JP6459588B2 - Access control system, access control method, master station device, and slave station device - Google Patents

Description

  The present invention relates to an access control system, an access control method, a master station device, and a slave station device, and can be applied to a control method in a PON (Passive Optical Network) system, for example.

  In recent years, the PON system used in FTTH (Fiber To The Home) is the IEEE (The Institute of Electrical and Electrical Engineers, Inc.) 802.3ah standard GE-PON OetetEwetEw It has been broken.

  In addition, as an optical access system for achieving higher speed and wider bandwidth, IEEE802.3av 10G-EPON, ITU-T G. The 987 series standard XG-PON has been established, and the NG-PON2 (Next Generation-Passive Optical Network2) standard is under discussion as a 989 series standard 40G class optical access system.

  Non-Patent Document 1 includes ITU-T G.I. 987.3 standard technology is defined, frame structure related to communication between OLT and ONU of XG-PON, discovery method that OLT discovers unregistered ONU, message between OLT and ONU PLOAM (Physical Layer Operations, Administration and Maintenance) standards and information insertion positions for exchanging are defined.

  FIG. 2 is a configuration diagram showing a configuration example of an optical access network employing a conventional GE-PON, and FIG. 3 is a functional block diagram of a GE-PON OLT and a GE-PON ONU configuring the GE-PON. The GE-PON system that is widely used at present shares a 1 Gbit / s band among a plurality of ONUs (for example, 32 users).

  4 is a block diagram showing a configuration example of an optical access network adopting a conventional XG-PON system, and FIG. 5 is a functional block diagram of XG-PON OLT and XG-PON ONU constituting XG-PON. It is. For example, in order to increase the speed and bandwidth of network services, it is considered to introduce a system that shares a 10 Gbit / s bandwidth among a plurality of ONUs (for example, 32 users and 64 users).

ITU-TG. 987.3 Standard “10-Gigabit-capabe1 passive optical1 networks (XG-PON): Transmission convergence (TC) layer specification”

  Incidentally, for example, as illustrated in FIG. 6, XG-PON and GE-PON are accommodated by accommodating GE-PON OLT having a bandwidth of 1 Gbit / s via XGPON ONU having a bandwidth of 10 Gbit / s. Coexisting configurations can be considered.

  In such a configuration, the XG-PON OLT 800 is an ITU-T G. By using the discovery method defined in the 987.3 standard, registration of XG-PON ONUs 900-1 to 900-M and information exchange using PLOAM are possible.

  However, XG-PON OLT 900 cannot perform device registration or information exchange using PLOAM of GE-PON OLT 600 or GE-PON ONU 700-1 to 700-N.

  Therefore, as shown in FIG. 6, the operation and maintenance monitoring control network and operation system (OpS) 15 for GE-PON and the operation and maintenance monitoring control network and operation system (OpS) 10 for XG-PON are individually provided. The problem of needing to be installed in can arise. By providing separate operation systems (OpS), the operation and maintenance becomes complicated, and the cost burden related to the operation and maintenance increases.

  Therefore, for example, an access control system, an access control method, and a master station device capable of performing integrated monitoring control of maintenance operation of an end device of an access network in which different PON systems coexist, such as GE-PON and XG-PON. There is a need for a slave station device.

In order to solve this problem, an access control system according to a first aspect of the present invention is a network in which a first passive optical network system and a second passive optical network system are mixed, and the first passive optical network system is In an access control system that performs access control between a first slave station device that constitutes a second slave station device that constitutes a second passive optical network system, (1) a first adopting the first passive optical network system; 1 of the parent station, (a-1) a first slave station apparatus, and or, the monitoring control means for monitoring the control process of the second slave station, (a-2) the first master station Exchanged between the first slave station information managing means for managing the first identification information corresponding to the first slave station apparatus connected to the apparatus , and (A-3) the first slave station apparatus. and a first master station processing means for processing the first control frame that, (B) the first slave station Location is allocated from the first and the slave station processing means for processing control frames, (B-2) a first parent station device exchanged between the (B-1) a first master station In addition , the second slave station information management means for managing the first identification information and (B-3) one or a plurality of second slave station devices can be connected to each connected second slave. One or a plurality of second master station processing means for performing processing of the second control frame with the station device , and acquiring second identification information corresponding to each second slave station device; with (B-4) and the third identification information corresponding to each of the second master station processing means, and a third slave station information management means for managing in association with the second identification information, the slave station processing means, third identification information and second identification information, and inserted in a specific area of the first control frame and transmitted to the first master station apparatus, the first slave station information management Stage, included in the first control frame first slave station apparatus or et received, the third identification information and second identification information, the first identification of the corresponding first slave station It is characterized by being managed in association with information.

The access control method according to the second aspect of the present invention is the first slave station apparatus constituting the first passive optical network system in a network in which the first passive optical network system and the second passive optical network system are mixed. And an access control method for performing access control between a second slave station apparatus constituting the second passive optical network system and (1) a first master station apparatus adopting the first passive optical network system is : A-1) The monitoring control processing means performs the monitoring control processing of the first slave station apparatus and / or the second slave station apparatus, and (A-2) the first master station processing means performs the first performs processing of the first control frame exchanged between the slave stations, (a-3) the first slave station information management means, first connecting with the first master station managing first identification information corresponding to the slave station apparatuses, (B) the first slave station apparatus, the (B-1) slave station processing means, Performs processing of the first control frame exchanged between the first master station, (B-2) a second slave station information management means, allocated from the first master station apparatus, the first of managing the identification information, (B-3), each one or a plurality of second master station processing means being connectable 1 or a plurality of second slave station, the connected respective second The second control frame is processed with the slave station device , second identification information corresponding to each second slave station device is acquired, and (B-4) third slave station information management means a third identification information corresponding to each of the second master station processing means, in association with the second identification information management, the slave station processing means, third identification information and second identification the information is inserted in a specific area of the first control frame and transmitted to the first master station apparatus, the first slave station information management means, and the first slave station apparatus or we received 1 of Included in your frame, the third identification information and second identification information, and wherein the managing in association with the first identification information of the corresponding first slave station apparatus.

A master station device according to a third aspect of the present invention is a master station device that employs the first passive optical network system in a network in which the first passive optical network system and the second passive optical network system are mixed. 1) supervisory control means for performing supervisory control processing of the first slave station device constituting the first passive optical network system and / or the second slave station device constituting the second passive optical network system; 2) a first slave station information management means for managing the first identification information corresponding to the first slave station devices connected with those parent station apparatus, and (3) the first slave station and a first master station processing means for processing the first control frame exchanged between the first slave station information management means, the first control frame received from the first slave station It included, corresponding to the third identification information and the second slave station apparatus corresponding to the second master station processing means of the first slave station That the second identification information, and wherein the managing in association with the first identification information of the corresponding first slave station apparatus.

A slave station apparatus according to a fourth aspect of the present invention is a slave station apparatus that employs the first passive optical network system in a network in which the first passive optical network system and the second passive optical network system are mixed. 1) slave station processing means for processing the first control frame transmitted / received to / from the first master station device of the first passive optical network system; and (2) assigned from the first master station device. and a second slave station information management means for managing the identification information corresponding to the first slave station, and (3) one or more constituting the second passive optical network system second slave station A second control frame can be processed with each connected second slave station device, and second identification information corresponding to each second slave station device is obtained. one or a plurality of second master station processing means, and the third identification information corresponding to (4) each of the second master station processing means And a third slave station information management means for managing in association with the second identification information, the slave station processing means, the third identification information and second identification information, the first control It is inserted into a specific area of the frame and transmitted to the first master station device.

  ADVANTAGE OF THE INVENTION According to this invention, the monitoring control of the maintenance operation of the termination | terminus apparatus of the access network where a different PON system coexists can be performed integrally.

It is a block diagram which shows the functional structure of XG-PON OLT which concerns on embodiment. It is a block diagram which shows the structural example of the optical access network which employ | adopted the conventional GE-PON. It is a functional block diagram of GE-PON OLT and GE-PON ONU which comprise GE-PON. It is a block diagram which shows the structural example of the optical access network which employ | adopted the conventional XG-PON system. It is a functional block diagram of XG-PON OLT and XG-PON ONU which comprise the conventional XG-PON. It is explanatory drawing explaining the monitoring method by the operation system when the conventional GE-PON and XG-PON coexist. It is a block diagram which shows the functional structure of XG-PON ONU which concerns on embodiment. 1 is a configuration diagram showing an overall configuration of an optical access network according to an embodiment. ITU-T G. It is a block diagram which shows the structure of the downstream frame currently standardized to 987.3. ITU-T G. It is a block diagram which shows the structure of the upstream frame currently standardized to 987.3. It is a flowchart which shows the processing operation in the optical access network 1 which concerns on embodiment.

(A) Main Embodiments Hereinafter, main embodiments of an access control system, an access control method, a master station apparatus, and a slave station apparatus according to the present invention will be described in detail with reference to the drawings.

  In this embodiment, a case where the present invention is applied to an optical access network in which XG-PON and GE-PON are mixed is illustrated.

(A-1) Configuration of Embodiment (A-1-1) Configuration of Optical Access Network FIG. 8 is a configuration diagram showing an overall configuration of the optical access network according to the embodiment.

  In FIG. 8, the optical access network 1 according to the embodiment is a mixture of XG-PON and GE-PON (coexistence). In the example of FIG. 8, the case where the XG-PON system is generally applied as a telecommunications carrier network and the GE-PON system is applied as a subscriber side network is illustrated.

  An XG-PON used as a communication carrier network includes an XG-PON OLT 100 connected by an optical cable via an optical splitter 50-1, a plurality of XG-PON ONUs 200-1 to 200-M (M is an integer), XG-PON operation system (OpS) 10. In the following, when a function common to all XG-PON ONUs is described, it is expressed as XG-PON ONU 200.

  The communication method between the XG-PON OLT 100 and the XG-PON ONU 200 is ITU-T GG. Technology standardized in the 987 series and future ITU-T G. 987 series expansion technology or the like can be applied.

  WDM (Wavelength Division Multiplexing) systems using different wavelengths for communication from XG-PON OLT 100 to XG-PON ONU 200 (downlink communication) and communication from XG-PON ONU 200 to XG-PON OLT 100 (uplink communication), respectively. Is used. In addition, since one optical fiber is shared by a plurality of XG-PON ONUs 200, uplink communication from the XG-PON ONU 200 to the XG-PON OLT 100 uses, for example, a TDMA (Time Division Multiple Access) system. The collision of communication signals is avoided.

  The optical splitter 50-1 distributes the downstream signal transmitted from the XG-PON OLT 100 to the XG-PON ONU 200, multiplexes the upstream signal transmitted from the XG-PON ONU 200, and provides the multiplexed signal to the XG-PON OLT 100. It is. The optical splitter 50-1 is an example of a wavelength distribution multiplexer.

  The XG-PON OLT 100 is an optical signal terminator (Optical Line Terminal) that employs XG-PON and is connected to the optical splitter 50-1 through an optical fiber. It is connected to the network 30. The XG-PON OTL 100 controls point-to-multipoint communication in order to perform access control of each XG-PON ONU 200 by TDMA. That is, the XG-PON OLT 100 controls the point-to-multipoint communication by exchanging the control frame with each XG-PON ONU 200.

  Here, prior to communication with each XG-PON ONU 200, the XG-PON OLT 100 detects the unregistered XG-PON ONU and the identification information (ONU-ID) of the unregistered XG-PON ONU. ), Registration of identification information (LLID: Logical Link ID) of GE-PON ONU 700 (700-1 to 700-N) accommodated in each XG-PON ONU 200, communication time (transmission timing and transmission time) And bandwidth allocation. These processes are described in ITU-TG. A 987.3 standardization technique can be applied.

  Each XG-PON ONU 200 is a subscriber-side optical network unit (Optical Network Unit), which is connected to the optical splitter 50-1 through an optical fiber and connected to the optical splitter 50-2 through a UNI (User Network Interface). It connects with GE-PON ONU700 via this.

  Each XG-PON ONU 200 establishes a link with the XG-PON OLT 100 through a discovery process with the XG-PON OLT 100, and performs communication with the bandwidth and communication time allocated by the XG-PON OLT 100.

  Here, each XG-PON ONU 200 performs a discovery process with the GE-PON ONU 700 accommodated via the optical splitter 50-2, and receives identification information (LLID) from the GE-PON ONU 700 with which the link is established. get.

  Each XG-PON ONU 200 transmits a frame in which the identification information (LLID) and its own identification information (ONU-ID) are inserted into the PLOAM area from the GE-PON ONU 700 to the XG-PON OLT 100. Thereby, identification information (LLID) can be notified to XG-PON OLT 100 from GE-PON ONU 700 accommodated in each XG-PON ONU 200.

  The optical splitter 50-2 distributes the downstream signal transmitted from the XG-PON ONU 200 to the GE-PON ONU 700, or multiplexes the upstream signal transmitted from the GE-PON ONU 700 and gives it to the XG-PON ONU 200. It is. The optical splitter 50-2 is an example of a wavelength distribution multiplexer.

  The GE-PON ONU 700 is a subscriber-side optical signal termination device that employs GE-PON. The GE-PON ONU 700 establishes a link through a discovery process with the XG-PON ONU 200 and notifies its identification information (LLID). Note that a standardization technique such as IEEE 802.3ah can be applied to the discovery process.

  The terminal 40 is a subscriber terminal, and for example, a personal computer or a telephone terminal can be applied.

(A-1-2) Detailed Configuration of XG-PON OLT FIG. 1 is a block diagram showing a functional configuration of the XG-PON OLT 100 according to this embodiment.

  Access control between the XG-PON OLT 100 and a plurality of XG-PON ONUs 200 is performed by ITU-T G. 987.3 standard technology can be applied.

  Although the detailed configuration of the hardware of the XG-PON OLT 100 is not shown, for example, a control board having a CPU, a ROM, a RAM, an input / output interface, or the like (or a dedicated LSI, etc.) is similar to the existing OLT configuration. Hardware), an interface unit for exchanging signals with an upper network 30 such as the Internet, a network interface board having an optical signal interface, and the like.

  The functional blocks of the XG-PON OLT 100 shown in FIG. 1 are mainly executed by a control board having a CPU and the like, and are realized by the CPU executing a processing program stored in the ROM. In addition, various functions may be realized by installing each processing program in the XG-PON OLT 100. Even in this case, each processing program that causes the computer to function is a functional block shown in FIG. Can be shown as

  In FIG. 1, an XG-PON OLT 100 according to this embodiment includes an OLT upstream frame processing unit 110, an OLT downstream frame processing unit 120, a 10G SNIMAC processing unit 130, a PON optical transmission / reception unit 140, and an in-device monitoring control unit 150.

  The XG-PON OLT 100 is connected to a plurality (M: M is a positive integer) of XG-PON ONUs 200 via an optical splitter 50-1, and is exchanged with the plurality of XG-PON ONUs 200. The optical signal is terminated. The XG-PON OLT 100 is connected to an upper network 30 such as the Internet, and exchanges signals with the upper network 30. Furthermore, the XG-PON OLT 100 is connected to an operation system (OpS) 10 that controls operation and maintenance via the monitoring control network 20.

  The PON optical transmission / reception unit 140 converts a transmission signal (electric signal) from the OLT downstream frame processing unit 120 into an optical signal and transmits the optical signal to the optical splitter 50-1 via the optical cable, or the optical splitter 50 -1 is converted into a received signal (electrical signal) and given to the OLT upstream frame processing unit 110.

  The OLT upstream frame processing unit 110 performs an analysis process on the upstream frame from the PON optical transmission / reception unit 140, and provides a data signal included in the upstream frame to the 10G SNIMAC processing unit 130. The OLT upstream frame processing unit 110 basically has an ITU-T G. 987.3 standard technology can be applied. The OLT upstream frame processing unit 110 includes a PHY frame detection unit 111, an XGTC frame detection unit 112, and an XGEM frame detection unit 113, as in the existing technology.

  The PHY frame detection unit 111 detects a PHY frame from the received signal from the PON optical transmission / reception unit 140 and supplies the PHY frame to the XGTC frame detection unit 112.

  The XGTC frame detection unit 112 extracts an XGTC frame from the PHY frame acquired from the PHY frame detection unit 111 and provides the XGTC frame to the in-device monitoring control unit 150 and the XGEM frame detection unit 113.

  The XGEM frame detection unit 113 extracts an XGEM frame from the XGTC payload acquired from the XGTC frame detection unit 112 and supplies the XGEM frame to the 10G SNIMAC processing unit 130.

  The OLT downstream frame processing unit 120 receives a data signal from the 10G SNIMAC processing unit 130, generates a downstream frame including the data signal, and provides the generated frame to the PON transmission / reception unit 140. The OLT downstream frame processing unit 120 basically also has an ITU-T G. The 987.3 standard technology can be applied, and the XGEM frame generation unit 121, the XGTC frame generation unit 122, and the PHY frame generation unit 123 are included as in the existing technology.

  The XGEM frame generation unit 121 generates an XGEM frame including the data signal received from the higher layer 30 from the 10G SNIMAC processing unit 130 and supplies the XGEM frame generation unit 122 with the XGEM frame generation unit 122.

  The XGTC frame generation unit 122 generates an XGTC payload including the XGTC frame acquired from the XGEM frame generation unit 121, and adds the XGTC header acquired from the in-device monitoring control unit 150 to the XGTC payload to generate an XGTC frame. , It is given to the PHY frame generation unit 123.

  The PHY frame generation unit 123 generates a PHY frame by adding a PHY header to the XGTC frame acquired from the XGTC frame generation unit 122 and supplies the PHY frame to the PON optical transmission / reception unit 140.

  The 10G SNIMAC processing unit 130 converts the data signal from the OLT upstream frame processing unit 110 into a communication protocol of the higher level network 30 and transmits it to the higher level network 30 or transmits the signal from the higher level network 30 to the OLT downstream frame processing unit. 120.

  The in-device monitoring control unit 150 monitors the XG-PON ONU 200 located under the XG-PON OLT 100, and the identification information (ONU-ID) of each XG-PON ONU 200 and each XG-PON ONU 200 are accommodated. Management of the identification information (LLID) of the GE-PON ONU 700 that is being performed, transmission timing for each XG-PON ONU 200, bandwidth allocation control, and the like are performed.

  The in-device monitoring control unit 150 includes a monitoring control unit 151, an ONU management unit 152, an XGTC header / PLOAM generation unit 153, and an XGTC header / PLOAM detection unit 154.

  The XGTC header / PLOAM detection unit 154 extracts the XGTC header from the XGTC frame acquired from the XGTC frame detection unit 112. At this time, the XGTC header / PLOAM detection unit 154 extracts information on the PLOAM area included in the extracted XGTC header and notifies the monitoring control unit 151 and the ONU management unit 152 of the information.

  The ONU management unit 152 manages information included in the POAM area from the XGTC header / PLOAM detection unit 154. The PLOAM area includes identification information (LLID) of the GE-PON ONU 700 accommodated by the XG-PON ONU 200.

  The ONU management unit 152 manages the identification information (ONU-ID) of each XG-PON ONU 200 and the acquired identification information (LLID) of the GE-PON ONU 700 in association with each other.

  The XGTC header / PLOAM generation unit 153 receives the control of the monitoring control unit 151, and the identification information (ONU-ID) of the XG-PON ONU 200 and the identification information of the GE-PON ONU 700 held in the ONU management unit 152. Based on the correspondence information with (LLID), an XGTC header is generated and provided to the XGTC frame generation unit 122.

  The monitoring control unit 151 is connected to the XG-PON OpS 10 via the monitoring control network 20 and performs access control with the XG-PON ONU 200. When the operation control information for the XG-PON ONU 200 or the GE-PON ONU under the control of the XG-PON ONU 200 is acquired from the OpS 10, the monitoring control unit 151 gives the operation maintenance information to the XGTC header / PLOAM generation unit 153.

(A-1-3) Configuration of XG-PON ONU FIG. 7 is a block diagram illustrating a functional configuration of the XG-PON ONU 200 according to the embodiment.

  Although the detailed configuration of the hardware of the XG-PON ONU 200 is not shown, for example, a control board having a CPU, ROM, RAM, input / output interface, etc. Hardware) and a network interface board having an optical signal interface or the like.

  The functional blocks of the XG-PON ONU 200 shown in FIG. 7 are mainly executed by a control board having a CPU or the like, and are realized by the CPU executing a processing program stored in the ROM. . In addition, various functions may be realized by installing each processing program in the XG-PON ONU 200. Even in this case, each processing program for causing the computer to function is a functional block shown in FIG. Can be shown as

  In FIG. 7, the XG-PON ONU 200 according to this embodiment is roughly divided into an XG-PON ONU function unit 210, a GE-PON OLT function unit 250, an uplink format conversion circuit 310, a downlink format conversion circuit 320, and in-device monitoring control. Part 330.

  In addition, although the case where there is one GE-PON OLT function unit 250 is illustrated, a plurality of GE-PON OLT function units 250 may be provided. In that case, in order to identify each GE-PON OLT function part 250, it can identify by giving a GE-PON ONU number.

  The GE-PON OLT function unit 250 functions as an OLT of the GE-PON, and includes a PON optical transmission / reception unit 290, a SerDes (Serializer / Deserializer) unit 280, a GE-PON OLT upstream frame processing unit 260, and a GE-PON OLT. A downlink frame processing unit 270 is included.

  The XG-PON ONU function unit 210 is a part that functions as an ONG of the XG-PON, and includes a PON optical transmission / reception unit 220, an XG-PON ONU upstream frame processing unit 230, and an XG-PON ONU downstream frame processing unit 240.

  That is, the XG-PON ONU 200 according to this embodiment has a function as an XG-PON ONU and a function as a GE-PON OLT. The XG-PON ONU 200 acquires and manages the LLID of the accommodated GE-PON ONU 700 using GE-PON's IEEE 802.3a standard technology, and also manages the ITU-T G. A frame including its own ONU-ID and each LLID is notified to the XG-PON OLT 100 using the 987.3 standard technology.

  The PON optical transmission / reception unit 220 is connected to the XG-PON ONU downstream frame processing unit 240, is connected to the downstream format conversion circuit 320, is connected to the GE-PON OLT downstream frame processing unit 270, and is transmitted to the PON optical transmission / reception via the SerDes unit. Connected to the unit 290.

  Further, the PON optical transmission / reception unit 290 is connected to the GE-PON OLT upstream frame processing unit 250 via the SerDes unit 280, is connected to the upstream format conversion circuit 310, is connected to the XG-PON ONU upstream frame processing unit 210, It is connected to the optical splitter 50-1 through the PON optical transmission / reception unit 220.

  The PON optical transmission / reception unit 220 is connected to the optical splitter 50-1 by an optical cable, converts the optical signal received from the optical splitter into an electrical signal, and provides it to the XG-PON ONU downstream frame processing unit 240.

  The XG-PON ONU downstream frame processing unit 240 extracts an XGTC frame from the received signal, gives the XGTC frame to the in-device monitoring control unit 330, extracts the XGEM frame, and gives it to the downstream format conversion circuit 320. To do. The XG-PON ONU downstream frame processing unit 240 includes a PHY frame detection unit 241, an XGTC frame detection unit 242, and an XGEM frame detection unit 243.

  The downlink format conversion circuit 320 converts the XG-PON frame into the GE-PON frame format and provides the converted frame to the GE-PON OLT downlink frame processing unit 270.

  The GE-PON OLT downlink frame processing unit 270 generates a transmission signal by adding data from the device monitoring control unit 330 to the frame acquired from the downlink format conversion circuit 320 and supplies the frame to the SerDes unit 280.

  The GE-PON OLT downlink frame processing unit 270 includes an OAM generation unit 271, an MPCP generation unit 272, a PON header generation unit 273, and a PCS generation unit 274.

  The OAM generation unit 271 generates an OAM frame by adding the OAM header acquired from the in-device monitoring control unit 330 to the data whose format has been converted by the downlink format conversion circuit 320. Also, the OAM generation unit 271 gives the generated OAM frame to the MPCP generation unit 272.

  Here, the OAM header includes transmission source information, destination information, and the like. The transmission source information is address information when functioning as a GE-PON OLT, and the destination information is address information of the accommodated GE-PON ONU 700. That is, the in-device monitoring control unit 330 holds address information when functioning as a GE-PON OLT as described later, and uses the address information as transmission source information.

  The MPCP generation unit 272 generates an MPCP frame including the OAM frame from the OAM generation unit 271.

  The PON header generation unit 273 generates a PON header by adding information including the LLID acquired from the in-device monitoring control unit 33 to the MPCP frame generated by the MPCP generation unit 272, and generates the PON header in the PCS generation unit 274. give. Here, the LLID is the LLID of each GE-PON ONU 700 accommodated by the XG-PON ONU 200.

  The PCS generation unit 274 generates a PCS frame by adding the PON header from the PON header generation unit 273 to the frame, and supplies the PCS frame to the SerDes unit 280.

  The SerDes unit 280 performs input serial / parallel conversion.

  The PON optical transmission / reception unit 290 is connected to the GE-PON ONU 700 via an optical splitter 50-2 via an optical cable, converts the optical signal received from the optical splitter 50-2 into an electrical signal, and provides the SerDes unit 280 with the electrical signal. Or the signal from the SerDes unit 280 is converted into an optical signal and transmitted.

  The GE-PON OLT upstream frame processing unit 260 analyzes the received signal (the frame format of the IEEE 802.3ah standard) acquired from the SerDes unit 280, and supplies the OAM frame to the upstream format conversion circuit 310.

  The GE-PON OLT upstream frame processing unit 260 includes a PCS detection unit 261, a PON header detection unit 262, an MPSP detection unit 263, and an OAM detection unit 264, similarly to the existing GE-PON OLT.

  The PCS detection unit 261 detects a PCS frame from the received signal and gives it to the PON header detection unit 262.

  The PON detection unit 262 extracts the PON header from the PCS frame acquired from the PCS detection unit 261, and provides the PON header to the MPCP detection unit 263 and the in-device monitoring control unit 330.

  The OAM detection unit 264 extracts an OAM frame from the MPCP frame acquired from the MPCP detection unit 263, and provides the OAM frame to the uplink format conversion circuit 310 and the in-device monitoring control unit 330.

  The uplink format conversion circuit 310 converts the GE-PON frame into the XG-PON frame format and provides the converted frame to the XG-PON ONU upstream frame processing unit 230.

  The XG-PON ONU upstream frame processing unit 210 generates an XG-PON upstream frame from the frame converted by the upstream format conversion circuit 310 and provides it to the PON optical transmission / reception unit 220. The XG-PON ONU upstream frame processing unit 210 includes an XGEM frame generation unit 231, an XGTC frame generation unit 232, and a PHY frame generation unit 233.

  The XGEM frame generation unit 231 generates an XGEM frame by adding an XGEM header to the data from the upstream format conversion circuit 310.

  The XGTC frame generation unit 232 adds an XGTC header to the XGEM frame generated by the XGEM frame generation unit 231 to generate an XGTC frame.

  Here, the XGTC header includes a PLOAM area. The ONU-ID of the XG-PON ONU 200 is inserted into the PLOAM area, and the GE-PON ONU 700 accommodated by the XG-PON ONU 200 is accommodated. Insert LLID.

  The PHY frame generation unit 233 generates a PHY frame by adding a PHY header to the XGTC frame generated by the XGTC frame generation unit 232 and supplies the PHY frame to the PON optical transmission / reception unit 220.

  The in-device monitoring control unit 330 includes an OLT / LLID management unit 331, an ONU-ID management unit 332, an XGTC header / PLOAM generation unit 333, and an XGTC header / PLOAM detection unit 334.

  The OLT / LLID management unit 331 manages the OLT identification information of the GE-PON in association with the ONU-ID and LLID of the GE-PON ONU 700.

  The ONU-ID management unit 332 manages the ONU-ID assigned by the XG-PON OLT 100 in XG-PON.

  The XGTC header / PLOAM detection unit 334 extracts the XGTC header from the XGTC frame detected by the XGTC frame detection unit 242, and receives the ONU-ID assigned by the XG-PON OLT 100 from the PLOAM area included in the XGTC header. , And stored in the ONU-ID management unit 332.

  The XGTC header / PLOAM detection unit 334 searches the LLID and ONU (GE-PON) number with reference to the OLT / LLID management unit 331 when the LLID is included in the POAM area of the XGTC header. The LLID and ONU (GE-PON) number are given to the OAM generation unit 271.

  The XGTC header / PLOAM generation unit 333 refers to the ONU-ID management unit 332 and the OLT / LLID management unit 331 based on the ONU-ID included in the OAM of the upstream frame from the OAM detection unit 264, and generates an XGTC header. Is generated and given to the XGTC frame generation unit 232.

(A-1-4) ITU-TG 987.3 Standard Frame Format Here, ITU-T G. The configuration of the downstream frame and the configuration of the upstream frame, which are standardized to 987.3, will be described with reference to FIGS.

  FIG. FIG. 10 is a configuration diagram illustrating a configuration of a downlink frame standardized by the 987.3 standard, and FIG. It is a block diagram which shows the structure of the upstream frame currently standardized to 987.3.

  When the XG-PON OLT 100 performs a registration process for an unregistered XG-PON ONU 200 or exchanges information with the XG-PON ONU 200, the configuration shown in FIGS. 9B and 10B Send and receive frames.

  As shown in FIGS. 9B and 10B, the payload of the PHY frame includes an XGTC header and an XGTC payload. The XGTC payload includes an XGEM payload.

  As shown in FIG. 9B, the XGTC header of the downstream frame includes PLOAM, which is information related to operation and maintenance. The PLOAM includes an ONU-ID, a message type ID, a sequence number, message content, MIC. It is included.

  As shown in FIG. 10B, the XGTC header of the upstream frame includes ONU-ID, Ind, and PLOAM, and this PLOAM includes the ONU-ID, message ID, sequence number, message content, MIC. It is included.

(A-2) Operation of Embodiment Next, the processing operation in the optical access network 1 according to this embodiment will be described in detail with reference to the drawings.

  FIG. 11 is a flowchart showing processing operations in the optical access network 1 according to the embodiment.

  In FIG. 11, XG-PON OLT 100 is G. An unregistered XG-PON ONU # 1 is discovered using the discovery method defined in 987.3, and the communication processing of steps (a) to (g) shown in FIG. 11 is performed.

  Specifically, the XG-PON OLT 100 transmits a frame including an SN (Serial Number) Grant in order to obtain a serial number of an unregistered XG-PON ONU (step (a)). In XG-PON ONU # 1, the XG-PON function unit 210 transmits a frame including a serial number request for the XG-PON ONU after a random delay (step (b)).

  Then, the XG-PON OLT 100 notifies ONX-ID = 1 to the XG-PON function unit 210 of the XG-PON ONU # 1 (step (c)), and the XG-PON function unit 210 sets ONU-ID = 1. Receive.

  At this time, in XG-PON ONU # 1, the XG-PON function unit 210 completes the registration of ONU-ID = 1 in the ONU management unit 332. Further, the XG-PON function unit 210 returns a Ranging Grant response (including a registration request with ONU-ID = 1) to the XG-PON OLT 100 for a registration request (step (d)).

  Then, the XG-PON OLT 100 performs Round trip Equalization Delay (EqD) to calculate bandwidth allocation and transmission start time, and performs notification of transmission start time (Ranging Grant) and notification of allocated bandwidth (BW Grant). (Step (e), Step (f)).

  When the XG-PON function unit 210 of the XG-PON ONU # 1 returns an ACK frame to the XG-PON OLT 100 (step (g)), the XG-PON OLT 100 sends an ONU-ID = Complete 1 registration.

  In addition, in FIG. 11, during the discovery process in steps (a) to (g), the GE-PON OLT # 1 function unit 250 of the XG-PON ONU # 1 uses the IEEE 802.3ah standardization technology discovery method. To discover unregistered unregistered GE-PON ONU # 1 and perform communication in steps (1) to (5) such as assigning LLID = 1 to complete registration of LLID = 1. .

  Specifically, the GE-PON OLT function unit 250 of XG-PON ONU # 1 notifies a transmission timing (Discovery Gate) to an unregistered GE-PON ONU (step (1)).

  At this time, since the GE-PON OLT function unit 250 functions as the GE-PON OLT in the OLT / LLID management unit 331 of the XG-PON ONU # 1, “OLT number = 1” is registered. Since GE-PON ONU # 1 is not registered, “LLID” and “ONU (GE-PON) number” are blank (unregistered).

  The GE-PON ONU # 1 returns a registration request (Register Request) to the GE-PON OLT function unit 250 after a random delay (step (2)).

  In response to this, the GE-PON OLT function unit 250 assigns LLID = 1 to the GE-PON ONU # 1, and notifies GE-PON ONU # 1 of LLID = 1 (step (3)).

  Then, the GE-PON OLT function unit 250 notifies the uplink transmission time and transmission time assigned to the GE-PON ONU # 1 by Gate (step (4)), and the GE-PON ONU # 1 receives the GE-PON OLT. Register ACK is returned to the function unit 250 (step (5)).

  When Register ACK is received, the GE-PON OLT function unit 250 registers the LLID and ONU (GE-PON) in the OLT / LLID management unit 331. That is, “OLT number = 1”, “LLID = 1”, and “ONU (GE-PON) number = 1” are registered in the OLT / LLID management unit 331 of the XG-PON ONU # 1.

  In XG-PON ONU # 1, triggered by the completion of LLID = 1 registration, the XG-PON ONU function unit 210 receives a transmission start time and transmission permission notification from the band allocation grant from the XG-PON OLT (step S1). (F)), ITU-T G. Information of LLID = 1 and OLT = 1 is transmitted to the XG-PON OLT 100 using the PLOAM area defined by the 987.3 standard (step (h)).

  At this time, in the XG-PON OLT 100, “ONU-ID = 1” assigned to the XG-PON ONU function unit 210, “LLID = 1” and “OLT number = 1” extracted from the PLOAM are associated with each other. It registers in 152.

  As a result, the XG-PON OLT 100 determines how many GE-PON ONUs (LLIDs) are under the GE-PON OLT function unit 250 of the XG-PON ONU # 1 with ONU-ID = 1. I can know.

  Further, when the XG-PON ONU # 1 is added with a plurality of GE-PON ONU function units 250 or deleted (for example, when a subscriber cancels the service and becomes unnecessary), It is possible to automatically notify and manage the XG-PON OLT 100 through the process.

  The information between the XG-PON OLT-ONU shown above is based on the information of the XGTC header / PLOAM generation unit 333 based on the information of the OLT / LLID management unit 331 and the ONU-ID management unit 332. Generate. Then, the XGTC frame generation unit 232 generates an XGTC frame and transmits it to the XG-PON OLT 100.

  The XG-PON OLT 100 detects the XGTC frame from the upstream signal from the upstream XG-PON ONU # 1, detects the XGTC header and the PLOAM area in the frame, and detects “ONU-ID”, “LLID”, “OLT number”. Is stored in the ONU management unit 152.

  For the downstream signal from the XG-PON OLT 100, the XGTC frame detection unit 242 of the XG-PON ONU # 1 detects the XGTC frame, and the XGTC header / PLOAM detection unit 334 receives the setting change information of the XGTC header and the PLOAM area from the XGTC frame. The extracted setting change information is stored in the ONU-ID management unit 332.

  Next, after completing the registration of “ONU-ID”, “LLID”, and “ONU number” in the ONU management unit 152 of the XG-PON OLT 100, the monitoring process from the remote operation system (OpS) 10 is performed. Is possible.

  When a setting change for the GE-PON ONU # 1 occurs from the remote operation system (Ops) 10, the information is stored in the monitoring control unit 151 of the XG-PON OLT 100 (step (11)).

  Information stored in the monitoring control unit 151 is given to the XGTC header / PLOAM generation unit 153. The XGTC header / PLOAM generation unit 153 inserts the setting change information into the PLOAM area, and generates an XGTC header including destination information of “ONU-ID = 1” and “LLID = 1”. Then, the XGTC frame generated by the XGTC frame generation unit 122 is generated and transmitted as a downlink signal (step (12)).

  When the downstream frame is received by XG-PON ONU # 1, the XGTC frame detects the XGTC frame. The XGTC header / PLOAM detection unit 334 detects “ONU-ID = 1” and “LLID = 1” included in the XGTC header. Then, the XGTC header / PLOAM detection unit 334 detects “OLT number = 1” and “ONU number = 1” corresponding to LLID = 1 from the OLT / LLID management unit 331, and detects the detected “OLT number = 1”. , “ONU number = 1” is given to the OAM generation unit 271 (step (13)).

  Also, the downlink frame received by XG-PON ONU # 1 is transmitted to the ITU-T G. The format is converted from the 987.3 standard specification format to the IEEE 802.3ah standard specification format (step (14)).

  Then, the OAM generation unit 271 generates an OAM frame by inserting setting change information into the OAM area with “OLT number = 1” and “ONU number = 1” from the XGTC header / PLOAM detection unit 334 as destination information. Then, it is notified by transmitting to GE-PON ONU # 1 (step (15)).

  The GE-PON ONU # 1 receives the downlink frame, and changes the setting according to the setting change information based on the setting change information included in the downlink frame.

  Although not shown in FIG. 11, GE-PON ONU # 1 uses the same method as described above to send OAM information to the GE-PON OLT function unit 250 of XG-PON OLT # 1. By transmitting the uplink frame in the reverse direction, information can be transmitted using the PLOAM area of the uplink frame to the XG-PON OLT 100.

(A-3) Effect of Embodiment As described above, according to the embodiment, as shown in FIG. 8, a function for automatically notifying and storing GE-PON ONU information to XG-PON OLT # 1 is provided. As a result, it becomes possible to monitor and control the GE-PON ONU from the XG-PON operation system (OpS), so that the operation and maintenance costs such as reduction of the GE-PON operation system (OpS) can be made economical.

(B) Other Embodiments Although various modified embodiments have been mentioned in the above-described embodiments, the present invention can also be applied to the following modified embodiments.

  (B-1) In the embodiment described above, ITU-TG. The example applied to the 987 series XG-PON has been described, but ITU-TG. It can also be applied to the 989 series NG-PON2.

DESCRIPTION OF SYMBOLS 1 ... Optical access network 1, 100 ... XG-PON OLT, 200 (200-1 to 200-M) ... XG-PON ONU, 700 (700-1 to 700-N) ... GE-PON ONU, 10 ... Operation system , 50-1 and 50-2 ... optical splitters,
DESCRIPTION OF SYMBOLS 110 ... OLT upstream frame processing part, 120 ... OLT downstream frame processing part, 130 ... 10G SNIMAC processing part, 140 ... PON optical transmission / reception part, 150 ... In-device monitoring control part, 151 ... Monitoring control part, 152 ... ONU management part, 153 ... XGTC header / PLOAM generation unit, 154 ... XGTC header / PLOAM detection unit,
210 ... XG-PON ONU function unit, 250 ... GE-PON OLT function unit, 310 ... Uplink format conversion circuit, 320 ... Downlink format conversion circuit, 330 ... In-device monitoring control unit, 331 ... OLT / LLID management unit, 332 ... ONU-ID management unit, 333... XGTC header / PLOAM generation unit, 334... XGTC header / PLOAM detection unit.

Claims (7)

In a network in which the first passive optical network system and the second passive optical network system coexist, the first slave station device constituting the first passive optical network system and the second passive optical network system constituting the second passive optical network system In an access control system for performing access control with two slave station devices,
A first master station device that employs a first passive optical network system,
Monitoring control means for performing monitoring control processing of the first slave station device and / or the second slave station device;
A first slave station information management means for managing the first identification information corresponding to said first slave station devices connected with the first master station,
And a first master station processing means for processing the first control frame that is exchanged between the first slave station,
The first slave station device is
Slave station processing means for processing the first control frame exchanged with the first master station device;
Assigned from the first master station, and the second slave station information management means for managing the first identification information,
1 or more can be connected to the second slave station apparatus, which performs processing of the second control frame between the connected each second slave stations, each of the second One or a plurality of second master station processing means for acquiring second identification information corresponding to the slave station device;
And third slave station information management means for managing the third identification information corresponding to each of the second master station processing means and the second identification information in association with each other,
The Noriko Ue station processing means, said third identification information and the second identification information, and inserted in a specific area of the first control frame and transmitted to the first master station,
The upper Symbol first slave station information management means, included in the first control frame the first slave station apparatus or et received, the third identification information and the second identification information, An access control system, characterized by being managed in association with the first identification information of the corresponding first slave station device. The first control frame is exchanged in a first registration process performed between the first master station device and the first slave station device,
The second control frame is exchanged in a second registration process performed between each of the second master station processing means and the second slave station device,
When the second registration processing is completed, the slave station processing means inserts the first identification information into which the third identification information and the second identification information determined in the second registration processing are inserted. A control frame is transmitted to the first master station device
The access control system according to claim 1. The first master station device is
From the monitoring terminal which is connected the monitor control means, obtains the operation and maintenance information for the second slave station,
The first master station processing means is
Based on the second identification information, and said corresponding first identification information and a corresponding said third identification information, retrieves from the first slave station information management means,
Retrieved, and the first identification information that corresponds to the destination information including the corresponding said third identification information, and transmits the first control frame including the operation and maintenance information The access control system according to claim 1 or 2 , wherein The first passive optical network system is ITU-T G.264. 987.3 standard passive optical network system, the second passive optical network system is IEEE 802.3ah standard passive optical network system,
Slave station processing means of each of the first slave station devices, the PLOAM field, the third identification information of each master station processing means as the identification information, the second slave station as the second identification information The LLID of the device is transmitted as the first identification information to the slave station identification information , and the inserted first control frame is transmitted to the first master station device. An access control system according to the above. In a network in which the first passive optical network system and the second passive optical network system coexist, the first slave station device constituting the first passive optical network system and the second passive optical network system constituting the second passive optical network system In an access control method for performing access control with two slave station devices,
The first master station apparatus that employs the first passive optical network system is :
The supervisory control processing means performs supervisory control processing of the first slave station device and / or the second slave station device,
The first master station processing means performs a processing of the first control frame that is exchanged between the first slave station,
A first slave station information management unit manages the first identification information corresponding to said first slave station devices connected with the first master station,
The first slave station device is
Child station processing means performs processing of the first control frame that is exchanged between the first master station,
A second slave station information management means, allocated from the first master station apparatus, and managing the first identification information,
Each one or more second master station processing means being connectable 1 or a plurality of said second slave station, a second between each second slave station devices connected Process the control frame , obtain second identification information corresponding to each of the second slave station devices,
Third slave station information management means manages the third identification information corresponding to each of the second master station processing means and the second identification information in association with each other,
The Noriko Ue station processing means, said third identification information and the second identification information, and inserted in a specific area of the first control frame and transmitted to the first master station,
The upper Symbol first slave station information management means, included in the first control frame the first slave station apparatus or et received, the third identification information and the second identification information, An access control method, comprising: managing in association with the first identification information of the corresponding first slave station device. In a master station apparatus that employs the first passive optical network system in a network in which the first passive optical network system and the second passive optical network system are mixed,
The first slave station apparatus constituting the first passive optical network system, and or, the monitoring control means for monitoring the control process of the second slave station apparatus constituting the second passive optical network system,
A first slave station information management means for managing the first identification information corresponding to said first slave station devices connected with those parent station,
And a first master station processing means for processing the first control frame that is exchanged between the first slave station,
The said first slave station information management means, the included in the first control frame received from the first slave station apparatus, corresponding to the second master station processing means of the first slave station 3 and the second identification information corresponding to the second slave station device are managed in association with the first identification information of the corresponding first slave station device. Station equipment. In the slave station apparatus adopting the first passive optical network system in a network in which the first passive optical network system and the second passive optical network system are mixed,
Slave station processing means for processing the first control frame exchanged with the first master station device of the first passive optical network system;
Assigned from the first master station, and the second slave station information management means for managing the identification information corresponding to said first slave station,
It can be connected one or more of the second slave station apparatus constituting the second passive optical network system, the processing of the second control frame between said respective second slave station devices connected One or a plurality of second master station processing means for obtaining second identification information corresponding to each of the second slave station devices,
And third slave station information management means for managing the third identification information corresponding to each of the second master station processing means and the second identification information in association with each other,
The said child station processing means, said third identification information and the second identification information, and inserted in a specific area of the first control frame, is transmitted to the first master station A slave station device characterized by.

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