The reason is that the network traffic volume has exceeded the APs' capacities. In most
student dormitory buildings, each floor has three or four APs to avoid co-channel interference.
Each AP usually provides signal coverage for at least six dormitories. In peak hours, there
may be 20 to 30 students surfing on the Internet in an AP's coverage area. As a result, the
required bandwidth exceeds the APs' capacities. Therefore, more APs are recommended in
dormitory building with a high user density and high traffic volume. To avoid co-channel
interference, antennas can be installed in dormitories.
