An optical module and a system for realizing network intercommunication through the optical module
By processing data frames from PTN and OTN devices using optical modules, interoperability between different optical networks is achieved, solving the problems of high cost and complexity in existing technologies, improving equipment flexibility and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
- Filing Date
- 2024-12-12
- Publication Date
- 2026-06-12
AI Technical Summary
In existing technologies, achieving interoperability between PTN and OTN devices in different optical networks through protocol conversion network equipment or different service adapter boards is costly and complex, making it difficult to meet the needs for flexibility and cost-effectiveness.
The use of optical modules, including photoelectric receiving units, demapping units, and service framing units, enables data frame processing and interoperability between PTN and OTN devices, reducing the scale cost of the equipment.
It improves the access flexibility of PTN and OTN devices, reduces production costs, and simplifies the device interoperability process.
Smart Images
Figure CN122205271A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of communication technology, and in particular to an optical module and a system for achieving network interconnection through the optical module. Background Technology
[0002] To address the interoperability of network devices across different optical networks, there are typically two approaches. One approach is to use protocol conversion network devices to enable interoperability of service interfaces between PTN and OTN devices across different optical networks. The other approach is to use different service adapter boards to enable interoperability of service interfaces between PTN and OTN devices across different optical networks.
[0003] However, achieving network interoperability by using protocol conversion network devices or different service adapter boards is usually costly, and different adapter boards need to be developed for different customer-side services, making the process complex. Summary of the Invention
[0004] This invention discloses an optical module and a system for achieving network interconnection through the optical module, which enables interconnection between different networks, reduces costs, and improves flexibility.
[0005] In a first aspect, this application provides an optical module, the optical module comprising: an optoelectronic receiving unit, a demapping unit, and a service framing unit; the optoelectronic receiving unit is configured to: receive a first data frame from a packet transport network (PTN) device through a first interface; the demapping unit is configured to: perform demapping processing on the first data frame to obtain a service flow of the first data frame; the first service framing unit is configured to: perform OTN framing processing on the service flow of the first data frame to obtain a first OTN frame, and send the first OTN frame to the OTN device through a second interface.
[0006] The optical module described above receives a first data frame from the first interface of the PTN device. The first data frame is demapped by the first demapping unit to obtain the service flow of the first data frame. The service flow of the first data frame is then processed by OTN framing to obtain the first OTN frame. The first OTN frame is then sent to the OTN device through the second interface, thereby realizing the interoperability between the PTN device and the OTN device, improving the access flexibility and reducing production costs.
[0007] In one possible implementation, the optical module further includes a service deframe unit, a mapping unit, and an optoelectronic transmission unit; the service deframe unit is used to: deframe the second OTN frame from the OTN device via the second interface to obtain the service flow of the second OTN frame; the mapping unit is used to: map the service flow of the second OTN frame to obtain a second data frame; the optoelectronic transmission unit is used to: send the second data frame to the PTN device via the first interface.
[0008] The aforementioned optical module processes the second OTN frame on the OTN device into a second data frame, which is then sent to the PTN device through the first interface, enabling interoperability between the PTN and OTN devices, improving access flexibility, and reducing production costs.
[0009] In one possible implementation, the demapping unit is further used to obtain overhead (OH) information; the optical module further includes: a first OH insertion unit, used to insert the OH information during the framing process, wherein the first OTN frame includes the OH information.
[0010] In one possible implementation, the first interface is an external interface, the second interface is an internal interface, and the optical module is plugged into the OTN device through the second interface.
[0011] In one possible implementation, the first interface is an internal interface, the second interface is an external interface, and the optical module is plugged into the PTN device through the first interface.
[0012] In one possible implementation, the PTN device is an aggregation layer router or switch, and the OTN device is an access layer router or switch; or, the OTN device is an aggregation layer router or switch, and the PTN device is an access layer router or switch; or, the PTN device is an access layer PSE device, and the OTN device is a CPE device; or, the PTN device is a CPE device, and the OTN device is an access layer PSE device.
[0013] In one possible implementation, the second interface is any of the following: OTN OTUk interface, OTUCn interface, FlexO-n interface; the first interface can be any of the following: Flexe interface, SDH interface, Ethernet interface, FC interface, CBR interface.
[0014] In one possible implementation, the first data frame or the second data frame is any one of the following: Flexe data frame, SDH data frame, Ethernet data frame, FC data frame, CBR data frame; the first OTN frame or the second OTN frame is any one of the following: OTUk frame, OTUCn frame, FlexO-n frame.
