CN114499616A - Resource allocation method for relieving cellular network interference - Google Patents

Resource allocation method for relieving cellular network interference Download PDF

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Publication number
CN114499616A
CN114499616A CN202210132940.0A CN202210132940A CN114499616A CN 114499616 A CN114499616 A CN 114499616A CN 202210132940 A CN202210132940 A CN 202210132940A CN 114499616 A CN114499616 A CN 114499616A
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base station
user
sub
communication
channel
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刘乔寿
邹建纹
谷颖辰
王汝言
吉福生
吴大鹏
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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
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
    • 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
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

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

Abstract

The invention relates to a resource allocation method for relieving cellular network interference, which belongs to the technical field of communication and comprises the following steps: s1: determining a beam aiming direction of a base station serving a user based on a beam aiming scheme; s2: determining an interference base station according to the beam aiming direction of a base station service user; s3: and determining a channel allocation scheme according to the interference base station to relieve the user interference. The invention obtains the real-time effective beam radiation range according to the real-time beam aiming direction of the base station service user, judges whether the user requesting communication at the same time is positioned in the effective beam radiation range of other base stations except the target base station, determines the second near interference base station, avoids the conflict between the sub-channel selected by the user requesting communication at the same time and the sub-channel selected by the user in the effective radiation direction of the second near interference base station at the same time as far as possible, and closes the sub-channel without the user needing service to reduce the network interference.

Description

Resource allocation method for relieving cellular network interference
Technical Field
The invention belongs to the technical field of communication, and relates to a resource allocation method for relieving cellular network interference.
Background
With the official investment of the fifth generation mobile communication technology, various 5G network-compatible mobile devices produced by communication enterprises are also in succession and the increasing number and types of mobile devices make data traffic appear to increase explosively, so that the performance requirements of people on the network are higher and higher, which burdens the cellular network. In addition, due to the scarcity of radio spectrum resources, this presents a serious challenge to mobile communication networks and communication enterprises. Therefore, how to reduce the burden of the cellular network and improve the utilization rate of the spectrum resources is very important.
In order to meet the requirements of people on data flow, the deployment density of small base stations in a network is increased sharply, and the distance between the base stations is gradually reduced, so that the network topology structure becomes more complicated, and the interference types become diversified. At this time, the user will be subjected to complex inter-cell interference, so that the network coverage probability and throughput are reduced. From the statistical average, when the user selects the base station with the strongest signal strength for access, the base station with the strongest signal strength is probably the base station closest to the user, so the interference suffered by the user mainly comes from the neighboring base stations, especially the second closest base station. If the interference caused by the second near base station can be reduced, the communication quality of the user can be obviously improved; on the contrary, if the inter-cell interference caused by the rapid increase of the density of the network base stations cannot be effectively processed, the performance gain caused by the small base stations is submerged in the endless interference. Therefore, coordinating inter-cell interference in ultra-dense cellular networks to improve user performance is an important research direction.
At present, directional antennas are introduced in a large number of researches, and by installing the directional antennas on a small cell and utilizing narrowband beamforming of the directional antennas, interference among cells can be caused only when the directional antennas collide with beams of adjacent cells, and the interference among the cells can be effectively avoided when the beams are staggered, so that the strength of signals expected by users can be enhanced, and the interference to users of the adjacent cells can be reduced. When the existing literature is combined to research a cellular network, an isotropic omnidirectional antenna is usually adopted, a beam formed by the omnidirectional antenna uniformly radiates and covers the whole sector in the 2 pi horizontal direction, and the modeling method is necessarily overlapped with a sector beam of an adjacent cell, so that inter-cell interference is caused.
Disclosure of Invention
In view of the above, the present invention provides a resource allocation method for mitigating interference of a cellular network.
In order to achieve the purpose, the invention provides the following technical scheme:
a resource allocation method for mitigating cellular network interference, comprising the steps of:
s1: determining a beam aiming direction of a base station serving user based on a beam aiming scheme;
s2: determining an interference base station according to the beam aiming direction of a base station service user;
s3: and determining a channel allocation scheme according to the interference base station to relieve the user interference.
Further, in step S1, the distance between the user and the base station is used for distance sorting, the user is associated with the nearest base station, all base stations perform directional transmission on the user through beamforming, the effective coverage angle of beamforming is Ψ, the user and the base station are randomly distributed in a two-dimensional space, the network spectrum resource multiplexing factor is 1, and each base station has NcAvailable subchannels that are orthogonal in frequency domain; determining the beam aiming direction of each base station serving its associated user based on a beam aiming scheme according to the spatial positions of the user and the base station in a two-dimensional coordinate system with the base station as the center and the counterclockwise direction as the positive
Figure BDA0003495018060000021
The beam alignment scheme refers to that a base station adaptively adjusts the aiming direction of beam forming according to the position of a communication user and the aiming direction is aligned with the communication user, and the constraint condition of the effective coverage angle of the beam forming is psi ∈ (0,2 pi)]The beam aiming direction is constrained by
Figure BDA0003495018060000022
Further, the step S2 specifically includes the following steps:
s21: obtaining the beam aiming direction of the potential interference base station at the same moment according to the position of the communication requesting user, and obtaining the effective beam radiation range of the potential interference base station based on the beam forming effective coverage angle;
s22: calculating an included angle between the communication requesting user and the potential interference base station by taking the potential interference base station as a center;
s23: and judging whether the communication requesting user is in the effective beam radiation range of the potential interference base station at the same moment according to the included angle between the communication requesting user and the potential interference base station, and determining the interference base station.
Further, the step S21 specifically includes: the potential interference base stations comprise all other base stations except the target base station; at the same time, according to the position of the potential interference base station service user of the communication request user, aiming the beam of the potential interference base station service user
Figure BDA0003495018060000023
On both sides, the range of the angle between the two directions, in which the effective radiation angle Ψ of the antenna is reduced to one half, is the effective beam radiation range, specifically, when
Figure BDA0003495018060000024
Real-time effective beam radiation range is
Figure BDA0003495018060000025
As a central line, to
Figure BDA0003495018060000026
In order to be the lower boundary,
Figure BDA0003495018060000027
a range that is an upper boundary; when in use
Figure BDA0003495018060000028
Real-time effective beam radiation range is
Figure BDA0003495018060000029
As a central line, to
Figure BDA00034950180600000210
In order to be the lower boundary,
Figure BDA00034950180600000211
a range that is an upper boundary; otherwise, the real-time effective beam radiation range is
Figure BDA00034950180600000212
Is the lower boundary of the flow path,
Figure BDA00034950180600000213
is the range of the upper bound.
Further, the step S22 specifically includes: and determining an included angle theta epsilon (0,2 pi) between the request communication user and the potential interference base station according to the space positions of the request communication user and the potential interference base station by taking the potential interference base station as a center and taking the anticlockwise direction as positive.
Further, the step S23 specifically includes: when the requesting communication subscriber is within the effective beam radiation range of its potentially interfering base station at the same time, i.e. when
Figure BDA00034950180600000214
Or
Figure BDA00034950180600000215
Or
Figure BDA0003495018060000031
Then, the potential interfering base station is determined to be an interfering base station; and determining a second near interference base station of each user according to the Euclidean distance between the user and the interference base station.
Further, the channel allocation scheme in step S3 is: at the same time, the requesting communication user can only occupy one sub-user at mostEach sub-channel can only provide service for one communication requesting user at most, and the distribution of the sub-channels follows the random distribution principle; with Ni,eIndicating the number of currently active subchannels of base station i,
Figure BDA0003495018060000032
indicating the real-time occupancy of subchannel j at base station i,
Figure BDA0003495018060000033
representing the real-time occupation situation of a sub-channel j on a second near-interference base station of the communication requesting user;
Figure BDA0003495018060000034
indicating that the sub-channel j is free,
Figure BDA0003495018060000035
beam pointing direction representing a second near-interfering base station serving user of said requesting communication user according to the same time instant
Figure BDA0003495018060000036
The sub-channel j of the second near-interference base station, although idle, cannot be allocated to this time
Figure BDA0003495018060000037
Or
Figure BDA0003495018060000038
Or
Figure BDA0003495018060000039
The user in the direction of the user,
Figure BDA00034950180600000310
indicating that subchannel j has been occupied by a user within its effective radiation range.
Further, the step S3 includes: the target base station randomly selects an idle sub-channel BjTo be allocated to the requesting communication user, before determining allocation, the day of the second near-interference base station is judgedWhether a subscriber in the effective radiation range of the line already occupies the same frequency sub-channel BjIf B isjIn idle state, marking that the sub-channel can not be allocated to the user in the effective radiation range of the antenna of the second near interference base station, unless the target base station has no other idle sub-channel to be allocated to the requesting communication user, the requesting communication user randomly selects one other idle sub-channel BjThe decision is again made until a satisfactory subchannel is found and allocated to the requesting communication subscriber.
Further, the step S3 specifically includes the following steps: the target base station randomly selects one to satisfy
Figure BDA00034950180600000311
Idle subchannel BjThe beam aiming direction of the interference base station service user which is distributed to the request communication user and is second near to the request communication user at the same time
Figure BDA00034950180600000312
Effective beam radiation range of second near-interference base station
Figure BDA00034950180600000313
Or
Figure BDA00034950180600000314
Or
Figure BDA00034950180600000315
The inner user is to avoid using sub-channel BjWhen a sub-channel B of a second near-interference base station of a communication user is requestedjAt idle, mark BjEffective radiation range that cannot be allocated to a second near-interfering base station at the same time
Figure BDA00034950180600000316
Or
Figure BDA00034950180600000317
Or
Figure BDA00034950180600000318
User in the target base station, and the target base station will sub-channel BjTo the requesting communication user;
if the sub-channel B of the second near-interference base station of the communication requesting userjAre all already occupied, i.e.
Figure BDA00034950180600000319
Then the target base station reselects other satisfaction
Figure BDA0003495018060000041
And avoiding collision of the sub-channel selected by the requesting communication user with the sub-channel selected by the user in the effective radiation range of the second near-interference base station at the same time unless the target base station has no other free sub-channel to allocate to the requesting communication user, namely Ni,e＝1，
Figure BDA0003495018060000042
Then, consider subchannel BjAnd allocating the sub-channels to the communication requesting users, and when all the communication requesting users are responded, the target base station closes the remaining unallocated effective sub-channels.
The invention has the beneficial effects that: the invention obtains the real-time effective beam radiation range according to the real-time beam aiming direction of the base station service user, judges whether the user requesting communication at the same time is positioned in the effective beam radiation range of other base stations except the target base station, determines the second near interference base station, avoids the conflict between the sub-channel selected by the user requesting communication at the same time and the sub-channel selected by the user in the effective radiation direction of the second near interference base station at the same time as far as possible, and closes the sub-channel without the user needing service to reduce the network interference.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a resource allocation model for utilizing beamforming of directional antennas to mitigate interference in a cellular network according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
The present invention is implemented based on a resource allocation model using beam forming of directional antennas to mitigate interference of a cellular network as shown in fig. 1. for convenience of description, it is assumed that fig. 1 is a partial scene randomly selected from a super-dense network, base stations and users are randomly distributed in a two-dimensional space, all base stations reuse the same spectrum resources, and each base station provides NcA sub-channel orthogonal in the frequency domain, where s0，s1And s2Denotes a base station using a directional antenna, Ψ ∈ (0,2 π)]Representing the effective beam radiation angle, u, of the base station antenna0，u1And u2Representing cell users; the single solid line represents the desired signal, i.e. the beam aiming direction, the single dashed line represents the interfering signal, and the range bounded by the solid line represents the effective beam radiation angle of the directional antenna.
