An Enhanced CSN Anchored Mobility Management Based on IPv6

In WiMAX network, the Connectivity Service Network Anchored Mobility Management (CSNAMM) is the important portion of the MS mobility management. However,some problems exist in the current specifications for the host mobility management on IPv6. Some proper measures are proposed for solving the problems in this paper. The mechanism triggering the client mobile IP procedure in WiMAX network is inconsistent with that described in the mobile IPv6 specification.It is solved by updating the order of the message and the corresponding implementing method. By adding some new messages, the result status affirmance of binding update can be verified. The data integrity problem during Connectivity Service Network (CSN) handoff is solved by creating the new data path between the serving gateway and the target gateway before the handoff and then deleting the data path at proper time after handover. In the solutions, it is unnecessary to append the new entity, network element and module. And the proposed message sequence chart accords with the specifications of the WiMAX and the MIPv6.