Extender, data transmission method and passive optical network system

Abstract

The embodiment of the invention discloses an extender. The extender comprises a downlink data sending module, at least two uplink data receiving modules, a data convergence module and a duplexer, wherein the downlink data sending module is used for sending downlink data to an optical network unit; the at least two uplink data receiving modules are used for receiving uplink data sent by the corresponding optical network unit; the data convergence module is used for converging the uplink data received by the uplink data receiving modules; the duplexer realizes single-fiber bidirectional transceiving; ports of the uplink data receiving modules connected with uplink ports of the optical network unit correspond to the uplink ports of the optical network unit one by one; and the ports of the uplink data receiving modules connected with the uplink ports of the optical network unit are separated from ports of the downlink data sending module connected with downlink ports of the optical network unit. Meanwhile, the embodiment of the invention also discloses a data transmission method and a passive optical network system. Through the embodiment of the invention, the extender realizes conversion and adaptation from double fibers of a household BS to a single fiber of a PON.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an extender, a data transmission method and a passive optical network system. Background technique [0002] Optical fiber has the advantages of wide transmission frequency, large capacity, low loss and strong anti-interference ability, and is very suitable as a transmission medium for high-speed and broadband services. Among various optical access technologies, Passive Optical Network (PON), as a currently used optical access technology, is attracting more and more attention. [0003] PON technology is a point-to-multipoint (Point to Multi-point, P2MP) optical access technology, which consists of an optical line terminal (Optical Line Termination, OLT), an optical splitter, an optical network unit (Optical Network Unit, ONU ) / Optical Network Termination (ONT) and the optical fiber connecting this device. As a central office device, the OLT is connected to an optical splitte...

AI Technical Summary

Problems solved by technology

However, when the ONU device fails and does not respond to the authorization of the OLT and randomly or permanently occupies the uplink channel, or when a malicious ONU occupies the uplink channel at will, the PON will fall into a paralyzed state, thereby affecting the normal operation of the 802.16 base station

Due to the passive characteristics of branch nodes, it is impossible to locate the ONU device on which branch has a problem

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