WO2015129659A1

WO2015129659A1 - Transport module, information-transport-network system, information-transport method, and information-transport program

Info

Publication number: WO2015129659A1
Application number: PCT/JP2015/055135
Authority: WO
Inventors: 亮太山田; 祐輔山地; 創梅木
Original assignee: オムロン株式会社
Priority date: 2014-02-28
Filing date: 2015-02-24
Publication date: 2015-09-03
Also published as: JP2015164261A

Abstract

In this transport module, whereby prescribed transmission information to be processed by an information-processing device is transported along a prescribed transport path that includes said information-processing device, upon detection of a changed transmission state in which the prescribed transmission information is being transmitted from an originating module to a destination module in accordance with prescribed transmission parameters that have been changed in whole or in part, restoration transmission information is transmitted to the originating module, which, having received said restoration transmission information, is made to retransmit the prescribed transmission information in accordance with the pre-change prescribed transmission parameters. This minimizes the degree to which the load on an information-transport network or a transport module belonging thereto increases when transmission parameters are changed.

Description

Transmission module, information transmission network system, information transmission method, information transmission program

The present invention relates to a transmission module that transmits information related to an information processing apparatus along a predetermined transmission path including the information processing apparatus, and a network system including the transmission module and the information processing apparatus.

Conventionally, by using a sensor module that measures environmental parameters such as temperature and humidity, and transmitting the measured information to an information processing device via a network, a large amount of measurement data can be easily collected. Technologies that enable it are being developed. In this case, the wireless function for transmitting the measured information is formed by providing the sensor module with a wireless function. Here, regarding a wireless network, for example, in Patent Document 1, when a communication failure occurs in an ad hoc wireless network, a base station receives a communication parameter change request issued from a wireless terminal, and the base station receives a communication path of the network. A technique for transmitting communication parameters for constructing a new communication path to each terminal by aggregating information is disclosed. In this way, the base station grasps the entire network, so that communication parameters that do not affect the entire system are set.

JP 2012-147090 A

In a network in which information to be transmitted is transmitted to a destination via a plurality of transmission modules, from the viewpoint of information collection, if a communication failure occurs between transmission modules included in the network, the failure section is determined until then. Since the information collected via the route will not reach the destination, prompt recovery from communication failures is required. Therefore, as in the prior art, when a base station placed in a position to manage the network issues a request for recovery to each terminal and tries to perform recovery based on the response, it grasps the communication status of the entire network. The above-described communication path can be reconstructed.

Here, in the recovery process performed when a communication failure occurs, it is considered useful to change the transmission parameters used so far and attempt to transmit information under new transmission conditions. If the cause of the failure is temporary, continuing information transmission under new transmission conditions will continue to increase loads such as increased power consumption and traffic in the transmission module and network Therefore, it is not necessarily a preferable state. In addition, even when the transmission parameter is changed for reasons other than the occurrence of a communication failure, similarly, unless the situation in which the changed transmission parameter must be used for information transmission continues, the transmission parameter before the change There are also cases where the use of can suppress an increase in load during information transmission.

The present invention has been made in view of such problems, and it is possible to increase the load on the transmission module or the network as much as possible when the transmission parameter is changed in the transmission module belonging to the network for information transmission. The purpose is to suppress.

In the present invention, in order to solve the above-described problem, a transmission module that transmits the predetermined transmission information along a predetermined transmission path that is a network includes a transmission module and a transmission target module that also belong to the predetermined transmission path. It is configured to be able to detect changes in transmission parameters used in the transmission of information between. And when the said transmission parameter is changed, the structure which acts on a transmission source module so that the said transmission module transmits information according to the transmission parameter before a change again is employ | adopted. As a result, it is possible to suppress an increase in the load on the transmission module or the network due to the change of the transmission parameter. In the present application, “self-transmission module” is an expression used to specify a transmission module included in a network. That is, when a transmission module belonging to a network is specified as a reference, the transmission module is expressed as “self transmission module”. Also, in the information flow in the network, the transmission module located on the upstream side is expressed as “upstream transmission module” or a similar expression, and the transmission module located on the downstream side is expressed as “downstream transmission module” or a similar expression. Therefore, expressions such as “self-transmission module”, “upstream transmission module”, and “downstream transmission module” are based on the relative relationship between the transmission modules, and a specific transmission module in a predetermined transmission path is fixed. It is not something to express. Similarly, “transmission source module” and “transmission target module” do not represent a specific transmission module in a predetermined transmission path in a fixed manner. When there is no need to distinguish between “self-transmission module”, “upstream transmission module”, “downstream transmission module”, and the like, they may be simply expressed as “transmission module”.

Specifically, the present invention is a transmission module that transmits predetermined transmission information to be processed by an information processing apparatus along a predetermined transmission path including the information processing apparatus, and in the predetermined transmission path, The predetermined transmission information is transmitted according to a predetermined transmission parameter from a transmission source module located upstream to a transmission target module located immediately downstream of the transmission source module. Here, the self-transmission module transmits the predetermined transmission information from the transmission source module to the transmission target module according to the changed predetermined transmission parameter in which a part or all of the predetermined transmission parameter is changed. The detection means for detecting the change transmission state being executed, and when the change transmission state is detected by the detection means, the recovery transmission information is transmitted to the transmission source module, and the recovery transmission information is received. Transmission restoration means for causing the transmission source module to again transmit the predetermined transmission information in accordance with the predetermined transmission parameter before the change.

In a predetermined transmission path to which the transmission module according to the present invention (self-transmission module) belongs, information transmission according to a predetermined transmission parameter is performed between the transmission modules, that is, between the transmission source module and the transmission target module. That is, transmission of the predetermined transmission information from the transmission source module belonging to the predetermined transmission path to the transmission target module follows a predetermined transmission parameter that determines a transmission condition from the upstream side. This predetermined transmission parameter is included in each transmission module that transmits predetermined transmission information. As a predetermined transmission path, each transmission module functions as a transmission source module according to each predetermined transmission parameter. The predetermined transmission information is collected from each transmission module to the information processing apparatus that is the destination. Note that the predetermined transmission parameters of each transmission module need not all be the same.

The predetermined transmission path is formed by the starting point and the end point, and a transmission module located between the two points. However, in the present invention, the predetermined transmission path is limited to a specific path. There is no intention. That is, the predetermined transmission path may be a transmission path that is determined in advance, or may be a transmission path that is changed by changing a predetermined transmission parameter as will be described later. Further, the predetermined transmission information transmitted from the transmission source module is information to be processed by the information processing apparatus included in the predetermined transmission path. In the present invention, the processing form of the predetermined transmission information in the information processing apparatus is specified. It is not limited to the form.

Here, the self-transmission module detects the changed transmission state in which the transmission from the transmission source module to the transmission target module in the predetermined transmission path is executed according to the predetermined transmission parameter after the change by the detection unit. The reason why the predetermined transmission parameter in the transmission source module is changed is not limited to a specific reason. In general, when transmitting predetermined transmission information, it is designed to preferably maintain the state in which information transmission has been performed unless there is a situation that should be improved with respect to information transmission. For some reasons, certain transmission parameters must be changed. When the predetermined transmission parameter is changed in this way, there is a possibility that the load on the transmission module or the predetermined transmission path is increased as compared to before the change.

Therefore, when the changed transmission state is detected by the detection means, the transmission recovery means transmits the recovery transmission information to the transmission source module whose predetermined transmission parameter has been changed. The restoration transmission information is information including a command for causing the transmission source module that has received the transmission transmission of the predetermined transmission information according to the predetermined transmission parameter before the change again. Therefore, information transmission by the transmission source module that has received the recovery transmission information is switched from information transmission according to the predetermined transmission parameter after the change to information transmission according to the predetermined transmission parameter before the change.

As described above, when the transmission module according to the present invention detects a change in a predetermined transmission parameter used for information transmission from a transmission source module belonging to a predetermined transmission path, the transmission module receives the change transmission information from the transmission source module. On the other hand, it is configured to act to perform information transmission using a predetermined transmission parameter before the change. As a result, when the transmission source module receives the recovery transmission information, the transmission source module uses the predetermined transmission parameter before the change again, so the predetermined transmission information according to the predetermined transmission parameter before the change is changed. It is possible to resume transmission at a suitable time, and it is possible to reduce an increase in power consumption at a transmission source module due to a change in a predetermined transmission parameter and an increase in traffic on a predetermined transmission path. Become.

Here, in the transmission module, the transmission source module confirms a transmission completion state in which the predetermined transmission information transmitted from the transmission source module according to the predetermined transmission parameter is received by the transmission target module. And a part of the predetermined transmission parameter used for transmitting the predetermined transmission information that has become the transmission failure when a transmission failure in which the transmission completion state of the predetermined transmission information cannot be confirmed by the confirmation unit Alternatively, it may be configured to have retransmission means for retransmitting the predetermined transmission information in accordance with the predetermined transmission parameter after the change, which is formed by changing all. In this case, the detection means of the self-transmission module detects the changed transmission state after the predetermined transmission information is retransmitted by the retransmission means.

The transmission source module confirms the transmission completion state indicating that the predetermined transmission information transmitted from the transmission source module to the transmission target module according to the predetermined transmission parameter has reached the transmission target module by the confirmation unit. For example, the transmission completion state for the transmission target module can be confirmed using a confirmation signal (acknowledge signal) sent from the transmission target module that has received the predetermined transmission information to the transmission source module.

