Signal transmission method, communication device and storage medium

Abstract

Provided in the embodiments of the present application are a signal transmission method, a communication device and a storage medium. The communication device comprises at least one first conversion unit, a first crossing unit, at least one second crossing unit and at least one second conversion unit. In the embodiments of the present application, the signal transmission method comprises: by means of the first conversion unit, mapping a client signal to a first-type signal container and sending the first-type signal container to the first crossing unit; by means of the first crossing unit, scheduling the first-type signal container to the second crossing unit; by means of the second crossing unit, demapping the first-type signal container to a second-type signal container and cross-scheduling the second-type signal container to the first crossing unit; and by means of the first crossing unit, synchronously cross-scheduling the second-type signal container to a corresponding second conversion unit, which can demap the second-type signal container to a fifth signal container and demap the fifth signal container to the client signal.

Description

Signal transmission method, communication device and storage medium

[0001] Cross-references

[0002] This invention claims priority to the Chinese patent application filed with the China Patent Office on December 26, 2023, with application number 202311819621.8 and invention name “Signal Transmission Method, Communication Equipment and Storage Medium”. The entire contents of this application are incorporated by reference into this invention. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a signal transmission method, communication equipment and storage medium. Background Art

[0004] In the definition of the Optical Transport Network (OTN), multiple client signals are carried within the payload of an OTN signal by dividing the OTN payload into n timeslots. The client signals are then carried in one or more timeslots within the OTN payload, interleaving the timeslots with bytes. According to the OTN standard G.709, the timeslot granularity is the Optical Channel Data Unit (ODU), with the smallest granularity being ODU0, or 1.25G. This timeslot granularity results in significant bandwidth waste when carrying services below 1.25G, such as Fast Ethernet, Synchronous Transport Module, and E1 services. For example, an E1 service with a bandwidth of 2 megabits (M) is carried in a 1.25G timeslot, resulting in a bandwidth waste of up to 99%.

[0005] To improve the carrying capacity of OTN signal timeslots for fine-grained services, related technologies such as the fine-grain optical transport network (fgOTN) and optical service unit (OSU) have been proposed to carry fine-grained services below 1G. Fine-grained containers such as fgOTN or OSU can use time-division multiplexing (TDM) technology to carry 10Mbit / s small particles in the maximum ODU2 (10G) service layer using timeslots. In practice, client signals are encapsulated into corresponding fine-grained containers. These containers, acting as lower-rate containers, are first mapped to ODUj and then multiplexed into ODUk, or directly mapped and multiplexed into ODUk. Compared to the current ODUk minimum granularity of 1.25G, the minimum granularity of fine-grained containers is 10M. This significantly increases the number of services that can be carried.

[0006] To achieve fine-grained container cross-connection for fgOTN or OSU, ODUk demapping and mapping must be completed. However, a large number of legacy OTN devices in existing networks do not support fine-grained container technology, which significantly limits the efficiency of fine-grained container cross-connection. For example, existing fgOTN technology supports mapping up to ODU2 (dividing the ODU2 payload into 952 fine-grained service sub-timeslots) and cannot map to higher-order containers such as ODU3 / ODU4. If all time slots of the 10 ODU2s, 40 ODU1s, or 80 ODU0s in a single service slot on the backplane cannot support fgOTN, it is impossible to simultaneously demap fine-grained service sub-timeslots and route them to the fine-grained service plane via the backplane for cross-connection. Based on the current design architecture, the cross-connection capacity of a single fgOTN slot (200G / 400G / 1T bandwidth) is only around 20G, which is insufficient for full fgOTN cross-connection and significantly limits its practicality.

[0007] Summary of the Invention

[0008] The embodiments of the present application provide a signal transmission method, a communication device, and a storage medium, which aim to at least solve the problem that traditional cross-connection methods cannot achieve full cross-connection of fine-grained containers such as fgOTN due to the limited capacity of the lower backplane.

[0009] In a first aspect, an embodiment of the present application provides a communications device, comprising at least one first conversion unit, a first cross-connect unit, at least one second cross-connect unit, and at least one second conversion unit; wherein the first conversion unit is configured to map a client signal to a first signal container, map the first signal container to a second signal container, and send the second signal container to the first cross-connect unit; the first cross-connect unit is configured to cross-dispatch the second signal container from the first conversion unit to the corresponding second cross-connect unit; the second cross-connect unit is configured to demap the second signal container to a third signal container, map the third signal container to a fourth signal container, and cross-dispatch the fourth signal container to the first cross-connect unit; the first cross-connect unit is further configured to cross-dispatch the fourth signal container to the second conversion unit; the second conversion unit is configured to demap the fourth signal container to a fifth signal container, and demap the fifth signal container to the client signal; wherein the first, third, and fifth signal containers belong to a first type of signal container, the second and fourth signal containers belong to a second type of signal container, and the time slot granularity of the first type of signal container is smaller than the time slot granularity of the second type of signal container.

[0010] In a second aspect, an embodiment of the present application provides a signal transmission method, the method comprising: mapping a client signal to a first signal container through a first conversion unit, mapping the first signal container to a second signal container, and sending the second signal container to a first cross unit; cross-scheduling the second signal container from the first conversion unit to a corresponding second cross unit through the first cross unit; demapping the second signal container to a third signal container through the second cross unit, mapping the third signal container to a fourth signal container, and cross-scheduling the fourth signal container to the first cross unit; cross-scheduling the fourth signal container to the corresponding second conversion unit through the first cross unit; demapping the fourth signal container to a fifth signal container through the second conversion unit, and demapping the fifth signal container to the client signal; wherein the first signal container, the third signal container, and the fifth signal container belong to a first type of signal container, the second signal container and the fourth signal container belong to a second type of signal container, and the time slot granularity of the first type of signal container is smaller than the time slot granularity of the second type of signal container.

[0011] In a third aspect, an embodiment of the present application provides a communication device, comprising: one or more processors; a memory on which one or more programs are stored, and when the one or more programs are executed by the one or more processors, the one or more processors implement any signal transmission method proposed in the second aspect of the present application.

[0012] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any signal transmission method as described in the second aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0014] FIG1 is a flow chart of a signal transmission method;

[0015] FIG2 is a flow chart of another signal transmission method;

[0016] FIG3 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0017] FIG4 is a schematic diagram of a flow chart of a signal transmission method provided in an embodiment of the present application;

[0018] FIG5 is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application;

[0019] FIG6 is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application;

[0020] FIG7 is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application;

[0021] FIG8 is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application;

[0022] FIG9 is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application;

[0023] FIG10 is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application;

[0024] FIG11 is a schematic structural diagram of a second conversion unit provided in an embodiment of the present application;

[0025] FIG12 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0026] Reference numerals: first conversion unit 101 , first cross unit 102 , second cross unit 103 , second conversion unit 104 ; third conversion unit 105 , fourth conversion unit 106 . DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution provided by the present application is described in detail below with reference to the accompanying drawings.

[0028] Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but the described example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the scope of this application to those skilled in the art.

[0029] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0030] The terms used herein are used only to describe specific embodiments and are not intended to limit this application. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, they specify the presence of features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof.

[0031] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0032] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present application, and will not be interpreted as having an idealized or overly formal meaning, unless clearly defined in the examples of the present application.

[0033] To facilitate a better understanding of the solutions of the embodiments of the present application, the relevant technologies are first introduced below.

[0034] The Optical Transport Network (OTN) is a transport network based on wavelength division multiplexing technology and organized at the optical layer. It is the next-generation backbone transport network of dense wavelength division multiplexing (DWDM). It can solve the problems of traditional wavelength division multiplexing networks such as poor wavelength / sub-wavelength service scheduling capabilities and weak networking protection capabilities.

[0035] In the definition of an optical transport network, multiple client signals are carried in the payload of an OTN signal by dividing the payload into n timeslots. The client signals are then carried in one or more timeslots within the payload of the OTN signal, with the timeslots interleaved with bytes. According to the ITU-T International Telecommunication Union, OTN is divided into the following seven layers:

[0036] (1) Client signal layer: refers to the client signals carried by the OTN network, including IP, Ethernet, SDH, etc.

[0037] (2) Optical Channel Payload Unit (OPU): used to adapt the client signal to make it suitable for transmission on the optical channel.

[0038] (3) Optical Channel Data Unit (ODU): With the OPU as the net load and corresponding overhead, it provides end-to-end optical channel performance monitoring and enables end-to-end transmission of customer signals in the OTN network.

[0039] (4) Optical Channel Transport Unit (OTU): With ODU as the net load and corresponding overhead, it provides FEC function and performance monitoring of OTU segments, enabling the transmission of customer signals between 3R regeneration points in the OTN network.

[0040] (5) Optical Channel layer (OCH): Provides end-to-end networking for client signals. Each optical channel (OCH) occupies one optical wavelength to enable client signal transmission between access points.

[0041] (6) Optical Multiplex Section layer (OMS): Provides networking capabilities for wavelength-division multiplexed multi-wavelength signals, enabling the transmission of optical channels between access points.

[0042] (7) Optical Transmission Section layer (OTS): Provides the function of transmitting optical signals on optical fibers and realizes the transmission of optical multiplexing sections between access points.

[0043] OTUs and ODUs are key optical channel units in the OTN network, enabling efficient and reliable data transmission. According to the OTN standard G.709, the minimum timeslot granularity for OTN technology is 1.25G. This granularity results in significant bandwidth waste when carrying services below 1.25G, such as Fast Ethernet (FE), Synchronous Transport Module-1 (STM-1), and E1 services. For example, an E1 service with a bandwidth of 2 megabits (Mbps) carried in a 1.25G timeslot results in a bandwidth waste of up to 99%. Therefore, a transmission technology is needed to efficiently carry fine-grained services in the OTN network.

[0044] fgOTN (fine-grain OTN) is a major technological innovation based on hard pipe technology within the OTN framework, representing the next evolution of OTN technology. It is primarily targeted at carrying high-quality services at sub-1G granularity. It is widely applicable to government and enterprise networks, as well as dedicated lines in industries such as power and healthcare, and provides high-quality access to computing networks for enterprise production systems. It efficiently carries fine-grained and packet-based services by dividing the existing ODU payload into cells or timeslots at a finer granularity. fgOTN technology uses a 1.25G ODU0 divided into 119 fixed timeslots, each with 10.4M sub-timeslots. This supports encapsulation into ODU2s with up to 952 sub-timeslots. Mapping to higher-order granularity such as ODU3 / ODU4 is not possible, and traditional solutions are used to parallelize the large-granularity ODUk with the fine-granularity fgOTN.

[0045] The Optical Service Unit (OSU) addresses the shortcomings of traditional OTN technology. It shifts from the traditional OTN frame structure, which uses time slots, to a more flexible payload block structure. This allows for efficient transport of services with varying granularity, from 2M to 100Gbps, and supports k-level connections. Traditional OTN uses time slots to divide its frame structure, supporting a maximum of 80 time slots and a minimum time slot granularity of 1.25Gbps. This means that the maximum number of service accesses per ODU is 80, and the minimum bandwidth required to efficiently carry customer services is 1.25Gbps. OSU technology, however, employs a completely new structure: the ODU frame is divided into a number of payload blocks (PBs), with one OSU occupying one or more PBs. OSU technology allows for flexible configuration of the PB bandwidth, which determines the minimum granularity of customer services supported by the OSU. By configuring the OSU bandwidth, the OSU can efficiently carry fine-grained services.

[0046] In traditional OTN equipment, the service board and cross-board are linked by a backplane bus to achieve the transmission and exchange of different service data. The particle container is connected to the cross-unit via the backplane and output to the corresponding branch disk, and then undergoes electro-optical conversion and is finally output to the interface of the corresponding service. Conversely, the customer signal first enters the branch disk through the service interface for optoelectronic conversion and enters the particle container. The particle container is then connected to the cross-unit via the backplane for exchange and is output to the corresponding line disk for electro-optical conversion.

[0047] Implementing fgOTN fine-grained container cross-connection requires demapping and mapping ODUk to fine-grained containers. However, existing fgOTN technology supports mapping up to ODU2 (dividing the ODU2 payload into 952 fine-grained service sub-timeslots) and cannot map to higher-order containers such as ODU3 / ODU4. If all time slots in the 10 ODU2s, 40 ODU1s, or 80 ODU0s in a single backplane service slot cannot support fine-grained service containers, it is impossible to simultaneously demap the fine-grained service sub-timeslots and cross-connect them through the backplane to the fine-grained service plane. Based on the current design architecture, the cross-connection capacity of a single fgOTN slot (200G / 400G / 1T bandwidth) is only around 20G, which is incapable of fully cross-connecting fine-grained containers, severely limiting its use.

[0048] Therefore, how to solve the problem of being unable to achieve full cross-connection of fine-grained containers when using traditional cross-connection methods due to limited capacity of the lower backplane, and how to transform the existing network's old OTN equipment to support fine-grained technologies such as fgOTN to protect investment and extend service life are technical issues that need to be solved urgently.

[0049] In view of this, the present application breaks the traditional parallel crossover method of large-particle containers ODUk and fine-particle containers (such as fgOTN or OSU) behind the backplane, and proposes a two-level crossover method of ODUk and fine-particle containers, so that all ODU particles in a single slot of the business segment can enter the cross-board crossover through the backplane, and the fine-particle cross-board such as the fgOTN cross-board or the OSU cross-board can cross the fine-particle containers carried by the ODUk without obstruction. With the help of the two-level crossover method of ODUk and fine-particle containers, the limitation of the traditional crossover method on the crossover of fine-particle containers due to the limited capacity of the lower backplane is broken.

[0050] Please refer to Figure 1, which is a flowchart of a signal transmission method. Customer signals for fine-grained services such as E1, STM-1, STM-4, FE, GE, and 10GE are mapped to fine-grained containers through a conversion board and further mapped to ODUk or ODUflex. At the same time, other OTUk signals are mapped or demapped to ODUk or ODUflex through the conversion board. The ODUk and ODUflex enter the switching plane of traditional OTN equipment, implement time-division cross-connection of ODU0 / 1 / 2 / ODUfelx, and then perform further mapping on the lower backplane. The cross-connected ODUk and ODUflex are connected to the conversion board, mapped to OTUk, and then further enter the multiplexing / demultiplexing board for multiplexing and demultiplexing operations to output DWDM. This traditional method cannot achieve full cross-connection of fine-grained containers. After adopting the method of the present application, as shown in FIG1 , based on the traditional OTN equipment, ODU0 / 1 / 2 / ODUfelx can be further demapped into fine-grained containers and then fine-grained cross-connected, and then further mapped into ODU0 / 1 / 2 / ODUfelx and re-entered into the cross-connection plane for cross-connection.

[0051] Please refer to Figure 2, which is a flowchart of another signal transmission method. Customer signals such as E1, STM-1, STM-4, FE, GE, 10GE and other fine-grained services are connected to the conversion board to achieve mapping or demapping to fine-grained containers, further mapped to ODUk or ODUflex, cut into cells (Cells) and enter the Cell switching plane; large-grained cells are used to enter the traditional OTN equipment cross panel for time division cross-connection, and the cross-scheduled cells are cut into ODUk and ODUflex, connected to the conversion board, and mapped or demapped to OTUk, and then further enter the multiplexing / demultiplexing board for multiplexing and demultiplexing operations to output DWDM. After adopting the method of the present application, as shown in Figure 2, based on the traditional OTN equipment, the cells are cut into ODU0 / 1 / 2 / ODUfelx and then demapped into fine-grained containers for fine-grained cross-connection. They are further mapped to ODU0 / 1 / 2 / ODUfelx and then cut into cells and re-enter the cross-connection plane for cross-connection.

[0052] ODU stands for Optical Data Unit (ODU), where ODUk represents an optical data unit with k = 0, 1, or 2. The minimum timeslot granularity of ODU0 is 1.25G, capable of carrying services below 1.25G. The minimum timeslot granularity of ODU1 is 2.5G, and the timeslot granularity of ODU2 is 5G. ODUflex is a flexible rate optical digital unit that enables automatic adaptive transport of data through container conversion. The fine-grained container in Figures 1 and 2 is fgOTN. In addition to the fgOTN fine-grained container shown in the figures, an OSU can also be used.

[0053] It can be understood that, as shown in Figures 1 and 2, after adopting the method of the present application, a fine-grained cross-connection method is added to the hardware, so that the traditional OTN equipment that only supports ODUk can support fine-grained service cross-connection and scheduling.

[0054] Please refer to Figure 3, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 3, the communication device 100 in the embodiment of the present application includes at least one first conversion unit 101, a first cross unit 102, at least one second cross unit 103 and a second conversion unit 104.

[0055] Exemplarily, the first conversion unit 101 can be a conversion board (also called a service board), which is used to connect customer signals and map the customer signals to a first signal container and then further map them to a second signal container. The second signal container can be sent to the first cross unit through the first conversion unit 101.

