Scheduling request for one or more uplink transmissions using narrowband communications

• US 10,674,522 B2
• Filed: 09/28/2017
• Issued: 06/02/2020
• Est. Priority Date: 03/23/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wang, Xiao feng, Rico Alvarino, Alberto, Bhattad, Kapil, Xu, Hao
• Primary Examiner(s): Jaroenchonwanit, Bunjob
• Application Number:
  US15/718,418
• Publication Number:
  US 20180279324A1
• Time in Patent Office: 978 Days
• Field of Search: None
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

The present disclosure may support dedicated scheduling request resources in a NPUSCH format resource structure, a NPRACH, and/or an ACK/NACK transmission associated with a downlink transmission received at the UE. In addition, the present disclosure may provide various techniques to mitigate collisions between scheduling requests transmitted by a UE, uplink transmissions sent by different UEs, and/or downlink transmissions sent by a base station. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may receive one or more downlink transmissions from a base station. The apparatus may determine to transmit an uplink transmission to the base station. The apparatus transmit, to the base station, a scheduling request for the uplink transmission with an ACK/NACK associated with the one or more downlink transmissions using a narrowband NPUSCH format resource structure.

Claims

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

receiving one or more downlink transmissions from a base station;

determining to transmit an uplink transmission to the base station; and

transmitting, to the base station, a scheduling request for the uplink transmission with an acknowledgement (ACK)/negative ACK (NACK) associated with the one or more downlink transmissions using a narrowband physical uplink shared channel (NPUSCH) format resource structure, wherein the UE is configured to increase a first number of repeated transmissions of the scheduling request based on third signaling received from the base station.

2. The method of claim 1, wherein the UE is configured to transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on first signaling received from the base station.

3. The method of claim 2, wherein the first signaling is included in a media access control (MAC) command or a radio resource control (RRC) reconfiguration signaling.

4. The method of claim 2, wherein the UE transmits the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions after the first signaling is received and a counter at the UE reaches a threshold number.

5. The method of claim 4, wherein the threshold number is determined based on information included in the first signaling or based on preconfigured information at the UE.

6. The method of claim 1, wherein the UE is configured to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on second signaling received from the base station.

7. The method of claim 6, wherein the UE determines to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions when a timer at the UE expires.

8. The method of claim 1, wherein the transmitting the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions using the NPUSCH format resource structure comprises:

transmitting the scheduling request with the ACK/NACK a second number of transmissions, the second number of transmissions being associated with a number of repetitions for the NPUSCH format resource structure; and

transmitting the scheduling request using allocated resources without the ACK/NACK a third number of transmissions, the third number of transmissions being a difference between the first number of repeated transmissions and the second number of transmissions associated with the NPUSCH format resource structure.

9. The method of claim 1, further comprising:

performing quadrature phase-shift keying (QPSK) mapping of a first bit value associated with the scheduling request and a second bit value associated with the ACK/NACK; and

performing at least one of channel coding or data scrambling of the scheduling request and the ACK/NACK after the QPSK mapping.

10. The method of claim 9, further comprising:

performing binary phase-shift keying (BPSK) mapping of the second bit value associated with the ACK/NACK;

determining if the scheduling request is transmitted with the ACK/NACK; and

shifting the BPSK mapping of the second bit value associated with the ACK/NACK by 90°

or another angle predetermined or configured by the network.

11. An apparatus for wireless communication for a user equipment (UE), comprising:

means for receiving one or more downlink transmissions from a base station;

means for determining to transmit an uplink transmission to the base station; and

means for transmitting, to the base station, a scheduling request for the uplink transmission with an acknowledgement (ACK)/negative ACK (NACK) associated with the one or more downlink transmissions using a narrowband physical uplink shared channel (NPUSCH) format resource structure, wherein the UE is configured to increase a first number of repeated transmissions of the scheduling request based on third signaling received from the base station.

12. The apparatus of claim 11, wherein the UE is configured to transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on first signaling received from the base station.

13. The apparatus of claim 12, wherein the first signaling is included in a media access control (MAC) command or a radio resource control (RRC) reconfiguration signaling.

14. The apparatus of claim 12, wherein the UE transmits the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions after the first signaling is received and a counter at the UE reaches a threshold number.

15. The apparatus of claim 14, wherein the threshold number is determined based on information included in the first signaling or based on preconfigured information at the UE.

16. The apparatus of claim 11, wherein the UE is configured to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on second signaling received from the base station.

17. The apparatus of claim 16, wherein the UE determines to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions when a timer at the UE expires.

18. The apparatus of claim 11, wherein the means for transmitting the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions using the NPUSCH format resource structure is configured to:

transmit the scheduling request with the ACK/NACK a second number of transmissions, the second number of transmissions being associated with a number of repetitions for the NPUSCH format resource structure; and

transmit the scheduling request using allocated resources without the ACK/NACK a third number of transmissions, the third number of transmissions being a difference between the first number of repeated transmissions and the second number of transmissions associated with the NPUSCH format resource structure.

19. The apparatus of claim 11, further comprising:

means for performing quadrature phase-shift keying (QPSK) mapping of a first bit value associated with the scheduling request and a second bit value associated with the ACK/NACK; and

means for performing at least one of channel coding or data scrambling of the scheduling request and the ACK/NACK after the QPSK mapping.

20. The apparatus of claim 19, further comprising:

means for performing binary phase-shift keying (BPSK) mapping of the second bit value associated with the ACK/NACK;

means for determining if the scheduling request is transmitted with the ACK/NACK; and

means for shifting the BPSK mapping of the second bit value associated with the ACK/NACK by 90°

or another angle predetermined or configured by the network.

21. An apparatus for wireless communication for a user equipment (UE), comprising:

a memory; and

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

receive one or more downlink transmissions from a base station;

determine to transmit an uplink transmission to the base station; and

transmit, to the base station, a scheduling request for the uplink transmission with an acknowledgement (ACK)/negative ACK (NACK) associated with the one or more downlink transmissions using a narrowband physical uplink shared channel (NPUSCH) format resource structure, wherein the UE is configured to increase a first number of repeated transmissions of the scheduling request based on third signaling received from the base station.

22. The apparatus of claim 21, wherein the UE is configured to transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on first signaling received from the base station.

23. The apparatus of claim 22, wherein the first signaling is included in a media access control (MAC) command or a radio resource control (RRC) reconfiguration signaling.

24. The apparatus of claim 22, wherein the UE transmits the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions after the first signaling is received and a counter at the UE reaches a threshold number.

25. The apparatus of claim 24, wherein the threshold number is determined based on information included in the first signaling or based on preconfigured information at the UE.

26. The apparatus of claim 21, wherein the UE is configured to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on second signaling received from the base station.

27. The apparatus of claim 26, wherein the UE determines to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions when a timer at the UE expires.

28. The apparatus of claim 21, wherein the at least one processor is configured to transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions using the NPUSCH format resource structure by:

transmitting the scheduling request with the ACK/NACK a second number of transmissions, the second number of transmissions being associated with a number of repetitions for the NPUSCH format resource structure; and

transmitting the scheduling request using allocated resources without the ACK/NACK a third number of transmissions, the third number of transmissions being a difference between the first number of repeated transmissions and the second number of transmissions associated with the NPUSCH format resource structure.

29. The apparatus of claim 21, wherein the at least one processor is further configured to:

perform quadrature phase-shift keying (QPSK) mapping of a first bit value associated with the scheduling request and a second bit value associated with the ACK/NACK; and

perform at least one of channel coding or data scrambling of the scheduling request and the ACK/NACK after the QPSK mapping.

30. The apparatus of claim 29, wherein the at least one processor is further configured to:

perform binary phase-shift keying (BPSK) mapping of the second bit value associated with the ACK/NACK;

determine if the scheduling request is transmitted with the ACK/NACK; and

shift the BPSK mapping of the second bit value associated with the ACK/NACK by 90°

or another angle predetermined or configured by the network.

31. A computer-readable non-transitory medium storing computer executable code for a user equipment (UE), comprising code to:

receive one or more downlink transmissions from a base station;

determine to transmit an uplink transmission to the base station; and

transmit, to the base station, a scheduling request for the uplink transmission with an acknowledgement (ACK)/negative ACK (NACK) associated with the one or more downlink transmissions using a narrowband physical uplink shared channel (NPUSCH) format resource structure, wherein the UE is configured to increase a first number of repeated transmissions of the scheduling request based on third signaling received from the base station.

32. The computer-readable non-transitory medium of claim 31, wherein the UE is configured to transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on first signaling received from the base station.

33. The computer-readable non-transitory medium of claim 32, wherein the first signaling is included in a media access control (MAC) command or a radio resource control (RRC) reconfiguration signaling.

34. The computer-readable non-transitory medium of claim 32, wherein the UE transmits the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions after the first signaling is received and a counter at the UE reaches a threshold number.

35. The computer-readable non-transitory medium of claim 34, wherein the threshold number is determined based on information included in the first signaling or based on preconfigured information at the UE.

36. The computer-readable non-transitory medium of claim 31, wherein the UE is configured to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions based on second signaling received from the base station.

37. The computer-readable non-transitory medium of claim 36, wherein the UE determines to not transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions when a timer at the UE expires.

38. The computer-readable non-transitory medium of claim 31, wherein the code to transmit the scheduling request for the uplink transmission with the ACK/NACK associated with the one or more downlink transmissions using the NPUSCH format resource structure is configured to:

transmit the scheduling request with the ACK/NACK a second number of transmissions, the second number of transmissions being associated with a number of repetitions for the NPUSCH format resource structure; and

transmit the scheduling request using allocated resources without the ACK/NACK a third number of transmissions, the third number of transmissions being a difference between the first number of repeated transmissions and the second number of transmissions associated with the NPUSCH format resource structure.

39. The computer-readable medium of claim 31, further comprising code to:

perform quadrature phase-shift keying (QPSK) mapping of a first bit value associated with the scheduling request and a second bit value associated with the ACK/NACK; and

perform at least one of channel coding or data scrambling of the scheduling request and the ACK/NACK after the QPSK mapping.

40. The computer-readable medium of claim 39, further comprising code to:

perform binary phase-shift keying (BPSK) mapping of the second bit value associated with the ACK/NACK;

determine if the scheduling request is transmitted with the ACK/NACK; and

shift the BPSK mapping of the second bit value associated with the ACK/NACK by 90°

or another angle predetermined or configured by the network.