Power control method, terminal, and network device

Abstract

The present application provides a power control method, a terminal, and a network device. The method is executed by a terminal and comprises: determining to perform PRACH transmission including N preamble retransmissions, N being an integer greater than 1; and on the basis of the conditions of the N preamble retransmissions, determining whether to increase the power for PRACH retransmission. Thus, on the basis of the conditions of multiple preamble retransmissions, the terminal can determine whether or not to increase the power for PRACH retransmission, enabling reasonable power allocation and reducing the power consumption of the terminal.

Description

Power control method, terminal, and network device Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a power control method, a terminal, and a network device. Background Art

[0002] In related art, a power boosting mechanism for physical random access channel (PRACH) retransmission is proposed. When each additional PRACH retransmission is performed, the transmission power is increased by one level.

[0003] Summary of the Invention

[0004] The power control method, terminal, and network device provided by the embodiments of the present disclosure are used to solve the problem of how to control the power increase of PRACH retransmission when the terminal performs PRACH transmission with multiple preamble code retransmissions.

[0005] The embodiments of the present disclosure provide a power control method, a terminal, and a network device.

[0006] According to the first aspect of an embodiment of the present disclosure, a power control method is proposed, which is executed by a terminal, including: determining to perform a PRACH transmission with N repeated transmissions of a preamble code, where N is an integer greater than 1; and determining whether to increase the power of the PRACH retransmission based on the N repeated transmissions of the preamble code.

[0007] In the above embodiment, the terminal can determine whether to increase the power of PRACH retransmission according to the situation of multiple preamble code retransmissions, so as to reasonably allocate power and save power consumption of the terminal.

[0008] According to a second aspect of an embodiment of the present disclosure, a power control method is provided, which is executed by a network device, including: sending first information to a terminal; wherein the first information includes at least one of the following:

[0009] First indication information, where the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled;

[0010] Second indication information, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled;

[0011] Configuration information, wherein the configuration information is used to indicate a first value, and the first value is used for the terminal to increase the power of PRACH retransmission when P transmissions out of N preamble code retransmissions are canceled based on a first condition, wherein P is less than or equal to the first value, and the first value is an integer less than N; or the first value is used for the terminal to maintain the power of PRACH retransmission unchanged when Q transmissions out of N preamble code retransmissions are canceled based on the first condition, wherein Q is greater than the first value, and the first value is an integer less than N.

[0012] In the above embodiment, the network device can instruct the terminal to increase the power of PRACH retransmission according to the N-times preamble code retransmission, thereby reasonably allocating power and saving power consumption of the terminal.

[0013] According to a third aspect of an embodiment of the present disclosure, a terminal is provided, including: a processing module for determining to perform a PRACH transmission with N repeated transmissions of a preamble code, where N is an integer greater than 1; the processing module is also used to determine whether to increase the power of the PRACH retransmission based on the situation of the N repeated transmissions of the preamble code.

[0014] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, including: a transceiver module, configured to send first information to a terminal; wherein the first information includes at least one of the following:

[0015] First indication information, where the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled;

[0016] Second indication information, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled;

[0017] Configuration information, wherein the configuration information is used to indicate a first value, and the first value is used for the terminal to determine to increase the power of PRACH retransmission when less than or equal to the first value of transmissions are canceled based on the first condition in N times of preamble code retransmission; or the first value is used for the terminal to keep the power of PRACH retransmission unchanged when more than the first value of transmissions are canceled based on the first condition in N times of preamble code retransmission.

[0018] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, comprising: one or more processors; a memory coupled to the processor, wherein the memory stores instructions, and when the instructions are executed by the processor, the terminal executes the method described in the first aspect.

[0019] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided, comprising: one or more processors; a memory coupled to the processor, wherein the memory stores instructions, and when the instructions are executed by the processor, the network device is used to execute the method described in the second aspect.

[0020] According to a seventh aspect of an embodiment of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal is configured to implement the method described in the first aspect, and the network device is configured to implement the method described in the second aspect.

[0021] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method described in the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is an architecture diagram of a communication system provided by an embodiment of the present disclosure;

[0023] FIG2A is a flow chart of a power control method provided by an embodiment of the present disclosure;

[0024] FIG2B is a flow chart of another power control method provided by an embodiment of the present disclosure;

[0025] FIG2C is a flow chart of another power control method provided by an embodiment of the present disclosure;

[0026] FIG2D is a flow chart of another power control method provided by an embodiment of the present disclosure;

[0027] FIG3A is a flow chart of another power control method provided by an embodiment of the present disclosure;

[0028] FIG3B is a flow chart of another power control method provided by an embodiment of the present disclosure;

[0029] FIG3C is a flow chart of another power control method provided by an embodiment of the present disclosure;

[0030] FIG4 is a flow chart of another power control method provided by an embodiment of the present disclosure;

[0031] FIG5A is a structural diagram of a terminal provided by an embodiment of the present disclosure;

[0032] FIG5B is a structural diagram of a network device provided by an embodiment of the present disclosure;

[0033] FIG6A is a structural diagram of a communication device provided by an embodiment of the present disclosure;

[0034] FIG6B is a schematic structural diagram of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0035] The embodiments of the present disclosure provide a power control method, a terminal, and a network device.

[0036] In a first aspect, an embodiment of the present disclosure proposes a power control method, which is executed by a terminal, including: determining to perform a PRACH transmission with N repeated transmissions of a preamble code, where N is an integer greater than 1; and determining whether to increase the power of the PRACH retransmission based on the N repeated transmissions of the preamble code.

[0037] In the above embodiment, the terminal can determine whether to increase the power of PRACH retransmission according to the situation of multiple preamble code retransmissions, so as to reasonably allocate power and save power consumption of the terminal.

[0038] In combination with some embodiments of the first aspect, in some embodiments, the terminal determines whether to increase the power based on the situation of N repeated transmissions of the preamble code, including: according to the protocol agreement, determining that at least one transmission in the N repeated transmissions of the preamble code is not canceled, and determining to increase the power of the PRACH retransmission; or according to the protocol agreement, determining that all N repeated transmissions of the preamble code are canceled, and determining that the power of the PRACH retransmission remains unchanged.

[0039] In the above embodiment, the terminal can determine, according to the protocol agreement, to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled, and to keep the power of PRACH retransmission unchanged when all N preamble code retransmissions are canceled, thereby reasonably allocating power and saving power consumption of the terminal.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the terminal determines whether to increase the power based on the situation of N preamble code retransmissions, including: receiving first indication information sent by a network device, wherein the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in the N preamble code retransmissions is not canceled; based on the first indication information and the situation that the N preamble code retransmissions are canceled, determining to increase the power of PRACH retransmission when at least one transmission in the N preamble code retransmissions is not canceled.

[0041] In the above embodiment, the terminal can determine to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled based on the first indication information of the network device, so as to reasonably allocate power and save power consumption of the terminal.

[0042] In combination with some embodiments of the first aspect, in some embodiments, the terminal determines whether to increase the power based on the situation of N repeated transmissions of the preamble code, including: receiving second indication information sent by the network device, wherein the second indication information is used to instruct the terminal to keep the power of the PRACH retransmission unchanged when the N repeated transmissions of the preamble code are all canceled; based on the second indication information and the situation that the N repeated transmissions of the preamble code are canceled, determining to keep the power of the PRACH retransmission unchanged when the N repeated transmissions of the preamble code are all canceled.

[0043] In the above embodiment, the terminal can determine, based on the first indication information of the network device, to keep the PRACH retransmission power unchanged when N preamble code retransmissions are canceled, thereby reasonably allocating power and saving power consumption of the terminal.

[0044] In combination with some embodiments of the first aspect, in some embodiments, the terminal determines whether to increase power based on the situation of N repeated transmissions of the preamble code, including: determining that at least one transmission in the N repeated transmissions of the preamble code is canceled based on the first condition, and determining that the power of the PRACH retransmission remains unchanged.

[0045] In the above embodiment, the terminal can determine to keep the power of PRACH retransmission unchanged when at least one transmission in N preamble code retransmissions is canceled based on the first condition, and can reasonably perform power allocation to save power consumption of the terminal.

[0046] In combination with some embodiments of the first aspect, in some embodiments, the terminal determines whether to increase the power based on the situation of N repeated transmissions of the preamble code, including: determining that P transmissions out of the N repeated transmissions of the preamble code are canceled based on the first condition, and determining to increase the power of the PRACH retransmission, wherein P is an integer less than or equal to the first value, and the first value is an integer less than N; or determining that Q transmissions out of the N repeated transmissions of the preamble code are canceled based on the first condition, and determining that the power of the PRACH retransmission remains unchanged, wherein Q is an integer greater than the first value, and the first value is an integer less than N.

[0047] In the above embodiment, the terminal can determine that the power of PRACH retransmission is increased when less than or equal to the first value of transmissions are canceled based on the first condition among N repeated transmissions of the preamble code, or determine that the power of PRACH retransmission is kept unchanged when more than the first value of transmissions are canceled based on the first condition among N repeated transmissions of the preamble code, so that power allocation can be performed reasonably and power consumption of the terminal can be saved.

[0048] In combination with some embodiments of the first aspect, in some embodiments, the above method also includes: the terminal determines the first value based on a protocol agreement; or determines the first value based on configuration information sent by the network device.

[0049] In the above embodiment, the terminal may determine the first value based on the protocol agreement or the configuration information of the network device, and determine whether to increase the power of the PRACH retransmission according to the first value and the N times of repeated transmission of the preamble code.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the first condition includes at least one of the following:

[0051] Resource conflicts;

[0052] Transmission power reduction due to power allocation;

[0053] Transmission cancellation due to power allocation.

[0054] In conjunction with some embodiments of the first aspect, in some embodiments, resource conflict includes at least one of the following:

[0055] Scheduled to be transmitted in the same time slot as other uplink transmissions except preamble transmission;

[0056] The interval between uplink transmissions other than preamble transmissions does not meet specific conditions;

[0057] There is time domain overlap between the TDD frequency band and other downlink transmissions except preamble transmission;

[0058] There is time domain overlap between the TDD frequency band and downlink symbol transmission except for preamble transmission;

[0059] For HD-FDD terminals, there is time domain overlap with other downlink transmissions except preamble transmission.

[0060] In combination with some embodiments of the first aspect, in some embodiments, other uplink transmissions except preamble transmission include at least one of PUCCH transmission, PUSCH transmission and SR transmission.

