公开(公告)号：US11627168B2

公开(公告)日：2023-04-11

申请号：US17214540

申请日：2021-03-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： He Li ,  Jinzhou Ye ,  Ridong Xu ,  Biao Zhang ,  Shufeng Shi ,  Boqiang Luo

IPC: H04L65/1069 ,  H04L41/0668 ,  H04L65/1073 ,  H04L69/40 ,  H04L65/00 ,  H04L12/14 ,  H04L65/1016 ,  H04L43/10 ,  H04L41/0893 ,  H04L65/1046

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.

公开(公告)号：US20170289863A1

公开(公告)日：2017-10-05

申请号：US15629544

申请日：2017-06-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Biao Zhang ,  Boqiang Luo

IPC: H04W36/00 ,  H04W8/10

CPC classification number: H04W36/0022 ,  H04W8/10 ,  H04W8/30 ,  H04W24/04 ,  H04W36/0016 ,  H04W36/0083

Abstract: A troubleshooting method, apparatus, and system are provided, by which continuity of a voice service can be ensured and user experience can be improved. The method includes: receiving, by a second SCC AS after a first service centralization and continuity application server SCC AS becomes faulty, an identity that is of an access transfer control function ATCF device accessed by user equipment and that is sent by a home subscriber server HSS, where the second SCC AS is determined by a call session control function CSCF device after the CSCF device detects that the first SCC AS becomes faulty; sending an identity of the second SCC AS to the ATCF device according to the identity of the ATCF device; and receiving, by the second SCC AS, a handover request that is sent by the ATCF device according to the identity of the second SCC AS.