End-to-End Configuration Method and Device with Cross-Level Reuse

Abstract

The present invention provides an end-to-end configuration method and apparatus for cross-level multiplexing, which are applied to the field of communication technologies. The method includes: performing cross-network path search according to the network topology of a hybrid network and cross-network routing search conditions to obtain a cross-network path search result; the hybrid network includes an optical transport network (OTN) and a synchronous digital hierarchy network (SDH); creating a virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross-network path search result; performing VC12 path search according to the source node and sink node of data transmission, multiplexing the VC4 channel layer path, and creating a virtual container VC12 channel layer path between the source node and the sink node. The method in the above embodiment realizes the cross-level multiplexing service configuration from VC12 to VC4, and solves the problems in the prior art that the single-station configuration method is used to complete service configuration for a hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices, the configuration process is too cumbersome and error-prone.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to an end-to-end configuration method and device for cross-level multiplexing. Background Art

[0002] In the field of communication technologies, with the demand for high-quality dedicated lines such as video calls, video conferences, and high-definition videos, the construction of high-bandwidth communication networks has become an inevitable trend. Currently, the core aggregation and dispatching networks newly built by operators are mainly based on high-bandwidth OTN devices. However, a large number of low-bandwidth SDH devices in the existing communication networks still require a relatively long period to be withdrawn from the network. At the same time, considering the network construction cost, making use of the existing resources can avoid waste of resources, which is also a solution adopted by many operators.

[0003] In the related art, for a hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices, a single-station configuration method is used to complete service configuration, and the configuration process is too cumbersome and prone to errors. Summary of the Invention

[0004] The present invention provides an end-to-end configuration method and device for cross-level multiplexing, so as to solve the defects of cumbersome service configuration and high error rate in the hybrid network in the prior art.

[0005] The present invention provides an end-to-end configuration method for cross-level multiplexing, including the following steps.

[0006] Perform a cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain a cross-network path search result;

[0007] Create a virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross-network path search result; the hybrid network includes an optical transport network OTN and a synchronous digital hierarchy network SDH;

[0008] Perform a VC12 path search according to the source node and the destination node of data transmission, multiplex the VC4 channel layer path, and create a virtual container VC12 channel layer path between the source node and the destination node.

[0009] According to the end-to-end configuration method for cross-level multiplexing provided by the present invention, the performing a cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain a cross-network path search result includes:

[0010] Determine the edge nodes in the hybrid network according to the network topology of the hybrid network; the edge nodes are the nodes where the OTN network and the SDH network in the hybrid network intersect;

[0011] Perform cross-network path search according to the edge nodes and cross-network routing search conditions in the hybrid network to obtain the cross-network path search result.

[0012] According to an end-to-end configuration method with cross-level multiplexing provided by the present invention, the cross-network routing search conditions include:

[0013] The optical channel data unit (ODU) time slot granularity used when crossing the OTN network.

[0014] According to an end-to-end configuration method with cross-level multiplexing provided by the present invention, after determining the edge nodes in the hybrid network according to the network topology of the hybrid network, it further includes:

[0015] Add identification information to the edge nodes in the hybrid network; the identification information is used to indicate that the node type is an edge node.

[0016] According to an end-to-end configuration method with cross-level multiplexing provided by the present invention, performing VC12 path search according to the source node and destination node of data transmission, multiplexing the VC4 channel layer path, and creating a VC12 channel layer path between the source node and the destination node includes:

[0017] In the case where the OTN network in the hybrid network corresponds to multiple VC4 channel layer paths, determine the target VC4 channel layer path from the multiple VC4 channel layer paths according to the source node and destination node of data transmission;

[0018] Multiplex the target VC4 channel layer path to create a VC12 channel layer path between the source node and the destination node.

[0019] According to an end-to-end configuration method with cross-level multiplexing provided by the present invention, the hybrid network includes at least one of the following:

[0020] A hybrid network of an OTN network with an SDH network looped;

[0021] A hybrid network of an OTN network with an SDH network cut;

[0022] A hybrid network of an OTN network with an SDH network crossed.

[0023] The present invention also provides an end-to-end configuration device with cross-level multiplexing, including the following modules:

[0024] A search module, configured to perform cross-network path search according to the network topology of the hybrid network and cross-network routing search conditions to obtain the cross-network path search result;

[0025] A creation module, configured to create a virtual container VC4 channel layer path corresponding to an OTN network in a hybrid network according to the cross-network path search result; the hybrid network includes an optical transport network OTN and a synchronous digital hierarchy network SDH;

[0026] A multiplexing module, configured to multiplex the VC4 channel layer path according to the source node and the sink node of data transmission, and create a virtual container VC12 channel layer path between the source node and the sink node.

[0027] The present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the end-to-end configuration method of cross-level multiplexing as described in any one of the above is implemented.

[0028] The present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the end-to-end configuration method of cross-level multiplexing as described in any one of the above is implemented.

[0029] The present invention further provides a computer program product, including a computer program. When the computer program is executed by a processor, the end-to-end configuration method of cross-level multiplexing as described in any one of the above is implemented.

[0030] The end-to-end configuration method and device for cross-level multiplexing provided by the present invention perform a cross-network path search according to the network topology of a hybrid network and cross-network routing search conditions to obtain a cross-network path search result; create a virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross-network path search result; perform a VC12 path search according to the source node and the sink node of data transmission, multiplex the VC4 channel layer path, and create a virtual container VC12 channel layer path between the source node and the sink node, thereby conveniently and quickly implementing the cross-level multiplexing service configuration from VC12 to VC4, enabling the edge devices in the core aggregation network to support the cross-level multiplexing from VC12 to VC4, effectively achieving seamless integration of service configurations between a low-bandwidth SDH device network and a high-bandwidth OTN device network, and solving the problems in the prior art that when using a single-station configuration method to complete service configuration for a hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices, the configuration process is too cumbersome and prone to errors. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic diagram of the network topology of the hybrid network provided by the present invention.

[0033] Figure 2 It is a schematic diagram of the device cross matrix provided by the present invention.

[0034] Figure 3 It is one of the schematic diagrams of the end-to-end configuration method for cross-level multiplexing provided by the present invention.

[0035] Figure 4 It is a schematic diagram of cross-network path search provided by the present invention.

[0036] Figure 5 It is the second schematic diagram of the end-to-end configuration method for cross-level multiplexing provided by the present invention.

[0037] Figure 6 It is a schematic diagram of the end-to-end configuration device for cross-level multiplexing provided by the present invention.

[0038] Figure 7 It is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0040] The following combines Figures 1 - 7 to describe the end-to-end configuration method and device for cross-level multiplexing of the present invention.

[0041] To facilitate a clearer understanding of the technical solutions of the embodiments of the present application, some technical contents related to the embodiments of the present application will be introduced first.

[0042] In the field of communication technology, with the demand for high-quality dedicated lines such as video calls, video conferences, and high-definition videos, the construction of high-bandwidth communication networks has become an inevitable trend. Currently, the newly built core aggregation and scheduling networks of operators are mainly based on high-bandwidth OTN devices. However, a large number of low-bandwidth SDH devices in the existing communication networks still require a relatively long period to be phased out. At the same time, considering the network construction cost, reusing these devices can avoid resource waste, which is also a solution adopted by many operators.

[0043] The hybrid networking of low-bandwidth SDH devices and high-bandwidth OTN devices has become a typical network topology. The customer services on low-bandwidth SDH devices usually mainly involve VC12 cross-connections. If all low-order VC12 cross-connections are scheduled or aggregated on the core aggregation device, it is inevitable that the core aggregation device needs to support a large VC12 cross-connection capacity, which will significantly increase the cost of the core aggregation device.

[0044] In the related technologies, for the hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices, using the single-station method to complete service configuration is too cumbersome and prone to errors, especially for the VC12 to VC4 cross-level multiplexing service configuration at the edge devices of the core network and the service configuration for traversing the hybrid network of SDH and OTN.

[0045] Exemplarily, a typical topology diagram of the hybrid network of a low-bandwidth SDH network and high-bandwidth OTN devices is as Figure 1 shown. Among them, A, B, C, and D are high-bandwidth OTN rings, and points A to D are all edge devices; K and L are in the form of a ring with a chain; H, I, and J are where the low-bandwidth SDH ring is tangent to the OTN ring; E, F, and G are where the low-bandwidth SDH ring intersects with the OTN ring. Note: A.4.1 represents port 1 of slot 4 of device A.

[0046] Taking the realization of the VC12 protection service from E.2.1 to J.2.1 as an example, the specific process of the single-station configuration method is described.

