WO2017017100A1 - Communication par satellite - Google Patents

Communication par satellite Download PDF

Info

Publication number
WO2017017100A1
WO2017017100A1 PCT/EP2016/067798 EP2016067798W WO2017017100A1 WO 2017017100 A1 WO2017017100 A1 WO 2017017100A1 EP 2016067798 W EP2016067798 W EP 2016067798W WO 2017017100 A1 WO2017017100 A1 WO 2017017100A1
Authority
WO
WIPO (PCT)
Prior art keywords
satellite
ground
link
air
wireless
Prior art date
Application number
PCT/EP2016/067798
Other languages
English (en)
Inventor
Graham Peters
Simon Watts
Original Assignee
Avanti Communications Group Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avanti Communications Group Plc filed Critical Avanti Communications Group Plc
Publication of WO2017017100A1 publication Critical patent/WO2017017100A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/118—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18578—Satellite systems for providing broadband data service to individual earth stations

Definitions

  • This disclosure relates to satellite communications, and in particular to
  • satellite-based internet access can even be used as an alternative to ground-based links in regions that do have a developed communication
  • FIG. 1 gives a schematic overview of a satellite communication system 100, which is suitable for providing access to a network.
  • the network is an internet 102 i.e. a wide area internetwork such as that commonly referred to as the Internet (capital I).
  • the system 100 comprises a gateway Earth station (gateway) 104, a satellite 110 in orbit about the Earth (labelled "E” in various figures), and one or more client systems 112 remote from the gateway 104 and located in a region on the Earth's surface to which internet access is being provided.
  • the gateway 104 comprises a satellite hub 103 connected to the internet 102, and at least one gateway antenna 106 connected to the hub 103.
  • Each of the client systems comprises an antenna 114, connected to a satellite modem 420.
  • the satellite 110 is arranged to be able to communicate wirelessly with the hub 103 of the satellite gateway 104 via the gateway antenna 106, and with the modems 420 of the client systems 112 via the antennae 114, and thereby provide a satellite link 107 for transmitting internet traffic between the source or destination on the internet 102 and the client systems 112.
  • the satellite link 107, hub 103 and modems 420 may operate on the Ka microwave band (26.5 to 40 GHz).
  • the satellite link 107 comprises a forward link 107F for transmitting traffic originating with an internet source to the client systems 112, and a return link 107R for transmitting traffic originating with the client systems 112 to an internet destination.
  • the hub 103 serves (i.e.
  • the gateway may comprise multiple such hubs, each serving a respective subset of client systems.
  • the operator of the satellite 110 and/or gateway 104 provides
  • the client systems 112 may comprise a central satellite gateway run by the ISP (the satellite gateway comprising an antenna 114 and modem 420), and a local communication infrastructure providing access onwards to the equipment of a plurality of users within the region in question.
  • the local communication infrastructure may comprise a relatively short range wireless technology or a local wired infrastructure, connecting onwards to home or business routers or individual user devices.
  • the client systems 112 may comprise individual, private user terminals each with its own satellite antenna 114 and modem 420 for connecting to the satellite 110 and local access point for connecting to one or more respective user devices.
  • the ISP does not necessarily provide any extra infrastructure, but acts as a broker for the bandwidth provided by the satellite 110.
  • an individual femtocell or picocell could be located in each home or business, each connecting to a respective one or more user devices using a short range wireless technology, e.g. a local RF technology such as Wi-Fi.
  • the satellite 110 is deployed in a short range wireless technology, e.g. a local RF technology such as Wi-Fi.
  • FIG. 2 shows South Africa as an example, but this could equally be any other country or region within any one or more countries (e.g. a state, county or province, or some other non-politically defined region).
  • the satellite 110 may be configured as a spot-beam satellite for example using directional antennae or based on a beam-forming technology, so that the communications between the satellite 110 and the client equipment 112 in the covered region 200 are divided amongst a plurality of spatially distinct beams 202 ("user beams").
  • a beam refers to a volume of space or "lobe" in which transmission and/or reception of one or more given signals are approximately confined, typically a signal cone.
  • Each beam 202 is directed in a different respective direction such that beams are arranged into a cluster, each beam covering a different respective (sub) area on the Earth's surface within the region 200 in question (though the areas covered by the beams 202 may be arranged to overlap somewhat to avoid gaps in coverage).
  • This is a way of increasing capacity, as the limited frequency band of the satellite 110 (e.g. Ka band) can be re-used separately in different beams 202 - i.e. it provides a form of directional spatial division multiplexing (though adjacent beams may still use different bands or sub-bands, especially if they overlap in space).
  • Figure 2 shows five beams 202a-202e which between them approximately cover the area of South Africa, but it will be appreciated that other numbers and/or sizes of beam are also possible.
  • a factor which limits the overall capacity of the system 100 is communication between the satellite 110 and the gateway 104.
  • a single gateway does not provide the same opportunity for spatial multiplexing in the way that multiple client systems distributed over a relatively wide geographic area do.
  • all user beams 202 need to be served from the gateway 104 using the limited spectrum available for transmissions between the gateway 104 and the satellite 110.
  • the bandwidth of the leg of the satellite link 107 between the gateway 104 and the satellite 110 that becomes the factor that limits overall capacity. This is true for transmissions in both directions i.e. from the client system(s) 112 to the gateway 104 via the satellite 110, and from the gateway 104 to the client system(s) 112 via the satellite 110.
  • a satellite communication system In a first aspect of the present invention, a satellite communication system
  • a support structure supporting a wireless interface at an elevation above cloud level, whereby the wireless interface has a line of sight to a satellite which remains substantially unobstructed by cloud, wherein Earth and/or its atmosphere provides an upward force on the support structure to maintain said elevation;
  • ground station connected to the wireless interface by a ground-to-air communication link between the ground station and the wireless interface
  • the wireless interface is configured to relay data bearing signals between the ground-to-air communication link and a wireless air-to-satellite
  • a direct, wireless ground-to-satellite communication link is provided between a ground station, such as a gateway, and a satellite.
  • a ground station such as a gateway
  • a satellite In conventional satellite communication systems, such as the one described above, a direct, wireless ground-to-satellite communication link is provided between a ground station, such as a gateway, and a satellite.
  • the possible configurations of such a single ground-to-satellite link are limited, and generally only an RF (Radio Frequency) link is viable, RF meaning radio waves with frequencies between about 3kHZ and 300GHz (these are administrated by WARC), satellite communications are typically between 1 GHz and 60GHz. Operating at frequencies significantly above this soon requires the use of multiple geographically separate locations, due to disruption by cloud in Earth's atmosphere.
  • RF Radio Frequency
  • the present invention instead provides two, series communication links between the ground station and the satellite - a ground-to-air link and a separate air-to-satellite link, connected in series via the elevated wireless interface.
  • the wireless interface performs any necessary signal conversion to effect the relaying.
  • the support structure is an aircraft such as an aerostat (i.e. a balloon, or other aircraft that maintains its elevation primarily through buoyancy), in particular a high-altitude platform (HAP).
  • a HAP is a quasi-stationary aircraft capable of remaining in the air at high altitudes, between about 12 and 25km depending on climactic region, for hours, days or even month or years at a time, and can for instance take the form of a balloon, airship or aeroplane. It can be manned or unmanned. In this case, the upward force to counteract gravity and maintain the necessary elevation is provided by Earth's atmosphere together with the HAP's engines.
  • the wireless air-to-satellite link may operate in a visible and/or infrared spectrum, for example in the near-infrared spectrum. In some environments, the near UV spectrum may also be useable.
  • the interface is a laser-communication interface, whereby the air-to-satellite wireless link a laser link, for instance operating in a visible and/or infrared spectrum. That is, whereby data is borne by (e.g. visible and/or infrared) laser signals transmitted to and/or received from the satellite by the laser-based interface, having been modulated onto them using suitable modulation.
  • Cloud level means the maximum altitude reached by opaque cloud in the local environment at any time, opaque meaning opaque to any electromagnetic signals transmitted via the wireless air-to-satellite link, for example opaque to infrared and/or visible signals in embodiments. Over time, the elevation of the highest clouds present in the local environment will vary, but will do so without ever exceeding cloud level as the term is defined herein.
  • the ground-to-air link may be wireless, or it may be wired i.e. provided by a communication cable connecting the ground station and the support structure, which is tethered to the ground.
  • a communication cable connecting the ground station and the support structure, which is tethered to the ground.
  • using the tether to send signals minimises the amount of equipment required on the elevated support structure e.g. HAP.
  • a direct, wireless ground-to-satellite communication link may operate in parallel with the ground-to-air link. That is, two communication paths between the satellite and the same ground station may be provided: the first being a conventional radio link directly to the satellite, and the second being via the elevated support structure e.g. HAP.
  • the ground station may comprise a ground- level wireless interface (i.e. on Earth's surface) configured to provide such a direct wireless ground-to-satellite communication link between the ground station and the or another satellite.
  • "Direct" wireless link in this context means that are no
  • signal processing entities i.e. wireless signals are sent between the satellite and the ground station through the air/vacuum without interception or (intentional) modification.
