JP2013098855A - Radio communication system and radio communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable forming of a network with a plurality of radio communication devices having different radio communication schemes.SOLUTION: A first base station reads out software from a storage unit that stores software, and sends an inquiry to a second base station based on a radio scheme associated with the software. If there is no response to after inquiries are made based on all of the radio schemes stored in the storage unit, the first base station acquires software for a radio scheme that is not stored in the storage unit, from a radio signal processing device. The second base station, on receipt of an inquiry from the first base station with a radio scheme usable by the second base station, makes a response using the radio scheme.

Description

  The present invention relates to a technique for performing wireless communication corresponding to a plurality of wireless systems.

  In recent years, information collection by using a network is regarded as very important. However, in a disaster area where a disaster has occurred, there is a high possibility that communication will be disabled due to damage or failure of a network communication switch or cable. In order to recover from such an incommunicable situation, for example, a communication company needs to repair or replace an exchange or a cable, which requires a considerable amount of time. For this reason, there arises a problem that a disaster victim cannot collect information using a network after a disaster.

  However, in a disaster area, even if it is not the Internet that can collect information globally, it is very useful for collecting information if there is a local area network. Therefore, a configuration for forming a local area network with a plurality of wireless terminal station devices centering on a wireless communication base station device as described below is known.

  That is, in the radio communication base station apparatus, first configuration data indicating a condition for permitting connection to the radio communication base station apparatus, and second indicating that connection is permitted to all radio terminal station apparatuses. The configuration data is stored. Then, when the radio communication base station apparatus receives an opening instruction for instructing selection of the second configuration data from the radio terminal station apparatus, the radio communication base station apparatus reads out the second configuration data and transmits the second configuration data to the radio communication base station apparatus. This is a condition for permitting connection (for example, see Patent Document 1).

JP 2010-118861 A

However, the configuration in Patent Document 1 described above is based on the premise that each of the radio communication base station apparatus and the plurality of radio terminal station apparatuses has the same radio communication system. Therefore, for example, a wireless terminal station device having a wireless communication method different from that of the wireless communication base station device cannot be included in the local area network formed by the wireless communication base station device. In consideration of the situation of a disaster area, it is required that as many wireless communication apparatuses as possible be included in one local area network regardless of differences in wireless communication systems.
In view of the above circumstances, an object of the present invention is to provide a technique that enables a network to be formed by a plurality of wireless communication apparatuses having different wireless communication systems.

  One embodiment of the present invention provides a wireless signal processing device that stores a plurality of pieces of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and the first base station. And a second base station that performs wireless communication with the first base station, wherein the first base station corresponds to a storage unit that stores the software and the software stored in the storage unit An inquiry unit that makes an inquiry to the second base station based on the wireless method, and the second base even if the inquiry unit makes an inquiry based on all the wireless methods stored in the storage unit An acquisition unit that acquires, from the wireless signal processing device, software of a wireless method that is not stored in the storage unit when there is no response from the station, and the second base station includes: If an inquiry is received in use a radio system capable from the first base station, a wireless communication system comprising a response unit which responds with the radio system.

  One embodiment of the present invention provides a wireless signal processing device that stores a plurality of pieces of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and the first base station. And a second base station that performs wireless communication with the wireless communication system, wherein the first base station makes an inquiry to the second base station using a common wireless control signal And a determination unit that receives a response from the second base station in response to the inquiry, and determines that the wireless method used in the response is a wireless method that can be used by the second base station. The second base station is a wireless communication system including a response unit that responds using a wireless method that can be used by the own device in response to an inquiry using the common wireless control signal.

  One embodiment of the present invention provides a wireless signal processing device that stores a plurality of pieces of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and the first base station. And a second base station that performs wireless communication in a wireless communication method performed by the wireless communication system, wherein the first base station reads the software from a storage unit that stores the software, and the software An inquiry step for making an inquiry to the second base station based on the corresponding wireless method, and the first base station making the inquiry based on all the wireless methods stored in the storage unit However, if there is no response from the second base station, the acquisition step of acquiring the wireless software not stored in the storage unit from the wireless signal processing device. And a response step of responding using the wireless method when the second base station receives an inquiry from the first base station in a wireless method usable by the own device. It is.

  One embodiment of the present invention provides a wireless signal processing device that stores a plurality of pieces of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and the first base station. And a second base station that performs wireless communication in a wireless communication method performed by the wireless communication system, wherein the first base station uses a common wireless control signal to communicate with the second base station. An inquiry step for making an inquiry, and the first base station receives a response from the second base station in response to the inquiry, and the second base station can use the radio system used for the response A determination step that determines that the wireless device is a wireless method, and a response step in which the second base station responds by using a wireless method that can be used by itself in response to an inquiry using the common wireless control signal; Have It is a line communication method.

  According to the present invention, a network can be formed by a plurality of wireless communication apparatuses having different wireless communication systems.

It is a figure which shows one structural example of the radio | wireless communications system formed in the 1st Embodiment of this invention. It is a sequence diagram which shows the operation example which each apparatus of a radio | wireless communications system performs in order to form the local area network in 1st Embodiment. It is a sequence diagram which shows the operation example which each apparatus of a radio | wireless communications system performs in order to form the local area network in 1st Embodiment. It is a sequence diagram which shows the operation example which each apparatus of a radio | wireless communications system performs in order to form the local area network in 1st Embodiment. It is a figure which shows the structural example of the network control apparatus in 1st Embodiment. It is a figure which shows the structural example of the host wireless communication apparatus and client wireless communication apparatus in 1st Embodiment. It is a figure which shows the example of a process sequence which the network control apparatus in 1st Embodiment performs. It is a figure which shows the example of a process sequence which the host radio | wireless communication apparatus in 1st Embodiment performs. It is a figure which shows the example of a process sequence which the client radio | wireless communication apparatus in 1st Embodiment performs. It is a figure which shows one structural example of the radio | wireless communications system formed in the 2nd Embodiment of this invention. It is a sequence diagram which shows the operation example which each apparatus of a radio | wireless communications system performs in order to form the local area network in 2nd Embodiment. It is a sequence diagram which shows the operation example which each apparatus of a radio | wireless communications system performs in order to form the local area network in 2nd Embodiment. It is a figure which shows the structural example of the network control apparatus in 2nd Embodiment. It is a figure which shows the structural example of the host radio | wireless communication apparatus in 2nd Embodiment. It is a figure which shows the structural example of the client radio | wireless communication apparatus in 2nd Embodiment. It is a figure which shows the example of a process sequence which the network control apparatus in 2nd Embodiment performs. It is a figure which shows the example of a process sequence which the host radio | wireless communication apparatus in 2nd Embodiment performs. It is a figure which shows the example of a process sequence which the client radio | wireless communication apparatus in 2nd Embodiment performs. It is a figure which shows one structural example of the radio | wireless communications system formed in a 1st modification. It is a figure which shows one structural example of the radio | wireless communications system formed in a 2nd modification. It is a figure which shows one structural example of the radio | wireless communications system formed in a 3rd modification.

<First Embodiment>
[Configuration example of wireless communication system]
FIG. 1 shows a configuration example of a wireless communication system formed in the first embodiment. In this figure, houses 10-1, 10-2 and 10-3 are shown. These houses 10-1, 10-2 and 10-3 are assumed to be built in a stricken area where, for example, an earthquake or the like has occurred. In addition, the existing facilities for connecting to the Internet due to the disaster are damaged or broken down, so that the Internet connection using the existing facilities is impossible in any of the houses 10-1, 10-2 and 10-3. Assume the situation.

  The house 10-1 includes a network control device 100 and a host wireless communication device 200. The network control device 100 is a device for constructing a local area network with wireless communication devices in the surrounding area. This network control device 100 is not provided in the house 10-1 before the occurrence of a disaster. The network control device 100 is provided in the house 10-1 in response to the fact that an existing facility cannot use the Internet environment due to a disaster.

  The host wireless communication device 200 is a wireless terminal that has been used for Internet connection by a user using an existing facility in the house 10-1 before the occurrence of a disaster. In addition, the host wireless communication device 200 is compatible with software wireless, which allows the wireless communication method to be switched while maintaining the hardware configuration. The host wireless communication device 200 is connected to the network control device 100 to function as a host for constructing a local area network composed of itself and peripheral client wireless communication devices 300.

  The house 10-2 includes a first client (CL) wireless communication device 300-1. The first client wireless communication apparatus 300-1 is used for Internet connection by a user using an existing facility in the house 10-2 before the occurrence of a disaster. This first client wireless communication apparatus 300-1 also supports software defined radio. In addition, the first client wireless communication device 300-1 functions as one of client terminals in the local area network.

  Moreover, the second client wireless communication device 300-2 is provided in the house 10-3. The second client wireless communication device 300-2 is used for Internet connection by a user using an existing facility in the house 10-3 before the occurrence of a disaster. The second client wireless communication device 300-2 also supports software defined radio. In addition, the second client wireless communication device 300-2 functions as one of client terminals in the local area network.

  A wireless LAN (Local Area Network) access point or the like is assumed as an example of a device that embodies the host wireless communication device 200, the first client wireless communication device 300-1, and the second client wireless communication device 300-2. be able to.

The information processing terminal 400 in the house 10-3 is a terminal connected to the second client wireless communication device 300-2 as a wireless LAN access point in the house. The information processing terminal 400 can be assumed to be a personal computer, for example.
In the following description, when referring to the first client wireless communication device 300-1 and the second client wireless communication device 300-2 without particular distinction, they are described as “client wireless communication device 300”.

  The network control device 100 stores wireless communication software corresponding to different wireless communication methods. As an example, here, wireless communication software corresponding to each of the wireless communication systems A, B, and C is stored. Each of the host wireless communication device 200 and the client wireless communication device 300 can execute communication by the wireless communication method of the wireless communication software loaded from the network control device 100.

  In the first embodiment, it is preferable that the device as the host wireless communication device 200 and the device as the client wireless communication device 300 have a common configuration in connection with the formation of the local area network. Thereby, if an arbitrary device is connected to the network control device 100 in the disaster area, the device can be caused to function as the host wireless communication device 200. In addition, other wireless communication devices can function as the client wireless communication device 300.

  In FIG. 1, the following example is shown as a configuration of a local area network formed by the network control device 100. That is, the host wireless communication device 200 is configured to execute wireless communication by the wireless communication method B. Further, the first client wireless communication device 300-1 is configured to execute wireless communication using the wireless communication method B and the wireless communication method A. The second client wireless communication device 300-2 is configured to execute wireless communication by the wireless communication method A.

  As described above, since the wireless communication method is set in each of the host wireless communication device 200 and the client wireless communication device 300, the wireless communication devices are connected as follows. That is, the host wireless communication device 200 and the first client wireless communication device 300-1 are connected by the wireless communication method B. The first client wireless communication device 300-1 and the second client wireless communication device 300-2 are connected by the wireless communication method A. In addition, the host wireless communication device 200 and the second client wireless communication device 300-2 are connected via a relay of the first client wireless communication device 300-1.

  As described above, in FIG. 1, a local area network capable of mutual communication between wireless communication devices is formed regardless of the presence of wireless communication devices with different wireless communication methods. Although it is assumed that there are more client wireless communication devices 300, here, for convenience of explanation, the first client wireless communication device 300-1 and the second client wireless communication device 300-2 are provided. There are two.

[Example of operation for forming a local area network]
Next, referring to the sequence diagrams of FIG. 2 to FIG. 4, the network control device 100, the host wireless communication device 200, and the client wireless communication device 300 execute to form the local area network shown in FIG. A specific example of the operation will be described.
In the description here, it is assumed that the wireless communication method B is set in the first client wireless communication device 300-1 by presetting. In addition, it is assumed that the wireless communication method A is set in the second client wireless communication device 300-2 by presetting.

  First, as shown in FIG. 2, the network control device 100 executes load control for causing the host wireless communication device 200 to load wireless communication software of the wireless communication method C (step S1). In response to this, the host wireless communication apparatus 200 loaded with the wireless communication software can execute wireless communication by the wireless communication method C.

  Next, the network control device 100 instructs the host wireless communication device 200 to execute an inquiry to the client wireless communication device 300 using the wireless communication method C (step S2). In response to this instruction, the host wireless communication device 200 transmits an inquiry by broadcast using the wireless communication method C (step S3).

  At this time, the first client wireless communication device 300-1 can only perform wireless communication compatible with the wireless communication method B, and the second client wireless communication device 300-2 can only perform wireless communication compatible with the wireless communication method C. Is possible. Therefore, it is impossible to receive and respond to an inquiry by the wireless communication system C.

  Thereby, the host wireless communication apparatus 200 detects a timeout without receiving a response after a predetermined time has elapsed from the inquiry transmission timing in step S3 (step S4). In response to the detection of the timeout, the host wireless communication device 200 notifies the network control device 100 that there is no response to the inquiry by the wireless communication method C (step S5).

  In response to the notification, the network control device 100 deletes the wireless communication software corresponding to the wireless communication method C loaded in the previous step S2 from the host wireless communication device 200 (step S6). Next, the network control device 100 executes load control for causing the host wireless communication device 200 to load wireless communication software of the wireless communication method C (step S7). In response to this, the host wireless communication device 200 can execute wireless communication by the wireless communication method B instead of the wireless communication method C.

  Therefore, the network control device 100 instructs the host wireless communication device 200 to execute an inquiry to the client wireless communication device 300 using the wireless communication method B (step S8). In response to this instruction, the host wireless communication device 200 transmits an inquiry by broadcast using the wireless communication method B (step S9).

  The inquiry transmitted by the wireless communication method B is received by the first client wireless communication device 300-1 corresponding to the same wireless communication method B. The first client wireless communication device 300-1 transmits a response to the received inquiry to the host wireless communication device 200 by the wireless communication method B (step S10). In response to the transmission / reception of the response, the host wireless communication device 200 and the first client wireless communication device 300-1 establish a connection by the wireless communication method B. Then, the host wireless communication device 200 notifies the network control device 100 that the first client wireless communication device 300-1 has responded to the inquiry by the wireless communication method B as a response result to the inquiry (step S11).

