Abstract: A call connection method is provided. When a terminal is in an IMS unregistered state, information indicating whether to perform a session transfer toward a CS domain is stored in a server during a registration or deregistration process. When receiving a call connection request message over an IMS, if the terminal is in the IMS unregistered state and the information indicates the session transfer, the call transfer toward the CS domain can be performed.

Abstract: A terminal, method and system for providing a CS service, a SIP-based service, or a CSI service, are provided. According to an embodiment, the terminal includes a controller to receive a terminal capability version of at least one target terminal, to compare the received terminal capability version with a previously stored terminal capability version of the at least one target terminal, and to determine whether to request for terminal capability information of the at least one target terminal based on the comparison result, wherein the terminal capability version identifies a version of capabilities of the at least one target terminal.

Abstract: A method, terminal and server for controlling a domain transfer operation, are discussed. According to an embodiment, the method includes receiving, by a terminal, a domain transfer request from a network server, the domain transfer request including domain transfer related information; evaluating, by the terminal, the domain transfer related information when deciding whether or not to initiate a domain transfer; determining, by the terminal, whether to initiate the domain transfer of an ongoing call based on the evaluation result; and initiating, by the terminal, the domain transfer of the ongoing call when the evaluated domain transfer related information indicates that the domain transfer of the ongoing call needs to be initiated, wherein the domain transfer is for voice call continuity that is capable of transferring voice calls between a circuit switched (CS) domain and an (IMS) domain.

Abstract: A call connection method is provided. When a terminal is in an IMS unregistered state, information indicating whether to perform a session transfer toward a CS domain is stored in a server during a registration or deregistration process. When receiving a call connection request message over an IMS, if the terminal is in the IMS unregistered state and the information indicates the session transfer, the call transfer toward the CS domain can be performed.

Abstract: A method and device for updating a session in a terminal. The method includes: performing one or more services with one or more entities; and transmitting, to a management server, a capability information update message, including information about one or more changed capabilities, when one or more capabilities change, in order to notify the one or more entities of the one or more changed capabilities. The information about the one or more changed capabilities comprises a parameter indicating a version of the information about the one or more changed capabilities. The method further includes updating a session with the one or more entities by using the information about the one or more changed capabilities.

Abstract: A method and system for notifying updating of terminal capability information for a combination service for simultaneously performing two or more services between first and second users are disclosed. Each terminal recognizes whether or not its terminal capability information has been updated to inform the other terminal accordingly when the first service for the combination service is connected. When a terminal, which has received update indication information informing that the terminal capability information has been updated, request and obtains the updated terminal capability information from the other terminal.

Abstract: A method and mobile terminal for controlling a voice call continuity (VCC) operation, are provided. According to an embodiment, the invention is directed to a method for controlling a voice call continuity (VCC) operation between a mobile terminal and a network, the method comprising: receiving operator policy via an OMA Device Management (DM) method during at least one call or session established between the mobile terminal and the network, the operator policy including domain transfer restriction information; evaluating the domain transfer restriction information of the operator policy; and selectively initiating a domain transfer according to the evaluated domain transfer restriction information of the operator policy, wherein the domain transfer restriction information indicates that a domain transfer from CS domain to IMS domain is restricted or not or a domain transfer from IMS domain to CS domain is restricted or not.

Abstract: A method, terminal and system for controlling VCC functions are discussed. According to an embodiment, the terminal includes a controller to generate a register message including VCC capability information of the terminal, a transmitting unit to transmit the register message including the VCC capability information to the first network server, and a receiving unit to receive a response message to the register message from the first network server, the response message selectively including the VCC capability information.

Abstract: A system and method for changing a value of a talk burst control timer, are provided. According to an embodiment, there is provided a method of controlling talk burst timer operations for a terminal that communicates with a network, the method performed by the network and comprising: receiving at least one talk burst request from the terminal; and sending, to the terminal, at least one time value for at least one talk burst control timer of the terminal, wherein the time value is decided with consideration of network environment information, and wherein the time value is sent by using a device management (DM) provisioning method.

Abstract: A method, terminal and server for controlling a domain transfer operation, are discussed. According to an embodiment, the method includes receiving, by a terminal, a domain transfer request message from a network server, the domain transfer request message including domain transfer related information; evaluating, by the terminal, the domain transfer related information and at least one of user preference information and operator policy information; determining, by the terminal, whether to initiate a domain transfer of an ongoing call based on the evaluation result; and selectively initiating, by the terminal, the domain transfer of the ongoing call based on the determination result.

