An IEEE 802.3 Compatible Real Time Medium Access Control with Length-based Priority  

作　　者：尹汝泼 蔡云泽 张卫东 

机构地区：[1]Dept.of automation,Shanghai Jiaotong University, Shanghai 200030

出　　处：《Journal of Donghua University(English Edition)》2006年第1期89-93,共5页东华大学学报（英文版）

基　　金：This workis partly supported by national 863 project under grant 2002 AA412010 08

摘　　要：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 .A new medium access control method is proposed over the predominant Ethernet broadcast channel. Taking advantages of intrinsic variable length characteristic of standard Ethernet 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 deterministic real time performance beyond a statistical one. Experiments demonstrate effectiveness and attractiveness of the proposed scheme. Moreover, this new MAC is completely compatible with IEEE802.3.

关 键 词：real time Ethernet medium access control dynamic priority channel blocking preemption. 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]