A power control method and relay device

Abstract

The application relates to a power control method and a relay device. The method comprises: determining, by the relay device, a target forwarding power according to a first forwarding power, a second forwarding power and a third forwarding power, and forwarding a first signal received from a first device to a second device using the target forwarding power. The target forwarding power is the minimum power among the first forwarding power, the second forwarding power and the third forwarding power. The first forwarding power is determined based on an indication of a network device, the second forwarding power is related to an input power of the relay device and a forwarding gain of the relay device, and the third forwarding power is determined according to a maximum forwarding power limit of the relay device. Through the method, the relay device can output a forwarding power that matches its own capability or the expectation of the network device.

Description

[0001] This application claims priority to Chinese Patent Application No. 202210562403.X, filed on May 23, 2022, with the State Intellectual Property Office of the People's Republic of China, entitled "An NCR Power Control Method, Network Device, Terminal Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of relay equipment technology, and more particularly to a power control method and a relay equipment. Background Technology

[0003] Relay equipment has signal amplification and forwarding functions, typically forwarding signals received from one device to another. The forwarding power of a relay device usually cannot exceed the maximum forwarding power limit. Similar to the maximum transmit power limit of ordinary terminal equipment, the maximum forwarding power limit of a relay device may be determined based on the capabilities of the relay device's radio frequency components, relevant standards, or applicable regulations. Summary of the Invention

[0004] When the forwarding power expected by a network device from a relay device, or the forwarding power indicated by a network device to a relay device, exceeds the aforementioned maximum forwarding power limit, the relay device should use the maximum forwarding power limit as the actual forwarding power. However, unlike the transmit power of ordinary terminal devices, the transmit power of a relay device is related not only to the gain coefficient of the relay device's power amplifier but also to the input power of the signal received by the relay device. Without considering the nonlinear characteristics of the power amplifier, the output power of the relay device (expressed in dBm) can be the sum of the received input power (expressed in dBm) and the power gain (expressed in dB). Therefore, when the input power received by the relay device is very low, even if the transmit power expected by the network device to be used by the relay device does not exceed the relay device's maximum forwarding power limit, the output power of the relay device may still fail to reach the forwarding power expected or indicated by the network device, thus affecting the network device's scheduling performance for the relay device.

[0005] To address the aforementioned technical problems, this application provides a power control method and a relay device that allows the relay device to output forwarding power that simultaneously meets the maximum forwarding power limit of the matcher and the actual input power.

[0006] In a first aspect, embodiments of this application provide a power control method. This method can be executed by a communication device, which may be a communication equipment or a device capable of supporting the functions required for the communication equipment to implement the method. For example, a chip system. Exemplarily, the communication device is a relay device, or a chip disposed in a relay device, or other components for implementing the functions of the relay device. The following description assumes that the communication device is a relay device.

[0007] The power control method includes: a relay device determining a target forwarding power based on a first forwarding power, a second forwarding power, and a third forwarding power, and using the target forwarding power to forward a first signal received from a first device to a second device. When the first device is a terminal device, the second device can be a network device; when the first device is a network device, the second device can be a terminal device. The target forwarding power is the minimum power among the first, second, and third forwarding powers. The first forwarding power is determined based on the network device's indication. Alternatively, the first forwarding power can be considered as the forwarding power that the network device expects the relay device to use. The second forwarding power is related to the relay device's input power and forwarding gain. Alternatively, the second forwarding power can be considered as being determined based on the relay device's input power (or received power) and maximum forwarding gain. The third forwarding power is determined based on the relay device's maximum forwarding power limit.

[0008] In this way, the relay device considers the forwarding power expected by the network device, the relay device's maximum forwarding power limit, and the output power determined by the relay device's actual input power and maximum forwarding gain. The relay device determines the minimum power among the first, second, and third forwarding powers as the target forwarding power, i.e., the actual forwarding power used. Using this method, the relay device can output forwarding power that matches the actual input power or the network device's expectation.

[0009] In a possible implementation, the method further includes: the relay device sending indication information of forwarding power margin. Here, the forwarding power margin is the difference between a first forwarding power and a second forwarding power (or the difference between the second forwarding power and the first forwarding power), and / or, the forwarding power margin is the difference between the first forwarding power and a third forwarding power (or the difference between the third forwarding power and the first forwarding power). The relay device sending the indication information of forwarding power margin is equivalent to the relay device reporting the forwarding power margin. This can also be understood as the relay device reporting the difference in forwarding gain margin, which is the difference between the relay device's maximum forwarding gain and the forwarding gain expected (or indicated) by the network device (or the difference between the network device's expected (or indicated) forwarding gain and the relay device's maximum forwarding gain). Relay devices can report forwarding power margins to network devices to inform them of the difference between the network device's expected forwarding power and the relay device's actual output forwarding power. This helps network devices decide whether to further improve the coverage performance of terminal devices served by the relay device, or to use other means (such as time-repeated transmission or allocation of more frequency domain resources) when they need to further improve the coverage performance of terminal devices served by the relay device.

[0010] In a possible implementation, when the forwarding power margin is the difference between the first forwarding power and the second forwarding power, the method further includes: the relay device sending first indication information, the first indication information indicating a power margin type, and the power margin type indicating that the forwarding power margin is the difference between the first forwarding power and the second forwarding power. When the forwarding power margin is the difference between the first forwarding power and the third forwarding power, the method further includes: the relay device sending first indication information, the first indication information indicating a power margin type, and the power margin type indicating that the forwarding power margin is the difference between the first forwarding power and the third forwarding power. Simultaneously with reporting the forwarding power margin, the relay device also sends the first indication information to notify the network device whether the forwarding power margin is the difference between the first and second forwarding power or the difference between the first and third forwarding power, enabling the network device to determine the reason why the relay device cannot output the corresponding forwarding power, and facilitating the network device to indicate a more reasonable forwarding power to the relay device.

[0011] Optionally, when the first forwarding power is greater than or equal to the third forwarding power, the forwarding power margin transmitted by the relay device includes the difference between the first forwarding power and the third forwarding power; when the first forwarding power is greater than or equal to the second forwarding power, the forwarding power margin includes the difference between the first forwarding power and the third forwarding power.

[0012] Optionally, when the first forwarding power is greater than or equal to the third forwarding power, the forwarding power margin sent by the relay device includes or only includes the difference between the first and third forwarding power, and the first indication information indicates that the relay device reports the difference between the first and third forwarding power. When the first forwarding power is less than or equal to the third forwarding power and the first forwarding power is greater than or equal to the second forwarding power, the forwarding power margin sent by the relay device includes or only includes the difference between the first and second forwarding power, and the first indication information indicates that the relay device reports the difference between the first and second forwarding power.

[0013] In possible implementations, the relay device can determine the first forwarding power in various ways. For example, these include, but are not limited to, the following determination methods. This application does not limit the specific determination method used.

[0014] In one possible determination method, the relay device may receive second indication information and third indication information, whereby the second indication information indicates a first bandwidth and the third indication information indicates a first forwarding power spectral density. The relay device then determines the first forwarding power based on the first bandwidth and the first forwarding power spectral density. Here, the first bandwidth is the bandwidth of the first signal, and the first forwarding power spectral density is the forwarding power that the network device expects the relay device to achieve per unit frequency domain unit. A unit frequency domain unit can be a unit Hertz, a single resource block (RB), or a single subcarrier, etc. The network device can indirectly indicate the first forwarding power by indicating the first bandwidth and the first forwarding power spectral density to the relay device, and the relay device determines the first forwarding power based on the first bandwidth and the first forwarding power.

[0015] The first forwarding power can satisfy the formula: P1 = PSD1 + 10 × log 10 (B) + C[dBm]. Where P1 is the first forwarding power, PSD1 is the first forwarding power spectral density, and B is the first bandwidth. C is predefined or preconfigured, or C is indicated by the network device or determined by the relay device itself. The units of PSD and B are corresponding. For example, if PSD is the power per RB, i.e., the unit is dBm / RB, then the unit of B is also RB.

[0016] In a possible implementation, the relay device may receive a first index indicating a first bandwidth and a first forwarding power spectral density. The relay device then determines the first forwarding power based on the first index and a first mapping relationship. The first mapping relationship is an association between multiple indices and multiple sets of parameters, one of which includes a bandwidth and a forwarding power spectral density. In this scheme, multiple sets of parameters can be predefined, preconfigured, or indicated by the network device. Each set of parameters can be associated with an index, allowing the network device to indicate the first bandwidth and the first forwarding power spectral density to the terminal device through a single index, thus saving signaling overhead.

[0017] Optionally, the first index is associated with a beam, time unit, or set of time units. That is, the first bandwidth and the first power spectral density are associated with a beam, time unit, or set of time units. It should be understood that different beam directions may result in different levels of interference and coverage. Associating the first bandwidth and the first power spectral density with the beam allows for the selection of a first bandwidth and first power spectral density with lower interference and a larger coverage area, thus ensuring that the first relay power determined by the relay equipment meets the requirements of low interference and large coverage. Similarly, within the same time unit, the beam direction is consistent. Associating the first bandwidth and the first power spectral density with the time unit or set of time units allows for the selection of different indices in different time units, which also ensures that the first relay power determined by the relay equipment meets the requirements of low interference and large coverage.

[0018] In another possible determination method, the relay device can receive second indication information and fourth indication information. The second indication information indicates a first bandwidth, and the fourth indication information indicates a first target received power spectral density, which is the expected received power of the second device per unit frequency domain cell. Then, the relay device determines the first forwarding power based on the first target received power spectral density, the first bandwidth, and a first path loss. The first path loss is the path loss between the relay device and the second device; it can be determined by the relay device itself or indicated by the network device. That is, the relay device can determine the first forwarding power based on the first target received power spectral density and first bandwidth indicated by the network device, as well as the first path loss. Because the relay device considers the first path loss, it can adjust the first forwarding power according to the actual path loss situation.

[0019] In another possible determination method, the relay device can receive a fifth indication message, which indicates a first target received power, which is the received power desired by the second device. Then, the relay device determines the first forwarding power based on the first target received power and a first path loss. That is, the relay device can determine the first forwarding power based on the first target received power and the first path loss indicated by the network device. Similarly, since the relay device considers the first path loss, it can adjust the first forwarding power according to the actual path loss situation.

[0020] For example, the first forwarding power can satisfy the formula: P1 = P6 + PL + C. Where P1 is the first forwarding power, P6 is the first target received power, PL is the first path loss, and C is a predefined, pre-configured, or configured value. Alternatively, C can be indicated by the network device or determined by the relay device itself.

[0021] Optionally, the fifth indication information may include a second index. Specifically, the relay device can determine the first target received power based on the second index and the second mapping relationship. The second mapping relationship is an association between multiple indices and multiple target received powers, where the second index is one of the multiple indices, and the first target received power is one of the multiple target received powers. In this scheme, the second mapping relationship can be predefined, pre-configured, or indicated by the network device. Since each target received power is associated with an index, the first target received power can be indicated by indicating the index, thereby saving signaling overhead.

[0022] Optionally, the second index is associated with a beam, time unit, or set of time units. That is, the target received power is associated with a beam, time unit, or set of time units. It should be understood that different beam directions may result in different levels of interference and coverage. Within the same time unit, the beam direction is consistent. Therefore, based on the beam direction, matching indices can be selected in different time units so that the first relay power determined by the relay equipment can meet the requirements of low interference and large coverage.

[0023] In possible implementations, the relay device can also receive the value of the first path loss. That is, the first path loss can be indicated by the network device, eliminating the need for the relay device to determine it itself and avoiding measurement by the relay device. Alternatively, the relay device can receive a first reference signal and determine the first path loss based on the transmission power and reception power of the first reference signal. In other words, the second device can send the first reference signal to the relay device beforehand, and the relay device measures the first reference signal to determine its reception power, thereby determining the first path loss.

[0024] Optionally, the relay device receives indication information of the first reference signal. For example, the relay device receives the identification information, time-frequency code resources, and transmission power of the first reference signal. For instance, when the first device is a network device and the second device is a terminal device, the first reference signal can be a first sounding reference signal (SRS). The relay device receives configuration information of the first SRS from the network device. This configuration information includes the identifier of the first SRS, its time-frequency location, the sequence used, transmission power, and other information.

[0025] In a possible implementation, the relay device determines the first path loss based on the transmit power and receive power of the first reference signal, including: the relay device determines the first path loss based on the transmit power and receive power of the first reference signal and a first gain. The transmit power of the first reference signal can be indicated by the network device, and the first gain is the difference between the gain of the first antenna and the gain of the second antenna. The first antenna is used by the relay device to receive and measure the first reference signal from the first device, and the second antenna is used to receive and forward the first signal to the second device. This scheme takes into account that the antenna used by the mobile terminal (MT) module in the relay device is different from the antenna used by the radio unit (RU) module used for signal forwarding processing. The MT module is used for receiving and measuring the first reference signal, and the RU module is used for forwarding signals (including the first signal). Therefore, the gain of the antenna corresponding to the MT module (i.e., the first antenna) and the gain of the antenna corresponding to the RU module (i.e., the second antenna) may be different. Therefore, the relay device can determine a more accurate first path loss by combining the first gain.

[0026] Optionally, the relay device determines the first path loss based on the transmit power and receive power of the first reference signal, including: the relay device determines the first path loss based on the transmit power, receive power, and a first coefficient. The first coefficient is a coefficient representing the signal energy input to the MT module compared to the total energy of the received signal. Specifically, when the MT module and RU module in the relay device use the same antenna, the relay device may receive and measure the first reference signal while simultaneously receiving and forwarding signals, thus requiring a portion of the received signal to be coupled to the MT module. The MT module is used for receiving and measuring the first reference signal, and the RU module is used for forwarding signals (including the first signal). Therefore, the first path loss determined by the relay device based on the first coefficient is more accurate.

[0027] Optionally, the relay device receives indication information regarding the value of the first forwarding power, including: the relay device receives a third index and determines the value of the first forwarding power based on the third index and a third mapping relationship. The third mapping relationship is an association between multiple indices and multiple forwarding power values; the third index is one of the multiple indices; and the value of the first forwarding power is the first value among the multiple forwarding power values.

[0028] Optionally, the third index is associated with a beam, time unit, or set of time units. That is, the first relay power is associated with a beam, time unit, or set of time units, so that a matching index can be selected based on the beam direction, i.e., a matching first relay power can be selected, so that the relay equipment can use the first relay power to meet the requirements of low interference and large coverage.

[0029] In a possible implementation, the method further includes: the relay device receiving indication information of a first deviation, the first deviation being used to adjust the original first forwarding power. The adjusted first forwarding power is the sum of the original first forwarding power and the first deviation. That is, the network device can also indicate the first deviation to the relay device to adjust the first forwarding power already determined by the relay device.

[0030] In another possible determination method, the relay device can receive an indication of a first forwarding gain and determine the first forwarding power based on the first forwarding gain and the first received power. Here, the first forwarding gain is the gain of the relay device's forwarding power for the first signal relative to the received power of the first signal. The first received power is used to determine the received power of the relay device for receiving the first signal. Considering that the relay device may control the forwarding power through the forwarding gain during the forwarding process, indicating the forwarding gain to the relay device helps it determine its operating mode in advance.

[0031] In a possible implementation, the relay device receives indication information of the first forwarding gain, including: the relay device receives a fourth index and determines the first forwarding gain based on the fourth index and a fourth mapping relationship. Here, the fourth mapping relationship is an association between multiple indices and multiple forwarding gains, the fourth index is one of the multiple indices, and the first forwarding gain is one of the multiple forwarding gains. Indicating the first forwarding gain through an index can save signaling overhead.

[0032] In a possible implementation, the method further includes: the relay device measuring the signal transmitted in a first time sub-unit and determining a first received power based on the obtained measurement result. Here, the first time sub-unit belongs to a first time unit, the start position of the first time sub-unit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located. Alternatively, the first time sub-unit precedes the first time unit, and the end position of the first time sub-unit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located. In this scheme, the relay device does not need to determine the first received power by measuring a reference signal received from a network device or terminal device, but instead measures the first signal in a sub-time unit before the time unit for forwarding the first signal, or in a sub-time unit within the time unit for forwarding the first signal, thereby determining the first received power.

[0033] In a possible implementation, the method further includes: the relay device receiving a second reference signal and second indication information, the second indication information indicating a first bandwidth, the first bandwidth being the bandwidth of the first signal; then, the relay device determining a first received power based on the reference signal receiving power (RSRP) of the second reference signal and the first bandwidth, and determining a first forwarding power based on a first forwarding gain and the first received power. The first received power is used to determine the received power for receiving the first signal, and the relay device receives the first signal after determining the first received power. The first forwarding gain is the gain between the relay device's forwarding power for the first signal and the received power of the first signal. In this scheme, before forwarding the first signal, the relay device can measure the reference signal received from the network device or terminal device to determine the first received power. After determining the first received power, the relay device receives the first signal; the relay device determines the first forwarding power based on the first received power and the first forwarding gain.

[0034] In a possible implementation, the method further includes: the relay device receiving second indication information and sixth indication information, the second indication information indicating a first bandwidth, which is the bandwidth of the first signal. The sixth indication information indicating a first received power spectral density, which is the received power of the relay device per unit frequency domain cell that the network device expects (can also be understood as estimated, anticipated, or predicted). Then, the relay device determines a first received power based on the first bandwidth and the first received power spectral density, and the first received power is used to determine the received power for receiving the first signal. After determining the first received power, the relay device receives the first signal. The relay device determines a first forwarding power based on the first received power and a first forwarding gain. The first forwarding gain is the gain between the forwarding power of the relay device for the first signal and the received power of the first signal. In this scheme, the relay device can determine the first received power based on the first received power spectral density expected by the network device and the bandwidth of the first signal.

[0035] In a possible implementation, the method further includes: the relay device receiving indication information of a second offset, the second offset being used to adjust the first forwarding gain. The adjusted first forwarding gain is the sum of the original first forwarding gain and the second offset. The network device can indirectly indicate the current forwarding gain of the relay device, i.e., the adjusted first forwarding gain, by indicating the second offset to the relay device.

[0036] In a possible implementation, the method further includes: the relay device determining a second forwarding power based on a second received power. The second received power is either the received power of the first signal of the relay device or the received power used by the relay device to determine the first signal. The second received power can be the input power of the relay device. Determining the second forwarding power based on the second received power means that when determining the target forwarding power, the relay device also considers the maximum transmission power it can support, so that the relay device can output a transmission power that matches its actual capabilities.

[0037] In a possible implementation, the second forwarding power is the sum of the second receiving power and the third gain, where the third gain is the maximum forwarding gain of the relay device.

[0038] In one possible implementation, the second forwarding power is the maximum forwarding power corresponding to the second receiving power. The relay device stores the relationship between the second forwarding power and the second receiving power. Since the relay device stores this relationship, the second forwarding power can be defined as the maximum forwarding power corresponding to the second receiving power, making implementation relatively simple.

[0039] In a possible implementation, the method further includes: the relay device receiving a second reference signal and second indication information, the second indication information indicating a first bandwidth, the first bandwidth being the bandwidth of the first signal. Then, the relay device determines a second received power based on the RSRP of the second reference signal and the first bandwidth. In this scheme, the relay device can measure the second reference signal received from the network device or terminal device before forwarding the first signal to determine the second received power.

[0040] In a possible implementation, the method further includes: the relay device measuring the signal transmitted in a first time sub-unit and determining a second received power based on the obtained measurement result. Here, the first time sub-unit belongs to a first time unit, the start position of the first time sub-unit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located. Alternatively, the first time sub-unit precedes the first time unit, and the end position of the first time sub-unit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located. In this scheme, the relay device does not need to determine the first received power by measuring a reference signal received from a network device or terminal device, but rather measures the first signal before forwarding the first signal, or in a sub-time unit within the time unit where the first signal is forwarded, thereby determining the second received power.

[0041] In a possible implementation, the method further includes: the relay device receiving second indication information and seventh indication information, the second indication information indicating a first bandwidth, which is the bandwidth of the first signal. The seventh indication information indicating a second received power spectral density, which is the received power that the network device expects the relay device to receive per unit frequency domain unit. Then, the relay device determines a second received power based on the first bandwidth and the second received power spectral density, the second received power being used to determine the received power for receiving the first signal. After determining the second received power, the relay device receives the first signal. The relay device determines a second forwarding power based on the second received power and a first forwarding gain. The first forwarding gain is the gain between the relay device's forwarding power for the first signal and the received power of the first signal. In this scheme, the relay device can determine the second forwarding power based on the second received power spectral density expected by the network device, as well as the bandwidth of the first signal and the first forwarding gain.

[0042] In a possible implementation, the method further includes: the relay device determining a third forwarding power based on the total transmission power. The total transmission power is the maximum transmission power determined by the relay device's capabilities, and / or, the total transmission power is indicated or pre-configured by the network device. This scheme takes into account the maximum forwarding power limit of the relay device, thereby enabling the relay device to output a matching transmission power.

[0043] In possible implementations, the relay device determines the third forwarding power based on the total transmitted power, including:

[0044] The relay device determines the third forwarding power based on the transmission power of the first module and the total transmission power. The first module is used to transmit the relay device's signals to the second device. For example, the first module is an MT module, used for information feedback to network devices. In this case, the third forwarding power is the power remaining after subtracting the transmission power of the MT module from the total transmission power limit. Besides considering the maximum forwarding power limit of the relay device, it is also more reasonable to determine the third forwarding power based on the transmission power of the relay device's own uplink information.

[0045] Secondly, embodiments of this application provide a method for reporting forwarding power margin. This method can be executed by a communication device, which may be a communication equipment or a device capable of supporting the functions required for the communication equipment to implement the method, such as a chip system. Exemplarily, the communication device is a relay device, or a chip disposed in a relay device, or other components used to implement the functions of the relay device. The following description uses a relay device as an example.

[0046] The method includes: a relay device generating indication information of forwarding power margin and sending the indication information to a network device. The forwarding power margin is the difference between a first forwarding power and a second forwarding power (or the difference between the second forwarding power and the first forwarding power), and / or, the forwarding power margin is the difference between the first forwarding power and a third forwarding power (or the difference between the third forwarding power and the first forwarding power). The first forwarding power is the forwarding power that the network device expects the relay device to use. The second forwarding power is related to the input power and forwarding gain of the relay device. Alternatively, the second forwarding power can be considered to be determined based on the input power (or received power) and the maximum forwarding gain of the relay device. The third forwarding power is determined based on the maximum forwarding power limit of the relay device. The relay device can report the forwarding power margin to the network device to notify the network device. The forwarding power expected by the network device is the difference between the forwarding power that the relay device can actually output. When the network device needs to further improve the coverage performance of the terminal devices served by the relay device, this helps the network device decide whether to further increase the forwarding power or forwarding gain, or to use other means (such as time-repeated transmission or allocation of more frequency domain resources).

[0047] In a possible implementation, when the forwarding power margin is the difference between the first forwarding power and the second forwarding power, the method further includes: the relay device sending first indication information, the first indication information indicating a power margin type, and the power margin type indicating that the forwarding power margin is the difference between the first forwarding power and the second forwarding power. When the forwarding power margin is the difference between the first forwarding power and the third forwarding power, the method further includes: the relay device sending first indication information, the first indication information indicating a power margin type, and the power margin type indicating that the forwarding power margin is the difference between the first forwarding power and the third forwarding power. If the relay device reports a forwarding power margin, then the relay device also sends first indication information to notify the network device whether the forwarding power margin is the difference between the first forwarding power and the second forwarding power, or the difference between the first forwarding power and the third forwarding power, thereby enabling the network device to determine the reason why the relay device cannot output the corresponding forwarding power, and facilitating the network device to indicate a more reasonable forwarding power to the relay device.

[0048] Optionally, when the first forwarding power is greater than or equal to the third forwarding power, the forwarding power margin transmitted by the relay device includes the difference between the first forwarding power and the third forwarding power; when the first forwarding power is greater than or equal to the second forwarding power, the forwarding power margin includes the difference between the first forwarding power and the third forwarding power.

[0049] Optionally, when the first forwarding power is greater than or equal to the third forwarding power, the forwarding power margin sent by the relay device includes or only includes the difference between the first and third forwarding power, and the first indication information indicates that the relay device reports the difference between the first and third forwarding power. When the first forwarding power is less than or equal to the third forwarding power and the first forwarding power is greater than or equal to the second forwarding power, the forwarding power margin sent by the relay device includes or only includes the difference between the first and second forwarding power, and the first indication information indicates that the relay device reports the difference between the first and second forwarding power.

[0050] Thirdly, embodiments of this application provide a communication method. This method can be executed by a communication device, which can be a communication apparatus or a device capable of supporting the functions required for the communication apparatus to implement the method. For example, a chip system. Exemplarily, the communication device is a relay device, or a chip disposed in a relay device, or other components used to implement the functions of the relay device. The following description uses the example of the communication device being a relay device.

