METHOD AND DEVICE FOR SUPPORTING VOICE SERVICE IN WIRELESS COMMUNICATION SYSTEM

摘要

A method for supporting a voice service of a user equipment (UE) in a wireless communication system; and a Mobility Management Entity (MME) apparatus therefore. The method according to one embodiment includes transmitting an update location request (ULR) message to a home subscriber server (HSS); and transmitting a Notify Request message including a single radio voice call continuity (SRVCC) capability, when the MME determines that the SRVCC capability is changed. If the MME knows a homogeneity of support of an IMS voice over PS session in all TAs (Tracking areas) or all RAs (Routing Areas) related to the MME, the ULR message includes an information element. If the MME fails to know the homogeneity of support of the IMS voice over PS session due to a lack of information including Voice over IMS related capability information of the UE, the ULR message does not include the information element.

主权项

1. A method for supporting a voice service of a user equipment (UE) of a network in a wireless communication system, the method comprising:
transmitting an update location request (ULR) message to a home subscriber server (HSS) by a Mobility Management Entity (MME); and transmitting a Notify Request message including a single radio voice call continuity (SRVCC) capability to the HSS, when the MME determines that the SRVCC capability is changed, wherein if the MME knows a homogeneity of support of an IMS voice over PS session in all TAs (Tracking areas) or all RAs (Routing Areas) related to the MME, the ULR message includes a ‘Homogeneous Support of IMS Voice over PS Session’ information element, and wherein if the MME fails to know the homogeneity of support of the IMS voice over PS session due to a lack of information including Voice over IMS related capability information of the UE, the ULR message does not include the ‘Homogeneous Support of IMS Voice over PS Session’ information element.