Power control method and communication device

Abstract

The embodiment of the invention provides a power control method and a communication device. The method comprises the following steps: generating a data signal subjected to amplitude limiting processing; determining a power offset, the power offset being used for determining a transmission power ratio between the data signal and a first channel, the first channel being a channel bearing the data signal; and determining the target sending power of the first channel according to the power offset. Thus, the sending power ratio between the data signal and the first channel is determined according to the power offset, and then the target sending power of the first channel can be determined, so that the offset, generated on a constellation diagram, of a modulation symbol borne by the data signal due to amplitude limiting processing of the data signal can be compensated; therefore, the misjudgment probability when the receiving end demodulates the data signal can be reduced.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a power control method and a communication device. Background Art

[0002] In the signal transmission between a sending end and a receiving end, the receiving end can obtain the modulation information (such as modulation and coding scheme (MCS)) used by the sending end when sending a data signal. Furthermore, the receiving end can demodulate the received signal according to the modulation information. Among them, to improve the sensing performance, the sending end processes the frequency-domain waveform of the data signal during the process of sending the data signal. For example, the frequency-domain waveforms with relatively low amplitudes are enhanced, thereby reducing the fluctuations of the frequency-domain waveform of the data signal.

[0003] However, for the data signal processed as above, when the receiving end demodulates according to the modulation information corresponding to the data signal, misjudgment will occur, resulting in an increase in the bit error rate. Therefore, how to reduce the bit error rate during the data signal transmission process is an urgent problem to be solved currently. Summary of the Invention

[0004] The power control method and the communication device provided in the embodiments of this application can reduce the bit error rate during the data signal transmission process.

[0005] To achieve the above object, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a power control method is provided. This method can be executed by a first device. The first device can be the terminal device itself, or can refer to a processor, module, chip, or chip system in the terminal device that implements this method; or, the first device can be the access network device itself, or can refer to a processor, module, chip, or chip system in the access network device that implements this method. Hereinafter, an example will be given with this method being executed by the first device. The method includes: generating a data signal after clipping processing; determining a power offset, where the power offset is used to determine the transmission power ratio between the data signal and a first channel, and the first channel is the channel carrying the data signal; and determining the target transmission power of the first channel according to the power offset.

[0007] Since in the embodiments of this application, the first device can determine the power offset and determine the transmission power ratio between the data signal and the first channel according to the power offset, and further can determine the target transmission power of the first channel to compensate for the offset of the modulation symbols carried by the data signal on the constellation diagram due to the clipping processing, thereby reducing the misjudgment probability when the receiving end demodulates the data signal. Therefore, based on the power control method provided in the embodiments of this application, the bit error rate during the data signal transmission process can be reduced.

[0008] In a possible implementation, the method provided by the first aspect further includes: sending indication information, where the indication information is used to indicate a power offset. That is, when the power offset is determined by the first device, the first device can send the indication information of the power offset to the second device, so that the second device can determine the transmission power ratio between the data signal and the reference signal associated with the first channel according to the power offset, and determine the amplitude of the received data signal according to the transmission power ratio, thereby reducing the bit error rate when the second device demodulates the data signal.

[0009] In a possible implementation, the method provided by the first aspect further includes: receiving indication information, where the indication information is used to indicate a power offset. That is, the power offset can be indicated, and the first device can determine the power offset according to the indication information, which can increase the flexibility of the first device to determine the power offset to be applicable to different scenarios.

[0010] In a second aspect, a power control method is provided. This method can be executed by a second device. The second device can be the terminal device itself, or a processor, module, chip, or chip system in the terminal device that implements this method; or the second device can be the access network device itself, or a processor, module, chip, or chip system in the access network device that implements this method. Hereinafter, an example will be given with this method being executed by the second device. The method includes: generating indication information and sending the indication information. The indication information is used to indicate the power offset corresponding to the data signal after clipping processing, and the power offset is used to determine the transmission power ratio between the data signal and the first channel, where the first channel is the channel carrying the data signal.

[0011] In a third aspect, a power control method is provided. This method can be executed by a second device. The second device can be the terminal device itself, or a processor, module, chip, or chip system in the terminal device that implements this method; or the second device can be the access network device itself, or a processor, module, chip, or chip system in the access network device that implements this method. Hereinafter, an example will be given with this method being executed by the second device. The method includes: receiving indication information and determining the power offset according to the indication information. The indication information is used to indicate the power offset corresponding to the data signal after clipping processing, and the power offset is used to determine the transmission power ratio between the data signal and the first channel, where the first channel is the channel carrying the data signal.

[0012] For the technical effects of the above second and third aspects, reference can be made to the first aspect, and details will not be repeated here.

[0013] Combining the above first to third aspects, in a possible implementation, the indication information includes first indication information, and the first indication information is used to determine a power offset from a set of candidate power offsets, where the set of candidate power offsets includes at least two power offsets. It can be understood that at least two power offsets in the set of candidate power offsets can be configured with corresponding indexes or identifiers one by one, and further, the first indication information can be the index or identifier. That is to say, the first indication information can be the index or identifier of the power offset in the set of candidate power offsets, thereby reducing the indication overhead of the indication information and improving the reliability of the indication information.

[0014] Combining the above first to third aspects, in a possible implementation, the indication information further includes second indication information, and the second indication information is used to indicate the set of candidate power offsets. That is to say, the second device can configure the set of candidate power offsets for the first device to indicate to the first device multiple power offsets expected by the second device within a next period of time (for example, during the duration of a radio resource control (RRC) connection).

[0015] Combining the above first to third aspects, in a possible implementation, the power offset is the ratio of the transmission power between a data signal and a first channel; or, the power offset is the ratio between the actual amplitude of a modulation symbol and the amplitude of the constellation point corresponding to the modulation symbol, where the modulation symbol is the modulation symbol carried by the data signal; or, the power offset is the difference between the complex value corresponding to the modulation symbol and the complex value of the constellation point corresponding to the modulation symbol. That is to say, the power offset can be the ratio of the transmission power between a data signal and a first channel, or the amplitude ratio or complex value difference between the modulation symbol carried by the data signal and the constellation point corresponding to the modulation symbol, thereby enabling the first device to flexibly determine the power offset to be applicable to different scenarios.

[0016] Combining the above first to third aspects, in a possible implementation, the target transmission power is determined according to the power offset and the power control parameter of the first channel. The power control parameter of the first channel includes at least one of the following: the maximum transmission power of the terminal device, the open-loop power control parameter, the closed-loop power control parameter, or the modulation and coding scheme (MCS). The open-loop power control parameter is used to determine the open-loop power of the first channel, the closed-loop power control parameter is used to determine the closed-loop power adjustment value of the first channel, and the MCS is used to determine the MCS power adjustment amount. That is to say, the first device can determine the target transmission power of the first channel according to the uplink power control parameter and the power offset, thereby having a small change in the uplink power control method of the system, good compatibility, and reducing the implementation complexity.

[0017] Combining the above first to third aspects, in a possible implementation manner, the transmission power ratio between the data signal and the first channel includes any one of the following: the ratio between the transmission power of the data signal and the open-loop power of the first channel; the ratio between the transmission power of the data signal and the closed-loop power adjustment value of the first channel; the ratio between the transmission power of the data signal and the MCS power adjustment amount of the first channel; or, the ratio between the transmission power of the data signal and the maximum transmission power of the terminal device corresponding to the first channel. That is to say, the transmission power ratio between the data signal and the first channel can include various corresponding power adjustment amounts in uplink power control. Furthermore, the first device can adjust the uplink power control in various different ways, and further support the first device to flexibly determine the target transmission power of the first channel.

[0018] Combining the above first to third aspects, in a possible implementation manner, the open-loop power includes the target receiving power and / or the path loss compensation power; the ratio between the transmission power of the data signal and the open-loop power of the first channel includes: the ratio between the transmission power of the data signal and the target receiving power, or, the ratio between the transmission power of the data signal and the path loss compensation power. That is to say, for the power offset amount which is the ratio between the transmission power of the data signal and the open-loop power, the power offset amount can be continuously effective during the RRC connection period, so that the first device can determine the target transmission power of the first channel according to the power offset amount during the RRC connection period, and thus the network overhead can be saved.

[0019] Combining the above first to third aspects, in a possible implementation manner, the target receiving power includes the common target receiving power and the dedicated target receiving power of the terminal device. The ratio between the transmission power of the data signal and the target receiving power includes: the ratio between the transmission power of the data signal and the common target receiving power, or, the ratio between the transmission power of the data signal and the dedicated target receiving power. That is to say, for the power offset amount which is the ratio between the transmission power of the data signal and the common target receiving power, this power offset amount can correspond to multiple terminal devices in the cell, thereby further saving the network overhead. For the power offset amount which is the ratio between the transmission power of the data signal and the dedicated target receiving power of the terminal device, this power offset amount can be configured for a specific terminal device in the cell, thereby increasing the flexibility of configuring the power offset amount.

[0020] Combining the above first to third aspects, in a possible implementation, the target transmit power is determined based on the adjusted open-loop power and at least one of the following: the closed-loop power adjustment value, the MCS power adjustment amount, and the maximum transmit power of the terminal device. The adjusted open-loop power is obtained by adjusting the open-loop power according to the power offset. That is to say, by adjusting the open-loop power in the uplink power control, the first device can determine the target transmit power of the first channel, which can further reduce the modification of the uplink power control and improve compatibility.

[0021] Combining the above first to third aspects, in a possible implementation, the target transmit power is determined based on the adjusted closed-loop power adjustment value and at least one of the following: the open-loop power, the MCS power adjustment amount, and the maximum transmit power of the terminal device. The adjusted closed-loop power adjustment value is obtained by adjusting the closed-loop power adjustment value according to the power offset. That is to say, by adjusting the closed-loop power adjustment value in the uplink power control, the first device can determine the target transmit power of the first channel, which can further reduce the modification of the uplink power control and improve compatibility.

[0022] Combining the above first to third aspects, in a possible implementation, the ratio between the transmit power of the data signal and the MCS power adjustment amount is used to adjust the number of bits per resource element BPRE. That is to say, the first device can adjust the BPRE through the power offset to achieve fast and dynamic adjustment of the transmit power of the first channel. For example, the first device can send a scheduling request (SR) or a buffer state report (BSR) to the second device, and the second device can determine the MCS and power offset for scheduling the first device based on the SR or BSR from the first device. Furthermore, the first device can adjust the transmit power of the first channel according to the scheduled MCS and power offset.

[0023] Combining the above first to third aspects, in a possible implementation, the target transmit power is determined based on the adjusted MCS power adjustment amount and at least one of the following: the open-loop power, the closed-loop power adjustment value, and the maximum transmit power of the terminal device. The adjusted MCS power adjustment amount is obtained by adjusting the MCS power adjustment amount according to the power offset. That is to say, by adjusting the BPRE in the uplink power control, the first device can determine the target transmit power of the first channel, which can further reduce the modification of the uplink power control and improve compatibility.

[0024] Combining the above first to third aspects, in a possible implementation, the ratio between the transmission power of the data signal and the maximum transmission power of the terminal device includes: the ratio or difference between the maximum back-off power MPR value and the pre-configured MPR value. That is to say, for the power offset which is the ratio or difference between the MPR value and the pre-configured MPR value, the power offset can adjust the maximum transmission power of the terminal device through the MPR value, with little change to the uplink power control, good system compatibility, and can enable the first device to effectively determine the target transmission power of the first channel in the scenario of reducing the transmission power of the first channel.

[0025] Combining the above first to third aspects, in a possible implementation, the target transmission power is determined according to the adjusted maximum transmission power of the terminal device and at least one of the following: open-loop power, closed-loop power adjustment value, and MCS power adjustment amount, and the adjusted maximum transmission power of the terminal device is obtained by adjusting the maximum transmission power of the terminal device according to the power offset. That is to say, the first device can determine the target transmission power of the first channel by adjusting the maximum transmission power of the terminal device in the uplink power control through the MPR, which can further reduce the change to the uplink power control and improve compatibility.

[0026] Combining the above first to third aspects, in a possible implementation, the power offset is the transmission power ratio between the data signal and the reference signal associated with the first channel; or, the power offset is the energy per resource element EPRE ratio between the data signal and the reference signal; or, the power offset is the ratio between the transmission power ratio and the pre-configured transmission power ratio, and the pre-configured transmission power ratio is the EPRE ratio between the first channel and the reference signal. That is to say, the power offset can be the transmission power ratio between the data signal and the reference signal, or the corresponding EPRE ratio between the two, or the ratio between the transmission power ratios of the two and the pre-configured transmission power ratio. Furthermore, the first device can flexibly determine the target transmission power according to different power offsets to be applicable to different scenarios

[0027] Combining the above first to third aspects, in a possible implementation, the target transmission power is determined according to the power offset and the transmission power of the reference signal. That is to say, in the case where the first device determines the transmission power of the reference signal, the target transmission power of the first channel can be determined according to the transmission power of the reference signal and the power offset, which is easy to implement

[0028] Combining the above first to third aspects, in a possible implementation, the reference signal includes: a demodulation reference signal DMRS, and / or, a phase tracking reference signal PTRS. That is to say, the first device can determine the target transmission power of the first channel according to the power offset and the transmission power of the DMRS and / or PTRS, thereby further improving the flexibility of the first device to determine the target transmission power. For example, when the first channel does not carry the PTRS but carries the DMRS, the first device can determine the target transmission power of the first channel according to the power offset and the transmission power of the DMRS. Another example is that in high-frequency transmission and when the first channel carries both the DMRS and the PTRS, the first device can preferably determine the target transmission power of the first channel according to the power offset and the transmission power of the PTRS. Still another example is that when the first device is a high-speed moving terminal device and the first channel carries both the DMRS and the PTRS, the first device can preferentially determine the target transmission power of the first channel according to the power offset and the transmission power of the DMRS.

[0029] Combining the above first to third aspects, in a possible implementation, the power offset is associated with the transmission parameters for transmitting signals, and the transmission parameters include at least one of the following: the MCS for transmitting data signals, the modulation method for transmitting data signals, the constellation diagram for transmitting data signals, the modulation order for transmitting data signals, or the clipping threshold for clipping data signals. That is to say, when the transmission parameters have been determined, the first device or the second device can determine the power offset according to the association relationship between the power offset and the transmission parameters and the transmission parameters; or, when the power offset has been determined, the first device or the second device can determine the transmission parameters according to the association relationship between the power offset and the transmission parameters and the power offset, thereby improving the flexibility of the first device or the second device to determine the power offset or the transmission parameters, and saving the indication overhead of the power offset or the transmission parameters.

[0030] In a fourth aspect, a communication device is provided for implementing the above various methods. The communication device can be the first device in the first aspect or any of its implementations above, or a device including the first device above, or a device included in the first device above, such as a chip; or, the communication device can be the second device in the second to third aspects or any of its implementations above, or a device including the second device above, or a device included in the second device above, such as a chip. The communication device includes corresponding modules, units, or means for implementing the above methods, and the modules, units, or means can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0031] In some possible designs, the communication device may include a processing module and a transceiver module. The transceiver module, which may also be referred to as a transceiver unit, is used to implement the sending and / or receiving functions in any of the above aspects and any possible implementation manners thereof. The transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface. The processing module may be used to implement the processing functions in any of the above aspects and any possible implementation manners thereof.

[0032] In some possible designs, the transceiver module includes a sending module and a receiving module, which are respectively used to implement the sending and receiving functions in any of the above aspects and any possible implementation manners thereof.

[0033] In a fifth aspect, a communication device is provided, including: at least one processor; the processor is used to execute a computer program or instruction so that the communication device executes the method described in any of the above aspects.

[0034] In a possible implementation, the communication device further includes the memory. Optionally, the memory is coupled to the processor, and the memory may be integrated with the processor, or the memory may be independent of the processor. Optionally, the processor is used to execute the computer program or instruction stored in the memory.

[0035] In a possible implementation, the memory is independent of the communication device.

[0036] In a possible implementation, the communication device further includes a communication interface, and the communication interface is used to communicate with modules outside the communication device.

[0037] The communication device may be the first device in the first aspect or any of its implementation manners above, or a device including the first device above, or a device included in the first device above, such as a chip; or, the communication device may be the second device in the second to third aspects or any of its implementation manners above, or a device including the second device above, or a device included in the second device above, such as a chip.

[0038] In a sixth aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When it runs on a communication device, the communication device can execute the method described in any of the above aspects or any of its implementation manners.

[0039] In a seventh aspect, a computer program product including instructions is provided. When it runs on a communication device, the communication device can execute the method described in any of the above aspects or any of its implementation manners.

[0040] In an eighth aspect, a communication device is provided (for example, the communication device may be a chip or a chip system), and the communication device includes a processor for implementing the functions involved in any of the above aspects or any of its implementation manners.

[0041] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0042] In some possible designs, when the device is a chip system, it may be composed of chips or may include chips and other discrete devices.

[0043] It can be understood that when the communication device provided in any of the fourth to eighth aspects is a chip, the above-mentioned sending action / function can be understood as output, and the above-mentioned receiving action / function can be understood as input.

[0044] Among them, the technical effects brought by any of the design manners in the fourth to eighth aspects can be referred to the technical effects brought by different design manners in the first aspect above, and will not be elaborated here.

[0045] In a ninth aspect, a communication system is provided, and the communication system includes: the first device in the first aspect or any of its implementation manners above, and the second device in the second to third aspects or any of its implementation manners above. Description of the Drawings

[0046] Figure 1 is a schematic diagram of a 4-QAM constellation diagram provided by an embodiment of the present application;

[0047] Figure 2 is a schematic diagram of the frequency-domain waveform of a signal processed by DFT-s-OFDM provided by an embodiment of the present application;

[0048] Figure 3 is a schematic diagram of a modulated symbol after an amplitude scaling operation provided by an embodiment of the present application;

[0049] Figure 4 is a schematic diagram of the waveform after an amplitude scaling operation provided by an embodiment of the present application;

[0050] Figure 5 is a schematic diagram of the offset between the coordinate point corresponding to the original modulated symbol on the constellation diagram and the constellation point corresponding to the original modulated symbol provided by an embodiment of the present application;

[0051] Figure 6 is a schematic diagram of the structure of a communication system provided by an embodiment of the present application;

[0052] Figure 7 is a schematic diagram of the flow of a power control method provided by an embodiment of the present application;

[0053] Figure 8 This is a schematic diagram of the structure of a communication device provided by an embodiment of the present application Figure 1 ;

[0054] Figure 9 This is a schematic diagram of the structure of a communication device provided by an embodiment of the present application Figure 2 。 Detailed implementation manners

[0055] To facilitate the understanding of the technical solutions provided by the embodiments of the present application, a brief introduction to the related technologies of the present application is first given. The brief introduction is as follows:

[0056] First, modulation:

[0057] Modulation may refer to using the changes of relevant parameters of a carrier (such as amplitude, frequency, or phase, etc.) to transmit information (such as data), and mapping the transmitted data (which can be represented by a bit sequence) to modulation symbols.

[0058] Exemplarily, in a communication system (such as a new radio (NR) system, or a long term evolution (LTE) system, etc.), orthogonal modulation may be adopted. Orthogonal modulation may refer to the transmitter (such as an access network device or a terminal device) using two carriers with the same frequency and orthogonal to each other (such as a phase difference of 90°) to modulate data, and then obtaining orthogonal modulation symbols. Orthogonal modulation may also be referred to as IQ modulation. I may be used to represent the in-phase component, and Q may be used to represent the quadrature component.

[0059] Exemplarily, modulation symbols may be represented by complex values, for example, they can be determined by formula (1).

[0060] x = a + i·b = a·cosωt + b·sinωt Formula (1)

[0061] In formula (1), x represents the modulation symbol, a represents the amplitude of the I-channel component, and b represents the amplitude of the Q-channel component. Among them, in the uplink (UL) transmission scheme (that is, the terminal device sends data to the access network device) and the downlink (DL) transmission scheme (the access network device sends data to the terminal device), orthogonal frequency division multiplexing (OFDM) technology can be adopted. Furthermore, the modulation symbol x is mapped one-to-one with subcarriers in the frequency domain, that is, the modulus value of the modulation symbol x can be used to represent the amplitude or power of the frequency domain waveform of the signal carrying the modulation symbol.

[0062] Orthogonal modulation may include: binary phase shift keying (BPSK), π / 2-BPSK, quadrature phase shift keying (QPSK), or quadrature amplitude modulation (QAM), etc. Exemplarily, BPSK may refer to transmitting information by using the phase change of a carrier, and the amplitude and frequency of the carrier remain unchanged. QAM may refer to transmitting information by using the amplitude change and phase change of a carrier, and the frequency of the carrier remains unchanged.

[0063] It can be understood that in BPSK, one modulation symbol can carry one bit (there are two types: "0" and "1" in total), and there are 2 different modulation symbols in total. In QPSK, two bits can be grouped together (there are four types: "00", "01", "11", and "10" in total), and then one modulation symbol can carry two bits, and there are 4 different modulation symbols in total. In 2 m -QAM, the modulation order is m, and one modulation symbol can carry m bits, that is, there are 2 m different modulation symbols in total.

[0064] Exemplarily, in 16-QAM, 2 m = 16, m = 4, and then one modulation symbol can carry 4 bits. In 64-QAM, 2 m = 64, m = 6, and then one modulation symbol can carry 6 bits.

[0065] Second, constellation diagram:

[0066] The constellation diagram can be used to define the amplitude information and phase information of the modulation symbol x, that is, the modulation symbol can be determined through the constellation points in the constellation diagram. Among them, the constellation diagram includes the I axis (for example, it can be the horizontal coordinate axis in the constellation diagram) and the Q axis (for example, it can be the vertical coordinate axis in the constellation diagram), and then the constellation points can be represented by coordinates.

[0067] Exemplarily, Figure 1 is a schematic diagram of a 4-QAM constellation diagram provided by an embodiment of the present application. Among them, since in 4-QAM, each modulation symbol can carry two bits, that is, 2 m = 4, m = 2, so Figure 1 the shown constellation diagram can include 4 constellation points, and each constellation point can carry 2 bits. As Figure 1 shown, taking Figure 1Taking the constellation point (I1, Q1) in the upper right corner as an example, I1 is the coordinate value of this constellation point on the I axis, which is used to represent the amplitude information of the I-channel component in the modulation symbol. Q1 is the coordinate value of this constellation point on the Q axis, which is used to represent the amplitude information of the Q-channel component in the modulation symbol. The vector from the origin (0, 0) to the constellation point (I1, Q1) can be used to represent the modulation symbol, and the vector The included angle φ between the I axis can be used to represent the phase information corresponding to this modulation symbol.

[0068] That is to say, the constellation point (I1, Q1) and the modulation symbol are in one-to-one correspondence, and thus the modulation symbol can be determined through the constellation point. Among them, 1 / E is the normalization factor corresponding to the modulation symbol, and E is the sum of the powers corresponding to the 4 modulation symbols in the constellation diagram.

[0069] It can be understood that the distance from the constellation point to the origin (0, 0) can represent the power of the modulation symbol corresponding to this constellation point. The larger this distance is, the greater the power of the modulation symbol corresponding to this constellation point. Among them, this distance can be called the Euclidean distance.

[0070] Furthermore, each constellation point can correspond to a bit sequence, and this bit sequence can represent the data to be sent. Among them, through the correspondence relationship between the constellation points and the modulation symbols in the constellation diagram, and the correspondence relationship between the constellation points and the bit sequences, the correspondence relationship between the data to be sent and the modulation symbols can be obtained. For example, Figure 1 the constellation point (I1, Q1) in the upper right corner of[] can be in one-to-one correspondence with the bit sequence "01", and thus through the Figure 1 constellation diagram shown, the data bit "01" can be modulated into the modulation symbol

[0071] It can be understood that due to the existence of noise, non-ideal factors of the transmitting device, or non-ideal factors of the receiving device during the transmission process, the modulation symbol obtained by the receiving end for the received signal may be distorted. Furthermore, the coordinate point of this modulation symbol on the constellation diagram falls near the constellation point actually corresponding to this modulation symbol. The receiving end can judge the constellation point corresponding to this modulation symbol according to the distance between the coordinate point corresponding to this modulation symbol on the constellation diagram and the constellation point in the constellation diagram.

[0072] Exemplarily, assume that the coordinate point corresponding to the modulation symbol obtained from the received signal on the constellation diagram falls in Figure 1 the upper right part (i.e., the first quadrant) of[], and the distance between this coordinate point and the constellation point (I1, Q1) corresponding to the bit sequence "01" is the closest. Then the receiving end can judge that the constellation point corresponding to this modulation symbol is the constellation point (I1, Q1), and thus determine that the data sent by the sending end is the bit sequence "01".

[0073] Third, transmit power:

[0074] For a terminal device to send a data signal to an access network device, the transmit power of the data signal is the transmit power of the channel carrying the data signal, and the transmit power of this channel is defined by Technical Specification (TS) 38.213 in the 3rd generation partnership project (3GPP) standard. In addition, the transmit power of the channel is associated with the pilot signal associated with this channel (such as a demodulation reference signal (DMRS), and / or, a phase tracking reference signal (PTRS)).

[0075] It should be understood that the pilot signal and the reference signal can be used interchangeably, and this is explained uniformly here and will not be elaborated below.

[0076] The transmit power of the channel and the association relationship between the channel and the pilot signal are introduced separately below.

[0077] 3.1 Transmit power of the channel

[0078] Taking the case where the data signal is carried on the physical uplink shared channel (PUSCH) as an example, the transmit power of the PUSCH is introduced below.

[0079] The transmit power of the PUSCH can be determined by formula (2).

[0080]

[0081] Among them, the definitions of the parameters in formula (2) are as follows:

[0082] The parameter i can represent the transmission occasion, and i is the index of the time slot within the frame. j is the index of the set of parameters configured by the higher layer signaling. q d is the path loss reference signal resource index. l is the index of the closed-loop power control state. c is the index of the serving cell. f is the index of the carrier. b is the index of the activated bandwidth part (BWP).

[0083] P PUSCH,b , f,c (i, j, q d , l) represents the transmit power of the PUSCH on the activated BWP b of the carrier f of the serving cell c.

[0084] PCMAX,f,c (i) represents the maximum transmit power allowed on carrier f of serving cell c at transmission occasion i, P CMAX,f,c (i) can be configured by higher layer signaling (e.g., radio resource control (RRC) signaling).

[0085] P O_PUSCH,b,f,c (j) can represent the target receive power of the PUSCH on active BWP b of carrier f of serving cell c, that is, the receive power expected by the access network device, P O_PUSCH,b,f,c (j) can be determined according to a set of parameters configured by higher layer signaling, and j is the index of this set of parameters.

[0086] μ represents the subcarrier spacing configuration.

[0087] represents the number of resource blocks (RBs) occupied by the PUSCH on active BWP b of carrier f of serving cell c at transmission occasion i.

[0088] α b,f,c (j) represents the path loss compensation factor corresponding to the PUSCH on active BWP b of carrier f of serving cell c. This path loss compensation factor is configured by the parameter alpha in higher layer signaling, α b,f,c (j) can have a value range of [0,1], for example, {0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1}.

[0089] PL b,f,c (q d ) represents the downlink (DL) path loss estimation corresponding to the PUSCH on active BWP b of carrier f of serving cell c, in dB. This path loss estimation is the downlink path loss estimated by the terminal device according to the path loss reference signal resource index q d The path loss reference signal can be a downlink reference signal such as a channel state information reference signal (CSI-RS) or a Synchronization Signal / PBCH Block (SSB).

[0090] Δ TF,b,f,c (i) is the power adjustment amount determined by the modulation and coding scheme (MCS), representing the MCS power adjustment amount of the PUSCH on active BWP b of carrier f of serving cell c at transmission occasion i. Among them, K s = 1.25 when indicates that different MCSs correspond to different power adjustment amounts (the larger the bits per resource element (BPRE), the greater the transmit power required); K s When K = 0, Δ TF,b,f,c (i) = 0, indicating that the function of adjusting power according to MCS is turned off. K s is provided by the UE-specific parameter deltaMCS. Additionally, when the number of data streams for PUSCH transmission is greater than 1, Δ TF，bf，c (i) = 0.

[0091] For BPRE, when the PUSCH contains data, C represents the number of code blocks (CBs) corresponding to the data transmitted by the PUSCH, K r represents the size of the r-th code block, N RE represents the number of resource elements (REs). represents the number of subcarriers (or REs) occupied by the transmitted data excluding pilot signals (such as DMRS and PTRS), represents the number of symbols (such as OFDM symbols) occupied by the PUSCH on the active BWP b of the carrier f of serving cell c at transmission occasion i, N ≥ 1.

[0092] f b,f,c (i, l) is the closed-loop power adjustment value of the PUSCH on the active BWP b of the carrier f of serving cell c, and l is the index of the closed-loop power control state.

[0093] For the specific description of the above formula (2) and its parameters, reference can be made to the relevant description in TS 38.213, which will not be elaborated here.

[0094] Furthermore, in the NR system, the above data signal can be a data signal processed by OFDM, such as a signal processed by conventional OFDM using a cyclic prefix (CP-OFDM), or a signal processed by discrete fourier transform-spread OFDM (DFT-s-OFDM). Among them, since the waveforms of the signals processed by CP-OFDM and DFT-s-OFDM have different peak to average power ratio (PAPR) characteristics, the linear operation points of the power amplifier of the terminal device on the two waveforms are different. When calculating the maximum transmission power of the terminal device, the maximum power reduction (MPR) values required for different waveforms need to be considered.

[0095] The following introduces MPR.

[0096] TS 38.101 stipulates the MPR values corresponding to CP-OFDM and DFT-s-OFDM under different modulation schemes. Among them, the MPR values are defined separately according to the edge RB, external RB and internal RB configurations. The internal RB configuration range refers to the frequency range where all the configured transmit physical resource blocks (PRBs) are in the middle of the maximum RB configuration bandwidth and are more than or equal to half of the configured transmit PRB away from the bandwidth edge. Otherwise, it is an external RB configuration. The edge RB configuration is that the number of transmit RBs is less than or equal to 2 and is configured at the outermost edge of the bandwidth.

[0097] Exemplarily, Table 1 shows the MPR values corresponding to DFT-s-OFDM and the MPR values corresponding to CP-OFDM under power class 2.

[0098] Table 1

[0099]

[0100] It should be understood that the MPR values corresponding to other power classes can be referred to the relevant descriptions in TS 38.101 and will not be elaborated here.

[0101] 3.2. Association relationship between channels and pilot signals

[0102] It can be understood that the pilot signal can be DMRS or PTRS. The following introduces the association relationship between the channel and DMRS, and the association relationship between the channel and PTRS respectively.

[0103] 3.2.1 Association relationship between channels and DMRS

[0104] For the access network device to send data signals to the terminal device, the data signals can be carried on the physical downlink shared channel (PDSCH). Among them, the transmission power of the PDSCH can be determined according to the transmission power of the reference signal corresponding to the PDSCH and the energy per resource element (EPRE) ratio between the PDSCH and the reference signal.

[0105] It should be understood that when demodulating a non-constant modulus modulation signal (such as a QAM signal), the receiving end can judge the amplitude of the data signal through the ratio of the EPRE of the PDSCH (or PUSCH) and the EPRE of the demodulation reference signal (DMRS) of the corresponding port of the PDSCH. The EPRE ratio between the PDSCH (or PUSCH) and the DMRS EPRE is determined by the number of code division multiplexing (CDM) groups of the DMRS indicated in the downlink control information (DCI) and the DMRS configuration type.

[0106] Exemplarily, the EPRE ratio between the PDSCH and the DMRS is shown in Table 2.

[0107] Table 2

[0108]

[0109] Regarding the transmission power, EPRE, DMRS configuration type of the downlink transmission data signal, and the EPRE ratio between the PUSCH and the DMRS, specific descriptions can be found in TS 38.214 and will not be elaborated here.

[0110] 3.2.2 Association relationship between channels and PTRS

[0111] It should be understood that there is an association between the PTRS and the DMRS (for example, one PTRS port is associated with one DMRS port), and the PTRS can also be used for demodulation. The transmission power ratio between the PUSCH and the PTRS, and the transmission power ratio between the PDSCH and the PTRS are introduced below respectively.

[0112] It can be understood that for uplink transmission, the data signal can be a data signal processed by CP-OFDM or a signal processed by DFT-s-OFDM. Among them, DFT-s-OFDM processing will perform DFT (i.e., transform precoding) before OFDM processing. Furthermore, PUSCH transmission can be divided into PUSCH transmission with enabled transform precoding and PUSCH transmission without enabled transform precoding. Further, for PUSCH transmission with enabled transform precoding, PTRS is mapped before precoding. Furthermore, the transmission power ratio of PTRS between PUSCH transmission without enabled transform precoding and PUSCH transmission with enabled transform precoding is different.

[0113] The following separately introduces the transmission power ratio between PUSCH without enabled transform precoding and PTRS, and the transmission power ratio between PUSCH with enabled transform precoding and PTRS.

[0114] 3.2.2.1. Transmission Power Ratio between PUSCH without Enabled Transform Precoding and PTRS

[0115] The transmission power ratio between PUSCH and PTRS per layer per RE (PUSCH to PTRS power ratio per layer per RE) is where is a factor associated with the transmission power ratio between PUSCH and PTRS. This factor is related to the following parameters: the number Q of PTRS ports used by the terminal device in uplink scheduling p ={1, 2}, the number of layers of PUSCH and the high-layer parameter ptrs-Power. Specifically, refer to Table 3.

[0116] Table 3

[0117]

[0118] The following explains the parameters in Table 3.

[0119] is indicated by the high-layer parameter ptrs-Power, and its value range is [00, 01, 10, 11]. Among them, for all numbers of layers (1 to 4 layers), the corresponding to 10 and 11 is reserved.

[0120] "Full coherent" refers to full coherent transmission, that is, the terminal device supports coherent transmission on all antenna ports. "Partial coherent" refers to partial coherent transmission, that is, the antenna ports within the same coherent transmission group can perform coherent transmission, and the antenna ports between different coherent transmission groups cannot perform coherent transmission. "Non-coherent" refers to non-coherent transmission, that is, no antenna port can perform coherent transmission, or the terminal device does not support coherent transmission. "Non-codebook based" means that the transmission of PUSCH is based on a non-codebook.

[0121] It should be understood that if the terminal device is not configured with the high-layer parameter ptrs-Power, or the PUSCH is non-codebook based, the terminal device assumes that the high-layer parameter ptrs-Power is 00.

[0122] It should be understood that a series of values (such as 0, 3, 3Q p -3, 4.77, or 6) corresponding to 00 or 01 in Table 3 are in units of dB.

[0123] 3.2.2.2, Transmission power ratio between precoded PUSCH and PTRS

[0124] The transmission power ratio between precoded PUSCH and PTRS can be determined by a scaling factor β' (or called the PT-RS scaling factor). Here, β' is the amplitude ratio between one of the outermost constellation points for the modulation scheme used for PUSCH and one of the outermost constellation points for π / 2-BPSK (β'is the ratio between amplitude of one of the outermost constellation points for the modulation scheme used for PUSCH and one of the outermost constellation points for π / 2-BPSK as defined in clause 6.2.3 of [TS 38.214]).

