发明名称 |
SYSTEM AND METHOD FOR INBOUND ROAMING IN IP MULTIMEDIA SUBSYSTEM NETWORKS |
摘要 |
A system and method for enabling a UE to roam to a visited IMS-based network from a home network that does not have an IMS infrastructure. A visiting UE sends to an Intelligent Roaming Application Server (I-RAS) in the visited network, a first SIP Registration message that includes a SIP URI identifying the UE as a visitor from a home network that does not have an IMS infrastructure. The I-RAS rejects the registration, but includes a temporary TeI URI in the rejection message. The UE sends a second Registration message using the temporary TeI URI, which is forwarded to a Visited S-CSCF for authentication. The S-CSCF returns authentication vectors, which the UE uses to compute ciphering parameters and establish an IPSEC connection with a Visited P-CSCF. The UE then sends a third Registration message, which is accepted, and registration in the visited network is complete. The I-RAS acts as a pseudo Visited MSC?/LR and performs an update location procedure with the visiting UE's home network. |
申请公布号 |
WO2010038144(A1) |
申请公布日期 |
2010.04.08 |
申请号 |
WO2009IB07013 |
申请日期 |
2009.09.30 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL);PRESLEY, TODD;STILES, KEVIN;SAHIN, SERDAR |
发明人 |
PRESLEY, TODD;STILES, KEVIN;SAHIN, SERDAR |
分类号 |
H04W8/06 |
主分类号 |
H04W8/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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