WO2009081597A1 - 加入者宅側光回線終端装置 - Google Patents

加入者宅側光回線終端装置 Download PDF

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Publication number
WO2009081597A1
WO2009081597A1 PCT/JP2008/054346 JP2008054346W WO2009081597A1 WO 2009081597 A1 WO2009081597 A1 WO 2009081597A1 JP 2008054346 W JP2008054346 W JP 2008054346W WO 2009081597 A1 WO2009081597 A1 WO 2009081597A1
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WO
WIPO (PCT)
Prior art keywords
serial
unit
optical
signal
onu
Prior art date
Application number
PCT/JP2008/054346
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English (en)
French (fr)
Japanese (ja)
Inventor
Katsuya Aboshi
Kazutaka Shimoosako
Kunio Odaka
Original Assignee
The Furukawa Electric Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Furukawa Electric Co., Ltd. filed Critical The Furukawa Electric Co., Ltd.
Priority to CN200880000869.9A priority Critical patent/CN101584156B/zh
Publication of WO2009081597A1 publication Critical patent/WO2009081597A1/ja
Priority to HK10102918.3A priority patent/HK1134870A1/xx

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring

Definitions

  • the present invention relates to a subscriber premises optical line terminator installed in a subscriber premises in a PON type optical transmission system.
  • an optical transmission path connected to a center is branched by a passive splitter, and an optical transmission path is laid to a plurality of subscriber homes.
  • a PON (Passive-Optical-Network) type optical transmission system is used.
  • Such an optical transmission system is also called PDS (Passive Double Double Star).
  • a center optical line termination device (OLT: Optical Line Termination) 901 is connected to a multiplexing end of a splitter 903 via an optical fiber 902, and a plurality of splitters 903 are connected.
  • OLT Optical Line Termination
  • ONU Optical Network Units
  • FIG. 9 The configuration of ONU905-1,... 905-n is shown in FIG.
  • This figure shows the configuration of the ONU 905-1 as an example, and the ONU 905-1 includes an optical transceiver unit 906, an ONU function unit 907, and an Ethernet (registered trademark) interface 908.
  • An optical fiber 904-1 connected to the splitter 903 is connected to the optical transceiver unit 906 via an optical termination unit 909 provided in each subscriber's house.
  • Ethernet (registered trademark) interface 908 10/100 / 1000BASE-TX or the like can be used, and for example, a LAN cable 910 is connected thereto.
  • a terminal device 914 such as a computer or a printer can be directly connected to the LAN cable 910, or a switch such as a router 912 or a switching hub 913 can be connected to another terminal device 914.
  • JP-A-9-214541 JP-A-9-214541
  • an object of the present invention is to provide a subscriber premises optical line terminator capable of reading and setting operation information using a serial interface. .
  • the first aspect of the subscriber premises optical line terminator according to the present invention is connected to the center side optic line terminator via an optical transmission line and connected to an external node via a signal line to perform termination processing.
  • An optical line terminator which is connected to the center side optical line terminator and performs photoelectric conversion and reverse photoelectric conversion of a main signal; and is connected to the electric / optical conversion unit and is connected to the main signal.
  • An optical line terminator function unit that performs signal termination processing, a serial / parallel conversion unit that is connected to the optical line terminator function unit and performs serial / parallel conversion and inverse serial / parallel conversion of the main signal, and the serial A main signal IF (interface) unit that is connected to the parallel / parallel conversion unit and inputs / outputs the main signal to / from the external node, a first serial IF unit that inputs / outputs a predetermined serial signal, and power supply
  • the And an interface module having a power supply IF unit connected to a power supply line and a ground line, and when a predetermined condition is satisfied, a first serial signal terminal provided in the optical line terminator function unit;
  • the first serial IF unit is electrically connected.
  • the predetermined condition is satisfied when a predetermined voltage is applied to the ground line, and the first condition is satisfied when the predetermined condition is not satisfied.
  • the serial signal terminal and the first serial IF section are electrically cut off.
  • the apparatus when the predetermined condition is satisfied, switching is performed to electrically connect the first serial signal terminal and the first serial IF unit.
  • the apparatus further comprises means.
  • the switching means connects the first serial IF unit and the first serial signal terminal when the predetermined condition is satisfied. It is a switch circuit that is electrically connected and otherwise electrically cuts off between the first serial IF section and the first serial signal terminal.
  • the switch circuit is provided in the first serial IF unit and the electrical / optical conversion unit when the predetermined condition is not satisfied.
  • the second serial signal terminal is electrically connected.
  • the interface module further includes a second serial IF unit, and the second serial IF unit is provided in the electrical / optical conversion unit. Further, the second serial signal terminal is connected.
  • the first serial signal end and the second serial signal end provided in the electrical / optical conversion unit are connected to the first serial IF unit.
  • the switching means determines that the predetermined condition is satisfied, the access from the first serial IF section to the optical line terminator function section via the first serial signal end It is characterized by permitting.
  • the first serial signal terminal and the first serial IF unit are connected by I2C.
  • the second serial signal terminal and the first serial IF unit are connected by I2C.
  • a subscriber premises optical line terminating device capable of reading and setting operation information by switching the serial interface to be usable.
  • FIG. 1 is a block diagram showing a configuration of a subscriber premises optical line termination unit (ONU) according to the first embodiment of the present invention.
  • FIG. 2 shows an example of a PON type optical transmission system configured using the ONU 100 of this embodiment shown in FIG.
  • the PON interface card 10 provided in the center has an optical line terminator (OLT) 11 and an authentication function unit 12, and performs optical transmission to the optical input / output terminal of the OLT 11.
  • OLT optical line terminator
  • One end of the optical fiber 20 that is a path is connected.
  • the optical coupler (optical multiplexing / demultiplexing unit) 30 has one multiplexing end and two or more demultiplexing ends. The other end of the optical fiber 20 connected to the OLT 11 is connected to the multiplexing end. It is connected.
  • each of a plurality of optical fibers 40-1,..., 40-n (n: natural number, hereinafter referred to as 40-1 to n) is connected to the demultiplexing end of the optical coupler 30, and the other end Are connected to ONUs 50-1 to 50-n.
  • the downstream signal from the OLT 11 is demultiplexed by the optical coupler 30 and transmitted to each of the ONUs 50-1 to 50-n, while the optical signal transmitted from each of the ONUs 50-1 to 50-n is transmitted to the optical coupler 30.
  • the OLT 11 is demultiplexed by the optical coupler 30 and transmitted to each of the ONUs 50-1 to 50-n, while the optical signal transmitted from each of the ONUs 50-1 to 50-n is transmitted to the optical coupler 30.
  • Each of the ONUs 50-1 to 50-n is installed in each subscriber's house, and an external node 70 such as a personal computer or a switch is connected to the ONUs.
  • the external node 70 is a switch, and a plurality of terminal devices 80 are connected to a plurality of ports 70a provided in the switch.
  • the switch used for the external node 70 include an L2 switch, an L3 switch, and a router. With such a configuration, a plurality of terminal devices 80 can be connected to the center OLT 11 via the ONU 100.
  • the OLT 11 and ONUs 50-1 to 50-n are GPON (abbreviation for Gigabit Passive Optical Network, compliant with ITU standard G.984.x), GEPON (Gigabit Ethernet (registered trademark) PON), and IEEE802. A device that conforms to the 3) standard) is used.
  • the ONU 100 of the present embodiment can be used for the ONUs 50-1 to 50-n shown in FIG. In the following, it is assumed that the ONU 100 is used as the ONU 50-1.
  • the ONU 100 of this embodiment includes an electrical / optical converter (TRx) 110, an optical line terminator function unit (hereinafter referred to as an ONU function unit) 120, and a serial / parallel converter (SERDES) 130. And an interface module 140.
  • TRx electrical / optical converter
  • ONU function unit optical line terminator function unit
  • SERDES serial / parallel converter
  • first serial transmission lines 150a (downstream signal lines) and 150b (upstream signal lines) for transmitting serial electrical signals between the electrical / optical conversion section 110 and the ONU function section 120.
  • the ONU function unit 120 and the serial / parallel conversion unit 130 are connected by parallel transmission paths 151a (downstream signal lines) and 151b (upstream signal lines) for transmitting parallel electric signals.
  • the parallel signal transmitted through the parallel transmission paths 151a and 151b can be, for example, a 10-bit signal.
  • the serial / parallel converter 130 and the interface module 140 are connected by second serial transmission lines 152a (downstream signal lines) and 152b (upstream signal lines) for transmitting serial electrical signals.
  • the electrical / optical converter 110 has an optical input / output terminal for transmitting and receiving an optical signal to and from the center-side OLT 11 via the optical fiber 40, and the light of the main signal transmitted from the center OLT 11.
  • the signal (downstream signal) is converted into an electrical signal (photoelectric conversion).
  • This electrical signal is output to the ONU function unit 120 via the first serial transmission line 150a which is a downstream signal line.
  • the electrical / optical conversion unit 110 converts the electrical signal of the main signal input from the ONU function unit 120 via the first serial transmission line 150b that is an upstream signal line into an optical signal (reverse photoelectric conversion). .