[0051] The method includes: a relay device determining a target forwarding gain based on a first forwarding gain, a second forwarding gain, and a third forwarding gain, and using the target forwarding gain to forward a first signal received from a first device to a second device. Wherein, the first forwarding gain is the forwarding gain indicated by the network device to the relay device, the second forwarding gain is the maximum forwarding gain of the relay device, and the third forwarding gain is the forwarding gain determined based on the third forwarding power of the relay device and the received power of the first signal.

[0052] In a possible implementation, the method further includes: the relay device determining a third forwarding power based on the total transmission power, which is the maximum transmission power determined by the relay device's capabilities, and / or, the total transmission power being indicated or pre-configured by the network device.

[0053] In possible implementations, the relay device determines the third forwarding power based on the total transmitted power, including:

[0054] The relay device determines the third forwarding power based on the transmission power of the first module and the total transmission power; the first module is used to transmit the relay device's signals to the second device. For example, the first module is an MT module, used for information feedback to the base station, etc. In this case, the third forwarding power is the power remaining after subtracting the transmission power of the MT module from the total transmission power limit.

[0055] In a possible implementation, the method further includes: the relay device sending an indication of forwarding gain margin; the forwarding gain margin is the difference between a first forwarding gain and a second forwarding gain (or the difference between the second forwarding gain and the first forwarding gain), and / or, the forwarding gain margin is the difference between the first forwarding gain and a third forwarding gain (or the difference between the third forwarding gain and the first forwarding gain). The relay device can report the forwarding gain margin to the network device to notify the network device of the difference between the forwarding gain expected by the network device and the forwarding gain that the relay device can actually output. When the network device needs to further improve the coverage performance of the terminal devices served by the relay device, it helps the network device decide whether to further increase the forwarding power or forwarding gain, or to use other means (such as time-repeated transmission or allocation of more frequency domain resources).

[0056] In a possible implementation, when the forwarding gain margin is the difference between the first forwarding gain and the second forwarding gain, the method further includes: the relay device sending forwarding gain margin indication information, the indication information indicating the gain margin type, and the gain margin type indicating that the forwarding gain margin is the difference between the first forwarding gain and the second forwarding gain. When the forwarding gain margin is the difference between the first forwarding gain and the third forwarding gain, the method further includes: the relay device sending forwarding gain margin indication information, the indication information indicating the gain margin type, and the gain margin type indicating that the forwarding gain margin is the difference between the first forwarding gain and the third forwarding gain. Simultaneously with reporting the forwarding gain margin, the relay device also sends a first indication information to notify the network device whether the forwarding gain margin is the difference between the first and second forwarding gains or the difference between the first and third forwarding gains, enabling the network device to determine the reason why the relay device cannot output the corresponding forwarding gain, and facilitating the network device to indicate a more reasonable forwarding gain to the relay device.

[0057] Fourthly, embodiments of this application provide a communication device. The communication device has the function of implementing the behavior described in any of the method embodiments of the first to third aspects above. The beneficial effects can be found in the descriptions of the first to third aspects, and will not be repeated here.

[0058] The communication device can be a relay device in any of the first to third aspects, or it can be a device capable of implementing the methods provided by the first (or second or third) aspect. For example, a chip or chip system. In one possible design, the communication device includes corresponding means or modules for performing the methods of the first (or second or third) aspect. For example, the communication device includes a processing unit (sometimes also called a processing module or processor) and / or a transceiver unit (sometimes also called a transceiver module or transceiver). The transceiver unit may include a sending unit and a receiving unit, and can also be understood as the same functional module. Alternatively, the transceiver unit can also be understood as a collective term for the sending unit and the receiving unit, which can be different functional modules. These units (modules) can perform the corresponding functions in the above-described examples of the methods of the first (or second or third) aspect, as detailed in the method examples, and will not be repeated here.

[0059] Fifthly, embodiments of this application provide a communication device. This communication device can be the communication device described in the fourth aspect above, or a chip or chip system disposed within the communication device described in the fourth aspect. The communication device can be a relay device, a network device, or a terminal device. The communication device includes a communication interface and a processor, and optionally, a memory. The memory stores a computer program, and the processor is coupled to the memory and the communication interface. When the processor reads the computer program or instructions, it causes the communication device to execute the method performed by the relay device described above.

[0060] Sixthly, embodiments of this application provide a communication device. The communication device includes an input / output interface and logic circuitry. The input / output interface is used for inputting and / or outputting information. The logic circuitry is used to execute the methods described in one or more of the first to third aspects.

[0061] In a seventh aspect, embodiments of this application provide a chip system. The chip system includes a processor and may further include memory and / or a communication interface for implementing the methods of one or more of the first to third aspects. In one possible implementation, the chip system also includes memory for storing computer programs. The chip system may be composed of chips or may include chips and other discrete devices.

[0062] Eighthly, embodiments of this application provide a communication system. The communication system includes a relay device, a first device, and a second device. The relay device is used to perform the methods described in the first, second, or third aspects above. Of course, the communication system may include more relay devices, more first devices, and more second devices.

[0063] Ninthly, this application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program that, when executed, implements the methods of one or more of the first to third aspects described above.

[0064] In a tenth aspect, a computer program product is provided. The computer program product includes: computer program code, which, when executed, causes the methods of one or more of the first to third aspects described above to be performed.

[0065] The beneficial effects of the fourth to tenth aspects and their implementation methods mentioned above can be referred to the description of the beneficial effects of the first to third aspects and their implementation methods. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the architecture of a communication system applicable to the embodiments of this application;

[0067] Figure 2A A schematic diagram of the structure of a relay device provided in an embodiment of this application;

[0068] Figure 2B A schematic diagram of the structure of a relay device provided in an embodiment of this application;

[0069] Figure 3 A schematic flowchart of the power control method provided in the embodiments of this application;

[0070] Figure 4 A schematic diagram showing the MT module and RU module using different antennas provided in the embodiments of this application;

[0071] Figure 5 A schematic diagram showing that the MT module and RU module provided in the embodiments of this application use the same antenna;

[0072] Figure 6 Input and output power curves of the relay device provided in the embodiments of this application at various amplification levels;

[0073] Figure 7 This is another structural schematic diagram of the relay device provided in the embodiments of this application. Detailed Implementation

[0074] The technical solutions provided in the embodiments of this application can be applied to New Radio (NR) systems, Long Term Evolution (LTE) systems, or next-generation mobile communication systems, such as the sixth generation (6G) communication system or other similar communication systems. Of course, the technical solutions provided in this application can also be applied to other possible communication systems, such as Vehicle-to-Everything (V2X) systems, Internet of Things (IoT) systems, and Narrowband Internet of Things (NB-IoT) systems.

[0075] For example, Figure 1 This is a schematic diagram of a network architecture for a communication system applicable to embodiments of this application. The communication system may include network devices, terminal devices, and relay devices. The relay devices have signal amplification and forwarding functions, capable of forwarding signals received from terminal devices to network devices, and vice versa. Figure 1 The number of network devices, terminal devices, and relay devices mentioned is just an example; it could be fewer or more.

[0076] In this embodiment, the terminal device is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from network devices. The terminal device may include user equipment (UE), sometimes also referred to as a terminal, access station, UE station, remote station, wireless communication device, or user device, etc. Terminal devices are used to connect people, things, and machines, and can be widely used in various scenarios, including but not limited to the following: cellular communication, device-to-device (D2D), V2X, machine-to-machine / machine-type communications (M2M / MTC), IoT, virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, drones, robots, and other scenarios. The various terminal devices described above, if located in a vehicle (e.g., placed inside or installed inside a vehicle), can all be considered in-vehicle terminal devices, also known as on-board units (OBUs). The terminal device of this application can also be an in-vehicle module, in-vehicle component, in-vehicle chip, or in-vehicle unit built into a vehicle as one or more components or units. The vehicle can implement the methods of this application through the built-in in-vehicle module, in-vehicle component, in-vehicle chip, or in-vehicle unit.

[0077] In this application embodiment, the network device can be an access device for a terminal device to wirelessly access a mobile communication system, such as an access network (AN) device. The network device can also refer to a device that communicates with the terminal device over the air interface. The network device can include an evolved Node B (eNB / e-NodeB) in an LTE system or Long Term Evolution-Advanced (LTE-A); the network device can also include a next-generation node B (gNB) in an NR system; or, the network device can include an access node in a wireless-fidelity (Wi-Fi) system; or the network device can be a station, relay station, vehicle-mounted equipment, and future Public Land Mobile Network (PLMN) equipment, D2D network equipment, M2M network equipment, Internet of Things (IoT) network equipment, or PLMN network equipment. The embodiments of this application do not limit the specific technology or device form used in the network device.

[0078] In this application embodiment, the communication device used to implement the functions of a network device or a terminal device can be a network device or a terminal device, or it can be a device capable of supporting the network device or terminal device to implement the functions. For example, a chip system. This device can be installed in the network device or the terminal device. In the technical solutions provided in the embodiments of this application, the technical solutions provided in the embodiments of this application are described using the example of a network device for implementing the functions of a network device and a terminal device for implementing the functions of a terminal device.

[0079] In this application, a relay device refers to a device or apparatus with signal amplification and signal forwarding functions, capable of forwarding signals received from one device to another. For example, a relay device can amplify and forward signals received from a network device to a terminal device, or amplify and forward signals received from a terminal device to a network device. The relay device may have the ability to receive and parse control information from the network device, and the network device may send control information to the relay device. For example, this information may be used to configure one or more of the following: the relay device's switching state, beam direction, power level, forwarding gain, uplink / downlink time slot configuration, and operating bandwidth. The relay device receives the control information and performs corresponding configuration based on it. When the relay device does not have a module for receiving control information from the network device, the relay device may be a radio frequency (RF) repeater. When the relay device has a module for receiving control information from the network device, the relay device may be a network controlled repeater (NCR) or a smart repeater (SR).

[0080] For example, such as Figure 2A As shown, the relay device receives downlink signals from the network device via a donor antenna, then performs filtering and amplification before forwarding the amplified signal to the terminal device via a service antenna. The donor antenna can also be called a forward antenna, and the service antenna can be called a backward antenna, retransmission antenna, or coverage antenna. This mode can be called downlink forwarding mode. In downlink forwarding mode, the channel between the donor antenna and the service antenna can also be called a downlink forwarding channel. Conversely, the relay device can receive uplink signals from the terminal device via the service antenna, then perform filtering and amplification before forwarding the amplified signal to the network device via the donor antenna. This mode can be called uplink forwarding mode. In uplink forwarding mode, the channel between the service antenna and the donor antenna can also be called an uplink forwarding channel. Optionally, the uplink and downlink forwarding channels may also include mixers. Figure 2A As shown, taking the uplink forwarding channel as an example, the relay device first downconverts the high-frequency signal to an intermediate frequency (or baseband) using a mixer, then filters it at the intermediate frequency (or baseband), and finally upconverts it back to a high frequency using another mixer before forwarding the signal. Optionally, the uplink and downlink forwarding channels also include power amplifiers, such as low-noise amplifiers (LNAs).

[0081] It should be noted that the uplink forwarding channel, which can also be described as an uplink forwarding module, will be used as an example in this embodiment. Similarly, the downlink forwarding channel, which can also be described as a downlink forwarding module, will be used as an example in this embodiment.

[0082] For example, Figure 2B Another structure of a relay device is shown. This relay device includes a control signal receiving and processing module, a repeater module, and an antenna. The control signal receiving and processing module is connected to the repeater module. The repeater module includes RF devices (such as...) connected in sequence. Figure 2A The relay device (which performs filtering operations) and power amplifier (PA) are used in the relay. When the relay device is in downlink forwarding mode, the antenna on the network device side is connected to the downlink forwarding channel, and the antenna on the terminal device side is also connected to the downlink forwarding channel, allowing the relay device to forward downlink information from the network device to the terminal device. When the relay device is in uplink forwarding mode, the antenna on the network device side is connected to the uplink forwarding channel, and the antenna on the terminal device side is also connected to the uplink forwarding channel, allowing the relay device to forward uplink information from the terminal device to the network device. The control signal receiving and processing module can receive control signals sent by the network device and use its connection with the forwarding module to adjust the parameters of the forwarding module. For example, the orientation of the antenna beam, the switching of the forwarding module, and the amplification gain of the forwarding module. It should be understood that the forwarding module can also be described as a radio unit (RU) module, and the control signal receiving and processing module can also be described as a mobile terminal (MT) module.

[0083] The power output of relay devices varies, which can lead to different levels of network interference and energy consumption. To mitigate network interference, network equipment can control the power of relay devices, reducing interference while still meeting coverage or data transmission rate requirements. The forwarding power of relay devices typically cannot exceed the maximum forwarding power limit. Similar to the maximum transmit power limit of ordinary terminal equipment, the maximum forwarding power limit of relay devices may be determined based on the capabilities of the relay device's radio frequency components, relevant standards, or applicable regulations.

[0084] When the forwarding power expected by a network device from a relay device, or the forwarding power indicated by the network device to the relay device, exceeds the aforementioned maximum forwarding power limit, the relay device should use the maximum forwarding power limit as the actual forwarding power. However, unlike the transmit power of ordinary terminal devices, the transmit power of a relay device is related not only to the gain coefficient of the relay device's power amplifier but also to the input or received power of the signal received by the relay device. Without considering the nonlinear characteristics of the power amplifier, the output power of the relay device (expressed in dBm) can be the sum of the received input power (expressed in dBm) and the power gain (expressed in dB). Therefore, when the input power received by the relay device is very low, even if the transmit power expected by the network device to be used by the relay device does not exceed the relay device's maximum forwarding power limit, the output power of the relay device may still fail to reach the forwarding power expected or indicated by the network device, thus affecting the network device's scheduling performance for the relay device.

[0085] Therefore, this application provides a method for determining the actual forwarding power of a relay device and a relay device in general. In this application, the relay device can determine the actual forwarding power (target forwarding power) to be used by the relay device based on the forwarding power expected by the network device (referred to as the first forwarding power), the forwarding power determined according to the input power and forwarding gain of the relay device (referred to as the second forwarding power), and the forwarding power determined according to the maximum forwarding power limit of the relay device (referred to as the third forwarding power). The second forwarding power can also be considered as the forwarding power that the relay device can achieve using its maximum forwarding gain at a given input power. Since the relay device considers not only the forwarding power expected by the network device and the maximum forwarding power limit of the relay device, but also the forwarding power that the relay device can achieve using its maximum forwarding gain at a given input power, the method provided in this application allows the relay device to output forwarding power that matches its own capabilities or the network device's expectations.

[0086] The technical solutions provided by the embodiments of this application are described below with reference to the accompanying drawings.

[0087] This application provides a power control method applicable to communication systems including relay devices. In the following description, this power control is used in… Figure 1The communication system shown is illustrated. The power control provided in this application embodiment can be applied to both uplink and downlink transmissions. It should be understood that uplink and downlink transmissions are relative terms. For example, transmission from a terminal device to a relay device and then to a network device is uplink transmission, while transmission from a network device to a relay device and then to a terminal device is downlink transmission. In this application, a relay device can be a communication device used to implement the relay device function, or it can be a device capable of supporting the relay device to implement this function, such as a chip system, which can be installed in the relay device. In the technical solutions provided in this application, the relay device is used as an example to illustrate the technical solutions provided in the embodiments of this application.

[0088] For example, Figure 3 This is a flowchart illustrating the power control method provided in an embodiment of this application. In the following description, the power control method is implemented via a relay device as an example. When the first device is a terminal device, the second device is a network device; when the first device is a network device, the second device is a terminal device. In this embodiment, the association relationship can also be understood as a correspondence relationship or a mapping relationship. The association between A and B can be understood as A and B corresponding, or A can be mapped to B.

[0089] S301, The relay device determines the minimum power among the first relay power, the second relay power, and the third relay power as the target relay power.

[0090] S302, The relay device uses the target forwarding power to forward the first signal received from the first device to the second device.

[0091] The first forwarding power is determined based on the network device's instructions. Alternatively, it can be considered the forwarding power that the network device expects the relay device to use. The second forwarding power is related to the relay device's input power and forwarding gain. Alternatively, it can be considered the forwarding power that the relay device can achieve using its maximum forwarding gain with a given input power. The third forwarding power is determined based on the relay device's maximum forwarding power limit. The relay device can use the minimum of the first, second, and third forwarding powers as the power to forward the first signal, i.e., the target forwarding power. Because the relay device considers the forwarding power expected by the network device, the relay device's maximum forwarding power limit, and the output power determined by the relay device's input power and forwarding gain, the relay device can output a forwarding power that matches its own capabilities or the network device's expectations.

[0092] After determining the target forwarding power, the relay device uses that target forwarding power to forward the first signal received from the first device to the second device. For example... Figure 3As shown, the first device is a terminal device, the second device is a network device, and the relay device receives the first signal from the terminal device and forwards the first signal to the network device using the target forwarding power.

[0093] Optionally, the network device can indicate the time unit where the first signal is located to the relay device, so that the relay device can determine the effective time range of the target forwarding power.

[0094] The following describes how the relay device determines the first forwarding power, the second forwarding power, and the third forwarding power. For ease of description, the first forwarding power is denoted as P1, the second forwarding power as P2, the third forwarding power as P3, and the target forwarding power as Pout. It can be understood that Pout = min(P1, P2, P3). The first forwarding gain is denoted as G1. Taking the relay device forwarding the first signal as an example, the bandwidth of the first signal is called the first bandwidth. In the embodiments of this application, a unit frequency domain unit can be a unit Hertz (Hz), a single resource block (RB), or a single subcarrier, etc. "B" in the following text refers to the first bandwidth. "dBm" can be used to represent power; P1, P2, and P3 can all be represented by dBm. When adjusting the deviation of P1, P2, or P3, it can be represented by dB.

[0095] The network device can indicate the first forwarding power to the relay device via the first forwarding power indication information. That is, before S301, S300 can be executed. The network device sends the first forwarding power indication information to the relay device. Correspondingly, the relay device receives the first forwarding power indication information sent by the network device. The first forwarding power indication information indicates the first forwarding power.

[0096] The first forwarding power indication information can be indicated through one or more of the following: Downlink control information (DCI), Medium access control (MAC) control element (CE), and radio resource control (RRC) signaling. The first forwarding power indication information can be carried in one signaling message or multiple signaling messages. It should be noted that the specific name of the first forwarding power indication information is not limited in this application embodiment. The first forwarding power indication information includes information used to indicate the first forwarding power. The first forwarding power indication information can directly or indirectly indicate the first forwarding power. There are various ways to indicate the first forwarding power using the first forwarding power indication information. Correspondingly, the relay device can determine the first forwarding power in various ways based on the first forwarding power indication information. This application embodiment does not limit the specific method used, allowing for greater flexibility.

[0097] In method one, the first relay power indication information can indicate the quantized value of the first relay power. The relay device receives this indication information and can determine the first relay power, which is relatively simple. The first relay power indication information indicating the quantized value of the first relay power includes the following indication methods.

[0098] In one indication method, network devices can dynamically indicate the quantized value of the first forwarding power to relay devices through physical layer signaling, such as DCI.

[0099] In indication method two, the first forwarding power indication information includes indication information for one time unit. The forwarding power in this time unit is the first forwarding power. The relay device receives the indication information for this time unit and can determine the forwarding power in that time unit as the first forwarding power. For example, taking time unit X as an example, the forwarding power in time unit X is P5. The network device can send indication information to the relay device to indicate time unit X. Upon receiving this indication information, the relay device can determine the first forwarding power P1 as P5.

[0100] Optionally, the network device can pre-configure, configure, or predefine one or more associations between forwarding power and time units for the relay device, such as configuring the association through RRC signaling. For example, the network device indicates one or more time units of a cycle to the relay device, with each time unit of a cycle associated with a forwarding power. The relay device determines the first forwarding power based on the forwarding power value of the current time unit.

[0101] In indication method three, the first forwarding power indication information includes an index associated with the first forwarding power. For example, the network device pre-configures (or configures) or predefines multiple forwarding powers to the relay device, with each forwarding power associated with an index. This represents the association between the network device's pre-configuration (or configuration) or predefinition of multiple forwarding powers and multiple indices. In this case, the network device can indicate the first forwarding power to the terminal device through the index associated with the first forwarding power, thus saving signaling overhead. For example, the network device can pre-configure the association between multiple forwarding powers and multiple indices through RRC signaling. Before the relay device forwards the first signal, the network device can dynamically indicate an index, such as a third index, through physical layer signaling, such as DCI. The forwarding power associated with this third index is P4, and the relay device determines the first forwarding power as P4 based on the third index and this association.

[0102] Optionally, multiple indices can also be associated with one or more other parameters, such as beam, time unit, or set of time units. Considering that network devices may expect relay devices to serve terminal devices in different beam directions on different time units, and that power control parameters differ across beam directions, for example, other network devices or terminal devices may be located on certain beams, requiring relay devices to use lower forwarding power on these beams. Therefore, when an index is associated with beam, time unit, and power parameters simultaneously, network devices can control the relay device's beam, occupied time unit, and power through a single index, saving control signaling overhead.

[0103] Optionally, the network device can also indicate a power deviation to the relay device for adjusting the first forwarding power. For example, based on any of the three indication methods mentioned above, the network device can also send a power deviation indication message via physical layer signaling such as DCI. The relay device adjusts the already determined first forwarding power according to this power deviation indication message, and the adjusted first forwarding power becomes the first forwarding power finally determined by the terminal device. Taking indication method two as an example, the relay device determines the first forwarding power as the forwarding power corresponding to time unit X indicated by the network device. Continuing with the example in indication method two, the network device also sends a power deviation indication message Δ2 to the relay device, which can then determine P1 = P5 + Δ2. Here, Δ2 can be a positive or negative number.

[0104] In the second determination method, the first forwarding power indication information includes second and third indication information. The second indication information indicates the first bandwidth, and the third indication information indicates the first forwarding power spectral density. The first forwarding power spectral density is the forwarding power that the network device expects the relay device to achieve per unit frequency domain cell. The relay device can determine the first forwarding power based on the first bandwidth and the first forwarding power spectral density.

[0105] For example, the first forwarding power can satisfy the formula: P1 = PSD1 + 10 × log 10 (B) + C[dBm]. Where PSD1 is the first forwarding power spectral density, B is the first bandwidth, and C is a parameter affecting power control. For example, considering that the higher the modulation order of the signal, the higher the signal-to-noise ratio required for demodulation, and the higher the requirement for forwarding power, C can be a parameter determined according to the specific modulation order of the first signal. C can be predefined or preconfigured, or C can be dynamically indicated by the network device or determined by the relay device itself. If the first forwarding power spectral density refers to the forwarding power on a single RB, then B is also based on RB, i.e., how many RBs B includes. If the first forwarding power spectral density refers to the forwarding power on a single Hz, then B is also based on Hz. It is understandable that when the definition of a unit frequency domain element in the first forwarding power spectral density differs from the definition of a unit frequency domain element in the first bandwidth, the first bandwidth needs to be converted. For example, when the subcarrier bandwidth of the first signal is configured as μ, the first forwarding power can satisfy the formula: P1 = PSD1 + 10 × log 10 (2 μ B)+C[dBm].

[0106] The second and third indication information can be carried on a single signaling message or on different signaling messages. For example, when a network device sends a first forwarding power indication message to a relay device, it can send the second and third indication messages separately, or it can send the second and third indication messages together to the relay device.

[0107] Similar to the first forwarding power indication information indicating the quantized value of the first forwarding power in determination method one, the second indication information indicating the first bandwidth also has multiple indication methods, and the third indication information indicating the first forwarding power spectral density also has multiple indication methods, such as including but not limited to the following indication methods.

[0108] In the first indication method, the network device can dynamically indicate the quantized value of the first bandwidth to the relay device through physical layer signaling, such as DCI. That is, the second indication information can be DCI, including the quantized value of the first bandwidth. Similarly, the third indication information can be DCI, including the quantized value of the first forwarding power spectral density.

[0109] In the second indication method, the second indication information includes indication information for one time unit. The first bandwidth is the bandwidth of the first signal in that time unit. The relay device receives the first forwarding power indication information and can determine the first bandwidth as the first bandwidth in that time unit based on the time unit indicated by the second indication information. For example, taking time unit Y as an example, the signal bandwidth in time unit Y is B1. The second indication information includes the indication information for time unit Y, and the relay device determines the first bandwidth as B1. Similarly, the third indication information also includes the indication information for the first time unit, and the relay device determines the first forwarding power spectral density as the forwarding power spectral density in that time unit.

[0110] Optionally, the network device can pre-configure, configure, or predefine the association between one or more bandwidths (and / or forwarding power spectral density) and time units to the relay device. For example, the network device indicates one or more time units of a cycle to the relay device, each time unit of a cycle is associated with a bandwidth (and / or forwarding power spectral density), and the relay device determines a first bandwidth based on the bandwidth associated with the current time unit and a first forwarding power spectral density based on the forwarding power spectral density associated with the current time unit.

