JPH0819049A - Automatic redial system - Google Patents

Abstract

PURPOSE:To provide the automatic redial system in which a call interrupted by radio interference or the like is automatically reconnected. CONSTITUTION:A setup information storage means stores setup information relating to an opposite user at setup (t), a fault monitor means monitors recovery from a fault (w), and an automatic re-setup means uses setup information stored in the setup information storage means to set a call automatically (x). Furthermore, an incoming call outgoing call restrict means uses an incoming call outgoing call restriction timer (z) to restrict an outgoing call to other stations than a mobile station having a fault and an incoming call from other stations than the mobile station having a fault for a prescribed time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a system for automatically resetting a call after recovery from a fault in a digital mobile communication system.

[0002]

2. Description of the Related Art In recent years, standardization of digital mobile communication systems has been promoted in various regions of the world, and development for the realization of commercial services thereof has been advanced. In Japan as well, the Radio Frequency System Development Center (RCR) is promoting domestic standardization, and in April 1991, JDC (Japan Digital Cell)
ular) The first edition (RCR STD-27A) of the digital type automobile telephone system standard and the second edition (RCR STD-27B) were published in December of the same year to complete the standardization. This is expected to accelerate the practical application of digital mobile communication systems in Japan.

In a digital car telephone system,
In consideration of the connection with ISDN, the standardization of the air interface based on the OSI layered model was promoted. The layer 1 standard of the RCR standard 27 is radio frequency,
It has a function of guaranteeing transmission of bit strings by managing physical conditions such as a wireless system such as a modulation system and a wireless channel configuration. The layer 2 standard has multiple functions of reliably transmitting layer 3 information by using the bit transmission function of layer 1, and in particular, the divisional retransmission transfer method is applied as an error retransmission function in consideration of wireless transmission characteristics. Has been done. Also,
The Layer 3 standard has a function of guaranteeing communication between a mobile station and a mobile communication network and realizes a control function necessary for a circuit switching service or a packet switching service.
Of the above and CCITT recommendations. Layer 3 functions include a radio management (RT) function that controls the setting, maintenance, and switching of radio channels, a mobility management (MM) function that performs location registration and authentication, and call control (CC) such as calling and disconnecting. ) It is classified into three functions. Although these three functions are independent of each other, the control signals for these layer 3 functions are piggybacked on the same layer 2 frame and transmitted to improve control signal transmission efficiency and connection delay time. There is.

Radio channels are roughly classified into information channels (TCH: Traffic Channel) for transferring user information and control channels (CCH: Control Channel). C
In order to transfer information for registering a position from a mobile communication network to a mobile station and information on the channel structure in the CH in the broadcast type, a broadcast channel (BCCH: Broadcast Control Cha
call control signals for call setup, disconnection recovery, etc.
A common control channel (CCCH) is used to transfer a signal for setting a CH. Also, for signal transfer during communication such as channel switching during communication, an accompanying control channel (ACC
H: Associated Control Channel) is used, and a user packet channel (UPCH: User Packet Channel) is used when user information is transferred in a random access form.

A three-channel multiplex TDMA system is adopted as a wireless channel access system. The physical channels to be multiplexed are a communication physical channel assigned to each user and a control channel commonly used by a plurality of users. There is a physical channel. The TCH and ACCH are assigned to the communication physical channel, and the BCCH, CCCH, and UPCH of the CCH are assigned to the control physical channel.

Mobile device A whose location is registered in the mobile communication network
FIG. 12 shows a sequence diagram of a call control signal in the case where the mobile device B makes a call from the mobile device B, the mobile device B responds and the communication is established, and then the mobile device A normally disconnects and releases the call. Further, the structure of each call control signal in this sequence diagram is shown in FIG.
~ (H). Hereinafter, a call originating / receiving procedure and a disconnection recovery procedure in a normal case will be described with reference to these drawings.

In FIG. 12, when the user A dials from the mobile device A to the mobile device B of the other user B, the mobile device A uses the subscriber number of the user A as the calling number information and the other user B as the destination number information. FIG. 13 includes information such as subscriber number and necessary transfer capability information for other call connections.
A "call setting" signal as shown in (a) is generated and transmitted to the position-registered mobile communication network 1 (Fig. 12a). The mobile communication network 1 that has received this "call setup" signal
An incoming call is made by analyzing the called number contained in the signal and transmitting this "call setting" signal to the mobile unit B (Fig. 12b), and to the mobile unit A as shown in Fig. 13 (b). A "call setting acceptance" signal is transmitted (Fig. 12c). When mobile unit B receives the "call setup" signal from the mobile communication network, FIG.
The "call" signal as shown in (c) is sent back to the mobile device A via the mobile communication network, and at the same time, the other user B hears the ringing tone (FIGS. 12d and 12e). Upon receiving the "call setting acceptance" signal and the "call" signal from the mobile communication network, the mobile device A causes the user A to listen to a ring back tone (RBT). When the other party user B, who was listening to the ringing tone, answers the incoming call by going off-hook, the mobile device B is shown in FIG.
A "response" signal as shown in Fig. 12 is transmitted to the mobile device A via the mobile communication network (Fig. 12f). When the mobile device A receives the "response" signal from the mobile communication network (Fig. 12g), Fig. 13 (e)
By sending a "response confirmation" signal to the mobile communication network (Fig. 12i) and receiving a "response confirmation" signal from the mobile communication network (Fig. 12h), mobile device A
The mobile station B is now communicating (FIG. 12j).

After being in communication according to the procedure described above,
When the user A goes off-hook, the mobile device A generates a "disconnection" signal including "normal disconnection" as the reason display information as shown in FIG. 13 (f), and sends it to the mobile communication network to perform the disconnection recovery procedure. Start (Fig. 12k). The mobile device B that has received this “disconnect” signal via the mobile communication network 1
The user B hears the busy tone (BT) as the sound to be disconnected (FIG. 12l). On the other hand, when the user B goes on-hook, the mobile device B “releases” as shown in FIG.
A signal is sent to the mobile communication network to stop BT (Fig. 12
n). When mobile unit A which has transmitted the “disconnect” signal receives the “release” signal from the mobile communication network (FIG. 12m), FIG.
By sending out a "release complete" signal as shown in (h) to the mobile communication network (Fig. 12o), it becomes empty (Fig. 12).
q). Further, the mobile device B which has transmitted the "release" signal becomes the idle state (Fig. 12r) by receiving the "release complete" signal from the mobile communication network (Fig. 12p). When the call state becomes empty, the wireless channel is disconnected and released from the mobile communication network.

Next, after the mobile station A whose location is registered in the mobile communication network receives an incoming call from the mobile station B and the user A responds to the call and establishes communication, the mobile station A normally disconnects the call. A sequence diagram of the call control signal when released is shown in FIG.

In FIG. 14, the directions of the “call setting”, “call”, “response”, and “response confirmation” signals from “calling” to “in communication” in FIG. 12 are reversed. . Other than that, the sequence diagram shown in FIG. 14 is the same as the sequence diagram shown in FIG. Also, the configuration of each call control signal in the sequence diagram shown in FIG.
It is the same as the configuration shown in 3 (a) to 3 (h).

Next, after the mobile station A registered in the mobile communication network makes a call to the mobile station B and the mobile station B responds and the mobile station B is in communication, the mobile station A side cuts off the reception radio wave. FIG. 15 shows a sequence diagram of call control signals when a failure occurs in the wireless channel. 16A to 16H show the structure of each call control signal in the sequence diagram shown in FIG. The disconnection recovery procedure when a radio channel failure occurs will be described below with reference to these figures.

In the sequence diagram shown in FIG. 15, the procedure from "calling" to "in communication" (FIGS. 15a to 15j)
Is the procedure in the sequence shown in FIG.
The same as j). The configuration of each call control signal (FIGS. 16A to 16E) related to these procedures is also the same as the configuration of each call control signal shown in FIG. 13 (FIGS. 13A to 13E). is there.

Even if the mobile station A, which is in communication as described above, enters a tunnel or the like, the reception level of the radio channel drops sharply, and the synchronization of layer 1 is lost, the reception level recovers within a predetermined time, When the layer 1 can be resynchronized, it is regarded as a momentary interruption and the previous state is retained. However, when the mobile device A is brought into the underground or the like, and the synchronization of the layer 1 is lost and a predetermined time (a time that can be regarded as a momentary interruption) or more elapses, it is recognized as a radio channel failure as shown in FIG. , Layer 3, Layer 2, and Layer 1 (radio channel) internal resources are released (FIG. 15s). When the base station of the mobile communication network in which the location of the mobile device A is registered detects the loss of synchronization of the radio channel of the mobile device A for more than the momentary interruption time due to the abnormal release of the radio channel of the mobile device A, the radio channel of the mobile device A is detected. Recognize the obstacle,
For example, the disconnection recovery procedure of the mobile device B (“release , "Release completion") and start (Fig. 15
n, p, FIG. 16 (g), (h)).

Therefore, when the mobile station A enters a long tunnel or the like and the reception level of the wireless channel is restored after a lapse of time more than that which can be regarded as a momentary interruption, the user A calls the user B again. Alternatively, the user B must wait for an incoming call. Next, the mobile station A, which is registered in the mobile communication network, makes a call to the mobile station B, and before the mobile station B responds, a radio channel failure occurs on the mobile station A side due to a reception radio wave interruption. FIG. 17 shows a sequence diagram of the call control signal in the case.

In the sequence diagram shown in FIG. 17, the mobile station A and the mobile station B are in communication with each other before the mobile station A and the mobile station B reach "in communication".
The procedure is the same as that in the sequence shown in FIG. 15 (FIGS. 15a to 15e, s to p), except that a radio channel failure occurs on the side due to interruption of received radio waves (FIG. 17s). The configuration of each call control signal relating to these procedures is also the configuration of each call control signal shown in FIG. 16 (FIGS. 16A to 16D,
It is the same as (f) to (h).

Next, after the mobile station A whose position is registered in the mobile communication network receives an incoming call from the mobile station B and the user A responds to the call and makes communication, the mobile station A disconnects the reception radio wave. FIG. 18 shows a sequence diagram of a call control signal when a failure occurs in a wireless channel.

In this case, the procedure (FIGS. 18a-j) until the mobile station A and the mobile station B reach "in communication" is the same as the procedure (FIGS. 14a-j) in the sequence shown in FIG. Also, regarding the procedure (FIG. 18s to p) after the failure of the wireless channel due to the reception radio wave interruption on the mobile device A side, the procedure in the sequence shown in FIG.
5s-p).

Next, before the mobile station A registered in the mobile communication network receives an incoming call from the mobile station B and the user A responds, the mobile station A side receives a radio wave interruption and a radio channel failure occurs. FIG. 19 shows a sequence diagram of the call control signal when the call occurs.

In this case, the procedure (FIGS. 19a to e) in the sequence shown in FIG. 19 is the same as the procedure (FIGs. 18a to 18e) in the sequence shown in FIG. For the procedure (FIGS. 19s to 19p) after the wireless channel failure occurs in FIG.
This is the same as the procedure (FIGS. 17s to 17p) in the sequence shown in FIG.

When the user A as shown in FIG. 18 and FIG. 19 receives the incoming call from the user B, the user A waits for the incoming call from the user B or calls the user B. I have to call again.

[0021]

As described above, according to the conventional method, when the user mounts the mobile unit in a vehicle and enters a long tunnel or the like while moving, the reception level of the radio channel of the mobile unit is lowered and the predetermined level is reached. Even if the reception level recovers after a lapse of more time than that, the wireless channel is recognized to have occurred, resources are internally released in the mobile device, and the call state before entering the tunnel is cleared. Therefore, there is an inconvenience that the user has to manually call again when the user wants to return to the previous state, for example, the state during a call or the state during a call.

Further, if the communication partner starts a call with another communication partner before the user re-calls, the other party remains in the call even if the call is re-established, and the communication is restored to the previous state and the communication is continued. There was a problem such as inconvenience that I could not do it.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an automatic call-recall system capable of efficiently reconnecting a call interrupted by a radio failure or the like.

[0024]

In order to solve such a problem, the invention according to claim 1 is a communication terminal, and in the communication terminal, call setting information storing means for storing call setting information relating to the other user, and the communication terminal. When a communication failure occurs while the call is being set up or in communication, the failure monitoring means monitors the recovery of the communication failure, and when the communication failure is recovered, And automatic re-call setting means for automatically resetting a call using the call setting information stored by the call setting information storage means.

According to a second aspect of the present invention, in a mobile station whose location is registered in the mobile communication network, call setting information storage means for storing call setting information relating to the other user at the time of call setting,
When a failure of the wireless channel occurs while the call is being set up or in communication with the failure monitoring means for monitoring the failure of the wireless channel used by the mobile station, the failure monitoring means monitors the failure recovery of the wireless channel. An automatic re-call setting means for automatically resetting a call using the call setting information stored by the call setting information storage means when the failure of the wireless channel is recovered.

According to a third aspect of the present invention, in a mobile station whose location is registered in the mobile communication network, call setting information storage means for storing call setting information relating to the other user at the time of call setting,
Fault monitoring means for monitoring the fault of the radio channel used by the mobile station, and when a fault of the radio channel occurs during call setup or communication, a fault monitoring timer is activated and the fault monitoring timer expires. When the failure monitoring means detects that the failure of the wireless channel has been recovered, the call is automatically reset immediately using the call setting information stored by the call setting information storage means. And an automatic re-call setting unit that does not reset the call when the failure monitoring timer expires before the failure of the wireless channel is recovered.

According to a fourth aspect of the present invention, in a mobile station whose location is registered in a mobile communication network, at the time of call setting, if the mobile station is a calling side, at least the subscriber number of the other user is used as the other user. Stored as call setup information related to
When the mobile station is the called side, at least a call setting information storage unit that stores the calling number information notified from the other user as the call setting information related to the other user, and a radio channel used by the mobile station. When a failure occurs in the wireless channel while the call is being set up or in communication with the failure monitoring means for monitoring the failure, the failure monitoring means monitors the failure recovery of the wireless channel and recovers the failure of the wireless channel. An automatic re-call setting means for automatically re-setting a call using the call setting information stored by the call setting information storage means.

According to a fifth aspect of the present invention, in a mobile station whose position is registered in the mobile communication network, call setting information storage means for storing call setting information relating to the other user at the time of call setting,
Fault monitoring for monitoring a failure of the radio channel used by the mobile station and determining that a failure of the radio channel has occurred when a radio state in which the procedure related to the management of the radio resources of the mobile station is not correctly performed is detected. Means, when a failure of a wireless channel occurs during call setup or during communication, the failure monitoring means monitors failure recovery of the wireless channel, and when the failure of the wireless channel is recovered, the call setup information And automatic re-call setting means for automatically resetting a call using the call setting information stored by the storage means.

According to a sixth aspect of the present invention, in a mobile station whose location is registered in the mobile communication network, call setting information storage means for storing call setting information relating to the other user at the time of call setting,
Fault monitoring means for monitoring a fault of a radio channel used by the mobile station, and a partner user of the mobile station notifies the radio channel fault of the mobile station from a communication network to which a communication terminal of the partner user is connected. When the disconnection is released by receiving the disconnection recovery signal including the reason display information, the transmission to the mobile station other than the mobile station in which the radio channel failure has occurred and / or the call reception from the mobile station other than the mobile station in which the radio channel failure has occurred When a failure occurs in the wireless channel during call setup or communication, the failure monitoring means monitors the recovery of the failure of the wireless channel, and the failure of the wireless channel is detected. And automatic re-call setting means for automatically resetting the call using the call setting information stored by the call setting information storage means when recovered. .

[0030]

In the present invention, the call setting information storage means stores the call setting information relating to the other user at the time of call setting, the failure monitoring means monitors the failure recovery, and the automatic recall setting means stores in the call setting information storage means. Automatically perform call re-establishment using the stored call setup information.

As described above, the call interrupted due to the radio failure or the like is automatically reconnected, so that the user does not need to manually perform the reconnection operation.

Further, the outgoing / incoming call restricting means restricts outgoing calls to other than the faulty mobile station and incoming calls from other than the faulty mobile station for a predetermined time.

Therefore, it is possible to perform efficient communication without being disturbed by a call from a third party between the occurrence of the failure and the recovery.

[0034]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a network configuration diagram when the automatic recalling method according to an embodiment of the present invention is applied to a mobile device and a mobile communication network.

In FIG. 1, it is assumed that the mobile device 3a and the mobile device 3b are position-registered with the base station 2a in the mobile communication network 1 and can perform mutual communication with the base station 2a via a wireless line. The mobile device 3a and the mobile device 3b are exchange-connected by the exchange station 2b which is connected to the base station 2a by a wire via the base station 2a.

FIG. 2 is a schematic configuration diagram of the mobile unit 3a and the mobile unit 3b in FIG.

In FIG. 2, a microprocessor unit (MPU) 5 selects a control signal for wireless management of the mobile unit 3, that is, selects a wireless zone, sets and maintains a wireless line,
Control signals for realizing functions such as switching and disconnection, control signals for mobility management, that is, control signals for realizing functions such as location registration and authentication, and control signals for line call connection, that is, call setting , Various call control signals for realizing functions such as maintenance and call disconnection are exchanged with the base station 2 of the mobile communication network 1 via the control channel (CCH) of the wireless line interface 4, and further, the various control signals It controls the entire system required for voice communication by analyzing the contents of. These controls are performed by the software stored in the read only memory (ROM) 7 connected to the MPU 5.

When making a call, the user dials the subscriber number of the other user from the keyboard 8 and the MPU 5 inputs it to generate a "call setting" signal for making a call. The generated outgoing “call setting” signal is transmitted to the base station 2 by the MPU 5 via the CCH of the wireless line interface 4. The wireless line interface 4 is an RCR standard 2
According to the radio channel structure defined in the Layer 1 standard of 7B, a control channel (CCH) and an information channel (TC
H) and H) are multiplexed and separated on a control physical channel and a communication physical channel having a transmission capacity of 11.2 Kbps, and the transmission control function defined by the layer 2 standard of RCR standard 27B is transmitted on the CCH. Has been realized in the MPU
5 controls the transmission of call control signals with the base station 2 via the CCH. The TCH multiplexed / demultiplexed by the wireless line interface 4 is, for example, a voice codec 6
Connected to. The voice communication channel system is composed of the handset 9 and the codec 6, and the analog voice signal from the handset 9 is VSELP in the voice codec 6.
It is converted into a 11.2 Kbps digital signal by the encoding system and is connected to the voice communication system of the partner terminal via the TCH. In the present invention, each mobile device can be registered in advance.

For example, the monitoring time (a time longer than that which can be regarded as a momentary interruption) when the user A and the user B have a wireless channel failure in advance before making or receiving a call, or the abnormal disconnection because the partner mobile station has a wireless channel failure. When a call is sent to the other mobile device, the time limit for sending to the other mobile device, whether to re-call automatically when the wireless channel failure is recovered, or the other mobile device has an abnormal wireless channel failure When the call is disconnected, specify whether or not to restrict outgoing calls to mobile stations other than those that have a wireless channel failure and to restrict incoming calls from mobile stations that do not have a wireless channel failure, by registering with each mobile station using a prescribed method. deep.

Here, as one embodiment, the radio channel failure monitoring time, the outgoing call restriction time, and the incoming call restriction time (same as the outgoing call restriction time) are set to specific values, respectively, and automatic re-establishment at the time of recovery from the wireless channel failure is performed. The case of performing call setting, registration of outgoing call to parties other than the wireless channel failure partner, and registration of incoming call restrictions from parties other than the wireless channel failure partner are shown.

Next, the operation will be described.

First, the user A dials the partner user B from the mobile device A, and the partner user B responds to the incoming call so that the user A is in communication. FIG. 3 shows a sequence diagram of a call control signal when the mobile station A resets the mobile station B after the radio channel failure is recovered by the automatic recall setup method of FIG. In FIG. 3, when the user A finishes dialing the mobile device B in the mobile device A, a "call setting" signal is sent to the mobile communication network (FIG. 3a). R for this "call setup" signal
Information of the format shown in FIG. 13 (a) defined by the CR standard 27B is included, and the "calling number" information is "source (mobile device A) subscriber number" and "callee number". As in the conventional case, the "callee (mobile unit B) subscriber number" is set in the information.

In the present invention, when the "call setting" signal is generated, as shown in FIG. 4, "transfer capability" information, "calling number" information, "callee number" information, and "calling / calling type" information. Information and the like are stored as call setup information A for call setup (FIGS. 4a and 3t).

When the "call setting" signal transmitted from the mobile station A is received by the mobile communication network 1, the radio line of the mobile station B designated by the called number information is selected by the mobile communication network 1.
Mobile unit B is notified as a "call setting" signal for notifying an incoming call (Fig. 3b).

The mobile station B which has received the "call setup" signal from the mobile communication network 1 sends the call setup information contained in the "call setup" signal to a station other than the mobile station in which the radio channel failure has occurred, as shown in FIG. Is stored for the purpose of restricting outgoing calls of the mobile phone or restricting incoming calls from other than the mobile device in which the radio channel failure has occurred (FIGS. 4b and 3).
u).

Thereafter, the procedure up to "in communication" (FIGS. 3c to j) in the sequence shown in FIG. 3 is the same as the procedure (FIGS. 12c to j) in the sequence shown in FIG. In FIG. 3, after becoming “in communication”, the synchronization of layer 1 of the mobile device A is lost (FIG. 3 s), and if a time period more than a momentary interruption elapses, the wireless channel of the mobile device A is the same as in the conventional case. Is released abnormally and the call state transitions to an idle state (FIG. 3q). Further, according to the present invention, the fault monitoring timer preset by the user A is activated (see FIG. 3).
v). When the radio channel failure is recovered during the activation of the failure monitoring timer (FIG. 3w), a "call setup" signal B is generated based on the stored call setup information A as shown in FIG. 4 (FIG. 4c). By transmitting to the mobile communication network 1, the mobile device B is automatically called again (FIG. 3x). When the "call setting" signal is generated, since the "call origination / calling type" of the call setting information A stored by the mobile device A is "calling", the "calling number" stored as the call setting information is "call setting". "Calling number" information in the "Calling number" signal, and "Called number" is set in the "Called number" information in the "Call setting" signal.

On the other hand, in FIG. 3, due to the abnormal release of the radio channel of the mobile unit A, the base station of the mobile communication network 1 in which the position of the mobile unit A is registered causes a momentary interruption of the loss of synchronization of the radio channel of the mobile unit A. When the above is detected, the wireless channel failure of the mobile device A is recognized, and the reason display information includes, for example, "disconnection" as shown in FIG.
By sending a signal to mobile unit B (Fig. 3l), mobile unit B
The disconnection recovery procedure of No. 1 is started and completed in the same manner as in the past (FIGS. 3n and 3p).

In the automatic call-back method of the present invention, when the mobile unit B is disconnected and released due to "destination of other terminal" and transits to an idle state (FIG. 3r), a call restriction timer with preset timer value and The incoming call barring timer is activated (Fig. 3
z). In the present embodiment, the case where the outgoing call restriction timer and the incoming call restriction timer are the same (hereinafter referred to as outgoing and incoming call restriction timer) is shown.

If there is an incoming call from mobile unit A having a radio channel failure before the expiration of the outgoing / incoming call restriction timer of mobile unit B, the automatic call setup procedure is completed (FIG. 3y). It is also possible to manually make a call to the mobile device A in which a wireless channel failure has occurred before the expiration of the outgoing / incoming call restriction timer.

During activation of the outgoing / incoming call restriction timer, as shown in FIG. 4, outgoing calls to other than the mobile device in which the radio channel failure has occurred are restricted based on the call setting information A stored in the mobile device B (see FIG. 4).
d), incoming calls from other than the mobile device in which the radio channel failure has occurred are restricted (FIG. 4e). Specifically, in the case of restricting a call to a mobile device other than the mobile device in which the wireless channel failure has occurred, the “call origination / call type” of the call setting information A stored by the mobile device B is “incoming”. Dial from keyboard 8,
The “calling number” of the stored call setting information A is compared, and if they do not match, the call is restricted. In addition, when restricting incoming calls from other than mobile devices with wireless channel failure,
Since the "call origination / call type" of the call setting information A stored by the mobile device B is "incoming call", the "calling number" information included in the "call setting" of a new incoming call to the mobile device B and the storage The "calling number" of the call setting information A is compared, and if they do not match, the incoming call is restricted.

