Invention Grant
US08379597B2 Method for preventing ping-pong handover effect in mobile WiMAX networks
有权
防止移动WiMAX网络中乒乓切换效应的方法
- Patent Title: Method for preventing ping-pong handover effect in mobile WiMAX networks
- Patent Title (中): 防止移动WiMAX网络中乒乓切换效应的方法
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Application No.: US12341533Application Date: 2008-12-22
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Publication No.: US08379597B2Publication Date: 2013-02-19
- Inventor: Alessandro De Sanctis , Marco Rastelli , Daniele Tortora
- Applicant: Alessandro De Sanctis , Marco Rastelli , Daniele Tortora
- Applicant Address: IT Cassina de Pecchi FI Espoo
- Assignee: Nokia Siemens Networks S.p.A,Nokia Siemens Networks Oy
- Current Assignee: Nokia Siemens Networks S.p.A,Nokia Siemens Networks Oy
- Current Assignee Address: IT Cassina de Pecchi FI Espoo
- Agency: Staas & Halsey LLP
- Priority: EP07425814 20071221
- Main IPC: H04W4/00
- IPC: H04W4/00

Abstract:
To prevent a handover ping-pong effect between base-station in WiMAX-compliant networks, a priority level is assigned to the trigger causes for handover, and the prioritized causes are coded. Then codes are subdivided into a first class of unrestricted handovers and a second class of restricted handovers. The first class includes the highest priority handovers. The second class includes a subset of handovers with a high or normal priority intended for optimizing resources. Outside this subset the second class also includes handovers for power budget having a normal priority level. When an outgoing handover is decided, the actual serving BS permits or selectively suppresses the Handover Request to the target BS when the latter corresponds to the preceding serving BS for that mobile. The selection mechanism operates on the second class of restricted handovers, during a penalty time triggered by the occurrence of handover causes included in the second class subset.
Public/Granted literature
- US20090274118A1 METHOD FOR PREVENTING PIN-PONG HANDOVER EFFECT IN MOBILE WIMAX NETWORKS Public/Granted day:2009-11-05
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