Single-path Streaming Optimized Routing Protocol for Dense Wireless Sensor Networks

摘要

The Wireless Sensor Networks (WSNs) have advanced to the multimedia processing and streaming applications in therecent past with the advent of higher end motes like the iMote2. The data rates available from the radios of the WSNnodes are low so that for streaming applications to be sustained in these networks, special cares have to be taken to allowonly one streaming path in any node’s neighborhood, which means in a common sink network, all the protocol layers inthe nodes are optimized for maintaining a single streaming path in the network at any point of time. In a dense WSN, forsingle path optimized streaming for maximum throughput, the MAC and routing layers have to be specially designed toavoid traffic generation from nodes in the vicinity of an ongoing streaming path. In this paper, a routing protocol isdescribed which is built on top of a streaming MAC protocol called MLMAC. The Single-path Streaming OptimizedRouting Protocol (SPSORP) establishes the routing table during the initialization phase of the protocol and suspends theroute updates when streaming is detected in the vicinity of a node. The simulation in OMNeT++ simulator confirms thepossibility of streaming in a dense WSN with the combination of MLMAC and SPSORD to the tune of compressed voicestreaming rates with iMote2 hardware platform.