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Abstract

A digital mobile communication system has a high-speed non-transparent data connection between a transmitting and a receiving party. For the data connection, parallel subchannels, corresponding in number to the nominal data transfer rate, have been allocated on the radio interface. A radio link protocol is responsible for transmitting data over the radio interface, and for acknowledging correct data frames and for retransmitting defective data frames. A transmission buffer buffers the data frames to be transmitted and stores the data frames transmitted until it receives an acknowledgement of successful reception. In order to reduce interference and power consumption, user data is transmitted by using as many of the allocated subchannels as required by the actual user data rate at any one time. On the other allocated subchannels, transmission is interrupted or discontinuous transmission is applied.

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First Claim