Abstract: A method, server and terminal for providing a Voice Call Continuity (VCC) service, are discussed. According to an embodiment, the terminal includes a storage unit to store operator policy information and user preference information, the user preference information including domain selection information specifying a user-preferred domain to be used when originating the outgoing call from the terminal, the operator policy information including domain selection information specifying a network-preferred domain to be used when originating the outgoing call from the terminal; and a controller to perform a domain selection for the outgoing call based on the user preference information or the operator policy information, depending on precedence information.

Abstract: Session invitation method and system in a PTx communication system are disclosed. For session invitation, an inviting terminal adds first media information corresponding to session information in an invitation message and transmits it or transmits it through an RTP. Then, the first media information received by an invited terminal is checked and an invitee determines whether to accept the invitation before joining the session. When the invitation is rejected, the invited terminal adds second media information corresponding to a reason for rejection in a reject message and transmits it, or transmits it through the RTP.

Abstract: Management of capability information is disclosed. A server in a network acquires information about capability of a user equipment (or terminal) and manages the information in a centralized manner, to reduce signaling through a radio interface between user equipments to thus reduce a waste of radio resources.

Abstract: A method for transmitting information in a wireless communication system and a wireless communication terminal supporting the method, wherein when an application server sends to a receiving terminal a specific message for checking radio environment information or a message including a radio environment capability, the receiving terminal having received the message may send a response message with its own radio environment information to the application server, such that the radio environment information related to the receiving terminal can be sent to the sending terminal after analyzed by the application server.

Abstract: A method, terminal and server for controlling a domain transfer operation, are discussed. According to an embodiment, the method includes receiving, by a terminal, a domain transfer request from a network server, the domain transfer request including domain transfer related information; evaluating, by the terminal, the domain transfer related information when deciding whether or not to initiate a domain transfer; determining, by the terminal, whether to initiate the domain transfer of an ongoing call based on the evaluation result; and initiating, by the terminal, the domain transfer of the ongoing call when the evaluated domain transfer related information indicates that the domain transfer of the ongoing call needs to be initiated, wherein the domain transfer is for voice call continuity that is capable of transferring voice calls between a circuit switched (CS) domain and an (IMS) domain.

Abstract: A method and mobile terminal for controlling a voice call continuity (VCC) operation, are provided. According to an embodiment, the invention is directed to a method for controlling a voice call continuity (VCC) operation between a mobile terminal and a network, the method comprising: receiving operator policy via an OMA Device Management (DM) method during at least one call or session established between the mobile terminal and the network, the operator policy including domain transfer restriction information; evaluating the domain transfer restriction information of the operator policy; and selectively initiating a domain transfer according to the evaluated domain transfer restriction information of the operator policy, wherein the domain transfer restriction information indicates that a domain transfer from CS domain to IMS domain is restricted or not or a domain transfer from IMS domain to CS domain is restricted or not.

Abstract: A method for handling CS (Circuit Switching) calls in a VCC (Voice Call Continuity), a VCC application server and an apparatus thereof, wherein first, the VCC application identifies whether a called party number of CS domain calls routed thereto is in an international format, secondly, the VCC application may request to convert the format of the called party number into the international format (referred to as ‘routable number’) if the called party number is not in the international format, thirdly, a translation entity may convert the called party number into the routable number by adding an international prefix suitable for a current location of the originating terminal based on both the called party number and location information on the originating terminal, and then the calls may continue in an IMS domain or a CS domain by the routable number.

Abstract: A method, terminal and server for controlling a domain transfer operation, are discussed. According to an embodiment, the server includes a receiver to receive a domain transfer request; a controller to evaluate the domain transfer request based on criteria information, to determine whether or not to generate a domain transfer request message based on the evaluation result, and to generate the domain transfer request message based on the determination result; and a transmitter to transmit the domain transfer request message to at least one terminal so as to selectively initiate a domain transfer for a call.

Abstract: A method and mobile terminal for controlling a voice call continuity (VCC) operation, are provided. According to an embodiment, the method includes receiving, by a terminal, a message from a network server, the message including domain transfer restriction information; checking, by the terminal, the domain transfer restriction information included in the received message; determining, by the terminal, whether or not to initiate a domain transfer based on at least the domain transfer restriction information; and selectively initiating, by the terminal, the domain transfer based on the determination result.

Abstract: A PT service system and method are provided. According to an embodiment, there is provided a client device comprising a PT (push-to) client to transmit a talk burst request message for requesting a permission to send a talk burst. The talk burst request message includes a timestamp which includes time information associated with the transmission of the talk burst request message.