COMMUNICATION NODE SYSTEM IN ETHERNET PASSIVE OPTICAL NETWORK, CONTROL NODE SYSTEM, AND COMMUNICATION SYSTEM THEREOF

摘要

PURPOSE: A communication node system in an EPON(Ethernet Passive Optical Network), a control node system, and communication system thereof are provided to easily perform point-to-point communication under a point-to-multipoint communication environment through an LLID(Logical Link Identification), thereby easily supporting a data transceiving process between communication node systems as using an existing Ethernet protocol. CONSTITUTION: An LLID register(113) stores an assigned LLID. A PON preamble generator(111) generates a PON preamble by using the LLID. A CRC(Cyclic Redundancy Check) generator(112) generates a CRC for the preamble. A GMII transmission connector(114) combines transmission data with the preamble, generates a transmission frame, and transmits the transmission frame to a network. A GMII reception connector(115) separates a reception frame into a preamble and reception data. An LLID filtering processor(118) extracts an LLID value from the preamble, compares the extracted LLID with the LLID stored in the LLID register(113), and selectively filters the extracted LLID. A reception frame generator(121) abandons the reception data, or combines the reception data with the preamble, and generates a reception frame.