JP2000023231A - Automatic reconnection method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reconnect with the other user who was talking after the recovery from the radio line failure. When a radio line failure is detected in a call being communicated with a mobile communication switching center C, the mobile communication switching center C inquires of a location register V whether reconnection is permitted or not and a waiting time for reconnection. If there is, the communication path with the partner user X is maintained and the line only on the mobile device S side is released. The mobile station S that has detected the failure of the wireless line during communication performs a location registration request to the mobile communication network M when the recovery of the wireless line is detected after performing the release processing. The location register V transmits a connection request to the mobile communication switching center C again as a cause of the radio line recovery, and the mobile communication switching center C receives the reconnection request and, after receiving the reconnection request, the call holding the communication path with the partner user X. From mobile station S
By performing the same processing as the incoming call processing, the communication path between the mobile device S and the partner user X is restored again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic reconnection method, and more particularly to an automatic reconnection method after recovery from a radio link failure during a call in a mobile communication system.

[0002]

2. Description of the Related Art A conventional automatic reconnection method of this kind will be described with reference to the drawings.

FIG. 15 is a sequence diagram showing an example of a conventional automatic reconnection method and showing a case where recalling is set up after recovery from a radio channel failure on the called side.

[0005] In FIG. 15, when the user Y completes the dialing operation to the mobile station A in the mobile station Y, a "call setting" signal is transmitted to the mobile communication network 1 (FIG. 15a). In the present embodiment, when the mobile station Y generates the "call setting" signal, it transmits "transmission capability" information, "calling number" information, "calling number" information, "calling / receiving type" information, and the like to the wireless channel. The information is stored for restricting outgoing calls to mobile devices other than the mobile device in which a failure has occurred or restricting incoming calls from devices other than the mobile device in which a radio channel fault has occurred.

When the "call setting" signal transmitted from the mobile station Y is received by the mobile communication network 1, the mobile communication network 1 selects the radio line of the mobile station A specified by the called number information.
The mobile station A is notified as a “call setting” signal for notifying the incoming call.

[0006] The mobile station A that has received the "call setting" signal from the mobile communication network 1 stores the call setting information included in the "call setting" signal as call setting information A for recall setting.

[0007] In FIG. 15, after “communicating”,
When the synchronization of Layer 1 of the mobile device A is lost (FIG. 15S) and a time longer than the instantaneous interruption can be considered, the radio channel of the mobile device A is abnormally released, and the call state transits to a boring state (FIG. 15). 15q). Further, according to the present invention, a failure monitoring timer set by the user A in advance is started (FIG. 15).
v). If the radio channel fault is recovered during the start of the fault monitoring timer (FIG. 15w), the stored call setting information A
, A "call setting" signal B is generated and transmitted to the mobile communication network 1, whereby the mobile station Y is automatically re-set (FIG. 15x). When the “call setting” signal is generated, the “calling / receiving type” of the call setting information A stored by the mobile device A is “incoming”.
Therefore, the "calling number" stored as the call setting information
In the “call destination number” information in the “call setting” signal,
Is set to the "calling number" information in the "call setting" signal.

On the other hand, in FIG. 15, due to abnormal release of the radio channel of mobile unit A, the base station of mobile communication network 1 in which mobile unit A has been registered has lost the synchronization of the radio channel of mobile unit A for a short period of time. When the above-described detection is made, the wireless channel failure of the mobile station A is recognized, and a "disconnection" signal is sent to the mobile station B as the cause display information. (FIG. 15n,
p).

[0009] In this automatic recall system, when the mobile station Y is further disconnected and released in "other terminal failure" and transits to an empty state (Fig. 15r), a call restriction timer preset in advance with a timer value is activated. (FIG. 15z).

[0010] If there is an incoming call from the mobile station A in which the radio channel failure has occurred before the call termination timer of the mobile station Y expires, the automatic recall setting procedure is completed (Fig. 15y). In addition, it is also possible to manually make a call to the mobile station A in which a radio channel failure has occurred before the expiration of the call termination timer.

[0011] While the transmission / reception restriction timer is running, transmission to other than the mobile station having a radio channel failure is restricted based on the call setting information A stored by the mobile station Y, and incoming calls from other than the mobile station having the radio channel failure have been made. Regulate. Specifically, when restricting the transmission of a radio channel failure to a device other than the mobile device, since the “call type” of the call setting information A stored by the mobile device Y is “transmission,” The dial from the keyboard 8 is compared with the “callee number” of the stored call setting information A, and if they do not match, the outgoing call is restricted. When restricting an incoming call from a device other than the mobile device in which the wireless channel failure has occurred, since the “call type” of the call setting information A stored by the mobile device Y is “outgoing”, a new call to the mobile device Y is generated. The “calling number” information included in the “call setting” of the incoming call is compared with the “called number” of the stored call setting information A, and if they do not match, the incoming call is regulated.

FIG. 16 shows an example of a conventional automatic reconnection method, and is a sequence diagram showing a case where a call is set up after a radio channel failure on the calling side is recovered.

In FIG. 16, after a user A dials the other user Y from the mobile device A and the other user Y responds to the incoming call to be in communication, a mobile radio channel failure occurs in the mobile device A, and When the abnormal release of the wireless channel of the device A is performed, the call state transits to the idle state (FIG. 16).
S, q). Further, according to the present invention, a failure monitoring timer set by the user A in advance is started (FIG. 16).
V). If the radio channel failure has not been recovered during activation before the failure monitoring timer expires, then the mobile station A
Even if the failure of the wireless channel is recovered (w in FIG. 16), the recall setting for the partner user Y is not performed.

On the other hand, in FIG. 16, the base station of the mobile communication network 1 in which the location of the mobile unit A is registered is instantaneously disconnected from the synchronization of the wireless channel of the mobile unit A due to abnormal release of the wireless channel of the mobile unit A. When the time is detected for more than the time, the wireless channel failure of the mobile device A is recognized, and a "disconnection" signal including, for example, "during failure of the partner terminal" is transmitted to the mobile device B as the cause display information (l in FIG. 16). The procedure for starting and completing the disconnection recovery procedure of the mobile station B is the same as that of the related art (FIG.
N, p).

In this automatic recall system, when the mobile unit Y is disconnected and released in "other terminal failure" and transits to an empty state (r in FIG. 16), a call restriction timer for which a timer value is set in advance is set. Is activated (z in FIG. 16).

In FIG. 16, before the expiration of the call termination timer of mobile station Y, mobile station A having a radio channel failure
If there is no incoming call from the mobile device Y, the mobile device Y releases the incoming / outgoing call restriction.

Incidentally, the above two conventional automatic reconnection methods are as follows.
Both publications disclose the contents disclosed in JP-A-8-19049.

[0018]

In this conventional automatic reconnection method, when a radio channel failure occurs on the calling side or the called side during a call, the calling and called side mobile units are not connected. , So that outgoing calls and incoming calls must be restricted to the calling and called mobile devices, respectively. There is a problem that a burden is imposed.

[0019]

According to the automatic reconnection method of the present invention, a plurality of base stations for controlling and relaying a plurality of mobile stations in a service area of each of the plurality of base stations are divided into a plurality of base stations. A mobile communication network comprising a plurality of mobile communication switching centers connected to another mobile communication network and connected to another communication network, a mobile station number for the plurality of mobile stations in the mobile communication network connected to the plurality of mobile communication switching offices , A location register storing connection information including a call type, and when the mobile device detects a failure in a communicating wireless line, the mobile device performs a releasing process of the communicating wireless line, and after the releasing process, Upon detecting the restoration of the radio line that has become a failure, the mobile communication switching center issues a position registration request for the current position. When the mobile communication switching center detects a failure of the communicating radio line via the base station, the mobile communication switching center issues the location registration request. When a request for reconnection start after restoration of the failed wireless line is transmitted to the register and a reconnection start response to the reconnection start request is received from the location register, the mobile station communicating with the wireless line Release the line on the device side, start a reconnection waiting timer due to restoration of the wireless line, keep the communication path of the other user with whom the communication was being performed, and confirm that the communication with the other user is being reconnected. When the mobile communication switching center detects a failure recovery of the radio line via the base station, the mobile communication switching center receives a request for reconnection to the radio line from the location register, and performs the reconnection. Character display information indicating that the waiting timer has been stopped, an incoming call process has been performed to the mobile device via the wireless line for the recovery from the failure, and connection has been made to the other user again. Transmitted, also,
When the location register receives a request for reading outgoing or incoming information from the mobile switching center, the location register transmits a response to the read request to the mobile switching center based on the stored connection information. If the outgoing information or incoming information is a line reconnection request and is a reconnect call, delete the stored connection information associated therewith. A request to release the line to be transmitted to the mobile switching center to perform outgoing and incoming calls for the mobile station that is requesting reconnection, and the location register receives the reconnection request from the mobile switching center. A request for reconnection based on the information about the mobile station making the reconnection request sent from the mobile switching center and the stored connection information of the mobile station. It determines whether to allow the storing connection information relating to the mobile station re-connect request, if it permits, transmits a response reconnection initiator to the mobile switching center,
If the permission cannot be granted, a line release request is made. Further, when the location register receives a location registration request for the mobile station from the mobile communication switching center, the location register performs location registration processing, and the mobile station performs the location registration. If the connection information is stored for the device, the connection information is read out,
The mobile communication switching center transmits a reconnection start request to the mobile station of the location registration request.

According to the automatic reconnection method of the present invention, a plurality of base stations for controlling and relaying a plurality of mobile stations within a service area of each of the plurality of base stations are connected to the plurality of mobile stations in a divided manner. In a mobile communication network having a plurality of mobile communication switching centers connected to a communication network, connection information including mobile unit numbers and call types for the plurality of mobile stations connected to the plurality of mobile communication switching centers and in the mobile communication network. During the communication between the first mobile station in the mobile communication network and the other user in the communication network via the first base station and the first mobile switching center. When the first mobile communication switching center detects that the first mobile communication switching center has been disconnected halfway due to a radio line failure or the like, the first mobile communication switching center can permit a reconnection request to the first mobile device to the location register. How And inquire whether a request for a waiting time for a reconnection request can be made. If the reconnection request can be permitted, a call path with the other user is maintained, and a line is provided only to the first mobile device side. And the location register stores the permission of the reconnection request based on the stored mobile station number and call type of the first mobile station, and determines and stores the waiting time for the reconnection request. Next, when the first mobile device detects restoration of the halfway disconnection due to the radio line failure or the like, the first mobile device makes a location registration request to the first mobile communication switching center via the first base station, and Upon receiving the location registration request, the mobile communication switching center transmits the location registration request to the location register. A reconnection request for the first mobile station is transmitted to a first mobile communication switching center, and the first mobile communication switching station waits for a communication path with the other user based on the received reconnection request. From the first call
When the first mobile communication switching center connects to the communication path with the other user when the reconnection request can be permitted, the first mobile communication switching station performs wireless communication with the other user. Announcement means that the connection is disconnected halfway due to a line failure or the like, and a reconnection request is being made, and the first mobile communication switching center recovers the radio line failure or the like and returns to the first mobile station. At the same time, character information that can be displayed to the effect that the wireless circuit failure or the like has been recovered is transmitted to the other user.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram showing an example of a mobile communication system to which an embodiment of the present invention is applied.

In FIG. 1, a mobile communication system to which the present embodiment is applied includes a radio communication area b1 in a mobile communication network M.
, A base station B2 having a wireless area b2 as a wireless area, a base station B3 having a wireless area b3 as a wireless area, and a mobile station S within the wireless area b1.
1, the mobile device S2 in the wireless area b2, and the wireless area b
3 and a mobile switching center C1 connected to the base stations B1 and B2 and to the communication network N outside the mobile communication network M, and a mobile switching center C2 connected to the base station B3 and the mobile switching center C1. And a location register V connected to the mobile communication exchanges C1 and C2 and storing and managing location information, subscriber information, and the like of the mobile station S in the mobile communication network including the mobile stations S1, S2, and S2. It is composed.

FIGS. 2 and 3 are sequence diagrams showing a case where a call is transmitted from the mobile station S (representative of the mobile stations S1, S2 and S3) in the mobile communication system shown in FIG. FIG. 4 is a sequence diagram showing the present embodiment from the detection of a radio line failure of the mobile device S in the mobile communication system shown in FIG. 1 to the recovery from the failure, and FIG. 5 is a radio circuit of the mobile device S in the mobile communication system shown in FIG. It is a figure showing the processing flow after failure detection. FIGS. 6, 7, 8 and 9 show location registers V in the mobile communication system shown in FIG.
The figure showing the processing flow after receiving the outgoing or incoming information read request, the figure showing the processing flow after receiving the reconnection start notification,
It is a figure which shows the processing flow after receiving a location registration request, and the figure which shows the processing flow after receiving a release request.

FIG. 10, FIG. 11, FIG. 12, FIG. 13 and FIG. 14 show the processing flow of the mobile communication switching center C in the mobile communication system shown in FIG. FIG. 3 is a diagram illustrating a processing flow after receiving a response, a diagram illustrating a processing flow after detecting a wireless channel recovery, and a diagram illustrating a processing flow after detecting a timeout of a reconnection waiting timer T.

Next, an automatic reconnection method in the event of a radio line failure according to the present embodiment will be described with reference to FIGS.
This will be described with reference to FIG.

First, the operation when a call is transmitted from the mobile device S1 to the partner user X in the communication device N will be described with reference to FIGS.

When the telephone number of the partner user X is transmitted from the mobile station S1, the mobile communication switching center C receives the telephone number of the partner user X via the base station B1 and sets up a call with the mobile station S1. A transmission information read request is made to the location register V based on the received telephone number. The location register V retrieves information and responds to the request. The mobile switching center C sets up a call to the other party X in the communication network N based on the information of the response, and
, The call setting acceptance is set via the base station B1, and then a call signal is sent to the partner user X, and a ringback tone is sent to the mobile station S1.

When the mobile communication switching center C detects the response of the partner user X via the communication network N, it sends the response of the partner user X to the mobile station S1 via the base station B1.
The communication between the mobile device S1 and the other user X becomes possible by receiving the response confirmation of the first response.

Next, the operation in the case where the mobile device S1 receives an incoming call from the other user X in the communication network N will be described with reference to FIGS.
This will be described with reference to FIG.

First, the mobile communication switching center C1 sets up a call with the other user X by receiving the telephone number from the other user X via the communication network N, and based on the telephone number from the other user X. An incoming information read request is made to the location register V. The location register V retrieves information and responds to the request. Mobile switching center C
1 is the mobile station S via the base station B1 based on the information of the response.
1 is transmitted.

When the mobile communication switching center C1 receives the page response from the mobile station S2 via the base station B1, the mobile station S1 receives the page response.
When a call setting acceptance signal is received from the mobile device S1, a call signal is transmitted to the mobile device S1, and a ring back tone is transmitted to the other user X.

When the mobile communication switching center C1 detects the response of the mobile station S1 via the base station B2, it sends a response to the partner user X via the communication network N, and also sends a response to the mobile station S2. A response confirmation signal is transmitted via the base station B1. As a result, the other party user X can talk with the mobile device S1.

Next, an automatic reconnection method in the event of a radio line failure according to the present embodiment will be described with reference to FIGS.
This will be described with reference to FIG.

As described with reference to FIG. 2, when the mobile device S1 and the other user X are in a talking state, the mobile device S1 moves and the radio reception electric field deteriorates. When the mobile station S1 has a radio link failure with the base station B1, first, as shown in processing 1 of FIG. 5, the mobile station S1 detects the radio link failure (S110) and executes the release processing of the radio link. (S120), and waits for the recovery of the wireless channel.

On the other hand, as shown in process 6 in FIG. 10, the mobile communication switching center C1 disconnects and receives the radio link failure notification reason information via the base station B1 to detect the radio link failure (step 6). (S810), a reconnection start request including the connection information, the mobile station number, and the call type is transmitted to the location register V (S820), and reconnection waiting announcement information is transmitted to the connected partner X (S810). S83
0), only the mobile device S1 side carries the line, and the line is held for the other party user X.

Next, when the location register V receives the reconnection start request from the mobile switching center C1 (S410) as shown in the process 3 in FIG. 7, the location register V uses the mobile unit number and the call type as the received connection information. If it is determined whether or not to perform the reconnection, and the connection is permitted (S420: Yes), the connection information is stored (S430), and the reconnection start including the reconnection waiting time corresponding to the mobile station number and the call type is started. A reconnection start response, which is a response to the request, is transmitted to the mobile switching center C1 (S440). If not permitted (S420:
NO), and transmits a release request to the mobile communication switching center C1 (S
510).

Next, the mobile communication switching center C1 performs processing 7 in FIG.
As shown in (1), when a reconnection start response is received from the location register V (S910), the line on the mobile device S1 side is released (S920), and the waiting time specified by the location register V is activated as a reconnection waiting timer T. (S9
30), and notifies the other user X that the reconnection is in progress with an announcement (S940).

Next, when the mobile station S1 detects that the wireless channel has been restored again, as shown by processing 1 in FIG. 5 (S13).
0), a location registration request is transmitted to the mobile switching center C1 via the base station B1 (S140).

Next, as shown in FIG. 4, the location registration request transmitted from the mobile station S1 is transmitted to the location register V via the base station B1 and the mobile communication exchange C1.

Next, when the location register V receives a location registration request from the mobile communication switching center C1 (S610) as shown in processing 4 of FIG. A location registration acceptance is transmitted to the mobile device S1 via the base station B1 via the base station B1 (S620). If there is connection information stored for reconnection (S630: Yes), the stored connection is received. The information is read (S640), and a reconnection request including the read connection information is transmitted to the mobile communication switching center C1 that has transmitted the reconnection start request (S650). If the connection information is stored, the reconnection request is not transmitted (S630: NO).

Next, when the mobile switching center C1 receives a reconnection request from the location register V (S10
10), and stop the reconnection waiting timer T being started (S10).
20), a process equivalent to a general call (page call) is performed on the mobile device S1 (S11030).

The mobile station S1 that has received the call by this general call (page call) answers the call, reconnects the disconnected call, and transmits display information indicating that the call has been reconnected to the waiting partner X. (S1040).

While waiting for reconnection, that is, while the location register V stores the connection information, for example, as shown in FIG.
, And as shown in FIG. 3, when a call arrives at the mobile station S1 waiting for reconnection, as shown in processing 2 of FIG.
When a request to read outgoing information or incoming information transmitted from No. 1 is received (S210), a response to the information is transmitted (S220), and the mobile station S1 is in a reconnection request and the connection information is stored. Has been performed (S230: Yes)
Is not a reconnection call, that is, the mobile station S in the reconnection request
1 or during a reconnection request
If the call is received (S240: NO), a release request is transmitted to the mobile communication switching center C1 to regulate the outgoing call from the mobile device S1 and the incoming call to the mobile device S1 during the reconnection request (S31).
0).

In the case where the mobile station S1 is requesting reconnection (S230: Yes), if the call is to be reconnected (S2)
40: Yes), delete the stored connection information (S
250). If the mobile device S1 is not requesting a reconnection (S230: NO), the same process as in a normal outgoing / incoming call is performed.

Next, as shown in process 9 in FIG. 13, when the mobile communication switching center C1 receives a disconnection request from the partner user X or a release request from the location register V during a reconnection request of the mobile station S1, (S1110), the mobile switching center C1 transmits a release request to the location register V (S1120). If the reconnection waiting timer T is running (S1130: YES), the reconnection waiting timer T is stopped (S1130: YES). (S1140) Normal line release processing is performed (S11).
50). If the reconnection waiting timer T is not running (S1130: NO), normal line release processing is performed.

Next, the location register V, which has received the line release request from the mobile communication switching center C1, stores (S71)
0), as shown in process 5 of FIG. 9, if the connection information is stored (S720: Yes), the connection information is deleted (S730), and normal line release processing is performed. If the connection information is not stored (S720:
NO), the normal line release processing is performed as it is.

If the mobile station S1 fails to detect the restoration of the radio channel again within the time of the predetermined timer T, the mobile communication switching center C1 restarts as shown in the process 10 of FIG. A timeout of the connection waiting timer T is detected (S1210), a line release request is transmitted to the location register V (S1220), and a line release process is performed (S1230).

The location register V that has received this line release request performs the processing shown in the processing 5 of FIG. 9 described above.

In the present embodiment, after the mobile station S1 in communication detects a radio link failure and performs release processing, instead of detecting radio link restoration and transmitting a location registration request, location registration is performed. It is also possible to transmit a considerable reconnection request determination signal and change the factor for starting reconnection from a location registration request to a reconnection request signal.

Further, even when the handover process fails, it is possible to reconnect a call that has been disconnected once by using the same processing method as that of the present embodiment.

Further, the reconnection waiting timer T may be provided not in the mobile communication switching center C but in the location register V.

[0053]

As described above, according to the present invention, the phenomenon that the radio link between the mobile communication switching center and the mobile station cannot be maintained due to the movement of the mobile station (radio failure, radio channel change processing failure, etc.) has occurred. If the mobile device moves to a place where the mobile device can communicate within the time while keeping the communication route with the other party without disconnecting the By calling the mobile device from the mobile communication network side and responding with the mobile device to perform reconnection, there is an effect that the call can be restored without recalling from the mobile device.

In addition, since relocation permission / non-permission can be managed for each mobile device or each call by the location register, the reconnection can be positioned as a supplementary service. It can be determined for each call. Further, there is an effect that the user having the mobile device can arbitrarily set the reconnection waiting time.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an example of a mobile communication system to which an embodiment of the present invention is applied.

FIG. 2 shows a mobile station S in the mobile communication system shown in FIG.
FIG. 6 is a sequence diagram showing a case where a call is transmitted from a STA.

FIG. 3 shows a mobile station S in the mobile communication system shown in FIG.
FIG. 6 is a sequence diagram showing a case where a call arrives at the terminal.

FIG. 4 shows a mobile station S in the mobile communication system shown in FIG.
FIG. 4 is a sequence diagram showing the present embodiment from the detection of a radio link failure to the restoration of the failure.

FIG. 5 shows a mobile station S in the mobile communication system shown in FIG.
FIG. 7 is a diagram showing a processing flow after the detection of a radio link failure.

6 is a diagram showing a processing flow after receiving a transmission or reception information read request of a location register V in the mobile communication system shown in FIG.

7 is a diagram showing a processing flow after receiving a reconnection start notification of a location register V in the mobile communication system shown in FIG.

8 is a diagram showing a processing flow after receiving a position registration request of a location register V in the mobile communication system shown in FIG.

9 is a diagram showing a processing flow after receiving a release request of a location register V in the mobile communication system shown in FIG.

FIG. 10 is a diagram showing a processing flow after detection of a radio channel failure by mobile communication switching center C in the mobile communication system shown in FIG. 1;

11 is a diagram showing a processing flow after receiving a reconnection start response of the mobile communication switching center C in the mobile communication system shown in FIG. 1.

12 is a diagram showing a processing flow after detecting the restoration of the radio channel of the mobile communication switching center C in the mobile communication system shown in FIG.

13 is a diagram showing a processing flow after receiving a disconnection or release request of the mobile communication switching center C in the mobile communication system shown in FIG.

14 is a diagram showing a processing flow after detecting a timeout of a reconnection waiting timer T of the mobile communication switching center C in the mobile communication system shown in FIG.

FIG. 15 is a sequence diagram showing an example of a conventional automatic reconnection method and showing a case where recall setting is performed after recovery of a radio channel failure on the called side.

FIG. 16 is a sequence diagram showing an example of a conventional automatic reconnection method, and showing a case where a recall is set after a radio channel failure recovery on the calling side.

[Explanation of symbols]

 B, B1, B2, B3 Base station b1, b2, b3 Wireless area C1, C2, C3 Mobile communication switching center M Mobile communication network N Communication network S, S1, S2, S3 Mobile device V Location register X Other user

Claims (9)

[Claims] 1. A plurality of base stations for performing communication control and relay of a plurality of mobile stations in a service area of each base station;
In a mobile communication network comprising a plurality of mobile communication switching stations in which the plurality of base stations are divided and connected and connected to another communication network, the plurality of base stations are connected to the plurality of mobile communication switching stations and the A location register storing connection information including a mobile device number and a call type for a plurality of mobile devices; when the mobile device detects a failure in a wireless channel during communication, the mobile device releases the wireless channel during communication; And performing a location registration request for the current location when the recovery of the failed wireless channel is detected after the release processing. 2. The mobile communication switching center detects a failure of the communicating radio line via the base station, and requests the location register to start reconnection after restoration of the failed radio line. When a reconnection start response to the reconnection start request is received from the location register, the line on the mobile device side communicating with the wireless line is released, and a reconnection waiting timer due to restoration of the wireless line is set. 2. The communication device according to claim 1, wherein the communication device is activated to maintain the communication path of the communicating user, and transmits voice information to the other user indicating that the communication is being reconnected.
Automatic reconnection method described. 3. The mobile switching center receives a request for reconnection to the radio line from the location register when the mobile communication switching center detects failure recovery of the radio line via the base station, and stops the reconnection waiting timer. 3. A process for receiving an incoming call to the mobile device via the wireless line for the recovery from the failure, and transmitting character display information indicating that reconnection has been made to the other user. Automatic reconnection method described. 4. When the location register receives a request for reading outgoing or incoming information from the mobile switching center, the location register transmits a response to the reading request to the mobile switching center based on the stored connection information. And, if the outgoing information or incoming information is a reconnection request in the line reconnection request from the connection information, delete the stored connection information related thereto if it is a reconnection call. 4. The automatic communication system according to claim 1, further comprising: transmitting a line release request related to said incoming call information to said mobile communication switching center to regulate outgoing and incoming calls for said mobile station in a reconnection request. How to reconnect. 5. The mobile station, wherein the location register, when receiving the reconnection request from the mobile switching center, stores information on the mobile station making the reconnection request sent from the mobile switching center. It is determined whether to permit a reconnection request based on the connection information of, if it can be permitted, the connection information on the mobile device of the reconnection request is stored,
5. The automatic reconnection method according to claim 1, further comprising transmitting a reconnection start response to said mobile communication switching center, and transmitting a line release request when said permission cannot be granted. 6. When the location register receives a location registration request for a mobile station from the mobile switching center, the location register performs location registration processing, and connection information is stored for the mobile station performing the location registration. 6. The communication system according to claim 1, wherein said connection information is read out and a reconnection start request is transmitted to said mobile switching center to said mobile station in response to said location registration request. Automatic reconnection method. 7. A plurality of base stations for performing communication control and relay of a plurality of mobile stations in a service area of each of the plurality of base stations, and a plurality of base stations for dividing and connecting the plurality of mobile stations and connecting to other communication networks. In a mobile communication network provided with a mobile communication switching center, a location register connected to the plurality of mobile communication switching centers and storing connection information including mobile unit numbers and call types for the plurality of mobile stations in the mobile communication network. And a first mobile station in the mobile communication network is disconnected halfway due to a radio line failure or the like while communicating with the other user in the communication network via the first base station and the first mobile communication switching center. When the first mobile communication switching center detects that the communication has been performed, the first mobile communication switching center stores the first mobile communication switching center in the location register.
Whether the reconnection request for the mobile device can be permitted, and whether the waiting time for the reconnection request can be requested, and if the reconnection request can be permitted, hold the communication path with the other user, The line is released only to the first mobile station, and the location register stores the permission of the reconnection request based on the stored mobile station number and call type of the first mobile station. The waiting time for the reconnection request is determined and stored. Next, when the first mobile station detects the restoration of the halfway disconnection due to the radio line failure or the like, the first mobile station transmits the first mobile station via the first base station. The first mobile communication switching center sends a location registration request to the location register when the first mobile communication switching center receives the location registration request, and the location register forwards the received location registration request. A reconnection request for the first mobile station is transmitted to the first mobile communication switching center assuming that the first mobile station is a radio channel restoration factor, and the first mobile communication switching station receives the reconnection request. An automatic reproduction connection method, wherein a process equivalent to an incoming call process to the first mobile device is performed from a call waiting on a communication path with the other user based on a request. 8. When the first mobile communication switching center connects a communication path with the other user when the reconnection request can be permitted, the first mobile communication switching center is disconnected halfway due to a radio line failure or the like, and 8. The self-reconnection method according to claim 7, wherein a notification that a connection request is being made is notified by an announcement unit. 9. The first mobile communication switching center recovers the radio link failure and performs processing equivalent to the incoming call processing to the first mobile station, and at the same time, gives the other user the radio link failure. 9. The automatic reconnection method according to claim 7, wherein the transmitting unit transmits character information that can be displayed to indicate the restoration.