CN1155192A - Mobile satellite user information request system and method - Google Patents
Mobile satellite user information request system and method Download PDFInfo
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- CN1155192A CN1155192A CN 96121614 CN96121614A CN1155192A CN 1155192 A CN1155192 A CN 1155192A CN 96121614 CN96121614 CN 96121614 CN 96121614 A CN96121614 A CN 96121614A CN 1155192 A CN1155192 A CN 1155192A
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Abstract
Disclosed are methods and apparatus for use in a satellite communications system (10) that enable a user to gain knowledge of a direction to one or more 'best' satellites available to the user. This information enables the user to alter his or her position to take advantage of the one or more 'best' satellites at any particular time in order to facilitate the ability to log-on, initiate and receive calls, and complete calls. The information can be supplied by the user terminal (13) itself, or by a gateway (14). The information can be employed by the user to select for a period of time, by example, a position on an east side of a building, to move to a south-east facing window, or to take some other action that enhances the user's connectivity to one or more of the satellites.
Description
Present invention relates in general to have mobile user's communications system, especially relate to the communication system based on satellite, wherein mobile subscriber terminal is connected to Ground Communication System by at least one satellite.
Mobile communication system, the global system for mobile communications that especially adopts earth-orbiting satellite to troop may present attempting to be connected to one or more satellites or keeping the user's who is connected to one or more satellites obstruction and block.Satellite with duplexing user RF signal relay to ground gateway, so that further be connected to for example PSTN (PSTN).But if given user is hindered to the access of one or more satellites, the user may impotentia be registered in system and startup or receipt of call or continue ongoing calling.It is mobile subscriber and with respect to possible RF shelter for example under the situation of leaf class shelter and building that this problem especially can appear at the user.
Adopt especially geostationary satellite system of known mobile subscriber's satellite system, have only a satellite to be in user's the visual field usually.In addition, satellite go up under the line or its near determining positions the direction from the user to satellite.On the Northern Hemisphere, this direction is to the south generally.
But the new development of communication, computer and grapefruit satellite technology has made it possible to propose the notion that satellite is trooped, and wherein in the major part at the earth's surface, at least two satellites can be in the ken of any position.In addition, adopt the development of the handset user terminal of code division multiple access (CDMA) to make to utilize diversity technique to cover and become possibility as the many satellites that block and hinder means that reduce the user.For example, user terminal can be kept connection simultaneously by two or more satellites that the LEO satellite that is in simultaneously in the ken is trooped.
A problem that exists when developing the trooping of Low Earth Orbit (LEO) satellite for example is, comes to set up or keep communication by one or more satellites for making it have maximum ability, and the user can not directly be known its optimum orientation that should face or migration usually.This is to move because of satellite with respect to the user, and in arbitrary given time, and for the user, satellite may not be positioned on certain predetermined and direction constant (that is, being in south under the geostationary satellite situation).
For troop (in the non-pole orbit) of One Earth One Family orbiter, can find that a day aerial user " sees " that with energy the part of satellite is the function of latitude.Go up under the line (0 (latitude), sky is covered equably by satellite orbit, and (locate, only in the very little part of northern sky, the user can see satellite at north latitude about 70.For medium latitude, can not find that the size in the zone (being called " occultation district " here) of satellite diminishes gradually with close equator.For the track of annular, the south latitude situation is the mirror image of north latitude situation.
In addition, in typical case, except the zone that no satellite passes, can find multiple signal bar, for example building, communal facility pile, tree etc.Obviously, in arbitrary given time, for the communication that transmits between terrestrial user and the one or more satellite, a part of having only sky is best.
If the user is positioned at building, this problem will be compound, because the upper frequency that uses on the forward link between satellite and user terminal (for example S-frequency band) can not normally penetrate any big distance in the building.As a result, if the close building window that can " see " satellite of user, the user can experience the better link quality.
The user can imagine, if always near the window (on the Northern Hemisphere) towards south, will always experience best link-quality so.But situation is really not so.For example, suppose that the user is in the ken with relevant (that is, communication is simultaneously by two satellite transmits) of diversity and these satellites of two satellites.According to employed two satellites, in one case, may be best, and for second kind of situation towards the window in southwest, may be best towards the window of the southeast.In either case, the window most probable towards north provides the poorest link-quality (certain the unexpected orientation that does not have the signal reflex surface).
Therefore, the objective of the invention is to provide user's access of auxiliary moving communication satellite system, the method and apparatus that starts and receive and keep calling.
Method and apparatus of the present invention has overcome above-mentioned problem with other, and realizes above-mentioned purpose, and this method and apparatus makes the user can know the direction of its available one or more " the best " satellite.This information makes the user change its position in any specific time and makes full use of one or more " the best " satellite, so that strengthen the ability that inserts, starts and receive and finish calling.This information can be provided by service system, and can adopt the position of selecting for example to be positioned at the building east side within a certain period of time by the user, shifts to the window that faces the southeast or take certain action to strengthen the concatenation ability of user to satellite communication system.
