JPH0522219A - Radio communication system - Google Patents

Abstract

PURPOSE:To fulfill the pager function by using the identification code of an opposite station transferred from a master set so as to allow a slave set to reply the opposite set directly, thereby informing the incoming of a call to the operator of the master set immediately even when the operator is absent, thereby allowing the operator to reply the call quickly. CONSTITUTION:Stationary type and mobile type main communication equipments being a master set 1 and a handy slave set 1' are combined and when a call signal 21 is received by the master set 1 but the master set does not immediately reply the call, the call signal 21 is transferred to the slave set 1' of a present station. Thus, when the operator leaves the master set 1 with the slave set 1', the operator replies directly with a call bell signal or returns immediately to the master set 1 and makes a reply even when the direct communication is not available. That is, when the reply is not made till the call signal 21 is stopped, the master set transfers 'incoming of call' to the slave set and the slave set notifies the call with bell and incoming display. Then the slave set is operated to send a reply signal 11' to the opposite station 2 to get a speech channel for direct talking.

Description

Detailed Description of the Invention

[0001]

This invention relates to a wireless communication device,
Particularly, it relates to an operational improvement in the individual selection communication system.

[0002]

2. Description of the Related Art Main functions of an individual selection communication system in a wireless communication device will be described. The amateur radio communication started with communication between unspecified large number of stations, but for the sake of convenience, scheduled communication occurred in which frequency and time were set between specific stations.

Since then, with the increase in the number of amateur radio stations and the reduction in size and weight of portable devices, the use of radio communication for practical communication such as communication has been rapidly expanding. At that time, there are many operating stations in the limited frequency band, so you will hear many unnecessary calls other than the desired partner station,
It had the drawback of being annoying.

As a countermeasure against this, an individual selection communication system has been developed, which is composed of an individual calling system and an individual response system. As related technology for that purpose, <individual code> is a code for identifying each radio station. Originally, radio stations were identified by internationally determined call signs, but automatic identification by machines is difficult, and radio equipment for local use is not necessary. Use the code for. Similar to the push dial of a telephone, this code converts a number into a specific tone with a tone encoder, transmits it, and receives it with a tone decoder.

<Group code> Since the group code is used for group communication, the same individual code is used for the entire group, and it is possible to have both individual and group codes.

<Operation of Specific Tone Squelch> The squelch circuit is opened only for the received wave including the specific tone frequency signal which is the simplest individual code, and the tone signal set by the partner station is transmitted at the time of transmission.

<Bell operation> and <Incoming call display> An electronic sound informs that the communication device in the standby state has received a radio wave, and the individual code of the partner station is displayed on the display. However, if the received wave does not indicate the individual code of the own station, the bell does not work, and only the incoming call display works.

<Call channel> In a communication system in which a large number of communication devices share a large number of communication channels, such as a personal radio, in order to avoid interference and perform reliable communication, a call channel dedicated to calling is used first. A call is made that includes the individual code of the station and its own station, and after contacting, the system switches to an idle channel and makes a call.

Even in amateur radio that is relatively free to operate within the assigned frequency band, especially in frequency bands that are frequently used for mobile communications, call channels are set and individual selective calling functions are adopted, so that they are similar to commercial radios. The applications used for practical purposes are expanding.

[0010]

There is a "pager" as the simplest wireless communication device, but only by calling
Calls will be made using wired telephones, and a "personal radio" was developed to compensate for the inconvenience, but it is a low power type to make it a handy type, and it is necessary to go through a relay station except for short distances. Yes, there is a problem that the range of use is limited.

In amateur radio, an operation qualification is required, but when an external power source is available such as a stationary type or a mobile device, a large transmission power can be used according to the qualification, and an efficient external antenna can be used. In combination with this, it is natural that the communication range with the handy type child device can be expanded by using this as the parent device.

It has become commonplace for this kind of equipment to have an individual selective calling function for amateurs as well as for business use. However, unlike handy machines, there is no operator nearby. Since it is not limited, even if the bell is operated due to an individual call, it is not possible to respond immediately, and even if you call the response after seeing the incoming call display later, it will not be suitable during an emergency, so it is not always practical. There was no side.

[0013]

In the present invention, a stationary or mobile main communication device as a master unit and a handy slave unit are combined so that the master unit receives a call signal to its own station. If the response operation is not performed immediately, the call signal is transferred to the handheld device attached to the own station, which is a child device, so that the handy type child device can be used when the operator leaves the parent device. If you bring it with you, the handset can respond directly by calling the bell signal, and even if direct communication is not possible, you can immediately return to the base unit and respond.

The sequence of operations is illustrated in FIG. 1 own main engine (base unit), 1 'own station handy machine (slave machine), 2 may be a plurality at the other stations. <First Stage> The second station transmits the individual call signal 21 including the individual code of the first station and the individual code of the own station, and the base unit 1 gives a bell operation and displays an incoming call. <Second stage> If the response operation is not performed before the calling signal 21 is stopped, the master unit 1 transfers "incoming call" to the slave unit 1 '. The individual code of the slave unit 1 ′ may be separate from that of the master unit 1 , but if they are set to be the same, the transfer signal 11 is the call signal 2
1 may be transferred as it is. The handset 1 In response to this' is to announce the call by the bell operation and the incoming call display. Other station a 'response signal 11 by operating the'<Thirdstage> handset 1
Send to 2, and if it is a call channel, move to the call channel. <Fourth stage> Direct communication between the handset 1 ′ and the partner station 2 .

