JP2010028168A - Wireless communication network system, wireless terminal, wireless communication method and wireless communication program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication network system reducing power consumption as the entire system by adaptively updating an intermittent cycle on the basis of the power consumption of a terminal during past communication, and also to provide a wireless terminal, a wireless communication method and a wireless communication program. <P>SOLUTION: The wireless communication network system comprises a plurality of wireless terminals which perform wireless data communication, and performs communication by packetized data directly with one of the wireless terminals or with all other wireless terminals through one or more other wireless terminals. The wireless terminal has a function of controlling the intermittent cycle, analyzes the transmission/reception state of the wireless terminal for a preset period, and extends or shortens a sleep period on the basis of an analyzed result. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technology of a wireless communication network in which a plurality of devices transmit and receive data by wireless communication, and more particularly to reduction in power consumption of wireless terminals in a system in intermittent wireless communication.

  In recent years, low power consumption in wireless communication network systems has been demanded. Therefore, as a method for suppressing power consumption, a method for reducing the duty ratio of the operating time of the wireless terminal has been proposed. However, when both the transmission side and the reception side wireless terminals have stopped operating, in order to enable communication between the transmission side and the reception side, the transmission side and the reception side are simultaneously switched to the operating state. It is necessary to let However, in order to shift the transmitting side and the receiving side wireless terminals that have stopped operating to the operating state at the same time, the receiving side needs to detect a transmitting side wireless terminal that starts transmission of information addressed to itself. As a method for detecting such a transmitting side wireless terminal, there are a method in which each wireless terminal intermittently shifts to a reception state and a method in which a beacon is transmitted.

In general, since a wireless terminal provided in a wireless communication network system is equipped with a battery or the like as a power source, it is important to suppress power consumption of the wireless terminal.
For example, in the case of a multi-hop wireless network represented by a wireless communication network system, power consumption during data communication is larger than power consumption during reception standby. However, since the reception standby time occupies most of the wireless communication time in terms of time, the overall power consumption of the wireless communication network system is greatly influenced by the power consumption during reception standby.

  In Non-Patent Document 1, in order to suppress power consumption, an ad hoc mesh network in which a plurality of receiving nodes intermittently transmit their IDs and the transmitting nodes receive the IDs to start communication. The parameter values that determine the operation by simulating the effect on the basic performance such as packet collection rate, average packet delay, and power consumption, and the parameter setting method that further improves the basic performance are described.

  According to Patent Literature 1, in a wireless data communication system including a parent device connected to an external network and a plurality of child devices connected to the external network via the parent device, the parent device identifies the child device. A beacon signal including the communication unit identification information and the slave unit communication time zone assigned to the slave unit is transmitted, and the slave unit communicates with the master unit in the slave unit communication time zone assigned to the slave unit by the beacon signal. . In this way, a wireless data communication method for guaranteeing the communication band of the slave unit and reducing the power consumption of the slave unit, the master unit, and the slave unit have been proposed.

However, Patent Literature 1 does not adaptively update the intermittent period based on the power consumption of the terminal during past communication to reduce the power consumption of the entire system.
JP 2005-39632 A Ryo Fukushima, Masami Kanno, Masayuki Murata, Takayoshi Hayashi, Tatsuyuki Yozo, “Performance Evaluation of Low Power Ad hoc Mesh Network Based on Intermittent Operation”, Technical Research Report, IEICE Tech. 107 No. 525, The Institute of Electronics, Information and Communication Engineers, February 28, 2008

  An object is to provide a wireless communication network system, a wireless terminal, a wireless communication method, and a wireless communication program that adaptively update the intermittent period based on the power consumption of the terminal during past communication to reduce the power consumption of the entire system. To do.

  Data composed of a plurality of wireless terminals that perform wireless data communication, which is one aspect, packetized with all of the other wireless terminals directly or through one or more other wireless terminals. The wireless terminal of the wireless communication network system that performs communication according to the above includes a control unit and an intermittent period determination unit.

  The control unit includes a wireless transmission unit and a wireless reception unit for communicating between the wireless terminals, and another wireless that has received the ID notification signal after a transmission state in which an ID notification signal for identifying the wireless terminal is transmitted. The wireless terminal that has transmitted the ID notification signal from the terminal is shifted to a reception state of a transmission signal that transmits the data, and the wireless terminal is shifted to a sleep period intermittently after the reception state, and the wireless terminal A transmission event generated when communication is required between terminals is detected, and if it is the sleep period, a transition is made to a reception waiting state in order to receive the ID notification signal transmitted from another wireless terminal. When the received ID notification signal is recognized as a wireless terminal detected at the time of occurrence of the transmission event, a transition is made to a transmission state in which the transmission signal is transmitted.

  The intermittent cycle determination unit analyzes a transmission / reception state of the wireless terminal for a preset period, generates intermittent cycle change information that is an instruction to extend or shorten the sleep period based on the analysis result, and transmits the intermittent cycle change information to the control unit. Notice. And the said control part will determine whether it is extended or shortened if the said intermittent period change information is acquired, and performs control which changes the said sleep period.

As described above, it is possible to adaptively update the intermittent period based on the power consumption of each terminal during the past communication, thereby reducing the power consumption of the entire system.
Further, the control unit extends or shortens the sleep period based on an intermittent change amount that changes an intermittent period corresponding to the extension or shortening set in the intermittent period change information.

  In addition, the intermittent cycle determination unit receives the transmission signal that transmits the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal. Measure the power until the end of the state, measure the power for the preset period, the intermittent operation power obtained by adding the measurement result, and the power from the start to the end of the reception waiting state to receive the ID notification signal, The result calculated based on the cumulative power of the ID reception waiting power obtained by adding the measurement result for a preset period is compared with the condition set value for changing the preset intermittent period, and based on the comparison result The intermittent cycle change is an instruction to extend or shorten the sleep period by an intermittent cycle change amount for changing the intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. To generate the information.

  Further, the intermittent cycle determination unit records the first condition to the third condition, and if the first condition is satisfied, a value obtained by subtracting the cumulative power of the ID reception waiting power from the intermittent operation power is calculated in advance. When it is larger than the first condition set value for changing the set intermittent period, the intermittent period is extended, and the second condition is a value obtained by subtracting the intermittent operation power from the cumulative power of the ID reception waiting power, When the preset intermittent period is greater than the second condition set value, the intermittent period is shortened, and the third condition is when the accumulated power of the ID reception waiting power is greater than the third condition set value. Extend the intermittent period.

  The intermittent cycle determination unit transmits the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period. The number of data transmissions obtained by counting the number of transmissions of the transmission signal to be transmitted, and the wireless that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal for the preset period. Compare the result calculated based on the number of times of reception of data received by counting the number of times of reception of the transmission signal for transmitting the data to the terminal, and the condition setting value for changing the preset intermittent period, and compare Based on the result, the sleep period is extended by an intermittent period change amount for changing the intermittent period corresponding to the extension or shortening set in the intermittent period change information. Other generates the intermittent period change information is an instruction to shorten.

  In addition, the intermittent cycle determination unit records the fourth condition to the seventh condition, and a value obtained by subtracting the data reception count from the data transmission count changes a preset intermittent cycle. When the condition is larger than the fourth condition set value, the intermittent period is extended. The fifth condition is that the value obtained by subtracting the data transmission count from the data reception count is used to change the preset intermittent period. When larger than the fifth condition set value, the intermittent period is shortened, and when the number of data transmissions is larger than the sixth condition set value, the sixth condition extends the intermittent period, and the seventh condition When the number of data receptions is greater than the seventh condition set value, the intermittent period is shortened.

  The intermittent cycle determination unit obtains the intermittent operation power, the cumulative power of the ID reception waiting power, the data transmission count, and the data reception count, and prioritizes the first to seventh conditions in order. Judgment is made and the intermittent period is changed.

The determination is performed in the order of the third condition, the sixth condition, the seventh condition, the first condition or the second condition, the fourth condition, or the fifth condition.
The control unit extends or shortens the reception waiting state in order to receive the ID notification signal based on an intermittent cycle change amount that changes an intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information.

  It is possible to adaptively update the intermittent period based on the power consumption of each terminal during past communication to reduce the power consumption of the entire system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Example 1
(Communication network)
FIG. 1 is a schematic diagram showing communication paths of a plurality of wireless terminals constituting a wireless communication network. The wireless terminals A to J perform wireless communication using packets. Moreover, the solid line and the arrow solid line which connect between the radio | wireless terminals shown in FIG. 1 have shown the direction between the radio | wireless terminals which can be transmitted / received.

  In addition, each wireless terminal has configuration information indicating the relationship between the number of communications performed until the packet to be transmitted reaches the destination wireless terminal and the destination wireless terminal that reaches the number of communications as the minimum number of communications. Have.

  The configuration information of the wireless terminal A will be described. The configuration information of the wireless terminal A includes B, C, and D as wireless terminals that can transfer a packet by one communication. There are E and F for wireless terminals that require at least two communications in order to transfer packets, including communications by relay wireless terminals. Similarly, there are G, H, and I for wireless terminals that require at least three communications, and J for wireless terminals that require at least four communications.

The wireless terminals B to J also have the same configuration information as the wireless terminal A.
(Data structure of configuration information)
FIG. 2 is a diagram illustrating a data structure of the configuration information of the wireless terminals A, B, E, and G illustrated in FIG.

A case where the destination wireless terminal J is searched from the configuration information of the wireless terminals B, C, and D managed by the wireless terminal A will be described.
It can be seen from the configuration information in FIG. 2 that the wireless terminal J is located at the place where the number of communication is 3 from the wireless terminals B, C, and D. Since the number of communication is the same regardless of which of the wireless terminals B, C, and D is transferred, the wireless terminal A arbitrarily selects a packet transfer destination. Here, it is assumed that B is selected.

  The wireless terminal B searches for the destination wireless terminal J from the configuration information of the wireless terminals A, C, E managed by itself. It can be seen that the wireless terminal J is located at a place where the number of communications is 4 from the wireless terminal A, a place where the number of communications is 3 from the wireless terminal C, and a place where the number of communications is 2 from the wireless terminal E.

  Accordingly, the wireless terminal B transfers the packet to the wireless terminal E when it is determined that it is most efficient to transfer the packet having the wireless terminal J as the destination to the wireless terminal E.

  Similarly, the wireless terminal E searches for the destination wireless terminal J from the configuration information of the wireless terminals B, C, F, and G managed by itself. The wireless terminal J has a place with the number of communication 3 from the wireless terminal B, a place with the communication number 3 from the wireless terminal C, a place with the communication number 2 from the wireless terminal F, and a place with the communication number 1 from the wireless terminal G. Therefore, the wireless terminal E transfers the packet having the wireless terminal J as the destination to the wireless terminal G.

  When the wireless terminal G receives a packet whose destination is the wireless terminal J, the wireless terminal J recognizes from the configuration information managed by itself that the wireless terminal J is a wireless terminal capable of direct communication, and directly transmits the packet to the wireless terminal J. Send.

The communication packet transmitted from the wireless terminal A arrives at the wireless terminal J by the procedure described above.
When a new communication channel is set in the system or when a communication channel that has been valid until now becomes invalid, the configuration information managed by each wireless terminal is updated.

  In addition, when relaying a number of packets in this way, the communication path may be temporarily interrupted due to a communication failure caused by an obstacle or the like, and the packet may not be transferred to the destination. In order to cope with such a case, when the packet is normally transferred between the respective direct communication paths, the wireless terminal that has received the packet transmits the packet to the wireless terminal that has transmitted the packet. A response indicating that it has been received is returned.

(Configuration of wireless terminal)
FIG. 3 is a block diagram illustrating a configuration of each of the wireless terminals A to J illustrated in FIGS. 1 and 2. Note that the receiving terminal 11a (a wireless terminal that transmits an ID notification signal is referred to as a receiving terminal) and a transmitting terminal 11b (a wireless terminal that is waiting to receive an ID notification signal is referred to as a transmitting terminal) illustrated in FIG. -J is shown. In addition, in the configuration diagrams and the timing charts showing the operation timing shown in FIGS. 3 to 7, the wireless terminal is divided into the transmitting side and the receiving side in order to simplify the explanation, but the actual wireless terminal is the receiving terminal (operation It has functions of a state control unit 31a) and a transmission terminal (operation state control unit 31b).

(Configuration of receiving terminal)
The reception terminal 11a includes a control unit 12a, a wireless transmission unit 13a, a wireless reception unit 14a, a transmission / reception switching unit 15a, an antenna 16a, a battery 17a, an interface 18a, a switch 19a, and a switch 20a. The receiving terminal 11a has configuration information in the memory.

  The control unit 12a includes an operation state control unit 31a, a data transmission control unit 35a, and an ID notification signal determination unit 36a, and controls data transmission / reception. The control unit 12a can use an information processing device such as a CPU (having a memory).

The operation state control unit 31a includes a first transmission state control unit 32a, a first reception state control unit 33a, and an intermittent operation control unit 34a.
The wireless transmission unit 13a modulates data and transmits the data wirelessly to the target wireless terminal.

The wireless receiving unit 14a receives and demodulates a signal transmitted from the wireless terminal.
The transmission / reception switching unit 15a performs transmission / reception switching control by a control signal (not shown) from the control unit 12a. For example, switching is controlled by the intermittent operation control unit 34a.

The antenna 16a transmits data modulated for wireless communication with the wireless terminal, and receives a signal transmitted from the wireless terminal.
The battery 17a supplies power for the wireless transmission unit 13a, the wireless reception unit 14a, and the control unit 12a. Moreover, it will not be limited if it supplies electric power.

  The interface 18a exchanges data with the host device. Note that examples of the host device that exchanges data via the interface 18a include an information processing device, a switch, a sensor, and a display.

The switch 19a is controlled by the first transmission state control unit 32a to turn on / off the power of the wireless transmission unit 13a.
The switch 20a is controlled by the first transmission state control unit 33a to turn on / off the power of the wireless reception unit 14a.

