JP2010008355A - Network system and position detection method of wireless terminal in network system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network system detecting a position of a wireless terminal from the measuring data obtained from transmitted data of the wireless terminal by a plurality of wireless base stations, possessing a filtering function of position information utilizing the transmitted data, and reducing the processing load of the network system, the traffic at the network, and the processing load of an internet terminal. <P>SOLUTION: In the network system comprising a wireless terminal, wireless base stations, a positioning information management server and an user terminal, a plurality of wireless base stations receive answer signal indicating receipt of the transmitted data the wireless terminal transmits to user terminal or the received data from user terminal, and, while transmitting the transmitted data or answer signal to the user terminal, extract the measured data for detecting range or azimuth to a self station from wireless terminal from the transmitted data or answer signal, and the positioning information management server detects the position of wireless terminal from the measured data from a plurality of wireless base stations to output as position information. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a positioning information providing system and a positioning information providing method for easily and accurately detecting the position of each wireless terminal using a wireless communication system.

Conventionally, in a mobile wireless communication network using wireless terminals represented by PHS (Personal Handy-phone System), cellular phone, and wireless LAN (Local Area Network), the position of each wireless terminal is detected, and the wireless terminal Location information services to be notified are widely performed (see, for example, Non-Patent Document 1, Non-Patent Document 2, and Non-Patent Document 3).
In the mobile radio communication networks described in the above non-patent documents, information received from GPS (Global Positioning System) satellites, IDs (IDentification) of peripheral radio base stations, radio link signal levels, and transmission of radio frames The wireless terminal acquires information such as RTT (Round Trip Time) from reception to reception as measurement data.

The wireless terminal transmits the acquired measurement data to the wireless base station. When receiving the measurement data, the radio base station transmits the received measurement data to the positioning server.
Then, the positioning server converts the measurement data into position information, and transmits the converted position information to the application server or the wireless terminal.
In addition, when the wireless terminal cannot acquire positioning data, cell-based positioning may be performed in which the position of the wireless base station is directly used as position information using the ID of the wireless base station to which the wireless terminal is connected as measurement data.

The wireless terminal acquires measurement data when the wireless terminal is triggered based on the operation of the wireless terminal or a predetermined schedule, and when triggered by the network based on an instruction from a network-side terminal or server There is a case.
"Location Information Service", NTT DoCoMo Technical Journal, Vol.9, No.2 “Expansion of FOMA location information function”, NTT DoCoMo Technical Journal, Vol.14, No.1 Junichi Fumimoto, Jun Shionozaki, Takahiko Sueyoshi, Takashi Ami Yagi, “PlaceEngine: WiFi Location Information Infrastructure Based on Real World Collective Intelligence”, Internet Conference 2006

In the conventional location information service, in a network system, a wireless terminal or a single wireless base station to which the wireless terminal is connected acquires measurement data, and the measured data is transmitted via a wireless base station using a dedicated wireless message. It is premised on transmitting to the positioning server.
Therefore, in the conventional network method, since it is not assumed that the measurement data is acquired by a plurality of radio base stations in the vicinity of the radio terminal, a plurality of measurement data acquired separately by each radio base station Correspondence and aggregation of measurement data cannot be performed.

In addition, when the radio base station receives data or a data response, and simultaneously acquires the parameters used in the communication as measurement data, the data or the data response and the location information are processed separately and independently. Yes.
For this reason, in the conventional network method, even if the response signal of the transmission data or reception data transmitted by the wireless terminal and the position information of the detected wireless terminal can be acquired at the same time, It cannot be used in association.
Further, in the conventional network system, when a response signal of transmission data or reception data is received at a radio base station, a location information providing service using the measurement data is performed in order to simultaneously acquire measurement data of the radio terminal. In this case, unless some filtering function is provided, the processing load on the network device, the transfer amount in the network, and the processing load on the Internet terminal increase.

  The present invention has been made in view of such circumstances, and a plurality of wireless base stations each collects and uses measurement data acquired from transmission data transmitted by the wireless terminal to obtain position information of the wireless terminal, Corresponds to transmission data and location information, and has a filtering function of location information using this measurement data, reducing the processing load of the network system, the transfer amount in the network and the processing load of the Internet terminal compared to the conventional example It is an object of the present invention to provide a network system and a method for measuring a position of a wireless terminal in the network system.

  The network system of the present invention is a network system including a radio terminal, a radio base station, a positioning information management server, and a user terminal, and a plurality of radio base stations transmit data transmitted from the radio terminal to the user terminal. A response signal indicating that the received data from the user terminal has been received, control information transmitted by the wireless terminal to the wireless base station, or a response signal indicating that reception control information from the wireless base station has been received. Receiving and transmitting the transmission data, control information or response signal to the user terminal, and extracting measurement data necessary for detecting a distance or direction from the wireless terminal to itself from the transmission data or response signal; The positioning information management server is configured to receive the wireless terminal from measurement data input from a plurality of the wireless base stations. And outputs position as position information by detecting.

  In the network system of the present invention, the radio base station adds measurement identification time or synchronization identification information indicating measurement time to the extracted measurement data, and transmits the measurement data to the positioning information management server. However, the measurement time or the synchronization signal indicating the measurement time is used to combine the measurement data input from each of the radio base stations to obtain the position of the radio terminal.

