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WO2018121223A1 - Procédé, dispositif et système de transmission de signal - Google Patents

Procédé, dispositif et système de transmission de signal Download PDF

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Publication number
WO2018121223A1
WO2018121223A1 PCT/CN2017/115253 CN2017115253W WO2018121223A1 WO 2018121223 A1 WO2018121223 A1 WO 2018121223A1 CN 2017115253 W CN2017115253 W CN 2017115253W WO 2018121223 A1 WO2018121223 A1 WO 2018121223A1
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WIPO (PCT)
Prior art keywords
signal
data
client signal
client
transmission
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PCT/CN2017/115253
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English (en)
Chinese (zh)
Inventor
操时宜
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华为技术有限公司
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Publication of WO2018121223A1 publication Critical patent/WO2018121223A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1652—Optical Transport Network [OTN]
    • 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

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a signal transmission method, apparatus, and system.
  • the bit rate corresponding to single-wavelength or single-channel in optical transmission networks is now larger, for example, the bit rate of single-wavelength is gradually upgraded from 10 Gb/s (Gigabytes per second) to 100 Gb/s.
  • the ZigBee Zigbee Protocol
  • WiFi Wireless Fidelity
  • Another feature of this type of business is that it is basically less sensitive to latency. How to carry these relatively low-rate, less-sensitive services in high-speed optical transport networks is a problem.
  • Embodiments of the present invention provide a signal transmission method, apparatus, and system for transmitting services having different transmission performance requirements.
  • a signal transmission method including: receiving at least one first client signal and at least one second client signal;
  • Compressing at least one bit rate required for the first client signal transmission inserting data of at least one second client signal to form at least one synthesized signal; and transmitting the at least one synthesized signal.
  • the sending the at least one composite signal comprises: packaging the at least one composite signal into an optical transport network OTN container to form at least one OTN signal, and transmitting the at least one All the way OTN signal.
  • the compressing the bit rate required for the at least one first client signal transmission comprises: transcoding the data of the at least one first client signal to compress The at least one first client signal transmits a desired bit rate.
  • the compressing at least one bit rate required by the first client signal transmission, inserting at least one data of the second client signal, forming at least one synthesized signal including: deleting the Determining, in the at least one second client signal, partial data indicating idleness; compressing a bit rate required for the at least one first client signal transmission, inserting at least one data of deleting the second client signal after indicating the idle partial data, forming At least one way to synthesize the signal.
  • the compressing at least one bit rate required by the first client signal transmission, inserting data of the at least one second client signal, forming the at least one synthesized signal comprises: compressing the And transmitting, by the at least one first client signal, a bit rate required to insert at least one of the client data in the second client signal and the identifier of the at least one second client signal to form at least one synthesized signal.
  • a second aspect provides a signal transmission method, including: receiving at least one first client signal and at least one second client signal; and replacing at least one of the at least one first client signal with data of at least one second client signal Forming at least one composite signal; transmitting the at least one composite signal.
  • the sending the at least one composite signal comprises: packaging the at least one composite signal into an optical transport network OTN container to form at least one OTN signal, and transmitting the at least one All the way OTN signal.
  • the replacing, by the data of the at least one second client signal, part of the data in the at least one first client signal comprises: using data of at least one second client signal Replacing at least one of the first client signals indicating partial data that is idle.
  • the data of the at least one first client signal is replaced by the data of the at least one second client signal to form at least one synthesized signal, including: using at least one way The customer data of the second client signal and the identifier of the at least one second client signal replace at least one of the at least one first client signal to form at least one composite signal.
  • a third aspect provides a signal transmission method, including: receiving at least one synthesized signal, and separating at least one first client signal and at least one second client signal from the at least one synthesized signal; wherein the at least one synthesized signal Obtaining, by compressing the bit rate required by the at least one first client signal transmission, inserting data of at least one second client signal; or replacing the at least one synthesized signal by replacing data with at least one second client signal Obtained by the at least one of the first client signals; and outputting the at least one first client signal and the at least one second client signal.
  • a signal transmission apparatus comprising: a receiving unit, a processing unit, and a transmitting unit, the receiving unit is configured to receive at least one first client signal and at least one second client signal
  • the processing unit is configured to: compress a bit rate required for the at least one first client signal transmission, insert at least one data of the second client signal to form at least one synthesized signal; or use at least one second client signal
  • the data replaces part of the data in the at least one first client signal to form at least one synthesized signal
  • the transmitting unit is configured to send the at least one synthesized signal.
  • the sending, by the sending unit, the at least one combined signal comprises: the sending unit encapsulating the at least one combined signal into an optical transport network OTN container to form at least one OTN Signaling, transmitting the at least one OTN signal.
  • the processing unit is configured to compress, by transcoding the data of the at least one first client signal, to compress a bit required for the at least one first client signal transmission rate.
  • the processing unit is configured to replace, by the data of the at least one second client signal, the partial data indicating the idleness in the at least one first client signal.
  • the processing unit is configured to: delete part of the at least one second client signal indicating that the data is idle; and compress the at least one first client signal to transmit a bit rate, inserting at least one way to delete data of the second client signal after indicating the idle partial data, forming at least one synthesized signal; or replacing the first data with the second client signal after deleting at least one of the idle partial data Part of the data in the client signal forms at least one composite signal.
  • the processing unit inserting at least one second client signal into a partial bit of the first client signal to form a composite signal includes: the processing unit is in the Inserting at least one of the client data in the second client signal and the identifier of the at least one second client signal into a partial signal of a client signal to form a composite signal
  • a fifth aspect provides a signal transmission apparatus, including: a receiving unit, a processing unit, and a transmitting unit, wherein the receiving unit is configured to receive at least one synthesized signal; the processing unit is configured to separate from the at least one synthesized signal And generating at least one first client signal and at least one second client signal, wherein the at least one composite signal is a bit rate required to transmit the at least one first client signal, and inserting data of at least one second client signal Obtaining; or the at least one synthesized signal is obtained by replacing part of data in the at least one first client signal with data of at least one second client signal; the transmitting unit is configured to output the first client Signal and the second client signal.
  • the processing unit separates the at least one first client signal and the at least one second client signal from the at least one synthesized signal, including: the processing unit from the The data of the at least one second client signal is separated from the at least one synthesized signal, and the partial data indicating the idle is added to form at least one second client signal.
  • a delivery system comprising the delivery device of the fourth aspect and the delivery device of the fifth aspect is provided.
  • the signal transmission scheme provided by the embodiment of the present invention converts the bit rate required for the first client signal transmission, inserts at least one data of the second client signal to form at least one synthesized signal, or replaces the data with at least one second client signal.
  • the partial data in the at least one first client signal forms at least one synthesized signal, and the transmission of the second client signal is realized without affecting the transmission of the first client signal, thereby improving transmission efficiency and saving transmission resources.
  • FIG. 1 is a schematic diagram of a network structure of a low-rate service during network transmission according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a signal transmission method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a client signal format according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a format of an idle control block provided by an entity according to the present invention.
  • FIG. 5 is a schematic structural diagram of a transmitting apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another signal transmission method according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another transmitting apparatus according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of another transmitting apparatus according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a transmission system according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a network structure of a low-rate service during network transmission.
  • a ZigBee service needs to be sent to an optical transport network for transmission after layer-level convergence.
  • the rate of the ZigBee signal is 250Kb/s.
  • the n-way ZigBee signals are first aggregated into 10/100M Ethernet services, and then the 10/100M Ethernet services are connected at the access switch/router. Gathering into a GE (1Gb/s Ethernet Ethernet) service, the GE service is aggregated into a 10GE (10Gbps Ethernet) service at the aggregation switch/router.
  • the 10GE When it is sent to the optical transmission access device, the 10GE is encapsulated into the OTU2 (Optical channel).
  • Transport Unit-2 optical channel data unit-2, with a bit rate of about 10Gb/s
  • OTU4 optical channel Transport Unit-4, optical channel data unit - 4, the bit rate is around 100Gb / s
  • the OTU4 service is then passed through the optical transmission aggregation device, the optical transmission access device, the aggregation switch/router device, and the ZigBee collection and copy center, which is equivalent to the above-mentioned reverse process, that is, the ZigBee service is extracted from the OTU4 service layer, and will not be described again.
  • the VR/AR service can be accessed at the aggregation switch/router because of the large bit rate.
  • the VR/AR and ZigBee services are processed at different aggregation switches/routers and then connected to the same optical transport access device.
  • the optical transmission access device encapsulates the data corresponding to the VR/AR service and the ZigBee service into the OTU2 container, and then does not distinguish the data corresponding to different services in the optical transport network, and the data corresponding to all the services are transparently transmitted, ensuring bandwidth and delay.
  • low-rate services such as ZigBee: first, the cost of transmission is too high, and it is subject to multiple aggregation/distribution processing; secondly, for optical transport networks, because of the rate of such services relative to the optical transport network.
  • the transmission pipeline rate is too low, and generally does not directly support the access of such services, so optical transport network operators or equipment manufacturers cannot obtain direct economic benefits from the transmission of such services.
  • different types of service hybrid transmission the data corresponding to different types of services are not distinguished in the optical transport network, and the transmission performance is guaranteed to be very high, so that the efficiency and bandwidth utilization are insufficient for the transport network. high.
  • the main feature of the Ethernet service is bursty, that is, the physical bit rate of the Ethernet service (the bit rate of data carrying useful information) is not fixed, and the optical transmission is not fixed.
  • the bit rate corresponding to the transmission channel in the network is basically fixed.
  • the Ethernet signal is encapsulated into the transport container (generally an OTN container, other types of containers can be similarly processed, and the definition of the OTN container is defined in the ITU-T G.709 standard), and the ether is deleted or compressed.
  • the transport container generally an OTN container, other types of containers can be similarly processed, and the definition of the OTN container is defined in the ITU-T G.709 standard
  • the ether is deleted or compressed.
  • Data in the network signal that does not affect information integrity, insert low-rate signals or transmit data with lower performance requirements, extract low-rate signals or transmit lower-performance signals at the exit of the Ethernet signal from the transport container.
  • the transmission cost is basically zero (the overall transmission cost is basically the same as the cost of the individual transmission Ethernet signals, and the Ethernet signal is originally required to be transmitted). It is equivalent to dividing the existing transmission channel into two parts, one is the Ethernet transmission with constant bit rate change (can be expanded into high priority service), and the other is the fixed bit rate minus the remaining part of the Ethernet substantial bit rate. This remainder is used to transmit low-rate signals or to transmit signals with lower performance requirements (which can be extended to low-priority services), and is equivalent to adding a transport plane to the optical transport network.
  • FIG. 2 is a flowchart of a signal transmission method according to an embodiment of the present invention. Referring to FIG. 2, the specific process of the method includes:
  • S201 Receive at least one first client signal and at least one second client signal.
  • the at least one first client signal received by the transmitting device may include an x-way first client signal, and x is a positive integer, that is, the first client signal-1 to the first client signal-x, for example, including the first client signal-1 And the first client signal-2 two-way signal, the first client signal can correspond to a high-priority service, or can be a main service of the optical transport network.
  • S202 Compress the bit rate required for the at least one first client signal transmission, insert at least one data of the second client signal to form at least one synthesized signal, or replace the at least one path with data of at least one second client signal. Part of the data in a client signal forming at least one composite signal;
  • the second client signal inserted by the transmitting device in the first client signal may include a second client signal, that is, a second client signal-1 to a second client signal-y, for example, including the second client signal-1 and
  • the second client signal-2 two-way signal the second client signal may correspond to a low-priority service, such as a service with low rate or low transmission performance requirements.
  • Compressing the bit rate required for the at least one first client signal transmission may include compressing the bit rate required for the at least one first client signal transmission by transcoding the data of the at least one first client signal.
  • a part of the bits of the first client signal may be obtained by compressing a part of the data in the first client signal, and the partially compressed data may be data that does not affect the integrity of the information.
  • the number of bits occupied by the second client signal data may be obtained by transcoding the data block of the first client signal, reducing or removing the data block synchronization header of the first client signal to obtain redundant bits to carry the second client signal. No more than the number of bits of the first client signal due to transcoding.
  • the S202 step compresses at least one bit rate required for the first client signal transmission, inserts at least one second client signal data, but inserts the second client signal into the first client signal to form a combined signal.
  • at least one synthesized signal may also be formed by replacing at least one partial data in the first client signal with data of at least one second client signal.
  • part or all of the data of at least one of the first client signals may be replaced with at least one of the first client signals indicating that the idle data is available, for example, may replace some or all of the idleness of the first client signal (Idle). Code or Idle control block.
  • the embodiment of the present invention may replace at least one of the first client signals with at least one of the client data of the second client signal and the identifier of the at least one second client signal to form at least one combined signal, that is, insert at least one way
  • at least one identifier of the second client signal may be inserted, for example, the identification information of the number of ways to identify the second client signal is inserted, and the geographical location information of the device may also be inserted.
  • the transmitting the at least one composite signal may include: encapsulating the at least one composite signal into an optical transport network OTN container to form at least one OTN signal, and transmitting the at least one OTN signal.
  • the transmitting device may map, encapsulate, and encapsulate the synthesized signal into an OTN bearer signal (eg, an ODU), add an OTU overhead byte, and an FA overhead byte to form an OTU signal (eg, an OTU), and then transmit the OTU signal.
