Title :
Multi-hop based highly precise time synchronization Protocol for ZigBee networks
Author :
Song, Ping ; Li, Kejie ; Shan, Xiaodong ; Qi, Guangping
Author_Institution :
Intell. Robot. Inst., Beijing Inst. of Technol., Beijing, China
Abstract :
Wireless sensor networks (WSN) have emerged as an interesting and important research area in the last few years. Time synchronization is a critical middleware service of distributed system. In particular, wireless sensor networks is a distributed system which makes extensive use of synchronized time in many contexts (e.g. for data fusion, TDMA schedules, synchronized sleep periods, etc.). In addition, synchronization precision has become a critical area of research today. Time synchronization with very high precision is needed at some special application. In this paper, we proposed a high degree of accuracy time synchronization protocol-physical layer integrated synchronization protocol (PLISP). Different from adding timestamp in MAC layer of traditional time synchronization protocol, we advocate a novel way to add timestamp. We add timestamp in physical layer which can utmost reduce influence of nondeterminancy factor to synchronization precision. Result shows that this method is feasible and can be used to wireless sensor networks based on multi-hop.
Keywords :
personal area networks; protocols; wireless sensor networks; TDMA schedules; ZigBee networks; data fusion; distributed system; middleware service; nondeterminancy factor; physical layer integrated synchronization protocol; synchronized sleep periods; time synchronization protocol; wireless sensor networks; Delay effects; Intelligent networks; Intelligent robots; Intelligent sensors; Peer to peer computing; Protocols; Robot sensing systems; Spread spectrum communication; Wireless sensor networks; ZigBee; Time Synchronization; ZigBee Networks; high precise; multi-hop;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4076-4
DOI :
10.1109/MAPE.2009.5355845