CN108270512B

CN108270512B - Signal transmission method, device and system

Info

Publication number: CN108270512B
Application number: CN201611263811.6A
Authority: CN
Inventors: 操时宜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2021-10-26
Anticipated expiration: 2036-12-30
Also published as: WO2018121223A1; CN108270512A

Abstract

An embodiment of the present invention provides a signal transmission method, including: receiving at least one first client signal and at least one second client signal; compressing the bit rate required for transmission of at least one first client signal, inserting at least one second client signal data, or replace part of the data in the at least one first client signal with data of at least one second client signal to form at least one synthetic signal; and send at least one synthetic signal. Embodiments of the present invention also provide a corresponding signal transmission device and transmission system. The embodiment of the present invention realizes the transmission of the second client signal without affecting the transmission of the first client signal, improves the transmission efficiency, and saves transmission resources.

Description

Signal transmission method, device and system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for signal transmission.

Background

With the rapid increase of network traffic, the bit rate corresponding to a single wavelength or a single channel in the optical transmission network is now increasing, for example, the bit rate of a single wavelength is gradually upgraded from 10Gb/s (gigabytes per second) to 100 Gb/s. There are relatively slow-rate services in the network, and the market space for these services is still very large. For example, the bit rate of ZigBee (Zigbee protocol) is in hundreds of kb/s (kb/s), and WiFi is in hundreds of Mb/s (Mb/s). ZigBee is used for the Internet of things, WiFi (Wireless Fidelity) can be used for broadband access, and the market spaces of the Internet of things and the broadband access are very large. This type of service also has the characteristic of being substantially less sensitive to delay. It is a problem how to carry these relatively low rate, less delay sensitive traffic in high speed optical transport networks.

On the other hand, with the rise of services such as VR/AR (Virtual Reality/Augmented Reality), internet of things, etc., the diversification of the transmission performance requirements of the services of the network is more obvious. For example, the packet loss rate and the delay of the VR/AR are higher than those of general services, and most of the services of the internet of things require less high packet loss rate and delay than those of general services. However, in the existing network architecture, the transmission performance of different services in the optical transport network is the same, and how to more effectively carry services with different transmission performance requirements in the optical transport network is also a problem.

Disclosure of Invention

The embodiment of the invention provides a signal transmission method, a device and a system, which are used for transmitting services with different transmission performance requirements.

In a first aspect, a signal transmission method is provided, including: receiving at least one first customer signal and at least one second customer signal;

compressing the bit rate required for transmitting the at least one first client signal, and inserting the data of the at least one second client signal to form at least one composite signal; and sending the at least one path of synthesized signal.

With reference to the first aspect, in a possible implementation manner, the sending the at least one synthesized signal includes: and packaging the at least one path of synthesized signal into an Optical Transport Network (OTN) container to form at least one path of OTN signal, and sending the at least one path of OTN signal.

With reference to the first aspect, in a possible implementation manner, the compressing a bit rate required for the at least one first client signal transmission includes: compressing the bit rate required for transmission of said at least one first client signal by transcoding data of said at least one first client signal.

With reference to the first aspect, in a possible implementation manner, the compressing a bit rate required for transmitting at least one first client signal, and inserting data of at least one second client signal to form at least one composite signal includes: deleting the partial data which indicates the vacancy in the at least one path of second client signal; compressing the bit rate required for the transmission of said at least one first client signal, inserting at least one second client signal data after deletion of the portion of data indicating idleness, to form at least one composite signal.

With reference to the first aspect, in a possible implementation manner, the compressing a bit rate required for transmitting the at least one first client signal, and inserting the at least one second client signal to form the at least one composite signal includes: compressing the bit rate required for transmission of said at least one first client signal, inserting the client data in said at least one second client signal and the identification of said at least one second client signal to form at least one composite signal.

In a second aspect, a signal transmission method is provided, including: receiving at least one first customer signal and at least one second customer signal; replacing part of the data in the at least one first customer signal with data of at least one second customer signal to form at least one composite signal; and sending the at least one path of synthesized signal.

With reference to the second aspect, in a possible implementation manner, the sending the at least one synthesized signal includes: and packaging the at least one path of synthesized signal into an Optical Transport Network (OTN) container to form at least one path of OTN signal, and sending the at least one path of OTN signal.

With reference to the second aspect, in a possible implementation manner, the replacing a part of data in the at least one first client signal with at least one piece of data of the second client signal includes: the portion of the data in the at least one first client signal that indicates free is replaced with the data in the at least one second client signal.

With reference to the second aspect, in a possible implementation manner, the replacing a part of data in the at least one first customer signal with at least one second customer signal to form at least one composite signal includes: deleting the partial data which indicates the vacancy in the at least one path of second client signal; at least one path of composite signal is formed by replacing part of the data in the first client signal with at least one path of data of the second client signal after deleting the part of the data indicating the vacancy.

With reference to the second aspect, in a possible implementation manner, the replacing a part of data in the at least one first customer signal with at least one second customer signal to form at least one composite signal includes: at least one composite signal is formed by replacing part of the data in at least one first customer signal with customer data of at least one second customer signal and an identification of the at least one second customer signal.

