WO2022088907A1 - Procédé, système et dispositif de transmission de signal cbr - Google Patents

Procédé, système et dispositif de transmission de signal cbr Download PDF

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Publication number
WO2022088907A1
WO2022088907A1 PCT/CN2021/115093 CN2021115093W WO2022088907A1 WO 2022088907 A1 WO2022088907 A1 WO 2022088907A1 CN 2021115093 W CN2021115093 W CN 2021115093W WO 2022088907 A1 WO2022088907 A1 WO 2022088907A1
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signal
rate
cbr
payload
service signal
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PCT/CN2021/115093
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English (en)
Chinese (zh)
Inventor
陶程
苑岩
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中兴通讯股份有限公司
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Publication of WO2022088907A1 publication Critical patent/WO2022088907A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method, system, and device for transmitting a CBR signal.
  • the CBR signal is usually first mapped to the fixed rate management service signal, and then the management service signal is mapped to the final service signal, and the final service signal is sent. to a specific physical medium.
  • CBR Constant Bit Rate
  • the CBR signal is transmitted in the Optical Transport Network (OTN)
  • the Optical Data Unit (ODU) signal is the fixed rate management service signal
  • the optical The channel transmission unit (Optical Transport Unit, OTU) signal is the final service signal.
  • the CBR signal when the CBR signal is transmitted in the OTN, the CBR signal is first mapped to the fixed rate ODU signal, and the ODU signal is used to implement the management of the CBR signal.
  • the payload in the ODU signal is used to carry the CBR signal, and the overhead in the ODU signal is used to manage the CBR signal in the OTN network transmission process.
  • the ODU signal includes the rate transparent transmission overhead JC of the CBR signal, which is used to implement the CBR signal.
  • the rate recovery after loading the ODU signal; the CBR signal can be mapped to the payload of the ODU signal by optional bit synchronous mapping (BMP), and the payload rate of the ODU signal is exactly equal to the rate of the CBR signal. There is no rate transparent transmission overhead.
  • the rate of the ODU signal is fixed. Then one or more ODU signals are loaded into the payload of the OTU signal for transmission, and the OTU signal is the final service signal for transmission in the optical fiber.
  • the OTU signal is also a fixed rate signal, and the rate transparent transmission overhead in the OTU signal is used to implement rate transparent transmission of one or more ODU signals.
  • a high-speed final service signal will be designed first, and its payload rate is greater than or equal to the sum of the rates of all management service signals, and this final Service signals have overhead to implement their management. Then it is necessary to design a management service signal whose rate matches the CBR signal, and a CBR signal is loaded into a management service signal to realize the management of the CBR signal.
  • the rate of the management service signal used in the transmission process must be a fixed rate.
  • the rate transparent transmission overhead needs to be increased when the CBR is loaded into the payload of the management service signal, and it is also necessary to load the management service signal into the payload of the final service signal.
  • Increase the rate transparent transmission overhead that is to say, it needs to deal with the two-level rate transparent transmission overhead.
  • the access sink of the CBR signal also needs to deal with the two-level rate transparent transmission overhead. Therefore, it is necessary to parse the transmitted data from the final service signal.
  • the rate of the management service signal must be restored first, that is, the rate transparent transmission overhead in the final service signal needs to be processed once, and then the rate transparent transmission overhead in the restored management service signal needs to be processed once. This requires that the final service signal must have an overhead for realizing rate transparent transmission, but the actual requirement is to realize the rate transparent transmission of the CBR signal.
  • the entire implementation process can be greatly simplified, thereby reducing the implementation cost, and at the same time, the The method of transparent transmission of the CBR signal rate is used in other application scenarios where the signal rate of the management service is not fixed, such as in Ethernet or flexE.
  • the purpose of the embodiments of the present application is to provide a CBR signal transmission method, system, and device, to solve the above-mentioned technical problems.
  • the embodiments of the present application provide a CBR signal transmission method, which is applied to the access source point of the CBR signal, including: acquiring the rate information of the CBR signal; according to the rate information of the CBR signal and The CBR signal generates a management service signal including a rate transparent transmission overhead and a payload, the rate transparent transmission overhead is used to record the rate transparent transmission information of the CBR signal, and the payload of the management service signal is used to carry the CBR signal; the management service signal is carried by the payload of the final service signal generated by the access source point, and the rate of the management service signal when the management service signal is carried according to the payload of the final service signal
  • the location of the transparent transmission overhead and the rate information of the CBR signal generate the rate transparent transmission information of the CBR signal; use the rate transparent transmission overhead to record the rate transparent transmission information, and send the final service signal to next transport node.
  • an embodiment of the present application further provides a method for transmitting a CBR signal, which is applied to an intermediate point of a final service signal, including: receiving the final signal sent by the access source point or an intermediate point before the current intermediate point.
  • the management service signal includes the rate transparent transmission overhead for recording the rate transparent transmission information of the CBR signal and the payload bearing the CBR signal; from The rate transparent transmission information of the CBR signal is obtained from the rate transparent transmission overhead; the location information of the rate transparent transmission overhead in the payload of the final service signal is obtained; according to the rate transparent transmission information and the location information to restore the rate information of the CBR signal; when the management service signal is borne by the payload of the final service signal generated by the intermediate point, and the management service signal is borne according to the payload of the final service signal, the The location of the rate transparent transmission overhead of the management service signal and the restored rate information of the CBR signal are used to regenerate the rate transparent transmission information of the CBR signal; the regenerated rate transparent transmission is recorded using the rate transparent transmission overhead. information, and send the final service signal to the next transmission node.
  • an embodiment of the present application further provides a method for transmitting a CBR signal, which is applied to an access sink point of a CBR signal, including: receiving the final service signal sent by the access source point or the intermediate point ; Take out the management service signal from the payload of the final service signal, and the management service signal includes the rate transparent transmission overhead of recording the rate transparent transmission information of the CBR signal and the payload of the CBR signal; Obtain the rate transparent transmission information of the CBR signal from the transmission overhead; obtain the location information of the rate transparent transmission overhead in the payload of the final service signal; restore the rate transparent transmission information according to the rate transparent transmission information and the location information rate information of the CBR signal; extracting the bit sequence value of the CBR signal from the payload of the management service signal; regenerating the CBR signal according to the rate information of the CBR signal and the bit sequence value.
  • an embodiment of the present application further provides a CBR signal transmission system, including: an access source point of the CBR signal and an access sink point of the CBR signal; the access source point is used to obtain the CBR signal The rate information of the signal; according to the rate information of the CBR signal and the CBR signal, a management service signal including rate transparent transmission overhead and payload is generated, and the rate transparent transmission overhead is used to record the rate transparent transmission information of the CBR signal , the payload of the management service signal is used to carry the CBR signal; the payload of the final service signal generated by the access source point is used to carry the management service signal, and according to the payload of the final service signal
  • the management service signal is used, the position of the rate transparent transmission overhead of the management service signal and the rate information of the CBR signal generate the rate transparent transmission information of the CBR signal; the rate transparent transmission overhead is used to record the rate transparent transmission information, and send the final service signal to the next transmission node; the access sink point is used to receive the final service signal sent by the access source
  • an embodiment of the present application further provides a CBR signal transmission device, comprising: a memory communicatively connected to the at least one processor; wherein the memory stores a memory that can be executed by the at least one processor. Instructions that are executed by the at least one processor to enable the at least one processor to perform any one of the CBR signaling methods described above.
  • FIG. 1 is a schematic diagram of the relationship between an access source point, an access sink point, and an intermediate point of a final service signal of a CBR signal in the CBR signal transmission method provided by the first embodiment of the present application;
  • FIG. 2 is a schematic diagram of the relationship among the CBR signal, the management service signal and the final service signal in the CBR signal transmission method provided by the first embodiment of the present application shown in FIG. 1;
  • FIG. 3 is a flowchart of a CBR signal transmission method provided by a second embodiment of the present application.
  • FIG. 4 is a flowchart of a CBR signal transmission method provided by a third embodiment of the present application.
  • FIG. 5 is a flowchart of a CBR signal transmission method provided by a fourth embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a CBR signal transmission system provided by a fifth embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a CBR signal transmission device provided by a sixth embodiment of the present application.
  • the first embodiment relates to a CBR signal transmission method.
  • a management service signal is generated according to the CBR signal and its rate information, the CBR signal is borne by the payload of the generated management service signal, and the access source
  • the payload of the final service signal generated by the ingress point carries the management service signal, and the CBR signal is generated according to the location of the rate transparent transmission overhead of the management service signal carried in the payload of the final service signal and the rate information of the CBR signal.
  • Rate transparent transmission information and then record the generated rate transparent transmission information into the rate transparent transmission overhead, and then send the final service signal after the above operation to the next transmission node, at the next transmission node, such as the middle point of the final service signal or
  • the access destination of the CBR signal only needs to recover the rate information of the CBR signal according to the content recorded in the rate transparent transmission overhead of the management service signal and the position of the rate transparent transmission overhead in the payload of the final service signal.
  • the rate transparent transmission information of the CBR signal only exists in the overhead of the management service signal, and does not need to occupy the overhead of the final service signal, so the final service signal does not need overhead to record It manages the rate transparent transmission of the service signal or the CBR signal, thereby reducing the difficulty of implementing the bit rate transparent transmission of the CBR signal.
  • the CBR signal transmission method provided in this embodiment is mainly applicable to the access source point, the access sink point of the CBR signal, and the intermediate point of the final service signal as the transmission medium.
  • any device can be used as both a provider of CBR signals and a receiver of CBR signals, such as the first device that receives the CBRi signal to the CBRk signal from the i port to the k port,
  • the CBR signal may be provided to the second device, or the CBR signal provided by the second device may be received.
  • a node for performing CBR service access mapping and demapping can be used as either an access source point or an access sink point of the CBR signal.
  • the final service signal of the transmission medium it can be transmitted backward or forward through any intermediate point to realize the transmission of the CBR signal.
  • the processing programs suitable for the access sink and intermediate points can be stored in the corresponding transmission nodes, that is, for each transmission node, only need to follow the The internally stored CBR signal transmission method can be processed, and there is no need to judge the access sink point and the intermediate point.
  • the CBR signal mentioned in this embodiment specifically refers to a signal with a fixed rate.
  • the signals that can be directly transmitted on the physical medium in a communication system are all fixed rate signals, such as the Ethernet physical layer.
  • the access source point used to receive the CBR signal may have one or more ports.
  • letters such as i, j, and k can be used to identify them.
  • the CBR signal received through the i port can be identified as CBRi
  • the CBR signal received through the j port can be identified as CBRj
  • the CBR signal received through the k port can be identified as CBRk, as shown in Figure 1, the CBRi signal to CBRk signal.
  • the above-mentioned CBR signals received through different ports may be of the same type or may be of different types.
  • the above-mentioned rate information specifically refers to the bit rate of the CBR signal.
  • the rate transparent transmission overhead is used to record the rate transparent transmission information of the CBR signal
  • the payload of the management service signal is used to carry the CBR signal
  • a fixed rate management service signal with the same bit rate as the CBR signal must be selected to carry the CBR signal, and the rate of each management service signal is managed by the rate transparent transmission overhead of the final service signal.
  • the payload of the management service signal is generated according to the bit rate of the CBR signal.
  • bit rate corresponding to the payload of the management service signal is the same as the bit rate of the CBR signal.
  • the bit rate corresponding to the payload of the management service signal is the same as the bit rate of the CBR signal, when the CBR signal is loaded into the payload of the management service signal generated in real time, the The payload can carry exactly the entire CBR signal.
  • the bit rate mentioned above refers to the number of bits transmitted per unit time.
  • the CBR signal loaded into the payload of the management service signal is essentially the bit sequence value of the CBR signal.
  • the CBR signal is loaded into the payload of the management service signal in a one-to-one manner, and a preset time granularity is added outside the payload of the management service signal for recording the CBR
  • the rate of the signal transparently transmits the information rate and the overhead of the transparent transmission.
  • overhead is mainly used to manage signals, such as the overhead in an Optical Data Unit (Optical Data Unit, ODU) signal, which is used to manage ODU signals.
  • ODU Optical Data Unit
  • the rate transparent transmission overhead mentioned in this embodiment is also used for managing signals, but in this embodiment, the rate transparent transmission overhead is specially used to record the rate transparent transmission information of the CBR signal to be transmitted.
  • the above-mentioned preset time granularity is related to the rate of the CBR signal and the quality of the restored CBR signal rate in practical applications.
  • the preset time granularity can be selected at millisecond intervals. For example, a CBR signal is received from the first device, and the CBR signal is loaded into the payload of the management service signal.
  • the preset time granularity is set to 1 millisecond and added every 1 millisecond. A rate transparent transmission overhead.
  • the first device continuously receives the CBR signal, and has no concept of time, and the time interval of the generated rate transparent transmission overhead is independent of the time length of the received CBR signal.
  • the management service signal is composed of the payload of the management service signal and the rate transparent transmission overhead.
  • the management service information used to carry the CBR signal is not selected from locally preset management service signals, but is generated in real time when the CBR signal is transmitted.
  • the payload rate of the payload of the generated management service signal is the same as the transmission rate of the CBR signal, so that the generated payload of the management service signal can be loaded with all the information of the CBR signal, so there is no need to limit the management service signal itself. That is, as long as the payload rate of the payload of the management service signal and the bit rate of the CBR signal follow, it is not necessary to consider whether the management service signal is a fixed rate management service signal.
  • the rate transparent transmission overhead of the rate transparent transmission information also includes the overhead for managing the management service signal, which is hereinafter referred to as management overhead for convenience of description.
  • the management service signal is composed of the payload of the management service signal and the rate transparent transmission overhead
  • the management overhead for managing the management service signal also needs to be added. That is, the payload of the management service signal plus the rate transparent transmission overhead and the management overhead constitute the management service signal.
  • the management service signal is borne by the payload of the final service signal generated by the access source point, and the rate of the management service signal when the management service signal is borne according to the payload of the final service signal
  • the position of the transparent transmission overhead and the rate information of the CBR signal generate the rate transparent transmission information of the CBR signal.
  • step (1.3) is essentially to load the management service signal into the payload of the final service signal generated by the access source point, and load the final service signal according to the The position of the rate transparent transmission overhead of the management service signal and the rate information of the CBR signal in the payload of the CBR signal generate the rate transparent transmission information of the CBR signal.
  • the management service signal when the management service signal is loaded into the payload of the final service signal generated by the access source point, the management service signal loaded or mapped with the CBR signal is specifically loaded.
  • the payload is loaded or mapped into the payload of the selected final service signal together with the rate-transmission overhead for carrying the transparent-transmission information.
  • the management service signal can be loaded or mapped into the payload of the final service signal generated by the access source point in a one-to-one manner, that is, a management service signal.
  • the service signal corresponds to a final service signal; the management service signal may also be loaded or mapped into the payload of the final service signal generated by the access source point in a many-to-one manner, that is, one or more
  • the management service signal corresponds to a final service signal.
  • this embodiment takes a many-to-one manner as an example, and is described in detail with reference to FIG. 2 .
  • the CBR signals are received through the ports i to k respectively.
  • the CBR signal received by the port is expressed as a CBRi signal
  • the CBR signal received through the k port is expressed as a CBRk signal; then, for the CBR signal received through each port, according to the rate information of the CBR signal, Specifically, the bit rate of the CBR signal generates a payload for carrying the management service signal of the CBR signal; then each CBR signal is loaded or mapped into the payload of the corresponding management service signal in a one-to-one manner, And add the rate transparent transmission overhead for recording the rate transparent transmission information of the corresponding CBR signal in addition to each management service signal at a preset time granularity, and then obtain the management service signal equipped with the CBR signal received through different ports, such as As shown in Figure 2, the management service signal i is generated according to the bit rate of the CBRi signal and the C
  • it may specifically be an Optical Transport Unit (Optical Transport Unit, OTU) signal.
  • OTU Optical Transport Unit
  • the final service signal is generated locally, that is, the generation of the final service signal is independent of the received CBR signal.
  • the above-mentioned final service signal not only includes the payload for carrying the management service signal, but also includes the management The overhead of the final service signal.
  • the rate transparent transmission information of the CBR signal in this embodiment is specifically the number of bits of the CBR signal in a certain time interval.
  • the time interval mentioned above is specifically determined according to the position of the rate transparent transmission overhead in the management service signal in the final service signal when the management service signal is loaded into the payload of the final service signal.
  • the time corresponding to the position of the rate transparent transmission overhead in the payload of the final service signal for each transmission is recorded.
  • the time interval of the time corresponding to the two consecutive transmissions of the rate transparent transmission overhead is recorded as the first time interval.
  • the number of bits of the CBR signal in the first time interval is counted according to the rate information of the CBR signal, and then the number of bits obtained by statistics is used as the rate transparent transmission information.
  • the time interval for determining the number of bits is the time interval when the transparent transmission overhead is mapped to the payload of the final service signal according to the rate of two consecutive transmissions. That is, by determining the time corresponding to the transparent transmission overhead of adjacent rates, the first time interval between the transparent transmission overheads of the rate transmitted two times in a row can be determined.
  • the time intervals at which the rate transparent transmission overheads appear are not required to be equal, that is, the first time intervals between the rate transparent transmission overheads of any two adjacent transmissions are not required to be the same.
  • the time interval allows a margin of error within 50%.
  • the CBR signal transmission solution provided in this embodiment greatly reduces the difficulty of management, making the present application easier to apply in practice.
  • Scenario 1 For the case where the signal to be transmitted is a CBR signal, the management service signal is an Optical Service Unit (OSU) signal, and the final service signal is an OTU signal.
  • OSU Optical Service Unit
  • the payload of the OSU signal with the same bit rate is generated according to the bit rate of the CBR signal, and the CBR signal is loaded into the payload of the OSU signal.
  • the rate transparent transmission overhead for storing the number of bits of the CBR signal and the management overhead for managing the OSU signal are added to the payload of the OSU signal at a preset time granularity, so as to obtain a complete.
  • the obtained OSU signal is loaded into the OTU signal, and finally the OTU signal carries the CBR signal and transmits it on the optical fiber until it reaches the access destination of the CBR signal, or the next management service signal.
  • the middle of the OSU signal point is the process of loading the CBR signal into the CBR signal.
  • Scenario 2 For the case where the signal to be transmitted is a CBR signal, the management service signal is a MAC frame of a specific vlan id, and the final service signal is an Ethernet phy signal.
  • the rate information used to record the CBR signal that is, the rate transparent transmission overhead of the number of bits is not independent of the payload, but is loaded into the MAC of a specific vlan id together with the CBR signal in the payload of the frame.
  • the first byte in the payload is used to indicate the type, and all the bytes starting from the second byte in the payload are used to install the CBR signal or the rate transparent transmission depending on the type. overhead.
