CN102457332A - Method, device and system for fixing position of mobile terminal - Google Patents
Method, device and system for fixing position of mobile terminal Download PDFInfo
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- CN102457332A CN102457332A CN2010105301721A CN201010530172A CN102457332A CN 102457332 A CN102457332 A CN 102457332A CN 2010105301721 A CN2010105301721 A CN 2010105301721A CN 201010530172 A CN201010530172 A CN 201010530172A CN 102457332 A CN102457332 A CN 102457332A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W12/08—Access security
Abstract
The invention discloses a method for fixing the position of a mobile terminal. The method comprises the following steps: modulating carrier signals by using codes specific to an acoustic wave signal source device; emitting modulated acoustic wave signals at a specific frequency by using the acoustic wave signal source device; receiving the acoustic wave signals by using the mobile terminal; demodulating the received acoustic wave signals so as to obtain codes specific to the acoustic wave signal source device; and based on correspondence between the codes and position of the acoustic wave signal source device, fixing the position of the mobile terminal. The invention also relates to an acoustic wave signal source device for assisting the fixing of the position of a mobile terminal, a corresponding mobile terminal and a system formed by the acoustic wave signal source device and the mobile terminal. By using the method and system disclosed by the invention, acoustic wave can be used as a carrier of information required in the fixing of position of a mobile terminal, therefore the position of the mobile terminal can be fixed in the fields in which other positioning techniques can not be used.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to a kind of location technology of utilizing sound wave to confirm the position of portable terminal.
Background technology
Along with portable terminal is widely used, the technology that portable terminal is positioned also is required day by day with service and grows up.For example; The household hopes the old mobile phone users of going out is separately positioned so that the assistance of safety and health aspect in time is provided; Enterprise hopes employee's mobile phone users is positioned so that carry out suitable at any time and management efficiently; Fleet hopes driver's mobile phone users is positioned so that carry out reasonable and economic scheduling or the like at any time, and these all are typical application scenes of portable terminal positioning service.
Present portable terminal location technology mainly comprises: based on the location of GPS (global positioning system), based on the location of the base station of moving operation network, based on bluetooth and based on the location of WiFi focus.
Based on the location technology of GPS mainly is to send the navigation information that is used to locate by gps satellite, directly realizes self poisoning (such as latitude and longitude coordinates) or utilizes specific locating platform to realize self poisoning (showing such as map) after receiving this information by the GPS receiver module on the portable terminal.Yet GPS can not realize indoor positioning in the location.This is because the key of GPS location is a receiver carries out data processing through the signal that receives satellites transmits and obtain position coordinate, therefore anyly influences factor that gps signal receives and all possibly cause the GPS location inaccurate even can not locate fully.And the housing-group building stops one of obstacle that the used information carrier of GPS is propagated just.And, be not that all portable terminals all have the GPS of carrying out and locate necessary GPS receiver module.
Based on the location of the base station of moving operation network can comprise location technology again based on Cell Identity CI (Cell-ID), based on the location technology etc. of the TOA time of advent.This type technology mainly is to have utilized the position data of approaching sub-district of portable terminal or base station to estimate the position of portable terminal, for example confirms the position of portable terminal through the relatively move measuring and calculating of distance at terminal of base station.The characteristics of this location technology are to have utilized existing mobile communication network, need not existing network and portable terminal are carried out bigger change (for example not needing portable terminal to have the GPS locating module), therefore are easy to realize.Regrettably, the positioning accuracy of this location technology is lower, because its precision largely depends on the distribution of base station and the size of coverage, has time error to surpass one kilometer, therefore can not satisfy the more requirement of fine granularity location.
Bluetooth is a kind of Radio Transmission Technology of short distance low-power consumption, supports point-to-point, the speech of putting multiple spot and data service, can realize that the short-distance wireless between the distinct device is interconnected.At the suitable bluetooth local area network access point of indoor installation; Become basic network connection mode to network configuration based on the multi-user; And guarantee that the bluetooth local area network access point is the main equipment (master) of this piconet (piconet) all the time; Just can obtain user position information, realize utilizing the purpose of Bluetooth technology location.Adopt this technology can carry out indoor short distance location, its advantage is to find that easily portable terminal and signal transmission do not receive the influence of sighting distance, and shortcoming is that present bluetooth devices and equipment price are expensive, utilizes it to come localisation of mobile terminals not have cost benefit.Other can act on the technology that portable terminal is used for indoor short distance location and for example also have the location based on the WiFi focus, and are the same with the bluetooth location technology, and WiFi focus location technology is faced with that the hardware supports rate is low, the shortcoming of narrow in application range.