The invention discloses a resource allocation method for alleviating cellular network interference, which comprises the following steps:
s1: determining a beam aiming direction of a base station service user based on a better beam aiming scheme; the user is associated with the nearest base station, the nearest means that the Euclidean distance between the user and the base station is shortest, all the base stations carry out directional transmission on the user through beam forming, the effective coverage angle of the beam forming is psi, the user can be seriously interfered when being positioned in the effective beam radiation range of a second near base station, the user and the base stations are randomly distributed in a two-dimensional space, the network spectrum resource reuse factor is 1, and each base station has NcAvailable subchannels that are orthogonal in frequency domain; in a two-dimensional coordinate system with the base station as the center and the counterclockwise direction as the positive direction, the beam aiming direction of each base station serving the associated user is determined based on a better beam aiming scheme according to the space positions of the user and the base station
Figure BDA0003495018060000051
The better wave beam alignment scheme means that the base station adjusts waves in a self-adaptive mode according to the position of a communication user requesting communicationAiming direction of beam forming and aiming direction aiming at the user requesting communication, the constraint condition of effective coverage angle of beam forming is psi ∈ (0,2 π ∈)]The beam aiming direction is constrained by
Figure BDA0003495018060000052
All units are radians, u in FIG. 10Being the subscriber requesting the communication, target base station s0Upon receiving u0After a communication request, its antenna beam is aimed at a direction u0；
S2: determining an interference base station according to the beam aiming direction of a base station service user; obtaining the beam aiming directions of potential interference base stations at the same moment according to the position of the communication requesting user, and obtaining the effective beam radiation ranges of the potential interference base stations based on the effective beam forming coverage angle; the potential interference base stations comprise all other base stations except the target base station; considering that any cell has users needing service at any time, the beam aiming direction of the users served at the potential interference base station is determined according to the position of the users served at the potential interference base station of the users requesting communication at the same time
Figure BDA0003495018060000053
On both sides, the range of the angle between the two directions, in which the effective radiation angle Ψ of the antenna is reduced to one half, is the effective beam radiation range, specifically, when
Figure BDA0003495018060000054
Real-time effective beam radiation range is
Figure BDA0003495018060000061
As a central line, to
Figure BDA0003495018060000062
In order to be the lower boundary,
Figure BDA0003495018060000063
a range that is an upper boundary; when the temperature is higher than the set temperature
Figure BDA0003495018060000064
Real-time effective beam radiation range is
Figure BDA0003495018060000065
As a central line, to
Figure BDA0003495018060000066
Is the lower boundary of the flow path,
Figure BDA0003495018060000067
a range that is an upper boundary; otherwise, the real-time effective beam radiation range is
Figure BDA0003495018060000068
In order to be the lower boundary,
Figure BDA0003495018060000069
the upper bound of the range.
And calculating an included angle between the request communication user and the potential interference base station by taking the potential interference base station as a center, judging whether the request communication user is in an effective beam radiation range of the potential interference base station at the same moment according to the included angle between the request communication user and the potential interference base station, and determining the interference base station. The method specifically comprises the following steps: and determining an included angle theta epsilon (0,2 pi) between the communication requesting user and the potential interference base station according to the space positions of the communication requesting user and the potential interference base station by taking the potential interference base station as a center and taking the anticlockwise direction as positive]When the requesting communication subscriber is within the effective beam radiation range of its potentially interfering base station at the same time instant, i.e. when
Figure BDA00034950180600000610
Or
Figure BDA00034950180600000611
Or
Figure BDA00034950180600000612
Then, the potential interfering base station is determined to be an interfering base station; determining a second user for each user based on the Euclidean distance between the user and the base stationNear interfering base stations, in u0Time of communication request, its second near base station s2Is being u2Providing a service, and u0At its second near base station s2Is u2Within the effective antenna radiation range for providing the service, s is determined2Is requesting the communication user u0The second near interfering base station.
S3: and determining a channel allocation scheme according to the interference base station to relieve the user interference.
The channel allocation scheme comprises: at the same time, the user requesting communication can only occupy one sub-channel at most, each sub-channel can only provide service for one user requesting communication at most, and the distribution of the sub-channels follows the random distribution principle; with Ni,eIndicating the number of currently active subchannels of base station i,
Figure BDA00034950180600000613
indicating the real-time occupancy of subchannel j at base station i,
Figure BDA00034950180600000614
representing the real-time occupation situation of a sub-channel j on a second near-interference base station of the communication requesting user; in particular, the amount of the solvent to be used,
Figure BDA00034950180600000615
indicating that the sub-channel j is free,
Figure BDA00034950180600000616
beam pointing direction representing a second near-interfering base station serving user of said requesting communication user according to the same time instant
Figure BDA00034950180600000617
The sub-channel j of the second near-interference base station, although idle, cannot be allocated to this time
Figure BDA00034950180600000618
Or
Figure BDA00034950180600000619
Or
Figure BDA00034950180600000620
The user in the direction of the user,
Figure BDA00034950180600000621
indicating that subchannel j has been occupied by a user within its effective radiation range.
