JPH0642646B2 - Wireless communication system - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a wireless communication system for wirelessly transmitting and receiving information.

[Prior art]

Conventionally, as such a wireless communication system, a data signal is transmitted from a base station by calling a telephone, and a specific pocket bell is driven to emit sound according to the data signal,
2. Description of the Related Art A wireless telephone or the like for making a mutual call by wireless has been realized.

[Problems of conventional technology]

However, in such a case, when the transmission partner is out of the range of the radio wave, the transmission becomes impossible, and the transmission is repeated many times until the radio wave arrives, resulting in waste of the transmission / reception processing. If there are many senders,
The same transmission process had to be performed by individually specifying the other party.

[Object of the Invention]

It is an object of the present invention to provide a wireless communication system that can efficiently perform message transmission / reception processing. More specifically, it is an object to provide a wireless communication method that requires only a short occupied time of a communication circuit and a wireless communication method that can simplify the transmission process on the message sender side.

[Main points of the invention]

In order to achieve the above object, the present invention provides message data transmitted from each mobile communication terminal together with a terminal code indicating a partner mobile communication terminal, for each mobile communication terminal specified by the terminal code or other The essential point is that the plurality of message data stored in the wireless relay device in the form of a format is transmitted collectively for each mobile communication terminal specified by the terminal code.

[Structure of Example]

 An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an overall circuit diagram of the master station (relay device).
In the figure, reference numeral 1 denotes a CPU, and this CPU 1 performs information transmission / reception processing based on a program stored in a ROM 2. The RAM 3 is provided with a transmission message memory M ₁ and a time memory M ₂ shown in FIGS. 4 and 6 which will be described later, and the CPU 1 accesses the data.

The data from each of the memories M ₁ and M ₂ is read by the CPU 1, and the interface 5 in the transmitter / receiver circuit 4 is read.
The error code (BCC code) is added by the ECC (error collecting code) conversion circuit 6 via the P / S
An FM transformer in which (parallel / serial) conversion circuit 7 converts the data into serial data, FSK (frequency shift keying) conversion circuit 8 performs digital frequency modulation, and a signal f from CPU 1 switches between a transmitter function and a receiver function. Distribution circuit 1 through Mitter / Receiver 9
It is transmitted from the antennas 11 through 0.

Further, the data transmitted from a slave station (mobile communication terminal) described later is received by the antenna 11 ... And demodulated by the FSK demodulation circuit 12 through the FM transmitter / receiver 9 via the distribution circuit 10 and S / P conversion. The circuit 13 converts the data into parallel data, the ECC error correction circuit 14 performs error checking, and the CPU 15 through the interface 15
The data is set in the receiving memory Ma shown in FIG. In the CPU 1, the transmission check memory Mb shown in FIG.
Is also provided.

The reception memory Ma in the CPU 1 comprises a reception data storage section for temporarily storing the message data sent from the slave station and a slave station code X section in which the slave station code is set, and the transmission message shown in FIG. memory M ₁ is intended to transmit the message data for each slave station is stored, the message data is excisional child station area corresponding to the partner Sakiko station code X in the reception memory Ma. Further, the transmission check memory Mb is provided for each of the 256 slave stations from the 00 (00000000) station to the FF (11111111) station.
The transmission message memory M stores a data presence flag F ₀ indicating the presence or absence of data to be transmitted to the slave station and an absence flag L indicating whether the slave station is within the range of radio waves.
_When the message data is set to ₁ , a data present flag F ₀ is set for each slave station corresponding to the total slave station area of this data set. Further, the time memory M of FIG.
₂ has a register from second to year, and counts the current time.

FIG. 2 shows an overall circuit diagram of the slave station. In the figure, 16 is a key input unit, and the data input from this key input unit 16 is processed by the CPU 18 based on the program stored in the ROM 17. , Is written in the RAM 19 and displayed on the display unit 20. The RAM 19 is provided with a data memory M ₁₁ shown in FIG.
Data is accessed by 18.

The data memory M ₁₁ is set with a data presence flag F ₁ indicating the presence / absence of data to be transmitted, as well as a partner slave station code and message data.

The data in the data memory M ₁₁ in the RAM 19 is the CPU
It is read by 18 and transmitted from the antenna 22 via the same transmitting / receiving circuit 21 as that of the master station. The data received from the master station is sent to the CPU 18 via the transmission / reception circuit 21.
Is written in the data memory M ₁₁ in the RAM 19 and displayed on the display unit 20.
A notification unit that notifies the message is configured. Furthermore, the buzzer 23 is driven to emit sound when receiving message data,
Further, the CPU 18 counts the current time.

