CN210444274U

CN210444274U - Backbone transmission network system

Info

Publication number: CN210444274U
Application number: CN201921674999.2U
Authority: CN
Inventors: 杨林慧; 孙少华
Original assignee: State Grid Corp of China SGCC; State Grid Qinghai Electric Power Co Ltd; Information and Telecommunication Branch of State Grid Qinghai Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Qinghai Electric Power Co Ltd; Information and Telecommunication Branch of State Grid Qinghai Electric Power Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-01
Anticipated expiration: 2029-09-30

Abstract

The application discloses backbone transmission network system adopts OTN transmission equipment to constitute, the system includes: each optical terminal multiplexing station device is deployed in a preset area and is communicated with each other through an optical cable link; the electric relay station is positioned between at least two optical terminal multiplexing station devices and is used for forwarding service requirements between the optical terminal multiplexing station devices; the optical amplification station equipment is connected with any one or more optical terminal multiplexing station equipment and is used for enhancing the power signal; and a matched power supply and wiring equipment are accessed to the OTN transmission equipment of which the power supply equipment does not meet the power supply condition. The method and the device solve the technical problems that in the prior art, the bearing capacity of a backbone transmission network of the power communication network is weakened along with the time, and the efficiency of processing various service demands is low.

Description

Backbone transmission network system

Technical Field

The application relates to the field of communication networks, in particular to a backbone transmission network system.

Background

In the prior art, all backbone optical transmission network transmission devices adopt SDH (Synchronous digital hierarchy) technology, and are carried by two sets of different optical transmission devices, and 9 optical fiber ring networks are built up in total by 2015, and mainly include a core ring network, a middle-western ring network, a western ring network and the like. The interconnection and intercommunication of a plurality of looped networks are realized by butting the light passing plates in a plurality of transformer substations, and the butting rate is 2.5G; the interconnection and intercommunication between the backbone transmission network and a secondary backbone transmission network are realized at a transformer substation and a converter station through light plate butt joint, and the butt joint rate is 2.5G. The backbone optical transmission network mainly converges service flows of various regions, and simultaneously bears production and operation services of a power grid, and mainly comprises relay protection, a security control device, a scheduling data network, scheduling exchange, an administrative exchange network, a video conference and data communication network services (mainly used for management information large-area services such as scheduling management, office automation, enterprise informatization, power marketing, video monitoring and the like).

The current situation of the data communication network is as follows: the data communication backbone network of the main area and the network integration corresponding to the first sub-area extend from the node corresponding to the first sub-area and the original boundary of the second aggregation point corresponding to the first sub-area, and backbone network boundary equipment is deployed in the local machine room corresponding to the second sub-area, so that the integration of the data communication backbone network and the original data network backbone area corresponding to the first sub-area is realized, wherein the data network backbone area corresponding to the first sub-area comprises the local node corresponding to the first sub-area, the local node corresponding to the second sub-area and the local transfer node which is connected with the main machine room corresponding to the second sub-area. The data communication backbone network PE is extended to the local machine room corresponding to the second sub-area through transformation, the backbone network PE originally arranged at the first sub-area and the second aggregation point corresponding to the first sub-area is converted into P equipment, the first sub-area and the second aggregation point corresponding to the first sub-area are correspondingly connected with the data communication backbone network to achieve one-hop direct connection among the P equipment, and the network structure is more reasonable.

In addition, the backbone optical transmission network in the prior art has many problems, which cannot meet the requirements: the transmission capacity is seriously insufficient, and 155M or more services are difficult to open; service configuration is disordered, and time division and space division cross services are more; the discrete services are more, and the utilization rate of port resources is seriously influenced; with frequent reconnection of the optical cable for primary power grid transformation, the topological structure is easy to change; the communication isolation between gateway network elements is difficult, and ECC storm is easy to occur, so that the large-area network element disconnection is caused; the network structure is unreasonable, so that the high-low-order cross utilization rate of part of the pivot nodes is extremely high, and the service can not be continuously opened.

In view of the above, it is urgently needed to establish a large-scale high-capacity backbone communication network to meet the increasing transmission of large-granule services. At present, because a transmission backbone network cannot provide bandwidth of 155M, it is also very difficult to open a large number of 2M channels from a large number of stations to a convergence point. Without building a backbone transport network, a large amount of 155M bandwidth required for the development of a scheduling data network cannot be provided.

In addition, because the bandwidth of the transmission channel SDH device of the current wide area network service is seriously insufficient, the operation mode is unreasonable, and multiple communication systems are frequently docked, the service path is unreasonable, the maintenance frequency affects the interruption thereof, the service path in the communication management system is incomplete to affect the index, and the operation and management risks are greatly increased.

Secondly, according to the disaster recovery requirement, the second aggregation node corresponding to the second sub-area is used as the disaster recovery node of the second sub-area scheduling center, when the core node of the scheduling center needs to be assumed to be invalid, the key service still has robustness, the channel capability of providing the speed of 10G or more is required to be provided between the second aggregation nodes corresponding to the second sub-area to be adjusted to the total area, and the geographic position distance between the two aggregation nodes is relatively long. At present, a new second aggregation node is planned to be built, but since a backbone transmission network based on the traditional SDH cannot provide a channel with a bandwidth of more than 155M, the location of the second aggregation node cannot be moved. In the aspects of emergency and disaster tolerance, the transmission network does not have bandwidth more than 155M, so that in the emergency situations of faults, overhaul and the like, the service cannot find a roundabout emergency route, and the safety and the reliability of the network are seriously influenced.

With the rapid development of power grids in recent years, communication backbone transmission networks have been unable to meet the requirements of various services, and there are many problems to be solved:

(1) the effective bandwidth of the SDH backbone transmission network based on the 10G ring network is only 5G, and even if ring network protection is not configured, important services also need to be configured with SNCP, so that the effective bandwidth is half lower. At present, the bandwidth of the backbone ring network is basically occupied, no spare VC4 exists, and 155M or more large-granule services cannot be configured. Many 155M services are forced to be carried on the protection time slot of the multiplex section ring network, and the small-particle 2M services also cannot be subjected to time slot planning, so that the defects of unreasonable service path, disordered time slot use, high cross capacity occupancy rate, accidental cross service interruption after ring network switching and the like are caused.

(2) The insufficient capacity of the backbone transmission network causes that a three-level backbone network and a four-level network cannot be distinguished in the communication network, the communication network gradually loses levels, a plurality of three-level important services are borne on optical cables and equipment with low four-level safety, the operation risk is high, and the difficulty in organizing various types of maintenance is high.

(3) Because the backbone transmission network can not meet the service requirement, the optimization and adjustment work of the transmission network structure is carried out for a plurality of times, the work of clearing the whole network discrete service, ECC subnet division and gateway optimization, looped network optimization, whole network service path timely slot planning and integration, whole network clock source configuration and clock tracking chain optimization and the like is carried out, the backbone transmission network is reluctantly used to the present after being optimized for a plurality of times, and the potential of optimization is not much.

In summary, the following steps: in the aspect of backbone transmission networks, network bandwidth cannot meet the increasing demand of informatization, and the bandwidth of the current communication network transmission backbone ring network is 10G, which can not meet the demand of power communication service on bandwidth capacity in the future.

The backbone communication network is an important bearing surface for connecting a plurality of communication services as a communication pivot.

The shortage problem of the transmission capacity of the backbone transmission network, which has been continuous for many years, has seriously influenced the communication network, and restricts the normal development of various works.

In view of the above problems, no effective solution has been proposed.

Disclosure of Invention

The embodiment of the application provides a backbone transmission network system, which is used for at least solving the technical problems that in the prior art, the bearing capacity of a backbone transmission network of a power communication network is weakened along with the passage of time, and the efficiency of processing various services is low.

According to an aspect of the embodiments of the present application, there is provided a backbone transmission network system, which is formed by using OTN transmission devices, and the system includes: each optical terminal multiplexing station device is deployed in a preset area and is communicated with each other through an optical cable link; the electric relay station is positioned between at least two optical terminal multiplexing station devices and is used for forwarding service requirements between the optical terminal multiplexing station devices; the optical amplification station equipment is connected with any one or more optical terminal multiplexing station equipment and is used for enhancing the power signal; and a matched power supply and wiring equipment are accessed to the OTN transmission equipment of which the power supply equipment does not meet the power supply condition.

Optionally, the system forms ring networks through different routes, wherein a plurality of intersecting rings form a corresponding ring network topology structure, and an intersection node between the ring networks is provided with a high-speed transmission circuit.

Optionally, the system classifies by type including: a protection switching structure and a protection structure; the type of the protection switching structure comprises an optical layer and an electrical layer, and the type of the protection switching structure comprises: linear protection and ring network protection; wherein the linear protection comprises at least one of: optical layer-based optical line protection, optical multiplexing section protection and optical channel protection, and electrical layer-based ODUk SNCP protection, wherein the ring network protection includes at least one of the following: optical wavelength sharing ring network protection based on an optical layer and ODUk ring network protection based on an electrical layer.

Optionally, the optical cable comprises: OPGW optical cable and ADSS optical cable of high voltage grade, wherein, the optical cable that does not satisfy the security condition deploys outside the looped netowrk.

Optionally, at the optical layer, the OTN transmission device is configured to transmit and process service data exceeding a predetermined value; at the electrical layer, the OTN transport device performs asynchronous mapping and multiplexing;

optionally, the channels of the optical terminal multiplexing station devices are divided into a plurality of service physical isolation regions based on different wavelength sequences.

Optionally, the optical terminal multiplexing station apparatus includes: the main circuit and the standby circuit use different routes according to optical cable resources.

Optionally, the network topology of the backbone transmission network system is subjected to topology layering to obtain a network topology structure with partitioned isolation.

Optionally, the system further comprises: the system comprises a network management system server and at least one appointed OTN transmission device, wherein the type of the network management system server comprises: a remote disaster backup network management server and a daily operation and maintenance management server.

Optionally, the network management system server is configured to: as a primary network element management system and as a standby subnet management system.

In the embodiment of the application, a plurality of optical terminal multiplexing station devices are adopted, each optical terminal multiplexing station device is deployed in a predetermined area, and each optical terminal multiplexing station device communicates with each other through an optical cable link; the electric relay station is positioned between at least two optical terminal multiplexing station devices and is used for forwarding service requirements between the optical terminal multiplexing station devices; the optical amplification station equipment is connected with any one or more optical terminal multiplexing station equipment and is used for enhancing the power signal; the system of the matched power supply and the distribution equipment is accessed into the OTN transmission equipment of which the power supply equipment does not meet the power supply condition, so that the technical effects of solving the problem of insufficient transmission bandwidth of a power communication network, improving the service bearing capacity and improving the service demand efficiency are achieved. And the technical problems that the bearing capacity of a backbone transmission network of the power communication network is weakened along with the time lapse, and the efficiency of processing various service demands is low in the prior art are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of an alternative backbone transmission network system according to an embodiment of the present application;

fig. 2 is a schematic diagram of an ODUk1+1 protection principle according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

First, some terms or terms appearing in the description of the embodiments of the present application are applicable to the following explanations:

the OTN is Optical, Transport, Network, Optical Transport Network, Transport Network based on wavelength division multiplexing technology in Optical layer organization Network, and is the next generation backbone Transport Network.

An optical path data unit mainly comprises an ODUk frame structure, an ODUk bit rate and bit rate tolerance.

SNCP: subnet connection protection means that a dedicated protection route is prearranged for a certain subnet connection, and once a subnet fails, the dedicated protection route takes over the transmission task in the whole network instead of the subnet.

OCH is the meaning of optical channels, namely, the wavelengths of different frequencies are different OCH channels.

Synchronous Digital Hierarchy (SDH), which is a technical system formed by multiplexing methods, mapping methods and related synchronization methods, provides corresponding-level information structures for transmission of Digital signals with different rates according to the recommendation definition of ITU-T.

OPGW Optical cable Optical Fiber Composite Overhead Ground Wire (also called Optical Fiber Composite Overhead Ground Wire). The optical fiber is placed in the ground wire of an overhead high-voltage transmission line to form an optical fiber communication network on the transmission line, and the structural form has the double functions of the ground wire and communication and is generally called an OPGW optical cable.

The ADSS optical cable is a full-medium self-supporting optical cable, is a nonmetal optical cable which is completely composed of medium materials, contains a necessary supporting system and can be directly hung on an electric power tower, is mainly used for a communication line of an overhead high-voltage transmission system and can also be used for a communication line in overhead laying environments such as lightning-prone zones and large spans.

SONET Synchronous Optical Network, Synchronous Optical Network.

Wavelength Division Multiplexing (WDM), which is a technique for merging optical carrier signals (carrying various information) with two or more different wavelengths together at a transmitting end via a Multiplexer (also called a combiner, Multiplexer) and coupling the merged signals into the same optical fiber of an optical line for transmission, at a receiving end, separating the optical carriers with various wavelengths via a Demultiplexer (also called a Demultiplexer or a Demultiplexer), and then further processing the separated optical carriers by an optical receiver to recover the original signals. This technique of simultaneously transmitting two or more optical signals of different wavelengths in the same optical fiber is called wavelength division multiplexing.

