JPH0547146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wireless terminal in a wireless system that accommodates a large number of wireless terminals and has a large number of zones.

(Prior Art) In a cellular wireless communication system that accommodates a large number of wireless terminals and provides services to a wide area, it is extremely important to know where the terminal is located and to call the terminal. As a method for this, a method of calling all at once from the base station side has been commonly used. However, in the simultaneous paging method, as the service area expands, the number of zones to be called at once increases, the amount of traffic for paging increases, and this puts pressure on the system. On the other hand, it is possible to reduce call traffic by registering only the terminals that are turned on in the system and not making calls to unregistered terminals. Since wireless terminals generally operate on batteries, users are likely to turn off the power to the terminals when they are not in use. In this sense, this method is a powerful method. System C, Germany's new car phone system, employs this type of system. This method
IEEE periodical COMMUNICATIONS
From page 22 of MAGAZINE (published February 1986)
Detailed information is provided on page 29.

(Problem to be solved by the invention) However, in the conventional registration method described above, when the terminal is powered on, it is possible to transmit a registration packet, but when the terminal is powered off, it cannot transmit anything, so the base station turns off the power. cannot be recognized immediately. Therefore, the base station periodically transmits a transmission request signal for confirmation, and when there is no response, it is determined that the power has been turned off. However, this method has the disadvantage that the amount of traffic increases because the checks are performed periodically.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a wireless terminal in which a base station can reliably determine the power-on state of the terminal.

(Means for Solving the Problems) Means provided by the present invention to solve the above-mentioned problems is a power line that is used in a wireless system that accommodates a large number of terminals and that leads power from the main power source to a transmitter/receiver. A wireless terminal in which a line opening/closing means is inserted, the line opening/closing means having a bucket generating means that starts transmitting a power-off bucket when the railway opening/closing means receives an opening operation by a user and finishes the transmission within a predetermined time. , the line opening/closing means comprises a switch with a timer, and the timer switch opens the power line after the predetermined time has elapsed from the opening operation.

(Function) If the power supply to the transceiver stops immediately after opening the power switch (the above-mentioned line opening/closing means), it is impossible to notify the base station of this fact. Therefore, in the present invention, even after the user opens the power switch, the timer continues to supply power for a certain period of time, and during that time, a power-off message is sent to the base station to notify the base station that the power will be turned off. Only after that will the power supply be actually stopped. In this way, the base station can reliably recognize whether the terminal is powered on or off.

(Example) Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. When the user finishes using the terminal and presses button 100 (i.e.
When the track opening/closing means is opened/closed) switch 10
The bucket generating circuit 30 starts generating a power-off bucket according to the signal from the power-off bucket. timer 2 at the same time
1 is activated and starts timing. The timer 21 sends a power-off signal to the power switch 22 after a certain period of time has elapsed since activation. During this time, the bucket generator circuit 30
Then, a power-off bucket is generated and transmitted from the transceiver 40. The power switch 22 turns off the power to the device in response to a signal from the timer 21. timer 2
1 and power switch 22, switch 20 with timer
It consists of

By doing this, the wireless terminal can notify the base station of the power-off operation, so the wireless base station can correctly recognize whether the terminal is powered on. Of course, in order for the base station to correctly recognize the status of the terminal, it also needs a function to send a registration packet when the power is turned on, and a function to re-register when the terminal moves and enters another zone. Since this is not a feature of the present invention and any method may be used, it is not described in this embodiment. In addition, the original functions of wireless terminals,
In other words, the function of transmitting and receiving voice and data is not a feature of the present invention, and any function may be used, so it is not described in this embodiment.

The timer switch 20 can be constructed in the same manner as a commercially available household timer. Additionally, the bucket generator circuit 30 can be used with a microprocessor that is normally used for generating control signals. In fact, a car phone or an MCA radio device has a built-in microprocessor for generating control signals, and by using this, the bucket generating circuit 30 can be realized without adding any hardware. The format of the power-off bucket may be any format as long as it is agreed upon between the base station and the terminal.

(Effects of the Invention) As described above in detail, according to the present invention, it is possible to provide a wireless terminal that allows a base station to correctly recognize a power-off state. Therefore, there is no need to periodically send a signal from the base station to check the status of the terminal, which simplifies control and reduces the amount of traffic. Such terminals are particularly effective in mobile radio communication systems where the operating rate per terminal is low, the number of terminals is extremely large, and the service area spans many zones.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, in which reference numeral 20 indicates a switch with a timer, and reference numeral 30 indicates a bucket generating means.

Claims (1)

[Claims] 1. In a wireless terminal used in a wireless system accommodating a large number of terminals, in which a line opening/closing means is inserted into a power line that leads power from the main power source to a transmitter/receiver, the line opening/closing means is subjected to an opening operation by the user. The line opening/closing means includes a switch with a timer, and the switch with a timer starts transmitting a power-off signal at the specified time and finishes the transmission within a predetermined time. A wireless terminal characterized by the following features: