JP2005354634A - Multihop radio communication method/system/radio-apparatus using intermittent reception wait technology - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multihop radio communication method canceling an intermittent reception wait only for a radio apparatus required for data transfer in the case of data transfer and performing real-time data transfer even if intermittent reception wait technologies are adopted. <P>SOLUTION: In addition to an ordinary radio signal containing IDs of a base station radio apparatus 32 of a transmission source and of a radio apparatus 35 of a transmission destination, an ID read signal (containing an ID of a radio apparatus 33) for canceling only an intermittent reception waiting state of the radio apparatus 33 is added to data to be transmitted from the base station radio apparatus 32 to the radio apparatus 35. If the radio apparatus 33 repeats and receives these data, presence of its own ID in the ID read signal is detected and the intermittent reception waiting state is canceled. Data transfer processing is performed thereafter and the intermittent reception waiting state is recovered. For a radio apparatus 34 connected with the base station radio apparatus 32 by a path, on the other hand, there is not its own ID in the ID read signal so that the intermittent reception waiting state is not canceled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to wireless communication, and particularly to multi-hop wireless communication.

  Wireless communication is convenient because it is not necessary to draw a communication cable as in wired communication, but the problems related to power supply lines and power supply have not been solved. Conventionally, only one-to-one wireless communication has been used. The device had a power line. Therefore, the place where the wireless device can be placed is limited.

  Recently, secondary batteries that can be charged are used in wireless devices such as mobile phones. However, there is a problem of limitation of continuous use time due to power consumption.

  In the ubiquitous era, it becomes extremely important to solve the problem of power supply lines and power consumption of wireless devices. For example, a small wireless device such as RFID (Radio Frequency Identification) or a sensor is attached to an object or placed outdoors, and placed anywhere, and then information on the object, environmental data, etc. are placed. In multi-hop wireless communication in which a plurality of wireless devices are relayed and collected, it is particularly important to solve the problem of the power supply line and power consumption of the wireless device.

  Thus, it is necessary to reduce the power consumption of a wireless device that performs multi-hop wireless communication. In this case, the key is to reduce the power consumption during standby that occupies a long time. In order to reduce the power consumption during the standby, several intermittent reception waiting techniques have been proposed in which the standby state and the sleep state are periodically repeated instead of being always in the standby state.

For example, there is a method of starting up a CPU and a normal wireless transmission / reception unit (for example, Jan M. Rabaey, Josie) after waiting for intermittent reception by an operation of only the intermittent reception unit and receiving an activation signal having a certain pulse width. Ammer, Tufan Karalar, Suetfei Li, Brian Otis, Mike Sheets, Tim Tuan, "12.3 PicoRadios for Wireless Sensor Networs-The Next Challenge in Ultra-Low Power Design", Proceedings of the International Solid-State Circuits Conference, San Francisco , CA, February 3-7, 2002 ( (See Non-Patent Document 1)). In addition, each wireless device has a built-in clock function. Normally, only the clock function is operated, and when a certain time comes, the CPU and the wireless transmission / reception unit of each wireless device are activated by themselves to receive the wireless signal. This is a method for making it possible (see, for example, Japanese Patent Application No. 2003-109493 (Patent Document 1)).
Jan M. Rabaey, Josie Ammer, Tufan Karalar, Suetfei Li, Brian Otis, Mike Sheets, Tim Tuan, "12.3 PicoRadios for Wireless Sensor Networs-The Next Challenge in Ultra-Low Power Design", Proceedings of the International Solid-State Circuits Conference San Francisco, CA, February 3-7, 2002. Japanese Patent Application No. 2003-109493

  However, in the former method, since the activation signal is viewed only by the pulse width, even if it is desired to activate only one wireless device to be communicated, all wireless devices within the range where the activation signal can be received are activated. End up. Moreover, since it looks only at the pulse width, it is easy to start accidentally by noise. Accordingly, an increase in power consumption of the wireless device becomes a problem.

