CN114175755B - Power value determination method, device and system - Google Patents

Abstract

The embodiment of the application provides a power value determining method, a power value determining device and a power value determining system, which can reduce the probability of excessive back-off of the transmitting power of terminal equipment and improve the power gain so as to enhance uplink coverage. In the method, a terminal device determines a back-off value of maximum transmitting power corresponding to a first power level, the back-off value belongs to a first value set, the first value set comprises at least two values, the maximum value in the first value set is a difference value between the maximum transmitting power corresponding to the first power level and the maximum transmitting power corresponding to a second power level, the minimum value in the first value set is 0, the first power level is the current power level of the terminal device, and the second power level is a preset power level lower than the first power level; and the terminal equipment determines the maximum configuration transmitting power according to the back-off value, wherein the maximum configuration transmitting power is used for determining the transmitting power when the terminal equipment performs uplink transmission.

Description

Power value determination method, device and system

Technical Field

The present application relates to the field of communications, and in particular to a method, device and system for determining a power value.

Background technique

In the new radio (NR) system (also known as the fifth-generation (5G) system), the transmit power level of the terminal device can be divided into power class 2 (PC2) and power class 3 (PC3), where each transmit power level corresponds to a power class power P _PowerClass , which indicates the maximum transmit power of the terminal device on a certain frequency band at its corresponding power level. _The P _PowerClass corresponding to power class 2 is 26dBm, and the P _PowerClass corresponding to power class 3 is 23dBm.

Generally, in order to meet the specific absorption rate (SAR) index, terminal devices that can support PC2 need to fall back to the power level in some cases. When the power level falls back, the existing protocol stipulates that the fallback value ΔP _PowerClass of the maximum transmission power corresponding to PC2 is 3dB, that is, the terminal device falls back from PC2 to PC3.

However, when the performance of the terminal device is better, the maximum transmit power corresponding to the power level may not need to be backed off by 3dB to meet the SAR index. At this time, if the terminal device still backs off by 3dB according to the existing protocol, it will cause excessive backoff of the transmit power, thereby reducing the power gain of the terminal device and affecting the uplink coverage.

Summary of the invention

The embodiments of the present application provide a method, device and system for determining a power value, which can improve power gain and thus enhance uplink coverage.

To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

In the first aspect, a method for determining a power value and a corresponding device are provided. In this scheme, a terminal device determines a fallback value of a maximum transmit power corresponding to a first power level, the fallback value belongs to a first value set, the first value set includes at least two values, the maximum value in the first value set is the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, the minimum value in the first value set is 0, the first power level is the current power level of the terminal device, and the second power level is a preset power level lower than the first power level; the terminal device determines the maximum configured transmit power according to the fallback value, and the maximum configured transmit power is used to determine the transmit power of the terminal device when performing uplink transmission.

Based on this scheme, the terminal device determines the back-off value of the maximum transmit power corresponding to the first power level. When the terminal device does not determine the back-off value as the maximum value in the first value set, the back-off value is smaller than the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level. When the first power level is PC2 and the second power level is PC3, the back-off value is less than 3dB, so that the maximum configuration power determined by the terminal device according to the back-off value will not be too low. Therefore, the probability of excessive back-off of the transmit power can be reduced, the power gain can be improved, and the uplink coverage can be enhanced.

In one possible design, the power value determination method further includes: the terminal device sends a fallback value of the maximum transmit power corresponding to the first power level to the network device. Based on this solution, since the fallback behavior of the maximum transmit power corresponding to the power level of the terminal device may affect the configuration of certain parameters of the terminal device by the network device, the terminal device can report the fallback value to the network device so that the network device can perform subsequent configuration.

In one possible design, the terminal device determines a backoff value of the maximum transmit power corresponding to the first power level, including: if the maximum transmit power configured by the network device is less than or equal to 23dBm, the terminal device determines that the backoff value is the minimum value in the first value set.

In one possible design, the terminal device determines the maximum configured transmit power based on the backoff value, including: the terminal device determines the minimum value of the maximum configured transmit power based on the backoff value; the terminal device determines the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level and the maximum transmit power configured by the network device, or the terminal device determines the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level, the maximum transmit power configured by the network device, and the backoff value; the terminal device determines the maximum configured transmit power based on the minimum value and the maximum value.

In one possible design, the first numerical set belongs to a second numerical set, the maximum numerical value in the second numerical set is the difference between the maximum transmission power corresponding to the third power level and the maximum transmission power corresponding to the second power level, the third power level is a preset maximum power level, the third power level is greater than the first power level, and the minimum numerical value in the second numerical set is 0.

In the second aspect, a power value determination method and a corresponding device are provided. In this scheme, the communication device determines the fallback value of the maximum transmission power corresponding to the first power level according to the uplink transmission duty cycle information, the uplink transmission duty cycle information and the fallback value have a corresponding relationship, the uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value or the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle, and the first power level is the current power level of the terminal device.

Based on this scheme, the terminal device determines a back-off value of the maximum transmit power corresponding to the first power level. When the terminal device determines the back-off value to be smaller than the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, the maximum configuration power determined by the terminal device according to the back-off value will not be too low. Therefore, the probability of excessive back-off of the transmit power can be reduced, the power gain can be improved, and the uplink coverage can be enhanced.

In one possible design, the communication device is a terminal device or a network device.

In a possible design, the uplink transmission duty cycle information is a maximum uplink transmission duty cycle capability value; the corresponding relationship between the maximum uplink transmission duty cycle capability value and the backoff value is: ΔP _PowerClass =P _HP -dBm(p _HP *maximum uplink transmission duty cycle capability value). Wherein, ΔP _PowerClass is the backoff value, P _HP is the maximum transmission power corresponding to the first power level, P _Hp is the linear value of the maximum transmission power corresponding to the first power level, and dBm(X) represents the conversion of the unit of X into decibels per milliwatt, dBm.

In one possible design, the uplink transmission duty cycle information is the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle; if the ratio is less than 1, the corresponding relationship between the ratio and the backoff value is: ΔP _PowerClass = 10*ABS(log ₁₀ (maximum uplink transmission duty cycle capability value/actual uplink transmission duty cycle)); wherein ΔP _PowerClass is the backoff value, and ABS(X) represents the absolute value of X.

In one possible design, if the communication device is a terminal device, the power value determination method also includes: the terminal device determines the maximum configured transmit power based on the backoff value, and the maximum configured transmit power is used to determine the transmit power of the terminal device during uplink transmission.

In one possible design, the terminal device determines the maximum configured transmit power based on the backoff value, including: the terminal device determines the minimum value of the maximum configured transmit power based on the backoff value; the terminal device determines the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level and the maximum transmit power configured by the network device, or the terminal device determines the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level, the maximum transmit power configured by the network device, and the backoff value; the terminal device determines the maximum configured transmit power based on the minimum value and the maximum value.

In the third aspect, a method for determining a power value and a corresponding device are provided. In this scheme, when the maximum transmit power configured by the network device is less than or equal to 23dBm, the terminal device determines the backoff value of the maximum transmit power corresponding to the first power level to be 0. Based on this scheme, the terminal device determines the backoff value of the maximum transmit power corresponding to the first power level to be 0, that is, the backoff value is determined to be lower than the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, so that the maximum configured power determined by the terminal device according to the backoff value will not be too low, thereby reducing the probability of excessive backoff of the transmit power, improving the power gain and thus enhancing the uplink coverage.

In the fourth aspect, a method for determining a power value and a corresponding device are provided. In this scheme, a terminal device sends an indication message to a network device, and the indication message indicates whether the terminal device needs to perform power backoff based on a first power level. When the indication message indicates that the terminal device does not need to perform power backoff based on the first power level, the terminal device determines the backoff value of the maximum transmit power corresponding to the first power level to be 0. Based on this scheme, when the terminal device determines that it does not need to perform power backoff based on the first power level, the backoff value of the maximum transmit power corresponding to the first power level is determined to be 0, so that the maximum configuration power determined by the terminal device according to the backoff value will not be too low, thereby reducing the probability of excessive backoff of the transmit power, improving the power gain and enhancing the uplink coverage.

In a fifth aspect, a communication device is provided for implementing the various methods described above. The communication device may be a terminal device in the first aspect, the third aspect, or the fourth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; or, the communication device may be a communication device in the second aspect, or a device including the communication device, or a device included in the communication device. The communication device includes a module, unit, or means corresponding to the implementation of the above method, and the module, unit, or means may be implemented by hardware, software, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units corresponding to the above functions.

In a sixth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any of the above aspects. The communication device can be the terminal device in the above first aspect, the third aspect, or the fourth aspect, or a device including the above terminal device, or a device included in the above terminal device, such as a chip; or the communication device can be the communication device in the above second aspect, or a device including the above communication device, or a device included in the above communication device.

In the seventh aspect, a communication device is provided, comprising: a processor and an interface circuit, which may be a code/data read/write interface circuit, and which is used to receive computer execution instructions (the computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor; the processor is used to run the computer execution instructions to execute the method described in any one of the above aspects.

In an eighth aspect, a communication device is provided, comprising: a processor; the processor is used to couple with a memory, and after reading instructions in the memory, execute the method as described in any of the above aspects according to the instructions. The communication device can be the terminal device in the first aspect, the third aspect, or the fourth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; or the communication device can be the communication device in the second aspect, or a device including the communication device, or a device included in the communication device.

In a ninth aspect, a computer-readable storage medium is provided, in which instructions are stored, and when the computer-readable storage medium is executed on a communication device, the communication device can execute the method described in any one of the above aspects. The communication device can be the terminal device described in the first aspect, the third aspect, or the fourth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; or the communication device can be the communication device described in the second aspect, or a device including the communication device, or a device included in the communication device.

In a tenth aspect, a computer program product including instructions is provided, which, when executed on a communication device, enables the communication device to execute the method described in any one of the above aspects. The communication device may be the terminal device described in the first aspect, the third aspect, or the fourth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; or the communication device may be the communication device described in the second aspect, or a device including the communication device, or a device included in the communication device.

In an eleventh aspect, a communication device (for example, the communication device may be a chip or a chip system) is provided, the communication device including a processor for implementing the functions involved in any of the above aspects. In one possible design, the communication device also includes a memory for storing necessary program instructions and data. When the communication device is a chip system, it may be composed of a chip, or may include a chip and other discrete devices.

Among them, the technical effects brought about by any design method in the fifth to eleventh aspects can refer to the technical effects brought about by different design methods in the above-mentioned first aspect, second aspect, third aspect or fourth aspect, and will not be repeated here.

In a twelfth aspect, a communication system is provided, which includes a network device and a terminal device as described in the first aspect, the third aspect, or the fourth aspect.

In a thirteenth aspect, a communication system is provided. When the communication device described in the second aspect is a terminal device, the communication system includes a network device and the communication device described in the second aspect.

In a fourteenth aspect, a communication system is provided. When the communication device described in the second aspect is a network device, the communication system includes a terminal device and the communication device described in the second aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a communication system provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of a terminal device and a network device provided in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of another terminal device provided in an embodiment of the present application;

FIG4 is a schematic diagram of a flow chart of a method for determining a power value provided in an embodiment of the present application;

FIG5 is a schematic diagram of a flow chart of another method for determining a power value provided in an embodiment of the present application;

FIG6 is another schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

FIG. 7 is another schematic diagram of the structure of a network device provided in an embodiment of the present application.

Detailed ways

In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction to the relevant technologies or terms of the present application is first given as follows.

First, power level:

The transmit power level can be used to reflect the maximum transmit power capability of the terminal device at the power level, which can be reported by the terminal device to the network device with the frequency band as the granularity. In the NR system, the transmit power level of the terminal device can be divided into PC2 and PC3, and each transmit power level corresponds to a power level power, which indicates the maximum transmit power of the terminal device at its corresponding power level. Exemplarily, the maximum transmit power corresponding to each power level on different frequency bands can be shown in the following Table 1:

Table 1

Among them, dBm means decibel milliwatt, and dB means decibel.

It can be seen from Table 1 that currently PC1 has not defined the maximum transmit power on each frequency band, and PC2 only defines the maximum transmit power on some frequency bands. The tolerance indicates the allowed fluctuation value of the maximum transmit power corresponding to the power level. For example, taking the tolerance corresponding to the maximum transmit power defined by PC2 on frequency band n79 as an example, +2/-3 can indicate that the maximum transmit power corresponding to PC2 is allowed to fluctuate upward by 2dB and downward by 3dB, that is, the maximum transmit power of the terminal device can be between 23dBm and 28dBm.

Second: Power level fallback:

At present, the protocol stipulates that terminal devices that can support PC2 need to fall back to PC3 in the following situations, that is, in the following situations, the fallback value ΔP _PowerClass of the maximum transmission power corresponding to PC2 is 3dB: the maximum uplink transmission duty cycle (maxUplinkDutyCycle) capability value of the terminal device is default, and the actual uplink transmission duty cycle of the terminal device is greater than 50%; or, the terminal device reports the maximum uplink transmission duty cycle capability value of the terminal device to the network device, and the actual uplink transmission duty cycle of the terminal device is greater than the reported maximum uplink transmission duty cycle capability value; or, the maximum transmission power configured by the network device for the terminal device is less than or equal to 23dBm.

Among them, the maximum uplink transmission duty cycle capability value represents the proportion of uplink symbol transmission of the terminal device that can support PC2 when the specific absorption rate index is met. If the maximum uplink transmission duty cycle capability value of the terminal device is default, that is, the terminal device does not report the maximum uplink transmission duty cycle capability value to the network device, then the maximum uplink transmission duty cycle capability value of the terminal device is defaulted to 50%.

