In the mobile Internet age, wireless networks for access by mobile terminals significantly change the way of learning. Acquiring, handling, and transferring knowledge anytime and anywhere have become a new learning habit. In the campus of Sun Yat-sen University, an "operational and high-quality" wireless network is demonstrating its values. It provides high-quality wireless access services for various mobile terminals of teachers and students and helps integrate more innovative teaching methods into the smart campus learning and life.

The Century-old Prestigious University Ushers the "Baptism" of Internet + Education
Sun Yat-sen University was founded by Dr. Sun Yat-sen with a history of more than 100 years. It is a key university of the "Project 985" and "Project 211". Sun Yat-sen University builds a large-scale campus network, which covers four campuses and has 74,213 network information points. The scale of the campus network ranks top among campus networks of colleges and universities in China.

The continuous integration of teaching and information technologies brings diversified development of the education forms. Sun Yat-sen University also raises a plan for the innovative teaching platform, which covers the Massive Open Online Courses (MOOCs) (new media literacy, introduction to the geographic information system, and medical statistics), E-learning (mobile learning platform), and creates the innovative "anytime & anywhere" learning style. In response to the new teaching forms, Sun Yat-sen University desires to build an "operational and high-quality" wireless network for the dormitory area in the east of the south campus, to provide access services for various mobile terminals of teachers and students, thereby infusing multiple innovative teaching methods into smart campus learning and life.

Just as the foreword text "Network anytime & anywhere" provided on the e-learning platform of Sun Yat-sen University, how to build a high-quality network that meets this requirement?

Ruijie "i-Share+" Appropriately Caters to Wireless Networks for the Dormitory Areas in Colleges and Universities
Having served the information-based education for years, Ruijie Networks provides the new-generation "i-Share+" wireless network solution for Sun Yat-sen University. Ruijie "i-Share+" solution adopts the hierarchically distributed architecture, which surpasses the conventional AP deployment by ten times in performance and isolates the master AP from radio modules (micro APs), to greatly improve the system reliability and signal strength. It fully meets the scenario of small compartments, high density, and many barriers in dormitories of colleges and universities.

The dormitory area in the east of the south campus of Sun Yat-sen University has 4,650 rooms in 32 buildings. Ruijie deploys the i-Share+ micro APs (RG-MAP552) and the master APs (RG-AM5528) based on the number of rooms in each building. The master APs are connected to the switch of each building and the switches of all buildings are connected to the convergence gateway through 1000M single-mode fibers. The convergence gateway integrates the high-performance wireless controller card (RG-M18000-WS-ED) to manage all APs in a unified manner.

Creating the “Powerful, Easy-to-Manage, and Green" Dormitory Network
The "i-Share+" solution not only eliminates the poor wireless signal quality caused by many barriers and corners in dormitories of Sun Yat-sen University, but also conforms to the "operational" principle in the application and management. It comprehensively improves the Internet access experience for teachers and students.

The "i-Share+" solution easily copes with the challenge of heavy traffic generated when students access the online learning platform and watch high-definition videos anytime and anywhere. The i-Share+ master AP (RG-AM5528) supports a maximum of 24 dual-radio, dual-band, dual-stream 802.11ac RF ports and provides the maximum exclusive access rate of 300 Mbps (2.4 GHz band) and 867 Mbps (5.8 GHz band) for each dormitory. The field test shows that the throughput of a single dormitory reaches 600 Mbps, which meets the multi-user, multi-STA, and heavy load requirements of ten thousands of teachers and students for the "mobile learning" service.

In addition, the master AP and micro AP radio modules of the "i-Share"" solution belong to the same AP. Micro APs do not need to be managed separately, and they do not need software upgrade or configuration delivery. In addition, they do not occupy license resources of the wireless controller or IP address resources, and the Power over Ethernet (PoE) switch is not required either. Only 255 APs need to be deployed to provide wireless coverage for 4650 rooms in the dormitory area in the east of the south campus, which are 94% less than the devices required in conventional solutions. Micro APs receive the configuration delivered by the i-Share+ master APs after power-on. If micro APs in dormitories need to be replaced, supplemented, or moved, they support plug-and-play and no configuration is required. The innovative scenario-based solution makes the wireless network management extremely simple.

The dormitory network of Sun Yat-sen University features a large scale and considerable devices. In addition to Operation & Maintenance (O&M), power consumption is a concern in view of continuous running of so many hardware devices. In comparison with conventional solutions, the "i-Share+" solution used in this project saves the energy by 50% for the master APs and 33% for micro APs used in rooms, achieving comprehensive energy saving by more than 40%. After calculation, about 13,680 kilowatt-hours can be saved every month, which reduces the emission of carbon dioxide generated due to combustion of about 4.6 ton coal. The "i-Share+" solution helps Sun Yat-sen University better fulfill its social responsibilities.

 "One-click Optimization" of Smart Wireless Campus Network
Device running greatly differs from network operation. Zhao Qiong, a teacher in the network and information technology center of Sun Yat-sen University says "The greatest difference between a wireless network and a wired network is that the wired network can be used immediately after deployment and reach its optimal state, while the wireless network can get into a good state only after network optimization. Wireless network optimization, including wireless network troubleshooting, network optimization parameter verification, and related operation condition, is complex and has always been a difficult problem to us."

To handle visualized operation of the dormitory network, Sun Yat-sen University introduces Ruijie's exclusive WLAN Intelligent Service (WIS) and deploys three modules: intelligent network optimization tool, fault identification system, and visualized experience platform. For administrators, the WIS can optimize the infrastructure network in one-click mode, resolve problems concerning power adjustment, channel selection, roaming stickiness, remote association, access to non-optimal band, and frequent roaming, provide in-depth guarantee for online learning and video conferences, and use the visualized experience platform to show whether video drops or stalling occurs at the user end.

Ruijie "i-Share+" solution and WIS system work together, to build the most intelligent wireless network with costs far lower than those of conventional solutions. The automatic and intelligent wireless network optimization function, intelligent fault diagnosis, and self-healing function are fully recognized by Sun Yat-sen University. Leaders of the network center express that the wireless network for the student dormitory area in the east of the south campus brings superb wireless Internet access experience to teachers and students, provides great support for innovative teaching, and serves as the important foundation for future smart campus development of Sun Yat-sen University.