JP3160056B2 - Frequency setting method and device for full-duplex wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system, and more particularly, to a full-duplex (FDX) radio system which uses different frequency bands as a transmission frequency and a reception frequency and can communicate simultaneously. The present invention relates to a frequency setting method in communication and a wireless communication device using the method.

[0002]

2. Description of the Related Art In a full-duplex wireless communication, as shown in FIG. 9, the transmission (TX) frequency and the reception (RX) frequency of radio communication devices A and B are different from those of B if the transmission frequency of A is f1N. The transmission frequency is f2N, the reception frequency of A is f2N, the transmission frequency of B is f1N, and if the transmission frequency of A is f2N, the transmission frequency of B is f1N, the reception frequency of A is f1N, and the transmission frequency of B is f2N. As such, they are stipulated to be opposite each other.

[0003] Like a mobile phone, the base station and the mobile station are each C
In the case of a communication system that is connected one-to-one through H (channel), the rising (slave unit transmission frequency) and descending (slave unit transmission frequency) frequencies of each CH are used, and these two frequencies are designed. Has already been specified. Therefore, there is no need to consider which of the two frequencies to select during use.

On the other hand, in a full-duplex wireless communication device such as a specific low power transceiver, the values of f1N and f2N of each channel are determined only by the standard, and the designation of the rise and fall of the base station and the mobile station is not possible. It cannot be determined uniformly for each device. In other words, since only the combination of frequencies is determined for each channel, the frequency relationship such as which device among the wireless communication devices to communicate with uses the frequency f1N as the transmission frequency is not determined. To be able to talk, the user needs to talk 2
It was necessary to set before the call whether the transmission frequency and the reception frequency between the two wireless communication devices A and B were f1N or f2N, respectively.

[0005]

However, in the above-described full-duplex wireless communication apparatus, when the communication partner is changed, the transmission frequency and the reception frequency of the two wireless communication apparatuses are set to either f1N or f2N, respectively. There was a problem that the setting procedure was complicated. For example, if it is assumed that the wireless communication device A is used as a master unit and B and C are used as slave units, even if a call is attempted between B and C, the combination of frequencies is A and B, and A and C Is set up so that it is possible to make a call between B and C. However, even if an attempt is made to make a call between B and C, f1N is the transmission frequency and f2N is the reception frequency between B and C. Occurred.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a method of automatically setting a transmission frequency and a reception frequency of a full-duplex wireless communication device on the communication device side, and to provide the communication device. Aim.

[0007]

In order to achieve the above object, a frequency setting method for a full-duplex wireless communication apparatus according to the present invention comprises the steps of: selecting a plurality of channels comprising a combination of first and second frequencies; In a full-duplex communication system capable of selecting one channel and performing simultaneous communication between two wireless communication devices, the method includes the following steps. (1) driving the receiver of the full-duplex wireless communication device waiting for reception at the first frequency. (2) When the smoke line frequency detection signal is included in the output of the receiver, the frequency is set according to the following step (5), and when the radio frequency detection signal is not included, the step (3) below is performed. Steps to perform. (3) driving the receiver of the wireless communication device at a second frequency. (4) If the radio frequency detection signal is included in the output of the receiver, set the frequency according to the following (5 ′) step,
Steps (1) to (4) are repeated when the radio frequency detection signal is not included. (5) setting a first frequency as a reception frequency of the wireless communication device and setting a second frequency as a transmission frequency of the wireless communication device; (5 ′) setting the second frequency as the reception frequency of the wireless communication device and setting the first frequency as the transmission frequency of the wireless communication device.

It is preferable that the embodiment of the present invention includes the following step after step (4) in the frequency setting method for a full-duplex wireless communication apparatus. (4-1) A step of comparing the value of the input control signal with the unique value of the wireless communication device waiting for reception, and executing the above steps (3) and (4) if they do not match.

Further, the full-duplex wireless communication apparatus according to the present invention selects one channel from a plurality of channels composed of the first and second frequency combinations and allows simultaneous communication between the two wireless communication apparatuses. In a possible full-duplex communication system, a channel selection unit, an antenna, a transmission / reception branching unit for sharing the antenna for transmission / reception, and a frequency carrier of a set reception frequency via the antenna and the transmission / reception branching unit Receiving means for inputting and outputting a signal including a radio frequency detection signal, a control means, and a transmitting means for outputting a frequency carrier of a set transmission frequency and transmitting via the transmitting / receiving demultiplexing means and an antenna. Wherein the control means comprises:
During a reception signal waiting time, when a radio frequency detection signal is included in a signal for assigning the first frequency and the second frequency to the receiver as a reception frequency alternately and an output of the receiver, A receiving frequency setting means for transmitting a signal for setting a frequency assigned to the receiver as a receiving frequency to the receiver, and when the output of the receiver includes a radio frequency detection signal, the other one of the frequencies is used. Transmission frequency setting means for transmitting a signal having a transmission frequency to a transmitter, wherein the transmission / reception demultiplexing means switches the transmission / reception frequency band based on a switching signal from the control means.

[0010]

According to the above structure, in the frequency setting method for a full-duplex wireless communication apparatus according to the present invention, the receiver of the wireless communication apparatus awaiting reception is driven at the first frequency, and the output of the receiver includes a radio frequency detection signal. Is included, the first frequency is set as the reception frequency of the wireless communication device, the second frequency is set as the transmission frequency of the wireless communication device, and the communication state is set. If the radio frequency detection signal is not included, the receiver of the radio communication device is driven at the frequency of 2, and if the radio frequency detection signal is included in the output of the receiver, the second frequency is set to the above value. The reception frequency of the wireless communication device is set, and the first frequency is set as the transmission frequency of the wireless communication device. If no radio frequency detection signal is included, the reception wait state is continued.

Further, in a full-duplex wireless communication apparatus according to the present invention, one channel is selected from a plurality of channels by a channel selecting means, and a receiving means sets via an antenna and a transmitting / receiving branching means. The received frequency carrier of the received frequency is input and a signal including a radio frequency detection signal is output. Then, the reception frequency setting means included in the control means sends a signal for allocating the first frequency and the second frequency to the receiver alternately as the reception frequency during the reception signal waiting time. Then, when the radio frequency detection signal is included in the output of the receiver, a signal for setting the frequency assigned to the receiver as the reception frequency is transmitted to the receiver. At this time, the transmission frequency setting means included in the control means sends a signal for setting the other frequency as the transmission frequency to the transmitter. Then, the transmission / reception demultiplexing means switches the transmission / reception frequency based on the switching signal from the control means, and shifts to a call state.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a full-duplex wireless communication system,
Since the call originates by itself, the full-duplex wireless communication apparatus is in a reception waiting state until a signal of the other party is received. Therefore, at this time, the receiver of the full-duplex wireless communication apparatus is intermittently driven at two frequencies f1N and f2N as shown in FIG. As described above, when there is an incoming call when the two frequencies are intermittently driven, the receiver detects a radio frequency (hereinafter, referred to as RF) and an RF detection signal as shown in FIGS. Is output. The basic principle of the method of the present invention is to set the reception frequency and the transmission frequency using the timing of detection of the RF detection signal.

Embodiment 1 FIG. 1 is a flowchart showing a frequency setting process by a frequency setting method for a full-duplex wireless communication apparatus according to the present invention. In FIG. 1, the wireless communication device selects one channel from a plurality of channels composed of a combination of the first frequency f1N and the second frequency f2N, and performs simultaneous communication between the two full-duplex wireless communication devices. In step 1, the receiver of the wireless communication apparatus waiting for reception is driven with the frequency f1N as the reception frequency, and in step 2, an incoming call is received during driving by f1N, and the output of the receiver includes the RF detection signal. If so, in step 5, the reception frequency is set to f1N, the transmission frequency is set to f2N, the reception waiting state is released, and the communication state is entered.

If there is no incoming call in step 2 (no RF detection signal is included), in step 3 the receiver of this radio apparatus is driven with the frequency f2N as the receiving frequency. If there is an incoming call and the RF detection signal is included in the output of the receiver, the receiving frequency is set to f2N and the transmitting frequency is set to f1N in step 5 '.
Cancels the reception waiting state and shifts to the call state.

If there is no incoming call in step 4 (the RF detection signal is not included), steps 1 to 4 are repeated to drive the receiver intermittently at two frequencies f1N and f2N to continue the reception waiting state. Let it.

<Embodiment 2> In the above embodiment, although the frequency can be automatically set, it is not confirmed whether or not the transmitting party is calling the receiver. In other words, the other party is not automatically checked whether the other party is a true call party, but the user confirms and identifies the other party by voice.

On the other hand, FIGS. 3 and 4 show flowcharts for automatically confirming the other party. In many cases, the automatic confirmation uses a control signal as a self-other identification means. For example, a code having the same frequency as the reception frequency is used as the control signal in order to effectively use the frequency, and a tone (TSQ; audible frequency) is used. Signals may be used.
3 and 4, a code signal and / or tone signal having the same frequency as the reception frequency is used as the control signal.

FIG. 3 and FIG. 4 are obtained by adding a step for automatic confirmation of the other party after steps 2 and 4 of the process of the first embodiment (FIG. 1). Indicated by.

In FIG. 3, if the receiver detects in step 2 that the PF level is present, the intermittent driving time of the receiver is extended, and in step 4-1 it is determined whether the content of the code signal is calling the wireless device. , And if so, in step 4-2, test whether the tone signals match. If the tone signals match, in step 5, the receiving frequency is set to f1N, the transmitting frequency is set to f2N, the reception waiting state is released, and a transition is made to the talking state.

If the RF detection signal is not included in step 2 or if the code signal or tone signal does not match in step 4-1 or step 4-2, the receiver of the wireless communication apparatus is set in step 3 The frequency f2N is driven as the reception frequency. Then, in step 4, if there is an incoming call during driving by f2N and the RF detection signal is included in the output of the receiver, in step 4'-1, it is tested whether or not the content of the code signal is calling the wireless device. And
If so, step 4'-2 tests whether the tone signals match. If the tone signals match, in step 5 ', the receiving frequency is set to f2N, the transmitting frequency is set to f1N, the reception waiting state is released, and the communication state is entered.

If no RF detection signal is included in step 4 or if the code signal or tone signal matches in step 4'-1 or 4'-2, the process returns to step 1. FIG. 4 shows a case of a full-duplex wireless communication device of a type that does not detect a code signal (a type that uses only a tone signal as a control signal), and the operation of the flowchart is similar to that of FIG.

When the operation of the present embodiment is viewed from the side of the communication device which starts transmission first, if it is assumed that the transmission is continuously performed at the transmission frequency containing the tone signal, the RF output and the AF output are output from the receiving device. 2D through the operation of the (full-duplex wireless communication device) side, and the frequency of the transmitting device side is, for example, f2N from the receiving device side to the transmitting device (full-duplex wireless communication device) side. The setting is notified. In this case, since the transmitting device also operates at full duplex (duplex), the notification can be recognized by the operator (user), so that a transition can be made to the call state.

In other words, the transmitting apparatus determines how the frequency relationship is to be determined and transmits, or the content is transmitted to the receiving apparatus, and the frequency relationship is determined based on the content. According to the embodiment, if the frequency f1N is transmitted from the transmitting device, f2N becomes the receiving frequency of the receiving device, and if the frequency f2N is transmitted from the transmitting device,
f2N is the receiving frequency on the receiving device side. That is, the frequency relationship is determined by the operation of the transmitting device.