[0056] Exemplarily, the first cross unit 102 may be a cross board, which is used to implement cross scheduling of the second signal container and the fourth signal container, receive the second signal container sent by the first conversion unit, or cross schedule the fourth signal container to the second conversion unit.

[0057] Exemplarily, the second cross-connect unit 103 may be a cross-connect board, which is used to demap the second signal container to a third signal container and then map the third signal container to a fourth signal container, and to perform cross-connect scheduling on the fourth signal container and then send it to the first cross-connect unit.

[0058] Exemplarily, the second conversion unit 104 may be a conversion board (also referred to as a service board), which is used to demap the fourth signal container into a fifth signal container and then further demap it to a customer interface for landing or subsequent mapping transmission.

[0059] It should be noted that, in some cases, the first conversion unit 101 and the second conversion unit 104 may be the same conversion unit. In this case, the first conversion unit 101 and the second conversion unit 104 may implement the same function.

[0060] Specifically, the first conversion unit 101 can be a CBR conversion board that carries a fine-grained signal container for constant bit rate (CBR) services to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7), or a PKT conversion board that carries a fine-grained signal container for packet PKT services to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7). The fine-grained signal container here can be fgOTN or OSU.

[0061] The second conversion unit 104 may be a conversion board, specifically a conversion board that carries a fine-grained signal container for a constant bit rate (CBR) service to an ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) service, or a conversion board that carries a fine-grained signal container for a packet PKT service to an ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) service.

[0062] The first cross-connect unit 102 is an optical transport network OTN cross-connect board or a cell switching device, and the second cross-connect unit 103 is an fgOTN cross-connect board or an OSU cross-connect board.

[0063] It should be noted that the CBR conversion board can be used to implement the interconnection of CBR fine-grained services such as E1, STM-1, and STM-4, while the PKT conversion board can be used to implement the interconnection of PKT services such as FE, GE, and 10GE.

[0064] It should be noted that due to the limited capacity of the backplane under the OTN cross-connect board, the large-granularity ODUk and the fine-granularity fgOTN / OSU cannot achieve full-scale cross-connection through parallel cross-connection using the lower backplane. Therefore, in the embodiment of the present application, it is proposed to adopt time-division cross-connection of large-granularity ODUk and two-level cross-connection with fine-granularity fgOTN / OSU, and propose a second cross-connection unit based on the first cross-connection unit to solve the above problem.

[0065] In an embodiment of the present application, the first conversion unit is used to map the client signal to a first signal container, map the first signal container to a second signal container, and send the second signal container to the first cross unit; the first cross unit is used to cross-dispatcher the second signal container from the first conversion unit to the corresponding second cross unit; the second cross unit is used to demap the second signal container to a third signal container, map the third signal container to a fourth signal container, and cross-dispatcher the fourth signal container to the first cross unit; the first cross unit is also used to cross-dispatcher the fourth signal container to the second conversion unit; the second conversion unit is used to demap the fourth signal container to a fifth signal container, and demap the fifth signal container to the client signal.

[0066] The first signal container, the third signal container, and the fifth signal container belong to the first type of signal container. The first type of signal container is a fine-grained signal container, which is one of the following:

[0067] Fine-grained optical transport network (fgOTN) frame; or optical service unit (OSU).

[0068] The second signal container and the fourth signal container belong to the second type of signal container. The second type of signal container is a large particle signal container and is one of the following:

[0069] Optical data unit ODUk, k=0, 1 or 2; flexible optical data unit ODUflex n, n=3, 4, 5, 6 or 7; cell Cell.

[0070] In an embodiment of the present application, the client signal is a client signal with a transmission rate less than 1.25G, the time slot granularity of the first type of signal container used is smaller than the time slot granularity of the second type of signal container used, and the first type of signal container can be mapped and encapsulated into the second type of signal container. The second type of signal container is a large-grain signal container. In this way, full utilization of the large-grain container is achieved, avoiding the problem of bandwidth waste.

[0071] In one embodiment of the present application, the communication device further includes at least one third conversion unit, the third conversion unit being configured to demap an optical conversion unit (OTU) into a second signal container and send the second signal container to the first cross-connect unit. The third conversion unit may be a conversion board, and the first cross-connect unit is further configured to cross-dispatch the second signal container from the third conversion unit to the corresponding second cross-connect unit. The third conversion unit may be an OTU-to-ODU conversion board.

[0072] In one embodiment of the present application, the communication device further includes at least one fourth conversion unit, wherein the first cross-connect unit is configured to cross-dispatch the fourth signal container to the corresponding fourth conversion unit, and the fourth conversion unit is configured to map the fourth signal container to the OTU. The fourth conversion unit may be an ODU-to-OTU conversion board.

[0073] It should be noted that in the embodiment of the present application, there is at least one of the first conversion unit, the second conversion unit, the third conversion unit and the fourth conversion unit, and the specific number thereof is not limited in this application.

[0074] It should be noted that, in the embodiment of the present application, the conversion unit for each type of service includes a master conversion unit and a slave conversion unit.

[0075] Please refer to Figure 11, which is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application. As shown in Figure 11, in one embodiment of the present application, the fgOTN cross-connect board used in the second cross-connect unit can be one or multiple cross-connect boards, and the two cross-connect boards protect each other. The specific number of cross-connect boards can be determined according to actual needs and is not limited to the number shown in Figure 11. The multiple cross-connect boards are divided into master boards and slave boards, which are respectively provided for the master conversion unit and the slave conversion unit. When the master conversion unit fails, the slave conversion unit can still operate normally, and vice versa, thereby playing a role of mutual protection.

