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학술지 Multihop Rate Adaptive Wireless Scalable Video Using Syndrome-Based Partial Decoding
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저자
조용주, Hayder Radha, 서정일, 강정원, 홍진우
발행일
201004
출처
ETRI Journal, v.32 no.2, pp.273-280
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.10.1409.0072
협약과제
10MR4100, IPTV용 Interactive 시점제어 기술 개발, 차지훈
초록
The overall channel capacity of a multihop wireless path drops progressively over each hop due to the cascading effect of noise and interference. Hence, without optimal rate adaptation, the video quality is expected to degrade significantly at any client located at a far-edge of an ad-hoc network. To overcome this limitation, decoding and forwarding (DF), which fully decodes codewords at each intermediate node, can be employed to provide the best video quality. However, complexity and memory usage for DF are significantly high. Consequently, we propose syndrome-based partial decoding (SPD). In the SPD framework an intermediate node partially decodes a codeword and relays the packet along with its syndromes if the packet is corrupted. We demonstrate the efficacy of the proposed scheme by simulations using actual 802.11b wireless traces. The trace-driven simulations show that the proposed SPD framework, which reduces the overall processing requirements of intermediate nodes, provides reasonably high goodput when compared to simple forwarding and less complexity and memory requirements when compared to DF. Copyright © 2010 ETRI.
키워드
Forward error correction (FEC), Multihop wireless channel, Scalable video
KSP 제안 키워드
Ad Hoc Networks, Cascading effect, Channel capacity, Decoding and forwarding, Effect of Noise, Forward error correction(FEC), Intermediate Nodes, Optimal rate adaptation, Rate adaptive, Scalable Video, Syndrome-based