[0047] 1. Single-station configuration method

[0048] (1) Configure the VC12 SNCP protection service from E.2.1 to E.3.1 and E.3.2 on E;

[0049] (2) Configure the VC12 ordinary pass-through service from F.3.2 to F.3.1 on F;

[0050] (3) Configure the VC12 ordinary pass-through service from G.3.2 to G.3.1 on G;

[0051] (4) A, C, and D are the edge OTN devices of the SDH network and the OTN network, and the service configuration is relatively complex. Taking device A as an example, it is described in detail as follows. The services of C and D are configured in the same way.

[0052] Among them, 3-CARD is the SDH board and 4-CARD is the OTN board.

[0053] a) Cross-matrix description

[0054] Add a VC4 cross-matrix and a VC12 cross-matrix to the device respectively;

[0055] The left VC4 cross-connect matrix has 4 STM64 ports numbered 1, 3, 5, and 7;

[0056] The right VC12 cross-connect matrix has 4 STM64 ports numbered 2, 4, 6, and 8;

[0057] Ports 1-2, 3-4, 5-6, and 7-8 are corresponding ports, which can be understood as being directly connected by optical fibers;

[0058] The tributary board card establishes a VC4 cross-connection with the VC4 cross-connect matrix, and the VC12 cross-connection is completed in the VC12 cross-connect matrix.

[0059] b) Configure the VC12 to VC4 hierarchical multiplexing service from A.3.1 to A.4.1 and A.4.2 (Note: A.3.1 represents port 1 of slot 4 of device A)

[0060] As Figure 2 shown, configure the VC4 cross-connection (red line). Taking the first VC4 as an example:

[0061] 3-CARD-1-VC4:1--VC4 cross-connect matrix-1-VC4:1

[0062] 4-CARD-STM16:1-VC4:1 (main), 4-UO2X-STM16:5-VC4:1 (backup)--VC4 cross-connect matrix-3-VC4:1

[0063] Configure the VC12 cross-connection (blue line). Taking the first VC12 of the first VC4 as an example:

[0064] VC12 cross-connect matrix-2-VC4:1-VC12:1--VC12 cross-connect matrix-4-VC4:1-VC12:1

[0065] c) Configure the OTN service (purple line)

[0066] If ODU1 is used to carry the VC service on the OTN aggregation ring, two OTN services need to be configured

[0067] 4-CARD-STM16:1--4-CARD-1-ODU1:1

[0068] 4-CARD-STM16:5--4-CARD-2-ODU1:1

[0069] (5) Point B is not an edge OTN device, and only the pass-through ODU1 service from B.4.1 to B.4.2 needs to be configured;

[0070] (6) Configure the VC12 ordinary pass-through service from H.3.1 to F.3.2 on H;

[0071] (7) Configure VC12 normal pass-through service from I.3.2 to I.3.1 on I.

[0072] (8) Configure VC12 SNCP protection service from J.2.1 to J.3.1 and J.3.2 on J.

[0073] From the configuration method of the single station part, it can be seen that the service configuration process is very cumbersome. It is necessary to align ports and time slots for each network element one by one. Moreover, on the edge devices of the OTN aggregation ring, it is also necessary to configure complex cross-level multiplexing services from VC12 to VC4, and finally configure OTN services. That is, for the hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices mentioned above, using the single station method to complete service configuration is too cumbersome and prone to errors.

[0074] Figure 3 is one of the flow diagrams of the end-to-end configuration method for cross-level multiplexing provided by the present invention. As Figure 3 shown, the method includes the following:

[0075] Step 301: Perform cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain the cross-network path search result; the hybrid network includes an optical transport network (OTN) and a synchronous digital hierarchy network (SDH).

[0076] Specifically, in the related art, for the hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices, using the single station configuration method to complete service configuration, the configuration process is too cumbersome and prone to errors.

[0077] To solve the above problems, in the embodiments of the present application, first, perform cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain the cross-network path search result. Among them, the hybrid network includes an optical transport network (OTN) and a synchronous digital hierarchy network (SDH). Exemplarily, the network topology of the hybrid network is as Figure 1 shown. Optionally, the traditional end-to-end configuration method is usually implemented by layering. First, create OTN end-to-end services, and then create SDH end-to-end based on the OTN end-to-end services. This traditional configuration method is obviously not applicable to the current hybrid network. Optionally, as Figure 1As shown in the figure, the four nodes A - D in the hybrid network are the nodes where the OTN network and the SDH network intersect, that is, the nodes where SDH and OTN are multiplexed, and also the cross - network nodes. In this application, first, through cross - network path search, the cross - network path search result is obtained, that is, the routing result between the four nodes A - D is obtained. Furthermore, according to the cross - network path search result, the virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network can be created to complete the OTN service on the edge nodes of the hybrid network. Optionally, the cross - network path search result may include multiple routing results. Optionally, the cross - network routing search condition can be the regulations or restrictive conditions in the path search, which are not specifically limited in the embodiments of this application.

[0078] Step 302: Create the virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross - network path search result.

[0079] Specifically, after performing cross - network path search according to the network topology of the hybrid network and the cross - network routing search condition to obtain the cross - network path search result, in the embodiments of this application, further create the virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross - network path search result. Optionally, as Figure 1 shown, the VC4 channel layer path service is the service from one VC4 of OTN edge devices A.3.1 and C.3.1 to one VC4 of OTN edge devices D.3.1 and D.3.2, which covers all services on A, B, C, and D, that is, it includes the cross - network multiplexing service from A.3.1 to A4.1 and A.4.2, the OTN pass - through service from B.4.1 to B.4.1, the cross - network multiplexing service from C.3.1 to C.4.1 and C.4.2, and the cross - level multiplexing service from D.3.1 and D.3.2 to D.4.1 and D.4.1.

[0080] Step 103: Perform VC12 path search according to the source node and destination node of data transmission, multiplex the VC4 channel layer path, and create the virtual container VC12 channel layer path between the source node and the destination node.

[0081] Specifically, the embodiments of this application can further create the virtual container VC12 channel layer path between the source node and the destination node by multiplexing the already created VC4 channel layer path, thus conveniently and quickly realizing the configuration of the VC12 - to - VC4 cross - level multiplexing service. Through the VC12 - to - VC4 cross - level multiplexing of the edge devices of the core aggregation network, the seamless integration of the service configuration between the low - bandwidth SDH device network and the high - bandwidth OTN device network is effectively achieved, solving the problem in the prior art that when using the single - station configuration method to complete the service configuration for the hybrid network of low - bandwidth SDH devices and high - bandwidth OTN devices, the configuration process is too cumbersome and prone to errors. Optionally, as Figure 1As shown in the figure, in this application, the VC12 service is created based on the VC4 channel layer service, covering all services on E, F, G, H, I, and J, that is, including the SNCP services from E.2.1 to E.3.1 and E.3.2, the pass-through services from F.3.1 to F.3.2 and G.3.1 to G.3.2, the pass-through services from H.3.1 to H.3.2 and I.3.2 to H.3.1, the SNCP services from J.2.1 to J.3.1 and J.3.2. At the same time, it covers the VC12 scheduling services of the internal cross-connect matrix on the edge nodes A, C, and D.

[0082] For the method of the above embodiment, according to the network topology of the hybrid network and the cross-network routing search conditions, perform a cross-network path search to obtain the cross-network path search result; according to the cross-network path search result, create the virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network; according to the source node and the destination node of data transmission, perform a VC12 path search, multiplex the VC4 channel layer path, and create the virtual container VC12 channel layer path between the source node and the destination node, thereby conveniently and quickly realizing the cross-level multiplexing service configuration from VC12 to VC4, enabling the edge devices in the core aggregation network to support the cross-level multiplexing from VC12 to VC4, effectively achieving the seamless integration of the service configurations of the low-bandwidth SDH device network and the high-bandwidth OTN device network, and solving the problems in the prior art that when using a single-station configuration method to complete the service configuration for the hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices, the configuration process is too cumbersome and prone to errors.

[0083] In one embodiment, according to the network topology of the hybrid network and the cross-network routing search conditions, perform a cross-network path search to obtain the cross-network path search result, including:

[0084] According to the network topology of the hybrid network, determine the edge nodes in the hybrid network; the edge nodes are the nodes where the OTN network and the SDH network in the hybrid network intersect;

[0085] According to the edge nodes in the hybrid network and the cross-network routing search conditions, perform a cross-network path search to obtain the cross-network path search result.

[0086] Specifically, in the embodiment of this application, first, according to the network topology of the hybrid network, determine the edge nodes in the hybrid network. For example, as Figure 1 shown, the four nodes A - D in the hybrid network are the nodes where the OTN network and the SDH network intersect, that is, the cross-network nodes for SDH and OTN multiplexing and the edge nodes in the hybrid network. Optionally, after determining the edge nodes in the hybrid network, further, according to the edge nodes in the hybrid network and the cross-network routing search conditions, perform a cross-network path search to obtain the cross-network path search result. Optionally, the cross-network routing search condition is the optical channel data unit ODU time slot granularity used when crossing the OTN network.

[0087] Exemplarily, as Figure 4 shown, according to the edge nodes in the hybrid network and the cross-network routing search conditions, the specific process of cross-network path search to obtain the cross-network path search result is as follows:

[0088] a) Select source and destination nodes.

[0089] b) Select the ODU time slot granularity (ODU0, ODU1, ODU2, etc.) used for the cross-OTN ring network (A - D).

[0090] c) Conduct routing search to effectively solve the cross-network routing problem. Optionally, the OTN connection between A and D is segmented at the time slot granularity selected in step b), which is equivalent to n independent SDH connections. Assume that the connection between A and D is through an OTU2 port. When the ODU time slot granularity selected in step (b) is ODU1, between A and D, it is equivalent to having 4 STM16 SDH port connections between each two points.

[0091] d) Automatically complete the OTN service on nodes A - D according to the searched route.

[0092] The method of the above embodiment determines the edge nodes in the hybrid network according to the network topology of the hybrid network; conducts cross-network path search according to the edge nodes in the hybrid network and the cross-network routing search conditions to obtain the cross-network path search result, effectively solving the cross-network routing problem. Furthermore, according to the cross-network path search result, the virtual container VC4 path layer path corresponding to the OTN network in the hybrid network can be created, and the OTN service on the edge nodes of the hybrid network can be completed.

[0093] In one embodiment, after determining the edge nodes in the hybrid network according to the network topology of the hybrid network, it further includes:

[0094] Add identification information to the edge nodes in the hybrid network; the identification information is used to indicate that the node type is an edge node.

[0095] Specifically, in the embodiment of the present application, identification information is added to the edge nodes in the hybrid network. For example, "channel edge point" is marked on the edge node to indicate that the node is an edge node. Thus, when conducting cross-network routing search, the edge nodes can be determined more accurately and quickly, effectively improving the efficiency of cross-network routing search and the creation efficiency of the virtual container VC4 path layer path corresponding to the OTN network in the hybrid network.

[0096] In one embodiment, according to the source node and destination node of data transmission, conduct VC12 path search, multiplex the VC4 path layer path, and create a VC12 path layer path between the source node and the destination node, including:

[0097] When the OTN network in the hybrid network corresponds to multiple VC4 channel layer paths, determine the target VC4 channel layer path from the multiple VC4 channel layer paths according to the source node and the sink node of data transmission;

[0098] According to the result of VC12 path search, multiplex the target VC4 channel layer path to create a VC12 channel layer path between the source node and the sink node.

[0099] Specifically, as Figure 1 shown, when performing cross-network routing search, when the selected ODU time slot granularity is ODU1, between A and D, it is equivalent to having 4 STM16 SDH port connections between every two points, and there can be multiple routing results and corresponding multiple VC4 channel layer paths between A and D. In the case where the OTN network in the hybrid network corresponds to multiple VC4 channel layer paths, according to the source node and the sink node of data transmission (such as source node E.2.1 and sink node J.2.1), when performing VC12 path search, specifically, for the path service from any VC12 of E.2.1 to any VC12 of J.2.1, if the connections between E.3.1 and F.3.2, F.3.1 and A.3.1, E.3.2 and G.3.2, G.3.1 and C.3.1 are STM-16 rate SDH ports, that is, each route has 16 VC4 options. Similarly, for the connections between D.3.1 and H.3.1, H.3.2 and J.3.2, D.3.2 and I.3.2, I.3.1 and J.3.1 which are also STM-16 rate SDH ports, that is, each route also has 16 VC4 options, then there are 16 VC4 channel layer paths available for the corresponding VC12 path from E.2.1 to J.2.1. That is, determine the target VC4 channel layer path from the multiple VC4 channel layer paths, and by multiplexing the target VC4 channel layer path and creating VC12 cross-scheduling services on the internal cross matrices of the edge nodes A, C, and D at the same time, the VC12 channel layer path between the source node and the sink node can be created accurately and efficiently. Optionally, the target VC4 channel layer path can be the path with the shortest data transmission distance between the source node and the sink node among the multiple VC4 channel layer paths, or it can be the VC4 channel layer path without faults after diagnosis, thus achieving the effect of accurately determining the target VC4 channel layer path from the multiple VC4 channel layer paths, and further enabling the creation of the virtual container VC12 channel layer path between the source node and the sink node more efficiently, and realizing the VC12 to VC4 cross-level multiplexing service configuration more conveniently and quickly.

[0100] In the method of the above embodiment, when the OTN network in the hybrid network corresponds to multiple VC4 channel layer paths, when searching for the VC12 path according to the source node and the sink node of data transmission, the target VC4 channel layer path is determined from multiple VC4 channel layer paths, thus achieving the effect of accurately determining the target VC4 channel layer path from multiple VC4 channel layer paths. Furthermore, the virtual container VC12 channel layer path between the source node and the sink node can be created more efficiently, and the cross-level multiplexing service configuration from VC12 to VC4 can be realized more conveniently and quickly.

[0101] In one embodiment, the hybrid network includes at least one of the following:

[0102] A hybrid network of an OTN network ring with an SDH network;

[0103] A hybrid network of an OTN network cut with an SDH network;

[0104] A hybrid network of an OTN network cross with an SDH network.

[0105] Specifically, the hybrid network in the embodiments of the present application includes, but is not limited to, a hybrid network of an OTN network ring with an SDH network, a hybrid network of an OTN network cut with an SDH network, and a hybrid network of an OTN network cross with an SDH network. That is, the end-to-end configuration method for cross-level multiplexing in the present application can be compatible with various complex topological forms and applied to different hybrid network scenarios, greatly improving the operation and maintenance efficiency of operators.

[0106] For example, as Figure 1 shown, it can be applied to a ring with a chain (ring A - D with chain LK), a tangent ring (ring A - D tangent to ring HIJ), and an intersecting ring (ring A - D intersecting with ring EFG). Among them, different forms of SDH subnets are attached to the OTN core network, and the VC4 channel layer service forms will be different.

[0107] The VC4 channel layer service can be divided into three service forms:

[0108] a) Point-to-point

[0109] Point-to-point is a traditional SDH / OTN service form, that is, one source and one sink.

[0110] For the three SDH subnets of ring with a chain to ring with a chain, ring with a chain to tangent ring, and tangent ring to tangent ring, they are combined with the core OTN network and applicable to this scenario.

[0111] b) Point-to-multipoint

[0112] Point-to-multipoint, that is, one source and two sinks or two sources and one sink, is not a traditional SDH / OTN service form and is more common in the data communication field.

[0113] This scenario is applicable to the combination of the core OTN network with two types of SDH subnets: the annular belt chain to the intersecting ring and the annular belt chain to the tangent ring.

[0114] b) Multi-point to multi-point

[0115] Point-to-multipoint, that is, multiple sources and multiple sinks, is not a traditional SDH / OTN service form either. It is more common in the data communication field, similar to ELAN services or VPLS (Virtual Private LAN Service) services.

[0116] This scenario is applicable to the combination of the core OTN network with two types of SDH subnets: the tangent ring to the tangent ring and the intersecting ring to the intersecting ring.

[0117] For the VC4 channel layer path, to be compatible with the service scenarios of point-to-multipoint and multi-point to multi-point, an option of "channel edge point" is added to identify the edge nodes. For the source and sink nodes, as long as this option is selected, multiple sources or multiple sinks can be selected. The cross-level multiplexing service configuration of VC12 to VC4 is completed at the source and sink edge nodes, and the OTN pass-through service is created at the non-edge nodes.

[0118] In the method of the above embodiments, the end-to-end configuration method of cross-level multiplexing in this application can be compatible with various complex topological forms and is applied to different scenarios of hybrid networks, greatly improving the operation and maintenance efficiency of operators.

[0119] Exemplarily, this application takes Figure 1 and Figure 5 as examples to specifically illustrate the end-to-end configuration method of the VC12 to VC4 cross-level multiplexing service from E.2.1 to J.2.1. The specific process is as follows:

[0120] It can be seen from the topology diagram that the channel layer path is from A.3.1 and C.3.1 to D.3.1 and D.3.2, that is, a multi-source and multi-sink service form. For the source and sink nodes, the "channel edge point" needs to be selected.

[0121] If the OTN ring network plans to carry VC services with OTN services of ODU1 granularity, it is necessary to select the OTN time slot granularity as ODU1 for cross-network path search.

[0122] (1) Select the OTN service level ODU1.

[0123] (2) Select the source of the VC4 channel layer path A.3.1, and at the same time select the "channel edge point" and select multiple sources C.3.1.

