Passive optical network and optical network unit optical module thereof

Abstract

The invention discloses a passive optical network and an optical network unit optical module thereof. The optical module comprises a laser receiving unit, an MAC (medium access control) protocol processing unit and a PHY (physical layer) unit. The laser receiving unit is used for outputting a corresponding electric signal according to a downlink optical signal sent from an OLT (optical line terminal). The MAC protocol processing unit is used for performing MAV protocol processing to the electric signal received by the laser receiving unit and then outputting the processed data. The PHY unit is used for packaging the received data from the MAC protocol processing unit into data frames and then sending the data frames to user terminal equipment through network cables. Since the MAC protocol processing unit and the PHY unit are integrated in the optical network unit optical module, MAC protocol conversion of the Ethernet and a data transmission function of a local area network can be realized, the optical network unit optical module can be connected with the user terminal equipment directly, optical network unit system equipment is omitted from the network, and accordingly cost of the optical network is reduced greatly.

Description

Technical field [0001] The invention relates to optical fiber communication technology, in particular to a passive optical network and its optical network unit optical module. Background technique [0002] In the current domestic and international markets, high-bandwidth, high-speed, and multi-service integration of optical fiber communications have begun to be applied; among many solutions, the emergence of fiber to the home (FTTH) is considered the ultimate broadband access solution. [0003] However, a large number of FTTB (fiber to the building) or FTTC (fiber to the roadside) networks have been laid out in the country. FTTB / FTTC is a network of a hybrid optical / copper cable system, such as figure 1 As shown, from the central office's OLT (Optical Line Terminator, optical line terminal) to the roadside or building within a thousand feet away from the home or office, optical cables are used for signal transmission; through switches and coaxial cables, Pass the signal from the s...

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Problems solved by technology

[0005] However, the inventors of the present invention have found that because the FTTH network of the prior art needs to be equipped with an ONU system device for each ONU optical module at the central office, the cost of investing in the network upgrade process is relatively high, and the ONU system device needs to occupy a large external space

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