Title :
A power-saving protocol for ad hoc networks
Author :
Ning, Li ; Xu Yuan ; Sheng, Xie
Author_Institution :
Coll. of Electron. & Inf., South China Univ. of Technol., Guangzhou, China
Abstract :
To extend the usage scope of an 802.11DCF based wireless LAN power-saving protocol 802.11PS to a multi-hop mobile environment, a modified protocol called 802.11NPS is proposed. It uses a packet-driven dynamic switching-off mechanism on the wireless network interface card to save power. By delaying the switching-off operations for a certain period of time after nodes receiving unrelated control packets, 802.11NPS can support the upper layer routing protocol excellently and thus can be used in multi-hop ad hoc networks. It also can be used in fully connected networks. By using a more accurate power-consumption model, the performance of 802.11NPS is studied through simulation. Results show that in a WLAN environment, 802.11NPS can save power by more than 60% as compared with 802.11DCF; while in a multi-hop mobile environment, 802.11NPS can save power by 18%. At the meanwhile, its delay performance is better than that of 802.11DCF and the throughput is still similar.
Keywords :
ad hoc networks; delays; network interfaces; routing protocols; smart cards; wireless LAN; 802.11DCF; 802.11NPS; 802.11PS; WLAN; ad hoc networks; modified protocol; multihop ad hoc networks; multihop mobile environment; packet-driven dynamic switching-off mechanism; power-saving protocol; upper layer routing protocol; wireless LAN; wireless network interface card; Access protocols; Ad hoc networks; Hardware; Packet switching; Portable computers; Spread spectrum communication; Switches; Wireless LAN; Wireless application protocol; Wireless networks;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9335-X
DOI :
10.1109/WCNM.2005.1544175