Data transmission apparatus and method

Details Data transmission apparatus and method Data transmission apparatus and method

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 1/00 (2006.01) H04L 1/16 (2006.01) H04L 1/18 (2006.01)

Patent

CA 2355035

A data transmitter (10) transmits packets each with a sequence number and a priority added. A data receiver (20) detects any packet loss by referring to the sequence numbers added to the packets, and if detecting any packet of high priority as having been lost, requests for packet retransmission. Based on information about thus detected packet loss, the data receiver (20) generates and transmits an RR packet (110) indicating the packet reception state. The data transmitter (10) extracts, from the RR packet (110), a packet loss ratio (200), and selects a manner of priority assignment and reassigns a priority to a packet requested by the data receiver (20).

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