Regional Education Private Network Fiber High-Bandwidth Transmission System
China currently places great emphasis on education informatization construction, and the "Class-to-Class" and "School-to-School" projects have been under development for some time. The remote education function of "School-to-School" can narrow the educational gap between urban and rural areas. It is an effective means of using information technology to improve the quality of primary and secondary education across the province, especially in remote areas, facilitating the sharing of educational resources, information exchange, teacher training, and teaching enhancement.
The School-to-School metropolitan area network and education backbone network involve wide area network construction. For the construction of the education metropolitan area network and education backbone network, wide area interconnection can use gateway devices such as routers and Layer 3 switches for star topology networking, some even utilize RPR technology for ring topology networking, or use transmission equipment or WDM equipment for ring topology networking. These devices are expensive, difficult to maintain, have limited functionality, and require high-level communication expertise, hindering the performance of the education network.
This article proposes the establishment of a comprehensive regional education private network communication system that can simultaneously address the school's external network (Internet), internal network (including exam resource network, synchronous teaching network, video conference network, surveillance network, etc.), telephone exchange network, one-card IoT network, and more.
Due to the high volume of video transmission content in the education private network, the required transmission bandwidth is relatively large. Therefore, it is advisable to primarily lease bare fiber from operators such as China Unicom, China Mobile, China Telecom, and China Broadcasting Network. Where conditions are not available, lease STM-1 channels or use microwave STM-1 channels. These channels can be divided into multiple physically isolated Ethernet channels. For example, content transmitted within the exam network requires a high level of confidentiality. Other networks, such as the synchronous teaching network, require high transmission quality. Running one-card information on an independent private network better ensures information security. Therefore, several independent physically isolated networks are needed to guarantee the information security of the education private network, especially in situations without dedicated communication technical personnel.
For Internet information provided by schools to the outside, all schools can centrally use the external network interface at the Education Bureau. This not only allows unified broadband operator access as a large customer but also enables periodic adjustment of individual access bandwidths based on operator bandwidth pricing. Simultaneous access to multiple operators can also mitigate the risk of a sudden traffic drop from one operator. Additionally, a unified external network exit allows for centralized funding to purchase more advanced routers and firewalls, enhancing bandwidth throughput performance and system security. Centralizing the external access equipment room at the Education Bureau also facilitates connection to the higher-level education private network, enhancing the rational utilization of educational resources across the province. It also allows for bulk purchasing of advanced educational resources as a large customer for shared use by all schools.
The education private network can not only transmit various network information but also centrally aggregate telephone information from all schools to the Education Bureau, serving as a large customer for unified operator access, typically connecting to two operators for mutual backup. This gives schools more control over telephone resource installation, making it more convenient, while also integrating other communication resources such as wireless trunking for routine management supervision and remote exam supervision and command.
Currently, Raytrans can provide comprehensive service transmission over bare fiber with 5GE and 2.5G bandwidth, and information transmission with 622M and 155M bandwidth over SDH channels (wired or microwave). It can simultaneously provide multiple physically isolated Ethernet channels, E1 channels, telephone channels, and low-latency high-definition image signals.
This not only facilitates inter-school information transmission but also allows convenient access to various information at application sites within the school via fiber. A school-level communication dispatch center can also be established on campus.
The inter-school networking structure is as follows:
The intra-school networking structure is as follows:
