WO2018077110A1 - Procédé d'envoi de paquets et de réception de paquets, dispositif de réseau, et système d'envoi de paquets - Google Patents

Procédé d'envoi de paquets et de réception de paquets, dispositif de réseau, et système d'envoi de paquets Download PDF

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Publication number
WO2018077110A1
WO2018077110A1 PCT/CN2017/106907 CN2017106907W WO2018077110A1 WO 2018077110 A1 WO2018077110 A1 WO 2018077110A1 CN 2017106907 W CN2017106907 W CN 2017106907W WO 2018077110 A1 WO2018077110 A1 WO 2018077110A1
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Prior art keywords
network device
error
link
tdm
service signal
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PCT/CN2017/106907
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English (en)
Chinese (zh)
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刘军
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华为技术有限公司
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Publication of WO2018077110A1 publication Critical patent/WO2018077110A1/fr

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    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • H04L1/0008—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length by supplementing frame payload, e.g. with padding bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/24—Time-division multiplex systems in which the allocation is indicated by an address the different channels being transmitted sequentially
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/24—Time-division multiplex systems in which the allocation is indicated by an address the different channels being transmitted sequentially
    • H04J3/242—Time-division multiplex systems in which the allocation is indicated by an address the different channels being transmitted sequentially the frames being of variable length
    • 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
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/003—Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/12—Shortest path evaluation
    • H04L45/123—Evaluation of link metrics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/68—Pseudowire emulation, e.g. IETF WG PWE3

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method for transmitting a message and receiving a message, a network device, and a message sending system.
  • the circuit emulation service (CES) technology solves the problem of transparent transmission of time division multiplexing (TDM) service signals on a packet switch network (PSN).
  • CES provides simulation of TDM service signals traversing a PSN, enabling PSN operators to provide services to users with only TDM equipment.
  • the basic principle of the CES is to encapsulate the payload data of the TDM service signal into a CES message at the PSN portal, decapsulate the CES message at the PSN exit, regenerate the TDM service signal, and complete the transparent transmission.
  • the network device can select according to the error state of the link.
  • the signal may be selected in the order of priority of a signal normal link, a signal degraded (SD) link, and an Excessive Error (EXC) link.
  • SD signal degraded
  • EXC Excessive Error
  • the embodiment of the present application provides a method for transmitting a message and receiving a message, a network device, and a message sending system, which are helpful for transmitting a bit error state in a circuit emulation service.
  • a method for transmitting a message is provided, which is applied to a first network device.
  • the first network device and the second network device are located in the same packet switched network PSN.
  • the method includes:
  • the first network device receives a TDM service signal from a third network device located in the time division multiplexed TDM network via the first link.
  • the first network device obtains the error status of the first link and the payload data of the TDM service signal according to the TDM service signal, and generates a circuit emulation service CES message.
  • the CES message includes an error identifier and the payload data.
  • the error identifier is used to indicate a bit error status of the first link.
  • the first network device sends the CES message to the second network device.
  • the first network device adds an error identifier to the CES packet, and is used to indicate the error status of the first link.
  • the network device in the PSN can monitor the error status of the link in the TDM network, and can transmit the error status in the PSN.
  • the network device in the TDM network that receives the TDM service signal at the PSN exit can thus know the link error status in order to select the link.
  • the CESOPSN control word or the SATOP control word of the CES message includes the error identifier.
  • the CESOPSN control word or the SATOP control word to pass the error status, transparent transmission is achieved quickly and easily without additional overhead.
  • a method for receiving a message is provided, which is applied to a second network device.
  • the second network device and the first network device are located in the same packet switching network PSN.
  • the method includes:
  • the second network device receives a circuit emulation service CES message from the first network device.
  • the CES message includes payload data and a first error identifier of the first time division multiplexed TDM service signal.
  • the first error identifier is used to indicate a bit error status of the first link.
  • the first link is used by the first network device to receive the first TDM service signal from a third network device located in a first time division multiplexed TDM network.
  • the second network device Determining, by the second network device, the error status of the first link according to the first error identifier, and generating a second TDM service signal according to the error status of the first link and the payload data .
  • the second TDM service signal includes a second error identifier and the payload data.
  • the second error identifier is used to indicate an error status of the first link.
  • the second network device sends the second TDM service signal to a fourth network device located in the second TDM network.
  • the second network device identifies the first error identifier in the CES packet, adds the second error identifier to the TDM service signal, and indicates the link error status to the fourth network device in the second TDM network. .
  • the network device in the TDM network of the PSN outlet can select the link according to the error state of the link indicated by the second error identifier.
  • the CESOPSN control word or the SATOP control word of the CES message carries the first error identifier.
  • transparent transmission is achieved quickly and easily without additional overhead.
  • a first network device is provided.
  • the first network device and the second network device are located in the same packet switched network PSN.
  • the first network device includes a receiving unit, a processing unit, and a sending unit.
  • the receiving unit is configured to receive a TDM service signal from a third network device located in the time division multiplexing TDM network via the first link.
  • the processing unit is configured to obtain, according to the TDM service signal, an error state of the first link and payload data of the TDM service signal, and generate a circuit emulation service CES message.
  • the CES message includes an error identifier and the payload data.
  • the error identifier is used to indicate a bit error status of the first link.
  • the sending unit is configured to send the CES message to the second network device.
  • the CESOPSN control word or the SATOP control word of the CES message includes the error identifier.
  • the above aspect of the third aspect has the same technical effect as the solution of the first aspect.
  • a second network device is provided.
  • the second network device and the first network device are located in the same packet switching network PSN.
  • the second network device includes a receiving unit, a processing unit, and a sending unit.
  • the receiving unit is configured to receive a circuit emulation service CES message from the first network device.
  • Said The CES message includes payload data and a first error identifier of the first time division multiplexed TDM service signal.
  • the first error identifier is used to indicate a bit error status of the first link.
  • the first link is used by the first network device to receive the first TDM service signal from a third network device located in a first time division multiplexed TDM network.
  • the processing unit is configured to determine an error status of the first link according to the first error identifier, and generate a second TDM service according to the error status of the first link and the payload data. signal.
  • the second TDM service signal includes a second error identifier and the payload data.
  • the error identifier is used to indicate a bit error status of the first link.
  • the sending unit is configured to send the second TDM service signal to a fourth network device located in the second TDM network.
  • the CESOPSN control word or the SATOP control word of the CES message includes the first error identifier.
  • the above aspect of the fourth aspect has the same technical effect as the solution of the second aspect.
  • a message sending system including a first network device and a second network device.
  • the first network device and the second network device are located in the same packet switching network PSN.
  • the first network device receives a TDM service signal from a third network device located in the first time division multiplexing TDM network via the first link, and obtains the error of the first link according to the TDM service signal.
  • the state and the payload data of the TDM service signal generate a circuit emulation service CES message, and send the CES message to the second network device.
  • the CES message includes a first error identifier and the payload data, where the first error identifier is used to indicate an error status of the first link.
  • the second network device receives the CES packet from the first network device, and determines an error status of the first link according to the first error identifier, according to the first link.
  • the error state and the payload data generate a second TDM service signal, and send the second TDM service signal to a fourth network device located in the second TDM network, where the second TDM service signal includes a second error code
  • the second error identifier is used to indicate a bit error status of the first link.
  • the network device in the PSN transmits the error status through the CES message, and notifies the error status to the network device in the TDM network located at the PSN exit. Thereby the network device in the TDM network can select the link according to the error status.
  • the CES message carries the error identifier by using a CESOPSN control word or a SATOP control word.
  • a CESOPSN control word or a SATOP control word By using the CESOPSN control word or the SATOP control word to pass the error status, transparent transmission is achieved quickly and easily without additional overhead.
  • a first network device is provided.
  • the first network device and the second network device are located in the same packet switched network PSN.
  • the first network device includes a receiving interface, a processor, and a sending interface.
  • the receiving interface is configured to receive a TDM service signal from a third network device located in a time division multiplexed TDM network via a first link.
  • the processor is configured to obtain, according to the TDM service signal, an error state of the first link and payload data of the TDM service signal, and generate a circuit emulation service CES message.
  • the CES message includes an error identifier and the payload data.
  • the error identifier is used to indicate a bit error status of the first link.
  • the sending interface is configured to send the CES message to the second network device.
  • the CESOPSN control word or the SATOP control word of the CES message includes the error identifier.
  • the above aspect of the sixth aspect has the same technical effect as the aspect of the first aspect.
  • a second network device is provided.
  • the second network device and the first network device are located in the same packet switching network PSN.
  • the second network device includes a receiving interface, a processor, and a sending interface.
  • the receiving interface is configured to receive a circuit emulation service CES message from the first network device.
  • the CES message includes payload data and a first error identifier of the first time division multiplexed TDM service signal.
  • the first error identifier is used to indicate a bit error status of the first link.
  • the first link is used by the first network device to receive the first TDM service signal from a third network device located in a first time division multiplexed TDM network.
  • the processor is configured to determine an error status of the first link according to the first error identifier, and generate a second TDM service according to the error status of the first link and the payload data. signal.
  • the second TDM service signal includes a second error identifier and the payload data.
  • the second error identifier is used to indicate an error status of the first link.
  • the sending interface is configured to send the second TDM service signal to a fourth network device located in the second TDM network.
  • the CESOPSN control word or the SATOP control word of the CES message includes the error identifier.
  • the above aspect of the seventh aspect has the same technical effect as the solution of the second aspect.
  • FIG. 1 is a schematic diagram of a possible application scenario provided by an embodiment of the present application
  • FIG. 2 is a corresponding relationship diagram of an error code identifier, a bit error rate level, and an error status according to an embodiment of the present application;
  • FIG. 3 is a corresponding relationship diagram of an error code identifier, a bit error rate level, and a bit error state according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart of a method for processing a message according to an embodiment of the present disclosure
  • FIG. 5 is a structural diagram of a first network device according to an embodiment of the present application.
  • FIG. 6 is a structural diagram of a second network device according to an embodiment of the present application.
  • FIG. 7 is a structural diagram of a first network device according to an embodiment of the present application.
  • FIG. 8 is a structural diagram of a second network device according to an embodiment of the present application.
  • FIG. 9 is a structural diagram of a message sending system according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of a possible application scenario provided by an embodiment of the present application.
  • the packet switching network PSN includes a first network device and a second network device.
  • the first network device is an edge network device of the PSN, and communicates with a third network device outside the PSN.
  • the second network device is an edge network device of the PSN, and communicates with a fourth network device outside the PSN.
  • the third network device is located in a first TDM network
  • the fourth network device is located in a second TDM network.
  • the first TDM network and the second TDM network may It is a different TDM network, or it can be the same TDM network.
  • the third network device and the fourth network device may transmit and receive signals in a frame format of, for example, a Level 1 Synchronous Transfer Module (STM-1).
  • the first network device receives the TDM service signal from the third network device, and encapsulates the payload data in the TDM service signal to form a circuit emulation service CES message.
  • the payload data is, for example, the value of the payload payload field in the STM-1 frame format.
  • the first network device sends the CES message to the second network device.
  • the second network device receives the CES packet, decapsulates the CES packet, obtains the payload data, adds an overhead byte, and regenerates a TDM service signal.
  • the second network device sends the regenerated TDM service signal to the fourth network device.
  • the PSN may further include a fifth network device and a sixth network device.
  • the fifth network device and the sixth network device are both edge network devices of the PSN.
  • the fifth network device performs an operation similar to the first network device.
  • the sixth network device performs an operation similar to the second network device.
  • the TDM service signal sent by the third network device is regenerated in the sixth network device and sent to the fourth network device.
  • the fourth network device can simultaneously receive TDM service signals having the same payload data from the second network device and the sixth network device.
  • the fourth network device may select one of the signals as the primary signal and the other as the standby signal.
  • the status, and the error status of the second link between the third network device and the fifth network device are not delivered to the fourth network device. Therefore, the fourth network device cannot perform the active/standby signal selection according to the error states of the first link and the second link.
  • the CES message uses the pseudo-wire emulation edge to edge (PWE3) control word to implement the operation management and maintenance (OAM) function.
  • PWE3 control word uses the PWE3 control word to transmit the error status.
  • the PWE3 control word is further subdivided into a structure-aware TDM circuit emulation service over PSN (CESOPSN) control word and a structure-agnostic TDM over packet (SATOP) control word.
  • the PWE3 control word is a CESOPSN control word in structured CES message transmission.
  • the PWE3 control word is the SATOP control word in the unstructured CES message transmission.
  • the Internet Engineering Task Force (IETF) RFC 5086 (Structure-Aware Time Division Multiplexed Circuit Emulation Service over Packet Switched Network) Section 4.3 describes the format of the CESOPSN control word in detail.
  • the embodiment of the present application uses the L field (1 bit) and the M field (2 bit) in the CESOPSN control word, and has a total length of 3 bits.
  • the 3-bit combination may include eight identifiers of 000, 001, 010, 011, 100, 101, 110, and 111. In the definition of RFC5086, 000, 010, and 100 have been used, and the remaining five identifiers of 001, 011, 101, 110, and 111 are reserved for expansion.
  • 001 and 011 may be selected as the error identifier to indicate the error status.
  • the correspondence shown in FIG. 2 can be established.
  • the L field (1 bit) and the M field (2 bit) in the CESOPSN control word constitute a 3-bit value.
  • the value 001 corresponds to the error rate exceeding the threshold of 10-3, 10-4 or 10-5
  • the value 011 corresponds to the level of the error rate exceeding the threshold of 10-6, 10-7, 10-8 or 10-9.
  • the correspondence shown in Figure 2 is only an example. Which of the above five identifiers are selected, which are labeled and The correspondence between the error rate threshold levels and the correspondence between the identifiers and the respective error states can be arbitrarily adjusted.
  • the format of the SATOP control word is described in detail in section 4.3.1 of IETF RFC 4553 (Structure-Agnostic Time Division Multiplexing over Packet).
  • the embodiment of the present application uses the RSV field (2 bits) in the SATOP control word, and has a total length of 2 bits.
  • the 2-bit combination may include 4 identifiers of 00, 01, 10, and 11. 01, 10, and 11 in the definition of RFC4533 can be used for extension.
  • 01 and 10 may be selected as the error identifier to indicate the error status.
  • the correspondence shown in FIG. 3 can be established.
  • the RSV field (2 bits) in the SATOP control word constitutes a 2-bit value.
  • the value 01 corresponds to the bit error rate exceeding the threshold of 10-3, 10-4 or 10-5
  • the value 10 corresponds to the level of the error rate exceeding the threshold of 10-6, 10-7, 10-8 or 10-9.
  • the corresponding relationship shown in FIG. 3 is only an example. The correspondence between the three identifiers, the correspondence between the identifier and each error rate threshold level, and the correspondence between the identifier and each error state can be arbitrarily adjusted.
  • FIG. 4 is a flowchart of a method for processing a message according to an embodiment of the present disclosure.
  • the method shown in Figure 4 can be used in the scenario shown in Figure 1.
  • a method for processing a message according to an embodiment of the present application is described below with reference to FIG. 1 to FIG.
  • the first network device receives the first TDM service signal from the third network device located in the first time division multiplexing TDM network via the first link.
  • the frame format used by the first TDM service signal may be, for example, STM-1 or the like.
  • the first network device obtains, according to the first TDM service signal, an error state of the first link and payload data of the first TDM service signal, and generates a circuit emulation service CES message.
  • the second network device sends the CES message.
  • the CES message includes a first error identifier and the payload data.
  • the first error identifier is used to indicate an error status of the first link.
  • the first network device detects a bit error rate on the first link, and may be aware of an error status of the first link and a corresponding first error identifier. For example, when the CESOPSN control word is used, according to the correspondence relationship of FIG. 2, the bit error rate is 10-6, the corresponding error status is SD, the corresponding first error code is 011, and the bit error rate is 10-5. The corresponding error status is EXC, and the corresponding first error code is 001. For example, when the SATOP control word is used, according to the correspondence relationship of FIG. 3, the bit error rate is 10-6, the corresponding error state is SD, the corresponding first error code is 10, and the bit error rate is 10-5. The corresponding error status is EXC, and the corresponding first error code is 10.
  • the first network device obtains payload data from the first TDM service signal.
  • the payload data that is, the remaining data after the overhead byte is removed from the first TDM service signal, for example, the value of the payload payload field in the STM-1 frame format.
  • the first network device generates a CES message including the first error identifier and the payload data.
  • the first error identifier may be placed in a CESOPSN control word of the CES message, such as an L field and an M field.
  • the first error identifier may also be placed in a SATOP control word of the CES message, such as an RSV field.
  • By transmitting the CES message to other network devices in the PSN other network devices in the PSN can also detect the error status of the link in the TDM network.
  • the first network device sends the CES message to the second network device.
  • the first network device and the second network device are located in the same packet switching network PSN, and both are edge network devices of the PSN.
  • the second network device receives the CES packet from the first network device, and generates a second TDM service signal, where the second TDM service signal includes a second error identifier and the payload data.
  • the second The error identifier is used to indicate the error status of the first link.
  • the second network device After receiving the CES message, the second network device obtains payload data of the first TDM service signal from the CES message. The second network device further determines, according to the first error identifier in the CES packet, an error status of the first link, such as an EXC or an SD. The second network device generates a second TDM service signal according to the error status of the first link and the payload data.
  • the generating process may be, for example, the second network device adding an overhead byte for transmitting a TDM service signal on the basis of the payload data, and adding a second error identifier in the overhead byte.
  • the error status of the first link is indicated by the second error identifier.
  • the overhead byte is, for example, the segment overhead and channel overhead in the STM-1 frame format.
  • the second error identifier may be, for example, a bit value used by the Huawei OSN 1500, the OSN 3500, and the OSN 7500 device to transmit a B1_EXC, B2_EXC, B3_EXC, B1_SD, B2_SD, or B3_SD alert signal in the STM-1 frame.
  • B1_EXC or B2_EXC indicates that the regenerator section B1 or the multiplex section B2 in the STM-1 frame reaches the EXC state
  • B1_SD or B2_SD indicates that the regenerator section B1 or the multiplex section B2 in the STM-1 frame reaches the SD state
  • B3_EXC or B3_SD indicates the STM-1.
  • the higher order channel B3 in the frame reaches the EXC or SD state.
  • the second network device sends the second TDM service signal to a fourth network device that is located in the second TDM network.
  • the fourth network device may know the error status of the first link according to the second error identifier in the second TDM service signal. Further, when the fourth network device further receives the third TDM service signal that is sent by the sixth network device and includes the second error identifier, the fourth network device may include the second error according to the TDM service signal. The logo is selected. For example, the second error identifier of the TDM service signal received from the second network device indicates that the error status is SD, and the second error identifier of the TDM service signal received from the sixth network device indicates that the error status is EXC. The fourth network device may select the TDM service signal received from the second network device as the primary signal, and use the TDM service signal received from the sixth network device as the standby signal.
  • the transmission of the error state is maintained.
  • the fourth network device can select a signal of a link with better communication quality.
  • the above error state is transmitted in the CES message, and the original PWE3 control word is used, and the transparent transmission is realized simply and quickly without adding extra overhead.
  • FIG. 5 is a schematic structural diagram of a first network device 500 according to an embodiment of the present application.
  • the first network device 500 can be used to perform step 401 and step 402 in FIG.
  • the first network device 500 and the second network device are located in the same packet switched network PSN.
  • the first network device 500 includes a receiving unit 501, a processing unit 502, and a transmitting unit 503.
  • the receiving unit 501 is configured to receive, by using the first link, a TDM service signal from a third network device located in the time division multiplexing TDM network.
  • the processing unit 502 is configured to obtain, according to the TDM service signal, the error status of the first link and the payload data of the TDM service signal, and generate a circuit emulation service CES message.
  • the CES message includes a first error identifier and the payload data.
  • the first error identifier is used to indicate an error status of the first link.
  • the sending unit 503 is configured to send the CES message to the second network device.
  • the CESOPSN control word or the SATOP control word of the CES message includes the first error identifier.
  • FIG. 6 is a schematic structural diagram of a second network device 600 according to an embodiment of the present application.
  • the second network device 600 can be used to perform step 403 and step 404 in FIG. Second network device 600 and first network device Located in the same packet switching network PSN.
  • the second network device 600 includes a receiving unit 601, a processing unit 602, and a transmitting unit 603.
  • the receiving unit 601 is configured to receive a circuit emulation service CES message from the first network device.
  • the CES message includes payload data and a first error identifier of the first time division multiplexed TDM service signal.
  • the first error identifier is used to indicate a bit error status of the first link.
  • the first link is used by the first network device to receive the first TDM service signal from a third network device located in a first time division multiplexed TDM network.
  • the processing unit 602 is configured to determine, according to the first error identifier, an error status of the first link, and generate a second TDM service signal according to the error status of the first link and the payload data.
  • the second TDM service signal includes a second error identifier and the payload data.
  • the second error identifier is used to indicate an error status of the first link.
  • the sending unit 603 is configured to send the second TDM service signal to a fourth network device located in the second TDM network.