[0125] Table 4

[0126]

[0127] It should be understood that for PDSCH, when the terminal device is scheduled by the network for one or more PTRS ports associated with PDSCH, if the terminal device configures the high-layer parameter epre-Ratio, the EPRE ratio ρ per RE per layer between the PTRS corresponding to the PTRS port and PDSCH PTRS can be determined through Table 5.

[0128] Table 5

[0129]

[0130] It can be understood that the values of the high-layer parameter epre-Ratio in Table 5 are [0, 1, 2, 3], and the ρ corresponding to 2 and 3 PTRS is reserved, and the unit of a series of values (such as 0, 3, 4.77, 6, 7, or 7.78) corresponding to ρ in Table 3 PTRS is dB.

[0131] It should be understood that if the terminal device does not configure the high-layer parameter epre-Ratio, the terminal device assumes that the high-layer parameter epre-Ratio is 0.

[0132] Fourth, sensing:

[0133] Sensing may refer to a communication entity (such as an access network device or a terminal device) in a wireless network obtaining information about the surrounding environment by sending and receiving signals after being affected by an object. Among them, the information about the surrounding environment may include information about one or more objects in the environment. The information about an object may include the position, shape, or speed of the object, etc. These objects can change the transmission characteristics of the signal, such as changing the transmission direction of the signal, changing the transmission gain of the signal, changing the transmission delay of the signal, or changing the frequency of the signal, etc. Therefore, the communication entity can achieve sensing by obtaining the change in the signal transmission characteristics. For example, the channel response information obtained through channel estimation can reflect the change of the signal after passing through different transmission environments (or called channels), and then when the signal passes through the above objects, the channel response information reflects the change of the signal transmission characteristics caused by the objects.

[0134] Exemplarily, the channel response information may include channel frequency response (CFR), or channel state information (CSI), etc., and the embodiments of the present application do not make specific limitations thereto.

[0135] It should be understood that the "signal after being affected by an object" mentioned above may include: a signal after being reflected by an object, a signal after being refracted by an object, a signal after being scattered by an object, a signal after being diffracted by an object, or a signal after being transmitted by an object, etc., and no specific limitation is made thereto.

[0136] The above signal may be a signal processed by OFDM, such as a signal processed by CP-OFDM, or a signal processed by DFT-s-OFDM. Among them, for the signal processed by DFT-s-OFDM, the peak to average power ratio (PAPR) of its waveform is relatively low, which can meet the coverage requirements and is applicable to sensing services.

[0137] It should be understood that for a multi-carrier superimposed signal processed similarly to OFDM, there may be large fluctuations in its frequency-domain waveform. For example, Figure 2 is a schematic diagram of the frequency-domain waveform of a signal processed by DFT-s-OFDM. As Figure 2 shown, the abscissa is the sub-carrier index (including 240 sub-carriers), and the ordinate is the amplitude corresponding to the sub-carrier. Figure 2 The shown frequency-domain waveform has large fluctuations, which is not conducive to sensing. The specific reasons are as follows:

[0138] Both CFR and CSI characterize the influence of the channel on the transmitted signal in the frequency domain. The relationship between the received signal and the transmitted signal in the frequency domain can be expressed by formula (3).

[0139] Y[k] = H[k]X[k] + N[k] Formula (3)

[0140] Among them, k represents the sub-carrier, Y[k] represents the frequency-domain amplitude of the received signal corresponding to sub-carrier k, X[k] represents the frequency-domain amplitude of the transmitted signal corresponding to sub-carrier k, N[k] represents the frequency-domain amplitude of the noise corresponding to sub-carrier k, and H[k] represents the channel frequency-domain response corresponding to sub-carrier k, that is, the channel response information to be solved.

[0141] Furthermore, for Figure 2 the sub-carriers with smaller amplitudes, X[k] in formula (3) is smaller, and thus Y[k] is smaller. Therefore, when solving H[k], Y[k] needs to be amplified. However, amplifying Y[k] will amplify the noise N[k], and further lead to inaccurate solution of the channel frequency-domain response, thus resulting in impaired sensing performance.

[0142] It can be understood that by reducing the fluctuations of the frequency-domain waveform of the signal, the degree of impaired sensing performance can be reduced. For example, by means of floor clipping, the amplitude of the lower part of the waveform can be increased, that is, the modulus of the modulation symbol with a lower modulus is amplified, thereby reducing the amplification factor of the above Y[k], or avoiding the amplification of Y[k], so as to reduce the degree of impaired sensing performance, or avoid the impairment of sensing performance. The following specifically introduces floor clipping.

[0143] Fifth, floor clipping:

[0144] In a possible implementation, the transmitting end can amplify the modulus of the modulation symbols in the modulation symbol sequence whose modulus is lower than the clipping threshold. Among them, the modulation symbol sequence can be a modulation symbol sequence obtained by adjusting data according to a constellation diagram, and each modulation symbol can be mapped to a subcarrier.

[0145] Furthermore, after the modulation symbol whose modulus is lower than the clipping threshold is amplified, its modulus can be equal to the clipping threshold, and the phase remains unchanged, that is, the included angle φ remains unchanged.

[0146] Exemplarily, the above modulus amplification operation can be represented by formula (4).

[0147]

[0148] In formula (4), X(n) can represent a modulation symbol in the modulation symbol sequence, n is the number of the modulation symbol in the modulation symbol sequence, and n can correspond to the subcarrier index. angle(X(n)) represents the included angle corresponding to the modulation symbol. Th can represent the clipping threshold.

[0149] For example, taking Figure 1 the modulation symbol corresponding to the constellation point (I1, Q1) in as an example of Th·e j2π*angle(X(n)) operation, it is described in combination with Figure 3 . As Figure 3 shown, the modulation symbol corresponding to the constellation point (I1, Q1) is X(n), and the included angle φ is angle(X(n)). Assume that the modulus |X(n)| of the modulation symbol X(n) is less than the clipping threshold Th. After the modulation symbol X(n) undergoes the Th·e j2 π*angle(X(n)) operation, the coordinate point corresponding to the amplified modulation symbol X(n) is located on the circumference with the origin as the center and a radius of Th, and the included angle corresponding to the amplified coordinate point remains unchanged. Among them, the vector from the origin (0, 0) to the amplified coordinate point can represent: the modulation symbol after the modulus amplification of the modulation symbol X(n) is Th·e j2π*angle(X(n)) . The modulation symbol Th·e j2π*angle(X(n)) after modulus amplification can be: the vector The vector sum with the vector That is, Figure 3 The vector in can represent the sign introduced by the magnitude amplification operation. Since the introduced sign does not actually transmit data, the introduced sign can be regarded as an interference sign.

[0150] It can be understood that the magnitude amplification operation corresponding to the above formula (4) is only an example, and other magnitude amplification methods can also be adopted, such as not requiring the phase to remain unchanged. In addition, the above magnitude amplification operation can be performed before subcarrier mapping. The modulated symbol sequence after the magnitude amplification operation can generate a signal through subcarrier mapping, OFDM processing, etc.

[0151] Furthermore, based on the frequency-domain waveform of the signal generated from the modulated symbols after the above magnitude amplification operation, compared with the original frequency-domain waveform without the above magnitude amplification operation, the partial waveforms in the original frequency-domain waveform with amplitudes less than the clipping threshold will be eliminated. For example, taking Figure 2 the frequency-domain waveform in Figure 2 as the original frequency-domain waveform, when the clipping threshold is 0.5, Figure 4 the partial waveforms in the original frequency-domain waveform in

[0152] after the above magnitude amplification operation are eliminated, as specifically shown in Figure 3 It can be understood that the above magnitude amplification operation will introduce an interference sign (i.e., the introduced interference sign in

[0153] Furthermore, the clipped signal generated according to the modulated symbol sequence after the above magnitude amplification operation can include: a data signal for carrying the original modulated symbol sequence, and an interference signal for carrying the interference sign. When the receiving end receives the clipped signal, it will regard the interference signal as noise and suppress it, and then obtain the data signal, and then perform demodulation according to the data signal.

[0154] It can be understood that when the above-mentioned clipping signal is sent, the data signal and the interference signal will be sent simultaneously. Among them, the ratio between the transmission power of the data signal and the transmission power of the interference signal can be determined according to the clipping threshold. Further, the interference signal will occupy the transmission power originally allocated for sending data, that is, the allocated transmission power is for the data signal carrying the original modulation symbol. Thus, when the data signal and the interference signal are sent simultaneously, the interference signal will occupy the allocated transmission power, resulting in the actual transmission power of the data signal being less than the allocated transmission power. Further, the actual transmission power of the data signal being less than the allocated transmission power will cause the modulus value of the original modulation symbol to shrink proportionally. Furthermore, the Euclidean distance value corresponding to the original modulation symbol in the constellation diagram will also shrink proportionally, resulting in an offset between the coordinate point corresponding to the original modulation symbol in the constellation diagram and the constellation point.

[0155] For example, the transmission power allocated for the data signal by the transmitter is 10 power units, and the transmission power of the interference signal is 3 power units. Thus, the transmission power of the data signal is 7 units, and the transmission power of the data signal shrinks from 10 units to 7 units, that is, the transmission power of the data signal shrinks to 7 / 10 of the original 10 power units. That is, the modulus value of each original modulation symbol in the original modulation symbol sequence carried by the data signal shrinks proportionally to 7 / 10 of the original modulus value. Therefore, there is an offset between the coordinate point corresponding to the original modulation symbol in the constellation diagram and the constellation point corresponding to the original modulation symbol.

[0156] The following combines Figure 5 to further illustrate the above offset.

[0157] Figure 5 is the constellation diagram corresponding to 64-QAM. As Figure 5 shown, the black dots represent the constellation points in the 64-QAM constellation diagram, and the unfilled dots represent the coordinate points corresponding to the original modulation symbols after being reduced proportionally in the constellation diagram. From Figure 5 it can be seen that the coordinate points corresponding to the original modulation symbols that should originally correspond one-to-one with the constellation points shift towards the origin due to the proportional reduction of the modulus value of the original modulation symbols.

[0158] It can be understood that the larger the clipping threshold in the above modulus amplification operation, the larger the modulus value of the interference symbol, and further the greater the proportion of the reduction of the modulus value of the original symbol, thus increasing the probability of misjudgment when the receiver demodulates the signal.

[0159] For example, taking Figure 5Taking the constellation point corresponding to the original modulation symbol #1 during modulation as constellation point #1 as an example, when the clipping threshold is relatively large, the coordinate points of the original modulation symbol #1 after being scaled down proportionally are closer to constellation point #2 relative to constellation point #1. As a result, the symbol obtained by the receiving end when receiving the data signal is closer to constellation point #2, and thus the constellation point corresponding to this symbol will be misjudged as constellation point #2.

[0160] That is to say, the larger the clipping threshold in the above-mentioned modulus amplification operation, the higher the bit error rate of signal transmission.

[0161] Based on this, the embodiment of the present application provides a power control method, which can reduce the bit error rate during the transmission of data signals.

[0162] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0163] To facilitate the understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0164] 1. In the embodiments of the present application, for the convenience of description, when referring to numbers or indexes, continuous numbering can start from 1, or start from 0, or start numbering from any parameter.

[0165] 2. "Predefined", "pre - defined", "pre - configured (or pre - configured in advance)", and "protocol agreement" can be used interchangeably. The pre - definition can be achieved by pre - storing the corresponding codes, tables or other means that can be used to indicate relevant information in a device (such as the first device or the second device). The embodiments of the present application do not limit its specific implementation method. Among them, "store" can mean storing in one or more memories.

[0166] 3. The "protocol" involved in the embodiments of the present application can refer to standard protocols in the communication field, such as the long - term evolution (LTE) protocol, the new radio (NR) protocol, wireless fidelity (Wi - Fi), and related protocols applied to future communication systems (such as the 6th generation (6G) communication system). The embodiments of the present application do not limit this.

[0167] 4. In the embodiments of the present application, descriptions such as "when...", "in the case of...", "if", and "when" all refer to the situation where the device (such as the first device or the second device) will perform corresponding processing under certain objective circumstances, which does not limit time, and does not require the device to have a judgment action during implementation, nor does it mean other limitations.

[0168] 5. In the embodiments of the present application, "sending information to... (the first device)" can be understood as the destination of the information being the first device, which may include directly or indirectly sending information to the first device. "Receiving information from... (the second device)" or "receiving information originating from... (the second device)" can be understood as the source of the information being the second device, which may include directly or indirectly receiving information from the second device. Necessary processing may be performed on the information between the source and the destination of the information transmission, such as format conversion, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly and will not be elaborated here.

[0169] 6. In the description of the embodiments of the present application, unless otherwise specified, "and / or" in the embodiments of the present application represents three possible relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Here, A and B can be singular or plural. Also, "at least one of the following" or its similar expressions refer to any combination of these items, including any combination of single-item or plural-item combinations. Additionally, for the sake of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and "first" and "second" do not necessarily mean different. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations.

[0170] The embodiments of the present application can be applied to LTE systems or NR systems (which can also be referred to as fifth-generation (5G) systems), systems with hybrid LTE and NR networking, vehicle-to-everything (V2X) systems, device-to-device (D2D) systems, machine-to-machine (M2M) communication systems, Internet of Things (IoT) systems (such as narrow band Internet of Things (NB-IoT) systems), Wi-Fi systems, non-terrestrial networks (NTN) systems, 6G systems, and other next-generation communication systems. Or, the communication system can also be an open radio access network (O-RAN or ORAN), or a cloud radio access network (CRAN), without limitation.

[0171] It can be understood that the embodiments of the present application can be applied to a variety of different service scenarios, such as enhanced mobile broadband (eMBB), ultra-reliable and low-latency services (URLLC), massive machine type communication (mMTC), immersive communication, massive communication, ubiquitous connections, integrated artificial intelligence and communication, or integrated sensing and communication, etc. To meet the further requirements for latency, reliability, and coverage in the above different service application scenarios, more flexible resource allocation is needed.

[0172] In addition, the communication architecture and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art can know that with the evolution of the communication architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0173] As Figure 6 shown, it is a schematic structural diagram of a communication system 600 provided by an embodiment of the present application. Figure 6 It is exemplified that the communication system 600 includes at least one access network device (such as Figure 6 610a or 610b in Figure 6 ), and at least one terminal device connected to the access network device (such as Figure 6 620a to 620j in

[0174] In a possible implementation, the access network device in the embodiments of the present application may be a device communicating with a terminal device. The access network device may also be referred to as a RAN device, an access node, a RAN entity, or a RAN node, etc. As Figure 6 shown, multiple access network devices in the communication system 600 may be of the same type of nodes or different types of nodes. In some scenarios, the roles of the access network device and the terminal device are relative. For example Figure 6 the network element 620i in may be a helicopter or a drone, which may be configured as a mobile base station. For the terminal devices 620j accessing the communication system 600 through the network element 620i, the network element 620i may be the base station 610a; but for the base station 610a, the network element 620i is a terminal device. The access network device and the terminal device are sometimes both referred to as communication devices. For example Figure 6 the network elements 610a and 610b in may be understood as communication devices with base station functions, and the network elements 620a - 620j may be understood as communication devices with terminal functions.

[0175] In a possible scenario, the access network device may be a transmission and reception point (TRP), a base station, a remote radio unit (RRU) of a distributed base station, or a baseband unit (BBU) (which may also be referred to as a digital unit (DU)), a broadband network gateway (BNG), an aggregation switch, a non-6GPP access device, a relay station, or an access point, etc. The access network device may be a macro base station (such as Figure 6 the network element 610a in ), a micro base station or an indoor station (such as Figure 6 the network element 610b in ), a relay node or a donor node, or a radio controller in a CRAN scenario. Optionally, the access network device may also be a server, a wearable device, a vehicle, or a vehicle-mounted device, etc. For example, the access network device in the V6X system may be a roadside unit (RSU). In addition, the access network device in the embodiments of the present application may be an eNB or eNodeB (evolutional NodeB) in LTE, a radio controller in a CRAN scenario, a base station in a 5G communication system (such as a next-generation node B (gNodeB, gNB)), or a base station in a future evolved system (such as a 6G communication system), etc., which is not specifically limited herein.

[0176] In a possible implementation, in some deployments, the gNB may include a centralized unit (CU), a DU, a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and / or packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical (PHY) layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the PHY layer. The AAU implements some physical layer processing functions, radio frequency processing, and functions related to active antennas. Since the information of the RRC layer will ultimately become the information of the PHY layer, or is transformed from the information of the PHY layer, thus, in this architecture, high-layer signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or sent by the DU + AAU. It can be understood that the access network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be classified as an access network device in the RAN, or the CU may be classified as an access network device in the CN. The embodiments of the present application do not make any limitations in this regard.

[0177] In different systems, the CU (or CU-CP and CU-UP), DU, or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU may also be referred to as an O-CU (open CU), the DU may also be referred to as an O-DU, the CU-CP may also be referred to as an O-CU-CP, the CU-UP may also be referred to as an O-CU-UP, and the RU may also be referred to as an O-RU. For the convenience of description, the embodiments of the present application describe using CU, CU-CP, CU-UP, DU, and RU as examples. Any one of the CU (or CU-CP, CU-UP), DU, and RU in the embodiments of the present application may be implemented through a software module, a hardware module, or a combination of a software module and a hardware module.

[0178] In a possible implementation, the terminal device in the embodiments of the present application may be a device for implementing wireless communication functions, such as a terminal or a chip that can be used in a terminal. Among them, the terminal may be a user equipment (UE), access terminal, terminal unit, terminal station, mobile station, mobile device, remote station, remote terminal, mobile device, or terminal agent in a 5G network or a future evolved public land mobile network (PLMN). The access terminal may be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, VR terminal device, AR terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. In a possible implementation, the terminal device may be mobile or fixed, and this is not limited.

