| 摘要 |
PROBLEM TO BE SOLVED: To guarantee the reliability and real time ability of transmission data by controlling retransmission and error correction in accordance with the content of transmission data. SOLUTION: A control part 21 of a base station 2 receiving a packet from a server checks the network layer of the data packet and a transport layer header. A control part 3 transmits an instruction corresponding to information of the respective fields of transmission control protocol(TCP)/user datagram protocol(UDP) headers to an error correction control part 22 and a retransmission control part 23. The control part 23 adds an error correction code to a data link header and sets/transmits information on effect that retransmission is not controlled. Data is received by a portable radio terminal 4 and a control part 41 checks the data link header and it recognizes that it is not necessary to control the retransmission of the packet but error correction information is added. The control part 41 gives the instruction of the decoding of error correction to an error correction control part 42. |
