JP6261913B2 - Wireless communication system, base station apparatus - Google Patents

Description

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

  Conventionally, in order to connect a terminal station device to a network, a device such as a router or a bridge is used for communication. Such communication is performed not only by wire but also by radio. In recent years, wireless base station apparatuses (access points) that can be freely connected are installed in various places in order to improve user convenience. In addition, the miniaturization of base station devices has progressed, and mobile routers, which are portable routers, are also widely used. Due to such a background, the terminal station apparatus may be able to select a base station apparatus for connection to the network from a plurality of base station apparatuses. When a connection destination base station device is selected from a plurality of base station devices, there are a method of selecting a base station device that has been connected recently, a method of manually selecting a base station device, and the like. Further, from the viewpoint of selecting a device related to a network, Patent Document 1 discloses a communication cost of a network device (a relay device having a relay function in an ad hoc network), and fine control of a communication path according to the remaining power. Techniques that enable this are disclosed.

Japanese Patent No. 4877769

  However, the conventional technique has a problem that it is not always possible to select a base station apparatus that meets the requirements. For example, Patent Literature 1 does not describe a method for selecting a base station device by a terminal station device before establishing communication, and cannot solve the above-described problem.

    The present invention has been made in view of the above points, and provides a radio communication system and a base station apparatus for selecting a base station apparatus suitable as a connection destination from a plurality of base station apparatuses.

The present invention has been made to solve the above problems, and one aspect of the present invention is a wireless communication system in which a plurality of base station apparatuses and terminal station apparatuses communicate wirelessly, and the base station Each of the devices determines an encryption method as information for selecting a base station device with which the terminal station device establishes communication among the plurality of base station devices , based on the status information of the own device , A base station side wireless communication unit that transmits the determined encryption method , wherein the terminal station device receives the encryption method from each of the plurality of base station devices; and the terminal side wireless communication Compares the received encryption methods with each other, and selects one base station device that has transmitted the strongest encryption method among the plurality of base station devices as a base station device with which the device establishes communication And a selection unit It is a wireless communication system.

Further, according to one aspect of the present invention, in the above wireless communication system, each of the base station devices determines a strength encryption method based on a degree of an internal state of the own device .

One embodiment of the present invention is the base station device in a wireless communication system in which a plurality of base station devices and terminal station devices communicate with each other , and the plurality of base station devices based on state information of the device itself A base station device comprising a base station side wireless communication unit for determining an encryption method and transmitting the determined encryption method as information for selecting a base station device with which the terminal station device establishes communication is there.

  According to the present invention, a base station apparatus suitable as a connection destination can be selected from a plurality of base station apparatuses.

It is a figure which shows an example of the radio | wireless communications system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the base station apparatus which concerns on 1st Embodiment. It is a block diagram which shows an example of a function structure of the radio | wireless communications system which concerns on 1st Embodiment. It is a table | surface which shows an example of the priority setting table which concerns on 1st Embodiment. It is a flowchart which shows an example of the selection process of the base station apparatus by the terminal station apparatus which concerns on 1st Embodiment. It is a block diagram which shows an example of a function structure of the radio | wireless communications system which concerns on 2nd Embodiment. It is a figure explaining an example of the setting method of the priority which concerns on 2nd Embodiment.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual diagram of a wireless communication system 1 according to the first embodiment of the present invention. The wireless communication system 1 is a system in which a plurality of base station devices 200 and terminal station devices 100 communicate wirelessly, and these constitute a part of a LAN (Local Area Network). The terminal station device 100 is, for example, a smartphone, a tablet terminal, a notebook computer, or the like, and performs wireless communication with the base station device 200. Hereinafter, the terminal station device 100 will be described as a tablet terminal. The base station device 200 is a network device that connects a LAN and an external network NW by wire or wirelessly.

  The external network NW is, for example, a mobile phone network, a personal handy-phone system (PHS) network, a virtual private network (VPN) network, a dedicated communication network, a wide area network (WAN), or a public switched telephone network (PSTN). A telephone network), or an information communication network configured by a combination thereof. In the present embodiment, the base station apparatus 200 that can communicate with the terminal station apparatus 100 is described as three (200-1 to 200-3), but there are a plurality of base station apparatuses 200 that can communicate with the terminal station apparatus 100. What is necessary is just 2 or 4 or more.

  In this example, base station apparatus 200-1 is smartphone A, base station apparatus 200-2 is smartphone B, and base station apparatus 200-3 is a mobile router. The smartphones A and B described above have a so-called tethering function. The tethering function relays communication like an external modem of the terminal station device 100 by using a connection function with an external network NW such as a mobile phone network built in the own device and a connection function with the terminal station device 100. It is a function to do. Although not shown here, the base station apparatus 200 may be connected to the external network NW by wire. Further, the terminal station device 100 may be connected to the base station device 200 by a wire.

  FIG. 2 is a diagram illustrating an example of the configuration of the terminal station apparatus 100 according to the present embodiment. The terminal station device 100 includes a CPU (Central processing unit) 10, a storage unit 11, an input unit 12, an output unit 13, a wireless communication unit 14, and a battery 15. These members are connected to each other via a bus, GPIO (General Purpose Input / Output), etc., and power is supplied from the battery 15 to each member.

  The CPU 10 implements various functions by executing programs stored in the storage unit 11. The storage unit 11 is, for example, an HDD, an SSD, an EEPROM, a ROM, or a RAM, and stores various programs (firmware, application programs, etc.) executed by the CPU 10 of the terminal station device 100 and various processing results performed by the CPU 10. .

  The input unit 12 includes, for example, a contact sensor that detects input from a touch panel, a hardware key, a microphone that converts collected sound into an audio signal (electrical signal), and the like. Various types of contact sensor detection mechanisms are employed. For example, you may employ | adopt the contact detection mechanism using systems, such as a resistive film system, an electrostatic capacitance system, an infrared system, and a surface acoustic wave system. The output unit 13 includes, for example, a display unit that displays an image and a speaker that outputs sound and sound. A liquid crystal display, an organic EL (Electroluminescence) display, etc. can be used for a display part. The touch panel includes a display unit and a contact sensor of the input unit 12, for example, stacked on each other. The wireless communication unit 14 includes an antenna, an encoding / decoding unit, a modulation / demodulation unit, an amplification unit, an up / down converter, and the like, and can perform wireless communication with the base station apparatus 200. The wireless communication unit 14 may or may not have a function of connecting to the upper network.

  The configuration (not shown) of base station apparatus 200 is basically the same as the configuration of terminal station apparatus 100 shown in FIG. However, the radio communication unit of the base station apparatus 200 includes a configuration for communicating with the host network and the terminal station apparatus 100.

  FIG. 3 is a block diagram illustrating an example of a functional configuration of the wireless communication system 1 according to the present embodiment. The base station apparatus 200 includes a LAN side wireless communication unit 210, an uplink side wireless communication unit 212, a control unit 202, and a storage unit 204. The control unit 202 includes a priority management unit 220, a battery monitoring unit 232, a line speed monitoring unit 234, and a traffic monitoring unit 236. The storage unit 204 includes internal state information 240, an encryption program 260, and SSID information 280 in the storage area. The internal state information 240 includes battery remaining amount information 242, uplink side line information 244, and remaining packet amount information 246 in its storage area. The priority management unit 220, the battery monitoring unit 232, the line speed monitoring unit 234, and the communication amount monitoring unit 236 are software function units that function when, for example, the CPU of the control unit 202 executes a program stored in the storage unit. is there.

  The encryption program 260 includes a WPA2 (Wi-Fi protected access 2) encryption program 262, a WPA (Wi-Fi protected access) encryption program 264, and a WEP (Wired equivalent privacy) encryption program 266. There are three types. These programs are programs for encrypting communication between the base station apparatus 200 and the terminal station apparatus 100, and have different encryption strengths. The encryption strength of the encryption method based on these three programs is highest in the WPA2 method, and next in the WPA method. The encryption strength of the WEP method is the lowest. In the priority setting table 250, the three types of encryption methods by the three encryption programs and the internal state information 240 are managed in association with each other. The priority setting table 250 will be described later. The SSID information 280 is information indicating an SSID (Service set identifier) of the own device. The SSID is an identifier of the base station apparatus 200.

  In the present embodiment, the three types of encryption schemes having different encryption strengths select the base station apparatus with which the terminal station apparatus 100 among the plurality of base station apparatuses 200-1 to 200-3 establishes communication. Indicates the priority for Since the base station apparatus 200 having a high priority in the selection selects an encryption method with a high encryption strength as will be described later, the terminal station apparatus 100 is notified from the plurality of base station apparatuses 200-1 to 200-3. By comparing the encrypted schemes, a base station apparatus with a high priority can be selected. In addition, by making the priority correspond to the encryption method that has been used conventionally, the base station apparatus 200 does not generate a new communication for transmission of the priority information, and the base station apparatus 200 prioritizes its own apparatus. It is possible to notify the terminal station device 100 of the degree.

  The uplink side wireless communication unit 212 communicates with the external network NW. The communication status with the external network NW performed by the uplink side wireless communication unit 212 is monitored by the line speed monitoring unit 234 and the traffic monitoring unit 236. The line speed monitoring unit 234 determines the type of the external network NW with which the uplink side wireless communication unit 212 is communicating, and stores the communication standard of the network NW in the storage unit 204 as the uplink side line information 244.

  The communication amount monitoring unit 236 adds up the amount of data received via the uplink side wireless communication unit 212 and the amount of transmitted data. Further, the traffic monitoring unit 236 subtracts the total amount of data transmitted / received via the uplink wireless communication unit 212 from the amount of communication data permitted by the uplink wireless communication unit 212 of the base station apparatus 200. The remaining packet amount information 246 is stored in the storage unit 204. In the present embodiment, the communication amount monitoring unit 236 uses a packet as a unit of the amount of communication data, and manages the remaining amount of the allowable amount of communication data.

  The priority management unit 220 acquires the internal state information 240. In addition, the priority management unit 220 refers to the priority setting table 250 and selects an encryption method associated with the internal state information 240 acquired from the priority setting table 250. In the present embodiment, the encryption method selected by the priority management unit 220 is any one of the WPA2, WPA, and WEP methods. However, usable encryption methods are not limited to these three. The priority management unit 220 outputs information indicating the selected encryption method to the LAN-side wireless communication unit 210. The LAN-side wireless communication unit 210 transmits the information indicating the encryption method input from the priority management unit 220 and the SSID information 280 stored in the storage unit 204 to the terminal station device 100. That is, the LAN side wireless communication unit 210 transmits priority information.

  The terminal station apparatus 100 includes a terminal-side wireless communication unit 110, a control unit 102, and a storage unit 104. The control unit 102 includes a selection unit 120 and a radio base station management unit 130. The storage unit 104 includes a radio base station management table 140 and an encryption program 160 in its storage area. The selection unit 120 and the radio base station management unit 130 are software function units. The encryption program 160 includes the same WPA2 encryption program 162, WPA encryption program 164, and WEP encryption program 166 as those stored in the base station apparatus 200.

  The terminal-side wireless communication unit 110 receives information indicating the encryption method, which is priority information, and SSID information indicating each SSID of the base station device 200 from the LAN-side wireless communication units 210 of the plurality of base station devices 200. . That is, the terminal-side wireless communication unit 110 receives priority information from each of the plurality of base station devices 200. The terminal-side wireless communication unit 110 outputs the received information indicating the encryption method and SSID information to the wireless base station management unit 130.

  The radio base station management table 140 stores the SSID of the base station apparatus 200 to which the terminal station apparatus 100 has been connected so far and the connection establishment time in association with each other. The radio base station management unit 130 refers to the radio base station management table 140, and indicates the base station device 200 to which the own device has been connected among the SSIDs indicated by the SSID information input from the terminal-side radio communication unit 110. Extract SSID. The radio base station management unit 130 outputs a set of SSID information indicating the SSID and information indicating the encryption method to the selection unit 120. The selection unit 120 confirms each encryption method indicated by the information input from the radio base station management unit 130. The selection unit 120 compares the encryption strengths of the encryption methods, and selects SSID information associated with the encryption method having a high encryption strength. That is, the selection unit 120 selects a base station device with which the own device among the plurality of base station devices 200 establishes communication based on the priority information received by the terminal-side wireless communication unit 110.

