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Physical layer recovery in a streaming data delivery system

A technology of transmission system and physical layer, applied in the field of asynchronous transmission mode streaming data transmission system, which can solve the problems of video or data stream transmission, service interruption, etc.

Inactive Publication Date: 2005-06-29
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the DSL modem loses physical layer synchronization, video or data streams can no longer be sent over the network from the video server to the user and cause service interruption

Method used

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  • Physical layer recovery in a streaming data delivery system
  • Physical layer recovery in a streaming data delivery system
  • Physical layer recovery in a streaming data delivery system

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Experimental program
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Embodiment Construction

[0012] The present invention provides a recovery mechanism to maintain data flow over a digital subscriber network when physical layer loss occurs. The recovery mechanism ensures that a sufficient amount of data is cached at the user's location to provide sufficient latency in the system to account for the failure time of the recovery physical layer. In modem technologies such as Digital Subscriber Line (DSL), resynchronization of the DSL modem is often required. During the resynchronization process, the stream of transmitted data is interrupted, causing a pause or other interruption at the user. The benefit is that when a DSL modem loses physical layer synchronization, the recovery mechanism is transparent to the user of the application streaming service (e.g., video and audio), e.g. when the DSL modem is in the process of resynchronizing, the interruption is transparent to the user. transparent. According to the present invention, if the modem loses synchronization, and at...

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Abstract

An Asynchronous Transfer Mode (ATM) digital document delivery system is provided. The subscriber side unit (2) is configured to allow subscribers to order and receive data streams. A buffer (34) is coupled to the user side unit (2) for storing the data stream before sending it to the user. The server (22) includes digital files stored thereon for transmission to users via the switching ATM network (100). The control device (11) is used to control the data rate of the data flow between the server (22) and the buffer (34), to ensure that during the loss of the physical layer between the server (22) and the user side unit (2) A steady stream of data is maintained from the user side unit (2) to the user.

Description

technical field [0001] The present invention relates generally to network communications, and more particularly to an Asynchronous Transfer Mode (ATM) streaming data transfer system and method for recovering data streams after loss of a physical layer protocol. Background technique [0002] Video-on-demand (VoD), audio-on-demand, and other streaming data delivery applications are emerging technologies for the home entertainment service industry. For example, VoD services allow users to request video services in real time from a large collection of video content stored on servers located at remote devices. For example, video transmission can be provided over a network system such as a telephone system or a cable network. However, there must be a sufficient amount of bandwidth to maintain a continuous flow of data from the storage system to the user device. The total amount of bandwidth between the video server and the user's device ultimately determines the maximum number o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F15/16G06F15/173H04L12/54H04L12/70H04L29/06H04M11/06H04N21/234H04N21/238H04N21/44H04N21/442H04N21/472H04N21/6373H04N21/6377H04N21/658
CPCH04N21/44209H04N21/23406H04N21/44004H04N21/658H04L65/4084H04L12/5601H04N21/6373H04L29/06027H04N21/6377H04N21/47202H04L2012/5647H04N21/23805H04L65/605H04L2012/5615H04L2012/5681H04M11/062H04L65/80H04L65/765H04L65/612H04L12/28G06F15/16H04L65/1101
Inventor 约翰·W·理查森
Owner THOMSON LICENSING SA