# US 10,485,027 B2 · Uplink short transmission techniques using contention-based 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 10,485,027 B2 - Document ID: US10485027B2 - Status: Granted - Kind: B2 - Application number: 15/410,640 - Filed: 2017-01-19 - Published: 2017-08-03 - Granted: 2019-11-19 - Earliest claimed: 2016-02-02 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Siddhartha Mallik; Taesang Yoo; Jing Sun; Xiaoxia Zhang; Aleksandar Damnjanovic - Web page: https://patentgrep.com/patent/US10485027B2 ## CPC - H04W 74/0816: with collision avoidance - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/12: Wireless traffic scheduling - H04W 74/02: Hybrid access - 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) ## Abstract Uplink short transmissions (ULSTs) may be configured in a wireless communications system to be transmitted in configured uplink resources within a listen-before-talk (LBT) frame or within a ULST window during which a user equipment (UE) may transmit a ULST and during which the base station may monitor for ULSTs. A UE having an amount of data to be transmitted that is less than a threshold value may transmit the data in the ULST, and avoid the need to have the base station allocate separate uplink resources outside of the configured uplink resources or the ULST window. ## Claims ### Claim 1 A method of wireless communication at a user equipment (UE), comprising: identifying data to be transmitted to a base station; initiating a timer based at least in part on identifying the data; monitoring for one or more downlink transmissions from the base station, the one or more downlink transmissions indicating scheduled uplink resources allocated for uplink short transmissions (ULSTs); performing a ULST associated with the identified data using the scheduled uplink resources upon detection of the one or more downlink transmissions from the base station before expiration of the timer; and initiating, after expiration of the timer and in an absence of the one or more downlink transmissions being detected before expiration of the timer, a listen-before talk (LBT) procedure during a ULST window. ### Claim 2 (depends on 1) The method of claim 1, further comprising: initiating the timer after identifying the data to be transmitted to the base station; and terminating the timer in response to detection of the one or more downlink transmissions from the base station. ### Claim 3 (depends on 1) The method of claim 1, wherein the monitoring for the one or more downlink transmissions comprises: monitoring for a downlink preamble associated with an LBT frame. ### Claim 4 (depends on 3) The method of claim 3, wherein the scheduled uplink resources are determined based at least in part on the downlink preamble. ### Claim 5 (depends on 3) The method of claim 3, wherein the scheduled uplink resources comprise resources of an uplink subframe associated with the LBT frame. ### Claim 6 (depends on 5) The method of claim 5, wherein the scheduled uplink resources comprise one or more of semi-statically configured uplink resources of one or more uplink subframes of the LBT frame, predefined uplink resources of a first uplink subframe of the LBT frame, or dynamically configured resources identified in the downlink preamble. ### Claim 7 (depends on 1) The method of claim 1, wherein initiating the LBT procedure further comprises: identifying resources within the ULST window for performing the ULST associated with the identified data. ### Claim 8 (depends on 7) The method of claim 7, wherein the identified resources within the ULST window for performing the ULST associated with the identified data are semi-statically configured resources. ### Claim 9 (depends on 7) The method of claim 7, wherein the identified resources within the ULST window for performing the ULST associated with the identified data are received in a system information block (SIB) from the base station. ### Claim 10 (depends on 1) The method of claim 1, wherein the LBT procedure is initiated outside of an LBT frame. ### Claim 11 (depends on 1) The method of claim 1, wherein the ULST associated with the identified data comprises a scheduling request (SR) or a random access request to schedule uplink resources for uplink transmission of the identified data. ### Claim 12 (depends on 1) The method of claim 1, further comprising: determining that the identified data is less than a size threshold; and including the identified data in the ULST. ### Claim 13 A method of wireless communication comprising: transmitting one or more downlink transmissions associated with a listen-before-talk (LBT) frame to one or more user equipment (UE), the one or more downlink transmissions indicating scheduled uplink resources allocated for uplink short transmissions (ULSTs); configuring a ULST window that is at least partially non-overlapping with the LBT frame; configuring the one or more UEs with a timer for monitoring for the one or more downlink transmissions; and configuring the one or more UEs to initiate an LBT procedure during the ULST window in an absence of detecting