WO2008148334A1 - Procédé, système et appareil pour détecter la réception anormale d'un message - Google Patents

Procédé, système et appareil pour détecter la réception anormale d'un message Download PDF

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Publication number
WO2008148334A1
WO2008148334A1 PCT/CN2008/071071 CN2008071071W WO2008148334A1 WO 2008148334 A1 WO2008148334 A1 WO 2008148334A1 CN 2008071071 W CN2008071071 W CN 2008071071W WO 2008148334 A1 WO2008148334 A1 WO 2008148334A1
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WIPO (PCT)
Prior art keywords
receiving
fault detection
packet
message
sequence number
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PCT/CN2008/071071
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English (en)
Chinese (zh)
Inventor
Lei Wang
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008148334A1 publication Critical patent/WO2008148334A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC

Definitions

  • the embodiments of the present invention relate to the field of network communication technologies, and in particular, to a method, system, and apparatus for detecting abnormality of message reception. Background technique
  • OAM Operaation Administration and Maintenance
  • the mechanism has achieved great success in reducing network maintenance costs.
  • the ⁇ function ensures that the network operator fulfills the QoS (Quality of Service) guarantee commitment, detects and isolates and circumvents network defects before abnormal events are intensified, enabling operators to provide service level agreements as promised. Therefore, OAM functionality is critical to the ease of operation of public networks, verifying network performance, and reducing operational costs, especially for networks that require measurable network performance and availability goals.
  • the fault detection type of the OAM mechanism is very limited, and the sequence of the packets cannot be detected.
  • the detection of the sequence of the packets is of practical significance, because some services require that the packets arrive in order, and the packets are quickly detected. Defects in the order can also quickly find problems.
  • the out-of-order information is detected in time to assist other routing protocols to diagnose some faults of the network. For example, if there is no load balancing or backup link, if the packet is out of order, the device itself has a problem. If the tunnel backup link is set on the link, the device itself guarantees the packet.
  • the final destination detects out-of-order packets, and it can be determined that the primary link is frequently switched, and the link is in an unstable state.
  • the disadvantage of the prior art is that there is no detection mechanism for out-of-order defects, and the real-time packet disorder and packet packet loss detection cannot be performed on the link, so that some faults in the network cannot be diagnosed in time.
  • the embodiment of the invention provides a method, a system and a device for detecting a packet receiving abnormality, so as to implement real-time packet receiving abnormality detection on a link.
  • the technical solution of the embodiment of the present invention provides a method for detecting a packet receiving abnormality, which includes the following steps: receiving a first receiving fault detection packet and a second receiving fault detection packet sent by a source end, where The second receiving fault detection message is a receiving fault detecting message that is received immediately after the first receiving the fault detecting message, where the first receiving fault detecting message carries a first sequence number, and the second receiving The fault detection packet carries a second sequence number; the first sequence number and the second sequence number are obtained from the received first received fault detection message and the second received fault detection message respectively And determining, according to the size of the first and second serial numbers, whether a message reception exception occurs.
  • the technical solution of the embodiment of the present invention further provides a detection system for receiving an abnormality of a packet, including at least one source end and at least one sink end, where the source end is configured to sequentially send and receive a fault detection packet to the sink end.
  • the sink end is configured to receive the first receiving fault sent by the source end a detection packet and a second reception failure detection message, wherein the second reception failure detection message is a reception failure detection message received immediately after the first receiving the failure detection message, and is received from the received Obtaining the first serial number and the second serial number in the first receiving fault detection message and the second receiving fault detecting message, and determining whether a report occurs according to the size of the first and second serial numbers
  • the text received an exception is
  • the technical solution of the embodiment of the present invention further provides a source end, which includes a message generating module, a serial number assigning module, and a packet sending module, where the packet generating module is used for Generating the received fault detection message carrying the sequence number; the sequence number assigning module is configured to allocate a sequence number according to the sending sequence of the received fault detection message; the message sending module is configured to The sink sends the receiving fault detection message carrying the serial number in sequence.