  The network system of the present invention further includes an Internet gateway for transferring the transmission data and response signal from the wireless terminal to the user terminal, and the transmission data and the location information are converted to the terminal identification number and the measurement time. Or it is combined with the synchronous signal which shows measurement time, It transmits to the said user terminal, It is characterized by the above-mentioned.

  The network system according to the present invention further includes an Internet gateway for transferring the transmission data and response signal from the wireless terminal to the user terminal, and the response signal and the location information are converted to the terminal identification number and the measurement time. Or it is combined with the synchronous signal which shows measurement time, It transmits to the said user terminal, It is characterized by the above-mentioned.

  In the network system of the present invention, when the positioning information management server accumulates position information for each wireless terminal in the internal storage unit and receives a position information request signal from the user terminal, the position information request signal is transmitted from the internal storage unit to the position information request signal. Position information of a wireless terminal corresponding to the included terminal identification information is transmitted to the user terminal.

  The network system according to the present invention is characterized in that the position information calculated by the positioning information management server is randomly deleted.

  The network system according to the present invention is characterized in that the radio base station deletes the measurement data according to the type of transmission data and response signal transmitted from the radio terminal.

  The network system of the present invention has a table indicating whether or not the wireless base station performs position information calculation for each wireless terminal, and extracts measurement data of the wireless terminal that does not perform position information detection. It is characterized by not.

  The position detection method of a wireless terminal in the network system of the present invention is a position detection method of a wireless terminal composed of a wireless terminal, a wireless base station, a positioning information management server, and a user terminal, and a plurality of the wireless base stations The wireless terminal receives a transmission signal transmitted to the user terminal or a response signal indicating that the reception data from the user terminal has been received, forwards the transmission data or the response signal to the user terminal, and from the wireless terminal The process of extracting the measurement data necessary for detecting the distance or direction to itself from the transmission data or the response signal, and the positioning information management server from the measurement data input from the plurality of radio base stations And detecting the position of the terminal and outputting it as position information.

As described above, according to the present invention, normal transmission / reception data between a wireless terminal and another user terminal, that is, a wireless terminal, is not transmitted / received a special signal for position measurement in a plurality of wireless base stations. A network system that simultaneously acquires measurement data used to detect a position from transmission data and a response signal transmitted from the mobile station and detects the position of a wireless terminal from the plurality of measurement data is realized.
That is, according to the present invention, when the measurement data is acquired at each radio base station around the radio terminal, the positioning information management server is assigned to each radio base station separately by adding the measurement time or identification information for synchronization. It is possible to associate and aggregate a plurality of acquired measurement data, and to detect the position of the wireless terminal using these measurement data.

In addition, according to the present invention, when transmission data (or a response signal of received data) is received by a radio base station and at the same time the parameters used in the communication are acquired as measurement data, transmission data (or response of received data) By adding the same identifier (for example, measurement time or synchronization identification information) to the location information, and further adding information for performing path control so as to reach the same Internet gateway, the response of the transmission data (or reception data) Signal) and position information are associated with each other in the Internet gateway, and these data can be transmitted as a set to the user terminal.
Furthermore, according to the present invention, measurement data and position information can be automatically filtered according to preset conditions in the radio base station (or radio base station management server) and the positioning information management server, so that the processing load of the network system, The network transfer amount and the processing load on the user terminal can be adjusted.

Hereinafter, a network system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 or FIG. 2 is a block diagram showing a configuration example of a network system according to the embodiment.
1 and 2, the network system includes a wireless terminal 11, a wireless base station 12, a wireless base station management server 13, a positioning information management server 14, an Internet gateway 15, a user information management server 16, an Internet network 17, and the Internet. A terminal 18 is included.
The network system has a configuration in which a plurality of moving wireless terminals 11 and a plurality of Internet terminals 18 exchange data with each other.
That is, data communication between the wireless terminal 11 and the Internet terminal 18 is performed by being transmitted via the wireless base station 12, the wireless base station management server 13, the Internet gateway 15, and the Internet network 17.

The radio base stations 12 are provided geographically adjacent to each other, that is, provided for each area that covers reception of radio waves from the radio terminal 11, and continuous so that these areas are geographically overlapped with each other. A plurality of them are provided.
Each wireless terminal 11 transmits and receives data wirelessly to and from the wireless base station 12 that is in the vicinity of the location where it is located.

The radio base station management server 13 is connected to a plurality of radio base stations 12, and at least specific information for identifying the radio base stations 12 that can communicate with each radio terminal 11, and each radio terminal 11 Secure information or the like for secure connection is held as arbitrarily set holding information J1.
As the necessity of this connection information, since the wireless terminal 11 moves between areas of a plurality of wireless base stations 12, it is necessary for the Internet terminal 18 to specify the wireless base station 12 that can communicate with the target wireless terminal 11. Because there is.

The Internet gateway 15 is connected to a plurality of Internet terminals 18 via the Internet network 17, and transfer information necessary for transferring data transmitted from the wireless terminal 11 to the target Internet terminal 18. Secure information necessary for secure connection with the Internet terminal 18 is held as arbitrarily set holding information J2.
Here, each of the radio base station management server 13 and the Internet gateway 15 stores the stored information in a storage unit inside the apparatus.
In addition, the user information management server 16 which is a network device indicated by a broken line is installed as another configuration, and the stored information is stored in the storage unit of the user information management server 16 so that the radio base station management server 13, the Internet Each of the gateways 15 may access and read out as necessary to acquire the holding information and use it as the holding information J1 or J2.

In the present embodiment, position measurement of the wireless terminal 11 is performed based on information for position detection obtained from wireless signals received by the plurality of wireless base stations 12 from the wireless terminal 11.
For example, when the radio base station 12 receives a radio signal transmitted by the radio terminal 11, the radio wave intensity, phase, timing, azimuth ( When the radio base station 12 has a plurality of antennas, the azimuth angle of the radio wave source is measured, and the ID (IDentifier) of the radio base station or a combination thereof is acquired as measurement data.
The radio base station 12 also includes a measurement time (time stamp) as synchronization information for associating a plurality of measurement data in other radio base stations 12, synchronization identification information corresponding to the measurement time, and a terminal that identifies the radio terminal 11 Identification information is given to the measurement data.

The positioning information management server 14 uses the measurement data used to detect the current position of the wireless terminal 11 as position information (absolute position of the wireless terminal 11, terminal identification information of the wireless terminal 11, wireless base station 12). ID, measurement time or synchronization identification information).
This positioning information management server 14 is connected to the radio base station management server 13 and the Internet gateway 15, converts the measurement data acquired by the radio base station 12 into position information provided to the user, and stores an internal storage unit And the position information of the wireless terminal 11 is rewritten whenever necessary, for example, whenever the current position of the wireless base station 12 changes. Here, the position information provided to the user includes at least the position converted into the latitude / longitude converted from the measurement data and the measurement time (measurement time or synchronization identification information) at which the position is detected.

Further, when the radio base station 12 cannot acquire the measurement time, the positioning information management server 14 may add the measurement time corresponding to the position data when converting the measurement data to the position data. The network device (for example, the wireless base station management server 13) may add the measurement time.
As the position data, as the expression format, numerical data of latitude / longitude, data at other coordinates indicating the position, information such as an address, etc., and image information displaying a point indicating the position on the map The form is used.

In addition, as described above, the positioning information management server 14 has an algorithm indicating a flow of processing for converting measurement data into position data, and an absolute position (for example, latitude / longitude) of each radio base station 12 necessary for the conversion. A table or the like for associating (represented information) with the ID of the radio base station 12 is stored.
The above algorithm is based on a plurality of measurement data obtained for each wireless terminal 11, synchronizes the measurement times, and calculates the relative position from each wireless base station 12 to the wireless terminal 11 based on the principle of three-point surveying (for example, wireless After receiving the radio wave intensity from the terminal 11, the server converts the radio wave intensity into a distance, a table of radio wave intensity and distance is stored, the distance corresponding to the radio wave intensity is read, and the distance from each radio base station 12 And the center of gravity of this area is set as a relative position from each radio base station 12 or received from the radio terminal 11 at each radio base station 12, for example. The azimuth angle at which the radio wave arrives is calculated, three points where three straight lines extending in the arrival direction from each of the radio base stations 12 intersect are obtained, and the center of gravity of the triangular area formed by these three points is calculated as the radio terminal 11 And using the position of the wireless base station 12 in the above table (by the ID of the wireless base station 12 added to the measurement data, the wireless base station 12). 12), the absolute position of the corresponding radio base station 12 is read out from a table that associates the absolute position of 12 and the ID of the radio base station 12, and the position of the radio terminal 11 is converted into information on the absolute position such as latitude and longitude. Indicates the process to be identified.

  However, if the radio base station 12 or the radio base station management server 13 has sufficient calculation resources for the absolute position of the radio terminal 11 according to the above algorithm, the calculation of the absolute position of the radio terminal 11 of the positioning information management server 14 described above is performed. It may be performed in the radio base station 12 or the radio base station management server 13.

<Description of background positioning>
The network system in the present embodiment uses the position data obtained by the position measurement based on the background trigger of the wireless base station 12, obtains the absolute position of the wireless terminal 11 by the above-described processing, and notifies the obtained absolute position to the user. The location information providing service is realized.
The position information service (background positioning) triggered by the background is not based on a position measurement instruction from the wireless terminal 11 or the Internet terminal 18 of the user who wants to know the position of the wireless terminal 11, but is conscious of position measurement. When the wireless terminal 11 transmits the data being transmitted / received, the control signal for transmitting / receiving the data, and the confirmation signal instead of the transmitted data, the wireless data is transmitted based on the position data obtained from the data, the control signal, and the confirmation signal. This is a service for obtaining the absolute position of the terminal 11 and providing the obtained absolute position.

In this embodiment, at the time of acquisition of measurement data in each radio base station 12, measurement time or synchronization identification information can be given to the acquired measurement data.
As a result, the positioning information management server 14 integrates a plurality of measurement data, and conversion processing of the plurality of measurement data into the position information of the radio base station 12 occurs in the transmission path from each radio base station 12. Therefore, the reliability of the obtained position information of the radio base station 12 is improved.

  In the present embodiment, since the position of the radio base station 12 can be measured without using a dedicated radio signal (control signal), measurement data for position measurement is acquired by the plurality of radio base stations 12. In the mobile radio communication network of the form, the position of the radio terminal 11 is not accompanied by consumption of an additional radio band in addition to transmission / reception of original data and control information, and an increase in circuit scale and power consumption of the radio terminal. Measurement and providing location information to the user as required.

Specifically, a circuit (for example, a GPS function) necessary for position measurement processing in the wireless terminal 11, power for driving this circuit, and a clock function and measurement timing used for determining measurement start timing A processing circuit for performing the determination is not necessary.
In the present embodiment, the wireless terminal 11 is called from the network system and wireless communication for giving a position measurement instruction to the wireless terminal 11 or wireless communication for transmitting measurement data to the network system is not involved. In addition, a location information notification service can be realized.

As a result, the wireless terminal 11 according to the present embodiment can be configured in a small size because it is not necessary to add a new implementation (such as a GPS function).
In addition, since the wireless terminal 11 in this embodiment does not obtain position information by itself, the amount of calculation processing for obtaining position information and the amount of message transmission / reception processing necessary for obtaining position information are increased as in the conventional example. Therefore, power consumption is reduced as compared with the conventional example, the frequency of battery replacement is reduced, and a long-life terminal can be realized.
Furthermore, as described above, the wireless terminal 11 in the present embodiment does not need to wirelessly transmit and receive a message for obtaining location information, so the number of wireless terminals 11 accommodated per wireless base station 12 can be reduced. It can be increased as compared with the conventional example.
Further, according to the present embodiment, security in wireless communication at the time of acquiring position information is performed simultaneously with message transmission / reception such as transmission / reception of inherent data, so that strength equivalent to that of original data transmission / reception can be realized.

<Description of location information detection and location information notification>
Hereinafter, the background positioning process of the wireless terminal 11 in the network system according to the embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a sequence diagram illustrating an operation example of absolute position detection processing of the wireless terminal 11 in the network system according to the embodiment.
The wireless terminal 11 has no content for requesting positioning, and transmits data to other wireless terminals 11 and the Internet terminal 18, a control signal and a response signal for the wireless base station 12, etc. as transmission data (arbitrary message). Transmit to the base station 12 (sequence F1).
When the transmission data from the wireless terminal 11 is received, the wireless base station 12 detects and collects the measurement data for position measurement and acquires the measurement time in addition to the message processing (sequence F2) described above, triggered by this reception. Alternatively, synchronization identification information for synchronization is secured (sequence F3). Here, securing refers to a process of disabling the synchronization identification information so that it is not used as an identifier of another measurement time after acquisition because the synchronization identification information corresponds to the measurement time.

Next, the radio base station 12 adds its own ID, measurement time (or synchronization identification information), and terminal identification information to the measurement data, and transmits the measurement data to the radio base station management server 13 (sequence F4).
When the measurement data is received, the base station management server 13 transmits the measurement data to which the ID of the radio base station 12, the identification information of the radio terminal 11 and the measurement time are added to the positioning information management server 14 (sequence F5).
Then, the positioning information management server 14 combines (corresponds to) the measurement data from the plurality of radio base stations 12 by the terminal identification information and the measurement time (or synchronization identification information) according to an algorithm for obtaining the position of the internal radio terminal 11. And the absolute position (latitude, longitude, etc.) of the wireless terminal 11 is calculated from the associated measurement data, and the identification information of the wireless terminal 11 is stored in the internal storage unit together with the ID of the wireless base station 12 and the measurement time. Store and store as position information (Sequence F6, store if necessary, for example, if the calculated position is different from the previously calculated position, or store in a new order in a preset time range) .

Next, the positioning information management server 14 determines the position information of the wireless terminal 11 that has been positioned,
a. Push provision b. Simultaneous provision of data and location information c. Simultaneous provision of data response and location information d. Users are notified by four types of provision methods (details will be described later) of providing on-demand location information by background positioning. The flow described with reference to the sequence diagram of FIG. 3 is an operation of providing a push that immediately transmits the position information of the wireless terminal 11 to the Internet terminal 18 via the Internet gateway 15 when the measurement information management server 14 inputs measurement data. Is shown.

a. Push Providing FIG. 4 illustrates a sequence flow when providing location information of the wireless terminal 11 to the Internet terminal 18 by push provision.
Here, as described with reference to the sequence diagram of FIG. 3, push provision means that the wireless terminal 11 does not respond to a request from a terminal such as the wireless terminal 11 or the Internet terminal 18, but the wireless terminal 11 transmits data, controls information, or data. When an arbitrary message such as a response signal is transmitted, the position information obtained by the positioning information management server 14 based on the measurement data measured by the wireless base station 12 by the background trigger is immediately transmitted after the position information is calculated. This is a providing method for notifying the Internet terminal 18 that is transmitting / receiving data to / from the terminal 11 (or has made a transmission request for the location information of the wireless terminal 11 in advance).

  By this location information notification service using push provision, when the latest location information of the wireless terminal 11 can be acquired without the Internet terminal 18 sending a request for location information, data transmission / reception with the wireless terminal 11 is performed. It is possible to immediately provide the acquired position information to the Internet terminal 18 that is performing the operation.

b. Simultaneous provision of data and location information According to FIG. 5, the location information of the wireless terminal 11 is added to data to be transmitted to the Internet terminal 18 and provided to the Internet terminal 18 in the case of simultaneous provision of data and location information. A sequence flow will be described.
First, the wireless terminal 11 transmits data to be transmitted to the Internet terminal 18 to the wireless base station 12 (sequence F11).
Then, when receiving the data, the radio base station 12 acquires measurement data used for positioning the position from the received data (sequence F12), and the radio base station management server 13 obtains both the data and the measurement data. To send.

The radio base station management server 13 transmits the input measurement data to the positioning information management server 14, while transmitting data to be transmitted to the Internet terminal 18 to the Internet gateway 15.
Next, the positioning information management server 14 integrates the measurement data generated by the plurality of radio base stations 12 using the ID of each radio terminal 11 and the measurement time (or identification information for synchronization) of the measurement data. Using the ID and absolute position of each wireless base station 12, the information is converted into position information that is the absolute position of the wireless terminal 11, and then transmitted to the Internet gateway 15.
In the Internet gateway 15, the data received from the radio base station management server 13 and the position information received from the positioning information management server 14 are used using the identification information of the radio terminal 11 and the measurement time (or synchronization identification information). The data are combined (sequence F13) and transmitted to the Internet terminal 18 (sequence F14).

As described above, the Internet gateway 15 needs to combine position information and data in the simultaneous provision of data and position information.
For this reason, the following route control is required so that the location information and data finally pass through the same Internet gateway 15.
That is, the radio base station 12 or the radio base station management server 13 transmits an identifier for identifying the destination Internet gateway 15 to the positioning information management server 14 in addition to the measurement data, and the positioning information management server 14 transmits the destination Internet. There is a first method for selecting a transfer destination Internet gateway 15 based on the identifier of the gateway 15.

In this first method, the radio base station management server 13 adds the additional presence information indicating that the position information is added to the data to be transmitted to the Internet terminal 18 and then the identifier added to the measurement data to be paired. To the Internet gateway 15 shown.
At this time, the radio base station 12 or the radio base station management server 13 adds the transmission destination identification information of the data transmission destination Internet terminal 18 to the measurement data. Thereby, the positioning information management server 14 adds the transmission destination identification information to the position information obtained from the measurement data, and transmits the position information to the Internet gateway 15.
The Internet gateway 15 adds position information having the same transmission destination identification information (for example, the address of the Internet terminal 18) to the data to which the additional presence information is added, and this transmission destination identification information indicates This data is transmitted to the Internet terminal 18.

Further, the radio base station management server 13 and the positioning information management server 14 share a distribution rule using some packet-specific information such as the ID of the radio base station 12, measurement data, and measurement time (or synchronization identification information). There is a second method for determining the destination Internet gateway 15. Also in the second method, as in the first method, the Internet gateway 15 uses the additional information of the data and the destination identification information as a pair of the data and the corresponding position information, and the Internet terminal 18 On the other hand, data to which position information is added is transmitted.
According to one of the first and second methods described above, a method for selecting the Internet gateway 15 (transfer route control method) for combining simultaneously provided data and location information is required.

By the method of providing the data and the position information at the same time, the Internet terminal 18 can simultaneously acquire the data transmitted by the wireless terminal 11 and the position information of the wireless terminal 11 that transmitted the data.
Further, according to the method of providing data and location information at the same time, the Internet terminal 18 has data added to the data transmitted by the wireless terminal 11 to itself and the location information of the wireless terminal 11 when the data is transmitted. Therefore, by combining the position information with the data, the position information can be used in combination with the data.

  For example, in the case of a temperature notification application for a refrigerated container, the wireless terminal 11 is connected to a temperature sensor in the moving refrigerated container, and the Internet terminal 18 is installed in a management center that manages the refrigerated container. The temperature sensor in the refrigerated container notifies the temperature to the Internet terminal 18 through the wireless terminal 11. When transmitting the temperature data, the wireless base station 12 measures the position and the Internet gateway 15 transmits the combined data and position information, so that the Internet terminal 18 and the refrigerated container management center It becomes possible to acquire combination information of the temperature and location of the refrigerated container (the current position of the refrigerated container). As a result, it leads to improvement of traceability and quality control of food transported by refrigerated containers.

c. Simultaneous provision of data response and location information As shown in FIG. 6, the wireless terminal 11 responds to the response signal indicating that data is received from the wireless terminal 11 to the Internet terminal 18 that has transmitted data to the wireless terminal 11. The sequence flow in the case of simultaneously providing the data response signal and the position information provided to the Internet terminal 18 by adding the position information will be described.
Internet terminal 18 transmits data to wireless terminal 11 (sequence F21).
The wireless terminal 11 receives the data transmitted from the Internet terminal 18 via the Internet 17, the Internet gateway 15, the wireless base station management server 13, and the wireless base station 12 (sequence F22).

The radio base station 12 waits for a response signal to the data from the radio terminal 11 in order to confirm whether the data transferred by the radio base station 12 has reached the radio terminal 11 correctly.
For this reason, even when the wireless terminal 11 receives data, it is necessary to transmit a response signal to the data to the wireless base station 12 (sequence F23).
Therefore, when receiving the response signal of the data transmitted from the wireless terminal 11, the radio base station 12 acquires the measurement data for positioning from this response signal (sequence F24).

When receiving a response signal for data from the wireless terminal 11, the radio base station 12 transfers the response signal for the data to the Internet gateway 15 via the radio base station management server 13 and also via the radio base station management server 13. The measurement data is transferred to the positioning information management server 14.
The positioning information management server 14 integrates the measurement data generated by a plurality of radio base stations using the identification information of the radio terminal 11 and the measurement time (or identification information for synchronization), and the ID of each radio base station 12 After converting the absolute position information into the absolute position information of the wireless terminal 11, the information is transmitted to the Internet gateway 15.
In the Internet gateway 15, the response signal of the data received from the radio base station management server 13 and the position information received from the positioning information management server are already b. As described in the simultaneous provision of data and position information, the identification information of the wireless terminal 11 indicating the transmission source of the response signal (b. Corresponding to the data in the simultaneous provision of data and position information) and the measurement time (or synchronization) The identification information is combined (sequence F25) and transmitted to the Internet terminal 18.

As described above, the Internet gateway 15 needs to combine the position information and the response signal in the simultaneous provision of the response signal and the position information.
For this reason, the following route control is required so that the position information and the response signal finally pass through the same Internet gateway 15.
That is, the radio base station 12 or the radio base station management server 13 transmits an identifier for identifying the destination Internet gateway 15 to the positioning information management server 14 in addition to the measurement data, and the positioning information management server 14 transmits the destination Internet. There is a first method for selecting a transfer destination Internet gateway 15 based on the identifier of the gateway 15.

In this first method, the radio base station management server 13 adds the added presence information indicating that the position information is added to the response signal transmitted to the Internet terminal 18, and then adds the identifier added to the measurement data to be paired. To the Internet gateway 15 indicated by
At this time, the radio base station 12 or the radio base station management server 13 adds the transmission destination identification information of the Internet terminal 18 that is the transmission destination of the response signal to the measurement data. Thereby, the positioning information management server 14 adds the transmission destination identification information to the position information obtained from the measurement data, and transmits the position information to the Internet gateway 15.
Then, the Internet gateway 15 adds position information having the same transmission destination identification information (for example, the address of the Internet terminal 18) to the response signal to which the additional presence information is added. This response signal is transmitted to the Internet terminal 18 indicated.

Further, the radio base station management server 13 and the positioning information management server 14 share a distribution rule using some packet-specific information such as the ID of the radio base station 12, measurement data, and measurement time (or synchronization identification information). There is a second method for determining the destination Internet gateway 15. Also in the second method, as in the first method, the Internet gateway 15 uses the response signal additional presence information and the transmission destination identification information as a pair of the response signal and the corresponding position information, and the Internet A response signal to which position information is added is transmitted to the terminal 18.
By any of the first and second methods described above, b. Similar to the simultaneous provision of data and location information, a method for selecting the Internet gateway 15 (transfer route control method) for combining the response signal and the location information to be provided simultaneously is required.

As a result, the Internet terminal 18 can acquire the position information of the wireless terminal 11 at the time when the wireless terminal 11 receives the data transmitted by itself (when the wireless terminal 11 transmits a response signal to this data). Become.
That is, the Internet terminal 18 transmits data to the wireless terminal 11 and acquires information on the position of the wireless terminal 11 when the data is received; b. Similar to the simultaneous provision of data and position information, the data transmitted by itself and the position information of the wireless terminal 11 can be used in association with each other.

d. Providing On-Demand Position Information by Background Positioning FIG. 7 illustrates a sequence flow when the Internet terminal 18 obtains on-demand the position information of the wireless terminal 11 obtained by background positioning.
Processing until the radio base station 12 transmits a message (sequence F31), the radio base station 12 acquires measurement data from the message (sequence F32), and the positioning information management server 14 converts the measurement data into position information. Is a. The same as in the case of push provision.

In the positioning information management server, the latest several pieces of position information are associated with the terminal identification information for identifying the wireless terminal 11 together with the measurement time, accumulated in the internal storage unit, and the positioning process is terminated (sequence). F33).
Next, when the location information of the wireless terminal 11 is required, the Internet terminal 18 sends a location information request signal together with the terminal identification information of the wireless terminal 11 via the Internet 17 and the Internet gateway 15 to the positioning information management server 14. (Sequence F34).

When the position information request signal is input, the positioning information management server 14 uses the latest position information (position information history) stored in the storage unit corresponding to the terminal identification information of each wireless terminal 11. The position information corresponding to the terminal identification information is read, and the read position information is transmitted to the Internet terminal 18 as a response to the position information request signal.
Thereby, the Internet terminal 18 receives and acquires the requested position information of the wireless terminal 11 (sequence F35).

  However, when a plurality of positioning information management servers 14 are provided and calculation of position information from measurement data is distributed, the same wireless communication is always performed by a distribution method using information unique to the wireless terminal 11 such as terminal identification information of the wireless terminal 11. It is desirable that the location information of the terminal 11 is accumulated in the storage unit of the same positioning information management server 14. As this distribution method, for example, a correspondence table between the terminal identification number of the wireless terminal 11 and the positioning information management server 14 that calculates the position information of the wireless terminal 11 is stored in the storage unit in the wireless base station management server 13. Positioning information corresponding to the wireless terminal 11 by referring to the correspondence table according to the terminal identification information given to the data or response signal transmitted from the wireless base station 12 by the wireless base station management server 13 Measurement data is transmitted to the management server 14.

  Further, when a plurality of positioning information management servers 14 are provided and calculation of position information from measurement data is distributed, the same wireless communication is always performed by a distribution method using information unique to the wireless terminal 11 such as terminal identification information of the wireless terminal 11. It is desirable that the location information of the terminal 11 is accumulated in the storage unit of the same positioning information management server 14. The Internet gateway 15 stores, for example, a correspondence table between the terminal identification number of the wireless terminal 11 and the positioning information management server 14 storing the position information of the wireless terminal 11 in an internal storage unit. The position information is transmitted to the positioning information management server 14 corresponding to the wireless terminal 11 by referring to the correspondence table based on the terminal identification information of the wireless terminal 11 given to the position information request signal transmitted from the Internet terminal 18. A request signal is transmitted.

In addition, when the distribution at the wireless base station management server 13 and the Internet gateway 15 described above is impossible, the Internet gateway 15 receives all the positioning information management servers when receiving the location information request signal from the Internet terminal 18. An inquiry is made as to whether there is information on the wireless terminal.
Thereby, according to the on-demand provision of the location information of this embodiment, even when the Internet terminal 18 does not support push provision, the Internet terminal 18 is in a preset time range at the timing when the location information is requested. The requested number of the latest position information (position information history) can be acquired in response to the position information request signal.

<Filtering of measurement data or location information>
Next, the filtering process of position information in the radio base station 12 and the positioning information management server 14 will be described.
The generation of position information in the network system according to the present embodiment is triggered by reception of a message from the wireless terminal 11 in the wireless base station 12.
For this reason, in some cases, such as when the number of wireless terminals 11 is very large, providing the location information of all the wireless terminals 11 to the Internet terminals 18 may cause the processing load of the network system, the network transfer amount, It may lead to an increase in processing load.

Therefore, in the network system of this embodiment, a configuration in which only unnecessary position information is filtered in the radio base station 12, the radio base station management server 13, or the positioning information management server 14 will be described.
First, as a method of filtering only from single measurement data (each measurement data) or position information, the radio base station 12 or the radio base station management server 13 discards the measurement data at random, or the positioning information management server It is conceivable to discard the position information obtained in 14 at random.

  Further, when the radio base station 12 acquires measurement data, it may be discarded if the type and content of the received message do not meet the conditions. For example, if the message type is a control signal, deletion is stored in the storage unit in the radio base station 12, information for identifying the type added to the message is extracted, and the extracted type is deleted. Determine whether or not. In addition, since the amount of data transmitted by the wireless terminal 11 is large and the addition of data transmission increases when the packet is divided into many packets, a threshold is set according to the amount of information to be transmitted. A configuration in which data is deleted may be used.

  In addition, according to the contract type of the wireless terminal 11, it is determined beforehand by contract that position information is to be measured, and type information indicating the contract type is added to the terminal identification information of the wireless terminal 11, and the wireless base station Reference numeral 12 refers to a type table indicating correspondence between type information stored therein and measurement data deletion (or measurement data is not acquired from the beginning), and type information corresponds to deletion in the type table. When it is determined, the measurement data may be deleted.

With the above-described configuration, for example, when exchanging a series of authentication messages between the wireless terminal 11 and the wireless base station 12, the wireless base station 12 uses only the last message used for authentication to generate measurement data. Alternatively, the network processing load can be reduced as a configuration in which only the last message is converted into location information.
As another configuration, the radio base station 12 discards all measurement data and position information for a message trigger for control such as authentication of the radio terminal 11, and generates and provides position information using only the data and a response thereto as a trigger. There is also a method in which position information is generated and provided only when the data content matches information given in advance.

  Next, as a filtering method using past location information for each wireless terminal 11, the frequency of acquiring location information per time is preset in the wireless base station 12, and the wireless base station 12 When the number of acquisitions of the measurement data becomes a high frequency exceeding the set acquisition frequency per time, the measurement data acquired from the message of the wireless terminal 11 is discarded. In this case, the radio base station 12 accumulates the number of times of income for each terminal identification information of the radio terminal 11 in the period for determining the acquisition frequency, and resets to “0” at the beginning of the next determination period.

