Policy Allocation for Transmission of Embedded Bit Streams over Noisy Channels with Feedback
| Autor: | Jinshi Qiu, Amir H. Banihashemi |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Network packet
business.industry Computer science Automatic repeat request ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Hybrid automatic repeat request Data_CODINGANDINFORMATIONTHEORY Transmission (telecommunications) Computer Science::Multimedia Computer Science::Networking and Internet Architecture Fading Forward error correction business Computer Science::Information Theory Computer network Communication channel Rayleigh fading |
| Zdroj: | DCC |
| DOI: | 10.1109/dcc.2009.12 |
| Popis: | An efficient policy allocation algorithm for the transmission of embedded bit streams over noisy channels with feedback is proposed. The transmission is based on the Type-II Hybrid ARQ/FEC protocol and uses a nested sequence C of channel codes to protect the packets. There are also constraints on the total bit budget and on the allowed number of retransmissions per packet. The allocation algorithm assigns different protection policies, each policy being a subset of C, to different packets to maximize the average number of correctly received source bits. We study the performance and the complexity of the proposed scheme through the transmission of images encoded by JPEG2000 over mobile channels with correlated Rayleigh fading. We demonstrate by simulations that the proposed multiple-policy scheme provides significant improvements over a purely FEC scheme with no feedback and also the existing fixed-policy (equal error protection) schemes. Our results show that feedback is particularly helpful for poor channel conditions and that the proposed scheme is very robust against changes in the channel signal-to-noise ratio (SNR) and the mobile speed. |
| Databáze: | OpenAIRE |
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