In step S3, the target base station S0Randomly selecting a free sub-channel BjTo be allocated to u0Before determining the allocation, the second near-interference base station s is judged2Whether a user within the effective radiation range of the antenna already occupies the same-frequency sub-channel BjIf B isjIn idle state, the sub-channel is marked as not being allocated to the second near-interference base station s at the moment2Unless s is greater than s0No other idle sub-channels can be allocated to u0Otherwise u0Will randomly select one other free sub-channel BjJudging again until a sub-channel meeting the requirement is found and then distributing the sub-channel to u0. The method comprises the following specific steps:
the target base station randomly selects one to satisfy
Figure BDA0003495018060000071
Idle subchannel BjThe beam aiming direction of the user served by the second near interference base station is distributed to the user requesting communication according to the same time
Figure BDA0003495018060000072
Effective beam radiation range of the second near base station
Figure BDA0003495018060000073
Or
Figure BDA0003495018060000074
Or
Figure BDA0003495018060000075
For internal useUser needs to avoid using sub-channel B as much as possiblejI.e. when requesting sub-channel B of the second near interfering base station of the communicating subscriberjAt idle, mark BjEffective radiation range that cannot be allocated to a second near-interfering base station at the same time
Figure BDA0003495018060000076
Or
Figure BDA0003495018060000077
Or
Figure BDA0003495018060000078
User in and target base station will subchannel BjTo the requesting communication user; if the sub-channel B of the second near-interference base station of the communication user is requestedjAre all already occupied, i.e.
Figure BDA0003495018060000079
Then the target base station needs to reselect other satisfaction
Figure BDA00034950180600000710
And as far as possible avoiding collision of the sub-channel selected by the requesting communication user with the sub-channel selected by the user in the effective radiation range of the second near-interference base station at the same time, unless the target base station has no other free sub-channel to allocate to the requesting communication user, i.e. Ni,e＝1，
Figure BDA00034950180600000711
Then, consider subchannel BjAnd allocating the sub-channels to the users requesting communication, and when all the users requesting communication in the cell are responded, the target base station closes the remaining unallocated effective sub-channels.
The invention utilizes the beam aiming direction and the channel allocation of the base station serving different users to relieve the interference in the directional ultra-dense cellular network, finds the second near-interference base station of the user before the channel allocation is carried out, and achieves the purposes that: and reducing or eliminating the same-frequency inter-cell interference of the second near-interference base station to the communication requesting user by reasonably allocating the channel.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims (9)

1. A resource allocation method for mitigating cellular network interference, characterized in that: the method comprises the following steps:
s1: determining a beam aiming direction of a base station serving user based on a beam aiming scheme;
s2: determining an interference base station according to the beam aiming direction of a base station service user;
s3: and determining a channel allocation scheme according to the interference base station to relieve the user interference.
2. The method of claim 1, wherein the method comprises: in step S1, the distance between the user and the base station is used for distance ordering, the user is associated with the nearest base station, all base stations perform directional transmission to the user by beamforming, the effective coverage angle of beamforming is Ψ, the user and the base station are randomly distributed in a two-dimensional space, the network spectrum resource multiplexing factor is 1, and each base station has NcAvailable subchannels that are orthogonal in frequency domain; determining the beam aiming direction of each base station serving its associated user based on a beam aiming scheme according to the spatial positions of the user and the base station in a two-dimensional coordinate system with the base station as the center and the counterclockwise direction as the positive
Figure FDA0003495018050000011
The beam alignment scheme refers to that a base station adaptively adjusts the aiming direction of beam forming according to the position of a communication user and aims at the communication user, and the beam is aligned with the communication userThe constraint condition of the shaped effective coverage angle is psi ∈ (0,2 π)]The beam aiming direction is constrained by
Figure FDA0003495018050000012
3. The method of claim 1, wherein the method comprises: the step S2 specifically includes the following steps:
s21: obtaining the beam aiming direction of the potential interference base station at the same moment according to the position of the communication requesting user, and obtaining the effective beam radiation range of the potential interference base station based on the beam forming effective coverage angle;
s22: calculating an included angle between the communication requesting user and the potential interference base station by taking the potential interference base station as a center;
s23: and judging whether the communication requesting user is in the effective beam radiation range of the potential interference base station at the same moment according to the included angle between the communication requesting user and the potential interference base station, and determining the interference base station.
