JP3367605B2 - Callback communication control method and system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call back communication control method and a call back communication control apparatus using the method, and mainly when a communication channel in a mobile communication system is full, a call back registration of a mobile terminal. The present invention relates to a callback communication control method and apparatus for making a callback in response to the above request.

[0002]

2. Description of the Related Art Generally, in a mobile phone system, the number of users that can be serviced by one base station, that is, the number of communication lines (the number of communication channels) is fixed, and if all the communication lines are used, line busy occurs. Since the connection cannot be established even if a new call is made, processing such as issuing a "BEEP" sound is performed. However, this "BEEP" sound does not indicate whether the device is malfunctioning or the line is busy.

In view of this, in Japanese Unexamined Patent Publication No. 10-136460, when it is detected that there is no available communication channel, the user is notified by synthetic voice, and a question is asked as to whether or not to automatically re-call. It is described that the voice output means and the means for repeating the re-call to the same telephone number as the call at a predetermined time interval until the call can acquire the communication channel can perform the processing suitable for the user. .

Further, Japanese Laid-Open Patent Publication No. 11-41650 relates to a location management method for determining whether a system cordless telephone is in or out of service (out-of-range), and a base station responds wirelessly to a wireless connection request from a mobile station. If it is impossible due to channel busy or wireless connection error, the mobile station is notified of the reason for the inability to respond, and in order to accurately determine the necessity of re-calling, between the base station controlled by the main device and the mobile station. When it is impossible to connect with, it is stated that the base station transmits the identification code of the mobile station and the location notification signal of the mobile station to the main device, and the main device transmits the connection impossible information including the reason for the inability to the mobile station. Has been done.

On the other hand, there is a communication system in which a subscriber wireless system, which is inexpensive in construction cost, is installed instead of installing a wired telephone in a place where a conventional wired line network is not installed, which will be described with reference to FIG. .

In FIG. 1, reference numeral 4 denotes a telephone on the side of a wired line network, which is connected to the exchange 1 through a subscriber line 5. The subscriber exchange system is an existing exchange system up to the exchange 1, and a system connected to the exchange system.

The subscriber radio system is connected to the subscriber radio system base station 2 from the exchange 1 via the subscriber line 6. From the antenna 7 of the base station 2 through the wireless line 8, the antenna 9 is connected to the terminals 3-1 to 3-n.

In the subscriber wireless system, the exchange 1
With respect to the subscriber line that connects the base station 2 and the base station 2, it is necessary to effectively use a limited communication channel because the lines are concentrated in the radio 8.

[0009]

However, the conventional subscriber radio system has the following problems. The first problem is that the call channel exists between the base station and the subscriber terminal, but since there are few TSs between the base station and the subscriber terminal due to the concentration of lines from the exchange, the call channel tends to become busy. , No matter how many times the subscriber's telephone set 4 makes a call, a busy tone is sent from the telephone set 4, and the subscriber may not know when the line busy state is released. It means that it will end up.

Further, in the above-mentioned conventional publication, it is notified that the line is busy, but it is not known when it will be released, and it will take some time to get the opportunity to call again. There are times when the user's anxiety during the period and the opportunity cannot be immediately connected, and I hate too many troubles.

The object of the present invention is to provide a call back registration by a subscriber on the subscriber terminal side when the call channel between the base station and the subscriber terminal is busy, so that The base station notifies the user of the call back notification so that a normal call can be made and unnecessary call from the subscriber on the subscriber terminal side can be avoided. Furthermore, the subscriber terminal can provide a service that allows the subscriber to make a call, such as LED lighting, terminal vibration (in the case of a mobile terminal), and ringback reception sound, depending on the function of the subscriber terminal. To do so.

[0012]

The present invention provides a callback communication control method for a subscriber wireless system in which a mobile terminal of a subscriber and a wireless base station perform wireless transmission / reception, and a method of controlling the communication between the mobile terminal and the wireless base station is provided. When the call channel is busy, the mobile terminal performs callback registration to the radio base station, and when the call channel managed by the radio base station becomes available, the mobile base station moves from the radio base station to the mobile station. When notifying the terminal that the call channel is available by a callback notification , the mobile terminal turns off.
Is requested to establish a link to the radio base station,
The radio base station is busy with the call channel of the time slot.
The status of the mobile device and notify the mobile terminal that it is busy.
Then, the mobile terminal issues an LBT and registers a callback.
To the wireless base station, and the wireless base station has registered
To that effect, the mobile terminal notifies the mobile terminal of the authentication.
Click the button to confirm the callback registration and
The mobile terminal goes on-hook and the wireless base station
If there is a vacancy in the
It is characterized by performing a back.

The present invention is also directed to a subscriber's mobile terminal and radio.
Subscriber wireless system that wirelessly transmits and receives with base stations
In the call back communication system of
A station is a channel that manages the operating communication channels it manages.
Channel data management unit and the management data of the channel data management unit.
Monitor whether the management channel is available or not
A vacancy detecting means for detecting and a call bar from the mobile terminal.
A callback registration unit that accepts and registers
Telephone number of mobile terminal registered in the callback registration section
And a call control management unit for making a call to the mobile terminal.
Is a wireless circuit unit that performs wireless communication with the base station, and
When performing callback registration, the wireless base station
Called after receiving notification from the callback registration department
Confirmation means to be pressed to confirm the back permission, and the wireless
And a receiving circuit that receives the callback signal from the base station.
The wireless base station is available by the availability detecting means.
Said mobile that originated the call if there is no communication channel
Send a notification to the terminal recommending the callback registration,
The request for registration of the callback is met from the mobile terminal
In case of registering to the callback registration unit, detecting the empty space
When an empty channel occurs in the communication channel by means
An empty channel to the mobile terminal by the call control management unit
It is characterized by notifying the presence of .

The present invention also provides a PHS, a mobile phone, and
In a subscriber radio system such as a wireless local loop system that is installed only in a local area, when the call channel between the subscriber's mobile terminal and radio base station is busy, By registering the call back to the station, when the call channel managed by the wireless base station becomes available, the base station notifies the subscriber terminal with a call back notification, so that unnecessary call from the subscriber terminal is possible. The feature is that it is not necessary to make a call operation.

Further, the present invention will be described with reference to FIG. 2, which is a block diagram showing the contents of the base station 10. In the base station 10, the T that manages the TS under the control of the base station
The S data management unit 15, the SUB that is stored when the subscribers under the base station 10 carry out the callback registration: the callback subscriber registration unit 13, and T before the notification of the callback.
TS ATB which detects that TS is empty from ATB (All Time Slot Busy) → Availability detection unit 14
And a control unit 12, a call control management unit 16, and a wireless circuit unit 11. The TS data management unit 15 manages TS information managed by the base station from the TS managed by the base station 1 to the TS managed by the base station m so that a plurality of base stations such as CS (Cell Station) can be represented. It is possible to manage in 15.

In this way, according to the present invention, since the callback subscriber registration information under the control of the base station is managed,
When a callback subscriber is registered under a certain base station, the TS under the base station is monitored to be emptied from the ATB, and when it becomes empty, the subscriber under the base station is monitored. When the call back notification is transmitted, the subscriber terminal knows the state in which the subscriber can make a call by the function of the subscriber terminal, for example, LED lighting, terminal vibration, and ring back tone. Can enable services that can.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described.
A detailed description will be given with reference to the drawings.

(1) Description of Configuration First, a configuration diagram of a mobile communication system will be described with reference to FIG. As mentioned above, in the telephone 4 on the wired network side,
It is connected to the exchange 1 through a subscriber line 5 such as a twisted pair line, and is connected to the base station 2 through a line 6 such as a public line or an ISDN (Integrated Digital Communication Network) line via a single or a plurality of exchanges 1. Has been done. In this case, the existing exchange system up to the base station is connected to the subscriber radio system.

The subscriber radio system is connected to the subscriber radio system base station 2 and passes from the antenna 7 of the base station 2 through the radio line 8 to the mobile terminal 3-1 through the antenna 9.
Connected to 3-n. In the subscriber wireless system,
Since the line 6 of the subscriber line connecting the exchange 1 and the base station 2 is concentrated by the radio 8, it is necessary to effectively use the limited communication channel.

Here, the call channel exists between the radio base station 2 and the subscriber mobile terminals 3-1 to 3-n, but since the line is concentrated from the exchange 1, the radio base station 2 and the subscriber terminal 3- are present. 1 to
It is assumed that the number of time slots (TS) for 3-n is smaller than the number of lines between the exchange 1 and the radio base station 2. Furthermore, since the number of time slots (TS) between the radio base station 2 and the subscriber terminals 3-1 to 3-n is smaller than the number of lines between the exchange 1 and the radio base station 2, a system in which a call channel is likely to be busy Is assumed.

The radio base station 2 and the subscriber terminals 3-1 to 3-1
When the communication method is TDD (Time Division Duplexing), the number of time slots (TS) for 3 to n is m, and the number of time slots for each communication channel is m, where N is the number of wireless communication channels. Then, the total number of time slots is N × m, which means that N × m channels can be used. Therefore, the base station 2 has N ×
m mobile terminals.

Referring to FIG. 2, there is shown a block diagram showing the contents of the base station 2 as an embodiment of the present invention. In addition, the mobile communication system is a PHS (Personal Han
In the case of dyphone system), when the ISDN line is connected to the base station 2 and the fixed terminal or the mobile phone is addressed from the mobile terminal, the data is transmitted to the exchange or other base station via the ISDN line. The communication with the destination is enabled.

In FIG. 2, the base station 2 determines which TS in the time slot (TS) which is the number of channels under the base station 2.
TS data management unit 1 that manages whether or not
5 and a SUB that is stored when a subscriber under the base station 2 makes a callback registration: a callback subscriber registration unit 13
A TS-ATB → vacancy detection unit 14 which detects that the TS is vacant from ATB (all time slot busy) before notifying the callback, and a control unit 12 which controls the entire base station. When busy, the call control management unit 16 controls a call to the mobile terminal, and the wireless circuit unit 11 performs communication for transmission / reception with the mobile terminal.

The TS information under the control of the base station managed by the TS data management unit 15 is a cell base station that controls a single cell so that it can represent a plurality of base stations such as a cell base station CS (Cell Station). In addition, the TS data management unit can manage the TSs under the control of the base station 1 to the TSs under the control of the base station m. In addition, the control cell base station that controls a plurality of cell base stations may be managed by the TS data management section of any base station based on the TS information.

When the subscriber mobile terminal 3 subordinate to the base station 2 makes a call and is in the all-time busy ATB state, and when it is determined that a call back is necessary, the subscriber terminal 3 sends the base station 2 to the base station 2.
Callback registration is executed and the registration is stored in the SUB: Callback subscriber registration unit 13 of the base station 2 for the subscriber registration. The TS data management unit 15 manages the TS status under each base station 2, and the TS-AT
The B → vacancy detection unit 14 constantly monitors that the TS of the base station 2 in which the callback subscriber is registered becomes empty from the ATB. When it is detected that the TS under the certain base station where the call back registered subscriber is present becomes empty from the ATB, a call back notification command is sent from the call control management unit 16 via the control unit 12 to the wireless circuit. It is transmitted from the base station 10 through the unit 11.

Referring to FIG. 3, there is shown a block diagram showing contents of the subscriber terminal 3 as one embodiment of the present invention.

FIG. 3 is a block diagram showing the contents of the subscriber terminal 3. In the subscriber terminal 3, a radio circuit section 18 which controls transmission / reception of radio between the base station 2 and the subscriber terminal 3 and a call circuit section 1 which is an interface with the subscriber.
9, a LBT (Local Busy Tone) sending unit 21 that informs the subscriber terminal 3 when the TS managed by the base station 2 is busy, and a subscriber that detects callback registration from the subscriber terminal. When the button press detection circuit 22 and the callback registration in the base station are normally saved, the base station sends a callback registration permission to the subscriber terminal. When the TS managed by the base station becomes available from the busy state, a callback notification is sent from the base station to the subscriber terminal. Therefore, a callback signal receiving circuit unit 25 for detecting the callback notification is provided. The subscriber notification circuit unit 26 for notifying the subscriber of the callback notification by the callback notification notified from the base station to the subscriber terminal, the control unit 20, and the call control It is composed of a 23.

Here, the wireless circuit section 18 is a system system such as PHS system or PDC (Personal Digital Cellular), or IMT-2000 (International Mobile Telec).
ommunication-2000) CDM in the recommended system
It may be an A system or the like, and a transmission / reception unit according to each system is provided. Further, the communication circuit section 19 is provided with a microphone and speaker of a handset, a drive circuit for earphones, vibration notification and the like, a data codec for transmitting and receiving data, and the like. The button in the subscriber button press detection circuit unit 22 may also be used as an input button at the time of callback registration, or as a numeric keypad for inputting a destination telephone number, contact information to a pager, or the like. Good.

