CN111294669B - OTN (optical transport network) network architecture and scheduling method - Google Patents
OTN (optical transport network) network architecture and scheduling method Download PDFInfo
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Abstract
The embodiment of the invention provides an OTN network architecture and a scheduling method. The network architecture method comprises the following steps: the system comprises a main scheduling ring, at least two groups of networking and user access equipment; the networking comprises service downloading equipment, at least two cascaded convergence rings and an access ring which are sequentially in communication connection; the user access equipment is accessed to the service downloading equipment through the access ring and the convergence ring in sequence, or is accessed to the service downloading equipment through the access ring, the convergence ring and the main scheduling ring in sequence; the main scheduling ring is used for controlling the opening of a route between a convergence ring where the user access equipment is located and the target service downloading equipment when the target service downloading equipment of the user access equipment is the service downloading equipment of the same network. The embodiment of the invention solves the problem that the network architecture of the transmission network in the prior art is difficult to adapt to the increasing broadband requirement.
Description
Technical Field
The embodiment of the invention relates to the technical field of mobile communication, in particular to an OTN (optical transport network) network architecture and a scheduling method.
Background
With the development of mobile communication technology, the increasing speed of broadband services poses a great challenge to the existing transmission networks. A process that an Optical Line Terminal (OLT) device of a passive Optical Access system (Gigabit-Capable PON, GPON) of a Broadband service ascends to a Broadband Remote Access Server (BRAS), and at the present stage, a Packet Transport Network (PTN), an Optical Transport Network (OTN) or a bare fiber is mainly used for carrying; at present, the OTN is only disposed on the backbone convergence layer, and only carries the PTN and a small portion of OLT services on the backbone convergence point, for example, the OLT services like rural broadband services are both carried by the PTN.
Specifically, the network architecture and the service bearer mode of the existing transmission network mainly include the following three parts:
(1) PTN carries:
the PTN dispatches OLT equipment of home wide services to BRAS equipment of convergence equipment, and the BRAS equipment is connected with a core router through convergence end office equipment from a convergence layer to a backbone building; the convergence ring rate is generally 100GE, the PTN ring carries convergence ring services, and is connected to convergence office equipment of the backbone building through a 100GE or 10GE optical port.
(2) The OTN bears:
the OTN dispatches the OLT equipment of the home wide service on the aggregation node to the BRAS equipment of the aggregation point or the end office BRAS equipment through the aggregation ring, and the BRAS service is dispatched to the core router through the aggregation end office equipment in the backbone building on the OTN aggregation ring. The converging ring is typically a 10G or 100G by 40 wave ring.
(3) Carrying bare fibers:
the OLT service is transmitted to the BRAS equipment of the convergence machine room through the optical cable, the maximum optical fiber distance of the OLT equipment is generally 40 kilometers, and the method is suitable for urban areas or rural areas with short distance.
In the prior art, as the bandwidth requirement of the home wide service at the initial stage is relatively small, for example, 1000M (megabyte) per site is average, a PTN backbone convergence adopts a PTN ring at a 100GE level, and the network capacity can meet the home wide service requirement; the OTN only sinks to the convergence layer and is only responsible for the PTN, BRAS and OLT traffic bearers of the convergence layer. And the OTN dispatches BRAS service to the backbone machine building and needs each convergence ring to set up the convergence end office equipment in each backbone machine building, there is no scheduling ability between offices.
The optical fiber resources in urban areas are rich, and bandwidth requirements can be met by loading OLT services to BRAS through bare fibers; and the open broadband in the initial stage of the rural area is less, the occupied fiber core is less, and the requirement that the bare fiber in the rural area bears the OLT service to the sink node can be met temporarily in the initial stage.
However, the requirement for broadband bandwidth changes greatly nowadays, and the existing PTN network architecture, service carrying method, bare fiber carrying method, etc. are difficult to adapt to the service requirement of broadband, and are mainly embodied in the following aspects:
(1) the bandwidth requirement of an optical broadband single user is at least 100M, even 1000M in a downtown area, which is 10 times of the wide bandwidth of the existing home; the PTN ring capacity of the existing convergence ring 100GE is difficult to meet the requirement of at least 10G bandwidth access in the uplink of the OLT;
(2) the home wide service transmission requirements mainly comprise services from an OLT to a BRAS and services from the BRAS to a core router, so that the PTN equipment needs to have the capability of scheduling high-bandwidth services, and the existing PTN networking mode and bandwidth cannot meet the home wide service transmission requirements easily;
(3) when the existing OTN schedules the BRAS service to a backbone building, each convergence ring needs to set a convergence end office device in each backbone building, and the OTN does not have an inter-office scheduling capability.
(4) With the gradual coverage of the optical broadband to rural areas, the bare fiber bearing of the OLT is difficult due to the limitation of fiber core resources of the optical cable in the rural areas.
Disclosure of Invention
The embodiment of the invention provides an OTN network architecture and a scheduling method, which are used for solving the problem that the network architecture of a transmission network is difficult to adapt to the increasing broadband requirement in the prior art.
In one aspect, an embodiment of the present invention provides an OTN network architecture, where the network architecture includes:
the system comprises a main scheduling ring, at least two groups of networking and user access equipment;
the networking comprises service downloading equipment, at least two cascaded convergence rings and an access ring which are sequentially in communication connection;
the user access equipment is accessed to the service downloading equipment through the access ring and the convergence ring in sequence, or is accessed to the service downloading equipment through the access ring, the convergence ring and the main scheduling ring in sequence;
the main scheduling ring is used for controlling the opening of a route between a convergence ring where the user access equipment is located and the target service downloading equipment when the target service downloading equipment of the user access equipment is the service downloading equipment of the same network;
if the target service downloading equipment of the user access equipment is service downloading equipment of different networking networks, controlling to open the route between the convergence ring where the user access equipment is located and the main scheduling ring, and accessing the target service downloading equipment through the main scheduling ring.
In one aspect, an embodiment of the present invention provides a method for scheduling an optical transport network OTN network architecture, where the method is applied to the optical transport network OTN network architecture, and the method includes:
when a target service downloading device of a user access device of an OTN network architecture is a service downloading device of the same network group in the OTN network architecture, controlling to open a route between a convergence ring where the user access device is located and the target service downloading device;
if the target service downloading equipment of the user access equipment is service downloading equipment of different networking networks, controlling to open a route between a convergence ring where the user access equipment is located and a main scheduling ring of the OTN network architecture, so that the user access equipment is accessed to the target service downloading equipment through the main scheduling ring.
On the other hand, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program that is stored in the memory and is executable on the processor, where the processor implements the steps in the scheduling method for the OTN network architecture of the optical transport network when executing the program.
In still another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the scheduling method for an OTN network architecture of an optical transport network.
The OTN network architecture and the scheduling method of the optical transport network provided by the embodiment of the invention realize the hierarchical centralized scheduling of each level of service by establishing the OTN network architecture comprising a main scheduling ring, at least two groups of networking and user access equipment; for the service downloading equipment of the same network, controlling the routing between the convergence ring where the user access equipment is located and the target service downloading equipment to be opened; for the service downloading equipment with different networking target service downloading equipment, the routing between the convergence ring where the user access equipment is located and the main scheduling ring is controlled to be opened, and the service is accessed to the target service downloading equipment through the main scheduling ring, so that the service bearing methods of two scenes are realized, the requirement of large-bandwidth multipoint transmission is met, and the networking flexibility of the network is improved. The embodiment of the invention makes up the defects of the network architecture and the service bearing method of the existing home wide bearing network, and meets the requirements of large bandwidth, flexible scheduling and service protection of home wide services.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an OTN network architecture according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an OTN network architecture of an optical transport network according to a specific example of the embodiment of the present invention;
fig. 3 is a flowchart illustrating a scheduling method of an OTN network architecture according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "an embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrase "in an embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
Fig. 1 shows a flowchart of a scheduling method for an OTN network architecture according to an embodiment of the present invention.
