JP2007158418A - Ad hoc radio communication network, terminal unit therefor, method of setting active time, and method of setting transmission path - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal unit for an ad hoc radio communication network capable of maintaining a long communication state even if an unusual state occurs in a main power supply, and to provide a method for setting active time, an ad hoc radio communication network, and a method for setting a transmission path. <P>SOLUTION: There are provided the main power supply 20, a rechargeable spare power supply 25, a switch 30 for changing the main power supply and the spare one according to the output of the main power supply, a control unit 40 for generating a transmission interval change signal, and a transceiver 35 changing a transmission interval in response to the transmission interval change signal. The control unit has a main power supply monitoring means 62 for monitoring the output of the main power supply, a spare power supply monitoring means 60 for monitoring the remaining amount of the spare power supply, an active time control means 64, and a switching signal generation means 68. The active time control means is used for setting active time for allowing the transceiver to perform transmission according to the presence or absence of output in the main power supply and the remaining amount of the spare power supply. The switching signal generation means is used for generating the transmission interval change signal for changing the transmission interval of the transceiver corresponding to set active time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ad hoc wireless communication network terminal device, an active time setting method in the ad hoc wireless communication network terminal device, an ad hoc wireless communication network, and a transmission path setting method in the ad hoc wireless communication network.

  Ad hoc wireless communication networks are being realized that can maintain a communicable state for a long time even when a power failure or the like occurs. The terminal devices constituting this ad hoc wireless communication network usually include a transmission source terminal device, a destination terminal device, and relay terminal devices belonging to a plurality of routes set between the transmission source and the destination terminal devices.

  A terminal device in a conventional ad hoc wireless communication network includes, for example, a main power source that supplies power supplied from a commercial power source to the terminal device, and a battery as a standby power source. When the main power supply is normal, the main power supply supplies power to the terminal device and charges the battery according to the remaining battery level.

In the terminal device configured as described above, when an abnormality occurs in the main power supply, for example, when the supply of power is stopped due to a power failure of the commercial power supply, the power supply is switched and the battery is connected to the terminal device. Electric power is supplied (for example, refer to Patent Document 1).
JP 2003-284259 A (paragraphs 0003 to 0005)

  However, since the above-described conventional terminal device simply switches the power source from the main power source to the battery, there is a problem that it is difficult to maintain a communicable state if the main power source is abnormal for a long time. is there.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a terminal device for an ad hoc wireless communication network that can maintain a communication state for a long time even when an abnormality occurs in a main power supply, An active time setting method, an ad hoc wireless communication network, and a transmission path setting method are provided.

  In order to achieve the above-described object, an ad hoc wireless communication network terminal device according to the present invention includes a main power source, a chargeable standby power source, and a switching unit that switches between the main power source and the standby power source according to the output of the main power source. And a control unit that generates a transmission interval switching signal and a transceiver that switches the transmission interval in response to the transmission interval switching signal. The control unit includes main power supply monitoring means, standby power supply monitoring means, active time control means, and switching signal generation means. The main power monitoring means monitors the output of the main power, and the standby power monitoring means monitors the remaining amount of the standby power. The active time control means determines whether or not the main power supply is output, and if the result of the determination is that there is no main power output, the active time during which the transceiver transmits is set to the shortest while the main power output is If there is, the active time is set according to the remaining power of the standby power supply. The switching signal generating means generates a transmission interval switching signal for switching the transmission interval in the transceiver according to the set active time.

  Further, in implementing the ad hoc wireless communication network terminal device of the present invention, the control unit is configured to include a state monitoring unit that monitors the state of the main power source, and the active time control unit includes the presence or absence of the output of the main power source, and If there is no main power output and the main power is abnormal, the active time is set to the shortest. On the other hand, there is no main power output and the main power is not When there is no abnormality in the power source or when there is an output of the main power source, it is preferable to set the active time according to the remaining amount of the standby power source.