A command as shown in FIG. 8 is used for transmission / reception between the master station and the slave station, and transmission / reception is performed as shown in FIG. That is, when the master station receives a transmission from the slave station, the master station transmits the P command, the delimiter code K, and the slave station code in this order as shown in FIG. When sending data, select Q as shown in (b) of the same figure.
Command, slave station code, mode code, message, B
When the CC station and the R command are transmitted in this order from the master station and there is no data to be transmitted from the slave station, only the S command is transmitted from the slave station as shown in FIG. When transmitting data, as shown in FIG.
Command, mode code, message, BCC code,
It is transmitted from the slave station in the order of R command. In addition, NAK and ACK codes are used as codes for presence / absence of errors. These transmissions and receptions are performed at a speed of 19200 bits / second, and a delimiter code is sandwiched between each code, command and data.

FIG. 10 shows an overall external view of the transmitter / receiver of the slave station, and there are a pocket-sized calculator type and a wristwatch type. The above-mentioned antenna 22 is provided at the upper left end of the calculator type of FIG. 10 (a), the above-mentioned display unit 20 is provided at the upper part of the same device, and the above-mentioned key input unit 16 is provided at the lower part. The buzzer 23 is provided on the lower right side of the display unit 20, and the two LEDs 24 are provided on the lower left side of the display unit 20. Each of the keys of the key input unit 16 has a function of inputting three types of characters, numbers and symbols with one key, and this function is selected by the shift key at the upper right end, and the selected state is displayed on the LED 24. The wristwatch type has almost the same external configuration as shown in FIG. 10 (b).

[Operation of Example]

 Next, the operation of this embodiment will be described.

<Overall Processing of Master Station> The CPU 1 of the master station constantly performs the flow processing shown in FIG. That is, the CPU 1 first sets the slave station code X to "00".
As the transmission mode (steps A ₁ and A ₂ ), the P command and the slave station code X of “00” are transmitted, and the slave station “00” is transmitted.
Query the presence of transmission data to the switches to receive mode (step _A 3 _~A 5). Next, if the response from the slave station is not the S command and there is data to be received from the slave station "00" by the T command (steps A ₆ and A ₇ ), the receiving process described later is performed (step A ₈ ). The absence flag L is cleared (step A ₉ ), and if there is no data to be received by the S command in the response from the slave station, the absence flag L is cleared as it is. Unless S command also T command also obtained here, the slave station "00" will be in the outside reach of radio wave of the parent station, and sets the absence flag L (step A _13).

After clearing the absence flag L, if the data presence flag F ₀ is set, the CPU 1 determines that there is data to be transmitted to the slave station “00”, switches to the transmission mode and performs the transmission processing described later (step A _{10 to} A ₁₂ ), and if the data presence flag F ₀ is cleared, the transmission process is not performed. Then, the CPU 1 performs the above processing from the slave station "00" to the slave station "FF".
It is judged whether or not it is completed (step A ₁₄ ) and FF
If not carried out until the station increments the slave station code X and the next "01" station (step A _15). Thus, the time when the memory M ₂ than 1 minute Kiyari or signal is then to obtain or absence flag L is long is cleared (step A
₁₆ , step A ₁₇ ) and the above-mentioned transmission / reception processing of steps A _{2 to} A ₁₄ are also performed for the slave station “01”, but if the absence flag L is set if it is not immediately after the 1-minute carry signal is output. station the processing is not performed for "01", increments the contents of the X returns to step a ₁₅ in the "02" station, similar in step a _16, a ₁₇ also for the "02" this slave station Perform processing.

<Overall Processing of Slave Station> On the other hand, the CPU 18 of the slave station constantly executes the flow processing shown in FIG. That is, when the Q command is given from the master station by the CPU 18 from the P command (step B ₁ ,
B _3), the next slave station code X for this command to determine the code of his own station (step _{B 2, B} 4). If it is the P command for permitting transmission to the master station and the own station code and the data present flag F ₁ is set, the CPU 18 determines that there is data to be transmitted to the master station (step B ₅ ), and transmits. switching the mode, after transmission processing to be described later, back to the transmission mode (step _B 6 _~B 8). If the data flag F ₁ is not set here, the transmission mode is set and the S command is sent (B ₉ , B ₁₀ ).

If the command is the Q command with transmission data from the master station and the own station code, reception processing is performed (step B ₁₁ ).
If it is not the own station code (steps B ₂ and B ₄ ), the above-mentioned transmission / reception processing is not performed, and the timekeeping processing, display processing and key input unit 1
Data memory M _{11 for} message data input from 6
Setting processing is performed (step B ₁₂ ).

<Transmission Processing from Child Station to Parent Station> FIG. 17 shows the display contents of the child station “A3” in a normal state, in which the date, the day of the week, and the time are displayed.

In this state, enter (EN) in the key input unit 16 of the slave station.
When the T) key is operated, the mode is switched to the message sending mode. Here, in order to send a message to the slave stations “OC”, “C4”, and “F1” that the meeting will be held in room 103 from 11:00 am on May 12, in the form shown in FIG. Just enter the key. Then, the CPU18 of the slave station "A3" flag F of the data memory M setting processing of the input data to ₁₁ and the data memory M ₁₁ in the above step B _12
1 stand and performs display processing on the display section 20, second 11 Figure step _A 2 to A _4, P having a slave station mode X of "A3" of the self station in Figure 12 of the _B 1, _{B 2} of the process When the command is given, the CPU 18 carries out the transmission processing of the step B ₇ .

The transmission process is performed based on the flow shown in FIG. That is, the CPU 18 sends the T command with the transmission data to the master station and the partner station code “OC”, “C4”, “F1”.
And the message contents are transmitted, and subsequently, the BCC code and the R command are transmitted (steps C _{1 to} C ₄ ). The form of this transmission signal is as shown in FIGS. 9 (d) and 9 (g).
Then, the CPU 18 returns to the reception mode (step C ₅ ).

Then, the CPU 1 of the master station makes a step A in FIG.
In the process of ₅ to A _7, to determine the transmission of the message data, performs reception processing of the step A _6.

This reception process is performed based on the flow shown in FIG. That is, if there is an error in the received data based on the BCC code of the received data signal, the CPU 1 switches to the transmission mode, transmits the NAK code with the error to the slave station, requests retransmission, and returns to the reception mode ( Step E ₁ ~
E _4).

In contrast, the CPU18 of the slave station "A3" determined from the NAK code is transmitted, it retransmissions needed (Figure 13, step _C 6), step _C 2 -C ₄ again
The transmission process is performed.

If there is no error in this retransmission process, the CPU 1 of the master station switches to the transmission mode, transmits an ACK code without error to the slave station “A3”, and sends the slave station code “OC” of the partner message of the transmission message memory M _1. "" C4 "" and excisional respectively message data to the slave station area corresponding to F1 ", sets a data present flag F ₀ to the transmission Chietsukumemori Mb this partner Sakiko station (Figure 15, step E ₅ to E ₇ ).

Thus, from the slave station "A3" to the slave stations "OC", "C4", "F"
When sending data to “1”, when you send the data from the child station “A3” to the parent station, the data will automatically be sent to the child station “O”.
Even if the destination slave station is out of the radio wave range, it is not necessary to perform the transmission process many times and call the other party even if the destination slave station is out of the radio wave range.

Then, the CPU18 of the slave station "A3" because it now sent an ACK code, transmission is determined to have been performed without error (step C _6), completing the transmission process.

<Transmission process from master station to slave station> Next, the CPU 1 of the master station performs the above steps A ₈ (E _{1 to} E _1).
After the receiving process of ₇ ), the partner slave station “OC” “C4”
In reception processing for "F1", performs transmission processing of step A _12.

This transmission process is performed based on the flow shown in FIG. That is, the CPU 1 transmits a Q command with transmission data to the slave station, a slave station code X of the other party, for example, "OC", and message data, and subsequently transmits a BCC code and an R command (steps F ₁ to F ₅ ). The form of this transmission signal is as shown in FIG. 9 (b). Then CP
U1 returns to receive mode (step _F 6).

Then, CPU 18 of the slave station "OC" is the processing of step _{B 1, B 3, B 4} of Figure 12, determine that the Q command with slave station code X of "OC" of the self station is given Then, the CPU 18 performs the receiving process of the step B ₄ .

This reception process is performed based on the flow shown in FIG. That is, if there is an error in the received data based on the BCC code of the received data signal, the CPU 18 of the slave station "OC" switches to the transmission mode, transmits the NAK code with the error to the slave station, and requests retransmission. , Return to the reception mode (steps D _{1 to} D ₄ ).

On the other hand, since the CPU 1 of the master station has sent the NAK code, it determines that the retransmission is necessary (step F _{7 in} FIG. 16), and performs the transmission processing of steps F _{1 to} F ₅ again.

If there is no error in this retransmission processing, the CP of the slave station "OC"
U18 is switched to transmit mode, transmit the ACK code without error in the master station, the contents of Metsuseji on the display unit 20 outputs an alarm sound in the buzzer 23 as well as excisional the message data in the data memory M ₁₁ itself Show (step _D 5 _~D 7).

Similarly, for other slave stations "C4" and "F1", message data transmission and reception, alarm, and display are performed in each slave station.

In this way, when the child station "A3" sends the data to the parent station, the data is automatically transferred to the child stations "OC", "C4" and "F1", and the child stations "OC", "C4" and "C4". It is not necessary to individually send each F1 ”.

Then, the CPU 1 of the master station determines that the transmission has been performed without error because the ACK code has been sent this time (step F ₇ ), and the “O” of the transmission message memory M ₁ is sent.
The message data in the slave station area "C" and the data presence flag F ₀ of the transmission check memory Mb are cleared, and the mode is returned to the transmission mode (steps F ₈ and F ₉ ).

[Effect of Example]

In the present embodiment, the master station designates the slave station in a time division manner, receives the data, stores the data for each partner slave station, and transmits the data when the respective counterparts are designated. The process of transferring data to the slave station can be performed quickly. Also, even if a plurality of child stations send a message to one child station, all of them will be sent after being stored in the parent station. I can't wait for other stations to interrupt when I am communicating with each other. Data can be transmitted quickly, and the circuit configuration of the master station can be made very simple.

In the above embodiment, the data is set in the slave station area of the transmission destination, but it may be temporarily set in the slave station area that transmitted the data and transmitted at the designated destination. The recipient of the transmission may be his or her own so that he or she will not forget. Also, the master station may store the above message contents and time, and retransmit at the time of the message contents.In this case, the time data in the time memory in the slave station is sent by the signal from the master station at the message time. May be modified. Furthermore, in addition to displaying the message contents at the slave station, the message contents may be sent by voice when inputting or receiving.

〔The invention's effect〕

As described above, according to the present invention, the message data transmitted from each mobile communication terminal (slave station) together with the terminal code indicating the partner mobile communication terminal is sent to each mobile communication terminal specified by the terminal code. Alternatively, the communication circuit is temporarily stored in the wireless relay device (master station) in another format, and the stored plurality of message data are collectively transmitted to each mobile communication terminal specified by the terminal code. Occupancy time is short, and the message sending process on the calling terminal side can be simplified. That is, the communication between the calling terminal and the relay device is performed once regardless of whether or not the partner terminal is within the communicable area with the relay device, and even when the partner terminal is plural. In addition, the real time for transmitting message data from the relay device to the destination terminal is much shortened compared to the conventional individual transmission method when there is a message transmission request from multiple terminals to the same terminal. be able to.

[Brief description of drawings]

1 and 2 are overall circuit diagrams of a master station and a slave station, FIGS. 3 to 7 are diagrams showing various memories in the CPU 1, RAM 3 and 19 of the master station and the slave station, and FIG. FIG. 9 is a diagram showing types of commands for use in transmission, and FIG. 9 is a diagram showing transmission / reception data patterns,
10 to 16 are flowcharts of transmission / reception processing of the master station and the slave station, and FIGS. 17 and 18 are display units 2 of the slave station.
It is a figure which shows the state of 0 change. 1, 18 ... CPU, 3, 19 ... RAM, 4, 21, ...
... Transmit / receive circuit, 11, 22 ... antenna, 16 ... key input section, 20 ... display section, M ₁ ... transmission message memory, Ma ... reception memory, Mb ... transmission check memory, M ₁₁ ... data memory.

Claims (3)

[Claims] 1. A wireless communication system in which a plurality of mobile communication terminals equipped with a radio wave transmitting / receiving device transmits / receives information via a relay device equipped with a radio wave transmitting / receiving device. Respectively, input means for inputting a terminal code and message data indicating the mobile communication terminal of the other party, first transmitting means for transmitting the terminal code and message data input by this input means to the relay device, and relay A first receiving means for receiving the message data addressed to itself transmitted from the device, the relay device, a second receiving means for receiving the terminal code and the message data transmitted from the mobile communication terminal, Storage means for storing message data received by the second receiving means from the plurality of mobile communication terminals, and a plurality of messages stored in the storage means And a second transmitting means for transmitting the data to the mobile communication terminal designated by the terminal code for each message data having the same terminal code received at the same time when the message data is received. And wireless communication method. 2. The storage means is a storage means for storing the message data received by the second receiving means for each mobile communication terminal specified by the terminal code received together with the message data. The wireless communication system according to claim 1, wherein the second transmission means collectively transmits the message data for each mobile communication terminal stored in the storage means to the corresponding mobile communication terminal. 3. The mobile communication terminal has means for collectively transmitting a plurality of terminal codes together with message data to a relay device as a terminal code for designating a partner mobile communication terminal, the relay device comprising: When a plurality of terminal codes are received from the mobile communication terminal together with the message data as a terminal code for designating the other party's mobile communication terminal, the received message data is designated in the storage means by the plurality of terminal codes. The wireless communication system according to claim 1 or 2, further comprising means for storing each mobile communication terminal.