  In the latter method, since wireless communication is not possible if the transmission timing and the reception timing do not match, time synchronization between all wireless devices is required, but in multi-hop wireless communication, synchronization is not possible. Technically difficult. In addition, since communication is not possible unless a certain time is reached, there is a problem that it is not suitable for real-time data transfer.

  SUMMARY OF THE INVENTION An object of the present invention is a multi-hop wireless communication method capable of canceling the intermittent reception wait of only a wireless device necessary for data transfer and performing real-time data transfer even when adopting the intermittent reception wait technique. And to provide a system.

  In order to achieve the above object, the present invention uses a multi-hop data transfer path constructed between a base station radio apparatus controlled by a base station control server and a plurality of distributed radio apparatuses. In a multi-hop wireless communication system in which a base station wireless device performs wireless communication with a predetermined wireless device, the base station wireless device and the wireless device each include route information related to a multi-hop data transfer route that is included as a node. Furthermore, in addition to the normal radio signal including the ID of the base station radio device and the predetermined radio device, the wireless communication data exchanged between the base station radio device and the predetermined radio device is put into a state of waiting for intermittent reception. An ID call signal used to activate a specific wireless device is added.

  Then, the base station wireless device or the predetermined wireless device refers to the route information, and includes the ID of the wireless device immediately below or directly above the multi-hop data transfer route, which is the start point or end point of itself, in the ID call signal. Wireless communication data.

  Upon receiving the wireless communication data, each wireless device analyzes the ID call signal included in the wireless communication data, and releases the intermittent reception waiting state only when the ID call signal includes its own ID. . When the ID call signal does not include its own ID, the intermittent reception waiting state is not canceled.

  When each wireless device releases the intermittent reception waiting state, the wireless device analyzes the normal wireless signal included in the wireless communication data, and if the ID included in the normal wireless signal is not its own ID, the wireless device obtains the ID from itself. In a multi-hop data transfer path to a given wireless device, that is, a predetermined wireless device or a base station wireless device, the ID of the wireless device included as a node immediately below or directly above itself is obtained from the route information, and this ID is ID After being included in the call signal, the wireless communication data is transferred to the wireless device having this ID.

  Therefore, each wireless device that receives this transfer data also releases the intermittent reception wait state only when its ID is included in the ID call signal included in this transfer data. When the ID call signal does not include its own ID, the intermittent reception waiting state is not canceled.

  As a result, wireless devices that are not included as nodes in the multihop data transfer path remain in the intermittent reception waiting state.

  Each wireless device returns to the intermittent reception waiting state when receiving a response signal from the wireless device of the transfer destination.

  As described above, according to the present invention, the activation signal for shifting from the intermittent reception waiting state to the normal wireless reception state is used as an ID call signal, so that a plurality of wireless devices are within the reach of the activation signal. Even in this case, only the wireless device of the communication destination can be activated, and the power consumption of the wireless device can be reduced. In addition, by setting the activation signal as a code pattern, the probability of erroneous power activation due to noise can be reduced, so that the power consumption of the wireless device can be reduced, and only the correct signal can be received. Can improve the reliability. Furthermore, since there is no intermittent waiting depending on time, real-time data transfer can be performed.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  Referring to FIG. 1, a configuration of a multi-hop wireless communication system using the intermittent reception waiting technique according to an embodiment of the present invention is shown. Consider multi-hop wireless data transfer performed between the base station wireless device 32 (ID0) and the wireless devices 33-36 (ID1-4).

  The base station control server 31 sends a control signal to the radio devices 33 to 36 through the base station radio device 32 connected by the communication cable 38 and receives a response signal from the radio devices 33 to 36. It is assumed that a temperature sensor 37 is connected to the wireless device 35 (ID3). The wireless device 35 can acquire temperature data from the temperature sensor 37 through a wired cable. The temperature sensor 37 corresponds to the application unit 15 of FIG. 3 described below.

  Referring to FIG. 2, information on multihop data transfer paths held by each of the base station control server 31, the base station radio device 32, and the radio devices 33 to 36 is shown. The multi-hop data transfer route is constructed as follows (for the construction of multi-hop data transfer route, Takahiro Okuma, Daisuke Kawasaki, Takehiro Hokimoto, Masanobu Arai, “Realization of power-saving multi-hop routing function by call ID ", See also IEICE Technical Report, Vol. 103, No. 624, pages 39-42, January 22, 2004).

  First, the base station control server 31 transmits a detection signal to the base station radio apparatus 32 in order to make the base station radio apparatus (ID0) 32 detect the radio apparatus 33 (ID1). When the base station radio device 32 receives this detection signal, the base station radio device 32 tries to detect the radio device 33, and therefore transmits a detection signal having the detection destination ID ID1 and the detection source ID ID0. For the wireless device 33, it is assumed that the reception strength of the detection signal is equal to or higher than a predetermined strength and that a path can be constructed. Therefore, 0 is registered in the ID immediately above the route table of the wireless device 33 shown in FIG. After registration, a detection response signal is transmitted to the base station radio device 32. After receiving this detection response signal, the base station radio apparatus 32 registers 1 in the ID immediately below the route table of the base station radio apparatus 32 in FIG. Thereafter, the base station wireless device 32 transmits a link notification signal to the base station control server 31, and when the base station control server 31 receives the link notification signal, the route possessed by the base station control server 31 shown in FIG. The fact that the wireless device 33 (ID1) is connected directly below the base station wireless device 32 (ID0) is registered in the construction information.

  Next, the base station control server 31 transmits a detection signal to the base station radio apparatus 32 in order to detect the radio apparatus 34 (ID2) from the base station radio apparatus 32. When the base station wireless device 32 receives this detection signal, the base station wireless device 32 transmits a detection signal in order to attempt detection of the wireless device 34. Since the reception intensity of this detection signal is not less than a predetermined intensity for the wireless device 34, a path can be constructed. Therefore, 0 is registered as the immediately above ID in the route table of the wireless device 34 shown in FIG. After registration, the wireless device 34 transmits a detection response signal to the base station wireless device 32. When the base station radio apparatus 32 receives this detection response signal, it registers 2 in the ID immediately below the route table of the base station radio apparatus 32 shown in FIG. Thereafter, the base station wireless device 32 transmits a link notification signal to the base station control server 31, and when the base station control server 31 receives the link notification signal, the base station control server 31 stores the route notification information in the base station control server 31 shown in FIG. The fact that the wireless device 34 (ID2) is connected directly below the base station wireless device 32 (ID0) is registered.

  Next, the base station control server 31 transmits a detection signal to the base station radio apparatus 32 in order to detect the radio apparatus 35 (ID3) from the base station radio apparatus 32. When the base station wireless device 32 receives this detection signal, the base station wireless device 32 tries to detect the wireless device 35 and transmits the detection signal. Here, since the reception intensity of the detection signal is less than a predetermined intensity for the wireless device 35, a path cannot be constructed. Therefore, no detection response signal is returned. If the base station wireless device 32 retransmits the detection signal a predetermined number of times, or if a detection response signal does not return even after a predetermined time has elapsed after transmitting the detection signal, a communication failure terminal notification signal is sent to the base station control server 31 Send. When the base station control server 31 receives the communication failure terminal notification signal, it recognizes that the wireless device 35 cannot be detected from the base station wireless device 32, and proceeds to the next operation. Also for the wireless device 36 (ID4), since the reception strength of the detection signal from the base station wireless device 32 is less than a predetermined strength, a direct path is not established between the base station wireless device 32 and the wireless device 36.

