OLT important service guarantee system and method

Abstract

The invention belongs to the technical field of optical transmission networks, and particularly discloses an OLT (optical line terminal) important service guarantee system and method.The system comprises a first scheme and a second scheme, and ports of an OLT are set to be main PON (passive optical network) ports and / or standby PON ports according to needs; the main port of the guarantee controller is connected with the main PON port of the current OLT, the standby port of the guarantee controller is connected with the standby PON port of the adjacent OLT, the guarantee controller is connected with the port of the important service equipment, and the service data configuration of the important service equipment at the main PON port of the current OLT is the same as the service data configuration of the standby PON port of the adjacent OLT. And the port of the general service equipment is directly connected with the OLT. According to the technical scheme, the guarantee controller is arranged, the important service optical splitter and the general service optical splitter are divided, and transmission of important services is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of optical transmission network, and relates to an OLT (Optical Line Terminal) important service guarantee system and method. Background Art

[0002] The mainstream technologies of distribution communication networks include industrial Ethernet switches, EPON (Ethernet Passive Optical Network), wireless private networks, etc. Considering the economy, stability and reliability of various technologies, most power companies choose to use EPON technology as the networking method for distribution communication networks.

[0003] Generally speaking, the communication terminal access network and the communication backbone network are on different planes, and the network topology is planned independently. In the EPON system, OLT is deployed in the substation, and ONU (Optical Network Unit) is deployed in each ring network cabinet, switchgear and other distribution terminal sites. The network adopts a hand-in-hand protection method. Each ONU is connected to two OLT devices through two main and standby links respectively. OLT is connected to the local SDH equipment through the second-layer interface, and transmits data to the main station system through the SDH (Synchronous Digital Hierarchy) dedicated line to ensure normal network operation under N-1 failure.

[0004] However, due to the wide coverage of the terminal communication access network and the large number of sites involved, there is a lack of appropriate methods for overall consideration during planning. If the OLT is directly connected to the main station through a dedicated line, although the network structure is simplified, it will bring the hidden danger of a single point failure affecting the entire network, and each substation needs to open a dedicated line to the main station, which greatly wastes bandwidth in the network.

[0005] In the prior art, for example, Patent 201720129924.0 discloses a terminal communication access network EPON ring networking structure, including ONU, OLT, aggregation switch, SDH equipment; SDH equipment is set in each substation, and the SDH equipment of each substation forms an SDH backbone ring network through a ring networking method; OLT and aggregation switch are installed in each substation in the SDH backbone ring network; ONU is installed in the power distribution terminal site; each ONU is connected to the OLT of two adjacent substations through the main and backup links. This structure uses the existing transmission resources of the communication backbone network to improve the utilization rate of optical cables, but it does not divide the transmission of important services and general services, and cannot guarantee the transmission of important services. Summary of the invention

[0006] The purpose of the present invention is to provide an OLT important service guarantee system and method to ensure the transmission of important services.

[0007] In order to achieve the above object, the basic scheme of the present invention is: an OLT important service guarantee system, including one of the following schemes:

[0008] Solution 1: including a security controller, the ports of the OLT are set as active PON ports and / or standby PON ports as needed;

[0009] The security controller is provided with a main port and a backup port. The main port of the security controller is connected to the main PON port of the current OLT, the backup port of the security controller is connected to the backup PON port of the adjacent OLT, and the security controller is connected to the port of the important business equipment.

[0010] The service data configuration of important service equipment on the main PON port of the current OLT and the backup PON port of the adjacent OLT is the same;

[0011] The ports of general business equipment are directly connected to the OLT;

[0012] Solution 2: including a security controller, the ports of the OLT are set as a primary PON port and a backup PON port;

[0013] The main port and the backup port of the security controller are respectively connected to the main PON port and the backup PON port of the OLT, and the main PON port and the backup PON port of the OLT are connected in the same configuration;

[0014] Ensure port connection between controller and important business equipment;

[0015] The ports of general business equipment are directly connected to the OLT.

[0016] The working principle and beneficial effects of this basic solution are as follows: This technical solution sorts out the important business ports (main PON ports) and idle available ports (backup PON ports) of the PON equipment in each access site OLT, configures a protection controller for each important dedicated line service, and the optical MODEM equipment of the important services on the user side also has the support for connecting the PON ports of two OLTs to ensure the transmission of important services.

