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Efficient Radio Environment Monitoring for Wireless Local Area Networks Using Radio Frequency Hopping

IP.com Disclosure Number: IPCOM000115011D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Bauchot, F: AUTHOR [+5]

Abstract

In a multi-cellular wireless local area network, each cell is 'controlled' by a base station which schedules the traffic of the wireless stations with in its range. In such a network, the wireless stations have first to establish an association with a base station, in order to register with the network. This registration procedure begins with a radio environment listening phase whose purpose is to get in synchronism with a base station within reception range: a candidate wireless station must first listen to its radio environment before selecting a base station and then registering with it. The present paper describes a radio environment listening scheme which allows to rapidly get in synchronism with the frequency hopping pattern of the base station.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 56% of the total text.

Efficient Radio Environment Monitoring for Wireless Local Area Networks
Using Radio Frequency Hopping

      In a multi-cellular wireless local area network, each cell is
'controlled' by a base station which schedules the traffic of the
wireless stations with in its range.  In such a network, the wireless
stations have first to establish an association with a base station,
in order to register with the network.  This registration procedure
begins with a radio environment listening phase whose purpose is to
get in synchronism with a base station within reception range: a
candidate wireless station must first listen to its radio environment
before selecting a base station and then registering with it.  The
present paper describes a radio environment listening scheme which
allows to rapidly get in synchronism with the frequency hopping
pattern of the base station.

      The method consists for the wireless station in hopping quicker
than the base station in order to over-pass it.  The ratio between
the wireless station hopping period and the base station hopping
period is called rel_rate.  For instance, assuming that rel_rate is
equal to 6 means that the wireless station listens for 6 different
frequencies while the base station remains on a single frequency.
Obviously, the base station must ensure that the channel is kept busy
at least once per wireless station frequency hop.  This assumption is
quite easy to fullfil: either there is some traffic exchanged over
...