ALL ABOUT WIRELESS CONNECTIVITY
Understanding Line of Sight in Wireless Networks
Find below the main differences between LoS, nLoS and NLoS.
Types of Wireless Internet Links
Using Repeaters – for long-range connectivity
Licensed vs. Unlicensed Products and Bands
Sub Technologies within the greater wireless market
There are two broad subsections within the greater wireless access technology family, simply unlicensed products and licensed products.
The biggest disadvantage of using unlicensed technologies is simply the risk of interference from other devices using the same unregulated piece of spectrum. The choice to use unlicensed spectrum is one the service providers need to make, in areas where the noise floor is low (number of other devices in the area using the same spectrum) this becomes a good option. In areas where the noise floor is currently high or is likely to become high soon, this becomes a poor option.
The biggest advantage of using unlicensed technology is the relatively low cost. The attractiveness of the low cost makes sense in the correct area but the short term benefits of low cost are not worth the risk in areas with a high noise floor. Anywhere in Gauteng, an unlicensed link may be a perfect option for a very small business using data services only but certainly not for anything bigger than a very small business. In the middle of Burgersfort, it may make sense for a big company to make use of unlicensed technology.
Advantages and Disadvantages
Microwave (2 to 38 GHz)
millimetre-wave (71 to 86 GHz band)
Cables should be installed in:
Bosal or PVC piping
Not glued to walls or poles
On wire mesh grids supported by concrete/brick supports for horizontal runs
Cables should be cable tied at least every 50cm to secure them
At no point must water be able to run down the cables entering either :
The cable is not allowed to hang horizontally unsupported
Cables are not allowed to lie directly on a roof or other flat structures that may allow prolonged water buildup around them.
Cables entry points should be weatherproofed with butyl based sealants
All equipment including cables must be labelled
Types of Antennas
1/4 wavelength ground plane
Sector or Sectorial antennas
Questions to ask when evaluating a Wireless provider
Is the product standards-based or proprietary?
Is the product’s mechanics in order?
Is the product spectrally efficient?
Service Level Agreement
– Thanks to Comsol Wireless Solutions for this contribution.