Establishment of multimedia service sessions in mobile terminals

摘要

A multimedia service providing method in a telecommunication network is disclosed. In one embodiment, the method includes (a) communicating, at a message providing server, data with first and second mobile terminals in an Internet protocol (IP) based mobile communication network, (b) receiving, at a message providing server, a short message from the first mobile terminal, wherein the short message indicates that the first mobile terminal requests a multimedia service from the second mobile terminal, and wherein the short message comprises a predetermined header field to determine whether the message requests the multimedia service and (c) transmitting the short message to the second mobile terminal, wherein the transmitted short message is configured to control the second mobile terminal to set a packet data protocol (PDP) session, for performing the multimedia service, with the first mobile terminal.

主权项

1. A multimedia service providing method in a telecommunication network, the method comprising:
communicating, at a message providing server, data with first and second mobile terminals in an Internet protocol (IP) based mobile communication network, wherein a circuit call for voice call between the first mobile terminal and the second mobile terminal is connected; receiving, at the message providing server, a short message from the first mobile terminal, wherein the short message indicates that the first mobile terminal requests a multimedia service from the second mobile terminal, wherein the short message comprises a transport protocol data unit (TPDU) comprising a header field including a predetermined header value in at least one of a protocol identifier (PID) field and a tele-service identifier (TID), wherein the predetermined header value indicates that the message requests the multimedia service; transmitting, by the message providing server, the short message to the second mobile terminal; analyzing, by the second mobile terminal, the header field to determine whether the message requests the multimedia service; if the message requests the multimedia service, transmitting, by the second mobile terminal, a response short message to the first mobile terminal through the message providing server, wherein the response short message indicates whether the multimedia service is accepted or declined; if the response short message indicates accepting the multimedia service, checking, by the first mobile terminal and the second mobile terminal, whether to set a packet data protocol (PDP) session for performing the multimedia service; if the PDP session should be set, initiating, by the first mobile terminal and the second mobile terminal, a setting of the PDP session for performing the multimedia service by transmitting a PDP session requesting message to a packet data serving node (PDSN) of the telecommunication network, wherein the PDP session requesting message is transmitted by using a signal control message provided by a universal mobile telephony service (UMTS); and initiating, by the first mobile terminal and the second mobile terminal, a session initiation protocol (SIP) registration by transmitting an SIP registration requesting message to a call session control function (CSCF) of the telecommunication network.