WAVEFORM DESIGN BASED ON POWER SPECTRAL DENSITY (PSD) PARAMETERS

• US 20190029019A1
• Filed: 06/27/2018
• Published: 01/24/2019
• Est. Priority Date: 07/20/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Xiaoxia, Sun, Jing, Kadous, Tamer
• Granted Patent: US 11,122,566 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2614 Peak power aspects
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0066 Requirements on out-of-channel emissions
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Wireless communications systems and methods related to communicating in a frequency spectrum using interlaced frequency channels and non-interlaced frequency channels are provided. A first wireless communication device selects a waveform structure between an interlaced frequency structure and a non-interlaced frequency structure for communicating in a frequency spectrum. The first wireless communication device communicates, with a second wireless communication device in the frequency spectrum, a communication signal based on the selected waveform structure. The interlaced frequency structure includes at least a first set of frequency bands in the frequency spectrum, the first set of frequency bands interlacing with a second set of frequency bands in the frequency spectrum. The non-interlaced frequency structure includes one or more contiguous frequency bands in the frequency spectrum.

Claims

1. A method of wireless communication, comprising:

selecting, by a first wireless communication device, a waveform structure between an interlaced frequency structure and a non-interlaced frequency structure for communicating in a frequency spectrum; and

communicating, by the first wireless communication device with a second wireless communication device in the frequency spectrum, a communication signal based on the selected waveform structure.

2. The method of claim 1, wherein the interlaced frequency structure includes at least a first set of frequency bands in the frequency spectrum, the first set of frequency bands interlacing with a second set of frequency bands in the frequency spectrum, and wherein the non-interlaced frequency structure includes one or more contiguous frequency bands in the frequency spectrum.

3. The method of claim 1, wherein the selecting is based on a power spectral density (PSD) parameter of the frequency spectrum.

4. The method of claim 3, wherein the PSD parameter is associated with a PSD requirement in the frequency spectrum, and wherein the selecting includes:

determining whether the frequency spectrum has the PSD requirement; and

selecting the interlaced frequency structure as the waveform structure when determining that the frequency spectrum has the PSD requirement.

5. The method of claim 3, wherein the PSD parameter is associated with a PSD requirement in the frequency spectrum, wherein the selecting is based on a first frequency band having the PSD requirement and a second frequency band not having the PSD requirement, and wherein the communicating includes:

communicating a first communication signal with the interlaced frequency structure in the first frequency band; and

communicating a second communication signal with the non-interlaced frequency structure in the second frequency band.

6. The method of claim 1, further comprising transmitting, by the first wireless communication device, a configuration indicating the waveform structure for communicating in the frequency spectrum.

7. The method of claim 6, wherein the selecting is based on a power headroom of the second wireless communication device.

8. The method of claim 1, further comprising receiving, by the first wireless communication device from the second wireless communication device, a configuration indicating the waveform structure for communicating in the frequency spectrum, wherein the selecting is based on the configuration.

9. The method of claim 1, further comprising:

communicating, by the first wireless communication device with the second wireless communication device, a configuration indicating a first set of random access resources having a interlaced frequency structure and a second set of random access resources having a non-interlaced frequency structure; and

communicating, by the first wireless communication device with the second wireless communication device, a random access signal based on the configuration.

10. The method of claim 9, wherein the first set of random access resources and the second set of random access resources are in different frequency bands within the frequency spectrum.

11. The method of claim 9, wherein the first set of random access resources and the second set of random access resources are in different time periods.

12. The method of claim 9, wherein the communicating the configuration includes transmitting, by the first wireless communication device to the second wireless communication device, the configuration, and wherein the communicating the random access signal includes monitoring, by the first wireless communication device, for the random access signal.

13. The method of claim 9, wherein the communicating the configuration includes receiving, by the first wireless communication device from the second wireless communication device, the configuration.

14. The method of claim 13, further comprising:

determining, by the first wireless communication device, whether to transmit the random access signal to the second wireless communication device using the first set of random access resources or the second set of random access resources based on at least one of the configuration, a power headroom of the second wireless communication device, or a power utilization factor of the second wireless communication device.

15. The method of claim 13, wherein the communicating the random access signal includes:

transmitting, by the first wireless communication device to the second wireless communication device using the second set of random access resources, a first random access signal with the non-interlaced frequency structure at a first transmit power; and

transmitting, by the first wireless communication device to the second wireless communication device using the first set of random access resources, a second random access signal with the interlaced frequency structure at a second transmit power greater than the first transmit power.

