Abstract: The present invention relate to a content caching device, and more particularly, to such a content caching device in which the priority of a content requested by a user terminal is calculated based on content usage features such as the number of requests or the latest request interval of the requested content, and the like, the requested content is controlled to be selectively stored in a short-term storage unit based on the calculated priority of the requested content, and among the contents stored in the short-term storage unit, a content needed to be stored for a long time period is controlled to be stored in a separate long-term storage unit based on the storage time of the requested content in the short-term storage unit.

Abstract: A communication device operating as a node constituting a multi-hop network in which a plurality of different networks are mixed, a method for detecting a hub, and a method for transmitting a packet are provided. The communication device includes: a hub detection unit configured to determine whether or not the communication device operates as a hub; a pheromone calculation unit configured to calculate a pheromone value according to whether or not the communication device is a hub; a transmission unit configured to broadcast the pheromone value to neighbor nodes; a reception unit configured to receive the pheromone value from each of the neighbor nodes; and a forwarding node selecting unit configured to compare the pheromone values of the neighbor nodes and select a neighbor node having the greatest pheromone value as a forwarding node to which a packet is to be transmitted.

Abstract: The present invention relate to a content caching device, and more particularly, to such a content caching device in which the priority of a content requested by a user terminal is calculated based on content usage features such as the number of requests or the latest request interval of the requested content, and the like, the requested content is controlled to be selectively stored in a short-term storage unit based on the calculated priority of the requested content, and among the contents stored in the short-term storage unit, a content needed to be stored for a long time period is controlled to be stored in a separate long-term storage unit based on the storage time of the requested content in the short-term storage unit.