JPH0683130B2 - 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 in a specific area such as a building premises, a stadium, a park, or a ski resort.

[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 telephone call by wireless has been realized.

[Problems of conventional technology]

However, when such a device is used for wireless communication in a building premises or a specific area, it is necessary to simplify it. For example, when transmitting and receiving between station A and station B, station C is used. Since it is necessary to enable transmission and reception to and from other stations such as station D, there is a problem that the circuit eventually becomes complicated and the repeater becomes large. Also, M station, B station and C station
In order to be able to receive the station and station D in parallel, for example, the frequency between A and B and the frequency between C and D (channel)
However, if the frequency is changed in this way, the device also becomes large in size.

Also, when the receiving side is transmitting and receiving with other people, other people can not participate and transmit and receive information during that time, and since the information transmitting side calls the receiving side before transmitting, When the receiving side was out of the reception range of the radio wave, it could not transmit, and had to make a number of calls to transmit.

[Object of the Invention]

Therefore, an object of the present invention is to provide a wireless communication system that is small in size, has a simple circuit configuration, and enables bidirectional one-to-many communication.

[Main points of the invention]

In order to achieve this object, the present invention is to transmit a transmission permission code and a slave station identification code from the master station to each slave station, and to transmit the information of the slave station from the slave station to the master station by radio wave after receiving the code. In addition to this, in addition to this, the main point is to determine whether or not there is information to be transmitted from the parent station to the child station, and to transmit the determined information to the child station by radio waves.

[Structure of Example]

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

Figure 1 shows the overall circuit diagram of the master station, where 1 is the CPU.
The CPU 1 performs information transmission / reception processing based on the program stored in the ROM 2, and will be described later.
The RAM 3 also forms a judging means for judging whether or not there is information to be transmitted to the slave station. In addition, a time memory M ₁ , a data bank memory M ₂ , a reserved memory M ₃ , a word memory M ₄ , an address name memory M ₅ , a message memory, a conversation memory, a game memory (not shown), etc. are provided in the RAM 3. Has been.

The data from each of these memories M _{1 to} M ₄ is temporarily set in the transmission memory Ma in the CPU 1, and the error code (BCC code) in the ECC (error collecting code) conversion circuit 6 via the interface 5 in the transmission / reception circuit 4. Is added, P / S
Converted to serial data by (parallel / serial) conversion circuit 7, FSK (frequency shift keying) modulation circuit 8
Is subjected to digital frequency modulation, and is transmitted from the antennas 11 ... through the distribution circuit 10 through the FM transmitter / receiver 9 which is switched by the signal f from the CPU 1.

In addition, the data sent from the slave station described later
11 ... Received by the FM transmitter via distribution circuit 10.
It is demodulated by the FSK demodulation circuit 12 through the receiver 9, converted into parallel data by the S / P conversion circuit 13, and the ECC error correction circuit 1
At 4, an error check is made, and it is temporarily set together with the slave station code X in the receiving memory Mb in the CPU 1 through the interface 15 and preset in the memories M _{1 to} M ₄ in the RAM 3. Here, the slave station code X is a code for identifying each of a total of 256 slave stations from the slave station "00" station to the "FF" station, and takes eight values from "00" to "FF". .

A transmission check memory Mc is also provided in the RAM 3, and as shown in FIG. 5, the transmission check memory Mc is a slave station for each slave station from station 00 (bit 00000000) to station FF (bit 11111111). A data presence flag F ₀ indicating whether or not there is data to be transmitted and an absent flag L indicating whether the slave station is within the range of radio waves are stored.

As shown in FIG. 6, the transmission memory Ma stores, for each slave station, a mode code to be sent to this slave station in Ma ₁ and a data content in Ma ₂ . Here, as shown in FIG. 4, the mode code indicates a command such as transmission of reservation contents and completion of reservation during transmission / reception, and the code issued by the master station is indicated by a circle in the parent column. , The code issued by the slave station has a circle in the child column. Further, as shown in FIG. 7, the receiving memory Mb stores the data content from one slave station and the code X (00 to FF) of the slave station. In addition to the above mode codes, the commands used for transmission and reception are
As shown in FIG. 3, for example, a command having transmission data and ending data transmission is also used.

The above-mentioned code, command, message indicating transmitted / received data content, and BCC code for error check are transmitted / received in the form shown in FIG. That is, when the master station receives a transmission from the slave station, as shown in FIG.
When the master station transmits data to the slave station in the order of the command, the delimiter code, and the slave station code, and when the master station transmits data to the slave station, the Q command, slave station code, mode code, If there is no data to be transmitted from the slave station, in the order of message, BCC code, R command, and there is no data to transmit from the slave station,
As shown in (c) of the figure, only the S command is transmitted from the slave station, and when transmitting data from the slave station to the master station, as shown in (d) of the figure, T command, mode code, message, BCC Codes and R commands are transmitted in this order from the slave station. These transmissions and receptions are performed at a speed of 19200 bits / second.

As shown in FIG. 8, the time memory M ₁ has a register from seconds to years, and counts the current time,
The 10-second flag J ₀ is set every second and the 1-minute flag J ₁ is set every 1 minute. The data bank memory M ₂ is the ninth
As shown in the figure, it is provided for each slave station and stores a name (company name) and a telephone number or a schedule or other arbitrary information (not shown), and the reservation memory M ₃ is
As shown in Fig. 10, x, y, z for each time of day
Use each meeting room of remember the code of the reserved slave station,
As shown in FIG. 11, the word memory M ₄ stores the English words in M ₄₁ and the Japanese syllabary in M ₅₁ , and the address and name memory M ₅ stores the name, company name, etc., as shown in FIG. The _M51 with address, phone number,
Is stored in M ₅₂ , and these M ₄ and M ₅ can also be created in ROM.

FIG. 2 shows an overall circuit diagram of the slave station. In the figure, 16 is a key input section, and the data input from this key input section 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, code memory M ₁₁ shown in FIG. 13, the data memory M ₁₂ is provided, the code memory M ₁₁ flags are stored for mode code shown in FIG. 4 described above, the data memory M ₁₂ is sent A data presence flag indicating that there is data to be written is described in F ₁ , transmission / reception data is described in M ₁₂₁ , and time data is described in M ₁₂₂ . The seconds of the M ₁₂₁ time data
CPU18 is counting.

The data in the RAM 19 is read by the CPU 18 and transmitted from the antenna 22 via the transmitting / receiving circuit 21 having the same configuration as that of the master station. Further, the received data from the master station is written in the RAM 19 by the CPU 18 via the transmission / reception circuit 21 and displayed on the display unit 20. Further, the buzzer 23 is driven to emit a sound when the alarm time comes.

Figure 17 shows the overall appearance of the transmitter / receiver of the slave station.
A calculator or card type and a wristwatch type are shown. The above-mentioned antenna 22 is provided at the upper left end of the calculator type transceiver of FIG. 17 (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 at the lower right of the display unit 20, and the three LEDs 24 are provided at the lower left of the display unit 20 ...
Is provided. Each key of the key input unit 16 has a function of inputting three kinds 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 ENT key is used to specify conversion such as the data bank mode and reservation mode shown in FIG. As shown in FIG. 17 (b), the wristwatch type has almost the same external configuration.

[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 FIGS. 14 and 15. That is, the CPU 1 increments the second register of the time memory M ₁ every time there is one second (steps A ₁ and A ₂ ), and if this second register becomes “10”,
The 10-second flag J ₀ is set, the 10-second register is incremented (steps A _{3 to} A ₅ ), and if the 10-second register becomes “6” and 60 seconds is counted, the 1-minute flag J is set. Set ₁ and increment the minute register (step A ₆ ~
A ₈ ), and if this hour and minute register also becomes “10”, the 10 minute register is incremented, and the hour, day, month, and year counts are sequentially performed (step
A ₉ , A ₁₀ ). If the second register is "10", if 10 seconds register no a carry such as "6", and the subsequent flag J _0, J ₁ excisional and minutes, increment processing of the time and the like are not performed.

