| Polling Strategy for Wireless Multimedia LANs |
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| 作者姓名： | 杨志军 赵东风 |
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| 作者单位： | Department of Communication Engineering Yunnan University，Department of Communication Engineering Yunnan University，Kunming 650091 China Information Center of Educational and Scientific Institute Educational Department of Yunnan Province Kunming 650223 China，Kunming 650091 China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (No. 60362001) |
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| 摘 要： | Introduction There is an increasing demand for wireless multimedia networks to communicate using any type of media without any geographical restrictions. Therefore, wire- less networks are expected to support multimedia ser- vices with guaranteed quality …
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| 关 键 词： | 无线局域网 媒体存取控制 MAC协议 轮询系统 并行进程 可变包长度 |
| 收稿时间： | 2005-05-10 |
| 修稿时间： | 2005-05-102005-11-21 |
Polling Strategy for Wireless Multimedia LANs |
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| Zhijun Yang, &#x;ý ,Dongfeng Zhao,
ìÎ.Polling Strategy for Wireless Multimedia LANs[J].Tsinghua Science and Technology,2006,11(5):606-610. |
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| Authors: | Zhijun Yang &#x;ý Dongfeng Zhao
ìÎ |
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| Affiliation: | 1. Department of Communication Engineering, Yunnan University, Kunming 650091, China; 2. Information Center of Educational and Scientific Institute, Educational Department of Yunnan Province, Kunming 650223, China |
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| Abstract: | Wireless local area networks (WLANs) are a viable technology for multimedia traffic. One of the most common WLANs standards being adopted as a mature technology is the IEEE 802.11 standard. This paper presents a new polling strategy for wireless multimedia LANs with variable packet lengths, which synchronizes polling and transmission of the information packets. A mathematical model based on imbedded Markov chain theory and the generation function was used to predict the mean queue length and information packet waiting time. The efficiency of the new strategy was validated by mathematical analysis and simulations. The results show that parallel system's mean queue length, information packet waiting time, and polling cycle time are all less than for the non-parallel system and that the improved system is more stable and has greater capacity. |
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| Keywords: | ad hoc network medium access control (MAC) protocols polling system parallel schedule variable packet length |
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