Here, if the transmission source module cannot confirm the transmission completion state of the predetermined transmission information by the confirmation means, it means that the purpose of information transmission has not been achieved despite the transmission of the predetermined transmission information. A transmission failure has occurred. In such a case, in the transmission source module, processing for autonomous recovery by the retransmission means is performed. That is, the retransmitting means changes a part or all of predetermined transmission parameters for determining transmission conditions from the transmission source module through interaction with other transmission modules or interaction with information processing apparatuses. It is performed as a self-internal process. Therefore, the change of the predetermined transmission parameter is executed without receiving external interference. Then, in accordance with the predetermined transmission parameter after the change, transmission of the predetermined transmission information having a transmission failure is attempted again.

In this way, when the transmission source module confirms a transmission failure, a predetermined transmission parameter change is autonomously performed within the transmission source module, which is affected by the external transmission failure occurring at that time. Therefore, the transmission state can be recovered. On the other hand, when the predetermined transmission parameter is changed by the retransmission unit in this manner, there is a possibility that power consumption at the transmission source module increases and traffic on the predetermined transmission path increases. Therefore, even when the transmission source module is formed in this way, it is extremely useful to apply the technical idea according to the present invention described above. In that case, the detection unit of the self-transmission module detects the changed transmission state after the retransmission of the predetermined transmission information by the retransmission unit, and based on the detection result, the self-transmission module It works on the source module.

Here, in the above transmission module, when the changed transmission state is detected by the detection unit, the transmission recovery unit sends the transmission source module to the transmission source module under a recovery transmission condition related to the predetermined transmission parameter before the change. Alternatively, the recovery transmission information may be transmitted, and the transmission source module that has received the recovery transmission information may again execute transmission of the predetermined transmission information according to the predetermined transmission parameter before the change. That is, when the self-transmission module works on the transmission source module, the recovery transmission information described above is transmitted under a recovery transmission condition related to a predetermined transmission parameter before the change.

The transmission condition at the time of restoration is the same condition as the transmission condition in the transmission source module determined based on the predetermined transmission parameter before the change, or the transmission module can be identified with the transmission condition from the self-transmission module. It is a transmission condition at the time of transmission of recovery transmission information to. As described above, the transmission condition when the self-transmission module works on the transmission source module is set to the same state as the transmission condition in the transmission source module determined based on the predetermined transmission parameter before the change. It becomes possible to more accurately confirm whether or not the transmission of the predetermined transmission information by the original module succeeds without causing a transmission failure through the success or failure of the transmission of the recovery transmission information. That is, when the transmission source module can receive the recovery transmission information transmitted under such a transmission condition during recovery, the transmission source module transmits the predetermined transmission information according to the predetermined transmission parameter before the change. Even if this happens, the possibility that the transmission is successful is considered to be relatively high.

Here, in the above transmission module, the following four modes can be exemplified for specific identification of the self-transmission module. This example does not limit the identification of the self-transmission module to the exemplified mode, and does not prevent the adoption of the self-transmission module according to a mode not illustrated. First, as a first aspect, the self-transmission module may correspond to the transmission target module. When the transmission failure occurs between itself and the self-transmission module, the transmission source module retransmits the predetermined transmission information to the self-transmission module according to the changed predetermined transmission parameter by the retransmission means. Formed to do. In such an aspect, the self-transmission module is in a position to receive transmission of predetermined transmission information from the transmission source module, and even if a predetermined transmission parameter is changed when a transmission failure occurs, the transmission module continues to be predetermined from the transmission source module. You will receive transmission information.

In the first aspect, in the transmission module, the changed parameter among the predetermined transmission parameters may be a parameter related to transmission intensity from the transmission source module. Then, the detection means of the self-transmission module detects the change transmission state by detecting that an average value of transmission intensity from the transmission source module regarding the predetermined transmission information for a predetermined number of times exceeds a predetermined transmission intensity. It may be formed so that it is detected. In other words, in this aspect, the transmission parameter related to the transmission strength from the transmission source module is changed to eliminate the transmission failure, thereby increasing the transmission strength. Therefore, as described above, the detection unit of the self-transmission module can detect that the changed transmission state has occurred based on the transmission intensity from the transmission source module. Here, the predetermined number of times of calculating the average value of the transmission intensity for condition detection may be set as appropriate by the user, and may be, for example, a plurality of times or once. In the latter case, each time the self-transmission module receives predetermined transmission information from the transmission source module and receives it, processing for detecting the changed transmission state is performed.

In the first aspect, the self-transmission module further includes transmission condition adjustment means for adjusting the recovery-time transmission condition based on a difference between the transmission capability of the self-transmission module and the transmission capability of the transmission source module. It may be. When the recovery transmission information is transmitted from the self-transmission module to the transmission source module, the transmission direction of the predetermined transmission information is opposite. When there is no difference in transmission capability between the self-transmission module and the transmission source module (for example, when the transmission specifications of both modules are the same), in other words, when there is symmetry with respect to the transmission capability between both modules The transmission condition when the recovered transmission information transmitted from the self-transmission module reaches the upstream transmission module can generally guarantee that the transmission of the predetermined transmission information from the transmission source module to the self-transmission module is successful. .

On the other hand, if there is no symmetry regarding the transmission capability between the two modules, even if the recovery transmission information transmitted from the self-transmission module has the transmission condition when it reaches the upstream transmission module, it is not necessarily from the transmission source module. The transmission of the predetermined transmission information to the self transmission module is not always successful. Therefore, by adjusting the transmission condition for transmitting the recovery transmission information based on the difference in transmission capability between the two modules by the transmission condition adjusting means, it becomes possible to ensure the success with a relatively high probability. .

Next, as a second aspect, when the transmission failure occurs between the transmission source module and the transmission target module, the predetermined transmission is performed so that the transmission target module is changed by the retransmission unit. A part or all of the parameters may be changed, and the predetermined transmission information may be retransmitted according to the predetermined transmission parameter after the change. The self-transmission module is a common transmission module in the predetermined transmission path before and after the predetermined transmission parameter is changed. In such an aspect, since the self-transmission module is in a position to relay the predetermined transmission information before and after the change of the predetermined transmission parameter, the self-transmission module can know the predetermined transmission parameter before the change. Therefore, the self transmission module can transmit the recovery transmission information to the transmission source module under the transmission condition at the time of recovery according to the predetermined transmission parameter before the change.

Next, as a third aspect, when the transmission failure occurs between the transmission source module and the transmission target module, the predetermined transmission is performed so that the transmission target module is changed by the retransmission unit. A part or all of the parameters may be changed, and the predetermined transmission information may be retransmitted according to the predetermined transmission parameter after the change. The self-transmission module is a transmission module that is a new transmission target module after the predetermined transmission parameter is changed. In such an aspect, the self-transmission module is in a position to relay the predetermined transmission information only after changing the predetermined transmission parameter, and therefore cannot know the predetermined transmission parameter before the change. Therefore, it is difficult for the self-transmission module to transmit the recovery transmission information to the transmission source module under the recovery transmission condition according to the predetermined transmission parameter before the change.

Here, in the above-described second and third aspects, the detection unit may detect that the changed transmission state has occurred by detecting that the transmission target module has been changed. This is an example of the timing for detecting the occurrence of the changed transmission state.

Next, as a fourth aspect, when the transmission failure occurs between the transmission source module and the transmission target module, the predetermined transmission is performed so that the retransmission target module is changed by the retransmission unit. A part or all of the parameters may be changed, and the predetermined transmission information may be retransmitted according to the predetermined transmission parameter after the change. The transmission module, which is a self-transmission module, is a transmission module that has been the transmission target module before the predetermined transmission parameter is changed. In such an aspect, the self-transmission module is in a position capable of relaying the predetermined transmission information only before the change of the predetermined transmission parameter, but can know the predetermined transmission parameter before the change. Therefore, the self-transmission module can transmit the recovery transmission information to the transmission source module under the transmission condition at the time of recovery according to the predetermined transmission parameter before the change.

Further, according to the present invention, according to a predetermined transmission parameter, from a transmission source module positioned upstream along a predetermined transmission path including an information processing device to a transmission target module positioned immediately downstream of the transmission source module, It can also be understood from the aspect of a network system configured to transmit the predetermined transmission information via a plurality of transmission modules so that the predetermined transmission information to be processed by the information processing apparatus is transmitted. In this case, at least one transmission module among the plurality of transmission modules is configured such that the transmission of the predetermined transmission information from the transmission source module to the transmission target module is changed in part or all of the predetermined transmission parameters. Detection means for detecting a changed transmission state being executed according to a predetermined transmission parameter after change, and when the changed transmission state is detected by the detection means, recovery transmission information is transmitted to the transmission source module. And a transmission recovery means for causing the transmission source module that has received the recovery transmission information to transmit the predetermined transmission information according to the predetermined transmission parameter before the change again. It should be noted that the technical idea disclosed regarding the invention of the transmission module can be applied to the invention of the information transmission network system as long as there is no technical flaw.

Further, according to the present invention, information is transmitted from a transmission source module located upstream to a transmission target module located immediately downstream of the transmission source module along a predetermined transmission path including the information processing device according to predetermined transmission parameters. The predetermined transmission information to be processed by the processing apparatus may be transmitted from the aspect of the information transmission method for transmitting the predetermined transmission information. In this case, the method executes transmission of the predetermined transmission information from the transmission source module to the transmission target module according to the changed predetermined transmission parameter in which a part or all of the predetermined transmission parameter is changed. A detection step for detecting a changed transmission state, and when the changed transmission state is detected in the detection step, the transmission for transmitting the recovery transmission information to the transmission source module and the transmission for receiving the recovery transmission information A transmission recovery step of causing the original module to execute transmission of the predetermined transmission information according to the predetermined transmission parameter before the change again. It should be noted that the technical idea disclosed regarding the invention of the transmission module can be applied to the invention of the information transmission method as long as there is no technical flaw.

