NETWORK NODE, TERMINAL DEVICE, CONTROL METHOD, AND PROGRAM FOR IMPROVING EFFICIENCY OF COMMUNICATION USING MULTIPLE CARRIER WAVES

Abstract

To improve the efficiency of communication using a plurality of carrier waves.SOLUTION: A network node obtains, from a terminal device, information about first received power of a first carrier wave and second received power of a second carrier wave at the terminal device, determines whether or not a difference value between the first received power and the second received power exceeds a predetermined value based on the information, and controls the terminal device to start communication by dual connectivity or carrier aggregation using the first carrier wave and the second carrier wave based on the determination that the difference value between the first received power and the second received power does not exceed the predetermined value.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a wireless communication technology using multiple carrier waves. [Background technology]

[0002] The Third Generation Partnership Project (3GPP) specifies mechanisms for dual connectivity and carrier aggregation, in which a terminal device communicates using a plurality of carriers (component carriers). Summary of the Invention [Problem to be solved by the invention]

[0003] For example, a terminal device may process communications using multiple carriers in the same band using one communication circuit. In this case, if the difference in received power between the multiple carriers is large, for example, in communications using a carrier with a lower received power, sufficient throughput may not be obtained, resulting in insufficient communication efficiency. [Means for solving the problem]

[0004] The present invention provides techniques for improving the efficiency of communications using multiple carriers.

[0005] According to an aspect of the present invention, a network node includes a terminal device, the terminal device including: a first receiving power of a first carrier wave and a second receiving power of a second carrier wave; 1. information and second information for identifying the communication circuit of the terminal device. from the terminal device; 1. Based on the information, a difference value between the first reception power and the second reception power is Based on the second piece of information The signal processing device includes a determination means for determining whether or not a predetermined value is exceeded, and a control means for controlling the terminal device to start communication via dual connectivity or carrier aggregation using the first carrier and the second carrier based on the determination that the difference value between the first received power and the second received power does not exceed the predetermined value. A terminal device according to one embodiment of the present invention is connected to a base station device that performs control related to dual connectivity or carrier aggregation using first information acquired from the terminal device for identifying a communication circuit of the terminal device, and has a reporting means that reports to the base station device the first information and second information related to a first received power of the first carrier and a second received power of the second carrier for a first carrier and a second carrier used for the dual connectivity or the carrier aggregation. Effect of the Invention

[0006] According to the present invention, it is possible to improve the efficiency of communications using multiple carrier waves. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system. [Diagram 2] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station device. [Diagram 3] FIG. 2 is a diagram illustrating an example of a functional configuration of a base station device. [Figure 4] FIG. 11 is a diagram illustrating an example of a flow of processing executed by a base station device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims, and not all combinations of features described in the embodiments are essential to the invention. Two or more features among the multiple features described in the embodiments may be arbitrarily combined. In addition, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0009] (Network Configuration) FIG. 1 shows an example of the configuration of a network according to this embodiment. This network is, for example, a cellular wireless communication network in which wireless communication is performed in accordance with the Long Term Evolution (LTE) or New Radio (NR) standard of the Third Generation Partnership Project (3GPP). This network includes, for example, a base station device 101 and a terminal device 111. In this embodiment, the terminal device 111 is configured to be able to perform communication using dual connectivity (DC) or carrier aggregation (CA), which are defined as a mechanism for using multiple carriers (component carriers) in parallel. In addition, FIG. 1 shows an example in which the terminal device 111 performs communication using two carriers, a first carrier (CC1) and a second carrier (CC2). In addition, the communication using the first carrier and the second carrier may both be provided by the base station device 101, or may be configured such that the base station device 101 provides communication using the first carrier and another base station device 102 provides communication using the second carrier. The terminal device 111 may be configured to communicate using three or more carriers in parallel. In one example, the base station device 101 may be a base station device that operates in accordance with the NR standard, and the base station device 102 may be a base station device that operates in accordance with the LTE standard. The terminal device 111 may communicate, for example, using a first carrier associated with LTE and a second carrier associated with NR in parallel. The terminal device 111 may communicate, for example, using a first carrier and a second carrier both associated with NR in parallel.

[0010] The terminal device 111 may execute reception processing of two or more carriers using, for example, one communication circuit. In this case, for example, when the difference value between the first reception power for the first carrier and the second reception power for the second carrier exceeds a certain value, the communication throughput of the carrier with the lower reception power may become insufficient. For example, according to TS38.101 of 3GPP, when the first reception power is 6 dB higher than the second reception power, the throughput of the second carrier is required to achieve 85% of the maximum throughput as the performance of the terminal device. Therefore, for example, when the second reception power is even lower, it is expected that the throughput will further decrease. Therefore, the efficiency of communication using multiple carriers will decrease due to the decrease in throughput caused by the increase in the difference value between the first reception power and the second reception power.

[0011] In view of the above circumstances, this embodiment provides a technique for improving the efficiency of wireless communication (for example, DC or CA) that uses multiple carriers in parallel.

[0012] The base station device 101 of this embodiment, for example, acquires information regarding a first received power for a first carrier wave and a second received power for a second carrier wave at the terminal device 111 from the terminal device 111, and based on the information, decides whether to cause the terminal device 111 to execute DC or CA.

[0013] The base station device 101 may determine whether or not the difference between the first reception power and the second reception power exceeds a predetermined value when the terminal device 111 is not performing communication by DC or CA, and may control the terminal device 111 to start communication by DC or CA based on the determination that the difference does not exceed the predetermined value. In the terminal device 111, when the reception power difference between the first reception power in the first carrier currently used for communication and the second reception power in the second carrier available for communication by DC or CA is sufficiently small, the terminal device 111 can perform communication by DC or CA without an extreme decrease in throughput. In other words, a situation in which the reception power difference is sufficiently small can be said to be a situation in which the terminal device 111 can perform sufficiently efficient communication when communicating using the second carrier as a secondary cell. For this reason, the base station device 101 may determine to cause the terminal device 111 to start communication by DC or CA on the condition that the difference between the first reception power and the second reception power does not exceed a predetermined value. In addition, when the terminal device 111 should not execute communication by DC or CA, the base station device 101 may not cause the terminal device 111 to start communication by DC or CA even if the difference value between the first reception power and the second reception power does not exceed a predetermined value. That is, the condition for causing the terminal device 111 to start communication by DC or CA is that the difference value between the first reception power and the second reception power does not exceed a predetermined value, and even if this condition is satisfied, communication by DC or CA may not be started.

[0014] In addition, when there are multiple carriers that can perform sufficiently efficient communication when used as a secondary cell in the terminal device 111, the base station device 101 may determine the carrier to be used in DC or CA according to the load status of the base station device providing communication in the carrier. For example, the base station device 101 acquires from the terminal device 111 not only information that can specify a first difference value between the first reception power of the first carrier and the second reception power of the second carrier in the terminal device 111, but also information that can specify a second difference value between the first reception power and the third reception power of the third carrier. Then, when it is determined that both the first difference value and the second difference value do not exceed a predetermined value, the base station device 101 determines which of the second carrier and the third carrier should be used based on the load of the base station device providing communication using the second carrier and the load of the base station device providing communication using the third carrier. For example, the base station device 101 may use the second carrier as a secondary cell when the load of the base station device providing communication using the second carrier is lower than the load of the base station device providing communication using the third carrier. Also, the base station device 101 may use the third carrier as a secondary cell when the load of the base station device providing communication using the third carrier is lower than the load of the base station device providing communication using the second carrier. Note that, when both the load of the base station device providing communication using the second carrier and the load of the base station device providing communication using the third carrier are sufficiently low, for example, the smaller of the above-mentioned first differential value and second differential value may be used. That is, when the first differential value is smaller than the second differential value, the second carrier may be used as a secondary cell, and when the second differential value is smaller than the first differential value, the third carrier may be used as a secondary cell. In addition, when the terminal device 111 is capable of using three or more carriers in parallel, the base station device 101 may execute control to cause the terminal device 111 to perform communication via DC or CA using both the second carrier and the third carrier.

[0015] Furthermore, when the base station device 101 determines that the difference between the first reception power and the second reception power exceeds a predetermined value while the terminal device 111 is performing communication by DC or CA using the first carrier and the second carrier, the base station device 101 may control the terminal device 111 to terminate the communication. When the difference between the first reception power and the second reception power becomes large during communication by DC or CA using the first carrier and the second carrier in the terminal device 111, it is expected that the efficiency of the communication will decrease. For this reason, the base station device 101 performs control to terminate communication by DC or CA (for example, communication by a secondary cell).

[0016] The base station device 101 may perform only the start process of communication by DC or CA as described above, or may not perform the end process of communication by DC or CA. The base station device 101 may perform only the end process of communication by DC or CA, and may not perform the start process of communication by DC or CA as described above. The base station device 101 may perform both of these processes. The base station device 101 may allow the start of communication by DC or CA, for example, based on the fact that a state in which the difference value of the received power does not exceed a predetermined value continues for a predetermined time in the above-mentioned process. Similarly, the base station device 101 may control to end the communication by DC or CA that is being executed, when a state in which the difference value of the received power exceeds a predetermined value continues for a predetermined time in the above-mentioned process. For example, in the conventional standard, an event is specified in which measurement and reporting of the wireless quality of a connected cell and its neighboring cell is performed in response to the wireless quality of a neighboring cell using a different radio access technology (RAT) becoming equal to or greater than a predetermined value. At this time, the base station device 101 may identify a difference value between the received power of the first carrier and the second carrier based on the measurement report, and perform the above-mentioned processing based on the difference value.

[0017] The terminal device 111 may calculate a difference value between the first reception power of the first carrier and the second reception power of the second carrier. In this case, the base station device 101 may notify the terminal device 111 of, for example, the above-mentioned predetermined value. The base station device 101 may notify the terminal device 111 of this predetermined value in association with a condition for reporting at least one of the above-mentioned various information. When the terminal device 111 determines that the notified condition is satisfied, it may report at least one of the above-mentioned various information. In one example, the base station device 101 may notify the terminal device 111 of the condition that the difference value between the first reception power and the second reception power exceeds a predetermined value. This condition may be notified, for example, when the terminal device 111 is already performing communication by DC or CA. For example, the first carrier is a carrier of a master cell, the second carrier is a carrier of a secondary cell, and the terminal device 111 may transmit a predetermined report to the base station device 101 when a difference value obtained by subtracting the second received power from the first received power exceeds a predetermined value. The base station device 101 may also notify the base station device 101 on the condition that the difference value between the first received power and the second received power does not exceed a predetermined value. Note that this condition may be notified, for example, when the terminal device 111 is not performing communication by DC or CA. The terminal device 111 may transmit a predetermined report to the base station device 101 when a difference value obtained by subtracting the received power of the second carrier corresponding to a surrounding secondary cell candidate from the first received power of the first carrier associated with the connected cell does not exceed a predetermined value. The base station device 101 may also notify the base station device 101 of, for example, a value of a timer to be set in the terminal device 111. In this case, the terminal device 111 may start a timer when the calculated difference value exceeds (or falls below) a predetermined value, and transmit a report to the base station device 101 in response to the timer expiring while maintaining that state. In the report here, for example, information indicating the difference value may be notified. In addition, in the report here, any information capable of identifying whether or not the difference value has exceeded a predetermined value, such as information indicating that the difference value has exceeded or not exceeded the predetermined value, may be notified. In addition, the terminal device 111 may report information indicating the first reception power and information indicating the second reception power to the base station device 101.

[0018] The terminal device 111 may have multiple communication circuits. In this case, the terminal device 111 may be configured to process the first carrier by the first communication circuit and process the second carrier by the second communication circuit, for example. When multiple communication circuits are available in this way, even if the difference between the first reception power of the first carrier and the second reception power of the second carrier is large to a certain extent, communication may be possible without a significant decrease in throughput. That is, when multiple carriers are processed in one communication circuit, if the power difference is large, the signal of the carrier with low power may be buried due to a lack of dynamic range of the communication circuit, etc., but when separate communication circuits are used, the influence of other carriers other than the carrier processed by the communication circuit can be suppressed, so quality degradation due to the dynamic range is less likely to occur. However, for example, for a low-power carrier, the influence of power leakage from other carriers may not be negligible, so in a situation where the power difference is extremely large, a decrease in throughput may still occur. Therefore, even when multiple carriers are processed by separate communication circuits, communication by DC or CA may be performed on condition that the power difference does not exceed a predetermined value. However, a first predetermined value when multiple carriers are processed by one communication circuit and a second predetermined value when multiple carriers are processed by separate communication circuits may be set separately. Here, for example, the first predetermined value may be set smaller than the second predetermined value. That is, when multiple carriers are processed by one communication circuit, communication by DC or CA may be permitted on condition that the power difference between the first carrier and the second carrier is sufficiently small, and when multiple carriers are processed by separate communication circuits, communication by DC or CA may be permitted even if the power difference is larger than the first predetermined value.

[0019] The base station device 101 may acquire information indicating whether the terminal device 111 processes multiple carriers using one communication circuit or processes multiple carriers using separate communication circuits from the terminal device 111. This information may be, for example, information indicating the number of communication circuits that the terminal device 111 has.

[0020] Although an example has been described in which the base station device 101 controls communication using dual connectivity or carrier aggregation in the terminal device 111 based on the magnitude of the difference value of the received power in the terminal device 111, the present invention is not limited to this. In other words, any network node including the base station device 101 may be configured to execute the above-mentioned process.

[0021] (Device configuration) FIG. 2 is a diagram showing an example of a hardware configuration of the base station device 101. In one example, the base station device 101 includes a processor 201, a ROM 202, a RAM 203, a storage device 204, and a communication circuit 205. The processor 201 is a computer including one or more processing circuits such as a general-purpose CPU (Central Processing Unit) or an ASIC (Application Specific Integrated Circuit), and executes the overall processing of the device and each of the above-mentioned processes by reading and executing a program stored in the ROM 202 or the storage device 204. The ROM 202 is a read-only memory that stores information such as a program related to the processing executed by the base station device 101 and various parameters. The RAM 203 functions as a workspace when the processor 201 executes a program, and is a random access memory that stores temporary information. The storage device 204 is, for example, a removable external storage device. The communication circuit 205 is, for example, a circuit for wireless communication of LTE or 5G. 2, one communication circuit 205 is illustrated, but the base station device 101 may have multiple communication circuits. For example, the base station device 101 may have a communication circuit for wired communication with another base station device (e.g., the base station device 102).

[0022] 3 is a diagram showing an example of the functional configuration of the base station device 101. The base station device 101 includes, for example, an information acquisition unit 301, a determination unit 302, a control unit 303, a setting unit 304, and a condition notification unit 305. These functional units can be implemented, for example, by the processor 201 executing a program stored in the ROM 202 or the storage device 204. However, this is not limited to this, and for example, some or all of these functional units may be implemented using dedicated hardware. Note that, since the processing to be executed by the base station device 101 has been described above, the functional configuration of the base station device 101 will be roughly outlined here.

[0023] The information acquisition unit 301 acquires information on a first reception power obtained by measuring a first carrier corresponding to a cell to which the terminal device 111 is currently connected, and a second reception power obtained by measuring a second carrier corresponding to a secondary cell used in communication by DC or CA or a candidate for a usable secondary cell. This information may include information indicating the first reception power and information indicating the second reception power. This information may also include information indicating a difference value between the first reception power and the second reception power. This information may also include information that can specify whether or not the difference value between the first reception power and the second reception power has exceeded a predetermined value. The information acquisition unit 301 may acquire information on the reception power of two or more other carriers (for example, a second carrier and a third carrier) in addition to the first carrier corresponding to the connected cell. The information acquisition unit 301 may also acquire information indicating whether the terminal device 111 processes a plurality of carriers using one communication circuit or each of the carriers using separate communication circuits from the terminal device 111, for example.

[0024] The determination unit 302 determines whether or not the difference value between the first reception power and the second reception power exceeds a predetermined value based on the information acquired by the information acquisition unit 301. Furthermore, when information on the third reception power is acquired by the information acquisition unit 301, for example, the determination unit 302 may determine whether or not the difference value between the first reception power and the third reception power exceeds a predetermined value.

[0025] The control unit 303 executes control related to the communication by DC or CA of the terminal device 111 based on the result of the judgment by the judgment unit 302. For example, when the terminal device 111 is not performing communication by DC or CA using the second carrier, the control unit 303 controls the terminal device 111 to start communication by DC or CA using the second carrier based on the difference value between the first reception power and the second reception power not exceeding a predetermined value. Also, for example, when the terminal device 111 is performing communication by DC or CA using the second carrier and the difference value between the first reception power and the second reception power exceeds a predetermined value, the control unit 303 controls the terminal device 111 to end the communication by DC or CA. In addition, for example, when the terminal device 111 is not performing communication by DC or CA using at least one of the second carrier and the third carrier, the difference value between the first reception power and the second reception power does not exceed a predetermined value, and the difference value between the first reception power and the third reception power does not exceed a predetermined value, the control unit 303 may determine a carrier to be used in communication by DC or CA based on the load of the base station device providing communication by the second carrier and the load of the base station device providing communication by the third carrier. Note that the control unit 303 may control the terminal device 111 by, for example, transmitting a radio resource control (RRC) message to the terminal device 111.

[0026] The setting unit 304 sets the above-mentioned predetermined value for the terminal device 111, for example. The setting unit 304 may set a first predetermined value when the terminal device 111 uses one communication circuit to process a plurality of carriers, and may set a second predetermined value larger than the first predetermined value when the terminal device 111 uses multiple communication circuits, each of which is separate, for a plurality of carriers. The setting unit 304 may set the predetermined value based on, for example, capability information of the terminal device 111 other than the number of communication circuits. That is, when the terminal device 111 has the capability to separate signals with high accuracy even when the reception power difference between the plurality of carriers is large, the predetermined value may be set to a large value. In this way, the setting unit 304 may set a predetermined value separately for each terminal device based on the capability information of the terminal device. The condition notification unit 305 notifies the terminal device 111 of information indicating a condition to be satisfied when the terminal device 111 reports information on the first reception quality and the second reception quality (and the third reception quality in some cases) to the base station device 101. The condition may include, for example, that the difference between the first reception power and the second reception power exceeds a predetermined value. The condition may also include, for example, that the difference between the first reception power and the second reception power does not exceed a predetermined value. The predetermined value may be the same as the predetermined value used in the determination unit 302, or may be a different value.

[0027] (Processing flow) Next, an example of the flow of the process executed by the base station device 101 will be described. The base station device 101 first performs measurement and report configuration for the terminal device 111 (S401). For example, the base station device 101 notifies the terminal device 111 of measurement configuration information of carriers to be measured (for example, a first carrier corresponding to a serving cell of the terminal device 111 provided by the base station device 101, and a second carrier corresponding to a secondary cell or a candidate for the secondary cell). In addition, the base station device 101 instructs the terminal device 111 to notify information related to a first reception power of the first carrier and a second reception power of the second carrier, for example. In addition, the base station device 101 may notify the terminal device 111 of information indicating a condition for performing a report, for example.

[0028] After that, the base station device 101 acquires information on the first reception power and the second reception power from the terminal device 111 (S402). Then, the base station device 101 identifies a difference value between the first reception power and the second reception power (S403). For example, the base station device 101 may acquire information indicating the first reception power and information indicating the second reception power in S402, and calculate the difference value from the values ​​indicated by the information in S403. The base station device 101 may also receive a message including information indicating a difference value between the first reception power and the second reception power in S402, and identify the difference value by analyzing the message in S403. The base station device 101 may also acquire information capable of identifying whether or not the difference value between the first reception power and the second reception power has exceeded a predetermined value in S402. In this case, the identification of the difference value in S403 may not be performed.

[0029] Here, if the terminal device 111 is communicating in DC or CA (YES in S404), the base station device 101 judges whether the difference value acquired in S403 exceeds a predetermined value (S405). If the difference value exceeds the predetermined value (YES in S405), the base station device 101 decides to end the ongoing DC or CA communication, and controls the terminal device 111 according to the decision (S406). On the other hand, if the difference value does not exceed the predetermined value (NO in S405), the base station device 101 ends the process without ending the ongoing DC or CA communication. Note that even in this case, for example, when the terminal device 111 no longer needs to perform DC or CA communication, the DC or CA communication may naturally be ended.

[0030] Even if the terminal device 111 is not communicating by DC or CA (NO in S404), the base station device 101 determines whether or not the difference value acquired in S403 exceeds a predetermined value (S407). Then, if the difference value does not exceed the predetermined value (YES in S407), the base station device 101 permits the terminal device 111 to perform communication by DC or CA (S408). Note that the predetermined value in S407 may be a value different from the predetermined value in S405, or may be the same value. Then, when the terminal device 111 should perform communication by DC or CA, the base station device 101 executes settings for performing communication by DC or CA. For example, the base station device 101 may control the terminal device 111 by transmitting an RRC message to the terminal device 111. On the other hand, if the difference value does not exceed the predetermined value (YES in S407), the base station device 101 does not permit the terminal device 111 to perform communication by DC or CA, and ends the process.

[0031] In this way, in this embodiment, it is possible to prevent communication by DC or CA using a combination of carriers that results in a large difference in the received power of multiple carriers measured by a terminal device. As a result, it is possible to improve communication efficiency, and therefore to contribute to Goal 9 of the United Nations-led Sustainable Development Goals (SDGs), which is to "build resilient infrastructure, promote sustainable industrialization and foster innovation."

[0032] The invention is not limited to the above-described embodiment, and various modifications and variations are possible within the scope of the gist of the invention.

Claims

1. an acquisition means for acquiring, from a terminal device, first information relating to a first reception power of a first carrier wave and a second reception power of a second carrier wave in the terminal device and second information for identifying a communication circuit of the terminal device; a determination means for determining whether or not a difference value between the first reception power and the second reception power exceeds a predetermined value based on the second information, based on the first information; A control means for controlling the terminal device to start communication by dual connectivity or carrier aggregation using the first carrier and the second carrier based on the determination that the difference value between the first reception power and the second reception power does not exceed the predetermined value; A network node comprising:

2. The acquiring means further acquires third information related to third reception power of a third carrier in the terminal device from the terminal device; The control means, based on the determination that the difference value between the first reception power and the second reception power does not exceed the predetermined value and the difference value between the first reception power and the third reception power does not exceed the predetermined value, when a load of a base station device providing communication using the second carrier is lower than a load of a base station device providing communication using the third carrier, causing the terminal device to start communication using dual connectivity or carrier aggregation using the first carrier and the second carrier; when a load of a base station device providing communication using the third carrier is lower than a load of a base station device providing communication using the second carrier, causing the terminal device to start communication using dual connectivity or carrier aggregation using the first carrier and the third carrier; 2. The network node according to claim 1, further comprising: a control unit for controlling a plurality of nodes in a network.

3. an acquisition means for acquiring, from a terminal device, first information relating to a first reception power of a first carrier wave and a second reception power of a second carrier wave in the terminal device and second information for identifying a communication circuit of the terminal device; a determination means for determining whether or not a difference value between the first reception power and the second reception power exceeds a predetermined value based on the second information, based on the first information; A control means for controlling the terminal device to terminate communication by dual connectivity or carrier aggregation using the first carrier and the second carrier when it is determined that a difference value between the first reception power and the second reception power exceeds the predetermined value; A network node comprising:

4. 4. The network node according to claim 1, further comprising a setting means for setting a first value as the predetermined value when the terminal device processes the first carrier wave and the second carrier wave by a single communication circuit, and for setting a second value as the predetermined value when the terminal device processes the first carrier wave and the second carrier wave by separate communication circuits.

5. 5. The network node according to claim 4, wherein the second information is information indicating whether the terminal device processes the first carrier wave and the second carrier wave by a single communication circuit or by separate communication circuits.

6. The network node according to any one of claims 1 to 5, characterized in that the acquisition means acquires, as the first information, information indicating the first received power and information indicating the second received power from the terminal device.

7. The network node according to any one of claims 1 to 5, characterized in that the acquisition means acquires, from the terminal device, information indicating a difference value between the first received power and the second received power as the first information.

8. 8. The network node according to claim 1, further comprising a notification means for notifying the terminal device of information indicating a condition for notifying the first information in the terminal device.

9. 9. The network node according to claim 1, wherein the first carrier is a carrier associated with Long Term Evolution (LTE) and the second carrier is a carrier associated with New Radio (NR).

10. 9. The network node according to claim 1, wherein the first carrier and the second carrier are both carriers associated with New Radio (NR).

11. A terminal device connected to a base station device that executes control related to dual connectivity or carrier aggregation using first information for identifying a communication circuit of the terminal device, the first information being acquired from the terminal device, A terminal device characterized by having a reporting means for reporting to the base station device the first information and second information regarding a first received power of the first carrier and a second received power of the second carrier for a first carrier and a second carrier used for the dual connectivity or the carrier aggregation.

12. 12. The terminal device according to claim 11, wherein the first information is information used to determine whether processing for a plurality of carriers is performed using a single communication circuit or separate communication circuits.

13. The terminal device according to claim 11, characterized in that the first information is information used to determine whether processing of multiple carriers using respective communication circuits for each carrier is possible when a power difference between two carriers constituting the dual connectivity or the carrier aggregation exceeds a predetermined level.

14. The terminal device according to claim 11, characterized in that the first information is information used to determine whether the terminal device has a communication circuit for preventing a decrease in throughput when a power difference between two carriers that constitute the dual connectivity or the carrier aggregation exceeds a predetermined level.

15. The terminal device according to claim 11, characterized in that the terminal device is connected to a base station device that instructs the terminal device to start or end the dual connectivity or the carrier aggregation based on a result of a determination made when the determination is made based on the first information and a received power difference between the first received power and the second received power acquired from the terminal device, and that instructs the terminal device to start or end the dual connectivity or the carrier aggregation based on the result of the determination.

16. A control method performed by a network node, comprising the steps of: acquiring, from a terminal device, first information relating to a first reception power of a first carrier wave and a second reception power of a second carrier wave in the terminal device and second information for identifying a communication circuit of the terminal device; determining whether or not a difference value between the first reception power and the second reception power exceeds a predetermined value based on the second information based on the first information; Based on the determination that the difference value between the first reception power and the second reception power does not exceed the predetermined value, control is performed to cause the terminal device to start communication by dual connectivity or carrier aggregation using the first carrier and the second carrier; A control method comprising:

17. A control method performed by a network node, comprising the steps of: acquiring, from a terminal device, first information relating to a first reception power of a first carrier wave and a second reception power of a second carrier wave in the terminal device and second information for identifying a communication circuit of the terminal device; determining whether or not a difference value between the first reception power and the second reception power exceeds a predetermined value based on the second information based on the first information; When the terminal device is performing communication by dual connectivity or carrier aggregation using the first carrier and the second carrier, and it is determined that a difference value between the first reception power and the second reception power exceeds the predetermined value, control is performed to cause the terminal device to terminate the communication; A control method comprising:

18. A control method performed by a terminal device connected to a base station device that performs control related to dual connectivity or carrier aggregation using first information acquired from the terminal device for identifying a communication circuit of the terminal device, the control method comprising: A control method comprising: reporting to the base station device the first information and second information regarding a first received power of the first carrier and a second received power of the second carrier for a first carrier and a second carrier used for the dual connectivity or the carrier aggregation.

19. A computer installed at a network node acquiring, from the terminal device, first information relating to a first reception power of a first carrier wave and a second reception power of a second carrier wave in the terminal device and second information for identifying a communication circuit of the terminal device; determining whether or not a difference value between the first reception power and the second reception power exceeds a predetermined value based on the second information, based on the first information; Based on the determination that the difference value between the first reception power and the second reception power does not exceed the predetermined value, control is performed to cause the terminal device to start communication by dual connectivity or carrier aggregation using the first carrier and the second carrier. Program for.

20. A computer installed at a network node acquiring, from the terminal device, first information relating to a first reception power of a first carrier wave and a second reception power of a second carrier wave in the terminal device and second information for identifying a communication circuit of the terminal device; determining whether or not a difference value between the first reception power and the second reception power exceeds a predetermined value based on the second information, based on the first information; When the terminal device is performing communication by dual connectivity or carrier aggregation using the first carrier and the second carrier, and it is determined that a difference value between the first reception power and the second reception power exceeds the predetermined value, the terminal device is caused to perform control to terminate the communication. Program for.

21. A computer provided in a terminal device connected to a base station device that executes control related to dual connectivity or carrier aggregation using first information for identifying a communication circuit of the terminal device, the first information being acquired from the terminal device; A program for causing the base station device to report the first information and, for a first carrier and a second carrier used for the dual connectivity or the carrier aggregation, second information regarding a first received power of the first carrier and a second received power of the second carrier.

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