[0076] Please refer to Figure 4, which is a flow chart of a signal transmission method provided in an embodiment of the present application. The method includes the following steps:

[0077] Step S101 : Map a client signal to a first signal container through a first conversion unit, map the first signal container to a second signal container, and send the second signal container to a first cross-connect unit.

[0078] Step S102 : Cross-dispatching the second signal container from the first conversion unit to the corresponding second cross-unit through the first cross-unit.

[0079] Step S103 : Demap the second signal container to a third signal container through the second cross-connect unit, map the third signal container to a fourth signal container, and cross-dispatch the fourth signal container to the first cross-connect unit.

[0080] Step S104: Cross-dispatching the fourth signal container to the corresponding second conversion unit through the first cross-connect unit.

[0081] Step S105 : Demap the fourth signal container into a fifth signal container through the second conversion unit, and demap the fifth signal container into a client signal.

[0082] It can be understood that in the embodiment of the present application, the client signal is a client signal with a transmission rate less than 1.25G, the first signal container, the third signal container and the fifth signal container belong to the first type of signal container, the first type of signal container is a fine-grained signal container, which can be fgOTN or OSU, the second signal container and the fourth signal container belong to the second type of signal container, the second type of signal container is a large-grained signal container, which can be ODUO / 1 / 2, ODUflex n (n=3 to 7) or Cell; the time slot granularity of the first type of signal container used is smaller than the time slot granularity of the second type of signal container used.

[0083] Illustratively, in step S101, the first conversion unit maps the customer signal, i.e., fine-grained service, such as E1, STM-1, STM-4, FE, GE, 10GE, etc., which is less than 1.25G, to a first signal container. The first signal container can be fgOTN or OSU. The first signal container is further mapped to a second signal container. The second signal container can be one of the three signal containers, ODU0 / 1 / 2, ODUflex, or Cell. This preliminarily completes the mapping of the fine-grained service into the large-grained signal container, and then sends it to the first cross-connect unit.

[0084] Go to step S102, through the first cross-connect unit ODUk hierarchical sub-cross-connection, all ODUks with fine particles (such as fgOTN sub-timeslots) coming from all directions are cross-scheduled through the first cross-connect unit and enter the second cross-connect unit.

[0085] Step S103 is performed. After receiving the second signal container, the second cross-connect unit demaps it into a third signal container and maps the third signal container into a fourth signal container. The third signal container is a signal container carrying fine particles such as fgOTN, and the fourth signal container is one of the three signal containers of ODU0 / 1 / 2, ODUflex or Cell. The fourth signal container is returned to the first cross-connect unit through the second cross-connect unit. Steps S102 and S103 perform two-level cross-connection of large particle cross-connection and fine particle cross-connection through the first cross-connect unit and the second cross-connect unit to realize conversion from large particles to fine particles and cross-connection scheduling of fine particles. Compared with the traditional method of using only large particle cross-connection, the use of more first-level fine particle cross-connection can effectively improve the cross-connection capability of the backplane under the single slot of fgOTN.

[0086] Go to step S104 , perform large-granularity cross-connect scheduling again through the first cross-connect unit, and send the fourth signal container to the second conversion unit.

[0087] After step S105 is performed, the fourth signal container is demapped and converted into a fifth signal container by the second conversion unit, and then the fifth signal container is further demapped to a corresponding client interface for implementation.

[0088] The following further describes the embodiment of the present application in detail through a schematic diagram of unit connections in a communication device.

[0089] For example, please refer to FIG5 , which is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application. As shown in FIG5 , in this embodiment of the present application, an fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR) is used as a first conversion unit 101, which is used to receive fine-grained client signals E1, STM-1, and STM-4. After the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR) receives the client signal, it is mapped into a first signal container fgOTN, and further mapped into a second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7), the second signal container is sent to the first cross-connect unit 102, that is, the OTN cross-connect board, and the ODUk hierarchical sub-crossing is performed through the OTN cross-connect board. The ODUk cross-connections containing fine-grained sub-timeslots from all directions are collected in the OTN cross-connect board and scheduled to the second cross-connect unit 103. In the figure, the second cross-connect unit 103 is an fgOTN cross-connect board. The fgOTN cross-connect board completes the demapping of the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) to the third signal container fgOTN and performs fine-grained cross scheduling. Then, the third signal container is mapped to the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and sent to the first cross-connect unit 102. The first cross-connect unit 102 sends the fourth signal container to the second conversion unit 104 for demapping, and the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) Convert to the fifth signal container fgOTN, and then further demap the fifth signal container to the E1, STM-1, and STM-4 interfaces. The second conversion unit is the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR).

[0090] It should be noted that, in FIG5 , the first conversion unit 101 and the second conversion unit 104 are both connected to process fine-grained client signals E1, STM-1, and STM-4. Therefore, the first conversion unit 101 and the second conversion unit 104 both use fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion boards (CBR). The first conversion unit 101 and the second conversion unit 104 can also both use fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion boards (PKT) or both use OSU to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion boards. The OSU conversion board can implement the function of mapping the OSU to the second type of signal container.

[0091] For example, please refer to FIG6, which is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application. As shown in FIG6, in this embodiment of the present application, a fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT) is used as a first conversion unit 101 for receiving fine-grained client signals FE, GE, and 10GE. After the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT) receives the client signal, it is mapped to the first signal container fgOTN, and further mapped to the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7), the second signal container is sent to the first cross-connect unit 102, that is, the OTN cross-connect board, and the ODUk hierarchical sub-crossing is performed through the OTN cross-connect board. The ODUk cross-connections containing fine-grained sub-timeslots from all directions are collected in the OTN cross-connect board and scheduled to the second cross-connect unit 103. In the figure, the second cross-connect unit 103 is an fgOTN cross-connect board. The fgOTN cross-connect board completes the demapping of the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) to the third signal container fgOTN and performs fine-grained cross scheduling. Then, the third signal container is mapped to the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and sent to the first cross-connect unit 102. The first cross-connect unit 102 sends the fourth signal container to the second conversion unit 104 for demapping, and the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) Convert to the fifth signal container fgOTN, and then further demap the fifth signal container to FE, GE and 10GE interface landing. The second conversion unit is the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT).

