Title:
ハイブリッドARQ方法及びハイブリッドARQ送信機
Document Type and Number:
Japanese Patent JP3629263
Kind Code:
B2
Abstract:
The invention provides a hybrid ARQ technique for transmitting a data unit on a radio channel in a communication system to a receiver. After encoding the data unit into a sequence of code words using an encoding parameter, a first code word is transmitted, and an ACK or NAK is received from the receiver. If a NAK is received, the next code word of the sequence is transmitted. According to the invention, a measurement value indicating the current channel conditions is determined by counting the NAK messages and/or evaluating the encoding parameters. Preferably the measurement values are the overall coding rate, the average number of retransmissions per data unit, and the average number of retransmissions per code word. In the preferred embodiment, the transmitter comprises a NAK counter. Besides the improved transmission measurement, the present invention provides using this measurement for adaptation purposes.
Inventors:
Gorjek Alexander
Seidel Eiko
Seidel Eiko
Application Number:
JP2002558676A
Publication Date:
March 16, 2005
Filing Date:
January 17, 2001
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
C08B1/00; C08B15/02; C13K1/02; H04L1/00; H04L1/18; H04L1/20; H04W28/00; H04W28/04; H04W28/18; (IPC1-7): H04L1/18; H04L1/00; H04Q7/38
Domestic Patent References:
| JP2000224226A |
Attorney, Agent or Firm:
Koichi Washida
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