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A random access method and device

A technology of random access and random access request, applied in the field of communication, can solve problems such as partial retransmission of PUSCH, and achieve the effect of improving the success rate and the probability of payload solution

Active Publication Date: 2022-02-22
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present application provides a random access method and device to solve the problem of how to retransmit the PUSCH part in MsgA

Method used

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0032] Some of the terms involved in the embodiments of the present invention are explained below to facilitate understanding of the technical solutions in the embodiments of the present application:

[0033] 1. Four-step random access (4-step RACH)

[0034] 4-step RACH (that is, referring to the common RACH process of the prior art) generally includes the following five steps:

[0035] Step 1: The terminal device sends Msg1 (random access preamble) to the network side de...

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Abstract

Embodiments of the present application provide a random access method and device, which relate to the field of communication technology and are used to solve the problem of how to retransmit the PUSCH part in MsgA. The method includes: receiving random access response information sent by a network side device, where the random access response information is random access response information in two-step random access, and the random access response message carries a target RV version of a corresponding terminal device; In the case that the terminal device performs a fallback from two-step random access to four-step random access, it sends the third message Msg3 to the network side device, Msg3 is the third message in the four-step random access, and the RV version used by Msg3 is Target RV version. The embodiment of the present invention is used for random access.

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] The random access (Random Access) process refers to a process in which a terminal device sends a random access preamble (preamble) to a network side device in an attempt to establish a signaling connection with the network. Random access is used in multiple events such as initial access, Radio Resource Control (RRC) connection recovery, and handover, and is a very important process in a network system. [0003] Contention-based random access includes four-step random access (4-step RACH) and two-step random access (2-step RACH). Among them, the four-step random access process includes: the terminal device sends a random access request (Msg1) to the network side device, and after receiving the Msg1 sent by the terminal device, the network side sends a random access response (Random Access Resp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/004H04W74/006H04W74/0833H04W74/00H04W74/08
Inventor 马玥吴昱民
Owner VIVO MOBILE COMM CO LTD