The data transmission control unit 35a is connected to the ID notification signal determination unit 3a and the host device, and performs transmission control of transmission data based on the control signals and data contents transferred from these units.
The ID notification signal determination unit 36a identifies the wireless terminal based on the received data content.

Next, the operation state control unit 31a will be described.
The first transmission state control unit 32a is connected to the data transmission control unit 35a and the intermittent operation control unit 34a, and controls the switch 19a based on the data transmitted from the data transmission control unit 35a and the intermittent operation control unit 34a.

  The first reception state control unit 33a is connected to the data transmission control unit 35a and the intermittent operation control unit 34a, and controls the switch 20a based on the data transmitted from the data transmission control unit 35a and the intermittent operation control unit 34a.

  The intermittent operation control unit 34a controls the first transmission state control unit 32a and the first reception state control unit 33a based on the time value measured by the timer, and intermittently operates the wireless transmission unit 13a or the wireless reception unit 14a. To migrate.

  Further, the control unit 12a enters a sleep state in order to keep the power consumption of the control unit 12a itself to a minimum, and shifts to an operation state after a certain time based on a time value measured by a timer provided in the control unit 12a. Can do.

(Configuration of sending terminal)
The transmission terminal 11b includes a control unit 12b, a wireless transmission unit 13b, a wireless reception unit 14b, a transmission / reception switching unit 15b, an antenna 16b, a battery 17b, an interface 18b, a switch 19b, and a switch 20b. Further, the transmission terminal 11b has configuration information in the memory.

  The control unit 12b includes an operation state control unit 31b, a data transmission control unit 35b, and an ID notification signal determination unit 36b, and controls data transmission / reception. The control unit 12b can use an information processing device such as a CPU.

The operation state control unit 31b includes a second transmission state control unit 32b, a second reception state control unit 33b, and an intermittent operation control unit 34b.
The wireless transmission unit 13b modulates data and transmits the data wirelessly to a target wireless terminal.

The wireless receiving unit 14b receives and demodulates a signal transmitted from the wireless terminal.
The transmission / reception switching unit 15b performs transmission / reception switching control by a control signal (not shown) from the control unit 12b. For example, switching is controlled by the intermittent operation control unit 34b.

The antenna 16a transmits data modulated for wireless communication with a wireless terminal and receives signals transmitted from other wireless terminals.
The battery 17b supplies power for the wireless transmission unit 13b, the wireless reception unit 14b, and the control unit 12b. Moreover, it will not be limited if it supplies electric power.

  The interface 18b exchanges data with the host device. Note that examples of the host device that exchanges data via the interface 18a include an information processing device, a switch, a sensor, and a display.

The switch 19b is controlled by the second transmission state control unit 32b to turn on / off the power of the wireless transmission unit 13b.
The switch 20b is controlled by the second reception state control unit 33b to turn on / off the power of the wireless reception unit 14b.

The data transmission control unit 35b is connected to the ID notification signal determination unit 36b and the host device, and performs transmission control of transmission data based on the control signals and data contents transferred from these units.
The ID notification signal determination unit 36b identifies the wireless terminal based on the received data content.

Next, the operation state control unit 31b will be described.
The second transmission state control unit 32b is connected to the data transmission control unit 35b and the intermittent operation control unit 34b, and controls the switch 19b based on the data transmitted from the data transmission control unit 35b and the intermittent operation control unit 34b.

  The second reception state control unit 33b is connected to the data transmission control unit 35b and the intermittent operation control unit 34b, and controls the switch 20b based on the data transmitted from the data transmission control unit 35b and the intermittent operation control unit 34b.

  The intermittent operation control unit 34b intermittently shifts the wireless transmission unit 13b or the wireless reception unit 14b to the operation state. That is, the operation state control unit 31b enters a sleep state in order to keep the power consumption of the control unit 12b itself to a minimum, and waits for reception when a transmission event occurs based on a time value measured by a timer provided in the control unit 12b. Transition to the state, and then transition to the transmission state.

(Description of operation)
4A and 4B are timing diagrams showing intermittent transmission / reception operations of the wireless communication network of FIG. 4A shows the operating state of the receiving terminal 11a, FIG. 4B shows the operating state of the transmitting terminal 11b, and FIGS. 4A and B show the time axis on the horizontal axis.

  The receiving terminal 11a in FIG. 4A is in an operating state during the periods TT and TR. The period TT is a period during which the transmission state T11 can be executed. The period TR is a period during which the reception state R11 can be executed.

  The transmission state T11 is a state in which a signal can be transmitted to notify the transmission terminal 11b that the reception terminal 11a is in an operating state. The transmission / reception switching unit 15a is switched to the transmission side, the switch 19a is turned on, power is supplied to the wireless transmission unit 13a, and an ID notification signal can be transmitted from the data transmission control unit 35b. At this time, the switch 19a is turned off.

  The reception state R11 is a state in which the reception terminal 11a can receive a signal transmitted from the transmission terminal 11b. The transmission / reception switching unit 15a is switched to the reception side, the switch 19a is turned on, power is supplied to the wireless reception unit 14a, and a signal transmitted from the transmission terminal 11b can be received. At this time, the switch 20a is turned off.

  In the time chart shown in FIG. 4A, following the transmission state T11 for notifying the transmission terminal 11b that the reception terminal 11a is in the operation state, the state shifts to the reception state R11 for receiving data transmitted from the transmission terminal 11b. Let

Thereafter, the operation state control unit 31a performs control to intermittently repeat the transmission state T11 in the period TT and the reception state R11 in the subsequent period TR while leaving the sleep period TS.
The operation period can be made sufficiently shorter than the sleep period TS, and the power consumption of the receiving terminal 11a satisfies the following expression (1).

(TT × PT + TR × PR) << PR × (TT + TR + TS) (1)

Here, PT is the power consumed by the wireless transmission unit 13a and the control unit 12a during transmission. PR is the power consumed by the wireless reception unit 14a and the control unit 12a during reception.

The power consumed in the period (TT + TR + TS) can be reduced by the expression (1) as compared with the case where the wireless reception unit 14a is always in the reception state.
Next, in response to the occurrence of the transmission event J11, the receiving terminal 11a in FIG. 4B causes the transmitting terminal 11b to shift to the reception waiting state R12 in order to receive a signal notifying that the receiving terminal 11a is in the operating state. . The transmission / reception switching unit 15b is switched to the reception side, the switch 20b is turned on, power is supplied to the wireless reception unit 14b, and a signal transmitted from the reception terminal 11a can be received. At this time, the switch 19b is turned off.

  The transmission state T12 is a state in which the transmission terminal 11b can transmit a signal to the reception terminal 11a. The transmission / reception switching unit 15b is switched to the transmission side, the switch 19b is turned on, power is supplied to the wireless transmission unit 13b, and a signal such as data can be transmitted from the data transmission control unit 35b. At this time, the switch 20b is turned off.

  The transmission event J11 is generated when the transmission terminal 11b receives a transmission command from the host device, battery voltage information generated inside the transmission terminal 11b, data relayed from other wireless terminals, and the like.

When the transmission event J11 occurs, the transmission terminal 11b determines which reception terminal 11a (a plurality of wireless terminals in FIG. 1) should transmit data.
When the transmission terminal 11b receives data indicating that the reception terminal 11a is the transmission partner in the reception wait state R12 illustrated in FIG. 4B, the second transmission state control unit 32b transmits the data to the reception terminal 11a in the operating state. In order to do so, the state is shifted to the transmission state T12.

Further, when the transmission event J11 occurs, the transmission terminal 11b enters the reception waiting state R12 for a certain time TW. The fixed time TW can be set so as to satisfy the expressions (2) and (3) so that the transmission states T11 of all receiving terminals 11a that can be received can be confirmed.

TW> TT + (TT + TR + TS) (2)

However, considering the case where the transmission state T11 of the receiving terminal 11a cannot be confirmed due to a communication error or the like, the following equation is used so that the transmission state T11 of the receiving terminal 11a can be confirmed N times (N is an integer of 2 or more) times. The predetermined time TW can be set so as to satisfy.

TW> TT + N × (TT + TR + TS) (3)

(Description of operation)
5A and 5B are flowcharts illustrating an intermittent communication method of a wireless communication network. FIG. 5C is a timing diagram illustrating an example of an intermittent communication method for a wireless communication network.

The operation on the receiving terminal 11a side will be described with reference to FIGS. 5A and 5C.
In step S51, the control unit 12a shifts to an operation state in the operation period (TT + TR) shown in FIG. 5C by the receiving terminal 11a, and the control unit 12a turns on the switch 19a and transmits power to the wireless transmission unit 13a in the transmission period TT. Is transmitted to the transmission state T11. The ID notification signal P11 is transmitted to the transmission terminal 11b during the period TT that is the transmission state T11. The ID notification signal is a code unique to the wireless terminal, and is data for identifying the wireless terminal.

  In step S52, in the reception period TR following the transmission period TT, the control unit 12a turns on the switch 20a and supplies power to the radio reception unit 14a, thereby causing the radio reception unit 14a to shift to the reception state R11. It waits for a transmission signal P12 transmitted from the transmission terminal 11b. The transmission signal has data to be transferred to the target wireless terminal.

  In step S53, the control unit 12a turns off the switch 19a and the switch 20a after the transmission state T11 of the predetermined period TT and the subsequent reception state R11 of the predetermined period TR, and turns off the power of the wireless transmission unit 13a and the wireless reception unit 14a. By doing so, the control unit 12a enters the sleep state while shifting to the sleep period TS.

  As described above, the control unit 12a intermittently repeats the transmission state T11 of the certain period TT and the subsequent reception state R11 of the certain period TR while leaving the interval of the sleep period TS (repeats Steps S51 to S53).

The operation on the transmission terminal 11b side will be described with reference to FIGS. 5B and 5C.
On the transmission terminal 11b side, the control unit 12b turns off the switches 19b and 20b until the transmission event J11 occurs, thereby turning off the power of the wireless transmission unit 13b and the wireless reception unit 14b, and the control unit 12b is in the sleep state. Migrate to

  In step S54, when the transmission event J11 occurs, the control unit 12b turns on the switch 20b to supply power to the wireless reception unit 14b, and shifts the wireless reception unit 14b to the reception waiting state R12 for a predetermined time TW.

  In step S55, it is determined whether an ID notification signal (intermittent transmission signal) has been received from the target wireless terminal. That is, when the ID notification signal P11 is received by the transmission terminal 11b in the reception waiting state R12, the transmission terminal 11b receives the reception terminal 11a based on the identification code of the reception terminal 11a included in the ID notification signal P11. Determine if is the sending partner. In step S51, the wireless transmission unit 13a is shifted to the transmission state T11 on the reception terminal 11a side, and the wireless transmission unit 13a transmits the ID notification signal P11 via the antenna 16a, and is transmitted by the transmission terminal 11b in the reception waiting state R12. When the ID notification signal P11 is received, the process proceeds to step S57. When it cannot be received, the process proceeds to step S56. The determination is made by the ID notification signal determination unit 36b.

A unique code for identifying the wireless terminal is set in the ID notification signal P11. In this example, an identification code indicating the receiving terminal 11a is set.
In step S56, it is determined whether or not the ID notification signal P11 is received during the maximum waiting time TW in the reception waiting state R12 that satisfies the expression (2) recorded in the memory or the like. If it is within the range of TW time, the process proceeds to step S55. If it is outside the TW time (timeout), the process proceeds to step S58.

In step S57, when it is confirmed that the reception terminal 11a is the transmission partner, the transmission terminal 11b shifts to the transmission state T12 and transmits the transmission signal P12 to the reception terminal 11a.
In step S58, the process proceeds to a sleep process. That is, the control unit 12b enters a sleep state until the next transmission event.

  As described above, even when the ID notification signal P11 is transmitted from the reception terminal 11a asynchronously with the reception waiting state R12, the ID notification signal P11 is received by all the transmission terminals 11b existing in the receivable place. It is possible to reliably notify the transmission terminal 11b of the operating state of the reception terminal 11a.

  Here, on the receiving terminal 11a side, if the ID notification signal P11 is transmitted in the transmission state T11, it is possible to shift to the reception state R11 immediately after that, so when the transmission terminal 11b is in the transmission state T1, the receiving terminal 11a It can be in the reception state R11, and the reception terminal 11a can receive the transmission signal P12 transmitted from the transmission terminal 11b without synchronizing between the reception terminal 11a and the transmission terminal 11b.

  In addition, when the transmission event J11 occurs in the transmission terminal 11b and the state shifts to the reception waiting state R12 for receiving the ID notification signal P11 from the reception terminal 11a, the environment of the radio wave to be transmitted fluctuates and the time phase is strong. When the ID notification signal P11 cannot be received due to an error, the transmission terminal 11b in which the transmission event J11 has occurred continues the reception waiting state R12 for TW time or more. That is, when the ID notification signal P11 cannot be received during the reception waiting state R12, the reception waiting state R12 is extended until the ID notification signal P11 is received. Thereafter, when the ID notification signal P11 is received, the state shifts to the transmission state T12 and the transmission signal P12 is transmitted.

  In addition, in order to prevent the ID notification signal P11 from being received during the extended reception waiting state R12, a timeout time TO is set in advance in the extended reception waiting state R12, and when the timeout time TO is exceeded. The extended reception waiting state R12 is canceled and the operation proceeds to the next operation.

  In this way, immediately before the reception terminal 11a receives the data transmitted from the transmission terminal 11b, it is possible to notify the transmission terminal 11b that the reception terminal 11a is in an operating state, and the transmission terminal 11b. On the side, it is possible to wait in the reception waiting state R12 before transmitting data to the receiving terminal 11a side.

  Even when the receiving terminal 11a intermittently repeats the operation state, the receiving terminal 11a receives the data when the receiving terminal 11a is in the operating state without synchronizing the operation timing between the receiving terminal 11a and the transmitting terminal 11b. In addition, since the transmission terminal 11b does not need to continue the transmission state T12 for a long time in order for the transmission terminal 11b to capture the reception terminal 11a, transmission can be performed while reducing power consumption during transmission / reception. The occupied time of the space channel during operation can be reduced.

