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TD-SCDMA frequency assignment method

A TD-SCDMA, frequency allocation technology, applied in electrical components, wireless communication, network planning and other directions, can solve problems such as premature convergence, long operation time, etc., to achieve the effect of high frequency utilization

Inactive Publication Date: 2014-10-08
HUNAN UNIV
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Problems solved by technology

[0007] In order to overcome the problems of premature convergence and long operation time, we propose a super-heuristic genetic algorithm to solve the frequency allocation problem of TD-SCDMA network

Method used

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Embodiment Construction

[0031] The execution process of the hyperheuristic genetic algorithm is as follows: Figure 5 shown. The specific process is as follows: ① Randomly allocate a frequency for each carrier according to the available frequency of the current TD-SCDMA network carrier, and take this scheme as the current optimal allocation scheme. ② Randomly generate a population of chromosomes, each chromosome is a sequence of low-level heuristic strategies of length L, and the structure of the chromosome is as follows Figure 4 shown. ③Randomly select 2 individuals from the population as parents. ④ carried out by the parent n c crossover gets 2 n c individual. The crossover method uses a single point crossover. ⑤ For the above offspring individuals according to p b The probability of mutation operation to get the final offspring. The mutation operation uses the method of uniform mutation. ⑥ For each individual of the final offspring k , call the heuristic method to reassign the freque...

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Abstract

The invention relates to a TD-SCDMA frequency assignment method. Problems in the TD-SCDMA frequency are solved with the hyper-heuristics genetic algorithm. The problems that an existing method is precocious in convergence and long in operation time are solved. The execution process of the hyper-heuristics genetic algorithm is shown in the figure. According to the hyper-heuristics genetic algorithm, an appropriate strategy profile is selected with the high-layer genetic algorithm to continuously optimize annoyance values of a current frequency assignment scheme, and the network quality is continuously improved. According to the TD-SCDMA interference calculation formula, six optimizing strategies are designed and comprise the greedy strategy, the random strategy and the high-speed searching strategy, the random strategy is prevented from being caught into local optimum, and the searching speed can be increased through the high-speed searching strategy. By means of the TD-SCDMA frequency assignment method, the frequency assignment scheme with small interference can be found within a short time.

Description

technical field [0001] The invention relates to a TD-SCDMA frequency allocation method, which is characterized in that a super-heuristic genetic algorithm is used to allocate the frequency of the TD-SCDMA network to minimize network interference and improve network quality. Background technique [0002] With the continuous construction and expansion of mobile communication networks, the planning of frequency resources has become an important part of mobile communication network planning, which will have a serious impact on network performance. Different frequency allocation schemes lead to different network interferences. Finding a good frequency allocation method is an urgent problem for operators to solve. figure 1 It is the structure of TD-SCDMA network, among which there are NodeB (base station) and Cell (cell) related to frequency allocation. The base station transmits carrier waves to the cell, and the users located in the cell use these carriers for wireless communic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/04H04W72/08H04W72/54
Inventor 杨超彭书名蒋斌李仁发
Owner HUNAN UNIV
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