WO2015131360A1 - 一种链路切换方法、设备和系统 - Google Patents

一种链路切换方法、设备和系统 Download PDF

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Publication number
WO2015131360A1
WO2015131360A1 PCT/CN2014/072935 CN2014072935W WO2015131360A1 WO 2015131360 A1 WO2015131360 A1 WO 2015131360A1 CN 2014072935 W CN2014072935 W CN 2014072935W WO 2015131360 A1 WO2015131360 A1 WO 2015131360A1
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WO
WIPO (PCT)
Prior art keywords
link
sub
network unit
optical network
message
Prior art date
Application number
PCT/CN2014/072935
Other languages
English (en)
French (fr)
Inventor
杨鹤
汪伊明
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2016555480A priority Critical patent/JP6379213B2/ja
Priority to MYPI2016703222A priority patent/MY173360A/en
Priority to KR1020167027223A priority patent/KR101952224B1/ko
Priority to ES14879257.5T priority patent/ES2634242T3/es
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP14879257.5A priority patent/EP2942882B1/en
Priority to CA2941538A priority patent/CA2941538C/en
Priority to CN201480000223.6A priority patent/CN105103475B/zh
Priority to MX2016011446A priority patent/MX356522B/es
Priority to PCT/CN2014/072935 priority patent/WO2015131360A1/zh
Priority to BR112016020404-2A priority patent/BR112016020404B1/pt
Priority to AU2014385716A priority patent/AU2014385716B2/en
Priority to RU2016139014A priority patent/RU2633527C1/ru
Priority to US14/837,977 priority patent/US10129617B2/en
Publication of WO2015131360A1 publication Critical patent/WO2015131360A1/zh
Priority to PH12016501737A priority patent/PH12016501737A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q11/0067Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06Management of faults, events, alarms or notifications
    • H04L41/0654Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0659Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/08Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0817Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/10Active monitoring, e.g. heartbeat, ping or trace-route
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/22Alternate routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/28Routing or path finding of packets in data switching networks using route fault recovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06Management of faults, events, alarms or notifications
    • H04L41/0654Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/08Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0081Fault tolerance; Redundancy; Recovery; Reconfigurability

Definitions

  • the present invention relates to the field of communications, and in particular, to a link switching method, device, and system.
  • the dual-homing protection of the network device node is to connect one network node to two different network devices in another network area through the active and standby two links, and improve the network reliability by mutual backup protection of the active and standby links.
  • Network data backup method In the prior art, the extension line TYPE B and TYPE C/TYPE D protection technologies are generally used to implement dual-homing protection of nodes.
  • TYPE B protects the primary and backup PON ports of the OLT, and the primary and backup fibers implement network data backup, while the TYPE C/TYPE D passes through the OLT dual PON port, the ONU dual PON port, the backbone fiber, the optical splitter, and Wiring fibers are dual-channel redundant to achieve network data backup.
  • the specific implementation of TYPE C/TYPE D includes two types of PON port protection between different PON MAC chips and PON boards in the same PON board.
  • the prior art provides a VLAN-based Ethernet linear protection switching mechanism, that is, G.803 1 , and the protection switching mechanism is implemented by an APS (Automatic Protection Switching) protocol.
  • the APS protocol is a protocol that maintains the consistency of the switching results of the devices at both ends in the bidirectional protection switching, as specified in G.803.
  • the APS protocol packets can only be sent on the protection channel and cannot be transmitted on the working channel.
  • the segmentation protection scheme protected by G.803 1 and TYPE B/C is used to implement network data backup, that is, the OLT to CP uses G.803 1 to implement OLT GE uplink dual-homing protection, using G. 803 1 VLAN service channel protection to protect the end-to-end service path.
  • the PON network uses the TYPE B and TYPE C dual-homing protection schemes to utilize the link level protection of the PON to the PON backbone fiber, thereby realizing the backup of network data.
  • VLAN X is the primary service channel
  • VLAN Y is the backup service channel.
  • the service is switched to the alternate service channel VLAN Y to ensure that the services accessed on the ONT are normal.
  • the other OLT is protected by the dual-homed TYPE B as the standby OLT, and the PON port between the standby OLT and the ONT is opened, and the service on the ONT corresponding to the failed PON is allowed.
  • the standby OLT accesses the network.
  • the backup OLT cannot perform the protection switching of the VLAN of the G.803 1 and the OLT uplink Switch link service level interruption cannot be notified.
  • the service PON side linkage switching cannot be implemented.
  • the PON network interruption cannot be associated with the uplink CP side link switching, which causes the ONT access service to be interrupted. Therefore, the OLT uplink segmentation protection scheme is used because The protection scheme is inconsistent, the user deployment is complex, and the end-to-end switching behavior of the system is unpredictable. It is impossible to quickly implement real end-to-end service level fast switching across devices.
  • the embodiments of the present invention provide a link switching method, device, and system, and provide a link switching mechanism, which implements fast linkage switching of links between devices.
  • an optical network unit configured to exchange equipment with the aggregation side by using the first maintenance entity port
  • the first link is monitored by transmitting a monitoring packet on the first link of the connection;
  • the first link includes a first sub-link between the optical network unit and the first optical line terminal, a second sub-link between the first optical line terminal and the convergence side switching device;
  • a switching unit configured to switch a first sub-link of the first link to a first sub-link of the second link, where the second link is detected, if a link failure occurs on the first link
  • the first sub-link of the second link is the optical network unit and the second light
  • the second sub-link of the second link is the link between the optical network unit and the aggregation-side switching device.
  • a link between line terminals a sending unit, configured to send an advertisement message to the second optical line terminal, where the notification message is used to notify the second optical line terminal of a link switch and a reason for the switch, so that the second optical line terminal turns on the transmission port;
  • the sending unit is further configured to send, by using the second maintenance entity port, an automatic protection switching message to the aggregation side switching device on the second link, where the automatic protection switching message is used to notify the aggregation side switching device to generate Link switching, so that the aggregation side switching device switches the second sub-link of the first link to the second sub-link of the second link after receiving the automatic protection switching message;
  • the second sub-link of the second link is a link between the aggregation-side switching device and the second optical line terminal.
  • the link failure of the first link includes: the first sublink failure of the first link, the downlink fault of the second sublink of the first link, and the first link of the first link
  • the uplink of the two sub-links is faulty;
  • the downlink direction is a direction in which the service data is transmitted from the aggregation side switching device to the first optical line terminal; the second sublink of the first link is in an uplink direction; the uplink direction The direction in which the service data is transmitted from the aggregation side switching device of the first optical line terminal box.
  • the maintenance unit is further configured to:
  • the link failure of the first link is a first sublink failure of the first link and a downlink fault of a second sublink of the first link.
  • the announcement message is a physical layer maintenance management cell.
  • the sending unit is further configured to:
  • the attribute change notification message is used to notify the first optical line terminal of a link link switchover and a handover cause.
  • the optical network unit Before the monitoring unit acquires the link fault information of the first link by using the monitoring packet, the optical network unit further includes a receiving unit, where the receiving unit is configured to:
  • an aggregation side switching device where the aggregation side switching device includes:
  • a monitoring unit configured to monitor, by using a first maintenance entity port, a monitoring packet by transmitting a monitoring packet on a first link connected to the optical network unit;
  • the first link includes the optical network unit and a first sub-link between the first optical line terminals, and a second sub-link between the first optical line terminal and the convergence side switching device;
  • a receiving unit configured to receive an automatic protection switching message that is sent by the optical network unit on the second link by using a second maintenance entity port, where the automatic protection switching message is used to notify the aggregation side switching device to generate a link Switch
  • a switching unit configured to: after receiving the automatic protection switching message, switch a second sub-link of the first link to a second sub-link of the second link;
  • the second sub-link of the link is a link between the aggregation-side switching device and the second optical line terminal.
  • the link failure of the first link includes: the first sublink of the first link The failure of the second sublink in the downlink direction of the first link and the uplink failure of the second sublink of the first link;
  • the downlink direction is a direction in which the service data is transmitted from the aggregation side switching device to the first optical line terminal; the second sublink of the first link is in an uplink direction; the uplink direction The direction in which the service data is transmitted from the aggregation side switching device of the first optical line terminal box.
  • the monitoring unit is further configured to: obtain, by the monitoring packet, the link failure of the first link, the link failure of the first link, and the downlink of the second link of the first link.
  • Direction failure
  • the switching unit is further configured to switch the service data transmission repeatedly between the second sublink of the second link and the second sublink of the first link at a preset frequency; After the optical network unit receives the automatic protection switching message, the switching unit stops switching;
  • the aggregation side switching device further includes a sending unit, where the sending unit is configured to transmit, in the switching unit, the service data on the second sublink of the second link and the second sublink of the first link After the links are switched, the automatic protection switching message is sent to the optical network unit by using a link that does not perform service data transmission.
  • a third aspect provides a link switching system, where the link switching system includes at least two optical line terminals, and the link switching system further includes the optical network unit of the first aspect and the convergence side of the second aspect. Switching equipment.
  • a fourth aspect provides a link switching method, where the method includes:
  • the optical network unit monitors the first link by transmitting a monitoring packet on the first link of the optical network unit and the aggregation side switching device by using the first maintenance entity port;
  • the first link includes the a first sub-link between the optical network unit and the first optical line terminal, and a second sub-link between the first optical line terminal and the convergence side switching device; If the link failure of the first link is detected, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link, where the second The link is a link between the optical network unit and the aggregation side switching device except the first link, and the first sub-link of the second link is the optical network unit and the second a link between optical line terminals;
  • the optical network unit sends an advertisement message to the second optical line terminal, where the advertisement message is used to notify the second optical line terminal of a link switch and a reason for the switch, so that the second optical line terminal turns on the transmission port;
  • the optical network unit sends an automatic protection switching message to the aggregation side switching device on the second link by using the second maintenance entity port, where the automatic protection switching message is used to notify the aggregation side switching device to generate a link.
  • the aggregation side switching device switches the second sublink of the first link to the second sublink of the second link after receiving the automatic protection switching message;
  • the second sub-link of the second link is a link between the aggregation-side switching device and the second optical line terminal.
  • the first link generating a link fault includes:
  • the first sub-link of the first link is faulty; the first sub-link fault of the first link is a link fault of the optical network unit detecting side;
  • the second sublink of the first link is in a downlink direction;
  • the downlink direction is a direction in which the service data is transmitted from the aggregation side switching device to the first optical line terminal;
  • the downlink fault of the second sub-link is a fault of the link detected by the optical network unit;
  • the second sublink of the first link is in an uplink direction; the uplink direction is a direction in which the service data is transmitted from the convergence side switching device of the first optical line terminal box, the first link
  • the uplink fault of the second sub-link is the fault of the link detected by the side-switching device.
  • the notification message is The physical layer maintains management cells.
  • the link fault is a downlink fault of the second sublink of the first link
  • the notification The message is a port tracking message, and after the service data transmission is successfully switched to the first sub-link of the second link, the method further includes:
  • the optical network unit sends an attribute change notification to the first optical line terminal; the attribute change notification message is used to notify the first optical line terminal of a link link switchover and a switch cause.
