Research On Routing Theory And Key Technologies In IPv6-based Network Mobility

MIPv6 is initially designed for mobility management of single node. With the development of information technology,information access mode has changed a lot.A group of mobile terminals moving as a unit can make a mobile network,such as personal area network(PAN),network on public transportation.This type of network is called Network Mobility(NEMO,or mobile subnet).A single mobile subnet can have only a mobile router and a single node.Furthermore,it can also be comprised by several mobile subnets interconnected or nested together and connects to IP backbone network by one or several mobile touters.Due to the complex topology of mobile subnet,it is very difficult to manage the mobility of every node,because it will waste too much wireless network resources. Then how to manage the complex mobility and set up effective routing scheme have become an important issue.Furthermore,with the development trend of heterogeneous network,how to realize the seamless handover and network integration have also attracted much interest.This paper focuses on MIPv6-based NEMO routing scheme and key technologies.The main innovation of this paper includes:1.Route optimization scheme of nested NEMO based on-extended neighbor advertisement message is proposed,host routes between mobile routers are setup and the routing efficiency is improved.This scheme is verified and analyzed through experimentation on our testbed.Data packets are transmitted through optimized path as designed in our scheme.2.Multiple-interfaced mobile router scheme is also proposed.Mobile router is equipped with WLAN,CDMA and GPRS network interfaces.Applications can switch smoothly between different interfaces.This scheme is also experimented and verified on our testbed,and the results indicate that three interfaces can be used effectively,and this scheme enables the development of mobile network.3.Based on the multiple-interfaced mobile router scheme,a network selection algorithm is proposed.Several key parameters are introduced into analysis, such as the one-way delay,hop along path.The real-time path parameters are carried in the extended binding update message.This algorithm aims to minimize the packet delivery delay.Analysis results indicate that the adaptive network selection algorithm can be adjusted adaptively,so users' requirements can be met more appropriately.4.A proxy MIPv6 network testbed is setup and the handover latency of mobile node is measured and analyzed.Results indicate that the layer 3 handover latency of MN under PMIPv6 network is about 0.143 second,much better than that of CMIPv6(2.277s).Thereafter we design an interaction scheme of CMIPv6 and PMIPv6 by querying AAA server to acquire the global mobility of NEMO.5.This paper includes 54 graphics,6 tables,and 108 references.