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Indexed by:期刊论文

Date of Publication:2010-03-01

Journal:SENSORS

Included Journals:SCIE、PubMed、Scopus

Volume:10

Issue:3

Page Number:2416-2437

ISSN No.:1424-8220

Key Words:real-time; fault-tolerance; wireless sensor networks; routing protocol

Abstract:In time-critical wireless sensor network (WSN) applications, a high degree of reliability is commonly required. A dynamical jumping real-time fault-tolerant routing protocol (DMRF) is proposed in this paper. Each node utilizes the remaining transmission time of the data packets and the state of the forwarding candidate node set to dynamically choose the next hop. Once node failure, network congestion or void region occurs, the transmission mode will switch to jumping transmission mode, which can reduce the transmission time delay, guaranteeing the data packets to be sent to the destination node within the specified time limit. By using feedback mechanism, each node dynamically adjusts the jumping probabilities to increase the ratio of successful transmission. Simulation results show that DMRF can not only efficiently reduce the effects of failure nodes, congestion and void region, but also yield higher ratio of successful transmission, smaller transmission delay and reduced number of control packets.