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Channel indication method and device for wireless local area network (WLAN)

A wireless local area network and channel indication technology, applied in the field of communication, can solve the problems of discontinuous channels in the frequency domain, and achieve the effect of increasing available channels and improving throughput

Active Publication Date: 2017-08-15
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method and device for channel indication in a wireless local area network, which are used to solve the problem of indication of discontinuous channels in the frequency domain

Method used

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  • Channel indication method and device for wireless local area network (WLAN)
  • Channel indication method and device for wireless local area network (WLAN)
  • Channel indication method and device for wireless local area network (WLAN)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1 of the present invention provides a channel indication method applied in WLAN, which can be applied to a station, for example: figure 2 The AP and STA1-STA3 in the station can support next-generation WLAN standards, such as 802.11ax. Figure 10 is an exemplary block diagram of the channel indication method, and the specific steps are as follows:

[0072] Step 101: Generate a physical layer protocol data unit PPDU, the PPDU includes a preamble field and a data field, the high-efficiency signaling field HE-SIG-A of the preamble field includes a bandwidth identifier and a channel binding identifier, and the channel binding identifier It is used to indicate whether the channel for data transmission is continuous in the frequency domain.

[0073] Step 102: Send the PPDU.

[0074] Specifically, the channel bonding identifier (English: Channel Bonding, CB for short) includes at least 1 bit, and 1 bit is used as an example for description below. If the channel ...

Embodiment approach 1

[0077] Embodiment 1: If the channel binding identifier is the first value and the bandwidth identifier is the first value, the channel for data transmission includes the main 20MHz channel;

[0078] If the channel binding identifier is the first value, and the bandwidth identifier is the second value, then the channel for data transmission includes a master 20MHz channel and a slave 20MHz channel;

[0079] If the channel binding identifier is the first value and the bandwidth identifier is the third value, the channels for data transmission include the main 20MHz channel, the secondary 20MHz channel and the secondary 40MHz channel;

[0080] If the channel binding identifier is the first value and the bandwidth identifier is the fourth value, the data transmission channels include the main 20MHz channel, the secondary 20MHz channel, the secondary 40MHz channel and the secondary 80MHz channel.

[0081] If the channel binding identifier is the second value, and the bandwidth iden...

Embodiment approach 2

[0098] If the bandwidth identifier is the first value, the channel for data transmission includes the main 20MHz channel;

[0099] If the bandwidth identifier is the second value, then the channel for data transmission includes a master 20MHz channel and a slave 20MHz channel;

[0100] If the bandwidth identifier is the third value and the channel binding identifier is the first value, then the channels for data transmission include the main 20MHz channel, the secondary 20MHz channel and the secondary 40MHz channel;

[0101] If the bandwidth identifier is a third value, and the channel binding identifier is a second value, then the channel for data transmission includes a master 20MHz channel and a slave 40MHz channel;

[0102] If the bandwidth identifier is the fourth value, the channel binding identifier is the first value, and the channel range of data transmission is 160MHz or 80+80MHz, at this time, the channels of data transmission include the main 20MHz channel, the sla...

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PUM

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Abstract

The invention discloses a channel indication method and device for a wireless local area network (WLAN). The method comprises the following step that a transmission station generates and transmits a physical protocol data unit (PPDU), wherein the PPDU includes a preamble field and a data field, a high efficiency signal field A (HE-SIG-A) of the preamble field includes a bandwidth identifier and a channel bonding identifier, and the channel bonding identifier is used for indicating whether a data transmission channel is continuous or not on a frequency domain. In the way, indication of a discontinuous channel on the frequency domain in the WLAN is realized; a data transmission available channel is improved; and the system throughput is further increased.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for channel indication in a wireless local area network. Background technique [0002] With the evolution of the wireless local area network (English: Wireless Local Area Network, WLAN for short) standard, the WLAN system obtains a higher transmission rate by using a larger bandwidth. The standard usually takes 20MHz as the basic bandwidth unit, and 20MHz bandwidth is used in 802.11a, and the bandwidth increases to 40MHz in 802.11n, and has increased to 80MHz and 160MHz in 802.11ac. When the bandwidth is greater than 20MHz, one of the 20MHz channels is the main 20MHz channel, and the remaining 20MHz channels are slave channels. In the current standard, when the station accesses the channel, it must include the main 20MHz channel, that is, when the main 20MHz channel is occupied, even if other channels are idle, it cannot be used. The channel bandwidth d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W84/12
CPCH04L5/0094H04L27/2602H04L27/2603H04B7/0452H04L5/0037H04L5/0064H04W84/12H04W48/12H04L5/0053Y02D30/70H04L5/0044H04L5/0092H04L5/0048H04W24/02H04W72/0446
Inventor 李云波李彦淳刘乐张佳胤淦明
Owner HUAWEI TECH CO LTD