CN113727443A - Method and device for distributing frequencies among base stations in cluster system and base stations - Google Patents
Method and device for distributing frequencies among base stations in cluster system and base stations Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
Abstract
The application provides a method, a device and a base station for frequency allocation among base stations in a cluster system, which are applied to a target base station in the cluster system, and the method comprises the following steps: judging whether frequencies without co-channel interference risks with other base stations exist in the available frequencies of the target base station; if the frequency exists, selecting a frequency without co-channel interference risk with other base stations from available frequencies of the target base station as a frequency to be used of the target base station; if not, judging whether unused frequencies of other base stations exist in the frequencies with the same frequency interference risks with other base stations in the available frequencies of the target base station; and if the frequency exists, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station. In the application, the probability of the occurrence of co-channel interference can be reduced through the above mode.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for allocating frequencies between base stations in a trunking system, and a base station.
Background
Along with the increasing demand of users on wireless data services, the spectrum resources are increasingly tense due to recent expansion, and under the circumstance, the problem of low spectrum reuse efficiency caused by a fixed division static spectrum allocation mode is increasingly prominent, so that the same frequency interference in the system is further caused.
To solve this problem, an interference detection technique or a dynamic frequency allocation technique may be employed. However, the interference detection technology can only detect uplink co-channel interference at present, and only perform alarm based on the detection result without performing other processing, so that the co-channel interference cannot be reliably reduced by adopting the interference detection technology. The dynamic frequency allocation technique needs to adopt a broadband combiner, which is complex to implement, and the adoption of the broadband combiner can increase insertion loss and reduce the coverage area of the base station.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present application provide a method, an apparatus, and a base station for frequency allocation between base stations in a cluster system, so as to achieve the purpose of reducing the probability of occurrence of co-channel interference, and the technical scheme is as follows:
a method for distributing frequency among base stations in a cluster system is applied to a target base station in the cluster system, wherein the target base station is any one base station in the cluster system, and the method comprises the following steps:
judging whether frequencies without co-channel interference risks with other base stations exist in the available frequencies of the target base station;
if the frequency exists, selecting a frequency without co-channel interference risk with other base stations from available frequencies of the target base station as a frequency to be used of the target base station;
if not, judging whether unused frequencies of other base stations exist in the frequencies with the same frequency interference risks with other base stations in the available frequencies of the target base station;
if the frequency exists, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station.
Preferably, the determining whether there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station includes:
judging whether frequencies which are not multiplexed by other base stations exist in the available frequencies of the target base station or not according to a frequency multiplexing table, wherein the frequency multiplexing table records the distribution situation of the available frequencies of each base station in the trunking system;
if yes, the frequency without co-channel interference risk with other base stations includes:
frequencies not reused by other base stations.
Preferably, after determining whether there is a frequency that is not reused by another base station in the available frequencies of the target base station according to the frequency reuse table, the method further includes:
if the available frequency of the target base station does not have a frequency which is not reused by other base stations, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result;
judging whether a frequency without co-channel interference risk with other base stations exists in available frequencies of the target base station which are reused by other base stations or not according to the frequency reuse table and the interference risk evaluation result;
if the frequency exists, the frequency without co-channel interference risk with other base stations comprises the following steps:
and selecting the frequency without the co-channel interference risk with other base stations from the frequencies reused by other base stations.
Preferably, the determining whether there is a frequency unused by another base station in a frequency having a co-channel interference risk with another base station in the available frequencies of the target base station includes:
acquiring the frequency use states of other base stations except the target base station in the cluster system;
and judging whether the frequencies which are not used by other base stations exist in the frequencies which have the same frequency interference risks with other base stations in the available frequencies of the target base station according to the frequency use states of other base stations.
Preferably, the determining whether there is a frequency unused by another base station in a frequency having a co-channel interference risk with another base station in the available frequencies of the target base station includes:
acquiring the frequency use state of a base station which has co-frequency interference risk with the target base station in the cluster system;
and judging whether frequencies which are not used by other base stations exist in the available frequencies of the target base station and the frequencies which are at the same frequency interference risk with other base stations or not according to the frequency use state of the base station which is at the same frequency interference risk with the target base station in the cluster system.
A frequency allocation device among base stations in a trunking system is applied to a target base station in the trunking system, wherein the target base station is any one base station in the trunking system, and the device comprises:
the first judging module is used for judging whether frequencies without co-frequency interference risks with other base stations exist in the available frequencies of the target base station;
a first selecting module, configured to select, from available frequencies of the target base station, a frequency without co-channel interference risk with other base stations as a to-be-used frequency of the target base station if there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station;
a second judging module, configured to judge whether there is a frequency unused by another base station in a frequency having a risk of co-channel interference with another base station in the available frequency of the target base station if there is no frequency having a risk of co-channel interference with another base station in the available frequency of the target base station;
and a second selection module, configured to select, if there are frequencies that are not used by other base stations in frequencies that are at risk of co-channel interference with other base stations in available frequencies of the target base station, frequencies that are not used by other base stations from the frequencies that are at risk of co-channel interference with other base stations, as the to-be-used frequencies of the target base station.
Preferably, the first determining module is specifically configured to: judging whether frequencies which are not multiplexed by other base stations exist in the available frequencies of the target base station or not according to a frequency multiplexing table, wherein the frequency multiplexing table records the distribution situation of the available frequencies of each base station in the trunking system;
and if the available frequencies of the target base station exist frequencies which are not multiplexed by other base stations, triggering the first selection module to select the frequencies which are not multiplexed by other base stations from the available frequencies of the target base station as the frequencies to be used of the target base station.
Preferably, the first determining module is specifically configured to:
judging whether frequencies which are not multiplexed by other base stations exist in the available frequencies of the target base station or not according to a frequency multiplexing table, wherein the frequency multiplexing table records the distribution situation of the available frequencies of each base station in the trunking system;
if the available frequency of the target base station has a frequency which is not multiplexed by other base stations, triggering the first selection module to select the frequency which is not multiplexed by other base stations from the available frequency of the target base station as the frequency to be used of the target base station;
if the available frequency of the target base station does not have a frequency which is not reused by other base stations, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result;
judging whether a frequency without co-channel interference risk with other base stations exists in available frequencies of the target base station which are reused by other base stations or not according to the frequency reuse table and the interference risk evaluation result;
if there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station multiplexed by other base stations, triggering the first selection module to select a frequency without co-channel interference risk with other base stations from the frequencies multiplexed by other base stations as the to-be-used frequency of the target base station.
Preferably, the second determining module is specifically configured to:
acquiring the frequency use states of other base stations except the target base station in the cluster system;
judging whether unused frequencies of other base stations exist in the frequencies with the risk of co-channel interference between the available frequencies of the target base station and other base stations according to the frequency use states of other base stations;
or, the second determining module is specifically configured to:
acquiring the frequency use state of a base station which has co-frequency interference risk with the target base station in the cluster system;
and judging whether frequencies which are not used by other base stations exist in the available frequencies of the target base station and the frequencies which are at the same frequency interference risk with other base stations or not according to the frequency use state of the base station which is at the same frequency interference risk with the target base station in the cluster system.
A base station, comprising: a memory for storing a program and a processor;
the processor, when executing the program, implements a method of frequency allocation between base stations in a cluster system as described in any one of the above.
A computer-readable storage medium, having stored thereon computer-executable instructions, which, when loaded and executed by a processor, implement a method for frequency allocation between base stations in a cluster system as described in any one of the above.
