Wireless communication system, terminal device, base station device, control device, and wireless communication system selection method

Abstract

A wireless communication system according to the present invention comprises: an information acquisition unit that acquires a wireless communication scheme characteristic for each wireless communication scheme and a communication request characteristic of a terminal device; and a selection unit that calculates, for each wireless communication scheme, the inner product of a first vector having values of items forming the wireless communication scheme characteristic as elements and a second vector having values of items forming the communication request characteristic as elements and selects a wireless communication scheme at a connection destination of the terminal device on the basis of the magnitude of the inner product of each wireless communication scheme.

Description

[Technical Field]

[0001] The present invention relates to a technique for selecting a wireless communication system to be used from a plurality of wireless communication systems. [Background technology]

[0002] In recent years, terminal devices are capable of selecting a wireless communication method to use from among a plurality of wireless communication methods. In a wireless communication system, the communication quality and communication performance of a terminal device largely depend on the wireless communication method of a base station device to which the terminal device is connected. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Ono et al., "Performance Evaluation of Communication Quality Prediction between Multiple Terminals and Multiple Base Stations Using Convolutional Neural Networks," IEICE Technical Report, vol. 121, no. 301, NS2021-108, pp. 59-64, December 2021. Summary of the Invention [Problem to be solved by the invention]

[0004] There are differences in communication characteristics among multiple wireless communication methods, so it is preferable for a terminal device to connect to a base station device that supports a wireless communication method that meets (is suitable for) its own communication requirements and communicate with the base station device using that wireless communication method.

[0005] However, the conventional techniques such as Non-Patent Document 1 do not take into consideration the difference in communication characteristics between wireless communication methods. Therefore, when a terminal device uses a wireless communication method selected by the conventional technique, sufficient communication quality may not be obtained.

[0006] The present invention has been made in consideration of the above points, and aims to provide a technology that enables a wireless communication method to be selected in accordance with the communication requirements of a terminal device, while taking into account the communication characteristics of each wireless communication method, in a wireless communication system in which multiple wireless communication methods are used. [Means for solving the problem]

[0007] According to the disclosed technology, an information acquisition unit that acquires wireless communication system characteristics for each wireless communication system and communication requirement characteristics of a terminal device; Calculating an inner product of a first vector whose elements are values ​​of items constituting the wireless communication system characteristics and a second vector whose elements are values ​​of items constituting the communication requirement characteristics for each wireless communication system; was calculated to of the dot product Among them, the N wireless communication methods whose size corresponds to the inner product of the top N (N is an integer of 2 or more) are , the terminal device Multiple simultaneous connections Wireless communication method of the destination as The selection section to select A wireless communication system is provided, comprising: [Effects of the Invention]

[0008] According to the disclosed technology, in a wireless communication system in which multiple wireless communication methods are used, a technology is provided that enables selection of a wireless communication method that corresponds to the communication requirements of a terminal device while taking into account the communication characteristics of each wireless communication method. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of the overall configuration of a wireless communication system. [Figure 2] 1 is a diagram illustrating wireless communication method characteristics and communication requirement characteristics; [Figure 3] FIG. 10 is a sequence diagram of an operation example 1. [Figure 4] FIG. 10 is a sequence diagram of an operation example 2. [Figure 5] FIG. 10 is a sequence diagram of an operation example 3. [Figure 6] FIG. 1 is a diagram illustrating a first configuration example. [Figure 7]FIG. 10 is a diagram illustrating a configuration example 2. [Figure 8] FIG. 10 is a diagram illustrating a configuration example 3. [Figure 9] FIG. 2 illustrates an example of a hardware configuration of the apparatus. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention (the present embodiment) will be described with reference to the drawings. The embodiment described below is merely an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0011] (Outline of the embodiment) As mentioned above, there are differences in communication characteristics among multiple wireless communication methods. Therefore, it is preferable for a terminal device to connect to a base station device that supports a wireless communication method that meets (is suitable for) its own communication requirements and communicate with the base station device using that wireless communication method.

[0012] For example, high frequency bands such as millimeter waves have high throughput and are less susceptible to unexpected radio wave interference from the surrounding area, but are susceptible to interference from obstructions.On the other hand, microwave bands are less susceptible to interference from obstructions because they can bend around the surrounding area, but are susceptible to unexpected radio wave interference from the surrounding area.

[0013] When a base station device using a wireless communication method that uses the millimeter wave band and a base station device using a wireless communication method that uses the microwave band are available, due to the difference in communication characteristics as described above, for example, a terminal device that is expected to be used in an environment with many obstructions is preferably connected to a base station device using a wireless communication method that uses the microwave band. In this embodiment, such a wireless communication method can be automatically selected based on the communication characteristics of each wireless communication method and the communication requirements of the terminal device.

[0014] A technology that enables selection of a wireless communication system according to the communication requirements of a terminal device while taking into consideration the communication characteristics of each wireless communication system will be described in detail below.

[0015] (Example of overall system configuration) 1 shows an example of the overall configuration of a wireless communication system according to this embodiment. The wireless communication system according to this embodiment includes a plurality of base station devices 10, a plurality of terminal devices 20, and a control device 100. The control device 100 may be provided in a core network of a mobile network, in the Internet, or in a network other than these.

[0016] The plurality of base station devices 10 includes two base station devices of different wireless communication systems. Note that the wireless communication system does not necessarily have to include the control device 100.

[0017] 1 shows, as examples of two base station devices 10 that use different wireless communication methods, a base station device 10A that supports a wireless communication method A and a base station device 10B that supports a wireless communication method B. The two different wireless communication methods may differ in any manner.

[0018] For example, the two different wireless communication methods may be a cellular method (e.g., 3G, 4G / LTE, 5G, 6G) and wireless LAN, may use different bands (e.g., high frequency band and low frequency band), may be different generations of wireless access methods (e.g., 4G and 5G), may be different core networks connected to base station devices (e.g., EPC and 5GC), may be different in the functions they support (e.g., with MIMO, without MIMO), or may be different in some other way.

[0019] Furthermore, even if the two wireless communication methods are the same from the above perspective, if the wireless communication characteristics are different between the two base station devices 10 due to the number of antennas attached to the base station device 10, the wireless parameter settings in the base station device 10, the operating mode settings in the base station device 10, etc., then the two base station devices 10 may be considered to have "different wireless communication methods."

[0020] A terminal device 20 wirelessly connects to and communicates with one base station device 10. Depending on the functions of the terminal device 20, the terminal device 20 may simultaneously connect to and communicate with multiple base station devices 10 wirelessly. One base station device 10 may also support multiple wireless communication methods.

[0021] (Example of operation of a wireless communication system) An operation example of the wireless communication system in this embodiment will be described below. In this embodiment, the entity that selects the wireless communication method that should be supported by the base station device 10 to which the terminal device 20 is connected may be any of the terminal device 20, the base station device 10, and the control device 100, and therefore these will be described below as operation examples 1 to 3. In describing operation examples 2 and 3, matters that are the same as those described in operation example 1 will be omitted or only briefly described. Note that "a wireless communication method that should be supported by the base station device 10 to which the terminal device 20 is connected" may also be rephrased as "a wireless communication method to which the terminal device 20 is connected."

[0022] <Operation Example 1: Selection of Wireless Communication Method by Terminal Device 20> First, a description will be given of Operation Example 1. In Operation Example 1, the terminal device 20 selects a wireless communication system for its own connection destination.

[0023] As a premise for the operation here, it is assumed that the control device 100 holds a table summarizing wireless communication system characteristics for each wireless communication system, as shown in Fig. 2(a), and a table summarizing communication requirement characteristics for each terminal device, as shown in Fig. 2(b). Note that holding this information as a table is an example. It may also be held in a format other than a table. Furthermore, the communication requirement characteristics may also be called communication requirements.

[0024] The information shown in Fig. 2 may be collected by any method. For example, the wireless communication method characteristics may be manually set in advance by a system administrator for each wireless communication method. Alternatively, the control device 100 may collect information about the wireless communication method from each base station device 10 and calculate the wireless communication method characteristics for each wireless communication method from the collected information. For example, information indicating long-distance communication quality (measurement results from a distant terminal, etc.) may be received from the base station device 10 of wireless communication method A, and the quality of the long-distance communication quality of wireless communication method A may be determined from the information.

[0025] Furthermore, the control device 100 may acquire contract information of the user of each terminal device 20 from the subscriber information database and calculate (set) the communication requirement characteristics for each terminal device 20 based on the contract information. Alternatively, the control device 100 may acquire terminal capability information of the terminal device 20 from the base station device 10 that holds the terminal capability information, and calculate (set) the communication requirement characteristics for each terminal device 20 based on the terminal capability information.

[0026] Furthermore, the communication requirement characteristics of the terminal devices 20 may not be stored in the control device 100, but may be stored by each individual terminal device 20 itself.

[0027] In the example of Figure 2, the characteristic items used are resistance to radio wave blocking, risk of radio wave interference, communication area, near-field communication quality, and far-field communication quality, but these are just examples, and other characteristic items may also be used.

[0028] In this embodiment, the items in the wireless communication system characteristics and the items in the communication requirement characteristics are the same. However, this is an example, and different items may be included between the items in the wireless communication system characteristics and the items in the communication requirement characteristics. In this case, the inner product calculation described below simply involves calculating the product of the same items.

[0029] Regarding the wireless communication method characteristics, "1" in "Resistance to radio wave blocking" indicates that there is resistance to radio wave blocking, and "0" indicates that there is no resistance. "1" in "Risk of radio wave interference" indicates that there is no risk of radio wave interference, and "0" indicates that there is a risk. "1" in "Communication area" indicates that the communication area is wide, and "0" indicates that it is narrow. "1" in "Near communication quality" indicates that the near communication quality is good, and "0" indicates that the near communication quality is poor. "1" in "Far communication quality" indicates that the far communication quality is good, and "0" indicates that the far communication quality is poor.

[0030] Regarding the communication requirement characteristics of the terminal device 20, a "1" in "Resistance to radio wave blocking" indicates that resistance to radio wave blocking is required, and a "0" indicates that resistance is not required. A "1" in "Risk of radio wave interference" indicates that the risk of radio wave interference is not acceptable, and a "0" indicates that the risk is acceptable. A "1" in "Communication area" indicates that the communication area must be wide, and a "0" indicates that the communication area can be narrow. A "1" in "Near communication quality" indicates that near communication quality must be good, and a "0" indicates that near communication quality does not have to be good. A "1" in "Far communication quality" indicates that far communication quality must be good, and a "0" indicates that far communication quality does not have to be good.

[0031] That is, in the example shown in FIG. 2, for a certain item, "1" in the wireless communication system characteristics indicates a preferable wireless communication system characteristic when the communication requirement characteristic is "1".

[0032] Operation example 1 will be described with reference to the sequence of Fig. 3. When the terminal device 20 connects to a wireless network, first, in S101, the terminal device 20 transmits an information request to the control device 100, and in S102, acquires information from the control device 100. Note that the base station device 10 to be used at this time may be, for example, a base station device 10 of any available wireless communication method.

[0033] The information acquired in S102 is the wireless communication system characteristics for each wireless communication system shown in FIG. 2(a) and the communication requirement characteristics for the target terminal device 20.

[0034] In S103, the terminal device 20 selects a wireless communication method to connect to based on the information acquired in S102. In S104, the terminal device 20 connects to a base station device 10 that supports the selected wireless communication method. Note that the terminal device 20 can determine which base station device 10 supports which wireless communication method, for example, from system information broadcast from each base station device 10. Details of the method for selecting a wireless communication method in S103 are as follows.

[0035] The terminal device 20 calculates the inner product of the wireless communication system characteristics and its own communication requirement characteristics for each wireless communication system. That is, it calculates the inner product of a vector in which the values ​​of the items of the wireless communication system characteristics are arranged and a vector in which the values ​​of the items of the communication requirement characteristics are arranged.

[0036] The terminal device 20 selects the wireless communication method corresponding to the largest inner product among the inner products calculated for each wireless communication method as the wireless communication method to connect to. By selecting the wireless communication method with the largest inner product, it is possible to select the wireless communication method that best satisfies the communication requirements of the terminal device 20.

[0037] For example, in the example of FIG. 2, assume that "Terminal 1" is the target terminal device 20. In this case, B A S1=3, B B ·Since S1=0, the terminal device 20 selects the wireless communication method A as the wireless communication method to connect to.

[0038] As described above, selecting the wireless communication scheme corresponding to the largest inner product among the inner products calculated for each wireless communication scheme is one example. For example, the terminal device 20 may select any wireless communication scheme from N wireless communication schemes corresponding to the largest N inner products in magnitude among the inner products calculated for each wireless communication scheme. Here, N is an integer of 2 or more. Furthermore, the terminal device 20 may select N wireless communication schemes corresponding to the largest N inner products in magnitude among the inner products calculated for each wireless communication scheme, and perform communication using the N wireless communication schemes simultaneously. N may be 2, 3, 4 or more.

[0039] Furthermore, to take into account the simultaneous use of multiple connection destinations (wireless communication methods), a column for simultaneous use of multiple wireless communication methods can be added to the "wireless communication method characteristics for each wireless communication method" (table shown in Figure 2(a)), and evaluation can then be performed using the inner product. For example, a column for "wireless communication method A+B" can be added to the table shown in Figure 2(a). If the vector in this column is (1,1,1,1,1), the method with the largest inner product for terminal 2 is "wireless communication method A+B."

[0040] In the above example, the values ​​for each item in the "wireless communication method characteristics for each wireless communication method" and the "communication requirement characteristics for each terminal device" take two values, 0 and 1, but this is not limited to this.

[0041] The value P for each item in the "wireless communication system characteristics for each wireless communication system" and the "communication requirement characteristics for each terminal device" may be a continuous value that satisfies 0≦P≦1, and weights may be set flexibly. For example, items with high importance may be set to a value close to 1. Furthermore, a value greater than 1 may be set as the value P for each item in the "wireless communication system characteristics for each wireless communication system" and the "communication requirement characteristics for each terminal device."

[0042] Furthermore, the value P for each item in the "wireless communication system characteristics for each wireless communication system" and the "communication requirement characteristics for each terminal device" may be set to a value less than 0. This allows a "negative evaluation" of the item.

[0043] <Operation Example 2: Selection of Wireless Communication Method by Base Station Device 10> Next, a description will be given of Operation Example 2. In Operation Example 2, the base station device 10 selects a wireless communication system to which the terminal device 20 is to be connected.

[0044] Operation example 2 will be described with reference to the sequence diagram of Fig. 4. As a premise of operation example 2, it is assumed that the table shown in Fig. 2 is stored in the control device 100, similar to operation example 1.

[0045] In S201, the terminal device 20 transmits a connection request to the base station device 10. The base station device 10 to be used at this time may be, for example, a base station device 10 of any available wireless communication method.

[0046] In S202, the base station device 10 transmits an information request to the control device 100, and in S203, acquires information from the control device 100.

[0047] The information acquired in S203 is the wireless communication system characteristics for each wireless communication system shown in FIG. 2(a) and the communication requirement characteristics for the target terminal device 20.

[0048] In S204, based on the information acquired in S203, the base station device 10 selects a wireless communication system to be connected to the terminal device 20. The selection method is as explained in the first operation example.

[0049] In S205, the base station device 10 notifies the terminal device 20 of the selected wireless communication method. This notification includes, for example, a command to connect to the base station device 10 of the selected wireless communication method.

[0050] In S206, the terminal device 20 connects to the base station device 10 that supports the wireless communication method notified by the base station device 10.

[0051] <Operation Example 3: Selection of Wireless Communication Method by Control Device 100> Next, a description will be given of Operation Example 3. In Operation Example 3, the control device 10 selects a wireless communication system to which the terminal device 20 is to be connected.

[0052] Operation example 3 will be described with reference to the sequence diagram of Fig. 5. As a premise of operation example 3, it is assumed that the table shown in Fig. 2 is stored in the control device 100, similar to operation example 1.

[0053] In S301, the terminal device 20 transmits a connection request to the base station device 10. The base station device 10 to be used at this time may be, for example, a base station device 10 of any available wireless communication method.

[0054] In S302, the base station device 10 transmits a selection request to the control device 100 to request the control device 100 to select a wireless communication system for the terminal device 20.

[0055] In S303, the control device 100 selects a wireless communication method to which the terminal device 20 is to be connected, based on the wireless communication method characteristics of each wireless communication method and the communication requirement characteristics of the target terminal device 20. The selection method is as described in the first operation example.

[0056] In S304, the control device 100 notifies the requesting base station device 10 of the selected wireless communication method. In S305, the base station device 10 notifies the terminal device 20 of the selected wireless communication method. This notification includes, for example, a command to connect to the base station device 10 of the selected wireless communication method. In S306, the terminal device 20 connects to the base station device 10 that supports the wireless communication method notified by the base station device 10.

[0057] (Device configuration example) Next, examples of the configuration of devices that make up the wireless communication system will be described. Each of the following examples shows in detail the configuration of devices that are particularly involved in the operation of selecting a wireless communication method.

[0058] <Configuration example corresponding to operation example 1 (Configuration example 1)> FIG. 6 shows configuration example 1, which is a configuration example in operation example 1 (terminal device 20 selects a wireless communication method).

[0059] As shown in FIG. 6, the control device 100 in the first configuration example includes a communication unit 110, an external input / output unit 120, a calculation processing unit 130, an information acquisition unit 140, an information calculation unit 150, and a DB (database) 160.

[0060] The communication unit 110 connects to a network and performs information communication. The external input / output unit 120 passes information received via the communication unit 110 to the arithmetic processing unit 130, and also outputs information received from the arithmetic processing unit 130 to the outside via the communication unit 110.

[0061] The arithmetic processing unit 130 stores information in the DB 160, reads information from the DB 160, and so on.

[0062] The information acquisition unit 140 acquires information from the outside via the communication unit 110, the external input / output unit 120, etc. For example, the information acquisition unit 140 acquires, from each base station device 10 under the control of the control device 100, information on the wireless communication method supported by that base station device 10. The information acquisition unit 140 can also acquire capability information of each terminal device 20 from each base station device 10 under the control of the control device 100.

[0063] The information calculation unit 150 calculates information on wireless communication method characteristics based on information related to the wireless communication method acquired from each base station device 10, and stores the calculated information in the DB 160. The information calculation unit 150 can also calculate communication requirement characteristics of each terminal device 20 based on capability information of each terminal device 20, and store the calculated communication requirement characteristics in the DB 160.

[0064] In addition, without using the information calculation unit 150, the information acquisition unit 140 may acquire the wireless communication method characteristics for each wireless communication method and the communication requirement characteristics for each terminal device 20 from the outside, and store this acquired information in the DB 160.

[0065] Furthermore, when an external request is received to acquire information such as wireless communication system characteristics for each wireless communication system, for example, the arithmetic processing unit 130 reads the information from the DB 160 and transmits the information to the outside.

[0066] The terminal device 20 includes a wireless communication unit 21, a selection unit 22, and an information acquisition unit 23. The wireless communication unit 21 communicates wirelessly with the base station device 10. The information acquisition unit 23 acquires information required for selecting a wireless communication method (wireless communication method characteristics for each wireless communication method, communication requirement characteristics of the terminal device 20) from the control device 100. Furthermore, if the terminal device 20 holds the communication requirement characteristics of the terminal device 20 in a storage unit such as a memory, the information acquisition unit 23 acquires the communication requirement characteristics from the storage unit.

[0067] The selection unit 22 selects (determines) a wireless communication method to which the terminal device 20 is to connect, based on the information acquired by the information acquisition unit 23. The selection method is as described above. That is, the selection unit 21 calculates, for each wireless communication method, the inner product of a first vector whose elements are values ​​of items that configure the wireless communication method characteristics and a second vector whose elements are values ​​of items that configure the communication requirement characteristics, and selects a wireless communication method that should be supported by the base station device 10 to which the terminal device 20 is to connect, based on the magnitude of the inner product for each wireless communication method.

[0068] <Configuration example corresponding to operation example 2 (Configuration example 2)> 7 shows Configuration Example 2, which is a configuration example in Operation Example 2 (base station device 10 selects a wireless communication method). The configuration of the control device 100 in Configuration Example 2 is the same as the configuration of the control device 100 in Configuration Example 1. As for base station device 10, base station devices 10A and 10B have the same configuration, the following description will be given without distinguishing between A and B.

[0069] The base station device 10 includes a communication unit 11, a terminal accommodation control unit 12, an information acquisition unit 13, a wireless communication unit 14, and a selection unit 15. The communication unit 11 performs information communication via a network. The wireless communication unit 14 communicates wirelessly with the terminal device 20. The information acquisition unit 13 acquires information required for selecting a wireless communication method (wireless communication method characteristics for each wireless communication method, communication requirement characteristics of the terminal device 20) from the control device 100. Furthermore, if the terminal device 20 stores the communication requirement characteristics of the terminal device 20 in a storage unit such as a memory, the information acquisition unit 13 acquires the communication requirement characteristics from the terminal device 20.

[0070] The terminal accommodation control unit 12 receives a connection request from the terminal device 20 and performs control for accommodating the terminal device 20, such as returning a response signal to the terminal device 20. The response signal may be a "command instructing to connect to the base station device 10 of the selected wireless communication method," as described above.

[0071] The selection unit 15 selects (determines) a wireless communication method to which the terminal device 20 is to connect, based on the information acquired by the information acquisition unit 13. The selection method is as described above. That is, the selection unit 15 calculates, for each wireless communication method, the inner product of a first vector whose elements are values ​​of items that configure the wireless communication method characteristics and a second vector whose elements are values ​​of items that configure the communication requirement characteristics, and selects a wireless communication method that should be supported by the base station device to which the terminal device 20 is to connect, based on the magnitude of the inner product for each wireless communication method.

[0072] <Configuration example corresponding to operation example 3 (Configuration example 3)> FIG. 8 shows a configuration example 3 in the operation example 3 (the control device 100 selects the wireless communication method).

[0073] The configuration of the control device 100 in Configuration Example 3 is a configuration in which a selection unit 170 is added to the configuration of the control device 100 in Configuration Examples 1 (and 2). The configuration of the base station device 10 is a configuration in which the selection unit 15 is removed from the configuration of the base station device 10 in Configuration Example 2.

[0074] In the control device 100, the information acquisition unit 140 acquires information required for selecting a wireless communication method (wireless communication method characteristics for each wireless communication method, and communication requirement characteristics of the terminal device 20) from the DB 160. Furthermore, if the terminal device 20 holds the communication requirement characteristics of the terminal device 20 in a storage unit such as a memory, the information acquisition unit 140 acquires the communication requirement characteristics from the terminal device 20.

[0075] The selection unit 170 selects (determines) a wireless communication method to which the terminal device 20 is to connect, based on the information acquired by the information acquisition unit 140. The selection method is as described above. That is, the selection unit 170 calculates, for each wireless communication method, the inner product of a first vector whose elements are values ​​of items constituting the wireless communication method characteristics and a second vector whose elements are values ​​of items constituting the communication requirement characteristics, and selects a wireless communication method that should be supported by the base station device to which the terminal device 20 is to connect, based on the magnitude of the inner product for each wireless communication method. The selection unit 170 notifies the base station device 10 of the selected wireless communication method. The base station device 10 transmits to the terminal device 20 a "command to connect to the base station device 10 of the selected wireless communication method."

[0076] (Example of hardware configuration) The terminal device 20, the base station device 10, and the control device 100 can all be realized by, for example, causing a computer to execute a program. This computer may be a physical computer or a virtual machine on the cloud. Hereinafter, the "terminal device 20, the base station device 10, and the control device 100" will be collectively referred to as "devices."

[0077] That is, the device can be realized by executing a program corresponding to the processing performed by the device using hardware resources such as a CPU and memory built into a computer. The program can be recorded on a computer-readable recording medium (such as a portable memory) and stored or distributed. The program can also be provided via a network such as the Internet or email.

[0078] Fig. 9 is a diagram showing an example of the hardware configuration of the computer. The computer in Fig. 9 includes a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, and the like, all of which are interconnected by a bus BS.

[0079] A program for realizing processing on the computer is provided by a recording medium 1001 such as a CD-ROM or a memory card. When the recording medium 1001 storing the program is set in the drive device 1000, the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000. However, the program does not necessarily have to be installed from the recording medium 1001, but may be downloaded from another computer via a network. The auxiliary storage device 1002 stores the installed program as well as necessary files, data, etc.

[0080] When an instruction to start a program is received, the memory device 1003 reads and stores the program from the auxiliary storage device 1002. The CPU 1004 implements the functions of the device in accordance with the program stored in the memory device 1003.

[0081] The interface device 1005 is used as an interface for connecting to a network, etc. The display device 1006 displays a GUI (Graphical User Interface) etc. according to a program. The input device 1007 is composed of a keyboard, mouse, buttons, a touch panel, etc., and is used to input various operation instructions. The output device 1008 outputs the calculation results.

[0082] It should be noted that the device may not include any one, more, or all of the display device 1006, the input device 1007, and the output device 1008.

[0083] (Summary of the embodiment and its effects) As described above, the technology according to the present embodiment enables a base station device to be selected as a connection destination for a wireless communication method based on wireless communication method characteristics compiled in advance for each wireless communication method and the communication requirement characteristics of the terminal device itself. This makes it possible to select a wireless communication method that meets the communication requirements of the terminal device while taking into consideration the communication characteristics of each wireless communication method in a wireless communication system that uses multiple wireless communication methods. Furthermore, it is possible to obtain the expected communication quality and make it easier to meet the communication requirements.

[0084] (Addendum) This specification discloses at least the following wireless communication system, terminal device, base station device, control device, and wireless communication system selection method. (Additional note 1) Memory and at least one processor coupled to said memory; Including, The processor: Acquire wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; Calculating an inner product of a first vector whose elements are values ​​of items constituting wireless communication system characteristics and a second vector whose elements are values ​​of items constituting communication requirement characteristics for each wireless communication system, and selecting a wireless communication system to which the terminal device is to be connected based on the magnitude of the inner product for each wireless communication system. Wireless communication system. (Additional note 2) The processor selects a wireless communication system corresponding to a maximum inner product among the inner products of the wireless communication systems as a wireless communication system to which the terminal device is to be connected. Item 1. A wireless communication system according to claim 1. (Additional note 3) The wireless communication system of the connection destination of the terminal device includes a plurality of wireless communication systems. 3. The wireless communication system according to claim 1 or 2. (Additional note 4) A terminal device in a wireless communication system including a base station device and a terminal device, Memory and at least one processor coupled to said memory; Including, The processor: Acquire wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; Calculating an inner product of a first vector whose elements are values ​​of items constituting wireless communication system characteristics and a second vector whose elements are values ​​of items constituting communication requirement characteristics for each wireless communication system, and selecting a wireless communication system to which the terminal device is to be connected based on the magnitude of the inner product for each wireless communication system. Terminal device. (Additional note 5) A base station device in a wireless communication system including a base station device and a terminal device, Memory and at least one processor coupled to said memory; Including, The processor: Acquire wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; Calculating an inner product of a first vector whose elements are values ​​of items constituting wireless communication system characteristics and a second vector whose elements are values ​​of items constituting communication requirement characteristics for each wireless communication system, and selecting a wireless communication system to which the terminal device is to be connected based on the magnitude of the inner product for each wireless communication system. Base station equipment. (Additional note 6) A control device that controls a wireless communication system including a base station device and a terminal device, Memory and at least one processor coupled to said memory; Including, The processor: Acquire wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; Calculating an inner product of a first vector whose elements are values ​​of items constituting wireless communication system characteristics and a second vector whose elements are values ​​of items constituting communication requirement characteristics for each wireless communication system, and selecting a wireless communication system to which the terminal device is to be connected based on the magnitude of the inner product for each wireless communication system. Control device. (Additional note 7) A wireless communication system selection method executed by one or more computers constituting a wireless communication system, an information acquisition step of acquiring wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; a selection step of calculating, for each wireless communication system, an inner product of a first vector whose elements are values ​​of items constituting wireless communication system characteristics and a second vector whose elements are values ​​of items constituting communication requirement characteristics, and selecting, based on the magnitude of the inner product for each wireless communication system, a wireless communication system to which the terminal device is to be connected; A wireless communication system selection method comprising:

[0085] Although the present embodiment has been described above, the present invention is not limited to such a specific embodiment, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. [Explanation of symbols]

[0086] 10 Base station equipment 11 Communications Department 12 Terminal accommodation control unit 13 Information acquisition department 14. Radio Communication Section 15 Selection section 20 Terminal equipment 21 Radio Communication Department 22 Selection section 23 Information Acquisition Department 100 control device 110 Communications Department 120 External input / output section 130 Processing unit 140 Information Acquisition Department 150 Information Calculation Unit 160 DB 170 Selection Section 1000 Drive Device 1001 Recording media 1002 Auxiliary storage device 1003 Memory device 1004 CPU 1005 Interface device 1006 Display device 1007 Input Device 1008 Output Device

Claims

1. an information acquisition unit that acquires wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; a selection unit that calculates, for each wireless communication system, an inner product of a first vector whose elements are values ​​of items configuring wireless communication system characteristics and a second vector whose elements are values ​​of items configuring communication requirement characteristics, and selects N wireless communication systems corresponding to the largest N inner products (N is an integer of 2 or more) among the inner products calculated for each wireless communication system, as wireless communication systems to which the terminal device will simultaneously connect; A wireless communication system comprising:

2. The plurality of items constituting the wireless communication method characteristics includes an item of resistance to radio wave shielding, the value of which indicates whether or not there is resistance to radio wave shielding, and the plurality of items constituting the communication requirement characteristics includes an item of resistance to radio wave shielding, the value of which indicates whether or not resistance to radio wave shielding is required.

10. The wireless communication system of claim 1.

3. A terminal device in a wireless communication system including a base station device and a terminal device, an information acquisition unit that acquires wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; a selection unit that calculates, for each wireless communication system, an inner product of a first vector whose elements are values ​​of items configuring wireless communication system characteristics and a second vector whose elements are values ​​of items configuring communication requirement characteristics, and selects N wireless communication systems corresponding to the largest N inner products (N is an integer of 2 or more) among the inner products calculated for each wireless communication system, as wireless communication systems to which the terminal device will simultaneously connect; A terminal device comprising:

4. A base station device in a wireless communication system including a base station device and a terminal device, an information acquisition unit that acquires wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; a selection unit that calculates, for each wireless communication system, an inner product of a first vector whose elements are values ​​of items configuring wireless communication system characteristics and a second vector whose elements are values ​​of items configuring communication requirement characteristics, and selects N wireless communication systems corresponding to the largest N inner products (N is an integer of 2 or more) among the inner products calculated for each wireless communication system, as wireless communication systems to which the terminal device will simultaneously connect; A base station device comprising:

5. A control device that controls a wireless communication system including a base station device and a terminal device, an information acquisition unit that acquires wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; a selection unit that calculates, for each wireless communication system, an inner product of a first vector whose elements are values ​​of items configuring wireless communication system characteristics and a second vector whose elements are values ​​of items configuring communication requirement characteristics, and selects N wireless communication systems corresponding to the largest N inner products (N is an integer of 2 or more) among the inner products calculated for each wireless communication system, as wireless communication systems to which the terminal device will simultaneously connect; A control device comprising:

6. A wireless communication system selection method executed by one or more computers constituting a wireless communication system, an information acquisition step of acquiring wireless communication system characteristics for each wireless communication system and communication requirement characteristics of the terminal device; a selection step of calculating, for each wireless communication system, an inner product of a first vector whose elements are values ​​of items constituting wireless communication system characteristics and a second vector whose elements are values ​​of items constituting communication requirement characteristics, and selecting, from among the inner products calculated for each wireless communication system, N wireless communication systems corresponding to the largest N inner products (N is an integer of 2 or more) in magnitude as wireless communication systems to which the terminal device will simultaneously connect; A wireless communication system selection method comprising:

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