JP2009270884A - Position measuring terminal, and method and system for measuring position - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position measuring terminal which measures a position even when assist data can not be acquired from a network. <P>SOLUTION: The position measuring terminal 101 receives a broadcast wave 108 containing the assist data consisting of a plurality of navigation messages. An assist data acquiring part 107 acquires the assist data from the received broadcast wave 108. A position measuring part 209 includes in its operation the position measurement by utilizing the acquired assist data. A broadcast wave assist data recognizing part 212 determines whether the assist data are contained in the broadcast wave received by a broadcast wave receiving part 205. In the case where the assist data are determined to be contained in the broadcast wave, the position measuring terminal 101 acquires the assist data from the broadcast wave. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a position positioning terminal, a position positioning method, and a position positioning system, and more specifically, in a UE-Based system that performs positioning calculation on a mobile device side that is an A-GPS (Assisted-GPS) positioning system, The present invention relates to a position positioning procedure in Standardone-GPS positioning that directly receives information necessary at times from a satellite and performs positioning calculation, and a position positioning terminal that executes the position positioning procedure.

  Receives GPS signals transmitted by pseudo-noise encoding from GPS satellites orbiting the earth, decodes the arrival time of GPS signals to the ground, decodes time information and navigation messages included in GPS signals, and position information on the earth A GPS position detection system that accurately measures the position of the GPS has been developed.

  In such a GPS positioning system, at least four GPS satellites orbiting the visible space are captured and the GPS signal is decoded. However, it takes a considerable amount of time to capture the orbiting satellite alone and decode the captured GPS signal. Therefore, a method has been developed in which a navigation message obtained by a GPS reference station that has received a GPS signal is stored in advance in the GPS positioning assist server as assist data. In this method, when there is a request from a position positioning terminal for performing GPS positioning calculation, assist data is sent to the position positioning terminal. The position positioning terminal supplements the information with the transmitted assist data and performs GPS positioning calculation.

  Conventionally, in such an A-GPS (Assisted-GPS) positioning system GPS positioning system, when requested by the positioning terminal, all assist data stored in the GPS positioning assist server is transmitted to the positioning terminal. (For example, refer to Patent Document 1).

  Also, in locations where it is difficult to perform positioning with GPS alone, such as in a building or indoors, a hybrid type location that uses both GPS and the signal from the base station to enable the terminal to perform positioning A positioning method has been reported (for example, see Patent Document 2).

  On the other hand, a law amending part of the Meteorological Business Law (Act No. 115 of 2007) was enacted, promulgating on November 21 of the same year and enacting on December 1 of the same year. As a result of the revision of the law, the Japan Meteorological Agency has implemented forecasts and warnings suitable for general use of earthquake motion and volcanic phenomena caused by the generated fault motion (see, for example, Non-Patent Document 1).

  Also in the position measurement terminal, for example, NTT DoCoMo (company name) provides a service for delivering emergency bulletins to mobile terminals under the service name area mail (see Non-Patent Document 2).

JP 2002-195846 A JP 2005-020216 A “Earthquake Early Warning”, [online], Japan Meteorological Agency, Internet <http://www.seisvol.kisho.go.jp/eq/EEW/kaisetsu/index.html> [retrieval on March 31, 2008] “Emergency Bulletin“ Area Mail ””, [online], NTT DoCoMo, Inc., Internet <http://www.nttdocomo.co.jp/service/anshin/areamail/> [Search on March 31, 2008] ARIB STD-B24 “Data Broadcast Coding and Transmission Methods in Digital Broadcasting”, The Japan Radio Industry Association, October 26, 1999

  However, there are cases where assist data cannot be acquired from the network due to communication restrictions such as out of communication range or at the time of disaster.

  When assist data cannot be acquired, it is possible to perform position positioning by Standalone-GPS positioning in which information necessary for GPS positioning is directly received from a satellite and positioning calculation is performed.

  However, Standard-GPS positioning that does not use assist data may be successful if it is open sky (a place where the sky is open), but in places where there are shielding objects around the city or other places, There is a problem that it takes time, and positioning often fails.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a position positioning terminal, a position positioning method, and a position positioning system capable of positioning even when assist data cannot be acquired from a network. It is to provide.

  In order to achieve such an object, the main configuration of the position positioning terminal of the present invention includes a position positioning function by GPS, a broadcast wave receiving function, and a broadcast wave assist data recognition function for recognizing assist data included in the broadcast wave. Is provided.

  When a positioning start request is input to the positioning start signal recognizing unit, the control unit broadcasts the availability of assist data stored in the assist data holding unit, availability of assist data from wireless communication, and broadcasting including assist data. The position positioning procedure is determined according to the presence / absence of reception of the position, and position positioning is performed.

  According to one aspect of the present invention, a positioning terminal according to the present invention is received by a broadcast wave receiving unit that receives a broadcast wave including assist data used to support GPS positioning calculation, and the broadcast wave receiving unit. An assist data acquisition unit that acquires the assist data from a broadcast wave, a GPS signal reception unit that receives a GPS signal from a GPS satellite, and the GPS signal reception unit that uses the assist data acquired by the assist data acquisition unit And a GPS positioning unit that performs GPS positioning calculation based on the GPS signal received by.

  Here, the wireless communication unit further includes a wireless communication unit that performs communication through a network, the GPS positioning unit is connected to the network from the wireless communication unit, acquires the assist data from the network, and uses the acquired assist data Then, the positioning is performed, and the assist data acquiring unit acquires the assist data from the broadcast wave received by the broadcast wave receiving unit when the assist data cannot be acquired from the network.

  Here, when the assist data cannot be acquired from the network and the assist data cannot be acquired from the broadcast wave, the GPS positioning unit uses a GPS signal received by the GPS signal receiving unit to use a stand-alone-GPS positioning system. The position positioning can be executed by the above.

  Here, the GPS positioning unit is position positioning performed by acquiring assist data from the network, position positioning performed by acquiring the assist data from a broadcast wave received by the broadcast wave receiving unit, and the stand-alone-GPS. It is possible to process in parallel at least two of the positionings performed by the positioning method.

  Further, the GPS positioning unit may perform position positioning when an emergency bulletin or a position search request is received by the wireless communication unit.

  In addition, the GPS positioning unit receives broadcast wave tuning information including assist data together with an emergency bulletin or a position search request from the wireless communication unit, and the broadcast wave receiving unit broadcasts based on the received tuning information. It is possible to select a wave and obtain assist data from the selected broadcast wave.

  The wireless communication unit further includes an approximate position recognizing unit that recognizes an approximate position from information received from a network, the broadcast wave assist data recognizing unit obtains assist data from a broadcast wave, and the GPS positioning unit includes: In addition to the assist data included in the broadcast wave, position positioning can be performed using the approximate position information acquired by the approximate position recognition unit.

  Here, the approximate location may be preset broadcast wave channel list area information, base station location information acquired via a network, or emergency alert delivery destination area information.

  The broadcast wave received by the broadcast wave receiving unit further includes a broadcast wave assist data recognizing unit that determines whether or not assist data is included, and the assist data acquiring unit includes the broadcast wave assist data recognizing unit. When it is determined that assist data is included in the broadcast wave, the assist data can be acquired from the broadcast wave.

  The GPS positioning unit may perform position positioning when an emergency broadcast signal is received by the broadcast wave receiving unit.

  The broadcast wave receiving unit receives the position information of the broadcast base station and the GPS synchronization signal together with the assist data included in the broadcast wave, and the GPS positioning unit is configured to receive the assist data and the position information of the broadcast base station. The hybrid positioning calculation can be performed using the synchronization signal and the GPS signal.

  The broadcast wave includes map data, and a map data acquisition unit that acquires map data from the broadcast wave, and a map obtained by the map data acquisition unit, the result of position positioning performed by the GPS positioning unit. And a display unit that maps and displays the data.

  According to another aspect of the present invention, the positioning method in the positioning terminal according to the present invention is received in the steps of receiving a broadcast wave including assist data used for assisting the positioning, and received in the receiving step. A position based on the GPS signal received from the GPS satellite using the assist data acquired in the step of acquiring the assist data from the broadcast wave, receiving the GPS signal from the GPS satellite, and the assist data acquiring step. And a step of performing positioning.

  According to another aspect of the present invention, a position positioning system according to the present invention includes a broadcast base station that transmits a broadcast wave including assist data used for position positioning support, a GPS satellite that transmits a GPS signal, and a position In the positioning system including a positioning terminal, the positioning terminal includes an assist data acquisition unit that acquires the assist data from a broadcast wave received from the broadcast base station, and a GPS signal that receives a GPS signal from the GPS satellite. A receiving unit; and a GPS positioning unit that performs position positioning using a GPS signal transmitted from the GPS satellite using the assist data acquired by the assist data acquiring unit.

  According to another aspect of the present invention, a positioning terminal according to the present invention includes a first wireless communication unit that receives information including assist data used for position positioning support through a first network, and the first wireless communication unit. An assist data acquisition unit that acquires the assist data from information received by the wireless communication unit, a GPS signal reception unit that receives a GPS signal from a GPS satellite, and assist data acquired by the assist data acquisition unit. A GPS positioning unit that performs positioning based on the GPS signal received by the GPS signal receiving unit, and a second wireless communication unit that receives information including the assist data through a second network, the assist data The acquisition unit receives the assist data from the second wireless communication unit when the assist data cannot be acquired from the first network. Wherein obtaining the assist data from the information.

  According to another aspect of the present invention, the position positioning method in the position measuring terminal according to the present invention includes a first wireless communication step of receiving information including assist data used for position positioning support through the first network; First assist data acquisition step for acquiring the assist data from information received in the first wireless communication step, GPS signal reception step for receiving a GPS signal from a GPS satellite, and acquisition in the assist data acquisition step A GPS positioning step for performing positioning based on a GPS signal received from the GPS satellite using the assist data that has been received, and when the assist data cannot be obtained from the first network, the assist data through the second network A second wireless communication step of receiving information including And a second assist data obtaining step of obtaining the assist data from the information received by the second wireless communication section.

  According to another aspect of the present invention, a positioning system according to the present invention is a positioning system including a first network, a second network, a GPS satellite that transmits a GPS signal, and a positioning terminal. The positioning terminal includes: a first wireless communication unit that receives information including assist data used to support position positioning through the first network; and the information received by the first wireless communication unit. An assist data acquisition unit that acquires assist data, a GPS signal reception unit that receives a GPS signal from the GPS satellite, and an assist data acquired by the assist data acquisition unit, received by the GPS signal reception unit A GPS positioning unit that performs positioning based on GPS signals, and the assist data through the second network. A second wireless communication unit that receives information, and when the assist data acquisition unit cannot acquire assist data from the first network, the assist data acquisition unit receives the assist from the information received by the second wireless communication unit. Get the data.

  According to the present invention, by providing a function capable of receiving broadcast waves, a broadcast wave including assist data is selected and assist data is acquired. Therefore, even when assist data cannot be acquired from the network due to communication restrictions such as outside the communication range or at the time of a disaster, positioning can be performed.

  Moreover, when the portable terminal of the same area starts position positioning all at once, the increase of the traffic of the communication path by acquisition of assist data and the load to a GPS positioning assist data server can be reduced.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

  However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(First embodiment)
(Constitution)
Hereinafter, the configuration of the position positioning system according to the first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a position positioning system according to the first embodiment. As shown in FIG. 1, the position positioning system includes a position positioning terminal 101, a communication carrier 102, a communication base station 103, a broadcast station 104, a broadcast base station 105, and a GPS satellite 106.

  The positioning terminal 101 performs positioning by GPS. The positioning terminal 101 has a function of receiving a broadcast wave 108 broadcast from the broadcast base station 105 and a function of performing wireless communication with the communication carrier 102 through the communication base station 103.

  Broadcast station 104 is configured to transmit signals to broadcast base station 105. Broadcast base station 105 transmits the signal received from broadcast station 104 as broadcast wave 108.

  The broadcast base station 105 can broadcast the broadcast wave 108 including assist data. A broadcast wave including assist data can be configured as shown in FIG. 2, for example.

  The communication carrier 102 includes an assist data storage device (not shown) that stores assist data. When there is a request for assist data from the positioning terminal 101, the communication carrier 102 can provide the assist data 107 to the positioning terminal 101 using a wireless communication network. The assist data does not need to be held by the communication carrier 102, and may be acquired from an external storage device via the Internet.

  The GPS satellite 106 is configured to transmit a GPS signal 109. Thereby, the positioning terminal 101 can perform positioning using the GPS signal.

  Next, assist data included in the broadcast wave will be described.

  The broadcast wave can employ a transport stream (TS) as a system for multiplexing and transmitting encoded image / sound (elemental stream: ES) packetized in the MPEC-2 system standard. The TS includes PSI / SI information as information indicating a program and each elementary stream.

  In this embodiment, the receiver receives and combines the divided TS packets. As a result of the combination, the TS packet is returned to data such as video, sound, various information. Here, the various information is PSI / SI information such as NIT (Network Information Table), PAT (Program Association Table), and PMT (Program Map Table) shown in FIG.

  The receiver identifies and reproduces video and sound to be reproduced and assist data from these PSI / SI information.

  FIG. 2 shows an example of PSI / SI information included in a broadcast wave.

  The PSI / SI information includes an A layer and a B layer.

  The A layer includes NIT, PAT, and PMT. The NIT transmits information associating transmission path information such as frequency and broadcast service, and describes all service IDs (service_id) included in one distribution system.

  The PAT stores a list of programs included in a specific TS. The PMT stores PIDs such as images and sounds included in the program.

  In the example illustrated in FIG. 2, the assist data ID (ES_ID) and the PID are defined in the BMT PMT. The assist data may use transmission by a DSM-CC data carousel.

  Note that the assist data may be transmitted using the free space of the PCR.

  FIG. 3 shows an example of a PCR packet for inserting assist data. As shown in the figure, the broadcast wave is composed of a plurality of TS packets. Each TS packet includes a 4-byte header, a variable-length adaptation field, and a payload.

  PID and various flags are defined in the packet header.

  The adaptation field contains reference time information (PCR) necessary for synchronous reproduction of video / audio and dummy data (stuffing data) for making the TS packet have a fixed length of 188 bytes. Assist data may be included in the stuffing data and transmitted.

  FIG. 4 shows the timing of transmission control data according to this embodiment. In the present embodiment, as shown in FIG. 4, “Assist Data Sending Flag” is set in TMCC (Transmission and Multiplexing Configuration and Control) information, which is transmission control data included in the broadcast wave, and “Assist Data Existence Descriptor” is set in PMT. Set. Then, by referring to the values of the “assist data transmission flag” and “assist data presence / absence descriptor”, it is possible to determine whether or not the broadcast includes assist data.

  Details of such transmission control are described in Non-Patent Document 3, for example.

(Configuration of positioning terminal)
Hereinafter, the configuration of the positioning terminal according to the present embodiment will be described with reference to the drawings.

  5 and 6 are a block diagram and an external view of the positioning terminal 101 according to the present embodiment.

  As shown in FIG. 5, the positioning terminal 101 includes a wireless communication unit 201, a positioning start input unit 202, a positioning start signal recognition unit 203, an assist data holding unit 204, a broadcast wave receiving unit 205, and a broadcast wave. An assist data recognition unit 212, a control unit 206, a GPS signal reception unit 208, a GPS position positioning unit 209, a display unit 210, and a map data holding unit 207 are included.

  The wireless communication unit 201 can acquire assist data information from the outside by wireless communication.

  Specifically, the positioning start input unit 202 can be configured as a position positioning start button 211 shown in FIG. When the user presses the position positioning start button, a position positioning start signal is sent to the positioning start signal recognition unit 203, and the position positioning terminal 101 starts position positioning.

  The assist data holding unit 204 holds assist data 107 acquired from the outside by wireless communication or assist data included in the broadcast wave 108 and is used when starting position measurement.

  The broadcast wave receiving unit 205 receives the broadcast wave 108. The broadcast wave assist data recognition unit 212 determines whether assist data is included in the broadcast wave 108. When it is determined that the broadcast wave 108 includes assist data, the control unit 206 stores the assist data acquired from the broadcast wave 108 in the assist data holding unit 204.

  The GPS signal receiving unit 208 receives the GPS signal 109 transmitted from the GPS satellite 106.

  The GPS positioning unit 209 is activated by an instruction from the control unit 206 that has received the position positioning start signal, and is based on GPS information acquired by the GPS signal receiving unit 208 or the GPS information and assist data acquired from the control unit 206. Position.

  The display unit 210 uses the position measurement result obtained by the GPS position measurement unit 209 and the map information stored in the map data holding unit 207 to display a map showing the current position as shown in FIG. Display.

  The control unit 206 starts operation when the positioning start signal recognizing unit 203 determines that a positioning start signal has been input. The position positioning procedure is determined according to the availability of assist data stored in the assist data holding unit 204, the availability of assist data from wireless communication, and the presence / absence of assist data of the broadcast wave 108. decide. Thereafter, the GPS positioning unit 209 is instructed to start positioning. When the assist data stored in the assist data holding unit 204 is available, the assist data is provided to the GPS position measurement unit 209.

(Operation of positioning terminal)
Hereinafter, the operation of the positioning terminal 101 according to the present embodiment will be described with reference to the drawings.

  FIG. 7 is a flowchart showing the operation of the positioning terminal 101 according to the first embodiment.

  When the user operates the positioning start input unit 202, a position positioning start signal is input to the positioning start signal recognition unit 203. The positioning start signal recognition unit 203 starts position positioning (step S301).

Here, the position positioning start signal may be input by the following method.
(1) The positioning terminal 101 may execute an application program that instructs the start of positioning. In this case, a mechanism may be adopted in which a position positioning start signal is transmitted to the positioning start signal recognizing unit 203 in accordance with a condition according to a setting value held by the application program. For example, the value of the time interval may be held as the set value, and the position positioning start signal may be transmitted at regular intervals.
(2) Position positioning may be started by wireless communication from the outside. In this case, the positioning may be started upon receiving a positioning request based on a search from a third party terminal or an emergency bulletin (area mail) distributed from the Japan Meteorological Agency.
(3) When an emergency broadcast signal is included in a broadcast wave, position positioning may be started upon reception of the broadcast wave.
(4) Further, a position positioning signal may be provided in the broadcast wave, and the position positioning may be started upon reception of the position positioning signal.

  Further, as shown in FIG. 9, when positioning information is inserted into the data broadcast of the broadcast program and the user selects the information, the positioning may be started. In the example shown in the figure, the display unit 210 includes a video display unit 802 that displays video included in the broadcast wave, and a data broadcast display unit 804 that displays information such as characters included in the broadcast wave. The data broadcast display unit 804 prompts the start of position positioning by displaying a selectable character string (“Would you like to go to a shelter?”) By pressing a predetermined button provided on the position positioning terminal 101. be able to.

  When the positioning start signal recognition unit 203 receives the position positioning start signal, the control unit 206 accesses the assist data holding unit 204 and determines whether or not the assist data stored in the assist data holding unit 204 can be used. (Step S302).

  When it is determined that the data can be used, the control unit 206 acquires assist data stored in the assist data holding unit 204 and transmits the assist data to the GPS position measurement unit 209. The GPS positioning unit 209 performs positioning by the Assisted-GPS method using the received assist data (step S307).

  If the positioning is successful in step S307, the map data stored in the map data holding unit 207 is acquired and the positioning result is mapped to display a map of the current position on the display unit 210 as shown in FIG. Step S312).

  If it is determined in step S302 that the assist data stored in the assist data holding unit 204 is unusable, or if the position positioning calculation fails in step S307, the wireless communication unit 201 accesses the network and stores the assist data. A request is made (step S303).

  When assist data is acquired from the network, as described above, the GPS positioning unit 209 starts position positioning by the Assisted-GPS positioning method (step S305). If the position measurement is successful, a map of the current position is displayed on the display unit 210 (step S312).

  If positioning fails in step S305, the fact is displayed on the display unit 210 (step S306).

  In step S304, when the positioning terminal 101 is out of communication range, cannot access the network due to communication restrictions, communication traffic increases and the network cannot be accessed for a long time, or assist data cannot be acquired from the network due to a reason that the assist data server is down. Activates the broadcast wave receiving unit 205.

  The broadcast wave receiving unit 205 receives a broadcast wave. The broadcast wave assist data recognition unit 212 determines whether assist data is included in the broadcast wave (step S308). If the broadcast wave assist data recognition unit 212 determines that the broadcast wave includes assist data, the assist data is acquired (step S309).

  The broadcast wave tuning method including the assist data may be performed using the tuning information received by the position positioning terminal 101. In this case, for example, a broadcast wave tuning information including assist data is included in an e-mail (see Non-Patent Document 2) based on an external position measurement request by a third party search or an emergency bulletin distributed from the Japan Meteorological Agency. It may be transmitted to the positioning terminal 101.

  Further, in the example shown in FIG. 9, assist data can be obtained by inserting broadcast wave channel selection information and PID information including assist data together with information for prompting the start of positioning in the data broadcast display section of the broadcast program. It is possible to obtain. In this case, when the user selects the channel selection information or the like, the positioning terminal 101 can select a corresponding broadcast station.

  When assist data is acquired from a broadcast wave, as described above, the GPS positioning unit 209 starts position positioning by the Assisted-GPS positioning method (step S310). If the position measurement is successful, a map of the current position is displayed on the display unit 210 (step S312).

  If the broadcast wave assist data recognition unit 212 determines in step S308 that no assist data is included in the broadcast wave, position measurement is performed by the stand-alone-GPS positioning method (step S311). If the positioning is successful, a map of the current position is displayed on the display unit 210 (step S312). If the positioning has failed, a message indicating that the positioning has failed is displayed on the display unit 306 (step S306).

  FIG. 8 shows a sequence diagram of the positioning procedure.

  As shown in the figure, the positioning terminal 101 uses (1) steps S302, S307, (2) steps S303, S304, S305, (3) steps S308, S309, S310, and (4) step S311 as position positioning methods. Any combination of these processes or all processes may be executed in parallel.

  In addition, the position information that is the positioning result obtained by the GPS positioning unit 209 or information indicating that the positioning has failed is transmitted to the network via the wireless communication unit 201, and the information thus transmitted is transmitted. May be configured to be used by a third party.

  Moreover, it transmits to the management server of a disaster message board, and the positional information on the positioning terminal 101 may be posted, and a third party can operate the management server and confirm the positional information on the positioning terminal 101. In this case, if the network is down, the positioning result may be transmitted to the network after the network is restored.

  In step S312, the map information held by the map data holding unit 207 may be stored in advance, and the map information around the position information is acquired from an external server storing the map information via the network. Also good. In the latter case, the position information obtained by the GPS position measurement unit 209 may be transmitted to an external server to request map information, and the server may perform map information around the position information in response to the request. Good.

  Moreover, you may acquire the map information of the said area from a broadcast wave by broadcasting including the map information of the said area in a broadcast wave.

  In addition, the map information includes area information such as an evacuation shelter and nearby shops, and the area information is displayed on the positioning terminal 101 to guide to the evacuation shelter and shop closest to the current position. It becomes possible. Here, the area information may be a mark on the map or may be character information.

  Furthermore, as shown in FIG. 9, map information can be acquired by inserting channel selection information and PID information including map information together with information for prompting the start of position measurement in the data broadcast of the broadcast program. Become.

(Second Embodiment)
The assist data includes approximate position information. When the assist data is transmitted from the communication base station, the approximate position information is the position information of the communication base station that transmitted the assist data. The position positioning terminal can perform position positioning by using the received position information of the communication base station as the approximate position information of the terminal.

  When the assist data is transmitted from the broadcast base station, the approximate position information becomes the position information of the broadcast base station. However, since the reception range of the broadcast wave emitted from the broadcast base station 105 is wide, the position accuracy of the approximate position information included in the broadcast wave is low. In particular, when assist data is included in satellite digital broadcasting, satellite position information cannot be used as an approximate position.

  In the second embodiment of the present invention, a method capable of providing a more accurate approximate position even when assist data is included in a broadcast wave covering a wide range will be described.

(Configuration of positioning terminal)
Hereinafter, the configuration of the positioning terminal 101 according to the present embodiment will be described with reference to the drawings.

  FIG. 10 shows a block diagram of the positioning terminal 101 according to the present embodiment.

  The position positioning terminal 101 includes an approximate position recognition unit 211 in addition to the position positioning terminal according to the first embodiment.

  The approximate position recognition unit 211 receives the approximate position 111 from the network via the wireless communication unit 201.

  The approximate position 111 can be base station position information. The base station location information is included in the positioning request from another person's mobile terminal, the positioning request from a third party terminal, or the emergency bulletin (area mail) delivered by the Japan Meteorological Agency, which triggers the start of positioning. You may transmit from a station.

  Further, the emergency alert delivered from the Japan Meteorological Agency includes the delivery destination area as shown in FIG. Therefore, the distribution destination area information may be used as the approximate position information.

  In addition, the positioning terminal 101 according to the present embodiment includes a channel list information storage unit 214 that stores channel list information for receiving broadcast waves, and the setting of the area where the user is located is set in the channel list. It can be carried out. Therefore, the area information set in the channel list may be used as the approximate position.

  The operation of this embodiment can be described with reference to FIG. In step S308 of FIG. 7, the broadcast wave receiving unit 108 acquires the data from the network as described above without using the approximate position included in the assist data even when the assist data is included in the broadcast wave. Position measurement is started by using the approximate position 111.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

(Configuration of positioning terminal)
FIG. 12 is a block diagram of the positioning terminal 101 according to the third embodiment.

  The positioning terminal 101 according to the third embodiment has a configuration in which the wireless communication unit is removed from the positioning terminal according to the first embodiment.

  Thereby, it is possible to realize position positioning by the Assisted-GPS positioning method using assist data even in a terminal that does not have a wireless communication function.

(Operation of positioning terminal)
The operation of this embodiment can be realized by proceeding to step S308 without proceeding to step S303 from step S302 or step S307 shown in FIG. Specifically, if it is determined in step S302 that the assist data stored in the assist data holding unit 204 is not usable, or if position positioning fails in step S307, the broadcast wave assist data recognition unit 212 It is determined whether or not assist data is included in the broadcast wave (step S308). The subsequent processing is the same as in the first embodiment.

  In addition, as a position positioning method of the sequence of the positioning terminal 101 according to the first embodiment shown in FIG. 8, (1) Steps S302 and S307, (3) Steps S308, S309, S310, and (4) Step S311 processing Any combination or all of the processes may be performed in parallel.

(Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings.

(Constitution)
FIG. 13 is a diagram showing a configuration of the position positioning system according to the present embodiment.

  As shown in the figure, the positioning system includes a GPS signal receiver 112 in the broadcast base station 105 in addition to the configuration of the positioning system according to the first embodiment.

  The GPS signal receiving device 112 receives assist data and a GPS synchronization signal from the GPS satellite 106.

  The broadcast base station 105 includes a synchronization signal and position information of the broadcast base station 105 in addition to the assist data and transmits the broadcast wave 108.

(Configuration of positioning terminal)
The positioning terminal 101 includes a receiving unit that recognizes the synchronization signal and the position information of the broadcast base station 105 in addition to the positioning terminal according to the first embodiment.

  The GPS position measurement unit 209 performs hybrid position measurement using the GPS signal 109 from the GPS satellite 106, the synchronization signal received from the broadcast base station 109, and the position information of the broadcast base station 105.

(Fifth embodiment)
In the above-described embodiment, the digital wave is taken as an example of the broadcast wave. However, the present invention can also be applied to a case where an AM / FM radio broadcast wave is received.

  For example, when the broadcast wave receiving unit is configured as an AM / FM radio receiving unit and the assist data cannot be acquired from the network by the wireless communication unit of the position measurement terminal, the assist data may be acquired by tuning.

(Sixth embodiment)
Next, a sixth embodiment of the present invention in which a second wireless communication unit is provided instead of the broadcast wave receiving unit will be described.

  Since the configuration and operation of the present embodiment are similar to those of the above-described embodiment, different points will be described and redundant description will be omitted.

  FIG. 14 is a block diagram illustrating an example of a positioning terminal provided with two wireless communication units capable of communicating with different networks. 5 is almost the same as that shown in FIG. 5, but includes a mobile network communication unit 1401 instead of the wireless communication unit 201, and a wireless LAN communication unit instead of the broadcast wave receiving unit 205. 1405, and a wireless LAN assist data recognition unit 1412 is provided instead of the broadcast wave assist data recognition unit 212.

  A mobile network communication unit 1401 exchanges an assist data acquisition request 110, assist data 107, and the like with the mobile network.

  The wireless LAN communication unit 1405 can receive wireless LAN data 1408 from the wireless LAN.

  For example, the positioning terminal 101 acquires assist data 107 through a mobile network in normal operation. Next, a GPS signal is received from a GPS satellite, and position measurement based on the GPS signal is performed using the acquired assist data.

  If the assist data cannot be acquired from the mobile network, the positioning terminal 101 activates the wireless LAN communication unit 1405 and searches for a connectable wireless LAN. Next, wireless LAN data 1408 including assist data is received through the connected wireless LAN.

  The wireless LAN assist data recognition unit 1412 determines whether the wireless LAN data 1408 includes assist data. When it is determined that the wireless LAN data 1408 includes assist data, the control unit 206 acquires assist data from the wireless LAN data received by the wireless LAN communication unit 1405.

  Various modifications other than those described above are possible. However, as long as it is based on the technical idea described in the claims, the modifications are within the technical scope of the present invention.

It is a figure showing composition of a position positioning system concerning a 1st embodiment of the present invention. It is a figure which shows the structure of the PSI / SI information of a broadcast wave. It is a figure which shows the example of a PCR packet. It is a figure which shows the timing of the transmission control data which concern on 1st Embodiment of this invention. It is a block diagram of the positioning terminal which concerns on 1st Embodiment of this invention. It is an external view of the positioning terminal which concerns on 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the positioning terminal which concerns on 1st Embodiment of this invention. It is a sequence diagram of the position positioning procedure which concerns on 1st Embodiment of this invention. It is an external view of the positioning terminal which concerns on 1st Embodiment of this invention. It is a block diagram of the positioning terminal which concerns on 2nd Embodiment of this invention. It is a figure which shows the emergency alert utilized in 2nd Embodiment of this invention. It is a block diagram of the positioning terminal which concerns on 3rd Embodiment of this invention. It is a figure which shows the structure of the position positioning system which concerns on 4th Embodiment of this invention. It is a block diagram of the positioning terminal which concerns on 6th Embodiment of this invention.

Explanation of symbols

101 Positioning Terminal 102 Communication Carrier 103 Communication Base Station 104 Broadcast Station 105 Broadcast Base Station 106 GPS Satellite 107 Assist Data 108 Broadcast Wave 109 GPS Signal

Claims (17)

A broadcast wave receiving unit for receiving a broadcast wave including assist data used for assistance in positioning;
An assist data acquisition unit that acquires the assist data from a broadcast wave received by the broadcast wave reception unit;
A GPS signal receiver for receiving GPS signals from GPS satellites;
A position positioning terminal comprising: a GPS positioning unit that performs position positioning based on the GPS signal received by the GPS signal receiving unit using the assist data acquired by the assist data acquiring unit. The wireless communication unit further performs communication through the network,
The GPS positioning unit is connected to the network from the wireless communication unit, acquires the assist data from the network, performs position positioning using the acquired assist data,
The position positioning terminal according to claim 1, wherein the assist data acquiring unit acquires assist data from the broadcast wave received by the broadcast wave receiving unit when the assist data cannot be acquired from the network.   When the assist data cannot be obtained from the network and the assist data cannot be obtained from the broadcast wave, the GPS positioning unit uses the GPS signal received by the GPS signal receiving unit to perform position measurement by the stand-one-GPS positioning method. The position positioning terminal according to claim 2, wherein:   The GPS positioning unit is based on position positioning performed by obtaining assist data from the network, position positioning performed by obtaining the assist data from a broadcast wave received by the broadcast wave receiving unit, and the stand-alone-GPS positioning method. The position positioning terminal according to claim 3, wherein at least two of the position positioning performed are processed in parallel.   5. The position positioning terminal according to claim 2, wherein the GPS positioning unit performs position positioning when an emergency bulletin or a position search request is received by the wireless communication unit.   The GPS positioning unit receives broadcast wave tuning information including assist data together with an emergency bulletin or a location search request from the wireless communication unit, and the broadcast wave receiving unit receives a broadcast wave based on the received tuning information. The position positioning terminal according to any one of claims 2 to 5, wherein a position is selected and assist data is acquired from the selected broadcast wave. An approximate position recognition unit for recognizing an approximate position from information received from a network by the wireless communication unit;
The broadcast wave assist data recognition unit obtains assist data from a broadcast wave,
7. The GPS positioning unit performs position positioning using the approximate position information acquired by the approximate position recognition unit in addition to assist data included in the broadcast wave. Location positioning terminal described in Crab.   8. The approximate position is pre-set broadcast wave channel list area information, base station position information acquired via a network, or emergency alert distribution destination area information. The described positioning device. A broadcast wave assist data recognition unit for determining whether assist data is included in the broadcast wave received by the broadcast wave receiving unit;
The assist data acquisition unit acquires assist data from the broadcast wave when the broadcast wave assist data recognition unit determines that the broadcast wave includes assist data. The position positioning terminal according to any one of 8.   The position positioning terminal according to any one of claims 1 to 9, wherein the GPS positioning unit performs position positioning when an emergency broadcast signal is received by the broadcast wave receiving unit.   The broadcast wave receiving unit receives the position information of the broadcast base station and the GPS synchronization signal together with the assist data included in the broadcast wave, and the GPS positioning unit is configured to receive the assist data, the position information of the broadcast base station, The position positioning terminal according to any one of claims 1 to 10, wherein a hybrid positioning calculation is performed using a synchronization signal and the GPS signal. The broadcast wave includes map data,
A map data acquisition unit for acquiring map data from the broadcast wave;
12. The display device according to claim 1, further comprising: a display unit configured to map and display a result of the position measurement performed by the GPS positioning unit on the map data acquired by the map data acquisition unit. Location positioning terminal described in Crab. Receiving a broadcast wave including assist data used to assist in positioning;
Obtaining the assist data from the broadcast wave received in the receiving step;
Receiving a GPS signal from a GPS satellite;
A position positioning method in a position positioning terminal, comprising the step of positioning based on a GPS signal received from the GPS satellite using the assist data acquired in the assist data acquiring step. In a position positioning system including a broadcast base station that transmits a broadcast wave including assist data used for position positioning support, a GPS satellite that transmits a GPS signal, and a position positioning terminal, the position positioning terminal includes:
An assist data acquisition unit for acquiring the assist data from a broadcast wave received from the broadcast base station;
A GPS signal receiver for receiving GPS signals from the GPS satellites;
A position positioning system comprising: a GPS positioning section that performs position positioning using a GPS signal transmitted from the GPS satellite using the assist data acquired by the assist data acquiring section. A first wireless communication unit that receives information including assist data used for position positioning support through the first network;
An assist data acquisition unit that acquires the assist data from the information received by the first wireless communication unit;
A GPS signal receiver for receiving GPS signals from GPS satellites;
A GPS positioning unit that performs position positioning based on the GPS signal received by the GPS signal receiving unit using the assist data acquired by the assist data acquiring unit;
A second wireless communication unit that receives information including the assist data through a second network,
The position positioning terminal, wherein the assist data acquisition unit acquires the assist data from information received by the second wireless communication unit when the assist data cannot be acquired from the first network. A first wireless communication step of receiving information including assist data used for location support through a first network;
A first assist data obtaining step for obtaining the assist data from the information received in the first wireless communication step;
A GPS signal receiving step for receiving a GPS signal from a GPS satellite;
Using the assist data acquired in the assist data acquisition step, a GPS positioning step for performing positioning based on the GPS signal received from the GPS satellite;
A second wireless communication step of receiving information including the assist data through a second network when the assist data cannot be obtained from the first network;
And a second assist data acquisition step of acquiring the assist data from the information received by the second wireless communication unit. In a positioning system including a first network, a second network, a GPS satellite that transmits a GPS signal, and a positioning terminal, the positioning terminal includes:
A first wireless communication unit that receives information including assist data used for location support through the first network;
An assist data acquisition unit that acquires the assist data from the information received by the first wireless communication unit;
A GPS signal receiver for receiving GPS signals from the GPS satellites;
A GPS positioning unit that performs position positioning based on the GPS signal received by the GPS signal receiving unit using the assist data acquired by the assist data acquiring unit;
A second wireless communication unit that receives information including the assist data through the second network;
When the assist data acquisition unit cannot acquire assist data from the first network, the assist data acquisition unit acquires the assist data from information received by the second wireless communication unit.

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