Compared with the prior art, the beneficial effect of this application is:
in the method, a target base station in a cluster communication system firstly judges whether frequencies without co-channel interference risks with other base stations exist in available frequencies of the target base station, if so, the frequencies without co-channel interference risks with other base stations are selected from the available frequencies of the target base station, so that the target base station and other base stations are prevented from using the frequencies with co-channel interference risks, and the probability of co-channel interference is reduced; if the available frequency of the target base station does not have a frequency without co-channel interference risk with other base stations, judging whether the frequency which is not used by other base stations exists in the frequency which is not used by other base stations in the available frequency of the target base station and is at co-channel interference risk with other base stations, if so, selecting the frequency which is not used by other base stations from the frequency which is not used by other base stations in the available frequency of the target base station and is at co-channel interference risk with other base stations, avoiding using the frequency which is used by other base stations and is at co-channel interference risk in the same time period, and also reducing the probability of co-channel interference (such as uplink co-channel interference or downlink co-channel interference) occurrence. And idle frequency resources in the cluster system are fully utilized, interference is avoided, and reliability is improved. In addition, the mode of reducing the occurrence of co-channel interference is easier to realize without additionally adding equipment, can also avoid the problem of reducing the coverage area of the base station caused by additionally adding equipment, and has higher reliability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart of an embodiment 1 of a method for allocating frequencies among base stations in a cluster system according to the present application;
fig. 2 is a flowchart of an embodiment 2 of a method for allocating frequencies among base stations in a cluster system according to the present application;
fig. 3 is a flowchart of an embodiment 3 of a method for allocating frequencies among base stations in a cluster system according to the present application;
fig. 4 is a flowchart of an embodiment 4 of a method for allocating frequencies between base stations in a trunking system provided in the present application;
fig. 5 is a flowchart of an embodiment 5 of a method for allocating frequencies between base stations in a cluster system according to the present application;
fig. 6 is a schematic logical structure diagram of a frequency allocation apparatus between base stations in a trunking system according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the research process of how to reduce co-channel interference between base stations in a private network trunking communication system, the applicant finds that the frequency utilization rate in the private network trunking communication system is not high (for example, one part of frequency is frequently utilized, and the other part of frequency is rarely utilized or not utilized) through a large amount of telephone traffic data analysis work.
Next, a method for allocating frequencies among base stations in a trunking system disclosed in an embodiment of the present application is introduced, where the method is applied to a target base station in the trunking system, and the target base station does not include any base station in the trunking system, as shown in fig. 1, and is a flowchart of an embodiment 1 of a method for allocating frequencies among base stations in a trunking system provided by the present application, where the method includes the following steps:
and step S11, judging whether there is a frequency without co-channel interference risk with other base stations in the available frequency of the target base station.
If yes, go to step S12; if not, go to step S13.
In this embodiment, whether there is a risk of co-channel interference between base stations may be determined by comparing frequencies used between different base stations. For example, if two base stations use the same frequency in an overlapping coverage area, it can be determined that the two base stations have the risk of co-channel interference; if two base stations use the same frequency, but the two base stations do not have overlapping coverage areas, it can be determined that the two base stations do not have the risk of co-channel interference.
Preferably, frequencies having no co-channel interference risk with other base stations may be set to have higher priority than other frequencies, and the high priority frequencies are preferentially allocated to the target base station. Therefore, in this embodiment, the target base station first determines whether there is a frequency that does not have the risk of co-channel interference with other base stations in the available frequencies of the target base station.
It should be noted that the available frequency of the target base station is pre-allocated by the trunking system, and the available frequency may be understood as: available frequencies, however, the available frequencies are not necessarily used in their entirety.
Of course, each base station in the cluster system except the target base station has its own available frequency.
And step S12, selecting a frequency without co-channel interference risk with other base stations from the available frequencies of the target base station as the frequency to be used of the target base station.
And selecting the frequency without co-channel interference risk with other base stations from the available frequencies of the target base station as the frequency to be used of the target base station, so that the target base station and other base stations can be prevented from using the frequency with co-channel interference risk.
Step S13, determine whether there is a frequency unused by another base station in the available frequency of the target base station and the frequency having co-channel interference risk with another base station.
If so, go to step S14.
In this embodiment, the priority of the frequency that will have the co-channel interference risk but is not used by other base stations is set to be lower than the priority of the frequency that does not have the co-channel interference risk, and on the basis that it is determined in step S11 that there is no frequency that does not have the co-channel interference risk with other base stations in the available frequency of the target base station, there may be a frequency that has the co-channel interference risk with other base stations in the available frequency of the target base station, so it is determined whether there is a frequency that is not used by other base stations in the frequencies that have the co-channel interference risk with other base stations in the available frequency of the target base station.
And step S14, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station.
And selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations, so that the frequency which is used by other base stations and has the same frequency interference risk can be prevented from being used in the same time period.