[0015] Secondly, this application provides a system for network interconnection via an optical module, the system comprising: a PTN device, an OTN device, and the optical module described in the first aspect; the PTN device is configured to: send a first data frame through a first interface; the optical module is configured to: receive the first data frame from the PTN device through the first interface, process the first data frame into a first OTN frame, and send the first OTN frame to the OTN device through a second interface; the OTN device is configured to: receive the first OTN frame from the optical module.
[0016] In one possible implementation, the OTN device is further configured to: transmit a second OTN frame; the optical module is further configured to: receive the second OTN frame from the OTN device through a second interface, process the second OTN frame into a second data frame, and transmit the second data frame to the PTN device through the first interface; the PTN device is further configured to: receive the second data frame from the optical module. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the SPN architecture for small particle technology;
[0018] Figure 2 This is a schematic diagram of the fgOTN architecture;
[0019] Figure 3 A schematic diagram of the independent networking structure for flexe / fgMTN / FGU and OTN / OSU / fgOTN technologies;
[0020] Figure 4 This is a schematic diagram of the structure of a hybrid network using flexe / fgMTN / FGU and OTN / OSU / fgOTN technologies;
[0021] Figure 5 This is a schematic diagram of the structure of a hybrid network using flexe / fgMTN / FGU and OTN / OSU / fgOTN technologies;
[0022] Figure 6 A schematic diagram illustrating the interoperability of flexe / SDH / Ethernet / FC / CBR and OTN / OSU / fgOTN service interfaces through a protocol conversion network conversion device;
[0023] Figure 7A schematic diagram illustrating how to achieve interoperability between flexe / SDH / Ethernet / FC / CBR and OTN / OSU / fgOTN service interfaces through different service adapter boards;
[0024] Figure 8 A schematic diagram of the structure of an optical module provided in this application;
[0025] Figure 9 This application provides an schematic diagram of an optical module convergence layer.
[0026] Figure 10 This application provides an schematic diagram of an optical module access layer.
[0027] Figure 11 A schematic diagram of the structure of an optical module provided in this application;
[0028] Figure 12 This application provides an schematic diagram of an optical module convergence layer.
[0029] Figure 13 This is a schematic diagram illustrating the application of an optical module access layer provided in this application. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0031] In embodiments of the present invention, "multiple" refers to two or more. Terms such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or order.
[0032] To facilitate understanding, the technical background of the following embodiments of this application will be described in detail first.
[0033] Optical transport network (OTN) technology combines the advantages of synchronous digital hierarchy (SDH) in networking and operation with the high-bandwidth transmission capabilities of wavelength division multiplexing (WDM). It boasts advantages such as long-distance transmission, high capacity, hard isolation, low latency, and low power consumption, making it a recognized next-generation mainstream technology in the industry. The transport network consists of multiple layers, including the backbone network, metropolitan area network (MAN), and access network, with the backbone network being the most crucial. OTN has very strong transmission capabilities and extremely high bandwidth, and was initially applied to backbone transmission networks, i.e., long-distance trunk line scenarios.
[0034] Broadband services offered by telecom operators are no longer limited to residential users; many government and enterprise users also serve this market. Some of these users have high requirements for latency, security, and reliability, and therefore use dedicated lines. However, most of their business connections do not actually require high bandwidth, perhaps only a few Mbps. In addition, production networks such as power, transportation, and autonomous driving communication networks also have low bandwidth requirements, also only a few Mbps, but they have strict requirements for reliability, latency, and hard isolation.
[0035] Therefore, OTN needs to be deployed down to metropolitan area networks and access networks. However, traditional OTN uses fixed time slots to divide services, supporting a minimum service granularity of 1.25Gbps and a maximum granularity of 100Gbps, which leads to bandwidth waste. To adapt to the development requirements of the new situation, standard improvements are needed. Granularity refers to the granularity of network resource allocation, i.e., the precision of network resource allocation. By adding an optical service unit (OSU) container, the signal can be split into N*2.6Mbps (N=1,2,3....), enabling service access and transmission requirements of various granularities from 2Mbps to 100Gbps.
[0036] To compete with OSU, China Mobile launched its Slicing Packet Network (SPN) fine granularity unit (FGU) technology. SPN FGU inherits the high-efficiency Ethernet core of SPN and integrates fine-grained slicing technology into the overall SPN architecture, providing a low-cost, refined, and hard-isolated small-granularity bearer pipeline. The SPN architecture of FGU is as follows: Figure 1As shown, FGU refines the granularity of hard slices from 5Gbps to 10Mbps to meet the needs of small-granularity service transport. At the plenary session of Study Group 15 (SG15), the Fine-Grained Optical Transport Network (fgOTN) was proposed, and the standard documents for both fgOTN and Fine-Grained Metropolitan Transport Network (fgMTN) were integrated into their respective service layer standard documents. A comparison of the fgOTN and fgMTN standard architectures is shown in Table 1.
[0037] Table 1: Comparison of fgOTN / fgMTN Standard Architectures
[0038]
[0039]
[0040] fgOTN is a native TDM technology with full TDM characteristics, perfectly inheriting the high reliability and deterministic latency features of SDH and OTN. The architecture of fgOTN is as follows: Figure 2 As shown, it adopts a fixed time slot allocation design with a bandwidth of 10Mbps, and supports various variable bit rate (VBR) and constant bit rate (CBR) services such as Ethernet (ETH), European 30-channel pulse code modulation (E1), and synchronous digital hierarchy (SDH).
[0041] Traditional OTN network nodes are designed for high bandwidth and long distances on trunk lines, resulting in high network construction costs and power consumption. Traditional OTN networks support services with a minimum granularity of 1.25G, facing efficiency challenges when carrying Sub-1G small-granularity services (i.e., services with granularity below 1G), making deployment at the access layer, such as power substations, difficult. fgOTN technology upgrades OTN network bandwidth, providing substations with integrated service access including voice, video, and IoT. Technically, either fgOTN or traditional OTN can be chosen, allowing for flexible selection based on bandwidth requirements. Simultaneously, fgOTN technology can be used as a backup plane for the power production network, with network bandwidth identical to that of the SDH production network, providing one-to-one support for production control services such as relay protection, stability maintenance, and dispatch automation.
[0042] Figure 3This diagram illustrates the architecture of standalone networks using Flexe / FGMTN / FGU and OTN / OSU / FGOTN technologies. It includes an aggregation layer and an access layer. The access layer directly connects to user computers and enables various network resources to access the network. The aggregation layer provides connectivity to the access layer and plays a role in data aggregation, transmission, management, and distribution. Figure 3 (a) Independent networking for PTN equipment using flexe / fgMTN / FGU technology. Figure 3 (b) Independent networking of OTN / OSU / fgOTN technology for OTN equipment. Figure 4 This is a schematic diagram of a hybrid network architecture using flexe / fgMTN / FGU and OTN / OSU / fgOTN technologies. Figure 4 (a) has a PTN aggregation layer and an OTN access layer. Figure 4 (b) has an OTN device as the aggregation layer and a PTN device as the access layer. Figure 5 This diagram illustrates the structure of a hybrid network using flexe / fgMTN / FGU and OTN / OSU / fgOTN technologies. It includes Customer Premises Equipment (CPE) and Power Sourcing Equipment (PSE). The CPE is used for user terminals to access the network, while the PSE provides power and data transmission for various devices in the network. Figure 5 (a) The CPE devices in the flexe / fgMTN / FGU network form a hybrid network with the OTN / OSU / fgOTN optical network and equipment. Figure 5 (b) The CPE equipment in the OTN / OSU / fgOTN optical network forms a hybrid network with the flexe / fgMTN / FGU optical network and equipment.
[0043] In order to solve Figure 4 or Figure 5 In China, PTN and OTN devices can communicate with each other in different networks. There are usually two ways to achieve this: Method 1 and Method 2.
[0044] Implementation method 1: such as Figure 6 As shown, the protocol conversion network conversion device enables interoperability between flexe / fgMTN / FGU (including flexe / SDH / Ethernet / FC / CBR services) and OTN / OSU / fgOTN service interfaces. However, for... Figure 4 and Figure 5 In hybrid networking scenarios, it is necessary to redevelop protocol conversion network equipment to enable interoperability between different optical networks, which leads to increased development costs.
[0045] Implementation method two: such as Figure 7 As shown, different service adapter boards enable interoperability between Flexe / fgMTN / FGU (including Flexe / SDH / Ethernet / FC / CBR services) and OTN / OSU / fgOTN services. However, OTN equipment requires client-side adaptation mapping for different client-side services, necessitating the creation of various service adapter boards to map Flexe / SDH / Ethernet / FC / CBR services onto different OTN boards, thus addressing diverse client-side needs. This implementation method of different service adapter boards places higher demands on OTN-side equipment, resulting in complex equipment implementation and numerous service adapter boards.