[0124] (3) Select the sink of the VC4 channel layer path D.3.1, and at the same time select the "channel edge point" and select multiple sinks D.3.2.

[0125] (4) Perform cross-network routing search, connect each OTN port between A and D, which is equivalent to performing a search for 4 independent STM16 SDH port connections.

[0126] (5) Complete the creation of the VC4 channel layer path.

[0127] (6) Select the source E.2.1 and the destination J.2.1, the service level is VC12, and the path type is selected based on the VC4 channel layer path to search for all eligible VC4 channel layer paths.

[0128] (7) Select the target VC4 channel layer path and complete the creation of the VC12 channel layer path.

[0129] The method of the above embodiment performs cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain the cross-network path search result; according to the cross-network path search result, create the virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network; according to the source node and the destination node of data transmission, perform VC12 path search, multiplex the VC4 channel layer path, and create the virtual container VC12 channel layer path between the source node and the destination node, thus conveniently and quickly realizing the cross-level multiplexing service configuration from VC12 to VC4, enabling the edge devices in the core aggregation network to support the cross-level multiplexing from VC12 to VC4, effectively achieving the seamless integration of the service configurations of the low-bandwidth SDH device network and the high-bandwidth OTN device network, and effectively solving the problems in the prior art that for the hybrid network of low-bandwidth SDH devices and high-bandwidth OTN devices, using the single-station configuration method to complete the service configuration, the configuration process is too cumbersome and prone to errors.

[0130] Next, the end-to-end configuration device for cross-level multiplexing provided by the present invention will be described. The end-to-end configuration device for cross-level multiplexing described below can be correspondingly referred to the end-to-end configuration method for cross-level multiplexing described above. The end-to-end configuration device for cross-level multiplexing in the embodiments of the present application is as Figure 6 shown and includes:

[0131] A search module 610, configured to perform cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain the cross-network path search result;

[0132] A creation module 620, configured to create the virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross-network path search result; the hybrid network includes an optical transport network OTN and a synchronous digital hierarchy network SDH;

[0133] A multiplexing module 630, configured to perform VC12 path search according to the source node and the destination node of data transmission, multiplex the VC4 channel layer path, and create the virtual container VC12 channel layer path between the source node and the destination node.

[0134] Optionally, the search module 610 is specifically configured to determine the edge nodes in the hybrid network according to the network topology of the hybrid network; the edge nodes are the nodes where the OTN network and the SDH network in the hybrid network intersect.

[0135] Perform cross-network path search based on the edge nodes in the hybrid network and the cross-network routing search conditions to obtain the cross-network path search results.

[0136] Optionally, the cross-network routing search conditions include:

[0137] The optical channel data unit (ODU) time slot granularity used when crossing the OTN network.

[0138] Optionally, the search module 610 is further configured to add identification information to the edge nodes in the hybrid network; the identification information is used to indicate that the node type is an edge node.

[0139] Optionally, when there are multiple VC4 channel layer paths corresponding to the OTN network in the hybrid network, the multiplexing module 630 is specifically configured to perform VC12 path search according to the source node and the destination node of data transmission, and determine the target VC4 channel layer path from the multiple VC4 channel layer paths.

[0140] Multiplex the target VC4 channel layer path according to the search results of the VC12 path, and create a VC12 channel layer path between the source node and the destination node.

[0141] Optionally, the hybrid network includes at least one of the following:

[0142] A hybrid network of an OTN network ring with an SDH network;

[0143] A hybrid network of an OTN network cut with an SDH network;

[0144] A hybrid network of an OTN network intersection with an SDH network.

[0145] Figure 7The figure illustrates a schematic diagram of the physical structure of an electronic device, which may include: a processor 710, a communications interface 720, a memory 730, and a communication bus 740. Among them, the processor 710, the communications interface 720, and the memory 730 communicate with each other through the communication bus 740. The processor 710 can call the logical instructions in the memory 730 to execute an end-to-end configuration method for cross-level multiplexing. The method includes: performing a cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain a cross-network path search result; the hybrid network includes an optical transport network OTN and a synchronous digital hierarchy network SDH; creating a virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross-network path search result; multiplexing the VC4 channel layer path according to the source node and the destination node of data transmission to create a virtual container VC12 channel layer path between the source node and the destination node.

[0146] In addition, when the logical instructions in the above-mentioned memory 730 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc that can store program codes.