Among them, the specific absorption rate, or SAR value, indicates the electromagnetic radiation energy (watts) absorbed by each kilogram of human tissue, averaged over any 6 minutes. Taking mobile phone radiation as an example, SAR refers to the ratio of electromagnetic radiation absorbed by the soft tissue of the brain. The lower the SAR value, the less electromagnetic radiation is absorbed by the brain. In layman's terms, the specific absorption rate indicates the impact of electromagnetic radiation on the human body. There are currently two internationally accepted standards. One is the European standard of 2w/kg, which specifically means that, based on a 6-minute timing, the electromagnetic radiation energy absorbed by each kilogram of human tissue cannot exceed 2 watts. The other is the American standard of 1.6w/kg, which specifically means that, based on a 6-minute timing, the electromagnetic radiation energy absorbed by each kilogram of human tissue cannot exceed 1.6 watts.

Third, power control:

That is, the terminal device controls (or adjusts) the real-time transmission power of each physical channel during uplink transmission. For example, taking the physical uplink shared channel (PUSCH) as an example, the real-time transmission power of the terminal device is _{PCMAX, f, c} (i) and The smaller of two values.

Wherein, _PCMAX,f,c (i) is the maximum configured transmit power of the terminal device on the serving cell c and carrier f (referred to as the maximum configured transmit power of the terminal device in the following embodiments); _{PO_PUSCH,b,f,c} (j) is the configuration value of the target power spectral density (PSD) with the cell or terminal device as the granularity, which is configured to the terminal device through the network device; is the PUSCH resource size corresponding to the transmission opportunity i within the service cell c, carrier f, and activated uplink bandwidth part (BWP) b configured by the network device for the terminal device; PL _b,f,c (q _d ) is the downlink path loss value calculated by the terminal device through the reference signal (RS) index q _d ; f _b,f,c is the power adjustment value of the closed-loop power control sent by the network device through the transmit power control (TPC) command.

Among them, the value of the maximum configured transmit power of the terminal device is between the upper limit value _{PCMAX_H,f,c} and the lower limit value _{PCMAX_L,f,c} , that is, _{PCMAX_H,f,c} ≤PCMAX _,f,c (i)≤PCMAX_L _,f,c . In other words, the terminal device can select any value between _{PCMAX_H,f,c} and _{PCMAX_L,f,c} as the maximum configured transmit power.

The terminal device may determine the upper limit and the lower limit according to the following formula:

_{PCMAX_H,f,c} = min{ _PEMAX,c , _PPowerClass - _{ΔPPowerClass} };

_{PCMAX_L,f,c} =min{ _PEMAX,c -ΔTC _,c ,( _PPowerClass - _{ΔPPowerClass} )-max(max( _MPRc ,A- _MPRc )+ _ΔIB,c +ΔTC _,c + _ΔTRxSRS ,P- _MPRc )};

Among them, P _EMAX,c is the maximum transmit power configured for the network device; P _PowerClass is the power class power introduced above; ΔP _PowerClass is the back-off value of the maximum transmit power corresponding to the power class; ΔTC _,c is the transmit power relaxation at the edge of the band; MPR _c is the power back-off value under different bandwidths and resource block (RB) allocations under the requirements of multiple RF indicators; A-MPR _c is the attachment power back-off value, which indicates the power value that can be further backed off on the basis of MPR _c back-off under certain network signaling; _ΔIB,c is the transmit power relaxation considering inter-band carrier aggregation; _ΔTRxSRS is the gain difference between different antenna ports considered when multiple antennas send sounding reference signals (SRS) in turn; P-MPR _c is the power back-off value defined considering the achievement of the specific absorption rate.

The technical solution in the embodiment of the present application will be described below in conjunction with the drawings in the embodiment of the present application. Among them, in the description of the present application, unless otherwise specified, "/" indicates that the objects associated before and after are in an "or" relationship, for example, A/B can represent A or B; "and/or" in the present application is only a kind of association relationship describing the associated objects, indicating that there can be three relationships, for example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. And, in the description of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or its similar expression refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit the differences. At the same time, in the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

The technical solutions of the embodiments of the present application can be applied to various communication systems. For example: orthogonal frequency-division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), 5G communication system and other systems. The term "system" can be interchangeable with "network". The OFDMA system can implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA) and ultra mobile broadband (UMB). E-UTRA is an evolved version of the universal mobile telecommunications system (UMTS). The 3rd Generation Partnership Project (3GPP) in the long term evolution (LTE) and various versions based on LTE evolution are new versions using E-UTRA. The 5G communication system is the next generation communication system under study. Among them, the 5G communication system includes a non-standalone (NSA) 5G mobile communication system, an independent networking (SA) 5G mobile communication system, or a NSA 5G mobile communication system and a SA 5G mobile communication system. In addition, the communication system can also be applied to future-oriented communication technologies, and the technical solutions provided in the embodiments of the present application are applicable. The above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited to this. It is uniformly described here and will not be repeated below.

As shown in Fig. 1, a communication system 10 is provided in an embodiment of the present application. The communication system 10 includes a network device 20 and one or more terminal devices 30 connected to the network device 20. Optionally, different terminal devices 30 can communicate with each other.

Optionally, the network device 20 in the embodiment of the present application is a device that accesses the terminal device 30 to the wireless network, which may be an evolutionary base station (eNB or eNodeB) in LTE; or a base station (base transceiver station, BTS) in GSM or CDMA; or a base station (NodeB) in a WCDMA system; or a base station in a 5G network or a future evolved public land mobile network (public land mobile network, PLMN), a broadband network service gateway (BNG), a convergence switch or a non-third generation partnership project (3rd generation partnership project, 3GPP) access device, etc., and the embodiment of the present application does not specifically limit this. Optionally, the base station in the embodiment of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, etc., and the embodiment of the present application does not specifically limit this.

Optionally, the terminal device 30 in the embodiment of the present application may be a device for implementing a wireless communication function, such as a terminal or a chip that can be used in a terminal, etc. The terminal may be a user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent or a terminal device, etc. in an LTE network or a future evolved PLMN. The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The terminal may be mobile or fixed.

Optionally, the network device 20 and the terminal device 30 in the embodiment of the present application may also be referred to as a communication device, which may be a general device or a dedicated device, and the embodiment of the present application does not specifically limit this.

Optionally, as shown in FIG2 , it is a schematic diagram of the structure of a network device 20 and a terminal device 30 provided in an embodiment of the present application.

The terminal device 30 includes at least one processor (in FIG. 2, the exemplary description is made by taking a processor 301 as an example) and at least one transceiver (in FIG. 2, the exemplary description is made by taking a transceiver 303 as an example). Optionally, the terminal device 30 may also include at least one memory (in FIG. 2, the exemplary description is made by taking a memory 302 as an example), at least one output device (in FIG. 2, the exemplary description is made by taking an output device 304 as an example) and at least one input device (in FIG. 2, the exemplary description is made by taking an input device 305 as an example).

The processor 301, the memory 302 and the transceiver 303 are connected via a communication line. The communication line may include a path to transmit information between the above components.

Processor 301 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application. In a specific implementation, as an embodiment, processor 301 may also include multiple CPUs, and processor 301 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).

The memory 302 may be a device with a storage function. For example, it may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 302 may exist independently and be connected to the processor 301 through a communication line. The memory 302 may also be integrated with the processor 301.

The memory 302 is used to store computer-executable instructions for executing the solution of the present application, and the execution is controlled by the processor 301. Specifically, the processor 301 is used to execute the computer-executable instructions stored in the memory 302, thereby realizing the power value determination method described in the embodiment of the present application.

Alternatively, optionally, in an embodiment of the present application, the processor 301 may also perform processing-related functions in the power value determination method provided in the following embodiments of the present application, and the transceiver 303 is responsible for communicating with other devices or communication networks, which is not specifically limited in the embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code or computer program code, which is not specifically limited in the embodiments of the present application.

The transceiver 303 may be any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), or wireless local area networks (WLAN). The transceiver 303 includes a transmitter (Tx) and a receiver (Rx).

The output device 304 communicates with the processor 301 and can display information in a variety of ways. For example, the output device 304 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector.

The input device 305 communicates with the processor 301 and can accept user input in a variety of ways. For example, the input device 305 can be a mouse, a keyboard, a touch screen device, or a sensor device.

The network device 20 includes at least one processor (in FIG. 2, exemplarily, a processor 201 is included as an example for explanation), at least one transceiver (in FIG. 2, exemplarily, a transceiver 203 is included as an example for explanation) and at least one network interface (in FIG. 2, exemplarily, a network interface 204 is included as an example for explanation). Optionally, the network device 20 may also include at least one memory (in FIG. 2, exemplarily, a memory 202 is included as an example for explanation). Among them, the processor 201, the memory 202, the transceiver 203 and the network interface 204 are connected through a communication line. The network interface 204 is used to connect to the core network device through a link (for example, an S1 interface), or to connect to the network interface of other network devices through a wired or wireless link (for example, an X2 interface) (not shown in FIG. 2), and the embodiment of the present application does not specifically limit this. In addition, the relevant description of the processor 201, the memory 202 and the transceiver 203 can refer to the description of the processor 301, the memory 302 and the transceiver 303 in the terminal device 30, which will not be repeated here.

Combined with the structural diagram of the terminal device 30 shown in FIG2 , illustratively, FIG3 is a specific structural form of the terminal device 30 provided in an embodiment of the present application.

In some embodiments, the functions of the processor 301 in FIG. 2 may be implemented by the processor 110 in FIG. 3 .

In some embodiments, the function of the transceiver 303 in FIG. 2 may be implemented by the antenna 1 , the antenna 2 , the mobile communication module 150 , the wireless communication module 160 , etc. in FIG. 3 .

Among them, antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the terminal device 30 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization rate of the antenna. For example, antenna 1 can be reused as a diversity antenna of a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

The mobile communication module 150 can provide solutions for wireless communications including 2G/3G/4G/5G, etc., applied to the terminal device 30. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, and filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the same device as at least some of the modules of the processor 110.

The wireless communication module 160 can provide wireless communication solutions including wireless local area networks (WLAN) (such as Wi-Fi networks), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (IR), etc. applied to the terminal device 30. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signal and performs filtering, and sends the processed signal to the processor 110. The wireless communication module 160 can also receive the signal to be sent from the processor 110, modulate the frequency, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2. When the terminal device 30 is the first device, the wireless communication module 160 can provide a solution for NFC wireless communication applied to the terminal device 30, which means that the first device includes an NFC chip. The NFC chip can improve the NFC wireless communication function. When the terminal device 30 is the second device, the wireless communication module 160 can provide a solution for NFC wireless communication applied to the terminal device 30, which means that the first device includes an electronic tag (such as a radio frequency identification (RFID) tag). The NFC chip of other devices close to the electronic tag can perform NFC wireless communication with the second device.

In some embodiments, the antenna 1 of the terminal device 30 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the terminal device 30 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, or IR technology. The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (QZSS) or satellite based augmentation system (SBAS).

In some embodiments, the function of the memory 302 in FIG. 2 may be implemented by the internal memory 121 in FIG. 3 or an external memory (eg, a Micro SD card) connected to the external memory interface 120 .

In some embodiments, the function of the output device 304 in Figure 2 can be implemented by the display screen 194 in Figure 3. The display screen 194 is used to display images, videos, etc. The display screen 194 includes a display panel.

In some embodiments, the function of the input device 305 in Figure 2 can be implemented by a mouse, a keyboard, a touch screen device, or the sensor module 180 in Figure 3. Exemplarily, as shown in Figure 3, the sensor module 180 may include one or more of a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, and a bone conduction sensor 180M, which is not specifically limited in the embodiments of the present application.

In some embodiments, as shown in Figure 3, the terminal device 30 may also include one or more of an audio module 170, a camera 193, an indicator 192, a motor 191, a button 190, a SIM card interface 195, a USB interface 130, a charging management module 140, a power management module 141 and a battery 142, wherein the audio module 170 can be connected to a speaker 170A (also called a "speaker"), a receiver 170B (also called a "earpiece"), a microphone 170C (also called a "microphone", "microphone") or a headphone interface 170D, etc., and the embodiments of the present application do not specifically limit this.

It is understood that the structure shown in FIG3 does not constitute a specific limitation on the terminal device 30. For example, in other embodiments of the present application, the terminal device 30 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

In the prior art, it can be known from the above-mentioned method of determining the maximum configured transmit power of the terminal device that for the terminal device supporting PC2, on the one hand, when the _PEMAX , _c configured by the network device is less than or equal to 23dBm, the value of ΔP _{Power Class} is 3dB, and the minimum value of the maximum configured transmit power will be less than 23dBm by combining MPR _c or A-MPR _c and Δ _IB,c , ΔT _C,c and ΔT _RxSRS . If the terminal device selects the minimum value as the maximum configured transmit power, the maximum configured transmit power will be lower than 23dBm. In fact, the maximum configured transmit power of the terminal device can be 23dBm at this time, and there is no need to be lower than 23dBm. In other words, it will cause excessive backoff of the transmit power.

On the other hand, when the actual uplink transmission duty cycle is greater than the maximum uplink transmission duty cycle capability value, in order to prevent SAR from exceeding the standard, the value of ΔP _PowerClass is 3dB, but in some cases, the value of ΔP _PowerClass may not need to reach 3dB for the terminal device to meet the SAR index. For example, taking the extreme scenario of 256-order quadrature amplitude modulation (QAM) as an example, the current MPR _c is defined as 4.5-6.5dB. If MPR _c is 6.5dB and ΔP _PowerClass is 3dB, the minimum value of the maximum configured transmit power may be 16.5dBm. When the terminal device selects this minimum value as the maximum configured transmit power, the transmit power of the terminal device may be only 16.5dBm, which will also lead to excessive backoff of the transmit power.

Based on this, an embodiment of the present application provides a method for determining a power value. When the maximum transmit power P _EMAX,c configured by the network device is less than or equal to 23dBm, or when the maximum uplink transmission duty cycle capability value of the terminal device is less than the actual uplink transmission duty cycle, the terminal device determines a backoff value of the maximum transmit power corresponding to the first power level. The backoff value has at least two possible values. Among the at least two possible values, the maximum value is the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, and the minimum value is 0. The first power level is the current power level of the terminal device, and the second power level is a preset power level lower than the first power level. The terminal device determines the maximum configured transmit power based on the backoff value, and sends the backoff value to the network device.

In the power value determination method provided in the embodiment of the present application, the terminal device can also report the fallback value to the network device so that the network device can perform subsequent configuration. Optionally, the terminal device can directly report the fallback value to the network device, that is, after the terminal device determines the fallback value, it directly sends the fallback value to the network device; or, the terminal device can also indirectly report the fallback value to the network device, that is, the terminal device does not send the fallback value to the network device, but sends the maximum uplink transmission duty cycle capability value to the network device, and the network device determines the fallback value according to the maximum uplink transmission duty cycle capability value.

The specific implementation of the above solution will be described in detail in the subsequent method embodiments and will not be repeated here.

Based on the above scheme, the terminal device determines the back-off value of the maximum transmit power corresponding to the first power level. When the terminal device determines the back-off value to be smaller than the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, the maximum configuration power determined by the terminal device according to the back-off value will not be too low. Therefore, the probability of excessive back-off of the transmit power can be reduced, the power gain can be improved, and the uplink coverage can be enhanced.

The above content provides an overall description of the inventive concept of the present application. The following will be combined with Figures 1 to 3, taking the interaction between the network device 20 shown in Figure 1 and any terminal device 30 as an example to expand the power value determination method provided in the embodiment of the present application.

It should be noted that the message names between network elements or the names of parameters in the messages in the following embodiments of the present application are merely examples, and other names may be used in specific implementations, and the embodiments of the present application do not impose any specific limitations on this.

It can be understood that in the following embodiments of the present application, the terminal device determines the back-off value of the maximum transmission power corresponding to the first power level on the premise of meeting the specific absorption rate index. That is, after the terminal device performs power backoff according to the back-off value of the maximum transmission power corresponding to the first power level determined by it, the specific absorption rate index can be met.

In a possible implementation, as shown in FIG4, a power value determination method is provided in an embodiment of the present application. The power value determination method can be applied to a scenario where the maximum transmit power P _EMAX,c configured by the network device is less than or equal to 23dBm, or the maximum uplink transmission duty cycle capability value of the terminal device is less than the actual uplink transmission duty cycle. The power value determination method includes the following steps:

S401. The terminal device determines a backoff value of the maximum transmit power corresponding to a first power level.

The first power level is the current power level of the terminal device. Optionally, the first power level may be a higher level PC2 in the existing protocol, or a higher level higher than PC2 that may be defined in the future, such as PC1.

Optionally, when the terminal device determines the back-off value of the maximum transmit power corresponding to the first power level, it can select a value from the first value set as the back-off value according to its own performance (such as antenna parameters, etc.); or, when the terminal device determines the back-off value of the maximum transmit power corresponding to the first power level, if the maximum configured transmit power P _EMAX,c configured by the network device is less than or equal to 23dBm, the terminal device determines the back-off value as the minimum value in the first value set.

Among them, the first numerical set includes at least two numerical values, the maximum numerical value in the first numerical set is the difference between the maximum transmission power corresponding to the first power level and the maximum transmission power corresponding to the second power level, and the minimum numerical value in the first numerical set is 0, that is, the maximum value of the backoff value is the maximum value in the first numerical set, and the minimum value of the backoff value is the minimum value in the first numerical set.

Among them, the second power level is a preset power level lower than the first power level. Optionally, the second power level can be a power level specified by the protocol that can avoid exceeding the specific absorption rate. For example, the existing protocol believes that when the average transmission power of the terminal device exceeds 23dBm within an evaluation period, the specific absorption rate will exceed the standard. Therefore, the terminal device falls back to 23dBm to avoid this problem, so the second power level can be specified as PC3. It is understandable that as the performance of the terminal device improves, the second power level can also be a power level higher than PC3, and the embodiments of the present application do not specifically limit this.

Optionally, when the first numerical value set includes more than two numerical values, the difference between each numerical value in the first numerical value set and its previous numerical value may be equal to the same constant. For example, taking the first power level as PC2 and the second power level as PC3 as an example, if the constant is 1, the first numerical value set may be [0, 1, 2, 3]; if the constant is 0.5, the first numerical value set may be [0, 0.5, 1, 1.5, 2, 2.5, 3]. The embodiment of the present application does not specifically limit the value of the constant. It is understandable that when the first numerical value set includes two numerical values, the first numerical value set is "0, 3".

Optionally, when the first power level is not the maximum power level specified in the protocol, the protocol may specify a second value set, the maximum value in the second value set is the difference between the maximum transmit power corresponding to the third power level and the maximum transmit power corresponding to the second power level, and the second value set includes the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, and the third power level is the maximum power level specified in the protocol (which can also be understood as a preset maximum power level). In this case, the terminal device can first determine the above-mentioned first value set from the second set based on the first power level and the second power level, and then determine the fallback value of the maximum transmit power corresponding to the first power level from the first value set. That is to say, in this case, the first value set belongs to the second value set.

For example, if the first power level is PC2, the second power level is PC3, and the third power level is PC1, and the maximum transmit power corresponding to PC1 is 29dBm, then the second value set specified by the protocol can be "0, 1, 2, 3, 4, 5, 6]. At this time, the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level is 3. Therefore, the first value set determined by the terminal device from the second value set can be "0, 1, 2, 3].

S402. The terminal device determines the maximum configured transmit power according to the back-off value of the maximum transmit power corresponding to the first power.

Among them, the maximum configured transmission power is used to determine the transmission power of the terminal device during uplink transmission.

Optionally, the terminal device determines the maximum configured transmit power according to the backoff value, including:

The terminal device determines the minimum value of the maximum configuration power according to the fallback value. For detailed description, please refer to the relevant description in the brief introduction of the related technology or name of this application, which will not be repeated here;

And, the terminal device determines the maximum value of the maximum configured transmit power according to the maximum transmit power corresponding to the first power level and the maximum transmit power P _EMAX,c configured by the network device. Optionally, the maximum transmit power corresponding to the first power level and the maximum transmit power configured by the network device satisfy the following formula: P _{CMAX_H,f,c} =min{P _EMAX,c ,P _PowerClass }, that is, the terminal device can delete the fallback value when determining the maximum value of the maximum configured transmit power; or, the terminal device determines the maximum value of the maximum configured transmit power according to the maximum transmit power corresponding to the first power level, the maximum transmit power P _EMAX,c configured by the network device, and the fallback value. For detailed description, please refer to the relevant description in the brief introduction part of the relevant technology or name of this application, which will not be repeated here;

After determining the minimum value of the maximum configuration power and the maximum value of the maximum configuration power, the terminal device determines the maximum configuration power based on the maximum value and the minimum value, that is, the terminal device selects a value between the minimum value of the maximum configuration power and the maximum value of the maximum configuration power as the maximum configuration transmit power.

Optionally, after the terminal device determines the maximum configured transmit power, the transmit power of the terminal device during uplink transmission can be determined based on the maximum transmit power. Related implementations can refer to the existing technology and will not be repeated here.

S403: The terminal device sends the fallback value to the network device.

Among them, since the fallback behavior of the maximum transmission power corresponding to the power level of the terminal device may affect the configuration of certain parameters of the terminal device by the network device, the terminal device can report the fallback value to the network device so that the network device can perform subsequent configuration.

It should be noted that there is no necessary order between the above-mentioned step S402 and step S403. Step S402 may be performed first and then step S403, or step S403 may be performed first and then step S402. The embodiment of the present application does not make any specific limitation on this.

Based on this scheme, the terminal device determines the back-off value of the maximum transmit power corresponding to the first power level. When the terminal device does not determine the back-off value as the maximum value in the first value set, the back-off value is smaller than the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level. When the first power level is PC2 and the second power level is PC3, the back-off value is less than 3dB, so that the maximum configuration power determined by the terminal device according to the back-off value will not be too low. Therefore, the probability of excessive back-off of the transmit power can be reduced, the power gain can be improved, and the uplink coverage can be enhanced.

In another possible implementation, as shown in FIG5, another power value determination method provided in an embodiment of the present application, the power value determination method can be applied to a scenario where the maximum transmit power P _EMAX,c configured by the network device is less than or equal to 23dBm, or the maximum uplink transmission duty cycle capability value of the terminal device is less than the actual uplink transmission duty cycle, and the power value determination method includes the following steps:

S501. The terminal device obtains uplink transmission duty cycle information.

The uplink transmission duty cycle information may be the maximum uplink transmission duty cycle capability value of the terminal device; or, it may be the ratio of the maximum uplink transmission duty cycle capability value of the terminal device to its actual uplink transmission duty cycle.

S502. The terminal device determines a backoff value of the maximum transmit power corresponding to the first power level according to the uplink transmission duty cycle information.

There is a corresponding relationship between the uplink transmission duty cycle information and the back-off value of the maximum transmission power corresponding to the first power level.

In one possible implementation, the uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value of the terminal device, and the corresponding relationship between the maximum uplink transmission duty cycle capability value and the backoff value is ΔP _PowerClass =P _HP -dBm(p _HP *maximum uplink transmission duty cycle capability value), wherein ΔP _PowerClass is the backoff value, P _HP is the maximum transmit power corresponding to the first power level, P _HP is the linear value of the maximum transmit power corresponding to the first power level, and its unit is milliwatt mW. dBm(X) represents the conversion of the unit of X into dBm, and the specific conversion process is dBm(X) = 10log ₁₀ (X).

Optionally, in an embodiment of the present application, the minimum value of the maximum uplink transmission duty cycle capability value of the terminal device is 50%, and the maximum uplink transmission duty cycle capability value can be taken from 10% to 100% in granularity, that is, the maximum uplink transmission duty cycle capability value can be 50%, 60%, 70%, 80%, 90%, 100%. It can be seen from the corresponding relationship between the above-mentioned maximum uplink transmission duty cycle capability value and the fallback value that when the maximum uplink transmission duty cycle capability value takes different values, the fallback value also takes different values.

Exemplarily, taking the first power level as PC2 and the second power level as PC3 as an example, the linear value of the maximum transmit power of 26dBm corresponding to PC2 is 398mW, when the maximum uplink transmission duty cycle capability value is 50%, the backoff value is 26dBm-dBm(398*50%)=3dB, when the maximum uplink transmission duty cycle capability value is 60%, the backoff value is 2.2dB, and so on, when the maximum uplink transmission duty cycle capability value is 100%, the backoff value is 0. Therefore, it can be understood that the maximum value of the backoff value determined according to the corresponding relationship between the maximum uplink transmission duty cycle capability value and the backoff value is the difference between the maximum transmit power corresponding to the first power and the maximum transmit power corresponding to the second power level, and the minimum value is 0.

In another possible implementation, the uplink transmission duty cycle information is the ratio of the maximum uplink transmission duty cycle capability value of the terminal device to the actual uplink transmission duty cycle. If the ratio is less than 1, the correspondence between the ratio and the above-mentioned back-off value is: ΔP _PowerClass = 10*ABS(log ₁₀ (maximum uplink transmission duty cycle capability value/actual uplink transmission duty cycle))dB, where ΔP _PowerClass is the back-off value, and ABS(X) represents the absolute value of X.

It can be seen from the above correspondence that when the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle is different, the backoff value of the maximum transmission power corresponding to the first power level is also different. Among them, when the maximum uplink transmission duty cycle capability value is the same as the actual uplink transmission duty cycle capability value, the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle takes the maximum value of 1, and the backoff value takes the minimum value of 0; when the maximum uplink transmission duty cycle capability value takes the minimum value of 50%, and the actual uplink transmission duty cycle takes the maximum value of 100%, the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle takes the minimum value of 0.5, and the backoff value takes the maximum value of 3. Therefore, when the first power level is PC2 and the second power level is PC3, the maximum value of the backoff value determined according to the above correspondence with the backoff value is the difference between the maximum transmission power corresponding to the first power and the maximum transmission power corresponding to the second power level, and the minimum value is 0.

S503. The terminal device determines the maximum configured transmit power according to the back-off value of the maximum transmit power corresponding to the first power.

Among them, the maximum configured transmission power is used to determine the transmission power of the terminal device when performing uplink transmission. The relevant description can refer to the above step S402 and will not be repeated here.

S504: The terminal device sends a maximum uplink transmission duty cycle capability value to the network device.

Among them, the terminal device sends the maximum uplink transmission duty cycle capability value to the network device, which can also be understood as the terminal device indirectly reporting the fallback value of the maximum transmission power corresponding to the first power level to the network device.

S505. The network device determines a backoff value of the maximum transmit power corresponding to the first power level according to the uplink transmission duty cycle information.

In one possible implementation, when the uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value, the network device directly determines the backoff value based on the maximum uplink transmission duty cycle capability value reported by the terminal device in step S504, and the correspondence between the maximum uplink transmission duty cycle capability value and the backoff value. For specific instructions, please refer to the relevant description in the above step S502, which will not be repeated here.

In another possible implementation, when the uplink transmission duty cycle information is the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle, since the uplink transmission of the terminal device is scheduled by the network device, the network device can determine the actual uplink transmission duty cycle of the terminal device, and determine the uplink transmission duty cycle information in combination with the maximum uplink transmission duty cycle capability value reported by the terminal device in step S504, and then determine the backoff value based on the correspondence between the uplink transmission duty cycle information and the backoff value. For specific instructions, please refer to the relevant description in the above step S502, which will not be repeated here.

It should be noted that there is no necessary order between the above-mentioned step S502 and step S504. Step S502 may be executed first and then step S504, or step S504 may be executed first and then step S502. The embodiment of the present application does not make any specific limitation on this.

Based on this scheme, the terminal device determines a back-off value of the maximum transmit power corresponding to the first power level. When the terminal device determines the back-off value to be smaller than the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, the maximum configuration power determined by the terminal device according to the back-off value will not be too low. Therefore, the probability of excessive back-off of the transmit power can be reduced, the power gain can be improved, and the uplink coverage can be enhanced.

