MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MU-MIMO) OPERATION AND USER SELECTION
First Claim
1. A method of wireless communication, said method comprising,at an initiator device comprising one or more antennas, informing a first group of responder devices of a Multi-User Multiple Input Multiple Output (MU-MIMO) Beamforming (BF) training session, wherein said informing comprises specifying a first set of TX sectors that comprise selected TX sectors of said one or more antennas;
- transmitting training data units to said first group of responder devices to initiate said MU-MIMO BF training session, wherein the training data units correspond to said first set of TX sectors and a first set of RX sectors comprising selected RX sectors of each of said first group of responder devices;
polling said first group of responder devices to collect feedback information resulting from said MU-MIMO BF training session;
based on said feedback information, arranging said first group of responder devices into one or multiple subsets; and
communicating respective MU-MIMO transmission configurations to said one or multiple subsets, wherein each MU-MIMO transmission configuration specifies a plurality of RX antenna sector and TX antenna sector pairs selected from said first set of TX sectors and said first set of RX sectors, wherein said plurality of RX sector and TX sector pairs are specified for simultaneous MIMO data transmission between a corresponding subset and said initiator device.
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Abstract
System and method of Multi-User Multiple-Input Multiple-Output (MU-MIMO) Beamforming communication. An MU-MIMO BF training session is used to train all the responders in a user group in relation to an initiator having multiple antenna arrays. Accordingly, suitable TX-RX sector pairs are selected based on the training results, and the user group is arranged into subsets such that the initiator can transmit data to the responders in one subset simultaneously by using mutually orthogonal BF waveforms. Prior to the MU-MIMO BF training session, the initiator can select TX sectors of the TX antennas and responders for the training session based on results from a prior or preliminary SISO BF training.
30 Citations
29 Claims
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1. A method of wireless communication, said method comprising,
at an initiator device comprising one or more antennas, informing a first group of responder devices of a Multi-User Multiple Input Multiple Output (MU-MIMO) Beamforming (BF) training session, wherein said informing comprises specifying a first set of TX sectors that comprise selected TX sectors of said one or more antennas; -
transmitting training data units to said first group of responder devices to initiate said MU-MIMO BF training session, wherein the training data units correspond to said first set of TX sectors and a first set of RX sectors comprising selected RX sectors of each of said first group of responder devices; polling said first group of responder devices to collect feedback information resulting from said MU-MIMO BF training session; based on said feedback information, arranging said first group of responder devices into one or multiple subsets; and communicating respective MU-MIMO transmission configurations to said one or multiple subsets, wherein each MU-MIMO transmission configuration specifies a plurality of RX antenna sector and TX antenna sector pairs selected from said first set of TX sectors and said first set of RX sectors, wherein said plurality of RX sector and TX sector pairs are specified for simultaneous MIMO data transmission between a corresponding subset and said initiator device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An initiator device comprising:
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a memory; a processor coupled to said memory; and a wireless communication interface coupled to said processor and comprising;
an antenna array comprising one or more antennas; and
a transceiver array coupled to said antenna array and comprising beamforming circuitry, andwherein said memory comprises instructions, that when executed by said processor, cause said initiator device to perform a method of; transmitting setup information to a first group of responder devices for a Multi-User Multiple Input Multiple Output (MU-MIMO) Beamforming (BF) training session, wherein said setup information comprises a first set of TX sectors comprising selected TX sectors of said antenna array for said MU-MIMO BF training session; transmitting training data units to said first group of responder device to initiate said MU-MIMO BF training session, wherein each training data unit specifies a first set of RX sectors corresponding to said first set of TX sectors for said MU-MIMO BF training session, and wherein said first set of RX sectors comprise selected RX sectors of each of said first group of responder devices; polling said first group of responder devices to collect feedback information resulting from said MU-MIMO BF training session; based on said feedback information, arranging said first group of responder devices into one or more subsets; and communicating respective MU-MIMO transmission configurations to said subsets, wherein each MU-MIMO transmission configuration specifies a plurality of RX sector and TX sector pairs selected from said first set of TX sectors and said first set of RX sectors, wherein plurality of RX sector and TX sector pairs are operable for simultaneous MIMO data transmission between a corresponding subset of responder devices and said initiator device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method of wireless communication, said method comprising:
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at a responder device, receiving setup information from an initiator device for a Multi-User Multiple Input Multiple Output (MU-MIMO) Beamforming (BF) training session, wherein said setup information specifies a first set of TX sectors comprising selected TX sectors of an antenna array of said indicator device for said MU-MIMO BF training session; in response to a training data unit transmitted from said initiator device, performing said MU-MIMO BF training session, wherein said training data unit specifies a first set of RX sectors corresponding to said first set of TX sectors for said MU-MIMO BF training session, and wherein said first set of RX sectors comprise selected RX sectors of each of a first group of responder devices, and wherein said first group of responder devices comprise said responder device; in response to a polling data unit from said initiator device, transmitting first feedback information resulting from said MU-MIMO BF training session to said initiator device; receiving a selection data unit from said initiator device, wherein said selection data unit comprises an MU-MIMO transmission configuration that specifies a plurality of RX sector and TX sector pairs selected from said first set of TX sectors and said first set of RX sectors, wherein said plurality of RX sector and TX sector pairs are operable for simultaneous MIMO data transmission between a subset of responder devices and said initiator device, wherein said subset of responder devices are selected from said first group of responder devices and comprise said responder device; and transmitting data with said initiator device in accordance with said MU-MIMO transmission configuration. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A responder device comprising:
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a memory; a processor coupled to said memory; and a wireless communication interface coupled to said processor and comprising;
an antenna array comprising one or more antennas; and
a transceiver array coupled to said antenna array, andwherein said memory comprises instructions, that when executed by said processor, cause said responder device to perform a method of; receiving setup information from an initiator device for a Multi-User Multiple Input Multiple Output (MU-MIMO) Beamforming (BF) training session, wherein said setup information specifies a first set of TX sectors comprising selected TX sectors of an antenna array of said initiator device for said MU-MIMO BF training; in response to a training data unit transmitted from said initiator device, performing said MU-MIMO BF training session, wherein said training data unit specifies a first set of RX sectors corresponding to said first set of TX sectors for said MU-MIMO BF training session, and wherein said first set of RX sectors comprise selected RX sectors of each of a first group of responder devices, and wherein said first group of responder devices comprises said responder device; in response to a polling data unit from said initiator device, transmitting first feedback information resulting from said MU-MIMO BF training session to said initiator device; receiving a selection data unit from said initiator device, wherein said selection data unit comprises an MU-MIMO transmission configuration that specifies a plurality of RX sector and TX sector pairs selected from said first set of TX sectors and said first set of RX sectors for simultaneous MIMO data transmission between a subset of responder devices and said initiator device, wherein said subset of responder devices are selected from said first group of responder devices and comprises said responder device; and transmitting data with said initiator device in accordance with said MU-MIMO transmission configuration. - View Dependent Claims (26, 27, 28, 29)
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Specification