JP2003046673A - Communication equipment, terminal equipment and condition display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide communication equipment by which a user can learn conditions when a trouble occurs in Internet connection service and wasteful access from the user can be eliminated and to provide terminal equipment. SOLUTION: The condition monitoring part 14 of a digital mobile subscriber exchange 1 monitors the connection conditions of the Internet by a notice received from a gateway device and detects the occurrence of abnormal conditions when it occurs. Information on the monitoring result is transferred to a mobile station control part 13. When a position registration request from a terminal equipment side is received by the digital mobile subscriber exchange 1, the mobile station control part registers the position of terminal equipment and returns a response to which information of 'normal' or 'abnormal' is added in accordance with the connection conditions of the Internet, which is recognized at that time, to the terminal side. Terminal receiving it can display data corresponding to the conditions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device and a terminal device used in a telephone network or the like. In particular, the present invention relates to a communication device and a terminal device for a mobile phone network connectable to a data communication network such as the Internet.

[0002]

2. Description of the Related Art In recent years, mobile communication carriers have provided services that allow mobile phones to connect to the Internet. This is separate from the call service between mobile phone terminals provided using a telephone network or the call service between a mobile phone terminal and a fixed-line phone terminal, and between a mobile phone terminal and a computer connected to the Internet. Internet Protocol (Inte
It enables communication by rnet Protocol (IP). Here, the computer connected to the Internet is, for example, HTML (Hyper-text Markup Language).
ge, hypertext markup language) is a web server that provides hypertext data, image or video data, etc.

The Internet connection service from such a mobile phone terminal is realized by the following technologies. That is, data sent from the mobile phone terminal side to the Internet is branched at a predetermined exchange in the mobile communication network and passed to the gateway device. The gateway device is connected to the Internet, performs the necessary protocol conversion, and then sends the data to the Internet. In addition, the data sent from the Internet side to the mobile phone terminal is first received by the gateway device described above, subjected to the necessary protocol conversion and then taken into the mobile communication network, and delivered to the mobile phone terminal via the exchange. To be done. Further, a signal of a telephone call between mobile phone terminals or the like is delivered to the other party only through the telephone network without being branched to the gateway device side in the exchange.

[0004] Also, a service is planned by a telecommunications carrier so that a computer on the Internet can be connected not only from a mobile telephone terminal but also from a fixed telephone terminal. This also uses a mobile communication network or is fixed. Basically, it is realized by a technique similar to the above technique, only the difference is whether to use a system communication network.

[0005]

The above-mentioned Internet connection service may be completely unusable due to a failure or the service level may be significantly lowered, and at least at a frequency higher than the failure frequency of the telephone network.
It is empirically known that an Internet connection service failure occurs.

There are various possible reasons for this, but it is presumed that it is largely due to the characteristics of the Internet itself. In other words, the Internet has more fluctuations in communication traffic than the telephone network, is difficult to predict, and in some cases is likely to generate many times more communication traffic than expected. Also, the Internet is a complex network constructed by more operators than the telephone network, and it seems that failures due to multiple factors are more likely to occur than the telephone network. In addition, the Internet is constructed using technology that advances faster than the telephone network,
Its scale is expanding rapidly, and technical stability seems to be relatively low.

Further, in the above-mentioned Internet connection service, the gateway device portion is likely to become a bottleneck for communication, and when the communication volume increases, the load concentrates on this portion, resulting in an extreme deterioration or down of function. In some cases.

[0008] By the way, even when such a failure or functional deterioration occurs, the user of the portable terminal device cannot accurately recognize such a situation. In addition, even if some kind of abnormality can be recognized due to deterioration of communication response etc., it is likely that if communication is temporarily crowded, it will return to the normal state immediately, or a failure will occur. However, it is not possible to know exactly if it will not recover immediately. Further, even if the user can recognize that the failure is once, the user does not know when the failure will be recovered. Therefore, the user
To check the situation, a connection to the web server is repeatedly tried, and such an attempt to access further increases the communication traffic of the network and delays recovery from the failure, resulting in a vicious circle.

The present invention has been made in consideration of the above circumstances, and in the event of a failure of the Internet connection service, the user can know the situation, and wasteful access from the user can be prevented. An object of the present invention is to provide a communication device and a terminal device that can be eliminated.

