JP7455880B2 - wireless communication network system - Google Patents

Description

In a wireless communication network configured with wireless communication devices that are specified low-power wireless stations, the present invention is directed to an interception state of communication while two of the wireless communication devices are performing duplex communication using one pair channel. The present invention relates to a wireless communication network system in which another wireless communication device located in a remote area issues an interrupt request using another pair channel, and the wireless communication device and one of the other wireless communication devices transition to a network state in which duplex communication is performed.

Wireless communication devices compliant with specified low power standards perform short-distance voice communication using the 400MHz band (for duplex mode, 27 pairs of channels are provided on each pair of frequencies selected from the 421MHz and 440MHz bands). As it is a station that does not require a license, it can be used outdoors at various construction sites such as construction sites, and indoors at relatively large restaurants and retail stores, etc. It is used for the above communication.
In addition, since it is a low-power radio and has little possibility of affecting medical equipment, etc., it has recently been used for mutual communication between doctors, nurses, and receptionists at general hospitals and clinics.

Regarding the wireless communication device of this specific low power standard, the standard is formulated in detail in the following non-patent document 1, and the following are the matters related to the present invention.
(1) For duplex calls with an antenna power of 10 mW, use the channel numbers (1 to 19, 32 to 40) shown in Table 3.2 and Table 3.4 on pages 1-5 to 1-6. Uses paired channels (paired waves). However, the second wave with channel number 19 is considered to be a frequency control channel.
(2) The frequency switching method shall be fixed, manual, or automatic. (See pages 1-6)
(3) Transmission time limiting device (has the function of stopping the emission of radio waves within the following transmission time after emitting radio waves, and not transmitting any more until after the transmission pause time has elapsed) The transmission time and transmission pause time of the device (referring to the device) shall be as follows. However, devices that have a function that automatically limits communication time to within 3 minutes and does not allow further communication until 2 seconds have passed after the end of communication... (omitted)... have a transmission time limit. No equipment is required. (See pages 1-10)
A. When using a communication channel, the transmission time shall be within 30 seconds.
b) When using the frequency control channel, the transmission time shall be within 0.5 seconds.
C) The transmission pause time shall be at least 2 seconds.
(4) Radio equipment shall be equipped with carrier sense. Prior to setting up a wireless communication line, Carrier Sense detects radio waves of the same frequency as the radio waves emitted by the radio station (for duplex and semi-duplex systems) if it receives radio waves that exceed the regulations of another radio station. shall not emit radio waves of the transmission frequency corresponding to the reception frequency). (See pages 1-10)
(5) Modulation methods, modulation speeds, and signal configurations for control signals, selective call signals, channel designation signals, response signals, etc. for line connections are not stipulated. (See pages 1-10)

When configuring a network for mutual communication as described above with three or more wireless communication devices, two wireless communication devices use one of the paired channels with channel numbers 1 to 18 or 32 to 40. In this network system, a simultaneous call is made using a duplex method, and another wireless communication device intercepts the call by turning on two receiving and demodulating means tuned to each frequency of the paired channel related to the simultaneous call.
In that case, considering the usage of this type of wireless communication device as described above, there is a situation where the user of the wireless communication device on the eavesdropping side wants to make simultaneous calls in place of the user of the wireless communication device on the duplex call side. It is inevitable that it will occur.

Therefore, there is a need for a network system in which the wireless communication device on the eavesdropping side can interrupt the wireless communication device on the duplex call side at any time, and the parties to a simultaneous call can be switched on an on-demand basis.
However, due to the standard restrictions related to points (3) and (4) of note in Non-Patent Document 1 below, it is virtually impossible to interrupt using the paired channels used for duplex calls.
In other words, the wireless communication devices on the duplex call side use the maximum communication time limit of 3 minutes, and if necessary, establish a line connection again after a 2-second pause period to continue the call. During the communication time period, even if the wireless communication device on the eavesdropping side performs carrier sense, it will be in a busy state, so it is almost impossible for the wireless communication device on the eavesdropping side to interrupt.
Perhaps for this reason, there is no concept of "interruption" in networks made up of wireless transmitters of specified low-power radio stations, and the wireless transmitter on the intercepting side can wait until the end of the call between the wireless transmitters on the duplex call side. It is customary to place a call using the wireless communication device to be contacted as the called station at the timing when the duplex line is to be disconnected.

By the way, Patent Document 1 listed below discloses a wireless communication system that allows simultaneous calls between three or more parties as shown in FIGS. 17(a) and 17(b).
The wireless communication system shown in FIG. 17(a) includes a base unit 110 that operates as a repeater and three slave units 120-1 to 120-3.
Here, base unit 110 performs carrier sense (CS) with receiving means (RX21-4), and includes modulating transmitting means (TX23) that transmits a radio signal on a predetermined paired channel (CH0), and ) and each reception demodulation means (RX21-1 to 3) that receives radio signals of three different channels (440MHz band - CH1, CH2, CH3), and those reception demodulation means (RX21-1 to 3). It consists of a signal synthesizing means 111 which synthesizes each obtained audio signal and outputs it to a modulation transmitting means (TX23).
On the other hand, each handset 120-1 to 120-3 has reception demodulation means for carrier sense (CS) (RX11-1: CH1, CH2, CH3) and reception demodulation means for communication (RX11-2: CH0), respectively. is equipped with modulation and transmission means (TX13: 440MHz band - CH1/CH2/CH3) corresponding to the channels (440MHz band - CH1, CH2, CH3) of each receiving and demodulating means (RX21-1 to RX21-3) of the base unit 110. There is.
Therefore, if the carrier sense (CS) of the base unit 110 indicates that there is no reception input on the frequency concerned, each slave unit 120-1 to 3 determines that there is no reception input on the frequency according to their respective carrier sense (CS). Simultaneous calls using the duplex method can be made between handsets under the following conditions.
Note that although there are three handsets in Figure 17(a), if the base unit 110 side adds reception and demodulation means for the 440MH band channel, it will be possible to use a duplex system in which four or more handsets participate. Simultaneous calls are also possible.

The wireless communication system shown in FIG. 17(b) attempts to realize simultaneous three-party phone calls between slave devices without requiring a base device as a relay device as in FIG. 17(a).
The first handset 130 includes a modulation transmitting means (TX13) and a receiving demodulating means (RX11-1: which also executes carrier sense) that transmit and receive radio signals on a predetermined pair channel (421MHz band-CH1, 440MHz band-CH1). , a reception demodulation means (RX11-2) relating to a channel (440MHz band-CH2) different from the paired channel (CH1), and two signal synthesis means 131, 132, each of the reception and demodulation means (RX11-1), ( The signal synthesis means 131 synthesizes each audio signal obtained by receiving and demodulating the RX11-2) and outputs it to the speaker 133, and also combines the audio signal synthesized by the signal synthesis means 131 with the audio signal input from the microphone 134. are combined by the signal combining means 132 and output to the modulation transmitting means (TX13).
The second handset 140 is connected to the first handset 130 by means of reception and demodulation means (RX11-1: 421MHz band-CH1) which also serves as carrier sense (CS) and modulation transmission means (TX13: 440MHz band-CH1). Make simultaneous calls.
The third handset 141 has reception and demodulation means for carrier sense (CS) (RX11-1: 421MHz band-CH2), reception and demodulation means for communication (RX11-2: 421MHz band-CH1), and modulation and transmission means ( TX13: 440MHz band-CH2) to make a simultaneous call with the first handset 130.
According to the wireless communication system shown in FIG. 17(b), the second and third handsets can also share audio information by synthesizing the audio signals in the first handset 130. Calls can be made.
In addition, if the first handset 130 side is provided with a reception demodulation means (RX11-n: 440MHz band-CHn) for another channel in addition to the reception demodulation means (RX11-2: 440MHz band-CH2), Simultaneous calls between four or more handsets are also possible.

On the other hand, in contrast to the wireless communication system shown in FIG. 17, the applicant of the present application has proposed an audio wireless communication system disclosed in Patent Document 2 below.
According to this invention, as shown in FIG. 18, when the wireless communication device 201 and the wireless communication device 202 are talking simultaneously via the pair channel for duplication, the wireless communication devices 203-1 to 203-n While listening to a simultaneous call, it is possible to participate in the call using PTT via a simplex channel, provided that there is no receiving input on that channel using carrier sense (CS).
Only one wireless communication device 203-1 to 203-n can participate in a call at the same time, but if wireless communication device 203-2 participates, even non-participating wireless communication devices 203-1, 3 to n can participate. Calls between the wireless communication devices 201, 202, and 203-2 can be intercepted.
Wireless communication devices 203-1 to 203-n participate in simultaneous calls using the Carrier Sense/PTT method, but it is easier to send concise and to-the-point messages when using simplex communication than when using duplex communication. There is also a tendency to be able to disseminate information, and in fact, it is often possible to improve the quality and efficiency of information exchange.

