Method and device for transferring data from wireless LAN to plurality of STAs
First Claim
1. A method of transmitting data to a plurality of stations (STAs) in a wireless local area network (LAN), the method comprising:
- generating, by an access point (AP), a physical layer protocol data unit (PPDU) comprising a plurality of sub-channel format PPDUs for the plurality of STAs,wherein the plurality of sub-channel format PPDUs are to be transmitted through a plurality of sub-channel bands,wherein each of the plurality of sub-channel format PPDUs comprises a signal field and at least one training field for multiple input multiple output (MIMO) channel estimation transmission,wherein the generating comprises determining, by the AP, the number of the at least one training field based on a maximum value of the number of spatial streams which are allocated to each frequency band in the plurality of sub-channel bands,wherein each sub-channel format PPDU has a same number of training fields for the MIMO channel estimation, andwherein the signal field indicates the number of the at least one training field so that plurality of STAs know the number of the at least one training field; and
transmitting, by the AP, the generated PPDU to the plurality of STAs.
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Abstract
Disclosed are a method and a device for transferring data from a wireless LAN to a plurality of stations (STAs). The method for transferring data from a wireless LAN to a plurality of STAs may comprise: a step in which an AP generates a MIMOOFDMA format PPDU; and a step in the AP transfers the MIMO-OFDMA format PPDU to the plurality of STAs, wherein the MIMO-OFDMA format PPDU comprises a plurality of sub-channel format PPDUs which are synchronized in time phase, and the plurality of sub-channel format PPDUs are transferred respectively to the plurality of STAs through a plurality of respective sub-channel bands, and the number of training fields for the MIMO transfer which are included in the respective plurality of subchannel format PPDUs can be the same.
9 Citations
10 Claims
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1. A method of transmitting data to a plurality of stations (STAs) in a wireless local area network (LAN), the method comprising:
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generating, by an access point (AP), a physical layer protocol data unit (PPDU) comprising a plurality of sub-channel format PPDUs for the plurality of STAs, wherein the plurality of sub-channel format PPDUs are to be transmitted through a plurality of sub-channel bands, wherein each of the plurality of sub-channel format PPDUs comprises a signal field and at least one training field for multiple input multiple output (MIMO) channel estimation transmission, wherein the generating comprises determining, by the AP, the number of the at least one training field based on a maximum value of the number of spatial streams which are allocated to each frequency band in the plurality of sub-channel bands, wherein each sub-channel format PPDU has a same number of training fields for the MIMO channel estimation, and wherein the signal field indicates the number of the at least one training field so that plurality of STAs know the number of the at least one training field; and transmitting, by the AP, the generated PPDU to the plurality of STAs. - View Dependent Claims (2, 3, 4, 5)
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6. An access point (AP) for transmitting data to a plurality of stations (STAs) in a wireless local area network (LAN), the AP comprising:
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a transceiver, including at least one antenna, transmitting and receiving a radio signal; and a processor operatively coupled to the transceiver, wherein the processor; generates a physical layer protocol data unit (PPDU) comprising a plurality of sub-channel format PPDUs for the plurality of STAs, wherein the plurality of sub-channel format PPDUs are to be transmitted through a plurality of sub-channel bands, wherein each of the plurality of sub-channel format PPDUs comprises a signal field and at least one training field for multiple input multiple output (MIMO) channel estimation, wherein the processor generates the PPDU by determining the number of the at least one training field is determined based on a maximum value of the number of spatial streams which are allocated to each frequency band in the plurality of sub-channel bands, wherein each sub-channel format PPDU has a same number of training fields for the MIMO channel estimation, wherein the signal field indicates the number of the at least one training field so that plurality of STAs know the number of the at least one training field; and controls the transceiver to transmit the generated PPDU to the plurality of STAs. - View Dependent Claims (7, 8, 9, 10)
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Specification