Deviation based antenna control algorithm for an access point
AssigneeInterDigital Technology Corporation
InventorsAna Lucia Iacono, Kai Liu, Daniel Steinbach
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Abstract
An access point operating in a wireless communication network includes a smart antenna for generating directional antenna beams. A method for operating the access point includes communicating with a client station using a selected directional antenna beam, with the client station initially being in a stationary position. Signal to noise ratios of signals received from the client station within a time interval are measured. At least one variation metric of a mean of the measured signal to noise ratios within the time interval is determined. This at least one determined variation metric is compared to a threshold for determining if the client station is moving.
Claims28
A method for operating an access point in an 802.11 wireless communication network communicating with at least one client station, the access point comprising a smart antenna for generating a plurality of directional antenna beams, the method comprising:
- communicating with a client station using a selected directional antenna beam, with the client station initially being in a stationary position;
- measuring signal to noise ratios of signals received from the client station within a time interval;
- determining at least one variation metric of a mean of the measured signal to noise ratios within the time interval;
- and
- determining if the client station is moving by comparing the at least one determined variation metric to a threshold.
A method for operating an access point in a wireless communication network communicating with at least one client station, the access point comprising a smart antenna for generating a plurality of directional antenna beams and an omni-directional antenna beam, the method comprising:
- communicating with a client station using a selected directional antenna beam, with the client station initially being in a stationary position;
- measuring signal to noise ratios of signals received from the client station within a time interval;
- determining a plurality of variation metrics of a mean of the measured signal to noise ratios within the time interval;
- and
- comparing the plurality of determined variation metrics to a threshold for determining if the client station is moving, and if the plurality of determined variation metrics exceed the threshold for a second time interval, then selecting the omni-directional antenna beam.
An access point for operating in an a wireless communication network, and comprising:
- a smart antenna for generating a plurality of directional antenna beams;
- a transceiver coupled to said smart antenna for communicating with a client station using a selected directional antenna beam, and comprising a measurement unit for measuring signal to noise ratios of signals received from the client station, with the client station initially being in a stationary position;
- and
- a processor coupled to said transceiver for performing the following
- measuring signal to noise ratios of the signals received from the client station within a time interval,
- determining at least one variation metric of a mean of the measured signal to noise ratios within the time interval, and
- determining if the client station is moving by comparing the at least one determined variation metric to a threshold.
Dependencies are inferred from the claim text.