Next, the user A dials the partner user B from the mobile unit A, and before the partner user B answers the incoming call, a radio channel failure occurs in the mobile unit A, and after the radio channel failure is recovered, FIG. 5 shows a sequence diagram of a call control signal in the case of performing a recall setting from the mobile station A to the mobile station B by the automatic recall setup method of the present invention.

Also in FIG. 5, according to the present invention, when the "call setting" signal is generated by the mobile unit A (FIG. 5a), as shown in FIG. 4, the "transmitting capability" information, the "calling number" information, the "calling number" information, Called party number "
The information and the "call origination / termination type" information and the like are stored as call setting information A for re-call setting (FIGS. 4a and 5t).

Further, the mobile station B which has received the "call setup" signal from the mobile communication network (FIG. 5b), as shown in FIG.
The call setting information A included in the "call setting" signal is stored for restricting transmission to a mobile device other than the mobile device in which the wireless channel failure has occurred or for restricting incoming calls from other than the mobile device in which the wireless channel failure has occurred.

Thereafter, the procedure (FIGS. 3c to e) until the mobile station A receives the "call" signal from the mobile communication network 1 in the sequence shown in FIG. 5 will be described in the sequence shown in FIG. Same as e).

In FIG. 5, after the mobile unit A receives the "call" signal from the mobile communication network 1 (thus before the other user B answers the incoming call from the user), the layer 1 of the mobile unit A is out of synchronization. (FIG. 5s), after a lapse of time more than that which can be regarded as a momentary interruption, the wireless channel of the mobile device A is abnormally released and the call state is changed to an idle state as in the conventional case (FIG. 5s).
q). Further, according to the present invention, the fault monitoring timer preset by the user A is started (FIG. 5v). When the wireless channel failure is recovered during the activation of the failure monitoring timer (FIG. 5w), as shown in FIG. 4, a "call setting" signal B is generated based on the stored call setting information A (FIG. 4c). By transmitting to the mobile communication network 1, the mobile device B is automatically called again (FIG. 5x). When the "call setting" signal is generated, the "call origination / termination type" of the call setting information A stored by the mobile device A
Is "calling", the "calling number" stored as call setting information is the "calling number" information in the "call setting" signal, and the "callee number" is "calling number" information in the "call setting" signal. Set to.

On the other hand, in FIG. 5, due to the abnormal release of the radio channel of the mobile unit A, the base station of the mobile communication network 1 in which the position of the mobile unit A is registered causes a momentary interruption of the loss of synchronization of the radio channel of the mobile unit A. When the above is detected, the wireless channel failure of the mobile device A is recognized, and the reason display information includes, for example, "disconnection" as shown in FIG.
By sending a signal to mobile unit B (Fig. 5l), mobile unit B
The disconnection recovery procedure of No. 1 is started and completed in the same manner as in the past (FIGS. 5n and 5p).

In the automatic call-back method of the present invention, when the mobile device B is disconnected and released due to "destination of other terminal" and transits to an idle state (FIG. 5r), a call origination / termination control timer having a preset timer value is set. Is activated (FIG. 5z).

If there is an incoming call from the mobile unit A having a radio channel failure before the call origination / restriction timer of the mobile unit B expires, the automatic call setup procedure is completed (FIG. 5y). It is also possible to manually make a call to the mobile device A in which a wireless channel failure has occurred before the expiration of the outgoing / incoming call restriction timer.

While the outgoing / incoming call restriction timer is being activated, as shown in FIG. 4, outgoing calls to other than the mobile device in which the radio channel failure has occurred are restricted based on the call setting information A stored in the mobile device B (see FIG. 4).
d), incoming calls from other than the mobile device in which the radio channel failure has occurred are restricted (FIG. 4e). Specifically, in the case of restricting a call to a mobile device other than the mobile device in which the wireless channel failure has occurred, the “call origination / call type” of the call setting information A stored by the mobile device B is “incoming”. Dial from keyboard 8,
The “calling number” of the stored call setting information A is compared, and if they do not match, the call is restricted. In addition, when restricting incoming calls from other than mobile devices with wireless channel failure,
Since the "call origination / call type" of the call setting information A stored by the mobile device B is "incoming call", the "calling number" information included in the "call setting" of a new incoming call to the mobile device B and the storage The "calling number" of the call setting information A is compared, and if they do not match, the incoming call is restricted.

Next, after the mobile station A receives an incoming call from the mobile station B and the user A responds to the call and makes communication, a radio channel failure occurs in the mobile station A, and after the radio channel failure is recovered, FIG. 6 shows a sequence diagram of a call control signal in the case of performing a call re-establishment from the mobile station A to the mobile station B by the automatic recall setup method of the present invention.

In FIG. 6, user B at mobile unit B
When the user finishes dialing to mobile device A, "call setup"
The signal is sent to the mobile communication network 1 (Fig. 6a).

In the present embodiment, when the mobile unit B generates the "call setting" signal, as shown in FIG. 4, "transmitting capability" information, "calling number" information, "callee number" information, In addition, the "call origination / termination type" information and the like are stored in order to restrict transmission to a mobile device other than the mobile device in which the wireless channel failure has occurred or to restrict incoming calls from other than the mobile device in which the wireless channel failure has occurred (FIGS. 4a and 3).
u).

When the "call setting" signal transmitted from the mobile unit B is received by the mobile communication network 1, the wireless line of the mobile unit A designated by the called number information is selected by the mobile communication network 1.
Mobile unit A is notified as a "call setting" signal for notifying an incoming call (Fig. 6b).

As shown in FIG. 4, the mobile station A, which has received the "call setup" signal from the mobile communication network 1, changes the call setup information included in the "call setup" signal into the call setup information for re-call setup. It is stored as A (FIG. 4b, FIG. 6t).

Thereafter, the procedure (6c to j) up to "during communication" in the sequence shown in FIG. 6 is the same as the procedure (FIG. 14c to j) in the sequence shown in FIG. In FIG. 6, after becoming “in communication”, the layer 1 of the mobile device A is out of synchronization (FIG. 6 s), and if more time than can be regarded as a momentary interruption elapses, the wireless channel of the mobile device A is the same as the conventional one. Abnormal release is performed and the call state transitions to an idle state (FIG. 6q). Further, according to the present invention, the fault monitoring timer preset by the user A is activated (see FIG. 6).
v). If the wireless channel failure is recovered during activation of the failure monitoring timer (FIG. 6w), a "call setting" signal B is generated based on the stored call setting information A (FIG. 4c), as shown in FIG. By transmitting to the mobile communication network 1, the mobile device B is automatically called again (FIG. 6x). When the "call setting" signal is generated, since the "call origination / call type" of the call setting information A stored by the mobile device A is "incoming call", the "calling number" stored as the call setting information is "call setting". In the "Called number" information of the "Signal" signal, the subscriber number of the mobile device A ("Called number" of the call setting information A) is "Calling number" in the "Call setting" signal.
Set to information.

On the other hand, in FIG. 6, due to the abnormal release of the wireless channel of the mobile unit A, the base station of the mobile communication network 1 in which the position of the mobile unit A is registered causes a momentary interruption of the loss of synchronization of the wireless channel of the mobile unit A. When the above is detected, the wireless channel failure of the mobile device A is recognized, and the reason display information includes, for example, "disconnection" as shown in FIG.
By sending a signal to mobile device B (Fig. 6l), mobile device B
The disconnection recovery procedure of No. 1 is started and completed in the same manner as in the past (FIGS. 6n and 6p).

In the automatic call-back method of the present invention, when the mobile device B is disconnected and released due to "destination of other terminal" and transits to an idle state (FIG. 6r), a call origination / termination control timer having a preset timer value is set. Is activated (FIG. 6z).

If there is an incoming call from mobile unit A having a radio channel failure before the expiration of the outgoing / incoming call restriction timer of mobile unit B, the automatic recall setting procedure is completed (FIG. 6y). It is also possible to manually make a call to the mobile device A in which a wireless channel failure has occurred before the expiration of the outgoing / incoming call restriction timer.

While the outgoing / incoming call restriction timer is being activated, as shown in FIG. 4, outgoing calls to other than the mobile unit in which the radio channel failure has occurred are restricted based on the call setting information A stored in the mobile unit B (see FIG. 4).
d), incoming calls from other than the mobile device in which the radio channel failure has occurred are restricted (FIG. 4e). Specifically, in the case of restricting the call to a mobile device other than the mobile device in which the radio channel failure has occurred, the "call origination / call type" of the call setting information A stored by the mobile device B is "calling". Dial from keyboard 8,
The stored "callee number" of the call setting information A is compared, and if they do not match, the transmission is restricted. In addition, when restricting incoming calls from other than mobile devices with wireless channel failure,
Since the "call origination / call type" of the call setting information A stored by the mobile device B is "calling", the "calling number" information included in the "call setting" of a new incoming call to the mobile device B and the storage The received call setting information A is compared with the called number, and if they do not match, the incoming call is restricted.

Next, before the mobile station A receives an incoming call from the mobile station B and the user A answers, a radio channel failure occurs in the mobile station A. After the radio channel failure is recovered, the automatic re-establishment of the present invention is performed. FIG. 7 shows a sequence diagram of a call control signal when the call setup method is used to set up a call from mobile station A to mobile station B again.

Also in FIG. 7, when the user B ends the dial operation to the mobile device A in the mobile device B, a "call setting" signal is sent to the mobile communication network 1 (FIG. 7a).

In this embodiment, when the mobile unit B generates the "call setting" signal, as shown in FIG. 4, "transmitting capability" information, "calling number" information, "callee number" information, In addition, the "call origination / termination type" information and the like are stored in order to restrict transmission to a mobile device other than the mobile device in which the wireless channel failure has occurred or to restrict incoming calls from other than the mobile device in which the wireless channel failure has occurred (FIGS. 4a and 7).
u).

When the "call setting" signal transmitted from the mobile unit B is received by the mobile communication network 1, the wireless line of the mobile unit A designated by the called number information is selected by the mobile communication network 1.
Mobile unit A is notified as a "call setting" signal for notifying an incoming call (Fig. 7b).

Upon receipt of the "call setup" signal from the mobile communication network 1, the mobile unit A, as shown in FIG. 4, sets the call setup information included in the "call setup" signal to the call setup information for re-call setup. It is stored as A (FIG. 4b, FIG. 7t).

Thereafter, the procedure (FIGS. 7c to 7e) until the mobile station A receives the “calling” signal from the mobile communication network 1 in the sequence shown in FIG. 7 will be described. Same as e).

In FIG. 7, after the mobile unit A receives the "call" signal from the mobile communication network 1 (thus, before the other user B answers the incoming call from the user), the layer 1 of the mobile unit A is out of synchronization. (FIG. 7s), after a lapse of time more than what can be regarded as a momentary interruption, the wireless channel of the mobile device A is abnormally released and the call state is changed to an idle state as in the conventional case (FIG. 7S).
q). Further, according to the present invention, the fault monitoring timer preset by the user A is started (FIG. 7v). If the wireless channel failure is recovered during activation of this failure monitoring timer (FIG. 7w), a "call setting" signal B is generated based on the stored call setting information A (FIG. 4c), as shown in FIG. By transmitting to the mobile communication network 1, the mobile device B is automatically called again (FIG. 7x). When the "call setting" signal is generated, the "call origination / termination type" of the call setting information A stored by the mobile device A
Is an "incoming call", the "calling number" stored as the call setup information is added to the "callee number" information in the "call setup" signal as the subscriber number of the mobile device A (the "callee number" of the call setup information A). )) Is set in the "calling number" information in the "call setup" signal.