[0179] It can be understood that the above communication system 600 can support a variety of different service application scenarios, such as enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), massive machine type communication (mMTC), immersive communication, massive communication, ubiquitous connections, integrated artificial intelligence and communication, or integrated sensing and communication, etc. The embodiments of the present application do not make specific limitations thereto.

[0180] The embodiments of the present application provide a power control method, and the execution subject of this method can be a first device. Among them, the first device can be Figure 6 a terminal device in, or a module or unit of the terminal device (such as a chip, chip system, chip circuit, or circuit of the terminal device), or an access network device, or a module or unit of the access network device (such as a chip, chip system, chip circuit, or circuit of the access network device).

[0181] In a possible implementation manner, the first device generates a data signal after clipping processing; the first device determines a power offset, and the power offset is used to determine the transmission power ratio between the data signal and the first channel, and the first channel is the channel carrying the data signal; the first device determines the target transmission power of the first channel according to the power offset. In this way, the first device can determine the power offset, and determine the transmission power ratio between the data signal and the first channel according to the power offset, and then can determine the target transmission power of the first channel to compensate for the offset generated by the modulation symbols carried by the data signal on the constellation diagram due to the clipping processing, so as to reduce the misjudgment probability when the receiving end demodulates the data signal. Therefore, based on the power control method provided by the embodiments of the present application, the bit error rate during the transmission of the data signal can be reduced.

[0182] Next, the above method provided by the embodiments of the present application will be described in detail in conjunction with Figure 7 , and the above method provided by the embodiments of the present application will be elaborated.

[0183] It should be understood that the signals between various devices or apparatuses, the names of the parameters in the signals, or the names of the information carried by the signals, etc. in the following embodiments of the present application are only examples. In specific implementations, other names may also be used, and the embodiments of the present application do not make specific limitations thereto.

[0184] In addition, the method provided in the embodiments of the present application can be applied to be executed by a first device. Wherein, the first device may be the terminal device described above, Figure 6 or a module or unit of the terminal device (such as a chip, a chip system, a chip circuit, or a circuit, etc. of the terminal device), and the second device may be the access network device described above, Figure 6 or a module or unit of the access network device (such as a chip, a chip system, a chip circuit, or a circuit, etc. of the access network device).

[0185] Wherein, the first device may operate in a high-frequency band, such as a millimeter-wave band or a terahertz band, or may also operate in a low-frequency band, such as 700 MHz, 900 MHz, 2.1 GHz, 2.6 GHz, or 3.5 GHz band, etc. It can be understood that the first device may also operate in other frequency bands supported by the 6G system, and the embodiments of the present application do not make specific limitations thereto.

[0186] It can be understood that the first device may operate in the RRC active state, the RRC inactive state, the RRC idle state, or other RRC states or RRC modes defined in the 6G communication system, and the embodiments of the present application do not make specific limitations thereto.

[0187] For ease of understanding, the following takes the first device as the execution subject as an example to detail Figure 7 the power control method flow shown.

[0188] Figure 7 is a schematic flow diagram of a power control method provided by an embodiment of the present application. As Figure 7 shown, the method includes the following steps:

[0189] S701. The first device generates a data signal after amplitude limiting processing.

[0190] S702. The first device determines a power offset. Wherein, the power offset is used to determine the transmission power ratio between the data signal and the first channel. The first channel is the channel carrying the data signal.

[0191] S703. The first device determines the target transmission power of the first channel according to the power offset.

[0192] The above steps S701 to S703 will be described in detail below.

[0193] For step S701:

[0194] It can be understood that the data signal can be a multi-carrier superimposed signal, such as a signal processed by DFT-s-OFDM or CP-OFDM. Among them, when the first device is a terminal device, the data signal can be an uplink data signal. When the first device is an access network device, the data signal can be a downlink data signal. It should be understood that the downlink data signal in the embodiments of the present application can be a signal processed by DFT-s-OFDM.

[0195] It should be understood that the clipping process can be the aforementioned "downward clipping" process, such as the modulus amplification process represented by formula (4). Of course, the clipping process in the embodiments of the present application can also be upward clipping; or the clipping process can include: downward clipping and upward clipping. Upward clipping can refer to clipping the part of the waveform with a higher amplitude, that is, performing a modulus reduction operation on the modulation symbol with a higher modulus value. It can be understood that after the upward clipping process, the modulus value of the modulation symbol carried by the data signal will be amplified proportionally, which will in turn cause an offset between the coordinate point (or constellation point) corresponding to the modulation symbol on the constellation diagram and the actual corresponding constellation point, thus increasing the probability of misjudgment when the receiving end demodulates the signal.

[0196] It should also be understood that the clipping process corresponding to formula (4) is only an example. The clipping process can also be to superimpose other signals in the frequency domain and / or time domain before the modulation symbol resource mapping, or to superimpose other signals in the frequency domain and / or time domain after the modulation symbol completes the resource mapping. Several examples of the clipping process are listed below.

[0197] Exemplarily, the clipping process can be to place the interference signal at a position orthogonal to the original signal (i.e., the data signal before the clipping process). For example, taking the original signal as a single-carrier offset QAM (OQAM) signal, assuming that K complex QAM symbols are separated into K real parts and K imaginary parts, and then a 2K-length OQAM symbol sequence is generated, then each OQAM symbol can be expressed as a + i·b, that is, the OQAM signal is placed in the pattern of "real, imaginary, real, imaginary". The clipping process can be to set the interference signal as "imaginary, real, imaginary, real", that is, each interference symbol can be expressed as i·a + b, so as to achieve the orthogonality between the interference signal and the original signal.

[0198] Another example is to oversample the above original signal, and the specific sampling sequence is [QAM symbol, 0, QAM symbol, 0,...]. Place the interference symbol corresponding to the interference signal on the element "0" in the above sampling sequence to obtain the sequence [QAM symbol, interference symbol, QAM symbol, interference symbol,...], thereby achieving the orthogonality between the interference signal and the original signal.

[0199] It can be understood that in the above example, the interference signal is made orthogonal to the original signal in the time domain, and the interference signal can also be made orthogonal to the original signal in the frequency domain. For example, for an original signal that is an OQAM signal, after the original signal is subjected to DFT, a frequency-domain signal is obtained, and the interference signal added to this frequency-domain signal satisfies conjugate negative symmetry, that is, the interference signal can be made orthogonal to the original signal. Among them, conjugate negative symmetry can refer to: if n < N / 4; if n > 3N / 4. a is the interference signal added at position n (i.e., frequency-domain unit n), b is the interference signal added at the symmetric position, and N is the total number of frequency-domain units occupied by the original signal.

[0200] For another example, for an original signal that is a QAM signal, after the original signal is subjected to DFT, a frequency-domain signal is obtained, and the frequency-domain signal is replicated twice to obtain a replicated signal R = [r(N / 2 + 1:N), r(1:N), r(1:N / 2)]. Then, the interference signal added to the replicated signal satisfies negative symmetry, that is, the interference signal can be made orthogonal to the original signal. It should be understood that the method of introducing the interference signal in the clipping process is not limited to the above several types, and other methods can also be used to achieve it. For example, multiplying by a filter in the frequency domain, or convolving with a filter in the time domain, etc. The embodiments of the present application do not make specific limitations in this regard.

[0201] It can be understood that for the data signal after the clipping process, the constellation points corresponding to the modulation symbols carried by it can shift in the direction towards the origin, that is, the actual transmission power of the data signal will decrease. For example, for the data signal after downward clipping (specifically, reference can be made to Figure 5 ). Or, for the data signal after the clipping process, the constellation points corresponding to the modulation symbols carried by it can shift in the direction away from the origin, that is, the actual transmission power of the data signal will increase. For example, for the data signal after upward clipping.

[0202] It can also be understood that the clipping threshold in the above clipping process can be the clipping threshold determined by the first device according to the measurement result or the perceived performance requirement, or the clipping threshold is indicated. The embodiments of the present application do not make specific limitations in this regard.

[0203] It should be understood that for the specific implementation of the first device to generate the data signal after the clipping process, reference can be made to the aforementioned "downward clipping", which will not be elaborated here.

[0204] For steps S702 and S703:

[0205] It can be understood that since the data signal is the data signal after clipping processing, the transmission power of the data signal is different from the allocated or configured transmission power, that is, the transmission power of the data signal is different from the transmission power of the first channel carrying the data signal. For example, in the case where the clipping processing is the above-mentioned downward clipping processing, the transmission power of the data signal is less than the transmission power of the first channel. Another example is that in the case where the clipping processing is upward clipping processing, the transmission power of the data signal may be greater than the transmission power of the first channel.

[0206] It should be understood that in the embodiments of the present application, for the first device being a terminal device, the first channel may be an uplink channel, such as PUSCH, or other uplink channels carrying modulation symbols (such as physical uplink control channels); for the first device being an access network device, the first channel may be a downlink channel, such as PDSCH, or other downlink channels carrying modulation symbols (such as physical downlink control channels), and the embodiments of the present application do not make specific limitations on this.

[0207] It can be understood that in the embodiments of the present application, the power offset may be pre-configured, or determined by the first device, or indicated by the network side; or negotiated in advance between the first device and the network, and the embodiments of the present application do not make specific limitations on this.

[0208] It should be understood that according to whether the power offset directly represents the power relationship between the data signal and the reference signal associated with the first channel, it can be divided into two schemes. For ease of understanding, the power offset and step S703 are described separately as Scheme 1 and Scheme 2 below.

[0209] Scheme 1:

[0210] In a possible implementation manner, the power offset is the ratio of the transmission power between the data signal and the reference signal associated with the first channel; or, the power offset is the ratio of the energy per resource element EPRE between the data signal and the reference signal; or, the power offset is the ratio between the ratio of the transmission power and the pre-configured ratio of the transmission power, and the pre-configured ratio of the transmission power is the EPRE ratio between the first channel and the reference signal. That is to say, the power offset can be the ratio of the transmission power between the data signal and the reference signal, or the corresponding EPRE ratio between the two, or the ratio between the ratio of the transmission power of the two and the pre-configured ratio of the transmission power. Furthermore, the first device can flexibly determine the target transmission power according to different power offsets to be applicable to different scenarios.

[0211] In a possible implementation, the target transmission power is determined according to the power offset and the transmission power of the reference signal. For example, the first device determines the target transmission power of the first channel according to the power offset (step S703), including: the first device determines the target transmission power of the first channel according to the power offset and the transmission power of the reference signal associated with the first channel. That is to say, when the first device determines the transmission power of the reference signal, it can determine the target transmission power of the first channel according to the transmission power of the reference signal and the power offset, which is easy to implement.

[0212] For example, for the first channel being the PDSCH, the first device (i.e., the access network device) can determine the target transmission power of the first channel according to the EPRE of the reference signal (or the transmission power of the reference signal) and the power offset. Among them, for the power offset being the ratio of the transmission power between the data signal and the reference signal, if the power offset is a linear value, the target transmission power = the transmission power of the reference signal × the power offset; if the power offset is a logarithmic value, the target transmission power = the transmission power of the reference signal + the power offset. For the power offset being the ratio between the ratio of the transmission power and the pre-configured ratio of the transmission power, the power offset actually represents the ratio of the transmission power between the data signal and the first channel. If the power offset is a linear value, the target transmission power = the transmission power of the reference signal × (the pre-configured ratio of the transmission power × the power offset); if the power offset is a logarithmic value, the target transmission power = the transmission power of the reference signal × (the pre-configured ratio of the transmission power + the power offset).

[0213] It can be understood that the above method for determining the target transmission power is only an example, and the target transmission power can also be determined in other ways according to the power offset and the transmission power of the reference signal. The embodiments of the present application do not make specific limitations in this regard.

[0214] In a possible implementation, the reference signal includes: DMRS, and / or, PTRS. That is to say, the first device can determine the target transmission power of the first channel according to the power offset and the transmission power of the DMRS and / or PTRS, which can further improve the flexibility of the first device to determine the target transmission power. For example, when the first channel does not carry PTRS but carries DMRS, the first device can determine the target transmission power of the first channel according to the power offset and the transmission power of the DMRS. For another example, in high-frequency transmission, when the first channel carries DMRS and PTRS, the first device can preferably determine the target transmission power of the first channel according to the power offset and the transmission power of the PTRS. For still another example, when the first device is a high-speed moving terminal device and the first channel carries DMRS and PTRS, the first device can preferentially determine the target transmission power of the first channel according to the power offset and the transmission power of the DMRS.

[0215] The power offset in the above Scheme 1 will be further described below.

[0216] It can be understood that as shown in the aforementioned Tables 2 to 5, the transmission power ratio between the first channel and the reference signal (e.g., the transmission power of the first channel / the transmission power of the reference signal) is pre-configured by the protocol (i.e., the pre-configured transmission power ratio). Then, according to the aforementioned Tables 2 to 5 and the power offset, the transmission power ratio between the data signal and the first channel can be determined.

[0217] The following takes the reference signal as DMRS as an example for illustration.

[0218] It can be understood that the transmission power ratio between the first channel and DMRS is equal to the EPRE ratio between the first channel and DMRS.

[0219] For the power offset being the transmission power ratio between the data signal and DMRS, according to the relevant description in Table 2 above, when the number of DMRS CDM groups without data is 1, the transmission power of the first channel is the same as that of DMRS (i.e., the pre-configured transmission power ratio is 1). Then, the transmission power of the first channel can be represented by the transmission power of DMRS. In other words, the transmission power ratio between the data signal and the first channel can be equal to: the transmission power ratio between the data signal and DMRS, that is, the power offset is equal to the transmission power ratio between the data signal and DMRS.

[0220] It should be understood that when the number of DMRS CDM groups without data is greater than 1, the pre-configured transmission power between the first channel and DMRS is not the same, but the ratio between the two is the EPRE ratio specified in TS 38.214 (see Table 2 specifically). That is, the above-mentioned pre-configured transmission power ratio between the first channel and DMRS can be represented according to this EPRE ratio.

[0221] For example, taking the transmission power ratio between the data signal and DMRS (i.e., the power offset) as: the transmission power of the data signal / the transmission power of DMRS = 1 / 4 (i.e., 0.25) as an example, in Table 2 above, when the number of DMRS CDM groups without data is equal to 2, the pre-configured transmission power ratio is: -3 dB (i.e., 0.5), that is, the transmission power of DMRS / the transmission power of the first channel = 1 / 2 (i.e., 0.5). Then, the transmission power ratio between the data signal and the first channel can be determined to be 1 / 8. It can be understood that the power offset can also be expressed in dB. For example, the power offset can be -6 dB, and the transmission power ratio between the data signal and the first channel is -9 dB.

[0222] For the power offset which is the EPRE ratio between the data signal and the reference signal, this EPRE ratio is equal to the transmission power ratio between the above-mentioned data signal and the DMRS, which will not be elaborated here.

[0223] For the power offset which is the ratio between the transmission power ratio and the preconfigured transmission power ratio, the transmission power ratio between the data signal and the first channel can also be determined according to this ratio. It can be understood that

[0224] Similarly, for the preconfigured transmission power ratio being: the transmission power of the reference signal / the transmission power of the first channel, and the transmission power ratio being: the transmission power of the data signal / the transmission power of the reference signal, in this case, the power offset is the product of the transmission power ratio and the preconfigured transmission power ratio.

[0225] For example, in Table 1 mentioned above, when the number of DMRS CDM groups without data is equal to 3, the preconfigured transmission power ratio is: -4.77 dB, that is, the transmission power of the DMRS / the transmission power of the first channel = 1 / 3 (i.e., 0.33), and the transmission power ratio between the data signal and the DMRS is: the transmission power of the data signal / the transmission power of the DMRS = 1 / 2 (i.e., 0.25). Then, the power offset can be the product 1 / 6 between the two.

[0226] It can be understood that the power offset is a logarithmic value, and the power offset can be the difference or sum between the transmission power ratio and the preconfigured transmission power ratio. Or, the power offset is a linear value, and the power offset is the ratio or product between the transmission power ratio and the preconfigured transmission power ratio.

[0227] It should be understood that the above power offset being the difference or ratio between the transmission power ratio and the preconfigured transmission power ratio also applies to the case where the number of DMRS CDM groups without data is equal to 1. In other words, the transmission power ratio between the above-mentioned data signal and the DMRS can include two parts: the power offset (i.e., the transmission power ratio between the data signal and the first channel), and the preconfigured transmission power ratio.

[0228] It can be understood that considering that the transmission power ratio between the data signal and the DMRS is equal to the EPRE ratio between the data signal and the DMRS, then the power offset can be a partial ratio in the EPRE ratio between the data signal and the DMRS.

[0229] For example, as shown in Table 6, the above-mentioned EPRE ratio between the data signal and the DMRS = the EPRE ratio between the PDSCH and the DMRS + the power offset ΔTh. Among them, the power offset ΔTh can be a logarithmic value. It can be understood that Table 6 corresponds to Table 2.

[0230] Table 6

[0231]

[0232] In a possible implementation, under each DMRS configuration type, the number of different DMRS CDM groups without data can correspond to the same power offset ΔTh. That is to say, for different DMRS configuration types and the number of DMRS CDM groups without data, the same power offset can be corresponded, thereby reducing the complexity of power offset configuration.

[0233] For example, as shown in Table 7, the number of different DMRS CDM groups without data can correspond to the same power offset (-3 dB), and different DMRS configuration types can correspond to the same power offset (-3 dB).

[0234] Table 7

[0235]

[0236] For another example, as shown in Table 8, different DMRS configuration types can correspond to different power offsets.

[0237] Table 8

[0238]

[0239] In another possible implementation, under each DMRS configuration type, the number of different DMRS CDM groups without data can correspond to different power offsets ΔTh. For example, as shown in Table 9, the number of different DMRS CDM groups without data can correspond to different power offsets, and the power offsets corresponding to different DMRS configuration types are the same. It can be understood that the power offsets corresponding to different DMRS configuration types can also be different, and the embodiments of the present application do not make specific limitations on this.

[0240] Table 9

[0241]

[0242] It should be understood that as described in the relevant description of "downward clipping" above, the specific value of the power offset can be related to the clipping threshold, and thus different clipping thresholds can correspond to different power offsets, thereby improving the flexibility of configuring the power offset.

[0243] It can be understood that the EPRE ratio corresponding to PUSCH is similar to the EPRE ratio corresponding to PDSCH, which will not be elaborated here.

[0244] Hereinafter, an example will be given with the reference signal being PTRS for illustration.

[0245] It can be understood that for the scenario where precoding is not enabled for uplink transmission, the transmission power ratio between the first channel and the PTRS can be based on the transmission power ratio between the PUSCH and the PTRS per layer per RE. In other words, the power offset, which is the transmission power ratio between the data signal and the reference signal, or the EPRE ratio between the data signal and the reference signal, can be replaced with: the power offset is the transmission power ratio per layer per RE between the data signal and the PTRS.

[0246] Similarly, the power offset, which is the ratio between the transmission power ratio and the preconfigured transmission power ratio, can be replaced with: the power offset is the ratio between the transmission power ratio per layer per RE and the preconfigured transmission power ratio, and the preconfigured transmission power ratio is the transmission power ratio per layer per RE between the first channel and the PTRS.

[0247] For example, for the power offset which is the ratio between the transmission power ratio per layer per RE and the preconfigured transmission power ratio, in Table 3 mentioned above, the number of layers of the PUSCH and in the case of full coherence, the preconfigured transmission power ratio is 3 dB, that is, the transmission power of the first channel / the transmission power of the PTRS = 2, and the transmission power ratio between the data signal and the DMRS is: the transmission power of the data signal / the transmission power of the PTRS = 1 / 2 (i.e., 0.5). Furthermore, the power offset can be determined as the ratio between 1 / 2 and 2, which is 1 / 4, that is, the transmission power ratio between the data signal and the first channel is 1 / 4.

[0248] It can be understood that considering that the transmission power ratio between the data signal and the PTRS is equal to the transmission power ratio per layer per RE between the data signal and the PTRS, the power offset can be a partial ratio in the transmission power ratio per layer per RE between the data signal and the PTRS.

[0249] For example, as shown in Table 10, the above-mentioned transmission power ratio per layer per RE between the data signal and the PTRS = the transmission power ratio per layer per RE between the PUSCH and the PTRS + the power offset ΔTh. Among them, the power offset ΔTh can be a logarithmic value. It can be understood that Table 10 corresponds to Table 3.

[0250] Table 10

[0251]

[0252] It should be understood that similar to Tables 7 - 9 mentioned above, for different numbers of layers and / or transmission situations (such as whether it is coherent transmission, or partial coherent transmission, or transmission based on a codebook, etc.), the value of the power offset ΔTh can be the same or different, and the embodiments of the present application do not make specific limitations on this.

[0253] It can be understood that for the uplink transmission enabled precoding scenario, the transmission power ratio between the first channel and the PTRS can be determined according to the scaling factor β', that is, the scaling factor β' = transmission power of the PTRS / transmission power of the first channel. In other words, the power offset is the ratio between the transmission power ratio and the preconfigured transmission power ratio, and can be replaced with: the power offset is the ratio between the transmission power ratio and the preconfigured scaling factor β'.

[0254] It can be understood that the power offset can be a partial ratio in the transmission power ratio between the data signal and the PTRS.

[0255] For example, as shown in Table 11, the above-mentioned transmission power ratio between the data signal and the PTRS = the transmission power ratio between the PUSCH and the PTRS (i.e., the preconfigured scaling factor β') + the power offset ΔTh. Among them, the power offset ΔTh can be a logarithmic value. It can be understood that Table 11 corresponds to Table 4.

[0256] Table 11

[0257]

[0258] It should be understood that similar to the foregoing Tables 7 to 9, for different modulation schemes and / or modulation orders, the values of the power offset ΔTh can be the same or different, and the embodiments of the present application do not make specific limitations thereon.

[0259] It can be understood that for the downlink transmission scenario, the transmission power ratio between the first channel and the PTRS can be determined according to the EPRE ratio ρ per layer per RE between the PTRS and the PDSCH PTRS Determined. In other words, the power offset is the transmission power ratio between the data signal and the reference signal, or the power offset is the EPRE ratio between the data signal and the reference signal, and can be replaced with: the power offset is the EPRE ratio per layer per RE between the data signal and the PTRS.

[0260] Similarly, the power offset is the ratio between the transmission power ratio and the preconfigured transmission power ratio, and can be replaced with: the power offset is the ratio between the EPRE ratio per layer per RE and the preconfigured transmission power ratio, and the preconfigured transmission power ratio is the EPRE ratio per layer per RE between the first channel and the PTRS.

[0261] For example, for the power offset which is the ratio between the EPRE ratio per layer per RE and the preconfigured transmission power ratio, in Table 5 above, when the number of layers of PDSCH is equal to 2, the preconfigured transmission power ratio is 3 dB, that is, the transmission power of the first channel / the transmission power of PTRS = 2, and the transmission power ratio between the data signal and DMRS is: the transmission power of the data signal / the transmission power of PTRS = 1 / 2 (i.e., 0.5). Furthermore, the power offset can be determined as the ratio between 1 / 2 and 2, which is 1 / 4, that is, the transmission power ratio between the data signal and the first channel is 1 / 4.

[0262] It can be understood that considering that the transmission power ratio between the data signal and PTRS is equal to the EPRE ratio per layer per RE between the data signal and PTRS, the power offset can be a partial ratio in the EPRE ratio between the data signal and DMRS.

[0263] For example, as shown in Table 12, the EPRE ratio per layer per RE between the above-mentioned data signal and PTRS = the EPRE ratio per layer per RE between PDSCH and PTRS + the power offset ΔTh. Among them, the power offset ΔTh can be a logarithmic value. It can be understood that Table 12 corresponds to Table 5.

[0264] Table 12

[0265]

[0266] It should be understood that similar to Tables 7 - 9 above, for different numbers of PDSCH layers, the value of the power offset ΔTh can be the same or different, and the embodiments of the present application do not make specific limitations on this.

[0267] It can be understood that based on Tables 6 - 12 above, the first device can determine the power difference between the reference signal and the data signal according to the power offset and the preconfigured transmission power ratio in the protocol. Furthermore, when the transmission power of the reference signal is determined, the first device can determine the power compensation value corresponding to the data signal according to the transmission power of the reference signal and the above-mentioned power difference to compensate for the interference introduced by the clipping process. Thus, the first device can determine the target transmission power of the first channel according to this power compensation value.

[0268] It can also be understood that for the second device receiving the data signal, the second device can determine the transmission power ratio between the data signal and the reference signal according to Tables 6 - 12 above. Furthermore, when the second device demodulates the data signal, the second device can determine the amplitude of the data signal according to the transmission power ratio between the data signal and the reference signal. Among them, for uplink transmission, the first device can be a terminal device, and the second device can be the aforementioned Figure 6The access network device in, or a module or unit of the access network device (such as a chip, chip system, chip circuit, or circuit, etc. of the access network device). For downlink transmission, the first device may be an access network device, and the second device may be the aforementioned Figure 6 The terminal device in, or a module or unit of the terminal device (such as a chip, chip system, chip circuit, or circuit, etc. of the terminal device).

[0269] Solution 2:

[0270] In a possible implementation, the power offset is the ratio of the transmission power between the data signal and the first channel; or, the power offset is the ratio between the actual amplitude of the modulation symbol and the amplitude of the constellation point corresponding to the modulation symbol, where the modulation symbol is the modulation symbol carried by the data signal; or, the power offset is the difference between the complex value corresponding to the modulation symbol and the complex value of the constellation point corresponding to the modulation symbol. For example, according to the relevant example in the aforementioned "clipping downwards", the transmission power of the first channel is 10 power units. After the data signal undergoes clipping downwards processing, the ratio of the transmission power between the data signal and the first channel is 7 / 10, that is, the power offset can be 7 / 10. Additionally, the power offset can be less than or equal to 1, or can be greater than 1. For example, in the case where the clipping process is the aforementioned "clipping downwards", the actual transmission power of the data signal will decrease, and thus the value range of the power offset is (0,1). Another example is that in the case of clipping upwards, the actual transmission power of the data signal can increase, and thus the value of the power offset can be greater than 1. Further, the value corresponding to the power offset ratio coefficient can be a quantization value. For example, the quantization value corresponding to 7 / 10 is 0.33.

[0271] It can be understood that the modulation scheme between the data signal and the first channel is correlated. For example, when the first device is a terminal device, the network side can configure the modulation scheme of the first channel for the first device. Then, the first device can use this modulation scheme to adjust and clip the data, and thus generate a data signal.

[0272] That is to say, the power offset can be the ratio of the transmission power between the data signal and the first channel, or can be the amplitude ratio or complex value difference between the modulation symbol carried by the data signal and the constellation point corresponding to the modulation symbol. Then, the first device can flexibly determine the power offset to be applicable to different scenarios.

[0273] For example, in an uplink transmission scenario, by defining the power offset as the ratio of the transmission power between the data signal and the first channel, the target transmission power of the first channel can be determined through the power control parameter of the first channel, thereby achieving power control of the first channel. Another example is that by defining the power offset as the amplitude ratio or complex value difference between the modulation symbol carried by the data signal and the constellation point corresponding to the modulation symbol, the target transmission power of the first channel can be determined through the MCS scheduled by DCI, thereby achieving power control of the first channel.

[0274] It can be understood that the power offset can also be the constellation vector between the constellation point corresponding to the modulation symbol before clipping processing and the constellation point corresponding to the modulation symbol after clipping processing. Alternatively, the power offset can also be the Euclidean distance between the constellation point corresponding to the modulation symbol before clipping processing and the constellation point corresponding to the modulation symbol after clipping processing. Alternatively, the power offset can also be the ratio between the Euclidean distance value of the modulation symbol relative to the origin in the constellation diagram before clipping processing and the actual Euclidean distance value corresponding to the modulation symbol after clipping processing.

[0275] It should be understood that in downlink transmission, the power control of the first device is implemented based on the EPRE of the reference signal. Furthermore, the first device can determine the transmission power of the first channel according to the EPRE of the reference signal and the preconfigured transmission power ratio in the above Solution 1, and adjust the transmission power of the first channel according to the power offset in Solution 2, thereby obtaining the target transmission power of the first channel.

[0276] It can be understood that in uplink transmission, the first device can determine the target transmission power of the first channel based on the power control parameter and power offset of the first channel.

[0277] It should be understood that for determining the target transmission power of the first channel based on the power control parameter and power offset of the first channel, the power offset can be indicated by the second device. For example, the first device is a terminal device and the second device is an access network device.

[0278] In a possible implementation, the target transmission power is determined according to the power offset and the power control parameter of the first channel. Among them, the power control parameter of the first channel includes at least one of the following: the maximum transmission power of the terminal device, the open-loop power control parameter, the closed-loop power control parameter, or the MCS. The open-loop power control parameter is used to determine the open-loop power of the first channel. The closed-loop power control parameter is used to determine the closed-loop power adjustment value of the first channel. The MCS is used to determine the MCS power adjustment amount. For example, the first device determines the target transmission power of the first channel according to the power offset (i.e., step S703), including: the first device determines the target transmission power of the first channel according to the power offset and the power control parameter of the first channel.

[0279] That is to say, the first device can determine the target transmission power of the first channel according to the uplink power control parameter and the power offset, so that the change in the uplink power control mode of the system is small, the compatibility is good, and the implementation complexity can be reduced.

[0280] It can be understood that the power control parameter of the first channel can refer to the foregoing formula (2). For example, the open-loop power control parameter can include the index j of the parameter set configured by the high-layer signaling, and the path loss reference signal resource index q d . The closed-loop power control parameter can include the index l of the closed-loop power control state.

[0281] In a possible implementation manner, the transmission power ratio between the data signal and the first channel includes any one of the following: the ratio between the transmission power of the data signal and the open-loop power of the first channel; the ratio between the transmission power of the data signal and the closed-loop power adjustment value of the first channel; the ratio between the transmission power of the data signal and the MCS power adjustment amount of the first channel; or, the ratio between the transmission power of the data signal and the maximum transmission power of the terminal device corresponding to the first channel. That is to say, the transmission power ratio between the data signal and the first channel can include various corresponding power adjustment amounts in the uplink power control. Furthermore, the first device can adopt multiple different ways to adjust the uplink power control, so as to further support the first device to flexibly determine the target transmission power of the first channel.

[0282] Next, based on Methods 1 to 4, the adjustment methods of the above uplink power control will be described in detail respectively.

[0283] Method 1: Adjust the open-loop power

[0284] In a possible implementation manner, the open-loop power includes the target receiving power and / or the path loss compensation power. Among them, the ratio between the transmission power of the data signal and the open-loop power of the first channel includes: the ratio between the transmission power of the data signal and the target receiving power, or the ratio between the transmission power of the data signal and the path loss compensation power. It can be understood that the power offset can include: the ratio between the transmission power of the data signal and the target receiving power, and / or the ratio between the transmission power of the data signal and the path loss compensation power. Furthermore, the power offset is used to adjust the open-loop power. Further, the open-loop power is configured by the network side and can be continuously effective during the RRC connection. That is to say, for the power offset being the ratio between the transmission power of the data signal and the open-loop power, the power offset can be continuously effective during the RRC connection, so that the first device can determine the target transmission power of the first channel according to the power offset during the RRC connection, thereby saving network overhead.

[0285] In a possible implementation, the target receiving power includes a common target receiving power and a dedicated target receiving power of the terminal device. The ratio between the transmission power of the data signal and the target receiving power includes: the ratio between the transmission power of the data signal and the common target receiving power, or the ratio between the transmission power of the data signal and the dedicated target receiving power. That is to say, for the power offset which is the ratio between the transmission power of the data signal and the common target receiving power, this power offset can correspond to multiple terminal devices within the cell, thereby further saving network overhead. For the power offset which is the ratio between the transmission power of the data signal and the dedicated target receiving power of the terminal device, this power offset can be configured for a specific terminal device within the cell, thereby increasing the flexibility of configuring the power offset.

[0286] In a possible implementation, the target transmission power is determined based on the adjusted open-loop power and at least one of the following: the closed-loop power adjustment value, the MCS power adjustment amount, and the maximum transmission power of the terminal device. The adjusted open-loop power is obtained by adjusting the open-loop power according to the power offset. That is to say, by adjusting the open-loop power in the uplink power control, the first device can determine the target transmission power of the first channel, which can further reduce the modification to the uplink power control and improve compatibility.

[0287] For example, when the first device determines the target transmission power of the first channel according to the power offset and the power control parameters of the first channel, it may include: the first device determines the adjusted open-loop power according to the power offset and the open-loop power; the first device determines the target transmission power according to the adjusted open-loop power and at least one of the following: the closed-loop power adjustment value, the MCS power adjustment amount, and the maximum transmission power of the terminal device.

[0288] Exemplarily, taking the first channel PUSCH as an example, the adjusted open-loop power P’ b,f,c (j,q d ) can be determined by formula (5).

[0289] P’ b,f,c (j,q d ) = P O_PUSCH,b,f,c (j) + α b,f,c (j)·PL b,f,c (q d ) + ΔTh Formula (5)

[0290] Wherein, P’ b,f,c (j,q d ) represents the adjusted open-loop power, P O_PUSCH,b,f,c (j) represents the target receiving power, α b,f,c (j)•PL b,f,c (qd ) represents the path loss compensation power, and ΔTh represents the power offset. Among them, P O_PUSCH,b,f,c (j), α b,f,c (j), and PL b,f,c (q d ) can specifically refer to the relevant description of the foregoing formula (2), which will not be elaborated here.

[0291] It can be understood that for the power offset which is the ratio of the transmission power between the data signal and the first channel. For example, the power offset = the transmission power of the first channel / the transmission power of the data signal = 4, and then the corresponding logarithmic value of the power frequency shift amount is 6 dB. It can be understood that for the power offset being a linear value, formula (5) can be transformed into

[0292] For the power offset = the transmission power of the data signal / the transmission power of the first channel = 1 / 4 (i.e., -6 dB), in the case where the power offset is a linear value, ΔTh can be expressed as the reciprocal of the power offset; or, in the case where the power offset is a logarithmic value, ΔTh can be expressed as the negative of the power offset ((-6 dB)).

[0293] It should be understood that in the above example, the transmission power of the data signal is less than the transmission power of the first channel, and thus the adjusted open-loop power is greater than the open-loop power before adjustment. In actual implementation, the transmission power of the data signal after amplitude limiting processing can also be greater than the transmission power of the first channel, and thus the modulated open-loop power is less than the open-loop power before adjustment.

[0294] For example, the power offset = the transmission power of the first channel / the transmission power of the data signal = 4, and then the corresponding logarithmic value of the power frequency shift amount is 6 dB, that is, P’ b,f,c (j,q d ) = P O_PUSCH,b,f,c (j) + α b,f,c (j) • PL b,f,c (q d ) - 6 dB.

[0295] It can be understood that for the ratio between the transmission power of the data signal and the target receiving power, including: the ratio between the transmission power of the data signal and the common target receiving power, or the ratio between the transmission power of the data signal and the dedicated target receiving power, the adjusted open-loop power includes the adjusted target receiving power and the path loss compensation power, that is, P’ O_PUSCH,b,f,c (j) = P’ O_PUSCH,b,f,c (j) + α b,f,c (j) · P Lb,f,c (q d ), P’ O_PUSCH,b,f,c (j) is the adjusted target receiving power, P’O_PUSCH,b,f,c (j) can be determined by Equation (6).

