JPS598094B2 - Mobile message communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile message communication system in which a general subscriber sends a message to a display pager terminal via a base station.

In addition to the conventional pager method that simply calls a portable mobile terminal, a display pager method has been proposed that sends a simple message to the portable mobile terminal and displays this message on the portable mobile terminal. Such a portable mobile terminal is also called a pager terminal with a display.

In a mobile message communication system using a pager terminal with a display, unlike the conventional pager system, the message itself is transmitted, so some means for confirming whether the message is correctly received by the other party is desired. In the car telephone system, which is another form of mobile message communication system, the mobile terminal and the base station are configured to communicate while mutually occupying the communication channel, so the mobile terminal can freely make calls, and the base station Based on the response from the mobile station, it can be easily confirmed whether the mobile terminal has correctly received the message.

However, in this car telephone system, a large number of communication channels must be prepared between the base station and the mobile terminal, and the mobile terminal has a corresponding problem in that the communication channel selection mechanism becomes complicated. Therefore, it is not a good idea to apply the configuration of the above-mentioned car phone system directly to the display pager system, and even if one were to try to apply it, it would be necessary to use complex hardware similar to car phones in a portable terminal where simplicity is an absolute requirement. It is almost impossible to incorporate clothing.

The present invention has been made in view of the above problems, and
The purpose is to provide a mobile message communication system that allows the calling party to easily check responses such as whether the mobile terminal has correctly received the message without complicating the configuration of the display-equipped pager terminal. .

Hereinafter, the details of the present invention will be explained in detail with reference to Examples.

FIG. 1 is a block diagram of the main parts of a base station according to an embodiment of the present invention, in which 1a to 1n are general subscribers, 2 is a line control unit, and 3 is a block diagram of main parts of a base station according to an embodiment of the present invention.
is a main memory, 4 is an encoder, 5 is a transmitter, 6 is a duplexer, 7 is an antenna, 8 is a receiver, 9 is a control unit, and 10 is a signal generator. The transmission information to the main memory 3 is sent by the line control unit 2 to the
are stored in order.

The contents of the main memory 3 are read out under the control of the control unit 9, applied to the encoder 4, added with an error correction code, applied to the transmitter 5, and sent from the antenna 7 via the duplexer 6. Sent out. The transmission information added with this error correction code is repeatedly transmitted n times. Note that it is also possible to send out data repeatedly n times without adding an error correction code.
It is also possible to add an error correction code and send it only once. FIG. 2 is a block diagram of the main parts of the pager terminal with display according to the embodiment of the present invention, where 21 is an antenna, 22
23 is a receiver, 24 is a memory, 25 is a comparator, 26 is a memory, 27 is a display, 28 is a control button switch, and 29 is a transmitter.

As shown in FIG. 3a, the base station repeatedly sends out transmission information #1 to #3, for example, with n=3, and this transmission information is, for example, synchronized with synchronization signals SYN and SYN as shown in FIG. 3b.
It consists of a calling number NR such as a mobile terminal number and a message MSG, and when the receiving unit 23 identifies that the information is addressed to itself, #1 to #3 are stored in the memory 24.
Memorize all sent messages. Comparator 25 compares messages #1 to #3 stored in memory 24,
The message determined to be correct by the majority voting method is stored in the memory 26.
The memorized message is displayed on the display section 27.
to be displayed.

In addition, the comparator 25 can identify completion of receiving a predetermined number of messages by comparing messages #1 to #3.
When a correct message is obtained by majority voting, a reception completion signal is applied to the transmitter 29. In the transmitter 29, 3 in Fig. 3c
As shown by 1, a reception completion signal is sent out t seconds after the reception is completed.

Note that when the comparator 25 cannot obtain majority logic because the messages each time are completely different due to some kind of failure, the comparator 25 sends a signal to the transmitter 29 indicating poor reception. As a result, the transmitter 29 sends a reception completion signal 3.
A reception failure signal is sent instead of 1. Further, the time t can be easily set by providing the comparator 25 or the transmitter 29 with a timer function. At the base station, #1 to #
After transmitting the information No. 3, the receiving section 8 is placed in a standby state in preparation for receiving a response signal indicating completion of reception or poor reception from the display-equipped pager terminal.

