METHOD AND APPARATUS FOR CONFIGURING FRAME STRUCTURE FOR NEW RADIO ACCESS TECHNOLOGY IN WIRELESS COMMUNICATION SYSTEM

• US 20190075006A1
• Filed: 05/22/2017
• Published: 03/07/2019
• Est. Priority Date: 05/22/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Yunjung, Kim, Kijun, Kim, Byounghoon
• Granted Patent: US 10,574,502 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/2646 using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
• CPC Class Codes: H04L 27/2666 Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

For supporting a new radio access technology (new RAT, or NR), a frame structure for the new RAT may be configured. A network node configures a frame in which a first cyclic prefix (CP) is allocated to a first symbol in every 0.5 ms and a second CP is allocated to remaining symbols in every 0.5 ms. In this case, a length of the first CP is longer than a length of the second CP.

Claims

1. A method for configuring a frame by a network node in a wireless communication system, the method comprising:

configuring a frame in which a first cyclic prefix (CP) is allocated to a first symbol in every 0.5 ms and a second CP is allocated to remaining symbols in every 0.5 ms; and

communicating with a user equipment (UE) by using the frame,

wherein a length of the first CP is longer than a length of the second CP.

2. The method of claim 1, wherein the length of the first CP and the length of the second CP, in terms of sampling time, depends on a subcarrier spacing.

3. The method of claim 1, wherein the frame is a first time duration with a first subcarrier spacing, and

wherein the first subcarrier spacing is a reference subcarrier spacing.

4. The method of claim 3, wherein the first time duration consists of 7 orthogonal frequency division multiplexing (OFDM) symbols based on the reference subcarrier spacing.

5. The method of claim 3, further comprising configuring a second time duration with a second subcarrier spacing,

wherein the second subcarrier spacing is power of 2 for the first subcarrier spacing.

6. The method of claim 5, wherein the first time duration and the second time duration are aligned with each other at OFDM symbol level.

7. The method of claim 5, wherein the first time duration and the second time duration are aligned with each other at slot level.

8. The method of claim 5, wherein the first time duration and the second time duration are aligned with each other at subframe level.

9. A network node in a wireless communication system, the network node comprising:

a memory;

a transceiver; and

a processor, coupled to the memory and the transceiver, that;

configures a frame in which a first cyclic prefix (CP) is allocated to a first symbol in every 0.5 ms and a second CP is allocated to remaining symbols in every 0.5 ms, and

controls the transceiver to communicate with a user equipment (UE) by using the frame,

wherein a length of the first CP is longer than a length of the second CP.

10. The network node of claim 9, wherein the length of the first CP and the length of the second CP, in terms of sampling time, depends on a subcarrier spacing.

11. The network node of claim 9, wherein the frame is a first time duration with a first subcarrier spacing, and

wherein the first subcarrier spacing is a reference subcarrier spacing.

12. The network node of claim 11, wherein the first time duration consists of 7 orthogonal frequency division multiplexing (OFDM) symbols based on the reference subcarrier spacing.

13. The network node of claim 11, further comprising configuring a second time duration with a second subcarrier spacing,

wherein the second subcarrier spacing is power of 2 for the first subcarrier spacing.

14. The network node of claim 13, wherein the first time duration and the second time duration are aligned with each other at OFDM symbol level or slot level or subframe level.