Repeater optical fiber distribution network management system and upgrading method thereof

Abstract

The application discloses a kind of repeater optical fiber distribution network management system and its upgrading method, the network management system includes network management center, monitoring management center, near end and far end, monitoring management center initiates upgrade request to the access unit;Access unit responds upgrade confirmation;Monitoring management center transmits upgrade file data to access unit;Access unit checks the upgrade file, and decompresses the upgrade file, carries out version upgrade and restarts;Access unit sends upgrade request message to far end;Far end carries out upgrade and responds upgrade confirmation;Access unit transmits upgrade file, and sends start upgrade request message;Far end checks the upgrade file by MD5, carries out version upgrade, and after upgrade success, responds upgrade success message to access unit and restarts.The application reduces the use of data card flow, saves a large number of operation and maintenance cost of customer, reduces the transmission of a large number of data at the same time, reduces the probability of transmission link congestion, guarantees the robustness, reliability of equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of repeater management, and in particular to a repeater optical fiber distribution network management system and an upgrading method thereof. BACKGROUND

[0002] According to the technical specification requirements of the repeater network management function of an operator, such as the Technical Specification of MDAS Optical Fiber Distribution System Network Management Function and Interface, the network topology structure of the repeater optical fiber distribution network management system is as shown in Figure 1

[0003] In the prior art, there are two ways for device upgrading: (1) FTP mode, as shown in Figure 2 ; and (2) MCP-B mode.

[0004] In the existing methods, OMC (Operations and Maintenance Center) can only upgrade the devices one by one. At present, OMC upgrades the devices, whether they are near-end devices or far-end devices, by using a one-to-one upgrading mode, which has the following disadvantages:

[0005] (1) At present, the transmission channel of repeater management adopts the 4G / 5G Cat1 data card PS domain mode, and in the case of one-to-one upgrading of near-end and far-end devices, a large amount of data flow is wasted, and the operation and maintenance cost is increased.

[0006] (2) When upgrading the near-end and far-end devices at the same time, a large amount of upgrading data causes congestion of the transmission link between the near-end and the OMC and congestion of the CPRI link between the near-end and the far-end unit, and finally increases the risk of upgrading failure.

[0007] (3) When the same near-end unit is expanded, the OMC cannot timely perceive the existence of the expanded unit, which leads to inconsistent versions, abnormal services, increases the amount of customer complaints, and affects the user experience. SUMMARY

[0008] The technical problem to be solved by the embodiments of the present application is to provide a repeater optical fiber distribution network management system and an upgrading method thereof to reduce the use of data card flow and ensure the robustness and reliability of the device.

[0009] To solve the above technical problems, the embodiments of the present application provide a repeater optical fiber distribution network management system, which comprises a network management center, an operations and maintenance center, a near-end and a far-end, the operations and maintenance center is connected with a plurality of near-ends, the near-end is connected with a plurality of far-ends, the near-end comprises an access unit, the far-end comprises an expansion unit and a far-end unit,

[0010] ​When the monitoring management center needs to upgrade the version of a certain access unit and its connected remote terminal, the monitoring management center initiates an upgrade request to the access unit;

[0011] When the access unit confirms that the upgrade condition is met, the access unit responds to the monitoring management center with an upgrade confirmation;

[0012] The monitoring management center transmits upgrade file data to the access unit through MCP-B / FTP, and the access unit receives and saves the upgrade file transmission;

[0013] The access unit checks whether the upgrade file is transmitted completely through MD5; if the MD5 check fails, the access unit responds to the monitoring management center with an upgrade failure, otherwise, the access unit responds to the monitoring management center OMC with an upgrade success, decompresses the upgrade file, checks the related configuration, and confirms whether the upgrade is needed, if needed, the access unit performs version upgrade and restarts;

[0014] The access unit checks the registration of the remote terminal, reads the MD5 value of the upgrade file, and sends an upgrade request message to the corresponding remote terminal with the value;

[0015] The remote terminal checks the MD5 value of its own upgrade file, and compares it with the MD5 value sent by the access unit; if they are equal, no upgrade is performed; otherwise, the upgrade is performed, and an upgrade confirmation is responded;

[0016] The access unit transmits the upgrade file to the remote terminal responding to the upgrade confirmation through FTP, and sends a start upgrade request message to the remote terminal responding to the upgrade confirmation;

[0017] The remote terminal checks whether the upgrade file is transmitted completely through MD5, if the file is not complete, the remote terminal responds to the access unit with an upgrade failure message; if the file is complete, the remote terminal decompresses the upgrade file, checks the related configuration, confirms whether the upgrade is needed, if needed, the remote terminal performs version upgrade, and responds to the access unit with an upgrade success message and restarts after the upgrade is successful.

[0018] Correspondingly, the embodiment of the application also provides an upgrade method of the repeater optical fiber distribution network management system, comprising:

[0019] The upgrade confirmation step: when the monitoring management center needs to upgrade the version of a certain access unit and its connected remote terminal, the monitoring management center initiates an upgrade request to the access unit; when the access unit confirms that the upgrade condition is met, the access unit responds to the monitoring management center with an upgrade confirmation;

[0020] The file transmission step: the monitoring management center transmits upgrade file data to the access unit through MCP-B / FTP, and the access unit receives and saves the upgrade file transmission;

[0021] Proximal upgrade step: the access unit checks whether the upgrade file is transmitted completely by MD5; if the MD5 check is not passed, the access unit responds to the monitoring management center that the upgrade fails, otherwise, the access unit responds to the monitoring management center OMC that the upgrade succeeds, decompresses the upgrade file, checks the related configuration, and confirms whether the upgrade is needed, if needed, the access unit performs version upgrade and restarts;

[0022] Upgrade request step: the access unit checks the registration of the remote end, reads the MD5 value of the upgrade file and sends the upgrade request message to the corresponding remote end; the remote end checks the MD5 value of the upgrade file and compares it with the MD5 value sent by the access unit; if they are equal, the remote end does not upgrade; otherwise, the remote end upgrades and responds to the upgrade confirmation;

[0023] Remote upgrade step: the access unit transmits the upgrade file to the remote end responding to the upgrade confirmation by FTP, and sends the start upgrade request message to the remote end responding to the upgrade confirmation; the remote end checks whether the upgrade file is transmitted completely by MD5, if the file is not complete, the remote end responds to the access unit that the upgrade fails; if the file is complete, the remote end decompresses the upgrade file, checks the related configuration, confirms whether the upgrade is needed, if needed, the remote end performs version upgrade, and responds to the access unit that the upgrade succeeds and restarts after the upgrade succeeds.

[0024] The present application has the following advantages:

[0025] (1) The present application reduces the use of data card flow, saves a large number of operation and maintenance costs of customers.

[0026] (2) The present application reduces the transmission of a large number of data at the same time, reduces the probability of transmission link congestion, and guarantees the robustness and reliability of the equipment.

[0027] (3) The present application guarantees the stable operation of the business, reduces customer complaints, and improves customer satisfaction. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a network topology structure diagram of the repeater optical fiber distribution network management system.

[0029] Figure 2 It is a schematic diagram of the existing FTP upgrade process.

[0030] Figure 3 It is a schematic diagram of the upgrade process of the repeater optical fiber distribution network management system of the embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of the upgrade process of the embodiment 1 of the present application.

[0032] Figure 5 It is a schematic diagram of the upgrade process of the embodiment 2 of the present application.

[0033] Figure 6 Figure 3 is a schematic diagram of an upgrade process according to an embodiment of the present application. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, and the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the embodiments of the present application, if there is a directional indication (such as up, down, left, right, front, back, etc.), it is only used to explain the relative position relationship, motion condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, in the present application, if the description involves "first", "second", etc., it is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features.

[0037] Please refer to Figure 1 The repeater optical fiber distribution network management system of the embodiment of the present application is composed of a network management center (NMC), a monitoring management center (OMC), and a radio frequency feeding digital distribution system.

[0038] The network management center (NMC) is located at the top of the system, communicates with the monitoring management center (OMC) below through a northbound interface. Figure 1

[0039] The monitoring management center (OMC) is in the middle position, is connected with the radio frequency feeding digital distribution system below through a southbound interface, and simultaneously exchanges data with the access unit through a mobile communication network.