[0061] In combination with some embodiments of the first aspect, in some embodiments, other downlink transmissions except preamble transmission include at least one of PDCCH transmission, PDSCH transmission and CSI-RS transmission.

[0062] In a second aspect, an embodiment of the present disclosure provides a power control method, which is performed by a network device, comprising: sending first information to a terminal; wherein the first information includes at least one of the following:

[0063] First indication information, where the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled;

[0064] Second indication information, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled;

[0065] Configuration information, wherein the configuration information is used to indicate a first value, and the first value is used for the terminal to increase the power of PRACH retransmission when P transmissions out of N preamble code retransmissions are canceled based on a first condition, wherein P is less than or equal to the first value, and the first value is an integer less than N; or the first value is used for the terminal to maintain the power of PRACH retransmission unchanged when Q transmissions out of N preamble code retransmissions are canceled based on the first condition, wherein Q is greater than the first value, and the first value is an integer less than N.

[0066] In the above embodiment, the network device can instruct the terminal to increase the power of PRACH retransmission according to the N-times preamble code retransmission, thereby reasonably allocating power and saving power consumption of the terminal.

[0067] In conjunction with some embodiments of the second aspect, in some embodiments, the first condition includes at least one of the following:

[0068] Resource conflicts;

[0069] Transmission power reduction due to power allocation;

[0070] Transmission cancellation due to power allocation.

[0071] In conjunction with some embodiments of the second aspect, in some embodiments, the resource conflict includes at least one of the following:

[0072] Scheduled to be transmitted in the same time slot as other uplink transmissions except preamble transmission;

[0073] The interval between uplink transmissions other than preamble transmissions does not meet specific conditions;

[0074] There is time domain overlap between the TDD frequency band and other downlink transmissions except preamble transmission;

[0075] There is time domain overlap between the TDD frequency band and downlink symbol transmission except for preamble transmission;

[0076] For HD-FDD terminals, there is time domain overlap with other downlink transmissions except preamble transmission.

[0077] In combination with some embodiments of the first aspect, in some embodiments, other uplink transmissions except preamble transmission include at least one of PUCCH transmission, PUSCH transmission and SR transmission.

[0078] In combination with some embodiments of the first aspect, in some embodiments, other downlink transmissions except preamble transmission include at least one of PDCCH transmission, PDSCH transmission and CSI-RS transmission.

[0079] In a third aspect, an embodiment of the present disclosure proposes a terminal, which includes at least one of a transceiver module and a processing module; wherein the terminal is used to execute the optional implementation method of the first aspect.

[0080] In a fourth aspect, an embodiment of the present disclosure proposes a network device, which includes at least one of a transceiver module and a processing module; wherein the network device is used to execute the optional implementation method of the second aspect.

[0081] In a fifth aspect, an embodiment of the present disclosure proposes a terminal, which includes: one or more processors; a memory coupled to the processor, wherein the memory stores instructions, and when the instructions are executed by the processor, the terminal is used to execute the optional implementation method of the first aspect.

[0082] In a sixth aspect, an embodiment of the present disclosure proposes a network device, which includes: one or more processors; a memory coupled to the processor, on which instructions are stored, and when the instructions are executed by the processor, the network device is used to execute the optional implementation method of the second aspect.

[0083] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the optional implementation manner of the first aspect, and the network device is configured to execute the method described in the optional implementation manner of the second aspect.

[0084] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0085] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0086] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0087] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0088] It is understandable that the above-mentioned terminals, network devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0089] The present disclosure provides a power control method, a terminal, and a network device. In some embodiments, the terms power control method, information processing method, communication method, etc. can be used interchangeably.

[0090] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0091] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0092] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0093] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0094] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0095] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0096] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0097] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0098] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0099] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0100] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0101] In some embodiments, terms such as "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 less than", and "above" can be replaced with each other, and terms such as "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", and "below" can be replaced with each other.

[0102] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0103] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0104] 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", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0105] 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, etc. can be used interchangeably.

[0106] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0107] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0108] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0109] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0110] In some embodiments, when the network device is LMF, the information sent and received between the terminal and the network device can be sent and received through AMF.

[0111] In some embodiments, when the network device is LMF, the information sent and received between the terminal and the network device can be sent and received through AMF and access network equipment.

[0112] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0113] FIG1 is an architecture diagram of a communication system provided by an embodiment of the present disclosure.

[0114] As shown in FIG1 , a communication system 100 includes a terminal 10 and a network device 20 .

[0115] In some embodiments, the terminal 10 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, 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, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0116] In some embodiments, the network device 20 may include at least one of an access network device and a core network device.

[0117] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (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, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0118] In some embodiments, the core network device may be a single device including a first network function, a second network function, etc., or may be a plurality of devices or a group of devices each including all or part of the first network function, the second network function, etc. The network function may be virtual or physical. The core network may include, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0119] In some embodiments, the first network function is, for example, an access and mobility management function (AMF).

[0120] In some embodiments, the first network function is used for access control and mobility management of the terminal accessing the operator network, for example, including functions such as mobile status management, allocation of user temporary identity, authentication and authorization of users, etc., and its name is not limited to this.

[0121] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0122] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0123] The embodiments of the present disclosure may 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), and the like. band, UWB), 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), systems using other communication methods, and next-generation systems based on them. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G) for application.

[0124] In the related art, a PRACH transmission method is proposed, which is a PRACH transmission with multiple preamble code retransmissions. For the power boost of PRACH retransmissions, it is necessary to determine how the terminal controls the power boost of PRACH retransmissions when performing PRACH transmissions with multiple preamble code retransmissions. This is an urgent problem to be solved.

[0125] Based on this, embodiments of the present disclosure provide a power control method, terminal, and network device. The method, performed by the terminal, includes: determining to perform a PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; and determining whether to increase the power of the PRACH retransmissions based on the number of preamble retransmissions. Thus, the terminal can determine whether to increase the power of the PRACH retransmissions based on the number of preamble retransmissions, enabling reasonable power allocation and saving terminal power consumption.

[0126] FIG2A is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG2A , the embodiment of the present disclosure relates to a power control method, which includes:

[0127] S201A: The terminal determines to perform PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; and determines whether to increase the power of the PRACH retransmission according to the N preamble retransmissions.

[0128] It can be understood that for PRACH transmissions with N preamble repetitions (multiple PRACH transmissions), the terminal may simultaneously send N preambles in one PRACH transmission, where N is an integer greater than 1, and the N preambles may be the same or different.

[0129] It can also be understood that if the terminal determines to perform PRACH retransmission, N preamble codes may be sent again simultaneously in one PRACH retransmission, and the N preamble codes may be the same or different.

[0130] In the disclosed embodiment, the terminal determines to perform PRACH transmission with N preamble retransmissions, and determines whether to increase the power of the PRACH retransmission when performing the PRACH retransmission according to the N preamble retransmissions.

[0131] In some embodiments, the N-times preamble retransmission includes at least one of the following:

[0132] N repeated transmissions of the preamble were successful;

[0133] N repeated transmissions of the preamble are all cancelled;

[0134] N repeated transmissions of the preamble code failed;

[0135] At least one transmission in N repeated preamble transmissions is canceled;

[0136] At least one of the N repeated transmissions of the preamble code is successful;

[0137] At least one of the N preamble code retransmissions fails.

[0138] In some embodiments, at least one of the N preamble repetitions is canceled, including in at least one of the following circumstances:

[0139] At least one of the N repeated preamble transmissions is canceled due to time domain overlap with a specific uplink transmission;

[0140] At least one of the N preamble code repetition transmissions is canceled due to time domain overlap with a specific downlink transmission;

[0141] At least one of the N preamble retransmissions is canceled because it is scheduled to be transmitted in the same time slot as a specific uplink transmission;

[0142] At least one of the N preamble retransmissions is canceled because the interval between the preamble and a specific uplink transmission does not meet a specific condition;

[0143] At least one of the N preamble code repetition transmissions is canceled due to a reduction in transmission power caused by power allocation;

[0144] At least one transmission among the N repetitions of the preamble is cancelled due to power allocation.

[0145] In some embodiments, the specific uplink transmission includes at least one of an uplink channel transmission and an uplink signal transmission, and the specific downlink transmission includes at least one of a downlink channel transmission and a downlink signal transmission.

[0146] In some embodiments, the specific uplink transmission includes at least one of PUCCH, PUSCH and SR.

[0147] In some embodiments, the specific downlink transmission includes at least one of PDCCH, PDSCH and CSI-RS.

[0148] In some embodiments, the power of the PRACH retransmission is the transmit power of the PRACH retransmission.

[0149] In some embodiments, the terminal determines, based on the N preamble code retransmissions, to increase the power of the PRACH retransmission if at least one transmission in the N preamble code retransmissions is not canceled.

[0150] In some embodiments, the terminal determines, based on the N preamble code retransmissions, that the N preamble code retransmissions are all cancelled, and maintains the power of the PRACH retransmission unchanged.

[0151] In some embodiments, the terminal determines whether to increase the power based on the situation of N repeated transmissions of the preamble code, including: according to the protocol agreement, determining that at least one transmission in the N repeated transmissions of the preamble code is not canceled, and determining to increase the power of the PRACH retransmission; or according to the protocol agreement, determining that all N repeated transmissions of the preamble code are canceled, and determining that the power of the PRACH retransmission remains unchanged.

[0152] In the embodiment of the present disclosure, the terminal may determine, according to the protocol agreement, that at least one transmission in N repeated preamble transmissions is not canceled, and determine to increase the power of the PRACH retransmission.

[0153] In the embodiment of the present disclosure, the terminal may determine that N preamble code retransmissions are all canceled according to the protocol agreement, and determine that the power of the PRACH retransmission remains unchanged.

[0154] In some embodiments, the terminal determines, based on instructions from a network device, that at least one of the N preamble code repetition transmissions is not canceled and determines to increase the power of PRACH retransmission when the network device indicates that the terminal has increased the power of PRACH retransmission after at least one of the N preamble code retransmissions is not canceled, or determines, based on instructions from a network device, that all N preamble code repetition transmissions are canceled and that the power of PRACH retransmission remains unchanged when the network device indicates that the terminal has cancelled all N preamble code retransmissions and maintained the power of PRACH retransmission.

[0155] In some embodiments, the terminal sends a request message to the network device, requesting the network device to send the above-mentioned indication, and then determines according to the indication of the network device that at least one transmission in the N repeated transmissions of the preamble code is not canceled, and determines to increase the power of the PRACH retransmission, or determines according to the indication of the network device that all N repeated transmissions of the preamble code are canceled, and determines that the power of the PRACH retransmission remains unchanged.

[0156] In some embodiments, the network device reuses existing signaling or messages to send the above indication to the terminal, or uses new signaling or messages to send the above indication to the terminal.

[0157] In some embodiments, the terminal reuses existing signaling or messages to send the request message to the network device, or uses new signaling or messages to send the request message to the network device.

[0158] In some embodiments, the terminal determines whether to increase power based on N repeated preamble transmissions, including: determining that at least one transmission in the N repeated preamble transmissions is canceled based on the first condition, and determining that the power of PRACH retransmission remains unchanged.

[0159] In the embodiment of the present disclosure, when the terminal determines that at least one transmission among N preamble code retransmissions is canceled based on the first condition, the terminal can keep the power of PRACH retransmission unchanged.

[0160] In some embodiments, the terminal determines whether to increase the power based on the situation of N repeated transmissions of the preamble code, including: determining that P transmissions out of the N repeated transmissions of the preamble code are canceled based on the first condition, and determining to increase the power of the PRACH retransmission, where P is an integer less than or equal to a first value, and the first value is an integer less than N; or determining that Q transmissions out of the N repeated transmissions of the preamble code are canceled based on the first condition, and determining that the power of the PRACH retransmission remains unchanged, where Q is an integer greater than the first value, and the first value is an integer less than N.

[0161] In an embodiment of the present disclosure, when the terminal determines that P transmissions out of N preamble code retransmissions are canceled based on a first condition and P is less than or equal to a first value, the terminal determines to increase the power of PRACH retransmission, where the first value is an integer less than N.

[0162] Exemplarily, N is 8, the first value is 4, P is 2, and P is less than the first value. When the terminal determines that 2 of the 8 preamble code retransmissions are canceled based on the first condition, the terminal determines to increase the power of PRACH retransmission.

[0163] In an embodiment of the present disclosure, when the terminal determines that Q transmissions out of N preamble code retransmissions are canceled based on a first condition and Q is greater than a first value, the terminal determines that the power of PRACH retransmission remains unchanged, where the first value is an integer less than N.

[0164] Exemplarily, N is 8, the first value is 4, and Q is 6. When the terminal determines that 6 of the 8 preamble code retransmissions are canceled based on the first condition, the terminal determines that the power of the PRACH retransmission remains unchanged.

[0165] In some embodiments, the terminal determines the first value based on a protocol agreement, or determines the first value based on an instruction from a network device.

[0166] In some embodiments, the first value is N / 2.

[0167] In some embodiments, the first value is an N-offset value.

[0168] In some embodiments, the terminal determines the offset value based on a protocol agreement, or determines the offset value based on an instruction from a network device.

[0169] In some embodiments, the first condition includes at least one of the following:

[0170] Resource conflicts;

[0171] Transmission power reduction due to power allocation;

[0172] Transmission cancellation due to power allocation.

[0173] In some embodiments, upon determining that at least one transmission among the N preamble retransmissions is cancelled due to resource conflict, the terminal maintains the power of the PRACH retransmission unchanged.

[0174] In some embodiments, when determining that the transmission power reduction caused by power allocation is canceled for at least one transmission in the N preamble retransmissions, the terminal keeps the power of the PRACH retransmission unchanged.

[0175] In some embodiments, when determining that at least one transmission among N preamble retransmissions is canceled due to power allocation, the terminal maintains the power of the PRACH retransmission unchanged.

[0176] In some embodiments, when the terminal determines that less than or equal to a first value of transmissions among N preamble code retransmissions are canceled due to resource conflicts, the terminal increases the power of PRACH retransmission, where the first value is an integer less than N; or when it determines that more than a first value of transmissions among N preamble code retransmissions are canceled due to resource conflicts, the terminal maintains the power of PRACH retransmission unchanged, where the first value is an integer less than N.

[0177] In some embodiments, when it is determined that among the N times of repeated transmission of the preamble code, the transmission power reduction caused by the power allocation is canceled for a number of times less than or equal to the first value, the terminal increases the power of the PRACH retransmission, where the first value is an integer less than N; or when it is determined that among the N times of repeated transmission of the preamble code, the transmission power reduction caused by the power allocation is canceled for a number of times greater than the first value, the terminal maintains the power of the PRACH retransmission unchanged, where the first value is an integer less than N.

[0178] In some embodiments, when the terminal determines that less than or equal to a first value of transmissions among N repeated transmissions of the preamble code are canceled due to power allocation, the terminal increases the power of PRACH retransmission, where the first value is an integer less than N; or when it determines that more than a first value of transmissions among N repeated transmissions of the preamble code are canceled due to power allocation, the terminal maintains the power of PRACH retransmission unchanged, where the first value is an integer less than N.

[0179] In some embodiments, resource conflicts include at least one of the following:

[0180] Scheduled to be transmitted in the same time slot as other uplink transmissions except preamble transmission;

[0181] The interval between uplink transmissions other than preamble transmissions does not meet specific conditions;

[0182] The time division duplex (TDD) frequency band overlaps with other downlink transmissions except the preamble transmission;

[0183] There is time domain overlap between the TDD frequency band and downlink symbol transmission except for preamble transmission;

[0184] For half-duplex frequency division duplex (HD-FDD) terminals, there is time domain overlap with other downlink transmissions except preamble transmission.

[0185] In some embodiments, the terminal maintains the power of PRACH retransmission unchanged when determining that at least one transmission in N preamble code retransmissions is cancelled due to being scheduled to be transmitted in the same time slot as other uplink transmissions other than the preamble code transmission.

[0186] In some embodiments, when the terminal determines that at least one transmission among N preamble code retransmissions is cancelled due to the interval between the transmission and other uplink transmissions other than the preamble code transmission not meeting a specific condition, the terminal maintains the power of the PRACH retransmission unchanged.

[0187] In some embodiments, when the terminal determines that at least one transmission in N preamble code retransmissions is cancelled due to time domain overlap between the TDD frequency band and other downlink transmissions, the terminal maintains the power of the PRACH retransmission unchanged.

[0188] In some embodiments, when the terminal determines that at least one transmission in N preamble code repetition transmissions is cancelled due to time domain overlap between the TDD frequency band and the downlink symbol transmission, the terminal maintains the power of the PRACH retransmission unchanged.

[0189] In some embodiments, when the terminal determines that at least one transmission in N preamble code retransmissions is based on an HD-FDD terminal and the transmission is cancelled due to time domain overlap with other downlink transmissions, the terminal maintains the power of the PRACH retransmission unchanged.

[0190] In some embodiments, other uplink transmissions except preamble transmission include at least one of physical uplink control channel (PUCCH) transmission, physical uplink shared channel (PUSCH) transmission and scheduling request (SR) transmission.

[0191] In some embodiments, other downlink transmissions except preamble transmission include at least one of physical downlink control channel (PDCCH) transmission, physical downlink shared channel (PDSCH) transmission and channel state information reference signal (CSI-RS) transmission.

[0192] In some embodiments, the TDD frequency band overlaps with other downlink transmissions in the time domain, including at least one of the following:

[0193] The effective random access channel occasion (RO) of the preamble transmission overlaps with the PDCCH in the time domain;

[0194] The effective RO of the preamble transmission overlaps with the semi-persistent-schedule (SPS) PDSCH in the time domain;

[0195] There is time domain overlap between the effective RO of the preamble transmission and the SPS CSI-RS;

[0196] There is a time domain overlap between the effective RO transmitted by the preamble and the downlink symbol indicated by the network device through cell-specific high-layer signaling or terminal-specific high-layer signaling.

[0197] In some embodiments, a HD-FDD terminal has time domain overlap with other downlink transmissions, including at least one of the following:

[0198] The effective RO of the preamble transmission overlaps with the common search space (CSS) in the time domain;

[0199] The effective RO of the preamble transmission overlaps with the user equipment specific search space (UE-specific Search Space, USS) PDCCH in the time domain;

[0200] There is a time domain overlap between the effective RO of the preamble transmission and the SPS PDSCH;

[0201] There is time domain overlap between the effective RO and CSI-RS of the preamble transmission;

[0202] The effective RO of the preamble transmission overlaps with the downlink PRS in the time domain;

[0203] There is a time domain overlap between the effective RO of the preamble transmission and the dynamic grant (DG) PDSCH;

[0204] There is a time domain overlap between the preamble transmission and the synchronization signal physical broadcast channel block (SSB);

[0205] The switching time interval between the effective RO and SSB of the preamble transmission cannot be guaranteed by scheduling;

[0206] The effective RO of preamble transmission and the switching time interval of CSS PDCCH cannot be guaranteed by scheduling.

[0207] In some embodiments, the names of information, etc. 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", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0208] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0209] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0210] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0211] 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 may be used interchangeably.

[0212] In some embodiments, terms such as "synchronization signal (SS)", "synchronization signal block (SSB)", "reference signal (RS)", "pilot", and "pilot signal" can be used interchangeably.

[0213] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0214] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0215] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0216] By implementing the embodiments of the present disclosure, a terminal determines to perform a PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; and determines whether to increase the power of the PRACH retransmission based on the number of preamble retransmissions. Thus, the terminal can determine whether to increase the power of the PRACH retransmission based on the number of preamble retransmissions, thereby enabling reasonable power allocation and saving terminal power consumption.

[0217] FIG2B is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG2B , the embodiment of the present disclosure relates to a power control method, which includes:

[0218] S201B: The terminal determines to perform PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1.

[0219] Among them, the optional implementation of S201B can refer to the optional implementation of S201A in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0220] S202B: The network device sends first indication information to the terminal.

[0221] In some embodiments, the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled.

[0222] In some embodiments, the network device reuses existing signaling or messages to send the first indication information to the terminal, or uses new signaling or messages to send the first indication information to the terminal.

[0223] In some embodiments, the network device sends the first indication information to the terminal on its own, or sends the first indication information to the terminal when specific conditions are met.

[0224] Exemplarily, when receiving a request message sent by a terminal, the network device sends first indication information to the terminal.

