Self-adaptation vertical handover method based on RSS (Really Simple Syndication) variation trend

Abstract

The invention discloses a self-adaptation vertical handover method based on an RSS (Really Simple Syndication) variation trend, belonging to the technical field of wireless networks. The self-adaptation vertical handover method comprises the following steps: setting a handover execution threshold value for each candidate network by setting a handover trigger threshold value for a current service network; then measuring the strength value of received signals of the current service network and all the candidate networks and a round-trip time delay value of the current service network, and generating a signal strength sequence and a time delay sequence through normalization processing; and then, respectively averaging the signal strength sequence and the time delay sequence, then updating network evaluation values of all networks, and optimizing the handover triggering threshold values and the handover execution threshold values to realize the self-adaptation vertical handover. In the method, a linear weighting method is used for evaluating a heterogeneous network, meanwhile, a handover judgment threshold value is regulated in a self-adaptation manner according to the variation trendof the strength of the received signals, and thus, rapid and accurate vertical handover is realized.

Description

technical field [0001] The present invention relates to a method in the technical field of wireless networks, in particular to an adaptive vertical handover method based on RSS changing trends. Background technique [0002] With the diversified development of wireless access technologies and the diversity of business operation models, in recent years, heterogeneous network convergence technology has become a hot topic of research by many scholars. The interconnection of heterogeneous networks is the main feature of future communication networks. At present, wireless heterogeneous networks mainly include 802.11-based WiFi networks, Cdma 2000, CDMA-1x EVDO, WCDMA and Wimax networks. As an important control function in supporting wireless heterogeneous network convergence technology, vertical handover is used to ensure communication continuity when users move across heterogeneous networks. It generally includes three steps: network discovery, handover judgment, and handover ex...

AI Technical Summary

Problems solved by technology

But it has two deficiencies: 1) It does not take into account the switching delay and packet loss rate; 2) It only uses RSS as the judgment standard, which cannot completely and accurately reflect the network situation

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