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Wireless local area network information transmission method and device

一种无线局域网、信息传输的技术，应用在无线局域网信息传输方法和装置领域，能够解决传播路径复杂等问题

Active Publication Date: 2018-08-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the wireless communication system is greatly affected by the wireless channel, such as shadow fading and frequency selective fading, etc., making the propagation path between the transmitter and receiver very complicated

Method used

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  • Wireless local area network information transmission method and device
  • Wireless local area network information transmission method and device
  • Wireless local area network information transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Since the RL-SIG and the L-SIG in 802.11ax are exactly the same, the following descriptions will be made with the L-SIG as the object, and the same processing will be performed for the RL-SIG.

[0039] In a preferred embodiment, the L-SIG / RL-SIG field is generated or processed, including, under the 20MHz bandwidth, substrings with sequence numbers -28, -27, 27, and 28 in the L-SIG / RL-SIG field The content carried on the carrier is sequentially -1, -1, -1, 1, which is recorded as C1. Then perform subsequent processing, for example, sending the generated or processed L-SIG / RL-SIG. Under this content, the maximum PAPR of L-SIG / RL-SIG after adding additional subcarriers under 2730 different values ​​can be very small.

[0040] Or, in another preferred implementation manner, generating or processing the L-SIG / RL-SIG field includes, the serial numbers in the L-SIG / RL-SIG field under 20MHz bandwidth are -28,-27,27,28 The content carried on the sub-carriers of is sequentially...

Embodiment 2

[0044] Embodiment 2 is different from Embodiment 1. When the transmission bandwidth is greater than 20 MHz, for L-SIG / RL-SIG, after each 20 MHz duplication and phase rotation, corresponding values ​​are inserted on corresponding subcarriers. In this implementation manner, at this time, the contents carried by the extra subcarriers on the L-SIG / RL-SIG field on different 20 MHz may be different. In this way, the maximum PAPR or average PAPR under 2730 different values ​​of L-SIG / RL-SIG can be further reduced.

[0045] Figure 10 It shows the transmission process of the L-SIG / RL-SIG when the transmission bandwidth is greater than 20 MHz in this embodiment.

[0046] exist Figure 10 In , the module "insert the corresponding value at the corresponding subcarrier position according to the transmission bandwidth" is specifically explained:

[0047] 1) When the transmission bandwidth is 40MHz, insert content 1, -1, -1, 1, -j in sequence on the subcarriers with serial numbers -60, -...

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Abstract

The invention discloses an information transmission method in a wireless local area network. The method comprises the steps of generating a legacy signal field and / or repeated legacy signal field (L-SIG / RL-SIG), wherein subcarriers of the L-SIG / RL-SIG with sequence numbers of -28, -27, 27 and 28 under a bandwidth of 20MHz carry -1, -1, -1 and 1 in sequence; and sending the generated L-SIG / RL-SIG.

Description

technical field [0001] The embodiments of the present invention relate to communication technologies, and in particular to a method and device for transmitting wireless local area network information. Background technique [0002] Wireless Local Area Networks (WLAN) is a data transmission system that uses radio frequency (Radio Frequency, RF) technology to replace the local area network formed by the old twisted-pair copper wires, so that the wireless local area network can use simple The access framework allows users to achieve the purpose of information transmission through it. The development and application of WLAN technology has profoundly changed the way people communicate and work, bringing unprecedented convenience to people. With the widespread application of smart terminals, people's demand for data network traffic is increasing. The development of WLAN is inseparable from the formulation, promotion and application of its standards. Among them, the IEEE802.11 ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/20H04W84/12H04W4/00
CPCH04W4/20H04W84/12H04L27/2628H04L25/0202H04L25/0224H04L27/2602H04L27/2621H04L5/0007H04L5/0048H04W28/06H04W72/12H04W88/08H04L27/2603H04W4/00
Inventor 向铮铮朱俊张佳胤庞继勇
Owner HUAWEI TECH CO LTD
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