JPH0425233A - Radio equipment - Google Patents

Abstract

PURPOSE:To judge whether or not the service is received accurately and quickly by detecting and displaying an electric field strength and displaying it when the electric field strength does not reach a setting level and the service is not available. CONSTITUTION:An envelope is extracted from a reception signal by an envelope detector 28 via an antenna 25, a switch 26 and a reception section 27 and after the median of the envelope is extracted by a median detection circuit 31 composed of a comparator 29 and an integration circuit 30, the electric field strength corresponding to the identification number of each area is stored in a memory 32. Then a level deciding circuit 33 outputs an electric field strength in an area having the highest reception electric field strength among talking areas and an electric field strength of a message area. The output is selected by using a mode changing over switch 14 and the result is inputted to an electric field strength display section 12. Thus, whether or not the service is available is quickly and accurately judged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application WF) The present invention relates to a radio device installed in a mobile station applied to mobile communications, such as a car phone.

(Prior art) In the conventional car telephone system using the small zone system, the 7th
As shown in the figure, a wireless zone 1 consists of base stations that transmit and receive call signals and control signals to and from mobile stations, and a control zone 2 consists of a wireless line control station that controls multiple wireless base stations.
and an exchange zone 3 having a mobile telephone exchange for performing location registration, billing, etc.; the exchange zone 3 is constituted by a plurality of control zones 2; and the control zone 2 is constituted by a plurality of wireless zones 1. Wireless zone 1 overlaps with each other, and a mobile station can make a call when it is within the wireless zone, and cannot make a call when it is outside the wireless zone area because it is out of range. It becomes impossible. FIG. 8 is a diagram showing the external appearance of a conventional radio device installed in a mobile station, which has an out-of-range display section 5 for displaying out-of-service area and an electric field display section 6 for displaying electric field strength. It has the function of displaying the electric field strength when the device is in the wireless zone, and indicating that it is out of the wireless zone. This allows the mobile station to determine whether a call is possible or not, and if it is possible to make a call, the mobile station can transmit and receive data to and from the base station using the transmitting unit 7 and receiving unit 8 of the wireless wireless device 4. can.

(Problems to be Solved by the Invention) Incidentally, from the viewpoint of service improvement, it is expected that various messages will be provided from the base station to the mobile station within the control zone 2 in the near future. In this case, the conventional radio device 4 described above does not have a function to display the electric field strength within the control zone, and also does not have a function to display message information, so it is not possible to receive the message service.
Therefore, there has been a strong desire for a wireless device that can support such message services.

The present invention has been made in view of the above, and its purpose is to provide a system that allows a user to accurately receive call services and message services.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a radio device installed in a mobile station that communicates within a message area that includes a plurality of call areas, A field strength detection display means for detecting and displaying the field strength at the location of the radio in the area, and an out-of-communications range display indicating that the field strength detected by the field strength detection and display means has not reached a set level. and means for receiving and displaying messages from base stations in the call and message area.

(Function) The wireless device of the present invention detects and displays the electric field strength at its location within the call area and message area, and also indicates when the electric field strength does not reach a set level and service cannot be received. By displaying the message, it is possible to accurately and quickly judge whether or not the service is available, and by being able to receive and display the message provided from the base station, it is possible to receive the message service even outside the calling area.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a diagram showing the external configuration of an annular @11110 according to an embodiment in which the present invention is applied to a mobile communication system with a minimal zone configuration.

In a mobile communication system with a minimal zone configuration, as shown in FIG.
and a message area 19 corresponding to the conventional control zone 22 that includes the plurality of call areas 20, and provides both call services and message services.

Note that as the transmission output power of radio equipment becomes smaller, communication areas are less likely to be adjacent or overlap, and exist in discrete areas. In this mobile communication system, it is necessary to use a radio to determine whether a call service or a message service is available.

Therefore, the radio device 10 of this embodiment has a field strength display section 12 that displays the field strength at the location of the mobile station in the message area 19 or the call area 20 according to the setting of the mode changeover switch I4, which will be described later. an out-of-service area display unit 11 that displays that the message is out of range of the message area 19 or call area 20; an incoming call display unit 15 that displays an incoming message; and a message request switch 16 that requests transmission of a message. This configuration includes a message display section 13 that displays messages, and a mode changeover switch 14 that switches between messages and calls. Note that 17 is a transmitter and 18 is a receiver.

To display the electric field strength in both areas with [110],
A carrier wave frequency f is sent to the radio 8110 from the message area control base station 22 which controls the message area 19 and the call area control base station 23 which controls the call area 20 shown in FIG. The signals shown in FIG. 3 are transmitted in a time-division manner. Here, the message area electric field strength measurement signal is composed of a message area identification signal indicating the identification number of the message area, a message incoming signal indicating the arrival date of the message, and an electric field strength measurement signal. The measurement signal is composed of a call area identification signal indicating the identification number of the call area and a field strength measurement signal. In the wireless 8110, the above area identification number and the wireless device 10
The electric field strength of each area is detected by comparing the area identification number in the memory of the area.

Next, the operation of this embodiment will be explained using the circuit block diagram without Ilamto shown in FIG.

