Information processing systems--Fibre distributed data interface (FDDI)--Part 1: Token ring physical layer protocol (PHY)
For instance,to ensure reliability of the wireless link,MAC and PHY work together to determine if a clear path exists before they start a transmission.
" Process data highway, type C (PROWAY C), for distributed process control systems--Specification of the single channel phase-continuous-FKS physical (PHY) layer and its interface to the medium"
利用物理层的信道状态信息，该算法将物理层（PHY）的子载波分配同数据链路层（DLL）的数据包业务调度结合起来。
GB/T9469.8-1988分散型过程控制系统用工业过程数据公路单信道相位连续FSK物理(PHY)层及其与媒体接口的规范