In this case,, utilize the existing hardware of portable terminal to constitute and the higher location of function realization precision if can find a kind of novel portable terminal location technology, very favorable beyond doubt.
Summary of the invention
To the above-mentioned defective of prior art, the present invention proposes a kind of method, equipment and system that utilizes sound wave to carry out the portable terminal location.Inventor of the present invention finds that the frequency of sound wave that can hear is 20Hz-20KHz, so the frequency response range of the microphone of general portable terminal is 20Hz-20KHz.But for the HFS in this frequency range, about 16KHz-20KHz, common people can't hear.Utilize this characteristic, the sound wave of this frequency range is received the carrier of positioning auxiliary information, the location that can realize portable terminal as portable terminal.
According to a first aspect of the invention, a kind of method that is used for the position of definite portable terminal is provided, may further comprise the steps: a utilizes and specific to the coding of acoustic signals source device carrier signal is modulated; B launches modulated acoustic signals by the acoustic signals source device on CF; C receives said acoustic signals by portable terminal; D carries out demodulation to obtain said coding specific to the acoustic signals source device to the said acoustic signals that receives; And e confirms the position of portable terminal according to said coding.
According to a second aspect of the invention, a kind of auxiliary acoustic signals source device of confirming the position of portable terminal that is used for is provided, comprising: the acoustic signals modulating device is used to utilize the coding specific to self that carrier signal is modulated; And the acoustic signals emitter, be used for this modulated acoustic signals of emission on CF.
According to a third aspect of the invention we, a kind of portable terminal is provided, has comprised the acoustic signals receiving system, be used to receive acoustic signals source device emitting sound wave signal on CF; The acoustic signals demodulating equipment is used for the said acoustic signals that receives is carried out demodulation to obtain the coding specific to said acoustic signals source device; And data processing equipment, be used for confirming the position of said portable terminal according to said coding.
According to a forth aspect of the invention, a kind of system that is used for the position of definite portable terminal is provided, has comprised according to the described acoustic signals source device of second aspect present invention with according to the described portable terminal of third aspect present invention.
According to a fifth aspect of the invention, a kind of portable terminal is provided, has comprised: the acoustic signals receiving system is used to receive acoustic signals source device emitting sound wave signal on CF; The acoustic signals demodulating equipment is used for the said acoustic signals that receives is carried out demodulation to obtain the coding specific to the acoustic signals source device; And data transmission/receiving system, be used for coding is sent to server to confirm the position of said portable terminal.
According to a sixth aspect of the invention, a kind of system that is used for the position of definite portable terminal is provided, has comprised according to the described acoustic signals source device of second aspect present invention with according to the described portable terminal of fifth aspect present invention; And server, be used for receiving and confirming the position of said portable terminal according to this coding from said portable terminal.
According to a seventh aspect of the invention, a kind of system that is used for the position of definite portable terminal is provided, has comprised according to the described acoustic signals source device of second aspect present invention; Portable terminal, it comprises: the acoustic signals receiving system is used to receive said acoustic signals; With data transmission/receiving system, be used for this acoustic signals that receives is sent to server; And server, it comprises: data transmission/receiving system is used to receive the acoustic signals that said portable terminal sends; The acoustic signals demodulating equipment is used for the said acoustic signals that receives is carried out demodulation to obtain said coding specific to the acoustic signals source device; And data processing equipment, be used for position according to the definite said portable terminal of coding.
For foregoing various prior aries; Acoustic location technology of the present invention has comprehensive advantage: it can realize indoor accurate location (positioning accuracy is 5-10m) of waiting in the enclosure space environment through in position arranging a plurality of acoustic signal sources; Its existing structure and function based on portable terminal realizes simultaneously; Need not have portable terminal now increases complex structure or expensive special module, and therefore acquisition is extensively promoted the use of easily.
Description of drawings
Come in conjunction with the drawings can obtain better understanding to principle of the present invention, feature and advantage with reference to hereinafter to the description of specific embodiment.Identical or corresponding label is represented corresponding or identical part in the accompanying drawing:
Fig. 1 is a schematic block diagram according to an embodiment of the invention, that be used for the system of definite mobile terminal locations;
Fig. 2 is a schematic block diagram according to another embodiment of the invention, that be used for the system of definite mobile terminal locations;
Fig. 3 is an indicative flowchart according to an embodiment of the invention, that be used for the method for definite mobile terminal locations;
Fig. 4 A-Fig. 4 B is an indicative flowchart according to another embodiment of the invention, that be used for the method for definite mobile terminal locations;
Fig. 5 A is a schematic block diagram according to an embodiment of the invention, that be used for the acoustic signals source device of auxiliary definite mobile terminal locations;
Fig. 5 B is a schematic block diagram according to another embodiment of the invention, that be used for the acoustic signals source device of auxiliary definite mobile terminal locations;
Fig. 6 A is a schematic block diagram according to an embodiment of the invention, that be used for the portable terminal of definite mobile terminal locations;
Fig. 6 B is a schematic block diagram according to another embodiment of the invention, that be used for the portable terminal of definite mobile terminal locations.
Embodiment
According to the present invention, can arrange a plurality of acoustic signals source devices in to the portable terminal positioned area at needs, each acoustic signal source devices allocation has a specific coding.The position of the acoustic signals source device that this coding is corresponding with it has relation one to one, and this relation is known by portable terminal or server in advance.Each acoustic signals source device continues or launches termly with this code modulated CF acoustic signals; Portable terminal receives certain acoustic signals source device emitting sound wave signal at certain point; This acoustic signals is carried out demodulation, obtain and this acoustic signals source device corresponding codes.Portable terminal or server go out the position of sound wave signal source equipment according to this code parsing, think that the position of portable terminal is in this acoustic signals source device place.In context of the present invention, for example, acoustic signals source device of placement in each diameter is the zone of 5-10m, thus portable terminal to the distance of acoustic signals source device smaller or equal to 5-10m, promptly positioning accuracy can reach 5-10m.In the application of reality, according to the noise situations of localizing environment, the placement density of acoustic signals source device can be different with scheme, and this positioning accuracy is also different thereupon.
That Fig. 1 shows is according to an embodiment of the invention, be used for confirming the schematic block diagram of the system of mobile terminal locations.System 1 comprises acoustic signals source device 50 and portable terminal 60.As shown in the figure; Acoustic signals source device 50 at CF (preferably; 16KHz-20KHz) go up the emission acoustic signals, this acoustic signals is modulated with these acoustic signals source device 50 pairing unique codings in advance, therefore carries the coded message of assist location.Portable terminal 60 receives this acoustic signals, and from this acoustic signals, demodulates this unique coding corresponding to this acoustic signals source device 50, the i.e. coded message of assist location.According to this coding, portable terminal 60 can be confirmed self-position.Particularly, portable terminal 60 can find the position of this acoustic signals source device 50 according to the coding of this acoustic signals source device 50 of prior storage and the mapping table of its position.For example, being encoded to the corresponding position of 001 equipment is No. 11 positions, the 2nd buildings, eastern annex 3 districts, and the position that is encoded to 010 equipment correspondence is No. 3 positions, the 2nd buildings, western annex 1 district etc.Perhaps portable terminal 60 is known the definition rule of the coding of acoustic signals source device 50 in advance; Utilization should rule can directly be positional information with code parsing; For example coding itself is a string number; The 1-3 bit digital is represented building name, and the 4th bit digital is represented floor, the predefine zone in this floor of the 5th bit representation.In context of the present invention, think that the pairing acoustic signals source device 50 of acoustic signals that portable terminal 60 receives with it is in same position.
In addition, with shown in the dotted line, portable terminal 60 comprises acoustic signals receiving system, acoustic signals demodulating equipment and data processing equipment in figure.This is to come simply to illustrate with respect to the internal structure of the portable terminal in the system 1 ' of Fig. 2.About the further details of these devices, will combine other accompanying drawings to explain hereinafter.
Fig. 2 shows schematic block diagram according to another embodiment of the invention, that be used for the system of definite mobile terminal locations.System 1 ' comprises acoustic signals source device 50, portable terminal 60 and server 70.With system shown in Figure 11 ' similarly; Acoustic signals source device 50 at CF (preferably; 16KHz-20KHz) go up the emission acoustic signals, this acoustic signals is modulated with these acoustic signals source device 50 pairing unique codings in advance, therefore carries the coded message of assist location.Portable terminal 60 receives this acoustic signals, and from this acoustic signals, demodulates this unique coding corresponding to this acoustic signals source device 50, the i.e. coded message of assist location.As shown in Figure 2, different with system shown in Figure 11 ' is that portable terminal 60 does not utilize data processing equipment to resolve this coded message, but utilizes data transmission/receiving system that the coded message that demodulates is sent to server 70.Server 70 comprises corresponding data transmission/receiving system and data processing equipment, and the former is used for receiving this coded message from portable terminal 60, and the latter then confirms the position of portable terminal according to this coding.Particularly, server 70 can find the position of this acoustic signals source device 50 according to the coding of this acoustic signals source device 50 of prior storage and the mapping table of its position.For example, being encoded to the corresponding position of 001 equipment is No. 11 positions, the 2nd buildings, eastern annex 3 districts, and the position that is encoded to 010 equipment correspondence is No. 3 positions, the 2nd buildings, western annex 1 district etc.Perhaps portable terminal 60 is known the definition rule of the coding of acoustic signals source device 50 in advance; Utilization should rule can directly be positional information with code parsing; For example coding itself is a string number; The 1-3 bit digital is represented building name, and the 4th bit digital is represented floor, the predefine zone in this floor of the 5th bit representation.In context of the present invention, think that the pairing acoustic signals source device 50 of acoustic signals that portable terminal 60 receives with it is in same position.
Can see system shown in Figure 11 is whether comprise server 70 with the difference of system shown in Figure 21 '.Its essence difference is realize in which equipment according to the data processing function that coding positions.If come coded message is resolved by portable terminal 60, further to obtain positional information, then needn't comprise server 70 in the system, that is, in portable terminal, realize positioning function.Otherwise, if can't help portable terminal 60 comes coded message is resolved further to obtain positional information, then comprise server 70 in the system, carry out this positioning function by this server.
According to another embodiment of the invention, can further the acoustic signals demodulation function in the portable terminal be transplanted to server side, constitute (not shown) thereby form another system.Wherein system comprises acoustic signals source device 50, portable terminal 60 and server 70.Different with system shown in Figure 21 ' is; Portable terminal 60 only receives the acoustic signals that acoustic signals source device 50 sends; And this acoustic signals is transmitted to server 70, carry out by server 70 acoustic signals is carried out demodulation, code signal is resolved to obtain the function of positional information.In the utilization of reality, maybe be from the consideration of bandwidth, this system of less employing constitutes scheme, but it still can utilize principle of the present invention to realize, also therefore falls within the scope of the present invention.
With reference to figure 3 and Fig. 4 the method that is used for confirming portable terminal according to of the present invention is described below.At first with reference to figure 3, method begins in step 300.In step 301, utilize and carrier signal is modulated specific to the coding of acoustic signals source device.At first; Define unique coding, for example, select the perhaps unique character express information of its unique Arabic numerals numbering as information itself corresponding to the acoustic signals source device; This information is carried out binary coding, obtain a string binary symbol sequence of forming by " 1 " and " 0 ".Square wave so that binary symbol sequence is corresponding is modulated the carrier wave body as modulation signal.At this, carrier signal means the sound wave that does not add modulation.As previously mentioned, the frequency that people's ear can be heard is between 20Hz-20KHz, and HFS 16KHz-20KHz wherein has been not easy to be heard by people's ear.In the present invention, the sound wave of selecting this frequency range just preferably for example selects 18KHz as carrier frequency as modulated carrier wave body.Modulation scheme can adopt multiple digital modulation known in those skilled in the art such as amplitude-shift keying, frequency shift keying, phase-shift keying and differential phase keying.
In step 302, on this CF, launch this modulated acoustic signals by the acoustic signals source device.At this, the actual frequency of the acoustic signals that CF is promptly modulated, it is original frequency of carrier, for example 18KHz under the situation of amplitude modulation.Under the situation of frequency modulation, for example select frequency 20KHz to represent symbol " 1 ", and 18KHz represent " 0 ", then this CF is between 18-20KHz.
In step 303, receive said acoustic signals by portable terminal.Present portable terminal all has the device that is used to receive audible sound, for example microphone.As well known to a person skilled in the art that when utilizing portable terminal to carry out operation such as call or multimedia recording, microphone is used for mobile terminal receive user's voice signal.Likewise, when utilizing portable terminal to carry out like positioning action of the present invention, microphone capable of using receives the acoustic signals that carries the coded message that is used for assist location.
