发明授权
- 专利标题: System and method of improving circuit-switched fallback performance
- 专利标题(中): 提高电路切换后备性能的系统和方法
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申请号: US13231759申请日: 2011-09-13
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公开(公告)号: US09386621B2公开(公告)日: 2016-07-05
- 发明人: Shyamal Ramachandran , Thomas Klingenbrunn
- 申请人: Shyamal Ramachandran , Thomas Klingenbrunn
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM INCORPORATED
- 当前专利权人: QUALCOMM INCORPORATED
- 当前专利权人地址: US CA San Diego
- 代理机构: Patterson & Sheridan, LLP
- 主分类号: H04W36/00
- IPC分类号: H04W36/00 ; H04W76/02
摘要:
Circuit-switched fallback (CSFB) is a technique to deliver voice-services to a mobile, when the mobile is camped in a long-term evolution (LTE) network. This may be required when the LTE network does not support voice services natively. If a user makes a mobile originating (MO) call, or receives a mobile terminating (MT) call, the UE may inform the LTE network that the UE is leaving for the call by initiating a call setup procedure. However, there may be instances where the call setup procedure may fail. If the call setup procedure was either not initiated, or was initiated but failed, the UE may determine to search for a suitable CS RAT/cell on its own without instructions/commands from the network. Therefore, certain aspects of the present disclosure provide techniques for the UE to find CS services based on information collected at the UE.
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