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WO2015074275A1 - Terminal de ligne optique, unité point de desserte, système et procédé de planification de flux de données - Google Patents

Terminal de ligne optique, unité point de desserte, système et procédé de planification de flux de données Download PDF

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Publication number
WO2015074275A1
WO2015074275A1 PCT/CN2013/087778 CN2013087778W WO2015074275A1 WO 2015074275 A1 WO2015074275 A1 WO 2015074275A1 CN 2013087778 W CN2013087778 W CN 2013087778W WO 2015074275 A1 WO2015074275 A1 WO 2015074275A1
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WO
WIPO (PCT)
Prior art keywords
dpu
queue
data stream
olt
data flow
Prior art date
Application number
PCT/CN2013/087778
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English (en)
Chinese (zh)
Inventor
隋猛
石操
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/087778 priority Critical patent/WO2015074275A1/fr
Priority to CN201380003072.5A priority patent/CN104956633B/zh
Publication of WO2015074275A1 publication Critical patent/WO2015074275A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0064—Arbitration, scheduling or medium access control aspects

Definitions

  • the present invention relates to optical fiber communication technologies, and in particular, to an optical line terminal, a distribution point unit, a system, and a data flow scheduling method. Background technique
  • Passive Optical Network (PON) technology is a point-to-multipoint optical access technology. It consists of optical line terminals (OLTs) on the central side and optical network units on the user side. Optical Network Unit (ONU) or Optical Network Terminal (ONT) and Optical Distribution Network (ODN).
  • ONT optical line terminals
  • ONU Optical Network Unit
  • ONT Optical Network Terminal
  • ODN Optical Distribution Network
  • the so-called “passive” means that the ODN does not contain any active electronic devices and electronic power supplies, all of which are composed of passive components such as splitters, so the cost of management and maintenance is low.
  • the Fiber To The Distribution Point (FTTd) distribution point (DP) to the Customer Premises (CP) device is non-fiber, such as twisted pair, coaxial Cables, power lines, etc.; devices on the DP side are the Distributed Point Units (DPUs).
  • DPUs Distributed Point Units
  • FIG. 1 is a schematic diagram of data flow scheduling in the prior art.
  • CPE Customer Premises Equipment
  • Office abbreviated as CO
  • the data of the buffer queues of multiple CPEs in the same packet are scheduled and forwarded to the packet queue of the packet; the data stream data in the packet queue is modulated and sent to the CPE.
  • the CPE demodulates the data stream, it filters out the corresponding data stream according to its own ID.
  • Embodiments of the present invention provide an optical line terminal, a distribution point unit, a system, and a data flow scheduling method, to overcome the problems of high cost and high power consumption of the DPU in the prior art.
  • the first aspect of the present invention provides an optical line terminal OLT, including:
  • a receiving module a scheduling module, and a sending module
  • the receiving module is configured to receive a data stream that is sent from the network side to the plurality of customer premises equipment CPEs, and store the data stream in a plurality of buffer queues corresponding to the CPE;
  • the scheduling module is connected to the receiving module, and configured to schedule, according to the packet information of the CPE, the data flows in the buffer queue corresponding to the CPEs belonging to the same group into the same data flow queue;
  • the sending module is connected to the scheduling module, and configured to send the data stream in the data stream queue to the DPU through a data stream connection established with the distribution point unit DPU.
  • the receiving module is further configured to: receive the group information reported by the DPU, where the group information is when the DPU is started or Reported when the group information changes.
  • the sending module is further configured to:
  • mapping information of the data flow queue to the packet queue is sent to the DPU; wherein the packet queue is a queue in the DPU that stores the data flow in the data flow queue.
  • an embodiment of the present invention provides a distribution point unit DPU, including:
  • a receiving module a processing module, and a sending module
  • the receiving module is connected to the processing module, and configured to receive, by using a data stream connection established with the optical line terminal OLT, the data stream sent by the OLT; the data stream is sent from the network side to multiple user premises equipments. a set of data flows of the CPE; wherein, the plurality of CPEs belong to the same group according to the group information of the CPE;
  • the processing module is configured to store the data stream sent by the OLT into a packet queue, where the packet queue has a one-to-one correspondence with the data stream queue;
  • the sending module is connected to the processing module and configured to send a data stream stored in the packet queue.
