A Soft Resource Reservation Scheme for Layered Video During Handoff on The 3G Wireless Networks

Abstract

In this paper, the basic frame is 3G wireless network, however, concern with actual wireless network, the change of bandwidth caused by handoff in base station from mobile host (MH) is to maintain the service quality for multi-media video play. The method of this research is to make use of location of MH, direction of movement, and state of speed, and coordinates with neural network system to estimate on target cell. Meanwhile, in order to avoid processing early for target cell results in the idle waste of resource, in this system, we present a scheme for Soft Resource Reservation to let reserved resource become really active upon MH enter into the boundary of the cell. Viewing from the point of application, in order to solve the negative influence of Handoff Delay for multi-media play, in this system, we adopt mechanism of multi-rate for transmission to separate multi-media stream into Base Layer and Enhancement Layer. Besides, in the resource allocation, Base Layer has the higher priority to sustain a normal reception of packet for Base Layer and let the process of playing not be interrupted.