US Patent 7363037 Vertical handover control algorithm for WLAN and UMTS

Patent 7363037 was granted and assigned to National Chiao Tung University on April, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

National Chiao Tung University

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73630370

Patent Inventor Names

Chie Ming Chou0

Ching Yao Huang0

Date of Patent

April 22, 2008

Patent Application Number

112596610

Date Filed

October 26, 2005

Patent Primary Examiner

‌

Duc M. Nguyen

Patent abstract

In this invention, a novel vertical handover control algorithm, consisting of a throughput-based mapping function, QoS-based dynamic handover thresholds, and performance-based trigger timers, are proposed to resolve uncommon pilot problem, QoS requirements, and ping-pong effects, respectively. An analytic model based on a finite state machine is developed to evaluate the proposed algorithm in terms of the handover frequency and achievable throughput. A numerical analysis is also provided to further quantify the performance impacts.