  Next, the base station control server 31 transmits a detection signal to the base station wireless device 32 in order to detect the wireless device 35 that is not yet connected by the route from the wireless device 33 that is already connected by the route. When the base station radio device 32 receives this detection signal, it transfers it to the radio device 33. When the wireless device 33 receives this detection signal, it transmits a detection signal in order to attempt detection of the wireless device 35. Since the reception intensity of this detection signal is equal to or higher than a predetermined intensity for the wireless device 35, a path can be constructed. Therefore, 1 is registered in the ID immediately above the route table of the wireless device 35 shown in FIG. After registration, the wireless device 35 transmits a detection response signal to the wireless device 33, and after receiving this, the wireless device 33 registers 3 in the ID immediately below the route table of the wireless device 33 shown in FIG. Then, the wireless device 33 transmits a link notification signal to the base station wireless device 32 in order to notify the upstream side that the wireless device 35 is connected directly below. When the base station wireless device 32 receives the link notification signal, the base station wireless device 32 knows that the wireless device 35 is connected directly below the wireless device 33, and is downstream of the immediately below 1 in the route table of the base station wireless device 32 shown in FIG. Register 3 here. Thereafter, the base station wireless device 32 transmits a link notification signal to the base station control server 31 to notify the base station control server 31 that the wireless device 35 is connected directly below the wireless device 33. When the base station control server 31 receives the link notification signal, the wireless device 35 (ID3) is connected to the path construction information of the base station control server 31 shown in FIG. 2A directly below the wireless device 33 (ID1). Register that.

  Next, the base station control server 31 tries to detect the wireless device 36 from the wireless device 33. However, for the wireless device 36, the reception intensity of the detection signal from the wireless device 33 is less than a predetermined strength. It cannot be constructed and does not return a detection response signal. At this time, the wireless device 33 transmits a communication failure terminal notification signal to the base station wireless device 32 to inform the upstream side that the wireless device 36 is not connected directly below. When the base station radio apparatus 32 receives this communication failure terminal notification signal, it transmits a communication failure terminal notification signal to the base station control server 31. When the base station control server 31 receives the communication failure terminal notification signal, it recognizes that the wireless device 36 is not connected to the wireless device 33 and moves to the next operation.

  Next, the base station control server 31 transmits a detection signal to the base station radio apparatus 32 in order to detect the radio apparatus 36 remaining from the radio apparatus 34. Since the reception intensity of the detection signal from the radio apparatus 34 is equal to or higher than the predetermined intensity for the radio apparatus 36, the path can be constructed. Thereafter, the same processing as when the radio apparatus 35 is detected from the radio apparatus 33 is performed. Is called. The wireless device 36 registers 2 in the ID immediately above the route table of the wireless device 36 shown in FIG. The wireless device 34 registers 4 in the ID immediately below the route table of the wireless device 34 illustrated in FIG. The base station radio apparatus 32 registers 4 downstream from ID2 immediately below the route table of the base station radio apparatus 32 shown in FIG. Finally, the base station control server 31 knows that the wireless device 36 is connected directly below the wireless device 34 by receiving the link notification signal. Then, the fact that the wireless device 36 (ID4) is connected directly below the wireless device 34 (ID2) is registered in the route construction information held by the base station control server 31 shown in FIG.

  As described above, the route of FIG. 1 is constructed, and the route information of FIG. 2 is generated. The intermittent reception waiting technique is applied to this system using the path information of FIG.

  Referring to FIG. 3, the internal configuration of the wireless devices 33 to 36 is shown. When waiting for intermittent reception, only the power supply control unit 9, the intermittent reception unit 10, and the RF switch 11 are supplied with power from the power supply 8. The RF switch 11 serves to switch the wireless signal transmission path with the antenna 12 to the intermittent reception unit 10 or the wireless transmission / reception unit 13. When waiting for intermittent reception, it is switched to the intermittent reception unit 10. The intermittent receiving unit 10 repeats the reception waiting state and the sleep state at a constant cycle, and when receiving the calling signal of the own wireless device ID in the reception waiting state, the intermittent receiving unit 10 sends a control signal 17 to the power supply control unit 9 to 13 and CPU 14 are supplied with electric power. Further, a control signal 17 is sent to the RF switch 11 to switch the wireless signal transmission path to the wireless transmission / reception unit 13.

