| 主权项 |
1. An access system for an optical fiber network, the access system comprising:
an optical line terminal (OLT); an optical network unit (ONU) connected to the OLT through an optical fiber; and a customer premises equipment connected to the ONU through a non-optical connection, the customer premises equipment being located on a user side; wherein the OLT is configured to assign an upstream time slice and a downstream time slice for the customer premises equipment; wherein the ONU is configured to:
receive a PON (Passive Optical Network) physical layer frame which is sent by the OLT through a PON physical signal, to convert the PON physical layer frame to a first user side physical layer frame corresponding to a non-optical physical signal, and to send the first user side physical layer frame to the customer premises equipment through the non-optical physical signal; orreceive a first user side physical layer frame which is sent by the customer premises equipment through the non-optical physical signal, to convert the first user side physical layer frame to a PON physical layer frame corresponding to a PON physical signal, and send the PON physical layer frame to the OLT through the PON physical signal; and wherein the customer premises equipment comprises:
a user side interface, configured to receive an upstream second user side physical layer frame sent by a user, or send a downstream second user side physical layer frame to the user;a virtual ONU processor, configured to realize a ONU control plane function and a PON MAC function, to encapsulate the upstream second user side physical layer frame into an upstream PON MAC layer frame, to send the upstream PON MAC layer frame to the ONU through a user side physical layer processor according to the upstream time slice assigned by the OLT or receive, according to the downstream time slice assigned by the OLT, a downstream PON MAC layer frame sent by the user side physical layer processor, to convert the downstream PON MAC layer frame to the downstream second user side physical layer frame, and to send the downstream second user side physical layer frame to the user side physical layer processor through the user side interface; andthe user side physical layer processor, configured to convert the upstream PON MAC layer frame sent by the virtual ONU processor to an upstream first user side physical layer frame corresponding to a non-optical physical signal and to send the upstream first user side physical layer frame to the ONU through the non-optical physical signal, or to receive a downstream first user side physical layer frame sent by the ONU, to convert the downstream first user side physical layer frame to the downstream PON MAC layer frame, and to send the downstream PON MAC layer frame to the virtual ONU processor. |
