Abstract
Wireless sensor nodes in wireless sensor networks are generally battery powered and it is usually hard to change their batteries. Therefore, energy saving has always been the basic critical problem of wireless sensor networks. In recent years, network coding has become a promising technology to improve network throughput, reduce transmission number, and save energy, which has great potential to solve the energy efficiency problem of wireless sensor networks. In addition, some network coding aware routings have been proposed. However, the network coding condition of existing network coding aware routings may experience the problem of false-coding effect in some scenarios, and usually neglect node energy, which greatly influences the energy efficiency performance. Therefore, existing network coding aware routings are not suitable for wireless sensor networks. This paper proposes network coding aware energy efficient routing (NAER) for wireless sensor networks. In NAER, universal network coding condition is presented and proved to avoid false-coding problem. Besides, combined with the coverage control and topology control mechanism at lower layer, cross layer coding opportunity discover mechanism is presented to increase coding opportunities. In addition, a network coding aware energy efficient routing metric (NERM) is presented, which takes coding opportunity, node energy, and link quality into account jointly. Simulation results demonstrate that NAER improves the accuracy of coding discovery mechanism, increases the number of coding opportunities, saves node’s energy consumption, and prolongs network lifetime.
Highlights
In past decades, wireless sensor networks (WSNs) [1, 2] have drawn great attention from research filed due to its potential in many important applications, e.g., hazardous environment monitoring, target tracking, biomedical health monitoring, and so on
The contribution of this paper includes: Analyzing the network coding failure problem in existing network coding aware routings, this paper proposes and proves universal sufficient and necessary network coding condition, to improve the accuracy of coding opportunity discovery; Based on cross layer technique, coding opportunity discovery combined with coverage control and topology control is presented to increase the number of potential coding opportunities
This paper proposes network coding aware energy efficient routing (NAER) for wireless sensor networks
Summary
Wireless sensor networks (WSNs) [1, 2] have drawn great attention from research filed due to its potential in many important applications, e.g., hazardous environment monitoring, target tracking, biomedical health monitoring, and so on. Sensor nodes in WSNs are generally powered by batteries, and it is usually hard for administrator to replace their batteries, due to the constraints of numerous number of nodes and the network deployment environment. The network coding in the wireless environment [11, 12] can make full use of the open characteristics of the wireless channel, reduce the number of data transmissions and improve the network throughput, which is very suitable for wireless sensor networks
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