  • the receiving module is further configured to:
  • the sending module is further configured to:
  • the packet information is sent to the OLT.
  • an embodiment of the present invention provides a passive optical network system, including:
  • optical line terminal OLT according to any of the first aspect, the first and second possible implementations of the first aspect, and the at least one first and second possible implementations of the second aspect, the second aspect A distribution point unit DPU as described in any of the above.
  • an embodiment of the present invention provides a data flow scheduling method, including:
  • the data stream in the data stream queue is sent to the DPU through a data stream connection established with the distribution point unit DPU.
  • the method further includes:
  • the method further includes:
  • mapping information of the data flow queue to the packet queue is sent to the DPU; wherein the packet queue is a queue in the DPU that stores the data flow in the data flow queue.
  • an embodiment of the present invention provides a data flow scheduling method, including:
  • the data stream is a set of data streams sent from the network side to the plurality of customer premises equipment CPEs; wherein, the multiple CPEs are based on The group information of the CPE belongs to the same group;
  • the Before the sent data stream is stored in a packet queue it also includes:
  • the method further includes:
  • the packet information is sent to the OLT.
  • an embodiment of the present invention provides an optical line terminal device, including:
  • the memory storing execution instructions, when the optical line terminal device is in operation, the processor is in communication with the memory, the processor executing the execution instruction to cause the optical line terminal device.
  • an embodiment of the present invention provides a device for allocating a point unit, including:
  • the memory storing execution instructions, when the distribution point unit device is in operation, the processor is in communication with the memory, the processor executing the execution instruction such that the distribution point unit device.
  • the optical line terminal, the distribution point unit, the system, and the data flow scheduling method of the embodiment of the present invention receive, by the OLT, a data stream sent from the network side to the plurality of customer premises equipment CPE, and store the data stream in the plurality of Configuring a buffer queue corresponding to the CPE, and scheduling data streams in the buffer queue corresponding to the CPE belonging to the same group to the same data flow queue according to the packet information of the CPE, where the data flow queue is
  • the data stream is sent to the DPU through a data stream connection established with the distribution point unit DPU, and the DPU stores the received data stream in a packet queue corresponding to the data stream queue, wherein the packet queue and the data
  • the flow queues are in one-to-one correspondence, and finally the DPU sends the data stream stored in the packet queue to each CPE, and the scheduling function in the DPU is transferred to the OLT, which reduces the complexity and power consumption of the DPU, and reduces the buffering requirement of the DPU.
  • FIG. 1 is a schematic diagram of data flow scheduling in the prior art
  • FIG. 2 is a topological structure of an FTTdp system according to an embodiment of the present invention.
  • Embodiment 1 of an optical line terminal OLT according to the present invention is a schematic structural diagram of Embodiment 1 of an optical line terminal OLT according to the present invention.
  • FIG. 4 is a schematic diagram of data flow scheduling according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of Embodiment 1 of a distribution point unit DPU according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a fiber-to-distribution point FTTdp system according to the present invention.
  • Embodiment 7 is a flowchart of Embodiment 1 of a data flow scheduling method according to the present invention.
  • Embodiment 8 is a flowchart of Embodiment 2 of a data flow scheduling method according to the present invention.
  • Embodiment 9 is a schematic structural diagram of Embodiment 1 of an optical line terminal device according to the present invention.
  • FIG. 10 is a schematic structural diagram of Embodiment 1 of a distribution point unit device according to the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • FIG. 2 is a topological structure of an FTTdp system according to an embodiment of the present invention.
  • the embodiment of the present invention can be applied to the FTTdp.
  • the topological features of the present invention are as follows:
  • the optical interface between the OLT and the DPU on the central office is PON (including GPON, EPON, 10GGPON, 10GEPON, etc.).
  • the device between the DPU and the CPE is a non-fiber connection, which can be a copper wire, a twisted pair cable, a coaxial cable, a power line, etc., and a P2MP connection between the DPU and the CPE, and the uplink and downlink multiplexing modes are all TDMA.
  • FIG. 3 is a schematic structural diagram of Embodiment 1 of an optical line terminal OLT according to the present invention.
  • FIG. 4 is a schematic diagram of data flow scheduling according to an embodiment of the present invention.
  • the executor of this embodiment is an optical line terminal OLT on the office side, and the OLT can be implemented by software and/or hardware.
  • the solution of this embodiment is applied in the FTTdp system. As shown in FIG.
  • the optical line terminal OLT 30 of this embodiment may include: a receiving module 301, scheduling The module 302 and the sending module 303 are configured to receive the data stream sent from the network side to the plurality of customer premises equipment CPEs, and store the data stream in a plurality of buffer queues corresponding to the CPE; And the receiving module 301 is configured to schedule, according to the group information of the CPE, the data stream in the buffer queue corresponding to the CPE belonging to the same group to be in the same data stream queue; the sending module 303 is connected to the scheduling module 302, and is configured to The data stream in the flow queue is sent to the DPU through a data stream connection established with the distribution point unit DPU.
  • the receiving module 301 of the OLT receives the data streams corresponding to the multiple CPEs and stores them in multiple buffer queues corresponding to the CPEs.
  • the scheduling module 302 schedules the data streams in the buffer queue corresponding to the CPEs of the CPE belonging to the same group to the same data stream queue according to the group information of the CPE.
  • the number of packets may be multiple, and each packet corresponds to one data stream queue.
  • the sending module 303 sends the data stream in the data stream queue to the DPU through a data stream connection established with the distribution point unit DPU, so that the DPU stores the received data stream in a packet queue corresponding to the data stream queue.
  • the packet queue has a one-to-one correspondence with the data flow queue.
  • Different PON networks have different data stream connections, such as GPON for GEM connection, 10G-GPON for XGEM, Ethernet Passive Optical Network (EPON), and lOG-EPON for logical link identifier (Logical Link).
  • Identifier referred to as LLID
  • VLAN Virtual Local Area Network
  • the receiving module 301 is further configured to: receive the group information reported by the DPU, where the group information is reported when the DPU is started or the group information is changed.
  • the receiving module 301 receives the packet information of the CPE reported by the DPU, and the scheduling module 302 schedules the data streams of the multiple CPEs according to the grouping information of the CPE, and schedules the data streams of the CPEs of the same group into the same data stream queue.
  • the sending module 303 is further configured to:
  • mapping information of the data flow queue to the packet queue is sent to the DPU; wherein, the packet queue is a queue for storing the data flow in the data flow queue in the DPU.
  • the sending module 303 of the OLT sends the mapping information of the data stream queue to the packet queue to the DPU, and the DPU stores the data stream of the received data stream queue into the packet queue corresponding to the data stream queue according to the mapping information.
  • the data stream sent from the network side to the plurality of customer premises equipment CPEs is received by the OLT, and the data stream is stored in a plurality of buffer queues corresponding to the CPE, and the group information according to the CPE will belong to the same
  • the data flow in the buffer queue corresponding to the packetized CPE is scheduled to the same
  • the data flow in the data flow queue is sent to the DPU through a data flow connection established with the distribution point unit DPU, and the scheduling function in the DPU is transferred to the OLT, thereby reducing the complexity and work of the DPU. It consumes and reduces the buffering requirement of the DPU and the number of data stream connections between the OLT and the DPU, and solves the problem of high cost and high power consumption of the DPU in the prior art.
  • FIG. 5 is a schematic structural diagram of Embodiment 1 of a distribution point unit DPU according to the present invention.
  • the execution body of this embodiment is a distribution point unit DPU, which can be implemented by software and/or hardware.
  • the solution of this embodiment is applied in the FTTdp system.
  • the distribution point unit DPU50 of the present embodiment may include: a receiving module 501, a processing module 502, and a sending module 503.
  • the receiving module 501 is connected to the processing module 502 for establishing with the optical line terminal OLT.
  • the data stream is connected to the data stream sent by the OLT; the data stream is a set of data streams sent from the network side to the plurality of customer premises equipment CPEs; wherein, the plurality of CPEs belong to the same group according to the group information of the CPE;
  • the processing module 502 is configured to store the data stream sent by the OLT into a packet queue; wherein, the group queue has a one-to-one correspondence with the data stream queue;
  • the sending module 503 is connected to the processing module 502 for transmitting the data stream stored in the packet queue.
  • the receiving module 501 of the DPU receives the data stream sent by the OLT, and the processing module 502 stores the data stream sent by the OLT into a packet queue, where the data stream is sent from the network side to multiple A collection of data streams for the same grouped CPE.
  • the existing DPU as shown in FIG. 1, has a buffer queue for storing data streams for each CPE, and needs to schedule data streams of multiple CPEs into the packet queue, which has high cost and large power consumption.
  • the sending module 503 processes the data stream in the packet queue and processes it to each CPE.
  • the receiving module 501 is further configured to:
  • the received data stream is stored in a corresponding packet queue according to the mapping information of the received data stream queue to the packet queue.
  • the sending module 503 is further configured to:
  • the packet information is sent to the OLT.
  • the CPE packet information is sent to the OLT, so that the OLT schedules the data flows of the multiple CPEs according to the packet information.
  • the DPU receives the data stream sent by the OLT through a data stream connection established with the optical line terminal OLT; the data stream is a set of data streams sent from the network side to the multiple CPEs, where the multiple CPEs are grouped according to the CPE group information. Is belonging to the same group, and stores the data stream sent by the OLT. Go to a packet queue, where the packet queue is in one-to-one correspondence with the data flow queue, and the data stream stored in the packet queue is sent to each CPE, and the scheduling function in the DPU is transferred to the 0LT, thereby reducing the complexity of the DPU and The power consumption is reduced, and the buffering requirement of the DPU is reduced.
  • FIG. 6 is a schematic structural diagram of an embodiment of a fiber-to-distribution point FTTdp system according to the present invention.
  • the system of this embodiment may include: any optical line terminal OLT30 and at least one distribution point unit in the optical line terminal OLT embodiment. Any of the distribution point units DPU50 in the DPU embodiment.
  • the protocol in the FTTdp of this embodiment may be, for example, any TDM PON protocol such as GPON, 10G-GPON, EPON or 10G-EPON.
  • FIG. 7 is a flowchart of Embodiment 1 of a data flow scheduling method according to the present invention.
  • the execution body of this embodiment is an optical line terminal OLT on the office side, and the OLT can be implemented by software and/or hardware.
  • the solution of this embodiment is applied in the FTTdp system. As shown in FIG. 7, the method in this embodiment may include:
  • Step 701 Receive a data flow sent from a network side to a plurality of customer premises equipment CPEs, and store the data flow in a plurality of buffer queues corresponding to the CPE.
  • Step 702 Schedule, according to the group information of the CPE, the data streams in the buffer queue corresponding to the CPEs belonging to the same group to be in the same data stream queue.
  • Step 703 Send the data stream in the data flow queue to the DPU through a data stream connection established with the distribution point unit DPU.
  • the method in this embodiment may further include:
  • the packet information reported by the DPU is received, and the packet information is reported when the DPU is started or the packet information is changed.
  • the method in this embodiment may further include:
  • mapping information of the data flow queue to the packet queue is sent to the DPU.
  • FIG. 8 is a flowchart of Embodiment 2 of a data flow scheduling method according to the present invention.
  • the execution body of this embodiment is a distribution point unit DPU, and the DPU can be implemented by software and/or hardware.
  • the solution of this embodiment is applied to the FTTdp system. As shown in FIG. 8, the method in this embodiment may include:
  • Step 801 Receive a number sent by the OLT through a data flow connection established with the optical line terminal OLT.
  • the data stream is a set of data streams sent from the network side to the plurality of customer premises equipment CPEs; wherein, the plurality of CPEs belong to the same group according to the group information of the CPE.
  • Step 902 Store the data stream sent by the OLT into a packet queue.
  • the packet queue has a one-to-one correspondence with the data stream queue.
  • Step 903 Send a data stream stored in a packet queue.
  • the method before storing the data stream sent by the OLT into a packet queue, the method further includes: receiving mapping information of the data flow queue sent by the OLT to the packet queue.
  • the method in this embodiment may further include:
  • the packet information is sent to the OLT.
  • FIG. 9 is a schematic structural diagram of Embodiment 1 of an optical line terminal device according to the present invention.
  • the optical line terminal device 90 provided in this embodiment includes a processor 901 and a memory 902.
  • Optical line termination device 90 may also include a transmitter 903, a receiver 904.
  • Transmitter 903 and receiver 904 can be coupled to processor 901.
  • the transmitter 903 is configured to transmit data or information
  • the receiver 904 is configured to receive data or information
  • the memory 902 stores execution instructions.
  • the processor 901 communicates with the memory 902, and the processor 901
  • the execution instructions in the memory 902 are used to execute the technical solution of the method embodiment shown in FIG. 7.
  • the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of Embodiment 1 of a distribution point unit device according to the present invention.
  • the distribution point unit device 100 provided in this embodiment includes a processor 1001 and a memory 1002.
  • the distribution point unit device 100 may further include a transmitter 1003 and a receiver 1004.
  • Transmitter 1003 and receiver 1004 can be coupled to processor 1001.
  • the transmitter 1003 is configured to transmit data or information
  • the receiver 1004 is configured to receive data or information
  • the memory 1002 stores execution instructions.
  • the processor 1001 communicates with the memory 1002.
  • the processor 1001 The execution instructions in the memory 1002 are used to perform the technical solution of the method embodiment shown in FIG. 8.
  • the implementation principle and technical effects are similar, and details are not described herein again.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are only schematic.
  • the division of the unit or module is only a logical function division.
  • there may be another division manner for example, multiple units or modules may be used. Combine or can be integrated into another system System, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or module, and may be electrical, mechanical or otherwise.
  • the modules described as separate components may or may not be physically separate.
  • the components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Communication System (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un terminal de ligne optique, une unité point de desserte, un système et un procédé de planification de flux de données. Le terminal de ligne optique (OLT) selon la présente invention comporte : un module de réception, un module de planification et un module d'envoi, le module de réception étant destiné à recevoir un flux de données envoyé à une pluralité d'équipements de locaux client (CPE) à partir d'un côté client, et à mémoriser le flux de donnés dans une pluralité de files d'attente tampon correspondant au CPE. Le module de planification est connecté au module de réception et est destiné à planifier les flux de données dans la pluralité de files d'attente tampon correspondant au CPE dans le même groupe que la même file d'attente de flux de données selon les informations de regroupement sur les CPE; et le module d'envoi est destiné à envoyer un flux de données dans une file d'attente de flux de données à une unité point de desserte (DPU) par l'intermédiaire d'un flux de données établi avec le DPU. Les modes de réalisation de la présente invention réduisent la complexité et la consommation d'énergie d'un DPU, ainsi que les exigences de tampon du DPU et le nombre de connexions de flux de données entre un OLT et un DPU.
PCT/CN2013/087778 2013-11-25 2013-11-25 Terminal de ligne optique, unité point de desserte, système et procédé de planification de flux de données WO2015074275A1 (fr)

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PCT/CN2013/087778 WO2015074275A1 (fr) 2013-11-25 2013-11-25 Terminal de ligne optique, unité point de desserte, système et procédé de planification de flux de données
CN201380003072.5A CN104956633B (zh) 2013-11-25 2013-11-25 光线路终端、分配点单元、系统及数据流调度方法

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