4. The method of claim 3, wherein the method comprises: the step S21 specifically includes: the potential interference base stations comprise all other base stations except the target base station; at the same time, according to the position of the potential interference base station service user of the communication request user, aiming the beam of the potential interference base station service user
Figure FDA0003495018050000013
On both sides, the range of the angle between the two directions, in which the effective radiation angle Ψ of the antenna is reduced to one half, is the effective beam radiation range, specifically, when
Figure FDA0003495018050000014
Real-time effective beam radiation range is
Figure FDA0003495018050000015
As a central line, to
Figure FDA0003495018050000016
In order to be the lower boundary,
Figure FDA0003495018050000017
a range that is an upper boundary; when in use
Figure FDA0003495018050000018
Real-time effective beam radiation range is
Figure FDA0003495018050000019
As a central line, to
Figure FDA00034950180500000110
In order to be the lower boundary,
Figure FDA00034950180500000111
a range that is an upper boundary; otherwise, the real-time effective beam radiation range is
Figure FDA00034950180500000112
In order to be the lower boundary,
Figure FDA00034950180500000113
is the range of the upper bound.
5. The method of claim 3, wherein the method comprises: the step S22 specifically includes: and determining an included angle theta epsilon (0,2 pi) between the request communication user and the potential interference base station according to the space positions of the request communication user and the potential interference base station by taking the potential interference base station as a center and taking the anticlockwise direction as positive.
6. The method of claim 3, wherein the resource allocation is for mitigating interference in a cellular network: the step S23 specifically includes: when the requesting communication subscriber is within the effective beam radiation range of its potentially interfering base station at the same time, i.e. when
Figure FDA0003495018050000021
Or
Figure FDA0003495018050000022
Or
Figure FDA0003495018050000023
Then, the potential interfering base station is determined to be an interfering base station; and determining a second near interference base station of each user according to the Euclidean distance between the user and the interference base station.
7. The method of claim 1, wherein the method comprises: the channel allocation scheme in step S3 is: at the same time, the communication requesting user can only occupy one sub-channel at most, each sub-channel can only provide service for one communication requesting user at most, and the distribution of the sub-channels follows the random distribution principle; with Ni,eIndicating the number of currently active subchannels of base station i,
Figure FDA0003495018050000024
indicating the real-time occupancy of subchannel j at base station i,
Figure FDA0003495018050000025
representing the real-time occupation situation of a sub-channel j on a second near-interference base station of the communication requesting user;
Figure FDA0003495018050000026
indicating that the sub-channel j is free,
Figure FDA0003495018050000027
beam-sighting party representing a second near-interfering base station serving user with respect to said requesting communication user at the same timeTo the direction of
Figure FDA0003495018050000028
The sub-channel j of the second near-interference base station, although idle, cannot be allocated to this time
Figure FDA0003495018050000029
Or
Figure FDA00034950180500000210
Or
Figure FDA00034950180500000211
The user in the direction of the user,
Figure FDA00034950180500000212
indicating that subchannel j has been occupied by a user within its effective radiation range.
8. The method of claim 7, wherein the method further comprises: the step S3 includes: the target base station randomly selects an idle sub-channel BjBefore determining allocation, it is judged whether the user in the effective radiation range of the antenna of the second near interference base station occupies the same frequency sub-channel BjIf B isjIn idle state, marking that the sub-channel can not be allocated to the user in the effective radiation range of the antenna of the second near interference base station, unless the target base station has no other idle sub-channel to be allocated to the requesting communication user, the requesting communication user randomly selects one other idle sub-channel BjThe decision is again made until a satisfactory subchannel is found and allocated to the requesting communication subscriber.
9. The method of claim 8, wherein the method further comprises: the step S3 specifically includes the following steps: the target base station randomly selects one to satisfy
Figure FDA00034950180500000213
Idle subchannel BjThe beam aiming direction of the interference base station service user which is distributed to the request communication user and is second near to the request communication user at the same time
Figure FDA00034950180500000214
Effective beam radiation range of second near-interference base station
Figure FDA00034950180500000215
Or
Figure FDA0003495018050000031
Or
Figure FDA0003495018050000032
The inner user is to avoid using sub-channel BjWhen a sub-channel B of a second near-interference base station of a communication user is requestedjAt idle, mark BjEffective radiation range that cannot be allocated to a second near-interfering base station at the same time
Figure FDA0003495018050000033
Or
Figure FDA0003495018050000034
Or
Figure FDA0003495018050000035
User in the target base station, and the target base station will sub-channel BjTo the requesting communication user;
if the sub-channel B of the second near-interference base station of the communication requesting userjAre all already occupied, i.e.
