Associating a wireless station with an access point
First Claim
1. A method of associating a station to one of a plurality of access points in a wireless local area network (WLAN), the method comprising the steps of:
- (a) measuring a downlink signal quality of a message received in a signal from each of one or more access points;
(b) transmitting a test link request to each of the one or more access points;
(c) receiving a corresponding test link response for one or more of the test link requests, the test link response including an uplink signal quality to the corresponding access point;
(d) comparing the corresponding uplink and downlink signal qualities of the one or more access points; and
(e) selecting the one of the plurality of access points based on the comparison of step (e).
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Accused Products
Abstract
A station associates with an access point in a wireless local area network conforming to, e.g., an IEEE 802.11 standard. The station measures the signal-to-noise ratio (SNR) for the downlink from each of the access points sending either a beacon or a probe response, and forms a first list of access points in decreasing order of received downlink SNR. The station transmits a link test request to each access point to query the access point for the SNR of the link test request received at the corresponding access point. Access points respond to the link test request with corresponding link test responses containing the corresponding SNR. The station i) forms a second list of access points in decreasing order of received uplink SNR and ii) compares the first and second lists to determine which access point to associate with based on overall quality of the uplink and downlink channels.
46 Citations
22 Claims
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1. A method of associating a station to one of a plurality of access points in a wireless local area network (WLAN), the method comprising the steps of:
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(a) measuring a downlink signal quality of a message received in a signal from each of one or more access points;
(b) transmitting a test link request to each of the one or more access points;
(c) receiving a corresponding test link response for one or more of the test link requests, the test link response including an uplink signal quality to the corresponding access point;
(d) comparing the corresponding uplink and downlink signal qualities of the one or more access points; and
(e) selecting the one of the plurality of access points based on the comparison of step (e). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of associating a station to one of a plurality of access points in a wireless local area network (WLAN), the method comprising the steps of:
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(a) transmitting a test link request to each of the one or more access points;
(b) receiving a corresponding test link response for one or more of the test link requests, the test link response including an uplink signal quality to the corresponding access point;
(c) measuring a downlink signal quality of the corresponding access point for each test link response;
(d) comparing the corresponding uplink and downlink signal qualities of the one or more access points; and
(e) selecting the one of the plurality of access points based on the comparison of step (e).
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10. A method of associating a station to one of a plurality of access points in a wireless local area network (WLAN), the method comprising the steps of:
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(a) receiving, by an access point, a test link request from the station;
(b) measuring an uplink signal quality of the corresponding station for the test link request; and
(c) forming a test link response for the test link request, the test link response including the uplink signal quality to the corresponding access point. - View Dependent Claims (11)
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12. Apparatus for associating a station to one of a plurality of access points in a wireless local area network (WLAN), the apparatus comprising:
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a detector adapted to measure a downlink signal quality of a message received in a signal from each of one or more access points;
a transmitter adapted to transmit a test link request to each of the one or more access points;
a receiver adapted to receive a corresponding test link response for one or more of the test link requests, the test link response including an uplink signal quality to the corresponding access point;
a comparator adapted to compare the corresponding uplink and downlink signal qualities of the one or more access points; and
a selector adapted to select the one of the plurality of access points based on the comparison of the corresponding uplink and downlink signal qualities of the one or more access points. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. Apparatus for associating a station to one of a plurality of access points in a wireless local area network (WLAN), the apparatus comprising:
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a transmitter adapted to transmit a test link request to each of the one or more access points;
a receiver adapted to receive a corresponding test link response for one or more of the test link requests, the test link response including an uplink signal quality to the corresponding access point;
a detector adapted to measure a downlink signal quality of the corresponding access point for each test link response;
a comparator adapted to compare the corresponding uplink and downlink signal qualities of the one or more access points; and
a selector adapted to select the one of the plurality of access points based on the comparison of the uplink and downlink signal qualities of the one or more access points.
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21. Apparatus for associating a station to one of a plurality of access points in a wireless local area network (WLAN), the apparatus comprising the steps of:
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(a) a receiver adapted to receive, by an access point, a test link request from the station;
(b) a detector adapted to measure an uplink signal quality of the corresponding station for the test link request; and
(c) a processor adapted to form a test link response for the test link request, the test link response including the uplink signal quality to the corresponding access point. - View Dependent Claims (22)
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Specification