TERMINAL APPARATUS, BASE STATION, METHOD AND RECORDING MEDIUM

• US 20190312705A1
• Filed: 06/16/2017
• Published: 10/10/2019
• Est. Priority Date: 07/29/2016
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Takano, Hiroaki
• Granted Patent: US 11,088,803 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/06 at the transmitting station
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/08 at the receiving station
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams

Abstract

[Object] To provide the uplink reference signal for beam tracking.

[Solution] A terminal apparatus, including: a communication unit configured to perform communication with a base station configured to form beams and perform communication; and a control unit configured to transmit a first uplink reference signal and a second uplink reference signal which has a narrower target frequency bandwidth and a shorter transmission period than the first uplink reference signal.

Claims

1. A terminal apparatus, comprising:

a communication unit configured to perform communication with a base station configured to form beams and perform communication; and

a control unit configured to transmit a first uplink reference signal and a second uplink reference signal which has a narrower target frequency bandwidth and a shorter transmission period than the first uplink reference signal.

2. The terminal apparatus according to claim 1, wherein a plurality of the second uplink reference signals are periodically transmitted at a same frequency position.

3. The terminal apparatus according to claim 2, wherein the second uplink reference signals are transmitted at intervals of 5 milliseconds to 10 milliseconds.

4. The terminal apparatus according to claim 1, wherein the second uplink reference signal is used for beam tracking by the base station.

5. The terminal apparatus according to claim 1, wherein the first uplink reference signal uses an entire frequency bandwidth in which the communication with the base station is able to be performed as a target bandwidth, and the second uplink reference signal uses a pan of the frequency bandwidth in which the communication with the base station is able to be performed as a target bandwidth.

6. The terminal apparatus according to claim 1, wherein the control unit performs a transmission setting for the second uplink reference signal on a basis of first setting information received from the base station.

7. The terminal apparatus according to claim 1, wherein the control unit performs a transmission setting for the second uplink reference signal on a basis of a downlink reference signal received from the base station.

8. The terminal apparatus according to claim 1, wherein the control unit transmits the second uplink reference signal while performing frequency hopping on the second uplink reference signal in the target frequency bandwidth.

9. The terminal apparatus according to claim 8, wherein the control unit transmits second setting information related to the frequency hopping to the base station.

10. The terminal apparatus according to claim 8, wherein the control unit multiplexes each of a plurality of the second uplink reference signals using different frequency hopping patterns.

11. A base station, comprising:

a communication unit configured to form beams and perform communication with a terminal apparatus; and

a control unit configured to perform reception of a first uplink reference signal and a second uplink reference signal which has a narrower target frequency bandwidth and a shorter transmission period than the first uplink reference signal from the terminal apparatus and transmission of first setting information for the second uplink reference signal to the terminal apparatus.

12. The base station according to claim 11, wherein the control unit transmits the first setting information corresponding to a reception result of the first uplink reference signal.

13. The base station according to claim 12, wherein the first setting information includes information indicating a frequency position of a frequency bandwidth serving as a target bandwidth of the second uplink reference signal.

14. The base station according to claim 13, wherein the control unit sets the frequency position of the frequency bandwidth serving as the target bandwidth of the second uplink reference signal on a basis of a reception result of the first uplink reference signal.

15. The base station according to claim 12, wherein the first setting information includes information indicating a transmission period of the second uplink reference signal.

16. The base station according to claim 12, wherein the control unit sets a plurality of different frequency hopping patterns used for transmission of the second uplink reference signal.

17. A method, comprising:

performing communication with a base station configured to form beams and perform communication; and

transmitting, by a processor, a first uplink reference signal and a second uplink reference signal which has a narrower target frequency bandwidth and a shorter transmission period than the first uplink reference signal.

18. A method, comprising:

forming beams and performing communication with a terminal apparatus; and

performing, by a processor, reception of a first uplink reference signal and a second uplink reference signal which has a narrower target frequency bandwidth and a shorter transmission period than the first uplink reference signal from the terminal apparatus and transmission of first setting information for the second uplink reference signal to the terminal apparatus.

19. A recording medium having a program recorded thereon, the program causing a computer to function as:

a communication unit configured to perform communication with a base station configured to form beams and perform communication; and

a control unit configured to transmit a first uplink reference signal and a second uplink reference signal which has a narrower target frequency bandwidth and a shorter transmission period than the first uplink reference signal.

20. A recording medium having a program recorded thereon, the program causing a computer to function as:

a communication unit configured to form beams and perform communication with a terminal apparatus; and

a control unit configured to perform reception of a first uplink reference signal and a second uplink reference signal which has a narrower target frequency bandwidth and a shorter transmission period than the first uplink reference signal from the terminal apparatus and transmission of first setting information for the second uplink reference signal to the terminal apparatus.