JP3028936B2 - Digital cordless and digital telephone systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a digital cordless telephone system for performing digital communication, and more particularly to a digital cordless telephone system having a data communication service function.

[0002]

2. Description of the Related Art Conventionally, in a digital cordless telephone system in which data terminals such as personal computers are mutually connected and data communication is performed wirelessly, it is a general form to use a data terminal connected to a mobile terminal. .

[0003] Since the memory capacity of the mobile terminal is small, the mobile terminal is limited to a process of modulating and demodulating a radio signal and a process of only storing one frame of data (about 160 bits). This is because the stored data is transmitted and received and the data terminal processes the data.

As a prior art, Japanese Patent Application Laid-Open No. 8-19004
No. 9 will be described. In this publication, regarding the digital car telephone system standard RCR STD-27B, the mobile station A dials the mobile station B, and a radio channel failure occurs in the mobile station A before the partner mobile station B answers the incoming call. However, it describes an automatic recall setting method for recalling from the mobile station A to the mobile station B after recovery from the radio channel failure. In this automatic recall setting method, first, at the time of "call setting" from mobile station A, "transmission capability" information, "calling number" information, "calling number" information, "calling / receiving type" information, etc. are used for recall setting. The mobile device A stores the call setting information A in the storage means. Further, the mobile station B, which has received the "call setting" signal from the mobile communication network, transmits the call setting information A included in the "call setting" signal to the restriction of the transmission to a mobile station other than the mobile station in which the radio channel failure has occurred, or the occurrence of the radio channel failure. The information is stored in the storage means of the mobile station B for the purpose of restricting incoming calls from other than the mobile station.

[0005] Then, when the mobile station A first transmits the call setup information to the mobile communication network, the mobile station A receives a "call" signal from the mobile communication network, and before the mobile station B answers, the mobile station A layer. If the synchronization of 1 is lost and a time longer than the instantaneous interruption is passed, the radio channel of the mobile station A is abnormally released, and the call state transits to the idle state. Thereafter, a failure monitoring timer set in advance by the user A of the mobile station A is started, and when the radio channel fault is recovered during the startup of the failure monitoring timer, the mobile station A sets the call setup stored in the storage means. Based on the information A, a "call setting" signal B is generated and transmitted to the mobile communication network, so that the mobile station B automatically makes a call again. When the "call setting" signal B is generated, since the "calling / receiving type" of the call setting information A stored by the mobile device A is "outgoing", the "calling number" stored as the call setting information is referred to as "call number". "Calling number" is added to "Calling number" information in the "Setting" signal.
Is set in the “call destination number” information in the “call setting” signal.
Further, due to the abnormal release of the radio channel of the mobile device A, the base station of the mobile communication network in which the location of the mobile device A is registered recognizes the radio channel failure of the mobile device A, and the reason display information includes, for example, By transmitting a “disconnection” signal including “medium” to the mobile device B, preparations for starting the disconnection recovery procedure of the mobile device B are started.

[0006]

However, as described in the prior art, a mobile terminal generally stores only a small amount of data of about one frame used for data communication, and processes data. Since it is necessary for the terminals to perform the data communication, it is essential that the data terminals be connected to each other when performing data communication with each other using the mobile terminals.

Further, even if the data terminal makes an incoming call to an unconnected mobile terminal by data communication, the receiving mobile terminal cannot answer the call forever, and therefore the calling mobile terminal keeps calling forever. Therefore, when the data terminal is not connected to the mobile terminal, useless processing occurs on the calling side and the called side, and the use efficiency of the wireless channel is degraded.

Further, unlike the case of a failure such as a radio channel failure in the prior art, the present invention solves a situation where a data terminal connected to a mobile device is broken or disconnected, so that a call can be performed but data communication cannot be performed. To do so, it cannot be solved simply by storing the call setting information A, and the subject of the present invention and its solution are not described at all.

[Object of the Invention] An object of the present invention is to provide a data communication process until a data terminal is connected and a data communication service can be performed when a data terminal cannot be connected to a mobile terminal. Hold, and automatically execute data communication when the service function is restored,
An object of the present invention is to improve serviceability in data communication.

[0010]

When a mobile terminal to which a data terminal is not connected receives an incoming call by data communication, the calling process of the calling mobile terminal is interrupted, and the data terminal is terminated by the called mobile terminal. Is detected.

Next, when the connection of the data terminal is detected by the called mobile terminal, that is, when data communication is possible, the calling mobile terminal makes a call for requesting data from the exchange, In addition, the exchange makes a request for an automatic response to the mobile terminal that has originated the data communication call,
Data communication is enabled by connecting both mobile terminals.

More specifically, a digital cordless telephone system according to the present invention is a digital cordless telephone system comprising a radio base station, a mobile terminal, and an exchange for controlling the radio base station. And means for transmitting and receiving data communication other than voice communication.

[0013] Further, the mobile terminal in the digital cordless telephone system is characterized in that the mobile terminal includes means for identifying the type of information as to whether the content of the call signal is a data communication or a voice signal. Further, the mobile terminal includes a detecting unit for detecting connection or non-connection of the data terminal, and an automatic calling unit when the connection is detected. Further, the mobile terminal is provided with display means for holding a call of a calling party and displaying a message on a display unit of the mobile terminal when receiving an incoming call by data communication when the data terminal is not connected. . Further, the exchange is provided with control means for registering the telephone number of the calling side and performing a re-call.

Further, the digital telephone system of the present invention comprises:
In a digital telephone system configured by a base station and a terminal, and an exchange controlling the base station, the terminal is a connection unit that connects a data terminal together with a telephone call unit,
Means for transmitting and receiving data communication other than a voice call, and a detecting means for detecting connection with the data terminal.

Further, in a digital telephone system constituted by an exchange and a plurality of terminals and exchanging communications between the terminals, the exchange registers a telephone number of a calling side by the terminal and a control means for making a re-call. Comprising a voice communication unit, a connection unit for connecting a data terminal, a switching unit for switching between voice communication and data communication,
It is characterized in that it comprises a detecting means for detecting a disconnection with the data terminal.

[Operation] Even when a mobile terminal to which no data terminal is connected receives an incoming call by data communication, data communication can be timely performed, and there is an effect of improving serviceability in using data communication. . In other words, when the caller terminal is not connected, the caller terminal recognizes that the called side has been connected and is in a response state, and can automatically perform a recall, and the exchange has a small storage capacity and the caller terminal has a small storage capacity. And the receiving terminal can be easily connected in a short time, and as a result, the operability service can be improved.

The terminal detects whether the data terminal is connected or not connected. If the data terminal is not connected, the terminal issues a warning to that effect to urge the data terminal to receive the data. Can be quickly downloaded to a large-capacity storage means.

[0018]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system configuration diagram of a digital cordless telephone system according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a mobile terminal and a data terminal in one embodiment of the present invention, and FIG. 3 is a sequence diagram of call control by data communication in one embodiment of the present invention.

First, a digital cordless telephone system according to the present invention will be described with reference to FIG. In a digital cordless telephone system, a connection device connected to a subscriber line drawn from a telephone station such as a relay station (not shown) is placed, and the telephone and the connection device are connected by radio waves. There are an analog system and a digital system, and the digital system is widely used under the name of PHS. The present invention can be applied not only to the PHS system but also to an analog system, a car phone, and a mobile phone. By the way, PH
In the case of S, various uses such as cordless in a short distance such as a transceiver for indoor use, in an office connected to a PBX, for outdoor public use, and the like are being attempted. The specifications of the PHS include a 1.9 GHz radio frequency band, a TDMA radio line, a 280 kHz frequency interval, and a 32 kbit / sec voice coding scheme, and a 32 kbit / s transmission rate for high-speed data transmission and facsimile transmission. Bits / second are multiplexed to enable interconnection with ISDN at a transmission rate of 128 kbits / second.

Because of these specifications, the exchange body 1 shown in FIG. 1 includes an indoor base station in an office, an outdoor base station, and the like as part of the PBX, and is connected to a large capacity relay station or a small capacity relay station. Thus, data communication with another telephone is enabled.

