Power control method and apparatus, communication device, and storage medium

Abstract

The present disclosure relates to a power control method, device, communication device and storage medium. The method comprises: receiving first information sent by a network device, the first information being used to trigger a terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information being used to determine the transmission power of the RACH; determining the transmission power of the RACH based on the first information; and sending the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used to determine the timing advance (TA) of the terminal to the candidate cell. The transmission power of the RACH sent by the terminal to the network device is determined through the first information, so that the transmission power of the RACH can be determined more accurately, and the accuracy of TA measurement is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and particularly relates to a power control method and device, a communication device and a storage medium. BACKGROUND

[0002] When a terminal switches from a source cell of a network device to a candidate cell, for example, in a layer 1 / layer 2 (L1 / L2) based inter-cell mobility (LTM) scenario, in order to complete the switching as soon as possible, it is necessary to measure the timing advance (TA) of each candidate cell in advance. SUMMARY

[0003] The present disclosure provides a power control method and device, a communication device and a storage medium.

[0004] According to a first aspect of the present disclosure, a power control method is provided, which is executed by a terminal, and the method comprises: receiving first information sent by a network device, the first information being used to trigger the terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information being used for the terminal to determine the transmission power of the RACH; determining the transmission power of the RACH based on the first information; and sending the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used to determine the timing advance (TA) of the terminal to the candidate cell.

[0005] According to a second aspect of the present disclosure, a power control method is provided, which is executed by a network device, and the method comprises: sending first information, the first information being used to trigger a terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information being used for the terminal to determine the transmission power of the RACH; and receiving, by the candidate cell of the network device, the RACH sent by the terminal based on the transmission power of the RACH, the RACH being used to determine the timing advance (TA) of the terminal to the candidate cell.

[0006] According to a third aspect of embodiments of the present disclosure, a power control method is provided for a communication system, the method comprising: sending, by a network device, first information, the first information being used to trigger a terminal to send a random access channel to a candidate cell of the network device, and the first information being used for the terminal to determine a transmission power of the RACH; receiving, by the terminal, the first information sent by the network device; determining, by the terminal, the transmission power of the RACH based on the first information; sending, by the terminal, the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used to determine a timing advance (TA) of the terminal to the candidate cell; and receiving, by the candidate cell of the network device, the RACH sent by the terminal based on the transmission power of the RACH.

[0007] According to a fourth aspect of embodiments of the present disclosure, a first power control apparatus is provided, the apparatus comprising: a receiving module configured to receive first information sent by a network device, the first information being used to trigger a terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information being used for the terminal to determine a transmission power of the RACH; a processing module configured to determine the transmission power of the RACH based on the first information; and a sending module configured to send the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used to determine a timing advance (TA) of the terminal to the candidate cell.

[0008] According to a fifth aspect of embodiments of the present disclosure, a second power control apparatus is provided, the apparatus comprising: a sending module configured to send first information, the first information being used to trigger a terminal to send a random access channel to a candidate cell of a network device, and the first information being used for the terminal to determine a transmission power of the RACH; and a receiving module configured to receive, by the candidate cell of the network device, the RACH sent by the terminal based on the transmission power of the RACH, the RACH being used to determine a timing advance (TA) of the terminal to the candidate cell.

[0009] According to a sixth aspect of embodiments of the present disclosure, a communication device is provided, comprising: one or more processors; and wherein the processors are configured to invoke instructions to cause the communication device to perform the power control method of any one of the first aspect or the second aspect.

[0010] According to a seventh aspect of embodiments of the present disclosure, a communication system is provided, comprising a terminal and a network device, wherein the terminal is configured to implement the power control method of any one of the first aspect, and the network device is configured to implement the power control method of any one of the second aspect.

[0011] According to an eighth aspect of the embodiments of the present disclosure, a storage medium is provided, and the storage medium stores instructions. When the instructions run on a communication device, the communication device performs the power control method in any one of the first aspect or the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following describes the drawings required for the embodiments, and the following drawings are only some embodiments of the present disclosure, and do not specifically limit the protection scope of the present disclosure.

[0013] Figure 1 a is a communication system architecture diagram according to an embodiment of the present disclosure.

[0014] Figure 1 b is an inter-cell handover diagram according to an embodiment of the present disclosure

[0015] Figure 2 is an interaction diagram of a power control method according to an embodiment of the present disclosure.

[0016] Figure 3a is a flowchart of a power control method according to an embodiment of the present disclosure.

[0017] Figure 3b is a flowchart of a power control method according to an embodiment of the present disclosure.

[0018] Figure 4a is a flowchart of a power control method according to an embodiment of the present disclosure.

[0019] Figure 4b is a flowchart of a power control method according to an embodiment of the present disclosure.

[0020] Figure 5 is a flowchart of a power control method according to an embodiment of the present disclosure.

[0021] Figure 6 is a power control method diagram according to an embodiment of the present disclosure.

[0022] Figure 7a is a power control device diagram according to an embodiment of the present disclosure.

[0023] Figure 7b is a power control device diagram according to an embodiment of the present disclosure.

[0024] Figure 8a is a communication device diagram according to an exemplary embodiment.

[0025] Figure 8b is a chip structure diagram according to an exemplary embodiment. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure.

[0027] The terminal determines the TA to each candidate cell based on the random access channel (RACH), but how the terminal transmits the RACH to the candidate cells with an appropriate transmission power is a problem that needs to be solved.

[0028] Embodiments of this disclosure provide power control methods, apparatus, communication devices, and storage media.

[0029] In a first aspect, embodiments of this disclosure provide a power control method executed by a terminal. The method includes: receiving first information sent by a network device, the first information being used to trigger the terminal to send a Random Access Channel (RACH) to a candidate cell of the network device, and the first information being used by the terminal to determine the transmission power of the RACH; determining the transmission power of the RACH based on the first information; and sending the RACH to a candidate cell of the network device based on the transmission power of the RACH, the RACH being used to determine the TA (Transmission Access Communication) from the terminal to the candidate cell.

[0030] In the above embodiments, the transmission power of RACH is determined by the first information to ensure that the terminal can transmit RACH with an appropriate transmission power, thereby improving the accuracy of TA measurement of candidate cells.

[0031] In conjunction with some embodiments of the first aspect, in some embodiments, the first information is used to indicate a first value of RACH, the first value being used to indicate the amount of transmit power adjustment of RACH.

[0032] In the above embodiments, the transmission power adjustment amount of RACH is determined by the first information to ensure that the terminal can transmit RACH with an appropriate transmission power, thereby improving the accuracy of TA measurement of candidate cells.

[0033] In conjunction with some embodiments of the first aspect, in some embodiments, the first information includes a first field, and different values ​​of the first field correspond to different first values.

[0034] In the above embodiments, different first values ​​are determined by different values ​​of the first field, and different first values ​​can be determined based on the actual situation, thereby improving the accuracy of the terminal in determining the transmission power of RACH.

[0035] In conjunction with some embodiments of the first aspect, in some embodiments, determining the transmission power of the RACH based on first information includes: determining the transmission power of the RACH based on a first value.

[0036] In the above embodiments, determining the RACH transmission power using the first value enables a more accurate determination of the terminal's RACH transmission power, thereby improving the accuracy of TA measurement for candidate cells.

[0037] In conjunction with some embodiments of the first aspect, in some embodiments, the transmission power of RACH is determined based on a first value, satisfying the following relationship:

[0038] P RACH =min{P CMAX ,P traget +PL+δ}

[0039] Among them, P RACH P represents the transmit power of RACH. CMAX P represents the maximum transmission power. traget denoted by RACH target received power, PL represents path loss determined based on downlink reference signal, and δ represents the first value.

[0040] In the above embodiments, the above formula can more accurately determine the transmission power of the RACH sent by the terminal, thereby improving the accuracy of TA measurement of candidate cells.

[0041] In conjunction with some embodiments of the first aspect, in some embodiments, determining the transmission power of RACH based on first information includes: determining the transmission power based on a second value, wherein the second value is determined based on the first value received within a first time period.

[0042] In the above embodiments, a second value can be determined based on a first value received within a first time period, and the transmission power can be determined based on the second value, thereby more accurately determining the transmission power of the terminal to transmit RACH, ensuring that the terminal can transmit RACH with an appropriate transmission power, and improving the accuracy of TA measurement of candidate cells.

[0043] In conjunction with some embodiments of the first aspect, in some embodiments, the transmission power is determined based on the second value, satisfying the following relationship:

[0044] P RACH =min{P CMAX ,P traget +PL+Δ}

[0045] Among them, P RACH P represents the transmit power of RACH. CMAX P represents the maximum transmission power. traget Indicates the target receive power of RACH.PL represents path loss determined based on a downlink reference signal, and Δ represents a second value.

[0046] In the above embodiment, the sending power is determined based on the second value, and the sending power of the terminal sending the RACH is determined more accurately, so that the terminal can send the RACH by using appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0047] In combination with some embodiments of the first aspect, in some embodiments, the first information is used to indicate whether the RACH currently sent by the terminal to the candidate cell belongs to the retransmitted RACH.

[0048] In the above embodiment, based on the first information, it can be determined whether the RACH currently sent by the terminal to the candidate cell belongs to the retransmitted RACH, and it is determined whether the sending power of the RACH needs to be lifted, so that the terminal can send the RACH by using appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0049] In combination with some embodiments of the first aspect, in some embodiments, the first information indicates that the RACH currently sent by the terminal to the candidate cell belongs to the retransmitted RACH, and the number of retransmissions of the RACH is determined.

[0050] In the above embodiment, based on the first information, the number of retransmissions of the RACH is determined, and the sending power of the terminal sending the RACH is lifted based on the number of retransmissions, so that the terminal can send the RACH by using appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0051] In combination with some embodiments of the first aspect, in some embodiments, the number of retransmissions of the RACH is determined, including: introducing a counter corresponding to the candidate cell at the terminal side, when the first information indicates that the RACH triggered by the terminal to the candidate cell is a retransmission, the counter is incremented by one, and the number of retransmissions of the RACH triggered by the terminal to the candidate cell is determined based on the value corresponding to the counter of the candidate cell; wherein different candidate cells correspond to different counters.

[0052] In the above embodiment, the RACH triggered by the first information to the candidate cell belongs to the retransmission of the first time or not is determined by the counter of the candidate cell, and the sending power of the terminal sending the RACH is determined based on the number of retransmissions, so that the terminal can send the RACH by using appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0053] In some embodiments of the first aspect, in some embodiments, the first information indicates that the RACH currently sent by the terminal to the candidate cell does not belong to the retransmission of the RACH or a beam change (or a SSB index change of the RACH sent by the terminal to the candidate cell) of the RACH indicated by the first information to the terminal, and the counter of the candidate cell is reset to 1.

[0054] In the above embodiments, by determining through the first information that the RACH triggered this time and initiated to the candidate cell does not belong to the retransmission of the RACH or the beam change of the RACH sent by the terminal to the candidate cell or the SSB index change of the RACH sent by the terminal to the candidate cell, the counter of the candidate cell is reset to 1, so that the number of retransmissions determined by the terminal based on the counter is not accurate when the RACH is retransmitted next time.

[0055] In some embodiments of the first aspect, in some embodiments, the sending power of the RACH is determined based on the number of retransmissions of the RACH and the power boosting value, including: determining the sending power of the RACH based on the number of retransmissions of the RACH and the power boosting value.

[0056] In the above embodiments, the sending power of the RACH is more accurately determined based on the number of retransmissions of the RACH and the power boosting value, so that the terminal can send the RACH through appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0057] In some embodiments of the first aspect, in some embodiments, the sending power of the RACH is determined based on the number of retransmissions of the RACH and the power boosting value, and the following relationship is satisfied:

[0058] P RACH = min{P CMAX ,P traget + PL}

[0059] Wherein, P RACH represents the sending power of the RACH, P CMAX represents the maximum sending power, and P traget= preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) * STEP, preambleReceivedTargetPower represents an initial random access preamble power configured by the network device 102, DELTA_PREAMBLE is a power offset value determined based on a preamble format, COUNTER represents a retransmission number of the RACH, STEP represents a power boosting value, and PL represents a path loss determined based on a downlink reference signal. In the above embodiment, the sending power of the RACH sent by the terminal is determined based on the above formula, so that the terminal can send the RACH by using appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0060] With reference to some embodiments of the first aspect, in some embodiments, the first information is used to indicate the first value of the RACH, and the first information is used to indicate whether the RACH sent by the terminal to the candidate cell this time belongs to the retransmitted RACH.

[0061] In the above embodiment, the first information indicates the first value of the RACH, and the first information also indicates whether the RACH sent by the terminal to the candidate cell belongs to the retransmitted RACH, and then the sending power of the RACH sent by the terminal is determined based on the first value and whether the RACH belongs to the retransmitted RACH, so that the terminal can send the RACH by using appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0062] With reference to some embodiments of the first aspect, in some embodiments, the sending power of the RACH is determined based on the first information, including: determining the sending power of the RACH based on the first value, the retransmission number of the RACH, and the power boosting value.

[0063] In the above embodiment, the sending power of the RACH sent by the terminal can be more accurately determined based on the first value, the retransmission number of the RACH, and the power boosting value, so that the terminal can send the RACH by using appropriate sending power, and the accuracy of the TA measurement of the candidate cell is improved.

[0064] With reference to some embodiments of the first aspect, in some embodiments, the sending power of the RACH is determined based on the first value, the retransmission number of the RACH, and the power boosting value, and the following relationship is met:

[0065] P RACH = min{P CMAX ,P traget + PL + δ}

[0066] wherein P RAC represents the sending power of the RACH, P CMAXP traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) * STEP, preambleReceivedTargetPower represents an initial random access preamble power configured by the network device 102, DELTA_PREAMBLE is a power offset value determined based on a preamble format, COUNTER represents a retransmission number of the RACH, STEP represents the power boosting value, PL represents a loss based on a downlink reference signal, and δ represents the first value.

[0067] In the above embodiment, the terminal can transmit the RACH by using the appropriate transmission power based on the above formula, and the accuracy of the TA measurement of the candidate cell is improved.

[0068] In some embodiments of the first aspect, based on the first information, the transmission power of the RACH is determined based on the second value, the retransmission number of the RACH, and the power boosting value, and the second value is determined based on the first value received in the first time period.

[0069] In the above embodiment, the terminal can transmit the RACH by using the appropriate transmission power based on the second value, the retransmission number of the RACH, and the power boosting value, and the accuracy of the TA measurement of the candidate cell is improved.

[0070] In some embodiments of the first aspect, the transmission power of the RACH is determined based on the second value, the retransmission number of the RACH, and the power boosting value, and the following relationship is satisfied:

[0071] P RACH = min{P CMAX , P traget + PL + Δ}. Wherein, P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, and P traget= preambleReceivedTargetPower + DELTA PREAMBLE + (COUNTER - 1) * STEP, preambleReceivedTargetPower represents an initial random access preamble power configured by the network device 102, DELTA PREAMBLE is a power offset value determined based on a preamble format, COUNTER represents a retransmission number of the RACH, STEP represents the power boosting value, PL represents a path loss determined based on a downlink reference signal, and Δ represents the second value.

[0072] In the above embodiment, the terminal can transmit the RACH by using the appropriate transmission power based on the above formula, and the accuracy of the TA measurement of the candidate cell is improved.

[0073] In some embodiments of the first aspect, in some embodiments, the second value satisfies the following relationship:

[0074]

[0075] wherein Δ represents the second value, i represents the current moment, k represents any moment before the current moment, and δ m represents the mth received first value.

[0076] In the above embodiment, the second value is determined based on the first value in a period of time, and then the transmission power of the RACH transmitted by the terminal is determined based on the second value, so that the terminal can transmit the RACH by using the appropriate transmission power, and the accuracy of the TA measurement of the candidate cell is improved.

[0077] In some embodiments of the first aspect, in some embodiments, the first information indicates a beam change or an SSB index change of the RACH transmitted by the terminal, and the second value is a preset value.

[0078] In the above embodiment, the first information indicates the beam change or the SSB index change of the RACH transmitted by the terminal, and the second value is the preset value, so that the influence of the second value on the transmission power of the RACH is avoided, the terminal can transmit the RACH by using the appropriate transmission power, and the accuracy of the TA measurement of the candidate cell is improved.

[0079] In the second aspect, the embodiments of the present disclosure provide a power control method, which is performed by a network device, and the method comprises the following steps: transmitting first information, the first information being used to trigger a terminal to transmit a random access channel (RACH) to a candidate cell, and the first information being used for the terminal to determine transmission power of the RACH; and the candidate cell of the network device receives the RACH transmitted by the terminal based on the transmission power of the RACH, and the RACH is used to determine a timing advance (TA) of the terminal to the candidate cell.

[0080] In some embodiments of the second aspect, in some embodiments, the first information is used to indicate a first value of the RACH, and the first value is used to indicate an amount of transmission power adjustment of the RACH.

[0081] In some embodiments of the second aspect, in some embodiments, the first information comprises a first field, and different values of the first field correspond to different first values.

[0082] In some embodiments of the second aspect, in some embodiments, the first information is used by the terminal to determine the transmission power of the RACH based on the first value.

[0083] In some embodiments of the second aspect, in some embodiments, the first information is used by the terminal to determine the transmission power of the RACH based on the following manner:

[0084] P RACH = min{P CMAX , P traget + PL + δ}

[0085] wherein P RACH denotes the transmission power of the RACH, P CMAX denotes the maximum transmission power, P traget denotes the target reception power of the RACH, PL denotes the path loss determined based on the downlink reference signal, and δ denotes the first value.

[0086] In some embodiments of the second aspect, in some embodiments, the first information is used by the terminal to determine the transmission power of the RACH based on a second value, and the second value is determined based on the first values received within a first time period.

[0087] In some embodiments of the second aspect, in some embodiments, the first information is used by the terminal to determine the transmission power of the RACH based on the following manner:

[0088] P RACH = min{P CMAX , P target + PL + Δ}

[0089] wherein P RACH denotes the transmission power of the RACH, P CMAX denotes the maximum transmission power, P traget denotes the target reception power of the RACH, PL denotes the path loss determined based on the downlink reference signal, and Δ denotes the second value. PL

[0090] In some embodiments of the second aspect, in some embodiments, the first information is used to indicate whether the RACH currently transmitted by the terminal to the candidate cell belongs to the retransmitted RACH. ​

[0091] In the above embodiment, the first information is used to indicate whether the RACH sent by the terminal to the candidate cell belongs to the retransmitted RACH, so that the terminal determines whether to perform the power boosting, thereby improving the accuracy of the TA measurement of the candidate cell.

[0092] In combination with some embodiments of the second aspect, in some embodiments, the RACH sent by the terminal last time for measuring the TA is not received, and the first indication information is used to indicate that the RACH sent by the terminal to the candidate cell currently belongs to the retransmission.

[0093] In the above embodiment, the network device determines that the RACH sent by the terminal last time for measuring the TA is not received, and the first information is used to indicate that the RACH sent by the terminal to the candidate cell belongs to the retransmitted RACH, so that the terminal determines to perform the power boosting, thereby improving the accuracy of the TA measurement of the candidate cell.

[0094] In combination with some embodiments of the second aspect, in some embodiments, the RACH sent by the terminal last time for measuring the TA is successfully received, and the first indication information is used to indicate that the RACH sent by the terminal to the candidate cell currently does not belong to the retransmission.

[0095] In the above embodiment, the network device determines that the RACH sent by the terminal last time for measuring the TA is successfully received, and the first information is used to indicate that the RACH sent by the terminal to the candidate cell does not belong to the retransmitted RACH, so that the terminal determines that the power boosting can not be performed.

[0096] In combination with some embodiments of the second aspect, in some embodiments, the first information is used to indicate that the RACH sent by the terminal to the candidate cell currently belongs to the retransmitted RACH, and the first information is used for the terminal to determine the number of retransmissions of the RACH.

[0097] In combination with some embodiments of the second aspect, in some embodiments, the first information is used to indicate that the RACH sent by the terminal to the candidate cell currently does not belong to the retransmitted RACH or the beam of the RACH sent by the terminal to the candidate cell changes or the SSB index of the RACH sent by the terminal to the candidate cell changes, and the first information is used for the terminal to determine that the counter of the candidate cell is reset to 1.

[0098] In combination with some embodiments of the second aspect, in some embodiments, the first information is used to indicate that the terminal determines the transmission power of the RACH based on the number of retransmissions of the RACH and the power boosting value.

[0099] In combination with some embodiments of the second aspect, in some embodiments, the first information is used to indicate that the terminal determines the transmission power of the RACH based on the following manner:

[0100] P RACH = min{P CMAX ,P traget + PL}

[0101] wherein P RACH denotes the transmission power of the RACH, P CMAX denotes the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower denotes the initial random access preamble power configured by the network device 102, DELTA_PREAMBLE is a power offset value determined based on the preamble format, COUNTER denotes the retransmission number of the RACH, STEP denotes the power boosting value, and PL denotes the path loss determined based on the downlink reference signal.

[0102] In some embodiments in combination with the second aspect, in some embodiments, the first information is used to indicate the first value of the RACH, and the first information is used to indicate whether the RACH transmitted by the terminal to the candidate cell belongs to the retransmitted RACH.

[0103] In some embodiments in combination with the second aspect, in some embodiments, the first information is used to indicate the first value of the terminal, the retransmission number of the RACH, and the power boosting value, and the transmission power of the RACH is determined.

[0104] In some embodiments in combination with the second aspect, in some embodiments, the first information is used to indicate that the terminal determines the transmission power of the RACH based on the following manner:

[0105] P RACH = min{P CMAX ,P traget + PL + δ}

[0106] wherein P RAC denotes the transmission power of the RACH, P CMAX denotes the maximum transmission power, P traget= preambleReceivedTargetPower + DELTA PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower represents an initial random access preamble power configured by the network device 102, DELTA PREAMBLE represents a power offset value determined based on a preamble format, COUNTER represents a retransmission number of the RACH, STEP represents the power boosting value, PL represents a path loss determined based on a downlink reference signal, and D represents the first value.

[0107] In some embodiments of the second aspect, in some embodiments, the first information is used to instruct the terminal to determine the transmission power of the RACH based on the second value, the retransmission number of the RACH, and the power boosting value, and the second value is determined based on the first value received in the first time period.

[0108] In some embodiments of the second aspect, in some embodiments, the first information is used to instruct the terminal to determine the transmission power of the RACH based on the following manner:

[0109] P RACH = min{P CMAX ,P traget + PL + D}

[0110] wherein P RAC represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower represents an initial random access preamble power configured by the network device 102, DELTA PREAMBLE represents a power offset value determined based on a preamble format, COUNTER represents a retransmission number of the RACH, STEP represents the power boosting value, PL represents a path loss determined based on a downlink reference signal, and D represents the second value.

[0111] In some embodiments of the second aspect, in some embodiments, the second value satisfies the following relationship:

[0112]

[0113] wherein D represents the second value, i represents a current time, k represents any time before the current time, and D m represents the first value received for the mth time.

[0114] In some embodiments of the second aspect, in some embodiments, the first information indicates that the terminal sends a beam change or an SSB index change of the RACH, and the first information is used for the terminal to determine that the second value is a preset value.

[0115] In a third aspect, the embodiments of the present disclosure provide a power control method for a communication system. The method comprises: a network device sending first information, the first information being used for triggering a terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information being used for the terminal to determine a transmission power of the RACH; the terminal receiving the first information sent by the network device; the terminal determining the transmission power of the RACH based on the first information; the terminal sending the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used for determining a timing advance (TA) of the terminal to the candidate cell; and the candidate cell of the network device receiving the RACH sent by the terminal based on the transmission power of the RACH.

[0116] In the above embodiments, the transmission power of the RACH sent by the terminal is determined through the first information, so that the terminal can send the RACH through a suitable transmission power, and the accuracy of TA measurement of the candidate cell is improved.

[0117] In a fourth aspect, the embodiments of the present disclosure provide a first power control apparatus. The apparatus comprises: a receiving module configured to receive first information sent by a network device, the first information being used for triggering a terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information being used for the terminal to determine a transmission power of the RACH; a processing module configured to determine the transmission power of the RACH based on the first information; and a sending module configured to send the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used for determining a timing advance (TA) of the terminal to the candidate cell.

[0118] In a fifth aspect, the embodiments of the present disclosure provide a second power control apparatus. The apparatus comprises: a sending module configured to send first information, the first information being used for triggering a terminal to send a random access channel (RACH) to a candidate cell of a network device, and the first information being used for the terminal to determine a transmission power of the RACH; and a receiving module configured to receive, by the candidate cell of the network device, the RACH sent by the terminal based on the transmission power of the RACH, the RACH being used for determining a timing advance (TA) of the terminal to the candidate cell.

[0119] In a sixth aspect, the embodiments of the present disclosure provide a communication device. The communication device comprises one or more processors. The processor is configured to invoke instructions to enable the communication device to perform the power control method of any one of the first aspect and the second aspect.

[0120] In a seventh aspect, the embodiments of the present disclosure provide a communication system, comprising a terminal and a network device, wherein the terminal is configured to implement any of the power control methods in the first aspect, and the network device is configured to implement any of the power control methods in the second aspect.

[0121] In an eighth aspect, the embodiments of the present disclosure provide a storage medium, which stores instructions, and the instructions, when executed on a communication device, cause the communication device to perform any of the power control methods in the first aspect and the second aspect.

[0122] In a ninth aspect, the embodiments of the present disclosure provide a program product, which, when executed on a communication device, causes the communication device to perform the methods described in the first aspect and the second aspect, and the optional implementation of the third aspect.

[0123] In a tenth aspect, the embodiments of the present disclosure provide a computer program, which, when executed on a computer, causes the computer to perform the methods described in the first aspect and the third aspect, and the optional implementation of the third aspect.

[0124] It can be understood that the first communication device, the second communication device, the communication device, the communication system, the storage medium, the program product, and the computer program are all used to execute the methods provided by the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved thereby can refer to the beneficial effects in the corresponding methods, which will not be described here again.

[0125] The embodiments of the present disclosure propose a power control method, device, equipment, system, and storage medium. In some embodiments, the terms of the power control method and the communication method, the information processing method, and the like can be replaced with each other, the terms of the power control and the communication device, the information processing device, and the like can be replaced with each other, and the terms of the information processing system and the communication system can be replaced with each other.

[0126] The embodiments of the present disclosure are not exhaustive, but are only a part of the embodiments, and are not specific limitations on the protection scope of the present disclosure. In the case of no contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily, for example, the scheme after removing some steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be exchanged arbitrarily, in addition, the optional implementation in an embodiment can be combined arbitrarily; in addition, the embodiments can be combined arbitrarily, for example, the steps of different embodiments or all the steps of different embodiments can be combined arbitrarily, an embodiment can be combined with the optional implementation of other embodiments arbitrarily.

[0127] In the embodiments of the present disclosure, the terms and / or descriptions between the embodiments are consistent if there is no special description and logical conflict, and can be referred to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0128] The terms used in the embodiments of the present disclosure are only for the purpose of describing particular embodiments and are not used as limitations of the present disclosure.

[0129] In the embodiments of the present disclosure, unless otherwise specified, the elements expressed in singular form, such as "one", "a", "the", "above", "said", "preceding", "this" and the like, can represent "one and only one", or "one or more", "at least one" and the like. For example, in the case of using articles such as "a", "an", "the" in English, the noun after the article can be understood as singular expression, or as plural expression.

[0130] In the embodiments of the present disclosure, "plurality" means two or more.

[0131] In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple" and the like can be replaced with each other.

[0132] In the embodiments of the present disclosure, the description mode such as "at least one of A, B, C", "A and / or B and / or C" and the like includes any one of A, B, C exists alone, and also includes any combination of any multiple of A, B, C, and each case can exist alone; for example, "at least one of A, B, C" includes single A, single B, single C, A and B combination, A and C combination, B and C combination, A and B and C combination; for example, A and / or B includes single A, single B, combination of A and B.

[0133] In some embodiments, the description mode such as "A in one case, B in another case", "in response to one case A, in response to another case B" and the like can include the following technical solutions according to the case: A is executed regardless of B, that is, A in some embodiments; B is executed regardless of A, that is, B in some embodiments; A and B are selectively executed, that is, A and B are selected from A and B in some embodiments; A and B are both executed, that is, A and B in some embodiments. When there are more branches such as A, B, C, the above is similar.

[0134] The prefix words "first", "second", etc. in the embodiments of the present disclosure are merely used to distinguish different description objects, and do not constitute limitation on the position, order, priority, quantity or content of the description objects. The description of the description objects should refer to the description in the context of the claims or embodiments, and should not constitute redundant limitation because of the use of the prefix words. For example, the description objects are "fields", and the ordinal words before "fields" in "first field" and "second field" do not limit the position or order between "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of "first field" and "second field". For another example, the description objects are "levels", and the ordinal words before "levels" in "first level" and "second level" do not limit the priority between "levels". For another example, the quantity of the description objects is not limited by the ordinal words, and can be one or more. For example, "first device", where the quantity of "devices" can be one or more. In addition, the objects modified by different prefix words can be the same or different. For example, the description objects are "devices", and "first device" and "second device" can be the same device or different devices, and their types can be the same or different. For another example, the description objects are "information", and "first information" and "second information" can be the same information or different information, and their contents can be the same or different.

[0135] In some embodiments, "including A", "containing A", "for indicating A", "carrying A" can be interpreted as directly carrying A, or indirectly indicating A.

[0136] In some embodiments, the terms "in response to", "in response to determining", "in the case of", "when", "when", "if", "if" and the like can be replaced with each other.

[0137] In some embodiments, the terms "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", "above" and the like can be replaced with each other, and the terms "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", "below" and the like can be replaced with each other.

[0138] In some embodiments, an apparatus or the like can be interpreted as an entity, and can also be interpreted as virtual, and the name thereof is not limited to the name described in the embodiments, and the terms "apparatus", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject" and the like can be replaced with each other.

[0139] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "carrier", "component carrier", "bandwidth part (BWP)" and the like can be replaced with each other.

[0140] In some embodiments, the terms "terminal," "terminal device," "user equipment (UE)," "user terminal," "mobile station (MS)," "mobile terminal (MT)," "subscriber station," "mobile unit," "subscriber unit," "wireless unit," "remote unit," "mobile device," "wireless device," "wireless communication device," "remote device," "mobile subscriber station," "access terminal," "mobile terminal," "wireless terminal," "remote terminal," "handset," "user agent," "mobile client," "client," and so on can be replaced with each other.

[0141] In some embodiments, the access network device, the core network device, or the network device can be replaced with a terminal. For example, the embodiments of the present disclosure can also be applied to a structure in which communication between the access network device, the core network device, or the network device and the terminal is replaced with communication between a plurality of terminals (for example, also referred to as device-to-device (D2D), vehicle-to-everything (V2X), and so on). In this case, the terminal can also be configured to have all or part of the functions of the access network device. In addition, the language of "uplink," "downlink," and so on can also be replaced with language corresponding to the inter-terminal communication (for example, "side"). For example, the uplink channel, the downlink channel, and so on can be replaced with the side channel, and the uplink, the downlink, and so on can be replaced with the side link.

[0142] In some embodiments, the terminal can be replaced with the access network device, the core network device, or the network device. In this case, the access network device, the core network device, or the network device can also be configured to have all or part of the functions of the terminal.

[0143] In some embodiments, the names of information and the like are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "field", "symbol", "symbol", "codebook", "codeword", "codepoint", "bit", "data", "program", "chip", and the like can be replaced with each other.

[0144] In some embodiments, terms such as "uplink", "uplink", "physical uplink", and the like can be replaced with each other, terms such as "downlink", "downlink", "physical downlink" and the like can be replaced with each other, terms such as "side", "sidelink", "sidelink communication", "sidelink communication", "direct connection", "direct connection link", "direct connection", "direct connection link communication" and the like can be replaced with each other.

[0145] In some embodiments, terms such as "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI", and the like can be replaced with each other.

[0146] In some embodiments, terms such as "physical downlink shared channel (PDSCH)", "DL data", and the like can be replaced with each other, and terms such as "physical uplink shared channel (PUSCH)", "UL data", and the like can be replaced with each other.

[0147] In some embodiments, terms such as "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like can be replaced with each other.

[0148] In some embodiments, the terms “search space”, “search space set”, “search space configuration”, “search space set configuration”, “control resource set (CORESET)”, “CORESET configuration”, and the like can be replaced with each other.

[0149] In some embodiments, the terms “synchronization signal (SS)”, “synchronization signal block (SSB)”, “reference signal (RS)”, “pilot”, “pilot signal”, and the like can be replaced with each other.

[0150] In some embodiments, the terms “time instant”, “time point”, “time”, “time location”, and the like can be replaced with each other, and the terms “time duration”, “time period”, “time window”, “window”, “time”, and the like can be replaced with each other.

[0151] In some embodiments, the terms “component carrier (CC)”, “cell”, “frequency carrier”, “carrier frequency”, and the like can be replaced with each other.

[0152] In some embodiments, the terms “resource block (RB)”, “physical resource block (PRB)”, “sub-carrier group (SCG)”, “resource element group (REG)”, “PRB pair”, “RB pair”, “resource element (RE)”, and the like can be replaced with each other.

[0153] In some embodiments, the terms “wireless access scheme”, “waveform”, and the like can be replaced with each other.

[0154] In some embodiments, the terms “precoding,” “precoder,” “weight,” “precoding weight,” “quasi-co-location (QCL),” “transmission configuration indication (TCI) state,” “spatial relation,” “spatial domain filter,” “transmission power,” “phase rotation,” “antenna port,” “antenna port group,” “layer,” “the number of layers,” “rank,” “resource,” “resource set,” “resource group,” “beam,” “beam width,” “beam angular degree,” “antenna,” “antenna element,” “panel,” and the like can be replaced with each other.

[0155] In some embodiments, the terms “frame,” “radio frame,” “subframe,” “slot,” “sub-slot,” “mini-slot,” “symbol,” “symbol,” “transmission time interval (TTI),” and the like can be replaced with each other.

[0156] In some embodiments, the terms “acquire,” “obtain,” “get,” “receive,” “transmit,” “bidirectional transmission,” “transmit and / or receive,” and the like can be replaced with each other, which can be interpreted as receiving from other subjects, acquiring from protocols, obtaining by oneself, autonomously implementing, and the like.

[0157] In some embodiments, the terms “transmit,” “emit,” “report,” “issue,” “transmit,” “bidirectional transmission,” “transmit and / or receive,” and the like can be replaced with each other.

[0158] In some embodiments, "predetermined" or "preset" can be interpreted as being previously stipulated in a protocol or the like, or as being previously set by the device or the like.

[0159] In some embodiments, "determining" can be interpreted as judging, deciding, judging, calculating, computing, processing, deriving, investigating, searching, looking up, searching, inquiring, ascertaining, receiving, transmitting, inputting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, "assuming", "expecting", "considering", broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, or the like, but is not limited thereto.

[0160] In some embodiments, the determining or judging can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values (for example, comparison with a predetermined value), but is not limited thereto.

[0161] In some embodiments, "network" can be interpreted as a device (for example, an access network device, a core network device, or the like) included in the network.

[0162] In some embodiments, "not expecting to receive" can be interpreted as not receiving in a time domain resource and / or a frequency domain resource, or as not performing subsequent processing on the data or the like after receiving the data or the like; "not expecting to send" can be interpreted as not sending, or as sending but not expecting a response to the content of the sending from the receiving side.

[0163] In some embodiments, obtaining data, information, or the like can comply with laws and regulations of the country where the device is located.

[0164] In some embodiments, data, information, and the like can be acquired after obtaining user consent.

[0165] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0166] Figure 1 a is a communication system architecture diagram shown according to the embodiments of the present disclosure.

[0167] As shown in Figure 1 a , the communication system 100 includes a terminal 101 and a network device 102.

[0168] In some embodiments, the network device 102 can include at least one of an access network device and a core network device.

[0169] In some embodiments, the terminal 101 includes at least one of a mobile phone, a wearable device, an Internet of Things device, a communication-capable automobile, a smart automobile, a Pad, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, a wireless terminal device in a smart home, and the like, but is not limited thereto.

[0170] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network, and can include at least one of an evolved NodeB (eNB), a next generation eNB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0171] In some embodiments, the technical solutions of the present disclosure can be applied to an Open RAN architecture, at this time, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be realized through software or programs.

[0172] In some embodiments, the access network device can be composed of a central unit (CU) and a distributed unit (DU), wherein the CU can also be referred to as a control unit. The CU-DU structure can split the protocol layers of the access network device, and some of the protocol layers are controlled by the CU, and the rest or all of the protocol layers are distributed in the DU and controlled by the CU, but is not limited thereto.

[0173] In some embodiments, the core network device can be one device, including one or more network elements, or can be multiple devices or device groups, including one or more network elements, or can be an entity. The core network includes, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0174] It can be understood that the communication system described in the embodiments of the present disclosure is for more clearly illustrating the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0175] The following embodiments of the present disclosure can be applied to the communication system 100 shown in FIG. 1 or part of the subject, but are not limited thereto. The subjects shown in FIG. 1 are exemplary, and the communication system can include all or part of the subjects in FIG. 1, or other subjects other than FIG. 1. The number and form of each subject is arbitrary, and the connection relationship between each subject is exemplary. Each subject can be connected or not connected, and the connection can be in any way, can be direct connection or indirect connection, can be wired connection or wireless connection.

[0176] Embodiments of the present disclosure can be applied to long term evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new-radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, ultra mobile broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra-wideband (UWB), Bluetooth (Bluetooth (registered trademark)), public land mobile network (PLMN) network, device-to-device (D2D) system, machine to machine (M2M) system, internet of things (IoT) system, vehicle-to-everything (V2X), system using other power control methods, next-generation system expanded based on them, and the like. In addition, a plurality of systems can be combined (for example, combination of LTE or LTE-A and 5G, and the like).

[0177] In the embodiments of the present disclosure, the network device can maintain a plurality of candidate cells for the terminal, and when the terminal needs to hand over the source cell, the terminal can select a candidate cell from the plurality of candidate cells as a target cell and hand over to the target cell.

[0178] Figure 1 bis a L1 / L2-based inter-cell mobility / LTM (handover) diagram according to an embodiment of the present disclosure.

[0179] As shown in FIG. 1, the current source cell of the terminal 101 is cell 1, and the network device 102 can pre-configure multiple candidate cells (for example, cell 2, cell 3 and cell 4) for the terminal 101. As the terminal 101 moves, when the network determines that handover is needed based on the L1 measurement (beam measurement) result, a cell can be selected from the multiple candidate cells as a target cell, for example, the terminal 101 moves from cell 1 to cell 3, and the terminal 101 can be handed over to cell 3. Figure 1 b

[0180] Optionally, the embodiments of the present disclosure also consider measuring the TA of the terminal 101 to each candidate cell in advance, so as to complete the handover faster when performing cell handover.

[0181] In the embodiments of the present disclosure, at least a measurement mode of triggering a random access channel (RACH) based on a physical downlink control channel (PDCCH) order is supported.

[0182] Optionally, in order to reduce the time overhead of the TA measurement of the candidate cell, in the RACH process in the LTM, the transmission of the random access response (RAR) can not be performed. If the network device 102 does not correctly receive the RACH, the network device 102 is allowed to trigger the RACH for TA measurement through the PDCCH order again. However, because the first reception of the RACH has failed, in order to make this transmission as successful as possible, the transmission power of the RACH to the candidate cell can be considered to be increased. In some embodiments, the transmission power of the terminal 101 to the candidate cell satisfies the following relationship:

[0183] P PRACH,b,f,c (i) = min{P CMAX,f,c (i), P PRACH,target,f,c + PL b,f,c}

[0184] Wherein, P CMAX,f,c max represents the maximum transmission power of the terminal 101, P PRACH,target,f,c target represents the target reception power of the PRACH, and PL b,f,c represents the loss based on the reference signal.

[0185] ​In the embodiments of the present disclosure, if the terminal 101 does not receive the RAR, the terminal 101 considers that the RACH sent to the candidate cell fails, and the terminal 101 will perform retransmission of the RACH and increase the transmission power.

[0186] Optionally, the terminal 101 gradually increases the value of P PRACH,target,f,c each time the terminal 101 retransmits the RACH to the candidate cell.

[0187] In some embodiments, the value of P PRACH,target,f,c satisfies the following relationship:

[0188] P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER-1) x PREAMBLE_POWER_RAMPING_STEP + POWER_OFFSET_2STEP_RA

[0189] wherein preambleReceivedTargetPower represents the initial random access preamble power, DELTA_PREAMBLE represents the power offset value determined based on the preamble format, PREAMBLE_POWER_RAMPING_COUNTER-1 represents the number of retransmissions, PREAMBLE_POWER_RAMPING_STEP represents the power increased each time, and POWER_OFFSET_2STEP_RA represents the value additionally increased in 2STEP.

[0190] Optionally, the value of preambleReceivedTargetPower is determined based on the network device 102 configuration, for example, the network device 102 configures preambleReceivedTargetPower for the terminal 101 based on the radio resource control (RRC) signaling.

[0191] Optionally, the value of DELTA_PREAMBLE is determined based on the table lookup of different physical channel formats. For example, tables TS38.321 7.3-1 and 7.3-2.

[0192] Optionally, the initial value of preambleReceivedTargetPower is 1, and the value is increased by one each time the RACH is retransmitted, and the maximum number of retransmissions is determined based on the network device 102 configuration. For example, based on the parameter preambleTransMax.

[0193] Optionally, the PREAMBLE_POWER_RAMPING_STEP is determined by the network device 102 configuration. For example, the PREAMBLE_POWER_RAMPING_STEP is determined based on a RRC configured parameter powerRampingStep.

[0194] Optionally, the measurement of the TA of the candidate cell is a continuous process. In order to obtain the latest TA of the candidate cell, the network device needs to trigger the terminal to initiate a RACH every certain period of time. It can be considered that the network device adjusts the power of the next RACH sent by the terminal according to the power of each received RACH.

[0195] In the embodiments of the present disclosure, even if the RACH triggered by the PDCCH order, the terminal 101 cannot adjust the power according to the received power of the last RACH at the network device 102 side. In addition, if the RACH does not have the RAR process, the terminal 101 cannot determine whether the network device 102 successfully receives the RACH according to the RAR, and cannot determine whether the RACH retransmission and power lifting to the candidate cell of the network device 102 are needed.

[0196] Figure 2 is a schematic diagram of the power control method interaction according to the embodiments of the present disclosure. As shown in Figure 2 The embodiments of the present disclosure relate to a power control method for a communication system 100, and the method comprises:

[0197] In step S2101, the network device 102 sends first information to the terminal 101.

[0198] In some embodiments, the terminal 101 receives the first information sent by the network device 102.

[0199] In some embodiments, the source cell of the network device 102 sends the first information to the terminal 101. Optionally, the source cell can also be referred to as a service cell, etc., which is not limited in the present disclosure.

[0200] In some embodiments, the terminal 101 receives the first information sent by the source cell of the network device 102.

[0201] In some embodiments, the first information is used to trigger the terminal 101 to send a RACH to the network device 102.

[0202] It is worth noting that the sending of the RACH by the terminal 101 to the network device 102 can be understood as the sending of the preamble by the terminal 101 to the network device 102. In the subsequent embodiments of the present disclosure, the sending of the RACH will be described. However, it should be understood that the sending of the RACH by the terminal 101 to the network device 102 can be replaced by the sending of the preamble by the terminal 101 to the network device 102.

[0203] In some embodiments, the first information is used to trigger the terminal 101 to send a RACH to a candidate cell of the network device 102.

[0204] In some embodiments, one network device 102 can maintain one or more candidate cells.

[0205] In some embodiments, the candidate cell is a candidate cell maintained by the network device 102 corresponding to the source cell.

[0206] In some embodiments, the first information is used to instruct / trigger the terminal 101 to initiate a random access to the network device 102.

[0207] In some embodiments, the first information is used to instruct / trigger the terminal 101 to initiate a random access to a candidate cell of the network device 102 103.

[0208] In some embodiments, the first information is used to indicate a transmission power parameter of the RACH.

[0209] In some embodiments, the transmission power parameter is used by the terminal 101 to determine the transmission power of the RACH.

[0210] In some embodiments, the name of the transmission power parameter is not limited, for example, it can be “transmission power parameter”, “transmission power parameter”, etc.

[0211] In some embodiments, the first information is used by the terminal 101 to determine the transmission power of the RACH.

[0212] It is worth noting that the transmission power of the RACH can be understood as the transmission power of the preamble, and the terminal 101 can send the preamble to the network device 102 based on the transmission power of the RACH. In subsequent embodiments of the disclosure, “transmission power of the RACH” will be described. However, it should be understood that the transmission power of the RACH can be replaced by the transmission power of the preamble.

[0213] It is worth noting that the name of the transmission power is not limited, for example, it can be “transmission power”, “transmission power”, etc., and the disclosure does not limit the name of the transmission power.

[0214] In some embodiments, the first information is, for example, “indication information”, “configuration information”, etc., and the disclosure does not limit the name of the first information.

[0215] In some embodiments, the first information can be downlink control information (Downlink control information, DCI).

[0216] In some embodiments, the network device 102 sends, to the terminal 101, a DCI including the first information. Optionally, the terminal 101 receives the DCI.

[0217] In some embodiments, the terminal 101 can determine the transmission power of the RACH.

[0218] In some embodiments, the first information is used to indicate a first value of the RACH.

[0219] In some embodiments, the first value is used to indicate an amount of transmission power adjustment of the RACH.

[0220] In some embodiments, the name of the first value is not limited, for example, “power adjustment value”, “amount of transmission power adjustment”, etc., and the disclosure does not limit the name of the first value.

[0221] In some embodiments, the first information includes a first field.

[0222] In some embodiments, different values of the first field are used to indicate different first values.

[0223] In some embodiments, the name of the first field is not limited, for example, “indication field”, “information indication field”, “transmission power control command”, etc., and the disclosure does not limit the name of the first field.

[0224] For example, as shown in Table 1, a correspondence table of the first field and the first value is provided.

[0225] Table 1

[0226] First domain First value 0 -2 1 -1 2 +1 3 +2

[0227] For example, when the value of the first field is 1, the first information is used to indicate that the first value of the RACH is -1.

[0228] It should be noted that the correspondence table of the first field and the first value is not limited to the correspondence shown in Table 1, and the disclosure does not limit the specific correspondence in the correspondence table of the first field and the first value.

[0229] In some embodiments, the first information is used to indicate whether the RACH currently transmitted by the terminal 101 to the network device 102 belongs to the retransmitted RACH.

[0230] Optionally, the RACH currently transmitted by the terminal 101 to the network device 102 can be understood as the RACH transmitted by the terminal to the network device 102 triggered by the first information this time.

[0231] In some embodiments, the first information is used to indicate whether the RACH currently transmitted by the terminal 101 to the candidate cell of the network device 102 belongs to the retransmitted RACH.

[0232] In some embodiments, the first information is used to indicate that the RACH currently transmitted by the terminal 101 to the network device 102 belongs to the retransmitted RACH when the network device 102 determines that the RACH last transmitted by the terminal 101 for measuring TA is not received.

[0233] In some embodiments, the first information is used to indicate that the RACH currently transmitted by the terminal 101 to the candidate cell of the network device 102 does not belong to the retransmitted RACH when the network device 102 determines that the RACH last transmitted by the terminal 101 for measuring TA is successfully received.

[0234] In some embodiments, the first information is used to indicate a first value of the RACH, and the first information is used to indicate whether the RACH currently transmitted by the terminal 101 to the candidate cell belongs to the retransmitted RACH.

[0235] In some embodiments, the first information is used to indicate a beam of the RACH transmitted by the terminal 101 to the candidate cell.

[0236] In step S2102, the terminal 101 determines the transmission power of the RACH based on the first information.

[0237] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the first information includes at least one of the following:

[0238] The first information indicates the first value, and the terminal 101 determines the transmission power of the RACH based on the first value;

[0239] The first information indicates the first value, and the terminal 101 determines the transmission power of the RACH based on the second value;

[0240] Optionally, the second value is determined based on the first value received within a first time period.

[0241] Optionally, the name of the second value is not limited, for example, it is “power adjustment value”, “transmission power adjustment amount” and the like, and the present disclosure does not limit the name of the second value.

[0242] Optionally, the name of the first time period is not limited, for example, it is “preset time period”, “time threshold” and the like, and the present disclosure does not limit the name of the first time period.

[0243] Optionally, the terminal 101 determines the first time period. In other embodiments, the network device 102 configures the first time period for the terminal. The first information indicates that the RACH triggered by the terminal 101 this time belongs to the retransmitted RACH, and the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH;

[0244] The first information indicates the first value, and the first information indicates that the RACH triggered by the terminal 101 this time belongs to the retransmission RACH. The terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH.

[0245] The first information indicates the first value, and the first information indicates that the RACH triggered by the terminal 101 this time belongs to the retransmission RACH. The terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH.

[0246] The first information indicates the first value, and the first information indicates that the RACH triggered by the terminal 101 this time belongs to the retransmission RACH. The terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH.

[0247] The first information indicates the first value, and the first information indicates that the RACH triggered by the terminal 101 this time belongs to the retransmission RACH. The terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH.

[0248] The first information indicates the first value, and the first information indicates that the RACH triggered by the terminal 101 this time belongs to the retransmission RACH. The terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH.

[0249] Optionally, the specific implementation of the first information indicating the first value can refer to the optional implementation of the first value in step S2101 and Figure 2 Other related parts of the embodiments involved are not described here.

[0250] Optionally, the terminal 101 determines the transmission power of the RACH based on the first value.

[0251] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the first value, which satisfies the following relationship: P RACH = min{P CMAX , P traget + PL + δ}.

[0252] In some embodiments, P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget represents the target reception power of the RACH, PL represents the path loss determined based on the downlink reference signal, and δ represents the first value. Optionally, P CMAX represents the maximum transmission power allowed by the terminal 101. P traget represents the target reception power of the RACH that the network device 102 can receive. Optionally, P CMAX , P tragetConfigured by the network device. Optionally, P CMAX Configured by the network device. Optionally, P traget Configured by the network device. Optionally, P

[0253] In some embodiments, the first information indicates that the beam of the RACH currently transmitted by the terminal 101 has changed (for example, the SSB index is different from the SSB index of the RACH last transmitted by the terminal 101), and in one implementation, regardless of the first value indicated by the first information, the transmission power of the current RACH satisfies the following relationship: P RACH = min{P CMAX , P target + PL}. Optionally, considering the first value indicated by the first information, the transmission power of the RACH satisfies the following relationship: P RACH = min{P CMAX , P target + PL + δ}.

[0254] Optionally, the terminal 101 determines the transmission power of the RACH based on the second value.

[0255] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the second value, the maximum transmission power of the terminal 101, the target reception power of the RACH, and the path loss.

[0256] Optionally, the terminal 101 determines the transmission power of the RACH based on the second value, which satisfies the following relationship:

[0257] P RACH = min{P CMAX , P target + PL + Δ}.

[0258] Optionally, P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget represents the target reception power of the RACH, PL represents the path loss determined based on the downlink reference signal, and Δ represents the second value. Optionally, the second value satisfies the following relationship: Optionally, Δ represents the second value, i represents the current time, k represents any time before the current time, and δ m represents the mth received first value.

[0259] In some embodiments, the first information indicates that the beam of the RACH currently transmitted by the terminal 101 has changed (e.g., the SSB index is different from the SSB index of the RACH last transmitted by the terminal 101), and the second value is a preset value. Optionally, the second value is 0. Optionally, the first value indicated by the first information is not considered, that is, the transmission power of the RACH satisfies the following relationship: P RACH = min{P CMAX , P target + PL}. Optionally, the first value indicated by the first information is considered, that is, the transmission power of the RACH satisfies the following relationship: P RACH = min{P CMAX , P target + PL + δ}.

[0260] Optionally, the first information is used to indicate whether the RACH triggered this time by the terminal 101 belongs to the retransmission RACH. Optionally, the terminal 101 determines whether the RACH transmitted by the terminal 101 belongs to the retransmission RACH based on the first information. Optionally, the first information is used to indicate whether the RACH transmitted by the terminal 101 to the candidate cell of the network device 102 belongs to the retransmission RACH. Optionally, the terminal 101 determines whether the RACH transmitted by the terminal 101 to the candidate cell of the network device 102 belongs to the retransmission RACH based on the first information.

[0261] Optionally, the terminal 101 determines that the RACH transmitted by the terminal 101 to the candidate cell belongs to the retransmission RACH based on the first information. Optionally, the terminal 101 needs to determine the number of retransmissions of the RACH.

[0262] Optionally, the terminal 101 determines the number of retransmissions of the RACH based on the counter. Optionally, the initial value of the counter is a preset value. For example, the preset value is 1. For another example, the initial value of the counter is configured by the network device 102. Optionally, the value of the counter has a maximum value. For example, the network device configures the maximum value of the counter.

[0263] In some embodiments, the terminal 101 determines that the RACH currently transmitted by the terminal 101 to the candidate cell belongs to the retransmission RACH based on the first information, increments the value corresponding to the counter corresponding to the candidate cell by one, and determines the number of retransmissions of the RACH triggered currently based on the current value of the counter of the candidate cell. For example, the current value of the counter of the candidate cell is 3, and the RACH triggered currently belongs to the third retransmission, which can also be understood as the number of retransmissions of the RACH is 3.

[0264] In some embodiments, different counters correspond to different candidate cells.

[0265] Optionally, the initial and maximum values ​​of the counters for different candidate cells can be the same or different. Optionally, the network device 102 configures the initial and maximum values ​​of the counters for different candidate cells respectively. Optionally, the number of RACH retransmissions sent by the terminal 101 to different candidate cells is determined based on the counters corresponding to the different candidate cells.

[0266] Optionally, terminal 101 determines the transmission power of RACH based on the number of RACH retransmissions.

[0267] In some embodiments, terminal 101 determines the transmission power of RACH based on the number of RACH retransmissions and the power boost value.

[0268] In some embodiments, terminal 101 determines the transmission power of RACH based on the number of RACH retransmissions and the power boost value, satisfying the following relationship:

[0269] P RACH =min{P CMAX ,P traget +PL}. Where P RACH P represents the transmit power of RACH. CMAX P represents the maximum transmission power. traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) × STEP, where preambleReceivedTargetPower represents the initial random access preamble power configured by network device 102, DELTA_PREAMBLE represents the power offset value determined based on the preamble format, COUNTER represents the number of RACH retransmissions, STEP represents the power boost value, and PL represents the path loss determined based on the downlink reference signal.

[0270] In some embodiments, STEP may reuse existing ramping values. In other embodiments, STEP is determined based on network device reconfiguration.

[0271] Optionally, the first information is used to indicate that the RACH sent by terminal 101 in this triggering is not a retransmitted RACH. Optionally, terminal 101 determines based on the first information that the RACH sent by terminal 101 to the candidate cell is not a retransmitted RACH. Optionally, the counter value of the candidate cell is reset. For example, the counter data of the candidate cell is reset to 1.

[0272] Optionally, the first information is used to indicate the beam of the RACH that the triggering terminal 101 sends to the candidate cell.

[0273] Optionally, terminal 101 determines the beam of the RACH sent by terminal 101 to the candidate cell based on the first information. Optionally, if the SSB index changes, it can be determined that the beam has changed, and the counter value of the candidate cell can be reset. For example, the counter data of the candidate cell can be reset to 1.

[0274] Optionally, terminal 101 determines the RACH transmission power based on the number of RACH retransmissions. Optional implementation methods can be found in [link to relevant documentation]. Figure 2 Optional implementation methods of step S2102, and Figure 2 Other related parts in the embodiments involved, such as the terminal 101 determining that the RACH sent by the terminal 101 to the candidate cell is a retransmitted RACH based on the first information, and the terminal 101 determining the optional implementation method of the RACH transmission power based on the number of RACH retransmissions, will not be elaborated here.

[0275] Optionally, the first information is used to indicate the first value of RACH, and the first information is used to indicate whether the RACH sent by the triggering terminal 101 to the candidate cell this time belongs to the retransmitted RACH.

[0276] Optionally, the first information is used to indicate the first value of RACH, and the first information is used to indicate that the RACH sent by the triggering terminal 101 to the candidate cell this time belongs to the retransmitted RACH.

[0277] Optionally, terminal 101 determines the transmission power of RACH based on the first value and the number of RACH retransmissions.

[0278] In some embodiments, terminal 101 determines the transmission power of RACH based on a first value, the number of RACH retransmissions, and a power boost value.

[0279] In some embodiments, terminal 101 determines the transmission power of RACH based on a first value, the number of RACH retransmissions, and a power boost value, satisfying the following relationship:

[0280] P RACH =min{P CMAX ,P traget +PL+δ}. Where P RACH P represents the transmit power of RACH. CMAX P represents the maximum transmission power. traget= preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower indicates an initial random access preamble power configured by the network device 102, DELTA_PREAMBLE indicates a power offset value determined based on a preamble format, COUNTER indicates a retransmission number of the RACH, STEP indicates a power boosting value, PL indicates a path loss determined based on a downlink reference signal, and δ indicates the first value.

[0281] In some embodiments, the first information indicates that a beam of the RACH currently transmitted by the terminal 101 is changed (e.g., an SSB index is different from an SSB index of the RACH last transmitted by the terminal 101), and in an implementation, the first value indicated by the first information is not considered, that is, the transmission power of the RACH satisfies the following relationship: RACH = min{P CMAX ,P target + PL}. Optionally, the first value indicated by the first information is considered, that is, the transmission power of the RACH satisfies the following relationship: RACH = min{P CMAX ,P target + PL + δ}.

[0282] Optionally, the first information is used to indicate the first value of the RACH, and the first information is used to indicate that the RACH transmitted by the terminal 101 to the candidate cell belongs to a retransmitted RACH.

[0283] Optionally, the terminal 101 determines the transmission power of the RACH based on the second value and a retransmission number of the RACH. The retransmission number of the RACH can be implemented in the optional implementation of step S2102 of the optional implementation of Figure 2 and other related parts of the embodiments involved in Figure 2 and will not be repeated here.

[0284] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the second value, a retransmission number of the RACH, and a power boosting value.

[0285] In some embodiments, the second value is determined based on the first value received within a first time period.

[0286] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the second value, a retransmission number of the RACH, and a power boosting value, and satisfies the following relationship:

[0287] P RACH = min{P CMAX ,Ptraget + PL + Δ. Alternatively, P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower represents the initial random access preamble power configured by the network device 102, DELTA_PREAMBLE represents the power offset value determined based on the preamble format, COUNTER represents the retransmission number of the RACH, STEP represents the power boosting value, PL represents the path loss determined based on the downlink reference signal, and Δ represents the second value. Alternatively, the second value satisfies the following relationship: Alternatively, Δ represents the second value, i represents the current moment, k represents any moment before the current moment, and δ m represents the mth received first value.

[0288] In some embodiments, the first information indicates that the beam of the RACH transmitted by the terminal 101 changes, and the second value is determined as a preset value. Alternatively, the second value is 0. Alternatively, the first value indicated by the first information is not considered, that is, the transmission power of the RACH satisfies the following relationship: P RACH = min{P CMAX , P target + PL}. Alternatively, the first value indicated by the first information is considered, that is, the transmission power of the RACH satisfies the following relationship: P RACH = min{P CMAX , P target + PL + δ}.

[0289] Alternatively, the first information is used to indicate the first value of the RACH, and the first information is used to indicate that the RACH transmitted by the terminal 101 to the candidate cell does not belong to the retransmitted RACH.

[0290] Alternatively, the terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH. The optional implementation of the first value can be referred to the optional implementation of step S2101 in the embodiment of Figure 2 and other associated parts involved in the embodiment, which will not be repeated here. The optional implementation of the retransmission number of the RACH can be referred to the optional implementation of step S2102 in the embodiment of Figure 2 and other associated parts involved in the embodiment, which will not be repeated here. Figure 2 Figure 2

[0291] ​​Optionally, the first information is used to indicate the first value of the RACH, and the first information is used to indicate that the RACH sent by the terminal 101 to the candidate cell does not belong to the retransmission of the RACH.

[0292] Optionally, the terminal 101 determines the transmission power of the RACH based on the second value and the number of retransmissions of the RACH. The second value and the number of retransmissions of the RACH can be implemented as described in the optional implementation of step S2102 of the method 2000 and the embodiments related to the method 2000 described above, which will not be repeated here. Figure 2 Figure 2 Optionally, the terminal 101 determines the transmission power of the RACH based on the second value and the number of retransmissions of the RACH. The second value and the number of retransmissions of the RACH can be implemented as described in the optional implementation of step S2102 of the method 2000 and the embodiments related to the method 2000 described above, which will not be repeated here.

[0293] Optionally, when the terminal 101 determines the transmission power of the RACH using the second value, if the first information indicates that the beam or the SSB index of the terminal 101 sending the RACH changes, the terminal 101 determines that the second value is a preset value. Optionally, the preset value is the value initially indicated by the network device 102 to the terminal. Optionally, the preset value can be 0 or other preset values.

[0294] In some embodiments, the first information indicates the first value, and the terminal 101 determines the transmission power of the RACH based on the first value. Optionally, in the case where the first information indicates the first value, the terminal 101 determines the transmission power of the RACH based on the first value. Optionally, in response to the first information indicating the first value, the terminal 101 determines the transmission power of the RACH based on the first value. Optionally, when the first information indicates the first value, the terminal 101 determines the transmission power of the RACH based on the first value.

[0295] In some embodiments, the first information indicates the first value, and the terminal 101 determines the transmission power of the RACH based on the second value. Optionally, in the case where the first information indicates the first value, the terminal 101 determines the transmission power of the RACH based on the second value. Optionally, in response to the first information indicating the first value, the terminal 101 determines the transmission power of the RACH based on the second value. Optionally, when the first information indicates the first value, the terminal 101 determines the transmission power of the RACH based on the second value.

[0296] ​In some embodiments, the first information indicates that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, and the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH. Optionally, in the case that the first information indicates that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH. Optionally, in response to the first information indicating that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH. Optionally, when the first information indicates that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH.

[0297] In some embodiments, the first information indicates that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, and the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH. Optionally, in the case that the first information indicates that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH. Optionally, in response to the first information indicating that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH. Optionally, when the first information indicates that the RACH transmitted by the terminal 101 is not a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH.

[0298] In some embodiments, the first information indicates a first value, and the first information indicates that the RACH transmitted by the terminal 101 is a retransmission of a RACH, and the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH. Optionally, in the case that the first information indicates a first value, and the first information indicates that the RACH transmitted by the terminal 101 is a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH. Optionally, in response to the first information indicating a first value, and the first information indicating that the RACH transmitted by the terminal 101 is a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH. Optionally, when the first information indicates a first value, and the first information indicates that the RACH transmitted by the terminal 101 is a retransmission of a RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH.

[0299] In some embodiments, the first information indicates the first value, and the first information indicates that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, and the terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH. Optionally, in the case that the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH. Optionally, in response to the first information indicating the first value and the first information indicating that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH. Optionally, when the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH.

[0300] In some embodiments, the first information indicates the first value, and the first information indicates that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, and the terminal 101 determines the transmission power of the RACH based on the first value and the retransmission number of the RACH. Optionally, in the case that the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the second value and the retransmission number of the RACH. Optionally, in response to the first information indicating the first value and the first information indicating that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the second value and the retransmission number of the RACH. Optionally, when the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 belongs to the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the second value and the retransmission number of the RACH.

[0301] In some embodiments, the first information indicates the first value, and the first information indicates that the RACH transmitted by the terminal 101 is not the retransmitted RACH, and the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH. Optionally, in the case that the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 is not the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH. Optionally, in response to the first information indicating the first value and the first information indicating that the RACH transmitted by the terminal 101 is not the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH. Optionally, when the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 is not the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the first value and the number of retransmissions of the RACH.

[0302] In some embodiments, the first information indicates the first value, and the first information indicates that the RACH transmitted by the terminal 101 is not the retransmitted RACH, and the terminal 101 determines the transmission power of the RACH based on the second value and the number of retransmissions of the RACH. Optionally, in the case that the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 is not the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the second value and the number of retransmissions of the RACH. Optionally, in response to the first information indicating the first value and the first information indicating that the RACH transmitted by the terminal 101 is not the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the second value and the number of retransmissions of the RACH. Optionally, when the first information indicates the first value and the first information indicates that the RACH transmitted by the terminal 101 is not the retransmitted RACH, the terminal 101 determines the transmission power of the RACH based on the second value and the number of retransmissions of the RACH.

[0303] Step S2103, the terminal 101 transmits the RACH to the network device 102.

[0304] In some embodiments, the terminal 101 transmits the RACH to the network device 102 based on the transmission power of the RACH.

[0305] In some embodiments, the terminal 101 transmits the RACH to the candidate cell of the network device 102 based on the transmission power of the RACH.

[0306] In some embodiments, the RACH is used to determine the TA of the terminal to the candidate cell.

[0307] Step S2104, the network device 102 determines the TA.

[0308] In some embodiments, the network device 102 determines the TA based on the RACH sent by the terminal 101.

[0309] In some embodiments, the network device 102 determines the TA based on the preamble sent by the terminal 101.

[0310] In some embodiments, the network device 102 determines the TA based on the RACH sent by the terminal 101.

[0311] In some embodiments, the candidate cell of the network device 102 determines the TA.

[0312] In some embodiments, the candidate cell of the network device 102 determines the TA based on the RACH sent by the terminal 101.

[0313] In some embodiments, the candidate cell of the network device 102 determines the TA based on the preamble sent by the terminal 101.

[0314] In some embodiments, the network device 102 determines the TA of the terminal to the candidate cell.

[0315] In some embodiments, the network device 102 determines the TA of the candidate cell based on the RACH sent by the terminal 101.

[0316] In some embodiments, the network device 102 determines the TA of the candidate cell based on the preamble sent by the terminal 101.

[0317] The power control method according to the embodiments of the present disclosure can include at least one of steps S2101-S2104. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, step S2101+step S2103 can be implemented as an independent embodiment, step S2102+step S3103 can be implemented as an independent embodiment, step S2101+step S2102+step S2103 can be implemented as an independent embodiment, but not limited thereto.

[0318] In some embodiments, steps S2102, S2103, S2104 are optional, and one or more of these steps can be omitted or replaced in different embodiments.

[0319] In some embodiments, steps S2101, S2103, S2104 are optional, and one or more of these steps can be omitted or replaced in different embodiments.

[0320] Figure 3a is a flowchart of a power control method according to the embodiments of the present disclosure. As shown in FIG. 10, the power control method includes steps S2101-S2104. Figure 3aAs shown, this disclosure relates to a power control method, executed by terminal 101, the method including:

[0321] Step S3101: Obtain the first information.

[0322] For optional implementations of step S3101, please refer to [link / reference]. Figure 2 Optional implementation methods of step S2101, and Figure 2 Other related parts in the embodiments involved will not be described in detail here.

[0323] In some embodiments, terminal 101 receives first information from network device 102, but may also receive first information from other entities. The first information may indicate a first number of beam combinations.

[0324] In some embodiments, terminal 101 obtains first information as defined by the protocol.

[0325] In some embodiments, terminal 101 obtains first information from upper layer(s).

[0326] In some embodiments, the terminal 101 processes the information to obtain the first information.

[0327] In some embodiments, step S3101 is omitted, and the terminal 101 autonomously determines the first information, that is, determines the first number of beam combinations, or the above function is default or default.

[0328] Step S3102: Determine the RACH transmission power.

[0329] Optional implementations of step S3102 can be found in [reference]. Figure 2 Optional implementation methods of step S2102, and Figure 2 Other related parts in the embodiments involved will not be described in detail here.

[0330] In some embodiments, the transmission power of RACH is determined based on the first information received by terminal 101.

[0331] In some embodiments, the RACH transmit power is determined based on the DCI signaling received by terminal 101.

[0332] Step S3103: Send RACH.

[0333] For optional implementations of step S3103, please refer to [link / reference]. Figure 2 Optional implementation methods of step S2103, and Figure 2 Other related parts in the embodiments involved will not be described in detail here.

[0334] In some embodiments, the terminal 101 sends the RACH to the network device 102, but is not limited thereto, and can send the RACH to other subjects.

[0335] In some embodiments, the terminal 101 sends the RACH to a candidate cell of the network device 102.

[0336] Optionally, the RACH is used by the network device 102 to determine the TA. Optionally, the RACH is used by the network device 102 to determine the TA of the candidate cell. Its optional implementation can refer to the optional implementation of step S2104 of Figure 2 , and Figure 2 other associated parts of the embodiments involved, which are not described here again.

[0337] The power control method involved in the embodiments of the present disclosure can include at least one of steps S3101-S3103. For example, step S3102 can be implemented as an independent embodiment, step S3103 can be implemented as an independent embodiment, step S3101+step S3102 can be implemented as an independent embodiment, step S3101+step S3103 can be implemented as an independent embodiment, step S3101+step S3102+step S3103 can be implemented as an independent embodiment, but is not limited thereto.

[0338] In some embodiments, step S3101 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0339] Figure 3b is a flow diagram of the power control method according to the embodiments of the present disclosure. As Figure 3b shown, the embodiments of the present disclosure involve a power control method, which is performed by the terminal 101, and the method includes:

[0340] Step S3201, receiving first information sent by the network device 102.

[0341] The optional implementation of step S3201 can refer to the optional implementation of step S2101 of Figure 2 , and Figure 2 other associated parts of the embodiments involved. In optional embodiments, the optional implementation of step S3201 can refer to the optional implementation of step S3101 of Figure 3a , and Figure 3a other associated parts of the embodiments involved, which are not described here again.

[0342] In some embodiments, the first information is used to indicate a first value of the RACH, and the first value is used to indicate an amount of transmission power adjustment of the RACH.

[0343] In some embodiments, the first information includes a first field, and different values ​​of the first field correspond to different first values.

[0344] In some embodiments, the first information is used to indicate whether the RACH currently sent by the terminal 101 to the candidate cell is a retransmitted RACH.

[0345] In some embodiments, the first information is used to indicate the beam change or SSB index change of the RACH currently sent by the terminal 101 to the candidate cell.

[0346] In some embodiments, the first information is used to indicate a first value of the RACH, and the first information is used to indicate whether the RACH currently sent by the terminal 101 to the candidate cell belongs to the retransmitted RACH.

[0347] In an optional embodiment, an alternative implementation of step S3201 can be found in [reference needed]. Figure 2 Step S2101, and Figure 2 Other related parts in the embodiments involved. In optional embodiments, optional implementations of step S3201 can be found in [reference needed]. Figure 3a Step S3101, and Figure 3a Other related parts in the embodiments involved will not be described in detail here.

[0348] Step S3202: Determine the RACH transmission power based on the first information.

[0349] For optional implementations of step S3202, please refer to [link / reference]. Figure 2 Step S2102, and Figure 2 Other related parts in the embodiments involved. In optional embodiments, optional implementations of step S3202 can be found in [reference needed]. Figure 3a Step S3102, and Figure 3a Other related parts in the embodiments involved will not be described in detail here.

[0350] In some embodiments, terminal 101 determines the transmission power of RACH based on a first value.

[0351] In some embodiments, terminal 101 determines the transmission power of RACH based on a first value, satisfying the following relationship:

[0352] P RACH =min{P CMAX ,P traget +PL+δ}

[0353] Among them, P RACH P represents the transmit power of RACH. CMAX P represents the maximum transmission power. tragetPtarget represents a target reception power of the RACH, PL represents a path loss determined based on a downlink reference signal, and D represents the first value.

[0354] In some embodiments, the terminal 101 determines the transmission power based on a second value, which is determined based on the first value received within the first time period.

[0355] In some embodiments, the terminal 101 determines the transmission power based on a second value, which satisfies the following relationship:

[0356] P RACH = min{P CMAX , P target + PL + D}

[0357] where P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P target represents the target reception power of the RACH, PL represents the path loss determined based on the downlink reference signal, and D represents the second value.

[0358] In some embodiments, the terminal 101 determines, based on the first information, that the RACH currently transmitted by the terminal 101 to the candidate cell belongs to a retransmitted RACH, and the terminal 101 determines the number of retransmissions of the RACH currently transmitted by the terminal to the candidate cell.

[0359] In some embodiments, the value corresponding to the counter of the candidate cell is incremented by one, and the number of retransmissions of the RACH is determined based on the value corresponding to the counter of the candidate cell; wherein different candidate cells correspond to different counters.

[0360] In some embodiments, the terminal 101 determines, based on the first information, that the RACH currently transmitted by the terminal 101 to the candidate cell does not belong to a retransmitted RACH or a beam change of the RACH transmitted by the terminal 101 to the candidate cell or a SSB index change of the RACH transmitted by the terminal 101 to the candidate cell, and the counter of the candidate cell is reset to 1.

[0361] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH and a power boosting value.

[0362] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the number of retransmissions of the RACH and a power boosting value, which satisfies the following relationship:

[0363] P RACH = min{P CMAX , P traget + PL}. Where P RACH represents the transmission power of the RACH, P CMAXdenotes the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower denotes the initial random access preamble power configured by the network device 102, DELTA_PREAMBLE denotes a power offset value determined based on a preamble format, COUNTER denotes the retransmission number of the RACH, STEP denotes a power boosting value, and PL denotes a path loss determined based on a downlink reference signal.

[0364] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the first value, the retransmission number of the RACH, and the power boosting value.

[0365] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the first value, the retransmission number of the RACH, and the power boosting value, and the following relationship is satisfied:

[0366] P RACH = min{P CMAX , P traget + PL + δ}. Wherein P RACH denotes the transmission power of the RACH, P CMAX denotes the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower denotes the initial random access preamble power configured by the network device 102, DELTA_PREAMBLE denotes a power offset value determined based on a preamble format, COUNTER denotes the retransmission number of the RACH, STEP denotes the power boosting value, PL denotes a path loss determined based on a downlink reference signal, and δ denotes the first value.

[0367] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the second value, the retransmission number of the RACH, and the power boosting value, and the second value is determined based on the first value received within the first time period.

[0368] In some embodiments, the terminal 101 determines the transmission power of the RACH based on the second value, the retransmission number of the RACH, and the power boosting value, and the following relationship is satisfied:

[0369] P RACH = min{P CMAX , P traget+PL+Δ}. Where P RACH P represents the transmission power of the RACH. CMAX P represents the maximum transmission power. traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER-1) × STEP, where preambleReceivedTargetPower represents the initial random access preamble power configured for network device 102, DELTA_PREAMBLE represents the power offset value determined based on the preamble format, and DELTA... _ PREAMBL represents the number of retransmissions of the RACH, STEP represents the power boost value, PL represents the path loss determined based on the downlink reference signal, and Δ represents the second value.

[0370] In some embodiments, the second value satisfies the following relationship:

[0371] Where Δ represents the second value, i represents the current time, k represents any time before the current time, and δ m This represents the first value received in the m-th iteration.

[0372] In some embodiments, the terminal 101 determines the beam change or SSB index change of the RACH transmitted by the terminal 101 based on the first information, and determines the second value as a preset value.

[0373] In an optional embodiment, an alternative implementation of step S3202 can be found in [reference needed]. Figure 2 Step S2102, and Figure 2 Other related parts in the embodiments involved. In optional embodiments, optional implementations of step S3202 can be found in [reference needed]. Figure 3a Step S3102, and Figure 3a Other related parts in the embodiments involved will not be described in detail here.

[0374] Step S3203: Based on the transmission power of RACH, send RACH to the candidate cells of network device 102.

[0375] For optional implementations of step S3203, please refer to [link / reference]. Figure 2 Step S2103, and Figure 2 Other related parts in the embodiments involved. In optional embodiments, optional implementations of step S3203 can be found in [reference needed]. Figure 3a Step S3103, and Figure 3a Other related parts in the embodiments involved will not be described in detail here.

[0376] The power control method related to the embodiments of the present disclosure can include at least one of steps S3201-S3203. For example, step S3102 can be implemented as an independent embodiment, step S3203 can be implemented as an independent embodiment, steps S3201+S3202 can be implemented as an independent embodiment, steps S3201+S3203 can be implemented as an independent embodiment, steps S3201+S3202+S3203 can be implemented as an independent embodiment, but the present disclosure is not limited thereto.

[0377] In some embodiments, step S3201 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0378] In some embodiments, step S3203 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0379] In the embodiments of the present disclosure, step S3201 can be combined with step S3102 of Figure 3a , step S3202 can be combined with step S3203 of Figure 3a , and step S3201 can be combined with steps S3102 and S3103 of Figure 3a , but the present disclosure is not limited thereto.

[0380] Figure 4a is a flowchart of a power control method according to the embodiments of the present disclosure. As shown in Figure 4a , the embodiments of the present disclosure relate to a power control method, which is performed by a network device 102, and the method includes the following steps.

[0381] Step S4101: transmitting first information.

[0382] Optional implementation of step S4101 can refer to optional implementation of step S2101 of Figure 2 and other related parts in the embodiments related to Figure 2 , which will not be described here.

[0383] In some embodiments, the network device 102 transmits the first information to the terminal 101, but the present disclosure is not limited thereto, and the network device 102 can also transmit the first information to other subjects.

[0384] Optionally, the first information is used to trigger the terminal 101 to transmit a RACH to a candidate cell of the network device 102, and the first information is used for the terminal 101 to determine the transmission power of the RACH. Optional implementation thereof can refer to optional implementation of step S2102 of Figure 2 and other related parts in the embodiments related to Figure 2 , which will not be described here.

[0385] Step S4102: obtaining the RACH.

[0386] Optional implementation of step S4102 can refer to optional implementation of step S2103 in the foregoing method for obtaining the RACH, and other associated parts in the embodiments involved by the foregoing method for obtaining the RACH, which will not be repeated here. Figure 2 Optional implementation of step S4102 can refer to optional implementation of step S2103 in the foregoing method for obtaining the RACH, and other associated parts in the embodiments involved by the foregoing method for obtaining the RACH, which will not be repeated here. Figure 2 Optional implementation of step S4102 can refer to optional implementation of step S2103 in the foregoing method for obtaining the RACH, and other associated parts in the embodiments involved by the foregoing method for obtaining the RACH, which will not be repeated here.

[0387] In some embodiments, the network device 102 receives the RACH sent by the terminal 101, but is not limited thereto, and can also receive the RACH sent by other subjects.

[0388] In some embodiments, the network device 102 obtains the RACH specified by a protocol.

[0389] In some embodiments, the network device 102 obtains the RACH from upper layer(s).

[0390] In some embodiments, the network device 102 processes to obtain the RACH.

[0391] In some embodiments, step S4102 is omitted, and the network device 102 autonomously implements the function indicated by the RACH, or the above function is default or default.

[0392] Step S4103: determining the TA.

[0393] Optional implementation of step S4103 can refer to optional implementation of step S2104 in the foregoing method for determining the TA, and other associated parts in the embodiments involved by the foregoing method for determining the TA, which will not be repeated here. Figure 2 Optional implementation of step S4103 can refer to optional implementation of step S2104 in the foregoing method for determining the TA, and other associated parts in the embodiments involved by the foregoing method for determining the TA, which will not be repeated here. Figure 2 Optional implementation of step S4103 can refer to optional implementation of step S2104 in the foregoing method for determining the TA, and other associated parts in the embodiments involved by the foregoing method for determining the TA, which will not be repeated here.

[0394] The power control method involved by the embodiments of the present disclosure can include at least one of steps S4101-S4103. For example, step 4102 can be implemented as an independent embodiment, step 4102 can be implemented as an independent embodiment, step S4101+step S4102 can be implemented as an independent embodiment, step S4101+step S4102+step 4103 can be implemented as an independent embodiment, but is not limited thereto.

[0395] In some embodiments, step S4103 is optional, and one or more of these steps can be omitted or replaced in different embodiments.

[0396] Figure 4b is a flow chart of a power control method according to an exemplary embodiment. As shown in Figure 4b The embodiments of the present disclosure involve a power control method, which is performed by the network device 102, and the above method includes:

[0397] Step S4201, sending the first information.

[0398] In some embodiments, the first information is used to trigger the terminal 101 to send a random access channel (RACH) to the candidate cell.

[0399] In some embodiments, the first information is used for the terminal 101 to determine the transmission power of the RACH.

[0400] The optional implementation of step S4201 can refer to the step S2101 of the method 2000 and the other associated parts of the embodiments involved in the step S2101 of the method 2000. In the optional embodiments, the optional implementation of step S4201 can refer to the step S4101 of the method 4000 and the other associated parts of the embodiments involved in the step S4101 of the method 4000, which are not described herein. Figure 2 Figure 2 In the optional embodiments, the optional implementation of step S4201 can refer to the step S4101 of the method 4000 and the other associated parts of the embodiments involved in the step S4101 of the method 4000, which are not described herein. Figure 4a In some embodiments, the first information is used to indicate a first value of the RACH, and the first value is used to indicate the amount of adjustment of the transmission power of the RACH.

[0401] In some embodiments, the first information includes a first field, and different values of the first field correspond to different first values.

[0402] In some embodiments, the first information is used to indicate whether the RACH sent by the terminal 101 to the candidate cell belongs to a retransmitted RACH.

[0403] In some embodiments, the network device 102 does not receive the RACH sent by the terminal 101 last time for measuring the TA, and the first indication information is used to indicate that the RACH sent by the terminal 101 to the candidate cell currently belongs to a retransmission.

[0404] In some embodiments, the network device 102 successfully receives the RACH sent by the terminal 101 last time for measuring the TA, and the first indication information is used to indicate that the RACH sent by the terminal 101 to the candidate cell currently does not belong to a retransmission.

[0405] In some embodiments, the first information is used to indicate that the RACH sent by the terminal 101 to the candidate cell belongs to a retransmitted RACH, and the first information is used for the terminal 101 to determine the number of retransmissions of the RACH.

[0406] In some embodiments, the first information is used to indicate that the RACH sent by the terminal 101 to the candidate cell does not belong to a retransmitted RACH or that the beam of the RACH sent by the terminal 101 to the candidate cell changes or that the SSB index of the RACH sent by the terminal 101 to the candidate cell changes, and the first information is used for the terminal 101 to determine that the counter of the candidate cell is reset to 1.

[0407] In some embodiments, the first information is used to indicate that the RACH sent by the terminal 101 to the candidate cell does not belong to a retransmitted RACH or that the beam of the RACH sent by the terminal 101 to the candidate cell changes or that the SSB index of the RACH sent by the terminal 101 to the candidate cell changes, and the first information is used for the terminal 101 to determine that the counter of the candidate cell is reset to 1.

[0408] ​In some embodiments, the first information is used to indicate the first value of the RACH, and the first information is used to indicate whether the RACH transmitted by the terminal 101 to the candidate cell belongs to the retransmission of the RACH.

[0409] In the optional embodiments, the optional implementation of step S4201 can refer to the other associated parts of the embodiments related to steps S2101 of Figure 2 , and Figure 2 In the optional embodiments, the optional implementation of step S4201 can refer to the other associated parts of the embodiments related to steps S4101 of Figure 4a , and FIG. 4, which are not described herein.

[0410] In some embodiments, in some embodiments, the first information is used for the terminal 101 to determine the transmission power of the RACH based on the first value.

[0411] In some embodiments, the first information is used for the terminal 101 to determine the transmission power of the RACH based on the following manner:

[0412] P RACH = min{P CMAX , P traget + PL + δ}. Optionally, P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget represents the target reception power of the RACH, PL represents the path loss determined based on the downlink reference signal, and δ represents the first value.

[0413] In some embodiments, the first information is used for the terminal 101 to determine the transmission power of the RACH based on the second value, which is determined based on the first value received within the first time period.

[0414] In some embodiments, the first information is used for the terminal 101 to determine the transmission power of the RACH based on the following manner:

[0415] P RACH = min{P CMAX , P target + PL + Δ}. Optionally, P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P trage t represents the target reception power of the RACH, PL represents the path loss determined based on the downlink reference signal, and Δ represents the second value. In some embodiments, the first information is used to indicate the terminal 101 to determine the transmission power of the RACH based on the number of retransmissions of the RACH and the power boosting value.

[0416] In some embodiments, the first information is used to instruct the terminal 101 to determine the transmission power of the RACH based on the following manner:

[0417] P RACH = min{P CMAX , P traget + PL}. Wherein, P RACH denotes the transmission power of the RACH, P CMAX denotes the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower denotes the initial random access preamble power configured by the network device 102, DELTA_PREAMBLE denotes the power offset value determined based on the preamble format, COUNTER denotes the retransmission number of the RACH, and STEP denotes the power boosting value.

[0418] In some embodiments, the first information is used to instruct the terminal 101 to determine the transmission power of the RACH based on the first value, the retransmission number of the RACH, and the power boosting value.

[0419] In some embodiments, the first information is used to instruct the terminal 101 to determine the transmission power of the RACH based on the following manner:

[0420] P RACH = min{P CMAX , P traget + PL + δ}. Wherein, P RACH denotes the transmission power of the RACH, P CMAX denotes the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower denotes the initial random access preamble power configured by the network device 102, DELTA_PREAMBLE denotes the power offset value determined based on the preamble format, COUNTER denotes the retransmission number of the RACH, STEP denotes the power boosting value, PL denotes the path loss determined based on the downlink reference signal, and δ denotes the first value.

[0421] In some embodiments, the first information is used to instruct the terminal 101 to determine the transmission power of the RACH based on a second value, a retransmission number of the RACH, and a power boosting value, wherein the second value is determined based on the first value received in the first time period.

[0422] In some embodiments, the first information is used to instruct the terminal 101 to determine the transmission power of the RACH based on the following manner:

[0423] P RACH = min{P CMAX , P traget + PL + Δ}. Wherein P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower represents the initial random access preamble power configured by the network device 102, DELTA_PREAMBLE represents the power offset value determined based on the preamble format, DELTA _ PREAMBLE represents the retransmission number of the RACH, STEP represents the power boosting value, PL represents the path loss determined based on the downlink reference signal, and Δ represents the second value.

[0424] In some embodiments, the second value satisfies the following relationship:

[0425]

[0426] Wherein Δ represents the second value, i represents the current time, k represents any time before the current time, and δ m represents the mth received first value.

[0427] In some embodiments, the first information instructs the terminal 101 to change the beam or the SSB index when transmitting the RACH, and the first information is used to instruct the terminal 101 to determine the second value as a preset value.

[0428] In optional embodiments, the optional implementation of step S4201 can refer to the embodiments involved in steps S2102 and Figure 2 of the method 2000. Figure 2

[0429] Step S4202: The candidate cell of the network device 102 receives the RACH transmitted by the terminal 101 based on the transmission power of the RACH.

[0430] The optional implementation of step S4202 can refer to the embodiments involved in steps S2102 and​Figure 2 Step S2103, and Figure 2 Other related parts in the embodiments involved. In optional embodiments, optional implementations of step S4202 can be found in [reference needed]. Figure 4a Step S4102 and other related parts in the embodiment involved in Figure 4 will not be described again here.

[0431] In some embodiments, RACH is used to determine the TA of a candidate cell. Optional implementations can be found in [link to relevant documentation]. Figure 2 Optional implementation methods of step S2104, and Figure 2 Other related parts in the embodiments involved will not be described in detail here.

[0432] The power control method disclosed in this embodiment may include at least one of steps S4201 to S4202. For example, step S4201 may be implemented as a standalone embodiment, step S4202 may be implemented as a standalone embodiment, and step S4101 + step S4102 may be implemented as a standalone embodiment, but is not limited thereto.

[0433] Figure 5 This is a schematic flowchart illustrating a power control method according to an embodiment of this disclosure. Figure 5 As shown, this disclosure relates to a power control method for a communication system 100, the method comprising:

[0434] In step S5101, network device 102 sends first information to terminal 101.

[0435] For optional implementations of step S5101, please refer to [link / reference]. Figure 2 Optional implementation methods of step S2101, and Figure 2 Other related parts in the embodiments involved. Optional implementations of step S5101 can be found in [reference needed]. Figure 4a Optional implementation methods of step S4101, and Figure 4a Other related parts in the embodiments involved. Optional implementations of step S5101 can be found in [reference needed]. Figure 4b Optional implementation methods of step S4201, and Figure 4b Other related parts in the embodiments involved.

[0436] In some embodiments, the first information is used by terminal 101 to determine the transmission power of access channel RACH;

[0437] In step S5102, terminal 101 determines the transmission power of RACH based on the first information.

[0438] For optional implementations of step S5102, please refer to [link / reference]. Figure 2 Optional implementation methods of step S2102, andFigure 2 Other associated parts in the embodiments involved. The optional implementation of step S5103 can refer to the optional implementation of step S3102 in the embodiment of Figure 3a , and the optional implementation of step S3202 in the embodiment of Figure 3a Other associated parts in the embodiments involved. The optional implementation of step S5103 can refer to the optional implementation of step S3102 in the embodiment of Figure 3b , and the optional implementation of step S3202 in the embodiment of Figure 3b Other associated parts in the embodiments involved.

[0439] In step S5103, the terminal 101 sends RACH to the candidate cell of the network device 102 based on the sending power of RACH.

[0440] The optional implementation of step S5103 can refer to the optional implementation of step S2103 in the embodiment of Figure 2 , and the optional implementation of step S3103 in the embodiment of Figure 2 Other associated parts in the embodiments involved. The optional implementation of step S5103 can refer to the optional implementation of step S3102 in the embodiment of Figure 3a , and the optional implementation of step S3203 in the embodiment of Figure 3a Other associated parts in the embodiments involved. The optional implementation of step S5103 can refer to the optional implementation of step S3102 in the embodiment of Figure 3b , and the optional implementation of step S3203 in the embodiment of Figure 3b Other associated parts in the embodiments involved.

[0441] In some embodiments, RACH is used to determine the TA of the candidate cell.

[0442] In some embodiments, the above method can include the method described in the above embodiments related to the communication system 100, the terminal 101, the network device 102, etc., which will not be described here.

[0443] The embodiments of the present disclosure also provide a power control method, as follows:

[0444] Scheme one: power control of random access channel (RACH) triggered by source cell for candidate cell timing advance (TA) measurement.

[0445] P RACH = min{P CMAX , P traget + PL + δ}

[0446] In some embodiments, for physical downlink shared channel command triggered random access channel (PDCCH order RACH) for timing advance (TA) measurement, an adjustment amount δ as shown in the above formula is added when calculating the power.

[0447] In some embodiments, the network device indicates the value to adjust the transmission power of the random access channel (RACH) for the timing advance (TA) measurement of the same candidate cell each time the random access channel (RACH) is triggered by a physical downlink shared channel order (PDCCH order) (downlink control information, DCI). (The value is 0 for the first transmission)

[0448] In some embodiments, the indication is indicated by the downlink control information (DCI) triggering the random access channel (RACH), and the correspondence between the indication field and the actual adjustment value is as shown in Table 2:

[0449] Table 2

[0450] Indicating domain Adjustment value 0 -2 1 -1 2 +1 3 +2

[0451] In some embodiments, the adjustment method includes Option 1 and Option 2:

[0452] Option 1: Adjust for the first uplink transmission each time.

[0453] Option 2: Adjust for the previous transmission each time, in which case the adjustment amount is a cumulative value Δ. That is Where δ m represents δ indicated by the downlink control information (DCI) at time (i-k+m). If the beam of the random access channel (RACH) changes, i.e. the synchronization signal block index (SSB index) in the physical downlink shared channel order (PDCCH order) changes, then Δ(i) = Δ(0) or Δ(i) = 0.

[0454] Scheme 2: The candidate cell does not correctly receive the preamble sequence, and performs random access channel (RACH) retransmission and power boosting.

[0455] In some embodiments, the source cell re-triggers the random access channel (RACH) for timing advance (TA) measurement by a physical downlink shared channel order (PDCCH order), and performs power boosting.

[0456] In some embodiments, the power is gradually boosted by borrowing the power boosting method. target .

[0457] In some embodiments, when the random access channel (RACH) is triggered by the downlink control information (DCI), the indication in the indication field indicates whether the last preamble reception is successful, if not, the current transmission of the random access channel (RACH) can be considered as a retransmission. The user records the number of retransmissions by a counter (COUNTER). And the transmission power is increased in the manner of the above formula. If the beam is changed or the network device indicates that the last preamble reception is successful before reaching the maximum number of transmissions, the power boosting is no longer performed.

[0458] In some embodiments, for example Figure 6 As shown, if the preamble is not correctly received at time t1, the network device re-triggers the random access channel (RACH) at time t2 to perform timing advance (TA) measurement. At this time, the terminal 101 will perform power boosting according to the indication of the network device, which determines that the current transmission can be considered as a retransmission. If the preamble is successfully received at time t2, the next time the random access channel (RACH) is triggered to measure the timing advance (TA), for example at time t3, the network device indicates that the triggered random access channel (RACH) is not a retransmission of the random access channel (RACH) at time t2.

[0459] The embodiments of the present disclosure also provide a power control method, which is described as follows:

[0460] A power control method for a random access process of candidate cell timing advance (TA) measurement. The terminal 101 receives the indication information of the network device, which is used to trigger the terminal 101 to initiate a random access to the candidate cell to measure the timing advance (TA)

[0461] In some embodiments, the indication information includes first indication information, which indicates the power adjustment value δ to the user.

[0462] Specifically, the value of the indication field and the adjustment value δ correspond in the manner of Table 3 as follows.

[0463] Table 3

[0464] Indicating domain Adjustment value 0 -2 1 -1 2 +1 3 +2

[0465] In some embodiments, the terminal 101 determines the transmission power of the preamble in the following formula:

[0466] P RACH = min{P CMAX ,P target + PL + Δ}

[0467] Option 1: Δ = δ, that is, adjustment is performed for the first uplink transmission each time.

[0468] Option2: where i is the current time, and the summation is over all δ received between time (i-k+1) and i. That is, each adjustment is made with respect to the previous transmission. In this case, the adjustment amount Δ is a cumulative value. If the beam of the random access channel (RACH) initiated to a certain candidate cell is changed, i.e., the synchronization signal block index (SSB index) in the physical downlink shared channel order (PDCCH order) is changed, then Δ is set to zero, i.e., Δ = 0 at this moment.

[0469] In some embodiments, the indication information includes second indication information.

[0470] In some embodiments, the second indication information is used to indicate to the terminal 101 whether the current triggered random access channel (RACH) is a retransmission.

[0471] In some embodiments, a counter is newly introduced for the terminal 101, which is used to record the number of retransmissions of the triggered random access channel (RACH), and the initial value is 1. In response to the indication that the current triggered random access channel (RACH) of the terminal 101 is a retransmission, the counter is incremented by 1.

[0472] In some embodiments, when the retransmission of the random access channel (RACH) is initiated, the terminal 101 determines the current transmit power of the terminal 101 in the following manner:

[0473] P RACH = min{P CMAX , P traget + PL}. Wherein P traget = preambleReceivedTargetPower + DELTA PREAMBLE + (COUNTER - 1) × STEP. COUNTER is the counter, and STEP is the power value raised each time, which can reuse the existing value or be reconfigured.

[0474] In some embodiments, when the retransmission of the random access channel (RACH) is initiated, the current transmit power of the terminal 101 is determined in the following manner:

[0475] P RACH = min{P CMAX , P traget + PL + Δ}.

[0476] Wherein Δ = δ or

[0477] Optionally, P traget= preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) * STEP.

[0478] In some embodiments, in response to the second indication information indicating that a random access channel (RACH) currently triggered by the terminal 101 is not a one-time retransmission, or the indication information indicating that a beam change, i.e., a synchronization signal block index (SSB index) change, of the terminal 101 is initiated, the counter is reset to 1.

[0479] In some embodiments, the transmission power corresponds to the transmission power in the foregoing embodiments.

[0480] In the embodiments of the present disclosure, each step can be implemented as an independent embodiment. Part or all of the steps, and optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with optional implementation manners of other embodiments.

[0481] The embodiments of the present disclosure also provide a device for implementing any of the above methods, for example, a device is provided, which includes units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another device is provided, which includes units or modules for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0482] It should be understood that the division of each unit or module in the above apparatus is only a logical function division, and all or part of them can be integrated into a physical entity or physically separated in actual implementation. In addition, the units or modules in the apparatus can be implemented in the form of processor calling software: for example, the apparatus includes a processor, the processor is connected with a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to realize the functions of any of the above methods or the units or modules of the above apparatus, wherein the processor is a general processor such as a central processing unit (CPU) or a microprocessor, and the memory is a memory in the apparatus or a memory outside the apparatus. Alternatively, the units or modules in the apparatus can be implemented in the form of hardware circuit, and the functions of part or all of the units or modules can be realized by the design of the hardware circuit. The above hardware circuit can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of part or all of the units or modules are realized by the design of the logical relationship between the elements in the circuit; for another example, in another implementation, the above hardware circuit is a programmable logic device (PLD), and a field programmable gate array (FPGA) is taken as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of part or all of the units or modules. All units or modules of the above apparatus can be all implemented in the form of processor calling software, or all implemented in the form of hardware circuit, or part implemented in the form of processor calling software and the remaining part implemented in the form of hardware circuit.

[0483] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), or a Deep Learning Processing Unit (DPU).

[0484] Figure 7a This is a schematic diagram of the structure of the first power control device provided in an embodiment of this disclosure. Figure 7a As shown, the first power control device 7100 includes: a receiving module 7101, configured to receive first information sent by a network device, the first information being used to trigger a terminal to send a Random Access Channel (RACH) to a candidate cell of the network device, and the first information being used by the terminal to determine the transmission power of the RACH; a processing module 7102, configured to determine the transmission power of the RACH based on the first information; and a transmitting module 7103, configured to transmit the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used to determine the TA of the candidate cell. Optionally, the receiving module is configured to perform the receiving-related steps performed by the terminal 101 in any of the above methods, the processing module is configured to perform the processing-related steps performed by the terminal 101 in any of the above methods, and the transmitting module is configured to perform the transmitting-related steps performed by the terminal 101 in any of the above methods; further details are omitted here.

[0485] Figure 7bThis is a schematic diagram of the structure of the second power control device provided in an embodiment of this disclosure. Figure 7b As shown, the second power control device 7200 includes: a transmitting module 7201, used to transmit first information, which triggers the terminal to transmit a random access channel (RACH) to a candidate cell of the network device, and the first information is used by the terminal 101 to determine the transmission power of the RACH; and a receiving module 7202, used by the candidate cell of the network device to receive the RACH transmitted by the terminal 101 based on the transmission power of the RACH, the RACH being used to determine the TA of the candidate cell. Optionally, the transmitting module is used to perform the transmission-related steps performed by the network device 102 in any of the above methods, and the receiving module is used to perform the reception-related steps performed by the network device 102 in any of the above methods, which will not be described in detail here. Optionally, the second power control device 7200 also includes a processing module, which is used to perform the processing-related steps performed by the network device 102 in any of the above methods, which will not be described in detail here.

[0486] Figure 8a This is a schematic diagram of the structure of the communication device 8100 provided in this embodiment. The communication device 8100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 8100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0487] like Figure 8a As shown, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. The processor 8101 is used to invoke instructions to cause the communication device 8100 to execute any of the above methods.

[0488] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may also be located outside the communication device 8100.

[0489] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps in the above methods, such as sending and receiving, are performed by the transceiver 8103, and other steps are performed by the processor 8101.

[0490] In some embodiments, the transceiver can include a receiver and a transmitter, which can be separate or integrated together. Optionally, the terms transceiver, transceiving unit, transceiver, transceiving circuit, etc. can be replaced by each other, the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc. can be replaced by each other, and the terms receiver, receiving unit, receiver, receiving circuit, etc. can be replaced by each other.

[0491] Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102, and can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuit 8104 can read the instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0492] The communication device 8100 described in the above embodiments can be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited to this, and the structure of the communication device 8100 can not be limited by Figure 8a The communication device can be a standalone device or can be part of a larger device. For example, the communication device can be: (1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem; (2) a set of one or more ICs, which can optionally also include storage components for storing data, programs; (3) an ASIC, such as a Modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, intelligent terminal device, cellular phone, wireless device, handset, mobile unit, vehicle-mounted device, network device, cloud device, artificial intelligence device, etc.; (6) other, etc.

[0493] Figure 8b is a structural schematic diagram of a chip 8200 provided by an embodiment of the present disclosure. For the case where the communication device 8100 is a chip or a chip system, reference can be made to the structural schematic diagram of the chip 8200 shown in Figure 8b , but not limited thereto.

[0494] The chip 8200 includes one or more processors 8201, which are used to invoke instructions to enable the chip 8200 to perform any of the above methods.

[0495] In some embodiments, chip 8200 further includes one or more interface circuits 8202 connected to memory 8203, which can be used to receive signals from or send signals to memory 8203 or other devices. For example, interface circuit 8202 can read instructions stored in memory 8203 and send the instructions to processor 8201. Alternatively, the terms interface circuit, interface, transceiver pin, transceiver, etc. can be replaced by each other.

[0496] In some embodiments, chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of memory 8203 can be outside chip 8200.

[0497] The present disclosure also provides a storage medium having instructions stored thereon, which, when executed on communication device 8100, cause communication device 8100 to perform any of the above methods. Alternatively, the storage medium is an electronic storage medium. Alternatively, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Alternatively, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a transitory storage medium.

[0498] The present disclosure also provides a program product, which, when executed by communication device 8100, causes communication device 8100 to perform any of the above methods. Alternatively, the program product is a computer program product.

[0499] The present disclosure also provides a computer program, which, when executed on a computer, causes the computer to perform any of the above methods.

Claims

1. A power control method, characterized by, The method is performed by a terminal, and the method comprises: receiving first information sent by a network device, the first information being used for triggering the terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information being used for the terminal to determine a transmission power of the RACH, the first information being used for indicating a first value of the RACH, the first value being used for indicating an amount of transmission power adjustment of the RACH; determining the transmission power of the RACH based on the first information; sending the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH being used for determining a timing advance (TA) of the terminal to the candidate cell; wherein the determining the transmission power of the RACH based on the first information comprises: determining the transmission power of the RACH based on the first value.

2. The method of claim 1, wherein, The first information comprises a first field, and different values of the first field correspond to different first values.

3. The method of claim 1, wherein, The determining the transmission power of the RACH based on the first value satisfies the following relationship: P RACH = min{P CMAX ,P traget + PL + δ} wherein P RACH represents a transmission power of the RACH, P CMAX represents a maximum transmission power, P traget represents a target reception power of the RACH, PL represents a path loss determined based on a downlink reference signal, and δ represents the first value.

4. The method according to claim 1 or 2, characterized in that, The determining the transmission power of the RACH based on the first information comprises: determining the transmission power based on a second value, the second value being determined based on the first value received within a first time period.

5. The method of claim 4, wherein, The determining the transmission power based on the second value satisfies the following relationship: P RACH = min{P CMAX , P target + PL + Δ} wherein P RACH represents a transmission power of the RACH, P CMAX represents a maximum transmission power, P target represents a target reception power of the RACH, PL represents a path loss determined based on a downlink reference signal, and Δ represents the second value.

6. The method of claim 1, wherein, The first information is used for indicating whether the RACH currently sent by the terminal to the candidate cell belongs to a retransmitted RACH.

7. The method of claim 6, wherein, The first information indicates that the RACH currently sent by the terminal to the candidate cell belongs to a retransmitted RACH, and the number of retransmissions of the RACH is determined.

8. The method of claim 7, wherein, The determining the number of retransmissions of the RACH comprises: adding one to a value corresponding to a counter of the candidate cell, and determining the number of retransmissions of the RACH currently sent by the terminal to the candidate cell based on the value corresponding to the counter of the candidate cell; wherein different candidate cells correspond to different counters.

9. The method of claim 6, wherein, The first information indicates that the RACH currently sent by the terminal to the candidate cell does not belong to a retransmitted RACH, or a beam of the RACH sent by the terminal to the candidate cell is changed, or a SSB index of the RACH sent by the terminal to the candidate cell is changed, and a counter of the candidate cell is reset to 1.

10. The method according to any one of claims 7 to 9, characterized in that, The determining the transmission power of the RACH based on the first information comprises: determining the transmission power of the RACH based on the number of retransmissions of the RACH and a power boosting value.

11. The method of claim 10, wherein, The determining the transmission power of the RACH based on the number of retransmissions of the RACH and the power boosting value satisfies the following relationship: P RACH = min{P CMAX ,P traget + PL} wherein P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower represents an initial random access preamble power configured by the network device, DELTA_PREAMBLE represents a power offset value determined based on a preamble format, COUNTER represents the number of retransmissions of the RACH, STEP represents the power boosting value, and PL represents a path loss determined based on a downlink reference signal.

12. The method of claim 1, wherein, The first information is used for indicating the first value of the RACH, and the first information is used for indicating whether the RACH currently sent by the terminal to the candidate cell belongs to a retransmitted RACH.

13. The method of claim 12, wherein, The determining the transmission power of the RACH based on the first information comprises: determining the transmission power of the RACH based on the first value, the number of retransmissions of the RACH, and a power boosting value.

14. The method of claim 13, wherein, The determining the transmission power of the RACH based on the first value, the number of retransmissions of the RACH, and the power boosting value satisfies the following relationship: P RACH = min{P CMAX ,P traget + PL + δ} wherein P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA_PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower represents the initial random access preamble power configured by the network device, DELTA_PREAMBLE represents a power offset value determined based on a preamble format, COUNTER represents the retransmission number of the RACH, and STEP represents the power boosting value, PL represents the path loss determined based on a downlink reference signal, and δ represents the first value.

15. The method of claim 12, wherein, The determining the transmission power of the RACH based on the first information comprises: determining the transmission power of the RACH based on a second value, a retransmission number of the RACH and a power boosting value, the second value being determined based on the first value received within a first time period.

16. The method of claim 15, wherein, The determining the transmission power of the RACH based on the second value, the retransmission number of the RACH and the power boosting value satisfies the following relationship: P RACH = min{P CMAX , P traget + PL + Δ} wherein P RACH represents the transmission power of the RACH, P CMAX represents the maximum transmission power, P traget = preambleReceivedTargetPower + DELTA PREAMBLE + (COUNTER - 1) x STEP, preambleReceivedTargetPower represents the initial random access preamble power configured by the network device, DELTA PREAMBLE represents a power offset value determined based on a preamble format, COUNTER represents the retransmission number of the RACH, and STEP represents the power boosting value, PL represents the path loss determined based on a downlink reference signal, and Δ represents the second value.

17. The method of claim 5 or 16, wherein, The second value satisfies the following relationship: wherein Δ denotes the second value, i denotes the current time, k denotes any time before the current time, δ m denotes the mth received first value.

18. The method of claim 3 or 14, wherein, The first information indicates that the terminal changes a beam or an SSB index for transmitting the RACH, and the first value is determined as a preset value.

19. The method of claim 5 or 16, wherein, The first information indicates that the terminal changes a beam or an SSB index for transmitting the RACH, and the second value is determined as a preset value.

20. A power control method, comprising: The method is performed by a network device, and the method comprises: sending first information, the first information being used for triggering a terminal to send a random access channel (RACH) to a candidate cell of a network device, and the first information being used for the terminal to determine a transmission power of the RACH, the first information being used for indicating a first value of the RACH, the first value being used for indicating an amount of transmission power adjustment of the RACH, and the first value being used for the terminal to determine the transmission power of the RACH; the candidate cell of the network device receives the RACH sent by the terminal based on the transmission power of the RACH, and the RACH is used for determining a timing advance (TA) of the terminal to the candidate cell.

21. The method of claim 20, wherein, The first information comprises a first field, and different values of the first field correspond to different first values.

22. The method of claim 20, wherein, The first information is used for indicating whether the RACH currently sent by the terminal to the candidate cell belongs to retransmitted RACH.

23. The method of claim 22, wherein, The first information is used for indicating that the RACH currently sent by the terminal to the candidate cell belongs to one-time retransmission, without receiving the RACH used for measuring the TA sent by the terminal last time.

24. The method of claim 22, wherein, The first information is used for indicating that the RACH currently sent by the terminal to the candidate cell does not belong to one-time retransmission, with successfully receiving the RACH used for measuring the TA sent by the terminal last time.

25. The method of claim 23, wherein, The first information is used for indicating that the RACH currently sent by the terminal to the candidate cell belongs to retransmitted RACH, and the first information is used for the terminal to determine a retransmission number of the RACH.

26. The method of claim 24, wherein, The first information is used for indicating that the RACH currently sent by the terminal to the candidate cell does not belong to retransmitted RACH, or a beam change of the RACH sent by the terminal to the candidate cell or an SSB index change of the RACH sent by the terminal to the candidate cell, and the first information is used for the terminal to reset a counter of the candidate cell to 1.

27. The method of claim 20, wherein, The first information is used for indicating the first value of the RACH, and the first information is used for indicating whether the RACH currently sent by the terminal to the candidate cell belongs to retransmitted RACH.

28. A power control method, comprising: The method is used for a communication system, and the method comprises: The network device sends first information, the first information is used for triggering the terminal to send a random access channel to a candidate cell of the network device, and the first information is used for the terminal to determine a transmission power of the random access channel (RACH), the first information is used for indicating a first value of the RACH, the first value is used for indicating a transmission power adjustment amount of the RACH; The terminal receives the first information sent by the network device; The terminal determines the transmission power of the RACH based on the first information; The terminal sends the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH is used to determine a timing advance (TA) of the terminal to the candidate cell; The candidate cell of the network device receives the RACH sent by the terminal based on the transmission power of the RACH; The terminal determines the transmission power of the RACH based on the first information, including: Determining the transmission power of the RACH based on the first value.

29. A first power control device, comprising: The apparatus includes: A receiving module is configured to receive first information sent by a network device, the first information is used for triggering a terminal to send a random access channel (RACH) to a candidate cell of the network device, and the first information is used for the terminal to determine a transmission power of the RACH, the first information is used for indicating a first value of the RACH, the first value is used for indicating a transmission power adjustment amount of the RACH; A processing module is configured to determine the transmission power of the RACH based on the first information; A sending module is configured to send the RACH to the candidate cell of the network device based on the transmission power of the RACH, the RACH is used to determine a timing advance (TA) of the terminal to the candidate cell; The processing module determines the transmission power of the RACH based on the first information in the following manner: Determining the transmission power of the RACH based on the first value.

30. A second power control device, comprising: The apparatus includes: A sending module is configured to send first information, the first information is used for triggering a terminal to send a random access channel (RACH) to a candidate cell of a network device, and the first information is used for the terminal to determine a transmission power of the RACH, the first information is used for indicating a first value of the RACH, the first value is used for indicating a transmission power adjustment amount of the RACH, and the first value is used for the terminal to determine the transmission power of the RACH; A receiving module is configured to receive the RACH sent by the terminal based on the transmission power of the RACH by the candidate cell of the network device, the RACH is used to determine a timing advance (TA) of the terminal to the candidate cell.

31. A communications device, characterized by One or more processors; The processor is configured to call instructions to enable the communication device to perform the power control method of any one of claims 1-19, 20-27. The terminal and the network device are included, wherein the terminal is configured to implement the power control method of any one of claims 1-19, and the network device is configured to implement the power control method of any one of claims 20-27.

32. A communication system, characterized by ​ 33. A storage medium, the storage medium storing instructions, wherein, When the instructions are executed on the communication device, cause the communication device to perform the power control method as claimed in any one of claims 1-19, 20-27.

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