公开(公告)号：US20160100337A1

公开(公告)日：2016-04-07

申请号：US14966461

申请日：2015-12-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaobo WU ,  Hai LIU ,  Daliang ZHANG ,  Xinyong WANG ,  Yaowei HAN

IPC: H04W36/00 ,  H04L29/06

CPC classification number: H04W36/0022 ,  H04L65/1096

Abstract: The embodiments of the present application discloses a circuit switched fallback method, a UE, an MSC, and an MME. The method includes: sending, by a UE to an MME, a request message for requesting to perform CSFB; receiving, by the UE, a switch command sent by an eNodeB; releasing or holding a default CS call of the UE after the UE switches to the CS domain according to the switch command, where the default CS call is generated by the UE according to the switch command; and by using an MSC, initiating, by the UE, a CS call or receiving a CS call. According to the circuit switched fallback method, the UE, the MSC, and the MME in the embodiments of the present application, circuit switched fallback can be implement in a manner of switching by a UE from a PS domain to a CS domain, and reduce a delay.

Abstract translation: 本申请的实施例公开了电路交换回退方法，UE，MSC和MME。 该方法包括：由UE向MME发送请求执行CSFB的请求消息; 由所述UE接收由eNodeB发送的切换命令; 根据切换命令在UE切换到CS域后，释放或保持UE的默认CS呼叫，其中UE根据切换命令生成默认CS呼叫; 并且通过使用MSC，由UE发起CS呼叫或接收CS呼叫。 根据电路交换回退方法，本申请实施例中的UE，MSC和MME可以以UE从PS域切换到CS域的方式实现电路交换回退，并且减少 延迟。