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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
What Are the Differences Between HT20 and HT40, How Is the 11n 40 MHz Channel Is Partitioned, and What Are the Meanings of Plus and Minus?

What Are the Differences Between HT20 and HT40, How Is the 11n 40 MHz Channel Is Partitioned, and What Are the Meanings of Plus and Minus?

The channel bandwidth in HT20 mode is 20 MHz, and the channel bandwidth in HT40 mode is 40 MHz. Two neighboring 20 MHz channels are bundled to form a 40 MHz channel. One channel functions as the main channel, and the other as the auxiliary channel. The main channel sends Beacon packets and data packets, and the auxiliary channel sends other packets. When the HT40 mode is used in the 2.4 GHz frequency band, there is only one non-overlapping channel. Therefore, you are not advised to use the HT40 mode in the 2.4 GHz frequency band.

Two neighboring 20 MHz channels can be bundled into a 40 MHz channel. If the center frequency of the main 20 MHz channel is higher than that of the auxiliary channel, 40MHz-minus is displayed; otherwise, 40MHz-plus is displayed. For example, if the center frequency 149 and the center frequency 153 reside on two 20 MHz channels, 149+ indicates that the two 20 MHz channels are bundled to form a 40 MHz channel.

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Updated: 2019-05-10

Document ID: EDOC1000079719

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