WO2022113651A1 - Relay device, first communication device, and second communication device - Google Patents

Abstract

A relay device according to an aspect of the present disclosure comprises: a first communication processing unit that transmits a first target signal through a first wireless link between a first communication device and the relay device; and a second communication processing unit that receives the first target signal through a second wireless link between a second communication device and the relay device, and performs first measurement based on the first target signal. The second communication processing unit receives a second target signal from the second communication device through the second wireless link, and performs second measurement based on the second target signal. Control information acquired from the results of the first and second measurements is transmitted from the first communication processing unit to the first communication device, or transmitted from the second communication processing unit to the second communication device.

Description

Relay device, first communication device and second communication device Cross-reference of related applications

This application is based on Japanese Patent Application No. 2020-198689 filed on November 30, 2020, claiming the benefit of its priority, and the entire content of the patent application is: Incorporated herein by reference.

The present disclosure relates to a relay device, a first communication device, and a second communication device.

In recent years, mobile communication technology has been proposed in 3GPP (3rd Generation Partnership Project) and standardized as a technical specification (TS). Currently, LTE (Long Term Evolution) technology has matured, and 5G (5th Generation) technology is being studied.

In a mobile communication network, a relay node can relay a signal between a base station and a user device (User Equipment: UE). For example, Patent Document 1 discloses a technique for reusing radio resources of another relay node in a relay node.

Patent No. 4966858

However, as a result of detailed examination by the inventor, in the technique disclosed in Patent Document 1, a radio resource for communication between a base station and a relay station is provided between the relay station and the UE. The problem was found that it cannot be reused for communication.

An object of the present disclosure is to provide a relay device, a first communication device and a second communication device that facilitate the reuse of radio resources between two radio links of the relay device.

The relay device according to one aspect of the present disclosure includes a first communication processing unit that transmits a signal to the first communication device at the first wireless link between the first communication device and the relay device, and a first communication processing unit. A second communication processing unit that receives a signal from the second communication device at the second wireless link between the communication device 2 and the relay device is provided. The first communication processing unit transmits the first target signal on the first wireless link. The second communication processing unit receives the first target signal at the second wireless link and performs the first measurement based on the first target signal. The second communication processing unit receives the second target signal from the second communication device at the second wireless link, and performs the second measurement based on the second target signal. The result of the first measurement and the control information obtained from the result of the second measurement are transmitted to the first communication device by the first communication processing unit, or are transmitted by the second communication processing unit to the first communication device. It is transmitted to the communication device of 2.

The first communication device according to one aspect of the present disclosure transmits a signal to the first communication device at the first wireless link between the first communication device and the relay device, and the second communication. From the relay device that receives the signal from the second communication device at the second wireless link between the device and the relay device, the result of the first measurement performed by the relay device and the line by the relay device. The communication processing unit that receives the control information obtained from the result of the second measurement, and the transmission power of the relay device in the first wireless link or the second wireless link based on the control information. A control unit that controls the transmission power of the second communication device in the above. The first measurement is a measurement based on a first target signal transmitted by the relay device at the first radio link and received by the relay device at the second radio link. The second measurement is a measurement based on a second target signal transmitted by the second communication device and received by the relay device at the second radio link.

The second communication device according to one aspect of the present disclosure transmits a signal to the first communication device at the first wireless link between the first communication device and the relay device, and the second communication. From the relay device that receives the signal from the second communication device at the second wireless link between the device and the relay device, the result of the first measurement performed by the relay device and the line by the relay device. The communication processing unit that receives the control information obtained from the result of the second measurement, and the transmission power of the relay device in the first wireless link or the second wireless link based on the control information. A control unit that controls the transmission power of the second communication device in the above. The first measurement is a measurement based on a first target signal transmitted by the relay device at the first radio link and received by the relay device at the second radio link. The second measurement is a measurement based on a second target signal transmitted by the second communication device and received by the relay device at the second radio link.

According to the present disclosure, it becomes easy to reuse radio resources between two radio links of the relay device. It should be noted that, according to the present disclosure, other effects may be produced in place of or in combination with the effect.

It is explanatory drawing which shows an example of the schematic structure of the system which concerns on embodiment of this disclosure. It is explanatory drawing which shows the example of the protocol stack of each apparatus which concerns on embodiment of this disclosure. It is explanatory drawing which shows the specific example of each apparatus which concerns on embodiment of this disclosure. It is explanatory drawing which shows the example of the arrangement of each apparatus which concerns on embodiment of this disclosure. It is a block diagram which shows the example of the schematic functional structure of the relay device which concerns on embodiment of this disclosure. It is a block diagram which shows the example of the schematic hardware structure of the relay device which concerns on embodiment of this disclosure. It is a block diagram which shows the example of the schematic functional structure of the 1st communication apparatus which concerns on embodiment of this disclosure. It is a block diagram which shows the example of the schematic hardware structure of the 1st communication apparatus which concerns on embodiment of this disclosure. It is a block diagram which shows the example of the schematic functional structure of the 2nd communication apparatus which concerns on embodiment of this disclosure. It is a block diagram which shows the example of the schematic hardware structure of the 2nd communication apparatus which concerns on embodiment of this disclosure. It is explanatory drawing for demonstrating the example of the 1st measurement which concerns on embodiment of this disclosure. It is explanatory drawing for demonstrating the example of the 2nd measurement which concerns on embodiment of this disclosure. It is explanatory drawing for demonstrating an example of reuse of a radio resource which concerns on embodiment of this disclosure. It is a sequence diagram for demonstrating the example of the schematic flow of the process which concerns on embodiment of this disclosure. It is a sequence diagram for demonstrating the example of the schematic flow of the process which concerns on the 4th modification of the Embodiment of this disclosure. It is explanatory drawing for demonstrating the example of the 3rd measurement which concerns on the 5th modification of the Embodiment of this disclosure. It is explanatory drawing which shows the specific example of each apparatus which concerns on 8th modification of the Embodiment of this disclosure. It is explanatory drawing which shows the example of the arrangement of each apparatus which concerns on 8th modification of the Embodiment of this disclosure. It is explanatory drawing for demonstrating the example of reuse of a radio resource which concerns on 8th modification of the Embodiment of this disclosure. It is a sequence diagram for demonstrating the example of the schematic flow of the process which concerns on 8th modification of the Embodiment of this disclosure. It is explanatory drawing which shows the example of the arrangement of each apparatus which concerns on the twelfth modification of the embodiment of this disclosure. It is explanatory drawing for demonstrating the example of the 4th measurement which concerns on the 13th modification of the embodiment of this disclosure. It is explanatory drawing for demonstrating the example of the 5th measurement which concerns on the 13th modification of the embodiment of this disclosure. It is explanatory drawing for demonstrating the example of the sixth measurement which concerns on the thirteenth modification of the embodiment of this disclosure.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, elements that can be similarly described may be designated by the same reference numerals, so that duplicate description may be omitted.

The explanations are given in the following order.
1. 1. System configuration 2. Configuration of relay device 3. Configuration of the first communication device 4. Configuration of the second communication device 5. Operation example 6. Modification example

<1. System configuration>
An example of the configuration of the system 1 according to the embodiment of the present disclosure will be described with reference to FIGS. 1 to 4. Referring to FIG. 1, the system 1 includes a relay device 100, a first communication device 200 and a second communication device 300.

For example, system 1 is a system that conforms to the technical specifications of 3GPP (Third Generation Partnership Project). More specifically, for example, the system 1 is a 5G or NR (New Radio) TS compliant system. Of course, system 1 is not limited to this example.

(1) Communication between devices For example, the relay device 100 communicates with the first communication device 200 and the second communication device 300. More specifically, for example, the relay device 100 communicates with the first communication device 200 at the first wireless link between the first communication device 200 and the relay device 100, and communicates with the second communication device 300. It communicates with the second communication device 300 on the second wireless link with the relay device 100.

For example, communication on a radio link is performed using a radio access network (RAN) protocol stack and an antenna. In other words, the radio link is formed by the RAN protocol stack and antenna.

For example, as shown in FIG. 2, the relay device 100 uses the first protocol stack 11 of the RAN and the antenna 181 to communicate with the first communication device 200 at the first radio link. The first communication device 200 uses the protocol stack 15 of the RAN and the antenna 281 to communicate with the relay device 100 on the first radio link.

For example, as shown in FIG. 2, the relay device 100 uses the second protocol stack 13 of the RAN and the antenna 185 to communicate with the second communication device 300 at the second radio link. The second communication device 300 uses the protocol stack 17 of the RAN and the antenna 381 to communicate with the relay device 100 on the second radio link.

For example, each of the first protocol stack 11 and the protocol stack 15 includes a physical (: Physical: PHY) layer, a MAC (Medium Access Control) layer, and an RLC (Radio Link Control) layer. Each of the first protocol stack 11 and the protocol stack 15 may further include one or more higher layers. The one or more upper layers may include a PDCP (Packet Data Convergence Protocol) layer. The one or more upper layers may include a SDAP (Service Data Adaptation Protocol) layer in the user plane, or may include an RRC (Radio Resource Control) layer in the control plane.

The description of the second protocol stack 13 and the protocol stack 17 is the same as the description of the first protocol stack 11 and the protocol stack 15. Therefore, a duplicate description will be omitted here. As a matter of course, the layer included in each of the second protocol stack 13 and the protocol stack 17 may be different from the layer included in each of the first protocol stack 11 and the protocol stack 15.

Each of the antenna 181 and the antenna 185, the antenna 281 and the antenna 381 may include a transmitting antenna and a receiving antenna, or may be an antenna common to transmitting and receiving.

(2) Specific Example of Device As a specific example, for example, as shown in FIG. 3, the first communication device 200 is a base station (for example, gNB), and the second communication device 300 is a UE. Further, for example, the relay device 100 is also a UE.

Further, as shown in FIG. 4, the relay device 100 may be an in-vehicle device mounted on the vehicle 20. More specifically, for example, the relay device 100 may be a V2X ECU (Electronic Control Unit). The second communication device 300 may be located in the vehicle 20. In this case, the antenna 181 may be outside the vehicle 20 and the antenna 185 may be inside the vehicle 20.

Although a four-wheeled vehicle is described as a vehicle 20 in FIG. 4, the vehicle 20 may be a two-wheeled vehicle, a three-wheeled vehicle, or a railroad vehicle. Alternatively, the relay device 100 may be mounted on a moving body other than the vehicle 20 (for example, a flying object such as a drone), and the antenna of the relay device 100 may be present inside or outside the moving body. Alternatively, the relay device 100 may be installed in a building, and the antenna of the relay device 100 may be present inside or outside the building.

The antenna 181 and the antenna 185 may be provided not in the relay device 100 itself but in a moving body (for example, a vehicle 20 or a flying body) or a building on which the relay device 100 is mounted. Alternatively, the relay device 100 may be a moving body (for example, a vehicle 20 or a flying body) or the building itself.

Of course, the relay device 100, the first communication device 200, and the second communication device 300 are not limited to the above-mentioned examples. A modification of this point will be described later.

<2. Relay device configuration>
An example of the configuration of the relay device 100 according to the embodiment of the present disclosure will be described with reference to FIGS. 5 and 6.

(1) Functional Configuration First, an example of the functional configuration of the relay device 100 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 5, the relay device 100 includes a first wireless communication unit 110, a second wireless communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 150.

-First wireless communication unit 110
The first wireless communication unit 110 wirelessly transmits and receives signals. For example, the first wireless communication unit 110 receives a signal from another device and transmits a signal to the other device. For example, the other device is the first communication device 200.

-Second wireless communication unit 120
The second wireless communication unit 120 wirelessly transmits and receives signals. For example, the second wireless communication unit 120 receives a signal from another device and transmits a signal to the other device. For example, the other device is the second communication device 300.

-Network communication unit 130
The network communication unit 130 receives a signal from the network to which the relay device 100 is connected, and transmits the signal to the network.

As an example, as shown in FIG. 4, the relay device 100 may be an in-vehicle device mounted on the vehicle 20, and the network may be an in-vehicle LAN (Local Area Network). In this case, in addition to the relay device 100, various sensors (for example, running state sensors, etc.), various ECUs (for example, engine control ECU, operation support ECU, etc.), operation switches, display devices, and the like are included in the network. It may be connected.

-Memory unit 140
The storage unit 140 temporarily or permanently stores programs and parameters for the operation of the relay device 100, as well as various data. The program includes one or more instructions for the operation of the relay device 100.

-Processing unit 150
The processing unit 150 provides various functions of the relay device 100. The processing unit 150 includes a first communication processing unit 151 and a second communication processing unit 153. The processing unit 150 may further include other components other than these components. That is, the processing unit 150 may perform operations other than the operations of these components. The specific operations of the first communication processing unit 151 and the second communication processing unit 153 will be described in detail later.

For example, the processing unit 150 (specifically, the first communication processing unit 151) processes the first protocol stack 11 shown in FIG. 2 and another device (for example, the first communication processing unit 110) via the first wireless communication unit 110. , Communicate with the first communication device 200). For example, the processing unit 150 (specifically, the second communication processing unit 153) processes the second protocol stack 13 shown in FIG. 2 and another device (for example, the second communication processing unit 120) via the second wireless communication unit 120. , Communicates with the second communication device 300). For example, the processing unit 150 communicates with another device connected to the network via the network communication unit 130.

If the relay device 100 is not connected to the network, the relay device 100 does not have to include the network communication unit 130.

(2) Hardware Configuration Next, with reference to FIG. 6, an example of the hardware configuration of the relay device 100 according to the embodiment of the present disclosure will be described. Referring to FIG. 6, the relay device 100 includes an antenna 181 and an RF (Radio Frequency) circuit 183, an antenna 185, an RF circuit 187, a processor 189, a network interface 191 and a memory 193.

For example, the processor 189 processes the first protocol stack 11 shown in FIG. 2 and communicates with another device (for example, the first communication device 200) via the antenna 181 and the RF circuit 183. Further, for example, the processor 189 processes the second protocol stack 13 shown in FIG. 2 and communicates with another device (for example, the second communication device 300) via the antenna 185 and the RF circuit 187.

The processor 189 may process one or more layers other than the RAN protocol stack (that is, the first protocol stack 11 and the second protocol stack 13). The one or more layers may include an internet layer, a transport layer and / or an application layer.

The processor 189 may be a single processor. Alternatively, the processor 189 may include a plurality of processors. As an example, the plurality of processors include a first baseband processor that processes the first protocol stack 11, a second baseband processor that processes the second protocol stack 13, and one or more of the above. It may include additional processors that process the layers.

The network interface 191 is, for example, a network adapter. The processor 189 communicates with a device connected to the network via the network interface 191.

Memory 193 stores a program executed by the processor 189, parameters related to the program, and various data. The memory 193 may be contained in the processor 189. The above program may be called an instruction.

The first wireless communication unit 110 can be mounted by the antenna 181 and the RF circuit 183. The second radio communication unit 120 may be implemented by the antenna 185 and the RF circuit 187. The network communication unit 130 may be implemented by the network interface 191. The storage unit 140 may be implemented by the memory 193. The processing unit 150 may be implemented by the processor 189.

If the relay device 100 is not connected to the above network, the relay device 100 does not have to be provided with the network interface 191.

Considering the above hardware configuration, for example, the relay device 100 has a memory for storing a program and one or more that executes the program to operate the first communication processing unit 151 and the second communication processing unit 153. Equipped with a processor. For example, the memory is memory 193, and the one or more processors is processor 189. The above program is a program for causing a computer to execute the operations of the first communication processing unit 151 and the second communication processing unit 153.

<3. Configuration of the first communication device>
An example of the configuration of the first communication device 200 according to the embodiment of the present disclosure will be described with reference to FIGS. 7 and 8.

(1) Functional Configuration First, an example of the functional configuration of the first communication device 200 according to the embodiment of the present disclosure will be described with reference to FIG. 7. Referring to FIG. 7, the first communication device 200 includes a wireless communication unit 210, a network communication unit 220, a storage unit 230, and a processing unit 240.

-Wireless communication unit 210
The wireless communication unit 210 wirelessly transmits and receives signals. For example, the wireless communication unit 210 receives a signal from another device and transmits a signal to the other device. For example, the other device is a relay device 100.

-Network communication unit 220
The network communication unit 220 receives a signal from the network to which the first communication device 200 is connected, and transmits the signal to the network.

For example, as shown in FIG. 3, when the first communication device 200 is a base station, the network is a backhaul.

-Memory unit 230
The storage unit 230 temporarily or permanently stores programs and parameters for the operation of the first communication device 200, as well as various data. The program includes one or more instructions for the operation of the first communication device 200.

-Processing unit 240
The processing unit 240 provides various functions of the first communication device 200. The processing unit 240 includes a communication processing unit 241 and a control unit 243. The processing unit 240 may further include other components other than these components. That is, the processing unit 240 may perform operations other than the operations of these components. The specific operations of the communication processing unit 241 and the control unit 243 will be described in detail later.

For example, the processing unit 240 (specifically, the communication processing unit 241) processes the protocol stack 15 shown in FIG. 2 and communicates with another device (for example, the relay device 100) via the wireless communication unit 210. do. For example, the processing unit 240 communicates with another device connected to the network via the network communication unit 220.

If the first communication device 200 is not connected to the network, the first communication device 200 does not have to include the network communication unit 220.

(2) Hardware Configuration Next, with reference to FIG. 8, an example of the hardware configuration of the first communication device 200 according to the embodiment of the present disclosure will be described. Referring to FIG. 8, the first communication device 200 includes an antenna 281, an RF circuit 283, a processor 285, a network interface 287, and a memory 289.

For example, the processor 285 processes the protocol stack 15 shown in FIG. 2 and communicates with another device (for example, the relay device 100) via the antenna 281 and the RF circuit 283.

The processor 285 may process one or more layers other than the RAN protocol stack (that is, the protocol stack 15). The one or more layers may include an internet layer, a transport layer and / or an application layer.

The processor 285 may be a single processor. Alternatively, the processor 285 may include a plurality of processors. As an example, the plurality of processors may include a baseband processor for processing the protocol stack 15 and an additional processor for processing the one or more layers.

The network interface 287 is, for example, a network adapter. The processor 285 communicates with a device connected to the network via the network interface 287.

The memory 289 stores a program executed by the processor 285, parameters related to the program, and various data. The memory 289 may be contained in the processor 285. The above program may be called an instruction.

The wireless communication unit 210 can be mounted by the antenna 281 and the RF circuit 283. The network communication unit 220 may be implemented by the network interface 287. The storage unit 230 may be mounted by the memory 289. The processing unit 240 may be implemented by the processor 285.

If the first communication device 200 is not connected to the network, the first communication device 200 does not have to include the network interface 287.

Considering the above hardware configuration, for example, the first communication device 200 includes a memory for storing a program and one or more processors for executing the program to operate the communication processing unit 241 and the control unit 243. To prepare for. For example, the memory is memory 289, and the one or more processors is processor 285. The above program is a program for causing a computer to execute the operations of the communication processing unit 241 and the control unit 243.

<4. Configuration of the second communication device>
An example of the configuration of the second communication device 300 according to the embodiment of the present disclosure will be described with reference to FIGS. 9 and 10.

(1) Functional Configuration First, an example of the functional configuration of the second communication device 300 according to the embodiment of the present disclosure will be described with reference to FIG. 9. Referring to FIG. 9, the second communication device 300 includes a wireless communication unit 310, a network communication unit 320, a storage unit 330, and a processing unit 340.

-Wireless communication unit 310
The wireless communication unit 310 wirelessly transmits and receives signals. For example, the wireless communication unit 310 receives a signal from another device and transmits a signal to the other device. For example, the other device is a relay device 100.

-Network communication unit 320
The network communication unit 320 receives a signal from the network to which the second communication device 300 is connected, and transmits the signal to the network.

-Memory unit 330
The storage unit 330 temporarily or permanently stores programs and parameters for the operation of the second communication device 300, as well as various data. The program includes one or more instructions for the operation of the second communication device 300.

-Processing unit 340
The processing unit 340 provides various functions of the second communication device 300. The processing unit 340 includes a communication processing unit 341 and a control unit 343. The processing unit 340 may further include other components other than these components. That is, the processing unit 340 may perform operations other than the operations of these components. The specific operations of the communication processing unit 341 and the control unit 343 will be described in detail later.

For example, the processing unit 340 (specifically, the communication processing unit 341) processes the protocol stack 17 shown in FIG. 2 and communicates with another device (for example, the relay device 100) via the wireless communication unit 310. do. For example, the processing unit 340 communicates with another device connected to the network via the network communication unit 320.

If the second communication device 300 is not connected to the network, the second communication device 300 does not have to include the network communication unit 320.

(2) Hardware Configuration Next, with reference to FIG. 10, an example of the hardware configuration of the second communication device 300 according to the embodiment of the present disclosure will be described. Referring to FIG. 10, the second communication device 300 includes an antenna 381, an RF circuit 383, a processor 385, a network interface 387, and a memory 389.

For example, the processor 385 processes the protocol stack 17 shown in FIG. 2 and communicates with another device (for example, the relay device 100) via the antenna 381 and the RF circuit 383.

The processor 385 may process one or more layers other than the RAN protocol stack (that is, the protocol stack 17). The one or more layers may include an internet layer, a transport layer and / or an application layer.

The processor 385 may be a single processor. Alternatively, the processor 385 may include a plurality of processors. As an example, the plurality of processors may include a baseband processor that processes the protocol stack 17 and an additional processor that processes the one or more layers.

The network interface 387 is, for example, a network adapter. The processor 385 communicates with a device connected to the network via the network interface 387.

The memory 389 stores a program executed by the processor 385, parameters related to the program, and various data. The memory 389 may be contained within the processor 385. The above program may be called an instruction.

The wireless communication unit 310 can be mounted by the antenna 381 and the RF circuit 383. The network communication unit 320 may be implemented by the network interface 387. The storage unit 330 may be implemented by the memory 389. The processing unit 340 may be implemented by the processor 385.

If the second communication device 300 is not connected to the network, the second communication device 300 does not have to include the network interface 387.

Considering the above hardware configuration, for example, the second communication device 300 includes a memory for storing a program and one or more processors for executing the program to operate the communication processing unit 341 and the control unit 343. To prepare for. For example, the memory is a memory 389, and the one or more processors is a processor 385. The above program is a program for causing a computer to execute the operations of the communication processing unit 341 and the control unit 343.

<5. Operation example>
An example of the operation of the relay device 100, the first communication device 200, and the second communication device 300 according to the embodiment of the present disclosure will be described with reference to FIGS. 11 to 14.

(1) Wireless Link-First Wireless Link The relay device 100 (first communication processing unit 151) is a first communication device in the first wireless link between the first communication device 200 and the relay device 100. The signal to the 200 is transmitted, and the first communication device 200 (communication processing unit 241) receives the signal from the relay device 100 at the first wireless link.

The first communication device 200 (communication processing unit 241) transmits a signal to the relay device 100 at the first radio link, and the relay device 100 (first communication processing unit 151) transmits the signal to the relay device 100. At the link, the signal from the first communication device 200 is received.

For example, as shown in FIG. 2, the relay device 100 (first communication processing unit 151) uses the first protocol stack 11 and the antenna 181 to perform transmission and reception on the first wireless link. .. For example, as shown in FIG. 2, the first communication device 200 (communication processing unit 241) uses the protocol stack 15 and the antenna 281 to perform transmission and reception on the first radio link. In other words, the first radio link is formed by the first protocol stack 11 and the antenna 181 and the protocol stack 15 and the antenna 281.

-The second wireless link relay device 100 (second communication processing unit 153) sends a signal to the second communication device 300 at the second wireless link between the second communication device 300 and the relay device 100. The second communication device 300 (communication processing unit 341) receives the signal from the relay device 100 at the second wireless link.

The second communication device 300 (communication processing unit 341) transmits a signal to the relay device 100 at the second radio link, and the relay device 100 (second communication processing unit 153) transmits the signal to the relay device 100. At the link, the signal from the second communication device 300 is received.

For example, as shown in FIG. 2, the relay device 100 (second communication processing unit 153) uses the second protocol stack 13 and the antenna 185 to perform transmission and reception on the second radio link. .. For example, as shown in FIG. 2, the second communication device 300 (communication processing unit 341) uses the protocol stack 17 and the antenna 381 to perform transmission and reception on the second radio link. In other words, the second radio link is formed by the second protocol stack 13 and the antenna 185, and the protocol stack 17 and the antenna 381.

(2) First measurement The relay device 100 (first communication processing unit 151) transmits the first target signal at the first wireless link. The relay device 100 (second communication processing unit 153) receives the first target signal at the second radio link, and performs the first measurement based on the first target signal. This makes it possible to know, for example, self-interference from the first radio link in the relay device 100 to the second radio link.

For example, referring to FIG. 11, the relay device 100 (first communication processing unit 151) uses the first protocol stack 11 and the antenna 181 to transmit the first target signal 30. The first target signal 30 is radiated from the antenna 181 as a radio signal and reaches not only the first communication device 200 but also the antenna 185 of the relay device 100 itself. The relay device 100 (second communication processing unit 153) receives the first target signal 30 using the antenna 185 and the second protocol stack 13, and performs the first measurement based on the first target signal 30. ..

As described with reference to FIG. 3, for example, the first communication device 200 is a base station, and each of the relay device 100 and the second communication device 300 is a UE. In this case, the first radio link is an access link (that is, a downlink and an uplink), and the second radio link is a side link. In other words, the first wireless link may be a Uu interface wireless link, and the second wireless link may be a PC5 interface wireless link. In this case, the relay device 100 (first communication processing unit 151) transmits the first target signal 30 via the uplink. Further, the relay device 100 (second communication processing unit 153) receives the first target signal 30 at the side link and performs the first measurement based on the first target signal 30.

-Wireless resource For example, the relay device 100 (first communication processing unit 151) uses the radio resource allocated to the relay device 100 but not assigned to another device, and uses the first radio resource. Sends the target signal of. This makes it possible to know more accurate self-interference from the first radio link in the relay device 100 to the second radio link.

-First target signal As an example, the first target signal is a reference signal. More specifically, for example, the reference signal is a sounding reference signal (SRS). Alternatively, the reference signal may not be a reference signal to the first communication device 200, but may be a reference signal dedicated to the first measurement by the relay device 100. The reference signal facilitates, for example, the first measurement of the first target signal.

As another example, the first target signal may be a data signal or a control signal to the first communication device 200. Since the relay device 100 knows the sequence of signals transmitted by itself, the relay device 100 can perform the first measurement based on the data signal or control signal transmitted by itself. This makes it possible, for example, to make the first measurement more flexibly without restrictions.

-Contents of the first measurement For example, the first measurement is a measurement of attenuation of the first target signal. The attenuation can also be said to be the attenuation of the signal from the first radio link to the second radio link. As an example, the measurement of the attenuation is the measurement of the attenuation rate of the first target signal. For example, the attenuation factor is obtained by dividing the received power of the first target signal by the transmission power of the first target signal.

Of course, the measurement of the attenuation is not limited to this example. As an example, the measurement of the attenuation may be a measurement of propagation loss (propagation loss / path loss). As another example, the measurement of the attenuation may be a measurement of an attenuation coefficient representing a change in power and phase of the first target signal from transmission to reception of the first target signal.

From the above measurement, for example, it becomes possible to know the degree of self-interference from the first radio link to the second radio link in the relay device 100.

-Configuration information For example, the relay device 100 (first communication processing unit 151 or second communication processing unit 153) is used for transmitting the first target signal and for the first measurement based on the first target signal. Receive an RRC message containing configuration information. Then, the relay device 100 (first communication processing unit 151) transmits the first target signal based on the configuration information, and the relay device 100 (second communication processing unit 153) is based on the configuration information. Then, the first measurement is performed based on the first target signal.

This makes it possible to flexibly control, for example, the transmission of the first target signal and the first measurement by the relay device 100.

For example, as shown in FIG. 3, the first communication device 200 is a base station. In this case, for example, the first communication device 200 (communication processing unit 241) transmits the RRC message to the relay device 100, and the relay device 100 (first communication processing unit 151) sends the RRC message to the first relay device 100. Received from the communication device 200 of.

The configuration information may include a first configuration information for transmitting the first target signal and a second configuration information for the first measurement based on the first target signal.

The transmission of the first target signal by the relay device 100 and the first measurement based on the first target signal have been described above. This makes it possible to know, for example, self-interference from the first radio link in the relay device 100 to the second radio link. Therefore, as will be described later, the reuse of wireless resources between the two wireless links of the relay device 100 becomes easy.

(3) Second measurement The second communication device 300 (communication processing unit 341) transmits a second target signal at the second radio link. The relay device 100 (second communication processing unit 153) receives the second target signal from the second communication device 300 at the second radio link, and makes a second measurement based on the second target signal. I do. This makes it possible to know, for example, the propagation status of the signal in the second radio link.

For example, referring to FIG. 12, the second communication device 300 (communication processing unit 341) transmits the second target signal 40 by using the protocol stack 17 and the antenna 381. The relay device 100 (second communication processing unit 153) receives the second target signal 40 using the antenna 185 and the second protocol stack 13, and makes a second measurement based on the second target signal 40. ..

As described with reference to FIG. 3, for example, each of the relay device 100 and the second communication device 300 is a UE. In this case, the second radio link is a side link. In other words, the second wireless link is a wireless link of the PC5 interface. In this case, the second communication device 300 (communication processing unit 341) transmits the second target signal 40 by the side link, and the relay device 100 (second communication processing unit 153) is the second by the side link. The target signal 40 of the above is received, and a second measurement is performed based on the second target signal 40.