  In addition, when the transmitting terminal 11b confirms that the receiving terminal 11a is a transmission partner based on the code unique to the receiving terminal 11a included in the ID notification signal P11, the transmitting terminal 11b receives the signal immediately thereafter. You may make it cancel waiting state R12.

  In addition, it is possible to reliably confirm whether or not the receiving terminal 11a is the transmission partner of the current data on the transmitting terminal 11b side, and shorten the time during which the transmitting terminal 11b is in the reception waiting state R12. Thus, the power consumption of the transmission terminal 11b can be reduced.

(Example 2)
A function for the transmission terminal 11b to confirm whether data is transmitted to the reception terminal 11a is added to the control unit 12a and the control unit 12b described in the first embodiment.

FIG. 6 is a timing diagram illustrating another example of the intermittent communication method of the wireless communication network according to the second embodiment.
In FIG. 6, on the receiving terminal 11a side, the transmission state T11 for a certain period TT and the subsequent reception state R11 for a certain period TR are repeated intermittently with an interval of the sleep period TS. On the transmission terminal 11b side, when a transmission event J11 occurs, the transmission terminal 11b shifts to the reception waiting state R12 for a predetermined time TW.

  When the receiving terminal 11a side shifts to the transmission state T11, the ID notification signal P11 is transmitted (step S51). The ID notification signal P11 is received by the transmitting terminal 11b in the reception waiting state R12 (step S54). Then, when the ID notification signal P11 is received by the transmission terminal 11b in the reception waiting state R12, the transmission terminal 11b receives the reception terminal based on the code unique to the reception terminal 11a included in the ID notification signal P11. It is determined whether 11a is a transmission partner (step S55).

When it is confirmed that the receiving terminal 11a is the transmission partner, the transmitting terminal 11b shifts to the transmission state T12 and transmits the transmission signal P12 to the receiving terminal 11a (step S57).
Furthermore, the receiving terminal 11a according to the second embodiment demodulates the received signal by the wireless receiving unit 14a to confirm that the transmission signal P12 received in the reception state R11 in the period TR is a signal transmitted from the transmitting terminal 11b. A determination is made based on the demodulated data. That is, a step is provided for determining whether the signal received in step S52 shown in FIG. 5 is a signal transmitted from the transmission terminal 11b. This determination is performed by the ID notification signal determination unit 35a (determination step of the transmission signal P12).

  In addition, when receiving the transmission signal P12 transmitted from the transmission terminal 11b, the reception terminal 11a shifts to a transmission state T13 and transmits a response signal P15 to the transmission signal P12 to the reception terminal 11a (response signal P15 transmission step).

  Here, the transmission state T13 is a state in which the receiving terminal 11a can transmit a signal to the transmitting terminal 11b. The transmission / reception switching unit 15a is switched to the transmission side, the switch 19a is turned on, power is supplied to the wireless transmission unit 13a, and a signal such as data can be transmitted from the data transmission control unit 35a. At this time, the switch 20a is turned off.

When the response signal P15 is transmitted, the process proceeds to the sleep process. This sleep process is the same as step S53.
Next, when the transmission terminal 11b according to the second embodiment transmits the transmission signal P12 in the transmission state T12 of the period TW in step S57, the transmission terminal 11b shifts to the reception state R13.

  Here, the reception state R13 is a state in which the transmission terminal 11b can receive the response signal P15 from the reception terminal 11a. The transmission / reception switching unit 15b is switched to the reception side, the switch 20b is turned on, and power is supplied to the wireless transmission unit 13b. At this time, the switch 20b is turned off (response signal P15 reception step).

  When the transmission terminal 11b receives the response signal P15 and confirms that it is a response signal, the reception waiting state R13 is stopped and the process proceeds to a sleep process (response signal P15 determination process). Here, the sleep process is the same as step S58.

If the response signal P15 cannot be received within the TW time, it may be recorded that there is no response signal.
In this way, the transmission terminal 11b can reliably confirm whether or not data has been transmitted to the reception terminal 11a, and the time during which the transmission terminal 11b is in the reception waiting state R12 can be shortened. It is possible to reduce the power consumption of the transmission terminal 11b while ensuring the reliability of communication.

(Example 3)
FIG. 7 is a timing diagram illustrating still another example of the intermittent communication method of the wireless communication network according to the third embodiment.

  In FIG. 7, it is assumed that the transmission terminal 11b communicates with a plurality of reception terminals 11a and 11c. The receiving terminal 11c can have the same configuration as the receiving terminal 11a in FIG.

  On the receiving terminals 11a and 11c side, the transmission state T11 of the fixed period TT and the subsequent reception state R11 of the fixed period TR are intermittently repeated with an interval of the sleep period TS (steps S51 to S53).

On the transmission terminal 11b side, when the transmission event J11 for the reception terminal 11a occurs, the transmission terminal 11b shifts to the reception waiting state R12 for a predetermined time TW.
When the receiving terminal 11a side shifts to the transmission state T11, the ID notification signal P11 is transmitted, and the ID notification signal P11 is received by the transmission terminal 11b in the reception waiting state R12 (step S51). Then, when the ID notification signal P11 is received by the transmission terminal 11b in the reception waiting state R12 (step S54), the transmission terminal 11b is based on the unique code of the reception terminal 11a included in the ID notification signal P11. Then, it is determined whether or not the receiving terminal 11a is a transmission partner (step S55).

  When it is confirmed that the receiving terminal 11a is the transmission partner, the transmitting terminal 11b shifts to the transmission state T12 and transmits the transmission signal P12 to the receiving terminal 11a (step S57).

  When receiving the ID notification signal P11, the receiving terminal 11a shifts to the receiving state R11 (step S52). The transmission signal P12 transmitted from the transmission terminal 11b can be received.

  In the third embodiment, steps S54 to S58 are executed, and when the transmission event J12 for the reception terminal 11c occurs during the reception waiting state R12 in the transmission terminal 11b, the transmission terminal 11b transmits the transmission signal P12 to the reception terminal 11a. Thereafter, the reception waiting state R12 is continued (continuation step of the reception waiting state R12).

  When the transmission event J12 occurs, the intermittent operation control unit 34b transmits the transmission signal P12 (after completing the state of T12), and then makes the reception terminal 11a receive the signal transmitted from the transmission terminal 11b. The transmission / reception switching unit 15a is switched to the reception side, the switch 19a is turned on, power is supplied to the wireless reception unit 14a, and the reception state R12 is set in which the ID notification signal P13 transmitted from the transmission terminal 11b can be received. At this time, the switch 20a is turned off.

When the receiving terminal 11c side shifts to the transmission state T11, an ID notification signal P13 (step S51) is transmitted.
The ID notification signal P13 is received by the transmission terminal 11b in the reception waiting state R12 (step S55).

  When the ID notification signal P13 is received by the transmission terminal 11b in the reception waiting state R12, the transmission terminal 11b receives the reception terminal 11c based on the code unique to the reception terminal 11c included in the ID notification signal P13. It is determined whether or not is a transmission partner (step S55).

When it is confirmed that the receiving terminal 11c is the transmission partner, the transmitting terminal 11b shifts to the transmission state T13 and transmits the transmission signal P14 to the receiving terminal 11c (step S57).
Thereafter, the transmission terminal 11b stops the transmission state T13 and shifts to a sleep process (step S58).

  In this way, even when transmission events J11 and J12 targeting a plurality of receiving terminals 11a and 11c occur in succession, transmission processing for the plurality of receiving terminals 11a and 11c is continued. Even when the receiving terminals 11a and 11c repeat the operation state intermittently, the data communication for the plurality of receiving terminals 11a and 11c can be performed efficiently.

Example 4
FIG. 8 is a block diagram illustrating a configuration of a wireless terminal configuring the wireless communication network according to the fourth embodiment.

The wireless terminal 111a (111b) is configured to have the functions of the receiving terminal 11a and the transmitting terminal 11b described in the first to third embodiments described above.
The wireless terminal 111a (111b) includes a control unit 112a (112b), a wireless transmission unit 113a (113b), a wireless reception unit 114a (114b), a transmission / reception switching unit 115a (115b), an antenna 116a (116b), and a battery 117a (117b). , Interface 118a (118b), switch 119a (119b), and switch 120a (120b). The receiving terminal 111a (11b) has configuration information in the memory.

  The control unit 112a (112b) includes an operation state control unit 131a (131b), a data transmission control unit 137a (137b), and an ID notification signal determination unit 138a (138b), and controls data transmission / reception. The control unit 112a (112b) can use an information processing device such as a CPU (having a memory).

  The operation state control unit 131a (131b) includes a first transmission state control unit 132a (132b), a second transmission state control unit 133a (133b), a first reception state control unit 134a (134b), and a second reception state control unit 135a ( 135b) and an intermittent operation control unit 136a (136b).

The wireless transmission unit 113a (113b) modulates data and transmits the data wirelessly to a target wireless terminal.
The wireless receiving unit 114a (114b) receives and demodulates a signal transmitted from the wireless terminal.

  The transmission / reception switching unit 115a (115b) performs transmission / reception switching control by a control signal (not shown) from the control unit 12a. For example, the intermittent operation control unit 136a (136b) controls switching.

The antenna 116a (116b) transmits data modulated for wireless communication with the wireless terminal and receives a signal transmitted from the wireless terminal.
The battery 117a (117b) supplies power to the wireless transmission unit 113a (113b), the wireless reception unit 114a (114b), and the control unit 112a (112b).

  The interface 118a (118b) exchanges data with the host device. Examples of the host device that exchanges data via the interface 118a (118b) include an information processing device, a switch, a sensor, and a display.

  The switch 119a (119b) is controlled by the first transmission state control unit 132a (132b) and the second transmission state control unit 133a (133b) to turn on / off the power of the wireless transmission unit 113a (113b).

  The switch 120a (120b) is controlled by the first reception state control unit 134a (134b) and the second reception state control unit 135a (135b) to turn on / off the power of the wireless reception unit 114a (114b).

  The data transmission control unit 137a (137b) is connected to the ID notification signal determination unit 138a (138b) and the host device, and performs transmission control of transmission data based on the control signals and data contents transferred from these units.

  The ID notification signal determination unit 138a (138b) identifies the wireless terminal based on the received data content. The ID notification signal determination unit 138a (138b) includes the functions of the ID notification signal determination units 36a and 36b described with reference to FIG. 3, and can have the functions described in the first to third embodiments.

Next, the operation state control unit 131a (131b) will be described.
The first transmission state control unit 132a (132b) and the second transmission state control unit 133a (133b) are connected to the data transmission control unit 137a (137b) and the intermittent operation control unit 136a (136b), and the data transmission control unit 137a ( 137b), the switch 119a (119b) is controlled based on the data transmitted from the intermittent operation control unit 136a (136b).

  The first reception state control unit 134a (134b) and the second reception state control unit 135a (135b) are connected to the data transmission control unit 137a (137b) and the intermittent operation control unit 136a (136b), and the data transmission control unit 137a ( 137b), the switch 119a (119b) is controlled based on the data transmitted from the intermittent operation control unit 136a (136b).

  Based on the time value measured by the timer, the intermittent operation control unit 136a (136b) is configured to include a first transmission state control unit 132a (132b), a second transmission state control unit 133a (133b), and a first reception state control unit 134a (134b). ), The second reception state control unit 135a (135b) is controlled, and the wireless transmission unit 113a (113b) or the wireless reception unit 114a (114b) is intermittently shifted to the operation state. The intermittent operation control unit 136a (136b) includes the functions of the intermittent control units 34a and 34b described with reference to FIG. 3 and can be provided with the functions described in the first to third embodiments.

  Further, the control unit 112a (112b) enters a sleep state in order to keep the power consumption of the control unit 112a (112b) itself to a minimum, and based on the time value measured by the timer provided in the control unit 112a (112b), It is possible to shift to an operating state after a certain time.

(Description of operation)
FIG. 9 is a timing diagram of intermittent communication of the wireless communication network of FIG.
In FIG. 9, a wireless terminal 111b communicates with a plurality of wireless terminals 111a and 111c. The wireless terminal 111c can have the same configuration as the wireless terminals 111a and 111b in FIG. Further, each wireless terminal performs the processing of steps S51 to S58 as in the flowcharts shown in FIGS. 5A and 5B. Note that the steps shown in the second and third embodiments may be combined.

  In the fourth embodiment, in the wireless terminals 111a to 111c, the transmission state T11 and the subsequent reception state R11 are intermittently repeated with the sleep state interposed therebetween. Further, when the transmission event J11 for the wireless terminal 111b occurs, the wireless terminal 111a shifts to the reception waiting state R12 for a predetermined time.

The transmission states T11 and T12, the reception states R11 and R12, and the transmission event J11 are not described here because they are described in the first to third embodiments.
When the wireless terminal 111b shifts to the transmission state T11, the ID notification signal P11 is transmitted (step S51).

The ID notification signal P11 is received by the wireless terminal 111a that is in the reception waiting state R12 (step S54).
When the ID notification signal P11 is received by the wireless terminal 111a that is in the reception waiting state R12, the wireless terminal 111a, based on the code unique to the wireless terminal 111b included in the ID notification signal P11, It is determined whether or not is a transmission partner (step S55).

When it is confirmed that the wireless terminal 111b is a transmission partner, the wireless terminal 111a shifts to the transmission state T12 and transmits the transmission signal P12 to the wireless terminal 111b (step S57).
When transmitting the ID notification signal P11, the wireless terminal 111b shifts to a reception state R11 and receives the transmission signal P12 transmitted from the wireless terminal 111a (step S52).

  When the transmission event J11 for the wireless terminal 111c occurs, the wireless terminal 111b shifts to a reception waiting state R12 (step S54), and performs transmission / reception to / from the reception waiting state R12 when the operation time of the transmission state T11 and the subsequent reception state R11 comes. Then, the process again shifts to the reception waiting state R12 (reception waiting interrupt step).

