Invention Grant
- Patent Title: System and method of improving circuit-switched fallback performance
- Patent Title (中): 提高电路切换后备性能的系统和方法
-
Application No.: US13231759Application Date: 2011-09-13
-
Publication No.: US09386621B2Publication Date: 2016-07-05
- Inventor: Shyamal Ramachandran , Thomas Klingenbrunn
- Applicant: Shyamal Ramachandran , Thomas Klingenbrunn
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM INCORPORATED
- Current Assignee: QUALCOMM INCORPORATED
- Current Assignee Address: US CA San Diego
- Agency: Patterson & Sheridan, LLP
- Main IPC: H04W36/00
- IPC: H04W36/00 ; H04W76/02

Abstract:
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.
Public/Granted literature
- US20120064884A1 SYSTEM AND METHOD OF IMPROVING CIRCUIT-SWITCHED FALLBACK PERFORMANCE Public/Granted day:2012-03-15
Information query