  The selection unit 120 outputs a set of the selected SSID information and information indicating the encryption method to the terminal-side wireless communication unit 110. The terminal-side wireless communication unit 110 notifies the base station device 200 that is the transmission source of the SSID information input from the selection unit 120 that the terminal station device 100 has selected the base station device 200. The base station apparatus 200 and the terminal station apparatus 100 establish encrypted communication using the encryption programs 162 to 166 and the corresponding encryption programs 262 to 266 notified by the base station apparatus 200. . When communication is established, the radio base station management unit 130 of the terminal station apparatus 100 stores the SSID of the connection destination base station apparatus 200 and the time of connection in the radio base station management table 140.

  FIG. 4 is a table showing an example of the priority setting table 250 according to the present embodiment. 4A to 4C are tables showing examples of priority setting tables of the base station apparatuses 200-1 to 200-3 in FIG. Hereinafter, in order to avoid confusion, each of the functional blocks (FIG. 3) of the base station apparatuses 200-1 to 200-3 is denoted by reference numerals −1 to −3. For example, the priority setting table of the base station apparatus 200-1 is 250-1, the priority setting table of the base station apparatus 200-2 is 250-2, and the priority setting table of the base station apparatus 200-3 is 250-. 3. In the example of the priority setting table 250 shown in FIGS. 4A to 4C, the column C400 indicates an encryption program. Column C402 indicates the remaining battery level indicated by the remaining battery level information 242 in the internal state information 240 of the base station apparatus 200. Column C404 indicates the line type indicated by the uplink-side line information 244 in the internal state information 240 of the base station apparatus 200. Column C406 indicates the remaining data amount of communication that can be performed via the uplink-side wireless communication unit 212 indicated by the remaining packet amount information in the internal state information 240 of the base station apparatus 200.

  FIG. 4A is an example of the priority setting table 250-1 of the base station apparatus 200-1 of FIG. In this embodiment, the base station apparatus 200-1 is a smartphone. In this example, the remaining battery level of the base station apparatus 200-1 is classified into three types: 100 to 60%, 59 to 30%, and 29 to 0%. Since the terminal with the higher remaining battery level enables continuous communication, the base station apparatus with the higher remaining battery level is suitable for the terminal station apparatus 100 as the communication partner. Therefore, the case where the remaining battery level is higher among the three remaining battery levels is associated with an encryption method with higher encryption strength. When the remaining battery level is as high as 90%, for example, the priority management unit 220 uses a high encryption strength WPA2 encryption associated with 100 to 60% remaining battery level in the priority setting table 250. Select a method. When the remaining battery level is as low as 10%, for example, the priority management unit 220 uses a low encryption strength WEP associated with the remaining battery level of 29 to 0% in the priority setting table 250. Select the encryption method.

  The communication line standards that can be connected to the uplink-side radio communication unit 212-1 of the base station apparatus 200-1 include LTE (Long term evolution), HSPA (High speed packet access), and W-CDMA (Wideband code division). There are three types of multiple access). The speed of these three types of communication lines is the fastest in LTE, followed by HSPA. W-CDMA is the slowest of these three types of lines. When a plurality of communication lines are available, base station apparatus 200 preferentially selects and connects a communication line with a higher line speed. For the terminal station apparatus 100, a base station apparatus with a higher line speed is suitable as a communication partner. Accordingly, a line having a higher communication speed among the three types of communication lines is associated with an encryption method having a higher encryption strength.

  For example, when the uplink-side wireless communication unit 212-1 performs communication via an LTE line having a high communication speed, the priority management unit 220-1 is associated with LTE in the priority setting table 250-1. The WPA2 encryption method with high encryption strength is selected. In addition, when the uplink-side wireless communication unit 212-1 is performing communication via an HSPA line having a medium communication speed, the priority management unit 220-1 determines that the priority setting table 250-1 A WPA encryption method having a medium encryption strength associated with the HSPA line is selected.