Figure FDA0003495018050000036
Then the target base station reselects other satisfaction
Figure FDA0003495018050000037
And avoiding collision of the sub-channel selected by the requesting communication user with the sub-channel selected by the user in the effective radiation range of the second near-interference base station at the same time unless the target base station has no other free sub-channel to allocate to the requesting communication user, namely Ni,e＝1，
Figure FDA0003495018050000038
Then, consider subchannel BjAnd allocating the sub-channels to the communication requesting users, and when all the communication requesting users are responded, the target base station closes the remaining unallocated effective sub-channels.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660631B1 (en) * 1993-12-27 2002-08-28 Nec Corporation Channel allocation method for communication systems, as well as corresponding base station and communication system
JP2008011578A (en) * 2007-09-27 2008-01-17 Kyocera Corp Mobile station, communication control method
US20090245085A1 (en) * 2008-03-27 2009-10-01 Zhifeng Tao Graph-Based Method for Allocating Resources in OFDMA Networks
CN103327495A (en) * 2013-06-04 2013-09-25 北京邮电大学 Dynamic spectrum distribution method based on multi-base-station combined treatment
CN108235440A (en) * 2018-03-20 2018-06-29 山东大学 Frequency spectrum resource allocation method and system based on interference threshold in Femtocell networks
KR20190025518A (en) * 2017-09-01 2019-03-11 주식회사 케이티 System and method for beam transmission power adjustment for inter-cell interference control
KR20190103909A (en) * 2018-02-28 2019-09-05 연세대학교 산학협력단 Method and system for setting cell coverage based on blockage-aware
KR102072307B1 (en) * 2018-09-21 2020-04-02 동국대학교 산학협력단 Communication method and apparatus for ultra reliable and low latency communication
CN112616180A (en) * 2020-12-16 2021-04-06 重庆邮电大学 Distributed joint resource allocation method for coordinating 5G ultra-dense network interference

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660631B1 (en) * 1993-12-27 2002-08-28 Nec Corporation Channel allocation method for communication systems, as well as corresponding base station and communication system
JP2008011578A (en) * 2007-09-27 2008-01-17 Kyocera Corp Mobile station, communication control method
US20090245085A1 (en) * 2008-03-27 2009-10-01 Zhifeng Tao Graph-Based Method for Allocating Resources in OFDMA Networks
CN103327495A (en) * 2013-06-04 2013-09-25 北京邮电大学 Dynamic spectrum distribution method based on multi-base-station combined treatment
KR20190025518A (en) * 2017-09-01 2019-03-11 주식회사 케이티 System and method for beam transmission power adjustment for inter-cell interference control
KR20190103909A (en) * 2018-02-28 2019-09-05 연세대학교 산학협력단 Method and system for setting cell coverage based on blockage-aware
CN108235440A (en) * 2018-03-20 2018-06-29 山东大学 Frequency spectrum resource allocation method and system based on interference threshold in Femtocell networks
KR102072307B1 (en) * 2018-09-21 2020-04-02 동국대학교 산학협력단 Communication method and apparatus for ultra reliable and low latency communication
CN112616180A (en) * 2020-12-16 2021-04-06 重庆邮电大学 Distributed joint resource allocation method for coordinating 5G ultra-dense network interference

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
NOKIA SIEMENS NETWORKS: "RP-080592 "RF system scenarios TR 36.942v2.0.0"", 3GPP TSG_RAN\\TSG_RAN, no. 41, 3 September 2008 (2008-09-03) *
Q. LIU: "An Analysis of Distributed Joint Spectrum Resource Allocation With Power Control in Ultra-Dense Cellular Networks", 《IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY》, 11 July 2022 (2022-07-11) *
Y. WANG: "Interference Coordination for Autonomous Small Cell Networks Based on Distributed Learning", 《ICC 2020 - 2020 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC)》, 27 July 2020 (2020-07-27) *
姚稳: "超密集网络中基于分簇的干扰管理方案", 《科学技术与工程》, 15 March 2018 (2018-03-15) *
李国强: "5G室内外同频组网干扰抑制方案探讨", 《山东通信技术》, 15 September 2020 (2020-09-15) *
郭荣新;袁继昌;: "多蜂窝MISO通信系统中干扰消除策略研究", 江西师范大学学报(自然科学版), no. 01, 15 January 2013 (2013-01-15) *

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