JPH0766872A - Abnormal interruption relief method - Google Patents

Abstract

PURPOSE:To send automatically a message not delivered to a destination when the line is abnormally interrupted while a subscriber is busy by sending guide information to a 1st subscriber from a 1st guide information storage section when a 1st control section detects the entry of fault interrupt information from a base station. CONSTITUTION:A telephone number of a busy subscriber is stored in a memory 37 during busy state of 1st and 2nd subscribers and when talking is normally finished, the stored telephone number is immediately deleted. Suppose that a base station and a mobile station detect it that the reception level is decreased to a setting level or below because the mobile station is moved to the outside of the service area, for example, while the 2nd subscriber of the mobile station is busy. Thus, the mobile station displays the state of outside of zone to its own display section and the base station sends a detection signal to a controller 36 of an exchange station and interrupt a talking line of the exchange station. The controller 36 informs it to the controller 35 that, the controller 36 receives a detection signal from the base station to start an information storage section 42. The storage section 42 is a talkie memory and stores occurrence of a fault interruption to the 1st subscriber and a message not delivered to the 1st memory to a memory 43 and informs it to the 1st subscriber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormal disconnection rescue method used in, for example, a mobile communication system.

In the remarkable information-oriented society of recent years, it is required to be able to contact anytime, anywhere and with anyone. Therefore, it is a mobile communication system that can be carried and can communicate with each other via a general subscriber telephone network (
Demand for cars / cell phones, system cordless phones, etc.) is growing rapidly.

However, it is often found that the other party's mobile station moves out of the service area during a call or the battery voltage drops below a specified value, so that the call is suddenly interrupted. . Also, although the user moved to a new service area, there are no free channels, so the call may be cut off.

Therefore, subscribers of the general subscriber telephone network (that is,
From the person who can continue normal call) to the subscriber of the mobile network (that is, the person who cannot continue normal call) and from the person who cannot continue normal call to the person who can immediately effect normal call. It is necessary to be able to send it automatically as a message.

[0005]

2. Description of the Related Art FIG. 6 is a block diagram of a main part of a mobile communication system. Hereinafter, a subscriber of the mobile station 13 (hereinafter referred to as a second subscriber) is a subscriber (hereinafter referred to as a first subscriber) connected to the general telephone network.
A general connection procedure will be described as a call to a subscriber.

First, when the second subscriber makes a call from the mobile station 13, the calling signal and the subscriber number of the mobile station are sent to the exchange 37 via the radio base station 21. The exchange determines the radio zone in which the mobile station is located, selects a free channel and notifies the mobile station.

The base station has one wireless zone among a plurality of wireless zones formed by subdividing the service area, communicates with a plurality of mobile stations in this wireless zone, and connects with a switching center. Has been done.

Then, the second subscriber sends the dial signal of the first subscriber to the exchange using the notified communication channel. The switching center checks the subscriber information of the mobile station and, if it is possible to make a call, connects the line to the first subscriber like the general subscriber telephone network, and connects between the first subscriber and the second subscriber. The call is started.

However, because the mobile station moves out of the service area or the battery voltage drops below a specified value, the base station and the mobile station keep their reception level for a predetermined time.
When it detects that the value is continuously below the set value, the former determines that communication is impossible, sends abnormal disconnection information to the exchange through a control line (not shown), and (Not shown) is turned off, and the latter displays, for example, the out-of-service area indicating that the vehicle has gone out of the service area.

As a result, the call is released regardless of the intentions of the first and second subscribers, and the switching center for the first subscriber and the terminal of the own station for the second subscriber. The busy tone is sent from.

[0011]

Therefore, even if the caller can recognize that the call becomes impossible by listening to the busy tone, the caller ends the call regardless of the intention of the caller. There was a problem that it failed to convey the message.

It is an object of the present invention to enable a message to be automatically sent as a message to the other subscriber when the first and second subscribers are abnormally disconnected during a call. And

[0013]

FIG. 1 is a block diagram showing the principle of the first aspect of the present invention. In the figure, 1 is a mobile station, 2 is a base station connected to the mobile station by a wireless line, 3 is an exchange station connected to the base station and the general subscriber telephone network, 43 is a first memory section, and 42 is an abnormal disconnection. Is generated and a guide information storage unit 41 stores guide information indicating that a message to be sent to the second subscriber can be stored in the first memory unit, and 41 controls operations of necessary units. This is the first control unit.

Further, 53 is a second memory section, 52 is a second guidance in which guidance information indicating that an abnormal disconnection has occurred and a message to the first subscriber can be stored in the second memory section is stored. The information storage unit 51 is a second control unit for controlling the operation of each necessary unit.

According to a first aspect of the present invention, when the first control unit detects that abnormal disconnection information has been input, it sends guidance information from the first guidance information storage unit to the first subscriber, A message for the second subscriber is stored in the first memory unit, and a response request signal is sent to the mobile station via the base station at a predetermined cycle, but when the response signal from the mobile station is detected, 1
The corresponding message is read out from the memory of No. 1 and sent to the mobile station, and the first subscriber is notified that the message has been sent.

In a second aspect of the present invention, when the second control section detects that the abnormal disconnection information is displayed, the second guide information storage section sends the guide information to the second subscriber. , The message to the first subscriber is stored in the second memory unit, but when it is detected that the line state is continuously restored to the set value or more for a predetermined time, the corresponding message is sent from the second memory. The data is read out and sent to the base station, and at the same time, the second subscriber is notified that the message has been transmitted.

[0017]

According to the first aspect of the present invention, the exchange is provided with the first memory section 43.
And a first information storing guide information indicating that an abnormal disconnection occurrence and a message to the second subscriber can be stored in the first memory unit.
And a first control unit.

When the first control unit detects that the abnormal disconnection information is input from the base station, the first control unit sends the guidance information from the first guidance information storage unit to the first subscriber, Two
Message to the subscriber is stored in the first memory, and a response request signal is sent to the mobile station at a predetermined cycle.

When the response signal from the mobile station is detected, the corresponding message is automatically sent from the first memory to the mobile station via the base station, and the message is sent to the first subscriber. Was notified.

According to a second aspect of the present invention, the mobile station stores a second memory section 53 and guidance information indicating that an abnormal disconnection and a message to the first subscriber can be stored in the second memory section. A second guidance information storage unit 52 and a second control unit 51 are provided.

Then, when the second control unit detects that the abnormal disconnection information is displayed, the second control unit sends the guide information from the second guide information storage unit to the second subscriber, and the second memory. Let the department store a message to the first subscriber. Then, when it is detected that the line status is continuously the set value or more for a predetermined time, the corresponding message is read from the second memory and sent to the first subscriber through the base station and the switching center. At the same time, the second subscriber is notified that the message has been transmitted.

As a result, it is possible to avoid failing to convey important messages to the first and second subscribers. Also, since the second and first subscribers are notified that the transmission has been completed, the sender subscriber can know that the message has been transmitted.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a block diagram of the essential parts of the first embodiment of the present invention (switching station), FIG. 3 is a schematic view of the essential parts of the second embodiment of the present invention (mobile station), and FIG. 2 is an operation explanatory diagram of FIG. 2, and FIG. 5 is an operation explanatory diagram of FIG.

Here, although the same reference numerals denote the same objects throughout the drawings, 31 and 33 in FIG. 2 are interface parts (for example, bidirectional trunk) with the base station, and 34 is a station consisting of an incoming trunk and an outgoing trunk. A line trunk, 32 is a communication path, 35 is a central control unit for controlling necessary operations of various parts, and 36 is a control line control unit.

Reference numeral 11 in FIG. 3 denotes a wireless unit, 13 a keyboard, a display unit, a CPU, etc., a control unit for controlling the operation of each necessary unit, and 12 an interface between the wireless unit and the control unit. The interface part is a part that has been conventionally configured.

Now, the operation of FIG. 2 will be described with reference to FIG. 4. Since the present invention relates to an abnormal disconnection during a call, the first and second subscribers are in a call with a line configured. And Further, the telephone number of the subscriber who is making a call is stored in the memory 37, but when the call is normally completed, the stored telephone number is immediately deleted. However, it is assumed that the telephone number for which a message is left due to abnormal disconnection is flagged, but the telephone number and flag are deleted after the message is transmitted.

First, the second subscriber of the mobile station and the second subscriber connected to the general telephone subscription network were in a call, but the mobile station moved out of the service area. It is assumed that the station and the mobile station detect that the reception level continuously drops below the set value for a predetermined time.

As a result, the mobile station displays the out-of-range area on its own display portion (not shown), and the base station sends a detection signal to the control line controller 36 of the exchange through the control line. Disconnect the call line from the exchange.

Since the control circuit control device 36 notifies the control device 35 that the detection signal from the base station has been received, the central control device 35 does not send a busy tone and activates the guide information storage section 42. To do. The guidance information storage unit 42 is a talkie, and when an abnormal disconnection occurs, a message indicating the abnormal disconnection to the first subscriber (who is able to continue a normal call) and the failure to communicate to the first memory is given as a message. I will guide you to leave. Therefore, the first subscriber stores the unsuccessful message in the first memory 43 as a message (see FIG. 4).

The first control section 41 also generates a response request signal in a predetermined format. This response request signal is sent to the mobile station with the flagged telephone number in the memory 37.
It transmits at a predetermined cycle via the base station.