  • Scenario 3 The signal to be transmitted is the CBR signal, the management service signal is the FlexE client, and the final service signal is the FlexE group.
  • the CBR signal is encapsulated into a fixed-length data packet, and then converted into 64B/66B encoding, and the rate transparent transmission overhead is periodically inserted, and the rate transparent transmission overhead is 64B.
  • the specific control code and data code of /66B encoding exist, and the idle control code encoded by 64B/66B is added to form the FlexE client signal, the obtained FlexE client is loaded into the time slot of the FlexE group, and the FlexE group overhead is added to finally obtain the FlexE The group signal is transmitted to the next transmission node through the FlexE network.
  • the CBR signal transmission method provided in this embodiment may be applied to different network scenarios, such as an OTN network and a FlexE network. Therefore, when the finally obtained final service signal is sent to the next transmission node, it will vary according to different applied network scenarios.
  • the applied network scenario is an OTN network
  • the final service signal is sent to the OTN network and transmitted to the next transmission node through the OTN network.
  • the final service signal is specifically sent to the FlexE network, and transmitted to the next transmission node through the FlexE network.
  • At least one intermediate point of the final service signal may be involved in the middle, or it may not be involved. That is, the above-mentioned next transmission node may be the access destination of the CBR signal, or may be the intermediate point of the final service signal.
  • the rate transparent transmission information recorded in the rate transparent transmission overhead is essentially the number of bits corresponding to the CBR signal in the first time interval.
  • the number of payloads loaded into the management service signal is not necessarily equal to the number of bits received, that is, there may be 10 bits received, but only 8 bits are actually loaded. . Therefore, the rate transparent transmission information stored in the above rate transparent transmission overhead is essentially the number of bits corresponding to the CBR signal in the first time interval.
  • the rate information of the CBR signal that is, the bit rate of the CBR signal according to the number of bits taken out
  • the time corresponding to the position of the rate transparent transmission overhead taken out each time in the payload of the final service signal, and then the time interval between the times corresponding to the rate transparent transmission overhead taken out twice in a row is recorded. for the second time interval.
  • the rate information of the CBR signal can be restored according to the determined second time interval and the number of bits taken out from the rate transparent transmission overhead.
  • the second time interval between the rate transparent transmission overheads obtained twice in any adjacent manner is not required to be the same.
  • the management service signal is carried by the payload of the final service signal generated by the intermediate point, and when the management service signal is carried according to the payload of the final service signal, the rate of the management service signal is transparently transmitted.
  • the location of the overhead and the restored rate information of the CBR signal regenerate the rate transparent transmission information of the CBR signal.
  • the operation of regenerating the rate transparent transmission information of the CBR signal is specifically: recording the management service signal in the process of loading the payload of the final service signal, each time the transmission is performed.
  • the time corresponding to the position of the rate transparent transmission overhead in the payload of the final service signal; the time interval between the times corresponding to the transmission of the rate transparent transmission overhead for two consecutive times is recorded as the third time interval;
  • the third time interval between the rate transparent transmission overheads of two adjacent transmissions is not required to be the same; the number of bits of the CBR signal in the third time interval is counted according to the restored rate information of the CBR signal; The number of bits is used as the regenerated rate transparent transmission information.
  • the rate information of the CBR signal can be restored, and then according to the restored rate information and the rate transparent transmission overhead of the management service signal, it is reloaded into the payload of the final service signal generated by the intermediate point. to determine the new time interval, and then add the recalculated number of bits to the rate transparent transmission overhead as the rate transparent transmission information, and continue to transmit the final service signal backwards.
  • the management service signal still includes the rate transparent transmission overhead that records the rate transparent transmission information of the CBR signal and the payload that bears the CBR signal.
  • the rate information of the CBR signal that is, the bit rate of the CBR signal according to the number of bits taken out
  • the time corresponding to the position of the rate transparent transmission overhead extracted each time in the payload of the final service signal, and then the rate corresponding to the transparent transmission overhead is extracted twice adjacently. The time interval is recorded as the fourth time interval.
  • the rate information of the CBR signal can be restored according to the determined fourth time interval and the number of bits taken out from the rate transparent transmission overhead.
  • the fourth time interval between the rate transparent transmission overheads obtained twice in any adjacent manner is not required to be the same.
  • the current transmission node when the current transmission node is the access sink, it is only necessary to extract the management service signal from the payload of the received final service signal, and then extract the CBR signal from the rate transparent transmission overhead of the management service signal.
  • Rate transparent transmission information and determine the time interval according to the position of the extracted rate transparent transmission overhead, and then restore the rate information of the CBR signal according to the determined time interval and the extracted rate transparent transmission information, and then according to the restored rate information and from the management service signal
  • the CBR signal is regenerated from the bit sequence value of the CBR signal taken out of the payload of the The number of bits can quickly and accurately determine the rate information of the CBR signal, which simplifies the processing operations involved in the transmission process as much as possible, thereby improving the transmission efficiency.
  • the CBR signal transmission method provided in this embodiment is suitable for loading one or more CBR signals into the corresponding management service signal in a one-to-one manner, and one or more management service signals in multiple Loaded into a final service signal in a one-to-one manner, and finally realizes a scenario in which one or more CBR signals are transmitted in a final service signal.
  • the CBR signal transmission method provided in this embodiment improves the method for realizing the bit rate transparent transmission of the CBR signal in some cases.
  • the management service signal is not required to be a signal with a fixed rate, and the overhead of the final service signal is not used in the process of realizing the bit rate transparent transmission of the CBR signal, only the overhead of the management service signal is used, thereby reducing the management difficulty.
  • the rate transparent transmission function of the CBR signal is a function related to the CBR signal, so it only needs to use the overhead of the corresponding management service signal, and does not need to occupy the final service signal that is not directly related to it. overhead.
  • the CBR signal transmission method provided in this embodiment does not require equal intervals between the occurrences of the rate transparent transmission overhead in the management service signal, so that both the final service signal and the management service signal may be signals with variable rates.
  • the first final service signal Before sending the final service signal obtained according to the above operations (hereinafter referred to as the first final service signal) to the next transmission node, it may be detected whether the final service signal remapping is received. transmission needs.
  • the final service signal remapping transmission requirement mentioned in this embodiment may be provided by a technician based on optical fiber service requirements.
  • the final service signal remapping transmission requirement it is specified that the The final service signal, that is, the final service signal to which the first final service signal is remapped (for convenience of distinction, it is hereinafter referred to as: the second final service signal).
  • the final service signal remapping transmission requirement may be generated locally, or may be received in real time according to an actual situation, which is not limited in this embodiment.
  • the first final service signal is directly sent to the next transmission node; otherwise, the second final service signal needs to be selected for remapping transmission according to the final service signal, and then the first final service signal is transmitted. It is mapped to the selected second final service signal, and finally the second final service signal is sent to the next transmission node.
  • one or more management service signals can be loaded into the payload of the same final service signal, that is, the relationship between the management service signal and the final service signal can be many pairs First, in order to ensure that all the information of the CBR signal contained in each management service signal can be loaded into the payload of the final service signal, and to ensure that the bit rate of the payload of the final service signal is not affected during the transmission process. , will not affect the CBR signal loaded in it, thereby ensuring the integrity and accuracy of the transmitted CBR signal.
  • the final service signal used to load the management service signal needs to satisfy the bit rate of the payload greater than or A requirement equal to the sum of the bit rates of one or more of the management service signals.
  • the bit rate of each management service signal needs to be counted, and then the sum of the bit rates of one or more management service signals is obtained.
  • bit rate of the payload of the final service signal is equal to the sum of the bit rates of one or more of the management service signals
  • directly loading one or more of the management service signals into the final service signal In the payload of the signal when the bit rate of the payload of the final service signal is greater than the sum of the bit rates of one or more of the management service signals, first load one or more of the management service signals into the payload of the final service signal, and then use preset padding information such as "0", or "1", or a special control code, such as the 64B/66B coded idle control code, etc., to the final service signal.
  • the payload is filled, so that the sum of the bit rates of one or more of the management service signals plus the rate of the preset padding information filled is equal to the bit rate of the payload of the final service signal, thereby ensuring the transmission process. will not affect the CBR signal mapped in it.
  • the second embodiment relates to a CBR signal transmission method.
  • the CBR signal transmission method provided in the second embodiment is specifically applied to the access source point of the CBR signal.
  • the following describes the CBR signal transmission method involved in this embodiment in detail with reference to FIG. 3 . .
  • Step 301 Acquire rate information of the CBR signal.
  • Step 302 Generate a management service signal including a rate transparent transmission overhead and a payload according to the rate information of the CBR signal and the CBR signal, where the rate transparent transmission overhead is used to record the rate transparent transmission information of the CBR signal, so The payload of the management service signal is used to carry the CBR signal.
  • Step 303 The management service signal is carried by the payload of the final service signal generated by the access source point, and the rate of the management service signal when the management service signal is carried according to the payload of the final service signal.
  • the position of the transparent transmission overhead and the rate information of the CBR signal generate the rate transparent transmission information of the CBR signal.
  • Step 304 Record the rate transparent transmission information by using the rate transparent transmission overhead, and send the final service signal to the next transmission node.
  • steps 301 to 304 provided in this embodiment are substantially the same as the steps (1.1) to (1.4) for the access source point of the CBR signal in the first embodiment, that is, this embodiment can be used with the first embodiment.
  • the embodiments are implemented in cooperation with each other. Therefore, the related technical details mentioned in the first embodiment are still valid in this embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.
  • the third embodiment relates to a CBR signal transmission method.
  • the CBR signal transmission method provided in the third embodiment is specifically applied to the intermediate point of the final service signal.
  • the CBR signal transmission method involved in this embodiment is specifically described below with reference to FIG. 4 .
  • Step 401 Receive the final service signal sent by the access source point or an intermediate point before the current intermediate point.
  • Step 402 Extract the management service signal from the payload of the final service signal, where the management service signal includes a rate transparent transmission overhead for recording rate transparent transmission information of the CBR signal and a payload carrying the CBR signal.
  • Step 403 Extract the rate transparent transmission information of the CBR signal from the rate transparent transmission overhead.
  • Step 404 Obtain location information of the rate transparent transmission overhead in the payload of the final service signal.
  • Step 405 Restore the rate information of the CBR signal according to the rate transparent transmission information and the location information.
  • Step 406 Use the payload of the final service signal generated by the intermediate point to carry the management service signal, and transparently transmit the rate of the management service signal when the management service signal is carried according to the payload of the final service signal.
  • the location of the overhead and the restored rate information of the CBR signal regenerate the rate transparent transmission information of the CBR signal.
  • Step 407 Record the regenerated rate transparent transmission information by using the rate transparent transmission overhead, and send the final service signal to the next transmission node.
  • steps 401 to 407 provided in this embodiment are substantially the same as the steps (2.1) to (2.3) for the intermediate point of the final service signal in the first embodiment, that is, this embodiment can be similar to the first embodiment. Examples are implemented in conjunction with each other. Therefore, the related technical details mentioned in the first embodiment are still valid in this embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.
  • the fourth embodiment relates to a CBR signal transmission method.
  • the CBR signal transmission method provided in the fourth embodiment is specifically applied to the access sink of the CBR signal.
  • the following describes the CBR signal transmission method involved in this embodiment in detail with reference to FIG. 5 . .
  • Step 501 Receive the final service signal sent by the access source point or the intermediate point.
  • Step 502 Extract a management service signal from the payload of the final service signal, where the management service signal includes a rate transparent transmission overhead for recording rate transparent transmission information of the CBR signal and a payload carrying the CBR signal.
  • Step 503 Extract the rate transparent transmission information of the CBR signal from the rate transparent transmission overhead.
  • Step 504 Obtain location information of the rate transparent transmission overhead in the payload of the final service signal.
  • Step 505 Restore the rate information of the CBR signal according to the rate transparent transmission information and the location information.
  • Step 506 Extract the bit sequence value of the CBR signal from the payload of the management service signal.
  • Step 507 Regenerate the CBR signal according to the rate information of the CBR signal and the bit sequence value.
  • steps 501 to 507 provided in this embodiment are substantially the same as steps (3.1) to (3.3) for the intermediate point of the final service signal in the first embodiment, that is, this embodiment can be similar to the first embodiment. Examples are implemented in conjunction with each other. Therefore, the related technical details mentioned in the first embodiment are still valid in this embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.
  • the fifth embodiment of the present application relates to a CBR signal transmission system, as shown in FIG. 6 , including: a CBR signal access source point 601 and a CBR signal access sink point 602 .
  • the access source point 601 of the CBR signal is used to obtain the rate information of the CBR signal; according to the rate information of the CBR signal and the CBR signal, the management service signal including the rate transparent transmission overhead and payload is generated.
  • the rate transparent transmission overhead is used to record the rate transparent transmission information of the CBR signal, and the payload of the management service signal is used to carry the CBR signal; the payload of the final service signal generated by the access source point is used to carry the the management service signal, and the CBR is generated according to the location where the rate transparent transmission overhead of the management service signal is located when the payload of the final service signal carries the management service signal and the rate information of the CBR signal.
  • the access sink point 602 of the CBR signal is configured to receive the final service signal sent by the access source point; extract the management service signal from the payload of the final service signal, and the management service signal includes recording the CBR signal The rate transparent transmission overhead of the rate transparent transmission information and the payload carrying the CBR signal; extract the rate transparent transmission information of the CBR signal from the rate transparent transmission overhead; obtain the rate transparent transmission overhead in the final location information in the payload of the service signal; restore the rate information of the CBR signal according to the rate transparent transmission information and the location information; extract the bit sequence value of the CBR signal from the payload of the management service signal ; Regenerate the CBR signal according to the rate information of the CBR signal and the bit sequence value.
  • the CBR signal may also pass through at least one intermediate point of the final service signal in the process of being transmitted from the access source point to the access sink point.
  • the CBR signal transmission system provided in this embodiment may further include several intermediate points of the final service signal.