[0147] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the end-to-end configuration method for cross-level multiplexing provided by the above-mentioned various methods. The method includes: performing a cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain a cross-network path search result; the hybrid network includes an optical transport network OTN and a synchronous digital hierarchy network SDH; creating a virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross-network path search result; multiplexing the VC4 channel layer path according to the source node and the destination node of data transmission to create a virtual container VC12 channel layer path between the source node and the destination node.

[0148] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements an end-to-end configuration method for cross-level multiplexing provided by the above-mentioned various methods. The method includes: performing a cross-network path search according to the network topology of the hybrid network and the cross-network routing search conditions to obtain a cross-network path search result; the hybrid network includes an optical transport network (OTN) and a synchronous digital hierarchy network (SDH); creating a virtual container VC4 channel layer path corresponding to the OTN network in the hybrid network according to the cross-network path search result; multiplexing the VC4 channel layer path according to the source node and the destination node of data transmission, and creating a virtual container VC12 channel layer path between the source node and the destination node.

[0149] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative labor.

[0150] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An end-to-end configuration method with cross-level reuse, characterized in that, Including: Perform cross-network path search according to the network topology of the hybrid network and cross-network routing search conditions to obtain cross-network path search results; the hybrid network includes an optical transport network (OTN) and a synchronous digital hierarchy network (SDH); Create a virtual container VC4 path layer for the OTN network in the hybrid network according to the cross-network path search results; Perform VC12 path search according to the source node and destination node of data transmission, multiplex the VC4 path layer, and create a virtual container VC12 path layer between the source node and the destination node; The performing cross-network path search according to the network topology of the hybrid network and cross-network routing search conditions to obtain cross-network path search results includes: Determine the edge nodes in the hybrid network according to the network topology of the hybrid network; the edge nodes are the nodes where the OTN network and the SDH network in the hybrid network intersect; Perform cross-network path search according to the edge nodes in the hybrid network and cross-network routing search conditions to obtain cross-network path search results; The cross-network routing search conditions include: The optical channel data unit (ODU) time slot granularity used when crossing the OTN network; After determining the edge nodes in the hybrid network according to the network topology of the hybrid network, it further includes: Add identification information to the edge nodes in the hybrid network; the identification information is used to indicate that the node type is an edge node.

2. The end-to-end configuration method for cross-level multiplexing according to claim 1, wherein The multiplexing the VC4 path layer and creating a VC12 path layer between the source node and the destination node according to the source node and destination node of data transmission includes: In the case where there are multiple VC4 path layers corresponding to the OTN network in the hybrid network, determine the target VC4 path layer from the multiple VC4 path layers according to the source node and destination node of data transmission; Multiplex the target VC4 path layer and create a VC12 path layer between the source node and the destination node.

3. The end-to-end configuration method with cross-level multiplexing according to claim 1, characterized in that The hybrid network includes at least one of the following: A hybrid network of an OTN network with an SDH network in a ring; A hybrid network of an OTN network with an SDH network in a cut-ring; A hybrid network of an OTN network with an SDH network in an intersection-ring.

4. An end-to-end configuration device with cross-level reuse, characterized in that, Including: A search module for performing cross-network path search according to the network topology of the hybrid network and cross-network routing search conditions to obtain cross-network path search results; The performing cross-network path search according to the network topology of the hybrid network and cross-network routing search conditions to obtain cross-network path search results includes: Determine the edge nodes in the hybrid network according to the network topology of the hybrid network; the edge nodes are the nodes where the OTN network and the SDH network in the hybrid network intersect; add identification information to the edge nodes in the hybrid network; the identification information is used to indicate that the node type is an edge node; Perform cross-network path search according to the edge nodes in the hybrid network and cross-network routing search conditions to obtain cross-network path search results; the cross-network routing search conditions include: the optical channel data unit (ODU) time slot granularity used when crossing the OTN network; A creation module, configured to create a virtual container VC4 channel layer path corresponding to an OTN network in a hybrid network according to the cross-network path search result; the hybrid network includes an optical transport network OTN and a synchronous digital hierarchy network SDH; A multiplexing module, configured to multiplex the VC4 channel layer path according to the source node and the sink node of data transmission, and create a virtual container VC12 channel layer path between the source node and the sink node.

5. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the end-to-end configuration method for cross-level multiplexing according to any one of claims 1 to 3.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the end-to-end configuration method for cross-level multiplexing according to any one of claims 1 to 3.

7. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the end-to-end configuration method for cross-level multiplexing according to any one of claims 1 to 3.

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