Data transfer method
AssigneeFujitsu Limited
InventorMasanori Hashimoto
Life of this patent
Estimating the term…
Abstract
A data transfer method having a data retransmission function, in which a sending side saves data that was sent in memory, a receiving side uses a transmission confirmation signal to request the sending side to retransmit the data when the data was not properly received, then monitors the elapsed time, and when the data is not retransmitted after the elapsed time has exceeded a set time, uses a transmission confirmation signal again to request that the data be retransmitted, and where in response to that transmission confirmation signal, the sending side retransmits the saved data to the receiving side.
Claims9
A data retransmit method of a data communication system in which a receiving side, after receiving data, sends a transmission confirmation signal (ACK or NACK) to a sending side indicating whether or not the data was received properly, and the sending side makes reference to the transmission confirmation signal to identify that the receiving side did not proper receive the data and retransmits that data, the data retransmit method comprising:
- saving at the sending side, the data sent to the receiving side;
- continuing to save the data previously sent to the receiving side even though the sending side confirms that the data previously sent to the receiving side is received properly by a transmission confirmation signal (ACK) corresponding to the data;
- and
- retransmitting the saved data to the receiving side when retransmission of the data is requested from the receiving side.
A radio base station (evolved-UTRAN NodeB) for communicating with a terminal (UE), the radio base station comprising a memory and a processor configured to:
- store the data (Data[n1]) of RLC (Radio Link Control) layer into the memory;
- transmit the data (Data[n1]) to the terminal (UE);
- detect a transmission confirmation signal (ACK[n1] or NACK[n1]) from the terminal, the transmission confirmation signal (ACK[n1] or NACK[n1]) indicating whether or not the data (Data[n1]) is received properly by the terminal;
- hold the previously transmitted data (Data[n1]) in the memory even after detecting the transmission confirmation signal (ACK[n1]) indicating that the previously transmitted data (Data[n1]) is received properly by the terminal.
A terminal (UE) for communicating with a radio base station (evolved-UTRAN NodeB), the terminal comprising a memory and a processor configured to:
- store the data (Data[n1]) of RLC (Radio Link Control) layer into the memory;
- transmit the data (Data[n1]) to the radio base station;
- detect a transmission confirmation signal (ACK[n1] or NACK[n1]) from the radio base station, the transmission confirmation signal (ACK[n1] or NACK[n1]) indicating whether or not the data (Data[n1]) is received properly by the radio base station;
- hold the previously transmitted data (Data[n1]) in the memory even after detecting the transmission confirmation signal (ACK[n1]) indicating that the previously transmitted data (Data[n1]) is received properly by the radio base station.
Dependencies are inferred from the claim text.