  • the intermediate point of the final service signal is used to receive the final service signal sent by the access source point or an intermediate point before the current intermediate point; from the payload of the final service signal Take out the management service signal, where the management service signal includes a rate transparent transmission overhead that records the rate transparent transmission information of the CBR signal and a payload that carries the CBR signal; and extracts the CBR signal from the rate transparent transmission overhead.
  • rate transparent transmission information obtain the location information of the rate transparent transmission overhead in the payload of the final service signal; restore the rate information of the CBR signal according to the rate transparent transmission information and the location information; use the The payload of the final service signal generated by the intermediate point bears the management service signal, and when the payload of the final service signal bears the management service signal, the position and the rate of the transparent transmission overhead of the management service signal are located and The restored rate information of the CBR signal regenerates the rate transparent transmission information of the CBR signal; the regenerated rate transparent transmission information is recorded using the rate transparent transmission overhead, and the final service signal is sent down a transport node.
  • the access sink 602 of the CBR signal is further configured to receive the final service signal sent by the intermediate point; extracting the management service signal from the payload; extracting the rate transparent transmission information of the CBR signal from the rate transparent transmission overhead; obtaining the location information of the rate transparent transmission overhead in the payload of the final service signal; according to the restore the rate information of the CBR signal from the rate transparent transmission information and the location information; extract the bit sequence value of the CBR signal from the payload of the management service signal; according to the rate information of the CBR signal and the bits The sequence value reproduces the CBR signal.
  • the sixth embodiment of the present application relates to a CBR signal transmission device, as shown in FIG. 7 , including: at least one processor 701 ; and a memory 702 communicatively connected to the at least one processor 701 ; wherein, the memory 702 stores Instructions executable by at least one processor 701, where the instructions are executed by at least one processor 701 to enable at least one processor 701 to execute the signal transmission method described in any of the above method embodiments.
  • the memory 702 and the processor 701 are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors 701 and various circuits of the memory 702 together.
  • the bus may also connect together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein.
  • the bus interface provides the interface between the bus and the transceiver.
  • a transceiver may be one element or one or more elements, such as one or more receivers and transmitters, that provide means for communicating with various other devices over a transmission medium.
  • the data processed by the processor 701 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor 701 .
  • Processor 701 is responsible for managing the bus and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management, and other control functions.
  • the memory 702 may be used to store data used by the processor 701 in performing operations.
  • the signal transmission device can execute the signal transmission method described in any of the above method embodiments, in practical applications, the signal transmission device may be applied to the access source point of the CBR signal. , or it can be applied to the access sink point of the CBR signal, or it can be applied to the intermediate point of the final service signal.
  • a management service signal is generated according to the CBR signal and its rate information, and the payload of the generated management service signal carries the CBR Signal, the payload of the final service signal generated by the access source point carries the management service signal, and is generated according to the location of the rate transparent transmission overhead of the management service signal in the payload of the final service signal and the rate information of the CBR signal.
  • the rate transparent transmission information of the CBR signal, and then the generated rate transparent transmission information is recorded in the rate transparent transmission overhead.
  • the final service signal that has completed the above operations is sent to the next transmission node.
  • the next transmission node such as the intermediate point of the final service signal or the access sink of the CBR signal, it only needs to record in the transparent transmission overhead according to the rate of the management service signal.
  • the rate information of the CBR signal can be recovered from the position of the content and rate transparent transmission overhead in the payload of the final service signal, without paying attention to the rate information of the management service signal, and in this way, the rate of the CBR signal is transparently transmitted
  • the information only exists in the overhead of the management service signal, and does not need to occupy the overhead of the final service signal, so the final service signal does not need the overhead to record the rate of the management service signal or the transparent transmission information of the CBR signal, thereby reducing the bit rate of the CBR signal. Difficulty of implementation.
  • the CBR signal transmission method and system that is, the device provided in this embodiment, since the access source point and the access sink point of the CBR signal only need to perform a rate transparent transmission overhead processing operation, the CBR is improved as a whole. signal transmission efficiency.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

La présente demande divulgue un procédé, un système et un dispositif de transmission de signal CBR. Dans la présente demande, un signal de service de gestion est généré au niveau d'un point de source d'accès d'un signal CBR en fonction du signal CBR et des informations de débit de celui-ci ; le signal CBR est transporté par une charge utile du signal de service de gestion généré ; le signal de service de gestion est transporté par une charge utile d'un signal de service final généré par le point de source d'accès ; et des informations de passage de débit du signal CBR sont générées en fonction de la position où le surdébit de passage de débit du signal de service de gestion est localisé et des informations de débit du signal CBR dans la charge utile du signal de service final, ce qui permet d'enregistrer les informations de passage de débit générées dans le surdébit de passage de débit.
PCT/CN2021/115093 2020-10-26 2021-08-27 Procédé, système et dispositif de transmission de signal cbr WO2022088907A1 (fr)

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