JPH0722982A - Radio equipment - Google Patents

Abstract

PURPOSE:To prevent the disconnection of lines even when the radio communication state is continued for a relatively long time by holding lines between respective stations by setting the frequency of set of line holding operation within a specific time in the case of performing the mutual communication between a calling station and a called station and holding lines on the side of transmission end station. CONSTITUTION:When a communication switch 15 is turned on, a call instruction is sent to a transmission control part 6. The control part 6 outputs transmission instruction signals 6a and 6b. Upon reception of the signal 6a, a transmission part 3 becomes the transmission state. An antenna transmission/reception switching part 11 performs transmission. Then, when a speech witch 15 is turned off, the control part 6 stops the output of the instruction signals 6a and 6b. Therefore, the transmission part 3 is stopped and the antenna transmission/ reception switching part 11 becomes the reception state and a counter 10 is set. Then, when the output of a non-carrier signal 12a is stopped from a reception part 12 during the operation of a timer 8 holding lines, the counter 10 recognizes the generation of the reception state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is constructed so that, when a calling station and a called station are receiving each other, if transmission from a partner station cannot be detected within a predetermined time T1, communication is terminated. The present invention relates to an improved wireless device, and more particularly, to improvement of a line holding system between stations.

[0002]

2. Description of the Related Art In a wireless device such as a specific low power wireless device which has been widely spread recently, when calling each other, FIG.
As shown in FIG. 3, the calling station 20 and the called station 30 are connected to each other to establish a mutual receiving state, and then talk to each other. In such a wireless device, when a no-call state is connected for a certain period of time, a state in which no radio wave is transmitted is detected when a state in which no call is made for two seconds continues, for example, The line is automatically disconnected. Therefore, when making a call with an interval of 2 seconds or more, the call must be made after repeating the operation of connecting the line each time.

[0003]

The conventional radio equipment as described above has the following problems. (1) When a call is made after a lapse of a certain time without a call being made, it is necessary to reconnect the line each time and repeat the operation of holding the line, which requires a troublesome reconnection operation. (2) When making a call, it is necessary to be aware of disconnection of the line, which makes it difficult to make a calm call and imposes a psychological burden on the user.

The present invention has been made in consideration of the above problems, and is constructed so that the user is not required to perform a troublesome reconnection operation for the line and the line is maintained without imposing a psychological burden on the user. The purpose of the present invention is to provide a wireless device.

[0005]

In order to achieve the above object, according to the present invention, when the calling station and the called station are receiving each other, the transmission from the partner station cannot be detected within a certain time T1. When the transmission from the partner station is not detected within a certain time T2 (T2 <T1) after the first transmission is stopped after the call with the partner station is started, This fixed time T2 is followed by a fixed time T3
The function to transmit the line hold tone during the period of time (T2 + T3) and hold the line for a period of time (T2 + T3), and after repeating the line hold operation for the set number of times (N1), if the transmission cannot be detected within the fixed time T1 , And has a function of ending a call and waiting for a transmission instruction.

According to another aspect of the present invention, in the above-mentioned aspect of the present invention, when a transmission instruction is issued during the line holding operation or during the transmission monitoring for a predetermined time T1, the transmission operation is performed, and after the transmission operation is completed, the line holding operation is performed. Set number of times N2 (N2 <N1)
After that, when the transmission cannot be detected within the fixed time T1, the telephone call is terminated and the transmission instruction waiting function is provided.

According to another aspect of the present invention, in any one of the above-mentioned aspects of the present invention, when transmission is detected during transmission monitoring for a fixed time T2 during the line holding operation, the line holding operation is stopped and the reception state is set. When transmission cannot be detected within a fixed time T1 from the time point when the call cannot be detected, a function for ending the call is provided.

[0008]

According to the configuration of the present invention as set forth in claim 1, a fixed time T2 (T
When the transmission from the partner station cannot be detected within 2 <T1), the line holding sound is transmitted for a fixed time T3 following this fixed time T2, and the line is held for (T2 + T3) time. After this line holding operation is repeated the set number of times (N1) thereafter, if no transmission is detected within the fixed time T1, the call is terminated and the transmission instruction is waited.

According to the configuration of the present invention described in claim 2,
In the configuration of claim 1, when a transmission instruction is issued during the line holding operation or during the transmission monitoring for a certain time T1, the transmission operation is performed, and after the end of the transmission operation, the line holding operation is set to the set number N2 (N2 <N2 < After repeating N1) only,
When transmission cannot be detected within the fixed time T1, the call is ended and the transmission instruction is waited.

According to the configuration of the present invention described in claim 3,
In the configuration of the present invention according to claim 1 or claim 2, when transmission is detected during transmission monitoring for a fixed time T2 during line holding operation, the line holding operation is stopped to enter a receiving state and transmission is performed. If no transmission can be detected within a certain time T1 from the time when the call cannot be detected, the call ends.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a radio device according to the present invention. 1 is a microphone, 2 is a modulation circuit, 3 is a transmission unit, 4 is a ringing signal generation circuit, 5 is a circuit holding sound generation unit, and 6 is transmission control. Section, 7 is a T1 timer, 8 is a T2 timer, 9 is a T3 timer, 10 is a counter, 11 is an antenna transmission / reception switching section, 12 is a receiving section, 13 is a demodulation circuit, 14 is a voice amplifier, 15 is a call switch, and 16 is A speaker, 17 is a call signal detection unit, and 18 is an antenna. Next, each operation including the line holding operation of the wireless device of the present embodiment performed by each of the above-mentioned constituent parts will be described together with the detailed operation of each constituent part.

(1) Calling operation When the call switch 15 is turned on, the transmission controller 6
A call instruction is given to. The transmission control unit 6 sends the transmission instruction signal 6
a and 6b are output, and the transmission unit 3 enters the transmission state in response to the transmission instruction signal 6a, and the antenna transmission / reception switching unit 11
Becomes a transmission state, the T2 timer 8 that sets T2 for a certain period of time becomes a standby state, and the counter 10 is reset in response to the transmission instruction signal 6b. Further, the transmission control unit 6 instructs the call signal generation circuit 4 to transmit the line connection signal,
The audio amplifier 14 is instructed to stop. As a result, driving of the speaker 16 is prohibited. The call signal generation circuit 4 transmits a line connection signal to the modulation circuit 2.
The modulation circuit 2 sends a modulation signal obtained by modulating the signals from the microphone 1 and the calling signal generation circuit 4 to the transmission unit 3, and the transmission unit 3 passes through the antenna transmission / reception switching unit 11 and the antenna 1
Send from 8.

(2) Line holding operation 1 By turning off the call switch 15, the transmission control unit 6
Stops the output of the transmission instruction signals 6a and 6b. As a result, the transmission unit 3 is stopped, the antenna transmission / reception switching unit 11 is switched to the reception state, and the counter 10 is set (enabled). When nothing is received, the receiver 12 outputs the no carrier signal 12a. As a result, the T1 timer 7 and the T2 timer 8 (T2 <T1) for setting the constant time T1 are started, and the counter 10 recognizes the first non-reception state after the radio of the present embodiment enters the reception state. When the state of no reception continues, the T2 timer 8 ends and the T2 end signal 8a is output. As a result, the T1 timer 7 is reset and the T3 timer 9 for setting a fixed time is started. Further, in response to the T2 end signal 8a, the line holding sound generation unit 5 supplies the carrier frequency modulated by the voice frequency to the voice amplifier 14 and the modulation circuit 2 as the line holding sound for a predetermined time T3, and the transmission control unit 6 Outputs the transmission instruction signal 6a again. As a result, the line holding sound is output. T3 timer 9
Is completed, the T3 end signal 9a is output. In response to this, the line holding sound generation unit 5 stops the line holding sound, and the transmission control unit 6 stops the output of the transmission instruction signal 6a, thereby switching the transmission state to the reception state. Further, the counter 10 integrates the number of line holdings by the T3 end signal 9a and restarts the T2 timer 8. At this time, T2
The end signal 8a of the timer 8 stops and the T1 timer 7 becomes 0.
Start from. After that, unless the output of the no-carrier signal 12a is stopped in the receiving unit 12, the T2 timer 8
Ends again and the above operation is repeated. The counter 10 stops the restart of the T2 timer 8 when the number of times of termination of the T3 timer 9 is measured by a preset line holding frequency N1 (one cycle of the combination of T2 and the subsequent T3 is one). . As a result, the T1 timer 7 is not stopped by the T2 timer 8 and ends. When the T1 timer 7 ends, the end signal 7a is output,
The transmission control unit 6 goes into a standby state, and the voice amplifier 14 goes into a stopped state. Further, the counter 10 recognizes that the call is finished.

