US 2010/0250674 A1Published application

Content delivery apparatus, content delivery method, and content delivery program

AssigneePioneer Corporation

InventorsKyoichi Terao, Itaru Takemura

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Abstract

In a content delivery method in a P2P network, a node managing a content causes a downstream node to manage a volume of a divided content; this volume is according to a situation of the downstream node (for example, a line speed to which a node is connected). A node managing a content holds, as management information, partial information of the divided content managed by its own node, and location information indicative of a location at which a content itself is presented. Next, when a content transfer request is sent to a node managing a content, the node accesses a content holding node in accordance with the held location information, downloads a volume of a divided content indicated by the partial information, and uploads the volume of the divided content to a node that sends the content transfer request.

Claims7

Dependent claims

A content delivery apparatus constituting at least one of a plurality of nodes of a P2P network, the P2P network that:

distributes tag information including information of a content, a location of a node in the plurality of nodes that holds the content, and partial information indicative of which parts of the content is held;
searches the tag information to find a desired content;
and
deliveries contents among the plurality of nodes,
a management of a node in the plurality of nodes at least holding management information, the management information including:
location information indicative of a location at which a delivery target content is presented;
and
a partial information of the delivery target content, the content delivery apparatus comprising:
an adjacent node situation obtaining means that obtains information of a situation of a node in the plurality of nodes adjacent to its own node;
a content volume determining means that determines, from the delivery target content managed by its own node, a volume of a part of the delivery target content that the adjacent node is requested to manage;
a content management request means that requests the adjacent node to manage the part of the delivery target content determined by the content volume determining means;
a management information sending means that, when receiving a replay, from the adjacent node, representing management being possible, sends, to the adjacent node, the management information including the partial information based on the volume determined by the content volume determining means;
a tag information distributing means that creates the tag information based on the part of the delivery target content managed by its own node, and sends the created tag information to another node in the plurality of nodes;
a content transfer request receiving means that receives a download request for the delivery target content;
and
a content transfer means that:
when the download request received by the content transfer request receiving means corresponds to the delivery target content managed by its own node, accesses, in accordance with the location information, a node in the plurality of nodes holding the delivery target content;
downloads, in accordance with the partial information, the corresponding part of the delivery target content to its own node;
and
uploads the corresponding part of the delivery target content to a node that sends the download request of the delivery target content.

17 more elements

A content delivery method in a P2P network including a plurality of nodes, the P2P network that:

distributes tag information including information of a content, a location of a node in the plurality of nodes that holds the content, and partial information indicative of which parts of the content is held;
searches the tag information to find a desired content;
and
deliveries contents among the plurality of nodes,
a management of a node in the plurality of nodes at least holding management information, the management information including:
location information indicative of a location at which a delivery target content is presented;
and
a partial information of the delivery target content,
the method comprising:
an adjacent node situation obtaining step that obtains information of a situation of a node in the plurality of nodes adjacent to its own node;
a content volume determining step that determines, from the delivery target content managed by its own node, a volume of a part of the delivery target content that the adjacent node is requested to manage;
a content management request step that requests the adjacent node to manage the part of the delivery target content determined by the content volume determining step;
a management information sending step that, when receiving a replay, from the adjacent node, representing management being possible, sends, to the adjacent node, the management information including the partial information based on the volume determined by the content volume determining step;
a tag information distributing step that creates the tag information based on the part of the delivery target content managed by its own node, and sends the created tag information to another node in the plurality of nodes;
a content transfer request receiving step that receives a download request for the delivery target content;
and
a content transfer step that:
when the download request received by the content transfer request receiving means corresponds to the delivery target content managed by its own node, accesses, in accordance with the location information, a node in the plurality of nodes holding the delivery target content;
downloads, in accordance with the partial information, the corresponding part of the delivery target content to its own node;
and
uploads the corresponding part of the delivery target content to a node that sends the download request of the delivery target content.

18 more elements

Dependencies are inferred from the claim text.