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Method and apparatus for improving reliability of vehicle-to-vehicle communication

A technology for vehicle communication and reliability, applied in channel estimation, pilot signal allocation, multiple use of transmission paths, etc., can solve the problem of V2V transmission performance and reliability degradation, frequency offset V2V transmission performance, and destruction of sub-carrier orthogonality. and other issues to achieve the effect of enhancing security and reliability, significantly improving performance, and improving performance.

Active Publication Date: 2020-03-27
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Method and apparatus for improving reliability of vehicle-to-vehicle communication
  • Method and apparatus for improving reliability of vehicle-to-vehicle communication
  • Method and apparatus for improving reliability of vehicle-to-vehicle communication

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Embodiment Construction

[0027] The framework and ideas of the present disclosure are first described below. The basic idea of ​​the present disclosure is that by configuring the transmission and reception of the pilot sequence, not only accurate channel estimation can be realized in the case of fast channel fading during V2V transmission, but also accurate frequency offset estimation and compensation can be realized in the frequency domain at the same time. In addition, considering that different vehicle transmissions are multiplexed by Frequency Division Multiplexing (FDM), and different vehicle transmissions have independent frequency offsets, the embodiments of the present disclosure implement frequency offset compensation in the frequency domain.

[0028]Specifically, in the embodiments of the present disclosure, more Orthogonal Frequency Division Multiplexing (OFDM) symbols (for example, greater than or equal to 3) are used in the allocated or selected physical resource blocks to transmit the gui...

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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 direct air interfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L25/02H04L27/00H04L27/26
CPCH04L5/0048H04L25/024H04L27/0014H04L27/2666H04L2027/0026
Inventor 李栋刘勇
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD