Multi-attribute handover decision method for heterogeneous vehicle communication network

Abstract

A multi-attribute handover judging method for a heterogeneous vehicle communication network comprises the following steps: a handover management entity reads information on a candidate network in a field network report buffer entity, and the diameter of the coverage region of the candidate network is calculated; a mobility prediction information management entity acquires position information and speed information of a mobile user, and sends the position information and the speed information to the handover management entity; possible residence time and throughput capacity in each neighbor access network of the mobile user is estimated, when the throughput capacity during handover is higher than the throughput capacity in a normal state, the candidate network is added in an alternative list; an optimal target access network is determined to be switched into the network by the handover management entity via an analytic hierarchy process and according to service quality requirements; when the intensity of the current switch-in network signal is lowered to a threshold value, a handover execution instruction is sent to carry out handover. The multi-attribute handover judging method provided by the invention avoids unnecessary handover when a traveling vehicle passes through a region covered by heterogeneous access network, reduces handover delay and ensures the continuity of the communication.

Description

technical field [0001] The present invention relates to the field of heterogeneous vehicle communication network, more specifically, it relates to the method of using multi-attribute handover decision algorithm based on movement prediction for multi-interface mobile node or multi-interface mobile router in heterogeneous vehicle communication network. Background technique [0002] In recent years, the vehicle communication network has gradually become a hot issue in the field of intelligent transportation system (Intelligent Transport System, ITS). All countries are committed to applying advanced communication technologies, such as IEEE 802.11, 3G cellular and satellite communication and other wireless network access technologies, to the transportation system to ensure the safe and efficient operation of vehicles and provide ubiquitous services for high-speed mobile users. information services. In order to ensure the continuity of sessions when users move across multiple acc...

AI Technical Summary

Problems solved by technology

If the residence time is very short, although a higher data rate can be obtained after switching, switching will occur soon, and the cost of switching is greater than the advantage of short-term high-speed data transmission

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