According to an aspect of the embodiments of the present application, a backbone transmission network system is provided, which is formed by OTN transmission devices, fig. 1 is a schematic structural diagram of an optional backbone transmission network system according to the embodiments of the present application, as shown in fig. 1: the system comprises: a plurality of optical terminal multiplexing station devices 12, electrical relay stations 14, optical amplification station devices 16.

The optical terminal multiplexing station equipment 12 is deployed in a predetermined area, and communicates with each other through an optical cable link;

an electrical relay station 14, located between at least two optical terminal multiplexing station devices, configured to forward service requirements between the optical terminal multiplexing station devices;

an optical amplification station device 16 connected to any one or more optical terminal multiplexing station devices for boosting the power signal; in addition, a matched power supply and wiring equipment can be accessed to the OTN transmission equipment of which the power supply equipment does not meet the power supply condition.

In some optional embodiments of the present application, 39 sets of OTN transmission devices may be constructed in the present application, wherein 36 sets of optical terminal multiplexing station (OTM) devices, 2 sets of electrical relay station (REG) devices, and 1 set of optical amplifier station (OLA) devices are added to a site of an OTN transmission device where a power supply device does not satisfy a power supply condition, and a matching power supply and a distribution device are added. And (3) configuring 40 waves by 10GOTN equipment, and respectively opening 1 10G circuit to the first aggregation point and the converter station (second aggregation point) by a plurality of communication sites in consideration of service capacity and service backup.

Optionally, the bandwidth of the backbone transport network should meet the future service development requirement, and consider providing an emergency bandwidth requirement for the superior transport network. A40-wave 10G system can be adopted, but the platform is 100G, when the future bandwidth is insufficient, a 100G board card can be directly inserted and placed on the platform, smooth evolution from the 10G system to the 100G system is realized, and mixed transmission of 10G channels and 100G channels can be realized.

According to the current situation of the machine room and the power supply, the occupied area of the current mainstream OTN equipment is not higher than that of the traditional SDH equipment, and the machine room area of the related station can be satisfied. However, the power consumption of the OTN device is large, the air switch requirement is generally a plurality of 63A, and a plurality of machine rooms need to be modified with capacity-expanding power supply devices and direct-current power distribution cabinets.

Optionally, based on technical advantages and a flexible networking mode of the OTN in the communication field, in order to meet transmission requirements of information wide area network construction and video conferencing, scheduling data network services, and the like, an OTN high-capacity backbone communication network is constructed in combination with the current situation of an optical fiber communication network. The whole network forms a ring network topology formed by a plurality of intersecting rings.

Optionally, the system forms ring networks through different routes, wherein a plurality of intersecting rings form a corresponding ring network topology structure, and an intersection node between the ring networks is provided with a high-speed transmission circuit. The high-speed transmission circuit may be the above-mentioned 10G circuit.

The scheme adopts a ring network topological structure formed by a plurality of intersecting rings, and the OTN optical transport network technology supports the access capability of large-particle services, and particularly has high-efficiency bearing capability on data services such as GE (general electric) and 10GE (general electric) services.

According to the estimation of the traffic, 1 10G circuit can be opened at the first aggregation point, which is embodied as 1 10G channel in the application, and is used for bearing large-particle services, and simultaneously, a 10G circuit is opened from each region to the second aggregation point of the converter station as a backup. The main circuit and the standby circuit can form protection for the service through the ring network route.

Optionally, considering the overall scheme planning, the channels of each communication station can be distinguished through different wavelength sequences, so as to ensure that the channels of each communication station do not conflict, ensure the service physical isolation of each communication station, and improve the service security; secondly, main and standby circuits of each communication station fully utilize the existing optical cable resources as much as possible to realize different routes, so that the risk caused by optical cable interruption is reduced; the network topology is simplified again, the topology is layered, the simpler and clearer topology is more beneficial to later maintenance, and the maintenance pressure is reduced; and finally, considering the bottleneck of the path, and distributing the service of each communication station to different paths, thereby avoiding the hidden danger caused by the overlarge load of the service carried by the same path.

