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PON (passive optical network) system, entrant side terminal device, station side terminal device and electric power saving method

A technology for terminal devices and joiners, which is applied in multiplexing system selection devices, transmission systems, selection devices, etc., can solve problems such as wasting power, and achieve the effect of reducing power consumption

Active Publication Date: 2016-02-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even when data communication is not being performed, power is wasted when the ONU is always in a state where communication is possible for round-trip time measurement

Method used

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  • PON (passive optical network) system, entrant side terminal device, station side terminal device and electric power saving method
  • PON (passive optical network) system, entrant side terminal device, station side terminal device and electric power saving method
  • PON (passive optical network) system, entrant side terminal device, station side terminal device and electric power saving method

Examples

Experimental program
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Effect test

Embodiment approach 1

[0029] figure 1 It is a diagram showing a configuration example of Embodiment 1 of the PON system of the present invention. Such as figure 1 As shown, the PON system of the present embodiment includes an OLT 1 ​​and ONUs 10 - 1 to 10 - 3 . The OLT 1 ​​and the ONUs 10 - 1 to 10 - 3 are connected by a subscriber line 30 via a splitter 40 . The splitter 40 branches the subscriber line 30 connected to the OLT1 into the number of ONU10-1 - 10-3. In addition, ONU10-1 is connected to terminals 20-1 and 20-2. In addition, here, an example in which three ONUs are used is shown, but the number of ONUs is not limited to this and may be arbitrary.

[0030] OLT1 comprises: PON control part 2, implements the processing of OLT side according to PON agreement; As the buffer receiving buffer 3 that is used to preserve the uplink data that ONU10-1~10-3 receives; As used to preserve ONU10-1 ~10-3 Transmit buffer 4 of buffer for downlink data sent; optical transceiver 5, for sending and rece...

Embodiment approach 2

[0081] Figure 12 It is a timing chart showing an example of the power saving control procedure in Embodiment 2 of the PON system of the present invention. The configuration of the PON system of the present embodiment is the same as that of the PON system of the first embodiment. In addition, the configurations of the OLT and the ONU of the present embodiment are also the same as those of the OLT 1 ​​and the ONUs 10 - 1 to 10 - 3 of the first embodiment. Hereinafter, points different from Embodiment 1 will be described.

[0082] In Embodiment 1, when there is no downstream data addressed to ONU#i, OLT1 transmits a downstream power-saving state transition request to ONU#i. In this case, an uplink power-saving state transition request is sent to OLT1.

[0083] In addition, in Embodiment 1, the sleep mode related to communication in the upstream direction is described as a request from the ONU to transition to the sleep mode, but in Embodiment 1, it is not determined when the ...

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Abstract

A PON (passive optical network) system is characterized in that an ONU (optical network unit) (10) comprises a receiving buffer (13) used for storing signals sent by an OLT (optical line terminal) (1) in the down direction as well as a PON control part (11) used for controlling migration of the receiving buffer (13) to an electric power saving state and a general state; the OLT (1) comprises a sending buffer (4) used for storing sending data sent to the ONU(10) as well as a PON control unit, when the condition that the sending buffer (4) is free of sending data sent to the ONU(10) is judged, the PON control unit sends a down electric power saving state migration request for requesting migration to the down electric power saving state to the ONU (10), and the PON control part (11) sets the receiving buffer (13) in the electric power saving state in the specified down dormancy period requested according to the down electric power saving state migration request.

Description

[0001] This application is a divisional application with an application date of August 21, 2009, application number 200980161040.1, and an invention titled "PON system, subscriber-side terminal device, station-side terminal device, and power-saving method". technical field [0002] The present invention relates to a PON (Passive Optical Network, Passive Optical Network) system composed of an OLT (Optical Line Terminal: station-side terminal device) and a plurality of ONUs (Optical Network Unit (optical network unit): a subscriber-side terminal device). Background technique [0003] In the PON system, communication is performed while synchronizing between the OLT and the ONU so that data in the upstream direction transmitted from the ONU does not collide. The OLT plans to provide transmission permission for each ONU so that data in the upstream direction does not collide. At this time, the delay due to the distance from each ONU is considered. For this reason, the OLT measur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04Q11/00
CPCH04L12/40013H04Q11/0067H04Q2011/0079
Inventor 向井宏明弥荣香织杉村浩史
Owner MITSUBISHI ELECTRIC CORP