Patent No. 6072337 Patent No. 6861861

Radio Industries Association, “Specified Low Power Radio Stations/Radio Telephone Radio Equipment/Standards”, RCR STD-20 5.1 edition, revised October 29, 2021

The wireless communication system (FIG. 17) according to Patent Document 1 mentioned above realizes simultaneous calls by three or more parties, but simultaneous calls by many people tend to result in confusing conversations, and the exchange of business information is difficult. It cannot be said that the system is necessarily adaptive.
In addition, since the output audio from each wireless communication device is a composite of the input audio for all wireless communication devices, more environmental noise is mixed in, which tends to result in poor quality playback sound. .
Furthermore, as the number of callers increases, the number of communication channels used increases by the number of callers in the system, so there is a problem in that more radio wave resources are used.

On the other hand, the wireless communication system according to Patent Document 2 (FIG. 18) uses a simplex system to participate in simultaneous duplex calls between two parties, so problems like the wireless communication system of Patent Document 2 do not occur. However, if any of the users of wireless communication devices 203-1 to 203-n urgently need to exchange information with the users of wireless communication devices 201 and 202, there may be discomfort and frustration due to participation using the simplex method. It is inevitable that frustration will occur.

Therefore, in a wireless communication network consisting of three or more wireless communication devices that are specified low-power wireless stations, the present invention provides a wireless communication device that is conducting duplex communication when another wireless communication device is intercepting the call. To provide a wireless communication network system in which a device can interrupt at any time and shift to a network where duplex communication can be performed with a wireless communication device of a desired party.

A first invention is a wireless communication network composed of three or more wireless communication devices that are specified low-power wireless stations, wherein two wireless communication devices (hereinafter referred to as “first and second a wireless communication device") executes duplex communication using a first pair channel, and receives the duplex communication of its own device on a second pair channel different from the first pair channel in each case. The reception demodulation means for a frequency in the same frequency band as the side frequency band (hereinafter referred to as "interrupt frequency") is kept active, and the output signal of the reception demodulation means for the interrupt frequency is converted into an audio signal from the audio input means. While in a duplex communication state in which the signal is combined with the output signal of the receiving and demodulating means relating to the duplex communication and output to the audio output means, the network A wireless communication device other than the first and second wireless communication devices in the device keeps active two reception demodulation means that use each frequency of the first pair channel as a reception frequency, and performs reception demodulation of the two reception demodulation means. In a state of the network in a communication interception state (hereinafter referred to as "first network state") in which each output signal of the means is synthesized and output to the audio output means, the wireless communication device in the communication interception state responds to the interruption. The present invention relates to a wireless communication network system characterized in that an interrupt request is made using a frequency used for transitioning to a network state in which the own device becomes a one-side terminal of duplex communication.

In the wireless communication network of the present invention, the channel numbers (1 to 18, 32 to 40) shown in Table 3.2 and Table 3.4 on pages 1-5 to 1-6 of the above non-patent document 1 are used. Use paired channels for duplex communication.
The first and second wireless communication devices each use one of a total of 27 pair channels as the first pair channel, and transmit modulated frequencies of the two bands (421 MHz band and 440 MHz band). Duplex communication is performed by using the receiving and demodulating means in an inverse relationship to each other.
Further, the reception demodulation means uses a frequency related to a second pair channel having a different channel number from the first pair channel, and is in the same band as the frequency of the reception demodulation means used for duplex communication by the own device. It is kept active and is ready to receive interrupt requests using that frequency as the interrupt frequency.
In the first and second wireless communication devices, the output of the reception and demodulation means for receiving the interrupt request is combined with the output signal of the audio input means of the own device and input to the modulation and transmission means for duplex communication. and is combined with the output signal of the receiving and demodulating means related to duplex communication and output to the audio output means.On the other hand, the wireless communication devices other than the first and second wireless communication devices are connected to the first paired channel. The two receiving and demodulating means for each frequency are activated, and their output signals are synthesized and output to the audio output means, and the duplex communication of the first and second wireless communication devices can be intercepted. It has become.
Therefore, according to this wireless communication network, an interrupt request is always made on-demand to change the network configuration from a wireless communication device that is intercepting communication to the first and second wireless communication devices using the second paired channel. It can be performed.
Also, whether the interrupt request has been made can be confirmed in real time on all wireless communication devices within the network.

In the second invention, in the first network state, any wireless communication device (hereinafter referred to as a "third wireless communication device") in a communication intercepting state is activated by operating a PTT (Push to Talk) button. Alternatively, the VOX (Voice Operated Relay) function activates the modulation transmission means related to the interrupt frequency to enable communication between the own aircraft and a specific wireless communication device other than the own aircraft (hereinafter referred to as the "fourth wireless communication device"). In addition to an audio signal requesting communication between the wireless communication device and the fourth wireless communication device, the wireless communication device includes identification information of the own device and the fourth wireless communication device, and paired channel information indicating which of the first or second paired channel is to be used. When transmitting an interrupt request signal, the first or second wireless communication device receives the interrupt request signal, so that the third and fourth wireless communication devices transmit the first and second wireless communication devices. A second network state in which a duplex communication state using the pair channel indicated by the pair channel information is established in a manner that the communication device is replaced, and wireless communication devices other than the third and fourth wireless communication devices are in a communication eavesdropping state. transmitting a response signal consisting of a network control command for configuring and a communication end signal for terminating duplex communication of the first and second wireless communication devices from the modulation transmission means for duplex communication; Each wireless communication device in the wireless communication network that has transmitted and received the response signal executes the response control program stored in advance in the wireless communication device itself based on the communication end signal and the network control command, so that the first The present invention relates to a wireless communication network system in which the network state of the network state is shifted to the second network state.

The present invention is dependent on the first invention, and is a combination of wireless communication devices that performs duplex communication in a first network by transmitting an interrupt request signal from a wireless communication device in a communication intercept state. The present invention relates to a network system for migrating to a changed second network.
In the configuration of the first network, the third wireless communication device that is in a communication eavesdropping state activates a modulation transmission means of a frequency corresponding to the interrupt frequency of either the first or second wireless communication device and requests an interrupt. When a signal is sent, all wireless communication devices in the network can receive the signal and confirm that an interrupt request has been made.
Here, the interrupt request signal of the third wireless communication device is transmitted in conjunction with the operation of the PTT button or by the VOX function, and is an audio signal (multiple communication between the own device and the fourth wireless communication device). communication request), identification information of the two wireless communication devices, and pair channel information (pair channel to be used in the next duplex communication).
However, the fourth wireless communication device is a specific wireless communication device other than the own device, and includes not only the first and second wireless communication devices, but also a wireless communication device other than the third wireless communication device that is in a communication interception state. Also included.
Note that the VOX function is a function that detects an input signal from a microphone and automatically starts/ends transmission depending on the signal level.

In this second invention, upon receiving the interrupt request signal, the first or second wireless communication device automatically returns a response signal consisting of a network control command and a communication end signal.
In this case, the network control command is a command signal to configure the second network based on the interrupt request signal, and the communication end signal is a signal to end the current duplex communication, and the interrupt request signal is directly received. It is transmitted at a transmission frequency of a pair channel related to duplex communication of the first or second wireless communication device.
Therefore, in the present invention, the interrupt request of the third wireless communication device is forced, and the intention of the user of the third wireless communication device is directly reflected.

When the network control command and the communication end signal are transmitted, the communication end signal causes the first and second wireless communication devices to terminate duplex communication, and each wireless communication device in the wireless communication network operates based on the network control command. By controlling their own devices, the first network can be transferred to the second network.
In that case, the network control command includes combination information of two wireless communication devices that perform duplex communication in the second network and whether the pair channel used for the duplex communication is either the first or second pair channel. This is code data associated with such selection information, and when there are n wireless communication devices (n≧3) in the network, only a multiple of the number of combinations of two of them (= _n C ₂ ) is On the other hand, each wireless communication device stores its own control program corresponding to each network control command, and each wireless communication device executes the control program according to the contents of the interrupt request. It will automatically move to the second network.

A third invention is dependent on the second invention, and in the first or second wireless communication device that has received the interrupt request signal, when the interrupt request is permitted, the interrupt request signal is The response signal is transmitted within a predetermined time from the time of reception of the response signal along with an input audio signal to the effect that the interrupt request accompanied by the operation of the PTT button or the VOX function is permitted, and when the interrupt request is not permitted. , the wireless communication network system decided to ignore the request.

In this way, by granting the first or second wireless communication device, which is the destination of an interrupt request, the authority to permit or disallow the request, the communication between the first wireless communication device and the second wireless communication device can be improved. When it is necessary to continue a call using duplex communication, it is possible to prevent the unreasonable situation where the call is disconnected without permission, and also to provide an audio signal that allows the interrupt request. Since a response signal is transmitted, more rational and smooth operation of the wireless communication network becomes possible.

A fourth invention is dependent on the third invention, and in the first network state configured of four or more wireless communication devices that are specified low power wireless stations, the first or second After the wireless communication device receives the interrupt request signal from the third wireless communication device and before transmitting the response signal, the wireless communication device further receives the interrupt request signal from another wireless communication device (hereinafter referred to as “the fifth wireless communication device”) in the wireless communication network. In the case where the first or second wireless communication device receives another interrupt request signal from a wireless communication device (hereinafter referred to as “a wireless communication device”), the first or second wireless communication device receives the two interrupt request signals, thereby causing the PTT button to be operated. or the third and fifth wireless communication devices communicate with the first and second wireless communication devices together with an input audio signal requesting communication between the third and fifth wireless communication devices that activates the VOX function. to configure a third network state in which a duplex communication state is established in the pair channel indicated by the paired channel information in a manner that is switched with the above, and wireless communication devices other than the third and fifth wireless communication devices are in a communication eavesdropping state. transmitting a response signal consisting of a network control command of Each wireless communication device in the wireless communication network that has transmitted and received the communication changes the first network state by executing a corresponding control program stored in the device in advance based on the communication end signal and the network control command. 4. The wireless communication network system according to claim 3, wherein the wireless communication network system transitions to the third network state.

In the first network state, if the first or second wireless communication device is authorized to grant or disallow an interrupt request as in the third invention, the third wireless communication device requests an interrupt. After that, an interrupt request may be made from another wireless communication device (fifth wireless communication device) before the response signal is transmitted.
In this case, if the first or second wireless communication device does not ignore both interrupt requests, it is possible to allow the preceding interrupt request, but the subsequent interrupt request is often more urgent. In addition, the fact that the interrupt requests were made one after the other suggests that the calls are related to the same matter, so it is more likely that the third and third parties involved in the two interrupt requests. It is often more rational to have the respective users of the fifth wireless communication device discuss and make adjustments.

Therefore, the first or second wireless communication device that has received the two interrupt request signals from the third and fifth wireless communication devices sends a request for a call between the third and fifth wireless communication devices. A network control command for configuring a third network in which the wireless communication devices enter a duplex communication state together with the input audio signal and the other wireless communication devices enter a state of intercepting the duplex communication; A response signal consisting of a communication termination signal for terminating the duplex communication of the second wireless communication device is transmitted.
As a result, similarly to the first and second inventions, the duplex communication between the first and second wireless communication devices is terminated by the communication end signal, and each wireless communication device in the wireless communication network receives the network control command. The network automatically shifts to the third network by executing a corresponding control program based on this.

In the fourth aspect of the invention, each of the interrupt requests from the third wireless communication device and the fifth wireless communication device is set by the first or second wireless communication device, respectively. When the interrupt request is made individually for each interrupt frequency of a pair of channels, the interrupt request from the third wireless communication device made earlier among the first or second wireless communication device is It is desirable that the wireless communication device that directly receives the input audio signal and the response signal transmits the input audio signal and the response signal.

In the first network state, an interrupt request can be received on one channel of the second paired channel that is set to be active in both the first or second wireless communication device, so Therefore, two interrupt requests from the third and fifth wireless communication devices may be made individually to the first and second wireless communication devices.
In that case, the first or second wireless communication device which directly received the interrupt request made earlier from the third wireless communication device transmits the input audio signal and the response signal.
Here, "directly received" refers to the wireless communication device that received the interrupt request signal of the third wireless communication device via the interrupt frequency, out of the first or second wireless communication device, This means that the wireless communication device is not the one receiving the data via duplex communication.

A fifth invention is dependent on the first invention, and in the first network state configured of four or more wireless communication devices that are specified low power wireless stations, a plurality of wireless communication devices are in a communication intercepting state. Each of the wireless communication devices activates the modulation transmission means related to the interrupt frequency by operating the PTT button or by using the VOX function, and transmits an interrupt request signal consisting of an arbitrary audio signal and identification information of the own device. However, if the first or second wireless communication device receives another interrupt request signal within a predetermined time after receiving the first interrupt request signal, the first or second wireless communication device is in a duplex communication state using the first or second pair channel in such a manner that the wireless communication devices that transmitted those interrupt request signals are replaced with the first and second wireless communication devices, and other A response signal consisting of a network control command for configuring a new network state in which the wireless communication device enters a communication interception state, and a communication termination signal for terminating duplex communication of the first and second wireless communication devices. is transmitted from a modulation transmitting means relating to duplex communication, and each wireless communication device in the wireless communication network that has transmitted and received the response signal transmits the response signal based on the communication end signal and the network control command. The wireless communication network system is configured to transition from the first network state to the new network state by executing a corresponding control program.

In the second to fourth inventions described above, a specific partner wireless communication device is specified in an interrupt request from a wireless communication device that is in a communication eavesdropping state, and the wireless communication device and the wireless communication device enter into a duplex communication state. Although this is for configuring a network, interrupt requests are not necessarily made when requesting connection to a specific party, but for example, when asking questions to all users of other wireless communication devices within the network. At that point, it is not uncommon to wait for a response from an arbitrary party, such as when posing a question to the other party.
This fifth invention deals with such cases, and if the interrogator's interrupt request and the answerer's interrupt request are made within a predetermined time, the wireless communication devices of both parties will automatically perform duplex communication with each other. Move the network configuration to a communication state.
Therefore, this basically corresponds to the case where the third wireless communication device and the fifth wireless communication device each send out an interrupt signal that does not specify the other party in the fourth invention, and the interrupt request signal can be any audio signal. It is only necessary to configure the device's own identification information, and the pair channel used for duplex communication in the new network state should be set in advance to the first or second pair channel, or it can be used alternately. It is sufficient to make it regular.
Therefore, according to the fifth invention, in the first network state, duplex communication is performed every time two interrupt request signals are issued within a predetermined time from the wireless communication device in the communication intercept state. The combination of wireless communication devices will be automatically changed and the system will move to a new network state.

In addition, in this fifth invention, as in the case of the fourth invention, it is possible to accept requests on two interrupt frequencies, so that the first and second wireless communication devices can each If the reception demodulator of the set interrupt frequency directly receives each of the interrupt signals separately within the predetermined time, the first interrupt request signal of the first or second wireless communication device is received. It is desirable that the wireless communication device that directly receives the response signal transmits the response signal.

In the first to fifth inventions described above, each wireless communication device in the wireless communication network is connected to two wireless communication devices that are performing duplex communication, and is used in the duplex communication. It is desirable that the display unit of the wireless communication device display information related to the paired channels currently in use and the interrupt frequencies that the two wireless communication devices are receiving.

In communication between wireless communication devices that are specified low-power wireless stations, voice signals are transmitted and received by including the individual ID and channel information of the device in the header of the communication frame format. In this case, duplex communication can be received by all wireless communication devices in the network, and since the interrupt frequency is a frequency that has a fixed relationship with the duplex communication channel, two devices performing duplex communication It is possible to extract from the header and display each interrupt frequency that the two wireless communication devices are open, along with information regarding the wireless communication devices and the pair channels used by the two wireless communication devices.
This allows all wireless communication devices in the network to visually share this information at all times, which is particularly convenient when making an interrupt request.

The wireless communication network system of the present invention uses two paired channels in a wireless communication network composed of three or more wireless communication devices that are specified low power wireless stations, and two wireless communication devices are connected to one pair channel. While the other pair channel is used for interrupt requests from other wireless communication devices, other wireless communication devices in the network receive radio waves from the one paired channel. By adopting a network configuration that intercepts the duplex communication, the wireless communication device on the communication interception side interrupts the wireless communication device on the duplex communication side, and the network configuration can be sequentially and smoothly changed on demand. This enables rapid and flexible operation of wireless communication networks.
In addition, the present invention can avoid the tendency for conversation quality to deteriorate and conversations to become confusing due to the mixing of environmental noise that occurs when many people are talking simultaneously, and to participate in calls within the network on an on-demand basis. A wireless communication network environment that is constantly managed and easy to use can be realized.

