PACKET DISTRIBUTION SYSTEM, CONTROL DEVICE AND CONTROL METHOD

摘要

A packet distribution system includes: a first transfer device that is placed on a boundary of a core network and near first and second terminal devices; a second transfer device that is placed on the boundary of the core network and near a content distribution device; and a control device that, when a first content packet is distributed to the first terminal device, a distribution request packet is transmitted from the second terminal device, and a second content packet newly distributed from a content distribution device to the second terminal device is detected by the second transfer device, causes the second transfer device to abandon the second content packet based on control information included in the second content packet, and causes the first transfer device to copy the first content packet distributed to the first terminal device, to the second terminal device.

主权项

1. A packet distribution system comprising:
a first transfer device that transfers a packet, and is placed on a boundary of a core network and near first and second terminal devices, each of the first and the second terminal devices transmitting a distribution request packet which requests the distribution of a same content; a second transfer device that transfers a packet, and is placed on the boundary of the core network and near a content distribution device, the content distribution device distributing a first content packet relating to the content to any one of the first and the second terminal devices which has transmitted the distribution request packet, according to the distribution request packet transmitted from any one of the first and the second terminal devices; a control device that controls the operation of the first and the second transfer devices; the control device including: an abandon controller that, when the first content packet is distributed to one of the first and the second terminal devices, the distribution request packet is transmitted from another one of the first and the second terminal devices, and a second content packet newly distributed from the content distribution device to the another one of the first and the second terminal devices is detected by the second transfer device, causes the second transfer device to abandon the second content packet based on control information included in the detected second content packet; and a copy controller that causes the first transfer device to copy the first content packet distributed to one of the first and the second terminal devices to the another one of the first and the second terminal devices.