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Network cache architecture

  • US 9,479,560 B2
  • Filed: 01/26/2010
  • Issued: 10/25/2016
  • Est. Priority Date: 06/17/2009
  • Status: Active Grant
First Claim
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1. A cache for use in a packet data network, comprising:

  • a receiver for receiving a packet from an upstream node, the packet including transport and application headers and a payload;

    a storage medium for storing cached data;

    a processor operatively connected to the receiver and storage medium, the processor configured to;

    determine whether the packet comprises a stripped-down packet in which the payload thereof contains pointer information identifying a payload data segment;

    if so, determine whether the payload data segment is stored in the storage medium; and

    if so, use the pointer information to locate and retrieve the payload data segment from the storage medium, insert the retrieved payload data segment into the payload of the packet, and remove a fall-back parameter from the packet header and replace it with a correct value retrieved from the pointer information, the fall-back parameter designed to cause the client node to return an error message if the stripped-down packet reaches the client node; and

    a transmitter operatively connected to the processor for forwarding the packet towards a client.

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