A data transmission method, terminal and base station

Abstract

The invention provides a data transmission method, a terminal and a base station and relates to the field of internet. The method includes the following steps: the base station judges whether to adjust a coverage enhancement scheme which is currently used for the terminal; if so, the base station sends a coverage enhancement adjustment instruction to the terminal, wherein the coverage enhancement adjustment instruction includes a coverage enhancement type; the terminal is enabled to adjust a coverage enhancement scheme, which is currently used by the terminal, according to the coverage enhancement adjustment instruction; and the base station adjusts the coverage enhancement scheme which is currently used to the terminal and adopts the adjusted coverage enhancement scheme to transmit data. The data transmission method is capable of carrying out closed-loop adjustment on the coverage enhancement scheme which is currently used by the terminal so that the coverage enhancement scheme currently used by the terminal is capable of meeting demands of the terminal and at the same time, the data transmission efficiency can be improved.

Description

technical field [0001] The present invention relates to the field of the Internet of Things, in particular to a data transmission method, a terminal and a base station. Background technique [0002] With the rapid development of Internet of Things technology, GSM (Global System for Mobile communications, Global System for Mobile Communications) / GPRS (General Packet Radio Service, General Packet Radio Service technology) terminals in M2M (machine-to-machine, machine-to-machine) applications are gradually Replaced by MTC (machine type communication, machine type communication) terminals, and some MTC terminals due to the special environment, such as electric meters or water meters placed in the basement, the loss of data between the base station and the MTC terminal during transmission may be Compared with the loss caused by the communication between the base station and the traditional terminal, it is larger. Therefore, a certain coverage enhancement scheme needs to be adopt...

AI Technical Summary

Problems solved by technology

[0005] During data transmission between the base station and the MTC terminal, the uplink loss may change, the downlink loss may change, the measured uplink loss may be inaccurate, the measured downlink loss may be inaccurate, the estimated uplink loss may be inaccurate or the measured The downlink loss may be inaccurate. When the uplink loss decreases and the actual uplink loss is larger than the measured or estimated uplink loss, the uplink enhancement scheme is still used to transmit uplink data, which will lead to low uplink data transmission efficiency; similarly, when the downlink loss When the actual downlink loss is larger than the measured or estimated downlink loss, the determined downlink enhancement scheme is still used to transmit downlink data, which will lead to low efficiency of downlink data transmission

When the uplink loss increases and the actual uplink loss is smaller than the measured or estimated uplink loss, the determined uplink coverage enhancement scheme is still used to transmit uplink data, and the MTC terminal cannot obtain the required services; similarly, when the downlink loss increases, The actual downlink loss is smaller than the measured or estimated downlink loss, and the determined downlink coverage enhancement scheme is still used to transmit downlink data, and the MTC terminal cannot obtain the required service

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