A Randomized Power Management Protocol with Dynamic Listen Interval for Wireless Ad Hoc Networks
Zi‐Tsan Chou · 2006
In IEEE 802.11 wireless ad hoc networks, the listen interval of a power-saving (PS) station should be fixed at one even there is no data traffic or its remaining battery power is low. However, if the listen interval is allowed more than two beacon intervals, 802.11 power management may completely fail. Hence we propose a new novel randomized power management (RPM), which not only equips the PS stations with dynamic listen interval adjustment ability, but also eliminates the following problems: (i) the possibly forever loss of ATIM frames, (ii) the needless waste of ATIM frames, and (iii) neighbor maintenance problem. Above all, RPM can offer the network designers full flexibility in trading energy, latency, and neighbor discovery probability versus each other by appropriately tuning system parameters. The primary numerical results show that, as compared with 802.11, RPM earns a significant reduction in power consumption at the expense of only a little additional delay.