Patent ID: 8406636

Claim:
A system for passive optical network (PON) data transmission, connected to a service network, and comprising at least one first optical network unit (ONU), a central office optical line terminal (OLT) (S-OLT), and a local OLT (L-OLT), wherein the S-OLT and the L-OLT are connected through a transmission link to form a transmission network; the S-OLT is adapted to connect to the service network, receive service data sent by the service network, and send the service data to the L-OLT through a transmission channel of the transmission network, wherein sending the service data to the L-OLT through the transmission channel of the transmission network comprises: encapsulating the service data to be sent to the L-OLT into a Gigabit PON (GPON) encapsulation method (GEM) frame, and then mapping the GEM frame to the transmission channel, wherein the transmission channel is any one of an Virtual Container (VC) channel of the Synchronous Digital Hierarchy (SDH), an Virtual Tributary (VT) channel of the (Synchronous Optical Network) SONET, the Optical channel Data Unit k (ODUk) of the Optical Transport Network (OTN), the Dynamic synchronous Transfer mode (DTM) time slot channel, and the Virtual Path Identifier (VPI) channel of the Asynchronous Transfer Mode (ATM); and receive service data sent by the L-OLT from the transmission channel of the transmission network, and send the service data to the service network; and the L-OLT is adapted to receive the service data sent by the S-OLT from the transmission channel of the transmission network, and send the service data to a first ONU; and receive service data sent by the first ONU, and send the service data to the S-OLT through the transmission channel of the transmission network.