| 摘要 |
The present invention is directed towards a merging unit comprising a first medium access controller(MAC), a second medium access controller, a physical layer transceiver (PHY) and an Ethernet port, wherein the first MAC is adapted to identify and forward packets for time synchronism, and the PHY is adapted to forward data received from the Ethernet port to the first MAC and the second MAC, and to transmit through the Ethernet port, packets from the first MAC and/or the second MAC. The packets from the first MAC have higher priority than the packets from the second MAC. The first MAC, and the PHY are implemented in a FPGA chip. In the merging unit, a single Ethernet fiber link may be shared for time synchronization and MU system configuration, testing and/or online diagnosis, while ±1 us time synchronization precision is guaranteed. |
