SCM/Ethernet composite PON network and method for bearing VoD business

A SCM-PON, business technology, applied in the field of optical network communication technology and multimedia, to achieve the effect of increasing the maximum concurrent number of on-demand, good interactivity, and rich program sources

Inactive Publication Date: 2009-05-20
LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

With the rapid development of IP technology, the IPTV business that has emerged in recent years has brought a huge threat to digital T

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  • SCM/Ethernet composite PON network and method for bearing VoD business
  • SCM/Ethernet composite PON network and method for bearing VoD business
  • SCM/Ethernet composite PON network and method for bearing VoD business

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Embodiment Construction

[0039] The core of the present invention is to provide an Ethernet / subcarrier composite passive optical network structure, and use the composite PON structure to provide users with a method for VOD services. Specifically, in the downlink direction, the IPTV data packet based on the Ethernet protocol and the TS stream based on the DVB standard are carried on different downlink wavelengths of the EPON and the SCM-PON. In the uplink direction, the user interface is connected to the ONU unit through the STB system, and uses the time slot allocated by the OLT unit to send uplink signals. In order to improve the downlink bandwidth of the system, WDM technology can also be used to increase wavelength resources for EPON and SCM-PON systems.

[0040] Based on the above-mentioned system solution, the present invention firstly provides a system structure of an Ethernet / subcarrier composite passive optical network, such as figure 1 shown, including:

[0041] On-demand server: used to re...

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Abstract

The invention relates to a composite passive optical network structure of an Ethernet passive optical network(EPON)/ subcarrier passive optical network (SCM-PON) and a processing method for utilizing the composite PON structure to bear VoD service. The EPON and the SCM-PON are combined to form the composite PON structure through wavelength division multiplexing technology. A user interface of an optical network unit (ONU) in a system is connected with a set-top box system to complete the receiving of a downlink on-demand signal and the sending of an uplink on-demand command; in an optical link unit (OLT), two video-on-demand services based on DVB(digital television) and IPTV(network television) are born on the different PON structures of different wavelength and keep transparence of a protocol. The method utilizes one part of frequency band resource of SCM-PON subcarrier and an EPON multicast mechanism to support the alternate broadcast of programmes and realizes Near Video On Demand (NVOD) of certain programmes with high on-demand rate so as to save the on-demand bandwidth. Other bandwidth resource of the SCM-PON and EPON can support real-time video-on-demand (VoD) service based on the DVB and IPTV. The method comprehensively utilizes the advantages of two on-demand modes of the NVOD and VoD and two on-demand services of the DVB and IPTV, improves the largest concurrent number supported by a network system and reduces the average waiting time of a user.

Description

1. Technical field [0001] The invention relates to the fields of optical network communication technology and multimedia technology, in particular to a method for carrying video-on-demand services in an Ethernet / subcarrier passive optical network (Ethernet / SCM PON). 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). The low-end frequency in the original CATV system is used as backhaul to realize asymmetric transmission. This method has disadvantages such as limited bandwidth available to users and the "funnel effect" of the HFC backhaul channel. However, ADSL access technology is currently used in telecommunications, and it is difficult to have long-term development due to the li...

Claims

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Application Information

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IPC IPC(8): H04L12/18H04J14/02H04N7/173H04N7/24
Inventor 季伟崔卫李晓峰刘永辉刘剑
Owner LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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