# US 10,772,092 B2 · Mixed numerology OFDM design > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,092 B2 - Document ID: US10772092B2 - Status: Granted - Kind: B2 - Application number: 14/532,714 - Filed: 2014-11-04 - Published: 2015-06-25 - Granted: 2020-09-08 - Earliest claimed: 2013-12-23 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Taesang Yoo; Siddhartha Mallik; Arumugam Chendamarai Kannan; Jelena Damnjanovic; Madhavan Srinivasan Vajapeyam; Jun Wang; Yongbin Wei; Durga Prasad Malladi - Web page: https://patentgrep.com/patent/US10772092B2 ## CPC - H04L 1/1854: {Scheduling and prioritising arrangements} - H04J 11/00: Orthogonal multiplex systems, {e.g. using WALSH codes}(H04J13/00 takes precedence) - H04L 1/18: Automatic repetition systems, e.g. Van Duuren systems - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/0076: {Allocation utility-based} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L 27/2602: {Signal structure} - H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)} - H04L 27/2605: {Symbol extensions, e.g. Zero Tail, Unique Word [UW]} - H04L 43/0864: Round trip delays - H04W 16/32: Hierarchical cell structures - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04J 2011/0009: {with FDM/FDMA} - H04J 2011/0013: {with TDM/TDMA} - H04L 27/2603: {Signal structure ensuring backward compatibility with legacy system} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods, systems, and devices are described for hierarchical communications and low latency support within a wireless communications system. An eNB and/or a UE may be configured to operate within the wireless communications system which is at least partially defined through a first layer with first layer transmissions having a first subframe type and a second layer with second layer transmissions having a second subframe type. The first subframe type may have a first round trip time (RTT) between transmission and acknowledgment of receipt of the transmission, and the second layer may have a second RTT that is less than the first RTT. Subframes of the first subframe type may be multiplexed with subframes of the second subframe type, such as through time division multiplexing. In some examples symbols of different duration may be multiplexed such that they different symbol durations coexist. ## Claims ### Claim 1 A method of wireless communication, comprising: configuring a single frame structure of a single carrier with a first region having a first symbol duration and a second region having a second symbol duration different from the first symbol duration, wherein the first and second regions of the single frame structure of the single carrier are time-division multiplexed (TDM) or frequency-division multiplexed (FDM), wherein the first region includes a control channel and a shared channel, and the second region includes a control channel and a shared channel, and wherein the second region includes both downlink symbols and uplink symbols, and wherein the second symbol duration is configurable; and communicating with a user equipment (UE) using the first or second region of the single frame structure of the single carrier. ### Claim 2 (depends on 1) The method of claim 1, further comprising: adjusting a portion of the single frame structure of the single carrier occupied by the second region based at least in part on a latency requirement of the UE. ### Claim 3 (depends on 2) The method of claim 2, wherein the first and second regions are TDM, and wherein adjusting the portion of the single frame structure of the single carrier occupied by the second region comprises: adjusting a time duration or periodicity of the second region. ### Claim 4 (depends on 2) The method of claim 2, wherein the first and second regions are FDM, and wherein adjusting the portion of the single frame structure of the single carrier occupied by the second region comprises: adjusting a bandwidth of the second region. ### Claim 5 (depends on 4) The method of claim 4, further comprising: configuring a guard band between the first and second regions. ### Claim 6 (depends on 1) The method of claim 1, wherein configuring the single frame structure of the single carrier comprises: transmitting a signal in a symbol of the first region, the signal indicative of the second symbol duration and comprising at least one of radio resource control (RRC) signaling, a broadcast message, Layer 1 signaling, or a media access control (MAC) layer signaling. ### Claim 7 (depends on 1) The method of claim 1, further comprising: configuring a third region of the single frame structure of the single carrier, the third region having the second symbol duration, wherein the first and second regions are FDM, and wherein the third region is TDM with the first and second regions. ### Claim 8 (depends on 7) The method of claim 7, further comprising: configuring a guard band between the first and second regions. ### Claim 9 (depends on 1) The method of claim 1, wherein the second symbol duration is shorter than the first symbol duration. ### Claim 10 (depends on 1) The method of claim 1, wherein the shared channel of the first region comprises a first physical downlink shared channel (PDSCH), and the control channel of the first region comprises a first physical downlink control channel (PDCCH); and wherein the shared channel of the second region comprises a second physical downlink shared channel (PDSCH), and the control channel of the second region comprises a second physical downlink control channel (PDCCH). ### Claim 11 (depends on 1) The method of claim 1, wherein the first region has a first bandwidth and wherein the second region has a second bandwidth different from the first bandwidth. ### Claim 12 A method of wireless communication, comprising: identifying a first region of a single frame structure of a single carrier, the first region having a first symbol duration; identifying a second region of the single frame structure of the single carrier, the second region having a second symbol duration different from the first symbol duration, wherein the first and second regions of the single frame structure of the single carrier are time-division multiplexed (TDM) or frequency-division multiplexed (FDM), wherein the first region includes a control channel and a shared channel, and the second region includes a control channel and a shared channel, and wherein the second region includes both downlink symbols and uplink symbols, and wherein the second symbol duration is configurable; and communicating with a base station using the first or second region of the single frame structure of the single carrier. ### Claim 13 (depends on 12) The method of claim 12, wherein the first and second regions are FDM, and wherein the method further comprises: identifying a guard band between the first and second regions. ### Claim 14 (depends on 12) The method of claim 12, wherein identifying the second region of the single frame structure of the single carrier comprises: receiving a signal in a symbol of the first region, the signal indicative of the second symbol duration and comprising at least one of radio