  • This is in contrast to the combination of the ground-to-air and air-to-satellite links, which together constitute an indirect ground-to-satellite communication link due to the deliberate interception of signals by the elevated wireless interface.
  • the conventional wireless ground-to-satellite link i.e. the direct communications path between the satellite and ground station (e.g. via a gateway antenna) may operate in a lower frequency spectrum than the wireless air-to-satellite link, i.e. the
  • the wireless ground-to-satellite and wireless air-to- satellite links may operate in non-overlapping spectrums, so that there is no or negligible interference between them. It can be advantageous, particularly though not exclusively where the wireless ground-to-satellite interface and wireless air-to- satellite links are to the same satellite or to nearby satellites, for the ground-to- satellite wireless link to operate in a first spectrum, e.g. RF spectrum (i.e.
  • the air-to-satellite link to operate in a second, distinct spectrum that does not overlap with the first spectrum, e.g. a visible and/or infrared spectrum (i.e. restricted to visible and/or infrared frequencies), so that there is no or negligible interference between the two wireless links.
  • a visible and/or infrared spectrum i.e. restricted to visible and/or infrared frequencies
  • the wireless ground-to-satellite communication link may operate in a microwave frequency spectrum of the radio frequency spectrum and the wireless ground-to- satellite communication link may operate in said microwave frequency spectrum.
  • the satellite communication system may comprise a remote system (remote from the ground station, but still Earth-based), and the satellite may be configured to relay signals between the wireless air-to-satellite link and a remote ground-to-satellite communication link between the satellite and the remote system. Communication between the ground station and the remote system can be effected via the satellite in a number of ways.
  • the remote link may be a direct wireless (e.g.
  • RF link between the satellite and the remote system, whereby the satellite relays signals between the air-to-satellite link and the remote link by performing suitable signal conversion, for example by converting laser signals received on a laser-based air-to-satellite link to an RF form for transmission via the remote link, and/or vice versa.
  • suitable signal conversion for example by converting laser signals received on a laser-based air-to-satellite link to an RF form for transmission via the remote link, and/or vice versa.
  • Multiple such remote ground-to-air communication links to multiple remote systems may be provided within one or more user beams, the satellite being configured to relay signals between the remote links and the air-to- satellite link.
  • the remote links may be distributed between multiple user beams.
  • the ground station may be a gateway to a network, the network being accessible to the remote system(s) via the air-to-satellite and ground-to-air links.
  • the network may be an internet such as the Internet (capital I), whereby the gateway provides an Internet access service to the remote system(s) using the ground-to-air and air-to-satellite links so that it/they can access Internet services such as Web services, email services etc. via the ground-to-air and air-to-satellite links.
  • the ground station is configured for the most part in the manner of a conventional gateway Earth station, with a gateway antenna providing a direct ground-to-satellite communication link in the manner described above, but with the addition of the ground-to-air and air-to-satellite links to provide extra capacity, without having to provide additional, geographically distributed gateways.
  • Signals are communicated between the gateway and the satellite in both RF and laser forms, but are only communicated between the satellite and the client system(s) in RF form, with the satellite performing appropriate signal conversion.
  • the gateway 104 can for instance provide an Internet access service to the client system(s), which is provided in part using the ground-to-air and air-to-satellite communication links between the gateway and the satellite.
  • the gateway 104 can for instance provide an Internet access service to the client system(s), which is provided in part using the ground-to-air and air-to-satellite communication links between the gateway and the satellite.
  • the RF infrastructure of the gateway may be omitted so that service is provided entirely via the ground-to-air and air-to-satellite links.
  • cloud level is the maximum height ever attained by opaque cloud at the geographic location of the support structure during the current season (cloud level may be subject to both geographic and seasonal variations) - within this limit, the height and amount of cloud may vary over time, on a day-to-day, hour-to-hour or minute-to-minute basis.
  • ground-to-air communication air-to-satellite communication
  • air- to-satellite air- to-satellite
  • any of the aforementioned communication links can be unidirectional in either of the relevant directions, or bidirectional.
  • a method of effecting satellite-based communication comprises:
  • the method may implement any of the system functionality disclosed herein, Brief Description of Figures
  • Figure 1 is a schematic diagram of a known type system for providing internet access via satellite
  • Figure 2 is a schematic diagram showing geographic coverage of a cluster of satellite beams
  • Figure 3 is a schematic diagram of a part of a system for providing internet access via satellite beams
  • Figure 4 is a schematic illustration showing how a satellite communication system may be configured in various embodiments of the present invention.
  • Figure 4A is a schematic illustration of a satellite communication system in a first embodiment
  • Figure 4B is a schematic illustration of a satellite communication system in a second embodiment
  • Figure 5 schematically illustrates layers of Earth's atmosphere.
  • FIG. 1 shows how the satellite communication system 100 may be reconfigured in various embodiments.
  • the system 100 comprises a ground station 400 at a geographic location having a local environment, a remote system 401 at another geographic location remote from the ground station 400, and a satellite 110.
  • the satellite 110 is in a geostationary orbit, and is thus substantially stationary relative to the ground station 400,
  • a cable interface 403 of the ground station 400 is connected to one end of a long communication cable 402.
  • the cable 402 runs from the ground station 400 in a generally vertical direction up to a high altitude platform "HAP" at an elevation above the local environment's local cloud level.
  • the HAP comprises a wireless interface 404 and a cable interface 405 connected to the wireless interface 404.
  • the wireless interface 404 is supported by the HAP.
  • the other end of the long cable 402 is connected to the cable interface 405 of the HAP.
  • the HAP maintains an elevation Hs of typically about 12-25km above sea level SL thus the cable 402 needs to have a length at least comparable to this, though this depends on the ground level GL at the geographic location of the ground station 400.
  • the cable may in practice need some additional slack to account for movement of the HAP relative to Earth.
  • the cable may for instance be an electrical or optical (e.g. fibre-optic) cable, capable of carrying data bearing electrical and optical signals respectively.
  • the cable 402 provides a wired ground-to-air communication link, which is bidirectional in this example i.e. via which data can be sent both from the HAP to the ground station 400 and from the ground station 400 to the HAP.
  • the HAP has a line of sight to the satellite 110 which, due to its elevation above local cloud level, remains substantially unobstructed by opaque cloud at all times.
  • the HAP and the satellite 1 10 each comprise a respective wireless interface in the form of a respective laser-communication interface 404, 410.
  • Each laser interface 404, 410 comprises a respective laser beam emitter E and laser beam receiver R.
  • Data bearing laser beams (i.e. onto which data has been modulated) emitted by the emitter E of one of the laser interfaces 404, 410 along the line of sight are receivable by the receiver R of the other laser interface 410, 404, free from disruption by cloud.
  • the laser interfaces 404, 410 provide a bidirectional laser link 406 between the HAP and the satellite 1 10, which is an example of a wireless air-to- satellite communication link.
  • the HAP will not remain fully stationary relative to Earth or the satellite 1 10, but this can for instance be accounted for with station-keeping using engines hosted on the HAP, complemented by tracking systems on the laser telescopes on the satellite and HAP,
  • ground-to-air link provided by the cable 402 and the air-to-satellite link 408 constitute an indirect ground-to-satellite link, which is indirect due to the presence and operation of the elevated wireless and cable interfaces 404, 405 on board the HAP.
  • a remote ground-to-sateilite communication link 403 ⁇ remote from the ground station 400) is also provided for communication between the remote system and the satellite 1 10,
  • the remote link 403 may for instance be a conventional direct RF link to a remote system 401 on Earth's surface (see first embodiment, below), or it may be another indirect link with equivalent constituent ground-to-air and air-to-satellite components provided in the same manner. That is, the remote system 401 may formed of another ground station and another HAP connected in the same
  • FIG 4A shows how the satellite communication system may be reconfigured in a first embodiment.
  • the ground station 400 is a gateway Earth station 104, operating as a gateway to the network 102 and having a gateway antenna 106.
  • the cable interface 403 now included in the gateway 104 is connected to the network 102, whereby data can be communicated in both directions between the network 102 and the HAP via the cable 402,
  • a plurality of remote systems 401 take the form of client systems 112 of the kind described with reference to figure 1 , each having a respective antenna 1 16 capable of emitting and receiving RF signals form the satellite 1 10.
  • the satellite 1 10 is configured as a spot-beam satellite to provide a plurality of user beams 202a, 202b in the manner described above with reference to figures 2 and 3, each covering a respective subset of the client systems 1 12. That is, communication between the satellite 110 and the client systems 1 12 is based on the same spot-beam technology as described above with reference to figures 1-3. In other words, communication between each client system 1 12 is via a respective direct RF link, between that client system and the satellite 110, that is contained within the user beam covering that client system.
  • the gateway 104 and the satellite 1 10 still takes place via a direct RF link 408 in the known manner described above.
  • the satellite 110 can also operate on the same radio technology as existing spot-beam satellite i.e. it can have RF communications logic 414 which is the same as existing spot-beam satellite.
  • the only extra components needed are an on board laser interface 410 of the kind described above and signal conversion logic 412 for converting signals between laser and RF forms.
  • the ground-to-air link provided by the cable 402 and the air- to-satellite laser link 406 are "extra" links, in that they provide extra capacity for communications between the gateway 102 and the satellite 110 above and beyond that provided by the conventional, direct RF ground-to-satellite link 408.
  • Data transmitted from the satellite 1 10 within any one of the user beams 202a to a client system 1 12 may have arrived at the satellite 1 10 by either of the direct link 408 or the extra indirect link i.e. via the HAP.
  • data received from a client system within any one of the user beams may be relayed down to the gateway 104 via either of the direct link 408 or the extra indirect link.
  • FIG. 4B illustrates a second embodiment, in which two ground station stations 404a, 404b are each connected to a respective high altitude platform HAPa, HAPb via a respective cable 402a, 402b, each having a respective wireless interface 404a, 404b, whereby respective wireless air-to-satellite links 406a, 406b are provided between each of the HAPS HAPa, HAPb and the satellite 1 10.
  • Each ground station- HAP pairs is configured individually in the manner described above with reference to figure 4, so that a respective indirect ground-to-satellite link is provided between each ground station 400a, 400b and the satellite 1 10 and the relevant HAP HAPa, HAPb.
  • data can be communicated between the ground stations, which travels via both indirect links in turn, in both directions.
  • One of the ground stations may be a gateway 104, and the other a client system 112 (for example).
  • wireless link refers to communication by
  • a line of sight being "substantially unobstructed" by cloud means that no or negligible opaque cloud obstructs the line of sight.
  • Opaque means opaque to any electromagnetic signals transmitted via the wireless link, for example infrared and/or visible electromagnetic signals.
  • cloud level means the maximum altitude reached by opaque cloud in a local environment at a geographic location during the current season, wherein it can be guaranteed that no or negligible opaque cloud will be present in the local environment above that elevation.
  • FIG. 5 shows some of the lowest layers of Earth's atmosphere, to illustrate suitable elevations of a HAP in accordance with this disclosure.
  • T troposphere TS and stratosphere SS are shown.
  • the tropopause, labelled TP is the boundary between the troposphere TS and stratosphere SS.
  • Most of Earth's weather is contained below the tropopause TP within in the troposphere TS, and there is generally no or negligible cloud in the stratosphere SS.
  • the height of the tropopause TP above sea level SL varies with both season and geographic location, and is highest in equatorial regions. Overall, it can vary between about 7km-10km above sea level SL at the poles, and about 17-20km above sea level SL at the equator.
  • cloud level as it is defined herein will correspond at least approximately to the current height of the troposphere the geographic location of the wireless interface, although this will depend on the local environment i.e. local environmental factors can mean that cloud level as it is defined herein is somewhat lower than the top of the troposphere (see below). Thus cloud level may vary with the height of the troposphere.
  • the tropopause can be considered as three sub regions - high, middle and low (H, M, F in figure 5), defined by the physical characteristics of the cloud found at different altitudes.
  • opaque cloud may be essentially contained within the low and middle regions i.e. so as not to exceed about 10km (order of magnitude) above sea level. This may mean that cloud level is significantly lower than the height of the troposphere at some geographic locations, at least at some points in the year. For a given local environment and geographic location, what constitutes cloud level will be determinable by way of routine
  • cloud level as defined herein will not exceed the height of the tropopause at that location, whatever that height may be given the current location and season.
  • any object above the troposphere will, in practice, be above cloud level as the term is used herein.
  • ground level GL varies with geographic location. Except in mountainous regions, the difference between ground and sea level in this context will be negligible. Thus, in most cases, the wireless interface will be elevated at a minimum height multiple kilometres above the ground vertically beneath it, typically at least 10km (order of magnitude). Thus, typically, the ends of cable 402 will be have a vertical separation equal to this minimum height, and will be at least this long. Whatever the height of the wireless interface, it will always be in Earth's atmosphere.
  • the height of the support structure may be varied, for example to lower the wireless interface when no or only low opaque cloud is present and raise it above cloud level only when opaque cloud reaching cloud level returns. This may, for instance, be based on meteorological monitoring of the local environment. Cloud level may exhibit long-term variations, e.g. due to climate change, as well as cyclic, seasonal variations. Whilst in the above, a support structure takes the form of a HAP, the possibility of a very tall support structure on Earth's surface is not excluded - in this case an upward reaction force maintains the necessary elevation of the wireless interface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Radio Relay Systems (AREA)

Abstract

L'invention fait intervenir une structure porteuse qui porte une interface sans fil à une altitude supérieure au niveau des nuages, l'interface sans fil possédant ainsi une ligne de vision vers un satellite qui reste sensiblement exempte d'obstruction par les nuages. La Terre et/ou son atmosphère exercent une force ascendante sur la structure porteuse pour maintenir ladite altitude. Une station au sol est reliée à l'interface sans fil par une liaison de communication sol-air entre la station au sol et l'interface sans fil. L'interface sans fil relaie des signaux porteurs de données entre la liaison de communication sol-air et une liaison de communication sans fil air-satellite entre l'interface sans fil et le satellite, réalisant ainsi une communication de données entre la station au sol et le satellite.
PCT/EP2016/067798 2015-07-27 2016-07-26 Communication par satellite WO2017017100A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1513178.2 2015-07-27
GB1513178.2A GB2540774A (en) 2015-07-27 2015-07-27 Satellite communication

Publications (1)

Publication Number Publication Date
WO2017017100A1 true WO2017017100A1 (fr) 2017-02-02

Family

ID=54106651

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/067798 WO2017017100A1 (fr) 2015-07-27 2016-07-26 Communication par satellite

Country Status (2)

Country Link
GB (1) GB2540774A (fr)
WO (1) WO2017017100A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997007609A2 (fr) * 1995-08-11 1997-02-27 Ramot University Authority For Applied Research & Industrial Development Ltd. Plate-forme a haute altitude pour systeme de telecommunications cellulaire
WO1997033790A1 (fr) * 1996-03-15 1997-09-18 Wong Alfred Y Plates-formes stationnaires plus legeres que l'air, evoluant a haute altitude et comprenant des moteurs ioniques
EP0837567A2 (fr) * 1996-10-17 1998-04-22 The Boeing Company Réseau de communication large bande aéroporte
WO1998035506A2 (fr) * 1997-02-10 1998-08-13 Stanford Telecommunications, Inc. Passerelle de telecommunications a debit de donnees tres eleve pour telecommunications terre - espace - terre
WO1999013598A1 (fr) * 1997-09-08 1999-03-18 Angel Technologies Corporation Telecommunication au moyen d'une plate-forme atmospherique
US5909299A (en) * 1997-04-28 1999-06-01 Sheldon, Jr.; L. Philip Microsatellite system for high-volume orbital telemetry
WO2000014902A2 (fr) * 1998-09-08 2000-03-16 Angel Technologies Corporation Reseau permettant d'assurer des communications sans fil au moyen d'une plate-forme atmospherique
WO2001052453A1 (fr) * 2000-01-10 2001-07-19 The Johns Hopkins University Systeme de communications optiques utilisant un ballon captif a haute altitude
WO2001078257A2 (fr) * 2000-04-10 2001-10-18 Aerovironment Inc. Syteme de communication
WO2001078256A1 (fr) * 2000-04-06 2001-10-18 Skycom Corporation Relais suborbitaux
WO2002061971A1 (fr) * 2001-02-01 2002-08-08 Skylinc Limited Systeme de communication a l'aide d'un aerostat captif au-dessus de la surface de la terre et lie a une station de base par une fibre optique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5949766A (en) * 1996-12-30 1999-09-07 Motorola, Inc. Ground device for communicating with an elevated communication hub and method of operation thereof
US6205320B1 (en) * 1998-09-04 2001-03-20 Richard Coleman System for satellite to airship to gateway/customer premise equipment, and airship to airship, high data rate relay
WO2001059961A1 (fr) * 2000-02-08 2001-08-16 Sky Station International, Inc. Systeme et procede de telecommunications optiques en altitude
US8918047B1 (en) * 2012-06-26 2014-12-23 Google Inc. Use of satellite-based routing processes with a balloon network

