Underground wireless communication method and system

Abstract

The invention discloses an underground wireless communication method and a system. The invention takes a lean AP mode as the network form of a wireless network, a wireless controller (AC) manages the lean AP intensively, the lean AP automatically converts into a fat AP when a problem occurs in the wireless network or the wireless controller (AC) is out of touch, and the normal operation of the network is ensured; when the connection of the wireless network is recovered, the fat AP is converted into the lean AP again so as to enhance the service quality of the system; and the wireless controller (AC) can transmit a special instruction to the fat AP, the fat AP receives the instruction, a corresponding motion is executed, and the functions of switching the fat / lean mode of the AP and setting the frequency band and the channel of the fat AP are realized by the wireless controller (AC). The system is a wireless voice communication technology with easy management and higher voice quality. The method can effectively improve the underground wireless transmission quality, enhance the success rate of roam switching and reduce the switching time.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a communication method and device, in particular to an underground wireless communication method and a system for realizing the method. Background technique [0002] Wi-Fi (Wireless Fidelity) wireless fidelity technology, which uses the 2.4GHz frequency band, provides a maximum bandwidth of 54M, and a transmission distance of more than 100 meters. It is a short-distance wireless technology used in offices and homes. [0003] WLAN (Wireless Local Area Network) is a wireless local area network, an unlimited network formed using Wi-Fi technology. [0004] SIP (Session Initiation Protocol) is the initial session protocol. The SIP server is based on the SIP protocol. It is responsible for establishing all SIP telephone calls and multimedia communications in the network. It is the brain of the entire communication network. [0005] A Wi-Fi phone is a phone that establishes a WLAN b...

AI Technical Summary

Problems solved by technology

The authentication of the Wi-Fi phone is on the AP, resulting in multiple authentications when the Wi-Fi phone is moving.

It is easy to cause call drop and cause system instability

In addition, the wireless data transmission between APs uses the 5.8G frequency band, and the higher the frequency of the downhole signal, the easier it is to generate signal multipath interference

Seriously affect the quality of data transmission

In addition, it is not easy to lay fiber optic networks in many places underground, and the Ethernet cable has a distance limit of up to 100 meters, resulting in difficult construction and cumbersome maintenance in the later stage.

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