Minimize waiting time and conserve energy by scheduling transmissions in IEEE 802.11-based ad hoc networks

Chih-Shun Hsu, Jang-Ping Sheu, Yu-Chee Tseng
10th International Conference on Telecommunications, 2003. ICT 2003.  
The mobile ad hoc network (MA") has attracted lots of attention recently. Most of the researches assume that every mobile host in the MANET uses a fixed data rate and follows a distributed coodination function (DCF) to transmit messages. As we know that none of the research has combined multiple data M bitdsec, 2M bitdsec, 5.5 M bitdsec, and 11 M bitdsec) and Lucent's WaveLAN II device has dready supported multiple data transmission rates [2]. Therefore, we shall allow every mobile host to
more » ... mobile host to adopt the most efficient data rate to transmit messages as long as the channel quality permits, yet, bow to detect the channel quality and decide the most efficient data transmission rate are still open questions. rates and transmission scheduling to minimize waiting time and conserve energy for a MANET with powersaving ( P S ) mode hosts. IEEE 802.1 1 has already supported multiple data transmission rate. However, how to decide the transmission rate is still an open question. Here, we propose a data rate selection protocol to select the best available data rate to transmit messages. After the data transmission rate has been selected, we can schedule each transmission according to the data transmission rate and the packet size. Our goal is to minimize the average waiting time of each transmission and thus the P S hosts can switch back to power-saving mode as soon as possible. Therefore, we follow the shortest job first policy to let the transmission with shortest transmission time to access the channel fist. Simulation results show that our scheduling protocol can achieve high packet delivery rate, reduce waiting time and conserve lots of energy. Keywords: mobile ad-hoc network (MANET), multiple data rate, transmission scheduling. of them schedules transmissions according to the data rate and the packet size. None of the research has combined multiple data rates and transmission scheduling to minimize the waiting time of each transmission. In a single-hop MANET with some power-saving ( P S ) mode hosts, 0-7803-7661-7/03/$I7.0002003 IEEE 393 /
doi:10.1109/ictel.2003.1191264 fatcat:fxitzt7f5jeitahkvb4kcuismq