Patent ID: 9037675
Filing Date: 2015-05-19
Classification: H04L

Abstract:
1. A method of performing inter-user equipment (UE) transfer (IUT) of a collaborative session including media flows and a control of the media flows by an Internet protocol (IP) multimedia subsystem (IMS) network in an IMS-based network system, the method comprising: receiving from a first UE a subscription message for requesting notification of state or capability information of another UE; transmitting to the first UE a subscription acceptance message in response to the subscription message; receiving from a second UE a control message comprising an IUT flag for indicating either IUT enablement for the collaborative session or disablement for the collaborative session, the IUT enablement indicating that the second UE is capable of performing the IUT and the IUT disablement indicating the second UE is incapable of performing the IUT; and determining whether to transmit a notification message comprising information on the second UE to the first UE, based on the IUT flag in the control message, wherein if the IUT flag in the control message indicates the IUT enablement for the collaborative session, the notification message comprising information on the second UE is transmitted to the first UE such that the first UE is capable of determining, based on the notification message, whether to transfer to the second UE some or all of the collaborative session which is proceeded with a remote party and includes the media flows and the control of the media flows, and wherein if the IUT flag in the control message indicates the IUT disablement for the media flows, the notification message comprising information on the second UE is not transmitted to the first UE.