Patent · US Active

Failure recovery in an IP multimedia subsystem network

US9258179B2 · kind B2 · utility

3Cited by

0References

50Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Hubert Przybysz · Stuvsta-Snättringe, SE
Timo Forsman · Ayacucho, PE
Germán Blanco · Leganés, ES
Lars Lövsén · Gothenburg, SE
Gunnar Rydnell · Mörbylånga, SE
Kaj Johansson · Timrå, SE

Key dates

Filing date	Apr 11, 2013
Grant date	Feb 9, 2016
Priority date	—
Expiry date	Aug 31, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04L69/40
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method is provided for facilitating recovery from the failure of a P-CSCF within an IP multimedia Subsystem network. A gateway, such as a GGSN, monitors signals arriving at the gateway from the P-CSCF and provides an indication if the monitored signals become unacceptable, for example because of an interruption in the signals. The gateway responds by signalling the unavailability of the P-CSCF to user equipment, which was associated with the P-CSCF during a previous registration with the IMS network. In response, for example, the user equipment affected by the failure may request re-registration with the IMS network using a different available P-CSCF.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.