MIMO search over multiple access points
First Claim
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1. A method for communication, comprising:
- arranging multiple access points in a wireless local area network (WLAN) to communicate over the air with a station in a multiple-input multiple-output (MIMO) configuration, wherein the access points are configured to communicate with the station over a common frequency channel and using a common basic service set identification (BSSID) for all the access points, and to communicate with an access manager over a communication medium linking the access points to the access manager;
measuring transmission quality, in alternation, between two or more of the access points and the station in a plurality of different MIMO states, each MIMO state characterized at least by a respective number of spatial streams to be transmitted in the state; and
responsively to the measured transmission quality, selecting one of the access points and one of the MIMO states to transmit data to the station by sending first messages over the communication medium from the access points to the access manager in order to report the measured transmission quality and sending second messages from the access manager to the access points to indicate the selected one of the access points and the selected one of the MIMO states.
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Abstract
A method for communication includes arranging multiple access points in a wireless local area network (WLAN) to communicate over the air with a station in a multiple-input multiple-output (MIMO) configuration. Transmission quality is measured, in alternation, between two or more of the access points and the station in a plurality of different MIMO states. Each MIMO state is characterized at least by a respective number of spatial streams to be transmitted in the state. Responsively to the measured transmission quality, one of the access points and one of the MIMO states are selected to transmit data to the station.
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Citations
12 Claims
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1. A method for communication, comprising:
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arranging multiple access points in a wireless local area network (WLAN) to communicate over the air with a station in a multiple-input multiple-output (MIMO) configuration, wherein the access points are configured to communicate with the station over a common frequency channel and using a common basic service set identification (BSSID) for all the access points, and to communicate with an access manager over a communication medium linking the access points to the access manager; measuring transmission quality, in alternation, between two or more of the access points and the station in a plurality of different MIMO states, each MIMO state characterized at least by a respective number of spatial streams to be transmitted in the state; and responsively to the measured transmission quality, selecting one of the access points and one of the MIMO states to transmit data to the station by sending first messages over the communication medium from the access points to the access manager in order to report the measured transmission quality and sending second messages from the access manager to the access points to indicate the selected one of the access points and the selected one of the MIMO states. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Communication apparatus, comprising:
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multiple access points, which are arranged in a wireless local area network (WLAN) to communicate over the air with a station in a multiple-input multiple-output (MIMO) configuration, wherein the access points are configured to communicate with the station over a common frequency channel and using a common basic service set identification (BSSID) for all the access points; and an access manager, which is linked to the access points by a communication medium and is operative to control the access points so as to cause the access points to measure transmission quality, in alternation, between two or more of the access points and the station in a plurality of different MIMO states, each MIMO state characterized at least by a respective number of spatial streams to be transmitted in the state and to report the measured transmission quality via the communication medium to the access manager, and responsively to the measured transmission quality, to select one of the access points and one of the MIMO states to transmit data to the station and to send messages over the communication medium so as to indicate the selected one of the access points and the selected one of the MIMO states. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification