JPH07203538A - Digital cordless phone - Google Patents

Abstract

(57) [Abstract] [Purpose] After the automatic disconnection of the cordless handsets of the digital cordless telephone within the time limit, the user saves the troublesome work of making another call if he wants to call again. In addition, when the call is received again from the same party after the automatic disconnection, the user does not have to make another response if he wants to call again. [Structure] The other party's ID storage device 5 that stores the ID number of the other party's phone that was communicating before disconnection, and a certain time after automatic disconnection can be measured to notify other devices of the end of measurement. A time measuring device 2 which can be used, and an automatic transmission signal transmitting device for the partner handset having the ID number stored in the partner handset ID storage device by the notification of the end of measurement from the time measuring device after the automatic disconnection. The automatic transmission starting device 3 for starting is provided. Further, when the incoming signal detecting device detects an incoming call after the automatic disconnection, if the incoming call is from the other handset device stored in the other handset device ID storage device, the response signal transmitting device is automatically activated. A response activation device is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital cordless telephone, and more particularly to improvement of direct communication between handsets thereof.

[0002]

2. Description of the Related Art A communication channel search method for direct communication between handset units, which is described in the second generation cordless telephone system standard (draft), will be described below. In addition, PS (PERSONAL STATION ...
-The same CS (CELL S
It is limited to PSs registered in (TATION ... parent device) (system call codes recognized by PS are the same). FIG. 3 is an explanatory diagram of a control sequence for direct communication between handset units, which is described in the second generation cordless telephone system standard (draft). In FIG. 2, the calling side PS (PS that calls the other party PS to make a direct call between handset units) is a carrier defined by this standard (draft) in order to detect an empty slot of the carrier for direct call between handset units. After sensing and confirming that the carrier is available (vacant), the calling signal a is transmitted to the other party of the carrier who wants to talk at the slot timing. In this call signal, in addition to SS (start symbol), PR (preamble bit), UW (unique word), and CI (channel identification), a system call code (provided for each private CS for every 42 CS) is provided as a destination identification code 42 bits. 29-bit unique number) and 13-bit PS calling number (PS calling number of partner),
The transmission side PS calling code (PS
-ID) is included. On the other hand, when the PS on the called side (PS that receives a call from another PS) is in a call waiting state for a direct call between handset units, a call signal to the local station is transmitted by sequentially searching for carriers for direct call between handset units. Not looking for. After the receiving side PS receives the calling signal a containing the PS calling number of its own station, it transmits the synchronizing signal b to the calling side PS at slot timing 2.5 ms after receiving the calling signal. After that, the originating PS, which has received the synchronizing signal b from the terminating PS, transmits the synchronizing signal c. The receiving PS, which has received the synchronization signal c from the transmitting PS, transmits the response signal d when the user presses the response button. After that, the TCH idle burst signals e and f are exchanged to perform a call operation. And in the case of a call, 3 after the call
Within minutes, and in the case of a response, if the call limit time defined as within 3 minutes after the response elapses, the disconnection processing must be performed to release the wireless resource.

[0003]

However, in the inter-slave communication in the above-mentioned conventional digital cordless telephone, since the call time is limited, the user makes a call if the call time limit elapses regardless of his or her will. However, if the user disconnects and wants to talk to the other party again, the user has to make a call again to the same child device after the stipulated time of 2 seconds or more has elapsed. In addition, when the user wants to continue talking with the same person, he or she has to bother with the response operation even if the same person receives an incoming call.

[0004]

SUMMARY OF THE INVENTION In order to solve the problems of the conventional digital cordless telephone set, the present invention provides a digital cordless telephone set with respect to another digital cordless telephone set having a specific ID number. Transmission signal transmitting means for transmitting a transmission signal, a response signal detecting means for detecting a response signal from the other handset, a connection control means for connecting a communication path, and after a lapse of a fixed time after transmitting the transmission signal Automatic disconnection means for automatically disconnecting the communication path, partner slave ID storage means for storing the ID number of the partner slave that was talking before disconnection, time measurement after automatic disconnection and a certain time has elapsed The time measuring means for notifying the end of the post-measurement, and the other handset having the ID number stored in the other handset ID storage means by the notification of the end of measurement from the time measuring means after the automatic disconnection It is provided with a with an automatic transmission start means for starting the calling signal transmitting means automatically.
Further, an incoming signal detecting means for detecting an incoming signal from another digital cordless telephone slave unit, a response signal transmitting means for transmitting a response signal to the partner slave terminal, and a connection control means for connecting a communication path, Automatic disconnecting means for automatically disconnecting the communication path after a certain period of time has elapsed after transmitting the response signal, and partner handset ID storage means for storing the ID number of the partner handset that was communicating before the disconnection. When the incoming signal detecting means detects an incoming call after the automatic disconnection,
An automatic response activation means for automatically activating the response signal transmission means in case of an incoming call from the partner slave stored in the storage means is provided.

[0005]

Since the digital cordless telephone handset in the digital cordless telephone according to the present invention has the above-mentioned configuration, even if the automatic disconnection process is performed within the call limit time of 3 minutes or less, the specified time of 2 seconds or more elapses. For example, it is possible to automatically re-send to the same partner child device. Also,
After the automatic disconnection process is performed according to the call time limit, if a call from the same partner's handset is detected, a response signal can be automatically sent and a call can be made again. Although it is interrupted, after the specified time, the call can be made again with the same partner mobile device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital cordless telephone according to the present invention will be described below with reference to FIGS.

<First Invention> FIG. 1 is an example of a block circuit diagram of a digital cordless telephone handset in a digital cordless telephone according to the present invention. In FIG. 1, 1 is an automatic disconnecting device, 2 is a time measuring device, 3 is an automatic transmission starting device, 4 is a main control device, 5 is a partner telephone ID storage device, 6
Is a connection control device, 7 is a transmission signal transmission device, 8 is a response signal detection device, 9 is a digital radio device, 10 is a handset, and 1 is a handset.
1 to 23 are signal lines, 24 is an antenna, and 25 is a radio wave.

First, the operation from the call to the call and the automatic disconnection operation will be described with reference to FIG. When the user makes a call to another child device, the main controller 4 uses the signal line 18
At the same time as sending the activation signal to the transmission signal transmission device 7 via the, the automatic disconnection device 1 is notified via the signal line 13 that the transmission has been activated. The transmission signal transmitting device 7 transmits a transmission signal to the digital wireless device 9 via the signal line 21. The digital wireless device 9 puts a transmission signal on the radio wave 25 using the antenna 24 and starts transmission. The digital wireless device 9 which receives the response signal from the telephone of the calling party on the radio wave 25 and is received by the antenna 24
Sends the received signal to the response signal detection device 8 via the signal line 23. If the response signal detection device 8 detects that the received signal is a response signal from the calling party telephone,
The main control unit 4 is notified via the signal line 19 that there is a response. The main control unit 4 commands the connection control unit 6 via a signal line 17 to connect a call. The connection control device 6 connects the signal line 20 and the signal line 21 in accordance with the command, thereby connecting the handset 10 and the digital wireless device 9, and as a result, a wireless communication line is connected. Further, the automatic disconnection device 1 notified of the activation of the transmission from the main control device 4 at the time of activation of the transmission starts measuring the time from the time when the notification is received, and when the call time limit is reached, the signal line 1
A request for disconnecting the call is made to the main control unit 4 via 3. The main control device 4 requests the connection control device 6 to disconnect the communication line via the signal line 17, and the connection control device 6
Disconnects the signal line 20 and the signal line 21. The digital radio device 9 stops the radio wave 25 when there is no signal to be transmitted.

Although the above operation is the same as the operation of the handset call in the conventional digital cordless telephone, the automatic call operation of the present invention will be described below with reference to FIG. When activating the automatic disconnection, the automatic cutting device 1 requests the time measuring device 2 to measure the time via the signal line 11. The main control device 4 also stores the ID of the calling partner device in the partner device ID storage device 5 via the signal line 16. The time measuring device 2 performs a certain specified time measurement, and when the measurement is completed, the time measurement device 2 notifies the automatic transmission activation device 3 of the end of the time measurement via the signal line 12. The automatic transmission activation device 3 reads the partner ID of the partner using the signal line 15 and
Requesting the main controller to re-transmit using the partner ID. The main controller 4 sends a start signal to the transmission signal transmitter 7 via the signal line 18. The transmission signal transmitting device 7 transmits a transmission signal to the digital wireless device 9 via the signal line 21. The digital wireless device 9 puts a transmission signal on the radio wave 25 using the antenna 24 to start transmission, and the re-transmission operation is completed. According to the above configuration, after the automatic disconnection process is performed by the call time limit of 3 minutes or less, the redialing can be automatically made to the same partner slave unit after the stipulated time of 2 seconds or more elapses.

<Second Invention> FIG. 2 is an example of a block circuit diagram of a digital cordless telephone handset in the digital cordless telephone of the present invention. In FIG. 2, 31
Is an automatic disconnection device, 32 is an automatic response activation device, 33 is a main control device, 34 is a partner ID storage device, 35 is a handset, 36 is a connection control device, 37 is a response signal transmission device, 3
8 is an incoming signal detection device, 39 is a digital wireless device, 40
˜50 is a signal line, 51 is an antenna, and 52 is a radio wave. First, the operation from the incoming call to the call and the automatic disconnection operation will be described. Incoming signal from other handset is radio wave 52
When the digital wireless device 39 is received by the digital wireless device 39 via the antenna 51, the digital wireless device 39 receives the signal line 40.
The received signal is sent to the incoming signal detecting device 38 via. If the incoming signal detection device 38 can detect that the received signal is an incoming signal to itself, it notifies the main control device 33 via the signal line 46 that there is an incoming call. The main control unit 33 requests activation of the response signal transmitting unit 37 via the signal line 45 when the user responds. The response signal transmitting device 37 requests the digital wireless device 39 to transmit the response signal via the signal line 49, and the digital wireless device 39 uses the antenna 51 to put the response signal on the radio wave 52. Send. Further main controller 3
Reference numeral 3 instructs the connection control device 36 to connect the call via the signal line 44, and at the same time notifies the automatic disconnection device 31 via the signal line 40 that the call is connected. The connection control device 36 receives the signal line 47 and the signal line 4 according to the command.
8 is connected to connect the handset 35 and the digital wireless device 39, and as a result, a communication line through wireless communication is connected. Further, the automatic disconnection device 31 notified from the main control device 33 that the call is connected starts measuring time from the time of receiving the notification, and when the call time limit is reached, the main control device via the signal line 40 The device 33 is requested to disconnect the call. The main control unit 33 requests the connection control unit 36 to disconnect the communication line via the signal line 44, and the connection control unit 36 disconnects the connection between the signal line 47 and the signal line 48. The digital radio device 39 stops the radio wave 52 when there is no signal to be transmitted.

The above-described operation is the same as the operation of the handset communication in the conventional digital cordless telephone handset, but next, the operation of automatic response in the digital cordless telephone handset of the present invention is shown in FIG. It will be explained based on. The main controller 33, which is requested by the automatic disconnecting device 31 to activate the automatic disconnection, stores the partner slave unit ID in the partner slave unit ID storage device through the signal line 43. Next, when there is an incoming call, the main control unit 33 sends an incoming call signal to the automatic response starting unit 32 via the signal line 41. The automatic response activation device 32 reads the ID stored in the partner child device ID storage device 34 using the signal line 42,
It collates with the ID in the incoming signal. If the IDs match,
The automatic response activation device 32 requests the main control device 33 to respond via the signal line 41. The main controller 33 requests activation of the response signal transmitter 37 via the signal line 45. The response signal transmitting device 37 requests the digital wireless device 39 to transmit the response signal via the signal line 49, and the digital wireless device 39 uses the antenna 51 to put the response signal on the radio wave 52. Send. Further, main controller 33 commands connection controller 36 via signal line 44 to connect the call. The connection control device 36 connects the signal line 47 and the signal line 48 in accordance with the command, thereby connecting the handset 35 and the digital wireless device 39, and as a result, a wireless communication line is connected. According to the above configuration, after performing the automatic disconnection process according to the call time limit, it is possible to automatically send a response signal and make a call again when an incoming call from the same partner's handset is detected. Although the call is interrupted for the specified time, after the specified time, the call can be made again with the same partner mobile device.

[0012]

According to the present invention, a call between digital cordless telephone handsets is automatically redialed to the same partner telephone after waiting a specified time even if the call is automatically disconnected due to the call limit time. As a user, after the automatic disconnection, when the user wants to talk with the same person again, he / she can save the trouble of making a redial call again, and the trouble is eliminated. In addition, if there is an incoming call from the same party after the call is automatically disconnected due to the call time limit, the user will automatically answer the call. Disappear.

[Brief description of drawings]

FIG. 1 is an example of a block circuit diagram in a slave unit of a digital cordless telephone of a first invention of the present invention.

FIG. 2 is an example of a block circuit diagram in a slave unit of the digital cordless telephone of the second invention of the present invention.

FIG. 3 is an explanatory diagram of a control sequence of a direct call between handset units, which is described in a second generation cordless telephone system standard (draft).

[Explanation of symbols]

 1, 31 Automatic disconnecting device 2 Time measuring device 3 Automatic transmission starting device 4, 33 Main control device 5, 34 Other telephone ID storage device 6, 36 Connection control device 7 Transmission signal transmission device 8 Response signal detection device 9 Digital wireless device 32 Automatic response activation device 37 Response signal transmission device 38 Incoming signal detection device

Claims (2)

[Claims] 1. A digital cordless telephone that transmits and receives digital signals using a digital modulation method through a wireless propagation path, and transmits a transmission signal to another digital cordless telephone handset having a specific ID number. A signal transmitting means, a response signal detecting means for detecting a response signal from the partner's handset, a connection control means for connecting a call path, and a call path being automatically disconnected after a lapse of a certain time after transmitting a call signal. And the other handset I that stores the ID number of the other handset that was talking before the disconnection.
D storage means, time measurement means for performing time measurement after automatic disconnection and notifying the end of measurement after a lapse of a fixed time, and storing in the partner slave device ID storage means by notification of measurement end from the time measurement means after automatic disconnection A digital cordless telephone handset, comprising: a digital cordless telephone handset having automatic transmission start means for automatically starting the transmission signal transmission means for the partner handset having a certain ID number. 2. In a digital cordless telephone that transmits and receives a digital signal using a digital modulation method through a wireless propagation path, an incoming signal detection means for detecting an incoming signal from another digital cordless telephone handset, and the other party. Response signal transmitting means for transmitting a response signal to the machine,
Connection control means for connecting the communication path, automatic disconnection means for automatically disconnecting the communication path after a certain time has elapsed after transmitting the response signal, and ID of the partner handset that was communicating before the disconnection
When the incoming call signal detecting means detects the incoming call after the automatic disconnection and the remote handset ID storage means for storing the number, it is an incoming call from the remote handset stored in the remote handset ID storage means. A digital cordless telephone having a digital cordless telephone handset having automatic response starting means for automatically starting the response signal transmitting means.