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User equipment that transmits demodulation reference signals (dm-rss)

A demodulation reference signal, DM-RS technology, applied in the direction of signal channel, pilot signal distribution, wireless communication, etc., can solve the problem that the control method has not yet been determined

Active Publication Date: 2020-07-17
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the setting of DM-RS using DFT-s-OFDM and the method of controlling the transmission power of DM-RS using DFT-s-OFDM have not yet been determined in 3GPP WG

Method used

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  • User equipment that transmits demodulation reference signals (dm-rss)
  • User equipment that transmits demodulation reference signals (dm-rss)
  • User equipment that transmits demodulation reference signals (dm-rss)

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Embodiment Construction

[0025] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the embodiments of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known features have not been described in detail in order not to obscure the invention.

[0026] figure 2 is a diagram illustrating a wireless communication system 1 according to one or more embodiments of the present invention. The wireless communication system 1 includes a user equipment (UE) 10 , a base station (BS) 20 and a core network 30 . The wireless communication system 1 may be an NR system. The wireless communication system 1 is not limited to the specific settings described here, and may be any type of wireless communication system,...

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Abstract

User equipment (UE) includes a transmitter that transmits, to a base station (BS), Demodulation Reference Signals (DM-RSs) using Discrete Fourier Transform (DFT)-spread (s)-Orthogonal Frequency-Division Multiplexing (OFDM). The resource elements (REs) that do not multiplex the DM-RSs in an OFDM symbol are set as Null. The transmission power for transmission of the DM-RSs is different from transmission power for transmission of normal DM-RSs. The normal DM-RS is a DM-RS using a Cyclic Prefix (CP)-OFDM. The UE further includes a processor that determines the transmission power for the DM-RSs based on a reciprocal of frequency multiplexing density of the DM-RSs. The transmission power for the DM-RSs is two times more than the normal DM-RSs when a configuration of the DM-RSs is a DM-RS configuration type 1. The transmission power for the DM-RSs is three times more than the normal DM-RSs when a configuration of the DM-RSs is a DM-RS configuration type 2.

Description

technical field [0001] One or more embodiments disclosed herein relate to a user equipment for transmitting an uplink demodulation reference signal (Demodulation Reference Signal, DM-RS) and a method for controlling transmission power of the uplink DM-RS. Background technique [0002] Uplink for New Radio (NR) (Fifth Generation (5G)) has been studied in the 3rd Generation Partnership Project (3GPP) Working Group (WG) Design of demodulation reference signal (DM-RS). The uplink DM-RS includes a front-loaded (Front-Loaded, FL) DM-RS and an additional DM-RS sent after the FL DM-RS is sent. [0003] The FL DM-RS has DM-RS configuration type 1 and DM-RS configuration type 2. Figure 1A with Figure 1B DM-RS configurations of DM-RS configuration type 1 and DM-RS configuration type 2 are shown respectively. exist Figure 1A with Figure 1B In , the horizontal axis represents the Orthogonal Frequency-Division Multiplexing (OFDM) symbol axis (time axis), and the vertical axis repr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04L5/00H04W52/32H04W72/04
CPCH04L5/0007H04L5/0051H04W52/146H04W52/325H04L5/10H04L27/2607H04L27/2636H04W88/02
Inventor 柿岛佑一诸我英之永田聪
Owner NTT DOCOMO INC