On the other hand, in FIG. 7, due to the abnormal release of the wireless channel of mobile unit A, the base station of mobile communication network 1 in which mobile unit A is registered has momentarily lost synchronization with the wireless channel of mobile unit A. When the above is detected, the wireless channel failure of the mobile device A is recognized, and the reason display information includes, for example, "disconnection" as shown in FIG.
By sending a signal to mobile unit B (Fig. 7l), mobile unit B
The disconnection recovery procedure of No. 1 is started and completed in the same manner as in the past (FIGS. 7n and 7p).

In the automatic call-back method of the present invention, when the mobile unit B is disconnected and released due to "destination of other terminal" and transits to an idle state (FIG. 7r), a call origination / termination control timer having a preset timer value is set. Is activated (FIG. 7z).

If there is an incoming call from the mobile unit A having a radio channel failure before the expiration of the outgoing / incoming call restriction timer of the mobile unit B, the automatic recall setting procedure is completed (FIG. 7y). It is also possible to manually make a call to the mobile device A in which a wireless channel failure has occurred before the expiration of the outgoing / incoming call restriction timer.

While the outgoing / incoming call restriction timer is being activated, as shown in FIG. 4, outgoing calls to other than the mobile device in which the radio channel failure has occurred are restricted based on the call setting information A stored in the mobile device B (see FIG. 4).
d), incoming calls from other than the mobile device in which the radio channel failure has occurred are restricted (FIG. 4e). Specifically, in the case of restricting the call to a mobile device other than the mobile device in which the radio channel failure has occurred, the "call origination / call type" of the call setting information A stored by the mobile device B is "calling". Dial from keyboard 8,
The stored "callee number" of the call setting information A is compared, and if they do not match, the transmission is restricted. In addition, when restricting incoming calls from other than mobile devices with wireless channel failure,
Since the "call origination / call type" of the call setting information A stored by the mobile device B is "calling", the "calling number" information included in the "call setting" of a new incoming call to the mobile device B and the storage The received call setting information A is compared with the called number, and if they do not match, the incoming call is restricted.

Next, the user A dials the partner user B from the mobile device A, and the partner user B responds to the incoming call so that the mobile device A is in communication and a radio channel failure occurs in the mobile device A. 8 shows a sequence diagram of a call control signal in the case where the wireless channel failure is not recovered even if the wireless channel failure monitoring time which is designated in advance is monitored by the automatic recall setting method of FIG. A radio channel failure occurs in mobile device A before dialing B and the other user B responds to the incoming call, and the pre-specified radio channel failure monitoring time is monitored by the automatic recall setting method of the present invention. 9 shows a sequence diagram of the call control signal when the radio channel failure is not recovered. In addition, after the mobile device A receives an incoming call from the mobile device B and the user A responds to the call and establishes communication, a radio channel failure occurs in the mobile device A, and according to the automatic recall setting method of the present invention, FIG. 1 is a sequence diagram of a call control signal when the wireless channel failure is not recovered even if the wireless channel failure monitoring time designated in advance is monitored.
0, the mobile station A received a call from the mobile station B, and before the user A answered, a radio channel failure occurred in the mobile station A, which was designated in advance by the automatic recall setting method of the present invention. FIG. 1 is a sequence diagram of a call control signal when the wireless channel failure is not recovered even if the wireless channel failure monitoring time is monitored.
It is shown in FIG.

In FIG. 8 to FIG. 11, when the radio channel failure of the mobile device A occurs and the abnormal release of the radio channel of the mobile device A is performed as in the conventional case, the call state is changed to the idle state (FIG. 8). ~ S, q in Figure 11). Further, according to the present invention, the failure monitoring timer preset by the user A is started (v in FIGS. 8 to 11). If the wireless channel failure does not recover during activation before the failure monitoring timer expires, even if the failure of the wireless channel of the mobile device A is recovered thereafter (w in FIGS. 8 to 11), the remote user B is re-established. No call setup.

On the other hand, in FIG. 8 to FIG.
When the base station of the mobile communication network 1 in which the position of the mobile device A is registered detects the loss of synchronization of the radio channel of the mobile device A for a moment or more due to the abnormal release of the radio channel of the mobile device A, the mobile device A
By recognizing the wireless channel failure of (1) and transmitting the "disconnection" signal as shown in FIG. 16 (f) including "the other terminal is out of order" to the mobile device B as the reason display information (FIGS. 8 to 11). 1), and the procedure for starting and completing the disconnection recovery procedure of the mobile device B is the same as in the conventional case (n and p in FIGS. 8 to 11).

In the automatic call-back method of the present invention, when the mobile device B is disconnected and released due to the "destination of the other terminal" and transitions to the idle state (r in FIGS. 8 to 11), the timer value is set in advance. The outgoing / incoming call restriction timer is activated (Fig. 8 ~
Z) in FIG.

In FIG. 8 to FIG. 11, when there is no incoming call from mobile unit A having a radio channel failure before the expiration of the outgoing / incoming call restriction timer of mobile unit B, mobile unit B releases the outgoing / incoming call restriction. .

Other points in FIGS. 8 to 11 are the same as those in the sequence diagrams in FIGS. 3 and 5 to 7 described above.

The present invention is not limited to the above embodiment.

For example, in the above embodiment, the case where the present invention is applied to the communication terminal of the wireless line interface has been described. However, the present invention is a communication having a wired line interface such as a basic group speed interface of ISDN and a primary group speed interface. It can also be applied to terminals.

Further, in the above embodiment, the case where the communication terminal of the partner user B is a mobile device similarly registered in the base station in which the user A is registered is shown, but the communication terminal of the partner user is shown. Is not limited to a mobile device, and the communication terminal of the partner user B may be a telephone terminal connected to a fixed network connected to the mobile communication network.

Furthermore, in the above embodiment, the case where the mobile device is a telephone is shown, but the mobile device is not limited to a telephone, and may be a data terminal.

Further, in the above-mentioned embodiment, the case where the mobile station has the call state in which the radio channel failure has occurred is "communication" and "calling", but the call state is not limited to this. It may be a state in which another call is being set up (for example, "during response" or "during response confirmation"). In addition, the present invention can be variously modified and implemented without departing from the gist thereof.

[0093]

As described above, according to the automatic re-call system of the present invention, a call interrupted due to a radio failure or the like is automatically re-connected, so that the user can manually perform the re-connection operation. You don't have to.

In addition, efficient communication can be performed without being disturbed by a call from a third party from the occurrence of a failure to the recovery. Therefore, when the mobile device is mounted on the vehicle, safety is also prevented.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a mobile device and a mobile communication network.

FIG. 2 is a diagram showing a configuration of a mobile device to which an automatic recall method according to an embodiment of the present invention is applied.

FIG. 3 is a sequence diagram showing an example of a procedure when the automatic recall method according to the embodiment of the present invention is applied.

FIG. 4 is a diagram for explaining the configuration, operation, etc. of call setting information used in the present invention.

FIG. 5 is a sequence diagram showing another example of a procedure when the automatic call back method according to the embodiment of the present invention is applied.

FIG. 6 is a sequence diagram showing another example of the procedure when the automatic call back method according to the embodiment of the present invention is applied.

FIG. 7 is a sequence diagram showing another example of a procedure when the automatic call back method according to the embodiment of the present invention is applied.

FIG. 8 is a sequence diagram showing an example of a procedure when a timer expires in the automatic recall system according to the embodiment of the present invention.

FIG. 9 is a sequence diagram showing another example of the procedure when the timer expires in the automatic recall system according to the embodiment of the present invention.

FIG. 10 is a sequence diagram showing another example of the procedure when the timer expires in the automatic recall system according to the embodiment of the present invention.

FIG. 11 is a sequence diagram showing another example of the procedure when the timer expires in the automatic recall system according to the embodiment of the present invention.

FIG. 12 is a sequence diagram showing an example of a conventional outgoing / incoming call procedure at the normal time.

FIG. 13 is a diagram showing a structure of a conventional call control message at a normal time.

FIG. 14 is a sequence diagram showing another example of a conventional outgoing / incoming procedure at the normal time.

FIG. 15 is a sequence diagram showing an example of a procedure when a conventional radio channel failure occurs.

FIG. 16 is a diagram showing the structure of a conventional call control message when a radio channel failure occurs.

FIG. 17 is a sequence diagram showing another example of a conventional procedure when a radio channel failure occurs.

FIG. 18 is a sequence diagram showing another example of a conventional procedure when a radio channel failure occurs.

FIG. 19 is a sequence diagram showing another example of a conventional procedure when a radio channel failure occurs.

[Explanation of symbols]

 1 ... Mobile communication network 3 ... Mobile device 5 ... Microprocessor unit

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Claims (6)

[Claims] 1. A communication terminal, wherein call setting information storage means for storing call setting information relating to a partner user at the time of call setting, failure monitoring means for monitoring communication failure between communication terminals, and call setting or communication in progress. When a communication failure occurs in the state, the failure monitoring unit monitors the recovery of the communication failure, and when the communication failure is recovered, the call setting information stored by the call setting information storage unit is used to confirm the call. An automatic recall method, comprising: an automatic recall setting means for automatically performing a reset. 2. A mobile station whose location is registered in a mobile communication network, and a call setting information storage means for storing call setting information relating to a partner user at the time of call setting, and monitoring a failure of a radio channel used by the mobile station. When a failure of the wireless channel occurs during call setup or communication, the failure monitoring means monitors the failure recovery of the wireless channel, and when the failure of the wireless channel is recovered, And an automatic recall setting means for automatically resetting a call using the call setting information stored by the call setting information storage means. 3. A mobile station whose location is registered in a mobile communication network, wherein call setting information storage means for storing call setting information relating to a partner user at the time of call setting, and monitoring for a failure of a radio channel used by the mobile station. Failure monitoring means, the failure monitoring timer is activated when a failure occurs in the wireless channel during call setup or communication, and the failure of the wireless channel is recovered before the failure monitoring timer expires. When detected by the fault monitoring means, the call setup information stored in the call setup information storage means is used to automatically reset the call immediately before the fault of the wireless channel is recovered. An automatic re-calling method, comprising: automatic re-calling setting means that does not reset the call when the monitoring timer expires. 4. A mobile station whose location is registered in a mobile communication network, and at the time of call setup, when the mobile station is the calling side, at least the subscriber number of the other user is used as call setup information relating to the other user. When the mobile station is a called side, the call setting information storage means stores at least the calling number information notified from the other user as the call setting information related to the other user, and is used by the mobile station. Failure monitoring means for monitoring failure of the wireless channel, and when failure of the wireless channel occurs during call setup or communication, the failure monitoring means monitors failure recovery of the wireless channel, and the failure of the wireless channel When the call is recovered, the automatic call re-establishment means for automatically re-establishing the call using the call setup information stored by the call setup information storage means is provided. Automatic re-call method to be. 5. A mobile station whose location is registered in a mobile communication network, and a call setting information storage means for storing call setting information relating to a partner user at the time of call setting, and monitoring a failure of a radio channel used by the mobile station. However, when a wireless condition in which the procedure related to the management of the wireless resource of the mobile station cannot be performed correctly is detected, a failure monitoring unit that determines that a failure has occurred in the wireless channel, and a status during call setup or communication When a failure of the wireless channel occurs, the failure monitoring unit monitors the failure recovery of the wireless channel, and when the failure of the wireless channel is recovered, the call setting information stored by the call setting information storage unit is used. And an automatic recall setting means for automatically resetting the call. 6. A mobile station whose location is registered in a mobile communication network, wherein call setting information storage means for storing call setting information relating to a partner user at the time of call setting, and monitoring of a failure of a radio channel used by the mobile station. Failure monitoring means, and a partner user of the mobile station receives a disconnection recovery signal including reason display information for notifying a radio channel failure of the mobile station from a communication network to which the communication terminal of the partner user is connected. When the disconnection is released by doing so, a call origination / reception regulation means for regulating for a predetermined time a call to a mobile station other than the mobile station in which the radio channel failure has occurred and / or a call reception from a mobile station other than the mobile station in which the radio channel failure has occurred, and a call. When a failure occurs in the wireless channel during setting or communication, the failure monitoring means monitors the failure recovery of the wireless channel to check the failure of the wireless channel. Automatic recall setting means for automatically resetting a call using the call setting information stored by the call setting information storing means when the damage is recovered. .