In the method, a target base station in a cluster system firstly judges whether frequencies without co-channel interference risks with other base stations exist in available frequencies of the target base station, if so, the frequencies without co-channel interference risks with other base stations are selected from the available frequencies of the target base station, so that the target base station and other base stations are prevented from using the frequencies with co-channel interference risks, and the probability of co-channel interference is reduced; if the available frequency of the target base station does not have the frequency without the risk of co-channel interference with other base stations, judging whether the frequency which is not used by other base stations exists in the frequency which is not used by other base stations and has the risk of co-channel interference with other base stations in the available frequency of the target base station, if so, selecting the frequency which is not used by other base stations from the frequency which is not used by other base stations and has the risk of co-channel interference with other base stations in the available frequency of the target base station, avoiding using the frequency which is used by other base stations and has the risk of co-channel interference in the same time period, and also reducing the probability of co-channel interference. The mode of reducing the occurrence of same frequency interference is easier to realize and has higher reliability.
As another optional embodiment of the present application, referring to fig. 2, a schematic flow chart of an embodiment 2 of a method for controlling frequency allocation between base stations in a cluster system provided by the present application is provided, where this embodiment mainly relates to a refinement scheme of the method for frequency allocation between base stations in a cluster system described in the foregoing embodiment 1, and as shown in fig. 2, the method may include, but is not limited to, the following steps:
step S21, determining whether there is a frequency that is not multiplexed by other base stations in the available frequencies of the target base station according to the frequency multiplexing table.
The frequency reuse table describes the distribution of available frequencies of each base station in the trunking system. The same frequency may exist in the available frequencies of the base stations described in the frequency reuse table, and the same frequency between different base stations can be understood as a frequency to be reused. For example, in the frequency reuse table, the available frequencies of the base station a are respectively a1, a2 and B1, the available frequencies of the base station B are respectively B1, B2 and a1, the available frequencies of the base station C are respectively B1, C1 and C2, then a1 is the frequency multiplexed by the base station a and the base station B, and B1 is the frequency multiplexed by the base stations A, B and C.
Since the frequency reuse table describes the distribution of the available frequencies of each base station in the trunking system, it is possible to determine whether there is a frequency that is not reused by other base stations in the available frequencies of the target base station by comparing the available frequencies of each base station described in the frequency reuse table.
In this embodiment, since the frequency not multiplexed by other base stations does not interfere with other base stations in the same frequency, the priority of the frequency not multiplexed by other base stations may be set to be the highest, and when allocating a frequency to a target base station, the frequency not multiplexed by other base stations is preferentially selected. Based on this, it is first determined whether there is a frequency that is not reused by other base stations among the available frequencies of the target base station.
If yes, go to step S22; if not, go to step S23.
Step S21 is a specific implementation manner of step S11 in example 1.
Step S22, selecting a frequency that is not reused by other base stations from the available frequencies of the target base station as the frequency to be used by the target base station.
And selecting the frequency which is not multiplexed by other base stations from the available frequencies of the target base station as the frequency to be used of the target base station, so that the frequency to be used of the target base station is different from the frequencies of other base stations, and the occurrence of co-channel interference is avoided.
Step S22 is a specific implementation manner of step S12 in example 1.
Step S23, determine whether there is a frequency unused by another base station in the available frequency of the target base station and the frequency having co-channel interference risk with another base station.
If so, go to step S24.
And step S24, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station.
The detailed procedures of steps S23-S24 can be found in the related descriptions of steps S13-S14 in embodiment 1, and are not repeated herein.
As another optional embodiment of the present application, referring to fig. 3, a schematic flow chart of embodiment 3 of a method for controlling frequency allocation between base stations in a cluster system provided by the present application is provided, where this embodiment mainly is an extension scheme of the method for frequency allocation between base stations in a cluster system described in the foregoing embodiment 2, and as shown in fig. 3, the method may include, but is not limited to, the following steps:
step S31, determining whether there is a frequency that is not multiplexed by other base stations in the available frequencies of the target base station according to the frequency multiplexing table.
The frequency reuse table describes the distribution of available frequencies of each base station in the trunking system.
If yes, go to step S32; if not, go to step S33.
Step S32, selecting a frequency that is not reused by other base stations from the available frequencies of the target base station as the frequency to be used by the target base station.
The detailed procedures of steps S31-S32 can be referred to the related descriptions of steps S21-S22 in embodiment 2, and are not described herein again.
