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Graph coloring-based wireless frequency allocation working method

A technology of wireless frequency and working method, applied in the field of information communication, can solve the problems such as the inability to guarantee the optimal solution, the inability of the frequency allocation algorithm to apply to the wireless ad hoc network, and the long time period.

Inactive Publication Date: 2011-05-18
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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Problems solved by technology

Therefore, many frequency allocation algorithms that are currently successfully applied in the field of mobile communication cannot be applied to wireless ad hoc networks.
[0004] In addition, most of the existing wireless frequency allocation technologies use exhaustive search methods or polynomial time to obtain the optimal solution of frequency allocation. These methods have a long period of time and cannot guarantee the optimal solution without frequency conflicts.

Method used

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  • Graph coloring-based wireless frequency allocation working method
  • Graph coloring-based wireless frequency allocation working method

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Embodiment Construction

[0022] V k The coloring algorithm for can be given by the following formula:

[0023] Order C k = C 0

[0024] C k = C k +1, |C k -C l | k = C k ,|C k -C l | ≥ Wj (l=1..n and l ≠ k, Wj is V k and V l sides between).

[0025]

[0026] For example, if there are five wireless subnets A, B, C, D, and E below, the subnets are abstracted into vertices, and several edges with weights are generated between the subnets according to the frequency interval rules. The relationship between nets and subnets is abstracted as an undirected graph, as shown in the accompanying drawings figure 1 Shown:

[0027] The algorithm selects the vertex B with the highest degree from the graph, assigns the default initial color number 1, and then colors the adjacent vertices of vertex B in turn. The color numbers for A, C, and E are: 6, 4, 7, and finally Color vertex D as 11. After coloring, the algorithm selects f6, f1, f4, f11, and f7 from the frequency table {f1, f2, ..., fn (n>1)}...

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Abstract

The feasible solution of a large number of non-player character (NPC) problems in engineering practice is acquired by a few approximation algorithms, so a graph coloring-based frequency allocation algorithm is to acquire the approximate optimal solution of the problems on the premise of a plurality of limiting conditions. The invention provides the specific steps of the graph coloring-based frequency allocation algorithm.

Description

technical field [0001] The invention relates to the field of information communication, in particular to a frequency allocation method. Background technique [0002] The allocation of radio frequency resources is one of the issues that must be considered during the organization and operation of wireless communication networks. The organization and use of large-scale wireless communication networks involves the planning and maintenance of hundreds or even more wireless subnets. How to effectively and rationally use limited frequency resources is essential for organizing, opening, and operating wireless communication networks and reducing frequency interference. It is very important to improve the service quality of the wireless communication network. [0003] At present, the frequency allocation algorithms mainly include heuristic algorithm, graph theory algorithm, genetic algorithm and neural network algorithm. frequency planning requirements. For example, frequency reuse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14
Inventor 杨震孟凡欣冯志先
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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