[0296] P’ O_PUSCH,b,f,c (j) = P O_NOMINAL_PUSCH,f,c (j) + P O_UE_PUSCH,b,f,c (j) + ΔTh Equation (6)

[0297] Wherein, P O_NOMINAL_PUSCH,f,c (j) represents the common target receiving power, P O_UE_PUSCH,b,f,c (j) represents the dedicated target receiving power of the terminal device, and ΔTh represents the power offset.

[0298] It should be understood that for each parameter b, f, and c carried in the above Equation (5), Equation (6), and the foregoing Equation (2), it means that each parameter is the parameter value corresponding to the activated BWP b of the carrier f in the serving cell c. This is uniformly explained here and will not be elaborated below.

[0299] It can be understood that when the second device does not perform closed-loop power adjustment on the first device, K s = 0 (that is, the high-layer parameter configuration turns off the function of power adjustment according to MCS), and the maximum transmission power of the terminal device can be ignored, the first device can determine the target transmission power of the first channel according to the adjusted open-loop power. Among them, the situation where the maximum transmission power of the terminal device can be ignored may include: the power level of the terminal device is relatively high, no power back-off is expected, the maximum transmission power of the terminal device is greater than the adjusted open-loop power, or the adjusted open-loop power decreases, etc. The embodiments of the present application do not make specific limitations on this.

[0300] For example, taking the first channel as PUSCH, the target transmission power of the first channel Wherein, μ represents the subcarrier spacing of the first channel, represents the number of RBs occupied by the first channel, P’ b,f,c (j, q d ) represents the adjusted open-loop power, P’ b,f,c (j, q d ) can be determined according to Equation (5) or Equation (6).

[0301] It can also be understood that when the second device performs closed-loop power adjustment on the first device, K s = 0, and the maximum transmission power of the terminal device can be ignored, the first device can determine the target transmission power of the first channel according to the adjusted open-loop power and the closed-loop power adjustment value.

[0302] Or, when the second device does not perform closed-loop power adjustment on the first device, K sWhen it is not equal to 0 and the maximum transmission power of the terminal device can be ignored, the first device can determine the target transmission power of the first channel according to the adjusted open-loop power and the MCS power adjustment amount.

[0303] Alternatively, when the second device does not perform closed-loop power adjustment on the first device and K s = 0, the first device can determine the target transmission power of the first channel according to the adjusted open-loop power and the maximum transmission power of the terminal device. For example, taking the first channel as PUSCH, the target transmission power P' PUSCH,b,f,c (i,j,q d ,l) can be determined according to formula (7).

[0304]

[0305] Among them, the various parameters in formula (7) can refer to the relevant descriptions of the above formula (5), formula (6), and formula (2), and will not be elaborated here.

[0306] Similarly, in different situations, the first device can determine the target transmission power of the first channel according to the adjusted open-loop power and at least two of the following: the closed-loop power adjustment value, the MCS power adjustment amount, and the maximum transmission power of the terminal device.

[0307] Exemplarily, taking the first channel as PUSCH, the target transmission power P' PUSCH,b,f,c (i,j,q d ,l) can be determined according to formula (8).

[0308]

[0309] Among them, the various parameters in formula (8) can refer to the relevant descriptions of the above formula (5), formula (6), and formula (2), and will not be elaborated here.

[0310] It can be understood that the above formulas are only examples. In some scenarios, such as in the carrier aggregation (CA) and dual connectivity (DC) scenarios, the b, f, and c carried by the various parameters in the above formulas can be changed or hidden, and the embodiments of the present application do not make specific limitations on this.

[0311] Method 2: Adjust the closed-loop power adjustment value

[0312] It can be understood that the transmission power ratio between the data signal and the first channel is: the ratio between the transmission power of the data signal and the closed-loop power adjustment value of the first channel. The power offset can be the ratio between the transmission power of the data signal and the closed-loop power adjustment value of the first channel. Furthermore, the power offset is used to adjust the closed-loop power adjustment value of the first channel. Further, the closed-loop power adjustment value is configured by the network side through transmit power control (TPC) signaling. That is to say, for the power offset being the ratio between the transmission power of the data signal and the closed-loop power adjustment value, the power offset can be used to quickly and dynamically adjust the transmission power of the first channel to be applicable to scenarios with rapid channel changes, adaptation to cell interference, and rapid service changes.

[0313] In a possible implementation, the target transmission power is determined based on the adjusted closed-loop power adjustment value and at least one of the following: open-loop power, MCS power adjustment amount, and the maximum transmission power of the terminal device. The adjusted closed-loop power adjustment value is obtained by adjusting the closed-loop power adjustment value according to the power offset. That is to say, by adjusting the closed-loop power adjustment value in the uplink power control, the first device can determine the target transmission power of the first channel, which can further reduce the modification to the uplink power control and improve compatibility.

[0314] For example, when the first device determines the target transmission power of the first channel according to the power offset and the power control parameters of the first channel, it can include: the first device determines the adjusted closed-loop power adjustment value according to the power offset and the closed-loop power adjustment value; the first device determines the target transmission power according to the adjusted closed-loop power adjustment value. Or, the first device determines the target transmission power according to the adjusted closed-loop power adjustment value and at least one of the following: open-loop power, MCS power adjustment amount, and the maximum transmission power of the terminal device.

[0315] Exemplarily, taking the first channel PUSCH as an example, the adjusted closed-loop power adjustment value can be determined by formula (9).

[0316] f′ b,f,c (i,l) = f b,f,c (i,l) + ΔTh Formula (9)

[0317] Wherein, f′ b,f,c (i,l) represents the adjusted closed-loop power adjustment value, f b,f,c(i, l) represents the closed-loop power adjustment value, and ΔTh represents the power offset. It can be understood that ΔTh in formula (9) is similar to ΔTh in formula (5). For example, the power offset = the transmission power of the first channel / the transmission power of the data signal = 4, and then the logarithm value corresponding to the power frequency shift amount is 6 dB. It can be understood that for a linear power offset value, formula (9) can be transformed into f′ b,f,c (i, l) = f b,f,c (i, l)) * ΔTh.

[0318] It can be understood that when K s = 0, and the maximum transmission power of the terminal device can be ignored, the first device can determine the target transmission power of the first channel according to the adjusted closed-loop power adjustment value and the open-loop power; or, when K s is not equal to 0, and the maximum transmission power of the terminal device can be ignored, the first device can determine the target transmission power of the first channel according to the adjusted closed-loop power adjustment value, the open-loop power, and the MCS power adjustment amount; or, the first device can determine the target transmission power of the first channel according to the adjusted closed-loop power adjustment value, the open-loop power, the MCS power adjustment amount, and the maximum transmission power of the terminal device.

[0319] Exemplarily, taking the first channel as PUSCH, the target transmission power P′ PUSCH,b,f,c (i, j, q d , l) can be determined according to formula (10).

[0320]

[0321] Among them, f′ b,f,c (i, l) in formula (10) can refer to the above formula (9), and other parameters in formula (10) can refer to the relevant descriptions of the foregoing formula (2), which will not be elaborated here.

[0322] It should be understood that the above formulas (9) and (10) are only examples, and other methods can also be used to determine the adjusted closed-loop power adjustment value and the target transmission power. The embodiments of the present application do not make specific limitations in this regard.

[0323] Method 3: Adjust the MCS power adjustment amount

[0324] In a possible implementation, the ratio between the transmission power of the data signal and the MCS power adjustment amount is used to adjust the BPRE. It can be understood that the MCS power adjustment amount and the closed-loop power adjustment value have a similar effect. The difference is that the second device dynamically schedules the MCS of the first device to change the transmit power spectral density of the first device, achieving an effect similar to fast power control. That is to say, the first device can adjust the BPRE through the power offset amount to achieve fast and dynamic adjustment of the transmission power of the first channel. For example, the first device can send a scheduling request (SR) or a buffer state report (BSR) to the second device, and the second device can determine the MCS and power offset amount for scheduling the first device based on the SR or BSR from the first device. Then, the first device can adjust the transmission power of the first channel according to the scheduled MCS and power offset amount.

[0325] It can be understood that the ratio between the transmission power of the data signal and the MCS power adjustment amount for adjusting the BPRE may mean that the power offset amount can be used as a proportionality coefficient of the BPRE. For example, the adjusted BPRE' can be determined according to formula (11).

[0326]

[0327] Where ΔTh is the power offset amount, and the other parameters in formula (11) can refer to the descriptions of the relevant parameters in formula (2), which will not be elaborated here.

[0328] It can be understood that considering that BPRE is the sum of the ratios between K r and N RE the power offset amount ΔTh can be a linear value.

[0329] In a possible implementation, the target transmit power is determined based on the adjusted MCS power adjustment amount and at least one of the following: open-loop power, closed-loop power adjustment value, and the maximum transmit power of the terminal device. The adjusted MCS power adjustment amount is obtained by adjusting the MCS power adjustment amount according to the power offset amount. That is to say, the first device can determine the target transmit power of the first channel by adjusting the BPRE in the uplink power control, which can further reduce the modification to the uplink power control and improve compatibility.

[0330] For example, for the first device to determine the target transmission power of the first channel according to the power offset and the power control parameter of the first channel, it may include: the first device determines the adjusted MCS power adjustment amount according to the power offset and the BPRE; the first device determines the target transmission power according to the MCS power adjustment amount and at least one of the following: open-loop power, closed-loop power adjustment value, and the maximum transmission power of the terminal device.

[0331] Exemplarily, taking the first channel PUSCH as an example, the MCS power adjustment amount can be determined by formula (12).

[0332]

[0333] Among them, Δ′ TF,b,f,c (i) represents the adjusted MCS power adjustment amount, BPRE′ is the adjusted BPRE, and BPRE′ can refer to the relevant description of formula (11) above. Other parameters in formula (12) can refer to the relevant description of formula (2), which will not be elaborated here.

[0334] It can be understood that when K s is not equal to 0, the second device does not perform closed-loop power adjustment on the first device, and the maximum transmission power of the terminal device can be ignored, the first device can determine the target transmission power of the first channel according to the adjusted MCS power adjustment amount and the open-loop power; or, when K s is not equal to 0, and the maximum transmission power of the terminal device can be ignored, the first device can determine the target transmission power of the first channel according to the adjusted MCS power adjustment amount, open-loop power, and closed-loop power adjustment value. Or, the first device can determine the target transmission power of the first channel according to the modulated MCS power adjustment amount, open-loop power, closed-loop power adjustment value, and the maximum transmission power of the terminal device.

[0335] Exemplarily, taking the first channel as PUSCH as an example, the target transmission power P′ PUSCH,b,f,c (i,j,q d ,l) of the first channel can be determined by formula (13).

[0336]

[0337] Among them, Δ′ TF,b,f,c (i) in formula (13) can refer to formula (12) above, and other parameters in formula (11) can refer to the relevant description of formula (2) above, which will not be elaborated.

[0338] Method 4: Adjust the MPR

[0339] It can be understood that for the power offset which is the ratio between the transmission power of the data signal and the maximum transmission power of the terminal device, the power offset can be used to adjust the maximum transmission power of the terminal device, and can effectively determine the target transmission power of the first channel in the scenario of reducing the transmission power of the first channel. For example, when the transmission power of the data signal is greater than the transmission power of the first channel, by reducing the transmission power of the first channel, the offset of the modulation symbols carried by the data signal on the constellation diagram due to clipping processing can be reduced. Furthermore, in uplink power control (see formula (2)), compared with reducing the open-loop power, the closed-loop power adjustment value, and the MCS power adjustment amount, etc., by reducing the maximum transmission power of the terminal device, the transmission power of the first channel can be directly and effectively reduced.

[0340] In a possible implementation manner, the ratio between the transmission power of the data signal and the maximum transmission power of the terminal device includes: the ratio or difference between the MPR value and the pre-configured MPR value. That is to say, for the power offset which is the ratio or difference between the MPR value and the pre-configured MPR value, the power offset can adjust the maximum transmission power of the terminal device through the MPR value, with little change to the uplink power control, good system compatibility, and can enable the first device to effectively determine the target transmission power of the first channel in the scenario of reducing the transmission power of the first channel.

[0341] It can be understood that the MPR value refers to the actual MPR value of the first device, and the pre-configured MPR value can be referred to in Table 1 mentioned above. Among them, for the MPR value and the pre-configured MPR value being logarithmic values, the power offset can be a logarithmic value, that is, the power offset is the difference between the MPR value and the pre-configured MPR value. For example, MPR value = pre-configured MPR value + ΔTh. For the MPR value and the pre-configured MPR value being linear values, the power offset can be a linear value, that is, the power offset is the ratio between the MPR value and the pre-configured MPR value.

[0342] For example, the relationship among the MPR value, the pre-configured MPR value, and the power offset ΔTh can be referred to in Table 13. As shown in Table 13, MPR value = pre-configured MPR value + ΔTh. Among them, the data signal can be a signal processed by DFT-s-OFDM, that is, the first channel enables precoding; or, the data signal can also be a signal processed by CP-OFDM, that is, the first channel does not enable precoding.

[0343] Table 13

[0344]

[0345] It should be understood that Table 13 is only an example. For different RB configurations and / or modulation schemes, the value of the power offset ΔTh can be the same or different, and the embodiments of the present application do not make specific limitations thereto.

[0346] In a possible implementation, the target transmit power is determined based on the adjusted maximum transmit power of the terminal device and at least one of the following: open-loop power, closed-loop power adjustment value, and MCS power adjustment amount. The adjusted maximum transmit power of the terminal device is obtained by adjusting the maximum transmit power of the terminal device according to the power offset. That is, the first device can adjust the maximum transmit power of the terminal device in the uplink power control through MPR, and then determine the target transmit power of the first channel, which can further reduce the modification to the uplink power control and improve compatibility.

[0347] For example, the first device determines the target transmit power of the first channel according to the power offset and the power control parameters of the first channel, which may include: the first device determines the adjusted maximum transmit power of the terminal device according to the power offset and the maximum transmit power of the terminal device; the first device determines the target transmit power according to the adjusted maximum transmit power of the terminal device. Alternatively, the first device determines the target transmit power according to the adjusted maximum transmit power of the terminal device and at least one of the following: open-loop power, closed-loop power adjustment value, and MCS power adjustment amount.

[0348] It can be understood that for the scenario of power back-off and reducing the transmit power of the first channel, the adjusted maximum transmit power of the terminal device can be used as the target transmit power. In this way, the first device can determine the target transmit power according to the adjusted maximum transmit power of the terminal device.

[0349] It can also be understood that when the second device does not perform closed-loop power control on the first device and K s = 0, the first device can determine the target transmit power according to the adjusted maximum transmit power of the terminal device and the open-loop power. Alternatively, when the second device performs closed-loop power control on the first device and K s = 0, the first device can determine the target transmit power according to the adjusted maximum transmit power of the terminal device, the open-loop power, and the closed-loop power adjustment value. Alternatively, when the second device does not perform closed-loop power control on the first device and K s is not equal to 0, the first device can determine the target transmit power according to the adjusted maximum transmit power of the terminal device, the open-loop power, and the MCS power adjustment amount. Alternatively, when the second device performs closed-loop power control on the first device and K s is not equal to 0, the first device can determine the target transmit power according to the adjusted maximum transmit power of the terminal device, the open-loop power, and the MCS power adjustment amount.

[0350] Exemplarily, taking the first channel as PUSCH, the target transmit power P' of the first channel PUSCH,b,f,c(i,j,q d ,l) can be determined according to formula (14).

[0351]

[0352] Among them, (P CMAX,f,c (i) - MPR) in formula (14) represents the maximum transmit power of the adjusted terminal device. The value of MPR can be referred to in Table 13. Other parameters in formula (14) can be referred to in formula (2) and will not be elaborated here.

[0353] It should be understood that the above methods 1 to 4 can be implemented separately, or at least two of the above methods 1 to 4 can be combined with each other. The embodiments of the present application do not make specific limitations on this.

[0354] It can be understood that in addition to the clipping threshold, the power offset can also be related to other transmission parameters corresponding to the data signal, such as the modulation order used to transmit the data signal. The correlation between the power offset and the transmission parameters used to transmit the data signal will be specifically introduced below.

[0355] In a possible implementation manner, the power offset can be associated with the transmission parameters used to transmit the data signal. Among them, the transmission parameters include one or more of the following: the MCS used to transmit the data signal, the constellation diagram used to transmit the data signal, the modulation order used to transmit the data signal, or the clipping threshold used to perform clipping processing on the data signal.

[0356] In a possible implementation manner, there is an inverse proportional relationship between the power offset and the clipping threshold.

[0357] It can be understood that as described in the relevant description of "downward clipping" above, in the downward clipping process, the larger the clipping threshold, the larger the modulus value of the introduced interference symbol. Furthermore, in the transmit power of the first channel, the proportion of the interference signal corresponding to the interference symbol is larger, so that the actual transmit power of the data signal is smaller, that is, the ratio of the transmit power between the data signal and the first channel is smaller, that is, the power offset is smaller.

[0358] It can also be understood that the smaller the clipping threshold, the smaller the modulus value of the introduced interference symbol, and thus the actual transmit power of the data signal is close to the transmit power of the first channel, that is, the power offset is larger.

[0359] Furthermore, the larger the clipping threshold, the smaller the fluctuation of the frequency-domain waveform after clipping processing, and the smaller the impact on the sensing performance.

[0360] In a possible implementation manner, the power offset is determined according to the clipping threshold.

[0361] It can be understood that, as described in the relevant content of "downward clipping" above, in the downward clipping process, combined with Figure 3 the constellation diagram shown, the modulus value corresponding to the interference symbol introduced can be determined according to the clipping threshold, and the proportion of the transmission power occupied by the interference symbol in the transmission power of the first channel can be determined. Furthermore, the reduction ratio of the transmission power of the data signal can be determined according to this occupied proportion, that is, the transmission power ratio between the data signal and the first channel, which is also the power offset.