  • the technical solution of the embodiment of the present invention further provides a sink, configured to cooperate with the source end to detect a packet receiving abnormality, including a packet receiving module, a serial number acquiring module, and a receiving abnormality detecting module, where the packet is received.
  • a module configured to receive a first receiving fault detection message and a second receiving fault detection message sent by the source end, where the second receiving fault detection message is received immediately after the first receiving fault detection message
  • Receiving a fault detection message the first receiving fault detection message carries a first sequence number, and the second receiving fault detection message carries a second sequence number
  • the sequence number obtaining module is used to Acquiring the first sequence number and the second sequence number in the first receiving failure detection message and the second receiving failure detection message received by the packet receiving module
  • the receiving abnormality detecting module configured to The size of the first and second serial numbers is used to determine whether a message reception exception occurs.
  • the source end adds a sequence number to the received fault detection message, and the sink end determines the sequence of the sequence number in the received fault detection message to determine whether the packet is out of order and the packet is lost.
  • the defect overcomes the problem that the packet disorder is not detected in the prior art, and the technical effect of the real-time out-of-order defect detection on the link is achieved.
  • the sequence number added in the received fault detection packet sent by the source end in the embodiment of the present invention receives the sequence defect of the receiving fault detection message, and achieves the purpose of real-time detection of the packet out-of-order.
  • FIG. 1 is a structural diagram of a detection system for receiving an abnormality of a message according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for detecting an abnormality of a packet receiving abnormality according to Embodiment 1 of the present invention
  • FIG. 3 is a packet receiving method according to Embodiment 2 of the present invention
  • FIG. 4 is a flowchart of a method for detecting a packet reception abnormality according to Embodiment 3 of the present invention.
  • FIG. 1 it is a structural diagram of a detection system for receiving an abnormality of a message according to an embodiment of the present invention.
  • the detection system of the packet receiving abnormality includes at least one source end 1 and at least one sink end 2, and the source end 1 is configured to sequentially send and receive the fault detection message to the sink end 2, and add in the receiving fault detection message.
  • the sink terminal 2 is configured to receive the first receiving fault detection message and the second receiving fault detection message sent by the source end 1, and Obtaining a first sequence number and a second sequence number from the received first received fault detection message and the second received fault detection message, and determining whether a packet receiving abnormality occurs according to the size of the first and second serial numbers .
  • the first receiving fault detection packet and the second receiving fault detection packet mentioned in the embodiment of the present invention are only for convenience of description.
  • the embodiment of the present invention determines by comparing the serial numbers carried by two adjacent receiving fault detection messages. Whether or not a reception failure occurs, the embodiment of the present invention is not limited to performing reception failure detection by using the first reception failure detection message and the second reception failure detection message.
  • the source end 1 includes a message generating module 11, a serial number assigning module 12, and a message sending module 13, wherein the message generating module 11 is configured to generate a receiving fault detection message carrying a sequence number; The sequence number is allocated in the order in which the received fault detection messages are sent.
  • the message sending module 13 is configured to send the received fault detection message carrying the sequence number to the sink terminal 2 in sequence.
  • the packet generation module 11 generates a reception failure detection message carrying the sequence number, and the sequence number assignment module 12 allocates a sequence number according to the transmission sequence of the reception failure detection message carrying the sequence number, and the message transmission module 13
  • the serial number assignment module 12 assigns the serial number of the received failure detection message to the sink terminal 2 in sequence.
  • the embodiment of the present invention can be generated by any submodule of the message generating module 11.
  • the receiving fault detection packet carrying the serial number carrying the serial number.
  • the following is a sub-module for generating a receiving fault detection message carrying a sequence number, which is an implementation of the OAM mechanism fault detection text according to the embodiment of the present invention.
  • the present invention cannot be considered as implementing the present invention.
  • a receiving fault detection packet carrying a sequence number can be generated only by using the OAM mechanism fault detection packet.
  • the message generation module 11 includes an extension definition sub-module 111, which is used to re-divide the original field of the OAM mechanism fault detection message into a part of the sequence number field to carry the sequence number.
  • an extension definition sub-module 111 which is used to re-divide the original field of the OAM mechanism fault detection message into a part of the sequence number field to carry the sequence number.
  • CV Connective Verification Packet
  • the original field padding portion of the 18octets of the OAM mechanism fault detection message is re-divided into a part of 8 octets as a sequence number field to carry the sequence number.
  • the original CV packet carries the sequence number to keep the packet length unchanged, so the network does not increase the burden.
  • the message generating module 11 includes a message lengthening sub-module 112 for lengthening the OAM mechanism fault detection message and adding a sequence to the extended portion of the OAM mechanism fault detection message.
  • the number field to carry the serial number For example, the OAM mechanism uses the structure of the extended CV packet to carry the sequence number. On the basis of retaining the original OAM function, the OAM mechanism fault detection packet is lengthened, and the sequence number field is added to the length of the OAM mechanism fault detection packet.
  • Carry the serial number for example, add a sequence number of 10 octets at the end of the original OAM mechanism fault detection message to carry the sequence number, including the sequence number of 8 octes and the check portion of the 2 octets BIP 16 sequence number.
  • the serial number verification part carries the same content as the serial number part, and after receiving the message, the serial number part is verified to prevent the serial number part from being changed during the transmission process, thereby preventing the original The 4th order of the correct order is disordered because the serial number part is changed.
  • the packet generation module 11 includes a message new sub-module 113 for constructing a reception fault detection report carrying a sequence number according to the structure of the OAM mechanism failure detection message. Text. For example, the function type of receiving the fault detection message is set to 02Hex.
  • the sink 2 includes a message receiving module 21, a sequence number obtaining module 22 and a receiving anomaly detecting module 23, and the message receiving module 21 is configured to receive the first source 1 Receiving the fault detection message and the second receiving fault detection message, wherein the second receiving fault detection message is a receiving fault detection message received immediately after the first receiving the fault detection message, and the first receiving fault detection message carries There is a first serial number, the second receiving fault detection message carries a second serial number; the serial number obtaining module 22 is configured to receive the first receiving fault detection message and the second receiving fault detection message from the message receiving module 21 The first sequence number and the second sequence number are obtained in the text; the receiving abnormality detecting module 23 is configured to determine whether a message receiving abnormality occurs according to the sizes of the first and second serial numbers.
  • the receiving abnormality detecting module 23 includes a message out-of-order judging sub-module 231, configured to determine that the packet out-of-order occurs when the first serial number is greater than the second serial number, and determine that the message is out of order, wherein the loose mode only requires phase
  • the sequence number carried by the second receiving fault detection packet in the two receiving fault detection packets is greater than the sequence number carried in the first receiving fault detection packet, regardless of the sequence number carried by the second receiving fault detection packet.
  • the number of the serial number carried in the received fault detection message is large, so that it can be judged whether it is out of order, and the defect detected by the loose mode is called a loose disordered defect.
  • sequence of adding the sequence number in the source sending and receiving fault detection message is from large to small, and the sequence number carried by the first receiving fault detection message is greater than the second receiving when the sink end receives the receiving.
  • the serial number carried in the fault detection packet is used to determine whether an out of order occurs.
  • the receiving abnormality detecting module 23 includes a packet loss determining sub-module 232, configured to determine whether the absolute value of the received difference between the first and second serial numbers is greater than the maximum value.
  • the small serial number interval if it is greater than the minimum serial number interval, indicates that packet loss occurs; if both packet out-of-order and packet loss occurs, it is determined that a strict out-of-order defect occurs, and the minimum sequence number interval is
  • the source end is the difference between the serial numbers configured for the two adjacent received fault detection packets. Whether the first serial number is greater than the second serial number or the second serial number is greater than the first serial number, as long as the difference between the two serial numbers is greater than the minimum serial number interval, the packet loss phenomenon occurs.
  • the embodiment of the present invention further provides that after the message out-of-order judging sub-module 231 determines whether the packet is out of order, the packet loss judging sub-module 232 determines whether packet loss occurs, and if both packets are out of order, If a packet loss occurs, it is determined that a strict out-of-order defect has occurred. Therefore, it can be seen from the above description that the packet loss judging sub-module 232 can not only determine whether the packet loss phenomenon occurs independently of the packet out-of-order judging sub-module 231, but also can function simultaneously with the packet scribble judging sub-module 231. First, the message out-of-order judging sub-module 231 determines whether the message is out of order, and then the packet loss judging sub-module 232 determines whether packet loss occurs.
  • the sink 2 further includes an alarm information transmission module 24, configured to report the abnormality of the packet reception through the alarm information transmission protocol packet after the abnormality detection module 23 detects the abnormality of the packet reception. For example, when the abnormality detecting module 23 detects that the packet is out of order or the packet is lost, the unspoken or strict out-of-order is detected, and the loosely-disordered or strict out-of-order defect is reported through the alarm information transmission protocol packet.
  • the priority determination sub-module 241 needs to pass the priority according to the set looseness disorder and the strict disordered priority.
  • the higher-level defect is reported by the alarm information transmission protocol packet. For example, the priority of loosely out-of-order defects is set to the lowest, and the priority of strict out-of-order defects is set to the second lowest. At the same time, loose and disordered defects and strict out-of-order defects are detected, and the priority should be strictly out of order according to the judgment of priority. The defect is reported by the alarm information transmission protocol packet.
  • the priority of strict out-of-order defects can be set to the lowest, and the priority of loose and disordered defects can be set to the lowest.
  • the embodiment of the present invention further proposes a priority setting mode based on the OAM mechanism. Based on the original six defects of the OAM mechanism, the priority of the strict out-of-order defect can be set to a minimum, which will be loose. The priority of the sequence defect is set to the second lowest, so that the fault reporting mechanism of the OAM mechanism only reports the defect with the highest priority, so the newly set loose and disordered defects and strict out-of-order defects will not affect the defects of the original OAM mechanism.
  • the detection of the abnormality of the packet is detected by the detection system of the packet receiving abnormality in the embodiment of the present invention, and the detection of the abnormality of the packet receiving abnormality is realized, and the detection of the strict out-of-order mode can also determine whether the packet is out of order at the same time. And the phenomenon of packet loss. In particular, by setting priorities for loose and disordered defects and strict out-of-order defects, the new out-of-order and packet loss detection will not affect the defects of the original OAM mechanism.
  • FIG. 2 it is a flowchart of a method for detecting an abnormality of a packet receiving abnormality according to the first embodiment of the present invention.
  • only the packet skipping phenomenon is detected in the packet receiving, including:
  • the sink receiving the first receiving fault detection packet and the second receiving fault detection packet sent by the source end, where the second receiving fault detection packet is the receiving fault detection report received immediately after the first receiving the fault detection packet
  • the first receiving fault detection message carries a first sequence number
  • the second receiving fault detection message carries a second sequence number.
  • the first receiving fault detection packet and the second receiving fault detection packet mentioned in the embodiment of the present invention are only for convenience of description.
  • the embodiment of the present invention compares the serial numbers carried by two adjacent receiving fault detection packets.
  • the receiving fault detection packet can be defined or modified by the original OAM mechanism fault detection packet extension or a new fault detection packet carrying only the sequence number can be created according to the structure of the original OAM mechanism fault detection message.
  • the first sequence number and the second sequence number are obtained from the received first received fault detection message and the second received fault detection message, respectively.