  In the wireless terminal 111b, the intermittent operation control unit 136b has the first transmission state control unit 132b and the first reception state control in order to give priority to the processing executed in T11 and R11 that occurs at a constant period even in the reception waiting state R12. The unit 134b controls the switches 119b and 120b to temporarily interrupt the reception waiting state R12. When the transmission signal P12 is received in the reception state R11, the reception signal R12 is triggered again to shift to the reception wait state R12.

  At this time, when the wireless terminal 111c shifts to the transmission state T11, the ID notification signal P13 is transmitted (step S51), and the wireless terminal 111b in the reception waiting state R12 receives the ID notification signal P13 (step S54). ).

  When the ID notification signal P13 is received by the wireless terminal 111b in the reception waiting state R12, the wireless terminal 111b, based on the code unique to the wireless terminal 111c included in the ID notification signal P13, It is determined whether or not is a transmission partner (step S55).

  When it is confirmed that the wireless terminal 111c is a transmission partner, the wireless terminal 111b shifts to the transmission state T12 and transmits the transmission signal P14 to the wireless terminal 111c (step S57).

When transmitting the ID notification signal P13, the wireless terminal 111c shifts to a reception state R11 and receives the transmission signal P14 transmitted from the wireless terminal 111b (step S52).
In addition, when a transmission event J11, J12 occurs in the wireless terminal 11b, when the reception waiting state R12 for receiving the ID notification signals P11, P13 from the wireless terminals 111a, 11c shifts to R12, the environment of the radio waves to be transmitted fluctuates. When the ID notification signals P11 and P13 cannot be received due to a strong error between time phases, the wireless terminal 111b in which the transmission event J11 or J13 has occurred continues the reception waiting state R12 for TW time or more. That is, when the ID notification signals P11 and P13 cannot be received during the reception waiting state R12, the reception waiting state R12 is extended until the ID notification signals P11 and P13 are received. Thereafter, when the ID notification signals P11 and P13 are received, the state shifts to the transmission state T12 and the transmission signal P12 is transmitted.

  In addition, in order to prevent the ID notification signal P11 from being received during the extended reception waiting state R12, a timeout time TO is set in advance in the extended reception waiting state R12, and when the timeout time TO is exceeded. The extended reception waiting state R12 is canceled and the operation proceeds to the next operation.

  In this manner, the transmission state T11 and the subsequent reception state R11 can be intermittently repeated in the same wireless terminals 111a to 111c during the reception waiting state R12, while reducing the space channel occupation time in bidirectional communication. Thus, it is possible to reduce power consumption during transmission and reception and to shift to a communication state asynchronously.

(Example 5)
FIG. 10 is a timing diagram of intermittent communication in the wireless communication network according to the fifth embodiment.
In the wireless terminals 111a and 111b, the transmission state T11 and the subsequent reception state R11 are intermittently repeated with the sleep state interposed therebetween. Further, when the transmission event J11 for the wireless terminal 111a occurs, the wireless terminal 111b shifts to the reception waiting state R12 for a predetermined time while interrupting the transmission state T11 and the subsequent reception state R11.

When the wireless terminals 111a and 111b shift to the transmission state T11, ID notification signals P11 and P13 are transmitted (step S51).
Here, when the wireless terminals 111a and 111b are simultaneously shifted to the transmission state T11, the transmission timings of the ID notification signals P11 and P13 coincide with each other, and the wireless terminal 111b in the reception waiting state R12 can receive the ID notification signal P13. (Step S55).

  If the timing of shifting to the transmission state T11 in the wireless terminals 111a and 111b is constant, once the transmission timings of the ID notification signals P11 and P13 match, the transmission timings of the ID notification signals P11 and P13 from the next time may also match. Becomes higher.

Therefore, in the wireless terminals 111a and 111b, the period of transition to the transmission state T11 and the subsequent reception state R11 is changed every time.
For example, in the wireless terminal 111a, the cycle of the transmission state T11 and the subsequent reception state R11 is TW + αR + TT, and in the wireless terminal 111b, the cycle of the transmission state T11 and the subsequent reception state R11 is TW + αB + TT (period changing step).

  αR and αB are values specific to the transmission timing of the ID notification signals P11 and P13 calculated by the wireless terminals 111a and 111b each time. For example, αR and αB are set to random values calculated on the basis of the identification code of each of the wireless terminals 111a and 111b and information about the passage of time. A calculation unit that performs the above calculation is provided in the control unit 112a (112b).

  Then, the wireless terminals 111a and 111b change the transmission state T11 and the period of the subsequent reception state R11 each time, so that the wireless terminal 111b enters the transmission state T11 after the transmission timings of the ID notification signals P11 and P13 match. Before shifting again, the wireless terminal 111a can shift again to the transmission state T11.

  When the wireless terminal 111a shifts again to the transmission state T11, the ID notification signal P13 is transmitted (step S51), and the wireless terminal 111b in the reception waiting state R12 receives the ID notification signal P13 (step S54).

  When the ID notification signal P13 is received by the wireless terminal 111b that is in the reception waiting state R12, the wireless terminal 111b, based on the code unique to the wireless terminal 111a included in the ID notification signal P13, It is determined whether or not is a transmission partner (step S55).

  When it is confirmed that the wireless terminal 111a is a transmission partner, the wireless terminal 111b shifts to the transmission state T12 and transmits the transmission signal P14 to the wireless terminal 111a (step S57).

On the other hand, when transmitting the ID notification signal P13, the wireless terminal 111a shifts to the reception state R11 and receives the transmission signal P14 transmitted from the wireless terminal 111b (step S52).
As a result, even when bidirectional communication is periodically performed between the wireless terminals 111a and 111b, it is possible to avoid collision of operation timings of the periodic transmission, and to reduce the space channel occupation time in the bidirectional communication. However, it is possible to reduce power consumption during transmission and reception and to shift to a communication state asynchronously.

(State transition of the present invention)
FIG. 11 is a state transition diagram illustrating an operation method of the wireless communication network described in the first to fifth embodiments.

In the state K11, the wireless terminals 111a and 111b in FIG. 8 periodically enter a sleep state. In the sleep state, the powers of the wireless transmission units 113a and 113b and the wireless reception units 114a and 114b are turned off, and the control units 112a and 112b themselves operate with low power, and only a timer necessary for restarting operates. It is in a state.

When the wireless terminal 111a or the wireless terminal 111b is in a sleep state, timers provided in the control units 112a and 112b measure a certain time. The fixed time is an intermittent time, and is the total time of the period TT (transmission state T11), the period TR (reception state R11), and the period TS. When it is time for the timer to transition to the transmission state T11 (period TT), the state transitions to the state K12 (transmission state T11) (TS UP).

When a transmission event occurs, the state transitions to state K16.
In state K12, an ID notification signal is transmitted in transmission state T11 (transmission processing). When the transmission process ends, the status transits to status K13.

  In the state K13, the state transits to the reception state R11 following the transmission state T11 and waits for reception. Then, when the reception waiting time has passed in the reception state R11 (TR UP), the state returns to the state K11 in the sleep state. In addition, when a transmission signal is received in the reception state R11, the state transitions to the state K14.

  In the state K14, a reception process is performed. If the received data is invalid, the process returns to the state K11 in the sleep state. When the transmission signal received in the reception state R11 is information (data) addressed to itself, the flow goes to the state K15.

In state K15, after data processing of the information addressed to itself is performed, the process returns to the sleep state (state K11).
In state K16, a transmission destination wireless terminal candidate is selected when a transmission event occurs.

The state K17 is a reception waiting state R12, and when it is time for the timer to transition to the transmission state T11 (period TT), the state K18 (transmission state T11) is transitioned to (TS UP).
Also, every time a transmission event occurs, the state transits to state K16 in order to select a destination wireless terminal candidate.

In addition, when an ID notification signal is received in the reception waiting state R12, the flow goes to the state K19.
The status K18 is a transmission state T11, and an ID notification signal is transmitted. When the transmission process ends, the process returns to the reception wait status K17 (state R12).

In the status K19, when the ID notification signal or the transmission signal is received, the status returns to the status K17 (reception waiting state R12) when the received data is invalid.
When it is determined that the data of the received transmission signal is information addressed to itself, the process transits to the status K20. If an ID notification signal is received, the state transitions to state K21.

In status K20, after processing the data of information addressed to itself, the process returns to status K17 (reception waiting state R12).
In the status K21, when the data received in the reception process is for informing the operating state of the wireless terminal, it is determined whether the wireless terminal is a transmission partner based on a code unique to the wireless terminal included in the data. To do. If it is confirmed that the wireless terminal is not the transmission partner, the process returns to the reception waiting state R12 (status K17). On the other hand, when it is confirmed that the wireless terminal is the transmission partner, the process proceeds to the status K22 (transmission state T12).

  In the status K22, the transmission signal is transmitted in the transmission state T12. When the transmission signal (transmission information) corresponding to the transmission event remains, the process returns to the reception waiting state R12 (status K17), and when all transmission processes are completed, the process returns to the sleep state (status K11).

(Example 6)
(Constitution)
FIG. 12 shows a configuration in which a power consumption calculation unit is provided in the block diagram described in FIG.

The wireless terminal 111a (111b) is configured to have the functions of the receiving terminal 11a and the transmitting terminal 11b described in the first to third embodiments described above.
The wireless terminal 111a (111b) includes a control unit 112a (112b), a wireless transmission unit 113a (113b), a wireless reception unit 114a (114b), a transmission / reception switching unit 115a (115b), an antenna 116a (116b), and a battery 117a (117b). , Interface 118a (118b), switch 119a (119b), and switch 120a (120b). The wireless terminal 111a (11b) has configuration information in the memory.

  The control unit 112a (112b) includes an operation state control unit 131a (131b), a data transmission control unit 137a (137b), an ID notification signal determination unit 138a (138b), and a power consumption calculation unit 139a (139b). Control transmission and reception.

The power consumption calculation unit 139a (139b) is connected to the power supply line of the battery 117a (117b), and calculates the power consumption of the battery 117a (117b).
When the power consumption exceeds a preset power consumption per fixed time, the intermittent operation control unit 136a (136b) is controlled to set the sleep period TS longer than the current time.

(Description of operation)
13A and 13B are flowcharts for changing the intermittent communication method based on the power consumption of the wireless terminal of the wireless communication network. FIG. 14 is a timing diagram when the intermittent communication method is changed based on the power consumption of the wireless terminal of the wireless communication network.

The operation of the wireless terminals 111a, 111b, and 111c will be described with reference to FIGS. 13A and 13B.
In step S131, the wireless terminals 111a and 111b shift to the transmission state T11 shown in the figure, and the control units 112a and 112b of each wireless terminal turn on the switches 119a and 119b and transmit power to the wireless transmission units 113a and 113b in the transmission period. To transmit the wireless transmission units 113a and 113b to the transmission state T11. When the wireless terminals 111a and 111b are in the transmission state T11, the ID notification signal P11 is transmitted to the wireless terminal 111c, respectively.

  In step S132, since the control units 112a and 112b shift from the transmission period to the reception period, the wireless reception units 114a and 114b are received by turning on the switches 120a and 120b and supplying power to the wireless reception units 114a and 114b. Transition to state R11. It waits for a transmission signal P12 transmitted from the wireless terminal 111b.

  In step S133 (intermittent time switching determination step), the intermittent operation control unit 136a is controlled. In this example, the power consumption amount w1 of the wireless terminal 111a calculated by the power consumption calculation unit 139a is compared with a power consumption comparison value w2 per predetermined time set in advance. As a result of the comparison, when the power consumption w1 is larger than the power consumption comparison value w2, the sleep period TS is set to the time t2 longer than the current time for the intermittent operation control unit 136a. When the power consumption w1 is smaller than the power consumption comparison value w2, the current sleep period TS is not changed as it is.

Here, the intermittent interval t1 is a period represented by the transmission state T11, the reception state R11, and the sleep period TS (initial value). The intermittent interval t2 is a period in which a time longer than the intermittent interval t1 is set as shown in the equation (4). Moreover, w1 is shown by the integrated current value per hour.

t2> t1 + α1 (4)

In step S134, the control unit 112a of the wireless terminal 111a turns off the switch 119a and the switch 120a after the transmission state T11 and the subsequent reception state R11, and turns off the power of the wireless transmission unit 113a and the wireless reception unit 114a. Transition to the sleep period TS. In addition, the control unit 12a enters a sleep state by itself. The same applies to the wireless terminal 111b.

As described in the above embodiment, the wireless terminal 111c actually continues the wireless communication while shifting to the reception states R11 and R12 and the transmission states T11 and T12.
Next, step S133 (intermittent time switching determination step) will be described.

In step S135, for example, the current accumulated value for the past one hour is calculated and recorded in the memory as the power consumption w1.
In step S136, the power consumption comparison value w2 per hour set in advance is compared with the power consumption w1 indicated by the integrated current value per hour. As a result of the comparison, when the power consumption amount w1 exceeds the power consumption comparison value w2, the process proceeds to step S138. If it does not exceed the power consumption comparison value w2, the process proceeds to step S137.

In step S137, the intermittent interval t1 is not changed as it is.
In step S138, an intermittent interval t2 is set. The intermittent interval t2 may be preset in the memory as a fixed value.

  Further, since the power consumption fluctuates per certain time, an extended time table is prepared as shown in FIG. The extension time table divides the power consumption comparison value w2 in stages, records a plurality of extension times for each divided range, selects the extension time α1 corresponding to the measured power consumption w1, and intermittently The time of the interval t2 is changed.

  In FIG. 15, if the power consumption w1 is in the range of “0 to X” indicated by the power consumption comparison value w2, the extension time “A” is selected, α1 is selected, and the intermittent interval t2 is calculated. Similarly, if it is in the range of “X to Y” indicated by the power consumption comparison value w2, the extension time “B” is selected. Similarly, if it is in the range of “Y to Z” indicated by the power consumption comparison value w2, it is extended. Select time “C”.

