JP3674436B2 - Duplicate signal discrimination method and relay transmission system employing duplicate signal discrimination method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless transmitter for transmitting a wireless signal including a predetermined control command, a wireless relay for receiving and relaying the wire signal, and a wireless for receiving the wireless signal and performing a predetermined process. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duplicate signal discrimination method for not performing duplicate signal reception processing in a relay transmission system including a receiver, and a transmission / reception system employing this method.
[0002]
[Prior art]
In a conventional wireless call system such as a restaurant, a service call receiver and a wireless call receiver perform reception processing on all received signals. Therefore, when a repeater is used to expand the usable area of the service call system and the wireless call system, reception processing is performed for both the signal transmitted directly from the transmitter and the signal relayed by the repeater. The
[0003]
For this reason, if a plurality of repeaters are used, the load applied to each receiver and each repeater increases, and the efficiency of the entire system deteriorates.
[0004]
For such a problem, in a wireless transmission system including a repeater, by providing a unique identification number for each signal in the transmission format, when signals with the same identification number are received in duplicate, Only a received signal is processed, and a signal received later is not processed.
[0005]
In addition, there is a system that employs a method in which a signal from the same transmitter is not received until a predetermined time elapses after the receiving process.
[0006]
[Problems to be solved by the invention]
However, in the former, a service call receiver or wireless call receiver that does not have a signal identification number in the transmission format cannot determine a duplicate signal by the above method. In addition, there is also a request for the latter to be received while a predetermined time elapses.
[0007]
The present invention has been made in view of such circumstances, and in the transmission format of the received signal, a code representing the number of times of relaying and a unique code for each device representing the transmitter or repeater that transmitted the signal It is a first object of the present invention to provide a duplicate signal discriminating method for determining whether or not the same data has been received by providing both or one of them and comparing the received history data with the received history data.
[0008]
The second object is to provide a system that employs the above method.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the duplicate signal discrimination method according to claims 1 to 3 of the present invention, the wireless signal is configured to include at least an ID code and control data including relay information. When the wireless receiver receives another wireless signal while holding the received wireless signal as history data for a predetermined time, the wireless receiver holds the history data and the relay information included in the received wireless signal. Are compared to determine whether or not to perform reception processing.
[0010]
The overlap signal determination method of claim 1, the relay information, each relay processing by the wireless relay is performed, and the number of relays code is counted up.
[0011]
The overlap signal discrimination method according to claim 2, relay information, and the relay device code defined in advance relay outgoing time according to the wireless repeater.
[0012]
In the duplicate signal discrimination method according to claim 3 , the relay information is preliminarily defined in accordance with the relay repeater code according to the relay repeat count code and the wireless repeater that are counted up every time relay processing is performed by the wireless repeater. including a relay device code are also of the.
[0013]
In the duplicate signal determination method according to claim 4 , each time the wireless receiver receives the wireless signal, the wireless receiver compares the wireless signal with the wireless history data, and the relay number code included in the received wireless signal includes the history code. The reception process is performed only when it is the same as the relay count code included in the data.
[0014]
In the duplicate signal determination method according to claim 5 , each time the wireless receiver receives the wireless signal, the wireless receiver compares the wireless signal with the wireless history data, and the relay number code included in the received wireless signal is a history. The reception process is performed only when it is equal to or smaller than the relay count code included in the data.
[0015]
In the duplicate signal determination method according to claim 6 , the wireless repeater is set in advance with the relay transmission time corresponding to the relay device code as a priority, and the wireless receiver receives the wireless signal each time, The wireless signal is compared with the wireless history data, and if the relay device code included in the received wireless signal has a lower priority than the relay device code included in the history data, reception processing is prohibited. And
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
FIG. 1 is an example of a system configuration diagram of a system that employs the duplicate signal discrimination method of the present invention. In the figure, 1 is a variable display type wireless receiver that displays an order number or the like at a restaurant, 2 is a wireless repeater that relays a signal from each wireless transmitter and transmits it to the receiver, and 3 is a push button that receives a call signal. Desktop transmitter for transmission, 4 is also a wall-mounted transmitter, 5 is a centralized transmitter that has a plurality of push buttons and transmits a call signal corresponding to each push button, 6 is a number displayed on the display receiver, etc. Is a centralized erasing transmitter, and 7 is a hot wire sensor transmitter that transmits a calling signal by sensor detection.
[0018]
2 and 3 are block diagrams showing the internal configurations of the receiver 1 and the repeater 2, respectively.
[0019]
In FIG. 2, 10 is a CPU for controlling each part of the display receiver 1, 11 is a wireless receiver for receiving a signal from the transmitter 3 or the repeater 2, and 12 is ID information for storing registration data such as a transmitter ID. A storage unit, 13 is a power supply unit, 14 is a SW input unit for turning on / off the power, 15 is a display unit configured to display a caller and the like and is configured by a plurality of display windows, and 16 is notified of reception by sound It is a sounding part for.
[0020]
When the wireless receiver 11 of the display receiver 1 receives the calling signal, the CPU 10 determines whether or not the received signal has been received. If the received signal has not been received, the CPU 10 performs the following reception processing. No reception processing is performed.
[0021]
In the reception process, the CPU 10 searches for whether the received signal matches the transmitter ID registered in the ID information storage unit 12, and if there is a match, the number corresponding to the call signal Is displayed on the display unit 15, and a ringing tone is output by the sounding unit 16.
[0022]
In FIG. 3, 20 is a CPU that controls the repeater 2, 21 is a wireless transmission / reception unit that transmits and receives signals, 22 is an ID information storage unit, 23 is a power supply unit, 24 is a SW input unit, and 25 is a display unit. . The CPU 20 searches whether there is a signal that matches the transmitter ID registered in the ID information storage unit 22, and if there is a signal that matches, transmits the received signal as it is.
[0023]
When the radio transmitter / receiver 21 receives the calling signal, the repeater 2 determines whether the received signal has been received. If not, the CPU 20 performs reception processing and transmission processing. For example, reception processing is not performed.
[0024]
FIG. 4 is a block diagram showing an internal configuration of a transmitter that transmits a signal to a receiver or a repeater. In the figure, 30 is a CPU that controls the transmitter 3, 31 is a wireless transmission unit that transmits signals, 32 is an ID information storage unit, 33 is a battery, 34 is an SW input unit, and 35 is a display unit. When the SW input unit 34 is operated, control data, ID, transmission data, etc., which will be described later, are transmitted as one signal.
[0025]
Here, the duplicate signal discrimination method will be briefly described.
[0026]
In order to realize the duplicate signal discrimination method of the present invention, the transmitter 3, the repeater 2, and the receiver 1 have the following roles in the system.
[0027]
The transmitter 3 sets the data of the transmitter itself (to be described later) in the relay information used in the signal so that the repeater 2 and the receiver 1 do not perform the duplicate signal reception process, and transmits the signal. The relay information includes a relay count code that is counted up each time relay processing is performed by the repeater, and a relay device code that defines a relay transmission time in advance according to the repeater.
[0028]
Further, the repeater 2 that has received this signal determines the overlap by comparing these codes in the signal with the codes in the history data stored in the repeater 2 and receives if the signal is not duplicated. These codes in the received signal are rewritten to the code of the repeater itself and transmitted.
[0029]
The receiver 1 that has received the signal from the transmitter 3 or the repeater 2 determines the overlap by comparing these codes in the signal with the codes in the history data stored in the receiver 1.
[0030]
The roles of the transmitter 3, the repeater 2, and the receiver 1 are collectively referred to as a duplicate signal discrimination method.
[0031]
Next, the call signal data including the relay device code / relay count code used for the duplication determination by the duplication signal discrimination method will be described with reference to the transmission format of FIG.
[0032]
As shown in FIG. 5A, the call signal is composed of control data, ID, transmission data, and the like. The ID represents the ID of the transmitter of the same type, and the transmission data includes information such as the type of the centralized transmitter and the operated button number.
[0033]
FIG. 5B is a diagram illustrating a bit configuration of control data. Both the relay count code and the relay device code are composed of 2 bits. The relay count code indicates that the code value is “00” and no relay is performed, “01” indicates relay once, “10” indicates relay twice, and relay device The code indicates a transmitter with a code value “00”, a repeater 1 with “01”, and a repeater 2 with “10”.
[0034]
Next, “received history data” stored for determining whether or not the signal has been received by the duplicate signal determination method will be described. The structure of the history data is shown in FIG.
[0035]
One piece of history data H includes control data, ID, and transmission data in the reception data described in the transmission format, and further has a data expiration time timer value. The control data or the like is stored as history data without processing the received data for which the reception process has been completed.
[0036]
The data expiration time timer value means that the data is valid if the value is greater than 0, and that the data is invalid if the value is 0. When the data is stored after the reception process is completed, the maximum value is set, and the value is determined by the maximum relay processing time. Thereafter, as time elapses, the value is subtracted until the timer value becomes 0. When the timer value becomes 0, the history data is deleted. Alternatively, the timer value may be left as invalid data with zero.
[0037]
In the following, three types of discrimination method embodiments, which are examples of the duplicate signal discrimination method of the present invention, will be described with reference to a call signal flowchart and a processing flowchart.
[0038]
First, a method for discriminating duplicate signals by comparing the number of relay codes will be described with reference to FIGS. FIG. 7 is a diagram illustrating a flow of signals transmitted from a transmitter in a system including a transmitter, a display receiver, and two repeaters. This duplicate signal discrimination method can be effectively used in a serial transmission system as shown in FIG. Of course, it can also be used in a system that does not include a repeater.
[0039]
In the figure, CC is a relay number code. (1) The repeater 2 that has received the signal (1) from the transmitter 3 adds 1 to the relay number code CC of the received signal and performs relay transmission. ) The repeater 2 'that has received the signal (2) performs relay transmission by adding 1 to the relay frequency code CC of the received signal, and the display receiver 1 that has received the signal (3) (3) The signal reception process (3) is performed. The repeater 2 that has received the signal (4) (3) determines that the signal (3) is a duplicate signal, and the signal is discarded.
[0040]
The process for realizing the duplicate signal discrimination is shown in the flowchart of FIG. If there is history data in which the ID and transmission data of the received signal match, it is determined that the signals are from the same transmitter, and duplication is checked. If there is no matching history data, new history data is stored and reception processing is performed. The duplication check is performed by comparing the number of relay times of the received signal and the history data. If the received signal relay count code is large, it is determined that there is duplication, and reception processing is not performed . In other cases, the history data is overwritten and updated with the initialized expiration timer value and reception signal data, and reception processing is performed. (See 101 to 105 in FIG. 8).
[0041]
Second, a method of discriminating duplicate signals by comparing relay device codes will be described with reference to FIGS. FIG. 9 is a diagram illustrating a flow of signals transmitted from a transmitter in a system including a transmitter, a display receiver, and two repeaters. This duplicate signal discrimination method can be effectively used in a parallel transmission system as shown in this figure. Of course, the present invention can also be used in a system that does not include a repeater or a system that includes only one repeater.
[0042]
In the figure, RPC is a relay device code. (1) The relay device 2 that has received the signal (1) from the transmitter 3 performs relay transmission by replacing the relay device code RPC of the received signal with its own relay device code. Also, (2) the repeater 2 'that has received the signal (1) from the transmitter performs relay transmission by replacing the relay device code RPC of the received signal with its own relay device code.
[0043]
Next, (3) the two repeaters receive the signal from the transmitter almost simultaneously, but the repeater 2 relays and transmits earlier than the repeater 2 ′ (the repeater 2 is more than the repeater 2 ′). (2) is received earlier than (3). (4) When the display receiver 1 receives the signal (2), it performs reception processing. (5) When the display receiver 1 receives the signal (3), the signal (3) is a duplicate signal. And the signal is discarded. (6) The repeater 2, 2 'determines that the signal (2) or (3) is duplicated, and the signal is discarded.
[0044]
As described in (3) above, in order for the repeater 2 'to perform relay transmission later than the repeater 2, the repeater 2' is set to transmit after delaying a predetermined time after receiving the signal. . In this way, the priority order is determined in advance by specifying the relay transmission time for each repeater.
[0045]
The process for realizing the duplicate signal discrimination is shown in the flowchart of FIG. If there is history data in which the ID and transmission data of the received signal match, it is determined that the signals are from the same transmitter, and duplication is checked. If there is no matching history data, new history data is stored and reception processing is performed. The duplication check is performed by comparing the relay device codes of the received signal and the history data. When the relay device code of the received signal is large, it is determined that it is duplicated, and reception processing is not performed. In other cases, the history data is overwritten and updated with the initialized expiration timer value and received signal data, and reception processing is performed. (See 201 to 205 in FIG. 10).
[0046]
Third, a method for discriminating duplicate signals by comparing each of the relay frequency code and the relay device code will be described with reference to FIGS. FIG. 11 is a process flowchart for realizing this overlapping signal discrimination.
[0047]
If there is history data in which the ID and transmission data of the received signal match, it is determined that the signals are from the same transmitter, and duplication is checked. If there is no matching history data, new history data is stored and reception processing is performed. The duplication check is performed by comparing the relay frequency code and the relay device code of the received signal and the history data. If the received signal relay count code is large or the received signal relay device code is large, it is determined that there is duplication, and reception processing is not performed. In other cases, the initialized expiration timer value and received signal data are initialized. Then, the history data is overwritten and updated and the reception process is performed (see 301 to 306 in FIG. 11).
[0048]
In the flowchart of FIG. 11, the relay frequency code is compared first and then the relay device code is compared, but the comparison order may be reversed.
[0049]
By using this method, it is possible to eliminate duplicate signals in any of the system configurations shown in FIGS.
[0050]
FIG. 12 is a diagram illustrating a flow of signals transmitted from a transmitter in a system including a transmitter, a display receiver, and two repeaters. However, one of the repeaters is in an area where it cannot communicate with the transmitter.
[0051]
In the figure, CC and RPC are a relay number code and a relay device code, respectively. (1) The relay 2 that has received the signal (1) from the transmitter 3 adds 1 to the relay number code CC of the received signal, Further, the relay device code RPC is replaced with its own relay device code and relay transmission is performed, and the display receiver 1 receiving the signal (2) (2) performs the signal reception processing (2).
[0052]
Next, (3) the repeater 2 ′ having received the signal (2) adds 1 to the relay count code CC of the received signal, and further performs relay transmission by replacing the relay device code RPC with its own relay device code. Furthermore, the display receiver 1 that has received the signal (4) (3) determines that the signal (3) is a duplicate signal because the relay count code CC (3) is larger than the relay count code of the history data. The signal is discarded. Also, the repeater 2 that has received the signal of (5) (3) also determines that the signal of (3) is a duplicate signal because the relay count code CC of (3) is larger than the relay count code of history data, The signal is discarded.
[0053]
Also in the system configuration shown in FIG. 13, it is possible to discriminate duplicate signals by the same method. FIG. 13 is a diagram illustrating a flow of signals transmitted from a transmitter in a system including a transmitter, a display receiver, and two repeaters. In this case, unlike the case of FIG. 12, both repeaters are in a state where they can communicate with the transmitter.
[0054]
In the figure, CC and RPC are respectively a relay number code and a relay device code. (1) The relay 2 that has received the signal (1) from the transmitter 3 adds 1 to the relay number code CC of the received signal, The relay device code RPC of the received signal is relayed instead of its own relay device code, and (2) the repeater 2 'that received the signal (1) from the transmitter receives the relay frequency code CC of the received signal. 1 is added, and relay transmission is performed by replacing the relay device code RPC of the received signal with its own relay device code.
[0055]
Next, (3) the two repeaters receive the signal from the transmitter almost simultaneously, but the repeater 2 is configured to relay and transmit faster than the repeater 2 '. Is received earlier than (3). (4) When the display receiver 1 receives the signal (2), it performs reception processing. (5) The display receiver 1 that receives the signal (3) has a history of the relay device code RPC of (3). Since it is larger than the data relay device code, it is determined that the signal (3) is a duplicate signal, and the signal is discarded. (6) The repeaters 2, 2 'that have received the signal (2) or (3) determine that each signal is a duplicate, and the signals are discarded.
[0056]
In this way, if the method of comparing both the relay count code and the relay device code is adopted, the system shown in FIG. 12 can detect the duplicate signal by comparing the relay count code, and the system shown in FIG. In, duplicate signals can be detected by comparing relay device codes. That is, it can be used in both a system (see FIG. 7) to which the duplicate signal discrimination method based on the relay number code is applied and a system (see FIG. 9) to which the duplicate signal discrimination method based on the relay device code is applied.
[0057]
【The invention's effect】
As can be understood from the above description, in the duplicate signal determination method according to the present invention, even during the relay processing time, that is, while the history data is held, the relay information (relay count code and relay device code) This is possible when it is determined that the received signal needs to be received by comparison.
[0058]
That is, when signals are transmitted continuously from the transmitter, the second signal can be processed normally even within the relay processing time of the first signal, and is generated for each signal. It is possible to prevent the duplicate signal to be received.
[0059]
In addition, after the relay processing time elapses, reception processing can be performed unconditionally without performing duplicate signal discrimination based on the relay frequency code or the like.
[0060]
6. The duplicate signal discrimination method according to claim 1, 4 or 5 , wherein the receiver performs the duplicate signal reception process by a simple method of comparing the relay number code provided in the signal and the relay number code in the history data. I don't have to. Further, if this repeat count code is used, even if a plurality of repeaters are installed in the same system, a duplicate signal can be determined without being aware of the repeater type.
[0061]
In particular, in claims 4 and 5 , if the received signal relay count code is larger than the history data relay count code within the relay processing time, it is determined that the received signal is duplicated. Thus, only a legitimate signal can be received and processed.
[0062]
In Claims 2 and 6 , by installing a plurality of repeaters in the same system and setting the relay device code of the repeater in each device, the repeaters can communicate with each other, and each repeater and receiver Even when communication becomes possible, it is possible to determine a duplicate signal.
[0063]
In particular, in claim 6 , when the relay device code of the received signal is larger than the relay device code of the history data within the relay processing time, it is determined that the received signal is duplicated, so the duplicate signal is excluded. In addition, it is possible to receive only a signal that has passed through a repeater with a high priority.
[0064]
According to the third aspect , it is possible to determine a duplicate signal regardless of the installation location of the repeater. Also, if it is within the relay processing time and the received signal relay count code is greater than the history data relay count code, or if the received signal relay device code is greater than the history data relay device code Since it is determined that the signals are duplicates, only normal signals can be received and processed.
[0065]
According to the seventh aspect of the present invention, it is possible to provide a transmission / reception system that employs any one of the duplicate signal discrimination methods described above.
[0066]
In addition, any one of the above-described duplicate signal determination methods can be applied to a transmission / reception system that does not include a repeater.
[Brief description of the drawings]
FIG. 1 is an example of a system configuration diagram of a system that employs a duplicate signal discrimination method of the present invention.
FIG. 2 is a block diagram showing an internal configuration of a receiver employing the duplicate signal discrimination method of the present invention.
FIG. 3 is a block diagram showing an internal configuration of a repeater employing the duplicate signal discrimination method of the present invention.
FIG. 4 is a block diagram showing an internal configuration of a transmitter that employs the duplicate signal discrimination method of the present invention.
FIG. 5 is a diagram illustrating a transmission format of call signal data including a relay device code and a relay count code.
FIG. 6 is a diagram showing an internal configuration of history data.
FIG. 7 is a diagram showing a signal flow from a transmitter to a receiver in an example of a system that employs a duplicate signal discrimination method based on a relay frequency code comparison.
FIG. 8 is a flowchart showing an example of a basic operation when a signal is received in an example of a system that employs a duplicate signal discrimination method based on a relay frequency code comparison.
FIG. 9 is a diagram illustrating a signal flow from a transmitter to a receiver in an example of a system that employs a duplicate signal determination method based on relay device code comparison;
FIG. 10 is a flowchart illustrating an example of a basic operation when a signal is received in an example of a system that employs a duplicate signal determination method based on relay device code comparison;
FIG. 11 is a flowchart illustrating an example of a basic operation when a signal is received in an example of a system that employs a duplicate signal determination method based on a comparison of both the relay frequency code and the relay device code.
FIG. 12 is a diagram illustrating a signal flow from a transmitter to a receiver in an example of a system that employs a duplicate signal discrimination method based on comparison of both the relay frequency code and the relay device code.
FIG. 13 is a diagram showing a signal flow from a transmitter to a receiver in an example of another system that employs a duplicate signal discrimination method based on comparison of both the relay frequency code and the relay device code.
[Explanation of symbols]
1 Wireless receiver 2 Wireless repeater 3 Wireless transmitter H History data CC Relay count code RPC Relay device code

Claims (7)

A wireless transmitter that transmits a wireless signal including a predetermined control command, a wireless relay that receives and relays the wire signal, and a wireless receiver that receives the wireless signal and performs predetermined processing In the relay transmission system provided,
The wireless signal is configured to include at least an ID code and control data including relay information. The relay information is used as a relay count code that is counted up each time relay processing is performed by the wireless repeater. ,
When the wireless receiver receives another wireless signal while holding the received wireless signal as history data for a predetermined time, the wireless receiver holds the history data and relay information included in the received wireless signal. And determining whether or not to perform reception processing, and determining a duplicate signal in a relay transmission system. A wireless transmitter that transmits a wireless signal including a predetermined control command, a wireless relay that receives and relays the wire signal, and a wireless receiver that receives the wireless signal and performs predetermined processing In the relay transmission system provided,
The wireless signal is configured to include at least an ID code and control data including relay information, and the relay information is a relay device code that defines a relay transmission time in advance according to the wireless relay,
When the wireless receiver receives another wireless signal while holding the received wireless signal as history data for a predetermined time, the wireless receiver holds the history data and relay information included in the received wireless signal. And determining whether or not to perform reception processing, and determining a duplicate signal in a relay transmission system. A wireless transmitter that transmits a wireless signal including a predetermined control command, a wireless relay that receives and relays the wire signal, and a wireless receiver that receives the wireless signal and performs predetermined processing In the relay transmission system provided,
The wireless signal is configured to include at least an ID code and control data including relay information, and the relay information is counted as a relay count code that is counted up each time relay processing is performed by the wireless relay. , Including the relay device code that prescribes the relay transmission time according to the wireless repeater,
When the wireless receiver receives another wireless signal while holding the received wireless signal as history data for a predetermined time, the wireless receiver holds the history data and relay information included in the received wireless signal. And determining whether or not to perform reception processing, and determining a duplicate signal in a relay transmission system. In claim 1 ,
Whenever the wireless receiver receives a wireless signal, the wireless receiver compares the wireless signal with wireless history data, and only when the relay count code included in the received wireless signal is the same as the relay count code included in the history data. A duplicate signal discrimination method in a relay transmission system, wherein reception processing is performed . In claim 1 ,
Each time the wireless receiver receives a wireless signal, the wireless signal is compared with wireless history data, and the relay number code included in the received wireless signal is the same as the relay number code included in the history data. A duplicate signal discrimination method in a relay transmission system, wherein a reception process is performed only when it is smaller than that . In claim 2 ,
In the wireless repeater, the relay transmission time corresponding to the relay device code is set as a priority in advance,
Each time the wireless receiver receives a wireless signal, the wireless receiver compares the wireless signal with the wireless history data, and the relay device code included in the received wireless signal has a higher priority than the relay device code included in the history data. When the signal is low, the duplicate signal discrimination method in the relay transmission system is characterized by prohibiting reception processing. The transmission / reception system which employ | adopts the duplication signal discrimination | determination method in any one of Claims 1-6 .

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