摘要： 结合现场总线技术提出了在媒体访问控制方式中利用分布式动态优先权队列和非破坏性优先权逐位仲裁规则解决CSMA方式中的冲突重发问题。使报文冲突的过程变为优先权仲裁的过程,提高了信道的使用率和解决了报文传输的延时不确定性。针对这种新的访问控制-方式建立了数学模型进行了解析,并与相关的访问控制方式进行了比较。

关键词: 通信, 优先权, 网络, 排队论

Abstract: Combined with the technology of the real-time field bus, this paper issues a method of the medium access by using the distributed dynamical priority queue and non-destroyed priority bit-by-bit arbitrate regulation in order to solve the problem of collisions and re-transmit. This is called CSMA/DDPQ. Thus, the process of collision becomes the process of arbitration, which leads to a higher access performance and ensures a dead time of transmit delay. And the paper, for the CSMA/DDPQ, builds up and analyses a math model and compares it with the relevant issues such as CSMA and CSMA/CD.

中图分类号: 

• TN915.04