Abstract: The present invention provides a method and apparatus for initiating a user selected service, which makes use of a packet data connection, in conjunction with establishing the packet data connection. The method includes receiving a request to initiate a user selected service, which uses a packet data connection, prior to the establishment of the packet data connection. An activation request is then sent for establishing a packet data connection, the activation request includes user selected service parameters for use in defining a user selected service. The user selected service is then initiated as part of establishing the packet data connection. The apparatus includes a processor coupled to a user input for receiving a request to initiate a user selected service and a transceiver for communicating with a network. The processor includes a connection module adapted for establishing a packet data connection via the transceiver.

Abstract: Multimedia IMS communications are established by matching callee capabilities with caller preferences and identifying a URI parameter in response thereto. When a session initiation protocol (SIP) request identifying caller preferences for an internet communication session and an identified callee is received (602), a determination is made of whether the identified callee is a registered address of record (AOR) or not (604). If the identified callee is a registered AOR (604), a uniform resource identifier (URI) parameter and a globally routable user agent URI (GRUU) associated with callee capabilities are identified (608, 612, 614). The URI parameter is used to create a modified SIP including the URI parameter (616) for sending (618) to an IMS enabled wireless communication device (120).

Abstract: A method and apparatus for conducting a sidebar, subconference call from a multiparty conference call is provided. Once a party has joined a multiparty conference call, the party is able to initiate the subconference call by transmitting a session initiation protocol (SIP) command to a target party. Two SIP commands that may be employed to initiate the subconference call are the REFER command and the INVITE command. To allow the target party to distinguish between incoming communication requests related to the multiparty conference call from extraneous ones, the REFER or INVITE command includes at least one data field containing an identifier of the conference call referred the REFER or INVITE command. Once received and verified, the target party may respond accordingly to establish the subconference call. The target party's handset may reference data fields in the SIP command to those locally stored and known to be associated with the multiparty conference call.

Abstract: In the various embodiments of the present invention, a method of floor control in a PTX communications system comprises transmitting a floor control message via a floor control channel (905) wherein the floor control message consists of media designation fields (1003) for any possible requested media type. The media types preferred for the given requested PTX session are designated by populating the corresponding media type designators (1003) within the floor control message. The Real Time Control Protocol (RTCP) may be used for the floor control messaging channel and is independent from the requested media streams (217) which are typically Real-time Transport Protocol (RTP) media streams. Support may be provided for older mobiles that do not support each type of RTP media stream, but will still receive and interpret the RTCP floor control messaging, which in the embodiments of the present invention, is common for all media types.