And step S33, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result.
In this embodiment, the co-channel interference risk between the base stations may be pre-evaluated by using information such as a wireless propagation model and drive test data, and the evaluation result may represent whether the co-channel interference risk exists in the frequency used between the base stations.
And step S34, judging whether there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station which are reused by other base stations according to the frequency reuse table and the interference risk assessment result.
The frequency multiplexed by other base stations in the available frequency of the target base station can be determined according to the frequency multiplexing table, and on the basis, the interference risk assessment result can represent whether the frequency used between the base stations has the co-channel interference risk, so that the available frequency multiplexed by other base stations of the target base station can be determined according to the interference risk assessment result, whether the co-channel interference risk exists, and whether the frequency without the co-channel interference risk with other base stations exists in the available frequency multiplexed by other base stations of the target base station is judged.
According to the interference risk evaluation result, whether a frequency without co-channel interference risk with other base stations exists in the frequencies which are reused by other base stations in the available frequencies of the target base station or not can be judged.
If yes, go to step S35; if not, go to step S36.
And step S35, selecting a frequency without co-channel interference risk with other base stations from the frequencies reused by other base stations as the frequency to be used of the target base station.
Although there is no frequency not reused by other base stations in the available frequencies of the target base station, the frequency can be selected from the frequencies reused by other base stations and the frequencies without co-channel interference risk with other base stations, and the frequency used by the target base station is also different from the frequencies used by other base stations, so that co-channel interference is avoided.
Step S36, determine whether there is a frequency unused by another base station in the available frequency of the target base station and the frequency having co-channel interference risk with another base station.
If so, go to step S37.
And step S37, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station.
The detailed procedures of steps S36-S37 can be referred to the related descriptions of steps S13-S14 in embodiment 1, and are not described herein again.
As another optional embodiment of the present application, referring to fig. 4, a schematic flow chart of an embodiment 4 of a method for controlling frequency allocation between base stations in a cluster system provided by the present application is provided, where this embodiment mainly relates to a refinement scheme of the method for frequency allocation between base stations in a cluster system described in the foregoing embodiment 3, and as shown in fig. 4, the method may include, but is not limited to, the following steps:
step S41, determining whether there is a frequency that is not multiplexed by other base stations in the available frequencies of the target base station according to the frequency multiplexing table.
The frequency reuse table describes the distribution of available frequencies of each base station in the trunking system.
If yes, go to step S42; if not, go to step S43.
Step S42, selecting a frequency that is not reused by other base stations from the available frequencies of the target base station as the frequency to be used by the target base station.
And step S43, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result.
And step S44, judging whether there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station which are reused by other base stations according to the frequency reuse table and the interference risk assessment result.
If yes, go to step S45; if not, go to step S46.
And step S45, selecting a frequency without co-channel interference risk with other base stations from the frequencies reused by other base stations as the frequency to be used of the target base station.
The detailed procedures of steps S41-S45 can be referred to the related descriptions of steps S31-S35 in embodiment 3, and are not described herein again.
And step S46, acquiring the frequency use states of other base stations except the target base station in the cluster system.
In this embodiment, each base station in the trunking system may report the frequency usage state to the frequency allocation controller, and the target base station may obtain the frequency usage state of each base station except the target base station in the trunking system from the frequency allocation controller.
The frequency usage status can be understood as: the use state of the frequency in the frequency can be used, namely the use state and the non-use state.
Step S47, according to the frequency usage status of each other base station, determining whether there is a frequency unused by another base station in the available frequency of the target base station and the frequency having co-channel interference risk with another base station.
Since the frequency use state records the use state or the unused state of the frequency in the available frequency, whether the frequency unused by other base stations exists in the frequency having the risk of co-channel interference with other base stations in the available frequency of the target base station can be judged according to the frequency use states of other base stations.
If so, go to step S48.
Steps S46-S47 are a specific implementation of step S36 in example 3.
And step S48, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station.
After the determination of the frequency to be used of the target base station, the target base station may synchronize the frequency use status to the frequency allocation controller so as to ensure real-time of the frequency use status of each base station recorded in the frequency allocation controller.
The detailed process of step S48 can be referred to the related description of step S37 in embodiment 3, and is not repeated here.
As another optional embodiment of the present application, referring to fig. 5, a schematic flow chart of an embodiment 5 of a method for controlling frequency allocation between base stations in a cluster system provided by the present application is provided, where this embodiment mainly relates to a refinement scheme of the method for frequency allocation between base stations in a cluster system described in the foregoing embodiment 3, and as shown in fig. 5, the method may include, but is not limited to, the following steps:
step S51, determining whether there is a frequency that is not multiplexed by other base stations in the available frequencies of the target base station according to the frequency multiplexing table.
The frequency reuse table describes the distribution of available frequencies of each base station in the trunking system.
If yes, go to step S52; if not, go to step S53.
Step S52, selecting a frequency that is not reused by other base stations from the available frequencies of the target base station as the frequency to be used by the target base station.
And step S53, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result.
And step S54, judging whether there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station which are reused by other base stations according to the frequency reuse table and the interference risk assessment result.
If yes, go to step S55; if not, go to step S56.
And step S55, selecting a frequency without co-channel interference risk with other base stations from the frequencies reused by other base stations as the frequency to be used of the target base station.
The detailed procedures of steps S51-S55 can be referred to the related descriptions of steps S31-S35 in embodiment 3, and are not described herein again.
And step S56, acquiring the frequency use state of the base station which has the co-channel interference risk with the target base station in the cluster system.
In this embodiment, the frequency usage status of the base station in the trunking system, which has the risk of co-channel interference with the target base station, is obtained, and compared with the frequency usage status of each base station in the trunking system, workload can be reduced.
Step S57, according to the frequency usage status of the base station in the trunking system that has the co-channel interference risk with the target base station, determining whether there is a frequency that is not used by another base station in the available frequency of the target base station and the frequency that has the co-channel interference risk with another base station.
If so, go to step S58.
According to the frequency use state of the base station with the co-channel interference risk with the target base station in the cluster system, whether the frequency which is not used by other base stations exists in the available frequency of the target base station with the co-channel interference risk with other base stations can be judged more directly.
And step S58, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station.
The detailed process of step S58 can be referred to the related description of step S37 in embodiment 3, and is not repeated here.
After the determination of the frequency to be used of the target base station, the target base station may synchronize the frequency use status to the frequency allocation controller so as to ensure real-time of the frequency use status of each base station recorded in the frequency allocation controller.
Next, a frequency allocation device between base stations in a trunking system provided in the present application is described, and the frequency allocation device between base stations in a trunking system described below and the frequency allocation method between base stations in a trunking system described above may be referred to correspondingly.
Referring to fig. 6, the apparatus for allocating frequency among base stations in a trunking system is applied to a target base station in the trunking system, where the target base station is any one of the base stations in the trunking system, and the apparatus for allocating frequency among base stations in the trunking system includes: the device comprises a first judgment module 11, a first selection module 12, a second judgment module 13 and a second selection module 14.
A first judging module 11, configured to judge whether there is a frequency with no risk of co-channel interference with other base stations in available frequencies of the target base station;
a first selecting module 12, configured to select, from available frequencies of the target base station, a frequency without co-channel interference risk with other base stations as a to-be-used frequency of the target base station if there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station;
a second determining module 13, configured to determine whether there is a frequency unused by another base station in a frequency having a risk of co-channel interference with another base station in the available frequency of the target base station if there is no frequency having no risk of co-channel interference with another base station in the available frequency of the target base station;
a second selecting module 14, configured to select, if there are unused frequencies of other base stations in the frequencies at risk of co-channel interference with other base stations in the available frequencies of the target base station, an unused frequency of another base station from the frequencies at risk of co-channel interference with other base stations, as the to-be-used frequency of the target base station.
In this embodiment, the first determining module 11 may be specifically configured to: judging whether frequencies which are not multiplexed by other base stations exist in the available frequencies of the target base station or not according to a frequency multiplexing table, wherein the frequency multiplexing table records the distribution situation of the available frequencies of each base station in the trunking system;
if there is a frequency that is not reused by other base stations in the available frequencies of the target base station, the first selection module 12 is triggered to select a frequency that is not reused by other base stations from the available frequencies of the target base station as the frequency to be used by the target base station.
