A Community-Based Event Delivery Protocol in Publish-Subscribe Systems for Delay Tolerant Sensor NetworksReport as inadecuate




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Department of Computer Science and Engineering, University of Electronic Science and Technology of China, Cheng du 610054, China





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Abstract The basic operation of a Delay Tolerant Sensor Network DTSN is to finish pervasive data gathering in networks with intermittent connectivity, while the publish-subscribe Pub-Sub for short paradigm is used to deliver events from a source to interested clients in an asynchronous way. Recently, extension of Pub-Sub systems in DTSNs has become a promising research topic. However, due to the unique frequent partitioning characteristic of DTSNs, extension of a Pub-Sub system in a DTSN is a considerably difficult and challenging problem, and there are no good solutions to this problem in published works. To ad apt Pub-Sub systems to DTSNs, we propose CED, a community-based event delivery protocol. In our design, event delivery is based on several unchanged communities, which are formed by sensor nodes in the network according to their connectivity. CED consists of two components: event delivery and queue management. In event delivery, events in a community are delivered to mobile subscribers once a subscriber comes into the community, for improving the data delivery ratio. The queue management employs both the event successful delivery time and the event survival time to decide whether an event should be delivered or dropped for minimizing the transmission overhead. The effectiveness of CED is demonstrated through comprehensive simulation studies. View Full-Text

Keywords: event delivery; publish-subscribe; queue management; community event delivery; publish-subscribe; queue management; community





Author: Nianbo Liu, Ming Liu * , Jinqi Zhu and Haigang Gong

Source: http://mdpi.com/



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