JPH08130769A - Wireless communication system - Google Patents

Abstract

PURPOSE: To give a precise explanation to an opposite user in the case of abnormal on-hook by outputting at least a prescribed message to the communicating opponent of a portable terminal when the abnormal on-hook occurs. CONSTITUTION: An abnormal on-hook detecting means 61 detects an abnormal on-hook signal from a base station 3. Also, a voice mail means 62 is provided with a voice message output part 621 which outputs a prescribed voice message to the opposite user holding a speech with the user of a portable telephone 4 via a corresponding base station 3 when the means 61 detects abnormal on- hook information, and a message recording/reproducing part 622 which records/ reproduces the voice message from the opposite user. In this way, when the abnormal on-hook occurs in a call between the base station 3 and the portable terminal 4, at least the prescribed message is outputted from the base station 3 to the communication opposite terminal of the portable terminal 4, therefore, the precise explanation representing the abnormal on-hook can be given to the communication opposite terminal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system having a message function for abnormal call termination.

[0002]

2. Description of the Related Art Recently, as a wireless communication system, a PHS (Personal Handy Phone System) using a time-division multiplex type mobile phone capable of calling a caller from outside to talk is being put to practical use.

By the way, in such a PHS, a mobile phone as a slave unit communicates with an outside line via a base station as a master unit. If it drops abnormally, or if the child device goes out of the wireless zone, the call may be interrupted or the call may end abnormally. For this reason, conventionally, when there is a possibility of falling into such an abnormal call, it has been considered that a user of the child device issues a warning sound or the like to call attention.

[0004]

However, such notification by the warning sound only informs the user of the handset that it is difficult to continue the call. In the case of low voltage, it is difficult to recover from this state, and disconnecting the call was unavoidable.

Therefore, conventionally, when such a situation occurs, the user of the child device voluntarily explains the situation to the other party and makes an effort so that the matter can be completed within a limited time. Was needed.

[0006] However, depending on the user of the handset, it is often impossible to accurately explain the current situation even if the warning sound is given. In such a case, the call is cut off without sufficient explanation, There was a problem that it made the other user anxious about mischief.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a wireless communication system capable of giving a proper explanation to a counterpart user when an abnormal end of call occurs. It is another object of the present invention to provide a wireless communication system capable of receiving a message from a partner user.

[0008]

According to the present invention, in a wireless communication system having a base station and a mobile terminal, if an abnormal call is generated between the base station and the mobile terminal, the base station sends the mobile terminal to the mobile terminal. It is configured to output a predetermined message to the communication partner terminal.

According to the present invention, in a wireless communication system having a base station and a mobile terminal, the base station detects an abnormal end call with the mobile terminal, and an abnormal end call detecting means. And a message recording / reproducing means for recording a message from the communication partner terminal while outputting a predetermined message to the communication partner terminal of the portable terminal by detecting the abnormal call end.

Further, according to the present invention, in a wireless communication system having a network supervision station for managing a public network, a base station and a mobile terminal, if an abnormal end call occurs between the base station and the mobile terminal, the network supervision is provided. The station is configured to output a predetermined message to the communication partner terminal of the mobile terminal.

Further, according to the present invention, in a wireless communication system having a network supervision station for managing a public network, a base station and a mobile terminal, the network supervision station has an abnormal end call between the base station and the mobile terminal. And an abnormal end call detection means for detecting abnormal end call information given by the base station, and a predetermined message is output to the communication partner terminal of the mobile terminal by the abnormal end call detection by the abnormal end call detection means. And a message recording / reproducing means for recording a message from the communication partner terminal.

[0012]

As a result, according to the present invention, when an abnormal end of a call occurs between a base station and a mobile terminal, the base station outputs at least a predetermined message to the communication partner terminal of the mobile terminal. Therefore, it is possible to give a proper explanation to the communication partner terminal that the call is abnormal.

Further, according to the present invention, in the base station, when the abnormal end call with the portable terminal is detected by the abnormal end call detecting means, the abnormal end call is detected and the message is recorded in the communication partner terminal of the portable terminal. Since a predetermined message is output from the reproducing means and a message from the communication partner terminal is recorded, even if the call ends abnormally, the mobile terminal side does not make a call again and the communication partner terminal does not call again. You can receive a message from.

Further, according to the present invention, when an abnormal call end between the base station and the mobile terminal occurs, the network supervision station outputs at least a predetermined message to the communication partner terminal of the mobile terminal. It is possible to give a proper explanation from the network supervision station to the communication partner terminal that the abnormal end of the call is complete.

Further, according to the present invention, in the network supervision station, when abnormal termination information provided by the base station due to abnormal termination between the base station and the portable terminal is detected by the abnormal termination detection means, this abnormality is detected. A predetermined message is output from the message recording / reproducing means to the communication partner terminal of the mobile terminal upon detection of the call end, and the message from the communication partner terminal is recorded. The side can receive the message from the communication partner terminal gathered by the network supervision station without making a call again.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration when the wireless communication system of the present invention is applied to PHS. In the figure, reference numeral 1 denotes a telephone public network. To the telephone public network 1, a fixed telephone 2 such as an ordinary home is connected, and a base station 3 installed in a home or the public is connected. A mobile phone 4 as a slave unit can be connected to these base stations 3 by a wireless line.

A network supervision station 6 is connected to the telephone public network 1. This network supervision station 6 supervises the public telephone network 1 comprehensively and has an abnormal end call detection means 61 and a voice mail means 62.

Here, the abnormal end call detecting means 61 is for detecting an abnormal end call signal from the base station 3 which will be described later.
Also, the voice mail means 62 is the abnormal end call detection means 61.
When the abnormal call end information is detected by the user, the voice message output unit 621 that outputs a predetermined voice message to the user of the other party with whom the user of the mobile phone 4 is talking through the corresponding base station 3, and the other party of use A message recording / reproducing unit 622 for recording / reproducing a voice message from a person is provided, and a message recorded in the message recording / reproducing unit 622 can be reproduced and read in response to a request from the corresponding mobile phone 4. It has become.

FIG. 2 shows a schematic configuration of the base station 3 used in such a portable radio system. Hereinafter, a home base station will be described as an example. In this case, 11 is an antenna, and the transmitting / receiving device 12 is connected to the antenna 11. The transmitter / receiver 12 is composed of a frequency conversion unit and a modem. On the reception side of the frequency conversion unit, the signal input from the antenna 11 is input via an antenna switch that divides transmission / reception, and then from the PLL synthesizer. By mixing with the output local oscillation signal of a predetermined frequency, frequency conversion is performed from the 1.9 GHz band to an IF signal in the vicinity of 1 MHz. On the other hand, on the transmitting side, the modulated wave of π / 4 shift QPSK input from the modem is mixed with the local oscillation signal of a predetermined frequency output from the PLL synthesizer to perform frequency conversion into the 1.9 GHz band and the antenna switch Radiation is made from the antenna 11 via the antenna.

On the receiving side of the modem, the IF signal from the frequency converter is demodulated and separated into IQ data, which is transferred to the communication controller as a data string. On the other hand, on the transmission side, IQ data is generated from the data transferred from the communication control unit, modulated into π / 4 shift QPSK, and output to the frequency conversion unit.

A communication control unit 13 and a voice processing unit 14 are sequentially connected to the transmitting / receiving device 12, and a voice network 15 is connected to the voice processing unit 14. Here, the communication control unit 13 performs frame synchronization and slot data format processing. On the reception side, one slot of data is extracted from the received data sent from the modem of the transmission / reception unit 12 at a predetermined timing, After extracting a unique word (synchronization signal) from this data to establish frame synchronization and descramble the control data section and the audio data section, the control data is sent to the control section 17 described later, and the audio data is Voice processing unit 14
Transfer to. On the other hand, on the transmitting side, control data or the like is added to the voice data sent from the voice processing unit 14, a unique word or the like is added after scrambling, and transmission data for one slot is created at a predetermined timing. Then, it is inserted into a predetermined slot in the frame and sent to the modem of the transmitting / receiving unit 12.

The voice processing section 14 is composed of a speech codec and a PCM codec. Of these, the speech codec performs compression / expansion processing of digital data. On the receiving side, the ADPCM sent from the communication control section 13 is used. Audio signal (4bit x 8KHz = 32K
bps) is a PCM audio signal (8bit × 8KHz = 64Kbps)
) And decompress it to output to the PCM codec. On the other hand, on the transmission side, the PCM audio signal sent from the PCM codec is compressed by being encoded into an ADPCM audio signal and output to the communication control unit 13.

The PCM codec is analog /
Digital conversion processing is performed. At the receiving side, the PCM audio signal sent from the speech codec is D / A.
The converted analog voice signal is output to the NCU 15. On the other hand, on the transmitting side, the analog voice signal input from the NCU 15 is A / D converted and the PCM voice signal is output to the speech codec.

NCU (Network Control)
The unit 15 performs mutual conversion between a voice signal and a call voice. Here, the handset 16 is connected and the telephone public network 1 described above is connected.

The transmission / reception unit 12, the communication control unit 13, the voice processing unit 14, and the NCU 15 include the control unit 1
7 is connected to the controller 17, and the ROM 18 and the RAM 1 are connected to the controller 17.
9, a message recording / reproducing unit 20, a key input unit 21, and a display unit 22 are connected.

Here, the control unit 17 controls the entire apparatus according to a predetermined protocol. Further, the control unit 17 has an abnormal end call detecting unit 171 that detects an abnormal end call of a call through the base station 3. The abnormal end call in this case means that the call is not disconnected in the regular procedure, but the wireless link is released due to an abnormality on the mobile phone 4 side.
The call is in a state of being disabled. Specifically, the mobile phone 4
In this state, the wireless link is released when the loss of synchronization with the wireless link continues for a certain period of time, that is, when the synchronization is not restored for a predetermined time or more according to the wireless protocol standard. When the abnormal end call detecting means 171 detects such an abnormal end call, the control unit 17 outputs an abnormal end call detection signal.

As an example of detecting the abnormal end of call, a method of detecting that the power supply voltage on the portable telephone 4 side has dropped to a predetermined level or less can be considered in addition to the above example. ROM18 is
The control program in the control unit 17 is stored.
Further, the RAM 19 temporarily stores data handled by the control of the control unit 17.

The message recording / reproducing unit 20 is activated by the abnormal call termination signal output from the control unit 17, and outputs a predetermined voice message to the other user who is talking through the base station 3. At the same time, a voice message from the other user can be recorded, and the recorded message can be read in response to a request from the mobile phone 4. This message recording / reproducing unit 20 can realize two functions by one device if shared with an answering machine recording / reproducing device.

The key input unit 21 is for inputting a key input for setting each function to the control unit 17.
The display unit 22 displays input data and results for various controls.

Although the above configuration shows an example of the configuration of a home base station, it is basically the same in a public base station, and the public base station serves as a master unit of the above configuration. The necessary handset 16, key input unit 21 and display unit 22 may be deleted.

Next, FIG. 3 shows a schematic structure of the mobile phone 4. In this case, 31 is an antenna, and a transmitting / receiving device 32 is connected to this antenna 31. Then, the communication control unit 33 and the voice processing unit 34 are sequentially connected to the transmitting / receiving device 32, and the speaker 3 on the receiving side is connected to the voice processing unit 34.
5. The microphone 36 on the transmitting side is connected. In this case, the voice processing unit 34 also uses the speech codec and P.
The PCM audio signal, which is composed of a CM codec and is sent from the speech codec, is D / A converted by the PCM codec to output the analog audio signal to the speaker 35, while the analog audio signal input from the microphone 36 is A / A converted. The D-converted PCM audio signal is output to the speech codec.

Further, a control unit 37 is connected to the transmitting / receiving unit 32, the communication control unit 33, and the voice processing unit 34, and a ROM 38, a RAM 39 key input unit 40, and a display unit 41 are connected to the control unit 37.

In this case, the details of each of these units are the same as the configuration of the base station 3 described with reference to FIG. Next, the operation of the embodiment configured as described above will be described.

First, a case will be described in which a message from the other user is recorded by using the message recording / reproducing unit 20 of the base station 3 when an abnormal end of call occurs. In this case, the message recording / reproducing unit 20 basically operates automatically,
The operation of the message recording / reproducing unit 20 of the own station may be instructed in advance by key input from the key input unit 21.

When an external call is made from the mobile phone 4 or an incoming call is made from the other terminal, the base station 3 establishes a wireless link with the mobile phone 4 and, at the same time, uses the other party via the public telephone network 1. As a person, for example, a call line with the fixed telephone 2 is established, and the mobile telephone 4 and the fixed telephone 2 are connected by this call line.
Allows calls to and from.

If a request for disconnecting the call line due to the on-hook of the mobile phone 4 is received from such a call state, the base station 12 releases the wireless link in a predetermined procedure and fixes the other user. Disconnecting the call with the telephone 2 is performed as a general operation.

Next, the operation when an abnormal end of call occurs will be described with reference to the flowchart shown in FIG. Here, the flowchart shown in FIG. 4 is executed from the state where a call is being made between the mobile phone 4 and the base station 3.

First, in step 401, whether or not an abnormal end call has occurred in a call between the mobile phone 4 and the fixed line 2 is detected by the abnormal end call detecting means 171 of the control unit 17. Abnormal termination here is a state in which the call is not terminated in the normal procedure, but the wireless link is released due to an abnormality in the mobile phone 4, and the call is disabled. In this state, the wireless link is released when the loss of synchronization with the wireless link continues for a certain period of time, that is, when the synchronization is not restored for a predetermined time or more according to the wireless protocol standard.

Then, when the abnormal end call detecting means 171 detects the abnormal end call as described above, the base station 3 wirelessly links with the mobile phone 4 in step 402 according to an instruction from the control section 17. , Then step 40
At 3, the message recording / playback unit 20 is activated.

Then, in step 404, the base station 3 concerned
A predetermined message is output from the message recording / reproducing unit 20 to the other party user of the fixed telephone 2 who is making a call via. In this case, the message to the other user may be, for example, "The radio with the mobile phone has been disconnected. If there is a message, please talk after this message."

Then, in step 405, the message recording / reproducing unit 20 is set to the message recording mode according to the instruction of the control unit 17, and the message transmitted from the other user is recorded.

Next, in step 406, the on-hook state of the landline telephone 2 of the other user is detected. In this case, if the public telephone network 1 is, for example, PSTN (analog line), the on-hook of the fixed telephone 2 is the BT (busyton) output by the on-hook of the fixed telephone 2, and the ISDN (digital line network). If there is, a judgment is made by detecting the disconnection signal.

Then, in step 406, when the on-hook of the landline telephone 2 of the other user is detected, step 407.
The message recording / playback unit 20 is instructed by the control unit 17.
Stop the operation of.

After that, the user of the mobile phone 4 operates the base station 3 from the mobile phone 4, and the message recording / reproducing unit 20 is operated.
Is set to the message reproduction mode and the message recorded in the message recording / reproducing unit 20 is reproduced,
You can listen to the message contents left by the other user at the time of abnormal termination.

Next, a case will be described in which a message from the other user is recorded by using the voice mail means 62 of the network supervision station 6 when an abnormal call ends. In this case, the service should be available in advance.

Also in this case, when an external call is made from the mobile phone 4 or an incoming call is made from the partner terminal, the base station 3 establishes a wireless link with the mobile phone 4 and, at the same time, uses the partner via the public telephone network 1. As a person, for example, a call line with the fixed telephone 2 is established, and the mobile telephone 4 and the fixed telephone 2 are connected by this call line.
Allows calls to and from.

Then, in a state where a call is being made between the mobile telephone 4 and the fixed telephone 2, the flow chart shown in FIG. 5 is executed by the network supervision station 6. In this case, as described above, the abnormal end call detecting means 171 of the control unit 17 detects that the abnormal end call has occurred in the call between the mobile phone 4 and the landline phone 2, and the mobile phone is instructed by the control unit 17. From the state in which the wireless link with 4 is released, in step 501, when the abnormal call termination signal from the abnormal call termination detection means 171 of the relevant base station 3 is detected by the abnormal call termination detection means 61, in step 502,
The voice mail means 62 is activated.

Then, in step 503, the voice message output unit 621 outputs a predetermined message to the other user of the fixed telephone 2 who is talking via the base station 3. In this case as well, the message to the other user may be, for example, "The radio with the mobile phone has been disconnected. If there is a message, please talk after this message."

Then, in step 504, the message recording / reproducing unit 622 of the voice mail unit 62 is set to the message recording mode, and the message transmitted from the other user is recorded. Message recording / playback unit 622 in this case
The message recorded in (1) is added with identification data for identifying the corresponding base station 3 and mobile terminal 4.

Next, in step 505, it is determined whether or not the information on the on-hook state of the landline telephone 2 of the other user has been given. Also in this case, if the public telephone network 1 is, for example, PSTN (analog line), the on-hook of the fixed telephone 2 is output by the on-hook of the fixed telephone 2 side.
(Busyton), and if ISDN, the disconnection signal is detected.

When the information on the on-hook state of the landline telephone 2 of the other user is detected in step 505, the operation of the message recording / reproducing section 622 of the voice mail means 62 is stopped in step 506.

After that, the user of the mobile phone 4 contacts the network supervision station 6 from the mobile phone 4 via the base station 3, and based on the identification data of the mobile phone 4, the message recording / reproducing section 622 of the voice mail means 62. Is set to the message reproduction mode and the message recorded in the message recording / reproducing unit 622 is reproduced, so that the content of the message left by the other user at the time of abnormal termination can be heard.

Therefore, according to such an embodiment, when an abnormal call end occurs in the communication between the base station 3 and the portable telephone 4, the base station 3 outputs a predetermined message to the fixed telephone 2 of the communication partner. At the same time, since the message from the communication partner can be recorded, it is possible to give a proper explanation to the communication partner that the abnormal end call has occurred, and the abnormal end call may be given to the communication partner. It can eliminate unnecessary anxiety. Further, even if the call ends abnormally, it is possible to reliably receive the message from the communication partner without making a call again on the mobile phone 4 side.

When abnormal termination occurs in the communication between the base station 3 and the mobile telephone 4, the network supervision station 6 outputs a predetermined message to the fixed telephone 2 which is the communication counterpart of the mobile telephone 4, and the communication counterpart. Since it is possible to record the message from, the network supervision station 6 can intensively give the calling party a proper explanation that the call is abnormal. In addition, it is possible to inform the relevant mobile phone 4 of the message from the communication partner, which is collected by the network supervision station, and thereby reduce the burden on the base station installed at home or the like and make it inexpensive. it can.

The present invention is not limited to the above-described embodiments, but can be modified and implemented as appropriate without departing from the scope of the invention.
For example, in the above-described embodiment, when an abnormal end of call occurs,
Although the message from the other user is recorded after the predetermined message is output, only the message explaining the abnormal end of the call may be output.

[0056]

As described above, according to the present invention, it is possible to output at least a predetermined message to the communication partner of the mobile terminal when the abnormal end call occurs. It is possible to give a proper explanation to that effect, and it is possible to eliminate unnecessary anxiety that may be given to the communication partner due to the occurrence of abnormal termination. In addition, the message from the calling party can be recorded together with the output of the message to the communicating party, so even if the call ends abnormally,
It is possible to receive a message from a communication partner without making a call again on the mobile terminal side, save unnecessary labor, and improve usability.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of a mobile wireless system according to the present invention.

FIG. 2 is a diagram showing a schematic configuration of a base station used in one embodiment.

FIG. 3 is a diagram showing a schematic configuration of a mobile phone used in an embodiment.

FIG. 4 is a flowchart for explaining the operation of the embodiment.

FIG. 5 is a flowchart for explaining the operation of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Telephone public network, 2 ... Fixed-line telephone, 3 ... Base station, 4 ... Mobile telephone, 6 ... Network supervision station, 61 ... Abnormal termination detection means, 62 ... Voice mail means, 621 ... Voice message output section, 622 ... Message recording / playback unit, 11, 31 ... Antenna, 12, 32 ... Transceiver device, 13, 33 ... Communication control unit, 14, 34 ... Voice processing unit, 15 ... NCU, 16 ... Handset, 17, 37 ... Control unit, 18 , 38 ... ROM, 19, 39 ... RAM, 20 ... Message recording / reproducing section, 21, 40 ... Key input section, 22, 41 ... Display section, 35 ... Speaker, 36 ... Microphone.

Claims (4)

[Claims] 1. In a wireless communication system having a base station and a mobile terminal, when an abnormal call end occurs between the base station and the mobile terminal, the base station sends a predetermined message to a communication partner terminal of the mobile terminal. Wireless communication system. 2. A wireless communication system having a base station and a mobile terminal, wherein the base station includes an abnormal end call detecting means for detecting an abnormal end call between the mobile terminal and the abnormal end call detecting means. A wireless communication system comprising: a message recording / reproducing unit that outputs a predetermined message to a communication partner terminal of the mobile terminal upon detection of an abnormal end of call and records a message from the communication partner terminal. 3. A wireless communication system having a network supervision station for managing a public network, a base station and a mobile terminal, wherein when an abnormal end call occurs between the base station and the mobile terminal, the mobile station is operated by the network supervision station. A wireless communication system which outputs a predetermined message to a communication partner terminal of the terminal. 4. A wireless communication system having a network supervision station managing a public network, a base station, and a mobile terminal, wherein the network supervision station is the base station due to an abnormal end call between the base station and the mobile terminal. Abnormal end-call detection means for detecting abnormal end-call information given by the abnormal end-call detection means, and a predetermined message is output to the communication partner terminal of the portable terminal by the abnormal end-call detection by the abnormal end-call detection means and the communication partner terminal And a message recording / reproducing means for recording a message from the wireless communication system.