  • the method of obtaining the sequence number from receiving the fault detection message corresponds to the manner in which the source end adds the sequence number in the received fault detection message.
  • the source end arranges the sequence of the sequence numbers in the received failure detection packet from small to large. If the first sequence number is smaller than the second sequence number, it indicates that the obtained sequence numbers are sorted normally, and are received according to the order sent by the source end, so it should be determined that the message is out of order. If the first sequence number is greater than the second sequence number, it indicates that the message is out of order, and it should be determined that a loose disordered defect occurs, because the second received failure detection message set by the source end is smaller than the first received failure detection message.
  • the sequence number is small, indicating that the second receiving fault detection message is sent first, and the second receiving fault detection message is received at the sink end after the first receiving the fault detection message, so that the message bursting may be indicated.
  • Order should be determined to appear loose and disordered defects.
  • the loose mode only requires that the sequence number carried by the second receiving fault detection message in the two adjacent fault detection messages is greater than the sequence number carried in the first receiving fault detection message, regardless of the second receiving fault detection message.
  • the serial number carried is larger than the serial number carried in the first receiving fault detection message, so that it can be judged whether it is out of order, and thus the defect detected by the loose mode is called loose disordered defect.
  • sequence of adding the sequence number in the source sending and receiving fault detection message is from large to small, and the sequence number carried by the first receiving fault detection message is greater than the second receiving when the sink end receives the receiving.
  • the serial number carried in the fault detection packet is used to determine whether an out of order occurs.
  • the sequence of the serial number in the received failure detection packet sent by the source end is a preferred embodiment.
  • the embodiment of the present invention should not be limited to the sequence from large to small.
  • the arrangement of the numbers and the arrangement of other serial numbers can achieve the object of the present invention, and therefore the arrangement methods of the various serial numbers should be covered by the embodiments of the present invention.
  • the sinking end reports the detected out-of-order defect through the alarm information transmission protocol packet.
  • the defect report is reported by using the original OAM mechanism alarm information transmission protocol packet, and the detected out-of-order defect is reported.
  • the packet detection abnormality detection method in the foregoing embodiment implements real-time detection and monitoring of packet disorder, and can timely detect packet disorder defects on the link.
  • the method for detecting abnormality of packet receiving according to the second embodiment of the present invention is In the embodiment of the present invention, only the packet loss detection phenomenon is detected in the packet receiving, including:
  • the sink receives the first receiving fault detection packet and the second receiving fault detection packet sent by the source end, where the second receiving fault detection packet is the receiving fault detection report received immediately after the first receiving the fault detection packet.
  • the first receiving fault detection message carries a first sequence number
  • the second receiving fault detection message carries a second sequence number.
  • the first receiving fault detection packet and the second receiving fault detection packet mentioned in the embodiment of the present invention are only for convenience of description.
  • the embodiment of the present invention compares the serial numbers carried by two adjacent receiving fault detection packets. In addition, it is not considered that the embodiment of the present invention is limited to receiving fault detection by using the first receiving fault detection message and the second receiving fault detection message.
  • the receiving fault detection packet can be defined or modified by the original OAM mechanism fault detection packet extension or a new fault detection packet carrying only the sequence number can be created according to the structure of the original OAM mechanism fault detection message.
  • S302 Obtain a first sequence number and a second sequence number from the received first received fault detection message and the second received fault detection message, respectively.
  • the method of obtaining the sequence number from receiving the fault detection message corresponds to the manner in which the source end adds the sequence number in the received fault detection message.
  • the embodiment of the present invention further provides a method for determining whether a packet is lost, and determining that packet loss occurs when the difference between the first and second serial numbers is greater than the minimum sequence number interval, where the minimum sequence number interval is
  • the source is the difference between the sequence numbers configured for the two adjacent received fault detection packets. Whether the first sequence number is greater than the second sequence number or the second sequence number is greater than the first sequence number, as long as the difference between the two sequence numbers is greater than the minimum sequence number interval, packet loss occurs. For example, if the source end inserts the sequence number into the receiving fault detection message in the order of increasing integers, the minimum sequence number interval is 1. If the difference between the first and second sequence numbers is greater than 1, it indicates that packet loss occurs. .
  • the source end sends a received fault detection message in the sequence
  • the arrangement of the column numbers from small to large is a preferred embodiment.
  • the embodiments of the present invention are not limited thereto, and the arrangement of the serial numbers from the largest to the smallest and the arrangement of other serial numbers can achieve the object of the present invention.
  • the arrangement of various serial numbers should be covered by the embodiments of the present invention.
  • S304 The sink detects the lost packet defect through the alarm information transmission protocol.
  • the defect report is reported by using the original OAM mechanism alarm information transmission protocol packet, and the detected packet loss defect is reported.
  • the packet detection abnormality detection method in the foregoing embodiment implements real-time detection and monitoring of packet loss, and can timely detect packet loss defects on the link.
  • the method for detecting the abnormality of the packet receiving abnormality includes the following steps:
  • the sink receiving the first receiving fault detection packet and the second receiving fault detection packet sent by the source end, where the second receiving fault detection packet is the receiving fault detection report received immediately after the first receiving the fault detection packet
  • the first receiving fault detection message carries a first sequence number
  • the second receiving fault detection message carries a second sequence number.
  • the first receiving fault detection packet and the second receiving fault detection packet mentioned in the embodiment of the present invention are only for convenience of description.
  • the embodiment of the present invention compares the serial numbers carried by two adjacent receiving fault detection packets.
  • the receiving fault detection packet can be defined or modified by the original OAM mechanism fault detection packet extension or a new fault detection packet carrying only the sequence number can be created according to the structure of the original OAM mechanism fault detection message.
  • the first sequence number and the second sequence number are obtained from the received first received fault detection message and the second received fault detection message, respectively.
  • the method of obtaining the sequence number from receiving the fault detection message and the source end adding the sequence number in the receiving fault detection message The way corresponds.
  • first and second serial numbers Determine, according to the size of the first and second serial numbers, whether message disorder occurs. If the first sequence number is smaller than the second sequence number, it indicates that the obtained sequence numbers are sorted normally, and are received according to the order sent by the source end, so it should be determined that the message is out of order. If the first sequence number is greater than the second sequence number, it indicates that the message is out of order, and it should be determined that there is a loose disordered defect, because the second receiving failure detection message at the source end is smaller than the sequence of the first receiving failure detection message. If the number is small, the second receiving fault detection message is sent first, and the second receiving fault detection message is received after the first receiving fault detection message, so that the message is out of order. It should be determined that there is a loose disorder.
  • the loose mode only requires that the sequence number carried by the second receiving fault detection message in the two adjacent fault detection messages is greater than the sequence number carried in the first receiving fault detection message, regardless of the second receiving fault detection message.
  • the serial number carried is larger than the serial number carried in the first receiving fault detection message, so that it can be judged whether it is out of order, and thus the defect detected by the loose mode is called loose disordered defect.
  • the sequence of adding the sequence number in the source sending and receiving fault detection message is from large to small, and the sequence number carried by the first receiving fault detection message is greater than the second receiving when the sink end receives the receiving.
  • the serial number carried in the fault detection packet is used to determine whether an out of order occurs.
  • Strictly out-of-order defects are not only to detect whether the message is out of order but also to detect whether the out-of-order disorder is out of order.
  • the embodiment of the present invention further provides a method for determining whether a packet is lost, and determining that packet loss occurs when the difference between the first and second serial numbers is greater than the minimum sequence number interval, where the minimum sequence number interval is
  • the source is the difference between the sequence numbers configured for the two adjacent received fault detection packets. Whether the first sequence number is greater than the second sequence number or the second sequence number is greater than the first sequence number, as long as the difference between the two sequence numbers is greater than the minimum sequence number interval, packet loss occurs. For example, the source is pressed If the sequence number is inserted into the receiving fault detection message, the minimum sequence number interval is 1. If the difference between the first sequence number and the second sequence number is greater than 1, it indicates that packet loss occurs.
