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http://dx.doi.org/10.7840/kics.2014.39B.2.95

A Scalable Video Coding (SVC)-Aware Retransmission Scheme for Multimedia Streaming in IEEE 802.11 WLANs  

Kim, Namyeong (고려대학교 전기전자공학과)
Song, Taewon (고려대학교 전기전자공학과)
Kim, Wonjung (고려대학교 전기전자공학과)
Pack, Sangheon (고려대학교 전기전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.39B, no.2, 2014 , pp. 95-101 More about this Journal
Abstract
Scalable video coding (SVC) encodes multimedia data into a base layer and enhancement layers to cope with variable network conditions in an adaptive manner. In SVC, enhancement layers can be decoded only when the base layer is successively received. However, existing works on SVC transmissions in IEEE 802.11 WLANs do not fully investigate this characteristic and thus their performance can be degraded. In this paper, we propose a SVC-aware retransmission (SAR) scheme in IEEE 802.11 WLANs. The SAR scheme applies different retransmission policies for base and enhancement layers by obtaining the optimal number of frames to be retransmitted. As a result, the SAR scheme can reduce unnecessary retransmissions and minimize the transmission latency. Simulation results demonstrate that the SAR scheme can reduce unnecessary data transmission by 12.6% and the transmission latency by 6.6~19.1% compared to conventional retransmission schemes.
Keywords
SVC; Retransmission; Cross-layer; Block ACK;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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