Instruction of the present invention has utilized such fact, the gateway of coverage, managing user terminal place is known the position (longitude and latitude) of user terminal, and can be from the position and the vertical angle of all satellites the satellite ephemeris data computation user terminal ken.Another kind method is, gateway can send to user terminal with the satellite ephemeris data, and user terminal can calculate the position and the vertical angle of the satellite in the ken subsequently.Gateway can also be known the physical features relevant with the position of user terminal according to the geographical map of storage.In this case, gateway can send information to user terminal on the forward link, and informing user terminal is taked certain action to improve link-quality according to satellite position current and/or expection or made link-quality the best.This information is received the decode by the user terminal controller, and can inform the user by demonstration or other modes.
This information that will send the user to can automatically be produced and be sent by gateway, is perhaps only produced in response to user's request and is sent by gateway.For example, if the user with predetermined sign indicating number with the request entry key dish, this sign indicating number then sends to gateway by one or more satellites on return link.Scope of the present invention also comprises the bright environment around it of the code table that allows user terminal transmit by using, and allows gateway improve thus or optimizes instruction to the user.For example, the user can it be in the building with a kind of representation, and it is in the dense grove with another kind of representation, and it is in the urban district that is surrounded by high-lager building with another representation.
The user can regularly be prompted to report its surrounding environment, perhaps only determines according to the user terminal power control information that the user is at gateway and blocks or signal jam when zone its surrounding environment of prompting user report by force.Be provided with or continue and call out if the user can be guided into better position subsequently, then will improve calling ratio of success, the power that the minimizing system is required, the total capacity of increase system.
Read following detailed description the in detail of the present invention in conjunction with the drawings, can more clearly understand above-mentioned and other features of the present invention, in the accompanying drawing:
Fig. 1 is the simplified block diagram according to satellite communication system of the present invention;
Fig. 2 A and 2B are the sky schematic diagram that directly is in above the user terminal, and they illustrate no satellite region (being called " occultation district " here) and the time dependent track of two satellites (" A " and " B ");
Fig. 3 A and 3B are illustrated in a given time satellite " A " and " B " position with respect to user terminal;
Fig. 4 is illustrated in Fig. 3 A overlapping in the sky ken above the user terminal and two satellite positions of 3B, and the direction with highest communication success rate with respect to the user also is shown when simultaneously by two satellites " A " and " B " (promptly adopting the diversity of two satellites);
Fig. 5 illustrates the sky schematic diagram of Fig. 4, the building of the exemplary band window that superposeed on it, and user terminal is in this building, and this figure is used in particular for explaining user instruction feature of the present invention;
Fig. 6 is the block diagram of first embodiment of satellite communication user terminal, and this is " the passive type user is an auxiliary " embodiment;
Fig. 7 is the block diagram of second embodiment of satellite communication user terminal, and this is " user information request that gateway is an auxiliary " embodiment;
Fig. 8 is the block diagram of satellite communication system of the present invention, and this system has gateway auxiliary user information request and oolhiu interactive user terminal.
The part of the LEO satellite communication system 10 of operation according to the present invention is described referring now to Fig. 1.Although following content description is the LEO satellite communication system, should be understood that instruction of the present invention also is applicable to the system outside the LEO, such as medium-sized Earth's orbit (MEO) system.
A plurality of satellites 12 that satellite is trooped have relevant " footprint " 12a separately, and this " footprint " is projected on the earth surface and with satellite and moves.User terminal 13 has display window 13a, keyboard 13b and antenna 13c.Adopt suitable R F circuit (not shown in figure 1) and antenna 13c, gateway 14 transmission requests also can be from ground gateway 14 reception information earthward for user terminal 13.Request and information adopt RF link 12b to relay to antenna 13c by at least one satellite 12, and employing RF presents link 14a and relays to gateway 14.The ephemeris of satellite 12 and position are known to the gateway 14, and preferably also are known to the user terminal 13.
In this preferred embodiment of the present invention, gateway 14 is connected to PSTN, thereby provides from user terminal 13 to landline phone 16 and/or the communication path of ground data equipment (illustrating with computer 17 generally).The track of shown satellite 12 has been drawn gateway service area (SA).User terminal 13 is arranged in the ad-hoc location of SA, that is is positioned at specific latitude and longitude.Gateway 14 is known the position of user terminal 13, because gateway 14 calculates the position of user terminal when writing down (log-on) and registering to system.Gateway 14 can utilize the ability of the computed user locations of system itself (such as by triangulation) for example and/or can utilize the known technology of HA Global Positioning Satellite (GPS) information or other types.In addition, for example, the position of user terminal 13 can also be determined by the gateway 14 by each call before allowing connection.
Referring now to Fig. 2 A and 2B, shown in it is the sky schematic diagram of directly upwards seeing from user terminal 13 (ken of " flake ").User terminal 13 is assumed to be the center that is positioned at annulus.Since the characteristic that specific satellite is trooped, sky dummy section and a sky dummy section that at all can't see satellite of existing a satellite 12 to present.The relative size in these two zones and shape depend on the inclination angle of track, the height of track, the ovality of track and user's latitude and longitude.The zone that satellite 12 never presents is called " occultation district " here.Therefore any satellite that is in the ken of user terminal 13 all is set in remaining zone, and presents or present in groups single, and presentation mode depends on the ovality of height, inclination angle and the track of number of satellite in trooping, track.The situation of Fig. 2 A and 2B reflection is: the annular inclined plane of about 1400km, the user be in about north latitude 45 (.
The relative size that should be noted in the discussion above that the occultation zone changes with latitude, (that is, and for shown in example for, at higher latitude place, it is big that the relative size in occultation zone becomes).Because trooping of satellite 12 is around geocyclic, so the position of satellite 12 changes in time.
For example, of the present invention this preferred but and in the non-restrictive example, on the Low Earth Orbit (LEO) of 1414km, always have 48 satellites 12.Satellite 12 is distributed on 8 orbit planes, and 6 equally spaced satellites (Walker troops) are arranged on each plane.Orbit plane with respect to the equator tilt 52 (, every satellite was finished an orbital motion in per 114 minutes.In any given time, from be in about south latitude 70 (to north latitude 70 (between a specific user position, this mode provides the covering in the basic whole world with best at least two satellites.Like this, the user is by one or more gateways 14 and one or more satellite 12, also may adopt a part, another point on almost can be or communicate (by means of PSTN) in the other direction from any point in the overlay area of the gateway on the earth surface 14 to earth surface by the phone basic system of PSTN representative.
Be appreciated that around the orientation of user terminal 13 that from Fig. 2 A and Fig. 2 B the direction of " the best " satellite can be calculated by user terminal 13 or gateway 14.Carry out this calculating and need know the time on the ephemeris of the position of user terminal, satellite, date and the same day.
Fig. 2 A illustrates the motion by the satellite 12 of " A " expression above the user terminal 13.Satellite " A " on the horizon from low to the peak motion, after a part of passing through, return the horizon facing to the sky of user terminal.If a barrier is positioned on the level and vertical angle that will block satellite 12, sight line that is therefore can interrupt with communicating by letter of user 13.Fig. 2 B be illustrated in shown in identical time of the motion of satellite " A " in the motion of second satellite " B ".Should be noted that these two satellites do not overlap.For example, a specific moment, the position of satellite " A " and " B " is shown in Fig. 3 A and 3B, and Fig. 4 illustrates satellite " A " and " B " and is overlapped in clear day dummy section above the user terminal 13 in the identical moment.Though two satellites should be understood that shown in these figure,, in the ken of user terminal 13, has plural satellite in any given time.
For obtaining best communication performance, can adopt multiple technologies estimation " the best " direction.For example, can obtain the estimation to azimuth direction by the following method, this method is with " separating (split) " two satellites, and this method comprises: the first orientation direction that is calculated to satellite " A "; Be calculated to the second orientation direction of satellite " B "; Obtain the difference of this both direction; Difference is removed 2; With resulting result is superimposed to determined first orientation direction.According to an aspect of the present invention, result calculated can be used for indicating preferable orientation, position and/or orientation to the user like this, so that obtain best communication performance.
Because " optimum position " of the user terminal of determining here 13 is at least one parameter in the orientation (for example with respect to the determined extremely angular orientation of " the best " direction of one or more satellites 12) of the height (for example floor of multi-story structure) of the position (for example latitude and longitude) that will comprise user terminal, user terminal and user terminal and/or user terminal antenna.
Fig. 5 illustrates an exemplary of the application scenario of instruction of the present invention.In Fig. 5, user terminal 13 is assumed to be and is positioned at the have window building of (W) that window (W) is arranged on each of four angles (being represented by C1-C4).The initial position of user terminal 13 is represented by P1.Position (latitude and longitude) according to user terminal 13, and according to satellite A shown in Figure 4 and the relative position of B, the user is instructed to move to position P2, and this position is close with the window (for example facing the window of the southeast) in the face of " optimum orientation ", in this case for being positioned at the window of angle C1.Some part that should be pointed out that the window that is positioned at angle C2 and C4 also can provide the communication performance that meets the demands.
At least can obtain two kinds of methods that are used to calculate and send this information to the user.First method as shown in Figure 6, its adopts the information be stored in user terminal 13 and/or calculated by user terminal 13.For making performance the best of satellite/user terminal communication link, the user terminal 13 with this ability can automatically be determined best sending direction and/or position.
Second method as shown in Figure 7, it makes the user can ask the help of gateway 14 and realizes identical functions.In this case, gateway 14 is for user terminal calculates, and the information that obtains is sent along RF link 14a and 12b by at least one satellite 12.
The advantage of first method is, only has seldom or do not have information to transmit on kusatellite relay system, preserved voice, data and other professional message capacities thus.The another kind of advantage of first method is, it makes to have broken away from the user terminal of communicating by letter of gateway and can set up and the communicating by letter of gateway.
As shown in Figure 8, the further ability of system 10 is to calculate and predict the ability of following " the best " communications status.For example, the user may wish to allow its user terminal 13 maintenance work and not portable terminal 13 and via satellite communication system 10 receive data.In this case, required data can be by PSTN gateway 14 and the satellite 12 long-range user terminals 13 that are loaded to.User terminal 13 exports these data to the storage computation machine that for example links to each other subsequently again.For this situation, the user can be to the further satellite cluster information of gateway 14 requests.Gateway 14 predictions can provide the scope of the user terminal location of best link performance in official hour.Another kind of mode is, these calculate by user terminal itself and adopt for example shown menu to finish, and described menu prompt user imports required data (date and time on the same day of the data of for example will long-rangely packing into) by keyboard.
Adopt directional antenna also to belong to scope of the present invention as user terminal antenna 13, this antenna is pointed to the direction that makes communication link performance the best by mechanical or electric driving.This directional antenna needn't be too expensive, and key is that it can provide for example hemisphere, 1/4th spherical or strong directional characteristics.Under the situation of any request user profile output, system of the present invention all can be used for or is antenna direction with real-time mode or according to prediction data.The information of determining relevant satellite position that technology obtains and optimum orientation according to optimal selection can be from the gateway 14 long-range user terminals 13 that are loaded to.
With reference to Fig. 6, the method afford explanation of the present invention to proposing above now.User terminal 13 comprises a location positioning calculator 13d, and this calculator from for example GPS or other location positioning systems 15 and/or from satellite itself and/or via satellite 12, antenna 13c and CDMA/RF module 13e receive input from gateway 14.User terminal 13 also comprises a real-time clock and calendaring module 13f and a controller, and computer module 13g for example, the latter provide under the control of the algorithm 13h of storage or by detecting the ability that database 13i calculates the position of satellite 12.The position that is input as user terminal 13 (latitude and longitude) that computer module 13g needs.Clock and calendaring module 13f with reference to certain standard for example universal time set up orbit time.Adopt the initial value and the ephemeris (being stored in database 13i) of satellite orbit, can calculate and obtain the level and the vertical angle of the one or more satellites 12 in the ken of user terminal 13.These numerical value combine and produce best direction result, thereby obtain best communication link performance.According to the input of user, can adopt multiple different technology from keyboard 13b.For example, the user can select " building-window " option from shown menu, and this option selects suitable technique to come to be fit to best user's situation (as shown in Figure 5) again.For example, gateway 14 is at first revised user's position, revises the information (for example, " building-window ") that the user provides thereafter, revises the ephemeris of trooping (present and/or following), calculates the best located of user terminal at last.Resulting result may suitably be formatd subsequently, so that such as terminal being placed the input that reflects the user near the window of the optimum position of being calculated by the indication user.Can also allow the user answer further and the information of environmental correclation, for example by inquiring the floor (that is user's height) of the residing building of user.When calculating user terminal, also can use user's height with respect to the best orientation of one or more visual (or will be the very fast visual) satellite of trooping.In addition, the user can select " mountain-forest " option, and adopts a kind of different technology.In either case, the result all can show in some way or sends the user to suitable output format (square frame 13j).Output needn't be shown on the visual display window 13a of user terminal, but can show as the sound that computer produces, perhaps for showing the user to transmit (path 13k) to exterior display device, and the terminal of Xiang Lianing for example.
According to the information of showing, the user can make its position or direction with respect to 12 optimizations of the satellite in the ken.In addition, for driving the outside or the interior arrangement of user terminal 13, the result can be by orientation and/or the output of height form.For example, directional antenna can be only sends on optimum orientation and receives, the gain that increases user terminal antenna thus, and therefore reduce the transmitted power of user terminal.
Just as noted earlier, by importing times selected with keyboard 13b to computer module 13g, the user can select the time in a future to calculate " the best " direction.Computer module 13g is advanced to date and time selected date and time subsequently, and carries out optimum orientation and calculate.Except importing following date and time, assumed position is to know in advance with enough precision, and the following position of input user terminal also belongs to scope of the present invention.
In addition, can predict time range.In this case, the user can be in this shown time scope selects the tabulation of " the best " direction, and perhaps the user may be apprised of the best following time that communicates with satellite, because change the function of cluster structure between having selected at this moment.
Referring now to Fig. 7, this illustrates the user terminal 13 according to second method work of the present invention, and this second method is the auxiliary user information request systems approach of gateway.The assembly that has with embodiment Fig. 6 user terminal 13 is correspondingly indicated.Also will be with reference to Fig. 8, this figure illustrates in greater detail the assembly of the gateway 14 of realizing this method.
In the embodiment shown in Fig. 7 and 8, user terminal 13 does not need to calculate " the best " direction, but relies on gateway to realize this function.This has the effect of the complexity that reduces user terminal 13, but has increased aerial signal transmission to a certain extent.But, the service components that is used for this function is quite little.In addition, gateway 14 has the satellite ephemeris information of upgrading than user terminal 13 usually, so it can carry out more accurate " the best " direction calculating.
With reference to Fig. 7 and 8, user terminal 13 is provided with signal format device and interface square frame 131, and it is arranged between CDMA/RF module 13e and the computer module 13g.User terminal signal request formatter square frame 13m similarly is arranged between keyboard 13b and the computer module 13g.Be arranged between CDMA/RF module 13e and the computer module 13g is gateway information format device and interface square frame 13n.
Referring now to Fig. 8, gateway 14 comprises a plurality of controlled parabolic antenna 14c, and wherein each is connected to relevant CDMA/RF module 14d.Module 14d is two-way to be connected to the interface square frame 14e that various signals pass through.Gateway 14 also comprises user terminal location azimuth computer 14f, database of information 14g, clock/calendar module 14h and satellite orbit data and the ephemeris square frame 14i relevant with user terminal.The gateway controller that is arranged among the computer module 14j interacts with user terminal 13 under the guiding of algorithm 14k, to calculate and to transmit " the best " bearing data to the user.For this reason, gateway 14 comprises and is used for receiving the service request square frame 141 of service requests and being used for institute's information requested is fed back to user terminal 13 output format square frame 14m from user terminal 13 that this feedback realizes by interface square frame 14e, CDMA/RF module 14d, at least one antenna 14c and at least one satellite 12.Gateway 14 comprises that also the oolhiu interactive user terminal session starts square frame 14n, and its switch of employing (being expressed as SW) is coupled to a module among signal level measuring module 14o and environment prompting device (prompter) the module 14p convertiblely.Signal level measuring module 14o can be used to measure for example various combinations of the characteristic of signal strength signal intensity, the power that is received, signal quality (for example error rate) or these received signals.
The first step of this method is that user terminal 13 is online to system 10.The signal that a part online and registration storage program utilizes user terminal to send is determined user's position in square frame 14f, comprise latitude and longitude.The position of user terminal 13 is input to database 14g thereafter.User terminal information database 14g preferably receives and sends to call out with user terminal 13 and upgrades.In such a way, the current location among the database 14g is kept in the position of user terminal.Gateway 14 is known the satellite ephemeris data (satellite position, orbital motion and other orbit parameters) of trooping from database 14i, and can calculate and be in user terminal 13 level and the vertical angle of each satellite 12 in the ken of allocation really.These numerical value are used to produce " the best " direction result of user terminal 13 thereafter, and this result feeds back to user terminal 13 again.Match with the user terminal input, can adopt multiple different gateway algorithm.
The operation principle of embodiment shown in Figure 8 is as described below.For this embodiment, suppose that the user wishes to obtain such information, promptly this information makes the user can obtain the optimum position that communicates with one or more satellites 12.The user at first sends signal by the input unit (for example sound and computer data) of keyboard 13b and other types to gateway 14, and request obtains information service.The user can select the type of desired services from the menu of display window 13a or in the suitable output equipment of other types.Fig. 6 is described as reference, and the user can select " building-window " from shown menu.This service request is by computer module 13g formulism, and is sent to gateway 14 by request signal formatter 13m, CDMA/RF module 13e, antenna 13c and at least one satellite 12.Service request signal is received by gateway 14, is used as service request and handles in square frame 141, and combine with algorithm block 14k by computer module 14j, thereby calculate " the best " direction result.After " the best " direction result determined, this result was formatted as data flow in square frame 14m, and is sent to satellite 12 from gateway 14, and from then on is sent to requesting users terminal 13." the best " the direction result who is received is transmitted by the square frame 13n in the user terminal 13, and is formatted as text, sound or other suitable forms, and shows the user with the understandable form of user.In addition, can be used to the directional antenna of user terminal to guide direction with result level and/or vertical (angle) expression or that be converted to level and/or vertical (angle), as previously described.
Another feature of the customer information system that gateway of the present invention is auxiliary provides the auxiliary ability in oolhiu interactive user position.In this mode of operation, the user wishes to obtain the information more information than receiving easily by above-mentioned second method generally.In this case, the user starts the dialog interaction with gateway 14, and this request is by square frame 14n transmission and handle, and consists essentially of the measurement to one or more parameters of the user terminal signal characteristic that received by gateway 14.The method of this enhancing is to begin with the service request signal that the user sends the regulation interactive services.Correspondingly, computer module 14j starts square frame 14n with dialog interaction and combines, and sets up dialog interaction.User terminal location perhaps redefines from database 14g retrieval, and satellite position and ephemeris are to adopt database 14i to calculate by aforementioned manner, adopts suitable among the algorithm 14k definite " the best " position thus.Next step, user terminal 13 received signals and burst with reference to single-tone.After receiving and this request decoded, user terminal 13 is handled the gateway requests, and produces response with the reference signal pulse string.The reference signal pulse string is received by gateway 14 and is processed, for example the reference burst that is received is transferred to the signal level measuring module by switch, and determined characteristics of signals value is compared with reference value.Data thus, gateway 14 can determine whether user terminal 13 is being blocked or is otherwise being hindered to the direction of one or more satellites.Can not freely insert one or more in the satellites in view if user terminal 13 is determined, 14 of gateways are for example by selecting other combinations of satellites that determined " the best " direction is optimized again." again optimize and best " direction can combine with the predictive ability to later a few minutes of gateway.In either case, gateway 14 all sends suitable instruction to user terminal 13, and it considers the signal jam that any signal jam maybe will take place according to the current location of user terminal with following satellite position sometime.These instructions resemble and are formatted as data flow aforesaid, are sent to one or more satellites 12 from gateway 14, and send to user terminal 13 by it.The gained result is decoded in user terminal 13, and is formatted as the understandable form of user, and is demonstrated to the user.By adopting such repetitive requests and interactive dialogue, the user can guide to the position that makes its communication capacity maximum.
For paging operation, gateway 14 can be selected best time calling user terminal 13.For example, suppose and finished the auxiliary second method in oolhiu interactive user position that gateway 14 prediction satellites 12 are in the time of the optimum position that communicates with user terminal 13.For carrying out paging, user terminal 13 is preferably stayed with gateway 14 and is carried out for example staying on the desktop or on the windowsill on the position of oolhiu interactive user position auxiliary (information) exchange.The big distance of user terminal 13 moves the original oolhiu interactive user location assistance data of determining was lost efficacy.
For transmit additional information to the user, can adopt other interactive approach.In this case, the user provides information, and the auxiliary gateway 14 of this information is the behavior of user in predicting the best, so that user's communications is with the largest potentiality.The same with foregoing Enhancement Method, this method is to begin with the service request signal that the user sends the regulation interactive services.Response therewith, computer module 14j combines with dialog interaction startup square frame 14n and sets up dialog interaction.User terminal location is retrieved from database 14g, perhaps redefines, and satellite position and ephemeris adopt database 14i to calculate as the aforementioned like that, thereby adopts suitable algorithm 14k to determine " the best " position.After this user terminal 13 is pointed out by environment prompting device module 14p, and shows a request from the customer requirements more information.For example, the user is requested to import the information of the total environment of interpreting user, and this input realizes by the option of for example selecting shown menu.Exemplary option can comprise: " in building ", " near steep cliff ", " outdoor-near building ", " aboard ", or the like.User terminal 13 can send after gateway 14 sends user's selection or will select storage to treat immediately.(13g 14j) can be with further query-response user's initial input, and this further inquiry is based on the response of user to initial inquiry for the computer module of gateway 14 or user terminal 13.For example, if the user adopts the initial problem of " in building " response, second problem may be " which side? " so and be the demonstration in a plurality of directions (north, northeast, east, the southeast, south ...) subsequently, that side of its hithermost building of user by selecting (if knowing) responds this second problem.
As foregoing, from the data that this user provides, gateway 14 can determine that whether user terminal 13 is blocked to the direction of one or more satellites or is otherwise hindered at it.Can not freely insert one or more visual satellites if determine user terminal 13,14 of gateways are for example by selecting another kind of combinations of satellites to optimize determined " the best " direction again." the best after optimizing again " direction can combine with the predictive ability to later a few minutes of gateway 14.Final result sends instruction to the user, impels the user to take certain behavior to improve or optimize the quality of user terminal/satellite communication link.For example, according to the example that provides above, if the user with " southeast " response problem " which side? ", the instruction that gateway is determined may be " in 10 minutes side shifting " southwester.
Should be pointed out that user terminal 13 or gateway 14 also can send instruction to the user during phone or data communication, no longer is best if determine original " the best " direction of assert or position.That is to say that because the variation of the relative position of satellite 12 during connecting, the user also should change its position, with the optimal communication path direction of position with respect to satellite.According to foregoing example, suppose that initial user instruction is " in 10 minutes side shifting " southwester, the next instruction that sends in sound of setting up and/or data link can be for example " side shifting continues to call out southwester ".
