Relay apparatus, reception apparatus, and communication system

A reception apparatus in a communication system including a transmission apparatus and the reception apparatus which is coupled to the transmission apparatus through a plurality of communication routes via a plurality of relay apparatuses which forward packets transmitted from the transmission apparatus for the reception apparatus, the reception apparatus comprising:

• a receiver configured to receive sequential packets from the transmission apparatus via the plurality of relay apparatuses respectively, the transmission apparatus distributing the sequential packets for the reception apparatus among the plurality of relay apparatuses, for each relay apparatus of the plurality of the relay apparatuses, the relay apparatus storing distributed sequential packets of the sequential packets in a memory in sequential order, the distributed sequential packets are distributed and transmitted to the relay apparatus by the transmission apparatus, selecting a discard packet from the distributed sequential packets based on a discard condition, and adding a discard information to a previous packet and to transmit the previous packet, the discard information indicates a sequence number of the discard packet to be discarded, and the previous packet is one of the distributed sequential packets before the discard packet in sequential order;
• and
• a transmitter configured to transmit the sequential packets in sequential order, without waiting a reception of the discard packet based on the discard information.

A communication system comprising:

• a transmission apparatus;
• a plurality of relay apparatuses;
• and
• a reception apparatus which is coupled to the transmission apparatus through a plurality of communication routes via the plurality of relay apparatuses which forward packets transmitted from the transmission apparatus for the reception apparatus;
• wherein
• the transmission apparatus is configured
• to distribute sequential packets for the reception apparatus among the plurality of relay apparatuses, and
• to transmit the sequential packets to the plurality of relay apparatuses respectively, and
• for each relay apparatus of the plurality of the relay apparatuses, the relay apparatus is configured
• to store distributed sequential packets of the sequential packets in a memory in sequential order, the distributed sequential packets are distributed and transmitted to the relay apparatus by the transmission apparatus,
• to select a discard packet from the distributed sequential packets based on a discard condition, and
• to add a discard information to a previous packet and to transmit the previous packet, the discard information indicates a sequence number of the discard packet to be discarded, and the previous packet is one of the distributed sequential packets before the discard packet in sequential order.