发明授权
- 专利标题： Internet protocol multimedia subsystem emergency calls for roaming user equipments
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申请号： US17246796申请日： 2021-05-03
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公开(公告)号： US11917516B2公开(公告)日： 2024-02-27
- 发明人: Fredrik Lindholm , Ralf Keller , Susana Fernandez Alonso , Ivo Sedlacek
- 申请人： Telefonaktiebolaget LM Ericsson (publ)
- 申请人地址： SE Stockholm
- 专利权人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
- 当前专利权人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
- 当前专利权人地址： SE Stockholm
- 代理机构： Sage Patent Group
- 主分类号： H04W4/90
- IPC分类号： H04W4/90 ; H04W76/50 ; H04L65/1016 ; H04L65/1069 ; H04W60/00 ; H04L65/1073 ; H04L65/1104 ; H04M3/51 ; H04W80/10 ; H04W8/20 ; H04W92/02 ; H04W12/06 ; H04W12/72 ; H04L65/1045
摘要：
A method of operating a user equipment (“UE”) to handle an internet protocol multimedia subsystem (“IMS”) emergency call can include sending a session initiation protocol (“SIP”) REGISTER request relating to an emergency registration to a proxy call session control function (“P-CSCF”) of an IMS network. The method can further include, responsive to sending the SIP REGISTER request, receiving a response from the P-CSCF. The method can further include, responsive to receiving the response, performing an action based on the response.
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