Here's how to deal with Amazon products such as Amazon Echo, Fire HD tablet, Fire TV Stick, and other Wi-Fi access points in the 5GHz band.
Specifically, this is a method of dealing with symptoms that do not display only 5GHz band SSIDs on the list screen of the Wi-Fi access point, or only some SSIDs are displayed.
5GHz band 2.It is not crowded than the 4GHz band, and it is a frequency band that is difficult to affect the microwave, so I want to use it if it can be used.
This site is Amazon.Child.When I checked with the JP, I got an answer that all Amazon products for Amazon compatible with 5GHz band Wi-Fi are only supported to the "W52" standard.
"W52" is the standard name of the 5GHz band Wi-Fi and can only use the frequency band of 36, 40, 44, and 48ch.
The Wi-Fi standard in the 5GHz band defines "W53" and "W56" in addition to "W52", but as described below "W52", use a frequency band that interferes with the Japanese weather radar except for "W52".Due to the fact, domestic law requires complicated control.
Amazon hates its complex specifications, and it seems that at least a policy that only supports the "W52" standard for products for Japan.
This policy is consistent regardless of model, such as Fire HD tablet, Fire TV, Fire TV Stick, Amazon Echo, Amazon Echo Spot, and if it is a regular Amazon product for Japan, only "W52" is supported only.It is.
So, the only way to connect Amazon products to 5GHz band Wi-Fi is to change the settings on the wireless LAN router side.
Specifically, on the wireless LAN router side, one of the following settings is required.
When I checked it in the environment at hand, the NEC Wi-Fi router had an item that could set the "search target bandwidth" together.
When this setting was set to "W52" only, it was confirmed that even Amazon products could be connected stably to the 5GHz band Wi-Fi.
Also, with the Buffalo router at hand, the 5GHz band "wireless channel" was set stably by setting one of 36,40,44,48.
For reference, this is a screenshot when connected to the 5GHz band with Fire HD 8.
Generally, the 5GHz band is 2.Although it is more vacant than the 4GHz band, the 5GHz band Wi-Fi of the router that squeezes the channel used in this method is more crowded, so the communication speed of other devices connected to the 5GHz band of the same router is reduced.It may be affected.
In my home, two wireless LAN routers are prepared, one is set for 5GHz bands exclusively for Amazon equipment, and the other can be used to use a wide range of 5GHz bands for PC/smartphone.It is well operated by the configuration, but if you operate a wireless LAN device with one unit, you should pay attention to this area.
Depending on the environment, it is divided by Amazon equipment 2.I think that using the 4GHz band is one option.
If you write just in case, it does not mean that the Amazon product will not be able to connect to Wi-Fi in the 5GHz band without making these settings on the router side.
However, since the wireless LAN connection channel changes at any time depending on the surrounding radio wave usage, the connection may be cut off, and it may not be possible to reconnect, and there are many cases where it is not stable.
In that sense, even if the Wi-Fi connection is unstable, it is a good idea to check if it is not connected to the 5GHz band Wi-Fi or the router side is "W52".
Let's go a little further and summarize the detailed information about interference between wireless LAN and weather radar.
As mentioned above, out of the 5GHz band Wi-Fi standard "W52", "W53", and "W56", "W53" and "W56" are "DFS (DYNAMIC FREQUENCY SELECTION), which interferes with Japanese weather radar, etc.) The channel is used, and the implementation of interference prevention specifications is legally enforced.
Specifically, it is obliged to have detailed control, such as not blowing radio waves for one minute after startup or not using the channel for 30 minutes if the weather radar is detected.
In devices such as PCs and smartphones where people always look at the screen, DFS control is rarely a problem, but devices such as smart speakers without screen seem to be easy to reduce usage.。
At the moment, it seems that such problems will not be a lot of close -ups, but in the future, if the reconnection processing is fevip with a smart speaker other than Amazon compatible with the 5GHz band, we will hear such a story.You may have the opportunity.
DFS authentication is carried out not only in Japan but also overseas, and problems similar to Europe may be revealed.
As a guess, maybe Amazon is only compatible with "W52" on Japan's devices for the purpose of avoiding DFS authentication in Japan from a comprehensive perspective of usage and cost.
The 5GHz band Wi-Fi specifically, 802.It is standardized with names such as 11 AC / N / A, and often has names such as "~a" at the end of the access point name.