In this embodiment, the first determining module 11 may be specifically configured to:
judging whether frequencies which are not multiplexed by other base stations exist in the available frequencies of the target base station or not according to a frequency multiplexing table, wherein the frequency multiplexing table records the distribution situation of the available frequencies of each base station in the trunking system;
if there is a frequency that is not reused by other base stations in the available frequencies of the target base station, triggering the first selection module 12 to select a frequency that is not reused by other base stations from the available frequencies of the target base station as a frequency to be used by the target base station;
if the available frequency of the target base station does not have a frequency which is not reused by other base stations, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result;
judging whether a frequency without co-channel interference risk with other base stations exists in available frequencies of the target base station which are reused by other base stations or not according to the frequency reuse table and the interference risk evaluation result;
if there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station multiplexed by other base stations, the first selection module 12 is triggered to select a frequency without co-channel interference risk with other base stations from the frequencies multiplexed by other base stations as the to-be-used frequency of the target base station.
In this embodiment, the second determining module 13 may be specifically configured to:
acquiring the frequency use states of other base stations except the target base station in the cluster system;
and judging whether the frequencies which are not used by other base stations exist in the frequencies which have the same frequency interference risks with other base stations in the available frequencies of the target base station according to the frequency use states of other base stations.
In this embodiment, the second determining module 13 may be specifically configured to:
acquiring the frequency use state of a base station which has co-frequency interference risk with the target base station in the cluster system;
and judging whether frequencies which are not used by other base stations exist in the available frequencies of the target base station and the frequencies which are at the same frequency interference risk with other base stations or not according to the frequency use state of the base station which is at the same frequency interference risk with the target base station in the cluster system.
In another embodiment of the present application, there is provided a base station including: a memory for storing a program and a processor;
the processor, when executing the program, implements the method for frequency allocation between base stations in a cluster system as described in any one of the method embodiments of embodiments 1-5 above.
In another embodiment of the present application, a computer-readable storage medium is provided, where computer-executable instructions are stored in the computer-readable storage medium, and when being loaded and executed by a processor, the computer-executable instructions implement a method for frequency allocation between base stations in a cluster system as described in any one of the method embodiments 1 to 5 above.
It should be noted that each embodiment is mainly described as a difference from the other embodiments, and the same and similar parts between the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The above detailed description is made on a method, an apparatus, and a base station for frequency allocation between base stations in a trunking system, which are provided by the present application, and a specific example is applied in the present application to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A method for allocating frequencies among base stations in a trunking system is applied to a target base station in the trunking system, wherein the target base station is any one base station in the trunking system, and the method comprises the following steps:
judging whether frequencies without co-channel interference risks with other base stations exist in the available frequencies of the target base station;
if the frequency exists, selecting a frequency without co-channel interference risk with other base stations from available frequencies of the target base station as a frequency to be used of the target base station;
if not, judging whether unused frequencies of other base stations exist in the frequencies with the same frequency interference risks with other base stations in the available frequencies of the target base station;
if the frequency exists, selecting the frequency which is not used by other base stations from the frequencies which have the same frequency interference risk with other base stations as the frequency to be used of the target base station.
2. The method of claim 1, wherein determining whether there are frequencies with no co-channel interference risk with other base stations in the available frequencies of the target base station comprises:
judging whether frequencies which are not multiplexed by other base stations exist in the available frequencies of the target base station or not according to a frequency multiplexing table, wherein the frequency multiplexing table records the distribution situation of the available frequencies of each base station in the trunking system;
if yes, the frequency without co-channel interference risk with other base stations includes:
frequencies not reused by other base stations.
3. The method of claim 2, wherein after determining whether there is a frequency that is not reused by other base stations in the available frequencies of the target base station according to the frequency reuse table, the method further comprises:
if the available frequency of the target base station does not have a frequency which is not reused by other base stations, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result;
judging whether a frequency without co-channel interference risk with other base stations exists in available frequencies of the target base station which are reused by other base stations or not according to the frequency reuse table and the interference risk evaluation result;
if the frequency exists, the frequency without co-channel interference risk with other base stations comprises the following steps:
and selecting the frequency without the co-channel interference risk with other base stations from the frequencies reused by other base stations.
