Osok Song

Abstract: A method and apparatus is provided for communication between a first terminal capable of using both a Circuit Switched (CS) call and an Internet Protocol Multimedia Subsystem (IMS) session, and a second terminal capable of using the IMS session, in a communication system supporting a Combined CS call and IMS session (CSI service). If the second terminal sends a Session Initiation Protocol (SIP) request (INVITE) message to originate a voice service or a multimedia service including the voice service with the first terminal, a CSI Application Server (AS) of an IMS domain managing the first terminal separates a voice service-related component included in the request message from a multimedia service-related component, and generates and sends first and second request messages to the first terminal. Upon receipt of first and second response messages corresponding to the first and second request messages from the first terminal, the CSI AS generates a combined response message and sends the combined response message to the second terminal.

TL;DR: An IMS reregistration method and a system for the same are provided to minimize the damage due to service interruption by enabling a user to seamlessly use a service even though a failure occurs in a P-CSCF(Proxy-Call Session Control Function) and making a provider speedily find out the failure and take an appropriate measure as mentioned in this paper.

TL;DR: In this article, a method for transmitting channel quality information in a wireless communication system and a device therefor are provided to select a mode for transmitting quality information according to the speed of a terminal divided into three levels or not to transmit the channel QI.

TL;DR: In this article, an access point sends an indication or message to a network entity to indicate whether the network entity is to perform access control for an access terminal, in some implementations the indication/message may comprise an explicit indication of whether or not that network entities are to perform the access control.

TL;DR: In this paper, the problem of interaction between paging optimization and synchronizing closed subscriber group (CSG) information is mitigated by setting a network indication indicating that a subscriber is no longer a member of a CSG, but the network has not yet received confirmation that an access terminal associated with the subscriber has been informed of this.