6. Measured Data

1、Pull distance test

At a straight-line distance of 3.7KM from the test site, the signal strength is - 94, the signal to noise ratio is - 6.0. The data packets of the built-in and external antennas are normal.

2、In building penetration test

 The gateway is installed in the surface well on the 15th floor of Building 4 in a community.

In the data in the above table, the signal strength is above -100 dbm (much greater than the receiving sensitivity limit of the module -139 dbm), and the signal-to-noise ratio is above -10, which can achieve bidirectional reliable communication. Therefore, placing the gateway on the 15th floor can achieve signal coverage for the entire 32 story building.

3、Data upload success rate test

Test conditions: 120 meters, 1 gateway (8-channel half duplex)

From the above test data, it can be seen that 120 meters can upload data within 3 minutes, with an average success rate of over 99%.

4. Conclusion

(1) The use of built-in antennas in the city can ensure normal communication within 2-3km. The use of external directional antenna can achieve a longer distance.

(2) The signal can penetrate a height of 10-15 floors.

(3) Using an 8-channel half duplex gateway can ensure reliable data transmission for 120 meters within 3 minutes. If a 16 channel half duplex gateway is used, reliable data transmission of over 200 meters can be achieved.

7. Application Case

This case is a large industrial park in Turkmenistan. The collection includes a series of infrastructure such as office buildings,residential buildings,sports venues, shops, etc. It is about 2.3 kilometers wide and 4.3 kilometers long.

This is a large park, which uses the following Internet of Things devices:

 The above data shows that the park not only uses a variety of IoT devices, but also a large number. And using LoRaWan technology, the frequency band is customized for it at 864-865MHz. By using 55 intelligent gateways G200 (indoor) and 55 intelligent gateways G500 (outdoor), all devices can be connected to the network. Simultaneously using one network server can receive data transmitted by all devices and perform efficient processing.

The overall system architecture used in the case is shown in the following figure:

All the equipment and services in this case are deployed locally in the customer's campus in an integrated manner, which can ensure the security and privacy of data transmitted by all equipment.

If customers need, they can also deploy the network server, access platform or application platform in the cloud. Or directly use the existing application platform to obtain and process data through docking with the access platform.

The application platform can provide various services required by customers for different devices according to the data collected by different devices: