Selection of all-optical technology in the park - Part 2

Introduction to this issue ： In last issue, we introduced common campus scenes —— Scene characteristics of the classroom 、 Business needs , There are many kinds of terminals based on the classroom 、 Business complex 、 Large uplink and downlink bandwidth , The characteristic of high delay requirements recommends the most suitable Ethernet all-optical scheme . In this issue, we will show you another common scene on campus —— The scene business characteristics of the dormitory , And the selection of the best all-optical technology scheme in this scene .

As the mobile phone 、 laptop 、 Tablet and other wireless terminals are becoming more and more popular among students , Dormitory is the main leisure place for students after class , Its wireless network experience is very important for students' after-school study and entertainment life . With dormitory WiFi 6、4K video 、VR Traffic business is gradually popularized , The daily online traffic of students is increasing , The traditional Ethernet three-layer network has been difficult to meet the current network bandwidth requirements of student dormitories , The all-optical network deployment in the dormitory is undoubtedly the best choice at present .

One 、 Dormitory scene features

Dormitory scene business generally has the following characteristics ：
1、 The terminal type is mainly personal computer 、 mobile phone 、 Flat , Wireless access is more than wired access （ Pictured 1）, Wireless IOT terminals deployed by the school, such as smart door locks 、 Smart water and electricity meters will also share floor wireless signals and uplink bandwidth , But the flow is small , The wired IOT terminal does not occupy the wired interface of the dormitory

chart 1 Dormitory terminal distribution
2、 Dormitory staff are concentrated , High performance 、 High concurrency , Average bandwidth demand of each dormitory 200Mbps above
3、 High utilization of wireless network , The utilization rate of wired network is lower than 30%
4、 The space of weak current well is limited , Limited power supply , Some buildings are too long , Bridge space is tight , Network coverage is difficult
5、 From the flow model ：
 The dormitory is basically the vertical flow from the terminal to the Internet or education network , Meet the needs of students to access the Internet or teaching resources
 A few IOT terminals pass AP Realize the interactive control in the wireless LAN of the dormitory
 The horizontal flow demand between dormitories is small

Two 、 Scheme selection

After analyzing the business characteristics and traffic model in the dormitory scenario , Based on this, we will match the most appropriate all-optical technology scheme for the dormitory , Just like the classroom , You can also choose Ethernet all-optical or PON Network plan .

chart 2 Dormitory Ethernet all-optical solution architecture

Compared with the deployment of traditional Ethernet three-tier network architecture , The Ethernet all-optical scheme adopts the building all-optical switch as a unified convergence, eliminating the weak current room on the floor , Optical fiber into the room, Ethernet all-optical in each dormitory AP Directly connected building convergence switch , Gigabit network access can greatly ensure the safety of each dormitory 、 downstream bandwidth , Greatly improve students' watching videos 、 Download courseware 、 Online experience such as games , A few wired devices （ Student personal computers, etc ） You can also use the panel AP Ethernet port access .AP Adopt local power supply mode in case of failure , Students can plug and unplug wires to restart , Simplify operation and maintenance management , And the responsibility for the separation of strong and weak electricity is clear , The electricity bill will also be borne by students .

PON Network scheme deployment

According to the selection of the last hop node equipment of the optical fiber link ,PON The deployment of network solutions can be divided into two ways ： Optical fiber enters the room 、 Optical fiber enters the corridor .

1、 Optical fiber enters the room ：

chart 3 dormitory PON Network optical fiber indoor scheme architecture

Each dormitory is equipped with one PON AP Directly converge to the machine room OLT, adopt 1 branch 32 Spectral ratio of , It can guarantee every dormitory 300Mbps Bandwidth requirements , A few wired devices can also pass AP Ethernet port access , Compared with traditional Ethernet and Ethernet all-optical network ,PON The deployment of the network is simpler . The convergence adopts passive spectroscopic equipment , Reduce the temperature of weak current room on the floor 、 Humidity and other complex environments have an impact on the network , Improve network stability , Make the online experience of students' dormitories more smooth .PON AP Plug and play , No complicated configuration , It can reduce the operation and maintenance management cost , And AP Adopting local power supply also has the above advantages . Subsequent business upgrades will bring higher bandwidth requirements , Because the optical fiber is laid in one step in the early stage , It can be realized by adjusting the spectral ratio 300M~10G Bandwidth upgrade , There is no need to replace the front-end equipment .

2、 Optical fiber enters the corridor ：

chart 4 dormitory PON Network optical fiber into corridor scheme architecture
Adopt corridor deployment ONU Converge to the central machine room OLT, And it can be used for AP Conduct POE Power supply , send AP Power supply is more safe and reliable , Reduce construction complexity , Make the network deployment process easier . Each dormitory can be achieved through appropriate spectral ratio 300Mbps Bandwidth requirements , except PON The passive optical splitter inherent in the network simplifies management 、 Advantages of improving stability ,ONU Can be wall hung in the corridor multimedia box , So there is no need for weak current room , Make management and maintenance more convenient .

Sum up , Etheric all light and PON Network solutions have their own advantages and characteristics , But based on its weakness, the well space is limited , Personnel concentration , High data concurrency traffic , There are fewer types of terminals , The business is relatively single , The flow model is mainly characterized by north-south flow , We recommend it in the dormitory scene PON Network plan , It can not only perfectly meet the current demand for dormitory bandwidth , And it can reduce the construction complexity and simplify the management , Make operation and maintenance more efficient and convenient .