A SURVEY OF VOIP OVER WIRELESS LANS

Despite of the benefits of VoIP technology, designers still facing some troubles and challenges to provide the best VoIP quality of service (QoS). Wireless IP network evolution was mainly developed for data traffic exchange. Using this network for VoIP and Multimedia (Voice and Data) transmission raised new challenges to use a packetswitching network for VoIP technology. Sometimes a delay of data transmission, such as email and website surfing is acceptable for a delay time of ~ 1 sec. But such a delay on voice and multimedia transmission can cause an insufficient call session, and can fail the whole VoIP technology. In this paper we surveyed five scenarios where designers and engineers consolidate their effort to challenge the technology by providing scenarios that pave the way for best QoS that make VoIP technology more usable and widely commercially used.