Further, according to the present invention, in accordance with a predetermined transmission parameter from a transmission source module located upstream to a transmission target module located immediately downstream of the transmission source module along a predetermined transmission path including the information processing device, It can also be understood from the aspect of an information transmission program that causes a transmission module belonging to the transmission path to transmit the predetermined transmission information so that the predetermined transmission information to be processed by the information processing apparatus is transmitted. In this case, the information transmission program is configured to transmit the predetermined transmission information from the transmission source module to the transmission target module to the transmission module after changing a part or all of the predetermined transmission parameters. A detection step of detecting a changed transmission state being executed according to a predetermined transmission parameter, and when the changed transmission state is detected in the detection step, recovery transmission information is transmitted to the transmission source module, and the recovery A transmission recovery step of causing the transmission source module that has received the transmission information to execute transmission of the predetermined transmission information according to the predetermined transmission parameter before the change is performed again. It should be noted that the technical idea disclosed regarding the invention of the transmission module can be applied to the invention of the information transmission program as long as there is no technical flaw.

It is possible to suppress as much as possible an increase in the load of the transmission module or the network when the transmission parameter is changed in the transmission module belonging to the network for information transmission.

1 is a diagram showing a schematic configuration of a network system according to the present invention. FIG. 2 is a first functional block diagram of a transmission module included in the network system shown in FIG. 1. It is a 2nd functional block diagram of the transmission module contained in the network system shown in FIG. It is a functional block diagram of the server contained in the network system shown in FIG. It is a flowchart of the transmission process of the transmission information performed with a transmission module. FIG. 5 is a diagram schematically showing a data structure of transmission information to be transmitted in the transmission process shown in FIG. 4. It is a flowchart of the transmission recovery process performed with a transmission module. It is a figure which shows roughly the data structure of the recovery transmission information transmitted from a transmission module in the transmission recovery process shown in FIG. FIG. 2 is a sequence diagram relating to information exchange between transmission modules included in the network shown in FIG. 1. FIG. 2 is a diagram schematically showing a state in which a transmission failure has occurred between transmission modules in the network system shown in FIG. 1. FIG. 9B is a diagram schematically showing a state where a transmission parameter of the transmission module related to the transmission failure is changed and a new transmission path is formed after the transmission failure shown in FIG. 9A occurs. FIG. 9B shows a state in which transmission of recovery transmission information to the transmission module 2A is attempted when the transmission recovery process shown in FIG. 6 is performed in the transmission module 2C in a state where the new transmission path shown in FIG. 9B is formed. FIG. FIG. 9B shows a state in which transmission of recovery transmission information to the transmission module 2A is attempted when the transmission recovery process shown in FIG. 6 is performed in the transmission module 2B in the state where the new transmission path shown in FIG. 9B is formed. FIG. FIG. 9B shows a state in which transmission of recovery transmission information to the transmission module 2A is attempted when the transmission recovery process shown in FIG. 6 is performed in the transmission module 2D in the state where the new transmission path shown in FIG. 9B is formed. FIG. In the 2nd network system concerning the present invention, it is a figure showing roughly the state where transmission failure occurred between transmission modules. FIG. 10B is a diagram schematically illustrating a state where a transmission parameter of the transmission module related to the transmission failure is changed and a new transmission path is formed after the transmission failure illustrated in FIG. 10A occurs.

Referring to the drawings, a network system 10 (hereinafter also simply referred to as “network”) 10 according to the present invention and a transmission module 2 included in the network will be described. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of this embodiment.

FIG. 1 is a diagram showing a schematic configuration of the network 10. The network 10 includes a transmission module 2 on which sensors for measuring various external environment parameters (temperature, etc.) are mounted, or a transmission module 2 having only a relay function on which the sensors are not mounted. A network is formed so that each transmission module functions to collect environmental parameters in the information processing apparatus 1. When a plurality of transmission modules are distinguished from each other, letters (“A”, “B”, etc.) for identifying the individual are attached after the reference number 2 of the transmission module.

Specifically, the network 10 shown in FIG. 1 includes

transmission modules

2A and 2D as transmission modules equipped with sensors, and includes

transmission modules

2B, 2C, and 2E as transmission modules not equipped with sensors. The transmission path in the network 10 is formed so that the information flow starting from the transmission module 2A and the information flow starting from the transmission module 2D merge at the transmission module 2C. That is, transmission information including data measured by the transmission module 2A is transmitted in the order of the

transmission modules

2A, 2B, and 2C, and transmission information including data measured by the transmission module 2D is transmitted to the

transmission module

2D, 2E and 2C are transmitted in this order. The transmission information that has reached the transmission module 2C is finally transmitted to the information processing apparatus 1 that is the destination of information collection.

Here, the information processing apparatus 1 includes a transmission / reception apparatus 1a and a server 1b. The transmission / reception device 1a receives information transmitted from the transmission module 2C located closest to the information processing device 1 in each transmission path, and sends a predetermined operation command and notification to the transmission module located in each transmission path. It is a device for transmitting to the transmission module 2C for delivery. The transmission / reception device 1a is electrically connected to the server 1b. The server 1b collects information measured by sensors mounted on the

transmission modules

2A and 2D, for example, and performs predetermined information processing.

The measurement by the sensor mounted on the transmission module 2 and the transmission of the measurement data to the information processing apparatus 1 are performed after the power is turned on in each transmission module in order to realize continuous information collection. Are executed repeatedly at regular intervals (for example, at regular intervals). 1 includes a sensor function for measuring a measurement target, a function for recording and processing the measured information, a wireless function to the outside of the transmission module, A transmission module configured with a power supply function or the like and having no sensor mounted thereon is configured as a small device with a wireless function to the outside of the transmission module, a power supply function, or the like.

Examples of sensors mounted on the transmission module 2 include physical sensors such as a temperature sensor, a humidity sensor, an acceleration sensor, an illuminance sensor, a flow sensor, a pressure sensor, a ground temperature sensor, and a particle sensor, a CO2 sensor, and a pH sensor. There are chemical sensors such as sensors, EC sensors, and soil moisture sensors. In the present embodiment, in order to simplify the explanation, it is assumed that each transmission module 2 is equipped with a temperature sensor for measuring the external temperature at the position where each transmission module 2 is arranged, and the

transmission modules

2A, 2D. The temperature data measured in is provided for predetermined information processing in the server 1b.

Here, in the network 10, when measurement is performed by the sensor, the measurement data is finally transmitted to the information processing apparatus 1 through transmission processing by a plurality of transmission modules as transmission information. However, since transmission information is transmitted via radio in the network 10, the transmission environment is not suitable (for example, receiving radio wave interference from other radio devices outside the transmission path or between transmission modules). If there is an obstacle or the like temporarily, a transmission failure in which the transmission completion state of the transmission information to the transmission destination cannot be confirmed from the transmission source may occur. If this transmission failure continues, collection of transmission information to the information processing apparatus 1 does not proceed smoothly, and it is required to quickly eliminate the transmission failure.

Therefore, in the network 10 according to the present invention, when a transmission failure occurs, the transmission module that grasps the transmission failure autonomously resolves the state and retransmits information that could not be transmitted (hereinafter referred to as “transmission failure”). , “Transmission processing”). Thereby, collection of transmission information to the information processing apparatus 1 can be realized smoothly and promptly. Specifically, the transmission module 2 has an arithmetic device, a memory, and the like inside, and various functions are exhibited when a predetermined control program is executed by the arithmetic device. Therefore, FIG. 2A and FIG. 2B each show a functional block in which some of the various functions exhibited by the

transmission modules

2A and 2B belonging to the network 10 are imaged. In FIG. 2A, functional blocks of the transmission module 2A on which the sensor is mounted are illustrated, but the same applies to the transmission modules 2D mounted with other sensors. Further, FIG. 2B illustrates functional blocks for the transmission module 2B in which no sensor is mounted, but the same applies to the

other transmission modules

2C and 2E in which no sensor is mounted.

Hereinafter, the functions of the

transmission modules

2A and 2B will be described in order based on FIGS. 2A and 2B, respectively. First, the transmission module 2A includes a control unit 20, a communication unit 21, a transmission parameter storage unit 22, a measurement unit 24, and an information storage unit 25 as functional units. The driving power of the transmission module 2 may be supplied from a battery built in the module, or may be supplied from an AC power source outside the module.

The control unit 20 is a functional unit that performs various controls in the transmission module 2A, and particularly includes a transmission control unit 201, a transmission completion confirmation unit 202, a transmission parameter change unit 203, and a reset unit 204. The transmission control unit 201 transmits a transmission module (a transmission module in the network 10 shown in FIG. 1) located downstream from the transmission module 2A through a communication unit 21 described later according to transmission parameters held by a transmission parameter storage unit 22 described later. 2B) is a functional unit that transmits transmission information. The transmission parameters include a plurality of parameters that determine information transmission conditions in the transmission module 2A, and details thereof will be described later. As described above, the transmission control unit 201 itself is a functional unit that performs information transmission according to transmission parameters. However, as described later, when transmission information is transmitted again after transmission information transmission has failed as described later, The transmission control unit 201 functions as a retransmission unit according to the present invention together with a transmission parameter changing unit 203 described later.

The transmission completion confirming unit 202 is a functional unit that confirms that the transmitted transmission information has reached the direct transmission destination transmission module 2B when transmission information is transmitted by the transmission control unit 201. Yes, corresponding to the confirmation means according to the present invention. For example, when the transmission module 2B receives the transmission information from the transmission module 2A, and the transmission module 2B is designed to transmit an acknowledge signal corresponding to the reception to the transmission module 2A, the transmission completion confirmation unit 202 By confirming whether or not the acknowledge signal is received, the completion of transmission to the transmission destination is confirmed. If the transmission completion confirmation unit 202 cannot confirm the transmission completion state to the transmission destination, it means that a transmission failure has occurred in the self-transmission module. The transmission parameter changing unit 203 is a functional unit that changes some or all of the transmission parameters held in the transmission parameter storage unit 22 described later based on the transmission completion confirmation result by the transmission completion confirmation unit 202. . The reset unit 204 is a functional unit that performs initialization related to the control system of the self-transmission module. The initialization by the reset unit 204 causes initialization of transmission parameters stored in the transmission parameter storage unit 22 and loss of various data stored in the information storage unit 25 described later.

Next, the communication unit 21 controls transmission / reception of information to / from the outside through an antenna mounted on the transmission module 2 </ b> A, and specifically, a downstream transmission module according to an instruction from the transmission control unit 201. Transmission to 2B and reception of transmission information transmitted from the upstream transmission module if present. Note that the antenna included in the transmission module 2A has a diversity function, and the communication unit 21 can adjust ON / OFF of the diversity function as necessary to adjust the reception capability of the transmission module 2A. The communication unit 21 is configured to notify the upstream transmission module of an acknowledgment signal indicating that the transmission information has been received when the transmission information is received from the upstream transmission module. ing.

Next, the transmission parameter storage unit 22 is a functional unit that holds, in the memory of the transmission module 2A, transmission parameters that determine transmission conditions when transmission information is transmitted by the transmission control unit 201. Since there are a variety of specific transmission parameter modes, the transmission parameter storage unit 22 next determines transmission conditions when transmission information is transmitted by the transmission control unit 201 as transmission parameters largely related to the present invention. This is a functional unit that holds transmission parameters to be stored in the memory of the self-transmission module. Since there are a variety of specific transmission parameter modes, five transmission parameters are typically exemplified below as transmission parameters largely related to the present invention.
(1) Parameter for Validating Antenna Diversity The parameter is a parameter for setting ON / OFF of the antenna diversity function of the transmission module 2A, and is hereinafter referred to as “diversity parameter” in the present application. When the antenna diversity function is turned on, the reception capability of the self-transmission module 2A is improved, while the power consumption required for reception slightly increases.
(2) Parameter related to transmission power This parameter is a parameter related to the transmission intensity of transmission information from the transmission module 2A, and is hereinafter referred to as "transmission power parameter" in the present application. When the transmission power is increased, the area that can be transmitted from the transmission module 2A is expanded, and it is less susceptible to obstacles located near the transmission module 2A, but the power consumption required for transmission is increased. Will do.
(3) Parameter relating to node address of transmission module serving as transmission destination This parameter is a parameter for identifying a transmission target module which is a transmission module belonging to the same network and is a transmission destination from transmission module 2A. In the application, this is hereinafter referred to as “node parameter”. In the network 10 shown in FIG. 1, in the transmission module 2A, the node address of the transmission module 2B is set as a node parameter.
(4) Parameters related to the network The parameters are parameters for identifying the network in which the transmission module 2A transmits transmission information with the information processing apparatus 1 as the highest level as shown in FIG. This is referred to as “network parameter”. In the network 10 shown in FIG. 1, the network parameters in the transmission module 2 are all set to the same value for identifying the network 10.
(5) Parameter related to channel This parameter is a parameter related to a transmission channel used when information is transmitted between the transmission modules, and is hereinafter referred to as “channel parameter” in the present application. Generally, common channel parameters are set between transmission modules belonging to the same network.
Note that some or all of the transmission parameters (1) to (5) stored in the transmission parameter storage unit 22 can be changed by an instruction from the transmission parameter changing unit 203. When the reset process is performed by the reset unit 204, the transmission parameters (1) to (5) stored in the transmission parameter storage unit 22 are initialized and changed to initial setting values. .

The measurement unit 24 is a functional unit that measures an external environment parameter (for example, an external temperature) through a sensor (for example, a temperature sensor) mounted on the transmission module 2A. The measurement data obtained by the measurement unit 24 is stored in the memory of the transmission module 2A by the information storage unit 25. And when the transmission module 2A functions as a repeater (that is, when another transmission module exists on the upstream side of the transmission module 2A), the information storage unit 25 transmits the upstream transmission module via the communication unit 21. The transmission information received from is also stored. These pieces of information stored in the information storage unit 25 are transmitted to the downstream transmission module 2B via the communication unit 21 in accordance with instructions from the communication control unit 201. Note that when the reset process by the reset unit 204 is performed, the information stored in the information storage unit 25 is lost.

Next, functional units in the transmission module 2B will be described with reference to FIG. 2B. In addition, about the functional part in the transmission module 2B and the functional part which can be substantially identified among the functional parts in the transmission module 2A shown to FIG. 2A, the same reference number is attached | subjected and the detailed description is abbreviate | omitted. The transmission module 2B includes a control unit 20, a communication unit 21, a transmission parameter storage unit 22, an information storage unit 25, and a recovery control unit 26 as functional units. The reason why the transmission module 2B does not have the measuring unit 24 is that the transmission module functions only as a repeater without mounting a sensor.

Hereinafter, the recovery control unit 26 shown in FIG. 2B will be described. In the transmission module 2B, the recovery control unit 26 performs control regarding the changed transmission parameter when a part or all of the transmission parameter held in the transmission parameter storage unit 22 is changed by the transmission parameter changing unit 203. Although it is a function part to perform, it has the detection part 261, the transmission restoration part 262, and the transmission condition adjustment part 263 especially. The detection unit 261 transmits the transmission information in a state where the transmission parameter of the transmission source module is changed by the transmission parameter changing unit 203 when the transmission module is transmitted from the transmission source module according to the present invention to the transmission target module. It is a function part which detects the change transmission state currently performed. The specific functional contents of the detection unit 261 may vary depending on the relative relationship between the self-transmission module (transmission module 2B) and the transmission source module, and details will be described later.

Next, when the changed transmission state is detected by the detection unit 261, the transmission restoration unit 262 is used for transmitting information to the transmission source module with respect to the transmission source module related to the changed transmission state. This is a functional unit that works to restore the transmission parameter after the change to the transmission parameter before the change. Specifically, by transmitting recovery transmission information, which will be described later, from the transmission recovery unit 262 via the communication unit 21 to the transmission source module, the transmission source module that has received the recovery transmission information returns to the state before the change of the transmission parameter. Execute recovery. The transmission condition adjustment unit 263 is a functional unit that adjusts a transmission condition at the time of recovery when the transmission recovery unit 262 transmits recovery transmission information.

In FIG. 2A, the recovery control unit 26 is not described, but this reflects that no other transmission module is arranged upstream of the transmission module 2A based on the configuration of the network 10 shown in FIG. It is a thing. Therefore, when another transmission module is arranged on the upstream side of the transmission module 2A and the transmission module 2A is configured to receive transmission information therefrom, transmission by the transmission parameter changing unit 203 in the other transmission module is performed. If the parameter is changed, the restoration control unit 26 is preferably formed as a functional unit also in the transmission module 2A. Moreover, in FIG. 2B, although the measurement part 24 is not described, this reflects that the sensor is not mounted in the transmission module 2B. Therefore, when the transmission module 2B is equipped with a sensor, the measurement unit 24 is formed as a control unit. When the transmission module 2A includes all the functional units illustrated in FIGS. 2A and 2B, the transmission module 2A is configured to work on the downstream transmission module to restore the transmission parameters before the change. It is also possible.

Next, functional units formed in the server 1b will be described with reference to FIG. The server 1b includes a communication unit 11, a measurement data recording unit 12, an information processing unit 13, and a reception notification unit 14. The communication unit 11 is a functional unit that performs communication for collecting transmission information from the transmission module 2C located closest to the information processing device 1 in the transmission path via the transmission / reception device 1a. Specifically, the communication unit 11 controls transmission / reception between the transmission module 2 </ b> C and the information processing apparatus 1. The measurement data recording unit 12 is a functional unit that records temperature data, which is measurement data, of information included in transmission information transmitted from the transmission module 2 via the communication unit 11. Then, the measurement data recorded here is transferred to the information processing unit 13, and the information processing unit 13 performs predetermined information processing using the collected measurement data (for example, a transmission module based on temperature data). Air conditioning control of the installed space is performed. Therefore, the sensor mounted on the transmission module may be a sensor for measuring information necessary for predetermined information processing to be performed by the information processing unit 13. Next, the reception notifying unit 14 functions to notify the transmission module 2C, which is the transmission source of the transmission information, that the server 1b has received the transmission information from the transmission module received via the communication unit 11. Part.

Next, transmission processing in the transmission module will be described based on FIG. In addition, the said transmission process shows the specific content as a process implement | achieved by executing a predetermined control program in the transmission module 2A shown in FIG. 1 below. However, substantially the same transmission processing can be applied to other transmission modules.

FIG. 5 shows a data structure of transmission information transmitted by the transmission module 2A in the transmission process. The upper part (a) of FIG. 5 schematically shows the data structure of the entire transmission information, and the transmission information is roughly divided into eight areas. In the present embodiment, among the eight regions, five particularly important regions a1 to a5 will be described. The area a1 (Start Symbol) is a specific byte string indicating the start of transmission information. An area a2 (Destination Address) represents an address of a destination (information processing apparatus 1 in this embodiment) to which transmission information is finally transmitted. An area a3 (Source Address) represents an address of a transmission information transmission source (in the case of the present embodiment, the transmission module 2A). The area a4 (Data) stores temperature data measured by a temperature sensor mounted on the transmission module 2A that is a transmission source. Area a5 (Terminator Symbol for Data) is a specific byte string indicating the end of transmission information.

