JP2017034632A - Radio communication control device and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication unit and a radio communication system, which perform data communication related to the control of non-contact charging, capable of simplifying a procedure to identify a charging station.SOLUTION: A vehicle side radio communication unit 24 controls data communication related to the control of non-contact charging processing. The data communication is performed through one of a plurality of radio communication networks, using a network identification code which identifies each radio communication network. The vehicle side radio communication unit 24 includes the functions of: receiving each network identification code from a plurality of station side radio communication units 14; determining whether or not network identification codes related to the plurality of station side radio communication units 14 are identical; transmitting, when there is an identical network identification code among a plurality of station side radio communication units 14, a network identification code change request to at least one of the station side radio communication units 14 related to the identical network identification code.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a radio communication control apparatus and a radio communication system.

  In recent years, plug-in hybrid vehicles and EV vehicles are rapidly developing, and charging stations for charging vehicles are expected to spread. Examples of the charging method include a contact charging method in which a stand and a vehicle are connected by a charging cable, and a non-contact charging method in which electric power is transmitted in a contactless manner using a resonance coil or the like.

  In charge control of a vehicle (EV, PHV, etc.), communication between the vehicle and a charging station is required. In a charging system in which a charging station and a vehicle are connected by a charging cable, wired communication is possible, but wireless communication is often required for non-contact charging.

  In wireless communication, communication is performed via an access point using a network identification code (such as SSID) that identifies a communication network or a device identification code (such as BSSID or MAC address) that identifies a communication partner. Patent Document 1 describes an example of a technique for specifying a device using an ID signal.

  In charging control of a vehicle, when charging stations belong to different communication networks (when using different SSIDs, when using different encryption keys even if the SSID is the same), the charging station is specified by specifying the communication network. It is possible to specify. On the other hand, when a plurality of charging stations belong to the same communication network, it is necessary to specify each charging station using a BSSID or a MAC address after specifying the communication network.

JP 2014-138547 A

  However, the conventional technique has a problem that the procedure for specifying the charging station is complicated.

  For example, when a plurality of charging stations belong to the same communication network, the charging station cannot be specified only by the network identification code. Therefore, it is necessary to implement a protocol for specifying the charging station using BSSID or MAC address. become.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a wireless communication control device and a wireless communication system capable of simplifying a procedure for specifying a charging station.

  In order to solve the above-described problem, a wireless communication control device according to the present invention is a wireless communication control device that controls data communication related to control of contactless charging processing, and the data communication is performed by any of a plurality of wireless communication networks. The wireless communication control device includes a function for receiving network identification codes from a plurality of wireless communication devices, and a plurality of wireless communication devices. If the network identification code related to the same network identification code and the network identification code related to a plurality of wireless communication devices are the same, at least one of the wireless communication devices related to the same network identification code And a function of transmitting a request for changing the network identification code.

  According to the present invention, when the network identification codes related to a plurality of charging stations are the same, at least one network identification code is changed.

The network identification code may include SSID or PANID.
The network identification code may not include a BSSID.
Upon receiving the change request, the wireless communication device may determine a new network identification code and transmit the new network identification code to the wireless communication control device.
When receiving the new network identification code, the wireless communication control device determines whether or not the new network identification code is included in the prohibition list indicating the network identification code that should not be used, and is included in the prohibition list. If so, a new change request may be sent.
□ The wireless communication control device sends a prohibition list indicating a network identification code that should not be used together with the change request,
The wireless communication device may determine a new network identification code not included in the prohibition list in accordance with the change request and the prohibition list, and may transmit the new network identification code to the wireless communication control device.

  In order to solve the above-described problem, a wireless communication system according to the present invention includes the above-described wireless communication control device and a wireless communication device, and the plurality of wireless communication devices respond to a change request with a network identification code associated with itself. It has a function to change.

  According to the present invention, when the network identification code is duplicated, the duplication is automatically eliminated, so that the procedure for specifying the charging station can be simplified.

