System and method for Ether-passive optical network bearing digital television program

Abstract

The invention relates to a system and a method for bearing digital television programs in an Ethernet passive optical network and the system is composed of OLT, a video server, an EPG server, ODN, ONU and an IP set-top box. Mutual communication is realized by the connection between OLT and the video server and between the OLT and the EPG server through the Ethernet; the OLT is provided with optical fiber interfaces which are connected with the ODN and the OLT is connected with the ONU via the ODN by optical fiber, thereby completing the downlink delivery and uplink transmission of the Ethernet frames of each ONU and completing the reception of the uplink business of each ONU by utilizing TDM; the ONU is connected with the IP set-top box by twisted pair lines and video access terminals consisting of the IP set-top box and a TV terminal are connected by AV lines. All users under the management of the OLT of the invention can complete the reception of programs by multicast frames. Programs not accepting request are cached in the video server of the OLT, which occupies no downlink bandwidth of EPON, thereby improving the bearing efficiency of the EPON to DVB business and the utilization of the downlink bandwidth of the EPON greatly.

Description

technical field [0001] The invention relates to the technical field of optical network information transmission, in particular to a system and method for carrying digital television programs (DVB) over an Ethernet passive optical network (EPON). Background technique [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). This method has disadvantages such as limited bandwidth available to users and the "funnel effect" of the HFC return channel. However, ADSL access technology is currently used in telecommunications, and it is difficult to have long-term development due to the limitation of bandwidth and transmission distance. ADSL technology is a broadband access technology based on copper wires. As the pric...

AI Technical Summary

Problems solved by technology

This method has disadvantages such as limited bandwidth available to users and the "funnel effect" of the HFC return channel.

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; the current connection rate of ADSL uplink 1MBit / s and downlink 8MBit / s can no longer meet the needs of users such as high-definition video, and its transmission distance is also greatly limited

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