WO2013094594A1 - 帯域割当装置及び帯域割当方法 - Google Patents
帯域割当装置及び帯域割当方法 Download PDFInfo
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- WO2013094594A1 WO2013094594A1 PCT/JP2012/082772 JP2012082772W WO2013094594A1 WO 2013094594 A1 WO2013094594 A1 WO 2013094594A1 JP 2012082772 W JP2012082772 W JP 2012082772W WO 2013094594 A1 WO2013094594 A1 WO 2013094594A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
- H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
- H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
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- H—ELECTRICITY
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- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
- H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
- H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
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- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Definitions
- the present invention relates to a bandwidth allocation device and a bandwidth allocation method for detecting a subscriber device newly connected to an optical communication system.
- the PON is an optical communication system that achieves economy by sharing one center apparatus and a part of a transmission path with a plurality of users by using an optical multiplexer / demultiplexer using an optical passive element.
- Gigabit Ethernet registered trademark
- Passive Optical Network GE-PON
- TDM time-division multiplexing
- FTTH Fiber To The Home
- wavelength variability is added to the transmitter / receiver so that the transmitter / receiver in the station side device can be added in stages according to the bandwidth requirement, and time division multiplexing (TDM) and wavelength are added.
- TDM time division multiplexing
- WDM Wavelength-variable WDM / TDM-PON that effectively combines multiplexing
- Patent Document 1 and Non-Patent Document 1 have been reported (see, for example, Patent Document 1 and Non-Patent Document 1).
- Patent Document 1 and Non-Patent Document 1 the demand for economic growth remains severe.
- a possible countermeasure is to make it possible to accommodate more users than the existing one for a station-side device.
- it is possible to expect economic effects such as an improvement in network utilization efficiency due to the statistical multiplexing effect and a reduction in device cost and power consumption due to relatively less station side device operation.
- the present invention designates a transmission wavelength by layer 2 control for a connected subscriber apparatus, thereby establishing communication without fail while having an economical apparatus configuration.
- the bandwidth allocating device includes a station-side device having one or a plurality of station-side optical transceivers, each of which includes an optical transmitter that transmits a downlink signal and an optical receiver that receives an uplink signal.
- a subscriber apparatus having one or a plurality of subscriber optical transceivers, each of which includes an optical transmitter that transmits the wavelength of the upstream signal as variable and an optical receiver that receives the downstream signal; and
- the number of subscriber connection terminals to be connected is equal to or greater than the number of subscriber devices, and the bandwidth allocation device of the PON system includes an optical transmission line that connects the station side device and the subscriber device, A station-side control unit that causes each of the station-side optical transceivers to transmit a search signal at a predetermined time so as to reach all the subscriber connection ends of the optical transmission line, and the subscriber connection of the optical transmission line
- the subscriber device connected to the end is unregistered If, upon receiving the search signal, the optical transmitter of the subscriber unit is set to a wavelength corresponding to the search signal, and a subscriber control unit for transmitting a response signal to the station side device.
- the number of subscriber connection ends is equal to or greater than the number of subscriber devices, and a bandwidth allocation method for a PON system including an optical transmission line that connects the station side device and the subscriber device, A search signal transmission procedure for transmitting a search signal at a predetermined time so as to reach all the subscriber connection ends of the optical transmission line from each of the station side optical transceivers, and the subscriber connection of the optical transmission line
- the optical transmitter of the subscriber device is set to a wavelength corresponding to the search signal, to the station side device And a response signal transmission procedure for transmitting the response signal.
- This bandwidth allocation device and bandwidth allocation method can detect a newly connected subscriber device and specify a signal wavelength by periodically transmitting a search signal for all wavelengths that may be used. Realized with simple functions. Accordingly, it is possible to provide a bandwidth allocation device and a bandwidth allocation method that can specify a transmission wavelength by a simple means when a subscriber device is newly connected to the optical communication system, and can make the subscriber device more economical.
- the station-side control unit of the bandwidth allocating device includes wavelength information of a wavelength to be set in an optical transmitter of the unregistered subscriber device in the search signal, and the subscriber control unit includes the search signal
- the wavelength of the optical transmitter of the subscriber unit can be determined based on the wavelength information included in the subscriber unit.
- the bandwidth allocation method includes, in the search signal transmission procedure, wavelength information of a wavelength to be set in an optical transmitter of the unregistered subscriber device in the search signal, and in the response signal transmission procedure, The wavelength of the optical transmitter of the subscriber unit is determined based on the wavelength information included in the search signal.
- the station-side control unit of the band allocation device includes wavelength information on the wavelength of the search signal and identification information for identifying an optical transmitter of the station-side device that transmits the search signal in the search signal.
- the subscriber control unit has a correspondence table between the wavelength information and the wavelength set in the optical transmitter of the subscriber device with respect to the identification information, and the wavelength information and the identification information included in the search signal. The wavelength of the optical transmitter of the subscriber unit can be determined based on
- wavelength information of the wavelength of the search signal and identification information for identifying an optical transmitter of the station side device that transmits the search signal are searched for.
- the response signal transmission procedure includes a correspondence table of the wavelength information and the wavelength set in the optical transmitter of the subscriber unit with respect to the identification information, and the wavelength information included in the search signal The wavelength of the optical transmitter of the subscriber unit is determined based on the identification information.
- the subscriber unit of the band allocating device includes a set of an optical transmitter that transmits a wavelength of the uplink signal that can be changed and an optical receiver that receives a desired downlink signal that can change the reception wavelength.
- One or more subscriber optical transceivers, and the station-side control unit includes wavelength information of wavelengths to be set in the optical transmitter of the unregistered subscriber device in the search signal, and the subscriber The control unit periodically changes a wavelength receivable by the transmitter / receiver of the subscriber device, and when there is the search signal having a receivable wavelength, causes the transmitter / receiver of the subscriber device to receive the search signal,
- the wavelength of the optical transmitter of the subscriber unit can be determined based on the included wavelength information.
- the bandwidth allocation method includes an optical transmitter that transmits the wavelength of the uplink signal as changeable and an optical receiver that receives the desired downlink signal as changeable reception wavelength. It has one or more subscriber optical transceivers as a set, and in the search signal transmission procedure, wavelength information of wavelengths set in the optical transmitter of the unregistered subscriber device is included in the search signal, In the response signal transmission procedure, the wavelength receivable by the transmitter / receiver of the subscriber unit is periodically changed, and when there is the search signal having a receivable wavelength, the signal is received by the transmitter / receiver of the subscriber unit, The wavelength of the optical transmitter of the subscriber unit is determined based on the wavelength information included in the search signal.
- the station-side control unit of the bandwidth allocating device causes one or a plurality of the station-side optical transceivers to transmit the search signal.
- the band allocation method according to the present invention is characterized in that, in the search signal transmission procedure, one or a plurality of the station-side optical transceivers transmit the search signal.
- the wavelength information included in the search signal includes a plurality of wavelengths
- the subscriber control unit selects one of a plurality of wavelengths of the wavelength information selected at random from the subscription
- the wavelength of the optical transmitter of the user device is determined.
- the wavelength information included in the search signal includes a plurality of wavelengths, and the response signal transmission procedure selects one randomly selected from the plurality of wavelengths of the wavelength information.
- the wavelength of the optical transmitter of the subscriber unit is determined.
- the station-side control unit of the bandwidth allocating device includes a reception wavelength of the station-side optical transceiver that is to receive the response signal of the subscriber device as the wavelength information in the search signal. To do.
- the bandwidth allocation method includes, in the search signal transmission procedure, the reception wavelength of the optical transceiver on the station side that is to receive the response signal of the subscriber unit as the wavelength information in the search signal. It is characterized by.
- the wavelength information included in the search signal of the band allocating device according to the present invention is a plurality of wavelengths that are weighted for selection, and the subscriber control unit uses the weighting among the plurality of wavelengths of the wavelength information. One selected according to this is determined as the wavelength of the optical transmitter of the subscriber unit.
- the wavelength information included in the search signal is a plurality of wavelengths weighted for selection, and in the response signal transmission procedure, among the plurality of wavelengths of the wavelength information, One selected according to the weight is determined as the wavelength of the optical transmitter of the subscriber unit.
- the present invention provides a bandwidth allocating device and a bandwidth allocating method that can specify a transmission wavelength by a simple means when a subscriber device is newly connected to an optical communication system, and can make the subscriber device more economical. it can.
