Traffic control within an IP multimedia subsystem

US9426711B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Tobias Austrell · Ayacucho, PE
• Timo Forsman · Ayacucho, PE
• Annika Jonsson · Storfors, SE
• Jan Anders Tellinger · Alvesta, SE
• Marlene Yared · Dollard-Des-Ormeaux, CA

Key dates

• Filing date: May 26, 2011
• Grant date: Aug 23, 2016
• Expiry date: Sep 9, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L67/1001
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A method of handling traffic within an IP Multimedia Subsystem, IMS, network. The method comprises registering an IMS user with a first Serving Call Session Control Function, S-CSCF, of the IMS network. Subsequently, at the first S-CSCF, a decision is made or instruction received to transfer said user to an alternative, second S-CSCF within the IMS network. A notification is sent from said first S-CSCF to a further IMS node, the notification including an explicit instruction to select a second S-CSCF and, upon receipt of said notification at the further IMS node, an S-CSCF reselection initiated for the user in order to select a second S-CSCF.