Quality of Service in wireless networks

The following article is about the network quality of service issues, which is a set of technologies that enable to users obtain from the network predicted level of services basing on particular rules e.g. throughput, delay and jitter. An investigation and comparison of QoS mechanisms, focusing on the Internet protocols has been done here, to analyze and compare existing solutions. Beginning from wired environment, where there are already well-known and well-designed QoS solutions like IntServ and DiffServ, we focus on the wireless communications which demands additional sometimes sophisticated protocols to be able to effectively handle mobility in communications.