Selective data retransmission method and system, storage medium and electronic equipment

The invention relates to a selective data retransmission method and system, a storage medium and electronic equipment, and the method comprises the steps: when receiving an ith data packet in m data packets sent by a sender, analyzing the ith data packet to obtain a sequence number and a descriptor of at least one subframe of the sequence number; storing a descriptor of at least one sub-frame of the ith data packet into an off-chip memory, and marking a bit, corresponding to the sequence number, in the first bitmap; and determining whether there is data packet loss according to the first bitmap, if yes, generating a receiving failure message according to the serial number of the at least one lost data packet, and sending the receiving failure message to the sender, so that the sender selectively retransmits the at least one lost data packet. According to the invention, the received descriptor is stored in the off-chip memory to reduce the area of the chip, and when the data packet is lost, the sender only ret