  • the packet is not found in the S403 detection, and no packet loss is found in S404, it indicates that the link has neither the out-of-order problem nor the packet loss problem; if it is not detected in S403 If the packet is found to be out of order, and the packet is found in S404, the link is not out of order but there is a problem of packet loss. If the packet is found out in S403, it is not in S404. If the packet loss is found, the link is out of order but the packet is not lost. If the packet is out of order in S403 and the packet is lost in S404, the link exists. In disorder, there is a problem of packet loss, that is, strict disordered defects occur.
  • the sequence of the serial number in the received failure detection packet sent by the source end is a preferred embodiment.
  • the embodiment of the present invention should not be limited to the sequence from large to small.
  • the arrangement of the numbers and the arrangement of other serial numbers can achieve the object of the present invention, and therefore the arrangement methods of the various serial numbers should be covered by the embodiments of the present invention.
  • the defects with higher priority are reported by the alarm information transmission protocol according to the set priority of the disordered and the out-of-order defects. Because the OAM mechanism only reports the highest priority defect at a time, in order to avoid the conflict detection of the defect, the priority is set for the two newly created defect types, for example, the priority of the loose and disordered defect is set to the lowest, which will be strictly chaotic. The priority of the OAM mechanism is set to the lowest.
  • the original defect of the OAM mechanism will be reported because the priority of the loose and disordered defect is the lowest; Strict out-of-order defects and loose disordered defects are detected, and strict out-of-order defects are reported. Such newly added out-of-order defects will not affect the defects of the original 0 AM mechanism. It is also possible to set the strict out-of-order defect priority to the lowest and the loosely-ordered defect priority to the next lowest, which is freely set according to the user's needs. Of course, it is also possible to set a strict out-of-order defect with a higher priority than a loosely-ordered defect, such as loosening out of order. The priority of the defect is set to the lowest, and the strict out-of-order defect is set to the lowest.
  • the packet detection abnormality detection method in the foregoing embodiment implements real-time detection and monitoring of packet disorder and packet loss, and can timely detect packet disorder defects on the link.
  • the defect with the higher priority among the detected out-of-order defects is reported by the method of setting the defect priority, thereby avoiding the conflict of the defect detection.
  • the following three methods are proposed by adding the serial number to the received fault detection message sent by the source.
  • the embodiment of the present invention utilizes the original OAM mechanism fault detection packet carrying sequence.
  • Each CV packet or FFD packet carries a TTSI (Terminal Termination Source Identifier), which is a source LSR (Label Switch Router) identifier and an LSP (Layered Service Provider). Layered service provider) The identifier consists of.
  • TTSI Terminal Termination Source Identifier
  • LSR Label Switch Router
  • LSP Layered Service Provider
  • the embodiment of the present invention provides a method for carrying a sequence number by using a CV packet or an FFD packet on the basis of retaining the original OAM function. On the basis of retaining the original OAM function, the original field of the OAM mechanism fault detection packet is re-divided into a part of the sequence number field to carry the sequence number.
  • the structure of the CV message and the FFD message has the same length and similar structure, except that the frequency part is added to the FFD message. Therefore, only the CV message is taken as an example to describe the method for carrying the serial number of the present invention.
  • the following three methods for generating a receiving fault detection message carrying a sequence number are proposed in the following embodiments.
  • the sequence number can be added to the received fault detection message by using any of the following three methods.
  • the following three methods are preferred implementations of the OAM-based fault detection packet in the embodiment of the present invention.
  • the embodiment of the present invention cannot be used to generate the receiving fault detection report carrying the sequence number only by using the OAM mechanism fault detection packet. Text.
  • a method for generating a fault detection packet carrying a sequence number is as follows: 1.
  • the original field of the OAM mechanism fault detection packet is re-divided into a part of the sequence number field to carry the sequence number.
  • the original field padding part of the 18 octets of the OAM mechanism fault detection is re-divided into a part of the 8 octets to carry the sequence number, so as to carry the original CV packet.
  • the serial number can keep the length of the message unchanged, so it does not increase the burden on the network.
  • the original OAM mechanism fault detection message carries the sequence number, which keeps the message length unchanged, so it does not increase the network load.
  • the method for generating a fault detection packet carrying a sequence number is as follows:
  • the original OAM mechanism fault detection packet is lengthened, and the sequence number field is added to the length of the OAM mechanism fault detection packet to carry the sequence number.
  • the OAM mechanism uses the structure of the extended CV packet to carry the sequence number.
  • the OAM mechanism fault detection packet is lengthened, and the sequence number field is added to the length of the OAM mechanism fault detection packet.
  • Carry the serial number for example, add a sequence number of 10 octets at the end of the original OAM mechanism fault detection message to carry the sequence number, including the sequence number of 8 octes and the check portion of the 2 octets BIP 16 sequence number.
  • the serial number verification part carries the same content as the serial number part, and after receiving the message, the serial number part The check is performed to prevent the serial number portion from being changed during the transmission of the file, thereby preventing the original sequence from being corrupted due to the sequence number portion being changed.
  • the length of the original OAM mechanism fault detection message can be changed without obtaining the sequence number of the original OAM mechanism.
  • the sequence number of the extended OAM mechanism fault detection packet may be partially cut off, and the method for generating the fault detection packet carrying the sequence number is generated. 3.
  • the structure of the fault detection packet carrying the sequence number of the OAM mechanism is newly created. Text. For example, the function type of the received fault detection message is set to 02Hex.
  • the received fault detection packet generated by method 3 is only used for packet out-of-order and packet loss detection. It cannot implement other defect detection of the original OAM mechanism, so it does not. It affects the original text and protocol, and does not increase the length of the message relative to the serial number adding method shown in the second method. Therefore, the bandwidth is not increased relative to the embodiment of the second method.
  • modules in the device in the embodiment can follow The description of the embodiments is distributed in the apparatus of the embodiment, and the corresponding changes may also be made in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.
  • Non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computer device may It is a personal computer, a server, or a network device, etc.
  • Any changes that can be considered by those skilled in the art are not intended to fall within the scope of the present invention.

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

Abstract

La présente invention concerne un procédé pour détecter la réception anormale d'un message, qui passe par les étapes suivantes : - réception du premier et du second message de détection d'échec de réception envoyés par une source, - obtention du premier et du second numéro de séquence du premier et du second message de détection d'échec de réception respectivement, - détermination de la survenue ou non d'une réception anormale d'un message en fonction de la taille du premier et du second numéro de séquence. L'invention concerne aussi un système pour détecter une anomalie de réception d'un message, qui comprend : - au moins une extrémité de source et au moins une extrémité de collecteur, l'extrémité de source servant à envoyer des messages de détection d'échec de réception transportant des numéros de séquence à la suite vers l'extrémité du collecteur, - l'extrémité de collecteur sert à déterminer la survenue ou non d'une réception anormale de message en fonction des numéros de séquence réalisés par le premier et le second message de détection d'échec de réception reçus. Avec l'invention, le désordre des messages peut être détecté et surveillé en temps réel et le défaut est dépassé puisque le désordre ne peut pas être détecté dans l'état actuel de la science.
PCT/CN2008/071071 2007-06-05 2008-05-23 Procédé, système et appareil pour détecter la réception anormale d'un message WO2008148334A1 (fr)

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CN112787984A (zh) * 2019-11-11 2021-05-11 厦门雅迅网络股份有限公司 一种基于相关分析的车载网络异常检测方法及系统

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