SCALABLE NUMEROLOGY WITH SYMBOL BOUNDARY ALIGNMENT FOR UNIFORM AND NON-UNIFORM SYMBOL DURATION IN WIRELESS COMMUNICATION

• US 20170325250A1
• Filed: 03/14/2017
• Published: 11/09/2017
• Est. Priority Date: 05/09/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Manolakos, Alexandros, Jiang, Jing, Soriaga, Joseph Binamira, Mukkavilli, Krishna Kiran, Ang, Peter Pui Lok, Ji, Tingfang, Gaal, Peter
• Granted Patent: US 10,356,800 B2
• Time in Patent Office: Days
• 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: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

Aspects of the present disclosure provide various wireless communication numerology designs that can maintain symbol boundary alignment while multiplexing different numerologies in wireless communication. The symbols may be scaled for different tone or subcarrier spacings while maintaining the symbol boundary alignment between different numerologies. Maintaining the symbol-boundary alignment between different numerologies enables symbol-level numerology multiplexing. The disclosed numerology designs enable low latency communication and improved interference management, and provide non-ambiguous symbol boundary timing reference for multiplexing different numerologies.

Claims

1. A method of wireless communication at a scheduling entity, comprising:

establishing communication with a first user equipment (UE) utilizing a first numerology;

establishing communication with a second UE utilizing a second numerology, the second numerology being scaled from the first numerology such that a subcarrier spacing of the second numerology is a positive integer multiple of the first numerology; and

communicating with the first UE and the second UE utilizing a slot comprising the first numerology and second numerology such that a symbol length of each symbol of the first numerology is equal to a sum of symbol lengths of two or more corresponding symbols of the second numerology.

2. The method of claim 1, wherein symbol boundaries of each symbol of the first numerology are aligned with symbol boundaries of two or more corresponding symbols of the second numerology.

3. The method of claim 1, wherein a symbol of the first numerology or second numerology has a symbol length different from a symbol length of other symbols of the same numerology.

4. The method of claim 3, wherein the other symbols have a uniform length.

5. The method of claim 1, wherein two or more symbols of the first numerology or second numerology have a same symbol length that is different from a symbol length of other symbols of the same numerology.

6. The method of claim 5, wherein the other symbols have a uniform length.

7. The method of claim 5, wherein the two or more symbols are located at a beginning or an end of the slot.

8. The method of claim 1, wherein one or more symbols of the first numerology or second numerology have a symbol length longer than a symbol length of other symbols of the same numerology.

9. The method of claim 1, wherein the first numerology or second numerology comprises two or more different cyclic prefix durations.

10. The method of claim 1, wherein a cyclic prefix duration difference between symbols of the first numerology is the same as a cyclic prefix duration difference between symbols of the second numerology.

11. The method of claim 1, further comprising:

multiplexing the first numerology and second numerology by time division multiplexing or frequency division multiplexing.

12. A method of wireless communication at a scheduling entity, comprising:

establishing communication with a first user equipment (UE) utilizing a first numerology;

establishing communication with a second UE utilizing a second numerology, the second numerology being scaled from the first numerology such that a subcarrier spacing of the second numerology is a positive integer multiple of the first numerology; and

communicating with one or more wireless devices utilizing a slot comprising the first numerology and second numerology,

wherein the slot comprises an uplink (UL) portion, a downlink (DL) portion, and a guard period (GP) between the UL portion and DL portion such that the GP absorbs a symbol length mismatch between the first numerology and second numerology.

13. The method of claim 12, wherein symbol boundaries of the UL portion or DL portion are not aligned with symbol boundaries of the first numerology or second numerology.

14. The method of claim 12, wherein the GP has a duration equal to a difference in symbol length between a first symbol and a second symbol of the first numerology or second numerology.

15. The method of claim 12, wherein a cyclic prefix duration difference between symbols of the first numerology is the same as a cyclic prefix duration difference between symbols of the second numerology.

16. A scheduling entity for wireless communication, comprising:

a communication interface configured for wireless communication utilizing a first numerology and a second numerology;

a memory stored with executable code; and

a processor operatively coupled with the communication interface and the memory,

wherein the processor is configured by the executable code to;

establish communication with a first user equipment (UE) utilizing the first numerology;

establish communication with a second UE utilizing the second numerology, the second numerology being scaled from the first numerology such that a subcarrier spacing of the second numerology is a positive integer multiple of the first numerology; and

communicate with the first UE and the second UE utilizing a slot comprising the first numerology and second numerology such that a symbol length of each symbol of the first numerology is equal to a sum of symbol lengths of two or more corresponding symbols of the second numerology.

17. The scheduling entity of claim 16, wherein symbol boundaries of each symbol of the first numerology are aligned with symbol boundaries of two or more corresponding symbols of the second numerology.

18. The scheduling entity of claim 16, wherein a symbol of the first numerology or second numerology has a symbol length different from a symbol length of other symbols of the same numerology.

19. The scheduling entity of claim 18, wherein the other symbols have a uniform length.

20. The scheduling entity of claim 16, wherein two or more symbols of the first numerology or second numerology have a same symbol length that is different from a symbol length of other symbols of the same numerology.

21. The scheduling entity of claim 20, wherein the other symbols have a uniform length.

22. The scheduling entity of claim 20, wherein the two or more symbols are located at a beginning or an end of the slot.

23. The scheduling entity of claim 16, wherein one or more symbols of the first numerology or second numerology have a symbol length longer than a symbol length of other symbols of the same numerology.

24. The scheduling entity of claim 16, wherein the first numerology or second numerology comprises two or more different cyclic prefix durations.

25. The scheduling entity of claim 16, wherein a cyclic prefix duration difference between symbols of the first numerology is the same as a cyclic prefix duration difference between symbols of the second numerology.

26. The scheduling entity of claim 16, wherein the processor is further configured to:

multiplex the first numerology and second numerology by time division multiplexing or frequency division multiplexing.

27. A scheduling entity for wireless communication, comprising:

a communication interface configured for wireless communication utilizing a first numerology and a second numerology;

a memory stored with executable code; and

a processor operatively coupled with the communication interface and the memory,

wherein the processor is configured by the executable code to;

establish communication with a first user equipment (UE) utilizing the first numerology;

establish communication with a second UE utilizing the second numerology, the second numerology being scaled from the first numerology such that a subcarrier spacing of the second numerology is a positive integer multiple of the first numerology; and

communicate with one or more wireless devices utilizing a slot comprising the first numerology and second numerology,

wherein the slot comprises an uplink (UL) portion, a downlink (DL) portion, and a guard period (GP) between the UL portion and DL portion such that the GP absorbs a symbol length mismatch between the first numerology and second numerology.

28. The scheduling entity of claim 27, wherein symbol boundaries of the UL portion or DL portion are not aligned with symbol boundaries of the first numerology or second numerology.

29. The scheduling entity of claim 27, wherein the GP has a duration equal to a difference in symbol length between a first symbol and a second symbol of the first numerology or second numerology.

30. The scheduling entity of claim 27, wherein a cyclic prefix duration difference between symbols of the first numerology is the same as a cyclic prefix duration difference between symbols of the second numerology.