In a third aspect, a signal transmission method is provided, including: receiving at least one composite signal, and separating at least one first customer signal and at least one second customer signal from the at least one composite signal; wherein the at least one composite signal is obtained by compressing the bit rate required for transmission of the at least one first client signal and inserting data of at least one second client signal; or the at least one composite signal is obtained by replacing part of the data in the at least one first client signal with data from at least one second client signal; and outputting the at least one first customer signal and the at least one second customer signal.

In a fourth aspect, there is provided a signal transmission device, comprising: the system comprises a receiving unit, a processing unit and a sending unit, wherein the receiving unit is used for receiving at least one path of first client signal and at least one path of second client signal; the processing unit is configured to: compressing the bit rate required for transmitting the at least one first client signal, and inserting the data of the at least one second client signal to form at least one composite signal; or, replacing part of the data in the at least one first customer signal with the data in the at least one second customer signal to form at least one composite signal; the sending unit is configured to send the at least one synthesized signal.

With reference to the fourth aspect, in a possible implementation manner, the sending, by the sending unit, the at least one synthesized signal includes: and the sending unit packages the at least one path of synthesized signal into an Optical Transport Network (OTN) container to form at least one path of OTN signal and sends the at least one path of OTN signal.

With reference to the fourth aspect, in a possible implementation manner, the processing unit is configured to compress a bit rate required for transmission of the at least one first client signal by transcoding data of the at least one first client signal.

With reference to the fourth aspect, in a possible implementation manner, the processing unit is configured to replace a part of data indicating idle in at least one first client signal with at least one second client signal.

With reference to the fourth aspect, in a possible implementation manner, the processing unit is configured to: deleting the partial data which indicates the vacancy in the at least one path of second client signal; compressing the bit rate required for transmitting the at least one first client signal, inserting at least one path of data of a second client signal after deleting the partial data indicating the vacancy, and forming at least one path of composite signal; or, at least one path of composite signal is formed by replacing part of data in the first client signal with at least one path of data of the second client signal after deleting the part of data indicating the vacancy.

With reference to the fourth aspect, in a possible implementation manner, the inserting, by the processing unit, at least one path of the second client signal in a part of bits of the first client signal to form a composite signal includes: the processing unit inserts the customer data of at least one second customer signal and the identification of the at least one second customer signal in part of the bits of the first customer signal to form a composite signal

In a fifth aspect, there is provided a signal transmission device comprising: the receiving unit is used for receiving at least one path of synthesized signal; the processing unit is configured to separate at least one first client signal and at least one second client signal from the at least one composite signal, where the at least one composite signal is obtained by compressing a bit rate required for transmission of the at least one first client signal and inserting data of the at least one second client signal; or the at least one composite signal is obtained by replacing part of the data in the at least one first client signal with data from at least one second client signal; the transmitting unit is used for outputting the first client signal and the second client signal.

With reference to the fifth aspect, in a possible implementation manner, the separating, by the processing unit, at least one first client signal and at least one second client signal from the at least one composite signal includes: the processing unit separates at least one path of data of the second client signal from the at least one path of synthesized signal, and adds partial data indicating idle to form at least one path of second client signal.

In a sixth aspect, there is provided a conveyor system comprising the conveyor of the fourth aspect and the conveyor of the fifth aspect.

In the signal transmission scheme provided in the embodiment of the present invention, by compressing the bit rate required for transmitting the first client signal, at least one path of data of the second client signal is inserted to form at least one path of composite signal, or at least one path of data of the second client signal is used to replace part of data in the at least one path of first client signal to form at least one path of composite signal, so that transmission of the second client signal is realized without affecting transmission of the first client signal, transmission efficiency is improved, and transmission resources are saved.

Drawings

Fig. 1 is a schematic diagram of a network structure of low-rate services provided by an embodiment of the present invention when the low-rate services are transmitted through a network;

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 diagram illustrating a format of an idle control block provided by an entity of the present invention;

FIG. 5 is a schematic structural diagram of a conveying apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of another signaling method provided by an embodiment of the invention;

FIG. 7 is a schematic structural diagram of another conveying apparatus provided in the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another conveying apparatus provided in the embodiment of the present invention;

fig. 9 is a schematic structural diagram of a transmission system according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a network structure of a low-rate service during network transmission, and taking a ZigBee service as an example, the ZigBee service needs to be transmitted to an optical transport network for transmission through layer-by-layer convergence. For example, the rate of the ZigBee signal is 250Kb/s, at the ZigBee central node, n paths of ZigBee signals are firstly converged into 10/100M Ethernet traffic, then at the access switch/router, 10/100M Ethernet traffic is converged into GE (1Gb/s Ethernet) traffic, then at the convergence switch/router, the GE traffic is converged into 10GE (10Gbps Ethernet) traffic, and when sending the traffic to the Optical Transport access device, 10GE is encapsulated into OTU2(Optical channel Transport Unit-2, Optical channel data Unit-2, with a bit rate of about 10 Gb/s) traffic, and then sent to the Optical Transport convergence device, and several OTUs 2 are converged into OTUs 4(Optical channel t-4, Optical channel data Unit-4, with a bit rate of about 100 Gb/s) traffic. The OTU4 service is further processed by the optical transmission convergence device, the optical transmission access device, the convergence switch/router device, and the ZigBee centralized meter reading center, which is equivalent to the above-mentioned reverse process, i.e. the ZigBee service is extracted layer by layer from the OTU4 service, and is not described again. VR/AR services can be accessed at the aggregation switch/router because of the higher bit rate. In fig. 1, VR/AR and ZigBee services are processed at different aggregation switches/routers and then accessed to the same optical transport access device. After the optical transmission access device packages the data corresponding to the VR/AR service and the ZigBee service to the OTU2 container, the data corresponding to different services are not distinguished in the optical transmission network, and the data corresponding to all the services are transparently transmitted, so as to ensure bandwidth and time delay.

For low rate services like ZigBee: firstly, the transmission cost is too high, and the transmission cost needs to be subjected to multiple convergence/distribution processing; secondly, for the optical transport network, since the rate of such services is too low relative to the transport pipe rate of the optical transport network, and access to such services is not generally directly supported, the operator or equipment manufacturer of the optical transport network cannot obtain direct economic benefits from the transmission of such services. For the case of different types of traffic mix: data corresponding to different types of services are not distinguished in an optical transport network, and very high transport performance is guaranteed, so that the efficiency and the bandwidth utilization rate of the transport network are not high enough.

Since the current optical transport network is mainly ethernet service, the ethernet service is characterized by burstiness, that is, the substantial bit rate (bit rate of data carrying useful information) of the ethernet service is not fixed, and the bit rate corresponding to the transport channel in the optical transport network is basically fixed. In addition, some characteristic bits, such as a data block synchronization header, also exist in the data format of the ethernet network, and the bandwidth occupied by these characteristic bits may also be compressed through some processing.

In an optical transport network, at the entrance of an ethernet signal encapsulated into a transport container (generally, an OTN container, other types of containers can be similarly processed, and the definition of the OTN container is referred to in ITU-T g.709 standard), data which does not affect the integrity of information in the ethernet signal is deleted or compressed, data which does not affect the integrity of information in the ethernet signal is inserted, data which does not affect the integrity of information in the ethernet signal is extracted from the exit of the ethernet signal which is extracted from the transport container, and the data which does not affect the integrity of information in the ethernet signal is re-inserted or recovered. Therefore, data insertion and extraction of low-rate signals or signals with lower transmission performance requirements have no influence on transmission of Ethernet signals, and performances such as clock, bit error rate and the like are basically kept unchanged. For the transmission of low-rate signals or signals with lower transmission performance requirements, the transmission cost is basically zero (the total transmission cost is basically the same as the cost of separately transmitting Ethernet signals which are originally transmitted). The existing transmission channel is divided into two parts, one part is ethernet transmission with a variable substantial bit rate (which can be expanded to high priority service), the other part is the fixed bit rate minus the residual part of the ethernet substantial bit rate, and the residual part is used for transmitting low-rate signals or signals with lower transmission performance requirements (which can be expanded to low priority service), and the method is also equivalent to adding a new transmission plane in the optical transmission network.

Fig. 2 is a flowchart of a signal transmission method according to an embodiment of the present invention, referring to fig. 2, the detailed flow of the method includes:

s201, receiving at least one path of first customer signal and at least one path of second customer signal;

here, the at least one first client signal received by the transmitting apparatus may include x first client signals, where x is a positive integer, that is, the first client signal-1 to the first client signal-x, and for example, includes two signals, i.e., a first client signal-1 and a first client signal-2, and the first client signal may correspond to a high priority service or may be a main service of an optical transport network.

S202, compressing the bit rate required by the transmission of the at least one path of first customer signals, and inserting the data of the at least one path of second customer signals to form at least one path of composite signals; or replacing part of the data in the at least one first customer signal with the data in the at least one second customer signal to form at least one composite signal;

the second client signal inserted by the transmitting means in the first client signal may comprise y second client signals, i.e. second client signal-1 to second client signal-y, for example comprising two signals, second client signal-1 and second client signal-2, and the second client signal may correspond to low priority traffic, for example low rate or traffic with lower transmission performance requirements.

Compressing the bit rate required for the at least one first customer signaling may comprise: the bit rate required for transmission of the at least one first client signal is compressed by transcoding data of the at least one first client signal.

Here, the partial bits of the first client signal may be obtained by compressing a partial data in said first client signal, which may be data that does not affect the integrity of the information. The redundant bits can be obtained by transcoding the data blocks of the first client signal and reducing or removing the data block synchronization header of the first client signal to carry the second client signal, and the number of bits occupied by inserting the data of the second client signal does not exceed the number of bits of the first client signal reduced by transcoding.

Here, the step S202 compresses the bit rate required for transmitting the at least one first client signal, and inserts the data of the at least one second client signal, only one way of inserting the second client signal into the first client signal to form a combined signal, and optionally, may also form the at least one combined signal by replacing part of the data in the at least one first client signal with the data of the at least one second client signal. In this case, part of the data indicating free in the at least one first client signal may be replaced by part or all of the data in the at least one second client signal, for example, part or all of a free (Idle) code or a free (Idle) control block in the first client signal may be replaced.

In the embodiment of the present invention, part of data in at least one first client signal may be replaced with at least one piece of client data of a second client signal and an identifier of the at least one second client signal to form at least one composite signal, that is, after the at least one piece of client data of the second client signal is inserted, at least one piece of identifier of the second client signal may be inserted, for example, identifier information for identifying the number of paths of the second client signal may be inserted, and geographic location information of the device may also be inserted.

And S203, sending the at least one path of synthesized signal.

The sending the at least one synthesized signal may include: and packaging the at least one path of synthesized signal into an Optical Transport Network (OTN) container to form at least one path of OTN signal, and sending the at least one path of OTN signal.

The transport apparatus may map and encapsulate the composite signal to an OTN bearer signal (e.g., ODU), add the OTU overhead byte and the FA overhead byte to form an OTU signal (e.g., OTU), and then send the OTU signal.

The at least one composite signal refers to a signal including part or all of the data of the at least one first client signal and part or all of the data of the at least one second client signal, and the form thereof is not limited herein. Alternatively, the signal may be any form of signal in the process of mapping and encapsulating the signal to an OTN bearer signal, for example, an OPU (Optical channel Payload Unit) signal; or the OTN carrying signal itself; but also signals that do not need to be mapped, encapsulated, or transmitted to OTN-bearing signals, such as ethernet signals; and may even be electrical signals connected internally or between chips, etc.

In step S201, the signal transmission method according to the embodiment of the present invention may further include a step of preprocessing the first client signal. Taking the example of a 100GBASE-R client signal, the pre-processing includes synchronization of blocks of bits, 66B blocks (66bits blocks) with a 2-bit (bit) synchronization header, 01 for data blocks, 10 for control blocks, the synchronization header not being scrambled. One way of bit block synchronization is to detect 01 or 10 at every 66-bit fixed position, where the fixed position is the position of the synchronization header, i.e., the position where the 66B block starts, and find the position of the synchronization header, so that the 66B blocks in different columns can be aligned according to the position of the synchronization header, thereby implementing bit block synchronization. Preprocessing may also include AM (Alignment Marker) locking. The preprocessing can also include computation of a PCS BIP-8error Mask (Physical Coding sub-layer Bit Interleaved Parity-8error Mask), and assuming that an input Interface of 100GBASE-R is an additional Interface Unit (CAUI, 100Gb/s Attachment Unit Interface), because the additional Interface Unit processes scrambled data, and subsequent processing needs descrambling and inserting data of a second client signal, BIP transparency of the first client signal is damaged, BIP-8 processing is needed, and the computation of the BIP error Mask is completed. Since the data of the additional interface unit is scrambled, the pre-processing may also include decoding.

Before inserting at least one second client signal in step S202, the second client signal may be further subjected to pre-insertion processing, where the pre-insertion processing includes deleting a part of data indicating idleness in the second client signal, and at this time, after compressing the bit rate required for transmitting the at least one first client signal, the second client signal is inserted with at least one piece of data after deleting the part of data indicating idleness. The second client signal input may be 4B/5B data. If the bandwidth corresponding to the data that can be inserted after the original data in the first client signal is processed is large enough, the 4B/5B data can be directly inserted, that is, all the data in the second client signal can be inserted. If the bandwidth corresponding to the data that can be inserted after the original data in the first client signal is processed is not large enough, the idle code in the 4B/5B data of the second client signal can be deleted, that is, the part of data indicating idle in the second client signal is deleted, and then the second client signal with the idle code deleted is inserted into the first client signal. That is, in this embodiment, the data inserted into the at least one path of the 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 idle codes deleted.

The manner of inserting the second client signal in the first client signal in step S202 may be various. In one case, the first customer signal may be encapsulated into a corresponding transport container, e.g., a 100GBase-R signal may be encapsulated into OPU4(Optical Channel Payload Unit-4). In this case, the bit rate of the data of the first client signal may be compressed using a 512B/513B encoding scheme for inserting all or part of the data of the second client signal. Therefore, after all or part of the data of the second client signal is inserted into the data of the first client signal, the total data bit rate is not increased, the transmitter does not need to be changed, the original line transmission mode of the first client signal is basically not changed, and the transmission of the first client signal is not influenced.

In one case, the data format of the first client signal is 64B/66B, and after 8 pieces of data of 66B are compressed into 513B, the data of the second client signal may be encoded into a format of 5B/15B and inserted into the data of 513B encoded by the first client model. The first client signal is 512B/513B encoded and 528B compressed to 513B with a reduced bit rate, the composite signal is formed after the data of the second client signal inserted at 15B, the composite signal is restored to 528B format, the data bit rate of the composite signal formed after the data of the second client signal is inserted is the same as the bit rate of the first client signal data without 512B/513B encoding, and the subsequent client signal encapsulation and transmitter are designed as the first client signal data in 64B/66B format before being transmitted without encapsulation. Here, the coding adopted by the second client signal may be 4B/5B coding, the 5B Data of the second client signal is encapsulated into the field of 15B, and in the 15B field occupied by the second client signal, in addition to the 5B Data, there is a Port identification (Port ID) of 8B for identifying the Port number of the second client signal, or for identifying that the second client signal belongs to the several paths of the multiple second client signals, so that the ODU (Optical Channel Data Unit) number + Port number may identify the second client signal in the whole network, and the Port identification and Data bit OxFF indicate that no Data of the second client signal is inserted. I.e. in addition to the client data inserted in the second client signal, an identification of the second client signal may be inserted, which may be the port identification as described herein, or other identifications, such as geographical location information of the device to which the second client signal belongs. The field of 15B occupied by the second client signal also includes the BIP-2 byte of 2B for performing a BIP-2 check on the data of 15B. As shown in fig. 3, the first client signal occupies 513bits, the second client signal occupies 15bits, and the 15bits in the second client signal include the port identification of 8B, the BIP-2 byte of 2B, and the data of 5B. Where "F" is the head of 512B.

In another case, the first client signal is bit-compressed and encapsulated into a corresponding transport container, for example, the 40GBase-R signal is 512B/513B encoded and compressed and then encapsulated into OPU3(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 free bytes or free bits of the data in the first client signal for inserting part or all of the data in the second client signal, i.e. by replacing part of the data in the first client signal with the data in the second client signal. After inserting all or part of the data of the second client signal into the data of the first client signal, the total data bit rate is the same as that before compressing the second client signal, so the transmitter does not need to be changed, the original line transmission mode of the first client signal is basically not changed, and the transmission of the first client signal is not influenced. In this case, in order to correctly reflect the bit error information of the second client service passing through the OTN domain and the entire transmission process of the second client signal, OTN BIP-8 is calculated, the OTN BIP-8 calculates for the data after PCS descrambling, and the calculation of OTN BIP-8 is performed after the control block containing error information is inserted and before 512B/513B encoding. In addition, in this case, the first client signal data of 64B/66B is compressed into 512B/513B data, i.e., 8 × 66B (528B) data is compressed into 513B. The format of the free (Idle) control block in the data block 513B is as shown in fig. 4. In fig. 4, 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 8 66B blocks encoded as 513B blocks. The CB type field identifies the type of control block using 4B coding, and the 4B coding of the control block of 0x1e is 0001. The 56Bit Control Character Field stores the part of the Control Block payload with the Block Type Field removed, and the 56B Control Character corresponding to the Idle (Idle) Control Block is 0x 00. When the second customer service replaces the Idle bytes occupied by the first customer service, the FC, POS and CB type fields are kept still, the 56-bit Control Characters field is replaced by an Idle identification (Idle ID), 3 Port identifications (Port ID), 3 Data and a BIP-2(2bits), wherein the Idle identification occupies 9bits (9B), each Port identification occupies 10bits (10B), each Data field occupies 5bits (5B), and the BIP-2 field occupies 2bits (2B). The Idle ID is used to indicate that the Idle control block is replaced, and the Idle ID is represented by 0x1e in this embodiment; the Port ID is used for representing the Port number or the channel number of the second client signal (the second client signal may have multiple channels), so that the ODU number + the Port ID can be used for identifying the second client signal in the whole network, and when the Port ID and the Data are 0xFF, the Data insertion of the second client signal is not shown; 5B Data is used to carry 4B/5B Data of the second client signal; BIP-2 of 2B is used to perform a BIP-2 check on the 64B data. In this example, the part of the data in the first guest signal that is replaced by the data of the second guest signal is part of the free control block (since here the free control block is still indicated by the Idle ID). Of course, the data of the second client signal may also be indicated by the flag, in which case the data of the second client signal replaces the entire free control block, but it can be considered as part of the data of the first client signal. Therefore, the replaced partial data in the first client signal may be a part of the data of the entire first client signal, or may be a part of the data in a unit data structure (e.g., a free control bit block) of the first client signal.

After inserting part or all of the data of the second client signal into the first client signal, the data after inserting the second client signal is packaged into a container of an optical transport network, wherein the first client signal can be 100GBase-R, and the second client signal can be 100 Base-X. In the prior art, the 100GBase-R signal is packaged into the OPU4 container. In this embodiment, after some or all of the data of the second client signal is inserted into the first client signal, the data is still encapsulated in the OPU4 container, and the encapsulated data does not exceed the bit rate required for the first client signal before the second client signal is inserted.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a transmitting device 500 according to an embodiment of the present invention, where the transmitting device 500 may be used to execute one or more steps of the signal transmitting method in fig. 2. The transmission device 500 may include a processor (e.g., motherboard) 501, a memory 502, an OTN board 503, a cross board 504, and an OTN board 505. The traffic may travel in the direction from the client side to the line side. The traffic sent by the client side is called a client signal.

The processor 501 is connected to the memory 502, the OTN circuit board 503, the cross board 504, and the OTN circuit board 505 through a bus or directly, and is used for controlling and managing the OTN circuit board 503, the cross board 504, and the OTN circuit board 505.

The tributary board 505 is configured to receive a first client signal and a second client signal from a client side, and the client signal includes a plurality of service types, such as ATM (Asynchronous Transfer Mode) service, SDH (Synchronous Digital Hierarchy) service, ethernet service, CPRI (Common Public Radio Interface) service, storage service, and the like. The OTN branch board 505 and the OTN board 503 interact with the processor 501, call the program in the memory 502, and perform the following operations: compressing the bit rate required for transmitting the at least one first client signal, and inserting the data of the at least one second client signal to form at least one composite signal; or, replacing part of the data in the at least one first customer signal with the data in the at least one second customer signal to form at least one composite signal.

The OTN tributary board 505 is used to complete the encapsulation mapping of the client signals (traffic signals). Specifically, the tributary board 505 encapsulates and maps the synthesized signal to an ODU (Optical Channel Data Unit) signal and adds a corresponding OTN management monitoring overhead. On the OTN branch circuit board 505, the ODU signal may be a low-order ODU signal, such as ODU0, ODU1, ODU2, ODU3, ODUflex, and the like, and the OTN management monitoring overhead may be an ODU overhead. And for different types of client signals, different manners are adopted for encapsulation and mapping into different ODU signals.

The cross board 504 is used to complete cross connection between the branch board 505 and the board 503, and flexible cross scheduling of ODU signals is achieved. Specifically, the cross board 504 may implement transmission of an ODU signal from any one of the branch circuit boards to any one of the circuit boards, or transmission of an OTU signal from any one of the circuit boards to any one of the circuit boards, and may also implement transmission of a client signal from any one of the branch circuit boards to any one of the branch circuit boards.

The OTN board 503 is configured to form the ODU signal into an OTU signal and send the OTU signal to the line side. Before the ODU signal is formed into an OTU signal, the OTN line board 503 may multiplex the lower-order multiplexed ODU signal into the higher-order ODU signal. And then adding corresponding OTN management monitoring overhead to the higher-order ODU signal to form an OTU signal and sending the OTU signal to an optical transmission channel at the line side. On the OTN circuit board 503, the higher-order ODU signal may be an ODU1, an ODU2, an ODU3, an ODU4, and the like, and the OTN management monitoring overhead may be OTU overhead.

Fig. 6 is a schematic diagram of a signal transmission method of a receiving end, an embodiment of the signal transmission method of the receiving end of fig. 6 corresponds to the signal transmission method of the transmitting end of fig. 2, and a direction corresponding to the receiving end of the embodiment of the present invention is correspondingly transmitted through an optical transport network, and then a client signal is recovered by decapsulating from the optical transport network, including the following steps:

s601, receiving at least one path of synthesized signal;

here, the transmitting device receives an OTN signal in which the composite signal is encapsulated. 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.

S602, separating at least one first customer signal and at least one second customer signal from the at least one composite signal, where the at least one composite signal is obtained by compressing a bit rate required for transmitting the at least one first customer signal and inserting data of the at least one second customer signal; or the at least one composite signal is obtained by replacing part of the data in the at least one first client signal with data from at least one second client signal;

here, 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 part or all of the data of the at least one second client signal, and the form thereof is not limited herein. Alternatively, the signal may be any form of signal in the process of mapping and encapsulating the signal to an OTN bearer signal, for example, an OPU (Optical channel Payload Unit) signal; or the OTN carrying signal itself; but also signals that do not need to be mapped, encapsulated, or transmitted to OTN-bearing signals, such as ethernet signals; and may even be electrical signals connected internally or between chips, etc.

Here, replacing part of the data in the at least one first client signal with the data in the at least one second client signal may include: the portion of the data in the at least one first client signal that indicates free is replaced with the data in the at least one second client signal.

In case the composite signal is obtained by replacing part of the data in said first client signal with data of the second client signal, the part of the data in the first client signal that is replaced by the second client signal may be obtained by deleting part of the data in said first client signal, which may be data that does not affect the integrity of the information, e.g. part or all of the Idle (Idle) code of the first client signal, or part of the bits in the Idle code, may be replaced by part or all of the data of the second client signal.

Here, compressing the bit rate required for the at least one customer signaling may include: compressing the bit rate required for transmission of said at least one first client signal by transcoding data of said at least one first client signal.

In the case of obtaining a composite signal by compressing the bit rate required for transmission of the first client signal and inserting data of the second client signal, the excess bits to carry the second client signal can be obtained by transcoding the data blocks of the first client signal and reducing or removing the data block synchronization header of the first client signal, and the number of bits occupied by inserting data of the second client signal does not exceed the number of bits of the first client signal reduced by transcoding. After inserting the data of the second client signal, identification information identifying the number of paths of the second client signal may be inserted, and geographical location information of the device may also be inserted.

And the transmission device decapsulates the extracted OTN signal and extracts at least one path of synthesized signal. In this embodiment, the extracted signal may be encapsulated by the transport container OPU4 of the optical transport network, and the OPU4 may be decapsulated to extract a composite signal in 512B/513B format.

If the second client signal is processed before the first client signal is inserted, for example, part of data indicating idle in the second client signal is deleted, the separating the at least one first client signal and the at least one second client signal from the at least one composite signal may include: and separating at least one path of data of the second client signal from the at least one path of synthesized signal, and adding partial data indicating idle to form at least one path of second client signal.

Part or all of the data of the second client signal and part or all of the data of the first client signal are separated from the composite signal. This unit is also divided into two cases, corresponding to the case of the transmission direction. Since the operation in the receiving direction corresponds to the transmitting direction and is the reverse process of the operation in the transmitting direction, it is described briefly here.

The first case is that the first client signal can be encapsulated into a corresponding container without bit rate compression. In this case, every 513B is followed by a 15B client signal, the structure of the 15B client signal may be identical to that described by the transmission direction. PCS Lane (PCS channel) data corresponding to the first client signal is recovered from the 512B/513B data, and the PCS Lane data is not scrambled data. And performing OTN BIP-8 verification according to the recovered unscrambled PCS Lane data to generate an OTN-8Error Mask. Some or all of the data of the second client signal is recovered from the client signal of 15B, and an identification of the second client signal (e.g., a port identification, geographical location information of a device to which the second client signal belongs) may also be recovered.

The second case is that the first client signal undergoes bit rate compression before being encapsulated into a corresponding OTN container. In this case, part or all of the Idle (Idle) control blocks in the first client signal may be replaced with all or part of the data in the second client signal. In the receiving direction, part or all of the data of the second client signal may be extracted based on the characteristics or identification of the free control block, i.e. the original free control block, which is replaced by part or all of the data of the second client signal. For example, when detecting that the value of the CB Type field is "0001" and the value of the Idle ID field therein is "0 x1 e", it indicates that the control block is a control block that is replaced with part or all of the data of the second client signal, which may be referred to herein as a special control block, and the 4B/5B data of the second client signal and the identification (Port ID) of the second client signal corresponding to the data can be extracted from the special control block according to the corresponding control block format. The control block format in this case may refer to the data format in the transmitting direction embodiment, and other types of data formats may be set. And after extracting part or all data of the second client signal, performing separation post-processing on the second client signal, or directly outputting the second client signal. On the other hand, the special idle control block needs to be restored to a general idle control block, along with other 512B/513B data for 512B/513B decoding. That is, the first client signal replaces the data left 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 vacancy in the first client signal, and the replaced partial data in the first client signal is recovered. Specific examples of the partial data of the first client signal may refer to the previous embodiments.

S603, outputting the at least one first customer signal and the at least one second customer signal.

The second client signal may need to be processed again after separation. On the one hand, if the bandwidth available for the second client signal to be inserted into the first client signal in the transmission direction is large enough, all data of the second client signal can be directly inserted with 4B/5B data, i.e. Idle (Idle) codes in the second client signal will also be inserted, and the transmitting device at the receiving end can directly output the separated second client signal. On the other hand, if the bandwidth available for inserting the second client signal into the first client signal in the transmission direction is not large enough, and the idle code in the 4B/5B needs to be deleted and then the first client signal is inserted, the separated 4B/5B data of the second client signal can be buffered, the data is read and output when the data exists in the buffer, and the idle code is inserted when the data does not exist in the buffer. In addition, the at least one second client signal may be output according to the identification of the second client signal, for example, according to the second client signal Port ID, and the second client signal may be output to the responding client-side Port.

The separated first client signal may be scrambled and AM-generated and then output data of a CAUI (100Gbps Attachment Unit Interface, 100G Attachment Unit Interface). Since the data of the CAUI interface is scrambled, it is necessary to scramble the separated first client signal data. Updating AM according to 512/513B decoded data, mainly needing to regenerate BIP₃In order to correctly reflect the BIP error condition of the whole ethernet link,

the generation method is as follows: BIP-8 is first calculated based on the decoded and scrambled data block, then XOR'd with the PCS BIP-8error mask, and then XOR'd with the OTN BIP-8error mask.

Fig. 7 shows a schematic diagram of a possible structure of the transmitting device according to the above embodiment, which can implement the signal transmission method shown in fig. 2. The transmitting device 700 may comprise a sending unit 701, a processing unit 702 and a receiving unit 703, wherein 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 transmitting the at least one first client signal, and insert data of the at least one second client signal into the at least one first client signal to form at least one composite signal; or, replacing part of the data in the at least one first customer signal with the data in the at least one second customer signal to form at least one composite signal. The sending unit 701 is configured to send the at least one synthesized signal. The processing unit 702 may further encapsulate the composite signal into an OTN container of an optical transport network 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 transmission of the at least one first client signal by transcoding data of the at least one first client signal before inserting the second client signal. The processing unit 702 may also replace the portion of the data in the at least one first client signal that indicates idle with the data in the at least one second client signal. The processing unit 702 may further delete a portion of data indicating idle in the at least one second client signal; compressing the bit rate required for transmitting the at least one first client signal, inserting at least one path of data of a second client signal after deleting the partial data indicating the vacancy, and forming at least one path of composite signal; or, at least one path of composite signal is formed by replacing part of data in the first client signal with at least one path of data of the second client signal after deleting the part of data indicating the vacancy. The processing unit 702 may insert the client data of the at least one second client signal and the identification of the at least one second client signal in the partial bits of the first client signal to form the composite signal when forming the composite signal. The specific processing manner of the processing unit 702 may refer to the related description of the corresponding signal transmission method, and is not described again.

It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation. Each functional unit in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The Processing Unit 702 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The transmitting unit 701 may be a transmitter and the receiving unit 703 may be a receiver.

Fig. 8 shows a schematic diagram of a possible structure of the transmitting apparatus 800 according to the above embodiment, and the transmitting apparatus 800 can implement the signal transmission method shown in fig. 6. The transmitting apparatus 800 includes a transmitting unit 801, a processing unit 802, and a receiving unit 803. The processing unit 802 is used to control and manage the actions of the transmitting device, for example, the processing unit 802 is used to support the transmitting device to perform the process 601 and 603 in fig. 6, and/or other processes for the techniques described herein.

A receiving unit 804, 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 composite signal, where the at least one composite signal is obtained by compressing a bit rate required for transmitting the at least one first client signal and inserting data of the at least one second client signal; or the at least one composite signal is obtained by replacing part of the data in the at least one first client signal with data from the at least one second client signal. The transmitting unit 801 is configured to output the first client signal and the second client signal. The separation of the at least one first customer signal and the at least one second customer signal from the at least one composite signal by the processing unit 802 may include: the processing unit 802 separates at least one path of data of the second client signal from the at least one path of synthesized signal, and adds a part of data indicating idle to form at least one path of second client signal. The transmitting apparatus 800 may further comprise a storage unit 803 for storing program codes and data of the transmitting device. The specific processing manner of the processing unit 802 may refer to the related description of the embodiment of the corresponding signaling method, and is not described again.

Fig. 9 shows a schematic diagram of a possible structure of the conveying system according to the above embodiment, which includes a first conveying device 901 and a second conveying device 902. Wherein, the first transmitting device 901 is configured to: receiving at least one first customer signal; compressing the bit rate required for transmitting the at least one first client signal, inserting data of the at least one second client signal to form at least one composite signal, or replacing part of the data in the at least one first client signal with the data of the at least one second client signal to form at least one composite signal; and sending the at least one path of synthesized signal. The second transfer device 902 is configured to: receiving the at least one synthesized signal, separating at least one first customer signal and at least one second customer signal from the at least one synthesized signal, and outputting the first customer signal and the second customer signal. The specific processing manner of the first transmitting apparatus 901 and the second transmitting apparatus 902 can refer to the related description of the embodiment of the corresponding signal transmission method and the related description of the embodiment of the corresponding transmitting apparatus, and is not repeated herein.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may be located in a transport network interface device. Of course, the processor and the storage medium may reside as discrete components in a transport network interface apparatus.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over 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 place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

Claims

1. A method of signaling, comprising:

receiving at least one first customer signal and at least one second customer signal;

compressing the bit rate required for transmitting the at least one first customer signal, inserting the data of the at least one second customer signal to form at least one composite signal;

and sending the at least one path of synthesized signal.

2. The method of claim 1, wherein said transmitting said at least one composite signal comprises:

and packaging the at least one path of synthesized signal into an Optical Transport Network (OTN) container to form at least one path of OTN signal, and sending the at least one path of OTN signal.

3. The method of claim 1 wherein said compressing the bit rate required for said at least one first customer signaling comprises:

compressing the bit rate required for transmission of said at least one first client signal by transcoding data of said at least one first client signal.

4. A method according to any one of claims 1 to 3, wherein compressing the bit rate required for transmission of the at least one first client signal and inserting data of the at least one second client signal to form the at least one composite signal comprises:

deleting the partial data which indicates the vacancy in the at least one path of second client signal;

compressing the bit rate required for the transmission of said at least one first client signal, inserting at least one second client signal data after deletion of the portion of data indicating idleness, to form at least one composite signal.

5. A method according to any of claims 1-3, wherein compressing the bit rate required for transmission of the at least one first client signal and inserting data of the at least one second client signal to form the at least one composite signal comprises: compressing the bit rate required for transmission of said at least one first client signal, inserting the client data in said at least one second client signal and the identification of said at least one second client signal to form at least one composite signal.

6. A method of signaling, comprising:

at least one path of the synthesized signal is received,

separating at least one first customer signal and at least one second customer signal from the at least one composite signal; wherein the at least one composite signal is obtained by compressing the bit rate required for transmission of the at least one first client signal and inserting data of at least one second client signal; and outputting the at least one first customer signal and the at least one second customer signal.

7. The method of claim 6, wherein said receiving at least one composite signal comprises:

and receiving at least one path of OTN signal, and decapsulating the at least one path of OTN signal to obtain at least one path of synthesized signal.

8. The method of claim 6 wherein said compressing the bit rate required for said at least one customer signaling comprises:

9. A signal transmission apparatus, characterized in that the transmission apparatus comprises: a receiving unit, a processing unit and a transmitting unit,

the receiving unit is used for receiving at least one path of first customer signal and at least one path of second customer signal;

the processing unit is configured to: compressing the bit rate required for transmitting the at least one first client signal, and inserting the data of the at least one second client signal to form at least one composite signal; or, replacing part of the data in the at least one first customer signal with the data in the at least one second customer signal to form at least one composite signal;

the sending unit is configured to send the at least one synthesized signal.

10. The transmission apparatus as claimed in claim 9, wherein said transmitting unit transmits said at least one synthesized signal includes:

and the sending unit packages the at least one path of synthesized signal into an Optical Transport Network (OTN) container to form at least one path of OTN signal and sends the at least one path of OTN signal.

11. The transfer apparatus of claim 9,

the processing unit is used for compressing the bit rate required by the transmission of the at least one path of first client signal by transcoding the data of the at least one path of first client signal.

12. The transfer device of any of claims 9-11,

the processing unit is configured to: deleting the partial data which indicates the vacancy in the at least one path of second client signal;

13. The transmitting device as claimed in any of claims 9-11, wherein said processing unit inserting at least one second client signal in a portion of the bits of said first client signal to form a composite signal comprises:

the processing unit inserts the customer data in the at least one second customer signal and the identification of the at least one second customer signal in part of the bits of the first customer signal to form a composite signal.

14. A signal transmission device, comprising:

a receiving unit, a processing unit and a transmitting unit,

the receiving unit is used for receiving at least one path of synthesized signal;

the processing unit is configured to separate at least one first client signal and at least one second client signal from the at least one composite signal, where the at least one composite signal is obtained by compressing a bit rate required for transmission of the at least one first client signal and inserting data of the at least one second client signal; the transmitting unit is used for outputting the first client signal and the second client signal.

15. A conveyor system, comprising: at least one conveyor according to any one of claims 9-13, and at least one conveyor according to claim 14.