In addition, the present invention is that angle from the RF link that adopts code division multiple access (CDMA) is described.This specific modulation and access technology are best for system 10, but it is not the restrictive condition in the practical application of the present invention.Here only illustrate, time division multiple access (TDMA) technology also can adopt, and mixed C DMA/TDMA props up art and also can adopt.
In addition, though be to be described with the angle that the LEO satellite is trooped, also can adopt other track structures here, such as the circular orbit that tilts, this track has for example 5500 nautical miles or bigger elevation (altitude).
Moreover in a preferred embodiment of the invention, satellite 12 plays the effect of " bend pipe " transponder, its reception, frequency inverted and transmission RF link 12b and 14a, and do not relate to any information content of communication traffic signal.But, the all or part of satellite 12 of establishing signal handling capacity and/or inside satellite link in the satellite that has to a certain degree is provided, also belong to scope of the present invention, can realize on satellite in this case that above-mentioned customer location is determined, satellite position is determined, the optimal user position is determined and instruction method all or part of.
Therefore, although with reference to preferred embodiment the present invention has been carried out concrete displaying and description, those skilled in the art can understand, and under situation about not departing from the scope of the present invention with spirit, can make multiple change aspect form and the details.
Claims (30)
1. method of moving satellite communication system, this system comprises a plurality of earth-orbiting satellites, at least one terrestrial user terminal and at least one ground gateway, this method may further comprise the steps:
Determine the position of user terminal;
Determine the position of one or more satellites with respect to determined user terminal location;
According to the position of determined user terminal and the position of determined one or more satellites, determine the position of user terminal, the position of the described user terminal in back can provide best communication path between user terminal and one or more satellite; With
Operator to user terminal shows instruction, this determined position of instruction indication.
2. method according to claim 1, wherein at least one determining step realizes in user terminal.
3. method according to claim 1, wherein at least one determining step realizes in gateway.
4. method according to claim 1, wherein at least one step realizes at least one satellite.
5. method according to claim 1, determine that wherein the method for the position of user terminal may further comprise the steps:
Prompting operation person imports the information of the environment of expression user terminal; With
Also will be according to determining this position by the information of operator's input.
6. method according to claim 1 determines that wherein the step of the position of one or more satellites adopts current time and date.
7. method according to claim 1 determines that wherein the method for the position of one or more satellites adopts following time and date.
8. method according to claim 7, wherein further comprising the steps of:
Prompting operation person imports following time and date; With
According to the time and date in future of operator input, determine the position of one or more satellites.
9. method according to claim 1, wherein the step of the position of definite one or more satellites adopts the satellite ephemeris data at least one that is stored in user terminal and gateway.
10. method according to claim 9 is stored in the situation of user terminal for satellite ephemeris, also comprises an initial step, is used for all or part of satellite ephemeris data from gateway by at least one satellite transmission to user terminal.
11. method according to claim 1, it comprises an initial step as described below:
In user terminal, produce a service request; With
Service request is passed through at least one satellite transmission to gateway from user terminal;
Wherein determining step is carried out in gateway;
And displaying step wherein comprises an initial step, is used for instruction is passed through at least one satellite transmission to user terminal from gateway.
12. method according to claim 11, wherein transfer step adopts the code division multiple access transmission method.
13. a satellite communication system has a plurality of earth-orbiting satellites, at least one terrestrial user terminal and at least one ground gateway, this system comprises:
The device that in described system, is used for the position of definite user terminal;
In described system, be used for determining the device of one or more satellites with respect to the position of determined user terminal location;
In described system, be used for according to the position of determined user terminal and the position of determined one or more satellites, determine the device of the position of user terminal, the position of the described user terminal in back can provide best communication path between user terminal and one or more satellite; With
Be used for showing the device of instruction, this determined position of instruction indication to the operator of user terminal.
14. system according to claim 13, wherein said user terminal is made of in described definite device at least one.
15. system according to claim 13, wherein said gateway is made of in described definite device at least one.
16. system according to claim 13, wherein at least one described definite device is arranged at least one of described a plurality of satellites.
17. system according to claim 13, the wherein said device that is used for the position of definite user terminal comprises the device that is used for pointing out to the operator information of the environment of importing the expression user terminal; And the wherein said device of definite this position that is used for is in response to the signal by operator's input.
18. system according to claim 13, the wherein said device that is used for the position of definite one or more satellites adopts current time and date.
19. system according to claim 13, the wherein said device that is used for the position of definite one or more satellites adopts following time and date.
20. system according to claim 19 also comprises being used for the device that prompting operation person imports following time and date.
21. system according to claim 13 also is included in the device that is used for the storing satellite ephemeris data in the described system, and the wherein said device that is used for the position of definite one or more satellites adopts the satellite ephemeris data of storage.