When the subscriber mobile terminal 3 under the control of the base station 2 makes a call and is in the ATB state, when it is determined that a callback is necessary, callback registration is executed and it is detected that the callback registration has been made. It is the subscriber button press detection circuit unit 22 that does this. The subscriber who registered the callback cannot know whether or not the callback is actually registered if nothing happens. Therefore, the subscriber terminal receives the callback registration permission information from the base station and the callback registration permission receiving circuit. Through the unit 24, the subscriber notification circuit unit 26
It is possible to notify the subscriber that the callback has been successfully registered.

In the subscriber notification circuit section 26, the subscriber terminal 3
It seems that various operations can be applied depending on the function of, but, for example, letting the subscriber know that the callback registration has been normally registered by lighting the LED, shaking the terminal (mobile terminal), ringing the callback registration permission sound, etc. You can

Next, in the base station 2, the fact that the TS of the base station 2 and the subscriber terminal 3 has become empty from the ATB is sent from the base station 2 to the subscriber terminal 3 by a callback notification command. Therefore, it is possible to notify the subscriber through the callback signal receiving circuit unit 25 that the subscriber notification circuit unit 26 has received the callback notification. In the subscriber notification circuit unit 26, various operations can be applied depending on the function of the subscriber terminal.
Due to LED lighting, terminal vibration, ringback sound, etc.
It is possible to inform the subscriber that the TS is available and the call can be made.

(2) Description of Operation Next, the operation contents of the base station 2 of FIG. 2 and the subscriber terminal 3 of FIG. 3 will be described using the callback registration and callback notification sequence of FIG. . As a premise of communication, the base station 2 and the subscriber terminal 3 communicate at the time of an incoming call and a call whether or not a call is possible on a control channel different from the communication channel, and after confirming the link, shift to the call channel. I shall.

In FIG. 4, when a call is generated from a subscriber mobile terminal 3 under the base station 2 when the TS state of the base station 2 managed by the base station 2 is busy, from the subscriber terminal 3 The off-hook signal is sent, and the link establishment process is executed between the subscriber terminal 3 and the base station 2. Since the base station 2 detects the busy state of the TS, the base station 2 transmits a TS no allocation notification to the subscriber terminal 3. By receiving the notification of no TS allocation, the subscriber terminal 3 sends L to the subscriber.
BT is transmitted. The subscriber recognizes that the line is busy by listening to the LBT tone. If not particularly in a hurry, the subscriber can either place the handset there or
Turn off the power of the mobile terminal and exit.

However, if it is desired to make a call immediately, the callback registration process is executed so that the call can be made as soon as it is known that the line is free. For example, the subscriber terminal 3 is provided with a callback registration button. The callback registration is executed by pressing the callback registration button. The other is hooking (hookin
g) Depending on the operation, various applications such as executing callback registration can be performed. The callback registration is performed by pressing the callback registration button, and the subscriber terminal 3
The authentication process is performed between the base station 2 and the base station 2. If the authentication result is normal, the callback registration is performed in the base station 2,
The callback registration permission notification is transmitted to the subscriber terminal 3. Upon receiving the callback registration permission notification, the subscriber terminal 3 causes the subscriber to recognize the callback permission.
For example, the subscriber is notified by turning on an LED that notifies by turning on / blinking light, by vibrating a terminal to notify the wearer of vibration (in the case of a mobile terminal), and by calling back a call-back permission sound with a voice of a specific frequency or pattern.

By notifying the callback permission,
Encourage the subscriber to hang up the handset. Alternatively, the user is prompted to turn off the power of the mobile terminal.

Next, when the information of the TS under the control of the base station of the TS data management unit in the base station 2 of the telephone changes from the ATB state to the vacant state, the base station 2 transfers to the subscriber terminal 3,
The callback command is transmitted, and the subscriber terminal 3 receives the callback command and executes the callback notification process. Various operations can be applied to the callback process depending on the function of the subscriber terminal 3.
For example, the subscriber can be notified that the TS is available and that a call can be made, by lighting an LED that specifies the cancellation of the ATB state, vibration of the terminal (in the case of a mobile terminal), ringing of a callback reception sound, and the like. it can. After that, the subscriber is allowed to enter the normal calling operation.

In the above-described embodiment, the example of the callback registration between the base station and the mobile terminal has been mainly described, but the present invention can be applied to a fixed line telephone of a public network which wants to communicate with the portable terminal. If there is, the destination mobile terminal sends to the fixed telephone whether the base station located in the area is ATB via the exchange. If the fixed telephone requests callback registration, When the TS is available from the ATB state, the base station notifies the fixed telephone of the registration and notifies the fixed telephone of the call back to prompt the fixed telephone to make a call.

[0038]

As described above, the present invention has the following effects. A first effect is that in a subscriber radio system such as a PHS, a mobile phone, and a wireless local loop system which is installed only in a local area, a call channel between a base station and a subscriber terminal is busy. At times, the subscriber registers a call back, and when the call channel becomes available, the base station notifies the caller with a call back notification so that a normal call can be made and unnecessary call from the subscriber terminal is prevented. It is to be able to finish with.

The second effect is that the base station manages the registration of the callback subscribers under the control of the base station. Therefore, if the callback subscribers are registered under a certain base station, that base station is registered. It monitors that the TS under its control becomes empty from the ATB, and when it becomes empty, a callback notification is sent to the subscribers under the control of the base station, so that the subscriber terminal can use its subscriber terminal function. , For example LED
It is possible to provide a service that can notify the subscriber of a callable state by lighting, terminal vibration (in the case of a mobile terminal), ringback reception sound, and the like.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a mobile communication system of the present invention.

FIG. 2 is a configuration diagram of a base station in the mobile communication system of the present invention.

FIG. 3 is a configuration diagram of a subscriber mobile terminal in the mobile communication system of the present invention.

FIG. 4 is a sequence diagram of the mobile communication system of the present invention.

[Explanation of symbols]

1 exchange 2 base stations 3-1 and 3-2 Subscriber mobile terminal 4 fixed telephone 5 public line 6 public network 7 antenna 8 wireless 9 antenna 11 Wireless circuit 12 Control unit 13 Sub: Callback subscriber registration section 14 TS-ATB → vacancy detector 15 TS data management section 16 Call control management unit 18 Wireless circuit section 19 Call circuit section 20 Control unit 21 LBT transmitter 22 Subscriber button press detection circuit 23 Call control unit 24 Callback registration permission reception circuit section 25 Callback signal receiving circuit 26 Subscriber notification circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04B ^7/ 24-7/26 H04Q ⁷ /00-7/38

Claims (2)

(57) [Claims] 1. A call back communication control method for a subscriber wireless system in which a mobile terminal of a subscriber and a wireless base station wirelessly transmit and receive, wherein a call channel between the mobile terminal and the wireless base station is in a busy state. At the time, the mobile terminal performs callback registration to the radio base station, and when the call channel managed by the radio base station is available, the call is notified from the radio base station to the mobile terminal by a callback notification. when notified that the channel is vacant, the mobile terminal is off-hook, phosphorus to the radio base station
Requesting the establishment of a communication channel , the radio base station
Detecting a busy status and indicating that the mobile terminal is busy
Notify, the mobile terminal issues an LBT and registers the callback before
The wireless base station makes a request, and the wireless base station notifies the mobile terminal of the registration.
Then, the mobile terminal calls back by clicking the authentication button.
Confirm the registration, the mobile terminal goes on-hook and is forwarded by the radio base station.
If the time slot becomes available, the mobile terminal
A callback communication control method characterized by making a call back to . 2. A call back communication system of a subscriber wireless system in which a mobile terminal of a subscriber and a wireless base station wirelessly transmit and receive, wherein the wireless base station manages channel data for managing the operation of a managed communication channel. A management unit, a vacancy detection unit that monitors and detects whether or not there is a vacancy in the management channel based on the management data of the channel data management unit, and a callback registration unit that receives and registers callback registration from the mobile terminal. A call control management unit for making a call to the telephone number of the mobile terminal registered in the callback registration unit, the mobile terminal wirelessly communicating with the base station.
And the wireless base when performing the callback registration.
Notification of registration from the callback registration section of the ground station
Confirmation method to receive and press to confirm callback permission
And receives a callback signal from the wireless base station.
A receiving circuit, the radio base station transmits a notification recommending the callback registration to the mobile terminal that has originated a call when the idle detection means has no available communication channel, and the mobile terminal When the request for call back registration from the mobile terminal is received from the mobile terminal, the call registration is registered in the call back registration unit. Call back communication system characterized by notifying.