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Multicast information delivery system and multicast information delivery method

A multi-point transmission and information transmission technology, applied in transmission systems, digital transmission systems, two-way working systems, etc., can solve the problems of information reception attenuation and viewer satisfaction, and achieve the effect of preventing content quality degradation and signal delay.

Inactive Publication Date: 2005-08-31
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, especially when the server 521 transmits data with a large amount of data on multiple channels, such as TV programs, a problem arises: the reception of packets transmitted from other data transmission sources cannot be completed.
Further, it is possible that the reception of the information sent from the server 521 may even be attenuated to a level unsatisfactory to the viewer

Method used

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  • Multicast information delivery system and multicast information delivery method
  • Multicast information delivery system and multicast information delivery method
  • Multicast information delivery system and multicast information delivery method

Examples

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Embodiment Construction

[0036] Now, preferred embodiments of the present invention will be described in detail.

[0037]

[0038] image 3 An overview of the multicast information delivery system 100 for viewing and listening to television images and sounds according to this embodiment is shown. The multicast information transmission system 100 uses ADSL (Asymmetric Digital Subscriber Line, Asymmetric Digital Subscriber Line). In this multicast information delivery system 100, subscriber splitters 101-1 to 101-M are respectively arranged at the homes of subscribers (or contractors) and subscriber line accommodating devices 102 are connected via DSL subscriber lines 103-1 to 103-M together. Telephones 104-1 to 104-M and ADSL modems 105-1 to 105-M are connected to subscriber splitters 101-1 to 101-M, respectively. Personal computers 106-1 to 106-M performing various data processing such as homepage browsing are connected to ADSL modems 105-1 to 105-M, respectively. In addition, Internet TVs 108-1 ...

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PUM

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Abstract

Multicast communication frames for a plurality of channels corresponding to television programs and so on received from an uplink line 130 are subjected to limitation with respect to a total reception amount or limitation according to priorities and sent out from a first priority control section 192 , then forwarded onto a backplane bus 128 as ATM cells from an ATM SAR 134 . DSL subscriber line termination units 127 refer to their own local multicast distribution tables 211 obtained on the basis of a global multicast distribution table 205 to thereby duplicate as many copies of the ATM cells of the channels concerned as required and send them to corresponding DSL lines.

Description

technical field [0001] The present invention relates to a multicast information delivery system and a multicast information delivery method for selectively delivering composite channel communication information to contractors. In particular, the present invention relates to a multicast information delivery system and a multicast information delivery method in which each contractor selects a desired channel from communication information of a plurality of channels of movies, television broadcasts, etc., and accept the information transmitted therein. Background technique [0002] Where each individual advocates personalization of content such as television programs, the diversity of television programs available to these individuals through broadcasting has been strongly demanded. Concomitantly, users who are dissatisfied with existing TV stations and select desired programs from more channels using a system such as CATV (Cable TV) that provides multi-channel programs have b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L45/16H04L12/18H04L12/28H04M11/06H04N7/08H04N7/10H04N7/16H04N7/173
CPCH04L12/2856H04L47/2441H04L12/2861H04L47/10H04L47/2416H04L12/185H04L12/1881H04L47/15H04L47/43H04N7/08H04N7/10
Inventor 关根实田中雅士
Owner NEC CORP
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