Suppressing CAMEL service invocation for diverting users

摘要

A method is provided for establishing a new communication leg of a communication session in an IP Multimedia Subsystem, IMS, network architecture that includes CAMEL services. The method enables IMS network nodes to selectively invoke or suppress invocation of CAMEL services based on signaling received in SIP requests.

主权项

1. A method for establishing a new communication leg of a communication session in an IP Multimedia Subsystem (IMS) network, the method comprising:
handling, at a first node executing terminating services for a user, a Session Initiation Protocol (SIP) request comprising instructions to set up said new communication leg originating at said user, said request being sent from a Call Session Control Function (CSCF) node to which said user has been allocated; said first node retrieving information relating to the terminating services and said establishment of said new communication leg from a data store by using a Customized Applications for Mobile Network Enhanced Logic (CAMEL) service; transmitting, a portion of said retrieved information, from said first node to said CSCF node, wherein said portion of information includes an indication as to whether the CAMEL service is to be invoked for originating services to set up said new communication leg; adding, in said CSCF node, said portion of information to at least one SIP request originating from said CSCF node and relating to said communication session; handling, at a second node executing the originating services for said user, an SIP request sent from said CSCF node, said request comprising instructions to set up the new communication leg and comprising said portion of information including the indication; and said second node selectively using the CAMEL service for establishing said new communication leg, based on the indication as to whether the CAMEL service is to be invoked at the second node.