DEVICE

• US 20170325238A1
• Filed: 10/01/2015
• Published: 11/09/2017
• Est. Priority Date: 12/25/2014
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: YOSHIZAWA, ATSUSHI
• Granted Patent: US 10,477,555 B2
• Time in Patent Office: Days
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04J 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

[Object] To enable a terminal device to ascertain a layer allocated to the terminal device when non-orthogonal multiplexing using a codebook is used. [Solution] Provided is a device including: an acquisition unit configured to acquire information indicating a layer allocated to a terminal device among a plurality of layers that are subject to non-orthogonal multiplexing using a codebook; and a reporting unit configured to report the layer to the terminal device.

Claims

1. A device comprising:

an acquisition unit configured to acquire information indicating a layer allocated to a terminal device among a plurality of layers that are subject to non-orthogonal multiplexing using a codebook; and

a reporting unit configured to report the layer to the terminal device.

2. The device according to claim 1, wherein the reporting unit reports the layer included in downlink control information to the terminal device.

3. The device according to claim 2, wherein the reporting unit reports a radio resource to be used in transmission of a codeword of the layer included in the downlink control information to the terminal device.

4. The device according to claim 1, further comprising:

a selection unit configured to select a codebook group corresponding to the plurality of layers among a plurality of codebook groups; and

a communication processing unit configured to perform a communication process for the plurality of layers on the basis of the codebook group.

5. The device according to claim 4, wherein the plurality of codebook groups at least include a first codebook group corresponding to a first number of layers and a second codebook group corresponding to a second number of layers that is smaller than the first number.

6. The device according to claim 5,

wherein the first number of layers is an acceptable maximum number of layers, and

the second number of layers is a smaller number of layers than the acceptable maximum number.

7. The device according to claim 5, wherein at least one codebook included in the second codebook group, as well as any codebook included in the first codebook group, includes a codeword including signal elements with different modulation orders.

8. The device according to claim 7,

wherein the at least one codebook included in the second codebook group includes a codeword including a signal element with a higher modulation order than a signal element of any codebook included in the first codebook group, and

the signal element with the higher modulation order is a signal element that is mapped to a radio resource to which signal elements of a smaller number of layers are mapped.

9. The device according to claim 5, wherein the second codebook group at least includes a signal element with a first modulation order and a signal element with a second modulation order that is different from the first modulation order.

10. The device according to claim 5, wherein at least one codebook included in the second codebook group includes a greater number of codewords than any codebook included in the first codebook group.

11. The device according to claim 4, wherein the communication process is a transmission process for the plurality of layers.

12. The device according to claim 11, wherein the transmission process includes generation of a codeword of a layer from data of the layer for each of the plurality of layers.

13. The device according to claim 4, wherein the communication process is a reception process for the plurality of layers.

14. The device according to claim 4, wherein the reporting unit reports the codebook group, or the plurality of layers or the number of layers of the plurality of layers to the terminal device.

15. The device according to claim 1, further comprising:

an allocation unit configured to allocate each of the plurality of layers to a terminal device,

wherein the allocation unit changes the number of layers of the plurality of layers that are subject to the non-orthogonal multiplexing in accordance with a change of traffic.

16. A method performed by a processor, the method comprising:

acquiring information indicating a layer allocated to a terminal device among a plurality of layers that are subject to non-orthogonal multiplexing using a codebook; and

reporting the layer to the terminal device.

17. A device comprising:

an acquisition unit configured to acquire information indicating a layer allocated to a terminal device among a plurality of layers that are subject to non-orthogonal multiplexing using a codebook; and

a communication processing unit configured to perform a communication process for the layer on the basis of the information indicating the layer.

18. The device according to claim 17, wherein the communication process is a reception process for the layer.

19. The device according to claim 17, wherein the communication process is a transmission process for the layer.

20. The device according to claim 17, wherein the communication processing unit performs the communication process for the layer on the basis of a codebook group corresponding to the plurality of layers among a plurality of codebook groups.