EHT Preamble Designs For Transmissions To Mixed Clients In Wireless Communications

Patent metadata

Field	Value
Publication number	US-2021258115-A1
Application number	US-202117164040-A
Country	US
Kind code	A1
Filing date	Feb 1, 2021
Priority date	Feb 18, 2020
Publication date	Aug 19, 2021
Grant date	—

Abstract

Various proposed schemes pertaining to extreme high-throughput (EHT) preamble designs for transmissions to mixed clients in wireless communications are described. In one example, an aggregated Physical Layer Convergence Procedure (PLCP) protocol data unit (PPDU), which is transmitted over a plurality of 80-MHz bandwidths with data for a plurality of stations (STAs), is received. A preamble of a specific one of the plurality of 80-MHz bandwidths is then decoded.

First claim

What is claimed is:

1 . A method, comprising:
receiving an aggregated Physical Layer Convergence Procedure (PLCP) protocol data unit (PPDU) which is transmitted over a plurality of 80-MHz bandwidths with data for a plurality of stations (STAs); and decoding a preamble of a specific one of the plurality of 80-MHz bandwidths.

2 . The method of claim 1 , wherein the aggregated PPDU contains data for STAs of at least two different generations.

3 . The method of claim 2 , wherein the aggregated PPDU comprises an extreme high-throughput (EHT) PPDU and a high-efficiency (HE) PPDU, wherein the EHT PPDU contains data for one or more EHT STAs, and wherein the HE PPDU contains data for one or more HE STAs.

4 . The method of claim 3 , wherein the HE PPDU comprises a primary 80-MHz bandwidth and a secondary 80-MHz bandwidth covering a 160-MHz bandwidth total in which same information is carried, and wherein the EHT PPDU comprises a third 80-MHz bandwidth and a fourth 80-MHz bandwidth each of which carrying respective information different from that carried in the other 80-MHz bandwidth of the EHT PPDU.

5 . The method of claim 3 , wherein, in each of the plurality of 80-MHz bandwidths, a LENGTH field in a legacy signal (L-SIG) field is used to differentiate the EHT PPDU and the HE PPDU.

6 . The method of claim 2 , wherein boundaries of orthogonal frequency-division multiplexing (OFDM) symbols of a plurality of fields and a plurality of content channels in the plurality of 80-MHz bandwidths are aligned in a time domain.

7 . The method of claim 1 , wherein, in each of the plurality of 80-MHz bandwidths, a universal signal (U-SIG) field is same for a plurality of content channels in the respective 80-MHz bandwidth.

8 . The method of claim 7 , wherein a first U-SIG field in a first 80-MHz bandwidth of the plurality of 80-MHz bandwidths and a second U-SIG field in a second 80-MHz bandwidth of the plurality of 80-MHz bandwidths are different.

9 . The method of claim 7 , wherein information on bandwidth and puncture is indicated in the U-SIG field, and wherein, in an event that bandwidth and puncture patterns are combined, the U-SIG field comprises six bits representing information on the bandwidth and puncture.

10 . The method of claim 7 , wherein the U-SIG field comprises a four-bit bitmap representing information on the puncture.

11 . The method of claim 1 , wherein the aggregated PPDU comprises a 160-MHz PPDU or a 320-MHz PPDU and is transmitted over two or four 80-MHz bandwidths, respectively.

12 . The method of claim 1 , wherein, in each of the plurality of 80-MHz bandwidths, an extreme high-throughput (EHT) signal (EHT-SIG) field contains information on resource unit (RU) allocation and modulation for one or more target STAs of the respective 80-MHz bandwidth.

13 . The method of claim 1 , wherein an extreme high-throughput (EHT) signal (EHT-SIG) field carries different contents for a plurality of content channels in each of the plurality of 80-MHz bandwidths or in each of a plurality of 160-MHz bandwidths.

14 . The method of claim 1 , wherein a plurality of content channels in each of the plurality of 80-MHz bandwidths are independently encoded or jointly encoded.

15 . The method of claim 1 , further comprising:
obtaining, via a subchannel selective transmission (SST) mechanism, information that identifies the specific one of the plurality of 80-MHz bandwidths before receiving the aggregated PPDU, wherein the decoding of the preamble comprises decoding the preamble of the specific one of the plurality of 80-MHz bandwidths based on the identifying information.

16 . A method, comprising:
generating an aggregated Physical Layer Convergence Procedure (PLCP) protocol data unit (PPDU); and transmitting the aggregated PPDU over a plurality of 80-MHz bandwidths with data for a plurality of stations (STAs), wherein the aggregated PPDU contains data for STAs of at least two different generations.

17 . The method of claim 16 , wherein the aggregated PPDU comprises an extreme high-throughput (EHT) PPDU and a high-efficiency (HE) PPDU, wherein the EHT PPDU contains data for one or more EHT STAs, wherein the HE PPDU contains data for one or more HE STAs, wherein boundaries of orthogonal frequency-division multiplexing (OFDM) symbols of a plurality of fields and a plurality of content channels in the plurality of 80-MHz bandwidths are aligned in a time domain, and wherein, in each of the plurality of 80-MHz bandwidths, a LENGTH field in a legacy signal (L-SIG) field is used to differentiate the EHT PPDU and the HE PPDU.

18 . The method of claim 16 , wherein, in each of the plurality of 80-MHz bandwidths, a universal signal (U-SIG) field is same for a plurality of content channels in the respective 80-MHz bandwidth, and wherein a first U-SIG field in a first 80-MHz bandwidth of the plurality of 80-MHz bandwidths and a second U-SIG field in a second 80-MHz bandwidth of the plurality of 80-MHz bandwidths are different.

19 . The method of claim 18 , wherein information on bandwidth and puncture is indicated in the U-SIG field, wherein the U-SIG field comprises a four-bit bitmap representing information on the puncture, wherein, in an event that bandwidth and puncture patterns are combined, the U-SIG field comprises six bits representing information on the bandwidth and puncture, wherein, in each of the plurality of 80-MHz bandwidths, an extreme high-throughput (EHT) signal (EHT-SIG) field contains information on resource unit (RU) allocation and modulation for one or more target STAs of the respective 80-MHz bandwidth, and wherein the EHT-SIG field carries different contents for the plurality of content channels in each of the plurality of 80-MHz bandwidths or in each of a plurality of 160-MHz bandwidths.

20 . The method of claim 16 , wherein the aggregated PPDU comprises a 160-MHz PPDU or a 320-MHz PPDU and is transmitted over two or four 80-MHz bandwidths, respectively, and wherein a plurality of content channels in each of the plurality of 80-MHz bandwidths are independently encoded or jointly encoded.

Assignees

• Mediatek Singapore Pte Ltd

Inventors

• Liu Jianhan
• Hsieh Hung-Tao
• Hu Shengquan

Classifications

• H04W28/06

  Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} · CPC title

• H04L5/0007 Primary

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L27/2602

  Signal structure · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title