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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 for real‐time services. In this paper, we focus on reducing the SIP‐NEMO handoff delay. We design a soft handoff mechanism for SIP‐NEMO and implement a test‐bed for it with soft handoff support. The experimental results indicate that our SIP‐NEMO with soft handoff support can effectively reduce the handoff disruption time from those of 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 so it can meet the delay requirements of real‐time multimedia applications.
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Yang et al. (2009) studied this question.
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