# US 2019/0174489 A1 · Uplink Signal Starting Position in a Wireless Device and Wireless Network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174489 A1 - Document ID: US20190174489A1 - Status: Published application - Kind: A1 - Application number: 16/266,939 - Filed: 2019-02-04 - Published: 2019-06-06 - Earliest claimed: 2016-05-06 - Assignees: Comcast Cable Communications, LLC - Applicants: Comcast Cable Communications, LLC - Inventors: Esmael Hejazi Dinan - Web page: https://patentgrep.com/patent/US20190174489A1 ## CPC - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 74/0816: with collision avoidance - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A wireless device may receive one or more messages comprising configuration parameters of a licensed assisted access (LAA) cell. The wireless device may receive downlink control information (DCI) for the LAA cell. The DCI may comprise a first field and a second field. The first field may indicate uplink resources for an uplink subframe of the LAA cell. The second field may indicate a first starting position in a plurality of starting positions in the uplink subframe. The first starting position in the uplink subframe may be determined, at least, based on a sum of a listen-before-talk (LBT) period and a timing advance value. The wireless device may generate one or more transport blocks employing the DCI. The wireless device may transmit the one or more transport blocks in the uplink resources starting from the starting position of the uplink subframe. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, one or more messages comprising configuration parameters of a licensed assisted access (LAA) cell; receiving downlink control information (DCI) for the LAA cell, wherein the DCI comprises: a first field indicating uplink resources for an uplink subframe of the LAA cell; and a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value; generating one or more transport blocks based on the DCI; and transmitting, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks. ### Claim 2 (depends on 1) The method of claim 1, wherein the second field indicates a value of a plurality of values associated with determining the starting position of the uplink subframe. ### Claim 3 (depends on 2) The method of claim 2, wherein the plurality of values comprises: a first value associated with a beginning of symbol zero of the uplink subframe; a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe; a third value associated with a number of microseconds after the beginning of symbol zero of the uplink subframe, wherein the number of microseconds is based on twenty-five micro-seconds plus a timing advance; and a fourth value associated with a beginning of symbol one of the uplink subframe. ### Claim 4 (depends on 1) The method of claim 1, wherein the LBT period is twenty-five micro-seconds. ### Claim 5 (depends on 1) The method of claim 1, further comprising determining the starting position of the uplink subframe, wherein the timing advance value is associated with uplink transmission by the wireless device. ### Claim 6 (depends on 1) The method of claim 1, wherein the second field comprises two bits of information. ### Claim 7 (depends on 1) The method of claim 1, further comprising, performing, by the wireless device, an LBT process for the LBT period. ### Claim 8 (depends on 1) The method of claim 1, wherein the uplink subframe starts earlier than a downlink subframe by the timing advance value. ### Claim 9 (depends on 1) The method of claim 1, wherein the wireless device is configured to not transmit uplink signals on the LAA cell during a gap period before the starting position. ### Claim 10 (depends on 1) The method of claim 1, further comprising receiving, by the wireless device, a full downlink subframe in a subframe preceding the uplink subframe. ### Claim 11 (depends on 1) The method of claim 1, further comprising receiving, by the wireless device, a partial downlink subframe in a subframe preceding the uplink subframe. ### Claim 12 (depends on 1) The method of claim 1, wherein the DCI is dedicated DCI. ### Claim 13 (depends on 1) The method of claim 1, further comprising: receiving, by the wireless device, a timing advance command comprising the timing advance value; and adjusting uplink transmission timing for one or more uplink channels based on the timing advance value. ### Claim 14 A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to: receive one or more messages comprising configuration parameters of a licensed assisted access (LAA) cell; receive downlink control information (DCI) for the LAA cell, wherein the DCI comprises: a first field indicating uplink resources for an uplink subframe of the LAA cell; and a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value; generate one or more transport blocks based on the DCI; and transmit, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks. ### Claim 15 (depends on 14) The wireless device of claim 14, wherein the second field indicates a value of a plurality of values associated with determining the starting position of the uplink subframe. ### Claim 16 (depends on 15) The wireless device of claim 15, wherein the plurality of values comprises: a first value associated with a beginning of symbol zero of the uplink subframe; a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe; a third value associated with twenty-five micro-seconds plus at least one microsecond after the beginning of symbol zero of the uplink subframe; and a fourth value associated with a beginning of symbol one of the uplink subframe. ### Claim 17 (depends on 14) The wireless device of claim 14, wherein the