Next, an example of measured temperature data stored in the area a4 is shown in the lower part (b) of FIG. In this embodiment, in the transmission module 2A, the temperature data for two times measured after the transmission of the previous transmission information is stored in the area a4. Specifically, the temperature data T1 acquired at the time t10 and the temperature data T2 acquired at the time t20 are stored in the area a4 in the order of the data acquisition time. This is because the transmission module 2A is designed not to transmit the measurement data to the transmission module 2B every time data measurement is performed by the temperature sensor, but to transmit the measurement data of a plurality of times collectively. Of course, the form of the measurement data to be transmitted is not limited to the form shown in FIG.

<Transmission processing>
Here, returning to FIG. 4, the transmission process executed by the transmission module 2A will be described. First, in S101, the transmission control unit 201 determines whether or not it is time to transmit transmission information from the own transmission module 2A to the transmission module 2B located downstream thereof. If an affirmative determination is made in S101, the process proceeds to S102, and if a negative determination is made, the process of S101 is performed again.

Next, in S102, the transmission control unit 201 forms transmission information in a state where the measured temperature data stored in the information storage unit 25 is stored in the transmission information area a4 to be transmitted to the transmission module 2B. Transmission to the transmission module 2B is executed via the unit 21. The transmission is performed according to transmission parameters stored in the transmission parameter storage unit 22, that is, transmission parameters including a transmission power parameter, a node parameter, and a network parameter. When the process of S102 ends, the process proceeds to S103.

In S103, the transmission completion confirmation unit 202 determines whether or not a transmission failure has occurred in which the transmission completion state of the transmission information to the transmission module 2B cannot be confirmed. Specifically, when the transmission signal is transmitted and the acknowledge signal transmitted by the transmission module 2B that has received the transmission information cannot be confirmed by the transmission completion confirmation unit 202 within a predetermined time from the transmission, a transmission failure has occurred. It is judged. If an affirmative determination is made in S103, the process proceeds to S104, and if a negative determination is made, this transmission process is terminated.

Next, in S104, it is determined whether or not the number of retransmissions of transmission information in the transmission process, that is, the number of retransmissions of transmission information executed in S106 described later has reached a predetermined number. If an affirmative determination is made in S104, the process proceeds to S107, a reset process by the reset unit 204 is executed, and the transmission process is terminated. If a negative determination is made in S104, the process proceeds to S105. In S105, a part of the transmission parameters (transmission power parameter, node parameter, network parameter, etc.) stored in the transmission parameter storage unit 22 is transmitted by the transmission parameter changing unit 203 in order to eliminate the transmission failure that has occurred. Then, in S106, according to the changed transmission parameter, the transmission control unit 201 retransmits the transmission information that has failed to be transmitted, that is, the transmission information that could not be confirmed to be transmitted to the transmission module 2B. Is done. When the process of S106 is completed, the occurrence of a transmission failure related to the retransmitted transmission information is determined again by the process of S103. During the processes of S103 to S106, since the reset process by the reset unit 204 is not performed in the self transmission module 2A, the information stored in the information storage unit 25 is not lost.

In S105, when there are a plurality of transmission parameters to be changed, the transmission parameters may be changed one by one, or alternatively, a plurality of transmission parameters may be combined and changed. The transmission parameter change in S105 is repeated as long as an affirmative determination is made in S103 and a negative determination is made in S104. However, the transmission parameter change order is not limited to a specific order, and is a predetermined value. It can be set appropriately according to the purpose.

As described above, according to the transmission process shown in FIG. 4, when a transmission failure occurs when transmitting transmission information from the self-transmission module 2A, the processes of S103 to S106 are repeated. At this time, while the information stored in the information storage unit 25 is retained, a part of the transmission parameters stored in the transmission parameter storage unit 22 is autonomously changed, and the retransmission of the transmission information is repeated, thereby eliminating the transmission failure. Will be tried. Then, when the retransmission of the transmission information by changing the transmission parameter is successful, the transmission process is terminated.

<Transmission recovery process>
Here, the change of the transmission parameter in S105 and the recovery from the transmission state using the changed transmission parameter will be described in detail. In the present embodiment, attention is given to the above-described transmission power parameter as a transmission parameter to be changed. If the transmission power is set high in the transmission module 2A, it is possible to improve the transmission capability. However, since the power consumption in the transmission module 2A and interference with the surrounding wireless network occur, the transmission module 2A The transmission power is usually a value that is suppressed to some extent. Therefore, by increasing the transmission power in the transmission module 2A, it may be possible to eliminate a transmission failure that may occur due to the presence of an obstacle between the transmission modules.

Specifically, when it is determined in S103 that a transmission failure has occurred, the transmission module 2A performs a process of increasing the transmission power parameter stored in the transmission parameter storage unit 22 as a process of S104. Thereafter, the transmission control unit 201 retransmits the transmission information in accordance with the transmission parameters stored in the transmission parameter storage unit 22 including the changed transmission power parameter. As the transmission power parameter increasing process, for example, the transmission power parameter may be changed so that the transmission power gradually increases in order to suppress interference with surrounding networks as much as possible. In order to eliminate the transmission failure, the transmission power parameter may be changed so that the maximum transmission power can be set in the transmission module 2A.

Thus, when transmission failure occurs in the transmission module 2A, the transmission power parameter, which is the transmission parameter, is increased so that transmission information from the transmission module 2A to the transmission module 2B is successfully transmitted again. It becomes possible to continue collecting information to the information processing apparatus 1. On the other hand, when the transmission power parameter is changed in this way, the power consumption in the transmission module 2A increases. Therefore, if the transmission failure is caused by a temporary cause, information transmission with the increased transmission power parameter is stopped, and the value of the transmission power parameter is returned to the value before being increased. By performing the recovery process, it is possible to avoid the state where the power consumption is increased.

Therefore, in order to avoid an increase in power consumption in the transmission module 2A due to the change in the transmission parameter performed in order to eliminate the transmission failure as described above, the transmission restoration process shown in FIG. Executed. The transmission restoration process is a process realized by executing a predetermined control program in the transmission module 2B. Then, the transmission restoration process is executed at predetermined intervals in the transmission module 2B in a position to receive transmission information from the transmission module 2A. In the transmission recovery process according to the present embodiment, the transmission target module is not changed before and after the parameter change because the transmission parameter to be changed is the transmission power parameter. The transmission module 2A corresponds to the transmission source module according to the present invention, and the transmission module 2B corresponds to the transmission target module according to the present invention. In the following description of the transmission recovery process, “self-transmission module” refers to the transmission module 2B in which the process is executed.

First, in S201, the detection unit 261 calculates an average value of transmission intensity when information is transmitted from the transmission source module 2A. The transmission intensity reflects the value of the transmission power parameter in the transmission module 2A. Specifically, since the received signal strength when the transmission information from the transmission module 2A is received on the transmission module 2B side is considered to reflect the transmission power of the transmission module 2A, based on the received signal strength, An average value of the transmission intensity of the transmission source module 2A is calculated. In calculating the average value, the average value is calculated by using the received signal strength for a plurality of times received from the transmission module 2A in the past. By using the received signal strength a plurality of times, it is possible to avoid erroneously detecting a changed transmission state described later when the received signal strength is accidentally increased. As another method, the reception signal strength in one reception may be used, and the average value of the transmission strength in S201 may be calculated based on the value. When the process of S201 ends, the process proceeds to S202.

Next, in S202, based on the average value of the transmission intensity calculated in S201, the detection unit 261 determines whether or not a changed transmission state has occurred in the transmission source module 2A. Specifically, when the average value of the transmission strength calculated in S201 exceeds a predetermined transmission strength as a reference, the transmission power parameter is changed in the transmission module 2A and the transmission strength is increased. Since transmission is being performed, it is determined that a changed transmission state has occurred. The predetermined transmission strength may be a value stored in the memory of the self-transmission module 2B in advance, or the transmission strength of the transmission module 2A until the transmission failure determined in S103 shown in FIG. 4 occurs. The predetermined transmission intensity may be set. If an affirmative determination is made in S202, the process proceeds to S203, and if a negative determination is made, the processes in and after S201 are repeated.

Next, in S203, the transmission condition adjusting unit 263 adjusts a transmission condition for transmitting recovery transmission information described later, that is, a recovery transmission condition. Since the self-transmission module 2B is a transmission target module even after the transmission parameter is changed as described above, the self-transmission module 2B transmits the recovery transmission information from the self-transmission module 2B to the transmission source module 2A in this transmission recovery processing. If the transmission source module 2A can receive the signal, it can be considered that the transmission failure occurring between the

transmission modules

2A and 2B has been eliminated. In particular, transmission when the transmission source module 2A transmits the transmission condition during recovery when transmitting the recovery transmission information from the self-transmission module 2B at this time using the transmission parameter before the change, that is, the transmission power parameter before being increased. If the condition is the same as or can be identified with the condition, it is possible to substantially confirm in advance that the transmission source module 2A can again transmit with the transmission parameter before the change.

Therefore, the transmission condition adjusting unit 263 considers that the transmission source module 2A transmits again with the transmission parameter before the change again, so that substantially the same transmission conditions as the transmission conditions at that time are reproduced. The transmission conditions for transmitting the recovery transmission information from the self-transmission module 2B to be adjusted are adjusted. Specifically, based on the value of the transmission parameter before the change in the transmission source module 2A, the recovery transmission condition in the self transmission module 2B is calculated. And the said adjustment is performed based on the difference of the transmission capability of the self transmission module 2B which is a transmission object module, and the transmission capability of the transmission source module 2A. For example, if the

transmission modules

2A and 2B have the same specifications regarding the transmission capability, the transmission condition adjustment unit 263 sets the same value as the transmission power parameter before the change in the transmission source module 2A to the self transmission module 2B. Is set to the transmission power parameter when transmitting the recovery transmission information. As another example, when the transmission capability of the transmission module 2B is different from the transmission capability of the transmission module 2B, recovery transmission information is transmitted from the self-transmission module 2B that determines the transmission condition at the time of recovery. The transmission condition of the transmission module 2A is substantially reproduced according to the transmission power parameter before the change by reflecting the transmission power parameter at the time. When the process of S203 ends, the process proceeds to S204.

Regarding the value of the transmission power parameter before the change, the self-transmission module 2B estimates the value of the transmission power parameter of the transmission source module 2A based on the received signal strength from the transmission source module 2A before the change of the transmission power parameter. May be. In addition, when the transmission information received from the transmission source module 2A includes information related to the transmission power parameter, the transmission power parameter before the change is determined based on the transmission information received before the transmission power parameter is changed. You may know the value.

In S204, the recovery transmission information is transmitted from the self-transmission module 2B to the transmission source module 2A in accordance with the recovery transmission conditions adjusted in S203. The restoration transmission information causes the transmission source module 2A that has received the restoration transmission information to restore the transmission parameter (in the case of this embodiment, the transmission power parameter) changed by its own transmission parameter changing unit 203 to the state before the change. Information. Here, FIG. 7 shows the data structure of the recovery transmission information. The upper part (a) of FIG. 7 schematically shows the data structure of the entire recovery transmission information, and the recovery transmission information is divided into eight areas in the same manner as the transmission information shown in FIG. Of these, the five areas b1 to b5 that are particularly important correspond to the five areas a1 to a5 in the transmission information shown in FIG. 5, and the description of the details of the areas other than the area b4 is omitted.

The area b4 is an area for storing specific data like the area a4. Specifically, as shown in the lower part (b) of FIG. 7, the area b4 includes an area b41 and an area b42. Stores a command code which means to restore the transmission power parameter to the state before the change for the transmission source module 2A. Further, the area b52 stores recovery contents indicating how the transmission source module 2A is recovered, for example, the value of the transmission power parameter after the recovery (the value of the transmission power parameter before the change). The transmission source module 2A that has received the recovery transmission information configured as described above changes the currently used transmission power parameter in accordance with the command code stored in the area b41 and the recovery content stored in the area b42. The transmission power parameter can be restored.

Also, in the transmission source module 2A, when the transmission power parameter change history is recorded, the area b4 may include only the area b41. In this case, the transmission source module 2A that has received the recovery transmission information uses the instruction code stored in the area b41 as an opportunity to transmit the transmission power parameter that is currently used according to the recorded change history before transmission. The power parameter can be restored.

Here, FIG. 8 shows a sequence representing transmission and reception of signals when the transmission processing and transmission recovery processing described above are performed in the

transmission modules

2A and 2B included in the network 10. In the example shown in FIG. 8, the transmission process is started at the timing T1 in the transmission module 2A. Thereafter, although information is transmitted twice, a transmission failure occurs, and the transmission parameter (in this embodiment, the transmission power parameter) is changed (increased) each time. When the transmission information is retransmitted after the second change of the transmission power parameter, an acknowledgment signal arrives from the transmission module 2B to the transmission module 2A at timing T2, and information transmission from the transmission module is successful at this time. This is confirmed in the transmission module 2A. After that, the transmission module 2B further transmits the transmission information received from the transmission module 2A to the transmission module 2C, and the transmission is successful.

At this time, the transmission power parameter in the transmission module 2A is in an increased state in order to eliminate the transmission failure, so that the power consumption required for information transmission is higher than the time before the timing T1. Therefore, the transmission recovery process is started at timing T3, and after the change transmission state is detected, the recovery transmission information is transmitted from the transmission module 2B to the transmission module 2A. When the transmission module 2A succeeds in receiving the restoration transmission information, the transmission module 2A returns to the restoration process of the transmission power parameter, that is, the state before the change, by the command code included in the received restoration transmission information. Is recovered (timing T4). Here, since the transmission of the recovery transmission information is executed according to the transmission conditions adjusted by the transmission condition adjustment unit 263 as described above, if the recovery transmission information reaches the transmission module 2A, it follows the transmission power parameter after the recovery. The possibility of successful information transmission is relatively high. As a result, it is possible to reduce power consumption required for information transmission from the transmission module 2A.

<Modification 1>
In the above embodiment, transmission processing and transmission recovery processing related to information transmission between the

transmission modules

2A and 2B have been described. However, the same applies to other transmission modules, for example, between the

transmission modules

2B and 2C. Can be applied. In addition, the transmission process and the transmission restoration process can be applied between the transmission module 2C in which wireless communication is performed and the transmission / reception apparatus 1a of the information processing apparatus 1. However, in this case, the transmission / reception device 1a corresponds to a transmission target module, and in the transmission process in the transmission module 2C, a reception notification transmitted from the reception notification unit 14 of the server 1b connected to the transmission / reception device 1a is used. Based on this, the occurrence of transmission failure is confirmed, and transmission power parameter increase processing is performed according to the result. The transmission recovery process is executed in the transmission / reception device 1a, and the recovery transmission information is transmitted from the transmission / reception device 1a to the transmission module 2C based on the detection result of the changed transmission state of the transmission module 2C.

When the transmission module 2B is a type of transmission module equipped with a sensor, transmission information transmitted from the transmission module 2B to the transmission module 2C also has the data structure shown in FIG. 5, but the measured temperature included in the region a4. The data may be data obtained by adding the temperature data measured by the transmission module 2B to the measured temperature data included in the transmission information received from the transmission module 2A. In this case, the measured temperature data included in the transmission information received from the transmission module 2A is stored in the information storage unit 25 together with the temperature data measured by the transmission module 2B, and the transmission module is processed in S102 shown in FIG. The transmission information is formed so as to be included in the transmission information transmitted from 2B.

In the second embodiment, attention is paid to the node parameter instead of the transmission power parameter described above as the transmission parameter to be changed in the transmission process, and the transmission restoration process when the node parameter is changed is shown in FIGS. This will be described based on 9E. FIG. 9A shows a state where a transmission failure has occurred between the

transmission modules

2A and 2B in the network 10 (that is, a state in which an affirmative determination is made in S103). At this time, the self-transmission module 2A broadcasts a message for searching for a transmission module that can be newly connected as a direct transmission destination to the surrounding transmission modules. The message includes, for example, a command that causes the transmission module that has received the message to return a node address for identifying the transmission module and the device type of the transmission module.

The transmission module 2A receives a reply from the transmission module that has received the message, and selects a transmission module as a new transmission target module from the transmission modules that have sent the reply. For example, based on the device type information included in the reply, a new transmission target is selected from transmission modules excluding transmission modules (for example, transmission modules having no relay function) that cannot be connected to the transmission module 2A. A transmission module as a module is determined, the determination is reflected in the node parameter stored in the transmission parameter storage unit 22, and the transmission parameter is changed. Thereafter, the transmission control unit 201 retransmits the transmission information according to the transmission parameters stored in the transmission parameter storage unit 22 including the changed node parameters.

In the case of this embodiment, it is assumed that the transmission module 2A broadcasts the message, and as a result, the transmission module 2D is searched for as a connectable transmission module. Then, as shown in FIG. 9B, the node parameter in the transmission process is changed in S105 so that the transmission module 2D is selected as a new transmission target module along the information transmission flow.

In this way, when a transmission failure occurs in the transmission module 2A, it is possible to continue collecting information from the transmission module 2A to the information processing apparatus 1 again by changing the node parameter that is the transmission parameter. . On the other hand, when the node parameter is changed in this way, the number of transmission modules interposed between the transmission module 2A and the information processing apparatus 1 may increase. In the example shown in FIG. 9B, the number of intervening transmission modules increases by one before and after the node parameter change. As the number of intervening transmission modules increases in this way, the traffic of the entire network 10 increases and information congestion is likely to occur. For this reason, if the transmission failure is caused by a temporary cause, the transmission of the node parameter that causes an increase in traffic is stopped, and the node parameter is returned to the state before the change, and the transmission condition is restored. Thus, an increase in traffic can be avoided.

In such a case, the transmission restoration process shown in FIG. 6 is also useful. Here, regarding the transmission recovery processing when the node parameter is changed as shown in FIG. 9B in the transmission processing, the transmission recovery processing can be executed by the

transmission modules

2C, 2B, and 2D. Therefore, transmission recovery processing executed in each transmission module will be described below.

(1) When transmission restoration processing is performed in the transmission module 2C In this case shown in FIG. 9C, the transmission module 2A corresponds to the transmission source module according to the present invention, and the transmission module 2B is the transmission target module before the node parameter change. The transmission module 2D corresponds to the transmission target module after the node parameter change. In the following description of the transmission recovery process, “self-transmission module” refers to the transmission module 2C in which the process is executed.

When transmission recovery processing is performed in the self-transmission module 2C, even if the transmission target module for the transmission module 2A is changed from the transmission module 2B to the transmission module 2D by changing the node parameter, the self-transmission module 2C The transmission module is common in the transmission path from the transmission module 2A to the information processing apparatus 1, and is in a position to relay transmission information from the transmission module 2A together. Therefore, when the self-transmission module 2C sees the contents of the area a3 of the received transmission information, the transmission information whose transmission source is the transmission module 2A arrives not from the transmission module 2B but from the transmission module 2E. Occurrence can be detected. This detection corresponds to the processing of the detection unit 261 shown in S201 and S202.

Therefore, when the occurrence of the changed transmission state is detected, the recovery transmission information is transmitted from the self-transmission module 2C to the transmission source module 2A via the transmission module 2B, as indicated by the white arrow in FIG. 9C. The process of setting the path used before the node parameter change in this way as the transmission path of the recovery transmission information corresponds to the process of the transmission condition adjustment unit 263 shown in S203, and the transmission process of the recovery transmission information is changed to S204. This corresponds to the processing of the transmission recovery unit 202 shown. Then, the transmission source module 2A that has received the recovery transmission information performs the recovery processing of the changed node parameter in accordance with the command code and the contents included in the information areas b41 and b42, and as a result, the transmission Information transmission from the original module 2A to the transmission module 2B is resumed, and an increase in traffic on the network 10 can be suppressed. Since the transmission source module 2A can receive the recovery transmission information, it is unlikely that a transmission failure will occur after the recovery process.

Note that the same restoration transmission process as described above in the self-transmission module 2C can be performed in the information processing apparatus 1. This is because, similarly to the transmission module 2C, the transmission information always passes through the transmission path from the transmission module 2A to the information processing apparatus 1 before and after the change of the node parameter in the transmission / reception apparatus 1a.

(2) When transmission restoration processing is performed in the transmission module 2B In this case shown in FIG. 9D, the transmission module 2A corresponds to the transmission source module according to the present invention, and the transmission module 2B is the transmission target module before the node parameter change. The transmission module 2D corresponds to the transmission target module after the node parameter change. In the following description of the transmission recovery process, “self-transmission module” refers to the transmission module 2B in which the process is executed.

When transmission recovery processing is performed in the self-transmission module 2B, when the transmission target module for the transmission module 2A is changed from the self-transmission module 2B to the transmission module 2D by changing the node parameter, the self-transmission module 2B The transmission information does not reach from 2A. Therefore, when the transmission information does not reach the transmission module 2A from the transmission module 2A for a predetermined period, the self-transmission module 2B detects that the node parameter in the transmission module 2A is changed and the changed transmission state is generated. Can do. This detection corresponds to the processing of the detection unit 261 shown in S201 and S202.

Then, when the occurrence of the change transmission state is detected, the recovery transmission information is transmitted from the self-transmission module 2B to the transmission source module 2A as indicated by the white arrow in FIG. 9D. The process of setting the path used before the node parameter change in this way as the transmission path of the recovery transmission information corresponds to the process of the transmission condition adjustment unit 263 shown in S203, and the transmission process of the recovery transmission information is changed to S204. This corresponds to the processing of the transmission recovery unit 202 shown. Then, the transmission source module 2A that has received the recovery transmission information performs the recovery processing of the changed node parameter in accordance with the command code and the contents included in the information areas b41 and b42, and as a result, the transmission Information transmission from the original module 2A to the transmission module 2B is resumed, and an increase in traffic on the network 10 can be suppressed. Since the transmission source module 2A can receive the recovery transmission information, it is unlikely that a transmission failure will occur after the recovery process.

(3) When transmission recovery processing is performed in the transmission module 2D In this case shown in FIG. 9E, the transmission module 2A corresponds to the transmission source module according to the present invention, and the transmission module 2B is the transmission target module before the node parameter change. The transmission module 2D corresponds to the transmission target module after the node parameter change. In the following description of the transmission recovery process, “self-transmission module” refers to the transmission module 2D in which the process is executed.

When transmission recovery processing is performed in the self-transmission module 2D, when the transmission target module for the transmission module 2A is changed from the transmission module 2B to the transmission module 2D by changing the node parameter, the self-transmission module 2D originally Although the transmission information should not arrive from 2A, the transmission information is sequentially transmitted from the transmission source module 2A. Therefore, when the transmission information starts to arrive from the transmission source module 2A, the self transmission module 2D can detect that the node parameter in the transmission source module 2A is changed and the changed transmission state is generated. This detection corresponds to the processing of the detection unit 261 shown in S201 and S202.

Therefore, when the occurrence of the changed transmission state is detected, the recovery transmission information is transmitted from the self-transmission module 2D to the transmission source module 2A as indicated by the white arrow in FIG. 9E. In this case, the route set as the transmission route of the recovery transmission information is not the route used before the node parameter change. Therefore, in this case, the process corresponding to the process of the transmission condition adjustment unit 263 shown in S203 is not performed, but the transmission process of the recovery transmission information corresponds to the process of the transmission recovery unit 202 shown in S204. Then, the transmission source module 2A that has received the recovery transmission information performs the recovery processing of the changed node parameter in accordance with the command code and the contents included in the information areas b41 and b42, and as a result, the transmission Information transmission from the original module 2A is resumed to the transmission module 2B, and an increase in traffic on the network 10 can be suppressed. Note that, as described above, in this case, the processing of the transmission condition adjustment unit 263 shown in S203 is not performed, and thus it is not always possible to prevent the occurrence of a transmission failure after the recovery processing. When the recovery transmission information is received, the transmission source module 2A uses the predetermined transmission parameter before the change again, so that it is preferable to transmit the transmission information according to the predetermined transmission parameter before the change. It will be possible to resume.

In the third embodiment, as a transmission parameter to be changed in the transmission process, attention is paid to the network parameter instead of the transmission power parameter and the node parameter described above, and the transmission recovery process when the network parameter is changed will be described. To do. First, the change of the network parameter in the transmission process will be described with reference to FIGS. 10A and 10B. The networks shown in both figures include a network N2 formed by

transmission modules

2A and 2B and a network N3 formed by

transmission modules

2D and 2E. The information processing device 4 is arranged at the highest level in the network N2, and the information processing device 5 is arranged at the highest level in the network N3. The

information processing devices

4 and 5 have transmission /

reception devices

4a and 5a and

servers

4b and 5b, respectively, like the information processing device 1, so that both information processing devices can exchange information with each other. Are connected to each other to construct a shared database DB.

Here, FIG. 10A shows a state where a transmission failure has occurred between the

transmission modules

2A and 2B in the network N2 (that is, a state in which an affirmative determination is made in S103). At this time, the transmission module 2A sends a message for searching for a transmission module that can be newly connected as a transmission target module to the transmission module existing in a network other than the network to which the transmission module 2A belongs. Broadcast. Note that since the communication channels used in different networks may be different, the broadcast is performed using each communication channel that can be used by the transmission module 2A. Also, the message returns, for example, a network name for identifying a network to which the transmission module belongs, a communication channel used in the network, and a reception strength signal of the message to the transmission module that has received the message. Command to be executed.

The transmission module 2A receives a reply from the

transmission modules

2D and 2E belonging to the network N3 that has received the message, and selects a transmission module as a new transmission target module from the transmission modules that have sent the reply. For example, based on the information of the received intensity signal included in the reply, the transmission module that can most reliably receive the transmission information from the transmission module 2A is determined as a new transmission target module, and the transmission parameter storage unit 22 determines the determination. The transmission parameters are changed by reflecting the stored network parameters. Thereafter, the transmission control unit 201 retransmits the transmission information according to the transmission parameters stored in the transmission parameter storage unit 22 including the changed network parameters.

In the case of the present embodiment, it is assumed that the self-transmission module 2A broadcasts the message, and as a result, the transmission module 2D belonging to the network N3 having a large received signal strength is searched for as a connectable transmission module. Therefore, in the present embodiment, with respect to the self-transmission module 2A, as shown in FIG. 10B, the network parameters stored in the transmission parameter storage unit 22 are changed so that the network to which the self belongs is changed from N2 to N3. The channel parameter regarding the communication channel for connecting to the network N3 is changed in S105.

Thus, even when the network parameter is changed in the transmission process, the same transmission recovery process as in the case (2) when the node parameter is changed can be executed in the transmission module 2B belonging to the network N2. In the transmission module 2D belonging to the network N3, the same transmission recovery process as in the case (3) when the node parameter is changed can be executed.

<Other variations>
In the above-described embodiments, the transmission parameter of the transmission source module has been changed in response to the occurrence of a transmission failure at the time of information transmission from the transmission source module. There is also a case of changing. For example, even if no transmission failure has occurred, the occurrence of relatively strong noise is recognized in the vicinity of the transmission source module, and if the noise is further increased, it is determined that there is a high possibility that a transmission failure will occur. Proactively, it may be useful to increase the transmission strength parameter as described above. Even in such a case, it is preferable to restore the transmission strength parameter to the state before the change in a timely manner, unless the transmission strength parameter after the change must be maintained for information transmission. Therefore, there is a case where power consumption in the transmission source module can be suppressed. Therefore, even in such a case, it is possible to reduce the load on the transmission source module while avoiding the occurrence of a transmission failure as much as possible by applying the transmission recovery process shown in the first embodiment. Become. Similarly, as a countermeasure against noise, a case where a channel parameter is changed in a transmission parameter belonging to a network is conceivable. Even in such a case, the transmission restoration process shown in the first embodiment can be applied.

Further, when the transmission source module receives transmission information from another transmission module, when the reception is successful but the reception intensity is relatively low (close to the lower limit intensity within the allowable reception intensity range). ), The diversity parameter may be changed in the transmission source module to turn on the antenna diversity function. Even in such a case, the diversity parameter may be restored to the state before the change in a timely manner unless the diversity parameter after the change has to be maintained.

