JPH06303187A - Digital radio telephone system - Google Patents

Abstract

PURPOSE:To make it possible to preferentially connect a customer owned and maintained master machine, to search other public base station where a reception state is excellent and to connect it. CONSTITUTION:The radio signals of the control channels of a customer owned and maintained master machine B and a public base station C or E which are received by an antenna 1 are demodulated in a digital radio reception part 2. A control part 4 decides whether the state is good or bad from the detection state of a reception state detection part 3, searches the control channel of the customer owned and maintained master machine B at first when a power source is turned on and the customer owned and maintained master machine B is preferentially connected when the reception state is good. Only when the reception state of the customer owned and maintained master machine B is bad, a public base station C or E is connected, and when the reception state becomes worse while a public base station is connected, one of the public base stations is searched and it is switched and connected.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In recent years, a digital radio telephone device has a child device arranged in a home as a self-employed parent device, which is an interface with an analog telephone line wired in each home, and outside the home outdoors at regular intervals. It has come to be connected to a public base station which is an interface with an established digital wireless telephone line.

A conventional digital radio telephone device will be described below with reference to the drawings. FIG. 5 is a schematic diagram showing a state of line connection processing when the power supply of the slave unit of the conventional digital wireless telephone device is turned on. In the figure, A is a slave unit, B is installed in a home, and a self-employed master unit that interfaces with a public line, C, D, and E are provided in predetermined outdoor areas, respectively, and interface with a public line. It is a public base station. In the following description, the case where the outdoor public base stations are the three stations C, D, and E will be described, but it goes without saying that they may be other cases.
In the figure, when handset A is turned on, a signal including data for controlling line connection is transmitted by a radio signal of a control channel to a self-employed base unit B at home and public base stations C and D outdoors. , And E. At this time, handset A
Of the self-employed base station B and the public base stations C, D and E automatically selects the station with the best reception condition of the radio signal, or manually selects either one to obtain network information. There is.

FIG. 6 is a schematic diagram showing a situation in which the reception state of a radio signal changes due to the movement of the slave unit A. As shown in the figure, when the slave A moves while the control channel of the public base station C is connected and the reception state of the radio signal deteriorates, the slave A displays an alarm display that warns that the reception state has deteriorated. In response to the warning, the user manually operates to reconnect to the control channel of another public base station D in which the reception condition of the radio signal is good.

[0005]

In such a conventional digital radio telephone apparatus, even when the handset is located in the home, when the power is turned on, the radio signal of the control channel of the public base station is transmitted. If the reception status is better than the reception status of the wireless signal on the control channel of the self-employed base unit, the control channel is connected to the public base station, and it is necessary to manually connect to the control channel of the self-employed base unit. You have to reconnect to the control channel of the self-employed master. Also, when the power of the slave unit is turned on outside the home, once the public base station and the control channel are connected, the reception state of the radio signal of the control channel of the public base station deteriorates due to the movement of the slave unit. In that case, there has been a problem that the control channel has to be manually reconnected to another public base station having a good reception condition of the radio signal of the control channel.

The present invention solves the above problems by selecting a self-employed master unit at home when the power of a slave unit is turned on, and selecting a public base station with good radio signal reception condition outside the home. It is an object of the present invention to provide a digital radiotelephone device which can always select and automatically connect a control channel.

[0007]

In order to achieve the above object, the present invention provides a digital radio signal for connecting to a public base station connected to a digital radio telephone line or a self-employed master of a digital radio telephone apparatus. An antenna for transmitting and receiving, a digital radio receiving unit for inputting and demodulating a received digital radio signal and outputting reception data, a reception state detecting unit for detecting a reception state from the reception data, an analysis of the reception data and the reception And a control unit for controlling the operation of the device while analyzing the reception state detected by the state detection unit, the control unit receiving a digital radio signal of the control channel of the public base station when the power is turned on. Even if the state is better than the reception state of the digital radio signal of the control channel of the self-employed master unit, the control channel of the self-employed master unit If the reception state of the digital radio signal is a receivable state, the self-employed master unit is preferentially connected to its control channel, and while the control channel of the public base station is being connected, the control channel of the public base station is It is a digital radiotelephone device that searches for a public base station with which the reception state of the control channel is communicable and reconnects when the reception state deteriorates and the communication becomes impossible.

[0008]

According to the present invention, in the above structure, when the power is turned on, the control channel of the self-employed master unit is preferentially connected at home, and the public base station is always in a good reception state of the radio signal outside the home. The control channel of is automatically selected and connected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the wireless telephone device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of this embodiment. In the figure, 1 is a receiving antenna for transmitting / receiving radio signals to / from a public base station or a self-employed parent device in a home, 2 is a digital radio receiving unit for receiving digital radio signals, and 3 is an electric field level or an interference wave of the present radio signals. A reception state detection unit 4 that outputs wireless information such as a level to the control unit 4 is a control unit that controls the operation of the apparatus, and has a function of analyzing received data and analyzing the reception state.

