Method and apparatus for performing mini-subframe based alignment for new radio access technology in wireless communication system

• US 10,644,818 B2
• Filed: 07/12/2017
• Issued: 05/05/2020
• Est. Priority Date: 07/12/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Yunjung, Kim, Byounghoon
• Primary Examiner(s): Ho, Chuong T
• Application Number:
  US16/067,558
• Publication Number:
  US 20190007152A1
• Time in Patent Office: 1,028 Days
• Field of Search: 370329, 370330, 370335, 370336, 370337
• CPC Class Codes: H04J 3/1605 Fixed allocated frame structures
• 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 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0028 Variable division signaling therefor H04L5/0092
• 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 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

Abstract

A method and apparatus for multiplexing different numerologies in a wireless communication system is provided. A network node divides a scheduling unit into a plurality of basic time resource units in time domain, and multiplexes multiple numerologies by unit of a basic time resource unit. The basic time resource unit for the multiple numerologies may be aligned with each other at a basic time resource unit level or a subframe level.

Claims

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

scheduling data related to different subcarrier spacings in a subframe by a time resource unit; and

communicating the data related to the different subcarrier spacings in the subframe,

wherein a number of symbols in the time resource unit for each of the different subcarrier spacings linearly increases by a scaling factor as a subcarrier spacing for the time resource unit linearly increases by the scaling factor, and

wherein a length of the time resource unit is maintained for the different subcarrier spacings.

2. The method of claim 1, wherein the subframe comprises at least one of a transmission time interval (TTI) or a slot.

3. The method of claim 1, wherein the data comprises at least one of a physical broadcast channel (PBCH), a system information block (SIB), or a random access response (RAR).

4. The method of claim 1, wherein the different subcarrier spacings include a reference numerology.

5. The method of claim 4, wherein the reference numerology is configured per carrier.

6. The method of claim 4, wherein the reference numerology is a numerology used for delivery of at least one of physical broadcast channel (PBCH) or system information.

7. The method of claim 1, wherein the time resource unit is configured per numerology.

8. The method of claim 1, wherein a size of the time resource unit includes at least 2 orthogonal frequency division multiplexing (OFDM) symbols.

9. The method of claim 1, wherein the different subcarrier spacings are related to multiple types of services.

10. The method of claim 1, wherein a cross-carrier scheduling between the different subcarrier spacings is configured.

11. The method of claim 10, wherein a timing or a configuration follows a subframe definition of a scheduling carrier in the cross-carrier scheduling or a subframe definition of a scheduled carrier in the cross-carrier scheduling.

12. The method of claim 1, wherein a resource unit for each of the different subcarrier spacings consists of the same number of subcarriers and orthogonal frequency division multiplexing (OFDM) symbols regardless of the different subcarrier spacings.

13. The method of claim 1, wherein a resource unit for each of the different subcarrier spacings occupy the same time and frequency region.

14. The method of claim 1, wherein different demodulation reference signal (DM-RS) pattern is used depending on resource unit definition.

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

a memory;

a transceiver; and

at least one processor, coupled to the memory and the transceiver, configured to;

schedule data related to different subcarrier spacings in a subframe by a time resource unit, and

control the transceiver to communicate the data related to the different subcarrier spacings in the subframe,

wherein a number of symbols in the time resource unit for each of the different subcarrier spacings linearly increases by a scaling factor as a subcarrier spacing for the time resource unit linearly increases by the scaling factor, and

wherein a length of the time resource unit is maintained for the different subcarrier spacings.