KR102468305B1 - Optical transmission system device, conversion unit, conversion method and storage medium - Google Patents

Abstract

The present application discloses an optical transmission system device, a conversion unit, a conversion method and a storage medium, wherein the conversion unit maps SDH format client-side service during a cross-scheduling process from client-side service to line-side. convert the scheduling units into optical transport network OTN scheduling units; During the cross-scheduling process from line-side service to client-side, it is to convert OTN scheduling units mapping OTN format line-side services to SDH scheduling units.

Description

Optical transmission system device, conversion unit, conversion method and storage medium

This application is filed based on a Chinese patent application with application number 201810705935.8 and an application date of June 26, 2018, and claims priority to the Chinese patent application, all contents of which are incorporated herein by reference. are cited

This application relates to the field of communication technology, but is not limited to the field of communication technology, and in particular relates to an optical transmission system device, a conversion unit, a conversion method and a storage medium.

In an optical transport network system, an Optical Transport Network (OTN) optical transport system and a Synchronous Digital Hierarchy (SDH) optical transport system are two independent optical transport systems.

Optical transport system devices mainly handle Ethernet services. Here, the scheduling unit of the SDH optical transmission system device is a Virtual Container (VC), and as the speed of Ethernet service increases, it becomes difficult for the VC to install the high-speed Ethernet service, so the use of the SDH optical transmission system device is large. will be limited The scheduling unit of OTN optical transmission system devices is ODUn, which is very suitable for installing various high-speed Ethernet services, so all current optical transmission system devices are basically OTN optical transmission system devices. However, some users still want OTN optical transmission system devices to implement some functions of SDH optical transmission system devices, and SDH optical transmission system devices still have distinct advantages in processing low-speed Ethernet services, so OTN and SDH optical transmission devices There is a demand for an OTN/SDH hybrid optical transmission system device capable of simultaneously supporting the functions of the device. Here, ODU is an abbreviation of Optical Channel Data Unit, and represents an optical channel data unit, and n represents a speed level.

A method of implementing the OTN/SDH hybrid optical transmission system device includes a method of hybrid networking in which the SDH optical transmission device and the OTN optical transmission device are combined, and a method of configuring an OTUk hybrid line board in the OTN optical transmission device. In the scheme of hybrid networking in which an SDH optical transmission device and an OTN optical transmission device are combined, the device requires a plurality of boards, and the boards of different devices also need to go through optical fiber transmission; In the case of the hybrid line board scheme, it is necessary to develop various bandwidths dedicated to the OTUk hybrid line board supporting VC cross-scheduling, and the types of developed hardware are diverse, and the difficulty of hardware development increases compared to the general OTUk line board. Here, OTU is an abbreviation of Optical Transform Unit, and represents an optical conversion unit, and k represents a speed level. Therefore, to the problems of the above-described OTN/SDH hybrid optical transmission system device, a simple and efficient solution has not yet been proposed.

The technical problem to be solved by the present application is to provide an optical transmission system device, a conversion unit, a conversion method, and a storage medium.

The conversion unit of the optical transmission system device in the embodiment of the present application, during the cross-scheduling process from the client-side service to the line-side, converts the SDH scheduling unit mapping the synchronous digital layer (SDH) format client-side service to the optical transmission network OTN scheduling convert to units; During the cross-scheduling process from line-side service to client-side, convert OTN scheduling units mapping OTN format line-side services to SDH scheduling units.

The light transmission system device in the embodiment of the present application includes a crossing unit and the above-mentioned conversion unit;

the crossover unit cross-schedules the OTN scheduling unit converted by the conversion unit to the OTN line-side unit during a cross-scheduling process from client-side service to line-side; and cross-scheduling the SDH scheduling unit converted by the conversion unit to the SDH client-side unit during a process of cross-scheduling from line-side service to client-side.

The conversion method of the optical transmission system device in the embodiment of the present application,

converting SDH scheduling units that map synchronous digital layer (SDH) format client-side services to optical transport network OTN scheduling units during a cross-scheduling process from client-side service to line-side; and

During the cross-scheduling process from line-side service to client-side, converting OTN scheduling units mapping OTN format line-side services to SDH scheduling units.

The optical transmission system device in the embodiment of the present application includes a memory and a processor, and a conversion program is stored in the memory, and the processor executes the conversion program to complete the steps of the conversion method of the optical transmission system device described above. implement

A conversion program is stored in the readable storage medium in the embodiment of the present application, and the conversion program is executed by at least one processor to implement the steps of the conversion method of the optical transmission system device described above.

Each embodiment of the present application implements a cross-scheduling function with an SDH scheduling unit in an OTN optical transmission system, effectively reducing the type and difficulty of hardware development, eliminating intermediate optical fiber transmission, and effectively reducing the network level, Effectively improve the flexibility of cross-system scheduling.

