Power control method and communication device

Abstract

The invention provides a power control method, and the method comprises the steps: receiving indication information which is used for indicating the repeated transmission frequency of a terminal device for repeatedly transmitting a preamble sequence on a physical random access channel resource, and corresponding target receiving power. The number of times of repeated transmission comprises a first number of times of repeated transmission, and the first number of times of repeated transmission corresponds to at least one target receiving power. And the terminal equipment determines a second repeated transmission frequency and a corresponding second target receiving power in the at least one target receiving power according to the indication information. And the terminal equipment determines the sending power of sending the preamble sequence at a single time according to the second target receiving power, and sends the preamble sequence according to the second repeated sending times and the sending power. When the number of times that the terminal device repeatedly sends the preamble sequence is smaller than the number of times of repeated sending configured by the network device, the power from actual receiving of the preamble sequence to the total power of the network device can be greatly improved, and the detection performance of the network device on the preamble sequence is ensured.

Description

Technical Field

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

[0002] With the rapid development of the fifth generation mobile communication technology New Radio (NR), the demand for enhanced mobile broadband (eMBB) service communication rate continues to grow, and wireless communication has been widely used. In the random access process, the method of repeatedly sending the preamble sequence is currently used to protect wireless communication from environmental influences and improve signal coverage.

[0003] At present, network devices often configure the number of times to repeat the preamble sequence to the terminal device (for example: 2 times, 4 times, 8 times), but during the transmission process, the actual number of times the terminal device repeats the preamble sequence is less than the number of times the network device configures the preamble sequence to be repeated. The terminal device calculates the transmission power of a single transmission of the preamble sequence based on the target reception power corresponding to the number of times the network device configures the preamble sequence to be repeated. In the case where the actual number of times the terminal device repeats the transmission is less than the number of times the network device configures the preamble sequence to be repeated, the total reception power of the preamble sequence of the terminal device actually received by the network device is less than the target total reception power corresponding to the number of times the network device configures the terminal device to repeat the preamble sequence.

[0004] Therefore, when the number of times the terminal device actually repeats sending the preamble sequence is less than the number of times the network device is configured to repeat, how to ensure the detection performance of the network device for the preamble sequence is an urgent problem to be solved. Summary of the invention

[0005] The present application provides a power control method and a communication device, which can increase the total power of the network device actually receiving the preamble sequence of the terminal device when the number of times the terminal device repeatedly sends the preamble sequence is less than the number of repeated transmissions configured by the network device.

[0006] In a first aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device, or can also be executed by a chip or circuit for a terminal device, and the present application does not limit this. For ease of description, the following description is taken as an example of execution by a terminal device.

[0007] The method comprises: receiving indication information, the indication information being used to indicate the number of repetitions of a leading sequence that a terminal device repeatedly transmits on a physical random access channel (PRACH) resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions including a second number of repetitions, the second number of repetitions corresponding to at least one of the target receiving powers; determining, according to the indication information, a first number of repetitions for the terminal device to repeatedly transmit the leading sequence, and a first target receiving power corresponding to the first number of repetitions, the first target receiving power being determined according to the target receiving power, the first number of repetitions being less than the second number of repetitions, and the second number of repetitions being the number of repetitions closest to the first number of repetitions; determining, according to the first target receiving power and the first number of repetitions, a target receiving power for a single transmission of the leading sequence by the terminal device; determining a transmission power according to the target receiving power for the single transmission of the leading sequence, and transmitting the leading sequence to the network device according to the first number of repetitions and the transmission power, the transmission power being the transmission power for a single transmission of the leading sequence by the terminal device.

[0008] It should be understood that the number of repeated transmissions in the present application may also be referred to as a repetition level, or a repeated transmission level.

[0009] It should be understood that in the first aspect, the target received power can be understood as the total target received power of the network device, that is, the first target received power is the sum of the multiple single target received powers of the terminal device sending the leading sequence to the network device according to the first number of repetitions; or, the first target received power is the sum of the single target received powers of the PRACH transmissions of the first number of repetitions when the number of repetitions configured for the network device is the first number of repetitions.

[0010] It should be understood that in the present application, sending a preamble sequence to a network device according to a first number of repetitions and a transmission power can be understood as: the terminal device sends a preamble sequence to the network device the first number of repetitions based on the transmission power; or, the terminal device sends the preamble sequence the first number of repetitions to the network device, and the transmission power of each transmission of the preamble sequence is a transmission power determined according to the target receiving power of the single transmission of the preamble sequence.

[0011] It should be understood that the first target received power is determined according to the target received power, which may include the following situations:

[0012] Example 1: The target received power includes at least one target received power, the at least one target received power includes a first target received power, and the terminal device determines the first target received power according to the first number of repeated transmissions and the at least one target received power;

[0013] Example 2: The target received power includes at least one target received power, the at least one target received power includes a second target received power corresponding to a second number of repeated transmissions, and does not include a first target received power corresponding to a first number of repeated transmissions. The indication information may include at least one power offset value, and the terminal device determines the first target received power according to the second target received power in the at least one target received power and the at least one power offset value in the indication information;

[0014] Example 3: The target received power includes at least one target received power, and the at least one target received power includes a second target received power corresponding to a second number of repeated transmissions, and does not include a first target received power corresponding to a first number of repeated transmissions. The terminal device is predefined / preconfigured with at least one power offset value or a calculation rule / method for the target power, and the terminal device determines the first target received power based on the second target received power in the at least one target received power and the predefined power offset value / calculation rule / calculation method.

[0015] According to the method provided in the present application, the terminal device determines a first number of repeated transmissions according to the indication information, and the first number of repeated transmissions is less than the second number of repeated transmissions indicated by the network device in the indication information, and the second number of repeated transmissions is the number of repeated transmissions closest to the first number of repeated transmissions in the indication information. The terminal device determines the target receiving power of the terminal device for a single transmission of the leading sequence according to the first number of repeated transmissions and the first target receiving power corresponding to the first number of repeated transmissions. Compared with determining the target receiving power of a single transmission leading sequence according to the second number of repeated transmissions, the target receiving power determined by the terminal device is determined according to the actual number of repeated transmissions, rather than the number of repeated transmissions preconfigured by the network device, which can greatly improve the total power of the leading sequence of the terminal device actually received by the network device, thereby further ensuring the detection performance of the network device for the leading sequence of the terminal device.

[0016] In combination with the first aspect, in some possible implementation methods, when the first target received power is the total target received power corresponding to the first number of repeated transmissions configured by the network device in the indication information, the target received power of the terminal device for a single transmission of the leading sequence is determined based on the first target received power and the first number of repeated transmissions, including: determining the target received power of the single transmission leading sequence based on the difference between the logarithmic value corresponding to the first number of repeated transmissions and the first target received power.

[0017] Exemplarily, in an enhanced machine-type communication (eMTC) scenario, the target received power of a single transmission preamble sequence is determined according to the total target received power (e.g., the first target received power) corresponding to the first number of repeated transmissions configured in the indication information and the first number of repeated transmissions. Assume that the first target received power is a logarithmic value, for example: the target received power of a single transmission preamble sequence = the first target received power - 10log10 (the first number of repeated transmissions).

[0018] In combination with the first aspect, in some possible implementations, the second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include the second target received power.

[0019] It should be understood that the indication information includes the number of repetitions configured by the network device and the target received power corresponding to the number of repetitions. Among them, the second number of repetitions configured by the network device may correspond to multiple target received powers, and after the terminal device determines the first number of repetitions, it further determines the first target received power based on the multiple target received powers, and calculates the target received power and the transmit power of the single transmission preamble sequence based on the first number of repetitions and the first target received power.

[0020] In combination with the first aspect, in some possible implementation methods, the indication information is used to indicate the second number of repeated transmissions, and the at least two target received powers corresponding to the second number of repeated transmissions, and the at least two target received powers also include the first target received power, or the indication information is used to indicate the second number of repeated transmissions, and the second target received power corresponding to the second number of repeated transmissions and at least one target power offset value, and the at least one target power offset value is used to determine the first target received power.

[0021] It should be understood that the indication information can directly indicate to the terminal device at least two target receiving powers corresponding to the second number of repeated transmissions, and the at least two target receiving powers include the first target receiving power corresponding to the first number of repeated transmissions; or, the indication information can also indicate to the terminal device at least one target power offset value corresponding to the second number of repeated transmissions, and the terminal device determines the first target receiving power corresponding to the first number of repeated transmissions based on the second target receiving power corresponding to the second number of repeated transmissions and the at least one target power offset value.

[0022] In a second aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device, or can also be executed by a chip or circuit for a terminal device, and the present application does not limit this. For ease of description, the following description is taken as an example of execution by a terminal device.

[0023] The method comprises: receiving indication information, the indication information being used to indicate the number of repetitions of a leading sequence that a terminal device repeatedly transmits on a physical random access channel (PRACH) resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions including a second number of repetitions, the second number of repetitions corresponding to at least one of the target receiving powers; determining, according to the indication information, a first number of repetitions for the terminal device to repeatedly transmit the leading sequence, and a first target receiving power corresponding to the first number of repetitions, the first target receiving power being determined according to the target receiving power, the first number of repetitions being less than the second number of repetitions, and the second number of repetitions being the number of repetitions closest to the first number of repetitions; determining, according to the first target receiving power and a first value, a target receiving power for a single transmission of the leading sequence; determining a transmission power according to the target receiving power for the single transmission of the leading sequence, and transmitting the leading sequence to the network device according to the first number of repetitions and the transmission power, the transmission power being the transmission power for a single transmission of the leading sequence by the terminal device.

[0024] Optionally, the target received power for the single transmission of the preamble sequence is greater than a third target received power, and the third target received power is the target received power for the single transmission of the preamble sequence determined according to the first target received power.

[0025] It should be understood that the indication information includes the second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. Assuming that the target received power corresponding to the second number of repeated transmissions is a target received power (e.g., the second target received power), the terminal device determines the first number of repeated transmissions and the first target received power corresponding to the first number of repeated transmissions according to the indication information, that is, the first target received power is equal to the second target received power.

[0026] It should also be understood that the indication information includes the second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. Assume that the target received power corresponding to the second number of repeated transmissions is a plurality of target received powers, wherein the second target received power among the plurality of target received powers corresponds to the second number of repeated transmissions, and the first target received power corresponds to the first number of repeated transmissions. The terminal device determines the first number of repeated transmissions and the first target received power corresponding to the first number of repeated transmissions according to the indication information, that is, the plurality of target received powers include the first target received power, and the first target received power is not equal to the second target received power.

[0027] It should be understood that in the second aspect, the target received power may be the total target received power of the network device, or the target received power may be a single target received power configured for the network device. That is, the first target received power may be the total target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions, or the first target received power may be a single target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions. For a detailed description of the first target received power being the total target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions, or the single target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions, please refer to the specific description in the specific embodiments section.

[0028] According to the method provided by the present application, after the terminal device determines the first target received power according to the first number of repeated transmissions, the terminal device increases the first target received power according to the first value to obtain the target received power of the single transmission preamble sequence. The target received power of the single transmission preamble sequence is greater than the single target received power (third target received power) of the preamble sequence determined according to the first target received power. The terminal device determines the transmission power of the single transmission preamble sequence according to the target received power of the single transmission preamble sequence. Even if the first number of repeated transmissions is less than the second number of repeated transmissions, the method provided by the present application can greatly improve the total power of the network device actually receiving the preamble sequence of the terminal device, thereby further ensuring the detection performance of the network device on the preamble sequence of the terminal device.

[0029] In combination with the second aspect, in some possible implementation methods, when the first target received power is the total target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, determining the target received power for a single transmission of the preamble sequence according to the first target received power and the first value includes: determining a fourth target received power according to the first target received power and the first value, the fourth target received power being greater than the first target received power; determining the target received power for the single transmission of the preamble sequence according to the fourth target received power and the second number of repeated transmissions,

[0030] or,

[0031] In the case where the first target received power is the single target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, the first target received power is equal to the third target received power, and the target received power for the single transmission of the preamble sequence is determined based on the first target received power and the first value, including: the target received power for the single transmission of the preamble sequence is determined based on the third target received power and the first value.

[0032] It should be understood that when the first target received power is the total target received power, the terminal device may first expand the first target received power to obtain the fourth target received power. The terminal device then determines the target received power for a single transmission of the preamble sequence based on the fourth target received power and the second number of repeated transmissions; when the first target received power is the target received power for a single transmission of the preamble sequence, the terminal device may directly calculate the first target received power and the first value to determine the target received power for a single transmission of the preamble sequence;

[0033] In conjunction with the second aspect, in some possible implementations, the determining the target received power of the single transmission of the preamble sequence according to the first target received power and the first value includes: when the first target received power is a linear value, and the first value is a linear value, determining the target received power of the single transmission of the preamble sequence according to the product of the first target received power and the first value, and the first value is a positive number greater than 1;

[0034] or,

[0035] The first target received power is a logarithmic value. When the first value is a logarithmic value, the target received power of the single transmission of the preamble sequence is determined according to the sum of the first target received power and the first value, and the first value is a positive number greater than 0;

[0036] or,

[0037] The first target received power is a logarithmic value. When the first value is a linear value, the target received power of the single transmission of the leading sequence is determined based on the sum of the logarithmic value corresponding to the first value and the first target received power. The first value is a positive number greater than 1.

[0038] It should be understood that the first value may be preconfigured / predefined, or the first value may be indicative, which is not limited in the embodiments of the present application.

[0039] Based on the above technical method, the terminal device can expand the target receiving power of a single transmission preamble sequence according to the first value, and the transmitting power of the terminal device will increase accordingly, thereby enabling the network device to actually receive the preamble sequence of the terminal device to have a significant improvement in the total power, thereby ensuring the network device's detection performance of the preamble sequence of the terminal device.

[0040] In combination with the second aspect, in some possible implementations, the second number of repeated transmissions corresponds to at least two target received powers among the target received powers, and the at least two target received powers include the second target received power.

[0041] It should be understood that when the indication information includes the second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least two target received powers, the at least two target received powers include the second target received power corresponding to the second number of repeated transmissions.

[0042] Optionally, the at least two target receiving powers may also include a first target receiving power corresponding to a first number of repeated transmissions.

[0043] In combination with the second aspect, in some possible implementation methods, the indication information is used to indicate the second number of repeated transmissions, and at least two target received powers corresponding to the second number of repeated transmissions, and the at least two target received powers also include the first target received power, or the indication information is used to indicate the second number of repeated transmissions, and the second target received power corresponding to the second number of repeated transmissions and at least one target power offset value, and the at least one target power offset value is used to determine the first target received power.

[0044] In a third aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device, or can also be executed by a chip or circuit for a terminal device, and the present application does not limit this. For ease of description, the following description is taken as an example of execution by a terminal device.

[0045] The method comprises: receiving indication information, the indication information being used to indicate the number of repetitions of a preamble sequence repeatedly sent by a terminal device on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions comprising a second number of repetitions, the second number of repetitions corresponding to at least two of the target receiving powers;

[0046] Determine, according to the indication information, a first number of repetitions of the leading sequence that the terminal device repeatedly sends, and a first target reception power corresponding to the first number of repetitions, the first target reception power being one of the at least two target reception powers, the first number of repetitions being less than the second number of repetitions, and the second number of repetitions being the number of repetitions that is closest to the first number of repetitions among the number of repetitions;

[0047] The transmission power is determined according to the first target receiving power, and the leading sequence is sent to the network device according to the first number of repeated transmissions. The transmission power is the transmission power of the leading sequence sent by the terminal device for a single time.

[0048] It should be understood that in the third aspect, the target received power may be the total target received power of the network device, or the target received power may be a single target received power configured for the network device. That is, the first target received power may be the total target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions, or the first target received power may be a single target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions. For a detailed description of the first target received power being the total target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions, or the single target received power configured for the network device determined by the terminal device according to the first number of repeated transmissions, please refer to the specific description in the specific embodiments section.

[0049] According to the method provided in the present application, the second number of repeated transmissions in the indication information corresponds to at least two target received powers. After the terminal device determines the first number of repeated transmissions, it determines the transmission power of the single transmission of the preamble sequence according to the first target received power among the at least two target powers. The terminal device sends the preamble sequence to the network device according to the first number of repeated transmissions and the transmission power. Among them, the second number of repeated transmissions in the indication information corresponds to at least two target received powers. After the terminal device determines the first number of repeated transmissions, it selects the first target received power corresponding to the first number of repeated transmissions from the at least two target received powers, instead of directly selecting the second target received power corresponding to the second number of repeated transmissions as the first target received power to determine the transmission power of the single transmission of the preamble sequence, so that the network device can actually receive the preamble sequence of the terminal device to a large extent to the total power, thereby further ensuring the detection performance of the network device for the preamble sequence of the terminal device.

[0050] In combination with the third aspect, in some possible implementation methods, the indication information is used to indicate the second number of repeated transmissions, and at least two target received powers corresponding to the second number of repeated transmissions, and the at least two target received powers include the first target received power, or the indication information is used to indicate the second number of repeated transmissions, and the second target received power corresponding to the second number of repeated transmissions and at least one target power offset value, and the at least one target power offset value is used to determine the first target received power.

[0051] It should be understood that the indication information can directly indicate to the terminal device at least two target receiving powers corresponding to the second number of repeated transmissions, and the at least two target receiving powers include the first target receiving power corresponding to the first number of repeated transmissions; or, the indication information can also indicate to the terminal device at least one target power offset value corresponding to the second number of repeated transmissions, and the terminal device determines the first target receiving power corresponding to the first number of repeated transmissions based on the second target receiving power corresponding to the second number of repeated transmissions and the at least one target power offset value.

[0052] In a fourth aspect, an embodiment of the present application provides a communication method, which can be executed by a network device, or can also be executed by a chip or circuit used for a network device, and the present application does not limit this. For ease of description, the following is an example of execution by a network device.

[0053] The method includes: sending indication information, the indication information is used to indicate the number of repetitions of a preamble sequence repeatedly sent by a terminal device on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions including a second number of repetitions, the second number of repetitions corresponding to at least one of the target receiving powers;

[0054] Receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on a target receive power of a single transmission of the preamble sequence, the target receive power of a single transmission of the preamble sequence is determined based on a first target receive power and a first number of repeated transmissions, the first target receive power and the first number of repeated transmissions are determined based on the indication information, the first target receive power is determined based on the target receive power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

[0055] In combination with the fourth aspect, in some possible implementation methods, the target receiving power of the single transmission of the leading sequence is determined based on the first target receiving power and the first number of repeated transmissions, including: the first target receiving power is a logarithmic value, the first number of repeated transmissions is a linear value, and the target receiving power of the single transmission of the leading sequence by the terminal device is determined based on the difference between the logarithmic value corresponding to the first number of repeated transmissions and the first target receiving power.

[0056] In combination with the fourth aspect, in some possible implementations, the second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include the second target received power.

[0057] In combination with the fourth aspect, in some possible implementation methods, the indication information is used to indicate the second number of repeated transmissions, and the at least two target received powers corresponding to the second number of repeated transmissions, and the at least two target received powers also include the first target received power, or the indication information is used to indicate the second number of repeated transmissions, and the second target received power corresponding to the second number of repeated transmissions and at least one target power offset value, and the at least one target power offset value is used to determine the first target received power.

[0058] In a fifth aspect, an embodiment of the present application provides a communication method, which can be executed by a network device, or can also be executed by a chip or circuit used for a network device, and the present application does not limit this. For ease of description, the following is an example of execution by a network device.

[0059] The method includes: sending indication information, the indication information is used to indicate the number of repetitions of a preamble sequence repeatedly sent by a terminal device on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions including a second number of repetitions, the second number of repetitions corresponding to at least one of the target receiving powers;

[0060] Receive the preamble sequence sent by the terminal device, the transmission power of the terminal device corresponding to the preamble sequence is determined based on a target reception power of the preamble sequence for a single transmission, the target reception power of the preamble sequence for a single transmission is determined based on a first target reception power and a first value, the first target reception power is determined based on the target reception power, the first target reception power corresponds to a first number of repeated transmissions, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions among the number of repeated transmissions that is closest to the first number of repeated transmissions.

[0061] Optionally, the target received power for the single transmission of the preamble sequence is greater than a third target received power, and the third target received power is the target received power for the single transmission of the preamble sequence determined according to the first target received power.

[0062] In conjunction with the fifth aspect, in some possible implementations, the target received power of the single transmission of the preamble sequence is determined according to the first target received power and the first value, including:

[0063] In a case where the first target received power is the total target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, the target received power for a single transmission of the preamble sequence is determined according to a fourth target received power and the second number of repeated transmissions, the fourth target received power is determined according to the first target received power and the first value, and the fourth target received power is greater than the first target received power;

[0064] or,

[0065] In a case where the first target received power is a single target received power for transmitting the leading sequence corresponding to the first number of repeated transmissions determined according to the indication information, the target received power for the single transmission of the leading sequence is determined based on a third target received power and the first value, and the third target received power is equal to the first target received power.

[0066] In conjunction with the fifth aspect, in some possible implementations, the target received power of the single transmission of the preamble sequence is determined according to the first target received power and the first value, including:

[0067] The first target received power is a linear value. When the first value is a linear value, the target received power of the single transmission of the preamble sequence is determined according to the product of the first target received power and the first value, and the first value is a positive number greater than 1;

[0068] or,

[0069] The first target received power is a logarithmic value. When the first value is a logarithmic value, the target received power of the single transmission of the preamble sequence is determined according to the sum of the first target received power and the first value, and the first value is a positive number greater than 0;

[0070] or,

[0071] The first target received power is a logarithmic value. When the first value is a linear value, the target received power of the single transmission of the leading sequence is determined based on the sum of the logarithmic value corresponding to the first value and the first target received power, and the first value is a positive number greater than 1.

[0072] In combination with the fifth aspect, in some possible implementations, the second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include the second target received power.

[0073] In combination with the fifth aspect, in some possible implementation methods, the indication information is used to indicate the second number of repeated transmissions, and the at least two target received powers corresponding to the second number of repeated transmissions, and the at least two target received powers also include the first target received power, or the indication information is used to indicate the second number of repeated transmissions, and the second target received power corresponding to the second number of repeated transmissions and at least one target power offset value, and the at least one target power offset value is used to determine the first target received power.

[0074] In a sixth aspect, an embodiment of the present application provides a communication method, which can be executed by a network device, or can also be executed by a chip or circuit used for a network device, and the present application does not limit this. For ease of description, the following is an example of execution by a network device.

[0075] The method comprises: sending indication information, the indication information being used to indicate the number of repetitions of a preamble sequence repeatedly sent by a terminal device on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions comprising a second number of repetitions, the second number of repetitions corresponding to at least two of the target receiving powers;

[0076] Receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on a first target receive power, the first target receive power is one of the at least two target receive powers, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions among the number of repeated transmissions that is closest to the first number of repeated transmissions.

[0077] In combination with the sixth aspect, in some possible implementation methods, the indication information is used to indicate the second number of repeated transmissions, and at least two target received powers corresponding to the second number of repeated transmissions, and the at least two target received powers include the first target received power, or the indication information is used to indicate the second number of repeated transmissions, and the second target received power corresponding to the second number of repeated transmissions and at least one target power offset value, and the at least one target power offset value is used to determine the first target received power.

[0078] In a seventh aspect, a communication device is provided, comprising a transceiver unit and a processing unit, the transceiver unit being used to receive indication information, the indication information being used to indicate the number of repetitions of a leading sequence to be repeatedly sent by a terminal device on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions including a second number of repetitions corresponding to at least one of the target receiving powers; the processing unit being used to determine, according to the indication information, a first number of repetitions of the leading sequence to be repeatedly sent by the terminal device, and a first target receiving power corresponding to the first number of repetitions, the first target receiving power corresponding to the first number of repetitions. The power is determined according to the target received power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions; the processing unit is also used to determine the target received power of the terminal device for a single transmission of the leading sequence according to the first target received power and the first number of repeated transmissions; the transceiver unit is also used to determine the transmission power according to the target received power of the single transmission of the leading sequence, and send the leading sequence to the network device according to the first number of repeated transmissions and the transmission power, and the transmission power is the transmission power of the terminal device for a single transmission of the leading sequence.

[0079] The transceiver unit can perform the reception and transmission processing in the aforementioned first aspect; the processing unit can perform other processing except reception and transmission in the aforementioned first aspect.

[0080] In an eighth aspect, a communication device is provided, comprising a transceiver unit and a processing unit, the transceiver unit being used to receive indication information, the indication information being used to indicate the number of repetitions of a leading sequence to be repeatedly sent by a terminal device on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repetitions, the number of repetitions including a second number of repetitions corresponding to at least one of the target receiving powers; the processing unit being used to determine, according to the indication information, a first number of repetitions of the leading sequence to be repeatedly sent by the terminal device, and a first target receiving power corresponding to the first number of repetitions. A target receiving power is determined based on the target receiving power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions; the processing unit is also used to determine the target receiving power of the single transmission of the leading sequence based on the first target receiving power and the first value; the transceiver unit is also used to determine the transmission power based on the target receiving power of the single transmission of the leading sequence, and send the leading sequence to the network device according to the first number of repeated transmissions and the transmission power, and the transmission power is the transmission power of the terminal device sending the leading sequence for a single time.

[0081] Optionally, the target received power of the single transmission of the preamble sequence is greater than a third target received power, and the third target received power is the target received power of the single transmission of the preamble sequence determined according to the first target received power.

[0082] The transceiver unit may perform the reception and transmission processing in the aforementioned second aspect; the processing unit may perform other processing except reception and transmission in the aforementioned second aspect.

[0083] In a ninth aspect, a communication device is provided, comprising a transceiver unit and a processing unit,

[0084] The transceiver unit is used to receive indication information, where the indication information is used to indicate the number of repetitions of the leading sequence that the terminal device repeatedly sends on the physical random access channel PRACH resource, and the target receiving power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, where the second number of repetitions corresponds to at least two of the target receiving powers; the processing unit is used to determine, based on the indication information, a first number of repetitions for the leading sequence that the terminal device repeatedly sends, and a first target receiving power corresponding to the first number of repetitions, where the first target receiving power is one of the at least two target receiving powers, where the first number of repetitions is less than the second number of repetitions, and where the second number of repetitions is the number of repetitions that is closest to the first number of repetitions; the transceiver unit is also used to determine the transmission power based on the first target receiving power, and to send the leading sequence to the network device according to the first number of repetitions, where the transmission power is the transmission power of the leading sequence that the terminal device sends once.

[0085] The transceiver unit can perform the reception and transmission processing in the aforementioned third aspect; the processing unit can perform other processing except reception and transmission in the aforementioned third aspect.

[0086] In the tenth aspect, a communication device is provided, including a transceiver unit, which is used to send indication information, wherein the indication information is used to instruct the terminal device to repeatedly send a preamble sequence on a physical random access channel PRACH resource The number of repetitions and the target receiving power corresponding to the number of repetitions include a second number of repetitions, and the second number of repetitions corresponds to at least one of the target receiving powers; the transceiver unit is also used to receive the preamble sequence sent by the terminal device, and the transmission power of the terminal device corresponding to the preamble sequence is determined according to the target receiving power of a single transmission of the preamble sequence, and the target receiving power of the single transmission of the preamble sequence is determined according to a first target receiving power and a first number of repetitions, the first target receiving power and the first number of repetitions are determined according to the indication information, the first target receiving power is determined according to the target receiving power, the first number of repetitions is less than the second number of repetitions, and the second number of repetitions is the number of repetitions that is closest to the first number of repetitions among the number of repetitions.

[0087] The transceiver unit can perform the reception and transmission processing in the aforementioned fourth aspect.

[0088] In one possible implementation, the communication device further includes a processing unit, which can perform other processing in addition to receiving and sending in the aforementioned fourth aspect.

[0089] In the eleventh aspect, a communication device is provided, including a transceiver unit for sending indication information, wherein the indication information is used to indicate the number of repetitions of a preamble sequence sent by a terminal device on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repetitions, wherein the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target receiving powers; the transceiver unit is also used to receive the preamble sequence sent by the terminal device, the transmitting power of the terminal device corresponding to the preamble sequence is determined based on the target receiving power of a single transmission of the preamble sequence, the target receiving power of the single transmission of the preamble sequence is determined based on a first target receiving power and a first value, the first target receiving power is determined based on the target receiving power, the first target receiving power corresponds to a first number of repetitions, the first number of repetitions is less than the second number of repetitions, and the second number of repetitions is the number of repetitions that is closest to the first number of repetitions among the number of repetitions.

[0090] Optionally, the target received power for the single transmission of the preamble sequence is greater than a third target received power, and the third target received power is the target received power for the single transmission of the preamble sequence determined according to the first target received power.

[0091] The transceiver unit can perform the reception and transmission processing in the aforementioned fifth aspect.

[0092] In one possible implementation, the communication device further includes a processing unit, which can perform other processing in addition to receiving and sending in the aforementioned fifth aspect.

[0093] In a twelfth aspect, a communication device is provided, including a transceiver unit, configured to send indication information, the indication information being used to instruct a terminal device to repeatedly send a preamble sequence on a physical random access channel PRACH resource, and a target receiving power corresponding to the number of repeated transmissions, the number of repeated transmissions including a second number of repeated transmissions, the second number of repeated transmissions corresponding to at least two of the target receiving powers;

[0094] The transceiver unit is also used to receive the preamble sequence sent by the terminal device, the transmission power of the terminal device corresponding to the preamble sequence is determined based on a first target receiving power, the first number of repeated transmissions is one of the at least two target receiving powers, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

[0095] The transceiver unit can perform the reception and transmission processing in the aforementioned sixth aspect.

[0096] In one possible implementation, the communication device also includes a processing unit, which can perform other processing in addition to receiving and sending in the aforementioned sixth aspect.

[0097] In a thirteenth aspect, a communication device is provided, the device comprising: a transceiver module and a processing module, the transceiver module is used to execute the above-mentioned

[0098] The steps of sending and receiving information in the method provided in the above aspects, and the processing module is used to execute the processing steps in the methods provided in the above aspects.

[0099] In a fourteenth aspect, a communication device is provided, which includes: a memory for storing programs; a processor for executing the programs stored in the memory, and when the programs stored in the memory are executed, the processor is used to execute the methods provided in the above aspects.

[0100] In a fifteenth aspect, the present application provides a processor for executing the methods provided in the above aspects. In the process of executing these methods, the process of sending the above information and obtaining / receiving the above information in the above methods can be understood as the process of the processor outputting the above information and the process of the processor receiving the input above information. When outputting the above information, the processor outputs the above information to the transceiver so that it can be transmitted by the transceiver. After being output by the processor, the above information may also need to be processed otherwise before reaching the transceiver. Similarly, when the processor receives the input information, the transceiver obtains / receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to be processed otherwise before being input into the processor.

[0101] Based on the above principles, for example, the receiving request message mentioned in the above method can be understood as the information received by the processor. For the operations such as transmission, sending and acquisition / reception involved in the processor, if there is no special explanation, or if it does not conflict with its actual role or internal logic in the relevant description, it can be more generally understood as the output, reception, input and other operations of the processor, rather than the transmission, sending and receiving operations directly performed by the radio frequency circuit and antenna.

[0102] In the implementation process, the processor may be a processor specifically used to execute these methods, or a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor. The memory may be a non-transitory memory, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or may be separately arranged on different chips. The embodiment of the present application does not limit the type of memory and the arrangement of the memory and the processor.

[0103] In a sixteenth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, and the program code includes a method for executing the methods provided in the above aspects.

[0104] In the seventeenth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the methods provided in the above aspects.

[0105] In an eighteenth aspect, a chip is provided, which includes a processor and a communication interface, and the processor reads instructions stored in a memory through the communication interface to execute the methods provided in the above aspects.

[0106] Optionally, as an implementation manner, the chip may further include a memory, in which instructions are stored, and the processor is used to execute the instructions stored in the memory. When the instructions are executed, the processor is used to execute the methods provided by the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0107] Figure 1 A communication system to which the embodiment of the present application is applicable is shown.

[0108] Figure 2 A schematic diagram of a contention-based random access process is shown.

[0109] Figure 3 A schematic diagram showing a target receiving power corresponding to a repeatedly transmitted preamble.

[0110] Figure 4 A schematic flow chart of a power control method provided in an embodiment of the present application is shown.

[0111] Figure 5 A schematic block diagram of a communication device provided in an embodiment of the present application is shown.

[0112] Figure 6 A schematic block diagram of another communication device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0113] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0114] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) communication system, new radio access technology (NR) and future communication systems, etc.

[0115] It should be understood that the network device in the wireless communication system can be any device with wireless transceiver function. The device includes but is not limited to: evolved NodeB (eNB or eNodeB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), base band unit (BBU), access point (AP) in wireless fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., and can also be a gNB in ​​5G, such as NR, system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

[0116] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB, for example, the CU implements the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers, and the DU implements the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, therefore, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or by the DU+CU. It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in an access network (radio access network, RAN), and the CU can also be divided into a network device in a core network (core network, CN), which is not limited in this application.

[0117] It should also be understood that the terminal equipment in the wireless communication system can also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device. The terminal equipment in the embodiments of the present application can be a mobile phone, customer-premises equipment (CPE), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios.

[0118] In an embodiment of the present application, a terminal device or a network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as it can communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application can be a terminal device or a network device, or a functional module in a terminal device or a network device that can call a program and execute a program.

[0119] The application scenarios of the method and device embodiments of the present application are described below.

[0120] Figure 1 Schematic diagram of a communication system applicable to an embodiment of the present application. Figure 1 As shown, the communication system 10 may include at least one network device, such as Figure 1 The network device 11 shown; the communication system 10 may also include multiple terminal devices, such as Figure 1 The first terminal device 12 and the second terminal device 13 are shown. The network device 11 can communicate with the first terminal device 12 and the second terminal device 13 via a wireless link. Each communication device, such as the network device 11, the first terminal device 12, and the second terminal device 13, can be configured with multiple antennas, and the multiple antennas may include at least one transmitting antenna for sending signals and at least one receiving antenna for receiving signals. In addition, each communication device also additionally includes a transmitter chain and a receiver chain. It can be understood by a person of ordinary skill in the art that they can all include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, demodulators, demultiplexers or antennas, etc.). Therefore, the network device 11, the first terminal device 12, and the second terminal device 13 can communicate via multi-antenna technology.

[0121] It should be understood that the network device 11 may send downlink signaling to the first terminal device 12 and the second terminal device 13, where the downlink signaling is used to instruct the first terminal device 12 and the second terminal device 13 which specific uplink resources to use for transmission.

[0122] To facilitate understanding of the embodiments of the present application, the following briefly describes the relevant technical contents involved in the present application.

[0123] 1. Random access (RA):

[0124] In a communication system with access control, random access is an information exchange mechanism (or process) used by a device that is not connected to the network to establish a connection with the network. It is divided into two types: contention random access and non-contention random access.

[0125] The following takes contention random access as an example. Figure 2 It is a flowchart of contention random access.

[0126] Message 1 (Msg1): The terminal device selects a random access opportunity (RACH occasion, RO) associated with the synchronization signal block (SSB) to send a preamble code, or a preamble sequence (preamble, that is, Msg1) according to the system message sent by the network device and the index of the selected synchronization signal block (Synchronization Signal and PBCH Block, SSB). After determining the RO, the terminal device randomly selects a preamble and sends the selected preamble in the selected RO.

[0127] Among them, the terminal device selects the index of the synchronization signal block SSB, which can be understood as each synchronization signal block SSB corresponds to a beam. The terminal will obtain the threshold of the reference signal receiving power (RSRP) from the protocol and select a beam greater than the RSRP threshold. Generally speaking, the terminal device will select the beam with the largest RSRP from the beam, which corresponds to an SSB. The random access opportunity RO can be understood as the time-frequency resource used by the terminal device for random access. The network device can pre-configure the correspondence between the random access opportunity RO and the SSB.

[0128] Among them, a RO can transmit up to 64 preambles at the same time, and the terminal selects one of the 64 preambles to send. Then the terminal sends the preamble to the network device, which is carried by the physical random access channel (PRACH).

[0129] In order to increase the receiving power of the preamble code and improve the coverage capability, the terminal device can repeatedly send the preamble code on the RO of the repeatedly transmittable preamble code corresponding to the selected SSB in a manner less than or equal to the same maximum number of repeated transmissions.

[0130] Message 2 (Msg2): After receiving the preamble, the network device allocates the time-frequency domain resources of Msg2 and the scheduling information of Msg3 to the terminal. Msg2 is also called random access response (RAR) information. The RAR includes the scheduling information of Msg3, namely, the RAR UL grant information.

[0131] Message 3 (Msg3): Msg3 is sent in the time-frequency resources specified by Msg2, and Msg3 can be carried by the physical uplink shared channel (PUSCH).