  • the notification The message is a port tracking message
  • the method further includes: before the optical network unit acquires the link fault information of the first link by using the monitoring data, the method further includes:
  • the service data transmission is repeated at a preset frequency on the second sub-link of the second link and the second sub-chain of the first link. Switching between the roads to transmit the automatic protection switching message to the optical network unit by using a link that does not perform service data transmission; until the optical network unit receives the automatic protection switching message, the convergence side The switching device stops switching.
  • the embodiment of the present invention provides a link switching method, device, and system, where an optical network unit transmits a monitoring packet to the first link that is connected to the optical network unit and the aggregation side switching device by using the first maintenance entity port.
  • the first link is monitored; if the link failure occurs on the first link, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link a link; the optical network unit sends an advertisement message to the second optical line terminal, so that the second optical line terminal turns on the transmission port; the optical network unit is on the second link by using the second maintenance entity port
  • the aggregation side switching device sends an automatic protection switching cancellation, so that the aggregation side switching device switches the second sub-link of the first link to the second after receiving the automatic protection switching message.
  • the second sublink of the link Therefore, a link switching mechanism is provided, which implements fast linkage switching of links between devices.
  • FIG. 1 is a schematic flowchart of a link switching method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of another link switching method according to an embodiment of the present invention
  • FIG. 3 is a schematic flow chart of another link switching method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of another link switching method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of another link switching method according to an embodiment of the present invention.
  • FIG. 6 is a schematic flow chart of another link switching method according to an embodiment of the present invention.
  • FIG. 7 is a schematic flow chart of another link switching method according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an optical network unit according to an embodiment of the present invention
  • FIG. 9 is a schematic structural diagram of another optical network unit according to an embodiment of the present invention
  • FIG. 10 is a convergence side according to an embodiment of the present invention
  • Schematic diagram of the structure of the switching device
  • FIG. 11 is a schematic structural diagram of another aggregation side switching device according to an embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of another optical network unit according to an embodiment of the present disclosure
  • FIG. 13 is a schematic structural diagram of another aggregation side switching device according to an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a link switching method, as shown in FIG. 1 , the method includes:
  • the optical network unit monitors the first link by transmitting a monitoring packet on the first link of the optical network unit and the aggregation side switching device by using the first maintenance entity port; the first link includes the optical network unit and the first link. a first sub-link between the optical line terminals, a second sub-link between the first optical line terminal and the convergence side switching device.
  • the optical network unit switches the first sub-link of the first link to the first sub-link of the second link, and the second link is an optical network unit.
  • the first sub-link of the second link is a link between the optical network unit and the second optical line terminal, and the link between the optical network unit and the second optical line terminal.
  • the optical network unit sends an advertisement message to the second optical line terminal, where the notification message is used to notify the second optical line terminal of a link switch and a reason for the switch, so that the second optical line terminal turns on the transmission port.
  • the optical network unit sends an automatic protection switching message to the aggregation side switching device on the second link by using the second maintenance entity port, and the automatic protection switching message is used to notify the aggregation side switching device to perform link switching, so that the aggregation side switching device is in the After receiving the automatic protection switching message, the second sub-link of the first link is switched to the second sub-link of the second link; the second sub-link of the second link is the aggregation-side switching device and the second Optical line terminal The link between.
  • the embodiment of the present invention provides a link switching method, where an optical network unit transmits a monitoring packet to the first link on a first link that is connected to the optical network unit and the aggregation side switching device by using the first maintenance entity port. Performing monitoring; if it is detected that a link failure occurs on the first link, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link; Transmitting, by the optical network unit, an announcement message to the second optical line terminal, so that the second optical line terminal opens the transmission port; the optical network unit is on the second link to the convergence side through the second maintenance entity port
  • the switching device sends an automatic protection switching, so that the aggregation side switching device switches the second sub-link of the first link to the second link after receiving the automatic protection switching message The second sub-link. Therefore, a link switching mechanism is provided, which implements fast linkage switching of links between devices.
  • the link fault is a fault of the link between the optical network unit and the optical line terminal.
  • the optical network unit is represented as an ONU (Optical Network Unit)
  • the aggregation side switching device is represented as a CP Switch.
  • the optical line terminal is represented as an OLT (Optical Line Terminal), wherein the first optical line terminal is 0LT 1 and the second optical line terminal is 0LT2, which is a chain provided by the embodiment of the present invention.
  • the road switching method includes at least two OLTs.
  • the embodiment takes two as an example. As shown in FIG. 2, the method includes:
  • the ONU monitors the first link by transmitting a monitoring packet on the first link of the 0NU and the CP Switch through the first maintenance entity port.
  • the monitoring information can be CCM (Continuity Check Message), and the maintenance association end point (MEP) is set on the ONU so that the CCM passes through the MEP between the ONU and the CP Switch.
  • the link between the links corresponding to one MEP is transmitted.
  • the 0NU and the CP Switch simultaneously monitor the link by using the CCM. Control.
  • the ONU uses the CCM to acquire a link fault between the optical network unit and the optical line terminal.
  • the link between the ONU and the OLT 1 is faulty, wherein the first MEP of the ONU passes the link between the OLT 1 and the CP Switch as the first link, and the ONU and the OLT 1
  • the link between the OLT 1 and the CP Switch is the second sub-link of the first link, and the second MEP of the ONU passes between the OLT 2 and the CP Switch.
  • the link is the second link
  • the link between the ONU and the OLT2 is the first sub-link of the second link
  • the link between the OLT2 and the CP switch is the second sub-link of the second link
  • the ONU uses the CCM to detect that the first sub-link of the first link between the ONU and the OLT 1 fails, and acquires the location of the faulty link and the fault information.
  • the failure information may include a cause of the failure or the like.
  • the ONU and the OLT are connected to each other through a splitter, and the OLT and the CP Switch also contain various types of devices.
  • the wiring in the figure is merely illustrative.
  • the ONU evaluates a fault of the link between the ONU and the OLT 1.
  • the link failure of the ONU detection side may be caused by an error message during the CCN transmission process
  • the CCM needs to contact the ONU and the OLT 1 If the link fails, it is confirmed that the link failure is a failure between the ONU and the OLT 1.
  • the ONU switches the first sub-link of the first link to the first sub-link of the second link.
  • the ONU switches the link between the ONU corresponding to the first MEP and the OLT 1 to the link between the ONU and the OLT 2, that is, switches the first sub-link of the first link to the first link of the second link. Sublink.
  • the ONU sends an announcement message to the OLT2.
  • the message may be a PLOAM (Physical Layer Operation Administration and Maintenance) message.
  • the PLOAM is used to inform the OLT 2 to open the port. 206. After the port is opened by the OLT2, the ONU sends an automatic protection switching message to the CP Switch.
  • the automatic protection switching message may be an APS (Automatic Protection Switching) message, and the APS message is used to notify the CP Switch of a link switch.
  • APS Automatic Protection Switching
  • the CP switch switches the second sub-link of the first link to the second sub-link of the second link.
  • the CP Switch switches the link between the OLT 1 and the CP Switch to
  • the link between OLT2 and the CP Switch Thereby switching the service data transmission from the first link to the second link is achieved.
  • the embodiment of the present invention provides a link switching method, where an optical network unit transmits a monitoring packet to the first link on a first link that is connected to the optical network unit and the aggregation side switching device by using the first maintenance entity port. Performing monitoring; if it is detected that a link failure occurs on the first link, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link; Transmitting, by the optical network unit, an announcement message to the second optical line terminal, so that the second optical line terminal opens the transmission port; the optical network unit is on the second link to the convergence side through the second maintenance entity port
  • the switching device sends an automatic protection switching, so that the aggregation side switching device switches the second sub-link of the first link to the second link after receiving the automatic protection switching message Two sub-links. Therefore, a link switching mechanism is provided, which implements fast linkage switching of links between devices.
  • the present invention further provides a link switching method.
  • a link failure is assumed to be a downlink fault of the second sublink of the first link, which is the same as the previous embodiment.
  • the network unit is represented as 0NU
  • the aggregation side switching device is represented as a CP Switch
  • the optical line terminal is represented as 0LT, wherein the first optical line terminal is 0LT1 and the second optical line terminal is 0LT2.
  • a link switching method is provided to include at least two OLTs.
  • the present embodiment takes two as an example. As shown in FIG. 4, the method includes:
  • the 0NU is connected to the CP Switch at the 0NU through the first maintenance entity port.
  • the first link is monitored by transmitting a monitoring packet on the first link.
  • this step is the same as 201 in the previous embodiment, and is not described here.
  • the ONU uses the CCM to obtain the fault of the link between the CP Switch and the OLT 1.
  • the downlink between the OLT 1 and the CP Switch fails.
  • the first link, the first sub-link of the first link, the second sub-link of the first link, the second link, the first sub-link of the second link, and the second link The definition of the second sub-link is the same as that of the previous embodiment, and will not be described here.
  • the ONU uses the CCM to detect that the downlink of the first sublink of the first link between the OLT 1 and the CP switch fails, and acquires the location of the faulty link and the fault information.
  • the fault information may include the cause of the fault, and the like.
  • the ONU evaluates a fault of the link between the ONU and the OLT 1.
  • this step is the same as 203 in the previous embodiment, and is not described here.
  • the ONU switches the first sub-link of the first link to the first sub-link of the second link.
  • this step is the same as 204 in the previous embodiment, and is not described here.
  • the ONU sends an announcement message to the OLT2.
  • the message may be a PST (PON Section Trace) message.
  • PST PON Section Trace
  • This PST message is used to inform 0LT2 to open the port.
  • the 0NU sends an AVC (Attribute Value Change) message to the 0LT 1.
  • AVC Attribute Value Change
  • the AVC message is used to notify 0LT 1 to successfully switch the link, so that 0LT 1 sets the link corresponding to 0LT 1 as the standby link.
  • the 0NU After the port is opened by 0LT2, the 0NU sends an automatic protection switching message to the CP Switch.
  • this step is the same as 206 in the previous embodiment, and is not added here. To repeat.
  • the CP switch switches the second sub-link of the first link to the second sub-link of the second link.
  • this step is the same as 206 in the previous embodiment, and details are not mentioned herein.
  • the embodiment of the present invention provides a link switching method, where an optical network unit transmits a monitoring packet to the first link on a first link that is connected to the optical network unit and the aggregation side switching device by using the first maintenance entity port. Performing monitoring; if it is detected that a link failure occurs on the first link, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link; Transmitting, by the optical network unit, an announcement message to the second optical line terminal, so that the second optical line terminal opens the transmission port; the optical network unit is on the second link to the convergence side through the second maintenance entity port
  • the switching device sends an automatic protection switching, so that the aggregation side switching device switches the second sub-link of the first link to the second link after receiving the automatic protection switching message Two sub-links. Therefore, a link switching mechanism is provided, which implements fast linkage switching of links between devices.
  • the present invention further provides a link switching method.
  • a link fault is assumed to be a second sublink uplink fault of the first link, which is the same as the previous embodiment.
