JPH05292016A - Radio telephone system - Google Patents

Abstract

PURPOSE:To actively select a speech system either analog speech or digital speech from a radio telephone set side. CONSTITUTION:A radio telephone set 2 capable of responding to both analog speech and the digital speech is equipped with means 23 and 24 which issue an analog speech request signal. A radio base station 1 is equipped with a means 13 which judges the arrival of the analog speech request signal, and a means 14 which sets a digital speech system when no analog speech request signal arrives and sets an analog speech system when it arrives based on the judgement of the means 13.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is used in a wireless telephone system. In particular, it relates to means for selecting analog or digital calls.

[0002]

2. Description of the Related Art As shown in FIG. 3, selection of a call method of analog call or digital call in a radio telephone system in which a conventional analog call and a digital call in which voice is converted into a digital signal are mixed is performed. The wireless telephone base station side determines the type of the wireless telephone (terminal) in step S201, and sets the analog telephone call system in step S202 for the wireless telephone that can only perform analog telephone calls, and enables both analog telephone calls and digital telephone calls. The wireless telephone is controlled to set the digital communication system in step S203.

[0003]

As described above, in the conventional example, the radiotelephone base station side determines the type of the radiotelephone and sets the call system, and the radiotelephone side calls both analog calls and digital calls. Even if it can support the system, it is not possible to specify the call method from the wireless phone, so specify the analog call method with good call quality from the wireless phone side, or specify the digital call method with the confidential talk function to prevent wiretapping. There was a drawback that I could not use it.

The present invention eliminates such drawbacks, and provides a radiotelephone system having means for allowing the radiotelephone side to actively select either an analog call or a digital call. With the goal.

[0005]

SUMMARY OF THE INVENTION The present invention is a radio base station including a switching means for selecting either in-station analog call means or in-station digital call means in accordance with given call system selection information, and this radio base station. In a radiotelephone system connected to a station and provided with a radiotelephone including an in-flight analog call means and an in-flight digital call means, the radiotelephone is a communication between either the in-flight analog call means or the on-board digital call means It is characterized by including a selecting means for selecting a means and a selection information transmitting means for transmitting information indicating the calling means selected by the selecting means to the above-mentioned radio base station as the calling method selection information.

Here, the call method selection information is a request signal indicating a request to execute a call between the wireless base station and the wireless telephone by an analog call, and the wireless base station receives the request signal. The switching means includes a judging means for judging presence / absence, and the switching means selects the in-station analog call means when the judging means judges that there is a request signal, and selects the in-station digital call means when judging that there is no request signal. It may be a means.

[0007]

When the radio base station receives the call mode selection information from the radio telephone capable of supporting both analog and digital call modes, the radio base station determines the information indicating the presence or absence of the analog call request signal, and the analog determination is made by this determination. If there is no call request signal, set the digital call system,
If there is, an analog call method is set and a call is made with this wireless telephone.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIG. 1, in-station analog call means 1 is provided in accordance with given call method selection information.
1 or an in-station digital call means 12 and a radio base station 1 including a switching means 14, and a radio telephone 2 connected to the radio base station 1 and including an on-board analog call means 21 and an on-board digital call means 22. Further, as a feature of the present invention, the wireless telephone 2 has a selecting means 23 for selecting one of the in-flight analog call means 21 and the in-flight digital call means 22 of its own device, and this selection means. It includes a selection information transmitting means 24 for transmitting information indicating the calling means selected by the means 23 to the wireless base station 1 as the calling method selection information. here,
The call method selection information is a request signal indicating a request to execute a call between the wireless base station 1 and the wireless telephone 2 by an analog call, and the wireless base station 1 determines the presence / absence of this request signal. The switching means 14 is a means for selecting the in-station analog call means 11 when the determination means 13 determines the presence of the request signal and selecting the in-station digital call means 12 when the determination means 13 determines that there is no request signal.

Next, the operation of this embodiment will be described with reference to FIGS.
Will be used to explain. When a request signal set by a dedicated button or the like in the wireless telephone 2 arrives at the determination means 13 of the wireless base station 1, the determination means 13 determines the type of the wireless telephone (step S101), and the wireless capable of analog communication only. The analog communication system is set for the telephone (step S103), and the presence or absence of the request signal is judged for the wireless telephone capable of supporting both the analog communication and the digital communication (step S102). If so, the digital communication system is set (step S104), and if there is, the analog communication system is set (step S103).

[0011]

As described above, according to the present invention, since an analog communication request signal is transmitted from the wireless telephone and the request is detected at the wireless telephone base station side to set the communication system, the wireless telephone side is activated. This has the effect of enabling either analog call with good call quality or digital call having a confidential communication function by selective selection.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radio base station 2 Radio telephone 11 In-station analog call means 12 In-station digital call means 13 Judgment means 14 Switching means 21 In-flight analog call means 22 In-flight digital call means 23 Selection means 24 Selection information transmission means

Claims (2)

[Claims] 1. A radio base station including switching means for selecting either in-station analog call means or in-station digital call means in accordance with given call method selection information, and an in-flight analog call connected to this radio base station. Means and a radiotelephone including an on-board digital call means, the radiotelephone includes a selecting means for selecting one of the on-board analog call means and the on-board digital call means, and a selecting means for selecting the communication means. A radiotelephone system characterized by including selection information transmitting means for transmitting information indicating the call means selected by the selecting means to the radio base station as call method selection information. 2. The call method selection information is a request signal indicating a request to execute a call between the wireless base station and the wireless telephone by an analog call, and the wireless base station determines whether or not the request signal is present. Means for selecting whether the request signal is present, the switching means selects the in-station analog call means, and when it determines that there is no request signal, the switching means selects the in-station digital call means The wireless telephone system according to claim 1, wherein