JP2981394B2 - Wireless communication equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using a repeater station of a wireless communication device, and more particularly to a means for effectively using the repeater station.

[0002]

2. Description of the Related Art Communication using a repeater station of a radio communication device is performed in the form shown in FIG. Basically, it is a one-to-one (A-to-B in the figure) one-way communication. That is, B is in the receiving state when A is in the transmitting state.

[0003] As shown in the figure, when the local station is a radio communication station A and communicates with a radio communication station B via a repeater station (relay station), the radio communication station A sends F1 (434.64M in the figure).
Hz. This is a frequency determined by each repeater station. (The same applies hereinafter).

[0004] The repeater station receives this signal and converts it to a frequency F2 and transmits it. The wireless communication station B receives the frequency F2. When the radio communication station B transmits, the radio communication station B transmits the signal at the frequency f1, and the repeater station receives the signal and converts it to the frequency f2 and transmits the same. The wireless communication station A receives the frequency f2.

[0005] In this way, the radio communication station A and the radio communication station B communicate with each other. However, if the repeater station is installed at the top of a mountain or the like, the radio communication station A and the radio communication station B can be seen across the mountain. You will be able to communicate outside. F1 at this time
Alternatively, f1 (the same frequency as F1) is called an uplink frequency, and F2 or f2 (the same frequency as F2) is called a downlink frequency, as in the case of satellite communication.

When a certain repeater station is used by stations A and B, the repeater station cannot be used by stations other than the stations A and B. Therefore, it is not permissible to use a highly public repeater station exclusively for a long time.

On the other hand, a radio communication station using a repeater station is a radio apparatus capable of receiving / transmitting data. Therefore, if the partner station is a mobile station, communication can be performed without using the repeater station if the other station comes within a short distance or within a line of sight. Becomes As described above, when it is not necessary to use the repeater station, it is possible to perform communication with sufficient time by switching to direct communication.

[0008] In order to check whether or not direct communication is possible during communication using a repeater station, the conventional wireless communication device turns on the reverse function manually and changes the transmission and reception frequencies. The radio wave from the partner station was directly received.

If the radio wave from the partner station can be received while the reverse function is on, the signal can be received directly. If the reverse function is off, the other party is informed that direct communication is possible. I was switching. In addition, if the radio wave from the partner station cannot be received while the reverse function is on, the reverse function is turned off, and the communication is completed using the repeater station.

[0010]

In order to check whether or not direct communication is possible with the above-mentioned conventional wireless communication device, it takes time and effort to operate an on / off key of a reverse function. There was a drawback that it hindered driving.

Further, while the reverse function is turned on and the transmission frequency of the partner station is being received, the reception of the transmission frequency of the repeater station is interrupted, and information from the partner may not be obtained. .

[0012] The present invention has been made in view of the above points, and a purpose thereof is to automatically determine whether communication is possible without using a repeater station when the repeater station is used. The present invention further provides a wireless communication device having means for searching for a frequency or a channel which is not currently used for communication among communication channels and displaying the frequency.

[0013]

SUMMARY OF THE INVENTION A radio communication device according to the present invention is a radio communication device that communicates using a repeater station that uses different frequencies for the uplink and the downlink. ₂ ) means for receiving the uplink frequency (f ₁ ) of the partner station of the communication by switching the reception frequency at predetermined time intervals during reception of the signal, and communicating with the signal strength of the uplink frequency (f ₁ ) of the partner station. Means for automatically judging that the signal strength is sufficient to maintain the frequency, the downlink frequency (f ₂ ) from the repeater station, and the uplink frequency (f ₁ ) of the partner station of communication using the downlink frequency. When both can be received, it is equipped with a means for searching for a frequency or channel not currently used for communication in the communication channel and displaying the frequency. That.

Further, the radio communication device of the present invention is a radio communication device for performing communication using a repeater station using different frequencies for the uplink and the downlink. while receiving downlink frequency (f ₂₎ from the repeater station, means for receiving the uplink frequency of counterpart station of the communication (f ₁₎ at the other receiving circuit, the other station of the uplink frequency (f ₁ ) Means for automatically determining that the signal strength is sufficient to maintain the communication, a downlink frequency (f ₂ ) from the repeater station, and an increase in the communication partner station using the downlink frequency. when both link frequency (f ₁₎ can be received, means for displaying the frequency searching for frequency or channel in the communication channel is not being used for communication currently It includes those were.

[0015]

According to the radio communication apparatus of the present invention, when the repeater station is used, the operation for confirming whether or not it is possible to directly communicate with the partner station is performed at regular intervals or constantly, so that it is confirmed when the mobile station is communicating. This is convenient because it saves time and effort or prevents information from being interrupted. Also, safe operation of the car is ensured.

Further, when both the downlink frequency from the repeater station (f ₂₎ with the opposite station of the uplink frequency of the communication using the downlink frequency (f ₁₎ can be received, the current in the communication channel Since a means for searching for a frequency or channel not used for communication and displaying the frequency is provided, the trouble of searching for a free frequency or channel is omitted, which is more convenient.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A radio communication device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram showing a wireless communication device according to a reference example of the present invention. In FIG. 1, reference numeral 1 denotes an antenna, which sends a signal of a received radio wave to the receiving circuit 4 and radiates a signal from the transmitting circuit 3 as a radio wave.

The transmission frequency of the transmission circuit 3 is controlled by the microcomputer 6, and the audio signal from the microphone 2 is converted into a transmission frequency and transmitted to the antenna 1. The receiving frequency of the receiving circuit 4 is controlled by the microcomputer 6, the signal from the antenna 1 is converted into an audio signal, and the speaker 5 is driven. The receiving circuit 4 further outputs to the microcomputer 6 a signal indicating whether or not the signal of the currently received frequency can be received.

The microcomputer 6 controls the transmission circuit 3 and the reception circuit 4 as described above based on commands from the operation circuit 8 including key switches and knobs, and also displays a transmission frequency and a display indicating whether direct communication is possible or not. Is displayed on the display circuit 7 having the section.

Next, the operation of the radio will be described with reference to FIG. When communication using a repeater station is started, first, in step S1, the transmission / reception frequency is matched with the frequency of the repeater station to be used, and a shift width and a tone frequency are set.

Next, in step S2, the operation circuit 8
Turn on the auto simplex check function (function for automatically checking whether direct communication is possible) by using the keys, turn on the auto simplex check function display, and start the unit time timer. The display of the auto simplex check function is performed by the display unit 7a or the display unit 7 shown in FIG.
b. The wireless device of the above reference example has a two-band transmitting / receiving circuit, and the display unit 7a or 7b corresponds to each band, and the display unit of the band to be used is lit.

Next, in step S3, it is determined whether or not the transmission radio wave from the repeater station can be used. If the transmission radio wave from the repeater station can be used, proceed to step S4,
If not, step S3 is repeated.

In step S4, it is determined whether or not the unit time has elapsed. If not, step S3 is repeated, and if it has elapsed, the process proceeds to step S5. In step S5, a check process is performed to determine whether the transmission radio wave of the partner station can be directly received. That is, the receiving frequency is switched to the transmission radio frequency of the partner station for a short period.

Next, in step S6, it is determined whether or not the transmission radio wave of the partner station can be directly received. If not, step S3 is repeated, and if possible, step S7 is performed.
Move to In step S7, the display unit 7a or the display unit 7b blinks. A beep sound may be emitted from the speaker 5 together with or instead of the blinking of the display unit. Step S3 is repeated after step S7.

In this manner, it is automatically determined whether or not the transmission radio wave of the partner station can be directly received. If the reception radio wave can be directly received, it is possible to search for an empty frequency and switch to direct communication.

Next, a radio communication device according to a first embodiment of the present invention will be described with reference to FIG. In this example, step S1
The operation from step S6 to step S6 is the same as in the reference example described above. In step S6, if the transmission radio wave of the partner station can be directly received, the process proceeds to step S8.

In step S8, the reception frequency is changed to check for a signal on an empty channel, and the flow advances to step S9. If it is determined in step S9 that the checked frequency is an empty channel, the process proceeds to step S13, where the display unit 7a or the display unit 7b flashes and the frequency is displayed.

In step S9, if it is determined that the checked frequency is not an empty channel, the flow shifts to step S10 to determine whether or not the frequency check of all channels has been completed. If not, step S8 is repeated. If the processing has been completed, the process proceeds to step S11.

In step S11, a beep sound is output to notify the user that there is no available channel, and then step S3 is repeated. As described above, when direct communication is possible, the available channel is automatically checked, so that the user informs the other party of the channel and switches to direct communication using the frequency.

FIG. 6 is a block diagram showing a wireless communication apparatus according to a second embodiment of the present invention. This embodiment is an example in which a two-band communication device is applied to the present invention, and two receiving circuits A and B can be used as receiving circuits. Usually, two frequency bands are received, but the frequency of transmission and reception of the repeater station can be received by switching. A
A signal indicating that both the receiving circuit and the B receiving circuit can receive the signal of the tuning frequency is sent to the microcomputer 6.
Output to Other configurations are the same as those shown in FIG.

When communication is performed via a repeater station using this communication device, first, repeater specifications such as a repeater frequency and a shift width are set on the receiving circuit A side. Next, the auto simplex check function is turned on using the key of the operation circuit 8, and the auto simplex check function display is turned on. At this stage, the receiving circuit B switches so as to receive the transmission frequency of the communication partner determined by the specifications of the repeater set by the receiving circuit A.

Thereafter, the receiving circuit A receives the transmission frequency of the repeater station, and the receiving circuit B receives the transmission frequency of the communication partner, and sends a signal to the microcomputer 6 to determine whether or not reception is possible. When a signal indicating that the transmission frequency of the communication partner is receivable is input, the microcomputer 6 blinks the auto simplex check function display. Then, similarly to the first embodiment, when direct communication is possible, an empty channel is automatically searched for and its frequency is displayed.

In this embodiment, since two frequencies are continuously received by two receiving circuits, it is not necessary to control the receiving frequency to be switched by the single receiving circuit for each unit time.
In addition, it is possible to completely eliminate the possibility of overlooking information from the other party for confirming whether or not direct communication is possible.

[0034]

According to the wireless communication device of the present invention, it is automatically checked whether or not communication is possible without using a repeater station, so that complicated key operations are not required. Therefore, safe operation is ensured in the case of the on-vehicle use, and since the confirmation is always performed, the effective use of the repeater station for the public is promoted.

Further, as compared with the conventional communication device, the time during which reception from the repeater station is interrupted for confirming whether or not communication without using the repeater station is possible is shortened, or the information is not heard at all. Disappears.

Then, when both the downlink frequency (f ₂ ) from the repeater station and the uplink frequency (f ₁ ) of the partner station of the communication using the downlink frequency can be received, the current channel in the communication channel is received. Since a means for searching for a frequency or channel not used for communication and displaying the frequency is provided, the trouble of searching for a free frequency or channel is omitted, which is more convenient.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a state of a radio wave when communication is performed using a repeater station.

FIG. 2 is a block diagram showing a wireless communication device according to a reference example of the present invention.

FIG. 3 is a flowchart showing an operation of the wireless communication device.

FIG. 4 is a flowchart showing the operation of the wireless communication device according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a display unit of a wireless communication device according to a reference example of the present invention.

FIG. 6 is a block diagram showing a wireless communication device according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 antenna 2 microphone 3 transmission circuit 4 reception circuit 5 speaker 6 microcomputer 7 display circuit 8 operation circuit

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 7/14-7/26 H04Q 7/00-7/38

Claims (2)

(57) [Claims] 1. A wireless communication device that communicates using a repeater station that uses different frequencies for an uplink and a downlink.
Means for receiving the other station of the uplink frequency of the communication (f ₁₎ while receiving ₂₎ by switching the receiving frequency at predetermined time intervals, of the other station the uplink frequency (f ₁₎
Means for automatically determining that the signal strength is sufficient to maintain communication, a downlink frequency (f ₂ ) from a repeater station, and an uplink of a communication partner station using the downlink frequency. A wireless communication device having means for searching for a frequency or channel not currently used for communication in a communication channel and displaying the frequency when both frequencies (f ₁ ) can be received. 2. A wireless communication device for performing communication using a repeater station that uses different frequencies for the uplink and the downlink, comprising two systems of receiving circuits, one of which receives a downlink frequency from the repeater station ( While receiving the signal f ₂ ), the other receiving circuit receives the uplink frequency (f ₁ ) of the partner station of the communication and the signal strength of the uplink frequency (f ₁ ) of the partner station maintains the communication. Means for automatically determining that the signal strength is sufficient, and both the downlink frequency (f ₂ ) from the repeater station and the uplink frequency (f ₁ ) of the communication partner station using the downlink frequency. A wireless communication device having means for searching for a frequency or channel not currently being used for communication in a communication channel and displaying the frequency when the signal can be received.