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Mobile Multimedia Communication Scheduling Algorithm
Author: ZhouDaoBing
Tutor: XiaoGuoQiang
School: Southwestern University
Course: Applied Computer Technology
Keywords: Queue scheduling Rate Control Quality of service
CLC: TN919.8
Type: Master's thesis
Year: 2006
Downloads: 89
Quote: 1
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Abstract
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As wireless networks and multimedia communication technology, mobile multimedia services will be more widely used. In the mobile communication system, how to provide services according to the needs of users of mobile multimedia communication quality assurance process of development important challenges. Packet scheduling algorithm is realized in the core network quality of service mechanisms, is an important network resource management by controlling link bandwidth allocation, different traffic available to different services. Therefore, the study of mobile multimedia communication scheduling algorithm has a very important significance. In this paper, packet scheduling algorithms analyzed the current situation, focusing on the speed control algorithm based on research carried out in this study based on the DRS algorithm has been improved to give MDRS algorithm; proposed based speed control wireless scheduling algorithm WDRS (Wireless Dynamic Regulation and Scheduling); Simulation results show the superiority of these two algorithms. In MDRS algorithm, the traffic shaping control to enter the adjustment first, then into the scheduler (the scheduler uses the principle of first come first served) while adjusting the scheduler is further based on the state of the adjustment of the rate of flow is sent for service adjusted so that the output of the scheduler service data flow to meet user requirements. The algorithm improves the traditional algorithm feedback condition, making it a capable of continuous operation of the algorithm. Compared with traditional scheduling algorithms, this algorithm network utilization is high, and the packet transmission delay and delay jitter performance has significantly improved, while the algorithm also has good isolation capability and rate of flow control ability. WDRS adjuster by the queue scheduling algorithm, the token slot scheduler queue scheduler compensator consists of three parts. Regulators in the queue, using MDRS algorithm to control the output from the adjustment slot to time slot token token scheduler flow returned to normal after a lag, to compensate for the output queue scheduler compensation token. Slot Token scheduler or dispatcher token compensation for each output a token, the token belongs to check whether the channel data stream is in good condition. If the channel is normal, from the regulator output queue corresponding packet data, or discard the token, update lag tag. The algorithm full account of the utilization of the network in the traffic channel can still be improved abnormal increase delay, jitter performance, with good flow isolation, rate control ability.
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