JPS63306722A - Mobile equipment - Google Patents

Abstract

PURPOSE:To facilitate the identification of a mobile equipment having a fault and to ensure the safety of the system by sending a mobile equipment identification signal while a predetermined radio channel is selected when a carrier output is detected even when an output is shut off. CONSTITUTION:If a fault takes place in the transmission system of a mobile equipment main body 1 and continuous transmission state is reached regardless of the transmission of a signal turning off a carrier from a control section 13, a transmission output detection circuit 18 detects the output of a carrier. The control section 13 receives a detection signal from the circuit 18 to recognize the continuous transmission state, then the section 13 sends a channel switching signal to switch the channel to a predetermined channel (fault channel) and sends a mobile station number of its own station at a prescribed period. It is possible for a base station to identify a faulty mobile equipment to monitor the channel. Thus, the disturbance onto the control channel used in common by each mobile equipment is prevented and the safety of the system is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mobile radio system, a mobile device such as a mobile phone that communicates with a base station by sharing a control channel and a communication channel.

(Prior art) As a conventional communication system of this type, the Journal of the Institute of Electronics and Communication Engineers 1
．． Main 4 (1) (January 1981) p7-29, The Bell System Technical Journal (THE BE
LL SYSTEM TECHNICAL JO
There are those disclosed in LIRN 8L), He, Giant [' Giant (1) (January 1979) 943-68, etc.

FIG. 2 is a block diagram showing the configuration of a mobile device used in such a system. As shown in the figure, the mobile device includes a main body 1, an antenna 2, a telephone 3, a battery 4, and the like. The mobile device body 1 includes a transmitting/receiving duplexer 11, a receiving section 12, a control section 13, a synthesizer section 14, a transmitting section 15, and a power amplifying section 1.
6. It is composed of a power supply section 17.

Normally, the mobile device sends a channel signal to the synthesizer unit 14 by the control unit 13, and sends a channel signal to the incoming call control channel (hereinafter referred to as P
-ch), and receives the originating control channel (hereinafter abbreviated as A-ch) number information and called mobile device information.

In the case of an incoming call from a mobile device, if the mobile device number of the own station is included in the P-Ch information, the call is switched to A-ch in P-ch,
Make a response. Then, from the base station, the communication channel (5 below)
-ch), and after switching to 5-ch, communication is performed.

In the case of a mobile device call, switch to A-ch in the P-ch information, receive the 5-ch designation from the base station, switch to 5-ch, send destination information to the base station, and start communication. conduct.

In such systems, the A-ch is shared by all mobile devices within its service area, so the base station usually transmits idle signal signals when the mobile device can transmit to the base station on the A-ch. The mobile terminal is to transmit only when the line is idle.

(Problem to be solved by the invention) However, in the conventional mobile equipment used in the above-mentioned system, if a failure occurs in the transmission system of the mobile equipment and the carrier waves are continuously transmitted, the system will be seriously affected. There is a problem. In addition, in the automobile telephone system (AMPS) shown in the foreign literature mentioned above, P-ch and A-ch are 5ET.
Since the same channel is used as the UP channel, the impact when the above failure occurs is greater.

In addition, when such a problem occurs with conventional mobile devices, it becomes difficult to identify the mobile device, and it is necessary to locate the mobile device from various locations using means such as direction finding, and then track it using vehicles, etc. There is a problem.

An object of the present invention is to provide a mobile device that can solve the problem of the influence on the system due to a failure in the transmission system of the mobile device described above and ensure the safety of the system.

(Means for Solving the Problems) The present invention is directed to a mobile device used in a system in which a plurality of mobile devices commonly use a control channel and a communication channel to communicate with a base station, and is directed to a mobile device that is used in a system in which a plurality of mobile devices commonly use a control channel and a communication channel to communicate with a base station. In order to solve the problem, a first means for detecting whether or not a carrier wave is being output is provided, and a second means for monitoring the detection result of the first means when transmission is turned off. However, if the first means detects the output of the carrier wave, it switches to a predetermined radio channel and transmits a mobile device identification signal.

(Operation) In the present invention, when a failure occurs in the mobile device and the carrier wave is continuously transmitted, the first means detects that the carrier wave is being output. The second means learns by monitoring the detection results of the first means that there is a carrier output even though the carrier should be off. As a result, the second means switches to a predetermined radio channel for failure and outputs the mobile device identification number of its own station. The base station monitors the channel and identifies the mobile device in which the problem has occurred. Therefore, interference with the control channel can be prevented, and a mobile device in which a problem has occurred can be quickly identified, thus solving the problems of the prior art.

(Example) Examples of the present invention will be described in detail below.

FIG. 1 is a block diagram showing the configuration of a mobile device according to an embodiment of the present invention. In this figure, the same elements as in FIG. 2 are given the same reference numerals. In this embodiment, a transmission output detection circuit 18 is provided to detect whether or not a carrier wave is output, and the control unit 13 always checks the detection output of the transmission output detection circuit 18 with the carrier wave turned off. , confirm that the carrier wave output is turned off.

Next, we will discuss the operation. When the mobile device of this embodiment is operating normally, operations are performed as described in the description of the prior art, except for carrier wave output detection of the transmission output detection circuit 18 and monitoring of the detection output of the transmission output detection circuit 18 by the control unit 13. works.

On the other hand, in the mobile device of this embodiment, even if a signal to turn off the carrier wave is sent from the control unit 13 due to a failure in the transmission system, such as a short circuit of the carrier wave on/off signal to the power source, a failure of the carrier wave switch transistor, etc. Regardless, it is assumed that continuous transmission occurs due to the above failure. In this case, the transmission output detection circuit 18 detects that the carrier wave is being output.

By monitoring the detection output of the transmission output detection circuit 18, the control unit 13 learns that the carrier wave is being output even though the carrier wave is turned off. Then, the control section 13 sends a channel switching signal to the synthesizer section 14, switches to a predetermined communication channel (failure channel), and sends out the mobile device number of its own station at regular intervals. By monitoring this channel, the base station can identify a mobile device in which a problem has occurred.

In general, such failures of mobile devices do not necessarily occur continuously, but even if they happen to occur due to conditions such as temperature, according to this embodiment, it is possible to easily identify the mobile device in which the failure has occurred. It becomes easier.

Furthermore, since a certain determined failure channel can be assigned as a communication channel when the line usage rate becomes high, system efficiency will not be reduced.

(Effects of the Invention) As described above in detail, according to the present invention, it is possible to prevent interference with the control channel commonly used by each mobile device, and it is possible to improve the safety of the system. Also,
It becomes easy to identify a mobile device in which a continuous transmission failure has occurred, and fault detection and serviceability are improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a mobile device according to the present invention;
FIG. 2 is a block diagram showing the configuration of a conventional mobile device. 1...Mobile device main body 2...Antenna 3...Telephone 4...Battery 11-...Transmission/reception duplexer 12
--Reception section 13--Control section 14--Synthesizer section 15--Transmission section 16--Power amplification section 17--
Power supply section 1B-... Transmission output detection circuit

Claims (1)

[Claims] In a mobile device used in a system in which a plurality of mobile devices share a control channel and a communication channel to communicate with a base station, there is provided a first method for detecting whether or not a carrier wave is output. means, and a second means for monitoring the detection result of the first means when transmission is turned off.
A mobile device characterized in that the first means detects the output of the carrier wave even though the carrier wave is turned off, switches to a predetermined radio channel and transmits a mobile device identification signal. .