  • the CESOPSN control word or the SATOP control word of the CES message includes the first error identifier.
  • FIG. 7 is a schematic structural diagram of a first network device 700 according to an embodiment of the present application.
  • the first network device 700 can be used to perform step 401 and step 402 in FIG.
  • the first network device 700 is located in the same packet switched network PSN as the second network device.
  • the first network device 700 includes a receiving interface 701, a processor 702, and a transmitting interface 703.
  • the receiving interface 701 is configured to receive, by using the first link, a TDM service signal from a third network device located in the time division multiplexed TDM network.
  • the processor 702 is configured to obtain, according to the TDM service signal, the error status of the first link and the payload data of the TDM service signal, and generate a circuit emulation service CES message.
  • the CES message includes a first error identifier and the payload data.
  • the first error identifier is used to indicate an error status of the first link.
  • the sending interface 703 is configured to send the CES message to the second network device.
  • the CESOPSN control word or the SATOP control word of the CES message includes the first error identifier.
  • the first network device 700 can be a packet transport network (PTN) device.
  • PTN packet transport network
  • the receiving interface 701 can be an SDH interface.
  • the SDH interface is an optical interface, an electrical interface, or a combination thereof.
  • the processor 702 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • CPU central processing unit
  • NP network processor
  • the transmit interface 703 can be an Ethernet interface.
  • the Ethernet interface is an optical interface, an electrical interface, or a combination thereof.
  • the first network device 700 can be used to implement the functions of the first network device 500.
  • the receiving interface 701 can be used to implement the receiving unit 501
  • the processor 702 can be used to implement the processing unit 502
  • the sending interface 703 can be used to implement the sending unit 503.
  • FIG. 8 is a schematic structural diagram of a second network device 800 according to an embodiment of the present application.
  • the second network device 800 can be used to perform steps 403 and 404 of FIG.
  • the second network device 800 and the first network device are located in the same packet switched network PSN.
  • the second network device 800 includes a receiving interface 801, a processor 802, and a transmitting interface 803.
  • the receiving interface 801 is configured to receive a circuit emulation service CES message from the first network device.
  • the CES message includes payload data and a first error identifier of the first time division multiplexed TDM service signal.
  • the first error is used to indicate the error status of the first link.
  • the first link is used by the first network device to receive the first TDM service signal from a third network device located in a first time division multiplexed TDM network.
  • the processor 802 is configured to determine, according to the first error identifier, an error status of the first link, and generate a second TDM service signal according to the error status of the first link and the payload data.
  • the second TDM service signal includes a second error identifier and the payload data.
  • the second error identifier is used to indicate an error status of the first link.
  • the sending interface 801 is configured to send the second TDM service signal to a fourth network device located in the second TDM network.
  • the CESOPSN control word or the SATOP control word of the CES message includes the first error identifier.
  • the second network device 800 can be a packet transport network (PTN) device.
  • PTN packet transport network
  • the receiving interface 801 can be an Ethernet interface.
  • the Ethernet interface is an optical interface, an electrical interface, or a combination thereof.
  • the processor 802 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • CPU central processing unit
  • NP network processor
  • the transmit interface 803 can be an SDH interface.
  • the SDH interface is an optical interface, an electrical interface, or a combination thereof.
  • the second network device 800 can be used to implement the functions of the second network device 600.
  • the receiving interface 801 can be used to implement the receiving unit 601
  • the processor 802 can be used to implement the processing unit 602
  • the sending interface 803 can be used to implement the sending unit 603.
  • FIG. 9 is a schematic structural diagram of a message sending system according to an embodiment of the present disclosure.
  • the message sending system includes a first network device and a second network device.
  • the first network device and the second network device are located in the same packet switching network PSN.
  • the first network device and the second network device may be the first network device 500 and the second network device 600 in FIG. 5 and FIG. 6, respectively.
  • the first network device and the second network device may also be the first network device 700 and the second network device 800 in FIG. 7 and FIG. 8, respectively.
  • the error state of the road and the payload data of the first TDM service signal generate a circuit emulation service CES message, and send the CES message to the second network device.
  • the CES message includes a first error identifier and the payload data, where the first error identifier is used to indicate an error status of the first link.
  • the second network device receives the CES packet from the first network device, and determines an error status of the first link according to the first error identifier, according to the first link.
  • the error state and the payload data generate a second TDM service signal, and send the second TDM service signal to a fourth network device located in the second TDM network, where the second TDM service signal includes a second error code
  • the second error identifier is used to indicate a bit error status of the first link.
  • the network device in the PSN transmits the error status through the CES message, and notifies the error status to the network device in the TDM network located at the PSN exit. Thereby the network device in the TDM network can select the link according to the error status.
  • the CES message carries the first error identifier by using a CESOPSN control word or a SATOP control word.
  • the program is executed by the processor, and the program may be stored in a computer readable storage medium, which is a non-transitory medium such as a random access memory, a read only memory, a flash memory, Hard disk, solid state disk, magnetic tape, floppy disk, optical disc, and any combination thereof.
  • a computer readable storage medium which is a non-transitory medium such as a random access memory, a read only memory, a flash memory, Hard disk, solid state disk, magnetic tape, floppy disk, optical disc, and any combination thereof.

Abstract

La présente invention concerne un procédé d'envoi de paquets et de réception de paquets, un dispositif de réseau, et un système d'envoi de paquets. Dans le procédé d'envoi d'un paquet et de réception d'un paquet, un premier dispositif de réseau reçoit, via une liaison, un premier signal de service de multiplexage à répartition dans le temps (TDM), d'un troisième dispositif de réseau situé dans un réseau TDM; d'après ledit signal de service TDM, l'état de code d'erreur de ladite première liaison et les données de charge utile du signal de service TDM sont obtenus, un paquet de service d'émulation de circuit (CES) est généré, et ledit paquet CES est envoyé au deuxième dispositif de réseau; le deuxième dispositif de réseau reçoit le paquet CES et génère un second signal de service TDM contenant un second identificateur de code d'erreur et les données de charge utile, ledit second identificateur de code d'erreur servant à indiquer l'état de code d'erreur de la première liaison et envoyer le second signal de service TDM à un quatrième dispositif de réseau situé dans un second réseau TDM. La solution technique fournie par la présente invention permet à un dispositif de réseau à commutation de paquets de transmettre de manière transparente un état de code d'erreur de liaison dans un réseau TDM.
PCT/CN2017/106907 2016-10-25 2017-10-19 Procédé d'envoi de paquets et de réception de paquets, dispositif de réseau, et système d'envoi de paquets WO2018077110A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101217452A (zh) * 2007-01-05 2008-07-09 华为技术有限公司 一种通过分组交换网传输tdm业务的方法、装置和系统
CN101415276A (zh) * 2008-11-24 2009-04-22 中兴通讯股份有限公司 一种发送和接收数据的方法及其设备
CN101714951A (zh) * 2009-12-03 2010-05-26 华为技术有限公司 Ces中业务数据的发送、接收方法及设备
CN103684708A (zh) * 2012-09-03 2014-03-26 中兴通讯股份有限公司 Ces数据发送方法、装置及ces数据接收方法、装置
US20160066198A1 (en) * 2013-05-03 2016-03-03 Interdigital Patent Holdings, Inc. Methods for wifi sectorization mac enhancement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101686185B (zh) * 2008-09-23 2011-12-07 华为技术有限公司 一种在分组网络中传送tdm业务的方法、装置及系统
US8335235B2 (en) * 2009-03-20 2012-12-18 Broadcom Corporation Methods and apparatus for extending MAC control message in EPON
CN102388582B (zh) * 2011-08-29 2014-05-07 华为技术有限公司 附加空闲位的传输方法、发送机和网络系统
CN105933087B (zh) * 2016-04-18 2018-07-31 华为技术有限公司 一种以太网中数据处理的方法、相关设备及系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101217452A (zh) * 2007-01-05 2008-07-09 华为技术有限公司 一种通过分组交换网传输tdm业务的方法、装置和系统
CN101415276A (zh) * 2008-11-24 2009-04-22 中兴通讯股份有限公司 一种发送和接收数据的方法及其设备
CN101714951A (zh) * 2009-12-03 2010-05-26 华为技术有限公司 Ces中业务数据的发送、接收方法及设备
CN103684708A (zh) * 2012-09-03 2014-03-26 中兴通讯股份有限公司 Ces数据发送方法、装置及ces数据接收方法、装置
US20160066198A1 (en) * 2013-05-03 2016-03-03 Interdigital Patent Holdings, Inc. Methods for wifi sectorization mac enhancement

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