  The amount of communication via the uplink-side wireless communication unit 212-1 of the base station device 200-1 is set to 3 GB at the maximum, for example. In this example, the remaining packet amount of the base station apparatus 200-1 is classified into three, 3 to 2 GB, 2 to 1 GB, and 1 to 0 GB. For the terminal station apparatus 100, a base station apparatus with a large amount of remaining packets is more suitable as a connection destination because it can perform communication without paying special consideration to the communication volume. Therefore, a case where the remaining capacity is larger among the three classifications of the remaining packet amount is associated with an encryption method with higher encryption strength. When the remaining packet amount is medium, for example, 1.5 GB, the priority management unit 220-1 has a medium encryption strength associated with the remaining packet amount of 2 to 1 GB in the priority setting table 250-1. Select the WPA encryption method. When the remaining packet amount is as small as 0.3 GB, for example, the priority management unit 220-1 uses a low encryption strength WEP encryption associated with the remaining packet amount of 1 to 0 GB in the priority setting table 250-1. Select a method.

  FIG.4 (b) shows an example of the priority setting table 250-2 of the base station apparatus 200-2 as above-mentioned. Although the base station apparatus 200-2 is a smartphone similarly to the base station apparatus 200-1, the base station apparatus 200-1 is different from the contracted communication carrier. Therefore, the communication standard of the line to which the uplink side radio communication unit 212-2 of the base station apparatus 200-2 is connected is different from the line to which the uplink side radio communication unit 212-1 of the base station apparatus 200-1 is connected. ing. There are three types of communication standards that can be connected to the base station apparatus 200-2: LTE, EVDO (Evolution data only), and CDMA2000. As for the speed of these three types of communication lines, LTE is the fastest, followed by EVDO. CDMA2000 is the slowest of these three types of lines.

  In addition, the amount of communication via the uplink-side wireless communication unit 212-2 of the base station device 200-2 is larger than that of the base station device 200-1, and is set to 7 GB at the maximum. As described above, the maximum value of the uplink-side communication capacity may change depending on the contract between the user of the base station apparatus and the communication carrier. Moreover, although the battery remaining amount of the base station apparatus 200-2 is classified into the same three types as the base station apparatus 200-1, the numerical breakdown is different. As described above, the priority setting table 250 may classify the items by setting different numerical values for different models and associate them with the encryption method. Also, even for different models, the same numerical value may be set to classify the items, and the encryption method may be selected based on the same standard.

  FIG.4 (c) shows an example of the priority setting table 250-3 of the base station apparatus 200-2 as above-mentioned. The base station device 200-3 is a mobile router as described above. The communication standard of the line to which this base station apparatus 200-3 is connected is only WiMAX (Worldwide interoperability for microwave access). Moreover, there is no restriction | limiting in the communication capacity of the base station apparatus 200-3. Therefore, only the remaining battery level in the internal state information 240-3 is classified into three, and is associated with three types of encryption methods.

  As described above, the priority setting table 250 stores the information indicated by each of the internal state information 240 and the encryption method in association with each other. In the present embodiment, there are three types of internal state information 240: battery remaining amount information 242, uplink side line information 244, and remaining packet amount information 246. Therefore, there are several methods for selecting an encryption method. is there. For example, when the remaining battery level of the base station apparatus 200-1 is 45%, the uplink side line is LTE, and the remaining packet amount is 0.5 GB, the encryption associated with the internal state information 240 is encrypted. The methods are WPA, WPA2, and WEP, respectively. For example, if the encryption method is selected by paying attention to items that can limit the communication state of each base station apparatus 200, the encryption method that is the most encrypted among the encryption methods associated in the priority setting table 250-1 is selected. A method having a low strength may be selected. In the case of the above example, since the remaining packet amount is 0.5 GB, the corresponding WEP encryption method has the lowest encryption strength, and the selection unit 120 selects this. Moreover, the base station apparatus 200-1 may select a scheme with the highest encryption strength among the encryption schemes associated in the priority setting table 250-1, for example. In this case, the WPA2 encryption method corresponding to LTE on the uplink side line is selected.

  Further, the base station apparatus 200 may not use all of the internal state information 240 for selecting an encryption method. For example, when the user attaches importance to the line speed and the remaining packet amount, the encryption method may be selected from the encryption methods corresponding to the two items. In addition, the items managed by the priority management unit 220 need not be limited to the above three types of internal state information. For example, in the present embodiment, the priority management unit 220 manages the communication standard of the line connected to the uplink-side wireless communication unit 212 in association with the encryption strength. In addition to this, the radio wave condition of the communication line on the uplink side may be classified and associated with the encryption strength more finely.

FIG. 5 is a flowchart illustrating an example of selection processing of the base station device 200 by the terminal station device 100 according to the first embodiment.
(Step S500) The terminal-side radio communication unit 110 of the terminal station device 100 receives the SSID information received from the base station device 200 and information indicating the encryption method, and outputs the received information to the radio base station management unit 130. To do. Based on the information input from the terminal-side wireless communication unit 110, the radio base station management unit 130 checks the base station device 200 to which the terminal station device 100 can be connected.

(Step S502) The radio base station management unit 130 refers to the radio base station management table 140, and extracts the SSID of the base station apparatus that has established a connection with the terminal station apparatus 100 in the past. If there is no base station apparatus that has established a connection, the process returns to step S500.
(Step S504) The radio base station management unit 130 determines whether or not there is one extracted SSID. If there is one (step S504; YES), the process proceeds to step S510. If there are multiple (step S504; NO), the process proceeds to step S506.
(Step S506) The selection unit 120 confirms the encryption method associated with the SSID extracted by the radio base station management unit 130, and compares the encryption strength.

(Step S508) The selection unit 120 determines whether or not there is one encryption method having the highest encryption strength among the encryption methods compared in step S504. When there is one SSID indicating the encryption method with the highest encryption strength (step S508; YES), the process proceeds to step S510. When there are a plurality of SSIDs indicating the encryption methods with the highest encryption strength (step S508; NO), the process proceeds to step S512.
(Step S510) The terminal station apparatus 100 is connected to a base station apparatus that stores the SSID.
(Step S512) The terminal station apparatus 100 connects to the base station apparatus that stores the SSID having the connection history most recently among the SSIDs corresponding to the encryption scheme having the highest encryption strength.

  As described above, in the wireless communication system 1 in which the plurality of base station devices 200-1 to 200-3 and the terminal station device 100 communicate by radio, the LAN side wireless communication of the base station devices 200-1 to 200-3. Unit 210 transmits information indicating a communication encryption method as priority information indicating a priority for selecting a base station device 200 with which communication is established by terminal station device 100 among a plurality of base station devices 200. . The terminal-side wireless communication unit 110 of the terminal station device 100 receives information indicating the encryption method from each of the plurality of base station devices 200-1 to 200-3. The selection unit 120 of the terminal station apparatus 100 establishes communication among the plurality of base station apparatuses 200-1 to 200-3 based on the information indicating the encryption method received by the terminal-side wireless communication unit 110. Select a base station device. Therefore, the terminal station apparatus 100 can select a base station apparatus suitable as a connection destination from the plurality of base station apparatuses 200.

<Second Embodiment>
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings. As in the first embodiment, the wireless communication system 1a according to the present embodiment includes a base station device and a terminal station device. However, in the first embodiment, the priority is indicated by the encryption method, but in the present embodiment, the priority is added to the SSID as a character or a number. FIG. 6 is a block diagram illustrating an example of a functional configuration of the wireless communication system 1a according to the present embodiment. When the wireless communication system 1a (FIG. 6) according to the present embodiment is compared with the wireless communication system 1 (FIG. 3) according to the first embodiment, the functions of the terminal station device and the base station device are partially different.

  Specifically, the function provided in the priority management unit 220a of the base station apparatus 200a according to the present embodiment is partially different from the function provided in the priority management unit 220 of the base station apparatus 200 according to the first embodiment. Further, the base station apparatus 200a according to this embodiment includes a priority information adding unit 270. Further, the priority setting table 250a of the base station apparatus 200a according to the present embodiment is different in content from the priority setting table 250 of the base station apparatus 200 according to the first embodiment. The priority setting table 250 of the base station apparatus 200 according to the first embodiment stores the internal state information 240 and each encryption method in association with each other, but the priority setting of the base station apparatus 200a according to the present embodiment is stored. The table 250a stores each item of the internal state information 240 and each priority information indicating the priority in association with each other. However, other components (LAN side wireless communication unit 210, uplink side wireless communication unit 212, battery monitoring unit 232, line speed monitoring unit 234, traffic monitoring unit 236, and storage unit 204) are included in the base station device 200a. The provided function is the same as the function of each component of the base station apparatus 200 of the first embodiment.

  The functions of the selection unit 120a and the radio base station management unit 130a of the terminal station device 100a according to the present embodiment are the functions of the selection unit 120 and the radio base station management unit 130 of the terminal station device 100 according to the first embodiment, respectively. Some of the functions are different. The functions provided in the other components (terminal-side wireless communication unit 110 and storage unit 104) of the terminal station device 100a are the same as the functions provided in each component of the terminal station device 100 of the first embodiment. Hereinafter, the same reference numerals are used for components having the same function, and the description thereof is omitted.

  The priority management unit 220a according to the present embodiment acquires the internal state information 240 from the storage unit 204. The priority management unit 220a refers to the priority setting table 250a, and acquires priority information associated with each item of the acquired internal state information 240. In addition, the priority management unit 220a outputs the acquired priority information to the priority information addition unit 270. The priority information adding unit 270 refers to the SSID information 280 stored in the storage unit 204, generates priority-added SSID information indicating the SSID in which priority information is added to the SSID indicated by the SSID information. The data is output to the wireless communication unit 210. The LAN-side radio communication unit 210 transmits the priority-added SSID information input from the priority information adding unit 270 and information indicating the encryption schemes that the base station device 200a can handle to the terminal station device 100a. In the present embodiment, the information indicating the encryption method transmitted here may be unrelated to the priority information.

  The terminal-side radio communication unit 110 of the terminal station device 100a receives the SSID information and information indicating the encryption method from the plurality of base station devices 200a, and outputs them to the radio base station management unit 130a. The radio base station management unit 130a analyzes the SSID information input from the terminal-side radio communication unit 110, and acquires the SSID indicating the base station device 200a and the priority information added to the SSID. Also, the radio base station management unit 130a refers to the radio base station management table 140a, and extracts the SSID indicating the base station device 200a to which the terminal station device 100a has connected in the past from the acquired SSID. The radio base station management unit 130a outputs the extracted SSID and the corresponding priority information to the selection unit 120a. The selection unit 120a compares the priority information input from the radio base station management unit 130a, and selects the SSID of the connection destination base station device 200a.

  FIG. 7 is a diagram illustrating an example of a priority setting method according to the present embodiment. FIG. 7A is a diagram illustrating an example of the priority setting table 250a of the base station device 200a. Column C700 indicates the priority. Column C702 indicates the remaining battery level. Column C704 indicates the communication standard for the uplink side line. Column C706 indicates the remaining packet amount. In the priority setting table 250a in this embodiment, each item of the internal state information 240 is associated with a priority. Based on this priority setting table 250a, the base station apparatus 200a generates priority information from the internal state information 240.

  FIG. 7B is a table for explaining a method for generating an SSID to which priority information is added. In this figure, column C710 indicates the SSID of each of the three base station devices 200a. A column C712 indicates the remaining battery level indicated by the remaining battery level information 242. A column C714 indicates a communication standard of a line to which the uplink side wireless communication unit 212 indicated by the uplink side line information 244 is connected. Column C716 indicates the remaining packet amount indicated by the remaining packet amount information 246. A column C718 indicates an SSID obtained by adding priority information to the SSID of the base station apparatus 200a. The priority management unit 220a acquires the corresponding items of the columns C712, C714, and C716 from the internal state information 240 of the storage unit 204, and refers to the priority setting table 250a (FIG. 7A). Get the priority for each item.

