Priority hop vertical handoff method based on time threshold between heterogeneous networks

Abstract

The invention discloses a priority hop vertical handoff method based on a time threshold between heterogeneous networks. According to the method, on the basis of a vertical handoff method based on the time threshold, a priority hop algorithm for call occupation and channel preemption in a cellular coverage area is provided, so the capabilities of competing for cellular mobile channels by various calls under different environments are adjusted, and moreover, through design of a DVH (Downlink Vertical Handoff) decision-making algorithm for online voice calls in a double-coverage area, the congestion degree of the channels in the cellular coverage area is mitigated. According to the method, a high cellular mobile channel utilization rate of a system is kept, moreover, at the cost of influencing the partial service quality of non-sensitive voice users limitedly, a priority UVH call loss rate, a non-priority UVH call loss rate and the newly increased cellular call congestion rate performance of the system are clearly improved, and the beneficial effect of effectively utilizing channel resources is realized.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a time threshold-based priority jump vertical switching method among heterogeneous networks. Background technique [0002] At present, with the continuous growth of people's demand for mobile access services, the next-generation wireless communication technology is developing towards the direction of realizing heterogeneous wireless network intercommunication. Cellular mobile network and wireless local area network (WLAN) are two major wireless communication networks in modern wireless communication. The cellular mobile network is characterized by large coverage and low bandwidth. On the contrary, WLAN has the characteristics of small coverage and high bandwidth. The intercommunication between the cellular mobile network and WLAN can make the advantages of the two complement each other and enhance the service quality (QoS) of the provided services. [0003] The p...

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Problems solved by technology

M. Salamah et al pointed out in the paper "A FairBandwidth Allocation Scheme for Multimedia Handoff Calls in CellularNetworks" published in the journal "New Trends in Computer Networks" in 2005: "For online voice calls, if the duration of the call is very short, the call will be dropped. , the user will be very angry, and when the call is dropped after a certain period of time, the user's dissatisfaction will not be so strong; similarly, for online data calls, when the connection time is less than an acceptable range, the user generally can Tolerant, but when the online data transmission has been going on for a considerable period of time and the connection drops, the user's dissatisfaction will be quite strong”

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