Resource allocation with service differentiation for wireless video transmission

The next generation wireless networks need to support video traffic. A major challenge in video services over wireless networks is quality of service (QoS) provisioning. Service differentiation is a good approach for QoS provisioning to video traffic. In this paper, we propose cross-layer protocol stack architecture for wireless video transmission with service differentiation. In the cross-layer architecture, the application layer provides the lower link layer with the video compression information. Using the information, a dynamic-weight generalized processor sharing (DWGPS) discipline is proposed for the link layer resource allocation. The link layer tries to provide the application layer with a stringent delay bound and strong protection to high priority traffic in the case of resource shortage. Acceptable level of fairness can be achieved by DWGPS. A scheduling procedure for DWGPS is presented, which avoids complex per-packet virtual time calculation. It is shown that DWGPS can automatically adapt to multiuser diversity without many modifications. Simulation results demonstrate the effectiveness and efficiency of the link-layer DWGPS resource allocation

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