# US 2019/0173611 A1 · Techniques and apparatuses for avoiding collisions on an uplink data channel and a cell-specific or ue-specific uplink control channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173611 A1 - Document ID: US20190173611A1 - Status: Published application - Kind: A1 - Application number: 16/130,877 - Filed: 2018-09-13 - Published: 2019-06-06 - Earliest claimed: 2017-12-04 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Chih-Hao LIU; Srinivas YERRAMALLI; Tamer KADOUS - Web page: https://patentgrep.com/patent/US20190173611A1 ## CPC - H04L 1/0013: {Rate matching, e.g. puncturing or repetition of code symbols} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - 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 Some techniques and apparatuses described herein may be used to avoid or reduce collisions between uplink data communications and uplink control communications for an enhanced machine-type communication user equipment (eMTC UE) operating in an unlicensed radio frequency spectrum band. Furthermore, some techniques and apparatuses may avoid such collision while still allowing efficient use of resources, such as by deferring the uplink data communication within a data segment, rate matching an uplink data communication around uplink control resources (e.g., cell-specific uplink control resources and/or UE-specific uplink control resources), puncturing the uplink data communication to avoid the uplink control resources, multiplexing uplink control information on an uplink data channel, and/or the like. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: determining one or more first resource elements to be used for a cell-specific uplink control channel associated with acknowledging or negatively acknowledging initial network setup messages in an unlicensed radio frequency spectrum band; determining that the one or more first resource elements are scheduled to collide with one or more second resource elements scheduled for the UE for an uplink data transmission on an uplink data channel, wherein the uplink data transmission includes an initial uplink data transmission and one or more repetitions of the initial uplink data transmission; and modifying the uplink data transmission based at least in part on determining that the one or more first resource elements are scheduled to collide with the one or more second resource elements. ### Claim 2 (depends on 1) The method of claim 1, wherein modifying the uplink data transmission comprises deferring the uplink data transmission. ### Claim 3 (depends on 2) The method of claim 2, wherein the uplink data transmission is deferred based at least in part on receiving an indication that the uplink data transmission is to be deferred. ### Claim 4 (depends on 2) The method of claim 2, wherein the uplink data transmission is deferred within a data segment or a frame in which the one or more second resource elements are scheduled based at least in part on a determination that a number of subsequent uplink segments in the data segment or the frame satisfies a threshold, wherein the subsequent uplink segments are subsequent to the one or more second resource elements. ### Claim 5 (depends on 1) The method of claim 1, wherein modifying the uplink data transmission comprises rate matching or puncturing the uplink data transmission to avoid the one or more first resource elements. ### Claim 6 (depends on 5) The method of claim 5, wherein the uplink data transmission is rate matched or punctured based at least in part on receiving an indication that the uplink data transmission is to be rate matched or punctured. ### Claim 7 (depends on 5) The method of claim 5, wherein the uplink data transmission is rate matched or punctured based at least in part on a determination that a number of subsequent uplink segments in a data segment or a frame, in which the one or more second resource elements are scheduled, does not satisfy a threshold, wherein the subsequent uplink segments are subsequent to the one or more second resource elements. ### Claim 8 (depends on 1) The method of claim 1, wherein the one or more first resource elements of the cell-specific uplink control channel are signaled in a system information block. ### Claim 9 (depends on 1) The method of claim 1, wherein the UE is a machine-type communication device that operates in the unlicensed radio frequency spectrum band. ### Claim 10 A method of wireless communication performed by a user equipment (UE), comprising: determining one or more first resource elements to be used for a UE-specific uplink control channel associated with acknowledging or negatively acknowledging, by the UE, downlink data communications in an unlicensed radio frequency spectrum band; determining that the one or more first resource elements are scheduled to collide with one or more second resource elements scheduled for the UE for an uplink data transmission on an uplink data channel, wherein the uplink data transmission includes an initial uplink data transmission and one or more repetitions of the initial uplink data transmission; and deferring transmission of the uplink data transmission on the uplink data channel or multiplexing uplink control information (UCI) on the one or more second resource elements of the uplink data channel based at least in part on determining that the one or more first resource elements are scheduled to collide with the one or more second resource elements. ### Claim 11 (depends on 10) The method of claim 10, wherein the uplink data transmission is deferred based at least in part on receiving an indication that multiplexing of the UCI on the uplink data channel is to be disabled. ### Claim 12 (depends on 10) The method of claim 10, wherein the UCI is multiplexed on the one or more second resource elements of the uplink data channel based at least in part on receiving an indication that multiplexing of the UCI on the uplink data channel is to be enabled. ### Claim 13 (depends on 10) The method of claim 10, wherein the uplink data transmission is rate matched or punctured around the one or more second resource elements on which the UCI is multiplexed. ### Claim 14 (depends on 10) The method of claim 10, wherein the UCI is multiplexed on the one or more second resource elements of the uplink data channel based at least in part on a first number of repetitions configured for the UCI and a second number of repetitions configured for the uplink data transmission. ### Claim 15 (depends on 14) The method of claim 14, wherein the UCI is transmitted on a number of subframes equal to the first number when the first number is less than or equal to the second number. ### Claim 16 (depends on 14) The method of claim 14, wherein a beta factor, that controls a number of resource elements used for the UCI, is adjusted when the first number is greater than the second number. ### Claim 17 (depends on 16) The method of claim 16, wherein the beta factor is scaled by a factor equal to the first number divided by the second number. ### Claim 18 (depends on 10) The method of claim 10, wherein the one or more first resource elements of the UE-specific uplink control channel are signaled in a radio resource control configuration message. ### Claim 19 (depends on 10) The method of claim 10, wherein the UE is a machine-type communication device that operates in an unlicensed radio frequency spectrum band. ### Claim 20 A user equipment (UE) for wireless communication, comprising: memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: determine one or more first resource elements to be used for a cell-specific uplink control channel associated with acknowledging or negatively acknowledging initial network setup messages in an unlicensed radio frequency spectrum band; determine that the one or more first resource elements are scheduled to collide with one or more second resource elements scheduled for the UE for an uplink data transmission on an uplink data channel, wherein the uplink data transmission includes an initial uplink data transmission and one or more repetitions of the initial uplink data transmission; and modify the uplink data transmission based at least in part on determining that the one or more first resource elements are scheduled to collide with the one or more second resource elements. ### Claim 21 (depends on 20) The UE of claim 20, wherein the uplink data transmission is modified by deferring the uplink data transmission. ### Claim 22 (depends on 21) The UE of claim 21, wherein the uplink data transmission is deferred based at least in part on receiving an indication that the uplink data transmission is to be deferred. ### Claim 23 (depends on 20) The UE of claim 20, wherein the uplink data transmission is modified by rate matching or puncturing the uplink data transmission to avoid the one or more first resource elements. ### Claim 24 (depends on 23) The UE of claim 23, wherein the uplink data transmission is rate matched or punctured based at least in part on receiving an indication that the uplink data transmission is to be rate matched or punctured. ### Claim 25 A user equipment (UE) for wireless communication, comprising: memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: determine one or more first resource elements to be used for a UE-specific uplink control channel associated with acknowledging or negatively acknowledging, by the UE, downlink data communications in an unlicensed radio frequency spectrum band; determine that the one or more first resource elements are scheduled to collide with one or more second resource elements scheduled for the UE for an uplink data transmission on an uplink data channel, wherein the uplink data transmission includes an initial uplink data transmission and one or more repetitions of the initial uplink data transmission; and defer transmission of the uplink data transmission on the uplink data channel or multiplex uplink control information (UCI) on the one or more second resource elements of the uplink data channel based at least in part on determining that the one or more first resource elements are scheduled to collide with the one or more second resource elements. ### Claim 26 (depends on 25) The UE of claim 25, wherein the uplink data transmission is deferred based at least in part on receiving an indication that multiplexing of the UCI on the uplink data channel is to be disabled. ### Claim 27 (depends on 25) The UE of claim 25, wherein the UCI is multiplexed on the one or more second resource elements of the uplink data channel based at least in part on receiving an indication that multiplexing of the UCI on the uplink data channel is to be enabled. ### Claim 28 (depends on 25) The UE of claim 25, wherein the uplink data transmission is rate matched or punctured around the one or more second resource elements on which the UCI is multiplexed. ### Claim 29 (depends on 25) The UE of claim 25, wherein the UCI is multiplexed on the one or more second resource elements of the uplink data channel based at least in part on a first number of repetitions configured for the UCI and a second number of repetitions configured for the uplink data transmission. ### Claim 30 (depends on 29) The UE of claim 29, wherein the UCI is transmitted on a number of subframes equal to the first number when the first number is less than or equal to the second number.