# US 10,485,020 B2 · Techniques for uplink transmission management > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,485,020 B2 - Document ID: US10485020B2 - Status: Granted - Kind: B2 - Application number: 16/256,779 - Filed: 2019-01-24 - Published: 2019-05-23 - Granted: 2019-11-19 - Earliest claimed: 2015-05-14 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Madhavan Srinivasan Vajapeyam; Aleksandar Damnjanovic; Tao Luo; Wanshi Chen; Peter Gaal - Web page: https://patentgrep.com/patent/US10485020B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04W 72/1268: of uplink data flows - H04W 74/004: {in the uplink, i.e. towards network} - H04W 74/04: Scheduled access (hybrid access H04W74/02) - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Techniques for uplink transmission management in a wireless communications system are described herein. An example method may include receiving an explicit uplink grant that indicates one or more implicit uplink grants. In an aspect, the example method may include performing a first clear channel assessment (CCA) in response to the explicit uplink grant in a first time slot. In another aspect, the example method may include, if the first CCA fails, sequentially performing one or more additional CCAs respectively in one or more time slots subsequent to the first time slot in response to the one or more implicit uplink grants, and transmitting the PDU over the unlicensed or shared spectrum and in a time slot subsequent to the time slot in which one of the one or more additional CCAs succeeds. ## Claims ### Claim 1 A method of wireless communication, comprising: receiving an uplink grant, said uplink grant scheduling multiple time slots for uplink transmission over a shared spectrum; performing clear channel assessment (CCA) sequentially for the multiple time slots, starting with a first time slot of the multiple time slots, until the CCA succeeds for a particular time slot of the multiple time slots; and transmitting data in the particular time slot over the shared spectrum. ### Claim 2 (depends on 1) The method of claim 1, wherein the multiple time slots are consecutive in time. ### Claim 3 (depends on 1) The method of claim 1, wherein the CCA for a time slot of the multiple time slots is performed in another time slot immediately before the time slot. ### Claim 4 (depends on 1) The method of claim 1, further comprising: transmitting the data in at least one of the multiple time slots subsequent to the particular time slot. ### Claim 5 (depends on 1) The method of claim 1, wherein the uplink grant is received from a primary cell. ### Claim 6 (depends on 1) The method of claim 1, wherein the data is transmitted over a secondary cell in the shared spectrum. ### Claim 7 (depends on 1) The method of claim 1, wherein the data comprise a medium access control (MAC) protocol data unit (PDU). ### Claim 8 A user equipment (UE), comprising: a memory configured to store instructions; and at least one processor coupled to the memory, the at least one processor and the memory are configured to execute the instructions to: receive an uplink grant, said uplink grant scheduling multiple time slots for uplink transmission over a shared spectrum; perform clear channel assessment (CCA) sequentially for the multiple time slots, starting with a first time slot of the multiple time slots, until the CCA succeeds for a particular time slot of the multiple time slots; and transmit data in the particular time slot over the shared spectrum. ### Claim 9 (depends on 8) The UE of claim 8, wherein the multiple time slots are consecutive in time. ### Claim 10 (depends on 8) The UE of claim 8, wherein the CCA for a time slot of the multiple time slots is performed in another time slot immediately before the time slot. ### Claim 11 (depends on 8) The UE of claim 8, wherein the at least one processor and the memory are further configured to: transmit the data in at least one of the multiple time slots subsequent to the particular time slot. ### Claim 12 (depends on 8) The UE of claim 8, wherein the uplink grant is received from a primary cell. ### Claim 13 (depends on 8) The UE of claim 8, wherein the data is transmitted over a secondary cell in the shared spectrum. ### Claim 14 (depends on 8) The UE of claim 8, wherein the data comprise a medium access control (MAC) protocol data unit (PDU). ### Claim 15 An apparatus of wireless communication, comprising: means for receiving an uplink grant, said uplink grant scheduling multiple time slots for uplink transmission over a shared spectrum; means for performing clear channel assessment (CCA) sequentially for the multiple time slots, starting with a first time slot of the multiple time slots, until the CCA succeeds for a particular time slot of the multiple time slots; and means for transmitting data in the particular time slot over the shared spectrum. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the multiple time slots are consecutive in time. ### Claim 17 (depends on 15) The apparatus of claim 15, wherein the CCA for a time slot of the multiple time slots is performed in another time slot immediately before the time slot. ### Claim 18 (depends on 15) The apparatus of claim 15, further comprising: means for transmitting the data in at least one of the multiple time slots subsequent to the particular time slot. ### Claim 19 A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising codes executable for a user equipment (UE) to perform: receiving an uplink grant, said uplink grant scheduling multiple time slots for uplink transmission over a shared spectrum; performing clear channel assessment (CCA) sequentially for the multiple time slots, starting with a first time slot of the multiple time slots, until the CCA succeeds for a particular time slot of the multiple time slots; and transmitting data in the particular time slot over the shared spectrum. ### Claim 20 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the multiple time slots are consecutive in time. ### Claim 21 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the CCA for a time slot of the multiple time slots is performed in another time slot immediately before the time slot. ### Claim 22 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the instructions further comprise: codes for transmitting the data in at least one of the multiple time slots subsequent to the particular time slot.