4. The method of claim 1, wherein the determining whether there are frequencies unused by other base stations in the frequencies at risk of co-channel interference with other base stations in the available frequencies of the target base station comprises:
acquiring the frequency use states of other base stations except the target base station in the cluster system;
and judging whether the frequencies which are not used by other base stations exist in the frequencies which have the same frequency interference risks with other base stations in the available frequencies of the target base station according to the frequency use states of other base stations.
5. The method of claim 1, wherein the determining whether there are frequencies unused by other base stations in the frequencies at risk of co-channel interference with other base stations in the available frequencies of the target base station comprises:
acquiring the frequency use state of a base station which has co-frequency interference risk with the target base station in the cluster system;
and judging whether frequencies which are not used by other base stations exist in the available frequencies of the target base station and the frequencies which are at the same frequency interference risk with other base stations or not according to the frequency use state of the base station which is at the same frequency interference risk with the target base station in the cluster system.
6. A device for allocating frequencies among base stations in a trunking system is applied to a target base station in the trunking system, wherein the target base station is any one base station in the trunking system, and the device comprises:
the first judging module is used for judging whether frequencies without co-frequency interference risks with other base stations exist in the available frequencies of the target base station;
a first selecting module, configured to select, from available frequencies of the target base station, a frequency without co-channel interference risk with other base stations as a to-be-used frequency of the target base station if there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station;
a second judging module, configured to judge whether there is a frequency unused by another base station in a frequency having a risk of co-channel interference with another base station in the available frequency of the target base station if there is no frequency having a risk of co-channel interference with another base station in the available frequency of the target base station;
and a second selection module, configured to select, if there are frequencies that are not used by other base stations in frequencies that are at risk of co-channel interference with other base stations in available frequencies of the target base station, frequencies that are not used by other base stations from the frequencies that are at risk of co-channel interference with other base stations, as the to-be-used frequencies of the target base station.
7. The apparatus of claim 6, wherein the first determining module is specifically configured to: judging whether frequencies which are not multiplexed by other base stations exist in the available frequencies of the target base station or not according to a frequency multiplexing table, wherein the frequency multiplexing table records the distribution situation of the available frequencies of each base station in the trunking system;
if the available frequency of the target base station has a frequency which is not multiplexed by other base stations, triggering the first selection module to select the frequency which is not multiplexed by other base stations from the available frequency of the target base station as the frequency to be used of the target base station;
if the available frequency of the target base station does not have a frequency which is not reused by other base stations, obtaining a result of pre-evaluating the co-channel interference risk among the base stations in the cluster system as an interference risk evaluation result;
judging whether a frequency without co-channel interference risk with other base stations exists in available frequencies of the target base station which are reused by other base stations or not according to the frequency reuse table and the interference risk evaluation result;
if there is a frequency without co-channel interference risk with other base stations in the available frequencies of the target base station multiplexed by other base stations, triggering the first selection module to select a frequency without co-channel interference risk with other base stations from the frequencies multiplexed by other base stations as the to-be-used frequency of the target base station.
8. The apparatus of claim 6, wherein the second determining module is specifically configured to:
acquiring the frequency use states of other base stations except the target base station in the cluster system;
judging whether unused frequencies of other base stations exist in the frequencies with the risk of co-channel interference between the available frequencies of the target base station and other base stations according to the frequency use states of other base stations;
or the like, or, alternatively,
the second determining module is further specifically configured to:
acquiring the frequency use state of a base station which has co-frequency interference risk with the target base station in the cluster system;
and judging whether frequencies which are not used by other base stations exist in the available frequencies of the target base station and the frequencies which are at the same frequency interference risk with other base stations or not according to the frequency use state of the base station which is at the same frequency interference risk with the target base station in the cluster system.
9. A base station, comprising: a memory for storing a program and a processor;
the processor, when executing the program, implements a method of frequency allocation between base stations in a cluster system as claimed in claims 1-5.
10. A computer-readable storage medium having stored thereon computer-executable instructions which, when loaded and executed by a processor, implement a method of frequency allocation between base stations in a cluster system as claimed in any one of claims 1 to 5.
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| JPH0491522A (en) * | 1990-08-06 | 1992-03-25 | Nippon Telegr & Teleph Corp <Ntt> | Mobile communication equipment |
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