The received signal passes through an antenna 25, a switch 26, and a receiving section 27, and then an envelope is extracted by an envelope line detector 28, and then sent to a median detection circuit 3 consisting of a comparator 29 and an integrating circuit 30.
After the median value of the envelope line is extracted in step 1, the electric field strength value corresponding to the identification number of each area is stored in the memory 32, and the level determination circuit 33 selects the area with the highest received electric field strength in the call area. Outputs the electric field strength of the area and the electric field strength of the message area. These outputs are selectively switched using the mode changeover switch 14 and input to the electric field strength display section 12. The mode changeover switch 14 is (
(a) When switched to a contact point, the mode is a call mode; (b) When switched to a contact point, a message mode is set. At this time, the switch 41 is interlocked with the mode changeover switch 14, and when the switch 14 is connected to (a>contact), (
When the switch 14 is connected to the (b) contact, it is connected to the (a) contact and connected to the memory 40. Similarly, switch 37 is linked to mode changeover switch 14, and switch 1
When the switch 4 is connected to the (a) contact, it is connected to the (a) contact, and when the switch 14 is connected to the (b) contact, it is connected to the (b) contact. Message area 19
When the electric field strength in the call area 20 falls below a specified value, the out-of-service area display section 11 displays that the communication area is out of service area.

It is assumed that the message signal is received in both the call mode and the message mode, and the message is displayed when the mode changeover switch 14 is set to the (b) contact.

The specific operation is as follows. When there is an incoming message, the message incoming signal of the message area electric field strength measurement signal becomes a specific pattern (for example, "0" if there is no incoming call, "1" if there is an incoming call).
10, there is a message incoming display in which the pattern of the message incoming signal is checked in the identification circuit 36 via the demodulation circuit 34 and the decoding circuit 35, and when it matches the signal pattern indicating incoming call, an incoming call is displayed on the incoming call display section 15. and radio 10
When a user wants to obtain message information, regardless of whether he or she is in the call area 19 or the message area 20, the user must switch the mode changeover switch 14 to the (b) contact to enter the message mode, and then press the message request switch 16. A message information signal can be obtained by sending the message request signal generated by the code generation circuit 39 to the message area control base station 22 via the transmitter 38 and the antenna 25. In this case, the electric field strength in the message area can be determined by looking at the electric field strength display, so it is possible to reliably receive the message signal by moving to a position where the received electric field strength is as high as possible. The specific operation of the message request is as follows: When the message request switch 16 is pressed, the switch 42 is connected to the contact (a) and connected to the message display section 13, and outputs a specific pattern signal (for example, a PN signal) generated by the three code generation circuits. The message request signal having the message request signal is transmitted to the message area control base station 22 via the transmitter 38 of the radio [10]. When the message area control base station 22 receives a message request signal,
As shown in FIG. 5, a message information signal is added to the message area electric field strength measurement signal and transmitted to the radio device 10. The message information signal continues to be transmitted until a response signal indicating that the message information signal has been received is received from the wireless terminal 1alo. Message information signal! ! 1. When the wireless device 10 receives the message information signal, the wireless device 10 outputs the message information signal stored in the memory 40 to the message display section 13. When a message is displayed, a signal is sent from the message display unit 13, the contact of the switch 37 is set as the contact (b), and a response signal indicating that the message information signal generated at the code generating port 1?339 has been received is sent to the message area. It is transmitted to the central base station 22.

When the message area control base station 22 receives the response signal, it adds the message information signal to the message area electric field strength measurement signal and stops transmitting the signal. FIG. 6 shows the flow of receiving the message information signal described above.

Therefore, according to this embodiment, since the electric field strength of each of the call area and message area is displayed on the wireless device, it is possible to judge which service can be received, and also display of incoming message and message information. is possible because no &! Even if the device is outside the calling area,
You can receive message service.

〔Effect of the invention〕

As explained above, according to the present invention, the electric field strength at the location within the call area and message area is detected and displayed, and when the electric field strength does not reach a set level and the service cannot be received, the electric field strength is detected and displayed. By displaying this information, it is possible to accurately and quickly judge whether or not service is available.Also, by being able to receive and display messages provided by the base station, it is possible to receive message services even outside the calling area. Therefore, you can receive call services and message services accurately.

[Brief explanation of the drawing]

Fig. 1 is an external view of a radio device according to an example of repair of the present invention;
The figure shows a mobile communication system in a minimal zone configuration, Figure 3 is a signal format for measuring electric field strength in each area, Figure 4 is a circuit block diagram of the above-mentioned line machine, and Figure 5 is a message information signal. Fig. 6 shows the flow of message information signal reception, and Fig. 7 shows the format of the exchange zone, control zone, and line zone in a mobile communication system using a small zone configuration. A diagram showing the relationship, FIG. 8, is a diagram showing a radio device using a conventional display method. DESCRIPTION OF SYMBOLS 10...Radio device 11...Out of range display section 12...Field strength display section 13...Message display section 14...Mode changeover switch 15...Incoming call display section 16...Message request switch 17 ... Transmitting section 18 ... Receiving section 19 ... Message area 20 ... Call area 22 ... Message area control base station 23 ... Call area control base station 25 ... Antenna 26.37 , 41.42... Switch 27... Receiving section 28... Envelope detector 29... Comparator 30... Integrating circuit 31... Median value detection circuit 32.40... Memory 33 ... Level judgment circuit 34 ... Demodulation circuit 35 ... Decoding circuit 36 ... Identification circuit 38 ... Transmission section 39 ... Code generation circuit

Claims (1)

[Claims] A radio device installed in a mobile station that communicates within a message area that includes multiple communication areas, and which detects and displays the electric field strength at the location of the radio device within the communication area and the message area. detection display means; out-of-communications range display means for displaying that the field strength detected by the field strength detection and display means has not reached a set level; and means for receiving and displaying messages from base stations in the call and message area. A wireless device comprising: