Wi-Fi What is the best way to send radio waves to the second floor?

The longer the distance from the Wi-Fi router (base unit) to the child unit such as a personal computer or smartphone, the weaker the signal and the slower the communication speed. Also, if a Wi-Fi router is installed on the first floor, the radio waves will be even more difficult to reach on the second floor due to the distance and obstruction by the structure of the house such as the floorboards. If the radio wave condition from the Wi-Fi router is bad in a remote place such as the second floor, introduce a repeater or a "mesh network (details will be described later)" on the way, and the Wi-Fi radio wave will be far away. Just make sure it reaches you.

This time, we will explain the advantages and disadvantages of repeaters and mesh networks, and install a Wi-Fi router on the first floor of a detached house, introduce repeaters and mesh networks along the way, and use Wi-Fi radio waves. We investigated how the communication speed on the second floor changes when relaying.

If you put a Wi-Fi router (base unit) on the first floor, you may not get the speed you want on the second floor. Use a repeater or mesh network to relay Wi-Fi signals to the second floor

The range is about 20 meters, and repeaters are weak at half the speed

Wi-Fi signals are said to reach about 100 meters if there is good visibility. However, since it is obstructed by obstacles in the house and affected by the surrounding radio wave conditions, it actually reaches only about a 20 meter radius from the place where the Wi-Fi router is installed. If the room is located on the second or third floor of a detached house and is far from the Wi-Fi router, it is quite possible that the signal will be poor.

Wi-Fi radio waves reach only a radius of about 20 meters around the Wi-Fi router. This is because there are many things in the home that block radio waves. The image is a visualization of how far the radio waves reach in the test environment using the smartphone app "Wi-Fi Mireru" from I-O Data Equipment. A device that allows Wi-Fi radio waves to reach long distances by installing them in The price is reasonable at about 5000 yen, so it is easy to introduce. However, repeaters currently on the market cannot send and receive data in the same frequency band at the same time. So the speed is halved.

If the 11ac repeaters currently on the market relay the same frequency band, such as from the 5GHz band to the 5GHz band or from the 2.4GHz band to the 2.4GHz band, the speed will be halved because they cannot receive and transmit at the same time.

The contents of the repeater are actually almost the same as a Wi-Fi router. Most Wi-Fi routers on the market today have a repeater mode, which you can switch to and use as a repeater. You can switch the operation mode with the switch on the back or the setting screen. However, I would like to note that it will take some time to open the setting screen of the Wi-Fi router that operates in repeater mode. If you make an incorrect setting and the Wi-Fi router setting screen cannot be opened, you can return the Wi-Fi router's operation mode to "router" or initialize it using the reset button.

Most Wi-Fi routers have a repeater function. When using it as a repeater, switch the operation mode with the setting screen of the Wi-Fi router or the switch on the back. The name of the switch on the back varies depending on the manufacturer, such as "WB", "CNV", and "Repeater", so please read this carefully

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