Aggregation node device of passive optical network and passive optical network system

A passive optical network (PON) system, comprising a user-side optical network unit (ONU), an aggregation node device, and a network-side optical line terminal (OLT), wherein

• the user-side ONU is adapted to transmit service data transmitted by a customer premises equipment (CPE) to the aggregation node device;
• the aggregation node device is adapted to aggregate the service data transmitted by the user-side ONU;
• and
• the network-side OLT is adapted to re-aggregate service data from more than one aggregation node device;
• wherein aggregation node device comprises an aggregation OLT and an aggregation ONU;
• the aggregation OLT is , connected to the user-side ONU, aggregates the service data transmitted by the user-side ONU, and transmits the aggregated service data to the aggregation ONU;
• and
• the aggregation ONU is adapted to transmit the received aggregated service data to the network-side OLT.

A method for transmitting data in a passive optical network (PON) system, comprising:

• receiving, by an aggregation node device, service data from a customer premises equipment (CPE) forwarded by a user-side optical network unit (ONU);
• and
• aggregating, by the aggregation node device, the received service data, and transmitting the aggregated service data to a network-side optical line terminal (OLT) for re-aggregation;
• wherein the aggregation node device comprises an aggregation OLT and an aggregation ONU, and
• the aggregating, by, the aggregation node device, the received service data, and transmitting the aggregated service data to the network-side OLT further comprises:
• aggregating, by the aggregation OLT, the service data transmitted by the user-side ONU and transmitting the aggregated service data to the aggregation ONU;
• and transmitting, by the aggregation ONU, the received aggregated service data to the network-side OLT.