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Terminal and communication method

A terminal and control channel technology, applied in wireless communication, signaling allocation, transmission path sub-channel allocation, etc., can solve problems such as increased propagation loss

Pending Publication Date: 2021-10-08
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Propagation loss increases in the high frequency band, so in order to compensate for this propagation loss, studies are being made to increase received power by applying beamforming with a narrow beam width to wireless signals (for example, non-patent document 2)

Method used

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  • Terminal and communication method
  • Terminal and communication method
  • Terminal and communication method

Examples

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Embodiment Construction

[0025] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the embodiment described below is an example, and the embodiment to which this invention is applied is not limited to the following embodiment.

[0026] Existing technologies are suitably used in the operation of the wireless communication system of the embodiment of the present invention. Wherein, the existing technology is, for example, the existing LTE, but not limited to the existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification is assumed to have a broad meaning including LTE-Advanced and LTE-Advanced and subsequent schemes (eg, NR).

[0027] In addition, in the embodiments of the present invention described below, SS (Synchronization signal), PSS (Primary SS), and SSS (Secondary SS) used in conventional LTE are used. , PBCH (Physical broadcast channel (Physical broadcast channel)), PRACH (Physical random acces...

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Abstract

A terminal comprises a control unit that determines a spatial reception parameter of a control channel on the basis of the quasi-co-location (QCL) information related to a synchronization signal or a reference signal; and a reception unit that receives the control channel on the basis of the determined spatial reception parameter, wherein in a case of performing beam failure recovery (BFR) by applying a contention-based random access procedure, the control unit assumes, as a QCL parameter of monitoring a downlink control channel in a search space, a QCL parameter associated with synchronization signal block (SSB) detected so as to select a random access preamble in the contention-based random access procedure.

Description

technical field [0001] The present invention relates to a terminal and a communication method in a wireless communication system. Background technique [0002] In NR (New Radio) (also referred to as "5G"), which is a successor system to LTE (Long Term Evolution), a system that satisfies large capacity and fast data transmission is being studied as requirements Technologies such as speed, low delay, simultaneous connection of a large number of terminals, low cost, power saving, etc. (for example, non-patent document 1). [0003] In NR, a higher frequency band is used than in LTE. Propagation loss increases in high frequency bands, and in order to compensate for this propagation loss, research has been conducted on applying beamforming with a narrow beam width to radio signals to increase received power (for example, Non-Patent Document 2). [0004] prior art literature [0005] non-patent literature [0006] Non-Patent Document 1: 3GPP TS 38.300 V15.3.0 (2018-09) [0007...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/28H04W72/04H04L27/26H04B7/06H04W74/08
CPCH04W16/28H04L5/0053H04L27/26136H04W76/19H04B7/0695H04W72/046H04W74/0833H04B7/0602H04B17/373H04W72/23H04W24/08H04W56/001H04W74/0841
Inventor 高桥秀明武田一树松村祐辉
Owner NTT DOCOMO INC
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