1, 4, 5...

Information processing device

1 b, 4 b, 5 b...

Server

2, 2 A, 2 B, 2 C, 2 D, 2 E... Transmission module N 2, N 3, 10.

Claims

A transmission module for transmitting predetermined transmission information to be processed by the information processing apparatus along a predetermined transmission path including the information processing apparatus,
In the predetermined transmission path, the predetermined transmission information is transmitted from a transmission source module located upstream to a transmission target module located immediately downstream of the transmission source module according to a predetermined transmission parameter,
Self-transmission module
The changed transmission state in which the transmission of the predetermined transmission information from the transmission source module to the transmission target module is executed according to the changed predetermined transmission parameter in which a part or all of the predetermined transmission parameter is changed. Detecting means for detecting;
When the changed transmission state is detected by the detection means, the recovery transmission information is transmitted to the transmission source module, and the predetermined transmission parameter before the change is again transmitted to the transmission source module that has received the recovery transmission information. A transmission recovery means for executing transmission of the predetermined transmission information according to
A transmission module comprising:
The source module is
Confirmation means for confirming a transmission completion state in which the predetermined transmission information transmitted according to the predetermined transmission parameter from the transmission source module is received by the transmission target module;
When a transmission failure occurs in which the transmission completion state of the predetermined transmission information cannot be confirmed by the confirmation means, part or all of the predetermined transmission parameters used for transmitting the predetermined transmission information that has become the transmission failure Resending means for resending the predetermined transmission information according to the changed predetermined transmission parameter formed by changing
Formed to have
The detection means of the self-transmission module detects the changed transmission state after the retransmission of the predetermined transmission information by the retransmission means;
The transmission module according to claim 1.
The transmission recovery means transmits the recovery transmission information to the transmission source module under a recovery-time transmission condition related to the predetermined transmission parameter before the change when the changed transmission state is detected by the detection means. , Causing the transmission source module that has received the recovery transmission information to execute transmission of the predetermined transmission information according to the predetermined transmission parameter before the change again.
The transmission module according to claim 2.
The self-transmission module corresponds to the transmission target module,
When the transmission failure occurs between the transmission source module and the self-transmission module, the retransmission unit retransmits the predetermined transmission information to the self-transmission module according to the changed predetermined transmission parameter.
The transmission module according to claim 3.
The self-transmission module further includes transmission condition adjustment means for adjusting the recovery-time transmission condition based on a difference between the transmission capability of the self-transmission module and the transmission capability of the transmission source module.
The transmission module according to claim 4.
Of the predetermined transmission parameters, the changed parameter is a parameter relating to transmission intensity from the transmission source module,
The detection means detects that the changed transmission state has occurred by detecting that an average value of transmission strength from the transmission source module regarding the predetermined transmission information for a predetermined number of times exceeds a predetermined transmission strength. ,
The transmission module according to claim 4 or 5.
When the transmission failure occurs between the transmission source module and the transmission target module, the retransmission unit changes part or all of the predetermined transmission parameter so as to change the transmission target module, Resending the predetermined transmission information according to the changed predetermined transmission parameter,
The self-transmission module is a transmission module that is common before and after the change of the predetermined transmission parameter in the predetermined transmission path.
The transmission module according to claim 3.
When the transmission failure occurs between the transmission source module and the transmission target module, the retransmission unit changes part or all of the predetermined transmission parameter so as to change the transmission target module, Resending the predetermined transmission information according to the changed predetermined transmission parameter,
The self-transmission module is a transmission module that becomes a new transmission target module after the change of the predetermined transmission parameter.
The transmission module according to claim 2.
The detection means detects that the change transmission state has occurred by detecting that the transmission target module has been changed,
The transmission module according to claim 7 or 8.
When the transmission failure occurs between the transmission source module and the transmission target module, the retransmission unit changes a part or all of the predetermined transmission parameter so as to change the transmission target module by the retransmission unit, Resending the predetermined transmission information according to the changed predetermined transmission parameter,
The transmission module that is a self-transmission module is a transmission module that has been the transmission target module before the change of the predetermined transmission parameter.
The transmission module according to claim 3.
Along a predetermined transmission path including the information processing device, processing is performed by the information processing device from a transmission source module located upstream to a transmission target module located immediately downstream of the transmission source module according to a predetermined transmission parameter. A network system configured to transmit the predetermined transmission information through a plurality of transmission modules such that the predetermined transmission information to be transmitted is transmitted;
At least one transmission module of the plurality of transmission modules is
The changed transmission state in which the transmission of the predetermined transmission information from the transmission source module to the transmission target module is executed according to the changed predetermined transmission parameter in which a part or all of the predetermined transmission parameter is changed. Detecting means for detecting;
When the changed transmission state is detected by the detection means, the recovery transmission information is transmitted to the transmission source module, and the predetermined transmission parameter before the change is again transmitted to the transmission source module that has received the recovery transmission information. A transmission recovery means for executing transmission of the predetermined transmission information according to
An information transmission network system.
The source module is
Confirmation means for confirming a transmission completion state in which the predetermined transmission information transmitted according to the predetermined transmission parameter from the transmission source module is received by the transmission target module;
When a transmission failure occurs in which the transmission completion state of the predetermined transmission information cannot be confirmed by the confirmation means, part or all of the predetermined transmission parameters used for transmitting the predetermined transmission information that has become the transmission failure Retransmitting means for retransmitting the predetermined transmission information according to the changed predetermined transmission parameter,
Formed to have
The detection means detects the changed transmission state after the retransmission of the predetermined transmission information by the retransmission means;
The information transmission network system according to claim 11.
The transmission recovery means transmits the recovery transmission information to the transmission source module under a recovery-time transmission condition related to the predetermined transmission parameter before the change when the changed transmission state is detected by the detection means. , Causing the transmission source module that has received the recovery transmission information to execute transmission of the predetermined transmission information according to the predetermined transmission parameter before the change again.
The information transmission network system according to claim 12.
Along a predetermined transmission path including the information processing apparatus, processing is performed by the information processing apparatus from a transmission source module located upstream to a transmission target module located immediately downstream of the transmission source module according to predetermined transmission parameters. An information transmission method for transmitting the predetermined transmission information so that the predetermined transmission information should be transmitted,
The changed transmission state in which the transmission of the predetermined transmission information from the transmission source module to the transmission target module is executed according to the changed predetermined transmission parameter in which a part or all of the predetermined transmission parameter is changed. A detection step to detect;
When the changed transmission state is detected in the detecting step, the transmission transmission information is transmitted to the transmission source module, and the predetermined transmission parameter before the change is again transmitted to the transmission source module that has received the recovery transmission information. A transmission recovery step for causing transmission of the predetermined transmission information according to
Including an information transmission method.
The source module is
Confirmation means for confirming a transmission completion state in which the predetermined transmission information transmitted according to the predetermined transmission parameter from the transmission source module is received by the transmission target module;
When a transmission failure occurs in which the transmission completion state of the predetermined transmission information cannot be confirmed by the confirmation means, part or all of the predetermined transmission parameters used for transmitting the predetermined transmission information that has become the transmission failure Retransmitting means for retransmitting the predetermined transmission information according to the changed predetermined transmission parameter,
Formed to have
In the detection step, the changed transmission state after the retransmission of the predetermined transmission information by the retransmission unit is detected,
The information transmission method according to claim 14.
In the transmission recovery step, when the changed transmission state is detected in the detection step, the recovery transmission information is transmitted to the transmission source module under a recovery transmission condition related to the predetermined transmission parameter before the change. , Causing the transmission source module that has received the recovery transmission information to execute transmission of the predetermined transmission information according to the predetermined transmission parameter before the change again.
The information transmission method according to claim 15.
Along a predetermined transmission path including the information processing device, processing is performed by the information processing device from a transmission source module located upstream to a transmission target module located immediately downstream of the transmission source module according to a predetermined transmission parameter. A program for transmitting the predetermined transmission information to a transmission module belonging to the transmission path so that the predetermined transmission information to be transmitted is transmitted.
In the transmission module,
The changed transmission state in which the transmission of the predetermined transmission information from the transmission source module to the transmission target module is executed according to the changed predetermined transmission parameter in which a part or all of the predetermined transmission parameter is changed. A detection step to detect;
When the changed transmission state is detected in the detecting step, the transmission transmission information is transmitted to the transmission source module, and the predetermined transmission parameter before the change is again transmitted to the transmission source module that has received the recovery transmission information. A transmission recovery step for causing transmission of the predetermined transmission information according to
An information transmission program that executes
The source module is
Confirmation means for confirming a transmission completion state in which the predetermined transmission information transmitted according to the predetermined transmission parameter from the transmission source module is received by the transmission target module;
When a transmission failure occurs in which the transmission completion state of the predetermined transmission information cannot be confirmed by the confirmation means, part or all of the predetermined transmission parameters used for transmitting the predetermined transmission information that has become the transmission failure Retransmitting means for retransmitting the predetermined transmission information according to the changed predetermined transmission parameter,
Formed to have
18. The information transmission program according to claim 17, wherein in the detection step, the changed transmission state after the retransmission of the predetermined transmission information by the retransmission unit is detected.
In the transmission recovery step, when the changed transmission state is detected in the detection step, the recovery transmission information is transmitted to the transmission source module under a recovery transmission condition related to the predetermined transmission parameter before the change. , Causing the transmission source module that has received the recovery transmission information to execute transmission of the predetermined transmission information according to the predetermined transmission parameter before the change again.
The information transmission program according to claim 18.