# US 10,772,113 B2 · Autonomous uplink transmission techniques using shared radio frequency spectrum > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,113 B2 - Document ID: US10772113B2 - Status: Granted - Kind: B2 - Application number: 15/887,277 - Filed: 2018-02-02 - Published: 2018-08-09 - Granted: 2020-09-08 - Earliest claimed: 2017-02-06 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Srinivas Yerramalli; Ahmed Kamel Sadek; Tamer Kadous - Web page: https://patentgrep.com/patent/US10772113B2 ## CPC - H04W 72/1215: {for collaboration of different radio technologies} - H04W 74/0816: with collision avoidance - H04L 1/0026: {Transmission of channel quality indication} - H04L 1/0031: {Multiple signaling transmission (H04L1/1664, F15 take precedence)} - H04L 1/0067: {Rate matching (H04L1/0013 and H04L1/08 take precedence)} - H04L 1/1614: {using bitmaps} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/0078: {Timing of allocation} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/2662: {Symbol synchronisation} - H04W 72/1268: of uplink data flows - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 74/002: {Transmission of channel access control information} - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - 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 autonomous uplink (AUL) transmissions are provided that allow for efficient use of shared radio frequency spectrum band resources. A user equipment (UE) may determine a duration of an AUL transmission and modify an uplink waveform or provide an indication to a base station of one or more channel resources that may be available for base station transmissions, in order to more fully utilize shared radio frequency spectrum band resources within a maximum channel occupancy time (MCOT). A base station may activate or deactivate AUL transmissions through downlink control information (DCI) transmitted to the UE. A UE and base station may exchange various other control information to provide relatively efficient autonomous uplink transmissions and use of the shared radio frequency spectrum band resources. ## Claims ### Claim 1 A method for wireless communication, comprising: contending, at a first transmitting device, for access to a channel of a shared radio frequency spectrum band in accordance with an autonomous uplink configuration which indicates a transmission window available for autonomous uplink transmissions; determining one or more channel access parameters for use by one or more other transmitting devices different from the first transmitting device based at least in part on a duration of an uplink transmission to be transmitted over the channel of the shared radio frequency spectrum band; and transmitting the uplink transmission over the channel of the shared radio frequency spectrum band in accordance with the autonomous uplink configuration, wherein the uplink transmission indicates one or more of the channel access parameters for use by the one or more other transmitting devices. ### Claim 2 (depends on 1) The method of claim 1, wherein the determining one or more channel access parameters for use by the one or more other transmitting devices further comprises: determining a maximum channel occupancy time (MCOT) for the uplink transmission; and determining a difference between the MCOT and the duration of the uplink transmission, and wherein the difference between the MCOT and the duration of the uplink transmission is indicated in the uplink transmission, wherein the difference between the MCOT and the duration of the uplink transmission is indicated in the channel access parameters for use by the one or more other transmitting devices as a number of subframes available for use by the one or more other transmitting devices. ### Claim 3 (depends on 1) The method of claim 1, wherein the autonomous uplink transmissions are unscheduled uplink transmissions in the shared radio frequency spectrum band. ### Claim 4 (depends on 1) The method of claim 1, further comprising: determining the one or more channel access parameters for use by the one or more other transmitting devices based at least in part on a timing advance (TA) for the uplink transmission; and modifying a waveform of the uplink transmission based at least in part on the TA. ### Claim 5 (depends on 4) The method of claim 4, wherein the modifying the waveform comprises: formatting data to be transmitted into the uplink transmission; identifying a timing for starting a subsequent downlink transmission following the uplink transmission and a maximum time gap between the uplink transmission and the subsequent downlink transmission; determining a difference between the maximum time gap and the TA; and puncturing a last symbol of the uplink transmission for a duration of the difference between the maximum time gap and the TA. ### Claim 6 (depends on 4) The method of claim 4, wherein the modifying the waveform comprises: formatting data to be transmitted into the uplink transmission; identifying a timing for starting a subsequent downlink transmission following the uplink transmission and a maximum time gap between the uplink transmission and the subsequent downlink transmission; determining a time difference between an end of a last symbol of the uplink transmission and the maximum time gap; and cyclically extending samples of the last symbol of the uplink transmission to extend for a duration of the difference between the maximum time gap and the TA. ### Claim 7 (depends on 1) The method of claim 1, wherein the determining one or more channel access parameters for use by the one or more other transmitting devices further