GRANTLESS UPLINK TRANSMISSION FOR EMTC-U

• US 20180352563A1
• Filed: 03/20/2018
• Published: 12/06/2018
• Est. Priority Date: 06/01/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Liu, Chih-Hao, Yerramalli, Srinivas, Kadous, Tamer
• Granted Patent: US 10,904,908 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 72/1268 of uplink data flows
• 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

Abstract

Methods, systems, and devices for wireless communication are described. A base station may transmit downlink control information to a user equipment (UE). The downlink control information may identify a grantless uplink group associated with one or more grantless uplink subframes for the UE. The UE may transmit uplink control information for the one or more grantless uplink subframes associated with the indicated uplink group of the UE. The UE may then transmit grantless uplink data during at least one of the one or more grantless uplink subframes based at least in part on the grantless uplink group associated for the UE and the uplink control information.

Claims

1. A method for wireless communication, comprising:

receiving, at a user equipment (UE), a radio resource control (RRC) message comprising an indication of a uplink group of the UE, the uplink group associated with one or more uplink subframes;

transmitting, by the UE, uplink control information for the one or more uplink subframes associated with the indicated uplink group of the UE; and

transmitting unscheduled uplink data during at least one of the one or more uplink subframes based at least in part on the uplink group of the UE and the uplink control information.

2. The method of claim 1, further comprising:

determining, based at least in part on the RRC message, a set of uplink resources for the uplink control information for the one or more uplink subframes.

3. The method of claim 1, further comprising:

determining a frequency subband of a system bandwidth based at least in part on the uplink group of the UE; and

wherein the unscheduled uplink data is transmitted using the frequency subband of the system bandwidth during the at least one of the one or more uplink subframes.

4. The method of claim 3, further comprising:

determining, based at least in part on the RRC message, a resource block allocation to the UE for the unscheduled uplink data; and

wherein the resource block allocation to the UE is a subset of a total set of resource blocks associated with the frequency subband, and the unscheduled uplink data is transmitted using the resource block allocation during the at least one of the one or more uplink subframes.

5. The method of claim 1, further comprising:

receiving downlink control information from a base station;

determining, based at least in part on the downlink control information, a frame structure and an uplink subframe type for the unscheduled uplink data; and

transmitting the unscheduled uplink data during the at least one of the one or more uplink subframes is further based at least in part on the determined frame structure and the uplink subframe type.

6. The method of claim 5, further comprising:

determining, based at least in part on the downlink control information, that an unscheduled uplink data transmission is permissible during a current frame; and

transmitting the unscheduled uplink data during the at least one of the one or more uplink subframes is further based on the determination that the unscheduled uplink data transmission is permissible during the current frame.

7. The method of claim 1, further comprising:

transmitting uplink capability information of the UE to a base station.

8. The method of claim 1, wherein:

the indication of the uplink group of the UE comprises an explicit identification of the uplink group of the UE.

9. The method of claim 1, wherein:

the uplink group of the UE is identified based at least in part on a number of uplink subframes and a number of repetitions for the unscheduled uplink data.

10. The method of claim 1, further comprising:

providing a measurement report to a base station; and

wherein the UE is associated with the uplink group based at least in part on the measurement report.

11. The method of claim 1, wherein:

the uplink control information comprises one or more of;

a new data indicator, a redundancy version, a hybrid automatic repeat request (HARQ) identifier, a UE identifier, a number of repetitions for uplink control information, and a number of repetitions for the unscheduled uplink data.

12. The method of claim 11, further comprising:

determining the number of repetitions based at least in part on a signal strength measurement or signaling from a base station.

13. The method of claim 1, wherein:

the uplink control information comprises an indication of resource blocks associated with the unscheduled uplink data.

14. The method of claim 13, wherein:

the resource blocks associated with the unscheduled uplink data comprise a subset of a total number of resource blocks allocated to the UE for the unscheduled uplink data in the RRC message.

15. A method for wireless communication, comprising:

transmitting to a user equipment (UE), by a base station, a radio resource control (RRC) message comprising an indication of a uplink group of the UE, the uplink group associated with one or more uplink subframes;

receiving, from the UE, uplink control information for the one or more uplink subframes associated with the indicated uplink group of the UE; and

receiving unscheduled uplink data during at least one of the one or more of the uplink subframes based at least in part on the uplink group of the UE is assigned and the uplink control information.

16. The method of claim 15, further comprising:

transmitting downlink control information to the UE; and

receiving the unscheduled uplink data based at least in part on a frame structure and an uplink subframe type associated with the downlink control information.

17. The method of claim 15, further comprising:

receiving uplink capability information of the UE.

18. The method of claim 15, wherein:

the indication of the uplink group of the UE comprises an explicit identification of the uplink group of the UE.

19. The method of claim 15, wherein:

the uplink group is identified based at least in part on a number of uplink subframes and a number of repetitions for the unscheduled uplink data.

20. The method of claim 15, further comprising:

receiving a measurement report from the UE; and

associating the UE with the uplink group based at least in part on the measurement report.

21. The method of claim 15, wherein:

the uplink control information comprises one or more of;

a new data indicator, a redundancy version, a hybrid automatic repeat request (HARQ) identifier, a UE identifier, a number of repetitions for uplink control data, and a number of repetitions for the unscheduled uplink data.

22. The method of claim 15, wherein:

the uplink control information comprises an indication of resource blocks associated with the unscheduled uplink data.

23. The method of claim 22, wherein:

the resource blocks associated with the unscheduled uplink data comprise a subset of a total number of resource blocks allocated to the UE for the unscheduled uplink data in the RRC message.

24. An apparatus for wireless communication, 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, at a user equipment (UE), a radio resource control (RRC) message comprising an indication of a uplink group of the UE, the uplink group associated with one or more uplink subframes;

transmit, by the UE, uplink control information for the one or more uplink subframes associated with the indicated uplink group of the UE; and

transmit unscheduled uplink data during at least one of the one or more uplink subframes based at least in part on the uplink group of the UE and the uplink control information.

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

determine, based at least in part on the RRC message, a set of uplink resources for the uplink control information for the one or more uplink subframes.

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

determine a frequency subband of a system bandwidth based at least in part on the uplink group of the UE; and

wherein the unscheduled uplink data is transmitted using the frequency subband of the system bandwidth during the at least one of the one or more uplink subframes.

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

transmit uplink capability information of the UE to a base station.

28. The apparatus of claim 24, wherein:

the indication of the uplink group of the UE comprises an explicit identification of the uplink group of the UE.

29. The apparatus of claim 24, wherein:

the uplink control information comprises one or more of;

a new data indicator, a redundancy version, a hybrid automatic repeat request (HARQ) identifier, a UE identifier, a number of repetitions for uplink control information, and a number of repetitions for the unscheduled uplink data.

30. An apparatus for wireless communication, 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 to a user equipment (UE), by a base station, a radio resource control (RRC) message comprising an indication of a uplink group of the UE, the uplink group associated with one or more uplink subframes;

receive, from the UE, uplink control information for the one or more uplink subframes associated with the indicated uplink group of the UE; and

receive unscheduled uplink data during at least one of the one or more of the uplink subframes based at least in part on the uplink group of the UE is assigned and the uplink control information.