  In response to the reception of the notification in step S11, the network control apparatus 100 sends an inquiry instruction to the first wireless communication apparatus 300-1 by the wireless communication method B to the host wireless communication apparatus 200 as shown in FIG. It transmits to (step S12). The host wireless communication device 200 performs relay so that the received inquiry instruction is transferred to the first client wireless communication device 300-1 (step S13).

  The first client wireless communication apparatus 300-1 that has received the inquiry instruction transmits the inquiry by broadcast using the wireless communication method B (step S14). As described above, the purpose of causing the first client wireless communication device 300-1 to execute the inquiry by the wireless communication method B is as follows. That is, another client wireless communication device that is not located within the communication distance of the host wireless communication device 200 but is compatible with the wireless communication method B located within the communication distance of the first client wireless communication device 300-1. This is because 300 is searched.

  In this case, the second client wireless communication device 300-2 can only perform wireless communication corresponding to the wireless communication method A. For this reason, it is impossible to respond to the inquiry by the wireless communication method B. Therefore, the first client wireless communication device 300-1 detects a timeout without receiving a response after a predetermined time has elapsed from the inquiry transmission timing in step S14 (step S15).

  In response to the detection of the timeout, the first client wireless communication device 300-1 notifies the network control device 100 by the wireless communication method B that there is no response to the inquiry by the wireless communication method B (step S16). . At this time, the first client wireless communication device 300-1 relays the notification so as to be transferred to the network control device 100 (step S17).

  The network control device 100 that has received the notification executes load control for loading the wireless communication software of the wireless communication method A to the first client wireless communication device 300-1 (step S18). This load control is performed via the relay of the host wireless communication device 200 (step S19). The first client wireless communication apparatus 300-1 can perform wireless communication by the wireless communication method A together with the wireless communication method B by loading the wireless communication software of the wireless communication method A according to the load control.

  Next, the network control apparatus 100 transmits an inquiry instruction to the first client wireless communication apparatus 300-1 by the wireless communication method A to the host wireless communication apparatus 200 (step S20). The host wireless communication device 200 relays the received instruction so as to be transferred to the first client wireless communication device 300-1 (step S21).

The first client wireless communication device 300-1 that has received the above instruction transmits an inquiry by broadcast using the wireless communication method A (step S22).
The inquiry by the wireless communication method A is received by the second client wireless communication device 300-2 corresponding to the same wireless communication method A. The second client wireless communication apparatus 300-2 transmits a response to the inquiry to the first client wireless communication apparatus 300-1 as the inquiry source as shown in FIG. 4 (step S23). In response to the transmission / reception of the response, the host wireless communication device 200 and the first client wireless communication device 300-1 establish a connection by the wireless communication method B.

  Further, the first client wireless communication apparatus 300-1 notifies the network control apparatus 100 that the second client wireless communication apparatus 300-2 has responded to the inquiry by the wireless communication method A as a response result to the inquiry ( Step S24). The first client wireless communication device 300-1 transmits this notification to the host wireless communication device 200 by the wireless communication method B. The host wireless communication device 200 relays the received notification so as to be transferred to the network control device 100 (step S25).

  According to the procedure described above, the network control device 100 loads all the wireless communication software stored in the network controller 100 corresponding to each of the wireless communication systems A, B, and C to search for a terminal. Become. As a result, all of the wireless communication devices corresponding to any one of the wireless communication systems A, B, and C in the vicinity belong to the local area network as the client wireless communication device 300.

  Therefore, the network control device 100 reads the information source stored in itself (step S26). The information source here is information to be provided to the victims. Then, the network control device 100 transmits an information source transfer instruction together with the information source to the host wireless communication device 200 (step S27).

  The host wireless communication device 200 stores the information source received together with the information source transfer instruction in step S27. In addition, in response to the received information source transmission instruction, the host wireless communication apparatus 200 transmits an information source transfer instruction by broadcast using the wireless communication method B (step S28). At this time, the host wireless communication apparatus 200 also transmits the information source together with the information source transfer instruction.

  The information source transfer instruction transmitted by the wireless communication method B in step S28 is received by the first client wireless communication device 300-1 corresponding to the same wireless communication method B. The first client wireless communication apparatus 300-1 stores the received information source together with the information source transfer instruction in step S28. In addition, the first client wireless communication device 300-1 transmits an information source transfer instruction by broadcast using the wireless communication systems A and B in accordance with the received information source transmission instruction (step S29). In other words, the information source transfer instruction is transmitted for each wireless communication system that the self supports. Also at this time, the information source is transmitted together with the information source transfer instruction.

  The information source transfer instruction transmitted by the wireless communication method A in step S29 is received by the second client wireless communication device 300-2. Although not shown, the second client wireless communication device 300-2 transmits an information source in response to the reception of the information source transfer instruction in the same manner as the first client wireless communication device 300-1. In addition, an information source transfer instruction is transmitted by broadcast using the wireless communication system A that it supports. Thus, in the present embodiment, information sources can be spread in a chain manner between the client wireless communication devices 300 in the local area network.

[Configuration example of network control unit]
FIG. 5 shows a configuration example of the network control apparatus 100 in the first embodiment. The network control apparatus 100 shown in this figure includes a communication unit 101, a storage unit 102, a load control unit 103, an inquiry instruction unit (first inquiry instruction unit, second inquiry instruction unit) 104, and an information source processing unit 105. .

  The communication unit 101 is a part that communicates with the host wireless communication device. The communication unit 101 is a part that performs communication using a predetermined wireless communication method that is fixedly set according to, for example, hardware specifications. Here, the communication unit 101 is assumed to be wired, but may be wireless. Further, the wireless communication method supported by the communication unit 101 is not particularly limited.

  The storage unit 102 stores a plurality of wireless communication software each corresponding to a different wireless communication method. Here, as shown in the figure, an example is shown in which wireless communication software 121 corresponding to wireless communication method A, wireless communication software 122 corresponding to wireless communication method B, and wireless communication software 123 corresponding to wireless communication method C are stored. Yes. In addition, the storage unit 102 stores an information source 124. As hardware corresponding to the storage unit 102, for example, a nonvolatile semiconductor storage device such as a flash memory or a hard disk drive can be assumed.

  The load control unit 103 performs load control for loading the wireless communication software 121 to 123 stored in the storage unit 102 onto the host wireless communication device 200 or the client wireless communication device 300. At the time of this load control, the load control unit 103 transmits data of the wireless communication software to be loaded to the host wireless communication device 200 or the client wireless communication device 300 and instructs the loading.

  The inquiry instruction unit 104 (first inquiry instruction unit) instructs the host wireless communication apparatus 200 to make an inquiry (first inquiry) to the client wireless communication apparatus 300. If there is no response to the current first inquiry, the host wireless communication apparatus 200 loaded with wireless communication software of a wireless communication method different from that used for the current first inquiry is sent to the next first inquiry. Directs inquiries.

  Further, the inquiry instruction unit 104 (second inquiry instruction unit), when there is the first client wireless communication device 300-1 that responds to the first inquiry, the first client wireless communication device 300- 1 is instructed to send an inquiry (second inquiry) to the second client wireless communication apparatus 300-2. If there is no response to the second inquiry, the first client wireless communication apparatus 300-1 loaded with wireless communication software of a wireless communication method different from that used for the second inquiry is sent to the first client wireless communication apparatus 300-1. Of the second inquiry.

  If there is no response to the first inquiry, the load control unit 103 causes the host wireless communication apparatus 200 to load wireless communication software corresponding to a wireless communication method different from that for the first inquiry. As a result, the wireless communication method supported by the host wireless communication apparatus 200 is changed. In response to this, the inquiry instruction unit 104 instructs the next first inquiry by the wireless communication method after the change.

  Further, when there is no response to the second inquiry, the load control unit 103 transmits the second inquiry to the client wireless communication apparatus 300 that is the instruction target that has executed the second inquiry. Load wireless communication software of a different wireless communication method. As a result, a wireless communication method supported by the client wireless communication apparatus 300 to be processed is added. In response to this, the inquiry instructing unit 104 instructs the second inquiry again with the added wireless communication method.

  The information source processing unit 105 issues an information source transfer instruction as information source processing. That is, the information source 124 stored in the storage unit 102 is read, and an information source transfer instruction is transmitted together with the information source 124 from the communication unit 101 to the host wireless communication apparatus 200. The information source processing unit 105 also executes control for storing the data of the information source 124 received by the communication unit 101 in the storage unit 102 as information source processing.

[Configuration example of wireless communication device]
FIG. 6 shows a configuration example of the host wireless communication device 200 and the client wireless communication device 300 in the first embodiment.
First, the configuration of the host wireless communication apparatus 200 will be described. The host wireless communication apparatus 200 includes a communication unit (second communication unit) 201, a load unit (first load unit) 202, a wireless communication processing unit (first wireless communication processing unit) 203, and an inquiry control unit (first Inquiry control unit) 204, response control unit 205, and information source processing unit 206.

The communication unit 201 is a part that communicates with the network control apparatus 100. The load unit 202 loads the wireless communication software transferred from the network control device 100 according to the load control of the load control unit 103.
The wireless communication processing unit 203 executes wireless communication processing based on the wireless communication software loaded by the load unit 202.

  The inquiry control unit 204 causes the wireless communication processing unit 203 to transmit an inquiry (first inquiry) to the client wireless communication apparatus 300 in response to the inquiry instruction from the inquiry instruction unit 104 of the network control apparatus 100. Further, the inquiry control unit 204 establishes a connection with the first client wireless communication device 300-1 that has made a response to the first inquiry by the wireless communication method in which the response has been received.

  The response control unit 205 will be described later as the response control unit 305 of the client wireless communication apparatus 300. In the case of the host wireless communication device 200, no inquiry is received from the client wireless communication device 300. Therefore, the response control unit 205 can be omitted from the host wireless communication apparatus 200 if the client wireless communication apparatus 300 does not necessarily have a common configuration.

The information source processing unit 206 executes processing according to the information source transfer instruction from the network control device 100 received by the communication unit 101.
Next, the client wireless communication apparatus 300 will be described with reference to FIG. The client wireless communication apparatus 300 includes a communication unit 301, a load unit (second load unit) 302, a wireless communication processing unit (second wireless communication processing unit) 303, an inquiry control unit (second inquiry control unit) 304, and A response control unit 305 is provided.

  The inquiry control unit 304 causes the second wireless communication processing unit to transmit a second inquiry in response to an instruction (second inquiry) relayed by the host wireless communication apparatus 200. Further, the inquiry control unit 304 establishes a connection with the second client wireless communication apparatus 300-2 that has made a response to the second inquiry by the wireless communication method in which the response has been received.

  When an inquiry from the host wireless communication apparatus 200 or an inquiry from another client wireless communication apparatus 300 is transmitted, the inquiry is received by the wireless communication processing unit 303. The response control unit 305 executes control for transmitting a response to the inquiry source by the wireless communication processing unit 303 in response to the reception of the inquiry.

The information source processing unit 306 executes processing according to an information source transfer instruction from the host wireless communication device 200 or another client wireless communication device 300 received by the wireless communication processing unit 203.
The load unit 302 and the wireless communication processing unit 303 may have the same configuration as the load unit 202 and the wireless communication processing unit 203 described above.
In the case of the client wireless communication device 300, it is not necessary to connect the network control device 100 to the communication unit 301. Therefore, the communication unit 301 can be omitted from the client wireless communication device 300 if it is not always necessary to adopt a common configuration with the host wireless communication device 200.

[Example of processing procedure of network controller]
The flowchart in FIG. 7 illustrates an example of a processing procedure executed by the network control device 100 according to the first embodiment. The processing shown in this figure can be regarded as being appropriately executed by any of the functional units of the network control apparatus 100 shown in FIG.
First, the load control unit 103 selects one wireless communication software for the host wireless communication apparatus 200 and executes load control (step S101). This load control corresponds to step S1 in FIG.

  Next, the inquiry instruction unit 104 issues an inquiry (first inquiry) instruction to the host wireless communication apparatus 200 (step S102). This inquiry instruction corresponds to step S2 in correspondence with FIG. Next, the inquiry instruction unit 104 determines whether or not a notification that there is a response to the inquiry according to the inquiry instruction has been received (step S103).

  When it is determined that the notification is not received because a timeout has been detected as exemplified in step S4 of FIG. 2 (step S103—NO), the load control unit 103 performs the step S101 from the host wireless communication device 200 in the previous step S101. Control for deleting the loaded wireless communication software is executed (step S104). In addition, load control for causing the host wireless communication apparatus 200 to load wireless communication software of a wireless communication method different from that in step S101 is executed (step S105). Then, by returning to step S102, the host wireless communication apparatus 200 is made to execute again the inquiry by the wireless communication method different from the previous inquiry. The second and subsequent steps S102 correspond to step S8 in correspondence with FIG.

  Then, when a response notification is received (step S103—YES), the inquiry instruction unit 104 proceeds to the following process. That is, the inquiry instruction unit 104 transmits an inquiry instruction (second inquiry instruction) to the other client wireless communication apparatus 300 to the first client wireless communication apparatus 300-1 that has responded to the inquiry in Step S102 ( Step S106). This inquiry instruction is the first inquiry instruction for the first time, and corresponds to step S12 in correspondence with FIG. In response to this, the first client wireless communication device 300-1 makes an inquiry to another client wireless communication device 300.

  Next, the inquiry instruction unit 104 determines whether or not a notification indicating that there is a response to the inquiry made as described above is received (step S107). Here, when a timeout is detected as in step S15 of FIG. 3 and it is determined that the notification with the response is not received (step S107—NO), the load control unit 103 executes the following processing. In other words, the load control unit 103 executes load control for causing the first client wireless communication device 300-1 to load wireless communication software of a wireless communication method different from that for the inquiry according to the inquiry instruction this time (step). S108). Then, by returning to step S106, the inquiry instruction unit 104 instructs an inquiry by the wireless communication method of the wireless communication software loaded in step S108. When there are a large number of client wireless communication devices 300 in the vicinity, there may be a plurality of first client wireless communication devices 300-1 that respond in response to the inquiry instruction in step S102. In this case, the processing of steps S106 to S108 is performed for each of the plurality of first client wireless communication devices 300-1.