comprises: determining that a timing advance (TA) for the uplink transmission exceeds a maximum time gap between the uplink transmission and a subsequent downlink transmission, and wherein the TA is indicated in the uplink transmission to allow another transmitting device of the one or more other transmitting devices to transmit a reservation signal for at least a portion of the TA. ### Claim 8 (depends on 1) The method of claim 1, further comprising: identifying uplink control information (UCI) associated with the uplink transmission; and transmitting the UCI in a symbol of the uplink transmission before a last symbol of the uplink transmission. ### Claim 9 (depends on 1) The method of claim 1, further comprising: identifying a time for starting a subsequent downlink transmission following the uplink transmission; and formatting the uplink transmission to occupy the channel of the shared radio frequency spectrum band until the time for starting the subsequent downlink transmission, wherein a transmitter of the subsequent downlink transmission performs a clear channel assessment (CCA) to occupy a maximum time gap between the uplink transmission and the subsequent downlink transmission. ### Claim 10 (depends on 1) The method of claim 1, further comprising: transmitting a time difference between a maximum channel occupancy time (MCOT) and the duration of the uplink transmission to a base station. ### Claim 11 (depends on 10) The method of claim 10, wherein the base station may transmit one or more transmissions during the time difference or the one or more other transmitting devices are precluded from transmitting during the time difference. ### Claim 12 (depends on 1) The method of claim 1, further comprising: determining that additional data is to be transmitted following the transmission window; and transmitting one or more subsequent uplink transmissions after the uplink transmission outside of the transmission window when a maximum channel occupancy time (MCOT) is determined as part of the contending for access to the channel of the shared radio frequency spectrum band. ### Claim 13 (depends on 12) The method of claim 12, wherein a first subframe of a first subsequent uplink transmission of the one or more subsequent uplink transmissions includes control channel information that provides information on the one or more subsequent uplink transmissions. ### Claim 14 An apparatus for wireless communication, comprising: a processor, memory in electronic communication with the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to: contend, at a first transmitting device, for access to a channel of a shared radio frequency spectrum band in accordance with an autonomous uplink configuration which indicates a transmission window available for autonomous uplink transmissions; determine one or more channel access parameters for use by one or more other transmitting devices different from the first transmitting device based at least in part a duration of an uplink transmission to be transmitted over the channel of the shared radio frequency spectrum band; and transmit the uplink transmission over the channel of the shared radio frequency spectrum band in accordance with the autonomous uplink configuration, wherein the uplink transmission indicates one or more of the channel access parameters for use by the one or more other transmitting devices. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the instructions to determine one or more channel access parameters for use by the one or more other transmitting devices are further executable by the processor to cause the apparatus to: determine a maximum channel occupancy time (MCOT) for the uplink transmission; and determine a difference between the MCOT and the duration of the uplink transmission, and wherein the difference between the MCOT and the duration of the uplink transmission is indicated in the uplink transmission, wherein the difference between the MCOT and the duration of the uplink transmission is indicated in the channel access parameters as a number of subframes available for use by the one or more other transmitting devices. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the autonomous uplink transmissions are unscheduled uplink transmissions in the shared radio frequency spectrum band. ### Claim 17 (depends on 14) The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: determine the one or more channel access parameters for use by the one or more other transmitting devices based at least in part on a timing advance (TA) for the uplink transmission; and modify a waveform of the uplink transmission based at least in part on the TA. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the modifying the waveform comprises: format data to be transmitted into the uplink transmission; identify a timing for starting a subsequent downlink transmission following the uplink transmission and a maximum time gap between the uplink transmission and the subsequent downlink transmission; determine a difference between the maximum time gap and the TA; and puncture a last symbol of the uplink transmission for a duration of the difference between the maximum time gap and the TA. ### Claim 19 (depends on 17) The apparatus of claim 17, wherein the modifying the waveform comprises: format data to be transmitted into the uplink transmission; identify a timing for starting a subsequent downlink transmission following the uplink transmission and a maximum time gap between the uplink transmission and the subsequent downlink transmission; determine a time difference between an end of a last symbol of the uplink