It is a figure which shows the example of a structure containing the non-contact charge control system which concerns on Embodiment 1. FIG. It is a figure which shows the outline | summary of the process regarding non-contact charge. 3 is a flowchart showing a flow of processing of a vehicle-side wireless communication device related to SSID according to the first embodiment. 3 is a flowchart showing a process flow of a stand-side wireless communication device related to the SSID according to the first embodiment. It is a figure showing a structure in case the communication range of several stand side radio | wireless communication apparatuses overlaps. 6 is a flowchart showing a flow of processing of a vehicle-side wireless communication device related to SSID according to a second embodiment. 10 is a flowchart showing a process flow of a stand-side wireless communication device related to the SSID according to the second embodiment. 10 is a flowchart illustrating a flow of processing of a vehicle-side wireless communication device related to SSID according to Embodiment 3. 10 is a flowchart showing a process flow of a stand-side wireless communication device related to an SSID according to a third embodiment. 10 is a flowchart showing a flow of processing of a vehicle-side wireless communication device related to SSID according to a fourth embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 shows an example of a configuration including a contactless charging control system and a wireless communication system according to Embodiment 1 of the present invention. The charging station 10 is installed, and the vehicle 20 stops near the charging station 10 in order to receive power from the charging station 10.

  The charging stand 10 includes a power feeding device 11, a power feeding cable 12, a power feeding coil 13, a stand side wireless communication device 14, and an antenna 15. The power supply device 11 receives power from a power supply device (not shown) and transmits the power to supply power to an external electric device (for example, the vehicle 20). The power feeding cable 12 transmits the power transmitted from the power feeding device 11 to the power feeding coil 13. The power feeding coil 13 is a non-contact power feeder, and performs non-contact power feeding with an external power receiver (for example, a charging coil 23 described later) by electromagnetic induction or resonance.

  The stand-side wireless communication device 14 can be configured as an access point having a wireless communication function, for example. The stand-side wireless communication device 14 transmits and receives data related to the control of the non-contact charging process using a plurality of (for example, 13) channels. Each channel is assigned a different frequency band, for example. As described above, the stand-side wireless communication device 14 is a component of the non-contact charging control system in the first embodiment.

  As a wireless transmitter, the stand-side wireless communication device 14 acquires communication data from the power supply apparatus 11 and transmits it to an external wireless receiver (for example, a vehicle-side wireless communication device 24 described later) via an antenna 15 in the form of a wireless packet. Send. Further, the stand-side wireless communication device 14 receives a wireless packet via an antenna 15 from an external wireless transmitter (for example, the vehicle-side wireless communication device 24) as a wireless receiver, reproduces communication data, and regenerates the power supply device 11. To provide.

  The vehicle 20 includes a battery 21, a charging device 22, a charging coil 23, a vehicle-side wireless communication device 24, and an antenna 25. The battery 21 stores electric power. The charging coil 23 is a non-contact power receiver, and performs non-contact power reception with an external power feeder (for example, the power feeding coil 13) by electromagnetic induction or resonance. The charging device 22 receives power from the charging coil 23 and transmits the power to the battery 21.

  As a wireless transmitter, the vehicle-side wireless communication device 24 acquires communication data from the charging device 22 and transmits it to the external wireless receiver (for example, the stand-side wireless communication device 14) via the antenna 25 in the form of a wireless packet. . Further, the vehicle-side wireless communication device 24 receives a wireless packet from an external wireless transmitter (for example, the stand-side wireless communication device 14) via the antenna 25 as a wireless receiver, reproduces communication data, and recharges the charging device 22. To provide.

  Communication between the charging device 22 and the vehicle-side wireless communication device 24 can be realized using, for example, a CAN (Car Area Network). In this case, the vehicle-side wireless communication device 24 transmits the communication data received from the CAN via the antenna 25, and transmits the data received from the antenna 25 to the CAN.

