An integrated service access system based on EPON and dual-mode STB

Abstract

The invention relates to a synthesized access system which realizes multi-information, multi-system, multi-traffic fusion based on EPON passive optical network and DVB, IPTV double mode set top box. The system includes synthesized access of loaded traffics of various type such as data network, telecommunication network, television broadcast network. The system communicates with local apparatus OLT of EPON optical network through apparatus such as switch, protocol conversion, and completes uplink and downlink load by three wavelengths of lamda1, lamda3, and lamda2 in one optical fiber applying WDM technique. OLT connects optical network unit ONU at user side through passive optical network structure. Different positions where ONU is located corresponds to positions optical fiber reaches in FTTX. ONU connects to high speed Ethernet switch, various user audio, data equipments and double mode set top box through various interfaces, and final access of two video traffic of DVB and IPTV is completed by double mode set top box, thus a synthesized traffic access system is composed.

Description

1. Technical field [0001] The invention relates to an integrated service access system which utilizes an Ethernet passive optical network and a DVB and IPTV dual-mode set-top box to realize multi-network, multi-system and multi-service integration. For the FTTX (including fiber-to-the-home FTTH, fiber-to-the-road building FTTB, fiber-to-the-floor FTTP and other structures) optical network environment, a multi-information bearer access platform with resource sharing, system compatibility, and network integration has been created. 2. Background technology [0002] Among the current mainstream access technologies, the traditional cable television network is specially developed for the transmission of broadcast and television services. To realize the transmission of interactive services such as video on demand and the Two-way transformation of shaft cable hybrid network (HFC). At present, there are many technologies for HFC two-way transformation. The main method is to use two-...

AI Technical Summary

Problems solved by technology

At present, there are many technologies for HFC two-way transformation. The main method is to use two-way HFC+Cable Modem, that is, to use the low-end frequency in the original CATV system as backhaul to achieve asymmetric transmission. This method has users The available bandwidth is limited and the HFC return channel has the disadvantages of "funnel effect"

In terms of telecommunications, ADSL access technology is currently used, but due to the limitation of bandwidth and transmission distance, it is difficult to have long-term development.

ADSL technology is a broadband access technology based on copper wires. As the price of international copper cables continues to rise, the cost of copper-based ADSL lines will become higher and higher; as active equipment, electromagnetic interference is unavoidable , the maintenance cost will be higher and higher; in addition, the connection rate of ADSL can no longer meet the business needs of users such as high-definition video, and the transmission distance is also greatly limited

Images