  The above-described ad hoc wireless communication network terminal device includes an ad hoc device including a transmission source terminal device, a destination terminal device, and relay terminal devices belonging to a plurality of routes set between the transmission source terminal device and the destination terminal device. When used in a wireless communication network, the control unit may further include route selection means, remaining amount information requesting means, remaining amount information receiving means, and route determination means. The route selection means selects a plurality of routes from the transmission source terminal device to the destination terminal device. The remaining amount information requesting unit requests information on the remaining amount of the standby power that each of the plurality of relay terminal devices has from the plurality of relay terminal devices. The remaining amount information receiving means receives the remaining amount information of the standby power generated in each of the plurality of relay terminal apparatuses in response to the request for the remaining amount information. The route determination means compares the received remaining amounts of the plurality of standby power sources and determines a route with the relay terminal device having the largest remaining amount as the transmission destination terminal.

  The active time setting method for an ad hoc wireless communication network terminal device according to the present invention is performed when setting a transmission interval in a transceiver provided in the terminal device, and includes a monitoring process, a determination process, and an active time setting process. I have. In the monitoring process, the output of the main power source and the remaining amount of the standby power source are monitored. In the determination process, the presence or absence of the output of the main power source is determined. In the active time setting process, if it is determined in the determination process that there is no main power output, the active time is set to the shortest. On the other hand, if it is determined that the main power output is present, the active time is reserved. Set according to the remaining power.

  Further, according to another preferred embodiment of the active time setting method of the ad hoc wireless terminal device of the present invention, in the monitoring process, the output of the main power source, the state of the main power source, and the remaining amount of the standby power source are monitored, In the determination process, if it is determined that there is no main power output and there is an abnormality in the main power supply, the active time is set to the shortest in the active time setting process. If it is determined that there is no output and there is no abnormality in the main power supply, or if it is determined that there is output from the main power supply, the active time is obtained by monitoring the remaining power of the standby power supply during the active time setting process. It is good to set according to the remaining amount of spare power.

  Moreover, the ad hoc wireless communication network of this invention is comprised including the terminal device for ad hoc wireless communication networks mentioned above.

  The transmission route setting method according to the present invention includes an ad hoc wireless communication including a transmission source terminal device, a destination terminal device, and relay terminal devices belonging to a plurality of routes set between the transmission source terminal device and the destination terminal device. Implemented in setting up a signal transmission path from a source terminal apparatus to a destination terminal apparatus in a network, and includes a path selection process, a remaining capacity information request process, a remaining capacity information reception process, and a path determination process. Yes. In the route selection process, a plurality of routes from the transmission source terminal device to the destination terminal device are selected. In the remaining amount information requesting process, the information on the remaining amount of the standby power supply possessed by each of the plurality of relay terminal devices is requested to the plurality of relay terminal devices. In the remaining amount information receiving process, information on the remaining amount of the standby power generated in the relay terminal apparatus in response to the request for the remaining amount information is received. In the route determination process, the remaining amounts of the plurality of standby power supplies received are compared with each other, and the route is determined with the relay terminal device having the largest reserve power remaining amount as the transmission destination terminal.

  According to the ad hoc wireless communication network terminal device and the active time setting method in the ad hoc wireless communication network terminal device of the present invention, the terminal device is provided according to the presence or absence of the output of the main power supply and the remaining amount of the standby power supply. An active time which is a transmission time in the transceiver can be set, and switching of the transmission interval of the transceiver can be controlled in accordance with the set active time. For example, if it is determined that there is no main power output as a result of determining whether there is a main power output, the active time is set to the shortest, while if it is determined that there is a main power output, Since the active time is switched according to the remaining power, the power consumption can be reduced in the event of an abnormality such as the absence of main power output, and the standby power can be efficiently charged even when the main power is normal. be able to.

  An ad hoc wireless communication network including the terminal device for an ad hoc wireless communication network according to the present invention selects a plurality of transmission paths from a transmission source terminal apparatus to a destination terminal apparatus and belongs to each transmission path. The route is determined according to the information on the remaining power of the standby power supply. Therefore, if the route is determined with the relay terminal device having the largest remaining amount of spare power as the destination terminal device, it is possible to perform communication while avoiding terminal devices with a small remaining amount of spare power. It becomes possible to maintain the entire communicable state for a long time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the configuration and the arrangement relationship are merely schematically shown to the extent that the present invention can be understood. In the following, preferred configuration examples of the present invention will be described. However, numerical conditions and the like are merely preferred examples, and therefore the present invention is not limited to the following embodiments.

