Design And Implementation Of A Mobility Management Scheme Based On Router Controller

The mobility management scheme based on IBGP router protocol achieves the routing update after handovers by sending IBGP update messages, which avoids the triangle routing problem.The scheme achieves distributed management by storing the redirect mobile node information through DNS. This scheme avoids the centralized problems, but brings other problems at the same time. Such as the route reflector may cause routing loops and routing conflicts; the access layer router introduces a number of data storage and management; a large number of mobile nodes will increase the size of the core layer routing table, which will reduce the processing performance of the system.Based on the studies of existing IBGP routing architecture and mobility management scheme, this thesis proposed a mobility management scheme based on routing controller in order to solve the above problems. This architecture optimizes the existing IBGP architecture, in which the router controller maintains the network topology information by sending routing update messages. Through this way the controller can control the router table and realize the function of mobile management.Moreover, we implement the above mobility management scheme in the NS-3simulation environment. The simulation results show that the scheme has a significantly lower handoff latency and packet loss rate compared with MIP and PMIP. The signaling overhead has decreased compared with the original architecture of IBGP and the persistent route oscillations are avoided. The new architecture is more suitable for mobility management, and the performance of the network architecture has less convergence time.