WO2012167667A1 - Procédé, dispositif et dispositif de nœud de traitement de dégradation de signal - Google Patents

Procédé, dispositif et dispositif de nœud de traitement de dégradation de signal Download PDF

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Publication number
WO2012167667A1
WO2012167667A1 PCT/CN2012/073934 CN2012073934W WO2012167667A1 WO 2012167667 A1 WO2012167667 A1 WO 2012167667A1 CN 2012073934 W CN2012073934 W CN 2012073934W WO 2012167667 A1 WO2012167667 A1 WO 2012167667A1
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Prior art keywords
signal degradation
module
alarm
node device
node
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PCT/CN2012/073934
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English (en)
Chinese (zh)
Inventor
刘必振
邱军
金飞蔡
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中兴通讯股份有限公司
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Publication of WO2012167667A1 publication Critical patent/WO2012167667A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0604—Management of faults, events, alarms or notifications using filtering, e.g. reduction of information by using priority, element types, position or time
    • H04L41/0609—Management of faults, events, alarms or notifications using filtering, e.g. reduction of information by using priority, element types, position or time based on severity or priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Definitions

  • the present invention relates to the field of communications, and in particular, to a signal degradation processing method, apparatus, and node device. Background technique
  • T-MPLS transport multi-protocol label switching
  • Transmission-Multi-Protocol Label Switching is a Packet Transport Network (PTN) technology standardized by the International Telecommunications Union (Telecommunication) (ITU-T), which can solve the traditional synchronous digital system (SDH, Synchronous). Digital Hierarchy) is a mainstream packet transmission technology that is exposed to inefficiencies in a packet-switched network environment.
  • PTN Packet Transport Network
  • ITU-T International Telecommunications Union
  • SDH Synchronous
  • Digital Hierarchy is a mainstream packet transmission technology that is exposed to inefficiencies in a packet-switched network environment.
  • the data forwarding plane of the T-MPLS network is a subset of Multi-Protocol Label Switching (MPLS), which is forwarded based on the T-MPLS label, which removes the IP-based connectionless forwarding feature and increases the end-to-end OAM (Operation Administration and Maintenance) and protection recovery.
  • MPLS Multi-Protocol Label Switching
  • the T-MPLS network uses the Automatically Switched Optical Network I Generalized Multi-protocol Label Switching (ASON/GMPLS) as its control plane.
  • ASON/GMPLS Automatically Switched Optical Network I Generalized Multi-protocol Label Switching
  • the label switching path (LSP, Label) Switching Path)
  • the packet loss is mainly caused by the following two reasons: one is packet loss caused by node congestion, and the other is packet loss caused by line error or error of the internal interconnect bus of the node, caused by line error.
  • the concept of signal anomaly (SF, Signal Fail) detection and the concept of signal degradation (SD, Signal Degrade) are proposed.
  • the so-called signal anomaly refers to the failure to receive data packets within the set time due to packet loss.
  • signal degradation refers to a problem of packet loss due to line error, resulting in an increase in the bit error rate of the line.
  • the MEP announces an abnormality in the incoming signal.
  • Signal anomalies can also be announced by the server layer's terminals to notify the server/Ethernet (ETH, Ethernet) adaptation function (such as the server MEP) about server-level failure conditions.
  • ETH server/Ethernet
  • Ethernet server/Ethernet
  • the configured MEP can send a frame with the information of the ETH-AIS (Ethernet Alarm Indication Signal).
  • the MEP can immediately begin transmitting frames with ETH-AIS information periodically on the configured customer MEG level until the signal anomaly is removed.
  • the MEP detects an AIS (Alarm Indication Signal) condition, suppressing an alarm of loss of continuity (LOC) failure associated with all of its peer MEPs.
  • LOC loss of continuity
  • Embodiments of the present invention provide a signal degradation processing method, apparatus, and node apparatus for solving the problem of no corresponding processing for signal degradation in the prior art.
  • a signal degradation processing method comprising:
  • the node device determines to generate a signal degradation alarm
  • the node device determines the type of the generated signal degradation alarm
  • the node device If the determined type is a forward error notification FEI alarm, the node device generates an interface alarm. If the determined type is a degraded SD alarm, the node device performs tunnel switching.
