TECHNIQUES FOR ALLOCATING TIME AND FREQUENCY RESOURCES TO AN UPLINK CHANNEL TO CARRY UPLINK CONTROL INFORMATION USED FOR NARROWBAND COMMUNICATION

• US 20170064694A1
• Filed: 08/24/2016
• Published: 03/02/2017
• Est. Priority Date: 09/02/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wang, Renqiu, Chen, Wanshi, Rico Alvarino, Alberto, Xu, Hao, Gaal, Peter, Fakoorian, Seyed Ali Akbar, Vajapeyam, Madhavan Srinivasan
• Granted Patent: US 10,327,232 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04J 2013/0088 with FDM/FDMA and TDM/TDMA
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Techniques are described for wireless communication. A method for wireless communication at a base station includes identifying time resources and frequency resources for narrowband communication in a plurality of subframes, identifying a plurality of user equipment (UE) devices, allocating a first portion of the time resources and the frequency resources to an uplink (UL) channel to carry UL control information, and allocating resources of the UL channel to the identified UE devices. A method for wireless communication at a UE device includes identifying time resources and frequency resources for narrowband communication in a plurality of subframes, receiving an indication of at least a first portion of the time resources and the frequency resources allocated to a UL channel to carry UL control information for the UE device, and transmitting one or both of downlink acknowledgements (ACKs) and downlink non-acknowledgements (NAKs) on the UL channel.

Claims

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

identifying time resources and frequency resources for narrowband communication in a plurality of subframes;

identifying a plurality of user equipment (UE) devices;

allocating at least a first portion of the time resources and the frequency resources to an uplink (UL) channel to carry UL control information; and

allocating resources of the UL channel to the identified plurality of UE devices.

2. The method of claim 1, further comprising:

receiving from one or more of the plurality of UE devices, on the UL channel, one or both of downlink acknowledgements (ACKs) and downlink non-acknowledgements (NAKs).

3. The method of claim 1, further comprising:

multiplexing the UL channel with a physical uplink shared channel (PUSCH), a physical random access channel (PRACH), a sounding reference signal (SRS), or a combination thereof, in one or both of a time domain and a frequency domain.

4. The method of claim 1, wherein the UL channel comprises a dedicated physical uplink control channel (PUCCH).

5. The method of claim 1, further comprising:

allocating a same number of resources of the UL channel to reference symbol transmissions and data symbol transmissions.

6. The method of claim 1, wherein allocating resources of the UL channel to the plurality of UE devices comprises:

allocating resources of the UL channel to the plurality of UE devices using cross-slot code division multiplexing (CDM) in a time domain, CDM in a frequency domain, frequency domain multiplexing (FDM), or a combination thereof.

7. The method of claim 1, further comprising:

receiving, on the UL channel, a multiple tone transmission from the plurality of UE devices.

8. The method of claim 1, further comprising:

receiving on the UL channel, in parallel, a single tone transmission from the plurality of UE devices.

9. The method of claim 1, further comprising:

receiving from a UE device of the plurality of UE devices, in parallel on the UL channel, a plurality of single tone transmissions.

10. The method of claim 1, wherein allocating at least the first portion of the time resources and the frequency resources to the UL channel comprises:

allocating a same set of frequency resources to the UL channel for a first slot and a second slot in the plurality of subframes.

11. The method of claim 1, wherein allocating at least the first portion of the time resources and the frequency resources to the UL channel comprises:

allocating a same set of frequency resources or a different set of frequency resources to the UL channel from one subframe to another subframe in the plurality of subframes.

12. The method of claim 1, wherein allocating resources of the UL channel to the plurality of UE devices comprises:

allocating resources of the UL channel to the plurality of UE devices using intra-resource block frequency hopping.

13. The method of claim 1, wherein the time resources and the frequency resources of the UL channel allocated to the plurality of UE devices comprise bundled transmission time intervals (TTIs).

14. The method of claim 1, further comprising:

approximating channel state information (CSI) for at least one downlink of the narrowband communication based at least in part on a measurement of a sounding reference signal (SRS), channel quality information (CQI) for an uplink of the narrowband communication, a CQI received on a physical uplink shared channel (PUSCH), or a combination thereof.

15. The method of claim 1, wherein allocating resources of the UL channel to the plurality of UE devices comprises:

allocating resources of the UL channel to a UE device of the plurality of UE devices based at least in part on a coverage enhancement (CE) level associated with the UE device.

16. The method of claim 1, further comprising:

transmitting a sounding reference signal (SRS) during each symbol period of each subframe of the plurality of subframes.

17. An apparatus for wireless communication at a base station, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to cause the apparatus to;

identify time resources and frequency resources for narrowband communication in a plurality of subframes;

identify a plurality of user equipment (UE) devices;

allocate at least a first portion of the time resources and the frequency resources to an uplink (UL) channel to carry UL control information; and

allocate resources of the UL channel to the identified plurality of UE devices.

18. The apparatus of claim 17, wherein the instructions are executable by the processor to:

receive from one or more of the plurality of UE devices, on the UL channel, one or both of downlink acknowledgements (ACKs) and downlink non-acknowledgements (NAKs).

19. The apparatus of claim 17, wherein the instructions are executable by the processor to:

multiplex the UL channel with a physical uplink shared channel (PUSCH), a physical random access channel (PRACH), a sounding reference signal (SRS), or a combination thereof, in one or both of a time domain and a frequency domain.

20. The apparatus of claim 17, wherein the UL channel comprises a dedicated physical uplink control channel (PUCCH).

21. The apparatus of claim 17, wherein the instructions are executable by the processor to:

allocate a same number of resources of the UL channel to reference symbol transmissions and data symbol transmissions.

22. The apparatus of claim 17, wherein the instructions executable by the processor to allocate resources of the UL channel to the plurality of UE devices comprise instructions executable by the processor to:

allocate resources of the UL channel to the plurality of UE devices using cross-slot code division multiplexing (CDM) in a time domain, CDM in a frequency domain, frequency domain multiplexing (FDM), or a combination thereof.

23. The apparatus of claim 17, wherein the instructions executable by the processor to allocate at least the first portion of the time resources and the frequency resources to the UL channel comprise instructions executable by the processor to:

allocate a same set of frequency resources to the UL channel for a first slot and a second slot in the plurality of subframes.

24. The apparatus of claim 17, wherein the instructions executable by the processor to allocate at least the first portion of the time resources and the frequency resources to the UL channel comprise instructions executable by the processor to:

allocate a same set of frequency resources or a different set of frequency resources to the UL channel from one subframe to another subframe in the plurality of subframes.

25. The apparatus of claim 17, wherein the instructions executable by the processor to allocate resources of the UL channel to the plurality of UE devices further comprise instructions executable by the processor to:

allocate resources of the UL channel to the plurality of UE devices using intra-resource block frequency hopping.

26. The apparatus of claim 17, wherein the time resources and the frequency resources of the UL channel allocated to the plurality of UE devices comprise bundled transmission time intervals (TTIs).

27. The apparatus of claim 17, wherein the instructions executable by the processor to allocate resources of the UL channel to the plurality of UE devices further comprise instructions executable by the processor to:

allocate resources of the UL channel to a UE device of the plurality of UE devices based at least in part on a coverage enhancement (CE) level associated with the UE device.

28. A method for wireless communication at a user equipment (UE) device, comprising:

identifying time resources and frequency resources for narrowband communication in a plurality of subframes;

receiving an indication of at least a first portion of the time resources and the frequency resources allocated to an uplink (UL) channel to carry UL control information for the UE device; and

transmitting one or both of downlink acknowledgements (ACKs) and downlink non-acknowledgements (NAKs) on the UL channel.

29. The method of claim 28, further comprising:

transmitting a physical uplink shared channel (PUSCH), wherein the UL channel is multiplexed with the PUSCH.

30. The method of claim 28, wherein the UL channel comprises a dedicated physical uplink control channel (PUCCH).

31. The method of claim 28, further comprising:

transmitting a same number of reference symbols and data symbols on the UL channel.

32. The method of claim 28, further comprising:

transmitting on the UL channel using cross-slot code division multiplexing (CDM) in a time domain, CDM in a frequency domain, frequency domain multiplexing (FDM), or a combination thereof.

33. An apparatus for wireless communication at a user equipment (UE) device, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to;

identify time resources and frequency resources for narrowband communication in a plurality of subframes;

receive an indication of at least a first portion of the time resources and the frequency resources allocated to an uplink (UL) channel to carry UL control information for the UE device; and

transmit one or both of downlink acknowledgements (ACKs) and downlink non-acknowledgements (NAKs) on the UL channel.

34. The apparatus of claim 33, wherein the instructions are executable by the processor to:

transmit a physical uplink shared channel (PUSCH), wherein the UL channel is multiplexed with the PUSCH.

35. The apparatus of claim 33, wherein the UL channel comprises a dedicated physical uplink control channel (PUCCH).

36. The apparatus of claim 33, wherein the instructions are executable by the processor to:

transmit a same number of reference symbols and data symbols on the UL channel.

37. The apparatus of claim 33, wherein the instructions are executable by the processor to:

transmit on the UL channel using cross-slot code division multiplexing (CDM) in a time domain, CDM in a frequency domain, frequency domain multiplexing (FDM), or a combination thereof.