This, in timing process in step A ₁ to A _10, CPU 1 if 1 minute flag J ₁ stands transmits time data at that time to a child station (step A _11, A _12). The detailed contents of the time data transmission processing at this time will be described later.

As a result, the time data of each slave station is rewritten every minute.

Next, the CPU 1 sets the code X of the slave station in the reception memory Mb to "00".
Is set as station 00, and it is determined whether or not a data presence flag F ₀ indicating the presence of transmission data is set in the transmission check memory of station 00 (steps A ₁₃ and A ₁₄ ).

Here, if the data flag F ₀ is set, the CPU 1 performs the transmission process described in detail later (step A ₁₅ ), and if it is not set, the reception process shown in FIG. 15 is performed. That is, the CPU 1 sends a P command to the slave station, inquires about the presence of transmission data (step A ₁₆ ), then transmits the slave station code X of “00” (step A ₁₇ ), and switches to the reception mode (step A ₁₆ ). ₁₈ ). Subsequently, it filed a response from the slave station S command, if there is no data to be received from the slave station "00" (step A _19), back to the transmission mode (step A _20). If the S command is not obtained and the T command is obtained and there is data to be received from the slave station “00” (step A ₂₁ ), the receiving process described in detail later is performed (step A ₂₂ ), and the T command is also obtained. if not, the slave station "00" will be in the outside of the reach of the radio waves of the master station, and sets the absence flag L to send Chietsukumemori Mc (step a _23).

Then, CPU 1 is to determine that the slave station code X is not one way process until the slave station "FF" in the "00" is completed (step A _24), the next "0 increments the slave station code X
1 "station (step A ₂₅ ) and if the 10-second flag J ₀ is set or the absence flag L is cleared (step A ₂₆ ,
A ₂₇ ), the transmission / reception processing of steps A _{14 to} A ₂₃ described above is performed by the slave station “0.
This is also performed for "1", but not performed if the 10-second flag J ₀ is cleared and the absence flag L is set.

As a result, transmission / reception processing is performed at least every 10 seconds for all slave stations, and at other times, transmission / reception processing is not performed for slave stations outside the range of radio waves.

In this way, the master station can perform time-division transmission / reception processing using the same frequency for many slave stations, and one-to-many communication can be performed bidirectionally between the master station and slave stations. In addition, even if a specific slave station is out of the radio wave range, transmission / reception is reliably performed with respect to other slave stations, and there is no delay in transmission / reception processing due to the slave station outside the radio wave range. .

<Overall Processing of Slave Station> On the other hand, the CPU 18 of the slave station constantly performs the flow processing shown in FIG. 16, and when the P command or the Q command is given from the master station (steps B ₁ and B ₃ ), the CPU 18 It is judged whether the slave station code X next to this command is the code of its own station (steps B ₂ and B ₄ ). If it is a P command for transmission permission to the master station, is the own station code, and the data present flag F ₁ is set, CPU 1
8 determines that there is a data to be transmitted to the master station (step B _5), is switched to the transmission mode, after the transmission process, and returns to receive mode (step B ₆ .about.B _8). If the data flag F ₁ is not set here, the transmission mode is set and the S command is sent (steps B ₉ and B ₁₀ ).

If the command is a Q command with transmission data from the master station and the code is the local station, 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 for the time measurement of less than a second, display processing
Setting data input from the key input unit 16, the setting processing of the mode selection such as performing (step B _12).

<Transmission / reception processing of master station> In the master station, the time data transmission processing of step A ₁₂ is the 18th.
It is performed as shown in the figure. That is, CPU1 is the receiving memory
The code X of the slave station of Mb is set to 00 stations as "00" (step C _1), Q command indicating the transmit data Yes to the child station,
"00" slave station code X, GO indicating the time setting for the slave station
The code is set (steps C _{2 to} C ₄ ), the time data from the minute in the time memory M ₁ to the year is transmitted, the 1-minute flag J ₁ is cleared (steps C ₅ and C ₆ ), and this step C ₁ to The process of C ₆ is repeated for all slave stations (steps C ₇ , C ₈ ).

In addition, in the master station, the data transmission process of step A ₁₅ is the first.
It is performed as shown in FIG. That is, the CPU 1 transmits a Q command indicating that there is transmission data to the slave station and the slave station code X of the transmission destination (steps D ₁ and D ₂ ), and “0” in the transmission memory Ma is transmitted.
The data of three lines of the "0" station is transmitted to the fourth memory of the transmission memory.
After the third and subsequent lines are shifted by 3 lines (steps D ₃ and D ₄ ), if there is no remaining data, the data presence flag F ₀ with transmission data is cleared (steps D ₅ and D ₆ ), and if there is remaining data The data presence flag F ₀ is left set.

Further, the reception process of the master station in step A ₂₂ is performed as shown in FIG. That is, if the received mode code is, for example, an A1 code indicating a request for the setting status of the data bank memory M ₂ , the CPU 1 causes the transmission memory Ma to store and set the A 2 code indicating the transmission of the setting content in Ma ₁ and data. The current settings of the bank memory M ₂ can be changed to Ma ₂
To the slave station and prepare for transmission to the slave station by setting a data presence flag F ₀ indicating that transmission data is present (steps E _{1 to} E ₃ ).

Further, for example, if the reception code is an A3 code indicating the transmission of the correction and setting contents, the contents of the data bank memory M ₂ are corrected or set based on the data given from the slave station, and the correction and setting are accepted. and A4 code indicating the completion, and transfers the correction of data bank memory M _2, the content after setting the Ma _1, leaving the transmission preparation to the child station make a data present flag F ₀ indicating the transmission data Available ( Steps E _{4 to} E ₇ ).

In addition, the receiving code is B1 indicating the date transmission for booking
If it is a code, it indicates the transmission of the reservation status to the transmission memory Ma.
The B2 code and the content of the reservation status of the day in the reservation memory M are transferred, and similarly, the data existence flag F ₀ indicating the existence of the transmission data is set (steps E _{8 to} E ₁₀ ).

If the reception code is a B3 code indicating reservation content transmission,
The reservation content of the reservation memory M ₃ is updated based on the reservation given from the slave station, the B4 code indicating the completion of reservation and the content of the reservation status after the update of the reservation memory M ₃ are transferred to the transmission memory Ma,
Similarly, a data presence flag F ₀ indicating the presence of transmission data is set (steps E _{11 to} E ₁₄ ).

If the reception code is the destination, the C1 code indicating the message transmission, the C2 code indicating the message transmission and the message data are transferred to the area of the slave station corresponding to the destination of the transmission memory Ma, and similarly the flag F _{0 is} transmitted. Stand (Step E ₁₅
~ E ₁₇ ).

If the reception code is the E1 code indicating the transmission of the English word, the corresponding Japanese translation word read from the word memory M ₄ and the E2 code indicating the transmission of the Japanese translation word are transferred, and the flag F ₀ is similarly set (step E ₁₈ ~ E ₂₀ ). Similar processing is performed when other codes are transmitted in this way, and the processing is as shown in the search mode (2), the conversation mode, and the game mode in FIG.

<Slave Station Reception Process> The slave station step B ₁₁ reception process at the slave station is performed as shown in FIG. That is, if the reception code is a GO code indicating the time setting to the slave station, the CPU 18 stores the time data given from the master station in the data memory M ₁₂ time register section and clears the seconds or less of the slave station. , 0 to start counting (steps F ₁ and F ₂ ).

If the reception code is an A2 code indicating the setting content transmission,
The setting contents sent from the master station are set in the data memory M ₁₂ and displayed on the display unit 20 (steps F ₃ and F ₄ ).

If the received code is an A4 code indicating completion of correction and acceptance of setting contents, the correction and setting data input from the key input unit 16 is set in the data memory M ₁₂ and displayed on the display unit 20.

Similar processing is performed for other codes.

<Specific use of transmission / reception processing> FIGS. 23 to 28 show changes in the display unit 20 of the slave station.
FIG. 23 shows the display state of the slave station code “A3” in the normal mode, in which the date, the day of the week, and the time are displayed.

If the ENT key in the key input section 16 of the slave station is operated in this state, the mode switches to the data bank mode shown in Fig. 4 and the display of "DATA BANK" is displayed as shown in Fig. 24 (a). Becomes When operating the "?" Key, the operation is processed at step B ₁₂ of FIG. 16, with a flag is set in the flag portion of the A1 of the memory M _11, a flag is set to F _1. Then, when the P command and the own station code are given from the parent station (steps B ₁ and B _{2 in} FIG. 16), the A 1 code is sent to the parent station by steps B _{5 to} B ₇ . The code and will be sent. This A1 code is processed in the master station by the steps E _{1 to} E _{3 in} FIG. 20, and the steps D _{1 to} D ₆ in FIG.
In addition, as shown in FIG. 24 (b), the first name and telephone number are displayed after being processed by the processes of F ₂ and F _{3 in} FIG. 21, and when the “?” Key is operated thereafter, FIG. 2 as shown in c)
The second name and phone number are displayed. Also, if you enter new data for the company name and phone number, the memory M ₁₁ , M
₁₂ together is flagged A3 and F ₁ of, are displayed on the display unit 20 as shown in FIG. 24 (d), the new data and A3 code described above, by connexion master station to the step B ₅ .about.B ₇ is sent to, the step _{E 4 ~E 7, D 1 ~D} 6, F 5, the master station of F _6, is processed by the transmission and reception processing of the slave station, the data bank memory of the master station
M _{2 set} . This data can be viewed arbitrarily by the operation described above.

Next, when you want to know the reservation status of the conference room, enter (EN
Operate the T) key again to enter the reservation mode. For example, to see the reservation contents for each room on April 2, 1985, enter the date data. As a result, the date is displayed as shown in FIG. 25 (a) and the code memory M ₁₁
B1 flag is set. By step B ₅ .about.B _7,
B1 code and date data described above is sent to the master station, said step E ₈ ~E _10, D ₁ ~D master station, such as _6, is processed by the transmission and reception processing of the slave station, shown in Figure 25 (b) The reservation status of each room is displayed.

On the other hand, if you want to make a reservation for x room from 8:00 to 10:00, enter it by key. Then, in the same way as above B3
The code and the data of the reservation contents are displayed in steps E _{11 to} E ₁₄ above.
D ₁ to D master station, such as _6, sent by the transmission and reception processing of the slave station, the slave station code "A3" where reserved as shown in Figure 25 (c) is excisional. In the case of cancel, for example, in the z room
When it is desired to cancel the reservation from 12:00 to 3:00, the same key input may be performed, and similarly, the cancellation is performed as shown in FIG. 25 (d).

Then press the ENT key again to enter message mode. For example, for the slave stations “OC” “C4” “F1”,
To send a message stating that a meeting will be held in Room 103 from 11:00 am on May 12, just key in the message. Then, the above C1 code and message contents are
E ₁₅ to E _17, sent by the transmission and reception processing such as D ₁ to D _6, transmission memory
The C2 code and message contents are set in the area of the "OC", "C4", and "F1" slave stations of Ma, and transmitted when each slave station is designated.

Next, to enter the conversation (communications) mode by operating the enter key and talk to the slave station "FE", click "TO:" F
You just have to key in "E". Then, as shown in Fig. 27 (a), the display is performed, the H1 code and the slave station code "FE" are sent to the master station, and the master station sends it to the other party's slave station "FE" and from the "A3" station. There is a conversation application, inquiry data is sent as to whether or not conversation is possible, and it is displayed on the "FE" station as shown in FIG. 27 (b). If the reply from the “FE” station is that the user is allowed to talk, the master station will notify the “A3” station to that effect.
27 Convey as shown in Figure (c). On the other hand, the "A3" station, for example, inputs a concrete conversation content by a key as shown in FIG. 25 (d) and sends it to the other party's "FE" station. After that, the same processing is repeated, and conversation is performed.

<Transmission / reception speed> In this embodiment, the transmission / reception processing is performed at a speed of 19200 bits / second. Therefore, even if one code has a total of 10 bits including 1 bit before and after, the inquiry for each slave station is P
Command, S command, slave station code is 10 + 10 + 10 = 30 bits, and the time required for inquiries to all slave stations is It's done. Even if 100 bit data is transmitted / received to / from all the slave stations (although this cannot happen), even if the BCC code and R command are taken into consideration, It is sufficient and can be used as a transmitting and receiving device.

〔The invention's effect〕

As described above, according to the present invention, the master station transmits the transmission permission code and the slave station identification code to each slave station, and the slave station designated by the identification code transmits the slave station information to the master station by radio wave. Therefore, the time-division processing enables bidirectional one-to-many communication between the master station and the slave stations. In addition, even when transmitting and receiving between the slave stations, transmission and reception are also performed between other slave stations. It is possible to perform transmission / reception at the same frequency among a large number of slave stations at a time, and since transmission / reception is performed by time division, the above-mentioned one-to-many or a large number of slave stations can be connected without a special circuit. It can be processed and has a simple circuit configuration.It also determines whether or not there is information to be transmitted from the master station to the slave station, and the determined information is transmitted from the master station to the slave station by radio waves. Even if the station is out of range of the radio wave, Also it is not possible to make a call many times, prevents arises that summer can not send and receive to other slave stations, smooth the effects of the like can be transmitted and received.

[Brief description of drawings]

1 and 2 are overall circuit diagrams of a master station and a slave station, FIGS. 3 and 4 are diagrams showing types of commands and mode codes, and FIGS. 5 to 13 are a master station and a slave station. Various memories in the CPU1, RAM3, 19 are shown. Figures 14 to 16 and 18 to 21 are flow charts of transmission / reception processing of the master station and slave stations, and Figure 17 is an external view of the slave station. FIG. 22 is a diagram showing a pattern of transmitted / received data,
FIG. 23 to FIG. 27 are diagrams showing the changing state of the display unit 20 of the slave station. 1, 18 ... CPU, 3, 19 ... RAM, 4, 21 ... Transceiver circuit, 11, 22 ... Antenna, 16 ... Key input section, 20 ... Display section, Ma ... Transmission memory, Mb ... … Receive memory, Mc …… Send check memory, M ₁ …… Time memory, M ₂ …… Data bank memory, M ₃ …… Reserved memory, M ₄ …… Word memory, M ₅
...... Address and name memory, M ₁₁ …… Code memory, M ₁₂ …… Data memory.

Claims (1)

[Claims] 1. A master station comprising a transmitter / receiver and sequentially transmitting a transmission permission code and a slave station identification code to a plurality of slave stations at different transmission timings, and the transmission permission code and its own slave station from each master station. A wireless communication system comprising the plurality of slave stations that transmits information to the master station when an identification code is received, and each of the plurality of slave stations sends a slave station identification code and a message of a destination to be transmitted. A setting means for setting is provided, and when the transmission permission code and its own slave station identification code are received from the master station, the slave station identification code and message data of the destination set by the setting means are transmitted to the master station. However, the master station is provided with a memory corresponding to each of the plurality of slave stations, and when the slave station identification code and message data of the destination are sent from the slave station that has given the transmission permission code, The message data is stored in a memory corresponding to the destination slave station, and the message data is transmitted when the transmission permission code and the slave station identification code are transmitted to the destination slave station. Formula method.