In step 304, the acoustic signals that receives is carried out demodulation to obtain the coding specific to the acoustic signals source device.For this reason, corresponding acoustic signals demodulating equipment need adopt the demodulation scheme corresponding with modulation scheme that modulation signal is carried out rectification, therefrom obtains the square-wave signal that is used to modulate.And according to the pairing binary symbol sequence of square-wave signal, through obtaining coded message itself with the corresponding decoding process of coded system.This coded message for example can be unique Arabic numerals numbering of acoustic signals source device, perhaps can be unique text description information.As previously mentioned, this demodulation step both can be accomplished at portable terminal, also can be accomplished by server.
In step 305, confirm the position of said portable terminal according to said coding.As an example, corresponding data processing equipment is stored the coding of acoustic signals source device and the mapping table of position in advance, after obtaining to encode, can obtain the positional information of acoustic signals source device through searching this mapping table.As another example, itself can represent the position of this equipment the coding of acoustic signals source device.For example according to the establishment rule of predefined, a big zone is divided into 5 districts, then 5-1-1 can represent first quartile in first district, and 5-3-4 can represent the four-quadrant in the 3rd district.Thus, need not keep the mapping table of coding and position, can derive positional information intuitively from the coding that obtains.As previously mentioned, this positioning step both can be accomplished by portable terminal, also can be accomplished by server.In step 306, method finishes.
Fig. 4 A-Fig. 4 B shows indicative flowchart according to another embodiment of the invention, that be used for the method for definite mobile terminal locations.In Fig. 4 A, method begins in step 400.In step 401, for the purpose of safety, judge whether and to encrypt coding.If then in step 402, coded message is encrypted.Can adopt any numeric coding scheme well known to those skilled in the art that coding is encrypted with the binary symbol sequence that obtains encrypting or the coding of encryption.As important use example of the present invention, can adopt dynamic that coding is encrypted.This dynamic maker is parameter with time, adopts such as methods such as multiple password table AESs and generates dynamic.This with time be parameter dynamic only in the certain hour section effectively, and can only use once, so fail safe is very high.Correspondingly; When deciphering, must utilize correct dynamic; If illegality equipment passes through to play once more behind the recording acoustic signals, will lose efficacy owing to the dynamic that time delay causes the entrained coded message of acoustic signals to comprise, and can't obtain correct coded message.Should be noted that under the situation of utilizing dynamic to encrypt it is synchronous that the clock of transmitting terminal and receiving terminal should keep.
If, then directly do not jump to step 403.In step 403, be similar to step 301, for example carrier wave is modulated the acoustic signals that obtains modulating specific to the pairing square wave of the binary symbol sequence of acoustic signals source device.In step 404, be similar to step 302, on CF, launch modulated acoustic signals by the acoustic signals source device.In step 405, judge whether to need to change locating accuracy.In the present invention, owing to utilize sound wave as the carrier that diffuses information, the propagation distance of sound wave from the acoustic signals source device to portable terminal is locating accuracy.The scope that each acoustic signals source device is covered, promptly the distance of portable terminal how far can receive this sound wave, is the key factor that influences positioning accuracy.This scope generally depends on the transmitting power of acoustic signals source device.Have flexibility ground, when needs changed positioning accuracy, method changed step 406 over to, wherein changes the transmitting power of acoustic signals source device, the transmitting power of its loud speaker for example, thus the coverage of adjustment acoustic signals source device changes positioning accuracy thus.
If need not change positioning accuracy, then method proceeds to step 407, need wherein to judge whether the self adaptation adjustment.In the application of reality, there are various noises inevitably in the residing environment of acoustic signals source device.When ambient noise level changes when violent, if the volume of acoustic signals remains unchanged, may influence the reception of portable terminal to acoustic signals, and then the realization of influence location.At this moment, need carry out the self adaptation adjustment, so that the coverage of acoustic signals source device keeps stable to the transmitting power of acoustic signals.In this case, method changes step 408 over to, wherein utilizes the noises that device detects or collection is extraneous such as microphone, according to the result who detects, the transmitting power of acoustic signals is carried out the self adaptation adjustment, promptly changes transmitting power (step 406).For example when environmental volume is big, need correspondingly improve the transmitting power of acoustic signals; When environmental volume hour, can correspondingly reduce the transmitting power of acoustic signals.After this, method gets into continued frame 409.Step 400-408 all is to be the operation that transmitting terminal carries out at acoustic signals source device place, and follow-up step 410-425 then is to be the operation that receiving terminal carries out at portable terminal or server place.
