无线电工程

天基网络要求卫星具有跨波束、跨卫星的移动性管理功能,而传统地面网络中的移动性管理协议MIPv4和MIPv6都无法同时支持单节点和子网的移动性。针对以上问题提出了一种基于IPv6的同时支持单节点和移动子网的移动性管理协议—S-MIPv6,该协议充分吸收了MIPv6、NEMO和PMIPv6协议的优点,采用基于网络的移动性管理架构,并根据卫星空间组网的特点优化了信令流程,降低了链路通信开销。同时对S-MIPv6协议的入网、域内和域间切换开销给出了理论分析,为后续S-MIPv6协议的实现和完善奠定了基础。

In the space-based network,the satellites are required to have the capability of inter-beam and inter-satellite mobility management functions,and in the traditional ground-based network,the mobility management protocols( i. e. MIPv4,MIPv6) are incapable to support simultaneously the mobility of nodes and networks. Based on this problem,this paper puts forward an IPv6-based mobility management protocol( S-MIPv6).S-MIPv6 adopts the design principles of MIPv6,NEMO and PMIPv6,and optimizes the signaling flow based on satellite networking characteristics for radio-link communication overhead reduction. The theoretical analysis is performed for the overhead of three core S-MIPv6 procedures: initial network access,intra-domain handover and inter-domain handover,which provides the guideline for the implementation and improvement of S-MIPv6.