[0046] Based on this, this application provides an optical module that enables PTN and OTN devices to communicate with each other in different optical networks, while reducing the scale cost of the product.
[0047] For example, the optical module provided in this application embodiment includes an optoelectronic receiving unit, a demapping unit, and a service framing unit; the optoelectronic receiving unit is used to: receive a first data frame from a packet transport network (PTN) device through a first interface; the demapping unit is used to: perform demapping processing on the first data frame to obtain the service flow of the first data frame; the service framing unit is used to: perform OTN framing processing on the service flow of the first data frame to obtain a first OTN frame, and send the first OTN frame to the OTN device through a second interface.
[0048] In one possible implementation, the optical module further includes a service deframe unit, a mapping unit, and an optoelectronic transmission unit. The service deframe unit is used to: receive a second OTN frame from an OTN device through a second interface, and perform deframe processing on the second OTN frame to obtain the service flow of the second OTN frame. The mapping unit is used to: perform mapping processing on the service flow of the second OTN frame to obtain a second data frame. The first optoelectronic transmission unit is used to: send the second data frame to a PTN device through a first interface. Exemplarily, the optical module provided in this application embodiment can be a first optical module or a second optical module. When the optical module provided in this application embodiment is a first optical module, the first interface can be an external interface (referred to as the first external interface for ease of description), and the second interface can be an internal interface (referred to as the first internal interface for ease of description). The first internal interface is the insertion interface for the first optical module to connect to the OTN device, and the first external interface is the service interface for interfacing with the PTN device. When the optical module provided in this application embodiment is a second optical module, the aforementioned second interface can be an external interface (referred to as the second external interface for ease of description), and the aforementioned first interface can be an internal interface (referred to as the second internal interface for ease of description). The second internal interface is the insertion interface for the second optical module to connect to the PTN device, and the second external interface is the service interface for interfacing with the OTN device. In this application, "internal interface" and "external interface" are described from the perspective of the optical module. When the optical module is inserted into a device, the insertion interface is the internal interface, while the interface for communicating with the peer device is the external interface.
[0049] The first optical module and the second optical module will be described in detail below.
[0050] Figure 8 This is a schematic diagram of the structure of the first optical module provided in an embodiment of this application. Figure 8 As shown, the first optical module includes: a first internal interface 801, a first optoelectronic receiving unit 802, a first demapping unit 803, a first service framing unit 804, and a first overhead (OH) insertion unit 805. The first optical module is connected to the OTN device through the first internal interface 801. The first OH insertion unit 805 can be housed within the first service framing unit 804; that is, the function of the first OH insertion unit 805 can be performed by the first service framing unit 804. Figure 8 The example shown uses the first service group frame unit 804 and the first OH insertion unit 805 configured separately. The first internal interface 801 can be a gold finger interface or other interfaces, such as a cable interface.
[0051] The first optoelectronic receiving unit 802 in the first optical module is used to receive a first data frame from the PTN device through a first external interface. The first demapping unit 803 in the first optical module is used to identify the first data frame and perform demapping processing to obtain the service flow of the first data frame. The service flow of the first data frame reflects service data from service interfaces such as Flexe / SDH / Ethernet / FC / CBR services; and optionally, it also obtains corresponding operation administration and maintenance (OAM) / OH data. The first service framing unit 804 in the first optical module is used to perform OTN framing processing on the service flow of the first data frame to obtain a first OTN frame. For example, it encapsulates the data in the service flow of the first data frame into a frame of a certain format (i.e., the first OTN frame) according to the OTN standard protocol and sends the first OTN frame to the OTN device through the first internal interface 801. Optionally, the encapsulated data may also include OAM / OH data. The first OH insertion unit 805 is used to insert overhead information (i.e. OAM / OH data) during the framing process. The overhead information refers to the additional information added during data transmission, in addition to the actual user data, to ensure correct data transmission, synchronization, control, and other purposes.