[0010]

In order to solve the above problems, the present invention transfers the data received from the terminal device side to the telephone network side and the data network side, and from the telephone network side and the data network side. A communication device that transfers received data to a terminal device side, and includes a status monitoring unit that monitors a connection status on the data network side, and control information including information according to the connection status monitored by the status monitoring unit. A gist of a communication device is characterized in that it is provided with a control unit for transmitting to a terminal device side. Here, the data network is a network for communicating digital data, an example of which is the Internet. Here, the data received by the communication device from the mobile terminal side includes both user application data and voice data that is digitized voice transmitted through the telephone network. Further, the connection status monitored by the status monitoring unit includes a status in which communication can be normally performed through the data network, a status in which congestion occurs due to an increase in communication traffic, and a status in which communication cannot be performed due to a device failure or the like. .

Further, in the communication apparatus of the present invention, when the status monitoring unit receives notification information indicating an abnormality from the gateway device for connection with the data network side, the control unit causes the connection status to be determined. Is transmitted to the terminal side, which indicates that the control information is abnormal.

Further, in the communication device of the present invention, when the status monitoring unit times out while waiting for a notification from the gateway device for connection with the data network side, the control unit determines the connection status. Is transmitted to the terminal side, which indicates that the control information is abnormal.

Further, in the communication apparatus of the present invention, the status monitoring section receives information on a connection status from another communication apparatus via a relay telephone line, and based on the information on the connection status, the control section, The control information is transmitted to the terminal device side.

Also, the communication device of the present invention is an exchange of a mobile communication network, and the control unit includes a control including the connection status information when registering the position of the mobile station from the terminal device side. It is characterized in that the information is transmitted to the terminal device side.

The terminal device of the present invention is a terminal device that can be connected to both a telephone network and a data network via a communication device, and has a display section capable of displaying characters and symbols and a receiving device from the communication device. And a control unit that controls the display unit to display differently according to the information on the connection status of the data network.

The terminal device of the present invention is a mobile terminal device that serves as a mobile station of a mobile communication network, and when the base station requests location registration, the base station confirms the connection status of the data network. It is characterized in that it receives information.

Further, the terminal device of the present invention is characterized in that it detects the web connection status and displays differently in the detected status.

The present invention also provides a status display method in a communication system comprising a terminal device and a communication device for branching communication from the terminal device to a telephone network and the Internet, wherein the communication device is the Internet. And a second step of sending information including this situation from the communication device to the terminal device,
In the terminal device, a third step of displaying different screens depending on whether the received status indicates normal or abnormal is provided.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a mobile communication network according to this embodiment. Figure 1
In FIG. 1, reference numeral 1 is a digital mobile subscriber exchange (communication device) provided in a mobile communication network, and this digital mobile subscriber exchange 1 is connected to another exchange through a trunk telephone line. Reference numeral 2 denotes a gateway device, which is connected to the digital mobile subscriber switchboard 1 and plays a role of connecting the telephone network and the Internet.

Reference numeral 4 is a base station control device (BCE) for controlling the base station, and 5 is a voice processing device for converting a voice signal between the portable terminal side and the relay telephone line side. 6 is
A modulator / demodulator (MDE) for modulating a digital signal on the exchange side for wireless transmission to the mobile terminal device side and demodulating a signal received from the mobile terminal device side into a digital signal. Reference numeral 7 is a signal amplifier (AMP) that amplifies a signal transmitted or received wirelessly. 8 is
An antenna for transmitting and receiving radio signals. The base station control device 4, the voice processing device 5, the modulation / demodulation device 6, the signal amplification device 7, and the antenna 8 are provided for each base station. Reference numeral 3 is a mobile terminal device which is under the control of this base station and which transmits and receives radio signals to and from the base station. In addition,
Specific examples of the mobile terminal device 3 include a mobile phone terminal and a PHS.
(Registered trademark) terminals and other portable computers having terminal functions of mobile communication networks. For example, PDA (Personal Digital Assistant) with communication function
The device is also a kind of the mobile terminal device 3 described above.

When the mobile terminal device 3 exchanges voice for a call with another terminal device through the mobile communication network, a digitized signal is transmitted from the mobile terminal device 3 to the voice processing device 5 and the digital mobile device. It is transmitted to the terminal device of the other party through the subscriber exchange 1 and the relay telephone line. Even when the mobile terminal device exchanges data with another terminal device through the mobile communication network, a digital signal is transmitted through the same path as the above voice. On the other hand, when accessing a web server or the like on the Internet from the mobile terminal device 3, the data is branched to the gateway device 2 side in the digital mobile subscriber exchange 1 and transmitted to the web server or the like via the Internet.

FIG. 2 is a block diagram showing the internal structure of the digital mobile subscriber exchange. As shown in FIG. 2, the digital mobile subscriber exchange 1 includes a signal processing unit 11, an exchange processing unit 12, a mobile station control unit 13 (control unit), and a situation monitoring unit 14.

Voice signals, data signals and control signals are multiplexed and sent from the terminal unit side to the digital mobile subscriber exchange 1. The signal processing unit 11 performs processing corresponding to each of these signals, and exchanges a voice signal to be transmitted to the other party on the network side, that is, via a relay telephone line and a control signal accompanying it. Handed over to section 12. Data to be directed to the Internet side (data network side) is transferred from the signal processing unit 11 to the gateway device. In addition, control signals relating to control of the mobile station (portable terminal device) are transmitted from the signal processing unit 11 to the mobile station control unit 1.
It is transmitted to 3. A typical example of the control signal passed to the mobile station control unit 13 is a signal indicating within which base station each mobile terminal device is located. On the contrary, the signal processing unit 1
1 multiplexes the voice signal and the control signal passed from the exchange processing unit 12, the data transferred from the gateway device 2 and the control signal passed from the mobile station control unit 13 to the destination mobile terminal device. Hand over to the base station for transmission.

The exchange processing unit 12 performs a process of distributing a voice signal or the like from the portable terminal device side to the relay system telephone line side or from the relay system telephone line side to the portable terminal device side according to the destination. When the mobile station control unit 13 receives the location registration request indicating in which base station the mobile terminal device is located, the mobile station control unit 13 registers the location registration request in the network as the mobile localized area information, and the mobile terminal device of the request source receives the location registration request. A response is returned. Situation monitoring unit 1
4 monitors the status of the Internet based on the information sent from the gateway device 2 and notifies the mobile station control unit 13 of the status. Mobile station controller 13
The mobile terminal device can be notified of the Internet status by including the information on the Internet status passed from the status monitoring unit 12 in the response to the location registration request.

FIG. 3 is a block diagram showing the internal structure of the portable terminal device. As shown in FIG. 3, the mobile terminal device 3
Is an antenna 31, a modulator / demodulator 32, and a signal processor 33.
A voice / digital signal converter 34, a controller 35,
An input unit 36, a display unit 37, a microphone 38,
And a speaker 39. The antenna 31 is used when transmitting / receiving a radio signal to / from a base station. The modulation / demodulation unit 32 modulates a voice signal, a data signal, and a control signal to be transmitted to the base station, and, on the contrary, demodulates into a voice signal, a data signal, and a control signal based on the signal received from the base station. The signal processing unit 33 passes the digitized voice signal passed from the voice / digital signal conversion unit 34, the data signal and the control signal passed from the control unit to the modulation / demodulation unit 33 for multiplexing and transmission. In addition, the received and demodulated signal is distributed to the audio / digital signal conversion unit 34 and the control unit 35 according to the contents thereof. voice/
The digital signal converter 34 converts the voice collected by the microphone 38 into a digital signal for transmitting to the base station side, and also converts the digitized voice signal sent from the base station side into voice. Speaker 39
Output to.

The control unit 35 controls the entire mobile terminal device 3 based on a key input or the like performed at the input unit 36, and exchanges necessary control signals with the base station side via the signal processing unit 33. Further, the control unit 35 performs control such that the display on the display unit 37 is changed according to the above-mentioned information on the Internet status received from the base station side. With such a configuration, it is possible to change the display on the display unit of the mobile terminal device based on the status of the Internet detected by the status monitoring unit in the digital mobile subscriber exchange.

Next, the details of the exchange between the gateway device, the digital mobile subscriber exchange, and the portable terminal device will be described. FIG. 4 is a sequence diagram showing an example of a processing procedure for notifying the mobile terminal device of the Internet status through the exchanges among the above devices. As indicated by A1 in FIG. 4, the gateway device transmits a normal operation notification to the digital mobile subscriber exchange at a predetermined time interval when the Internet condition is normal. Upon receiving this notification, the status monitoring unit of the digital mobile subscriber exchange recognizes that the Internet connection is normal, as indicated by A2.

On the other hand, the mobile terminal device uses A to register in which base station within the mobile communication network the mobile terminal device is located.
As indicated by 3 and A5, the location registration request is transmitted to the nearest base station at a predetermined time interval. In response to these, as indicated by A4 and A6, respectively, a response is returned from the mobile station control unit of the digital mobile subscriber network switch to the mobile terminal device side, and at this time, information on the current Internet status is added. When the responses A4 and A6 are returned, the digital mobile subscriber exchange recognizes that the Internet connection is normal, and therefore the information "normal" is added.

Here, when the gateway device detects that the Internet traffic has temporarily increased and is in a congestion state, the gateway device notifies the digital mobile subscriber exchange of the internet congestion as shown in A7. Send. By receiving this notification, the status monitoring unit of the digital mobile subscriber exchange recognizes that the Internet connection is abnormal, as indicated by A8. At this time, as shown in A9 and A11, when the location registration request is sent from the mobile terminal device to the digital mobile subscriber exchange, the mobile station control unit of the digital mobile subscriber exchange indicates A10 and A12, respectively. As described above, the information indicating "Internet abnormality" is added to the response and returned to the mobile terminal device side.

When the Internet is recovered from the congestion state, the gateway device detects this and sends a normal operation notice to the digital mobile subscriber exchange, as indicated by A13. Then, as shown in A14, the digital mobile subscriber exchange recognizes that the Internet connection has returned to the normal state. Therefore, after that, when the location registration request shown in A15 is sent from the mobile terminal device, as shown in A16, the information indicating "normal" is added from the digital mobile subscriber exchange to the mobile phone terminal device. Response is returned.

FIG. 5 is a sequence diagram showing another example of a processing procedure for notifying the mobile terminal device of the Internet status through the exchanges among the mobile terminal device, the digital mobile subscriber exchange, and the gateway device. B1 in FIG.
When the normal operation notification indicated by is sent from the gateway device to the digital mobile subscriber exchange, the digital mobile subscriber exchange recognizes that the Internet connection is normal, as indicated by B2. Then, when the location registration request as shown in B3, B5, B7 is sent from the mobile terminal device to the digital mobile subscriber switching system, the response with the information indicating "normal" added as shown in B4, B6, B8, respectively. Is returned to the mobile terminal device.

Here, after the digital mobile subscriber switching center receives the normal operation notification of B1, the next normal operation notification is still sent from the gateway device to the digital mobile subscriber switching center even if a preset predetermined time has elapsed. If it does not arrive and the time-out occurs, the digital mobile switching center recognizes that the Internet connection is abnormal, as shown in B9. Then, in response to the location registration request of B10 sent from the mobile terminal device at this time, as shown in B11, a response added with information indicating "Internet abnormality" is sent from the digital mobile subscriber switching system to the mobile terminal. Returned to the device.

Next, the case where the digital mobile subscriber exchange receives not only the notification of the Internet status from the gateway device installed in its own station but also the same notification from the exchange of another station will be described. FIG. 6 is a sequence diagram showing a procedure of communication among the mobile terminal device, the digital mobile subscriber exchange, and the gateway device in such a case. When the normal operation notification shown in C1 of FIG. 6 is sent from the gateway device to the digital mobile subscriber exchange, the digital mobile subscriber exchange recognizes that the Internet connection is normal, as shown in C2. And C3
When the location registration request shown in (4) is sent from the mobile terminal device to the digital mobile subscriber exchange, a response with information indicating "normal" is added to the mobile terminal device as shown in C4.

Here, congestion occurs on the Internet, and the abnormality is detected earlier before the congestion is detected by the gateway device shown in FIG. 6 and the Internet congestion notification shown in C9 is transmitted to the digital mobile subscriber exchange. When the notification of the Internet abnormality shown in C5 arrives at the digital mobile subscriber exchange from the exchange of the other station, the digital mobile subscriber exchange recognizes the abnormality of the Internet connection as shown in C6. After that, when the location registration request shown in C7 is sent from the mobile terminal device to the digital mobile subscriber exchange, the digital mobile subscriber exchange recognizing the abnormality as described above, as shown in C8, displays "Internet. A response to which information indicating "abnormal" is added is returned to the mobile terminal device. Also, in this state, the gateway device to the digital mobile subscriber exchange,
Even after the Internet congestion notification shown in C9 is sent, the digital mobile switching center still recognizes the abnormality of the Internet connection.

After that, when the Internet recovers from the congestion state, the notification of the Internet recovery arrives from the exchange of the other station as shown in C10, and the normal operation notification arrives from the gateway device as shown in C11, it shows in C12. Thus, the digital mobile switching center recognizes that the Internet connection has been established. Then, in response to the location registration request of C13 sent from the mobile terminal device thereafter, a response to which information indicating "normal" is added is returned as shown in C14.

As shown in FIG. 6, since the digital mobile subscriber switching center receives the notification regarding the Internet status from the switching center of the other station as compared with the case where only the gateway device installed in the local station receives the notification. It will be possible to detect the situation of the Internet more quickly. Also, it becomes possible for the mobile terminal device side to grasp the situation of the Internet more quickly.

Next, a display method on the portable terminal device side will be described. FIG. 7 is a schematic diagram showing the contents of screen display on the display unit of the mobile terminal device. FIG. 7A occupies the display content when the response to which the information indicating "normal" is added is received from the digital mobile subscriber exchange in response to the location registration request transmitted by the mobile terminal device.
As shown in FIG. 7A, the display unit 37 of the mobile terminal device 3
Includes a symbol 55 indicating the radio wave condition and a symbol 5 indicating the battery condition.
6 together with the symbol 5 showing the Internet status (normal)
1 is displayed. Further, FIG. 7 (b) occupies the display contents in the case where the position registration request transmitted by the mobile terminal device is received from the digital mobile subscriber exchange with a response added with information indicating "Internet abnormality". There is. As shown in FIG. 7B, the display unit 37 of the mobile terminal device 3 displays a symbol 52 indicating the Internet status (abnormality). That is, as described above, the mobile terminal device detects the web connection status based on the information sent from the digital mobile subscriber exchange, and displays differently in the detected status.

In this way, by displaying differently on the portable terminal device side depending on the situation of the internet, the user of the portable terminal device does not try to access a web server on the internet and the like, and the user of the internet can access the internet. It becomes possible to know the status such as congestion and failure, and the status of recovery from failure and the like. Further, by this, it is possible to further prevent unnecessary communication traffic from flowing in the event of a failure or the like.

The above-mentioned digital mobile subscriber exchange (1), gateway device (2), portable terminal device (3)
Are each configured using a computer. The above-described process of processing such as detection of the Internet status, notification of the status, control of display according to the notified content is stored in a computer-readable recording medium in the form of a computer program. The above process is performed by the computer reading and executing. Here, the computer-readable recording medium includes a magnetic disk, a magneto-optical disk, a CD-
ROM, DVD-ROM, semiconductor memory, etc.

The embodiments of the present invention have been described in detail above with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design etc. within the scope not departing from the gist of the present invention are also possible. included. For example, in the above embodiment, the information indicating the Internet status is included in the response to the location registration request sent from the mobile terminal to the digital mobile subscriber exchange. However, the same information can be transferred from the exchange side by other methods. You may make it notify to a terminal device side.

Further, for example, in the above-mentioned embodiment, the digital mobile subscriber exchange is made to detect the status of the Internet by the notification from the gateway device or the exchange of another station, but the Internet is monitored by another method. You may try to understand the situation.

Further, for example, in the above-mentioned embodiment, different symbols are displayed on the portable terminal device according to the Internet situation. However, in addition to this, the type of characters to be displayed is changed or the characters or symbols to be displayed are changed. It is possible to make the user aware of the Internet status by displaying in various ways, such as changing the color or displaying it in a blinking manner only when there is an abnormality.

In the above embodiment, the Internet connection in the mobile communication network has been described, but the present invention is not limited to this, and the present invention is applied to the Internet connection from the ordinary fixed telephone network to provide the telephone terminal or the like. Different displays may be displayed on the display device according to the Internet status.

[0044]

As described above, the communication device on the network side monitors the connection status of the Internet (data network) and transmits the connection status information to the terminal device side. It is possible to display it to inform. As a result, the user can accurately know the connection status, so that even if an abnormality or the like occurs, it is not necessary to repeatedly perform useless communication access to check the status, which improves usability. Therefore, it is possible to avoid a situation in which recovery from an abnormality is delayed due to unnecessary communication traffic flowing.

Further, according to the present invention, the status monitoring unit provided in the communication device receives the connection status information from the other communication device through the relay telephone line, and based on the connection status information, the control unit. Since the control information is transmitted to the terminal device side, not only the connection status is detected only in the communication device (switch) and the gateway device, but also the connection status detected in other stations is transmitted between the stations via the telephone network. Can be commonly recognized in. This makes it possible to display the status on the terminal device more quickly.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a mobile communication network according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a digital mobile subscriber exchange according to the embodiment.

FIG. 3 is a block diagram showing an internal configuration of a mobile terminal device according to the same embodiment.

FIG. 4 is a sequence diagram showing an example of an exchange procedure among the gateway device, the digital mobile subscriber exchange, and the mobile terminal device according to the same embodiment.

FIG. 5 is a sequence diagram showing another example of an exchange procedure between the gateway device, the digital mobile subscriber exchange, and the mobile terminal device according to the same embodiment.

FIG. 6 is a sequence diagram showing still another example of a procedure of communication between the gateway device, the digital mobile subscriber exchange, and the mobile terminal device according to the same embodiment.

7A and 7B are schematic diagrams showing display contents of the mobile terminal device according to the embodiment, FIG. 7A shows a case where the Internet status is normal, and FIG. 7B shows a case where the Internet status is abnormal.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Digital mobile subscriber exchange, 2 ... Gateway device, 3 ... Portable terminal device, 4 ... Base station control device (BC)
E), 5 ... Voice processing device (SPE), 6 ... Modulation / demodulation device (MDE), 7 ... Signal amplification device (AMP), 8 ... Antenna (ANT), 11 ... Signal processing unit, 12 ... Exchange processing unit,
13 ... Mobile station control unit, 14 ... Situation monitoring unit, 31 ... Antenna, 32 ... Modulation / demodulation unit, 33 ... Signal processing unit, 34 ... Voice /
Digital signal converter, 35 ... Control unit, 36 ... Input unit, 3
7 ... Display unit, 38 ... Microphone, 39 ... Speaker,
51 ... Design showing Internet status (normal), 52 ...
Design showing the Internet status (abnormal)

Continued front page    F term (reference) 5K027 AA11 BB01 CC08 FF02 FF22                       MM17                 5K067 AA33 BB04 BB21 EE02 EE10                       EE16 FF02 FF15 HH17 LL01                 5K101 KK02 LL12 NN18 PP00 TT02                       UU16

Claims (9)

[Claims] 1. A communication device which transfers data received from a terminal device side to a telephone network side and a data network side, and transfers data received from the telephone network side and the data network side to a terminal device side. A communication comprising: a status monitoring unit that monitors a connection status on the network side; and a control unit that transmits control information including information according to the connection status monitored by the status monitoring unit to the terminal device side. apparatus. 2. When the status monitoring unit receives notification information indicating an abnormality from a gateway device for connection with the data network side, the control unit controls the connection state to be abnormal. The communication device according to claim 1, wherein the communication device transmits information to the terminal side. 3. The control unit indicates that the connection status is abnormal when the status monitoring unit times out while waiting for a notification from a gateway device for connection with the data network side. The communication device according to claim 1, wherein the communication device transmits information to the terminal side. 4. The status monitoring unit receives connection status information from another communication device through a relay telephone line, and based on the connection status information, the control unit sends control information to the terminal device side. The communication device according to any one of claims 1 to 3, wherein: 5. The communication device is an exchange of a mobile communication network, and the control unit, when registering a position of a mobile station from a terminal device side, transmits control information including information on the connection status. It transmits to the terminal device side, It is characterized by the above-mentioned.
The communication device according to any one of 1 to. 6. A terminal device connectable to both a telephone network and a data network via a communication device, a display unit capable of displaying characters and symbols, and a connection status of the data network received from the communication device. And a control unit that controls the display unit to display different images according to the information of 1. 7. The terminal device is a mobile terminal device serving as a mobile station of a mobile communication network, and when the base station requests location registration, information on the connection status of the data network is sent from the base station. The terminal device according to claim 6, which is for receiving. 8. A mobile phone terminal device, which detects a web connection status and displays differently depending on the detected status. 9. A status display method in a communication system comprising a terminal device and a communication device for branching communication from the terminal device to a telephone network and the internet, wherein the communication device detects a situation of the internet. Depending on whether the received status indicates normal or abnormal at the terminal device, the first step of performing the first step, the second step of transmitting information including this status from the communication device to the terminal device. And a third step of displaying different screens.