As shown in fig. 1, an OTN network architecture provided in an embodiment of the present invention includes: a main scheduling ring, at least two groups of networking, and a user access device (shown as an OLT in fig. 1);
fig. 1 shows three groups of networks, which are an a network, a B network, and a C network, in the embodiment of the present invention, the B network is taken as an example for detailed description, and an AP in fig. 1 is shown as an access point.
The networking comprises service downloading equipment (shown as DL in figure 1) which are sequentially in communication connection, at least two cascaded convergence rings and an access ring; the service downloading device is an OTN device, serves as a service cross convergence point, and is used for forwarding the services of each convergence ring to the core router of each networking so as to realize flexible scheduling and transmission of the services. Specifically, the service downloading device is connected with the BRAS device through a 10GE optical port of a service interface of the service downloading device, so that service scheduling of a networking layer is realized. On the other hand, the service convergence and convergence are realized by connecting the 10GE optical port with the convergence ring.
The networking comprises at least two cascaded convergence rings, wherein two convergence rings are taken as an example in fig. 1 and comprise a primary convergence ring and an intermediate convergence ring; a primary convergence ring such as a county-county convergence ring, and a middle convergence ring such as a city-county convergence ring; the intermediate convergence ring comprises an OTN device, provides a transmission channel for a BRAS network of the primary convergence ring, meets the requirement of large service bandwidth, and is connected with the convergence ring through an OTN optical layer. The primary convergence ring comprises an OTN device, provides a transmission channel for an OLT network of an access layer, meets the requirement of large service bandwidth, and is connected with the access ring through an OTN optical layer.
The service bearing method based on the embodiment of the invention comprises two types: firstly, the user access device accesses to the service downloading device through the access ring and the convergence ring in sequence; or the second, the user access device accesses to the service downloading device through the access ring, the convergence ring and the main scheduling ring in sequence;
specifically, in the first case, the master scheduling ring is configured to control, when a target service downloading device of the user access device is a service downloading device of the same network, to open a route between a convergence ring where the user access device is located and the target service downloading device;
that is to say, when the target service downloading device is a service downloading device of the same network, and the currently-carried service is a service from the BRAS to a service downloading device of a core router of the same network, the route between the convergence ring where the user access device is located and the target service downloading device can be opened, that is, the service interface of the network is directly connected with the core router to open the service.
In the second case, if the target service downloading device of the user access device is a service downloading device of a different network, the main scheduling ring controls to open a route between the convergence ring where the user access device is located and the main scheduling ring, and the user access device is accessed to the target service downloading device through the main scheduling ring, that is, if the user access device is accessed to a core router of another network, the OTN sub-wavelength cross service needs to be performed to the target service downloading device of the target network through the OTN service downloading device, so as to implement cross-office scheduling.
In the above embodiment of the present invention, the hierarchical centralized scheduling of each level of service is realized by establishing an OTN network architecture including a main scheduling ring, at least two groups of networks, and a user access device; for the service downloading equipment of the same network, controlling the routing between the convergence ring where the user access equipment is located and the target service downloading equipment to be opened; for the service downloading equipment with different networking target service downloading equipment, the routing between the convergence ring where the user access equipment is located and the main scheduling ring is controlled to be opened, and the service is accessed to the target service downloading equipment through the main scheduling ring, so that the service bearing methods of two scenes are realized, the requirement of large-bandwidth multipoint transmission is met, and the networking flexibility of the network is improved. The embodiment of the invention makes up the defects of the network architecture and the service bearing method of the existing home wide bearing network, meets the requirements of large bandwidth, flexible scheduling and service protection of the home wide service, and solves the problem that the network architecture of the transmission network in the prior art is difficult to adapt to the increasing broadband requirement.