16. The method of claim 15, further comprising determining, by the first wireless communication device, to transmit the second random access signal with the interlaced frequency structure using the first set of random access resources based on a comparison between the second transmit power and a power spectral density (PSD) parameter of a frequency band of the second set of random access resources.

17. The method of claim 1, wherein the frequency spectrum includes a first subcarrier spacing for the non-interlaced frequency structure, wherein the communicating the communication signal includes communicating the communication signal using a second subcarrier spacing for the interlaced frequency structure, and wherein the first subcarrier spacing is greater than the second subcarrier spacing.

18. An apparatus comprising:

a processor configured to select a waveform structure between an interlaced frequency structure and a non-interlaced frequency structure for communicating in a frequency spectrum; and

a transceiver configured to communicate, with a second wireless communication device in the frequency spectrum, a communication signal based on the selected waveform structure.

19. The apparatus of claim 18, wherein the interlaced frequency structure includes at least a first set of frequency bands in the frequency spectrum, the first set of frequency bands interlacing with a second set of frequency bands in the frequency spectrum, and wherein the non-interlaced frequency structure includes one or more contiguous frequency bands in the frequency spectrum.

20. The apparatus of claim 18, wherein the processor is further configured to select the waveform structure based on a power spectral density (PSD) parameter of the frequency spectrum.

21. The apparatus of claim 20, wherein the PSD parameter is associated with a PSD requirement in the frequency spectrum, and wherein the processor is further configured to select the waveform structure by:

determining whether the frequency spectrum has a PSD requirement; and

selecting the interlaced frequency structure as the waveform structure when determining that the frequency spectrum has the PSD requirement.

22. The apparatus of claim 20, wherein the PSD parameter is associated with a PSD requirement in the frequency spectrum, wherein the processor is further configured to select the waveform structure based on a first frequency band having the PSD requirement and a second frequency band not having the PSD requirement, and wherein the transceiver is further configured to:

communicate a first communication signal with the interlaced frequency structure in the first frequency band; and

communicate a second communication signal with the non-interlaced frequency structure in the second frequency band.

23. The apparatus of claim 18, wherein the transceiver is further configured to transmit a configuration indicating the waveform structure for communicating in the frequency spectrum.

24. The apparatus of claim 23, wherein the processor is further configured to select the waveform structure based on a power headroom of the second wireless communication device.

25. The apparatus of claim 18, wherein the transceiver is further configured to receive, from the second wireless communication device, a configuration indicating the waveform structure for communicating in the frequency spectrum, and wherein the processor is further configured to select the waveform structure based on the configuration.

26. The apparatus of claim 18, wherein the transceiver is further configured to:

communicate, with the second wireless communication device, a configuration indicating a first set of random access resources having an interlaced frequency structure and a second set of random access resources having a non-interlaced frequency structure; and

communicate, with the second wireless communication device, a random access signal based on the configuration.

27. The apparatus of claim 26, wherein the first set of random access resources and the second set of random access resources are in different frequency bands within the frequency spectrum.

28. The apparatus of claim 26, wherein the first set of random access resources and the second set of random access resources are in different time periods.

29. The apparatus of claim 26, wherein the transceiver is further configured to:

communicate the configuration by transmitting, to the second wireless communication device, the configuration; and

communicate the random access signal by monitoring for the random access signal.

30. The apparatus of claim 26, wherein the transceiver is further configured to communicate the configuration by receiving, from the second wireless communication device, the configuration.

31. The apparatus of claim 30, wherein the processor is further configured to determine whether to transmit the random access signal to the second wireless communication device using the first set of random access resources or the second set of random access resources based on at least one of the configuration, a power headroom of the second wireless communication device, or a power utilization factor of the second wireless communication device.

32. The apparatus of claim 30, wherein the transceiver is further configured to communicate the random access signal by:

transmitting, to the second wireless communication device using the second set of random access resources, a first random access signal with the non-interlaced frequency structure at a first transmit power; and

transmitting, to the second wireless communication device using the first set of random access resources, a second random access signal with the interlaced frequency structure at a second transmit power greater than the first transmit power.

33. The apparatus of claim 32, wherein the processor is further configured to determine to transmit the second random access signal with the interlaced frequency structure using the first set of random access resources based on a comparison between the second transmit power and a power spectral density (PSD) parameter of a frequency band of the second set of random access resources.

34. The apparatus of claim 18, wherein the frequency spectrum includes a first SCS for the non-interlaced frequency structure, wherein the transceiver is further configured to communicate the communication signal by communicating the communication signal using a second SCS for the interlaced frequency structure, and wherein the first SCS is greater than the second SCS.

35. A computer-readable medium having program code recorded thereon, the program code comprising:

code for causing a first wireless communication device to select a waveform structure between an interlaced frequency structure and a non-interlaced frequency structure for communicating in a frequency spectrum; and

code for causing the first wireless communication device to communicate, with a second wireless communication device in the frequency spectrum, a communication signal based on the selected waveform structure.

36. The computer-readable medium of claim 35, wherein the interlaced frequency structure includes at least a first set of frequency bands in the frequency spectrum, the first set of frequency bands interlacing with a second set of frequency bands in the frequency spectrum, and wherein the non-interlaced frequency structure includes one or more contiguous frequency bands in the frequency spectrum.

37. The computer-readable medium of claim 35, wherein the code for causing the first wireless communication device to select the waveform structure is further configured to select the waveform structure based on a power spectral density (PSD) parameter of the frequency spectrum.

38. The computer-readable medium of claim 37, wherein the PSD parameter is associated with a PSD requirement in the frequency spectrum, and wherein the code for causing the first wireless communication device to select the waveform structure is further configured to select the waveform structure by:

determining whether the frequency spectrum has the PSD requirement; and

selecting the interlaced frequency structure as the waveform structure when determining that the frequency spectrum has the PSD requirement.

39. The computer-readable medium of claim 37, wherein the PSD parameter is associated with a PSD requirement in the frequency spectrum, wherein the code for causing the first wireless communication device to select the waveform structure is further configured to select the waveform structure based on a first frequency band having the PSD requirement and a second frequency band not having the PSD requirement, and wherein the code for causing the first wireless communication device to communicate the communication signal is further configured to communicate the communicate signal by:

communicating a first communication signal with the interlaced frequency structure in the first frequency band; and

communicating a second communication signal with the non-interlaced frequency structure in the second frequency band.

40. The computer-readable medium of claim 35, further comprising code for causing the first wireless communication device to transmit a configuration indicating the waveform structure for communicating in the frequency spectrum.

41. The computer-readable medium of claim 40, wherein the code for causing the first wireless communication device to select the waveform structure is further configured to select the waveform structure based on a power headroom of the second wireless communication device.

42. The computer-readable medium of claim 35, further comprising code for causing the first wireless communication device to receive, from the second wireless communication device, a configuration indicating the waveform structure for communicating in the frequency spectrum, wherein the code for causing the first wireless communication device to select the waveform structure is further configured to select the waveform structure based on the configuration.

43. The computer-readable medium of claim 35, further comprising:

code for causing the first wireless communication device to communicate, with the second wireless communication device, a configuration indicating a first set of random access resources having an interlaced frequency structure and a second set of random access resources having a non-interlaced frequency structure; and

code for causing the first wireless communication device to communicate, with the second wireless communication device, a random access signal based on the configuration.

44. The computer-readable medium of claim 43, wherein the first set of random access resources and the second set of random access resources are in different frequency bands within the frequency spectrum.

45. The computer-readable medium of claim 43, wherein the first set of random access resources and the second set of random access resources are in different time periods.

46. The computer-readable medium of claim 43, wherein the code for causing the first wireless communication device to communicate the configuration is further configured to transmit, to the second wireless communication device, the configuration, and wherein the code for causing the first wireless communication device to communicate the random access signal is further configured to monitor for the random access signal.

47. The computer-readable medium of claim 43, wherein the code for causing the first wireless communication device to communicate the configuration is further configured to receive, from the second wireless communication device, the configuration.

48. The computer-readable medium of claim 47, further comprising:

code for causing the first wireless communication device to determine whether to transmit the random access signal to the second wireless communication device using the first set of random access resources or the second set of random access resources based on at least one of the configuration, a power headroom of the second wireless communication device, or a power utilization factor of the second wireless communication device.

49. The computer-readable medium of claim 47, wherein the code for causing the first wireless communication device to communicate the random access signal is further configured to:

transmit, to the second wireless communication device using the second set of random access resources, a first random access signal with the non-interlaced frequency structure at a first transmit power; and

transmit, to the second wireless communication device using the first set of random access resources, a second random access signal with the interlaced frequency structure at a second transmit power greater than the first transmit power.

50. The computer-readable medium of claim 49, further comprising code for causing the first wireless communication device to determine to transmit the second random access signal with the interlaced frequency structure using the first set of random access resources based on a comparison between the second transmit power and a power spectral density (PSD) parameter of a frequency band of the second set of random access resources.

51. The computer-readable medium of claim 35, wherein the frequency spectrum includes a first SCS for the non-interlaced frequency structure, wherein the code for causing the first wireless communication device to communicate the communication signal is further configured to communicate the communication signal using a second SCS for the interlaced frequency structure, and wherein the first SCS is greater than the second SCS.