Combined H.450.2 and SIP call transfer

• US 7,738,445 B2
• Filed: 09/28/2005
• Issued: 06/15/2010
• Est. Priority Date: 05/05/2005
• Status: Expired due to Fees

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Ibezim, James, Rupert, Amy, Samarasinghe, Harish
• Primary Examiner(s): Matar; Ahmad F
• Assistant Examiner(s): Asanbayev; Oleg
• Application Number:
  US11/237,019
• Publication Number:
  US 20060268754A1
• Time in Patent Office: 1,721 Days
• Field of Search: 370/351, 370/466, 370/467, 370/352
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1033 Signalling gateways
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1063 Application servers providing network services systems providing special services to telephonic subscribers H04M3/42
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04M 3/58 Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party substation line holding circuits H04M1/80

Abstract

A method for supporting advanced features in a core SIP network when the calling party is in a network operating with the H.323 protocol is disclosed. Specifically, after processing the calls by collecting information associated with the advanced features, a REFER message is sent by an application server to an ingress border element associated with the calling party. The ingress border element then sends an H.450.2 FACILITY message containing the information in the SIP REFER message to an application gateway associated with the calling party. Upon receiving a SETUP message from the application gateway, the ingress border element then translates that SETUP message into a SIP INVITE message to establish the call.

Claims

1. A method for providing a feature to a call in a SIP-based core network between a first user and a second user, said method comprising:

receiving by a call control element (CCE) a first INVITE message from an ingress border element, wherein said ingress border element interfaces an H.323 network with said SIP-based core network;

invoking an application server to provide at least one feature to said call;

invoking a media server to collect information associated with said feature from said first user;

receiving by said CCE a REFER message from said application server, said REFER message comprising said information collected by said media server;

sending said REFER message to said ingress border element;

receiving a second INVITE message by said CCE from said ingress border element;

determining by said CCE an address for a second user associated with an egress border element; and

sending said second INVITE message to said egress border element.