  • the node device determines that the signal degradation alarm is generated as:
  • the node device When the node device detects that the packet error rate of its own span is higher than the first set value, it determines that a signal degradation alarm is generated.
  • the node device determines that the signal degradation alarm is generated as:
  • the node device receives the signal degradation information and determines to generate a signal degradation alarm based on the received signal degradation information.
  • a signal degradation processing apparatus comprising: an alarm determination module, a type determination module, and an alarm processing module;
  • the alarm determining module is configured to determine that the node device where the device is located generates a signal degradation alarm
  • the type determining module is configured to determine a type of the signal degradation alarm determined by the alarm determining module
  • the alarm processing module is configured to: when the type determined by the type determining module is a forward error notification FEI alarm, control a node device where the device is located to generate an interface alarm; and the type determined by the type determining module To degrade the SD alarm, the node device where the device is located is controlled to perform tunnel switching.
  • FEI alarm forward error notification FEI alarm
  • the alarm determining module specifically includes: a detecting submodule and an alarm determining submodule; wherein The detecting submodule is configured to determine whether a packet error rate of a span device to which the device is located is higher than a first set value;
  • the alarm determining sub-module is configured to determine that the node device where the device is located generates a signal degradation alarm when the detecting sub-module determines that the inter-segment packet error rate of the node where the device is located is higher than the first set value.
  • the alarm determining module specifically includes: a receiving submodule and an alarm determining submodule; wherein the receiving submodule is configured to receive signal degradation information;
  • the alarm determining sub-module is configured to: when the receiving sub-module receives the signal degradation information, determine, according to the received signal degradation information, that the node device where the device is located generates a signal degradation, and the node device includes a signal degradation.
  • the processing device is configured to: determine, when the node device generates a signal degradation alarm, determine a type of the generated signal degradation alarm, and if the determined type is a forward error notification FEI alarm, control the node device to generate an interface alarm. And if the determined type is a degraded SD alarm, the node device is configured to perform tunnel switching.
  • the signal degradation processing device is configured with a detection submodule:
  • the signal degradation processing device is specifically configured to determine that the node device generates a signal degradation alarm when the detection sub-module detects that the span packet rate of the node device belongs to a higher than a first set value.
  • the signal degradation processing device is specifically configured to receive signal degradation information, and determine that the node device generates a signal degradation alarm according to the received signal degradation information.
  • the signal degradation processing device is configured to receive the signal degradation information reported by the interface module in the node device, where the signal degradation information is that the detection module of the interface module detects the span of the node device When the packet error rate is higher than the second set value, according to its own configuration information, or
  • the node device includes at least two signal degradation processing devices, wherein the first signal is degraded
  • the device is specifically configured to receive the signal degradation information reported by the second signal degradation processing device, where the signal degradation information is after the second signal degradation processing device determines the type of the signal degradation alarm, and the first signal degradation processing device cannot implement the Reported when the tunnel is switched; or,
  • the signal degradation processing device is specifically configured to receive the signal degradation information reported by the operation management and maintenance OAM module in the node device after receiving the signal degradation processing information sent by the non-head node device in the tunnel.
  • the signal degradation processing device is integrated in a segment layer TMS module in the node device, and the signal degradation processing device is further configured to notify an OAM module in the node device to indicate a TMS OAM sub-module in the OAM module.
  • the module advertises a signal degradation alarm at the TMS layer.
  • the signal degradation processing device is integrated in a TMS module in the node device, and the signal degradation processing device is further configured to determine whether the TMS module is in a ring network protection, and if yes, notify a channel in the node device
  • the Tunnel Group sub-module in the layer TMP module performs tunnel switching, and ends the processing flow when the handover succeeds.
  • the signal degradation information is sent to the TMP module.
  • the signal degradation processing device is integrated in a TMS module in the node device, and the signal degradation processing device is further configured to require a tunnel layer TMC module in the node device to perform tunnel switching.
  • the signal degradation processing device is integrated in the TMP module in the node device, and the signal degradation processing device is further configured to notify the OAM module in the node device, indicating that the TMP OAM submodule in the OAM module is advertised in the TMP
  • the layer generates a signal degradation alarm.
  • the signal degradation processing device is integrated in the TMP module in the node device, and the signal degradation processing device is configured to determine whether the Tunnel sub-module in the TMP module is in linear tunnel protection, and if yes, notify the TMP
  • the tunnel group submodule in the module performs tunnel switching, and ends the processing flow when the handover succeeds. The handover fails or is determined.
  • the signal degradation processing device is sent to the TMC module, and the signal degradation processing device is integrated in the UI module in the node device, and the signal degradation processing device is further configured to request the TMC.
  • the module performs tunnel switching.
  • the signal degradation processing device is integrated in a TMC module in the node device, and the signal degradation processing device is further configured to notify a UI module in the node device, and instruct the TMC module in the UI module to advertise A signal degradation alarm is generated at the TMC layer.
  • the signal degradation processing device is integrated in a TMC module in the node device, and the signal degradation processing device is further configured to notify the pseudowire redundancy group to perform tunnel switching.
  • the signal degradation processing device is specifically configured to determine that the node device generates a signal degradation alarm according to the signal degradation processing information reported by the UI module within a set duration.
  • the signal degradation processing may be performed on different types of signal degradation alarms according to the type of the signal degradation alarm, if the type is FEI alarm Then, an interface alarm is generated and the processing flow is ended. If the type is an SD alarm, tunnel switching is performed, so that when signal degradation occurs in the node, processing for signal degradation is implemented.
  • FIG. 1 is a schematic flowchart of a signal degradation processing method according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of a signal degradation processing apparatus according to Embodiment 2 of the present invention
  • FIG. 3 is a schematic diagram of a T-MPLS network model in the prior art
  • FIG. 4 is a schematic diagram of an application scenario network topology of a signal degradation processing method according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic flowchart of a signal degradation processing method according to Embodiment 3 of the present invention
  • FIG. 7 is a schematic structural diagram of a node device according to Embodiment 5 of the present invention
  • FIG. 8 is a schematic structural diagram of a node device according to Embodiment 6 of the present invention.
  • Embodiment 1 In the prior art, in the process of information transmission using the T-MPLS technology, there is no problem related to signal degradation, and the embodiment of the present invention provides a processing method for signal degradation.
  • Embodiment 1 In the prior art, in the process of information transmission using the T-MPLS technology, there is no problem related to signal degradation, and the embodiment of the present invention provides a processing method for signal degradation.
  • FIG. 1 is a flowchart of the steps of the method. As shown in FIG. 1, the method specifically includes:
  • Step 001 The node device determines to generate a signal degradation alarm.
  • the node device can determine the signal degradation alarm generated by:
  • the node device determines to generate a signal degradation alarm when detecting that the packet error rate of the span to which it belongs is higher than the first set value.
  • the node device receives the signal degradation information, and determines to generate a signal degradation alarm according to the received signal degradation information.
  • Step 002 The node device determines the type of the generated signal degradation alarm.
  • Step 003 The node device performs signal degradation processing.
  • the step specifically includes: if the determined type is an FEI alarm, the node device generates an interface alarm and ends the processing flow. If the determined type is an SD alarm, the node device performs tunnel switching.
  • the second embodiment of the present invention further provides a signal degradation processing device
  • FIG. 2 is a schematic structural diagram of the device.
  • the device specifically includes:
  • the alarm determining module 01 is configured to determine that the node device where the device is located generates a signal degradation alarm;
  • a type determining module 02 configured to determine a type of the signal degradation alarm determined by the alarm determining module
  • the alarm processing module 03 is configured to: when the type determined by the type determining module is an FEI alarm, control a node device where the device is located to generate an interface alarm and end the processing flow, where the type determined by the type determining module is When the SD alarm occurs, the node device where the device is located is controlled to perform tunnel switching.
  • the alarm determining module 01 may specifically include:
  • the detecting submodule 011 is configured to determine whether a packet error rate of the span device to which the device is located is higher than a first set value
  • the alarm determining sub-module 012 is configured to determine that the node device where the device is located generates a signal degradation alarm when the detecting sub-module determines that the span packet rate of the node where the device is located is higher than the first set value.
  • the alarm determination module 01 may further include:
  • the receiving submodule 013 is configured to receive signal degradation information
  • the alarm determining sub-module 012 may be further configured to: when the receiving sub-module receives the signal degradation information, determine, according to the received signal degradation information, that the node device where the device is located generates a signal degradation alarm.
  • the T-MPLS network model is shown in FIG. 3, including an application layer (Client Server), a path layer (TMC, T-MPLS Channel), a channel layer (TMP, T-MPLS Path), and a segment layer (TMS). , T-MPLS Section) and interface layer (PHY MEDIA), corresponding to the path layer, channel layer, segment layer and interface layer respectively, a node of the T-MPLS network may include a TMC module, a TMP module, a TMS module and an interface Module.
  • the node further includes an OAM module for performing end-to-end operation, management, and maintenance, and the TMP Modules can include a Tunnel submodule and a Tunnel Group submodule. If the node is a non-head node in the tunnel to which it belongs, the TMC layer is not included in the node, and there is no entity configuration of the TMC module.
  • the signal degradation information may be reported in the interface layer, the TMS layer, the TMP layer, and the TMC layer of the head node and the non-head node in the tunnel, respectively.
  • Signal degradation is processed at the TMS layer, the TMP layer, and the TMC layer.
  • the application scenario network topology diagram of the signal degradation processing method according to the first embodiment of the present invention includes a switchable working tunnel and a protection tunnel (Tunnel 1 and Tunnel 2), and both Tunnell and Tunnel 2 are two-way static tunnels.
  • the node 201 includes a node 201, a node 202, a node 203, and a node 205.
  • the node 201 and the node 205 are Tunnell's head nodes
  • the node 202 and the node 203 are Tunnell's non-head nodes
  • the tunnel 2 includes the node 201, the node 204, and the node 205.
  • node 201 and node 205 are the head nodes of Tunnel 2
  • node 204 is the non-head node of Tunnel 2.
  • Tunnell includes the span 1 between the node 201 and the node 202, the span 2 between the node 202 and the node 203, and the span 3 between the node 203 and the node 205; the node 2 includes the node 201 and the node 204 Across section 4, and a span 5 between node 204 and node 205.
  • the way in which the head node and the non-head node in the tunnel perform signal degradation processing is different.
  • both the node 201 and the node 202 perform signal degradation processing, since the node 201 and the node 202 are in the Tunnell as a head node (node 201). ), one is a non-head node (node 202), and therefore, the manner in which the node 201 and the node 202 perform signal degradation processing is different.
  • the signal degradation processing method provided by the first embodiment of the present invention will be described in detail below by taking the node 201 (head node) and the node 202 (non-head node) as an example.
  • Embodiment 3 Taking the head node 201 of the tunnel in FIG. 4 as an example, the third embodiment of the present invention provides a signal degradation processing method, and FIG. 5 is a schematic flowchart of the steps of the method. As shown in FIG. 5, the method specifically includes:
  • Step 101 The processing module determines that a signal degradation alarm is generated.
  • the processing module can be a TMS module, a TMP module, or a TMC module. That is, in the present embodiment, the signal degradation processing apparatus involved in the second embodiment is integrated in at least one of the TMS module, the TMP module, and the TMC module.
  • the function of the processing module involved in this embodiment can be regarded as a function of the signal degradation processing apparatus.
  • the processing module can determine that a signal degradation alarm is generated by:
  • the first type when the detection sub-module configured by the processing module itself detects that the inter-segment error rate of the node where the processing module is located is higher than the first set value, determines that a signal degradation alarm is generated.
  • the cause of signal degradation is packet loss caused by bit error of the line (interface layer, such as fiber, copper or wireless). For each bit of each tunnel passing through the line, the probability of error occurrence is equal. It is an almost completely random packet loss. Therefore, for the packet loss caused by the line error, the error rate of the line corresponding to one span is approximately equal to the error rate of the span in the tunnel. If the average packet length of the line and the average packet length of the tunnel are approximately equal, the error packet rate of the line corresponding to one span is approximately equal to the packet error rate of the span in the tunnel. Therefore, for a node, it can be determined whether signal degradation occurs at the node by detecting the packet error rate of the span to which the node belongs.
  • FCS frame check sequence
  • Packet error rate number of FCS error packets detected during t0 cycle / total number of packets received within 10 cycles
  • the number of FCS error packets includes FCS error frame, super long frame number, and too small frame number.
  • T0 cycle can be Set to 1 second. In the set t0 period, if the packet error rate is higher than the set ratio rl, rl can be set to 1-7 to determine that a signal degradation alarm has occurred.
  • the first alarm with a lower alarm level is generated, such as a forward error indication (FEI) alarm, and the packet error rate is high.
  • FEI forward error indication
  • r2 can be set to 1-6 , which is regarded as generating a second alarm with a higher alarm level, such as a Degraded (SD, Signal Degrade) alarm.
  • SD Degraded
  • the first alarm is used in each of the following embodiments.
  • the FEI alarm is generated, and the second alarm is an SD alarm as an example.
  • the number of FCS error packets can be detected between any two adjacent nodes of Tunnell and Tunnel2 shown in Figure 2 to determine whether signal degradation has occurred in each node.
  • the TMP module may use a LM (Loss Measurement Function) module as a detection sub-module, and the LM module carries the statistical information of the physical port of the Ethernet network (including the detection during the t0 period).
  • the number of FCS error packets, the total number of packets received during the t0 period, and the TMP OAM sub-module periodically acquires the statistics and performs calculations to determine whether signal degradation has occurred in the node.
  • the second processing module receives the signal degradation information.
  • the processing module does not configure the detection submodule, it determines that the signal degradation alarm is generated according to the received signal degradation information.
  • the signal degradation information may be carried in an FEI message.
  • the source of the signal degradation information may be any one of the following three sources: Mode 1: The signal degradation information may be reported by an interface module of a node where the processing module is located. Specifically, when the detecting submodule configured in the interface module detects that the inter-segment error rate of the node where the interface module belongs is higher than the second set value, the interface module may determine the corresponding processing module according to the configuration information of the interface, and The determined processing module that reports the signal degradation information. For example, when the corresponding processing module configured on the interface module is a TMS module, the determined TMS module reported by the signal degradation information, and the corresponding processing module configured on the interface module is a TMP module, the signal degradation information is The identified TMP module is reported. Manner 2: The signal degradation information is sent by the first processing module when the second processing module determines the type of the signal degradation alarm.
  • TMS module second processing module
  • signal degradation information will be sent to the TMP module (first processing module).
  • the signal degradation information is sent by the OAM module after receiving the signal degradation information sent by the non-head node in the tunnel, where the tunnel is a tunnel to which the node where the processing module belongs.
  • the non-header node in the tunnel does not include the TMC layer and does not include the physical configuration of the TMC module.
  • the OAM module in the non-head node is notified to the non-head node.
  • the reverse direction head node in which the alarm occurs in the tunnel transmits signal degradation processing information.
  • the OAM module in the non-head node sends the signal degradation processing information to the OAM module in the reverse direction head node, and the OAM module in the reverse direction head node may use the received signal degradation processing information to The processing module in the reverse direction head node, such as the TMP module, transmits signal degradation information.
  • Step 102 The processing module determines a type of the signal degradation alarm.
  • the processing module may determine the type of the signal degradation alarm according to the span packet error rate of the node where the processing module belongs. It can be determined whether the packet error rate is higher than a set threshold. If the value is higher than the set first threshold, the type of the signal degradation alarm can be determined to be an FEI alarm. If the value is higher than the set second threshold, the identifier can be determined. The type of the signal degradation alarm is an SD alarm, and the first threshold is smaller than the second threshold.
  • the threshold values for FEI alarms and SD alarms must be set in the interface module (such as SDH/ETH), TMS module, TMP module, and TMC module.
  • the type of the signal degradation alarm may be determined according to an alarm type identifier in the FEI packet, such as an SD identifier, and specifically, may be set.
  • An SD flag of 0 indicates that the type of the signal degradation alarm is an FEI alarm
  • an SD flag of 1 indicates that the type of the signal degradation alarm is an SD alarm.
  • the processing module when it is a TMP module, it can pass through the TMP module.
  • the tunnel submodule determines the type of the signal degradation alarm.
  • Step 103 The processing module performs signal degradation processing according to the type of the signal degradation alarm. In this step, if the type determined in step 102 is an FEI alarm, the processing module generates an interface alarm and ends the processing flow. If the type is an SD alarm, the processing module performs tunnel switching.
  • the processing module when the processing module is a TMS module, the processing module performs tunnel switching, which specifically includes:
  • the TMS module determines whether it is in the ring network protection. If yes, it notifies the Tunnel Group submodule in the TMP module to perform tunnel switching, and ends the process when the handover succeeds. The handover fails or determines that the TMS module is not in ring protection. In the middle, the signal degradation information is sent to the TMP module.
  • the processing module When the processing module is a TMP module, the processing module performs tunnel switching, which specifically includes:
  • the tunnel sub-module in the TMP module determines whether it is in the linear tunnel protection: If yes, the tunnel group sub-module is notified to perform tunnel switching, and the processing flow ends when the handover succeeds;
  • the signal degradation information can be sent to the TMC layer.
  • the proxy module After receiving the SD alarm, the proxy module notifies the tunnel group sub-module to perform the tunnel switching, which includes: after receiving the SD alarm, the proxy module notifies the corresponding switching algorithm module, such as automatic protection switching (APS, Auto Protect Switch), and After obtaining the corresponding switching policy by using the switching algorithm module, the Tunnel Grou sub-module is notified to perform tunnel switching.
  • the processing module is a TMC module
  • the processing module performs tunnel switching, which specifically includes:
  • the TMC module notifies the PW (Pseudowire) redundancy group to perform tunnel switching.
  • the TMP module When the tunnel group sub-module cannot be tunnel-switched, in the first and second cases, the TMP module will switch to the TMC module when it needs to perform tunnel switching according to the requirements of the TMS module or according to the requirements of the TMP module itself.
  • the signal degradation information is sent, and the TMC module is required to perform tunnel switching.
  • the TMP module may send service layer signal degradation (SSD, Servise Signal Degrade) information to the TMC module.
  • SSD Service layer signal degradation
  • the method may further include:
  • Step 102 The OAM module advertises that a signal degradation alarm is generated.
  • the step includes: the TMS module notifying the OAM module, and requesting the TMS OAM sub-module in the OAM module to notify the TMS layer that a signal degradation alarm is generated.
  • the step specifically includes: the TMP module notifying the OAM module, and requesting the TMP OAM sub-module in the OAM module to notify the TMP layer that a signal degradation alarm is generated.
  • the step specifically includes: the TMC module notifying the OAM module that the TMC OAM sub-module in the OAM module is notified to generate a signal degradation alarm at the TMC layer.
  • Embodiment 3 of the present invention when signal degradation occurs in a head node in a tunnel, signal degradation processing can be implemented by using its own TMS module, TMP module, and TMC module, and corresponding signals can be performed according to the type of signal degradation alarm. Deterioration processing.
  • Embodiment 3 of the present invention also provides various ways to determine that a signal degradation alarm is generated.
  • the OAM module in the third embodiment of the present invention can also notify the signal degradation alarm generated at each layer.
  • FIG. 6 is a schematic flowchart of the method. As shown in FIG. 6, the method includes:
  • Step 201 The processing module determines that a signal degradation alarm is generated.
  • the processing module may be a TMS module or a TMP module.
  • the signal degradation processing device involved in the second embodiment is integrated in the TMS module and/or the TMP module.
  • the function of the processing module involved in this embodiment can be regarded as a function of the signal degradation processing means.
  • processing module determines that the signal degradation alarm is generated is the same as that described in step 101 of the first embodiment, and details are not described herein again.
  • Step 202 The processing module determines a type of the signal degradation alarm.
  • the method for determining the type of the signal degradation alarm in each embodiment of the present embodiment is the same as the method described in the step 102 of the embodiment, and details are not described herein again.
  • Step 203 The processing module performs signal degradation processing according to the type of the signal degradation alarm.
  • the specific method for the TMS module to perform the tunnel switching is the same as the specific method for the TMS module to perform the tunnel switching in the first step 103, and details are not described herein again.
  • the tunnel switching of the TMP module includes:
  • the tunnel sub-module in the TMP module determines whether it is in the linear tunnel protection: If yes, the tunnel group sub-module is notified to perform tunnel switching, and the processing flow ends when the handover succeeds;
  • the switch fails or determines that the tunnel sub-module is not in the linear tunnel protection, because the node where the tunnel sub-module is located is a non-head node, in this step, the OAM module can be notified that the alarm is generated in the tunnel to which the non-head node belongs.
  • the direction head node sends a signal degradation processing signal
  • the relevant module in the head node is required to perform a tunnel switching operation.
  • the non-head node is a node
  • node 202 may send signal degradation processing information to node 205.
  • the TMP module can notify the OAM module to generate an alarm to the tunnel to which the non-head node belongs when the tunnel is required to be switched according to the requirements of the TMS module or the TMP module.
  • the reverse direction head node sends signal degradation processing information, and the relevant module in the head node is required to perform a tunnel switching operation.
  • the TMP module can send the signal degradation processing information to the TMC module through the SSD information.
  • the non-head node may send the signal degradation information to the designated head node at the set period t1, and the default value of t1 is 1 second. It may also be set that once the handover fails or it is determined that the tunnel sub-module is not in the linear tunnel protection, Signal degradation processing information is transmitted to the designated head node.
  • the effective time of the signal degradation processing information in the head node may be 3*tl, that is, in the time of 3*tl. If the head node does not receive the signal degradation processing information that is sent by the non-head node again, the signal degradation processing may be performed according to the signal degradation processing information received last time, and if the time exceeds 3*tl, the non-head is still not received. If the signal degradation processing information sent by the node is re-sent, the head node considers that the signal degradation of the non-head node disappears, and generates a notification that the corresponding signal degradation alarm disappears.
  • the method may further include:
  • Step 202 The OAM module advertises that a signal degradation alarm is generated.
  • the method for generating the signal degradation alarm notification by the OAM module is the same as that of the step 102 in the first embodiment, and details are not described herein again.
  • the TMS module and the TMP module in the non-head node may be used to perform signal degradation processing.
  • the signal degradation process may be implemented by using a head node that is in the same tunnel as the non-head node and opposite to the alarm direction when the signal degradation process cannot be completed by itself.
  • Embodiment 3 of the present invention is based on the same inventive concept, and the present invention provides the following node device.
  • Embodiment 5 is based on the same inventive concept, and the present invention provides the following node device.
  • the fifth embodiment of the present invention provides a node device, which corresponds to the function of the head node in the third embodiment.
  • the node device includes a path layer TMC module 11, a channel layer TMP module 12, and a segment layer TMS module. 13.
  • the interface module 14 and the operation management and maintenance OAM module 15, the TMC module 11, the TMP module 12, and the TMS module 13 can be used as a processing module: the processing module is configured to determine that a signal degradation alarm is generated, and the signal degradation alarm is determined. If the type is the first alarm, an interface alarm is generated and the processing flow is ended. If the type is the second alarm, the tunnel is switched.
  • the processing module may be configured with a detection submodule:
  • the detecting submodule configured in the processing module is configured to determine that a signal degradation alarm is generated when detecting that the packet error rate of the span of the node where the processing module is located is higher than the first set value.
  • the processing module is specifically configured to receive the signal degradation information.
  • the processing module itself does not configure the detection submodule, determining that the signal degradation alarm is generated according to the received signal degradation information.
  • the processing module is specifically configured to receive the signal degradation information reported by the interface module, where the signal degradation information is that the detection module of the interface module detects that the inter-segment error rate of the node where the interface module belongs is higher than the second set value.
  • the processing module is configured to receive the signal degradation information reported by the other processing module, where the signal degradation information is determined by another processing module to determine the type of the signal degradation alarm. The module itself cannot report the result when the tunnel is switched; or
  • the processing module is specifically configured to receive signal degradation information reported by the OAM module after receiving the signal degradation processing information sent by the non-head node in the tunnel.
  • the OAM module 15 may include a TMS OAM submodule 151, a TMP OAM submodule 152, and a TMC OAM submodule 153.
  • the TMP module 12 includes a tunnel group sub-module 121 and a tunnel sub-module 122.
  • the TMS module 13 is further configured to notify the OAM module that the TMS OAM sub-module in the OAM module is required to notify that a signal degradation alarm is generated at the TMS layer.
  • the TMS module 13 is further configured to determine whether it is in the ring network protection. If yes, notify the Tunnel Grou sub-module in the TMP module to perform tunnel switching, and terminate the processing flow when the handover succeeds, failing or determining the handover. When the TMS module is not in the ring network protection, it sends signal degradation information to the TMP module.