On the other hand, when the mobile station returns to the service area again, normal reception is possible. When the mobile station receives a response request signal from the base station, it sends a response signal to the base station. To the exchange. When the first control unit 41 of the exchange detects the response signal, it reads the corresponding message from the first memory and transmits it to the mobile station via the base station, and at the same time, the first subscriber, which is the source of the message After notifying the person that the message has been transmitted by voice or characters, the message and the telephone number stored in the first memory 43 and the memory 37 are erased (see FIG. 4-).

Next, the operation of FIG. 3 will be described with reference to FIG. The telephone number of the calling subscriber is stored in a predetermined area of the second memory 53, but the telephone number of the calling subscriber stored in the second memory 53 is deleted when the call ends normally. However, for a telephone number for which a message is left due to abnormal disconnection, for example, a flag is set, but the corresponding telephone number and flag are deleted after the message is transmitted.

Since the mobile station radio section 11 during a call sends the reception level to the second control section 51 through the interface, the second control section 51 continuously sets the reception level for a predetermined time. When the following is detected, the display area (not shown) of its own station displays, for example, "out of service area" and drives the guidance information storage unit 52. The guide information storage unit 52 guides the second subscriber to leave an error disconnection message and a missed message in the second memory 53.

As a result, the second subscriber can use the second memory 53 as a message to inform the first subscriber of the missed message.
To store. When the second control unit 51 detects that the reception level from the wireless unit 11 is continuously above the set value for a predetermined time, the second control unit 51 stores the telephone number and the message of the first subscriber from the second memory. Send to the station. Therefore, the base station sends a message to the first subscriber and sends a message sent to the first subscriber.

That is, even if an abnormal disconnection occurs during a call, it is possible to leave a message to the first and second subscribers, and it is possible to avoid failing to convey an important message. Also, since the second and first subscribers are notified that the transmission has been completed, the sender subscriber can know that the message has been transmitted.

[0036]

As described in detail above, according to the present invention, when the first and second subscribers are abnormally disconnected during a call,
This has the effect of automatically sending a message that could not be communicated to the other subscriber as a message.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of a first present invention.

FIG. 2 is a configuration diagram of a main part of the first embodiment of the present invention (exchange station).
Is.

FIG. 3 is a block diagram of the essential parts of a second embodiment of the present invention (mobile station).
Is.

FIG. 4 is an operation explanatory diagram of FIG. 2;

5 is an operation explanatory diagram of FIG. 3;

FIG. 6 is a configuration diagram of a main part of a mobile communication system.

[Explanation of symbols]

1 Mobile Station 2 Radio Base Station 3 Switching Station 41 First Control Unit 42 First Guidance Information Storage Unit 43 First Memory Unit 51 Second Control Unit 52 Second Guidance Information Storage Unit 53 Second Memory Unit

Claims (2)

[Claims] 1. A radio base station (2), a mobile station (1) which is connected to the radio base station by a radio line, checks the line state and sends it to the base station, the base station and a general subscriber telephone network. And a switching center (3) connected to the first subscriber and the second subscriber of the mobile station are communicating with each other via the switching center and the base station, and the base station and the mobile station are in a line state. When the base station detects that it has deteriorated below the set value continuously for a predetermined time, the base station sends abnormal disconnection information to the exchange to disconnect the communication connection with the exchange, and the mobile station outputs the abnormal disconnection. In the mobile communication system according to the present invention, the exchange stores the first memory unit (43) and guidance information indicating that an abnormal disconnection and a message to the second subscriber can be stored in the first memory unit. The first guide information storage unit (42) and the first control unit (4) for controlling the operation of each necessary unit.
1) and, when the first control unit detects that the abnormal disconnection information is input, the first control unit stores the guide information from the first guide information storage unit as the first guide information.
To store a message to the second subscriber in the first memory unit and to send a response request signal to the mobile station via the base station at a predetermined cycle. When a response signal from the mobile station is detected, the corresponding message is read from the first memory and sent to the mobile station, and at the same time, the first subscriber is notified of the message transmission. A method for relieving abnormal cutting characterized by: 2. In the mobile communication system, the mobile station can store a second memory section (53) and an abnormal disconnection occurrence and a message to the first subscriber in the second memory section. Second guide information storage section (52) in which the guide information of the above is stored, and a second control section (5) for controlling the operation of each necessary section.
1) is provided, the second control unit, when detecting that the abnormal disconnection information is displayed, sends the guide information from the second guide information storage unit to the second subscriber, A message to the first subscriber is stored in the second memory unit, and when it is detected that the line state is continuously restored to a set value or more for a predetermined time, the corresponding message is sent from the second memory. Is read out and transmitted to the base station, and the second subscriber is notified of the message transmission completion.