Method and apparatus for transmitting and receiving data in a MIMO system
DCFirst Claim
1. A wireless communication method, the method comprising:
- receiving, by a receiver, a Very High Throughput Signal A (VHT-SIG-A) field on an operating band, the operating band comprising a plurality of 20 MHz bands; and
receiving, by the receiver, a Very High Throughput Signal B (VHT-SIG-B) field on the operating band,wherein;
the VHT-SIG-A field is transmitted on each of the plurality of 20 MHz bands;
the VHT-SIG-B field comprises a first portion of bits, wherein the first portion of bits is repeated in the VHT-SIG-B field;
the first portion of bits comprises a length indicator; and
a first number of bits representing the length indicator when the operating band is 40 MHz is smaller than a second number of bits representing the length indicator when the operating band is equal to or larger than 80 MHz.
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Abstract
The present invention relates to a method and apparatus for transmitting and receiving data. A data transmission method from a sender terminal to a receiver terminal in a MIMO system using a variable frequency band according to one embodiment of the present invention comprises: repeatedly generating a signal field depending on a frequency band that is applied to the transmission of a data frame; generating a data field including the data; generating a data frame including the signal field and the data field; and transmitting the data frame to the receiver terminal. The present invention is advantageous in that a signal field which is transmitted together with the data being transmitted from the sender terminal to the receiver terminal in the MIMO system can be sent more efficiently.
17 Citations
44 Claims
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1. A wireless communication method, the method comprising:
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receiving, by a receiver, a Very High Throughput Signal A (VHT-SIG-A) field on an operating band, the operating band comprising a plurality of 20 MHz bands; and receiving, by the receiver, a Very High Throughput Signal B (VHT-SIG-B) field on the operating band, wherein; the VHT-SIG-A field is transmitted on each of the plurality of 20 MHz bands; the VHT-SIG-B field comprises a first portion of bits, wherein the first portion of bits is repeated in the VHT-SIG-B field; the first portion of bits comprises a length indicator; and a first number of bits representing the length indicator when the operating band is 40 MHz is smaller than a second number of bits representing the length indicator when the operating band is equal to or larger than 80 MHz. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless communication apparatus, comprising:
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a processor; and a memory operably coupled with the processor and storing instructions that, when executed by the processor, cause the wireless communication apparatus to; receive a Very High Throughput Signal A (VHT-SIG-A) field on an operating band, the operating band comprising a plurality of 20 MHz bands; receive a Very High Throughput Signal B (VHT-SIG-B) field on the operating band, wherein; the VHT-SIG-A field is transmitted on each of the plurality of 20 MHz bands; the VHT-SIG-B field comprises a first portion of bits, wherein the first portion of bits is repeated in the VHT-SIG-B field; the first portion of bits comprises a length indicator; and a first number of bits representing the length indicator when the operating band is 40 MHz is smaller than a second number of bits representing the length indicator when the operating band is equal to or larger than 80 MHz. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A wireless communication method, the method comprising:
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receiving a first control field on a first frequency band, a bandwidth of the first frequency band being a multiple of 20 MHz; and receiving a second control field on the first frequency band, wherein; the second control field comprises a first indicator indicating a length of user data, a reserved bit portion subsequent to the first indicator and a tail bit portion subsequent to the reserved bit portion; and a first number of bits representing the first indicator when the first frequency band is 40 MHz is smaller than a second number of bits representing the first indicator when the first frequency band is equal to or larger than 80 MHz. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A wireless communication device, comprising:
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a processor; and a memory operably coupled with the processor and storing program instructions that, when executed by the processor, cause the wireless communication device to; receive a first control field on a first frequency band, a bandwidth of the first frequency band being a multiple of 20 MHz; and receive a second control field on the first frequency band, wherein; the second control field comprises a first indicator indicating a length of user data, a reserved bit portion subsequent to the first indicator and a tail bit portion subsequent to the reserved bit portion, and a first number of bits representing the first indicator when the first frequency band is 40 MHz is smaller than a second number of bits representing the first indicator when the first frequency band is equal to or larger than 80 MHz. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A communication method in a wireless network, the method comprising:
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transmitting a first control field over a first frequency band, a bandwidth of the first frequency band being a multiple of 20 MHz; and transmitting a second control field over the first frequency band, wherein the second control field comprises a first indicator indicating a length of subsequent user data, a reserved bit portion subsequent to the first indicator and a tail bit portion subsequent to the reserved bit portion, and wherein a number of bits comprising the first indicator when the first frequency band is 40 MHz is smaller than a number of bits comprising the first indicator when the first frequency band is larger than 40 MHz. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A communication device, comprising:
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a processor; and a memory operably coupled with the processor and storing program instructions that, when executed by the processor, cause the communication device to; transmit a first control field over a first frequency band, a bandwidth of the first frequency band being a multiple of 20 MHz; and transmit a second control field over the first frequency band, wherein the second control field comprises a first indicator indicating a length of subsequent user data, a reserved bit portion subsequent to the first indicator and a tail bit portion subsequent to the reserved bit portion, and wherein a number of bits comprising the first indicator when the first frequency band is 40 MHz is smaller than a number of bits comprising the first indicator when the first frequency band is larger than 40 MHz. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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Specification