22. system according to claim 13, wherein said user terminal comprises and is used to produce the device of service request and is used for service request from described user terminal by at least one satellite transmission to the device of described gateway; And wherein said gateway also comprises and is used for instruction is passed through the device of at least one satellite transmission to described user terminal from described gateway.
23. system according to claim 22, the wherein said device that is used to transmit all adopts the code division multiple access transmission method.
24. a method of moving satellite communication system, this system have a plurality of earth-orbiting satellites, at least one terrestrial user terminal and at least one ground gateway, this method may further comprise the steps:
Determine the position of user terminal;
Determine the position of one or more satellites with respect to determined user terminal location;
According to the position of determined user terminal and the position of determined one or more satellites, determine the position of user terminal, the position of the described user terminal in back can provide best communication path between user terminal and one or more satellite; With
Transmit information to user terminal, this information is indicated determined position.
25. method according to claim 24 comprises that also the information that will be transmitted shows the operator's of user terminal step with the understandable form of operator.
26. method according to claim 24, the information that also comprises employing and transmitted change user terminal with respect to the antenna of the position of the position of determined one or more satellites and/or the user terminal orientation with respect to the position of determined one or more satellites.
27. method according to claim 24, wherein said transfer step comprise information is passed through the step of at least one satellite transmission to user terminal from least one ground gateway.
28. method according to claim 24, wherein the step of the position of definite one or more satellites is determined the position of following certain time.
29. method according to claim 24 is further comprising the steps of:
The information that is transmitted is showed the operator of user terminal with the understandable form of operator;
Adopt the information that is transmitted to change position and/or the orientation of user terminal with respect to the position of determined one or more satellites;
By in a plurality of satellites at least one, between user terminal and at least one ground gateway, set up sound and/or data link.
30. method according to claim 29 is further comprising the steps of during setting up communication link:
Determine the latest position of one or more satellites with respect to user terminal;
According to the position of user terminal and the latest position of determined one or more satellites, determine the latest position of user terminal, the latest position of this user terminal can provide the optimal communication path between user terminal and one or more satellite;
Transmit information to user terminal, the information that is transmitted is indicated determined latest position;
The information that is transmitted is showed the operator of user terminal with the understandable form of operator;
Adopt the information that is transmitted to change position and/or the orientation of user terminal with respect to the latest position of determined one or more satellites;
Keep by in a plurality of satellites at least one, between user terminal and at least one ground gateway, set up sound and/or data link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96121614 CN1155192A (en) | 1995-11-17 | 1996-11-15 | Mobile satellite user information request system and method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US559,081 | 1995-11-17 | ||
| CN 96121614 CN1155192A (en) | 1995-11-17 | 1996-11-15 | Mobile satellite user information request system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1155192A true CN1155192A (en) | 1997-07-23 |
Family
ID=5126954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96121614 Pending CN1155192A (en) | 1995-11-17 | 1996-11-15 | Mobile satellite user information request system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1155192A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105008958A (en) * | 2013-03-08 | 2015-10-28 | 高通股份有限公司 | Method and apparatus for enabling the use of global navigation satellite system (GNSS) signals indoors |
| CN108702200A (en) * | 2016-02-15 | 2018-10-23 | 高通股份有限公司 | Ephemeris information management for satellite communication |
| WO2020098627A1 (en) * | 2018-11-12 | 2020-05-22 | 华为技术有限公司 | Satellite communication method, device and system |
| RU2787012C2 (en) * | 2018-11-12 | 2022-12-28 | Хуавей Текнолоджиз Ко., Лтд. | Satellite communication system, device, and method |
-
1996
- 1996-11-15 CN CN 96121614 patent/CN1155192A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105008958A (en) * | 2013-03-08 | 2015-10-28 | 高通股份有限公司 | Method and apparatus for enabling the use of global navigation satellite system (GNSS) signals indoors |
| CN108702200A (en) * | 2016-02-15 | 2018-10-23 | 高通股份有限公司 | Ephemeris information management for satellite communication |
| CN108702200B (en) * | 2016-02-15 | 2021-05-28 | 高通股份有限公司 | Ephemeris information management for satellite communications |
| US11041959B2 (en) | 2016-02-15 | 2021-06-22 | Qualcomm Incorporated | Ephemeris information management for satellite communication |
| WO2020098627A1 (en) * | 2018-11-12 | 2020-05-22 | 华为技术有限公司 | Satellite communication method, device and system |
| RU2787012C2 (en) * | 2018-11-12 | 2022-12-28 | Хуавей Текнолоджиз Ко., Лтд. | Satellite communication system, device, and method |
| US11997725B2 (en) | 2018-11-12 | 2024-05-28 | Huawei Technologies Co., Ltd. | Satellite communication method, apparatus, and system |
| RU2801689C2 (en) * | 2019-03-26 | 2023-08-14 | Хуавэй Текнолоджиз Ко., Лтд. | Switching method and device in satellite communications |
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