# US 2018/0323863 A1 · Low latency satellite communication relay network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323863 A1 - Document ID: US20180323863A1 - Status: Published application - Kind: A1 - Application number: 15/971,224 - Filed: 2018-05-04 - Published: 2018-11-08 - Earliest claimed: 2017-05-05 - Assignees: Via Space Networks Inc. - Applicants: Via Space Networks Inc. - Inventors: Patrick Bournes - Web page: https://patentgrep.com/patent/US20180323863A1 ## CPC - H04B 7/18513: {Transmission in a satellite or space-based system} - H04B 7/18508: {with satellite system used as relay, i.e. aeronautical mobile satellite service} - H04B 7/18521: {Systems of inter linked satellites, i.e. inter satellite service (for optical links between satellites H04B10/118)} - H04B 7/195: Non-synchronous stations - H04B 10/118: specially adapted for satellite communication - H04B 7/18541: {for handover of resources} - H04B: TRANSMISSION ## Abstract Methods and systems for free space communication comprising one or more satellites that may provide a continuous communication link between two or more terminals are disclosed. A first satellite may be configured to send and/or receive data signals from a first terminal through a first link, and a second satellite may be configured to send and/or receive data from a second terminal through a second link. The first satellite and the second satellite may be coupled through a crosslink. The satellites and the terminals may be positioned at a minimum latitude threshold in order to take advantage of the decreasing circumference of the earth at increasing latitudes. The system and the method may comprise dividing the communication pathway between into a plurality of smaller segments, which when linked together approximate an optimal pathway for low latency and enable maintaining of higher bandwidth between the two terminals. ## Claims ### Claim 1 A communication system, comprising: one or more satellites disposed in one or more orbital planes, wherein the satellites are disposed at a fixed distance interval and a fixed altitude interval; at least two terminals positioned at end sections of a plurality of satellites, wherein the terminals are located at or above a predetermined minimum latitude, wherein the earth's circumference is inversely proportional to latitude, wherein the plurality of satellites are configured to provide bi-directional communication between the two terminals, wherein data transmission between the terminals is based solely on geographic data of the terminals; an optimal pathway comprising at least one of a straight line and a theoretical pathway; and a machine-generated boundary box comprising maximum and minimum latitudes and maximum and minimum longitudes of a satellite within which data transmission between the terminals is permitted. ### Claim 2 (depends on 1) The communication system of claim 1, further comprising: wherein the optimal pathway is determined based on transmitting and receiving satellites' position and orientation, distance, and electromagnetic visibility. ### Claim 3 (depends on 1) The communication system of claim 1, further comprising: wherein the straight line comprises an arc between the terminals that does not intersect the surface of the earth. ### Claim 4 (depends on 1) The communication system of claim 1, further comprising: wherein the theoretical pathway comprises a plurality of line segments and at least one vertex, and wherein the vertex comprises a change in direction of the theoretical pathway. ### Claim 5 (depends on 1) The communication system of claim 1, further comprising: wherein the theoretical pathway is the shortest distance between the terminals based on at least one of a geography data and a topology data of the earth. ### Claim 6 (depends on 1) The communication system of claim 1, further comprising: wherein the theoretical pathway travels in the east or the west direction when it is highest in latitude. ### Claim 7 (depends on 1) The communication system of claim 1, further comprising: wherein size of the boundary box is inversely proportional to total number of satellites in the system. ### Claim 8 (depends on 1) The communication system of claim 1, further comprising: wherein longitudinal boundaries of the boundary box remain constant throughout the optimal pathway. ### Claim 9 A communication system, comprising: a constellation of satellites fixed in position and orientation disposed in a plurality of orbital planes, wherein the constellation is configured to provide coverage between two terminals by directing data north or south above a predetermined latitude for minimizing a distance between the two terminals, wherein data transmission between the terminals does not comprise at least one of a processing and an analysis of the data; an optimal pathway comprising at least one of a straight line and a theoretical pathway; an algorithm-generated boundary box within which transmission between the terminals is permitted, and wherein an area of the boundary box comprises all possible communication pathways permitted that approximates the optimal pathway. ### Claim 10 (depends on 9) The communication system of claim 9, further comprising: wherein the straight line is the shortest distance between the terminals. ### Claim 11 (depends on 9) The communication system of claim 9, further comprising: wherein the theoretical pathway comprises a change in north-south direction that is greater than the change in east-west direction when it is below a minimum threshold latitude, and wherein the theoretical pathway comprises a change in east-west direction that is greater than the change in north-south direction when it is above the minimum threshold latitude. ### Claim 12 (depends on 9) The communication system of claim 9, further comprising: wherein the predetermined latitude is 45-degrees. ### Claim 13 (depends on 9) The communication system of claim 9, further comprising: wherein edges surrounding the boundary box comprise maximum latitudes and longitudes permitted in a communication pathway. ### Claim 14 (depends on 9) The communication system of claim 9, further comprising: wherein latitude edges of the boundary box decrease and approach the optimal pathway when additional satellites are added to the constellation. ### Claim 15 (depends on 9) The communication system of claim 9, further comprising: wherein multiple alternate pathways transmit overlapping data between the terminals for preventing a gap in transmission and a confirmation of data. ### Claim 16 A communication system, comprising: a first satellite communicatively coupled to a first terminal through a first link; a second satellite communicatively coupled to a second terminal through a second link, wherein the first satellite is communicatively coupled to the second satellite through a crosslink configured to provide bi-directional communication between the first terminal and the second terminal, wherein data transmission between the terminals does not comprise converting to an electrical signal, wherein the first satellite forms a new connection with the second satellite prior to dropping a previous connection for maintaining continuous connectivity; an optimal pathway comprising at least one of a straight line and a theoretical pathway, wherein the first satellite and the second satellite are configured to arrive along the optimal pathway at a predetermined time interval; and a boundary box within which data transmission between the terminals is permitted. ### Claim 17 (depends on 16) The communication system of claim 16, further comprising: wherein an actual pathway taken is the most accurate approximation of the optimal pathway at any given time. ### Claim 18 (depends on 16) The communication system of claim 16, further comprising: wherein accuracy of an approximation of the optimal pathway is directly proportional to an amount of satellite in the constellation. ### Claim 19 (depends on 16) The communication system of claim 16, further comprising: wherein the theoretical pathway travels generally in the north or south directions when it is below a predetermined latitude, and wherein the theoretical pathway travels generally in the east or west directions when it is above the predetermined latitude. ### Claim 20 (depends on 16) The communication system of claim 16, further comprising: wherein the size of the boundary box is dynamic based on constellation size.