With the above, it is possible to reduce the power consumption of only the specific terminal due to the concentration of the load on the specific terminal.
(Example 7)
In the seventh embodiment, the intermittent determination of the sixth embodiment is not performed by extending the period t1 based on the power consumption of the battery, but by detecting a predetermined time zone and extending the period t1 based on the time. Do.

(Constitution)
In the seventh embodiment, the time detection unit is provided in the block diagram described with reference to FIG.
The wireless terminal 111a (111b) is configured to have the functions of the receiving terminal 11a and the transmitting terminal 11b described in the first to third embodiments described above.

  The wireless terminal 111a (111b) includes a control unit 112a (112b), a wireless transmission unit 113a (113b), a wireless reception unit 114a (114b), a transmission / reception switching unit 115a (115b), an antenna 116a (116b), and a battery 117a (117b). , Interface 118a (118b), switch 119a (119b), and switch 120a (120b). The receiving terminal 111a (111b) has configuration information in the memory.

  The control unit 112a (112b) includes an operation state control unit 131a (131b), a data transmission control unit 137a (137b), and an ID notification signal determination unit 138a (138b), and controls data transmission / reception.

  The time detection unit 1310 (see FIG. 22A) is provided in the control unit 112a (112b) or the like, and a clock IC or the like can be used. When the time detection unit 1310 detects that the time zone is recorded in advance in the memory, the time detection unit 1310 transfers a control signal to the intermittent operation control unit 136a (136b). The intermittent interval t1 is changed based on this control signal. Here, the intermittent interval t1 is a preset initial value.

The intermittent operation control unit 136 shown in FIG. 8 has a function of receiving a control signal from the time detection unit 1310 and changing the intermittent interval.
(Description of operation)
FIG. 16 is a diagram showing the communication frequency of the wireless communication network. In FIG. 16, the vertical axis indicates the communication frequency, and the horizontal axis indicates the time axis. In FIG. 16, the communication frequency a2 increases from the communication frequency a2 to the communication frequency a1 in the time zone (time1) from 9:00 to 11:00, and the communication frequency a1 is stable from 11:00 to 16:00 (time2). Thereafter, the communication frequency starts to gradually decrease from 16:00 to 18:00 (time 3) and stabilizes at the communication frequency a2 from 18:00 to 9:00 (time 4).

In FIG. 16, there is only one time zone in which the communication frequencies a1 and a2 change, but a plurality of periods from time 2 to 4 may exist.
FIG. 17 is a flowchart for changing the intermittent communication method according to the time zone of the wireless communication network. Also, the flow shown in FIG. 17 is used as the process of step S133 of the flowchart shown in FIG. 13A.

FIG. 18 is a timing chart when the intermittent communication method is changed depending on the time zone of the wireless communication network.
The operation of the wireless terminals 111a and 111b will be described.

In the seventh embodiment, similarly to the sixth embodiment, the wireless terminals 111a and 111b execute the processes of steps S131 to S134.
In this example, in step S133 (intermittent time switching determination step), the start time (9:00) and end time (18:00) of the time zone time2, which is the set time zone previously recorded in the memory by the time detection unit 1310. And instructing the intermittent operation control unit 136a to change the sleep period TS.

Details of step S133 will be described.
In step S171, the time detector 1310 detects the time and records it in the memory.
In step S172, it is determined whether or not the current time detected in S171 is in the range from the start time (9:00) to the end time (18:00) of the time zone time2, which is a preset time zone. As a result of the determination, if it is the set time zone, the process proceeds to step S173. If it is the set time zone, the process proceeds to step S174.

In step S173, since the communication frequency is high, the intermittent interval t1 is not changed.
In step S174, since the communication frequency is low, the interval is changed to the intermittent interval t3.
Here, the intermittent interval t1 is a period represented by the transmission state T11, the reception state R11, and the sleep period TS (initial value). Further, t3 is a period in which a time longer than the intermittent interval t1 is set as shown in the equation (5). α2 is the extension time.

t3> t1 + α2 (5)

(Modification)
In addition, the communication frequency per predetermined time is preset as a communication frequency comparison value as an extension time table, and an extension time is prepared for each communication frequency comparison value. That is, the communication frequency is divided step by step, a plurality of extension times are recorded for each divided range, the extension time α2 corresponding to the measured communication frequency is selected, and the time t3 is changed.

  In the extension time table shown in FIG. 19, the communication frequency comparison value a3 is provided as an intermediate value between a1 and a2, and the extension time “A” is selected if the communication frequency is in the range of “a1 to a3” indicated by the communication frequency comparison value. And set to α2. Similarly, if the communication frequency is in the range of “a3 to a2” indicated by the communication frequency comparison value, the extension time “B” is selected.

Note that the communication frequency may be calculated by measuring the number of times of communication per certain time, but is not limited thereto.
In addition, as described in the above embodiment, the wireless terminals 111a and 111b actually continue wireless communication while shifting to the reception states R11 and R12 and the transmission states T11 and T12.

As described above, power consumption in a specific time zone can be reduced.
(Example 8)
FIG. 20 shows a part of the wireless communication network shown in FIG. In the eighth embodiment, unlike the seventh embodiment, the time detection unit 1310 that detects the time and determines whether it is in the set time zone and instructs the intermittent operation control unit 136a to change the sleep period TS includes one time detection unit 1310. A wireless terminal provided only in the wireless terminal and provided with the time detection unit 1310 is defined as a time management terminal. In FIG. 20, the wireless terminal A is a time management terminal. If not all the wireless terminals of the wireless communication network are time management terminals, a plurality of time management terminals may be provided in the wireless communication network.

  Next, as shown in FIG. 22B, the time management terminal generates intermittent interval change notification information for changing t3 or the extended time α2 by the time detection unit 1310. In addition, in order to transmit intermittent interval change notification information to each wireless terminal, a function of transmitting in addition to the transmission signal is provided.

  Further, as shown in FIG. 22C, the wireless terminal other than the time management terminal receives the intermittent interval change notification information, controls the intermittent operation control unit 136, adds it to the transmission signal, and adds t3 or the extended time α2. There is a function to change. In addition, in order to transmit intermittent interval change notification information to each wireless terminal, a function of transmitting in addition to the transmission signal is provided.

  In FIG. 20, the intermittent interval change notification information is transmitted from the wireless terminal A to the wireless terminals B, C, and D based on the configuration information, and then the intermittent interval change notification information is transmitted from the wireless terminal C to the wireless terminals E and F. .

(Description of operation)
The time chart shown in FIG. 21 operates normally until the set time is reached. The wireless terminal 111a and the wireless terminal 111b are the wireless terminals A and B shown in FIG. 20, and have the configuration shown in FIG.

When the set time has passed, a transmission event P13 occurs. The transmission event J13 is a transmission event that occurs when the set time zone is reached, and occurs at the start time and end time of the set time zone.
After the transmission event P13, the wireless terminal 111a shifts to the reception state R12 and waits for reception of the ID notification signal P11 from the wireless terminal 111b. When receiving the ID notification signal P11, the state shifts to the transmission state T12 and the transmission signal P16 is transmitted.

The transmission signal P16 is a signal obtained by adding the intermittent interval change notification information to the normal transmission signal P11 or the like.
When the wireless terminal 111b receives the transmission signal P16, the ID notification signal determination unit 138b determines that the signal is a transmission signal from the target wireless terminal. If the signal is transmitted from the target wireless terminal, the intermittent operation control is performed. The unit 136b is instructed to change from t1 to t3.

That is, in the eighth embodiment, a function for controlling the intermittent operation control unit 136b is provided.
Further, immediately after the set time, the wireless terminal 111a changes the intermittent interval of the intermittent operation control unit 136a from t1 to t3, and shifts to the operating state at the interval of t3.

Note that although two wireless terminals are described in the timing chart, communication control can be performed in the same manner even when there are a plurality of wireless terminals.
As described above, power consumption in a specific time zone can be reduced.

  Note that the control processing performed by the wireless terminals shown in the first to eighth embodiments can be realized by causing a computer to execute a program in which an instruction for performing the control processing is described.

If this program is stored in a storage medium such as a CD-ROM, control processing can be performed by installing the program in a computer (programmable processing device such as CPU, FPGA, CPLD) installed in the wireless terminal. Can be realized. Further, this program may be downloaded to a computer mounted on the wireless terminal via a communication network.
Example 9
(Method of updating the intermittent period based on the power consumption of the terminal during past communication)
When the intermittent cycle is short, the current consumption (or power consumption) during the intermittent operation of the wireless terminal increases, and when the intermittent cycle is long, the current consumption (or power consumption) during the intermittent operation of the terminal decreases.

  In addition, when the intermittent period is short, the wireless terminal on the data transmission side reduces the current consumption (or power consumption) during the intermittent operation of the wireless terminal itself, and when the intermittent period is long, the current consumption during the intermittent operation (or Power consumption).

In such a case, a method for reducing the power consumption of the entire system by adaptively updating the intermittent period based on the power consumption of the wireless terminal during past communication will be described.
FIG. 23 shows a configuration in which an intermittent period determination unit 239 (239a, 239b) is added to the configuration of the wireless terminal shown in FIGS.

  The reception terminal 211a may use a control unit 212a (an information processing device such as a CPU (having a memory)), a wireless transmission unit 213a, a wireless reception unit 214a, a transmission / reception switching unit 215a, an antenna 216a, a battery 217a, and an interface 218a. , A switch 219a, a switch 220a, and an intermittent period determination unit 239a, and the receiving terminal 211a has configuration information in a memory.

  The transmission terminal 211b may use a control unit 212b (an information processing device such as a CPU (having a memory)), a wireless transmission unit 213b, a wireless reception unit 214b, a transmission / reception switching unit 215b, an antenna 216b, a battery 217b, and an interface 218b. , Switch 219b, switch 220b, and intermittent period determination unit 239b, and the transmission terminal 211b has configuration information in the memory.

  The wireless transmission units 213a and 213b have the functions of the wireless transmission units 13a and 13b shown in FIG. 3 and the wireless transmission units 113a and 113b shown in FIGS. The wireless receivers 214a and 214b have the functions of the wireless receivers 14a and 14b shown in FIG. 3 and the wireless receivers 114a and 114b shown in FIGS. The transmission / reception switching units 215a and 215b have the functions of the transmission / reception switching units 15a and 15b shown in FIG. 3 and the transmission / reception switching units 115a and 115b shown in FIGS. The antennas 216a and 216b have the functions of the antennas 16a and 16b shown in FIG. 3 and the antennas 116a and 116b shown in FIGS. The batteries 217a and 217b have the functions of the batteries 17a and 17b shown in FIG. 3 and the batteries 117a and 117b shown in FIGS. The interfaces 218a and 218b have the functions of the interfaces 18a and 18b shown in FIG. 3 and the interfaces 118a and 118b shown in FIGS. The switches 219a and 219b have the functions of the switches 19a and 19b shown in FIG. 3 and the switches 119a and 119b shown in FIGS. The switches 220a and 220b have the functions of the switches 20a and 20b shown in FIG. 3 and the switches 120a and 120b shown in FIGS.

  The transmission state control units 232a and 232b are a first transmission state control unit 32a and a second transmission state control unit 32b shown in FIG. 3, and a first transmission state control unit 132a and a second transmission state control unit 133a shown in FIGS. The functions of the first transmission state control unit 132b and the second transmission state control unit 133b are provided.

  The reception state control units 233a and 233b are a first reception state control unit 33a and a second reception state control unit 33b shown in FIG. 3, and a first reception state control unit 134a and a second reception state control unit 135a shown in FIGS. The first reception state control unit 134b and the second reception state control unit 135b are provided.

The intermittent operation control units 234a and 234b have the functions of the intermittent operation control units 34a and 34b shown in FIG. 3 and the intermittent operation control units 136a and 136b shown in FIGS.
The data transmission control units 235a and 235b have the functions of the data transmission control units 35a and 35b shown in FIG. 3 and the data transmission control units 137a and 137b shown in FIGS.

The ID notification signal determination units 236a and 236b have the functions of the ID notification signal determination units 36a and 36b shown in FIG. 3 and the ID notification signal determination units 138a and 138b shown in FIGS.
Then, after the transmission state in which the ID notification signal for identifying the wireless terminal 211 is transmitted, the control units 212a and 212b send data to the wireless terminal 211 that has transmitted the ID notification signal from the other wireless terminal 211 that has received the ID notification signal. Shift to the reception state of the transmission signal to be transmitted. After the reception state, the process of shifting the wireless terminal 211 to the sleep period is performed intermittently.

  A transmission event generated when communication between wireless terminals becomes necessary is detected, and if it is a sleep period, an ID notification signal transmitted from another wireless terminal is received to shift to a reception waiting state. When the received ID notification signal is recognized as a wireless terminal detected when the transmission event occurs, the state is shifted to a transmission state in which a transmission signal is transmitted.

  The intermittent cycle determination unit 239 (239a, 239b) analyzes the transmission / reception state of the wireless terminal 211 for a preset period, and generates intermittent cycle change information that is an instruction to extend or shorten the sleep period based on the analysis result. Notify the control unit. In addition, it is connected to the power line of the battery 217 (217a, 217b), calculates the power consumption of the battery 217 in the past preset period, and compares the calculated power consumption with the condition recorded in the memory in advance. Based on the comparison result, the intermittent operation control unit 234 (234a, 234b) is controlled to update the intermittent period.

A control part will determine whether it is extended or shortened if the said intermittent period change information is acquired, and performs control which changes the said sleep period.
FIG. 24 is a diagram illustrating a configuration of the intermittent period determination unit 239. The intermittent cycle determination unit 239 illustrated in FIG. 24 generates first operation information and second operation information, and issues an instruction to change the intermittent cycle based on the first operation information and the second operation information. It transmits to the control part 234 (234a, 234b).

  The power is measured from the start of transmission of the ID notification signal to the end of the reception state of the transmission signal for transmitting data from the other wireless terminal 211 that has received the ID notification signal to the wireless terminal 211 that has transmitted the ID notification signal. Then, the intermittent operation power obtained by adding the measurement results is calculated.

