A cross-layer approach to timely responsive transmission under collection tree topology in wireless sensor network. (2015)

• Record Type: Journal Article
• Authors: Tang, Yu; Bu, Changqin; Fan, Aihua
• Is Part Of: International journal of sensor networks. Volume 18:Number 3/4(2015)
• Page Start: 182
• Page End: 192
• Publication Date: 2015
• Subjects: WSNs -- wireless sensor networks -- routing protocols -- real-time transmission -- packet loss control -- collection tree topology -- cross-layer approach -- average transmission time -- congestion control -- packet dropping policy -- simulation; Sensor networks -- Periodicals; 681.2
• Languages: English
• ISSNs: 1748-1279

Abstract

Collection tree protocol (CTP) provides a link quality-based routing schema for wireless sensor networks (WSNs) with a collection tree topology, under which the link quality is measured by throughput rather than transmission latency. Yet it is not appropriate for the applications that need to transmit packets in a timely manner. Furthermore, implementation of timely responsive service in WSNs demands real-time supports from both routing and transport control layer. In this paper, we propose a cross-layer approach in which the packets with transmission deadlines are routed via an average transmission time (ATT) protocol and the congestion control is imposed through a performance-differentiated packet dropping policy. Simulation experiments on the TinyOS platform show that ATT protocol outperforms CTP by reducing the transmission delay up to 17.7%, while maintains a slightly better transmission reliability measured by the packet loss rate. The proposed cross-layer approach presents a promising core feature of framework in delivering real-time service in WSNs.