Method and device for transmitting data in unlicensed cell, base station and user equipment

A method for transmitting data in an unlicensed cell, applied to user equipment (UE), the method comprising:

• receiving scheduling information transmitted by a base station;
• determining, according to the scheduling information, that the base station transmits downlink data in an ascending order of data size, and a size of downlink data transmitted each time;
• and
• enabling a buffer area of a corresponding size according to the size of the downlink data currently to be received.

A base station, comprising:

• a processor;
• and
• a memory for storing processor-executable instructions;
• wherein the processor is configured to:
• perform Listen before Talk (LBT) detection on a current channel;
• in response to detecting that the current channel is idle, transmit first downlink data to user equipment (UE) using a current minimum scheduling resource;
• and
• in response to receiving feedback information indicating the UE successfully receives the first downlink data, increase the scheduling resource until the scheduling resource reaches a preset size, and transmit second downlink data to the UE using the scheduling resource of the preset size, wherein the preset size refers to is a maximum size of the scheduling resource that can be used when data is transmitted through the current channel.

User equipment, comprising:

• a processor;
• and
• a memory for storing processor-executable instructions;
• wherein the processor is configured to:
• receive scheduling information transmitted by a base station;
• determine, according to the scheduling information, that the base station transmits downlink data in an ascending order of data size, and a size of downlink data transmitted each time;
• and
• enable a buffer area of a corresponding size according to the size of the downlink data currently to be received.