CN110890933B - Service protection method, device, system, equipment and medium - Google Patents

Service protection method, device, system, equipment and medium Download PDF

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CN110890933B
CN110890933B CN201911339915.4A CN201911339915A CN110890933B CN 110890933 B CN110890933 B CN 110890933B CN 201911339915 A CN201911339915 A CN 201911339915A CN 110890933 B CN110890933 B CN 110890933B
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otn
abnormal
olt
odf
transmission link
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CN110890933A (en
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吴满全
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China Mobile Communications Group Co Ltd
China Mobile Group Inner Mongolia Co Ltd
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China Mobile Communications Group Co Ltd
China Mobile Group Inner Mongolia Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1652—Optical Transport Network [OTN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

Embodiments of the present invention provide a method, an apparatus, a system, a device, and a medium for service protection, which are used to improve service transmission reliability in an application scenario in which an OTN network is accessed through an optical cable network. In the service protection system, a first OTN device is connected with a first ODF frame, and a second OTN device is connected with a second ODF frame; the first OTN equipment is used for sending first abnormal alarm information to the OLT when determining that a service transmission link in the OTN subsystem is abnormal; or when determining that the main transmission link in the optical cable network subsystem is abnormal, sending second abnormal alarm information to the third OTN device; the third OTN equipment is used for switching to the second OTN equipment to transmit the service data according to the received second abnormal alarm information; and the OLT is used for switching to the standby transmission link to transmit the service data when detecting that the main transmission link is abnormal or receiving the first abnormal alarm information.

Description

Service protection method, device, system, equipment and medium
Technical Field
The present invention relates to the field of transport network technologies, and in particular, to a method, an apparatus, a system, a device, and a medium for service protection
Background
As home wide services develop towards large granules and large bandwidths, and an Optical Transport Network (OTN) converges towards an urban backbone and a township node sinks, an Optical Line Terminal (OLT) performs unified scheduling through the OTN, which becomes a common mode. Because of large home wide traffic and high bandwidth, the OLT is dispatched to a Broadband Access Server (BRAS) through a single OTN device, and needs to perform OTN unified bearer convergence at a convergence point. Moreover, with the development of family broadband services, the OTN system has already sunk to the nodes in the villages and towns, but with the development of family broadband to rural areas, and the OTN has not sunk to rural areas yet, the OTN needs to be opened by optical cables on an access layer, and then the OTN is used for unified bearing to the sink nodes in the villages and towns, so that the services need cross-network scheduling.
As shown in fig. 1, it is a schematic diagram of a network architecture in which an OLT dispatches to a BRAS through an OTN device, where an Optical cable network is responsible for accessing the OLT (C1) to an Optical Distribution Frame (ODF) in an office and accessing to a transmission network through an Optical switch box, the OTN network mainly carries large-granule services and interfaces with the Optical cable network through a service landing device (B2), a core convergence layer original service landing device (C2) interfaces with the BRAS, the service landing device is a service open device on the OTN network, and service is extended to a home broadband BRAS, and devices interfacing with the Optical cable network in the OTN network, such as a2, B2, ODF shelf a1, and a2, are in an office building.
According to the network architecture shown in fig. 1, the traffic of C1(OLT) is transmitted to the ODF device in the core convergence office building through the optical cable network, and in the core convergence office building, the traffic ports between the a1 device and the a2 device are butted by the tail fiber of the device client side port, thereby implementing the OLT traffic transmission from C1 to BRAS. However, according to the current network interface, if the optical cable network fails, or the link between a1 and a2 fails, the service is interrupted, which affects the reliability of the OLT service transmission.
Disclosure of Invention
The embodiment of the invention provides a service protection method, a device, a system, equipment and a medium, which are used for improving service transmission reliability aiming at an application scene of accessing an OTN (optical transport network) through an optical cable network.
