TECHNIQUE FOR HARQ, MULTIPLEXING, AND CONTENTION

• US 20180249496A1
• Filed: 09/05/2017
• Published: 08/30/2018
• Est. Priority Date: 02/27/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: RADULESCU, Andrei Dragos, PATEL, Chirag, CHENDAMARAI KANNAN, Arumugam, KADOUS, Tamer, LUO, Tao, SUN, Jing
• Granted Patent: US 10,681,723 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for wireless communication are provided. The apparatus may be a base station. The apparatus may transmit an uplink grant to a UE during a first transmit opportunity. The apparatus may signal, during a second transmit opportunity, a grant trigger to the UE to trigger operations associated with the uplink grant that are uncompleted after the first transmit opportunity. The grant trigger may be associated with a set of UEs that includes the UE. The set of UEs may be a subset of the UEs having pending transmissions. The apparatus may instruct the UE regarding whether to keep or discard resources granted by the uplink grant when the UE switches to a different beam during or prior to the second transmit opportunity.

Claims

1. A method of wireless communication of a base station, comprising:

transmitting an uplink grant to a user equipment (UE) during a first transmit opportunity; and

signaling, during a second transmit opportunity, a grant trigger to the UE to trigger operations associated with the uplink grant that are uncompleted after the first transmit opportunity, the grant trigger associated with a set of UEs comprising the UE, the set of UEs being a subset of UEs having pending transmissions.

2. The method of claim 1, wherein the second transmit opportunity follows the first transmit opportunity.

3. The method of claim 1, wherein the grant trigger includes an identifier of a beam used by the UE, and wherein the identifier of the beam indicates that the grant trigger is associated with the set of UEs.

4. The method of claim 1, wherein the grant trigger includes a bitmap or a grouping that maps to the set of UEs, wherein the set of UEs has common spatial characteristics and includes the UE.

5. The method of claim 1, wherein the grant trigger is transmitted via a new radio common physical downlink control channel (NR-CPDCCH).

6. The method of claim 1, further comprising:

instructing the UE regarding whether to keep or discard resources granted by the uplink grant when the UE switches to a different beam during or prior to the second transmit opportunity.

7. An apparatus for wireless communication of a base station, comprising:

a memory; and

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

transmit an uplink grant to a user equipment (UE) during a first transmit opportunity; and

signal, during a second transmit opportunity, a grant trigger to the UE to trigger operations associated with the uplink grant that are uncompleted after the first transmit opportunity, the grant trigger associated with a set of UEs comprising the UE, the set of UEs being a subset of UEs having pending transmissions.

8. The apparatus of claim 7, wherein the at least one processor is further configured to:

instruct the UE regarding whether to keep or discard resources granted by the uplink grant when the UE switches to a different beam during or prior to the second transmit opportunity.

9. A method of wireless communication of a user equipment (UE), comprising:

receiving an uplink grant from a base station during a first transmit opportunity;

receiving a grant trigger from the base station during a second transmit opportunity, the grant trigger associated with a set of UEs; and

performing operations associated with the uplink grant that are uncompleted after the first transmit opportunity when the set of UEs includes the UE.

10. The method of claim 9, wherein the second transmit opportunity follows the first transmit opportunity.

11. The method of claim 9, wherein the set of UEs includes the UE when the grant trigger includes an identifier of a beam used by the UE.

12. The method of claim 9, wherein the set of UEs includes the UE when the grant trigger includes a bitmap or a grouping that maps to the UE, wherein the set of UEs has common spatial characteristics.

13. The method of claim 9, wherein the grant trigger is received via a new radio common physical downlink control channel (NR-CPDCCH).

14. The method of claim 9, further comprising:

receiving, from the base station, a signal regarding whether to keep or discard resources granted by the uplink grant when the UE changes spatial dimension prior to or during the second transmit opportunity.

15. An apparatus for wireless communication of a user equipment (UE) comprising:

a memory; and

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

receive an uplink grant from a base station during a first transmit opportunity;

receive a grant trigger from the base station during a second transmit opportunity, the grant trigger associated with a set of UEs; and

perform operations associated with the uplink grant that are uncompleted after the first transmit opportunity when the set of UEs includes the UE.

16. The apparatus of claim 15, wherein the at least one processor is further configured to:

receive, from the base station, a signal regarding whether to keep or discard resources granted by the uplink grant when the UE changes spatial dimension prior to or during the second transmit opportunity.

17. A method of wireless communication of a base station, comprising:

simultaneously scheduling a first user equipment (UE) in a first beam and a second UE in a second beam;

receiving, from the first UE, a first channel reservation response for a first set of resources in the first beam during a first transmit opportunity; and

receiving, from the second UE, a second channel reservation response for a second set of resources in the second beam during a second transmit opportunity.

18. The method of claim 17, wherein the second channel reservation response is received at the second transmit opportunity.

19. The method of claim 17, wherein the second channel reservation response is received at the first transmit opportunity.

20. The method of claim 17, further comprising:

transmitting, to the first UE, a first data using the first set of resources in the first beam during the first transmit opportunity; and

transmitting, to the second UE, a second data using the second set of resources in the second beam during the second transmit opportunity.

21. The method of claim 20, further comprising:

receiving a first uplink control channel in the first beam from the first UE; and

receiving a second uplink control channel in the second beam from the second UE, wherein the first uplink control channel and the second uplink control channel are multiplexed on a same transmission interval during the second transmit opportunity.

22. The method of claim 21, wherein the second set of resources is preceded by the second uplink control channel.

23. The method of claim 17, wherein the second transmit opportunity follows the first transmit opportunity.

24. The method of claim 17, wherein the scheduling is performed using a third beam addressing both the first UE and the second UE.

25. The method of claim 17, wherein the scheduling is simultaneously performed in the first beam for the first UE and in the second beam for the second UE.

26. An apparatus for wireless communication of a base station, comprising:

a memory; and

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

simultaneously schedule a first user equipment (UE) in a first beam and a second UE in a second beam;

receive, from the first UE, a first channel reservation response for a first set of resources in the first beam during a first transmit opportunity; and

receive, from the second UE, a second channel reservation response for a second set of resources in the second beam during a second transmit opportunity.

27. The apparatus of claim 26, wherein the at least one processor is further configured to:

transmit, to the first UE, a first data using the first set of resources in the first beam during the first transmit opportunity; and

transmit, to the second UE, a second data using the second set of resources in the second beam during the second transmit opportunity.

28. The apparatus of claim 27, wherein the at least one processor is further configured to:

receive a first uplink control channel in the first beam from the first UE; and

receive a second uplink control channel in the second beam from the second UE, wherein the first uplink control channel and the second uplink control channel are multiplexed on a same transmission interval during the second transmit opportunity.