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997007609A2 (fr) * 1995-08-11 1997-02-27 Ramot University Authority For Applied Research & Industrial Development Ltd. Plate-forme a haute altitude pour systeme de telecommunications cellulaire
WO1997033790A1 (fr) * 1996-03-15 1997-09-18 Wong Alfred Y Plates-formes stationnaires plus legeres que l'air, evoluant a haute altitude et comprenant des moteurs ioniques
EP0837567A2 (fr) * 1996-10-17 1998-04-22 The Boeing Company Réseau de communication large bande aéroporte
WO1998035506A2 (fr) * 1997-02-10 1998-08-13 Stanford Telecommunications, Inc. Passerelle de telecommunications a debit de donnees tres eleve pour telecommunications terre - espace - terre
US5909299A (en) * 1997-04-28 1999-06-01 Sheldon, Jr.; L. Philip Microsatellite system for high-volume orbital telemetry
WO1999013598A1 (fr) * 1997-09-08 1999-03-18 Angel Technologies Corporation Telecommunication au moyen d'une plate-forme atmospherique
WO2000014902A2 (fr) * 1998-09-08 2000-03-16 Angel Technologies Corporation Reseau permettant d'assurer des communications sans fil au moyen d'une plate-forme atmospherique
WO2001052453A1 (fr) * 2000-01-10 2001-07-19 The Johns Hopkins University Systeme de communications optiques utilisant un ballon captif a haute altitude
WO2001078256A1 (fr) * 2000-04-06 2001-10-18 Skycom Corporation Relais suborbitaux
WO2001078257A2 (fr) * 2000-04-10 2001-10-18 Aerovironment Inc. Syteme de communication
WO2002061971A1 (fr) * 2001-02-01 2002-08-08 Skylinc Limited Systeme de communication a l'aide d'un aerostat captif au-dessus de la surface de la terre et lie a une station de base par une fibre optique

Also Published As

Publication number Publication date
GB2540774A (en) 2017-02-01
GB201513178D0 (en) 2015-09-09

Similar Documents

Publication Publication Date Title
Hosseini et al. UAV command and control, navigation and surveillance: A review of potential 5G and satellite systems
EP3326299B1 (fr) Réseau de communication global
CN107017937B (zh) 卫星通信系统和用于提供卫星通信的方法
US9793977B2 (en) Systems for recovery communications via airborne platforms
US10212610B2 (en) System for telecommunications by network of stationary high-altitude platforms and drifting balloons
CA2403280C (fr) Systeme de communication suborbital
US9847829B2 (en) Satellite communication system, LEO satellite relaying communications between a GEO satellite and terrestrial stations, the uplinks and downlinks using the same frequency band and time-division multiplexing
Alsamhi et al. An intelligent HAP for broadband wireless communications: developments, QoS and applications
ES2385622T3 (es) Reutilización de frecuencia en un sistema de comunicación de satélite geosíncrono
US20140128059A1 (en) Device and method for optimizing the ground coverage of a hybrid space system
US11979188B2 (en) Hybrid communication
AU2018276237B2 (en) Intermediate network composed of stations located on high-altitude platforms for a radiocommunications system
Matracia et al. Bridging the digital divide
McLain et al. High throughput Ku-band satellites for aeronautical applications
Mohorcic et al. Broadband communications from aerial platform networks
WO2017017100A1 (fr) Communication par satellite
Knopp et al. Connectivity services based on optical ground-to-space links
KR20210064032A (ko) 저궤도 위성 및 무인 비행체에 기반하는 해상 통신 시스템
Johni Measurements to design a coverage area by using high altitude platform systems
WO2001078256A1 (fr) Relais suborbitaux
Ilcev et al. Weather observation via stratospheric platform stations
Wang Performance comparison of Hierarchical Non-Terrestrial Networks for 6G
US20150029932A1 (en) Ultra broadband networks and methods
RU2619582C2 (ru) Многофункциональная система спутниковой связи
Ilcev Development of Airships Stratospheric Platform Systems (SPS)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16742321

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16742321

Country of ref document: EP

Kind code of ref document: A1