Title :
Power efficiency in IEEE 802.11a WLAN with cross-layer adaptation
Author :
Zhao, Jun ; Guo, Zihua ; Zhu, Wenwu
Author_Institution :
Microsoft Res. Asia, Beijing, China
Abstract :
Power consumption is one of the most stringent bottlenecks in mobile devices. In this paper, we investigate the joint effect of MAC and PHY layers on power efficiency in IEEE 802.11a WLAN. Specifically, we study the link adaptation for a power efficient transmission by selecting a proper transmission mode and power level with the aid of our derived power efficiency model. This study addresses the fundamental impact of the CSMA MAC protocol on the power efficiency of IEEE 802.11a WLANs. Some implications for system design are also discussed. In particular, we show that the non-radio-transmission power plays an important role in the power optimization of IEEE 802.11a WLAN.
Keywords :
access protocols; carrier sense multiple access; mobile radio; optimisation; wireless LAN; CSMA MAC protocol; IEEE 802.11a WLAN; MAC layers; PHY layers; carrier sense multiple access; cross-layer adaptation; link adaptation; media access control layer; mobile device; mode selection; nonradio-transmission power; power efficiency; power optimization; transmission mode; Bandwidth; Batteries; Bit rate; Energy consumption; Media Access Protocol; Modulation coding; Multiaccess communication; Physical layer; Power system modeling; Wireless LAN;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1203960