[0111] In the third indication method, the second indication information includes an index associated with the first bandwidth. For example, the network device pre-configures (or configures) or predefines the association between multiple bandwidths and multiple indices to the relay device. The relay device can determine the first bandwidth based on the index carried in the second indication information and the association. Similarly, the third indication information includes an index associated with the first forwarding power spectral density. For example, the network device pre-configures (or configures) or predefines the association between multiple forwarding power spectral densities and multiple indices to the relay device. The relay device can determine the first forwarding power spectral density based on the index carried in the third indication information and the association.

[0112] Optionally, the second and third indication information can employ different indication methods as described above. For example, the network device indicates the quantized value of the first bandwidth via physical layer signaling (i.e., indication method one). Another example is that multiple indices and associations of multiple forwarding power spectral densities are configured via higher-layer signaling, and then an index is indicated via physical layer signaling. The relay device uses this index to determine that the forwarding power spectral density associated with it is the second forwarding power spectral density (i.e., indication method three).

[0113] Optionally, the index included in the second indication information and the index included in the third indication information can be the same index. That is, an index is associated with both a bandwidth and a forwarding power spectral density. For ease of description, bandwidth and forwarding power spectral density can be considered as a set of parameters. For example, a network device can pre-configure or pre-define the association between multiple sets of parameters and multiple indices (e.g., referred to as a first mapping relationship) to a relay device. In this case, the network device can indirectly indicate the first bandwidth and the first forwarding power spectral density to the relay device through a single index, thereby saving signaling overhead. For example, one set of parameters in a set of parameters includes the first bandwidth and the first forwarding power spectral density, and the index associated with this set of parameters is the first index. The network device can send the first index to the relay device, and the relay device can determine the first bandwidth and the first forwarding power spectral density based on the first index and the first mapping relationship, thereby determining the first forwarding power.

[0114] Optionally, the index associated with each set of parameters can also be associated with one or more other parameters, such as beam, time unit, or set of time units. In this case, the network device can control the relay device's beam, occupied time units, and power through a single index, saving control signaling overhead.

[0115] Similar to method one, for the first bandwidth, the network device can also indicate a bandwidth deviation to the relay device for adjustment. The relay device adjusts the initially determined first bandwidth based on this bandwidth deviation, and the adjusted first bandwidth becomes the final first bandwidth determined by the relay device. For example, the final first bandwidth is the sum of the initially determined first bandwidth and the bandwidth deviation. Similarly, for the first forwarding power spectral density, the network device can also indicate a forwarding power spectral density deviation to the relay device. The relay device adjusts the already determined first forwarding power spectral density based on this deviation, and the adjusted first forwarding power spectral density becomes the final first forwarding power spectral density determined by the relay device. For example, the final first forwarding power spectral density is the sum of the initially determined first forwarding power spectral density and the forwarding power spectral density deviation.

[0116] It is understandable that if C is not predefined or preconfigured, or is determined by the relay device itself, the network device can also send indication information to the relay device to indicate C. It should be noted that the indication information indicating the first bandwidth, the indication information indicating the first forwarding power spectral density, and the indication information indicating C can be carried in a single signaling message, or they can be carried in separate signaling messages. This application does not impose any limitations on this. Furthermore, the network device can directly indicate C, or it can indirectly indicate C. For example, the network device can indicate A and B to the relay device, and the relay device determines C based on A and B. For example, C = A + B.

[0117] In method three, the first forwarding power indication information may include a fifth indication information, which indicates the first target received power. The relay device determines the first forwarding power based on the first target received power and the first path loss. In downlink forwarding mode, the relay device needs to amplify and forward the signal received by the network device to the terminal device. In this case, the second device is the terminal device, and the first path loss is the path loss between the relay device and the terminal device. In uplink forwarding mode, the relay device needs to amplify and forward the signal received by the terminal device to the network device. In this case, the second device is the network device, and the first path loss is the path loss between the relay device and the network device. The first target received power is the expected received power of the second device for the first signal. Because the relay device considers the first path loss, the determined first forwarding power is more accurate.

[0118] For example, the first forwarding power P1 satisfies: P1 = P6 + α × PL + C. Where P6 is the first target received power, PL is the first path loss, and C is a parameter affecting power control. For details regarding C, please refer to the relevant content in the aforementioned determination method two; it will not be repeated here. α can be pre-configured by the network device or dynamically configured by the network device through RRC signaling. This application embodiment does not limit the specific configuration method of α; for example, the network device can configure α by index, or α can be configured to be 1 by default.

[0119] Similar to the first forwarding power indication information indicating the quantized value of the first forwarding power in determination method one, the fifth indication information indicating the first target received power may include the following indication methods.

[0120] In one indication method, network devices can use physical layer signaling. For example, DCI dynamically indicates the quantized value of the first target received power to the relay device. That is, the fifth indication information can be DCI, including the quantized value of the first target received power.

[0121] In indication method two, the fifth indication information includes indication information for one time unit. The first target received power is the target received power in that time unit. The relay equipment receives the indication information for that time unit and can determine the target received power in that time unit as the first target received power.

[0122] Optionally, the network device can pre-configure, configure, or predefine the association between one or more target received powers and time units to the relay device. For example, the network device indicates one or more time units of a cycle to the relay device, with each time unit of a cycle associated with a target received power, and the relay device determines a first target received power based on the target received power associated with the current time unit.

[0123] In indication method three, the fifth indication information includes an index associated with the first target received power. For example, the network device pre-configures (or configures) or predefines the association between multiple target received powers and multiple indices to the relay device. The relay device can determine the first target received power based on the index carried in the fifth indication information and the association.

[0124] Similarly, an index associated with the received power of multiple targets can also be associated with one or more other parameters. For example, beam, time unit, or set of time units.

[0125] Optionally, the network device may also indicate the received power deviation to the relay device for adjusting the first target received power. The relay device adjusts the initially determined first target received power based on the received power deviation, and the adjusted first target received power becomes the final first target received power determined by the relay device. For example, the final first target received power is the sum of the initially determined first target received power and the received power deviation.

[0126] In one possible implementation, the first path loss can be indicated by a network device. For example, the network device can send path loss indication information to a relay device, which can indicate the first path loss. The path loss indication information and the fifth indication information can be carried in one signaling message or in different signaling messages. This application embodiment does not limit this. Similar to the second indication information indicating the first bandwidth, the path loss indication information indicating the first path loss can also be indicated in the following three ways.

[0127] In indication method one, the road loss indication information may include the value of the first road loss. The relay equipment receives the road loss indication information and can determine the first road loss.

[0128] In the second indication method, the path loss indication information may include indication information for a time unit, with the first path loss being the path loss within that time unit. The relay equipment, upon receiving the indication information for that time unit, can determine that the first path loss is the path loss within that time unit.

[0129] Optionally, the network device can pre-configure, configure, or predefine one or more path loss-time unit associations to the relay device. For example, the network device indicates one or more time units of a cycle to the relay device, with each time unit of a cycle associated with a path loss, and the relay device determines the first path loss based on the path loss associated with the current time unit.

[0130] In the third indication method, the path loss indication information includes an index associated with the first path loss. For example, the network device pre-configures (or configures) or predefines the association between multiple path losses and multiple indexes to the relay device. The relay device can determine the first path loss based on the index carried in the path loss indication information and the association.

[0131] Optionally, the network device can also indicate the path loss deviation to the relay device for adjusting the first path loss. The relay device adjusts the initially determined first path loss based on the path loss deviation, and the adjusted first path loss becomes the final first path loss determined by the relay device. For example, the final first path loss is the sum of the initially determined first path loss and the path loss deviation.

[0132] Optionally, the index included in the path loss indication information and the index included in the fifth indication information (when using method three) can be the same index. That is, an index can be associated with both a path loss value and a target received power. In this case, the network device can indicate both path loss information and target received power information simultaneously through a single index.

[0133] Optionally, the fifth indication information and the path loss indication information can adopt the different indication methods mentioned above. For example, the network device indicates the target received power using method one and indicates the path loss using method three.

[0134] In another possible implementation, the second device may send a reference signal (e.g., referred to as the first reference signal) to the relay device for determining the first path loss. The relay device measures the first reference signal to determine the first path loss. For example, the relay device may determine the first path loss based on the transmit power and receive power of the first reference signal. The first reference signal may be a non-zero power channel state information reference signal (NZP-CSI-RS), a synchronization signal / physical broadcast channel block (SSB), or an SRS. It is understood that during uplink forwarding, the first reference signal may be NZP-CSI-RS or SSB, and during downlink forwarding, the first reference signal may be SRS.

[0135] The transmission power of the first reference signal can be indicated by the network device. For example, the network device can send configuration information of the first reference signal to the relay device. This configuration information may include the identifier of the first reference signal, its time-frequency location information, the sequence used, and the transmission power P7. The network device then sends the first reference signal to the relay device, which receives the first reference signal at its time-frequency location and measures it to determine the received power P8. It can be seen that when P7 and P8 are represented in dBm and path loss is represented in dB, the first path loss PL = P7 - P8.

[0136] The specific implementation of the network device sending a first reference signal to the relay device in this application embodiment is similar to the second indication information indicating the first bandwidth. For example, the network device can send identification information of the first reference signal to the relay device. Another example is that the network device can send indication information including a time unit to the relay device to indicate that the first reference signal is the reference signal in that time unit. Yet another example is that the network device pre-configures or predefines the relationship between multiple reference signals and multiple indices to the relay device, and the network device indicates the first reference signal by sending the index of the first reference signal to the relay device.

[0137] Typically, repeater equipment uses the MT module to receive and measure the reference signal, and the RU module to receive, amplify, and forward the signal to be relayed. Therefore, the receiving and measurement of the first reference signal by the repeater equipment can be understood as being done through the MT module.

[0138] When the antenna used by the MT module in the relay equipment is different from the antenna used by the RU module used for signal forwarding processing, the gain of the antenna corresponding to the MT module and the gain of the antenna corresponding to the RU module may be different. Therefore, the relay equipment determines the first path loss based on the transmit power and receive power of the first reference signal and the first gain. The first gain is the difference between the gain of the first antenna and the gain of the second antenna. The first antenna is the antenna corresponding to the MT module, and the second antenna is the antenna corresponding to the RU module. The gain of the first antenna minus the gain of the second antenna is A[dB]. Since the first path loss is essentially the path loss between the antenna corresponding to the RU module of the relay equipment and the second device, the first path loss PL can satisfy: PL = P7 - P8 - A[dB]. It should be noted that in this embodiment, the antenna gain includes the array gain of the antenna, the directional gain of each antenna element, and other gains. For example, Figure 4 A schematic diagram showing the use of different antennas for the MT module and the RU module. Figure 4 Taking an MT module using only one dual-polarized antenna element and an RU module using four dual-polarized antenna elements as an example, when all antenna elements are identical, the antenna gain of the MT module is 6dB less than that of the RU module, i.e., A = -6dB. In this case, the repeater adds 6dB to the original path loss calculation method. A can be determined by the repeater itself or indicated to the repeater by the network device. The repeater can also report A to the network device.

[0139] When the MT module and RU module in a relay device use the same antenna, the relay device may receive and measure a first reference signal while simultaneously receiving and forwarding signals. Therefore, a portion of the received signal needs to be coupled to the MT module. Thus, the relay device determines the first path loss based on the transmitted power and received power of the first reference signal, along with a first coefficient, where the first coefficient is the ratio of the signal energy input to the MT module to the total received signal energy. Figure 5 As shown, for example, if the coefficient of the signal energy input to the MT module relative to the total energy of the received signal is D (<0dB, for example, D = -10dB), the first path loss PL can satisfy: When the absolute value of D is large, the relay device can approximately determine PL = P7 - P8 - D [dB]. Here, D can be determined by the relay device itself, or it can be indicated to the relay device by the network device. The relay device can also report D to the network device.

[0140] In method four, the first forwarding power indication information includes second and fourth indication information. The second indication information indicates the first bandwidth, and the fourth indication information indicates the first target received power spectral density. In this case, the relay device determines the first forwarding power based on the first target received power spectral density, the first bandwidth, and the first path loss. The first target received power spectral density is the target received power spectral density expected by the second device. The first path loss is the path loss between the relay device and the second device. In downlink forwarding mode, the relay device needs to amplify and forward the signal received by the network device to the terminal device; in this case, the second device is the terminal device. In uplink forwarding mode, the relay device needs to amplify and forward the signal received by the terminal device to the network device; in this case, the second device is the network device.

[0141] For example, the first forwarding power P1 satisfies: P1 = PSD² + 10 × log 10 (B) + C + PL [dBm]. Where PSD2 is the first target received power spectral density, B is the first bandwidth, PL is the first path loss, and C is a parameter affecting power control. For details regarding C, please refer to the relevant content in the aforementioned determination method two; it will not be repeated here. If the first target received power spectral density refers to the forwarding power on a single RB, then correspondingly, B also uses RB as the basic unit, i.e., how many RBs B includes. If the first target received power spectral density refers to the forwarding power on a single Hz, then correspondingly, B also uses Hz as the basic unit. It is understandable that when the definition of a unit frequency domain element in the first target received power spectral density differs from the definition of a unit frequency domain element in the first bandwidth, the first bandwidth needs to be forwarded. For example, when the subcarrier bandwidth of the first signal is configured as μ, the first forwarding power can satisfy the formula: P1 = PSD2 + 10 × log 10 (2 μB)+C+PL[dBm].

[0142] Optionally, the first forwarding power P1 satisfies: P1 = PSD² + 10 × log 10 (B) + C + α × PL [dBm]. For details regarding α, please refer to the relevant content in Method 3 above; it will not be repeated here. For the method of determining road loss, please refer to the relevant description in Method 3; it will not be repeated here.

[0143] For details on the implementation of the second indication information, please refer to the relevant content in the aforementioned determination method two, which will not be repeated here. Similar to the second indication information indicating the first bandwidth, the fourth indication information indicating the first target received power spectral density includes the following three indication methods.

[0144] In the first indication method, the fourth indication information may include the quantized value of the first target received power spectral density. The relay device receives this fourth indication information and can determine the first target received power spectral density, which is relatively simple.

[0145] In indication method two, the fourth indication information includes indication information for a time unit, and the first target received power spectral density is the target received power spectral density in that time unit. The relay equipment receives the fourth indication information and can determine the first target received power spectral density as the target received power spectral density in that time unit based on the time unit indicated by the fourth indication information.

[0146] Optionally, the network device can pre-configure, configure, or predefine one or more associations between target received power spectral densities and time units to the relay device. For example, the network device indicates one or more time units to the relay device, with each time unit associated with a target received power spectral density, and the relay device determines a first target received power spectral density based on the target received power spectral density associated with the current time unit.

[0147] In the third indication method, the fourth indication information includes an index associated with the first target received power spectral density. For example, the network device pre-configures (or configures) or predefines the association between multiple target received power spectral densities and multiple indices to the relay device. The relay device can determine the first target received power spectral density based on the index carried in the fourth indication information and the association.

[0148] Optionally, the index associated with the received power spectral density of each target can also be associated with one or more other parameters, such as beam, time unit, or set of time units.

[0149] Optionally, the network device may also indicate the received power spectral density deviation to the relay device for adjusting the first target received power spectral density. The relay device adjusts the initially determined first target received power spectral density based on the received power spectral density deviation, and the adjusted first target received power spectral density becomes the final first target received power spectral density determined by the relay device. For example, the final first target received power spectral density is the sum of the initially determined first target received power spectral density and the received power spectral density deviation.

[0150] In method five, the first forwarding power indication information includes the indication information of the first forwarding gain. The relay device determines the first forwarding power based on the first forwarding gain and the first received power. The first forwarding gain is the gain of the relay device's forwarding power relative to the received power of the first signal. The first received power is the received power of the relay device when receiving the first signal, or is used to determine the received power of the relay device when receiving the first signal. For example, the first forwarding power is the sum of the first received power (denoted as Pin) and the first forwarding gain (denoted as G1). Since the relay device may control the forwarding power through the forwarding gain during the forwarding process, indicating the forwarding gain to the relay device helps it determine its operating mode in advance.

[0151] Similar to the second indication information indicating the first bandwidth, the first forwarding power indication information indicating the first forwarding gain has the following three indication methods.

[0152] In indication method one, the first forwarding power indication information includes a quantized value of the first forwarding gain, and the relay device determines the first forwarding gain based on this quantized value.

[0153] In indication method two, the first forwarding power indication information includes indication information for one time unit, and the first forwarding gain is the forwarding gain in that time unit. The relay device receives the first forwarding power indication information and can determine the forwarding gain in that time unit as the first forwarding gain. For example, taking time unit U as an example, if the power gain in time unit U is G3, then G1 = G3.

[0154] Optionally, the network device can pre-configure, configure, or predefine one or more associations between forwarding gains and time units to the relay device. For example, the network device indicates one or more time units of a cycle to the relay device, with each time unit of a cycle associated with a forwarding gain. The relay device determines a first forwarding gain based on the forwarding gain associated with the current time unit. For example, the relay device determines the first forwarding gain as the forwarding gain associated with the current time unit.

[0155] In the third indication method, the first forwarding power indication information includes an index associated with the first forwarding gain. For example, the network device pre-configures (or configures) or predefines the association between multiple forwarding gains and multiple indices to the relay device. The relay device can determine the first forwarding gain based on the index carried in the first forwarding power indication information and the association.

[0156] Optionally, the index associated with each forwarding gain may also be associated with one or more other parameters, such as beam, time unit, or set of time units.

[0157] Optionally, the network device can also indicate a forwarding gain deviation to the relay device for adjusting the first forwarding gain. The relay device adjusts the initially determined first forwarding gain based on this forwarding gain deviation, and the adjusted first forwarding gain becomes the final first forwarding gain determined by the relay device. For example, the final first forwarding gain is the sum of the initially determined first forwarding gain and the forwarding gain deviation. Taking the aforementioned indication method two as an example, where the network device indicates G1 = G2 to the relay device, the network device can also indicate a deviation Δ3 to the relay device, and the relay device can determine G1 = G2 + Δ3. Here, Δ3 can be a positive or negative number.

[0158] In possible implementations, the network device may indicate a first received power to the relay device. The network device indicating the first received power to the relay device includes, but is not limited to, the following five indication methods.

[0159] In one indication method, the network device sends an indication message of the quantized value of the first received power to the relay device. The relay device receives this indication message and determines the first received power. For example, the network device can measure the path loss between the network device and the relay device in advance, and then estimate the first received power based on the determined path loss and the transmission power of the transmitted signal, and send it to the relay device.

[0160] In the second indication method, the network device sends an indication message to the relay device that includes a time unit, where the received power in that time unit is the first received power. Optionally, the network device can pre-configure, configure, or predefine one or more associations between received power and time units to the relay device. For example, the network device indicates one or more time units of a cycle to the relay device, with each time unit of a cycle associated with a received power. The relay device determines the first received power based on the received power associated with the current time unit. For instance, the relay device determines the first received power as the received power associated with the current time unit.

[0161] In the third indication method, the network device pre-configures (or configures) or predefines the association between multiple receive powers and multiple indices (e.g., a fourth mapping relationship) to the relay device. In this case, the network device can indicate the first receive power to the relay device through an index, thus saving signaling overhead. For example, the network device sends indication information including the fourth index to the relay device, and the relay device can determine the first receive power as the receive power associated with the fourth index based on the fourth index and the fourth mapping relationship.

[0162] Optionally, the indexes associated with multiple received powers can also be associated with one or more other parameters. For example, beam, time unit, or set of time units.

[0163] Optionally, the network device may also indicate the received power deviation to the relay device for adjusting the first received power. The relay device adjusts the initially determined first received power based on the bandwidth deviation, and the adjusted first received power becomes the final first received power determined by the relay device. For example, the final first received power is the sum of the initially determined first received power and the received power deviation.

[0164] In the fourth indication method, the network device indirectly indicates the first received power by indicating a reference signal (e.g., a second reference signal) and a first bandwidth to the relay device for determining the first received power. For example, the network device may send second indication information, identification information of the second reference signal, and time-frequency location information of the second reference signal to the relay device. The relay device receives the second reference signal at its time-frequency location, measures the second reference signal, obtains the RSRP of the second reference signal, and then determines the first received power based on the RSRP and the first bandwidth. For example, the first received power Pin1 satisfies: Pin1 = RSRP + 10log 10 (B)[dBm]. Where RSRP is the RSRP of the second reference signal, and B is the first bandwidth. The specific implementation method of the network device indicating the second reference signal to the relay device can refer to the aforementioned specific implementation method of the network device indicating the first reference signal to the relay device, and will not be repeated here.

[0165] Understandably, the relay device measures the second reference signal through the MT module. Therefore, when the antenna used by the MT module differs from that used by the RU module, the relay device can determine the first received power based on the RSRP (denoted as RSRP2) of the second reference signal, the first gain (A[dB] mentioned above), and the first bandwidth. For example, the first received power Pin1 = RSRP2 + 10log 10 (B)-A, where since RSRP is the power on a single RE, the unit of B is the number of subcarriers.

[0166] When the antenna used by the MT module is the same as that used by the RU module, the relay device can determine the first received power based on the RSRP (denoted as RSRP2) of the second reference signal, the coupling coefficient (D mentioned above), and the first bandwidth. For example, the first received power... Or Pin1 = RSRP2 + 10log 10 (B)-D.

[0167] In indication method five, the first forwarding power indication information includes second and sixth indication information. The second indication information indicates the first bandwidth, and the sixth indication information indicates the first received power spectral density. The first received power spectral density is the expected received power of the relay device per unit frequency domain cell by the network device. The relay device determines the first received power based on the first received power spectral density and the first bandwidth.

[0168] For example, the first received power Pin1 satisfies: Pin1 = PSD3 + 10 × log 10 (B) + E[dB]. Where PSD3 is the first received power spectral density, B is the first bandwidth, and E is a parameter affecting power control. E can be a predefined, preconfigured, or agreed-upon value, or it can be configured by the network device or determined by the relay device itself.

[0169] The second and sixth indication information can be carried in a single signaling message or in different signaling messages. For example, when a network device sends a first forwarding power indication message to a relay device, the network device can send the second and sixth indication messages separately, or the network device can send the second and sixth indication messages together. The specific implementation of the second indication information can be found in the relevant content of the aforementioned determination method one, and will not be repeated here. It should be noted that the indication information for indicating the first bandwidth, the indication information for indicating the first received power spectral density, and the indication information for indicating E can be carried in a single signaling message or in different signaling messages; this application embodiment does not impose any restrictions on this. Furthermore, the network device can directly indicate E or indirectly indicate E. For example, the network device can indicate γ and η to the relay device, and the relay device determines E based on γ and η. For example, E = γ + η.

[0170] The indication method of the sixth indication information indicating the first received power spectral density is similar to the indication method of the fourth indication information indicating the first target received power spectral density. For details, please refer to the indication method of the fourth indication information indicating the first target received power spectral density, which will not be repeated here.

[0171] In possible implementations, there is no need for the network device to indicate the first received power to the relay device. The relay device measures the first signal at a sub-time unit within the time unit for forwarding the first signal, thereby determining the first received power. For example, the relay device measures the signal transmitted at the first time sub-unit and determines the first received power based on the obtained measurement result. Here, the first time sub-unit belongs to a first time unit, the start position of the first time sub-unit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located. Optionally, the first time sub-unit can also be located at other positions within the first time unit. Alternatively, the first time sub-unit can be located before the first time unit. For example, the end position of the first time sub-unit is before the start position of the first time unit. Another example is that the end position of the first time sub-unit is the same as the start position of the first time unit.

[0172] Optionally, the network device can also indicate a deviation Δ5 to the relay device for the relay device to adjust the determined first receive power. The final determined first receive power of the relay device is the sum of the initially determined first receive power and the deviation. For example, the first receive power Pin1 satisfies: Pin1 = Pin1_1 + Δ5, where Pin1_1 is the initially determined first receive power of the relay device, and Pin1 is the final determined first receive power of the relay device. Δ5 can be a positive or negative number.

[0173] In the embodiments of this application, the relay device may use one or more of the following determination methods to determine the second forwarding power. The embodiments of this application do not limit which determination method or methods are actually used.

[0174] The relay device can determine the second forwarding power based on the second received power (denoted as Pin2). The second received power can be the input power of the relay device. The relay device can determine the second received power in any of the aforementioned methods for determining the first received power. That is, any of the aforementioned methods for determining the first received power are also applicable to determining the second received power. For example, the network device can send a second indication message and a seventh indication message to the relay device. The seventh indication message indicates the second received power spectral density, which is the received power that the network device expects the relay device to receive per unit frequency domain cell. The relay device determines the second received power based on the first bandwidth and the second received power spectral density. The method by which the seventh indication message indicates the second received power spectral density is similar to the method by which the sixth indication message indicates the first received power spectral density, and will not be repeated here. It should be noted that the method used by the relay device to determine the second received power can be different from the method used by the relay device to determine the first received power. For example, the relay device can determine the first received power based on the second indication method used by the aforementioned network device, and determine the second received power based on the third indication method used by the aforementioned network device. The method used by the relay device to determine the second received power can be the same as the method used by the relay device to determine the first received power.