Further, the positioning information management server 14 may be configured to discard the newly obtained position information as long as the position has not greatly changed from the position information calculated immediately before.
In addition, the positioning information management server 14 determines that the newly obtained position information is within a specific value range (for example, if the position information is outside the map range to be displayed set by longitude / latitude). The configuration may be such that the position information is discarded.
In addition, the positioning information management server 14 compares the position information with other wireless terminals 11 and discards the information except when the conditions are met. For example, the positioning information management server 14 uses the position of the other wireless terminal 11 as a reference, displays the distance on the map when the distance from the position, and deletes the position information when the distance is longer than the set distance. To do.
As described above, in this embodiment, filtering for deleting measurement data and position information is possible.

As for the filtering method, if there are sufficient resources in the network system, only the location information of the wireless terminal 11 required by the Internet terminal 18 is provided by individually setting (customizing) the filtering conditions for each wireless terminal 11 And the processing load on the Internet terminal 18 can be reduced.
However, if the resources of the radio base station 12, the radio base station management server 13, and the positioning information management server 14 in the network system are not sufficient, the radio base station 12 or the radio base station management server 13 uniformly discards depending on the message type. By doing so, it is possible to reduce the amount of transfer between each server of the network system and the load of position information generation of the positioning information management server 14.

This filtering function filters useless information (measurement data or position information) in the radio base station 12, the radio base station management server 13, and the positioning information management server 14 before converting the measurement data into position information. By deleting them, the processing load and transfer load of the network system can be reduced, and a network system can be configured using a smaller number of servers than in the conventional example.
In addition, by performing intelligent filtering using the user-specific information and position information history for the calculated position information, the processing load and the transfer load for receiving the position information of the Internet terminal 18 are reduced, and the Internet The equipment cost of the user who uses the terminal 18 can be reduced.

It is a block diagram which shows the structural example of the network system by one Embodiment of this invention. It is a block diagram which shows the structural example of the network system by other embodiment of this invention. It is a sequence diagram explaining the production | generation and notification of the positional information of the network system of FIG. It is a conceptual diagram which shows the flow of the push provision of the positional information in the network system of FIG. It is a conceptual diagram which shows the flow of simultaneous provision of the data and position information in the network system of FIG. It is a conceptual diagram which shows the flow of simultaneous provision of the response signal with respect to the data in the network system of FIG. 1, and position information. It is a conceptual diagram which shows the flow of the on-demand provision of the positional information by the background positioning in the network system of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Wireless terminal 12 ... Wireless base station 13 ... Wireless base station management server 14 ... Positioning information management server 15 ... Internet gateway 16 ... User information management server 17 ... Internet network 18 ... Internet terminal

Claims (9)

A network system composed of a wireless terminal, a wireless base station, a positioning information management server, and a user terminal,
A plurality of the radio base stations are
Transmission data transmitted by the wireless terminal to the user terminal, a response signal indicating reception of received data from the user terminal, control information transmitted by the wireless terminal to the wireless base station, or from the wireless base station Measurement data required to receive a response signal indicating that reception control information has been received, transfer the transmission data, control information, or response signal to a user terminal, and detect a distance or direction from the wireless terminal to itself Is extracted from the transmission data or response signal,
The positioning information management server is
A network system, wherein the position of the wireless terminal is detected from measurement data input from a plurality of the wireless base stations and output as position information. The wireless base station adds terminal identification information for identifying the wireless terminal and synchronous identification information indicating measurement time or measurement time to the extracted measurement data, and transmits to the positioning information management server,
The positioning information management server determines the position of the wireless terminal by combining the measurement data input from each of the wireless base stations by the measurement time or a synchronization signal indicating the measurement time. 1. The network system according to 1. An Internet gateway for transferring the transmission data and response signal from the wireless terminal to the user terminal;
The network system according to claim 2, wherein the transmission data and the position information are transmitted to the user terminal in combination with the terminal identification information and the measurement time or a synchronization signal indicating the measurement time. An Internet gateway for transferring the transmission data and response signal from the wireless terminal to the user terminal;
The network system according to claim 2, wherein the response signal and the position information are transmitted to the user terminal in combination with the terminal identification number and the measurement time or a synchronization signal indicating the measurement time.   When the positioning information management server accumulates position information for each wireless terminal in the internal storage unit and receives a position information request signal from the user terminal, the terminal identification information included in the position information request signal is received from the internal storage unit. The network system according to claim 1 or 2, wherein position information of a corresponding wireless terminal is transmitted to the user terminal.   6. The network system according to claim 1, wherein the position information calculated by the positioning information management server is randomly deleted.   6. The network system according to claim 1, wherein the radio base station deletes the measurement data according to a type of the transmission data and response signal transmitted from the radio terminal.   The wireless base station has a table indicating whether or not to calculate position information for each wireless terminal, and does not extract measurement data of the wireless terminal that does not detect position information. The network system according to any one of claims 1 to 5. A wireless terminal position detection method in a network system composed of a wireless terminal, a wireless base station, a positioning information management server, and a user terminal,
A plurality of the radio base stations are
The wireless terminal receives a transmission signal transmitted to the user terminal or a response signal indicating reception of data received from the user terminal, transfers the transmission data or the response signal to the user terminal, and the wireless terminal. A process of extracting measurement data necessary for detecting a distance or direction from itself from the transmission data or response signal;
The positioning information management server is
A method of detecting a position of the wireless terminal from measurement data input from a plurality of wireless base stations and outputting the position information as position information.

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