SRVCC切换过程优化方案

IMS layer of Service continuity, when a user terminal mobility event occurs, and these events for the IMS layer is not transparent when, IMS network provides a service, use the session switch mechanism to maintain the above-mentioned service continuity. SR-VCC solution that reflects the direction of network development can be as SAE / LTE widespread deployment of a smooth transition to full-IP networks, many operators are more SAE approved the deployment of a transition solution, is also a more complete solution. As the IMS side switching time may be more in length, will lead to switching process and the interruption of a longer period can not be made to meet the SA1 maximum disruption 300ms needs. This article focuses on analysis and description of SRVCC switching process, in particular the switch in the process of disruption.