Resource Allocation for Scalable Videos over Cognitive Radio Networks

Abstract

This chapter examines the problem of video over infrastructure-based cognitive radio (CR) networks. It considers cross-layer design factors such as scalable video coding, spectrum sensing, opportunistic spectrum access, primary user protection, scheduling, error control, and modulation. The chapter investigates two challenging problems of enabling video over CR networks: an Institute of Electrical and Electronics Engineers 802/22 wireless regional area network-like, infrastructure-based CR network where the base station coordinates spectrum sensing and access, and a multi-hop CR network, such as a wireless mesh network with CR-enabled nodes. The high potential of CRs has attracted considerable interest from industry, government, and academia. Video multicast, as one of the most important multimedia services, has attracted considerable interest from the research community. The time slot structure is the same as that in the case of infrastructure-based CR networks. During the transmission phase of a time slot, a CR user determines which channel(s) to access for transmission of video data based on spectrum sensing results.