-Wireless resource For example, the second communication device 300 (communication processing unit 341) uses the radio resource allocated to the second communication device 300 but not assigned to another device. , The second target signal is transmitted.

-Second target signal For example, the second target signal is a reference signal from the second communication device 300. This facilitates, for example, a second measurement of the second target signal.

-Contents of the second measurement For example, the second measurement is a measurement of attenuation of the second target signal. The attenuation can also be said to be the attenuation of the signal in the second radio link. As an example, the measurement of the attenuation is the measurement of the attenuation rate of the second target signal. For example, the attenuation factor is obtained by dividing the received power of the second target signal by the transmission power of the second target signal. For example, the relay device 100 (second communication processing unit 153) receives information indicating the transmission power of the second target signal from the second communication device 300.

Of course, the measurement of the attenuation is not limited to this example. As an example, the measurement of the attenuation may be a measurement of propagation loss (propagation loss / path loss). As another example, the measurement of the attenuation may be a measurement of an attenuation coefficient representing a change in power and phase of the second target signal from transmission to reception of the second target signal.

From the above measurement, for example, it becomes possible to know the degree of signal attenuation in the above second radio link.

-Configuration Information For example, the second communication device 300 (communication processing unit 341) receives an RRC message including configuration information for transmitting the second target signal. The second communication device 300 (communication processing unit 341) transmits the second target signal based on the configuration information.

The relay device 100 (first communication processing unit 151 or second communication processing unit 153) receives an RRC message including configuration information for the second measurement based on the second target signal. The relay device 100 (second communication processing unit 153) performs the second measurement based on the second target signal based on the configuration information.

This makes it possible to flexibly control, for example, the transmission of the second target signal by the second communication device 300 and the second measurement by the relay device 100.

For example, as shown in FIG. 3, the first communication device 200 is a base station. In this case, for example, the above-mentioned RRC message is transmitted by, for example, the first communication device 200.

The transmission of the second target signal by the second communication device 300 and the second measurement based on the second target signal by the relay device 100 have been described above. This makes it possible to know, for example, the propagation status of the signal in the second radio link.

(4) Transmission of control information For example, the relay device 100 (second communication processing unit 153) transfers the result of the first measurement and the control information obtained from the result of the second measurement to the second communication device 300. Send.

-Control information For example, the control information is information regarding the transmission power (for example, the minimum transmission power) of the second communication device 300. More specifically, for example, the transmission power is used to make the quality of the signal transmitted from the second communication device 300 to the relay device 100 on the second radio link higher than the desired quality. The transmission power of the communication device 300 (for example, the minimum transmission power). As an example, the above-mentioned quality is SINR (Signal Interference plus Noise Ratio), and the above-mentioned desired quality is a desired SINR.

Specifically, for example, as described above, the first measurement is the measurement of the attenuation of the first target signal, and the second measurement is the measurement of the attenuation of the second target signal. be. In this case, for example, the result of the first measurement is the attenuation factor γ, and the result of the second measurement is the attenuation factor X. Here, the transmission power of the second communication device 300 in the second wireless link is PTX, and the transmission power of the relay device 100 in the first wireless link is QTX. In this case, in the second wireless link, the received power PRX of the signal from the second communication device 300 is PTX × X, and the received power QRX of the signal from the relay device 100 itself is QTX × γ. be. Further, assuming that the noise is N, the SINR of the second radio link can be expressed as PRX / (QRX + N), that is, (PTX × X) / (QTX × γ + N). The relay device 100 calculates the transmission power PTX of the second communication device 300 so that the SINR is equal to or higher than the desired SINR, SINRTH. That is, the relay device 100 calculates the PTX so that PTX ≧ SINRTH × (QTX × γ + N) / X. As described above, the attenuation factor γ is obtained as a result of the first measurement, and the attenuation factor X is obtained as a result of the second measurement. The transmission power QTX is a value known to the relay device 100. SINRTH may be a predetermined value, or may be a value configured by the base station (that is, the first communication device 200). The noise N may be a predetermined value or may be a statistical value held by the relay device 100. The relay device 100 transmits control information indicating the transmission power PTX to the second communication device 300.

Of course, the above control information is not limited to this example. As an example, the control information is other information for converting the transmission power of the second communication device 300 into the transmission power PTX (for example, the difference between the transmission power PTX calculated as described above and the current transmission power). There may be.

For example, the second communication device 300 (communication processing unit 341) receives the control information. The second communication device 300 (control unit 343) controls the transmission power of the second communication device 300 in the second wireless link based on the control information. Specifically, for example, the second communication device 300 (control unit 343) sets the transmission power of the second communication device 300 to be equal to or higher than the transmission power indicated by the control information (for example, the minimum transmission power). To set.

-Transmission For example, the relay device 100 (second communication processing unit 153) transmits the control information in the control message of the layer included in the second protocol stack 13.

The above layer may be a PHY layer. In this case, the control message may be SCI (Sidelink Control Information).

The above layer may be a MAC layer. In this case, the control message may be a MAC control element.

The above layer may be an RRC layer. In this case, the control message may be an RRC message.

The transmission of the above control information has been explained above. Thereby, for example, even if there is a transmission of the relay device 100 on the first wireless link, the signal from the second communication device 300 on the second wireless link can be received by the relay device 100 with a desired quality. In addition, it becomes possible to control the transmission power of the second communication device 300. Therefore, as will be described later, the reuse of wireless resources between the two wireless links of the relay device 100 becomes easy.

(5) Reuse of radio resources For example, the radio resource of one of the two radio links of the relay device 100 is reused in the other of the two radio links.

As described with reference to FIG. 3, for example, the first communication device 200 is a base station, and each of the relay device 100 and the second communication device 300 is a UE. In this case, the first radio link is an access link (that is, a downlink and an uplink), and the second radio link is a side link. For example, the first communication device 200 (control unit 243) allocates the radio resource of the first radio link and also allocates the radio resource of the second radio link. In particular, as shown in FIG. 13, the first communication device 200 (control unit 243) allocates a radio resource (that is, an uplink resource) for transmission from the relay device 100 to the first communication device 200. , The radio resource is also allocated for transmission from the second communication device 300 to the relay device 100. That is, the uplink resource is reused in the sidelink.

Even when the radio resources are reused as described above, the transmission power of the decoy second communication device 300 is controlled, so that the relay device 100 is a signal from the second communication device 300. Can be received with the desired quality.

(6) Process Flow An example of the process according to the embodiment of the present disclosure will be described with reference to FIG.

The relay device 100 (first communication processing unit 151) transmits the first target signal on the first wireless link between the first communication device 200 and the relay device 100 (S410).

The relay device 100 (second communication processing unit 153) receives the first target signal at the second wireless link between the second communication device 300 and the relay device 100, and becomes the first target signal. The first measurement based on this is performed (S420).

The second communication device 300 (communication processing unit 341) transmits a second target signal on the second wireless link (S430).

The relay device 100 (second communication processing unit 153) receives the second target signal at the second wireless link, and performs a second measurement based on the second target signal (S440).

The relay device 100 (second communication processing unit 153) transmits the result of the first measurement and the control information obtained from the result of the second measurement to the second communication device 300 (S450).

The second communication device 300 (control unit 343) controls the transmission power of the second communication device 300 in the second wireless link based on the control information.

<6. Modification example>
The first to thirteenth modifications according to the embodiment of the present disclosure will be described with reference to FIGS. 15 to 24. In addition, two or more of these modified examples may be combined.

(1) First Modified Example: Measurement In the above-mentioned example of the embodiment of the present disclosure, the first measurement is the measurement of the attenuation of the first target signal, and the second measurement is the second measurement. It is a measurement of the attenuation of the target signal of 2. However, of course, the measurements according to the embodiments of the present disclosure are not limited to this example.

In the first modification, the first measurement may be the measurement of the received power of the first target signal, and the second measurement may be the measurement of the received power of the second target signal. There may be.

In this case, for example, the result of the first measurement is the received power PRX, and the result of the second measurement is the received power QRX. Here, assuming that the power is controlled by multiplying the transmission power of the second communication device 300 by α, the received power is PRX × α, and the SINR of the second radio link is (PRX × α) / (. QRX + N). The relay device 100 may calculate the coefficient α so that the SINR is equal to or higher than the desired SINR, SINRTH. That is, the relay device 100 may calculate the coefficient α so that α ≧ SINRTH × (QRX + N) / PRX. As described above, the received power PRX is obtained as a result of the first measurement, and the received power QRX is obtained as a result of the second measurement. As described above, SINRTH may be a predetermined value, or may be a value configured by the base station (that is, the first communication device 200). The noise N may be a predetermined value or may be a statistical value held by the relay device 100. The relay device 100 may transmit control information indicating a coefficient α for the transmission power of the second communication device 300 to the second communication device 300.

The second communication device 300 (communication processing unit 341) receives the control information, and the second communication device 300 (control unit 343) receives the control information, and the second communication device 300 (control unit 343) is based on the control information (that is, the coefficient α). The transmission power of the second communication device 300 in the wireless link may be controlled. Specifically, the second communication device 300 (control unit 343) may set the transmission power of the second communication device 300 to be α times or more.

Thereby, for example, the relay device 100 can perform the measurement based on the second target signal from the second communication device 300 and the measurement of the second communication device 300 without knowing the transmission power of the second communication device 300. It becomes possible to control the transmission power.

The first measurement and the second measurement may be the measurement of the attenuation of the first target signal and the measurement of the received power of the second target signal, respectively. Alternatively, the first measurement and the second measurement may be the measurement of the received power of the first target signal and the measurement of the attenuation of the second target signal, respectively.

(2) Second Modification Example: Control Information In the above-mentioned example of the embodiment of the present disclosure, the control information is information regarding the transmission power (for example, the minimum transmission power) of the second communication device 300. However, as a matter of course, the control information according to the embodiment of the present disclosure is not limited to this example.

In the second modification, the control information may include the first measurement information indicating the result of the first measurement and the second measurement information indicating the result of the second measurement. Further, the control information may include other information necessary for controlling the transmission power of the second communication device 300. The other information indicates information indicating the desired SINR (that is, SINRTH), information indicating the transmission power (that is, QTX) of the relay device 100 in the first radio link, and noise (that is, N). It may contain one or more of the information.

The second communication device 300 may control the transmission power of the second communication device 300 in the second wireless link based on the control information. Specifically, the second communication device 300 may perform the calculation based on the result of the first measurement and the result of the second measurement as described above instead of the relay device 100.

This makes it possible to reduce the processing of the relay device 100, for example.

(3) Third Modification Example: Control of Transmission Power of Relay Device 100 In the third modification, the relay device 100 (first communication processing unit 141) has the result of the first measurement and the second measurement. The transmission power of the relay device 100 in the first wireless link may be controlled according to the result of the above. The transmission power may be the maximum transmission power of the relay device 100 in the first wireless link.

As an example, in the relay device 100, the transmission power of the second communication device 300 in the second wireless link is set to PTX so that PTX ≧ SINRTH × (QTX × γ + N) / X, and the first wireless link is described. The transmission power QTX of the relay device 100 in the above may be determined. The relay device 100 (first communication processing unit 141) may set the transmission power of the relay device 100 in the first wireless link to be QTX or less.

As another example, the transmission power of the second communication device 300 may be controlled by multiplying by α, and the transmission power of the relay device 100 may be controlled by multiplying by β. In this case,
The relay device 100 may determine the coefficient α and the coefficient β so that α ≧ SINRTH × (QRX × β + N) / PRX. The relay device 100 (first communication processing unit 141) may be set so that the transmission power of the relay device 100 in the first wireless link is β times or less.

This makes it possible to more flexibly adjust the transmission power of the second communication device 300, for example.

The relay device 100 (first communication processing unit 141) has the quality of the signal transmitted from the relay device 100 to the first communication device 200 in the first wireless link and the second in the second wireless link. The above control may be performed so that the quality of the signal transmitted from the communication device 300 to the relay device 100 is equal to or higher than the desired quality. As an example, the relay device 100 (first communication processing unit 141) may perform the above control so that the qualities of both are the same or higher than the desired quality.

Thereby, for example, data can be more efficiently transmitted from the second communication device 300 to the first communication device 200 via the relay device 100.

(4) Fourth Modification Example: Transmission of Control Information In the above-described example of the embodiment of the present disclosure, the relay device 100 (second communication processing unit 153) transmits the control information to the second communication device 300. .. However, of course, the embodiments of the present disclosure are not limited to this example.

In the fourth modification, the relay device 100 (first communication processing unit 151) may transmit the control information to the first communication device 200.

In the fourth modification, the first communication device 200 may control at least one transmission power of the relay device 100 and the second communication device 300. Specifically, the first communication device 200 (communication processing unit 241) may receive the control information from the relay device 100. Based on the control information, the first communication device 200 (control unit 243) determines the transmission power of the relay device 100 in the first wireless link or the second communication device 300 in the second wireless link. The transmission power may be controlled.

Even in such a fourth modification, the reuse of wireless resources between the two wireless links of the relay device 100 becomes easy, as in the above-described example of the embodiment of the present disclosure.

-Control information As described as the second modification, the control information includes the first measurement information indicating the result of the first measurement and the second measurement information indicating the result of the second measurement. May include. Further, the control information may include other information necessary for controlling the transmission power of the second communication device 300. The control information may also include other information necessary for controlling the transmission power of the relay device 100.

Alternatively, as in the above-mentioned example of the embodiment of the present disclosure, the control information may be information regarding the transmission power (for example, the minimum transmission power) of the second communication device 300.

-Control of transmission power --- Transmission power The transmission power of the relay device 100, which is the target of the control, may be the maximum transmission power of the relay device 100 in the first wireless link.

The transmission power of the second communication device 300, which is the target of the control, may be the minimum transmission power of the second communication device 300 in the second wireless link.

Thereby, for example, the reception power of the signal from the second communication device 300 can be secured while suppressing the self-interference of the relay device 100.

--Generation and transmission of power control information The first communication device 200 (control unit 243) controls the transmission power of the relay device 100 or the transmission power of the second communication device 300 as the control. Control information may be generated. The first communication device 200 (communication processing unit 241) may transmit the power control information to the relay device 100 or the second communication device 300.

For example, the power control information includes a first power control information for controlling the transmission power of the relay device 100 and a second power control information for controlling the transmission power of the second communication device 300. May include.

This allows, for example, the first communication device 200 to actually control the transmission power of the relay device 100 or the second communication device 300.

The first communication device 200 (communication processing unit 241) transmits the first power control information and the second power control information to the relay device 100, and the relay device 100 (second communication processing unit 153). However, the second power control information may be transmitted to the second communication device 300. Alternatively, the first communication device 200 (communication processing unit 241) may directly transmit the second power control information to the second communication device 300.

--Example of control The first communication device 200 (control unit 243) has the quality of the signal transmitted from the relay device 100 to the first communication device 200 in the first radio link and the second radio link. The above control may be performed so that the quality of the signal transmitted from the second communication device 300 to the relay device 100 is equal to or higher than the desired quality. As an example, the first communication device 200 (control unit 243) may perform the above control so that both qualities are the same quality equal to or higher than the desired quality.

Thereby, for example, data can be more efficiently transmitted from the second communication device 300 to the first communication device 200 via the relay device 100.

-Processing Flow An example of processing according to the embodiment of the present disclosure will be described with reference to FIG.

The relay device 100 (first communication processing unit 151) transmits the first target signal on the first wireless link between the first communication device 200 and the relay device 100 (S510).

The relay device 100 (second communication processing unit 153) receives the first target signal at the second wireless link between the second communication device 300 and the relay device 100, and becomes the first target signal. The first measurement based on this is performed (S520).

The second communication device 300 (communication processing unit 341) transmits a second target signal on the second wireless link (S530).

The relay device 100 (second communication processing unit 153) receives the second target signal at the second wireless link, and performs a second measurement based on the second target signal (S540).

The relay device 100 (second communication processing unit 153) transmits the result of the first measurement and the control information obtained from the result of the second measurement to the first communication device 200 (S550).

Based on the control information, the first communication device 200 (control unit 243) transmits the transmission power of the relay device 100 in the first wireless link and the transmission of the second communication device 300 in the second wireless link. Generates power control information for controlling power (S560). The power control information includes a first power control information for controlling the transmission power of the relay device 100 and a second power control information for controlling the transmission power of the second communication device 300. ..

The first communication device 200 (communication processing unit 241) transmits the power control information to the relay device 100 (S570).

The relay device 100 (second communication processing unit 153) transmits the second power control information to the second communication device 300 (S580).

The relay device 100 (first communication processing unit 151) controls the transmission power of the relay device 100 in the first wireless link based on the first power control information. The second communication device 300 (control unit 343) controls the transmission power of the second communication device 300 in the second wireless link based on the second power control information.

(5) Fifth Modification Example: Stopping Relay In the fifth modification, in addition to the fourth modification, relay by the relay device 100 may be stopped.

-Third measurement The second communication device 300 (communication processing unit 341) may transmit a third target signal. The first communication device 200 (communication processing unit 241) may receive the third target signal from the second communication device 300 and perform a third measurement based on the third target signal.

For example, referring to FIG. 16, the second communication device 300 (communication processing unit 341) may transmit the third target signal 50 by using the protocol stack 17 and the antenna 381. The first communication device 200 (communication processing unit 241) may receive the third target signal 50 by using the antenna 281 and the protocol stack 15, and makes a third measurement based on the third target signal 50. You may go.

The third measurement may be a measurement of attenuation of the third target signal. In this case, the result of the third measurement may be a damping factor Y.

Alternatively, the third measurement may be a measurement of the received power of the third target signal. In this case, the result of the third measurement may be the received power RRX.

-Stop relay (first example)
As a first example, in the first communication device 200 (control unit 243), the quality of the signal directly transmitted from the second communication device 300 to the first communication device 200 is higher than the desired quality. In this case, the relay by the relay device 100 for the second communication device 300 may be stopped. In other words, if the desired quality can be obtained by direct transmission, the relay by the relay device 100 may be stopped.

For example, the above-mentioned desired quality may be the above-mentioned SINRTH. For example, the first communication device 200 (control unit 243) determines the quality of the signal directly transmitted from the second communication device 300 to the first communication device 200 (for example, based on the result of the third measurement). SINR) may be calculated.

This makes it possible, for example, to reduce the number of forced relays.

-Stop relay (second example)
As described above in the fourth modification, the first communication device 200 (control unit 243) determines the quality of the signal transmitted from the relay device 100 to the first communication device 200 in the first wireless link. The control may be performed so that the quality of the signal transmitted from the second communication device 300 to the relay device 100 in the second wireless link is equal to or higher than the desired quality.

In particular, the desired quality may be the quality of the signal transmitted directly from the second communication device 300 to the first communication device 200. For example, the first communication device 200 (control unit 243) determines the quality of the signal directly transmitted from the second communication device 300 to the first communication device 200 (for example, based on the result of the third measurement). SINR) may be calculated.

Based on the above points, as a second example, the first communication device 200 (control unit 243) has the transmission power (for example, the minimum transmission power) of the second communication device 300 in the second radio link. However, when it becomes larger than the transmission power (for example, the maximum transmission power) of the relay device 100 in the first wireless link, the relay by the relay device 100 for the second communication device 300 may be stopped. .. In other words, in order to obtain the same quality as the direct transmission, if the transmission power of the second communication device 300 exceeds the transmission power of the relay device 100, the relay by the relay device 100 may be stopped. ..

This makes it possible, for example, to reduce the number of forced relays.

-Stop Method The first communication device 200 (control unit 243) may generate stop information for stopping the relay by the relay device 100 for the second communication device 300. The first communication device 200 (communication processing unit 241) may transmit the stop information to the relay device 100. The relay device 100 may stop the relay for the second communication device 300 based on the stop information.

(6) Sixth Modification Example: Specific Example of Each Device In the above-mentioned example of the embodiment of the present disclosure, as described with reference to FIG. 3, the first communication device 200 is a base station, and the second communication device 200 is a base station. The communication device 300 is a UE, and the relay device 100 is also a UE. However, of course, the embodiments of the present disclosure are not limited to this example.

In the sixth modification, the relay device 100 may be an IAB (Integrated Access and Backhaul) node, and the first communication device 200 may be an IAB donor. The first wireless link may be a backhaul link, and the second wireless link may be an access link. In other words, the first radio link may be a radio link of the F1 interface, and the second radio link may be a radio link of the Uu interface.

The first communication device 200 may be an IAB node instead of an IAB donor, or may be connected to an IAB donor (or an upstream IAB node). In this case, the first communication device 200 may include an additional wireless communication unit and an additional communication processing unit in addition to the wireless communication unit 210 and the communication processing unit 241 shown in FIG. 7. Further, the first communication device 200 may include an additional antenna and an additional RF circuit in addition to the antenna 281 and the RF circuit 283 shown in FIG.

The operation of the relay device 100, the first communication device 200, and the second communication device 300 in the sixth modification is, for example, the same as the operation in the above-mentioned example or any one modification of the embodiment of the present disclosure. Is.

(7) Seventh Modification Example: Specific Example of Each Device In the sixth modification described above, the first communication device 200 is an IAB donor (or IAB node), and the relay device 100 is an IAB node. The communication device 300 of 2 is a UE. However, of course, the embodiments of the present disclosure are not limited to this example.

In the seventh modification, the second communication device 300 may also be an IAB node. That is, in the seventh modification, the first communication device 200 may be an IAB donor (or IAB node), and the relay device 100 and the second communication device 300 may be an IAB node. The first radio link and the second radio link may be backhaul links. In other words, the first radio link and the second radio link may be radio links of the F1 interface.

Note that the UE or the downstream IAB node may be connected to the second communication device 300. Therefore, the second communication device 300 may include an additional wireless communication unit and an additional communication processing unit in addition to the wireless communication unit 310 and the communication processing unit 341 shown in FIG. Further, the second communication device 300 may include an additional antenna and an additional RF circuit in addition to the antenna 381 and the RF circuit 383 shown in FIG.

The operation of the relay device 100, the first communication device 200, and the second communication device 300 in the seventh modification is, for example, the same as the operation in the above-mentioned example or any one of the above-described embodiments of the present disclosure. Is.

(8) Eighth Modification Example: Specific Example of Each Device In the above-mentioned example of the embodiment of the present disclosure, as described with reference to FIG. 3, the first communication device 200 is a base station, and the second communication device 200 is a base station. The communication device 300 is a UE, and the relay device 100 is also a UE. However, of course, the embodiments of the present disclosure are not limited to this example.

In the eighth modification, as shown in FIG. 17, the first communication device 200 may be a UE, and the second communication device 300 may be a base station. The relay device 100 may be a UE. The first wireless link may be a side link, and the second wireless link may be an access link. In other words, the first wireless link may be a wireless link of the PC5 interface, and the second wireless link may be a wireless link of the Uu interface.

Further, as shown in FIG. 18, the relay device 100 may be an in-vehicle device mounted on the vehicle 20. The first communication device 200 may be located in the vehicle 20. In this case, the antenna 181 may be inside the vehicle 20 and the antenna 185 may be outside the vehicle 20.

Also in the eighth modification, similarly to the above-mentioned example of the embodiment of the present disclosure, the relay device 100 (second communication processing unit 153) is obtained from the result of the first measurement and the result of the second measurement. The control information may be transmitted to the second communication device 300.

In the eighth modification, the second communication device 300 may control at least one transmission power of the relay device 100 and the second communication device 300. Specifically, the second communication device 300 (communication processing unit 341) may receive the control information from the relay device 100. The second communication device 300 (control unit 343) uses the transmission power of the relay device 100 in the first wireless link or the second communication device 300 in the second wireless link based on the control information. The transmission power may be controlled.

Even in such an eighth modification, the reuse of wireless resources between the two wireless links of the relay device 100 becomes easy, as in the above-described example of the embodiment of the present disclosure.

-Control information As described as the second modification, the control information includes the first measurement information indicating the result of the first measurement and the second measurement information indicating the result of the second measurement. May include. Further, the control information may include other information necessary for controlling the transmission power of the second communication device 300. The control information may also include other information necessary for controlling the transmission power of the relay device 100.

Alternatively, as in the above-mentioned example of the embodiment of the present disclosure, the control information may be information regarding the transmission power (for example, the minimum transmission power) of the second communication device 300.

-Control of transmission power --- Transmission power The transmission power of the relay device 100, which is the target of the control, may be the maximum transmission power of the relay device 100 in the first wireless link.

The transmission power of the second communication device 300, which is the target of the control, may be the minimum transmission power of the second communication device 300 in the second wireless link.

Thereby, for example, the reception power of the signal from the second communication device 300 can be secured while suppressing the self-interference of the relay device 100.

--Generation and Transmission of Power Control Information The second communication device 300 (control unit 343) may generate power control information for controlling the transmission power of the relay device 100 as the control. The second communication device 300 (communication processing unit 341) may transmit the power control information to the relay device 100.

This allows, for example, the second communication device 300 to actually control the transmission power of the relay device 100.

--Example of control The second communication device 300 (control unit 343) has the quality of the signal transmitted from the relay device 100 to the first communication device 200 in the first wireless link and the second wireless link. The above control may be performed so that the quality of the signal transmitted from the second communication device 300 to the relay device 100 is equal to or higher than the desired quality. As an example, the second communication device 300 (control unit 343) may perform the above control so that both qualities are the same quality equal to or higher than the desired quality.

Thereby, for example, data can be more efficiently transmitted from the second communication device 300 to the first communication device 200 via the relay device 100.

-Reuse of Radio Resources As described with reference to FIG. 17, the second communication device 300 may be a base station, and each of the relay device 100 and the first communication device 200 is a UE. May be good. In this case, the second radio link may be an access link (that is, a downlink and an uplink), and the first radio link may be a side link. The second communication device 300 (control unit 343) may allocate the radio resource of the second radio link, or may also allocate the radio resource of the first radio link. In particular, as shown in FIG. 19, the second communication device 300 (control unit 343) allocates a radio resource (that is, a downlink resource) for transmission from the second communication device 300 to the relay device 100. Alternatively, the radio resource may be allocated for transmission from the relay device 100 to the first communication device 200. That is, the downlink resource may be reused in the side link.

-Processing Flow With reference to FIG. 20, an example of processing according to the eighth modification of the embodiment of the present disclosure will be described.

The relay device 100 (first communication processing unit 151) transmits the first target signal on the first wireless link between the first communication device 200 and the relay device 100 (S610).

The relay device 100 (second communication processing unit 153) receives the first target signal at the second wireless link between the second communication device 300 and the relay device 100, and becomes the first target signal. The first measurement based on this is performed (S620).

The second communication device 300 (communication processing unit 341) transmits a second target signal on the second wireless link (S630).

The relay device 100 (second communication processing unit 153) receives the second target signal at the second wireless link, and performs a second measurement based on the second target signal (S640).

The relay device 100 (second communication processing unit 153) transmits the result of the first measurement and the control information obtained from the result of the second measurement to the second communication device 300 (S650).

The second communication device 300 (control unit 343) controls the transmission power of the second communication device 300 in the second wireless link based on the control information, and further relays in the first wireless link. Power control information for controlling the transmission power of the device 100 is generated (S660).

The second communication device 300 (communication processing unit 341) transmits the power control information to the relay device 100 (S670).

The relay device 100 (first communication processing unit 151) controls the transmission power of the relay device 100 in the first wireless link based on the power control information.

(9) Ninth Modification Example: Stopping Relay In the ninth modification, in addition to the eighth modification, relay by the relay device 100 may be stopped.

The second communication device 300 (control unit 343) is the first when the quality of the signal directly transmitted from the second communication device 300 to the first communication device 200 is higher than the desired quality. Relaying by the relay device 100 for the communication device 200 may be stopped. In other words, if the desired quality can be obtained by direct transmission, the relay by the relay device 100 may be stopped.

The second communication device 300 (communication processing unit 341) may transmit the target signal, and the first communication device 200 (communication processing unit 241) receives the target signal and makes a measurement based on the target signal. May be done. The quality of the signal transmitted directly from the second communication device 300 to the first communication device 200 may be calculated based on the result of the measurement. The second communication device 300 may be notified of the result of the measurement and calculate the quality. Alternatively, the first communication device 200 may calculate the quality based on the result of the measurement, and the second communication device 300 may be notified of the calculated quality.

The second communication device 300 (control unit 343) may generate stop information for stopping the relay by the relay device 100 for the first communication device 200. The second communication device 300 (communication processing unit 341) may transmit the stop information to the relay device 100. The relay device 100 may stop the relay for the first communication device 200 based on the stop information.

This makes it possible, for example, to reduce the number of forced relays.

(10) Tenth Modification Example: Specific Example of Each Device In the eighth modification described above, the second communication device 300 is a base station, the first communication device 200 is a UE, and the relay device 100 is also. UE. However, of course, the embodiments of the present disclosure are not limited to this example.

In the tenth modification, the relay device 100 may be an IAB node, and the second communication device 300 may be an IAB donor. The second wireless link may be a backhaul link, and the first wireless link may be an access link. In other words, the second radio link may be a radio link of the F1 interface, and the first radio link may be a radio link of the Uu interface.

The second communication device 300 may be an IAB node instead of an IAB donor, and may be connected to an IAB donor (or an upstream IAB node). In this case, the second communication device 300 may include an additional wireless communication unit and an additional communication processing unit in addition to the wireless communication unit 310 and the communication processing unit 341 shown in FIG. Further, the second communication device 300 may include an additional antenna and an additional RF circuit in addition to the antenna 381 and the RF circuit 383 shown in FIG.

The operation of the relay device 100, the first communication device 200, and the second communication device 300 in the tenth modification is the same as the operation in the eighth modification, for example.

(11) Eleventh Modification Example: Specific Example of Each Device In the tenth modification described above, the second communication device 300 is an IAB donor (or IAB node), and the relay device 100 is an IAB node. The communication device 200 of 1 is a UE. However, of course, the embodiments of the present disclosure are not limited to this example.

In the eleventh modification, the first communication device 200 may also be an IAB node. That is, in the eleventh modification, the second communication device 300 may be an IAB donor (or IAB node), and the relay device 100 and the first communication device 200 may be an IAB node. The first radio link and the second radio link may be backhaul links. In other words, the first radio link and the second radio link may be radio links of the F1 interface.

Note that the UE or the downstream IAB node may be connected to the first communication device 200. Therefore, the first communication device 200 may include an additional wireless communication unit and an additional communication processing unit in addition to the wireless communication unit 210 and the communication processing unit 241 shown in FIG. 7. Further, the first communication device 200 may include an additional antenna and an additional RF circuit in addition to the antenna 281 and the RF circuit 283 shown in FIG.

The operation of the relay device 100, the first communication device 200, and the second communication device 300 in the eleventh modification is the same as the operation in the eighth modification, for example.

(12) 12th Modification Example: Specific Example of Each Device In the above-mentioned example of the embodiment of the present disclosure, as described with reference to FIG. 3, the first communication device 200 is a base station, and the second communication device 200 is a base station. The communication device 300 is a UE, and the relay device 100 is also a UE. However, of course, the embodiments of the present disclosure are not limited to this example.

In the twelfth modification, the first communication device 200 may also be a UE. That is, each of the relay device 100, the first communication device 200, and the second communication device 300 may be a UE. Each of the first radio link and the second radio link may be a side link. In other words, each of the first radio link and the second radio link may be a radio link of the PC5 interface.

As an example, as shown in FIG. 21, each of the relay device 100, the first communication device 200, and the second communication device 300 may be an in-vehicle device mounted on a vehicle and is used for vehicle-to-vehicle communication. You may.

The operation of the relay device 100, the first communication device 200, and the second communication device 300 in the twelfth modification is, for example, the same as the operation in the above-mentioned example or any one of the above-described embodiments of the present disclosure. Is.

(13) 13th Modification Example: Bidirectional In the above-mentioned example of the embodiment of the present disclosure, the relay device 100 transmits the first target signal in the first radio link, and the second radio link. In, the first target signal is received, and the first measurement is performed based on the first target signal. Further, the relay device 100 (second communication processing unit 153) receives the second target signal from the second communication device 300 at the second radio link, and the second target signal is based on the second target signal. To measure. Further, the relay device 100 (second communication processing unit 153) transfers the result of the first measurement and the control information obtained from the result of the second measurement to the second communication device 300 or the first communication device 200. Send. However, the embodiments of the present disclosure are not limited to these examples.

In the thirteenth modification, the operation in the opposite direction may be further performed.

-Fourth Measurement As shown in the example of FIG. 22, the relay device 100 transmits the fourth target signal 60 at the second radio link, and the fourth target signal 60 at the first radio link. May be received and a fourth measurement based on the fourth target signal 60 may be performed.

-Fifth measurement As shown in the example of FIG. 23, the relay device 100 (second communication processing unit 153) has a fifth target signal from the first communication device 200 in the first wireless link. 70 may be received and a fifth measurement may be made based on the fifth target signal 70.

-Transmission of control information Further, the relay device 100 (second communication processing unit 153) transmits the control information obtained from the result of the fourth measurement and the result of the fifth measurement to the second communication device 300. You may. Alternatively, the relay device 100 (first communication processing unit 151) may transmit the control information to the first communication device 200.

-Sixth Measurement In the fifth modification, as shown in the example of FIG. 16, the first communication device 200 (communication processing unit 241) is the third target signal from the second communication device 300. Is received, and the third measurement is performed based on the third target signal.

In the thirteenth modification, as shown in the example of FIG. 24, the second communication device 300 (communication processing unit 341) receives the sixth target signal 80 from the first communication device 200, and the second communication device 300 (communication processing unit 341) receives the sixth target signal 80. The sixth measurement may be performed based on the target signal 80 of 6.

Thereby, for example, the radio resource of the first radio link can be reused in the second radio link, and the radio resource of the second radio link can be reused in the first radio link. Both will be easier.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments. It will be appreciated by those skilled in the art that the embodiments are merely exemplary and that various modifications are possible without departing from the scope and spirit of the present disclosure.

For example, the steps in the process described herein do not necessarily have to be performed in chronological order in the order described in the drawings. For example, the steps in the process may be performed in a different order than shown in the drawings, or in parallel. In addition, some of the steps in the process may be deleted, and additional steps may be added to the process.

For example, a method may be provided that includes the operation of one or more components included in the functional configuration of each device described herein, and a program for causing a computer to perform the operation of the components is provided. You may. Further, a non-transitional substantive recording medium that can be read by the computer on which the program is recorded may be provided. Of course, such methods, programs, and computer-readable non-transitional substantive recording media are also included in the present disclosure.

The technical features included in the above-described embodiment may be expressed as the following features. Of course, the present disclosure is not limited to such technical features.

(Feature 1)
It is a relay device (100),
A first communication processing unit (151) that transmits a signal to the first communication device in the first wireless link between the first communication device (200) and the relay device.
A second communication processing unit (153) that receives a signal from the second communication device in the second wireless link between the second communication device (300) and the relay device.
Equipped with
The first communication processing unit transmits the first target signal (30) at the first wireless link, and the first communication processing unit transmits the first target signal (30).
The second communication processing unit receives the first target signal at the second wireless link, performs the first measurement based on the first target signal, and performs the first measurement.
The second communication processing unit receives the second target signal (40) from the second communication device at the second wireless link, performs a second measurement based on the second target signal, and performs a second measurement.
The result of the first measurement and the control information obtained from the result of the second measurement are transmitted to the first communication device by the first communication processing unit, or are transmitted by the second communication processing unit to the first communication device. Sent to 2 communication devices,
Relay device.

(Feature 2)
The first communication processing unit uses the first protocol stack (11) and the first antenna (181) of the radio access network to perform transmission on the first radio link.
The second communication processing unit uses the second protocol stack (13) and the second antenna (185) of the radio access network to perform reception on the second radio link.
The relay device according to feature 1.

(Feature 3)
The relay device according to feature 1 or 2, wherein the control information is information regarding the transmission power of the second communication device.

(Feature 4)
The transmission power is the transmission power of the second communication device for improving the quality of the signal transmitted from the second communication device to the relay device in the second radio link to a desired quality or higher. , The relay device according to feature 3.

(Feature 5)
The relay device according to feature 3 or 4, wherein the transmission power of the second communication device is the minimum transmission power of the second communication device.

(Feature 6)
The relay device according to feature 1 or 2, wherein the control information includes a first measurement information indicating the result of the first measurement and a second measurement information indicating the result of the second measurement.

(Feature 7)
The first measurement is a measurement of attenuation of the first target signal.
The second measurement is a measurement of the attenuation of the second target signal.
The relay device according to any one of the features 1 to 6.

(Feature 8)
The first measurement is a measurement of the received power of the first target signal.
The second measurement is a measurement of the received power of the second target signal.
The relay device according to any one of the features 1 to 6.

(Feature 9)
The relay device according to any one of features 1 to 8, wherein the second target signal is a reference signal from the second communication device.

(Feature 10)
The first communication processing unit controls the transmission power of the relay device in the first wireless link according to the result of the first measurement and the result of the second measurement. The relay device according to any one item.

(Feature 11)
The first communication processing unit transmits the control information to the first communication device, and the first communication processing unit transmits the control information to the first communication device.
The first communication device is a device that controls at least one transmission power of the relay device and the second communication device.
The relay device according to any one of the features 1 to 10.

(Feature 12)
The relay device according to any one of features 1 to 11, wherein one of the first communication device and the second communication device is a base station.

(Feature 13)
The relay device is a user device and is
The other of the first communication device and the second communication device is a user device.
The relay device according to feature 12.

(Feature 14)
The base station is an IAB (Integrated Access and Backhaul) donor or IAB node.
The relay device is an IAB node.
The other of the first communication device and the second communication device is an IAB node or a user device.
The relay device according to feature 12.

(Feature 15)
The relay device according to any one of features 1 to 11, wherein each of the relay device, the first communication device, and the second communication device is a user device.

(Feature 16)
The first communication device (200)
A signal to the first communication device is transmitted on the first wireless link between the first communication device and the relay device (100), and the signal between the second communication device (300) and the relay device is transmitted. The result of the first measurement performed by the relay device and the result of the second measurement performed by the relay device from the relay device that receives the signal from the second communication device at the second radio link of the above. The communication processing unit (241) that receives the control information obtained from
A control unit (243) that controls the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link based on the control information.
Equipped with
The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
First communication device.

(Feature 17)
As the control, the control unit generates power control information for controlling the transmission power of the relay device or the transmission power of the second communication device.
The communication processing unit transmits the power control information to the relay device or the second communication device.
The first communication device according to feature 16.

(Feature 18)
The control unit transmits the quality of the signal transmitted from the relay device to the first communication device on the first wireless link and the transmission from the second communication device to the relay device on the second wireless link. The first communication device according to feature 16 or 17, wherein the control is performed so that the quality of the signal to be output is equal to or higher than a desired quality.

(Feature 19)
The control unit relays the signal for the second communication device when the quality of the signal directly transmitted from the second communication device to the first communication device is higher than the desired quality. The first communication device according to feature 18, which stops relaying by the device.

(Feature 20)
The desired quality is the quality of the signal transmitted directly from the second communication device to the first communication device.
The control unit receives the second communication when the transmission power of the second communication device on the second radio link becomes larger than the transmission power of the relay device on the first radio link. Stop relaying by the relay device for the device,
The first communication device according to feature 18.

(Feature 21)
The first according to feature 19 or 20, wherein the communication processing unit receives a third target signal (50) from the second communication device and performs a third measurement based on the third target signal. Communication device.

(Feature 22)
The transmission power of the relay device in the first wireless link is the maximum transmission power of the relay device in the first wireless link.
The transmission power of the second communication device in the second radio link is the minimum transmission power of the second communication device in the second radio link.
The first communication device according to any one of the features 16 to 21.

(Feature 23)
The second communication device (300)
A signal to the first communication device is transmitted on the first wireless link between the first communication device (200) and the relay device (100), and the signal between the second communication device and the relay device is transmitted. The result of the first measurement performed by the relay device and the result of the second measurement performed by the relay device from the relay device that receives the signal from the second communication device at the second radio link of the above. The communication processing unit (341) that receives the control information obtained from
A control unit (343) that controls the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link based on the control information.
Equipped with
The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
Second communication device.

(Feature 24)
As the control, the control unit generates power control information for controlling the transmission power of the relay device.
The communication processing unit transmits the power control information to the relay device.
The second communication device according to feature 23.

(Feature 25)
The control unit transmits the quality of the signal transmitted from the relay device to the first communication device on the first wireless link and the transmission from the second communication device to the relay device on the second wireless link. The second communication device according to feature 23 or 24, which controls the signal quality so as to be equal to or higher than a desired quality.

(Feature 26)
The control unit performs the relay for the first communication device when the quality of the signal directly transmitted from the second communication device to the first communication device becomes higher than the desired quality. The second communication device according to feature 25, which stops relaying by the device.

(Feature 27)
The transmission power of the relay device in the first wireless link is the maximum transmission power of the relay device in the first wireless link.
The transmission power of the second communication device in the second radio link is the minimum transmission power of the second communication device in the second radio link.
The second communication device according to any one of the features 23 to 26.

(Feature 28)
It is a method performed by the relay device (100), and is performed by the relay device (100).
Transmission of a signal to the first communication device at the first wireless link between the first communication device (200) and the relay device, and
Receiving a signal from the second communication device at the second wireless link between the second communication device (300) and the relay device, and
To transmit the first target signal (30) on the first wireless link,
Receiving the first target signal at the second radio link and performing the first measurement based on the first target signal.
Receiving the second target signal (40) from the second communication device at the second wireless link and performing the second measurement based on the second target signal.
To transmit the result of the first measurement and the control information obtained from the result of the second measurement to the first communication device or the second communication device.
How to include.

(Feature 29)
It is a method performed by the first communication device (200).
A signal to the first communication device is transmitted on the first wireless link between the first communication device and the relay device (100), and between the second communication device (300) and the relay device. The result of the first measurement performed by the relay device and the result of the second measurement performed by the relay device from the relay device that receives the signal from the second communication device at the second wireless link of the above. Receiving control information obtained from
Based on the control information, the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link is controlled.
Including
The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
Method.

(Feature 30)
It is a method performed by the second communication device (300).
A signal to the first communication device is transmitted on the first wireless link between the first communication device (200) and the relay device (100), and the signal between the second communication device and the relay device is transmitted. The result of the first measurement performed by the relay device and the result of the second measurement performed by the relay device from the relay device that receives the signal from the second communication device at the second wireless link of the above. Receiving control information obtained from
Based on the control information, the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link is controlled.
Including
The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
Method.

(Feature 31)
On the computer
Transmission of a signal to the first communication device on the first wireless link between the first communication device (200) and the relay device (100), and
Receiving a signal from the second communication device at the second wireless link between the second communication device (300) and the relay device, and
To transmit the first target signal (30) on the first wireless link,
Receiving the first target signal at the second radio link and performing the first measurement based on the first target signal.
Receiving the second target signal (40) from the second communication device at the second wireless link and performing the second measurement based on the second target signal.
To transmit the result of the first measurement and the control information obtained from the result of the second measurement to the first communication device or the second communication device.
A program to execute.

(Feature 32)
On the computer
A signal to the first communication device is transmitted on the first wireless link between the first communication device (200) and the relay device (100), and the second communication device (300) and the relay device The result of the first measurement performed by the relay device and the second measurement performed by the relay device from the relay device that receives the signal from the second communication device on the second radio link between. Receiving the control information obtained from the result and
Based on the control information, the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link is controlled.
It is a program to execute
The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
program.

(Feature 33)
On the computer
Transmission of a signal to the first communication device on the first wireless link between the first communication device (200) and the relay device (100), and
Receiving a signal from the second communication device at the second wireless link between the second communication device (300) and the relay device, and
To transmit the first target signal (30) on the first wireless link,
Receiving the first target signal at the second radio link and performing the first measurement based on the first target signal.
Receiving the second target signal (40) from the second communication device at the second wireless link and performing the second measurement based on the second target signal.
To transmit the result of the first measurement and the control information obtained from the result of the second measurement to the first communication device or the second communication device.
A non-transitional substantive recording medium that can be read by a computer that records a program for executing.

(Feature 34)
On the computer
A signal to the first communication device is transmitted on the first wireless link between the first communication device (200) and the relay device (100), and the second communication device (300) and the relay device The result of the first measurement performed by the relay device and the second measurement performed by the relay device from the relay device that receives the signal from the second communication device on the second radio link between. Receiving the control information obtained from the result and
Based on the control information, the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link is controlled.
It is a non-transitional substantive recording medium that can be read by a computer that records a program for executing the program.
The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
A non-transitional substantive recording medium that can be read by a computer.

Claims (15)

1. It is a relay device (100),
   A first communication processing unit (151) that transmits a signal to the first communication device in the first wireless link between the first communication device (200) and the relay device.
   A second communication processing unit (153) that receives a signal from the second communication device in the second wireless link between the second communication device (300) and the relay device.
   Equipped with
   The first communication processing unit transmits the first target signal (30) at the first wireless link, and the first communication processing unit transmits the first target signal (30).
   The second communication processing unit receives the first target signal at the second wireless link, performs the first measurement based on the first target signal, and performs the first measurement.
   The second communication processing unit receives the second target signal (40) from the second communication device at the second wireless link, performs a second measurement based on the second target signal, and performs a second measurement.
   The result of the first measurement and the control information obtained from the result of the second measurement are transmitted to the first communication device by the first communication processing unit, or are transmitted by the second communication processing unit to the first communication device. Sent to 2 communication devices,
   Relay device.
2. The relay device according to claim 1, wherein the control information is information regarding the transmission power of the second communication device.
3. The relay device according to claim 1, wherein the control information includes a first measurement information indicating the result of the first measurement and a second measurement information indicating the result of the second measurement.
4. The first measurement is a measurement of attenuation of the first target signal.
   The second measurement is a measurement of the attenuation of the second target signal.
   The relay device according to any one of claims 1 to 3.
5. The first measurement is a measurement of the received power of the first target signal.
   The second measurement is a measurement of the received power of the second target signal.
   The relay device according to any one of claims 1 to 3.
6. The first communication processing unit controls the transmission power of the relay device in the first wireless link according to the result of the first measurement and the result of the second measurement, claims 1 to 5. The relay device according to any one of the above items.
7. The relay device according to any one of claims 1 to 6, wherein one of the first communication device and the second communication device is a base station.
8. The relay device is a user device and is
   The other of the first communication device and the second communication device is a user device.
   The relay device according to claim 7.
9. The first communication device (200)
   A signal to the first communication device is transmitted on the first wireless link between the first communication device and the relay device (100), and the signal between the second communication device (300) and the relay device is transmitted. The result of the first measurement performed by the relay device and the result of the second measurement performed by the relay device from the relay device that receives the signal from the second communication device at the second radio link of the above. The communication processing unit (241) that receives the control information obtained from
   A control unit (243) that controls the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link based on the control information.
   Equipped with
   The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
   The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
   First communication device.
10. The control unit transmits the quality of the signal transmitted from the relay device to the first communication device on the first wireless link and the transmission from the second communication device to the relay device on the second wireless link. The first communication device according to claim 9, wherein the control is performed so that the quality of the signal to be performed is equal to or higher than a desired quality.
11. The control unit relays the signal for the second communication device when the quality of the signal directly transmitted from the second communication device to the first communication device is higher than the desired quality. The first communication device according to claim 10, which stops relaying by the device.
12. The desired quality is the quality of the signal transmitted directly from the second communication device to the first communication device.
    The control unit receives the second communication when the transmission power of the second communication device on the second radio link becomes larger than the transmission power of the relay device on the first radio link. Stop relaying by the relay device for the device,
    The first communication device according to claim 10.
13. The second communication device (300)
    A signal to the first communication device is transmitted on the first wireless link between the first communication device (200) and the relay device (100), and the signal between the second communication device and the relay device is transmitted. The result of the first measurement performed by the relay device and the result of the second measurement performed by the relay device from the relay device that receives the signal from the second communication device at the second radio link of the above. The communication processing unit (341) that receives the control information obtained from
    A control unit (343) that controls the transmission power of the relay device on the first wireless link or the transmission power of the second communication device on the second wireless link based on the control information.
    Equipped with
    The first measurement is a measurement based on a first target signal (30) transmitted by the relay device at the first radio link and received by the relay device at the second radio link.
    The second measurement is a measurement based on the second target signal (40) transmitted by the second communication device and received by the relay device at the second radio link.
    Second communication device.
14. The control unit transmits the quality of the signal transmitted from the relay device to the first communication device on the first wireless link and the transmission from the second communication device to the relay device on the second wireless link. The second communication device according to claim 13, wherein the control is performed so that the quality of the signal to be performed is equal to or higher than a desired quality.
15. The control unit performs the relay for the first communication device when the quality of the signal directly transmitted from the second communication device to the first communication device is higher than the desired quality. The second communication device according to claim 14, which stops relaying by the device.

Images