  Further, in order to receive the ID notification signal, the power from the start to the end of the reception waiting state is measured, and the cumulative power of the ID reception waiting power obtained by adding the measurement results for a preset period is calculated. The calculation result based on the cumulative power of the intermittent operation power and the ID reception waiting power is compared with the condition setting value for changing the preset intermittent period, and the intermittent period change information is set based on the comparison result. The intermittent period change information that is an instruction to extend or shorten the sleep period by the intermittent period change amount for changing the intermittent period corresponding to extension or shortening is generated.

The intermittent cycle determination unit 239 illustrated in FIG. 24 includes a power calculation unit 81 and a determination unit 82.
The power calculation unit 81 records a set period setting value (TSET) in order to measure intermittent operation power during a preset period. In addition, the power calculation unit 81 measures the power consumption consumed in the transmission state T11 (ID transmission period) and the reception state R11 (data reception period) for a preset period (TSET). Then, the power calculation unit 81 generates first operation information having the measurement result, and transfers the first operation information to the determination unit 82. Further, the power calculation unit 81 measures the power consumption consumed in the reception state R12 (ID reception waiting time) for a preset period (TSET). Then, the power calculation unit 81 generates second operation information having the measurement result, and transfers the second operation information to the determination unit 82.

Here, the power consumption (WALL) of the preset period (TSET) possessed by the first operation information can be expressed by equation (6). That is, the power consumption (WALL) is close to the result obtained by adding the power consumption of the ID transmission power (WT11) and the short reception power (WR11) and adding the number of operations (m) within a preset period to the addition result. Value.

WALL = m × (WT11 + WR11) (6)

Further, the power consumption (WALL2) of the preset period (TSET) possessed by the second operation information can be expressed by equation (7). That is, the power consumption (WALL2) is a value close to the result of adding the power consumption of the ID reception waiting time (TRW).

WALL2 = ID reception waiting time 1 (TRW) × power
+ ID reception waiting time 2 (TRW) x power
・
・
・
+ ID reception waiting time N (TRW) × power (7)

The determination unit 82 acquires the first operation information and the second operation information, and determines whether the conditions shown in the equations (8) to (10) are met.

First condition:
WALL1-WALL2> first condition set value (8)
Second condition:
WALL2-WALL1> second condition set value (9)
Third condition:
WALL2> third condition set value (10)

The first condition set value is a value set in the memory in advance. When determining whether the first condition is set, the first condition set value is compared with a value obtained by subtracting the cumulative power of the ID reception waiting power from the intermittent operation power. This is a set value for changing the intermittent period based on the comparison result.

  The second condition setting value is a value set in the memory in advance. When determining whether the second condition is set, the second condition setting value is compared with a value obtained by subtracting the intermittent operation power from the cumulative power of the ID reception waiting power. This is a set value for changing the intermittent period based on the comparison result.

  The third condition set value is a value set in the memory in advance, and when determining whether the third condition is satisfied, the third condition set value is compared with the cumulative power value of the ID reception waiting power, and based on the comparison result, the intermittent period This is a setting value for changing.

  If the first condition is met, intermittent period change information is transmitted to the intermittent operation control unit 234 (234a, 234b) in order to extend the intermittent period. If the second condition is met, intermittent cycle change information is transmitted to the intermittent operation control unit 234 (234a, 234b) in order to shorten the intermittent cycle. If the third condition is met, intermittent period change information is transmitted to the intermittent operation control unit 234 (234a, 234b) in order to extend the intermittent period. Here, the set values of the first to third conditions are recorded in the memory in advance. The ID reception waiting time (TRW) is changed according to the intermittent period.

FIG. 25 is a flowchart showing the power calculation operation of the power consumption WALL1 included in the first operation information.
In step S91, the power calculation unit 81 obtains an ID transmission start notification. For example, the ID transmission start notification is transmitted from the data transmission control unit 235 (235a, 235b).

In step S92, the power calculation unit 81 measures and records the power consumption in the transmission state T11 (ID transmission period).
In step S93, the power calculation unit 81 subsequently measures and records the power consumption in the reception state R11 (data reception period).

In step S94, the power calculation unit 81 acquires a short reception end notification. For example, a short reception end notification is transmitted from the data transmission control unit 235 (235a, 235b).
In step S95, in order to acquire WALL1 shown in Expression 1, the calculation of Expression (11) is performed.

WALL1 = WALL1 + (WT11 + WR11) (11)

In step S96, it is determined whether it is a preset period set value. For example, is a value set as a period for measuring the first operation information, and is a value representing a measurement period such as “1 week”, “1 month”, “3 months”, “half year”, and “1 year”. When the power calculation unit 81 shifts to a mode in which the period set value is set and adaptively changes the intermittent period, the time measurement is also started, and when the measured time exceeds the period indicated by the period set value, the process proceeds to step S97. If it is within the period, the process proceeds to step S91 to wait for notification of the start of the next ID transmission.

In step S97, the power consumption WALL1 calculated within the period is transmitted to the determination unit 82 as the first operation information.
In step S98, the power consumption WALL1 is cleared in order to perform calculation for the next period.

FIG. 26 is a flowchart showing the power calculation operation of the power consumption WALL2 included in the second operation information.
In step S101, the power calculation unit 81 acquires an ID reception waiting start notification. For example, the ID reception waiting start notification is transmitted from the data transmission control unit 235 (235a, 235b).

In step S102, the power calculation unit 81 measures and records the ID reception waiting time TRW.
In step S103, the power calculation unit 81 acquires an ID reception waiting end notification. For example, the ID reception waiting end notification is transmitted from the data transmission control unit 235 (235a, 235b).

In step S104, the calculation of Expression 6 is performed to obtain WALL2 shown in Expression (12).

WALL2 = WALL2 + TRW (12)

In step S105, it is determined whether it is a preset period set value. When the time measured exceeds the period indicated by the period set value, the process proceeds to step S106. If it is within the period, the process proceeds to step S101 to wait for notification of the next ID reception wait start notification.

In step S106, the power consumption WALL2 calculated within the period is transmitted to the determination unit 82 as second operation information.
In step S107, the power consumption WALL2 is cleared in order to perform calculation for the next period.

  FIG. 27 is an operation for determining whether to change the intermittent period from the power consumption WALL1 (first operation information) and WALL2 (second operation information) and determining an intermittent period change amount for changing the intermittent period. FIG.

In step S111, the determination unit 82 acquires the first operation information and the second operation information.
In step S112, the determination part 82 determines whether it is the 1st-3rd conditions based on the data of WALL1 and WALL2. If it is the first condition or the third condition, the process proceeds to step S113 in order to extend the intermittent period. If it is the second condition, the process proceeds to step S115 to shorten the intermittent period. If none of the first condition, the second condition, and the third condition is met, the process proceeds to step S114.

In step S113, the intermittent cycle change amount is determined based on the table shown in FIG. For example, if the period setting value is one week and the first condition or the third condition, t1 is selected. Here, the amount of change in the intermittent period is adjusted by the measurement time (period set value). For example, if the period set value is 1 week and 3 months, the relationship between the intermittent period change amount (dT1w) for the period set value 1 week and the intermittent period change amount (dT3M) for the period set value 3 months is expressed by equation (13). It is desirable to show. Further, an instruction to extend the intermittent period is notified to the intermittent operation control unit 234 (234a, 234b) by the intermittent period change information.

dT1w <dT3M (13)

In step S114, an instruction not to change the intermittent cycle is notified to the intermittent operation control unit 234 (234a, 234b) by the intermittent cycle change information.

In step S115, the intermittent cycle change amount is determined based on the table shown in FIG. For example, if the period setting value is one week and the second condition is selected, -t1 is selected.
The operation example shown in FIG. 28 is a time chart showing the intermittent period of the wireless terminals A to D shown in FIG. FIG. 28 shows a case where it is determined that the wireless terminal B (transmission destination candidate wireless device B) is in the first condition or the third condition, and its own intermittent period is extended. In the wireless terminal B, the intermittent operation control unit 234 extends the intermittent cycle based on the intermittent cycle change information and changes the TS from TS to TS + dT. The ID reception waiting time (TRW) is changed based on the extended intermittent period change amount. That is, if the intermittent period is extended, it is desirable to extend the ID reception waiting time (TRW). In FIG. 28, the ID reception waiting time (TRW) of the wireless terminal A (data transmitting wireless device A) is extended.

  The operation example shown in FIG. 29 is a time chart showing the intermittent period of the wireless terminals A to D shown in FIG. FIG. 29 shows a case where it is determined that the wireless terminal B (transmission destination candidate wireless device B) is in the second condition and its intermittent period is shortened. In the wireless terminal B, the intermittent operation control unit 234 shortens the intermittent cycle based on the intermittent cycle change information and changes the TS from TS to TS-dT. The ID reception waiting time (TRW) is changed based on the shortened intermittent period change amount. That is, if the intermittent period is shortened, it is desirable to shorten the ID reception waiting time (TRW). In FIG. 28, the ID reception waiting time (TRW) of the wireless terminal A (data transmitting wireless device A) is shortened.

According to the ninth embodiment, it is possible to adaptively update the intermittent period based on the power consumption of each terminal at the time of past communication to reduce the power consumption of the entire system.
(Example 10)
A terminal with a large amount of data transmission consumes a larger amount of power during the standby power than a periodical power, and conversely, a terminal with a small amount of data transmission consumes a larger amount of power during the intermittent period power than the power of reception. In addition, terminals that receive a lot of data can reduce the power consumption of other terminals by shortening the intermittent period, and conversely, if the intermittent period is lengthened, the power consumption of other terminals increases.

  Therefore, a method of reducing the power consumption of the entire system by adaptively updating the intermittent period based on the number of data transmissions and the number of data receptions during communication between the past wireless terminals 211 (211a and 211b) will be described.

In the tenth embodiment, the function of the intermittent period determination unit 239 (239a, 239b) described in the first embodiment is changed to a function described later.
FIG. 30 is a diagram illustrating a configuration of the intermittent period determination unit 239 illustrated in the second embodiment. The intermittent cycle determination unit 239 illustrated in FIG. 30 generates the third operation information and the fourth operation information, and issues an instruction to change the intermittent cycle based on the third operation information and the fourth operation information. It transmits to the control part 234 (234a, 234b). FIG. 30 is a diagram illustrating a configuration of the intermittent period determination unit 239 according to the tenth embodiment. The intermittent cycle determination unit 239 illustrated in FIG. 30 includes a data transmission counter unit 141, a data reception counter unit 142, and a determination unit 143.

  The intermittent period determination unit 239 transmits the transmission signal to transmit data to the wireless terminal 211 that has transmitted the ID notification signal from the other wireless terminal 211 that has received the ID notification signal from the start of transmission of the ID notification signal for a preset period. Obtain the number of data transmissions counted.

  Data reception that counts the number of times of reception of a transmission signal for transmitting data from another wireless terminal 211 that has received the ID notification signal from the start of transmission of the ID notification signal to the wireless terminal 211 that has transmitted the ID notification signal for a preset period Find the number of times. The result calculated based on the number of data transmissions and the number of data receptions is compared with a condition set value for changing a preset intermittent period. Based on the comparison result, intermittent cycle change information is generated which is an instruction to extend or shorten the sleep period by the intermittent cycle change amount for changing the intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information.

  The data transmission counter unit 141 records a set period setting value (TSET) in order to measure intermittent operating power during a preset period. Further, the data transmission counter unit 141 counts every time a preset period (TSET) transmission state T12 (data transmission period of the transmission signal P12) is detected. Then, the data transmission counter unit 141 generates third operation information having the count value (COUNT_DS), and transfers the third operation information to the determination unit 143.

  The data reception counter unit 142 counts the number of times the transmission signal P12 is received for a preset period (TSET). Then, the data reception counter unit 142 generates fourth operation information having the count value (COUNT_DR), and transfers the fourth operation information to the determination unit 143.

The determination unit 143 acquires the third operation information and the fourth operation information, and determines whether the conditions shown in the equations (14) to (17) are met.

Fourth condition:
COUNT_DS-COUNT_DR> Fourth condition set value (14)
Fifth condition:
COUNT_DR-COUNT_DS> fifth condition set value (15)
Sixth condition:
COUNT_DS> sixth condition set value (16)
Seventh condition:
COUNT_DR> seventh condition set value (17)

The fourth condition set value is a value set in advance in the memory. When determining whether the fourth condition is satisfied, the fourth condition set value is compared with a value obtained by subtracting the data reception count from the data transmission count, and based on the comparison result. Set value for changing the intermittent period.

  The fifth condition set value is a value set in the memory in advance. When determining whether the fifth condition is satisfied, the fifth condition set value is compared with a value obtained by subtracting the data transmission count from the data reception count and based on the comparison result. Set value for changing the intermittent period.

  The sixth condition set value is a value set in the memory in advance. When determining whether the sixth condition is set, the number of data transmissions is compared with the sixth condition set value, and based on the comparison result. This is a set value for changing the intermittent period.

  The seventh condition setting value is a value set in the memory in advance. When determining whether the seventh condition is satisfied, the seventh condition setting value is compared with the seventh condition setting value based on the comparison result. This is a set value for changing the intermittent period.

  If the fourth condition or the sixth condition is met, intermittent period change information is transmitted to the intermittent operation control unit 234 (234a, 234b) in order to extend the intermittent period. If the fifth condition or the seventh condition is met, intermittent period change information is transmitted to the intermittent operation control unit 234 (234a, 234b) in order to shorten the intermittent period. Here, the set values of the fourth to seventh conditions are recorded in the memory in advance. The ID reception waiting time (TRW) is changed according to the intermittent period.

FIG. 31 is a flowchart showing an operation of acquiring a count value (COUNT_DS) included in the third operation information.
In step S151, the data transmission counter unit 141 acquires a data transmission start notification. For example, the data transmission start notification is transmitted from the data transmission control unit 235 (235a, 235b).

In step S152, the data transmission counter unit 141 counts every time a preset period (TSET) transmission state T12 (data transmission period of the transmission signal P12) is detected. For example, it may be counted as in equation (18), and is not limited.

