Browse Prior Art Database

Low Power Macrolayer for Wireless Communication

IP.com Disclosure Number: IPCOM000117924D
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Camp Jr, WO: AUTHOR [+3]

Abstract

Many current implementations of Wireless Local Area Networks (LAN) require that the receiver in the mobile unit always be on to continuously monitor the transmissions of the access point in order to know if a message will be sent to it. This greatly increases the current drain on the battery of the computer to which the receiver is attached.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 67% of the total text.

Low Power Macrolayer for Wireless Communication

      Many current implementations of Wireless Local Area Networks
(LAN) require that the receiver in the mobile unit always be on to
continuously monitor the transmissions of the access point in order
to know if a message will be sent to it.  This greatly increases the
current drain on the battery of the computer to which the receiver is
attached.

      In order to reduce the drain on the battery caused by the LAN
receiver, our invention creates a method by which the receiver can be
cycled off for a large fraction of the time.  In the most probable
implementation of our invention, the receiver uses an internal clock
that permits it to remain off until a time slightly in advance of
when the access point (base station) will be transmitting the message
that tells the mobile stations that this is the end of the hop
period, and that the next frequencies will be X, Y, etc..  Normally,
the receiver just tunes to the next hop frequency and continues to
listen.  Our invention is the inclusion in this final message of the
hop period, a flag for each of the mobile stations to which it is
communicating with, which when set tells that mobile station that it
should remain on during the next hop period as it will need to
receive a message, and when the flag is reset tells that mobile
station that it can turn its receiver off until the end of the next
hop period for the final message, at which point the process repeats.

    ...