Operation support sub-system uses ZXR10 ROS platform including system support,
system control, version loading control, BSP, and SSP. System support can be further
divided into modules of operation system kernel, process scheduling, process
communication, timer management, and memory management. The system diagram of
operation support sub-system is shown in the following figure:
Figure 4-7 System framework diagram
4.3.2 MUX Sub-system
MUX sub-system implements information switching of drive and upper layer software,
and takes statistics and monitoring of software table of switching chip. The main functions
of MUX sub-system are data forwarding and statistics monitoring. MUX layer receives
data packets from drive module and distributes data packets based on ETHER TYPES
field in MAC frame. MUX data forwarding also takes charge of encapsulating data
forwarding function of the drive. It provides new data forwarding function invoking for
each module in upper layer, which invokes data forwarding function provided by MUX to
implement forwarding when there’s data packet or protocol packet needs to be forwarded.
Statistics monitoring takes charge of state statistics of drive layer, physical layer and
MUX layer, receiving and sending packets statistics, register reading monitoring, and
data packet sniffer. It provides OAM module with interface function.
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