TRANSMISSION METHOD FOR UPLINK DATA PACKET, TERMINAL DEVICE, BASE STATION AND COMMUNICATION SYSTEM

摘要

Provided are a transmission method for an uplink data packet, a terminal device and a base station. The method comprises: a terminal device determining a CP length of a first uplink data frame; if the terminal device is in a state of losing uplink synchronization with a base station and is in an RRC connection state, or is in an RRC idle state, the terminal device generating the first uplink data frame for an uplink data packet according to the CP length,wherein the CP length of the first uplink data frame is greater than a CP length of an uplink data frame sent by the terminal device which is in an uplink synchronization state and is in an RRC connection state; and the terminal device sending the first uplink data frame to the base station. By means of the transmission method of the present invention, signalling flows such as random access and uplink synchronization can be avoided, so that a terminal device can directly send an uplink data packet by one-time signalling interaction, thereby improving the resource utilization rate and reducing the power consumption.