  When the notification that there is another client wireless communication device 300 that has responded to the inquiry from the first client wireless communication device 300-1 is received, the information source processing unit 105 receives the information source from the storage unit 102. 124 is read (step S109). Then, an information source transfer instruction is transmitted together with the information source 124 to the first client wireless communication apparatus 300-1 (step S110).

[Processing procedure example of host wireless communication device]
With reference to the flowchart of FIG. 8, an example of a processing procedure executed by the host wireless communication apparatus 200 will be described. The processing shown in this figure can be regarded as being appropriately executed by a predetermined functional unit in the host wireless communication apparatus 200 shown in FIG.

  First, the load unit 202 determines whether or not the load control for the self (host wireless communication device 200) by the load control unit 103 of the network control device 100 has been received (step S201). When it is determined that the load control has been received (step S201—YES), the load unit 202 loads the wireless communication software transmitted together with the load control (step S202). As a result, the wireless communication processing unit 203 executes wireless communication according to the wireless communication method of the wireless communication software loaded in step S202.

  In FIG. 2, prior to the load control, the wireless communication software loaded so far is deleted. This deletion of the wireless communication software may be executed prior to loading of the wireless communication software in step S202. It is also conceivable that the wireless communication software is left as it is without being deleted.

  When the load control is not received (step S201-NO), or when the wireless communication software is loaded in step S202, the inquiry control unit 204 performs the following processing. That is, the inquiry control unit 204 determines whether or not an instruction for an inquiry (first inquiry) to itself (host wireless communication apparatus 200) has been received (step S203). This inquiry instruction is transmitted from the network control apparatus 100 and received by the communication unit 101.

  In response to receiving the inquiry instruction (step S203—YES), the inquiry control unit 204 transmits an inquiry (first inquiry) by broadcast from the wireless communication processing unit 203 (step S204). Then, the inquiry control unit 204 notifies the response result to the network control device 100 via the communication unit 101 (step S205).

  When the inquiry instruction is not received (step S203—NO), or the response result is notified at step S205, the inquiry control unit 204 performs the following processing. That is, it is determined whether or not an inquiry instruction (second inquiry instruction) for the client wireless communication apparatus 300 has been received from the network control apparatus 100 (step S206). When the inquiry instruction is received (step S206—YES), the inquiry control unit 204 relays the inquiry instruction (step S207).

  When the inquiry instruction is not received (NO in step S206), or when the inquiry instruction is relayed in step S207, the load unit 202 performs the following process. That is, it is determined whether or not the load control for the client wireless communication apparatus 300 is received from the network control apparatus 100 (step S208). When this load control is received (step S208—YES), the load unit 202 relays this load control (step S209). That is, the load unit 202 causes the wireless communication processing unit 203 to transfer this load control to the client wireless communication apparatus 300 as the transmission destination.

  When the load control is not received (step S208-NO) or when the load control at step S209 is relayed, the information source processing unit 206 performs the following processing. That is, the information source processing unit 206 determines whether or not the information source transfer instruction from the network control apparatus 100 is received by the communication unit 101 (step S210).

  If the information source transfer instruction is not received (step S210—NO), the process returns to step S102. On the other hand, when the information source transfer instruction is received (step S210-YES), the information source processing unit 206 stores the information source transmitted together with the information source transfer instruction (step S211). At the same time, the wireless communication processing unit 203 transmits an information source transfer instruction by broadcasting (step S212).

[Processing procedure example of client wireless communication device]
FIG. 9 shows an example of a processing procedure executed by the client wireless communication apparatus 300 in the first embodiment. The processing shown in this figure can be regarded as being appropriately executed by a predetermined functional unit in the client wireless communication apparatus 300 shown in FIG.

  First, the load unit 302 determines whether or not load control for itself is received by the wireless communication processing unit 303 (step S301). When this load control is received (step S301-YES), the load unit 302 loads the wireless communication software transmitted together with the load control (step S302). As a result, the wireless communication processing unit 303 can execute wireless communication using the wireless communication method of the wireless communication software loaded so far and the wireless communication method of the wireless communication software newly loaded this time. When the load control is not received (step S301-NO), the step S302 is skipped.

  Next, the inquiry control unit 304 determines whether an inquiry from the host wireless communication device 200 or another client wireless communication device 300 has been received by the wireless communication processing unit 303 (step S303). When this inquiry is received (YES in step S303), the inquiry control unit 304 causes the wireless communication processing unit 303 to transmit a response to the inquiring host wireless communication device 200 or other client wireless communication device 300 (step S304). ). If the inquiry is not received (step S303-NO), step S304 is skipped.

  Next, the information source processing unit 306 determines whether or not an information source transfer instruction from the host wireless communication device 200 or another client wireless communication device 300 has been received by the wireless communication processing unit 303 (step S305). When the information source transfer instruction is received (step S305—YES), the information source processing unit 306 stores the information source received together with the information source transfer instruction (step S306). At the same time, the information source processing unit 306 causes the wireless communication processing unit 303 to transmit an information source transfer instruction by broadcasting (step S307). At this time, an information source transfer instruction is transmitted by a wireless communication method corresponding to all of the loaded wireless communication software. After this process, the process returns to step S301. If the information source transfer instruction is not received (step S305-NO), the process skips steps S306 and S307 and returns to step S301.

<Second Embodiment>
[Configuration example of wireless communication system]
FIG. 10 shows a configuration example of a wireless communication system formed in the second embodiment. The host wireless communication apparatus 200 in the first embodiment is assumed to have been used for network use before the disaster in the house 10-1. In contrast, the host wireless communication device 200A in the second embodiment is assumed to be installed together with the network control device 100A after a disaster. Also in the second embodiment, the host wireless communication device 200A and the network control device 100A are connected to each other so as to be able to communicate with each other, for example, by wire.

  In the second embodiment, each of the houses 10-1, 10-2, and 10-3 includes a first client wireless communication device 300A-1, a second client wireless communication device 300A-2, and a third client wireless communication device 300A. -3. These client wireless communication devices 300A are wireless terminals used for Internet connection using existing facilities before a disaster, for example. Thus, in the second embodiment, each wireless terminal provided in each house functions as the client wireless communication device 300A.

  In this figure, it is assumed that the host wireless communication device 200A in the second embodiment is capable of performing communication with software communication wireless communication systems A and B. The host wireless communication device 200A is also compatible with the common wireless communication method. The common wireless communication method is a wireless communication method provided in common in each of the host wireless communication device 200A and the client wireless communication device 300A. This common wireless communication method is fixed according to hardware specifications, not software wireless, and for example, a predetermined analog method is adopted.