FIG. 1 is a block diagram of a wireless communication device applied to a wireless communication network system according to an embodiment. FIG. 2 is a communication frame format diagram used in the wireless communication network system of the embodiment. Regarding Embodiment 1, (a) is a schematic configuration diagram of a wireless communication network in an initial state, and (b) is a diagram showing display contents on a display unit. Regarding Embodiment 1, (a) is a schematic configuration diagram of a wireless communication network showing a state in which an interrupt request has been made, and (b) is a diagram showing contents displayed on a display unit. 3 is a communication sequence flow diagram in the wireless communication network system in Embodiment 1. FIG. Regarding Embodiment 1, (a) is a schematic configuration diagram of a wireless communication network after transition due to an interrupt request, and (b) is a diagram showing display contents on a display unit. 3 is a communication sequence flow diagram in the wireless communication network system in Embodiment 1. FIG. Regarding Embodiment 1, (a) is a schematic configuration diagram of a wireless communication network after transition due to an interrupt request, and (b) is a diagram showing display contents on a display unit. Regarding Embodiment 1, (a) is a schematic configuration diagram of a wireless communication network showing a state in which an interrupt request has been made, and (b) is a diagram showing contents displayed on a display unit. 3 is a communication sequence flow diagram in the wireless communication network system in Embodiment 1. FIG. Regarding Embodiment 1, (a) is a schematic configuration diagram of a wireless communication network after transition due to an interrupt request, and (b) is a diagram showing display contents on a display unit. Regarding Embodiment 2, (a) is a schematic configuration diagram of a wireless communication network showing a state in which an interrupt request has been made, and (b) is a diagram showing contents displayed on a display unit. FIG. 3 is a communication sequence flow diagram in the wireless communication network system in Embodiment 2. FIG. Regarding Embodiment 2, (a) is a schematic configuration diagram of a wireless communication network after transition due to an interrupt request, and (b) is a diagram showing display contents on a display unit. Regarding Embodiment 2, (a) is a schematic configuration diagram of a wireless communication network showing a state in which an interrupt request has been made, and (b) is a diagram showing contents displayed on a display unit. FIG. 7 is a communication sequence flow diagram in the wireless communication network system in Embodiment 3. FIG. 1 is a diagram illustrating a wireless communication system according to the prior art; FIG. 1 is a diagram illustrating a wireless communication system according to the prior art; FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a wireless communication network system of the present invention will be described in detail with reference to the drawings.
First, the wireless communication devices that are specified low-power wireless stations used in each of the embodiments described below have in common the basic configuration shown in the block diagram of FIG. In the description of the operations and states of each of the radio communication devices A to E shown in the configuration diagram and signal sequence flow diagram, each component shown in FIG. 1 and its reference numerals will be used in common as appropriate.

Regarding the reception system, a radio wave signal received by an antenna 51 is input to two reception demodulation units 52 and 53, and each reception demodulation unit 52 and 53 set to a different reception channel selects a radio signal and receives it. By demodulating, the output of the audio signal of each receiving channel is obtained.
When the machine is in duplex communication, the reception demodulator 52 is set to the receiving side channel in duplex communication, and the reception demodulator 53 is set to the interrupt channel, and when it is in the call eavesdropping state, Each channel of the reception demodulators 52 and 53 is set to a pair of channels used in duplex communication.
In either state, the audio signals demodulated by the two receiving demodulators 52 and 53 are combined in the input/output controller 54, and the combined audio signal is amplified by the amplifier 55 and output to the speaker (or earphone 56). The audio is played from.

On the other hand, regarding the transmission system, the audio signal from the microphone 57 is amplified by the amplifier 58 and input to the input/output control section 54. The amplifier 58 amplifies the output signal of the reception demodulator 53 set as the interrupt channel and the input signal from the microphone 57, and outputs the synthesized audio signal to the modulation transmitter 59. In this case, the input/output control section 54 directly outputs the audio signal from the microphone 57 amplified by the amplifier 58 to the modulation transmission section 59 set as the interrupt channel.
The modulation transmitter 59 modulates the carrier signal with an audio signal, amplifies the power of the modulated carrier signal, and transmits it from the antenna 60. It is also possible to set the VOX mode in advance and use the VOX function.

A system control unit 63 controls the operation of the entire system of the wireless communication device.
That is, the system control section 63 controls the reception demodulation sections 52, 53 and 53 based on the instruction signal from the operation section 61, various control signals obtained from the demodulated signals at the reception demodulation sections 52 and 53, and the count signal of the timer 62. In addition to setting the channel in the modulation transmitting section 59 and switching the signal synthesis means in the input/output control section 54, it also generates an interrupt request signal and a corresponding network control signal.
Further, the system control unit 63 extracts identification information related to the wireless communication device in duplex communication, pair channel usage information, and interrupt channel information from the demodulated signals in the reception demodulation units 52 and 53, and displays the extracted information on the liquid crystal display. 64, and if the VOX mode is set, that control is also executed.

The communication frame format used in the wireless communication network system of this embodiment is shown in FIG. 2, and is transmitted and received using a speech channel using voice band signals such as MSK (filtered minimum shift keying). be done.
In this embodiment, an interrupt request signal and a response signal, which will be described later, are transmitted by being incorporated into the header of the communication frame format in the modulation transmitter 59 of the wireless communication device on the transmitting side, and are transmitted by the receiving demodulator 52 of the wireless communication device on the receiving side. ,53 is extracted.

<Embodiment 1>
The initial state of the wireless communication network in this embodiment is shown in Figure 3 (a), and two of the five wireless communication devices A to E, A and B, are in a duplex communication state, and the other three, C to E, are in a state of intercepting the duplex communication. As described above, each wireless communication device A to E has the configuration shown in Figure 1, and can enter a duplex communication state or a communication intercept state by controlling the channel setting for the receiver/demodulator units 52, 53 and the modulator/transmitter unit 59, and by controlling the switching of the signal synthesis means, etc. in the input/output control unit 54.

In the wireless communication devices A and B in the duplex communication state, the channel numbers (1 to 18, 32 to 40), one pair of channels (channel number: CHm) is set in reverse channel settings for transmission and reception in wireless communication devices A and B, and another pair of channels (channel number: CHm) is set in the reception demodulator 53. A channel (channel number: CHx) that has the same frequency band as the channel set on the receiving demodulator 52 side is set.
Furthermore, in each of the wireless communication devices A and B, the demodulated signals from both receiving and demodulating sections 52 and 53 are combined by the input/output control section 54 and output to the amplifier 55, and the synthesized signal is outputted as an audio signal from the speaker 56. On the other hand, the demodulated signal of the reception demodulator 53 and the input signal from the microphone 57 are combined by the input/output controller 54 and input to the modulation transmitter 59, and the carrier signal is modulated with the combined signal and power amplified. A signal is emitted from the antenna 60 on the transmitting side channel of the paired channel (channel number: CHm).

On the other hand, in the wireless communication devices C to E that are in the call intercept state, the two reception demodulation units 52, 53 are set to the two channels of the pair channel (channel number: CHm), and each reception demodulation unit 52, 53 is set to the two channels of the pair channel (channel number: CHm). receives and demodulates each transmission signal from the wireless communication devices A and B, and outputs it to the input/output control unit 54. The input/output control unit 54 combines these demodulated signals, and the combined signal is amplified by an amplifier 55. and the audio is output from the speaker 56.

The connections (thick solid lines for duplex connections and thin broken lines for interception connections) showing the respective wireless communication devices A to E and their mutual transmission/reception relationships in FIG. This figure shows a schematic configuration of a wireless communication network.
Regarding each wireless communication device A to E, there are two channels (each channel in the 421MHz band and 440MHz band) for each of the two paired channels (channel numbers: CHm and CHx) used in this embodiment, and In communication, the modulation transmitter 59 and the receiver demodulator 52 use one paired channel, and the receiver demodulator 53 uses the other paired channel for interrupt requests. The channel control states that can be adopted by the section 59 (TX) and the reception demodulators 52, 53 (RX) are divided into eight blocks [(TX-421MH band-CHm, TX-440MH band-CHm, TX-421MH band-CHx, TX- 440MH band-CHx) and (RX-421MH band-CHm, RX-440MH band-CHm, RX-421MH band-CHx, RX-440MH band-CHx)] in a manner divided by paired channels (CHm and CHx). Virtually represented, things in an active state are shown in white, and things in an inactive state are shown in gray.
Regarding the function of the input/output control section 54, it is configured between the modulation transmitting section 59 (TX)/reception demodulation 52, 53 (RX) block and the microphone 57-amplifier 58/speaker 56-amplifier 55. It is represented by a circuit section including a signal synthesis section.
These matters are shown in the following Figures 4(a), 6(a), 8(a), 9(a), 11(a), 12(a), 14(a) and The same applies to FIG. 15(a).

Returning to the network in Figure 3, wireless communication devices A and B are mutually performing duplex communication using paired channels (CHm), and in this case, wireless communication device A is communicating with the TX-440MHz band-CHm. RX-421MHz band-CHm is activated, wireless communication device B activates TX-421MHz band-CHm and RX-440MHz band-CHm, and each user is making a call using duplex communication.
At the same time, wireless communication device A sets active the RX-421MHz band-CHx, which is a paired channel (CHx) and is related to the channel on the same frequency band side as the RX-421MHz band-CHm on the duplex communication side, and performs wireless communication. Machine B also has another paired channel (CHx), which is RX-440MHz band-CHm on the duplex communication side and RX-440MHz band-CHx related to the same frequency band side channel, and sets each as active, and uses each for interrupts. It is open as a channel.
Here, in wireless communication devices A and B, 421MHz band-CHx, which is a paired channel (CHx) and is a channel on the same frequency band side as RX-421MHz band-CHm and RX-440MHz band-CHm on the duplex communication side. ,440MHz band-CHx is opened as an interrupt channel because if the channels of TX-440MHz band-CHm and TX-421MHz band-CHm on the duplex communication side and the above-mentioned interrupt frequency become the same frequency band, the signal This is because wraparound is more likely to occur, resulting in cracks and distortion in the output audio, leading to deterioration in audio quality.

On the other hand, wireless communication devices C to E correspond to TX-440MHz band-CHm, TX-421MHz band-CHm related to duplex communication of wireless communication devices A and B, RX-440Mz band-CHm, RX-421Mz band-CHm is set to active.
That is, the two channels of the paired channel (CHm) are set in the receiving demodulators 52 and 53, and the duplex communication of the wireless communication devices A and B is intercepted.

By the way, wireless communication devices A and B perform voice communication using duplex communication, and transmit voice signals with their own station ID and channel information included in the header of the communication frame format shown in FIG. In the network 3(a), this information can be received by all wireless communication devices A to E.
Therefore, wireless communication devices A and B are based on each information in the header of the communication frame received on RX-421Mz band-CHm and RX-440Mz band-CHm, and wireless communication devices C to E are based on their own RX-CHm and RX-440Mz band-CHm. Based on the information in the header of the communication frame received in the 440Mz band-CHm and the RX-421Mz band-CHm, it is determined whether the wireless communication devices in the duplex communication state are A or B, as shown in FIG. 3(b). , causes the liquid crystal display section 64 of the own device to display that the paired channel number being used is CHm, and that the interrupt frequency opened by wireless communication devices A and B is the paired channel with channel number CHm.

Here, in the network state of FIG. 3, if the user of wireless communication device C who is intercepting the duplex communication of wireless communication devices A and B wishes to communicate with the user of wireless communication device A, the wireless communication The user of device C activates TX-421MHz band-CHx or TX-440MHz band-CHx related to the paired channel (CHx), and wireless communication devices A and B, which are in duplex communication state, activate it for interrupt. Send an interrupt request signal to RX-421MHz band-CHx or RX-440MHz band-CHx.
FIG. 4(a) shows a state in which the interrupt request is made.
However, this example shows a case where wireless communication device C transmits an interrupt request from TX-421MHz band-CHx to wireless communication device A's RX-421MHz band-CHx. This is an example in which the desired destination and the interrupt request destination match in wireless communication device A.
Note that after this interrupt request, the status of each wireless communication device A to E, the transmission and reception of signals within the network, etc. will be explained with reference to the signal sequence flow of FIG. 5.

As a specific sequence, the user of wireless communication device C first specifies wireless communication device A as the desired call destination (in this case, it is also the interrupt request destination), and then selects the wireless communication device A as the interrupt request destination. When 421MHz band-CHx, which is the interrupt channel of communication device A, is set and the PTT button is turned on, the system control unit 63 of wireless communication device C makes RX-421MHz band-CHm inactive and replaces it with it. If RX-440MHz band-CHx is temporarily activated and carrier sense (CS) is executed, and the carrier sense (CS) does not detect radio waves from other radio stations on the 440MHz band-CHx channel, TX- The 421 MHz band-CHx is activated, and the interrupt request signal is embedded in the data payload and PHY header of the communication frame and transmitted together with a voice signal from the microphone 57 indicating that the user is making an interrupt request.
In addition, in wireless communication device C, before activating TX-421MHz band-CHx, the same frequency band RX-421MHz band-CHm is inactivated, so the output audio may be affected by signal wraparound. No deterioration occurs.

This "voice indicating that an interrupt request is to be made" may be a simple phrase such as "This is C. Please let me speak to Mr. A."
In addition, the interrupt request signal includes the identification code (C-ID) of the own device, the identification code of the wireless communication device to which the call is desired (in this case, the identification code of wireless communication device A: A-ID), and the next duplex call. It is assumed that the signal includes the pair channel number (CHx in this case) used in communication.
However, the identification code (C-ID) of the device itself is included in the PHY header of the communication frame even in normal communication.

The audio signal transmitted from wireless communication device C is received and demodulated by wireless communication device A in the RX-421MHz band - CHx, but wireless communication device A receives the demodulated signal and the audio signal from its own microphone 57. and is transmitted from the TX-440MHz band-CHm associated with duplex communication as a signal modulated with the combined signal on the carrier.
In addition, in wireless communication device A, when the system control unit 63 confirms that the interrupt request has been received and demodulated in the RX-421MHz band - CHx, the system control unit 63 starts counting the timer 62 to time the time. measure.
Note that the audio signal related to the interrupt request is received and demodulated not only by wireless communication devices A and C, but also by other wireless communication devices B, D, and E in the RX-440MHz band-CHm, and the audio signal is reproduced from the speaker 56. Therefore, the fact that an interrupt request has been made can be shared across the network in real time.
On the other hand, the interrupt request signal transmitted together with the audio signal from the wireless communication device C is received and demodulated by the RX-421MHz band of the wireless communication device A - CHx, and is taken into the system control unit 63, and each identification code (C- ID), (A-ID) and paired channel number (CHx) are extracted and temporarily saved in memory.

Next, when the user of wireless communication device A that has received the interrupt request signal wants to permit the request, the user of the wireless communication device A who has received the interrupt request signal is instructed to turn on the PTT button within a predetermined time (for example, 3 seconds) from the time of reception to permit the interrupt. A voice (for example, "This is A. Permit.") is input into the microphone 57.
The voice is transmitted from TX-440MHz-CHm of wireless communication device A, and received and demodulated by RX-440MHz-CHm of other wireless communication devices B to E, as in the case of a call using duplex communication. Since the audio is played back from the speaker 56, the fact that the interrupt request has been granted can be shared across the network in real time.
Note that if the PTT button is not turned on within the predetermined time, the timer 62 will count out and the interrupt request will be ignored as not being permitted.

In wireless communication device A, when the PTT button is turned on, the system control unit 63 uses the previously saved identification codes (C-ID), (A-ID) and paired channel number (CHx) to Create a network control command [NET-CONT(a)] using -440MHz band - Transmit sequentially from CHm.

Here, the network control command is coded information related to the combination of two of the five wireless communication devices A to E and the pair channel number (CHm or CHx) used in the next duplex communication, and is coded in advance. There are 20 [= ₅ C ₂ ×2] types of commands, and in this case, the command selects the combination of wireless communication devices A and C and the paired channel number CHx.
In addition, the clearing signal (CDS) terminates duplex communication within the network (in this case, duplex communication between wireless communication devices A and B), and waits for all wireless communication devices A to E in the network. This is a signal that puts the device in the receiving state.

Then, like the voice signal, the response signal is also received on the RX-440MHz band-CHm of wireless communication devices B to E through the 440MHz band-CHm channel, and the wireless communication device A receives the response signal based on the response signal created by itself. In addition, in the wireless communication devices B to E, the system control units 63 of each of the wireless communication devices A to E control and change the operating state of each wireless communication device based on the received response signal.