COUNT_DS = COUNT_DS + 1 (18)

In step S153, it is determined whether or not the data transmission counter unit 141 has a preset period setting value. For example, is a value set as a period for measuring the first operation information, and is a value representing a measurement period such as “1 week”, “1 month”, “3 months”, “half year”, and “1 year”. When the data transmission counter unit 141 shifts to the mode in which the period setting value is set and adaptively changes the intermittent period, the time measurement is also started, and when the time measured exceeds the period indicated by the period setting value, the process proceeds to step S154. . If it is within the period, the process proceeds to step S151 to wait for notification of the next data transmission start notification.

In step S154, the count value (COUNT_DS) counted within the period is transmitted to the determination unit 143 as third operation information.
In step S155, the count value (COUNT_DS) is cleared in order to perform the calculation for the next period.

FIG. 32 is a diagram illustrating the power calculation operation of the count value (COUNT_DR) included in the fourth operation information.
In step S161, the data reception counter unit 142 acquires a data reception start notification. For example, the data reception start notification is transmitted from the data transmission control unit 235 (235a, 235b).

In step S162, the data reception counter unit 142 counts every time it detects that it has received preset period (TSET) data (transmission signal P12). For example, it may be counted as in the equation (19), and is not limited.

COUNT_DR = COUNT_DR + 1 (19)

In step S163, it is determined whether it is a preset period set value. When the measured time is longer than the period indicated by the period set value, the process proceeds to step S164. If it is within the period, the process proceeds to step S161 to wait for notification of the next data reception start notification.

In step S164, the count value (COUNT_DR) counted within the period is transmitted to the determination unit 143 as third operation information.
In step S165, the count value (COUNT_DR) is cleared to perform calculation for the next period.

  FIG. 33 shows an operation of determining whether or not to change the intermittent period from COUNT_DS (first operation information) and COUNT_DR (second operation information) and determining an intermittent period change amount for changing the intermittent period. FIG.

In step S171, the determination unit 143 acquires third operation information and fourth operation information.
In step S172, the determination unit 143 determines whether the fourth to seventh conditions are satisfied based on the data of COUNT_DS and COUNT_DR. If it is the fourth condition or the sixth condition, the process proceeds to step S173 in order to extend the intermittent period. If it is the fifth condition or the seventh condition, the process proceeds to step S175 in order to shorten the intermittent period. If the fourth condition, the fifth condition, the sixth condition, or the seventh condition does not match, the process proceeds to step S174.

In step S173, the intermittent period change amount is determined based on the table shown in FIG. For example, if the period setting value is one week and the fourth condition or the sixth condition, t1 is selected. Here, the amount of change in the intermittent period is adjusted by the measurement time (period set value). For example, if the period set value is 1 week and 3 months, the relationship between the intermittent period change amount (dT1w) for the period set value 1 week and the intermittent period change amount (dT3M) for the period set value 3 months is expressed by equation (20). It is desirable to show. Further, an instruction to extend the intermittent period is notified to the intermittent operation control unit 234 (234a, 234b) by the intermittent period change information.

dT1w <dT3M (20)

In step S174, an instruction not to change the intermittent period is notified to the intermittent operation control unit 234 (234a, 234b) by the intermittent period change information.

In step S175, the intermittent cycle change amount is determined based on the table shown in FIG. For example, if the period set value is one week and the fifth condition or the seventh condition, -t1 is selected.
Here, FIG. 34 shows a data format.

As the period setting value (TSET), a count value or a measurement start time and a measurement end time are set in the “period”.
In the first operation information, at least the power (WALL_T11) of intermittent operation during a preset period (TSET) and operation information identification data are set. Other data may be set.

  In the second operation information, at least a cumulative power (WALL_R11) of ID reception waiting power for data transmission in a preset period (TSET) and operation information identification data are set. Other data may be set.

  In the third operation information, at least the number of data transmissions (COUNT_DS) in a preset period (TSET) and operation information identification data are set. Other data may be set.

  In the fourth operation information, at least a data reception count (COUNT_DR) in a preset period (TSET) and operation information identification data are set. Other data may be set.

In the intermittent cycle change information, at least extension or shortening is set, and a change amount for changing the intermittent cycle is set. Other data may be set.
According to the tenth embodiment, it is possible to adaptively update the intermittent period based on the power consumption of each terminal at the time of past communication to reduce the power consumption of the entire system.
(Example 11)
A method for reducing the power consumption of the entire system by prioritizing the first to seventh conditions described in the eleventh embodiment and adaptively updating the intermittent period more accurately will be described.

In the eleventh embodiment, the function of the intermittent cycle determination unit 239 (239a, 239b) described in the ninth embodiment or the tenth embodiment is changed to a function described later.
FIG. 35 is a diagram illustrating a configuration of the intermittent period determination unit 239 illustrated in the eleventh embodiment. The intermittent cycle determination unit 239 illustrated in FIG. 35 generates first operation information to fourth operation information, and issues an instruction to change the intermittent cycle based on the first operation information to fourth operation information. It transmits to the control part 234 (234a, 234b).

The intermittent cycle determination unit 239 illustrated in FIG. 35 includes a power calculation unit 181, a data transmission counter unit 141, a data reception counter unit 142, and a determination unit 191.
As described above, the power calculation unit 181, the data transmission counter unit 141, and the data reception counter unit 142 generate first operation information to fourth operation information.

  The determination unit 191 obtains an instruction to acquire the first operation information to the fourth operation information and change the intermittent period based on the first operation information to the fourth operation information, and the intermittent operation control unit 234 (234a, 234a, 234b).

FIG. 36 shows an example of determining the extension or shortening of the intermittent period according to the priority order.
In step S201, the determination unit 191 acquires any one of the first operation information to the fourth operation information. From the power calculation unit 181, first operation information or second operation information is acquired. The third operation information is acquired from the data transmission counter unit 141. Fourth operation information is acquired from the data reception counter unit 142.

  In step S202, it is determined whether the acquired operation information is the third condition. If it matches the third condition, the process proceeds to step S207. If they do not match, the process proceeds to step S203.

  In step S203, it is determined whether the acquired operation information is the sixth condition. If the sixth condition is met, the process proceeds to step S207. If they do not match, the process proceeds to step S204.

  In step S204, it is determined whether the acquired operation information is the seventh condition. If the seventh condition is met, the process proceeds to step S209. If they do not match, the process proceeds to step S205.

  In step S205, it is determined whether the acquired operation information is the first condition or the second condition. If the first condition is met, the process proceeds to step S207. If it matches the second condition, the process proceeds to step S209. If not, the process proceeds to step S206.

  In step S206, it is determined whether the acquired operation information is the fourth condition or the fifth condition. If the first condition is met, the process proceeds to step S207. If it matches the second condition, the process proceeds to step S209. If not, the process proceeds to step S206.

  In step S207, in order to extend the intermittent period, the intermittent period change amount is determined based on the tables shown in FIGS. In order to extend the intermittent period, the intermittent period change information is transmitted to the intermittent operation control unit 234 (234a, 234b).

In step S208, an instruction not to change the intermittent period is notified to the intermittent operation control unit 234 (234a, 234b) by the intermittent period change information.
In step S209, in order to shorten the intermittent period, the intermittent period change amount is determined based on the tables shown in FIGS. In order to shorten the intermittent period, the intermittent period change information is transmitted to the intermittent operation control unit 234 (234a, 234b).

The ID reception waiting time (TRW) is also changed in accordance with the intermittent period.
Note that the control processing performed by the wireless terminals shown in the ninth to eleventh embodiments can be realized by causing a computer to execute a program in which an instruction for performing the control processing is described.

  If this program is stored in a storage medium such as a CD-ROM, control processing can be performed by installing the program in a computer (programmable processing device such as CPU, FPGA, CPLD) installed in the wireless terminal. Can be realized. Further, this program may be downloaded to a computer mounted on the wireless terminal via a communication network.

  The present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the gist of the present invention.

3 is a diagram illustrating a data transfer path from a wireless terminal A to a wireless terminal J. FIG. It is a figure which shows the structure information which each radio | wireless terminal A, B, E, G manages, respectively. It is a block diagram which shows schematic structure of the communication apparatus which concerns on Example 1 of this invention. It is a figure which shows the flowchart which shows the intermittent transmission / reception operation | movement of the communication apparatus of FIG. (Receiving terminal 11a) It is a figure which shows the flowchart which shows the intermittent transmission / reception operation | movement of the communication apparatus of FIG. (Transmission terminal 11b) It is a timing diagram which shows the intermittent transmission / reception operation | movement of the receiving terminal 11a. It is a timing diagram which shows the intermittent transmission / reception operation | movement of the transmission terminal 11b. It is a timing diagram which shows an example of the intermittent communication method of the communication apparatus which concerns on Example 1 of this invention. It is a timing diagram of the intermittent communication of the communication apparatus which concerns on Example 2 of this invention. It is a timing diagram of the intermittent communication of the communication apparatus which concerns on Example 3 of this invention. It is a block diagram which shows the structure of the radio | wireless terminal which comprises the radio | wireless communication network which concerns on Example 4 of this invention. It is a timing diagram of the intermittent communication of the communication apparatus which concerns on Example 4 of this invention. It is a timing diagram of the intermittent communication of the radio | wireless communication network which concerns on Example 5 of this invention. It is a state transition diagram which shows the operating method of the communication apparatus which concerns on this invention. It is a block diagram which shows the structure of the radio | wireless terminal which comprises the radio | wireless communication network which concerns on Example 6 of this invention. It is a figure which shows the flowchart which shows the intermittent transmission / reception operation | movement of the communication apparatus of Example 6 of this invention. It is a figure which shows the flowchart which shows the intermittent transmission / reception operation | movement of the communication apparatus of Example 6 of this invention. It is a timing diagram which shows the intermittent transmission / reception operation | movement of the communication apparatus of Example 6 of this invention. It is a figure which shows an extension time table. It is a figure which shows the communication frequency of the radio | wireless communication network which concerns on Example 7 of this invention. It is a figure which shows the flowchart which shows the intermittent transmission / reception operation | movement of the communication apparatus of Example 7 of this invention. It is a timing diagram of intermittent communication of the communication apparatus according to the seventh embodiment of the present invention. It is a figure which shows an extension time table. It is a figure which shows the structure of the radio | wireless communication network which concerns on Example 8 of this invention. It is a timing diagram of intermittent communication of the communication apparatus according to the eighth embodiment of the present invention. FIG. 10 is a diagram illustrating a configuration of a control unit according to Examples 7 and 8. It is a block diagram which shows schematic structure of the communication apparatus which concerns on Example 9 of this invention. It is a figure which shows the structure of an intermittent period determination part. It is a flowchart which shows the method of calculating intermittent operation electric power. It is a flowchart which shows the method of calculating the cumulative power of ID reception waiting power. It is a flowchart which selects extension or shortening of an intermittent period using the 1st-3rd conditions. It is a timing diagram of intermittent period extension of the intermittent communication of the communication apparatus according to the ninth embodiment of the present invention. It is a timing diagram of the intermittent period shortening of the intermittent communication of the communication apparatus which concerns on Example 9 of this invention. It is a figure which shows the structure of the intermittent period determination part which concerns on Example 10 of this invention. It is a flowchart which shows the method of calculating the data transmission frequency. It is a flowchart which shows the method of calculating the data reception frequency. It is a flowchart which selects extension or shortening of an intermittent period using the 4th-7th conditions. It is a figure which shows a data structure. It is a figure which shows the structure of the intermittent period determination part which concerns on Example 11 of this invention. It is a flowchart which gives priority to the 1st-7th conditions, and selects extension or shortening of an intermittent cycle.

Explanation of symbols

11a, 111a, 211a receiving terminal (wireless terminal),
11b, 111b, 211b transmitting terminal (wireless terminal),
11c, 111c receiving terminal (wireless terminal),
12a, 12b, 112a, 112b, 212a, 212b control unit,
13a, 13b, 113a, 113b, 213a, 213b wireless transmission unit,
14a, 14b, 114a, 114b, 214a, 214b wireless receiver,
15a, 15b, 115a, 115b, 215a, 215b transmission / reception switching unit,
16a, 16b, 116a, 116b, 216a, 216b antenna,
17a, 17b, 117a, 117b, 217a, 217b batteries,
18a, 18b, 118a, 118b, 218a, 218b interface,
19a, 19b, 119a, 119b, 219a, 219b switches,
20a, 20b, 120a, 120b, 220a, 220b switch,
31a, 31b, 131a, 131b, 231a, 231b operation state control unit,
32a, 132a, 132b first transmission state control unit,
32b, 133a, 133b second transmission state control unit,
33a, 134a, 134b first reception state control unit,
33b, 135a, 135b second reception state control unit,
34a, 34b intermittent operation control unit,
35a, 35b data transmission control unit,
36a, 36b ID notification signal determination unit,
232a, 232b transmission state control unit,
233a, 233b reception state control unit,
111a, 111b wireless terminals,
136a, 136b, 234a, 234b intermittent operation control unit,
137a, 137b, 235a, 235b data transmission control unit,
138a, 138b, 236a, 236b ID notification signal determination unit,
139a, 139b power consumption calculation unit,
1310 time detector,
239a, 239b intermittent period determination unit,
81 power calculator,
82, 143, 191 determination unit,
141 data transmission counter section,
142 data reception counter section,

Claims (28)

Wireless communication comprising a plurality of wireless terminals that perform wireless data communication, and communicating with any of the wireless terminals directly or via one or more other wireless terminals with all other wireless terminals using packetized data A network system,
The wireless terminal is
A wireless transmission unit and a wireless reception unit for communicating between the wireless terminals;
After a transmission state in which an ID notification signal for identifying the wireless terminal is transmitted, a reception state of a transmission signal in which the data is transmitted from another wireless terminal that has received the ID notification signal to the wireless terminal that has transmitted the ID notification signal The process of shifting the wireless terminal to a sleep period after the reception state is intermittently performed,
A transmission event generated when communication between the wireless terminals becomes necessary is detected, and in the sleep period, the wireless communication terminal enters a reception waiting state in order to receive the ID notification signal transmitted from another wireless terminal. A control unit that shifts to a transmission state in which the transmission signal is transmitted when the received ID notification signal is recognized as a wireless terminal detected when the transmission event occurs;
An intermittent period determination unit that analyzes a transmission / reception state of the wireless terminal for a preset period, generates intermittent period change information that is an instruction to extend or shorten the sleep period based on the analysis result, and notifies the control unit And comprising
The said control part determines whether it is extended or shortened if the said intermittent period change information is acquired, and performs the control which changes the said sleep period, The wireless communication network system characterized by the above-mentioned. The controller is
The wireless communication network system according to claim 1, wherein the sleep period is extended or shortened based on an intermittent change amount that changes an intermittent period corresponding to an extension or shortening set in the intermittent period change information. The intermittent period determination unit
Measure the power from the start of transmission of the ID notification signal to the end of the reception state of the transmission signal that transmits the data to the wireless terminal that transmitted the ID notification signal from another wireless terminal that has received the ID notification signal, Intermittent operation power obtained by adding the measurement results for the preset period;
The result of calculating the power from the start to the end of the reception waiting state in order to receive the ID notification signal, and the calculation based on the preset period and the cumulative power of the ID reception waiting power obtained by adding the measurement result And the condition setting value for changing the preset intermittent period,
Based on the comparison result, the intermittent cycle change information is generated which is an instruction to extend or shorten the sleep period by an intermittent cycle change amount for changing the intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. The wireless communication network system according to claim 2. The intermittent period determination unit records the first condition to the third condition,
If it is the first condition, when the value obtained by subtracting the cumulative power of the ID reception waiting power from the intermittent operation power is larger than the first condition set value for changing the preset intermittent period, the intermittent period is Extend,
The second condition is to shorten the intermittent period when the value obtained by subtracting the intermittent operation power from the cumulative power of the ID reception waiting power is larger than the second condition set value for changing the preset intermittent period. ,
The third condition is that when the cumulative power of the ID reception waiting power is larger than the third condition set value, the intermittent period is extended.
The wireless communication network system according to claim 3. The intermittent period determination unit
Counting the number of transmissions of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period The number of data transmissions
Number of times of reception of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period Compare the result calculated based on the number of data receptions counted and the condition set value for changing the preset intermittent period,
Based on the comparison result, the intermittent cycle change information is generated which is an instruction to extend or shorten the sleep period by an intermittent cycle change amount for changing the intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. The wireless communication network system according to claim 2. The intermittent period determination unit records the fourth condition to the seventh condition,
The fourth condition is that when the value obtained by subtracting the data reception count from the data transmission count is greater than a fourth condition set value for changing a preset intermittent cycle, the intermittent cycle is extended,
The fifth condition is that when the value obtained by subtracting the data transmission count from the data reception count is larger than the fifth condition set value for changing a preset intermittent cycle, the intermittent cycle is shortened,
The sixth condition is that when the number of data transmissions is larger than the sixth condition set value, the intermittent period is extended,
The seventh condition is to shorten the intermittent period when the number of times of data reception is larger than the seventh condition set value.
The wireless communication network system according to claim 5. The intermittent period determination unit
The intermittent operation power, the cumulative power of the ID reception waiting power, the number of data transmissions and the number of data receptions are acquired, priorities are assigned to the first to seventh conditions, and the intermittent period is changed in order. The wireless communication network system according to claim 4 or 6,   The determination is performed in the order of the third condition, the sixth condition, the seventh condition, the first condition or the second condition, the fourth condition, or the fifth condition. The wireless communication network system according to claim 7. The controller is
The reception waiting state is extended or shortened in order to receive the ID notification signal based on an intermittent cycle change amount for changing an intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. Item 10. The wireless communication network system according to any one of Items 1 to 9. Wireless communication comprising a plurality of wireless terminals that perform wireless data communication, and communicating with any of the wireless terminals directly or via one or more other wireless terminals with all other wireless terminals using packetized data The wireless terminal of the network system
A wireless transmission unit and a wireless reception unit for communicating between the wireless terminals;
After a transmission state in which an ID notification signal for identifying the wireless terminal is transmitted, a reception state of a transmission signal in which the data is transmitted from another wireless terminal that has received the ID notification signal to the wireless terminal that has transmitted the ID notification signal The process of shifting the wireless terminal to a sleep period after the reception state is intermittently performed,
A transmission event generated when communication between the wireless terminals becomes necessary is detected, and in the sleep period, the wireless communication terminal enters a reception waiting state in order to receive the ID notification signal transmitted from another wireless terminal. A control unit that shifts to a transmission state in which the transmission signal is transmitted when the received ID notification signal is recognized as a wireless terminal detected when the transmission event occurs;
An intermittent period determination unit that analyzes a transmission / reception state of the wireless terminal for a preset period, generates intermittent period change information that is an instruction to extend or shorten the sleep period based on the analysis result, and notifies the control unit And comprising
The said control part determines whether it is extended or shortened if the said intermittent period change information is acquired, and performs the control which changes the said sleep period, It is characterized by the above-mentioned. The controller is
The wireless terminal according to claim 10, wherein the sleep period is extended or shortened based on an intermittent change amount that changes an intermittent period corresponding to the extension or shortening set in the intermittent period change information. The intermittent period determination unit
Measure the power from the start of transmission of the ID notification signal to the end of the reception state of the transmission signal that transmits the data to the wireless terminal that transmitted the ID notification signal from another wireless terminal that has received the ID notification signal, Intermittent operation power obtained by adding the measurement results for the preset period;
The result of calculating the power from the start to the end of the reception waiting state in order to receive the ID notification signal, and the calculation based on the preset period and the cumulative power of the ID reception waiting power obtained by adding the measurement result And the condition setting value for changing the preset intermittent period,
Based on the comparison result, the intermittent cycle change information is generated which is an instruction to extend or shorten the sleep period by an intermittent cycle change amount for changing the intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. The wireless terminal according to claim 11. The intermittent period determination unit records the first condition to the third condition,
If it is the first condition, when the value obtained by subtracting the cumulative power of the ID reception waiting power from the intermittent operation power is larger than the first condition set value for changing the preset intermittent period, the intermittent period is Extend,
The second condition is to shorten the intermittent period when the value obtained by subtracting the intermittent operation power from the cumulative power of the ID reception waiting power is larger than the second condition set value for changing the preset intermittent period. ,
The third condition is that when the cumulative power of the ID reception waiting power is larger than the third condition set value, the intermittent period is extended.
The wireless terminal according to claim 12. The intermittent period determination unit
Counting the number of transmissions of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period The number of data transmissions
Number of times of reception of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period Compare the result calculated based on the number of data receptions counted and the condition set value for changing the preset intermittent period,
Based on the comparison result, the intermittent cycle change information is generated which is an instruction to extend or shorten the sleep period by an intermittent cycle change amount for changing the intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. The wireless terminal according to claim 13. The intermittent period determination unit records the fourth condition to the seventh condition,
The fourth condition is that when the value obtained by subtracting the data reception count from the data transmission count is greater than a fourth condition set value for changing a preset intermittent cycle, the intermittent cycle is extended,
The fifth condition is that when the value obtained by subtracting the data transmission count from the data reception count is larger than the fifth condition set value for changing a preset intermittent cycle, the intermittent cycle is shortened,
The sixth condition is that when the number of data transmissions is larger than the sixth condition set value, the intermittent period is extended,
The seventh condition is to shorten the intermittent period when the number of data receptions is greater than the seventh condition set value.
The wireless terminal according to claim 14. The intermittent period determination unit
The intermittent operation power, the cumulative power of the ID reception waiting power, the number of data transmissions and the number of data receptions are acquired, priorities are assigned to the first to seventh conditions, and the intermittent period is changed in order. The wireless terminal according to claim 13 or 15, wherein the wireless terminal is a wireless terminal.   The determination is performed in the order of the third condition, the sixth condition, the seventh condition, the first condition or the second condition, the fourth condition, or the fifth condition. The wireless terminal according to claim 16. The controller is
The reception waiting state is extended or shortened in order to receive the ID notification signal based on an intermittent cycle change amount for changing an intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. Item 19. The wireless terminal according to any one of Items 9 to 18. Wireless communication comprising a plurality of wireless terminals that perform wireless data communication, and communicating with any of the wireless terminals directly or via one or more other wireless terminals with all other wireless terminals using packetized data A wireless communication method for a network system,
Transition to a transmission state for transmitting an ID notification signal for identifying the wireless terminal,
Transition to the reception state of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from the other wireless terminal that has received the ID notification signal,
Intermittently performing a process of shifting the wireless terminal to a sleep period after the reception state;
Detecting a transmission event generated when communication between the wireless terminals becomes necessary;
If it is the sleep period, transition to a reception waiting state in order to receive the ID notification signal transmitted from another wireless terminal,
When the received ID notification signal is recognized as a wireless terminal detected at the time of occurrence of the transmission event, transition to a transmission state for transmitting the transmission signal,
Further, the transmission / reception state of the wireless terminal is analyzed for a preset period, and the sleep period is extended or shortened based on the analysis result.
A wireless communication method. Measure the power from the start of transmission of the ID notification signal to the end of the reception state of the transmission signal that transmits the data to the wireless terminal that transmitted the ID notification signal from another wireless terminal that has received the ID notification signal, Intermittent operation power obtained by adding the measurement results for the preset period;
The result of calculating the power from the start to the end of the reception waiting state in order to receive the ID notification signal, and the calculation based on the preset period and the cumulative power of the ID reception waiting power obtained by adding the measurement result And the condition setting value for changing the preset intermittent period,
The wireless communication method according to claim 19, wherein the sleep period is extended or shortened based on the comparison result. Counting the number of transmissions of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period The number of data transmissions
Number of times of reception of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period Compare the result calculated based on the number of data receptions counted and the condition set value for changing the preset intermittent period,
The wireless communication method according to claim 19, wherein the sleep period is extended or shortened based on the comparison result. Wireless communication comprising a plurality of wireless terminals that perform wireless data communication, and communicating with any of the wireless terminals directly or via one or more other wireless terminals with all other wireless terminals using packetized data A program executed by a computer that controls a wireless terminal of a network system,
A process of shifting to a transmission state in which an ID notification signal for identifying the wireless terminal is transmitted;
A process of transitioning to a reception state of a transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal;
A process of intermittently performing a process of shifting the wireless terminal to a sleep period after the reception state;
A process of detecting a transmission event generated when communication between the wireless terminals becomes necessary;
If it is the sleep period, a process of shifting to a reception waiting state in order to receive the ID notification signal transmitted from another wireless terminal;
When the received ID notification signal is recognized as a wireless terminal detected when the transmission event occurs, a process of shifting to a transmission state for transmitting the transmission signal;
Furthermore, a process for analyzing a transmission / reception state of the wireless terminal for a preset period, and extending or shortening the sleep period based on the analysis result;
For causing a computer that controls the wireless terminal to execute the program. Measure the power from the start of transmission of the ID notification signal to the end of the reception state of the transmission signal that transmits the data to the wireless terminal that transmitted the ID notification signal from another wireless terminal that has received the ID notification signal, Intermittent operation power obtained by adding the measurement results for the preset period;
The result of calculating the power from the start to the end of the reception waiting state in order to receive the ID notification signal, and the calculation based on the preset period and the cumulative power of the ID reception waiting power obtained by adding the measurement result And the condition setting value for changing the preset intermittent period,
23. The program that is executed by a computer that controls the wireless terminal according to claim 22, wherein the sleep period is extended or shortened based on the comparison result. Counting the number of transmissions of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period The number of data transmissions
Number of times of reception of the transmission signal for transmitting the data to the wireless terminal that has transmitted the ID notification signal from another wireless terminal that has received the ID notification signal from the start of transmission of the ID notification signal during the preset period Compare the result calculated based on the number of data receptions counted and the condition set value for changing the preset intermittent period,
23. The program that is executed by a computer that controls the wireless terminal according to claim 22, wherein the sleep period is extended or shortened based on the comparison result. If it is the first condition, when the value obtained by subtracting the cumulative power of the ID reception waiting power from the intermittent operation power is larger than the first condition set value for changing the preset intermittent period, the intermittent period is Extend,
If the second condition is satisfied, the intermittent period is set when the value obtained by subtracting the intermittent operation power from the cumulative power of the ID reception waiting power is larger than the second condition set value for changing the preset intermittent period. Shortened,
If it is the third condition, when the cumulative power of the ID reception waiting power is larger than the third condition set value, the intermittent period is extended,
If it is the fourth condition, when the value obtained by subtracting the data reception number from the data transmission number is larger than the fourth condition setting value for changing the preset intermittent period, the intermittent period is extended,
If it is the fifth condition, when the value obtained by subtracting the data transmission count from the data reception count is larger than the fifth condition set value for changing the preset intermittent cycle, the intermittent cycle is shortened,
If it is the sixth condition, when the number of data transmissions is greater than the sixth condition set value, the intermittent period is extended,
If the seventh condition, the intermittent period is shortened when the data reception count is larger than the seventh condition set value.
25. A program that is executed by a computer that controls a wireless terminal according to claim 23 or 24.   The intermittent operation power, the cumulative power of the ID reception waiting power, the number of data transmissions and the number of data receptions are acquired, priorities are assigned to the first to seventh conditions, and the intermittent period is changed in order. 26. A program that is executed by a computer that controls the wireless terminal according to claim 25.   The determination is performed in the order of the third condition, the sixth condition, the seventh condition, the first condition or the second condition, the fourth condition, or the fifth condition. A program that is executed by a computer that controls the wireless terminal according to claim 26. The controller is
The reception waiting state is extended or shortened in order to receive the ID notification signal based on an intermittent cycle change amount for changing an intermittent cycle corresponding to the extension or shortening set in the intermittent cycle change information. Item 28. A program that is executed by a computer that controls the wireless terminal according to any one of Items 22 to 27.