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학술지 Multihop Rate Adaptive Wireless Scalable Video Using Syndrome-Based Partial Decoding
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조용주, Hayder Radha, 서정일, 강정원, 홍진우
ETRI Journal, v.32 no.2, pp.273-280
한국전자통신연구원 (ETRI)
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.
KSP 제안 키워드
Ad Hoc Networks, Cascading effect, Channel capacity, Decoding and forwarding, Effect of Noise, Intermediate Nodes, Optimal rate adaptation, Rate adaptive, Scalable Video, Syndrome-based, Trace-driven