Quality of Service (QoS) in Wireless Network, VOIP Simulation Environment

A Quality of Service (QoS) is determines if a wireless technology can successfully deliver high value services such as voice and video. The PHY and MAC layers of 802.16 are described in detail with regarding their QoS. The relations and interactions of these QoS mechanisms are described to give an understanding them. The UGS service flow can handles the traffic generated by VOIP calls in the most optimum way. Wireless networking has the potential for use in broadband Internet services, video and audio streaming, and as an alternative to the PSTN for voice service. The 802.16 has to handle the Requirements of very-high-data-rate applications, such as voice over IP (VoIP) and video or audio streaming, as well as lowdata-rate applications, such as web surfing, and handle extremely bursty traffic over the Internet. Voice IP (VoIP) over wireless local area network (WLAN), what are the performance of limitations in establishing VoIP calls over WLAN networks we performed some simulations. Simulation is a powerful tool for analysis and improvement of networking technologies, and many simulation packages are available. KeywordsQoS, VOIP, IEEE 802.16 Standards.