ONLINE PROGRESSIVE CONTENT PLACEMENT IN A CONTENT CENTRIC NETWORK

摘要

A method for content placement along the delivery path of a network of nodes in a content centric network includes receiving first and second interest packets from a downstream node, checking a content cache of a first node for the first and second data packets and, in response to the first and second data packets being absent from the content cache, checking a pending interest table of the first node for the first and second interest packets. The method also includes, in response to the first and second interest packets being absent from the pending interest table of the first node and a cache flag of the first interest packet received from the downstream node being off, performing various operations to cause the first data packet to be cached in the content cache of the first node.

主权项

1. A method, comprising:
receiving first and second interest packets from a downstream node of a plurality of nodes of a network, wherein the first and second interest packets respectively identify first and second data packets of a plurality of data packets that collectively form a content; checking a content cache of a first node of the plurality of nodes for the first and second data packets; in response to the first and second data packets being absent from the content cache, checking a pending interest table of the first node for the first and second interest packets; and in response to the first and second interest packets being absent from the pending interest table of the first node and a cache flag of the first interest packet received from the downstream node being off:
recording the first and second interest packets in the pending interest table;setting a cache flag of the first interest packet in the pending interest table;forwarding the first and second interest packets to an upstream node of the plurality of nodes with a cache flag in the first interest packet set to indicate that the first data packet identified by the first interest packet will be cached in the content cache of the first node;receiving the first and second data packets from the upstream node; andcaching the first data packet in the content cache of the first node.