LBT period is twenty-five micro-seconds. ### Claim 18 (depends on 14) The wireless device of claim 14, wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the starting position of the uplink subframe, wherein the timing advance value is associated with uplink transmission by the wireless device. ### Claim 19 (depends on 14) The wireless device of claim 14, wherein the second field comprises two bits of information. ### Claim 20 (depends on 14) The wireless device of claim 14, wherein the instructions, when executed by the one or more processors, further cause the wireless device to perform an LBT process for the LBT period. ### Claim 21 (depends on 14) The wireless device of claim 14, wherein the uplink subframe starts earlier than a downlink subframe by the timing advance value. ### Claim 22 (depends on 14) The wireless device of claim 14, wherein the instructions, when executed by the one or more processors, further cause the wireless device to not transmit uplink signals on the LAA cell during a gap period before the starting position. ### Claim 23 (depends on 14) The wireless device of claim 14, wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive a full downlink subframe in a subframe preceding the uplink subframe. ### Claim 24 (depends on 14) The wireless device of claim 14, wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive a partial downlink subframe in a subframe preceding the uplink subframe. ### Claim 25 (depends on 14) The wireless device of claim 14, wherein the DCI is dedicated DCI. ### Claim 26 (depends on 14) The wireless device of claim 14, wherein the instructions, when executed by the one or more processors, further cause the wireless device to: receive a timing advance command comprising the timing advance value; and adjust uplink transmission timing for one or more uplink channels based on the timing advance value. ### Claim 27 A system comprising: a base station comprising: one or more processors; and memory storing first instructions that, when executed by the one or more processors of the base station, cause the base station to: transmit one or more messages comprising configuration parameters of a licensed assisted access (LAA) cell; and transmit downlink control information (DCI) for the LAA cell, wherein the DCI comprises: a first field indicating uplink resources for an uplink subframe of the LAA cell; and a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value; and a wireless device comprising: one or more processors; and memory storing second instructions that, when executed by the one or more processors of the wireless device, cause the wireless device to: generate one or more transport blocks based on the DCI; and transmit, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks. ### Claim 28 (depends on 27) The system of claim 27, wherein the second field indicates a value of a plurality of values associated with determining the starting position of the uplink subframe. ### Claim 29 (depends on 28) The system of claim 28, wherein the plurality of values comprises: a first value associated with a beginning of symbol zero of the uplink subframe; a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe; a third value associated with twenty-five micro-seconds plus at least one microsecond after the beginning of symbol zero of the uplink subframe; and a fourth value associated with a beginning of symbol one of the uplink subframe. ### Claim 30 (depends on 27) The system of claim 27, wherein the LBT period is twenty-five micro-seconds. ### Claim 31 (depends on 27) The system of claim 27, wherein the second instructions, when executed by the one or more processors of the wireless device, further cause the wireless device to determine the starting position of the uplink subframe, wherein the timing advance value is associated with uplink transmission by the wireless device. ### Claim 32 (depends on 27) The system of claim 27, wherein the second field comprises two bits of information. ### Claim 33 (depends on 27) The system of claim 27, wherein the second instructions, when executed by the one or more processors of the wireless device, further cause the wireless device to perform an LBT process for the LBT period. ### Claim 34 (depends on 27) The system of claim 27, wherein the uplink subframe starts an amount of time earlier than a downlink subframe, wherein the amount of time corresponds to the timing advance value. ### Claim 35 (depends on 27) The system of claim 27, wherein the second instructions, when executed by the one or more processors, further cause the wireless device to not transmit uplink signals on the LAA cell during a gap period before the starting position. ### Claim 36 (depends on 27) The system of claim 27, wherein the second instructions, when executed by the one or more processors of the wireless device, further cause the wireless device to receive a full downlink subframe in a subframe preceding the uplink subframe. ### Claim 37 (depends on 27) The system of claim 27, wherein the second instructions, when executed by the one or more processors of the wireless device, further cause the wireless device to receive a partial downlink subframe in a subframe preceding the uplink subframe. ### Claim 38 (depends on 27) The system of claim 27, wherein the DCI is dedicated DCI. ### Claim 39 (depends on 27) The system of claim 27, wherein the second instructions, when executed by the one or more processors of the wireless device, further cause the wireless device to: receive a timing advance command comprising the timing advance value; and adjust uplink transmission timing for one or more uplink channels based on the timing advance value.