  • This optical signal is transmitted to the OLT 11 via the optical fiber 40.
  • the ONU function unit 120 converts the serial signal input from the electrical / optical conversion unit 110 into a parallel signal, performs a predetermined termination process, and then converts this signal to a serial / parallel via a parallel transmission path 151a that is a downstream signal line.
  • the data is output to the conversion unit 130.
  • the ONU function unit 120 converts the parallel signal input from the serial / parallel conversion unit 130 through the parallel transmission path 151b, which is an upstream signal line, into a serial signal after performing a predetermined termination process, thereby converting the electrical / optical
  • the data is output to the conversion unit 110.
  • the serial / parallel conversion unit 130 includes serial / parallel conversion means and reverse serial / parallel conversion means (not shown).
  • the parallel signal input from the ONU function unit 120 is converted into a serial signal by the reverse serial / parallel conversion means.
  • the data is output to the interface module 140 via the second serial transmission line 152a which is a downstream signal line.
  • the serial / parallel converter 130 converts the serial signal input from the interface module 140 via the second serial transmission path 152b into a parallel signal by the serial / parallel converter and outputs the parallel signal to the ONU function unit 120. .
  • the interface module 140 is connected to the external node 70 by a serial electric signal.
  • the interface module 140 corresponds to the MSA (Multi-Source Agreement) interface standard, and can be directly connected to an MSA interface slot (not shown) provided in the external node 70. It is configured. Examples of MSA interface standards include GBIC and SFP.
  • the interface module 140 includes a main signal IF unit 141, a first serial IF unit 142, a second serial IF unit 143, and a power feeding IF unit 144.
  • Second serial transmission lines 152 a and 152 b that are connected to the serial / parallel conversion unit 130 and transmit a main signal input / output to / from the external node 70 are connected to the main signal IF unit 141.
  • the ONU function unit 120 and the electrical / optical conversion unit 110 include a first serial signal terminal 121 and a second serial signal terminal 111, respectively, and the first serial IF unit 142 and the second serial signal terminal 111, respectively. It is connected to the IF unit 143.
  • the signal lines 161a and 161b between the second serial signal terminal 111 and the second serial IF unit 143 are configured by I2C.
  • An I2C (Inter Integrated Circuit) signal line is composed of two signal lines, a serial data transmission signal line 161a and a clock transmission signal line 161b.
  • a power supply line 162 a and a ground line 162 b are connected to the power supply IF unit 144.
  • the interface module 140 When the interface module 140 is connected to the external node 70, the ground line 162b is grounded, and power is supplied from the external node 70 to the ONU 100 via the power supply line 162a.
  • the signal lines 160 a and 160 b are also connected to the first serial signal terminal 121 of the ONU function unit 120, and the other ends of these signal lines are connected to the first serial IF unit 142. ing.
  • switch circuits 170a and 170b are provided in the middle of the signal lines 160a and 160b.
  • relays, switches, and diodes are used as the switch circuits 170a and 170b.
  • I2C signal lines can be used similarly to the signal lines 161a and 161b.
  • a GPIO signal line connected to a GPIO terminal (not shown) of the ONU function unit 120 may be used.
  • the switch circuits 170a and 170b branch and connect the ground line 162b in order to input a control signal.
  • the voltage applied to the ground line 162b is used as a control signal and the signal lines 160a and 160b are energized. It is controlled to shut off. That is, when the ground line 162b is grounded, the switch circuits 170a and 170b are cut off and the signal lines 160a and 160b are cut off. On the other hand, when a predetermined voltage is applied to the ground line 162b, the switch circuits 170a and 170b are energized and the signal lines 160a and 160b can be energized.
  • the ONU 100 In the normal operation of the ONU 100, the ONU 100 is connected to the MSA interface slot of the external node 70, and at this time, the ground line 162 b is grounded via the external node 70. As a result, the switch circuits 170a and 170b are cut off and the signal lines 160a and 160b are cut off. Therefore, when the ONU 100 is connected to the external node 70, signals cannot be transmitted / received between the first serial signal terminal 121 of the ONU function unit 120 and the first serial IF unit 142.
  • a test device used for manufacturing or maintaining the ONU 100 can be configured to apply a predetermined voltage to the ground line 162b when the ONU 100 is connected.
  • FIG. 3 shows a state in which the ONU 100 is connected to the test equipment configured as described above.
  • the signal lines 160a and 160b are I2C signal lines like the signal lines 161a and 161b
  • the signal line 160a is a signal line for serial data transmission
  • the signal line 160b is a signal line for clock transmission.
  • the signal lines 160a and 160b may be either signal lines that are used only when test equipment is connected, or signal lines that are used for other purposes during normal operation.
  • the signal lines 160a and 160b are signal lines that are used only when a test device is connected.
  • the signal lines 160a ′ and 160b ′ are electrically connected to a predetermined processing unit 190 during normal operation, and are used for other purposes. ing.
  • a rate control signal, a LOS (Loss of Signal) signal, or the like may be transmitted from the predetermined processing unit 190 to the first serial IF unit 142 during normal operation, for example, using a GPIO signal.
  • the signal lines 160a ′ and 160b ′ are switched to the connection between the ONU function unit 120 and the first serial IF unit 142 by the switch circuits 170a ′ and 170b ′.
  • the function of the processing unit 190 can also be realized by the ONU function unit 120 and the serial / parallel conversion unit 130.
  • the test device 180 shown in FIG. 3A includes an applied voltage unit 181 and a serial signal input / output unit 182.
  • the ground line 162b is connected to the applied voltage unit 181 through the power supply IF unit 144 and a predetermined voltage is applied, and the signal line 160a is connected to the serial signal input / output unit 182.
  • the switch circuits 170a and 170b are switched to the energized state by detecting that a predetermined voltage is applied to the ground line 162b.
  • the serial signal input / output unit 182 can access the ONU function unit 120 via the signal line 160a, and inputs operation information of the ONU function unit 120 or outputs a predetermined set value to output the ONU function unit 120. Can be set. The same switching is performed when the ONU 100 ′ shown in FIG. 3B is connected to the test equipment 180.
  • the signal lines 160 a and 160 b and the switch circuits 170 a and 170 b are provided between the first serial signal terminal 121 of the ONU function unit 120 and the interface module 140, and the external node 70.
  • the switch circuits 170a and 170b are shut off so that the first serial IF unit 142 cannot access the ONU function unit 120.
  • the ONU function unit 120 can be accessed in an energized state. As a result, security during normal operation is enhanced, and operation information of the ONU 100 can be read and set during the manufacture or maintenance of the ONU 100.
  • FIG. 4 is a block diagram showing the configuration of the ONU 200 according to the second embodiment.
  • the interface module 240 includes a main signal IF unit 241, a first serial IF unit 242, and a power feeding IF unit 244, but does not include a second serial IF unit.
  • the ONU 200 includes other switch circuits 270a and 270b instead of the switch circuits 170a and 170b.
  • the switch circuits 270a and 270b are connected by switching from the first serial IF unit 242 to either the first serial signal terminal 121 of the ONU function unit 120 or the second serial signal terminal 111 of the electrical / optical conversion unit 110. It is controlled so that Each of the switch circuits 270a and 270b has three contacts, and each contact is connected to the first serial IF unit 242, the first serial signal terminal 121, and the second serial signal terminal 111, respectively. Each signal line is connected.
  • the signal line 263a from the first serial IF unit 242 is connected to the contact 271a of the switch circuit 270a, the signal line 260a from the first serial signal terminal 121 is connected to the contact 272a, and further to the contact 273a.
  • a signal line 261a from the second serial signal terminal 111 is connected.
  • the signal line 263b from the first serial IF unit 242 is connected to the contact point 271b of the switch circuit 270b
  • the signal line 260b from the first serial signal terminal 121 is connected to the contact point 272b, and the contact point 273b. Is connected to the signal line 261b from the second serial signal terminal 111.
  • the signal lines 263a, 263b, 260a, 260b, 261a, 261b connected to the first serial IF unit 242 directly or via the switch circuits 270a, 270b are all configured by I2C.
  • the switch circuits 270a and 270b branch and connect the ground line 262b to input a control signal, and the switching control of the switch circuits 270a and 270b is performed using the voltage applied to the ground line 262b as a control signal. Is done.
  • the switch circuits 270a and 270b connect the contacts 271a and 273a and the contacts 271b and 273b, respectively. That is, during normal operation connected to the external node 70, the first serial IF unit 242 is connected to the second serial signal terminal 111 of the electrical / optical conversion unit 110.
  • the ONU 200 when the ONU 200 is connected to a test device 180 used at the time of manufacture or maintenance, a predetermined voltage is applied from the applied voltage unit 181 of the test device 180 to the ground line 262b. Is applied.
  • the switch circuits 270a and 270b are switched to connect the contacts 271a and 272a and the contacts 271b and 272b, respectively, when a predetermined voltage is applied to the ground line 262b.
  • the first serial signal terminal 121 and the first serial IF unit 242 are connected, and the ONU function unit 120 can be accessed from the serial signal input / output unit 182 of the test equipment.
  • the first serial IF unit 242 is switched and connected to either the first serial signal terminal 121 of the ONU function unit 120 or the second serial signal terminal 111 of the electrical / optical conversion unit 110.
  • the ONU function unit 120 is accessed via the first serial IF unit 242 only when connected to the test equipment 180 used during manufacturing or maintenance. It is possible. Thereby, it becomes possible to read out and set the operation information of the ONU 200 at the time of manufacturing and maintenance, and the work such as maintenance can be made much more efficient.
  • the switch circuits 270a and 270b When connected to the external node 70, the switch circuits 270a and 270b are switched to connect the first serial IF unit 242 to the second serial signal terminal 111 of the electrical / optical conversion unit 110. Therefore, security is enhanced by preventing access to the ONU function unit 120.
  • FIG. 5 is a block diagram showing a configuration of the ONU 300 according to the third embodiment.
  • the interface module 340 is configured to include a main signal IF unit 341, a first serial IF unit 342, and a power feeding IF unit 344.
  • the switch circuit is not used.
  • the ONU function unit 120 and the electrical / optical conversion unit 110 are connected in parallel to the I2C buses 363 a and 363 b, and the first serial signal terminal 121 of the ONU function unit 120 is connected from the first serial IF unit 342.
  • the second serial signal terminal 111 of the electrical / optical converter 110 is always connected via the I2C buses 363a and 363b.
  • the ONU function unit 120 is connected to the first serial IF unit 342 from the first serial signal terminal 121 via the I2C buses 363a and 363b, and branches and inputs a control signal from the ground line 362b. Yes.
  • the ONU function unit 120 includes a connection line switching unit, uses the voltage applied to the ground line 362b as a control signal, and determines whether the predetermined voltage is applied to the ground line 362b. It is determined whether or not access from one serial IF unit 342 is permitted.
  • the ONU function unit 120 When the ONU 300 is connected to the MSA interface slot of the external node 70 and is normally operated, the ground line 262b is grounded via the external node 70. In this case, since a predetermined voltage is not applied to the ground line 362b, the ONU function unit 120 does not permit access from the first serial IF unit 342. On the other hand, when the ONU 300 is connected to a test device used during manufacturing or maintenance, a predetermined voltage is applied from the test device to the ground line 362b. When the ONU function unit 120 detects that a predetermined voltage is applied to the ground line 362b, the ONU function unit 120 permits access from the first serial IF unit 342.
  • the ONU 300 is configured such that the ONU function unit 120 can be accessed via the first serial IF unit 342 only when connected to a test device used during manufacturing or maintenance. Sometimes, it becomes possible to read and set the operation information of the ONU 300, and the work such as maintenance can be made much more efficient.
  • the ONU function unit 120 detects this, whereby the first serial IF Access to the ONU function unit 120 from the unit 342 may not be permitted. This prevents the ONU function unit from being accessed illegally and enhances security.
  • the electrical / optical conversion unit 110 connected to the I2C buses 363a and 363b can always transmit signals between the second serial signal terminal 111 and the first serial IF unit 342.
  • the description in the present embodiment shows an example of the subscriber premises optical line termination device according to the present invention, and the present invention is not limited to this.
  • the detailed configuration and detailed operation of the subscriber premises optical line terminating device in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)
PCT/JP2008/054346 2007-12-26 2008-03-11 加入者宅側光回線終端装置 WO2009081597A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880000869.9A CN101584156B (zh) 2007-12-26 2008-03-11 用户住宅侧光线路终端装置
HK10102918.3A HK1134870A1 (en) 2007-12-26 2010-03-19 Subsctriber premises optical network unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-333597 2007-12-26
JP2007333597A JP4369972B2 (ja) 2007-12-26 2007-12-26 加入者宅側光回線終端装置

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US9301845B2 (en) 2005-06-15 2016-04-05 P Tech, Llc Implant for knee replacement
JP5144735B2 (ja) * 2010-10-08 2013-02-13 古河電気工業株式会社 加入者宅側光回線終端装置

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WO2007125810A1 (ja) * 2006-04-28 2007-11-08 The Furukawa Electric Co., Ltd. 加入者宅側光回線終端装置及び光伝送システム

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WO2007125810A1 (ja) * 2006-04-28 2007-11-08 The Furukawa Electric Co., Ltd. 加入者宅側光回線終端装置及び光伝送システム

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JP4369972B2 (ja) 2009-11-25
CN101584156B (zh) 2013-01-16
CN101584156A (zh) 2009-11-18
HK1134870A1 (en) 2010-05-14
JP2009159199A (ja) 2009-07-16

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