[0225] S203B: Based on the first indication information and the fact that the N preamble retransmissions are canceled, the terminal determines to increase the power of the PRACH retransmission when at least one transmission in the N preamble retransmissions is not canceled.

[0226] In an embodiment of the present disclosure, a terminal receives first indication information sent by a network device, where the first indication information is used to instruct the terminal to increase the power of PRACH retransmissions if at least one transmission in N preamble retransmissions is not canceled. Thus, upon receiving the first indication information sent by the network device, the terminal can determine to increase the power of PRACH retransmissions if at least one transmission in N preamble retransmissions is not canceled.

[0227] By implementing the embodiments of the present disclosure, the terminal determines to perform a PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; the network device sends first indication information to the terminal, and the first indication information is used to instruct the terminal to increase the power of the PRACH retransmission when at least one transmission in the N preamble retransmissions is not canceled. The terminal determines to increase the power of the PRACH retransmission when at least one transmission in the N preamble retransmissions is not canceled based on the first indication information and the fact that the N preamble retransmissions are canceled. Thus, the terminal can determine whether to increase the power of the PRACH retransmission based on the situation of multiple preamble retransmissions, and can reasonably perform power allocation and save power consumption of the terminal.

[0228] FIG2C is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG2C , the embodiment of the present disclosure relates to a power control method, which includes:

[0229] S201C: The terminal determines to perform PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1.

[0230] Among them, the optional implementation of S201C can refer to the optional implementation of S201A in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0231] S202C: The network device sends second indication information to the terminal.

[0232] In some embodiments, the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled.

[0233] In some embodiments, the network device reuses existing signaling or messages to send the second indication information to the terminal, or uses new signaling or messages to send the second indication information to the terminal.

[0234] In some embodiments, the network device sends the second indication information to the terminal on its own, or sends the second indication information to the terminal when a specific condition is met.

[0235] Exemplarily, when receiving a request message sent by a terminal, the network device sends second indication information to the terminal.

[0236] S203C: Based on the second indication information and the fact that the N preamble retransmissions are canceled, the terminal determines to keep the PRACH retransmission power unchanged when all the N preamble retransmissions are canceled.

[0237] In an embodiment of the present disclosure, a terminal receives second indication information sent by a network device, where the second indication information is used to instruct the terminal to maintain the power of PRACH retransmissions unchanged when all N preamble retransmissions are canceled. Thus, upon receiving the second indication information sent by the network device, the terminal can determine to maintain the power of PRACH retransmissions unchanged when all N preamble retransmissions are canceled.

[0238] By implementing the embodiment of the present disclosure, the terminal determines to perform PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; the network device sends a second indication message to the terminal, and the second indication message is used to instruct the terminal to keep the power of PRACH retransmission unchanged when all N preamble retransmissions are canceled. The terminal determines to keep the power of PRACH retransmission unchanged when all N preamble retransmissions are canceled based on the second indication message and the fact that the N preamble retransmissions are canceled. Thus, the terminal can determine whether to increase the power of PRACH retransmission based on the situation of multiple preamble retransmissions, and can reasonably perform power allocation and save power consumption of the terminal.

[0239] FIG2D is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG2D , the embodiment of the present disclosure relates to a power control method, which includes:

[0240] S201D: The terminal determines to perform PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1.

[0241] Among them, the optional implementation of S201D can refer to the optional implementation of S201A in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0242] S202D: The network device sends configuration information to the terminal.

[0243] In some embodiments, the configuration information is used to indicate the first value.

[0244] In some embodiments, the network device reuses existing signaling or messages to send configuration information to the terminal, or uses new signaling or messages to send configuration information to the terminal.

[0245] In some embodiments, the configuration information indicates that the first value is N / 2.

[0246] In some embodiments, the configuration information indicates an offset value, and the first value is N-offset value.

[0247] S203D, the terminal determines that P transmissions out of N preamble code repetition transmissions are canceled based on the first condition, and determines to increase the power of PRACH retransmission, where P is an integer less than or equal to a first value, and the first value is an integer less than N; or determines that Q transmissions out of N preamble code repetition transmissions are canceled based on the first condition, and determines that the power of PRACH retransmission remains unchanged, where Q is an integer greater than the first value, and the first value is an integer less than N.

[0248] In an embodiment of the present disclosure, when the terminal determines that P transmissions out of N preamble code retransmissions are canceled based on a first condition and P is less than or equal to a first value, the terminal determines to increase the power of PRACH retransmission, where the first value is an integer less than N.

[0249] Exemplarily, N is 8, the first value is 4, P is 2, and P is less than the first value. When the terminal determines that 2 of the 8 preamble code retransmissions are canceled based on the first condition, the terminal determines to increase the power of PRACH retransmission.

[0250] In an embodiment of the present disclosure, when the terminal determines that Q transmissions out of N preamble code retransmissions are canceled based on a first condition and Q is greater than a first value, the terminal determines that the power of PRACH retransmission remains unchanged, where the first value is an integer less than N.

[0251] Exemplarily, N is 8, the first value is 4, and Q is 6. When the terminal determines that 6 of the 8 preamble code retransmissions are canceled based on the first condition, the terminal determines that the power of the PRACH retransmission remains unchanged.

[0252] In some embodiments, the first condition includes at least one of the following:

[0253] Resource conflicts;

[0254] Transmission power reduction due to power allocation;

[0255] Transmission cancellation due to power allocation.

[0256] In some embodiments, when the terminal determines that less than or equal to a first value of transmissions among N preamble code retransmissions are canceled due to resource conflicts, the terminal increases the power of PRACH retransmission, where the first value is an integer less than N; or when it determines that more than a first value of transmissions among N preamble code retransmissions are canceled due to resource conflicts, the terminal maintains the power of PRACH retransmission unchanged, where the first value is an integer less than N.

[0257] In some embodiments, when it is determined that among the N times of repeated transmission of the preamble code, the transmission power reduction caused by the power allocation is canceled for a number of times less than or equal to the first value, the terminal increases the power of the PRACH retransmission, where the first value is an integer less than N; or when it is determined that among the N times of repeated transmission of the preamble code, the transmission power reduction caused by the power allocation is canceled for a number of times greater than the first value, the terminal maintains the power of the PRACH retransmission unchanged, where the first value is an integer less than N.

[0258] In some embodiments, when the terminal determines that less than or equal to a first value of transmissions among N repeated transmissions of the preamble code are canceled due to power allocation, the terminal increases the power of PRACH retransmission, where the first value is an integer less than N; or when it determines that more than a first value of transmissions among N repeated transmissions of the preamble code are canceled due to power allocation, the terminal maintains the power of PRACH retransmission unchanged, where the first value is an integer less than N.

[0259] In some embodiments, resource conflicts include at least one of the following:

[0260] Scheduled to be transmitted in the same time slot as other uplink transmissions except preamble transmission;

[0261] The interval between uplink transmissions other than preamble transmissions does not meet specific conditions;

[0262] There is time domain overlap between the TDD frequency band and other downlink transmissions except preamble transmission;

[0263] There is time domain overlap between the TDD frequency band and downlink symbol transmission except for preamble transmission;

[0264] For HD-FDD terminals, there is time domain overlap with other downlink transmissions except preamble transmission.

[0265] In some embodiments, other uplink transmissions except preamble transmission include at least one of PUCCH transmission, PUSCH transmission and SR transmission.

[0266] In some embodiments, other downlink transmissions except preamble transmission include at least one of PDCCH transmission, PDSCH transmission and CSI-RS transmission.

[0267] In some embodiments, the TDD frequency band overlaps with other downlink transmissions in the time domain, including at least one of the following:

[0268] There is a time domain overlap between the effective RO of the preamble transmission and the PDCCH;

[0269] There is a time domain overlap between the effective RO of the preamble transmission and the SPS PDSCH;

[0270] There is time domain overlap between the effective RO of the preamble transmission and the SPS CSI-RS;

[0271] There is a time domain overlap between the effective RO transmitted by the preamble and the downlink symbol indicated by the network device through cell-specific high-layer signaling or terminal-specific high-layer signaling.

[0272] In some embodiments, a HD-FDD terminal has time domain overlap with other downlink transmissions, including at least one of the following:

[0273] There is a time domain overlap between the effective RO and CSS of the preamble transmission;

[0274] There is a time domain overlap between the effective RO of the preamble transmission and the USS PDCCH;

[0275] There is a time domain overlap between the effective RO of the preamble transmission and the SPS PDSCH;

[0276] There is time domain overlap between the effective RO and CSI-RS of the preamble transmission;

[0277] The effective RO of the preamble transmission overlaps with the downlink PRS in the time domain;

[0278] There is a time domain overlap between the effective RO of the preamble transmission and the DG PDSCH;

[0279] There is time domain overlap between the preamble transmission and the synchronization signal block SSB;

[0280] The switching time interval between the effective RO and SSB of the preamble transmission cannot be guaranteed by scheduling;

[0281] The effective RO of preamble transmission and the switching time interval of CSS PDCCH cannot be guaranteed by scheduling.

[0282] By implementing the embodiments of the present disclosure, the terminal determines to perform a PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; the network device sends configuration information to the terminal, where the configuration information is used to indicate a first value; the terminal determines that P transmissions out of the N preamble retransmissions are canceled based on a first condition, and determines to increase the power of the PRACH retransmission, where P is an integer less than or equal to the first value, and the first value is an integer less than N; or determines that Q transmissions out of the N preamble retransmissions are canceled based on the first condition, and determines that the power of the PRACH retransmission remains unchanged, where Q is an integer greater than the first value, and the first value is an integer less than N. Thus, the terminal can determine whether to increase the power of the PRACH retransmission based on the situation of multiple preamble retransmissions, and can reasonably perform power allocation, saving power consumption of the terminal.

[0283] FIG3A is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a power control method, which is executed by a terminal and includes:

[0284] S301A: Determine to perform PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1.

[0285] Among them, the optional implementation of S301A can refer to the optional implementation of S201A in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0286] S302A, obtain first indication information.

[0287] Among them, the optional implementation of S302A can refer to the optional implementation of S202B in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0288] In some embodiments, the terminal receives the first indication information sent by the network device, but is not limited thereto, and may also receive the first indication information sent by other entities.

[0289] In some embodiments, the terminal obtains first indication information specified by a protocol.

[0290] In some embodiments, the terminal obtains the first indication information from an upper layer(s).

[0291] In some embodiments, the terminal performs processing to obtain the first indication information.

[0292] In some embodiments, S302A is omitted, and the terminal autonomously implements the function indicated by the first indication information, or the above function is default or acquiescent.

[0293] In some embodiments, the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled.

[0294] S302A: According to the first indication information and the fact that the N preamble code retransmissions are canceled, determine to increase the power of the PRACH retransmission when at least one transmission in the N preamble code retransmissions is not canceled.

[0295] Among them, the optional implementation of S303A can refer to the optional implementation of S203B in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0296] By implementing the embodiments of the present disclosure, the terminal determines to perform a PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; obtains first indication information, the first indication information being used to instruct the terminal to increase the power of the PRACH retransmission when at least one transmission in the N preamble retransmissions is not canceled. The terminal determines to increase the power of the PRACH retransmission when at least one transmission in the N preamble retransmissions is not canceled based on the first indication information and the fact that the N preamble retransmissions are canceled. Thus, the terminal can determine whether to increase the power of the PRACH retransmission based on the situation of multiple preamble retransmissions, thereby being able to reasonably perform power allocation and save power consumption of the terminal.

[0297] FIG3B is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a power control method, which is executed by a terminal and includes:

[0298] S301B: Determine to perform PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1.

[0299] Among them, the optional implementation of S301B can refer to the optional implementation of S201A in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0300] S302B: Obtain second indication information.

[0301] Among them, the optional implementation of S302B can refer to the optional implementation of S202C in Figure 2C and other related parts in the embodiment involved in Figure 2C, which will not be repeated here.

[0302] In some embodiments, the terminal receives the second indication information sent by the network device, but is not limited thereto, and may also receive the second indication information sent by other entities.

[0303] In some embodiments, the terminal obtains second indication information specified by the protocol.

[0304] In some embodiments, the terminal obtains the second indication information from an upper layer(s).

[0305] In some embodiments, the terminal performs processing to obtain the second indication information.

[0306] In some embodiments, S302B is omitted, and the terminal autonomously implements the function indicated by the second indication information, or the above function is default or acquiescent.

[0307] In some embodiments, the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled.

[0308] S303B: According to the second indication information and the fact that the N preamble retransmissions are canceled, determine to keep the PRACH retransmission power unchanged when all the N preamble retransmissions are canceled.

[0309] Among them, the optional implementation of S303B can refer to the optional implementation of S203C in Figure 2C and other related parts in the embodiment involved in Figure 2C, which will not be repeated here.

[0310] By implementing the embodiment of the present disclosure, the terminal determines to perform PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; obtains second indication information, and the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when all N preamble retransmissions are canceled. The terminal determines to keep the power of PRACH retransmission unchanged when all N preamble retransmissions are canceled based on the second indication information and the fact that the N preamble retransmissions are canceled. Thus, the terminal can determine whether to increase the power of PRACH retransmission based on the situation of multiple preamble retransmissions, and can reasonably perform power allocation and save power consumption of the terminal.

[0311] FIG3C is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG3B , an embodiment of the present disclosure relates to a power control method, which is executed by a terminal and includes:

[0312] S301C: Determine to perform PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1.

[0313] Among them, the optional implementation of S301C can refer to the optional implementation of S201A in Figure 2A and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0314] S302C: Acquire configuration information, where the configuration information is used to indicate a first value.

[0315] Among them, the optional implementation of S302C can refer to the optional implementation of S202D in Figure 2D and other related parts in the embodiment involved in Figure 2D, which will not be repeated here.

[0316] In some embodiments, the terminal receives configuration information sent by a network device, but is not limited thereto and may also receive configuration information sent by other entities.

[0317] In some embodiments, the terminal obtains configuration information specified by the protocol.

[0318] In some embodiments, the terminal obtains configuration information from upper layer(s).

[0319] In some embodiments, the terminal performs processing to obtain the configuration information.

[0320] In some embodiments, S302C is omitted, and the terminal autonomously implements the functions indicated by the configuration information, or the above functions are default or acquiescent.

[0321] In some embodiments, the configuration information indicates that the first value is N / 2.

[0322] In some embodiments, the configuration information indicates an offset value, and the first value is N-offset value.

[0323] S303C, determining that P transmissions out of N preamble code retransmissions are canceled based on the first condition, and determining to increase the power of PRACH retransmission, where P is an integer less than or equal to a first value, and the first value is an integer less than N; or determining that Q transmissions out of N preamble code retransmissions are canceled based on the first condition, and determining that the power of PRACH retransmission remains unchanged, where Q is an integer greater than the first value, and the first value is an integer less than N.

[0324] Among them, the optional implementation of S303C can refer to the optional implementation of S203D in Figure 2D and other related parts in the embodiment involved in Figure 2D, which will not be repeated here.

[0325] In some embodiments, the first condition includes at least one of the following:

[0326] Resource conflicts;

[0327] Transmission power reduction due to power allocation;

[0328] Transmission cancellation due to power allocation.

[0329] In some embodiments, resource conflicts include at least one of the following:

[0330] Scheduled to be transmitted in the same time slot as other uplink transmissions except preamble transmission;

[0331] The interval between uplink transmissions other than preamble transmissions does not meet specific conditions;

[0332] There is time domain overlap between the TDD frequency band and other downlink transmissions except preamble transmission;

[0333] There is time domain overlap between the TDD frequency band and downlink symbol transmission except for preamble transmission;

[0334] For HD-FDD terminals, there is time domain overlap with other downlink transmissions except preamble transmission.

[0335] In some embodiments, other uplink transmissions except preamble transmission include at least one of PUCCH transmission, PUSCH transmission and SR transmission.

[0336] In some embodiments, other downlink transmissions except preamble transmission include at least one of PDCCH transmission, PDSCH transmission and CSI-RS transmission.

[0337] By implementing the embodiments of the present disclosure, the terminal determines to perform a PRACH transmission with N preamble retransmissions, where N is an integer greater than 1; obtains configuration information, where the configuration information is used to indicate a first value; the terminal determines that P transmissions out of the N preamble retransmissions are canceled based on a first condition, and determines to increase the power of the PRACH retransmission, where P is an integer less than or equal to the first value, and the first value is an integer less than N; or determines that Q transmissions out of the N preamble retransmissions are canceled based on the first condition, and determines that the power of the PRACH retransmission remains unchanged, where Q is an integer greater than the first value, and the first value is an integer less than N. Thus, the terminal can determine whether to increase the power of the PRACH retransmission based on the situation of multiple preamble retransmissions, and can reasonably perform power allocation, saving power consumption of the terminal.

[0338] FIG4 is a flow chart of a power control method according to an embodiment of the present disclosure. As shown in FIG4 , the embodiment of the present disclosure relates to a power control method, which is executed by a network device and includes:

[0339] S401, sending first information.

[0340] In some embodiments, the first information includes at least one of the following:

[0341] First indication information, where the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled;

[0342] Second indication information, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled;

[0343] Configuration information, wherein the configuration information is used to indicate a first value, and the first value is used for the terminal to increase the power of PRACH retransmission when P transmissions out of N preamble code retransmissions are canceled based on a first condition, wherein P is less than or equal to the first value, and the first value is an integer less than N; or the first value is used for the terminal to maintain the power of PRACH retransmission unchanged when Q transmissions out of N preamble code retransmissions are canceled based on the first condition, wherein Q is greater than the first value, and the first value is an integer less than N.

[0344] Among them, the optional implementation of S401 can refer to the optional implementation of S202B in Figure 2B and other related parts in the embodiment involved in Figure 2B, which will not be repeated here.

[0345] Among them, the optional implementation of S401 can refer to the optional implementation of S202C in Figure 2C and other related parts in the embodiment involved in Figure 2C, which will not be repeated here.

[0346] Among them, the optional implementation of S401 can refer to the optional implementation of S202D in Figure 2D and other related parts in the embodiment involved in Figure 2D, which will not be repeated here.

[0347] In some embodiments, the network device sends the first information to the terminal, but is not limited thereto, and may also send the first information to other entities.

[0348] Optionally, the first information is used by the terminal to determine, based on the first indication information and the cancellation of the N preamble retransmissions, whether or not at least one transmission in the N preamble retransmissions is canceled, whether to increase the power of the PRACH retransmission. For optional implementations, see the optional implementation of S203B in FIG. 2B and other related parts of the embodiment involved in FIG. 2B , which will not be described in detail here.

[0349] Optionally, the first information is used by the terminal to determine, based on the second indication information and the fact that the N preamble retransmissions are canceled, that the power of the PRACH retransmission is maintained unchanged when all N preamble retransmissions are canceled. For optional implementations thereof, see the optional implementation of S203C in FIG. 2C and other related parts of the embodiment involved in FIG. 2C , which will not be described in detail here.

[0350] Optionally, the first information is used by the terminal to determine whether less than or equal to a first value of transmissions among N preamble retransmissions are canceled based on a first condition, and to determine to increase the power of PRACH retransmissions, where the first value is an integer less than N; or to determine whether greater than a first value of transmissions among N preamble retransmissions are canceled based on the first condition, and to determine whether the power of PRACH retransmissions remains unchanged, where the first value is an integer less than N. For optional implementations, refer to the optional implementation of S203D in FIG. 2D and other related parts of the embodiment involved in FIG. 2D , which will not be described in detail here.

[0351] In some embodiments, the first condition includes at least one of the following:

[0352] Resource conflicts;

[0353] Transmission power reduction due to power allocation;

[0354] Transmission cancellation due to power allocation.

[0355] In some embodiments, resource conflicts include at least one of the following:

[0356] Scheduled to be transmitted in the same time slot as other uplink transmissions except preamble transmission;

[0357] The interval between uplink transmissions other than preamble transmissions does not meet specific conditions;

[0358] There is time domain overlap between the TDD frequency band and other downlink transmissions except preamble transmission;

[0359] There is time domain overlap between the TDD frequency band and downlink symbol transmission except for preamble transmission;

[0360] For HD-FDD terminals, there is time domain overlap with other downlink transmissions except preamble transmission.

[0361] In some embodiments, other uplink transmissions except preamble transmission include at least one of PUCCH transmission, PUSCH transmission and SR transmission.

[0362] In some embodiments, other downlink transmissions except preamble transmission include at least one of PDCCH transmission, PDSCH transmission and CSI-RS transmission.

[0363] In some embodiments, for PRACH coverage enhancement, it is proposed that multiple transmissions can be performed in the time domain, as shown below:

[0364] PRACH, power domain, and discrete fourier transformation-spreading-orthogonal frequency division multiplexing (DFT-S-OFDM) specify further uplink coverage enhancements.

[0365] The detailed objectives are as follows:

[0366] The following PRACH coverage enhancements are specified (RAN1, RAN2):

[0367] Multiple PRACH transmissions with the same beam are used for a 4-step random access channel (RACH) procedure.

[0368] Study and, if justified, assign PRACH transmissions with different beams for the 4-step RACH procedure.

[0369] NOTE 1: The PRACH enhancements are for frequency range 2 (FR2) and can also be applied to FR1 where applicable.

[0370] NOTE 2: The PRACH enhancements are specific to the short PRACH format and are applicable to other formats where applicable.

[0371] In some embodiments, for uplink power boosting of PRACH retransmissions, the PRACH channel will increase its transmit power by one step for each additional retransmission. Of course, if any of the following four conditions occurs, the physical layer will notify the higher layer to stop incrementing the power boost counter:

[0372] - The synchronization signal physical broadcast channel block (SSB) index used for random access opportunity (RACH occasion, RO) selection changes;

[0373] -Changes in the uplink transmission spatial filter;

[0374] -PRACH transmission power is reduced or transmission is cancelled due to power allocation;

[0375] - PRACH transmission cancellation due to resource contention.

[0376] Among them, PRACH transmission cancellation caused by resource conflict includes:

[0377] - When PRACH and other uplink channels / signals are scheduled or configured in the same time slot, or the gap between PRACH and other channels / signals does not meet the protocol requirements, the resulting possible cancellation of PRACH transmission;

[0378] -Possible PRACH transmission cancellation caused by time domain overlap between PRACH and downlink channels / signals in the time division duplex (TDD) band;

[0379] - For half-duplex frequency division duplex (HD-FDD) terminals, possible PRACH transmission cancellation due to time domain overlap between PRACH and downlink channels / signals.

[0380] In some embodiments, PRACH transmission collision handling:

[0381] After the physical layer determines a valid RO that can be used for PRACH transmission and receives a transmission indication from a higher layer (see below), the actual transmission may be canceled due to a conflict with transmissions on other channels.

[0382] 1> Instructs the physical layer to transmit the random access preamble using the selected PRACH opportunity, the corresponding random access radio network temporary identifier (RA-RNTI) (if available), the preamble index (PREAMBLE_INDEX) and the preamble received target power (PREAMBLE_RECEIVED_TARGET_POWER).

[0383] In some embodiments, conflicts between PRACH transmissions and other channel transmissions may include the following scenarios:

[0384] Solution 1: TDD band PRACH and downlink collision processing: The time overlap between the physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), and channel state information reference signal (CSI-RS) and PRACH.

[0385] Designed to operate on a single carrier in unpaired spectrum, if the terminal is configured by higher layers to transmit a sounding reference signal (SRS) or a physical uplink control channel (PUCCH), or a physical uplink shared channel (PUSCH), or a PRACH in a group of symbols in a timeslot, and the terminal detects downlink control information (DCI) format 1_0, DCI format 1_1, or DCI format 0_1, instructing the terminal to receive CSI-RS or PDSCH in a subset of symbols from the symbol set, then

[0386] If the first symbol in the PUCCH, PUSCH or PRACH appears at the T proc，2 If the value is within , the terminal does not want to cancel the transmission of PUCCH, PUSCH or PRACH in the symbol set;

[0387] Otherwise, the terminal shall cancel the PUCCH or PUSCH, or PRACH transmission in the symbol set.

[0388] T proc，2 is the PUSCH preparation time of the corresponding terminal processing capability, assuming d 2，1 =1 and μ corresponds to the minimum SCS configuration between the PDCCH carrying the DCI format and the SCS configuration of the SRS. For PUCCH, PUSCH, or μr, if PRACH is 15 kHz or higher, it corresponds to the SCS configuration of the PRACH; otherwise, μr=0.

[0389] For the N before the valid PRACH timing and the valid PRACH timing gap A set of symbols for a timeslot corresponding to a symbol. If reception overlaps with any symbol in the symbol set, the terminal will not receive PDCCH, PDSCH, or CSI-RS in the timeslot. The symbol set for the timeslot that the terminal does not want to be indicated as downlink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated.

[0390] When the dynamic grant (DG) PDSCH and DG CSI-RS overlap with the PRACH in the time domain, the terminal determines whether to transmit the PRACH or cancel the PRACH transmission and transmit the DG (dynamic grant) PDSCH and CSI-RS. This depends on the terminal implementation. In other words, the terminal may cancel the actual PRACH transmission.

[0391] When the PDCCH, SPS PDSCH, SPS CSI-RS overlap with a valid PRACH occasion in the time domain, the terminal will cancel the transmission of the downlink PDCCH, SPS PDSCH, SPS CSI-RS.

[0392] In addition, the terminal does not expect a valid PRACH occasion and N before the valid PRACH occasion. gap Symbols are indicated as downlink symbols by cell-specific higher layer signaling (tdd-UL-DL-ConfigurationCommon), UE-specific higher layer signaling (tdd-UL-DL-ConfigurationDedicated), and DCI format 2-0. The terminal does not transmit PRACH for downlink symbols indicated by the gNB via cell-specific or UE-specific higher layer signaling. The terminal does not expect the CORESET corresponding to the type 0 common search space (CSS) to be indicated as an uplink symbol.

[0393] When a terminal monitors DCI format 2-0 (slot format indication (SFI) indication) and a symbol is indicated as a flexible symbol, PDCCH-ordered PRACH can be transmitted on it, but PRACH triggered by media access control (MAC) or radio resource control (RRC) cannot be transmitted.

[0394] For a set of time slot symbols indicated as flexible time slots by tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated (if provided), or when tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated are not provided to the terminal, and if the terminal detects that DCI format 2_0 uses a time slot provision format other than a time slot format value of 255.

[0395] If one or more symbols in the symbol set are symbols in a CORESET configured for PDCCH monitoring by the terminal, the terminal will receive PDCCH in the CORESET only if the SFI index field value of the DCI format 2_0 indicates that one or more symbols are downlink symbols.

[0396] If the SFI index field value of DCI format 2_0 indicates that the symbol set of the time slot is flexible, and the terminal detects that DCI format 1_0, DCI format 1_1 or DCI format 0_1 ​​indicates that the terminal receives PDSCH or CSI-RS in the symbol set of the time slot, the terminal receives PDSCH or CSI-RS in the symbol set of the time slot.

[0397] If the SFI index field value of the DCI format 2_0 indicates that the symbol set of the time slot is flexible, and the terminal detects DCI format 0_0, DCI format 0_1, DCI format 1_0, DCI format 1_1, DCI format 2_3, or a random access response (RAR) uplink grant indicating that the terminal transmits PUSCH, PUCCH, PRACH or SRS in the symbol set of the time slot, the terminal transmits PUSCH, PUCCH, PRACH or SRS in the symbol set of the time slot.

[0398] If the SFI index field value of the DCI format 2_0 indicates that the symbol set of the time slot is flexible, and the terminal does not detect DCI format 1_0, DCI format 1_1 or DCI format 0_1, indicating that the terminal receives PDSCH or CSI-RS, or the terminal does not detect DCI format 0_0, DCI format 0_1, DCI format 1_0, DCI format 1_1, DCI format 2_3, or RAR uplink authorization, indicating that the terminal transmits PUSCH, PUCCH, PRACH or SRS in the symbol set of the time slot, the terminal will not send or receive in the symbol set of the time slot.

[0399] For symbols occupied by CORESET, if SFI monitoring is configured but no uplink or flexible indication of SFI is detected, the symbol is considered a downlink symbol and the terminal does not perform PDCCH ordered PRACH transmission on it.

[0400] If the terminal does not detect the SFI index field value of DCI format 2_0, indicating that the symbol set of the time slot is flexible or uplink, and the terminal does not detect DCI format 0_0, the terminal assumes that the flexible symbols in the CORESET configured for PDCCH monitoring by the terminal are downlink symbols, DCI format 0_1, DCI format 1_0, DCI format 1_1 or DCI format 2_3, indicating that the terminal transmits SRS, PUSCH, PUCCH or PRACH in the symbol set.

[0401] The terminal can perform PDCCH ordered PRACH transmissions on flexible symbols where no SFI indication is detected. However, for MAC or RRC triggered PRACH transmissions, if the terminal is configured to listen for SFI indications (DCI format 2-0), the PRACH transmission is not canceled if the gap between the last symbol of the CORESET and the first symbol of the PRACH is less than T_process,2. Otherwise, the PRACH transmission is canceled.

[0402] A set of symbols for a time slot indicated as flexible by tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated (if provided), or when tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated are not provided to the terminal and if the terminal does not detect that DCI format 2_0 is provided for the time slot.

[0403] If the terminal receives a corresponding indication through DCI format 1_0, DCI format 1_1, or DCI format 0_1, the terminal receives the PDSCH or CSI-RS in the symbol set of the time slot.

[0404] If the terminal receives a corresponding indication through DCI format 0_0, DCI format 0_1, DCI format 1_0, DCI format 1_1, DCI format 2_3 or RARUL grant, the terminal transmits PUSCH, PUCCH, PRACH or SRS in the symbol set of the time slot.

[0405] Terminal receives PDCCH: If the terminal is configured by higher layers to receive PDSCH or CSI-RS in the symbol set of a time slot, the terminal will not receive PDSCH or CSI-RS in the symbol set of the time slot.

[0406] If the terminal is configured by higher layers to transmit SRS, PUCCH, PUSCH or PRACH in the symbol set of a timeslot, the terminal:

[0407] If the first symbol of PUCCH or PUSCH or PRACH in a time slot occurs at T proc.2 In the time slot, relative to the last symbol of the CORESET, the terminal is configured to monitor the PDCCH of DCI format 2_0, and does not want to cancel the transmission of PUCCH, PUSCH or PRACH in the time slot. Otherwise, the terminal will cancel the PUCCH, PUSCH or PRACH transmission in the time slot.

[0408] Do not want to cancel T proc，2 The SRS transmission in the symbol set that occurs in , relative to the last symbol of the CORESET where the terminal is configured to monitor PDCCH of DCI format 2_0. The terminal cancels the SRS transmission in the remaining symbols of the symbol set.

[0409] T proc，2 is the PUSCH preparation time of the corresponding terminal processing capability, assuming d 2，1 =1, μ corresponds to the minimum SCS configuration between the SCS configuration of PDCCH carrying DCI format 2_0 and the SCS configuration of SRS, PUCCH, PUSCH or μ, where μ corresponds to the SCS configuration of PRACH (if it is 15kHz or higher); otherwise μ=O.

[0410] Solution 2: Collision handling between PRACH and other uplink (UL) channels or UL reference signals in Rel-15.

[0411] When the terminals are not in the same time slot, or when the time gap between PRACH and other uplink channels is less than N symbols, PRACH and other uplink channels are transmitted. Other channels include PUCCH, PUSCH and scheduling request (SR).

[0412] For single-cell operation or operation with carrier aggregation in the same frequency band, the terminal does not transmit PRACH and PUSCH / PUCCH / SRS in the same time slot, or when the gap between the first or last symbol of PRACH transmission in the first time slot and the gap between the last or first symbol are less than N symbols, they are PUSCH / PUCCH / SRS transmissions in the second time slot, respectively, where N=2 indicates μ=0 or μ=1, N=4 indicates μ=2 or μ=3, and μ is the SCS configuration for activating the UL bandwidth part (Bandwidth Part, BWP).

[0413] In any of the following cases, the terminal does not transmit PRACH and PUSCH / PUCCH / SRS simultaneously in a single component carrier (CC) and intra-band carrier aggregation (CA):

[0414] Same time slot;

[0415] When the gap between the end of PRACH (PUSCH / PUCCH / SRS) and the beginning of PUSCH / PUCCH / SRS (PRACH) is less than N symbols.

[0416] N=2 means 15kHz and 30kHz SCS.

[0417] N=4 represents 60kHz and 120kHz SCS.

[0418] The reference SCS used to determine N is the SCS of the UL BWP.

[0419] Inter-band CA;

[0420] The transmission of PRACH or SR (on PUCCH), if any, depends on the terminal implementation.

[0421] When the above overlap occurs, based on the RAN1 conclusion, which channel is transmitted depends on the terminal implementation.

[0422] Solution 3: PRACH transmission cancellation due to power allocation in Rel-15.

[0423] In case 1. (CCs / uplinks configured for the terminal have the same numerology and overlapping transmissions across different CCs / uplinks, with the same start time and the same PUSCH / PUCCH transmission duration and one or two PUCCH groups),

[0424] When the terminal is power-limited due to simultaneous transmission on multiple serving cells,

[0425] -PCell>PRACH and ACK (acknowledgement) / NACK (non-acknowledgement) of PUCCH / PUSCH and / or SR>PUCCH / PUSCH and other uplink control information (UCI)>PUSCH with / o UCI>SRS / PRACH of SCell.

[0426] In the same priority level, the primary cell (PCell) 1 takes precedence over the secondary cell (SCell).

[0427] If the transmit power exceeds Pcmax, scaling / dropping is applied to the lowest priority first until the aggregate power is within Pcmax. The exact scaling or dropping is left to the terminal implementation.

[0428] Note: Different priorities of SRS for carrier switching can be discussed further.

[0429] If the terminal does not transmit PRACH due to power allocation for PUSCH / PUCCH / PRACH / SRS transmission, or due to power allocation in E-UTRAN and NR dual connectivity (E-UTRA-NR Dual Connectivity, EN-DC) or NR and E-UTRAN dual connectivity (NR-E-UTRA Dual Connectivity, NE-DC) or New Radio (NR)-NR dual connectivity technology (NR-NR Dual Connectivity, NR-DC) operation, or due to slot format determination, or because PUSCH / PUCCH / PRACH / SRS transmission occasions are in the same slot, or the gap between PRACH transmission and PUSCH / PUCCH / SRS transmission is very small, Layer 1 notifies the upper layer to suspend the corresponding power ramp counter in the transmission occasion.

[0430] As shown above, in a CA or dual connectivity (DC) scenario, PRACH transmission on a scell may be canceled due to power allocation.

[0431] Solution 4: HD-FDD PRACH and DL collision handling.

[0432] For Type A HD-FDD terminals, all ROs applicable to RedCap terminals are valid. For SSB terminals that overlap with valid ROs,

[0433] In this case, from a cell-specific perspective, whether to receive SSB or transmit PRACH is left to the terminal to implement.

[0434] RO that differentiates between type A HD-FDD RedCap UE and FD FDD RedCap UE is not supported.

[0435] For case 8 where the valid RO in the type 0 / 0A / 1 / 2 CSS set overlaps with the PDCCH, is it to receive the configured PDCCH or transmit

[0436] PRACH is implemented by the terminal.

[0437] NOTE: Valid RO for PRACH triggered by PDCCH order is already covered in Case 2.

[0438] For case 8 where the effective RO overlaps with terminal-specific configured DL reception (e.g., PDCCH in USS, SPS PDSCH, CSI-RS, or DL ​​PRS), it is left to the terminal implementation whether to receive DL or transmit PRACH.

[0439] NOTE: Valid RO for PRACH triggered by PDCCH order is already covered in Case 2.

[0440] In the case where the effective RO and the dynamically scheduled DL reception overlap, whether to receive the dynamically scheduled EL or transmit the PRACH is implemented by the terminal.

[0441] For the "back-to-back" non-overlapping UL / DL case, where there is not enough gap between the cell-specific configuration DL and the cell-specific configuration UL, e.g., SSB or PDCCH "in CSS with valid RO", it is up to the UE implementation to ensure that the switching time is met.

[0442] For example, UE-specific Search Space (USS), SPS PDSCH, CSI-RS or DL ​​positioning

[0443] PDCCH and effective RO in the positioning reference signal (PRS).

[0444] It is left to the terminal implementation to cancel DL reception or UL transmission to ensure sufficient switching time.

[0445] For HD-FDD terminals, only uplink transmission or downlink reception can be performed at a time, even though the gNB operates in full-duplex mode. Given that a terminal can only perform either RX or TX at a time, similar to TDD bands, consideration must be given to resolving time-domain overlap between uplink PRACH transmissions and downlink transmissions.

[0446] In some embodiments, the overlap between PRACH and downlink transmission may occur in the following situations:

[0447] C1: When an overlap occurs between a valid RO and a Type 0 / 0A / 1 / 2 CSS, the terminal decides whether to send a PRACH or receive a PDCCH.

[0448] C2: When the valid RO and UE-dedicated configured DL reception, such as USS PDCCH, SPS PDSCH, CSI-RS or DL ​​PRS, overlap in time domain, the terminal decides whether to perform PRACH transmission or semi-static downlink reception.

[0449] C3: When valid RO overlaps with DG PDSCH or CSI-RS, it is up to the terminal to determine whether to perform DL reception or UL transmission.

[0450] C4: When SSB and PRACH transmissions overlap, the terminal also decides whether to perform DL reception or UL transmission.

[0451] C5: When the switching time interval between SSB / CSS PDCCH and RO cannot be guaranteed by scheduling, the terminal decides whether to cancel DL reception or UL transmission.

[0452] For multiple PRACH transmissions, multiple ROs mapped to one SSB may be used for multiple PRACH transmissions in one RACH attempt.

[0453] In some embodiments, multiple PRACH transmissions are supported to enhance PRACH coverage. If one or more (less than N) of the multiple (N) PRACH transmissions are canceled due to resource conflicts with other channels / signals, the terminal's power ramping method needs to be reconsidered.

[0454] This solution proposes a method to redefine the RO mask index under shared RO for multiple PRACH transmissions. This method allows for more reasonable allocation of ROs within the same PRACH resource configuration to different features or feature combinations. Furthermore, it further avoids excessive interference to other features or feature combinations sharing the same RACH configuration when cells support multiple PRACH transmissions.

[0455] Aspect 1: The protocol stipulates that when the number of transmission cancellations is less than N, the terminal's physical layer will not notify the higher layer of the power ramping counter suspending; when all N transmissions are canceled, the UE physical layer notifies the higher layer of the power ramping counter suspending.

[0456] Aspect 2: Based on the configuration or instruction of the base station, determine whether the terminal performs power ramping when the number of transmission cancellations is less than N.

[0457] Aspect 3: If a PRACH repetition is canceled due to resource conflict, the power boost timer is paused and incremented by 1.

[0458] Analysis: This is the preferred solution. This is primarily due to the consideration that if the terminal cancels a PRACH transmission, the gNB's PRACH detection failure is caused by insufficient PRACH transmissions. From a terminal energy-saving perspective, the next RACH attempt will not increase transmission power, but instead perform multiple PRACH transmissions based on the previously determined number of repetitions.

[0459] Aspect 4: When no more than M PRACH transmissions are canceled due to interference with other signals / channels / TDD band symbol directions, the UE's physical layer does not notify higher layers of the power ramping counter suspension. When more than M PRACH transmissions are power-reduced or canceled, the UE's physical layer notifies higher layers of the power ramping counter suspension. The value of M can be configured by the base station and / or determined by protocol agreement, such as a fixed value, M = N / 2, M = N-offset, etc.

[0460] In the disclosed embodiment, a power boosting mechanism under multiple PRACH transmissions is proposed, which clarifies terminal behavior and minimizes terminal energy consumption.

[0461] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0462] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0463] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution 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 relationship of a hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by 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 to implement the hardware circuit configuration 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. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0464] FIG5A is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in FIG5A , the terminal 10 may include at least one of a transceiver module 11 and a processing module 12 .

[0465] In some embodiments, the processing module 12 is used to determine whether to perform a physical random access channel PRACH transmission with N preamble code repetitions, where N is an integer greater than 1; the processing module 12 is also used to determine whether to increase the power of the PRACH retransmission based on the N preamble code repetitions.

[0466] The transceiver module 11 is configured to execute at least one of the communication steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D, but not limited thereto) such as sending and / or receiving performed by the terminal 10 in any of the above methods, which are not described in detail here. Optionally, the processing module 12 is configured to execute at least one of the other steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D, but not limited thereto) performed by the terminal 10 in any of the above methods, which are not described in detail here.

[0467] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0468] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0469] FIG5B is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in FIG5B , the network device 20 may include at least one of a transceiver module 21 and a processing module 22 .

[0470] In some embodiments, the transceiver module 21 is configured to send first information to the terminal; wherein the first information includes at least one of the following:

[0471] First indication information, where the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled;

[0472] Second indication information, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled;

[0473] Configuration information, wherein the configuration information is used to indicate a first value, and the first value is used for the terminal to determine to increase the power of PRACH retransmission when less than or equal to the first value of transmissions are canceled based on the first condition in N times of preamble code retransmission; or the first value is used for the terminal to keep the power of PRACH retransmission unchanged when more than the first value of transmissions are canceled based on the first condition in N times of preamble code retransmission.

[0474] The transceiver module 21 is configured to execute at least one of the communication steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D, but not limited thereto) performed by the network device 20 in any of the above methods, which are not described in detail here. Optionally, the processing module 22 is configured to execute at least one of the other steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D, but not limited thereto) performed by the network device 20 in any of the above methods, which are not described in detail here.

[0475] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0476] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0477] Figure 6A is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure. Communication device 8100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 8100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0478] As shown in Figure 6A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 8100 is used to perform any of the above methods. Optionally, one or more processors 8101 are used to call instructions to enable the communication device 8100 to perform any of the above methods.

[0479] In some embodiments, the communication device 8100 further includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceiver 8102 performs at least one of the communication steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D, but not limited thereto) of transmitting and / or receiving in the above method, and the processor 8101 performs at least one of the other steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D, but not limited thereto). In alternative embodiments, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, terms such as transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface can be replaced with each other, terms such as transmitter, transmitting unit, transmitter, and transmitting circuit can be replaced with each other, and terms such as receiver, receiving unit, receiver, and receiving circuit can be replaced with each other.

[0480] In some embodiments, the communication device 8100 further includes one or more memories 8103 for storing data. Alternatively, all or part of the memories 8103 may be located outside the communication device 8100. In alternative embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuits 8104 are connected to the memory 8102 and may be configured to receive data from the memory 8102 or other devices, or to send data to the memory 8102 or other devices. For example, the interface circuits 8104 may read data stored in the memory 8102 and send the data to the processor 8101.

[0481] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 6A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0482] 6B is a schematic diagram of the structure of the chip 8200 proposed in an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG6B, but the present disclosure is not limited thereto.

[0483] The chip 8200 includes one or more processors 8201. The chip 8200 is configured to execute any of the above methods.

[0484] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 8200 further includes one or more memories 8203 for storing data. Alternatively, all or part of memory 8203 may be located external to chip 8200. Optionally, interface circuit 8202 is connected to memory 8203 and may be used to receive data from memory 8203 or other devices, or may be used to send data to memory 8203 or other devices. For example, interface circuit 8202 may read data stored in memory 8203 and send the data to processor 8201.

[0485] In some embodiments, the interface circuit 8202 performs at least one of the communication steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D) of the above-described method. The interface circuit 8202 performing the communication steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D) of the above-described method, for example, means that the interface circuit 8202 performs data exchange between the processor 8201, the chip 8200, the memory 8203, or the transceiver device. In some embodiments, the processor 8201 performs at least one of the other steps (e.g., S201A, S201B-S203B, S201C-S203C, S201D-S203D, but not limited thereto).

[0486] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0487] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0488] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0489] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0490] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0491] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A power control method, characterized in that: The method is executed by a terminal, and includes: Determining to perform a physical random access channel PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1; According to the N times of repeated transmission of the preamble code, it is determined whether to increase the power of PRACH retransmission.

2. The method according to claim 1, characterized in that The determining whether to perform power boosting according to the N times of repeated transmission of the preamble code includes: Determine, according to the protocol, that at least one of the N preamble code retransmissions is not cancelled, and determine to increase the power of the PRACH retransmission; or According to the protocol, it is determined that the N times of repeated transmission of the preamble code are all cancelled, and it is determined that the power of the PRACH retransmission remains unchanged.

3. The method according to claim 1, characterized in that The determining whether to perform power boosting according to the N times of repeated transmission of the preamble code includes: Receiving first indication information sent by a network device, wherein the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in the N preamble code retransmissions is not canceled; According to the first indication information and the situation that the N preamble code repetition transmissions are cancelled, it is determined to increase the power of PRACH retransmission when at least one transmission in the N preamble code repetition transmissions is not cancelled.

4. The method according to claim 1, characterized in that The determining whether to perform power boosting according to the N times of repeated transmission of the preamble code includes: Receiving second indication information sent by a network device, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when the N preamble code retransmissions are all canceled; According to the second indication information and the situation that the N times of preamble code repetition transmission are cancelled, it is determined to keep the power of PRACH retransmission unchanged when the N times of preamble code repetition transmission are all cancelled.

5. The method according to claim 1, characterized in that The determining whether to perform power boosting according to the N times of repeated transmission of the preamble code includes: It is determined that at least one transmission in the N preamble code repetition transmissions is cancelled based on the first condition, and it is determined that the power of the PRACH retransmission remains unchanged.

6. The method according to claim 1, characterized in that The determining whether to perform power boosting according to the N times of repeated transmission of the preamble code includes: Determine that P transmissions out of the N preamble repetition transmissions are cancelled based on a first condition, and determine to increase the power of PRACH retransmissions, where P is an integer less than or equal to a first value, and the first value is an integer less than N; or Determine that Q transmissions among the N preamble code repetition transmissions are canceled based on a first condition, and determine that the power of PRACH retransmission remains unchanged, wherein Q is an integer greater than a first value, and the first value is an integer less than N.

7. The method according to claim 6, characterized in that The first value is agreed upon by a protocol or configured by the network device.

8. The method according to any one of claims 5 to 7, characterized in that The first condition includes at least one of the following: Resource conflicts; Reduction in transmission power due to power allocation; Transmission cancellation due to power allocation.

9. The method according to claim 8, characterized in that The resource conflict includes at least one of the following: Scheduled to be transmitted in the same time slot as other uplink transmissions except the preamble transmission; The interval between uplink transmissions other than the preamble transmission does not satisfy a specific condition; The time division duplex TDD frequency band overlaps in the time domain with other downlink transmissions except the preamble transmission; There is a time domain overlap between the TDD frequency band and the downlink symbol transmission except for the preamble code transmission; A half-duplex frequency division duplex HD-FDD terminal has time domain overlap with other downlink transmissions except the preamble code transmission.

10. The method according to claim 9, characterized in that The other uplink transmissions except the preamble transmission include at least one of the following: Physical uplink control channel PUCCH transmission; Physical uplink shared channel PUSCH transmission; Scheduling request SR transmission.

11. The method according to claim 9, characterized in that The other downlink transmission except the preamble transmission includes at least one of the following: Physical downlink control channel PDCCH transmission; Physical downlink shared channel PDSCH transmission; Channel state information reference signal CSI-RS transmission.

12. A power control method, characterized in that: The method is performed by a network device and includes: Sending first information to a terminal; wherein the first information includes at least one of the following: First indication information, wherein the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled; Second indication information, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled; Configuration information, wherein the configuration information is used to indicate a first value, and the first value is used by the terminal to increase the power of PRACH retransmission when P transmissions out of N preamble code repetitions are canceled based on a first condition, wherein P is less than or equal to the first value, and the first value is an integer less than N; or the first value is used by the terminal to keep the power of PRACH retransmission unchanged when Q transmissions out of N preamble code repetitions are canceled based on the first condition, wherein Q is greater than the first value, and the first value is an integer less than N.

13. The method according to claim 12, characterized in that The first condition includes at least one of the following: Resource conflicts; Reduction in transmission power due to power allocation; Transmission cancellation due to power allocation.

14. The method according to claim 13, characterized in that The resource conflict includes at least one of the following: Scheduled to be transmitted in the same time slot as other uplink transmissions except the preamble transmission; The interval between uplink transmissions other than the preamble transmission does not satisfy a specific condition; A time division duplex TDD frequency band has a time domain overlap with other downlink transmissions except the preamble code transmission; The TDD frequency band has a time domain overlap with the downlink symbol transmission except the preamble code transmission; A half-duplex frequency division duplex HD-FDD terminal has time domain overlap with other downlink transmissions except the preamble code transmission.

15. The method according to claim 14, characterized in that The other uplink transmissions except the preamble transmission include at least one of the following: PUCCH transmission; PUSCH transmission; SR transmission.

16. The method according to claim 14, characterized in that The other downlink transmission except the preamble transmission includes at least one of the following: PDCCH transmission; PDSCH transmission; CSI-RS transmission.

17. A terminal, characterized in that: include: A processing module, configured to determine to perform a physical random access channel PRACH transmission with N preamble repetition transmissions, where N is an integer greater than 1; The processing module is further used to determine whether to increase the power of PRACH retransmission according to the N times of repeated transmission of the preamble code. Rate.

18. A network device, characterized in that: include: The transceiver module is used to send first information to the terminal; wherein the first information includes at least one of the following: First indication information, wherein the first indication information is used to instruct the terminal to increase the power of PRACH retransmission when at least one transmission in N preamble code retransmissions is not canceled; Second indication information, wherein the second indication information is used to instruct the terminal to keep the power of PRACH retransmission unchanged when N preamble code retransmissions are all canceled; Configuration information, wherein the configuration information is used to indicate a first value, and the first value is used by the terminal to increase the power of PRACH retransmission when P transmissions out of N preamble code repetitions are canceled based on a first condition, wherein P is less than or equal to the first value, and the first value is an integer less than N; or the first value is used by the terminal to keep the power of PRACH retransmission unchanged when Q transmissions out of N preamble code repetitions are canceled based on the first condition, wherein Q is greater than the first value, and the first value is an integer less than N.

19. A terminal, characterized in that: include: one or more processors; A memory coupled to the processor, wherein instructions are stored in the memory, and when the instructions are executed by the processor, the terminal executes the method according to any one of claims 1 to 11.

20. A network device, characterized in that: include: one or more processors; A memory coupled to the processor, wherein instructions are stored in the memory, and when the instructions are executed by the processor, the network device executes the method according to any one of claims 12 to 16.

21. A communication system, characterized in that: The invention comprises a terminal and a network device, wherein the terminal is configured to implement the method according to any one of claims 1 to 12, and the network device is configured to implement the method according to any one of claims 12 to 16.

22. A storage medium storing instructions, characterized in that: When the instructions are executed on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 11 and 12 to 16.

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