JPH066293A - Call search control method - Google Patents

Abstract

PURPOSE:To execute a call search from other exchange than a call control station by performing a monitor request to the call control station from other exchange than the call control station such as a registered station, etc., at the time when there is a speech monitor request. CONSTITUTION:When a maintenance person registers a call search, a registered station MCC3 goes to a home memory station (HM) 1 in order to read out mobile machine information. The registered station MCC3 fetches a call control station number RN1 and LM information of a mobile station, and when the mobile machine is not speaking by deciding from the LM information, a fact that a speech search is going on is registered in the HM1 in preparation for the call search. When the search call becomes busy, the HM1 executes a speech start report to the registered station MCC3. Also, when the mobile machine is busy or the registered station MCC3 receives the speech start report from the HM1, the registered station MCC3 requests a speech circuit search for collecting line information of the search call to a call control station MCC1. Subsequently, the call control station MCC1 executes extraction of a circuit in which the search call is busy from a subscriber's number SBN.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method capable of simplifying a call monitor of a mobile unit even when channel switching occurs during a call as the mobile unit moves.

[0002]

2. Description of the Related Art FIG. 4 shows a call control method in a conventional mobile communication system. The conventional system has a feature that the call control station moves as the mobile device moves. Further, since the conventional system has a form in which one station accommodates one or more location registration areas, the location information of the mobile device stored in the home memory station (HM2) is used as the search target. It is possible to determine the exchange to which the call is connected. Therefore, the mobile device information has only position information (LI) and information (LM information) indicating whether or not a call is in progress.

FIG. 5 shows a call search control method in a conventional system. In the figure, the call control station is changed by channel switching accompanying the movement of the mobile device. Further, since the maintenance person cannot make call search registration from the registration station MCC6, it is necessary to call the maintenance person of the call control station by telephone to request a call search. In this figure, when the maintenance person 2 of the registration station MCC6 requests a call search, he goes to the HM2 to read out the mobile station information.
Based on the information, the maintenance person 2 discriminates the call control station and determines the call control station M.
The maintenance person 3 of CC5 is contacted by telephone and a call search registration request is made. The maintenance person 3 performs call search registration and calls the maintenance person 2 by telephone. This will be described with reference to the functional block configuration diagram of FIG. 6. When the maintenance person 2 of the registration station MCC6 conducts a call search, when the mobile device information read request is issued from the IO device 10, the mobile device information read device 11 causes the home memory station ( The mobile station information request signal is transmitted from the signal exchange apparatus 13 for the exchange to the HM2), and the HM2 returns the information in the mobile station information storage apparatus to the registration station MCC6. Registration Authority MCC
In 6, the presence / absence of a call is determined by the call determination device 12 based on the LM information, and the mobile device information reading device 11 notifies the maintenance person 2 of the mobile device information via the IO device 10. If the maintenance person 2 who has read the mobile device information from the IO device 10 is in a call, the maintenance person 2 judges the call control station MCC5 from the position information LI2,
The maintenance person 3 of the call control station MCC5 is contacted by telephone to request a call search registration. The maintenance person 3 of the call control station MCC5 is an IO
The call search and registration is performed by the device 17, the call line is extracted by the call line search device 18, and the result is telephone-contacted to the maintenance person 2 of the registration station MCC6.

[0004]

As described above, in the call search control method of the conventional system, only the call control station can perform the call search registration, and the call search is performed from a certain switching center in the mobile network. , The mobile memory information of the home memory station is read, the call control station is discriminated, the maintenance engineer of the registration station makes a telephone call to the maintenance engineer of the call control station, requests the call search registration, and returns the call search result. The call control station maintenance person had to contact the registration station maintenance person by telephone to notify him, which was a disadvantage of low maintenance efficiency.

The object of the present invention is to solve the problem that the call search and registration can be performed only by the call control station of the conventional system, and the call search and registration can be performed without being a specific switching center in the mobile network.
Another object of the present invention is to provide a new means capable of performing a call search at the start of a call of a mobile device if the call search is registered even when the mobile device is not in a call state.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a registration station which is a switching center where a maintenance person registers a call search, a call control station which is a switching center which controls a call of a mobile station, and a subscriber. In a mobile communication system including a home memory station that stores mobile station information including location information, a call control station number, and information indicating whether or not a call is in progress, the registration station requests the mobile station call search request from the maintenance person. In response to the request, the home memory station is requested to read mobile unit information including position information regarding the mobile unit, a call control station number, and busy information indicating whether the mobile unit is busy, The memory station reads the mobile station information and notifies the registration station, and if the mobile station is in a call, the registration station determines the call control station based on the call control station number, and then The registration station requests the call control station to perform a call search, The master station searches for a call relating to the mobile station and returns the result to the registration station. The registration station is searching for a call to the home memory station if the subscriber has no call based on the busy information. When the home memory station detects that a call has started, the home memory station notifies the registered station that the call has started, and performs the call search described above. .

[0007]

The present invention focuses on adopting the line control method in which the call control station does not change even if the channel is switched during a call.
When a call monitor request is issued, an exchange station other than the call control station, such as a registration station, sends a monitor request to the call control station, so that a call can be searched from the exchange stations other than the call control station.

[0008]

FIG. 2 shows a call control system in a large-scale mobile communication system adopting the subscriber line extension system (Japanese Patent Laid-Open No. 2-15722) which is the background of the present invention. In this system, a plurality of switching centers MCC are accommodated in one location registration area. When the switching center MCC1 detects the origination of the mobile station, the switching center MCC1 informs the home memory station (HM1) storing the mobile station information whether or not the call is in progress (LM information) and the location information (LI) of the mobile station. ) And a call control station number (RN) indicating that the local exchange is performing call control. In this case, the switching center MCC1 controls the call until the end of the call and becomes the call control station. When the mobile device moves, the call control station MC
C1 establishes a line to the switching center MCC2 (located station) in the area where the mobile device exists, and continues the call.

FIG. 1 shows a call control method in a large-scale mobile communication system which is one application system of the call search control method of the present invention. In the figure, MCC3 is a registration station that is a switching center with which the maintenance person 1 registers a call search, MCC1 is a switching center that receives a call from a mobile station, and is a call control station that controls a call until the end of call. MCC2 is a serving station which is an exchange station in the area where the mobile device exists, HM1 is a home memory station which stores mobile device information of the mobile device, and the mobile device information indicates whether or not the mobile device is in a call. It has information (LM information), location information (LI) of the mobile station, and a call control station number (RN) indicating the call control station of the mobile station. LI1 and LI2 indicate the location registration area of the mobile device stored in HM1, RN1 indicates the call control station number of the mobile device, and callee 1 indicates the callee of the mobile device such as a fixed network.

FIG. 3 shows a call search control procedure in the present invention. When a call search is performed by this system, when the maintenance person registers the call search in (a), the registration station MCC3 sends HM1
To read the mobile device information. Registration Bureau MCC3 is (b)
At, the LM information of the call control station number RN1 and the mobile station is retrieved. The registration station MCC3 judges from the LM information that if the mobile device has no call, then in (c) the HM1 registers that it is searching for a call in preparation for a call search. In (d), the HM1 reports a call start to the registration station MCC3 when the search call becomes busy. Further, when the mobile station is in a call or the registration station MCC3 receives a call start report from the HM1, the registration station MCC3 receives the call line for collecting line information of the search call from the call control station MCC1 in (e). Make a search request. The call control station MCC1 extracts the line during the search call from the subscriber number SBN.

FIG. 7 shows a functional block configuration diagram of a call search control system according to the present invention. In the present invention, a call line search request device 27 for sending a search request signal to the call control station MCC1 is added to the registration station MCC3 because call search registration can be performed without being a specific switching center in the mobile network. , Call control station M
A call line information collection device 22 for receiving a call line extraction result from CC1 is added, and in the home memory station HM1, a call control station number RN indicating which exchange station is performing call control in the mobile device information storage device. Call control station M
In CC1, the call line search device 44 is connected to the registration station MC.
A call line search control circuit 42 is added to activate from C3 and notify the registration office of the extraction result of the call line. In addition, a call line search registration processing device 26 is added to the registration station MCC3 so that the call search can be performed at the start of the call of the mobile device when the mobile device does not make a call. A call start control circuit 32 for registering the fact that it is being registered is added, and a call start report processing device 33 for making a call start report to the registration station MCC3 when the mobile device starts a call.

