# US 12,004,089 B2 · Power spectral density limits for regions of a coverage area in a satellite communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,089 B2 - Document ID: US12004089B2 - Status: Granted - Kind: B2 - Application number: 17/450,210 - Filed: 2021-10-07 - Published: 2022-09-22 - Granted: 2024-06-04 - Earliest claimed: 2021-03-17 - Assignees: Hughes Network Systems, LLC - Applicants: Rajeev Oza; Suresh Korada; Guy Montgomery - Inventors: Rajeev Oza; Suresh Korada; Guy Montgomery - Web page: https://patentgrep.com/patent/US12004089B2 ## CPC - H04W 52/346: {distributing total power among users or channels} - 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 4/029: Location-based management or tracking services - H04W 52/283: {Power depending on the position of the mobile} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract A system and method for providing terminals with permitted power spectral density (PSD) limits for regions of a coverage area including: dividing a coverage area into regions, each region having a boundary; assigning a PSD limit to each region; receiving a location of a transmitting entity; determining a transmitting entity region from the regions based on the location; and transmitting with a respective PSD limit of the transmitting entity region. ## Claims ### Claim 1 A non-transient computer-readable storage medium having instructions embodied thereon, the instructions being executable by one or more processors to perform a method for providing a power spectral density (PSD) limit, the method comprising: assigning a PSD limit and a boundary to regions of a coverage area of a satellite; determining a terminal region from the regions based on a location of a terminal; setting a terminal PSD limit to the PSD limit associated with the terminal region; receiving a periodic location update at a centralized beam selector (CBS); determining the terminal PSD limit and a beam selection; providing the terminal PSD limit and the beam selection to the terminal; and transmitting a burst from the terminal, wherein a PSD of the burst is less than or equal to the terminal PSD limit. ### Claim 2 (depends on 1) The method of claim 1, wherein the boundary is defined with polygons. ### Claim 3 (depends on 1) The method of claim 1, wherein the boundary coincides with country boundaries and water bodies. ### Claim 4 (depends on 1) The method of claim 1, wherein multiple regions of the regions are disposed within country boundaries and water bodies. ### Claim 5 (depends on 1) The method of claim 1, wherein one of the regions comprises a no-transmit region due to the assigned PSD limit of the no-transmit region. ### Claim 6 (depends on 1) The method of claim 1, wherein a first region of the regions is enclosed by a second region of the regions, and the setting sets the terminal PSD limit of the terminal as the PSD limit associated with the first region. ### Claim 7 (depends on 1) The method of claim 1, wherein the terminal is one or more of an aeronautical, maritime, land mobile, or other mobile terminal. ### Claim 8 (depends on 1) The method of claim 1, wherein the determining comprises performing a point-in-polygon test on the location. ### Claim 9 (depends on 1) The method of claim 1, wherein the determining comprises estimating the location based on metrics of a RF transmission from the terminal. ### Claim 10 (depends on 1) The method of claim 1, wherein the determining comprises receiving the location from the terminal. ### Claim 11 (depends on 1) The method of claim 1, further comprising sending the terminal PSD limit to a terminal. ### Claim 12 (depends on 1) The method of claim 1, wherein the determining is performed by a gateway comprising a Centralized Beam Selector (CBS). ### Claim 13 (depends on 1) The method of claim 1, wherein the determining is performed by the terminal. ### Claim 14 (depends on 1) The method of claim 1, wherein the determining is based on a characteristic of the terminal selected from one or more of a heading, a speed, a beam definition plan version, an antenna directivity, a radome, a skew angle, and a terminal identification. ### Claim 15 (depends on 1) The method of claim 1, further comprising calculating a particular PSD for the terminal from the terminal PSD limit, wherein the calculating is based on a feedback from an antenna, wherein the feedback comprises one or more of an antenna directivity, a radome loss and a skew angle, and wherein the setting sets the terminal PSD limit to the particular PSD. ### Claim 16 (depends on 15) The method of claim 15, further comprising receiving the feedback at a performed by a gateway comprising a Centralized Beam Selector (CBS), wherein the determining determines the PSD limit based on the particular PSD. ### Claim 17 (depends on 1) The method of claim 1, further comprising selecting a beam of the satellite for the terminal to use based on the terminal region. ### Claim 18 (depends on 1) The method of claim 1, wherein a beam of the satellite spans multiple regions of the regions, and an availability of the beam for the terminal to use is based on the terminal region. ### Claim 19 (depends on 1) The method of claim 1, wherein the boundary coincides with country boundaries and water bodies. ### Claim 20 (depends on 1) The method of claim 1, wherein the determining comprises performing a point-in-polygon test on the location.