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| Fuzzy Flow Awareness Based Dynamical Priority Fair Scheduling Algorithm |
| Qiu Gon-gan①; Zhang Shun-yi①; Hu Jun② |
①Institute of Information Networks Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
②School of Electronics and Information, Nantong University, Nantong 226019, China;③Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract Flow-awareness based priority fairness scheduling scheme will perform distinct forwarding policy dynamically for different traffic flows to adapt the network change and enhance the fairness of scheduling. The fuzzy flow-awareness with the load state information can identify different services congruously in path. And the dynamic priority fairness scheduling algorithm based on fuzzy flow-awareness will adjust the priority of forwarding dynamically between streaming flows and elastic flows by changing the threshold of priority queue. The algorithm emphasizes the fairness of scheduling under the light load and the priority of real-time applications under the heavy load for their delay requirements. The analysis of fairness and the results of simulation show that proposed algorithm could enhance the admission probability of elastic flows largely by increasing the priority queue length reasonably. At the same time, simulation shows that the algorithm has high the average throughput of link and the utility of resources.
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Received: 07 June 2007
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2009, Vol. 31 