(3) Transmission during line holding The call switch 15 is inserted during the line holding operation 1 in (2) above.
When turned on, the transmission control unit 6 instructs the audio amplifier 14 to stop (the speaker 16 is prohibited from driving) and outputs the transmission instruction signals 6a and 6b. This transmission instruction signal 6a
In response to this, the transmission unit 3 enters the transmission state, the antenna transmission / reception switching unit 11 enters the transmission state, the T2 timer 8 enters the standby state in response to the transmission instruction signal 6a, and the counter 10 is reset. However, even if the T1 timer ends and the end signal 7a is output during this period, the transmission control unit 6 does not accept it.

(4) Line holding operation 2 When the output of the no-carrier signal 12a from the receiving unit 12 is stopped (the radio wave is received) during the operation of the line holding T2 timer 8 of (2), the T1 timer 7 is operated. And the T2 timer 8 is stopped. The counter 10 recognizes that a reception state has occurred after the call is started. When the receiving section 12 detects the no-reception state again, when the no-carrier signal 12a is output, the T1 timer 7 and the T2 timer 8 (T2 <T
1) is started, and the counter 10 is in the receiving state.
Recognize the no reception state after the first time. If no reception is continued, the T2 timer 8 ends and the T2 end signal 8a
Is output. As a result, the T1 timer 7 is reset and the T3 timer 9 is started. Further, in response to the T2 end signal 8a, the line holding sound generation unit 5 supplies the line holding sound to the voice amplifier 14 and the modulation circuit 2, and the transmission control unit 6 outputs the transmission instruction signal 6a again. As a result, the line holding sound is transmitted. When the T3 timer 9 ends, the T3 end signal 9a is output. In response to this, the line holding sound generation unit 5 stops the line holding sound, and the transmission control unit 6 stops the transmission instruction signal 6a, thereby switching the transmission state to the reception state. In addition, the counter 10 integrates the number of line holdings by the T3 end signal 9a and the T2 timer 8
Restart. At this time, the end signal 8a of the T2 timer 8 stops and the T1 timer 7 restarts from 0. After that, in the receiving unit 12, the carrierless signal 12a
Unless the output of is stopped, the T2 timer 8 ends again and the previous operation is repeated. The counter 10 counts the number of line holdings N2 (N2 <N1) set in advance by the T3 timer 9
When the number of completions of T2 is measured, the restart of the T2 timer 8 is stopped. As a result, the T1 timer 7 is not stopped by the T1 timer 8 and ends. When the T1 timer 7 ends, the end signal 7a is output, the transmission controller 6 enters the standby state, and the audio amplifier 14 enters the stop state. Further, the counter 10 recognizes that the call is finished.

