JPH03235437A - Simple land mobile radiotelephony terminal - Google Patents

Abstract

PURPOSE:To execute operation to meet a user by selecting and setting the setting of an N mode or a W mode by a mode switching setting circuit through the key operating panel of a telephone set, and regulating call originating and call incoming by supervising the intensity of a received electric field in the course of waiting operation. CONSTITUTION:A control part 20 is provided with the mode switching setting circuit 21A to set the N mode to attach importance to the certainty of channel connection and the W mode to attach importance to the wideness of the connection range of a zone to a squelch supervising part 22, a line connection control part 23, and a display processing part 24. Electric field intensity falls, and a squelch detecting part 11 detects the fall of the electric field intensity, and when NSQ continues longer than set time in the squelch supervising part 22, the NSQ is considered to have been detected. At the time of the detection of the NSQ, the call originating and the call incoming are regulated, and simultaneously, the display processing part 24 is controlled so as to display out-of-communication-range on the display panel 33 of the telephone set 30. Since the level of the electric field intensity to regulate the call originating and the call incoming is switched and set by the mode switching setting circuit 21A, the operation to meet the user can be executed.

Description

[Detailed Description of the Invention] [Summary] Regarding a simple land mobile radio telephone terminal that performs radio telephone communication using a single medium zone method with a base station, a narrow mode and a zone emphasizing reliability of communication path connection are provided. Wide mode, which emphasizes the wide connection range, is set, and the field strength of the received radio waves is monitored during standby mode, and it is detected that the field strength of the received radio waves has fallen below the set field strength. The purpose of this terminal is to provide a simple land mobile radio telephone terminal that sometimes restricts incoming and outgoing calls and displays on the display of the telephone that it is out of communication range. A mode switching setting means is provided to set a wide mode that emphasizes the wide connection range of the zone, and by operating the key operation panel of the telephone, the mode switching setting means is used to select and set one of the modes, and the base station The squelch detection unit monitors the field strength of the received radio waves during standby, and when a noise squelch is detected for a set period of time or longer, the system prohibits incoming and outgoing calls and sends an output from the control unit indicating that the device is out of communication range. Configure to display on the phone's display panel.

[Industrial application field]

The present invention relates to a simple land mobile radio telephone terminal that performs single medium zone radio telephone communication with a base station.

Convenience R
adi.

The Phone (hereinafter referred to as CRP) system is a system for small and medium-sized cities in rural areas, and is characterized by ■ Single medium zone system (20-30 km) ■ Limited communication time (1-5 minutes) ■ Low charges. This is a car phone system that

In such CRP systems, there is a demand for improvement in call quality, and it is common for users to place emphasis on ensuring that calls do not drop during calls. Because of this, some users prioritize being able to make and receive calls even if they are disconnected during communication.

Narrow mode,
There is a need for a simple land mobile radio telephone terminal that can be set to one of the wide modes to regulate incoming and outgoing calls.

[Conventional technology]

FIG. 4 is a block diagram explaining the conventional example, and FIG. 5 is a flowchart explaining the operation of the conventional example.

The conventional example shown in FIG. 4 includes a wireless section 10 consisting of a wireless transceiver 12 that transmits and receives radio waves to and from a base station l (not shown) and a squelch detector 11, and a squelch detector that monitors the output of the squelch detector 11. Monitoring section 22 and squelch monitoring section 22
a line connection control unit 23 that performs line connection regulation when detecting a decrease in electric field strength; and a display processing unit 2 that performs display control.
This is an example of a telephone set 30 consisting of a control section 2OA consisting of 4, a telephone section 31 for making calls, a key operation panel 32 for dialing and mode setting, and a display panel 33 for making various displays.

The operation shown in FIG. 4 will be explained with reference to the operation flowchart of the conventional example shown in FIG.

■ Turn on the power.

■ Perform initial settings for the detection time of received electric field drop.

(For example, for 5 seconds) ■ The wireless transceiver 12 acquires the control channel and enters standby operation.

■ The control channel is monitored to see if there are any incoming or outgoing calls, and if there are no incoming or outgoing calls, the standby operation of (2) is continued.

■ When an incoming/outgoing call is detected in (2), the control unit 20A performs connection processing.

(2) After the connection process is completed, the communication unit 31 performs a communication with the base station 1.

■ The control unit 2OA monitors whether there is a call termination or disconnection request.

■ When the call ends or there is no disconnection request, the call continues, so the squelch detector 11 monitors the received field strength during the call, and the output is set at the time set in ■, for example 5.
When the squelch monitoring unit 22 detects that the squelch has continued for more than a second, it is determined that noise squelch (hereinafter referred to as NSQ) has been detected.

When NSQ is not detected, the electric field strength is at a level that allows normal communication, so the process returns to step (3) and continues the communication operation.

■ End of call or occurrence of disconnection request in ■, and NS in ■
When Q is detected, the control unit 2OA performs a call termination or disconnection operation, returns to step (2), acquires the control channel, and enters standby operation.

[Problem to be solved by the invention]

In the conventional example described above, the control channel is received during the standby operation, but the received electric field strength at this time is not monitored.

Therefore, in places where the electric field strength is weak, although connection operation can be performed by controlling the control channel,
There is a possibility that the line will be disconnected due to the detection of received field strength per second.

The present invention sets either a narrow mode (hereinafter referred to as N mode) that emphasizes the reliability of communication path connection or a wide mode (hereinafter referred to as W mode) that emphasizes the wide connection range of the zone. monitors the field strength of received radio waves during standby mode, and when it detects that the field strength of received radio waves has fallen below the set field strength, it restricts incoming and outgoing calls and displays on the display of the phone that it is out of communication range. The purpose of the present invention is to provide a simple land mobile radio telephone terminal.

[Means to solve the problem] FIG. 1 shows a block diagram illustrating the invention in detail.

In the block diagram of the principle of the present invention shown in FIG. 1, 10 is a wireless unit that communicates with the base station 1 via a wireless line and has a squelch detection unit 11 that determines the field strength of the received radio waves. 30 is a telephone set having a communication section 31, a key operation panel 32, and a display panel 33; 21 is a telephone set provided in the control section 20 for selecting either N mode or W mode; This is a mode switching setting means for setting the mode, and by providing such means, it is a means to solve this problem.

(Function) By operating the key operation panel 32 of the telephone 30, the mode switching setting means 21 selects and sets either the N mode or the W mode.

The radio unit 10 monitors the electric field strength of the received radio waves from the base station 1 with the squelch detection unit 11 during standby, and when it detects that the NSQ has continued for more than the time set for each, the control unit 2o prohibits incoming and outgoing calls, and displays on the display panel 33 of the telephone 30 that the telephone 30 is out of communication range.

In other words, for users who place importance on connecting reliably and completing calls, set N mode, and for users who place importance on being able to make and receive calls rather than being disconnected during a call. The W mode is set, and the field strength of the received radio waves for connection regulation is set according to each user's usage.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 2 and 3.

FIG. 2 shows a block diagram explaining the invention in detail, and FIG. 3 shows a flowchart explaining the invention in detail. Note that the same reference numerals indicate the same objects throughout the figures.

The squelch detection section 11 of the embodiment of the present invention shown in FIG.
The radio section 1o consisting of a radio transmitter/receiver 12, the telephone 3o consisting of a talking section 31, a key operation panel 32 and a display panel 33 are the same as the conventional example explained in FIG.

The control unit 20 has the squelch monitoring unit 22, the line connection control unit 23, and the display processing unit 24 described in the conventional example in FIG. A mode switching setting circuit 21A is provided to set the W mode that emphasizes quality. The operation of the embodiment of the present invention shown in FIG. 2 will be explained according to the flowchart shown in FIG.

■ Turn on the power.

(2) Set the mode of the mode switching setting circuit 21A using the key operation panel 32 of the telephone 30.

■ Check whether the setting is W mode or not.

■ When the setting is W mode, the squelch monitoring section 22
Set the monitoring timer to W mode (for example, 10 seconds).

■ When the setting is N mode, the squelch monitoring section 22
Set the monitoring timer to N mode (for example, 5 seconds).

Here, the field strength of the received radio waves is monitored not by monitoring the absolute level of the field strength, but by monitoring the NSQ detection time.

■ The wireless transceiver 12 captures the control channel and enters standby operation.

■ Monitor the control channel to see if there are incoming or outgoing calls.

■ When there are no incoming or outgoing calls, the standby operation continues.
When the electric field strength decreases, the squelch detection section 11 detects the decrease in the electric field strength, and the squelch monitoring section 22 detects the decrease in the electric field strength.
When NSQ continues for more than the time set in ■ and ■, NS
It is assumed to be Q detection.

If NSQ is not detected, it is possible to make and receive calls normally, so the process returns to step (3) and the standby operation continues.

(2) When NSQ is detected in (2), incoming and outgoing calls are restricted, and the display processing 24 is controlled to display on the display panel 33 of the telephone 30 that the telephone is out of range.

[Phase] When an incoming/outgoing call is detected in step (3), the control unit 20 performs connection processing.

(2) After the connection process is completed, the communication unit 31 performs a communication with the base station 1.

@ The control unit 20 monitors whether there is a call termination or disconnection request.

@ When the call ends or there is no disconnection request, the squelch detector 11 monitors the received input electric field during the call, and when the squelch monitor 22 detects that the output has continued for more than the timer value set in ■ and ■ , NSQ detection.

If NSQ is not detected, the call operation is normally possible, so the process returns to step (3) and continues the call operation.

[Phase] When a call termination or disconnection request is generated at @ and an NSQ is detected at @, the control unit 20 performs a call termination or disconnection operation, returns to step (3), acquires the control channel, and enters standby operation.

As described above, by switching and setting the level of electric field strength for regulating incoming and outgoing calls using the mode switching setting circuit 2LA,
It is possible to perform operations according to the user.

〔Effect of the invention〕

According to the present invention as described above, in the mode switching setting circuit,
By selecting and setting the N mode and W mode from the key operation panel of the telephone, monitoring the received field strength during standby operation, and regulating incoming and outgoing calls, operations can be performed according to the user.

[Brief explanation of drawings]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram explaining the present invention in detail, FIG. 3 is a flowchart explaining the operation of the embodiment of the present invention, and FIG. 4 is a conventional example. FIG. 5 shows a block diagram explaining the operation of the conventional example, and FIG. 5 shows a flowchart explaining the operation of the conventional example. In the figure, 1 is a base station, 2 is a CRP telephone terminal, 10 is a radio section, 11 is a squelch detection section, 12 is a radio transceiver, 20 is a control section, 21 is a mode switching setting means, 21A is a mode switching setting circuit, 22 is a squelch monitoring section, 23 is a line connection control section, 24 is a display processing section, 30 is a telephone, 31 is a communication section, 32 is a key operation panel, 33
indicates the display panel, and indicates the display panel, respectively. ＼ ≧＼ Bronch diagram explaining the present invention in detail Flowchart explaining the embodiment of the present invention

Claims (1)

[Scope of Claims] A simple land mobile radio telephone terminal (2) that performs single medium zone radio telephone communication with a base station (1), comprising: A radio unit (10) having a squelch detection unit (11) that performs communication and determines the field strength of the received radio waves, and a control unit (10) that performs line connection control.
20) and a telephone (30) having a talking section (31), a key operation panel (32), and a display panel (33), the control section (20) having: A key operation panel (32) of the telephone (30) is provided with a mode switching setting means (21) for setting a narrow mode that emphasizes the reliability of the call path connection and a wide mode that emphasizes the wide connection range of the zone. Through the operation, the mode switching setting means (21) selects and sets one of the modes, and the squelch detection section (11) monitors the field strength of the received radio waves from the base station (1) during standby. When a noise squelch is detected for a set period of time or longer, incoming and outgoing calls are prohibited, and an output from the control unit (20) indicates on the display panel (33) of the telephone (30) that the communication area is out of range. A simple land mobile radio telephone terminal characterized by displaying the following: