WO2023101074A1 - Dispositif et procédé de gestion automatique d'une feuille de numéro de ligne d'un système de communication mobile sur la base de fronthaul à multiplexage par répartition en longueur d'onde (wdm) passif - Google Patents

Dispositif et procédé de gestion automatique d'une feuille de numéro de ligne d'un système de communication mobile sur la base de fronthaul à multiplexage par répartition en longueur d'onde (wdm) passif Download PDF

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Publication number
WO2023101074A1
WO2023101074A1 PCT/KR2021/018360 KR2021018360W WO2023101074A1 WO 2023101074 A1 WO2023101074 A1 WO 2023101074A1 KR 2021018360 W KR2021018360 W KR 2021018360W WO 2023101074 A1 WO2023101074 A1 WO 2023101074A1
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WIPO (PCT)
Prior art keywords
information
fronthaul
unit
base station
mobile communication
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PCT/KR2021/018360
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English (en)
Korean (ko)
Inventor
이종민
임훈
정소연
이진욱
김상우
이선익
송명훈
조범근
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주식회사 에치에프알
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Publication of WO2023101074A1 publication Critical patent/WO2023101074A1/fr

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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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles

Definitions

  • the present invention relates to an apparatus and method for automatically managing a prefix in a passive WDM fronthaul-based mobile communication system, and more particularly, to an apparatus and method for managing a prefix in a mobile communication system.
  • an access network numbering book is a document for allocating and managing numbers for lines, and refers to a document for managing line usage details for a path connected between the start port and end point port of a line.
  • the viewpoint port represents a port of a digital unit (DU), which is a mobile communication base station.
  • a path represents a line of wavelength division multiplexing (WDM) provided by a fronthaul device.
  • the endpoint port represents a port of a radio unit (RU), which is a mobile communication base station.
  • An object to be achieved by the present invention is an access network that connects a digital unit (DU) and a radio unit (RU) based on a fronthaul device based on passive wavelength division multiplexing (WDM) It is an object of the present invention to provide an apparatus and method for automatically managing a serial number in a passive WDM fronthaul-based mobile communication system that automatically creates and updates a serial number of a mobile communication system including a network and automatically manages the serial number.
  • DU digital unit
  • RU radio unit
  • WDM passive wavelength division multiplexing
  • an apparatus for automatically managing line number of a passive WDM fronthaul-based mobile communication system is based on a passive wavelength division multiplexing (WDM)-based fronthaul device.
  • An apparatus for automatically managing the number of entries in a mobile communication system including an access network connecting a digital unit (DU) and a radio unit (RU), comprising: an optical signal obtaining unit acquiring an optical signal transmitted and received between the radio units (RU); a monitoring unit that obtains fronthaul monitoring information based on the optical signal obtained through the optical signal acquisition unit using interface standard information between the digital unit (DU) and the radio unit (RU); a monitoring management unit that obtains fronthaul line number information based on the fronthaul monitoring information acquired through the monitoring unit; a base station management unit acquiring base station number information based on data obtained from the digital unit (DU); and a control unit for acquiring access network number information based on the fronthaul number information obtained through the monitoring and management unit and the base station number information obtained through the
  • the optical signal acquisition unit includes a plurality of optical signal acquisition modules installed on each of the optical transmission lines between the fronthaul device and the digital unit (DU), and the optical transmission lines are provided through the plurality of optical signal acquisition modules.
  • the optical signals transmitted and received in each may be obtained.
  • the monitoring unit separates the optical signal into a plurality of signals, selects one signal from the plurality of signals, amplifies the one signal, and demultiplexes the amplified one signal (DFDM), the process of separating by wavelength, the process of selecting a signal of one wavelength representing one line from the one signal separated by wavelength, the process of converting the signal of the one wavelength into an electrical signal, the By performing a process of measuring optical power of a signal for one wavelength and a process of obtaining line information for the one wavelength based on the electrical signal, the circuit information including the line information for each of a plurality of lines is performed. Fronthaul monitoring information can be obtained.
  • the line information may include radio unit (RU) specific information, digital unit (DU) specific information, downlink optical power information, uplink optical power information, and signal frame analysis information.
  • RU radio unit
  • DU digital unit
  • the monitoring management unit may obtain the fronthaul line number information for each fronthaul device based on the fronthaul monitoring information including the line information for each of a plurality of lines.
  • the fronthaul line number information includes fronthaul device identification information, fronthaul device name information, radio unit (RU) unique information, radio unit (RU) identification information, radio unit (RU) slot information, radio unit (RU) It may include port information, digital unit (DU) unique information, digital unit (DU) identification information, digital unit (DU) slot information, digital unit (DU) port information, wavelength information, and distribution box identification information.
  • the base station management unit may obtain the base station selection information for each base station based on data acquired from each of the digital units (DUs).
  • the base station selection information may include base station unique information, base station identification information, and base station distance information.
  • control unit obtains the access network number information consisting of radio unit (RU) number information, fronthaul device number information, and digital unit (DU) number information based on the fronthaul number information and the base station number information.
  • RU radio unit
  • DU digital unit
  • it may further include an information provider for providing the access network selection information to the external terminal upon request from the external terminal.
  • a method for automatically managing line number of a passive WDM fronthaul-based mobile communication system is based on a passive WDM (wavelength division multiplexing)-based fronthaul device
  • a method for automatically managing a serial number performed by a device for automatically managing a serial number in a mobile communication system including an access network connecting a digital unit (DU) and a radio unit (RU)
  • the optical signals transmitted and received in each of the optical transmission lines are obtained through a plurality of optical signal acquisition modules installed in each of the optical transmission lines between the fronthaul device and the digital unit (DU).
  • the step of obtaining fronthaul monitoring information includes the process of separating the optical signal into a plurality of signals, the process of selecting one signal from the plurality of signals, the process of amplifying the one signal, and the process of amplifying the one signal.
  • Demultiplexing (DFDM) signals to separate them by wavelength, selecting a signal of one wavelength representing one line from the one signal separated by wavelength, converting the signal of the one wavelength into an electrical signal
  • the process of converting, measuring the optical power of a signal for the one wavelength, and obtaining line information for the one wavelength based on the electrical signal is performed to obtain the line information for each of a plurality of lines. and acquiring the fronthaul monitoring information including information.
  • the obtaining fronthaul line number information may include obtaining the fronthaul line number information for each of the fronthaul devices based on the fronthaul monitoring information including the line information for each of a plurality of lines. .
  • the obtaining base station number information may include obtaining base station number information for each base station based on data obtained from each of the digital units (DUs).
  • the step of obtaining the access network number information includes the radio unit (RU) number information, fronthaul device number information, and digital unit (DU) number information based on the fronthaul number information and the base station number information. It may consist of acquiring access network line number information.
  • the method may further include providing the access network selection information to the external terminal at the request of the external terminal.
  • a computer program according to a preferred embodiment of the present invention for achieving the above technical problem is stored in a computer-readable recording medium, and any one of the above-mentioned passive WDM fronthaul-based mobile communication system's automatic management method is applied to a computer. run in
  • a digital unit based on a passive wavelength division multiplexing (WDM)-based fronthaul device , DU) and a radio unit (radio unit, RU) by automatically creating and updating the numbering book of the mobile communication system including the access network, and automatically managing the numbering book, in case of failure or operation It is possible to obtain line information more efficiently.
  • WDM wavelength division multiplexing
  • FIG. 1 is a block diagram for explaining an apparatus for automatically managing a prefix in a passive WDM fronthaul-based mobile communication system according to a preferred embodiment of the present invention.
  • FIG. 2 is a block diagram for explaining the detailed configuration of the device for automatically managing line numbering shown in FIG. 1. Referring to FIG.
  • FIG. 3 is a diagram for explaining an operation of automatically managing a line number book according to a preferred embodiment of the present invention.
  • FIG. 4 is a flowchart illustrating a method for automatically managing a forwarding number in a passive WDM fronthaul-based mobile communication system according to a preferred embodiment of the present invention.
  • first and second are used to distinguish one component from another component, and the scope of rights should not be limited by these terms.
  • a first element may be termed a second element, and similarly, a second element may be termed a first element.
  • identification codes eg, a, b, c, etc.
  • identification codes do not describe the order of each step, and each step is clearly Unless a specific order is specified, it may occur in a different order from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.
  • ' ⁇ unit' means software or a hardware component such as a field-programmable gate array (FPGA) or ASIC, and ' ⁇ unit' performs certain roles.
  • ' ⁇ part' is not limited to software or hardware.
  • ' ⁇ bu' may be configured to be in an addressable storage medium and may be configured to reproduce one or more processors. Therefore, as an example, ' ⁇ unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data structures and variables. Functions provided within components and ' ⁇ units' may be combined into smaller numbers of components and ' ⁇ units' or further separated into additional components and ' ⁇ units'.
  • FIG. 1 is a block diagram for explaining an apparatus for automatically managing a prefix in a passive WDM fronthaul-based mobile communication system according to a preferred embodiment of the present invention.
  • a passive WDM fronthaul-based mobile communication system automatically manages a serial number (hereinafter referred to as a 'automatic serial number management apparatus') 100 for passive wavelength division multiplexing (WDM).
  • a serial number hereinafter referred to as a 'automatic serial number management apparatus'
  • WDM wavelength division multiplexing
  • DU digital unit
  • RU radio unit
  • a base station is generally divided into a digital unit (DU) 210 and a radio unit (RU) 230 and installed at a distance. are applying
  • a plurality of radio units (RU) 230 are connected to one digital unit (DU) 210 as digital units (DU) 210 are centralized in one place.
  • a WDM fronthaul device 220 is used between the digital unit (DU) 210 and the radio unit (RU) 230, and the fronthaul device (220), optical line redundancy method is applied to stabilize operation.
  • the construction using a passive optical element that is easy to install and has fewer obstacles and defects is gradually expanding.
  • this passive WDM-based fronthaul device 220 cannot provide any information about the line, so that the fronthaul operator recognizes
  • FIGS. 2 and 3 an apparatus for automatically managing a forwarding number of a passive WDM fronthaul-based mobile communication system according to a preferred embodiment of the present invention will be described in detail.
  • FIG. 2 is a block diagram for explaining the detailed configuration of the device for automatically managing a prefix shown in FIG. 1
  • FIG. 3 is a diagram for explaining an operation for automatically managing a prefix according to a preferred embodiment of the present invention.
  • the automatic serial number management device 100 includes an optical signal acquisition unit 110, a monitoring unit 120, a monitoring and management unit 130, a base station management unit 140, a control unit 150, information A provision unit 160 and a storage unit 170 may be included.
  • the optical signal acquisition unit 110 may obtain an optical signal transmitted and received between a digital unit (DU) 210 and a radio unit (RU) 230 .
  • DU digital unit
  • RU radio unit
  • the optical signal refers to a downlink optical signal or an uplink optical signal multiplexed by the fronthaul device 220 .
  • the optical signal acquisition unit 110 includes a plurality of optical signal acquisition modules 111 installed on each optical transmission line between the fronthaul device 220 and the digital unit (DU) 210, and includes a plurality of optical signal acquisition modules 111.
  • Optical signals transmitted and received in each optical transmission line may be obtained through the acquisition module 111 .
  • the optical signal acquisition module 111 may be implemented as an optical coupler or the like.
  • the optical signal acquisition unit 110 may provide the optical signal obtained from each optical transmission line to the monitoring unit 120 .
  • the monitoring unit 120 monitors the front haul based on the optical signal obtained through the optical signal acquisition unit 110 using the interface specification information between the digital unit (DU) 210 and the radio unit (RU) 230. information can be obtained.
  • the interface specification information refers to a communication protocol to be followed when the digital unit (DU) 210 and the radio unit (RU) exchange data with each other.
  • the monitoring unit 120 separates the optical signal into a plurality of signals, selects one signal from the plurality of signals, amplifies the selected signal, and demultiplexes the amplified signal (DFDM). ), the process of separating by wavelength, the process of selecting a signal for one wavelength representing one line from one signal separated by wavelength, the process of converting the signal for one selected wavelength into an electrical signal, the process of converting the selected one
  • fronthaul monitoring information including line information for each of a plurality of lines is obtained. can be obtained
  • the line information may include radio unit (RU) specific information, digital unit (DU) specific information, downlink optical power information, uplink optical power information, and signal frame analysis information.
  • the signal frame analysis information refers to information extracted from an electrical signal based on interface standard information.
  • a digital unit (DU) 210 and a radio unit (RU) 230 which are base stations of the mobile communication system 200, have unique information distinguishable from other base stations.
  • This is referred to as base station-specific information (or original base station-specific information), and can be made in various forms.
  • the MAC address is basically a worldwide unique code, and both the digital unit (DU) 210 and the radio unit (RU) 230 have it.
  • the serial number of the radio unit (RU) 230 may also be used as unique information.
  • a base station ID and base station name assigned differently according to the mobile communication base station management standard may also be used as unique information.
  • a special tag may be assigned and used for the purpose of using it as unique information rather than already used information.
  • This base station specific information is transmitted between the digital unit (DU) 210 and the radio unit (RU) 230 as part of an interface for communication between the digital unit (DU) 210 and the radio unit (RU) 230 .
  • the fronthaul device 220 has a basic purpose of relaying the digital unit (DU) 210 and the radio unit (RU) 230, and the digital unit (DU) 210-radio unit (RU) 230 It relays according to the same standard as the interface standard for communication between the terminals.
  • the monitoring unit 120 may perform an operation of converting an optical signal into a digital signal and reconstructing the converted digital signal into a frame according to interface standards.
  • the monitoring unit 120 configures a signal of a digital unit (DU) 210 or a signal of a radio unit (RU) 230 into a frame, and then finds and obtains base station-specific information.
  • the monitoring unit 120 may obtain base station-specific information by finding and reading a MAC address.
  • the monitoring unit 120 collects control words from a basic frame structure and reads information contained in a control and management channel (C&M channel) to obtain base station-specific information.
  • C&M channel control and management channel
  • a tag method is a method negotiated with a base station manufacturer and can obtain base station-specific information by reading a tag at a specific agreed position among control words.
  • the monitoring unit 120 may provide fronthaul monitoring information including line information for each of a plurality of lines to the monitoring management unit 130 .
  • the monitoring management unit 130 may obtain fronthaul line number information based on the fronthaul monitoring information acquired through the monitoring unit 120 .
  • the fronthaul line number information is fronthaul device identification information such as fronthaul device ID, fronthaul device name information, radio unit (RU) unique information, radio unit (RU) ID, radio unit ( such as radio unit (RU)) Digital unit (DU) identification, such as RU) identification information, radio unit (RU) slot information, radio unit (RU) port information, digital unit (DU) unique information, digital unit (DU) ID, digital unit (DU) name, etc. information, digital unit (DU) slot information, digital unit (DU) port information, wavelength information, and distribution box identification information such as a distribution box ID of a distribution box through which a line passes.
  • fronthaul device identification information such as fronthaul device ID, fronthaul device name information, radio unit (RU) unique information, radio unit (RU) ID, radio unit ( such as radio unit (RU)
  • Digital unit (DU) identification such as RU) identification information, radio unit (RU) slot information, radio unit (RU) port information, digital unit (DU) unique information, digital unit (DU) ID, digital unit (DU
  • the monitoring management unit 130 may obtain fronthaul line number information for each fronthaul device 220 based on fronthaul monitoring information including line information for each of a plurality of lines.
  • the monitoring management unit 130 may provide fronthaul line number information for each of the fronthaul devices 220 to the control unit 150 .
  • the base station management unit 140 may obtain base station number information based on data acquired from the digital unit (DU) 210 .
  • the base station number information includes base station identification information such as base station unique information, base station ID, base station name, etc., and base station distance information such as the distance between itself (digital unit or radio unit) and the connected counterpart base station (radio unit or digital unit). can do.
  • base station identification information such as base station unique information, base station ID, base station name, etc.
  • base station distance information such as the distance between itself (digital unit or radio unit) and the connected counterpart base station (radio unit or digital unit). can do.
  • the base station management unit 140 may obtain base station selection information for each base station based on data acquired from each digital unit (DU) 210 .
  • the base station management unit 140 may provide base station number information for each base station to the control unit 150 .
  • the control unit 150 controls the overall operation of each component of the automatic line number management device 100 .
  • the control unit 150 may obtain access network number information based on the fronthaul number information obtained through the monitoring and management unit 130 and the base station number information obtained through the base station management unit 140.
  • the access network numbering information may include radio unit (RU) numbering information, fronthaul device numbering information, and digital unit (DU) numbering information.
  • RU radio unit
  • DU digital unit
  • control unit 150 based on the fronthaul number information for each fronthaul device 220 and the base station number information for each base station, “radio unit (RU) number information - fronthaul device number information - digital unit ( DU) Access network number information consisting of a pair of "number information" may be obtained.
  • RU radio unit
  • DU digital unit
  • the information providing unit 160 may provide access network selection information to an external terminal at the request of an external terminal (not shown).
  • the storage unit 170 serves to store programs and data necessary for the operation of the device 100 for automatically managing line numbers, and may be divided into a program area and a data area.
  • the program area includes a program for controlling the overall operation of the automatic managing device 100, an operating system (OS) for booting the automatic managing device 100, an operation for acquiring fronthaul monitoring information, and a fronthaul driver.
  • Application programs necessary for the operation of the device 100 for automatic management of phone numbers such as an information acquisition operation, a base station number information acquisition operation, and an access network number information acquisition operation, may be stored.
  • the data area is an area in which data generated according to the use of the automatic line number management device 100 is stored, interface standard information between the digital unit (DU) 210 and the radio unit (RU), fronthaul monitoring information, Fronthaul line number information, base station line number information, access network line number information, and the like can be stored.
  • DU digital unit
  • RU radio unit
  • the automatic serial number management apparatus 100 connects a digital unit (DU) 210 and a radio unit (RU) 230 based on the passive WDM-based fronthaul device 220.
  • DU digital unit
  • RU radio unit
  • the operator can inquire downlink power and uplink power for a large number of lines.
  • the total distance of the passive ring network returning from the base station to the base station can be identified.
  • the disconnection point can be found automatically.
  • the automatic serial number management device 100 has been described as including the optical signal acquisition unit 110, monitoring unit 120, monitoring management unit 130, and base station management unit 140, the present invention is not limited thereto, and according to an embodiment, each of the optical signal acquisition unit 110, the monitoring unit 120, the monitoring management unit 130, and the base station management unit 140 is physically independent from the automatic serial number management device 100. It can be implemented as a device of Of course, the monitoring unit 120, the monitoring management unit 130, and the base station management unit 140 may be implemented as being included in the components of the mobile communication system 200.
  • FIG. 4 is a flowchart illustrating a method for automatically managing a forwarding number in a passive WDM fronthaul-based mobile communication system according to a preferred embodiment of the present invention.
  • the apparatus 100 for automatically managing line numbering may obtain an optical signal transmitted and received between a digital unit (DU) 210 and a radio unit (RU) 230 (S110).
  • DU digital unit
  • RU radio unit
  • the automatic line number management device 100 is installed in each of the optical transmission lines through a plurality of optical signal acquisition modules 111 installed in each optical transmission line between the fronthaul device 220 and the digital unit (DU) 210. An optical signal transmitted and received may be obtained.
  • the automatic serial number management device 100 may obtain fronthaul monitoring information based on an optical signal using interface standard information between the digital unit (DU) 210 and the radio unit (RU) 230. Yes (S120).
  • the automatic line number management device 100 includes a process of separating an optical signal into a plurality of signals, a process of selecting one signal from a plurality of signals, a process of amplifying the selected signal, and a process of inverting the amplified one signal.
  • a process of measuring the optical power of a signal for a selected one wavelength and a process of acquiring line information for a selected wavelength based on an electrical signal are performed to perform a fronthaul including line information for each of a plurality of lines. Monitoring information can be obtained.
  • the apparatus 100 for automatically managing line numbering may acquire fronthaul line number information based on the fronthaul monitoring information (S130).
  • the device for automatically managing line number 100 may obtain fronthaul line number information for each fronthaul device 220 based on fronthaul monitoring information including line information for each of a plurality of lines.
  • the apparatus 100 for automatic management of the phone number may acquire base station number information based on the data obtained from the digital unit (DU) 210 (S140).
  • the apparatus 100 for automatically managing the numbering number may obtain base station number information for each base station based on data obtained from each digital unit (DU) 210 .
  • the apparatus 100 for automatic management of the phone number may acquire access network number information based on the fronthaul number information and the base station number information (S150).
  • the apparatus 100 for automatically managing the numbering book is "radio unit (RU) number information-fronthaul device number information”.
  • Access network configuration information consisting of a pair of “-digital unit (DU) configuration information” may be acquired.
  • the apparatus 100 for automatically managing the phone number may provide the access network number information to the external terminal at the request of the external terminal (S160).
  • the method for automatically managing the numbering number according to the present invention has been described as performing a fronthaul number information acquisition operation (S110 to S130) followed by a base station number information acquisition operation (S140), the present invention is not limited thereto. Depending on the embodiment, after the base station number information acquisition operation (S140), the fronthaul number information acquisition operation (S110 to S130) is performed, or the fronthaul number information acquisition operation (S110 to S130) and the base station number information acquisition operation are performed. (S140) may be performed simultaneously.

Abstract

Dans un dispositif et un procédé de gestion automatique d'une feuille de numéro de ligne d'un système de communication mobile sur la base d'un fronthaul WDM passif selon un mode de réalisation préféré de la présente invention, le système de communication mobile comprend un réseau d'accès qui connecte une unité numérique (DU) et une unité radio (RU) sur la base d'un dispositif fronthaul à multiplexage par répartition en longueur d'onde (WDM) passif, et la feuille de numéro de ligne associée est automatiquement générée et mise à jour de manière à être automatiquement gérée, permettant ainsi à des informations de ligne d'être acquises plus efficacement lorsque le système fonctionne mal ou est en fonctionnement.
PCT/KR2021/018360 2021-12-03 2021-12-06 Dispositif et procédé de gestion automatique d'une feuille de numéro de ligne d'un système de communication mobile sur la base de fronthaul à multiplexage par répartition en longueur d'onde (wdm) passif WO2023101074A1 (fr)

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KR1020210172296A KR102517429B1 (ko) 2021-12-03 2021-12-03 수동형 wdm 프론트홀 기반 이동 통신 시스템의 선번장 자동 관리 장치 및 방법
KR10-2021-0172296 2021-12-03

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