The interrelationship and operation of the above components will be described below. The antenna 1 receives the radio signal of the control channel from the self-employed master and the public base station and outputs it to the digital radio receiver 2. The digital radio reception unit 2 demodulates the signal and outputs digital data to the control unit 4, and outputs the electric field level or the interference wave level of the radio signal to the reception state detection unit 3. The reception state detection unit 3 determines whether the reception state is good or not based on these levels, and outputs the result to the control unit 4. FIG. 4 is a flowchart showing the operation of this embodiment. When the power of the child device A of the digital wireless telephone device is turned on, the control unit 4 searches the control channel of the self-employed master device B in step 1, and when the control channel of the self-employed master device B can be searched, in step 2, The reception state of the radio signal of the control channel of the self-employed master B is compared with a predetermined threshold value to check whether the reception state is good or bad. This state is shown in FIG.

If the reception condition is good in step 2, the control channel of the self-employed master device B is searched and the reception condition is good. Therefore, it is determined that the slave device A is located in the home, and the process proceeds to step 7. The mode is changed to a mode in which the data is received in synchronization with the control channel of the self-employed master B. Step 7
Connect to the control channel of self-employed base unit B with and then step 8
The reception state is constantly checked, and if the reception state deteriorates, the process proceeds to step 9 to display a warning.

If the control channel of the self-employed base unit B cannot be retrieved in step 2, or if the control channel of the self-employed base unit B can be retrieved but the reception state of the radio signal is poor, it is determined that the slave unit A is not located in the home, 3, the control unit 4 moves the public base station C
To control channels E to E. Public base stations C and D
Alternatively, if the control channel of any one of E stations can be searched, the process proceeds to step 4, the reception state of the radio signal of the control channel is compared with a predetermined threshold value, and whether the reception state is good,
Or check if it is bad. For example, public base station C
If the control channel can be searched for and the reception condition of the radio signal is good, the process proceeds to step 5, where the control channel of the public base station C is synchronized and the data is received. After connecting to the public base station C in step 5, the process proceeds to step 6 and the reception state is constantly checked. When the reception condition deteriorates, the process proceeds to step 3 to search for any one of the public base stations C, D or E that can be connected.

As described above, according to the digital radio telephone apparatus of the embodiment of the present invention, when the power is turned on, first, the control channel of the self-employed master B in the home is searched, and the self-employed master B is searched. If the control channel is in a good reception state, it is surely connected to the self-employed master B, and the control channel of the self-employed master B cannot be searched, or if the reception is poor, the public base station C or E is assumed to be located outdoors. Connect the control channel of. When the reception condition of the public base station C, which has been in good reception until now, deteriorates, as shown in FIG.
Moves to search for another public base station D or E, and is connected to, for example, a public base station D having a good reception state.

[0014]

As is apparent from the above description, the digital radio telephone apparatus of the present invention is a digital radio telephone for connecting to a public base station connected to a digital radio telephone line or a self-employed master of the digital radio telephone apparatus. An antenna for transmitting and receiving signals, a digital radio receiving unit for inputting and demodulating a received digital radio signal and outputting reception data, a reception state detection unit for detecting a reception state from the reception data, and an analysis of the reception data. The control unit controls the operation of the device while analyzing the reception state detected by the reception state detection unit, and when the power supply is turned on, the control unit digitally controls the control channel of the public base station. Even if the reception state of the radio signal is better than the reception state of the digital radio signal of the control channel of the self-employed master unit, If the reception state of the digital radio signal of the control channel is in a receivable state, the self-employed master unit is preferentially connected to its control channel, and while the control channel of the public base station is being connected, When the control channel reception status deteriorates and communication becomes impossible, a public base station with which the control channel reception status is communicable is searched for and reconnected. When the reception condition with the public base station deteriorates outdoors, it is possible to search for and connect to another public base station, eliminating the need for a manual control channel switching operation. It has the effect of improving usability.

[Brief description of drawings]

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

FIG. 2 is a schematic diagram showing a connection state when the power of the digital wireless telephone of the present invention is turned on.

FIG. 3 is a schematic diagram showing a connection situation when the reception state of a radio signal deteriorates in the digital radio telephone of the present invention.

FIG. 4 is a flowchart showing the operation of the digital wireless telephone of the present invention.

FIG. 5 is a schematic diagram showing a connection state when a conventional digital wireless telephone is turned on.

FIG. 6 is a schematic diagram showing a connection situation when a reception state of a radio signal deteriorates in a conventional digital radio telephone.

[Explanation of symbols]

 1 antenna 2 digital radio receiver 3 reception state detector 4 controller

Claims (1)

[Claims] 1. An antenna for transmitting / receiving a digital radio signal for connecting to a public base station connected to a digital radio telephone line or a self-employed master of a digital radio telephone apparatus, and a received digital radio signal are input and demodulated. A digital radio receiving unit for outputting received data, a receiving state detecting unit for detecting a receiving state from the received data, an analysis of the received data and an analysis of the receiving state detected by the receiving state detecting unit, and an apparatus When the power is turned on, the control section controls the operation of the digital radio signal of the control channel of the public base station, Even if the state is better than the state, the reception state of the digital radio signal of the control channel of the self-employed parent device is in a receivable state. Then, the self-employed base unit is preferentially connected to its control channel, and while the control channel of the public base station is being connected, the reception state of the control channel of the public base station deteriorates and the communication becomes impossible. When
A digital radiotelephone device that searches for a public base station with which the control channel reception status is communicable and reconnects.