BS-6-6 Improving the performance of duty-cycling MAC protocol using packet aggregation(BS-6. Planning, Control and Management on Networks and Services)

概要

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In wireless sensor networks (WSNs), MAC protocols generally employ a duty cycling mechanism according to which the sensors frequently turn on and off their radio module in order to conserve battery power that would otherwise be wasted by energy-costly idle listening. In duty-cycling MAC protocol, packets often wait in nodes' queue since the sleep duration of radio is much longer than the active duration. Moreover the packets in sensor network usually are forwarded via multiple hops to the sink. These characteristics motivate the utilization of packet aggregation. Using packet aggregation scheme not only increases throughput but also reduces power consumption that is incurred by additional control packets. Since data packets in sensor networks are comparatively small significant gains are to be expected. In this paper we proposed the packet aggregation scheme (PA) which can be applied to the duty cycling MAC protocol in WSN. We evaluated PA with both single hop MAC and multi-hop MAC protocols using the network simulator ns2. The results show that the new protocols combined with PA outperform the originals both in terms of energy efficiency and throughput.
2011-08-30