In the exchange body 1, a carrier frequency and a time slot in each carrier frequency are allocated, and a time division switch (TDSW) 2 having a function of a switcher is matched with input / output communication data between the radio base station. It comprises a radio base station interface 3, a storage unit 4 for storing program software and data for supplementing temporary communication, and a main control unit 5 for controlling the entire switch body 1.
In addition, the digital cordless telephone system includes not only an exchange body 1, a plurality of wireless base stations 6 connected to the exchange body 1 by wire, and a voice call with the wireless base station 6,
It comprises a plurality of mobile terminals 7 having a data terminal 8 and capable of data communication.

More specifically, the main control unit 5 in the exchange body 1 controls the radio base station interface units 3 # 1, # 2 and the TDSW2. The calling information transmitted from the mobile terminal 7 by a radio signal includes the radio base station 6,
It is sent to the main control unit 5 through the wireless base station interface unit 3. Similarly, control information output from the main control unit 5 is transmitted to the mobile terminal 7 by a radio signal through the radio base station interface unit 3 and the radio base station 6. Also, TDS
W2 is a digital signal time division control switch (Time Div.
itional SWitch), and controls the switching of the communication path between the wireless base station interfaces 3.
The storage unit 4 is a memory that stores data of the main control unit 5.

Next, an outline of the data communication operation will be described. A data terminal 8 # 1 for data communication is connected to the mobile terminal 7 # 1, while a data terminal 8 # 2 is connected to the mobile terminal 7 # 2. Data terminal 8 # 1
When the data communication operation is performed at, the process of calling the mobile terminal 7 # 1 is started. The mobile terminal 7 # 1 sends outgoing call information for calling the other party's mobile terminal 7 # 2 by activating the calling process to the main base station in the exchange 1 through the radio base station 6 # 1 and the radio base station interface unit 3 # 1. Send to control unit 5.

The main controller 5 sends out incoming data communication information to the mobile terminal 7 # 2 through the radio base station interface 3 # 2 and the radio base station 6 # 2 based on the call information. The mobile terminal 7 # 2 sends the data communication incoming information to the data terminal 8 # 2 based on the incoming information. When the data terminal 8 # 2 responds, the mobile terminal 7 # 2 notifies response information to the main control unit 5. Main control unit 5 is TDSW
2 and the communication paths between # 1 and # 2 of the radio base station interface unit 3 are connected, and the communication paths between the data terminals 8 # 1 and # 2 are connected. Data communication between # 2 becomes possible.

Now, consider the case where the data terminal 8 # 2 is not connected to the mobile terminal 7 # 2 at this time. Since the data terminal 8 # 2 is not connected to the mobile terminal 7 # 2, the mobile terminal 7 # 2 cannot respond forever, and the calling mobile terminal 7 # 1 continues to wait for a response forever. .

Next, the control operation of the mobile terminal 7 when the data terminal 8 is not connected will be described with reference to FIG. First, according to FIG. 2, the control unit 14 in the mobile terminal body 10 has a transmission / reception unit to detect and demodulate a slot assigned to itself, and modulate and insert voice or data into a predetermined slot for transmission. , A communication path switching unit 12 for switching between voice signals and communication data and switching between transmission and demodulation, and a voice signal processing unit 13 for encoding the voice to be transmitted to the receiver. , And a small-capacity storage unit 15 for storing an operation program of the control unit and temporary data.
7 to detect connection or non-connection of the data terminal 18 and display control of the display unit 16.

The incoming information of the radio signal transmitted from the radio base station 6 is transmitted to the control unit 14 through the antenna 20 and the radio unit 11. In the incoming call information, the type of information indicating whether the type of data is voice communication or data communication is indicated. When the information type is voice communication, the control unit 14 controls the communication path switching unit 12 and connects the wireless unit 11 and the voice signal processing unit 13. Similarly, when the information type is data communication, the control unit 14 connects the wireless unit 11 and the data terminal connection unit 17.

With the above control, when the information type is voice communication, voice communication between the microphone 21 and the receiver 22 becomes possible. If the information type is data communication, the signal received by the radio unit 11 is demodulated at a high-frequency signal level, and the demodulated signal is transmitted to the data terminal connection unit 1 via the communication path switching unit 12.
7 to be sent to the data terminal 18 via the connection cable 19. Similarly, the data signal transmitted from the data terminal 18 is transmitted from the data terminal connection unit 17 via the connection cable 19 to the radio unit 11 after modulating the radio frequency via the communication path switching unit 12, and transmitted via the antenna 20. To the base station 6.

The control unit 14 can detect the connection of the data terminal 18 through the connection cable 19. In this detection, if the connection cable has a power line, the current of the power line is detected, or a micro switch is mechanically provided at the connection part,
Alternatively, a non-connection / connection detection terminal is assigned to one input terminal of the CPU of the control unit 14, and when not connected, a circuit is configured to be lifted up by a pull-up and to be pulled down to a pull-down value when connected. However, it is possible to detect connection or non-connection by other methods. The display unit 16 has a display function of displaying characters such as a telephone number and a time of a communication partner by the control unit 14.

Here, the operation when the data terminal 18 is not connected will be described with reference to FIG.

The calling information of the data communication originated from the mobile terminal 7 # 1 is (a) transmitted via the exchange 1 to the mobile terminal 7 # 2.
(B). The mobile terminal 7 # 2 detects the data terminal 8 # 2 described above (c), and when the data terminal 8 # 2 is connected (FIG. 3).
(C) (yes) performs the data communication process described above (d), but when the data terminal 8 # 2 is not connected (no in FIG. 3 (c)), the mobile terminal 7 # 2 Sends (e) the response information of the "transmission hold request" to the exchange 1, and causes the mobile terminal 7 # 1 to register a state history indicating that data communication is held in the internal storage unit 15.

Further, the mobile terminal 7 # 2 controls the display unit 16 to display a message indicating that a data communication has been received, activates the detection of the data terminal connection unit 17, and activates the data terminal 8 #. 2 is connected. At this time, it is possible not only to display the message on the display unit 16 but also to issue a warning sound such as “Data terminal is not connected” from the receiver.

On the other hand, based on the response information of the "transmission hold request" (e), the main control unit 5 of the exchange 1 in FIG.
Send a "call stop request" command to 1 (f)
At the same time, the number of the calling terminal is registered in the storage unit 4 (h).

The mobile terminal 7 # 1 that has received the "call stop request" command stops the calling process of data communication sent to the mobile terminal 7 # 2, and enters a reception standby state ( g).

Here, when the user of the mobile terminal 7 # 2 recognizes the display contents of the display unit 16 and connects the data terminal 8 # 2 to the mobile terminal 7 # 2 (i), the control of the mobile terminal 7 # 2 is performed. Part 1
4 detects the connection of the data terminal 8 # 2.
Reference numeral 4 further reads the storage unit 15. Since the status history of the storage unit 15 contains the contents of which the data communication is suspended, the control unit 14 sends a call for a data request to the exchange 1 (j). In response to this call request, exchange 1
The main control 5 refers to the calling number registered in the storage unit 4 (k), and sends an automatic response request to the mobile terminal 7 # 1 (l).

As a result, the mobile terminal 7 # 1 prepares for an automatic response (m) and sends a response signal to the exchange 1 (n). Simultaneously with this response, the main control unit 5 of the exchange 1 controls the TDSW 2, connects the communication paths between the mobile terminals 7 # 1 and # 2, and sends a response signal to the mobile terminal 7 # 2 (o).

In a state where both communication paths are connected, a data request is started from the data terminal 8 # 2 to the data terminal 8 # 1 (p), and the data communication control which has been suspended is started. (Q). With this procedure, data can be transmitted from the mobile device 7 # 1 to the mobile device 7 # 2. At this time, since the line is connected, data can be transmitted from the mobile station 7 # 2 to the mobile station 7 # 1 next. #
2, the data can be easily transmitted. Thus, data transmission and reception are easily performed.

When the data terminal 8 is connected to both the mobile device 7 # 1 and the mobile device 7 # 2, the data communication process is performed in step (d) as described above. In this data communication process, the mobile station 7 # 2 sends a response signal to the mobile station 7 # 1 via the exchange 1, and then data is sent from the mobile station 7 # 1, and the mobile station 7 # 2 The data is received and stored in the large-capacity storage means in the data terminal 8 # 2.

When the data request from the mobile unit 7 # 2 to the effect that the data terminal has been connected has not reached the exchange 1 for a considerable period of time, that is, in such a case, the exchange 1 or the mobile unit 7 # 1 After outputting a call request for data communication, a timer may be started to measure a predetermined time, the data request may be canceled, and then a request for data communication may be issued again from the exchange 1 or the mobile station 7 # 1. . For this time, for example, if the call setting information is held together with the outgoing data communication as in Japanese Patent Application Laid-Open No. Hei 8-19049 shown in the prior art, the re-call setting is performed, and the re-call setting is performed. No need for complicated procedures.

Further, as described above, the present invention is not limited to a so-called digital cordless telephone system, but may be any communication system that enables voice communication and data communication and that can connect a data communication terminal. Applicable enough.

[0042]

According to the present invention, the connection status of the data terminal is monitored, and even when the data terminal is not connected to the mobile terminal, the indication of the non-connection is displayed to prompt the connection of the back data terminal, and the re-call is performed. By performing the control processing of the processing, the response processing is automatically performed, and the data transmission can be performed. In addition, even if the mobile terminal of the data communication partner is not ready to perform data communication without preparing a special hardware mechanism in the system, data communication can be enabled in a timely manner. This has the effect of improving serviceability.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a digital cordless telephone system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a mobile terminal and a data terminal according to an embodiment of the present invention.

FIG. 3 is a sequence diagram of call control by data communication in one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switch body 2 TDSW 3 Radio base station interface part 4 Storage part 5 Control part 6 # 1, 6 # 2 Radio base station 7 # 1, 7 # 2 Mobile terminal 8 # 1, 8 # 2 Data terminal 10 Mobile terminal main body 11 Radio unit 12 Call path switching unit 13 Audio signal processing unit 14 Control unit 15 Storage unit 16 Display unit 17 Data terminal connection unit 18 Data terminal 19 Connection cable 20 Antenna

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 7/24-7/26 H04L 11/00 H04M 3/42 H04M 11/00-11/10 H04Q 7 / 00-7/38

Claims (6)

(57) [Claims] 1. A digital cordless telephone system comprising a radio base station, a mobile terminal, and an exchange for controlling the radio base station, wherein the mobile terminal connects a data terminal and transmits and receives data communication other than a voice call. a means for said and means for outputting a transmission suspension request when not connected to the data terminal if there is data communication destination <br/> call, the exchange, in response to the transmission suspension request A digital cordless telephone system, comprising: a control unit for registering a telephone number of a calling side by calling the mobile terminal and recalling the calling side when a data terminal is connected to the mobile terminal. 2. The digital cordless telephone according to claim 1, wherein the mobile terminal in the digital cordless telephone system includes a unit for identifying an information type of the content of the call signal as a data communication or a voice signal. Phone system. 3. The mobile terminal according to claim 1, wherein the mobile terminal in the digital cordless telephone system includes a detecting unit for detecting connection and non-connection of the data terminal, and an automatic calling unit when the connection is detected. Digital cordless telephone system. 4. The mobile terminal in the digital cordless telephone system, when receiving an incoming call due to data communication without a data terminal being connected, holds a call from a calling party and displays a message on a display unit of the mobile terminal. The digital cordless telephone system according to claim 1, further comprising a display unit. 5. A digital telephone system comprising an exchange and a plurality of terminals, said terminal comprising: a connection unit for connecting a data terminal together with a voice communication unit; a switching unit for transmitting and receiving data communication other than a voice communication; Detecting means for detecting data terminal and connection non-connection, and means for outputting a transmission hold request to the exchange when the data terminal is not connected when there is an incoming call for the data communication, wherein the exchange is A digital telephone system comprising: a control unit for registering a telephone number of a calling side in response to the transmission hold request and performing a re-call to the calling side when a data terminal is connected to the terminal. . 6. An exchange comprising a switch and a plurality of terminals,
In the digital telephone system for exchanging communication between the terminals, the terminal includes a voice communication unit, a connection unit that connects a data terminal, a switching unit that switches between voice communication and data communication, and a connection that is not connected to the data terminal. And a means for outputting a transmission hold request to the exchange when there is no connection with the data terminal when there is an incoming call for the data communication, wherein the exchange holds a transmission hold by the terminal. Control means for registering the telephone number of the calling side in response to the request, and calling the telephone number of the calling side to make a call again when the terminal is called when connected to the data terminal Wherein the calling terminal automatically responds.