JP2937207B2 - mobile phone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Automobile telephones are becoming widespread as wireless telephone systems. In this wireless telephone system, automatic
A car telephone can move from a service area of one base station (base station area) to a service area of another base station while talking. Alternatively, a call or an incoming call can be made from a car moving at high speed.

[0003] However, in order to realize such a function, the base station, shall be not always manage to grasp the current location of each car phone. For this reason, base stations need to be connected to each other by computer,
The system of the base station becomes complicated and large-scale.

[0004] In contrast to such a wireless telephone system, there is a portable telephone system called a telepoint system as a next-generation wireless telephone system. This depends on the country: PHP (Japan), CT-2 (Europe), D
It is called ECT ( Europe ).

[0005] In this telepoint system, a base station (telepoint base station) does not manage a slave unit in principle. For this reason, a call can be made from the slave unit, but a call cannot be received to the slave unit. When an incoming call is required, a predetermined key operation is performed so that the current location is notified from the slave unit to the base station in advance.

Further, since the base station does not control the slave unit, the slave unit cannot move from the service area of one base station to the service area of another base station while talking, and during the call, It can move only within one service area.

That is, the telepoint system is similar to a wireless public telephone or a cordless telephone having a wide portable range.

In the telepoint system, there is a restriction on the use of the slave unit. However, since the base station does not need to manage the slave unit in principle, the base station can be greatly simplified.

[0009]

However, even if the slave unit is in the service area, if the radio wave conditions are poor, such as in an underground shopping mall, the call cannot be made or the call state will be poor. You need to find a place where you can do it.

[0010] In addition, within one service area,
If you move away from the base station while using such a method, you can move while talking on the phone. Can be difficult to understand and cause trouble.

Further, if a call is made from outside the service area, the call cannot be accepted and the service area must be searched by some method, but there is no appropriate method.

[0012] The present invention solves such a problem,
The purpose is to improve the user interface.

[0013]

Therefore, in the present invention, when the reference numerals of the respective parts correspond to the embodiments described later, the reception level of the down-channel modulated signal Sd received by the receiving circuit 120 in the portable telephone is determined. a detection circuit 151 for detecting a drive signal based on the detection output Ss of the detection circuit 151 is supplied, the reception level of the transmission signal Sd of the down channel is received in the receiving circuit 120 provided with Table Shimesuru display 155.

[0014]

FIG. 1 shows an example in which the present invention is applied to a slave unit (mobile phone) of a telepoint system.
The basic configuration and operation of the slave will be described.

In FIG. 1, reference numeral 110 denotes a transmitting circuit;
Is a receiving circuit, the transmitting circuit 110 converts an audio signal St or the like into an upstream channel FM signal Su, and transmits the signal to the base station. The receiving circuit 120 is a downstream channel FM signal Sd from the base station. And the audio signal Sr
And the like.

Reference numeral 131 denotes a dial key, 132 denotes operation keys such as a talk key, 133 denotes a key interface, and 140 denotes a microcomputer for system control. In the microcomputer 140, 141 is a CPU, 142 is a ROM in which various programs are written, and 143 is a RAM for a work area.
The memories 142 and 143 are connected to the system bus 149.
Through the CPU 141.

During a call, the voice signal St from the transmitter 111 is transmitted through the amplifier 112 to the FM modulation circuit 1.
13 and is converted into an FM signal Su.
u is supplied to the frequency converter 114, and an oscillation signal having a predetermined frequency is supplied from the oscillation circuit 101 to the converter 114, so that the FM signal Su is frequency-converted into a predetermined upstream channel FM signal Su. And this F
The M signal Su is supplied to the antenna 100 through a signal line of the band pass filter 115 → the transmission power amplifier 116 → the duplexer 117, and transmitted to a base station (not shown).

Also, the FM of the downlink channel from the base station is
The signal Sd is received by the antenna 100 and the signal Sd
d is supplied to the frequency converter 123 through the signal line of the duplexer 117 → the high-frequency amplifier 121 → the band-pass filter 122, and the oscillation signal from the oscillation circuit 101 is supplied to the converter 123 so that the FM signal Sd becomes the intermediate frequency signal Si. Is converted. Then, the signal Si is supplied to an FM demodulation circuit 125 through an intermediate frequency amplifier 124 to demodulate the voice signal Sr of the other party of the telephone.
Supplied to

Therefore, it is possible to talk with the other party from the slave through the base station. At this time, the oscillation frequency of the oscillation circuit 101 is controlled by the CPU 141 through the interface 102, and the channel between the slave unit and the base station is a predetermined channel.

The present invention is particularly configured as follows.

That is, an intermediate frequency signal Si is extracted from the intermediate frequency amplifier 124, and this signal Si is output to the detection circuit 1
A signal Ss, which is supplied to an A / D converter 51, is supplied to a receiver 51 and indicates the reception level of the FM signal Sd.
Interface 1 after A / D conversion at 52
53 and the interface 15
3 is connected to the bus 149. Thus, the signal Ss becomes
The signal is periodically taken into the CPU 141 by the CPU 141, and is converted into a drive signal corresponding to the reception level indicated by the signal Ss.

An interface 15 is connected to the bus 149.
4, the display 155 is connected. The display 155 displays the reception level of the FM signal Sd in an analog manner. Therefore, the display 1
55, for example, as shown in FIG. 2, 12 LEDs (L1
) To (L12) are arranged in a line, the drive signal converted by the CPU 141 is supplied through the interface 154, and the LED is determined according to the drive signal.
The LEDs (L1) to (L12) are driven in order from (L1) and so that the number of lit LEDs increases.

Further, these LEDs (L1) to (L12)
LED (L1) corresponding to outside service area
Beside (L4), letters or symbols such as "out of service area"
Indicators are provided, LED corresponding to the service area
Beside (L5) to (L12), an index such as a character or a symbol of "range" is provided.

According to such a configuration, when a down-channel FM signal Sd is transmitted from the base station during a call or by requesting a call, the reception level of the FM signal Sd from the detection circuit 151 is changed. Is output to the CPU 141 through the A / D converter 152 and the interface 153 and is converted into a drive signal corresponding to the signal Ss. The drive signal is output from the CPU 141 to the interface 154.
Is supplied to the display 155. Therefore, of the LEDs (L1) to (L12), the number of LEDs corresponding to the value indicated by the signal Ss, that is, the number of LEDs corresponding to the reception level of the FM signal Sd are lit sequentially from the LED (L1).

At this time, when the reception level of the FM signal Sd is outside the service area and near the boundary, the LEs (L1) to (L4) are turned on such that the LEs are turned on.
The lighting characteristic of D is set.

Therefore, the user can use the display 15
From the lighting state of the LEDs (L1) to (L12), it is possible to know whether or not the user is in a service area or an area where a call can be made.

Also, when a call is requested from outside the service area, it is possible to roughly know how far away from the service area the LED (L1) to (L4) are lit. Alternatively, a base station or a service area can be found from the lighting state.

Further, even when the user moves while talking, the lighting state of the LEDs (L1) to (L12) changes as the user moves, so that it is possible to prevent deterioration of the talking state by moving away from the base station. Can be prevented.

The LED (L1) of the display 155
) To (L4) and (L5) to (L12) can be different in color, for example, red and green. Also,
Display 155 is LCD or displayed by numbers
It is also possible to or. Further, in the above, the case of the slave unit of the telepoint system is described, but the present invention can be applied to other types of mobile phones.

[0030]

According to the present invention, the detection level of the down-channel FM signal Sd from the base station is detected by the detection circuit 151, and the received level is displayed on the display 155 in an analog manner. From the lighting state of the LEDs (L1) to (L12) of the display 155,
You can know if you are in a service area or a call area.

Also, when a call is requested from outside the service area, it is possible to roughly know how far the terminal is off the service area by the lighting state of the LEDs (L1) to (L4). Alternatively, a base station or a service area can be found from the lighting state.

Further, when moving while talking, the lighting state of the LEDs (L1) to (L12) changes with the movement, so that it is possible to prevent deterioration of the talking state by moving away from the base station. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a system diagram of an example of the present invention.

FIG. 2 is a front view of an example of a display.

[Explanation of symbols]

 Reference Signs List 110 transmission circuit 111 transmitter 113 modulation circuit 120 reception circuit 124 intermediate frequency amplifier 125 demodulation circuit 127 receiver 140 microcomputer 151 detection circuit 152 A / D converter 155 display

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 7/26 H04M 1/00 H04Q 7/00-7/38

Claims (1)

(57) [Claims] 1. A transmitter, a transmitting circuit for converting an audio signal from the transmitter into an upstream channel transmission signal and transmitting the same, a receiving circuit for receiving a downstream channel transmission signal and extracting the audio signal, and A receiver to which the audio signal extracted by the receiving circuit is supplied; a detecting circuit for detecting a reception level of the down-channel transmission signal received by the receiving circuit; and a drive signal based on a detection output of the detecting circuit. It is supplied, and a display for displaying the reception level of the received modulated signal of the downlink channels of the receiving circuit, the display, and a plurality of display portions indicating stepwise the reception state, the plurality of display units Provided in the vicinity, and the reception
A mobile phone having an indicator indicating whether it is in a good range or a good range .