JPH10209885A - Wireless device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the head part disconnection of talk or the temporary interruption of talk at the time of zone switching by providing a delay circuit in the transmission signal line of a radio equipment and delaying the transmission signal until a speech path is sufficiently constituted between radio equipment. SOLUTION: An activation signal is simultaneously inputted to a transmission signal terminal 6 and a transmission activation terminal 7. At that time, a controlling part 5 previously sets a delay time longer than at least the rising time of the transmitter of a radio equipment 1 in a delay circuit 2, and controls a delay circuit path switch 3 so that the delay circuit 2 can be connected, and the transmission signal is delayed and transmitted. At the time of operating base station zone switching during speech, the control part 5 controls the delay circuit path switch 3 so that the delay circuit 2 in which a time for operating at least switching is previously set can be connected with a transmission voice signal line, and operates channel switching control for the radio part 1, and the transmission is delayed and transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio device for providing a delay circuit in a transmission signal line of a radio device so that transmission information can be reliably transmitted.

[0002]

2. Description of the Related Art A conventional radio device transmits an audio signal as it is when transmission is started. Therefore, when the user activates the press of the press talk type radio,
Since it takes a certain period of time to connect to the other party's radio and make a call, if the user speaks immediately after starting the press, there is a disadvantage that the head of the call is not received by the other party's radio. In a wireless communication system that performs communication between a mobile station and a ground station, communication between the mobile station and the ground station is performed via a base station. Each base station defines a service area (hereinafter referred to as a zone) in advance and forms a communication line. Here, in the communication between ground stations composed of a plurality of base stations, it is necessary to switch the base station as the mobile station moves during communication. For this switching, a switching signal is transmitted to automatically perform tracking exchange. Therefore, when the zone switching data is transmitted during a call, for example, when the zone is switched, the call is temporarily disconnected, the other party's wireless device is interrupted momentarily, and there is a disadvantage that the call cannot be received.

[0003]

As described above, the conventional wireless device has a drawback that when the user starts the press and speaks immediately, the head of the call is not received by the other wireless device. . Also, in a wireless communication system in which communication is performed between a mobile station and a ground station, if zone switching data is transmitted during zone switching during a call, the call is disconnected once, the other party's wireless device is interrupted momentarily, and the disadvantage that reception is not possible. There was.

[0004]

According to the present invention, in order to eliminate the above-mentioned drawbacks, a delay circuit is provided in a transmission signal line of a radio apparatus, and a transmission signal is transmitted until a communication path is sufficiently established between radio apparatuses. This is to delay the transmission so that the contents of the transmission can be reliably transmitted. In addition, when the transmission signal is interrupted to transmit zone switching data and the like during a call, control is performed such that the transmission signal corresponding to the data length interrupted by the delay circuit is delayed, and Is transmitted reliably.

[0005] As a result, it is possible to reliably transmit the contents of a call without the user of the wireless device having to worry about whether or not a call line has been established. In addition, when performing channel switching to perform zone switching during a call, the above-mentioned delay circuit is used to delay the transmission signal until a sufficient communication path is established between the radios, thereby ensuring that the contents of the call are interrupted. I can tell you.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing the overall configuration of a wireless device according to one embodiment of the present invention. FIG. 2 is a schematic diagram of a wireless communication system including a mobile station and a ground station to which the wireless device of the present invention is applied. In the wireless device shown in FIG. 1, a transmission signal is input from a transmission terminal 6 and supplied to a delay circuit 2, a delay path switch 3, and a transmission signal level detection circuit 4. Outputs of the delay circuit 2 and the delay path switch 3 are connected to the radio unit 1. On the other hand, the control unit 5 controls the delay circuit path switch 3 and the transmission unit 1 based on the output of the transmission signal detection unit 4 and the transmission activation information from the transmission activation terminal 7.

