Uplink multi-user multiple input multiple output beamforming
First Claim
1. A method, comprising:
- prompting, at a first communication device, a plurality of second communication devices to transmit, to the first communication device, respective beamforming training packets as part of a procedure for developing respective transmit beamforming matrices for use by the plurality of second communication devices;
receiving, at the first communication device, the respective beamforming training packets as part of the procedure for developing the respective transmit beamforming matrices, the respective beamforming training packets having been transmitted by the plurality of second communication devices in response to the prompting;
generating, at the first communication device, respective beamforming feedback packets based on reception of the respective beamforming training packets;
transmitting, from the first communication device, the respective beamforming feedback packets as part of the procedure for developing the respective transmit beamforming matrices;
selecting, at the first communication device, a group of multiple second communication devices from among the plurality of second communication devices using channel information developed based on reception of the respective beamforming training packets, the group selected for simultaneous transmissions to the first communication device;
transmitting, with the first communication device, a synchronization signal to the group to prompt second communication devices in the group to simultaneously transmit to the first communication device at a particular time; and
receiving, with the first communication device, simultaneous transmissions from the group responsive to the synchronization signal, the simultaneous transmissions having been beamformed by second communication devices in the group using transmit beamforming matrices developed by the second communication devices in the group as part of the procedure for developing respective transmit beamforming matrices for use by the plurality of second communication devices.
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Accused Products
Abstract
As part of a beamforming training procedure, a first communication device transmits a beamforming training packet. The first device then receives a plurality of respective beamforming feedback packets from a plurality of second communication devices. The first device then uses the plurality of beamforming feedback packets to select a group of multiple communication devices from among the plurality of second communication devices, wherein the group is selected for simultaneous transmissions to the first communication device. The first device then transmits a synchronization signal to the group to prompt second communication devices in the group to simultaneously transmit to the first communication device at a particular time. The first device then receives simultaneous transmissions from the group responsive to the synchronization signal.
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Citations
25 Claims
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1. A method, comprising:
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prompting, at a first communication device, a plurality of second communication devices to transmit, to the first communication device, respective beamforming training packets as part of a procedure for developing respective transmit beamforming matrices for use by the plurality of second communication devices; receiving, at the first communication device, the respective beamforming training packets as part of the procedure for developing the respective transmit beamforming matrices, the respective beamforming training packets having been transmitted by the plurality of second communication devices in response to the prompting; generating, at the first communication device, respective beamforming feedback packets based on reception of the respective beamforming training packets; transmitting, from the first communication device, the respective beamforming feedback packets as part of the procedure for developing the respective transmit beamforming matrices; selecting, at the first communication device, a group of multiple second communication devices from among the plurality of second communication devices using channel information developed based on reception of the respective beamforming training packets, the group selected for simultaneous transmissions to the first communication device; transmitting, with the first communication device, a synchronization signal to the group to prompt second communication devices in the group to simultaneously transmit to the first communication device at a particular time; and receiving, with the first communication device, simultaneous transmissions from the group responsive to the synchronization signal, the simultaneous transmissions having been beamformed by second communication devices in the group using transmit beamforming matrices developed by the second communication devices in the group as part of the procedure for developing respective transmit beamforming matrices for use by the plurality of second communication devices. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
a network interface device of a first communication device, the network interface device having one or more integrated circuit devices configured to; prompt a plurality of second communication devices to transmit, to the first communication device, respective beamforming training packets as part of a procedure for developing respective transmit beamforming matrices for use by the plurality of second communication devices, receive the respective beamforming training packets transmitted by the plurality of second communication devices as part of the procedure for developing the respective transmit beamforming matrices and in response to the prompt, generate respective beamforming feedback packets based on reception of the respective beamforming training packets, transmit the respective beamforming feedback packets as part of the procedure for developing the respective transmit beamforming matrices, select a group of multiple second communication devices from among the plurality of second communication devices using channel information developed based on reception of the respective beamforming training packets, the group selected for simultaneous transmissions to the first communication device, transmit a synchronization signal to the group to prompt second communication devices in the group to simultaneously transmit to the first communication device at a particular time, and receive simultaneous transmissions from the group responsive to the synchronization signal, the simultaneous transmissions having been beamformed by second communication devices in the group using transmit beamforming matrices developed by the second communication devices in the group as part of the procedure for developing respective transmit beamforming matrices for use by the plurality of second communication devices. - View Dependent Claims (7, 8, 9, 10)
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11. An apparatus, comprising:
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a network interface device of a first communication device, the network interface device having one or more integrated circuit devices configured to; receive a prompt from a second communication device, the prompt for the first communication device to transmit a beamforming training packet to the second communication device as part of a beamforming training procedure for developing a transmit beamforming matrix for use by the first communication device when transmitting to the second communication device simultaneously with one or more third communication devices transmitting to the second communication device, in response to the prompt, transmit the beamforming training packet to the second communication device as part of the beamforming training procedure, receiving, from the second communication device, a beamforming feedback packet as part of the beamforming training procedure, generate a transmit beamforming matrix for use by the first communication device when transmitting to the second communication device simultaneously with the one or more third communication devices transmitting to the second communication device, receive a synchronization signal transmitted, by the second communication device, to a group of communication devices to prompt communication devices in the group to simultaneously transmit to the second communication device at a particular time, wherein the group comprises the first communication device and the one or more third communication devices, and transmit a data packet to the second communication device simultaneous with transmissions by the one or more third communication devices to the second communication device, wherein transmission of the data packet includes utilizing the transmit beamforming matrix, and transmission of the data packet and the transmissions by the one or more third communication devices are responsive to the synchronization signal. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus, comprising:
a network interface device of a first communication device, the network interface device having one or more integrated circuit devices configured to; transmit a beamforming training packet as part of a beamforming training procedure for developing a transmit beamforming matrix for use by the first communication device, receive a plurality of respective beamforming feedback packets from a plurality of second communication devices, the plurality of beamforming feedback packets being part of the beamforming training procedure for developing the transmit beamforming matrix for use by the first communication device, use the plurality of beamforming feedback packets to select a group of multiple communication devices from among the plurality of second communication devices, the group selected for simultaneous transmissions to the first communication device, transmit a synchronization signal to the group to prompt second communication devices in the group to simultaneously transmit to the first communication device at a particular time, and receive simultaneous transmissions from the group responsive to the synchronization signal. - View Dependent Claims (17, 18, 19, 20)
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21. An apparatus, comprising:
a network interface device of a first communication device, the network interface device having one or more integrated circuit devices configured to; receive a beamforming training packet transmitted by a second communication device as part of a beamforming training procedure for developing a first transmit beamforming matrix for use by the second communication device, generate a beamforming feedback packet based on reception of the beamforming training packet, transmit the beamforming feedback packet as part of the beamforming training procedure for developing the first transmit beamforming matrix for use by the second communication device, generate a second beamforming matrix for use by the first communication device when transmitting to the second communication device simultaneously with one or more third communication devices transmitting to the second communication device, receive a synchronization signal transmitted, by the second communication device, to a group of communication devices to prompt communication devices in the group to simultaneously transmit to the second communication device at a particular time, wherein the group comprises the first communication device and the one or more third communication devices, and transmit a data packet to the second communication device simultaneous with transmissions by the one or more third communication devices to the second communication device, wherein transmission of the data packet is responsive to the synchronization signal, and the network interface device utilizes the second beamforming matrix when transmitting the data packet. - View Dependent Claims (22, 23, 24, 25)
Specification