Optionally, in the scheme based on the OTN, the protection switching may be divided into an optical layer and an electrical layer according to the layer where the protection switching occurs. The protection structure can be divided into two types of linear protection and ring network protection. Linear protection includes optical layer-based optical line protection, optical multiplex section protection and optical channel protection, and electrical layer-based ODUk SNCP protection. The ring network protection comprises optical wavelength sharing ring network protection based on an optical layer and ODUk ring network protection based on an electrical layer.

In the application, the established service particles are mainly ODUk sub-wavelength services, and all services can be protected by SNCP 1+1 based on ODUk. The ODUk SNCP 1+1 protection does not need APS switching protocol, and can be used in any physical structure (i.e. mesh, ring and hybrid structures), and there is no fundamental limitation on the number of network elements in the sub-network connection. The protection is based on a single ODUk and is mainly used for different sources or different sink situations of different ODUk branches in the same OCh.

SNCP subnet connection protection can be used at the OUUk layer, SNCP is a dedicated point-to-point protection mechanism, and can be used in any physical topology (mesh, ring, or a mixture of both) to protect part or all of the network nodes. Similar to SDH, subnet connection protection can be seen as a protection method where the detection of a failure condition is at the service layer network, sub-layer or other transport network, and the action of protection switching occurs at the client layer network.

Fig. 2 is a schematic diagram of an ODUk1+1 protection principle; as shown in fig. 2: in fig. 2, two OTM stations have a main optical channel and a standby optical channel in between; each OTM station can comprise a branch circuit board, an electric cross unit and two lines OUT, wherein the two lines OUT in each OTM station are respectively connected with the electric cross unit, data interaction is carried OUT between the electric cross unit and the branch circuit board, and the branch circuit board carries OUT data interaction with a client side. In addition, lines OUT between different OTM stations are connected by the active optical channel and/or the standby optical channel.

Optionally, the network in the present application may carry large-granule traffic transmission over a large area, and the optical cable may be an OPGW optical cable with a high voltage class as much as possible, and may be placed outside the ring network as much as possible without reliability and safety. According to the fiber core resource of the existing optical cable, an ADSS optical cable is laid.

optionally, the main services of the backbone transmission network are a large-particle scheduling data network and a data communication network, and the method is suitable for selecting an OTN technology to construct a backbone network.

Alternatively, the OTN technology is an important transport layer technology for a high-speed next generation transport network, and commercial technical conditions are mature. OTN combines the advantages of conventional SDH/SONET and WDM, while maintaining their compatibility capabilities. At the optical layer, the OTN can implement transmission and processing of traffic data exceeding a predetermined value, such as transmission and processing of large-grain data, similar to a WDM system; at the electrical layer, OTN uses asynchronous mapping and multiplexing, so that critical interleaving can employ the most economical spatial interleaving technique. Over the years, the OTN technology has matured, and the WDM equipment with OTN interface has been widely used. OTN is as applicable to metropolitan and long-distance WDM networks as possible. The absorption of the advantages of the SDH technology enables the OTN to well meet the requirements of broadband service development. The OTN is more suitable for the adaptation of any client service (including SDH, ATM, Ethernet, SAN and Video services); asynchronous mapping and asynchronous multiplexing are adopted, the whole system network synchronization is not needed, and the limitation caused by synchronization is eliminated; is more suitable for GE and 10GE treatment.

Optionally, with the advance of all-IP service access, more and more TDM circuits will be IP-ized, and the particles for transmitting services at the core layer will be larger and larger, and will gradually evolve from the previous 2M and 155M to GE and 2.5Gb/s, so that the network technology of the OTN is also required to provide powerful support not only in terms of service bearer, but also to have substantial breakthrough in terms of network flexible configuration, service protection function at the telecom level, and the like. The OTN is also very different from the conventional wdm system in terms of network planning and network operation. Therefore, great research and development are needed in the aspects of network architecture building, circuit scheduling configuration protection mode setting and future network evolution.

Optionally, the rapid development of IP services makes broadband requirements more and more vigorous, and although SDH technology and WDM technology are mature, relatively more deployed and widely applied, it is not careful to meet the flexible scheduling and protection requirements of large broadband, and although SDH technology has flexible scheduling and a network restoration protection function, it has a small granularity, mainly uses VC-4 service particles, and does not have a large capacity scheduling capability; the large capacity of WDM technology can meet the high bandwidth transmission requirements, but the flexibility is low and the cost of protection based on optical channels is high. The OTN technology combines the technical advantages of SDH and WDM, has flexible scheduling capability of various particles, including ODU1(2.5Gb/s), ODU2(10Gb/s) and ODU3(40Gb/s), is not limited by transmission distance and wavelength continuity, and simultaneously has good network recovery and protection capability to provide corresponding protection for services with wavelength and sub-wavelength. The ODUk cross scheduling based capability of the OTN equipment enables the existing network structure to be optimized to a great extent, and network resource cost is saved.