[0052] The first optical module further includes: a first service deframe unit 808, a first OH extraction unit 809, a first mapping unit 807, and a first photoelectric transmission unit 806. The first OH extraction unit 809 can be housed within the first service deframe unit 808; that is, the function of the first OH extraction unit 809 can be executed by the first service deframe unit 808. Figure 8 The illustration uses a separate configuration of the first service deframe unit 808 and the first OH extraction unit 809 as an example. The first service deframe unit 808 in the first optical module is used to: receive a second OTN frame from the OTN device through the first internal interface 801, perform deframe processing on the second OTN frame to obtain the service flow of the second OTN frame; that is, to decapsulate the first OTN frame into a set of data (i.e., the service flow of the second OTN frame). The first OH extraction unit 809 is used to identify and extract overhead information from the received data frame structure (i.e., the second OTN frame) during the deframe process. The first mapping unit 807 of the first optical module is used to: perform mapping processing on the service flow of the second OTN frame to obtain a second data frame; the first optoelectronic transmission unit 806 of the first optical module is used to: send the second data frame to the PTN device through the first external interface.
[0053] The first data frame or the second data frame is any one of the following: Flexe data frame, SDH data frame, Ethernet data frame, Flow Control (FC) data frame, Constant Bit Rate (CBR) data frame; the first OTN frame or the second OTN frame is any one of the following: Optical Transform Unit k (OTUk frame) with standard rate k, Optical Transport Unit Cn (OTUCn) frame, Flexible Optical Transport Network (Flex OTN-n, FlexO-n) frame.
[0054] One possible implementation is that the first optical module can be inserted into the first internal interface of the first optical module. Figure 9 On OTN devices in a hybrid network, such as Figure 9 As shown. The first optical module described above can also be applied to... Figure 4 (a) In hybrid networking equipment using flexe / fgMTN / FGU technology and OTN / OSU / fgOTN technology, for example, Figure 4 (a) The PTN equipment in the aggregation layer can be connected to the OTN equipment in the access layer through the first optical module to achieve interoperability between the flexe / SDH / Ethernet / FC / CBR of the aggregation layer and the OTN service interface of the access layer. Figure 4 In (a), the flexe / fgMTN / FGU device connects to the OTN PSE via the first optical module to enable interoperability between flexe / SDH / Ethernet / FC / CBR and the OTN service interfaces of the access layer. This first optical module can also be applied to... Figure 4 In (b), for example, Figure 4 (b) The PTN equipment in the access layer can be connected to the OTN equipment in the aggregation layer through the first optical module to achieve interoperability between the flexe / SDH / Ethernet / FC / CBR of the access layer and the OTN service interface of the aggregation layer. Figure 4(b) The flexe / fgMTN / FGU device connects to the OTN / OSU / FgOTNCPE device through the first optical module to achieve interoperability between the access layer's flexe / SDH / Ethernet / FC / CBR and OTN service interfaces. The specific implementation is as follows: The first optical module receives a first data frame corresponding to the Flexe / SDH / Ethernet / FC / CBR service from the PTN device through a first external interface, demaps the first data frame to a first OTN frame corresponding to the OTU25 / OTU50 / OTUk / OTUCn / FlexO service on the OTN device, and sends the first OTN frame to the OTN device through a first internal interface; or, it receives a second OTN frame corresponding to the OTU25 / OTU50 / OTUk / OTUCn / FlexO service on the OTN device through the first internal interface, maps the second OTN frame to a second data frame corresponding to the Flexe / SDH / Ethernet / FC / CBR service on the PTN device, and sends the second data frame to the PTN device through the first external interface, thereby achieving network interconnection. The first external interface can be any of the following: Flexe interface, SDH interface, Ethernet interface, FC interface, or CBR interface; the first internal interface can be any of the following: OTN... OTUk interface, OTUCN interface, FlexO-n interface; PTN device is a router or switch device at the aggregation layer, OTN device is a router or switch device at the access layer, or OTN device is a router or switch device at the aggregation layer, PTN device is a router or switch device at the access layer.
[0055] In one possible implementation, the aforementioned first optical module can also be applied to access layer or user-side equipment in a hybrid network, such as... Figure 10 , Figure 5 (a) and Figure 5 As shown in (b), it includes CPE equipment and PSE equipment. Figure 5 In (a), the CPE is an OTN / FgOTN device (OTN / OSU / fgOTN technology), and the PSE device is a PTN device (flexe / fgMTN / FGU technology). The CPE device can achieve interoperability between flexe / fgMTN / FGU and OTN / FgOTN through the first optical module, enabling the OTN / FgOTN device CPE (OTN / OSU / fgOTN technology) to access the flexe / fgMTN / FGU optical network. Figure 5(b) In this context, the CPE is a PTN device (flexe / fgMTN / FGU technology) and the PSE is an OTN device (OTN / OSU / fgOTN technology). The OTN PSE device can achieve interoperability between flexe / fgMTN / FGU and OTN / FgOTN through the first optical module. In this way, a fast network can be set up without replacing the PSE device or changing the CPE device, thereby saving costs and facilitating access.
