JP2013036882A - Portable terminal, location measurement method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal, a location measurement method, and a program which can properly measure a location of the portable terminal according to a surrounding communication environment even where an electric wave transmitted from a GPS satellite cannot reach.SOLUTION: A communication unit 101 transmits a location related information acquisition request for acquiring location related information including location information of a neighboring device 20 and a response time period which is a preparation time period for transmitting the location information, to the neighboring device 20 via two or more communication devices (CDMA) 1011 having different communication standards, and also receives the location related information from the neighboring device. A time measurement unit 1092 measures a response waiting time period from when the location related information acquisition request is transmitted until the location related information is received. A distance measurement unit 1093 measures a distance from a location indicated by the location information of the neighboring device to its own location on the basis of the response waiting time period and the response time period. A self location measurement unit 1094 measures its own location on the basis of the measured distance and the location indicated by the received location information of the neighboring device.

Description

  The present invention relates to a portable terminal, a position measurement method, and a program.

  In recent years, an increasing number of mobile terminals can receive and use position information indicating their position by receiving radio waves transmitted from a GPS (Global Positioning System) satellite or the like. However, since the radio wave transmitted from the GPS satellite does not reach in the underground or the like, the mobile terminal cannot use the location information of its own location.

  On the other hand, a position determination method has been proposed in which position information indicating the position is acquired from a peripheral device whose position is known by wireless communication and the position of a mobile terminal whose position is not known is estimated (for example, patent document) 1 and 2). According to these position determination methods, if there is a peripheral device whose position is known in the vicinity, it is possible to estimate its own position even in the basement or the like, and the mobile terminal can use the estimated position information of its own position. it can.

Special table 2003-506930 gazette JP-T-2004-516463

  However, there are various standards for wireless communication, and communication between devices having different communication standards is not possible. Peripheral devices located around the mobile terminal may have different communication standards. In that case, the communication environments of the peripheral devices are different. Therefore, the mobile terminal cannot cope with various communication environments by the methods disclosed in Patent Documents 1 and 2, and the communication environment of a peripheral device that is an information source for measuring the surroundings, that is, its own position. Depending on the situation, there is a problem that the own position may not be measured appropriately.

  The present invention has been made in view of the above circumstances, and a portable terminal capable of appropriately measuring its own position according to the surrounding communication environment even in a place where radio waves transmitted from GPS satellites do not reach An object of the present invention is to provide a position measuring method and program.

In order to achieve the above object, a mobile terminal according to the first aspect of the present invention provides:
A control unit that has a time measurement unit, a distance measurement unit, and a self-position measurement unit, and performs overall control;
A communication unit configured by two or more communication devices having different communication standards and performing transmission / reception of information to / from the outside via each communication device under the control of the control unit;
With
The communication unit includes a peripheral device position information indicating a position of the peripheral device and a response period that is a preparation time for the peripheral device to transmit the peripheral device position information to a peripheral device that is a peripheral device. A position related information acquisition request for acquiring position related information is transmitted via the communication devices, and the position related information is received from the peripheral devices via the communication devices.
The time measuring unit measures a response waiting period, which is a period from when the position related information acquisition request is transmitted by the communication unit to when the position related information is received by the communication unit,
The distance measuring unit measures the distance from the position indicated by the peripheral device position information to the own position based on the response waiting period and the response period included in the position related information received by the communication unit, As a distance measurement,
The self-position measuring unit determines a self-position based on the distance measurement value obtained corresponding to each of the three or more pieces of position-related information received by the communication unit and the position indicated by the peripheral device position information. taking measurement,
It is characterized by that.

In order to achieve the above object, a position measuring method according to a second aspect of the present invention includes:
Peripheral device position information indicating the position of the peripheral device and peripheral-related information including a response period, which is a preparation time for the peripheral device to transmit the peripheral device position information, is acquired from a peripheral device that is a peripheral device. A communication step of transmitting a position-related information acquisition request to the effect via two or more communication devices having different communication standards and receiving the position-related information from the peripheral device via each communication device;
A time measuring step of measuring a response waiting period indicating a period from when the position related information acquisition request is transmitted to when the position related information is received;
Based on the response waiting period and the response period included in the received position-related information, a distance measurement step of measuring a distance from the position indicated by the peripheral device position information to its own position, and acquiring it as a distance measurement value;
A self-position measuring step of measuring the self-position based on the distance measurement value obtained corresponding to each of the three or more received position-related information and the position indicated by the peripheral device position information;
It is characterized by providing.

In order to achieve the above object, a program according to the third aspect of the present invention provides:
On the computer,
Peripheral device position information indicating the position of the peripheral device and peripheral-related information including a response period, which is a preparation time for the peripheral device to transmit the peripheral device position information, is acquired from a peripheral device that is a peripheral device. A communication procedure for transmitting a position-related information acquisition request to the effect via two or more communication devices having different communication standards and receiving the position-related information from the peripheral device via the communication devices;
A time measurement procedure for measuring a response waiting period indicating a period from when the position related information acquisition request is transmitted to when the position related information is received;
Based on the response waiting period and the response period included in the received position-related information, a distance measurement procedure for measuring a distance from the position indicated by the peripheral device position information to its own position, and acquiring it as a distance measurement value;
A self-position measurement procedure for measuring the self-position based on the distance measurement value obtained corresponding to each of the three or more received position-related information and the position indicated by the peripheral device position information;
Is executed.

  According to the present invention, even in a place where radio waves transmitted from GPS satellites do not reach, it is possible to appropriately measure the own position according to the surrounding communication environment.

