Communication device, terminal device, and communication method

Abstract

We propose communication devices, terminal devices, and communication methods that can achieve high communication performance. [Solution] The communication device is a communication device provided in a wireless network including a plurality of communication points that can communicate in cooperation, and includes a notification unit that notifies a terminal device of information regarding transmission power control used by a dynamically configured cluster which is composed of one or more of the communication points, to the terminal device.

Claims

1. A communication device provided in a wireless network that includes multiple communication points capable of coordinating communication, A notification unit that notifies a terminal device of information regarding transmission power control used by a dynamically configured cluster, which is composed of one or more communication points, to the terminal device. A communication device equipped with the following features.

2. The notification unit notifies the terminal device of information regarding the transmission power control determined according to a clustering method for determining one or more communication points constituting the cluster. The communication device according to claim 1.

3. The notification unit notifies the terminal device of information regarding the transmission power control used by the terminal device for initial access control. The communication device according to claim 2.

4. The initial access control is performed according to a random access procedure. The notification unit notifies the terminal device of information regarding the transmission power control used by the terminal device to transmit message 1 of the random access procedure using a synchronization signal or broadcast information. The communication device according to claim 3.

5. The initial access control is performed according to a random access procedure. The notification unit notifies the terminal device of information regarding the transmission power control used by the terminal device in transmitting the message 3 of the random access procedure using the message 2 of the random access procedure. The communication device according to claim 3.

6. The information relating to the transmission power control includes information relating to a transmission power control method determined according to a clustering method for determining one or more communication points constituting the cluster to which other terminal devices are connected. The communication device according to claim 3.

7. The information relating to the transmission power control includes information relating to a transmission power control method used when the terminal device connected to the cluster transmits an uplink signal to the cluster. The communication device according to claim 3.

8. The information relating to the transmission power control includes, in addition to information relating to the transmission power control method used by the terminal device, information relating to the size of the cluster. The communication device according to claim 6.

9. The clustering method is a method of selecting a predetermined number of communication points to constitute the cluster based on the path loss between the terminal device and the communication point. The communication device according to claim 2.

10. The aforementioned clustering method is A first clustering method that selects a predetermined number of communication points as one or more communication points constituting the cluster, based on LSF (Large-Scale Fading) between the terminal device and the communication points, A second clustering method, in which one or more communication points constituting the cluster are selected based on the SINR (Signal-to-Interference-plus-Noise Ratio) between the terminal device and the communication points, or A third clustering method, comprising selecting a predetermined number of communication points as one or more communication points constituting the cluster, based on the Signal-to-Interference Ratio (SIR) between the terminal device and the communication points, excluding the transmission power of the terminal device, wherein the SIR is excluded. The communication device according to claim 2.

11. The terminal device includes a clustering unit that determines one or more communication points that constitute the cluster to which the terminal device is connected, The clustering unit selects a clustering method from among several clustering methods for determining one or more communication points that constitute the cluster. The communication device according to claim 2.

12. The information relating to the transmission power control includes information relating to the transmission power control method, The information regarding the transmission power control method is information that specifies the transmission power control method to be used by the terminal device from among a plurality of transmission power control methods. The communication device according to claim 2.

13. The plurality of transmission power control methods include: A first transmission power control method that calculates the transmission power of the terminal device based on the path loss between the terminal device and a communication point selected based on communication quality, A second transmission power control method for calculating the transmission power of the terminal device based on the sum of the received power from one or more communication points constituting the cluster to which the terminal device is connected, A third transmission power control method that calculates the transmission power of the terminal device based on the sum of the received power from a predetermined number of communication points selected based on communication quality, Includes, The communication device according to claim 12.

14. The aforementioned communication quality is the Large-Scale Fading (LSF) between the terminal device and the communication point. The communication device according to claim 13.

15. The aforementioned clustering method is A first clustering method that selects a predetermined number of communication points as one or more communication points constituting the cluster, based on LSF (Large-Scale Fading) between the terminal device and the communication points, A second clustering method for selecting a predetermined number of communication points as one or more communication points constituting the cluster, based on the SINR (Signal-to-Interference-plus-Noise Ratio) between the terminal device and the communication points, It is one of several clustering methods, including The aforementioned notification unit, If the clustering method is the first clustering method, the terminal device shall notify the terminal device of the first transmission power control method, the second transmission power control method, or the third transmission power control method. If the clustering method is the second clustering method, the terminal device will be notified of the second or third transmission power control method as the transmission power control method to be used. The communication device according to claim 13.

16. The notification unit, when the clustering method is the second clustering method, notifies the terminal device of the third transmission power control method as the transmission power control method to be used. The communication device according to claim 15.

17. The aforementioned wireless network is a cell-free network. The communication device according to claim 1.

18. A cluster dynamically configured in a wireless network including multiple communication points capable of coordinating communication, and a terminal device that can connect to the cluster, which is composed of one or more of the aforementioned communication points, A receiving control unit that receives information regarding the transmission power control used by the terminal device from a communication device provided in the wireless network, A transmission control unit that controls the transmission power based on the information regarding the transmission power control, A terminal device equipped with the following features.

19. A communication device in a wireless network that includes multiple communication points capable of coordinating communication, A dynamically configured cluster, comprising one or more of the aforementioned communication points, is used by a terminal device that can connect to the cluster. Information regarding the transmission power control used by the terminal device is notified to the terminal device. Communication method.

20. A cluster dynamically configured in a wireless network including multiple communication points capable of coordinating communication, and a terminal device that can connect to the cluster, which is composed of one or more of the aforementioned communication points, The terminal device receives information regarding the transmission power control used by the terminal device from the communication device provided by the wireless network. The transmit power is controlled based on the information regarding the transmit power control. Communication method.

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