1 is a hybrid networking diagram of an OTN optical transmission system device and an SDH optical transmission system device.
2 is a block diagram of a system implementing a VC crossing function by configuring a hybrid line board in an OTN device.
3 is a structural schematic diagram of an optical transmission system device in an embodiment of the present application.
4 is a structural schematic diagram of an optional light transmission system device in an embodiment of the present application.
5 is a structural schematic diagram of another optional light transmission system device in an embodiment of the present application.
6 is a structural schematic diagram of another optional light transmission system device in an embodiment of the present application.
7 is a service flow diagram when a conversion unit in an embodiment of the present application does not need to support VC-12 cross scheduling;
8 is a service flow diagram when a conversion unit in an embodiment of the present application needs to support VC-12 cross scheduling;
9 is a flowchart of a conversion method of an optical transmission system device in an embodiment of the present application.
10 is a structural schematic diagram of another optical transmission system device in an embodiment of the present application.

SDH optical transmission system device configuration includes STM (Synchronous Transfer Module)-N (N=1, 4, 16, 64, 256) access board, VC cross board and line STM-M (M=16, 64, 256) board is included, where N and M represent the speed levels. The service processing method is that the client STM-N service is accessed through the client STM-N access board, uses VC-4/VC-12 as a scheduling unit and transmits it to the VC cross board, and the VC cross board is the higher-order VC cross (VC -4 as the scheduling unit) and low-order VC crossing (using VC-12 as the scheduling unit), the cross-scheduled VC is transmitted to the line STM-M board to form a line STM-M transmission, wherein It is a processing path from client STM-N service to line STM-M service, and the SDH optical transmission system device can also complete processing from line STM-M service to client STM-N service at the same time.

The configuration of the SDH service processing path in the OTN optical transport system device is the client STM-N (N=1, 4, 16, 64, 256) access board, ODU (Optical Channel Data Unit) crossing board and line It includes an Optical Transform Unit (OTUk) (k=1, 2, 3, 4) board, and the service processing method is that the client STM-N service is accessed via the client STM-N access board, and ODUn ( n = 0, 1, 2, 3, 4), transmitted to the ODU cross board in the manner of ODUn to perform cross scheduling, and finally transmitted to the line OTUk board to form line OTUk transmission. Here, the mapping from STM-N to ODUn is a one-to-one relationship, that is, one STM-N is converted to one ODUn. The above is the processing path from the client STM-N service to the line OTUk service, and the OTN optical transmission system device can also complete the processing from the OTUk service to the client STM-N service at the same time.

In summary, both the SDH optical transmission system device and the OTN optical transmission system device process access of STM-N services, but there is a very large difference in the processing method, the biggest difference being that the cross-scheduling service format is different, The service format of SDH optical transmission system device cross-scheduling is VC; The service format of OTN optical transmission system device cross-scheduling is ODUn, SDH services are mapped to ODUn, and ODUn is used as a scheduling unit so that OTN optical transmission system devices implement cross-scheduling for SDH services.

The service mainly handled by the related optical transmission system device is Ethernet service, and the scheduling unit of SDH optical transmission system device is VC. Since the use of optical transmission system devices is greatly restricted, and the scheduling unit of OTN optical transmission system devices is ODUn, which is very suitable for installing various Ethernet services, currently all optical transmission system devices are basically OTN optical transmission system devices, but some Users still want OTN optical transmission system devices to implement some functions of SDH optical transmission system devices, and SDH optical transmission system devices still have a clear advantage in handling low-speed Ethernet services, so OTN and SDH optical transmission devices function There is a demand for an OTN/SDH hybrid optical transmission system device capable of simultaneously supporting

The OTN/SDH hybrid optical transmission system device is shown in FIG. 1, the optical transmission system device has both VC and ODUn service scheduling functions, and the system includes an SDH STM-N client access board and an SDH STM-M line board, OTN STM-N access board, and OTN OTUk line board at the same time. STM-N services are accessed via the SDH STM-N access board, cross-scheduled to the VC via the SDH cross board, and then transferred to the SDH STM-M line board, then STM-M output by the SDH STM-M line board. The signal is accessed via fiber optic to the OTN STM-N access board, then the scheduling of ODUn is implemented via the OTN cross board and output to the OTN OTUk line board.

In the OTN/SDH hybrid optical transmission system device, to implement conversion from SDH STM-N service to OTUk service, it is necessary to go through 4 boards, and in the middle it is also transmitted through optical fiber, reducing the number of boards passing through , there is one further system implementation that employs an OTUk hybrid line board configuration as shown in FIG. 2 to eliminate intermediate fiber transmission.

The OTUk hybrid line board can be configured to perform cross scheduling over the ODUn lower backplane, and can also be configured to perform cross scheduling over the VC-4/VC-12 lower backplane, and SDH STM-N access boards in the system. OTN STM-N access board can also be installed, where the SDH STM-N access board is the VC bottom backplane, implements scheduling via crossover board, and VC crossover via crossover board with OTUk hybrid line board. scheduling, OTN STM-N access board as ODUn lower backplane, can implement cross scheduling of ODUn through cross board with OTUk hybrid line board, in this way SDH STM-N access board and OTUk hybrid line board Only with the cooperation of the board, all functions of cross-scheduling from STM-N to OTUk via VC can be implemented, while also the OTN cross-scheduling function can be implemented through the cooperation of OTN STM-N access board and OTUk hybrid line board.

The aforementioned OTUk hybrid line board implements the functions of SDH STM-N access and VC cross-scheduling in OTN devices, reduces the number of required boards compared to the existing SDH service path, and combines the SDH STM-M line board with the OTN STM- Although the optical fiber connection between the N client boards has been removed, the OTUk hybrid line board is more difficult to implement than the general OTUk line board because the VC scheduling function is added compared to the general OTUk line board, and a special board must be developed separately. At the same time, compared with the general OTUk line board, the OTUk hybrid line board not only realizes the bandwidth limit of the OTUk hybrid line board, but also the OTUk hybrid line board takes different values according to the k of the OTUk, and due to the difference in line transmission distance, various OTUk It is necessary to develop a hybrid line board.

This application provides an optical transmission system device, conversion unit, conversion method and storage medium, and by developing a VC/ODU conversion unit, flexible VC cross-scheduling between SDH STM-N access board and general OTUk line board in OTN optical transmission system implement the function The embodiment of the present application reduces the type of single board compared to the method of configuring the OTUk hybrid line board, and the complexity of the VC / ODU conversion unit is relatively low, thereby reducing the development difficulty, while at the same time providing a wider lower backplane compared to the hybrid board Easily implement VC bandwidth. The present application is described in further detail by combining the figures and examples below. It should be understood that the specific embodiments described herein are only for interpreting the present application and are not intended to limit the present application.

In the following description, suffixes such as "module", "member" or "unit" used to indicate elements are only for facilitating the description of the present application, and do not themselves have a special meaning. Therefore, "module", "member" or "unit" can be used in combination.

Prefixes such as "first" and "second" to distinguish elements are only for facilitating description of the present application, and do not themselves have a special meaning.

An embodiment of the present application provides a conversion unit of an optical transmission system device, and as shown in FIGS. 3 to 6 , the conversion unit 5 performs, during a cross-scheduling process from client-side service to line-side, synchronous digital Convert SDH scheduling units that map hierarchical (SDH) format client-side services to optical transport network OTN scheduling units; During the cross-scheduling process from line-side service to client-side, convert OTN scheduling units mapping OTN format line-side services to SDH scheduling units.

The SDH scheduling unit for mapping the synchronous digital layer (SDH) format client-side service is an SDH scheduling unit and is a scheduling unit for scheduling and transmitting the SDH format client-side service.

The OTN scheduling unit for mapping the OTN format line-side service is an OTN scheduling unit, and is a scheduling unit for scheduling and transmitting an OTN-format line-side service.

Here, the SDH scheduling unit includes one of a virtual container (VC), a VC cell, and a VC of each dimension; An OTN scheduling unit includes one of an Optical Channel Data Unit (ODU) and an ODU cell. Here, the conversion unit may adopt the form of a conversion single board.

By using the conversion unit 5 in the embodiment of the present application, the client-side service in SDH format is transmitted from the access to the upper OTUk line, reducing the elapsed board count and eliminating the intermediate fiber transmission, thereby increasing the network level decrease; Compared to the OTN/SDH hybrid optical transmission system device composed of the OTUk hybrid line board shown in Fig. 2, the client-side SDH STM-N access board can cooperate with any line-side general OTUk line board to implement the VC cross-scheduling function, , is no longer limited to cross-scheduling with a dedicated hybrid line board, improving the flexibility of system cross-scheduling, and in the system shown in Figure 2, the hybrid line-side single board OTUk optical port bandwidth and backplane ODUk, VC bandwidth are limited overcome the problem of receiving; At the same time, there is no need to develop various types of hybrid line boards according to actual needs, reducing the type and difficulty of hardware development.

In some embodiments, when the SDH scheduling unit is a virtual container (VC) and the OTN scheduling unit is an ODU, the conversion unit 5 performs, during a cross-scheduling process from client-side service to line-side, SDH format client-side Convert VC mapping services to ODU; During the cross scheduling process from line-side service to client-side, convert the ODU mapping the OTN format line-side service to VC.

In some embodiments, when the SDH scheduling unit is a VC cell and the OTN scheduling unit is an ODU cell, the conversion unit 5 maps the SDH format client-side service during a cross-scheduling process from client-side service to line side. converts a VC cell to a VC, converts the converted VC to an ODU, and converts the converted ODU to an ODU cell; During a cross-scheduling process from line-side service to client-side, convert ODU cells mapping the OTN format line-side service to ODUs, convert converted ODUs to VCs, and convert converted VCs to VC cells.

In some embodiments, when the SDH scheduling unit is a primary VC and a secondary VC, and the OTN scheduling unit is an ODU, the conversion unit 5, during the cross scheduling process from client side service to line side, SDH format Demapping the primary VC mapping the client-side service to obtain the secondary VC, performing VC intersection on the secondary VC obtained by demapping, mapping the VC-crossed secondary VC to obtain the primary VC, mapping Converting the primary VC obtained by doing so into ODU; During the cross-scheduling process from the line-side service to the client-side, the ODU mapping the OTN format line-side service is converted into a primary VC, demapped from the converted primary VC to obtain a secondary VC, and the demapping 2 and perform VC intersection on the primary VC, and map the VC-crossed secondary VC to obtain the primary VC. Here, the first order VC can be regarded as a higher order VC such as VC-4, and the second order VC can be regarded as a lower order VC such as VC-12. In other words, the ODUs mapping the OTN format line-side service are converted into higher-order VCs, the higher-order VCs are demapped into lower-order VCs, the low-order VCs are re-mapped after passing through VC crossings to obtain higher-order VCs, and so on. Implement scheduling and low-order VC cross-scheduling, and the low-order VC (in the transform unit) is mapped again after going through VC crossover to obtain a higher-order VC, and the higher-order VC is converted back to ODU.

An embodiment of the present application provides a light transmission system device, and as shown in FIG. 3 , the light transmission system device includes a crossing unit 3 and a conversion unit 5;

The conversion unit 5 converts an SDH scheduling unit mapping a synchronous digital layer (SDH) format client-side service into an optical transport network OTN scheduling unit during a cross-scheduling process from client-side service to line-side; During the cross-scheduling process from line-side service to client-side, convert OTN scheduling units mapping OTN format line-side services to SDH scheduling units.

During the cross-scheduling process from client-side service to line-side, the crossing unit 3 schedules the SDH scheduling unit of the client-side service with the conversion unit, and the OTN scheduling unit converted by the conversion unit is converted to the OTN line-side unit. cross-scheduling with; During the cross-scheduling process from line-side service to client-side, schedule OTN scheduling units of line-side services to the conversion unit, and cross-schedule SDH scheduling units converted by the conversion unit to SDH client-side units.

Here, the SDH scheduling unit includes one of a virtual container (VC), a VC cell, and a VC of each dimension; An OTN scheduling unit includes one of an Optical Channel Data Unit (ODU) and an ODU cell; The SDH format is the synchronous transmission module SDH STM-N of different rate levels, and the OTN format is the optical channel transmission unit OTN OTUk of different rate levels. Here, the conversion unit may take the form of a conversion single board, and the crossing unit may take the form of a crossing board.

The embodiment of the present application implements the VC cross-scheduling function between the SDH STM-N access board and the general OTUk line board, so that all OTUk line boards implement the VC cross-scheduling function with the SDH STM-N access board, so that the VC By avoiding the development of various dedicated OTUk hybrid line boards supporting cross-scheduling, reducing the type of hardware developed, making the network structure of the system flatter, and making transmission and cross-scheduling more efficient and flexible, reducing system hardware procurement costs and effectively reduce network maintenance costs.

In some embodiments, the crossover unit 3 also cross-schedules an OTN scheduling unit mapping a client-side OTN service to the OTN line-side unit during a cross-scheduling process from client-side service to line-side; During the cross-scheduling process from line-side service to client-side, it is configured to cross-schedule OTN scheduling units that map OTN format line-side services to OTN client-side units.

In some embodiments, the optical transmission system device further includes the SDH client-side unit 2, the OTN client-side unit 1 and the OTN line-side unit 4;

The SDH client-side unit 2 demaps SDH format client-side services to obtain SDH scheduling units during cross-scheduling process from client-side services to line-side; During cross-scheduling process from line-side service to client-side, configured to map cross-scheduled SDH scheduling units to obtain SDH format client-side service;

The OTN client-side unit 1 maps the client-side OTN service to obtain an OTN scheduling unit during the cross-scheduling process from client-side service to line-side; During cross-scheduling process from line-side service to client-side, the cross-scheduled OTN scheduling unit is demapped to obtain OTN format client-side service;

The OTN line-side unit 4 multiplexes cross-scheduled OTN scheduling units into line-side services in OTN format during the cross-scheduling process from client-side service to line-side; During the cross-scheduling process from line-side service to client-side, the OTN format line-side service is configured to demultiplex to obtain an OTN scheduling unit containing the client-side service.

In some embodiments, when the SDH scheduling unit is a VC cell and the OTN scheduling unit is an ODU cell, the conversion unit 5 maps the SDH format client-side service during a cross-scheduling process from client-side service to line side. converts a VC cell to a VC, converts the converted VC to an ODU, and converts the converted ODU to an ODU cell; During a cross-scheduling process from line-side service to client-side, convert ODU cells mapping the OTN format line-side service to ODUs, convert converted ODUs to VCs, and convert converted VCs to VC cells.

Specifically, as shown in FIG. 3 , the optical transmission system device in the embodiment of the present application may implement a VC crossing function in the OTN optical transmission system, and the optical transmission system device includes the OTN client-side unit 1, SDH It includes a client-side unit 2, a crossover unit 3, an OTN line-side unit 4 and a conversion unit 5; Cross unit 3 is connected to each other unit. Here, the cross unit 3 can implement cross scheduling based on ODUk (k = 0, 1, 2, 3, 4) and VC (VC-4, VC-3 and VC-12), and the conversion unit 5 ) can implement conversions of ODUk (k = 0, 1, 2, 3, 4) and VC (VC-4, VC-3 and VC-12). As can be seen from the figure, the SDH STM-N (N=1, 4, 16, 64, 256) service accessed by the SDH client-side unit completes the VC crossover through the crossover unit 3, then the conversion unit VC (VC-4, VC-3 and VC-12) through 601 to ODUk (k = 0, 1, 2, 3, 4) (e.g., VC is mapped to obtain STM-N, then STM- N is mapped to ODUk (obtaining k=0, 1, 2, 3, 4), then cross-scheduled by the crossover unit 3 to the OTN line-side unit; In the opposite direction, cross-scheduling from the line-side unit OTUk service to the client unit SDH STM-N service can be completed. ) to VC (VC-4, VC-3 and VC-12) (e.g. demapping ODUk to get STM-N, then demapping STM-N to get VC).

The conversion unit 5 in the embodiments of the present application includes, but is not limited to, conversion from VC to ODUk, for example, by supporting a crossover function of a low order VC-12, in an OTN system that supports only high-order VC crossing, in a low order Implements intersection of VC-12.

Here, each unit may adopt the form of a single board, namely, an OTN client-side unit (1), an SDH client-side unit (2), a cross unit (3), an OTN line-side unit (4) and a conversion unit. (5) can be expressed as OTN client-side single board, SDH client-side single board, crossover single board, OTN line-side single board and conversion single board. Here, SDH format client-side services can also be expressed as client-side SDH services, and OTN format service-side services and OTN-format client-side services can also be expressed as service-side OTN services and client-side OTN services, respectively.

Compared with the OTN/SDH hybrid optical transmission system device shown in Fig. 1, in the device in the embodiment of the present application, due to the use of the conversion unit 5, the SDH client-side service is transmitted from the access to the upper OTUk line, , reducing the number of elapsed boards and eliminating the intermediate fiber optic transmission, thereby reducing the network level; Compared to the OTN/SDH hybrid optical transmission system device composed of the OTUk hybrid line board shown in Fig. 2, the client-side SDH STM-N access board can cooperate with any line-side general OTUk line board to implement the VC cross-scheduling function, , is no longer limited to cross-scheduling with a dedicated hybrid line board, improving the flexibility of system cross-scheduling, and in the system shown in Figure 2, the hybrid line-side single board OTUk optical port bandwidth and backplane ODUk, VC bandwidth are limited overcome the problem of receiving; At the same time, there is no need to develop various types of hybrid line boards according to actual needs, reducing the type and difficulty of hardware development.

An embodiment of the present application provides an optical transmission system device, as shown in FIG. 4 , the optical transmission system device includes an OTN client-side unit 1, an SDH client-side unit 2, a crossover unit 3, further comprising an OTN line-side unit 4 and a conversion unit 5; Here, the crossing unit 3 is a double-plane crossing unit, and when the SDH scheduling unit is a virtual container (VC) and the OTN scheduling unit is an ODU, the conversion unit 5 specifically, in the client-side service, During the cross-to-side scheduling process, convert VC mapping SDH format client-side service to ODU; During the cross-scheduling process from line-side service to client-side, it is used to convert ODU mapping the OTN format line-side service to VC.

Specifically, the OTN client-side unit 1 provides access of OTUk (k=1, 2, 3, 4) services at different rate levels, ODUk (k=0, 1, 2, 3, 4) and access of OTN STM-N (N=1, 4, 16, 64, 256) services, mapping/demapping functions from STM-N to ODUn. complete access to OTN services; SDH client-side unit 2 completes mapping/demapping functions of SDH STM-N (N=1, 4, 16, 64, 256) and VC (VC-4, VC-3 and VC-12); the central cross unit 3 is a double planar central cross unit; The conversion unit 5 implements conversion of ODUk (k=0, 1, 2, 3, 4) and VC (VC-4, VC-3 and VC-12). The SDH STM-N (N=1, 4, 16, 64, 256) service accessed by the SDH client-side unit 201 completes VC crossing through the dual-plane central crossing unit 302, then the conversion unit ( 5) converts VC (VC-4, VC-3 and VC-12) to ODUk (k=0, 1, 2, 3, 4) and back to the OTN line via the dual flat central cross unit (3) By cross-scheduling to the side unit 4, it completes the VC cross-scheduling between the client unit SDH STM-N service and any OTUk line single board on the line side. The reverse direction can complete the VC cross-scheduling between the client-side SDH STM-N service board on the line-side OTUk single board.

An embodiment of the present application provides an optical transmission system device, as shown in FIG. 5 , the optical transmission system device includes an OTN client-side unit 1, an SDH client-side unit 2, a crossover unit 3, comprising an OTN line-side unit 4 and a conversion unit 5; Here, the crossing unit may be expressed as a center cell crossing unit, and the conversion unit may be expressed as a cell conversion unit, and when the SDH scheduling unit is a VC cell and the OTN scheduling unit is an ODU cell, the conversion unit (5 ) Specifically, during the cross-scheduling process from the client-side service to the line-side, converts the VC cell mapping the SDH format client-side service to VC, converts the converted VC to ODU, converts the converted ODU to ODU cell, ; During the cross-scheduling process from line-side service to client-side, it is used to convert ODU cells mapping the OTN format line-side service to ODUs, convert converted ODUs to VCs, and convert converted VCs to VC cells.

In some embodiments, the OTN client-side unit 1 provides access of OTUk (k=1, 2, 3, 4) services of different rate levels, OTUk (k=1, 2, 3, 4) and ODUk (k= 0, 1, 2, 3, 4) mapping/demapping, conversion of ODUk and ODU cells (CELL(ODU)), and access of OTN STM-N (N=1, 4, 16, 64, 256) services , complete access of OTN services such as STM-N to ODUn mapping/demapping, conversion of ODUn and ODU cells (CELL(ODU)); SDH client-side unit 2 provides access to SDH STM-N (N=1, 4, 16, 64, 256) services, mapping/ complete demapping, conversion of VC and VC cell (CELL(VC)); The central cell crossing unit 3 converts ODU cells (CELL(ODU)) based on ODUk (k=0, 1, 2, 3, 4) and based on VC (VC-4, VC-3 and VC-12). Concurrently complete the conversion function of the VC cell (CELL(VC)); The cross scheduling unit of the line side unit 4 is an ODUk cell; The cell conversion unit 5 is an ODU cell (CELL(ODU)) based on ODUk (k = 0, 1, 2, 3, 4) and a VC cell based on VC (VC-4, VC-3 and VC-12). (CELL(VC)), in cooperation with the central cell crossing unit 3, any of the line-side units in the client-side SDH STM-N (N=1, 4, 16, 64, 256) service. Implements VC cross-scheduling between OTUk line single boards.

An embodiment of the present application provides an optical transmission system device, as shown in FIG. 5 , the optical transmission system device includes an OTN client-side unit 1, an SDH client-side unit 2, a crossover unit 3, comprising an OTN line-side unit 4 and a conversion unit 5; In some embodiments, when the SDH scheduling unit is a primary VC and a secondary VC, and the OTN scheduling unit is an ODU, the conversion unit 5 may specifically, during a cross-scheduling process from client-side service to line-side: Demapping the primary VC mapping the SDH format client-side service to obtain the secondary VC, performing VC crossing on the secondary VC obtained by demapping, and mapping the VC-crossed secondary VC to obtain the primary VC , converting the primary VC obtained by mapping into ODU; During the cross-scheduling process from the line-side service to the client-side, the ODU mapping the OTN format line-side service is converted into a primary VC, demapped from the converted primary VC to obtain a secondary VC, and the demapping 2 It is used to perform VC intersection on the primary VC, map the VC-crossed secondary VC to obtain the primary VC, and convert the primary VC obtained by mapping to ODU. Here, the primary VC may be VC-4, and the secondary VC may be VC-12.

For example, conversion unit 5 in the embodiment of the present application supports cross scheduling of VC-12, supports only VC-4 scheduling and the lower backplane of SDH client-side unit 2 equipped with only VC-4. It is applied to a system with a central crossover unit 3 that implements the function of crossover scheduling of VC-12. Here, the conversion unit 5 may include a plurality of VC-4 cross-scheduling modules 601, a VC-12 cross-scheduling module 602 and a VC-4 to ODUK conversion module 603, The conversion unit 5 of the embodiment is such that if the device does not need to cross-schedule VC-12, and the service flow is as shown in Fig. 7, the VC-4 from the crossover unit 3 is the VC-4 scheduling module Scheduled by VC-4 to ODUk conversion module 603 by 601, converted to ODUk, and transmitted to the next cross scheduling unit 3; When the device needs to perform cross-scheduling of VC-12, the service flow is as shown in FIG. 12 cross-scheduling module 602 implements VC-12 cross-scheduling, and VC-4 that has passed through VC-12 cross-scheduling is transmitted to VC-4 scheduling module 601 and converted from VC-4 to ODUk module It is scheduled to 603, converted to ODUk, and then transmitted to crossover unit 301.

An embodiment of the present application provides a method for converting an optical transmission system device, and as shown in FIG. 9 , the method for converting an optical transmission system device includes the following steps S101 and S102.

In step S101, during a cross-scheduling process from client-side service to line-side, an SDH scheduling unit mapping a synchronous digital layer (SDH) format client-side service is converted into an optical transport network OTN scheduling unit.

In step S102, during cross-scheduling process from line-side service to client-side, OTN scheduling units mapping OTN format line-side services are converted into SDH scheduling units.

What needs to be explained here is that when the method in the embodiment of the present application is executed, the sequence of steps S101 and S102 can be adjusted according to actual application scenarios. The optical transmission system device in the embodiments of the present application is any one of the above optical transmission system devices in any of the foregoing embodiments.

In some embodiments, when the SDH scheduling unit is a virtual container (VC) and the OTN scheduling unit is an ODU, during the cross-scheduling process from the client-side service to the line-side, a synchronous digital layer (SDH) format client-side service is provided. Converting the SDH scheduling unit to be mapped into an optical transport network OTN scheduling unit,

During the cross-scheduling process from client-side service to line-side, converting VC mapping SDH format client-side service to ODU;

During the cross-scheduling process from the line-side service to the client-side, converting an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit,

During the cross-scheduling process from line-side service to client-side, converting the ODU mapping the OTN format line-side service to VC.

In some embodiments, when the SDH scheduling unit is a VC cell and the OTN scheduling unit is an ODU cell, SDH mapping a synchronous digital layer (SDH) format client-side service during a cross-scheduling process from the client-side service to the line side. Converting the scheduling unit into an optical transport network OTN scheduling unit,

during the cross-scheduling process from client-side service to line-side, converting VC cells mapping SDH format client-side services to VCs, converting converted VCs to ODUs, and converting converted ODUs to ODU cells;

During the cross-scheduling process from the line-side service to the client-side, converting an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit,

during the cross-scheduling process from line-side service to client-side, converting an ODU cell mapping the OTN format line-side service to an ODU, converting the converted ODU to a VC, and converting the converted VC to a VC cell; .

In some embodiments, when the SDH scheduling unit is a primary VC and a secondary VC, and the OTN scheduling unit is an ODU, during the cross-scheduling process from the client-side service to the line-side, a synchronous digital layer (SDH) format client-side The step of converting the SDH scheduling unit mapping the service into the optical transport network OTN scheduling unit,

During the cross-scheduling process from the client-side service to the line-side, the primary VC mapping the SDH format client-side service is demapped to obtain a secondary VC, VC crossing is performed on the secondary VC obtained by demapping, and Map the secondary VC to obtain the primary VC; converting the primary VC obtained by mapping into ODU;

During the cross-scheduling process from the line-side service to the client-side, converting an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit,

During the cross-scheduling process from the line-side service to the client-side, the ODU mapping the OTN format line-side service is converted into a primary VC, demapped from the converted primary VC to obtain a secondary VC, and the demapping 2 and mapping the primary VC to obtain the primary VC.

An embodiment of the present application provides an optical transmission system device, and as shown in FIG. 10 , the optical transmission system device includes a memory 10 and a processor 12, and the memory 10 includes a conversion program. stored, and the processor 12 executes the conversion program to implement the steps of any one method according to any of the embodiments described above.

Embodiments of the present application provide a readable storage medium, in which a conversion program is stored, and the conversion program is executed by at least one processor to perform any one method according to any of the above-described embodiments. implement the steps

The readable storage medium of the embodiments of the present application may be RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, mobile hard disk, CD-ROM, or any other form of storage medium known in the art. can A storage medium can be coupled to the processor to cause the processor to read information from, write information to, and/or to the storage medium; Alternatively, the storage medium may be a constituent part of a processor. A processor and storage medium may be located in an application specific integrated circuit.

The above-described specific embodiments have further specifically described the purpose, technical solution, and effect of the present application of the present application, and the above-described information is merely specific embodiments of the present application, and is not intended to limit the scope of protection of the present application. It should be understood that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall all fall within the protection scope of this application.

Claims (15)

