JP2621802B2 - Mobile station location information notification method in mobile communication - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mobile communication network,
The present invention relates to a method of notifying the location of a mobile station.

[0002]

2. Description of the Related Art Conventionally, a service area of a mobile communication system is constituted by a control zone comprising a plurality of base stations (BS) as shown in FIG. Mobile station (P
The location information of the control zone of S) is provided by the mobile switching center (MRC)
Via the home location register (HLR). The updating of the location information is performed by a location registration procedure when the mobile station moves to a different control zone.

For example, assume that a mobile station (PS) is located in a control zone A as shown in FIG. At this time, when the mobile station moves to the control zone B, the mobile station transmits location registration information to the mobile switching center (MRC) via the base station (BS) belonging to the control zone B. When the mobile switching center receives the location registration information, the home location register (HL)
R) is registered as new location information (location control zone) of the mobile station.

Conventionally, when a mobile station attempts to know its own location information, a method of notifying the above-mentioned control zone information, that is, a control zone including a plurality of base stations, as the location of the mobile station (for example, Japanese Patent Laid-Open Publication No. 24136 and Heikai 1-
107233). FIG. 6 is a configuration diagram of a conventional position information notification system for notifying the position of a mobile station in mobile communication. 31 is a mobile switching center (MRC), 3
21, 322 and 323 are base stations (BS) arranged in the same control zone, 33 is a mobile station (PS), and 34 is position information of the mobile station 33 (control zone where the mobile station 33 is located).
Home location register (HL
R), 391, 392 are central control units (CC), 38
1, 382 are common channel signaling equipment (CSE), 35 is a local exchange (LS), 37 is a local telephone terminal (TE), 36
Is an audio response device (ARE). The subscriber switching center 35 is provided with a special number as a reception number for notifying the control zone information of the mobile station 33, and has a voice response device 36.

[0005] First, the subscriber telephone terminal 37 performs a calling operation with a dial special number for knowing the location of the mobile station 33. When the subscriber telephone terminal 37 dials a special number, for example, "01 + the subscriber number of the mobile station 33 + the recite number for using the service", the central office 392 of the subscriber telephone exchange 35 receiving this dials the common line signaling device from the special number. 381, 382
It requests the mobile switching center 31 for the location information of the mobile station 33 via the terminal. The mobile switching center 31 requests the home location register 34 from the central control unit 391 for positional information on the location of the mobile station 33. In the home location register 34, the mobile station 33
The mobile switching center 31 sends information indicating that the mobile switching center 31 is located in the control zone consisting of the mobile switching center 31 and the mobile switching center 31.
Are transmitted from the central control unit 391 to the common line signal units 381, 3
The location information, which is the control zone where the mobile station 33 is located, is sent to the local exchange 35 via 82. The central office 392 reports the location information of the mobile station 33 from the voice response unit 36 to the central office 37.

[0006]

In this conventional system,
Location information about the control zone where the mobile station is located can be obtained. However, in a general mobile communication system, the size of this control zone extends from several kilometers to several tens of kilometers in radius, so that the You can only know the position of. For example, even if found to be located in the control zone where there is a mobile station as shown in FIG. 7, whether being in the base station BS ₁ to BS ₇ throat radio zone is not known. There is also a method of initiating a call with the mobile station to obtain detailed location information and directly talking with a person using the mobile station.However, the mobile station is already in a call with another call or In some cases, a call cannot be made directly because the call is not answered. Further, there is a problem that even if a call is made, objective accuracy cannot be expected (a mobile station user cannot always accurately convey his / her own position).

An object of the present invention is to store the location information of a mobile station in a radio zone of a base station (radius of several tens of meters to several kilometers).
It is an object of the present invention to provide a mobile station position information notifying method that makes it possible to obtain high-accuracy position information by eliminating communication with the mobile station.

[0008]