  • the TMS module 13 is further configured to require the TMC module to perform tunnel switching.
  • the tunnel sub-module 122 is configured to determine the type of the signal degradation alarm.
  • the TMP module 12 is further configured to notify the OAM module that the TMP OAM sub-module in the OAM module is required to notify that a signal degradation alarm is generated at the TMP layer.
  • the tunnel sub-module 122 is configured to determine whether it is in the linear tunnel protection. If yes, the tunnel group sub-module is notified to perform tunnel switching, and when the handover succeeds, the processing flow ends, and the handover fails or determines that it is not in linear tunnel protection. In the middle, the signal degradation information is sent to the TMC module.
  • the TMP module 12 is also arranged to require the TMC module to perform tunnel switching.
  • the TMC module 11 is further configured to notify the OAM module that the OAM module is required
  • the TMC OAM sub-module advertises a signal degradation alarm at the TMC layer.
  • the TMC module 11 is further configured to notify the pseudowire redundancy group to perform tunnel switching.
  • the OAM module 15 is configured to report signal degradation information according to the signal degradation processing information received within the set duration.
  • Embodiment 6 is configured to report signal degradation information according to the signal degradation processing information received within the set duration.
  • Embodiment 6 of the present invention provides a node device, and the function of the non-head node in the fourth embodiment
  • the node device includes a channel layer TMP module 21, a segment layer TMS module 22, an interface module 23, and an operation management and maintenance OAM module 24, and any one of the TMP module 21 and the TMS module 22 can be processed.
  • the processing module is configured to determine that a signal degradation alarm is generated, and determine a type of the signal degradation alarm. If the type is the first alarm, generate an interface alarm and end the processing flow. If the type is the second alarm, perform the processing. Tunnel switching.
  • the TMP module 21 includes a tunnel Grou submodule 211 and a tunnel submodule 212;
  • the tunnel sub-module 212 is configured to determine whether it is in the linear tunnel protection. If yes, notify the tunnel group sub-module to perform tunnel switching, and terminate the processing flow when the handover succeeds. The handover fails or determines that the tunnel sub-module is not linear. During tunnel protection, the OAM module is notified to send signal degradation processing information to the reverse head node device in the tunnel to which the node device belongs.
  • the TMP module 21 is further configured to notify the OAM module to send signal degradation processing information to the reverse head node device that generates an alarm in the tunnel to which the node device belongs.
  • the OAM module 24 may include a TMS OAM submodule 241 and a TMP OAM submodule 242.
  • the other modules in this embodiment have the same functions as the corresponding modules in the node device provided in the fifth embodiment, and details are not described herein again.
  • the node device provided in Embodiment 5 and Embodiment 6 of the present invention may be two independent devices, and the corresponding functional modules provided in Embodiment 5 and Embodiment 6 may be integrated in one node device, so that the node device is in the tunnel. Can be used as a head node or as a non-head node.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé de traitement de dégradation de signal comprenant les opérations suivantes : un dispositif de nœud détermine s'il faut ou non produire une alarme de dégradation de signal ; le dispositif de nœud détermine le type de l'alarme de dégradation de signal produite ; si le type déterminé est une alarme d'insertion d'erreur de transfert (FEI), alors le dispositif de nœud produit une alarme d'interface ; et si le type déterminé est une alarme de dégradation de signal (SD), alors le dispositif de nœud réalise une commutation de tunnel. L'invention concerne également de manière correspondante un dispositif et un dispositif de nœud de traitement de dégradation de signal. Lors de la détermination du fait qu'une alarme de dégradation de signal est produite dans un nœud, un module de traitement peut réaliser respectivement un traitement de dégradation de signal sur différents types d'alarmes de dégradation de signal selon le type de l'alarme de dégradation de signal, si le type est une alarme FEI, alors production d'une alarme d'interface et arrêt du flux de traitement, et si le type est une alarme SD, alors réalisation d'une commutation de tunnel, réalisant ainsi le traitement visant une dégradation de signal lorsqu'une dégradation de signal est produite dans un nœud.
PCT/CN2012/073934 2011-06-08 2012-04-12 Procédé, dispositif et dispositif de nœud de traitement de dégradation de signal WO2012167667A1 (fr)

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