# US 11,122,566 B2 · Waveform design based on power spectral density (PSD) parameters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,566 B2 - Document ID: US11122566B2 - Status: Granted - Kind: B2 - Application number: 16/020,400 - Filed: 2018-06-27 - Published: 2019-01-24 - Granted: 2021-09-14 - Earliest claimed: 2017-07-20 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Xiaoxia Zhang; Jing Sun; Tamer Kadous - Web page: https://patentgrep.com/patent/US11122566B2 ## CPC - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0042: {Intra-user or intra-terminal allocation} - H04L 5/0066: {Requirements on out-of-channel emissions} - H04L 27/2602: {Signal structure} - H04W 52/16: Deriving transmission power values from another channel - H04W 52/365: {Power headroom reporting} - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0092: {Indication of how the channel is divided} - H04L 27/2614: {Peak power aspects} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## 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 ### Claim 1 A method of wireless communication, comprising: selecting, by a first wireless communication device, an interlaced frequency structure for communicating in a first frequency band of a frequency spectrum based on a power spectral density (PSD) parameter of the frequency spectrum, wherein selecting the interlaced frequency structure based on the PSD parameter of the frequency spectrum comprises selecting between the interlaced frequency structure and a non-interlaced frequency structure based on the PSD parameter; communicating, by the first wireless communication device with a second wireless communication device in the first frequency band of the frequency spectrum, a first communication signal using a lower subcarrier spacing (SCS) for the selected interlaced frequency structure; and communicating, by the first wireless communication device with the second wireless communication device in a second frequency band of the frequency spectrum, a second communication signal using a greater SCS for the non-interlaced frequency structure. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) The method of claim 1, 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 for communicating in the first frequency band when determining that the frequency spectrum has the PSD requirement. ### Claim 4 (depends on 1) The method of claim 1, further comprising transmitting, by the first wireless communication device, a configuration indicating the interlaced frequency structure for communicating in the first frequency band of the frequency spectrum. ### Claim 5 (depends on 4) The method of claim 4, wherein the selecting is based on a power headroom of the second wireless communication device. ### Claim 6 (depends on 1) The method of claim 1, further comprising receiving, by the first wireless communication device from the second wireless communication device, a configuration indicating the interlaced frequency structure for communicating in the first frequency band of the frequency spectrum, wherein the selecting is based on the configuration. ### Claim 7 (depends on 1) 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 the interlaced frequency structure and a second set of random access resources having the 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. ### Claim 8 (depends on 7) The method of claim 7, 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. ### Claim 9 (depends on 7) The method of claim 7, wherein the first set of random access resources and the second set of random access resources are in different time periods. ### Claim 10 (depends on 7) The method of claim 7, 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. ### Claim 11 (depends on 7) The method of claim 7, wherein the communicating the configuration includes receiving, by the first wireless communication device from the second wireless communication device, the configuration. ### Claim 12 (depends on 11) The method of claim 11, 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. ### Claim 13 (depends on 11) The method of claim 11, 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. ### Claim 14 (depends on 13) The method of claim 13, 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 PSD parameter of a frequency band of the second set of random access resources. ### Claim 15 (depends on 1) 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. ### Claim 16 An apparatus comprising: a processor configured to select, between an interlaced frequency structure and a non-interlaced frequency structure, the interlaced frequency structure for communicating in a first frequency band of a frequency spectrum based on a power spectral density (PSD) parameter of the frequency spectrum; a transceiver configured to: communicate, with a second wireless communication device in the frequency spectrum, a first communication signal using the selected interlaced frequency structure; and communicate, with the second wireless communication device in a second frequency band of the frequency spectrum, a second communication signal using the non-interlaced frequency structure. ### Claim 17 (depends on 16) The apparatus of claim 16, 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. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the PSD parameter is associated with a PSD requirement in the frequency spectrum, and wherein the processor is further configured to select the interlaced frequency structure by: determining whether the frequency spectrum has the PSD requirement; and selecting the interlaced frequency structure for communicating in the first frequency band when determining that the frequency spectrum has the PSD requirement. ### Claim 19 (depends on 16) The apparatus of claim 16, wherein the transceiver is further configured to transmit a configuration indicating the interlaced frequency structure for communicating in the first frequency band of the frequency spectrum. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the processor is further configured to select the interlaced frequency structure based on a power headroom of the second wireless communication device. ### Claim 21 (depends on 16) The apparatus of claim 16, wherein the transceiver is further configured to receive, from the second wireless communication device, a configuration indicating the interlaced frequency structure for communicating in the first frequency band of the frequency spectrum, and wherein the processor is further configured to select the interlaced frequency structure based on the configuration. ### Claim 22 (depends on 16) The apparatus of claim 16, 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 the interlaced frequency structure and a second set of random access resources having the non-interlaced frequency structure; and communicate, with the second wireless communication device, a random access signal based on the configuration. ### Claim 23 (depends on 22) The apparatus of claim 22, 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. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the first set of random access resources and the second set of random access resources are in different time periods. ### Claim 25 (depends on 22) The apparatus of claim 22, 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. ### Claim 26 (depends on 22) The apparatus of claim 22, wherein the transceiver is further configured to communicate the configuration by receiving, from the second wireless communication device, the configuration. ### Claim 27 (depends on 26) The apparatus of claim 26, 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. ### Claim 28 (depends on 26) The apparatus of claim 26, 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. ### Claim 29 (depends on 28) The apparatus of claim 28, 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 PSD parameter of a frequency band of the second set of random access resources. ### Claim 30 (depends on 16) The apparatus of claim 16, 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. ### Claim 31 A computer-readable medium having program code recorded thereon, the program code comprising: code for causing a first wireless communication device to select, between an interlaced frequency structure and a non-interlaced frequency structure, the interlaced frequency structure for communicating in a first frequency band of a frequency spectrum based on a power spectral density (PSD) parameter of the frequency spectrum; code for causing the first wireless communication device to: communicate, with a second wireless communication device in the frequency spectrum, a first communication signal using the selected interlaced frequency structure; and communicate, with the second wireless communication device in a second frequency band of the frequency spectrum, a second communication signal using the non-interlaced frequency structure. ### Claim 32 (depends on 31) The computer-readable medium of claim 31, 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. ### Claim 33 (depends on 31) The computer-readable medium of claim 31, 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 interlaced frequency structure is further configured to select the interlaced frequency structure by: determining whether the frequency spectrum has the PSD requirement; and selecting the interlaced frequency structure for communicating in the first frequency band when determining that the frequency spectrum has the PSD requirement. ### Claim 34 (depends on 31) The computer-readable medium of claim 31, further comprising code for causing the first wireless communication device to transmit a configuration indicating the interlaced frequency structure for communicating in the first frequency band of the frequency spectrum. ### Claim 35 (depends on 34) The computer-readable medium of claim 34, wherein the code for causing the first wireless communication device to select the interlaced frequency structure is further configured to select the interlaced frequency structure based on a power headroom of the second wireless communication device. ### Claim 36 (depends on 31) The computer-readable medium of claim 31, further comprising code for causing the first wireless communication device to receive, from the second wireless communication device, a configuration indicating the interlaced frequency structure for communicating in the first frequency band of the frequency spectrum, wherein the code for causing the first wireless communication device to select the interlaced frequency structure is further configured to select the interlaced frequency structure based on the configuration. ### Claim 37 (depends on 31) The computer-readable medium of claim 31, 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 the interlaced frequency structure and a second set of random access resources having the 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. ### Claim 38 (depends on 37) The computer-readable medium of claim 37, 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. ### Claim 39 (depends on 37) The computer-readable medium of claim 37, wherein the first set of random access resources and the second set of random access resources are in different time periods. ### Claim 40 (depends on 37) The computer-readable medium of claim 37, 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. ### Claim 41 (depends on 37) The computer-readable medium of claim 37, 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. ### Claim 42 (depends on 41) The computer-readable medium of claim 41, 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. ### Claim 43 (depends on 41) The computer-readable medium of claim 41, 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. ### Claim 44 (depends on 43) The computer-readable medium of claim 43, 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 PSD parameter of a frequency band of the second set of random access resources. ### Claim 45 (depends on 31) The computer-readable medium of claim 31, 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.