According to the present invention, there is provided a mobile communication system comprising:
The mobile station location information notification method is that the base station always
Each time the mobile station location registration information transmitted by
Adds location information indicating the control zone of the base station to the mobile
To the home memory station of the mobile station via the exchange.
Update and register as mobile station location information, and
When there is a request for call setup from a mobile station to any mobile station,
Is sent to the mobile switching center where the queried mobile station is registered.
Connected and dialed based on mobile subscriber number
The home memory station in which the mobile station is registered.
In mobile communication networks where location information of mobile stations is detected
In the mobile station location information notification method, the communication
In response to a request for notification of location information of any mobile station,
Location information of the mobile station obtained from the home memory station of the station
With reference to the exchange, the exchange accommodating the communication terminal responds.
Location containing the mobile station's subscriber number
Transmitting a registration request signal;
The mobile switching center that has received the signal
Causing the base station to transmit the location registration request signal
The mobile switching center responds to the location registration request signal.
Each base station that has received the location registration signal of the mobile station
The signal transmitted with the value of the reception quality added to the location registration signal
Receive and compare the value of the reception quality to obtain the best communication quality
Selecting the base station and the value of the reception quality.
In comparison, the selection of the base station with the best communication quality
The exchange, which places the result in the exchange
And a switching center accommodating the communication terminal.
Performs voice conversion of the location information received from the mobile switching center.
To the exchange that accommodates the held communication terminal.
Includes the step of reporting to the requesting communication terminal through the line
It is characterized by doing.

[0009]

[0010]

[0011]

According to the present invention, a location registration request signal is added to a call control procedure signal between a mobile switching center (MRC) and a base station (BS) and between a base station and a mobile station (PS). That is, the mobile switching center requested to notify the mobile station location information first queries the home location register (HLR) via the mobile switching center for the control zone where the mobile station is located, and checks the control zone where the mobile station is located. After obtaining the position information, a position registration request signal is transmitted to each base station located in the control zone. This signal contains the subscriber number of the mobile station.

Each base station that has received the location registration request signal transmits a location registration signal to the mobile station. The mobile station receiving the location registration signal first checks whether the subscriber number included in the location registration request signal is equal to its own subscriber number, and determines that it is a location registration request for itself if they are equal, Transmit the location registration signal. This location registration is performed only for the base station from which the mobile station has received the location registration request signal.

The base station that has performed the location registration procedure includes the subscriber number of the mobile station and the value of radio wave reception quality in the location registration signal, and transmits the location registration signal to the mobile switching center. The base station for which the location registration procedure has not been performed ignores the location registration request due to timeout.

The mobile switching center compares the location registration signal including the subscriber number of the mobile station that has received the location information notification request, and determines the mobile station seeking the radio zone of the base station having the best radio wave reception quality. It is determined that it is located, and the obtained location information is notified to the subscriber telephone terminal (TE).

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram of one embodiment of the present invention, FIG. 2 is a sequence diagram of a mobile station position information request procedure in FIG.
3 and 4 are schematic flowcharts of the procedure processing in FIG. 1, FIG. 5 is an information element showing an INFO message of activation of an additional service of the ISDN terminal and its response display, FIG. 6 is a configuration diagram of a conventional position information notification system, FIG. 3 is a diagram showing a relation between a control zone and a base station wireless zone.

Referring to FIG. 1, reference numeral 11 denotes a mobile switching center (MR).
C), 121, 122 and 123 are base stations (BS) located in the same control zone, 13 is a mobile station (PS), 1
4 is a home location register (HLR), 15 is a local exchange (LS), 16 is a voice response unit (ARE) installed in the local exchange 15, and 17 is a telephone terminal (TE), 181, 182. Is a common channel signaling unit (CSE) connecting the mobile switching center 11 and the local exchange 15. The subscriber telephone exchange 15 is provided with a special number for requesting the location information of the mobile station 13.

First, the subscriber telephone terminal 17 performs a calling process using a dial special number in order to obtain the location information of the mobile station 13. The local exchange 15 analyzes the received digits and converts them into the mobile station 13.
Is determined to be the position information request of the common line signaling device 1
It notifies the mobile switching center 11 via 81 and 182.

The mobile switching center 11 queries the home location register 14 for the control zone where the mobile station 13 is located. The mobile switching center 11 obtains the base stations 121, 122 and 123 located therefrom from the obtained control zone, and joins the mobile station 13 so as to register the location of the mobile station 13 with each base station. A location registration request signal including the user number is transmitted.

Upon receiving the location registration request signal, the base stations 121, 122 and 123 transmit a location registration request signal including the subscriber number of the mobile station 13 so as to perform location registration of the mobile station 13.

Upon receiving the location registration request signal, the mobile station 13 first checks whether the subscriber number included in the signal is equal to its own subscriber number, and if they are equal, determines that the location registration request is for itself. Then, a position registration signal is transmitted. This location registration is performed by transmitting the location registration request signal to the mobile station 13.
Is performed only for the base stations (121 and 123 in this example) that have been able to receive.