The operation will be described below. When a user of the wireless device makes a call, a start signal is input to the transmission start terminal 7 almost simultaneously with the input of a signal to the transmission signal terminal 6. At this time, the control unit 5 outputs a transmission start to the wireless unit 1. However, since the communication path of the wireless device used by the other party is not configured, a delay time longer than at least the rise time of the transmitter of the wireless unit 1 is set in the delay circuit 2 in advance, and the delay circuit Then, the delay circuit path switch 3 is controlled so as to connect the transmission signal 2 and the transmission signal is delayed and transmitted. Also, when it is detected that the level value detected by the transmission signal level detection circuit 4 during transmission is lower than a predetermined level by the delay time of the delay circuit 2 or more, and there is no transmission signal,
The control unit 5 controls the delay circuit path switch to conduct so as to return to a normal call. Furthermore, if the transmission for more than the delay time is continued during the call, even if the signal from the transmission start terminal 7 disappears, the control unit continues to operate the radio unit 1 for the delay time.
To delay transmission start.

When data is transmitted during a call, the data is transmitted to the data signal input terminal 8 almost simultaneously.
A start signal is input to the data signal input terminal 9. At this time, the data signal control unit 10 performs data transmission to the control unit 5 and sets a transmission signal disconnection time. In addition, the control unit 5 controls the delay circuit path switch 3 so as to connect the delay circuit 2, and delays the transmission signal by the set delay time.

Next, with reference to FIG. 2, an operation when zone switching occurs during a call will be described. In the figure, when the mobile station 20 moves to the zone B12 while performing a call with the moving mobile station 20 in the zone A11 from the ground station 19 via the exchange 18 and the base station 17, the following is performed. Zone switching control is performed. When performing base station zone switching during a call, the wireless device of the mobile station 20 receives the zone information transmitted from the base station, detects the information in the data signal control unit 10 in FIG. Control to switch channels. The control unit 5 controls the delay circuit path switch 3 so as to connect the delay circuit 2 in which at least the switching time is set in advance to the transmission audio signal line, performs channel switching control on the radio unit, and performs transmission. Speak signal is delayed and transmitted.

[0010]

As described above, according to the present invention, a delay circuit is inserted into a transmission signal line when necessary to control the start of transmission. Can be transmitted. Also, even when data transmission is performed during a call, the transmission signal is controlled to be delayed by the delay circuit during the data transmission, so that the data transmission does not interrupt the call and the contents of the call are reliably transmitted to the partner station. be able to. Furthermore, even if zone switching occurs during a call, the transmission signal is delayed by the delay circuit during the zone switching time, so that the contents of the call can be reliably transmitted to the partner station.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention.

FIG. 2 is a schematic diagram of a wireless communication system including a mobile station and a ground station.

[Explanation of symbols]

1: wireless unit, 2: delay circuit, 3:
Delay circuit path switch, 4: transmission signal level detection circuit, 5: control unit, 6: transmission signal input terminal, 7: transmission start input terminal, 8: data transmission start input terminal, 9: data signal input terminal,
10: data signal control unit, 11: zone A,
12: Zone B, 13: Zone C,
14: Zone D, 15: Zone E,
16: Zone F, 17: base station,
18: exchange, 19: ground station, 2
0: mobile station.

Claims (3)

[Claims] 1. A wireless device having at least a transmission unit, a delay circuit having a transmission audio signal line of the transmission unit having a delay time longer than at least a transmitter rise time,
A switch for bypassing the delay circuit; a control unit for controlling the switch; and a transmission signal level detection circuit.
When the audio signal of a predetermined level is detected before the start of transmission or before the transmitter rises, the control unit controls the transmission audio signal line to insert the delay circuit into the transmission audio signal line to delay the transmission of the audio signal. A wireless device characterized in that: 2. The wireless device according to claim 1, wherein the control unit bypasses the delay circuit when detecting a period longer than the delay time of the delay circuit and a period of no sound during transmission start. If no voice signal is detected for more than the delay time of the delay circuit during activation of transmission, control is performed so as to extend transmission activation by the delay time after transmission activation is stopped. Characteristic wireless device. 3. The wireless device according to claim 1, wherein, when transmitting data information for a short time during transmission activation and during transmission activation, data transmission activation information is supplied to the control unit. A wireless device that controls the delay circuit to be inserted into the transmission audio signal line.