In another possible implementation, when the maximum transmit power P _EMAX,c configured by the network device is less than or equal to 23dBm, the terminal device may determine the backoff value of the maximum transmit power corresponding to the first power level to be 0. At this time, the terminal device does not need to send the backoff value to the network device. The network device can also determine the backoff value of the maximum transmit power corresponding to the first power level to be 0 based on the maximum transmit power configured by it, and then perform subsequent configuration based on the backoff value 0. Based on this scheme, the terminal device determines the backoff value of the maximum transmit power corresponding to the first power level to be 0, that is, determines the backoff value to be lower than the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, so that the maximum configured power determined by the terminal device according to the backoff value will not be too low, thereby reducing the probability of excessive backoff of the transmit power, improving the power gain and thus enhancing the uplink coverage.

In another possible implementation, the terminal device may notify the network device through indication information whether it needs to perform power backoff based on the first power level. When the indication information indicates that the terminal device needs to perform power backoff based on the first power level, the terminal device and the network device both determine the backoff value of the maximum transmit power corresponding to the first power level as the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level. When the indication information indicates that the terminal device does not need to perform power backoff based on the first power level, the terminal device and the network device determine the backoff value of the maximum transmit power corresponding to the first power level to be 0.

Optionally, the indication information may be represented by a flag bit, and when the flag bit is "supported", it indicates that the terminal device needs to perform power backoff based on the first power level; conversely, when the flag bit is the default value, it indicates that the terminal device does not need to perform power backoff based on the first power level; or, when the flag bit is "supported", it indicates that the terminal device does not need to perform power backoff based on the first power level; conversely, when the flag bit is the default value, it indicates that the terminal device needs to perform power backoff based on the first power level.

Based on this scheme, when the terminal device determines that there is no need to perform power backoff based on the first power level, the backoff value of the maximum transmit power corresponding to the first power level is determined to be 0, so that the maximum configuration power determined by the terminal device based on the backoff value will not be too low, thereby reducing the probability of excessive transmit power backoff, increasing power gain and enhancing uplink coverage.

It can be understood that in the above embodiments, the methods and/or steps implemented by the terminal device can also be implemented by components (such as chips or circuits) that can be used for the terminal device, and the methods and/or steps implemented by the network device can also be implemented by components that can be used for the network device.

The above mainly introduces the scheme provided by the embodiment of the present application from the perspective of interaction between various network elements. Accordingly, the embodiment of the present application also provides a communication device, which is used to implement the above various methods. The communication device can be a terminal device in the above method embodiment, or a device including the above terminal device, or a component that can be used for a terminal device; or, the communication device can be a network device in the above method embodiment, or a device including the above network device, or a component that can be used for a network device. It can be understood that in order to implement the above functions, the communication device includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

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

For example, the communication device is taken as the terminal device in the above method embodiment. FIG6 shows a schematic diagram of the structure of a terminal device 60. The terminal device 60 includes a processing module 601. Optionally, the terminal device 60 may also include a transceiver module 602. The transceiver module 602 may also be referred to as a transceiver unit for implementing a sending and/or receiving function, and may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.

Among them, the transceiver module 602 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the terminal device in the above method embodiment, and the processing module 601 may be used to execute other steps except the receiving and sending steps performed by the terminal device in the above method embodiment.

For example, in one possible implementation, the processing module 601 is used to determine a backoff value of a maximum transmit power corresponding to a first power level, the backoff value belongs to a first value set, the first value set includes at least two values, the maximum value in the first value set is the difference between the maximum transmit power corresponding to the first power level and the maximum transmit power corresponding to the second power level, the minimum value in the first value set is 0, the first power level is the current power level of the terminal device, and the second power level is a preset power level lower than the first power level; the processing module 601 is also used to determine the maximum configured transmit power based on the backoff value, and the maximum configured transmit power is used to determine the transmit power of the terminal device during uplink transmission.

Optionally, the transceiver module 602 is used to send a back-off value of the maximum transmit power corresponding to the first power level to the network device.

Optionally, processing module 601 is used to determine the backoff value of the maximum transmit power corresponding to the first power level, including: if the maximum transmit power configured by the network device is less than or equal to 23dBm, processing module 601 is used to determine that the backoff value is the minimum value in the first value set.

Optionally, the processing module 601 is also used to determine the maximum configured transmit power based on the backoff value, including: the processing module 601 is also used to determine the minimum value of the maximum configured transmit power based on the backoff value; the processing module 601 is also used to determine the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level and the maximum transmit power configured by the network device, or the processing module 601 is also used to determine the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level, the maximum transmit power configured by the network device, and the backoff value; the processing module 601 is also used to determine the maximum value of the maximum configured transmit power based on the minimum value and the maximum value.

In another possible implementation, the processing module 601 is used to determine the backoff value of the maximum transmission power corresponding to the first power level based on the uplink transmission duty cycle information, and there is a corresponding relationship between the uplink transmission duty cycle information and the backoff value. The uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value or the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle.

Optionally, the processing module 601 is further used to determine the maximum configured transmit power according to the back-off value, and the maximum configured transmit power is used to determine the transmit power of the terminal device during uplink transmission.

Optionally, the processing module 601 is also used to determine the maximum configured transmit power based on the backoff value, including: the processing module 601 is also used to determine the minimum value of the maximum configured transmit power based on the backoff value; the processing module 601 is also used to determine the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level and the maximum transmit power configured by the network device, or the processing module 601 is also used to determine the maximum value of the maximum configured transmit power based on the maximum transmit power corresponding to the first power level, the maximum transmit power configured by the network device, and the backoff value; the processing module 601 is also used to determine the maximum value of the maximum configured transmit power based on the minimum value and the maximum value.

Optionally, the transceiver module 602 is used to send the maximum uplink transmission duty cycle capability value to the network device.

Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here.

In this embodiment, the terminal device 60 is presented in the form of dividing each functional module in an integrated manner. Here, the "module" may refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the terminal device 60 can take the form of the terminal device 30 shown in Figure 2.

For example, the processor 301 in the terminal device 30 shown in FIG. 2 may call the computer execution instructions stored in the memory 302 so that the terminal device 30 executes the power value determination method in the above method embodiment.

Specifically, the functions/implementation processes of the processing module 601 and the transceiver module 602 in FIG6 can be implemented by the processor 301 in the terminal device 30 shown in FIG2 calling the computer execution instructions stored in the memory 302. Alternatively, the functions/implementation processes of the processing module 601 in FIG6 can be implemented by the processor 301 in the terminal device 30 shown in FIG2 calling the computer execution instructions stored in the memory 302, and the functions/implementation processes of the transceiver module 602 in FIG6 can be implemented by the transceiver 303 in the terminal device 30 shown in FIG2.

Since the terminal device 60 provided in this embodiment can execute the above-mentioned power value determination method, the technical effects that can be obtained can refer to the above-mentioned method embodiment and will not be repeated here.

Or, for example, the communication device is a network device in the above method embodiment. FIG. 7 shows a schematic diagram of the structure of a network device 70. The network device 70 includes a processing module 701. Optionally, the network device 70 may also include a transceiver module 702. The transceiver module 702 may also be referred to as a transceiver unit for implementing a sending and/or receiving function, and may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.

Among them, the transceiver module 702 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the network device in the above method embodiment, and the processing module 701 may be used to execute other steps except the receiving and sending steps performed by the network device in the above method embodiment.

For example, processing module 701 is used to determine the backoff value of the maximum transmission power corresponding to the first power level based on the uplink transmission duty cycle information, and there is a corresponding relationship between the uplink transmission duty cycle information and the backoff value. The uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value or the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle.

Optionally, the transceiver module 702 is used to receive a maximum uplink transmission duty cycle capability value from a terminal device.

Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here.

In this embodiment, the network device 70 is presented in the form of dividing various functional modules in an integrated manner. The "module" here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can imagine that the network device 70 can take the form of the network device 20 shown in Figure 2.

For example, the processor 201 in the network device 20 shown in FIG. 2 may call the computer execution instructions stored in the memory 202 so that the network device 20 executes the power value determination method in the above method embodiment.

Specifically, the functions/implementation processes of the processing module 701 and the transceiver module 702 in FIG7 can be implemented by the processor 201 in the network device 20 shown in FIG2 calling the computer execution instructions stored in the memory 202. Alternatively, the functions/implementation processes of the processing module 701 in FIG7 can be implemented by the processor 201 in the network device 20 shown in FIG2 calling the computer execution instructions stored in the memory 202, and the functions/implementation processes of the transceiver module 702 in FIG7 can be implemented by the transceiver 203 in the network device 20 shown in FIG2.

Since the network device 70 provided in this embodiment can execute the above-mentioned power value determination method, the technical effects that can be obtained can refer to the above-mentioned method embodiment and will not be repeated here.

Optionally, an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), the communication device including a processor for implementing the method in any of the above method embodiments. In one possible design, the communication device also includes a memory. The memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the above method embodiments. Of course, the memory may not be in the communication device. In another possible design, the communication device also includes an interface circuit, which is a code/data read/write interface circuit, which is used to receive computer execution instructions (computer execution instructions are stored in the memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor. When the communication device is a chip system, it can be composed of a chip, or it can include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may 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 servers that can be integrated with a medium. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc. In the embodiment of the present application, the computer may include the device described above.

Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (9)

1. A method for determining a power value, characterized in that the method comprises: The communication device determines a fallback value of the maximum transmit power corresponding to the first power level according to the uplink transmission duty cycle information, the uplink transmission duty cycle information and the fallback value have a corresponding relationship, the uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value or the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle, and the first power level is the current power level of the terminal device; If the communication device is the terminal device, the terminal device determines a minimum value of the maximum configured transmit power according to the backoff value; the maximum configured transmit power is used to determine the transmit power of the terminal device when performing uplink transmission; The terminal device determines the maximum value of the maximum configured transmit power according to the maximum transmit power corresponding to the first power level and the maximum transmit power configured by the network device, or the terminal device determines the maximum value of the maximum configured transmit power according to the maximum transmit power corresponding to the first power level, the maximum transmit power configured by the network device, and the backoff value; The terminal device determines the maximum configured transmit power based on the minimum value and the maximum value. 2. The method according to claim 1, characterized in that the uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value; the corresponding relationship between the maximum uplink transmission duty cycle capability value and the fallback value is: ΔP _PowerClass =P _HP -dBm (p _HP * maximum uplink transmission duty cycle capability value); Among them, ΔP _PowerClass is the back-off value, P _HP is the maximum transmit power corresponding to the first power class, p _HP is the linear value of the maximum transmit power corresponding to the first power class, and dBm(X) represents the conversion of the unit of X into decibel milliwatt dBm. 3. The method according to claim 1, characterized in that the uplink transmission duty cycle information is a ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle; If the ratio is less than 1, the corresponding relationship between the ratio and the backoff value is: ΔP _PowerClass = 10*ABS (log ₁₀ (maximum uplink transmission duty cycle capability value/actual uplink transmission duty cycle)); Wherein, ΔP _PowerClass is the fallback value, and ABS(X) represents the absolute value of X. 4. A communication device, characterized in that the communication device comprises: a processing module; The processing module is used to determine the fallback value of the maximum transmit power corresponding to the first power level according to the uplink transmission duty cycle information, the uplink transmission duty cycle information and the fallback value have a corresponding relationship, the uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value or the ratio of the maximum uplink transmission duty cycle capability value to the actual uplink transmission duty cycle, and the first power level is the current power level of the terminal device; If the communication device is the terminal device, the processing module is further used to determine the minimum value of the maximum configured transmit power according to the backoff value; the maximum configured transmit power is used to determine the transmit power of the terminal device when performing uplink transmission; The processing module is further used to determine the maximum value of the maximum configured transmit power according to the maximum transmit power corresponding to the first power level and the maximum transmit power configured by the network device, or the processing module is further used to determine the maximum value of the maximum configured transmit power according to the maximum transmit power corresponding to the first power level, the maximum transmit power configured by the network device, and the backoff value; The processing module is further used to determine the maximum configured transmit power according to the minimum value and the maximum value. 5. The communication device according to claim 4, characterized in that the uplink transmission duty cycle information is the maximum uplink transmission duty cycle capability value; the corresponding relationship between the maximum uplink transmission duty cycle capability value and the fallback value is: ΔP _PowerClass =P _HP -dBm (p _HP * maximum uplink transmission duty cycle capability value); Among them, ΔP _PowerClass is the back-off value, P _HP is the maximum transmit power corresponding to the first power class, p _HP is the linear value of the maximum transmit power corresponding to the first power class, and dBm(X) represents the conversion of the unit of X into decibel milliwatt dBm. 6. The communication device according to claim 4, characterized in that the uplink transmission duty cycle information is a ratio of the maximum uplink transmission duty cycle capability value to an actual uplink transmission duty cycle; If the ratio is less than 1, the corresponding relationship between the ratio and the backoff value is: ΔP _PowerClass = 10*ABS (log ₁₀ (maximum uplink transmission duty cycle capability value/actual uplink transmission duty cycle)); Wherein, ΔP _PowerClass is the fallback value, and ABS(X) represents the absolute value of X. 7. A communication device, characterized in that the communication device comprises: a processor and a memory; The memory is used to store computer-executable instructions. When the processor executes the computer-executable instructions, the communication device executes the method according to any one of claims 1 to 3. 8. A communication device, characterized in that the communication device comprises: a processor and an interface circuit; The interface circuit is used to receive computer execution instructions and transmit them to the processor; The processor is configured to execute the computer-executable instructions so as to enable the communication device to perform the method according to any one of claims 1 to 3. 9. A computer-readable storage medium, characterized by comprising instructions, which, when executed on a communication device, enable the communication device to execute the method according to any one of claims 1 to 3.