The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2007
Filed:
Jun. 23, 2000
Seiji Okumura, Tokyo, JP;
Seiji Okumura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
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.