With the rapid development of wireless mobile communications, wireless mobile networks and devices have become more and more popular, as they can facilitate information access and communication at any time and any place. Wireless local area networks use lace wedding dresses wireless transmission mediums to form local area networks. For areas where wiring is difficult, they can provide communication capacities and facilitate installation, use and management.The IEEE 802.11 protocol is the standard protocol for wireless LAN MAC layers and physical layers. In the past, custom made prom dresses only provided a transmission rate. In recent years, through the use of different modulation and coding methods, IEEE 802.11 has begun to provide a variety of transmission rates in physical layers. Considering that multi-rates help to improve network throughput and improve savings in 12hot cheap prom dresses energy consumption, researching multi-rate problems is of great importance. For plus size wedding dresses instance, a major direction of research in multi-rate problems is how one can choose an appropriate rate adjustment algorithm in accordance to channel status. This paper new wedding dresses combines thinking on network protocol stack cross-layer design—so-called cross layer design refers to breaking inherent independence in levels in network protocol hierarchical designs, strengthening wedding dresses 2010 inter-layer interaction and data collaboration, and optimizing the overall network design method. Through information exchange between the application layer and the MAC layer, a kind of best clothes blog cross-layer adaptive rate adjustment algorithm is designed, and overall network performance is enhanced through simulation verification.At the same time, this paper analyzes the original IEEE under multi-rate environment.In the 802.11DCF exponential backoff mechanism fairness issues such as low utilization rates in networks and throughput anomalies exist.
flyingbird
nike
software life
sports
sky
