Appeal No. 1997-1378
Application No. 08/065,328
station and a plurality of base stations, the base stations
having coverage areas referred to as communication cells.
More particularly, a handover procedure is provided for
transferring communication between one of the base stations
and another as the mobile station leaves the coverage area of
one cell and enters another. The mobile station monitors the
quality of beacon messages transmitted from a first base
station and, on determination of unacceptable quality, enters
a search mode in which the quality of beacon messages from
other base stations is determined.
Claim 1 is illustrative of the invention and reads as
follows:
Claim 1. A method of operating a wireless local area network
system having a plurality of base stations and a mobile
station, comprising the steps of:
transmitting beacon messages from the base stations at
regular intervals, each beacon message including an
identification of the respective base station transmitting
that message;
operating the mobile station in a normal mode wherein
beacon messages from a first base station only are monitored;
determining a communications quality value for the beacon
messages from the first base station;
determining if the communications quality value becomes
unacceptable, and if so, changing the operating mode of the
2
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