This paper proposes a novel error protection method that can provide adaptive quality-of service (QoS) to layered coded video by utilizing priority queueing at the network layer and retry-limit adaptation at the link layer. The design of the method is motivated by the observation that the retry limit settings of the MAC layer can be optimized in such a way that the overall packet losses that are caused by either link erasure or buffer overflow are minimized. In this proposed transmission framework, the retry limits are dynamically adapted depending on the wireless channel conditions and traffic characteristics.
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