JPH0479620A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To prevent the occurrence of errors at the time of connecting by making plural connecting devices which are made to correspond to plural radio telephone sets one to one to respectively store and select the communication channels to be used between the plural radio telephone sets. CONSTITUTION:At the time of installing this cordless telephone system, contents of communication channels selectable by each connecting device 3 are first stored in a channel memory 36 from the setting switch 35 of each device 3 through a control circuit 33 so that the contents can be different from each other. When a talk key 45 of a radio telephone set is pressed under such condition, the pressed content is sent to the connecting device which is made to correspond to the telephone set 4 through a control circuit 44 and radio circuit 41 from an antenna 49. When the radio circuit 32 of the device 3 receives the content, the information about a vacant communication channel stored in the memory 36 is outputted and connected to the originating radio telephone set 4 under the control of the control circuit 33.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cordless telephone device in which a main device is connected to a plurality of connecting devices by wire, and each connecting device is wirelessly connected to each wireless telephone on a one-to-one basis.

2. Description of the Related Art Conventionally, in a cordless telephone device in which a plurality of connection devices are connected by wire to a main device, and each connection device and each wireless telephone are wirelessly connected to 111, wireless communication between the wireless telephone and the connection devices has been carried out. If communication is to be performed, an empty channel is selected from among the wireless communication channels set for a plurality of channels for communication.

FIG. 2 is a block diagram showing the overall configuration of a cordless telephone device in which a plurality of connection devices are connected by wire to a main device, and each connection device and each wireless telephone are wirelessly connected one-to-one.

In FIG. 2, l is a telephone line connected to a fixed telephone If (not shown), 2 is a main device to which the telephone line 1 is connected, controls the entire cordless telephone and forms a communication path, and 3 is a main device connected to a fixed telephone Iff (not shown); , is a connection device as a wireless transmitter/receiver that is connected to the main device 2 by wire.

4 is a wireless telephone that performs wireless communication with the connecting device 3, and the wireless telephone 4 and the connecting device 3 are arranged in a plurality of pairs (hereinafter referred to as locations I to N) in one-to-one correspondence. It consists of

FIG. 3 shows the conventional cordless telephone device.
2 is a block diagram showing a specific configuration of a connection device 3 and a wireless telephone 4. FIG.

In the connection device 3 in FIG. 3, 31 is a telephone interface circuit for performing data communication and communication path formation with the main device 2, and 32 is a transmitting/receiving unit (for performing wireless communication with the wireless telephone 4). (not shown).

33 is a control system for controlling the entire connecting device 3, such as switching the transmission/reception of the radio circuit 32, changing the transmission/reception frequency, and the transmission formats of the main device 2 and the wireless telephone 4 (transmission signal processing, etc.). The circuit 34 is an antenna that performs wireless transmission and reception.

On the other hand, in the radio telephone 4 in FIG. This is a telephone communication circuit that processes the transmitting signal and the receiving signal.

Further, in the wireless telephone 4, 43a is a receiver;
3b is a transmitter; 44 is a control circuit that performs overall control of the radio telephone 4, such as switching between transmission and reception of the radio circuit 41, changing the transmission and reception frequency, and processing transmission signals based on the transmission format of the pairing device 3; 45; 46 is an end key that is pressed when the call ends. 47 is a dial key. 48 is a ring that rings when a call is received. 49 is an antenna that performs wireless transmission and reception.

Next, the operation of the conventional cordless telephone device having the above configuration will be explained.

Generally, wireless communication between the connecting device 3 and the wireless telephone 4 is performed using, for example, frequency division multiple access (FDMA).
connection device 3 and wireless telephone 4.
A control channel for transmitting connection control signals and a communication channel for transmitting audio signals and the like are allocated for signal transmission between the two.

A plurality of control channels and communication channels are allocated not to each cordless telephone device, but to each predetermined area in which a plurality of cordless telephone devices exist.

Therefore, in conventional cordless telephone devices, the control channel is determined at the time of startup of each cordless telephone device so that a single and fixed control channel is used for each cordless telephone device, and the communication channel is In this case, all the cordless telephone devices arbitrarily select and use an available communication channel from among the plurality of communication channels.

Each connection device 3 and each radio telephone 4 in each cordless telephone device mutually transmits and receives signals for connection using a fixed control channel common to the cordless telephone device when mutually connected. After that, an empty channel is selected from among a plurality of communication channels to make and receive calls.

Here, the operation will be described below, taking as an example a call from the wireless telephone 4 to the connection device 3.

During standby, the control circuit 33 of each connection device 3 is in a reception state, and controls the radio circuit 32 to change the reception frequency to the fixed control channel determined at the time of startup described above and to a plurality of communication channels. sequentially switch to each channel of
The presence or absence of radio input from the antenna 34 in all these channels is monitored.

As a result, each connection device 3 monitors the usage status of control channels and communication channels in this cordless telephone device and other nearby cordless telephone devices, and also stores vacant communication channels.

