Method and arrangement for reducing the number of handoff reques

Details Method and arrangement for reducing the number of handoff reques Method and arrangement for reducing the number of handoff reques

1993-07-19

1995-07-25

Kuntz, Curtis

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, 455 332, H04Q 722

Patent

active

054369568

ABSTRACT:
In order to effectively control a time interval of issuing a handoff request from a land site in a mobile communications system, a strength of a signal which is transmitted from a mobile unit located in a service area of said land site, is measured at the land side. A level crossing rate is measured based on the signal transmitted from the mobile unit. A first handoff request is generated if the signal strength falls below a predetermined handoff threshold. Following this, a timer is rendered active for counting an elapsed time after the first handoff request is generated. If the signal strength is detected below the predetermined handoff threshold, a time interval is determined based on the level crossing rate. The relationship between the time interval and the level crossing rate has been previously determined. Thereafter, a second handoff request is generated if the time interval determined in the above exceeds the elapsed time. subsequently, the timer is reset and then the above operations are repeated.

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Kanai, Take Tsugu, Kondo, "Experimental Digital Cellular System for Microcellular Handoff", IEEE, May 6, 1990.

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