Patent ID: 8665872
Filing Date: 2014-03-04
Classification: H04L

Abstract:
1. A transmission apparatus comprising: a receiver circuit that receives a packet from a ring network; a determination circuit that determines whether the packet received by the receiver circuit is addressed to a local network, and whether the packet is allowed to circulate based on information that is included in a frame of the packet and indicates a number of times for which the packet circulates in the ring network, and determines a number of times when the packet is allowed to circulate and discards the packet when the packet is not allowed to circulate; a storage that stores one or more packets addressed to the local network; a detection circuit that detects whether the memory capacity of the storage is sufficient to store the received packet; and a transmitter circuit that sends the packet over the ring network when the determination circuit determines that the packet is addressed to the local network, when the detection circuit detects that the memory capacity of the storage is not sufficient to store the received packet, and when the packet is not discarded.