[0092] It can be understood that in the embodiment of the present application, the first signal container, the third signal container and the fifth signal container are first-type signal containers, and the first-type signal containers are all fine-particle signal containers. The second signal container and the fourth signal container are both second-type signal containers, and the second signal container is a large-particle signal container.

[0093] It can be understood that, in addition to being an ODU cross-board, the first cross-unit can also be a cell switching device, which is used to implement cross-scheduling of ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) into cells to the corresponding units. In addition to being an fgOTN cross-board, the second cross-unit can also be an OSU cross-board. The OSU cross-board can implement demapping of the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) to the third signal container OSU and perform fine-grained cross scheduling, and then map the third signal container to the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and send it to the first cross-unit 102.

[0094] It can be understood that, in the embodiment of the present application, the setting for the first conversion unit can be multiple in addition to one. Please refer to Figure 7, which is a schematic diagram of unit connection in a communication device provided in an embodiment of the present application. As shown in Figure 7, in an embodiment of the present application, two fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion boards (CBR) are provided as the first conversion unit 101. The two fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion boards (CBR) respectively receive customer signals E1, STM-1 and STM-4 and map them into fine-grained signal containers fgOTN, i.e., the first signal container, and further map them into large-grained signal containers ODU0 / 1 / 2 / ODUfelx n (n=3 to 7), i.e., the second signal container. Through the first conversion unit 101, fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) are converted into a large-grained signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7). 7) The conversion board (CBR) sends the second signal container to the first cross-connect unit 102, i.e., the OTN cross-connect board. The OTN cross-connect board performs ODUk hierarchical sub-crossing. The OTN cross-connect board collects ODUk sub-timeslots from all directions and schedules them to the second cross-connect unit 103. In the figure, the second cross-connect unit 103 is an fgOTN cross-connect board. The fgOTN cross-connect board demaps the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) to the third signal container fgOTN and performs fine-grained cross scheduling. The third signal container is then mapped to the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and sent to the first cross-connect unit 102. The first cross-connect unit 102 sends the fourth signal container to the second conversion unit 104. The second conversion unit 104 converts the ODUk sub-timeslots from fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7). 7) The conversion board (CBR) demaps the fourth signal container into a fifth signal container, and then demaps the fifth signal container to the corresponding customer interface. In the embodiment of Figure 7, the second conversion unit is the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n = 3 to 7) conversion board (CBR), so the corresponding customer interfaces are E1 interface, STM-1 interface and STM-4 interface.

[0095] It is understood that the configuration of the first conversion unit 101 in the embodiment of the present application is not limited to the two shown in the embodiment of FIG. 7 , but can be configured with two or more as needed. The conversion board of the first conversion unit 101 can be selected based on the specific client signals and fine-grained signal containers to be connected, such as the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR), the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT), the OSU to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board, etc. The OSU conversion board can implement the function of mapping the OSU to the second type of signal container.

[0096] It can be understood that, in addition to being an ODU cross-board, the first cross-unit can also be a cell switching device, which is used to implement cross-scheduling of ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) into cells to the corresponding units. In addition to being an fgOTN cross-board, the second cross-unit can also be an OSU cross-board. The OSU cross-board can implement demapping of the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) to the third signal container OSU and perform fine-grained cross scheduling, and then map the third signal container to the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and send it to the first cross-unit 102.

[0097] It should be noted that, in the embodiment of the present application, the second conversion unit may be set to multiple units other than one. Please refer to FIG8 , which is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application. As shown in FIG8 , in an embodiment of the present application, a fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR) and a fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT) are set as the first conversion unit 101, and a fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR) and a fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT) are correspondingly set as the second conversion unit 104. The fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR) is used to receive fine-grained client signals E1, STM-1 and STM-4. 7) After receiving the client signal, the conversion board (CBR) maps it into the first signal container fgOTN, and further maps it into the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7), and sends the second signal container to the first cross-connect unit 102, that is, the OTN cross-connect board. The fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT) is used to receive fine-grained client signals FE, GE, and 10GE. After receiving the client signal, the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT) maps it into the first signal container fgOTN, and further maps it into the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7), and sends the second signal container to the first cross-connect unit 102, that is, the OTN cross-connect board.ODUk hierarchical sub-crossing is performed through the OTN cross-connect board. ODUk sub-timeslots containing fine-grained sub-timeslots from all directions are collected in the OTN cross-connect board and cross-scheduled to the second cross-connect unit 103. In the figure, the second cross-connect unit 103 is an fgOTN cross-connect board. The fgOTN cross-connect board demaps the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) into the third signal container fgOTN and performs fine-grained cross-scheduling. The third signal container is then mapped into the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and sent to the first cross-connect unit 102. The first cross-connect unit 102 sends the fourth signal container to the second conversion unit 104 for demapping. The fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR) converts the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) into the third signal container fgOTN. 7) Convert the signal container to the fifth signal container fgOTN, and then demap the fifth signal container to the E1, STM-1, and STM-4 interfaces. The fgOTN to ODU0 / 1 / 2 / ODUfelx n (n = 3 to 7) converter board (PKT) converts the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n = 3 to 7) to the fifth signal container fgOTN, and then demaps the fifth signal container to the FE, GE, and 10GE interfaces.

