CN109362081A - Dispositions method with interior backhaul base station under a kind of super-intensive heterogeneous network - Google Patents

Dispositions method with interior backhaul base station under a kind of super-intensive heterogeneous network Download PDF

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Publication number
CN109362081A
CN109362081A CN201811478675.1A CN201811478675A CN109362081A CN 109362081 A CN109362081 A CN 109362081A CN 201811478675 A CN201811478675 A CN 201811478675A CN 109362081 A CN109362081 A CN 109362081A
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China
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base station
sbs
super
small base
interference
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CN201811478675.1A
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徐昌彪
郭瑞博
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Chongqing University of Post and Telecommunications
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Chongqing University of Post and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The present invention relates to the dispositions methods with interior backhaul base station under a kind of super-intensive heterogeneous network, belong to mobile communication field.This method will be applied with interior full-duplex communication and be used for small base station radio backhaul in super-intensive isomery cellular network, be interfered with coordination network so that power system capacity is maximum by disposing the small base station of full duplex of proper proportion.The described method includes: calculating downlink Signal to Interference plus Noise Ratio first under different dual-modes, power system capacity is obtained；Then it formulates constraint condition and maximizes target, target problem is modeled；Network interferences brought by different dual-modes are finally combined, propose that a kind of mixed zone inside/outside full-duplex mode selection algorithm disposes base station, and sequence executes and obtains final deployment scheme.Present invention full-duplex communication technology in junction belt on the super-intensive networking technology basis, further increases system spectral efficiency under conditions of meeting the lowest service demand and power constraint of user.

