PHYSICAL UPLINK SHARED CHANNEL COVERAGE ENHANCEMENTS

• US 20180227944A1
• Filed: 01/25/2018
• Published: 08/09/2018
• Est. Priority Date: 02/04/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Yerramalli, Srinivas, Liu, Chih-Hao, Kadous, Tamer Adel
• Granted Patent: US 11,057,926 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04W 28/0215 based on user or device properties, e.g. MTC-capable devices services for machine-to-machine communication [M2M] or machine type communication [MTC] H04W4/70; wireless resource selection or allocation plan definition based on terminal or device properties H04W72/51
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive an uplink grant that conveys an indication of a multi-transmission opportunity (TxOP) grant. The UE may transmit, during a first TxOP, a first uplink transmission in one or more subframes in accordance with the multi-TxOP grant. The UE may transmit, during a second TxOP, a second uplink transmission in one or more subframes in accordance with the multi-TxOP grant.

Claims

1. A method for wireless communication, comprising:

receiving an uplink grant that conveys an indication of a multi-transmission opportunity (TxOP) grant;

transmitting, during a first TxOP, a first uplink transmission in one or more subframes in accordance with the multi-TxOP grant; and

transmitting, during a second TxOP, a second uplink transmission in one or more subframes in accordance with the multi-TxOP grant.

2. The method of claim 1, further comprising:

receiving a trigger indicator in one or both of the first and second TxOPs during a subframe that is before the subframe in which the first or second uplink transmissions are transmitted, the trigger indicator indicating that repetitive uplink transmissions are permitted to be transmitted during the first or second TxOPs.

3. The method of claim 2, wherein the trigger indication comprises at least one of an on/off indication or a sequence number for the trigger indicator using one or more bits of the trigger indicator.

4. The method of claim 3, further comprising:

monitoring a configured set of bits in a common control signaling to determine the sequence number for the trigger indicator.

5. The method of claim 3, wherein the one or more bits of the trigger indicator are based at least in part on a resource identifier indicated in a downlink control indicator (DCI).

6. The method of claim 1, further comprising:

scaling one or more transport block sizes prior to transmitting the first and second uplink transmissions, the scaling performed according to a transport block scaling factor.

7. The method of claim 1, further comprising:

transmitting a dense reference signal during a first uplink subframe of one or both of the first and second TxOPs.

8. The method of claim 1, further comprising:

identifying an interlace factor associated with the first and second uplink transmissions; and

interlacing the first and second uplink transmissions according to the interlace factor.

9. The method of claim 1, further comprising:

performing a listen-before-talk (LBT) procedure before transmitting the first and second uplink transmissions.

10. The method of claim 1, further comprising:

determining that a predetermined number of listen-before-talk (LBT) procedures associated with the first or second uplink transmissions have failed; and

discarding the multi-TxOP grant.

11. The method of claim 10, wherein:

the predetermined number of LBT procedure failures is based at least in part on a repetition indicator.

12. The method of claim 1, wherein:

the first TxOP and the second TxOP are the same, and wherein the uplink grant is received in a TxOP other than the first or second TxOPs.

13. The method of claim 1, wherein:

the first TxOP and the second TxOP are different, and wherein the uplink grant is received in the first TxOP.

14. The method of claim 1, wherein:

the first TxOP comprises a base station acquired TxOP and the second TxOP comprise a user equipment (UE) acquired TxOP.

15. The method of claim 1, wherein:

the uplink grant further conveys an indication of at least one of a repetition indicator, an associated transport block scaling factor, or a combination thereof.

16. A method for wireless communication, comprising:

transmitting an uplink grant that conveys an indication of a multi-transmission opportunity (TxOP) grant;

receiving, during a first TxOP, a first uplink transmission in one or more subframes in accordance with the multi-TxOP grant; and

receiving, during a second TxOP, a second uplink transmission in one or more subframes in accordance with the multi-TxOP grant.

17. The method of claim 16, further comprising:

transmitting a trigger indicator in at least one of the first or second TxOPs during a subframe that is before the subframe in which the first or second uplink transmissions are received, the trigger indicator indicating that repetitive uplink transmissions are permitted to be transmitted during the first or second TxOPs.

18. The method of claim 16, further comprising:

receiving a dense reference signal during a first uplink subframe of one or both of the first and second TxOPs.

19. The method of claim 16, wherein:

the first TxOP and the second TxOP are the same, and wherein the uplink grant is received in a TxOP other than the first or second TxOPs.

20. The method of claim 16, wherein:

the first TxOP and the second TxOP are different, and wherein the uplink grant is received in the first TxOP.

21. The method of claim 16, wherein:

the first TxOP comprises a base station acquired TxOP and the second TxOP comprise a user equipment (UE) acquired TxOP.

22. An apparatus for wireless communication, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

receive an uplink grant that conveys an indication of a multi-transmission opportunity (TxOP) grant;

transmit, during a first TxOP, a first uplink transmission in one or more subframes in accordance with the multi-TxOP grant; and

transmit, during a second TxOP, a second uplink transmission in one or more subframes in accordance with the multi-TxOP grant.

23. The apparatus of claim 22, wherein the instructions are further executable by the processor to:

receive a trigger indicator in one or both of the first and second TxOPs during a subframe that is before the subframe in which the first or second uplink transmissions are transmitted, the trigger indicator indicating that repetitive uplink transmissions are permitted to be transmitted during the first or second TxOPs.

24. The apparatus of claim 23, wherein the trigger indication comprises at least one of an on/off indication or a sequence number for the trigger indicator using one or more bits of the trigger indicator.

25. The apparatus of claim 24, wherein the instructions are further executable by the processor to:

monitor a configured set of bits in a common control signaling to determine the sequence number for the trigger indicator.

26. The apparatus of claim 24, wherein the one or more bits of the trigger indicator are based at least in part on a resource identifier indicated in a downlink control indicator (DCI).

27. An apparatus for wireless communication, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

transmit an uplink grant that conveys an indication of a multi-transmission opportunity (TxOP) grant;

receive, during a first TxOP, a first uplink transmission in one or more subframes in accordance with the multi-TxOP grant; and

receive, during a second TxOP, a second uplink transmission in one or more subframes in accordance with the multi-TxOP grant.

28. The apparatus of claim 27, wherein the instructions are further executable by the processor to:

transmit a trigger indicator in at least one of the first or second TxOPs during a subframe that is before the subframe in which the first or second uplink transmissions are received, the trigger indicator indicating that repetitive uplink transmissions are permitted to be transmitted during the first or second TxOPs.

29. The apparatus of claim 27, wherein the instructions are further executable by the processor to:

receive a dense reference signal during a first uplink subframe of one or both of the first and second TxOPs.

30. The apparatus of claim 27, wherein:

the first TxOP and the second TxOP are the same, and wherein the uplink grant is received in a TxOP other than the first or second TxOPs.