[0056] exist Figure 10 , Figure 5 (a) and Figure 5 (b) In the network topology, the aforementioned first optical module is used to achieve network interconnection between PTN and OTN devices. The first external interface of the first optical module covers various CBR service interfaces such as Flexe / fgMTN / FGU, FC, Ethernet, SDH, and E1, allowing for smaller granular access and interconnection with OTN devices, thereby reducing costs. For Figure 5 The CPE device in (a) enables rapid adaptation of its OTN / FgOTN interface to various CBR service interfaces such as Flexe / fgMTN / FGU, FC, Ethernet, SDH, and E1 by inserting a first optical module. This achieves flexible access for the CPE, reduces the complexity of CPE design, and increases scalability. Compared to existing protocol conversion network devices, the first optical module is lower in cost and offers more flexible access. Figure 5 (b) The CPE device can quickly adapt the OTN / FgON interface on the OTN device to various CBR service interfaces such as Flexe / fgMTN / FGU, FC, Ethernet, SDH, and E1 by inserting the first optical module into the OTN device in the access layer and aggregation layer, thereby realizing the interconnection between the CPE device and the OTN device.
[0057] This application embodiment also provides a system for network interconnection of optical modules. The system includes a PTN device, an OTN device, and the aforementioned first optical module. The first optical module is connected to the OTN device through a first internal interface. The PTN device is used to send a first data frame. The first optical module is used to receive the first data frame from the PTN device through a first external interface, process the first data frame into a first OTN frame, and send the first OTN frame to the OTN device through the first internal interface. The OTN device is used to receive the first OTN frame from the first optical module.
[0058] In one possible implementation, the OTN device is further configured to: transmit a second OTN frame; the first optical module is further configured to: receive the second OTN frame from the OTN device through a first internal interface, process the second OTN frame into a second data frame, and transmit the second data frame to the PTN device through a first external interface; the PTN device is further configured to: receive the second data frame from the first optical module through the first external interface of the first optical module.
[0059] Figure 11 This is a schematic diagram of the structure of the second optical module provided in an embodiment of this application. Figure 11 As shown, the second optical module includes: a second internal interface 1101, a second optoelectronic receiving unit 1102, a second mapping unit 1103, a second service deframe unit 1104, and a second OH extraction unit 1105. The second optical module is connected to the PTN device through the second internal interface 1101. The second OH extraction unit 1105 can be housed within the second service deframe unit 1104; that is, the function of the second OH extraction unit 1105 can be performed by the second service deframe unit 1104. Figure 11 The illustration uses the second service deframe unit 1104 and the second OH extraction unit 1105 as separate configurations as an example. The second internal interface 1101 can be a gold finger interface or other interfaces, such as a cable interface.
[0060] The second optoelectronic receiving unit 1102 of the second optical module is used to: receive a third OTN frame from the OTN device through a second external interface; the second service deframe unit 1104 of the second optical module is used to: perform deframe processing on the third OTN frame to obtain the service stream of the third OTN frame and the extracted OH; the second mapping unit 1103 of the second optical module is used to: perform mapping processing on the service stream of the third OTN frame to obtain a third data frame, and send the third data frame to the PTN device through a second internal interface.
[0061] The second optical module further includes: a second service framing unit 1108, a second OH insertion unit 1109, a second demapping unit 1107, and a second optoelectronic transmission unit 1106. The second OH insertion unit 1109 can be housed within the second service framing unit 1108; that is, the function of the second OH insertion unit 1109 can be performed by the second service framing unit 1108. Figure 11The illustration uses the second service framing unit 1108 and the second OH insertion unit 1109 as separate configurations. The second demapping unit 1107 of the second optical module is used to: receive a fourth data frame from the PTN device through the second internal interface, perform demapping processing on the fourth data frame to obtain the service flow and OAM / OH flow of the fourth OTN frame; the second service framing unit 1108 of the second optical module is used to: perform OTN framing processing on the service flow of the fourth OTN frame to obtain the fourth OTN frame; the second optoelectronic transmission unit 1106 of the second optical module is used to: send the fourth OTN frame to the OTN device through the second external interface; wherein, the third or fourth data frame is any one of the following: Flexe data frame, SDH data frame, Ethernet data frame, FC data frame, CBR data frame; the third or fourth OTN frame is any one of the following: OTUk frame, OTUCn frame, FlexO-n frame.