That is, first, wireless communication devices A and B execute a line disconnection procedure between themselves based on the call clearing signal (CDS) to terminate duplex communication, and then each wireless communication device A to E issues a network control command [ NET-CONT(a)] as an index and executes the corresponding control program to move the machine to each predetermined state.

More specifically, each wireless communication device A to E has 20 patterns of network states in which two wireless communication devices perform duplex communication and another wireless communication device intercepts the duplex communication. It is equipped with a control program that uses the corresponding network control command data as an index to change the own machine to an individual operating state in each network state, and when a network control command is received, it controls the own machine using that as an index. By executing the program and shifting the machine to a predetermined operating state, the network is shifted to the configuration instructed by the network control command.
In this case, since the network control command [NET-CONT(a)] consists of each identification code (C-ID), (A-ID) and channel number (CHx), as shown in Figure 6, , the network state is shifted to such that wireless communication devices A and C execute duplex communication on the paired channel of channel number (CHx), and other wireless communication devices B, D, and E intercept the duplex communication. Become.

That is, each of the wireless communication devices A to E executes a control program corresponding to the network control command [NET-CONT(a)] and enters the following operating state.
(1) Wireless communication devices A and C mutually execute a line connection procedure and enter a duplex communication state using the paired channel with channel number CHx.
(2) Wireless communication devices A and C are channels with channel numbers CHm, which are channels (interrupt channels) in the same frequency bands as the receiving side frequency bands (421MHz band and 440MHz band) in each duplex communication. is set in the reception demodulator 53, and RX-421MHz band-CHm and RX-440MHz band-CHm are kept active.
(3) In each wireless communication device A, C, the output signals of RX-421MHz band-CHm and RX-440MHz band-CHm related to the interrupt channel are combined with the input signal from the microphone 57 by the input/output control unit 54. It is input to the TX-440MHz band-CHx and TX-421MHz band-CHx related to duplex communication, and is combined with the output signals of RX-421MHz band-CHx and RX-440MHz band-CHx related to duplex communication. A signal circuit is configured such that the signal is output to the amplifier 55/speaker 56 side.
(4) In wireless communication devices B, D, and E, each receiving and demodulating means 52 and 53 are set to the pair channel of channel number CHx related to duplex communication of wireless communication devices A and C, and RX-440MHz band-CHx is set. , RX-421MHz band-CHx are made active, and the respective demodulated signals are combined in the input/output control unit 54, and a signal circuit is configured such that the signal is output to the amplifier 55/speaker 56 side.

As a result, the network transitions from the configuration shown in FIG. 4 to the configuration shown in FIG. As desired, the communication is switched to duplex communication using the paired channel with channel number CHx between wireless communication devices A and C, and the wireless communication devices B, D, and E, which will intercept the duplex communication, use the paired channel with channel number CHm. In addition, since wireless communication devices A and C in the new network each keep one of the paired channels with channel number CHx active as the interrupt channel, the new network Even in the case of wireless communication devices A and C, it is possible to configure a network in which two wireless communication devices that perform duplex communication are changed in response to an interrupt request from a wireless communication device other than wireless communication devices A and C, and duplex communication can be performed on-demand. It is possible to build a network system that can change.
In addition, when the network configuration is changed, the identification information of the wireless communication device in the duplex communication state displayed on the liquid crystal display section 64 of each wireless communication device A to E, and the information used in the duplex communication Channel information and interrupt frequency information are obtained by the system control unit 63 of each wireless communication device A to E based on the received signal, as shown in the change from FIG. 4(b) to FIG. 6(b) in this embodiment. By performing display control based on the above, the changed content is rewritten and displayed each time.

By the way, in the network systems shown in FIGS. 4 to 6, in the interrupt request of wireless communication device C, the pair channel used in duplex communication of the network after the change is set as the channel number CHx, and the pair channel used in the duplex communication before the change is specified. However, without switching in this way, the paired channel with channel number CHm is always used for duplex communication, and the paired channel with channel number CHx is used for interrupt requests. You may also use it.

In that case, as shown in the signal sequence flow of FIG. 7, the channel number of the paired channel specified by the wireless communication device C in the interrupt request signal is simply set to CHm, and the wireless communication device A allows the interrupt request. As shown in the signal sequence flow in Figure 7 and the network configuration in Figure 8, the network control command [NET-CONT(b)] of the response signal when Interrupt requests are executed on the paired channels with channel numbers CHm, and the channels for each interrupt request for these wireless communication devices A and C are set in the paired channels with channel numbers CHx, while the channels with channel numbers CHm are set for the wireless communication devices B, D, and E. The channel is in reception status.
As is clear from comparing the network configurations in FIG. 8(a) and FIG. 3(a), in the network configuration in FIG. 8, wireless communication device B and wireless communication device C in FIG. 3 are simply replaced. .
In this way, the advantage of always using paired channels with the same channel number for duplex communication is that when changing the network configuration based on an interrupt request, the paired channel that was being used just before is used. Therefore, there is a low possibility that the result of carrier sense will be invalid in the line connection procedure for new duplex communication.

Regarding the usage method of the two paired channels (channel numbers: CHm and CHx), instead of using them alternately or regularly as mentioned above, they are used when the S/N ratio is below a specified level in the current duplex communication. In some cases, the paired channel used in the duplex communication may be switched to the other paired channel.

Next, the network configuration diagram of FIG. 9 and the signal sequence flow diagram of FIG. 10 show that in the network configuration of FIG. 6 that has been transferred from the network configuration of FIG. This figure shows the states and signal sequences of each of the wireless communication devices A to E when an interrupt request is made with wireless communication device D as the duplex connection request destination and CHm as the channel number of the paired channel to be used.
In this case, the interrupt request destination of wireless communication device B, which is the interrupt request source, is wireless communication device A, but the communication request destination desired by wireless communication device B is wireless communication device D, and wireless communication device A requests an interrupt. When the request is accepted and approved, duplex communication occurs between the wireless communication devices B and D in the next network, and the wireless communication device A becomes the communication eavesdropping side together with the wireless communication devices C and E.

The procedures related to interrupt requests and network control are basically the same as those described with reference to FIG.
However, the interrupt request source, duplex connection request destination, and pair channel used for the next duplex communication are different.
That is, as is clear from comparing FIG. 5 and FIG. 10, regarding the interrupt request, the interrupt request source changes from wireless communication device C to wireless communication device B, and the channel number of the paired channel used in the next duplex communication is CHx. becomes CHm, and the duplex connection request destination of the interrupt request source changes from wireless communication device A (A-ID) to wireless communication device D (D-ID), and a duplex connection is established between wireless communication devices B and D. This called for a shift to a network configuration.
Therefore, the channel setting control of the reception/demodulation units 52, 53 and the modulation/transmission unit 59 in the wireless communication device B, which is the source of the interrupt request, is naturally different from the case shown in FIG. 5, and the voice input by the user of the wireless communication device B is also ``This is B. Please let me talk to Mr. D.'' However, from the perspective of the procedure alone, the wireless communication device C and the wireless communication device B have been switched between FIG. 5 and FIG. 10.

5 and 10 in that the wireless communication device A sends a voice permission notification in response to the PTT button ON operation, as well as a network control command and a call termination signal (CDS) regarding the permission response to the interrupt request. The steps are the same.
However, the network control command [NET-CONT(c)] in FIG. This corresponds to a new network configuration in which the network intercepts the duplex communication.

Therefore, first, based on the call clearing signal (CDS), wireless communication devices A and C execute a line disconnection procedure between themselves to terminate duplex communication, and each wireless communication device A to E is placed in a standby state. , each wireless communication device A to E uses the network control command [NET-CONT(c)] as an index and reads and executes the corresponding control program, so that the wireless communication devices B, The network configuration will be shifted to one in which D performs duplex communication on the paired channel with channel number (CHm), and other wireless communication devices A, C, and E intercept the duplex communication, as shown in Figure 5. When compared in Figure 10, the combinations of wireless communication devices that execute the line disconnection procedure and line connection procedure are different, and each paired channel applied to duplex communication and interrupt frequency has a channel number (CHx and CHm). The procedure is basically the same, just reversed.

From the above, the wireless communication network system according to this embodiment is configured of wireless communication devices A to E, which are specified low power wireless stations, and the two wireless communication devices perform duplex communication using paired channels. However, in a network configuration in which other wireless communication devices are intercepting the duplex communications of the two wireless communication devices, any other wireless communication device can send a request to one of the two wireless communication devices from any other wireless communication device. By making an interrupt request specifying the communication request destination wireless communication device, the interrupt request source wireless communication device and the communication request destination wireless communication device replace the two wireless communication devices and perform duplex communication. It is possible to gradually change the wireless communication device that performs duplex communication on-demand.

