现场总线访问子层 field bus Access Sublayer ; FAS
介质访问控制子层 MAC ; Media Access Control ; Media Access Control sublayer
媒体访问控制子层 Media Access Control ; MAC
访问控制子层 Media Access Control ; MAC
介质访问控制子层协议 Media Access Control
媒体访问控制子层协议 MAC
链路访问控制子层 Link Access Control Sublayer
和介质访问控制子层 Media Access Control
将介质访问控制子层 Media access control
分析了两个目标层：数据链路层和现场总线访问子层。
Secondly two layers are described in the thesis: the data link layer(DLL) and the fieldbus access sublayer(FAS).
研究现场总线访问子层为通信提供的虚拟通信关系的工作情况和内部协议状态机。
These descriptions include operations of virtual communication relationships which are provided by the FAS for communication, and FAS protocol state machines.
在开放系统互连(osi)参考模型的通信，媒体访问管理执行的媒体访问控制(mac)子层的链路层的。
In the Open Systems Interconnection (OSI) communication reference model, media access management is performed by the media access Control (MAC) sublayer of the Data-Link layer.
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