Design and Implementation of Soft Handoff Support for SIP-NEMO

摘要

SIP-NEMO has previously been proposed in the literature as a NEtwork Mobility (NEMO) solution. However, the SIP-NEMO 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 SIP-NEMO 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.