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One of the most popular applications of IEEE 802.16 network is to serve as a backhaul service for IEEE 802.11 networks. However, the traffic of an IEEE 802.16 connection aggregated from IEEE 802.11 networks fluctuates. Thus, efficient bandwidth reservation at the subscriber station (SS) is an importance issue. This study proposes a simple and flexible bandwidth reservation scheme at the SS, called...
A new backoff algorithm based on logarithmic function is presented by introducing the parameter which can change with the network state, in allusion to the problems of Binary Exponential Backoff algorithm of IEEE 802.11 MAC. This algorithm dynamic changes the initial value of collision window and the increasing extent of backoff by using the logarithmic function which takes the numbers of network...
In the original study based on the EDCA, the paper puts forward a concept of priority threshold to control traffics in a node. It makes EDCA mechanisms not only have the characteristics of priority, but also have good fairness. Among the nodes, optimized EDCA mechanism uses slot utilization to reflect the current network status, and changes the maximum and minimum contention window in order to improve...
Although the existing QoS-supported MAC Protocols can provide QoS guarantee at some degree, most of them sacrifice the performance of best-effort traffic. An adaptive QoS-supported backoff mechanism for MAC Protocol is proposed, in which nodes can adjust their backoff algorithm according to the network load state they measured. So the proposed adaptive backoff algorithm can improve the link utility...
Research on selfish nodes in wireless ad hoc networks has received considerable attention recently. However, most work concentrates on throughput study of the effects of selfish nodes, but lacks an analytical study to accurately predict the delay. With the rising popularity of delay-sensitive real-time multimedia applications (video, voice and data) in wireless ad hoc networks, it is becoming important...
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