the one or more downlink transmissions prior to expiration of the timer; and monitoring for a ULST from the one or more UEs during the ULST window. ### Claim 14 (depends on 13) The method of claim 13, further comprising: scheduling uplink resources in one or more uplink subframes of the LBT frame; and configuring the one or more UEs to transmit the ULST during the scheduled uplink resources upon detecting the one or more downlink transmissions prior to expiration of the timer. ### Claim 15 (depends on 14) The method of claim 14, wherein the one or more downlink transmissions comprise a downlink preamble, and wherein the scheduled uplink resources are determined based at least in part on the downlink preamble. ### Claim 16 (depends on 14) The method of claim 14, wherein the scheduled uplink resources comprise resources of an uplink subframe associated with the LBT frame. ### Claim 17 (depends on 16) The method of claim 16, wherein the scheduled uplink resources comprise one or more of semi-statically configured uplink resources of one or more uplink subframes of the LBT frame, predefined uplink resources of a first uplink subframe of the LBT frame, or dynamically configured resources identified in a downlink preamble. ### Claim 18 (depends on 13) The method of claim 13, wherein configuring the ULST window comprises: configuring resources within the ULST window for uplink transmissions. ### Claim 19 (depends on 18) The method of claim 18, wherein the configured resources within the ULST window configured for uplink transmissions are semi-statically configured resources. ### Claim 20 (depends on 18) The method of claim 18, wherein configuring the ULST window further comprises: transmitting a system information block (SIB) to the one or more UEs with the ULST window and the configured resources within the ULST window configured for uplink transmissions. ### Claim 21 (depends on 13) The method of claim 13, wherein the ULST comprises one or more of a scheduling request (SR) or a random access request to schedule uplink resources for one or more subsequent uplink transmissions. ### Claim 22 (depends on 13) The method of claim 13, further comprising: configuring a size threshold for transmitting user data in the ULST during the ULST window. ### Claim 23 An apparatus for wireless communication, comprising: a processor; memory in communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: identify data to be transmitted to a base station; initiate a timer based at least in part on identifying the data; monitor for one or more downlink transmissions from the base station, the one or more downlink transmissions indicating scheduled uplink resources allocated for uplink short transmissions (ULSTs); perform a ULST associated with the identified data using the scheduled uplink resources upon detection of the one or more downlink transmission from the base station before expiration of the timer; and initiate, after expiration of the timer and in an absence of the one or more downlink transmissions being detected before expiration of the timer, a listen-before talk (LBT) procedure during a ULST window. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the instructions are operable to cause the processor to: initiate the timer after identifying the data to be transmitted to the base station; and terminate the timer in response to detection of the one or more downlink transmissions from the base station. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein the instructions are operable to cause the processor to: identify resources within the ULST window for performing the ULST associated with the identified data. ### Claim 26 (depends on 23) The apparatus of claim 23, wherein the instructions are operable to cause the processor to: determine that the identified data is less than a size threshold; and include the identified data in the ULST. ### Claim 27 An apparatus for wireless communication, comprising: a processor; memory in communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: transmit one or more downlink transmissions associated with a listen-before-talk (LBT) frame to one or more user equipment (UE), the one or more downlink transmissions indicating scheduled uplink resources allocated for uplink short transmissions (UL S Ts); configure a ULST window that is at least partially non-overlapping with the LBT frame; configure the one or more UEs with a timer for monitoring for the one or more downlink transmissions; and configure the one or more UEs to initiate an LBT procedure during the ULST window in an absence of detecting the one or more downlink transmissions prior to expiration of the timer; and monitor for a ULST from the one or more UEs during the ULST window. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the instructions are operable to cause the processor to: schedule uplink resources in one or more uplink subframes of the LBT frame; and configure the one or more UEs to transmit the ULST during the scheduled uplink resources upon detecting the one or more downlink transmissions prior to expiration of the timer.