It is a block diagram which shows the structure of the position measurement system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the mobile telephone shown in FIG. It is a figure which shows the structure of the peripheral device file shown in FIG. It is a block diagram which shows the structure of the peripheral device shown in FIG. It is a flowchart of the position measurement process which the control part of the mobile telephone shown in FIG. 2 performs. It is a figure which shows the structure of the position relevant information which the communication part shown in FIG. 4 transmits. 6 is a diagram for explaining an example of a method for measuring a distance between a mobile phone and a peripheral device according to Embodiment 1. FIG. 2 is a block diagram illustrating a minimum configuration of a mobile terminal according to Embodiment 1. FIG. It is a block diagram which shows the structure of the mobile telephone which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of communication standard DB (database) shown in FIG. It is a figure for demonstrating an example of the method of calculating the self-position which concerns on Embodiment 2. FIG.

(Embodiment 1)
Hereinafter, a position measurement system 100 according to Embodiment 1 of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the position measurement system 100 according to the first embodiment includes a mobile phone 10, a plurality of peripheral devices 20 (20 _{1 to} 20 _n ), and a plurality of GPS satellites 30 (30 ₁ to 30 _m ). I have. The mobile phone 10 has a function of calculating (measuring) its own position based on a radio wave received from the GPS satellite 30 or a radio wave received from the peripheral device 20 in addition to a general call function.

  As shown in FIG. 2, the mobile phone 10 includes a communication unit 101, a GPS receiver 102, an operation unit 103, a display unit 104, a codec unit 105, a speaker 106, a microphone (microphone) 107, and a storage. Unit 108 and a control unit 109.

  The communication unit 101 includes two or more communication devices having different communication standards. In the first embodiment, in order to facilitate understanding, the communication unit 101 includes a communication device (CDMA) 1011 adapted to a CDMA (Code Division Multiple Access) communication standard, and a communication device adapted to a Bluetooth (registered trademark) communication standard. (Bluetooth (registered trademark)) 1012, a communication device (wireless LAN) 1013 adapted to a wireless LAN (Local Area Network) communication standard (IEEE802.11a, etc.), communication adapted to a wireless USB (Universal Serial Bus) communication standard A device (wireless USB) 1014 and a communication device (WiMAX) 1015 adapted to a communication standard of WiMAX (Worldwide Interoperability for Microwave Access) are provided.

  A communication device (CDMA) 1011 performs wireless communication with another mobile phone 10 via a nearby base station. The communication device (CDMA) 1011 receives and demodulates an audio signal transmitted from another mobile phone 10, and then supplies the demodulated audio signal to the speaker 106 via the codec unit 105 to output audio. The communication device (CDMA) 1011 modulates the audio signal supplied from the microphone 107 via the codec unit 105, and then transmits the modulated audio signal to another mobile phone 10 via a nearby base station.

  The communication device (Bluetooth (registered trademark)) 1012 performs wireless communication with the peripheral device 20 that conforms to the communication standard of Bluetooth (registered trademark) under the control of the control unit 109.

  The communication device (wireless LAN) 1013 performs wireless communication with the peripheral device 20 adapted to the wireless LAN communication standard under the control of the control unit 109.

  The communication device (wireless USB) 1014 performs wireless communication with the peripheral device 20 adapted to the wireless USB communication standard under the control of the control unit 109.

  The communication device (WiMAX) 1015 performs wireless communication with the peripheral device 20 adapted to the WiMAX communication standard under the control of the control unit 109.

  In response to the request from the control unit 109, the GPS receiver 102 calculates its own position based on the radio wave received from the GPS satellite 30, and supplies its own position information indicating the calculated own position to the control unit 109.

  The operation unit 103 includes a dial button and the like, and supplies an operation signal corresponding to a user operation to the control unit 109.

  The display unit 104 includes an LCD (Liquid Crystal Display) or the like, and displays images such as a standby screen and various messages under the control of the control unit 109.

  The codec unit 105 includes a codec, a DAC (Digital to Analog Converter), an ADC (Analog to Digital Converter), an amplifier, and the like. The codec unit 105 decodes a digital audio signal supplied from the communication device (CDMA) 1011 and converts it into an analog signal. After conversion, the converted analog signal is amplified and supplied to the speaker 106 to output sound. The codec unit 105 converts the analog audio signal supplied from the microphone 107 into a digital audio signal, encodes it, and then supplies the encoded digital signal to the communication device (CDMA) 1011.

  The speaker 106 is driven by an analog audio signal supplied from the codec unit 105 and emits sound. The speaker 106 includes earphones, headphones, and the like.

  The microphone 107 generates an analog audio signal based on surrounding sounds such as a voice uttered by the user, and supplies the generated audio signal to the codec unit 105.

  The storage unit 108 includes a ROM (Read Only Memory) 1081, a RAM (Random Access Memory) 1082, and the like. The ROM 1081 stores a program executed by the control unit 109. On the other hand, the RAM 1082 temporarily stores programs executed by the control unit 109, data, and the like as work areas. As shown in FIG. 3, the control unit 109 determines the distance between the peripheral device 20 acquired from the peripheral device 20 and the peripheral device 20 calculated (measured) by a predetermined method and the own position (distance measurement value). Are created at a predetermined timing and stored in the RAM 1082. Details will be described later.

  The control unit 109 is configured by a CPU (Central Processing Unit) and the like, and the CPU executes a predetermined program stored in the ROM 1081, thereby controlling each unit shown in FIG. It has a function of calculating its own position based on radio waves received from the satellite 30 or radio waves received from the peripheral device 20. The control unit 109 includes a timer 1091 and includes a time measurement unit 1092, a distance measurement unit 1093, and a self-position measurement unit 1094 as functional components for calculating the self-location. Details of functions and control of the control unit 109 including the time measurement unit 1092, the distance measurement unit 1093, and the self-position measurement unit 1094 will be described later.

  The peripheral device 20 shown in FIG. 1 is a device that exists in the vicinity of the mobile phone 10, and responds to a request from the mobile phone 10, position information indicating the position (peripheral device position information), and a response period described later. The position-related information including is transmitted wirelessly. The peripheral device 20 includes a PC (Personal Computer), a PDA (Personal Digital Assistant), a printer, a copier, an access point, and the like.

  As illustrated in FIG. 4, the peripheral device 20 includes a communication unit 201, an operation unit 202, a display unit 203, a storage unit 204, and a control unit 205.

  The communication unit 201 includes a communication device adapted to an arbitrary communication standard, and wirelessly communicates with the mobile phone 10. In the first embodiment, in order to facilitate understanding, the communication unit 201 is configured by a communication device adapted to any one of the communication standards among Bluetooth (registered trademark), wireless LAN, wireless USB, and WiMAX. To do.

  The operation unit 202 includes operation buttons and the like, and supplies an operation signal corresponding to a user operation to the control unit 205.

  The display unit 203 includes an LCD (Liquid Crystal Display) or the like, and displays various images under the control of the control unit 205.

  The storage unit 204 includes a memory such as a ROM and a RAM (not shown). The ROM stores a program executed by the control unit 205, and the RAM includes a memory as a work area of the control unit 205. The storage unit 204 includes a position information storage unit 2041 that stores peripheral device position information indicating the position of the peripheral device 20. In the present embodiment, the peripheral device position information includes the latitude, longitude, and altitude (for example, above sea level) at the position where the peripheral device 20 exists.

  The control unit 205 includes a CPU and the like, and executes a predetermined program stored in the storage unit 204, thereby responding to a request from the mobile phone 10 and including peripheral device position information and a response period described later. The related information is transmitted wirelessly via the communication unit 201. In addition, the control unit 205 includes a timer 2051.

  The GPS satellite 30 shown in FIG. 1 transmits radio waves including time information indicating time and orbit information indicating the orbit of the GPS satellite 30.

  Next, the operation of the position measurement system 100 having the above configuration will be described focusing on the operation of the mobile phone 10.

  The mobile phone 10 has a function of calculating (measuring) its own position based on a radio wave received from the GPS satellite 30 or a radio wave received from the peripheral device 20 in addition to a general call function. Hereinafter, the operation of the mobile phone 10 will be described by taking as an example the case where the mobile phone 10 calculates its own position in response to an instruction from the user.

  When the user wants to measure the position of the mobile phone 10, he / she operates the operation unit 103 and gives an instruction to that effect. In response to the position measurement instruction from the user, the control unit 109 starts the position measurement process shown in FIG. 5, and first requests a request to acquire the own position information indicating the own position (own position information acquisition request). It transmits to the GPS receiver 102 (step S11).

  The GPS receiver 102 responds to its own location information acquisition request to determine whether or not radio waves can be received from three or more GPS satellites 30, that is, based on the radio waves received from the GPS satellites 30. It is determined whether the position can be calculated. When it is determined that the GPS receiver 102 can calculate the position of the mobile phone 10 based on the radio wave received from the GPS satellite 30, the time information and the orbit information included in the radio wave received from the GPS satellite 30 are used. Based on the principle of triangulation, the own position is calculated, and own position information indicating the calculated own position is transmitted to the control unit 109. On the other hand, if the GPS receiver 102 determines that it cannot calculate its own position based on the radio wave received from the GPS satellite 30, it controls a message indicating that its own position cannot be acquired (acquisition impossible message). To the unit 109.

  The control unit 109 receives the own position information or the acquisition impossible message from the GPS receiver 102 (step S12). The control unit 109 determines whether or not the own position information is received from the GPS receiver 102 (step S13). If the own position information is received from the GPS receiver 102 (step S13; Yes), the control unit 109 displays the own position on the display unit 104 (step S17). When the own position information is not received from the GPS receiver 102 (step S13; No), the control unit 109 requests to acquire position related information including the peripheral device position information of the peripheral device 20 and a response period described later ( The position related information acquisition request) is wirelessly transmitted to the peripheral device 20 existing around the mobile phone 10 via the communication unit 101 (step S14).

  The control unit 109 determines whether or not position related information has been received from three or more peripheral devices 20 (step S15). When it is determined that position-related information has not been received from three or more peripheral devices 20 (step S15; No), the control unit 109 displays a message indicating that its own position cannot be measured (position measurement impossible message). The information is displayed on the unit 104 (step S18), and the position measurement process is terminated.

  On the other hand, if it is determined that position-related information has been received from three or more peripheral devices 20 (step S15; Yes), the own position is calculated based on the position-related information received from the peripheral device 20 and a response waiting period described later. (Step S16). The control unit 109 displays the calculated own position on the display unit 104 (step S17), and ends the position measurement process.

  Specifically, in step S14, the control unit 109 transmits a transmission instruction signal indicating that a position-related information acquisition request is transmitted, to the communication device (Bluetooth (registered trademark)) 1012, the communication device (wireless LAN) 1013, and the communication device. (Wireless USB) 1014 and communication device (WiMAX) 1015.

  In response to the transmission instruction signal, the communication device (Bluetooth (registered trademark)) 1012, the communication device (wireless LAN) 1013, the communication device (wireless USB) 1014, and the communication device (WiMAX) 1015 issue a position related information acquisition request. Transmit wirelessly according to each communication standard.

  The control unit 205 of the peripheral device 20 that has received the position-related information acquisition request, in response to the position-related information acquisition request, stores the peripheral device in the position information storage unit 2041 as shown in FIG. Communicating position related information including a response period indicating a period from receiving position information and a position related information acquisition request to transmitting peripheral device position information, that is, a preparation time (preparation period) for transmitting peripheral device position information The data is transmitted to the mobile phone 10 via the unit 201. Note that the control unit 205 measures the response period using the timer 2051.

