JP3236153B2 - Digital radio telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone.

[0002]

2. Description of the Related Art In recent years, wireless telephone devices have been widely used with their improved convenience and economy.
Among them, cordless telephones having a limited range of use in offices and homes, and wireless telephones that convert analog signals into digital signals for communication have become widespread, and direct communication between child devices has been performed.

A slave unit 11 of a conventional digital radio telephone is configured as shown in FIG. 1 is a wireless unit for performing wireless communication with a master unit or a slave unit of a digital wireless telephone, 2 is an antenna, 3 is a voice decoding unit for decoding a received digital signal into a voice signal, 4 is a receiving unit for outputting voice, 5
Is a transmitting unit, 6 is a voice coding unit that codes the voice signal input by the transmitting unit 5 into a digital signal, 7 is a key operation unit,
Reference numeral 8 denotes a control unit that supplies and controls power to each of the above units and performs error correction of a digital signal. Reference numeral 9 denotes an electric field detection unit that detects an electric field level. The user of the wireless telephone device
When making a direct call, the calling side is the key operation unit 7
Dial input and perform call operation. When the calling operation is completed, the control unit 8 determines the electric field level from the electric field detecting unit 9, determines the frequency for outputting the radio wave, converts the calling request signal into a radio signal by the radio unit 1, and 2 as a radio wave. The called side dials in the key operation unit 7 to perform a call waiting operation. When the operation is completed, the control unit 8 switches the standby frequency at regular intervals, and waits for the radio wave to arrive via the antenna 2. When the radio wave arrives at the called side via the antenna 2, it is converted into a call request signal by the radio unit 1 and reaches the control unit 8. The control unit 8 converts the response signal to a wireless signal by the wireless unit 1 and outputs it as a radio wave via the antenna 2 to start a telephone call. When the radio wave arrives at the calling side via the antenna 2, the radio unit 1 converts the radio wave into a response signal and reaches the control unit 8. The control unit 8 receives this and starts talking. When radio wave interference occurs during a call, the side detecting the interference sends a channel switching start signal, and the calling side and the called side start channel switching. On the calling side, the control unit 8 determines the electric field level from the electric field detection unit 9, determines the frequency for outputting the radio wave, converts the synchronization request signal into a radio signal by the radio unit 1, Output as On the called side, the control unit 8 switches the standby frequency at regular intervals, and waits for the radio wave to arrive via the antenna 2. When the radio wave arrives at the called side via the antenna 2, it is converted into a synchronization request signal by the radio unit 1 and reaches the control unit 8. The control unit 8 converts the synchronization response signal into a wireless signal in the wireless unit 1 and outputs it as a wireless radio wave via the antenna 2 to resume the call. When the radio wave arrives via the antenna 2, the calling side converts the radio wave into a synchronization response signal in the radio unit 1 and controls the control unit 8.
To reach. In response to this, the control unit 8 resumes the call.

[0004]

In such a conventional digital radio telephone apparatus, when channel switching is performed to avoid radio wave interference, the calling side searches for a new free channel each time and performs radio communication. Outputs radio waves. Since the called side is configured to wait for radio waves by switching a number of frequencies at fixed time intervals, it takes a lot of time to synchronize with the radio waves output by the calling side, and the call is interrupted. Has the problem that it is long.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a radio telephone apparatus capable of shortening the time during which a call is interrupted when a channel is switched by detecting the occurrence of interference in a call channel.

[0006]

According to a first aspect of the present invention, there is provided a wireless telephone device capable of communicating between slave units.
Each handset has low interference, independent of the call channel.
Frequency management section that can register new channels, and electric field level
An electric field detector for detecting the electric field and a controller are provided.
The control unit of the slave unit determines the electric field level from the electric field detection unit.
Available channels other than those used for calls
Select a channel and show the available channels
Channel information is stored in the idle frequency management section, and
Sends vacant channel information to the other handset, and
Transmits the received idle channel information to an idle frequency management unit.
And detects radio wave interference during a call between both slave units.
Is detected, the side that detected the interference between the two
A channel switching start signal is sent to the other handset,
Switching of the idle frequency and starting the idle frequency stored in the idle frequency management unit.
Switch the call channel according to the channel information
It is characterized by having such a configuration . No claim 2
The line telephone device according to claim 1, wherein one of the slave units is the other slave unit.
When you start a call by calling the phone,
When a calling operation is performed at this time, the control unit of the calling handset
Channel used to determine and use electric field level from field detector
And select another available free channel.
To notify the idle frequency management unit, and a call request signal
The idle channel information is sent to the called slave,
The receiving side, that is, the called side slave unit receives the call request signal.
Then, the control unit of the called handset outputs a response signal to the calling handset.
To start a call and receive the empty channel
And stores the channel information in the idle frequency management unit in the called slave unit.
The calling handset receives the response signal to initiate a call.
It is characterized in that it is configured to start . Claim 3
The wireless telephone device according to claim 2, wherein both of the idle
Multiple channel information is stored in the frequency information manager
If interference is detected, the calling handset
One of a plurality of channel information in the frequency information management unit
Channel and sends a synchronization request signal to the called slave
The call is transmitted and registered in the idle frequency
Waiting for incoming and scan multiple channels are, before
The communication is resumed when the synchronization request signal is received . The wireless telephone device according to claim 4 is a wireless telephone device according to claim 1.
Call when one handset calls the other handset
Calling operation was performed on the calling handset when starting
When calling, one or more available channels may be
Select the number and pass it to the idle frequency management
In the idle frequency management unit, the
Prioritize channels and manage as free channel information
It is characterized by doing. The wireless telephone device according to claim 5.
In claim 2, the calling side handset generates interference during a call.
When a live signal is detected, a channel switching start signal is output to the called side.
Vacant frequency depending on the electric field level in the electric field detecting section.
Radio waves from available channels registered in the management unit
Output channel and determine the channel
Sends a synchronization request signal to the called side slave unit.
When the synchronization request signal arrives at the handset, the control unit of the called handset
Sends a synchronous response signal to the calling handset.
Resumes the call, and during the call the
If a live call is detected, it is notified by information from the calling handset.
The control unit matches the channel stored in the idle frequency management unit.
Switch at regular time intervals and receive a radio wave from the calling handset.
Waits for a call and sends the call to the
When the call request signal arrives, the control unit of the called slave unit
By sending a synchronous response signal to the calling handset.
The feature is to resume the call.

[0007] A wireless telephone device according to claim 6 is a wireless telephone device.
In a wireless telephone device that can communicate with a backbone, an idle frequency management unit in which a channel with little interference is registered separately from a communication channel, and in the case of a calling side, the occurrence of interference in the communication channel is detected. Alternatively, a channel switching start signal from the called side is detected, and a channel switching start signal is output to the called side to switch the communication channel to another channel registered in advance in the idle frequency management unit, and If it is the side, it detects the occurrence of interference in the communication channel, outputs a channel switching start signal to the calling side, and scans the communication channel to another channel registered in advance in the idle frequency management unit. And a control unit for waiting for an incoming call.

[0008] A wireless telephone device according to a seventh aspect is a wireless telephone device.
In a wireless telephone device that can communicate with a backbone, a free frequency management unit in which a channel with little interference is registered in addition to a communication channel, and a free frequency management unit on the called side in the case of a calling side. The channel information registered in the idle frequency management unit is transmitted, and the occurrence of interference in the communication channel is detected or the channel switching start signal from the called side is detected, and the channel switching start signal is transmitted to the called side. To switch the communication channel to another channel registered in advance in the vacant frequency management unit, and in the case of the called side,
Registers the channel information from the calling side in its own free frequency management unit, detects the occurrence of interference in the communication channel, outputs a channel switching start signal to the calling side, and registers in advance in the free frequency management unit And a control unit that scans the specified communication channel and waits for an incoming call.