  • the network unit is represented as an ONU
  • the aggregation side switching device is represented as a CP Switch
  • the optical line terminal is represented as an OLT, wherein the first optical line terminal is the OLT 1 and the second optical line terminal is the OLT 2, and the same, the embodiment of the present invention
  • a link switching method is provided to include at least two OLTs.
  • the present embodiment takes two as an example. As shown in FIG. 6, the method includes:
  • the ONU monitors the first link by transmitting a monitoring packet on the first link of the ONU and the CP Switch through the first maintenance entity port.
  • this step is the same as 201 in the previous embodiment, and is not described here.
  • the CP switch uses the CCM to obtain a fault of the link between the CP Switch and the OLT 1. Specifically, as shown in FIG. 7, the uplink between the OLT 1 and the CP Switch fails. The first link, the first sub-link of the first link, the second sub-link of the first link, the second link, the first sub-link of the second link, and the second link The definition of the second sub-link is the same as the previous embodiment and is not mentioned here. At this time, the CP switch uses the CCM to detect that the uplink of the first sublink of the first link between the OLT 1 and the CP Switch fails.
  • the CP switch repeatedly switches the service data transmission between the second sublink of the second link and the second sublink of the first link by using a preset frequency, so as to send an automatic protection switching message to the optical network unit. Until the optical network unit receives the automatic protection switching message.
  • the link switch that is performed after the switch receives the automatic protection switching message of the ONU is a valid switch.
  • the CP Switch sends an APS message to the ONU through a tentative link switch, informing the ONU that a link fault occurs.
  • the ONU makes the corresponding operation.
  • the ONU receives the APS message, and uses the CCM to acquire a fault of a link between the optical network unit and the optical line terminal.
  • the ONU uses the CCM to detect that the uplink of the first sublink of the first link between the OLT 1 and the CP switch fails, and obtains the location of the faulty link and the fault information.
  • the failure information may include a cause of the failure or the like.
  • the ONU evaluates a fault of the link between the ONU and the OLT 1.
  • this step is the same as 203 in the previous embodiment, and is not described here.
  • the ONU switches the first sub-link of the first link to the first sub-link of the second link.
  • this step is the same as 204 in the previous embodiment, and is not described here.
  • the ONU sends an announcement message to the OLT2.
  • the ONU sends an AVC (Attribute Value Change) message to the OLT 1.
  • AVC Attribute Value Change
  • this step is the same as 306 in the previous embodiment, and will not be described here.
  • the ONU After the port is opened by the OLT2, the ONU sends an automatic protection switching message to the CP Switch.
  • this step is the same as 206 in the previous embodiment, and is not described here.
  • the CP switch switches the second sub-link of the first link to the second sub-link of the second link.
  • this step is the same as 206 in the previous embodiment, and details are not mentioned herein.
  • the embodiment of the present invention provides a link switching method, where an optical network unit transmits a monitoring packet to the first link on a first link that is connected to the optical network unit and the aggregation side switching device by using the first maintenance entity port. Performing monitoring; if it is detected that a link failure occurs on the first link, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link; Transmitting, by the optical network unit, an announcement message to the second optical line terminal, so that the second optical line terminal opens the transmission port; the optical network unit is on the second link to the convergence side through the second maintenance entity port
  • the switching device sends an automatic protection switching, so that the aggregation side switching device switches the second sub-link of the first link to the second link after receiving the automatic protection switching message Two sub-links. Therefore, a link switching mechanism is provided, which implements fast linkage switching of links between devices.
  • the embodiment of the present invention further provides an optical network unit 1.
  • the optical network unit 1 includes:
  • the monitoring unit 1 1 is configured to monitor, by using the first maintenance entity port, the first link by transmitting a monitoring packet on the first link connected to the aggregation side switching device;
  • the first link includes the optical network unit 1 and the first link.
  • the switching unit 12 is configured to switch the first sub-link of the first link to the first sub-link of the second link, and the second link is an optical network unit, if the link failure of the first link is detected.
  • a link between the optical network unit and the second optical line terminal; and the first sub-link of the second link is a link between the optical network unit and the second optical line terminal;
  • the sending unit 13 is configured to send an advertisement message to the second optical line terminal, where the notification message is used to notify the second optical line terminal of the link switching and the reason for the switching, so that the second optical line terminal turns on the transmission port;
  • the sending unit 13 is further configured to send, by using the second maintenance entity port, an automatic protection switching message to the aggregation side switching device on the second link, where the automatic protection switching message is used to notify the aggregation side switching device to perform link switching, so that the convergence side switching device is configured.
  • the second sub-link of the first link is switched to the second sub-link of the second link; the second sub-link of the second link is the aggregation-side switching device and the The link between the two optical line terminals.
  • a link failure of the first link includes: a first sublink failure of the first link, a downlink failure of the second sublink of the first link, and an uplink failure of the second sublink of the first link;
  • the downlink direction is the direction in which the service data is transmitted from the aggregation side switching device to the first optical line terminal; the second sublink of the first link is in the uplink direction; the uplink direction is the service data from the first optical line terminal box; The direction in which the convergence side transmission device transmits.
  • the maintenance unit 11 is further configured to: The first link fault of the first link and the downlink fault of the second link of the first link are obtained in the monitoring packet.
  • the notification message is a physical layer maintenance management cell.
  • the sending unit 13 is further configured to: Sending an attribute change notification to the first optical line terminal; the attribute change notification message is used to notify the first optical line terminal of the link link switching and the reason for the handover.
  • the optical network unit further includes a receiving unit 14 for:
  • the automatic protection switching message sent by the switching device on the aggregation side is received, so that the optical network unit obtains the link fault information of the first link by using the detection side message after receiving the automatic protection switching message.
  • the embodiment of the present invention provides an optical network unit, where the optical network unit transmits a monitoring packet on the first link that is connected to the optical network unit and the aggregation side switching device by using the first maintenance entity port to perform the first link on the first link.
  • Monitoring if the link failure occurs on the first link, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link;
  • the optical network unit sends an announcement message to the second optical line terminal, so that the second optical line terminal turns on the transmission port; the optical network unit exchanges with the convergence side on the second link through the second maintenance entity port.
  • the device sends an automatic protection switching message, so that the aggregation side switching device switches the second sub-link of the first link to the second sub-link of the second link after receiving the automatic protection switching message link. Therefore, a link switching mechanism is provided, which implements fast linkage switching between devices.
  • the present invention also provides an aggregation side switching device 2, as shown in FIG. 10, the device includes:
  • the monitoring unit 21 is configured to monitor, by using the first maintenance entity port, the first link by transmitting a monitoring packet on the first link connected to the optical network unit;
  • the first link includes the optical network unit and the first optical line terminal a first sub-link between the first sub-link, a second sub-link between the first optical line terminal and the convergence-side switching device;
  • the receiving unit 22 is configured to receive an automatic protection switching message that is sent by the optical network unit by using the second maintenance entity port on the second link, where the automatic protection switching message is used to notify the switching terminal of the V convergence side that the link switching occurs.
  • the switching unit 23 is configured to: after receiving the automatic protection switching message, switch the second sub-link of the first link to the second sub-link of the second link; the second sub-link of the second link is A link between the aggregation side switching device and the second optical line terminal.
  • a link failure of the first link includes: a first sublink failure of the first link, a downlink failure of the second sublink of the first link, and an uplink failure of the second sublink of the first link;
  • the downlink direction is the direction in which the service data is transmitted from the aggregation side switching device to the first optical line terminal; the second sublink of the first link is in the uplink direction; the uplink direction is the service data from the first optical line terminal box; The direction in which the convergence side transmission device transmits.
  • the second sub-link of the first link is in the downlink direction
  • the monitoring unit 21 is further configured to: obtain, from the monitoring packet, a link failure of the first link to be a link failure of the first link to be a downlink fault of the second link of the first link; the switching unit 23 is further configured to: Switching between the second sub-link of the second link and the second sub-link of the first link by repeating the service data transmission at a preset frequency; until the optical network unit receives the automatic protection switching message, the switching unit 23 stop switching;
  • the aggregation side switching device further includes a sending unit 24, as shown in FIG. 11, the transmitting unit 24 is configured to transmit the service data in the second sublink of the second link and the second sublink of the first link in the switching unit 23. After the links are switched, the automatic protection switching message is sent to the optical network unit by using the link that does not perform service data transmission.
  • the embodiment of the present invention provides an aggregation side switching device, after the second optical line terminal opens the transmission port, and the automatic protection that the receiving optical network unit sends on the second link by using the second maintenance entity port. And switching the message, after receiving the automatic protection switching message, switching the second sub-link of the first link to the second sub-link of the second link. Therefore, a link switching mechanism is provided, which implements fast linkage switching of links between devices.
  • the embodiment of the present invention further provides an optical network unit 3.
  • the optical network unit 3 includes: a bus 3 1 , and a processor 32 and a memory 33 connected to the bus. And interface 34, wherein interface 34 is for communicating with other network elements; memory 33 is for storing instructions 33 1; and processor 32 is for executing instructions 33 1 for:
  • the first link by transmitting a monitoring packet on the first link connected to the aggregation side switching device;
  • the first link includes the first between the optical network unit and the first optical line terminal a sub-link, a second sub-link between the first optical line terminal and the aggregation-side switching device;
  • the first sub-link of the first link is switched to the first sub-link of the second link, and the second link is the optical network unit and the aggregation-side switching device.
  • the first sub-link of the second link is a link between the optical network unit and the second optical line terminal;
  • An automatic protection switching message is sent to the aggregation side switching device on the second link by using the second maintenance entity port, and the automatic protection switching message is used to notify the aggregation side switching device to perform link switching, so that the aggregation side switching device receives the automatic protection switching.
  • the second sub-link of the first link is switched to the second sub-link of the second link; the second sub-link of the second link is between the aggregation-side switching device and the second optical line terminal Link.
  • a link failure of the first link includes: a first sublink failure of the first link, a downlink failure of the second sublink of the first link, and an uplink failure of the second sublink of the first link;
  • the downlink direction is the direction in which the service data is transmitted from the aggregation side switching device to the first optical line terminal; the second sublink of the first link is in the uplink direction; the uplink direction is the service data from the first optical line terminal box; The direction in which the convergence side transmission device transmits.
  • the processor 32 executes the instruction 33 1 for:
  • Obtaining a link failure of the first link from the monitoring packet is a first sublink failure of the first link and a downlink failure of the second sublink of the first link.
  • the advertisement message is a physical layer maintenance management cell.
  • the processor 32 executes the instruction 33 1 for:
  • the attribute change notification message is used to notify the first optical line terminal that the link link switching and the reason for the handover occur.
  • the processor 32 executes the instruction 33 1 for:
  • the automatic protection switching message sent by the switching device on the aggregation side is received, so that the optical network unit obtains the link fault information of the first link by using the detection side message after receiving the automatic protection switching message.
  • the embodiment of the present invention provides an optical network unit, where the optical network unit transmits a monitoring packet on the first link that is connected to the optical network unit and the aggregation side switching device by using the first maintenance entity port to perform the first link on the first link.
  • Monitoring if the link failure occurs on the first link, the optical network unit switches the first sub-link of the first link to the first sub-link of the second link;
  • the optical network unit sends an announcement message to the second optical line terminal, so that the second optical line terminal turns on the transmission port; the optical network unit exchanges with the convergence side on the second link through the second maintenance entity port.
