ayered network handover decision-making method based on fuzzy logic and TOPSIS algorithms

Abstract

The invention makes a request of protecting a handover decision-making method based on fuzzy logic and TOPSIS algorithms. The method comprises two steps of handover candidate user screening and target network selection. At the handover user screening stage, a fuzzy logic algorithm is used for processing user mobile information to obtain a handover suitability degree; and a handover candidate user is selected by combining RSS, a user type, and the user handover suitability degree, and a handover candidate user set is constructed. At the target network selection stage, multi-cell selection is carried out by using an optimization objective function, wherein the objective function considers a cell load, a handover cost, and a network performance comprehensively and the network performance is obtained by processing the RSS, a time delay, mobility support, and energy consumption comprehensively by using a TOPSIS algorithm, and the function aims at realizing cell load equilibrium, network cost minimization, and network performance optimization; and then an optimal cell is selected based on the optimization function and is used as a handover target network. Therefore, the user requirement can be guaranteed and the network equilibrium can be realized.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a layered wireless network switching method. Background technique [0002] Femtocell is a wireless communication system with short coverage distance, low operating cost and low transmission power. It uses ADSL and optical fiber to directly connect to the operator's computer room through the network, which can make up for the lack of coverage in the community and increase the indoor transmission capacity. It is a good solution to indoor communication problems. Femtocells are deployed within the coverage of existing macrocells (Macrocells), forming a layered network architecture, such as figure 1 shown. [0003] In a layered network composed of Femtocell-Macrocell, users need to switch between multiple cells in order to obtain better communication services, and at the same time ensure the seamlessness of switching. Therefore, the research on switching te...

AI Technical Summary

Problems solved by technology

[0005] In the existing handover algorithm, although the network load problem is considered, the load balance is not combined into the handover decision process, and the decision algorithm based on multi-attribute is too complex to be suitable for the real scene, and the proposed The handover algorithm based on mobility only simply judges the speed, and does not further study the speed direction. Therefore, it can be further optimized to reduce the number of handovers. To solve the above problems of the existing algorithm, a new handover is needed. Program

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