# US 11,909,505 B2 · User equipment parameter determination method and apparatus, and storage medium and base station > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,505 B2 - Document ID: US11909505B2 - Status: Granted - Kind: B2 - Application number: 17/271,867 - Filed: 2019-07-18 - Published: 2021-06-24 - Granted: 2024-02-20 - Earliest claimed: 2018-08-31 - Assignees: Spreadtrum Communications (Shanghai) Co., Ltd. - Applicants: Spreadtrum Communications (Shanghai) Co., Ltd. - Inventors: Xiangxin Gu - Web page: https://patentgrep.com/patent/US11909505B2 ## CPC - H04B 7/18519: {Operations control, administration or maintenance} - H04W 56/0045: {compensating for timing error by altering transmission time} - H04B 7/19: Earth-synchronous stations - H04W 56/005: {compensating for timing error by adjustment in the receiver} - H04W 56/006: {using known positions of transmitter and receiver} - H04W 56/0065: {using measurement of signal travel time} - H04W 56/009: {Closed loop measurements} - H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract UE parameter determination method and apparatus, storage medium and base station are provided. The method includes: determining a minimum round trip time between each UE in a cell and a satellite; determining frame information of a network-side uplink radio frame based on the minimum round trip time and frame information of a network-side downlink radio frame, where the minimum round trip time is a timing difference by which the network-side uplink radio frame lags behind the network-side downlink radio frame; and determining a UE parameter of each UE based on the network-side uplink radio frame and the network-side downlink radio frame, where UE parameter includes at least one of TA or K2. By the method, an NTN network can be supported on the premise that modification of software and hardware of a terrestrial network UE is minimized, thereby effectively avoiding extra maintenance cost of software and hardware. ## Claims ### Claim 1 A User Equipment (UE) parameter determination method, comprising: determining, by a base station, a minimum round trip time between each UE in a cell and a satellite, wherein the minimum round trip time is a timing difference by which a network-side uplink radio frame lags behind a network-side downlink radio frame; determining, by the base station, frame information of the network-side uplink radio frame based on the minimum round trip time and frame information of the network-side downlink radio frame; and determining, by the base station, a UE parameter of each UE based on the network-side uplink radio frame and the network-side downlink radio frame, where the UE parameter comprises at least one of Timing Advance (TA) or K2, wherein K2 is a time period from a slot where an uplink resource carrying Uplink (UL) grant indication information is located to a slot where a resource of a UL grant is located; wherein the UE parameter comprises TA, and said determining, by the base station, the UE parameter of each UE based on the network-side uplink radio frame and the network-side downlink radio frame comprises: determining the TA by deducting the minimum round trip time from a round trip time, wherein the round trip time is determined based on a random access preamble received when the UE performs random access. ### Claim 2 (depends on 1) The UE parameter determination method according to claim 1, wherein determining the minimum round trip time between each UE in the cell and the satellite comprises: determining the minimum round trip time between each UE in the cell and the satellite based on an altitude of the satellite. ### Claim 3 (depends on 2) The UE parameter determination method according to claim 2, wherein the minimum round trip time is counted by time slot, and is obtained by rounding down over time slot; or, the minimum round trip time is counted by subframe, and is obtained by rounding down over subframe. ### Claim 4 (depends on 2) The UE parameter determination method according to claim 2, wherein the minimum round trip time is transparent to each UE. ### Claim 5 (depends on 1) The UE parameter determination method according to claim 1, wherein the minimum round trip time is counted by time slot, and is obtained by rounding down over time slot; or, the minimum round trip time is counted by subframe, and is obtained by rounding down over subframe. ### Claim 6 (depends on 1) The UE parameter determination method according to claim 1, wherein the minimum round trip time is transparent to each UE. ### Claim 7 (depends on 1) The UE parameter determination method according to claim 1, wherein the UE parameter is TA, and determining the UE parameter of each UE based on the network-side uplink radio frame and the network-side downlink radio frame comprises: receiving an uplink signal from each UE; and calculating the TA of each UE based on the uplink signal, the network-side downlink radio frame and the network-side uplink radio frame. ### Claim 8 (depends on 1) The UE parameter determination method according to claim 1, wherein the UE parameter is K2, and determining the UE parameter of each UE based on the network-side uplink radio frame and the network-side downlink radio frame comprises: when performing uplink scheduling for each UE, calculating the K2 of each UE based on the network-side uplink radio frame and the network-side downlink radio frame. ### Claim 9 (depends on 1) A non-transitory storage medium having computer instructions stored therein, wherein when the computer instructions are executed, the User Equipment (UE) parameter determination method of claim 1 is performed. ### Claim 10 (depends on 1) A base station comprising a memory and a processor, wherein the memory has computer instructions stored therein, and when the processor executes the computer instructions, the User Equipment (UE) parameter determination method of claim 1 is performed. ### Claim 11 A User Equipment (UE) parameter determination apparatus mounted on a base station, comprising: a first determining circuitry configured to determine a minimum round trip time between each UE in a cell and a satellite, wherein the minimum round trip time is a timing difference by which a network-side uplink radio frame lags behind a network-side downlink radio frame; a second determining circuitry configured to determine frame information of the network-side uplink radio frame based on the minimum round trip time and frame information of the network-side downlink radio frame; and a third determining circuitry configured to determine a UE parameter of each UE based on the network-side uplink radio frame and the network-side downlink radio frame, where the UE parameter comprises at least one of Timing Advance (TA) or K2, wherein K2 is a time period from a slot where an uplink resource carrying Uplink (UL) grant indication information is located to a slot where a resource of a UL grant is located; wherein the UE parameter comprises TA, and the third determining circuitry is configured to: determine the TA by deducting the minimum round trip time from a round trip time, wherein the round trip time is determined based on a random access preamble received when the UE performs random access. ### Claim 12 (depends on 11) The UE parameter determination apparatus according to claim 11, wherein the first determining circuitry comprises: a determining sub-circuitry configured to determine the minimum round trip time between each UE in the cell and the satellite based on an altitude of the satellite. ### Claim 13 (depends on 12) The UE parameter determination apparatus according to claim 12, wherein the minimum round trip time is counted by time slot, and is obtained by rounding down over time slot; or, the minimum round trip time is counted by subframe, and is obtained by rounding down over subframe. ### Claim 14 (depends on 12) The UE parameter determination apparatus according to claim 12, wherein the minimum round trip time is transparent to each UE. ### Claim 15 (depends on 11) The UE parameter determination apparatus according to claim 11, wherein the minimum round trip time is counted by time slot, and is obtained by rounding down over time slot; or, the minimum round trip time is counted by subframe, and is obtained by rounding down over subframe. ### Claim 16 (depends on 11) The UE parameter determination apparatus according to claim 11, wherein the minimum round trip time is transparent to each UE. ### Claim 17 (depends on 11) The UE parameter determination apparatus according to claim 11, wherein the UE parameter is TA, and the third determining circuitry comprises: a receiving sub-circuitry configured to receive an uplink signal from each UE; and a first calculating sub-circuitry configured to calculate the TA of each UE based on the uplink signal, the network-side downlink radio frame and the network-side uplink radio frame. ### Claim 18 (depends on 11) The UE parameter determination apparatus according to claim 11, wherein the UE parameter is K2, and the third determining circuitry comprises: a second calculating sub-circuitry configured to: when uplink scheduling is performed for each UE, calculate the K2 of each UE based on the network-side uplink radio frame and the network-side downlink radio frame.