Communication method and communication device

Abstract

Disclosed are a communication method and a communication device, the communication method comprising: determining a first transmission power according to a first time unit, the first time unit being an SBFD time unit or a non-SBFD time unit; and sending the PRACH in a first time unit by adopting the first sending power. By adopting the method and the device, a mode of determining the sending power of the PRACH after the SBFD time unit is introduced can be provided, and the receiving success rate of the PRACH is improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and communication device. Background Technology

[0002] During random access, the terminal device sends a Physical Random Access Channel (PRACH) request to the network device. This PRACH includes a preamble. The main function of the preamble is to request network access. The network device can estimate the transmission delay between itself and the terminal device based on the preamble and use this to calibrate its uplink timing.

[0003] In traditional Time Division Duplex (TDD) systems, terminal devices transmit PRACH messages on uplink time units and / or flexible time units. In the uplink time unit, the frequency domain resources allocated by the network device for the terminal device are used only for uplink transmission. In the flexible time unit, the frequency domain resources allocated by the network device for the terminal device can be used for either uplink or downlink transmission, but cannot be used for both simultaneously within a single flexible time unit. Specifically, when determining the PRACH transmission power, the terminal device only considers the time unit used for uplink transmission, such as the uplink time unit or the flexible time unit.

[0004] To improve uplink coverage and capacity and reduce communication latency, SBFD (Single-Side Frequency Division Multiplexing) was introduced in TDD systems. Specifically, SBFD allows network devices to perform both uplink and downlink transmissions simultaneously within an SBFD time unit. Network devices can configure uplink frequency domain resources for terminal devices within a downlink time unit or a flexible time unit, enabling the terminal devices to perform uplink transmissions on either the downlink or flexible time unit. A downlink or flexible time unit with this configuration is called an SBFD time unit. For example, if a network device configures uplink frequency domain resources for a first terminal device and downlink frequency domain resources for a second terminal device within the same SBFD time unit, the first terminal device can perform PRACH transmissions on that SBFD time unit, and the second terminal device can perform downlink transmissions on the same SBFD time unit. Therefore, defining the PRACH transmission power becomes a crucial issue after the introduction of the SBFD time unit. Summary of the Invention

[0005] This application provides a communication method and a communication device, which provides a way to determine the PRACH transmission power after introducing the SBFD time unit, thereby improving the PRACH reception success rate.

[0006] In a first aspect, embodiments of this application provide a communication method, the method comprising:

[0007] The first transmission power is determined based on the first time unit, which is either a sub-band full-duplex SBFD time unit or a non-SBFD time unit.

[0008] Using the first transmission power, the Physical Random Access Channel (PRACH) is transmitted in the first time unit.

[0009] By implementing the first aspect of the method, after introducing the SBFD time unit, the terminal device determines the PRACH transmission power based on whether the first time unit for transmitting PRACH is an SBFD time unit or a non-SBFD time unit. This can improve the success rate of PRACH reception when different antenna configurations are used for transmitting and receiving signals when transmitting PRACH in the SBFD time unit and when transmitting PRACH in the non-SBFD time unit.

[0010] In one possible implementation, determining the first transmission power based on the first time unit includes:

[0011] The first transmission power is determined based on the path loss;

[0012] If the first time unit is an SBFD time unit, the path loss is determined based on the first loss factor and the path loss of the downlink reference signal; the time units occupied by the downlink reference signal in the time domain include SBFD time units and / or non-SBFD time units.

[0013] Implementing this method helps to accurately determine the path loss of the downlink reference signal transmitted in the SBFD time unit.

[0014] In one possible implementation, determining the first transmission power based on the first time unit includes:

[0015] The first transmission power is determined based on the path loss;

[0016] If the first time unit is a non-SBFD time unit, the first path loss is determined based on the second loss factor and the path loss of the downlink reference signal; the time units occupied by the downlink reference signal in the time domain include SBFD time units and / or non-SBFD time units.

[0017] Implementing this method helps to accurately determine the path loss of the downlink reference signal transmitted in non-SBFD time units.

[0018] In one possible implementation, determining the first transmission power based on the first time unit includes:

[0019] The first transmission power is determined based on the path loss; the path loss is determined based on the path loss of the downlink reference signal.

[0020] If the first time unit is an SBFD time unit, then the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit.

[0021] By implementing this method, if the first time unit for transmitting PRACH is the SBFD time unit, then the path loss is determined based on the downlink reference signal occupying the SBFD time unit in the time domain, thereby improving the accuracy of path loss determination.

[0022] Determining the first transmission power based on the first time unit includes:

[0023] The first transmission power is determined based on the path loss; the path loss is determined based on the path loss of the downlink reference signal.

[0024] If the first time unit is a non-SBFD time unit, the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit.

[0025] By implementing this method, if the first time unit for transmitting PRACH is a non-SBFD time unit, the path loss is determined based on the downlink reference signal that occupies the non-SBFD time unit in the time domain, thereby improving the accuracy of path loss determination.

[0026] In one possible implementation, the method further includes:

[0027] The path loss of the downlink reference signal is determined based on the transmission power of the downlink reference signal.

[0028] If the downlink reference signal occupies an SBFD time unit in the time domain, the transmission power of the downlink reference signal is a first power; or, if the downlink reference signal occupies a non-SBFD time unit in the time domain, the transmission power of the downlink reference signal is a second power.

[0029] By implementing this method, the path loss of the downlink reference signal is determined by using either a first power or a second power, based on the time unit occupied by the downlink reference signal in the time domain, instead of using the same transmission power uniformly. Therefore, the accuracy of calculating the path loss of the downlink reference signal can be improved, which in turn can improve the accuracy of the determined PRACH transmission power.

[0030] In one possible implementation, the method further includes:

[0031] Receive first power information, which indicates the first power and the second power.

[0032] By implementing this method, network devices can indicate the first power for transmitting downlink reference signals in SBFD time units and the second power for transmitting downlink reference signals in non-SBFD time units, thereby facilitating terminal devices to determine the path loss of downlink reference signals for different types of time units and improving the accuracy of the calculated path loss.

[0033] In one possible implementation, the first power information indicates the first power and the second power, including:

[0034] The first power information includes first energy information and second energy information;

[0035] The first energy information indicates a first energy and a first offset, where the first offset is the difference between the first energy and the second energy;

[0036] The first energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a first reference signal; the second energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a second reference signal.

[0037] The second energy information indicates the third energy and the second offset, where the second offset is the difference between the third energy and the fourth energy;

[0038] The third energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the third reference signal. The fourth energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the fourth reference signal.

[0039] By implementing this method, since the network device does not need to simultaneously indicate the transmission power of the downlink reference signal when the downlink reference signal is the first reference signal and the second reference signal, but only needs to indicate an offset, the transmission power of the first reference signal and the second reference signal can be determined with reduced overhead.

[0040] In one possible implementation, the method further includes:

[0041] Based on the filtering results, the path loss of the downlink reference signal is determined;

[0042] The filtering result is obtained by filtering at least two RSRP measurement results. Each RSRP measurement result is obtained by measuring the downlink reference signal in one of at least two time units. The at least two time units are the time units occupied by the downlink reference signal in the time domain.

[0043] Implementing this method helps improve the accuracy of the calculated path loss of the downlink reference signal.

[0044] In one possible implementation, determining the first transmission power based on the first time unit includes:

[0045] The first transmit power is determined based on the target receive power; the target receive power is the PRACH receive power expected by the network device.

[0046] If the first time unit is an SBFD time unit, the target received power is the first received power; or, if the first time unit is a non-SBFD time unit, the target received power is the second received power.

[0047] By implementing this method, the first transmit power is determined based on whether the first time unit is an SBFD time unit or a non-SBFD time unit, using either the first receive power or the second receive power instead of uniformly using the same transmit power. Therefore, the accuracy of the determined PRACH transmit power can be improved.

[0048] In one possible implementation, the method further includes:

[0049] Receive second power information, which indicates the first received power and the second received power.

[0050] By implementing this method, network devices can separately indicate the expected receive power of PRACH that occupies SBFD time units in the time domain and the receive power of PRACH that occupies non-SBFD time units in the time domain. This allows terminal devices to select either the first or second receive power based on the first time unit, thereby improving the accuracy of the calculated PRACH transmit power.

[0051] In one possible implementation, the second power information indicates the first received power and the second received power, including:

[0052] The second power information includes first indication information and second indication information;

[0053] The first indication information indicates the first received power, and the second indication information indicates the second received power.

[0054] In this method, the first indication information and the second indication information respectively indicate the received power, which makes it easier for the terminal equipment to efficiently determine the first received power and the second received power.

[0055] In one possible implementation, the second power information indicates the first received power and the second received power, including:

[0056] The second power information includes first indication information and second indication information;

[0057] The first indication information indicates the relative relationship between the first received power and the second received power, and the second indication information indicates the second received power.

[0058] By implementing this method, the first indication information can indicate the relative relationship between the first received power and the second received power, and the second indication information indicates the second received power, without needing to indicate the first received power and the second received power simultaneously, thereby reducing configuration overhead.

[0059] In one possible implementation, determining the first transmission power based on the first time unit includes:

[0060] The first transmission power is determined based on the power difference; the power difference is a compensation value for the PRACH transmission power.

