JPH038611B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a personal radio device, and more particularly to a personal radio device that automatically measures the traffic of a speech channel.

[Conventional technology]

As shown in Figure 1, the personal wireless device is
It is composed of a CPU 1, RAM 2, ROM 3, display 4, and PLL circuit 5. Transmission and reception are performed using the number buttons _K0 to _K9 provided on the number board 6, the data button _K10 and address button _K11 , and the monitor button provided on the operation panel.
K ₁₂ , recall button K ₁₃ , hold button K ₁₄ , PTT button
This is accomplished by inputting requests set with K ₁₅ , call button K ₁₆ , reset button K _{17 ,} etc. to CPU 1 via I/O buffer 9, . . . , data bus 7. CPU
Input to 1 also includes information from the code receiver 12 and analog-to-digital converter 13 connected to the output side of the wave detector 26 of the reception system via the I/O buffer 10, . . . The calculation output by CPU1 is I/
Terminal 5 of PLL circuit 5 via O buffer 11
There is frequency information sent to a. This frequency information is switched by a transmission/reception switch 14 controlled by the CPU 1 and used for transmission or reception. In the transmission system, the output of the audio circuit 18 is normally cut off by the transmission switch 15. The code generator 16 and transmission switch 15 are controlled by the calculations of the CPU 1, and control signals and audio signals are transmitted.

Personal radio has a control channel (frequency is
903.0125MHz, radio wave format F ₂ ) and communication channels (frequency 903.0125MHz, 79 channels in 25kHz width, radio wave format F ₃ ). When the power is turned on, the standby operation program shown in FIG. 2 is executed and the device waits on the control channel. The control signals used for transmission and reception are bit synchronization signal (50 bits), frame synchronization signal (15 bits), and data (172 bits).
Consists of. Further, the data is formed by a group number code (20 bits), a channel code (8 bits), and a call code (48 bits, referred to as an ATIS code). When the group number code of the received control signal matches the group number set in advance using the numeric buttons K ₀ to K ₉ and the data button K ₁₀ , the standby operation program passes the A connection path to the capture operation program (Fig. (not shown). The acquisition operation program starts the received call operation program (not shown).

When the call button _K16 is operated, a call request is made.
In this case, the calling operation program is activated via the B connection path. The calling operation program has a function of transmitting a control signal from a control channel, and this control signal includes a calling group number code and a randomly determined channel code. When the transmission of the control signal is completed, the capture operation program is started and a communication channel is set according to the channel code.

When monitor button _K12 is operated, a reception request is made. In this case, the reception program shown in FIG. 3 is activated via the C connection. The reception operation program is
11 channels are randomly selected from the 79 communication channels, and it is determined whether the receiver input voltage for the selected communication channels is greater than or equal to a certain threshold. If a receiver input voltage equal to or higher than the threshold value cannot be obtained, a new communication channel is selected, and this operation is repeated until the desired communication channel is obtained. If the receiver input voltage above the threshold is obtained, the communication channel is not changed.
In this state, the conversation between the caller and the called party can be monitored by the speaker 28. However, since the transmission switch 15 is inactive, it is impossible for a third party to intervene in the call. The sending and receiving personal wireless devices during a call are each controlled by a call operation program. Call operation program is PTT button
Sends control signals in response to _K15 operations. A third party who is monitoring receives this control signal, and when the standby group number code being set and the group number code of the control signal match, a call operation program is activated via the D connection path. It is possible to intervene in a two-party call by running a call operation program.

[Problem to be solved by the invention]

The personal radio device described above has the disadvantage that it cannot measure the traffic of the communication channel. SUMMARY OF THE INVENTION It is an object of the present invention to provide a personal wireless device that can eliminate these drawbacks and automatically measure the traffic of a communication channel.

[Means to solve the problem]

The present invention is provided with a starting means for automatically starting a receiving operation program for monitoring when the operating member is inactive. Moreover, when the operating member becomes active, the activation means is restored. Since the receiving operation program has a busy detection function, this function is used to count the number of traffic observations and the busy detection frequency.

〔Example〕

An embodiment of a personal wireless device according to the present invention will be described in detail with reference to a flowchart.

FIG. 4 is a flowchart of the traffic activation subroutine. The traffic activation subroutine is activated via the _Z1 connection indicated by the dotted line in FIG. When the traffic start subroutine is executed, the process returns to the standby operation program via the _Z2 connection path.

When the traffic start subroutine is executed, it is determined whether the number buttons _K0 to _K9 on the number board 6, the data button _K10 , and the address button _K11 are active or inactive. When 4 seconds have elapsed since the transition from active to inactive and the marker with a period of 3 minutes operates, the receiving operation program shown in FIG. 5 is activated via the C' connection path. At this time, the A counter that counts the busy frequency and the B counter that counts the idle frequency are initialized, and a program indicator PI used for branching judgment of the activated receiving operation program is set.
Set to 1. When the program indicator PI value is 1, it is a traffic monitor, and when it is 0, it is a normal monitor. When branching to traffic observation, the A counter is used for busy periods, and the B counter is used for empty periods. When the total value of the A counter and B counter becomes 79 or more, the counted value is processed in the traffic data recording subroutine. After the processing is completed, the program indicator PI is set to 0 and the program returns to the standby operation program via the _Z2 connection path.

Settings for call channels are done randomly, and all call channels are cycled through after 79 settings. Therefore, from the perspective of the observer, 1
This is the same as performing sequential scanning from channel to channel 79, and the obtained vacancy or occlusion data will have the same value as the observation of vacancy occlusion by normal scanning. Units are expressed in erlangs. Among the operation buttons, monitor button K ₁₂ , recall button ₁₃ , hold button ₁₄ ,
The PTT button _K15 , the call button 16, and the reset button 17 return to the standby operation program via the Z connection path in accordance with their operations. Therefore, the PTT button _K15, etc., which are related to the operation sequence of the sending/receiving program, the numeric buttons _K0 to _K9 , the data button _K10 , and the address button
If something unrelated to the operation sequence of the transmission/reception program such as K ₁₁ is operated at the same time, the transmission/reception program such as PTT button K ₁₅ is executed with priority.

In the above embodiment, the traffic activation subroutine is activated automatically when no call request or reception request is issued and no control signal is received _.
The flowchart shown in Fig. 5 is executed from the connecting path via the traffic start subroutine shown in Fig. 4, but the flowchart shown in Fig. 5 is not limited thereto. Alternatively, it is also possible to set a level priority so that observation is interrupted in response to a request to start another priority program.

〔Effect of the invention〕

The personal wireless device according to the present invention includes a starting means for starting a receiving operation program for monitoring when a monitor mode is selected, and a counting means for counting the busy frequency detected by the receiving operation program for monitoring. Because of its configuration, it has the feature of being able to simultaneously measure traffic while monitoring.

Therefore, it is possible to obtain highly reliable traffic data, and proper operation of the personal wireless device can be expected.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a personal wireless device, FIG. 2 is a flowchart of a conventional standby operation program used in the personal wireless device of FIG. 1, and FIG. 3 is a flowchart of a conventional reception operation program.
FIG. 4 is a flowchart showing an embodiment of a traffic activation subroutine used in a personal wireless device according to the present invention, and FIG. 5 is a flowchart of a reception operation program showing an embodiment of the present invention. 1...CPU, 2...RAM, 3...ROM, 4
... Display, 5 ... PLL circuit, 6 ... Number board, 7 ... Data bus, 8 ... Address bus,
9, 10, 11... I/O buffer, 12... Code receiver, 13... Analog-to-digital converter, 1
4... Transmission/reception switch, 15... Transmission switch, 1
6... Code generator, 17... Microphone, 18, 27
...Audio circuit, 19...Modulator, 20,2
4...Frequency mixer, 21...High frequency amplifier, 2
2...Antenna, 23...RF unit, 24...
... Intermediate frequency circuit, 26 ... Detector, 28 ... Speaker, 29 ... Reference signal generator, 30 ... Phase comparator, 31 ... Low pass filter, 32 ... Voltage controlled oscillator, 33 ... Programmable counter,
K ₀ to K ₉ ...Numeric buttons, K ₁₀ ...Data buttons, K ₁₁ ...
Address button, K ₁₂ ... Monitor button, K ₁₃ ... Recall button, K ₁₄ ... Hold button, K ₁₅ ... PTT button,
_K16 ...Call button, _K17 ...Reset button.

Claims (1)

[Scope of Claims] 1. A reception operation program including a communication channel selection means and a busy communication channel detection means for detecting whether the communication channel selected by the communication channel selection means is busy, and the reception operation. In a personal radio device having a function of selecting a monitor mode for selecting a program and a transmitting/receiving mode, the receiving operation program starting means starts the receiving operation program when the monitor mode is selected, and the busy call channel 1. A personal radio device comprising: a counting means for counting the busy detection frequency related to the detecting means, and configured to measure the traffic of a communication channel.