# US 2021/0345280 A1 · Timing advance determination in wireless networks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345280 A1 - Document ID: US20210345280A1 - Status: Published application - Kind: A1 - Application number: 17/367,235 - Filed: 2021-07-02 - Published: 2021-11-04 - Earliest claimed: 2019-01-07 - Assignees: Zte Corporation - Applicants: ZTE Corporation - Inventors: Junfeng ZHANG; Peng HAO - Web page: https://patentgrep.com/patent/US20210345280A1 ## CPC - H04B 7/1851: {Systems using a satellite or space-based relay (H04B7/18508, H04B7/18521 take precedence; providing specific services H04B7/18523 - H04B7/18576)} - H04W 56/0045: {compensating for timing error by altering transmission time} - H04W 56/0005: {synchronizing of arrival of multiple uplinks} - H04W 72/1268: of uplink data flows - G01S 19/02: Details of the space or ground control segments - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/0836: with 2-step access - H04W 74/0838: using contention-free random access [CFRA] - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract Techniques are described to determine timing advance amount. For example, a first device receives, from a second device, a message comprising one or more fields that include information indicative of a communication delay between the first device and the second device. The first device processes the message to use the information for a transmission between the second device and the first device. ## Claims ### Claim 1 A wireless communication method, comprising: receiving, by a first device, from a second device, a message comprising one or more fields that include information indicative of a communication delay between the first device and the second device; and processing the message to use the information for a transmission between the second device and the first device. ### Claim 2 (depends on 1) The method of claim 1, wherein the one or more fields includes a time information received by the first device via a second message using a physical uplink shared channel (PUSCH) scheduled by a first message, wherein the first message precedes the second message, and wherein the first device scrambles control information of the first message using a random-access preamble index and transmits the first message to the second device. ### Claim 3 (depends on 1) The method of claim 1, wherein the one or more fields includes a first timing advance amount which is based on a location of the first device and the second device, and wherein the method further comprises: determining, by the first device, a second timing advance amount based on a reception of a random-access preamble from the second device; and determining, by the first device, a third timing advance amount by combining the first timing advance amount and the second timing advance amount. ### Claim 4 (depends on 1) The method of claim 1, wherein the one or more fields includes a time information associated with transmission or reception by the second device at a specific time during a random access procedure. ### Claim 5 (depends on 1) The method of claim 1, wherein the one or more fields includes one or more parameters to determine a time information associated with transmission or reception by the second device at a specific time during a random access procedure, and wherein the one or more parameters includes index information at the specific time corresponding to any one or more of a radio frame, a subframe, a time slot, and a symbol, and wherein the time information associated with transmission or reception by the second device is determined by: determining, using the one or more parameters, a transmission time information associated with a time when the second device sends a second message using a physical uplink shared channel (PUSCH), or determining, using the one or more parameters, a reception time information associated with a time when the second device receives a first message that precedes the second message. ### Claim 6 (depends on 1) The method of claim 1, wherein the one or more fields includes a location information of the second device, and wherein the method further comprises: determining, by the first device, a timing advance amount based on the location information of the second device. ### Claim 7 (depends on 1) The method of claim 1, wherein the first device is included in a satellite that orbits earth. ### Claim 8 A wireless communication method, comprising: transmitting, by a second device, to a first device, a message comprising one or more fields that include information indicative of a communication delay between the second device and the first device. ### Claim 9 (depends on 8) The method of claim 8, wherein the one or more fields includes a time information received by the first device via a second message transmitted by the second device using a physical uplink shared channel (PUSCH) scheduled by a first message, wherein the first message precedes the second message, or wherein the one or more fields includes a time information transmitted by the second device during a random access procedure, or wherein the one or more fields includes a time information from a traffic channel bearer after completion of the random access procedure. ### Claim 10 (depends on 8) The method of claim 8, wherein the one or more fields includes a first timing advance amount which is based on a location of the first device and the second device. ### Claim 11 (depends on 8) The method of claim 8, wherein the one or more fields includes a time information associated with transmission or reception by the second device at a specific time during a random access procedure. ### Claim 12 (depends on 8) The method of claim 8, wherein the one or more fields includes one or more parameters to determine a time information associated with transmission or reception by the second device at a specific time during a random access procedure, and wherein the one or more parameters includes index information at the specific time corresponding to any one or more of a radio frame, a subframe, a time slot, and a symbol. ### Claim 13 A first device for wireless communication comprising a processor, configured to implement a method comprising: receive from a second device, a message comprising one or more fields that include information indicative of a communication delay between the first device and the second device; and process the message to use the information for a transmission between the second device and the first device. ### Claim 14 (depends on 13) The first device of claim 13, wherein the one or more fields includes a time information received by the first device via a second message using a physical uplink shared channel (PUSCH) scheduled by a first message, wherein the first message precedes the second message, and wherein the processor of the first device is configured to scramble control information of the first message using a random-access preamble index and transmits the first message to the second device. ### Claim 15 (depends on 13) The first device of claim 13, wherein the one or more fields includes a first timing advance amount which is based on a location of the first device and the second device, and wherein the processor of the first device is further configured to: determine a second timing advance amount based on a reception of a random-access preamble from the second device; and determine a third timing advance amount by combining the first timing advance amount and the second timing advance amount. ### Claim 16 (depends on 13) The first device of claim 13, wherein the one or more fields includes a time information associated with transmission or reception by the second device at a specific time during a random access procedure. ### Claim 17 A second device for wireless communication comprising a processor, configured to implement a method comprising: transmit, to a first device, a message comprising one or more fields that include information indicative of a communication delay between the second device and the first device. ### Claim 18 (depends on 17) The second device of claim 17, wherein the one or more fields includes a time information received by the first device via a second message configured to be transmitted by the second device using a physical uplink shared channel (PUSCH) scheduled by a first message, wherein the first message precedes the second message, or wherein the one or more fields includes a time information configured to be transmitted by the second device during a random access procedure, or wherein the one or more fields includes a time information from a traffic channel bearer after completion of the random access procedure. ### Claim 19 (depends on 17) The second device of claim 17, wherein the one or more fields includes a first timing advance amount which is based on a location of the first device and the second device. ### Claim 20 A system, comprising: a second device configured to: transmit to a first device, a message comprising one or more fields that include information indicative of a communication delay between the second device and the first device; and the first device is configured to: receive the message sent by the second device; and process the message to use the information for a transmission between the second device and the first device.