# US 10,771,204 B2 · Half-duplex operation in new radio systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,204 B2 - Document ID: US10771204B2 - Status: Granted - Kind: B2 - Application number: 16/275,056 - Filed: 2019-02-13 - Published: 2019-07-11 - Granted: 2020-09-08 - Earliest claimed: 2017-02-02 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wanshi Chen; Tingfang Ji; Peter Gaal - Web page: https://patentgrep.com/patent/US10771204B2 ## CPC - H04L 5/0012: {Hopping in multicarrier 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 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04L 5/16: Half-duplex systems; Simplex/duplex switching; Transmission of break signals {non-automatically inverting the direction of transmission} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/51: based on terminal or device properties - H04L 5/0028: {Variable division (indication of the divided channel H04L5/0092)} - H04L 5/023: {Multiplexing of multicarrier modulation signals, e.g. multi-user orthogonal frequency division multiple access [OFDMA] (multicarrier modulation H04L27/2601)} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - 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 Methods, systems, and devices for wireless communication are described. A base station may communicate with a user equipment (UE) using frequency resources (e.g., subcarriers) with scalable channel spacing and time resources (e.g., slots) with variable slot durations. The individual slots may include multiple symbols, and each symbol may be allocated for communication in a specific link direction (e.g., uplink, downlink, or sidelink). For UEs configured to operate in a half-duplex mode, the base station may allocate sufficient time for the UE to transition between uplink and downlink configurations. In other cases, for carrier aggregation, the base station may coordinate with the UE to prevent conflicting communications (e.g., simultaneous uplink and downlink transmissions). UEs or other devices may communicate directly with one another in a device-to-device configuration using the same or a similar scheme to allow for half-duplex devices to transition between sending and receiving. ## Claims ### Claim 1 A method for wireless communication at a user equipment (UE), comprising: receiving, from a base station, signaling that indicates a carrier aggregation configuration comprising a first carrier and a second carrier, wherein a numerology or symbol duration within a first slot of the first carrier is different from a numerology or symbol duration within a second slot of the second carrier; identifying a symbol period designated for simultaneous communications in a first link direction on resources of the first carrier and in a second link direction on resources of the second carrier; and communicating on resources of the first carrier or the second carrier during the symbol period based at least in part on a capability of the UE. ### Claim 2 (depends on 1) The method of claim 1, wherein the first link direction comprises one of a downlink, an uplink, or a sidelink, and the second link direction comprises one of a downlink, an uplink or a sidelink, and is different from the first link direction. ### Claim 3 (depends on 1) The method of claim 1, wherein the capability of the UE comprises a capability of the UE to communicate in a half-duplex operating mode, and wherein communicating on resources of the first carrier or the second carrier during the symbol period comprises: communicating on resources of the first carrier or the second carrier during the symbol period based at least in part on the capability of the UE to communicate in the half-duplex operating mode. ### Claim 4 (depends on 1) The method of claim 1, further comprising: refraining from communicating on resources of the first carrier or the second carrier during the symbol period. ### Claim 5 (depends on 1) The method of claim 1, wherein communicating on resources of the first carrier or the second carrier during the symbol period comprises: communicating on resources of the first carrier or the second carrier during the symbol period based at least in part on a cell identity of the first carrier or the second carrier. ### Claim 6 (depends on 5) The method of claim 5, wherein the cell identity indicates at least one of a primary cell (PCell), primary secondary cell (PSCell), or a secondary cell (SCell). ### Claim 7 (depends on 1) The method of claim 1, wherein communicating on resources of the first carrier or the second carrier during the symbol period comprises: communicating on resources of the first carrier or the second carrier during the symbol period based at least in part on a configuration of at least one of the first carrier and the second carrier. ### Claim 8 (depends on 1) The method of claim 1, wherein the simultaneous communications in the first link direction on resources of the first carrier and in the second link direction on resources of the second carrier are within a same frequency band. ### Claim 9 (depends on 1) The method of claim 1, wherein communicating on resources of the first carrier or the second carrier during the symbol period is based at least in part on the numerology or symbol duration of the first carrier and the second carrier. ### Claim 10 (depends on 1) The method of claim 1, wherein the capability of the UE comprises an inability to support both of the simultaneous communications in the first link direction and in the second link direction. ### Claim 11 A method for wireless communication at a base station, comprising: transmitting, to a user equipment (UE), signaling that indicates a carrier aggregation configuration comprising a first carrier and a second carrier, wherein a numerology or symbol duration within a first slot of the first carrier is different from a numerology or symbol duration within a second slot of the second carrier; determining a capability of the UE to communicate on the first carrier and the second carrier; identifying a symbol period designated for simultaneous communications in a first link direction on resources of the first carrier and in a second link direction on resources of the second carrier; and communicating on resources of the first carrier or the second carrier during the symbol period based at least in part on the capability. ### Claim 12 (depends on 11) The method of claim 11, wherein the first link direction comprises one of a downlink, an uplink, or a sidelink, and the second link direction comprises one of a downlink, an uplink or a sidelink, and is different from the first link direction. ### Claim 13 (depends on 11) The method of claim 11, wherein the capability of the UE comprises a capability of the UE to communicate in a half-duplex operating mode, and wherein receiving communications from the UE on resources of the first carrier or the second carrier during the symbol period comprises: communicating on resources of the first carrier or the second carrier during the symbol period based at least in part on the capability of the UE to communicate in the half-duplex operating mode. ### Claim 14 (depends on 11) The method of claim 11, further comprising: transmitting, to the UE, an indication to refrain from communicating on resources of the first carrier or the second carrier during the symbol period. ### Claim 15 (depends on 11) The method of claim 11, wherein communicating on resources of the first carrier or the second carrier during the symbol period comprises: communicating on resources of the first carrier or the second carrier during the symbol period based at least in part on a cell identity of the first carrier or the second carrier. ### Claim 16 (depends on 15) The method of claim 15, wherein the cell identity indicates at least one of a primary cell (PCell), primary secondary cell (PSCell), or a secondary cell (SCell). ### Claim 17 (depends on 11) The method of claim 11, wherein the simultaneous communications in the first link direction on resources of the first carrier and in the second link direction on resources of the second carrier are within a same frequency band. ### Claim 18 (depends on 11) The method of claim 11, wherein communicating on resources of the first carrier or the second carrier during the symbol period is based at least in part on the numerology or symbol duration of the first carrier and the second carrier. ### Claim 19 (depends on 11) The method of claim 11, wherein the capability of the UE comprises an inability to support both of the simultaneous communications in the first link direction and in the second link direction. ### Claim 20 An apparatus for wireless communication at a user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive, from a base station, signaling that indicates a carrier aggregation configuration comprising a first carrier and a second carrier, wherein a numerology or symbol duration within a first slot of the first carrier is different from a numerology or symbol duration within a second slot of the second carrier; identify a symbol period designated for simultaneous communications in a first link direction on resources of the first carrier and in a second link direction on resources of the second carrier; and communicate on resources of the first carrier or the second carrier during the symbol period based at least in part on a capability of the UE. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the first link direction comprises one of a downlink, an uplink, or a sidelink, and the second link direction comprises one of a downlink, an uplink or a sidelink, and is different from the first link direction. ### Claim 22 (depends on 20) The apparatus of claim 20, wherein the capability of the UE comprises a capability of the UE to communicate in a half-duplex operating mode, and wherein the instructions are further executable by the processor to: communicate on resources of the first carrier or the second carrier during the symbol period based at least in part on the capability of the UE to communicate in the half-duplex operating mode. ### Claim 23 (depends on 20) The apparatus of claim 20, wherein the instructions are further executable by the processor to: refrain from communicating on resources of the first carrier or the second carrier during the symbol period. ### Claim 24 (depends on 20) The apparatus of claim 20, wherein the instructions are further executable by the processor to: communicate on resources of the first carrier or the second carrier during the symbol period based at least in part on a cell identity of the first carrier or the second carrier, wherein the cell identity indicates at least one of a primary cell (PCell), primary secondary cell (PSCell), or a secondary cell (SCell). ### Claim 25 (depends on 20) The apparatus of claim 20, wherein the instructions are further executable by the processor to: communicate on resources of the first carrier or the second carrier during the symbol period based at least in part on a configuration of at least one of the first carrier and the second carrier. ### Claim 26 An apparatus for wireless communication at a base station, comprising: a processor; memory coupled 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), signaling that indicates a carrier aggregation configuration comprising a first cell and a second cell, wherein a numerology or symbol duration within a first slot of the first cell is different from a numerology or symbol duration within a second slot of the second cell; determine a capability of the UE to communicate on the first carrier and the second carrier; identify a symbol period designated for simultaneous communications in a first link direction on resources of the first cell and in a second link direction on resources of the second cell; and communicate on resources of the first cell or the second cell during the symbol period based at least in part on the capability. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the first link direction comprises one of a downlink, an uplink, or a sidelink, and the second link direction comprises one of a downlink, an uplink or a sidelink, and is different from the first link direction. ### Claim 28 (depends on 26) The apparatus of claim 26, wherein the capability of the UE comprises a capability of the UE to communicate in a half-duplex operating mode, and wherein the instructions are further executable by the processor to: communicate on resources of the first cell or the second cell during the symbol period based at least in part on the capability of the UE to communicate in the half-duplex operating mode. ### Claim 29 (depends on 26) The apparatus of claim 26, wherein the instructions are further executable by the processor to: transmit, to the UE, an indication to refrain from communicating on resources of the first cell or the second cell during the symbol period. ### Claim 30 (depends on 26) The apparatus of claim 26, wherein the instructions are further executable by the processor to: communicate on resources of the first cell or the second cell during the symbol period based at least in part on a cell identity of the first cell or the second cell, wherein the cell identity indicates at least one of a primary cell (PCell), primary secondary cell (PSCell), or a secondary cell (SCell).