Next, based on the operation of the wireless device of the present embodiment as described above, an example of holding a line between the calling station and the called station will be described with reference to a timing chart.
Fig. 2 shows that the calling station stopped transmission immediately after connecting to the called station, and the other station did not send any data. 7 is a timing chart showing a closed state. a shows the state of the transmission instruction of the calling station, b shows the state of the transmission carrier of the calling station, c shows the state of the line connection signal transmitted by the calling station, and d shows the call state of the calling station. , And e indicates the call state of the called station. Note that s and s'in c indicate line connection signals. If there is a transmission instruction in a,
The carrier is transmitted as shown in b, and accordingly, the line connection signal s shown in c is transmitted, and the calling station enters the communication state as shown in d. When the called station receives the line connection signal s transmitted by the calling station, the called station enters the call state as indicated by e, and from this point of time, the transmission from the called station is monitored (the fixed time T
When the absence of continuous transmission of 1 is detected, the call status is released.)
To start. After this, when there is no transmission instruction of a, carrier transmission is stopped as in b. After that, a certain time T2
(T2 <T1) Monitor the transmission from the called station. If no transmission is detected during this period, only for a certain time T3 (T3 << T2),
The carrier frequency modulated by the voice frequency is transmitted as the line-holding sound. After that, the transmission monitoring and the line holding sound are repeated for a preset number of times N1 for a certain time T2 until the transmission of the partner station is detected. FIG. 2 shows a case where N1 = 3 is set as an example. In the present embodiment, as described above, the repetition of the transmission monitoring for the fixed time T2 and the transmission of the line holding sound for the fixed time T3 N1 times is called line holding. The calling station monitors the transmission for a certain period of time T1 after the line holding is completed, and if no transmission is detected during this period, d in FIG.
Cancel the call as shown in. At this time, the transmission from the calling station is stopped for a certain period of time T1, so that the call state of the called station is canceled as shown by e. After that, when there is a transmission instruction again as shown in a, the carrier is transmitted as shown in b and the line connection signal s 1 is also transmitted as shown in c.

FIG. 3 shows a state in which the called station starts transmission before the line holding of the calling station ends, stops transmission after an appropriate time, and the line holding of the called station is executed. It is a timing chart. a shows the state of the transmission instruction of the calling station, b shows the state of the transmission carrier of the calling station, c shows the transmission instruction of the called station, and d shows the state of the transmission carrier of the called station. There is. When the transmission instruction from the calling station is released during a call as shown in a, carrier transmission is stopped as shown in b and line holding is performed as described in FIG.
If the called station gives a transmission instruction as shown in c before the completion of the line holding, the carrier is transmitted as shown in d. The calling station detects the transmission from this called station and stops holding the line. After that, when the transmission instruction of the called station is canceled as shown in c, the called station holds the line by the same method as the line instruction in the calling station as described in FIG.

FIG. 4 shows that the calling station cancels the transmission after the call is made, and within a certain time T1 after the line holding ends, the called station issues a transmission instruction again before the transmission monitoring time ends and at a certain time. 6 is a timing chart in the case where the transmission instruction is canceled after a lapse of time and there is no transmission instruction as it is, and no transmission instruction from the called station is detected. a shows the state of the transmission instruction of the calling station, b shows the state of the transmission carrier of the calling station, and c
Indicates the state of the line connection signal transmitted by the calling station, and d indicates the call state of the calling station. s indicates a line connection signal. When there is a transmission instruction from the calling station as shown in a, the carrier is sent as shown in b, the line connection signal s is sent as shown in c, and the calling station makes a call as shown in d. It becomes a state. When the calling station does not detect the transmission from the called station, the line holding is executed, and before the line holding ends and the transmission monitoring time of the fixed time T1 ends, the transmission instruction is given again as shown in a. The carrier is transmitted as shown in b. When the transmission instruction is released after a certain time, the line holding is executed again, but the number of line holding repetitions thereafter is a set value N2 different from the first repetition number N1. In this embodiment, as an example, N2 =
The case where it is set to 2 is shown. Note that the relationship of N2 <N1 is set.

As described above, in the wireless device of this embodiment, when a call is made between the calling station and the called station, a predetermined time T2 is set after the first transmission is completed after the communication with the partner station is started. If the transmission from the partner station is not detected within this period, the line holding sound is transmitted for a fixed time T3 following this fixed time T2,
The line is held for (T2 + T3) time, and after this line holding operation is repeated a set number of times (N1), if no transmission is detected within a certain time T1 (T2 <T1), the call is terminated and the transmission is performed. It is designed to wait for instructions. Further, in the configuration, when a transmission instruction is issued during the line holding operation or during the transmission monitoring for the fixed time T1, the transmission operation is performed, and after the transmission operation is completed, the line holding operation is performed for the set number N2 (N2 <N1). After repeating
When the transmission cannot be detected within the fixed time T1, the call is terminated and the transmission instruction is waited. Furthermore, in any of the above-mentioned configurations, when transmission is detected during transmission monitoring for a fixed time T2 during line holding operation, the line holding operation is stopped and a reception state is set, and from the time when transmission cannot be detected. The call is terminated when transmission cannot be detected within a predetermined time T1.

