Abstract
With the advances in heterogeneous wireless networks and smart mobile terminals,mobile multimedia conferencing gradually becomes the new trend and research focus.However,in the unreliable and time-varying wireless networks,video stalls and glitches caused by the endto-end delay often occur during the meeting sessions.These problems significantly degrade the Quality of Service(QoS)of the multimedia conferencing.In this paper,we propose an application-layer end-to-end QoS guarantee strategy,which jointly exploits the packet fragmentationreassembly and path diversity over heterogeneous wireless networks.First,video packets are fragmented into several units with regard to bandwidth,latency,weight,packet size and other metrics.Second,after the arrival of all the fragmented units,they will be checked and reassembled.This process is realized by the proposed PFDA-PRRA algorithm,which constructs an endto-end virtual path for guaranteeing the fast transmission of video streaming.Simulation results show that the proposed QoS guarantee strategy effectively aggregates bandwidth of heterogeneous wireless networks and reduces one-way delay.
Published Version
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