<Embodiment 3> FIG. 5 is a block diagram showing a basic configuration of an embodiment of a full-duplex wireless communication apparatus to which a frequency setting method for a full-duplex wireless communication apparatus according to the present invention is applied.
50 is a full-duplex wireless communication device, 51 is an antenna, 52 is a duplexer circuit as transmitting / receiving branching means, 53 is a receiver, 54 is a controller as control means, 55 is a keyboard as channel selection means, 56 is a transmitter A is a reception frequency carrier, b is an AF (audio) output, c is an RF detection signal, d is a code output, e is a tone signal, and f is a reception frequency setting means for changing / setting the reception frequency (FIG. G) is an AF mode signal, h is a receiver drive signal, and i is a transmission PLL transmitted by transmission frequency setting means (not shown) for changing / setting the transmission frequency. Data, j
Is a transmitter drive signal, k is a duplexer switching signal, l is an AF modulation signal, and m is a transmission frequency carrier.
In this embodiment, the reception frequency setting means and the transmission frequency setting means are program means configured by a frequency setting process according to the frequency setting method of the full-duplex wireless communication apparatus according to the present invention, and constitute a controller ( It is stored in a ROM (not shown), and is executed by a CPU (not shown) constituting a controller when the device 50 operates.

In FIG. 5, the power supply (not shown) of the full-duplex wireless communication device 50 is turned on, and the user operates the keyboard 55 from among a plurality of channels composed of a combination of the frequencies f1N and f2N. Select one channel,
When performing simultaneous communication with another full-duplex wireless communication device, the device 50 uses the receiver PLL data f transmitted from the controller 54 to change the reception frequency.
Are alternately and intermittently driven with the frequencies f1N and f2N as the reception frequencies, and a reception wait state is set.

When a call is received from another duplex wireless communication device via the antenna 51 and the duplexer circuit 52, a reception frequency carrier a is input to the receiver 53, and the receiver 53 outputs the AF output b, An RF detection signal c, a code d, and a tone signal e are output. The AF output b is output from a sound output device (not shown) such as a speaker via a detection circuit, an amplifier (both not shown) and the like.

The RF detection signal c, code signal d and tone signal e are input to the controller 54. When receiving the RF detection signal c, the controller 54 extends the intermittent drive time of the receiver 53 by the receiver drive signal h, and tests whether the content of the code d is calling the wireless device 50. , If so, test if the tone signals match. If the tone signals match, the reception P for changing the reception frequency
The LL data f is set so that the current reception frequency of the receiver 53 is set as the reception frequency, and is sent to the receiver 53 to set the reception frequency. Further, the transmission / reception PLL data i for changing the reception frequency is set so that the other frequency is used as the transmission frequency, and is sent to the transmitter 56 to set the transmission frequency. At the same time, the transmitter drive signal j is transmitted to the transmitter 5
6 to release the reception waiting state and shift to the talking state. If the code signal d or the tone signal e does not match, the receiver 53 is alternately intermittently driven again with the frequencies f1N and f2N as the reception frequencies, and the reception wait state is continued.

Further, a radio communication device 5 for performing full-duplex communication
0 requires the duplexer circuit 52 as shown in FIG. 2, and the receiver 53 and the transmitter 56 share the antenna 51 by the duplexer circuit 52. In the present embodiment, the frequency must be switched between f1N and f2N during the reception waiting state to receive the signal.
Sends the duplexer switching signal k to the duplexer circuit 52 in synchronization with the reception frequency. Then, the duplexer circuit 52 outputs the duplexer switching signal k.
To switch the receiving band.

FIGS. 6, 7, and 8 show examples of the configuration of a duplexer circuit. The switching of the duplexer circuit may be performed by using a relay (RL) having two switching circuits 61 and 62 as shown in FIG. 6 to switch the relay in accordance with the reception frequency in the reception waiting state, or FIG. As shown in (2), two front-end units Rx1 and Rx2 are used in parallel to correspond to the reception frequencies in the reception waiting state.
x2, or when the difference between the frequencies of the receiver and the transmitter is small, the capacitance of the varicap C is changed by the switching signal S of the duplexer circuit as shown in FIG. The receiving frequency may be switched.

Although several embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made.

[0031]

As described above, according to the frequency setting method for a full-duplex wireless communication apparatus according to the present invention, the apparatus for communicating the transmission frequency and the reception frequency of the full-duplex wireless communication apparatus automatically. Since the setting is made, the user needs 2
There is no need to previously (manually) match and set the transmission frequency and the reception frequency between the two wireless communication devices, and it is possible to easily start a call of the full-duplex wireless communication device. Further, the full-duplex wireless communication device according to the present invention can automatically set the transmission frequency and the reception frequency on the device side by the frequency setting method of the present invention. Further, there is no need for an operation key or a display unit for previously (manually) matching and setting the transmission frequency and the reception frequency as in the conventional full-duplex wireless communication device. Also, the operation panel can be simplified.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a frequency setting process according to a frequency setting method of a full-duplex wireless communication device according to the present invention.

FIG. 2 is a timing chart of automatic frequency determination.

FIG. 3 is a second example of a flowchart showing a frequency setting process by the frequency setting method of the full-duplex wireless communication device according to the present invention.

FIG. 4 is a third example of a flowchart showing a frequency setting process by the frequency setting method of the full-duplex wireless communication device according to the present invention.

FIG. 5 is a block diagram showing a basic configuration of an embodiment of a full-duplex wireless communication device to which a frequency setting method for a full-duplex wireless communication device according to the present invention is applied.

FIG. 6 is a configuration example of a duplexer circuit.

FIG. 7 is another configuration example of the duplexer circuit.

FIG. 8 is another configuration example of the duplexer circuit.

FIG. 9 is an example of a full-duplex wireless communication system.

[Explanation of symbols]

 Reference Signs List 50 full-duplex wireless communication apparatus 51 antenna 52 duplexer circuit (transmission / reception splitting means) 53 receiver 54 controller (control means) 55 keyboard (channel setting means) 56 transmitter

Claims (4)

(57) [Claims] 1. A full-duplex communication system in which one channel is selected from a plurality of channels composed of a combination of first and second frequencies and simultaneous communication can be performed between two wireless communication devices. A frequency setting method for a full-duplex wireless communication device, comprising the steps of: (1) driving the receiver of the full-duplex wireless communication apparatus waiting for reception at the first frequency. (2) When the smoke line frequency detection signal is included in the output of the receiver, the frequency is set according to the following step (5), and when the radio frequency detection signal is not included, the step (3) below is performed. Steps to perform. (3) driving the receiver of the wireless communication device at the second frequency. (4) If the radio frequency detection signal is included in the output of the receiver, set the frequency according to the following (5 ′) step,
Steps (1) to (4) are repeated when the radio frequency detection signal is not included. (5) setting the first frequency as a reception frequency of the wireless communication device and setting the second frequency as a transmission frequency of the wireless communication device. (5 ′) setting the second frequency as a reception frequency of the wireless communication device and setting the first frequency as a transmission frequency of the wireless communication device. 2. The full-duplex wireless communication method according to claim 1, further comprising the following step (4-1) following the step (4). How to set the frequency of the device. (4-1) A step of comparing the value of the input control signal with the unique value of the wireless communication device waiting for reception, and executing the above steps (3) and (4) if they do not match. 3. The frequency of the full-duplex wireless communication device according to claim 2, wherein the control signal is a digital signal and / or an audible frequency signal. Setting method. 4. In a full-duplex communication system in which one channel is selected from a plurality of channels composed of a combination of first and second frequencies and simultaneous communication can be performed between two radio communication devices, A selection unit, an antenna, a transmission / reception branching unit for sharing the antenna for transmission / reception, and a signal including a radio frequency detection signal by inputting a frequency carrier of a set reception frequency via the antenna and the transmission / reception branching unit Receiving means for outputting a signal, a control means, and a transmitting means for outputting a frequency carrier having a set transmission frequency, and transmitting the signal via the transmitting / receiving demultiplexing means and an antenna, wherein the control means waits for a reception signal. During the time, a signal for assigning the first frequency and the second frequency alternately as a reception frequency to the receiver and an output of the receiver include a radio frequency detection signal. Receiving frequency setting means for transmitting to the receiver a signal for setting the frequency assigned to the receiver as the receiving frequency, and when the output of the receiver includes a radio frequency detection signal, Transmission frequency setting means for transmitting a signal having one frequency as a transmission frequency to a transmitter, the transmission / reception demultiplexing means switching a transmission / reception frequency band based on a switching signal from the control means. Characteristic full-duplex wireless communication device.