WIA-PA based wireless gateway and communication method thereof

Abstract

The invention relates to a WIA-PA based wireless gateway which comprises a power supply module, a digital filter and a gateway core board, wherein the digital filter and the network core board are connected with the power supply module, and the digital filter which is connected with an antenna is connected with the gateway core board. A communication method of the WIA-PA based wireless gateway comprises the steps that when data is received, the network core board sends a command to the digital filter via a serial port, the digital filter configures a reception channel according to the command and receives an RF signal via the antenna, the RF signal is filtered and then stored in a FLASH via a modem and converted into data of TCP / IP protocols via a CPU, and the data is transmitted via a network port; and when data is sent, the network core board modulates a digital signal into the RF signal and transmits the RF signal to the digital filter, an emission link in a narrowband filtering and amplification unit is powered on via a trigger signal of the modem, and the data is sent via the antenna. According to the WIA-PA based wireless gateway and the communication method thereof, interference signals in the 2.4GHz free frequency range as WLAN can be effectively filtered, the data reception sensitivity is improved, and the transmission distance is increased.

Description

technical field [0001] The invention relates to a WIA-PA wireless gateway, specifically a wireless gateway used in the petroleum industry, based on the WIA-PA protocol, which communicates with the RTU and the instruments it manages in a wireless manner, and realizes network protocol conversion at the same time and its communication methods. Background technique [0002] In the oil and gas Internet of Things in the petroleum industry, most of them use zigbee technology. Generally, zigbee technology is used for transmission between RUT (oil pumping well controller) and wireless instruments. RTU demodulates the received data, and after demodulation The data is transmitted to the data transmission module through the RS-232 level according to the relevant protocol, and the data transmission module modulates the data for wireless transmission; [0003] At present, the oil and gas Internet of Things generally adopts the 2.4GHz free frequency band, which is a free free frequency ba...

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Problems solved by technology

[0003] At present, the oil and gas Internet of Things generally adopts the 2.4GHz free frequency band, which is a free free frequency band. All major operators have large-scale commercial WLAN coverage. In order to meet the high speed requirements, the outdoor WLAN signal transmission is generally 2W, and some oil fields use WLAN as Backbone network transmission requires that the spatial WLAN signal amplitude is generally greater than -65dBm. In addition, the wireless camera used in oil well monitoring is also a major interference that interferes with communication in the 2.4GHz frequency band, which inevitably leads to a decrease in the signal-to-noise ratio of zigbee and other systems. As a result, the transmission distance of wireless devices is reduced

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