Description

Dispositions method with interior backhaul base station under a kind of super-intensive heterogeneous network
Technical field
The invention belongs to mobile communication technology field, it is related to the deployment with interior backhaul base station under a kind of super-intensive heterogeneous network Method.
Background technique
In recent years, mobile communication experienced the fast development from voice service to high speed broadband service.It is 10 years following, it is mobile It will be in explosive growth that network traffic data is estimated.In face of the growth requirement of the new business such as mobile Internet and Internet of Things, under One Generation Mobile Communication System needs to meet various application scenarios and type of service.On the one hand, as mobile Internet rapidly develops, Future will further change the interactive mode of human society information, provide virtual reality (VR), augmented reality (AR) etc. for user New business experience, so that the following mobile data flow be driven to increase rapidly；On the other hand, the fast development of Internet of Things makes object It interconnects extensively with object, the application such as smart home, intelligent medical treatment, car networking at that time is skyrocketed through, and will generate the link of magnanimity.
In order to meet the growth requirement of mobile Internet and Internet of Things, the research of current 5th generation (5G) mobile communication system Formulation with standard is being unfolded.5G is the third generation mobile communication system proposed towards the year two thousand twenty, in the availability of frequency spectrum and energy Efficacious prescriptions face proposes higher requirement, while will have in transmission rate and time delay, covering performance and system secure context and significantly mention It rises.In terms of improving the availability of frequency spectrum, the density for increasing small base station (Small base station, SBS) in unit area is Most effective means.In addition, will be communicated with interior full duplex (In-band full duplex, IBFD) (also known as complete double with frequency simultaneously Work communication) it is applied at the SBS of dense deployment, the base station IBFD is N number of cell user service and is returned simultaneously using IBFD technology Journey gives macro base station (Macro base station, MBS).This further increases system spectral efficiency, thus in hot localised points area Realize that the power system capacity of hundred times of magnitudes is promoted in domain.
The small base station of dense deployment full duplex can bring higher capacity to increase, but in practical applications, this will bring Many problems, such as the problems such as wireless backhaul, interference management, mobile management.And the application of IBFD technology can bring self-interference And more inter-cell interference and cross-layer interference problem.This brings severe challenge to the deployment of full duplex SBS.
In conclusion can effectively solve small base station radio backhaul by combining super-intensive networking technology and IBFD technology And improve system spectral efficiency.Using coordinate system interference maximize Full-duplex cellular network power system capacity as target, the present invention It is proposed a kind of mixed zone inside/outside full-duplex mode (I/OBFD) deployment strategy minimized based on system interference, this is super to solving The deployment of intensive cell base station is of great significance.
Summary of the invention
For the above problem of the existing technology, the present invention is proposed under a kind of super-intensive heterogeneous network with interior backhaul base station Dispositions method.For the different system interference types under SBS difference dual-mode, by the full duplex for disposing proper proportion SBS is effectively to coordinate inter-cell interference and cross-layer interference.
The present invention is the dispositions method with interior backhaul base station under a kind of super-intensive heterogeneous network, is mainly comprised the steps that
Step 1: calculating downlink Signal to Interference plus Noise Ratio under SBS difference dual-mode respectively, obtains power system capacity expression Formula；
Step 2: constraint condition is formulated, target problem is modeled；
Step 3: the dual-mode of small base station is determined according to mixed zone/inside and outside full duplex (I/OBFD) mode selection algorithm；
Step 4: sequence executes 1-N base station.
The step 1 calculates downlink Signal to Interference plus Noise Ratio under SBS difference duplex transmission mode respectively: formula (1) is macro Community user transmission link Signal to Interference plus Noise Ratio；Formula (2) (3) is that SBS work is believing dry make an uproar with the transmission link under outer backhaul pattern Than；Formula (4) (5) is that SBS works with the transmission link Signal to Interference plus Noise Ratio under interior backhaul pattern；Thus power system capacity formula is obtained (6)。
The step 2 formulates constraint condition, models to target problem, shown in objective function such as formula (7), wherein Prove that objective function is one about xi The Nonlinear Nonconvex combinatorial optimization problem of ∈ { 0,1 }.This is a np hard problem.
S.t.
C1:
C2:
C3:
C4:
C5:
C6:i≤N, S >=K, S >=N, (13)
The step 3 determines the dual-mode of SBS according to mixing I/OBFD mode selection algorithm.Algorithm includes according to SBS The distance between MBS, channel gain and base station transmitting power etc., SBS is ranked up, such as { SBS1,SBS2,...,SBSN}； According to link channel gain between all SBS, calculates Signal to Interference plus Noise Ratio and obtain the neighbor map and adjacency matrix B=[η of SBSi,j]N×N,The local system capacity under two kinds of dual-modes is calculated separately according to adjacent battle array；It calculates interference cost to be compared, so Model selection is carried out according to rule afterwards.
The step 4 is executed according to the SBS arrangement order sequence provided in step 3, obtains finally disposing result.
The beneficial effects of the present invention are: for the deployment issue with interior backhaul base station in super-intensive isomery cellular network, Using the SBS dispositions method of mixing I/OBFD mode.According to the interference type under SBS difference dual-mode, interference cost is formulated, It is reasonable to coordinate inter-cell interference and cross-layer interference, system spectral efficiency can be effectively improved, increase power system capacity.
Detailed description of the invention
Fig. 1 is two layers of intensive isomery beehive network system model in the embodiment of the present invention
Fig. 2 is interference example of the SBS work under OBFD mode in the embodiment of the present invention
Fig. 3 is interference example of the SBS work under IBFD mode in the embodiment of the present invention
Fig. 4 is method implementation steps flow chart in the embodiment of the present invention
Fig. 5 is that I/OBFD mode selection algorithm flow chart is mixed in the embodiment of the present invention
Specific embodiment
To make goal of the invention, technical solution and advantage express clear in further detail, the present invention is done with reference to the accompanying drawing It is further described.
Application of the present invention based on the IBFD communication technology in super-intensive cellular network wireless backhaul, establishes pass In the optimal model of the rationally deployment base station IBFD problem, a kind of approximation algorithm for this model is devised, thus A kind of mixing I/OBFD mode selection scheme is arrived.Simulation result shows to eliminate high self-interference and SBS appropriate is close Degree, mixing I/OBFD mode than conventional half duplex mode and full-duplex mode has higher power system capacity, can also effectively assist Adjusting system interference.
Fig. 1 is two layers of intensive isomery beehive network system deployment scenario, knowledge and low function including high power transmission The microcellulor layer of rate transmission.Wherein MBS and SBS is respectively macro base station and small base station, MUE and SUE be respectively macrocell user and Small community user.MBS provides service for K MUE, it is assumed that N number of SBS uses random distribution, with interior full duplex base station (IBFD- SBS it) is serviced for S SUE and uses the backhaul simultaneously of IBFD technology to MBS.
Fig. 2 is that SBS works interference type example under OBFD mode, when SBS works in OBFD mode can simultaneously by Interference to work in the mode Neighbor cell IBFD and the mode Neighbor cell OBFD.The meeting when macrocell and cell are covered with frequency SBS is introduced to interfere the cross-layer of MUE.
Fig. 3 is that SBS works interference type example under IBFD mode, when SBS work is in IBFD mode, will receive phase Interference of neighbour's work in IBFD Mode S BS.Since access and backhaul transport use same frequency spectrum band, to generate from MBS to SUE Cross-layer interference.
Fig. 4 is method implementation steps flow chart in the embodiment of the present invention, the described method includes: first in different dual-modes Lower calculating downlink Signal to Interference plus Noise Ratio, obtains power system capacity；Then formulate constraint condition and maximize target, to target problem into Row modeling；Network interferences brought by different dual-modes are finally combined, propose a kind of mixed zone inside/outside full-duplex mode selection Algorithm disposes base station, and sequence executes and obtains final deployment scheme.
Fig. 5 is mixing I/OBFD mode selection algorithm flow chart, and the algorithm is the following steps are included: 501: N number of SBS is carried out Priority ranking；502: building network interferences open up complement, obtain the adjoining battle array about SBS；503: calculating separately the different duplexs of SBS Link Signal to Interference plus Noise Ratio under mode；504: calculating interference cost and be compared, and carry out model selection according to rule；505: sequence Execute N number of small base station.
Specific technical solution is as follows:
Step 501: by the transmission power, coverage area of different type base station, institute's energy in super-intensive isomery cellular network The maximum number of user enough serviced is different, will according to the channel gain and the information such as base station transmitting power between SBS and MBS SBS carries out descending arrangement, such as { SBS1,SBS2,...,SBSN}.Initial SBS is set1=1 (as IBFD mode), this be in order to System spectral efficiency is improved, the priority of setting IBFD mode is greater than OBFD mode, and pays the utmost attention to when carrying out SBS deployment IBFD mode.
Step 502: setting inter-cell interference threshold value calculates the link Signal to Interference plus Noise Ratio between SBS, and building network interferences are opened up Complement.Adjacency matrix B=[the η between SBS is obtained according to formula (14)i,j]N×N,Wherein ri,jIndicate SBSiIt sends To SUEjUseful signal and interference signal ratio, ΓthIt is interference signal threshold value.
Step 503: according to ξi=Ci,o-CIWithInter-cell interference and cross-layer interference cost are formulated respectively, according to public affairs Formula (15) calculates SBSiWith the power system capacity of its all adjacent S BS.
Step 504: according to the adjacency matrix in step 402, SBSiThe information for collecting base station adjacent thereto substitutes into formula (15) calculated result, and dual-mode is selected according to following rule.
Situation one: if ξI=0, then xi=1
Situation two: if ξI≠0,ξo≠ 0, then
Situation three: if ξI≠0,ξo=0, then
Step 505: according to { SBS1,SBS2,...,SBSNSequence execution, the full-duplex mode matrix of system is finally obtained, I.e. a kind of dispositions method for mixing I/OBFD backhaul base station.

Claims (5)

1. the dispositions method with interior backhaul base station under a kind of heterogeneous network for super-intensive, which is characterized in that will be with interior full duplex The communication technology is for based on system interference is minimized, passing through portion in the small base station access link and backhaul link of super-intensive networking Administration's proper proportion is mainly comprised the steps that with interior backhaul base station with improving power system capacity
Step 1: downlink Signal to Interference plus Noise Ratio is calculated under SBS difference dual-mode respectively, obtains power system capacity expression formula；
Step 2: constraint condition is formulated, target problem is modeled；
Step 3: the dual-mode of small base station is determined according to mixed zone/inside and outside full duplex (I/OBFD) mode selection algorithm；
Step 4: sequence executes 1-N base station.
2. scheme according to claim 1, which is characterized in that the step 1 is based under small base station difference dual-mode Disturbance type calculates separately the downlink transfer link Signal to Interference plus Noise Ratio of macrocell user, small base station and small community user, obtains Power system capacity expression formula.
3. scheme according to claim 1, which is characterized in that the step 2 formulates constraint condition, to target problem into Row modeling, and prove that the objective function is Nonlinear Nonconvex combinatorial optimization problem.
4. scheme according to claim 1, which is characterized in that the step 3 proposes mixing I/OBFD model selection and calculates Method, including according to the distance between small base station and macro base station, channel gain and base station transmitting power etc., small base station is carried out preferential Grade sequence, such as { SBS1,SBS2,...,SBSN}；Inter-cell interference threshold value is set, according to all small base station present positions and channel Gain calculates inter-cell transmissions link Signal to Interference plus Noise Ratio and obtains the neighbor map and adjoining battle array of small base station, such as:The local system capacity under two kinds of dual-modes is calculated separately according to adjacent battle array；Calculate interference generation Valence is compared, and carries out model selection according to rule.
5. scheme according to claim 1, which is characterized in that the step 4 is according to the arrangement order provided in step 3 Sequence executes, and obtains finally disposing result.
CN201811478675.1A 2018-12-05 2018-12-05 Dispositions method with interior backhaul base station under a kind of super-intensive heterogeneous network Pending CN109362081A (en)

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CN113473494A (en) * 2021-05-24 2021-10-01 北京邮电大学 Method for managing cross-link interference

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CN101184324A (en) * 2006-11-13 2008-05-21 华为技术有限公司 Frequency spectrum detecting and sharing method, system, user facility and device
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