(Terminal device of the first embodiment)
With reference to FIG. 1, the ad hoc wireless communication network terminal device of the first embodiment will be described. FIG. 1 is a schematic configuration diagram for explaining an ad hoc wireless communication network terminal device according to a first embodiment.

  The ad hoc wireless communication network terminal device (hereinafter also referred to as a terminal device or a node) 10 includes a main power supply 20, a standby power supply 25, a switching unit 30, a control unit 40, a data transmission / reception unit 32, and a transceiver 35. Configured.

  Here, for example, a solar cell can be used as the main power source 20. Further, when power is supplied to the terminal device 10 from the outside such as a commercial power source, the main power source 20 is supplied with any suitable well-known converter or voltage that converts the power supplied from the outside into alternating current into direct current. It can be constituted by a so-called transformer to be converted.

  The standby power supply 25 is a rechargeable power supply that is used as a backup when the output of the main power supply 20 is lost due to a failure of a solar cell, a power failure of a commercial power supply, or the like. can do. In the following description, a case where a battery is used as the standby power supply 25 will be described.

  The switching unit 30 is connected to the main power supply 20, the standby power supply 25, and the transceiver 35. As the switching unit 30, any suitable known charging IC that switches the electrical connection state among the main power supply 20, the standby power supply 25, and the transceiver 35 can be used. In the following description, a case where a charging IC is used as the switching unit 30 will be described.

  When the output of the main power supply 20 is present, for example, when the output voltage of the main power supply 20 is equal to or higher than the threshold voltage set in the charge IC 30 in advance, the charging IC 30 is connected between the main power supply 20 and the transceiver 35, and The main power supply 20 and the standby power supply 25 are electrically connected. At this time, power is supplied from the main power source 20 to the transceiver 35 and the standby power source 25 is charged by the main power source 20. On the other hand, when there is no output from the main power supply 20, for example, when the output voltage of the main power supply 20 is less than the threshold voltage set in the charging IC 30 in advance, the charging IC 30 is connected between the standby power supply 25 and the transceiver 35. Are electrically connected. At this time, power is supplied from the standby power supply 25 to the transceiver 35.

  As the control unit 40, for example, an MPU (Microprocessing Unit) having a known configuration can be used. Here, the MPU 40 is configured to include a central processing unit (CPU) 50, a RAM (Random Access Memory) 42 as a memory, and a ROM (Read Only Memory) 44. In the following description, it is assumed that the power supplied to the transceiver 35 is branched and supplied to the MPU 40.

  The control means 52 provided in the CPU 50 reads a program recorded in a readable manner in the ROM 44 or the like, and by executing the program, as a function means of the CPU 50, a standby power supply monitoring means 60, a main power supply monitoring means 62, an active time control. Means 64 and switching signal generation means 68 are realized. Further, the MPU 40 includes, as a functional unit of the CPU 50, a route setting unit 70 that sets a route from a transmission source terminal device to a destination terminal device, which is normally provided in a terminal device used in an ad hoc wireless communication network.

  The main power supply monitoring unit 62 constantly monitors the presence or absence of the output of the main power supply 20 by receiving from the main power supply 20 an electrical signal including the measurement result of the output voltage of the main power supply 20 as information. The standby power supply monitoring means 60 constantly monitors the remaining amount of the battery serving as the backup power supply 25 by receiving from the backup power supply 25 an electrical signal that includes the measurement result of the output voltage of the backup power supply 25 as information. The active time control means 64 sets the active time according to the presence / absence of the output of the main power supply 20 and the remaining amount of the battery 25. The switching signal generating means generates a transmission interval switching signal for switching the transmission interval of the transceiver 35 corresponding to the active time. The setting of the active time will be described later.

  Here, the active time is a time during which data is transmitted from the transceiver 35 to another terminal device. Note that data transmission is periodically performed for each unit of a certain data length, that is, at a certain transmission interval at a certain time width. Here, in accordance with the active time set by the active time control means 64, the transmission interval when data is transmitted via the transceiver 35 is determined.