[0017] Further, it also includes a 1 / 2 optical splitter and a 2 / 1 optical switching switch;

[0018] The input end of the 1 / 2 optical splitter is connected to the security controller, and the two output ends of the 1 / 2 optical splitter are respectively connected to the two input ends of the 2 / 1 optical switching switch, and the two output lines have different routing information;

[0019] The output end of the 2 / 1 optical switching switch is connected to the port of the important business equipment.

[0020] The security controller on the PON port side is close to the user side and has a built-in 1 / 2 splitter, so that it can reach the user side of important services through two optical cable lines with different routes, or access the ONU on the user side of important services that supports dual-port input.

[0021] A 2 / 1 optical switching switch is configured on the user side or the optical cross-connection box side to access the ONU with a single port input. When any optical cable line is interrupted, it automatically switches to another backup route to ensure that important customer services are not interrupted when the end optical cable line fails.

[0022] Furthermore, the standby port is connected to the standby PON port of the adjacent site through the ODF and the outgoing optical cable of the current site and then through the ODF of the adjacent site.

[0023] The connection structure is simple and easy to use.

[0024] Furthermore, it also includes a cloud server platform, which is connected to the security controller via a wireless transmission module.

[0025] Through the cloud server platform, data can be sent and received remotely, which is convenient for use.

[0026] The present invention also provides an OLT important service guarantee method for the system of the present invention, comprising the following steps:

[0027] When using ports of different OLTs as backup PON ports, if any OLT loses power, the security controller automatically switches the important service equipment to another port of the security controller to ensure that the important service is not interrupted;

[0028] The security controller detects the optical signals of the main PON port and the backup PON port of the OLT in real time. When the front-end circuit of one of the main PON port and the backup PON port fails and there is no optical signal, it automatically switches to another route to ensure that the service is not interrupted.

[0029] This method ensures that the line is connected when the optical device loses power or fails, ensuring that important services are not interrupted.

[0030] Furthermore, the 2 / 1 optical switching switch detects the optical signals of the two optical cable routes in real time. When there is no optical signal at the current main port, it automatically switches to the port of the other optical cable route to ensure that important services at the end are not interrupted.

[0031] The port switching is controlled by a 2 / 1 optical switching switch, which is easy to operate and can solve the problem of terminal line failure and ensure that important services at the terminal are not interrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the scheme 1 of the OLT important service guarantee system of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of the OLT important service guarantee system of the present invention. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0037] The invention discloses an OLT important service guarantee system, which sorts out the important service ports (main PON ports of the site) and idle available ports (standby PON ports of the site) of the PON equipment in each access site OLT to ensure the transmission of important services.

[0038] like Figure 1 and Figure 2 As shown, the OLT (optical line terminal) important service guarantee system includes one of the following solutions:

[0039] Solution 1: including a security controller, the ports of the OLT are set as the main PON port and / or the backup PON port as needed (mainly according to different scenarios, the OLT may have only the main PON port, and the adjacent OLT may have the backup PON port; or the OLT main PON port and the backup PON port are both set);

[0040] Ensure that the controller is equipped with a main port and a backup port, ensure that the main port of the controller is electrically connected to the main PON port of the current OLT, ensure that the backup port of the controller is electrically connected to the backup PON port of the adjacent OLT, and ensure that the controller is electrically connected to the ports of important business equipment.

[0041] The service data configuration of important service equipment on the main PON port of the current OLT and the backup PON port of the adjacent OLT is the same (wavelength configuration, ONT, ONU configuration, service configuration, priority configuration, etc.);

[0042] The ports of general business equipment are directly connected to the OLT;

[0043] Solution 2: including a security controller, the ports of the OLT are set as a primary PON port and a backup PON port;

[0044] Ensure that the main port and the backup port of the controller are electrically connected to the main PON port and the backup PON port of the OLT respectively, and the main PON port and the backup PON port of the OLT are connected in the same configuration;

[0045] Ensure electrical connection between the controller and ports of important business equipment;

[0046] The ports of general service equipment are directly electrically connected to the OLT.

[0047] In a preferred embodiment of the present invention, the OLT important service guarantee system further comprises a 1 / 2 optical splitter and a 2 / 1 optical switching switch; the input end of the 1 / 2 optical splitter is connected to the guarantee controller, the two output ends of the 1 / 2 optical splitter are respectively electrically connected to the two input ends of the 2 / 1 optical switching switch, and the two output lines have different routing information. The output end of the 2 / 1 optical switching switch is electrically connected to the port of the important service equipment.

[0048] The security controller on the PON port side is close to the user side and has a built-in 1 / 2 splitter, so that it can reach the user side of important services through two optical cable lines with different routes, or access the ONU that supports dual-port input on the user side of important services; or configure a 2 / 1 optical switching switch on the user side or the optical cross-connection box side to access the ONU with a single-port input. When any optical cable line is interrupted, it automatically switches to another backup route to ensure that important customer services are not interrupted when the end optical cable line fails.

[0049] In a preferred solution of the present invention, the standby port is electrically connected to the standby PON port of the adjacent site through the ODF and outgoing optical cable of the current site and then through the ODF (optical distribution frame) of the adjacent site.

[0050] In a preferred solution of the present invention, the security controller includes a 1 / 2-way optical switch, and the security controller gates the connection port, which is easy to operate.

[0051] In a preferred embodiment of the present invention, the OLT important service guarantee system further comprises a cloud server platform, which is electrically connected to the guarantee controller via a wireless transmission module. Through the cloud server platform, data can be remotely sent and received, and remote centralized monitoring of the guarantee controller can be achieved.

[0052] The present invention also provides an OLT important service guarantee method for the system of the present invention, comprising the following steps:

[0053] When using ports of different OLTs as backup PON ports, if any OLT loses power, the security controller automatically switches the important service equipment to another port of the security controller to ensure that the important service is not interrupted;

[0054] The controller detects the optical signals of the main PON port and the backup PON port of the OLT in real time (specifically, it can be detected through the optical power detection module at the break). When the front-end circuit of one of the main PON port and the backup PON port fails or there is no optical signal, it automatically switches to another route to ensure uninterrupted business.

[0055] This method ensures that the line is connected when the optical device loses power or fails, ensuring that important services are not interrupted.

[0056] Preferably, the 2 / 1 optical switching switch detects the optical signals of the two optical cable routes in real time (the detection can be performed using an optical power meter, and preferably the optical power meter can be integrated inside the optical switching switch). When there is no optical signal at the current main port, it automatically switches to the port of the other optical cable route to ensure that important services at the end are not interrupted.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An OLT important service guarantee system, characterized in that: This includes one of the following options: Solution 1: including a security controller, the ports of the OLT are set as active PON ports and / or standby PON ports as needed; The security controller is provided with a main port and a backup port. The main port of the security controller is connected to the main PON port of the current OLT, the backup port of the security controller is connected to the backup PON port of the adjacent OLT, and the security controller is connected to the port of the important business equipment. The service data configuration of important service equipment on the main PON port of the current OLT and the backup PON port of the adjacent OLT is the same; The ports of general business equipment are directly connected to the OLT; Solution 2: including a security controller, the ports of the OLT are set as a primary PON port and a backup PON port; The main port and the backup port of the security controller are respectively connected to the main PON port and the backup PON port of the OLT, and the main PON port and the backup PON port of the OLT are connected in the same configuration; Ensure port connection between controller and important business equipment; The ports of general business equipment are directly connected to the OLT.

2. The OLT important service guarantee system according to claim 1, characterized in that: It also includes a 1 / 2 optical splitter and a 2 / 1 optical switching switch; The input end of the 1 / 2 optical splitter is connected to the security controller, and the two output ends of the 1 / 2 optical splitter are respectively connected to the two input ends of the 2 / 1 optical switching switch, and the two output lines have different routing information; The output end of the 2 / 1 optical switching switch is connected to the port of the important business equipment.

3. The OLT important service guarantee system according to claim 1, characterized in that: The standby port is connected to the standby PON port of the adjacent site through the ODF and the outgoing optical cable of the current site and then through the ODF of the adjacent site.

4. The OLT important service guarantee system according to claim 1, characterized in that: It also includes a cloud server platform, which is connected to the security controller via a wireless transmission module.

5. An OLT important service guarantee method for the system according to any one of claims 1 to 4, characterized in that: The steps include: When using ports of different OLTs as backup PON ports, if any OLT loses power, the security controller automatically switches the important service equipment to another port of the security controller to ensure that the important service is not interrupted; The security controller detects the optical signals of the main PON port and the backup PON port of the OLT in real time. When the front-end circuit of one of the main PON port and the backup PON port fails and there is no optical signal, it automatically switches to another route to ensure that the service is not interrupted.

6. The OLT important service guarantee method according to claim 5, characterized in that: The 2 / 1 optical switching switch detects the optical signals of the two optical cable routes in real time. When there is no optical signal on the current main port, it automatically switches to the port of the other optical cable route to ensure that important services at the end are not interrupted.

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