Registration office M registered for call search by maintenance person 2
CC3 sets the lines of the signal transmission / reception devices 23 and 304 for the exchange to read the mobile station information to the home memory station HM1, and the mobile station information reading device 21 causes the home memory station HM1 to read.
The mobile station information of the mobile station information storage device of No. 1 is the mobile station information of the call control station number RN1 and the LM information and the location information LI2 indicating the exchange that is controlling the call of the mobile station. The mobile device information reading device 21 passes through the mobile device information control circuit 24 to determine whether or not the call is in progress.
The LM information is sent to 5, and it is determined whether the call is in progress or not. If a call is in progress, the mobile station information reading device 21 determines the call control station from the call control station number RN1, and the mobile station information control circuit 2
4 activates the call line search control circuit 42 of the call control station MCC2, and issues a call search request signal to the call control station MCC1. When the call line search control circuit 42 of the call control station MCC1 receives the call search request signal, it activates the call line search device 44,
A call search is performed and the extraction result is transmitted to the call line information collection device 22 of the registration station MCC3. The call line information collecting device 22 transfers the call line extraction result to the IO device 20, and the maintenance person 2 can obtain the extraction result. Call determination device 2
From FIG. 5, if the search call is a non-call, the mobile device information control circuit 24 activates the call line search registration processing device 26 and sends a call search registration signal to the call start control circuit 32 of the home memory station HM1 to make a call. It registers that it is in the process of searching, and prepares for the call start of the mobile device. When the mobile device status collection device 43 of the call control station MCC1 senses the start of a call from the mobile device, the mobile station information storage device of the home memory station is rewritten by the mobile station information storage device of the home memory station from the exchange station signal transmitting / receiving device 41. When the LM information is rewritten, the call start control circuit 32 of the home memory station HM1 activates the call start report processing device 33,
A call start report is sent to the mobile station information control circuit 24 of the registration station MCC3. When the mobile device information control circuit 24 confirms the status of the search call reporting call, the mobile device information control circuit 24 carries out the above-mentioned call line search.

[0013]

As described above, according to the present invention, it is possible to perform call search registration from a switching center other than the call control center, and to search for a call in the home memory station even when the mobile station is idle. After registering, you can search for a call when the mobile device starts talking.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a control method which is a premise of the present invention.

FIG. 3 is a diagram showing a call search control procedure of the present invention.

FIG. 4 is a diagram showing a call control method in a conventional system.

FIG. 5 is a diagram showing a conventional call search control method.

FIG. 6 is a functional block configuration diagram of a conventional system.

FIG. 7 is a functional block configuration diagram of a system according to the present invention.

[Explanation of symbols]

 26 call line search registration processing device 27 call line search request device 32 call start control circuit 33 call start report processing device 42 call line search control circuit 44 call line search device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hironari Kobayashi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (1)

[Claims] 1. A registration station, which is a switching center in which a maintenance person registers for call search, a call control station, which is a switching center in which a call of a mobile unit is controlled, subscriber location information, and a call control station number. In a mobile communication system including a home memory station that stores mobile station information including information indicating whether a call is in progress, the registration station receives the call search request for the mobile station from the maintenance person, The station requests the station to read mobile station information including location information about the mobile station, a call control station number, and busy information indicating whether the mobile station is busy, and the home memory station reads the mobile station information. The registration station, the registration station determines the call control station based on the call control station number from the call information, and then the registration station determines the call control station. Request call search from
The call control station searches for a call relating to the mobile station and returns the result to the registration station. The registration station searches the home memory station for a call if the subscriber has no call based on the busy information. When the home memory station detects that the mobile device has started a call, the home memory station notifies the registered station that the call has started, and performs the call search described above. Search control method.