Hybrid automatic repeat request buffer configuration

Patent metadata

Field	Value
Publication number	US-10230502-B2
Application number	US-201715853050-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Mar 24, 2017
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

Aspects of the present disclosure provide apparatuses, methods, and processes that can determine the number of concurrent hybrid automatic repeat request (HARQ) processes at a HARQ entity to facilitate efficient use of HARQ buffers and/or resources across different operating modes. An exemplary apparatus is configured to determine a number of HARQ processes based on a number of HARQ buffers, a maximum buffering time, and a slot duration. The apparatus maintains one or more HARQ processes at a HARQ entity up to the determined number of HAR processes and communicate with the one or more other devices utilizing the one or more HARQ processes.

First claim

What is claimed is:

1. A method of wireless communication, comprising:
determining a number of hybrid automatic repeat request (HARQ) processes based on a number of HARQ buffers, a maximum buffering time, and a time slot duration;
maintaining one or more HARQ processes at a HARQ entity up to the determined number; and
communicating with one or more devices utilizing the one or more HARQ processes.

2. The method of claim 1 , wherein the determining comprises:
determining the number of HARQ processes that avoids buffer overflow of the HARQ buffers by:
determining N, wherein N is the number of HARQ buffers;
determining T_buffer/T_slot, wherein T_buffer is the maximum buffering time and T_slot is the slot duration; and
determining the determined number of HARQ processes as a minimum of (N, T_buffer/T_slot).

3. The method of claim 2 , wherein N is a maximum number of HARQ buffers.

4. The method of claim 2 , wherein the determined number of HARQ processes comprises a maximum number of HARQ processes utilized for wireless communication with the one or more devices.

5. The method of claim 1 , wherein the determining further comprises:
determining the number of HARQ processes based on a HARQ response timing of the one or more devices.

6. The method of claim 1 , wherein the determining further comprises:
determining the number of HARQ processes based on at least one of a subcarrier spacing or a cyclic prefix overhead used by the one or more devices.

7. An apparatus comprising:
a communication interface configured for wireless communication with one or more devices;
a memory; and
a processor operatively coupled to the communication interface and memory,
wherein the processor and memory are configured to:
determine a number of hybrid automatic repeat request (HARQ) processes based on a number of HARQ buffers, a maximum buffering time, and a time slot duration;
maintain one or more HARQ processes at a HARQ entity up to the determined number; and
communicate with the one or more devices utilizing the one or more HARQ processes.

8. The apparatus of claim 6 , wherein the processor and memory are further configured to determine the number of HARQ processes that avoids buffer overflow of the HARQ buffers by:
determining N, wherein N is the number of HARQ buffers;
determining T_buffer/T_slot, wherein T_buffer is the maximum buffering time and T_slot is the slot duration; and
determining the determined number of HARQ processes as a minimum of (N, T_buffer/T_slot).

9. The apparatus of claim 8 , wherein N is a maximum number of HARQ buffers.

10. The apparatus of claim 8 , wherein the determined number of HARQ processes comprises:
a maximum number of HARQ processes utilized for wireless communication with the one or more devices.

11. The apparatus of claim 8 , wherein the processor and memory are further configured to:
determine the number of HARQ processes based on a HARQ response timing of the one or more devices.

12. The apparatus of claim 8 , wherein the processor and memory are further configured to:
determine the number of HARQ processes based on at least one of a subcarrier spacing or a cyclic prefix overhead used by the one or more devices.

13. An apparatus for wireless communication, comprising:
means for determining a number of hybrid automatic repeat request (HARQ) processes based on a number of HARQ buffers, a maximum buffering time, and a time slot duration;
means for maintaining one or more HARQ processes at a HARQ entity up to the determined number; and
means for communicating with one or more devices utilizing the one or more HARQ processes.

14. The apparatus of claim 13 , wherein the means for determining is configured to determine the number of HARQ processes that avoids buffer overflow of the HARQ buffers by:
determining N, wherein N is the number of HARQ buffers;
determining T_buffer/T_slot, wherein T_buffer is the maximum buffering time and T_slot is the slot duration; and
determining the determined number of HARQ processes as a minimum of (N, T_buffer/T_slot).

15. The apparatus of claim 14 , wherein N is a maximum number of HARQ buffers.

16. The apparatus of claim 14 , wherein the determined number of HARQ processes comprises:
a maximum number of HARQ processes utilized for wireless communication with the one or more devices.

17. The apparatus of claim 13 , wherein the means for determining further comprises:
means for determining the number of HARQ processes based on a HARQ response timing of the one or more devices.

18. The apparatus of claim 13 , wherein the means for determining further comprises:
means for determining the number of HARQ processes based on at least one of a subcarrier spacing or a cyclic prefix overhead used by the one or more devices.

19. A non-transitory computer-readable storage medium comprising computer-executable code for causing an apparatus to:
determine a determined number of hybrid automatic repeat request (HARQ) processes based on a number of HARQ buffers, a maximum buffering time, and a time slot duration;
maintain one or more HARQ processes at a HARQ entity up to the determined number; and
communicate with one or more devices utilizing the one or more HARQ processes.

20. The non-transitory computer-readable storage medium of claim 19 , further comprising computer-executable code for causing the apparatus to determine the number of HARQ processes that avoids buffer overflow of the HARQ buffers by:
determining N, wherein N is the number of HARQ buffers;
determining T_buffer/T_slot, wherein T_buffer is the maximum buffering time and T_slot is the slot duration; and
determining the determined number of HARQ processes as a minimum of (N, T_buffer/T_slot).

21. The non-transitory computer-readable storage medium of claim 20 , wherein N is a maximum number of HARQ buffers.

22. The non-transitory computer-readable storage medium of claim 20 , wherein the determined number of HARQ processes comprises:
a maximum number of HARQ processes utilized for wireless communication with the one or more devices.

23. The non-transitory computer-readable storage medium of claim 19 , further comprising computer-executable code for causing the apparatus to:
determine the number of HARQ processes based on a HARQ response timing of the one or more devices.

24. The non-transitory computer-readable storage medium of claim 19 , further comprising computer-executable code for causing the apparatus to:
determine the number of HARQ processes based on at least one of a subcarrier spacing or a cyclic prefix overhead used by the one or more devices.

Assignees

• Qualcomm Inc

Inventors

• Ji Tingfang
• Gaal Peter
• Soriaga Joseph Binamira
• Jiang Jing
• Ang Peter

Classifications

• H04L1/1887

  Scheduling and prioritising arrangements · CPC title

• H04L1/1874 Primary

  Buffer management · CPC title

• H04L1/188

  Time-out mechanisms · CPC title

• H04L1/1835

  Buffer management · CPC title

• H04L1/1825

  Adaptation of specific ARQ protocol parameters according to transmission conditions · CPC title