WO2013078873A1 - Procédé et dispositif pour identifier un message de réponse - Google Patents

Procédé et dispositif pour identifier un message de réponse Download PDF

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Publication number
WO2013078873A1
WO2013078873A1 PCT/CN2012/079243 CN2012079243W WO2013078873A1 WO 2013078873 A1 WO2013078873 A1 WO 2013078873A1 CN 2012079243 W CN2012079243 W CN 2012079243W WO 2013078873 A1 WO2013078873 A1 WO 2013078873A1
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WO
WIPO (PCT)
Prior art keywords
packet
message
identifier
sent
response
Prior art date
Application number
PCT/CN2012/079243
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English (en)
Chinese (zh)
Inventor
徐耀
张艳梅
Original Assignee
华为技术有限公司
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Filing date
Publication date
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Publication of WO2013078873A1 publication Critical patent/WO2013078873A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and device for identifying a response message.
  • the Ethernet OAM Operaation, Management, and Maintenance
  • the measurement of the frame delay and the frame delay variation is performed by periodically transmitting the DM information to the Maintenance End Point (MEP).
  • MEP Maintenance End Point
  • the frame is received by the peer MEP in the diagnostic interval with the frame with the DM information. After the measurement message is sent, the MEP must be able to identify the response message corresponding to each measurement message from the received message. .
  • the quality of service (QoS) priority may be used to consider that the response message is a response message corresponding to the sent message.
  • the packets sent by the first device to the second device are often passed through at least one intermediate device.
  • the priority of the packet header changes after the intermediate device is changed.
  • the device does not recognize the response packet corresponding to the sent packet.
  • subsequent operations such as delay measurement or statistical packet loss cannot be completed.
  • Embodiments of the present invention provide a method and a device for identifying a response message, to solve the prior art. The problem that the response message could not be identified due to the change in priority.
  • a method for identifying a response message includes: sending, by a first device, a sending message, where a reserved field or an extended field of the sending message carries a first identifier;
  • a method for identifying a response message includes: receiving, by a second device, a sending message sent by the first device, where the reserved field or the extended field of the sending message carries the first Message identifier
  • the first device sends a sending packet, where the sending the first packet identifier includes: the first device generates a sending packet, and obtains the priority of the sent packet as the first packet.
  • the identifier is sent to the reserved field or the extended field of the sent packet, and the sent packet carrying the priority is sent.
  • the first device sends a sending packet, where the sending the packet carries the first packet identifier, where: the first device generates a sending packet, and generates a sequence number for the sending packet as the first The message identifier is sent to the extension field of the sending packet, and the sending packet carrying the sequence number is sent.
  • the first device sends a sending packet, where the sending the first packet identifier includes: the first device generates a sending packet, and the subsequent device is mapped by the intermediate device to the same priority. More than one sent message is divided into a packet group, and a text identifier is determined for each packet group, and the same first identifier is written in all the measurement and texts in a group. Carrying the sent packet of the first packet identifier.
  • the determining the first packet identifier for each packet group includes: generating a sequence number for each packet group as the first packet identifier of the packet group, or, for each packet The priority of one or more packets sent in the group is used as the first packet identifier of the packet group.
  • the first packet identifier is compared with the second packet identifier, and determining, according to the comparison result, whether the response packet is a response packet corresponding to the sent packet includes: If the first packet identifier is the same as the second packet identifier, if the first packet identifier and the second packet identifier are the same, it is confirmed whether the response packet is the same as the sending packet. The response message corresponding to the text.
  • a device for identifying a response message includes: a transceiver module, configured to send a message, where a reserved field or an extension field of the sent message carries a first message identifier Receiving a response message, where the reserved field or the extension field of the response message carries a second message identifier;
  • a device for identifying a response packet includes: a receiving module, configured to: Receiving, by the first device, a sending message, where the reserved field or the extended field of the sending message carries the first message identifier;
  • a generating module configured to generate a response message, and carry the first message identifier in a reserved field or an extended field of the response message
  • a sending module configured to send the response message to the first device.
  • the transceiver module includes: a first identifier unit, configured to acquire a priority of the sent packet as a first packet identifier, and write the priority to a reserved field or extension of the sent packet In the field.
  • a first identifier unit configured to acquire a priority of the sent packet as a first packet identifier, and write the priority to a reserved field or extension of the sent packet In the field.
  • the transceiver module includes: a second identifier unit, configured to generate a sequence number for the sent packet as the first packet identifier, and write the sequence number into an extended field of the sent packet .
  • the transceiver module includes: a third identifier unit, configured to divide two or more sending packets that are subsequently mapped to the same priority by the intermediate device into one packet group, and determine, for each packet group A first four-character identifier, the same first identifier is written in all the measurement texts in a group.
  • a third identifier unit configured to divide two or more sending packets that are subsequently mapped to the same priority by the intermediate device into one packet group, and determine, for each packet group A first four-character identifier, the same first identifier is written in all the measurement texts in a group.
  • the determining module is configured to compare the first packet identifier with the second packet identifier, if the first packet identifier and the second packet are Standard If the acknowledgment is the same, it is confirmed whether the response message is a response message corresponding to the sent message.
  • the response message corresponding to the sent message can be identified by comparing the message identifier.
  • FIG. 1 is a flowchart of a method for identifying a response message according to an embodiment of the present invention
  • FIG. 2a is a schematic diagram of a package format of a packet loss measurement message (LMM);
  • FIG. 2b is a schematic diagram of a package format of a packet loss measurement response (LMR);
  • FIG. 2C is a schematic diagram of a package format of an extended LMM message according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for identifying a response message according to another embodiment of the present invention
  • FIG. 5 is a schematic diagram of an apparatus for identifying a response message according to another embodiment of the present invention.
  • Embodiment 1 provides a method and a device for identifying a response message, which can solve the problem that the response message cannot be identified due to the priority change in the prior art.
  • Embodiments of the present invention also provide corresponding devices. The details are described below separately.
  • Embodiment 1 provides a method and a device for identifying a response message, which can solve the problem that the response message cannot be identified due to the priority change in the prior art.
  • Embodiments of the present invention also provide corresponding devices. The details are described below separately. Embodiment 1
  • an embodiment of the present invention provides a method for identifying a response packet, including: 101.
  • a first device sends a sending packet, where a reserved field or an extended field of the sent packet carries a first packet identifier. .
  • the first device at the source end can carry the packet identifier in the sent packet, and the packet carrying the packet identifier is sent.
  • the original priority of the sent packet generated by the first device may be used as the packet identifier.
  • another sequence number may be generated.
  • the packet identifier may be carried in the reserved field of the sent packet, or may be extended by the protocol, and the extended field is added, and the packet identifier is carried in the extended field of the sent packet.
  • the packet identifier carried in the sent packet is referred to as the first packet identifier.
  • the second device at the receiving end After receiving the sent packet from the first device, the second device at the receiving end extracts the carried packet identifier from the sent packet, generates a response packet, carries the packet identifier in the response packet, and then sends the packet
  • the response message of the message identifier is sent to the first device.
  • the packet identifier carried in the response message is referred to as the second packet identifier.
  • the first device may first extract the second packet identifier carried in the response packet, and then determine the correspondence between the response packet and the sent packet according to the packet identifier. It is.
  • the second packet identifier carried in the response packet can be compared with the first packet identifier carried in the sent packet, if the second packet identifier of a response packet is sent to the first packet of a certain packet. If the identifiers are the same, it can be confirmed that the response message is a response message corresponding to the sent message.
  • the first device can perform subsequent operations according to the following, for example, performing packet loss calculation according to the number of the packet identification statistical response packets; or extracting data carried in the response packet and correspondingly transmitting the packet The data is compared and data such as frame delay is calculated.
  • the embodiment of the present invention provides a method for identifying a response message, which is a technical solution for carrying a message identifier in a sending message and a response message, so that the message can be identified and sent by comparing the message identifier.
  • the response message corresponding to the text.
  • This embodiment is described by taking the Ethernet OAM proposed by the ITU-T Y.1731 standard as an example.
  • the packet loss measurement method recommended by the ITU-T Y.1731 standard is that the source MEP sends a Lost Measurement Message (LMM) to the peer MEP, and receives the packet loss measurement response returned by the peer MEP (Loss Measurement Reply).
  • LMM Lost Measurement Message
  • LMR Packets are counted according to the priority of the packets.
  • the priority of the message after being forwarded by the intermediate device A change has occurred, and the MEP cannot correctly identify the response message. Therefore, the result of the packet loss statistics is inaccurate.
  • the encapsulation format of the Protocol Data Unit (PDU) of the LMM and LMR packets is shown in Figure 2a and 2b, respectively.
  • the "tag” field which usually takes a value of 0, is not currently used and is a reserved field. The length of this field is one byte.
  • the original priority is written to the "tag" field of the message. Specifically, the source MEP may write the original priority in the tag field of the LMM packet when generating the sending packet, such as the LMM packet, and the peer MEP may first extract the LMM packet after receiving the LMM packet.
  • the original priority of the tag field is written, and then the response message, that is, the LMR message, is generated, and the original priority is written in the tag field of the LMR message, and the source MEP receives the LMR message. It can be determined whether the packet identifier carried in the LMR packet is the same as the packet identifier carried in the LMM packet. If the identifier is the same, the LMR packet is a response packet corresponding to the LMM packet. In the above process, the tag field will not be modified, and the MEP can be guaranteed to recognize the response message by identifying the original priority written by the tag field. In this way, there is no need to modify the protocol standard, it is compatible with existing standards, and it is easy to implement.
