摘要
针对现场总线CAN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。使帧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帧传输的延时不确定性。本文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。
Combined with the technology of the real time field bus, the paper issues a new method of 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-transmission. This is called CSMA/DDPQ. With it the process of collision becomes the process of arbitration, and ensures a limited transmission time and makes maximum delay time adjustable and leads a higher throughput. And the paper builds up a math model for the CSMA/DDPQ and analysis it, and compares with relevant issues such as CSMA, CSMA/CD.
出处
《通信学报》
EI
CSCD
北大核心
2003年第5期64-71,共8页
Journal on Communications
基金
国家自然科学基金资助项目(69775022)
863计划资助项目(863-306-ZT04-06-3)
