Research On QoS Performance Of IEEE802.11e Networks

As wireless local area network with easy to use, simple and Networking Method, as well as high reliability, so in recent years, wireless local area network technology and applications has seen rapid development.Wireless LAN is seen as an extension of traditional wired networks, in some environments can also be an alternative to traditional wired networks, along with wireless LAN technology, breeding and health of the wireless LAN applications have also entered the people's daily lives and The rapidly growing popularity, however, due to the wireless LAN services, such as voice services, video services such as the explosive growth of wireless LAN performance, put forward higher requirements, therefore, how to improve the quality of service the wireless LAN has become a contemporary study of IEEE802.11 wireless LAN hot spots and difficult. For this reason, this more detailed analysis of the quality of service IEEE802.11e for network protocol performance and characteristics of competition through the use of dynamically adjusting the window size of the ways to improve business throughput and reduce transmission delay and improve the quality of service wireless LAN.This paper introduces the IEEE802.11 working principle of the mechanism, focusing on analysis of DCF and PCF channel access method for access to the above characteristics of the way that its presence in the network service quality guarantee on the shortcomings, and then the IEEE802.11 and able to to improve priority services for the channel access method IEEE802.11e Agreement contrast, described the agreement IEEE802.11e better meet the QoS needs of the business, but also lack of agreement on a description IEEE802.11e the final agreement for the lack of IEEE802.11e network load conditions is proposed based on dynamic adjustment of contention window size of the research program, in the NS simulation environment, add the IEEE802.11e agreement, the agreement is implemented in the NS process of doing the relevant instructions, and simulation results have been some programs were compared, by data analysis obtained the program in the multimedia aspects of the throughput and latency performance does improve, the program also received the expected results.