  Active time data indicating the active time corresponding to the remaining amount of the standby power supply 25 is recorded in advance in the ROM 44 or RAM 42 of the control unit so as to be readable. The active time data may be a table including a set of battery remaining amount and active time of a number n (n is an integer of 2 or more) determined according to the measurement accuracy of the remaining battery amount by the standby power monitoring means 60. it can. For example, when n is 2, normal transmission (for example, transmission at intervals of 1 second) is performed when the remaining battery level is 100%, and maximum shortened transmission (for example, when the remaining battery level is less than 100%) The active time data is set to perform transmission at intervals of 10 seconds. When n is 3 or more, the active time data is set so that shortened transmission is performed at a time interval between normal transmission and maximum shortened transmission according to the value of the remaining battery level.

  When the active time control unit 64 receives the information of the monitoring results from the main power supply monitoring unit 62 and the standby power supply monitoring unit 60, the active time control unit 64 reads the active time data from the ROM 44 or the RAM. Subsequently, the active time control unit 64 sets the active time according to the presence / absence of the output of the main power supply 20 and the remaining amount of the standby power supply 25 by referring to the active time data.

  Next, the switching signal generating unit 68 generates a transmission interval switching signal for switching the transmission interval of the transceiver 35 in accordance with the active time set by the active time control unit 64, and then transmits the transmission interval switching signal to the transceiver 35. Send to. The transmission interval switching signal can be an electric signal having two voltage levels, for example, a high level (H) and a low level (L).

  The transmission interval switching signal will be described with reference to FIG. FIG. 2 is a diagram for explaining the transmission interval switching signal, in which the horizontal axis represents the time axis, and the vertical axis represents the signal magnitude (here, the voltage value). FIG. 2A shows a transmission interval switching signal in the case of normal transmission, and FIG. 2B shows a transmission interval switching signal in the case of shortened transmission. The high level time corresponds to the active time, and the repetition periods DA and DB of the active time correspond to the transmission interval.

  The data transmission / reception unit 32 may have any suitable configuration such as a computer that generates data, transmits data, receives data, and the like, and detailed description thereof is omitted here. The data transmitting / receiving unit 32 may be provided in the MPU 40. The transmission data generated by the data transmitter / receiver 32 is transmitted to other terminal devices belonging to the ad hoc wireless communication network via the transmitter / receiver 35.

  The transmitter / receiver 35 may be configured to include an RF (Radio Frequency) oscillator or the like provided in a terminal device of a known ad hoc wireless communication network that transmits transmission data generated by the data transmitter / receiver 32. The RF oscillator includes a switch circuit or the like that can switch a data transmission interval using an external signal (here, a transmission interval switching signal) as a trigger. When the transmission interval switching signal is an electric signal having two voltage levels of high level and low level, if the transmission interval switching signal is high level, the RF oscillator oscillates and the transmission interval switching signal is low level The transmission interval of the transceiver 35 is switched by setting the RF oscillator not to oscillate.

(Active time setting method of the first embodiment)
With reference to FIG. 3, the active time setting method of 1st Embodiment is demonstrated. FIG. 3 is a diagram illustrating a processing flow for explaining the operation of setting the active time in the terminal device according to the first embodiment.

  In the monitoring process of step (hereinafter, step is represented by S) 10, the main power supply monitoring means 62 receives an electric signal including information on the measurement result of the output voltage of the main power supply 20 from the main power supply 20 as a main signal. The presence or absence of output from the power supply 20 is constantly monitored. The standby power supply monitoring means 60 constantly monitors the remaining amount of the battery serving as the backup power supply 25 by receiving from the backup power supply 25 an electrical signal that includes the measurement result of the output voltage of the backup power supply 25 as information.

  In the determination process of S20, the active time control means 64 determines the presence or absence of the output of the main power supply 20 based on the monitoring result of the output of the main power supply 20 by the main power supply monitoring means 62. Following the determination process, an active time setting process is performed.

  If the result of determination in S20 is that there is no output of the main power supply 20, for example, if the output of the main power supply 20 is less than a preset reference value, the active time control means 64 sets the active time in S30. Set to the shortest. On the other hand, if there is an output of the main power supply 20, for example, if the output of the main power supply 20 is equal to or greater than a preset reference value, the active time control means 64 reads the active time data from the RAM 44 or ROM 42 in S35. Thus, the active time is set according to the remaining amount of the standby power source 25 monitored by the standby power source monitoring means 60. Here, the reference value for determining the presence or absence of the output of the main power supply 20 is recorded in a readable manner in the ROM 44 or the like, and the active time control means 64 reads the reference value and outputs the output voltage of the main power supply 20. To determine whether or not there is an output. In addition, when the charging IC is used as the switching unit 30, the reference value is preferably set equal to the threshold voltage of the charging IC.

  In response to the setting of the active time, the switching signal generating means 68 generates a transmission interval switching signal for switching the transmission interval of the transceiver 35 corresponding to the active time. The transceiver 35 switches the transmission interval in response to the transmission interval switching signal generated by the switching signal generation means 68.

  According to the ad hoc wireless communication network terminal device of the first embodiment and the active time setting method in the ad hoc wireless communication network terminal device, the terminal according to the presence or absence of the output of the main power supply and the remaining amount of the standby power supply It is possible to set an active time that is a transmission time in a transceiver included in the apparatus, and to control switching of the transmission interval of the transceiver in accordance with the set active time. For example, if it is determined that there is no main power output as a result of determining whether there is a main power output, the active time is set to the shortest. On the other hand, if it is determined that there is a main power output, Since the active time is switched according to the remaining power, the power consumption can be reduced in the event of an abnormality such as no main power output, and the standby power can be efficiently charged even when the main power is normal. be able to.

(Terminal device of the second embodiment)
With reference to FIG. 4, the terminal device of 2nd Embodiment is demonstrated. FIG. 4 is a schematic configuration diagram for explaining the terminal device of the second embodiment.

  The terminal device 11 according to the second embodiment is different from the terminal device 10 according to the first embodiment described with reference to FIG. 1 in that the control unit includes an abnormality determination unit 66. Since other configurations are the same as those of the terminal device 10 of the first embodiment, detailed description thereof is omitted.

  Similar to the main power supply monitoring means 62, the abnormality determination means 66 receives an electrical signal including information on the measurement result of the output voltage of the main power supply 20 from the main power supply 20, and determines whether the main power supply 20 is output from the ROM 44 or the like. In order to determine whether or not there is an abnormality in the main power supply 20, the reference value used to do this is read and the reference value is compared with the output voltage of the main power supply 20. When power is supplied from the commercial power source to the main power source 20, if there is no output from the main power source 20, it can be determined that there is an abnormality in the main power source 20 including a power failure of the commercial power source. Moreover, when a solar cell is used as the main power source 20, even if there is no output of the solar cell, the solar cell itself that is the main power source 20 does not have enough illuminance for the solar cell to obtain output. May not be abnormal. In this case, the abnormality determination means 66 can be configured to determine that there is an abnormality in the main power supply 20 when there is no output from the main power supply 20 for 12 hours or more.

  The configuration of the active time control means 65 is the same as that of the active time control means 64 of the first embodiment, but in addition to the information on the presence / absence of the output of the main power supply 20 and the remaining amount of the standby power supply 25, the abnormality of the main power supply 20 The active time is set by determining whether or not there is any.

(Modification of the terminal device of the second embodiment)
With reference to FIG. 5, the modification of the terminal device of 2nd Embodiment is demonstrated. FIG. 5 is a schematic configuration diagram for explaining a modification of the terminal device of the second embodiment.

  The terminal device 12 of this modification is different from the terminal device 11 of the second embodiment described with reference to FIG. 4 in that the illuminometer 23 is provided. Since other configurations are the same as those of the terminal device 11 of the second embodiment, detailed description thereof is omitted.