In a first aspect, an embodiment of the present invention provides a service protection system, where the system includes an optical cable network subsystem and an optical transport network OTN subsystem, in the optical cable network subsystem, an optical line terminal OLT, a first optical distribution frame ODF frame, and a second ODF frame are connected to form a ring, in the OTN subsystem, a first OTN device, a second OTN device, and a third OTN device are connected to form a ring, the third OTN device is connected to a broadband access server BRAS, between the optical cable network subsystem and the optical transport network subsystem, the first OTN device is connected to the first ODF frame, and the second OTN device is connected to the second ODF frame; wherein:
the first OTN device is configured to send first exception warning information to the OLT when determining that a service transmission link between the first OTN device and a third OTN device in the OTN subsystem is abnormal; or when determining that the main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, sending second abnormal alarm information to the third OTN device;
the third OTN device is configured to switch to the second OTN device to transmit the service data according to the received second abnormal alarm information;
and the OLT is used for switching to a standby transmission link between the OLT and a second ODF frame to transmit service data when detecting that the main transmission link between the OLT and the first ODF frame is abnormal or receiving first abnormal alarm information.
In a second aspect, an embodiment of the present invention provides a service protection method applied in the service protection system, where the method includes:
in the service transmission process, the first OTN equipment judges whether a service transmission link between the first OTN equipment and the third OTN equipment is abnormal or not;
and if the first OTN equipment determines that a service transmission link between the first OTN equipment and the third OTN equipment in the OTN subsystem is abnormal, sending first abnormal alarm information to the OLT, wherein the first abnormal alarm information is used for triggering the OLT to switch to a standby transmission link between the OLT and a second ODF frame to transmit service data.
In a third aspect, there is provided another service protection method applied in the service protection system, including:
in the service transmission process, the first OTN equipment judges whether a main transmission link between an OLT and a first ODF in the optical cable network subsystem is abnormal or not;
and if the first OTN equipment determines that the main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, sending second abnormal alarm information to the third OTN equipment, wherein the second abnormal alarm information is used for triggering the third OTN equipment to be switched to the second OTN equipment to transmit service data.
In a fourth aspect, a service protection device is provided, which includes:
the first judging unit is used for judging whether a service transmission link between the first optical transport network OTN equipment and the third OTN equipment is abnormal or not in the service transmission process;
a first sending unit, configured to send first exception warning information to an optical line terminal OLT if the first determining unit determines that a service transmission link between the first OTN device and the third OTN device is abnormal, where the first exception warning information is used to trigger the OLT to switch to a standby transmission link between the OLT and the second optical distribution frame ODF frame to transmit service data.
In a fifth aspect, another service protection device is provided, which includes:
the second judging unit is used for judging whether a main transmission link between the OLT and the first ODF in the first OTN equipment and the optical cable network subsystem is abnormal or not in the service transmission process;
a second sending unit, configured to send second exception alarm information to the third OTN device if the second determining unit determines that the active transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, where the second exception alarm information is used to trigger the third OTN device to switch to the second OTN device to transmit service data.
In a sixth aspect, an embodiment of the present invention provides an OTN device, including: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of the first aspect of the embodiments described above.
In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the method of the first aspect in the foregoing embodiments is implemented.
According to the service protection method, the device, the system, the equipment and the medium provided by the embodiment of the invention, double-end equipment is adopted to connect between the optical cable network and the optical transmission network to form service double-uplink protection, when a link in the optical transmission network is abnormal, the OTN equipment connecting the two networks transmits link abnormity warning information to the OLT in the optical cable network, the OLT triggers service transmission link switching according to the received warning information, when the link in the optical cable network is abnormal, the OTN equipment connecting the two networks transmits the link abnormity warning information to the OTN equipment connected with the BRAS in the optical transmission network, and the OTN equipment triggers the link switching in the optical transmission network, so that the uninterrupted service transmission can be ensured, and the reliability of service transmission is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic diagram of a network architecture in the prior art in which an OLT schedules on a BRAS through an OTN device;
fig. 2 illustrates a network architecture diagram of a traffic protection system provided in accordance with some embodiments of the present invention;
fig. 3 is a schematic flow chart illustrating an implementation of a service protection method according to some embodiments of the present invention;
fig. 4 is a schematic implementation flow diagram of a service protection method according to some other embodiments of the present invention;
fig. 5 illustrates a schematic structural diagram of a service protection apparatus provided according to some embodiments of the present invention;
fig. 6 is a schematic structural diagram of a service protection device according to some other embodiments of the present invention;
fig. 7 illustrates a schematic structural diagram of an OTN device provided according to some embodiments of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In order to improve the reliability of OLT service transmission, an embodiment of the present invention provides a service protection system, as shown in fig. 2.
Fig. 2 is a schematic network architecture diagram of a service protection system according to an embodiment of the present invention. In fig. 2, the service protection system includes an optical cable network subsystem 11 and an OTN (optical transport network) subsystem 12, in the optical cable network subsystem, an OLT (optical line terminal) 110, a first ODF (optical distribution frame) rack 111 and a second ODF rack 112 are connected in a ring, in the OTN subsystem, a first OTN device 121, a second OTN device 122 and a third OTN device 123 are connected in a ring, the third OTN device 123 is connected with a BRAS (broadband access server), between the optical cable network subsystem and the optical transport network subsystem, the first OTN device 121 is connected with the first ODF rack 111, and the second OTN device 122 is connected with the second ODF rack 112.
According to the service protection system provided by the embodiment of the present invention, the optical cable network subsystem and the optical transport network subsystem are connected by a dual-end device, wherein the first ODF frame 111 is connected with the first OTN device 121 in the OTN subsystem; the second ODF shelf 112 is connected to a second OTN device 122. The first OTN device 121 and the second OTN device 122 are in a dual-node form across a core aggregation of the OTN subsystem. In the cable network subsystem, the first ODF shelf 111, the second ODF shelf 112 and the OLT 110 form a dual-add protection. In the OTN subsystem, the third OTN device 123 performs ODUK1+1SNCP (sub-network connection protection) sub-wavelength protection, and the service dual-selectively receives the first OTN device 121 and the second OTN device 122.
In specific implementation, between the optical cable Network subsystem and the OTN subsystem, the first OTN device 121 and the second OTN device 122 are respectively connected to the first ODF frame 111 and the second ODF frame 112 through a User Network Interface (UNI) of each device, and the OLT forms a dual-standard service docking mode crossing the OTN and the optical cable Network. Inside the OTN subsystem, the first OTN device 121 and the second OTN device 122 are connected to the third OTN device 123 through respective intra-network link side interfaces.
In an implementation, the service protection system provided in the embodiment of the present invention may further include a fourth OTN device 124, in this implementation, an intra-network link side interface of the second OTN device 122 is connected to the fourth OTN device 124, and is connected to the third OTN device 123 through the fourth OTN device 124, and the first OTN device 121, the second OTN device 122, the third OTN device 123, and the fourth OTN device 124 form a subnet protection ring of the OTN subsystem.
In one embodiment, the first OTN device 121 and the second OTN device 122 may be disposed in the same office building, and the third OTN device 123 may be disposed in a convergence layer of the OTN subsystem.
According to the service protection system provided by the embodiment of the present invention, services are configured on the optical cable network subsystem and the OTN subsystem docking devices, that is, the first ODF frame 111, the second ODF frame 112, the first OTN device 121, and the second OTN device 122, wherein an ODUK1+1SNC dual-transmission selective reception service is configured on the third OTN device 123 in the OTN subsystem, similarly, an ODUK1+1SNC direct service is configured on the first OTN device 121 of the service master termination point, a User Network Interface (UNI) thereof is connected to the first ODF frame 111, an ODUK1+1SNC direct service is configured on the second OTN device 122, and a User Network Interface (UNI) thereof is connected to the second ODF frame 112, so that the second OTN device 122 is a standby docking point.
In the optical cable network subsystem, the OLT is connected to the first OTN device 121 and the second OTN device 122 through dual uplink connections, and the OLT implements active/standby switching through Link Aggregation (LAG) protection.
According to the embodiment of the present invention, in an implementation manner, since the OLT is connected to the user network interface of the first OTN device 121 through the optical cable network subsystem, in order to implement triggering of switching of the internal service transmission link of the OTN subsystem by a failure of the user network interface, in a specific implementation, an alarm field is added to a service frame transmitted between a UNI interface of the OTN device (including the first OTN device and the second OTN device) and an intranet link side interface, so as to implement reverse notification of alarm information, that is, when the UNI determines that the service transmission link in the optical cable network subsystem is abnormal, the intranet link side interface is notified through the alarm field, the intranet link side interface continues to transmit to the third OTN device 123, and a function of identifying the alarm field and triggering of performing primary/standby switching needs to be added in ODUK1+1SNC length 1+1 protection of the OTN subsystem. After receiving the alarm information, the third OTN device 123 switches to a standby link (i.e., a link with the second OTN device) to transmit service data.
In another embodiment, when a fault occurs in the OTN subsystem, since the fault information cannot be transmitted to the OLT, when the active link between the third OTN device 123 and the first OTN device 121 is abnormal, the first OTN device 121 cannot transmit the alarm information of the link interruption to the OLT through the UNI interface, and in this case, the OLT still receives the service data from the first OTN device 121 and causes service interruption, in order to solve this problem, in the embodiment of the present invention, it is necessary to implement transmission of the alarm information of the intra-network link side interface to the UNI interface in the OTN subsystem, and similarly, an alarm field may be added in the service frame transmitted between the intra-network link side interface and the UNI, so as to transmit the abnormal alarm information to the UNI through the alarm field, and then the UNI transmits the alarm information to the OLT in the optical cable network subsystem, and after receiving the abnormal alarm information, and switching to a standby link through the LAG protection of the first ONT equipment, namely, a link between the first ONT equipment and the second ODF frame, and transmitting service data through the second ONT equipment and the OTN subsystem, thereby realizing the protection of service transmission.
Based on this, in the service protection system provided in the embodiment of the present invention:
the first OTN device 121 is configured to send first exception warning information to the OLT 110 when determining that a service transmission link between the OTN subsystem 12 and the third OTN device 123 is abnormal; or when determining that the active transmission link between the OLT 110 and the first ODF rack 111 in the optical cable network subsystem 11 is abnormal, send second abnormal alarm information to the third OTN device 123.
The third OTN device 123 is configured to switch to the second OTN device 122 to transmit the service data according to the received second abnormal alarm information.
The OLT 110 is configured to switch to a standby transmission link between the second ODF rack 112 and transmit service data when detecting that the active transmission link between the OLT and the first ODF rack 111 is abnormal or receiving first abnormal alarm information.
In specific implementation, the first OTN device 121 is configured to determine, through the intra-network link side interface, that a service transmission link between the OTN subsystem and the third OTN device is abnormal; determining that a main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal through the UNI interface; and when the UNI interface determines that a main transmission link between an OLT and a first ODF in the optical cable network subsystem is abnormal, the UNI interface sends second abnormal alarm information to the intra-network link side interface, the intra-network link side interface sends second abnormal alarm information to the third OTN equipment, when the intra-network link side interface determines that a service transmission link between the intra-OTN subsystem and the third OTN equipment is abnormal, the intra-network link side interface sends first abnormal alarm information to the UNI, and the UNI interface sends first abnormal alarm information to the OLT.
In an embodiment, when a link between the first ODF frame 111 and the OLT in the optical cable network is abnormal, the first OTN device 121 detects that service data transmission at the interface side of the user network fails, determines that the link between the first ODF frame 111 and the OLT is abnormal, an alarm field in a service frame interacting with the interface at the link side in the network carries abnormal alarm information, the interface at the link side in the network sends the abnormal alarm information to the third OTN device 123, and the third OTN device starts service switching after receiving the abnormal alarm information, switches to the second OTN device to transmit service data, including selectively receiving service data sent from the direction of the second OTN device, and sends service data to the OLT in the optical cable network subsystem through the second OTN device. Because the link between the first ODF frame 111 and the OLT is abnormal, the OLT switches to the standby transmission link through the LAG protection, that is, the transmission link between the OLT and the second ODF frame transmits the service data, so that the normal transmission of the service data between the OLT and the third OTN device can be ensured.
In another embodiment, when the main transmission link in the OTN subsystem 12, i.e. the transmission link between the first OTN device and the third OTN device, is abnormal, because the third OTN device is configured with the dual-transmission selective-reception service, when the third OTN device detects that the service transmission link between itself and the first OTN device is abnormal, it switches to the standby transmission link, namely, the service transmission link between the third OTN device and the second OTN device transmits the service data, and receives the service data sent by the second OTN device from the backup transmission link, and when the intra-network link side interface of the first OTN equipment detects that the transmission link is abnormal, transmitting abnormal alarm information to the UNI through a service frame interacted with the UNI, transmitting the abnormal alarm information to the OLT of the optical cable network subsystem by the UNI, triggering the OLT to switch to a standby transmission link through LAG protection, namely transmitting service data on the transmission link between the OLT and the second ODF frame. Therefore, normal transmission of service data between the OLT and the third OTN equipment is ensured.
In another embodiment, if the first OTN device itself fails, in this embodiment, the third OTN device detects that a service transmission link between the third OTN device and the first OTN device fails, and triggers performing ODUK1+1SNC sub-wavelength 1+1 protection switching in the OTN subsystem to switch to a protection timeslot in a direction of a fourth OTN device, and the protection timeslot reaches the second OTN device through the fourth OTN device, and the second OTN device sends the received service data to the UNI interface and sends the service data to the second ODF rack through the UNI interface, and when the first ODF rack connected to the UNI interface of the first OTN device detects that the transmission link between the first OTN device and the second OTN device is abnormal, the OLT is triggered to perform LAG switching to a backup transmission link, that is, the transmission link between the OLT and the second ODF rack transmits the service data, thereby ensuring normal transmission of the service data between the third OTN device and the OLT.
In specific implementation, when the second OTN device fails, the transmission of the service data on the active link is not affected by this situation, and therefore, service switching is not triggered, and the service data is normally transmitted through the active transmission link.
In summary, according to the service system provided in the embodiment of the present invention, by adjusting the network architecture, the mode of interconnecting the single-side optical cable of the OLT and the single-device single port is changed into the mode of interconnecting dual devices in dual uplink, so that dual-node and dual uplink protection is implemented, and a corresponding service configuration method is provided without implementing dual uplink linkage switching. In the OTN subsystem, an alarm is transferred to the OLT and an OTN client side alarm triggers the ODUK1+1SNC protection switching.
In the existing network, the optical cable network subsystem protection and the OTN subsystem protection are independent and have no relevance, which causes that the in-network fault of the OTN in the dual uplink protection cannot be transmitted into the OLT network, the fault in the OTN network cannot inform the OLT of corresponding switching, so that the service connection protection cannot be realized, and similarly, the fault information in the OLT network cannot be transmitted into the OTN network, and the connection switching cannot be realized. In view of this, in the embodiment of the present invention, the link abnormal alarm in the OTN network is transmitted to the UNI port of the OTN device and is transmitted to the OLT network to implement the switching. The method comprises the steps of transmitting faults in an OLT network to a client side UNI port of an OTN, triggering a conventional OTNODUK 1+1SNC protection switching triggering condition by a single ODUK line side failure alarm, increasing the main-standby switching of the OTNODUK 1+1SNC protection switching triggered by the abnormal alarm reverse feedback of the client network interface, and triggering the OTNODUK 1+1SNC protection switching by fault information in the OLT network to perform corresponding switching actions, thereby realizing service protection. The protection switching under various fault scenes in the OLT and the OTN is realized through the triggering and linking mode of the protection switching, the protection of the service is realized, and the reliability of service transmission is improved.
Based on the same technical concept, an embodiment of the present invention further provides a service protection method applied to the service protection system, as shown in fig. 3, which is an implementation flow diagram of the service protection method provided in the embodiment of the present invention, and the implementation flow diagram may include the following steps:
and S31, in the service transmission process, the first OTN equipment judges whether the service transmission link between the first OTN equipment and the third OTN equipment is abnormal.
And S32, if the first OTN device determines that the service transmission link between the OTN subsystem and the third OTN device is abnormal, sending first abnormal alarm information to the OLT.
The first abnormal alarm information is used for triggering the OLT to switch to a standby transmission link between the OLT and a second ODF frame to transmit service data.
The method for determining whether a service transmission link between the first OTN device and the third OTN device is abnormal includes:
and the first OTN equipment detects whether a service transmission link between the first OTN equipment and the third OTN equipment in the OTN subsystem is abnormal or not through the in-network link side interface.
As shown in fig. 4, which is a schematic flow chart of an implementation of another service protection method provided in the embodiment of the present invention, the implementation may include the following steps:
and S41, in the service transmission process, the first OTN device judges whether the main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal.
S42, if the first OTN device determines that the active transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, send second abnormal alarm information to the third OTN device.
And the second abnormal alarm information is used for triggering the third OTN equipment to be switched to the second OTN equipment to transmit service data.
The determining, by the first OTN device, whether an active transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal specifically includes:
and the first OTN equipment judges whether a main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal or not through the UNI interface.
Based on the same technical concept, an embodiment of the present invention further provides a service protection device, as shown in fig. 5, including:
a first determining unit 51, configured to determine whether a service transmission link between the first optical transport network OTN device and the third OTN device is abnormal in a service transmission process;
a first sending unit 52, configured to send first exception warning information to an optical line terminal OLT if the first determining unit determines that a service transmission link between the first OTN device and the third OTN device is abnormal, where the first exception warning information is used to trigger the OLT to switch to a standby transmission link between the second optical distribution frame and the ODF frame to transmit service data.
In an embodiment, the first determining unit 51 is specifically configured to detect, through the intra-network link side interface, whether a service transmission link between the OTN subsystem and a third OTN device is abnormal.
Based on the same technical concept, an embodiment of the present invention further provides another service protection device, as shown in fig. 6, which may include:
a second determining unit 61, configured to determine whether a main transmission link between the OLT and the first ODF in the optical cable network subsystem and the first OTN device is abnormal in a service transmission process;
a second sending unit 62, configured to send second exception alarm information to the third OTN device if the second determining unit determines that the active transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, where the second exception alarm information is used to trigger the third OTN device to switch to the second OTN device to transmit service data.
The second determining unit 61 is specifically configured to determine, through the UNI interface, whether a main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal.
In addition, the service protection method of the embodiment of the present invention described in conjunction with fig. 3 and 4 may be implemented by the ONT device. Fig. 7 shows a hardware structure diagram of an OTN device provided in an embodiment of the present invention.
The OTN device may include a processor 701 and a memory 702 storing computer program instructions.
Specifically, the processor 701 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing an embodiment of the present invention.
Memory 702 may include a mass storage for data or instructions. By way of example, and not limitation, memory 702 may include a Hard Disk Drive (HDD), a floppy Disk Drive, flash memory, an optical Disk, a magneto-optical Disk, tape, or a Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 702 may include removable or non-removable (or fixed) media, where appropriate. The memory 702 may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory 702 is non-volatile solid-state memory. In a particular embodiment, the memory 702 includes Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or a combination of two or more of these.
The processor 701 may implement any of the service protection methods in the above embodiments by reading and executing computer program instructions stored in the memory 702.
In one example, the OTN device may also include a communication interface 703 and a bus 710. As shown in fig. 7, the processor 701, the memory 702, and the communication interface 703 are connected by a bus 710 to complete mutual communication.
The communication interface 703 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiment of the present invention.
The bus 710 comprises hardware, software, or both to couple the components of the OTN device to one another. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 710 may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
In addition, in combination with the service protection method in the foregoing embodiment, an embodiment of the present invention may provide a computer-readable storage medium to implement. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the service protection methods in the above embodiments.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.

Claims (13)

1. A service protection system is characterized in that the system comprises an optical cable network subsystem and an Optical Transport Network (OTN) subsystem, wherein an Optical Line Terminal (OLT), a first Optical Distribution Frame (ODF) frame and a second ODF frame are connected into a ring in the optical cable network subsystem, first OTN equipment, second OTN equipment and third OTN equipment are connected into a ring in the OTN subsystem, the third OTN equipment is connected with a broadband access server (BRAS), the first OTN equipment is connected with the first ODF frame, and the second OTN equipment is connected with the second ODF frame between the optical cable network subsystem and the optical transport network subsystem; wherein:
the first OTN device is configured to send first exception warning information to the OLT when determining that a service transmission link between the first OTN device and a third OTN device in the OTN subsystem is abnormal; or when determining that the main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, sending second abnormal alarm information to the third OTN device;
the third OTN device is configured to switch to the second OTN device to transmit the service data according to the received second abnormal alarm information;
and the OLT is used for switching to a standby transmission link between the OLT and a second ODF frame to transmit service data when detecting that the main transmission link between the OLT and the first ODF frame is abnormal or receiving first abnormal alarm information.
2. The system of claim 1, wherein the OTN subsystem further comprises a fourth OTN device, and the first OTN device, the second OTN device, the third OTN device and the fourth OTN device constitute a subnet protection ring of the OTN subsystem;
the third OTN device is further configured to switch to the service transmission link between the fourth OTN device and the second OTN device to transmit service data when the first OTN device fails;
the first ODF rack is further configured to trigger the OLT to switch to a second ODF rack to transmit service data when detecting that the first OTN device fails.
3. The system of claim 1, wherein the first OTN device is connected to the first ODF shelf via a user network interface, UNI, and to a third OTN device via an intra-network link-side interface;
the first OTN device is specifically configured to determine, through the intra-network link side interface, that a service transmission link between the first OTN device and a third OTN device in the OTN subsystem is abnormal; and determining the abnormality of the main transmission link between the OLT and the first ODF in the optical cable network subsystem through the UNI interface.
4. The system of claim 3,
the first OTN device is specifically configured to send, by the UNI interface, second abnormality warning information to the intra-network link side interface when the UNI interface determines that the main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, and send, by the intra-network link side interface, second abnormality warning information to the third OTN device.
5. The system of claim 3,
the first OTN device is specifically configured to send, by the intra-network link side interface, first abnormal alarm information to the UNI when the intra-network link side interface determines that a service transmission link between the first OTN device and a third OTN device in the OTN subsystem is abnormal, and send, by the UNI interface, first abnormal alarm information to the OLT.
6. A service protection method applied to the system of any claim 1 to 5, comprising:
in the service transmission process, the first OTN equipment judges whether a service transmission link between the first OTN equipment and the third OTN equipment is abnormal or not;
and if the first OTN equipment determines that a service transmission link between the first OTN equipment and the third OTN equipment in the OTN subsystem is abnormal, sending first abnormal alarm information to the OLT, wherein the first abnormal alarm information is used for triggering the OLT to switch to a standby transmission link between the OLT and a second ODF frame to transmit service data.
7. The method of claim 6, wherein the first OTN device is connected to the first ODF shelf via a User Network Interface (UNI) and to a third OTN device via an intra-network link-side interface; the first OTN device determines whether a service transmission link between itself and the third OTN device is abnormal, and specifically includes:
and the first OTN equipment detects whether a service transmission link between the first OTN equipment and the third OTN equipment in the OTN subsystem is abnormal or not through the in-network link side interface.
8. A service protection method applied to the system of any claim 1 to 5, comprising:
in the service transmission process, the first OTN equipment judges whether a main transmission link between an OLT and a first ODF in the optical cable network subsystem is abnormal or not;
and if the first OTN equipment determines that the main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, sending second abnormal alarm information to the third OTN equipment, wherein the second abnormal alarm information is used for triggering the third OTN equipment to be switched to the second OTN equipment to transmit service data.
9. The method of claim 8, wherein the first OTN device is connected to the first ODF shelf via a user network interface, UNI, and to a third OTN device via an intra-network link-side interface; the first OTN device determines whether an active transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, and specifically includes:
and the first OTN equipment judges whether a main transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal or not through the UNI interface.
10. A traffic protection device, comprising:
the first judging unit is used for judging whether a service transmission link between the first optical transport network OTN equipment and the third OTN equipment is abnormal or not in the service transmission process;
a first sending unit, configured to send first exception warning information to an optical line terminal OLT if the first determining unit determines that a service transmission link between the first OTN device and the third OTN device is abnormal, where the first exception warning information is used to trigger the OLT to switch to a standby transmission link between the OLT and the second optical distribution frame ODF frame to transmit service data.
11. A traffic protection device, comprising:
the second judging unit is used for judging whether a main transmission link between the OLT and the first ODF in the first OTN equipment and the optical cable network subsystem is abnormal or not in the service transmission process;
a second sending unit, configured to send second exception alarm information to a third OTN device if the second determining unit determines that the active transmission link between the OLT and the first ODF in the optical cable network subsystem is abnormal, where the second exception alarm information is used to trigger the third OTN device to switch to the second OTN device to transmit service data.
12. An OTN device, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of claims 6-9.
13. A computer-readable storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 6-9.
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