Communication apparatus, communication method, and communication system
First Claim
1. A communication device, comprising:
- circuitry configured to;
generate a plurality of media access control (MAC) information fields that includes trigger information, whereinthe trigger information indicates that uplink frame transmission is permitted, andthe plurality of MAC information fields is addressed to respective communication devices of a plurality of communication devices;
transmit the plurality of MAC information fields at a downlink frame time to the plurality of communication devices; and
concurrently receive, at an uplink frame time Short Inter Frame Space (SIFS) after the downlink frame time, a plurality of response frames compliant with the trigger information sent from the respective communication devices of the plurality of communication devices, whereinthe circuitry is further configured to specify a common frame length for the plurality of response frames in conjunction with the indication of the uplink frame transmission in the trigger information, and a duration based on duration information for network allocation vector,the plurality of response frames has the common frame length, andthe plurality of response frames is within the duration.
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Abstract
Communication operations are optimally conducted by applying space-division multiple access in which wireless resources on a spatial axis are shared among a plurality of users. By applying an RD protocol to a communication system that conducts space-division multiple access, spatially multiplexed frames in a TXOP are made more efficient. By specifying a frame length for reverse direction frames with reverse direction permission information and having respective transmitters of reverse direction frames make their frame lengths uniform while respecting the specification, AGC operation stabilizes. Also, a transmit start time for reverse direction frames can be specified by reverse direction permission information, and respective transmitters of reverse direction frames can transmit frames at the same time while respecting the specification.
34 Citations
14 Claims
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1. A communication device, comprising:
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circuitry configured to; generate a plurality of media access control (MAC) information fields that includes trigger information, wherein the trigger information indicates that uplink frame transmission is permitted, and the plurality of MAC information fields is addressed to respective communication devices of a plurality of communication devices; transmit the plurality of MAC information fields at a downlink frame time to the plurality of communication devices; and concurrently receive, at an uplink frame time Short Inter Frame Space (SIFS) after the downlink frame time, a plurality of response frames compliant with the trigger information sent from the respective communication devices of the plurality of communication devices, wherein the circuitry is further configured to specify a common frame length for the plurality of response frames in conjunction with the indication of the uplink frame transmission in the trigger information, and a duration based on duration information for network allocation vector, the plurality of response frames has the common frame length, and the plurality of response frames is within the duration. - View Dependent Claims (2, 3)
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4. A communication device, comprising:
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circuitry configured to; receive, from an access point device, a plurality of Media Access Control (MAC) information fields addressed to the communication device; generate an uplink response frame based on the reception of the plurality of MAC information fields, wherein the uplink response frame has a common frame length specified by the access point device in trigger information, the plurality of MAC information fields includes the trigger information which indicates that uplink frame transmission is permitted, and the plurality of MAC information fields is sent at a downlink frame time; and concurrently transmit, with a plurality of communication devices that transmits respective uplink response frames, the uplink response frame Short Inter Frame Space (SIFS) after the downlink fame time, wherein the respective uplink response frames transmitted from the plurality of communication devices have the common frame length specified by the access point device in conjunction with the indication of the uplink frame transmission in the trigger information, and the respective uplink response frames are within a duration based on duration information specified by the access point device for network allocation vector. - View Dependent Claims (5, 6, 7)
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8. A communication method, comprising:
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in a communication device; generating a plurality of Media Access Control (MAC) information fields that includes trigger information, wherein the trigger information indicates that uplink frame transmission is permitted, and the plurality of MAC information fields is addressed to respective communication devices of a plurality of communication devices; transmitting the plurality of MAC information fields at a downlink frame time to the plurality of communication devices; and receiving, at an uplink frame time Short Inter Frame Space (SIFS) after the plurality downlink frame time, a plurality of response frames compliant with the trigger information sent from the respective communication devices of the plurality of communication devices, wherein the communication method further includes specifying a common frame length for the plurality of response frames in conjunction with the indication of the uplink frame transmission in the trigger information, and a duration based on duration information for network allocation vector, the plurality of response frames has the common frame length, and the plurality of response frames is within the duration. - View Dependent Claims (9, 10)
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11. A communication method, comprising:
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in a communication device; receiving, from an access point device, a plurality of Media Access Control (MAC) information fields addressed to the communication device; generating an uplink response frame that has a common frame length specified by the access point device in trigger information, wherein the generation of the uplink response frame is based on a reception of the plurality of MAC information fields addressed to the communication device, the plurality of MAC information fields includes the trigger information which indicates that uplink frame transmission is permitted, and the plurality of MAC information fields is sent at a downlink frame time; and transmitting, concurrently with a plurality of communication devices that transmits respective uplink response frames, the uplink response frame Short Inter Frame Space (SIFS) after the downlink frame time, wherein the respective uplink response frames transmitted from the plurality of communication devices have the common frame length specified by the access point device in conjunction with the indication of the uplink frame transmission in the trigger information, and the respective uplink response frames are within a duration based on duration information specified by the access point device for network allocation vector. - View Dependent Claims (12, 13, 14)
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Specification