[0061] If the first time unit is an SBFD time unit, the power difference is a first value; or, if the first time unit is a non-SBFD time unit, the power difference is a second value.

[0062] By implementing this method, different power differences are used according to the first time unit when determining the first transmission power of PRACH, thereby improving the accuracy of the calculated PRACH transmission power.

[0063] In one possible implementation, the power difference corresponds to the first time unit and the preamble format of the PRACH.

[0064] By implementing this method, the first time unit and the preamble format of PRACH are taken into account when determining the power difference, thus improving the accuracy of the determined power difference.

[0065] In one possible implementation, the method further includes:

[0066] The first value is determined based on the second value and the first difference, the second value corresponds to the preamble format of PRACH, and the first difference is the difference between the first value and the second value.

[0067] By implementing this method, the second value is determined according to the preamble format of PRACH, and then the first value is determined according to the second value and the first difference, which can improve the efficiency of power difference acquisition.

[0068] In one possible implementation, the method further includes:

[0069] Receive third indication information, which is used to indicate the first difference.

[0070] For example, when transmitting PRACH in a non-SBFD time unit, the difference between the compensation value of PRACH transmission power and the compensation value of PRACH transmission power when transmitting PRACH in an SBFD time unit can be a fixed value, such as a first difference. This first difference is applicable to various preamble formats. In this scenario, the third indication information indicates a difference (i.e., the first difference). For example, there is a correspondence between the difference between the compensation value of PRACH transmission power when transmitting PRACH in a non-SBFD time unit and the compensation value of PRACH transmission power when transmitting PRACH in an SBFD time unit, and the preamble format. For example, the first difference can be different for different preamble formats. In this scenario, the third indication information needs to indicate the correspondence between the preamble format and the difference.

[0071] By implementing this method, network devices can be configured to calculate the difference between the compensation value of PRACH transmission power when transmitting PRACH in a non-SBFD time unit and the compensation value of PRACH transmission power when transmitting PRACH in an SBFD time unit. This makes it easier for terminal devices to determine the PRACH transmission power in the SBFD time unit and improves the accuracy of PRACH transmission power determination in the SBFD time unit with less signaling overhead.

[0072] Secondly, embodiments of this application provide a communication method, the method comprising:

[0073] Send first power information and / or second power information; the first power information indicates a first power and a second power, and the second power information indicates a first received power and a second received power.

[0074] The first power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit; the second power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is not an SBFD time unit.

[0075] The first received power is the target received power when the downlink reference signal occupies a SBFD time unit in the time domain; the second received power is the target received power when the downlink reference signal occupies a non-SBFD time unit in the time domain; the target received power is the PRACH received power expected by the network device.

[0076] In one possible implementation, the first power information indicates a first power and a second power, including: the first power information includes first energy information and second energy information;

[0077] The first energy information indicates a first energy and a first offset, where the first offset is the difference between the first energy and the second energy;

[0078] The first energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a first reference signal; the second energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a second reference signal.

[0079] The second energy information indicates the third energy and the second offset, where the second offset is the difference between the third energy and the fourth energy;

[0080] The third energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the third reference signal. The fourth energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the fourth reference signal.

[0081] In one possible implementation, the second power information indicates the first received power and the second received power, including:

[0082] The second power information includes first indication information and second indication information;

[0083] The first indication information indicates the first received power, and the second indication information indicates the second received power; or, the first indication information indicates the relative relationship between the first received power and the second received power, and the second indication information indicates the second received power.

[0084] Thirdly, embodiments of this application provide a communication device, which includes:

[0085] The determining unit is used to determine the first transmission power based on the first time unit, wherein the first time unit is a sub-band full-duplex SBFD time unit or a non-SBFD time unit;

[0086] A transmitting unit is configured to transmit PRACH in the first time unit using the first transmitting power.

[0087] Fourthly, embodiments of this application provide a communication device, which includes:

[0088] A transmitting unit is configured to transmit first power information and / or second power information; the first power information indicates a first power and a second power, and the second power information indicates a first received power and a second received power.

[0089] The first power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit; the second power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is not an SBFD time unit.

[0090] The first received power is the target received power when the downlink reference signal occupies a SBFD time unit in the time domain; the second received power is the target received power when the downlink reference signal occupies a non-SBFD time unit in the time domain; the target received power is the PRACH received power expected by the network device.

[0091] Fifthly, embodiments of this application provide a communication device including a processor and a memory interconnected thereto. The memory is used to store a computer program, and the processor is configured to execute the computer program to perform the method as described in the first aspect or any optional embodiment of the first aspect, or to perform the method as described in the second aspect or any optional embodiment of the second aspect.

[0092] In a sixth aspect, embodiments of this application provide a chip including a processor and an interface, the processor and the interface being coupled; the interface is used to receive and / or output signals, and the processor is used to execute code instructions to perform the method as described in the first aspect or any optional embodiment of the first aspect, or to perform the method as described in the second aspect or any optional embodiment of the second aspect.

[0093] In a seventh aspect, embodiments of this application provide a module device, which includes a communication module, a power module, a storage module, and a chip module, wherein: the power module is used to provide power to the module device; the storage module is used to store data and / or instructions; the communication module communicates with external devices; and the chip module is used to call the data and / or instructions stored in the storage module to execute the method as described in the first aspect or any optional embodiment of the first aspect, or to execute the method as described in the second aspect or any optional embodiment of the second aspect.

[0094] Eighthly, embodiments of this application provide a computer-readable storage medium storing a computer program, the computer program including program instructions that, when executed by a computer, implement the method as described in the first aspect or any optional embodiment of the first aspect, or implement the method as described in the second aspect or any optional embodiment of the second aspect.

[0095] Ninthly, embodiments of this application provide a computer program product, which includes a computer program or computer code, which, when run on a computer, implements the method described in the first aspect or any optional implementation of the first aspect, or implements the method described in the second aspect or any optional implementation of the second aspect.

[0096] In a tenth aspect, embodiments of this application provide a communication system, which includes a terminal device and a network device.

[0097] The beneficial effects of the technical solutions provided in the second to tenth aspects of the embodiments of this application can be referred to the beneficial effects of the technical solutions provided in the first aspect, and will not be repeated here. Attached Figure Description

[0098] Figure 1 This is a schematic diagram of the structure of a communication system provided in an embodiment of this application;

[0099] Figure 2 This is a schematic diagram of the frequency domain resource configuration of the time unit provided in the embodiments of this application;

[0100] Figure 3 This is a schematic diagram of RO located in different types of time units provided in the embodiments of this application;

[0101] Figure 4 This is a flowchart illustrating a communication method provided in an embodiment of this application;

[0102] Figure 5 This is a schematic diagram of the RO where PRACH is located and the reference signal resources provided in an embodiment of this application;

[0103] Figure 6 This is another schematic diagram of the RO where PRACH is located and the reference signal resources provided in the embodiments of this application;

[0104] Figure 7 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0105] Figure 8 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0106] Figure 9 This is a schematic diagram of the structure of another communication device provided in the embodiments of this application;

[0107] Figure 10 This is a schematic diagram of the structure of a module device provided in an embodiment of this application. Detailed Implementation

[0108] In this embodiment of the application, unless otherwise stated, the character " / " indicates that the preceding and following objects are in an OR relationship. For example, A / B can represent A or B. "AND / OR" describes the relationship between the associated objects, indicating that three relationships can exist. For example, A AND / OR B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0109] It should be noted that the terms "first" and "second" used in the embodiments of this application are used only for distinguishing descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor should they be construed as indicating or implying order.

[0110] In the embodiments of this application, "at least one" refers to one or more items, and "more than one" refers to two or more items. Furthermore, "at least one of the following" or similar expressions refer to any combination of these items, which may include any combination of a single item or a plurality of items. For example, at least one of A, B, or C can represent: A, B, C, A and B, A and C, B and C, or A, B, and C. Each of A, B, and C can be an element itself or a set containing one or more elements.

[0111] In this application, terms such as "exemplary," "in some embodiments," and "in another embodiment" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the term "exemplary" is intended to present the concept in a concrete manner.

[0112] In the embodiments of this application, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction, their meanings are consistent. Similarly, in the embodiments of this application, "communication" and "transmission" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction, their meanings are consistent. For example, transmission can include sending and / or receiving, and can be a noun or a verb.

[0113] In this embodiment of the application, "equal to" can be used with "greater than" or "less than", but not simultaneously with both. It should be noted that when "equal to" is used with "greater than", it applies to the technical solution adopted by "greater than"; when "equal to" is used with "less than", it applies to the technical solution adopted by "less than".

[0114] Please see Figure 1 , Figure 1 This is a schematic diagram of a communication system provided in an embodiment of this application. The communication system may include, but is not limited to, one or more network devices and one or more terminal devices, such as... Figure 1 Taking a network device and a terminal device as an example, where, Figure 1 In this context, network devices, such as base stations, and terminal devices, such as mobile phones, can establish wireless links with network devices for communication. Figure 1 The communication system shown includes, but is not limited to, network equipment and terminal equipment, and may also include other communication equipment. Figure 1 The number and form of the devices shown are for illustrative purposes and do not constitute a limitation on the embodiments of this application.

[0115] In this application embodiment, the terminal device is a device with wireless transceiver capabilities, which may be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, remote station, remote terminal, mobile device, wireless communication device, UE agent, or UE device, etc. The terminal device can be fixed or mobile. It should be noted that the terminal device can support at least one wireless communication technology, such as Long Term Evolution (LTE) or New Radio (NR). For example, terminal devices can be mobile phones, tablets, desktop computers, laptops, all-in-one computers, in-vehicle terminals, virtual reality (VR) terminals, augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, wearable devices, terminals in future mobile communication networks, or terminals in future evolved public land mobile networks (PLMNs), etc. In some embodiments of this application, the terminal may also be a device with transceiver functions, such as a chip system. The chip system may include a chip, and may also include other discrete components.

[0116] In this application embodiment, the network device is a device that provides wireless communication functions for terminal devices, and can also be referred to as an access network device, radio access network (RAN) device, etc. The network device can support at least one wireless communication technology, such as LTE, NR, etc. For example, the network device includes, but is not limited to: next-generation base stations (gNB) in 5th-generation (5G) mobile communication systems, base stations in 6th-generation (6G) mobile communication systems, evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home-evolved node B, or home node B, HNB), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, etc. Network devices can also be wireless controllers, centralized units (CUs), and / or distributed units (DUs) in cloud radio access network (CRAN) scenarios, or they can be relay stations, access points, vehicle-mounted devices, terminal devices, wearable devices, and network devices in future mobile communications or future evolved PLMNs. In some embodiments, network devices can also be means for providing wireless communication capabilities to terminal devices, such as chip systems. For example, a chip system may include chips, and may also include other discrete devices.

[0117] The following explanations of some terms used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0118] 1. Time Unit

[0119] Network devices and terminal devices communicate at the time unit level, or network devices schedule time-domain resources for terminal devices at the time unit level. For example, in a New Radio (NR) system, the time unit can be a radio frame, subframe, slot, mini-slot, or symbol. For example, a symbol can be an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0120] 2. SBFD time unit, non-SBFD time unit, uplink sub-band, and downlink sub-band

[0121] In this embodiment, the network device can configure frequency domain resources for uplink transmission in a downlink time unit or a flexible time unit. A downlink time unit or flexible time unit with this configuration is called an SBFD time unit. The frequency domain resources configured by the network device in the SBFD time unit for uplink transmission are called uplink subbands.

[0122] In the SBFD time unit, frequency domain resources for downlink transmission can also be configured. These downlink transmission frequency domain resources are called downlink subbands. Network devices can perform uplink and downlink transmissions simultaneously in the SBFD time unit, achieving full-duplex operation. However, a terminal device can only perform either uplink or downlink transmission in the SBFD time unit, i.e., it remains half-duplex.

[0123] like Figure 2 Figure (A) shows a schematic diagram of the SBFD time unit, illustrating the uplink sub-band configuration for the SBFD time unit. Figure 2 In the middle (A), it is identified by "U", which refers to the downlink sub-band configured for the SBFD time unit. Figure 2 In the middle (A), use “D” to indicate it.

[0124] To distinguish them from SBFD time units, non-SBFD time units can be understood as time units that have not been configured with SBFD; that is, all time units other than SBFD time units are non-SBFD time units. SBFD configuration can be understood as the network device configuring frequency domain resources for uplink transmission in downlink or flexible time units. Time units that have not been configured with SBFD can include at least one of the following: downlink time units, flexible time units, and uplink time units. Whether a time unit that has not been configured with SBFD supports uplink or downlink transmission remains unchanged due to the lack of SBFD configuration. That is, downlink time units can only support downlink transmission; uplink time units can only support uplink transmission; flexible time units can be determined by network configuration / scheduling to support either uplink or downlink transmission, but only one transmission mode is supported.

[0125] like Figure 2 Time unit 5 in (B) is a non-SBFD time unit, which is an uplink time unit, meaning it only supports uplink transmission. For example... Figure 2 Time unit 1 (B) is also a non-SBFD time unit; this non-SBFD time unit is a downlink time unit, meaning it only supports downlink transmission. For example... Figure 2 In (B), time units 2, 3, and 4 are all SBFD time units.

[0126] For example, taking time units as symbols, in this case, SBFD time units can be called SBFD symbols, and non-SBFD time units can be called non-SBFD symbols. For example, taking time units as time slots, in this case, SBFD time units can be called SBFD time slots, and non-SBFD time units can be called non-SBFD time slots.

[0127] In this application embodiment, one or more downlink sub-bands can be configured in the frequency domain of the SBFD time unit, such as... Figure 2 As shown in (A), there exists a downlink sub-band, as... Figure 2 As shown in time units 2, 3, and 4 of (B), there are two downlink sub-bands. The names of the uplink and downlink sub-bands are not limited and can be other names as well.

[0128] In this application embodiment, the guardband can be a frequency domain resource between adjacent uplink and downlink subbands to reduce transmission interference between the uplink and downlink subbands, as detailed below. Figure 2 (A) and Figure 2 The protective strip shown in (B) is labeled. The name of the protective strip is not limited and can be other names, such as protective strip. In some implementations, the protective strip may not be present; this application does not impose such a limitation.

[0129] 3. Physical Random Access Channel Occasion (PRACH occasion, RO)

[0130] RO refers to the time-frequency resources used for preamble / PRACH / random access request message transmission. RO can include time-domain resources and frequency-domain resources. Specifically, the time resource index of the time-domain resource and the frequency resource index of the frequency-domain resource of the RO can be indicated by the network. For a time-domain resource corresponding to a time-domain resource index, the number of ROs in the frequency domain can be {1, 2, 4, 8}, configured by the higher-layer parameter "msg1-FDM". After configuring the ROs, the ROs that can be used to send PRACH messages are considered valid ROs.

[0131] If the effective RO carrying PRACH occupies an SBFD time unit in the time domain, then the frequency domain resources occupied by the effective RO carrying PRACH in the frequency domain are the uplink subband corresponding to that SBFD time unit. For example... Figure 3 As shown, RO 00 RO 01 RO 10 RO 11 RO 20 RO 21 It occupies SBFD time units in the time domain and RO in the uplink subband in the frequency domain.

[0132] If the effective RO carrying PRACH occupies a non-SBFD time unit in the time domain, then the frequency domain resources occupied by that effective RO carrying PRACH in the frequency domain are the frequency domain resources corresponding to the non-SBFD time unit. These frequency domain resources corresponding to the non-SBFD time unit are used for uplink transmission; that is, all frequency domain resources of that non-SBFD time unit are used for uplink transmission. For example, ... Figure 3 As shown, this non-SBFD time unit is an uplink time unit, namely time unit 5, and the RO configured on the frequency domain resources of time unit 5 is... 30 RO 31 It is the RO that occupies a non-SBFD time unit in the time domain.

[0133] 4. Downlink Reference Signal

[0134] In this embodiment, the downlink reference signal is a signal used to measure channel state information. For example, the downlink reference signal may be a synchronization signal and physical broadcast channel block (SSB), or a channel state information-reference signal (CSI-RS).

[0135] 5. Send PRACH

[0136] After triggering a random access procedure, the terminal device can measure the Reference Signal Receiving Power (RSRP) of the downlink reference signal transmitted by the network device. Taking the downlink reference signal as the SSB as an example, the terminal device determines the SSB that meets the RSRP condition. For example, the RSRP measurement result measured by the terminal device may include: the RSRP measurement result of the terminal device is greater than a preset threshold. If there are multiple SSBs that meet the RSRP condition, one SSB is selected from them. The terminal device determines one or more ROs associated with the SSB according to the mapping relationship between SSB and RO, and transmits PRACH on the selected RO. That is, the terminal device can determine the RO resource for transmitting PRACH according to the mapping relationship between SSB and RO. In this way, after receiving the PRACH, the network device can identify the SSB selected by the terminal device, and thus transmit the random access response using the beam corresponding to the SSB selected by the terminal device.

[0137] The following example illustrates the method for determining PRACH transmission power. The PRACH transmission power satisfies the following formula:

[0138] P PRACH,b,f,c (i)=min{P cMAx,f,c (i), P PRACH target，f，c +PL b,f,c dBm (Formula 1)

[0139] Where i represents the identifier of the valid RO carrying PRACH, b represents the identifier of the bandwidth part (BWP), f is the carrier identifier, and c is the identifier of the serving cell. In other words, P... PRACH，b，f，c (i) is the PRACH transmit power of RO i carried on BWP identified as b, which is the BWP on carrier f of the serving cell with cell identifier c. cMAx,f,c (i) is the maximum transmit power of the terminal device on carrier f of the serving cell identified as c, PL b，f，cIt is the path loss on the BWP labeled b, P PRACH target，f，c This is the target receive power for the PRACH. Target receive power refers to the receive power that a network device expects to receive when it receives this PRACH.

[0140] The above path loss PL b，f，c The following formula two is satisfied:

[0141] PL b,f,c =referenceSignalPower-higher layer filtered RSRP (Formula 2)

[0142] Wherein, referenceSignalPower is the transmission power of the downlink reference signal, and higher layerfiltered RSRP is obtained by filtering multiple RSRP measurement results of the downlink reference signal measured at multiple times.

[0143] The target received power P mentioned above PRACH target，f，c The following formula three must be satisfied:

[0144] PPRACH target, f, c = preambleReceivedTargetPower

[0145] +DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER-1)*PREAMBLE_POWER_PRAMING_STEP (Formula 3)

[0146] Among them, preambleReceivedTargetPower is the target receive power of the PRACH sent by the network device during the initial random access process of the terminal device, DELTA_PREAMBLE is the power difference corresponding to different preamble formats in the PRACH, PREAMBLE_POWER_RAMPING_COUNTER is the number of power ramping steps for the target receive power value to gradually increase, and PREAMBLE_POWER_PRAMING_STEP is the power ramping step size configured by the network device for the terminal device.

[0147] After a terminal device fails in a random access procedure, it can re-initiate the procedure on the same carrier in the same cell using the same preamble. During this re-initiation, the terminal device can increase the target received power of the PRACH using a power ramping mechanism to enhance the preamble's coverage and increase the probability of successful random access. The network device configures a power ramping step size (PREAMBLE_POWER_PRAMING_STEP) for the terminal device, allowing the terminal device to increase the target received power of the PRACH by only one power ramping step at a time. This reduces interference to other communication devices caused by excessive power increases. Specifically, the terminal device can determine the number of power ramping steps to increase the target received power based on the PRACH power ramping counter value (PREAMBLE_POWER_RAMPING_COUNTER), thereby determining the target received power of the PRACH in the current random access procedure, and ultimately, the PRACH transmission power.

[0148] Table 1 shows an example of the correspondence between different long preamble formats and the value of power difference DELTA_PREAMBLE:

[0149] Preamble format The value of DELTA_PREAMBLE 0 0dB 1 -3dB 2 -6dB 3 0dB

[0150] Table 1

[0151] Table 2 shows an example of the correspondence between different short preamble formats and the power difference DELTA_PREAMBLE value, where μ is the subcarrier spacing of the carrier on which PRACH is located:

[0152] Preamble format The value of DELTA_PREAMBLE A1 8+3*μ A2 5+3*μ A3 3+3*μ B1 8+3*μ B2 5+3*μ B3 3+3*μ B4 3*μ C0 11+3*μ C2 5+3*μ

[0153] Table 2

[0154] After introducing the SBFD time unit, the terminal device can transmit PRACH in either the SBFD time unit or a non-SBFD time unit. Please refer to the foregoing explanation of terminology for a description of the SBFD and non-SBFD time units. The antenna configurations for transmitting PRACH in the SBFD time unit and the non-SBFD time unit differ, and the interference conditions also differ. Therefore, the PRACH transmission power of the terminal device in the SBFD time unit will also differ from that in the non-SBFD time unit. In this embodiment, the PRACH transmission power can be determined based on the first time unit for transmitting the PRACH, which can be either the SBFD time unit or a non-SBFD time unit. Specific embodiments are described below.

[0155] It should be noted that the various technical solutions (or embodiments) of this application can be implemented independently or in combination based on certain inherent relationships. This application does not impose any limitations. Furthermore, various terms and definitions between the embodiments can be referenced mutually. In each embodiment of this application, different implementation methods can also be implemented in combination or independently.

[0156] Please refer to Figure 4 This is a flowchart illustrating a communication method provided in an embodiment of this application, as shown below. Figure 4 As shown, the communication method of this embodiment includes, but is not limited to, the following steps:

[0157] 401. The terminal device determines the first transmission power based on the first time unit, which is either an SBFD time unit or a non-SBFD time unit.

[0158] In the embodiments of this application, the first time unit may refer to the time unit occupied by PRACH in the time domain, or the time unit for the terminal device to send PRACH, or the time unit used to transmit PRACH. Alternatively, the first time unit may refer to the time unit occupied by the effective RO used to carry PRACH in the time domain.

[0159] Taking the effective RO used to carry PRACH as an example, which occupies SBFD time units in the time domain, such as Figure 3 As shown, if PRACH is carried in RO 11 In this case, the effective RO used to carry PRACH occupies SBFD time units in the time domain. The effective RO used to carry PRACH can also occupy non-SBFD time units in the time domain, such as... Figure 3 As shown, if PRACH is carried in RO 31 The effective RO used to carry PRACH occupies a non-SBFD time unit in the time domain.

[0160] In some embodiments, when the terminal device detects a wireless link failure, or when the terminal device receives a command from the network device, the terminal device may determine a first transmission power based on a first time unit. The command from the network device may be for triggering the terminal device to perform random access.

[0161] 402. The terminal device transmits PRACH using the first transmit power in the first time unit. Correspondingly, the network device receives PRACH in the first time unit.

[0162] In other words, the terminal device can send PRACH in either the SBFD time unit or a non-SBFD time unit. The specific time unit (SBFD or non-SBFD) depends on whether the first time unit is an SBFD or non-SBFD time unit.

[0163] In this embodiment, the terminal device sending PRACH in the first time unit can also be understood as: the terminal device sending a preamble in the first time unit, or the terminal device sending a random access request message in the first time unit. Correspondingly, the network device receiving PRACH in the first time unit can also be understood as: the network device receiving a preamble in the first time unit, or the network device receiving a random access request message in the first time unit.

[0164] The following section details the specific implementation method of the terminal device determining the first transmission power based on the first time unit.

[0165] Method 1: The first transmission power is determined based on the first path loss, wherein the first time unit is an SBFD time unit. The first time unit being an SBFD time unit means that the time unit used for transmitting PRACH is an SBFD time unit.

[0166] Alternatively, the first transmit power can be determined based on the second path loss, wherein the first time unit is a non-SBFD time unit, which means that the time unit used for transmitting PRACH is a non-SBFD time unit.

[0167] In this embodiment, the first path loss is different from the second path loss. The determination methods for the first and second path losses are described below with specific examples.

[0168] Example 1: The first path loss can be determined based on a first loss factor and the path loss of the downlink reference signal. The second path loss can be determined based on a second loss factor and the path loss of the downlink reference signal.

[0169] The first loss factor is the loss factor when the time unit used for PRACH transmission is the SBFD time unit. Specifically, the first loss factor can be the offset between the first path loss and the path loss of the downlink reference signal, or the first loss factor can be the amplification factor of the first path loss relative to the path loss of the downlink reference signal, where the amplification factor can be greater than or equal to 1, or less than 1. If the first loss factor is the offset between the first path loss and the path loss of the downlink reference signal, then the first path loss = the path loss of the downlink reference signal - the first loss factor. If the first loss factor is the amplification factor of the first path loss relative to the path loss of the downlink reference signal, then the first path loss = the first loss factor * the path loss of the downlink reference signal.

[0170] The second loss factor is the loss factor when the time unit used for PRACH transmission is a non-SBFD time unit. Specifically, the second loss factor can be the offset between the second path loss and the path loss of the downlink reference signal, or the second loss factor can be the amplification factor of the second path loss relative to the path loss of the downlink reference signal, which can be greater than or equal to 1, or less than 1. If the second loss factor is the offset between the second path loss and the path loss of the downlink reference signal, then the second path loss = the path loss of the downlink reference signal - the second loss factor. If the second loss factor is the amplification factor of the second path loss relative to the path loss of the downlink reference signal, then the second path loss = the second loss factor * the path loss of the downlink reference signal.

[0171] In Example 1, the path loss of the downlink reference signal is the path loss of the downlink reference signal occupying SBFD time units and / or non-SBFD time units in the time domain.

[0172] In one implementation, the path loss of the downlink reference signal is the path loss of the downlink reference signal occupying a non-SBFD time unit in the time domain. The first path loss can be determined based on a first loss factor and the path loss of the downlink reference signal occupying the non-SBFD time unit in the time domain. In another implementation, the path loss of the downlink reference signal is the path loss of the downlink reference signal occupying an SBFD time unit in the time domain, and the second path loss can be determined based on a second loss factor and the path loss of the downlink reference signal occupying the SBFD time unit in the time domain. In yet another implementation, the path loss of the downlink reference signal is the path loss of the downlink reference signal occupying both SBFD and non-SBFD time units in the time domain. The first path loss can be determined based on a first loss factor and the path loss of the downlink reference signal, and the second path loss can be determined based on a second loss factor and the path loss of the downlink reference signal.

[0173] For example, the first loss factor and / or the second loss factor may be configured by the network device and may be carried in one of the following messages: Radio Resource Control (RRC) message, Medium Access Control (MAC) Control Element (CE), or Downlink Control Information (DCI).

[0174] Example 2: The first path loss is determined based on the path loss of the downlink reference signal, which is the path loss of the downlink reference signal occupying the SBFD time unit in the time domain.

[0175] The second path loss is determined based on the path loss of the downlink reference signal, which is the path loss of the downlink reference signal that occupies a non-SBFD time unit in the time domain.

[0176] The downlink reference signal is a reference signal sent by the network device to the terminal device in the SBFD time unit, or the downlink reference signal is a reference signal sent by the network device to the terminal device in a non-SBFD time unit.

[0177] In Examples 1 and 2 above, the following example illustrates how to calculate the path loss of the downlink reference signal. The path loss of the downlink reference signal is determined based on the transmit power and filtering results of the downlink reference signal. The filtering results are obtained by filtering at least two RSRP measurement results. Each of these at least two RSRP measurement results is obtained by measuring the downlink reference signal at each of at least two time units. These at least two time units are the time units occupied by the downlink reference signal in the time domain, and the type of the time units occupied by the downlink reference signal in the time domain is the same as the first time unit of the transmitted PRACH. The following example illustrates how the transmit power and filtering results of the downlink reference signal are determined:

[0178] The method for determining the transmission power of the downlink reference signal is as follows:

[0179] If the downlink reference signal occupies a time unit in the time domain that is an SBFD time unit, the transmission power of the downlink reference signal is the first power; if the downlink reference signal occupies a time unit in the time domain that is not an SBFD time unit, the transmission power of the downlink reference signal is the second power.

[0180] Downlink reference signals occupying SBFD time units and downlink reference signals occupying non-SBFD time units in the time domain can be different reference signals, for example, with different reference signal identifiers. Alternatively, the downlink reference signals occupying SBFD time units and downlink reference signals occupying non-SBFD time units in the time domain can also be the same reference signal transmitted in different types of time units. For example, if the downlink reference signal is a periodic signal, the downlink reference signal transmitted in the SBFD time unit is called the downlink reference signal occupying the SBFD time unit in the time domain, and the downlink reference signal transmitted in the non-SBFD time unit is called the downlink reference signal occupying the non-SBFD time unit in the time domain. Figure 5 As shown, the downlink reference signals occupying time slots 2, 6, 8, and 12 in the time domain are referred to as downlink reference signals occupying SBFD time units in the time domain, and the downlink reference signals occupying time slots 0 and 10 in the time domain are referred to as downlink reference signals occupying non-SBFD time units in the time domain.

[0181] The antenna configurations of network devices transmitting downlink reference signals in SBFD time units and non-SBFD time units are different, resulting in different antenna patterns, which may lead to different transmission powers of downlink reference signals. In the embodiments of this application, the terminal device determines the first power of the downlink reference signal occupying the SBFD time unit in the time domain (i.e., the downlink reference signal transmitted in the SBFD time unit) and the second power of the downlink reference signal occupying the non-SBFD time unit in the time domain (i.e., the downlink reference signal transmitted in the non-SBFD time unit).

[0182] The following two implementation methods illustrate how the first power and the second power are obtained:

[0183] In the first implementation, the network device indicates a first power and a second power through first power information.

[0184] For example, the first power information may include first energy information and second energy information. The first energy information is used to indicate the first power, that is, the first power is determined based on the first energy information, and the second energy information is used to indicate the second power, that is, the second power is determined based on the second energy information. The first energy information and the second energy information may reside in the same IE of the same message, or in different IEs; this application does not limit this.

[0185] In some embodiments, the first energy information may indicate a first energy and a first offset, the first offset being the difference between the first energy and the second energy.

[0186] The first energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a first reference signal (e.g., SSB), i.e., the EPRE of the first reference signal. The second energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a second reference signal (e.g., CSI-RS), i.e., the EPRE of the second reference signal.

[0187] For example, the first energy can be a newly added IE indicator, such as ss-PBCH-BlockPower-SBFD, and the first offset can be another newly added IE indicator, such as powerControlOffsetSS-SBFD. If the downlink reference signal transmitted by the network device is a first reference signal, and the downlink reference signal occupies an SBFD time unit in the time domain, the transmission power of the downlink reference signal, i.e., the first power, is determined based on the first energy. If the downlink reference signal transmitted by the network device is a second reference signal, and the downlink reference signal occupies a non-SBFD time unit in the time domain, the transmission power of the downlink reference signal, i.e., the first power, is determined based on the first energy and the first offset.

[0188] In some embodiments, the second energy information may indicate a third energy and a second offset, the second offset being the difference between the third energy and the fourth energy.

[0189] The third energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a non-SBFD time unit in the time domain and the downlink reference signal is a third reference signal (e.g., SSB), i.e., the EPRE of the third reference signal. The fourth energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a non-SBFD time unit in the time domain and the downlink reference signal is a fourth reference signal (e.g., CSI-RS), i.e., the EPRE of the fourth reference signal. In this embodiment, the third reference signal and the first reference signal may be the same or different, and the fourth reference signal and the second reference signal may be the same or different.

[0190] For example, the third energy and the second offset can be existing IE indicators, or they can be new IE indicators. Taking existing IE indicators as an example, the third energy could be the ss-PBCH-BlockPower indicator, and the second offset could be the powerControlOffsetSS indicator.

[0191] If the downlink reference signal transmitted by the network device is a third reference signal, and this downlink reference signal occupies a non-SBFD time unit in the time domain, the transmission power of the downlink reference signal, i.e., the second power, is determined based on the third energy. If the downlink reference signal transmitted by the network device is a fourth reference signal, and this downlink reference signal occupies a non-SBFD time unit in the time domain, the transmission power of the downlink reference signal, i.e., the second power, is determined based on the third energy and the second offset.

[0192] In the second implementation, the first power can be determined based on the relative relationship between the first power and the second power, and the second power is indicated by the network device through the second energy information.

[0193] The relative relationship between the first power and the second power can be the offset of the first power relative to the second power, or the relative relationship between the first power and the second power can be the amplification factor of the first power relative to the second power. The amplification factor can be greater than or equal to 1, or it can be less than 1.

[0194] For example, the relative relationship between the first power and the second power can be the amplification factor of the first power relative to the second power, where first power = variation factor * second power. Alternatively, the relative relationship can be the offset of the first power relative to the second power, where first power = second power - variation factor, or first power = second power + variation factor.

[0195] The second power can be indicated by the network device through the second energy information, and the terminal device can determine the second power based on the second energy information. For details, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0196] The relative relationship between the first power and the second power can be configured in the network device, or it can be carried in the newly added IE.

[0197] For example, the first time unit for transmitting PRACH occupies an SBFD time unit in the time domain, and the path loss of the downlink reference signal is determined based on the first power. The first time unit for transmitting PRACH occupies a non-SBFD time unit in the time domain, and the path loss of the downlink reference signal is determined based on the second power.

[0198] The method for determining the filtering result of the downlink reference signal is as follows:

[0199] For example, if the first time unit for transmitting PRACH is the SBFD time unit, then the downlink reference signal is measured in at least two SBFD time units to obtain multiple RSRP measurement results, and these multiple RSRP measurement results are then filtered to obtain a filtered result. Figure 5As shown, since the PRACH transmission time slot is time slot 13, i.e. the first time unit is the SBFD time slot, it is necessary to measure the downlink reference signal in at least two SBFD time slots to obtain multiple RSRP measurement results. For example, it is necessary to measure the RSRP measurement results of the downlink reference signal in time slots 2, 6, 8, and 12, and perform filtering based on the multiple RSRP measurement results to obtain the filtered results. Based on the filtered results, the path loss of the downlink reference signal is determined.

[0200] For example, if the first time unit for transmitting PRACH is a non-SBFD time unit, then the downlink reference signal is measured in at least two non-SBFD time units to obtain multiple RSRP measurement results. These multiple RSRP measurement results are then filtered to obtain a filtered result. Figure 6 As shown, since the PRACH transmission time slot is time slot 14, that is, the first time unit is a non-SBFD time slot, it is necessary to measure the downlink reference signal in at least two non-SBFD time slots to obtain multiple RSRP measurement results. For example, it is necessary to measure the RSRP measurement results of the downlink reference signal in time slot 0 and time slot 14, and perform filtering based on the multiple measured RSRP measurement results to obtain the filtered results. Based on the filtered results, the path loss of the downlink reference signal is determined.

[0201] It is understandable that, not only when determining the first transmit power of PRACH, it is possible to measure the downlink reference signal occupying different time unit types separately. In other scenarios, it is also necessary to measure the RSRP separately for downlink reference signals occupying different time unit types, obtain the RSRP measurement results, and set different RSRP measurement result threshold values ​​for different time unit types.

[0202] For example, in beam failure detection, a first RSRP threshold (e.g., first RSRP-ThresholdSSB) can be set for SBFD time units, and a second RSRP threshold (e.g., second RSRP-ThresholdSSB) can be set for non-SBFD time units. The RSRP measurement result of the downlink reference signal occupying the SBFD time unit in the time domain is compared with the first RSRP threshold. If the RSRP measurement result of the downlink reference signal occupying the SBFD time unit in the time domain is less than the first RSRP threshold, beam failure is determined. Similarly, the RSRP measurement result of the downlink reference signal occupying the non-SBFD time unit in the time domain is compared with the second RSRP threshold. If the RSRP measurement result of the downlink reference signal occupying the non-SBFD time unit in the time domain is less than the second RSRP threshold, beam failure is determined.

[0203] For example, in determining whether to use four-step or two-step random access, a first RSRP threshold (e.g., the first msgA-RSRP-ThresholdSSB) can be set for SBFD time units, and a second RSRP threshold (e.g., the second msgA-RSRP-ThresholdSSB) can be set for non-SBFD time units. The RSRP measurement results of downlink reference signals occupying SBFD time units in the time domain are compared with the first RSRP threshold, and the RSRP measurement results of downlink reference signals occupying non-SBFD time units in the time domain are compared with the second RSRP threshold. The four-step or two-step random access is then determined based on the comparison results.

[0204] For example, when determining whether to repeatedly transmit message 3 (i.e., msg3), a first RSRP threshold value (e.g., first rsrp-ThresholdMsg3) can be set for SBFD time units, and a second RSRP threshold value (e.g., second rsrp-ThresholdMsg3) can be set for non-SBFD time units. The RSRP measurement results of downlink reference signals occupying SBFD time units in the time domain are compared with the first RSRP threshold value, and the RSRP measurement results of downlink reference signals occupying non-SBFD time units in the time domain are compared with the second RSRP threshold value. Then, the determination of whether to repeatedly transmit message 3 is based on the comparison results.

[0205] Method 2: Determine the first transmit power based on the first target receive power, wherein the first time unit is the SBFD time unit, which means that the time unit used for transmitting PRACH is the SBFD time unit.

[0206] Alternatively, the first transmit power can be determined based on the second target receive power, where the first time unit is a non-SBFD time unit, meaning the time unit used for transmitting PRACH is a non-SBFD time unit. The target receive power is the PRACH receive power expected by the network device.

[0207] In this embodiment, the first target received power is different from the second target received power. If the first time unit for transmitting PRACH is an SBFD time unit, the first target received power is the first received power; or, if the first time unit for transmitting PRACH is a non-SBFD time unit, the second target received power is the second received power.

[0208] The first received power can be understood as the PRACH received power expected by the network device in the SBFD time unit during the random access process of the terminal device, and the second received power is the PRACH received power of the network device in the non-SBFD time unit during the random access process of the terminal device.

[0209] In one possible implementation, the first target received power and the second target received power can be the PRACH received power expected by the network device during the initial random access process of the terminal device. The target received power can be understood as the value of the parameter preambleReceivedTargetPower in Formula 3 of the aforementioned embodiments.

[0210] In this implementation, the first received power and the second received power can be indicated by the network device through second power information. The following two implementation methods illustrate how the network device indicates the first and second received power through second power information:

[0211] In the first embodiment, the network device indicates a first received power through a first indication information and a second received power through a second indication information.

[0212] The first instruction information and the second instruction information may be included in the RRC message. The first instruction information and the second instruction information may be located in different IEs or in the same IE in the RRC message. This application does not limit this.

[0213] In the second implementation, the network device indicates the relative relationship between the first received power and the second received power through the first indication information, and the second indication information indicates the second received power. The relative relationship between the first received power and the second received power can be the offset of the first received power relative to the second received power. For example, the first received power = the second received power - the variation factor, or the first received power = the second received power + the variation factor. The variation factor of the first received power relative to the second received power can be the amplification factor of the first received power relative to the second received power. The amplification factor can be greater than or equal to 1, or it can be less than 1. For example, the first received power = the second received power * the variation factor.

[0214] The first and second instruction messages can be included in the RRC message. The first instruction message can be included in the newly added IE of the RRC message.

[0215] In one possible implementation, the first target received power and the second target received power can be the PRACH received power expected by the network device during a non-initial random access procedure of the terminal device (e.g., a PRACH retransmission process). The target received power can be understood as the values ​​of parameters PRACH target, f, and c in Formula 3 of the aforementioned embodiments.

[0216] In this implementation, the first received power can be determined based on the relative relationship between the first received power and the second received power. The relative relationship between the first received power and the second received power can be the offset of the first received power relative to the second received power. For example, the first received power = the second received power - the variation factor, or the first received power = the second received power + the variation factor. The relative relationship between the first received power and the second received power can be the amplification factor of the first received power relative to the second received power. The amplification factor can be greater than or equal to 1, or it can be less than 1. For example, the first received power = the second received power * the variation factor. The second received power can be calculated based on Formula 3. For details, please refer to the description of the aforementioned embodiments.

[0217] Method 3: Determine the first transmission power based on the first power difference, wherein the first time unit is the SBFD time unit, which means that the time unit used for transmitting PRACH is the SBFD time unit.

[0218] Alternatively, the first transmit power can be determined based on the second power difference, where the first time unit is a non-SBFD time unit, meaning the time unit used for PRACH transmission is a non-SBFD time unit. The power difference is a compensation value for the PRACH transmit power.

[0219] In this embodiment, the first power difference is different from the second power difference. If the first time unit for transmitting PRACH is an SBFD time unit, the first power difference is a first value; or, if the first time unit for transmitting PRACH is a non-SBFD time unit, the second power difference is a second value.

[0220] The first value is the first power difference that needs to be compensated for in the time domain when the PRACH transmission power occupies an SBFD time unit, and the second value is the second power difference that needs to be compensated for in the time domain when the PRACH transmission power occupies a non-SBFD time unit. For example, the first value can be DELTA_PREAMBLE 1, and the second value can be DELTA_PREAMBLE 2. The first and second values ​​are related to the PRACH preamble format.

[0221] The following example illustrates how the power difference is determined:

[0222] In a first optional implementation, the power difference can be determined based on the PRACH preamble format and the first time unit of the transmitted PRACH. For example, the power difference corresponding to the PRACH preamble format and the first time unit can be determined from a first correspondence. This first correspondence is the correspondence between time unit type, preamble format, and power difference. The first correspondence can be presented in a table. Table 3 below illustrates the first correspondence as an example; it can be understood that the first correspondence can also exist in other forms. Table 3 below is merely an example:

[0223]

[0224] Table 3

[0225] The first correspondence can be specified by the protocol or configured by the network; this application does not impose any restrictions.

[0226] In this embodiment, optionally, the first correspondence can also be split into two correspondences. For example, one correspondence can be set for SBFD time units, and another correspondence can be set for non-SBFD time units. Each correspondence includes the correspondence between the preamble format and the power difference. The terminal device determines the correspondence corresponding to the first time unit based on the first time unit of PRACH transmission, and determines the power difference corresponding to the preamble format of PRACH from the correspondence.

[0227] In a second optional implementation, the second power difference that needs to be compensated for in the time domain for PRACH transmission power occupying non-SBFD time units is determined based on the format of the PRACH preamble, i.e., a second value is determined. Further, the first power difference that needs to be compensated for in the time domain for PRACH transmission power occupying SBFD time units is determined based on the second value and a first difference, i.e., a first value. The first difference is the difference between the second value and the first value.

[0228] For example, the second value can be the power difference corresponding to the preamble format of PRACH in the second correspondence, and the second correspondence is the correspondence between the preamble format and the power difference.

[0229] In this embodiment, for PRACH transmission in a non-SBFD time unit, a second correspondence is established. This second correspondence includes the correspondence between the preamble format and the power difference. For example, the second correspondence can be the correspondence shown in Table 1 or Table 2 in the aforementioned embodiments. The terminal device can find the power difference corresponding to the preamble format of the PRACH from the second correspondence as the second value. If the first time unit for transmitting the PRACH is an SBFD time unit, then it is also necessary to determine the first value based on the second value and the first difference, that is, to determine the power difference that needs to be compensated for the transmission power of the PRACH occupying the SBFD time unit in the time domain. For example, the first value = the second value - the first difference.

[0230] The first difference can be configured by the network device; for example, the network device sends a third indication message indicating the first difference. In some embodiments, the network device can configure a first difference that applies to all preamble formats. In other embodiments, the network device can configure a correspondence between preamble formats and the first difference, and the first difference can be different for different preamble formats.

[0231] In addition to determining the first transmit power of PRACH, the power difference msgA-DeltaPreamble, used to indicate the transmission power between the first transmit power of PRACH and the transmit power of msgA, can also be defined separately for different time unit types. Similarly, the power difference msg3-DeltaPreamble, used to indicate the transmission power between the first transmit power of PRACH and the transmit power of msg3, can also be defined separately for different time unit types.

[0232] Methods one through three above can be implemented separately or in combination. An example of a combined implementation is as follows: For instance, the path loss can be determined using method one, the target received power can be determined using method two, the power difference can be determined using method three, and then the first transmit power of the PRACH can be determined. The determination method can refer to Formula one of the aforementioned embodiments.

[0233] Please see Figure 7 , Figure 7 This is a schematic diagram of a communication device provided in an embodiment of this application. The communication device is applied to a terminal device. For example, the communication device can be a terminal device or a device within the terminal device, such as a chip or chip module within the terminal device, or a device that can be used in conjunction with the terminal device. Figure 7 The communication device 100 shown may include a determining unit 110 and a transmitting unit 120, wherein:

[0234] The determining unit 110 is used to determine the first transmission power based on the first time unit, wherein the first time unit is a sub-band full-duplex SBFD time unit or a non-SBFD time unit;

[0235] The transmitting unit 120 is used to transmit the Physical Random Access Channel (PRACH) on the first time unit using the first transmitting power.

[0236] In one possible implementation, the determining unit 110 is specifically used for:

[0237] The first transmission power is determined based on the path loss;

[0238] If the first time unit is an SBFD time unit, the path loss is determined based on a first loss factor and the path loss of the downlink reference signal; or, if the first time unit is a non-SBFD time unit, the path loss is determined based on a second loss factor and the path loss of the downlink reference signal.

[0239] The downlink reference signal occupies time units in the time domain including SBFD time units and / or non-SBFD time units.

[0240] In one possible implementation, the determining unit 110 is specifically used for:

[0241] The first transmission power is determined based on the path loss; the path loss is determined based on the path loss of the downlink reference signal.

[0242] If the first time unit is an SBFD time unit, the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit; or, if the first time unit is a non-SBFD time unit, the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit.

[0243] In one possible implementation, the determining unit 110 is further configured to:

[0244] The path loss of the downlink reference signal is determined based on the transmission power of the downlink reference signal.

[0245] If the downlink reference signal occupies an SBFD time unit in the time domain, the transmission power of the downlink reference signal is a first power; or, if the downlink reference signal occupies a non-SBFD time unit in the time domain, the transmission power of the downlink reference signal is a second power.

[0246] In one possible implementation, the communication device 100 further includes:

[0247] A receiving unit is configured to receive first power information, wherein the first power information indicates the first power and the second power.

[0248] In one possible implementation, the first power information indicates the first power and the second power, including:

[0249] The first power information includes first energy information and second energy information;

[0250] The first energy information indicates a first energy and a first offset, where the first offset is the difference between the first energy and the second energy;

[0251] The first energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a first reference signal; the second energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a second reference signal.

[0252] The second energy information indicates the third energy and the second offset, where the second offset is the difference between the third energy and the fourth energy;

[0253] The third energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the third reference signal. The fourth energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the fourth reference signal.

[0254] In one possible implementation, the determining unit 110 is further configured to:

[0255] Based on the filtering results, the path loss of the downlink reference signal is determined;

[0256] The filtering result is obtained by filtering at least two RSRP measurement results. Each RSRP measurement result is obtained by measuring the downlink reference signal in one of at least two time units. The at least two time units are the time units occupied by the downlink reference signal in the time domain.

[0257] In one possible implementation, the determining unit 110 is specifically used for:

[0258] The first transmit power is determined based on the target receive power; the target receive power is the PRACH receive power expected by the network device.

[0259] If the first time unit is an SBFD time unit, the target received power is the first received power; or, if the first time unit is a non-SBFD time unit, the target received power is the second received power.

[0260] In one possible implementation, the receiving unit is further configured to receive second power information, the second power information indicating the first received power and the second received power.

[0261] In one possible implementation, the second power information indicates the first received power and the second received power, including:

[0262] The second power information includes first indication information and second indication information;

[0263] The first indication information indicates the first received power, and the second indication information indicates the second received power; or, the first indication information indicates the relative relationship between the first received power and the second received power, and the second indication information indicates the second received power.

[0264] In one possible implementation, the determining unit 110 is specifically used for:

[0265] The first transmission power is determined based on the power difference; the power difference is a compensation value for the PRACH transmission power.

[0266] If the first time unit is an SBFD time unit, the power difference is a first value; or, if the first time unit is a non-SBFD time unit, the power difference is a second value.

[0267] In one possible implementation, the power difference corresponds to the first time unit and the preamble format of the PRACH.

[0268] In one possible implementation, if the first time unit is an SBFD time unit, the determining unit 110 is further configured to:

[0269] The first value is determined based on the second value and the first difference, the second value corresponds to the preamble format of PRACH, and the first difference is the difference between the second value and the first value.

[0270] about Figure 7 For a detailed description of the specific implementation, please refer to the description of the foregoing method implementation, which will not be repeated here.

[0271] Please see Figure 8 , Figure 8 This is a schematic diagram of another communication device provided in an embodiment of this application. This communication device is applied to a network device. For example, the communication device can be a network device itself, or a device within a network device, such as a chip or chip module within the network device, or a device that can be used in conjunction with a network device. Figure 8 The communication device 200 shown may include a transmitting unit 210, wherein:

[0272] Transmitting unit 210 is configured to transmit first power information and / or second power information; the first power information indicates a first power and a second power, and the second power information indicates a first received power and a second received power;

[0273] The first power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit; the second power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is not an SBFD time unit.

[0274] The first received power is the target received power when the downlink reference signal occupies a SBFD time unit in the time domain; the second received power is the target received power when the downlink reference signal occupies a non-SBFD time unit in the time domain; the target received power is the PRACH received power expected by the network device.

[0275] In one possible implementation, the first power information indicates a first power and a second power, including: the first power information includes first energy information and second energy information;

[0276] The first energy information indicates a first energy and a first offset, where the first offset is the difference between the first energy and the second energy;

[0277] The first energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a first reference signal; the second energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a second reference signal.

[0278] The second energy information indicates the third energy and the second offset, where the second offset is the difference between the third energy and the fourth energy;

[0279] The third energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the third reference signal. The fourth energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the fourth reference signal.

[0280] In one possible implementation, the second power information indicates the first received power and the second received power, including:

[0281] The second power information includes first indication information and second indication information;

[0282] The first indication information indicates the first received power, and the second indication information indicates the second received power; or, the first indication information indicates the relative relationship between the first received power and the second received power, and the second indication information indicates the second received power.

[0283] about Figure 8 For a detailed description of the specific implementation, please refer to the description of the foregoing method implementation, which will not be repeated here.

[0284] Please see Figure 9 , Figure 9 This is a schematic diagram of a communication device provided in an embodiment of this application, used to implement the functions of a terminal device in the above method embodiments, or to implement the functions of a network device in the above method embodiments. The communication device 300 can be a terminal device or a device for a terminal device. The device for a terminal device can be a chip system or a chip within the terminal device. The communication device can also be a network device or a device for a network device. The device for a network device can be a chip system or a chip within the network device. The chip system can be composed of chips, or it can include chips and other discrete components.

[0285] The communication device 300 includes at least one processor 320 for implementing the data processing functions of the terminal device or network device in the method provided in this application embodiment. The communication device 300 may also include a communication interface 310 for implementing the transmit and receive operations of the terminal device or network device in the method provided in this application embodiment. In this application embodiment, the processor 320 may be a Central Processing Unit (CPU), which may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. In this application embodiment, the communication interface 310 may be a transceiver, circuit, bus, module, or other type of communication interface for communicating with other devices via a transmission medium. For example, the communication interface 310 enables the communication device 300 to communicate with other devices. The processor 320 uses the communication interface 310 to send and receive data, and is used to implement the method described in the above method embodiments.

[0286] The communication device 300 may further include at least one memory 330 for storing program instructions and / or data. The memory 330 is coupled to the processor 320. The coupling in this embodiment is an indirect coupling or communication connection between devices, units, or modules, and may be electrical, mechanical, or other forms, used for information exchange between devices, units, or modules. The processor 320 may operate in conjunction with the memory 330. The processor 320 may execute program instructions stored in the memory 330. At least one of the at least one memories may be included in the processor.

[0287] When the communication device 300 is powered on, the processor 320 can read the software program in the memory 330, interpret and execute the instructions of the software program, and process the data of the software program. When it is necessary to transmit data wirelessly, the processor 320 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency circuit. Figure 9 (Not shown) The radio frequency (RF) circuit processes the baseband signal and then transmits the RF signal outward as electromagnetic waves through the antenna. When data is sent to the communication device 300, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 320. The processor 320 converts the baseband signal into data and processes the data.

[0288] In another implementation, the radio frequency circuitry and antenna can be set up independently of the processor 320 that performs baseband processing. For example, in a distributed scenario, the radio frequency circuitry and antenna can be arranged remotely, independent of the device.

[0289] This application embodiment does not limit the specific connection medium between the communication interface 310, processor 320, and memory 330. This application embodiment... Figure 9 The memory 330, processor 320, and communication interface 310 are connected via a bus 340. Figure 9 The connections between other components are shown in bold and are for illustrative purposes only, not as limiting information. The bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 9 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0290] When the communication device 300 is specifically used in a terminal device, such as when the communication device 300 is a chip or chip system, the communication interface 310 can output or receive baseband signals. When the communication device 300 is specifically used in a terminal device, the communication interface 310 can output or receive radio frequency signals.

[0291] It should be noted that the device can execute the relevant steps of the terminal device or network device in the foregoing method embodiments. For details, please refer to the implementation methods provided in the above steps, which will not be repeated here.

[0292] For each device or product applied to or integrated into a device, each of its modules can be implemented using hardware such as circuits. Different modules can be located in the same component (e.g., chip, circuit module, etc.) or different components within the terminal device. Alternatively, at least some modules can be implemented using software programs that run on a processor integrated within the terminal device, while the remaining (if any) modules can be implemented using hardware such as circuits.

[0293] The aforementioned memory can be volatile memory or non-volatile memory, or may include both. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which serves as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0294] This application provides a chip. The chip includes a processor, and optionally, a memory. The number of processors and the number of memories can be one or more. The processor can execute the methods shown in the above-described method embodiments and the steps performed in related implementations by reading instructions and data stored in the memory.

[0295] like Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of a module device provided in an embodiment of this application. The module device 400 can perform the relevant steps of the terminal device in the aforementioned method embodiments, or the module device 400 can perform the relevant steps of the network device in the aforementioned method embodiments.

[0296] The module device 400 includes a communication module 410, a power module 420, a storage module 430, and a chip module 440. The power module 420 provides power to the module device; the storage module 430 stores data and / or instructions; the communication module 410 communicates with external devices; and the chip module 440 retrieves the data and / or instructions stored in the storage module 430. Combined with the communication module 410, the method described in the above embodiments and the steps performed in related implementations can be executed.

[0297] This application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, which includes program instructions. When an electronic device executes the program instructions, it implements the steps performed by the terminal device in the method described in the above method embodiments, or implements the steps performed by the network device in the method described in the above method embodiments.

[0298] The computer-readable storage medium can be an internal storage unit of the terminal device or network device described in any of the foregoing embodiments, such as a hard disk or memory. The computer-readable storage medium can also be an external storage device of the terminal device or network device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the device. Further, the computer-readable storage medium can include both internal and external storage units of the terminal device or network device. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal device or network device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available media can be magnetic media (e.g., floppy disk, hard disk, magnetic tape), optical media (e.g., high-density digital video disc (DVD)), or semiconductor media. Semiconductor media can be solid-state drives (SSDs).

[0299] Regarding the modules / units included in the various devices and products described in the above embodiments, they can be software modules / units, hardware modules / units, or a combination of both. For example, for devices and products applied to or integrated into a chip, all modules / units can be implemented using hardware methods such as circuits, or at least some modules / units can be implemented using software programs that run on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits. For devices and products applied to or integrated into a chip module, all modules / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware methods such as circuits. The implementation can be done through software programs running on a processor integrated within the chip module. The remaining modules / units (if any) can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into data acquisition nodes, each module / unit can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components within the terminal device. Alternatively, at least some modules / units can be implemented through software programs running on a processor integrated within the data acquisition node, while the remaining modules / units (if any) can be implemented using hardware methods such as circuits.

[0300] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means.

[0301] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0302] In the several embodiments provided in this application, it should be understood that the disclosed methods, apparatuses, and systems can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for example, the division of units is merely a logical functional division, and other division methods may exist in actual implementation; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0303] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0304] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can be physically comprised separately, or two or more units can be integrated into one unit. The integrated unit described above can be implemented in hardware or in the form of hardware plus software functional units.

[0305] The integrated unit implemented as a software functional unit described above can be stored in a computer-readable storage medium. This software functional unit, stored in a storage medium, includes several instructions to cause a computer device (which may be a personal computer, a server, or a gateway node, etc.) to execute some steps of the methods described in the various embodiments of the present invention.

[0306] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0307] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A communication method, characterized in that, The method includes: The first transmission power is determined based on the first time unit, which is either a sub-band full-duplex SBFD time unit or a non-SBFD time unit. Using the first transmission power, the Physical Random Access Channel (PRACH) is transmitted in the first time unit.

2. The method according to claim 1, characterized in that, Determining the first transmission power based on the first time unit includes: The first transmission power is determined based on the path loss; If the first time unit is an SBFD time unit, the path loss is determined based on a first loss factor and the path loss of the downlink reference signal; or, if the first time unit is a non-SBFD time unit, the path loss is determined based on a second loss factor and the path loss of the downlink reference signal. The downlink reference signal occupies time units in the time domain including SBFD time units and / or non-SBFD time units.

3. The method according to claim 1, characterized in that, Determining the first transmission power based on the first time unit includes: The first transmission power is determined based on the path loss; the path loss is determined based on the path loss of the downlink reference signal. If the first time unit is an SBFD time unit, the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit; or, if the first time unit is a non-SBFD time unit, the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit.

4. The method according to claim 3, characterized in that, The method further includes: The path loss of the downlink reference signal is determined based on the transmission power of the downlink reference signal. If the downlink reference signal occupies an SBFD time unit in the time domain, the transmission power of the downlink reference signal is a first power; or, if the downlink reference signal occupies a non-SBFD time unit in the time domain, the transmission power of the downlink reference signal is a second power.

5. The method according to claim 4, characterized in that, The method further includes: Receive first power information, which indicates the first power and the second power.

6. The method according to claim 5, characterized in that, The first power information indicates the first power and the second power, including: The first power information includes first energy information and second energy information; The first energy information indicates a first energy and a first offset, where the first offset is the difference between the first energy and the second energy; The first energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a first reference signal; the second energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a second reference signal. The second energy information indicates the third energy and the second offset, where the second offset is the difference between the third energy and the fourth energy; The third energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the third reference signal. The fourth energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the fourth reference signal.

7. The method according to claim 2 or 3, characterized in that, The method further includes: Based on the filtering results, the path loss of the downlink reference signal is determined; The filtering result is obtained by filtering at least two RSRP measurement results. Each RSRP measurement result is obtained by measuring the downlink reference signal in one of at least two time units. The at least two time units are the time units occupied by the downlink reference signal in the time domain.

8. The method according to claim 1, characterized in that, Determining the first transmission power based on the first time unit includes: The first transmit power is determined based on the target receive power; the target receive power is the PRACH receive power expected by the network device. If the first time unit is an SBFD time unit, the target received power is the first received power; or, if the first time unit is a non-SBFD time unit, the target received power is the second received power.

9. The method according to claim 8, characterized in that, The method further includes: Receive second power information, which indicates the first received power and the second received power.

10. The method as described in claim 9, characterized in that, The second power information indicates the first received power and the second received power, including: The second power information includes first indication information and second indication information; The first indication information indicates the first received power, and the second indication information indicates the second received power; or, the first indication information indicates the relative relationship between the first received power and the second received power, and the second indication information indicates the second received power.

11. The method according to claim 1, characterized in that, Determining the first transmission power based on the first time unit includes: The first transmission power is determined based on the power difference; the power difference is a compensation value for the PRACH transmission power. If the first time unit is an SBFD time unit, the power difference is a first value; or, if the first time unit is a non-SBFD time unit, the power difference is a second value.

12. The method as described in claim 11, characterized in that, The power difference corresponds to the first time unit and the preamble format of the PRACH.

13. The method as described in claim 11, characterized in that, If the first time unit is an SBFD time unit, the method further includes: The first value is determined based on the second value and the first difference, the second value corresponds to the preamble format of PRACH, and the first difference is the difference between the second value and the first value.

14. A communication method, characterized in that, include: Send first power information and / or second power information; the first power information indicates a first power and a second power, and the second power information indicates a first received power and a second received power. The first power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit; the second power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is not an SBFD time unit. The first received power is the target received power when the downlink reference signal occupies a SBFD time unit in the time domain; the second received power is the target received power when the downlink reference signal occupies a non-SBFD time unit in the time domain; the target received power is the PRACH received power expected by the network device.

15. The method as described in claim 14, characterized in that, The first power information indicates a first power and a second power, including: the first power information includes first energy information and second energy information; The first energy information indicates a first energy and a first offset, where the first offset is the difference between the first energy and the second energy; The first energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a first reference signal; the second energy is the energy of the downlink reference signal on a resource element when the downlink reference signal occupies a time unit of SBFD in the time domain and the downlink reference signal is a second reference signal. The second energy information indicates the third energy and the second offset, where the second offset is the difference between the third energy and the fourth energy; The third energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the third reference signal. The fourth energy is the energy of the downlink reference signal on a resource element when the time unit occupied by the downlink reference signal in the time domain is a non-SBFD time unit and the downlink reference signal is the fourth reference signal.

16. The method as described in claim 14, characterized in that, The second power information indicates the first received power and the second received power, including: The second power information includes first indication information and second indication information; The first indication information indicates the first received power, and the second indication information indicates the second received power; or, the first indication information indicates the relative relationship between the first received power and the second received power, and the second indication information indicates the second received power.

17. A communication device, characterized in that, include: The determining unit is used to determine the first transmission power based on the first time unit, wherein the first time unit is a sub-band full-duplex SBFD time unit or a non-SBFD time unit; The transmitting unit is configured to transmit the Physical Random Access Channel (PRACH) on the first time unit using the first transmitting power.

18. A communication device, characterized in that, include: A transmitting unit is configured to transmit first power information and / or second power information; the first power information indicates a first power and a second power, and the second power information indicates a first received power and a second received power. The first power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is an SBFD time unit; the second power is the transmission power of the downlink reference signal when the time unit occupied by the downlink reference signal in the time domain is not an SBFD time unit. The first received power is the target received power when the downlink reference signal occupies a SBFD time unit in the time domain; the second received power is the target received power when the downlink reference signal occupies a non-SBFD time unit in the time domain; the target received power is the PRACH received power expected by the network device.

19. A communication device, characterized in that, The communication device includes a processor and a memory interconnected thereto. The memory is used to store a computer program, the computer program including program instructions. The processor invokes the program instructions to execute the method as described in any one of claims 1 to 13, or to execute the method as described in any one of claims 14 to 16.

20. A chip, characterized in that, The chip includes a processor and an interface, the processor and the interface being coupled; the interface is used to receive or output signals, and the processor is used to execute code instructions to perform the method as described in any one of claims 1 to 13, or to perform the method as described in any one of claims 14 to 16.

21. A module device, characterized in that, The module device includes a communication module, a power module, a storage module, and a chip module, wherein: The power module is used to provide electrical energy to the module device; The storage module is used to store data and / or instructions; The communication module is used to communicate with external devices; The chip module is used to call the data and / or instructions stored in the storage module, and in conjunction with the communication module, to execute the method as described in any one of claims 1 to 13, or to execute the method as described in any one of claims 14 to 16.

22. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program including program instructions that, when executed by a computer, implement the method as claimed in any one of claims 1 to 13, or implement the method as claimed in any one of claims 14 to 16.

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