Optionally, in the embodiment of the present invention, an OTN electrical layer for communication connection is formed between the user access device and the access ring;
an OTN optical layer for communication connection is formed between the main scheduling ring and the service downloading equipment.
Specifically, the OTN mainly includes an optical layer and electrical layer architecture, and both layers of networks have corresponding operation maintenance management mechanisms and network reliability mechanisms. The OTN combines wavelength division multiplexing of an optical layer in a wavelength division multiplexing system and mapping, multiplexing, crossing, embedded overhead and other technologies of an optical transmission device (SDH) electric layer into a whole, thereby solving the problems of large-capacity transmission and scheduling, protecting and managing functions. The protection of OTN networks can be hierarchically divided into optical layer protection and electrical layer protection.
In the embodiment of the present invention, an OTN electrical layer for communication connection is formed between the user access device and the access ring, and an OTN optical layer for communication connection is formed between the main scheduling ring and the service downloading device.
Further, the OTN electrical layer comprises:
an optical channel payload unit OPUk, configured to map an optical signal of the user access device into a preset frame structure;
and an optical channel data unit ODUk, configured to forward the optical signal in the preset frame structure to the device interface of the access ring in a preset electrical crossing manner.
Wherein the OTN electrical layer primarily protects the OUTk frame structure defined by G.709, and the electrical layer comprises: an optical channel payload unit OPUk and an optical channel data unit ODUk; OPUk is used to map the optical signals of the subscriber access equipment into a predetermined frame structure, such as STM-N, IP packets, ATM cells, ethernet frames.
Specifically, the ODUk provides functions such as connectivity, connection protection, and monitoring that are independent of signals, and this layer is also called a data channel layer, and is configured to forward an optical signal in the preset frame structure to the device interface of the access ring in a preset electrical cross manner. The ODUk comprises an electric cross module, the centralized ODUk electric cross module is an important basis of OTN scheduling and protecting capacity, and the strong and fine management of the OTN is supported by rich embedded overhead. The OTN electric cross connection technology has perfect protection function, the switching time is less than 50ms, and ODUk-based subnet connection protection (SNCP) in the OTN electric layer main protection technology.
The ODUk _ SNCP protection belongs to subnet connection protection, and can be applied to a network structure of a chain, ring or wireless MESH network (MESH), and can protect part or all network nodes, and the protection principle is as follows: the ODUk 1+1 protection refers to a client signal passing through a tributary interface unit and an XCU (cross board) disk, and is sent to 1 main ODUk timeslot and 1 spare ODUk timeslot of a line interface disk, that is, to 1 main Port and 1 spare Port on the backplane side of the line interface disk, thereby avoiding service interruption caused by a fault of the main ODUk timeslot.
The ODUk _ SNCP uses the double-transmission selective reception of the electrical layer intersection for protection, adopts a single-ended switching mode, can be set into a return mode or a non-return mode through a network manager, and defaults to a non-recovery mode. The full network protocol is not required, less than 50 ms.
Optionally, the OTN electrical layer further comprises: the optical channel transport units OTUk, OTUk provide Forward Error Correction (FEC), optical segment layer protection and monitoring functions, which are also called digital segment layer.
In actual transmission, various client layer information is mapped into an ODUk through adaptation of an OPUk, then mapped into the ODUk, and overheads of an optical channel data unit and an optical channel transmission unit are added into the OTUk, respectively, and then mapped into an optical channel layer OCh, and finally modulated onto an optical channel carrier OCC. Optionally, in this embodiment of the present invention, the access ring includes:
and the broadband access server BRAS is used for accessing the user access equipment to the convergence ring, opening the route between the convergence ring where the user access equipment is located and the target service downloading equipment according to the scheduling of the main scheduling ring, and/or opening the route between the convergence ring where the user access equipment is located and the main scheduling ring.
Referring to fig. 1, the BRAS exists between the primary aggregation ring and the intermediate aggregation ring, and is configured to access the user access device to the aggregation ring, and open a route between the aggregation ring where the user access device is located and the target service download device, and/or open a route between the aggregation ring where the user access device is located and the main scheduling ring.
Optionally, in this embodiment of the present invention, when the BRAS accesses the user access device to the access ring, two branches to the aggregation ring are configured from an access point (an access point is shown as an AP in fig. 1) along two directions of the access ring;
the two branches include a branch for carrying the main service and a branch for carrying the standby service.
As a specific example, referring to fig. 2, the networking shown in fig. 2 includes: the county and county convergence ring is used as the primary convergence ring, and the city and county convergence ring is used as the intermediate convergence ring.
When the user access equipment is accessed to the access ring, two branches to the convergence ring are configured from the access point along two directions of the access ring, and taking a point D as an OLT access point as an example, the service from the point D to the point A, namely the service from a rural OLT point to a county BRAS point; in order to realize protection, the main service passing through B and the standby service passing through C are respectively carried out from the point D to form two branches D-B, D-C, wherein the two branches comprise a branch for bearing the main service and a branch for bearing the standby service; at the moment, the D point is used for protecting the SNCP1+1 sub-wavelength in the main and standby directions, the B point is used for carrying out the SNCP1+1 sub-wavelength punch-through service in the B-A, B-D direction, and the optical directions and the channel plates in the B-A direction and the B-D direction are applied to a public switching module, so that the cross punch-through capability in the two directions is realized. Similarly, point C and point B do SNCP1+1 sub-wavelength punch-through services in C-A and C-D directions at point C, respectively do primary service passing through point B and standby service passing through point C at point A, and at the moment, point A does SNCP1+1 sub-wavelength protection in the primary and standby directions. Thus, any breakpoint on the A-B-D link of the A-to-D service can be switched to the standby D-C-A link.
Optionally, in an embodiment of the present invention, the convergence ring includes a primary convergence ring and an intermediate convergence ring;
another service bearing mode from the OLT to the BRAS is that when the BRAS accesses the user access device to the access ring, two links are configured between a first access point and a second access point, and two links are configured between the second access point and a third access point;
the first access point is an access point for the user access equipment to access the access ring;
the second access point is an access point for the access ring to access the primary aggregation ring;
the third access point is an access point for the primary aggregation ring to access the intermediate aggregation ring.
Continuing with fig. 2, taking point H as the OLT ap as an example, point H is the first ap, point F is the second ap, and point E is the third ap.
In order to realize protection, the service from the point H to the point E is provided with two links which are divided into the service of H-F and the service of F-E, and the two links are butted by a service interface (UNI) at the point F. If H to F are used as main service and standby service, the H point can realize SNCP1+1 sub-wavelength protection in the main and standby directions of F, the F point can realize SNCP1+1 sub-wavelength protection in the main and standby directions of H, and any breakpoint on the F-H link of the H to F service can be switched to the standby F-G-H link.
Two links from E to F are configured similarly, and respectively perform main service and standby service, at the moment, the point E performs SNCP1+1 sub-wavelength protection in the main and standby directions of F, the point F performs SNCP1+1 sub-wavelength protection in the main and standby directions of E, and any breakpoint on the F-E link of the service from E to F can be switched to the standby F-G-E link. The scheme can realize the fault of the link at different sides in the EFG ring and the FGH ring, such as the service protection when the end between E-F and the H-G are interrupted simultaneously.
In addition, in the embodiment of the invention, the original PTN convergence ring is abandoned in the range of a city and county convergence ring (an intermediate convergence ring), and an OTN convergence ring is introduced to adapt to the requirement of large bandwidth of home wide services; optionally, the city and county convergence ring adopts a 40-wave or 80-wave × 100G system, 1 pair of fiber cores are also used, the capacity is 40 to 80 times that of the PTN convergence ring, the convergence transmission capability can be greatly improved, the service development requirement in a longer period can be met, and the network can be basically stable.
The single station peak bandwidth requirement of the rural OLT is as high as about 10G, and the uplink bandwidth of the access layer in the same region is 10 times of the capacity of the uplink bandwidth of the existing access layer; in addition to the home wide service requirement, group private lines need to be developed, and the capacity is actually larger than the existing network requirement; the area and power resources of the convergent node computer room cannot be infinitely enlarged under certain conditions, and under the condition of the same using area and power consumption, the method is a better method for selecting equipment with larger capacity, and compared with 1 set of OTN, 10 sets of PTN have the advantages that the equipment installation occupies a small area, power consumption and investment are not greatly different, but the capacity of the later set is greatly improved.
With the implementation of a broadband strategy, the requirement of network bandwidth increases, the quantity of the required services and the development of the services increase, more sink nodes are added, the distribution is irregular, the original transmission networking sink ring adopts a cross-county networking mode, and the number of the sink rings required to be newly built is large within the cross-county sink ring range. In the actual construction process, due to the fact that the construction of pipelines, optical cables and convergence machine rooms is not synchronous, the construction scale and the starting time of new convergence machine rooms in each county area are different, if a county-crossing convergence ring networking mode is adopted, the construction progress is slow due to the influence of a certain factor, the influence area is larger, and the production efficiency is low. In the embodiment of the invention, a county and county convergence ring (primary convergence ring) is divided into a plurality of areas to form the county and county convergence ring, the convergence node of the county and county convergence ring and an access ring adopts a device with large ODUK cross capability, and the rings can realize multidirectional service cross scheduling through a cross module, so that the requirement of multipoint access of an OLT service is met, and flexible scheduling is realized. After the networking area is reduced, the coverage area is reduced, each area does not have direct contact any more, flexible networking can be realized according to the construction conditions of convergence machine rooms, pipelines and optical cables in the area, and the production efficiency is improved.
The access ring is used for accessing the user access equipment, and with the rapid increase of bandwidth demand, the extension of the OTN to the rural access ring becomes a necessary trend. However, the access ring points are multi-faceted and wide, in the embodiment of the invention, flexible networking can be carried out by depending on a convergence ring in small regions of county and county, and the flexible service bearing mode can be adopted by depending on the convergence device ODUK cross capability of the convergence point and the selection of the protection mode. Compared with the prior art, the OTN sinks to rural areas and only solves the problem of distance and fiber core multiplexing, the embodiment of the invention can realize end-to-end circuit management and service soft scheduling in the whole process of the access layer and the convergence layer, and does not need to carry out optical fiber hopping connection at each site of the OTN to open a hard scheduling mode of the service, thereby saving maintenance labor and improving the fault processing efficiency.
In the above embodiment of the present invention, the hierarchical centralized scheduling of each level of service is realized by establishing an OTN network architecture including a main scheduling ring, at least two groups of networks, and a user access device; for the service downloading equipment of the same network, controlling the routing between the convergence ring where the user access equipment is located and the target service downloading equipment to be opened; for the service downloading equipment with different networking target service downloading equipment, the routing between the convergence ring where the user access equipment is located and the main scheduling ring is controlled to be opened, and the service is accessed to the target service downloading equipment through the main scheduling ring, so that the service bearing methods of two scenes are realized, the requirement of large-bandwidth multipoint transmission is met, and the networking flexibility of the network is improved. The embodiment of the invention makes up the defects of the network architecture and the service bearing method of the existing home wide bearing network, and meets the requirements of large bandwidth, flexible scheduling and service protection of home wide services.
The foregoing describes an OTN network architecture of an optical transport network according to an embodiment of the present invention, and a scheduling method of the OTN network architecture of the optical transport network according to the embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 3, an embodiment of the present invention provides a scheduling method for an optical transport network OTN network architecture, which is applied to a primary scheduling ring of the optical transport network OTN network architecture, and the method includes:
Referring to fig. 1, a service bearer method according to an embodiment of the present invention includes two types: the first is that the user access device accesses the service downloading device through the access ring and the convergence ring in sequence, or the second is that the user access device accesses the service downloading device through the access ring, the convergence ring and the main scheduling ring in sequence;
specifically, step 301 corresponds to the first case, where the master scheduling ring is used to control the opening of the route between the convergence ring where the user access device is located and the target service downloading device, where the target service downloading device of the user access device is a service downloading device of the same network;
that is to say, when the target service downloading device is a service downloading device of the same network, and the currently-carried service is a service from the BRAS to a service downloading device of a core router of the same network, the route between the convergence ring where the user access device is located and the target service downloading device can be opened, that is, the service interface of the network is directly connected with the core router to open the service.
Step 302 corresponds to a second situation, in the second situation, if the target service downloading device of the user access device is a service downloading device of a different network, the master scheduling ring controls to open a route between the convergence ring where the user access device is located and the master scheduling ring, and the route is accessed to the target service downloading device through the master scheduling ring, that is, if the route is accessed to a core router of another network, the OTN sub-wavelength cross service needs to be performed to the target service downloading device of the target network through the OTN service downloading device, so as to implement cross-office scheduling.
In the above embodiment of the present invention, when the target service downloading device of the user access device is a service downloading device of the same network, the method controls the opening of the route between the convergence ring where the user access device is located and the target service downloading device; for the service downloading equipment with different networking target service downloading equipment, the routing between the convergence ring where the user access equipment is located and the main scheduling ring is controlled to be opened, and the service is accessed to the target service downloading equipment through the main scheduling ring, so that the service bearing methods of two scenes are realized, the requirement of large-bandwidth multipoint transmission is met, and the networking flexibility of the network is improved. The embodiment of the invention makes up the defects of the network architecture and the service bearing method of the existing home wide bearing network, meets the requirements of large bandwidth, flexible scheduling and service protection of the home wide service, and solves the problem that the network architecture of the transmission network in the prior art is difficult to adapt to the increasing broadband requirement.
Fig. 4 is a schematic structural diagram of an electronic device according to yet another embodiment of the present invention.
As shown in fig. 4, the electronic device may include: a processor (processor)410, a communication Interface 420, a memory (memory)430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. The processor 410 may call logic instructions in the memory 430 to perform the following method:
when a target service downloading device of a user access device of an OTN network architecture is a service downloading device of the same network group in the OTN network architecture, controlling to open a route between a convergence ring where the user access device is located and the target service downloading device;
if the target service downloading equipment of the user access equipment is service downloading equipment of different networking networks, controlling to open a route between a convergence ring where the user access equipment is located and a main scheduling ring of the OTN network architecture, so that the user access equipment is accessed to the target service downloading equipment through the main scheduling ring.
In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products.
In another embodiment of the present invention, a non-transitory computer-readable storage medium is provided, where a computer program is stored on the non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the steps in the method provided in the foregoing embodiment of the present invention are implemented, and details of the implementation are not repeated.
Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An OTN network system, comprising: the system comprises a main scheduling ring, at least two groups of networking and user access equipment;
the networking comprises service downloading equipment, at least two cascaded convergence rings and an access ring which are sequentially in communication connection;
the user access equipment is accessed to the service downloading equipment through the access ring and the convergence ring in sequence, or is accessed to the service downloading equipment through the access ring, the convergence ring and the main scheduling ring in sequence;
the main scheduling ring is used for controlling the opening of a route between a convergence ring where the user access equipment is located and the target service downloading equipment when the target service downloading equipment of the user access equipment is the service downloading equipment of the same network;
if the target service downloading equipment of the user access equipment is service downloading equipment of different networking networks, controlling to open a route between a convergence ring where the user access equipment is located and the main scheduling ring, and accessing the convergence ring to the target service downloading equipment through the main scheduling ring, and if the convergence ring is accessed to the target service downloading equipment through a core router of other networking networks, performing OTN sub-wavelength cross service to the target service downloading equipment of the target networking through the OTN service downloading equipment.
