6LoWPAN接入Internet中uNAT64机制的研究与实现

无线传感器网络与Internet的融合已成为当前的研究热点，然而基于6LoWPAN标准的无线传感器网络与Internet （IPv4）因网络层协议异构导致无法直接端到端通信。针对这一难题，提出了6LoWPAN传感网与Internet互通架构，并基于此设计了uNAT64协议转换机制，对6LoWPAN IPv6报文与Internet IPv4报文进行相互转换，旨在实现6LoWPAN与Internet的有效互通。测试结果表明，uNAT64机制实现了两种网络间的全IP通信，且具有良好的实时性和较高的吞吐量，有力地促进了Internet向物理世界延伸。

Research and Implementation of uNAT64 Mechanism in 6LoWPAN access Internet

Integration of wireless sensor networks and Internet is becoming a research hotspot,unfortunately,wire?less sensor networks based on 6LoWPAN cannot directly communicate with Internet by peer-to-peer because of the heterogeneity of network layer protocols. In order to solve this problem,an architecture interconnecting 6LoWPAN to Internet is proposed,furthermore,an IPv4-IPv6 protocol translation mechanism called uNAT64 is designed and implemented to perform the interconnection between 6LoWPAN and Internet by translating IPv6 packets of 6LoW?PAN to IPv4 packets of Internet and vice versa. Experimental results show that uNAT64 mechanism enables the all-IP communication with higher packet-translation rate,lower processing delay and higher throughput between the two networks mentioned above,which will provide a forceful impetus for extending Internet to physical world.