Adaptive Power and Rate Allocation for Mobile Multicast Throughput Optimization Over Fading Channels in Wireless Networks

We investigate adaptive power and rate allocation schemes for multicast over fading channels in wireless networks. Specifically, we take advantage of the superposition coding to achieve high multicast throughput, where the transmitted signal consists of multiple parallel sub-stream signals. Each rec...

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Vydané v:Proceedings of 15th International Conference on Computer Communications and Networks s. 261 - 266
Hlavní autori: Qinghe Du, Xi Zhang
Médium: Konferenčný príspevok..
Jazyk:English
Vydavateľské údaje: IEEE 01.10.2006
Predmet:
Adaptive control
adaptive modulation and coding
adaptive power allocation
Broadcasting
Decoding
Fading
Mobile multicast
Modulation coding
Programmable control
Resource management
Signal to noise ratio
Throughput
Wireless networks
ISBN:1424405726, 9781424405725
ISSN:1095-2055
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Popis
Shrnutí:We investigate adaptive power and rate allocation schemes for multicast over fading channels in wireless networks. Specifically, we take advantage of the superposition coding to achieve high multicast throughput, where the transmitted signal consists of multiple parallel sub-stream signals. Each receiver decodes the sub-stream signals within its decoding capability determined by the received signal to noise ratio (SNR). Under the above architecture, we first formulate the multicast throughput optimization problem to obtain the power allocation policy for each sub-stream signal subject to the total power constraint. Also, we develop a selective retransmission strategy to guarantee all receivers to recover the same data copy without unnecessary data reception. By introducing the concept of compensation ratio, we derive the optimal power allocation policy of the formulated throughput optimization problem for the two-receiver scenario. Numerical results are also presented to show the throughput improvement over the worst-case SNR-dominating (WSD) rate policy, the best-case SNR-dominating (BSD) rate policy, and the constant-rate policy.
ISBN:1424405726
9781424405725
ISSN:1095-2055
DOI:10.1109/ICCCN.2006.286283