  In FIG. 2, the outline | summary of the process regarding non-contact charge is shown. The processing related to contactless charging includes processing for transmitting and receiving data related to control of contactless charging processing, and proceeds in the following order, for example.

  First, a beacon for notifying the presence of the charging station 10 is transmitted from the stand side wireless communication device 14 to the vehicle side wireless communication device 24 (step S1). This transmission is performed, for example, periodically in a broadcast manner via a specific wireless communication network. The vehicle-side wireless communication device 24 detects this beacon by executing a beacon scan process.

  The beacon scan process is performed by continuing the beacon detection process for a predetermined time in a predetermined frequency range based on, for example, a predetermined protocol (WIFI standard or the like). By this scan, the vehicle-side wireless communication device 24 searches for the presence of the stand-side wireless communication device 14 existing within the communication range.

  When detecting the beacon, the vehicle-side wireless communication device 24 transmits a communication connection request to the stand-side wireless communication device 14 (step S2). Based on this connection request, communication is established between the stand-side wireless communication device 14 and the vehicle-side wireless communication device 24 via a specific wireless communication network (step S3). After the communication is established, based on the control of the power supply device 11, weak power is output from the power supply device 11 to the charging device 22 via the power supply coil 13 and the charging coil 23 (step S4).

  Based on the result of the output of the weak power (for example, the voltage fluctuation state in the feeding coil 13 and the charging coil 23), the feeding device 11 determines whether or not the pairing between the charging stand 10 and the vehicle 20 is established (step). S5). When it is determined that pairing is established, power transmission for non-contact charging is started from the power feeding coil 13 to the charging coil 23 based on the control of the power feeding device 11, and a charging process is executed accordingly (step S6). ).

  In step S6, transmission / reception of control information (for example, related to control of power transmission operation) is also performed along with transmission / reception of power. That is, wireless communication is performed between the stand-side wireless communication device 14 and the vehicle-side wireless communication device 24 even during execution of step S6.

  When the charging process is completed, the vehicle-side wireless communication device 24 transmits a communication disconnection request to the stand-side wireless communication device 14 (step S7). In the example of FIG. 2, the process related to the non-contact charging is completed when the execution of step S7 is completed. Thereby, control of the non-contact charge with respect to the vehicle 20 is complete | finished.

  As described above, both the stand-side wireless communication device 14 and the vehicle-side wireless communication device 24 are wireless communication devices that perform data communication related to control of contactless charging. Further, this data communication is performed using a network identification code that identifies each wireless communication network via one of the plurality of wireless communication networks.

  The relationship between the wireless communication network and the channel, frequency band, etc. can be arbitrarily determined. For example, one wireless communication network may be configured over a plurality of channels, in which case different wireless communication networks may share one or more channels, and each wireless communication network may exclusively use each channel. May be used for In addition, one wireless communication network may use only a single channel, in which case different wireless communication networks may share the channel, and each wireless communication network uses each channel exclusively. May be.

  In addition, the correspondence relationship between the wireless communication device and the wireless communication network is not necessarily fixed and can be changed. However, when each wireless communication device performs data communication related to control of contactless charging, at a temporary point, This is done via a single wireless communication network.

  Data communication is performed based on, for example, the WIFI standard. In this embodiment, an SSID (Service Set IDentifier) is used as an example of a network identification code. The SSID is specified as an alphanumeric string of up to 32 characters, for example, and can be freely set for each wireless communication device. When a plurality of wireless communication devices use the same SSID, the wireless communication devices can communicate with each other via a wireless communication network specified by the SSID. In that case, it can be said that these wireless communication devices belong to the same wireless communication network. In this embodiment, the network identification code does not include BSSID.

