发明名称 |
METHODS AND APPARATUSES FOR P-CSCF RESTORATION BASED ON UE CAPABILITIES |
摘要 |
The present invention faces the issue of UE enabled to communicate with an IP Multimedia Subsystem following protocol versions older than Release 9, and provides for an alternative P-CSCF restoration procedure. In this alternative P-CSCF restoration procedure, the UE submits to the IMS network UE capability information indicating that the UE is enabled to receive a list with one or more further available P-CSCF entities and to re-register in the IMS network with one of them; at least one entity of the IMS network stores this UE capability information; upon detecting unavailability of the P-CSCF entity to handle a terminating request towards the UE, the UE capability information is provided towards and access network entity; the access network entity determines based on the received UE capability information that the UE is enabled to receive a list with one or more further available P-CSCF entities, obtains the list with further available P-CSCF entities and submits said list to the UE; and the UE re-registers to a further P-CSCF entity selected from the list. |
申请公布号 |
US2015195864(A1) |
申请公布日期 |
2015.07.09 |
申请号 |
US201514593101 |
申请日期 |
2015.01.09 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
Bartolomé Rodrigo Maria Cruz;Fernandez Galmes Juan Manuel;Sedlacek Ivo |
分类号 |
H04W76/02;H04L29/06;H04W88/18;H04W76/06 |
主分类号 |
H04W76/02 |
代理机构 |
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代理人 |
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主权项 |
1. A method executed at a user equipment (UE) for Proxy Call Session Control Function (P-CSCF) restoration in an IP Multimedia Subsystem (IMS) network; the method comprising:
sending a register message to a P-CSCF entity, the register message initiating a registration procedure and comprising UE capability information indicating that the UE is enabled to receive a list with one or more further available P-CSCF entities and to re-register in the IMS network with one of them. |
地址 |
Stockholm SE |