IP Library › Patent Application 16342373
Patent Application
App. No. 16/342,373

BASE STATION APPARATUS, TERMINAL APPARATUS, AND COMMUNICATION METHOD

Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US None
App. No.
16/342,373
Abstract

A base station apparatus includes a downlink reference signal generation unit configured to generate a first demodulation reference signal and a second demodulation reference signal that are reference signals used to demodulate a data signal, and a radio transmitting unit configured to transmit the first demodulation reference signal, the second demodulation reference signal, and control information to the terminal apparatus. The control information includes parameters regarding the first demodulation reference signal and parameters regarding the second demodulation reference signal. The parameters regarding the first demodulation reference signal include an antenna port number. The parameters regarding the second demodulation reference signal include an antenna port number, and a time domain density or a frequency domain density with which demodulation reference signals are mapped into a slot. The first demodulation reference signal is mapped before the second demodulation reference signal in the slot.

Claims (43)

1 . A base station apparatus for communicating with a terminal apparatus, the base station apparatus comprising:

a downlink reference signal generation unit configured to generate a first demodulation reference signal and a second demodulation reference signal that are reference signals used to demodulate a data signal; and

a radio transmitting unit configured to transmit the first demodulation reference signal, the second demodulation reference signal, and control information to the terminal apparatus, wherein

the control information includes parameters regarding the first demodulation reference signal and parameters regarding the second demodulation reference signal,

the parameters regarding the first demodulation reference signal include an antenna port number,

the parameters regarding the second demodulation reference signal include an antenna port number, and a time domain density or a frequency domain density with which demodulation reference signals are mapped into a slot, and

the first demodulation reference signal is mapped before the second demodulation reference signal in the slot.

2 . The base station apparatus according to claim 1 ,

wherein a spatial multiplexing order supported for the first demodulation reference signal is lower than a spatial multiplexing order supported for the second demodulation reference signal.

3 . The base station apparatus according to claim 1 ,

wherein the first demodulation reference signal is mapped in a fixed mapping pattern for each carrier frequency range.

4 . The base station apparatus according to claim 3 ,

wherein the first demodulation reference signal is mapped to all subcarriers of the slot in one of the carrier frequency ranges.

5 . The base station apparatus according to claim 1 ,

wherein the frequency domain density for the first demodulation reference signal is higher than the frequency domain density for the second demodulation reference signal, and the time-domain density for the first demodulation reference signal is lower than the time domain density for the second demodulation reference signal.

6 . A terminal apparatus for communicating with a base station apparatus, the terminal apparatus comprising:

a radio receiving unit configured to receive, from the base station apparatus, a first demodulation reference signal and a second demodulation reference signal that are reference signals used to demodulate a data signal, the data signal, and control information; and

a signal detection unit configured to demodulate the data signal by using the first demodulation reference signal and the second demodulation reference signal, wherein

the control information includes parameters regarding the first demodulation reference signal and parameters regarding the second demodulation reference signal,

the parameters regarding the first demodulation reference signal include an antenna port number,

the parameters regarding the second demodulation reference signal include an antenna port number, and a time domain density or a frequency domain density with which demodulation reference signals are mapped into a slot, and

the first demodulation reference signal is mapped before the second demodulation reference signal in the slot.

7 . The terminal apparatus according to claim 6 ,

wherein a spatial multiplexing order supported for the first demodulation reference signal is lower than a spatial multiplexing order supported for the second demodulation reference signal.

8 . The terminal apparatus according to claim 6 ,

wherein the first demodulation reference signal is mapped in a fixed mapping pattern for each carrier frequency range.

9 . The terminal apparatus according to claim 8 , wherein the first demodulation reference signal is mapped to all subcarriers of the slot in one of the carrier frequency ranges.

10 . The terminal apparatus according to claim 6 ,

wherein the frequency domain density for the first demodulation reference signal is higher than the frequency domain density for the second demodulation reference signal, and the time domain density for the first demodulation reference signal is lower than the time domain density for the second demodulation reference signal.

11 . A communication method in a base station apparatus for communicating with a terminal apparatus, the communication method comprising:

a downlink reference signal generation step of generating a first demodulation reference signal and a second demodulation reference signal that are reference signals used to demodulate a data signal; and

a radio transmission step of transmitting the first demodulation reference signal, the second demodulation reference signal, and control information to the terminal apparatus, wherein

the control information includes parameters regarding the first demodulation reference signal and parameters regarding the second demodulation reference signal,

the parameters regarding the first demodulation reference signal include an antenna port number,

the parameters regarding the second demodulation reference signal include an antenna port number, and a time domain density or a frequency domain density with which demodulation reference signals are mapped into a slot, and

the first demodulation reference signal is mapped before the second demodulation reference signal in the slot.

12 . A communication method in a terminal apparatus for communicating with a base station apparatus, the communication method comprising:

a radio receiving step of receiving, from the base station apparatus, a first demodulation reference signal and a second demodulation reference signal that are reference signals used to demodulate a data signal, the data signal, and control information; and

a signal detection step of demodulating the data signal by using the first demodulation reference signal and the second demodulation reference signal, wherein

the control information includes parameters regarding the first demodulation reference signal and parameters regarding the second demodulation reference signal,

the parameters regarding the first demodulation reference signal include an antenna port number,

the parameters regarding the second demodulation reference signal include an antenna port number, and a time domain density or a frequency domain density with which demodulation reference signals are mapped into a slot, and

the first demodulation reference signal is mapped before the second demodulation reference signal in the slot.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 27, 2019
From: YAMADA, RYOTA; TOMEBA, HIROMICHI
To: SHARP KABUSHIKI KAISHA; FG INNOVATION COMPANY LIMITED
Reel/Frame 050509/0244 →