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The growing demand for seamless invocation of different multimedia services from handheld devices anytime anywhere is the main driving force for drawing attention in the area of mobility management. Although Session Initiation Protocol (SIP) based mobility solution is very efficient for real-time services, Mobile IP is required to handle mobility of the mobile node (MN) at the network layer. We have extensively studied and explored some existing mobility management methods integrating the functionalities of Mobile IP and SIP in this paper. These schemes require support of IP encapsulation at the protocol stack of correspondent node (CN). To address the above problem, we have proposed in this paper, certain modification at the IP layer of Base Station (BS) that also reduces the bandwidth consumption. Moreover, service provisioning in a continuous way in public places like airport, university campus etc., requires to integrate some micro-mobility protocol with the existing mobility management methods to reduce the handoff disruption time in case of intradomain handoff. Thus, in this paper, we have proposed two new hybrid mobility management schemes that integrate two existing Mobile IP and SIP-based schemes where the proposed modification in the IP layer of BS is incorporated separately with the micro-mobility protocol Hierarchical Mobile IP (HMIP). The numerical results show that the integration of HMIP into the existing methods reduces both the signaling cost and the delay, mainly the active handoff disruption time. Simulation results on NS-2 demonstrate the performance improvement of the proposed mobility management schemes over the existing methods in terms of handoff delay.

Erratum to: Hybrid mobility management schemes integrating mobile IP and SIP for seamless invocation of services in All-IP network