QoS-Directed Error Control of Video Multicast in Wireless Networks

This paper presents a QoS-Directed Error Control scheme (QDEC) for video multicast in wireless networks. In order to provide multimedia services to mobile users, it is necessary to have not only sufficient bandwidth, but also effective control over wireless channel errors, which are characterized as bursty and location-dependent. The QDEC scheme includes: a video QoS differentiation specification to direct the error control; and three error control algorithms with corresponding channel error conditions under which the algorithms should be chosen.