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Method and apparatus, computer readable medium, for transferring content from source to destination

A content delivery network and destination technology, applied in the field of distribution of on-demand content in the multicast network, can solve the problems of consuming network bandwidth, not being able to pause and rewind multicast streams, and difficulties

Active Publication Date: 2019-10-01
BRITISH TELECOMM PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unicasting of all content is undesirable in most networks as it results in a large number of copies of the content sent on the network and consumes a large amount of network bandwidth
[0005] There are difficulties in delivering on-demand content to multiple end-hosts using multicast delivery techniques; for example, the inability to pause or re

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  • Method and apparatus, computer readable medium, for transferring content from source to destination
  • Method and apparatus, computer readable medium, for transferring content from source to destination
  • Method and apparatus, computer readable medium, for transferring content from source to destination

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Embodiment Construction

[0030] As noted above, aspects of the system described herein create multiple time-staggered multicast streams for the same piece of content. In some implementations, the source uses intelligent data analysis to decide which host should subscribe to which of those multicast stream(s). The source can then trigger the host's subscription to the selected stream. Hosts recombine multiple streams providing data from different starting points, and leave the multicast tree once they no longer receive unreplicated content from the multicast tree. This affects host-to-group membership and also enables better use of network resources by minimizing the number of unicast streams in the network for a piece of content. Embodiments of each of the above elements will now be described in more detail, but first an embodiment of the network in which the present system can be implemented will be described.

[0031] In the following description, the following terms may be used and take ordinary ...

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PUM

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Abstract

Method and apparatus, computer readable medium, for transferring content from a source to a destination. Methods and systems for distributing content in a network, particularly in a multicast network, are described. One method includes the steps of delivering content from a source to a destination in a content delivery network. A request for a piece of content is received, and a first multicast stream is identified or established, the first multicast stream including a first copy of the content. At least one second multicast stream is also identified or established, the second stream including a second copy of the content. The second copy of the content is time-shifted by a time M from the corresponding portion of the first copy of the content. The content is then delivered to the destination using both the first multicast stream and the second multicast stream.

Description

technical field [0001] The system relates to the distribution of content in a network, and in a particular embodiment, to the distribution of on-demand content in a multicast network. Background technique [0002] The transfer of large amounts of data to multiple users or end hosts can impose a large load on the network. Data can be broadcast on the network and picked up by receivers interested in acquiring the data. However, there may be entire sections of the network where there are no receivers wishing to obtain the data, so broadcasting data to these network sections wastes network bandwidth. An alternative is to use a unicast method to send data directly to only those users who have requested the data. However, this may result in a large amount of duplicate content being sent over the network, which may again cause congestion in the network and affect reliability and quality of service (QoS) for sending other data in the network. [0003] Multicast technology can be ...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04N21/472
CPCH04N21/47208H04N21/6405H04N21/6408H04L65/611H04L67/61H04L67/52H04L43/062
Inventor V·卡斯基延D·瑙克
Owner BRITISH TELECOMM PLC
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