SPACE DIVISION MULTIPLE ACCESS FOR WIRELESS LAN, AND CHANNEL ESTIMATION FOR THE SAME
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Accused Products
Abstract
Provided are space division multiple access for wireless local area network (WLAN), and channel estimation for the same. A frequency division multiple access technique and a space division multiple access technique based on competition are used together for channel access. The channel access method includes: a competition period for estimating channel characteristics for a plurality of stations and transmitting, to the plurality of stations, downlink schedule information or uplink schedule information based on the estimated channel characteristics; and a data transmission period for performing downlink transmission or uplink transmission with all or some of the plurality of stations in accordance with the downlink schedule information or the uplink schedule information.
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Citations
21 Claims
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1-11. -11. (canceled)
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12. A method of reporting a channel state for multiple input multiple output (MIMO) in a wireless local access network, the method comprising:
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broadcasting, by an initiating station, a channel request frame including an initiator field and a recipient set field, the initiator field indicating an address of the initiating station, the recipient set field including a plurality of subfields indicating a plurality of recipients to prepare a channel response frame, each of the plurality of subfields including a recipient field indicating an identifier of each recipient, wherein the plurality of recipients receive independent data streams simultaneously over same channel bandwidth; and sequentially receiving, by the initiating station, from each of the plurality of recipients, the channel response frame including the channel state for MIMO channel. - View Dependent Claims (13, 14, 15, 16)
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17. A wireless apparatus of reporting a channel state for multiple input multiple output (MIMO) in a wireless local access network, the wireless apparatus comprising a processor configured to:
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broadcast a channel request frame including an initiator field and a recipient set field, the initiator field indicating an address of the wireless apparatus, the recipient set field including a plurality of subfields indicating a plurality of recipients to prepare a channel response frame, each of the plurality of subfields including a recipient field indicating an identifier of each recipient, wherein the plurality of recipients receive independent data streams simultaneously over same channel bandwidth; and sequentially receive, from each of the plurality of recipients, the channel response frame including the channel state for MIMO channel. - View Dependent Claims (18, 19, 20, 21)
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Specification