  In FIG. 7B, a base station apparatus 200a having an SSID of “Phone1” will be described as an example. Since the battery remaining amount of “Phone1” is 70%, the priority for the remaining battery amount is “1”. Further, since the uplink side line is LTE, the priority for the uplink side line is “1”. Further, since the remaining packet amount is 1.5 GB, the priority for the remaining packet amount is “2”. When the remaining battery level is indicated by B, the uplink side line is indicated by L, and the remaining packet amount is indicated by P, the priorities for each are indicated by B1, L1, and P2. The priority management unit 220a outputs priority information indicating the priority generated in this way to the priority information addition unit 270. The priority information addition unit 270 generates a priority-added SSID “Phone1_B1_L1_P2” (column C718) by adding the priority information input from the priority management unit 220a to the SSID “Phone1” of the base station device 200a. To the side wireless communication unit 210. As described above, the terminal station device 100a compares the priority information added to the SSID, and selects the base station device 200a that stores the SSID to be connected. The selection of the base station device 200a based on the priority information is performed by comparing items having the lowest priority among the three internal state information 240 or by summing the priorities of the respective items as in the first embodiment. There is no particular limitation on the selection method.

  Note that some of the base station devices 200 and 200a and the terminal station devices 100 and 100a in the above-described embodiment, for example, the battery monitoring unit 232, the line speed monitoring unit 234, the traffic monitoring unit 236, and the priority management units 220 and 220a. The priority information adding unit 270, the selection units 120 and 120a, and the radio base station management units 130 and 130a may be realized by a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

  Here, the “computer system” is a computer system built in the base station apparatus 200, 200a or the terminal station apparatus 100, 100a, and includes hardware such as an OS and peripheral devices. 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. Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In this case, a volatile memory inside a computer system that serves as a server or a client may be included that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  Moreover, you may implement | achieve part or all of the base station apparatuses 200 and 200a and the terminal station apparatuses 100 and 100a in embodiment mentioned above as integrated circuits, such as LSI (Large Scale Integrated Circuit). Each functional block of the base station devices 200 and 200a and the terminal station devices 100 and 100a may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may be used.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  DESCRIPTION OF SYMBOLS 100, 100a ... Terminal station apparatus, 110 ... Terminal side radio | wireless communication part, 120, 120a ... Selection part, 130, 130a ... Radio base station management part, 140, 140a ... Radio base station management table, 200, 200a ... Base station apparatus , 210 LAN side wireless communication unit, 212 Uplink side wireless communication unit, 220, 220a Priority management unit, 232 Battery monitoring unit, 234 Line speed monitoring unit, 236 Traffic monitoring unit, 250, 250a Priority setting table, 270 Priority information adding section

Claims (3)

A wireless communication system in which a plurality of base station devices and terminal station devices communicate wirelessly,
Each of the base station devices
Based on the state information of the own device, the terminal station device of the plurality of base station devices determines an encryption method as information for selecting a base station device with which communication is established, and the determined encryption method The base station side wireless communication unit that transmits
The terminal station device
A terminal-side wireless communication unit that receives the encryption method from each of the plurality of base station devices;
Compare the encryption methods received by the terminal-side wireless communication unit, and the own device establishes communication with one base station device that has transmitted the strongest encryption method among the plurality of base station devices. A selection unit to select as a base station device;
A wireless communication system comprising: Each of the base station devices determines a strength encryption method based on the degree of the internal state of the device itself.
The wireless communication system according to claim 1. The base station apparatus in a wireless communication system in which a plurality of base station apparatuses and terminal station apparatuses communicate with each other,
Based on the state information of the own device, the terminal station device of the plurality of base station devices determines an encryption method as information for selecting a base station device with which communication is established, and the determined encryption method A base station apparatus comprising a base station-side radio communication unit that transmits.

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