  The illuminometer 23 is a well-known measuring device for sensing illuminance. The measurement result of the illuminometer 23 is sent to the abnormality determination means 66 as an electric signal, for example. When there is no output of the solar cell as the main power source 20, the abnormality determination means 66 further monitors the illuminance as a measurement result by the illuminance meter 23, and the solar cell as the main power source 20 obtains the output. When there is sufficient illuminance, it is determined that the main power supply 20 is abnormal. On the other hand, when there is not enough illuminance for the solar cell to obtain output, it is determined that the main power supply 20 is normal.

(Active time setting method of the second embodiment)
With reference to FIG. 6, the active time setting method of 2nd Embodiment is demonstrated. FIG. 6 is a diagram illustrating a processing flow for explaining the operation of setting the active time in the terminal device according to the second embodiment.

  In the monitoring process of S12, the main power supply monitoring means 62 monitors the output of the main power supply 20, the abnormality determination means 66 monitors the state of the main power supply 20, and the standby power supply monitoring means 60 determines the remaining amount of the standby power supply 25. Monitor.

  In the determination process of S20, the main power supply monitoring unit 62 determines the presence or absence of the output of the main power supply 20 based on the monitoring result of the output of the main power supply 20. When there is no output from the main power supply 20, the abnormality determination unit 66 determines whether the main power supply 20 is abnormal. Following the determination process, an active time setting process is performed.

  As a result of determining whether or not there is an output from the main power supply 20 and whether or not there is an abnormality in the main power supply 20, if there is no output from the main power supply 20 and there is an abnormality in the main power supply 20, the active time control means 65 in S30 Set the active time to the shortest. On the other hand, when there is an output from the main power supply 20 or when there is no output from the main power supply 20, but the main power supply 20 is normal, the active time control means 65 reads the active time data from the ROM 44 or RAM 42 in S35. And the active time corresponding to the remaining amount of the standby power supply 25 monitored by the standby power supply monitoring means 60 is set.

  In response to the setting of the active time, the switching signal generating means 68 generates a transmission interval switching signal for switching the transmission interval of the transceiver 35 corresponding to the active time. The transceiver 35 switches the transmission interval in response to the transmission interval switching signal generated by the switching signal generation means 68.

  According to the terminal device of the second embodiment and the active time setting method in the terminal device, when there is no main power output, the active time is minimized, and when the main power output is present, Even if there is no output, the active time is switched according to the remaining power of the standby power source when the main power source is normal, so power consumption can be reduced when the main power source is abnormal and the main power source When normal, the standby power supply can be efficiently charged.

(Transmission route setting method in ad hoc wireless communication network)
A route setting method in an ad hoc wireless communication network using the terminal device of the first embodiment or the second embodiment described above will be described with reference to FIGS.

  FIG. 7 is a schematic diagram for explaining a configuration of an ad hoc wireless communication network. FIG. 8 is a schematic configuration diagram of route setting means provided in the terminal device of the first embodiment or the second embodiment. FIG. 9 is a processing flow of the transmission path setting method.

  The ad hoc wireless communication network 100 includes a plurality of terminal devices (nodes). Here, an example of transmission from the transmission source node 110 to the destination node 130 will be described.

  Note that the terminal device included in the ad hoc wireless communication network 100 may be the terminal device of the first embodiment or the second embodiment described with reference to FIGS. Each terminal device sets the active time according to the presence / absence of the output of the main power supply 20 and the remaining amount of the standby power supply 25 according to the processing flow described with reference to FIGS. 3 and 6. Each terminal device used here includes route setting means 71 as function means, route selection means 72, remaining amount information requesting means 74, remaining amount information transmitting means 75, remaining amount information receiving means 76, and route determining means. 78 is provided.

  In the route selection process of S110, the route selection unit 72 included in the route setting unit 71 selects a transmission route from the transmission source node 110 to the destination node 130. Each node has the configuration information of the network 100 in the RAM 42 or the ROM 44, and the route selection means 72 reads this configuration information and selects a plurality of routes from the transmission source node 110 to the destination node 130. The selection of the route is performed, for example, by selecting the transmission routes from the transmission source node 110 to the destination node 130 in order from the smallest number of nodes (hereinafter referred to as relay nodes) belonging to each transmission route.