2. The OTN network system according to claim 1, wherein an OTN electrical layer for communication connection is formed between the user access device and the access ring;
an OTN optical layer for communication connection is formed between the main scheduling ring and the service downloading equipment.
3. The OTN network system of claim 2, wherein the OTN electrical layer comprises:
an optical channel payload unit OPUk, configured to map an optical signal of the user access device into a preset frame structure;
and an optical channel data unit ODUk, configured to forward the optical signal in the preset frame structure to the device interface of the access ring in a preset electrical crossing manner.
4. The OTN network system of claim 1, wherein the access ring comprises:
and the broadband access server BRAS is used for accessing the user access equipment to the convergence ring, opening the route between the convergence ring where the user access equipment is located and the target service downloading equipment according to the scheduling of the main scheduling ring, and/or opening the route between the convergence ring where the user access equipment is located and the main scheduling ring.
5. The OTN network system according to claim 4, wherein, when the BRAS accesses the user access equipment to the access ring, the BRAS configures two branches to the convergence ring from the access point along two directions of the access ring;
the two branches include a branch for carrying the main service and a branch for carrying the standby service.
6. The OTN network system according to claim 4, wherein the aggregation ring comprises a primary aggregation ring and an intermediate aggregation ring;
when the BRAS accesses the user access equipment to the access ring, two links are configured between a first access point and a second access point, and two links are configured between the second access point and a third access point;
the first access point is an access point for the user access equipment to access the access ring;
the second access point is an access point for the access ring to access the primary aggregation ring;
the third access point is an access point for the primary aggregation ring to access the intermediate aggregation ring.
7. A scheduling method of an optical transport network, OTN, network system, applied to the primary scheduling ring of the optical transport network, OTN, network system according to any of claims 1 to 6, the method comprising:
when a target service downloading device of a user access device of an OTN network architecture is a service downloading device of the same network group in the OTN network architecture, controlling to open a route between a convergence ring where the user access device is located and the target service downloading device; if the target service downloading equipment of the user access equipment is service downloading equipment of different networking, controlling to open a route between a convergence ring where the user access equipment is located and a main scheduling ring of the OTN network architecture, so that the user access equipment is accessed to the target service downloading equipment through the main scheduling ring, and if the user access equipment is accessed to the service downloading equipment of the target networking through a core router of other networking, making OTN sub-wavelength cross service to the target service downloading equipment of the target networking through the OTN service downloading equipment.
8. An electronic device, comprising a memory, a processor, a bus and a computer program stored on the memory and executable on the processor, the processor implementing the steps in the scheduling method of an optical transport network, OTN, network system as claimed in claim 7 when executing the program.
9. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that: the program when executed by a processor implements the steps in the scheduling method of an optical transport network, OTN, network system as claimed in claim 7.
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| CN114245244B (en) * | 2021-12-28 | 2023-06-16 | 安徽皖通邮电股份有限公司 | Complex service arrangement method, storage medium and device based on networking topology |
| CN115022752B (en) * | 2022-08-09 | 2022-10-21 | 江苏泽宇电力设计有限公司 | Breakpoint self-test method of OTN optical layer calculation and electrical layer configuration technology |
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| CN103188151A (en) * | 2011-12-31 | 2013-07-03 | 中国移动通信集团广东有限公司 | Packet transport network and method for transporting service in packet transport network |
| CN106301661B (en) * | 2012-07-30 | 2018-10-19 | 华为技术有限公司 | The method and apparatus for being transmitted in optical transfer network, receiving client signal |
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