To optimize and increase the bandwidth of 802.11n/ac dual-band routers, either:

There are several reasons for using a split-the-traffic approach:

By default, dual-band routers use the same network name on both the 2.4 GHz band and the 5 GHz band. The simplest way to segment traffic is to rename one of the wireless networks, as shown in Figure 2. With a separate, descriptive name, it is easier to connect to the right network.

To improve the range of a wireless network, ensure the physical wireless router location is free of obstructions, such as furniture, fixtures, and tall appliances. These block the signal, which shortens the range of the WLAN. If this still does not solve the problem, then a Wi-Fi Range Extender or deploying the Powerline wireless technology may be used.