Note that in the above, the audio signal is transmitted when the PTT button is turned on, but by setting the VOX mode in advance, automatic transmission is performed by audio input using the VOX function. This also applies to the second and third embodiments below.

<Embodiment 2>
The wireless communication network system of Embodiment 1 describes the case where there is a single interrupt request, but in this embodiment, after there is one interrupt request, the wireless communication device that directly receives the interrupt request This relates to processing when another interrupt request is received before a response signal is sent.

In this embodiment, as shown in FIGS. 12 and 13, wireless communication devices A and B perform duplex communication (channel number of paired channel: CHm), and other wireless communication devices C to E perform duplex communication. In the state where communication is being intercepted (initial state in Figure 3), after an interrupt request (IRQ1) is sent from wireless communication device C to wireless communication device A, wireless communication device A sends a response signal to the interrupt request (IRQ1). An example will be explained in which there is an interrupt request (IRQ2) from the wireless communication device E before transmitting the .
However, although the duplex connection request destination for each interrupt request (IRQ1) and (IRQ2) is wireless communication device A, for the pair channel used for duplex communication, the channel number CHx is used for the interrupt request (IRQ1). Yes, and the interrupt request (IRQ2) has channel number CHm.

In this case, both wireless communication devices C and E transmit interrupt request signals IRQ1 and IRQ2 on the TX-421MHz band-CHx, and wireless communication device A transmits those interrupts on the RX-421MHz band-CHx, which is open for interrupts. Receive request signals IRQ1 and IRQ2 one after the other.
Then, the system control unit 63 checks the source of each interrupt request signal IRQ1, IRQ2 from the identification code C-ID, E-ID included in the signal, and issues the network control command [NET-CONT(d)]. generate.
In addition, before transmitting the interrupt request signal, on wireless communication devices C and E, the user turns on the PTT button and receives a voice message requesting communication with wireless communication device A (for example, "This is C/E. Please let me talk to Mr. A.'') is input from microphone 57 and transmitted on TX-421MHz band-CHx, so the user of wireless communication device A receives an interrupt request from wireless communication devices C and E. We have confirmed that.

Therefore, the user of wireless communication device A turns on the PTT button and sends a voice message to the effect that he would like wireless communication devices C and E to discuss (for example, "This is A. Mr. C and Mr. E, please talk. ) is input from the microphone 57 and transmitted from the TX-440MHz band-CHm, and the network control command [NET-CONT(d)] and call termination signal (CDS) are also transmitted as response signals.
This network control command [NET-CONT(d)] causes wireless communication devices C and E to enter a duplex communication state using the paired channel with channel number CHx, and each transmits its own device on the paired channel with channel number CHm. A channel in the same frequency band as the receiving side frequency band of duplex communication is set as an interrupt frequency, and wireless communication devices A, B, and D are placed in a state to intercept duplex communication of wireless communication devices C and E. be.

Therefore, the wireless communication device A that sent the network control command [NET-CONT(d)] and the call clearing signal (CDS) and the other wireless communication devices B to E that received it are based on the call clearing signal (CDS). After wireless communication devices A and B execute the line disconnection procedure to terminate duplex communication and put each wireless communication device A to E into a standby state, each wireless communication device A to E issues a network control command [ NET-CONT(d)] as an index and reads out the corresponding control program from its own memory and executes it. As shown in Figure 14, wireless communication devices C and E execute the line connection procedure and connect to the channel. A state of duplex communication using the pair channel number CHx is entered, and wireless communication devices A, B, and D move to a new network where they are in a state of intercepting the duplex communication.
Note that in the first embodiment, the wireless communication devices C and E keep RX-LB-CHm and RX-HB-CHm active using the paired channel with channel number CHm so that they can receive interrupt requests. This is the same as in the case of each wireless communication device related to duplex communication.

By the way, the above describes the case where two interrupt requests (IRQ1) and (IRQ2) are made to the RX-421NHz-CHx of wireless communication device A one after the other, as shown in FIGS. 12 and 13. However, wireless communication devices A and B that are performing duplex communication open the reception demodulation sections 53 (RX-421MHz-CHx) and (RX-440MHz-CHx) of the interrupt channels, respectively, and wireless communication device C , E can issue an interrupt request to either wireless communication device A or B.

Therefore, as shown in FIG. 15, if an interrupt request (IRQ1) is made from wireless communication device C to wireless communication device A, then an interrupt request (IRQ2) is made from wireless communication device E to wireless communication device B. There is also.
In such a case, wireless communication device A, which has directly received the interrupt request (IRQ1) from wireless communication device C, sends a voice message and a response signal ([NET-CONT(d)], ( Responsible for the process of sending CDS)).

As a result, for each interrupt request of wireless communication devices C and E, coordination between the users of wireless communication devices C and E is attempted through calls in the newly migrated network, and one of the wireless communication devices C and E is Some conclusions have been drawn, such as that it is possible to avoid conflicts with interrupt requests by shifting to duplex communication with wireless communication device A, and that it is better to shift to other duplex communication in which wireless communication device A is not a party to the call. There may be some gains, and the coordinated operation in this embodiment is reasonable.

<Embodiment 3>
The wireless communication network systems of Embodiments 1 and 2 above request that a wireless communication device in a communication interception state designate another specific wireless communication device to transition to a network state in which it establishes a duplex connection with itself. However, in this embodiment, the interrupt request does not have such a purpose and therefore does not specify a specific wireless communication device.
For example, this is the case when one wireless communication device that is intercepting communications asks a question to the entire network, and when an interrupt request is received from a wireless communication device that can answer the question. , make duplex connection between both wireless communication devices.

In this embodiment, wireless communication devices A and B are performing duplex communication (channel number of paired channel: CHm), and other wireless communication devices C to E are intercepting the duplex communication ( In the initial state of Fig. 3), there is an interrupt request (IRQ1') from the wireless communication device C to the RX-421NHz-CHx of the wireless communication device A, and within a predetermined time (for example, 3 seconds) from the time of the request, the wireless communication device E An example will be explained in which there is an interrupt request (IRQ2').
In reality, an interrupt request (IRQ3') may be further made from the radio communication device D within the predetermined time, but in this embodiment, only the first two interrupt requests (IRQ1', IRQ2') are made. Treated as subject to processing.

Wireless communication device A that received the interrupt request (IRQ1', IRQ2') transmits a network control signal and a communication end signal, and after terminating the duplex communication of wireless communication devices A and B, wireless communication devices C and E executes the line connection procedure and enters a duplex communication state using the paired channel with channel number CHx, and a new network state is configured in which wireless communication devices A, B, and D enter the state of intercepting the duplex communication. That will happen.
Therefore, for a schematic configuration diagram of the wireless communication network in this embodiment, reference can be made to FIG. 12, FIG. 14, and FIG. 15 used in the second embodiment.
On the other hand, regarding the signal sequence, it basically proceeds in a procedure similar to that in FIG. 13, but there are differences in the contents of the signals, etc., and the signal sequence flow diagram in FIG. 16 is referred to.

First, referring to FIGS. 12 and 16, two interrupt requests (IRQ1', IRQ2') are received from the wireless communication device C and the wireless communication device E to the RX-421NHz-CHx of the wireless communication device A within the predetermined time. However, unlike the interrupt requests (IRQ1, IRQ2) in the second embodiment, each interrupt request (IRQ1', IRQ2') does not specify a specific connection destination, but as shown in FIG. , an audio signal accompanying the ON operation of the PTT button, and the identification code (C-ID, E-ID) of each aircraft.

Specifically, the user of wireless communication device C turns on the PTT button and receives a voice message such as "Does anyone know about 〇〇?" and the device's identification code (C-ID). When transmitting an interrupt request (IRQ1'), wireless communication device A synthesizes the interrupt request (IRQ1') received and demodulated in the RX-421MHz band-CHx for interrupts with the transmission audio signal related to duplex communication and transmits the signal. Therefore, the interrupt request (IRQ1') can be confirmed even in the wireless communication devices D and E that are intercepting the duplex communication, and in this case, the wireless communication For example, the user of communication device E turns on the PTT button and sends an interrupt request (IRQ2') consisting of a voice message saying "I know!" and the device's identification code (E-ID). Cases are expected.

On the other hand, upon confirming the two interrupt requests (IRQ1', IRQ2'), wireless communication device A automatically sends the network control command [[ NET-CONT(d)] and a call termination signal (CDS).
In this case, unlike in the second embodiment, the user of the wireless communication device A does not turn on the PTT button to intervene with a voice message, but automatically responds with only a response signal.

Here, the network control command [NET-CONT(d)] is the same as in the second embodiment, and puts the wireless communication devices C and E into a duplex communication state using the paired channel with channel number CHx, and Each of them sets a channel in the same frequency band as the reception side frequency band of its own duplex communication in the paired channel with channel number CHm as the interrupt frequency, while wireless communication devices A, B, and D are set as the interrupt frequency. This is a command corresponding to the network state in which the duplex communication of wireless communication device A is intercepted, and the call termination signal (CDS) terminates the duplex communication between wireless communication devices A and B, and also terminates all duplex communication in the network. This is a signal that puts the radio communication devices A to E in a standby state.

Therefore, the subsequent changes in the network configuration are the same as those in the second embodiment (FIGS. 13 and 14), and wireless communication devices A and C mutually perform line disconnection procedures based on the clearing signal (CDS). After completing the duplex communication and putting each wireless communication device A to E into a standby state, each wireless communication device A to E uses the network control command [NET-CONT(d)] as an index and performs the corresponding control. By reading and executing the program, as shown in FIG. 14, wireless communication devices C and E execute the line connection procedure and enter a duplex communication state using the paired channel with channel number CHx, and wireless communication device A ,B,D move to a new network whose duplex communications are being intercepted.
In addition, as the pair channel used for duplex communication in the new network, use the pair channel on the interrupt frequency side in the network state before migration, or continue to use the pair channel on the duplex communication side before migration. As for either, it may be determined in advance that one of them will be used, and this may be reflected in the control program.

INDUSTRIAL APPLICABILITY The present invention can be used in a wireless communication network consisting of commercial wireless communication devices that are specified low-power wireless stations.

51...Antenna, 52,53...Receiving and demodulating section, 54...Input/output control section, 55...Amplifier, 56...Speaker, 57...Microphone, 58...Amplifier, 59...Modulation transmitting section, 60...Antenna, 61...Operation section, 62...Timer, 63...System control section, 64...Display section, 110...Base unit, 120-1 to 3...Slave unit, 130...First slave unit, 131,132...Signal synthesis means, 133...Speaker, 134...Microphone , 140...second slave unit, 141...third slave unit, 201,202,203-1~n...wireless communication device.

Claims (8)

A wireless communication network consisting of three or more wireless communication devices that are specified low-power wireless stations,
Two wireless communication devices in the network (hereinafter referred to as "first and second wireless communication devices") perform duplex communication using the first pair channel, and each performs duplex communication using the first pair channel. keeping active a reception demodulation means for a frequency in the same frequency band as the reception side frequency band of the duplex communication of the own device (hereinafter referred to as "interrupt frequency") in a second pair channel different from the pair channel, and The output signal of the reception and demodulation means for the interrupt frequency is combined with the audio signal from the audio input means and outputted to the modulation and transmission means for the duplex communication, and the output signal of the reception and demodulation means for the interrupt frequency is combined with the audio signal from the audio input means. While in a duplex communication state in which the signal is synthesized with the output signal of the reception demodulation means related to duplex communication and output to the audio output means,
A wireless communication device other than the first and second wireless communication devices in the network keeps active two reception demodulation means each having each frequency of the first paired channel as a reception frequency, and In a state of the network in a communication interception state (hereinafter referred to as "first network state") in which each output signal of the reception demodulation means is synthesized and outputted to the audio output means,
A wireless communication network, characterized in that the wireless communication device in the communication eavesdropping state uses the interrupt frequency to issue an interrupt request for transitioning to a network state in which the wireless communication device is a terminal on one side of duplex communication. system. In the first network state,
One of the wireless communication devices (hereinafter referred to as the "third wireless communication device") that is in a communication intercept state changes to the interrupt frequency by operating the PTT (Push to Talk) button or by using the VOX (Voice Operated Relay) function. The modulation transmission means is activated, and the self-transmission device sends an audio signal requesting communication between the own device and a specific wireless communication device other than the own device (hereinafter referred to as the “fourth wireless communication device”). When transmitting an interrupt request signal including identification information of the wireless communication device and the fourth wireless communication device, and paired channel information indicating which of the first or second paired channel is to be used,
The first or second wireless communication device receives the interrupt request signal so that the third and fourth wireless communication devices replace the first and second wireless communication devices with respect to the paired channel. a network control command for configuring a second network state in which a duplex communication state using a pair channel indicated by the information is entered and radio communication devices other than the third and fourth radio communication devices are in a communication eavesdropping state; transmitting a response signal consisting of a communication end signal for terminating the duplex communication of the first and second wireless communication devices from the modulation transmitting means related to the duplex communication;
Each wireless communication device in the wireless communication network that has transmitted and received the response signal executes a corresponding control program stored in advance in the wireless communication device based on the communication end signal and the network control command. The wireless communication network system according to claim 1, wherein the first network state is transitioned to the second network state. In the first or second wireless communication device that has received the interrupt request signal, if the interrupt request is to be permitted, the first or second wireless communication device that has received the interrupt request signal must operate the PTT button or The wireless communication according to claim 2, wherein the response signal is transmitted together with an input audio signal to the effect that the interrupt request for activating the VOX function is permitted, and when the interrupt request is not permitted, the request is ignored. network system. In the first network state configured of four or more wireless communication devices that are specified low power wireless stations, the first or second wireless communication device receives the interrupt request signal from the third wireless communication device. After receiving, and before transmitting the response signal, another interrupt request signal is received from another wireless communication device in the wireless communication network (hereinafter referred to as "fifth wireless communication device"). ,
By receiving the two interrupt request signals, the first or second wireless communication device initiates communication between the third and fifth wireless communication devices that involves operation of the PTT button or activates the VOX function. In response to an input audio signal requesting the above, the third and fifth wireless communication devices enter a duplex communication state in the pair channel indicated by the pair channel information in such a manner that they replace the first and second wireless communication devices. , a network control command for configuring a third network state in which wireless communication devices other than the third and fifth wireless communication devices are in a communication interception state, and duplex communication of the first and second wireless communication devices. transmitting a response signal consisting of a communication end signal for terminating the communication from a modulation transmitting means related to duplex communication;
Each wireless communication device in the wireless communication network that has transmitted and received the response signal executes a corresponding control program stored in advance in the wireless communication device based on the communication end signal and the network control command. 4. The wireless communication network system according to claim 3, wherein the first network state is transitioned to the third network state. Each of the interrupt requests from the third wireless communication device and the fifth wireless communication device corresponds to each interrupt frequency of the second paired channel set by the first or second wireless communication device, respectively. If the interrupt request is made individually to the first or second wireless communication device, whichever one of the first or second wireless communication device directly received the interrupt request from the third wireless communication device; The wireless communication network system according to claim 4, wherein the wireless communication network system transmits the input audio signal and the response signal. In the first network state configured of four or more wireless communication devices that are specified low power wireless stations,
Each of the plurality of wireless communication devices in a communication intercept state activates the modulation transmission means related to the interrupt frequency by operating the PTT button or by using the VOX function, and transmits any audio signal and identification information of the own device. Sends an interrupt request signal consisting of
If the first or second wireless communication device receives another interrupt request signal within a predetermined time after receiving the first interrupt request signal, the first or second wireless communication device: The wireless communication devices that transmitted those interrupt request signals switch places with the first and second wireless communication devices, and enter into a duplex communication state using the first or second pair channel, and other wireless communication a response signal consisting of a network control command for configuring a new network state in which the device enters a communication interception state, and a communication termination signal for terminating duplex communication of the first and second wireless communication devices; transmitted from a modulation transmission means related to communication,
Each wireless communication device in the wireless communication network that has transmitted and received the response signal executes a corresponding control program stored in advance in the wireless communication device based on the communication end signal and the network control command. 2. The wireless communication network system according to claim 1, wherein the wireless communication network system transitions from one network state to the new network state. When the first and second wireless communication devices receive each of the interrupt signals separately and directly within the predetermined time with the reception demodulation section of the respectively set interrupt frequency, 7. The wireless communication network system according to claim 6, wherein of the two wireless communication devices, the one that directly receives the first interrupt request signal transmits the response signal. Each of the wireless communication devices in the wireless communication network includes two wireless communication devices performing duplex communication, a pair channel used in the duplex communication, and a receiving state of the two wireless communication devices. 8. The wireless communication network system according to claim 1, wherein each piece of information related to each interrupt frequency set is displayed on a display section of the wireless communication network system.

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