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A random access method and device

A technology of random access and communication device, which is applied in the field of communication and can solve the problems of easy access to pseudo base stations and the like

Active Publication Date: 2022-04-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a random access method and device to solve the problem in the prior art that terminal equipment is easy to access pseudo base stations when performing random access

Method used

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  • A random access method and device

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Embodiment Construction

[0042] The present application provides a method and device for random access, which are used to solve the problem in the prior art that terminal equipment is easy to access a pseudo base station when performing random access.

[0043] In a mobile communication system, to access a mobile network, a terminal device needs to go through processes such as cell search, cell selection, and random access (RA). Wherein, the purpose of the random access is to enable the terminal device to obtain uplink scheduling resources and a time advance (time alignment, TA) from the base station, so that the terminal device accesses the base station and maintains an uplink synchronization state. After the terminal device successfully performs random access, the terminal device can establish a connection with the network through the base station.

[0044] The terminal device and the base station do not achieve uplink synchronization, the terminal device performs cell handover, or the terminal devic...

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Abstract

A random access method and device are used to solve the problem in the prior art that terminal equipment is easy to access a pseudo base station when performing random access. In this application, the base station receives the first message from the terminal equipment, and the first message is used to request random access to the base station; then the base station determines the cell wireless network temporary identifier according to the preamble included in the first message, wherein the cell wireless network temporary The identification is the identification of the terminal device in the cell; afterward, the base station scrambles the second message according to the temporary wireless network identification of the cell to obtain a third message, and the second message is a response message to the first message; finally, the base station sends a message to the terminal device Send the third message. When the source base station scrambles the second message, it uses the temporary wireless network identifier of the cell that is not easily obtained by the fake base station, so that the second message counterfeited by the fake base station cannot be successfully descrambled on the terminal device side, thereby effectively preventing the terminal device from Access to pseudo base station.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a random access method and device. Background technique [0002] In order to be able to access the network, after selecting the target cell, the terminal device will perform a random access process to apply for uplink resources to the base station in the target cell and establish uplink synchronization with the base station. When performing random access, multiple signaling interactions will be performed between the terminal device and the base station, but there is no corresponding protection measure for the signaling sent during the random access process. During the process, the pseudo base station can also send signaling to the terminal device, but the terminal device cannot identify the pseudo base station, and eventually the terminal device will connect to the pseudo base station. [0003] To sum up, the existing random access scheme makes it easy for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/00H04W74/08H04W76/11
CPCH04W74/0833H04W74/002H04W76/11
Inventor 金文君熊晓春刘星
Owner HUAWEI TECH CO LTD