Working Principles for Downstream Transmission
Figure 1 shows
the 10G
GPON working principles for downstream transmission.
Figure 1 Working
principles for downstream transmission ![]()
In the downstream direction, the
OLT broadcasts data to all ONUs and the ONUs
receive only desired data.
Data flow forwarding in the downstream direction
Figure 2 Data flow
forwarding in the downstream direction ![]()
- On the OLT, data flows are encapsulated into GEM ports in service processing
units.
- The OLT broadcasts the data to in the GEM ports to all ONUs.
- The ONU determines whether to process or discard the data according to the
XGEM port ID.
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