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After investigating the environ¥★☆ment, how can we accuratel→₽Ωy, scientifically and qu↕"ickly predict the approximat•© e wireless AP demand?
According to this prφoblem, today we will understand $♥φthe factors affecting the numberα×± of wireless AP placement and t¥≤δhe method of calculating the numberλ$ of wireless AP bandwidt§β£∏h factors affecting the numbe£♠r of wireless AP placement:
1. Network bandwidth
Usually when discussing∞& the bandwidth of a link, it rπ≤↔efers to the number of bΩ©↓its that can be transmitte↓δ¥d per second on the link, emphasizing t♣ ∏he rate that can be achieved. Fo™∑r example, the bandwidth o♦™¥f 100 gigabit Ethernet is 100 MBPS, a γnd the bandwidth of Gigabit Ethernet is♦>γ 1000 MBPS.
2. Throughput
Throughput and bandwidth ≠φ↕are confusing terms. When discussing tα™he bandwidth of the comm€$₽♠unication link, it generally r↕•¶efers to the number of bit ₽®s that can be transmitted per seco £♣nd on the link, which depends on the €€'εlink clock rate and chann₽ ♦el coding in the comput☆✘$>er network, also kno¥∑wn as the line speed, which can be s☆< aid that the bandwidth of 10 ↓÷0 megabit Ethernet is 100 MBPS. The<₹ difference between bandwidth and throuΩγghput: Bandwidth emphasizesδ♣♥¥ the speed that can be ach≈ ieved, while throughput emp >←hasizes the actual speed. ↕₩Because the reality i✔ s affected by various inefficie ★☆∞ncy factors, it is usually more inclin•ed to use "throughput" to exσ✔↔press the performance of the ne♥☆£σtwork.
3. Coverage
In a non-high-density scenario, yoβu can determine the number of wir ≤≤≥eless aps based on the actua™×l scenario area and recomme$¶₽♥nded coverage range. I≠ n some cases, the co£∞♠♠verage distance can also be∏≈ calculated, and the co←≤verage range can be adjuste₩<d appropriately according≤× to the power.
4. Access number
In a high-density ar→←ea, you must also consider the <number of wireless aps to be accessed↔∑∑. The recommended numb∑↑ ¶er of wireless aps varies accordi↑>☆βng to the number of ε≠concurrent access users (no☆♥tebook and mobile phones are differen✘€★↔t).
Bandwidth Indicates the n↓☆umber of wireless aps
Many users have such a question: thi§∑♣s scenario this solution deploys so ÷many aps, the bandwidth su∏¥pport is not supported? If it is not > πsupported, then the user's Intγ∏ernet speed has become turtle spe& γed? Or how much egress bandwid₩₽th does the deployed AP need?
① The egress bandwidth✘←" can be obtained based o∑"÷n the number of aps, the number oβ$♦f concurrent users, ☆<and the bandwidth allocated b←↓y each user. WLAN capaciγ∑β'ty bandwidth = Number of concu✘☆rrent users x bandwiπ♦♠dth per user.
(2) The number of co♠ncurrent users can be est®↔↕imated by 50% to 70% based on the ₹☆number of users in the coverage scena✔↓σrio.
In order to make each wireless t≠≤ πerminal have enough bandwidth to Ω•> use, it is generally recommended that a €₩ wireless AP access 10 to '✔÷15 wireless.
④ Number of aps = concu≈&¶♠rrent users ÷15(the number of users ac®↓₩commodated by a single AP, thδ"©is value can also be adjustedφ'↓• according to the number oα↓ f users accommodated by AP).
The bandwidth allocated bεy each user can generally £ be set to an intermediate∞★ value for calculation estimation,∏ such as 100kbps. (Common unit con∑€ version: 1TB=1024GB, 1₹βG=1024MB, 1MB=1024KB, 1KB=1024B, 1 byte®≤ =8 bits.)
Here's an example:
A university has 30,₩↑™€000 campus users and 15,000ππ₩☆ mobile terminal users. The concurre'<σ♣ncy ratio is 50% to 70%. The bandwidt¶"♣h of each user is 512K♣₩₹∑bps.
Answer:
1, concurrent accessπ↔ =15000x(50%~70%)=7500~♣→±•10500 people;
2. Number of aps = Number ofα©∞ concurrent users ÷15=(7500~10500)÷↑¥↑15=500~700;
3. WLAN capacity requirem♦ ✔¶ent =(7500~10500) x 0.512=(3840~5376)M→.
And finally:
AP demand will change according to ☆the application enviro€×±↓nment, AP performance, bandwidth×↓₽ and other changes, so master th☆✘&e calculation formula, in th≤↕e actual application sh'÷≈ould also be flexible aσ♥ccording to the actual sit≈≈uation.
