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Method for performing random access and terminal for performing same

專利號
US10791541B2
公開日期
2020-09-29
申請人
LG ELECTRONICS INC.（KR Seoul）
發(fā)明人
Seunggye Hwang; Yunjung Yi; Kijun Kim; Seonwook Kim
IPC分類
H04W72/02; H04L27/26; H04W72/04; H04W74/08; H04L29/08; H04L12/24; H04L29/06; H04W76/10; H04L5/00
技術(shù)領(lǐng)域
ue,numerology,prach,preamble,random,access,resource,enodeb,dci,in
地域： Seoul

摘要

A disclosure of the present specification provides a method for performing random access by a terminal. The method may comprise the steps of: selecting, by the terminal, a first resource among a plurality of resources for a physical random access channel (PRACH), wherein the plurality of resources exist for each numerology, and the numerology is defined by a cycle prefix (CP) length and a subcarrier spacing; and transmitting, by the terminal, the PRACH on the first resource through a first numerology when the selected first resource is for the first numerology.

說明書

FIG. 9 is a Diagram Showing a Non-Contention-Based Random Access Method.

Unlike the contention-based random access, non-contention-based random access can be terminated when UE receives a random access response.

Non-contention-based random access can be initiated in response to handover and/or a request, such as a command from an eNodeB. In the two cases, contention-based random access can be performed.

UE receives a designated random access preamble without a contention possibility from an eNodeB. The allocation of the random access preamble may be performed in response to a handover command and a PDCCH command (S910).

After the random access preamble designated to the UE is allocated to the UE, the UE transmits the corresponding random access preamble to the eNodeB (S920).

When the random access preamble is received, the eNodeB transmits a random access response to the UE as a response (S930). For a procedure related to the random access response, reference can be made to S820 of FIG. 8.

A method for a contention resolution in random access is described below.

權(quán)利要求

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