When the call key 45 of the radio telephone 4 is pressed in this state, the control circuit 44 of the radio telephone 4 detects this, and the control circuit 44 further controls the radio circuit 41 to request connection with the connection device 3. A signal is sent from the antenna 49 to the connection device 3 using the control channel determined at startup, and thereafter enters a standby state in which the control channel is received.

Then, in the wireless circuit 32 on the side of the connecting device 3,
! When the connection request signal from the telephone 4 is received on the above-mentioned control channel, the connection device 3 under the control of the control circuit 33 converts the previously stored information of the free communication channel into the above-mentioned connection request signal. The data is output to the radio telephone 4 that is the originator using the same control channel as used when receiving the data.

Furthermore, the reconnection device 3 and the wireless telephone 4 change mutual signal transmission channels from the control channel determined at the time of startup under the control of each control circuit 33.44 to information on the vacant communication channel. The communication channel is then transferred to the communication channel shown in , and thereafter, calls and calls from the wireless telephone 4 to fixed-line telephones and the like are performed using this communication channel.

On the other hand, in the case of an incoming call to the wireless telephone 4, the incoming call signal from the fixed telephone network etc. is received by the telephone interface circuit 31 of the connecting device 3 via the telephone line 1 and the main device 2, and based on this, the control circuit 33 outputs a signal requesting an incoming call connection and information on a vacant communication channel stored in advance to the destination radio telephone 4 using a control channel determined at startup.

The receiving wireless telephone 4, which is in the standby state in accordance with the control channel determined at startup, receives the incoming connection request signal and the information on the free communication channel from the connection device 3, and performs the free communication. After recognizing the channel frequency for
A connection confirmation signal is output to the connection device 3 using the same control channel as when it was received.

The reconnection device 3 and the wireless telephone 4 then change the mutual signal transmission channels from the control channel determined at startup under the control of each control circuit 33, 44 to the information on the vacant communication channel. The connection operation is performed by shifting to the communication channel shown in , and along with this, Kabu 11
3! On the telephone 4 side, the ringer 48 rings in response to an incoming call.

In this way, in the above-mentioned conventional cordless telephone device, each connection device 3, which corresponds one-to-one with each wireless telephone 4, monitors the usage status of communication channels during standby and stores vacant communication channels. This allows for effective use of limited communication channels.

Problems to be Solved by the Invention However, in the conventional cordless telephone device described above, each connection device 3 selects and stores an empty communication channel from among a plurality of communication channels in the same range, so different connection devices 3 may select and store the same free communication channel.

In this case, when the volume of calls is high and multiple sets of devices are making and receiving calls at the same time, both devices will compete for the same communication channel from the control channel even if there is free space on other communication channels. There was a problem in that interference and connection errors occurred between these two sets, causing trouble in receiving and making calls.

The present invention solves the above-mentioned problems, and reduces the occurrence of mutual interference and connection errors caused by a plurality of sets of connection devices and wireless telephones competing on a single communication channel, and reduces the possibility of interference and connection errors. Connect multiple communication channels to multiple devices and! #
It is an object of the present invention to provide a cordless telephone device that can be effectively used in a set of line telephones.

Means for Solving the Problems In order to achieve the above object, the present invention provides each of a plurality of connection devices in one-to-one correspondence with a plurality of wireless telephones, the contents of a selectable communication channel for each connection device. A selection content setting input means for inputting settings, and a setting content storage means for storing the setting content input from the selection content setting input means, and communication used between a connecting device and a wireless telephone that are paired with each other. The communication channel is selected from among the communication channels stored in the setting content storage means of each connected device.

Effect of the Invention With the above configuration, the present invention can set the contents of channels that can be used among a plurality of communication channels for each connection device and radio telephone, so that a set of a plurality of connection devices and a wireless telephone can be set in a single set. It is possible to reduce the occurrence of mutual interference and connection errors due to contention on one communication channel, and to effectively use a limited communication channel among a plurality of sets of connection devices and wireless telephones.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. still,
The cordless telephone device of the present invention has the same general configuration as that shown in FIG.
The specific configuration is different from the connecting device 3 of FIG. 3 described in the related art.

Therefore, in FIG. 1 showing a specific configuration of a connecting device 3 and a wireless telephone 4 in a cordless telephone device according to an embodiment of the present invention, the same elements as the connecting device 3 of the conventional cordless telephone device in FIG. and radio telephone 4 are given the same reference numerals as those in FIG. 3, and their explanation will be omitted.

In the connection device 3 of the cordless telephone device according to the embodiment of the present invention, 35 is a setting switch as a selection content setting manual means for setting the contents of communication channels that can be used for each connection device 3; Reference numeral 36 denotes a communication channel memory serving as a setting content storage means for storing the content of the communication channel set by the setting switch 35.

Next, the operation of this embodiment with the above configuration will be explained.

First, when installing this cordless telephone device, set the settings switch 3 of each connection device 3 so that the contents of communication channels that can be selected on each connection device 3 are different from each other.
5 to the control circuit 33, and the setting contents are outputted from the control circuit 33 to the communication channel memory 36 and stored therein.

In this state, when making a call from the wireless telephone 4 to the connection device 3, the following operations are performed.

During standby, the control circuit 33 of the connection device 3 is in a receiving state and controls the radio circuit 32 to sequentially change the reception frequency to the control channel and each communication channel stored in the communication channel memory 36. switch to monitor the presence of radio activity from antenna 34 on these channels, including radio communications on other cordless telephone devices;
Furthermore, based on this monitoring result, empty communication channels that are not currently used among the plurality of communication channels stored in the communication channel memory 36 are stored.

Here, when the call key 45 of the wireless telephone 4 is pressed, the control circuit 44 of the wireless telephone 4 detects this, and the control circuit 44 further controls the wireless circuit 41 to send a signal requesting connection with the connection device 3. antenna 4 using the control channel.
9 to the connecting device 3 corresponding to the wireless telephone 4.

When the wireless circuit 32 of the connection device 3 receives the connection request signal from the wireless telephone 4 through the control channel, the signal is stored in the communication channel memory 36 stored in advance under the control of the control circuit 33. Information on vacant communication channels that are not currently being used among the plurality of communication channels is output to the wireless telephone 4 that is the originator of the connection request signal using the control channel described above.

When the above signal transmission/reception is completed, the pair of connection devices 3 and radio telephones 4 change their mutual signal transmission channels from the control channel to the information of the vacant communication channel under the control of their respective control circuits 33 and 44. The process moves to the indicated communication channel, and thereafter, calls and calls from the wireless telephone 4 to the fixed telephone network etc. are performed using this communication channel.

In addition, in the above-mentioned call from the wireless telephone 4,
Even if calls are made from a plurality of wireless telephones 4 at the same time, each connection device 3 selects one of the different communication channels stored in the communication channel memory 36 and uses the stored free communication channel. to make a call or make a call.

Therefore, when transitioning from a control channel to a communication channel, it is possible to reduce the occurrence of mutual interference and connection errors caused by multiple devices competing for a single communication channel, and to limit control over the transition. channels can be used effectively in multiple locations.

On the other hand, in the case of an incoming call to the wireless telephone 4, the incoming call signal from the fixed telephone network etc. is received by the telephone interface circuit 31 of the connecting device 3 via the telephone line 1 and the main device 2, and based on this, the control circuit 33 outputs a signal requesting an incoming call connection and information on a vacant communication channel stored in advance to the receiving wireless telephone 4 using the control channel stored in the communication channel memory 36. do.

Then, the radio telephone 4 at the receiving end, which is in the standby state, is set to the same control channel as the content stored in the communication channel memory 36 of the connection device 3, which is stored in the communication channel memory 51. After receiving the incoming connection request signal and the information on the free communication channel from the connection device 3 and recognizing the free communication channel frequency, the connection confirmation signal is output to the connection device 3 using the above-mentioned control channel.

When the above signal transmission/reception is completed, the pair of connection devices 3 and radio telephones 4 change their mutual signal transmission channels from the control channel to the information of the vacant communication channel under the control of their respective control circuits 33 and 44. Illustrated communication channel 1: transition and connection operation, and along with this, the wireless telephone 4
On the side, the linker 48 rings for an incoming call.

Incidentally, when there is an incoming call to the wireless telephone 4 as described above,
Even if calls are made to multiple radio telephones 4 at the same time, each connection device 3 uses the control channel stored in the communication channel memory 36, as in the case of calls from the radio telephones 4 described above. Since a connection request signal is sent, it is possible to reduce the occurrence of connection errors between multiple devices due to contention on a single control channel, and to effectively use the limited control channel among multiple devices. can do.

Effects of the Invention As described above, according to the present invention, each of the plurality of wireless telephones and the plurality of connection devices in one-to-one correspondence with each of the plurality of wireless telephones has a connecting device and a wireless telephone that are paired with each other. A selection content setting input means for setting and inputting the contents of selectable control channels for each pair of the selection content setting input means, and a setting content storage means for storing the setting content input from the selection content setting input means. The control channel to be used between the connecting device and the wireless telephone is selected from among the control channels stored in the setting storage means of each connecting device and each wireless telephone. The contents of channels that can be used among multiple control channels can be set for each radio telephone and wireless telephone, so that multiple sets of connecting devices and radio telephones compete for a single control channel and are not able to communicate with each other. connection errors,
Limited control channels can be used effectively with multiple connection devices and radiotelephone sets.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a specific configuration of a connecting device and a wireless telephone in a cordless telephone device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a schematic configuration of a cordless telephone device in a shell. , FIG. 3 is a block diagram showing a specific configuration of a connecting device and a wireless telephone in a conventional cordless telephone device. 3... Connection device, 34... Setting switch, 35...
・Communication channel memory, 4... Wireless telephone.

Claims (1)

[Claims] Selection content setting input means for setting and inputting the contents of selectable communication channels for each connection device to each of the plurality of connection devices in one-to-one correspondence with the plurality of wireless telephones; and from the selection content setting input means. A setting content storage means for storing input setting content is provided, and a communication channel used between a pair of connection devices and a wireless telephone is stored in the setting content storage means of each connection device. A cordless telephone device that allows users to select from a variety of channels.