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In describing the embodiments of the present invention, first, <pager> as <individual call function>
An "individual call" operation for making a call only to a specific station, which is one of the "operations", will be described.

(1) For pager operation, a separate pager code is set for each station. This code is 000 to 9
DTMF (Dual represented by three-digit number up to 99)
Tone Multi Frequency) signal combination.

(2) The individual codes of station A are Pa1 and Pa2
・ Pa3 and the individual code of station B is Pb1, Pb2, P
Assuming b3, the transmission format when station A calls station B is as shown in (A) in the signal configuration diagram of the pager signal in FIG. 2, and the transmission format when station B responds to station A is ( It looks like B). Further detailed transmission timing of the pager operation is shown in (C), and reception timing is shown in (D).

(3) The B station compares the received calling code with the individual code of the B station which is written in the code memory in advance in the calling signal decoding circuit section. At the same time as notifying, the squelch is opened and the call signal is sent to the control circuit section composed of the CPU, and the control circuit temporarily stores the call signal of FIG. 2 (A) in the code memory and displays the code number of station A on the incoming call display. ..

(4) When the operator of station B presses the send button for a response, the above display disappears and radio waves of the format shown in FIG. 2 (C) are emitted. If station A receives this, station B is sent. It can be understood that the transmission is more than that, and after that, normal communication can be performed.

(5) When the operator of the station B is absent, he / she will see the incoming call display on the display and contact again.

In order to carry out the present invention, a transfer switch 301 is provided as shown in FIG. 3, and when it is turned off, there is no difference from the prior art, but when it is turned on, it operates as follows. In FIG. 3, (1) When the receiving circuit section 100 receives a radio wave, it sends out <carrier present signal 101> to the control circuit section 300.

(2) The <received signal 102> is compared with the call code of its own station by the call signal decoding circuit 200, and if they match, <call signal present 201> and <call signal 202> are output to the control circuit section 300. To send to.

(3) The control circuit section 300 reads the <call signal 202> corresponding to FIG. 2B and stores it in the code memory. (Other normal operations are omitted)

(4) When the transfer switch 301 is ON, the control circuit section 300 waits for the disappearance of the <carrier present signal 101> and sends out the <reception circuit control signal 302> and the <transmission circuit control signal 303>. To send. At this time, since it is also desirable to switch the transmission power to <LOW>, the low power setting may be linked when the transfer switch 301 is turned on. Further, as the <transfer signal 304>, the <call signal 202> temporarily stored in the code memory may be output as it is. The transmission signal encoding circuit unit 400 converts it into the <transmission signal 401>, and the transmission circuit unit 500 modulates it. Transmission is performed, and this becomes a transfer signal.

(5) In order to receive the transfer transmission signal, when the operator leaves the seat, the portable <slave unit> of the same band as the <slave unit> is set to the transmission frequency and individual code of the <slave unit>. Bring them together in the <standby reception> state, and if the incoming call bell is sounded by the transfer and transmission signal, immediately respond to the prompt by A
You can communicate with the station. If the radio wave from station A is sufficiently strong, the <slave unit> will know <incoming call> directly before <transfer>, but since <transfer> is performed at a close range, the certainty is high. The <slave unit> used here may have the same pager function as the <slave unit>.

(6) Since this function does not operate if the transfer switch 301 is forgotten to be turned on, the transmission time of the <transfer signal> is extremely short even if it is set to <always transfer>, which causes an obstacle to other stations. Although it is almost unlikely, the safety can be further improved by controlling the transmission power to <LOW> at the same time as the <transmission circuit control signal 303> is generated.

(7) FIG. 4 shows a schematic flow chart of the operation program of the CPU constituting the control circuit section 300 for the above-mentioned functional operations.

[0028]

The present invention, as described in detail in the above items,
Even when the operator has to move away from his / her own base station that is using the individual call communication method (standby reception), the operator's location is indoors or in a building Even if the reception condition of is bad, you can know that there is an incoming call by <transfer signal> and immediately move to a place where you can communicate and answer with the handset you bring or return to the master and answer. Since it is possible, the operator can work away from the master unit with peace of mind, and has the effect of fully exerting the pager function.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a transfer operation according to the present invention.

FIG. 2 is a signal configuration diagram of a pager signal.

FIG. 3 is a block diagram of a call signal transfer circuit.

FIG. 4 is a schematic flowchart of a control circuit unit program.

[EXPLANATION OF SYMBOLS] 1 own main engine (base unit) 1 'own handheld device (handset) 2 counterpart station 100 receiving circuit section 101 carrier presence signal 102 received signal 200 call signal decoding circuit 202 call signal 300 control circuit 301 Transfer switch 302 Reception circuit control signal 303 Transmission circuit control signal 304 Transfer signal 400 Transmission signal encoding circuit 401 Transmission signal 500 Transmission circuit unit

Claims (1)

Claim: What is claimed is: 1. In a wireless communication device having an individual selection communication function, when the identification code of the own station is detected in a received wave, a calling signal including the identification code of the partner station is transferred to the child device. And the means for the slave unit to capture the identification code of the partner station transferred from the master unit, and the means for responding to the partner station directly from the slave unit by using the identification code. At times, a wireless communication method that enables direct response communication from a child device.