Wednesday, April 7, 2010

still has defects

The personal data communication is more and more tend to wireless. Multimedia services such as video and audio extend to the wireless mobile communication and have gradually been the main trends of the future development of wireless communication systems. How to provide multimedia services to ensure quality of service becomes the research hotspot. Improve the chi hair straightener performance of MAC protocol is an effective approach to provide chi flat iron quality of service guarantees of multimedia services.IEEE 802.11 is the main standard in wireless local area networks. 802.11e is proposed to support QoS of multimedia services. With the trendency of increasing polo shirts applications and growing network Lacoste Polo scale, it is critical to improve the performance of 802.11e for women's nike shoes providing QoS guarantee. This thesis studies the QoS guarantees and admission control chi hair straighteners mechanism in 802.11e based wireless networks.CFB Mechanism can increase the ralph lauren polo shirts network utilization and throughput, reduce latency and packet loss rate, but CFB Mechanism still has defects: CFB can’t provide QoS guarantees based on traffic flow to the flow of different datarate which belongs to different priority, and CFB can’t meet the fairness.Because the essential cause of the CFB Mechanism is the fixed TXOPLimit value.http://www.ecowaspeaceexchange.org
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