An Efficient Energy Conserving Scheme for IEEE 802.11 ADHOC Networks

Battery power is one of the major and limited resources in wireless communication. In the distributed coordination function (DCF) of IEEE 802.11 power saving mechanism (PSM), energy consumption can be reduced by turning off the radio during idle times. However, IEEE 802.11 PSM is known to cause unnecessary energy consumption due to the problems of an overhearing, a back-off time delay and possible packet collisions. To overcome these problems, we present a new MAC protocol called 'slot based PSM (static and dynamic)' for IEEE 802.11 WLANs. In our proposed scheme, the beyond-ATIM window is divided into a number of time slots, and any node that participates in communication wakes up in its slot times only and other nodes can enter to doze mode during the slot times.

[1]  Yu-Chee Tseng,et al.  Power-saving protocols for IEEE 802.11-based multi-hop ad hoc networks , 2002, Proceedings.Twenty-First Annual Joint Conference of the IEEE Computer and Communications Societies.

[2]  Young-Bae Ko,et al.  Enhanced Power Saving for IEEE 802.11 WLAN with Dynamic Slot Allocation , 2005, MSN.

[3]  Voon Chin Phua,et al.  Wireless lan medium access control (mac) and physical layer (phy) specifications , 1999 .

[4]  Nitin H. Vaidya,et al.  An energy efficient MAC protocol for wireless LANs , 2002, Proceedings.Twenty-First Annual Joint Conference of the IEEE Computer and Communications Societies.

[5]  Adam Wolisz,et al.  Power-saving mechanisms in emerging standards for wireless LANs: the MAC level perspective , 1998, IEEE Wirel. Commun..

[6]  Shih-Lin Wu,et al.  An energy efficient MAC protocol for IEEE 802.11 WLANs , 2004, Proceedings. Second Annual Conference on Communication Networks and Services Research, 2004..