# US 2015/0103748 A1 · Terminal, method and system for performing combination service using terminal capability version > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0103748 A1 - Document ID: US20150103748A1 - Status: Published application - Kind: A1 - Application number: 14/574,015 - Filed: 2014-12-17 - Published: 2015-04-16 - Earliest claimed: 2005-06-21 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jae-Seung SONG; Hyun-Sook KIM; Se-Hee LEE; Song-Rae CHO; Kyung-Ae YOON - Web page: https://patentgrep.com/patent/US20150103748A1 ## CPC - H04W 8/22: Processing or transfer of terminal data, e.g. status or physical capabilities - H04W 8/24: Transfer of terminal data - H04W 8/28: Number portability {; Network address portability} - H04W 76/12: Setup of transport tunnels - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 80/04: Network layer protocols, e.g. mobile IP [Internet Protocol] - H04W 80/10: adapted for {application} session management, e.g. SIP [Session Initiation Protocol] {(connection management H04W76/00; arrangements for session management H04L67/14)} - H04W 88/02: Terminal devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method and a terminal are described for providing a circuit switched (CS) service, a session initiation protocol (SIP)-based service, or a CSI service which is a combination of the CS service and an Internet Protocol (IP) multimedia subsystem (IMS) service. The terminal may receive a terminal capability version of at least one target terminal, and compare the received terminal capability version with a previously stored terminal capability version of the at least one target terminal. The terminal may send a message for requesting for terminal capability information of the at least one target terminal, if the received terminal capability version of the at least one target terminal is different from the previously stored terminal capability version of the at least one target terminal based on the comparison result. Otherwise, a CS or IMS process is implemented. ## Claims ### Claim 1 A terminal capable of providing a circuit switched (CS) service, a session initiation protocol (SIP)-based service, or a CSI service which is a combination of the CS service and an Internet Protocol (IP) multimedia subsystem (IMS) service, the terminal comprising: 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 request for terminal capability information of the at least one target terminal if the received terminal capability version of the at least one target terminal is different from the previously stored terminal capability version of the at least one target terminal based on the comparison result, wherein if the received terminal capability version of the at least one target terminal is the same as the previously stored terminal capability version of the at least one target terminal, then the controller proceeds with a CS or IMS process, wherein the terminal capability version identifies a version of capabilities of the at least one target terminal, wherein the terminal capability version is updated when the terminal capability information is changed, and wherein the terminal capability information includes at least one of: supported media format parameters, a Mobile Station International Subscriber Directory Number (MSISDN), a preferred Session Initiation Protocol (SIP) Uniform Resource Identifier (URI), or a supported Multimedia Message service (MMS) version. ### Claim 2 (depends on 1) The terminal of claim 1, wherein the supported media format parameters include at least one of supported codec types or supported media file formats. ### Claim 3 (depends on 1) The terminal of claim 1, wherein if the received terminal capability version of the at least one target terminal is the same as the previously stored terminal capability version of the at least one target terminal, then the controller proceeds with the CS or IMS process without requesting for terminal capability information of the at least one target terminal. ### Claim 4 (depends on 1) The terminal of claim 1, wherein the controller requests for the current terminal capability information of the at least one target terminal using an OPTIONS message. ### Claim 5 (depends on 1) The terminal of claim 1, wherein the controller receives the terminal capability version of the at least one target terminal from the at least one target terminal during a CS call set-up or an IMS session set-up. ### Claim 6 (depends on 1) The terminal of claim 1, wherein the terminal capability version of the at least one target terminal is a unique value generated based on at least the terminal capability information of the at least one target terminal. ### Claim 7 (depends on 1) The terminal of claim 1, wherein the at least one target terminal includes a second terminal and a third terminal for selectively exchanging their terminal capability information with the controller, and the third terminal is designated by the second terminal to communicate directly with the terminal based on forward function setting information. ### Claim 8 (depends on 7) The terminal of claim 7, wherein when the controller transmits a setup request message intended for the second terminal based on the forward function setting information, the third terminal receives the setup request and transmits a terminal capability version of the third terminal to the controller. ### Claim 9 (depends on 8) The terminal of claim 8, wherein the controller compares the received terminal capability version of the third terminal with a stored terminal capability version of the third terminal, and determines whether to request for terminal capability information of the third terminal based on the comparison result. ### Claim 10 (depends on 9) The terminal of claim 9, wherein the controller requests for the terminal capability information of the third terminal, if the received terminal capability version of the third terminal is different from the stored terminal capability version of the third terminal; and wherein the controller bypasses requesting for the terminal capability information, and proceeds with carrying out a requested service, if the received terminal capability version of the third terminal is the same as the stored terminal capability version of the third terminal. ### Claim 11 (depends on 1) The terminal of claim 1, wherein the terminal capability version of the at least one target terminal has a value in a user equipment (UE) capability version-XX (UCV-XX) form where XX is a 2-digit hexadecimal number. ### Claim 12 A method for providing a circuit switched (CS) service, a session initiation protocol (SIP)-based service, or a CSI service which is a combination of the CS service and an Internet Protocol (IP) multimedia subsystem (IMS) service, the method comprising: receiving, by a terminal, a terminal capability version of at least one target terminal; comparing, by the terminal, the received terminal capability version with a previously stored terminal capability version of the at least one target terminal; and sending a message for requesting for terminal capability information of the at least one target terminal from the at least one target terminal, if the received terminal capability version of the at least one target terminal is different from the previously stored terminal capability version of the at least one target terminal based on the comparison result, wherein if the received terminal capability version of the at least one target terminal is the same as the previously stored terminal capability version of the at least one target terminal, then the method proceeds with a CS or IMS process, wherein the terminal capability version identifies a version of capabilities of the at least one target terminal, wherein the terminal capability version is updated when the terminal capability information is changed, and wherein the terminal capability information includes at least one of: supported media format parameters, a Mobile Station International Subscriber Directory Number (MSISDN), a preferred Session Initiation Protocol (SIP) Uniform Resource Identifier (URI), or a supported Multimedia Message service (MMS) version.