Abstract
SIP-NEMO has previously been proposed in the literature as a NEtwork MObility (NEMO) solution. However, the SIPNEMO handoff delay has been shown to be more than 320 ms, which is intolerable to real-time services. In this paper,we focus on the SIP-NEMO and aim to reduce the handoff delay of SIP-NEMO. We design soft handoff mechanism for SIP-NEMO and implement a test-bed of SIP-NEMO with soft handoff support. Our experimental results indicate that our SIP-NEMO with soft handoff support can effectively lower down the handoff disruption time compared with SIPNEMO without soft handoff and MIPv4-NEMO with fast handover. Thus, our proposed soft handoff mechanism for SIP-NEMO can improve the handoff performance to meet the delay requirement of real-time multimedia applications. Copyright 2008 ACM.