A method, device and system for sending a random access preamble

A technology of random access preamble and random access process, applied in the field of communication, can solve the problems of ambiguity in base station detection and mutual interference of terminal equipment, and achieve the effect of avoiding interference, reducing time, and avoiding detection ambiguity.

Active Publication Date: 2021-05-18
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] However, when the LTE system communicates on a higher operating frequency or the mobile speed of the terminal equipment is very high, the PRACH subcarrier spacing of the Doppler freq

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  • A method, device and system for sending a random access preamble
  • A method, device and system for sending a random access preamble
  • A method, device and system for sending a random access preamble

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[0403]The network architecture and the service scenario described in the embodiment of the present invention are for more clear explanation of the technical solutions of the embodiments of the present invention, and is not intended to limit the technical solutions provided in the embodiments of the present invention, and those skilled in the art, as the network The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present invention apply to similar technical problems.

[0404]It should be understood that the technical solution of the embodiments of the present invention can be applied to various communication systems, such as long-term evolution, LTE frequency division duplex, FDD system, LTE time division duplex ( Time Division Duplex, TDD) Communication System, etc.

[0405]It should also be understood that in the embodiment of the present invention, the terminal device can be used as a terminal (User Eq...

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Abstract

The present application relates to the field of mobile communication, in particular to the random access technology in the wireless communication system. This application provides a random access preamble sending method, device and system. In this solution, the terminal device acquires a cyclic shift value that satisfies a high-speed mobile scenario, and sends a random access preamble sequence corresponding to the cyclic shift value. Because the influence brought by the high-speed mobile scene is considered when determining the random access preamble sequence, in the high-speed scene, interference between terminal devices is avoided.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method, device and system for sending a random access preamble. Background technique [0002] The terminal equipment communicates with the base station in the case of high-speed movement. There is a frequency difference between the frequency of the terminal equipment transmitting signal and the frequency received by the base station, which is called Doppler frequency shift f D ,and Among them, f is the carrier frequency, v is the moving speed, and c is the speed of light. The Doppler frequency shift will cause mutual interference between terminal devices during random access, and will also cause fuzzy detection when the base station detects the random access preamble sent by the terminal device. [0003] In the existing Long Term Evolution (LTE, Long Term Evolution) system, a special design is made for the PRACH subcarrier spacing with a Doppler frequency shift less tha...

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2613H04W74/0833H04J13/0062H04L27/2691H04L27/2692H04L27/2657H04J11/0026H04L27/26
Inventor 赵越郭志恒吴强程型清
Owner HUAWEI TECH CO LTD
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