  In the remaining amount information requesting process in S120, the remaining amount information requesting unit 74 supplies standby power to the relay nodes 121, 122, and 123 that are transmission destination terminals located on each of the plurality of routes selected in the route selecting step. Request information on remaining amount of 25. The request for the remaining amount information of the standby power supply 25 is generated by the remaining amount information requesting unit 74 generating a remaining amount information request signal for requesting the remaining amount information of the standby power supply 25, and via the transceiver 35, the relay node 121, This is done by transmitting to 122 and 123.

  In each relay node 121, 122, and 123 that has received the remaining amount information request signal from the transmission source node 110, the remaining amount information transmitting unit 75 receives information on the remaining amount of the standby power supply 25 from the standby power supply monitoring unit 60, and the remaining amount. Information is transmitted to the transmission source node 110.

  In the remaining amount information reception process of S130, the remaining amount information receiving means 76 of the transmission source node 110 receives the remaining amount of the standby power supply 25 generated in each relay node 121, 122, and 123 from each relay node 121, 122, and 123, respectively. Receive information.

  In the route determination process of S140, the route determination unit 78 of the transmission source node 110 compares the received remaining power levels of the standby power supplies 25 of the relay nodes 121, 122, and 123, and transmits the relay node having the largest remaining amount. Determine as the destination node.

  Thereafter, the transmission path from the transmission source node 110 to the destination node 130 is determined by determining the path in the transmission destination node as well as the transmission source node.

  An ad hoc wireless communication network including an ad hoc wireless communication network terminal device according to the present invention selects a plurality of transmission paths from a transmission source terminal apparatus to a destination terminal apparatus, and is a transmission destination terminal apparatus positioned in each transmission path. Since the route is determined according to the information on the remaining power of the standby power supply, communication can be performed while avoiding terminal devices with a small remaining power of the standby power supply, and the entire network can be maintained in a communicable state for a long time. It becomes possible.

It is a schematic block diagram for demonstrating the terminal device of 1st Embodiment. It is the schematic for demonstrating a transmission interval switching signal. It is a figure which shows the processing flow in the terminal device of 1st Embodiment. It is a schematic block diagram for demonstrating the terminal device of 2nd Embodiment. It is a schematic block diagram for demonstrating the modification of the terminal device of 2nd Embodiment. It is a figure which shows the processing flow in the terminal device of 2nd Embodiment. It is the schematic for demonstrating an ad hoc radio | wireless communication network. It is a schematic block diagram for demonstrating the route setting means with which a terminal device is provided. It is a figure which shows the processing flow for demonstrating the transmission path | route setting method.

Explanation of symbols

10, 11, 12 Terminal device 20 Main power supply 25 Spare power supply (battery)
30 switching part (charging IC)
32 Data transmitter / receiver 35 Transmitter / receiver 40 MPU (control unit)
42 RAM
44 ROM
50 CPU
52 control means 60 standby power supply monitoring means 62 main power supply monitoring means 64, 65 active time control means 66 abnormality determination means 68 switching signal generation means 70, 71 route setting means 72 route selection means 74 remaining amount information requesting means 75 remaining amount information transmission Means 76 Remaining amount information receiving means 78 Route determining means 100 Ad hoc wireless communication network 110 Source node 121, 122, 123 Relay node 130 Destination node

Claims (7)

