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A channel width selection method and device

A technology of channel width and transmission success rate, which is applied in the field of communication, can solve the problems of transmission failure, VHTBSS data flow cannot be successfully received, etc., and achieve the effect of maximizing transmission performance

Active Publication Date: 2017-11-10
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When a Very High Throughput (VHT) Basic Server (BSS) and a High Throughput (HT) BSS coexist, the primary channel of the HT BSS may overlap with the secondary channel of the VHT BSS, where the HT BSS can be regarded as a hidden node, so that the VHT The transmission of BSS data traffic will be interfered by the transmission of HT BSS data traffic, resulting in the failure of VHT BSS data traffic to receive successfully, which is equivalent to the failure of sending

Method used

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  • A channel width selection method and device
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  • A channel width selection method and device

Examples

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Embodiment 1

[0035] In this embodiment, an example is how to select a channel width to send the data frame when the WLAN device as the sending end sends the data frame.

[0036] The WLAN device as the sending end may be an AP or an STA. When the WLAN device as the sender is an AP, the peer device, that is, the receiver device can be an AP or a STA; when the WLAN device as a sender is a STA, the peer device can be an AP or a STA.

[0037] see figure 1 , figure 1 It is a schematic flowchart of the channel width selection method in Embodiment 1 of the present invention. The specific steps are:

[0038] Step 101 , when the WLAN device needs to send a data frame, it obtains an idle channel width according to the physical detection results of the primary channel and its secondary channel of each channel width.

[0039] A channel width may correspond to a master channel and multiple slave channels, and physical detection is performed on the master channel and its slave channels of each channe...

Embodiment 2

[0067] In this embodiment, the process of channel width selection is described by taking the receiving end selecting the channel width for the sending end as an example.

[0068] In this embodiment, the WLAN device serving as the receiving end may be an AP or an STA. When the receiving end WLAN device is an AP, the peer device, that is, the sending end device can be an AP or an STA; when the receiving end WLAN device is a STA, the opposite end device can be an AP or an STA.

[0069] see figure 2 , figure 2 It is a schematic flowchart of the channel width selection method in Embodiment 2 of the present invention. The specific steps are:

[0070] Step 201, when the WLAN device receives a Request to Send (RTS) frame sent by other devices, and the channel width of the RTS frame is set to dynamic, according to the physical detection results of the main channel and its secondary channel of each channel width Get the free channel width.

[0071] Physical detection is performed...

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Abstract

The invention discloses a channel width selection method. The channel width selection method comprises the steps of obtaining clear channel width according to physical detection results of a master channel and all slave channels when equipment needs to transmit data frames; calculating the value of the transmitting performance of each clear channel width; selecting the channel width with the greatest value of the transmitting performance for transmitting the data frames. Based on the same concept, the invention additionally discloses a device which can enable the transmitting performance to be maximized and facilitate the use of clear channels.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a channel width selection method and device. Background technique [0002] In a wireless local area network (Wireless Local Area Network, WLAN), with the release of the 802.11ac standard, a wireless terminal (STA) can send layer protocol data units (Presentation Protocol Data Unit, PPDU), the entire channel width can be 20MHz, 40Mhz, 80MHz, or even 160Mhz. The 802.11ac standard also defines a dynamic bandwidth mechanism to determine the channel width to be used to transmit PPDUs during a transmit opportunity (TXOP) based on the receiver's channel conditions in the previous time slot. [0003] The improvement of these capabilities shows that while increasing the channel width to increase the data transmission rate, the channel width can also be changed dynamically. [0004] In the existing implementation, the channel width is only determined according to the detection resu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W84/12H04W24/08
Inventor 徐国祥张海涛
Owner NEW H3C TECH CO LTD