公开(公告)号：US20100085937A1

公开(公告)日：2010-04-08

申请号：US12276617

申请日：2008-11-24

申请人： Todd A Pressley ,  Kevin Stiles ,  Serdar Sahin

发明人： Todd A Pressley ,  Kevin Stiles ,  Serdar Sahin

IPC分类号： H04W36/00

CPC分类号： H04W8/06 ,  H04L65/1016 ,  H04L65/1073 ,  H04W8/26 ,  H04W80/10

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 Tel URI in the rejection message. The UE sends a second Registration message using the temporary Tel 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/VLR and performs an update location procedure with the visiting UE's home network.

摘要翻译： 一种用于使UE能够从不具有IMS基础设施的家庭网络漫游到基于被访问的基于IMS的网络的系统和方法。 访问UE向被访问网络中的智能漫游应用服务器（I-RAS）发送第一SIP注册消息，该第一SIP注册消息包括将UE标识为来自不具有IMS基础设施的归属网络的访问者的SIP URI。 I-RAS拒绝注册，但在拒绝消息中包含临时Tel URI。 UE使用临时Tel URI发送第二个注册消息，该临时Tel URI被转发给被访问的S-CSCF进行认证。 S-CSCF返回认证向量，UE使用该向量来计算加密参数，并与被访问的P-CSCF建立IPSEC连接。 然后，UE发送接受的第三注册消息，并且访问网络中的注册完成。 I-RAS充当伪访问MSC / VLR，并与访问UE的归属网络执行更新定位过程。