JPH0336345B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides information on current location to a mobile station moving between a plurality of wireless zones that are arranged so that the frequencies of control channels and communication channels of adjacent wireless zones do not interfere with each other. This invention relates to a location display device that automatically indicates the wireless zone of the country.

Conventional configuration and its problems A mobile station that operates between multiple wireless zones that are arranged so that the frequencies of control channels and communication channels of adjacent wireless zones do not interfere connects to the wireless station at the destination. It is necessary to always receive the control channel of each wireless station in good condition. When the mobile station reaches a certain point, it must switch from the zone to which that point belongs to the base station of the zone it is moving to, and at the point it moves to, it must perform an operation to switch from the zone to which that point belongs to the base station of the next zone it will move to. be. If you forget this, even if you have the ability to receive wide area services, you will not be able to make calls via the base station or from your mobile station.

Conventionally, such switching of wireless channels for each zone had to be carried out at the individual responsibility of the user, depending on his or her experience. Therefore, even if you know that it is necessary to switch wireless zones, if the service area is complicated or the driving location is unclear, information that can be used to determine which wireless zone to switch to for optimal communication. There was a drawback that I could not get it. In addition, when changing the wireless zone, when a call is made from a mobile station, a search is made to switch to a channel that can be notified even if it takes some time, but in the standby state, it may be left as is without switching depending on the traffic situation, so it is important. There were cases where communication could not be made, and countermeasures were requested.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks and provides a number of radio groups that can be used by a mobile station when it first powers on its radio or when it leaves the coverage area of a radio zone during use. Automatically searches control channels and displays wireless zones where calls can be made,
Or in addition to this, issue a warning and give a warning,
It is an object of the present invention to provide a location display device that can reliably perform channel switching.

Structure of the Invention In order to achieve the above object, the present invention provides wireless communication to a wide area mobile station that moves and communicates between a plurality of wireless zones arranged so that control channels and communication channels of adjacent wireless zones do not interfere with each other. a receiver, a radio channel switching unit for switching channels of the radio receiver, and a channel for storing a control channel of a radio zone in which a mobile station moves and giving control channel information to the radio channel switching unit to switch channels. A switching memory section, a reception level detection section that sequentially scans the control channels of radio zones accessible by the mobile station and detects the reception level, and a reception level determined by the power ON information and the reception level from the reception level detection section. a timer that is activated by one or both of the information indicating that the level has fallen below the specified value and drives the wireless channel switching unit; a reception level memory unit that receives reception level information from the reception level detection unit; a wireless zone display drive unit that operates based on information from the level memory unit; a wireless zone display unit that displays wireless zones accessible to the mobile station; A broadband mobile station that moves and communicates between a plurality of wireless zones arranged so that control channels and communication channels of adjacent wireless zones do not interfere. , a wireless receiver, a wireless channel switching unit for switching channels of the wireless receiver, storing a control channel of a wireless zone to which a mobile station moves, and supplying control channel information to the wireless channel switching unit to switch the channel. a channel switching memory section of the mobile station, a reception level detection section that sequentially scans the control channels of wireless zones accessible by the mobile station and detects the reception level, and a reception level detection section that sequentially scans the control channels of the wireless zone accessible to the mobile station and detects the reception level from the power ON information and the reception level detection section. a timer that is activated by one or both of information indicating that the reception level has fallen below a reception limit value and drives the wireless channel switching section; and a reception level memory section that receives reception level information from the reception level detection section. , a wireless zone display drive unit that operates based on information from the reception level memory unit, a wireless zone display unit that displays a wireless zone accessible to the mobile station, and a control channel for the wireless receiver, and a line connection is established. and an alarm unit that compares the information in the reception level memory unit and the control channel setting information of the control unit, and is activated to issue an audible alarm when the two values differ. It is.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 is a wireless zone layout diagram, with wireless zone a as the center and surrounding areas b, c...h.
Wireless zones are arranged, and each wireless zone a...h
For each wireless zone a...h,
It is assumed that multiple wireless systems based on 16 channels are deployed. The channel frequencies of adjacent wireless zones a...h are different to avoid interference, and the control channels for connection of calls are also different. Therefore, when mobile station M moves, it is necessary to switch to the control channel of each wireless zone a...h, and when mobile station M makes a call, it must use the system code of its own home zone and the area where the call is being made. It is necessary to notify the base station of the system code of the base station and the system code of the destination.

Assume now that a mobile station M whose home zone is zone B is in zone a, and as shown in FIG. 2, the control channel number of each wireless zone a, b, ... h is set to no. 001, No.017, No.033, ...No.113, and the reception input of each control channel is 25dB,
Assume that 15dB, 11dB...-5dB.

In the present invention, when the power of the radio is turned on, or when the reception input of the control channel decreases and becomes below the communication limit value, for example, a threshold, the control channels of the radio zone that can be used by this mobile station M are sequentially changed. Switch and import the reception level into memory,
The system displays the names and numbers of communicable wireless zones and allows the user to switch between them.An example of this will be explained with reference to FIG.

In FIG. 3, 1 is the antenna of mobile station M,
Usually shared by transmitter and receiver. 2 is a radio receiver, and 3 is a radio channel switch, which together with the radio receiver 2 and a transmitter (not shown) form a multi-channel automatic switching radio device. Reference numeral 4 denotes a receiving input level detection section which converts the receiving input level into a dB linear DC voltage or digital code and outputs it to the receiving level memory section 7 and the timer 5. The timer 5 operates as follows depending on the power-on or the level of the received input. In other words, when the received input level is below the communication limit value or when the power is turned on, a predetermined signal is output at a short timing, and when the reception level is above the communication limit value but still quite low, it is output at a considerably long timing. , and then outputs a predetermined signal, and when the received input is sufficiently larger than the communication limit value, the timing is set to infinity and the predetermined signal is not output. and,
When the above-mentioned predetermined signal obtained here is applied to the channel switching memory section, the channel switching memory section selects a wireless zone a that can be used by the mobile station M...
...h control channel information is read out, and thereby the wireless channel switch starts channel switching. This channel information is transferred from the fixed memory element (ROM) provided in the channel switching memory section 6 to the variable memory element (RAM) provided in the wireless channel switch 3, and then the channel switching memory section 6 is released. You can do it like this. The level information of the reception input for control channel switching is taken into the reception level memory section 7 and evaluated by setting a criterion. Figures 6 to 9 show
This shows a case where the level is evaluated at four points (judgment points): 0 dB, 6 db, 12 dB, and 20 dB. Here, 0dB is the communication limit value of this communication system, and this value is
It changes depending on the sensitivity, external noise, etc., so it is reasonable to change it as necessary.
Here, the description will be made assuming that it is fixed. As a result, the received input is evaluated at each of the points, and evaluation values 4, 3, 2, and 1 are obtained. The reception input memory unit 7 outputs this information to the wireless zone display drive unit 8, and the wireless zone display drive unit 8 lights up the wireless zone display 9. 10 is a control unit for setting the control channel of the radio receiver 2 and for line connection, and as shown in FIG. 4, the home zone number of the mobile station M.
, the zone number of the current location of the mobile station M, and the zone number of the notification destination using dedicated up/down switches 10d, 10e, and 10f, respectively.
, , are displayed on the display sections 10a, 10b, and 10c. The control unit 10 further includes a home zone setting switch 10g, and by pressing this switch 10g, the display unit 10
Zone numbers a, 10b, and 10c are automatically set as home zone numbers. Reference numeral 11 denotes an alarm, which issues a timed alarm when the reception level memory unit 7 selects a new wireless zone to be used, or after the control channel becomes below the communication limit value. Check to see if they match. In addition, the alarm 11 displays the wireless zone number 10b set in the control signal unit 10 when the power switch 12 of the radio is turned on, and the display on the wireless zone display 9 obtained by the control channel search. It is tested whether they match, and if the two values are different, an alarm is generated. When both values are equal, no alarm sound is generated. If this alarm sound continues to occur, it will be automatically canceled after a certain period of time, or if it occurs intermittently, it will be canceled automatically after a certain number of times, or the alarm will be canceled by pressing the alarm cancellation button. You can also do that. In addition to acoustic alarm sounds such as buzzers,
Any audio signal can be selected, such as an audio signal from an electronic audio generator.

The wireless zone display 9 may be of the type shown in FIG. 5A, in which dials representing the wireless zones a...h are arranged in rows and columns and illuminated from the back, or as shown in FIG. A suitable type is one in which the wireless zones a...h are represented graphically in a map and a light emitting part is provided near the center of each, and it is convenient to drive by an IC if an LED is used as the light emitting element. Of course, to display the numbers or symbols of the wireless zones a...h on the wireless zone display 9, any device such as a light bulb lamp or a liquid crystal display can be used. For example, wireless zone a...
When h is displayed graphically on a map, wireless zone a
It would be effective to display on a liquid crystal display the number or symbol of h and the outline of a figure indicating wireless zone a...h to indicate the service area.

The display method of the wireless zone display 9 is to display all wireless zones of 0 dB or more that can be used for communication as shown in A ₁ in Fig. 6, or to display all wireless zones that are 6 dB or more as shown in A ₂ , or 12 dB or more as shown in A ₃ , or It is also possible to display light emission only in the wireless zone of 20 dB or more, such as _A4 . In other words, the reception level is detected step by step,
The highest reception level is Km, and each wireless zone a...
When the reception level of h is K, K-Km+1=
1 and K-Km+n>1 (n can be selected arbitrarily). Said _A1
For A2, n=3, for _{A3 ,} n=2, and for _A4 , n=1.

Further, instead of stopping the light emission as in the example of FIG. 6, the luminance of the light emission display of the wireless zone display 9 may be changed and displayed as shown in FIG. In this case, Km is the maximum brightness as in B ₄ ,
Or reception level or evaluation value K like B ₂ and B ₃
If the value exceeds a certain value, it will be displayed at the highest brightness, and the others will be displayed at a uniformly lower brightness.

As a modification of the display method shown in FIG. 7, the luminance of the light emitting display can be changed in proportion to the reception level or the evaluation value K, as shown in FIG. In this method, as shown in C ₄ , Km is the highest brightness, Km-1 is the next highest brightness, and Km-3 is the lowest brightness.
It is effective when the value of is 4 or less. Also C ₂ , C ₃
It is also possible to set the highest brightness to those for which K exceeds a certain value, and to change the brightness of the others in stages.

FIG. 9 shows another display method. W is
Km is intermittent. N ₁ is an example in which a two-color light emitting diode is used for the wireless zone indicator 9.
The optimum zone is indicated by displaying the zone in red and the others in green. _N2 is a version of Km that emits green and red lamps at the same time. WN ₁ changes Km from green to red and displays it intermittently. WN ₂ is
Km is displayed alternately in green and red to attract more attention. The display methods shown in Fig. 9 all use the method _A1 in Fig. 6, but the methods _A2 , _A3 , and _A4 , each method in Fig. 7, and each method in Fig. 8 are also used. It is also possible to use both methods.

Effects of the Invention As is clear from the above description, according to the present invention, when a mobile station starts a radio, or when the reception input of the control channel during reception has decreased and is below the communication limit value, the mobile station can It is possible to scan the control channels available to the station, store the reception level in memory, and display the radio zones of the control channels that exceed the communication limit value. In addition, if the reception input drops below the communication limit, or if the new wireless zone is different from the wireless zone set in the control unit, a warning will be issued according to each condition to alert the mobile station user. It has the advantage that it is possible to set an appropriate wireless zone, and furthermore, it is possible to perform communication based on the user's intention and judgment.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the arrangement of wireless zones to explain the present invention, Fig. 2 is a diagram showing the reception status of a mobile station to explain the invention, and Fig. 3 shows an embodiment of the present invention. 4 is a front view showing the arrangement of switches in the control section, FIGS. 5A and B are front views showing the dial arrangement of the wireless zone display, and FIGS. FIG. 9 is a diagram showing examples of wireless zone display methods. DESCRIPTION OF SYMBOLS 1...Antenna, 2...Radio receiver, 3...Wireless channel switch, 4...Reception input level detection section, 5...Timer, 6...Channel switching memory section, 7...Reception level memory section, 8...Wireless zone display drive unit, 9...Wireless zone display unit, 10...Control unit, 11...Alarm, 12...
Power switch.

Claims (1)

[Claims] 1. A wide area mobile station that moves and communicates between a plurality of wireless zones arranged so that control channels and communication channels of adjacent wireless zones do not interfere with each other is equipped with a wireless receiver and a wireless receiver. a wireless channel switching section for switching channels of the mobile station; a channel switching memory section for storing a control channel of a wireless zone in which the mobile station moves and providing control channel information to the wireless channel switching section to switch channels; and a mobile station. a reception level detection unit that sequentially scans control channels of wireless zones accessible by the user and detects the reception level from the output of the wireless receiver; When the reception level is below the communication limit value, a predetermined signal is output at a short time timing, and as the reception level increases, a predetermined signal is output at a longer time timing, and the wireless channel memory switching is performed. a reception level memory section that takes in reception level information from the reception level detection section for each zone; a wireless zone display drive section that operates based on information from the reception level memory section; A wireless zone display device that displays a wireless zone accessible to a mobile station based on the output of a zone display driver unit, and a control unit that sets a control channel of the wireless receiver and connects the line. Characteristic location display device. 2. A wide-area mobile station that moves and communicates between multiple wireless zones arranged so that the control channels and communication channels of adjacent wireless zones do not interfere is equipped with a wireless receiver and a wireless device that switches the channels of this wireless receiver. a channel switching unit; a channel switching memory unit for storing a control channel of a wireless zone to which a mobile station moves; and providing control channel information to the wireless channel switching unit to switch channels; and a wireless zone accessible by the mobile station. a reception level detection unit that sequentially scans the control channels of the wireless receiver and detects the reception level from the output of the radio receiver, and information from the reception level detection unit that informs that the reception level has fallen below the reception limit value. and a timer for driving the wireless channel memory switching unit by outputting a predetermined signal at a short time timing when the reception level is below a communication limit value and at a longer time timing as the reception level increases. , a reception level memory unit that takes in reception level information from the reception level detection unit for each zone; a wireless zone indicator drive unit that operates based on information from the reception level memory unit; A wireless zone display device that displays a wireless zone accessible to the mobile station by output, a control section for setting a control channel of the wireless receiver and making a line connection, and information and a control section for the reception level memory section. What is claimed is: 1. A location display device comprising: a sounding section that compares control channel setting information of the two sets of information, and is activated to issue an acoustic notification when the two values are different.