Tanmay Ratnaparkhe, Sagar Natekar, Shridhar Chandan, V. Sadaphal
{"title":"Selection of time synchronizing nodes in wireless sensor network","authors":"Tanmay Ratnaparkhe, Sagar Natekar, Shridhar Chandan, V. Sadaphal","doi":"10.1109/COMSNETS.2010.5431974","DOIUrl":null,"url":null,"abstract":"Time synchronization is a critical piece of infrastructure in any wireless sensor network. Time synchronizing nodes are nodes which are responsible for propagating time in the network. Other nodes in the network synchronize themselves with respect to the synchronizing nodes. For various reasons, it is desirable that the number of such nodes is minimized. In this paper, we consider selection of time synchronizing nodes for two protocols viz. a protocol that helps propagate absolute time in the network and another protocol that provides nodes with local relative timescales. We show that the problem of selection of minimum number of time synchronizing nodes for the two protocols is NP-Complete. We then consider selecting time synchronizing nodes for one of the two protocols, Reference Broadcast Synchronization (RBS) protocol, present simulation results. We further present a fault tolerant selection of synchronizing nodes for RBS.","PeriodicalId":369006,"journal":{"name":"2010 Second International Conference on COMmunication Systems and NETworks (COMSNETS 2010)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2010-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2010 Second International Conference on COMmunication Systems and NETworks (COMSNETS 2010)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/COMSNETS.2010.5431974","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
Time synchronization is a critical piece of infrastructure in any wireless sensor network. Time synchronizing nodes are nodes which are responsible for propagating time in the network. Other nodes in the network synchronize themselves with respect to the synchronizing nodes. For various reasons, it is desirable that the number of such nodes is minimized. In this paper, we consider selection of time synchronizing nodes for two protocols viz. a protocol that helps propagate absolute time in the network and another protocol that provides nodes with local relative timescales. We show that the problem of selection of minimum number of time synchronizing nodes for the two protocols is NP-Complete. We then consider selecting time synchronizing nodes for one of the two protocols, Reference Broadcast Synchronization (RBS) protocol, present simulation results. We further present a fault tolerant selection of synchronizing nodes for RBS.