A novel scheme for mobility management in heterogeneous wireless networks

In this paper, we present a mobility management scheme for real-timemultimedia sessions over heterogeneous wireless networks. Most approaches in the current literature use Mobile IP (MIP) or Session Initiation Protocol (SIP) to maintain real-time sessions during mobility. In this paper, we analyze MIP and SIP in terms of the mobility rate, packet loss and packet overheads in the user plane and propose a mechanism called PMRmachanism bywhich the network can choose the optimum protocol for mobility management. Weperform theanalysis for constant bit rate (CBR) as well as for variable bit rate (VBR) traffic. We R. Rajavelsamy (B) Samsung India Software Operations Private Ltd., Bagmane LakeView, Block ‘B’, Bagmane TechPark, C.V. Raman Nagar, Byrasandra, Bangalore, 560093, India e-mail: [email protected] S. Anand Stevens Institute of Technology, Hoboken, New Jersey, USA e-mail: [email protected] O. Song Samsung Electronics Company Ltd., Suwon City, KOREA e-mail: [email protected] S. Choi Samsung Electronics Company Ltd., Suwon City, KOREA e-mail: [email protected] showthat forCBRtraffic, theproposedPMRmechanism leads to 12–35% improvement in the system capacity, while for VBR traffic, capacity improvements ranging fromabout 35–50%canbeobtained. Our proposed approach and the analysis are applicable to handovers between different IP domains both in homogeneous as well as in heterogeneous wireless networks.