Patent ID: 8233483
Filing Date: 2012-07-31
Classification: H04L

Abstract:
1. A communication apparatus to be used for an arrangement connecting a transmitter and a receiver to each other by a plurality of networks where no inversion of packet sequence takes place, said apparatus comprising: a plurality of sequence buffers arranged at the respective networks to accumulate packets until a sequence acknowledgement; a takeout control section configured to determine, for the plurality of sequence buffers, whether or not an expected packet, which is to be taken out next from the sequence buffers buffer in turn, is a leading packet stored in the sequence buffer in turn and, if the expected packet is the leading packet stored in the sequence buffer in turn, to take out the expected packet from the sequence buffer in turn; and an absence detecting section configured to be activated when the takeout control section does not take out the expected packet from any of the plurality of sequence buffers, and to determine occurrence of a loss of the expected packet when one or more packets are accumulated in all of the plurality of sequence buffers.