At present, IPTV, the three major telecommunications operators, is constantly encroaching on the cable TV market of traditional radio and television operators. Radio and television operators are facing a large number of user losses, and the transformation of radio and television development is imminent. It can be said that whoever controls the living room catches users. The main business of radio and television operators includes both radio and television services and two-way data services (Internet access/VOD/IPTV/e-government/interactive games) as well as broadband services. Therefore, the construction of FTTH for radio and television inevitably involves the construction of FTTH for radio and television services and the construction of FTTH for two-way data services. Combining the existing resources of radio and television, the implementation of FTTH mainly adopts the current mainstream solution in the industry: single fiber three wave+broadband service access solution. Today, the editor will mainly explain to you.
In the single fiber three wave+broadband service access scheme, the ONU optical cat data section uses 1310nm/1490nm optical signals, and the ONU CATV section uses 1550nm optical signals. In the radio and television front-end room, the WDM wavelength division multiplexing equipment is coupled to a fiber optic cable, and then it passes through the transmission and optical splitting of various levels of ODN equipment before finally reaching the user’s home. In the ONU optical cat unit of the user’s home, the single fiber three wave ONU CATV developed by our company is used, That is, data+CATV optical and mechanical two in one GPON ONU, which can directly output broadcast television signals and broadband data signals. At the same time, radio and television operators can also develop broadband users based on this scheme, achieve multi-service income generation, and reduce network construction costs.
The advantages of the single fiber three wave access scheme are as follows:
1. End-to-end management: Due to the end-to-end network architecture of one fiber three wave, it is very convenient to manage ONU optical cats. Network managers can implement operations such as remote service distribution, fault maintenance, and opening/closing CATV services through front-end OLT devices.
2. Low ODN cost: Because broadcast TV signals and broadband data signals are transmitted on the same physical optical fiber, this scheme greatly reduces the construction cost of ODN resources from the front-end to the user’s home.
System topology diagram