[0132] Message 4 (Msg4): Msg4 is mainly used for conflict resolution. When multiple terminal devices access at the same time, it is used to determine which terminal device is selected for access in this random access.

[0133] 2 Physical random access channel (PRACH): can be used to carry preamble sequences. PRACH resources may include time-frequency resources in PRACH and / or code resources carried on PRACH, such as preamble sequences.

[0134] 3. Synchronization broadcast block (synchronization signal and PBCH block, SSB): SSB is one of the important pilot channels used in 5G, which can be used for UE to access the cell, such as cell search, beam measurement, beam selection and beam recovery. In 5G, SSB includes synchronization signals and broadcast signals. The specific synchronization signals include primary synchronization signal (PSS) and secondary synchronization signal (SSS); broadcast signals include PBCH data and PBCH DMRS signals.

[0135] During the random access process, assuming that the terminal device only uses one RO to send the preamble, considering that there is a long distance between the terminal device and the network device, and / or the surrounding environment is not conducive to millimeter wave transmission, the preamble power received by the network device is very likely to be less than the expected value of the network device, which causes the terminal device to be unable to reliably access the network.

[0136] Currently, network equipment can improve the receiving power of the preamble of the network equipment by configuring the same number of RO resources for repeatedly sending preambles for SSBs, and allowing terminal devices to repeatedly send preambles on the RO resources for repeatedly sending preambles corresponding to the selected SSBs in a manner less than or equal to the maximum number of repeated transmissions, thereby improving coverage capabilities.

[0137] The number of repetitions of the preamble configured by the network device for the terminal device is one or more of {2, 4, 8}. It should be understood that the number of repetitions in the present application may also be referred to as a repetition level or a repetition level.

[0138] As an example, when the network device configures the number of repetitions of sending preamble to a terminal device to be {2}, the terminal device can repeatedly send the preamble to the network device twice on two ROs corresponding to the same SSB; when the network device configures the number of repetitions of sending preamble to a terminal device to be {4}, the terminal device can repeatedly send the preamble to the network device four times on four ROs corresponding to the same SSB; when the network device configures the number of repetitions of sending preamble to a terminal device to be {8}, the terminal device can repeatedly send the preamble to the network device eight times on eight ROs corresponding to the same SSB.

[0139] In one possible implementation, in uplink transmission of a terminal device, the terminal device can achieve better user experience and coverage performance through uplink power control technology.

[0140] As an example, suppose Figure 1 The distance between the first terminal device 12 and the network device 11 is relatively close, and the distance between the second terminal device 13 and the network device 11 is relatively far. That is, it can be understood that the first terminal device 12 is a central user of the network device 11. The closer the distance between the central user and the network device 11, the smaller the path loss of the uplink transmission. The second terminal device 13 is an edge user of the network device 11. The distance between the edge user and the network device 11 is relatively far, and the path loss of the uplink transmission is relatively large.

[0141] In order to provide edge users with a better user experience, the terminal devices corresponding to edge users need to use a higher transmission power than the terminal devices corresponding to central users to transmit uplink data (such as preamble). This will compensate for the path loss caused by long-distance transmission of the terminal devices corresponding to edge users, so that the terminal devices corresponding to edge users have better transmission performance, that is, better transmission rate.

[0142] In specific operations, the power used by the terminal device for uplink transmission has a restriction condition, that is, the transmission power of the terminal device cannot be higher than the maximum output power (MOP). Generally, the maximum transmission power of the terminal device of power class 3 (PC3) specified in the existing NR standard is 23 decibel relative to one milliwatt (dBm).

[0143] In another possible implementation, the terminal device can determine the transmit power of the terminal device for a single preamble transmission based on the maximum transmit power configured in the cell where the terminal device is located and the power required by the network device to decode the preamble. The preamble is carried on the PRACH, and the transmit power of the terminal device for a single preamble transmission can also be called the transmit power of the terminal device for a single PRACH transmission.

[0144] As an example, in the NR power control technical solution, assuming that the terminal device independently sends a preamble through a certain beam, the transmission power of the terminal device for a single transmission of the preamble is:

[0145] P PRACH =min{P CMAX,c(i) , PRACH_RECEIVED_TARGET_POWER(single)+PL c}(dBm) (1)

[0146] Among them, P CMAX,c(i) The maximum transmit power configured for the terminal device in cell c is usually a value range of the maximum transmit power configured for the terminal device, and the terminal device selects any value from the value range, such as P CMAX,c(i) =23dBm. The i in c(i) represents the number of times the terminal device sends PRACH, that is, the number of times the i-th transmission is sent. PRACH_RECEIVED_TARGET_POWER (single) is the target received power value of a single preamble, or it can also be called the target power threshold required by the network device to decode the preamble. PL cIt is a path loss estimation, which is calculated by the terminal device based on the reference signal received power (RSRP) of the downlink SSB signal. The terminal device compares the RSRP received on the downlink channel with the known RSRP (broadcast by the network device), and then filters to obtain the estimated value of the path loss PL c The known RSRP represents the transmission power of the reference signal or the received power in the absence of path loss. The estimated value of path loss PL c It can be determined by the difference between the RSRP received by the terminal device using the downlink channel and the known RSRP.

[0147] It should be understood that the calculation of PRACH_RECEIVED_TARGET_POWER (single) is as follows:

[0148] PRACH_RECEIVED_TARGET_POWER(single)=preambleInitialReceivedTargetPower+

[0149] DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER–1)×

[0150] PREAMBLE_POWER_RAMPING_STEP+POWER_OFFSET_2STEP_RA (2)

[0151] In formula (2), preambleInitialReceivedTargetPower is the target received power value of a single preamble expected by the network device notified to the terminal device by the network device, DELTA_PREAMBLE is a parameter configured by the network device; PREAMBLE_POWER_RAMPING_COUNTER is a counter of the number of preamble attempts sent; PREAMBLE_POWER_RAMPING_STEP is the power increase step configured by the network device; POWER_OFFSET_2STEP_RA is a unique parameter configured by the network device for two-step RACH.

[0152] It should be understood that currently NR only has the power of a single PRACH transmission. The transmit power of a single PRACH transmission in PRACH repeated transmission can be directly calculated by the power control formula of NR PRACH single transmission, that is, the actual transmit power of a preamble transmission in PRACH repeated transmission is calculated by the single target received power of NR PRACH and the measured path loss.

[0153] It can be seen that in the NR power control scheme, when the actual number of repeated transmissions of the terminal device is less than a certain number of repetitions determined by the terminal device from the set of repeated transmissions configured by the base station based on the comparison result of the RSRP of the SSB signal and the RSRP threshold configured by the network device, the total received power of the preamble receiving sequence at the network device may be less than the target received power, thereby reducing the detection performance of the preamble.

[0154] In another possible implementation manner, the power of PRACH repetition transmission may also be determined by a power control method of multiple preamble repetition transmissions of enhanced machine-type communication (eMTC).

[0155] As an example, in the eMTC power control technical solution, the power control formula and calculation process of the eMTC preamble repeated transmission can be divided into three steps, as shown below:

[0156] Step 1: When the preamble is sent repeatedly, the total target receiving power of the network device

[0157] PRACH_RECEIVED_TARGET_POWER(total)=preambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER–1)×powerRampingStep (3)

[0158] In formula (3), PREAMBLE_RECEIVED_TARGET_POWER(total) is the target receive power value of the receiving end (network device), preambleInitialReceivedTargetPower is the initial receive power value of a preamble expected by a network device notified by the network device to the terminal device, PREAMBLE_TRANSMISSION_COUNTER is the total number of times the preamble is sent on the current terminal device (the total number is the number of failures of the terminal device to send the preamble, not the number of repetitions of sending the preamble), and powerRampingStep is the step value of the power increase of the preamble sent by the terminal device after the network device fails to detect it.

[0159] Step 2: When a single preamble is sent, the target receiving power of the network device corresponding to the single transmission preamble

[0160] PRACH_RECEIVED_TARGET_POWER (single) = PRACH_RECEIVED_TARGET_POWER (total) -10*log10 (numRepetitionPerPreambleAttempt) (4)

[0161] In formula (4), numRepetitionPerPreambleAttempt is the number of times the terminal device selects the preamble configuration configured by the network device to be repeatedly sent.

[0162] Step 3: The actual transmission power of the terminal device when sending a single preamble

[0163] P PRACH =min{P CMAX,c(i) , PRACH_RECEIVED_TARGET_POWER(single)+PL c} (5)

[0164] It should be understood that the parameters in formula (5) are similar to those in the above formula (1). For details, please refer to the description in the above formula (1).

[0165] In eMTC, the terminal device first determines the total target receiving power of the network device corresponding to the number of times the preamble is repeated according to step 1, and then determines the target receiving power of the network device corresponding to a single preamble according to the total target receiving power. Finally, the actual transmission power of a single PRACH of the terminal device is determined according to the target receiving power of a single preamble.

[0166] like Figure 3 As shown in the figure, assuming that the network device configures the terminal device to repeat sending the preamble 4 times, and the terminal device actually repeats sending the preamble 3 times, the terminal device calculates the sending power of a single preamble according to the target receiving power of 4 times of repeated sending configured by the network device, and the terminal device actually only repeats sending the preamble 3 times to the network device, which will cause the receiving power of the network device combined preamble to decrease, and fail to reach the target receiving power configured by the network device.

[0167] It can be seen that in the eMTC power control scheme, when the actual number of repetitions of the preamble of the terminal device is less than the number of repetitions configured by the network device, the total receiving power of the preamble receiving sequence on the network device side will be reduced, resulting in the receiving power of the network device combined with the preamble failing to reach the total target receiving power of the network device, thereby reducing the detection performance of the network device for the preamble.

[0168] According to the above-mentioned examples of the terminal device determining the transmission power of the preamble, the target receiving power of the network device is set according to the number of repeated transmissions configured by the network device. Therefore, when the actual number of repeated transmissions of the terminal device is less than the number of repeated transmissions configured by the network device, it may cause the total receiving power of the preamble merged at the network device to be less than the target receiving power, resulting in a decrease in the detection performance of the preamble of the network device.

[0169] Based on the above problems, when the number of times the terminal device actually repeats sending the preamble is different from the number of times the network device configures the terminal device to repeat sending the preamble, how to control the sending power of the terminal device for a single transmission of the preamble so that the actual receiving power of the network device receiving the preamble is as close as possible to or exceeds the target receiving power configured by the network device is a current research hotspot.

[0170] Based on the above technical problems, the present application provides a power control method and a communication device. When the number of times the terminal device repeatedly sends the preamble is less than the number of repeated transmissions configured by the network device, the method can greatly improve the total power of the network device actually receiving the preamble sequence of the terminal device, thereby further ensuring the detection performance of the network device on the preamble of the terminal device.

[0171] The following will be combined Figure 4 A schematic flow chart of a power control method is shown in the figure, and the method provided in the present application is exemplarily introduced.

[0172] 401. The network device sends instruction information to the terminal device.

[0173] Correspondingly, the terminal device receives the indication information sent from the network device.

[0174] It should be understood that the indication information is used to indicate the number of repetitions of the preamble sent by the terminal device on the PRACH resource, and the target receiving power configured by the network device corresponding to the number of repetitions. The number of repetitions includes the second number of repetitions, and at least one target receiving power corresponding to the second number of repetitions.

[0175] It should be understood that when the second number of repeated transmissions corresponds to a target received power, the second number of repeated transmissions corresponds to the second target received power.

[0176] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {2,4}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {2}, the target receiving power corresponding to the network device is P2; the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {4}, the target receiving power corresponding to the network device is P4. That is, when the second number of repetitions is {2}, the second target receiving power is P2; when the second number of repetitions is {4}, the second target receiving power is P4.

[0177] Among them, P2 can be the total target received power corresponding to the second repeated transmission number of {2}; P4 can be the total target received power corresponding to the second repeated transmission number of {4}; or, P2 can be the single target received power corresponding to the second repeated transmission number of {2}; P4 can be the single target received power corresponding to the second repeated transmission number of {4}.

[0178] It should also be understood that when the second number of repeated transmissions corresponds to multiple target received powers, that is, the second number of repeated transmissions corresponds to multiple target received powers, the multiple target received powers include the second target received power.

[0179] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {4, 8}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {4}, the corresponding target receiving power of the network device is P3, P4; the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {8}, the corresponding target receiving power of the network device is P5, P6, P7, P8. That is, when the second number of repetitions is {4}, the corresponding multiple target receiving powers are P3 and P4, wherein P4 is the second target receiving power; when the second number of repetitions is {8}, the corresponding multiple target receiving powers are P5, P6, P7, P8, wherein P8 is the second target receiving power.

[0180] Among them, P3 and P4 can be the total target received power corresponding to the second repeated transmission number of {4}; P5, P6, P7, P8 can be the total target received power corresponding to the second repeated transmission number of {8}; or, P3 and P4 can be the single target received power corresponding to the second repeated transmission number of {4}; P5, P6, P7, P8 can be the single target received power corresponding to the second repeated transmission number of {8}.

[0181] It should be understood that the indication information is used to indicate the number of repeated transmissions and the target receiving power corresponding to the number of repeated transmissions. The target receiving power may be the total target receiving power corresponding to the number of repeated transmissions configured by the network device, or may be the target receiving power corresponding to a single transmission preamble corresponding to the number of repeated transmissions configured by the network device.

[0182] For different situations in which the target receiving power corresponding to the number of repeated transmissions in the indication information is the total target receiving power of the transmitted preamble (or called the total target receiving power) or the target receiving power of a single transmission preamble (or called the single target receiving power), the terminal device determines the actual transmission power according to the indication information. Please refer to the specific descriptions in the following situations 1 and 2 for a detailed introduction.

[0183] It should be noted that the "{}" symbol in "number of repetitions {}" in the embodiment of the present application is to more clearly indicate the specific number of repetitions. For example, the first number of repetitions is {3}, indicating that the actual number of repetitions of the terminal device is 3 times; the second number of repetitions is {4}, indicating that the number of repetitions configured by the network device is 4 times; the third number of repetitions is {2, 4}, indicating that the number of repetitions configured by the network device is 2 times and 4 times.

[0184] 402. The terminal device sends a preamble to the network device.

[0185] Accordingly, the network device receives the preamble sent from the terminal device.

[0186] Optionally, before step 402, or in step 401, the terminal device may also receive an SSB signal sent from the network device, and the terminal device determines the beam for sending the preamble and the beam for receiving the preamble by the network device according to the SSB signal. The terminal device determines the transmission power of a single transmission of the preamble, and sends the preamble to the network device on a PRACH resource associated with the network device receiving beam determined according to the SSB signal.

[0187] After receiving the indication information from the network device, the terminal device determines the actual number of repetitions of sending the preamble (e.g., the first number of repetitions), and determines the first target reception power corresponding to the first number of repetitions according to the second number of repetitions and at least one target reception power in the indication information, and determines the target reception power of the single transmission of the preamble according to the first target reception power. The terminal device determines the transmission power of the single transmission of the preamble according to the target reception power of the single transmission of the preamble, and sends the preamble to the network device according to the first number of repetitions and the transmission power.

[0188] When at least one target received power corresponding to the second number of repeated transmissions in the indication information is the total target received power configured by the network device, or when at least one target received power corresponding to the second number of repeated transmissions in the indication information is a single target received power configured by the network device, the terminal device determines the actual transmission power according to the indication information, including the following two cases:

[0189] Case 1

[0190] At least one target received power corresponding to the second number of repeated transmissions in the indication information is the total target received power configured for the network device, the first target received power is the total target received power configured for the network device, and the terminal device determines the target received power of a single transmission preamble based on the first target received power and the number of repeated transmissions (the first number of repeated transmissions and / or the second number of repeated transmissions). The terminal device determines the actual transmission power based on the target received power of the single transmission preamble.

[0191] Case 2

[0192] At least one target receiving power corresponding to the second number of repeated transmissions in the indication information is a single target receiving power configured by the network device, the first target receiving power is a single target receiving power configured by the network device, and the terminal device determines the actual transmitting power based on the first target receiving power.

[0193] Based on the above situation 1, the first target received power is the total target received power configured / calculated by the network device. The terminal device determines the target received power of a single transmission preamble according to the first target received power and the number of repeated transmissions (the first number of repeated transmissions and / or the second number of repeated transmissions), and determines the actual transmission power according to the target received power of the single transmission preamble, including the following examples:

[0194] Example 1:

[0195] The indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. The at least one target received power includes a second target received power corresponding to the second number of repeated transmissions, and the terminal device determines the first target received power according to the at least one target received power, and determines the target received power of a single transmission preamble according to the first target received power.

[0196] Example 2:

[0197] The indication information includes a second number of repeated transmissions, the second number of repeated transmissions corresponds to at least one target received power, and the at least one target received power includes a second target received power corresponding to the second number of repeated transmissions. The terminal device determines the first target received power based on the at least one target received power. The terminal device determines the target received power of a single transmission preamble based on the first target received power and the first number of repeated transmissions.

[0198] Example 3:

[0199] The indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. The at least one target received power includes a second target received power corresponding to the second number of repeated transmissions. The terminal device determines the first target received power based on the at least one target received power. The terminal device determines the target received power of a single transmission preamble based on the first target received power and the first value.

[0200] For example 1: the indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. The at least one target received power includes a second target received power corresponding to the second number of repeated transmissions, and the terminal device determines a first target received power based on the at least one target received power, and determines a target received power for a single transmission preamble based on the first target received power.

[0201] Wherein, when at least one target received power in the indication information includes one target received power (second target received power), the terminal device determines the first target received power according to the second target received power and its own predefined power threshold / rule; when at least one target received power in the indication information includes at least two target received powers, and the at least two target received powers include the first target received power, the terminal device directly determines the first target received power according to the at least two target received powers; when at least one target received power in the indication information includes at least two target received powers, and the at least two target received powers do not include the first target received power, the terminal device determines the first target received power according to the at least two target received powers and the power threshold. For a specific description of the terminal device determining the first target received power according to at least one target received power in the indication information, please refer to the following method 1 and method 2.

[0202] After the terminal device receives the indication information from the network device, the terminal device can determine the resource location corresponding to the PRACH resource and the actual number of repetitions of the terminal device to repeatedly send the preamble according to the indication information, that is, the first number of repetitions. The terminal device determines the first target receiving power corresponding to the first number of repetitions according to at least one target receiving power corresponding to the number of repetitions of the preamble configured by the network device in the indication information, that is, at least one target receiving power corresponding to the second number of repetitions. The first target receiving power is the first target receiving power determined by the terminal device based on the first number of repetitions and at least one target receiving power when the terminal device determines that the actual number of repetitions of the preamble is the first number of repetitions. The first target receiving power is the total target receiving power corresponding to the first number of repetitions. The terminal device determines the transmission power of the preamble according to the first target receiving power. The terminal device sends the preamble to the network device according to the first number of repetitions and the transmission power. Among them, the transmission power is the transmission power of the terminal device sending the preamble once.

[0203] It should be understood that the second number of repeated transmissions is greater than the first number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions closest to the first number of repeated transmissions in the indication information sent by the network device to the terminal device.

[0204] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {2, 4}. The first number of repetitions determined by the terminal device according to the indication information is {3}, and the terminal device selects a number of repetitions greater than the first number of repetitions and closest to the first number of repetitions in the indication information, that is, the terminal device selects the second number of repetitions as {4} according to {2, 4}. The terminal device determines the first target receiving power corresponding to the first number of repetitions {3} based on at least two target receiving powers corresponding to the second number of repetitions {4}.

[0205] The terminal device determines the first number of repeated transmissions {3} according to the indication information, the indication information includes the RACH resource location associated with the SSB, the terminal device determines the SSB sequence number (index) according to the RSRP comparison result of the SSB, the terminal device determines the repetition level (for example, the second number of repeated transmissions is {4}) according to the comparison result between the determined RSRP of the SSB and the threshold configured by the network device, and the terminal device determines the corresponding RACH resource location according to the determined SSB sequence number (index) and the repetition level. Since there may be an unavailable RO at the resource location, the actual number of transmissions of the terminal device is {3}.

[0206] The following will use method 1 and method 2, combined with the above example 1, to explain in detail Figure 4 The method shown.

[0207] Method 1

[0208] The network device sends indication information to the terminal device, wherein the indication information includes at least two target receiving powers corresponding to the second number of repeated transmissions, and the at least two target receiving powers include the first target receiving power.

[0209] It should be understood that each number of repetitions configured by the network device for the terminal device is associated with at least two target received powers. That is, the second number of repetitions corresponds to at least two target received powers. The terminal device determines the first target received power based on the first number of repetitions and the at least two target received powers, and determines the transmission power of a single preamble (e.g., the third target received power) based on the first target received power.

[0210] In one possible implementation, each of the at least two target receiving powers corresponds to an actual number of repeated transmissions of the terminal device, and the at least two target receiving powers include a first target receiving power corresponding to a first number of repeated transmissions.

[0211] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {4}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {4}, the target receiving power corresponding to the network device is P4 and P3. Wherein, when the second number of repetitions is {4}, at least two target receiving powers corresponding to the second number of repetitions are P4 and P3. Assume that when the actual number of repetitions determined by the terminal device according to the indication information, that is, the first number of repetitions is {3}, the terminal device determines that the first number of repetitions {3} is less than the second number of repetitions {4} configured by the network device, and the target receiving powers corresponding to the second number of repetitions {4} configured in the indication information include P3 and P4. The terminal device determines the first target receiving power to be P3 based on the first number of repetitions {3} and the target receiving powers P3 and P4. The terminal device determines the sending power of a single preamble based on the first target receiving power P3.

[0212] It should be understood that the terminal device determines that the number of repeated transmissions corresponding to P3 is {3} and the number of repeated transmissions corresponding to P4 is {4} according to the specific positions of the fields where P3 and P4 are located in the indication information. P3 and P4 are the total target received powers of the network devices corresponding to the number of repeated transmissions. The relationship between P3 and P4 is not specifically limited in this application, for example, P3 is greater than or equal to P4, or P3 is less than or equal to P4.

[0213] In a possible implementation, the at least two target received powers do not include the first target received power corresponding to the first number of repeated transmissions. The terminal device is predefined / preconfigured with the corresponding relationship between the at least two target received powers and the actual number of repeated transmissions.

[0214] As an example, assuming that the indication information is used to indicate that the second number of repeated transmissions of the preamble by the terminal device is {8}, wherein the indication information is also used to indicate that the number of repeated transmissions of the preamble by the terminal device is {8}, the target receiving power corresponding to the network device is at least two of P8, P7, P6 and P5.

[0215] Assume that the second number of repetitions {8} in the indication information corresponds to four target receiving powers P8, P7, P6 and P5, and the terminal device itself is predefined / preconfigured that P8, P7, P6 and P5 correspond to numbers of repetitions of 8, 7, 6 and 5 respectively; or, the second number of repetitions {8} may indicate that it corresponds to two target receiving powers P8 and P7, and the terminal device is predefined that P8 and P7 correspond to numbers of repetitions of 8 and 7 respectively; or, the second number of repetitions {8} may indicate that it corresponds to two target receiving powers P8 and P5, and the terminal device is predefined that P8 and P7 correspond to numbers of repetitions of 8 and 5 respectively; or, the second number of repetitions {8} may indicate that it corresponds to two target receiving powers P8 and P5, and the terminal device is predefined that P8 corresponds to a number of repetitions of 8, and P5 corresponds to a number of repetitions of 6 and 5.

[0216] In one possible implementation, the at least two target received powers do not include the first target received power corresponding to the first number of repeated transmissions. Each of the at least two target received powers corresponds to the difference (or interval) between the first number of repeated transmissions and the second number of repeated transmissions. The indication information includes a corresponding relationship between the difference between the first number of repeated transmissions and the second number of repeated transmissions and the at least two target received powers.

[0217] As an example, assuming that the indication information is used to indicate that the second number of repeated transmissions of the preamble by the terminal device is {8}, wherein the indication information is also used to indicate that the number of repeated transmissions of the preamble by the terminal device is {8}, the target receiving power corresponding to the network device is at least two of P8, P7, P6 and P5.

[0218] For example, the indication information includes a first threshold value, which is the difference between the first number of repeated transmissions and the second number of repeated transmissions. Assuming that the first threshold value is 1, the terminal device determines that the first target received power corresponding to the first threshold value of 1 is P7, which means that P7 of at least two target received powers is the target received power with the difference of 1 between the first number of repeated transmissions and the second number of repeated transmissions, that is, the first target received power corresponding to the first number of repeated transmissions {7} is P7; assuming that the first threshold value is 2, the terminal device determines that the first target received power corresponding to the first threshold value of 2 is P6, which means that P6 of at least two target received powers is the target received power with the difference of 2 between the first number of repeated transmissions and the second number of repeated transmissions, that is, the first target received power corresponding to the first number of repeated transmissions {6} is P6; assuming that the first threshold value is 3, the terminal device determines that the first target received power corresponding to the first threshold value of 3 is P5, which means that P5 of at least two target received powers is the target received power with the difference of 3 between the first number of repeated transmissions and the second number of repeated transmissions, that is, the first target received power corresponding to the first number of repeated transmissions {5} is P5.

[0219] Assume that the terminal device determines that the first number of repeated transmissions is {6}, and the difference between the first number of repeated transmissions {6} and the second number of repeated transmissions {8} in the indication information is 2. The terminal device selects P6 as the first target received power according to at least two target received powers P8, P7, P6 and P5 corresponding to the number of repeated transmissions {8} in the indication information. The terminal device determines the transmission power of the single repetition of the preamble based on P6 and the first number of repeated transmissions.

[0220] It should be understood that the first threshold may be predefined or preconfigured for the terminal device, and no indication information is required for further indication. The terminal device may directly determine the first target received power among the at least two target received powers based on its own predefined first threshold and at least two target received powers.

[0221] After receiving the indication information, the terminal device determines the first number of repeated transmissions and the first target receiving power according to the indication information, and determines the transmission power according to the first target receiving power. The terminal device sends a preamble to the network device according to the first number of repeated transmissions and the transmission power.

[0222] As an example, assume that the terminal device determines that the first number of repeated transmissions is {3} and the first target received power is P3 according to the indication information. The terminal device further determines the transmission power of a single preamble according to the first target received power P3, that is, the fourth target received power (for example, P3'), the terminal device determines the transmission power according to P3', and sends the preamble to the network device according to the first number of repeated transmissions {3} and the transmission power P3', wherein the number of repeated transmissions of the preamble sent by the terminal device to the network device according to the transmission power P3' is {3}. Alternatively, assume that the terminal device determines that the first number of repeated transmissions is {6} and the first target received power is P6 according to the indication information. The terminal device further determines the transmission power of a single preamble according to the first target received power P6, that is, the fourth target received power (for example, P6'), the terminal device determines the transmission power according to P6', and sends the preamble to the network device according to the first number of repeated transmissions {6} and the transmission power P6'.

[0223] Among them, the first target receiving power is used as the total target receiving power of the network device, and the terminal device determines the sending power of a single preamble according to the first target receiving power. The specific calculation process is shown in the above formulas (1) to (5), which will not be repeated here.

[0224] Method 2

[0225] The network device sends indication information to the terminal device, wherein the indication information includes at least one target receiving power corresponding to the second number of repeated transmissions, and the at least one target receiving power does not include the first target receiving power.

[0226] Optionally, the indication information may include at least one second threshold value, and the second threshold value is used for the terminal device to determine the first target received power according to the at least one target received power. The terminal device determines the first target received power corresponding to the first number of repeated transmissions according to the second target received power and the second threshold value.

[0227] For example, the terminal device determines a third threshold value based on the at least one second threshold value and the first number of repeated transmissions, where the third threshold value is a change value / offset value of the first target received power relative to the second target received power. The terminal device determines the first target received power based on the third threshold value and at least one target received power (e.g., the second target received power).

[0228] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {4}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {4}, the target receiving power corresponding to the network device is P4. The indication information includes a second threshold value, and the second threshold value is p1. Assume that when the actual number of repetitions of the terminal device is {3}, the terminal device determines that the first number of repetitions {3} is less than the second number of repetitions {4}, and the terminal device determines the third threshold value based on the second threshold value p1 and the first number of repetitions {3}. The third threshold value is p1, that is, the third threshold value is the same as the second threshold value. The terminal device determines the first target receiving power corresponding to the first number of repetitions {3} based on the third threshold value and the second target receiving power P4.

[0229] Assume that p1 is a positive number, and the total target received power corresponding to the first number of repeated transmissions {3} is less than the total target received power corresponding to the second number of repeated transmissions {4}, that is, the first target received power is less than the second target received power. The terminal device determines the first target received power based on P4 and p1, that is, the first target received power = P4-p1. Assume that the total target received power corresponding to the first number of repeated transmissions {3} is greater than the total target received power corresponding to the second number of repeated transmissions {4}, that is, the first target received power is greater than the second target received power. The terminal device determines the first target received power based on P4 and p1, that is, the first target received power = P4+p1.

[0230] Assume that p1 is a negative number, and the total target received power corresponding to the first number of repeated transmissions {3} is less than the total target received power corresponding to the second number of repeated transmissions {4}, that is, the first target received power is less than the second target received power. The terminal device determines the first target received power based on P4 and p1, that is, the first target received power = P4 + p1. Assume that the total target received power corresponding to the first number of repeated transmissions {3} is greater than the total target received power corresponding to the second number of repeated transmissions {4}, that is, the first target received power is greater than the second target received power. The terminal device determines the first target received power based on P4 and p1, that is, the first target received power = P4-p1.

[0231] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {8}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {8}, the target receiving power corresponding to the network device is P8. The indication information includes a second threshold value, and the second threshold value is p1, p2, and p3. Among them, p1 can correspond to an actual number of repetitions of {5}, p2 can correspond to an actual number of repetitions of {6}, and p3 can correspond to an actual number of repetitions of {7}. Assume that when the actual number of repetitions of the terminal device is {5}, the terminal device determines that the first number of repetitions {5} is less than the second number of repetitions {8}, and the terminal device can determine the third threshold value based on the second threshold value and the first number of repetitions {5}, and the third threshold value is p1. The terminal device determines the first target receiving power corresponding to the first number of repetitions {5} based on the third threshold value p1 and the second target receiving power P8.

[0232] Assume that the total target received power corresponding to the first number of repeated transmissions {5} is less than the total target received power corresponding to the second number of repeated transmissions {8}, that is, the first target received power is less than the second target received power. The terminal device determines the first target received power based on P8 and p1, that is, the first target received power = P8-p1. Assume that the total target received power corresponding to the first number of repeated transmissions {5} is greater than the total target received power corresponding to the second number of repeated transmissions {8}, that is, the first target received power is greater than the second target received power. The terminal device determines the first target received power based on P8 and p1, that is, the first target received power = P8+p1.

[0233] It should be understood that the first target received power may also be determined by other algorithms or rules based on the second target received power and the second threshold, and this application does not limit this.

[0234] It should be understood that the terminal device can determine multiple power offset values ​​based on the second threshold and multiple predefined offset values, and the multiple power offset values ​​can respectively correspond to multiple actual repeated transmission times.

[0235] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {8}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {8}, the target receiving power corresponding to the network device is P8. The indication information includes a second threshold value, and the second threshold value is p1. Among them, the terminal device can determine multiple target receiving power offset values ​​according to multiple predefined values ​​and the second threshold value p1. Assume that the terminal device predefines 3 values, namely S1, S2 and S3. Among them, S1 can correspond to the first number of repetitions of the terminal device {5}, S2 can correspond to the first number of repetitions of the terminal device {6}; S3 can correspond to the first number of repetitions of the terminal device {7}. When the terminal device determines that the first number of repetitions is {5} according to the indication information, the terminal device determines the third threshold value as S1 according to the second threshold value and the first number of repetitions. The terminal device determines the first target receiving power according to S1 and the second target receiving power P8. When the first number of repeated transmissions determined by the terminal device is {6}, the terminal device determines the third threshold value as S2 based on the second threshold value and the first number of repeated transmissions. The terminal device determines the first target received power based on S2 and the second target received power P8. When the first number of repeated transmissions determined by the terminal device is {7}, the terminal device determines the third threshold value as S3 based on the second threshold value and the first number of repeated transmissions. The terminal device determines the first target received power based on S3 and the second target received power P8.

[0236] For example, the first target received power is determined based on the difference between the second target received power and the third threshold, or the first target received power is determined based on the second target received power and the third threshold. It can also be determined by other algorithms, which is not limited in this application.

[0237] It should be understood that the at least one target received power includes the second target received power and does not include the first target received power. The terminal device may determine the first target received power based on the second target received power and at least one predefined third threshold. The at least one third threshold is predefined or preconfigured by the terminal device.

[0238] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {8}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {8}, the second target receiving power corresponding to the network device is P8. Assume that the terminal device predefines the third threshold as a1, a2 and a3, and the third threshold is a power offset value. Among them, a1 corresponds to the first number of repetitions of the terminal device {5}, a2 corresponds to the first number of repetitions of the terminal device {6}; a3 corresponds to the first number of repetitions of the terminal device {7}.

[0239] When the terminal device determines that the first number of repeated transmissions is {5} according to the indication information, the terminal device determines the first target received power according to the third threshold and the second target received power, assuming that the total target received power corresponding to the first number of repeated transmissions {5} is less than the total target received power corresponding to the second number of repeated transmissions {8}, that is, the first target received power is less than the second target received power. The terminal device determines the first target received power according to P8 and a1, that is, the first target received power = P8-a1. Assume that the total target received power corresponding to the first number of repeated transmissions {5} is greater than the total target received power corresponding to the second number of repeated transmissions {8}, that is, the first target received power is greater than the second target received power. The terminal device determines the first target received power according to P8 and a1, that is, the first target received power = P8+a1.

[0240] For example, the first target received power is determined according to the difference between the second target received power and the third threshold, or the first target received power is determined according to the sum of the second target received power and the third threshold. The terminal device can also determine it through other algorithms, which is not limited in this application.

[0241] It should be understood that at least one target received power includes the second target received power and does not include the first target received power. The terminal device can determine the first target received power based on the second target received power and a predefined calculation rule / method. Wherein, the calculation rule / method is predefined / preconfigured for the terminal device, and the specific rules and methods are not specifically limited in this application.

[0242] After receiving the indication information, the terminal device determines the first number of repeated transmissions and the first target receiving power according to the indication information, and sends a preamble to the network device according to the first number of repeated transmissions and the transmission power.

[0243] As an example, assuming that the smaller the number of repeated transmissions, the smaller the corresponding target receiving power, that is, the first number of repeated transmissions is {5}, the second number of repeated transmissions is {8}, and the first target receiving power is less than the second target receiving power, how does the terminal device determine the transmission power according to the first target receiving power. For example, the terminal device determines that the first number of repeated transmissions is {5} and the first target receiving power is P8-p1 according to the indication information. The terminal device further determines the transmission power of a single preamble (for example, (P8-p1)') according to the first target receiving power P8-p1, and the terminal device sends the preamble to the network device according to the transmission power (P8-p1)'. Among them, the terminal device sends the preamble to the network device according to the transmission power (P8-p1)', and the number of times the terminal device repeatedly sends the preamble to the network device is {5}. Or, for example, the terminal device determines that the first number of repeated transmissions is {6} and the first target receiving power is P8-S2 according to the indication information. The terminal device further determines the transmission power of a single preamble (for example, (P8-S2)') based on the first target receiving power P8-S2, and the terminal device sends the preamble to the network device based on the transmission power (P8-S2)', wherein the number of repeated transmissions of the preamble sent by the terminal device to the network device according to the transmission power (P8-S2)' is {6}. Alternatively, for example, the terminal device determines that the second number of repeated transmissions is {8} and the second target receiving power is P8 based on the indication information. The terminal device determines that the total target receiving power corresponding to the number of repeated transmissions {5} is P8-p1 based on the second threshold value p1 in the indication information. The terminal device determines that the first number of repeated transmissions is {6} based on the indication information, and the terminal device further determines the first target receiving power based on the predefined third threshold value (S1, S2, S3) and the total target receiving power P8-p1 corresponding to the number of repeated transmissions {5}, for example, the first target receiving power is P8-p1+S2. The terminal device further determines the transmission power of a single preamble (for example, (P8-p1+S2)') based on the first target receiving power P8-p1+S2, and the terminal device sends the preamble to the network device according to the transmission power (P8-p1+S2)', wherein the number of repeated transmissions of the preamble sent by the terminal device to the network device according to the transmission power (P8-p1+S2)' is {6}.

[0244] For the above-mentioned method 1 and method 2, the indication information may include a first threshold value and a second threshold value, and the first threshold value and the second threshold value are used by the terminal device to determine the first target received power. Among them, the first threshold value and the second threshold value may also be predefined or preconfigured by the terminal device, and no indication information is required to be sent. The terminal device may determine the first target received power directly based on the pre-stored threshold value and the second target received power in the indication information, or the terminal device itself predefines a method / rule for calculating the first target received power, and determines the first target received power according to the indication information, which is not limited in this application.

[0245] For Example 2: The indication information includes a second number of repeated transmissions, the second number of repeated transmissions corresponds to at least one target received power, and the at least one target received power includes a second target received power corresponding to the second number of repeated transmissions. The terminal device determines the first target received power based on the at least one target received power and the first number of repeated transmissions. The terminal device determines the target received power (e.g., the third target received power) of a single transmission preamble based on the first target received power and the first number of repeated transmissions.

[0246] Optionally, the first target received power is the total target received power corresponding to the first number of repeated transmissions, and the terminal device can determine the first target received power based on the first target received power and at least one target received power in the indication information. The terminal device determines the first target received power based on at least one target received power corresponding to the second number of repeated transmissions in the indication information, which is similar to the description in Method 1 and Method 2 in Example 1 above, and please refer to the above description for details.

[0247] Optionally, the first target received power is the total target received power corresponding to the first number of repeated transmissions, and the terminal device can determine the first target received power based on the second target received power. The terminal device can use the second target received power corresponding to the second number of repeated transmissions as the first target received power corresponding to the first number of repeated transmissions, that is, the first target received power is equal to the second target received power.

[0248] In combination with Example 2, the following will introduce in detail the specific process of the terminal device determining the target receiving power and transmitting power of a single transmission preamble based on the first target receiving power and the first number of repeated transmissions through Method 3 and Method 4.

[0249] Method 3

[0250] When the terminal device determines the transmission power of a single preamble transmission according to the first target reception power, the terminal device may determine the target reception power of the single preamble transmission by the terminal device according to the first target reception power and the first number of repeated transmissions.

[0251] Among them, the terminal device can directly use the second target receiving power as the first target receiving power, that is, the first target receiving power is equal to the second target receiving power. The terminal device determines the target receiving power of a single transmission preamble based on the second target receiving power and the first number of repeated transmissions. For example, the second target receiving power in the indication information is {8}, and the total target receiving power of the network device corresponding to the second number of repeated transmissions: the second target receiving power is P8. The terminal device determines that the first number of repeated transmissions is {6} according to the indication information, and the terminal device uses P8 as the first target receiving power, and determines the target receiving power of a single transmission preamble based on the first target receiving power and the first number of repeated transmissions, that is, the target receiving power of a single transmission preamble is determined based on P8 and {6}. For example, assuming that P8 takes a linear value, the target receiving power of a single transmission preamble = P8 / 6; assuming that P8 takes a logarithmic value, the target receiving power of a single transmission preamble = P8-10log10(6).

[0252] Method 4

[0253] When the terminal device determines the transmission power of a single preamble transmission according to the first target reception power, the terminal device may determine the target reception power of a single preamble transmission according to the first target reception power and the first number of repeated transmissions. The terminal device determines the transmission power of a single preamble transmission according to the target reception power of a single preamble transmission.

[0254] Optionally, the terminal device calculates the transmission power of a single preamble transmission using an eMTC power calculation method, as follows:

[0255] First, the terminal device determines the total target received power PRACH_RECEIVED_TARGET_POWER (total) corresponding to the network device according to formula (3) in step 1 of the eMTC power control technical solution.

[0256] Secondly, when the terminal device determines the target receiving power of a single preamble according to the total target receiving power, the following formula (6) is used:

[0257] PRACH_RECEIVED_TARGET_POWER(single)=PRACH_RECEIVED_TARGET_POWER(total)-10*log10(first repeated transmission times) (6)

[0258] In formula (6), the numRepetitionPerPreambleAttempt parameter in formula (4) in step 2 of the above eMTC power control technical solution is replaced with the number of times the terminal device actually repeats the transmission: the first number of repeated transmissions. When determining the target receiving power of a single preamble of the terminal device, the target receiving power of a single preamble transmission of the terminal device is determined according to the number of repeated transmissions of the preamble actually sent by the terminal device.

[0259] Finally, the terminal device determines the transmission power of the single preamble transmission according to the target receiving power of the single preamble transmission. The specific calculation method can be referred to the formula (5) in the above step 3.

[0260] It should be understood that when the terminal device determines the target receiving power of a single preamble of the network device, it does not use the number of preamble repetitions configured by the network device (i.e., the second number of repetitions), but uses the actual number of repetitions of the terminal device (i.e., the first number of repetitions) to determine the target receiving power of a single preamble of the network device. It can be seen that when the first number of repetitions is less than the second number of repetitions, the above calculation method can improve the receiving power of the preamble actually received by the network device, thereby further ensuring the detection performance of the network device for the preamble.

[0261] It should also be understood that the above-mentioned method 1 and method 2 can be combined with the method in method 4 respectively to further improve the receiving power of the network device actually receiving the preamble and ensure the detection performance of the network device for the preamble.

[0262] As an example, assuming that the first method is combined with the fourth method, in the indication information sent by the network device to the terminal device, the second number of repeated transmissions corresponds to at least two target received powers, wherein the at least two target received powers include the first target received power corresponding to the first number of repeated transmissions.

[0263] For example, when the second repetition number in the indication information is {8}, the target receiving powers corresponding to the second target receiving power are P5, P7 and P8. Among them, the first repetition number corresponding to P5 is {5}, the first repetition number corresponding to P7 is {7}, and the first repetition number corresponding to P8 is {8}.

[0264] When the first number of repeated transmissions determined by the terminal device is {5}, the terminal device can determine the first target receiving power to be P5. The terminal device can use P5 as the total target receiving power of the network device. The terminal device determines the target receiving power of a single preamble of the network device according to the above formula (6), as shown in formula (7):

[0265] PRACH_RECEIVED_TARGET_POWER(single)=P5-10*log10(5) (7)

[0266] After the terminal device determines the target receiving power of a single preamble of the network device according to formula (7), it further determines the transmission power of a single preamble according to the above formula (5).

[0267] When the first number of repeated transmissions determined by the terminal device is {6}, the terminal device determines that there is no target received power corresponding to the first number of repeated transmissions {6} among the multiple target received powers corresponding to the second number of repeated transmissions, and the terminal device can determine the total target received power corresponding to the network device according to formula (3) in step 1 of the above-mentioned eMTC power control technical solution, and further use formula (6) to determine the target received power of a single preamble. The terminal device determines the transmission power of a single preamble according to the first number of repeated transmissions and the target received power of a single preamble. The specific example is similar to the example in the above-mentioned method 4 and will not be repeated here.

[0268] As another example, assuming that the second method is combined with the fourth method, when the indication information sent by the network device to the terminal device includes multiple second thresholds, the second threshold corresponds to the second number of repeated transmissions.

[0269] For example, when the second number of repeated transmissions in the indication information is {8}, the second target receiving power is P8. The second threshold in the indication information includes p1, p2, and p3. Among them, the first number of repeated transmissions corresponding to p1 is {5}, the first number of repeated transmissions corresponding to p2 is {6}, and the first number of repeated transmissions corresponding to p3 is {7}.

[0270] When the first number of repeated transmissions determined by the terminal device is {5}, the terminal device can determine the third threshold value as p1 based on the second threshold value and the first number of repeated transmissions. The terminal device determines the first target receiving power as P8-p1 based on the third threshold value and the second target receiving power. The terminal device uses P8-p1 as the total target receiving power of the network device. The terminal device determines the target receiving power of a single preamble of the network device based on the above formula (6), as shown in formula (8):

[0271] PRACH_RECEIVED_TARGET_POWER(single) =(P8-p1)- 10 * log10(5) (8)

[0272] After the terminal device determines the target receiving power of a single preamble of the network device according to formula (8), it further determines the transmission power of a single preamble according to the above formula (5).

[0273] When the first number of repeated transmissions determined by the terminal device is {6}, there is no power offset value corresponding to the first number of repeated transmissions {6} in the second threshold in the indication information, and the terminal device can determine the total target receiving power corresponding to the network device according to formula (3) in step 1 of the above eMTC power control technical solution, and further determine the target receiving power of a single preamble according to the above formula (6). The terminal device determines the transmission power of a single preamble according to the first number of repeated transmissions and the target receiving power of a single preamble. The details are similar to the example in the above method three and will not be repeated here.

[0274] For example three: the indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. The at least one target received power includes a second target received power corresponding to the second number of repeated transmissions, and the terminal device determines the first target received power based on the at least one target received power and the first number of repeated transmissions. The terminal device determines the target received power of a single transmission preamble based on the first target received power and the first value, wherein the target received power of the single transmission preamble is greater than a third target received power, and the third target received power is the target received power of the single transmission preamble determined based on the first target received power.

[0275] Optionally, the first target received power is the total target received power corresponding to the first number of repeated transmissions, and the terminal device may determine the first target received power according to at least one target received power corresponding to the second number of repeated transmissions in the indication information. For an exemplary description of a terminal device determining the first target received power according to at least one target received power corresponding to the second number of repeated transmissions in the indication information, please refer to the detailed descriptions in Method 1 and Method 2 in Example 1 above.

[0276] Optionally, the first target received power is the total target received power corresponding to the first number of repeated transmissions, and the terminal device can determine the first target received power based on the second target received power. The terminal device can use the second target received power corresponding to the second number of repeated transmissions as the first target received power corresponding to the first number of repeated transmissions, that is, the first target received power is equal to the second target received power.

[0277] In one possible implementation, when the first target received power is the total target received power of the transmission preamble corresponding to the first number of repeated transmissions, determining the target received power of a single transmission preamble according to the first target received power and the first value includes: determining a fourth target received power according to the first target received power and the first value, the fourth target received power being greater than the first target received power. The terminal device determines the target received power of a single transmission preamble according to the fourth target received power and the second number of repeated transmissions.

[0278] Optionally, the terminal device determines the target received power of a single transmission preamble according to the first target received power and the first value, including:

[0279] 1. When the first target received power and the first value are both linear values, the target received power of a single transmission preamble is determined according to the product of the first target received power and the first value, and the first value is a positive number greater than 1; or

[0280] 2. When the first target received power and the first value are both linear values, the target received power of a single transmission preamble is determined according to the sum of the first target received power and the first value, and the first value is a positive number; or

[0281] 3. When the first target received power is a logarithmic value and the first value is a linear value, the target received power of a single transmission preamble is determined according to the sum of the logarithmic value corresponding to the first value and the first target received power, and the first value is a positive number greater than 1; or

[0282] 4. When the first target received power and the first value are both logarithmic values, the target received power of a single transmission preamble is determined according to the sum of the first target received power and the first value, and the first value is a positive number.

[0283] Optionally, when the first value is a linear value, the first value may be the ratio of the second number of repeated transmissions to the first number of repeated transmissions; when the first value is a logarithmic value, the first value may be 10log10(second number of repeated transmissions / first number of repeated transmissions); when the first value is a linear value, the logarithmic value corresponding to the first value may be 10log10(first value), and the first value may be the ratio of the second number of repeated transmissions / first number of repeated transmissions.

[0284] In combination with Example 3, method 5 will be used to describe in detail an exemplary description of how a terminal device determines a target receiving power for a single transmission preamble based on a first target receiving power and a first value.

[0285] Method 5

[0286] In one possible implementation, the terminal device determines the target received power of a single transmission preamble according to the first target received power and the first value. The terminal device determines a fourth target received power according to the first target received power and the first value, and the fourth target received power is greater than the first target received power. The terminal device determines the target received power of a single transmission preamble according to the fourth target received power and the second number of repeated transmissions.

[0287] As an example, when the first target receiving power and the first value are both linear values, the target receiving power of a single transmission preamble is determined according to the product of the first target receiving power and the first value, and the first value is a positive number greater than 1. Assume that the first target receiving power corresponding to the first number of repeated transmissions {5} is P1, the first value is A, and both P1 and A are linear values, that is, the expanded first target receiving power is P1'=P1*A, and A can be the ratio of the second number of repeated transmissions to the first number of repeated transmissions. The terminal device determines the target receiving power of a single transmission preamble according to P1' and the second number of repeated transmissions {8}. Target receiving power of a single transmission preamble = (P1*A) / 8.

[0288] As an example, when the first target received power and the first value are both linear values, the target received power of a single transmission preamble is determined based on the sum of the first target received power and the first value, and the first value is a positive number. Assume that the first target received power corresponding to the first number of repeated transmissions {5} is P1, the first value is A, A>0, and P1 and A are both linear values, that is, the expanded first target received power is P1'=P1+A. The terminal device determines the target received power of a single transmission preamble based on P1' and the second number of repeated transmissions {8}. The target received power of a single transmission preamble = (P1+A) / 8.

[0289] As an example, when the first target receiving power is a logarithmic value and the first value is a linear value, the target receiving power of a single transmission preamble is determined according to the sum of the logarithmic value corresponding to the first value and the first target receiving power, and the first value is a positive number greater than 1. Assume that the first target receiving power corresponding to the first number of repeated transmissions {5} is P1, the first value is A, A>1, and P1 is a logarithmic value, and A is a linear value, that is, the expanded first target receiving power is P1'=P1+10log10(A). The terminal device determines the target receiving power of a single transmission preamble according to P1' and the second number of repeated transmissions {8}. The target receiving power of a single transmission preamble = (P1+10log10(A))-10log10(8), and A can be the ratio of the second number of repeated transmissions to the first number of repeated transmissions.

[0290] As an example, when the first target receiving power and the first value are both logarithmic values, the target receiving power of a single transmission preamble is determined according to the sum of the logarithmic value corresponding to the first value and the first target receiving power, and the first value is a positive number. Assume that the first target receiving power corresponding to the first number of repeated transmissions {5} is P1, the first value A=10log10(second number of repeated transmissions / first number of repeated transmissions), A>0, and P1 and A are both logarithmic values, that is, the expanded first target receiving power is P1'=P1+10log10(second number of repeated transmissions / first number of repeated transmissions). The terminal device determines the target receiving power of a single transmission preamble according to P1' and the second number of repeated transmissions {8}.

[0291] It should be understood that the terminal device determines the transmission power of the single preamble sent by the terminal device according to the target reception power of the single transmission preamble.

[0292] In combination with the above-mentioned eMTC power control technical solution, the algorithm of the above-mentioned third target receiving power is used to replace the corresponding formula (3) in the above-mentioned eMTC power control technical solution, and the corresponding total target transmission power of the network device. The terminal device further determines the transmission power of a single preamble transmission based on formula (3) combined with formula (4) and formula (5). By increasing the target total receiving power of the network device, the target receiving power of a single transmission preamble increases accordingly, and the transmission power of the terminal device to send the preamble also increases at any time. The total power of the network device actually receiving the preamble of the terminal device is greatly improved, thereby further ensuring the detection performance of the network device for the preamble of the terminal device.

[0293] In another possible implementation, the terminal device determines the target received power of a single transmission preamble based on the first target received power and the first value. The terminal device directly determines the third target received power based on the first target received power and the second number of repeated transmissions, and the third target received power is the target received power of a single transmission preamble determined based on the first target received power and the second number of repeated transmissions. The terminal device determines the fifth target received power based on the third target received power and the first value, and the fifth target received power is greater than the third target received power. The terminal device determines the target received power of a single transmission preamble based on the fifth target received power and the second number of repeated transmissions.

[0294] As an example, when the first target received power and the first value are both linear values, the terminal device determines the target received power of a single transmission preamble according to the product of the first target received power and the first value, including: the terminal device determines a third target received power according to the first target received power, and the third target received power is a linear value. The terminal device determines the target received power of a single transmission preamble according to the product of the third target received power and the first value.

[0295] Assume that the second number of repeated transmissions is {8}, the first number of repeated transmissions is {5}, the first target received power corresponding to the first number of repeated transmissions is P1, the first value is A, A>1, and both P1 and A are linear values. The terminal device determines the third target received power as P1 / 8 based on the first target received power; the terminal device determines the target received power of a single transmission preamble as (P1 / 8)*A based on the product of the third target received power and the first value, where A can be the ratio of the second number of repeated transmissions to the first number of repeated transmissions.

[0296] As an example, when the first target received power and the first value are both linear values, the target received power of a single transmission preamble is determined according to the sum of the first target received power and the first value, and the first value is a positive number, including: the terminal device determines the third target received power according to the first target received power, and the third target received power is a linear value. The terminal device determines the target received power of a single transmission preamble according to the sum of the third target received power and the first value.

[0297] Assume that the second number of repeated transmissions is {8}, the first number of repeated transmissions is {5}, the first target received power corresponding to the first number of repeated transmissions {5} is P1, the first value is A, A>0, and both P1 and A are linear values. The terminal device determines the third target received power as P1 / 8 based on the first target received power; the terminal device determines the target received power of a single transmission preamble as the sum of the third target received power and the first value: the target received power of a single transmission preamble = (P1 / 8) + A.

[0298] As an example, when the first target received power is a logarithmic value and the first value is a linear value, the target received power of a single transmission preamble is determined according to the sum of the logarithmic value corresponding to the first value and the first target received power, and the first value is a positive number greater than 1, including: the terminal device determines the third target received power according to the first target received power, and the third target received power is a logarithmic value. The terminal device determines the target received power of a single transmission preamble according to the sum of the logarithmic value corresponding to the first value and the third target received power.

[0299] Assume that the second number of repeated transmissions is {8}, the first number of repeated transmissions is {5}, the first target received power corresponding to the first number of repeated transmissions {5} is P1, the first value is A, A>1, and P1 is a logarithmic value, and A is a linear value. The terminal device determines the third target received power as P1 / 8 based on the first target received power; the terminal device determines the target received power of a single transmission preamble as the sum of the logarithmic value corresponding to the first value and the third target received power: the target received power of a single transmission preamble = (P1-10log10(8))+10log10(A).

[0300] As an example, when the first target received power and the first value are both logarithmic values, the target received power of a single transmission preamble is determined according to the sum of the first value and the first target received power, and the first value is a positive number, including: the terminal device determines the third target received power according to the first target received power, and the third target received power is a logarithmic value. The terminal device determines the target received power of a single transmission preamble according to the sum of the first value and the third target received power.

