基于NAT64的6LoWPAN边缘路由器设计

Design of 6LoWPAN edge router based on NAT64

针对目前基于6Lo WPAN边缘路由器只适用与IPv6设备互联、网络报文传输复杂繁琐、边缘路由器映射表复杂且开销大等问题,引入IEEE 802.15.4地址概念对6Lo WPAN网络内报文交互方式与数据包格式进行优化,提出一种6Lo WPAN与IPv4协议转换机制和边缘路由器地址映射转换方法,设计出适合在8位单片机上运行的轻量级微系统,最后用Co AP协议来访问节点数据,验证系统,实现6Lo WPAN网络与IPv4,IPv6网络之间的通信。该方法实现了6Lo WPAN与IPv4网络互联通信,保留6Lo WAPN与IPv6网络通信的功能,同时提高了6Lo WPAN内网络的吞吐量,降低边缘路由器维护地址映射表的开销,提高了边缘路由器效率,有效降低6Lo WPAN网络传输数据时的功耗,提高节点生存时间。

In order to solve the problems of current 6Lo WPAN edge router only can communication with IPv6 equipment,network data packet transmission complex and the edge router complex mapping table consume valuable resources of single chip micyoco. so,introduce the concept of IEEE 802. 15. 4 address to optimize the packet format in 6Lo WPAN network. The conversion mechanism between 6Lo WPAN and IPv4 protocol,and the mapping method of edge router address are proposed. A lightweight system is designed for 8 bit single chip micyoco. Co AP（ constrained application protocol） protocol is used to access node data and verify the system to realize the communication between 6Lo WPAN network and IPv4 network. This method realizes the interconnection between 6Lo WPAN and IPv4,retains the functions of 6Lo WAPN and IPv6 network,and improves the throughput of6 Lo WPAN,and reduces the overhead of 6Lo WPAN network,increase efficiency of edge router,effectively reduce power consumption data transmission,prolong lifetime of node.