MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATIONS IN WIRELESS LOCAL AREA NETWORKS AND WIRELESS TRANSMIT AND RECEIVE UNITS
First Claim
1. A method for use on a wireless transmit receive unit (WTRU), the method comprising:
- receiving a first message from an access point (AP) that comprises a beamformee capability element;
sending a second message to the AP that comprises a beamformer capability element; and
receiving, from the AP, a third message in response to the second message that indicates a group to which the WTRU is assigned, wherein the group is based on the beamformer capability element and the group indicates uplink (UL) transmission information to be used by the WTRU for UL transmissions.
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Accused Products
Abstract
WTRUs, access points (APs) and methods thereon are disclosed. A method on a WTRU may include receiving a message from an AP that comprises a beamformee capability element; sending a second message to the AP that comprises a beamformer capability element; and receiving, from the AP, a third message in response to the second message that indicates a group to which the WTRU is assigned. The group may be based on the beamformer capability element and the group may indicate UL transmission information to be used by the WTRU. A method on an AP may include determining a group for multiple WTRUs based on a received beamformer capability element. A method on a WTRU may include sending to an AP a message with a low overhead preamble for UL MU-MIMO. The low overhead preamble may include LTFs that enable the AP to distinguish the WTRU from other WTRUs.
215 Citations
24 Claims
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1. A method for use on a wireless transmit receive unit (WTRU), the method comprising:
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receiving a first message from an access point (AP) that comprises a beamformee capability element; sending a second message to the AP that comprises a beamformer capability element; and receiving, from the AP, a third message in response to the second message that indicates a group to which the WTRU is assigned, wherein the group is based on the beamformer capability element and the group indicates uplink (UL) transmission information to be used by the WTRU for UL transmissions. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for use on an access point (AP), the method comprising:
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sending a first message to one or more wireless transmit receive units (WTRUs) that comprises a beamformee capability element that indicates the AP is capable of very high throughput (VHT); receiving one or more second messages from the one or more WTRUs, wherein the one or more second messages each comprise a beamformer capability element; determining a group for each of the one or more WTRUs based at least partially on the beamformer capability element; and sending at least one third message that indicates the group to which each of the one or more WTRUs is assigned, wherein the group is based on the beamformer capability element and the group indicates uplink (UL) transmission information to be used by the WTRU for UL transmissions. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for use on a wireless transmit and receive unit (WTRU), the method comprising:
sending to an access point (AP) a first message with a low overhead preamble for uplink (UL) multiple user (MU) multiple input (MI) multiple output (MO), UL MU-MIMO. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for use on an access point (AP), the method comprising:
receiving from a wireless transmit and receive unit (WTRU) a first message with a low overhead preamble for uplink (UL) multiple user (MU) multiple input (MI) multiple output (MO), UL MU-MIMO. - View Dependent Claims (24)
Specification