Method and device for improving reliability of communication between vehicles

Abstract

The embodiment of the invention provides a method and device for improving the reliability of communication between vehicles. In one embodiment of the invention, the method comprises the steps: selecting c OFDM symbols on a physical resource block, wherein c is not less than three; transmitting pilot frequency sequences on an even number of subcarriers in the selected c OFDM symbols, and transmitting the pilot frequency sequences at zero power on an odd number of subcarriers in the selected c OFDM symbols, so as to enable each OFDM symbol for transmitting the pilot frequency sequences to be divided into a front half OFDM symbol and a rear half OFDM symbol in the time domain, wherein the front half OFDM symbol and the rear half OFDM symbol are the same. Through the configuration of the receiving and transmitting of the pilot frequency sequences, the method not only can achieve the precise channel estimation under the condition of quick channel fading during the vehicle-to-vehicle transmission, but also can achieve the precise frequency offset evaluation and compensation in the frequency domain at the same time.

Description

technical field [0001] Embodiments of the present disclosure relate to mobile communication technologies, and in particular to methods and devices for improving the reliability of vehicle-to-vehicle communication. Background technique [0002] In June 2015, 3GPP started a research project on LTE-based V2X (Vehicle to X, X means vehicle, pedestrian or cellular network), with the aim of realizing vehicle interconnection based on the widely used LTE network for the automotive industry. Through LTE-based V2X, a vehicle can connect to the Internet and connect with other vehicles, thereby enabling the vehicle to use various existing and / or future services. [0003] LTE-based V2X projects include: 1.V2V (vehicle-to-vehicle communication, vehicle-to-vehicle); 2.V2P (vehicle-to-pedestrian communication, vehicle-to-pedestrian); 3.V2I / N (vehicle-to-network communication, vehicle-to-infrastructure / network). V2V services include communication between vehicles through a direct air inter...

AI Technical Summary

Problems solved by technology

[0007] Second, another technical challenge is the impact of frequency offset on V2V transmission performance

This frequency offset will destroy the orthogonality between subcarriers and cause mutual interference between subcarriers, thus degrading the performance and reliability of V2V transmission.

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