[0062] One possible implementation is that the second optical module can be inserted into the second internal interface of the second optical module. Figure 12 On PTN devices in a hybrid network, such as Figure 12 As shown, the aforementioned second optical module can also be applied to... Figure 4 (a) In the hybrid networking equipment of flexe / fgMTN / FGU technology equipment and OTN / OSU / fgOTN technology equipment Figure 4 In (a), the OTN equipment in the access layer can be connected to the PTN equipment in the aggregation layer through a second optical module to enable interoperability between the flexe / SDH / Ethernet / FC / CBR of the aggregation layer and the OTN service interface of the access layer. Figure 4 In (a), the OTN PSE in the access layer connects to the OTN / OSU / fgOTN CPE via a second optical module to enable interoperability between flexe / SDH / Ethernet / FC / CBR and the OTN service interface in the access layer. This second optical module can be applied to... Figure 4 In (b), Figure 4 (b) The OTN equipment in the aggregation layer can be connected to the PTN equipment in the access layer through a second optical module to enable interoperability between the flexe / SDH / Ethernet / FC / CBR of the access layer and the OTN service interface of the aggregation layer. Figure 4(b) The OTN / OSU / FgOTN equipment is connected to the Flexe / fgMTN / FGU PSE through the second optical module to achieve interoperability between the access layer's flexe / SDH / Ethernet / FC / CBR and OTN service interfaces. The specific implementation is as follows: The second optical module receives the third OTN frame corresponding to the OTU25 / OTU50 / OTUk / OTUCn / FlexO service on the OTN device through the second external interface, maps the third OTN frame to the third data frame corresponding to the Flexe / SDH / Ethernet / FC / CBR service on the PTN device, and sends the third data frame to the PTN device through the second internal interface; or, the second optical module receives the fourth data frame corresponding to the Flexe / SDH / Ethernet / FC / CBR service on the PTN device through the second internal interface, demaps the fourth data frame to the fourth OTN frame corresponding to the OTU25 / OTU50 / OTUk / OTUCn / FlexO service on the OTN device, and sends the fourth OTN frame to the OTN device through the second external interface, thereby realizing network interconnection. The second external interface is any one of the following: OTN OTUk interface, OTUCn interface, FlexO-n interface; the second internal interface can be any of the following: Flexe interface, SDH interface, Ethernet interface, FC interface, CBR interface; the PTN device is a router or switch device at the aggregation layer, and the OTN device is a router or switch device at the access layer, or the OTN device is a router or switch device at the aggregation layer, and the PTN device is a router or switch device at the access layer.
[0063] In one possible implementation, the aforementioned second optical module can also be applied to access layer or user-side equipment in a hybrid network, such as... Figure 13 , Figure 5 (a) and Figure 5 As shown in (b), it includes CPE equipment and PSE equipment. Figure 5 In (a), the CPE is an OTN / FgOTN device (OTN / OSU / fgOTN technology), and the PSE device is a PTN device (flexe / fgMTN / FGU technology). The OTN PSE device can achieve interoperability between flexe / fgMTN / FGU and OTN / FgOTN through a second optical module. Figure 5(b) In this context, the CPE is a flexe / fgMTN / FGU device (flexe / fgMTN / FGU technology), and the PSE device is an OTN device (OTN / OSU / fgOTN technology). The CPE device can achieve interoperability between flexe / fgMTN / FGU and OTN / FgOTN through a second optical module, enabling the flexe / fgMTN / FGU device CPE (flexe / fgMTN / FGU technology) to access the OTN / OSU / fgOTN optical network, thereby completing rapid networking without replacing the PSE device or changing the CPE device, thus saving costs and facilitating access.
[0064] The aforementioned second optical module enables network interconnection between PTN and OTN devices. The second internal interface of the second optical module covers various CBR service interfaces such as Flexe / fgMTN / FGU, FC, Ethernet, SDH, and E1, allowing for smaller granular access and interconnection with PTN devices. Figure 5 The CPE device in (a) can quickly adapt various CBR service interfaces such as Flexe / fgMTN / FGU, FC, Ethernet, SDH, and E1 on the PTN device to the OTN / FgOTN interface by inserting a second optical module into the PTN device at the access layer and aggregation layer, thus achieving interconnection between the CPE device and the PTN device. Figure 5 (b) The CPE device can quickly adapt various CBR service interfaces such as Flexe / fgMTN / FGU, FC, Ethernet, SDH, and E1 on the CPE device to the OTN / FgOTN interface by inserting a second optical module, thereby achieving flexible access for the CPE, reducing the complexity of CPE design, and increasing scalability. Compared with existing protocol conversion network devices, the second optical module has a lower cost and more flexible access.
