So you have to talk about wireless AP channel settings. In order to prevent interference, wireless APs are generally marked with 1 to 13 channels to choose from. The problem is that the 13 channels are not independent of each other. Focus on wireless AP products and solutions for many years of rich Runda to make a brief introduction.
1. The channel can be compared to the RJ45 network cable. There is a signal overlap area between two adjacent wireless APs. To ensure that the signal channels used in this area cannot cover each other, wireless APs that cover each other must use different channels. Otherwise, wireless APs will be affected. The signals interfere with each other, causing the overall performance of the wireless network to degrade.
2. Each channel interferes with the channels on both sides of the channel, that is, the channel settings between two adjacent wireless APs are separated by more than three.
3, wireless network protocol IEEE802.11 has a/b/g three.
4. 802.11a operates in the relatively loose 5GHz band (relative to the crowded 2.4GHz), has 12 non-overlapping channels, and has an advantage over the channel, but the signal coverage is limited.
5. 802.11b/g is down-clocked to 2.4 GHz (specifically, 2.400 to 2.4835 GHz) and has only three independent channels, that is, only supports three non-overlapping transmission channel channels (channels 1, 6, and 11 respectively). 13 is non-conflicting, but Channel 3 will interfere with 1 and 6, and devices using Channel 9 will interfere with 6 and 13). The speed of b is much slower than g, and the transmission rate can be automatically reduced from 11 Mbps to 5.5 Mbps, or adjusted to 2 Mbps and 1 Mbps according to direct sequence spread spectrum technology to ensure the normal operation and stability of the equipment. 802.11g can be backward compatible with IEEE802.11b, and due to the use of the same modulation method as IEEE802.11a, the data transmission rate can reach 54Mbps.
6. The 2.4GHz radio frequency band used in the 802.11b/gWLAN standard is the most commonly used frequency band, such as Bluetooth, wireless mouse, mobile phones and even microwave ovens, so other wireless devices will also have an impact on the wireless network. For example, I use the wireless mouse and keyboard frequency between 2.420GHz-2.480GHz, although the manual says that there are 16 workgroup frequency, and can automatically frequency hopping, but when my wireless routing channel is set at 3-6 when the interference is very obvious It is often the case that the speed is very slow. When I set the channel to 11 or 13, this will not happen.
Therefore, the final summary of experience is: try to set the wireless AP channel to both ends (that is, 1 or 11, 13) to avoid interference from other wireless devices. The channel settings of two adjacent wireless APs must be separated by more than 3 channels to prevent interference.
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