Point-to-multi-point two-way optical fiber coaxial mixed full-service broadband access system

Abstract

The invention discloses a point-to-multi-point two-way optical fiber coaxial mixed full-service broadband access system based on an IEEE802.3ah protocol and the technology thereof (i.e. an EPON + ECAN broadband access network system). The system seamlessly transplants an IEEE802.3ah EPON protocol and the technology thereof into a passive coaxial cable user distribution network from a passive optical network (EPON), so that 802.3ah passes through PON from the front end and is seamlessly transplanted to PCN (passive cable network) so as to realize the broadband access of P2MP. The system comprises the passive optical network (EPON) on the front end and a coaxial network system close to a user terminal, so that one optical fiber arrives at a building and one coaxial cable enters a household, so as to provide two-way data and broadcasting television services. The system comprises a coaxial line terminal CLT, a coaxial network unit CNU, an SNMP remote network management system for managing the communication between the CNU and the CLT and a method for realizing 20 to 100Mb / s broadband data access between the CLT and the CNU within the frequency band of 5 to 65MHz, and compositing and decomposing data signals and broadcasting television signals.

Description

Technical field: [0001] The present invention relates to the transmission and control of cable television signals and broadband data signals in the field of broadband access network technology, and in particular to a point-to-multipoint bidirectional fiber-coaxial hybrid full-service broadband based on the IEEE802.3ah protocol and its technology Access system (EPON (Ethernet Passive Optical Network) + ECAN (Ethernet cable access network)). Background technique: [0002] With the rapid development and popularization of digital technology and network technology, the world's radio, film and television is currently in a critical period of full conversion from analog technology to digital technology. Governments of various countries are vigorously promoting the digitalization of radio, film and television, and developing the digital content industry of radio, film and television. Domestically, relevant industries have completed the conversion from analog technology to digital tec...

AI Technical Summary

Problems solved by technology

The active modulation technology DOC network has strong adaptability, especially suitable for point-to-multipoint network structure, but they all adopt the MAC protocol of CSMA, and the bandwidth of each user equipment CPE is free to compete like a HUB, and the bandwidth is not guaranteed. Adapt to the large-scale operation of the network

As the number of access users increases, the CPE bandwidth of each user will drop sharply. The bandwidth varies greatly, and there are occasional interruptions. The system is unstable and cannot support more users. It is difficult to realize carrier-level user management and operation of the network. And maintenance

And regardless of active modulation DOC or baseband non-modulation EOC, bandwidth limits their ability to adapt to new services

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