BACKOFF PROCEDURE FOR POST DOWNLINK SDMA OPERATION
First Claim
Patent Images
1. A method for wireless communications, comprising:
- determining a backoff value for each of a plurality of apparatuses to receive simultaneous transmissions, wherein the backoff values are determined, at least in part, based on a number of the apparatuses and wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting; and
transmitting the determined backoff values to the apparatuses.
1 Assignment
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Accused Products
Abstract
Certain aspects of the present disclosure relate to a technique for decreasing a probability of post-backoff collisions that occur during uplink transmissions from multiple user stations (STAs) following completion of downlink transmission from an access point to the STAs.
50 Citations
81 Claims
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1. A method for wireless communications, comprising:
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determining a backoff value for each of a plurality of apparatuses to receive simultaneous transmissions, wherein the backoff values are determined, at least in part, based on a number of the apparatuses and wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting; and transmitting the determined backoff values to the apparatuses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for wireless communications, comprising:
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a processing system configured to determine a backoff value for each of a plurality of apparatuses to receive simultaneous transmissions, wherein the backoff values are determined, at least in part, based on a number of the apparatuses and wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting; and a transmitter configured to transmit the determined backoff values to the apparatuses. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for wireless communications, comprising:
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means for determining a backoff value for each of a plurality of apparatuses to receive simultaneous transmissions, wherein the backoff values are determined, at least in part, based on a number of the apparatuses and wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting; and means for transmitting the determined backoff values to the apparatuses. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A computer-program product for wireless communications, comprising a computer-readable medium comprising instructions executable to:
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determine a backoff value for each of a plurality of apparatuses to receive simultaneous transmissions, wherein the backoff values are determined, at least in part, based on a number of the apparatuses and wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting; and transmit the determined backoff values to the apparatuses.
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26. An access point, comprising:
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at least one antenna; a processing system configured to determine a backoff value for each of a plurality of wireless nodes to receive simultaneous transmissions, wherein the backoff values are determined, at least in part, based on a number of the wireless nodes and wherein the backoff values indicate how long the wireless nodes should wait after receiving the simultaneous transmissions before transmitting; and a transmitter configured to transmit via the at least one antenna the determined backoff values to the wireless nodes.
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27. A method for wireless communications, comprising:
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receiving, at an apparatus of a plurality of apparatuses, a message transmitted from another apparatus to the apparatuses, the message comprising backoff values, wherein each backoff value is assigned to one of the apparatuses; and refraining from transmitting for a time period indicated by the backoff value assigned to the apparatus. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An apparatus for wireless communications, comprising:
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a receiver configured to receive, at the apparatus of a plurality of apparatuses, a message transmitted from another apparatus to the apparatuses, the message comprising backoff values, wherein each backoff value is assigned to one of the apparatuses; and a transmitter configured to refrain from transmitting for a time period indicated by the backoff value assigned to the apparatus. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. An apparatus for wireless communications, comprising:
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means for receiving, at the apparatus of a plurality of apparatuses, a message transmitted from another apparatus to the apparatuses, the message comprising backoff values, wherein each backoff value is assigned to one of the apparatuses; and means for refraining from transmitting for a time period indicated by the backoff value assigned to the apparatus. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A computer-program product for wireless communications, comprising a computer-readable medium comprising instructions executable to:
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receive, at an apparatus of a plurality of apparatuses, a message transmitted from another apparatus to the apparatuses, the message comprising backoff values, wherein each backoff value is assigned to one of the apparatuses; and refrain from transmitting for a time period indicated by the backoff value assigned to the apparatus.
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58. A wireless node, comprising:
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at least one antenna; a receiver configured to receive via the at least one antenna, at the wireless node of a plurality of wireless nodes, a message transmitted from an access point to the wireless nodes, the message comprising backoff values, wherein each backoff value is assigned to one of the wireless nodes; and a transmitter configured to refrain from transmitting for a time period indicated by the backoff value assigned to the wireless node.
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59. A method for wireless communications, comprising:
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transmitting a control message to each of a plurality of apparatuses to receive simultaneous transmissions; receiving an acknowledgement message from each of the apparatuses, wherein the acknowledgement messages were transmitted after receiving the control message at the apparatuses; and in response to the acknowledgement messages, transmitting, to the apparatuses, a backoff timing message with backoff values, wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting. - View Dependent Claims (60, 61, 62, 63, 64, 65)
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66. An apparatus for wireless communications, comprising:
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a transmitter configured to transmit a control message to each of a plurality of apparatuses to receive simultaneous transmissions; and a receiver configured to receive an acknowledgement message from each of the apparatuses, wherein the acknowledgement messages were transmitted after receiving the control message at the apparatuses, wherein the transmitter is also configured to transmit, to the apparatuses in response to the acknowledgement messages, a backoff timing message with backoff values, wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting. - View Dependent Claims (67, 68, 69, 70, 71, 72)
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73. An apparatus for wireless communications, comprising:
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means for transmitting a control message to each of a plurality of apparatuses to receive simultaneous transmissions; and means for receiving an acknowledgement message from each of the apparatuses, wherein the acknowledgement messages were transmitted after receiving the control message at the apparatuses, wherein the means for transmitting is further configured to transmit, to the apparatuses in response to the acknowledgement messages, a backoff timing message with backoff values, wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting. - View Dependent Claims (74, 75, 76, 77, 78, 79)
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80. A computer-program product for wireless communications, comprising a computer-readable medium comprising instructions executable to:
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transmit a control message to each of a plurality of apparatuses to receive simultaneous transmissions; receive an acknowledgement message from each of the apparatuses, wherein the acknowledgement messages were transmitted after receiving the control message at the apparatuses; and transmit, to the apparatuses in response to the acknowledgement messages, a backoff timing message with backoff values, wherein the backoff values indicate how long the apparatuses should wait after receiving the simultaneous transmissions before transmitting.
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81. An access point, comprising:
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at least one antenna; a transmitter configured to transmit via the at least one antenna a control message to each of a plurality of wireless nodes to receive simultaneous transmissions; and a receiver configured to receive via the at least one antenna an acknowledgement message from each of the wireless nodes, wherein the acknowledgement messages were transmitted after receiving the control message at the wireless nodes, wherein the transmitter is also configured to transmit, to the wireless nodes in response to the acknowledgement messages, a backoff timing message with backoff values, wherein the backoff values indicate how long the wireless nodes should wait after receiving the simultaneous transmissions before transmitting.
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Specification