[0362] In a possible implementation manner, when the modulation order is less than or equal to the first threshold, the power offset is 1. It can be understood that a power offset of 1 means that the transmission power between the data signal and the first channel is the same, that is, no interference symbol is introduced during the clipping process. It can also be understood that if the modulus values of the modulation symbols are all greater than the clipping threshold, it means that the modulation symbols will not be amplified in modulus, and thus no interference symbol is introduced during the clipping process.

[0363] Furthermore, when the modulation order is small, the amplitude of the frequency-domain waveforms corresponding to different subcarriers in the frequency domain is similar, that is, the fluctuation of the frequency-domain waveforms is small. Furthermore, all the subcarriers occupied by the data signal satisfy the condition in formula (4) in the "downward clipping" above, that is, the modulus value |X(n)| of the modulation symbol is greater than or equal to the clipping threshold Th, so that the modulation symbol will not be amplified.

[0364] For example, when the modulation order is 1, there are only 2 constellation points in the constellation diagram, and the Euclidean distance values corresponding to these two constellation points are the same, that is, the modulus values corresponding to different modulation symbols are the same, which means that there is no fluctuation in the frequency-domain waveform. Another example is that when the modulation order is 3, there are only 8 constellation points in the constellation diagram, and the Euclidean distance values corresponding to each constellation point are relatively close, so the fluctuation in the frequency-domain waveform is small.

[0365] It can be understood that the first threshold can be 1, 2, 3, or 4, etc., and the embodiments of the present application do not make specific limitations on this.

[0366] It can also be understood that the first device can determine the first threshold according to the sensing requirement or indication.

[0367] It should be understood that when the modulation order is less than or equal to the first threshold, the first device can set the clipping threshold to be less than or equal to the normalized ratio value corresponding to the modulation symbol with the smallest modulus value. Among them, the normalized ratio value can be the normalized factor or the normalized modulus value or the ratio value of the normalized Euclidean distance value described in the "downward clipping" above.

[0368] For example, in the case where the modulation order is 3, for 8-QAM, the modulation symbol with the smallest modulus value is the modulation symbol located on the I-axis or the Q-axis. Thus, the clipping threshold can be set to the normalized ratio value corresponding to the modulation symbol located on the I-axis or the Q-axis. It can be understood that the above clipping threshold can also be set to a smaller normalized ratio value, such as 0.1, 0.05, or 0.01, etc. The embodiments of the present application do not make specific limitations on this.

[0369] It can be understood that for the downward clipping represented by the foregoing formula (4), there is an inverse proportional relationship between the clipping threshold and the power offset, that is, the larger the clipping threshold, the greater the transmission power occupied by the introduced interference signal, and the greater the reduction ratio of the actual transmission power of the data signal. Thus, the coordinate point corresponding to the modulation symbol on the constellation diagram deviates more from its actual corresponding constellation point. However, for different modulation orders, the tolerance for the above offset is different. For example, the larger the modulation order, the lower the tolerance for the above offset; the smaller the modulation order, the higher the tolerance for the above offset. The reason is that for data signals with a larger modulation order, a higher signal to interference plus noise ratio (SINR) is required to demodulate normally. If the clipping threshold is too large, that is, the interference signal power is high, it will cause a large demodulation loss. For data signals with a smaller modulation order, they can be demodulated normally even when the SINR is low.

[0370] That is to say, the smaller the modulation order, the higher the tolerance for the interference introduced by the clipping process. Thus, the clipping threshold can be appropriately increased, thereby reducing the impact on the sensing performance.

[0371] In a possible implementation manner, there is an inverse proportional relationship between the modulation order and the clipping threshold. In other words, the larger the modulation order, the smaller the clipping threshold; the smaller the modulation order, the larger the clipping threshold. For example, in the case where the modulation order is 6, that is, 64-QAM, the clipping threshold can be 0.2. Thus, the modulation symbols whose corresponding modulus values are less than 0.2 need to have their modulus values amplified; in the case where the modulation order is 4, that is, 16-QAM, the clipping threshold can be 0.7. Thus, all modulation symbols whose corresponding modulus values are less than 0.7 need to have their modulus values amplified.

[0372] In a possible implementation manner, there is a direct proportional relationship between the power offset and the modulation order. That is to say, the larger the modulation order, the larger the power offset; the smaller the modulation order, the smaller the power offset.

[0373] In a possible implementation, there is an inverse proportional relationship between the target code rate and the clipping threshold. In other words, the higher the target code rate, the smaller the clipping threshold; the lower the target code rate, the larger the clipping threshold. It can be understood that similar to the modulation order, the lower the target code rate, the higher the tolerance for interference introduced by the clipping process; the higher the target code rate, the lower the tolerance for interference introduced by the clipping process.

[0374] In a possible implementation, there is a direct proportional relationship between the power offset and the target code rate. That is to say, the higher the target code rate, the larger the power offset; the lower the target code rate, the smaller the power offset.

[0375] It can be understood that the MCS includes the modulation order and the target code rate. The MCS index has a direct proportional relationship with the modulation order, and there is generally a direct proportional relationship between the MCS index and the target code rate. Furthermore, there is also a corresponding relationship between the MCS and the clipping threshold.

[0376] For example, there is an inverse proportional relationship between the MCS and the clipping threshold. Among them, the larger the MCS index, the smaller the clipping threshold; the smaller the MCS index, the larger the clipping threshold.

[0377] In a possible implementation, there is a direct proportional relationship between the power offset and the MCS. That is to say, the larger the MCS index, the larger the power offset; the smaller the MCS index, the smaller the power offset.

[0378] Next, in combination with the above-mentioned correlation between the transmission parameters and the power offset, the specific value of the power offset will be exemplarily described.

[0379] It should be understood that in the embodiments of the present application, the specific value of the power offset can be one or more elements in one or more sets. The one or more sets can be pre-configured by the protocol, or negotiated in advance between the first device and the second device, or indicated by the second device. The embodiments of the present application do not make specific limitations on this.

[0380] For example, in the case where the power offset is a linear value, the value of the power offset can be one or more elements in the following different sets:

[0381] Set 1: 0, 0, 17, 0.2, 0.25, 0.33, 0.5, 0.75, 1.

[0382] Set 2: 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.

[0383] Set 3: 0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.

[0384] Set 4: 0, 0.2, 0.3, 0.4, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.

[0385] Among them, element 0 and element 1 in the above sets can be discarded. Element 1 can represent a power offset of 1, that is, the transmission power ratio between the data signal and the first channel is 1, that is, after the data signal is amplitude-limited, the transmission power of the data signal does not decrease. For specific details, reference can be made to the above relevant description about the power offset of 1, which will not be elaborated here.

[0386] Furthermore, element 0 can be a reserved value. When the power offset indication information is interacted between the first device and the second device, it can indicate other situations. For example, it can indicate that it is not expected that the receiving end uses the power offset for demodulation. Another example is that it can indicate that the data signal is not expected to be used for sensing but for information transmission.

[0387] It should be understood that in Set 1, from element 0.17 to element 0.75, it can represent that the transmission power ratio between the data signal and the first channel is 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, 3 / 4. That is to say, when the amplitude-limiting threshold is 0.25, the first device can select the above 6 gears as the power offset. Furthermore, when the modulation order is relatively low, the tolerance for the amplitude-limiting threshold is relatively high, and thus a larger amplitude-limiting threshold can be selected, that is, a smaller power offset is selected to reduce the fluctuation degree of the frequency-domain waveform, thereby reducing the impact on the sensing performance. For example, when the modulation order is 4, the first device can select one of the above gears 1 / 6, 1 / 5, 1 / 4, or 1 / 3 as the power offset. Of course, in order to balance the coverage requirement, the first device does not expect the actual transmission power of the data signal to have a relatively low proportion, and thus can select 1 / 4 or 1 / 3 as the power offset.

[0388] It can be understood that when the modulation order is relatively high, the tolerance for the amplitude-limiting threshold is relatively low, and thus a larger power offset needs to be selected. For example, 1 / 2 or 3 / 4 can be selected. Of course, in order to reduce the degree of impairment of the sensing performance, the first device does not expect the proportion of the actual transmission power of the data signal to be relatively high, and thus can select 1 / 2 as the power offset.

[0389] It can also be understood that the above-mentioned Set 2 to Set 4 can provide more gear options to meet the coverage requirements and perception requirements. Among them, the interval between different gears in Set 2 is 0.1, that is, the difference between adjacent power offsets is 0.1, which means that the first device can select the power offset in steps of 0.1. Similarly, the step size of Set 3 is 0.05, that is, Set 3 can provide more and finer gear options.

[0390] Furthermore, the difference between Set 4 and Sets 1 to 3 is that the difference between the power offsets in Set 4 is variable, and the larger the power offset, the smaller the step size. It can be understood that as described above, there can be a proportional relationship between the modulation order and the power offset. Furthermore, a higher modulation order, such as 64QAM, will require a higher power offset, and for the constellation points with a larger Euclidean distance in 64QAM (such as Figure 5 the outermost constellation points), they are more sensitive to the power offset. For example, Figure 5 the constellation points in (the black-filled dots) are scaled down proportionally (the unfilled dots), and the constellation points with a larger Euclidean distance value have a larger offset, which is more likely to cause misjudgment. Therefore, for data signals with a higher modulation order, Set 4 can provide gear options with a larger step size in the range of smaller power offsets, and Set 4 can provide more refined gear options in the range of larger power offsets.

[0391] It can be understood that the power offset can also be a logarithmic value. Among them, the unit of the logarithmic value can be dB. For example, 0dB corresponds to a ratio of 1, -3dB corresponds to a ratio of 1 / 2, and -4.77dB corresponds to a ratio of 1 / 3. This logarithmic value can be negative or positive, and the embodiments of the present application do not make specific limitations on this.

[0392] For example, the value of the power offset can be one or more elements in the following multiple sets:

[0393] Set 5: 0dB, -1dB, -2dB, -3dB, -4dB, -4.77dB, -5dB, -6dB, -7dB, -8dB, -8.45dB, -10dB, -30dB.

[0394] Set 6: 0dB, -0.5dB, -1dB, -1.5dB, -2dB, -2.5dB, -3dB, -3.5dB, -4.5dB, -4.77dB, -5dB, -5.5dB, -6dB, -6.5dB, -7dB, -7.5dB, -8dB, -8.45dB, -10dB, -30dB.

[0395] Set 7: 0 dB, 1 dB, 2 dB, 3 dB, 4 dB, 4.77 dB, 5 dB, 6 dB, 7 dB, 8 dB, 8.45 dB, 10 dB, 30 dB.

[0396] Set 8: 0 dB, 0.5 dB, 1 dB, 1.5 dB, 2 dB, 2.5 dB, 3 dB, 3.5 dB, 4.5 dB, 4.77 dB, 5 dB, 5.5 dB, 6 dB, 6.5 dB, 7 dB, 7.5 dB, 8 dB, 8.45 dB, 10 dB, 30 dB.

[0397] It can be understood that the ranges of the corresponding power offsets in Set 5 and Set 6 are (0, 1], and the power offsets in Set 7 and Set 8 are greater than or equal to 1. Further, Set 6 can provide more and finer power offsets compared to Set 5, and Set 8 can provide more and finer power offsets compared to Set 7.

[0398] Based on the association relationship between the transmission parameters and the power offset introduced above, and the specific values of the power offset, the corresponding relationship between the power offset and the transmission parameters is introduced below for the first device to determine the power offset.

[0399] In a possible implementation, the transmission parameters may further include: the time-domain resources and / or frequency-domain resources for transmitting data signals. Among them, the power offset can be in one-to-one correspondence with the time-domain resources and / or frequency-domain resources for transmitting data signals. Among them, the time-domain resources and / or frequency-domain resources for transmitting data signals can be resources allocated by configured grant (CG), or dynamic resources scheduled by DCI. In other words, the first device can determine the power offset according to the time-domain resources and / or frequency-domain resources for transmitting data signals.

[0400] Optionally, the power offset can be in one-to-one correspondence with the modulation order. In other words, the first device can determine the power offset according to the modulation order.

[0401] Optionally, the power offset can be in one-to-one correspondence with the MCS. In other words, the first device can determine the power offset according to the MCS.

[0402] Optionally, the power offset can be in one-to-one correspondence with the clipping threshold. In other words, the first device can determine the power offset according to the clipping threshold.

[0403] Optionally, the power offset can be in one-to-one correspondence with the constellation Figure 1 diagram. In other words, the first device can determine the power offset according to the constellation diagram.

[0404] It should be understood that the above constellation diagram may refer to a constellation diagram different from the conventional constellation diagram corresponding to the modulation order. Taking 64-QAM as an example, the conventional constellation diagram may refer to the constellation diagram corresponding to 64-QAM as shown in Figure 5 In the conventional constellation diagram, the 64 constellation points are evenly distributed in an eight-row and eight-column manner. The constellation diagram different from the conventional constellation diagram corresponding to 64-QAM may refer to that the 64 constellation points are unevenly distributed in an eight-row and eight-column manner. Or, the constellation diagram different from the conventional constellation diagram corresponding to 64-QAM may refer to that the 64 constellation points are not distributed in an eight-row and eight-column manner. For example, the 64 constellation points are distributed in a four-row and sixteen-column manner; or, the 64 constellation points are distributed in a two-row and thirty-two-column manner.

[0405] It can be understood that different distributions of constellation points may cause different offsets between the modulation symbols and their actual corresponding constellation points in the aforementioned "downward clipping", and thus different constellation diagrams may correspond to different power offsets.

[0406] It should be understood that a type of parameter in the above transmission parameters (such as modulation order or clipping threshold, etc.) may correspond to multiple power offsets, that is, one value of this type of parameter may correspond to multiple power offsets. Further, the first device may select one power offset from multiple power offsets as the power offset. For example, when the modulation order value is 4, it may correspond to 3 different power offsets, and the first device may select one from the 3 power offsets as the power offset.

[0407] Or, a combination of multiple types of parameters in the above transmission parameters may correspond to one power offset, and thus the first device may determine the power offset according to the combination of the multiple types of parameters.

[0408] Exemplarily, Table 14 shows a corresponding relationship between a power offset, a modulation order, and a clipping threshold.

[0409] Table 14

[0410]

[0411] Among them, when the modulation order is 2 and the clipping threshold is 0.5, the first device may determine that the power offset is -1 dB. Or, when the modulation order is 8 and the clipping threshold is 0.2, the first device may determine that the power offset is -4.77 dB.

[0412] It can be understood that Table 14 is only an example, and there may be other corresponding relationships between the power offset, the modulation order, and the clipping threshold. The embodiments of the present application do not make specific limitations thereto.

[0413] It should be understood that when the power offset is determined by the first device, the first device may send the indication information of the power offset to the second device, or the first device may not send the indication information of the power offset to the second device. It can be understood that since there is a direct proportional relationship between the power offset and the modulation order, the larger the modulation order, the larger the power offset, and thus the greater the offset of the modulation symbols carried by the data signal on the constellation diagram. That is, the larger the modulation order, the greater the impact of the clipping process on the amplitude of the constellation points of the modulation symbols carried by the data signal (or the complex value or modulus value of the modulation symbol). Furthermore, the second device can determine the amplitude of the data signal based on the transmission power ratio (or EPRE ratio) between the data signal and the reference signal associated with the first channel, so as to reduce the bit error rate when the second device demodulates the data signal.

[0414] For example, when the modulation order of the data signal is greater than the second threshold, the first device sends the indication information of the power offset to the second device. In this way, the second device can determine the transmission power ratio between the data signal and the reference signal associated with the first channel based on the indication information of the power offset, so as to reduce the bit error rate when the second device demodulates the data signal.

[0415] For another example, when the modulation order of the data signal is less than or equal to the second threshold, the first device does not send the indication information of the power offset to the second device. It can be understood that when the modulation order is small, the impact of the clipping process on the complex value or modulus value of the modulation symbols carried by the data signal is small. In this way, the second device can determine the amplitude of the data signal based on the pre-configured transmission power ratio (or EPRE ratio) between the first channel and the reference signal associated with the first channel. That is to say, when the modulation order of the data signal is small, the second device can not sense the power offset, that is, the second device can not sense the clipping process of the data signal, and thus the indication overhead of the power offset can be saved.

[0416] It can be understood that the above second threshold can be 2, 4, 8, or other modulation orders, and the embodiments of the present application do not make specific limitations in this regard.

[0417] Next, the indication information of the power offset is introduced for the interaction between the first device and the second device.

[0418] Optionally, Figure 7 The method shown further includes:

[0419] S704. The first device sends indication information to the second device. Correspondingly, the second device receives the indication information from the first device. The indication information is used to indicate a power offset. That is to say, when the power offset is determined by the first device, the first device can send the indication information of the power offset to the second device, so that the second device can determine the transmission power ratio between the data signal and the reference signal associated with the first channel according to the power offset, and determine the amplitude of the received data signal according to the transmission power ratio, thereby reducing the bit error rate when the second device demodulates the data signal.

[0420] Optionally, Figure 7 The method shown further includes:

[0421] S705. The second device sends indication information to the first device. Correspondingly, the first device receives the indication information from the second device. The indication information is used to indicate a power offset. That is to say, the power offset can be indicated by the second device, and the first device can determine the power offset according to the indication information, which can increase the flexibility of the first device to determine the power offset to adapt to different scenarios.

[0422] It can be understood that for uplink transmission, the indication information can be carried by uplink control information (UCI). For downlink transmission, the indication information can be carried by one or more of an RRC message, DCI, or MAC control element (MAC CE). The RRC message can be an RRC setup message, or an RRC resume message, or an RRC reconfiguration message, etc. That is, the second device can send the indication information to the first device in any RRC connection state.

[0423] For example, for the foregoing method 1, the indication information can be carried by RRC signaling, and the RRC message can be an RRC message carrying the index j of the parameter set. For another example, for the foregoing method 2, the indication information can be carried by DCI or MAC control element MAC CE, and the DCI or MAC CE can be a DCI or MAC CE carrying TPC. For another example, for the foregoing method 3, the indication information can be carried by DCI, and the DCI can be a DCI carrying uplink scheduling information. For another example, for the foregoing method 4, the indication information can be carried by one or more of an RRC message, DCI, or MAC CE. For another example, for the uplink transmission in the foregoing solution 1, the indication information can be carried by UCI.

[0424] It can be understood that the indication information can directly indicate the specific value corresponding to the power offset, such as 1 / 2, or -3 dB, etc.

[0425] In a possible implementation, the indication information includes first indication information, and the first indication information is used to determine a power offset from a set of candidate power offsets. Among them, the set of candidate power offsets includes at least two power offsets. It can be understood that at least two power offsets in the set of candidate power offsets can be configured with corresponding indexes or identifiers one by one, and further, the first indication information can be the index or representation. That is to say, the first indication information can be the index or identifier of the power offset in the set of candidate power offsets, thereby reducing the indication overhead of the indication information and improving the reliability of the indication information.

[0426] It can be understood that the index of the power offset can be a number, a letter, or other symbols, and the embodiments of the present application do not make specific limitations thereto.

[0427] In addition, the indexes of the power offsets can be sorted in ascending or descending order of numerical magnitude, and the starting point of the sorting can be zero or other non-zero values.

[0428] For example, taking the multiple power offsets shown in Table 14 as an example, Table 15 shows the corresponding relationship between the indexes and the power offsets.

[0429] Table 15

[0430] Index Power offset U1 0 dB U2 -1 dB U3 -2 dB U4 -3 dB U5 -4.77 dB

[0431] It can also be understood that different indexes can also correspond to the same power offset value. For example, the indexes in Table 15 can also include index U6, and index U6 can correspond to the power offset of -4.77 dB, that is, indexes U5 and U6 indicate the same power offset.

[0432] It can also be understood that the first indication information can include one or more indexes, that is, the second device can indicate one or more power offsets to the first device. Further, in the case where the first indication information indicates multiple power offsets, the first device can select one power offset from the multiple power offsets. For example, the first device can select a suitable power offset from the multiple power offsets according to factors such as the performance parameters and working conditions of the transceiver device.

[0433] It should be understood that in the case where the power offset is associated with the transmission parameter, the index can also be associated with the transmission parameter, so that the above-mentioned partially unknown transmission parameters can also be determined through the index.

[0434] Exemplarily, taking Table 14 as an example, Table 16 shows the corresponding relationship between the index, modulation order, clipping threshold, and power offset.

[0435] Table 16

[0436]

[0437] As shown in Table 16, for the second device to send indication information to the first device, the first device can determine the clipping threshold according to the index and the MCS (i.e., modulation order) scheduled by the second device. It can be understood that the clipping threshold used by the first device for clipping the data information may not be the same as the clipping threshold corresponding to the index, but may be close to the clipping threshold corresponding to the index.

[0438] It can be understood that, in combination with Tables 14 to 16 above, the indication information can indicate the power offset ΔTh in Tables 6 to 13, and then update Tables 6 to 13.

[0439] It can be understood that the set of candidate power offsets can be pre-configured by the protocol or negotiated in advance between the first device and the second device. The embodiments of the present application do not make specific limitations on this.

[0440] In a possible implementation, the indication information further includes second indication information, and the second indication information is used to indicate the set of candidate power offsets. That is to say, the second device can configure the set of candidate power offsets for the first device to indicate to the first device multiple power offsets expected by the second device within a next period of time (for example, during the RRC connection duration).

[0441] It can be understood that the second indication information can be carried by an RRC message or other messages. The embodiments of the present application do not make specific limitations on this.

[0442] Since in the embodiments of the present application, the first device can determine the power offset, and determine the transmission power ratio between the data signal and the first channel according to the power offset, and then can determine the target transmission power of the first channel to compensate for the offset of the modulation symbol carried by the data signal on the constellation diagram caused by the clipping process, so as to reduce the misjudgment probability when the receiving end demodulates the data signal. Therefore, based on the power control method provided by the embodiments of the present application, the bit error rate during the data signal transmission can be reduced.

[0443] The above mainly introduces the solutions provided by the present application. Correspondingly, the present application further provides a communication device, which is used to implement various methods in the above method embodiments. The communication device can be the first device in the above method embodiments, or a device including the first device, or a component applicable to the first device, such as a chip or a chip system. Or, the communication device can be the second device in the above method embodiments, or a device including the second device, or a component applicable to calculate the second device, such as a chip or a chip system.

[0444] It can be understood that, in order to implement the above functions, the communication device includes the corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0445] The embodiments of the present application can divide the functional modules of the communication device according to the above method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0446] Taking the communication device as the first device or the second device in the above method embodiments as an example, Figure 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As Figure 8 shown, the communication device 800 includes: a processing module 801 and a transceiver module 802. Among them, the processing module 801 is used to execute the processing function of the first device or the second device in the above method embodiments. The transceiver module 802 is used to execute the transceiver function of the first device or the second device in the above method embodiments.

[0447] Among them, all relevant contents of each step involved in the above method embodiments can be cited in the function descriptions of the corresponding functional modules, and will not be repeated here.

[0448] Since the communication device 800 provided in this embodiment can execute the above method, the technical effects it can obtain can refer to the above method embodiments and will not be repeated here.

[0449] In a possible design solution, in the embodiments of the present application, the transceiver module 802 may include a receiving module and a sending module ( Figure 8 not shown in the figure). Among them, the transceiver module is used to implement the sending function and the receiving function of the communication device 800.

[0450] In a possible design solution, the communication device 800 may further include a storage module ( Figure 8(not shown in the figure), the storage module stores programs or instructions. When the processing module 801 executes the programs or instructions, the communication device 800 can perform Figure 7 the functions of the first device or the second device in the method shown.

[0451] It should be understood that the processing module 801 involved in the communication device 800 can be implemented by a processor or processor-related circuit components, and can be a processor or a processing unit; the transceiver module 802 can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or a transceiver unit.

[0452] Exemplarily, Figure 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application. The communication device can be the first device or the second device, or can be a chip (system) or other components or assemblies that can be set in the first device or the second device. As Figure 9 shown, the communication device 900 can include a processor 901.

[0453] In a possible design, the communication device 900 may further include a memory 902 and / or a transceiver 903. Wherein, the processor 901 is coupled to the memory 902 and the transceiver 903, and can be connected through a communication bus, for example.

[0454] Next, in conjunction with Figure 9 each component of the communication device 900 will be specifically introduced:

[0455] Among them, the processor 901 is the control center of the communication device 900, and can be a single processor or a collective term for multiple processing elements. For example, the processor 901 is one or more central processing units (CPUs), or can be an application specific integrated circuit (ASIC), or can be one or more integrated circuits configured to implement the embodiments of the present application, for example: one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs).

[0456] In a possible design, the processor 901 can execute various functions of the communication device 900 by running or executing software programs stored in the memory 902 and calling data stored in the memory 902.

[0457] In a specific implementation, as an embodiment, the processor 901 may include one or more CPUs, for example Figure 9CPU0 and CPU1 shown in

[0458] In a specific implementation, as an embodiment, the communication device 900 may also include multiple processors, such as Figure 9 the processors 901 and 904 shown in. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processors here may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0459] Among them, the memory 902 is used to store the software program for executing the solution of this application and is controlled by the processor 901 for execution. The specific implementation manner can refer to the above method embodiment and will not be elaborated here.

[0460] In a possible design, the memory 902 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but not limited to this. The memory 902 may be integrated with the processor 901 or exist independently and be coupled to the processor 901 through the interface circuit of the communication device 900 ( Figure 9 not shown in), and the embodiments of the present application do not make specific limitations on this.

[0461] The transceiver 903 is used for communication with other communication devices. For example, when the communication device 900 is the first device, the transceiver 903 can be used to communicate with the second device or another second device. Another example is that when the communication device 900 is the second device, the transceiver 903 can be used to communicate with the first device or another first device.

[0462] In a possible design, the transceiver 903 may include a receiver and a transmitter ( Figure 9(not shown separately). Among them, the receiver is used to implement the receiving function, and the transmitter is used to implement the sending function.

[0463] In a possible design, the transceiver 903 may be integrated with the processor 901 or exist independently, and is coupled to the processor 901 through the interface circuit of the communication device 900 ( Figure 9 (not shown in the figure), and the embodiments of the present application do not make specific limitations on this.

[0464] It should be noted that Figure 9 the structure of the communication device 900 shown in the figure does not constitute a limitation on the communication device. The actual communication device may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements.

[0465] In addition, the technical effects of the communication device 900 may refer to the technical effects of the method described in the above method embodiments, and will not be elaborated here.

[0466] In a possible implementation manner, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction is executed by the computer, it implements the functions of the above method embodiments.

[0467] In a possible implementation manner, an embodiment of the present application further provides a computer program product, which implements the functions of the above method embodiments when executed by the computer.

[0468] In a possible implementation manner, an embodiment of the present application further provides a communication system, which includes the first device described in the above method embodiments and the second device described in the above method embodiments.

[0469] In a possible implementation manner, an embodiment of the present application further provides a communication method, which includes the method described in any of the above method embodiments or any of its implementation manners.

[0470] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server, data center, etc. that contains one or more media integrated therein. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0471] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Skilled professionals can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the present application.

[0472] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0473] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling, direct coupling, or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0474] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0475] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0476] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs, and other various media that can store program codes.

[0477] Although the present application has been described in connection with various embodiments, those skilled in the art will recognize other variations of the disclosed embodiments upon reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the singular "a" or "an" does not exclude a plurality. A single processor or other unit may implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not indicate that these measures cannot be combined to good effect.

[0478] Although the present application has been described in connection with specific features and their embodiments, it will be apparent that various modifications and combinations can be made without departing from the scope of the present application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A power control method, characterized in that: The method comprises: generating a data signal after being subjected to amplitude limiting processing; Determine a power offset, where the power offset is used to determine a transmit power ratio between the data signal and a first channel, where the first channel is a channel that carries the data signal; A target transmit power of the first channel is determined according to the power offset.

2. The method according to claim 1, characterized in that The method further comprises: Send indication information, where the indication information is used to indicate the power offset.

3. The method according to claim 1, characterized in that The method further comprises: Indication information is received, where the indication information is used to indicate the power offset.

4. A power control method, characterized in that: The method comprises: Generate indication information, where the indication information is used to indicate a power offset corresponding to the data signal after the limiting process, where the power offset is used to determine a transmission power ratio between the data signal and a first channel, where the first channel is a channel that carries the data signal; The instruction information is sent.

5. A power control method, characterized in that: The method comprises: receiving indication information, where the indication information is used to indicate a power offset corresponding to a data signal after the limiting process, where the power offset is used to determine a transmission power ratio between the data signal and a first channel, where the first channel is a channel that carries the data signal; The power offset is determined according to the indication information.

6. The method according to any one of claims 2 to 5, characterized in that: The indication information includes first indication information, where the first indication information is used to determine the power offset from a candidate power offset set, where the candidate power offset set includes at least two power offsets.

7. The method according to claim 6, characterized in that The indication information further includes second indication information, where the second indication information is used to indicate the candidate power offset set.

8. The method according to any one of claims 1 to 7, characterized in that The power offset is a transmission power ratio between the data signal and the first channel; Alternatively, the power offset is a ratio between an actual amplitude of a modulation symbol and an amplitude of a constellation point corresponding to the modulation symbol, and the modulation symbol is a modulation symbol carried by the data signal; Alternatively, the power offset is a difference between a complex value corresponding to the modulation symbol and a complex value of a constellation point corresponding to the modulation symbol.

9. The method according to claim 8, characterized in that The target transmit power is determined based on the power offset and the power control parameters of the first channel, the power control parameters of the first channel include at least one of the following: the maximum transmit power of the terminal device, an open-loop power control parameter, a closed-loop power control parameter, or a modulation and coding scheme MCS, the open-loop power control parameter is used to determine the open-loop power of the first channel, the closed-loop power control parameter is used to determine the closed-loop power adjustment value of the first channel, and the MCS is used to determine the MCS power adjustment amount.

10. The method according to claim 8 or 9, characterized in that: The transmission power ratio between the data signal and the first channel includes any one of the following: a ratio between the transmission power of the data signal and the open-loop power of the first channel; a ratio between the transmit power of the data signal and a closed-loop power adjustment value of the first channel; a ratio between the transmit power of the data signal and the MCS power adjustment amount of the first channel; Or, the ratio between the transmission power of the data signal and the maximum transmission power of the terminal device corresponding to the first channel.

11. The method according to claim 10, characterized in that The open-loop power includes target receiving power and / or path loss compensation power; the ratio between the transmit power of the data signal and the open-loop power of the first channel includes: the ratio between the transmit power of the data signal and the target receiving power, or the ratio between the transmit power of the data signal and the path loss compensation power.

12. The method according to claim 11, characterized in that The target receiving power includes a public target receiving power and a dedicated target receiving power of the terminal device, and the ratio between the sending power of the data signal and the target receiving power includes: the ratio between the sending power of the data signal and the public target receiving power, or the ratio between the sending power of the data signal and the dedicated target receiving power.

13. The method according to any one of claims 10 to 12, characterized in that: The target transmit power is determined based on the adjusted open-loop power and at least one of the following: the closed-loop power adjustment value, the MCS power adjustment amount, and the maximum transmit power of the terminal device. The adjusted open-loop power is obtained by adjusting the open-loop power based on the power offset.

14. The method according to claim 13, characterized in that The target transmit power is determined based on the adjusted closed-loop power adjustment value and at least one of the following: the open-loop power, the MCS power adjustment amount, and the maximum transmit power of the terminal device. The adjusted closed-loop power adjustment value is obtained by adjusting the closed-loop power adjustment value based on the power offset.

15. The method according to claim 10, characterized in that The ratio between the transmission power of the data signal and the MCS power adjustment amount is used to adjust the number of bits per resource element BPRE.

16. The method according to claim 10 or 15, characterized in that The target transmit power is determined based on the adjusted MCS power adjustment amount and at least one of the following: the open-loop power, the closed-loop power adjustment value, and the maximum transmit power of the terminal device. The adjusted MCS power adjustment amount is obtained by adjusting the MCS power adjustment amount based on the power offset.

17. The method according to claim 10, characterized in that The ratio between the transmit power of the data signal and the maximum transmit power of the terminal device includes: a ratio or a difference between a maximum back-off power MPR value and a pre-configured MPR value.

18. The method according to claim 10 or 17, characterized in that The target transmit power is determined based on the adjusted maximum transmit power of the terminal device and at least one of the following: the open-loop power, the closed-loop power adjustment value, and the MCS power adjustment amount. The adjusted maximum transmit power of the terminal device is obtained by adjusting the maximum transmit power of the terminal device according to the power offset.

19. The method according to any one of claims 1 to 7, characterized in that: The power offset is a transmit power ratio between the data signal and a reference signal associated with the first channel; Alternatively, the power offset is a ratio of energy per resource element (EPRE) between the data signal and the reference signal; Alternatively, the power offset is a ratio between the transmit power ratio and a preconfigured transmit power ratio, and the preconfigured transmit power ratio is an EPRE ratio between the first channel and the reference signal.

20. The method according to claim 19, characterized in that The target transmit power is determined according to the power offset and the transmit power of the reference signal.

21. The method according to claim 19 or 20, characterized in that The reference signal includes: a demodulation reference signal DMRS, and / or a phase tracking reference signal PTRS.

22. The method according to any one of claims 1 to 21, characterized in that The power offset is associated with a transmission parameter used to transmit the signal, and the transmission parameter includes at least one of the following: An MCS for transmitting the data signal, a modulation method for transmitting the data signal, a constellation diagram for transmitting the data signal, a modulation order for transmitting the data signal, or a limiting threshold for performing limiting processing on the data signal.

23. A communication device, characterized in that: The communication device includes a module or unit for executing the method of any one of claims 1-3 and 6-22, or includes a module or unit for executing the method of any one of claims 4 and 6-22, or includes a module or unit for executing the method of any one of claims 5-22.

24. A communication device, characterized in that: The communication device includes a processor, and the processor is used to enable the communication device to execute the method according to any one of claims 1-3, 6-22 through logic circuits and / or execution instructions, or enable the communication device to execute the method according to any one of claims 4, 6-22, or enable the communication device to execute the method according to any one of claims 5-22.

25. The communication device according to claim 24, characterized in that The communication device further comprises a memory, wherein the memory is used to store the instruction.

26. The communication device according to claim 24 or 25, characterized in that: The communication device further comprises a communication interface, and the communication interface is used for inputting and / or outputting signaling and / or data.

27. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes instructions, and when the instructions are executed by a processor, the method according to any one of claims 1-3, 6-22 is implemented, or the method according to any one of claims 4, 6-22 is implemented, or the method according to any one of claims 5-22 is implemented.

28. A computer program product, characterized in that The computer program product comprises instructions, which, when executed on a computer, enable the computer to execute the method according to any one of claims 1-3, 6-22, or enable the computer to execute the method according to any one of claims 4, 6-22, or enable the computer to execute the method according to any one of claims 5-22.

29. A communication system, characterized in that: The communication system comprises a first device and a second device, wherein the first device is used to execute the method according to any one of claims 1-3 and 6-22, the second device is used to execute the method according to any one of claims 4 and 6-22, or the second device is used to execute the method according to any one of claims 5-22.

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