Adaptive access and rate control of CSMA for energy, rate, and delay optimization
| Autor: | Pedro M. Crespo, Babak Hossein Khalaj, Mahdi Mahdi Khodaian, Jesus Perez |
|---|---|
| Přispěvatelé: | Universidad de Cantabria |
| Jazyk: | angličtina |
| Předmět: |
Mathematical optimization
Adaptive control Computer science Computer Networks and Communications Real-time computing Link adaptation Dynamic programming Wireless Control adaptativo Queue Wireless channel Queue management system Concave function Adaptive algorithm Wireless network business.industry Canal inalámbrico Energy consumption Computer Science Applications Link-state routing protocol Programación dinámica Signal Processing business CSMA Communication channel |
| Zdroj: | EURASIP Journal on Wireless Communications and Networking 2012, 27 EURASIP Journal on Wireless Communications and Networking 2012, 2012:27 UCrea Repositorio Abierto de la Universidad de Cantabria Universidad de Cantabria (UC) |
| ISSN: | 1687-1499 |
| DOI: | 10.1186/1687-1499-2012-27 |
| Popis: | In this article, we present a cross-layer adaptive algorithm that dynamically maximizes the average utility function. A per stage utility function is defined for each link of a carrier sense multiple access-based wireless network as a weighted concave function of energy consumption, smoothed rate, and smoothed queue size. Hence, by selecting weights we can control the trade-off among them. Using dynamic programming, the utility function is maximized by dynamically adapting channel access, modulation, and coding according to the queue size and quality of the time-varying channel. We show that the optimal transmission policy has a threshold structure versus the channel state where the optimal decision is to transmit when the wireless channel state is better than a threshold. We also provide a queue management scheme where arrival rate is controlled based on the link state. Numerical results show characteristics of the proposed adaptation scheme and highlight the trade-off among energy consumption, smoothed data rate, and link delay. This study was supported in part by the Spanish Government, Ministerio de Ciencia e Innovación (MICINN), under projects COMONSENS (CSD2008-00010, CONSOLIDER-INGENIO 2010 program) and COSIMA (TEC2010-19545-C04-03), in part by Iran Telecommunication Research Center under contract 6947/500, and in part by Iran National Science Foundation under grant number 87041174. This study was completed while M. Khodaian was at CEIT and TECNUN (University of Navarra). |
| Databáze: | OpenAIRE |
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