[0009]

According to this configuration, the calling side stores a plurality of free frequency candidates in the free frequency management unit, and the called side stores the plurality of free frequency candidates notified from the calling side. On the other hand, when performing channel switching to avoid radio wave interference during direct communication between slave units, the calling side selects from available frequency candidates, so that the time required to determine the frequency to be used can be reduced. Further, since the called side switches the frequency from the available frequency candidates and waits, it is possible to reduce the time required until synchronization with the radio wave output from the calling side is obtained.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. 1 is a radio unit, 2 is an antenna, 3 is a voice decoding unit, 4
Is a receiving unit, 5 is a transmitting unit, 6 is a voice encoding unit, 7 is a key operation unit, 8 is a control unit, and 9 is an electric field detection unit, and performs the same operation as the conventional example. Reference numeral 10 denotes an idle frequency management unit that manages idle frequency information, and the above blocks constitute a slave unit 11 of the digital wireless telephone. Next, the configuration of the control unit 8 will be described based on the operation.

When the user of the wireless telephone device makes a direct telephone call between the child devices, the calling side performs dialing with the key operation unit 7 to perform a calling operation. When the calling operation is completed, the control unit 8
Determines the electric field level from the electric field detector 9 to determine the frequency at which the radio wave is output, selects one or more available empty frequencies, and notifies the empty frequency manager 10 together with the electric field level value. . Free frequency management unit 1
At 0, priorities are assigned to the frequencies according to the electric field level value and managed as free frequency information. Next, the call request signal and the vacant frequency information are converted into radio signals by the radio unit 1 and output as radio waves via the antenna 2. The called side dials in the key operation unit 7 to perform a call waiting operation. When the operation is completed, the control unit 8 on the called side switches the standby frequency at regular intervals, and the radio wave is transmitted to the antenna 2.
Wait for an incoming call via. When the radio wave arrives at the called side via the antenna 2, the radio unit 1 converts the radio wave into a call request signal and free frequency information and reaches the control unit 8. The control unit 8 converts the response signal to a radio signal by the radio unit 1, outputs the radio signal via the antenna 2 as a radio wave, starts a call, and stores the vacant frequency information in the vacant frequency management unit 10. When the radio wave arrives at the calling side via the antenna 2, the radio unit 1 converts the radio wave into a response signal and reaches the control unit 8. The control unit 8 receives this and starts talking.

When radio wave interference is detected during a call, the side detecting the interference transmits a channel switching start signal, and the calling side and the called side start channel switching. On the calling side, the control unit 8 determines a frequency for outputting a radio wave based on the information from the vacant frequency management unit 10 and the electric field level from the electric field detection unit 9, and converts the synchronization request signal into a radio signal in the radio unit 1. The signal is output as a radio wave via the antenna 2. On the called side, the control unit 8 switches the frequency notified by the information from the idle frequency management unit 10 at regular intervals, and waits for the radio wave to arrive via the antenna 2. When the radio wave arrives at the called side via the antenna 2, it is converted into a synchronization request signal by the radio unit 1 and reaches the control unit 8. The control section 8 converts the synchronization response signal into a radio signal in the radio section 1 and outputs it as a radio wave via the antenna 2 to resume the call. When the radio wave arrives at the calling side via the antenna 2, the radio unit 1 converts the radio wave into a synchronization response signal and reaches the control unit 8. In response to this, the control unit 8 resumes the call.

[0013]

As described above, according to the present invention, by providing an idle frequency management unit in a slave unit of a digital radio telephone, when performing channel switching due to radio wave interference,
On the calling side, the frequency for outputting the radio wave is determined from the vacant frequency candidates stored in the vacant frequency management unit, so that the time until the radio wave is output can be reduced.

[0014] In addition, since the called side switches the frequency from the available frequency candidates stored in the available frequency management section and waits, the time required for synchronization with the radio wave output from the calling side is reduced. be able to. Therefore, the time required for channel switching can be reduced, the time during which a call is interrupted can be reduced, and an unpleasant feeling given to the user can be reduced, which is practically effective.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a digital wireless telephone device according to the present invention.

FIG. 2 is a block diagram of a conventional digital radio telephone device.

[Description of Signs] 1 Radio unit 2 Antenna 3 Voice decoding unit 4 Receiver unit 5 Transmitter unit 6 Voice encoder unit 7 Key operation unit 8 Control unit 9 Electric field detection unit 10 Free frequency management unit 11 Handset of digital radio telephone

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

Claims (7)

(57) [Claims] 1. A wireless telephone device capable of communicating between slave units.
Each handset has low interference, independent of the call channel.
An empty frequency management unit that can register
An electric field detector for detecting the bell and a controller are provided, and
The control unit of the other handset determines the electric field level from the electric field detection unit
To make available channels other than the channel used for calls.
Select a channel and show its available channels
Storing vacant channel information in the vacant frequency management unit,
Sends the same free channel information to the other
The device manages the received free channel information for free frequency.
Unit, and detects radio wave interference during a call between both slave units.
If an error occurs, the side that detected the interference between the two
Send a channel switching start signal to the other handset,
Starts the switching of the channel and stores the
Switch call channels according to available channel information
A wireless telephone device characterized by being configured as described above . 2. One of the slave units calls another slave unit.
When starting a call, a calling operation is performed on the calling handset.
Then, the control unit of the calling side slave unit receives the electric field from the electric field detection unit.
Judge the bell to determine the channel to use and other
Select an available free channel and select the available frequency
Notify the management unit, call request signal and the idle channel information
Information to the called handset, and the called side, called called handset
Upon receiving the call request signal, the mobile device controls the called mobile device.
The control unit outputs a response signal to the calling handset and starts talking.
Receiving the idle channel information received together with the
In the free frequency management unit in the
Configured to initiate a call by receiving a signal
The wireless telephone device according to claim 1, wherein: 3. A plurality of channels are provided in both free frequency information management units.
If channel information is stored, interference was detected.
At the time, the calling handset has a plurality of
One channel is determined from the channel information and
Send a request signal to the called slave, and the called slave is idle.
Scan multiple channels registered in the frequency management unit.
And wait for an incoming call and receive the synchronization request signal.
The wireless telephone device according to claim 2, wherein the call is resumed . 4. When one handset calls another handset,
When starting a call, a calling operation is performed on the calling handset.
Caller, the calling handset will use one or more available channels.
Is an empty frequency management unit with multiple selections and electric field level values
And the idle frequency management section checks
Prioritize channels and use them as free channel information
The wireless telephone device according to claim 1, wherein the wireless telephone device is managed. 5. The method according to claim 1 , wherein the calling side handset detects the occurrence of interference during a call.
Output a channel switching start signal to the called side,
Enter the vacant frequency management unit according to the electric field level at the electric field detection unit.
Outputs radio waves from the free channels recorded
Determine the channel and synchronize on the determined channel
Sends a request signal to the called slave and requires synchronization with the called slave.
When a request signal arrives, the control unit of the called-side slave unit responds.
By sending a synchronization response signal to the calling handset.
Resume the call and detect the occurrence of interference with the called slave during the call.
Is notified by information from the calling handset,
The control unit controls the channels stored in the number management unit at regular intervals.
Switch to check for incoming radio waves from the calling handset.
Standby, synchronization request signal from calling handset to called handset
When an incoming call arrives, the control unit of the called slave unit
Call is resumed by sending a response signal to the calling handset
The wireless telephone device according to claim 2, wherein 6. A wireless telephone device capable of communicating between slave units.
In addition, an idle frequency management unit in which a channel with little interference is registered separately from the call channel, and, if the caller is a caller, detects the occurrence of interference in the call channel or a channel from the callee. A switching start signal is detected, a channel switching start signal is output to the called side, and the communication channel is switched to another channel registered in advance in the idle frequency management unit. A control unit that detects the occurrence of interference in the channel, outputs a channel switching start signal to the calling side, scans the communication channel on another channel registered in advance in the idle frequency management unit, and waits for an incoming call. The wireless telephone device provided. 7. A wireless telephone device capable of communicating between slave units.
In addition, the vacant frequency management unit in which a channel with little interference is registered separately from the communication channel, and in the case of the calling side, the vacant frequency management unit in the called side is registered in its own vacant frequency management unit. Transmitting the channel information, and detecting the occurrence of interference in the communication channel or detecting the channel switching start signal from the called side, and outputting the channel switching start signal to the called side to transmit the idle frequency management. The call channel is switched to another channel registered in advance in the unit, and in the case of the called side, the channel information from the calling side is registered in its own free frequency management unit, and interference of the call channel is prevented. A wireless telephone device comprising: a control unit for detecting the occurrence, outputting a channel switching start signal to a calling side, scanning a communication channel registered in advance in the idle frequency management unit, and waiting for an incoming call.