Invention Grant
- Patent Title: Avoiding formation of a call loop resulting from handling of a mobile terminated call in parallel with a location update in a wireless communication network
- Patent Title (中): 避免由无线通信网络中的位置更新并行处理移动终止的呼叫而形成呼叫循环
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Application No.: US14511261Application Date: 2014-10-10
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Publication No.: US09462458B2Publication Date: 2016-10-04
- Inventor: Lu Tian , Bruno Landais
- Applicant: Alcatel Lucent
- Applicant Address: FR Boulogne-Billancourt
- Assignee: Alcatel Lucent
- Current Assignee: Alcatel Lucent
- Current Assignee Address: FR Boulogne-Billancourt
- Agency: Tong, Rea, Bentley & Kim, LLC
- Main IPC: H04M1/00
- IPC: H04M1/00 ; H04W8/24 ; H04M3/54 ; H04W8/12 ; H04M1/725 ; H04W36/00

Abstract:
A call loop avoidance capability is provided for preventing formation of a call loop resulting from handling of a mobile terminated (MT) call in parallel with a location update for a mobile device (MD) in a wireless communication network. The call loop avoidance capability prevents formation of a call loop between an old mobility and call management entity (MCME) and a new MCME when delivery of an MT call to an MD is performed while the MD is in the process of moving from the old MCME to the new MCME using a location update procedure. An enhanced call routing procedure supports direct delivery of the MT call from the new MCME to the MD (rather than delivery of the MT call by the new MCME to the MD via the old MCME) in order to prevent formation of a call loop between the old MCME and the new MCME.
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