RMAC: A Routing-Enhanced Duty-Cycle MAC Protocol for Wireless Sensor Networks

—Duty-cycle MAC protocols have been proposed to meet the demanding energy requirements of wireless sensor networks. Although existing duty-cycle MAC protocols such as S-MAC are power efficient, they introduce significant end-to-end delivery latency and provide poor traffic contention handling. In this paper, we present a new duty-cycle MAC protocol, called RMAC (the Routing enhanced MAC protocol), that exploits cross-layer routing information in order to avoid these problems without sacrificing energy efficiency. In RMAC, a setup control frame can travel across multiple hops and schedule the upcoming data packet delivery along that route. Each intermediate relaying node for the data packet along these hops sleeps and intelligently wakes up at a scheduled time, so that its upstream node can send the data packet to it and it can immediately forward the data packet to its downstream node. When wireless medium contention occurs, RMAC moves contention traffic away from the busy area...

• Type: Conference
• Year: 2007
• Where: INFOCOM
• Authors: Shu Du, Amit Kumar Saha, David B. Johnson
• Keywords: Communications, Data Packets, End-to-end Delivery Latency, INFOCOM 2007, MAC Protocol