| An IEEE 802.3 Compatible Real Time Medium Access Control with Length-based Priority |
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| 作者姓名： | 尹汝泼 蔡云泽 张卫东 |
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| 作者单位： | Dept. of automation, Shanghai Jiaotong University, Shanghai 200030 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | IntroductionEthernet has become the most successful LANtechnology today .It is even regarded as the core to conceiveunified data communication systemin the future . However ,due to the non-deterministic essence of CSMA/CD,Ethernetis unsuitable for applications with stringent ti me constrains ,as inindustrial floors , where violation of such requirementswill result in great degradation of system performance oreven make whole systemparalyzed .Determinismproblemhas been studiedinthelast decad…
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| 关 键 词： | 实时以太网 媒体存取控制 动态优先数 优先购买权 IEEE 802.3 |
| 收稿时间： | 2004-10-14 |
An IEEE 802.3 Compatible Real Time Medium Access Control with Length-based Priority |
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| YIN Ru-po,CAI Yun-ze,ZHANG Wei-dong.An IEEE 802.3 Compatible Real Time Medium Access Control with Length-based Priority[J].Journal of Donghua University,2006,23(1):89-93. |
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| Authors: | YIN Ru-po CAI Yun-ze ZHANG Wei-dong |
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| Abstract: | A new medium access control method is proposed over the predominant Ethernet broadcast channel. Taking advantages of intrinsic variable length characteristic of standard Ethemet frame, message-oriented dynamic priority mechanism is established. Prioritized medium access control operates under a so-called block mode in event of collisions. High priority messages have a chance to preempt block status incurred by low priority ones. By this means, the new MAC provides a conditional detrministic real time performance beyond a statistical one. Experiments effectiveness and attractiveness of the proposed scheme.Moreover,this new MAC is completely compatible with IEEE802.3 . |
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| Keywords: | real time Ethernet medium access control dynamic priority channel blocking preemption |
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