JP2020136961A - Network control device and control method - Google Patents

Abstract

To provide a network control device and a control method that improve line quality.SOLUTION: A network control device (orchestrator) for controlling a terminal device that makes contract and can connect with a plurality of communication carriers includes: an own-company line quality collection functional unit for collecting line quality information for a base station from the terminal device; a memory for storing a correspondence table representing a relationship between the line quality information on each of the plurality of base stations and the number of terminals connected to each of the plurality of base stations; a line quality prediction functional unit for acquiring from the correspondence table line quality information for the base station and the line quality information for another base station when the terminal device switches connection from the base station to the other base station for all combinations in which the terminal station connects and can connect to other base stations; and a connection destination switching instruction functional unit for transmitting a connection switching instruction to instruct switching to another base station of a combination having the highest line quality information to the terminal device.SELECTED DRAWING: Figure 4

Description

The present invention relates to a network control device and a control method.

Conventionally, there is a communication system by MVNO (Mobile Virtual Network Operator). For example, MVNO provides various services to users by using wireless communication line equipment owned by MNO (Mobile Network Operator) without opening and operating wireless communication line equipment by itself. It is a business operator. A user (or terminal) who has a contract with an MVNO has an advantage that it can be used at a low price as compared with a user who has a contract with an MNO, for example, because the number of types of services to be provided is small. The MVNO and the MNO may be collectively referred to as, for example, a telecommunications carrier, a carrier, or an operator.

On the other hand, in recent years, eSIM (embedded Subscriber Identify Module) is also attracting attention. The eSIM is, for example, a rewritable SIM pre-embedded in a terminal device. With eSIM, the user can switch from the virtual mobile network operator A to the virtual mobile network operator B and receive the service operated by the virtual mobile network operator B without replacing the SIM card. It becomes. Alternatively, the user can select one from a plurality of telecommunications carriers with one SIM card.

As a technique related to such a communication system, for example, there are the following. That is, among the wireless systems whose wireless link quality is Q1 or higher and whose flag F1 is set to ON, there are wireless terminals that are selected and connected in descending order of priority.

According to this technology, the handover between wireless systems is stabilized according to the connection policy information such as the priority of the wireless system set by the user and the condition for enabling / disallowing automatic connection, and the quality of the wireless link with each wireless system. It is said that it can be realized.

There are also network nodes that perform QoE measurements to obtain information about the QoE (Quality of Experience) experienced by the terminal device with respect to the application session and perform one or more actions based on the QoE measurements. .. An example of such an action is Wi-Fi offload.

Further, there is a management device for switching between the connection of the first terminal and the connection of the second terminal as follows, based on the comparison result of the communication quality information of the first terminal and the second terminal. That is, the connection of the first terminal connected to the base station of the first network and contracted with the first operator is switched to the switching destination candidate base station of the second network. Further, the connection of the second terminal connected to the base station of the second network and contracted with the second operator is switched to the switching destination candidate base station of the first network.

According to this technology, while maintaining consistency among a plurality of operators, the plurality of operators can efficiently use their own wireless resources, and high performance is achieved in the terminal to be switched and other terminals existing in the same area. It is said that it can be maintained.

Japanese Unexamined Patent Publication No. 2004-304399 Special Table 2018-506199 JP-A-2017-38216

The above-mentioned technology switches a wireless system or an operator based on the communication quality or the perceived quality of a certain terminal, or performs Wi-fi offload. Therefore, for example, when a plurality of operators provide services in a certain area, even if the connection is switched from one operator to another, the number of connected terminals increases at the switching destination operator, and the throughput decreases. May be done. On the other hand, in the switching source operator, the number of connected terminals decreases, so that the throughput may increase.

However, in some areas, the number of connected terminals may increase and the throughput may decrease, or the number of connected terminals may decrease and the throughput may increase, but the overall throughput may decrease. is there.

Therefore, one disclosure is to provide a network control device and a control method for improving line quality.

One disclosure is a terminal device that can switch the connection with a base station device operated by a plurality of communication carriers, and is a network control device that controls the terminal device contracted with the communication carrier. The line quality collecting unit that collects the line quality information for the base station device to which the terminal device is connected is connected to each of the line quality information of the plurality of base station devices and each of the plurality of base station devices. For all combinations of a memory that stores a correspondence table showing the relationship with the number of terminals, the base station device to which the terminal device is connected, and other base station devices to which the terminal device can be connected from the base station device. On the other hand, the line quality information for the base station device and the line quality information for the other base station device when the terminal device switches the connection from the base station device to the other base station device are provided in the terminal device. Based on the line quality information collected from the above, the line quality prediction unit acquired from the corresponding table and the connection switching instruction for instructing the switching of the connection to the other base station apparatus having the highest line quality information are issued. , A connection destination switching instruction unit for transmitting to the terminal device is provided.

According to one disclosure, it is possible to improve the line quality.

FIG. 1 is a diagram showing a configuration example of a communication system. FIG. 2 is a diagram showing a configuration example of a communication system. FIG. 3 is a diagram showing a configuration example of a terminal device. FIG. 4 is a diagram showing a configuration example of an orchestrator. FIG. 5 is a diagram showing an example of a corresponding table. 6 (A) and 6 (B) are diagrams showing examples of throughput for each carrier. 7 (A) and 7 (B) are diagrams showing examples of throughput for each carrier. 8 (A) and 8 (B) are diagrams showing examples of throughput for each carrier. FIG. 9 is a flowchart showing an operation example. FIG. 10 is a flowchart showing an operation example of the average throughput calculation process. FIG. 11 is a diagram showing an example of estimating the number of terminals connected to each base station. FIG. 12 is a diagram showing an example of estimating throughput when the number of terminals is reduced by one from the connection source base station. FIG. 13 is a diagram showing an example of estimating throughput when the number of terminals is increased by one at the connected base station. FIG. 14 is a flowchart showing another operation example.

Hereinafter, modes for carrying out the present invention will be described. The following examples do not limit the disclosed technology. Then, each embodiment can be appropriately combined as long as the processing contents do not contradict each other.

[First Embodiment]
<Configuration example of information processing system>
FIG. 1 is a diagram showing a configuration example of the communication system 10.

The communication system 10 is a terminal device (hereinafter, may be referred to as a "terminal") 100-11 to 100-13, 100-21 to 100-23, 100-31 to 100-33, and a base station device (hereinafter referred to as "terminal"). Then, it may be referred to as a "base station".) 200-1 to 200-4 and GW (Gateway) 300-1 to 300-3 are provided. Further, the communication system 10 may be referred to as a vGW (Virtual Gateway) 400-1 to 400-3, 500-1 to 500-3, and an orchestrator (or a network control device, hereinafter, an "orchestrator". ) 600-1,600-3.

Terminals 100-11 to 100-13 are, for example, terminals belonging to company # 1. Specifically, the terminals 100-11 to 100-13 are terminals capable of receiving services from the MVNO (for example, MVNO # 1) contracted by the company # 1. This MVNO is, for example, one of the wireless line equipment operated by the mobile carrier (hereinafter, may be referred to as “carrier”) A, the wireless line equipment operated by the carrier B, and the wireless line equipment operated by the carrier C. It is a business operator that can provide services to terminals 100-11 to 100-13 by using the unit. Therefore, the terminals 100-11 to 100-13 are connected to the base station 200-1 operated by the carrier A, the base stations 200-2 and 200-3 operated by the carrier B, and the base station 200-4 operated by the carrier C. It is possible to do. Therefore, for example, the terminals 100-11 to 100-13 are provided with an eSIM inside, and the contents of the SIM card can be rewritten to switch the connection destination base stations 200-1 to 200-4. There is.

Terminals 100-21 to 100-23 are, for example, terminals belonging to company # 2. Specifically, the terminals 100-21 to 100-23 are terminals capable of receiving services from the MVNO (for example, MVNO # 2) contracted by the company # 2. This MVNO can also provide services to terminals 100-21 to 100-23 by using a part of the wireless line equipment of each carrier A to C. Therefore, the terminals 100-21 to 100-23 also have an eSIM inside, and by rewriting the contents of the SIM card, the connection destinations of the base stations 200-1 to 200-4 can be changed from the base station 200-1 to the base station. It is possible to switch to 200-2, etc.

Terminals 100-31 to 100-33 are, for example, terminals belonging to company # 3. Specifically, the terminals 100-31 to 100-33 are terminals capable of receiving services from the MVNO (for example, MVNO # 3) contracted by the company # 3. This MVNO is also a business operator capable of providing services by using a part of the wireless line equipment of each mobile carrier A to C. Therefore, the terminals 100-31 to 100-33 also have an eSIM inside, and the connected base station can be switched from the base station 200-1 to the base station 200-3 by rewriting the contents of the SIM card. Is.

The terminals 100-11 to 100-13, 100-21 to 100-23, 100-31 to 100-33 can be wirelessly communicated with, for example, feature phones, smartphones, tablet terminals, personal computers, game devices, and the like. It is a wireless communication device.

Further, the terminal 100-11 to 100-13, 100-21 to 100-23, 100-31 to 100-33 may be referred to as a terminal 100.

Base stations 200-1 to 200-4 are wireless communication devices capable of providing various services such as a call service and a Web browsing service to terminals 100 in the area where the service can be provided. ..

The GWs 300-1 to 300-3 are, for example, communication devices that relay between the mobile network operated by the carriers A to C and the external network.

In the example of FIG. 1, the base station 200-1 and the GW300-1 are operated by the carrier A, and the base stations 200-2, 200-3 and the GW300-2 are operated by the carrier B, and the base station 200- 4 and GW300-3 are operated by carrier C. Each carrier A to C is, for example, a different MNO.

The vGW 400-1 to 400-3 transmits, for example, packet data transmitted from the vGW 500-1 to 500-3 to any one of the GWs 300-1 to 300-3. Further, the vGW 400-1 to 400-3 transmits, for example, packet data transmitted from the GW 300-1 to 300-3 to any one of the vGW 500-1 to 500-3. Such transmission control is performed by, for example, orchestrator 600-1, 600-3. For example, the vGW400-1 is subjected to such transmission control by the orchestrator 600-1, and the vGW400-3 is subjected to such transmission control by the orchestrator 600-3.

The vGWs 500-1 to 500-3 are, for example, communication devices that relay between the corporate network and the external network. Further, the vGW 500-4 is, for example, a communication device that relays between a cloud network and an external network. For example, the vGW500-1 is controlled by the orchestrator 600-1, and the vGW500-3 is controlled by the orchestrator 600-3.

The orchestrator 600-1, 600-3 is, for example, a network control device that controls transmission of packet data and the like exchanged between each corporate network and each corporate network. Therefore, the orchestrator 600-1,600-3 selects a carrier that satisfies a certain requirement (or an optimum requirement) based on, for example, the degree of delay or line speed, and utilizes the selected carrier. It is possible to provide a service to the terminal 100.

The orchestrator 600-1 shown in FIG. 1 controls transmission to company # 1, and the orchestrator 600-3 controls transmission to company # 3. Therefore, the orchestrator 600-1 controls the transmission of packet data and the like to the company # 1 by controlling the vGW400-1,500-1, and the orchestrator 600-3 controls the vGW400-3,500-3. By controlling, transmission control for company # 3 is performed.

In the first embodiment, the orchestrator 600-1,600-3 controls the connection of terminals 100-11 to 100-13, 100-31 to 100-33 belonging to, for example, companies # 1 and # 3. It is possible to do. Details will be described in the operation example.

FIG. 2 is a simplified configuration example of the communication system 10 shown in FIG.

In FIG. 2, similarly to FIG. 1, the base stations 200-11 to 200-13 of carriers A to C are arranged in the same area. The same area is, for example, the same area in front of a certain station, the same area in a certain town or city, and the like.

In the example of FIG. 2, terminals 100-11 to 100-16 represent an example of a terminal belonging to a certain company, and other terminals 100-21 to 100-25 represent an example of a terminal belonging to another company. There is. For example, in the following, terminals 100-11 to 100-16 may be referred to as in-house terminals, and terminals 100-21 to 100-25 may be referred to as other companies' terminals.

As shown in FIG. 2, in the in-house terminals 100-11 to 100-16, transmission control and the like are managed by the orchestrator 600, and connection control is performed by the orchestrator 600.

The terminals 100-21 to 100-25 of other companies may be, for example, terminals belonging to one company or terminals belonging to a plurality of companies. In the case of a plurality of companies, for example, terminals 100-21 to 100-23 may belong to another company A, and terminals 100-24, 100-25 may belong to another company B.

Further, in the example of FIG. 2, the base station 200-11 is a base station operated by the carrier A, the base station 200-12 is a base station operated by the carrier B, and the base station 200-13 is a base station operated by the carrier C. The MVNO that provides the service to the company uses a part of the wireless line equipment of each base station 200-11 to 200-13 operated by different MNOs to provide the service to the terminals 100-11 to 100-16. It is possible to provide. In this case, as described in FIG. 1, the terminals 100-11 to 100-16 switch the connection destination base station, such as from the carrier A base station 200-1 to the carrier B base station 200-2. It is possible to receive services from the switching destination base station.

Hereinafter, the communication system 10 shown in FIG. 2 will be described as an example. In addition, the company's terminal 100-11 to 100-16 may be referred to as a terminal 100. In addition, base stations 200-11 to 200-13 (or base stations 200 to 1 to 200-4) may be referred to as base station 200.

<Configuration example of terminal device>
FIG. 3 is a diagram showing a configuration example of the terminal 100.

The terminal 100 is, for example, a terminal device capable of receiving services provided by an MVNO contracted with the company.

The terminal 100 includes a control unit 110, a communication unit 120, a memory 130, and an eSIM 140.

The control unit 110 has a line quality collection function unit (hereinafter, may be referred to as a “line quality collection unit”) 111 and a connection information collection function unit (hereinafter, may be referred to as a “connection information collection unit”). It includes 112 and a connection destination rewriting function unit (hereinafter, may be referred to as a “connection destination rewriting unit”) 113.

The line quality collecting unit 111 collects the line quality of the wireless line with the base station 200 to be connected. For example, the line quality collecting unit 111 may measure the reception strength, reception power, and the like of the signal transmitted from the connection destination base station 200. Further, for example, the line quality collecting unit 111 may measure the number of bits per unit time of the data transmitted from the connection destination base station 200. The number of bits of data that can be transmitted and received per unit time may be referred to as, for example, throughput. Therefore, the line quality includes, for example, reception strength, reception power, and throughput.

The line quality collecting unit 111 transmits the collected line quality together with the identification information of the own terminal to the orchestrator 600 via the communication unit 120 or the like.

The connection information collecting unit 112 collects information on the base station 200 to which the terminal 100 is connected. For example, when the terminal 100 connects to the base station 200, the connection information is collected by collecting the identification information of the base station 200 included in the signal transmitted from the base station 200. The connection information is, for example, identification information of the base station 200 to which the terminal 100 is currently connected.

The connection information collecting unit 112 transmits the collected connection information together with the identification information of the own terminal to the orchestrator 600 via the communication unit 120 or the like.

When the connection destination rewriting unit 113 receives a connection switching instruction from the orchestrator 600 via, for example, the communication unit 120 or the like, the connection destination rewriting unit 113 rewrites the information of the connection destination base station 200 to the eSIM 140 according to the received connection switching instruction. Instruct that.

The communication unit 120 communicates with the orchestrator 600 via the connection base station 200 or the like. For example, the communication unit 120 converts the line quality information and connection information output from the control unit 110 into wireless signals, and transmits the converted wireless signals to the connection base station 200. Further, for example, the communication unit 120 receives the wireless signal transmitted from the connection base station 200, extracts data and information such as a connection destination switching instruction from the received wireless signal, and controls the extracted data and information. Output to unit 110. At this time, the communication unit 120 can communicate with the base station 200 according to the information of the connection destination base station 200 stored in the eSIM 140.

The memory 130 is, for example, a memory capable of storing various data and information.

The eSIM 140 has a built-in SIM card, and rewrites the information about the base station stored in the SIM card to the information about the base station to which the connection is switched, according to the rewriting instruction from the connection destination rewriting unit 113, for example. By this rewriting, the terminal 100 can switch the connection from the base station 200-1 to the base station 200-2, for example.

As shown in FIG. 3, the terminal 100 further includes a CPU (Central Processing Unit) 150 and a DSP (Digital Signal Processor) 160.

The CPU 150 can realize the function of the control unit 110 by reading and executing the program stored in the memory 130, for example. The CPU 150 corresponds to, for example, the control unit 110 (or the line quality collection unit 111, the connection information collection unit 112, and the connection destination rewriting unit 113).

Further, the DSP 160 can realize the function of the communication unit 120 by, for example, instructing from the CPU 150. The DSP 160 corresponds to, for example, the communication unit 120.

The CPU 150 may be a processor or controller such as a DSP or FPGA (Field Programmable Gate Array) instead of the CPU. Further, the DSP 160 may also be a processor or controller such as a CPU or FPGA instead of the DSP.

<Example of orchestrator configuration>
FIG. 4 is a diagram showing a configuration example of the orchestrator 600.

The orchestrator 600 includes a communication unit 610, a control unit 620, and a memory 630.

The communication unit 610 communicates with the terminal 100 via the base station 200 or the like. For example, the communication unit 610 receives the line quality information, the connection information, and the like transmitted from the terminal 100, and outputs the received information to the control unit 620. Further, the communication unit 610 transmits a connection destination switching instruction or the like output from the control unit 620 to the terminal 100.

The control unit 620 is referred to as an in-house line quality collection function unit (hereinafter, may be referred to as a "line quality collection unit") 621 and a terminal number estimation function unit in the same area (hereinafter, a "terminal number estimation unit"). In some cases.) 622 is provided. Further, the control unit 620 includes a line quality prediction function unit (hereinafter, may be referred to as a "line quality prediction unit") 623 after the connection destination is changed, and a connection destination switching instruction function unit (hereinafter, "connection destination"). It may be referred to as a "switching instruction unit".) 624 is provided.

The line quality collection unit 621 collects line quality information transmitted from its own terminal 100. For example, the line quality collecting unit 621 collects line quality information transmitted from its own terminals 100-11 to 100-16 via the communication unit 610 and the like.

The terminal number estimation unit 622 uses, for example, an average throughput correspondence table (hereinafter, may be referred to as a “correspondence table”) 631 stored in the memory 630, and the line quality information collected by the line quality collection unit 621. From, the number of terminals connected to each base station 200 is estimated. The number of terminals is the number of terminals obtained by adding the number of terminals of the company connected to the base station 200 and the number of terminals of other companies connected to the base station 200. The estimation method will be described with reference to an operation example.

The line quality prediction unit 623 confirms all combinations of the base station 200 to which the terminal 100 is connected and other base stations to which the terminal 100 can be connected from the base station 200.

For example, in the case of FIG. 2, the line quality prediction unit 623 uses a combination of carrier A base station 200-11 to carrier B base station 200-12 and carrier A base station 200-11 to carrier C base station 200. Check the combination of -13. Further, the line quality prediction unit 623 combines the combination of the carrier B base station 200-12 to the carrier A base station 200-11 and the combination of the carrier B base station 200-12 to the carrier C base station 200-13. Confirm. Further, the line quality prediction unit 623 combines the combination of the carrier C base station 200-13 to the carrier A base station 200-11 and the combination of the carrier C base station 200-13 to the carrier B base station 200-12. Confirm.

Then, the line quality prediction unit 623 performs the following processing for all combinations, for example.

That is, the line quality prediction unit 623 determines the line quality for the base station 200-11 when the terminal 100 switches the connection from the base station 200-11 of the carrier A to the base station 200-12 of the carrier B, and the base station 200-. The line quality for 12 is estimated from the correspondence table 631. Further, the line quality prediction unit 623 transfers the line quality to the base station 200-11 when the terminal 100 switches the connection from the base station 200-11 of the carrier A to the base station 200-13 of the carrier C, and the base station 200-. The line quality for 13 is estimated from the correspondence table 631.

For other combinations, the line quality prediction unit 623 estimates the line quality for the switching source base station and the line quality for the switching destination base station by using the correspondence table 631.

As a result, the line quality prediction unit 623 determines the line quality for the connection source base station 200 and the connection destination when it is assumed that the connection destination of the terminal 100 is switched from the connection source base station 200 to the connection destination base station 200. It is possible to estimate the line quality for the base station 200. The estimation method will be described in an operation example.

The connection destination switching instruction unit 624 selects one combination that maximizes the line quality from the line quality for all the combinations acquired by the line quality prediction unit 623. Then, the connection destination switching instruction unit 624 transmits a connection switching instruction instructing to switch the connection to the base station 200 to be the switching destination included in the selected combination to the terminal 100 via the communication unit 610 or the like. .. Details will be described in the operation example.

The memory 630 stores the corresponding table 631. There are a plurality of correspondence tables 631 for each base station 200, for example. In this case, for example, the correspondence table 631-1 is a correspondence table corresponding to the base station 200-1, and the correspondence table 631-2 is a correspondence table corresponding to the base station 200-2.

FIG. 5 is a diagram showing an example of the corresponding table 631. The correspondence table 631 shown in FIG. 5 is, for example, a correspondence table for a certain base station 200. In FIG. 5, the horizontal axis represents the number of terminals connected to the base station 200, and the vertical axis represents the throughput. In FIG. 5, throughput is taken as an example of line quality.

As shown in FIG. 5, in the correspondence table 631, when the number of terminals connected to the base station 200 is "1", the throughput is the largest, and the larger the number of terminals connected to the base station 200, the lower the throughput. To do.

The other base station 200 also has a corresponding table 631 having such a curve. However, since each base station has its own characteristics, such as a small rate of decrease in throughput even if the number of connected terminals is large, and an extremely decrease in throughput as the number of connected terminals increases, it is possible to support other base stations 200. The table 631 is a corresponding table 631 having a curve corresponding to its characteristics.

The correspondence table 631 is, for example, information held by each carrier. Therefore, it is assumed that the orchestrator 600 acquires such a correspondence table 631 in advance from each carrier and stores it in the memory 630, for example.

Returning to FIG. 4, the memory 630 stores, for example, a communication record 632 for the terminal 100.

As shown in FIG. 4, the orchestrator 600 further includes a DSP 640 and a CPU 650.

The CPU 650 can realize the function of the control unit 620 by reading and executing the program stored in the memory 630, for example. The CPU 650 corresponds to, for example, a control unit 620 (or a line quality collection unit 621, a terminal number estimation unit 622, a line quality prediction unit 623, and a connection destination switching instruction unit 624).

Further, the DSP 640 can realize the function of the communication unit 610 by, for example, instructing from the CPU 650. The DSP 640 corresponds to, for example, the communication unit 610.

The CPU 650 may be a processor or controller such as a DSP or FPGA (Field Programmable Gate Array) instead of the CPU. Further, the DSP 640 may also be a processor or controller such as a CPU or FPGA instead of the DSP.

In the following, throughput will be described as an example of line quality.

Further, in the following, connecting to a carrier and connecting to a base station 200 operated by the carrier may be used interchangeably.

Further, in the following, switching carriers and switching connections between base stations 200 operated by different carriers may be used interchangeably. For example, switching the connection from carrier A to carrier B and switching the connection from base station 200-1 operated by carrier A to base station 200-2 operated by carrier B may be used interchangeably. ..

<Operation example>
<1. First operation example>
6 (A) to 7 (B) are diagrams showing a first operation example.

In the first operation example, it is assumed that the terminal 100 connected to the carrier having the lowest throughput is switched to the carrier having the highest throughput by an algorithm.

In the example of FIG. 6A, there are in-house terminals 100-11 to 100-16, terminals 100-11, 100-12 are carriers A, terminals 100-13, 100-14 are carriers B, and terminals 100-15. Each of 100-16 is connected to carrier C. As in FIG. 2, each carrier A to C can provide a service within the same area.

In addition, "50" terminals 100-21 are connected to the carrier A as terminals of other companies. Further, "10" terminals 100-22 are connected to the carrier B as terminals of other companies. Further, "19" terminals 100-23 are connected to the carrier C as terminals of other companies.

Therefore, a total of "52" terminals are connected to the carrier A, a total of "12" terminals are connected to the carrier B, and a total of "21" terminals are connected to the carrier C. There is.

In this case, since the number of terminals connected to the carrier A is "52", the throughput of each "52" terminal is "89.9 Mbps". This is because in the base station 200 managed by the carrier A, when "1" units are connected, "110 Mbps" is connected, and when "10" units are connected, each terminal 100 is connected to "100 Mbps" and "50" units. At that time, each terminal 100 has a throughput of "90 Mbps". This relationship corresponds to the correspondence table 631 of the base station 200 in the carrier A. In the case of FIG. 6A, since "52" units are connected, for example, the throughput of each terminal 100 can be "89.9 Mbps". In the carrier A, the throughput of each terminal 100 is "89.9 Mbps".

However, the orchestrator 600 can obtain a numerical value close to "89.9 Mbps" from the connection information and the line quality information transmitted from the terminals 100-11 and 100-12 connected to the carrier A. Here, this throughput will be described as, for example, the accurate throughput measured by the carrier A.

Similarly, in the carrier B, since the number of connected terminals is "12", "90 Mbps" is obtained. Further, in the carrier C, since the number of connected terminals is "21", "88 Mbps" is obtained.

Here, it is assumed that the threshold value of the average throughput is "89.3 Mbps" in the company's terminals 100-11 to 100-16. The threshold value represents, for example, the minimum throughput for the terminal 100 to receive the service from the MVNO contracted by the company to receive the service. Therefore, the in-house terminals 100-11 to 100-16 can sufficiently receive the service when the average throughput of each terminal exceeds the threshold value, and cannot sufficiently receive the service when the average throughput of each terminal exceeds the threshold value. ..

In the example of FIG. 6A, the average throughput of all the in-house terminals 100-11 to 100-16 is "89.3 Mbps" (= (89.9 Mbps x 2 + 90 Mbps x 2 + 88 Mbps x 2) / 6). This average throughput does not exceed the threshold "89.3 Mbps". Therefore, the company's terminals 100-11 to 100-16 cannot receive sufficient services. Therefore, the connection of the terminals 100-11 to 100-16 is switched.

In this case, as described above, in the first operation example, the algorithm for switching the connection of the terminal 100 connected to the carrier having the lowest throughput to the carrier having the highest throughput is applied. In the example of FIG. 6B, the terminal 100-16 connected to the carrier C having the lowest throughput is switched to the carrier C having the highest throughput.

At this time, in carrier B, the number of connected terminals increased from "12" to "13", and in carrier C, the number of connected terminals decreased from "21" to "20". In carrier B, since the number of connected terminals was "13", the throughput was reduced to "85 Mbps", for example. On the other hand, in carrier C, the number of connected terminals reached "21", so the throughput increased to "90 Mbps". In this case, the average throughput of all the in-house terminals 100-11 to 100-16 is "87.4 Mbps" (≈ (89.9 Mbps x 2 + 85 Mbps x 3 + 88 Mbps x 1) / 6). This average throughput does not exceed the average throughput threshold "89.3 Mbps".

In this case, in the first operation example, as shown in FIGS. 7A and 7B, the connection is switched so as to return the terminal 100-16 to which the connection has been switched to the original state. That is, the terminal 100-16 is switched from the carrier B to the original carrier C. Then, in the end, the average throughput becomes "89.3 Mbps" as in FIG. 6 (A), and does not exceed the threshold value "89.3 Mbps".

As shown in the first operation example, even if the terminal 100-16 is switched from one carrier to another, the average throughput of all the in-house terminals 100 may not exceed the threshold value. Therefore, in the first operation example, it is not possible to maximize the radio wave efficiency.

For example, if the connection base station is switched in consideration of only the radio quality and the perceived quality of a certain terminal 100-16, the average throughput of the entire company terminal 100 is a threshold value in the entire region as in the first operation example. In some cases, the situation may not exceed.

Therefore, there is a second operation example shown below.

<2. Second operation example>
FIG. 8 is a diagram showing a second operation example.

FIG. 8 (A) is the same as FIG. 6 (A). That is, the number of terminals connected to the carrier A is "52", and in the carrier A, the throughput of each terminal 100 is "89.9 Mbps". Further, the number of terminals connected to the carrier B is "12", and in the carrier B, the throughput of each terminal 100 is "90 Mbps". Further, the number of terminals connected to the carrier C is "21", and in the carrier C, the throughput of each terminal 100 is "88 Mbps". The average throughput of the company's terminals 100-11 to 100-16 is "89.3 Mbps", which does not exceed the threshold value "89.3 Mbps".

In the second operation example, the orchestrator 600 obtains the throughput of each carrier A to C for each combination of all combinations of the connection source and the connection destination of the terminal 100, and calculates the overall average throughput. Then, the orchestrator 600 selects the combination that maximizes the average throughput.

In the example of FIG. 8A, as all combinations, carrier A to carrier B, carrier A to carrier C, carrier B to carrier A, carrier B to carrier C, carrier C to carrier A, and carrier. There are six combinations from C to carrier B. The orchestrator 600 obtains the throughput of each terminal in each carrier A to C for all of these combinations, and calculates the overall average throughput. Then, the orchestrator 600 selects the combination having the highest average throughput among these combinations. In the example of FIG. 8 (A), as shown in FIG. 8 (B), the orchestrator 600 selects this combination because the average throughput in the combination from carrier B to carrier A is the highest. The orchestrator 600 is one of the company's terminals connected to the carrier B. In the example of FIG. 8B, the orchestrator 600 is connected to the terminals 100-14 from the base station 200 of the carrier B to the base of the carrier C. Instruct the station 200 to switch. Then, as shown in FIG. 8B, the terminals 100-14 switch the connection to the base station 200 of the carrier A, and receive the service from the base station 200 of the carrier A.

In the example of FIG. 8B, the average throughput is “89.6 Mbps” (≈ (3 × 89 Mbps + 1 × 95 Mbps + 2 × 88 Mbps) / 6). In this case, by moving the terminal 100-14 from the carrier B to the carrier A, the average throughput of the in-house terminals 100-11 to 100-16 exceeds the threshold value.

Therefore, each in-house terminal 100-11 to 100-16 can increase the throughput on average, for example, as compared with that before the connection switching. Therefore, one terminal 100 uses more radio waves, another terminal 100 uses less radio waves, and the company's terminals 100-11 to 110-16 can use radio waves on average. Therefore, it is possible to maximize the utilization efficiency of radio waves.

In the second operation example, in the orchestrator 600, the throughput of each carrier A to C when it is assumed that the connection of the terminal 100 is switched is calculated (or estimated) by using the correspondence table 631. For details, see the following <3. A flowchart showing the second operation example> will be described.

<3. Flowchart showing the second operation example>
FIG. 9 is a flowchart showing a second operation example.

When the terminal 100 and the orchestrator 600 start processing (S10), the terminal 100 transmits the measured throughput and the identifier of the connected base station 200 to the orchestrator 600 at regular intervals (S11). For example, the terminal 100 performs the following processing.

That is, the line quality collecting unit 111 acquires the throughput based on the signal transmitted from the connection base station 200. In this case, the line quality collecting unit 111 may calculate the average throughput at a certain time interval and use this average value (or median value or the like) as the measured throughput or the instantaneous throughput measured. Further, the connection information collecting unit 112 extracts the identifier of the connection base station 200 from the signal transmitted from the connection base station 200. Then, the line quality collecting unit 111 transmits the measured throughput, and the connection information collecting unit 112 transmits the extracted identifier of the connected base station 200 to the orchestrator 600 via the communication unit 120 or the like.

In the example of FIG. 2, each company terminal 100-11 to 100-16 transmits the measured throughput and the identifier of the connected base station 200-11 to 200-13 to the orchestrator 600.

Returning to FIG. 9, the orchestrator 600 then calculates the line quality of the terminals 100 in the same area (S12).

For example, the line quality collection unit 621 calculates the average throughput of each terminal 100. Here, when the measurement throughput transmitted from the terminal 100 is the average throughput, the line quality collection unit 621 uses the measurement throughput as it is. When the instantaneous throughput is received as the measurement throughput, the line quality collecting unit 621 calculates the average throughput based on the plurality of instantaneous throughputs. Further, the line quality collecting unit 621 calculates, for example, a delay as the line quality. A known method may be used for calculating the delay. The line quality collecting unit 621 outputs the average throughput of each terminal 100 to the terminal number estimation unit 622.

For example, in the example of FIG. 8A, the line quality collecting unit 621 obtains a numerical value equal to or similar to “89.9 Mbps” from each terminal 100-11, 100-12 connected to the carrier A. It is possible. Further, the line quality collecting unit 621 can obtain a value similar to or similar to "90 Mbps" from each terminal 100-13, 100-14 connected to the carrier B. Further, the line quality collecting unit 621 can obtain a value similar to or similar to "88 Mbps" from each terminal 100-15, 100-16 connected to the carrier C. In such a case, the line quality collecting unit 621 can obtain a numerical value equal to or close to "89.3 Mbps" as the average throughput of the carriers A to C. In the following, in the example of FIG. 8A, it is assumed that “89.3 Mbps” is obtained as the in-house average throughput.

Next, the orchestrator 600 enumerates all the combination patterns to which the terminal 100 can be connected in the same area (S13).

For example, in the example of FIG. 8A, there are three carriers A to C in the same area. In this case, there are a total of 6 combinations such as carrier A to carrier B and carrier A to carrier C as all combinations. For example, the line quality collection unit 621 holds the identifiers of the base stations 200-11 to 200-13 of each carrier in the same area in the internal memory. Therefore, if the base station 200 in the same area that matches the received information of the identifier of the connected base station 200 is stored in the internal memory, the line quality collection unit 621 enumerates the combinations of all carriers in the area ( Or calculate).

Returning to FIG. 9, the orchestrator 600 then performs an average throughput calculation process (hereinafter, may be referred to as “average throughput calculation process”) of all the company's terminals (S14).

FIG. 10 is a flowchart showing an operation example of the average throughput calculation process.

When the orchestrator 600 starts the average throughput calculation process (S140), the orchestrator 600 estimates the number of terminals of each carrier other than its own using the correspondence table 631 (S141).

For example, in the example of FIG. 8A, the terminal number estimation unit 622 estimates the number of terminals of terminals 100-21 other than the company connected to the carrier A. Further, the terminal number estimation unit 622 estimates the number of terminals of terminals 100-22 other than the company connected to the carrier B. Further, the terminal number estimation unit 622 estimates the number of terminals of terminals 100-23 other than the company connected to the carrier C.

In FIG. 8A, the number of terminals other than the company's own is shown, and although such a number of terminals is held by each carrier, it is usually not disclosed to other carriers.

Therefore, in the first embodiment, the orchestrator 600 estimates the number of terminals connected to other than its own company for each carrier by using the corresponding table 631.

FIG. 11 is a diagram showing an example of a graph of the corresponding table 631. For example, the correspondence table 631 shown in FIG. 11 represents an example of the correspondence table 631 in the base station 200 of the carrier A. The horizontal axis represents the number of terminals, and the vertical axis represents throughput.

The terminal number estimation unit 622 performs the following processing, for example.

That is, the terminal number estimation unit 622 acquires the number of terminals of its own terminal connected to the carrier A from the line quality collection unit 621. In this case, the company terminal 100 transmits the identifier of the terminal and the identifier of the connected base station (S11). Therefore, the line quality collecting unit 621 acquires the number of terminals of its own terminal connected to the carrier A by counting the terminal identification information for each carrier based on the identifier of the terminal and the identifier of the connected base station. To do. It is assumed that the terminal number estimation unit 622 acquires, for example, "7" units from the line quality collection unit 621 as the number of terminals of its own terminal.

In this case, as shown in FIG. 11, the terminal number estimation unit 622 plots the average throughput acquired from the seven terminals 100 at the terminal number “7” in the corresponding table 631. In the example of FIG. 11, it is assumed that the average throughput can be plotted in the range (X).

Then, the terminal number estimation unit 622 searches the range of the graph of the corresponding table 631 that matches the range (X) of the average throughput. That is, the terminal number estimation unit 622 searches for a portion where the upper limit and the lower limit of the average throughput and the upper limit and the lower limit in the graph of the corresponding table 631 most match. In the example of FIG. 11, the range shown in (Y) is the search result.

The terminal number estimation unit 622 estimates that the portion of the searched range is the number of terminals connected to the carrier A. That is, in the example of FIG. 11, the terminal number estimation unit 622 estimates that "17", which is the number of terminals in the searched range (Y), is the number of terminals connected to the carrier A ((Z)). Therefore, the terminal number estimation unit 622 can estimate that "10" is the number of terminals other than the company connected to the carrier A, which is obtained by subtracting the number of own terminals "10" from the estimated number of terminals "17". it can.

The graph of FIG. 11 is stored in the internal memory of the terminal number estimation unit 622 for each carrier (or for each base station of each carrier), for example. The terminal number estimation unit 622 acquires the average throughput together with the identifier of the connected base station 200 from the line quality collection unit 621 by reading the corresponding table 631 of the base station 200 that matches the identifier from the internal memory. 200 corresponding tables can be read. Then, the terminal number estimation unit 622 is connected to the base station 200, that is, the number of terminals (or the number of users) other than the company connected to each carrier, and is connected to each carrier by using the acquired correspondence table 631. The total number of terminals (or the total number of users) can be estimated. After that, the processing is performed using the total number of terminals.

For example, for other carriers (carrier B and carrier C), the terminal number estimation unit 622 estimates the number of terminals other than the company connected to each carrier in the same manner as described above using the corresponding table 631. The terminal number estimation unit 622 outputs the estimated number of terminals of each carrier to the line quality prediction unit 623.

The correspondence table 631 can be represented by, for example, the graph shown in FIG. 11, where the horizontal axis is the number of terminals and the vertical axis is the throughput. In the following, the correspondence table 631 and the graph may be used interchangeably.

Further, the upper limit of the number of terminals connected to each base station 200 may be set for the corresponding table 631. For example, when the same number of terminals as the upper limit is connected to one base station 200, the upper limit number of terminals 100 is used for the radio waves used by the base station 200, so that the radio wave utilization efficiency is not necessarily good. I can not say. Therefore, when the number of connected terminals of a certain base station 200 reaches the upper limit value, the terminal number estimation unit 622 can process so as not to increase the number of terminals connected to such a base station 200.

Returning to FIG. 10, the orchestrator 600 then calculates the throughput of the connection source carrier when the number of its own terminals 100 is reduced by one from the connection source carrier for one of the combination patterns from the corresponding table 631. (S142). In other words, for example, the orchestrator 600 calculates the throughput of the connection source base station from the correspondence table 631 on the assumption that the connection is switched from the connection base station to another base station. For example, in the example of FIG. 8B, this process corresponds to the process of calculating the throughput of carrier B when the company terminal 100-14 switches the connection from carrier B to carrier A.

For example, the line quality prediction unit 623 acquires information on all patterns of the combination from the line quality collection unit 621, and for one of them, for example, a pattern from carrier B to carrier A, one of the company's terminals 100 from carrier B is used. Calculate the throughput of carrier B when the number of units is reduced.

FIG. 12 is a diagram showing an example of the correspondence table 631 in the base station 200 of the carrier B, and showing an example of a throughput calculation method when one carrier B is reduced.

For the orchestrator 600, for example, the throughput of the carrier B when one unit is reduced is calculated as follows.

That is, the terminal number estimation unit 622 estimated the total number of terminals connected to the carriers A to C in S141. In the example of FIG. 12, "12" units are estimated as the total number of terminals connected to the carrier B. Then, the line quality prediction unit 623 obtains a throughput of "90 Mbps" for the number of users "12". Then, the line quality prediction unit 623 obtains the throughput for the number of users "11" when the number of terminals is reduced from the corresponding table 631. In the example of FIG. 12, "95 Mbps" is obtained. That is, the line quality prediction unit 623 was able to obtain a throughput of "95 Mbps" when the number of its own terminals 100 connected to the carrier B decreased by one.

In this way, the line quality prediction unit 623 uses the corresponding table 631 to obtain the throughput when one unit is reduced from the estimated total number of terminals.

Returning to FIG. 10, the orchestrator 600 then calculates the throughput of the connection destination carrier when the number of its own terminals 100 is increased to the connection destination carrier from the corresponding table 631 (S143). In other words, for example, the orchestrator 600 calculates the throughput of the other base station from the corresponding table 631 assuming that the connection is switched from the connected base station to the other base station. For example, in the example of FIG. 8B, this process corresponds to the process of calculating the throughput of the carrier A when the company terminal 100-14 switches the connection from the carrier B to the carrier A.

FIG. 13 shows a graph of the correspondence table 631 in the carrier A, and is a diagram showing an example of a method of calculating the throughput of the carrier A when one carrier A is added.

The orchestrator 600 calculates the throughput of the carrier A when one is added as follows, for example.

That is, the line quality prediction unit 623 acquires the throughput of the carrier A from the correspondence table 631 with respect to the number of users "52" of the carrier A estimated by the terminal number estimation unit 622. In the example of FIG. 13, the line quality prediction unit 623 obtains a throughput of “89.9 Mbps” for the number of users “52”. Then, the line quality prediction unit 623 obtains the throughput for the number of users "53" when one unit is added from the correspondence table 631. In the example of FIG. 13, "89 Mbps" is obtained. That is, the line quality prediction unit 623 obtains a throughput "89 Mbps" when the number of its own terminals 100 connected to the carrier A increases by one.

In this way, the line quality prediction unit 623 uses the correspondence table 631 to obtain the throughput when the number of terminals is increased by one from the estimated total number of terminals.

Returning to FIG. 10, next, the orchestrator 600 calculates the average throughput of all the company's terminals assuming that one company's terminal 100 is switched and the connection is switched (S144). In this process, for example, in the example of FIG. 8B, it is assumed that the terminal 100-14 switches the connection from the carrier B to the carrier A, and the in-house terminals 100-11 to 100- connected to the carriers A to C. Corresponds to the process of calculating the average throughput of 16.

For example, the line quality prediction unit 623 calculates the average throughput by using the throughput calculated in S142 and S143. In the example of FIG. 8B, the line quality prediction unit 623 calculates 89.6 Mbps (≈ (89 Mbps × 3 + 95 Mbps × 1 + 88 Mbps × 2) / 6). “89 Mbps” corresponds to the numerical value calculated in S143 (FIG. 13), and “95 Mbps” corresponds to the numerical value calculated in S142 (FIG. 12).

Returning to FIG. 10, when the orchestrator 600 calculates the average throughput (S144), the orchestrator 600 ends the average throughput calculation process (S145).

Returning to FIG. 9, the orchestrator 600 then determines whether or not all the combination patterns have been calculated (S15). In the processing of S14, the orchestrator 600 focused on one of all the combinations and calculated the average throughput in that combination. In the second operation example, the orchestrator 600 calculates the average throughput for all the combination patterns in the same area calculated in S13, and in this process, whether or not the all combination patterns are calculated is determined. Judging.

For example, the line quality prediction unit 623 stores flag information in the internal memory for each and every combination in the same area calculated by the line quality collection unit 621, and when the average throughput is calculated in S14, the flag information is stored. turn on. The line quality prediction unit 623 may determine this process depending on whether or not the flag information of all combinations in the same area stored in the internal memory is turned on.

When the orchestrator 600 has not calculated all the combinations (No in S15), the orchestrator 600 calculates the average throughput for the uncalculated combinations (S14).

Then, when all the combinations are calculated (Yes in S15), the orchestrator 600 determines whether or not there is a combination with an improved average throughput (S16). For example, the line quality prediction unit 623 compares the average throughput calculated in S12 with the average throughput of each combination calculated in S14, and determines the average throughput calculated in S12 of at least one of the average throughputs of each combination. Determine if it exceeds.

When the orchestrator 600 determines that there is a combination having an improved average throughput (Yes in S16), the orchestrator 600 selects one combination having the maximum throughput (S17). For example, the line quality prediction unit 623 selects the combination having the maximum throughput among the average throughputs in each combination calculated in S14, which exceeds the average throughput calculated in S12. For example, in the example of FIG. 8B, the average throughput when the connection was switched from the carrier B to the carrier A was the largest among the combinations of all 6 patterns. Therefore, the line quality prediction unit 623 selects the combination from the carrier B to the carrier A. In this case, the line quality prediction unit 623 outputs the information of the selected combination to the connection destination switching instruction unit 624.

Next, the orchestrator 600 instructs the terminal 100 to rewrite the eSIM so as to switch the connection of the terminal 100 with the selected combination (S18). For example, in the example of FIG. 8B, the connection destination switching instruction unit 624 transmits an eSIM rewriting instruction to the terminals 100-14 to switch the connection from the base station of the carrier B to the base station of the carrier A. .. The rewrite instruction includes information on the base station of the connection source and information on the base station of the connection destination.

Upon receiving the rewrite instruction, for example, the connection destination rewriting unit 113 rewrites the information of the connection source base station stored in the SIM card of the eSIM 140 to the information of the connection destination base station. As a result, in the example of FIG. 8B, the terminal 100-14 can switch the connection destination from the base station of the carrier B to the base station of the carrier A.

Returning to FIG. 9, when the orchestrator 600 instructs the rewriting of the eSIM 140, the orchestrator 600 shifts to S11 and repeats the above-described processing.

On the other hand, when the average throughput for all the calculated combination patterns is not improved (No in S16), the orchestrator 600 ends a series of processes (S19). When no improvement is seen, the orchestrator 600 does not exceed the average throughput before switching (the average throughput calculated in S12) even if the connection is switched, so that a series of connections are not switched. End the process.

As described above, in the second operation example, the orchestrator 600 connects the terminals 100 by, for example, the combination that maximizes the average throughput based on the average throughput of each of the patterns of all combinations. I'm switching carriers. Therefore, if the connection carrier of the terminal 100 is switched in the combination that maximizes the average throughput, it is predicted that the throughput will be maximized. Therefore, in the second operation example, the throughput, that is, the line quality can be improved as compared with the case before the switching.

In the second operation example described above, an example in which the processes from S15 to S17 are performed by the line quality prediction unit 623 has been described. For example, the processes from S15 to S17 may be performed by the connection destination switching instruction unit 624. In this case, the connection destination switching instruction unit 624 acquires the average throughput (S14) for each combination from the line quality prediction unit 623, and acquires the information (S13) for all combinations from the line quality collection unit 621. The connection destination switching instruction unit 624 can determine the processing of S15 by storing the information of all combinations in the internal memory and storing the flag information in the internal memory every time the average throughput is acquired, for example. ..

Further, in the second operation example described above, the processing order of S142 and S143 may be reversed.

[Second Embodiment]
In the first embodiment, the orchestrator 600 uses the corresponding table 631 to estimate the number of terminals of each carrier other than its own (S141 in FIG. 10). For example, the orchestrator 600 acquires information about the corresponding table 631 of each base station 200 from each carrier and estimates the number of terminals based on the corresponding table 631. The second embodiment is an example in which each carrier is informed of the number of terminals connected to each carrier without using the correspondence table 631.

FIG. 14 is a flowchart showing an operation example according to the second embodiment.

When the orchestrator 600 starts the average throughput calculation process (S140), the orchestrator 600 is informed by another company of the number of connected terminals of each carrier, adds the number of connected units of each carrier of the company, and adds the number of connected terminals of the terminal 100 connected to each carrier. The total number of terminals (S147). For example, the terminal number estimation unit 622 receives the number of terminals of the connected terminals 100 transmitted from each base station 200 via the communication unit 610 and the like. In this case, when the number of terminals transmitted from each base station 200 is the number of terminals of all terminals including the company's terminal 100, the terminal number estimation unit 622 uses the number of received terminals as it is. On the other hand, when the number of terminals of the terminal number estimation unit 622 is the number of terminals other than the company terminal 100, the total number of terminals may be the sum of the number of received terminals and the number of terminals of the company terminal.

In the second embodiment, since the number of connected terminals of each carrier is directly taught, the average throughput is calculated in the orchestrator 600 as compared with the case of the first embodiment (S142 to S144). It is possible to improve the accuracy of.

The above can be summarized as an appendix.

(Appendix 1)
In a terminal device that can switch the connection with a base station device operated by a plurality of telecommunications carriers, and is a network control device that controls the terminal device contracted with the telecommunications carrier.
A line quality collecting unit that collects line quality information for the base station device to which the terminal device is connected from the terminal device,
A memory that stores a correspondence table showing the relationship between the line quality information of each of the plurality of base station devices and the number of terminals connected to each of the plurality of base station devices.
For all combinations of the base station device to which the terminal device is connected and the other base station device to which the terminal device can be connected from the base station device, the terminal device is connected to the other base station device. The line quality information for the base station device and the line quality information for the other base station device when the connection to the base station device is switched are obtained from the corresponding table based on the line quality information collected from the terminal device. The line quality prediction department to be acquired and
A network control device including a connection destination switching instruction unit that transmits a connection switching instruction for instructing switching of a connection to the other base station device having the highest line quality information to the terminal device. ..

(Appendix 2)
Furthermore, it is equipped with a terminal number estimation unit.
The terminal number estimation unit is used when the first and second terminal devices controllable by the network control device are connected to the base station device and the other base station device, respectively.
The number of terminals of the first terminal device contracted with the telecommunications carrier, which is connected to the base station device based on the line quality information collected from the first terminal device connected to the base station device. The first total number of terminals, which is the number of terminals of the terminal device not contracted with the telecommunications carrier, is acquired from the first correspondence table showing the correspondence relationship between the number of terminals in the base station device and the line quality information. ,
The second terminal contracted with the telecommunications carrier, which connects to the other base station device based on the line quality information collected from the second terminal device connected to the other base station device. The second total number of terminals, which is the number of terminals of the device and the number of terminals of the terminal device not contracted with the telecommunications carrier, is the second indicating the correspondence relationship between the number of terminals in the other base station device and the line quality information. Obtained from the corresponding table of
The line quality prediction unit acquires the line quality information for the base station apparatus from the first corresponding table based on the first total number of terminals, and based on the second total number of terminals, said The network control device according to Appendix 1, wherein the line quality information for another base station device is acquired from the second correspondence table.

(Appendix 3)
The line quality prediction unit acquires the line quality information when the first total number of terminals is set to "-1" from the first corresponding table, and sets the second total number of terminals to "+1". The network control device according to Appendix 2, wherein the line quality information is acquired from the second correspondence table.

(Appendix 4)
The line quality prediction unit or the connection destination switching instruction unit provides line quality information for the base station device and the other base station when the terminal device switches the connection from the base station device to the other base station device. Select the combination with the highest average line quality information for the device,
The network control device according to Appendix 1, wherein the connection destination switching instruction unit transmits a connection switching instruction instructing switching of a connection to the other base station device of the selected combination.

(Appendix 5)
The line quality collecting unit collects line quality information for the plurality of base station devices to which the plurality of terminal devices are connected, respectively, from the plurality of terminal devices.
For each of the all combinations, the line quality prediction unit provides line quality information for the base station device and the other base station when the terminal device switches the connection from the base station device to the other base station device. The network control device according to Appendix 4, wherein when the average of the line quality information for the device is higher than the average of the collected line quality information, the combination having the highest average is selected.

(Appendix 6)
The terminal device can switch the connection between the first base station device operated by the first telecommunications carrier and the second or third base station device operated by the second or third telecommunications carrier, respectively. And
The line quality collecting unit collects line quality information for the first base station device to which the terminal device is connected.
The correspondence table includes a first correspondence table showing the relationship between line quality information in the first base station apparatus and the number of terminals connected to the first base station apparatus, and a line in the second base station apparatus. A second correspondence table showing the relationship between the quality information and the number of terminals connected to the second base station apparatus, line quality information in the third base station apparatus, and terminals connected to the third base station apparatus. Includes a third correspondence table that represents the relationship with numbers
The line quality prediction unit includes the first line quality information for the first base station device when the terminal device switches the connection from the first base station device to the second base station device, and the line quality information. The second line quality information for the second base station device is acquired from the first and second corresponding tables, respectively, and the terminal device moves from the first base station device to the third base station device. The first line quality information for the first base station device and the third line quality information for the third base station device when the connection is switched are acquired from the first and third corresponding tables, respectively. And
The connection switching instruction unit is the most line quality information among the combination of the first line quality information and the second line quality information and the combination of the first line quality information and the third line quality information. The network control device according to Appendix 1, wherein a connection switching instruction for instructing connection to the second or third base station device in a high combination is transmitted to the terminal device.

(Appendix 7)
The network control device according to Appendix 1, wherein the corresponding table of each of the plurality of base station devices is a table obtained from each of a plurality of communication carriers operating the plurality of base station devices.

(Appendix 8)
Furthermore, it is equipped with a terminal number estimation unit.
The terminal number estimation unit is used when the first and second terminal devices controllable by the network control device are connected to the base station device and the other base station device, respectively.
The first total number of terminals of the first terminal device contracted with the telecommunications carrier and the number of terminals of the terminal device not contracted with the telecommunications carrier connected to the base station device. , Obtained from the base station equipment operated by the first telecommunications carrier,
The second terminal contracted with the telecommunications carrier, which connects to the other base station device based on the line quality information collected from the second terminal device connected to the other base station device. The second total number of terminals, which is the number of terminals of the device and the number of terminals of the terminal device not contracted with the telecommunications carrier, is obtained from the other base station device operated by the second telecommunications carrier.
The line quality prediction unit provides the line quality information for the base station apparatus with the first correspondence indicating the correspondence between the number of terminals in the base station apparatus and the line quality information based on the first total number of terminals. A second that obtains the line quality information for the other base station apparatus from the table and shows the correspondence relationship between the number of terminals in the other base station apparatus and the line quality information based on the second total number of terminals. The network control device according to Appendix 1, which is obtained from the corresponding table of.

(Appendix 9)
The network control device according to Appendix 1, wherein the plurality of base station devices are arranged in the same area.

(Appendix 10)
The network control device according to Appendix 1, wherein the line quality information is information representing the number of bits of data that can be transmitted and received in a unit time.

(Appendix 11)
A terminal device that can switch the connection with a base station device operated by a plurality of telecommunications carriers, and is a control method in a network control device that controls the terminal device contracted with the telecommunications carrier.
A correspondence table showing the relationship between the line quality information of each of the plurality of base station devices and the number of terminals connected to each of the plurality of base station devices is stored in the memory.
Line quality information for the base station device to which the terminal device is connected is collected from the terminal device, and the line quality information is collected from the terminal device.
For all combinations of the base station device to which the terminal device is connected and the other base station device to which the terminal device can be connected from the base station device, the terminal device is connected to the other base station device. The line quality information for the base station device and the line quality information for the other base station device when the connection to the base station device is switched are obtained from the corresponding table based on the line quality information collected from the terminal device. Acquired,
A control method comprising transmitting a connection switching instruction instructing switching of a connection to the other base station device having the highest line quality information to the terminal device.

10: Communication system
100 (100-11 to 100-16, 100-21 to 100-25, 100-31 to 100-33): Terminal device 110: Control unit 111: Line quality collection function unit 112: Connection information collection function unit 113: Connection Pre-rewriting function unit 120: Communication unit 140: eSIM
200 (200-1 to 200-4, 200-11 to 200-13): Base station device 600 (600-1,600-3): Orchestrator (network control device)
610: Communication unit 620: Control unit 621: In-house line quality collection function unit 622: Same area terminal number estimation function unit 623: Line quality prediction function unit after changing the connection destination 624: Connection destination switching instruction function unit 630: Memory 631: Average throughput support table

Claims (4)

In a terminal device that can switch the connection with a base station device operated by a plurality of telecommunications carriers, and is a network control device that controls the terminal device contracted with the telecommunications carrier.
A line quality collecting unit that collects line quality information for the base station device to which the terminal device is connected from the terminal device,
A memory that stores a correspondence table showing the relationship between the line quality information of each of the plurality of base station devices and the number of terminals connected to each of the plurality of base station devices.
For all combinations of the base station device to which the terminal device is connected and the other base station device to which the terminal device can be connected from the base station device, the terminal device is connected to the other base station device. The line quality information for the base station device and the line quality information for the other base station device when the connection to the base station device is switched are obtained from the corresponding table based on the line quality information collected from the terminal device. The line quality prediction department to be acquired and
A network control device including a connection destination switching instruction unit that transmits a connection switching instruction for instructing switching of a connection to the other base station device having the highest line quality information to the terminal device. .. Furthermore, it is equipped with a terminal number estimation unit.
The terminal number estimation unit is used when the first and second terminal devices controllable by the network control device are connected to the base station device and the other base station device, respectively.
The number of terminals of the first terminal device contracted with the telecommunications carrier, which is connected to the base station device based on the line quality information collected from the first terminal device connected to the base station device. The first total number of terminals, which is the number of terminals of the terminal device not contracted with the telecommunications carrier, is acquired from the first correspondence table showing the correspondence relationship between the number of terminals in the base station device and the line quality information. ,
The second terminal contracted with the telecommunications carrier, which connects to the other base station device based on the line quality information collected from the second terminal device connected to the other base station device. The second total number of terminals, which is the number of terminals of the device and the number of terminals of the terminal device not contracted with the telecommunications carrier, is the second indicating the correspondence relationship between the number of terminals in the other base station device and the line quality information. Obtained from the corresponding table of
The line quality prediction unit acquires the line quality information for the base station apparatus from the first corresponding table based on the first total number of terminals, and based on the second total number of terminals, said The network control device according to claim 1, wherein the line quality information for another base station device is acquired from the second correspondence table. The line quality prediction unit acquires the line quality information when the total number of terminals of the first is set to "-1" from the first corresponding table, and sets the total number of terminals of the second to "+1". The network control device according to claim 2, wherein the line quality information at that time is acquired from the second correspondence table. A terminal device that can switch the connection with a base station device operated by a plurality of telecommunications carriers, and is a control method in a network control device that controls the terminal device contracted with the telecommunications carrier.
A correspondence table showing the relationship between the line quality information of each of the plurality of base station devices and the number of terminals connected to each of the plurality of base station devices is stored in the memory.
Line quality information for the base station device to which the terminal device is connected is collected from the terminal device, and the line quality information is collected from the terminal device.
For all combinations of the base station device to which the terminal device is connected and the other base station device to which the terminal device can be connected from the base station device, the terminal device is connected to the other base station device. The line quality information for the base station device and the line quality information for the other base station device when the connection to the base station device is switched are obtained from the corresponding table based on the line quality information collected from the terminal device. Acquired,
A control method comprising transmitting a connection switching instruction instructing switching of a connection to the other base station device having the highest line quality information to the terminal device.

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