SIP-based call session server and message-routing method
US8364828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2010 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/28
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and SIP-based Call Session Server for routing SIP messages. A Network and Transport layer receives an incoming SIP message and forwards it to one of a plurality of SIP message routing process instances in a SIP Message Routing Framework. The receiving SIP message routing process instance determines a Routing-Key based upon at least one header field in the incoming message, and based upon the Routing-Key, forwards the incoming message to a selected one of a plurality of Back-to-Back User Agent (B2BUA) instances in a Call Session Control Framework. The selected B2BUA instance creates an outgoing SIP message utilizing the Routing-Key to generate a From-Tag in an outgoing request message, or to generate a To-Tag in an outgoing response message, and then forwards the outgoing message to the Network and Transport layer, which transmits the outgoing message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.