Packet transmission method and user equipment

User equipment, comprising:

• a processing circuit, and a communications interface and a storage medium that are connected to the processing circuit, wherein the processing circuit is configured to execute a protocol stack program stored in the storage medium to:
• transmit multiple packets to a receiving node using the communications interface;
• upon determination that a first packet in the multiple packets is lost, retransmit the first packet for a first time using the communications interface;
• in response to determining, based on at least one acknowledgement packet received from the receiving node after the first packet is retransmitted for the first time, that the first packet retransmitted for the first time is lost:
• retransmit the first packet for a second time using the communications interface;
• and
• upon determination that a sending buffer of the user equipment is empty, immediately send, using the communications interface, the first packet for at least once after the first packet is retransmitted for the second time.

A non-transitory computer readable storage medium, comprising a program which, when executed by user equipment, causes the user equipment to perform the following operations:

• transmitting multiple packets to a receiving node;
• upon determination that a first packet in the multiple packets is lost, retransmitting the first packet for a first time;
• in response to determining, based on at least one acknowledgement packet received from the receiving node after the first packet is retransmitted for the first time, that the first packet retransmitted for the first time is lost:
• retransmitting the first packet for a second time;
• and
• upon determination that a sending buffer of the user equipment is empty, immediately sending the first packet for at least once after the first packet is retransmitted for the second time.