  • the device sends an automatic protection switching message, so that the aggregation side switching device switches the second sub-link of the first link to the second sub-link of the second link after receiving the automatic protection switching message link. Therefore, a link switching mechanism is provided, which implements fast linkage switching between devices.
  • the optical network unit 4 includes: a bus 41, and a processor 42, a memory 43 and an interface 44 connected to the bus, wherein the interface 44 is used. Communicating with other network elements; memory 33 for storing instructions 43 1 ; processor 42 executing instructions 43 1 for:
  • the first link by transmitting a monitoring packet on the first link connected to the optical network unit;
  • the first link includes the first sub-interface between the optical network unit and the first optical line terminal a second sub-link between the first optical line terminal and the aggregation side switching device;
  • the receiving optical network unit sends the second link on the second link through the second maintenance entity port
  • the protection switching message is used to notify the switching device on the aggregation side of the link switching.
  • the second sub-link of the first link is switched to the second sub-link of the second link; the second sub-link of the second link is the aggregation-side switching device and the The link between the two optical line terminals.
  • a link failure of the first link includes: a first sublink failure of the first link, a downlink failure of the second sublink of the first link, and an uplink failure of the second sublink of the first link;
  • the downlink direction is the direction in which the service data is transmitted from the aggregation side switching device to the first optical line terminal; the second sublink of the first link is in the uplink direction; the uplink direction is the service data from the first optical line terminal box; The direction in which the convergence side transmission device transmits.
  • the processor 42 executes the instruction 43 1 for:
  • Obtaining a link fault on the first link from the monitoring packet is that the link failure occurs on the first link, and the second sublink in the first link is in the downlink direction fault;
  • the service data transmission is repeatedly switched between the second sublink of the second link and the second sublink of the first link at a preset frequency; until the optical network unit receives the automatic protection switching message, stopping the handover ;
  • the link is sent to the optical network unit by using the link that does not perform service data transmission. Protect the switching message.
  • the embodiment of the present invention provides an aggregation side switching device, after the second optical line terminal opens the transmission port, and the automatic protection that the receiving optical network unit sends on the second link by using the second maintenance entity port. And switching the message, after receiving the automatic protection switching message, switching the second sub-link of the first link to the second sub-link of the second link. Therefore, a link switching mechanism is provided, which implements fast linkage switching of links between devices.
  • the disclosed method and electronic device may be implemented in other manners.
  • the device embodiments described above are only for example, the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or may be integrated into another system, or some Features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and the like, and the program code can be stored. Medium.

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Abstract

本发明实施例提供一种链路切换方法、设备和系统,涉及通信领域,提供了一种链路切换机制,实现了设备间链路的快速联动切换。其具体做法为:光网络单元通过第一维护实体端口在光网络单元与汇聚侧交换设备连接的第一链路上传输监控报文对第一链路进行监控;若监测到第一链路发生链路故障,则光网络单元将第一链路的第一子链路切换至第二链路的第一子链路;光网络单元向第二光线路终端发送通告消息,以便第二光线路终端开启传输端口;光网络单元通过第二维护实体端口在第二链路上向汇聚侧交换设备发送自动保护切换消息,以便汇聚侧交换设备将第一链路的第二子链路切换至第二链路的第二子链路。本发明实施例用于通信链路的切换。

Description

一种链路切换方法、 设备和系统 技术领域
本发明涉及通信领域, 尤其涉及一种链路切换方法、 设备和系 统。
背景技术
网络设备节点双归属保护是一种把一个网络节点通过主备两条 链路连接到另外一个网络区域中两个不同的网络设备上, 通过主备 链路的相互备份保护来提高网络可靠性的网络数据备份方法。 现有 技术中, 一般釆用扩展线路 TYPE B、 TYPE C/TYPE D保护技术来 实现节点的双归保护。
其中, TYPE B通过保护 OLT的主用和备用 PON端口, 主用和 备用光纤实现网络数据备份, 而 TYPE C/TYPE D通过 OLT双 PON 口, ONU 双 PON 口, 主干光纤、 光分路器和配线光纤均双路冗余 来实现网络数据备份。 TYPE C/TYPE D 的具体实现方式包括 OLT 同一 PON板内不同 PON MAC芯片和 PON板间的 PON口保护两种。
同时, 现有技术提供了一种基于 VLAN的以太网线性保护倒换 机制, 即 G.803 1 , 此保护倒换机制通过 APS ( Automatic Protection Switching , 自动保护切换 )协议的实现。 APS协议是由 G.803 1规定 的在双向保护倒换中保持两端设备倒换结果一致性的协议, 且 APS 协议报文只能在保护通道上发送, 不能在工作通道上面传递。
现有技术中, 釆用 G.803 1和 TYPE B/C保护的分段保护方案来 实现网络数据的备份, 即 OLT到 CP使用 G.803 1可以实现 OLT GE 上行双归保护, 利用 G.803 1 VLAN业务通道保护来保护端到端的业 务路径, 同时, PON网络釆用 TYPE B和 TYPE C双归保护方案, 利用 PON 的链路级别保护来 PON主干光纤, 从而实现网络数据的 备份。
然而, 在 G.803 1 和 TYPE B/C 保护的分段保护方案中, 按照 G.803 1标准定义, 只能在一个 OLT和远端交换设备 ETH Switch之 间建立两条互为保护的 VLAN 业务通道 VLAN X、 VLANY , 其中 VLAN X 为主业务通道, VLAN Y 为备份业务通道, 主业务通道 VLAN X故障时, 业务切换到备用业务通道 VLAN Y , 保证 ONT上 接入的业务是正常的。 但是, 当 ONT和一个 OLT之间的 PON故障 后, 另一个 OLT会通过双归属 TYPE B保护, 作为备用 OLT , 打开 该备用 OLT和 ONT之间的 PON 口, 允许故障 PON对应的 ONT上 的业务通过该备用 OLT接入网络, 但因为备用业务通道 VLAN Y是 从故障 PON对应的 ONT上建立的, 备用 OLT无法进行 G.803 1 的 VLAN的保护倒换, OLT上行 Switch链路业务级别中断无法通知到 PON侧, 无法实现业务 PON侧联动倒换; PON 网络的中断同样无 法关联到上行 CP侧链路的倒换, 从而导致 ONT接入的业务中断, 所以在 OLT上行釆用分段保护方案, 会因为保护方案的不一致, 用 户部署复杂, 系统端到端的倒换行为不可预期, 无法快速实现跨设 备真正的端到端的业务级别快速倒换。
发明内容
本发明的实施例提供一种链路切换方法、 设备和系统, 提供了 一种链路切换机制, 实现了设备间链路的快速联动切换。
为达到上述目的, 本发明的实施例釆用如下技术方案: 第一方面, 提供一种光网络单元, 该光网络单元包括: 监控单元, 用于通过第一维护实体端口在与汇聚侧交换设备连 接的第一链路上传输监控报文对所述第一链路进行监控; 所述第一 链路包括所述光网络单元与第一光线路终端之间的第一子链路, 所 述第一光线路终端与所述汇聚侧交换设备之间的第二子链路;
切换单元, 用于若监测到所述第一链路发生链路故障, 将所述 第一链路的第一子链路切换至第二链路的第一子链路, 所述第二链 路为所述光网络单元与所述汇聚侧交换设备之间除所述第一链路外 的链路, 所述第二链路的第一子链路为所述光网络单元与第二光线 路终端之间的链路; 发送单元, 用于向第二光线路终端发送通告消息, 所述通告消 息用于通知所述第二光线路终端发生链路切换以及切换原因, 以便 所述第二光线路终端开启传输端口;
所述发送单元还用于通过第二维护实体端口在所述第二链路上 向所述汇聚侧交换设备发送自动保护切换消息, 所述自动保护切换 消息用于通知所述汇聚侧交换设备发生链路切换, 以便所述汇聚侧 交换设备在接收到所述自动保护切换消息后, 将所述第一链路的第 二子链路切换至所述第二链路的第二子链路; 所述所述第二链路的 第二子链路为所述汇聚侧交换设备与所述第二光线路终端之间的链 路。
结合第一方面, 在第一种可能的实现方式中,
所述第一链路发生链路故障包括: 所述第一链路的第一子链路 故障, 所述第一链路的第二子链路下行方向故障和所述第一链路的 第二子链路上行方向故障;
其中, 所述下行方向为所述业务数据从所述汇聚侧交换设备向 所述第一光线路终端传输的方向; 所述第一链路的第二子链路上行 方向故障; 所述上行方向为所述业务数据从所述第一光线路终端箱 所述汇聚侧交换设备传输的方向。
结合第一方面的第一种可能的实现方式, 在第二种可能的实现 方式中, 若所述第一链路发生链路故障为所述第一链路的第一子链 路故障和所述第一链路的第二子链路下行方向故障, 则所述维护单 元还用于:
从所述监控报文中获取所述第一链路发生链路故障为所述第一 链路的第一子链路故障和所述第一链路的第二子链路下行方向故 障。
结合第一方面的第一种可能的实现方式, 在第三种可能的实现 方式中, 若所述第一链路发生链路故障为所述第一链路的第一子链 路故障, 则所述通告消息为物理层维护管理信元。
结合第一方面的第一种可能的实现方式, 在第四种可能的实现 方式中, 若所述第一链路发生链路故障为所述第一链路的第二子链 路下行方向故障, 则所述通告消息为端口跟踪消息, 在所述业务数 据传输成功切换到所述第二链路的第一子链路后, 所述发送单元还 用于:
向所述第一光线路终端发送属性改变通知; 所述属性改变通知 消息用于通知所述第一光线路终端发生链路链路切换及切换原因。
结合第一方面的第一种可能的实现方式, 在第五种可能的实现 方式中, 若所述链路故障为所述第一链路的第二子链路上行方向故 障, 则所述通告消息为端口跟踪消息, 在所述监控单元利用所述监 控报文获取所述第一链路的链路故障信息之前, 所述光网络单元还 包括接收单元, 所述接收单元用于:
接收所述所述汇聚侧交换设备发送的所述自动保护切换消息, 以便所述光网络单元在接收到所述自动保护切换消息后, 再利用所 述检侧报文获取所述第一链路的链路故障信息。
第二方面, 提供一种汇聚侧交换设备, 该汇聚侧交换设备包 括:
监控单元, 用于通过第一维护实体端口在与光网络单元连接的 第一链路上传输监控报文对所述第一链路进行监控; 所述第一链路 包括所述光网络单元与第一光线路终端之间的第一子链路, 所述第 一光线路终端与所述汇聚侧交换设备之间的第二子链路;
接收单元, 用于接收所述光网络单元通过第二维护实体端口在 所述第二链路上发送的自动保护切换消息, 所述自动保护切换消息 用于通知所述汇聚侧交换设备发生链路切换,
切换单元, 用于在接收到所述自动保护切换消息后, 将所述第 一链路的第二子链路切换至所述第二链路的第二子链路; 所述所述 第二链路的第二子链路为所述汇聚侧交换设备与所述第二光线路终 端之间的链路。
结合第二方面, 在第一种可能的实现方式中,
所述第一链路发生链路故障包括: 所述第一链路的第一子链路 故障, 所述第一链路的第二子链路下行方向故障和所述第一链路的 第二子链路上行方向故障;
其中, 所述下行方向为所述业务数据从所述汇聚侧交换设备向 所述第一光线路终端传输的方向; 所述第一链路的第二子链路上行 方向故障; 所述上行方向为所述业务数据从所述第一光线路终端箱 所述汇聚侧交换设备传输的方向。
结合第二方面的第一种可能的实现方式, 在第二种可能的实现 方式中, 若所述第一链路发生链路故障为所述第一链路的第二子链 路下行方向故障, 则
所述监控单元还用于从所述监控报文中获取所述第一链路发生 链路故障为所述第一链路发生链路故障为所述第一链路的第二子链 路下行方向故障;
所述切换单元还用于以预设频率将业务数据传输反复在所述第 二链路的第二子链路和所述第一链路的第二子链路之间进行切换; 直至所述光网络单元接收到所述自动保护切换消息后, 所述切换单 元停止切换;
所述汇聚侧交换设备还包括发送单元, 所述发送单元用于在所 述切换单元将业务数据传输在所述第二链路的第二子链路和所述第 一链路的第二子链路之间进行切换后, 利用不进行业务数据传输的 链路向所述光网络单元发送所述自动保护切换消息。
第三方面, 提供一种链路切换系统, 该链路切换系统包括至少 两个光线路终端, 所述链路切换系统还第一方面所述的光网络单元 和第二方面所述的汇聚侧交换设备。
第四方面, 提供一种链路切换方法, 该方法包括:
光网络单元通过第一维护实体端口在所述光网络单元与汇聚侧 交换设备连接的第一链路上传输监控报文对所述第一链路进行监 控; 所述第一链路包括所述光网络单元与第一光线路终端之间的第 一子链路, 所述第一光线路终端与所述汇聚侧交换设备之间的第二 子链路; 若监测到所述第一链路发生链路故障, 则所述光网络单元将所 述第一链路的第一子链路切换至第二链路的第一子链路, 所述第二 链路为所述光网络单元与所述汇聚侧交换设备之间除所述第一链路 外的链路, 所述第二链路的第一子链路为所述光网络单元与第二光 线路终端之间的链路;
所述光网络单元向第二光线路终端发送通告消息, 所述通告消 息用于通知所述第二光线路终端发生链路切换以及切换原因, 以便 所述第二光线路终端开启传输端口;
所述光网络单元通过第二维护实体端口在所述第二链路上向所 述汇聚侧交换设备发送自动保护切换消息, 所述自动保护切换消息 用于通知所述汇聚侧交换设备发生链路切换, 以便所述汇聚侧交换 设备在接收到所述自动保护切换消息后, 将所述第一链路的第二子 链路切换至所述第二链路的第二子链路; 所述所述第二链路的第二 子链路为所述汇聚侧交换设备与所述第二光线路终端之间的链路。
结合第四方面, 在第一种可能的实现方式中, 所述第一链路发 生链路故障包括:
所述第一链路的第一子链路故障; 所述第一链路的第一子链路 故障为所述光网络单元检侧到的链路故障;
所述第一链路的第二子链路下行方向故障; 所述下行方向为所 述业务数据从所述汇聚侧交换设备向所述第一光线路终端传输的方 向; 所述第一链路的第二子链路下行方向故障为所述光网络单元检 侧到的链路故障;
所述第一链路的第二子链路上行方向故障; 所述上行方向为所 述业务数据从所述第一光线路终端箱所述汇聚侧交换设备传输的方 向, 所述第一链路的第二子链路上行方向故障为所述聚侧交换设备 检侧到的链路故障。
结合第四方面的第一种可能的实现方式, 在第二种可能的实现 方式中, 若所述链路故障为所述第一链路的第一子链路故障, 则所 述通告消息为物理层维护管理信元。 结合第四方面的第一种可能的实现方式, 在第三种可能的实现 方式中, 若所述链路故障为所述第一链路的第二子链路下行方向故 障, 则所述通告消息为端口跟踪消息, 在所述业务数据传输成功切 换到所述第二链路的第一子链路后, 所述方法还包括:
所述光网络单元向所述第一光线路终端发送属性改变通知; 所 述属性改变通知消息用于通知所述第一光线路终端发生链路链路切 换及切换原因。
结合第四方面的第一种可能的实现方式, 在第四种可能的实现 方式中, 若所述链路故障为所述第一链路的第二子链路上行方向故 障, 则所述通告消息为端口跟踪消息, 在所述光网络单元利用所述 监测数据获取所述第一链路的链路故障信息之前, 所述方法还包 括:
所述汇聚侧交换设备检侧到所述链路故障后, 以预设频率将业 务数据传输反复在所述第二链路的第二子链路和所述第一链路的第 二子链路之间进行切换, 以便利用不进行业务数据传输的链路向所 述光网络单元发送所述自动保护切换消息; 直至所述光网络单元接 收到所述自动保护切换消息后, 所述汇聚侧交换设备停止切换。
本发明实施例提供一种链路切换方法、 设备和系统, 光网络单 元通过第一维护实体端口在所述光网络单元与汇聚侧交换设备连接 的第一链路上传输监控报文对所述第一链路进行监控; 若监测到所 述第一链路发生链路故障, 则所述光网络单元将所述第一链路的第 一子链路切换至第二链路的第一子链路; 所述光网络单元向第二光 线路终端发送通告消息, 以便所述第二光线路终端开启传输端口; 所述光网络单元通过第二维护实体端口在所述第二链路上向所述汇 聚侧交换设备发送自动保护切换消 , , 以便所述汇聚侧交换设备在 接收到所述自动保护切换消息后, 将所述第一链路的第二子链路切 换至所述第二链路的第二子链路。 从而提供了一种链路切换机制, 实现了设备间链路的快速联动切换。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下 面将对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以 根据这些附图获得其他的附图。
图 1 为本发明实施例提供的一种链路切换方法的流程示意图; 图 2 为本发明实施例提供的另一种链路切换方法的流程示意 图;
图 3 为本发明实施例提供的另一种链路切换方法的流程示意 图;
图 4 为本发明实施例提供的另一种链路切换方法的流程示意 图;
图 5 为本发明实施例提供的另一种链路切换方法的流程示意 图;
图 6 为本发明实施例提供的另一种链路切换方法的流程示意 图;
图 7 为本发明实施例提供的另一种链路切换方法的流程示意 图;
图 8为本发明实施例提供的一种光网络单元的结构示意图; 图 9为本发明实施例提供的另一种光网络单元的结构示意图; 图 10 为本发明实施例提供的一种汇聚侧交换设备的结构示意 图;
图 1 1 为本发明实施例提供的另一种汇聚侧交换设备的结构示 意图; 图 12 为本发明实施例提供的另一种光网络单元的结构示意 图;
图 13 为本发明实施例提供的另一种汇聚侧交换设备的结构示 意图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术 方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明 一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本 领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他 实施例, 都属于本发明保护的范围。
本发明实施例提供了一种链路切换方法, 如图 1 所示, 该方法 包括;
101、 光网络单元通过第一维护实体端口在光网络单元与汇聚 侧交换设备连接的第一链路上传输监控报文对第一链路进行监控; 第一链路包括光网络单元与第一光线路终端之间的第一子链路, 第 一光线路终端与汇聚侧交换设备之间的第二子链路。
102、 若监测到第一链路发生链路故障, 则光网络单元将第一 链路的第一子链路切换至第二链路的第一子链路, 第二链路为光网 络单元与汇聚侧交换设备之间除第一链路外的链路, 第二链路的第 一子链路为光网络单元与第二光线路终端之间的链路。
103、 光网络单元向第二光线路终端发送通告消息, 通告消息 用于通知第二光线路终端发生链路切换以及切换原因, 以便第二光 线路终端开启传输端口 。
104、 光网络单元通过第二维护实体端口在第二链路上向汇聚 侧交换设备发送自动保护切换消息, 自动保护切换消息用于通知汇 聚侧交换设备发生链路切换, 以便汇聚侧交换设备在接收到 自动保 护切换消息后, 将第一链路的第二子链路切换至第二链路的第二子 链路; 第二链路的第二子链路为汇聚侧交换设备与第二光线路终端 之间的链路。
本发明实施例提供一种链路切换方法, 光网络单元通过第一维 护实体端口在所述光网络单元与汇聚侧交换设备连接的第一链路上 传输监控报文对所述第一链路进行监控; 若监测到所述第一链路发 生链路故障, 则所述光网络单元将所述第一链路的第一子链路切换 至第二链路的第一子链路; 所述光网络单元向第二光线路终端发送 通告消息, 以便所述第二光线路终端开启传输端口; 所述光网络单 元通过第二维护实体端口在所述第二链路上向所述汇聚侧交换设备 发送自动保护切换消 , ¾ , 以便所述汇聚侧交换设备在接收到所述自 动保护切换消息后, 将所述第一链路的第二子链路切换至所述第二 链路的第二子链路。 从而提供了一种链路切换机制, 实现了设备间 链路的快速联动切换。
为了使本领域技术人员能够更清楚地理解本发明实施例提供的技术 方案, 下面通过具体的实施例, 对本发明实施例提供的一种链路切换方 法进行详细说明, 在本实施例中, 假设链路故障为光网络单元与光线 路终端之间链路的故障, 在本实施例中, 为了方便说明, 将光网络 单元表示为 ONU ( Optical Network Unit ) , 将汇聚侧交换设备表示 为 CP Switch ( Communications Provider 's Switch ) , 将光线路终端 表示为 OLT ( Optical Line Terminal ) , 其中, 第一光线路终端为 0LT 1 , 第二光线路终端为 0LT2 , 本发明实施例所提供的一种链路 切换方法中包括至少两个 0LT , 为了方便说明, 本实施例以两个为 例, 如图 2所示, 该方法包括:
201、 ONU通过第一维护实体端口在 0NU与 CP Switch连接的 第一链路上传输监控报文对第一链路进行监控。
具体的, 监测才艮文可以为 CCM ( Continuity Check Message , 连通性检侧协议 文 ) , 在 0NU 上设置维护实体端 口 MEP ( Maintenance association End Point ) 以便 CCM通过 MEP在 ONU 和 CP Switch之间的每一个 MEP对应的链路之间进行传输, 对于其 中任意一条链路, 0NU和 CP Switch同时利用 CCM对该链路进行监 控。
202、 ONU利用 CCM获取光网络单元与光线路终端之间链路的 故障。
具体的, 如图 3 所示, ONU 与 OLT 1 之间链路发生故障, 其 中, 假设 ONU的第一 MEP经过 OLT 1与 CP Switch之间的链路为第 一链路, ONU与 OLT 1之间的链路为第一链路的第一子链路, OLT 1 与 CP Switch 之间的链路为第一链路的第二子链路; ONU 的第二 MEP经过 OLT2与 CP Switch之间的链路为第二链路, ONU与 OLT2 之间的链路为第二链路的第一子链路, OLT2与 CP Switch之间的链 路为第二链路的第二子链路; 此时, ONU利用 CCM检侧到 ONU与 OLT 1 之间的第一链路的第一子链路发生故障, 并获取故障链路所 在的位置以及故障信息。 该故障信息可以包括故障原因等。
值得注意的是, ONU 与 OLT 之间通过分离器 ( Splitter ) 相互 连接, 而 OLT与 CP Switch之间也包含各种类型的设备, 图中的连 线仅仅是示意性的。
203、 ONU评估该 ONU与 OLT 1之间链路的故障。
具体的, 由于 ONU检侧到的链路故障可能是由于 CCN传输过 程中的错误信息所致, 而不是真正意义上的 ONU与 OLT 1之间链路 发生故障, CCM 需要对该 ONU 与 OLT 1 之间链路的故障, 确认该 链路故障确实为 ONU与 OLT 1之间链路发生故障。
204、 ONU 将第一链路的第一子链路切换至第二链路的第一子 链路。
具体的, ONU将第一 MEP对应的 ONU与 OLT 1之间的链路切 换到 ONU与 OLT2之间的链路, 即将第一链路的第一子链路切换到 第二链路的第一子链路。
205、 ONU向 OLT2发送通告消息。
具体的, 该消息可以是 PLOAM ( Physical Layer Operation Administration and Maintenance , 物理层操作管理维护 ) 消息。 该 PLOAM用于通知 OLT2开启端口。 206、 在 OLT2开启端口之后 ONU向 CP Switch发送自动保护 切换消息。
具体的 , 该 自 动保护切换消 息可 以 为 APS ( Automatic Protection Switching )消息, 该 APS消息用于通知 CP Switch发生链 路切换。
207、 CP Switch将第一链路的第二子链路切换至第二链路的第 二子链路。
具体的, CP Switch将 OLT 1 与 CP Switch之间的链路切换到
OLT2与 CP Switch之间的链路。 从而实现将业务数据传输从第一链 路切换到第二链路。
本发明实施例提供一种链路切换方法, 光网络单元通过第一维 护实体端口在所述光网络单元与汇聚侧交换设备连接的第一链路上 传输监控报文对所述第一链路进行监控; 若监测到所述第一链路发 生链路故障, 则所述光网络单元将所述第一链路的第一子链路切换 至第二链路的第一子链路; 所述光网络单元向第二光线路终端发送 通告消息, 以便所述第二光线路终端开启传输端口; 所述光网络单 元通过第二维护实体端口在所述第二链路上向所述汇聚侧交换设备 发送自动保护切换消 , , 以便所述汇聚侧交换设备在接收到所述自 动保护切换消息后, 将所述第一链路的第二子链路切换至所述第二 链路的第二子链路。 从而提供了一种链路切换机制, 实现了设备间 链路的快速联动切换。
本发明还提供一种链路切换方法, 在本实施例中, 假设链路故 障为第一链路的第二子链路下行方向故障, 与上一个实施例形同, 本实施例中将光网络单元表示为 0NU , 汇聚侧交换设备表示为 CP Switch , 将光线路终端表示为 0LT , 其中 , 第一光线路终端为 0LT 1 , 第二光线路终端为 0LT2 , 同样的, 本发明实施例所提供的 一种链路切换方法中包括至少两个 0LT , 为了方便说明, 本实施例 以两个为例, 如图 4所示, 该方法包括:
301、 0NU通过第一维护实体端口在 0NU与 CP Switch连接的 第一链路上传输监控报文对第一链路进行监控。
在本实施例中, 此步骤与上一实施例中的 201相同, 此处不加 以赘述。
302、 ONU 利用 CCM 获取 CP Switch 与 OLT 1 之间链路的故 障。
具体的, 如图 5所示, OLT 1与 CP Switch之间的下行链路发生 故障。 其中, 第一链路, 第一链路的第一子链路, 第一链路的第二 子链路, 第二链路, 第二链路的第一子链路, 第二链路的第二子链 路的定义与上一个实施例形同, 此处不加以赘述。 此时, ONU利用 CCM检侧到 OLT 1 与 CP Switch之间的为第一链路的第一子链路的 下行链路发生故障, 并获取故障链路所在的位置以及故障信息。 该 故障信息可以包括故障原因等。
303、 ONU评估该 ONU与 OLT 1之间链路的故障。
在本实施例中, 此步骤与上一实施例中的 203相同, 此处不加 以赘述。
304、 ONU 将第一链路的第一子链路切换至第二链路的第一子 链路。
在本实施例中, 此步骤与上一实施例中的 204相同, 此处不加 以赘述。
305、 ONU向 OLT2发送通告消息。
具体的, 该消息可以是 PST ( PON Section Trace , 端口跟踪) 消息。 该 PST消息用于通知 0LT2开启端口。
306、 0NU向 0LT 1发送 AVC ( Attribute Value Change , 属性值 变化) 消息。
具体的, 该 AVC 消息用于通知 0LT 1 以成功切换链路, 以便 0LT 1将与 0LT 1对应的链路设置为备用链路。
307、 在 0LT2开启端口之后 0NU向 CP Switch发送自动保护 切换消息。
在本实施例中, 此步骤与上一实施例中的 206相同, 此处不加 以赘述。
308、 CP Switch将第一链路的第二子链路切换至第二链路的第 二子链路。
在本实施例中, 此步骤与上一实施例中的 206相同, 此处不加 议赘述。
本发明实施例提供一种链路切换方法, 光网络单元通过第一维 护实体端口在所述光网络单元与汇聚侧交换设备连接的第一链路上 传输监控报文对所述第一链路进行监控; 若监测到所述第一链路发 生链路故障, 则所述光网络单元将所述第一链路的第一子链路切换 至第二链路的第一子链路; 所述光网络单元向第二光线路终端发送 通告消息, 以便所述第二光线路终端开启传输端口; 所述光网络单 元通过第二维护实体端口在所述第二链路上向所述汇聚侧交换设备 发送自动保护切换消 , , 以便所述汇聚侧交换设备在接收到所述自 动保护切换消息后, 将所述第一链路的第二子链路切换至所述第二 链路的第二子链路。 从而提供了一种链路切换机制, 实现了设备间 链路的快速联动切换。
本发明还提供一种链路切换方法, 在本实施例中, 假设链路故 障为第一链路的第二子链路上行方向故障, 与上一个实施例形同, 本实施例中将光网络单元表示为 ONU , 汇聚侧交换设备表示为 CP Switch , 将光线路终端表示为 OLT , 其中 , 第一光线路终端为 OLT 1 , 第二光线路终端为 OLT2 , 同样的, 本发明实施例所提供的 一种链路切换方法中包括至少两个 OLT , 为了方便说明, 本实施例 以两个为例, 如图 6所示, 该方法包括:
401、 ONU通过第一维护实体端口在 ONU与 CP Switch连接的 第一链路上传输监控报文对第一链路进行监控。
在本实施例中, 此步骤与上一实施例中的 201相同, 此处不加 以赘述。
402、 CP Switch利用 CCM获取 CP Switch与 OLT 1之间链路的 故障。 具体的, 如图 7所示, OLT 1与 CP Switch之间的上行链路发生 故障。 其中, 第一链路, 第一链路的第一子链路, 第一链路的第二 子链路, 第二链路, 第二链路的第一子链路, 第二链路的第二子链 路的定义与上一个实施例形 同 , 此处不加以赞述。 此时, CP Switch利用 CCM检侧到 OLT 1与 CP Switch之间的为第一链路的第 一子链路的上行链路发生故障。
403、 CP Switch 以预设频率将业务数据传输反复在第二链路的 第二子链路和第一链路的第二子链路之间进行切换, 以便向光网络 单元发送自动保护切换消息, 直至光网络单元接收到 自动保护切换 消息。
由于 CP Switch只有在接收到 ONU的自动保护切换消息后进行 的链路切换属于有效切换, 此时, CP Switch 通过试探性的链路切 换将 APS 消息发送给 ONU , 通知 ONU发生链路故障, 以便 ONU 作出对应的操作。
404、 ONU接收该 APS 消息, 利用 CCM获取光网络单元与光 线路终端之间链路的故障。
具体的, ONU利用 CCM检侧到 OLT 1与 CP Switch之间的为第 一链路的第一子链路的上行链路发生故障, 并获取故障链路所在的 位置以及故障信息。 该故障信息可以包括故障原因等。
