| Abstract [eng] |
This work is an analysis of wireless computer networks Wi-Fi and their problems. Few main wireless networks problems established. Radio module working mode is halfduplex, insufficient transfers of useful data stream, absence of stream classification and prioritisation in my opinion is a main problems of wireless devices. Attempt to search solution of the problems. One of the possible solutions is making an own wireless device witch will have realisation of this problems. Searching for necessary parts to make a device, such as platform, radio module, antenna ant other necessary parts. First of all I have chosen PC-based platform because it has a good productivity ant is more universal. Unambiguous choice was 5 GHz radio frequency, because device will be tested and used in real network infrastructure of Vilnius city. The use of 2,4 GHz radio frequency was rejected because of high radio pollution. It emerged that analysed problems are associated one with another and needs complex solution. Was found nature of this problems and its solutions: total bandwidth shaping, separation of different streams by purpose and their shaping. Searching for standard and nonstandard means to solve such problems, modifying, matching together and adjust to created system. Only in real network infrastructure with real user generated streams was able find and eliminate limitations. |
