A data transmission method, terminal and base station

Abstract

The invention discloses a data transmission method, a terminal and a base station. The method comprises the steps that the terminal sends a first uplink physical frame to the base station; the terminal receives a downlink physical frame returned by the base station, the downlink physical frame comprises a session check code, and the session check code is determined by data in one uplink physical frame received by the base station and data in the downlink physical frame except the session check code; and the terminal determines a local session check code through the downlink physical frame andthe first uplink physical frame, if the local session check code is the same as the session check code, the downlink physical frame is response information of the base station for the first uplink physical frame, or else the downlink physical frame is not the response information of the base station for the first uplink physical frame. Based on the session check code, the MAC address of the head of the downlink data packet is removed, and the terminal judges whether the downlink data packet is sent to the terminal or not through the session check code, so that the resource cost for sending theMAC address is greatly saved.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a data transmission method, a terminal and a base station. Background technique [0002] Low Power Wide Area Network (LPWAN) is an IoT communication technology. Its main communication mode is: the terminal sends uplink data packets to the base station. The uplink data packets are usually data collected by sensors, such as: temperature, humidity data. After receiving the uplink data packet, the base station returns a response data packet to the terminal, for example: replying to the terminal that the uplink data packet has been successfully received. [0003] In the communication process between a base station and multiple terminals, usually, when a terminal sends a data packet to the base station, it needs to send its own Media Access Control (MAC) address at the header of the data packet to allow the base station to identify the Which terminal the uplink...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the purpose of the present invention is to solve the problem that both uplink data packets (hereinafter referred to as data packets) and downlink response data packets (hereinafter referred to as response data packets) in existing LPWAN communications include MAC addresses, which take up a large amount of transmission time. overhead, and when working in TDD mode, once the header of the data packet is judged incorrectly, it may lead to technical problems of incorrect reception of multiple TDD time slots

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