The communication device (Bluetooth (registered trademark)) 1012, the communication device (wireless LAN) 1013, the communication device (wireless USB) 1014, and the communication device (WiMAX) 1015 transmit a position-related information acquisition request for a predetermined period T. _{When the} position related information is received from the peripheral device 20 in the _out , the received position related information is supplied to the control unit 109. Note that the predetermined period _Tout corresponds to a period from the start of the process to the stop (timeout), and if no position-related information of 3 or more is received within this period, the process related to the own position measurement is stopped. To do.

  The time measuring unit 1092 of the control unit 109 measures a response waiting period, which is a time from when the position related information acquisition request is transmitted to when the position related information is received. Specifically, the time measuring unit 1092 starts measuring the elapsed time from when the position-related information acquisition request is transmitted by the timer 1091. The time measurement unit 1092 receives a response from the measurement value of the timer 1091 at that time each time it receives position related information from the peripheral device 20 via the communication device (Bluetooth (registered trademark)) 1012 to the communication device (WiMAX) 1015. Measure the waiting period. The time measuring unit 1092 measures a response waiting period for each of at least three pieces of position related information received by the communication unit 101. The distance measuring unit 1093 of the control unit 109 indicates the peripheral device position information included in each position related information based on the response period included in three or more position related information and the response waiting period corresponding to each position related information. The distance from the position to the own position of the mobile phone 10 is calculated and acquired as a distance measurement value.

  For example, as illustrated in FIG. 7, the mobile phone 10 transmits a position related information acquisition request to the peripheral device 20, and the peripheral device 20 includes the peripheral device position information and a response period in response to the position related information acquisition request. It is assumed that the position related information is transmitted to the mobile phone 10. In this case, the distance measuring unit 1093 of the control unit 109 calculates the distance between the mobile phone 10 and the peripheral device 20 based on the response waiting period and the response period included in the received position related information, To do. The calculation method is based on, for example, a relational expression of distance = light speed × (response waiting period−response period) / 2. In FIG. 7, a line having a downward arrow at the position of the mobile phone 10 and the peripheral device 20 indicates the passage of time, and the interval between the mobile phone 10 and the peripheral device 20 indicates the distance between the two. .

  The control unit 109 creates the peripheral device file 1082a as a new file in the RAM 1082, and associates the peripheral device position information included in the position related information with the distance measurement value for each of the position related information received from the peripheral device 20. It is stored in the peripheral device file 1082a.

  The own position measurement unit 1094 of the control unit 109 calculates the own position based on the peripheral device position information and the distance measurement value stored in the peripheral device file 1082a. Specifically, the own position measurement unit 1094 has the position indicated by the peripheral device position information of each of the three or more peripheral devices 20 as the center, and sets the distance measurement value as the radius for each of the three or more peripheral devices 20. A self-position is calculated by generating a sphere and obtaining the intersection of three or more spheres obtained. When there is an error in the distance measurement value, three or more spheres do not intersect at one point. If they do not intersect at one point, the own position measuring unit 1094 obtains, for example, the center of gravity of the area surrounded by the surface of each sphere, and sets the position of this center of gravity as its own position. In this way, the control unit 109 calculates its own position based on the position related information received from the three or more peripheral devices 20 and the response waiting period.

  Although the mobile phone 10 has been described as an example, the mobile phone 10 may be a mobile terminal. FIG. 8 shows a minimum configuration of the mobile terminal according to the first embodiment. The minimum configuration is a configuration necessary for achieving only the functions essential to the present invention. As shown in FIG. 8, the mobile terminal according to the first embodiment includes two or more communication standards different from the control unit 109 including the time measurement unit 1092, the distance measurement unit 1093, and the self-position measurement unit 1094 as essential components. And a communication unit 101 configured to communicate with the outside under the control of the control unit 109. In FIG. 8, for example, the communication unit 101 communicates with a communication device (Bluetooth (registered trademark)) 1012 adapted to the communication standard of Bluetooth (registered trademark) 1012 and communication adapted to the communication standard of the wireless LAN. It is assumed that a device (wireless LAN) 1013 is provided.

  The communication unit 101 transmits the above-described position related information acquisition request via the communication device (Bluetooth (registered trademark)) 1092 and the communication device (wireless LAN) 1093.

  Peripheral device 20 from which radio waves used for transmission / reception of information between peripheral device 20 present in the periphery of this mobile terminal and this mobile terminal can be obtained at the intensity required for reception in both the mobile terminal and peripheral device 20 For example, there are four devices, two of which have communication devices (Bluetooth (registered trademark)) adapted to the Bluetooth (registered trademark) communication standard, and the other two devices are communication devices (Bluetooth (registered trademark)) adapted to the communication standard of wireless LAN (registered trademark). Wireless LAN). At this time, the four peripheral devices 20 can receive the position-related information acquisition request transmitted from the portable terminal by the respective communication devices, and can transmit the position-related information to the portable terminal. The mobile terminal can receive position-related information transmitted from these peripheral devices via the communication device (Bluetooth (registered trademark)) 1012 and the communication device (wireless LAN) 1013 equipped.

  In this case, the number of location-related information received by the mobile terminal is 4, and as described above, the mobile terminal measures its own position via the time measuring unit 1092, the distance measuring unit 1093, and the local position measuring unit 1094. it can.

  In order to measure the own position by the principle of triangulation, the position related information must be 3 or more. If the mobile terminal has only a communication device applied to the communication standard of either Bluetooth (registered trademark) or wireless LAN as the communication unit 101, the number of position related information that can be received is two, It becomes impossible to measure. Providing two or more communication devices with different communication standards increases the probability of acquiring three or more pieces of position-related information, and increases the possibility of measuring the own position accordingly.

  As described above, the mobile phone 10 receives position-related information from three or more peripheral devices 20 via two or more communication devices (Bluetooth (registered trademark)) 1012 to communication devices (WiMAX) 1015 having different communication standards. It receives and calculates its own location based on the received location related information and response waiting period. For this reason, even if it is a place where the radio wave transmitted from the GPS satellite does not reach, the own position is appropriately measured according to the communication environment of the peripheral device 20 that is the surrounding, that is, the information source for measuring the own position. be able to.

  Further, when the mobile phone 10 can receive radio waves from three or more GPS satellites 30, the mobile phone 10 calculates its own position based on the radio waves received from the GPS satellites 30 and receives radio waves from the three or more GPS satellites 30. However, if position-related information can be received from three or more peripheral devices 20, the user's own position is calculated based on the position-related information received from the peripheral device 20 and the response waiting period. For this reason, according to the reception state of the radio wave transmitted from the GPS satellite 30, the own position can be appropriately measured.

(Embodiment 2)
In the first embodiment, the mobile phone 10 calculates its own position based on the position related information received from the peripheral device 20 and the response waiting period. In the second embodiment, the mobile phone 10 calculates its own location based on the location-related information received from the peripheral device 20, the response waiting period, and the communication standard of the communication device that has received the peripheral device location information. The configuration of the mobile phone 10A in this case is shown in FIG. The same parts as those in FIG. 2 are denoted by the same reference numerals.

  The mobile phone 10A according to the second embodiment includes a communication standard DB 1082b in the RAM 1082 in addition to the elements constituting the mobile phone 10 according to the first embodiment. As shown in FIG. 10, the communication standard DB 1082b includes a communication standard and measurement error information indicating an error when measuring a distance between communication devices based on radio waves transmitted and received by a communication device adapted to the communication standard. It is stored in association. In the example shown in FIG. 10, the measurement error information is shown as a ratio (a to d%) with respect to the reach distance of the radio wave transmitted by the communication device to which a predetermined communication standard is applied. The predetermined communication standard is a communication standard applied to a communication device that has received position-related information used to calculate a distance measurement value. A radio wave reach distance refers to the peripheral device 20 that has transmitted the position-related information. This means the distance to the mobile phone 10A, and a distance measurement value is used instead.

  In the second embodiment, the distance measurement unit 1093 reads measurement error information associated with a predetermined communication standard from the communication standard DB 1082b illustrated in FIG. The predetermined communication standard is a communication standard applied to a communication device that has received position-related information used for calculating a distance measurement value. The distance measurement unit 1093 calculates a distance measurement error by multiplying the distance measurement value by the value of the measurement error information. The own position measurement unit 1094 calculates the own position using this distance measurement error.

  For example, the measurement error information a to d% shown in FIG. 10 is 10%, respectively, and the arrival of radio waves transmitted by a communication device that conforms to the Bluetooth (registered trademark), wireless LAN, wireless USB, and WiMAX communication standards. If the distances, that is, the distance measurement values are 100 m, 30 m, 10 m, and 48 km, respectively, 10 m, 3 m, 1 m, and 4800 m correspond to the Bluetooth (registered trademark), wireless LAN, wireless USB, and WiMAX communication standards, respectively. This is a distance measurement error.

Hereinafter, in order to facilitate understanding, the peripheral device 20 ₁ having a communication device adapted to the Bluetooth (registered trademark) communication standard at a position where the position-related information acquisition request transmitted by the mobile phone 10A can be received. a case where the peripheral device 20 ₃ provided with peripheral device 20 2 having a communication device adapted to wireless LAN communication _standard, and adapted to wireless communication standards of a USB communication device is present as an example, the mobile phone 10 near A description will be given centering on the process of calculating its own position based on the position related information received from the devices 20 _{1 to} 20 ₃ (step 16 of the position measurement process shown in FIG. 5). Note that the receivable position is a position where the radio wave intensity necessary for reception can be obtained.

Control unit 109, when it is determined Yes at position measurement processing step S15 of FIG. 5, the distance measuring unit 1093, a response waiting period time measurement unit 1092 is measured by the timer 1091, it received from the peripheral device 20 ₁ based on the response period included in the position-related information, calculates a distance L1 "100m" with the current position and the peripheral device 20 _1. Then, the distance measuring unit 1093, the communication standard DB1082b, corresponding to the communication device peripheral device 20 ₁ receives the location-related information transmitted (Bluetooth (registered trademark)) 1012 communication standard "Bluetooth (registered trademark)" The value a% of the measurement error information, 10% in this example, is read out and multiplied by the distance L1 to obtain the distance measurement error “10 m”.

The distance measuring unit 1093 of the control unit 109, a response waiting period measured by the time measurement unit 1092 is a timer 1091, based on the response period included in the position-related information received from the peripheral device 20 _2, the peripheral device 20 ₂ is calculated as a distance L2 “30 m”. Then, the distance measuring unit 1093, the communication standard DB1082b, the value b of the measurement error information corresponding to the communication device peripheral device 20 ₂ receives the location-related information transmitted (wireless LAN) 1013 communication standard "wireless LAN" in %, 10% in this example, and the distance measurement error “3 m” is obtained by multiplying the distance L2.

Then, the distance measuring section 1093 of the control unit 109, a response waiting period time measurement unit 1092 is measured by the timer 1091, based on the response period included in the position-related information received from the peripheral device 20 _3, a peripheral device It calculates the distance L3 "10m" with 20 ₃ and the current position. The distance measuring unit 1093, the communication standard DB1082b, peripheral device 20 _third communication apparatus receiving the location-related information transmitted (wireless USB) 1014 communication standard "wireless USB" to the value c% of measurement error information corresponding to In this example, 10% is read out and multiplied by the distance L3 to obtain the distance measurement error “1 m”.

FIG. 11 is a diagram for explaining an example of a method for calculating the own position according to the second embodiment, and the sphere is replaced with a circle for easy viewing. Current position measuring unit 1094 of the controller 109, and the distance from the surface of the sphere C1 of radius L1 centered at the position of the peripheral device 20 ₁ (circumference of FIG. 11, circles C1) is within 10m region, near a region a distance from the surface (circumference in FIG. 11 yen C2) spheres C2 of radius L2 centered at the position of the device 20 ₂ is within 3m, a radius L3 centered at the position of the peripheral device 20 ₃ The own position is calculated based on the overlapping portion with the region whose distance from the surface of the sphere C3 (the circumference of the circle C3 in FIG. 11) is within 1 m. A region whose distance from the surface of a sphere having a radius L (circumference in FIG. 11) is within D is a surface of a concentric sphere having a radius L + D (circumference in FIG. 11) and a concentric sphere having a radius L−D. The area surrounded by the surface (circumference in FIG. 11). The overlapping portion in the case where there are more than three pieces of position-related information used for self-location calculation is obtained in the same manner. In the second embodiment, the own position measuring unit 1094 calculates the own position, for example, by calculating the center of gravity of the overlapping portion.

  As described above, the mobile phone 10 </ b> A automatically detects the position-related information received from the peripheral device 20, the response waiting period, and the measurement error information corresponding to the communication standard of the communication device that has received the peripheral device position information. Calculate the position. For this reason, even if it is a place where the radio wave transmitted from the GPS satellite does not reach, the own position is appropriately measured according to the communication environment of the peripheral device 20 that is the surrounding, that is, the information source for measuring the own position. be able to. Further, the mobile phone 10A can appropriately measure its own position by reflecting the distance measurement error acquired based on the measurement error information corresponding to the communication standard.

  The present invention is not limited to the first and second embodiments, and various modifications and applications are possible. For example, the configuration and operation of the hardware shown in the above description are examples, and the present invention is not limited to these, and can be changed and applied as appropriate.

  In the first and second embodiments, the mobile phones 10 and 10A as the mobile terminals have been described as examples. However, the mobile terminals are not limited thereto, and examples thereof include smartphones, game machines, PDAs (Personal Digital Assistants), and tablet PCs. (Personal Computer) or a notebook PC.

  In the first and second embodiments, the mobile phone 10, 10 </ b> A and the peripheral device 20 are wirelessly connected via a communication device adapted to any one communication standard among Bluetooth (registered trademark), wireless LAN, wireless USB, and WiMAX. Although communication is performed, the communication standard is not limited to these. The peripheral device 20 may include a mobile terminal such as a mobile phone. As the range of the peripheral device 20 capable of communication is expanded, the possibility that the mobile phones 10 and 10A can measure their positions increases.

  In the first and second embodiments, the case where the control unit 109 executes the position measurement process in response to an operation instruction from the user has been described as an example in order to facilitate understanding. Other processes (services) may call and execute the position measurement process described above. Thereby, the application range of the invention which concerns on Embodiment 1 and 2 expands.

  In the first and second embodiments, the peripheral device 20 stores the peripheral device position information indicating the position in the position information storage unit 2041 in advance, but is not limited thereto, and the peripheral device 20 further includes a GPS receiver. Peripheral device position information may be sequentially generated based on radio waves received from the GPS satellite 30, and the generated peripheral device position information may be stored in the position information storage unit 2041. Thereby, the error of the peripheral device position information when the peripheral device 20 is a portable terminal is reduced, and as a result, the measurement error of the own position is reduced.

  In the second embodiment, the value of the measurement error information set corresponding to the communication standard is a ratio or a percentage. However, the value is not limited to this, and any numerical value set corresponding to the communication standard may be used. It can be anything.

In the second embodiment, in order to facilitate understanding, the mobile phone 10A includes a peripheral device 20 ₁ including a communication device adapted to the Bluetooth (registered trademark) communication standard, and a communication device adapted to the wireless LAN communication standard. peripheral device 20 _2, and has been described as an example the case of receiving the location-related information from each of the peripheral device 20 ₃ having a communication device adapted to wirelessly USB communication standard, location-related from 4 or more peripheral devices 20 If the information can be received, the own position may be calculated by selecting at least three of the received position-related information from the optimum, for example, the one having the smallest distance measurement error. In this case, the own position measurement unit 1094, for example, among the position related information received from the peripheral device 20, at least three position related information in ascending order of the distance measurement error corresponding to the communication standard of the communication device that has received the position related information. The distance acquired based on the communication standard applied to each communication device that selected the information, the selected location related information, the response waiting period corresponding to each of the selected location related information, and the selected location related information The own position is calculated based on the measurement error. Thereby, the measurement error of the own position is reduced.

  In the second embodiment, in order to facilitate understanding, the communication unit 201 of the peripheral device 20 includes a communication device adapted to any one of the communication standards among Bluetooth (registered trademark), wireless LAN, wireless USB, and WiMAX. However, the present invention is not limited to this, and two or more communication devices having different communication standards may be provided. In this case, the storage unit 204 includes, for example, the communication standard DB 1082b, and the control unit 205 corresponds to the communication device that has received the position related information acquisition request among the position related information acquisition requests received from the mobile phone 10A. The position related information is transmitted via the communication device having the smallest value of the measurement error information corresponding to the communication standard applied to the communication device. Thereby, the distance measurement error obtained based on the position related information received from the peripheral device 20 is reduced, and as a result, the measurement error of the own position is reduced.

  In the first and second embodiments, the peripheral device position information includes the latitude, longitude, and altitude (for example, above sea level) at the position where the peripheral device 20 exists. However, the present invention is not limited to this, and coordinate values in an arbitrary coordinate system. May be included. In this case, the control unit 109 may include a conversion unit. The conversion unit converts the coordinate value included in the peripheral device position information received from the peripheral device 20 into a coordinate value in a predetermined coordinate system. At this time, the control unit 109 may align the number of significant digits of the coordinate value to a predetermined value. Thereby, the information of the own position in the desired coordinate system can be obtained.

  In the first and second embodiments, first, the GPS receiver 102 calculates the own position based on the radio wave received from the GPS satellite 30 in response to the own position information acquisition request. However, the present invention is not limited to this. Instead of the GPS receiver 102, for example, the control unit 109 may calculate its own position based on radio waves received from the base station via the communication device (CDMA) 1011.

  In the second embodiment, as shown in FIG. 11, the self-position is calculated by calculating the center of gravity of a portion where predetermined areas overlap, but the present invention is not limited to this. Any method may be used as long as the own position is calculated based on the overlapping portion.

  Further, the storage unit 108 may be provided with map data, and the control unit 109 may display a map indicating the position of the overlapping portion on the display unit 104. As a result, it is possible to display the own position in a more easily recognizable form.

  Note that the mobile phones 10 and 10A described in the first and second embodiments are not limited to mobile phones, and may be mobile terminals. The portable terminal does not need to use a dedicated device, can be realized by a normal computer, and the portable terminal may be regarded as a computer. In that case, the configuration of the mobile phone shown in FIGS. 2 and 9 represents the configuration of the computer. For example, a program and data for causing the computer to execute the above-described processes are stored in a recording medium (CD-ROM or the like). The portable terminal according to the first or second embodiment can be realized by recording, distributing, installing the program, and executing the program on an operating system (OS) of the computer. Further, the distribution of the program and data is not limited to the CD-ROM or the like, and may be performed via a communication line or the like.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A control unit that has a time measurement unit, a distance measurement unit, and a self-position measurement unit, and performs overall control;
A communication unit configured by two or more communication devices having different communication standards and performing transmission / reception of information to / from the outside via each communication device under the control of the control unit;
With
The communication unit includes a peripheral device position information indicating a position of the peripheral device and a response period that is a preparation time for the peripheral device to transmit the peripheral device position information to a peripheral device that is a peripheral device. A position related information acquisition request for acquiring position related information is transmitted via the communication devices, and the position related information is received from the peripheral devices via the communication devices.
The time measuring unit measures a response waiting period, which is a period from when the position related information acquisition request is transmitted by the communication unit to when the position related information is received by the communication unit,
The distance measuring unit measures the distance from the position indicated by the peripheral device position information to the own position based on the response waiting period and the response period included in the position related information received by the communication unit, As a distance measurement,
The self-position measuring unit determines a self-position based on the distance measurement value obtained corresponding to each of the three or more pieces of position-related information received by the communication unit and the position indicated by the peripheral device position information. taking measurement,
A portable terminal characterized by that.

(Appendix 2)
A storage unit that associates and stores the communication standard and the measurement error information of the distance;
The distance measuring unit further includes:
The measurement error information associated with the communication standard applied to the communication device that has received the position related information used when acquiring the distance measurement value is acquired from the storage unit,
Based on the measurement error information, obtain a distance measurement error that is an error of the distance measurement value,
The self-position measuring unit is
Measuring the own position based on the distance measurement value, the distance measurement error, and the position indicated by the peripheral device position information obtained corresponding to each of the received three or more position related information;
The mobile terminal according to appendix 1, characterized in that.

(Appendix 3)
The self-position measuring unit is
For each of the three or more received position related information, the position indicated by the peripheral device position information included in the position related information is the center, and the distance measurement value measured corresponding to the position related information is the radius. Obtain a region where the distance from the surface of the sphere is within the distance measurement error, and measure the position based on the portion where the regions overlap,
The mobile terminal according to Supplementary Note 2, wherein

(Appendix 4)
The measurement error information is a value indicating a ratio,
The distance measurement error is calculated based on the distance measurement value and the measurement error information.
4. The mobile terminal according to appendix 2 or 3, wherein

(Appendix 5)
When the peripheral device position information includes a coordinate value of the peripheral device in an arbitrary coordinate system, the information processing apparatus further includes a conversion unit that converts the coordinate value into a coordinate value in a predetermined coordinate system.
The mobile terminal according to any one of appendices 1 to 4, characterized in that:

(Appendix 6)
When the receiving unit receives 4 or more of the position related information via the communication device,
The self-position measuring unit is
From the received position related information, select the position related information of 3 or more in order from the smallest distance measurement error,
Measuring the own position based on the distance measurement value, the distance measurement error, and the position indicated by the peripheral device position information for each of the selected three or more position-related information;
The mobile terminal according to any one of appendices 2 to 5, characterized in that:

(Appendix 7)
Peripheral device position information indicating the position of the peripheral device and peripheral-related information including a response period, which is a preparation time for the peripheral device to transmit the peripheral device position information, is acquired from a peripheral device that is a peripheral device. A communication step of transmitting a position-related information acquisition request to the effect via two or more communication devices having different communication standards and receiving the position-related information from the peripheral device via each communication device;
A time measuring step of measuring a response waiting period indicating a period from when the position related information acquisition request is transmitted to when the position related information is received;
Based on the response waiting period and the response period included in the received position-related information, a distance measurement step of measuring a distance from the position indicated by the peripheral device position information to its own position, and acquiring it as a distance measurement value;
A self-position measuring step of measuring the self-position based on the distance measurement value obtained corresponding to each of the three or more received position-related information and the position indicated by the peripheral device position information;
A position measuring method comprising:

(Appendix 8)
On the computer,
Peripheral device position information indicating the position of the peripheral device and peripheral-related information including a response period, which is a preparation time for the peripheral device to transmit the peripheral device position information, is acquired from a peripheral device that is a peripheral device. A communication procedure for transmitting a position-related information acquisition request to the effect via two or more communication devices having different communication standards and receiving the position-related information from the peripheral device via the communication devices;
A time measurement procedure for measuring a response waiting period indicating a period from when the position related information acquisition request is transmitted to when the position related information is received;
Based on the response waiting period and the response period included in the received position-related information, a distance measurement procedure for measuring a distance from the position indicated by the peripheral device position information to its own position, and acquiring it as a distance measurement value;
A self-position measurement procedure for measuring the self-position based on the distance measurement value obtained corresponding to each of the three or more received position-related information and the position indicated by the peripheral device position information;
A program characterized by having executed.

DESCRIPTION OF SYMBOLS 10, 10A Cellular phone 20 Peripheral device 30 GPS satellite 100 Position measurement system 101 Communication part 102 GPS receiver 103 Operation part 104 Display part 105 Codec part 106 Speaker 107 Microphone 108 Storage part 109 Control part 201 Communication part 202 Operation part 203 Display part 204 Storage Unit 205 Control Unit 1011 Communication Device (CDMA)
1012 Communication device (Bluetooth (registered trademark))
1013 Communication device (wireless LAN)
1014 Communication device (wireless USB)
1015 Communication device (WiMAX)
1081 ROM
1082 RAM
1082a Peripheral device file 1082b Communication standard DB
1091 Timer 1092 Time measurement unit 1093 Distance measurement unit 1094 Self-position measurement unit 2041 Position related information storage unit 2051 Timer

Claims (8)

A control unit that has a time measurement unit, a distance measurement unit, and a self-position measurement unit, and performs overall control;
A communication unit configured by two or more communication devices having different communication standards and performing transmission / reception of information to / from the outside via each communication device under the control of the control unit;
With
The communication unit includes a peripheral device position information indicating a position of the peripheral device and a response period that is a preparation time for the peripheral device to transmit the peripheral device position information to a peripheral device that is a peripheral device. A position related information acquisition request for acquiring position related information is transmitted via the communication devices, and the position related information is received from the peripheral devices via the communication devices.
The time measuring unit measures a response waiting period, which is a period from when the position related information acquisition request is transmitted by the communication unit to when the position related information is received by the communication unit,
The distance measuring unit measures the distance from the position indicated by the peripheral device position information to the own position based on the response waiting period and the response period included in the position related information received by the communication unit, As a distance measurement,
The self-position measuring unit determines a self-position based on the distance measurement value obtained corresponding to each of the three or more pieces of position-related information received by the communication unit and the position indicated by the peripheral device position information. taking measurement,
A portable terminal characterized by that. A storage unit that associates and stores the communication standard and the measurement error information of the distance;
The distance measuring unit further includes:
The measurement error information associated with the communication standard applied to the communication device that has received the position related information used when acquiring the distance measurement value is acquired from the storage unit,
Based on the measurement error information, obtain a distance measurement error that is an error of the distance measurement value,
The self-position measuring unit is
Measuring the own position based on the distance measurement value, the distance measurement error, and the position indicated by the peripheral device position information obtained corresponding to each of the received three or more position related information;
The mobile terminal according to claim 1. The self-position measuring unit is
For each of the three or more received position related information, the position indicated by the peripheral device position information included in the position related information is the center, and the distance measurement value measured corresponding to the position related information is the radius. Obtain a region where the distance from the surface of the sphere is within the distance measurement error, and measure the position based on the portion where the regions overlap,
The mobile terminal according to claim 2. The measurement error information is a value indicating a ratio,
The distance measurement error is calculated based on the distance measurement value and the measurement error information.
The portable terminal according to claim 2 or 3, wherein When the peripheral device position information includes a coordinate value of the peripheral device in an arbitrary coordinate system, the information processing apparatus further includes a conversion unit that converts the coordinate value into a coordinate value in a predetermined coordinate system.
The mobile terminal according to claim 1, wherein the mobile terminal is a mobile terminal. When the receiving unit receives 4 or more of the position related information via the communication device,
The self-position measuring unit is
From the received position related information, select the position related information of 3 or more in order from the smallest distance measurement error,
Measuring the own position based on the distance measurement value, the distance measurement error, and the position indicated by the peripheral device position information for each of the selected three or more position-related information;
The mobile terminal according to claim 2, wherein the mobile terminal is a mobile terminal. Peripheral device position information indicating the position of the peripheral device and peripheral-related information including a response period, which is a preparation time for the peripheral device to transmit the peripheral device position information, is acquired from a peripheral device that is a peripheral device. A communication step of transmitting a position-related information acquisition request to the effect via two or more communication devices having different communication standards and receiving the position-related information from the peripheral device via each communication device;
A time measuring step of measuring a response waiting period indicating a period from when the position related information acquisition request is transmitted to when the position related information is received;
Based on the response waiting period and the response period included in the received position-related information, a distance measurement step of measuring a distance from the position indicated by the peripheral device position information to its own position, and acquiring it as a distance measurement value;
A self-position measuring step of measuring the self-position based on the distance measurement value obtained corresponding to each of the three or more received position-related information and the position indicated by the peripheral device position information;
A position measuring method comprising: On the computer,
Peripheral device position information indicating the position of the peripheral device and peripheral-related information including a response period, which is a preparation time for the peripheral device to transmit the peripheral device position information, is acquired from a peripheral device that is a peripheral device. A communication procedure for transmitting a position-related information acquisition request to the effect via two or more communication devices having different communication standards and receiving the position-related information from the peripheral device via the communication devices;
A time measurement procedure for measuring a response waiting period indicating a period from when the position related information acquisition request is transmitted to when the position related information is received;
Based on the response waiting period and the response period included in the received position-related information, a distance measurement procedure for measuring a distance from the position indicated by the peripheral device position information to its own position, and acquiring it as a distance measurement value;
A self-position measurement procedure for measuring the self-position based on the distance measurement value obtained corresponding to each of the three or more received position-related information and the position indicated by the peripheral device position information;
A program characterized by having executed.

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