This waiting time is set to time T5 of T7>t, and upon receiving the reception completion signal from the display-equipped pager terminal, the control section 9 operates the signal generator 10 to send out the reception completion signal to the originating subscriber. Also, when a reception failure signal is received, the signal generator 10 is operated to send a reception failure signal that can be distinguished from a reception completion signal to the originating subscriber. If a response signal is not received from the display pager terminal within t/time, it is assumed that the display pager terminal is absent (i.e., the power switch has been turned off or it has moved out of the service area). Then, the signal generator 10 sends an absent signal to the originating subscriber. If a signal other than the above-mentioned reception completion signal is sent to the originating subscriber, communication is cut off and communication shifts to another display-equipped pager terminal, and if a reception completion signal is sent, the time τ of ↑〉T The mobile terminal is in a standby state for receiving a signal from the mobile terminal.

In the case of a pager terminal with a display, the control button switch 28 is operated within T seconds after sending out the reception completion signal 31, and the message from the calling subscriber is confirmed by the display contents of the display section 27. Operate control button switch 28.

By operating the control button switch 28, the display unit 27 displays a message indicating that the operation for transmitting a signal to notify the base station that this terminal is not absent is displayed, and the transmitting unit 29 transmits the signal after transmitting the reception completion signal 31. After a second, it sends out a signal 32 (FIG. 3c) to notify the base station that it is not absent. In the base station, when the control unit 9 identifies that this signal 32 has been received within the time τ, it sends a communication termination signal to the originating subscriber and disconnects communication to this display-equipped pager terminal.
In addition, when the signal 32 cannot be received within the time, the control section 9
sends an absence signal to the originating subscriber to notify that the receiving party is absent, and disconnects the communication.

As explained above, in the present invention, messages sent from a general subscriber to a mobile phone terminal with a display are temporarily stored in the main memory 3 of the base station, and are sequentially read out and transmitted under the control of the control unit 9. In response to communication requests from general subscribers that occur over time, time-controlled information can be sent to display-equipped pager terminals, and the base station can temporally control response signals from display-equipped pager terminals. Since the status of the display-equipped pager terminal can be easily identified at the base station, the calling subscriber can be notified of the status of the display-equipped pager terminal.

When a message is transmitted from a base station with an error correction code added, the comparator 25 of the above-mentioned embodiment is used as an error correction detection circuit to automatically correct a 1-bit error,
All that is required is to detect bit errors and generate a signal indicating poor reception based on the error detection. When a message to which this error correction code has been added is repeatedly sent out multiple times, the correct message can almost always be received by the majority vote method, unless there is a serious failure. Since this message is relatively short, even if it is repeatedly sent out a plurality of times, the occupied time is small, and message communication to a large number of display-equipped pager terminals can be carried out efficiently. In addition, the base station generates a reception completion signal from the signal generator 10 in response to the response signal from the display-equipped pager terminal.
By generating either a poor reception signal or an absence signal and sending it to the originating subscriber, it is possible to easily identify whether a message to a display pager terminal has been correctly transferred.

In conventional pager calls, the calling subscriber did not know whether the call had been made or not until the calling subscriber was contacted by telephone. However, according to the present invention, a message can be sent to the person carrying the display pager. Since the originating subscriber can immediately identify the completion of transmission, absence, etc. of the message, the reliability of message communication can be improved. Furthermore, by identifying the status of the display pager terminal at the base station, the normality of the wireless line can be monitored.

[Brief explanation of drawings]

1 and 2 are block diagrams of main parts of a base station and a mobile terminal according to an embodiment of the present invention, and FIG. 3 is an operation explanatory diagram. 1a to 1n are general subscribers, 2 is a line controller, 3 is a main memory, 4 is an encoder, 5 is a transmitter, 6 is a duplexer, 7
8 is an antenna, 8 is a receiving section, 9 is a control section, 10 is a signal generation circuit, 21 is an antenna, 22 is a duplexer, 23 is a receiving section, 24 is a memory, 25 is a comparator, 26 is a memory, 27
28 is a display section, 28 is a control button switch, and 29 is a transmitting section.

Claims (1)

[Claims] 1 In a mobile message communication system in which a general subscriber sends a message to a display pager terminal via a base station, the display pager terminal detects an error in the message received from the base station, and displays the detection result. The base station sends a return signal consisting of a reception completion signal when the detection result is good, a reception failure signal when the detection result is bad, and a signal notifying that the display pager terminal is not absent after a predetermined period of time from the signal. and the base station notifies the calling party of completion of reception or reception failure according to each of the reception completion signal or reception failure signal among the return signals received from the display pager terminal. With,
A mobile message communication system characterized in that if the return signal is not received from the display-equipped pager terminal within a predetermined period, the caller is deemed to be absent and the calling party is notified of this fact.