  • an OTN bearer signal eg, an ODU
  • add an OTU overhead byte, and an FA overhead byte to form an OTU signal (eg, an OTU)
  • an OTU signal eg, an OTU
  • the at least one synthesized signal refers to a signal including part or all of the data of the at least one first client signal, and at least one or all of the data of the second client signal, and the form is not limited herein.
  • the signal may be any type of signal, such as an OPU (Optical Channel Payload Unit) signal, or an OTN bearer signal itself; or may not be mapped.
  • the signal transmission method of the embodiment of the present invention may further include the step of pre-processing the first client signal.
  • the preprocessing includes synchronization of bit blocks, 66B block (66 bits block) has a synchronization header of 2 bits, 01 indicates a data block, and 10 indicates a control block, and synchronization The header is not scrambled.
  • One method of bit block synchronization is to detect 01 or 10 at a fixed position of 66 bits. The fixed position at this time is the position where the sync head is located, and the position where the 66B block starts. When the position of the sync head is found, it can be synchronized.
  • the pre-processing may also include an AM (Alignment Marker) lock.
  • the pre-processing may also include a PCS BIP-8 error Mask (Physical Coding Sublayer Bit Interleaved Parity-8 error Mask), assuming that the input interface of the 100GBASE-R is an additional interface. Unit (CAUI, 100 Gb/s Attachment Unit Interface), because the additional interface unit processes the scrambled data, and the subsequent processing needs to descramble and insert the data of the second client signal, which will break the BIP transparency of the first client signal. Sex, so BIP-8 needs to be processed to complete the BIP error Mask calculation. Since the data of the additional interface unit is scrambled, the pre-processing may also include decoding.
  • pre-insertion processing Before inserting at least one second client signal in step S202, pre-insertion processing may be performed on the second client signal, the pre-insertion processing includes deleting part of the data indicating the idleness in the second client signal, and at least compressing the at least one channel After the first client signal transmits the required bit rate, it is inserted at least one way to delete the data of the second client signal after indicating the free partial data.
  • the second client signal input may be 4B/5B data. If the original data in the first client signal is processed and the data that can be inserted has a corresponding bandwidth that is large enough, the 4B/5B data can be directly inserted, that is, all the data of the second client signal is inserted.
  • the idle code in the second client signal 4B/5B data may be deleted, that is, the partial data indicating the idleness in the second client signal is deleted.
  • a second client signal that deletes the idle code is then inserted into the first client signal. That is, in this embodiment, the data for inserting at least one second client signal may be all data of the second client signal, or may be partial data of the second client signal, such as data with the idle code deleted.
  • the manner in which the second client signal is inserted in the first client signal in step S202 can be in various ways.
  • the first client signal can be packaged into a corresponding transport container, for example, a 100GBase-R signal can be encapsulated into an OPU4 (Optical Channel Payload Unit-4).
  • OPU4 Optical Channel Payload Unit-4
  • the bit rate of the data of the first client signal can be compressed by the encoding mode of 512B/513B for inserting all or part of the data of the second client signal.
  • the total data bit rate does not increase, and no change to the transmitter is required, and the original line transmission mode of the first client signal is There is basically no change and will not affect the transmission of the first customer signal.
  • the data format of the first client signal is 64B/66B
  • the data of the second client signal can be encoded into the 5B/15B format and inserted into the first
  • a customer model number is encoded in the 513B data.
  • 528B is compressed into 513B, and the bit rate is reduced.
  • the data of the second client signal of 15B is inserted, a composite signal is formed, and the synthesized signal is restored to the format of 528B, and inserted into the second client.
  • the data bit rate of the synthesized signal formed after the signal data is the same as the bit rate of the first client signal data not encoded by 512B/513B, and the subsequent client signal encapsulation and transmitter design is transmitted in the 64B/66B format before the unpackaged The first customer signal data is the same.
  • the encoding used by the second client signal may be 4B/5B encoding
  • the 5B data of the second client signal is encapsulated into the field of 15B
  • the 15B field occupied by the second client signal in addition to the data of 5B, there is 8B Port ID, which is used to identify the port number of the second client signal, or to identify that the second client signal belongs to the first of the multiple second client signals, such that the ODU (Optical Channel Data Unit)
  • the data unit) number + port number can identify the second client signal in the whole network, and the port identifier and the data bit OxFF indicate that there is no second client signal data insertion.
  • the identifier of the second client signal may be inserted, and the identifier may be the port identifier described herein, or may be another identifier, such as the geography of the device to which the second client signal belongs. location information.
  • the field of 15B occupied by the second client signal further includes a BIP-2 byte of 2B for performing BIP-2 check on the data of 15B.
  • the first client signal occupies 513 bits
  • the second client signal occupies 15 bits
  • the 15 bits in the second client signal include the port identification of 8B, the BIP-2 byte of 2B, and the data of 5B.
  • "F" is the head of 512B.
  • the first client signal is encapsulated into a corresponding transmission container by bit compression.
  • the 40GBase-R signal is compressed by 512B/513B encoding and then encapsulated into OPU3 (Optical Channel Payload Unit-3, optical channel payload unit - 3).
  • the bit rate of the data in the first client signal may be compressed by deleting all or part of the bit data in the idle byte or the idle bit in the first client signal, for inserting part or all of the data of the second client signal, that is, by using The data of the second client signal replaces part of the data in the first client signal.
  • the total data bit rate is the same as before the second client signal is compressed, so the transmitter does not need to be changed, the original of the first client signal There is basically no change in the line transmission mode, and it will not affect the transmission of the first customer signal.
  • the calculation of OTN BIP-8, OTN BIP-8 for PCS solution is increased.
  • the scrambled data is calculated, and the calculation of OTN BIP-8 is performed before the 512B/513B encoding after the control block containing the error information is inserted.
  • the first client signal data of 64B/66B is compressed into 512B/513B data, that is, the data of 8*66B (528B) is compressed into 513B.
  • the format corresponding to the idle (Idle) control block in the data block of 513B is as shown in FIG.
  • the FC field identifies whether the control block is the last control block in the 513b data block.
  • the POS field identifies the location of the control block in the eight 66B blocks encoded into blocks 513b.
  • the CB type field uses the 4B code to identify the type of the control block, and the 0B1e control block has the 4B code of 0001.
  • the 56Bit Control Character field stores the block type field in the control block payload.
  • the part of the Idle control block corresponds to the 56B control character of 0x00.
  • the FC, POS, and CB type fields are kept unchanged, and the 56-bit Control Characters field is replaced with an idle ID (Idle ID), and three port identifiers ( Port ID), 3 Data (data) and BIP-2 (2 bits), where the idle ID is 9 bits (9B), each port ID is 10 bits (10B), and each data field is 5 bits (5B).
  • the BIP-2 field occupies 2 bits (2B).
  • the Idle ID is used to indicate that the Idle control block is replaced.
  • the Idle ID is represented by 0x1e; the Port ID is used to indicate the port number or the number of the second client signal (the second client signal may have multiple channels)
  • the ODU number + Port ID can be used to identify the second client signal in the whole network.
  • the Port ID and Data are 0xFF, the data insertion without the second client signal is indicated; the data of the 5B is used to carry the 4B of the second client signal. /5B data; 2B's BIP-2 is used to perform BIP-2 check on 64B data.
  • part of the data in the first client signal replaced by the data of the second client signal is part of the data of the idle control block (since the Idle ID is still used herein as the idle control block).
  • the identifier can also be used to indicate the data in which the second client signal is inserted.
  • the data of the second client signal is replaced by the entire idle control block, but it can still be regarded as part of the data of the first client signal. Therefore, the partial data in the replaced first client signal may be part of the data of the entire first client signal, or may be part of the data of the unit data structure of the first client signal (such as the idle control bit block).
  • the data inserted into the second client signal is encapsulated into a container of the optical transport network, wherein the first client signal may be 100GBase-R, and second The customer signal can be 100Base-X.
  • the 100GBase-R signal is packaged into the OPU4 container.
  • the data is still encapsulated in the OPU4 container, and the encapsulated data does not exceed the first client signal before the second client is inserted. The required bit rate.
  • FIG. 5 is a schematic structural diagram of a transmitting apparatus 500 according to an embodiment of the present invention.
  • the transmitting apparatus 500 can be used to perform one or more steps of the signal transmitting method in FIG. 2.
  • the transmitting device 500 can include a processor (eg, a motherboard) 501, a memory 502, an OTN circuit board 503, a cross board 504, and an OTN tributary board 505.
  • the direction of transmission of the service can be from the client side to the line side.
  • the service sent by the client side is called the customer signal.
  • the processor 501 is connected to the memory 502, the OTN circuit board 503, the cross board 504, and the OTN tributary board 505 via a bus or the like, and is used for control management of the OTN circuit board 503, the cross board 504, and the OTN branch board 505.
  • the tributary board 505 is configured to receive the first client signal and the second client signal from the client side, and the client signal includes multiple service types, such as ATM (Asynchronous Transfer Mode) service, SDH (Synchronous Digital Hierarchy) System) service, Ethernet service, CPRI (Common Public Radio Interface) service, storage service, etc.
