Abstract
Network coding–based routing has been widely considered as a promising technology to improve the network throughput of wireless multihop network. However, existing network coding aware routings have the problem of failure decoding and usually neglect the transmission scheduling, which degrades the gain of network coding. In this article, a common network coding condition and traffic matching supported network coding aware routing is proposed for wireless multihop network. In this, common network coding condition is proposed to avoid the problem of failed decoding. In addition, traffic matching mechanism is presented to promote the occurrence of network coding. Besides, a coding and load aware routing metric, which jointly considers the network coding opportunity and node load, is designed to evaluate the discovered paths. Extensive simulations on NS2 demonstrate that CTNR increases the number of coding opportunities and network coding occurrence, and improves network throughput.
Highlights
Wireless multihop network[1] consists of nodes with wireless communication capability
The network coding conditions of existing network coding aware routings may lead to the undecodable problem of coded packets
The packets transmission scheduling is not considered in existing network coding aware routings which results in the loss of network coding occurrence
Summary
Wireless multihop network[1] consists of nodes with wireless communication capability. The coding opportunity architecture (COPE)[17] for wireless multihop network and classical coding topologies were proposed. To solve the problems of network coding condition and transmission scheduling in existing network coding aware routings, this article proposes common network coding condition and traffic matching supported network coding aware routing (CTNR) for wireless multihop network. CNCC can be applied to determine the network coding opportunity of general scenarios, for example, multiple flows with multiple coding nodes. The traffic matching mechanism (TMM) is presented to match the packets from different flows existing network coding opportunity, which increases the number of actual network coding occurrence. Simulation details and performance analysis are presented in ‘‘Simulations and performance analysis’’ section. ‘‘Conclusion’’ section concludes this article
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