Be careful even with a home wireless router How to prevent "Wireless LAN QoS control" from failing: Mechanism of wireless LAN "QoS control" [Part 2]

"Quality of Service" (QoS), which controls the bandwidth of wireless LAN, is required to have high reliability depending on the application used. For example, when using a voice call system for medical institutions. These cases require specialized skills in QoS control, as they will not function properly without careful bandwidth design.

If QoS control works as intended, high-priority applications preferentially allocate bandwidth. This prevents problems with the behavior of critical applications.

Getting QoS control to work as intended is not easy. Attempting to achieve only the purpose of QoS control can lead to other problems that are difficult to troubleshoot. The mechanism of QoS control is not universal. It is also necessary to consider the wireless LAN mechanism other than QoS control.

In order to effectively utilize the effect of QoS control, it is necessary to consider not only how to set the bandwidth but also how to design the entire LAN. Basically, the appropriate QoS control method differs between wireless LAN and wired LAN. In a multi-vendor environment that uses products from different vendors, it is even more difficult to achieve proper QoS control for the entire LAN.

QoS control is possible even with a general household wireless LAN router. In the case of home wireless LAN routers, QoS control functions that prioritize games and videos tend to be implemented.

It should be noted that the effect of prioritizing the bandwidth utilization of a specific application is limited to the target LAN, and the utility is unlikely to extend to the outside. QoS control is applied between network devices and client devices in the LAN, but basically it is not applied to traffic going out to the Internet. When traffic goes out to the Internet, it's all grouped into best-effort network traffic.

If you want to reduce application latency as much as possible, one option is to use a wired LAN with high connection stability instead of a wireless LAN, which tends to be congested.

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