In addition, the first client wireless communication device 300A-1 in the house 10-1 is not loaded with wireless communication software, and can perform only wireless communication using a common wireless communication method, for example. The second client wireless communication device 300A-2 in the house 10-2 is capable of wireless communication using the wireless communication method B according to the load of the wireless communication software and wireless communication using the common wireless communication method. The third client wireless communication device 300A-3 in the house 10-3 is capable of wireless communication using the wireless communication method A and wireless communication using the common wireless communication method according to the load of the wireless communication software. It is assumed that the wireless communication method supported by the client wireless communication device 300A has been set before the occurrence of a disaster.
Also, according to the above description, it can be seen that the common wireless communication method is provided in common in each of the host wireless communication device 200A and the client wireless communication device 300A. This wireless communication method is implemented in each wireless communication device in consideration of, for example, the occurrence of a disaster.

  In the example of FIG. 10, a local area network is formed as follows. That is, the host wireless communication device 200A and the first client wireless communication device 300A-1 are connected by a common wireless communication method. The host wireless communication device 200A and the second client wireless communication device 300A-2 are connected by the wireless communication method B. The host wireless communication device 200A and the third client wireless communication device 300A-3 are connected by the wireless communication method A. That is, in the second embodiment, the host wireless communication device 200A is the center. A local area network is formed in which a plurality of client wireless communication devices 300A having different wireless communication systems are connected in a star shape.

[Example of operation for forming a local area network]
Next, referring to the sequence diagrams of FIGS. 11 and 12, the network control device 100A, the host wireless communication device 200A, and the client wireless communication device 300A execute the local area network shown in FIG. A specific example of the operation will be described.

  First, as shown in FIG. 11, the network control device 100A instructs the host wireless communication device 200A to make an inquiry using the common wireless communication method (step S51). In response to this, the host wireless communication device 200A transmits an inquiry by broadcast using the common wireless communication method (step S52).

  As described above, the host wireless communication apparatus 200A and the client wireless communication apparatus 300A have a common wireless communication system. Accordingly, the inquiry in step S52 is received by each of the first client wireless communication device 300A-1, the second client wireless communication device 300A-2, and the third client wireless communication device 300A-3.

  First, the third client radio communication apparatus 300A-3 transmits a response to the host radio communication apparatus 200A by the software radio radio communication system A that the third client radio communication apparatus 300A-3 receives in response to the inquiry in step S52 (see FIG. Step S53). In response to reception of this response, the host wireless communication device 200A establishes a connection with the third client wireless communication device 300A-3 by the wireless communication method A (step S54). That is, the host wireless communication device 200A establishes a connection with the client wireless communication device 300A that is the response transmission source by the wireless communication method in which the response is received.

  Further, the host wireless communication device 200A notifies the network control device 100A that the response from the third client wireless communication device 300A-3 has been transmitted by the wireless communication method A (step S55).

  Also, the second client wireless communication device 300A-2 transmits a response to the host wireless communication device 200A by the software defined wireless wireless communication method B corresponding to the second client wireless communication device 300A-2 in response to the inquiry received in the previous step S52. (Step S56). In response to reception of this response, the host wireless communication device 200A establishes a connection with the second client wireless communication device 300A-2 by the wireless communication method B (step S57). Further, the host wireless communication device 200A notifies the network control device 100A that the response from the second client wireless communication device 300A-2 has been transmitted by the wireless communication method B (step S58).

  Further, as shown in FIG. 12, the first client wireless communication apparatus 300A-1 responds to the host wireless communication apparatus 200A by the common wireless communication method supported by itself in response to the inquiry received in the previous step S52. A response is transmitted (step S59). In response to receiving this response, the host wireless communication device 200A establishes a connection with the first client wireless communication device 300A-1 by the common wireless communication method (step S60). Further, the host wireless communication device 200A notifies the network control device 100A that the response from the first client wireless communication device 300A-1 has been transmitted by the common wireless communication method (step S61).

With the above operation, a connection between each of the plurality of client wireless communication devices 300A and the host wireless communication device 200A is established, and a star-type local area network centering on the host wireless communication device 200A is formed.
Then, in response to the formation of the local area network, the network control device 100A reads the information source (step S62). Then, the network control device 100A transmits an information source transfer instruction to the host wireless communication device 200A together with the information source (step S63).

  In response to receiving the information source transfer instruction, the host wireless communication device 200A transmits an information source by unicast to each client wireless communication device 300A that is connected to itself. That is, the host wireless communication device 200A transmits the information source by designating the third client wireless communication device 300A-3 as a destination by unicast (step S64). In addition, the host wireless communication device 200A transmits the information source by designating the second client wireless communication device 300A-2 as a destination by unicast (step S65). The host wireless communication device 200A transmits the information source by designating the first client wireless communication device 300A-1 as a destination by unicast (step S66).

[Configuration example of network control unit]
FIG. 13 shows a configuration example of the network control apparatus 100A in the second embodiment. In these functional parts, the same parts as those in FIG.
The network control apparatus 100A includes a communication unit 101, a storage unit 102, an inquiry instruction unit 104A, and an information source processing unit 105.

  As shown in step S51 of FIG. 11, the inquiry instruction unit 104A designates a common wireless communication method as a wireless communication method for sending an inquiry when making an inquiry instruction to the host wireless communication device 200A.

  In addition, the host wireless communication device 200A in the second embodiment is configured to be capable of wireless communication corresponding to each of the wireless communication systems A, B, and C as software wireless. Accordingly, it is not necessary for the storage unit 102 in the second embodiment to load the wireless communication software corresponding to the wireless communication methods A, B, and C. Accordingly, the wireless communication software corresponding to each of the wireless communication systems A, B, and C is not stored in the storage unit 102 of FIG. The load control unit 103 is also omitted.

[Configuration example of host wireless communication device]
FIG. 14 shows a configuration example of the host wireless communication apparatus 200A in the second embodiment. In these functional units, the same parts as those in FIG.

The host wireless communication device 200 </ b> A includes a communication unit 201, a wireless communication processing unit 203, an presence control unit 204 </ b> A, an information source processing unit 206 </ b> A, and a common method compatible wireless communication unit (first common method compatible wireless communication unit) 207.
The common method compatible wireless communication unit 207 is a part that fixedly executes communication corresponding to the common wireless communication method.

  In response to the inquiry instruction from the network control device 100A, the inquiry control unit 204A transmits an inquiry to the client wireless communication device 300A by the common method compatible wireless communication unit 207, and the response to the inquiry is transmitted by the client wireless communication device 300A. And a wireless communication method in which responses from these client wireless communication devices are received.

  The information source processing unit 206A transmits an information source in response to an information source transfer instruction from the network control apparatus 100A. At this time, the information source processing unit 206A causes the wireless communication processing unit 203 to transmit the information source to the client wireless communication device 300A that is connected by the software wireless communication method. In addition, the common wireless communication unit 207 transmits an information source to the client wireless communication device 300A that is connected by the common wireless communication method.

[Configuration example of client wireless communication device]
FIG. 15 illustrates a configuration example of the client wireless communication device 300A according to the second embodiment. In these functional units, the same parts as those in FIG.

  The client wireless communication device 300A includes a wireless communication processing unit 303, a response control unit 305A, an information source processing unit 306A, and a common method compatible wireless communication unit (second common method compatible wireless communication unit) 307.

  The common system compatible wireless communication unit 307 is a part that fixedly executes communication corresponding to the common wireless communication system. Further, the response control unit 305A causes the wireless communication processing unit 303 to transmit a response to the inquiry in response to the inquiry received by the common method compatible wireless communication unit 307. That is, the response control unit 305A transmits a response by a wireless communication method using software defined radio.

  The information source processing unit 306A executes processing for storing the information source received by the common system compatible wireless communication unit 307 or the wireless communication processing unit 303.

  In FIG. 15, the host wireless communication device 200 </ b> A is connected to each of the common communication wireless communication unit 307 and the wireless communication processing unit 303. This indicates that one client wireless communication device 300A is connected to the host wireless communication device 200A by either the common wireless communication method or the software communication wireless communication method.

[Example of processing procedure of network controller]
The flowchart in FIG. 16 illustrates an example of a processing procedure executed by the network control apparatus 100A according to the second embodiment. The processing shown in this figure can be regarded as being appropriately executed by any of the functional units in the network control apparatus 100A shown in FIG.

  First, the inquiry control unit 104A instructs the host wireless communication device 200A to make an inquiry to the client wireless communication device 300A using the common wireless communication method (step S401).

  The host wireless communication device 200A transmits an inquiry in response to this instruction, and transmits a response result from the client wireless communication device 300A to the inquiry to the network control device 100A. The inquiry control unit 104A receives the response result transmitted from the host wireless communication apparatus 200A as described above (step S402).

  The reception of the response result means that a local area network has been formed. Therefore, the network control device 100A reads the information source 124 from the storage unit 102 (step S403), and transmits an information source transfer instruction to the host wireless communication device 200A (step S404).

[Processing procedure example of host wireless communication device]
FIG. 17 shows an example of a processing procedure executed by the host wireless communication apparatus 200A in the second embodiment. The processing shown in this figure can be regarded as being executed by any of the functional units in the host wireless communication apparatus 200A shown in FIG.

  First, the inquiry control unit 204A determines whether an inquiry instruction has been received from the network control apparatus 100A (step S501). When an inquiry instruction is received (step S501—YES), the inquiry control unit 204A transmits an inquiry by broadcast from the common method compatible wireless communication unit 207 (step S502). That is, this inquiry is transmitted by the common wireless communication method. If an inquiry instruction has not been received (step S501—NO), step S502 is skipped.

  Next, the inquiry control unit 204A determines whether or not a response to the inquiry in step S502 has been received (step S503). When the response is received (step S503—YES), the inquiry control unit 204A performs processing for establishing a connection with each of the response source client wireless communication devices 300A by the wireless communication method in which the response is received. Execute (Step S504). Further, the inquiry control unit 204A notifies the network control device 100A of a response result reflecting the content of the response received in step S503 (step S505). If no response has been received, steps S504 and S505 are skipped.

  Next, the information source processing unit 206A determines whether an information source transfer instruction from the network control apparatus 100A is received (step S506). When the information source transfer instruction is received (step S506-YES), the information source processing unit 206A transmits an information source by unicast to each client wireless communication apparatus 300A to which connection is established in the previous step S504. (Step S507). At this time, the information source processing unit 206A causes the common wireless communication unit 207 to transmit the information source to the client wireless communication device 300A that has established a connection using the common wireless communication method. Further, the information source processing unit 206A causes the wireless communication processing unit 203 to transmit the information source to the client wireless communication device 300A that has established the connection by the software wireless communication method. After executing step S507 or when an information source transfer instruction is not received (step S506-NO), the process returns to step S501.

[Processing procedure example of client wireless communication device]
FIG. 18 shows an example of a processing procedure executed by the client wireless communication apparatus 300A in the second embodiment. The processing shown in this figure can be regarded as being executed by any of the functional units in the client wireless communication apparatus 300A shown in FIG.

  First, the response control unit 305A determines whether or not the inquiry from the host wireless communication device 200A has been received by the common method compatible wireless communication unit 307 (step S601). When the inquiry is received (step S601—YES), the response control unit 305A transmits a response to the received inquiry by a wireless communication method corresponding to software defined radio (step S602). That is, the response control unit 305A causes the wireless communication processing unit 303 to transmit a response addressed to the host wireless communication device 200A. If no inquiry is received (step S601—YES), step S602 is skipped.

  Next, the information source processing unit 306A determines whether or not the information source transmitted from the host wireless communication device 200A has been received by the common method compatible wireless communication unit 307 or the wireless communication processing unit 303 (step S603). When the information source is received (step S603: YES), the information source processing unit 206A executes a process for storing the received information source (step S604). After the process of step S604 is completed or when the information source is not received, the process returns to step S601.

<Modification>
[First Modification]
Next, a modified example in the present embodiment will be described. FIG. 19 shows a configuration example of a wireless communication system corresponding to the first modification. The first modification is based on the first embodiment. In FIG. 19, the same parts as those in FIG.

  19, fixed-system wireless communication devices 500-1 and 500-2 are added to the configuration shown in FIG. The host wireless communication apparatus 200 and the client wireless communication apparatus 300 are set with a wireless communication system by software wireless. On the other hand, the wireless communication systems 500-1 and 500-2 have a wireless communication system fixedly set according to hardware specifications.

  Here, it is assumed that the wireless communication system B is fixedly set in the fixed wireless communication apparatus 500-1. It is assumed that the wireless communication system A is fixedly set in the fixed wireless communication apparatus 500-2. In the following description, when it is not necessary to distinguish between fixed-system wireless communication devices 500-1 and 500-2, they are referred to as fixed-system wireless communication device 500.

  In the first modification, a local area network is formed including the fixed wireless communication apparatus 500. For this reason, when the terminal that has returned the response to the inquiry made by the host wireless communication device 200 and the client wireless communication device 300 is the fixed wireless communication device 500, the host wireless communication device 200 and the client wireless communication device 300 Establish a connection.

  That is, in the example of FIG. 19, the first client wireless communication device 300-1 and the fixed wireless communication device 500-1 respond as the host wireless communication device 200 makes an inquiry using the wireless communication method B. I will return it. Therefore, the host wireless communication device 200 establishes communication with the first client wireless communication device 300-1 by the wireless communication method B. In the case of the first embodiment, the response from the fixed wireless communication apparatus 500-1 is ignored. However, the host wireless communication device 200 according to the modification establishes communication with the fixed wireless communication device 500-1 by the wireless communication method B.

Similarly, in response to the first client wireless communication device 300-1 making an inquiry using the wireless communication method A, the second client wireless communication device 300-2 and the fixed method wireless communication device 500-2 return a response. come. Therefore, the first client wireless communication device 300-1 establishes communication with the second client wireless communication device 300-2 by the wireless communication method A. In addition, communication is established by the wireless communication system A with the fixed wireless communication apparatus 500-2.
As described above, in the first modification, not only the client wireless communication device 300 that performs software wireless communication but also the fixed wireless communication devices 500A-1 and 500A-2 can be included in the local area network.

[Second Modification]
FIG. 20 shows a configuration example of a wireless communication system corresponding to the second modification. The second modification is based on the second embodiment. In FIG. 20, the same parts as those in FIGS. 10 and 19 are denoted by the same reference numerals.

  In FIG. 20, fixed-system wireless communication devices 500A-1 and 500A-2 are added to the configuration shown in FIG. Fixed wireless communication apparatus 500A-1 is configured to be capable of wireless communication using wireless communication system B that is fixedly set and wireless communication using a common wireless communication system. The fixed wireless communication apparatus 500A-2 is configured to be able to perform wireless communication using the wireless communication system A that is fixedly set and wireless communication using the common wireless communication system.

  Then, the host wireless communication device 200A in FIG. 20 has established a connection with each of the client wireless communication devices 300A. In addition, connection is established with the fixed wireless communication apparatuses 500A-1 and 500A-2. Accordingly, in FIG. 20, the fixed wireless communication devices 500A-1 and 500A-2 are included in the local area network together with the client wireless communication device 300A.

  In order to form a local area network in this way, the host wireless communication device 200A and the fixed wireless communication devices 500A-1 and 500A-2 may be operated as follows. That is, the host wireless communication device 200A transmits an inquiry by broadcast using the common wireless communication method as in the second embodiment. When the fixed wireless communication device 500A-1 receives an inquiry through wireless communication using the common wireless communication method, the fixed wireless communication device 500A-1 transmits a response to the host wireless communication device 200A using the wireless communication method B that is fixedly set. When the fixed wireless communication device 500A-2 receives an inquiry through wireless communication using the common wireless communication method, the fixed wireless communication device 500A-2 transmits a response to the host wireless communication device 200A using the wireless communication method A that is also fixedly set. .

  Then, the host wireless communication device 200A operates to establish a connection by the wireless communication method B in response to receiving a response from the fixed method wireless communication device 500A-1. Similarly, the host wireless communication device 200A operates to establish a connection by the wireless communication method C in response to receiving a response from the fixed method wireless communication device 500A-2. Thereby, fixed system radio communication apparatuses 500A-1 and 500A-2 can be included in the local area network.

[Third Modification]
FIG. 21 shows a configuration example of a wireless communication system corresponding to the third modification. The third modification is based on the second embodiment. In FIG. 21, the same parts as those in FIG. 10 are denoted by the same reference numerals.

  In FIG. 21, the host wireless communication device 200A is omitted. In addition, the network control device 100B establishes a connection with the client wireless communication device 300A. That is, a local area network centering on the network control device 100B is formed.

  In order to form a local area network by the network control device 100B in this way, the network control device 100B is configured by giving the function of the host wireless communication device 200A shown in FIG. That is, the network control apparatus 100B transmits an inquiry by broadcast using a common wireless communication method. Then, in response to receiving a response to the inquiry, the network control device 100B establishes a connection with the client wireless communication device 300A that is the transmission source of the response. At this time, the network control device 100B establishes a connection by a wireless communication method that has received a response. In the case of the third modification, for example, only one network control device 100B is required to be installed in response to the occurrence of a disaster.

[Modification 4]
In the fourth modification, the network control device 100 (100A, 100B) is configured to be given a wireless communication scheme selection policy. That is, although description by illustration is omitted, after the local area network is formed, the network control device 100 is a predetermined index that is an indicator of radio wave reception status such as reception power from the host wireless communication device 200 and the client wireless communication device 300. Get the parameters. Then, the network control device 100 loads and sets an appropriate wireless communication method for each of the host wireless communication device 200 and the client wireless communication device 300 based on the acquired parameters.

  As a specific example of setting the wireless communication method, for example, it is conceivable to specify a wireless communication method using a frequency band in which the radio wave condition is good and set the wireless communication method. In addition, power-related information is acquired from the host wireless communication device 200 and the client wireless communication device 300, and a low-power-consumption wireless communication method is selected for a battery-powered device. This is to load.

  1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed.・ ・ You may do. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... House, 100, 100A, 100B ... Network control apparatus, 101 ... Communication part, 102 ... Memory | storage part, 103 ... Load control part, 104, 104A, 104B ... Inquiry instruction part, 105 ... Information source processing part, 200, 200A DESCRIPTION OF SYMBOLS ... Host wireless communication apparatus, 201 ... Communication part, 202 ... Load part, 203 ... Wireless communication processing part, 204, 204A ... Inquiry control part, 205 ... Response control part, 206, 206A ... Information source processing part, 207 ... Common system Corresponding wireless communication unit, 300, 300A ... client wireless communication device, 301 ... communication unit, 302 ... loading unit, 303 ... wireless communication processing unit, 304 ... inquiry control unit, 305, 305A ... response control unit, 306, 306B ... information Source processing unit, 307... Common communication wireless communication unit

Claims (4)

A wireless signal processing device for storing a plurality of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and a second for performing wireless communication between the first base station and the second base station. A wireless communication system comprising:
The first base station is
A storage unit for storing the software;
An inquiry unit for making an inquiry to the second base station based on the wireless method supported by the software stored in the storage unit;
If there is no response from the second base station even if the inquiry unit makes an inquiry based on all the wireless methods stored in the storage unit, the wireless method software not stored in the storage unit is An acquisition unit for acquiring from a wireless signal processing device;
With
A said 2nd base station is a radio | wireless communications system provided with the response part which responds using the said radio | wireless system, when an inquiry is received from the said 1st base station by the radio | wireless system which an own apparatus can use. A wireless signal processing device for storing a plurality of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and a second for performing wireless communication between the first base station and the second base station. A wireless communication system comprising:
The first base station is
An inquiry unit for making an inquiry to the second base station using a common radio control signal;
A determination unit that receives a response from the second base station in response to the inquiry, and determines that the wireless method used for the response is a wireless method that can be used by the second base station;
With
A said 2nd base station is a radio | wireless communications system provided with the response part which responds using the radio | wireless system which an own apparatus can use according to the inquiry using the said common radio control signal. A wireless signal processing device for storing a plurality of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and a second for performing wireless communication between the first base station and the second base station. A wireless communication method performed by a wireless communication system comprising:
An inquiry step in which the first base station reads the software from a storage unit that stores the software, and makes an inquiry to the second base station based on the wireless method supported by the software;
If the first base station makes an inquiry based on all the radio systems stored in the storage unit and there is no response from the second base station, radios not stored in the storage unit An acquisition step of acquiring software of a method from the wireless signal processing device;
A response step of responding using the wireless method when the second base station receives an inquiry from the first base station in a wireless method usable by the device;
A wireless communication method. A wireless signal processing device for storing a plurality of software corresponding to different wireless systems, a first base station connected to the wireless signal processing device, and a second for performing wireless communication between the first base station and the second base station. A wireless communication method performed by a wireless communication system comprising:
An inquiry step in which the first base station makes an inquiry to the second base station using a common radio control signal;
The first base station receives a response from the second base station in response to the inquiry, and determines that the radio system used for the response is a radio system that can be used by the second base station. A determination step to:
In response to the inquiry using the common radio control signal, the second base station responds using a radio system that can be used by the own device;
A wireless communication method.

Images