[0098] It should be noted that an ODU can map fgOTN with client signals E1, STM-1 and STM-4 after being processed by the CBR conversion board, or fgOTN with client signals FE, GE and 10GE after being processed by the PKT conversion board. ODU can achieve mixed mapping of OTN processed by a portion of the CBR conversion board and OTN processed by a portion of the PKT conversion board. However, the reception and landing of client signals can only be achieved through the corresponding interfaces. For example, the reception and landing of client signals E1, STM-1, and STM-4 can only be completed through the corresponding interfaces of the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR), and client signals FE, GE, and 10GE can only be completed through the corresponding interfaces of the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT). Therefore, when multiple first and second conversion units are set according to actual needs, if client signals E1, STM-1, and STM-4 need to be processed, the first and second conversion units need to be set to be fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) 7) Conversion board (CBR), processing customer signals FE, GE and 10GE, it is necessary to set the first conversion unit and the second conversion unit to be fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT).

[0099] It is understood that the configuration of the second conversion unit 104 in the embodiment of the present application is not limited to the two shown in the embodiment of FIG8 , but can be configured with two or more as needed. The conversion board of the second conversion unit 101 can be selected based on the specific client signal and fine-grained signal container to be connected, such as the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR), the fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (PKT), the OSU to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board, etc. The OSU conversion board can implement the function of mapping the OSU to the second type of signal container.

[0100] It can be understood that, in addition to being an ODU cross-board, the first cross-unit can also be a cell switching device, which is used to implement cross-scheduling of ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) into cells to the corresponding units. In addition to being an fgOTN cross-board, the second cross-unit can also be an OSU cross-board. The OSU cross-board can implement demapping of the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) to the third signal container OSU and perform fine-grained cross scheduling, and then map the third signal container to the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and send it to the first cross-unit 102.

[0101] Please refer to Figure 9, which is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application. As shown in Figure 9, in one embodiment of the present application, the communication device further includes a third conversion unit 105. In this embodiment, the third conversion unit 105 is an OTUk to ODUk conversion board that can demap the signal container OTU into a second signal container.

[0102] Exemplarily, a fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) conversion board (CBR) is used as the first conversion unit 101 to receive the client signal E1, STM-1 and STM-4, map them into the first signal container fgOTN, and further map them into the second signal container ODU0 / 1 / 2 / ODUflex (n=3 to 7). The third conversion unit 105 receives the optical conversion unit OTUk and demaps the OTUk into the second signal container ODU0 / 1 / 2 / ODUflex (n=3 to 7). The first conversion unit and the third conversion unit 105 respectively send the second signal container to the first cross-connect unit 102, i.e., the OTN cross-connect board, which performs ODUk hierarchical sub-crossing through the OTN cross-connect board, wherein the second signal container ODU0 / 1 / 2 / ODUflex (n=3 to 7) containing fine-grained sub-timeslots is received. 7) The data is cross-scheduled to the second cross-slot unit 103 through the first cross-slot unit 102 to complete the subsequent steps, and the data that does not contain fine-grained sub-time slots is sent to the corresponding conversion unit after cross-scheduling.

[0103] It can be understood that in the embodiment of the present application, the third conversion unit can be one as shown in Figure 9, or more than one, and the number is set according to specific needs and is not limited to the number shown in Figure 9.

[0104] Please refer to Figure 10, which is a schematic diagram of unit connections in a communication device provided in an embodiment of the present application. As shown in Figure 10, in one embodiment of the present application, the communication device further includes a fourth conversion unit 106. In this embodiment, the fourth conversion unit 106 is an OTUk to ODUk conversion board that can map the fourth signal container to the signal container OTU.

[0105] For example, a conversion board (CBR) from fgOTN to ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) is used as a first conversion unit 101 to receive client signals E1, STM-1, and STM-4, map them into a first signal container fgOTN, and further map them into a second signal container ODU0 / 1 / 2 / ODUflex (n=3 to 7). The first conversion unit sends the second signal container to a first cross-connect unit 102, i.e., an OTN cross-connect board, which performs ODUk hierarchical sub-crossing through the OTN cross-connect board. The second signal container ODU0 / 1 / 2 / ODUflex (n=3 to 7) containing fine-grained sub-time slots is cross-dispatched to a second cross-connect unit 103 through the first cross-connect unit 102, and the second signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) is completed through the second conversion unit. 7) After demapping to the third signal container fgOTN and performing fine-grained cross-scheduling, the third signal container is mapped to the fourth signal container ODU0 / 1 / 2 / ODUfelx n (n=3 to 7) and sent to the first cross-connect unit 102. The first cross-connect unit 102 sends part of the fourth signal container to the second conversion unit to complete subsequent steps, and at the same time sends part of the fourth signal container to the fourth conversion unit 106. The fourth signal container is mapped to OTUk through 106, thereby realizing the function of converting the fourth signal container into the signal container OTU and transmitting it.

[0106] It should be noted that by adopting the communication equipment proposed in the embodiments of this application, a small-granularity cross-connect board can be added to the hardware to enable support for small-granularity service cross-connection and scheduling on traditional OTN equipment that only supports ODUk. This eliminates the need for users to repurchase equipment for small-granularity service functions such as fine-granularity containers, thus protecting customer investment.

[0107] Please refer to FIG. 12 , which is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

[0108] An embodiment of the present application also provides an electronic device, as shown in Figure 12, the electronic device 1400 includes: one or more processors 1410; a memory 1420, on which one or more programs are stored. When the one or more programs are executed by the one or more processors 1410, the one or more processors 1410 implement: the signal transmission method proposed in this application.

[0109] The memory 1420 is a non-transient network system that can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory 1420 may include a high-speed random access memory and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory 1420 may optionally include a memory 1420 remotely located relative to the processor 1410, and these remote memories 1420 may be connected to the processor 1410 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0110] The memory 1420 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1420 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1420 and is called by the processor 1410 to execute the methods of the embodiments of this application.