[0065] This application also provides a system for network interconnection via optical modules. The system includes a PTN device, an OTN device, and the aforementioned second optical module. The second optical module is connected to the PTN device via a second internal interface. The OTN device is used to: transmit a third OTN frame; the second optical module is used to: receive the third OTN frame from the OTN device, process the third OTN frame into a third data frame, and transmit the third data frame to the PTN device via the second internal interface; the PTN device is further used to: receive the third data frame from the second optical module via the second internal interface of the second optical module.
[0066] In one possible implementation, the PTN device is further configured to: transmit a fourth data frame; the second optical module is configured to: receive the fourth data frame from the PTN device through a second internal interface, process the fourth data frame into a fourth OTN frame, and transmit the fourth OTN frame to the OTN device through a second external interface; the OTN device is configured to: receive the fourth OTN frame from the second optical module through the second external interface of the second optical module.
[0067] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0068] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0069] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0070] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0071] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. An optical module, characterized in that, The optical module includes: an optoelectronic receiving unit, a demapping unit, and a service framing unit; The photoelectric receiving unit is used to receive a first data frame from a packet transport network (PTN) device through a first interface. The demapping unit is used to demapping the first data frame to obtain the service flow of the first data frame; The service framing unit is used to perform OTN framing processing on the service flow of the first data frame to obtain a first OTN frame, and send the first OTN frame to the OTN device through the second interface.
2. The optical module according to claim 1, characterized in that, The optical module further includes a first service deframe unit, a first mapping unit, and a first photoelectric transmission unit; The first service deframe unit is used to receive a second OTN frame from the OTN device through the second interface, perform deframe processing on the second OTN frame, and obtain the service flow of the second OTN frame; The first mapping unit is used to map the service flow of the second OTN frame to obtain the second data frame; The first photoelectric transmitting unit is used to send the second data frame to the PTN device through the first interface.
3. The optical module according to claim 1, characterized in that, The demapping unit is also used to obtain overhead OH information; The optical module further includes: a first OH insertion unit, used to insert the OH information during the framing process, wherein the first OTN frame includes the OH information.
4. The optical module according to any one of claims 1-3, characterized in that, The first interface is an external interface, and the second interface is an internal interface. The optical module is connected to the OTN device through the second interface.
5. The optical module according to any one of claims 1-3, characterized in that, The first interface is an internal interface, and the second interface is an external interface. The optical module is connected to the PTN device through the first interface.
6. The optical module according to any one of claims 1-3, characterized in that, The PTN device is an aggregation layer router or switch, and the OTN device is an access layer router or switch; or... The OTN device is a router or switch at the aggregation layer, and the PTN device is a router or switch at the access layer; or... The PTN device is an access layer PSE device, and the OTN device is a CPE device; or... The PTN device is a CPE device, and the OTN device is a PSE device for the access layer.
7. The optical module according to any one of claims 1-3, characterized in that, The second interface is any one of the following: OTN OTUk interface, OTUCn interface, FlexO-n interface; the first interface can be any one of the following: Flexe interface, SDH interface, Ethernet interface, FC interface, CBR interface.
8. The optical module according to any one of claims 1-3, characterized in that, The first data frame or the second data frame is any one of the following: Flexe data frame, SDH data frame, Ethernet data frame, FC data frame, CBR data frame; The first OTN frame or the second OTN frame is any one of the following: OTUk frame, OTUCn frame, or FlexO-n frame.
9. A system for achieving network interconnection via optical modules, characterized in that, The system includes: a PTN device, an OTN device, and an optical module as described in any one of claims 1 to 8; The PTN device is used to: send a first data frame; The optical module is used to: receive a first data frame from the PTN device through a first interface, process the first data frame into a first OTN frame, and send the first OTN frame to the OTN device through a second interface; The OTN device is used to: receive a first OTN frame from the optical module.
10. The system according to claim 9, characterized in that, The OTN device is also used to: send a second OTN frame; The optical module is also used to: receive the second OTN frame from the OTN device through the second interface, process the second OTN frame into a second data frame, and send the second data frame to the PTN device through the first interface; The PTN device is also used to: receive the second data frame from the optical module.