A data transmission method and device

Abstract

Embodiments of the present application provide a data transmission method and device, in order to avoid communication failure during sidelink transmission. The method includes: the first terminal device acquires first information, and the first information includes a first time unit and a first resource configuration parameter; based on the correspondence between the first time unit and the first resource configuration parameter, the first terminal device The time unit uses the transmission resource corresponding to the first resource configuration parameter to send data to the second terminal device through a sidelink, where the sidelink is a wireless transmission link between the first terminal device and the second terminal device. The second terminal device obtains the first information, and based on the correspondence between the first time unit and the first resource configuration parameter, the second terminal device uses the transmission resource corresponding to the first resource configuration parameter in the first time unit, and receives the information through the sidelink Data from the first terminal device. The embodiment of the present application is applied to an LTE or NR network.

Description

technical field [0001] The present application relates to the field of communications, and in particular, to a data transmission method and apparatus. Background technique [0002] Vehicle to everything (V2X) is one of the fields with the most industrial potential and the clearest market demand in the IoT system. The Internet of Vehicles refers to providing vehicle information through sensors or in-vehicle terminals mounted on the vehicle, and realizing mutual communication between vehicles and vehicles, vehicles and people, vehicles and roadside infrastructure, and vehicles and networks through various communication technologies. 3GPP has conducted a project research on V2X since the long term evolution (LTE) R14 version, and proposed a method such as figure 1 The V2X communication architecture shown includes two communication interfaces, namely the V2X PC5 interface (also known as a direct-connect channel or direct-connect interface) and a V2X Uu (air interface) interface...

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Problems solved by technology

like figure 2 As shown, if the numerology or resource pool determined by the Tx UE and the Rx UE are inconsistent, it will cause communication failure

[0004] In V2X Uu interface communication, the base station can schedule UE's BWP or numerology through downlink control information (DCI), but this method is difficult to extend to SL transmission (V2X PC5 interface communication)

This is because the Rx UE transmitted by SL may be outside the coverage of the base station and cannot receive the DCI sent by the base station

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