System and Method for Full-Duplex Operation in a Wireless Communications System

• US 20160233904A1
• Filed: 02/09/2015
• Published: 08/11/2016
• Est. Priority Date: 02/09/2015
• Status: Abandoned Application

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Shiu, Wan-Yi, Rao, Nanyuan, Wu, Huan, Hum, Eddy Shi-Ning
• Application Number:
  US14/617,679
• Publication Number:
  US 20160233904A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/1461 Suppression of signals in the return path, i.e. bidirectional control circuits
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission

Abstract

A method for transmitting a full-duplex frame includes scheduling a first flexible allocation resource of a frame as a first resource for a second device served by the first device, scheduling a second flexible allocation resource of the frame as a second resource for a third device served by the first device, and generating the frame including the flexible allocation resources and a first half-duplex training period configured to convey a first training signal, where the first half-duplex training period and the first training signal facilitate an estimation of a channel impulse response (CIR) of a communications channel between a transmit antenna of the first device and a receive antenna of the first device. The method also includes transmitting the frame, and simultaneously receiving the frame.

Claims

1. A method for operating a first device, the method comprising:

scheduling, by the first device, a first flexible allocation resource of a frame as a first resource for a second device served by the first device;

scheduling, by the first device, a second flexible allocation resource of the frame as a second resource for a third device served by the first device;

generating, by the first device, the frame including the flexible allocation resources and a first half-duplex training period configured to convey a first training signal, where the first half-duplex training period and the first training signal facilitate an estimation of a channel impulse response (CIR) of a communications channel between a transmit antenna of the first device and a receive antenna of the first device; and

transmitting and simultaneously receiving, by the first device, the frame.

2. The method of claim 1, further comprising:

estimating the CIR of the communications channel in accordance with the first training signal conveyed in the frame; and

cancelling interference in received signals in accordance with the estimated CIR.

3. The method of claim 1, wherein the first flexible allocation resource is configured as an uplink resource for the second device and the second flexible allocation resource is configured as a downlink resource for the third device.

4. The method of claim 3, wherein the first flexible allocation resource and the second flexible allocation resource are mapped to the same physical allocation resource.

5. The method of claim 1, wherein the first flexible allocation resource is configured as a downlink resource for the second device and the second flexible allocation resource is configured as an uplink resource for the third device.

6. The method of claim 1, wherein the first half-duplex training period is located in a first special subframe of the frame.

7. The method of claim 1, wherein generating the frame comprises placing the first training signal in the first half-duplex training period of a first special subframe of the frame.

8. The method of claim 1, wherein the first half-duplex training period is located in a first special subframe of the frame, and wherein the frame further comprises a second half-duplex training period in a second special subframe of the frame.

9. The method of claim 8, wherein generating the frame comprises placing the first training signal in the second half-duplex training period of the second special subframe of the frame.

10. The method of claim 8, further comprising placing a second training signal in the second half-duplex training period of the second special subframe of the frame.

11. The method of claim 1, wherein the first training period comprises a guard period and a downlink portion of a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) time division duplexed (TDD) special subframe.

12. The method of claim 1, wherein the first half-duplex training period comprises resources that are not used to signal control information and channel information in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) time division duplexed (TDD) compliant communications system.

13. The method of claim 1, wherein the first device comprises a full-duplex device.

14. The method of claim 13, wherein the first device comprises one of a full-duplex evolved NodeB and a full-duplex User Equipment.

15. A first device comprising:

a processor configured to schedule a first flexible allocation resource of a frame as a first resource for a second device served by the first device, to schedule a second flexible allocation resource of the frame as a second resource for a third device served by the first device, and to generate the frame including the flexible allocation resources and a first half-duplex training period configured to convey a first training signal, where the first half-duplex training period and the first training signal facilitate an estimation of a channel impulse response (CM) of a communications channel between a transmit antenna of the first device and a receive antenna of the first device;

a transmitter operatively coupled to the processor, the transmitter configured to transmit the frame; and

a receiver operatively coupled to the processor, the receiver configured to simultaneously receive the frame when transmitting the frame.

16. The first device of claim 15, wherein the processor is configured to place the first training signal on the first half-duplex training period in at least one of a first downlink portion and a first guard period of a first special subframe of the frame.

17. The first device of claim 15, wherein the processor is configured to place a second training signal in a second half-duplex training period of a second special subframe of the frame.

18. The first device of claim 17, wherein the processor is configured to place the half-duplex training period in at least one of a second guard period and a second downlink portion of the second special subframe of the frame.

19. The first device of claim 15, wherein the first device comprises a full-duplex device.

20. The first device of claim 19, wherein the first device comprises one of a full-duplex evolved NodeB and a full-duplex User Equipment.

21. A communications system comprising:

a plurality of user equipments; and

a full-duplex device operatively coupled to the plurality of user equipments, the full-duplex device including

a processor, and

a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to

schedule a first flexible allocation resource of a frame as a first resource for a second device served by the full-duplex device,

schedule a second flexible allocation resource of the frame as a second resource for a third device served by the full-duplex device,

generate the frame including the flexible allocation resources and a first half-duplex training period configured to convey a first training signal, where the first half-duplex training period and the first training signal facilitate an estimation of a channel impulse response (CIR) of a communications channel between a transmit antenna of the full-duplex device and a receive antenna of the full-duplex device, and

simultaneously transmit and receive the frame.

22. The communications system of claim 21, wherein the programming includes instructions to place the first training signal on the first half-duplex training period in at least one of a first downlink portion and a first guard period of a first special subframe of the frame.

23. The communications system of claim 21, wherein the programming includes instructions to place a second training signal in a second half-duplex training period of a second special subframe of the frame.

24. The communications system of claim 23, wherein the programming includes instructions to place the half-duplex training period in at least one of a second guard period and a second downlink portion of the second special subframe of the frame.