# US 2021/0242935 A1 · Communication of satellite information for non-terrestrial networks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242935 A1 - Document ID: US20210242935A1 - Status: Published application - Kind: A1 - Application number: 17/154,497 - Filed: 2021-01-21 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Iyab Issam Sakhnini; Jun Ma; Qiang Wu; Xiao Feng Wang; Dan Zhang; Huilin Xu - Web page: https://patentgrep.com/patent/US20210242935A1 ## CPC - H04B 7/18513: {Transmission in a satellite or space-based system} - H04B 7/18543: {for adaptation of transmission parameters, e.g. power control (for detecting or preventing errors in the information received H04L1/00)} - H04B 7/0617: {for beam forming} - H04B 7/18519: {Operations control, administration or maintenance} - H04B 7/1855: {using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification} - H04B 7/18563: {Arrangements for interconnecting multiple systems (data switching networks H04L12/00)} - H04W 48/12: using downlink control channel - H04W 52/143: {Downlink power control} - H04W 68/005: {Transmission of information for alerting of incoming communication} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 52/146: {Uplink power control} - H04W 52/42: in systems with time, space, frequency or polarisation diversity - 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 This disclosure provides systems, methods and apparatus for communicating a satellite behavior change. In one aspect, a satellite identifies a satellite behavior change to occur for the satellite of a non-terrestrial network for cellular communications. The apparatus also signals the satellite behavior change to a user equipment serviced by the satellite. In another aspect, a user equipment obtains, from a satellite servicing the user equipment, a signaling of a satellite behavior change to occur for the satellite. The user equipment also adjusts one or more user equipment parameters for cellular communication based on the obtained signaling. The satellite behavior change may include a satellite attitude or a transmit power or coverage area of one or more satellite beams. The user equipment parameters may include satellite or beam selection or reselection to listen to paging information, satellite or beam handover parameters, or transmit power control parameters. ## Claims ### Claim 1 An apparatus for wireless communications at a satellite, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: identify a satellite behavior change to occur for a satellite of a non-terrestrial network for cellular communications; format the satellite behavior change to be sent in a dedicated signaling between a user equipment (UE) and the satellite, or in one or more system information blocks (SIBs), or both; and signal, by the satellite, the satellite behavior change to the UE based at least in part on the formatting. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the satellite behavior change includes a change in one or more of: a satellite attitude; a transmit power of one or more satellite beams; or a coverage area of one or more satellite beams. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein signaling the satellite behavior change includes indicating a start time of the satellite behavior change, a time duration of the satellite behavior change, or both. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein signaling the satellite behavior change includes indicating a start location of the satellite behavior change, an end location of the satellite behavior change, or both. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein signaling the satellite behavior change includes outputting contents of a vector or table, wherein the contents include a satellite identification and one or more of: a satellite attitude adjustment and a time or satellite location associated with the satellite attitude adjustment; a transmit power adjustment and a time or satellite location associated with the transmit power adjustment; or a beam coverage adjustment and a time or satellite location associated with the beam coverage adjustment. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: restrict signaling of the satellite behavior change to a defined period of time before the satellite behavior change is to occur. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: identify one or more neighboring satellite behavior changes to occur for one or more neighboring satellites of the non-terrestrial network for cellular communications; and signal, by the satellite, the one or more neighboring satellite behavior changes along with signaling the satellite behavior change. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: indicate to the UE, in a SIB1, a scheduling of information for the satellite behavior change to be output. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the SIB1 indicates whether the information for the satellite behavior change is to be output periodically by the satellite and one or more parameters of a periodicity of the output. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the one or more SIBs indicate a satellite ephemeris. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: restrict outputting the information for the satellite behavior change in the one or more SIBs to a defined period of time before the satellite behavior change is to occur. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the instructions are further executable by the processor to cause the apparatus to: transmit one or more paging messages to the UE, the one or more paging messages indicating that one or more SIBs including the information for the satellite behavior change are to be output to the UE. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to signal one or more neighboring satellite behavior changes in the one or more SIBs, wherein: the signaling of the satellite behavior change be in a first set of SIBs of the one or more SIBs; and the signaling of the one or more neighboring satellite behavior changes be in a second set of SIBs of the one or more SIBs. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the dedicated signaling is sent during a connected mode between the satellite and the UE. ### Claim 15 A method for wireless communications at a satellite, comprising: identifying a satellite behavior change to occur for a satellite of a non-terrestrial network for cellular communications; formatting the satellite behavior change to be sent in a dedicated signaling between a user equipment (UE) and the satellite, or in one or more system information blocks (SIBs), or both; and signaling, by the satellite, the satellite behavior change to the UE based at least in part on the formatting. ### Claim 16 An apparatus for wireless communications at a user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: obtain, from a satellite servicing the UE, a signaling of a satellite behavior change to occur for the satellite, wherein the satellite is included in a non-terrestrial network for cellular communications; and adjust one or more UE parameters based on the obtained signaling, wherein the one or more UE parameters are associated with satellite or beam selection and reselection, handover of the UE, transmit power control, or any combination thereof. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the satellite behavior change comprises one or more of: a satellite attitude; a transmit power of one or more satellite beams; or a coverage area of one or more satellite beams. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the signaling of the satellite behavior change includes indicating a start time of the satellite behavior change, a time duration of the satellite behavior change, or both. ### Claim 19 (depends on 17) The apparatus of claim 17, wherein the signaling of the satellite behavior change includes indicating a start location of the satellite behavior change, an end location of the satellite behavior change, or both. ### Claim 20 (depends on 16) The apparatus of claim 16, wherein the satellite behavior change further includes: a satellite attitude adjustment and a time or satellite location associated with the satellite attitude adjustment; a transmit power adjustment and a time or satellite location associated with the transmit power adjustment; or a beam coverage adjustment and a time or satellite location associated with the beam coverage adjustment. ### Claim 21 (depends on 16) The apparatus of claim 16, wherein the instructions are further executable by the processor to cause the apparatus to: obtain, from the satellite, signaling of one or more neighboring satellite behavior changes to occur for one or more neighboring satellites of the non-terrestrial network for cellular communications. ### Claim 22 (depends on 16) The apparatus of claim 16, wherein obtaining the signaling of the satellite behavior change includes obtaining information for the satellite behavior change in one or more system information blocks (SIBs) from the satellite. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to: obtain an indication, in a SIB1 from the satellite, information for the satellite behavior change to be obtained. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the SIB1 indicates whether the information for the satellite behavior change is to be output periodically by the satellite and one or more parameters of a periodicity of the output. ### Claim 25 (depends on 22) The apparatus of claim 22, wherein the obtained information for the satellite behavior change is included in a SIB defined to indicate a satellite ephemeris. ### Claim 26 (depends on 22) The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to: obtain one or more paging messages from the satellite, the one or more paging messages indicating that one or more SIBs including the information for the satellite behavior change are to be output by the satellite. ### Claim 27 (depends on 22) The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to: obtain the one or more neighboring satellite behavior changes in the one or more SIBs, wherein the signaling of the satellite behavior change be in a first set of SIBs of the one or more SIBs and the signaling of the one or more neighboring satellite behavior changes be in a second set of SIBs of the one or more SIBs. ### Claim 28 (depends on 16) The apparatus of claim 16, wherein obtaining the satellite behavior change is in a dedicated signaling between the satellite and the UE. ### Claim 29 (depends on 28) The apparatus of claim 28, wherein the dedicated signaling is during a connected mode between the satellite and the UE. ### Claim 30 A method for wireless communications at a user equipment (UE), comprising: obtaining, from a satellite servicing the UE, a signaling of a satellite behavior change to occur for the satellite, wherein the satellite is included in a non-terrestrial network for cellular communications; and adjusting one or more UE parameters based on the obtained signaling, wherein the one or more UE parameters are associated with satellite or beam selection and reselection, handover of the UE, transmit power control, or any combination thereof.