sector and outer sector of all cells are provided with same angle of declination, designated as phi is angle of declination φ(v)Collection Close, v=0 and 1 represents interior sector and outer sector respectively.Ρ represents powerSet, be all users in all cells The power on resource block in outer sector.Then, problem can be structured as
s.t.
φm＜ φ(v)＜ φmax (19a)
For v=0 and 1, and have
For c=1 ..., C.Wherein, the φ in (19a) formulaminAnd φmaxIt is the minimum value and maximum of angle of declination respectively P in value, (19b) formula is total transmission power in a cell, and can be shared by inside and outside sector.If it is clear that Then user k does not use resource block n.
The problem of due in (19)-(19b) is non-convex, therefore is difficult to.Therefore problem is divided into two sons by us Part, is have a down dip angle and optimizing and power distribution part respectively.First, we are that optimal have a down dip is searched in each vertical sector Angle, then optimizes power distribution, to compensate the user of low data rate by reassigning power between user.
Step 2, it is assumed that total transmission power P is divided evenly interior sector and outer sector to each cell；
When user k is scheduled, if the cell where user k is cell c, sector in cell c is obtained by formula (20) With the optimal angle of declination of outer sector
Wherein, RcFor the reachable message transmission rate sum on all resource blocks in cell c interior sector or outer sector,In formula, v=0 and v=1 represent interior sector respectively With outer sector, n=1,2 ..., N,Be from user k to cell i in v-th of sector large-scale channel information,It is that user k power is distributed in cell c v-th of sector on frequency resource block n.Wherein,
In order to solve this problem, a threshold angle φ can be first foundth, to point to the border of interior sector, Ran Houfen Not in region φ(v)∈[φmin,φth] and φ(v)∈[φth,φmax] optimal interior sector and outer sector angle of declination are searched, with Make the R in formula (20)cReach maximum.
Although optimal angle of declination can be found by performing exhaustive search, this mode expends the time.Therefore, we are herein A son optimization angle of declination optimized algorithm is proposed, including：
Step 21, if cell vertically splitting after outer sector optimal angle of declinationIdentical with the angle of declination of cell, tradition is small Area sets angle of declination in arrangement system according to the parameter one-off optimization of cell, and angle of declination is set to fixed value afterwards, will not Optimized according to the actual distribution of user in system.
Step 22, given threshold angle φth；
Step 23, ifWhereinThe maximum that can be set for angle of declination, ifSo that in formula (20) RcObtain the optimal angle of declination of maximum, then interior sector
Step 3, the total transmission power of conventional cell is shared by two vertical sectors.In addition, when there is more sub- sectors, point Cloth increases in the user of cell boarder, and the performance of these users of dimension may decline.So the power distribution side proposed herein Case be in order to ensure or compensate those because vertical sector divides and causes the user of hydraulic performance decline, especially those interior sector sides In boundary, the user of center of housing estate was originally in.If the angle of declination of inside and outside sector is determined in angle of declination optimization part, and The resource block of uniform amount is assigned to each scheduled user.
Therefore, the optimal angle of declination of sector and outer sector in the cell c obtained according to step 2Obtained by formula (21) The optimal power of sector and outer sector in into cell c：
Wherein, RcFor the reachable message transmission rate sum on all resource blocks in cell c interior sector or outer sector,In formula, v=0 and v=1 represent interior sector and outer sector respectively, N=1,2 ..., N,Be from user k to cell i in v-th of sector large-scale channel information,It is the of cell c User k power is distributed in v sector on frequency resource block n,
Represent to distribute to the aggregate date rate on user k all resource blocks and be more than R0, wherein R0To be every The minimum data transmission rate of individual scheduled user, R0More than 6bps.
The optimal power of sector and outer sector in cell c is obtained in step 3 by formula (21), including：
Step 31, if the number of users of sector is K ' in cell c；An optional user is used as interior wing from the user of interior sector Area user k ', k '=1,2 .., K '；
Step 32, if least resource block number M to interior sector users k ' schedulingk′More than the resource block of each interior sector users Number M0, then interior sector users k ' is put into set A；Wherein,Rk′It is interior sector users k ' on each resource block Average data rate,
Step 33, repeat step 31 to 32, until all users of sector are used as interior sector users in cell c K ', obtains set A={ Kt′,Kt′+1,...,Ki′}；Wherein Kt>=1, K '≤K '；
Step 34, if Kt≤k′≤Ki-Kt+ 1, then the resource block quantity to interior sector users k ' distribution beIf Ki-Kt+1≤k′≤Ki, then to interior wing area distribute resource block quantity beIf k '≤Kt- 1, then distribute Resource block quantity is Mk′。
Due to distributing to the power of each user=distribute on resource block quantity × each resource block of each user Power, so obtaining the resource block quantity of interior sector users k ' distribution, you can obtain distributing to interior sector users k ' power.
The above method is to distribute to the resource block quantity of user to control to distribute to sector boundaries user by change Power.In addition, in the algorithm of proposition, the power on each resource block is identical, but it is allocated to the total of each user The resource block quantity that power is used by the user is determined.