[0175] As an example, a relay device may determine the second forwarding power as the sum of the second receive power and the relay device's maximum forwarding gain (e.g., referred to as the second forwarding gain). The second forwarding gain can be expressed in dB.

[0176] As another example, the relay device determines the second forwarding power to be the maximum forwarding power corresponding to the second receiving power. In this case, the relay device stores the correlation between the second forwarding power and the second receiving power. By storing this correlation, the relay device can define the second forwarding power as the maximum forwarding power corresponding to the second receiving power, making the implementation relatively simple.

[0177] For example, after determining the second received power Pin2, the repeater can further determine the maximum power that Pin2 can output at the second received power (operating point). It is understandable that, without considering the power amplifier nonlinearity of the repeater, the repeater has multiple forwarding amplification gains. If the repeater determines the maximum forwarding gain G2 [dB], the repeater can determine the second forwarding power P2 = Pin2 + G2 [dBm]. When considering the power amplifier nonlinearity of the repeater, the repeater has pre-stored its input-output power curve at its maximum amplification level, and the output power corresponding to the second received power Pin2 can be obtained. For example... Figure 6 As shown, the input and output power curves of the relay equipment at various amplification levels are illustrated. Figure 6Taking a repeater device with three amplification levels as an example. These three levels correspond to the Ga, Gb, and Gc curves, respectively. From... Figure 6 As can be seen from this, the relay device determines that the maximum forwarding power corresponding to the second receiving power Pin2 is P2.

[0178] Considering that relay equipment is limited by the maximum forwarding power, the relay equipment can determine the third forwarding power, and then determine the target forwarding power.

[0179] For example, a relay device may determine a third forwarding power based on the total transmit power, which is the maximum transmit power determined by the relay device's capabilities or regulatory requirements, and / or, the total transmit power is indicated by the network device.

[0180] For example, the relay device determines the third forwarding power based on the transmit power of the first module and the total transmit power. The first module is used to transmit signals generated by the first module (also referred to as the first module group, first channel, or first unit) to the second device. For instance, the first module is an MT module, used for information feedback to network devices. If the MT module and the RU module share a transmit power limit, the third forwarding power is the total transmit power limit minus the transmit power of the MT module, leaving the remaining power.

[0181] For example, if a relay device needs to both forward uplink data and transmit its own uplink information (processed by the MT module) within a single time unit, then the relay device determines its third forwarding power P3 based on the transmission power of its own uplink information. Assuming local law limits the total transmission power of a relay device to P4 [dBm], and the transmission power used for transmitting its own uplink information is P5 [dBm], then the third forwarding power P3 = 10log 10 (10 0.1×P4 -10 0.1×P5 ).

[0182] After the relay equipment determines the first, second, and third relay powers, it can determine the target relay power as the minimum power among the first, second, and third relay powers. That is, Pout = min(P1, P2, P3).

[0183] Alternatively, the relay device may first determine the forwarding power limit Pmax = min(P2, P3), and then determine Pout = min(P1, Pmax).

[0184] When a network device indicates the gain of a relay device, this application can also be equivalent to a method for the relay device to determine its forwarding gain, that is, the relay device determines its forwarding gain for the first signal as Gout = min(G1, G2, G3 = P3 - Pin2). Here, the first forwarding gain G1 is the forwarding gain indicated by the network device (the indication method and related definitions can be found in the relevant description in determination method five above, and will not be repeated here), the second forwarding gain is the maximum forwarding gain of the relay device (the relevant description can be found in the relevant introduction about the second forwarding power), P3 is the third forwarding power, and Pin2 is the second receiving power, the definitions and determination methods of which are as described above, and will not be repeated here. The third forwarding gain G3 = P3 - Pin2 can be understood as the maximum forwarding gain that the relay device can achieve for the receiving power of the first signal under the maximum forwarding power limitation.

[0185] Alternatively, the relay device can first determine the forwarding gain limit Gmax = min(G2, P3 - Pin2), and then determine Gout = min(G1, Gmax).

[0186] S303. The relay device sends an indication of the forwarding power margin to the network device, and the network device receives the indication of the forwarding power margin sent by the relay device.

[0187] The target forwarding power determined by the relay device may not reach the forwarding power expected by the network device. In this case, the relay device can send forwarding power margin indication information to the network device. This forwarding power margin is the difference between the first and second forwarding powers (or the difference between the second and first forwarding powers), and / or, the difference between the first and third forwarding powers (or the difference between the third and first forwarding powers). By reporting the forwarding power margin to the network device, the relay device informs the network device of the difference between the network device's expected forwarding power and the relay device's actual output forwarding power. This helps the network device decide how to improve the coverage performance of the terminal devices or increase the forwarding gain of the relay device. For example, when the network device's expected forwarding power is less than the relay device's actual output forwarding power, the network device can further improve coverage by increasing the relay device's forwarding power. When the network device's desired forwarding power exceeds the relay device's actual output forwarding power (e.g., the first forwarding power exceeds the third forwarding power), the network device can further improve the coverage performance of the terminal devices under the relay device by repeatedly transmitting data or reducing the bit rate, since the relay device cannot increase its forwarding power. For example, when the first forwarding power is greater than or equal to the second forwarding power but less than the third forwarding power, the relay device's forwarding power has not yet exceeded its maximum forwarding power limit. This can be considered as the relay device's actual output forwarding power being less than the network device's desired forwarding power due to its low input power, or the network device's desired forwarding gain exceeding the relay device's maximum forwarding gain. In this case, the network device can improve coverage by allocating more frequency domain resources to the terminal devices under the relay device. That is, it can increase the relay device's forwarding power while maintaining the power spectral density and forwarding gain, allowing the network device to indicate a more reasonable forwarding power to the relay device. It should be noted that S303 is not a mandatory step. Figure 3 The middle part is indicated by a dashed line.

[0188] Optionally, when the first forwarding power is greater than or equal to the third forwarding power, the relay device reports the difference between the first and third forwarding powers. When the first forwarding power is greater than or equal to the second forwarding power, the relay device reports the difference between the first and second forwarding powers.

[0189] Optionally, when the first forwarding power is greater than or equal to the third forwarding power, the relay device reports the difference between the first and third forwarding powers. When the first forwarding power is less than or equal to the third forwarding power, and the first forwarding power is greater than or equal to the second forwarding power, the relay device reports the difference between the first and second forwarding powers.

[0190] It should be noted that the difference between the first and second forwarding power can be either P1-P2 or P2-P1. The difference between the first and third forwarding power can be either P1-P3 or P3-P1.

[0191] It is understood that in this application, the difference between the first forwarding power and the third forwarding power is equal to the difference between the first forwarding gain and the third forwarding gain; the difference between the first forwarding power and the second forwarding power is equal to the difference between the first forwarding gain and the second forwarding gain. Similar to relay devices reporting forwarding power margins, relay devices can also send forwarding gain margin indication information, where the forwarding gain margin is the difference between the first forwarding gain and the second forwarding gain (or the difference between the second forwarding gain and the first forwarding gain), and / or, the forwarding gain margin is the difference between the first forwarding gain and the third forwarding gain (or the difference between the third forwarding gain and the first forwarding gain). Relay devices can report forwarding gain margins to network devices to notify them of the difference between the forwarding gain expected by the network device and the forwarding gain that the relay device can actually output. When network devices need to further improve the coverage performance of terminal devices served by relay devices, this helps network devices decide whether to further increase forwarding power or forwarding gain, or to use other means (such as time-repeated transmission or allocation of more frequency domain resources).

[0192] Optionally, when the first forwarding gain is greater than or equal to the third forwarding gain, or when the first forwarding power is greater than or equal to the third forwarding power, the relay device reports the difference between the first forwarding power and the third forwarding power, or the difference between the first forwarding gain and the third forwarding gain. When the first forwarding gain is greater than or equal to the second forwarding gain, the relay device reports the difference between the first forwarding gain and the second forwarding gain.

[0193] Optionally, when the first forwarding gain is greater than or equal to the third forwarding gain, or when the first forwarding power is greater than or equal to the third forwarding power, the relay device reports the difference between the first forwarding power and the third forwarding power, or the difference between the first forwarding gain and the third forwarding gain. When the first forwarding gain is less than or equal to the third forwarding gain, or when the first forwarding power is less than or equal to the third forwarding power, and the first forwarding gain is greater than or equal to the second forwarding gain, the relay device reports the difference between the first forwarding gain and the second forwarding gain.

[0194] It should be noted that the difference between the first forwarding gain and the second forwarding gain can be either G1-G2 or G2-G1. The difference between the first forwarding gain and the third forwarding gain can be either G1-G3 or G3-G1.

[0195] S304. The relay device sends a first indication message to the network device, and the network device receives the first indication message sent by the relay device. The first indication message is used to indicate the type of forwarding power margin.

[0196] The type of forwarding power margin refers to whether the forwarding power margin is the difference between the first and second forwarding powers, or the difference between the first and third forwarding powers. The relay device can also indicate the type of forwarding power margin to the network device, specifying whether it is the difference between the first and second forwarding powers or the difference between the first and third forwarding powers. This allows the network device to determine why the relay device cannot output the corresponding forwarding power, facilitating the network device to indicate a more reasonable forwarding power to the relay device. For example, when the forwarding power margin is the difference between the first and second forwarding powers (P1 is greater than P2), the relay device can send a first indication message to the network device. This first indication message indicates the power margin type, which in turn indicates that the forwarding power margin is the difference between the first and second forwarding powers. When the network device sends a first gain indication message to the relay device, the relay device can effectively report the difference between the first forwarding gain and the relay device's maximum forwarding gain. Upon receiving the first indication message, the network device can determine that the network device's desired forwarding power is greater than the power the relay device can actually forward. In this situation, the network device may assume that the relay device's input power is too low or its gain is limited, causing it to be unable to output the forwarding power expected by the network device. When the forwarding power margin is the difference between the first and third forwarding powers (i.e., P1 is greater than P3), the first indication information indicates the power margin type, which states that the forwarding power margin is the difference between the first and third forwarding powers. Upon receiving the first indication information, the network device can determine that its expected forwarding power exceeds regulatory limits or enters the nonlinear saturation region of the relay device's power amplifier, thus preventing the relay device from outputting the expected forwarding power.

[0197] The type of forwarding power margin reported by a relay device can also be understood as the type of forwarding gain margin that the relay device can report. The type of forwarding gain margin refers to whether the forwarding gain margin is the difference between the first and second forwarding gains, the difference between the first and third forwarding gains, or the difference between the first and third forwarding powers. This allows network devices to determine why the relay device cannot output a corresponding forwarding gain, facilitating the network device to indicate a more reasonable forwarding gain to the relay device.

[0198] It is understandable that if S303 is not executed, then S304 will not be executed either. Therefore, S304 is not a mandatory step. Figure 3 The diagram is illustrated with dashed lines. The execution order of S301 and S302 is not restricted. For example, S302 can be executed synchronously with S301.

[0199] In the embodiments of this application, the relay device considers not only the forwarding power expected by the network device and the maximum forwarding power limit of the relay device, but also the forwarding power that the relay device can achieve using the maximum forwarding gain under a given input power. Therefore, through the method provided in the embodiments of this application, the relay device can output forwarding power that matches its own capabilities or the expectations of the network device.

[0200] The embodiments provided in this application describe the methods provided by the embodiments of this application from the perspectives of relay devices, terminal devices, network devices, and the interactions between relay devices, terminal devices, and network devices. To implement the functions of the methods provided in the embodiments of this application, the relay devices, terminal devices, and network devices may include hardware structures and / or software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules.

[0201] The communication apparatus used to implement the above method in the embodiments of this application is described below with reference to the accompanying drawings. Exemplarily, Figure 7 A schematic block diagram of a communication device 700 provided in an embodiment of this application is shown. The communication device 700 can be a relay device, capable of implementing the relay device functions in the methods provided in this application. The communication device 700 can also be a device capable of supporting the relay device in implementing the corresponding functions in the methods provided in this application, wherein the communication device 700 can be a chip system. In this application embodiment, the chip system can be composed of chips or may include chips and other discrete devices. Specific functions can be found in the descriptions of the above method embodiments. The communication device 700 can also be a relay device, capable of implementing the relay device functions in the methods provided in this application. The communication device 700 can also be a device capable of supporting the relay device in implementing the corresponding functions in the methods provided in this application. The communication device 700 can be a chip system. The chip system can be composed of chips or may include chips and other discrete devices. Specific functions can be found in the descriptions of the above method embodiments.

[0202] The communication device 700 includes one or more processors 701, which can be used to implement or support the communication device 700 in implementing the relay device function in the method provided in the embodiments of this application. See the detailed description in the method examples for details, which will not be repeated here. The one or more processors 701 can also be used to implement or support the communication device 700 in implementing the relay device function in the method provided in the embodiments of this application. See the detailed description in the method examples for details, which will not be repeated here. The processor 701 can also be called a processing unit or processing module, and can implement certain control functions. The processor 701 can be a general-purpose processor or a dedicated processor, etc. For example, it includes: a central processing unit, an application processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, a memory, and / or a neural network processor, etc. The central processing unit can be used to control the communication device 700, execute software programs, and / or process data. Different processors can be independent devices or integrated into one or more processors. For example, they can be integrated on one or more application-specific integrated circuits.

[0203] Optionally, the communication device 700 includes one or more memories 702 for storing instructions 704, which can be executed on the processor 701 to cause the communication device 700 to perform the method described in the above method embodiments. The memories 702 and the processor 701 can be provided separately or integrated together, or they can be considered coupled. The coupling in this embodiment is an indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, used for information exchange between devices, units, or modules. The processor 701 may operate in conjunction with the memory 702. At least one of the at least one memories may be included in the processor. It should be noted that the memory 702 is not mandatory. Figure 7 The image is indicated by a dashed line.

[0204] Optionally, the memory 702 may also store data. The processor and memory can be configured separately or integrated together. In this embodiment, the memory 702 can be non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or it can be volatile memory, such as random-access memory (RAM). Memory is any other medium capable of carrying or storing desired program code in the form of instructions or data structures, and accessible by a computer, but is not limited thereto. The memory in this embodiment can also be a circuit or any other device capable of implementing storage functions, used to store program instructions and / or data.

[0205] Optionally, the communication device 700 may include instructions 703 (sometimes referred to as code or program), which can be executed on a processor to cause the communication device 700 to perform the methods described in the above embodiments. Data may be stored in the processor 701.

[0206] Optionally, the communication device 700 may also include a transceiver 705 and an antenna 706. The transceiver 705 may be referred to as a transceiver unit, transceiver module, transceiver, transceiver circuit, transceiver, input / output interface, etc., and is used to realize the transmission and reception functions of the communication device 700 through the antenna 706.

[0207] The processor 701 and transceiver 705 described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency identification (RFID) integrated circuits, mixed-signal ICs, ASICs, printed circuit boards (PCBs), or electronic devices. The communication apparatus described herein can be a standalone device (e.g., a standalone integrated circuit, a mobile phone, etc.) or a part of a larger device (e.g., a module embedded in other devices). For details, please refer to the foregoing descriptions of terminal devices and network devices; further details will not be repeated here.

[0208] Optionally, the communication device 700 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, internal memory, a universal serial bus (USB) interface, a power management module, an antenna, a speaker, a microphone, an input / output module, a sensor module, a motor, a camera, or a display screen, etc. It is understood that in some embodiments, the communication device 700 may include more or fewer components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.

[0209] It should be noted that the communication device in the above embodiments can be a relay device or a circuit, or it can be a chip applied in a relay device or other combined devices or components that have the above-mentioned relay device functions (or the first device). When the communication device is a relay device, the transceiver module can be a transceiver, which may include an antenna and radio frequency circuits, etc.

[0210] When the communication device is a chip-based device or circuit, it may include a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit and / or a communication interface; the processing unit may be an integrated processor, microprocessor, or integrated circuit.

[0211] This application also provides a communication system. The communication system includes at least one relay device, at least one terminal device, and at least one network device. Exemplarily, the communication system includes a relay device, a terminal device, and a network device for implementing the relevant functions provided in the various embodiments of this application. Please refer to the relevant descriptions in the above method embodiments for details, which will not be repeated here.

[0212] This application also provides a computer-readable storage medium including instructions that, when run on a computer, cause the computer to perform the method executed by the relay device in this application embodiment.

[0213] This application also provides a computer program product, including instructions that, when run on a computer, cause the computer to perform the method executed by the relay device in this application embodiment.

[0214] This application provides a chip system including a processor and potentially a memory, for implementing the functions of the relay device in the aforementioned method. The chip system can be composed of chips or may include chips and other discrete devices.

[0215] In this application embodiment, the number of nouns, unless otherwise specified, refers to "singular nouns or plural nouns," that is, "one or more." "At least one" means one or more, and "more than one" means two or more (including two). "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. For example, A / B means: A or B.

[0216] In this application, the ordinal numbers such as "first" and "second" mentioned are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, application scenario, priority, or importance of the multiple objects. For example, the first reference signal and the second reference signal can be the same reference signal or different reference signals, and such names do not indicate that the size, priority, or importance of the two reference signals are different.

[0217] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0218] Those skilled in the art will recognize that the various illustrative logical blocks and steps described in connection with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution.

[0219] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A communication method, characterized in that, include: The relay device determines a target forwarding power based on a first forwarding power, a second forwarding power, and a third forwarding power. The target forwarding power is the minimum power among the first forwarding power, the second forwarding power, and the third forwarding power. The first forwarding power is determined based on the indication of the network device. The second forwarding power is related to the input power of the relay device and the forwarding gain of the relay device. The third forwarding power is determined based on the maximum forwarding power limit of the relay device. The relay device uses the target forwarding power to forward the first signal received from the first device to the second device.

2. The method as described in claim 1, characterized in that, The method further includes: The relay device sends an indication of the forwarding power margin, wherein the forwarding power margin is the difference between the first forwarding power and the second forwarding power, and / or the difference between the first forwarding power and the third forwarding power.

3. The method as described in claim 2, characterized in that, When the forwarding power margin is the difference between the first forwarding power and the second forwarding power, the method further includes: The relay device sends a first indication message, the first indication message indicating a power margin type, the power margin type indicating that the forwarding power margin is the difference between the first forwarding power and the second forwarding power; or... When the forwarding power margin is the difference between the first forwarding power and the third forwarding power, the method further includes: The relay device sends a first indication message, which indicates a power margin type. The power margin type indicates that the forwarding power margin is the difference between the first forwarding power and the third forwarding power.

4. The method as described in claim 3, characterized in that, When the first forwarding power is greater than or equal to the third forwarding power, the forwarding power margin transmitted by the relay device includes the difference between the first forwarding power and the third forwarding power; when the first forwarding power is greater than or equal to the second forwarding power, the forwarding power margin includes the difference between the first forwarding power and the third forwarding power; or; When the first forwarding power is greater than or equal to the third forwarding power, the forwarding power margin sent by the relay device includes the difference between the first forwarding power and the third forwarding power; when the first forwarding power is less than or equal to the third forwarding power, and the first forwarding power is greater than or equal to the second forwarding power, the forwarding power margin includes the difference between the first forwarding power and the third forwarding power.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives a second indication information and a third indication information, wherein the second indication information indicates a first bandwidth and the third indication information indicates a first forwarding power spectral density; wherein the first bandwidth is the bandwidth of the first signal and the first forwarding power spectral density is the forwarding power that the network device expects the relay device to achieve per unit frequency domain unit. The relay device determines the first forwarding power based on the first bandwidth and the first forwarding power spectral density.

6. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives a second indication information and a fourth indication information. The second indication information is used to indicate a first bandwidth, which is the bandwidth of the first signal. The fourth indication information is used to indicate a first target received power spectral density, which is the expected received power of the second device in a unit frequency domain cell. The relay device determines the first forwarding power based on the first target received power spectral density, the first bandwidth, and the first path loss, wherein the first path loss is the path loss between the relay device and the second device.

7. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives a fifth indication information, which is used to indicate a first target receiving power, and the first target receiving power is the receiving power expected by the second device; The relay device determines the first forwarding power based on the first target receiving power and the first path loss, wherein the first path loss is the path loss between the relay device and the second device.

8. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives an indication of the value of the first forwarding power and determines the first forwarding power based on the value of the first forwarding power.

9. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives an indication of a first deviation, which is used to adjust the first forwarding power. The adjusted first forwarding power is the sum of the first forwarding power and the first deviation.

10. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives indication information of a first forwarding gain, wherein the first forwarding gain is the gain of the relay device's forwarding power for the first signal relative to the receiving power of the first signal; The relay device determines the first forwarding power based on the first forwarding gain and the first receiving power, wherein the first receiving power is the receiving power of the relay device when receiving the first signal.

11. The method as described in claim 10, characterized in that, The method further includes: The relay device measures the signal transmitted on the first time subunit and determines the first received power based on the obtained measurement results; wherein, the first time subunit belongs to the first time unit, the start position of the first time subunit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located; or, the first time subunit is before the first time unit, and the end position of the first time subunit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located.

12. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives a second reference signal and a second indication information, the second indication information being used to indicate a first bandwidth, the first bandwidth being the bandwidth of the first signal; The relay device determines a first receiving power based on the reference signal received power RSRP of the second reference signal and the first bandwidth. The first receiving power is used to determine the receiving power for receiving the first signal. After determining the first receiving power, the relay device receives the first signal. The relay device determines the first forwarding power based on the first forwarding gain and the first receiving power, wherein the first forwarding gain is the gain between the forwarding power of the relay device for the first signal and the receiving power of the first signal.

13. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device receives a second indication information and a sixth indication information. The second indication information indicates a first bandwidth, which is the bandwidth of the first signal. The sixth indication information indicates a first received power spectral density, which is the received power of the relay device expected by the network device per unit frequency domain unit. The relay device determines a first received power based on the first bandwidth and the first received power spectral density. The first received power is used to determine the received power for receiving the first signal. After determining the first received power, the relay device receives the first signal. The relay device determines the first forwarding power based on the first forwarding gain and the first receiving power, wherein the first forwarding gain is the gain between the forwarding power of the relay device for the first signal and the receiving power of the first signal.

14. The method as described in claim 1, characterized in that, The method further includes: The relay device determines the second forwarding power based on the second receiving power of the relay device, wherein the second receiving power is the receiving power of the relay device when receiving the first signal or is used to determine the receiving power of the relay device when receiving the first signal.

15. The method as described in claim 14, characterized in that, The second forwarding power is the sum of the second receiving power and the third gain, whereby the third gain is the maximum forwarding gain of the relay device.

16. The method as described in claim 14, characterized in that, The second forwarding power is the maximum forwarding power corresponding to the second receiving power, and the relay device stores the correlation between the second forwarding power and the second receiving power.

17. The method according to any one of claims 14-16, characterized in that, The method further includes: The relay device receives a second reference signal and a second indication information, the second indication information being used to indicate a first bandwidth, the first bandwidth being the bandwidth of the first signal; The relay device determines the second received power based on the RSRP of the second reference signal and the first bandwidth.

18. The method according to any one of claims 14-16, characterized in that, The method further includes: The relay device measures the signal transmitted on the first time subunit and determines the second received power based on the obtained measurement results; wherein, the first time subunit belongs to the first time unit, the start position of the first time subunit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located; or, the first time subunit is before the first time unit, and the end position of the first time subunit is the same as the start position of the first time unit, and the first time unit is the time unit where the first signal is located.

19. The method according to any one of claims 14-16, characterized in that, The method further includes: The relay device receives a second indication information and a seventh indication information. The second indication information indicates a first bandwidth, which is the bandwidth of the first signal. The seventh indication information indicates a second received power spectral density, which is the received power of the relay device expected by the network device per unit frequency domain unit. The relay device determines the second received power based on the first bandwidth and the second received power spectral density.

20. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device determines the third forwarding power based on the total transmission power, which is the maximum transmission power determined by the relay device's capabilities, and / or the total transmission power is indicated or pre-configured by the network device.

21. The method as described in claim 20, characterized in that, The relay device determines the third forwarding power based on the total transmitted power, including: The relay device determines the third forwarding power based on the transmission power of the first module and the total transmission power, wherein the first module is used to send the signal of the relay device to the second device.

22. A relay device, characterized in that, The relay device includes a processor and a memory, the memory for storing a computer program, and the processor for executing the computer program stored in the memory, causing the relay device to perform the method as described in any one of claims 1-21.

23. A chip, characterized in that, The chip is located within the relay device and includes at least one processor and an interface. The processor is used to read and execute instructions stored in a memory, and when the instructions are executed, causes the relay device to perform the method as described in any one of claims 1-21.

24. A communication system, characterized in that, This includes the relay equipment as described in claim 22, as well as terminal equipment and network equipment.

25. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when run on a relay device, causes the relay device to perform the method as described in any one of claims 1-21.

26. A computer program product, characterized in that, The computer program product includes a computer program that, when run on a relay device, causes the relay device to perform the method as described in any one of claims 1-21.

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