WLAN network can operate in two frequency ranges – it can use the 2.4 GHz and 5 GHz bands. 2.4 GHz band is more popular. First of all, it is compatible with most devices – even those cheaper, less advanced or older. In addition, this frequency band effectively reaches many rooms, because it easily overcomes physical obstacles such as walls, doors or furniture. Unfortunately, it is worth taking into account that the popularity of this solution is also its … disadvantage. This can be the reason for overlapping channels and an inconvenient drop in upload and download speeds.
On the other hand, waves with a frequency of 5 GHz, despite the fact that they overcome physical obstacles worse,allow the use of more channels (instead of 13, as is the case in the 2.4 GHz band, there are as many as 19 in Poland). And although not all of them can be used, they still experience lower occupancy than the aforementioned 2.4 GHz band. Thus, the overlapping of signals occurs on a much smaller scale. Additionally, users can enjoy faster Internet speeds in this case. Unfortunately, in rooms that are further away from the router, the signal may be weaker.
Therefore, although the WLAN network can be built very quickly, it is worth noting to do it effectively – so as to minimize the risk of possible disruptions right from the start.
Therefore, the construction of a WLAN network should begin with its design. During the design stage, we may come across a number of technical inconveniences: the thickness of the ceilings, the material of the partition walls (steel, glass), energy devices, microwave ovens, etc. These are just some of the potential sources of problems with signal coverage or transmission power and interference in network operation.
If we are interested in a WLAN network for an office building with several or several floors and many walls, it should be expected above all that the attenuation of the walls and ceilings can significantly affect the level of the radio signal. In this case, you should choose a few, a dozen, or maybe several dozen access points and place them throughout the building – so as to cover it with wireless network coverage in accordance with the investor’s requirements. Practice shows that such access points should be on every second floor in every fifth office. However, this is only a theory and you should be flexible in this case – so that the WLAN is tailored to the needs of a specific audience and made in accordance with the design.
Already at the stage of building a WLAN network, it is also worth considering the issue of its security. In this case, it will depend on what and for whom this network is to be used. It will be different when the network is used by specific employees, and access to it will be even divided into their individual groups. Still other security considerations will apply in conference rooms, where the Internet will be made available to guests staying there. And still other rules will apply to the home and its immediate surroundings.
Logistics prevails in Production and Transport, here the wireless network is a key element in IT and Business. WLAN here ensures smooth and fast operation of the warehouse, WMS systems and administration.
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