  The wireless transmission / reception unit 13 and the CPU 14 receive a wireless signal after power activation, and perform operation control according to the information written in the signal. The CPU 14 has a storage function for storing a program for holding the route table and performing operation control. However, the CPU 14 does not have this storage function, but another element may be in charge of it. In the operation control, if the application unit 15 needs to be activated, the CPU 14 sends a control signal 18 to the power supply control unit 9 to activate the application unit 15 (for example, the temperature sensor 37 in FIG. 1) to activate the application unit 15. Process.

  After completion of a series of processes in the wireless device, the CPU 14 searches the routing table, and writes the call signal of the transfer destination ID and the operation information subsequently to the transfer destination device written in the route table. Transmit the wireless signal. After the transmission, when there is a response from the transfer destination, the CPU 14 sends the control signal 19 to the RF switch 11 to switch the wireless signal transmission path to the intermittent receiving unit 10. In addition, the power supply to the wireless transmission / reception unit 13, the CPU 14, and the application unit 15 is stopped by sending a control signal 18 to the power supply control unit 9. Note that the power supply of the application unit 15 may be stopped after application processing is completed.

  Referring to FIG. 4, there is shown a relationship between power consumption during normal wireless communication by waiting for intermittent reception and when the CPU and the wireless transmission / reception unit are activated. When the ID call signal is received during intermittent reception, and the ID included in the signal is its own ID, the CPU and the wireless transmission / reception unit are activated to increase the power consumption compared to when waiting for intermittent reception. Yes.

  Referring to FIG. 5, a flowchart showing the flow of reception and transmission processing of each wireless terminal is shown. Each of the wireless devices 33 to 36 is in a state of waiting for intermittent reception shown in step 20 after the power is turned on. When each wireless terminal receives the ID call signal in step 21, it is determined in step 22 whether or not it is its own ID. If it is not its own ID, the process returns to the intermittent reception waiting state in step 20. If the ID is its own ID, in step 23, as described above, the radio transceiver and the CPU are activated and the RF switch is switched to shift to a state in which a normal radio signal can be received. In step 24, after receiving the normal radio, each radio terminal detects whether there is an error in the radio signal in step 25. If there is an error, the radio terminal returns to the intermittent reception wait state in step 20. If there is no error, the normal radio signal information is analyzed in step 26 and the process proceeds to the next process.

  If it is determined in step 27 that the own wireless device is not the final destination to which the application operation should be performed, the route table is referred to in step 28 and transmitted to the next transfer destination wireless device. If it is the final destination where the application operation is to be performed, the application unit is powered on in step 29 to perform the application processing operation. Thereafter, the power supply to the application unit is stopped, the wireless device ID to which a response signal is to be returned is searched with reference to the route table and transmitted.

  Regardless of whether it is the final destination ID or not, in step 30 after transmission, a response from the transmission destination wireless device is waited. If there is a response, the RF switch is controlled by the instruction of the CPU and the wireless signal transmission path is set. On the intermittent reception unit side, the power supply to the wireless transmission / reception unit and the CPU is stopped, and the process returns to the intermittent reception waiting state in step 20.

  If there is no response from the transmission destination wireless apparatus even after a certain number of retransmissions or waiting for a certain period of time, the transmission is stopped, and the process returns to the intermittent reception waiting state in step 20 as in the case where there is a response. .

  As described above, in multi-hop wireless communication, each wireless device normally operates only the intermittent receiving unit to wait for intermittent reception, and activates the CPU and the wireless transmitting / receiving unit only when a wireless signal addressed to its own ID arrives. As a result, the power for waiting for reception is reduced, and the power consumption of the wireless device is reduced.

  Next, as an example of data transfer by the present system, an operation in which the base station control server 31 transmits a control signal to the wireless device 35 and acquires data of the temperature sensor 37 connected to the wireless device 35 in FIG. 1 will be described.

  The base station control server 31 transmits a control signal 39 for acquiring data of the temperature sensor 37 connected to the wireless device 35 to the base station wireless device 32. After receiving the control signal 39, the base station wireless device 32 (ID0) transfers the control signal to the wireless device 35, so that the control signal is transmitted to the wireless device 35 (ID3) with reference to the route table of FIG. The control signal 40 is transmitted to the wireless device 33 (ID1), which is the wireless device directly under the transfer path (0-1-3). At this time, the ID call signal part ID is transmitted as 1. Although the control signal 40 has also reached the wireless device 34, the ID does not match, so that the control signal 40 remains in the intermittent reception waiting state.

  When the wireless device 33 receives the ID calling signal portion of the control signal 40, since the IDs match by 1, the wireless device 33 activates the CPU and the normal wireless transmission / reception unit, receives the normal signal portion of the control signal 40, and performs analysis. At this time, it is confirmed that the final destination ID included in the normal signal portion is 3. And after returning a response to the base station radio | wireless apparatus 32, with reference to the path | route table | surface shown in FIG.2 (c), it is right under the path | route (0-1-3) which transfers a control signal to the radio | wireless apparatus 35 (ID3). The control signal 41 is transmitted to the wireless device 35 (ID3) which is a wireless device.

  Similarly to the wireless device 33, the wireless device 35 receives the control signal 41 and returns a response to the wireless device 33. When receiving the response, the wireless device 33 stops the CPU and the normal wireless transmission / reception unit and returns to the intermittent reception waiting state.

  The wireless device 35 analyzes the control signal 41 and confirms that the final destination ID is 3 (that is, the wireless device 35 is the own wireless device). Therefore, the temperature sensor 37 is activated by the control signal, and the temperature sensor data is acquired. After the data acquisition, the temperature sensor 37 is stopped (as described above, it may be simultaneously with returning to the intermittent reception waiting state). And in order to transmit the response signal containing temperature sensor data to the base station control server 31, with reference to the path | route table shown in FIG.2 (e), the radio | wireless apparatus which is a radio | wireless apparatus immediately above an own radio | wireless apparatus (ID3) The response signal 42 is transmitted to 33 (ID1).

  Thereafter, the same transmission / reception operation is repeated until the base station radio apparatus 32 receives the response signal 43. The base station radio device 32 may apply the intermittent reception waiting technique as in the case of the radio devices 33 to 36 (in this case, when receiving a control signal from the base station control server and a response signal from the radio device). As long as the base station control server 31 is placed in a place where the power can be sufficiently taken, the intermittent reception waiting technique may not be used. And finally, the base station control server 31 acquires the data of the temperature sensor 37 by receiving the response signal 44.

  As shown in FIG. 6, the present invention can be applied to any multi-hop route configuration. And it is applicable also to a structure without a base station control server. Further, the number of wireless devices shown in this specification is not limited. Furthermore, it is not limited to the method of attaching ID described in this specification.

  Moreover, as shown in FIG. 7, the application connected to each wireless device is not limited to the temperature sensor, and may be various sensors and various applications.

It is the figure which showed the structure of the multihop radio | wireless communications system using the intermittent reception waiting technique of one Embodiment of this invention. It is the information regarding the multihop data transfer path | route which each apparatus of the system of FIG. 1 holds. It is the figure which showed the internal structure of each radio | wireless apparatus. It is the figure which showed the relationship of the power consumption at the time of intermittent reception waiting in each radio | wireless apparatus, and normal radio | wireless communication by CPU and a radio | wireless transmission / reception part starting. It is a flowchart which shows the flow of a reception and transmission process of each radio | wireless apparatus. It is an example of the multihop data transfer path | route different from FIG. It is the figure which showed the structure of the multihop radio | wireless communications system by which various sensors and various applications were provided in each radio | wireless apparatus.

Explanation of symbols

8 Power supply 9 Power supply control unit 10 Intermittent reception unit 11 RF switch 12 Antenna 13 Wireless transmission / reception unit 14 CPU
DESCRIPTION OF SYMBOLS 15 Application part 16 Radio | wireless apparatus 17-19 Control signal 20-30 Step 31 Base station control server 32 Base station radio | wireless apparatus (ID0)
33 Wireless device (ID1)
34 Wireless device (ID2)
35 Wireless device (ID3)
36 Radio equipment (ID4)
37 temperature sensor 38 communication cable 39 to 41 control signal 42 to 44 response signal 45 base station radio device 46 to 53 radio device 54 base station control server 55 base station radio device (ID0)
56 Wireless device (ID1)
57 Wireless device (ID2)
58 Wireless device (ID3)
59 Wireless device (ID4)
60 Communication cable 61-64 Various sensors and various applications

Claims (5)

Using the multi-hop data transfer path constructed between a base station wireless device controlled by a base station control server and a plurality of wireless devices distributed, the base station wireless device is connected to the predetermined wireless device. A multi-hop wireless communication method for performing wireless communication between
Each of the base station wireless device and the wireless device has route information related to a multi-hop data transfer route that is included as a node,
The wireless communication data exchanged between the base station wireless device and the predetermined wireless device is in a state of waiting for intermittent reception in addition to a normal wireless signal including the ID of the base station wireless device and the predetermined wireless device. It is assumed that an ID call signal used to activate a specific wireless device is added,
The base station wireless device or the predetermined wireless device refers to the route information, and calls the ID of the wireless device immediately below or directly above the ID in the multi-hop data transfer route that is the start point or the end point of the base station wireless device. Included in the signal, to transmit the wireless communication data,
Each wireless device is
Upon receiving the wireless communication data, analyzing the ID call signal included in the wireless communication data, and releasing the intermittent reception waiting state only when the ID call signal includes its own ID When,
When the intermittent reception waiting state is canceled, the normal wireless signal included in the wireless communication data is analyzed, and if the ID included in the normal wireless signal is not its own ID, the wireless having the ID from itself An ID of a wireless device included as a node immediately below or immediately above itself in the multihop data transfer route to the predetermined wireless device or the base station wireless device as a device is obtained from the route information, and this ID is obtained from the ID Including the call signal and transferring the wireless communication data to the wireless device having the ID;
And a step of returning to the intermittent reception waiting state when a response signal is received from a transfer destination wireless device.   The method according to claim 1, wherein the base station wireless device and the predetermined wireless device return to the intermittent reception waiting state after transmitting the wireless communication data. A wireless device used in a multi-hop wireless communication system,
Means for holding route information relating to a multi-hop data transfer route included as a node;
Referring to the route information, the ID of the wireless device immediately below or directly above the multi-hop data transfer route that is the start point or the end point of itself is used to activate a specific wireless device that is in a state of waiting for intermittent reception. Means for adding the ID call signal to a normal wireless signal including the ID of the transmission source and the transmission destination, and transmitting these as wireless communication data.
Means for analyzing the ID call signal included in the wireless communication data upon receiving the wireless communication data, and releasing the intermittent reception waiting state only when the ID call signal includes its own ID When,
When the intermittent reception waiting state is canceled, the normal wireless signal included in the wireless communication data is analyzed, and if the ID included in the normal wireless signal is not its own ID, the wireless having the ID from itself An ID of a wireless device included as a node immediately below or directly above itself in a multi-hop data transfer route to the device is obtained from the route information, and this ID is included in the ID call signal, and a wireless device having this ID Means for transferring the wireless communication data to a device;
A wireless device having means for returning to a state of waiting for intermittent reception when a response signal is received from a wireless device as a transfer destination.   The apparatus according to claim 3, further comprising means for returning to a state of waiting for intermittent reception after transmitting the wireless communication data. A base station control server;
A base station radio apparatus controlled by the base station control server and configured by the radio apparatus according to claim 3 or 4,
5. A multi-hop wireless communication system having a plurality of wireless devices configured by the wireless device according to claim 3 or 4, wherein the wireless devices are distributed and connected to the base station wireless device by a multi-hop data transfer path.

Images