As a conversion unit of an optical transmission system device,
The conversion unit converts an SDH scheduling unit mapping a synchronous digital layer (SDH) format client-side service into an optical transport network OTN scheduling unit during a cross-scheduling process from client-side service to line-side; A conversion unit of an optical transmission system device, characterized in that it is configured to convert an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit during a cross-scheduling process from line-side service to client-side. According to claim 1,
The SDH scheduling unit includes one of a virtual container (VC), a VC cell, and a VC of each dimension; The OTN scheduling unit comprises one of an optical channel data unit (ODU) and an ODU cell. According to claim 1,
When the SDH scheduling unit is a virtual container (VC) and the OTN scheduling unit is an optical channel data unit (ODU), the conversion unit converts SDH format client-side service during a cross-scheduling process from client-side service to line side. convert mapping VC to ODU; The conversion unit of the optical transmission system device according to claim 1 , configured to convert ODU mapping the OTN format line-side service to VC during a cross-scheduling process from line-side service to client-side. According to claim 1,
When the SDH scheduling unit is a virtual container (VC) cell and the OTN scheduling unit is an optical channel data unit (ODU) cell, the conversion unit, during the cross-scheduling process from client-side service to line-side, SDH format client-side service Converting a VC cell mapping to VC into a VC, converting the converted VC into an ODU, and converting the converted ODU into an ODU cell; During a cross-scheduling process from line-side service to client-side, an ODU cell mapping the OTN format line-side service is converted to an ODU, the converted ODU is converted to a VC, and the converted VC is converted to a VC cell. A conversion unit of an optical transmission system device that According to claim 1,
When the SDH scheduling unit is a Primary Virtual Container (VC) and a Secondary Virtual Container (VC), and the OTN scheduling unit is an Optical Channel Data Unit (ODU), the conversion unit performs a crossover from a client side service to a line side. During the scheduling process, the primary VC mapping the SDH format client-side service is demapped to obtain the secondary VC, VC crossing is performed on the secondary VC obtained by demapping, and the VC-crossed secondary VC is mapped to obtain 1 obtaining a secondary VC, and converting the primary VC obtained by mapping into an ODU; During the cross-scheduling process from the line-side service to the client-side, the ODU mapping the OTN format line-side service is converted into a primary VC, demapped from the converted primary VC to obtain a secondary VC, and the demapping 2 A conversion unit of an optical transmission system device, characterized in that it is configured to perform VC crossover on the secondary VC, and map the VC-crossed secondary VC to obtain the primary VC. As an optical transmission system device,
The optical transmission system device includes a crossing unit and a conversion unit according to any one of claims 1 to 5;
the crossover unit cross-schedules the OTN scheduling unit converted by the conversion unit to the OTN line-side unit during a cross-scheduling process from client-side service to line-side; and cross-scheduling the SDH scheduling unit converted by the conversion unit to the SDH client-side unit during a cross-scheduling process from line-side service to client-side. According to claim 6,
The crossover unit also cross-schedules an OTN scheduling unit mapping a client-side OTN service to the OTN line-side unit during a cross-scheduling process from client-side service to line-side; During a cross-scheduling process from line-side service to client-side, cross-scheduling an OTN scheduling unit mapping an OTN format line-side service to an OTN client-side unit. According to claim 7,
the optical transmission system device further includes the SDH client-side unit, the OTN client-side unit and the OTN line-side unit;
The SDH client-side unit demaps the SDH format client-side service to obtain an SDH scheduling unit during cross-scheduling process from client-side service to line-side; During cross-scheduling process from line-side service to client-side, configured to map cross-scheduled SDH scheduling units to obtain SDH format client-side service;
The OTN client-side unit maps the client-side OTN service to obtain an OTN scheduling unit during the cross-scheduling process from the client-side service to the line side; during cross-scheduling process from line-side service to client-side, configured to obtain OTN client-side service by demapping from the cross-scheduled OTN scheduling unit;
the OTN line-side unit multiplexes cross-scheduled OTN scheduling units into line-side services in OTN format during cross-scheduling process from client-side service to line-side; During the cross scheduling process from the line-side service to the client side, demultiplexing from the OTN format line-side service to obtain an OTN scheduling unit. According to claim 8,
The SDH format is a synchronous transmission module of different speed levels, and the OTN format is an optical channel transmission unit of different speed levels. As a conversion method of an optical transmission system device,
converting SDH scheduling units that map synchronous digital layer (SDH) format client-side services to optical transport network OTN scheduling units during a cross-scheduling process from client-side service to line-side; and
During a cross-scheduling process from line-side service to client-side, converting an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit. According to claim 10,
When the SDH scheduling unit is a virtual container (VC) and the OTN scheduling unit is an optical channel data unit (ODU), during the cross-scheduling process from the client-side service to the line-side, a synchronous digital layer (SDH) format client-side service The step of converting the SDH scheduling unit mapping to the optical transport network OTN scheduling unit,
During the cross scheduling process from client side service to line side, converting VC mapping SDH format client side service to ODU;
During the cross-scheduling process from the line-side service to the client-side, converting an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit,
and converting the ODU mapping the OTN format line-side service to VC during a cross-scheduling process from line-side service to client-side. According to claim 10,
When the SDH scheduling unit is a virtual container (VC) cell and the OTN scheduling unit is an optical channel data unit (ODU) cell, during the cross-scheduling process from the client-side service to the line-side, the synchronous digital layer (SDH) format client-side The step of converting the SDH scheduling unit mapping the service into the optical transport network OTN scheduling unit,
during the cross-scheduling process from client-side service to line-side, converting VC cells mapping SDH format client-side services to VCs, converting converted VCs to ODUs, and converting converted ODUs to ODU cells;
During the cross-scheduling process from the line-side service to the client-side, converting an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit,
During a cross-scheduling process from line-side service to client-side, converting ODU cells mapping the OTN format line-side service to ODUs, converting converted ODUs to VCs, and converting converted VCs to VC cells. A conversion method of an optical transmission system device, characterized in that. According to claim 10,
When the SDH scheduling unit is a primary virtual container (VC) and a secondary virtual container (VC), and the OTN scheduling unit is an optical channel data unit (ODU), during the cross-scheduling process from the client-side service to the line-side, Converting an SDH scheduling unit mapping a synchronous digital layer (SDH) format client-side service into an optical transport network OTN scheduling unit,
During the cross-scheduling process from the client-side service to the line-side, the primary VC mapping the SDH format client-side service is demapped to obtain a secondary VC, VC crossing is performed on the secondary VC obtained by demapping, and Map the secondary VC to obtain the primary VC; converting the primary VC obtained by mapping into ODU;
During the cross-scheduling process from the line-side service to the client-side, converting an OTN scheduling unit mapping an OTN format line-side service into an SDH scheduling unit,
During the cross-scheduling process from the line-side service to the client-side, the ODU mapping the OTN format line-side service is converted into a primary VC, demapped from the converted primary VC to obtain a secondary VC, and the demapping 2 A conversion method of an optical transmission system device comprising the step of performing VC crossing on the primary VC and mapping the intersected secondary VC to obtain the primary VC. As an optical transmission system device,
The optical transmission system device includes a memory and a processor, a conversion program is stored in the memory, and the processor executes the conversion program to obtain the optical transmission system device according to any one of claims 10 to 13. An optical transmission system device characterized by implementing the steps of a conversion method. As a readable storage medium,
A conversion program is stored in the storage medium, and the conversion program is executed by at least one processor to implement the steps of the conversion method of an optical transmission system device according to any one of claims 10 to 13. Characterized by a readable storage medium.

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