Patent · US Active

IP multimedia subsystem virtual call/session control functions

US8533340B2 · kind B2 · utility

3Cited by

9References

13Claims

0Family size

Assignee

AT&T Intellectual Property I, L.P. · US

Inventors

Mark A. Ratcliffe · Oakhurst, US
Gerald L. Hoover · Red Bank, US
Min Lu · Nanhu, CN

Key dates

Filing date	Apr 11, 2007
Grant date	Sep 10, 2013
Priority date	—
Expiry date	Sep 21, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04L67/1095
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Systems and methods provide virtual CSCFs in an IMS system. The Virtual CSCFs may be virtual S-CSCFs or virtual P-CSCFs. A master virtual CSCF may be used to distribute subscriber data and initial filter criteria to the virtual CSCFs in a group. Thus one of multiple servers may be used for processing call sessions for the same subscriber, thereby avoiding overloading a particular CSCF in an IMS system.

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