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Broadband telecommunications system and method used therein to reduce the latency of channel switching by a multimedia receiver

A telecommunication system and channel technology, applied in transmission systems, digital transmission systems, two-way working systems, etc., can solve the problems of delay time, cannot be processed at the same time, unpredictable delay time, etc.

Inactive Publication Date: 2005-11-30
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This doesn't happen instantly, but introduces a delay depending on network load and other unpredictable conditions
[0009] 3. Even when there is no delay time due to the protocol as described above, unpredictable delay time may occur when changing channels
[0014] However, this also brings some limitations:
ASAM cannot handle all these requests at the same time

Method used

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  • Broadband telecommunications system and method used therein to reduce the latency of channel switching by a multimedia receiver
  • Broadband telecommunications system and method used therein to reduce the latency of channel switching by a multimedia receiver

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Embodiment Construction

[0036] The broadband telecommunication system shown in Fig. 1 includes a plurality of content servers BS1 to BS4 connected to a plurality of users TV1 to TV4 through broadband channels. The system also comprises an access unit, preferably an Asymmetric Digital Subscriber Line (ADSL) subscriber access multiplexer ASAM, and interfaces with the content server BS1-4 and the subscriber TV1-4. Content server BS1 / 4 provides content from sources such as the BBC TM or CNN TM The channel of the multimedia data of the group, for example, the user of TV3 can use the remote control RC to choose to receive multimedia data from one of these content servers.

[0037] When the user (or its user), such as TV3, selects a channel from the content server (such as BS2), the multimedia data is sent from the content server BS2 to the ADSL user access multiplexer ASAM via the channel BSC2a, and then via the channel TVC3 Send to user TV3. Most of the multimedia data from the content servers BS1-4 ar...

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Abstract

A broadband telecommunication system with several content servers (BS1-4) providing channels of multimedia data to subscribers (TV1-4) coupled thereto via a access unit, preferably an Asymmetric Digital Subscriber Line (ADSL) Subscriber Access Multiplexer (ASAM). The content servers are also coupled to the ADSL Subscriber Access Multiplexer (ASAM) via a Zapping Service Box (ZSB) that merges the channels into a composed channel transmitted to the ASAM via a single zapping channel (ZC). When a subscriber (TV3) requests a selected channel, and when this channel is not yet directly available at the ASAM, the latter immediately provides to this subscriber the composed channel until the ASAM receives the requested channel directly from the content server providing it. <IMAGE>

Description

technical field [0001] The invention relates to a method used in a broadband telecommunication system, wherein a plurality of content servers are connected to a plurality of users via an access unit for providing said users with said Describe the selected channel selected by the user. Background technique [0002] Such methods for use in broadband telecommunication systems are generally known in the art. It involves multicast transmissions that experience long and unpredictable delay times when users (or rather, their users) switch from one multicast group (i.e., one channel) to another The problem. This lag time or delay is especially annoying for services like broadcast video. [0003] The longer the delay time, the longer the user or user has to receive unwanted channels or multicast traffic before the requested channel can be forwarded. This degrades the user experience as television viewers tend to zap, ie switch from one channel to another. By switching channels, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/28H04L12/56H04L29/06H04N7/24
CPCH04N21/4384H04N21/6405H04N21/472H04N21/23424H04N21/6125H04N21/2365H04N21/2343H04N21/44016
Inventor M·佩尔特
Owner ALCATEL LUCENT SAS