초록 ▼

A digital mobile communication system has a high-speed non-transparent data connection between a transmitting and a receiving party (MS, TAF). For the data connection, parallel subchannels (ch1-chn), corresponding in number to the nominal data transfer rate, have been allocated on the radio interfac

A digital mobile communication system has a high-speed non-transparent data connection between a transmitting and a receiving party (MS, TAF). For the data connection, parallel subchannels (ch1-chn), corresponding in number to the nominal data transfer rate, have been allocated on the radio interface. A radio link protocol (RLP) is responsible for transmitting data over the radio interface, and for acknowledging correct data frames and for retransmitting defective data frames. A transmission buffer (63) 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 activated.

대표청구항 ▼

[ We claim:] [1.] A method for high-speed data transfer in a digital mobile communication system, the method comprising the steps ofestablishing a non-transparent data connection having a number of parallel subchannels allocated on the radio interface, said number being determined by a specific maxi

[ We claim:] [1.] A method for high-speed data transfer in a digital mobile communication system, the method comprising the steps ofestablishing a non-transparent data connection having a number of parallel subchannels allocated on the radio interface, said number being determined by a specific maximum transfer capacity;receiving user data from a terminal interface at a varying user data rate;transmitting user data over the non-transparent data connection in data frames by employing a communication protocol which acknowledges data frames received correctly and retransmits defective data frames;buffering data frames to be transmitted in a transmission buffer;storing the data frame transmitted in the transmission buffer for a possible retransmission until an acknowledgement is received from the receiving end;determining the actual user data rate on the terminal interface;determining a minimum number of subchannels, said number being determined by the actual user data rate;transmitting user data in data frames only via specific subchannels corresponding in number to said minimum number of subchannels;interrupting transmission or activating discontinuous transmission on each surplus subchannel allocated to the connection;monitoring fill level of the transmission buffer;continuing transmission or deactivating discontinuous transmission on at least one of said surplus subchannels if the transmission buffer fill level reaches a first threshold value; andinterrupting transmission or reactivating discontinuous transmission on at least one of said surplus subchannels if the transmission buffer fill level decreases to a second threshold level.