Data transfer method
First Claim
1. 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.
2 Assignments
0 Petitions
Accused Products
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.
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Citations
9 Claims
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1. 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:
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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.
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2. 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:
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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. - View Dependent Claims (3, 4, 5)
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6. A terminal (UE) for communicating with a radio base station (evolved-UTRAN NodeB), the terminal comprising a memory and a processor configured to:
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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. - View Dependent Claims (7, 8, 9)
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Specification