Handling Cross Traffic Bursts in Wireless Sensor Networks with Multi-Hop Multi-Channel Wakeup Reservation

Xuan ZHANG  Hao LIU  Fulong JIANG  Zhiqun LI  

IEICE TRANSACTIONS on Communications   Vol.E96-B   No.6   pp.1472-1480
Publication Date: 2013/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.1472
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Network
wireless sensor networks,  cross traffic bursts,  multi-channel,  

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Duty-cycle MAC protocols achieve high energy-efficiency. However, duty-cycle MACs introduce significant end-to-end delivery latency. Recently proposed protocols such as RMAC and PRMAC improve the latency of duty-cycle MAC protocols by employing a mechanism of multi-hop wakeup reservation to allow a packet to be forwarded over multiple hops in a single communication cycle. However, these protocols can not efficiently handle cross traffic bursts which are common in applications with space-correlated event detection. If there are multiple packets to send in each flow, most of the data packets will be seriously postponed. This paper proposes a multi-channel pipelined routing-enhanced MAC protocol, called MPR-MAC, to handle this problem. By jointly employing channel diversity and time diversity, MPR-MAC allows cross data flows to forward multiple packets respectively in a single communication cycle without interfering with each other. Simulation results show the advantage of MPR-MAC in handling cross data flows and the significant performance upgrade in terms of end-to-end latency and energy efficiency.