[0040] The radio frequency feeding digital distribution system part is composed of multiple levels and units, that is, includes a near end and a far end. The monitoring management center is connected with a plurality of near ends, the near end is connected with a plurality of far ends, the near end includes an access unit, and the far end includes an expansion unit and a far end unit.

[0041] The access unit is the entrance of the radio frequency feeding digital distribution system, is connected with the monitoring management center (OMC) above through an optical fiber, and is connected with the expansion unit.

[0042] The expansion unit is connected with a plurality of expansion units below the access unit, and these expansion units are further connected with the far end unit through an optical fiber or a network cable / optical fiber.

[0043] ​Remote unit: located at the bottom layer of the RF feed-in digital distribution system, each expansion unit can connect multiple remote units, which are the end nodes of the system, responsible for specific signal processing and transmission.

[0044] The repeater optical fiber distribution network management system realizes effective management and signal transmission from the network management center to the end remote unit through hierarchical management and distributed architecture. The monitoring and management center is responsible for overall monitoring and management, and the access unit, expansion unit and remote unit cooperate to complete the functions of RF signal feeding and digital distribution.

[0045] Please refer to Figure 3 When upgrading some modules of the RF feed-in digital distribution system, the upgrade process is as follows:

[0046] (1) When the access unit (near end) is powered on and started, the 4G / 5G Cat1 data card establishes a PS domain transmission channel, and initiates a login report to the monitoring and management center OMC through the MCP-A / MCP-C protocol.

[0047] (2) When the monitoring and management center OMC confirms that the access unit (near end) is legal and valid, it responds to the login report success through the MCP-A / MCP-C protocol.

[0048] (3) At the same time, when the expansion unit / remote unit 1 (remote 1) is powered on and started, a CPRI transmission channel is established, and a registration request message is initiated to the access unit (near end) through the TCP protocol.

[0049] (4) The access unit (near end) replies to the registration response message, and at this time the expansion unit / remote unit 1 (remote 1) is registered successfully.

[0050] (5) Similarly, when the expansion unit / remote unit N (remote N) is powered on and started, a CPRI transmission channel is established, and a registration request message is initiated to the access unit (near end) through the TCP protocol.

[0051] (6) The access unit (near end) replies to the registration response message, and at this time the expansion unit / remote unit N (remote N) is registered successfully. In this process, multiple expansion units / remote units (remote) connected to the access unit (near end) successively establish connection with the access unit (near end) through the same mechanism.

[0052] (7) When the monitoring and management center OMC needs to upgrade a certain access unit (near end) and its connected expansion unit / remote unit (remote), the OMC only needs to initiate an upgrade request to the access unit (near end).

[0053] (8) The access unit (near end) confirms that the upgrade conditions are met, and responds to the upgrade confirmation to the monitoring and management center OMC.

[0054] (9) The OMC transmits the upgrade file data to the access unit (near end) through the MCP-B / FTP, and the access unit (near end) waits for the upgrade file transmission to be completed and saved in the non-volatile memory.

[0055] (10) The access unit (near end) checks whether the upgrade file is transmitted completely through MD5.

[0056] (11) If the MD5 check fails, the access unit (near end) responds to the OMC with an upgrade failure; otherwise, the access unit (near end) responds to the OMC with an upgrade success.

[0057] (12) The access unit (near end) decompresses the upgrade file, checks the related configuration, and confirms whether the access unit needs to be upgraded. If yes, the access unit (near end) is upgraded in version and restarted.

[0058] (13) The access unit (near end) checks the registration of the extension unit / remote unit (remote end), reads the MD5 value of the upgrade file, and sends an upgrade request message to the extension unit / remote unit (remote end) with the value.

[0059] (14) The extension unit / remote unit (remote end) checks the MD5 value of the upgrade file of itself, and compares it with the MD5 value sent in (13). If they are equal, it is considered that the unit has upgraded the file and does not need to be upgraded; otherwise, the extension unit / remote unit needs to be upgraded and responds to the upgrade confirmation.

[0060] (15) The access unit (near end) transmits the upgrade file to the extension unit / remote unit (remote end) in (14) through the FTP.

[0061] (16) The access unit (near end) sends a start upgrade request message to the extension unit / remote unit (remote end) in (14).

[0062] (17) The extension unit / remote unit (remote end) in (14) checks whether the upgrade file is transmitted completely through MD5. If the file is complete, the extension unit / remote unit (remote end) decompresses the upgrade file, checks the related configuration, and confirms whether the unit needs to be upgraded. If yes, the extension unit / remote unit (remote end) is upgraded in version.

[0063] (18) If the file is not complete, the extension unit / remote unit (remote end) responds to the access unit (near end) with an upgrade failure message; otherwise, the extension unit / remote unit (remote end) responds to the access unit (near end) with an upgrade success message and restarts the unit after the upgrade is successful.

[0064] (19)-(24), other extension unit / remote unit (remote) using the same steps (13)-(18) to upgrade confirmation.

[0065] As an embodiment, when the access unit (near end) upgrades the extension unit / remote unit (remote), considering the particularity of the CPRI interface, and in order to improve the efficiency of the upgrade and the robustness and stability of the entire system, the application adopts the following strategies:

[0066] (1) The access unit (near end) monitors the delay (RTT), packet loss rate (LOS), and jitter (Jitter) of each transmission link in real time through the heartbeat mechanism with each extension unit / remote unit (remote).

[0067] (2) The parameters of each transmission link are sorted and ranked, and the robustness of the entire CPRI transmission is determined based on the results for hierarchical processing.

[0068] First level: When the packet loss rate (LOS) of all transmission links is 0, the average jitter (Jitter) is less than 10ms, and the delay (RTT) is less than 50ms, the access unit (near end) can upgrade up to three extension units / remote units (remote) at the same time.

[0069] Second level: When the packet loss rate (LOS) of all transmission links is less than 3%, the average jitter (Jitter) is less than 15ms, and the delay (RTT) is less than 70ms, the access unit (near end) can upgrade up to two extension units / remote units (remote) at the same time.

[0070] Third level: In other cases, the access unit (near end) can upgrade up to one extension unit / remote unit (remote) at the same time.

[0071] (3) When there is an extension unit / remote unit (remote) that fails to upgrade, the upgrade priority of the unit is reduced to ensure that other device units are upgraded first. When the other device units are upgraded, the previously failed device units are upgraded one by one.

[0072] The upgrade method of the repeater optical fiber distribution network management system of the embodiment of the application comprises:

[0073] Upgrade confirmation step: When the monitoring and management center needs to upgrade the version of a certain access unit and its connected remote, the monitoring and management center initiates an upgrade request to the access unit; the access unit confirms that the upgrade conditions are met, and responds to the upgrade confirmation to the monitoring and management center.

[0074] File transmission step: the monitoring management center transmits the upgrade file data to the access unit through the MCP-B / FTP mode, the access unit receives the upgrade file transmission and saves it;

[0075] Proximal upgrade step: the access unit checks whether the upgrade file is transmitted completely through MD5; if the MD5 check is not passed, the access unit responds to the monitoring management center that the upgrade fails, otherwise, the access unit responds to the monitoring management center OMC that the upgrade succeeds, decompresses the upgrade file, checks the related configuration, and confirms whether the upgrade is needed, if needed, the access unit performs the version upgrade and restarts;

[0076] Upgrade request step: the access unit checks the registration of the distal end, reads the MD5 value of the upgrade file, and sends an upgrade request message to the corresponding distal end; the distal end checks the MD5 value of the upgrade file, and compares it with the MD5 value sent by the access unit; if they are equal, the distal end does not upgrade; otherwise, the distal end upgrades and responds to the upgrade confirmation;

[0077] Distal upgrade step: the access unit transmits the upgrade file to the distal end that responds to the upgrade confirmation through the FTP mode, and sends a start upgrade request message to the distal end that responds to the upgrade confirmation; the distal end checks whether the upgrade file is transmitted completely through MD5, if the file is not complete, the distal end responds to the upgrade failure message to the access unit; if the file is complete, the distal end decompresses the upgrade file, checks the related configuration, confirms whether the upgrade is needed, if needed, the distal end performs the version upgrade, and responds to the upgrade success message to the access unit and restarts after the upgrade succeeds.

[0078] As an implementation mode, the upgrade confirmation step further comprises the following steps before the upgrade confirmation step:

[0079] Proximal login step: after the power-on start, the access unit establishes a PS domain transmission channel, and initiates a login report to the monitoring management center through the MCP-A / MCP-C protocol; when the monitoring management center confirms that the access unit is legal and valid, the monitoring management center responds to the login report success through the MCP-A / MCP-C protocol.

[0080] As an implementation mode, the upgrade confirmation step further comprises the following steps before the upgrade confirmation step:

[0081] Distal login step: when the distal end is powered on, the distal end establishes a CPRI transmission channel, and initiates a registration request message to the access unit through the TCP protocol; the access unit returns a registration response message.

[0082] As an implementation mode, the access unit adopts the following strategy when upgrading the distal end:

[0083] The access unit monitors the time delay, packet loss rate and jitter of each transmission link in real time through the heartbeat mechanism with each remote terminal, sorts each transmission link according to the time delay, packet loss rate and jitter, determines the robustness of the entire CPRI transmission according to the sorting result, and performs hierarchical processing; when there is a remote terminal with upgrade failure, the upgrade priority of the remote terminal is reduced to ensure that other remote terminals are upgraded preferentially; when the upgrade of other remote terminals is completed, the remote terminal with previous upgrade failure is upgraded in a one-to-one manner.

[0084] As an implementation, the access unit performs hierarchical processing according to the following levels:

[0085] The first level: when the packet loss rate of all transmission links is 0, the average jitter is less than 10 ms, and the time delay is less than 50 ms, the access unit upgrades at most three remote terminals at the same time in this case;

[0086] The second level: when the packet loss rate of all transmission links is less than 3%, the average jitter is less than 15 ms, and the time delay is less than 70 ms, the access unit upgrades at most two remote terminals at the same time in this case;

[0087] The third level: in other cases, the access unit upgrades at most one remote terminal at the same time.

[0088] Example 1, only the access unit (near end) is upgraded, the upgrade process is as shown in Figure 4 .

[0089] The access unit (near end) sends a login reporting request to the monitoring management center OMC, the monitoring management center OMC responds to the login reporting request, the monitoring management center OMC initiates an upgrade request, the access unit (near end) initiates an upgrade request confirmation, the monitoring management center OMC transmits upgrade file data to the access unit through the MCP-B / FTP mode, the access unit verifies the MD5 value of the upgrade package through MD5, and decompresses the file to upgrade the access unit, the access unit responds to the monitoring management center OMC that the upgrade is successful, the access unit (near end) restarts the device, and the upgrade file takes effect.

[0090] Example 2, only one expansion unit / remote terminal unit (remote terminal) is upgraded, the upgrade process is as shown in Figure 5 .

[0091] The access unit (near end) sends a login reporting request to the monitoring management center OMC, the monitoring management center OMC responds to the login reporting request, the monitoring management center OMC initiates an upgrade request, the access unit (near end) initiates an upgrade request confirmation, the monitoring management center OMC transmits the upgrade file data to the access unit in the manner of MCP-B / FTP, the access unit verifies the MD5 value of the upgrade package by MD5, and the access unit responds to the monitoring management center OMC with an upgrade success; the access unit (near end) initiates an upgrade request to the extension unit / remote unit (remote end), the extension unit / remote unit (remote end) initiates an upgrade request confirmation to the access unit (near end), the access unit (near end) transmits the upgrade file to the extension unit / remote unit (remote end) in the manner of FTP and sends a start upgrade request message; the extension unit / remote unit (remote end) verifies the MD5 value of the upgrade package by MD5 and upgrades the device by decompressing the file; the extension unit / remote unit (remote end) responds to the access unit (near end) with an upgrade completion message and restarts the device, and the upgrade file takes effect.

[0092] Embodiment 3, when the newly expanded extension unit / remote unit (remote end) registers to the access unit, the upgrade process is as shown in Figure 6

[0093] The newly expanded extension unit / remote unit (remote end) initiates a registration request message to the access unit (near end); the access unit replies with a registration confirmation message and judges whether the newly expanded extension unit / remote unit (remote end) needs to be upgraded, if so, initiates an upgrade request; the newly expanded extension unit / remote unit (remote end) initiates an upgrade request confirmation to the access unit (near end), the access unit (near end) transmits the upgrade file to the newly expanded extension unit / remote unit (remote end) in the manner of FTP and sends a start upgrade request message; the newly expanded extension unit / remote unit (remote end) verifies the MD5 value of the upgrade package by MD5 and upgrades the device by decompressing the file; the newly expanded extension unit / remote unit (remote end) responds to the access unit (near end) with an upgrade completion message and restarts the device, and the upgrade file takes effect.

[0094] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalent ranges.​

Claims

1. A repeater optical fiber distribution network system, comprising a network management center, a monitoring management center, a near end and a far end, the monitoring management center being connected with a plurality of near ends, the near end being connected with a plurality of far ends, the near end comprising an access unit, the far end comprising an expansion unit and a far end unit, characterized in that when the monitoring management center needs to upgrade the version of a certain access unit and the far ends connected therewith, the monitoring management center initiates an upgrade request to the access unit; if the access unit confirms that the upgrade condition is met, the access unit responds to the monitoring management center with an upgrade confirmation; the monitoring management center transmits the upgrade file data to the access unit through MCP-B / FTP, the access unit receives the upgrade file transmission and saves it; the access unit checks whether the upgrade file is transmitted completely through MD5; if the MD5 check fails, the access unit responds to the monitoring management center with an upgrade failure, otherwise, the access unit responds to the monitoring management center OMC with an upgrade success, decompresses the upgrade file, checks the relevant configuration, confirms whether the upgrade is needed, and if needed, the access unit performs the version upgrade and restarts; the access unit checks the registration of the far end, reads the MD5 value of the upgrade file and sends an upgrade request message to the corresponding far end with the value; the far end checks the MD5 value of the upgrade file itself and compares it with the MD5 value sent by the access unit; if they are equal, no upgrade is performed, otherwise, the upgrade is performed and an upgrade confirmation is responded; the access unit transmits the upgrade file to the far end responding to the upgrade confirmation through FTP and sends a start upgrade request message to the far end responding to the upgrade confirmation; the far end checks whether the upgrade file is transmitted completely through MD5, if the file is not complete, the far end responds to the access unit with an upgrade failure message; if the file is complete, the far end decompresses the upgrade file, checks the relevant configuration, confirms whether the upgrade is needed, if needed, the far end performs the version upgrade, responds to the access unit with an upgrade success message and restarts after the upgrade is successful. After the access unit is powered on and started, a PS domain transmission channel is established, a login report is initiated to the monitoring management center through MCP-A / MCP-C protocol, and the monitoring management center responds to the login report success through MCP-A / MCP-C protocol when confirming that the access unit is legal and valid.

2. The repeater optical distribution network system of claim 1, wherein, When the far end is powered on and started, a CPRI transmission channel is established, a registration request message is initiated to the access unit through TCP protocol, and the access unit returns a registration response message.

3. The repeater optical distribution network system of claim 1, wherein, The access unit monitors the time delay, packet loss rate and jitter of each transmission link in real time through the heartbeat mechanism with each far end, sorts each transmission link according to the time delay, packet loss rate and jitter, determines the robustness of the current CPRI transmission according to the sorting result, and performs hierarchical processing; when there is a far end with upgrade failure, the upgrade priority of the far end is reduced to ensure that other far ends are upgraded preferentially; when the other far ends are upgraded, the far end with upgrade failure is upgraded in a one-to-one manner.

4. The repeater optical distribution network system of claim 1, wherein, The access unit performs hierarchical processing according to the following levels:

5. The repeater optical distribution network system of claim 4, wherein the optical distribution unit is configured to receive the optical signals from the optical line termination unit and to transmit the optical signals to the optical network termination unit. First level: when the packet loss rate of all transmission links is 0, the average jitter is less than 10 ms, and the time delay is less than 50 ms, the access unit simultaneously upgrades at most three far ends in this case. ​ Level 2: When the packet loss rate of all transmission links is less than 3%, the average jitter is less than 15ms, and the latency is less than 70ms, the access unit can upgrade to a maximum of two remote units at the same time. Level 3: In other cases, the access unit can upgrade to a maximum of one remote device at a time.

6. An upgrading method of a repeater optical fiber distribution network system, characterized by, include: Upgrade confirmation steps: When the monitoring and management center needs to upgrade the version of an access unit and its connected remote device, the monitoring and management center initiates an upgrade request to the access unit; if the access unit confirms that the upgrade conditions are met, it responds to the monitoring and management center with an upgrade confirmation. File transfer steps: The monitoring and management center transmits upgrade file data to the access unit via MCP-B / FTP, and the access unit receives and saves the upgrade file; Near-end upgrade steps: The access unit checks whether the upgrade file has been transmitted completely using MD5; If the MD5 check fails, the upgrade fails to be reported to the monitoring and management center. Otherwise, the upgrade succeeds to be reported to the monitoring and management center (OMC), the upgrade file is decompressed, the relevant configuration is checked, and it is confirmed whether an upgrade is needed. If so, the access unit performs a version upgrade and restarts. Upgrade request steps: The access unit checks the registration status of the remote end, reads the MD5 value of the upgrade file, and sends an upgrade request message to the corresponding remote end with the value. The remote check calculates the MD5 value of its own upgrade file and compares it with the MD5 value sent by the access unit. If they are equal, no upgrade will be performed; otherwise, an upgrade will be performed and an upgrade confirmation will be issued. Remote upgrade steps: The access unit transfers the upgrade file to the remote end that has responded with upgrade confirmation via FTP, and sends a start upgrade request message to the remote end that has responded with upgrade confirmation; the remote end checks whether the upgrade file has been transferred completely using MD5. If the file is incomplete, it responds to the access unit with an upgrade failure message. If the file is complete, unzip the upgrade file, check the relevant configuration, confirm whether an upgrade is needed, and if so, perform the version upgrade. After a successful upgrade, send a success message to the access unit and restart.

7. The upgrade method for the repeater fiber optic distribution network management system as described in claim 6, characterized in that, The upgrade confirmation process also includes: Near-end login steps: After the access unit is powered on, it establishes a PS domain transmission channel and initiates a login report to the monitoring and management center through the MCP-A / MCP-C protocol; when the monitoring and management center confirms that the access unit is legitimate and valid, it responds with a login report success message through the MCP-A / MCP-C protocol.

8. The method of claim 6, wherein the upgrade of the repeater optical fiber distribution network system is performed by, The upgrade confirmation process also includes: Remote login steps: When the remote device is powered on, it establishes a CPRI transmission channel and sends a registration request message to the access unit via the TCP protocol; the access unit replies with a registration response message.

9. The method of claim 6, wherein the upgrade of the repeater optical fiber distribution network system is performed by, When upgrading remote devices, the access unit adopts the following strategy: The access unit monitors the time delay, packet loss rate and jitter of each transmission link in real time through the heartbeat mechanism with each remote terminal, sorts each transmission link according to the time delay, packet loss rate and jitter, determines the robustness of the whole CPRI transmission according to the sorting result, and performs hierarchical processing; when there is a remote terminal with upgrade failure, the upgrade priority of the remote terminal is reduced to ensure that other remote terminals are upgraded preferentially; when the upgrade of other remote terminals is completed, the remote terminal with previous upgrade failure is upgraded in a one-to-one manner.

10. The method of claim 9, wherein the method further comprises: providing a new optical fiber distribution network for the repeater system; and connecting the new optical fiber distribution network to the existing optical fiber distribution network. 10 The access unit performs hierarchical processing according to the following levels: First level: when the packet loss rate of all transmission links is 0, the average jitter is less than 10 ms, and the time delay is less than 50 ms, the access unit upgrades at most three remote terminals simultaneously in this case; Second level: when the packet loss rate of all transmission links is less than 3%, the average jitter is less than 15 ms, and the time delay is less than 70 ms, the access unit upgrades at most two remote terminals simultaneously in this case; Third level: in other cases, the access unit upgrades at most one remote terminal simultaneously.

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