Optical line termination, PON system, and data reception processing method

An internal device and data technology, applied in the field of in-station devices, can solve the problems of long preparation period and waste of frequency band, and achieve the effect of shortening the preparation period

Inactive Publication Date: 2012-05-23
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the longer the preparation period is, the more the bandwidth is wasted

Method used

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  • Optical line termination, PON system, and data reception processing method
  • Optical line termination, PON system, and data reception processing method
  • Optical line termination, PON system, and data reception processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] figure 1 It is a diagram showing an example of the functional configuration of the first embodiment of the on-site device (OLT) according to the present invention. The OLT of this embodiment is connected to a plurality of ONUs via optical couplers and optical fibers. figure 1 Indicates constituent elements that implement operations of the data processing method according to the present invention. like figure 1 As shown, the OLT of this embodiment includes: a data reproducing unit 1 that extracts a clock from data (burst data) intermittently received from the ONU and reproduces the data; a fixed pattern generating unit (data generator or pattern signal generator) 2 , generate fixed data; data selector (data selector) 3, decide output data according to the presence or absence (reception period) of the burst data of receiving; SERDES part 4; And upstream time slot management part 5, has the sending The function of timing is to control the access of PON, judge whether th...

Embodiment approach 2

[0055] Figure 8 It is a diagram showing an example of a functional configuration of Embodiment 2 of an on-site device (OLT) according to the present invention. like image 3 As shown, the in-station device of the present embodiment is the same as the in-station device of the first embodiment except that the uplink slot management unit 5a of the first embodiment is replaced with the uplink slot management unit 5 of the first embodiment, and a block synchronization detection unit 8 is added. Components having the same functions as those in Embodiment 1 are denoted by the same symbols as in Embodiment 1, and description thereof will be omitted.

[0056] This embodiment differs from Embodiment 1 in that a burst end instruction signal is output from the block synchronization detection unit 8 . Other operations of this embodiment are the same as those of the first embodiment. Figure 9 It is a figure which shows an example of the operation|movement of this embodiment. in additi...

Embodiment approach 3

[0063] Figure 11 It is a diagram showing an example of the functional configuration of the third embodiment of the on-site device (OLT) according to the invention. like Figure 5 As shown, the in-station device of this embodiment is the same as the in-station device of the second embodiment except that the block synchronization detection unit 8 of the second embodiment is provided inside the data selection unit 3a, and the data selection unit 3 is replaced by the data selection unit 3a. Components having the same functions as in Embodiment 1 or Embodiment 2 are given the same symbols as in Embodiment 1 or Embodiment 2, and descriptions thereof are omitted.

[0064] In the present embodiment, similarly to Embodiment 2, the data selection unit 3a is switched based on the burst end instruction signal output from the block synchronization detection unit 8, but the block synchronization detection unit 8 is set as an internal part of the data selection unit 3a. Function. With su...

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PUM

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Abstract

An optical line termination comprising a deserializer (41) for parallelizing burst data received from an optical network unit is provided with a fixed pattern generating section (2) for generating fixed pattern data which is predetermined fixed data, and a data selection section (3) for selecting one of the fixed pattern data or the burst data and inputting the selected data to the deserializer (41) as data to be parallelized according to a data head indicating signal indicating the head of the burst data and a data end indicating signal indicating the end of the burst data.

Description

technical field [0001] The present invention relates to a device in a station in a PON (Passive Optical Network: Passive Optical Network) system and a data receiving and processing method. Background technique [0002] In the PON system, optical couplers and optical fibers are used to connect multiple terminal devices (ONU: Optical Network Unit (ONU) unit), ONT: Optical Network Termination (optical network terminal)). Furthermore, each ONU transmits data in time division, thereby performing access control so that no collision of data occurs in the photocoupler. Thus, data is intermittently received in the OLT. The OLT extracts a clock from the intermittently received data to reproduce the data. Then, a SERDES (Serializer / Deserializer, Serializer / Deserializer) of the OLT extracts a clock from the reproduced data to parallelize the data. [0003] A circuit that extracts a clock from the received data and reproduces data (hereinafter referred to as a data reproduction circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04L12/44H04B10/50
CPCH04J3/0682H04L7/042H04L2007/045H04L7/043H04B10/50H03L7/08H04B10/61
Inventor 名仓健一铃木巨生杉村浩史
Owner MITSUBISHI ELECTRIC CORP
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