Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2007-02-20
2007-02-20
To, Doris H. (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
Reexamination Certificate
active
10069246
ABSTRACT:
In a packet retransmission system for retransmitting a packet where a sequence number is added between the transmission apparatus and the reception apparatus at a loss of the packet in packet transmission, a transmission apparatus for transmitting the packet, a reception apparatus connected to the transmission apparatus through a network, and a requestor (application) connected to the reception apparatus are provided. The transmission apparatus includes a retransmission buffer for storing the packet having been transmitted to the reception apparatus, retransmission-request receiving means for identifying the sequence number and the largest sequence number in a retransmission-request packet received from the reception apparatus and notifying the sequence number and the largest sequence number, retransmission packet detecting means for detecting a packet to be retransmitted based on the notified sequence number, and retransmission means for retransmitting the packet to be retransmitted to the reception apparatus. The reception apparatus includes a reception buffer for storing the packet received from the transmission apparatus, receiving means for storing the packet received from the transmission apparatus in the reception buffer with sorting the packet in order of the sequence number, packet loss detecting means for detecting a packet loss, retransmission sequence number adding means for instructing to add the sequence number of the detected lost packet to a retransmission-request list, retransmission-request list managing means for adding the sequence number to the retransmission-request list based on the instruction to add, retransmission-request transmitting means for putting the sequence number stored in the retransmission-request list, in a retransmission-request packet and sending the retransmission-request packet to the transmission apparatus, and packet providing means for providing the packet in the reception buffer to the requestor.
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Audio/Video Transport Working Group, Internet Draft draft-miyazaki-avt-rtp-selret-00.txt, Mar. 1, 2000, Akihiro Miyazaki et al., “RTP Payload Type Format to Enable Selective Retransmissioins”.
Audio/Video Transport Working Group, Internet Draft draft-miyazaki-avt-rtp-selret-01.txt, (Jul. 14, 2000), Akihiro Miyazaki et al., “RTP Payload Type Format to Enable Selective Retransmissioins”.
Mitsubishi Denki & Kabushiki Kaisha
To Doris H.
Wilson Robert W.
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