  • the standard can be improved by writing the 4 ⁇ initial priority defined in the ITU-T Y.1731 standard into the extension field of the message.
  • the four bytes of packets 5-8 can be used as extension fields to carry the packet identifier.
  • the length of the extended field can be determined according to actual needs, and is not limited to four bytes.
  • Embodiment 3 uses the Ethernet OAM proposed by the ITU-T Y.1731 standard as an example to illustrate how to use the original priority as the identifier of the text, and how to carry the identifier in the sent text and the response, and then identify The response message solves the problem that the response message cannot be identified due to the priority change in the prior art.
  • Embodiment 3 uses the Ethernet OAM proposed by the ITU-T Y.1731 standard as an example to illustrate how to use the original priority as the identifier of the text, and how to carry the identifier in the sent text and the response, and then identify The response message solves the problem that the response message cannot be identified due to the priority change in the prior art.
  • Embodiment 3 uses the Ethernet OAM proposed by the ITU-T Y.1731 standard as an example to illustrate how to use the original priority as the identifier of the text, and how to carry the identifier in the sent text and the response, and then identify The response message solves the problem that the response message cannot be identified due to
  • the Ethernet OAM proposed by the ITU-T Y.1731 standard is still described by taking the Ethernet OAM proposed by the ITU-T Y.1731 standard as an example.
  • the reserved number of the message is written to the reserved field of the message, for example in the "Mark"field; however, since the "Mark" field is only one byte in length, the value represented can only be up to 256, and the serial number ⁇ ⁇ may exceed 256, so, alternatively, in another embodiment, the standard may be improved and written into the extension field of the message.
  • the method of extending the packet refer to the foregoing method.
  • the four bytes of the fifth to eighth of the packet may be used as an extension field to carry the packet identifier.
  • the length of the extended field can be determined according to actual needs, and is not limited to four bytes.
  • the first device For the same statistic or measurement object, the first device generates the same sequence number, and the response message of the sent message will also carry the same sequence number.
  • the first device can identify the response message according to the sequence number. Correspondence between the text and the sent message.
  • Embodiment 4 is based on the Ethernet OAM proposed by the ITU-T Y.1731 standard. It shows how to use the sequence number as the packet identifier. How to carry the packet identifier in the sending packet and the response packet, and then identify The response message solves the problem that the response message cannot be identified due to the priority change in the prior art.
  • Embodiment 4 is based on the Ethernet OAM proposed by the ITU-T Y.1731 standard. It shows how to use the sequence number as the packet identifier. How to carry the packet identifier in the sending packet and the response packet, and then identify The response message solves the problem that the response message cannot be identified due to the priority change in the prior art.
  • Embodiment 4 is based on the Ethernet OAM proposed by the ITU-T Y.1731 standard. It shows how to use the sequence number as the packet identifier. How to carry the packet identifier in the sending packet and the response packet, and then identify The response message solves the problem that the response message cannot be identified due to
  • a sequence number can be generated for each packet group as the packet identifier of the packet group, and the serial number is written in each of the sent packets in the packet group. Refer to Example 3 for how to generate and write a serial number.
  • the priority of one of the packet groups, or the combination of the priorities of the multiple packets may be used as the packet identifier of the packet.
  • the packet identifier of the packet For the manner of generating and writing the identifier of the packet, refer to Embodiment 2.
  • the combination of the sequence number and the priority of the sent message may also be used as the identifier of the message group. For example, a sequence number may be generated for each group, and the combination of the sequence number and the priority of all the packets sent by the group is used as the message identifier of the packet.
  • the above embodiment uses the Ethernet OAM proposed by the ITU-T Y.1731 standard as an example to describe how to divide a packet group, determine the packet identifier according to the packet group, and then identify the response packet, which solves the prior art.
  • the above embodiments 2 to 4 are described by taking the Ethernet OAM proposed by the ITU-T Y.1731 standard as an example, and solving the problem that the response message cannot be identified due to the change of the priority, but it should be noted that the present invention
  • the technical solution disclosed in the embodiment is applicable to an application scenario in which all the Ethernet OAMs need to identify and determine the correspondence between the sent message and the response message, and is not limited to solving the scenario in which the message is identified by using the priority as the key.
  • an embodiment of the present invention provides a method for identifying a response message, including:
  • the second device receives the sending packet sent by the first device, where the reserved field or the extended field of the sending packet carries the first packet identifier.
  • the first device at the source end can carry the packet identifier in the sent packet, and the packet carrying the packet identifier is sent.
  • the packet identifier carried in the sent packet is referred to as the first packet identifier.
  • the second device at the receiving end After receiving the sent packet from the first device, the second device at the receiving end extracts the carried packet identifier from the sent packet, generates a response packet, carries the extracted packet identifier in the response packet, and then sends the packet
  • the response message carrying the message identifier is sent to the first device.
  • the packet identifier carried in the response packet is referred to as a second packet identifier.
  • the first device may determine the correspondence between the response message and the sent message according to the message identifier. If the second packet identifier of a response packet is the same as the first packet identifier of a certain packet, the response packet can be confirmed.
  • the text is a response message corresponding to the sent message.
  • the embodiment of the present invention provides a method for identifying a response message, which is a technical solution for carrying a message identifier in a sending message and a response message, so that the message can be identified and sent by comparing the message identifier.
  • the response message corresponding to the text.
  • an embodiment of the present invention provides a device for identifying a response packet, including: a transceiver module 401, configured to send a packet, where a reserved field or an extension field of the packet carries a first packet Receiving a response message, where the reserved field or the extension field of the response message carries a second message identifier;
  • the determining module 402 is configured to compare the first message identifier and the second packet identifier.
  • the transceiver module may include:
  • a first identifier unit configured to acquire a priority of the sent packet as a first packet identifier, and write the priority into a reserved field or an extended field of the sent packet;
  • a second identifier unit configured to generate a sequence number for the sent packet as a first packet identifier, and write the sequence number into an extended field of the sent packet
  • a third identifier unit configured to divide two or more transmission packets that are subsequently mapped to the same priority by the intermediate device into one packet group, and determine a first packet identifier for each packet group, in a report The same first message identifier is written in all measurement messages in the group.
  • the determining module 402 is specifically configured to compare the first packet identifier with the second packet identifier, and if the first packet identifier and the second packet identifier are the same, Whether the response message is a response message corresponding to the sent message.
  • the embodiment of the present invention provides a device for identifying a response packet, where the device can carry a packet identifier in the sent packet, and extract the packet identifier carried in the response packet, and identify and match the packet identifier by comparing the packet identifier.
  • the response packet corresponding to the packet is sent, which solves the problem that the response packet cannot be identified due to the priority change in the prior art.
  • an embodiment of the present invention provides an apparatus for identifying a response message, including: a receiving module 501, configured to receive a sending message sent by a first device, where the sending field is carried in a reserved field or an extended field. Have the first message identifier;
  • the generating module 502 is configured to generate a response message, where the first message identifier is carried in a reserved field or an extended field of the response message;
  • the sending module 503 is configured to send the response message to the first device.
  • the embodiment of the present invention provides a device for identifying a response packet, where the device can extract the packet identifier carried in the sent packet from the sending device, and carry the packet identifier in the response packet and return it to the response packet.
  • the sender device is configured to identify the response packet corresponding to the sent packet by comparing the packet identifier, which solves the problem that the response packet cannot be identified due to the priority change in the prior art.
  • the program can be stored in a computer readable storage medium.
  • the storage medium can include: Read-only memory, read-only memory, disk or disc, and more.

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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 se rapporte à un procédé adapté pour identifier un message de réponse. Le procédé selon l'invention comprend les étapes suivantes : un premier dispositif transmet un message de transmission, un champ réservé ou un champ étendu du message de transmission contenant un premier identifiant de message ; le premier dispositif reçoit un message de réponse, un champ réservé ou un champ étendu du message de réponse contenant un second identifiant de message ; le premier dispositif compare le premier message identification au second identifiant de message ; et il détermine, sur la base du résultat d'une comparaison, si le message de réponse est un message de réponse qui correspond au message de transmission, ou non. Dans ses modes de réalisation, la présente invention se rapporte d'autre part à un dispositif correspondant. Dans les solutions techniques décrites dans le mode de réalisation de la présente invention, les identifiants de messages sont contenus dans le message de transmission et le message de réponse. De cette manière, le message de réponse correspondant au message de transmission peut être identifié en comparant les identifiants de messages. La présente invention permet ainsi de résoudre le problème lié, dans l'état de la technique, au fait que les messages de réponse ne peuvent pas être identifiés en raison du changement du niveau de priorité.
PCT/CN2012/079243 2011-11-29 2012-07-27 Procédé et dispositif pour identifier un message de réponse WO2013078873A1 (fr)

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CN201110387521.3A CN102404152B (zh) 2011-11-29 2011-11-29 识别应答报文的方法及设备
CN201110387521.3 2011-11-29

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CN102404152B (zh) * 2011-11-29 2014-06-04 华为技术有限公司 识别应答报文的方法及设备
CN106027329A (zh) * 2016-05-16 2016-10-12 乐视控股（北京）有限公司 推送服务测试方法及装置
CN108156050A (zh) * 2017-11-28 2018-06-12 盛科网络（苏州）有限公司 无缝双向转发检测方法及装置
CN112565295A (zh) * 2020-12-24 2021-03-26 中国电子科技集团公司第二十研究所 一种基于顺序编码的指令应答优化方法

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