Method and device for handover of packet switched service in wireless communication system

摘要

The present invention relates to a wireless communication system and, more specifically, to a method and device for handover of a packet switched (PS) service. A method for supporting handover of a PS service in a network according to one embodiment of the present invention comprises steps of: acquiring information for identifying a PS service handed over from a first access network to a second access network; and transmitting, to a user equipment, information for directing handover to the second access network for the identified PS service, wherein the information for the identified PS service can be maintained in a network node of the network until handover to the second access network has been completed.

主权项

1. A method for supporting handover of a packet switched (PS) service by a Mobility Management Entity (MME), in a network, comprising:
acquiring, by the MME, information for distinguishing a PS service subjected to handover when a Wireless Local Access Network (WLAN) is available and Internal Protocol (IP) traffic for the PS service is configured to prefer the WLAN; performing, by the MME, an operation for splitting bearers for the PS service to distinguish a bearer subjected to inter-radio access technology (inter-RAT) handover from a bearer subjected to handover to the WLAN; and transmitting, by the MME to a user equipment (UE), a UE context for the distinguished PS service, wherein the UE context for the distinguished PS service indicates the bearer subjected to handover to a WLAN by decreasing a quality of service (QoS) of the bearer subjected to handover to a WLAN, and wherein the UE context for the distinguished PS service is maintained in the MME until the handover is completed.