resource control (RRC) signaling, a broadcast message, Layer 1 signaling, or a media access control (MAC) layer signaling. ### Claim 15 (depends on 12) The method of claim 12, further comprising: identifying a third region of the single frame structure of the single carrier, the third region having the second symbol duration, wherein the first and second regions are FDM and wherein the third region is TDM with the first and second regions. ### Claim 16 (depends on 15) The method of claim 15, further comprising: identifying a guard band between the first and second regions. ### Claim 17 (depends on 12) The method of claim 12, wherein the second symbol duration is shorter than the first symbol duration. ### Claim 18 (depends on 12) The method of claim 12, wherein the first region has a 15 kHz subcarrier spacing, and the second region has a 60 kHz or 120 kHz subcarrier spacing. ### Claim 19 (depends on 12) The method of claim 12, wherein the first region is a first subframe of the single frame structure, and the second region is a second subframe of the single frame structure that is different than the first subframe; wherein the first subframe comprises a first number of orthogonal frequency division multiplexing (OFDM) symbols, and the second subframe comprises a second number of OFDM symbols that is different from the first number of OFDM symbols; and wherein each of the OFDM symbols in the first subframe have the first symbol duration, and each of the OFDM symbols in the second subframe have the second symbol duration that is different than the first symbol duration. ### Claim 20 (depends on 12) The method of claim 12, wherein the first region has a first bandwidth and wherein the second region has a second bandwidth different from the first bandwidth. ### Claim 21 An apparatus for wireless communication, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions executable by the processor to cause the apparatus to: configure a single frame structure of a single carrier with a first region having a first symbol duration and a second region having a second symbol duration different from the first symbol duration, wherein the first and second regions of the single frame structure of the single carrier are time-division multiplexed (TDM) or frequency-division multiplexed (FDM), wherein the first region includes a control channel and a shared channel, and the second region includes a control channel and a shared channel, and wherein the second region includes both downlink symbols and uplink symbols, and wherein the second symbol duration is configurable; and communicate with a user equipment (UE) using the first or second region of the single frame structure of the single carrier. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the instructions are executable by the processor to cause the apparatus to: adjust a portion of the single frame structure of the single carrier occupied by the second region based at least in part on a latency requirement of the UE. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the first and second regions are TDM, and wherein the instructions are executable by the processor to cause the apparatus to: adjust a time duration or periodicity of the second region. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the first and second regions are FDM, and wherein the instructions are executable by the processor to cause the apparatus to: adjust a bandwidth of the second region. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the instructions are executable by the processor to cause the apparatus to: configure a guard band between the first and second regions. ### Claim 26 (depends on 21) The apparatus of claim 21, wherein the instructions are executable by the processor to cause the apparatus to: transmit a signal in a symbol of the first region, the signal indicative of the second symbol duration and comprising at least one of radio resource control (RRC) signaling, a broadcast message, Layer 1 signaling, or a media access control (MAC) layer signaling. ### Claim 27 (depends on 21) The apparatus of claim 21, wherein the instructions are executable by the processor to cause the apparatus to: configure a third region of the single frame structure of the single carrier, the third region having the second symbol duration, wherein the first and second regions are FDM, and wherein the third region is TDM with the first and second regions. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the instructions are executable by the processor to cause the apparatus to: configure a guard band between the first and second regions. ### Claim 29 (depends on 21) The apparatus of claim 21, wherein the second symbol duration is shorter than the first symbol duration. ### Claim 30 An apparatus for wireless communication, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions executable by the processor to cause the apparatus to: identify a first region of a single frame structure of a single carrier, the first region having a first symbol duration; identify a second region of the single frame structure of the single carrier, the second region having a second symbol duration different from the first symbol duration, wherein the first and second regions of the single frame structure of the single carrier are time-division multiplexed (TDM) or frequency-division multiplexed (FDM), wherein the first region includes a control channel and a shared channel, and the second region includes a control channel and a shared channel, and wherein the second region includes both downlink symbols and uplink symbols, and wherein the second symbol duration is configurable; and communicate with a base station using the first or second region of the single frame structure of the single carrier. ### Claim 31 (depends on 30) The apparatus of claim 30, wherein the first and second regions are FDM, and wherein the instructions are executable by the processor to cause the apparatus to: identify a guard band between the first and second regions. ### Claim 32 (depends on 30) The apparatus of claim 30, wherein the instructions are executable by the processor to cause the apparatus to: receive a signal in a symbol of the first region, the signal indicative of the second symbol duration and comprising at least one of radio resource control (RRC) signaling, a broadcast message, Layer 1 signaling, or a media access control (MAC) layer signaling. ### Claim 33 (depends on 30) The apparatus of claim 30, wherein the instructions are executable by the processor to cause the apparatus to: identify a third region of the single frame structure of the single carrier, the third region having the second symbol duration, wherein the first and second regions are FDM and wherein the third region is TDM with the first and second regions. ### Claim 34 (depends on 33) The apparatus of claim 33, wherein the instructions are executable by the processor to cause the apparatus to: identify a guard band between the first and second regions. ### Claim 35 (depends on 30) The apparatus of claim 30, wherein the second symbol duration is shorter than the first symbol duration.