- the band allocation device In the band allocation device according to the present invention, it is a diagram showing the relationship between the search signal, the input / output port of the wavelength filter 30, and the wavelength. In the band allocation device according to the present invention, it is a diagram showing the relationship between the search signal number and the wavelength information included therein. It is a figure which shows the relationship between the information contained in a search signal, and the information calculated in a subscriber apparatus in the band allocation apparatus which concerns on this invention.
- FIG. 4 is a diagram illustrating a relationship between a search signal, an input / output port of a wavelength filter 30, and wavelengths in the band allocation device according to the present invention. In the band allocation device according to the present invention, it is a diagram showing the relationship between the search signal number and the wavelength information included therein.
- FIG. 2 shows the configuration of the optical communication system 301 of the present embodiment.
- the optical communication system 301 includes a subscriber device 10 as a plurality of user devices, a station-side device 20 as a center device, a wavelength filter 30 having a revolving property, an optical power splitter 40, a station-side device 20, and a wavelength filter. 30, a plurality of optical fibers 50 that connect the wavelength filter 30 and the optical power splitter 40 in a single core, and a plurality that connect the optical power splitter 40 and the subscriber unit 10 in a single core. It is composed of a single optical fiber 70. In some cases, only one subscriber unit is directly connected to the subscriber side port of the wavelength filter 30 without going through the optical power splitter 40.
- the optical communication system 301 is a PON system that effectively combines time division multiplexing and wavelength division multiplexing.
- the optical transmission line 101 is a section from the station side device 20 to the subscriber device 10.
- An optical signal transmitted from the station apparatus 20 to the subscriber apparatus 10 via the optical transmission path 101 is a downlink signal
- an optical signal transmitted from the subscriber apparatus 10 to the station apparatus 20 via the optical transmission path 101 is an uplink signal.
- the end of the optical fiber 70 connected to the optical transmission path 101 by the subscriber apparatus 10 may be referred to as a subscriber connection end
- each optical transceiver 21 of the station side apparatus 20 connects to the optical transmission path 101.
- the end of 50 may be referred to as a station side connection end.
- the optical communication system 301 includes a bandwidth allocation device that allocates a transmission wavelength when a subscriber device 10 is newly connected to the optical transmission line 101.
- the band allocation device includes a station side control unit 90 and a subscriber control unit 80.
- the station side device 20 includes one or a plurality of optical transceivers 21 and a station side control unit 90.
- the optical transceiver 21 includes an optical transmitter 23 that transmits a downstream signal, an optical receiver 24 that receives an upstream signal, and a wavelength multiplexer / demultiplexer 22 that includes a wavelength filter that multiplexes and demultiplexes the downstream optical signal and the upstream optical signal. Is provided.
- the output wavelength of the optical transmitter 23-i in the optical transceiver 21-i (1 ⁇ i ⁇ m, i and m are natural numbers) is ⁇ di.
- the optical transmitter 23 can change the output wavelength from ⁇ d1 to ⁇ dn.
- the optical transceiver 21-i may also be expressed as “Line Card (LC)” or “OLT Port”.
- the subscriber device 10 includes an optical transmitter 11 that transmits an upstream signal, an optical receiver 12 that receives a downstream signal, and a wavelength multiplexer / demultiplexer 13 that includes a wavelength filter that multiplexes and demultiplexes the upstream optical signal and the downstream optical signal. And a subscriber control unit 80.
- the optical transmitter 11 can change the output wavelength from ⁇ u1 to ⁇ um.
- FIG. 3 is an example of the wavelength arrangement of the downstream signal and upstream signal.
- the wavelength band of the upstream signal is arranged on the shorter wavelength side than the wavelength band of the downstream signal, but the wavelength band of the downstream signal is arranged on the shorter wavelength side than the wavelength band of the upstream signal
- the wavelength bands of the upstream and downstream signals may overlap.
- the wavelength filter 30 has station side ports A1 to Am and subscriber side ports B1 to Bn (m and n are integers, n ⁇ m).
- FIG. 4 is a diagram illustrating the input / output ports of the wavelength filter 30. The relationship between the input / output ports of the wavelength filter 30 and the input / output wavelengths is circular as shown in FIG.
- the subscriber devices 10 or groups of subscriber devices 10 connected to the subscriber side ports B1 to Bn of the wavelength filter 30 are referred to as PON-1 to PON-n for convenience.
- the flow of downstream signals in the optical communication system 301 will be described.
- the flow of a downlink signal from the optical transceiver 21-i in the station side device 20 to the subscriber device 10-j will be described.
- the downstream signal is input to the station side port Ai of the wavelength filter 30 through the wavelength multiplexer / demultiplexer 22-i and the optical fiber 50-i.
- the downlink signal input to Ai is output to the subscriber side port Bj (1 ⁇ j ⁇ n, j is an integer) according to the wavelength / port correspondence table shown in FIG.
- the downstream signal output from Bj reaches the optical power splitter 40-j through the optical fiber 60-j.
- the flow of uplink signals in the optical communication system 301 will be described.
- the flow of the upstream signal from the subscriber unit 10-j (1 ⁇ j ⁇ n, j is an integer) to the intra-station optical transceiver 21-i (1 ⁇ i ⁇ m, i is an integer) is described. To do.
- the signal is input to the subscriber side port Bj of the wavelength filter 30 through the wave filter 13-j, the optical fiber 70-j, the optical power splitter 40-j, and the optical fiber 60-j.
- the uplink signal input to Bj is passively output to the station side port Ai (1 ⁇ i ⁇ m, i is an integer) according to the wavelength / port correspondence table shown in FIG.
- the upstream signal output from Ai passes through the optical fiber 50-i, reaches the optical receiver 24-i through the wavelength multiplexer / demultiplexer 22-i in the optical transceiver 21-i in the station side device 20. To do.
- the station-side control unit 90 causes each optical transceiver 21 to transmit a search signal (Discovery Gate) at a predetermined time so as to reach all the subscriber connection ends of the optical transmission path 101.
- a search signal Discovery Gate
- the subscriber control unit 80 searches for the optical transmitter 11 of the subscriber device 10 when receiving the search signal.
- the wavelength corresponding to the signal is set, and a response signal (Registration Request) is transmitted to the station side device 20.
- the predetermined time when the search signal is transmitted may be periodic or may be when a new subscriber device 10 is connected.
- the station-side control unit 90 includes wavelength information of the wavelength set in the optical transmitter 11 of the unregistered subscriber device 10 in the search signal, and the subscriber control unit 80 subscribes based on the wavelength information included in the search signal. The wavelength of the optical transmitter 11 of the person device 10 is determined.
- the optical transceiver 21-1 of the station side device 20 transmits a search signal for detecting the unregistered subscriber device 10 periodically or when necessary.
- the optical transmitter / receiver 21-1 searches for the search signals S1-1 ⁇ 1 according to the correspondence table shown in FIG. 8 held in the station side control unit 90 so that the search signals are distributed to all the subscriber ports B1 ⁇ Bn of the wavelength filter 30. Send S1-n. That is, the station-side control unit 90 causes the station-side optical transceiver 21 to transmit a search signal so that the search signal reaches all subscriber connection ends of the optical transmission path 101.
- the wavelength filter 30 has a recursive property.
- the wavelength to be output differs depending on whether it is connected to (which subscriber connection end of the optical transmission line 101 is connected).
- the station-side control unit 90 specifies the wavelength for each destination PON (1 to n) to be used when the unregistered subscriber device 10 responds to the search signal. Information to be included in the search signal.
- the unregistered subscriber device 10 that has received the search signal transmits a response signal to the station-side device 20 by matching the output wavelength to the wavelength specified by the information included in the search signal.
- the unregistered subscriber device 10 sets the wavelength of the response signal to ⁇ u1.
- the transmitted response signal is output to the station side port A1 by the wavelength filter 30 and reaches the optical transceiver 21-1 via the optical fiber 50-1.
- the response signal is output in the direction of the optical receiver 24-1 by the wavelength multiplexer / demultiplexer 22-1 and received by the optical receiver 24-1. Therefore, the station side device 20 can detect that the unregistered subscriber device 10 is connected, and can register it. For example, the station-side device 20 notifies the subscriber device 10 of the completion of registration using a Register signal including an LLID (Logical Link. ID).
- LLID Logical Link. ID
- the optical communication system 301 can realize the detection of the newly added subscriber device and the registration to the station side device without fail.
- the optical transmitter / receiver 21-1 transmits a search signal and the optical transmitter / receiver 21-1 receives a response signal to the search signal has been described, but other optical transmitter / receiver 21-i ( The same applies to the case of 1 ⁇ i ⁇ m, where i is an integer. That is, the optical communication system 301 includes the rows in the correspondence tables of FIGS. 8 and 9 corresponding to the port Ai of the wavelength filter 30 to which the optical transceiver 21-i is connected (station side connection end of the optical transmission path 101). A similar operation can be performed by referring to it.
- the optical transceiver 21 that transmits the search signal is different from the optical transceiver 21 that receives the response signal. That is, in the optical communication system 301, according to the ports (A1 to Am) of the wavelength filter 30 to which the respective optical transceivers 21 are connected (station side connection ends of the optical transmission path 101), FIG. The same operation can be performed by referring to the corresponding line.
- ⁇ Embodiment 2> (Include own wavelength information and port information in search signal)
- the configuration of this embodiment is the same as that of the optical communication system 301 in FIG.
- the upstream and downstream signal flows of the station side device 20 and the subscriber device 10 are the same as those of the optical communication system 301.
- Embodiments in which the station-side control unit 90 transmits a search signal at a predetermined time and the subscriber control unit 80 sets the optical transmitter 11 to a wavelength corresponding to the search signal and transmits a response signal to the station-side device 20 are embodiments. This is the same as the description of 1.
- This embodiment employs the second of the two means for setting the optical transmitter 11 of the subscriber unit 10 to the wavelength corresponding to the search signal.
- the station-side control unit 90 includes wavelength information of the wavelength of the search signal and identification information for identifying the optical transmitter 21 of the station-side device 20 that transmits the search signal in the search signal, and the subscriber control unit 80 And the wavelength set in the optical transmitter 11 of the subscriber device 10 with respect to the identification information, and the wavelength of the optical transmitter 11 of the subscriber device 10 is determined based on the wavelength information and the identification information included in the search signal. decide.
- search signals S1-1 to S1-n
- the subscriber device 10 determines the wavelength of the response signal to the optical transceiver 21-1 in consideration of the circulation of the wavelength filter 30.
- the search signal includes “information on the wavelength of the search signal itself” and information on the station side port “A1” of the wavelength filter 30 to which the optical transceiver 21-1 is connected.
- the information on the station side port “A1” is also information on the station side connection end of the optical transmission line 101 to which the optical transceiver 21-1 is connected.
- the unregistered subscriber device 10 that has received the search signal belongs to the own device as shown in FIG. 10 from the information included in the search signal and the correspondence table of FIG. 8 held by the subscriber control unit 80-1.
- the PON number (1 to n) and the wavelength for sending a signal to the optical transceiver 21-1 are calculated.
- the unregistered subscriber device 10 sets the output wavelength of the optical transmitter 11-1 to the calculated wavelength, and transmits a response signal to the station side device 20.
- the unregistered subscriber device 10 sets the wavelength of the response signal to ⁇ u1.
- the optical communication system 301 can realize the detection of the newly added subscriber device and the registration to the station side device without fail.
- the optical communication system 301 corresponds to that shown in FIG. 8 and FIG. 10 according to the circularity of the wavelength filter 30 and the ports (A1 to Am) or the station side connection ends to which the respective optical transceivers 21 are connected. The same operation can be performed by rewriting the line.
- FIG. 5 shows a configuration of the optical communication system 302 according to the third embodiment.
- the optical communication system 302 includes a subscriber device 10 as a plurality of user devices, a station-side device 20 as a center device, an optical power splitter 31, a wavelength filter 30 ′, an optical power splitter 31, and a wavelength filter 30 ′.
- optical fibers 70 that connect the optical power splitter 40 and the subscriber device 10 with a single core. There may be a case where only one subscriber unit is connected at the subscriber side port of the wavelength filter 30 ′ without going through the optical power splitter 40.
- the optical communication system 302 is a PON system that effectively combines time division multiplexing and wavelength division multiplexing.
- the optical transmission line 102 is a section from the station side device 20 to the subscriber device 10.
- the configuration of the subscriber device 10 is the same as the configuration of the subscriber device 10 described in FIG.
- the wavelength arrangement of the downstream signal and upstream signal of the optical communication system 302 is the same as that of the example of the optical communication system 301 in FIG.
- the wavelength filter 30 ' has a station side port A1 and subscriber side ports B1 to Bn (n is a natural number).
- FIG. 6 is a diagram illustrating the input / output ports of the wavelength filter 30 '.
- FIG. 11 is a diagram for explaining the relationship between the input / output ports of the wavelength filter 30 ′ and the input / output wavelengths.
- subscriber devices 10 or groups of subscriber devices 10 connected to the subscriber side ports B1 to Bn of the wavelength filter 30 ' are referred to as PON-1 to PON-n, respectively.
- the wavelength ⁇ p (1 ⁇ p ⁇ n, p is an integer) transmitted from the optical transmitter 23-i in the optical transceiver 21-i (1 ⁇ i ⁇ m, i is an integer) in the station-side device 20
- the downstream signal is input to the station side port A1 of the wavelength filter 30 ′ via the wavelength multiplexer / demultiplexer 22-i, the optical fiber 50-i, the optical power splitter 31, and the optical fiber 32.
- the downlink signal input to A1 is output to the subscriber side port Bj (1 ⁇ j ⁇ n, j is an integer) according to the wavelength and port correspondence table shown in FIG.
- the downstream signal output from Bj reaches the optical power splitter 40-j through the optical fiber 60-j.
- the downstream signal is distributed and reaches all the subscriber apparatuses belonging to the downstream side of the optical power splitter, that is, PON-j equally.
- the downstream signal is input to the subscriber unit 10-j through the optical fiber 70-j, and reaches the optical receiver 12-j through the wavelength multiplexer / demultiplexer 13-j in the subscriber unit.
- Embodiments in which the station-side control unit 90 transmits a search signal at a predetermined time and the subscriber control unit 80 sets the optical transmitter 11 to a wavelength corresponding to the search signal and transmits a response signal to the station-side device 20 are embodiments. This is the same as the description of 1.
- the station-side control unit 90 includes wavelength information of the wavelength set in the optical transmitter 11 of the unregistered subscriber device 10 in the search signal, and the subscriber control unit 80 subscribes based on the wavelength information included in the search signal. The wavelength of the optical transmitter 11 of the person device 10 is determined.
- the transceiver 21-1 searches for the search signal S1-1 according to the correspondence table shown in FIG. 12 held in the station-side control unit 90 so that the search signal is distributed to all the subscriber ports B1 to Bn of the wavelength filter 30 ′. Send ⁇ S1-n. That is, the station-side control unit 90 causes the station-side optical transceiver 21 to transmit a search signal so that the search signal reaches all subscriber connection ends of the optical transmission path 102.
- the unregistered subscriber device 10 that has received the search signal transmits a response signal to the station-side device 20 by matching the output wavelength to the wavelength specified by the information included in the search signal.
- the unregistered subscriber device 10 sets the wavelength of the response signal to ⁇ u1.
- the station-side control unit 90 controls the wavelength variable filter 25-1 to set the transmission wavelength so that the response signal having the wavelength ⁇ 1 can be received.
- the transmitted response signal is output to the station side port A1 by the wavelength filter 30 ′ and reaches all the optical transceivers 21 via all the optical fibers 50.
- the response signal is output by the wavelength multiplexer / demultiplexer 22 toward the optical receiver 24.
- the transmission wavelength of the wavelength tunable filter (25-2 to 25-m) is different from the wavelength of the response signal, the response signal is blocked by the wavelength tunable filter (25-2 to 25-m).
- the response signal can be transmitted only through the wavelength tunable filter 25-1, and is received by the optical receiver 24-1. Therefore, the station side device 20 can detect that the unregistered subscriber device 10 is connected, and can register it.
- the optical communication system 302 can realize the detection of the newly added subscriber device and the registration to the station side device without fail.
- optical transmitter / receiver 21-1 transmits a search signal and the optical transmitter / receiver 21-1 receives a response signal to the search signal has been described, but other optical transmitter / receiver 21-i (The same applies to the case of 1 ⁇ i ⁇ m, where i is an integer. That is, in the optical communication system 302, since the port to which any of the optical transceivers 21-i is connected is A1, the same operation is possible by referring to the rows of the correspondence tables in FIGS.
- Embodiments in which the station-side control unit 90 transmits a search signal at a predetermined time and the subscriber control unit 80 sets the optical transmitter 11 to a wavelength corresponding to the search signal and transmits a response signal to the station-side device 20 are embodiments. This is the same as the description of 1.
- This embodiment employs the second of the two means for setting the optical transmitter 11 of the subscriber unit 10 to the wavelength corresponding to the search signal.
- the station-side control unit 90 includes wavelength information of the wavelength of the search signal and identification information for identifying the optical transmitter 21 of the station-side device 20 that transmits the search signal in the search signal, and the subscriber control unit 80 And the wavelength set in the optical transmitter 11 of the subscriber device 10 with respect to the identification information, and the wavelength of the optical transmitter 11 of the subscriber device 10 is determined based on the wavelength information and the identification information included in the search signal. decide.
- search signals S1-1 to S1-n
- the subscriber device 10 determines the wavelength of the response signal to the optical transceiver 21-1 in consideration of the subscriber side port of the wavelength filter 30 '.
- the search signal includes information on “the wavelength of the search signal itself” and information on the station side port “A1” of the wavelength filter 30 ′ to which the optical transceiver 21-1 is connected. It is. In the optical communication system 302, even if the station side connection ends are different, the station side port is “A1” and is the same. Therefore, the search signal may not include the station side port information.
- the unregistered subscriber device 10 that has received the search signal belongs to the own device as shown in FIG. 13 from the information included in the search signal and the correspondence table of FIG. 11 held by the subscriber control unit 80-1.
- the PON number (1 to n) and the wavelength for sending a signal to the station side device 20 are calculated.
- the unregistered subscriber device 10 sets the output wavelength of the optical transmitter 11-1 to the calculated wavelength, and transmits a response signal to the station-side device 20.
- the unregistered subscriber device 10 sets the wavelength of the response signal to ⁇ u1.
- the station-side control unit 90 controls the wavelength tunable filter 25-1 to set the transmission wavelength so that the response signal having the wavelength ⁇ 1 can be received.
- the transmitted response signal can be transmitted only through the wavelength tunable filter 25-1, as described in the third embodiment, and is received by the optical receiver 24-1. Therefore, the station side device 20 can detect that the unregistered subscriber device 10 is connected, and can register it.
- the optical communication system 302 can realize the detection of the newly added subscriber device and the registration to the station side device without fail.
- the optical transceiver 21-1 transmits a search signal and the optical transceiver 21-1 receives a response signal to the search signal has been described.
- FIG. 7 shows the configuration of the optical communication system 303 of the fifth embodiment.
- the optical communication system 303 includes a plurality of subscriber devices 10 as user devices, a station-side device 20 as a center device, an optical power splitter 30 ′′, and a plurality of devices that connect the station-side device 20 and the optical power splitter 30 ′′.
- Optical fiber 50, optical power splitter 40, optical power splitter 30 ′′, optical power splitter 40, optical fiber splitter 60, optical power splitter 40, optical power splitter 40, and subscriber device 10 are connected in a single core.
- the optical communication system 303 is a PON system that effectively combines time division multiplexing and wavelength division multiplexing.
- the optical transmission path 103 is a section from the station side apparatus 20 to the subscriber apparatus 10.
- the optical communication system 303 includes a bandwidth allocation device that assigns a transmission wavelength when a subscriber device 10 is newly connected to the optical transmission line 103.
- the band allocation device includes a station side control unit 90 and a subscriber control unit 80.
- the station side device 20 includes one or a plurality of optical transceivers 21 and a station side control unit 90.
- the optical transceiver 21 has the same configuration as that of the optical transceiver 21 described in FIG.
- the subscriber device 10 further includes a wavelength tunable filter 14 for selecting the wavelength of the downlink signal received by the subscriber device 10 in FIG.
- the wavelength tunable filter 14 can change the transmission wavelength from ⁇ d1 to ⁇ dm.
- the wavelength arrangement of the downstream signal and upstream signal of the optical communication system 303 is the same as that of the example of the optical communication system 301 in FIG.
- the flow of downstream signals in the optical communication system 303 will be described.
- the flow of a downlink signal from the optical transceiver 21-i in the station side device 20 to the subscriber device 10-j will be described.
- the downstream signal of wavelength ⁇ i transmitted from the optical transmitter 23-i in the optical transceiver 21-i in the station side device 20 passes through the wavelength multiplexer / demultiplexer 22-i and the optical fiber 50-i, and the optical power It reaches the splitter 30 ′′.
- the downstream signal is equally distributed to the optical fibers 60-1 to 60-n.
- the downstream signal distributed to the optical fiber 60-j (1 ⁇ j ⁇ n) reaches the optical power splitter 40-j.
- the downstream signal is equally distributed to the plurality of optical fibers 70.
- the downlink signal distributed to the optical fiber 70-j reaches the wavelength tunable filter 14-j via the wavelength multiplexer / demultiplexer 13-j in the subscriber unit 10-j.
- the transmission wavelength of the wavelength tunable filter 14-j is set to ⁇ di
- the downstream signal passes through the wavelength tunable filter 14-j and reaches the optical receiver 12-j.
- the flow of uplink signals in the optical communication system 303 will be described.
- the flow of the upstream signal from the subscriber unit 10-j (1 ⁇ j ⁇ n, j is an integer) to the intra-station optical transceiver 21-i (1 ⁇ i ⁇ m, i is an integer) is described. To do.
- Uplink signals of wavelength ⁇ q (1 ⁇ q ⁇ m, q is a natural number) transmitted from the optical transmitter 11-j in the subscriber unit 10-j are the wavelength multiplexer / demultiplexer 13-j and the optical fiber 70-j. And reaches the optical power splitter 30 ′′ via the optical power splitter 40-j.
- the upstream signal is equally distributed to the plurality of optical fibers 50-1 to 50-m.
- the upstream signal distributed to the optical fiber 50-i passes through the wavelength multiplexer / demultiplexer 22-i and the wavelength tunable filter 25-i in the intra-station optical transceiver 21-i, and passes through the optical receiver 24. -I is reached.
- Embodiments in which the station-side control unit 90 transmits a search signal at a predetermined time and the subscriber control unit 80 sets the optical transmitter 11 to a wavelength corresponding to the search signal and transmits a response signal to the station-side device 20 are embodiments. This is the same as the description of 1.
- the means for setting the optical transmitter 11 of the subscriber unit 10 to the wavelength corresponding to the search signal is as follows.
- the station-side control unit 90 includes wavelength information of the wavelength set in the optical transmitter 11 of the unregistered subscriber device 10 in the search signal, and the subscriber control unit 80 subscribes based on the wavelength information included in the search signal.
- the wavelength of the optical transmitter 11 of the person device 10 is determined.
- the subscriber control unit 80 periodically changes the wavelength receivable by the transmitter / receiver 12 of the subscriber device 10 and receives the search signal of the receivable wavelength by the transmitter / receiver 12 of the subscriber device 10. It is preferable that the wavelength of the optical transmitter 11 of the subscriber device 10 is determined based on the wavelength information included in the search signal.
- the station-side control unit 90 causes one station-side optical transceiver 21 to transmit a search signal. Therefore, a search signal for detecting the unregistered subscriber device 10 is transmitted from the optical transceiver 21-1 of the station side device 20 periodically or when necessary.
- the wavelength to be output differs depending on whether or not
- the station-side control unit 90 includes information specifying a wavelength to be used when the unregistered subscriber device 10 responds in the search signal. For example, when the response signal is to be received by the intra-station optical transceiver 21-1, the station control unit 90 designates “ ⁇ u1” as the wavelength to be used when the unregistered subscriber apparatus 10 responds. Include information in the search signal.
- the unregistered subscriber device 10 that has received the search signal transmits a response signal to the station-side device 20 by matching the output wavelength to the wavelength specified by the information included in the search signal.
- the wavelength information included in the search signal is not limited to one wavelength.
- the wavelength information may be a plurality of wavelengths.
- the subscriber control unit 80 determines one randomly selected from the plurality of wavelengths of the wavelength information as the wavelength of the optical transmitter 11 of the subscriber device 10. By doing in this way, the communication amount of each station side optical transmitter-receiver 21 can be equalize
- the unregistered subscriber device 10 sets the wavelength of the response signal to ⁇ u1.
- the transmitted response signal passes through the optical power splitter 30 ′′ and reaches all the optical transceivers 21 through all the optical fibers 50.
- the response signal is transmitted to the optical receiver 24 by the wavelength multiplexer / demultiplexer 22.
- the transmission wavelength of the wavelength variable filter (25-2 to 25-m) is different from the wavelength of the response signal, the response signal is blocked by the wavelength variable filter (25-2 to 25-m).
- the response signal can be transmitted only through the wavelength tunable filter 25-1, and is received by the optical receiver 24-1. Therefore, the station side device 20 detects that the unregistered subscriber device 10 is connected. Can be registered.
- the optical communication system 303 can realize the detection of the newly added subscriber device and the registration to the station side device without fail.
- optical transceiver 21-1 transmits a search signal and the optical transceiver 21-1 receives a response signal to the search signal has been described.
- the wavelength of the response signal should be designated as a wavelength corresponding to the optical transceiver 21 that receives the response signal. A similar operation is possible.
- the station-side control unit 90 may include the reception wavelength of the station-side optical transceiver 21 that is to receive the response signal of the subscriber device 10 in the search signal as wavelength information. Depending on the communication status, a deviation in communication amount occurs in each station-side optical transceiver 21. For this reason, the station-side control unit 90 uses the wavelength received by the station-side optical transceiver 21 as wavelength information to search for the new subscriber unit 10 to the station-side optical transceiver 21 that has available capacity. Include in By doing in this way, the deviation of the communication amount of each station side optical transmitter-receiver 21 can be made small.
- the wavelength information included in the search signal is a plurality of wavelengths weighted for selection, and the subscriber control unit 80 selects one of the plurality of wavelengths of the wavelength information according to the weighting from the subscriber device.
- the wavelength of 10 optical transmitters may be determined.
- the station-side control unit 90 connects the new subscriber unit 10 to the station-side optical transceiver 21 that has a free capacity. Therefore, the wavelength received by the station side optical transceiver 21 is weighted and included in the search signal as wavelength information. By doing in this way, the deviation of the communication amount of each station side optical transmitter-receiver 21 can be made small.
- the means for setting the optical transmitter 11 of the subscriber unit 10 to the wavelength corresponding to the search signal is as follows.
- the station-side control unit 90 includes wavelength information of the wavelength set in the optical transmitter 11 of the unregistered subscriber device 10 in the search signal, and the subscriber control unit 80 subscribes based on the wavelength information included in the search signal.
- the wavelength of the optical transmitter 11 of the person device 10 is determined.
- the station-side control unit 90 causes a plurality of station-side optical transceivers 21 (OLT Port 21) to transmit search signals. Therefore, a search signal for detecting the unregistered subscriber device 10 is transmitted periodically or when necessary from a plurality or all of the transceivers 21-1 to 21-m of the station side device 20.
- the transceivers (21-1 to 21-3) transmit search signals will be described.
- All search signals transmitted by the plurality of transceivers (21-1 to 21-3) reach the optical signal input ports (all subscriber connection ends of the optical transmission path 103) of all the subscriber devices 10.
- the transmission wavelength of the wavelength tunable filter 14 in the subscriber apparatus 10 is not necessarily set to a wavelength that transmits any one of the search signals, there is a subscriber apparatus 10 that cannot receive the search signal. sell. For this reason, it is assumed that the unregistered subscriber device 10 periodically changes the transmission wavelength of the wavelength tunable filter 14 between ⁇ d1 to ⁇ dm.
- the station-side control unit 90 includes information specifying a wavelength to be used when the unregistered subscriber device 10 responds in the search signal.
- the wavelength information included in the search signal is not limited to one wavelength.
- the wavelength information may be a plurality of wavelengths. For example, when it is desired to receive response signals from a plurality of subscriber devices 10 evenly distributed to the transmitters / receivers (21-1 to 21-m), the station-side control unit 90 transmits the unregistered subscriber devices 10 to each other. Includes information specifying that “one randomly selected from ⁇ u1,..., ⁇ um” is used as a wavelength to be used when responding. In FIG. 14, it is expressed as “Discovery Gate random ( ⁇ u2 or ⁇ u3)”. When the wavelength information is one wavelength, “Discovery Gate ( ⁇ u2)” is obtained.
- the unregistered subscriber device 10 that has received the search signal randomly selects one wavelength from ⁇ u1 to ⁇ um by the subscriber control unit 80, and adjusts the output wavelength to the wavelength to the station side device 20. Then, a response signal (Registration Request) is transmitted.
- ONU2 the unregistered subscriber device 10 (ONU2) selects ⁇ u3 as the wavelength of the response signal and sets the wavelength of the response signal to ⁇ u3.
- the transmitted response signal passes through the optical power splitter 30 ′′ and reaches all the optical transceivers 21 through all the optical fibers 50.
- the response signal is transmitted to the optical receiver 24 by the wavelength multiplexer / demultiplexer 22.
- the transmission wavelength of the wavelength tunable filter (25-2 to 25-m) is different from the wavelength of the response signal (for example, ⁇ u3)
- the response signal is transmitted to the wavelength tunable filter (25-1 to 25-2). 25-4 to 25-m)
- the response signal can be transmitted only through the tunable filter 25-3 and is received by the optical receiver 24-3. It is possible to detect that the subscriber device 10 is connected and register it, for example, the station side device 20 includes LLID (Logical Link. ID) that the registration to the subscriber device 10 is completed. Reg It is notified by ster signal.
- LLID Logical Link. ID
- the optical communication system 303 detects a newly added subscriber device and registers it in the station side device by transmitting a search signal by the single transmitter / receiver 21 to provide a single transmitter / receiver.
- the response can be completed more quickly than in the case where the response signal is received by 21.
- the optical transceivers (21-1 to 21-3) transmit search signals, and the optical transceivers (21-1 to 21-m) receive response signals for the search signals with an equal probability.
- the station-side control unit 90 can include the reception wavelength of the station-side optical transceiver 21 that is to receive the response signal of the subscriber device 10 as wavelength information in the search signal. Rather than specifying “randomly selected from ⁇ u1,..., ⁇ um” as a command to specify a response signal, select from a set of elements having an arbitrary wavelength from ⁇ u1 to ⁇ um. Can be made. By such means, the transmitter / receiver 21 that receives the response signal is assigned to each element of an arbitrary group (for example, a set of non-congested transmitter / receivers 21 in which there is sufficient vacancy in the upstream signal band). The response signal can be received with the load evenly distributed.
- the wavelength information included in the search signal is a plurality of wavelengths that are weighted for selection, and the subscriber control unit 80 selects one of the plurality of wavelengths of the wavelength information according to the weighting.
- the wavelength of 10 optical transmitters may be determined.
- the command for specifying the response signal is not specified as “one randomly selected from ⁇ u1,..., ⁇ um”, but is determined according to the degree of congestion of each transmitter / receiver 21. Can be biased.
- the transmitter / receiver 21 that receives the response signal has a probability corresponding to the weighting (for example, the probability of the non-congested transmitter / receiver 21 having sufficient free space in the upstream signal band is increased).
- the response signal can be received by distributing the load evenly.
- a one-to-many connection optical communication system composed of one station-side device and a plurality of subscriber devices, wherein the station-side device is an optical transmission / reception composed of an optical transmitter and an optical receiver capable of changing a set of output wavelengths One or a plurality of receivers, and the subscriber unit includes an optical transmitter / receiver composed of a set of optical transmitters and receivers capable of changing a set of output wavelengths, and the station side unit and the subscriber unit include one or a plurality of units.
- the station side device Connected via an optical power splitter or a wavelength filter, a combination in which the transmitter in the station apparatus and the receiver in the subscriber apparatus communicate with each other, and the transmitter in the subscriber apparatus and the receiver in the station side communicate with each other
- the station side device has means for periodically searching for unregistered subscriber devices.
- the station side device periodically and periodically uses a search signal for detecting unregistered subscriber devices in all wavelengths used for downlink communication.
- the search signal includes information on the wavelength of the search signal, information on the port of the wavelength filter to which the transmitter / receiver in the station side of the transmission source is connected, Including information on the port of the connected wavelength filter, information on the wavelength to be used when each subscriber device responds, any one or more of the above information,
- the subscriber unit is configured to receive the search signal transmitted from one or a plurality of transmitters / receivers of the station side device, and to transmit / receive in the station side device based on information included in the search signal. Means for transmitting a response signal with respect to the search signal to a receiver.
- the station side device periodically and periodically uses search signals for detecting unregistered subscriber devices in all wavelengths used for downlink communication.
- An optical communication system wherein an output wavelength used for a response signal to the transceiver in the station side device is determined and the response signal is transmitted.
- Wavelength tunable filter 30 Wavelength filter 30 ': Wavelength filter 30 ", 31: Optical power splitter 32: Optical fibers 40, 40-1, 40-2, ..., 40-j, ..., 40-n: Optical power splitters 50, 50-1, 50-2,..., 50-j,..., 50-n: optical fibers 60, 60-1, 60-2,. .., 60-n: optical fibers 70, 70-1, 70-2,..., 70-j,..., 70-n: optical fibers 80, 80-1, 80-2,. 80-n: subscriber control unit 90: station side control units 101, 102, 103: optical transmission lines 301, 302, 303: optical communication system
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Abstract
Description
それぞれの前記局側光送受信器から、前記光伝送路の全ての前記加入者接続端に到達するように、所定時に探索信号を送信させる探索信号送信手順と、前記光伝送路の前記加入者接続端に接続された前記加入者装置が未登録である場合、前記探索信号を受信したときに、前記加入者装置の光送信器を前記探索信号に対応する波長に設定し、前記局側装置へ応答信号を送信させる応答信号送信手順と、を行うことを特徴とする。
図2は、本実施形態の光通信システム301の構成である。光通信システム301は、複数のユーザ装置としての加入者装置10と、センタ装置としての局側装置20と、周回性をもつ波長フィルタ30と、光パワースプリッタ40と、局側装置20と波長フィルタ30を接続する複数本の光ファイバ50と、波長フィルタ30と光パワースプリッタ40を一芯で接続する複数本の光ファイバ60と、光パワースプリッタ40と加入者装置10を一芯で接続する複数本の光ファイバ70から構成される。波長フィルタ30の加入者側ポートにおいて、光パワースプリッタ40を介さず、加入者装置が1つだけ直接接続される場合もある。光通信システム301は、時分割多重及び波長分割多重を効果的に組み合わせたPONシステムである。
例として、局側装置20内の光送受信器21-iから、加入者装置10-jへの下り信号の流れについて記述する。
例として、加入者装置10-j(1≦j≦n,jは整数)から局側装置内光送受信器21-i(1≦i≦m,iは整数)への上り信号の流れを記述する。
局側制御部90は、それぞれの光送受信器21に、光伝送路101の全ての加入者接続端に到達するように、所定時に探索信号(Discovery Gate)を送信させる。加入者制御部80は、光伝送路101の加入者接続端に接続された加入者装置10が未登録である場合、探索信号を受信したときに、加入者装置10の光送信器11を探索信号に対応する波長に設定し、局側装置20へ応答信号(Registration Request)を送信させる。探索信号を送信する所定時とは、定期的であってもよいし、新たに加入者装置10を接続するときでもよい。
本実施形態の構成は図2の光通信システム301と同じである。また、局側装置20と加入者装置10の上り信号及び下り信号の流れも光通信システム301と同様である。
局側制御部90が所定時に探索信号を送信する点及び加入者制御部80が光送信器11を探索信号に対応する波長に設定して局側装置20へ応答信号を送信させる点は実施形態1の説明と同じである。
図5は、実施形態3の光通信システム302の構成である。光通信システム302は、複数のユーザ装置としての加入者装置10と、センタ装置としての局側装置20と、光パワースプリッタ31と、波長フィルタ30’と、光パワースプリッタ31と波長フィルタ30’を接続する光ファイバ32と、光パワースプリッタ40と、局側装置20と波長フィルタ30’を接続する複数本の光ファイバ50と、波長フィルタ30’と光パワースプリッタ40を一芯で接続する複数本の光ファイバ60と、光パワースプリッタ40と加入者装置10を一芯で接続する複数本の光ファイバ70から構成される。波長フィルタ30’の加入者側ポートにおいて、光パワースプリッタ40を介さず、加入者装置が1つだけ接続される場合もある。光通信システム302は、時分割多重及び波長分割多重を効果的に組み合わせたPONシステムである。ここで、光伝送路102は、局側装置20から加入者装置10までの区間である。
例として、局側装置20内の光送受信器21-iから、加入者装置10-jへの下り信号の流れについて記述する。
例として、加入者装置10-j(1≦j≦n,jは整数)から局側装置内光送受信器21-i(1≦i≦m,iは整数)への上り信号の流れを記述する。
局側制御部90が所定時に探索信号を送信する点及び加入者制御部80が光送信器11を探索信号に対応する波長に設定して局側装置20へ応答信号を送信させる点は実施形態1の説明と同じである。
本実施形態の構成は図5の光通信システム302と同じである。また、局側装置20と加入者装置10の上り信号及び下り信号の流れも光通信システム302と同様である。
局側制御部90が所定時に探索信号を送信する点及び加入者制御部80が光送信器11を探索信号に対応する波長に設定して局側装置20へ応答信号を送信させる点は実施形態1の説明と同じである。
図7は、実施形態5の光通信システム303の構成を示す。光通信システム303は、複数のユーザ装置としての加入者装置10と、センタ装置としての局側装置20と、光パワースプリッタ30”と、局側装置20と光パワースプリッタ30”を接続する複数本の光ファイバ50と、光パワースプリッタ40と、光パワースプリッタ30”と光パワースプリッタ40を一芯で接続する複数本の光ファイバ60と、光パワースプリッタ40と加入者装置10を一芯で接続する複数本の光ファイバ70から構成される。光パワースプリッタ30”の加入者側ポートにおいて、光パワースプリッタ40を介さず、加入者装置が1つだけ接続される場合もある。光通信システム303は、時分割多重及び波長分割多重を効果的に組み合わせたPONシステムである。ここで、光伝送路103は、局側装置20から加入者装置10までの区間である。
例として、局側装置20内の光送受信器21-iから、加入者装置10-jへの下り信号の流れについて記述する。
例として、加入者装置10-j(1≦j≦n,jは整数)から局側装置内光送受信器21-i(1≦i≦m,iは整数)への上り信号の流れを記述する。
局側制御部90が所定時に探索信号を送信する点及び加入者制御部80が光送信器11を探索信号に対応する波長に設定して局側装置20へ応答信号を送信させる点は実施形態1の説明と同じである。
本実施形態の構成は図7の光通信システム303と同じである。また、局側装置20と加入者装置10の上り信号及び下り信号の流れも光通信システム301と同様である。
局側制御部90が所定時に探索信号(Discovery Gate)を送信する点及び加入者制御部80が光送信器11を探索信号に対応する波長に設定して局側装置20へ応答信号(Registration Request)を送信させる点は実施形態1の説明と同じである。
(1)
一の局側装置と複数の加入者装置から構成される一対多接続の光通信システムであって、前記局側装置は一組の出力波長を変化可能な光送信器と光受信器からなる光送受信器を一又は複数備え、前記加入者装置は一組の出力波長を変化可能な光送信器と受信器からなる光送受信器を備え、前記局側装置と前記加入者装置が一つまたは複数の光パワースプリッタもしくは波長フィルタを介して接続され、前記局側装置内送信器と前記加入者装置内受信器が通信する組み合せ、および前記加入者装置内送信器と前記局側装置内受信器が通信する組み合せが、時間的に変化する光通信システムにおいて、前記局側装置が、未登録の加入者装置を定期的に探索する手段を有する、ことを特徴とする光通信システムである。
(1)に記載の周期的に探索する第1の手段として、前記局側装置は、未登録の加入者装置を検知するための探索信号を下り通信に使用する全波長において定期的かつ周期的に発出する手段を有し、前記探索信号には、探索信号の波長の情報、発信元の局側装置内送受信器が接続されている前記波長フィルタのポートの情報、全局側装置内送受信器が接続されている前記波長フィルタのポートの情報、それぞれの加入者装置が応答する際に使用するべき波長の情報、上記のいずれかもしくは複数の情報を含み、
前記加入者装置は、前記局側装置の一又は複数の送受信器から送信された前記探索信号を受信する手段と、前記探索信号に含まれる情報を元にして、一の前記局側装置内送受信器に向けて前記探索信号に対する応答信号を送信する手段とを、有することを特徴とする光通信システムである。
(1)に記載の周期的に探索する第2の手段として、前記局側装置は、未登録の加入者装置を検知するための探索信号を下り通信に使用する全波長において定期的かつ周期的に発出する手段を有し、前記加入者装置は、前記局側装置の一又は複数の送受信器から送信された前記探索信号を受信する手段と、(2)に記載の「探索信号の波長の情報」および「発信元の局側装置内送受信器が接続されている前記波長フィルタのポートの情報」の組み合わせから、前記加入者装置自身が接続されている前記波長フィルタのポートの情報を算出する手段とを有し、前記局側装置内送受信器に対する応答信号に用いる出力波長を決定して前記応答信号を送信することを特徴とする光通信システムである。
11、11-1、11-2、・・・、11-j、・・・、11-n:光送信器
12、12-1、12-2、・・・、12-j、・・・、12-n:光受信器
13、13-1、13-2、・・・、13-j、・・・、13-n:波長合分波器
14、14-1、14-2、・・・、14-j、・・・、14-n:波長可変フィルタ
20:局側装置
21、21-1、21-2、・・・、21-i、・・・、21-m:送受信器
22、22-1、22-2、・・・、22-i、・・・、22-m:波長合分波器
23、23-1、23-2、・・・、23-i、・・・、23-m:光送信器
24、24-1、24-2、・・・、24-i、・・・、24-m:光受信器
25:波長可変フィルタ
30:波長フィルタ
30’:波長フィルタ
30”、31:光パワースプリッタ
32:光ファイバ
40、40-1、40-2、・・・、40-j、・・・、40-n:光パワースプリッタ
50、50-1、50-2、・・・、50-j、・・・、50-n:光ファイバ
60、60-1、60-2、・・・、60-j、・・・、60-n:光ファイバ
70、70-1、70-2、・・・、70-j、・・・、70-n:光ファイバ
80、80-1、80-2、・・・、80-j、・・・、80-n:加入者制御部
90:局側制御部
101、102、103:光伝送路
301、302、303:光通信システム
Claims (18)
- 下り信号を送信する光送信器及び上り信号を受信する光受信器を一組とする局側光送受信器を一又は複数有する局側装置と、
前記上り信号の波長を変化可能として送信する光送信器及び前記下り信号を受信する光受信器を一組とする加入者光送受信器を一又は複数有する加入者装置と、
前記加入者装置が接続される加入者接続端の数が前記加入者装置の台数以上であり、前記局側装置と前記加入者装置とを接続する光伝送路と、
を含むPONシステムの帯域割当装置であって、
それぞれの前記局側光送受信器に、前記光伝送路の全ての前記加入者接続端に到達するように、所定時に探索信号を送信させる局側制御部と、
前記光伝送路の前記加入者接続端に接続された前記加入者装置が未登録である場合、前記探索信号を受信したときに、前記加入者装置の光送信器を前記探索信号に対応する波長に設定し、前記局側装置へ応答信号を送信させる加入者制御部と、
を備える帯域割当装置。 - 前記局側制御部は、未登録の前記加入者装置の光送信器に設定する波長の波長情報を前記探索信号に含め、
前記加入者制御部は、前記探索信号に含まれる前記波長情報に基づいて前記加入者装置の光送信器の波長を決定することを特徴とする請求項1に記載の帯域割当装置。 - 前記局側制御部は、前記探索信号の波長の波長情報と前記探索信号を送信する前記局側装置の光送信器を識別する識別情報とを前記探索信号に含め、
前記加入者制御部は、前記波長情報と前記識別情報に対する前記加入者装置の前記光送信器に設定する波長との対応表を有し、前記探索信号に含まれる前記波長情報と前記識別情報に基づいて前記加入者装置の光送信器の波長を決定することを特徴とする請求項1に記載の帯域割当装置。 - 前記加入者装置は、前記上り信号の波長を変化可能として送信する光送信器及び受信波長を変化可能として所望の前記下り信号を受信する光受信器を一組とする加入者光送受信器を一又は複数有しており、
前記局側制御部は、未登録の前記加入者装置の光送信器に設定する波長の波長情報を前記探索信号に含め、
前記加入者制御部は、前記加入者装置の送受信器で受信可能な波長を周期的に変化させ、受信可能な波長の前記探索信号があるときに前記加入者装置の送受信器で受信させ、前記探索信号に含まれる前記波長情報に基づいて前記加入者装置の光送信器の波長を決定することを特徴とする請求項1に記載の帯域割当装置。 - 前記局側制御部は、1の前記局側光送受信器に前記探索信号を送信させることを特徴とする請求項4に記載の帯域割当装置。
- 前記局側制御部は、複数の前記局側光送受信器に前記探索信号を送信させることを特徴とする請求項4に記載の帯域割当装置。
- 前記探索信号に含まれる前記波長情報が複数の波長であり、
前記加入者制御部は、前記波長情報の複数の波長のうちランダムに選択した1つを前記加入者装置の光送信器の波長に決定することを特徴とする請求項4から6のいずれかに記載の帯域割当装置。 - 前記局側制御部は、前記加入者装置の前記応答信号を受信させたい前記局側光送受信器の受信波長を前記波長情報として前記探索信号に含めることを特徴とする請求項7に記載の帯域割当装置。
- 前記探索信号に含まれる前記波長情報が選択に関する重み付けがされた複数の波長であり、
前記加入者制御部は、前記波長情報の複数の波長のうち、前記重み付けに応じて選択した1つを前記加入者装置の光送信器の波長に決定することを特徴とする請求項4から6のいずれかに記載の帯域割当装置。 - 下り信号を送信する光送信器及び上り信号を受信する光受信器を一組とする局側光送受信器を一又は複数有する局側装置と、
前記上り信号の波長を変化可能として送信する光送信器及び前記下り信号を受信する光受信器を一組とする加入者光送受信器を一又は複数有する加入者装置と、
前記加入者装置が接続される加入者接続端の数が前記加入者装置の台数以上であり、前記局側装置と前記加入者装置とを接続する光伝送路と、
を含むPONシステムの帯域割当方法であって、
それぞれの前記局側光送受信器から、前記光伝送路の全ての前記加入者接続端に到達するように、所定時に探索信号を送信させる探索信号送信手順と、
前記光伝送路の前記加入者接続端に接続された前記加入者装置が未登録である場合、前記探索信号を受信したときに、前記加入者装置の光送信器を前記探索信号に対応する波長に設定し、前記局側装置へ応答信号を送信させる応答信号送信手順と、
を行うことを特徴とする帯域割当方法。 - 前記探索信号送信手順では、未登録の前記加入者装置の光送信器に設定する波長の波長情報を前記探索信号に含め、
前記応答信号送信手順では、前記探索信号に含まれる前記波長情報に基づいて前記加入者装置の光送信器の波長を決定することを特徴とする請求項10に記載の帯域割当方法。 - 前記探索信号送信手順では、前記探索信号の波長の波長情報と前記探索信号を送信する前記局側装置の光送信器を識別する識別情報とを前記探索信号に含め、
前記応答信号送信手順では、前記波長情報と前記識別情報に対する前記加入者装置の前記光送信器に設定する波長との対応表を有し、前記探索信号に含まれる前記波長情報と前記識別情報に基づいて前記加入者装置の光送信器の波長を決定することを特徴とする請求項10に記載の帯域割当方法。 - 前記加入者装置が、前記上り信号の波長を変化可能として送信する光送信器及び受信波長を変化可能として所望の前記下り信号を受信する光受信器を一組とする加入者光送受信器を一又は複数有しており、
前記探索信号送信手順では、未登録の前記加入者装置の光送信器に設定する波長の波長情報を前記探索信号に含め、
前記応答信号送信手順では、前記加入者装置の送受信器で受信可能な波長を周期的に変化させ、受信可能な波長の前記探索信号があるときに前記加入者装置の送受信器で受信させ、前記探索信号に含まれる前記波長情報に基づいて前記加入者装置の光送信器の波長を決定することを特徴とする請求項10に記載の帯域割当装置。 - 前記探索信号送信手順では、1の前記局側光送受信器に前記探索信号を送信させることを特徴とする請求項13に記載の帯域割当方法。
- 前記探索信号送信手順では、複数の前記局側光送受信器に前記探索信号を送信させることを特徴とする請求項13に記載の帯域割当方法。
- 前記探索信号に含まれる前記波長情報が複数の波長であり、
前記応答信号送信手順では、前記波長情報の複数の波長のうちランダムに選択した1つを前記加入者装置の光送信器の波長に決定することを特徴とする請求項13から15のいずれかに記載の帯域割当方法。 - 前記探索信号送信手順では、前記加入者装置の前記応答信号を受信させたい前記局側光送受信器の受信波長を前記波長情報として前記探索信号に含めることを特徴とする請求項16に記載の帯域割当方法。
- 前記探索信号に含まれる前記波長情報が選択に関する重み付けがされた複数の波長であり、
前記応答信号送信手順では、前記波長情報の複数の波長のうち、前記重み付けに応じて選択した1つを前記加入者装置の光送信器の波長に決定することを特徴とする請求項13から15のいずれかに記載の帯域割当方法。
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013207715A (ja) * | 2012-03-29 | 2013-10-07 | Oki Electric Ind Co Ltd | 加入者側装置登録方法及び光ネットワークシステム |
JP2013207716A (ja) * | 2012-03-29 | 2013-10-07 | Oki Electric Ind Co Ltd | 加入者側装置登録方法 |
JP5556921B1 (ja) * | 2013-03-01 | 2014-07-23 | 沖電気工業株式会社 | 加入者側装置登録方法及び光ネットワークシステム |
JP5588543B1 (ja) * | 2013-06-11 | 2014-09-10 | 日本電信電話株式会社 | ディスカバリ方法及び光伝送システム |
WO2016030961A1 (ja) * | 2014-08-26 | 2016-03-03 | 三菱電機株式会社 | 子局装置、親局装置、光通信システムおよび異常検出方法 |
WO2016150300A1 (zh) * | 2015-03-26 | 2016-09-29 | 中兴通讯股份有限公司 | 一种光网络单元业务信息的发放方法、装置及光线路终端 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5700600B2 (ja) * | 2011-12-21 | 2015-04-15 | 日本電信電話株式会社 | 帯域割当装置及び帯域割当方法 |
US10063411B2 (en) * | 2013-02-26 | 2018-08-28 | Zte Corporation | Channel map for optical network unit activation and rogue behavior prevention |
JP5482931B1 (ja) * | 2013-03-18 | 2014-05-07 | 沖電気工業株式会社 | 加入者側装置登録方法及び光ネットワークシステム |
US9425918B2 (en) * | 2013-04-19 | 2016-08-23 | Futurewei Technologies, Inc. | Flexible TWDM PON with load balancing and power saving |
US10211944B2 (en) * | 2015-05-26 | 2019-02-19 | Nippon Telegraph And Telephone Corporation | Station-side device and communication method |
US9729950B2 (en) * | 2015-11-25 | 2017-08-08 | Google Inc. | Upgrading PON systems using a multi-cycle field AWG |
CN108633325A (zh) * | 2017-01-24 | 2018-10-09 | 华为技术有限公司 | 一种无源光网络pon的通信方法、装置和系统 |
CN115118376B (zh) * | 2022-07-29 | 2024-07-23 | 安徽电信规划设计有限责任公司 | 一种wdm系统环网调波方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007324885A (ja) * | 2006-05-31 | 2007-12-13 | Mitsubishi Electric Corp | 光通信方法、光通信ネットワークシステム、親局光通信装置、子局光通信装置 |
JP2011139320A (ja) * | 2009-12-28 | 2011-07-14 | Nippon Telegr & Teleph Corp <Ntt> | 光通信システム、局側装置、加入者側装置、及び光通信方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5212577A (en) * | 1990-01-19 | 1993-05-18 | Canon Kabushiki Kaisha | Optical communication equipment and optical communication method |
KR100703349B1 (ko) * | 2004-11-29 | 2007-04-03 | 삼성전자주식회사 | 파장분할다중 방식의 수동형 광가입자망의 동작 방법 |
KR100570842B1 (ko) * | 2004-12-13 | 2006-04-13 | 한국전자통신연구원 | 파장 분할 다중화 수동 광 가입자망(wdm-pon)에서의통신, 방송 융합을 위한 동적 멀티캐스트 그룹 관리 및서비스 파장 할당방법 |
JP4704842B2 (ja) * | 2005-08-01 | 2011-06-22 | 株式会社日立製作所 | Wdm型ponシステム |
JP4827850B2 (ja) * | 2006-01-27 | 2011-11-30 | 日本電信電話株式会社 | 光波長多重アクセスシステム |
JP4818749B2 (ja) | 2006-02-23 | 2011-11-16 | 三菱電機株式会社 | 局側装置、および受動型光加入者ネットワークシステム |
JP4891715B2 (ja) | 2006-09-15 | 2012-03-07 | 富士通テレコムネットワークス株式会社 | 受動型光ネットワークシステム |
JP4994300B2 (ja) | 2008-05-29 | 2012-08-08 | 日本電信電話株式会社 | 光終端装置 |
KR101253325B1 (ko) * | 2008-12-22 | 2013-04-12 | 한국전자통신연구원 | Wdm-pon에서의 랜 에뮬레이션 방법 |
JP5079680B2 (ja) | 2008-12-24 | 2012-11-21 | 日本電信電話株式会社 | 光送信装置、送信波長確認方法および送信波長設定方法 |
JP5600028B2 (ja) * | 2010-04-15 | 2014-10-01 | 日本電信電話株式会社 | 加入者側装置、局側装置、光通信システム及び光通信方法 |
EP2538591B1 (en) * | 2011-06-21 | 2013-08-07 | Telefonaktiebolaget L M Ericsson (publ) | Wavelength division multiplexed passive optical network apparatus and methods of configuration |
JP5651548B2 (ja) * | 2011-06-30 | 2015-01-14 | 株式会社日立製作所 | 局側装置、光ネットワークシステム |
JP5700600B2 (ja) * | 2011-12-21 | 2015-04-15 | 日本電信電話株式会社 | 帯域割当装置及び帯域割当方法 |
-
2012
- 2012-12-18 JP JP2013550283A patent/JP5700600B2/ja active Active
- 2012-12-18 US US14/350,953 patent/US9236971B2/en active Active
- 2012-12-18 WO PCT/JP2012/082772 patent/WO2013094594A1/ja active Application Filing
- 2012-12-18 KR KR1020147012419A patent/KR101571987B1/ko active IP Right Grant
- 2012-12-18 CN CN201280059405.1A patent/CN104040960B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007324885A (ja) * | 2006-05-31 | 2007-12-13 | Mitsubishi Electric Corp | 光通信方法、光通信ネットワークシステム、親局光通信装置、子局光通信装置 |
JP2011139320A (ja) * | 2009-12-28 | 2011-07-14 | Nippon Telegr & Teleph Corp <Ntt> | 光通信システム、局側装置、加入者側装置、及び光通信方法 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013207715A (ja) * | 2012-03-29 | 2013-10-07 | Oki Electric Ind Co Ltd | 加入者側装置登録方法及び光ネットワークシステム |
JP2013207716A (ja) * | 2012-03-29 | 2013-10-07 | Oki Electric Ind Co Ltd | 加入者側装置登録方法 |
JP5556921B1 (ja) * | 2013-03-01 | 2014-07-23 | 沖電気工業株式会社 | 加入者側装置登録方法及び光ネットワークシステム |
JP5588543B1 (ja) * | 2013-06-11 | 2014-09-10 | 日本電信電話株式会社 | ディスカバリ方法及び光伝送システム |
WO2016030961A1 (ja) * | 2014-08-26 | 2016-03-03 | 三菱電機株式会社 | 子局装置、親局装置、光通信システムおよび異常検出方法 |
CN106576066A (zh) * | 2014-08-26 | 2017-04-19 | 三菱电机株式会社 | 子站装置、母站装置、光通信系统及异常检测方法 |
JPWO2016030961A1 (ja) * | 2014-08-26 | 2017-04-27 | 三菱電機株式会社 | 子局装置、光通信システムおよび異常検出方法 |
US9906403B2 (en) | 2014-08-26 | 2018-02-27 | Mitsubishi Electric Corporation | Slave station device, master station device, optical communication system, and malfunction detection method |
WO2016150300A1 (zh) * | 2015-03-26 | 2016-09-29 | 中兴通讯股份有限公司 | 一种光网络单元业务信息的发放方法、装置及光线路终端 |
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KR20140084148A (ko) | 2014-07-04 |
CN104040960B (zh) | 2017-03-01 |
KR101571987B1 (ko) | 2015-12-04 |
JP5700600B2 (ja) | 2015-04-15 |
US9236971B2 (en) | 2016-01-12 |
JPWO2013094594A1 (ja) | 2015-04-27 |
US20140294391A1 (en) | 2014-10-02 |
CN104040960A (zh) | 2014-09-10 |
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