Patent ID: 8898534
Filing Date: 2014-11-25
Classification: H04L,H04W

Abstract:
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.