CAMEL based Call Transfer for IN-VPN in GSM or UMTS Networks (CCT)
Original Publication Date: 2002-Jun-01
Included in the Prior Art Database: 2003-Jul-23
In order to enable a GSM or UMTS subscriber (B- Party) to use her mobile phone to connect a calling party (A-Party) to another party (C-Party) there is a core network solution called ETC (Explicit Call transfer) that is specified by the ETSI (European Technical Standards Institute) standard. However this solution does not work together with IN (Intelli- gent Network) services. A CAMEL (Customised Applications for Mobile network Enhanced Logic) based Call Transfer for IN-VPN (IN-Virtual Private Network) is proposed in order to establish a connection between A- and C- Party. Prior to transfer a connection shall have been established on the call between A and B. Using the supplementary service “Call Hold” the served sub- scriber (B-Party) sets up a second connection to the C-Party to ensure that the C-Party is reachable. The call (transfer) between A and C is established when the connections B to C and A to B are released by the B-party.