APPARATUS AND METHOD

• US 20170366981A1
• Filed: 11/17/2015
• Published: 12/21/2017
• Est. Priority Date: 01/29/2015
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: TAKANO, Hiroaki
• Granted Patent: US 11,153,767 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0469 taking special antenna structures, e.g. cross polarized antennas into account
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0479 for multi-dimensional arrays, e.g. horizontal or vertical pre-distortion matrix index [PMI]
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

[Object] To enable more appropriate recognition of an interference situation of a directional beam.

[Solution] Provided is an apparatus including: an acquisition unit that acquires a weight set for forming a directional beam; and a control unit that multiplies a reference signal for channel quality measurement by the weight set. The weight set is a weight set that is able to be generated from a first weight set for acquiring directivity in a first direction, a second weight set for acquiring directivity in a second direction, and a third weight set for phase adjustment of dual layer multiple-input multiple-output (MIMO). The third weight set is a specific one of a plurality of weight sets for phase adjustment of dual layer MIMO.

Claims

1. :

An apparatus comprising;

an acquisition unit that acquires a weight set for forming a directional beam; and

a control unit that multiplies a reference signal for channel quality measurement by the weight set,

wherein the weight set is a weight set that is able to be generated from a first weight set for acquiring directivity in a first direction, a second weight set for acquiring directivity in a second direction, and a third weight set for phase adjustment of dual layer multiple-input multiple-output (MIMO), and

the third weight set is a specific one of a plurality of weight sets for phase adjustment of dual layer MIMO.

2. :

The apparatus according to claim 1,

wherein the first direction and the second direction are orthogonal to each other.

3. :

The apparatus according to claim 2,

wherein the first direction is a horizontal direction, and

the second direction is a vertical direction.

4. :

The apparatus according to claim 1,

wherein the reference signal is a channel state information reference signal (CSI-RS).

5. :

The apparatus according to claim 1,

wherein the control unit notifies a terminal apparatus of a configuration of the reference signal.

6. :

The apparatus according to claim 1,

wherein the control unit notifies a neighbor base station of the configuration of the reference signal.

7. :

The apparatus according to claim 5,

wherein the configuration includes at least one of a radio resource used to transmit the reference signal and a sequence of the reference signal.

8. :

The apparatus according to claim 1,

wherein the acquisition unit acquires two or more weight sets for forming two or more directional beams,

the control unit respectively multiplies two or more reference signals for channel quality measurement by the two or more weight sets,

each of the two or more weight sets is a weight set that is able to be generated from the first weight set for acquiring directivity in the first direction, the second weight set for acquiring directivity in the second direction, and the third weight set for phase adjustment of dual layer MIMO, and

the third weight set is the specific one of the plurality of weight sets.

9. :

The apparatus according to claim 8,

wherein the two or more reference signals have different configurations from each other.

10. (canceled)

11. :

An apparatus comprising;

an acquisition unit that acquires information indicating a configuration of a reference signal for channel quality measurement to be multiplied by a weight set for forming a directional beam; and

a control unit that calculates an amount of interference of the directional beam from the reference signal multiplied by the weight set,

wherein the weight set is a weight set that is able to be generated from a first weight set for acquiring directivity in a first direction, a second weight set for acquiring directivity in a second direction, and a third weight set for phase adjustment of dual layer MIMO, and

the third weight set is a specific one of a plurality of weight sets for phase adjustment of dual layer MIMO.

12. :

The apparatus according to claim 11,

wherein the control unit estimates a channel from the reference signal and calculates the amount of interference on the basis of the channel and the plurality of weight sets.

13. :

The apparatus according to claim 11,

wherein the acquisition unit acquires information indicating a configuration of each of two or more reference signals for channel quality measurement that are respectively multiplied by two or more weight sets for forming two or more directional beams,

the control unit calculates an amount of interference of each of the two or more directional beams from the two or more reference signals that are respectively multiplied by the two or more weight sets,

each of the two or more weight sets is a weight set that is able to be generated from a first weight set for acquiring directivity in a first direction, a second weight set for acquiring directivity in a second direction, and a third weight set for phase adjustment of dual layer MIMO, and

the third weight set is the specific one of the plurality of weight sets.

14. :

An apparatus comprising;

an acquisition unit that acquires measurement restriction information indicating restriction on measurement of a reference signal for channel quality measurement transmitted over a directional beam; and

a control unit that notifies a terminal apparatus of the measurement restriction information.

15. :

The apparatus according to claim 14,

wherein the measurement restriction information includes information indicating the number of directional beams which are measurement targets.

16. :

The apparatus according to claim 14,

wherein the measurement restriction information includes information about a lower limit of power of a directional beam which is a measurement target.

17. :

The apparatus according to claim 14,

wherein the measurement restriction information includes information indicating priorities of base stations or directional beams which are measurement targets.

18. :

The apparatus according to claim 14,

wherein the control unit notifies the terminal apparatus of the measurement restriction information in system information or through individual signaling to the terminal apparatus.

19-20. -20. (canceled)