405、 ONU评估该 ONU与 OLT 1之间链路的故障。
在本实施例中, 此步骤与上一实施例中的 203相同, 此处不加 以赘述。
406、 ONU 将第一链路的第一子链路切换至第二链路的第一子 链路。
在本实施例中, 此步骤与上一实施例中的 204相同, 此处不加 以赘述。
407、 ONU向 OLT2发送通告消息。
在本实施例中, 此步骤与上一实施例中的 305相同, 此处不加 以赘述。 408、 ONU向 OLT 1发送 AVC ( Attribute Value Change , 属性值 变化) 消息。
具体的, 此步骤与上一实施例中的 306 相同, 此处不加以赘 述。
409、 在 OLT2开启端口之后 ONU向 CP Switch发送自动保护 切换消息。
在本实施例中, 此步骤与上一实施例中的 206相同, 此处不加 以赘述。
410、 CP Switch将第一链路的第二子链路切换至第二链路的第 二子链路。
在本实施例中, 此步骤与上一实施例中的 206相同, 此处不加 议赘述。
本发明实施例提供一种链路切换方法, 光网络单元通过第一维 护实体端口在所述光网络单元与汇聚侧交换设备连接的第一链路上 传输监控报文对所述第一链路进行监控; 若监测到所述第一链路发 生链路故障, 则所述光网络单元将所述第一链路的第一子链路切换 至第二链路的第一子链路; 所述光网络单元向第二光线路终端发送 通告消息, 以便所述第二光线路终端开启传输端口; 所述光网络单 元通过第二维护实体端口在所述第二链路上向所述汇聚侧交换设备 发送自动保护切换消 , , 以便所述汇聚侧交换设备在接收到所述自 动保护切换消息后, 将所述第一链路的第二子链路切换至所述第二 链路的第二子链路。 从而提供了一种链路切换机制, 实现了设备间 链路的快速联动切换。
本发明实施例还提供一种光网络单元 1 , 如图 8 所示, 该光网 络单元 1 包括:
监控单元 1 1 , 用于通过第一维护实体端口在与汇聚侧交换设 备连接的第一链路上传输监控报文对第一链路进行监控; 第一链路 包括光网络单元 1 与第一光线路终端之间的第一子链路, 第一光线 路终端与汇聚侧交换设备之间的第二子链路; 切换单元 12 , 用于若监测到第一链路发生链路故障, 将第一 链路的第一子链路切换至第二链路的第一子链路, 第二链路为光网 络单元 1 与汇聚侧交换设备之间除第一链路外的链路, 第二链路的 第一子链路为光网络单元与第二光线路终端之间的链路;
发送单元 13 , 用于向第二光线路终端发送通告消息, 通告消 息用于通知第二光线路终端发生链路切换以及切换原因, 以便第二 光线路终端开启传输端口;
发送单元 13 还用于通过第二维护实体端口在第二链路上向汇 聚侧交换设备发送自动保护切换消息, 自动保护切换消息用于通知 汇聚侧交换设备发生链路切换, 以便汇聚侧交换设备在接收到 自动 保护切换消息后, 将第一链路的第二子链路切换至第二链路的第二 子链路; 第二链路的第二子链路为汇聚侧交换设备与第二光线路终 端之间的链路。
可选的,
第一链路发生链路故障包括: 第一链路的第一子链路故障, 第 一链路的第二子链路下行方向故障和第一链路的第二子链路上行方 向故障;
其中, 下行方向为业务数据从汇聚侧交换设备向第一光线路终 端传输的方向; 第一链路的第二子链路上行方向故障; 上行方向为 业务数据从第一光线路终端箱 ';匚聚侧交换设备传输的方向。
可选的, 若第一链路发生链路故障为第一链路的第一子链路故 障和第一链路的第二子链路下行方向故障, 则维护单元 1 1还用于: 从监控报文中获取第一链路发生链路故障为第一链路的第一子 链路故障和第一链路的第二子链路下行方向故障。
可选的, 若第一链路发生链路故障为第一链路的第一子链路故 障, 则通告消息为物理层维护管理信元。
可选的, 若第一链路发生链路故障为第一链路的第二子链路下 行方向故障, 则通告消息为端口跟踪消息, 在业务数据传输成功切 换到第二链路的第一子链路后, 发送单元 13还用于: 向第一光线路终端发送属性改变通知; 属性改变通知消息用于 通知第一光线路终端发生链路链路切换及切换原因。
可选的, 如图 9所示, 若链路故障为第一链路的第二子链路上 行方向故障, 则通告消息为端口跟踪消息, 在监控单元利用监控报 文获取第一链路的链路故障信息之前, 光网络单元还包括接收单元 14 , 接收单元 14用于:
接收汇聚侧交换设备发送的自动保护切换消息, 以便光网络单 元在接收到 自动保护切换消息后, 再利用检侧报文获取第一链路的 链路故障信息。
本发明实施例提供一种光网络单元, 光网络单元通过第一维护 实体端口在所述光网络单元与汇聚侧交换设备连接的第一链路上传 输监控报文对所述第一链路进行监控; 若监测到所述第一链路发生 链路故障, 则所述光网络单元将所述第一链路的第一子链路切换至 第二链路的第一子链路; 所述光网络单元向第二光线路终端发送通 告消息, 以便所述第二光线路终端开启传输端口; 所述光网络单元 通过第二维护实体端口在所述第二链路上向所述汇聚侧交换设备发 送自动保护切换消息, 以便所述汇聚侧交换设备在接收到所述自动 保护切换消息后, 将所述第一链路的第二子链路切换至所述第二链 路的第二子链路。 从而提供了一种链路切换机制, 实现了设备间链 路的快速联动切换。
本发明还提供一种汇聚侧交换设备 2 , 如图 10所示, 该设备包 括:
监控单元 21 , 用于通过第一维护实体端口在与光网络单元连 接的第一链路上传输监控报文对第一链路进行监控; 第一链路包括 光网络单元与第一光线路终端之间的第一子链路, 第一光线路终端 与汇聚侧交换设备之间的第二子链路;
接收单元 22 , 用于接收光网络单元通过第二维护实体端口在 第二链路上发送的自动保护切换消息, 自动保护切换消息用于通知 V匚聚侧交换设备发生链路切换, 切换单元 23 , 用于在接收到 自动保护切换消息后, 将第一链 路的第二子链路切换至第二链路的第二子链路; 第二链路的第二子 链路为汇聚侧交换设备与第二光线路终端之间的链路。
可选的,
第一链路发生链路故障包括: 第一链路的第一子链路故障, 第 一链路的第二子链路下行方向故障和第一链路的第二子链路上行方 向故障;
其中, 下行方向为业务数据从汇聚侧交换设备向第一光线路终 端传输的方向; 第一链路的第二子链路上行方向故障; 上行方向为 业务数据从第一光线路终端箱 ';匚聚侧交换设备传输的方向。
可选的, 若第一链路发生链路故障为第一链路的第二子链路下 行方向故障, 则
监控单元 21 还用于从监控报文中获取第一链路发生链路故障 为第一链路发生链路故障为第一链路的第二子链路下行方向故障; 切换单元 23 还用于以预设频率将业务数据传输反复在第二链 路的第二子链路和第一链路的第二子链路之间进行切换; 直至光网 络单元接收到 自动保护切换消息后, 切换单元 23停止切换;
汇聚侧交换设备还包括发送单元 24 , 如图 1 1 所示, 发送单元 24 用于在切换单元 23 将业务数据传输在第二链路的第二子链路和 第一链路的第二子链路之间进行切换后, 利用不进行业务数据传输 的链路向光网络单元发送自动保护切换消息。
本发明实施例提供一种汇聚侧交换设备, 该汇聚侧交换设备在 第二光线路终端开启传输端口后; 接收光网络单元通过第二维护实 体端口在所述第二链路上发送的自动保护切换消息, 在接收到所述 自动保护切换消息后, 将所述第一链路的第二子链路切换至所述第 二链路的第二子链路。 从而提供了一种链路切换机制, 实现了设备 间链路的快速联动切换。
本发明实施例还提供一种光网络单元 3 , 如图 12所示, 该光网 络单元 3 包括: 总线 3 1 , 以及连接到总线的处理器 32、 存储器 33 和接口 34 , 其中接口 34用于和其他网元通信; 存储器 33用于存储 指令 33 1 ; 处理器 32执行指令 33 1用于:
通过第一维护实体端口在与汇聚侧交换设备连接的第一链路上 传输监控报文对第一链路进行监控; 第一链路包括光网络单元与第 一光线路终端之间的第一子链路, 第一光线路终端与汇聚侧交换设 备之间的第二子链路;
若监测到第一链路发生链路故障, 将第一链路的第一子链路切 换至第二链路的第一子链路, 第二链路为光网络单元与汇聚侧交换 设备之间除第一链路外的链路, 第二链路的第一子链路为光网络单 元与第二光线路终端之间的链路;
向第二光线路终端发送通告消息, 通告消息用于通知第二光线 路终端发生链路切换以及切换原因, 以便第二光线路终端开启传输 端口;
通过第二维护实体端口在第二链路上向汇聚侧交换设备发送自 动保护切换消息, 自动保护切换消息用于通知汇聚侧交换设备发生 链路切换, 以便汇聚侧交换设备在接收到 自动保护切换消息后, 将 第一链路的第二子链路切换至第二链路的第二子链路; 第二链路的 第二子链路为汇聚侧交换设备与第二光线路终端之间的链路。
可选的,
第一链路发生链路故障包括: 第一链路的第一子链路故障, 第 一链路的第二子链路下行方向故障和第一链路的第二子链路上行方 向故障;
其中, 下行方向为业务数据从汇聚侧交换设备向第一光线路终 端传输的方向; 第一链路的第二子链路上行方向故障; 上行方向为 业务数据从第一光线路终端箱 ';匚聚侧交换设备传输的方向。
可选的, 处理器 32执行指令 33 1用于:
从监控报文中获取第一链路发生链路故障为第一链路的第一子 链路故障和第一链路的第二子链路下行方向故障。
可选的, 若第一链路发生链路故障为第一链路的第一子链路故障, 则通 告消息为物理层维护管理信元。
可选的, 处理器 32执行指令 33 1用于:
向第一光线路终端发送属性改变通知; 属性改变通知消息用于 通知第一光线路终端发生链路链路切换及切换原因。
可选的, 处理器 32执行指令 33 1用于:
接收汇聚侧交换设备发送的自动保护切换消息, 以便光网络单 元在接收到 自动保护切换消息后, 再利用检侧报文获取第一链路的 链路故障信息。
本发明实施例提供一种光网络单元, 光网络单元通过第一维护 实体端口在所述光网络单元与汇聚侧交换设备连接的第一链路上传 输监控报文对所述第一链路进行监控; 若监测到所述第一链路发生 链路故障, 则所述光网络单元将所述第一链路的第一子链路切换至 第二链路的第一子链路; 所述光网络单元向第二光线路终端发送通 告消息, 以便所述第二光线路终端开启传输端口; 所述光网络单元 通过第二维护实体端口在所述第二链路上向所述汇聚侧交换设备发 送自动保护切换消息, 以便所述汇聚侧交换设备在接收到所述自动 保护切换消息后, 将所述第一链路的第二子链路切换至所述第二链 路的第二子链路。 从而提供了一种链路切换机制, 实现了设备间链 路的快速联动切换。
本发明实施例还提供一种汇聚侧交换设备 4 , 如图 13所示, 该 光网络单元 4包括: 总线 41 , 以及连接到总线的处理器 42、 存储器 43和接口 44 , 其中接口 44用于和其他网元通信; 存储器 33用于存 储指令 43 1 ; 处理器 42执行指令 43 1用于:
通过第一维护实体端口在与光网络单元连接的第一链路上传输 监控报文对第一链路进行监控; 第一链路包括光网络单元与第一光 线路终端之间的第一子链路, 第一光线路终端与汇聚侧交换设备之 间的第二子链路;
接收光网络单元通过第二维护实体端口在第二链路上发送的自 动保护切换消息, 自动保护切换消息用于通知汇聚侧交换设备发生 链路切换,
在接收到 自动保护切换消息后, 将第一链路的第二子链路切换 至第二链路的第二子链路; 第二链路的第二子链路为汇聚侧交换设 备与第二光线路终端之间的链路。
可选的,
第一链路发生链路故障包括: 第一链路的第一子链路故障, 第 一链路的第二子链路下行方向故障和第一链路的第二子链路上行方 向故障;
其中, 下行方向为业务数据从汇聚侧交换设备向第一光线路终 端传输的方向; 第一链路的第二子链路上行方向故障; 上行方向为 业务数据从第一光线路终端箱 ';匚聚侧交换设备传输的方向。
可选的, 处理器 42执行指令 43 1用于:
从监控报文中获取第一链路发生链路故障为第一链路发生链路 故障为第一链路的第二子链路下行方向故障;
以预设频率将业务数据传输反复在第二链路的第二子链路和第 一链路的第二子链路之间进行切换; 直至光网络单元接收到 自动保 护切换消息后, 停止切换;
在切换单元将业务数据传输在第二链路的第二子链路和第一链 路的第二子链路之间进行切换后, 利用不进行业务数据传输的链路 向光网络单元发送自动保护切换消息。
本发明实施例提供一种汇聚侧交换设备, 该汇聚侧交换设备在 第二光线路终端开启传输端口后; 接收光网络单元通过第二维护实 体端口在所述第二链路上发送的自动保护切换消息, 在接收到所述 自动保护切换消息后, 将所述第一链路的第二子链路切换至所述第 二链路的第二子链路。 从而提供了一种链路切换机制, 实现了设备 间链路的快速联动切换。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的方法和电 子设备, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅 仅是示意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实 际实现时可以有另外的划分方式, 例如多个单元或组件可以结合或者可 以集成到另一个系统, 或一些特征可以忽略, 或不执行。 另一点, 所显 示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接 口, 装置或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形 式。 所述作为分离部件说明的单元可以是或者也可以不是物理上分开 的, 作为单元显示的部件可以是或者也可以不是物理单元, 即可以位于 一个地方, 或者也可以分布到多个网络单元上。 可以根据实际的需要选 择其中的部分或者全部单元来实现本实施例方案的目的。 另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单 元中, 也可以是各个单元单独物理包括, 也可以两个或两个以上单元集 成在一个单元中。 上述集成的单元既可以釆用硬件的形式实现, 也可以 釆用硬件加软件功能单元的形式实现。 上述以软件功能单元的形式实现的集成的单元, 可以存储在一个计 算机可读取存储介质中。 上述软件功能单元存储在一个存储介质中, 包 括若干指令用以使得一台计算机设备 (可以是个人计算机, 服务器, 或 者网络设备等) 执行本发明各个实施例所述方法的部分步骤。 而前述的 存储介质包括: U盘、 移动硬盘、 只读存储器 (Read-Only Memory, 简 称 ROM ) 、 随机存取存储器 ( Random Access Memory, 简称 RAM ) 、 磁碟或者光盘等各种可以存储程序代码的介质。 以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不 局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本 发明的保护范围应以所述权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种光网络单元, 其特征在于, 所述光网络单元包括第一维 护实体端口和第二维护实体端口, 所述光网络单元还包括:
监控单元, 用于通过所述第一维护实体端口在与汇聚侧交换设 备连接的第一链路上传输监控报文对所述第一链路进行监控; 所述 第一链路包括所述光网络单元与第一光线路终端之间的第一子链 路, 所述第一光线路终端与所述汇聚侧交换设备之间的第二子链 路; 所述第一维护实体端口为所述第一链路对应的端口;
切换单元, 用于在监测到所述第一链路发生链路故障时, 将所 述第一链路的第一子链路切换至第二链路的第一子链路, 所述第二 链路为所述光网络单元与所述汇聚侧交换设备之间除所述第一链路 外的链路, 所述第二链路的第一子链路为所述光网络单元与第二光 线路终端之间的链路;
发送单元, 用于向第二光线路终端发送通告消息, 所述通告消 息用于通知所述第二光线路终端发生链路切换以及切换原因, 以便 所述第二光线路终端开启传输端口;
所述发送单元还用于通过所述第二维护实体端口在所述第二链 路上向所述汇聚侧交换设备发送自动保护切换消息, 所述自动保护 切换消息用于通知所述汇聚侧交换设备发生链路切换, 以便所述汇 聚侧交换设备在接收到所述自动保护切换消息后, 将所述第一链路 的第二子链路切换至所述第二链路的第二子链路; 所述第二链路的 第二子链路为所述汇聚侧交换设备与所述第二光线路终端之间的链 路; 所述第二维护实体端口为所述第二链路对应的端口。
2、 根据权利要求 1所述的光网络单元, 其特征在于,
所述第一链路发生的链路故障包括: 所述第一链路的第一子链 路故障, 所述第一链路的第二子链路下行方向故障和所述第一链路 的第二子链路上行方向故障;
其中, 所述第一链路的第二子链路下行方向为所述业务数据从 所述汇聚侧交换设备向所述第一光线路终端传输的方向; 所述第一 链路的第二子链路上行方向为所述业务数据从所述第一光线路终端 箱所述汇聚侧交换设备传输的方向。
3、 根据权利要求 2所述的光网络单元, 其特征在于, 若所述第 一链路发生的链路故障为所述第一链路的第一子链路故障和所述第 一链路的第二子链路下行方向故障, 则所述维护单元还用于:
从所述监控报文中获取所述第一链路发生链路故障为所述第一 链路的第一子链路故障和所述第一链路的第二子链路下行方向故 障。
4、 根据权利要求 2所述的光网络单元, 其特征在于, 若所述第 一链路发生的链路故障为所述第一链路的第一子链路故障, 则所述 通告消息为物理层维护管理信元。
5、 根据权利要求 2 所述的光网络单元, 其特征在于, 若所述 第一链路发生链路故障为所述第一链路的第二子链路下行方向故 障, 则所述通告消息为端口跟踪消息, 在所述业务数据传输成功切 换到所述第二链路的第一子链路后, 所述发送单元还用于:
向所述第一光线路终端发送属性改变通知; 所述属性改变通知 消息用于通知所述第一光线路终端发生链路链路切换及切换原因。
6、 根据权利要求 2所述的光网络单元, 其特征在于, 若所述链 路故障为所述第一链路的第二子链路上行方向故障, 则所述通告消 息为端口跟踪消息, 所述光网络单元还包括接收单元, 在所述监控 单元利用所述监控报文获取所述第一链路的链路故障信息之前, 所 述接收单元用于:
接收所述所述汇聚侧交换设备发送的所述自动保护切换消 , ¾ , 以便所述光网络单元在接收到所述自动保护切换消息后, 再利用所 述监控报文获取所述第一链路的链路故障信息。
7、 一种汇聚侧交换设备, 其特征在于, 所述汇聚侧交换设备包 括:
监控单元, 用于通过第一维护实体端口在与光网络单元连接的 第一链路上传输监控报文对所述第一链路进行监控; 所述第一链路 包括所述光网络单元与第一光线路终端之间的第一子链路, 所述第 一光线路终端与所述汇聚侧交换设备之间的第二子链路;
接收单元, 用于接收所述光网络单元通过第二维护实体端口在 所述第二链路上发送的 自动保护切换消息, 所述自动保护切换消息 用于通知所述汇聚侧交换设备发生链路切换;
切换单元, 用于在接收到所述自动保护切换消息后, 将所述第 一链路的第二子链路切换至所述第二链路的第二子链路; 所述第二 链路的第二子链路为所述汇聚侧交换设备与所述第二光线路终端之 间的链路。
8、 根据权利要求 7所述的汇聚侧交换设备, 其特征在于, 所述第一链路发生的链路故障包括: 所述第一链路的第一子链 路故障, 所述第一链路的第二子链路下行方向故障和所述第一链路 的第二子链路上行方向故障;
其中, 所述第一链路的第二子链路下行方向为所述业务数据从 所述汇聚侧交换设备向所述第一光线路终端传输的方向; 所述第一 链路的第二子链路上行方向为所述业务数据从所述第一光线路终端 向所述汇聚侧交换设备传输的方向。
9、 根据权利要求 8所述的汇聚侧交换设备, 其特征在于, 其特 征在于, 若所述第一链路发生的链路故障为所述第一链路的第二子 链路下行方向故障, 则
所述监控单元还用于从所述监控报文中获取所述第一链路发生 的链路故障为所述第一链路的第二子链路下行方向故障;
所述切换单元还用于以预设频率将业务数据传输反复在所述第 二链路的第二子链路和所述第一链路的第二子链路之间进行切换; 直至所述光网络单元接收到所述自动保护切换消息后, 所述切换单 元停止切换;
所述汇聚侧交换设备还包括发送单元, 所述发送单元用于在所 述切换单元将业务数据传输在所述第二链路的第二子链路和所述第 一链路的第二子链路之间进行切换后, 利用不进行业务数据传输的 链路向所述光网络单元发送所述自动保护切换消息。
10、 一种链路切换系统, 其特征在于, 所述链路切换系统包括 至少两个光线路终端, 所述链路切换系统还包括权力要求 1至 6所述 的光网络单元和权利要求 7至 9所述的汇聚侧交换设备。
1 1、 一种链路切换方法, 所述链路切换方法应用于一种链路切 换系统, 所述链路切换系统包括: 光网络单元、 第一光线路终端、 第二光线路终端和汇聚侧交换设备; 所述光网络单元与第一光线路 终端之间的第一子链路和所述第一光线路终端与所述汇聚侧交换设 备之间的第二子链路形成第一链路; 所述光网络单元与第二光线路 终端之间的第一子链路和所述第二光线路终端与所述汇聚侧交换设 备之间的第二子链路形成第二链路; 所述光网络单元包括第一维护 实体端口和第二维护实体端口, 所述第一维护实体端口为所述第一 链路对应的端口, 所述第二维护实体端口为所述第二链路对应的端 口, 其特征在于, 所述方法包括:
所述光网络单元通过所述第一维护实体端口在所述光网络单元 与所述汇聚侧交换设备连接的所述第一链路上传输监控报文对所述 第一链路进行监控;
若监测到所述第一链路发生链路故障, 则所述光网络单元将所 述第一链路的第一子链路切换至所述第二链路的第一子链路;
所述光网络单元向所述第二光线路终端发送通告消息, 所述通 告消息用于通知所述第二光线路终端发生链路切换以及切换原因, 以便所述第二光线路终端开启传输端口;
所述光网络单元通过所述第二维护实体端口在所述第二链路上 向所述汇聚侧交换设备发送自动保护切换消息, 所述自动保护切换 消息用于通知所述汇聚侧交换设备发生链路切换, 以便所述汇聚侧 交换设备在接收到所述自动保护切换消息后, 将所述第一链路的第 二子链路切换至所述第二链路的第二子链路。
12、 根据权利要求 1 1 所述的方法, 其特征在于, 所述第一链路 发生的链路故障包括: 所述第一链路的第一子链路故障; 所述第一链路的第一子链路 故障为所述光网络单元检测到的链路故障;
所述第一链路的第二子链路下行方向故障; 所述下行方向为所 述业务数据从所述汇聚侧交换设备向所述第一光线路终端传输的方 向; 所述第一链路的第二子链路下行方向故障为所述光网络单元检 侧到的链路故障;
所述第一链路的第二子链路上行方向故障; 所述上行方向为所 述业务数据从所述第一光线路终端箱所述汇聚侧交换设备传输的方 向, 所述第一链路的第二子链路上行方向故障为所述聚侧交换设备 检侧到的链路故障。
13、 根据权利 12所述的方法, 其特征在于, 若所述链路故障为 所述第一链路的第一子链路故障, 则所述通告消息为物理层维护管 理信元。
14、 根据权利要求 12所述的方法, 其特征在于,
若所述链路故障为所述第一链路的第二子链路下行方向故障, 则所述通告消息为端口跟踪消息, 在所述业务数据传输成功切换到 所述第二链路的第一子链路后, 所述方法还包括:
所述光网络单元向所述第一光线路终端发送属性改变通知; 所 述属性改变通知消息用于通知所述第一光线路终端发生链路链路切 换及切换原因。
15、 根据权利要求 12所述的方法, 其特征在于, 若所述链路故 障为所述第一链路的第二子链路上行方向故障, 则所述通告消息为 端口跟踪消息, 在所述光网络单元利用所述监测数据获取所述第一 链路的链路故障信息之前, 所述方法还包括:
所述汇聚侧交换设备检侧到所述链路故障后, 以预设频率将业 务数据传输反复在所述第二链路的第二子链路和所述第一链路的第 二子链路之间进行切换, 以便利用不进行业务数据传输的链路向所 述光网络单元发送所述自动保护切换消息; 直至所述光网络单元接 收到所述自动保护切换消息后, 所述汇聚侧交换设备停止切换。
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