Data transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-11729032-B2
Application number	US-202117519405-A
Country	US
Kind code	B2
Filing date	Nov 4, 2021
Priority date	Sep 30, 2014
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A method includes generating a preamble for a protocol version of a wireless local area network, where the preamble includes a legacy signal (L-SIG) field and a high efficiency signal (HE-SIG) field that are arranged in order, the HE-SIG field includes a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol that are arranged in order, and an input information bit of the first OFDM symbol is the same as that of the second OFDM symbol, and sending the preamble to a receive end device, so that the receive end device restores the preamble, and when determining that input information bits obtained after restoring the first OFDM symbol and the second OFDM symbol are the same, determines that the preamble is the preamble of the protocol version.

First claim

The invention claimed is:

1. A non-transitory computer-readable storage medium storing a computer program for execution by a processor, the computer program including instructions for:
generating, in a wireless local area network, a preamble comprising a high efficiency signal (HE-SIG) field, wherein the HE-SIG field comprises at least two symbols comprising a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol, wherein input information bits of the first OFDM symbol are the same as input information bits of the second OFDM symbol, wherein the HE-SIG field further comprises a third OFDM symbol and a fourth OFDM symbol, and wherein input information bits of the third OFDM symbol are the same as input information bits of the fourth OFDM symbol; and
sending the preamble;
wherein the generating the preamble comprises:
obtaining the first OFDM symbol by processing the input information bits of the first OFDM symbol by channel encoding, interleaving, and modulating in a first modulation mode;
obtaining the second OFDM symbol by processing the input information bits of the second OFDM symbol by channel encoding, without interleaving, and modulating in a second modulation mode;
obtaining the third OFDM symbol by processing the input information bits of the third OFDM symbol by channel encoding, interleaving, and modulating in a third modulation mode; and
obtaining the fourth OFDM symbol by processing the input information bits of the fourth OFDM symbol by channel encoding, without interleaving, and modulating in a fourth modulation mode.

2. The storage medium according to claim 1 , wherein the third modulation mode is a binary phase-shift keying (BPSK) modulation.

3. The storage medium according to claim 1 , wherein the preamble is for an outdoor scenario of the wireless local area network, wherein an auto-detection is associated with the first OFDM symbol and the second OFDM symbol including same input information bits.

4. The storage medium according to claim 1 , wherein the first modulation mode is a binary phase-shift keying (BPSK) modulation, and wherein the second modulation mode is a quaternary binary phase shift keying (QBPSK) modulation.

5. A non-transitory computer-readable storage medium storing a computer program for execution by a processor, the computer program including instructions for:
receiving, in a wireless local area network, a preamble comprising a high efficiency signal (HE-SIG) field, wherein the HE-SIG field comprises at least two symbols comprising a first orthogonal frequency division multiplexing (OFDM) symbol, and a second OFDM symbol, wherein the HE-SIG field further comprises a third OFDM symbol and a fourth OFDM symbol;
obtaining information bits of the first OFDM symbol by parsing the first OFDM symbol by de-modulating in a first de-modulation mode, de-interleaving, and channel decoding;
obtaining information bits of the second OFDM symbol by parsing the second OFDM symbol by de-modulating in a second de-modulation mode, without de-interleaving, and channel decoding;
determining whether the obtained information bits of the first OFDM symbol and the obtained information bits of the second OFDM symbol are same by comparing the obtained information bits of the first OFDM symbol and the obtained information bits of the second OFDM symbol with each other;
obtaining information bits of the third OFDM symbol by parsing the third OFDM symbol by de-modulating in a third de-modulation mode, de-interleaving, and channel decoding; and
obtaining information bits of the fourth OFDM symbol by parsing the fourth OFDM symbol by de-modulating in a second de-modulation mode, without de-interleaving, and channel decoding.

6. The storage medium according to claim 5 , wherein the third de-modulation mode is a binary phase-shift keying (BPSK) de-modulation.

7. The storage medium according to claim 5 , the preamble is for an outdoor scenario of the wireless local area network, wherein an auto-detection is associated with determining that the first OFDM symbol and the second OFDM symbol includes same information bits.

8. The storage medium according to claim 5 , wherein the first de-modulation mode is a binary phase-shift keying (BPSK) de-modulation, and wherein the second de-modulation mode is a quaternary binary phase shift keying (QBPSK) de-modulation.

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Jiayin
• Zhu Jun
• Liu Yalin
• Lin Yingpei

Classifications

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04L27/2602 Primary

  Signal structure · CPC title

• H04L5/0053

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

• H04L9/40

  Network security protocols · CPC title

• H04L27/2603

  Signal structure ensuring backward compatibility with legacy system · CPC title