[0111] The processor 1410 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application.

[0112] In some embodiments, the electronic device further includes: an input / output interface for implementing information input and output; a communication interface for implementing communication interaction between the device and other devices, which can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.); a bus for transmitting information between various components of the device (such as the processor 1410, memory 1420, input / output interface, and communication interface);

[0113] The processor 1410 , the memory 1420 , the input / output interface, and the communication interface can be communicatively connected to each other within the device via a bus.

[0114] An embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions for executing:

[0115] The signal transmission method proposed in this application.

[0116] An embodiment of the present application further provides a computer program product, including a computer program or computer instructions, wherein the computer program or computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device performs the following operations:

[0117] The signal transmission method proposed in this application.

[0118] The system architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of the system architecture and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

[0119] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0120] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include computer storage media (or non-transitory media) and communication media (or temporary media). As known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disk (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0121] The above description of some embodiments of the present application with reference to the accompanying drawings does not limit the scope of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.

Claims

1. A communication device, comprising at least one first conversion unit, a first cross-connect unit, at least one second cross-connect unit, and at least one second conversion unit; wherein, the first conversion unit is configured to map a client signal to a first signal container, map the first signal container to a second signal container, and send the second signal container to the first cross-connect unit; the first cross-connect unit is configured to cross-schedule the second signal container from the first conversion unit to the corresponding second cross-connect unit; the second cross-connect unit is configured to demap the second signal container to a third signal container, map the third signal container to a fourth signal container, and cross-schedule the fourth signal container to the first cross-connect unit; the first cross-connect unit is further configured to cross-schedule the fourth signal container to the second conversion unit; the second conversion unit is configured to demap the fourth signal container to a fifth signal container, and demap the fifth signal container to the client signal; wherein, the first signal container, the third signal container, and the fifth signal container belong to a first type of signal container, the second signal container and the fourth signal container belong to a second type of signal container, and the time slot granularity of the first type of signal container is smaller than that of the second type of signal container.

2. The communication device according to claim 1, wherein, It further comprises at least one third conversion unit, and the third conversion unit is configured to demap an optical transport unit OTU to the second signal container, and send the second signal container to the first cross-connect unit; the first cross-connect unit is further configured to cross-schedule the second signal container from the third conversion unit to the corresponding second cross-connect unit.

3. The communication device according to claim 2, wherein, It further comprises at least one fourth conversion unit; the first cross-connect unit is further configured to cross-schedule the fourth signal container to the corresponding fourth conversion unit; the fourth conversion unit is configured to map the fourth signal container to the OTU.

4. The communication device according to claim 1, wherein, The first cross-connect unit is an optical transport network OTN cross-board or a cell switching device.

5. The communication device according to claim 1, wherein, The first type of signal container is one of the following: Fine-grained optical transport network fgOTN frame; Or, Optical service unit OSU.

6. The communication device according to claim 1, wherein, The second type of signal container is one of the following: Optical data unit ODUk, k = 0, 1 or 2; Flexible optical data unit ODUflex n, n = 3, 4, 5, 6 or 7; Cell.

7. The communication device according to claim 1, wherein, The first conversion unit includes conversion units for multiple types of services.

8. The communication device according to claim 6, wherein, Each type of service conversion unit correspondingly includes a main conversion unit and a slave conversion unit.

9. The communication device according to claim 1, wherein, The client signal is a client signal with a transmission rate less than 1.25G.

10. A signal transmission method, the method comprising: mapping a client signal to a first signal container through a first conversion unit, mapping the first signal container to a second signal container, and sending the second signal container to a first cross-connect unit; cross-scheduling the second signal container from the first conversion unit to the corresponding second cross-connect unit through the first cross-connect unit; Demap the second signal container to a third signal container via the second cross unit, map the third signal container to a fourth signal container, and cross-schedule the fourth signal container to the first cross unit; Cross-schedule the fourth signal container to a corresponding second conversion unit via the first cross unit; Demap the fourth signal container to a fifth signal container via the second conversion unit, and demap the fifth signal container to the client signal; Wherein, the first signal container, the third signal container, and the fifth signal container belong to a first type of signal container, the second signal container and the fourth signal container belong to a second type of signal container, and the time slot granularity of the first type of signal container is smaller than the time slot granularity of the second type of signal container.

11. The method according to claim 10, wherein, The method further includes: Demap an optical transport unit OTU to the second signal container via a third conversion unit, and send the second signal container to the first cross unit; Cross-schedule the second signal container from the third conversion unit to the corresponding second cross unit via the first cross unit.

12. The method according to claim 11, wherein, The method further includes: Cross-schedule the fourth signal container to a corresponding fourth conversion unit via the first cross unit; The fourth conversion unit is used to map the fourth signal container to the OTU.

13. The method according to claim 11, wherein, The first cross unit is an optical transport network OTN cross board or a cell switching device.

14. The method according to claim 11, wherein, The first type of signal container is one of the following: Fine-grained optical transport network fgOTN frame; Or, Optical service unit OSU.

15. The method according to claim 11, wherein, The second type of signal container is one of the following: Optical data unit ODUk, k = 0, 1 or 2; Flexible optical data unit ODUflex; Cell.

16. The method according to claim 11, wherein, The client signal is a client signal with a transmission rate less than 1.25G.

17. A communication device, comprising: One or more processors; A memory storing one or more programs, which when executed by the one or more processors cause the one or more processors to implement the signal transmission method according to any one of claims 10-16.

18. A computer-readable storage medium storing a computer program, which when executed by a processor implements the signal transmission method according to any one of claims 10-16.

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