A main power source, a rechargeable standby power source, a switching unit that switches between the main power source and the standby power source according to an output of the main power source, a control unit that generates a transmission interval switching signal, and the transmission interval switching signal A wireless terminal device including a transceiver that switches a transmission interval in response,
The controller is
Main power monitoring means for monitoring the output of the main power;
Standby power monitoring means for monitoring the remaining amount of the standby power;
The presence or absence of the output of the main power source is determined, and if the result of the determination is that there is no output of the main power source, the active time during which the transceiver performs transmission is set to the shortest while the output of the main power source is present The active time control means for setting the active time according to the remaining amount of the standby power,
An ad hoc wireless communication network terminal device comprising switching signal generation means for generating the transmission interval switching signal for switching the transmission interval in the transceiver according to the set active time. A main power source, a rechargeable standby power source, a switching unit that switches between the main power source and the standby power source according to an output of the main power source, a control unit that generates a transmission interval switching signal, and the transmission interval switching signal A wireless terminal device including a transceiver that switches a transmission interval in response,
The controller is
Main power monitoring means for monitoring the output of the main power;
State monitoring means for monitoring the state of the main power source;
Standby power monitoring means for monitoring the remaining amount of the standby power;
The presence / absence of output of the main power supply and the presence / absence of abnormality of the main power supply are determined.If the result of the determination is that there is no output of the main power supply and the main power supply is abnormal, the transceiver is The active time for transmission is set to the shortest. On the other hand, if there is no output from the main power supply and the main power supply is normal, or there is an output from the main power supply, the active time is set as the spare time. Active time control means for setting according to the remaining amount of power, and switching signal generating means for generating the transmission interval switching signal for switching the transmission interval in the transceiver according to the set active time. An ad hoc wireless communication network terminal device. Ad hoc wireless communication in which the ad hoc wireless communication network terminal device includes a transmission source terminal device, a destination terminal device, and relay terminal devices belonging to a plurality of paths set between the transmission source terminal device and the destination terminal device When used in a network,
The control unit further includes:
Route selection means for selecting a plurality of routes from the transmission source terminal device to the destination terminal device;
A remaining amount information requesting unit for requesting information on the remaining amount of standby power of each of the plurality of relay terminal devices to the plurality of relay terminal devices;
Remaining amount information receiving means for receiving information on the remaining amount of standby power generated in each of the plurality of relay terminal devices in response to the request;
3. A route determination unit that compares the received remaining amounts of the plurality of standby power sources and determines a route with the relay terminal device having the largest remaining amount as a transmission destination terminal. 4. An ad hoc wireless communication network terminal device according to claim 1. In setting the transmission interval in the transceiver provided in the terminal device in the ad hoc wireless communication network terminal device,
A monitoring process for monitoring the output of the main power supply and the remaining power of the standby power supply;
A determination process for determining the presence or absence of the output of the main power supply;
In the determination process, when it is determined that there is no output from the main power supply, the active time during which the transceiver included in the terminal device performs transmission is set to the shortest, while the output from the main power supply is determined. And an active time setting step of setting an active time according to the remaining power of the standby power supply. An active time setting method for an ad hoc wireless communication network terminal device, comprising: In setting the transmission interval in the transceiver provided in the terminal device in the ad hoc wireless communication network terminal device,
A monitoring process for monitoring the output of the main power supply, the state of the main power supply, and the remaining amount of the standby power supply;
Determining whether or not there is an output of the main power supply, and if it is determined that there is no output of the main power supply, a determination process for determining whether or not there is an abnormality in the main power supply,
In the determination process, if it is determined that there is no output of the main power supply and that there is an abnormality in the main power supply, the active time during which the transceiver transmits is set to the shortest, while the output of the main power supply When it is determined that there is no abnormality in the main power supply, or when it is determined that there is an output of the main power supply, the active time of the standby power supply obtained by monitoring the standby power supply is determined. An active time setting method for an ad hoc wireless communication network terminal device, comprising: an active time setting process that is set according to a remaining amount.   The ad hoc radio | wireless communication network comprised including the terminal device for ad hoc radio | wireless communication networks of any one of Claims 1-3. An ad hoc wireless communication network in which an ad hoc wireless communication network terminal device includes a transmission source terminal device, a destination terminal device, and relay terminal devices belonging to a plurality of paths set between the transmission source terminal device and the destination terminal device In setting the transmission path of the transmission signal from the transmission source terminal device to the destination terminal device,
A route selection process for selecting a plurality of routes from the source terminal device to the destination terminal device;
A remaining amount information requesting process for requesting information on the remaining amount of standby power of each of the plurality of relay terminal devices to the plurality of relay terminal devices;
A remaining amount information receiving process for receiving information on the remaining amount of standby power generated in each of the plurality of relay terminal devices in response to the request;
An ad hoc wireless communication network comprising: a route determination step of comparing a plurality of received standby power remaining amounts and determining a route with the relay terminal device having the largest remaining power as a destination terminal device Transmission path setting method.

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