JPH0374939A - Radio communication system - Google Patents

Abstract

PURPOSE:To display a change in the communication state onto a mobile station by providing a comparison means comparing the reception level with a preceding reception level and a display means displaying the communication state based on a comparison output from the comparison means to a mobile station in a radio communication system having the mobile station. CONSTITUTION:A CPU 4 compares a level of a signal representing a carrier level with a level of a reference signal stored in advance in a ROM 7. Simultaneously the CPU 4 compares the carrier level of a signal with a preceding signal representing the carrier level written in a RAM 6. Then the CPU 4 decides the communication state of a mobile station from two comparison outputs and issues the information to a display section 5. Then the change of the communication state or the like is displayed on the display section 5 in addition to the propriety of the communication. That is, a mobile station has only to move in a direction capable of getting a better communication state based on the display of the display section 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wireless communication system having a mobile station.

[Prior Art] FIG. 3 shows the configuration of the main parts of a conventional line communication system.

In the figure, 1 is a transmitting section of a fixed station, and 2 is a receiving section of a mobile station. When the radio waves transmitted from the transmitter 1 of the fixed station are supplied to the receiver 2 of the mobile station, the receiver 4N section 2 outputs a signal indicating the carrier level.

This signal indicating the carrier level is supplied to the level comparator 10 and compared with a base 4 signal whose level has been set in advance.

The comparison output from this level comparing section 10 is supplied to a display section 5 composed of a liquid crystal display element, a light emitting diode display element, etc. The display unit 5 displays the communication status, for example, whether communication is possible or not, based on the comparison output.

[Invention tries to solve! ! By the way, according to the example in FIG. 3, the career level can only be determined in real time. Therefore, even if at a certain point the carrier level increases and the communication condition tends to improve, and at a certain point the carrier level decreases and the communication condition tends to deteriorate, as long as the carrier level remains the same, , the display on the display section 5 will be the same.

In other words, since changes in the communication status are not displayed, there is a risk of accidentally moving from an area where communication is possible to an area where communication is not possible and interrupting communication. It is difficult to move to other areas.

Therefore, it is an object of the present invention to provide a wireless communication system in which changes in communication status are displayed on mobile stations.

[Means for Solving the Problems] The present invention is a wireless communication system having a mobile station, and the mobile station includes a comparison means for comparing a reception level with a previous reception level, and a comparison output from the comparison means. A display means for displaying the communication status based on the communication status is provided.

[Operation] In the above configuration, the comparison means compares the reception level with the previous reception level. In other words, the comparison means detects a change in the reception level. Therefore, changes in the communication status can be displayed on the display means.

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, parts corresponding to those in FIG. 3 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In the figure, a signal indicating a carrier level output from a receiving section 2 of a mobile station is supplied to an A/D converter 3,
The signal is converted into a digital signal by a conversion request signal supplied from the PU 4 and then supplied to the CPU 4.

The CPU 4 compares the level of the signal indicating the carrier level with a reference signal stored in the ROM 7 in advance. At the same time, in the CPU 4, the signal indicating the carrier level is
The level is compared with the signal indicating the previous carrier level written in AM(3).

Then, the CPU 4 determines the communication state of the mobile station from these two comparison outputs, and the information is supplied to the display section 5.

The display section 5 displays, for example, 11! indicating whether communication is possible or not.
! Changes in communication status, etc. are displayed.

Further, thereafter, the signal indicating the carrier level before being written into the RAM 6 is updated under the control of the CPU 4, and is prepared for the next comparison.

According to this example, changes in the communication status are displayed on the display unit 5, so that the user can avoid interrupting communication by moving from an area where communication is possible to an area where communication is not possible. can do. Furthermore, it is possible to easily move from an area where communication is not possible to an area where communication is possible. In other words, based on the display on the display unit 5, it is sufficient to move in a direction that improves the communication state.

Next, FIG. 2 is a block diagram showing another embodiment of the present invention. This example is an example configured without using ROM or RAM. In FIG. 2, parts corresponding to those in FIGS. 1 and 3 are designated by the same reference numerals.

In the figure, a signal indicating a carrier level output from a receiving section 2 of a mobile station is supplied to an A/D converter 3,
After being converted into a digital signal by a conversion request signal supplied from the PU 4, the signal is supplied to the digital comparator 9. Further, the output signal of the A/D converter 3 is supplied to a digital comparator 9 via a latch circuit 8.

In the digital comparator 9, the signal indicating the carrier level supplied from the A/D converter 3 is compared in level with the signal indicating the carrier level before being supplied from the latch circuit 8, and the comparison output is supplied to the CPU 4.

Further, a signal indicating the carrier level outputted from the receiving section 2 is supplied to a level comparing section 1o and compared with a reference signal whose level is set in advance. And this level comparison part 1
The comparison output from o is supplied to CPU4.

The CPU 4 determines the communication state of the mobile station from the two comparison outputs supplied from the digital comparison section 9 and the level comparison section 10, and supplies the information to the display section 5. Similarly to the example shown in FIG. 1, the display unit 5 displays information such as whether or not communication is possible, as well as changes in the communication status.

Further, thereafter, the signal indicating the previous carrier level, which is latched at the latch circuit N8, is updated under the control of the CPU 4 and is prepared for the next comparison.

In this way, also in this example, changes in the communication status are displayed on the display unit 5, so that the same effects as in the example in FIG. 1 can be obtained.

[Effects of the Invention] As explained above, according to the present invention, changes in the communication status are displayed on the display unit, so that the user cannot communicate by accidentally moving from an area where communication is possible to an area where communication is not possible. Interruptions can be avoided in a good manner. Furthermore, it is possible to easily move from an area where communication is not possible to an area where communication is possible.

! ・Display section ◆RAM ・ROM ・Latch circuit ・Digital comparison section ・Level comparison section

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram of a conventional example.

Claims (1)

[Claims] (1) In a wireless communication system having a mobile station, the mobile station has a comparison means for comparing the reception level with the previous reception level, and a display means for displaying the communication status based on the comparison output from the comparison means. A wireless communication system characterized by being provided with.