利用物理層的通道狀態資訊，該演算法將物理層（PHY）的子載波分配同資料鏈路層（DLL）的資料包業務排程結合起來。
" 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"
GB/T9469.8-1988分散型過程控制系統用工業過程資料公路單通道相位連續FSK物理(PHY)層及其與媒體介面的規範
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.
Information processing systems--Fibre distributed data interface (FDDI)--Part 1: Token ring physical layer protocol (PHY)