In Fig. 4 B, continue aforesaid the inventive method.In step 410, receive acoustic signals by portable terminal.This reception can be a kind of real-time reception, and for example mobile phone users is selected to open under the situation of positioning function, and microphone is in running order all the time, handles to the acoustic signals demodulating equipment specific acoustic wave signal forwarding that receives at any time.This reception also can be that the user triggers, and is for example notified need position the time manually opened microphone to receive as the user.
Then, in step 411, judge whether to carry out demodulation process at the portable terminal place.If then method changes step 412 over to.By portable terminal acoustic signals is carried out demodulation.Step 304 among this procedure and Fig. 3 is similar, therefore repeats no more.If not, then method changes step 419 over to, and acoustic signals is sent to server.For example can this acoustic signals be sent as one section recording data through existing data transmission network.In step 420, server carries out demodulation to be similar to the mode of portable terminal to acoustic signals.In step 413 and 421, whether encrypt according to the coded message that acoustic signals is entrained, judge whether and need decipher.If, then in step 414 and 422, binary symbol sequence is deciphered to obtain the coded message specific to the acoustic signals source device with the corresponding decrypt scheme of transmitting terminal.If not, then in step 415 and 423, directly obtain coded message specific to the acoustic signals source device.Then, when carrying out at portable terminal under the situation of above-mentioned processing, in step 416, further judge whether to position processing at portable terminal.If then method changes step 418 over to, wherein portable terminal is confirmed positional information according to coded message.If not; Then method changes step 417 over to, and wherein portable terminal sends to server with coded message, then in step 424; Identical ground with the subsequent step that in server, carries out the acoustic signals demodulation process is confirmed positional information by server according to coded message.At last, in step 425, method finishes.
Can see that according to the realization at diverse location of the function of different phase, the present invention can have numerous embodiments, and is not limited to shown in the exemplary process flow chart these.
Fig. 5 A shows the schematic block diagram of acoustic signals source device 50 according to an embodiment of the invention.Shown in Fig. 5 A; Acoustic signals source device 50 comprises acoustic signals modulating device 501; This device receives the digital baseband signal corresponding to acoustic signals source device specific coding binary symbol sequence that information source is sent on the one hand, receives the modulated carrier signal of treating that is suitable for transmitting on the other hand.In acoustic signals modulating device 501; Utilize the binary digit baseband signal carrier wave to be carried out digital modulation such as amplitude-shift keying, frequency shift keying, phase-shift keying and differential phase keying; Produce acoustic signals, then acoustic signals is transferred to acoustic signals emitter 502.Acoustic signals emitter 502 is the devices that are suitable for to external world's emission sound wave, and it for example is loud speaker or sound despot.
Fig. 5 B shows the schematic block diagram of acoustic signals source device 50 ' according to another embodiment of the invention.Acoustic signals source device 50 ' shown in Fig. 5 B is compared with the acoustic signals source device 50 shown in Fig. 5 A; Except acoustic signals modulating device 501 and sound wave sender unit 502, also comprise encryption device 503, output control device 504 and adaptive power adjusting device 505.
Wherein, encryption device 503 is used for the coding specific to acoustic signals source device 50 is carried out encryption.Can adopt any numeric coding scheme well known to those skilled in the art that coding is encrypted with the binary symbol sequence that obtains encrypting or the coding of encryption.As important use example of the present invention, can adopt dynamic that coding is encrypted.This dynamic maker is parameter with time, adopts such as methods such as multiple password table AESs and generates dynamic.This with time be parameter dynamic only in the certain hour section effectively, and can only use once, so fail safe is very high.Correspondingly; When deciphering, must utilize correct dynamic; If illegality equipment passes through to play once more behind the recording acoustic signals, will lose efficacy owing to the dynamic that time delay causes the entrained coded message of acoustic signals to comprise, and can't obtain correct coded message.Should be noted that under the situation of utilizing dynamic to encrypt it is synchronous that the clock of transmitting terminal and receiving terminal should keep.
Adaptive power adjusting device 505 for example comprises microphone with sound receiving function, sound transducer etc.; Be used to detect or gather extraneous noise; And to confirm to improve according to testing result still be the reduction volume; Volume control signal is sent to output control device 504, control by its transmitting power to the acoustic signals emitter.
That Fig. 6 A shows is according to an embodiment of the invention, be used for confirming the schematic block diagram of the portable terminal of mobile terminal locations.Portable terminal 60 comprises acoustic signals receiving system 601, acoustic signals demodulating equipment 602, optional decryption device 603 and data processing equipment 603.Acoustic signals receiving system 601 for example is the microphone that portable terminal had, and is used for as near the acoustic signals such direct reception when the call.Usually, the frequency response range that this acoustic signals receiving system 601 has covers the frequency range of acoustic signals to be received, i.e. 16KHz-20KHz.Afterwards, acoustic signals receiving system 601 is forwarded to acoustic signals demodulating equipment 602 with the acoustic signals that receives
602 pairs of acoustic signals of acoustic signals demodulating equipment carry out demodulation, obtain specific to the coding of transmitting terminal acoustic signals source device.Particularly, acoustic signals demodulating equipment 602 needs to adopt the demodulation scheme corresponding with modulation scheme that modulation signal is carried out rectification, therefrom obtains the square-wave signal that is used to modulate.And according to the pairing binary symbol sequence of square-wave signal, through obtaining coded message itself with the corresponding decoding process of coded system.This coded message for example can be unique Arabic numerals numbering of acoustic signals source device, perhaps can be unique text description information.
As shown in the figure, portable terminal 60 can also comprise decryption device 603 alternatively.If the modulation intelligence that is comprised in the acoustic signals that is received then needs this decryption device 603 to carry out corresponding decryption processing through encrypting.For example, the baseband signal that the demodulation of acoustic signals demodulating equipment is come out is encrypted through dynamic, then correspondingly, it is carried out the dynamic decryption processing, to obtain corresponding coding information.As among Fig. 6 B with shown in the frame of broken lines, it is necessary that decryption device 603 is not portable terminal 60.
Then, decryption device 603 sends to data processing equipment 604 with this coding and positions.Data processing equipment 604 for example is the processor of portable terminal 60; It possibly store the mapping table of coded message and positional information in advance; Also possibly know the redaction rule of coding in advance, directly search corresponding position information from mapping table and perhaps resolve the positional information that obtains implying according to redaction rule.The position of the said acoustic signals source device through discerning said coding itself expression or the coding through searching said acoustic signals source device and the mapping table of position; Confirm the position of said acoustic signals source device, thereby confirm that said portable terminal is positioned at the position of said acoustic signals source device.As previously mentioned; In context of the present invention; For example arrange a plurality of acoustic signals source devices within the specific limits, the coverage of supposing each acoustic signals source device is the circle of 5 meters of diameters, and then portable terminal receives under the situation of some acoustic signals source devices; Think that this portable terminal is positioned at this acoustic signals source device place, this positioning accuracy can be reached within 5 meters.
As previously mentioned; Positioning function can not carried out at mobile terminal side, and in this case, portable terminal can not comprise this data processing equipment; Position by it but will locate the code used server that sends to, hereinafter will combine Fig. 6 B that respective embodiments is described.
Fig. 6 B shows schematic block diagram according to another embodiment of the invention, that be used for the portable terminal of definite mobile terminal locations.Portable terminal 60 ' shown in Fig. 6 B is compared with the portable terminal 60 shown in Fig. 6 A; Except comprising acoustic signals receiving system 601, acoustic signals demodulating equipment 602, optional decryption device 603, data processing equipment 604 is replaced with data transmission/receiving system 605.The coded message that data transmission/receiving system 605 is responsible for demodulation is come out sends to server, is positioned by it.In another embodiment of the present invention, this data transmission/receiving system even can carry out a series of subsequent operations such as demodulation, deciphering and even location by it with directly not sending to server through the acoustic signals of demodulation.
When server was carried out these operations, its formation and function and corresponding mobile terminal were basic identical, for fear of obscuring, at this also these formations and the operation of server were shown no longer.Need to prove; After server obtains the positional information of portable terminal; Server can be labeled in the positional information of portable terminal on the map platform, perhaps it is offered other users (for example, the dispatcher of enterprise, family members etc.) that need to be grasped mobile terminal user position information.In addition, as required, server also can send it back portable terminal with this positional information and supply it to understand self present position.Preferably, server can also send to corresponding portable terminal with other information relevant with the portable terminal present position.Other information comprise and can carry out the information of the information of mutual information, near communal facility, near trade company or other information relevant with said portable terminal present position with near other users.For example, locating information shows that mobile phone users gets into certain commercial building, then server can with this commercial building in shop number or relevant shop discounting sales promotion information send to portable terminal and supply its understanding.Server also can offer portable terminal with the information of facilities such as near the subway station this commercial building, gas station.In a preferred embodiment, server can also offer mobile phone users with the positional information that is in other registered users in this commercial building simultaneously, makes it find understanding or interested target person to carry out interaction with it.The propelling movement that should be noted that these information can be automatically, also can answer the requirement of mobile phone users to trigger.
More than the preferred embodiments of the present invention have been carried out nonrestrictive description.It will be appreciated by those skilled in the art that under the situation that does not break away from design of the present invention and scope, can make many other changes and remodeling the present invention.Should be appreciated that to the invention is not restricted to described specific implementations, scope of the present invention only is defined by the following claims.
Claims (10)
1. method that is used for confirming the position of portable terminal may further comprise the steps:
A utilizes and specific to the coding of acoustic signals source device carrier signal is modulated;
B launches modulated acoustic signals by the acoustic signals source device on CF;
C receives said acoustic signals by portable terminal;
D carries out demodulation to obtain said coding specific to the acoustic signals source device to the said acoustic signals that receives; And
E confirms the position of said portable terminal according to said coding.
2. method according to claim 1, wherein said CF is between 16KHz-20KHz.
3. method according to claim 1 and 2, wherein step e also comprises:
The position of the said acoustic signals source device through discerning said coding itself expression or the coding through searching said acoustic signals source device and the mapping table of position; Confirm the position of said acoustic signals source device, thereby confirm that said portable terminal is positioned at the position of said acoustic signals source device.
4. one kind is used for the auxiliary acoustic signals source device of confirming the position of portable terminal, comprising:
The acoustic signals modulating device is used to utilize the coding specific to self that carrier signal is modulated; And
The acoustic signals emitter is used for this modulated acoustic signals of emission on CF.
5. acoustic signals source device according to claim 4, wherein said CF is between 16KHz-20KHz.
6. portable terminal comprises:
The acoustic signals receiving system is used to receive acoustic signals source device emitting sound wave signal on CF;
The acoustic signals demodulating equipment is used for the said acoustic signals that receives is carried out demodulation to obtain the coding specific to said acoustic signals source device; And
Data processing equipment is used for confirming according to said coding the position of said portable terminal.
7. system that is used for confirming the position of portable terminal comprises:
According to claim 4 or 5 described acoustic signals source devices; And
Portable terminal according to claim 6.
8. portable terminal comprises:
The acoustic signals receiving system is used to receive acoustic signals source device emitting sound wave signal on CF;
The acoustic signals demodulating equipment is used for the said acoustic signals that receives is carried out demodulation to obtain the coding specific to said acoustic signals source device; And
Data transmission/receiving system is used for said coding is sent to server to confirm the position of said portable terminal.
9. system that is used for confirming the position of portable terminal comprises:
According to claim 4 or 5 described acoustic signals source devices;
Portable terminal according to claim 8; And
Server is used for confirming from said portable terminal Receiving coded information and according to said coding the position of said portable terminal.
10. system that is used for confirming the position of portable terminal comprises:
According to claim 4 or 5 described acoustic signals source devices;
Portable terminal, it comprises:
The acoustic signals receiving system is used to receive said acoustic signals; With
Data transmission/receiving system is used for this acoustic signals that receives is sent to server; And
Server, it comprises:
Data transmission/receiving system is used to receive the acoustic signals that said portable terminal sends;
The acoustic signals demodulating equipment is used for the said acoustic signals that receives is carried out demodulation to obtain said coding specific to the acoustic signals source device; With
Data processing equipment is used for confirming according to said coding the position of said portable terminal.
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| CN2010105301721A CN102457332A (en) | 2010-11-02 | 2010-11-02 | Method, device and system for fixing position of mobile terminal |
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| CN2010105301721A CN102457332A (en) | 2010-11-02 | 2010-11-02 | Method, device and system for fixing position of mobile terminal |
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