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Wireless multimedia service is considered a promising application in the near future. However, current layered protocol stack is not conductive to provide adaptive multimedia streams in instable wireless environment. In this paper, a new Cross-Layer mechanism is proposed to solve this problem. A scalable video encoder can dynamically adjust its coding behavior according to the estimated available...
Automatic repeat request (ARQ) techniques employed by leading wireless technologies aim at compensating the high error rates due to radio impairments, but do not offer any differentiated levels of protection. In this work, we propose to enable per-packet differentiation of link layer ARQ protection (in terms of no. of retransmissions) driven by requirements of the end applications as well as of communication...
Wireless multimedia technology has witnessed a rapid development in recent years due to explosive growth in communication, commerce and entertainment services. Undoubtedly, future wireless communication systems will eventually integrated a broad range of multimedia services such as voice, video, and data. This will have a profound impact on the way individuals communicate and access information. It...
Adaptive ARQ is applied to a wireless network, altering retransmission policy according to content importance. By a video deadline-aware buffer discard policy, repeated transmission of expired packets and buffer overflow are mitigated, helping to maintain video quality. Multiple deadlines are applied according to picture type. The combined policy is demonstrated for a bluetooth piconet achieving fast...
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