Md. Ibrahim Chowdhury and Mohamad Iqbal MEE10:111, pp. 83. COM/School of Computing, 2010.
This thesis proposes a new solution approach for the simultaneous mobility issues in seamless handover for next generation wireless networks and envisages the vision of seamless roaming in IP mobility. Simultaneous mobility problem occurs while both of the communicating mobile nodes (MNs) change their location simultaneously and consequently losing their corresponding binding updates. There are two the key issues of simultaneous mobility, i.e., handover management and the location management. With this topic, it is presumed that simultaneous mobility problem needs to solve while simultaneous handover occurs. A new scheme is designed to minimize handover latency while simultaneous moving MNs traverse between two different networks. The multi-homing feature of Stream Control Transmission Protocol (SCTP) and dynamic address reconfiguration (DAR) extension of SCTP, i.e., mSCTP (mobile SCTP) are applied in the suggested solution to achieve improved seamlessness. A comprehensive and simulation based investigation of the phenomenon ‘Simultaneous Mobility’ along with ‘Simultaneous Handover’ for mSCTP has been examined. The obtained results show that mSCTP alone cannot provide solution for simultaneous mobility issues. Hence, we motivated to use an additional Location Server (LS) to ensure location management. In this paper, we proposed a new model of simultaneous mobility based on ‘step_length’ which offers an alternative solution for simultaneous mobility. Additionally, it is scrutinized that mSCTP with LS can solve the simultaneous mobility issues. The proposed scheme is implemented on NS2 (the Network Simulator) and performance comparison of proposed model are evaluated by measuring handover latency on the basis of LS. mSCTP with LS has improved performance in reducing handover latency as well as managing simultaneous mobility in seamless handover.