Optionally, considering the overall scheme planning, the channels of each communication station can be distinguished through different wavelength sequences, so that the channels of each communication station are guaranteed not to conflict, the service physical isolation of each communication station is guaranteed, and the service safety is improved;

optionally, the optical terminal multiplexing station apparatus includes: the main circuit and the standby circuit use different routes according to optical cable resources. Namely, the main circuit and the standby circuit can form protection for the service through the ring network route.

Optionally, the main circuit and the standby circuit of each communication station can make full use of the existing optical cable resources as much as possible to realize different routes, and risks caused by optical cable interruption are reduced.

Specifically, the network topology can be simplified again, the topology is layered, the simpler and clearer topology is more beneficial to later maintenance, and the maintenance pressure is reduced; and finally, considering the bottleneck of the path, and distributing the service of each communication station to different paths, thereby avoiding the hidden danger caused by the overlarge load of the service carried by the same path.

Optionally, the system further comprises: the system comprises a network management system server and at least one appointed OTN transmission device, wherein the type of the network management system server comprises: the remote disaster recovery backup network management server and the daily operation and maintenance management server; the hardware 1+1 hot standby is configured as an active network management system and a standby network management system to form a remote disaster recovery backup network management system. 1 client can be configured at different communication sites, regulation and control centers and used for daily operation and maintenance management of the communication sites.

In some optional embodiments of the present application, because the scale of the network in the present application is large, in the scheme of the present application, 1 set of network management system servers including the active network element management system and the standby subnet management system may also be configured in both the communication station and the communication building, and the hardware 1+1 hot standby is configured as the active network management system and the standby network management system, so as to form a remote disaster recovery backup network management system. And 1 client is configured at each communication site and a regulation and control center and used for daily operation and maintenance management of each communication site.

Optionally, each communication station in the present application may be a communication station in a preset area.

Optionally, the network management of the OTN system adopts a hierarchical management mode. The network management of the OTN system is mainly divided into three layers from the aspect of logical function: a network element layer, a network element management layer and a network management layer. The network element layer mainly aims at an OTN physical network element and generally receives the management of a network element management layer. The network element management layer mainly faces to the OTN network element, and an OTN network Element Management System (EMS) directly manages and controls the OTN equipment and is responsible for managing and operating various network elements in the OTN network. The network management layer is mainly oriented to the OTN and is responsible for managing the OTN in the managed management area and emphasizing the end-to-end service management capability. The sub-network management system (SNMS) is located at the network management layer. The SNMS or the EMS can be unified on the same physical platform or can be independent systems. The SNMS and the EMS can be accessed to an OTN network management system with higher level, and the whole-course end-to-end management of the whole network of a plurality of manufacturers can be realized.

With the improvement of the power grid informatization degree, the communication backbone network service can present the characteristics of high reliability, omnibearing, diversification and broadband:

(1) high reliability. The construction of extra-high voltage and large power grids puts higher requirements on the capability of driving the large power grids to safely, stably and economically operate, the operation and control of the power grids have the characteristics of online analysis, dynamism and overall process of power grid operation analysis, intelligentization of a power grid dispatching technology support system, lean power grid operation management and integration of main and standby dispatching operation, and the power grid needs more reliable and high-quality communication service guarantee for power communication.

(2) And (4) omnibearing performance. The construction of the intelligent power grid is further promoted, and the intellectualization of each link of transmission, transformation, regulation, allocation and utilization is gradually realized. The intelligent construction of the power grid requires all links of the power grid intelligence and information construction to provide all-round communication support.

(3) Diversification. The power grid service carried by the communication network shows the trend of service diversification, and more power grid production, operation, power grid intellectualization and value-added services are carried by the power communication network, such as: distribution network automation, distribution network operation monitoring, marketing business and the like. The trend of service diversification puts higher requirements on the bearing capacity, service access flexibility, service differentiation service level and the network management and control capacity of the power communication network.