  In the process related to contactless charging, a beacon, a connection request, and a disconnection request are all examples of data related to control of the contactless charging process. The beacon is data for notifying the presence of the power supply apparatus 11 (or the charging station 10 including the power supply apparatus 11). In this embodiment, the beacon includes an SSID. That is, in this embodiment, the beacon is data for specifying the power supply apparatus 11 (or the charging station 10 including the power supply apparatus 11). When there are a plurality of power supply devices, the wireless communication devices related to the respective power supply devices can transmit beacons having different contents so that they can be distinguished from each other (in some cases, the plurality of wireless communication devices are the same). May send a beacon of content).

  Hereinafter, the flow of processing of the wireless communication control device and the stand-side wireless communication device 14 will be described with reference to FIGS.

  FIG. 3 is a flowchart showing the flow of processing of the wireless communication control device. In the present embodiment, the vehicle-side wireless communication device 24 functions as a wireless communication control device. The process in FIG. 3 is executed, for example, periodically or in response to a driver's instruction. Further, the wireless communication control device (the vehicle-side wireless communication device 24 in the present embodiment) and a plurality of wireless communication devices (the stand-side wireless communication device 14 in the present embodiment) constitute a wireless communication system.

  FIG. 4 is a flowchart showing the processing flow of the stand-side wireless communication device 14 related to SSID. The process of FIG. 4 is executed, for example, in response to receiving an SSID change request to be described later.

  Note that the stand-side wireless communication device has a function of determining the SSID associated with itself, regardless of the processing of FIG. This may be determined in any way, for example, it may be determined to use the last used SSID, or may be determined to use a fixed SSID (default value at power-on, etc.) It may be determined that a randomly generated SSID is used. For example, the SSID may be in a format of “WirelessChargerSystemXXXX” (a character string of “WirelessChargerSystem” added with a randomly generated 4-character alphanumeric string).

  FIG. 5 is a diagram illustrating a configuration in a case where communication ranges of the plurality of stand-side wireless communication devices 14 are overlapped. The communicable range 30a for the stand-side wireless communication device 14a of the charging station 10a that executes the processing of FIG. 4 and the communicable range 30b for the stand-side wireless communication device 14b of the charging station 10b that similarly executes the processing of FIG. Is formed. The vehicle-side wireless communication device 24 of the vehicle 20 is placed in an overlapping portion 30c between the communicable range 30a and the communicable range 30b. In such a case, the vehicle-side wireless communication device 24 can receive the respective SSIDs from the stand-side wireless communication devices 14a and 14b.

  In the example of FIG. 5, the stand-side wireless communication devices 14a and 14b are not in the mutual communicable ranges 30a and 30b, but either one or both are in the mutual communicable ranges 30a and 30b. Also good.

  In the process of FIG. 3, the vehicle-side wireless communication device 24 first receives the SSID from the stand-side wireless communication device 14 (stand-side wireless communication devices 14a and 14b in the example of FIG. 5) (step S11). In this embodiment, since the SSID is included in the beacon, this process can be realized by the above-described beacon scan process.

  Here, if the stand-side wireless communication devices 14a and 14b use the same SSID, the vehicle-side wireless communication device 24 cannot specify the stand-side wireless communication device using only the SSID.

  The vehicle-side wireless communication device 24 that has received the SSID from each stand-side wireless communication device 14 in step S11 determines whether or not the SSIDs related to the plurality of stand-side wireless communication devices 14 are the same (step S12). When SSIDs are received from three or more stand-side wireless communication devices 14, it is determined whether or not the same devices exist. When no SSID is received from any of the stand side wireless communication devices 14 or when the SSID is received only from a single stand side wireless communication device 14, step S12 and subsequent processing (in FIG. 3) In the example, step S13) may be omitted.

  When the SSIDs related to the plurality of stand-side wireless communication devices 14 are the same, the vehicle-side wireless communication device 24 transmits an SSID change request to all the stand-side wireless communication devices 14 related to the same SSID. (Step S13).

  Thereafter, the vehicle-side wireless communication device 24 ends the process of FIG. Subsequent processing can be appropriately designed by those skilled in the art. For example, the charging process may be executed with either of the stand side wireless communication devices 14a and 14b (in this case, step S2 and subsequent steps in FIG. 2 are executed with the stand side wireless communication device). The process may be terminated without executing the charging process (in this case, the process of FIG. 2 may be executed separately).

  Next, a description of FIG. When the SSID change request is transmitted in step S13 of FIG. 3, the stand-side wireless communication device 14 that is the target receives the SSID change request (step S21).

  When the stand-side wireless communication device 14 receives the SSID change request, the stand-side wireless communication device 14 changes the SSID related to itself (step S22). It is determined that an SSID different from the SSID used until then is used. A new SSID can be generated randomly, for example, in the format "WirelessChargerSystemXXXX" (with the addition of a randomly generated 4-character alphanumeric string to the string "WirelessChargerSystem") as in the above example. It may be.

  Thereafter, the stand-side wireless communication device 14 activates the access point (step S23). If the access point is already activated, it may be restarted. Thereafter, the stand-side wireless communication device 14 ends the process of FIG.

  As described above, according to the vehicle-side wireless communication device 24 according to the present invention, when the SSIDs related to a plurality of charging stations are the same, the SSID change request is transmitted to them, and the SSID is changed accordingly. The Therefore, duplication is automatically eliminated and the charging station can be specified only by the SSID, and the procedure for specifying the charging station can be simplified. For example, a charging station can be specified without using a BSSID, a MAC address, or the like.

  As a prior art, a configuration in which the SSID is defined in advance so as to be different for each charging stand is known. Compared with such a configuration, the present invention does not need to manage the association between the SSID and the charging stand, and can reduce the number of management steps. However, when the increase in the management man-hour can be allowed, the association between the SSID and the charging station may be managed. For example, a plurality of SSIDs may be defined in advance for each charging station or common to a plurality of charging stations, and one of them may be selected and used in response to an SSID change request.

  Moreover, the structure which identifies a charging stand based only on fixed SSID as a prior art is known. In such a configuration, depending on the protocol used, when communication between the vehicle and the charging station is interrupted, the vehicle may be connected to another charging station having the same SSID by roaming processing. May not be able to communicate normally. On the other hand, the present invention can also reduce the possibility of such a situation by reducing the possibility of overlapping SSIDs.

  The change in step S22 may not necessarily eliminate SSID duplication reliably. For example, when the SSID is changed randomly, the new SSID after the change may coincide with the one before the change, but even in such a configuration, the SSID remains the same. The possibility can be reduced.

Embodiment 2. FIG.
In the first embodiment, the vehicle-side wireless communication device 24 does not have a function of controlling the contents of the new SSID determined by the stand-side wireless communication device 14 in step S22. The second embodiment is configured such that the vehicle-side wireless communication device 24 has such a control function in the first embodiment.

  Hereinafter, the difference between the wireless communication control device and the stand-side wireless communication device 14 from the first embodiment will be described with reference to FIGS. 6 and 7.

  FIG. 6 is a flowchart showing the flow of processing of the wireless communication control device. In the present embodiment, the vehicle-side wireless communication device 24 functions as a wireless communication control device. FIG. 7 is a flowchart showing a process flow of the stand-side wireless communication device 14 related to SSID.

  Steps S111 to S113 in FIG. 6 are the same as the processes in steps S11 to S13 in FIG. After execution of step S113, the vehicle-side wireless communication device 24 receives the scheduled change SSID notification (step S114). The change schedule SSID notification is transmitted from the stand-side wireless communication device 14 in step S122 (FIG. 7) described later, for example.

  Steps S121, S123, and S124 in FIG. 7 are the same as steps S21, S22, and S23 in FIG. 4, respectively. In the second embodiment, when the stand-side wireless communication device 14 receives the SSID change request, the stand-side wireless communication device 14 determines a new SSID and transmits a change scheduled SSID notification including the new SSID before changing the SSID. Thus, the new SSID is notified to the vehicle-side wireless communication device 24 (step S122).

  As described above, in the second embodiment, as in the first embodiment, the duplication is automatically resolved and the charging station can be specified only by the SSID, and the procedure for specifying the charging station is simplified. can do.

  Furthermore, in the second embodiment, the vehicle-side wireless communication device 24 can know a new SSID before the change. For this reason, for example, processing such as SSID scanning after the change can be omitted.

Embodiment 3 FIG.
The third embodiment is configured such that the vehicle-side wireless communication device 24 more positively controls the SSID in the second embodiment. Hereinafter, the difference between the wireless communication control device and the stand-side wireless communication device 14 from the second embodiment will be described with reference to FIGS. 8 and 9.

  FIG. 8 is a flowchart showing the flow of processing of the wireless communication control device. In the present embodiment, the vehicle-side wireless communication device 24 functions as a wireless communication control device. FIG. 9 is a flowchart showing a process flow of the stand-side wireless communication device 14 related to SSID.

  Steps S111, S112, and S114 in FIG. 8 are the same as steps S111, S112, and S114 in FIG. 6, respectively. In the third embodiment, the vehicle-side wireless communication device 24 transmits a prohibition list together with the SSID change request (step S113a). The prohibition list includes zero or more SSIDs, and indicates SSIDs that the stand-side wireless communication device 14 should not use as new SSIDs.

  As shown in FIG. 9, the stand-side wireless communication device 14 receives the SSID change request and the prohibition list (step S121a), newly determines an SSID that is not included in the prohibition list, and includes this new SSID. This new SSID is notified to the vehicle-side wireless communication device 24 by transmitting the scheduled change SSID notification (step S122a). The process for determining an SSID that is not included in the prohibition list may be, for example, a process of determining an SSID at random and redeciding the SSID at random when the determined SSID is included in the prohibition list. it can. Subsequent processing (steps S123 and S124) is the same as in FIG.

  As described above, in the third embodiment as well, in the same manner as in the first and second embodiments, the duplication is automatically resolved and the charging station can be specified only by the SSID, and the procedure for specifying the charging station is performed. It can be simplified.

  Furthermore, in the third embodiment, it is possible to further reduce the possibility that the changed SSIDs are duplicated again.

  Note that generation and update processing of the prohibition list can be appropriately designed by those skilled in the art. For example, the prohibition list may be initially empty (that is, one that includes 0 SSIDs), and the detected SSID may be added to the prohibition list each time step S111 is executed. Further, an SSID that has passed a certain time (for example, 24 hours) from detection may be deleted from the prohibition list.

  Further, when the vehicle-side wireless communication device 24 is a wireless communication control device as in this embodiment, it is prohibited at an appropriate timing (when the vehicle-side wireless communication device 24 is turned on, when a charging operation is completed, etc.). The list may be empty.

Embodiment 4 FIG.
The fourth embodiment is configured such that the vehicle-side wireless communication device 24 more positively controls the SSID in the second embodiment. Hereinafter, with reference to FIG. 10, the difference from the second embodiment regarding the processing flow of the wireless communication control apparatus will be described. The processing flow of the stand side wireless communication device 14 in the fourth embodiment is not particularly described, but for example, the same processing as in the second embodiment (FIG. 7) can be performed.

  FIG. 10 is a flowchart showing the flow of processing of the wireless communication control apparatus. In the present embodiment, the vehicle-side wireless communication device 24 functions as a wireless communication control device. Steps S111 to S114 in FIG. 10 are the same as steps S111 to S114 in the second embodiment (FIG. 6), respectively. In the fourth embodiment, when the vehicle-side wireless communication device 24 receives the change scheduled SSID notification including the new SSID, the vehicle-side wireless communication device 24 determines whether or not the received new SSID is included in the prohibition list (step S115). A person skilled in the art can appropriately design the prohibition list generation and update process.

  If the scheduled change SSID received from any of the stand side wireless communication devices 14 is included in the prohibition list, the vehicle side wireless communication device 24 returns the processing for the stand side wireless communication device 14 to step S113. In other words, in this case, the vehicle-side wireless communication device 24 transmits a new SSID change request, and the stand-side wireless communication device 14 that has attempted to change to the SSID included in the prohibition list is scheduled to change accordingly. The SSID is newly determined. If the received scheduled change SSID is not included in the prohibition list, the vehicle-side wireless communication device 24 ends the processing of FIG. 10 for the stand-side wireless communication device 14.

  As described above, in the fourth embodiment as well, in the same manner as in the first to third embodiments, the duplication is automatically resolved and the charging station can be specified only by the SSID, and the procedure for specifying the charging station is performed. It can be simplified.

  Furthermore, in the fourth embodiment, it is possible to further reduce the possibility that the changed SSIDs are duplicated again.

  If the change scheduled SSID is not included in the prohibition list, information indicating that the change scheduled SSID is not included in the prohibition list is transmitted from the vehicle-side wireless communication device 24 to the stand-side wireless communication device 14. Good. The stand-side wireless communication device 14 may stand by without executing the SSID change (for example, step S123 in FIG. 7) until this information is received.

  The third embodiment and the fourth embodiment may be combined. That is, in the fourth embodiment, the vehicle-side wireless communication device 24 executes step S113a of FIG. 8 instead of step S113 of FIG. 10, and the stand-side wireless communication device 14 performs the processing of FIG. 9 instead of the processing of FIG. May be executed.

In the above-described first to fourth embodiments, the following modifications can be made.
In the first to fourth embodiments, the vehicle-side wireless communication device 24 transmits an SSID change request to all the stand-side wireless communication devices 14 related to the same SSID (steps S13, S113, S113a). As a modification, the vehicle-side wireless communication device 24 may not necessarily transmit the SSID change request to all the stand-side wireless communication devices 14 related to the same SSID.

  For example, if the SSID change request is transmitted to all but one of the stand side wireless communication devices 14 related to the same SSID, the duplication can be eliminated. In addition, by transmitting the SSID change request to only one of the stand-side wireless communication devices 14 related to the same SSID, it is possible to reduce duplication. Therefore, there is a possibility that the charging station can be specified only by the SSID. Become bigger. As described above, the vehicle-side wireless communication device 24 may transmit the SSID change request to at least one of the wireless communication devices related to the same SSID.

  In the case where the SSID change request is transmitted to only a part of the stand side wireless communication devices 14 related to the same SSID, the standard for selecting the stand side wireless communication device 14 to which the SSID change request is to be transmitted is appropriately designed by those skilled in the art. Is possible. For example, you may select at random. Or you may select based on RSSI (received signal strength), for example. In that case, the RSSI of each stand-side wireless communication device 14 may be compared with a predetermined threshold, and the SSID change request may be transmitted only to the stand-side wireless communication device 14 whose RSSI is equal to or greater than the threshold.

  In Embodiments 1 to 4, the vehicle-side wireless communication device 24 is a wireless communication control device, but other devices may function as the wireless communication control device. For example, an independent wireless communication control device (that is, a wireless communication control device that is neither the stand-side wireless communication device 14 nor the vehicle-side wireless communication device 24) may be used. In this case, the wireless communication control device may execute maintenance software, thereby realizing a function as the wireless communication control device.

  This independent wireless communication control device may be mounted on the vehicle 20 or installed in a charging facility. When installed in the charging facility, it may be mounted on the charging stand 10, may be incorporated in the stand-side wireless communication device 14, or may be installed at other positions in the charging facility. In particular, when installed in a position other than the stand-side wireless communication device 14 (such as a position other than the charging station 10 in the vehicle 20 or the charging facility), the SSID overlap state that cannot be detected by the stand-side wireless communication device 14 alone (see FIG. (State as shown in FIG. 5) may also be detected.

  Arbitrary communication control can be performed in relation to the transmission of the SSID change request (steps S13, S113, S113a). For example, the vehicle-side wireless communication device 24 transmits a connection request similar to that in step S2 in FIG. 2, and thereby, between the vehicle-side wireless communication device 24 and the stand-side wireless communication device 14 as in step S3 in FIG. Then, communication is established, and then the vehicle-side wireless communication device 24 may transmit an SSID change request, and then the vehicle-side wireless communication device 24 may transmit a disconnection request similar to step S7 in FIG.

  The execution timing of the SSID changing process (steps S22 and S23 and steps S123 and S124) can be arbitrarily designed according to the convenience of the system. For example, in the case of the first embodiment, steps S21 to S23 do not need to be executed continuously in a short time, and other processing (such as charging control processing) is executed between step S21 and step S22 or S23. May be.

  In the first to fourth embodiments, the network identification code is the SSID, but other information may be used instead of or in addition to the SSID. For example, when performing data communication based on the ZigBee standard, PANID (Personal Area Network ID) may be used as a network identification code.

  Furthermore, information other than SSID or PANID may be included in the network identification code. For example, information indicating an encryption method may be included, and a combination of an SSID and encryption method information (a flag indicating whether the WEP method or the WPA2 method is used) may be used as the identification code. Further, the encryption key itself may be included, and a combination of the SSID and the encryption key (WEP key or the like) may be used as the identification code.

  In particular, if an identification code is formed by combining SSID and information related to encryption, interference can be avoided even when there are a plurality of stand side wireless communication devices 14 that use the same SSID.

  In the first to fourth embodiments, the stand-side wireless communication device 14 randomly generates a new SSID (steps S22, S122, and S122a). However, the new SSID determined by the stand-side wireless communication device 14 does not need to be randomly generated and may be generated based on a deterministic rule. Moreover, you may produce | generate by the method which combined the randomness and the deterministic rule.

  14, 14a, 14b Stand side wireless communication device (wireless communication device), 24 Vehicle side wireless communication device (wireless communication control device).

Claims (7)

A wireless communication control device for controlling data communication related to control of contactless charging processing,
The data communication is performed using a network identification code that identifies each wireless communication network via any of a plurality of wireless communication networks,
The wireless communication control device
A function of receiving the network identification code from a plurality of wireless communication devices;
A function of determining whether or not the network identification codes related to a plurality of the wireless communication devices are the same;
A function of transmitting a network identification code change request to at least one of the wireless communication apparatuses related to the same network identification code when the network identification codes related to the plurality of wireless communication apparatuses are the same; A wireless communication control device.   The wireless communication control apparatus according to claim 1, wherein the network identification code includes an SSID or a PANID.   The wireless communication control device according to claim 1, wherein the network identification code does not include a BSSID.   The wireless communication device according to any one of claims 1 to 3, wherein, upon receiving the change request, the wireless communication device determines a new network identification code and transmits the new network identification code to the wireless communication control device. The wireless communication control device described.   When receiving the new network identification code, the wireless communication control device determines whether or not the new network identification code is included in a prohibition list indicating a network identification code that should not be used, and is included in the prohibition list The wireless communication control device according to claim 4, wherein a new change request is transmitted in the case of being changed. The wireless communication control device transmits a prohibition list indicating a network identification code that should not be used together with the change request,
In response to the change request and the prohibition list, the wireless communication device determines a new network identification code not included in the prohibition list, and transmits the new network identification code to the wireless communication control device. The radio | wireless communication control apparatus as described in any one of Claims 1-3. A wireless communication system comprising the wireless communication control device according to any one of claims 1 to 6 and a wireless communication device,
The plurality of wireless communication devices have a function of changing a network identification code according to the change request,
Wireless communication system.

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