  • the OTN tributary board 505, the OTN circuit board 503 interacts with the processor 501, and calls a program in the memory 502 to perform the following operations: compressing the bit rate required for the at least one first client signal transmission, and inserting at least one second client signal. And forming at least one combined signal; or replacing at least one of the at least one first client signal with data of the at least one second client signal to form at least one synthesized signal.
  • the OTN tributary board 505 is used to perform package mapping of client signals (service signals). Specifically, the tributary board 505 maps the composite signal package to an ODU (Optical Channel Data Unit) signal and adds a corresponding OTN management monitoring overhead.
  • the ODU signal may be a low-order ODU signal, such as ODU0, ODU1, ODU2, ODU3, ODUflex, etc., and the OTN management monitoring overhead may be an ODU overhead.
  • Different types of client signals are packaged into different ODU signals in different ways.
  • the cross board 504 is used to complete the cross connection of the tributary board 505 and the circuit board 503 to implement flexible cross scheduling of the ODU signals. Specifically, the cross board 504 can transmit the ODU signal from any one of the tributary boards to any one of the circuit boards, or transfer the OTU signal from any one of the circuit boards to any one of the circuit boards, and can also take the customer signal from any one of the branches. The board is transferred to any of the tributary boards.
  • the OTN board 503 is used to form an OTU signal into an OTU signal and transmit it to the line side.
  • the OTN board 503 can multiplex the low order multiplexed ODU signals into the high order ODU signals before the ODU signals form the OTU signal.
  • the high-order ODU signal adds the corresponding OTN management monitoring overhead to form an OTU signal and transmits it to the optical transmission channel on the line side.
  • the high-order ODU signal signals may be ODU1, ODU2, ODU3, ODU4, etc.
  • the OTN management monitoring overhead may be an OTU overhead.
  • FIG. 6 is a schematic diagram of a signal transmission method at the receiving end.
  • the signal transmission method embodiment of the receiving end of FIG. 6 corresponds to the signal transmission method of the transmitting end of FIG. 2.
  • the corresponding direction of the receiving end corresponds to the optical transmission network, and the optical transmission is performed.
  • the decapsulation in the transport network recovers the client signal, including the following steps:
  • the transmitting device receives the OTN signal, and the OTN signal is encapsulated with a composite signal.
  • Receiving the OTN signal herein may include receiving the optical signal, then converting the optical signal into an electrical signal, and extracting the OTN signal from the electrical signal.
  • the at least one synthesized signal refers to a signal including part or all of the data of the at least one first client signal, and at least one or all of the data of the second client signal, and the form is not limited herein.
  • the signal may be any type of signal, such as an OPU (Optical Channel Payload Unit) signal, or an OTN bearer signal itself; or may not be mapped.
  • replacing the partial data in the at least one first client signal with the data of the at least one second client signal may include: replacing at least one of the first client signals indicating the idle portion with the data of the at least one second client signal data.
  • the partial data in the first client signal replaced by the second client signal may be by deleting the Obtained from a part of the data in the client signal
  • the partially deleted data may be data that does not affect the integrity of the information.
  • part or all of the data of the second client signal may be used to replace part or all of the first client signal ( Idle) code, or part of the bits in the idle code.
  • compressing the bit rate required for the at least one client signal transmission may include: compressing the data of the at least one first client signal to compress a bit rate required for the at least one first client signal transmission .
  • the first client signal can be reduced or removed by transcoding the data block of the first client signal.
  • the data block synchronization header obtains the extra bits to carry the second client signal, and the number of bits occupied by the second client signal data is not more than the number of bits of the first client signal reduced by the transcoding.
  • the identification information identifying the number of ways of the second client signal may be inserted, and the geographical location information of the device may also be inserted.
  • the transmitting device decapsulates the extracted OTN signal and extracts at least one synthesized signal.
  • the extracted signal may be encapsulated by the transport container OPU4 of the optical transport network, and the OPU4 is decapsulated to extract the synthesized signal in the 512B/513B format.
  • the second client signal performs pre-insertion processing before inserting the first client signal, for example, deleting part of the data indicating idle in the second client signal
  • at least one first client signal is separated from the at least one synthesized signal.
  • the at least one second client signal may include: separating data of the at least one second client signal from the at least one synthesized signal, adding part of the data indicating the idle, and forming at least one second client signal.
  • Part or all of the data of the second client signal, and some or all of the data of the first client signal are separated from the composite signal. Corresponding to the case of the transmission direction, this unit is also divided into two cases. Since the operation in the receiving direction corresponds to the sending direction, it is the reverse process of the sending direction operation, so it is briefly described here.
  • the first client signal can be packaged into the corresponding container without bit rate compression.
  • 513B is the 15B client signal
  • the structure of the 15B client signal can be consistent with the description of the transmission direction.
  • the PCS Lane (PCS channel) data corresponding to the first client signal is recovered from the data of 512B/513B, and the PCS Lane data is unscrambled data. Based on the recovered unscrambled PCS Lane data, an OTN BIP-8 check is performed to generate an OTN-8 Error Mask.
  • the partial or total data of the second client signal is recovered from the 15B client signal, and the identity of the second client signal (eg, the port identifier, the geographic location information of the device to which the second client signal belongs) may also be recovered.
  • the first client signal is bit-rate compressed to be packaged into the corresponding OTN container.
  • some or all of the idle (Idle) control block in the first client signal is replaced with all or part of the data of the second client signal.
  • part or all of the data of the second client signal may be extracted according to the feature or identity of the idle control block, ie, the original idle control block that is replaced with part or all of the data of the second client signal. For example, when it is detected that the value of the CB Type field is "0001", and the value of the Idle ID field is "0x1e", it indicates that the control block is a control block that replaces part or all of the data of the second client signal.
  • the 4B/5B data of the second client signal and the identifier of the second client signal corresponding to the data (Port ID) may be extracted from the special control block.
  • the control block format in this case may refer to the data format in the transmission direction embodiment, or may set other types of data formats. After extracting part or all of the data of the second client signal, the second client signal is separated and processed, or directly output.
  • the special idle control block needs to be restored to a normal idle control block for use with other 512B/513B data for 512B/513B decoding.
  • the first client signal replaces the remaining data after the partial data in the first client signal according to the data of the second client signal, for example, the second client signal replaces the partial data indicating the idleness in the first client signal, and is restored to be replaced.
  • the first client signal replaces the remaining data after the partial data in the first client signal according to the data of the second client signal, for example, the second client signal replaces the partial data indicating the idleness in the first client signal, and is restored to be replaced.
  • Part of the data in the first customer signal Specific examples of the partial data of the first client signal can be referred to the previous embodiment.
  • the second customer signal may need to be processed again after separation.
  • all data of the second client signal ie idle in the second client signal, can be directly inserted with the 4B/5B data (Idle The code is also inserted, and the transmitting device at the receiving end can directly output the separated second client signal.
  • the separated second client can be The 4B/5B data buffer of the signal, the data is read and output when there is data in the buffer, and the idle code is inserted when there is no data in the buffer.
  • the at least one second client signal may also be output according to the identifier of the second client signal, for example, outputting the second client signal to the responding client side port according to the second client signal Port ID.
  • the separated first client signal can be subjected to scrambling and AM generation before outputting CAUI (100Gbps Attachment Unit Interface, 100G accessory unit interface) data. Since the data of the CAUI interface is scrambled, the separated first client signal data needs to be scrambled.
  • the AM is updated according to the decoded data of 512/513B, mainly needs to regenerate BIP 3. In order to correctly reflect the BIP error of the entire Ethernet link, the BIP 3 BIP 3 is generated as follows: first based on the decoded and The scrambled data block calculates BIP-8, and then XORs with the PCS BIP-8 error mask, and then XORs with the OTN BIP-8 error mask.
  • Fig. 7 is a view showing a possible structural diagram of a transmitting apparatus involved in the above embodiment, which can implement the signal transmitting method shown in Fig. 2.
  • the transmitting device 700 can include a transmitting unit 701, a processing unit 702, and a receiving unit 703, and the receiving unit 703 is configured to receive at least one first client signal and at least one second client signal.
  • the processing unit 702 is configured to compress a bit rate required for the at least one first client signal transmission, insert at least one data of the second client signal to form at least one synthesized signal, or replace the data with the at least one second client signal Part of the data in the at least one first client signal forms at least one synthesized signal.
  • the sending unit 701 is configured to send the at least one synthesized signal.
  • Processing unit 702 can also package the composite signal into an optical transport network OTN container to form an OTN signal.
  • the sending unit 701 is configured to send the OTN signal.
  • the processing unit 702 may further compress the bit rate required for the at least one first client signal transmission by transcoding the data of the at least one first client signal before inserting the second client signal.
  • the processing unit 702 can also replace, with the data of the at least one second client signal, the partial data indicating the idleness in the at least one first client signal.
  • the processing unit 702 may further delete the partial data indicating the idleness in the at least one second client signal; compress the bit rate required for the at least one first client signal transmission, and insert the at least one channel after deleting the partial data indicating the idleness
  • the data of the two client signals forms at least one synthesized signal; or, the data of the second client signal after the partial data indicating the idle portion is deleted to replace at least one of the data of the first client signal to form at least one synthesized signal.