transmission and the maximum time gap; and cyclically extend samples of the last symbol of the uplink transmission to extend for a duration of the difference between the maximum time gap and the TA. ### Claim 20 (depends on 14) The apparatus of claim 14, wherein the instructions to determine one or more channel access parameters for use by the one or more other transmitting devices are further executable by the processor to cause the apparatus to: determine that a timing advance (TA) for the uplink transmission exceeds a maximum time gap between the uplink transmission and a subsequent downlink transmission, and wherein the TA is indicated in the uplink transmission to allow another transmitting device of the one or more other transmitting devices to transmit a reservation signal for at least a portion of the TA. ### Claim 21 (depends on 14) The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: identify uplink control information (UCI) associated with the uplink transmission; and transmit the UCI in a symbol of the uplink transmission before a last symbol of the uplink transmission. ### Claim 22 (depends on 14) The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: identify a time for starting a subsequent downlink transmission following the uplink transmission; and format the uplink transmission to occupy the channel of the shared radio frequency spectrum band until the time for starting the subsequent downlink transmission, wherein a transmitter of the subsequent downlink transmission performs a clear channel assessment (CCA) to occupy a maximum time gap between the uplink transmission and the subsequent downlink transmission. ### Claim 23 (depends on 14) The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: transmit a time difference between a maximum channel occupancy time (MCOT) and the duration of the uplink transmission to a base station. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the base station may transmit one or more transmissions during the time difference or the one or more other transmitting devices are precluded from transmitting during the time difference. ### Claim 25 (depends on 14) The apparatus of claim 14, wherein the instructions are further executable by the processor to cause the apparatus to: determine that additional data is to be transmitted following the transmission window; and transmit one or more subsequent uplink transmissions after the uplink transmission outside of the transmission window when a maximum channel occupancy time (MCOT) is determined as part of the contending for access to the channel of the shared radio frequency spectrum band. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein a first subframe of a first subsequent uplink transmission of the one or more subsequent uplink transmissions includes control channel information that provides information on the one or more subsequent uplink transmissions. ### Claim 27 An apparatus for wireless communication, comprising: means for contending, at a first transmitting device, for access to a channel of a shared radio frequency spectrum band in accordance with an autonomous uplink configuration which indicates a transmission window available for autonomous uplink transmissions; means for determining one or more channel access parameters for use by one or more other transmitting devices different from the first transmitting device based at least in part on a duration of an uplink transmission to be transmitted over the channel of the shared radio frequency spectrum band; and means for transmitting the uplink transmission over the channel of the shared radio frequency spectrum band in accordance with the autonomous uplink configuration, wherein the uplink transmission indicates one or more of the channel access parameters for use by the one or more other transmitting devices. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the means for determining one or more channel access parameters for use by the one or more other transmitting devices further comprises: means for determining a maximum channel occupancy time (MCOT) for the uplink transmission; and means for determining a difference between the MCOT and the duration of the uplink transmission, and wherein the difference between the MCOT and the duration of the uplink transmission is indicated in the uplink transmission, wherein the difference between the MCOT and the duration of the uplink transmission is indicated in the channel access parameters as a number of subframes available for use by the one or more other transmitting devices. ### Claim 29 (depends on 27) The apparatus of claim 27, wherein the autonomous uplink transmissions are unscheduled uplink transmissions in the shared radio frequency spectrum band. ### Claim 30 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to: contend, at a first transmitting device, for access to a channel of a shared radio frequency spectrum band in accordance with an autonomous uplink configuration which indicates a transmission window available for autonomous uplink transmissions; determine one or more channel access parameters for use by one or more other transmitting devices different from the first transmitting device based at least in part on a duration of an uplink transmission to be transmitted over the channel of the shared radio frequency spectrum band; and transmit the uplink transmission over the channel of the shared radio frequency spectrum band in accordance with the autonomous uplink configuration, wherein the uplink transmission indicates one or more of the channel access parameters for use by the one or more other transmitting devices.