The base station 12 that has received the location registration signal
Reference numerals 1 and 123 include the subscriber number of the mobile station 13 and the value of radio wave reception quality in the location registration signal and notify the mobile switching center 11 of the location. In addition, when the location registration request times out, the base station 122 that has not received the location registration signal of the mobile station 13 ignores the request and does not notify the mobile switching center 11 of anything.
The mobile switching center 11 compares the location registration signal including the subscriber number of the mobile station 13 that has received the location information notification request, and determines the value of the radio wave reception quality of the base station (121 in this example).
It is determined that the mobile station 13 required in the wireless zone of
The location registration information is reported to the local exchange 15 via the common line signaling devices 181 and 182. The subscriber telephone exchange 15 converts the obtained location registration information into voice using the voice response device 16 and notifies the subscriber telephone terminal 17 as location information.

Next, when an ISDN terminal is used in place of the general subscriber telephone terminal 17, a feature activation indicating activation of a supplementary service and an ISDN of a feature indication responding to the feature activation instead of a special number are provided.
Transmission and reception by the call control message INFO can be performed. For example, it is possible to convert the obtained position information into a map and display it on the ISDN terminal with good visibility. FIG. 5 shows an example of information elements included in the additional service activation (feature activation) of the ISDN terminal and the additional service display (feature indication) in response thereto.

In the description of the above embodiment, the inquiry about the location of the mobile station is made from the subscriber telephone terminal via the subscriber telephone exchange. Alternatively, inquiries from other mobile stations can be made to each of the configured mobile switching stations with a special number for requesting the location information of the mobile station, via the mobile switching station. Some things can be easily understood from the description of this embodiment.

[0024]

As described above, according to the present invention, the position information of the mobile station can be specified in the radio zone (radius of several tens of meters to several kilometers) of the base station. ~ Hundreds of kilometers)
The accuracy is improved as compared with. Also, since there is no need to talk to the mobile station, this scheme can be used regardless of whether the mobile station is communicating with another call or not answering the call. Further, there is an effect that the information has objective accuracy even if the user of the mobile station does not accurately convey his / her location.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram according to an embodiment of the present invention.

FIG. 2 is a sequence diagram of a mobile station location information request procedure in FIG.

FIG. 3 is a schematic flowchart (1) of a procedure process in FIG. 1;

FIG. 4 is a schematic flowchart (2) of the procedure processing in FIG. 1;

FIG. 5 is an information element showing an INFO message indicating activation of a supplementary service of an ISDN terminal and a response display thereof.

FIG. 6 is a configuration diagram of a conventional position information notification system.

FIG. 7 is a diagram showing a relationship between a control zone and a base station wireless zone.

[Explanation of symbols]

11, 31 mobile switching center (MRC) 121-123, 321-323 base station (BS) 13, 33 mobile station (PS) 14, 34 home location register (HLR) 15, 35 subscribed telephone exchange (LS) 16 , 36 Voice response unit (ARE) 17, 37 Subscriber telephone terminal (TE) 181-182, 381-382 Common line signaling unit (CSE) 391-392 Central control unit (CC)

Claims (1)

(57) [Claims] 1. A base station which is always a mobile station originating from a mobile station
Each time location registration information is received, the information is controlled by its own base station.
The location information indicating the zone is added, and the
The location information of the mobile station relative to the home memory station of the mobile station
Information, and update from any communication terminal to any mobile station.
Request to set up the call, the requested call is
The mobile station is connected to the registered mobile switching center and
Mobile station based on the subscriber number of the mobile station
Location information of mobile station by registered home memory station
Mobile station location information notification in mobile communication
In the method, Request for notification of location information of any mobile station from any communication terminal
In response, the mobile station obtained from the home memory station
Accommodates the communication terminal by referring to the location information of the mobile station
The switching center joins the mobile station to the answered mobile switching center;
Transmitting a location registration request signal including the user number; The mobile switching center that has received the location registration request signal corresponds to
The location registration request signal to all base stations in the control zone
The step of causing The mobile switching center has responded to the location registration request signal.
Each base station that has received the mobile station's location registration signal
Receives the transmitted signal with the reception quality value added to the registration signal
Then, the values of the reception quality are compared, and the base of the best communication quality is obtained.
Selecting a local office; By comparing the values of the reception quality, the base station with the best communication quality
Is made at the mobile switching center and the result is
Replying to an exchange accommodating a terminal;
The exchange accommodating the terminal received from the mobile exchange
The communication terminal, which has converted the position information by voice, and
To the requesting communication terminal through the line to the exchange that accommodates
Reporting a mobile station position having the step of reporting
Information notification method.