Therefore, according to this embodiment, the following effects can be obtained. (1) T1, T2, T3 are set for a certain period of time and the number of times N1 and N2 of the line holding operation are set to hold the line between each station, and the line is held on the side of the transmission ending station, which is a troublesome line reconnection operation. Even if the call is not performed, the line disconnection can be prevented even if the no-call state is continued for several seconds, which is relatively longer than the conventional one. (2) The relation between the set number of times N1 and N2 of the line holding operation is N
By setting 2 <N1, the time interval between calls when connecting to the line is set to be long, and this interval is gradually shortened. Therefore, it is not necessary to be aware of disconnection of the line during a call, which is psychological to the user. No more burden. The fixed times T1, T2, T3 and the number of times N1, N2 of setting the line holding operation can be set to arbitrary values according to the purpose, application, etc.

[0021]

As described above, according to the present invention, when a call is made between a calling station and a called station, a fixed time T1, T2, T3 and a set number N1 of line holding operations are set. , N
2 is provided to hold the line between each station and to hold the line on the side of the transmission end station, so that the callless state can be continued for several seconds, which is relatively longer than before, without any troublesome line reconnection operation. Even if the line is disconnected, it can be prevented. Also,
The relationship between the set number of times N1 and N2 of the line holding operation is N2 <N
By setting it to 1, the call time interval at the time of line connection is set to be long, and this interval is gradually shortened, so it is not necessary to be aware of line disconnection during a call.
Eliminates a psychological burden on the user.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a wireless device of the present invention.

FIG. 2 is a timing chart illustrating an example of a line holding operation by the wireless device of this embodiment.

FIG. 3 is a timing chart explaining another example of the line holding operation by the wireless device of the present embodiment.

FIG. 4 is a timing chart for explaining another example of the line holding operation by the wireless device of this embodiment.

FIG. 5 is a schematic diagram illustrating an example of a call by a wireless device.

[Explanation of symbols]

 2 Modulation circuit 3 Transmitter 4 Ringing signal generator 5 Line holding sound generator 6 Transmission controller 6a, 6b Transmission instruction signal 7 T1 timer 7a T1 end signal 8 T2 timer 8a T2 end signal 9 T3 timer 9a T3 end signal 10 Counter 11 transmission / reception switching unit 12 reception unit 12a no carrier signal 13 demodulation circuit 15 call switch 17 ringing signal detection unit T1, T2, T3 timer set time N1, N2 set number of line holding operation

Claims (3)

[Claims] 1. A wireless device configured to terminate communication when transmission from a partner station cannot be detected within a predetermined time T1 when the calling station and the called station are receiving each other. When transmission from the partner station cannot be detected within a fixed time T2 (T2 <T1) after the first transmission is stopped after the call with the partner station, the fixed time T2 following the fixed time T2 is detected.
The function to transmit the line hold tone for 3 and hold the line for (T2 + T3) time, and after this line hold operation is repeated a set number of times (N1), when transmission cannot be detected within a certain time T1 Is a wireless device having a function of ending a call and waiting for a transmission instruction. 2. When a transmission instruction is issued during the line holding operation or during the transmission monitoring for a fixed time T1, the transmission operation is performed, and after the end of the transmission operation, the line holding operation is performed a set number N2 (N2 <N1). The radio device according to claim 1, further comprising a function of ending the call and waiting for a transmission instruction when transmission cannot be detected within a predetermined time T1 after repeating. 3. When a transmission is detected during transmission monitoring for a fixed time T2 during the line holding operation, the line holding operation is stopped to enter the receiving state, and within a fixed time T1 from the time when the transmission cannot be detected. The radio device according to claim 1 or 2, further comprising a function of ending a call when transmission cannot be detected.