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Content delivery system and content delivery method

  • US 9,763,133 B2
  • Filed: 07/04/2012
  • Issued: 09/12/2017
  • Est. Priority Date: 07/05/2011
  • Status: Active Grant
First Claim
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1. A content delivery system, comprising, on a mobile network:

  • a plurality of cache servers connected to at least one of a plurality of packet forwarding apparatuses configured to forward packets between a storage apparatus holding a content under management in store, and a user terminal;

    the plurality of cache servers caching at least part of the content under management in store stored in the storage apparatus; and

    a controller that controls the plurality of cache servers, the controller comprises;

    an on-screen resolution calculation unit that, based on a signal received from the user terminal requesting the content, calculates the on-screen resolution of the user terminal; and

    selects a cache server from the plurality of cache servers based on the on-screen resolution of the user terminal to transmit the content;

    wherein the selected cache server comprises;

    a bit rate calculation unit that, based on the signal received from the user terminal, calculates a bit rate with which the content is sent out based on Transmission Control Protocol (TCP) response signal received from the user terminal; and

    a transmission unit that reads out a file or a stream of the content requested from the user terminal, the file or the stream read out having a bit rate not higher than the calculated bit rate, stores the file or the stream in a packet of a predetermined protocol, and outputs the packet.

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