What Technical Solution Is Used For FTTR All-optical Network?
Fiber Cable Solution Technology Co.,Ltd.
FCST- Better FTTx, Better Life.
1.What is FTTR?
FTTR transmits optical fiber signals directly into the building and transmits the signals to the room through indoor network cables. The emergence of FTTR technology is to solve problems such as network bottlenecks, slow speed, and signal interference in traditional network architecture. FTTR technology?uses optical fiber as the network transmission medium. It has the characteristics of high-speed transmission, high bandwidth, low delay, and anti-interference, and can meet the needs of today's digital society for high-quality networks. With the help of FTTR technology, high-traffic applications such as multimedia content, high-definition videos, and online games can run more smoothly.
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At the same time, FTTR technology can also realize the development of more new service models such as telemedicine, online education, and telecommuting. Compared with traditional ADSL, VDSL and other broadband technologies, FTTR technology significantly improves network speed and data transmission quality, while avoiding transmission distortion and signal attenuation problems caused by distance, electromagnetic interference and other factors.
2.Why FTTR is needed?
2.1 Current status of WiFi coverage in homes of JB users
The vast majority of home broadband users' indoor WiFi is connected to a router through an optical modem, and is covered by the router's WiFi signal.
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Routers generally support two frequency bands, 2.4G and 5G. Although the 2.4G frequency band can support a maximum rate of 300Mbps, due to the relatively large interference in this frequency band, the actual use effect is much worse. Users' high-bandwidth applications must use the 5G?frequency band, but the ability of WiFi signals in the 5G frequency band to penetrate walls is weak, which brings great inconvenience to some large-scale users' high-bandwidth applications.
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2.2 Shortcomings of existing whole-house WiFi coverage solutions
Currently, whole-house WiFi coverage solutions mainly include three solutions: router cascade, power modem, and sub-master routing.The router cascading solution is to set up a master router at the optical modem, set up a slave router in each room, and connect the master and slave routers with Category 6 cables. Limited by the number of LAN ports on the master router, the number of slave routers does not exceed 4. If it exceeds 4, a switch needs to be added to the master router. Because this solution uses wired connections, it can ensure Gigabit connections between the master and slave routers; the disadvantage is that it requires laying Category 6 lines in the house, which is difficult to implement and may affect the appearance.
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The master-sub routing solution includes a master router and multiple sub-routers, and Mesh networking can be performed between each router through WiFi. Since it is difficult for the WiFi signal between routers to penetrate the wall, the bandwidth capacity of this solution is greatly affected by the environment. There is a sub-routing product that uses WiFi and power lines for transmission between the sub- and main routers, which improves WiFi's ability to penetrate walls. However, the overall bandwidth capacity is still far behind the router cascade solution.
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2.3 Advantages of FTTR
FTTR uses one master power modem and multiple slave power modems for indoor WiFi coverage, and butterfly optical cables or hidden optical cables are used to connect the master and slave optical cats.
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Compared with the above solutions, FTTR has the following advantages: (1) Butterfly optical cables or hidden optical cables are easier to lay than Category 6 lines, and the hidden optical cables basically do not affect the indoor appearance when laying out; (2) Any optical power modem for Gigabit users is close to The maximum network speed can reach 1000Mbps; (3) The network speed is stable, and the terminal switches between optical modes smoothly; (4) The life of the optical fiber exceeds 20 years, and the bandwidth is almost unlimited.
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Due to the above advantages of FTTR, the whole-house WiFi coverage solution provided by operators is currently being adjusted from the previous sub-mother routing solution to the FTTR solution. FTTR is a new coverage mode for home networks in the Gigabit era, and it is also another technological evolution and upgrade of home networks. In the past, optical fiber was used in living rooms, but now it is covered in every room.
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3.FTTR technical solution
According to the different optical fiber connection methods between the master and slave optical modems, FTTR's technical solutions are divided into P2P solutions and P2MP solutions.
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1)P2P solution
The P2P solution is based on Ethernet technology, and the master optical modem and each slave optical modem are connected through an optical fiber. The master optical modem is generally equipped with 4 single-core bidirectional optical modules, and can connect up to 4 slave optical modems. Compared with the router cascading solution, the biggest change of this solution is to change the cascaded RJ45 interface into an optical interface, so that optical fiber transmission can be used between the master and slave routers. This technology is simple to implement and low in cost, but its expansion capabilities are limited.
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2)P2MP solution
The P2MP solution is based on GPON technology. The master optical modem is equivalent to a mini OLT, and the configured optical module is a Class B+ optical module common to GPON; the slave optical modem is the WiFi 6 Gigabit optical modem currently used by GPON. A 1:5 optical splitter is used in the ODN between the master and slave optical modems. The splitter can be cascaded in multiple stages to support the access of up to 16 slave optical modems.
The 1:5 optical?splitter adopts unequal beam ratio. The insertion loss between the input port and the cascade port is about 2.0dB, and the insertion loss between the input port and the output port is about 15.4dB. Each splitter?contains 1 input port, 1 cascade port and 4 output ports, and each output port can connect to 1 slave optical modem.
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3)Comparison between P2P and P2MP
The P2P solution is technically simple and cheap. Although the number of supported secondary optical modems is small, judging from the currently installed FTTR users, the vast majority of users have less than 4 secondary optical modems. Therefore, the P2P solution can basically meet user needs.
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P2MP uses GPON technology, which saves the deployment of optical fibers. It supports a large number of slave optical modems, and it is also very convenient to add or remove slave optical modems. Although the main optical modem is relatively expensive, due to certain technical barriers and convenient operation, maintenance and management, it has become the main solution promoted by major equipment manufacturers and operators.
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Among the two technical solutions of FTTR, P2MP will eventually become the mainstream solution. The powerful access capability of this solution can even be used for internal networking of small and micro enterprises, as well as access for larger user groups such as hotels, restaurants, shopping malls and supermarkets. In this solution, the multi-stage cascade method of 1:5 unequal ratio optical splitters can also be used in low-density access scenarios such as rural areas. We look forward to a wider range of applications of FTTR technology based on P2MP.
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FCST - Better FTTx, Better Life.
We have been designing, manufacturing and supplying passive components for fiber optical networks since 2003. Everything we do in FCST?is designed to provide efficient, simple and innovative solutions to solve complicated tasks.
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As a FTTx solution supplier, we can also do ODM according to project. We will continue to innovate and contribute more to the construction of the global optical fiber network.