(4) The bandwidth is increased. With the construction and the promotion of panoramic visualization of a power grid, SG-ERP and a data disaster tolerance center, a large amount of large-particle services for data communication are borne by a power communication network, the services have the characteristics of being broadband and networked, and the deployment and the application of the service system put higher requirements on the service bearing capacity and the transmission performance of the power communication network. And realizing double-trillion connection from the site corresponding to each second sub-area to the site wide area network corresponding to the first sub-area.

The scheme in the application can solve the problem of serious shortage of transmission bandwidth of the communication network by developing the construction of a high-capacity backbone communication network. Possesses outstanding efficiency and cost advantage:

(1) full service access and high capacity transfer. The OTN has the transmission capacity of hundreds of G to T bits, supports the access capability of large-granule services, supports long-span transmission and has high-efficiency bearing capability for GE and 10GE data services. Far exceeding the traffic carrying capacity of conventional SDH networks.

(2) And optical cable resources are saved. High-voltage level OPGW optical cable resources in the power communication network are precious, capacity expansion is difficult to establish after a circuit is put into operation, and the optical cable resources are increasingly tense along with the great increase of the number of communication equipment in service surge. The OTN transmission is based on the wavelength division multiplexing technology, and 40, 80 or more wavelength services are converged into one optical fiber for transmission, so that the use efficiency of optical cable resources is greatly improved.

The construction of a high-capacity backbone communication network of the OTN technology is a technical scheme which is most suitable for solving the problem of insufficient bandwidth requirement in the current technical conditions.

At present, the construction of backbone communication network lags behind the high-speed growth of various data information such as information wide area network, scheduling data network and the like, and the situation of 'big two ends and narrow middle' is formed. In order to meet the requirement of 'high speed, reliability and intelligence' of a channel caused by explosive growth of data information and accelerate the development of a backbone communication network, it is necessary to build the backbone communication network which is developed in coordination with the data information network.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A backbone transmission network system is characterized in that the system is composed of OTN transmission equipment, and the system comprises:

each optical terminal multiplexing station device is deployed in a preset area and is communicated with each other through an optical cable link;

the electric relay station is positioned between at least two optical terminal multiplexing station devices and is used for forwarding service requirements between the optical terminal multiplexing station devices;

the optical amplification station equipment is connected with any one or more optical terminal multiplexing station equipment and is used for enhancing the power signal;

and a matched power supply and wiring equipment are accessed to the OTN transmission equipment of which the power supply equipment does not meet the power supply condition.

2. The system of claim 1, wherein the system forms ring networks through different routes, wherein a plurality of intersecting rings form a corresponding ring network topology, and wherein a junction node between the ring networks provides a high speed transmission circuit.

3. The system of claim 1, wherein the system classifies by type comprising: a protection switching structure and a protection structure;

the type of the protection switching structure comprises an optical layer and an electrical layer, and the type of the protection switching structure comprises: linear protection and ring network protection;

wherein the linear protection comprises at least one of: optical layer-based optical line protection, optical multiplexing section protection and optical channel protection, and electrical layer-based ODUk SNCP protection, wherein the ring network protection includes at least one of the following: optical wavelength sharing ring network protection based on an optical layer and ODUk ring network protection based on an electrical layer.

4. The system of claim 3, wherein the fiber optic cable comprises: OPGW optical cable and ADSS optical cable of high voltage grade, wherein, the optical cable that does not satisfy the security condition deploys outside the looped netowrk.

5. The system of claim 3,

at the optical layer, the OTN transmission device is configured to transmit and process service data exceeding a predetermined value;

at the electrical layer, the OTN transport device performs asynchronous mapping and multiplexing.

6. The system of claim 1 wherein the channels of each optical terminal multiplexing station device are partitioned into a plurality of service physical isolation zones based on different wavelength sequences.

7. The system according to claim 6, wherein the optical terminal multiplexing station apparatus comprises: the main circuit and the standby circuit use different routes according to optical cable resources.

8. The system of claim 6, wherein the network topology of the backbone transmission network system is topologically layered to obtain a partitioned network topology structure.

9. The system of claim 1, further comprising:

the system comprises a network management system server and at least one appointed OTN transmission device, wherein the type of the network management system server comprises: a remote disaster backup network management server and a daily operation and maintenance management server.

10. The system of claim 9, wherein the network management system server is configured to: as a primary network element management system and as a standby subnet management system.