JP2596983B2 - Multi-channel receiving radio paging receiver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel radio paging receiver having a function of automatically switching a reception channel.

[Conventional technology]

In a radio paging method, a method is used in which a service area that is close in distance is called using a channel of a different frequency for each base station in order to prevent interference.

And the radio paging receiver used in such a system,
It is designed to be able to receive a plurality of channels, and when the receiver carrier moves to a different service area, the receiving channel is switched and used.

In such a conventional multi-channel reception type radio paging receiver, switching of the reception channel is performed by the user manually switching the frequency of the local oscillator of the receiver while being aware of the place where the user is now. A method of switching to an appropriate reception channel was adopted.

[Problems to be solved by the invention]

In the above-mentioned conventional multi-channel reception type paging receiver, the user needs to always know the service area where he / she is located. There was a problem that it could not be received.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a radio paging receiver that can automatically switch a reception channel and can be used without a user being aware of an area where the user is.

[Means for solving the problem]

According to the present invention, the above objects are achieved by the means as set forth in the claims.

That is, the present invention relates to a radio paging receiver configured to receive a plurality of channels and perform intermittent reception, wherein the reception channel is synchronized with a certain period in a synchronous relationship with the intermittent reception period. Means for temporarily switching to another reception channel, a register for storing a channel number when a reception channel capable of receiving a radio paging signal exists when the reception channel is switched, and This is a multi-channel reception type radio paging receiver that switches the reception channel to the reception channel of the channel number stored in the register when the radio paging signal can no longer be received on the other channel.

[Action]

The multi-channel reception type radio paging receiver of the present invention receives a paging signal by periodically switching to another reception channel during reception on one reception channel and receiving a radio paging signal in those reception channels. If there is an available reception channel, the number of the reception channel is stored in the register, and when the channel which has been received so far cannot receive the radio paging signal due to a decrease in the reception level,
The control is performed so as to automatically switch to the reception channel of the channel number stored in the register.

〔Example〕

FIG. 1 is a block diagram of one embodiment of the present invention,
1 indicates a synthesizer oscillator. Then, the data selector 2 selects either the channel register 4 or the data of the counter 3 for the channel, and the synthesizer oscillator 1 oscillates at a frequency corresponding to the content of the selected data, and the receiving channel is selected.

A channel number currently being received is set in the channel register 4, and the data selector 2 normally selects the channel register 4.

Reference numeral 6 denotes a quaternary counter, which outputs an RF signal from the intermittent reception control circuit 7.
The pulse sent at the timing when the power of the unit is turned off is counted, the data selector is switched from the channel register 4 to the channel counter 3 at a rate of once every four times, and the reception channel is switched to the channel indicated by the value of the channel counter. .

When the radio call signal can be received on the switched channel, the in-area pulse is sent from the decoder circuit 8 and the contents of the channel counter 3 are transferred to the channel register 5.

In the latter half of the select pulse, a count pulse is generated from the quaternary counter, and the value of the channel counter 3 increases to prepare for the next reception.

If the radio paging signal cannot be received while the data selector 2 is selecting the channel register 4, an out-of-service pulse is sent from the decoder circuit 8, and the channel number stored in the channel register 5 is stored in the channel register 4. Is transmitted, the channel switching is performed.

With the above operation, the receiver of this embodiment automatically switches the receiving channel.

FIG. 2 is a timing chart showing an example of the operation of this embodiment.

In the figure, f ₁ ~f ₃ represents a reception channel number or an equivalent value. The display related to the select pulse shows that the input (A, B) of the data selector 2 in FIG. 1 is switched by the select pulse.

In the configuration of the embodiment shown in FIG. 1, the output of the decoder circuit can be used as a ringing-type radio paging receiver or a display-type radio paging receiver. .

Further, in the embodiment shown in FIG. 1, the case where the counter is quaternary is shown, but this is not limited to quaternary.
You can use any octal counter.

In this embodiment, the case where a synthesizer oscillator is used as the local oscillator of the receiver is shown. However, the same effect can be obtained by the same control even with an oscillator by switching a plurality of crystal oscillators. Can be.

Further, the period of the intermittent reception controlled by the intermittent reception control circuit 7 is set to a period shorter than the burst length of the radio paging signal or a self-addressed radio paging signal is transmitted. A method such as performing intermittent reception in synchronization with a cycle in which a signal may be transmitted may be employed.

〔The invention's effect〕

As described above, the multi-channel reception type paging receiver according to the present invention periodically scans reception channels other than the currently used reception channel to detect a receivable reception channel and stores it. In addition, when the working channel becomes unreceivable, the reception is automatically switched to the stored reception channel, so that there is no need for the user to recognize his own position and manually switch the channel. Therefore, there is an advantage that the convenience of the radio paging receiver is further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a timing chart showing the operation of the present embodiment. 1 ... Synthesizer oscillator, 2 ... Data selector, 3
…… Channel counter, 4,5 …… Channel register, 6
... Quaternary counter, 7... Intermittent reception control circuit, 8... Decoder circuit, 9.

Claims (1)

(57) [Claims] Claims: 1. It is possible to receive a plurality of channels,
And a radio paging receiver configured to perform intermittent reception, a means for temporarily switching a reception channel to another reception channel at a fixed period synchronous with the intermittent reception period, and switching the reception channel. When there is a reception channel that can receive a radio paging signal when performing the above, a register for storing the channel number and a register for storing the radio paging signal when the channel that is currently being received cannot be received. A multi-channel reception type radio paging receiver characterized in that a reception channel is switched from a stored channel number to a reception channel.