US 2019/0319992 A1 · METHOD, RELATED APPARATUS, AND SYSTEM FOR RECOVERING CALLED SERVICE OF TERMINAL

Abstract

A method, a related apparatus, and a system for recovering a called service of a terminal are provided. The method includes: when a called request of a user terminal is received, querying an initial proxy-call session control function (P-CSCF) entity with which the user terminal currently registers; if it is detected that the initial P-CSCF is faulty, selecting an available P-CSCF and sending, to the available P-CSCF, a notification message that carries a redundancy identifier, where the redundancy identifier is used to instruct the available P-CSCF to trigger the user terminal to re-register with the P-CSCF; and when a registration complete message sent by the P-CSCF with which the user terminal re-registers is received, delivering the called request to the re-registered P-CSCF to bear a called service of the user terminal.

Claims20

Dependent claims

A method for recovering a called service of a user terminal, the method comprising:

receiving, by a serving call session control function (S-CSCF) entity, a called request of the user terminal;
determining, by the S-CSCF entity, an initial proxy call session control function (P-CSCF) entity with which the user terminal currently registers is faulty;
selecting, by the S-CSCF entity, an available P-CSCF entity for the user terminal;
notifying, by the S-CSCF entity, the available P-CSCF entity to trigger the user terminal to re-initiate an IP Multimedia Subsystem (IMS) registration;
delivering, by the S-CSCF entity, the called request to a re-registered P-CSCF entity of the user terminal after the user terminal completes the IMS registration;
and
sending, by the re-registered P-CSCF entity, the called request to the user terminal.

4 more elements

A system for recovering a called service of a user terminal, the system comprising:

a serving call session control function (S-CSCF) entity and a registered proxy call session control function (P-CSCF) entity, wherein the S-CSCF entity is configured to:
receive a called request of the user terminal;
determine an initial P-CSCF entity with which the user terminal currently registers is faulty;
select an available P-CSCF entity for the user terminal and notify the available P-CSCF entity to trigger the user terminal to re-initiate an IP Multimedia Subsystem (IMS) registration;
and
deliver the called request to the re-registered P-CSCF entity of the user terminal after the user terminal completes the IMS registration;
wherein the re-registered P-CSCF entity is configured to send the called request to the user terminal.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/455,749Filed 28 Jun 2019

Priority

CN 201310342761.07 Aug 2013

Published

17 Oct 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04L 41/0668
Using network fault recovery: by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
H04L 12/1407
Architecture for metering, charging or billing: policy-and-charging control [PCC] architecture
H04L 65/00
Network arrangements, protocols or services for supporting real-time applications in data packet
H04L 65/1016
Architectures or entities: iP multimedia subsystem [IMS]

Family

Application15/015,008Continuation · filed 3 Feb 2016

Application15/827,959Continuation · filed 30 Nov 2017

Application16/146,813Continuation · filed 28 Sep 2018

Application16/455,749Continuation

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