SYSTEM AND METHOD FOR INDICATING CIRCUIT SWITCHED ACCESS AT IMS REGISTRATION Russian patent published in 2011 - IPC H04W8/06 H04W60/04 H04W88/10 H04L29/06

Abstract RU 2434364 C2

FIELD: information technology.

SUBSTANCE: in IP multimedia subsystem (IMS), IMS control channel protocol (ICCP) is used between user equipment (UE) and IMS control channel function (ICCF) and session initiated protocol (SIP) interface (between ICCF, call session control function and application server) to support the indication of circuit switched (CS) access using P-Access-Network-Information header. The indication can be used by a serving call session control function (S-CSCF) or application server (AS) for different purposes such as routing decision, charging, and presence.

EFFECT: providing IMS with information whether a user is registered during channel switched access or packet switched access.

14 cl, 20 dwg

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RU 2 434 364 C2

Authors

Nakada Kazukhiko

Keller Ral'F

Foti Dzhordzh

Dates

2011-11-20—Published

2007-03-30—Filed