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针对现有基于SIP的VoWLAN环境下漫游时延过长和漫游成功率不高的问题,本文提出了一种新的漫游管理服务器解决方案。此方案中由漫游控制服务器控制整个漫游过程,采用资源预申请和应用层预漫游以及对SIP_EYE的支持,减少漫游时延和提高漫游成功率,从而进一步减少漫游时延。通过网络仿真,证明了此方案在减少漫游时延和提高漫游成功率上的有效性和可行性,具有一定的实际应用价值。
Aiming at the problem of long roaming delay and poor success rate of roaming in the existing SIP-based VoWLAN environment, this paper proposes a new roaming management server solution. In this scheme, the roaming control server controls the whole roaming process, pre-application of resources and pre-roaming of the application layer, and supports SIP_EYE to reduce the roaming delay and improve the success rate of roaming so as to further reduce the roaming delay. Through the network simulation, this scheme is proved to be effective and feasible in reducing the roaming delay and improving the roaming success rate, and has certain practical application value.