[0301] Assume that the second number of repeated transmissions is {8}, the first number of repeated transmissions is {5}, the first target receiving power corresponding to the first number of repeated transmissions {5} is P1, the first value A = 10log10 (second number of repeated transmissions / first number of repeated transmissions), A>0, and P1 and A are both logarithmic values. The terminal device determines the third target receiving power as P1 / 8 based on the first target receiving power; the terminal device determines the target receiving power of a single transmission preamble based on the sum of the first value and the third target receiving power as: the target receiving power of a single transmission preamble = (P1-10log10(8))+10log10 (second number of repeated transmissions / first number of repeated transmissions).

[0302] It should be understood that the terminal device determines the transmission power of the single preamble sent by the terminal device according to the target reception power of the single transmission preamble.

[0303] In combination with the above-mentioned eMTC power control technical solution, the algorithm of the above-mentioned third target receiving power is used to replace the corresponding formula (3) in the above-mentioned eMTC power control technical solution, and the corresponding total target transmission power of the network device. The terminal device further determines the transmission power of a single preamble transmission based on formula (3) combined with formula (4) and formula (5). By increasing the target total receiving power of the network device, the target receiving power of a single transmission preamble increases accordingly, and the transmission power of the terminal device to send the preamble also increases at any time. The total power of the network device actually receiving the preamble of the terminal device is greatly improved, thereby further ensuring the detection performance of the network device for the preamble of the terminal device.

[0304] Based on the above situation 2, at least one target received power corresponding to the second number of repeated transmissions in the indication information is a single target received power configured by the network device, the first target received power is a single target received power configured by the network device, and the terminal device determines the actual transmit power according to the single target received power (first target received power), including the following examples:

[0305] Example 4:

[0306] The indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least two target received powers. The at least two target received powers include a first target received power corresponding to a first number of repeated transmissions, and the terminal device determines the target received power of a single transmission preamble according to the first target received power.

[0307] Example 5:

[0308] The indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. The at least one target received power includes a second target received power corresponding to the second number of repeated transmissions, and the terminal device determines the first target received power based on the at least one target received power and the first number of repeated transmissions. The terminal device determines the target received power (e.g., the third target received power) of a single transmission preamble based on the first target received power and the first value.

[0309] For example 4: the indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least two target received powers. The at least two target received powers include a first target received power corresponding to the first number of repeated transmissions, and the first target received power is the target received power of a single transmission preamble. The terminal device can determine the transmission power according to the first target received power.

[0310] It should be understood that the at least two target received powers corresponding to the second number of repeated transmissions indicated in the indication information are used to indicate the target received power of a single transmission preamble corresponding to the terminal device. That is, the first target received power of the at least two target received powers corresponds to the target received power of a single transmission preamble of the first number of repeated transmissions.

[0311] The following will introduce the method 6 and method 7 in detail in combination with the above example 4. Figure 4 The method shown.

[0312] Method 6

[0313] The network device sends indication information to the terminal device, wherein the indication information includes at least two target receiving powers corresponding to the second number of repeated transmissions, and the at least two target receiving powers are the target receiving powers of a single transmission preamble.

[0314] It should be understood that each number of repetitions configured by the network device for the terminal device is associated with at least two target received powers. That is, the second number of repetitions corresponds to at least two target received powers. The terminal device determines the first target received power based on the first number of repetitions and at least two target received powers, and then determines the transmission power of a single preamble based on the first target received power.

[0315] In one possible implementation, each of the at least two target receiving powers corresponds to an actual number of repeated transmissions of the terminal device, and the at least two target receiving powers include a first target receiving power, and the at least two target receiving powers are target receiving powers of a single transmission preamble.

[0316] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {4}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {4}, the target receiving power of a single transmission preamble corresponding to the number of repetitions {4} configured by the network device is Q4 and Q3. Wherein, when the second number of repetitions is {4}, at least two target receiving powers corresponding to the second number of repetitions are Q4 and Q3. Assume that when the actual number of repetitions of the terminal device, that is, the first number of repetitions is {3}, the terminal device determines that the first number of repetitions {3} is less than the second number of repetitions {4} configured by the network device, and the terminal device determines that the first target receiving power corresponding to the first number of repetitions {3} is Q3 based on the target receiving powers Q4 and Q3 corresponding to the number of repetitions {4} configured in the indication information, and further determines the transmission power of the single preamble based on the first target receiving power Q3.

[0317] The target received power Q3 may be greater than the target received power Q4, that is, Q3>Q4. That is, the greater the number of repeated transmissions of the terminal device, the smaller the single transmission target received power.

[0318] It should be understood that the terminal device determines that the number of repeated transmissions corresponding to Q3 is {3} and the number of repeated transmissions corresponding to Q4 is {4} according to the specific positions of the fields where Q3 and Q4 are located in the indication information. Q3 and Q4 are the target receiving powers of the single transmission preamble configured by the network device corresponding to the number of repeated transmissions. The relationship between Q3 and Q4 is mainly illustrated in this application by Q3 being greater than Q4. There may be other corresponding relationships between Q3 and Q4, which are not specifically limited in this application.

[0319] In a possible implementation, the at least two target received powers do not include the first target received power corresponding to the first number of repeated transmissions. The terminal device is predefined / preconfigured with the corresponding relationship between the at least two target received powers and the actual number of repeated transmissions.

[0320] As an example, assuming that the indication information is used to indicate that the second number of repeated transmissions of the preamble by the terminal device is {8}, wherein the indication information is also used to indicate that the number of repeated transmissions of the preamble by the terminal device is {8}, the target receiving power of the single transmission preamble corresponding to the network device is at least two of Q8, Q7, Q6 and Q5.

[0321] Assume that the second number of repetitions {8} may indicate the target receiving powers Q8, Q7, Q6 and Q5 corresponding to four single transmission preambles, and the terminal device itself is predefined / preconfigured that Q8, Q7, Q6 and Q5 correspond to the number of repetitions of 8, 7, 6 and 5 respectively; or, the second number of repetitions {8} may indicate the two target receiving powers Q8 and Q7, and the terminal device is predefined that Q8 and Q7 correspond to the number of repetitions of 8 and 7 respectively; or, the second number of repetitions {8} may indicate the two target receiving powers Q8 and Q5, and the terminal device is predefined that Q8 and Q7 correspond to the number of repetitions of 8 and 5 respectively; or, the second number of repetitions {8} may indicate the two target receiving powers Q8 and Q5, and the terminal device is predefined that Q8 corresponds to a number of repetitions of 8, and Q5 corresponds to a number of repetitions of 6 and 5.

[0322] In one possible implementation, the at least two target received powers do not include the first target received power corresponding to the first number of repeated transmissions. Each of the at least two target received powers corresponds to the difference (or interval) between the first number of repeated transmissions and the second number of repeated transmissions. The indication information includes a corresponding relationship between the difference between the first number of repeated transmissions and the second number of repeated transmissions and the at least two target received powers.

[0323] As an example, assuming that the indication information is used to indicate that the second number of repeated transmissions of the preamble by the terminal device is {8}, wherein the indication information is also used to indicate that the number of repeated transmissions of the preamble by the terminal device is {8}, the target receiving power of the single transmission preamble corresponding to the network device is at least two of Q8, Q7, Q6 and Q5.

[0324] For example, the indication information includes a first threshold value, which is the difference between the first number of repeated transmissions and the second number of repeated transmissions. The indication information includes the first threshold value, assuming that the first threshold value is 1, the terminal device determines that the first target received power corresponding to the first threshold value of 1 is Q7, which means that Q7 of at least two target received powers is the target received power with the difference of 1 between the first number of repeated transmissions and the second number of repeated transmissions, that is, the first target received power corresponding to the first number of repeated transmissions {7} is Q7; assuming that the first threshold value is 2, the terminal device determines that the first target received power corresponding to the first threshold value of 2 is Q6, which means that Q6 of at least two target received powers is the target received power with the difference of 2 between the first number of repeated transmissions and the second number of repeated transmissions, that is, the first target received power corresponding to the first number of repeated transmissions {6} is Q6; assuming that the first threshold value is 3, the terminal device determines that the first target received power corresponding to the first threshold value of 3 is Q5, which means that Q5 of at least two target received powers is the target received power with the difference of 3 between the first number of repeated transmissions and the second number of repeated transmissions, that is, the first target received power corresponding to the first number of repeated transmissions {5} is Q5.

[0325] Optionally, Q5>Q6>Q7>Q8.

[0326] Assume that the terminal device determines that the first number of repeated transmissions is {6}, and the terminal device selects Q6 as the first target received power according to at least two target received powers Q8, Q7, Q6 and Q5 corresponding to the number of repeated transmissions {8} in the indication information based on the difference between the first number of repeated transmissions {6} and the second number of repeated transmissions {8} in the indication information. The terminal device determines the transmission power of the single repetition preamble according to Q6.

[0327] After receiving the indication information, the terminal device determines the first number of repeated transmissions and the first target receiving power according to the indication information, and determines the transmission power according to the first target receiving power. The terminal device sends a preamble to the network device according to the first number of repeated transmissions and the transmission power.

[0328] As an example, assume that the device determines that the first number of repeated transmissions is {3} and the first target received power is Q3 according to the indication information. The terminal device further determines the transmission power of a single preamble (e.g., Q3') according to the first target received power Q3, and the terminal device sends the preamble to the network device according to the transmission power Q3', wherein the number of repeated transmissions of the preamble sent by the terminal device to the network device according to the transmission power Q3' is {3}. Alternatively, assume that the terminal device determines that the first number of repeated transmissions is {6} and the first target received power is Q6 according to the indication information. The terminal device further determines the transmission power of a single preamble (e.g., Q6') according to the first target received power Q6, and the terminal device sends the preamble to the network device according to the transmission power Q6', wherein the number of repeated transmissions of the preamble sent by the terminal device to the network device according to the transmission power Q6' is {6}.

[0329] Among them, the terminal device uses the first target receiving power as the target receiving power for a single transmission of a single preamble, and determines the transmission power for a single transmission of the preamble according to the first target receiving power. The specific calculation process is shown in the above formulas (1) to (5), which will not be repeated here.

[0330] Method 7

[0331] The network device sends indication information to the terminal device, wherein the indication information includes at least one target receiving power corresponding to the second number of repeated transmissions, and the at least one target receiving power does not include the first target receiving power.

[0332] Optionally, the indication information may include at least one second threshold value, and the second threshold value is used for the terminal device to determine the first target received power according to the at least one target received power. The terminal device determines the first target received power corresponding to the first number of repeated transmissions according to the second target received power and the second threshold value.

[0333] For example, the terminal device determines a third threshold value based on the second threshold value and the first number of repeated transmissions, and the third threshold value is a change value / offset value of the first target received power relative to the second target received power. The terminal device determines the first target received power based on the third threshold value and the second target received power. The second target received power is the target received power of a single transmission preamble corresponding to the second number of repeated transmissions, and the first target received power is the target received power of a single transmission preamble corresponding to the first number of repeated transmissions.

[0334] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {4}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {4}, the corresponding single target receiving power of the network device is Q4. The indication information includes a second threshold value, and the second threshold value is q1. Assume that when the actual number of repetitions of the terminal device is {3}, the terminal device determines that the first number of repetitions {3} is less than the second number of repetitions {4}, and the terminal device determines the third threshold value based on the second threshold value q1 and the first number of repetitions {3}. The third threshold value is p1, that is, the third threshold value is the same as the second threshold value. The terminal device determines the first target receiving power corresponding to the first number of repetitions {3} based on the third threshold value and the second target receiving power P4.

[0335] For example, the first target received power is determined according to Q4 and q1, that is, the first target received power = Q4 + q1.

[0336] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {8}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {8}, the target receiving power corresponding to the network device is Q 8. The indication information includes a second threshold value, and the second threshold value is q 1, q 2 and q 3. Among them, q1 can correspond to an actual number of repetitions of {5}, q 2 can correspond to an actual number of repetitions of {6}, and q 3 can correspond to an actual number of repetitions of {7}. Assuming that when the actual number of repetitions of the terminal device is {5}, the terminal device determines that the first number of repetitions {5} is less than the second number of repetitions {8}, and the terminal device can determine a third threshold value based on the second threshold value and the first number of repetitions {5}, and the third threshold value is q1. The terminal device determines the first target receiving power corresponding to the first number of repetitions {5} based on the third threshold value q1 and the second target receiving power Q8.

[0337] For example, the first target received power is determined according to Q8 and q1, that is, the first target received power = Q8 + q1.

[0338] It should be understood that the first target received power may also be determined by other algorithms or operations based on the second target received power and the second threshold, and this application does not limit this.

[0339] It should be understood that the terminal device can determine multiple power offset values ​​based on the second threshold and multiple predefined offset values, and the multiple power offset values ​​can respectively correspond to multiple actual repeated transmission times.

[0340] As an example, assume that the indication information is used to indicate that the number of repetitions of the terminal device to send a preamble is {8}, wherein the indication information is also used to indicate that when the number of repetitions of the terminal device to send a preamble is {8}, the target receiving power corresponding to the network device is Q8. The indication information includes a second threshold value, and the second threshold value is q1. Among them, the terminal device can determine multiple target receiving power offset values ​​according to multiple predefined numerical values ​​and the second threshold value q1. Assume that the terminal device predefines 3 numerical values, namely S1, S2 and S3. Among them, S1 can correspond to the first number of repetitions of the terminal device {5}, S2 can correspond to the first number of repetitions of the terminal device {6}; S3 can correspond to the first number of repetitions of the terminal device {7}. When the terminal device determines that the first number of repetitions is {5} according to the indication information, the terminal device determines the third threshold value as S1 according to the second threshold value and the first number of repetitions. The terminal device determines the first target receiving power according to S1 and the second target receiving power Q8. When the first number of repeated transmissions determined by the terminal device is {6}, the terminal device determines the third threshold value as S2 based on the second threshold value and the first number of repeated transmissions. The terminal device determines the first target received power based on S2 and the second target received power Q8. When the first number of repeated transmissions determined by the terminal device is {7}, the terminal device determines the third threshold value as S3 based on the second threshold value and the first number of repeated transmissions. The terminal device determines the first target received power based on S3 and the second target received power Q8.

[0341] For example, the first target received power is determined according to the sum of the second target received power and the third threshold, or the first target received power is determined according to the second target received power and the third threshold. It can also be determined by other algorithms, which is not limited in this application.

[0342] It should be understood that the at least one target received power includes the second target received power and does not include the first target received power. The terminal device may determine the first target received power based on the second target received power and at least one predefined third threshold. The at least one third threshold is predefined or preconfigured by the terminal device.

[0343] As an example, assume that the indication information is used to indicate that the number of repetitions of the preamble sent by the terminal device is {8}, wherein the indication information is also used to indicate that when the number of repetitions of the preamble sent by the terminal device is {8}, the second target receiving power corresponding to the network device is P8. Assume that the terminal device predefines the third threshold as a1, a2 and a3, and the third threshold is a power offset value. Among them, a1 corresponds to the first number of repetitions of the terminal device {5}, a2 corresponds to the first number of repetitions of the terminal device {6}; a3 corresponds to the first number of repetitions of the terminal device {7}.

[0344] For example, when the terminal device determines that the first number of repeated transmissions is {5} according to the indication information, the terminal device determines the first target received power according to the third threshold and the second target received power. Assuming that the second number of repeated transmissions is {8} and the second target received power is Q8, the terminal device determines the first target received power according to P8 and a1, that is, the first target received power = P8 + a1.

[0345] It should be understood that at least one target received power includes the second target received power and does not include the first target received power. The terminal device can determine the first target received power based on the second target received power and a predefined calculation rule / method. Wherein, the calculation rule / method is predefined / preconfigured for the terminal device, and the specific rules and methods are not specifically limited in this application.

[0346] After receiving the indication information, the terminal device determines the first number of repeated transmissions and the first target receiving power according to the indication information, and sends a preamble to the network device according to the first number of repeated transmissions and the transmission power.

[0347] As an example, assume that the terminal device determines that the first number of repeated transmissions is {5} and the first target receiving power is Q8+q1 according to the indication information. The terminal device further determines the transmission power of a single preamble (for example, (Q8+q1)') according to the first target receiving power Q8+q1, and the terminal device sends the preamble to the network device according to the transmission power (Q8+q1)'. Among them, the terminal device sends the preamble to the network device according to the transmission power (Q8+q1)', and the number of times the terminal device repeatedly sends the preamble to the network device is {5}. Alternatively, assume that the terminal device determines that the first number of repeated transmissions is {6} and the first target receiving power is Q8+S2 according to the indication information. The terminal device further determines the transmission power of a single preamble (for example, (Q8+S2)') according to the first target receiving power Q8+S2, and the terminal device sends the preamble to the network device according to the transmission power (Q8+S2)', wherein the number of repetitions of the preamble sent by the terminal device to the network device according to the transmission power (Q8+S2)' is {6}. Alternatively, assume that the terminal device determines the second number of repetitions to be {8} and the second target receiving power to be P8 according to the indication information. The terminal device determines the target receiving power of a single transmission preamble corresponding to the number of repetitions {5} to be Q8+q1 according to the second threshold value p1 in the indication information. The terminal device determines the first number of repetitions to be {6} according to the indication information, and the terminal device further determines the first target receiving power according to the predefined third threshold value (S1, S2 and S3) and the target receiving power Q8+q1 of the single transmission preamble corresponding to the number of repetitions {5}, for example, the first target receiving power is Q8+q1-S2. The terminal device further determines the transmission power of a single preamble (for example, (Q8+q1-S2)') based on the first target receiving power Q8+q1-S2, and the terminal device sends the preamble to the network device according to the transmission power (Q8+q1-S2)', wherein the number of repeated transmissions of the preamble sent by the terminal device to the network device according to the transmission power (Q8+q1-S2)' is {6}.

[0348] For the above-mentioned method 1 and method 2, the indication information may include a first threshold value and a second threshold value, and the first threshold value and the second threshold value are used by the terminal device to determine the first target received power. Among them, the first threshold value and the second threshold value may also be predefined or preconfigured by the terminal device, and no indication information is required to be sent. The terminal device may determine the first target received power directly based on the pre-stored threshold value and the second target received power in the indication information, or the terminal device itself predefines a method / rule for calculating the first target received power, and determines the first target received power according to the indication information, which is not limited in this application.

[0349] For Example 5: The indication information includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one target received power. The at least one target received power includes a second target received power corresponding to the second number of repeated transmissions, and the terminal device determines the first target received power based on the at least one target received power and the first number of repeated transmissions. The terminal device determines the target received power (e.g., the third target received power) for a single transmission of the preamble based on the first target received power and the first value.

[0350] Optionally, the first target received power is the target received power of a single transmission preamble corresponding to the first number of repeated transmissions, and the terminal device may determine the first target received power based on at least one target received power corresponding to the second number of repeated transmissions in the indication information. For an exemplary description of the terminal device determining the first target received power based on the at least one target received power, please refer to the detailed descriptions of Method 6 and Method 7 in Example 4 above.

[0351] Optionally, the first target received power is the target received power of a single transmission preamble corresponding to the first number of repeated transmissions, and the terminal device can determine the first target received power according to the second target received power in the indication information. The terminal device can use the second target received power corresponding to the second number of repeated transmissions as the first target received power corresponding to the first number of repeated transmissions, that is, the first target received power is equal to the second target received power.

[0352] It should be understood that the terminal device determines the target received power of the single transmission preamble according to the first target received power and the first value. For the specific algorithm for the terminal device to determine the target received power of the single transmission preamble according to the first target received power and the first value, please refer to the specific description of Example 3 in the above situation 1, and the first target received power in Example 3 is regarded as the target received power of the single transmission preamble corresponding to the first number of repeated transmissions determined by the terminal device according to the indication information, that is, it is applicable to the technical solution in Example 5.

[0353] The first target received power is the target received power of the single transmission preamble corresponding to the first number of repeated transmissions determined by the terminal device according to the indication information. The terminal device determines the target received power of the single transmission preamble used to calculate the transmission power based on the first target received power and the first value, and the target received power of the single transmission preamble is greater than the first target received power.

[0354] In combination with method eight, the first target received power is taken as preambleInitialReceivedTargetPower as an example, and the target received power of a single transmission preamble is taken as preambleInitialReceivedTargetPower' as an example. The terminal device determines the target received power of a single transmission preamble corresponding to the network device according to the indication information. The terminal device expands the preambleInitialReceivedTargetPower in the above formula (2) and formula (3) respectively, and uses the expanded preambleInitialReceivedTargetPower as the target received power of a single transmission preamble, calculates the transmit power of a single transmission preamble, and introduces it in detail:

[0355] Method 8

[0356] First example:

[0357] As an example, according to the first target received power and A, the target received power of a single transmission preamble is determined, where A is a first value:

[0358] For example, preambleInitialReceivedTargetPower'=(preambleInitialReceivedTargetPower+A). preambleInitialReceivedTargetPower' is greater than preambleInitialReceivedTargetPower.

[0359] Among them, the value of the first target received power (for example, preambleInitialReceivedTargetPower) is a logarithmic value. When the first value is a logarithmic value, the target received power of a single transmission preamble is determined according to the sum of the first target received power and A, and A is a positive number greater than 0; or, the value of the first target received power (for example, preambleInitialReceivedTargetPower) is a linear value. When the first value is a linear value, the target received power of a single transmission preamble is determined according to the sum of the first target received power and A, and A is a positive number greater than 0.

[0360] The following takes the first target received power (eg, preambleInitialReceivedTargetPower) as a logarithmic value and A as a logarithmic value as an example to describe in detail how to determine the target received power for a single transmission of a preamble based on the sum of the first target received power and A.

[0361] Combined with formula (2) in the above NR power control technical solution, the target receiving power of a single preamble transmission of a network device is:

[0362] PRACH_RECEIVED_TARGET_POWER′

[0363] =(preambleInitialReceivedTargetPower+A)+DELTA_PREAMBLE

[0364] +(PREAMBLE_POWER_RAMPING_COUNTER–1)

[0365] ×PREAMBLE_POWER_RAMPING_STEP+POWER_OFFSET_2STEP_RA

[0366] Wherein, A=10*log10(second number of repeated transmissions / first number of repeated transmissions).

[0367] The terminal device determines the transmission power of a single preamble according to preambleInitialReceivedTargetPower'=preambleInitialReceivedTargetPower+A:

[0368] P PRACH =min{P CMAX,c(i) , PRACH_RECEIVED_TARGET_POWER′+PL c}.

[0369] It can be seen that the terminal device can use preambleInitialReceivedTargetPower'=(preambleInitialReceivedTargetPower+A) as the target receiving power of a single transmission of the preamble, which can improve the transmission power of the terminal device for a single transmission of the preamble, so that the total power of the network device actually receiving the preamble of the terminal device is greatly improved, thereby further ensuring the detection performance of the network device for the preamble sequence of the terminal device.

[0370] In combination with the above eMTC power control technical solution, preambleInitialReceivedTargetPower'=(preambleInitialReceivedTargetPower+A) is used to replace the corresponding formula (3), preambleInitialReceivedTargetPower involved in formula (4) and formula (5) in the above eMTC power control technical solution. This increases the target receiving power of the single transmission preamble of the network device, and determines the transmission power of the preamble sent by the terminal device according to the enlarged target receiving power of the single transmission preamble. This greatly improves the total power of the preamble actually received by the network device, thereby further ensuring the detection performance of the network device for the preamble of the terminal device.

[0371] Second example:

[0372] As an example, the target received power of a single transmission preamble is determined according to the first target received power and A. The first target received power is a logarithmic value, A is a linear value, and A is a positive number greater than 1:

[0373] Assume, preambleInitialReceivedTargetPower'=(preambleInitialReceivedTargetPower+1 0log 10(A)). preambleInitialReceivedTargetPower' is greater than preambleInitialReceivedTargetPower.

[0374] When the value of the first target received power (eg, preambleInitialReceivedTargetPower) is a logarithmic value and A is a linear value, the target received power of a single transmission preamble is determined according to the sum of the first target received power and the logarithm corresponding to A.

[0375] The value of preambleInitialReceivedTargetPower is a logarithmic value, and A is a linear value. For example, A = the second number of repeated transmissions / the first number of repeated transmissions. The preambleInitialReceivedTargetPower' is determined according to the logarithmic values ​​corresponding to preambleInitialReceivedTargetPower and A:

[0376] preambleInitialReceivedTargetPower'=

[0377] preambleInitialReceivedTargetPower+10log10(second repeated transmission times / first repeated transmission times)

[0378] The following takes the value of preambleInitialReceivedTargetPower as a logarithmic value and the value of A as a linear value as an example to describe in detail how to determine the target received power of a single transmission preamble based on the sum of the first target received power and the logarithmic value corresponding to A.

[0379] Combined with formula (2) in the above NR power control technical solution, the target receiving power of a single preamble transmission of a network device is:

[0380] PRACH_RECEIVED_TARGET_POWER′

[0381] =preambleInitialReceivedTargetPower+1 0log10(A)+DELTA_PREAMBLE

[0382] +(PREAMBLE_POWER_RAMPING_COUNTER–1)

[0383] ×PREAMBLE_POWER_RAMPING_STEP+POWER_OFFSET_2STEP_RA

[0384] Wherein, A=second number of repeated transmissions / first number of repeated transmissions, 1 0log10(A)=1 0log10(second number of repeated transmissions / first number of repeated transmissions).

[0385] The terminal device determines the transmission power of the single transmission preamble sequence according to preambleInitialReceivedTargetPower'=preambleInitialReceivedTargetPower+1 0log 10(A):

[0386] P PRACH =min{P CMAX,c(i) , PRACH_RECEIVED_TARGET_POWER′+PL c}.

[0387] It can be seen that the terminal device can use preambleInitialReceivedTargetPower'=preambleInitialReceivedTargetPower+1 0log10(A) as the transmission power of a single preamble transmission, which can improve the transmission power of a single preamble transmission by the terminal device, so that the total power of the preamble sequence actually received by the network device is greatly improved, thereby further ensuring the detection performance of the network device for the preamble sequence of the terminal device.

[0388] In combination with the above eMTC power control technical solution, preambleInitialReceivedTargetPower'=preambleInitialReceivedTargetPower+1 0log10(A) is used to update the corresponding formula (3), formula (4) and preambleInitialReceivedTargetPower involved in formula (5) in the above eMTC power control technical solution, thereby increasing the target receiving power of the network device for a single transmission of the preamble, and the terminal device determines the transmission power of the preamble sent by the terminal device according to the enlarged target receiving power of the single transmission of the preamble. The total power of the preamble actually received by the network device for the terminal device is greatly improved, thereby further ensuring the detection performance of the network device for the leading sequence of the terminal device.

[0389] Third example:

[0390] As an example, the target received power of a single transmission preamble is determined according to the first target received power and A. The first target received power is a linear value, A is a linear value, and A is a positive number greater than 1:

[0391] The first target receiving power is directly increased by A times, that is, the target receiving power of the single transmission preamble sequence is determined according to the product of the first target receiving power and the first value. For example, A = the second number of repeated transmissions / the first number of repeated transmissions. The second number of repeated transmissions is greater than the first number of repeated transmissions, and A is a positive number greater than 1.

[0392] Assume that, in the calculation process of the transmission power of a single preamble transmission, the calculation parameters involved are all linear values, such as preambleInitialReceivedTargetPower linear It is the linear value of the target received power of a single transmission preamble. The terminal device uses preambleInitialReceivedTargetPower linearWhen determining the transmission power of a single preamble, the terminal device can use preambleInitialReceivedTargetPower linear Updated to A*preambleInitialReceivedTargetPower linear , and according to A*preambleInitialReceivedTargetPower linear Determines the transmission power of a single preamble transmission.

[0393] Assuming that, in the calculation process of the transmit power of a single preamble transmission, the calculation parameters involved have logarithmic values / are all logarithmic values, the terminal device can replace the target receive power of a single transmission preamble in the original calculation process with preambleInitialReceivedTargetPower′=10log 10(preambleInitialReceivedTargetPowerXA), and determine the transmit power of a single preamble transmission based on preambleInitialReceivedTargetPower′.

[0394] For example, combined with the above NR power control technical solution, assuming preambleInitialReceivedTargetPower linear is the linear value of the target received power of a single preamble transmission, A is a linear value, and the terminal device uses preambleInitialReceivedTargetPower′=10log 10(A*preambleInitialReceivedTargetPower line ar ) replaces preambleInitialReceivedTargetPower in formula (2) and determines PRACH_RECEIVED_TARGET_POWER′(single), as follows:

[0395] PRACH_RECEIVED_TARGET_POWER′(single)

[0396] =10log10(A*preambleInitialReceivedTargetPower linear )+DELTA_PREAMBLE

[0397] +(PREAMBLE_POWER_RAMPING_COUNTER–1)

[0398] ×PREAMBLE_POWER_RAMPING_STEP+POWER_OFFSET_2STEP_RA

[0399] The terminal device determines the transmission power of the preamble sent by the terminal device in a single transmission according to PRACH_RECEIVED_TARGET_POWER′ (single), as follows:

[0400] P PRACH =min{P CMAX,c(i) , PRACH_RECEIVED_TARGET_POWER′(single)+PL c}

[0401] It should be understood that in the NR power control technical solution, since both preambleInitialReceivedTargetPower and A are linear values, when the terminal device determines the transmission power of the preamble sent by the terminal device in a single transmission by combining the above formula (1) and formula (2), 10log10(A*preambleInitialReceivedTargetPower linear ) as the preambleInitialReceivedTargetPower in formula (2), and determine PRACH_RECEIVED_TARGET_POWER′(single). The terminal device determines the transmission power of the preamble sent by the terminal device at a time according to PRACH_RECEIVED_TARGET_POWER′(single). Through the above method, the total power of the preamble actually received by the network device is greatly improved, thereby further ensuring the detection performance of the network device for the preamble sequence of the terminal device.

[0402] According to the above Figure 4 In the method shown in the figure, when the number of times the terminal device repeatedly sends the preamble is less than the number of times the network device configures the repetition number of transmissions, that is, the first number of repetitions is less than the second number of repetitions, the above Figure 4 The method in the invention can greatly improve the total power of the network device actually receiving the preamble of the terminal device, thereby ensuring the detection performance of the network device for the preamble.

[0403] It is understandable that in order to implement the functions in the above embodiments, the network device and the terminal device include hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0404] Figure 5 and Figure 6 The following is a schematic diagram of the structure of possible communication devices provided in the embodiments of the present application. These communication devices can be used to implement the functions of the terminal device or network device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device can be as follows: Figure 1 Any one of the first terminal device 12 and the second terminal device 13 shown in the figure may also be as follows Figure 1 The first network device 11 shown may also be a module (such as a chip) applied to a terminal device or a network device.

[0405] like Figure 5 As shown, the communication device 500 includes a processing unit 510 and a transceiver unit 520. The communication device 500 is used to implement the above Figure 4 The functions of the terminal device or the network device in the method embodiment are shown.

[0406] When the communication device 500 is used to implement Figure 4 The functions of the terminal device in the method embodiment shown are:

[0407] The transceiver unit 520 is used to receive indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers;

[0408] The processing unit 510 is configured to determine, according to the indication information, a first number of repetitions for the terminal device to repeatedly send the preamble sequence, and a first target received power corresponding to the first number of repetitions, wherein the first target received power is determined according to the target received power, the first number of repetitions being less than the second number of repetitions, and the second number of repetitions being the number of repetitions that is closest to the first number of repetitions among the number of repetitions;

[0409] The processing unit 510 is further used to determine the target receiving power of the terminal device for a single transmission of the leading sequence based on the first target receiving power and the first number of repeated transmissions; the transceiver unit is further used to determine the transmission power based on the target receiving power for the single transmission of the leading sequence, and to send the leading sequence to the network device according to the first number of repeated transmissions and the transmission power, where the transmission power is the transmission power of the terminal device for a single transmission of the leading sequence.

[0410] The transceiver unit 520 can perform Figure 4 The processing unit 510 can perform the receiving and sending processing; Figure 4 Other processing besides receiving and sending.

[0411] When the communication device 500 is used to implement Figure 4 The functions of the terminal device in the method embodiment shown are:

[0412] The transceiver unit 520 is used to receive indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers;

[0413] The processing unit 510 is configured to determine, according to the indication information, a first number of repetitions for the terminal device to repeatedly send the preamble sequence, and a first target received power corresponding to the first number of repetitions, wherein the first target received power is determined according to the target received power, the first number of repetitions being less than the second number of repetitions, and the second number of repetitions being the number of repetitions that is closest to the first number of repetitions among the number of repetitions;

[0414] The processing unit 510 is further configured to determine a target received power for a single transmission of the preamble sequence according to the first target received power and the first value. Optionally, the target received power for a single transmission of the preamble sequence is greater than a third target received power, and the third target received power is the target received power for a single transmission of the preamble sequence determined according to the first target received power;

[0415] The transceiver unit 520 is also used to determine the transmission power according to the target receiving power of the single transmission of the leading sequence, and send the leading sequence to the network device according to the first number of repeated transmissions and the transmission power, and the transmission power is the transmission power of the terminal device sending the leading sequence once.

[0416] The transceiver unit 520 can perform Figure 4 The processing unit 510 can perform the receiving and sending processing; Figure 4Other processing besides receiving and sending.

[0417] When the communication device 500 is used to implement Figure 4 The functions of the terminal device in the method embodiment shown are:

[0418] The transceiver unit 520 is used to receive indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, where the second number of repetitions corresponds to at least two of the target received powers;

[0419] The processing unit 510 is configured to determine, according to the indication information, a first number of repetitions for the terminal device to repeatedly send the preamble sequence, and a first target received power corresponding to the first number of repetitions, wherein the first target received power is one of the at least two target received powers, the first number of repetitions is less than the second number of repetitions, and the second number of repetitions is the number of repetitions that is closest to the first number of repetitions among the number of repetitions;

[0420] The transceiver unit 520 is also used to determine the transmission power according to the first target receiving power, and send the leading sequence to the network device according to the first number of repeated transmissions. The transmission power is the transmission power of the terminal device sending the leading sequence once.

[0421] The transceiver unit 520 can perform Figure 4 The processing unit 510 can perform the receiving and sending processing; Figure 4 Other processing besides receiving and sending.

[0422] When the communication device 500 is used to implement Figure 4 The functions of the network device in the method embodiment shown are:

[0423] The transceiver unit 520 is used to send indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers;

[0424] The transceiver unit 520 is also used to receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on the target receive power of the single transmission of the preamble sequence, the target receive power of the single transmission of the preamble sequence is determined based on the first target receive power and the first number of repeated transmissions, the first target receive power and the first number of repeated transmissions are determined based on the indication information, the first target receive power is determined based on the target receive power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

[0425] The transceiver unit 520 can perform Figure 4 The receiving and sending processing in

[0426] Optionally, the communication device 500 may further include a processing unit 510, which may execute Figure 4 Other processing besides receiving and sending.

[0427] When the communication device 500 is used to implement Figure 4 The functions of the network device in the method embodiment shown are:

[0428] The transceiver unit 520 is used to send indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers;

[0429] The transceiver unit 520 is also used to receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on the target receive power of the single transmission of the preamble sequence, the target receive power of the single transmission of the preamble sequence is determined based on the first target receive power and a first value, the first target receive power is determined based on the target receive power, the first target receive power corresponds to a first number of repeated transmissions, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

[0430] Optionally, the target received power for the single transmission of the preamble sequence is greater than a third target received power, and the third target received power is the target received power for the single transmission of the preamble sequence determined according to the first target received power.

[0431] The transceiver unit 520 can perform Figure 4 The receiving and sending processing in

[0432] Optionally, the communication device 500 may further include a processing unit 510, which may execute Figure 4 Other processing besides receiving and sending.

[0433] When the communication device 500 is used to implement Figure 4 The functions of the network device in the method embodiment shown are:

[0434] The transceiver unit 520 is used to send indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least two of the target received powers;

[0435] The transceiver unit 520 is also used to receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on a first target receive power, the first number of repeated transmissions is one of the at least two target receive powers, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

[0436] The transceiver unit 520 can perform Figure 4 The receiving and sending processing in

[0437] Optionally, the communication device 500 may further include a processing unit 510, which may execute Figure 4 Other processing besides receiving and sending.

[0438] For more detailed description of the processing unit 510 and the transceiver unit 520, please refer to Figure 4 The relevant description in the method embodiment shown is directly obtained and will not be repeated here.

[0439] like Figure 6 As shown, the communication device 610 includes a processor 610 and an interface circuit 620. The processor 610 and the interface circuit 620 are coupled to each other. It is understood that the interface circuit 620 can be a transceiver or an input-output interface. Optionally, the communication device 610 can also include a memory 630 for storing instructions executed by the processor 610 or storing input data required by the processor 610 to execute instructions or storing data generated after the processor 610 executes instructions.

[0440] When the communication device 610 is used to implement Figure 4When the method is shown, the processor 610 is used to implement the function of the above-mentioned processing unit 510, and the interface circuit 620 is used to implement the function of the above-mentioned transceiver unit 520.

[0441] When the above communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiment. The terminal chip receives information from other modules in the terminal (such as a radio frequency module or an antenna), and the information is sent by the base station to the terminal; or the terminal chip sends information to other modules in the terminal (such as a radio frequency module or an antenna), and the information is sent by the terminal to the base station.

[0442] When the above-mentioned communication device is a module applied to a base station, the base station module implements the functions of the base station in the above-mentioned method embodiment. The base station module receives information from other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the terminal to the base station; or, the base station module sends information to other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the base station to the terminal. The base station module here can be a baseband chip of a base station, or it can be a DU or other module, and the DU here can be a DU under an open radio access network (O-RAN) architecture.

[0443] It is understandable that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0444] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and the storage medium can also be present in a base station or a terminal as discrete components.

[0445] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, 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 programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc; it may also be a semiconductor medium, for example, a solid-state hard disk. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0446] Depending on whether it is used in the specification, it is optional: In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of this application, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0447] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A power control method, characterized in that: include: Receive indication information, where the indication information is used to indicate the number of repetitions of a preamble sequence to be repeatedly sent by the terminal device on a physical random access channel PRACH resource, and a target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, where the second number of repetitions corresponds to at least one of the target received powers; Determine, according to the indication information, a first number of repeated transmissions of the leading sequence by the terminal device, and a first target received power corresponding to the first number of repeated transmissions, wherein the first target received power is determined according to the target received power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions among the number of repeated transmissions that is closest to the first number of repeated transmissions; Determine, according to the first target received power and the first number of repeated transmissions, a target received power for a single transmission of the preamble sequence by the terminal device; The transmission power is determined according to the target receiving power of the single transmission of the preamble sequence, and the preamble sequence is sent to the network device according to the first number of repeated transmissions and the transmission power, where the transmission power is the transmission power of the terminal device sending the preamble sequence once.

2. The method according to claim 1, characterized in that: The first target received power is a logarithmic value, the first number of repeated transmissions is a linear value, and determining, according to the first target received power and the first number of repeated transmissions, a target received power of the preamble sequence transmitted by the terminal device for a single time includes: The target receiving power of the terminal device for a single transmission of the leading sequence is determined based on the difference between the logarithmic value corresponding to the first number of repeated transmissions and the first target receiving power.

3. The method according to claim 1 or 2, characterized in that: The second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include a second target received power.

4. The method according to claim 3, characterized in that: The indication information is used to indicate the second number of repeated transmissions and the at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers also include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as the second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

5. A power control method, characterized in that: include: Receive indication information, where the indication information is used to indicate the number of repetitions of a preamble sequence to be repeatedly sent by the terminal device on a physical random access channel PRACH resource, and a target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, where the second number of repetitions corresponds to at least one of the target received powers; Determine, according to the indication information, a first number of repeated transmissions of the leading sequence by the terminal device, and a first target received power corresponding to the first number of repeated transmissions, wherein the first target received power is determined according to the target received power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions among the number of repeated transmissions that is closest to the first number of repeated transmissions; Determine a target received power for a single transmission of the preamble sequence according to the first target received power and a first value; The transmission power is determined according to the target receiving power of the single transmission of the preamble sequence, and the preamble sequence is sent to the network device according to the first number of repeated transmissions and the transmission power, where the transmission power is the transmission power of the terminal device sending the preamble sequence once.

6. The method according to claim 5, characterized in that In a case where the first target received power is a total target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, determining a target received power for a single transmission of the preamble sequence according to the first target received power and a first value includes: Determine a fourth target received power according to the first target received power and the first value, wherein the fourth target received power is greater than the first target received power; Determine the target received power of the single transmission of the preamble sequence according to the fourth target received power and the second number of repeated transmissions, or, In a case where the first target received power is a single target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, the first target received power is equal to the third target received power, and determining the target received power for the single transmission of the preamble sequence according to the first target received power and a first value includes: The target received power of the single transmission of the preamble sequence is determined according to the third target received power and the first value.

7. The method according to claim 5 or 6, characterized in that: The determining, according to the first target received power and a first value, a target received power for transmitting the preamble sequence for a single time, comprises: The first target received power is a linear value. When the first value is a linear value, the target received power of the single transmission of the preamble sequence is determined according to the product of the first target received power and the first value, and the first value is a positive number greater than 1; or, The first target received power is a logarithmic value. When the first value is a logarithmic value, the target received power of the single transmission of the preamble sequence is determined according to the sum of the first target received power and the first value, and the first value is a positive number greater than 0; or, The first target received power is a logarithmic value. When the first value is a linear value, the target received power of the single transmission of the leading sequence is determined according to the sum of the logarithmic value corresponding to the first value and the first target received power, and the first value is a positive number greater than 1.

8. The method according to any one of claims 5 to 7, characterized in that The second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include a second target received power.

9. The method according to claim 8, characterized in that The indication information is used to indicate the second number of repeated transmissions and the at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers also include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as the second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

10. A power control method, characterized in that: include: Receive indication information, where the indication information is used to indicate the number of repetitions of a preamble sequence to be repeatedly sent by the terminal device on a physical random access channel PRACH resource, and a target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, where the second number of repetitions corresponds to at least two of the target received powers; Determine, according to the indication information, a first number of repetitions of the leading sequence repeatedly sent by the terminal device, and a first target received power corresponding to the first number of repetitions, wherein the first target received power is one of the at least two target received powers, the first number of repetitions is less than the second number of repetitions, and the second number of repetitions is the number of repetitions that is closest to the first number of repetitions among the number of repetitions; The transmission power is determined according to the first target receiving power, and the leading sequence is sent to the network device according to the first number of repeated transmissions. The transmission power is the transmission power of the leading sequence sent by the terminal device once.

11. The method according to claim 10, characterized in that The indication information is used to indicate the second number of repeated transmissions and at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as a second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

12. A power control method, characterized in that: include: Sending indication information, wherein the indication information is used to instruct the terminal device to repeatedly send the preamble sequence on the physical random access channel PRACH resource, and the target received power corresponding to the number of repeated transmissions, wherein the number of repeated transmissions includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one of the target received powers; Receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on a target receive power of the preamble sequence for a single transmission, the target receive power of the preamble sequence for a single transmission is determined based on a first target receive power and a first number of repeated transmissions, the first target receive power and the first number of repeated transmissions are determined based on the indication information, the first target receive power is determined based on the target receive power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

13. The method according to claim 12, characterized in that The target received power of the single transmission of the preamble sequence is determined according to the first target received power and the first number of repeated transmissions, including: The first target receiving power is a logarithmic value, the first number of repeated transmissions is a linear value, and the target receiving power of the terminal device for a single transmission of the leading sequence is determined based on the difference between the logarithmic value corresponding to the first number of repeated transmissions and the first target receiving power.

14. A power control method, characterized in that: include: Sending indication information, wherein the indication information is used to instruct the terminal device to repeatedly send the preamble sequence on the physical random access channel PRACH resource, and the target received power corresponding to the number of repeated transmissions, wherein the number of repeated transmissions includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least one of the target received powers; Receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on a target receive power of the preamble sequence for a single transmission, the target receive power of the preamble sequence for a single transmission is determined based on a first target receive power and a first value, the first target receive power is determined based on the target receive power, the first target receive power corresponds to a first number of repeated transmissions, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

15. The method according to claim 14, characterized in that The target received power of the single transmission of the preamble sequence is determined according to the first target received power and the first value, including: In a case where the first target received power is the total target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, the target received power for a single transmission of the preamble sequence is determined according to a fourth target received power and the second number of repeated transmissions, the fourth target received power is determined according to the first target received power and the first value, and the fourth target received power is greater than the first target received power; or, In a case where the first target received power is a single target received power for transmitting the leading sequence corresponding to the first number of repeated transmissions determined according to the indication information, the target received power for the single transmission of the leading sequence is determined based on a third target received power and the first value, and the third target received power is equal to the first target received power.

16. The method according to claim 14 or 15, characterized in that The target received power of the single transmission of the preamble sequence is determined according to the first target received power and the first value, including: The first target received power is a linear value. When the first value is a linear value, the target received power of the single transmission of the preamble sequence is determined according to the product of the first target received power and the first value, and the first value is a positive number greater than 1; or, The first target received power is a logarithmic value. When the first value is a logarithmic value, the target received power of the single transmission of the preamble sequence is determined according to the sum of the first target received power and the first value, and the first value is a positive number greater than 0; or, The first target received power is a logarithmic value. When the first value is a linear value, the target received power of the single transmission of the leading sequence is determined based on the sum of the logarithmic value corresponding to the first value and the first target received power, and the first value is a positive number greater than 1.

17. The method according to any one of claims 12 to 16, characterized in that The second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include a second target received power.

18. A power control method, characterized in that: include: Sending indication information, wherein the indication information is used to instruct the terminal device to repeatedly send the preamble sequence on the physical random access channel PRACH resource, and the target received power corresponding to the number of repeated transmissions, wherein the number of repeated transmissions includes a second number of repeated transmissions, and the second number of repeated transmissions corresponds to at least two of the target received powers; Receive the preamble sequence sent by the terminal device, the transmit power of the terminal device corresponding to the preamble sequence is determined based on a first target receive power, the first target receive power is one of the at least two target receive powers, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

19. The method according to claim 17 or 18, characterized in that The indication information is used to indicate the second number of repeated transmissions and the at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as a second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

20. A communication device, characterized in that: Including transceiver unit and processing unit, The transceiver unit is used to receive indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers; The processing unit is used to determine, according to the indication information, a first number of repeated transmissions of the preamble sequence by the terminal device, and a first target received power corresponding to the first number of repeated transmissions, wherein the first target received power is determined according to the target received power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions among the number of repeated transmissions that is closest to the first number of repeated transmissions; The processing unit is further used to determine the target receiving power of the preamble sequence transmitted by the terminal device in a single transmission according to the first target receiving power and the first number of repeated transmissions; The transceiver unit is also used to determine the transmission power based on the target receiving power of the single transmission of the leading sequence, and send the leading sequence to the network device according to the first number of repeated transmissions and the transmission power, and the transmission power is the transmission power of the terminal device sending the leading sequence once.

21. The device according to claim 20, characterized in that The first target receiving power is a logarithmic value, and the first number of repeated transmissions is a linear value. The processing unit is also used to determine the target receiving power of the terminal device for a single transmission of the leading sequence based on the difference between the logarithmic value corresponding to the first number of repeated transmissions and the first target receiving power.

22. The device according to claim 20 or 21, characterized in that The second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include a second target received power.

23. The device according to claim 22, characterized in that The indication information is used to indicate the second number of repeated transmissions and the at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers also include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as the second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

24. A communication device, characterized in that: include: Including transceiver unit and processing unit, The transceiver unit is used to receive indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers; The processing unit is used to determine, according to the indication information, a first number of repeated transmissions of the preamble sequence by the terminal device, and a first target received power corresponding to the first number of repeated transmissions, wherein the first target received power is determined according to the target received power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions among the number of repeated transmissions that is closest to the first number of repeated transmissions; The processing unit is further configured to determine a target received power for a single transmission of the preamble sequence according to the first target received power and a first value; The transceiver unit is also used to determine the transmission power based on the target receiving power of the single transmission of the leading sequence, and send the leading sequence to the network device according to the first number of repeated transmissions and the transmission power, and the transmission power is the transmission power of the terminal device sending the leading sequence once.

25. The device according to claim 24, characterized in that In a case where the first target received power is a total target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, The processing unit is further configured to determine a fourth target received power according to the first target received power and the first value, wherein the fourth target received power is greater than the first target received power; The processing unit is further configured to determine the target received power of the single transmission of the preamble sequence according to the fourth target received power and the second number of repeated transmissions, or, In a case where the first target received power is a single target received power of transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, The processing unit is further configured to determine a target received power for the single transmission of the preamble sequence according to the third target received power and the first value.

26. The device according to claim 24 or 25, characterized in that The first target received power is a linear value, and when the first value is a linear value, the processing unit is further used to determine the target received power of the single transmission of the preamble sequence according to the product of the first target received power and the first value, and the first value is a positive number greater than 1; or, The first target received power is a logarithmic value, and when the first value is a logarithmic value, the processing unit is further used to determine the target received power of the single transmission of the preamble sequence according to the sum of the first target received power and the first value, and the first value is a positive number greater than 0; or, The first target received power is a logarithmic value. When the first value is a linear value, the processing unit is further used to determine the target received power of the single transmission of the leading sequence based on the sum of the logarithmic value corresponding to the first value and the first target received power, and the first value is a positive number greater than 1.

27. The device according to any one of claims 24 to 26, characterized in that The second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include a second target received power.

28. The device according to claim 27, characterized in that The indication information is used to indicate the second number of repeated transmissions and the at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as the second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

29. A communication device, characterized in that: Including transceiver unit and processing unit, The transceiver unit is used to receive indication information, where the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, where the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least two of the target received powers; The processing unit is used to determine, according to the indication information, a first number of repeated transmissions of the preamble sequence by the terminal device, and a first target received power corresponding to the first number of repeated transmissions, wherein the first target received power is one of the at least two target received powers, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions among the number of repeated transmissions that is closest to the first number of repeated transmissions; The transceiver unit is also used to determine the transmission power according to the first target receiving power, and send the leading sequence to the network device according to the first number of repeated transmissions. The transmission power is the transmission power of the terminal device sending the leading sequence once.

30. The device according to claim 29, characterized in that The indication information is used to indicate the second number of repeated transmissions and at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as a second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

31. A communication device, characterized in that: include: A transceiver unit, configured to send indication information, wherein the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, wherein the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers; The transceiver unit is also used to receive the preamble sequence sent by the terminal device, the transmission power of the terminal device corresponding to the preamble sequence is determined based on the target receiving power of the preamble sequence for a single transmission, the target receiving power of the preamble sequence for a single transmission is determined based on a first target receiving power and a first number of repeated transmissions, the first target receiving power and the first number of repeated transmissions are determined based on the indication information, the first target receiving power is determined based on the target receiving power, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

32. The device according to claim 31, characterized in that The target received power of the single transmission of the preamble sequence is determined according to the first target received power and the first number of repeated transmissions, including: The first target receiving power is a logarithmic value, the first number of repeated transmissions is a linear value, and the target receiving power of the terminal device for a single transmission of the leading sequence is determined based on the difference between the logarithmic value corresponding to the first number of repeated transmissions and the first target receiving power.

33. A communication device, characterized in that: include: A transceiver unit, configured to send indication information, wherein the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on the physical random access channel PRACH resource, and the target received power corresponding to the number of repetitions, wherein the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least one of the target received powers; The transceiver unit is also used to receive the preamble sequence sent by the terminal device, the transmission power of the terminal device corresponding to the preamble sequence is determined based on the target receiving power of the preamble sequence for a single transmission, the target receiving power of the preamble sequence for a single transmission is determined based on a first target receiving power and a first value, the first target receiving power is determined based on the target receiving power, the first target receiving power corresponds to a first number of repeated transmissions, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

34. The device according to claim 33, characterized in that In a case where the first target received power is the total target received power for transmitting the preamble sequence corresponding to the first number of repeated transmissions determined according to the indication information, the target received power for a single transmission of the preamble sequence is determined according to a fourth target received power and the second number of repeated transmissions, the fourth target received power is determined according to the first target received power and the first value, and the fourth target received power is greater than the first target received power; or, In a case where the first target received power is a single target received power for transmitting the leading sequence corresponding to the first number of repeated transmissions determined according to the indication information, the target received power for the single transmission of the leading sequence is determined based on a third target received power and the first value, and the third target received power is equal to the first target received power.

35. The device according to claim 33 or 34, characterized in that The target received power of the single transmission of the preamble sequence is determined according to the first target received power and the first value, including: The first target received power is a linear value. When the first value is a linear value, the target received power of the single transmission of the preamble sequence is determined according to the product of the first target received power and the first value, and the first value is a positive number greater than 1; or, The first target received power is a logarithmic value. When the first value is a logarithmic value, the target received power of the single transmission of the preamble sequence is determined according to the sum of the first target received power and the first value, and the first value is a positive number greater than 0; or, The first target received power is a logarithmic value. When the first value is a linear value, the target received power of the single transmission of the leading sequence is determined based on the sum of the logarithmic value corresponding to the first value and the first target received power, and the first value is a positive number greater than 1.

36. The device according to any one of claims 29 to 35, characterized in that The second number of repeated transmissions corresponds to at least two target received powers, and the at least two target received powers include a second target received power.

37. A communication device, characterized in that: include: A transceiver unit, configured to send indication information, wherein the indication information is used to indicate the number of repetitions of the preamble sequence repeatedly sent by the terminal device on a physical random access channel PRACH resource, and a target received power corresponding to the number of repetitions, wherein the number of repetitions includes a second number of repetitions, and the second number of repetitions corresponds to at least two of the target received powers; The transceiver unit is also used to receive the preamble sequence sent by the terminal device, the transmission power of the terminal device corresponding to the preamble sequence is determined based on a first target receiving power, the first number of repeated transmissions is one of the at least two target receiving powers, the first number of repeated transmissions is less than the second number of repeated transmissions, and the second number of repeated transmissions is the number of repeated transmissions that is closest to the first number of repeated transmissions among the number of repeated transmissions.

38. The device according to claim 36 or 37, characterized in that The indication information is used to indicate the second number of repeated transmissions and the at least two target received powers corresponding to the second number of repeated transmissions, wherein the at least two target received powers also include the first target received power. or, The indication information is used to indicate the second number of repeated transmissions, as well as the second target received power and at least one target power offset value corresponding to the second number of repeated transmissions, and the at least one target power offset value is used to determine the first target received power.

39. A communication device, characterized in that: include: A processor, configured to execute computer instructions stored in the memory so that the apparatus performs: a method as claimed in any one of claims 1 to 19.

40. The device according to claim 39, characterized in that The apparatus also includes the memory.

41. The device according to claim 39 or 40, characterized in that The device also includes a communication interface coupled to the processor. The communication interface is used to input and / or output information.

42. The device according to any one of claims 39 to 41, characterized in that The device is a chip.

43. A computer program, characterized in that When the computer program is executed by a communication device, the method according to any one of claims 1 to 19 is implemented.

44. A computer-readable storage medium, characterized in that The storage medium stores a computer program or an instruction, and when the computer program or the instruction is executed by the communication device, the method according to any one of claims 1 to 19 is implemented.

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