Abstract: A method for enhancing the capability grabbing peer device functionality in Session Initiation Protocol (SIP) is disclosed. The method includes associating a session originating from a first terminal (101) to a second terminal (102) with a session originating from the first terminal to third terminal (103) using a Session Initiation Protocol REFER operation (205). The Call-ID header of the first session and the ‘cgpd’ feature tag may be used in the REFER message to associate the first session Invite Delta with the third session. Session Description Protocol (SDP) is used for conveying media to be transferred synchronously to the third terminal.

Abstract: A method of forwarding a call based on media attributes of the call in a telecommunications network is disclosed. The call forwarding services includes call forwarding based on SDP attributes, media-based partial call forwarding and partial call forwarding to multiple destinations. The method comprises comparing parameters of SDP with call forwarding parameter of the user, obtaining a match between one of the SDP parameters and the call forwarding parameters, sending a REFER message in case of partial call forwarding, multiple REFER messages in case of partial call forwarding to multiple destinations to network of calling user, and forwarding the call to other terminals as specified in the call forwarding parameters. The call forwarding based on media attributes enables a served user to forward communications based on media attributes conveyed over SDP for an IMS/SIP user.

Abstract: A method is disclosed of providing a call completion service to a not registered or not available user (CCNReg):—sending (9-10) a SUBSCRIBE message, from the originating application server (AS1) to the terminating I-CSCF, —then sending (11) a Location Information Request (LIR), from the terminating I-CSCF towards the HSS, requesting information about the terminating S-CSCF (S-CSCF2),—then sending (12) a Location Info Answer (LIA) containing S-CSCF capabilities or/and name, from the HSS to the terminating I-CSCF,—then assigning (13) a S-CSCF, referred to as the terminating S-CSCF (S-CSCF2), and forwarding the SUBSCRIBE message to said the terminating S-CSCF (S-CSCF2),—then sending (14) a Server Assignment Request (SAR) from the terminating (S-CSCF2) to the HSS,—then sending (15) a Server Assignment Answer (SAA) containing second user's profile info, from the HSS to the terminating S-CSCF (S-CSCF2),—then, forwarding (16) the SUBSCRIBE message to the terminating application server (AS2), for requiring to handle

Abstract: A method of forwarding a call based on media attributes of the call in a telecommunications network is disclosed. The call forwarding services includes call forwarding based on SDP attributes, media-based partial call forwarding and partial call forwarding to multiple destinations. The method comprises comparing parameters of SDP with call forwarding parameter of the user, obtaining a match between one of the SDP parameters and the call forwarding parameters, sending a REFER message in case of partial call forwarding, multiple REFER messages in case of partial call forwarding to multiple destinations to network of calling user, and forwarding the call to other terminals as specified in the call forwarding parameters. The call forwarding based on media attributes enables a served user to forward communications based on media attributes conveyed over SDP for an IMS/SIP user.

Abstract: A method for enhancing the capability grabbing peer device functionality in Session Initiation Protocol (SIP) is disclosed. The method includes associating a session originating from a first terminal (101) to a second terminal (102) with a session originating from the first terminal to third terminal (103) using a Session Initiation Protocol REFER operation (205). The Call-ID header of the first session and the ‘cgpd’ feature tag may be used in the REFER message to associate the first session Invite Delta with the third session. Session Description Protocol (SDP) is used for conveying media to be transferred synchronously to the third terminal.

Abstract: A method is disclosed of providing a call completion service to a not registered or not available user (CCNReg): —sending (9-10) a SUBSCRIBE message, from the originating application server (AS1) to the terminating I-CSCF, —then sending (11) a Location Information Request (LIR), from the terminating I-CSCF towards the HSS, requesting information about the terminating S-CSCF (S-CSCF2), —then sending (12) a Location Info Answer (LIA) containing S-CSCF capabilities or/and name, from the HSS M to the terminating I-CSCF, —then assigning (13) a S-CSCF, referred to as the terminating S-CSCF (S-CSCF2), and forwarding the SUBSCRIBE message to said the terminating S-CSCF (S-CSCF2), —then sending (14) a Server Assignment Request (SAR) from the terminating (S-CSCF2) to the HSS, —then sending (15) a Server Assignment Answer (SAA) containing second user's profile info, from the HSS to the terminating S-CSCF (S-CSCF2), —then, forwarding (16) the SUBSCRIBE message to the terminating application server (AS2), for requiring to