Terminal equipment, base station equipment, control method, and program for reducing network power consumption

Abstract

Expand the environment that enables power saving in the network using carrier aggregation (CA). [Solution] In a wireless communication system, base station device 101 transmits configuration information for CA to terminal device 103 via an RRC Reconfiguration message. The terminal device obtains the configuration information and, based on the obtained configuration information, performs communication using CA with the cell provided by base station device 101 as a Pcell and the cell provided by base station device 102 as an Scell. The terminal device recognizes from the configuration information that the Scell ​​is an SSB-less Scell ​​and should refer to a specific frequency position or 5G cell for time synchronization, etc. It observes 5G SS at the frequency position or cell to be referenced for time synchronization, etc., as specified by the configuration information, performs processes such as establishing time synchronization and AGC, and performs CA-based communication with the Pcell and Scell.

Claims

1. A terminal device that communicates using carrier aggregation (CA) in a first wireless communication system compliant with the first generation cellular communication standard, A receiving means for receiving setting information relating to CA from a base station device of the first wireless communication system, wherein the first cell provided by the base station device is the primary cell and the second cell of the first wireless communication system, provided from a different location from the primary cell, is the secondary cell, and the setting information includes information for the terminal device to receive a synchronization signal of a third cell of the second wireless communication system, which is treated as being provided from the same location as the second cell and is used at least for establishing time synchronization in the secondary cell, and which conforms to a second generation cellular communication standard different from the first generation, An execution means for establishing time synchronization in the secondary cell based on the synchronization signal of the second wireless communication system, The primary cell and the secondary cell, and communication means for performing communication using CA, A terminal device characterized by having the following features.

2. The terminal device according to claim 1, wherein the information for the terminal device to receive the synchronization signal of the third cell includes information indicating the frequency position to which the synchronization signal is transmitted.

3. The aforementioned setting information includes information indicating the settings when the third cell is used in CA, and the settings include identification information for specifying each cell used in CA. The information for the terminal device to receive the synchronization signal of the third cell includes the identification information that identifies the third cell. The terminal device according to feature 1.

4. The information for the terminal device to receive the synchronization signal of the third cell further includes information indicating the Bandwidth part of the frequency band used in the third cell to which the synchronization signal is transmitted. The terminal device according to feature 3.

5. The terminal device according to any one of claims 1 to 4, characterized in that the first wireless communication system is a sixth-generation (6G) cellular communication system, and the second wireless communication system is a fifth-generation (5G) cellular communication system.

6. A base station device for a first wireless communication system conforming to a first-generation cellular communication standard, In the first wireless communication system, the terminal device which communicates using carrier aggregation (CA) with a first cell provided by the base station device as the primary cell and a second cell of the first wireless communication system provided from a different location than the primary cell as the secondary cell, has a notification means for notifying the terminal device of setting information including information for receiving a synchronization signal of a third cell of a second wireless communication system that conforms to a second generation cellular communication standard different from the first generation, which is treated as being provided from the same location as the second cell and is used for time synchronization in the secondary cell. A base station device characterized by the following features.

7. The base station device according to claim 6, characterized in that the information for the terminal device to receive the synchronization signal of the third cell includes information indicating the frequency position to which the synchronization signal is transmitted.

8. The aforementioned setting information includes information indicating the settings when the third cell is used in CA, and the settings include identification information for specifying each cell used in CA. The information for the terminal device to receive the synchronization signal of the third cell includes the identification information that identifies the third cell. The base station device according to feature 6.

9. The information for the terminal device to receive the synchronization signal of the third cell further includes information indicating the Bandwidth part of the frequency band used in the third cell to which the synchronization signal is transmitted. The base station device according to feature 8.

10. The base station device according to any one of claims 6 to 9, characterized in that the first wireless communication system is a sixth-generation (6G) cellular communication system, and the second wireless communication system is a fifth-generation (5G) cellular communication system.

11. A control method performed by a terminal device that communicates using carrier aggregation (CA) in a first wireless communication system compliant with a first-generation cellular communication standard, Receiving setting information from the base station device of the first wireless communication system, which includes setting information relating to CA with a first cell provided by the base station device as the primary cell and a second cell of the first wireless communication system provided from a different location than the primary cell as the secondary cell, and which includes information for the terminal device to receive a synchronization signal of a third cell of the second wireless communication system that conforms to a second generation cellular communication standard different from the first generation, which is treated as being provided from the same location as the second cell and is used at least for establishing time synchronization in the secondary cell; Based on the synchronization signal of the second wireless communication system, at least time synchronization is established in the secondary cell, The primary cell and the secondary cell communicate using CA, A control method characterized by including

12. A control method performed by a base station device of a first wireless communication system conforming to a first-generation cellular communication standard, In the first wireless communication system, the first wireless communication system includes notifying a terminal device that communicates using carrier aggregation (CA) with a first cell provided by the base station device as the primary cell and a second cell of the first wireless communication system provided from a different location than the primary cell as the secondary cell, of configuration information including information for the terminal device to receive a synchronization signal of a third cell of a second wireless communication system that conforms to a second generation cellular communication standard different from the first generation, which is treated as being provided from the same location as the second cell and is used for time synchronization in the secondary cell. A control method characterized by the following:

13. A program for causing a computer installed in a terminal device to execute the control method described in claim 11.

14. A program for causing a computer installed in a base station device to execute the control method described in claim 12.

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