Soft handoff system, mobile terminal having the same, and...

Details Soft handoff system, mobile terminal having the same, and... Soft handoff system, mobile terminal having the same, and...

2005-09-28

2008-09-09

Beamer, Temica M (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S067130, C455S226200

Reexamination Certificate

active

07424297

ABSTRACT:
Disclosed are a soft handoff system, a soft handoff method, and a mobile terminal equipped with the soft handoff system. The soft handoff system for a mobile terminal analyzes periodically monitored wireless conditions of neighbor base stations, transmits a PSMM (Pilot Strength Measurement Message) to a current base station when a condition arises that needs reporting to the current base station, and performs handoff operation by allocating/releasing wireless resources to/from a suitable base station according to an HDM (Handoff Direction Message) received from the current base station, wherein upon receiving the HDM from the current base station, the system allows a handoff drop timer of an active base station belonging to an active set having a pilot channel signal strength less than a predetermined value to continue running rather than to be reset until the handoff drop timer expires.

REFERENCES:
patent: 6337983 (2002-01-01), Bonta et al.
patent: 6337984 (2002-01-01), Hong et al.
patent: 7054631 (2006-05-01), Tee
patent: 2006/0007862 (2006-01-01), Sayeedi et al.
patent: 2006/0256753 (2006-11-01), Chang
patent: 2007/0002799 (2007-01-01), Hunzinger

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