What is the wireless AP belt capacity?

Some time ago, we released a number of cameras that a wireless bridge can carry. Many friends asked about the weak electric king. What is the capacity of a wireless ap? In order to understand his belt capacity, we have to understand the performance indicators of ap.

When doing wireless coverage projects, wireless AP selection should be done according to networking requirements and application scenarios. The wireless AP's capacity is an important reference factor. However, under normal circumstances, a single AP may not be able to achieve the amount of capacity claimed by the merchant, because there are many factors affecting the wireless AP with a large number of devices, the size of the broadband, the number of access devices, chips, memory, etc., will become an impact. The factor of the AP with the amount of power, all this must start from the working principle of the wireless AP.

First, what factors need to be considered before choosing an AP?

When selecting an AP for wireless coverage, consider the following:

Environmental characteristics: outdoor or indoor, terminal sparse distribution (such as warehouse) or high-density wireless access (such as conference rooms, multi-purpose halls, etc.).

Installation method: ceiling, panel or 86 box.

Power supply: Standard PoE (802.3af or 802.3at), Passive PoE or DC (DC power supply).

Coverage: single room, multiple rooms, area coverage, fixed point coverage, etc.

Frequency: 2.4g and 5.g, single frequency and dual frequency.

Band capacity: A single AP accesses 10, 20, 30 or 50 terminals.

The number of wireless APs on the market, different manufacturers claim different, 25, 50, 100, 200, really claimed to be so high?

In fact, there are no standard answers for how many end users a wireless AP can connect to, because the network applications of each usage scenario are ever-changing, and the terminal devices used are different. It is difficult to perform a standard test method. Therefore, many manufacturers use a typical application environment to estimate the amount of capacity.

Therefore, in order to ensure that the communication speed of the entire wireless network is not affected, a single AP needs to control the number of accesses of the wireless terminal, that is, what we often say to ensure that each terminal can obtain sufficient Internet bandwidth. .

As for the impact of the wireless AP's hardware configuration on its capacity, it mainly refers to the chip and memory size. The better the chip, the greater the throughput; the memory is also a factor that affects the amount of capacity.

Second, what are the factors related to wireless APs?

Here we use an example:

Take an example of an AP. We usually see that it has many parameters. Basically, each ap has these parameters. What do you mean?

Let's analyze the common parameters of ap:

1, dual frequency and single frequency:

Now the market is said to be a dual-band AP that supports 2.4G and 5G APs. In our general practical experience, the single-frequency ap belt is basically difficult to exceed 40. The dual-band capacity is much higher. The 5.8G dual-band AP may have twice the performance of the single-frequency. Therefore, if it is a high-density access site, it is strongly recommended to use a dual-band AP.

2. The difference between the frequency range of 2.4g and 5g (why use dual frequency):

2.4G frequency is the most widely used and is supported by almost all computers and smart devices. But because it is too common, even the microwave oven is also using the 2.4G band, so the interference is large, and serious interference will cause the data transmission rate to slow down.

And 5G Wi-Fi is born to avoid mutual interference problems, because this frequency is currently used less. Generally, a wireless AP supporting 5G based on 802.11ac technology can carry a higher transmission rate. 5G also has shortcomings. The biggest problem is that the ability to penetrate the wall is poor. The signal attenuation of the 5G signal after a load-bearing wall is very obvious.

and so:

The lower the frequency, the better the wall penetration. The higher the frequency, the faster the speed. At present, there are more people using 2.4G, plus the WIFI signal of CMCC, the interference is more serious! 5G is currently not used much, basically no interference, so dual-band AP can be applied at both frequencies.

3. What is 802.11 a/b/g/n/ac?

First, 802.11 is a wireless LAN standard. 802.11 a/b/g/n/ac is derived from 802.11. Different suffixes represent different physical layer standard operating bands and different transmission rates, that is, their physical layers and transmission speeds are different.

802.11b and 802.11g work in the same frequency band, g can be compatible with b, which means that the network card supporting g can support b.

The 802.11n protocol is a dual-band mode of operation (including two operating bands of 2.4 GHz and 5 GHz). This 11n guarantees compatibility with the previous 802.11ab, g standard, that is, we must see if there is an 802.11n parameter when we select AP.

The new generation of wifi standard 802.11 ac is developed from 802.11 n and has a higher speed than 802.11 n. Now the market says that dual-band APs and routers support both 2.4G and 5G frequencies.

4. Wireless rate?

Although many APs have wireless speeds of 450 Mbps, 600 Mbps, 750 Mbps, and 1167 Mbps, they are actually not available. For details, see the following list.

The actual rate is about half of the theoretical rate. We can use this table to calculate the largest amount of capacity. The main 802.11n standard AP is now used. The actual rate is 80Mbps-360Mbps, which can be estimated based on the bandwidth. His belt capacity, the basic upper limit is also around 100, and the new generation wifi standard 802.11 ac rate is higher, the belt capacity will be higher. Of course, the specifics need to be based on factors such as the chip, memory, and environment of the AP.

Finally, the wireless router and wireless AP with the capacity, the home wireless router with 8 to 15 terminals is the limit, the general wireless AP can bring 20-60 or so terminals. Remind friends, don't use home routers to do wifi project coverage in order to save money.