Experimental result
In LTE-A downlink cellular networks, we have evaluated what is be suggested in vertical sector and legacy network The performance of system.In this emulation, a traditional circulating type for having 19 cells is laid out, and cell station spacing is the 500m. bases Total transimission power of standing is set to 46dBm, a width of 10MHz of band of system, and carrier frequency is 2GHz.We set thermal noise spectrum For -174dBm/Hz. in addition, the transmission antenna number of base station is 4 to density, and vertical half-wave powerbeam width is 8 degree, and most Big antenna gain, front and rear ratio, vertical side lobe attenuation is respectively set to 18,25,20dB.Antenna height is 25 meters.If do not examined Consider power optimization, each cell can be turned to two equal sectors of power by vertical sector.User distribution considers high level and built Situation about being likely to occur is built, 50% user is allocated in same level, remaining user is allocated (high-rise in high level Building is located at cell boarder).Thus, it is supposed that skyscraper user close to outer sector, remaining user is close to interior sector.
Fig. 1 is described in the case of different internal sector angle of declinations, the performance of average system message transmission rate.From this Individual it can be seen from the figure that, average system message transmission rate first rises to maximum, when interior sector angle of declination is more than fixed exterior wing Average system message transmission rate reduces during area's angle of declination.Therefore the angle of declination prioritization scheme is effective, can also be found Sector angle of declination in the optimization of region of search is tilted in this small scene.
Fig. 2 illustrates the accumulative density function (CDF) of the user throughput of angle and optimizing and Unified Power distribution that has a down dip, it was demonstrated that Cell edge and the performance of whole cell on outer sector.The power configuration of vertical sector be original half after, outer sector Inter-sector interference reduce, so as to improve the performance of outer sector.Due to the interference between the additional sectors behind vertical sector so that The penalty of sector boundaries user (the center cell user before vertical sector).It can be obtained from figure, vertical sector has Effect improves the performance of whole system but is degrading the performance of cell boarder.
Fig. 3 illustrates that the user throughput after power optimization adds up density function (CDF).As previously noted, By adjusting transimission power, power distribution is set to compensate for these sector borders user, especially sector boundaries user.From figure It can obtain, whole cell and the performance of cell boarder can be improved based on the algorithm.

Claims (3)

1. a kind of have a down dip angle and optimizing and the power distribution method of vertical sector splitting, it is characterised in that comprise the following steps：
Step 1, downlink system is built, the downlink system includes K use is distributed with C cell, each cell Family；Each cell is vertically cleaved into interior sector and outer sector；The N number of frequency resource block of each cell reuse；
Each MPS process has 1 base station, and each base station is provided with NtRoot transmitting antenna, the total transmission power of each cell is P；
Step 2, if the total transmission power P of each cell is divided evenly interior sector and outer sector to the cell；
If cell where user k is cell c, when user k is scheduled, sector is obtained in cell c most by formula (20) Excellent angle of declinationWith the optimal angle of declination of outer sector
Wherein, k=1,2 ..., K,
RcFor the reachable message transmission rate sum in all frequency resource blocks in cell c interior sector or outer sector,V=0 and v=1, represents interior sector and outer respectively Sector, n=1,2 ..., N,Be from user k to cell i in v-th of sector large-scale channel information, c=1, 2 ..., C, i=1,2 ..., C, i ≠ c,It is that user k is distributed in cell c v-th of sector on frequency resource block n Power；
Step 3, the optimal angle of declination of sector in the cell c obtained according to step 2With the optimal angle of declination of outer sector The optimal power of sector and outer sector in cell c is obtained by formula (21)：
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Wherein, RcFor the reachable message transmission rate sum on all resource blocks in cell c interior sector or outer sector,V=0 and v=1, represents interior sector and exterior wing respectively Area, n=1,2 ..., N,Be from user k to cell i in v-th of sector large-scale channel information,It is cell c V-th of sector user k power, R are distributed on frequency resource block n0Transmitted for the minimum data of each scheduled user Speed, R0＞ 6bps.
2. have a down dip angle and optimizing and power distribution method in vertical sector splitting as claimed in claim 1, it is characterised in that step The optimal angle of declination of sector and outer sector in cell c is obtained in rapid 2 by formula (20)Including：
Step 21, if the optimal angle of declination of cell c outer sectorIt is identical with cell c angle of declination；
Step 22, given threshold angle φth；
Step 23, ifIfSo that the R in formula (20)cObtain the optimal angle of declination of maximum, then interior sector
3. have a down dip angle and optimizing and power distribution method in vertical sector splitting as claimed in claim 1, it is characterised in that step The optimal power of sector and outer sector in cell c is obtained in rapid 3 by formula (21), including：
Step 31, if the number of users of sector is K ' in cell c；An optional user uses as interior sector from the user of interior sector Family k ', k '=1,2 .., K '；
Step 32, if least resource block number M to interior sector users k ' schedulingk′More than the number of resource blocks of each interior sector users M0, then interior sector users k ' is put into set A；Wherein,Rk′It is interior sector users k ' on each resource block Average data rate,
Step 33, repeat step 31 to 32, until all users of sector obtain by as interior sector users k ' in cell c To set A={ Kt′,Kt′+1,...,Ki′}；Wherein Kt′≥1；
Step 34, if Kt≤k′≤Ki-Kt+ 1, then to interior wing area distribute resource block quantity beIf Ki-Kt+1≤k′≤ Ki, then to interior wing area distribute resource block quantity beIf k '≤Kt- 1, then the resource block quantity distributed is Mk′, wherein
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