This paper firstly proposes a SIP-based mobile soft handoff method-BSIP.
论文提出了一种基于SIP的移动软切换方法BSIP。
By introducing an evaluating model, the proposed BSIP, HBSIP are analyzed in terms of signaling cost and data consumption, compared with the traditional mobile SIP.
通过引入一个计算模型，相比于传统的移动SIP协议，对提出的BSIP、HBSIP进行了信令消耗和数据消耗方面的比较。
It is shown that, as a result of adopting a more complex handoff control, BSIP will produce a larger signaling load. Due to the use of the hierarchical mechanism, HBSIP solves the problem well.
分析表明，BS IP由于采用了较为复杂的切换控制流程，产生的信令负载较大，而HBSIP采用的分层机制良好的解决了网络负载过大的问题。
It is shown that, as a result of adopting a more complex handoff control, BSIP will produce a larger signaling load. Due to the use of the hierarchical mechanism, HBSIP solves the problem well.
分析表明，BS IP由于采用了较为复杂的切换控制流程，产生的信令负载较大，而HBSIP采用的分层机制良好的解决了网络负载过大的问题。
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