Passive optical network system and its operation method

Abstract

In the configuration of an optical communication system interconnecting a parent station and a plurality of child stations via an optical fiber network equipped with an optical splitter, RE is provided having a measuring unit for measuring a transmission distance or time to a child station, a determining unit for determining a timing when a child station transmits a signal, in accordance with a transmission bandwidth request from the child station, and a signal processing unit for processing a signal received from a child station and transmitting the processed signal to the parent station. When a burst signal is received from each child station at the determined timing, a portion of the header of the burst signal is deleted, and a dummy signal is inserted into the deleted area and a gap area between received burst signals to convert the burst signals into a series of signals to be sent to the parent station.

Description

technical field [0001] The present invention relates to the structure and operating method of an optical passive network system in which multiple user devices share an optical transmission line, and in particular to the structure and operating method of a system suitable for system expansion such as extending transmission distance or increasing accommodated user devices. Background technique [0002] The demand for communication using broadband has increased, and the access line used by users has shifted to a large-capacity access line using optical fiber instead of technology using telephone lines such as DSL (Digital Subscriber Line). At present, from the perspective of line laying and maintenance management costs, PON (Passive Optical Network) system (hereinafter referred to as PON, or optical passive network system, or sometimes called passive optical network) is widely used as an access network. system). The PON uses optical fibers and optical splitters from the centra...

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