  • the processing unit 702 may insert at least one of the client data in the second client signal and the identifier of the at least one second client signal into a partial signal of the first client signal to form a composite signal.
  • the processing unit 702 refer to the related description of the embodiment of the corresponding signal transmission method, and details are not described herein.
  • each functional unit in the embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the processing unit 702 can be a processor or a controller, and can be, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific). Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the transmitting unit 701 can be a transmitter
  • the receiving unit 703 can be a receiver.
  • FIG. 8 shows a possible structural diagram of the transmitting apparatus 800 involved in the above embodiment, and the transmitting apparatus 800 can implement the signal transmitting method shown in FIG. 6.
  • the transmitting device 800 includes a transmitting unit 801, a processing unit 802, and a receiving unit 803.
  • Processing unit 802 is for controlling and managing the actions of the transmitting device, for example, processing unit 802 for supporting the transmitting device to perform processes 601-603 in FIG. 6, and/or other processes for the techniques described herein.
  • the receiving unit 804 is configured to receive at least one synthesized signal.
  • the processing unit 802 is configured to separate at least one first client signal and at least one second client signal from the at least one synthesized signal, where the at least one synthesized signal is required to be transmitted by compressing the at least one first client signal a bit rate obtained by inserting data of at least one second client signal; or the at least one synthesized signal is obtained by replacing a portion of the at least one first client signal with data of at least one second client signal of.
  • the sending unit 801 is configured to output the first client signal and the second client signal.
  • the processing unit 802 separating the at least one first client signal and the at least one second client signal from the at least one synthesized signal may include: the processing unit 802 separating the data of the at least one second client signal from the at least one synthesized signal , adding part of the data indicating idle, forming at least one way of the second client signal.
  • the transmitting device 800 may further include a storage unit 803 for storing program codes and data of the transmitting device. For a specific processing manner of the processing unit 802, refer to the related description of the embodiment of the corresponding signal transmission method, and details are not described herein.
  • FIG. 9 shows a possible structural diagram of a transport system involved in the above embodiment, the transport system including a first transport device 901 and a second transport device 902.
  • the first transmitting device 901 is configured to: receive at least one first client signal; compress a bit rate required for the at least one first client signal transmission, and insert at least one second client signal data to form at least one combined signal. Or replacing at least one of the at least one first client signal with the data of the at least one second client signal to form at least one synthesized signal; and transmitting the at least one synthesized signal.
  • the second transmitting device 902 is configured to: receive the at least one synthesized signal, and separate at least one first client signal and at least one second client signal from the at least one synthesized signal, output the first client signal and the Second customer signal.
  • the specific processing manners of the first transmitting device 901 and the second transmitting device 902 can be referred to the related description of the embodiment of the corresponding signal transmitting method, and the related description of the corresponding embodiment of the transmitting device, and details are not described herein.
  • the steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware, or may be implemented by a processor executing software instructions.
  • the software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable Programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a transport network interface device. Of course, the processor and the storage medium can also be present as discrete components in the transport network interface device.
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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  • Time-Division Multiplex Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé de transmission de signal. Le procédé consiste à : recevoir au moins un premier signal de client et au moins un second signal de client ; compresser un débit binaire requis par la transmission du ou des premiers signaux de client et insérer des données du ou des seconds signaux de client, ou utiliser les données du ou des seconds signaux de client pour remplacer des données partielles dans le ou les premiers signaux de client, afin de former au moins un signal synthétisé ; et transmettre le ou les signaux synthétisés. Les modes de réalisation de la présente invention concernent en outre un dispositif de transmission de signal et un système de transmission de signal correspondants. Les modes de réalisation de la présente invention réalisent la transmission du second signal de client sans affecter la transmission du premier signal de client, améliorant ainsi l'efficacité de transmission et économisant également la ressource de transmission.
PCT/CN2017/115253 2016-12-30 2017-12-08 Procédé, dispositif et système de transmission de signal WO2018121223A1 (fr)

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US20100177785A1 (en) * 2006-09-22 2010-07-15 Nippon Telegraph And Telephone Corporation Multiplexing transmission system and multiplexing transmission method

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US20100177785A1 (en) * 2006-09-22 2010-07-15 Nippon Telegraph And Telephone Corporation Multiplexing transmission system and multiplexing transmission method
CN101330350A (zh) * 2007-06-21 2008-12-24 华为技术有限公司 适配载荷带宽传输数据的发送方法、接收处理方法及装置
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