CN112867129B - Power headroom report sending method and device - Google Patents

Abstract

The application discloses a power headroom report sending method and device, which relate to the field of communication and are used for realizing that network equipment can reversely push out an MPR/P-MPR value according to PHR reported by terminal equipment in an FR2 scene. The power headroom reporting and sending method comprises the following steps: obtaining second indication information according to one of the correction value of the maximum output power back-off MPR and the power management maximum output power back-off P-MPR and the first indication information, wherein the first indication information is used for indicating the preset transmitting power of the terminal equipment, the second indication information is used for indicating the maximum transmitting power of the terminal equipment, and the terminal equipment works in a frequency range 2; and reporting PHR by sending power headroom, wherein the PHR comprises second indication information and third indication information, and the third indication information is used for indicating that the second indication information is obtained by the correction value of the MPR and the first indication information or indicating that the second indication information is obtained by the P-MPR and the first indication information.

Description

Power headroom reporting and sending method and device

Technical Field

The present application relates to the field of communications, and in particular to a method and device for reporting and sending power headroom.

Background Art

When terminal devices send and receive data wirelessly, the electromagnetic field will generate ionizing radiation to the human body. Various national agencies, such as the Federal Communications Commission (FCC) and the International Commission on Non-ionizing Radiation Protection (ICNIRP), will impose restrictions on radio frequency radiation from terminal devices to prevent ionizing radiation generated by terminal devices from causing harm to the human body.

The fifth generation (5G) communication protocol includes two frequency ranges (FR): FR1 and FR2. FR1 (also known as Sub6G) refers to the frequency range below 6 GHz, and FR2 (also known as millimeter wave (mmW)) refers to the frequency range above 6 GHz.

Generally speaking, for terminal devices working in FR1, the specific absorption rate (SAR) is used to evaluate the impact of ionizing radiation on the human body. For terminal devices working in FR2, due to the higher frequency of electromagnetic waves and the poor penetration of electromagnetic waves, the maximum permissible exposure (MPE) is generally used to evaluate the impact of ionizing radiation on the human body.

In wireless communication systems (such as 5G communication systems), in order to prevent the ionizing radiation generated by terminal devices from being too large and exceeding the regulatory requirements of various countries, power management maximum output power reduction (MPR) (i.e., P-MPR) is used to limit the maximum transmit power of terminal devices, thereby reducing the SAR or MPE of terminal devices to meet regulatory requirements. The larger the P-MPR, the smaller the maximum transmit power of the terminal device.

P-MPR is controlled by the terminal device itself. If a larger P-MPR is set, it may cause radio link failure, and the terminal device needs to perform radio resource control (RRC) reconstruction and other processes. When the terminal device works in FR2, the frequency of radio link failure will be more serious. For this reason, the R16 protocol is considering enhancing the power headroom report (PHR) function.

PHR is used for the terminal device to periodically report the difference between the estimated power of the uplink channel and the maximum transmit power of the terminal device to the network device, so that the network device can perform more appropriate scheduling for the terminal device. The terminal device can indicate the maximum transmit power _PCMAX , power headroom (PH) and bit P of the terminal device to the network device through PHR, where the power headroom can be the difference between the maximum transmit power _PCMAX and the calculated transmit power of the physical uplink shared channel (PUSCH). The maximum transmit power _PCMAX can be obtained based on MPR/P-MPR and the maximum power P _PowerClass of the terminal device, and the bit P is used to indicate whether the power backoff is dominated by P-MPR.

In the FR1 scenario, since the maximum power P _PowerClass of the terminal device is a fixed value, the network device can infer the MPR/P-MPR value based on _{the PCMAX} in the PHR. In the FR2 scenario, since the maximum power P _PowerClass of the terminal device is a range of values rather than a fixed value, the network device cannot infer the MPR/P-MPR value based on _{the PCMAX} in the PHR.

Summary of the invention

The embodiments of the present application provide a method and apparatus for sending a power headroom report, which is used to enable a network device to infer the value of MPR/P-MPR based on the PHR reported by a terminal device in an FR2 scenario.

In a first aspect, a method for sending a power headroom report is provided, comprising: obtaining second indication information according to a correction value of a maximum output power backoff MPR and a power management maximum output power backoff P-MPR and first indication information, wherein the first indication information is used to indicate a preset transmit power of a terminal device, the second indication information is used to indicate a maximum transmit power of the terminal device, and the terminal device operates in a frequency range 2. Send a power headroom report PHR, wherein the PHR includes the second indication information and the third indication information, and the third indication information is used to indicate that the second indication information is obtained from the correction value of the MPR and the first indication information, or that the second indication information is obtained from the P-MPR and the first indication information.

The power margin reporting and sending method provided in the embodiment of the present application obtains the second indication information according to the correction value of the maximum output power backoff MPR and one of the maximum output power backoff P-MPR of the power management and the first indication information, wherein the first indication information is used to indicate the preset transmit power of the terminal device, and the second indication information is used to indicate the maximum transmit power of the terminal device, and the terminal device operates in the frequency range 2; the power margin reporting PHR is sent, wherein the PHR includes the second indication information and the third indication information, and the third indication information is used to indicate that the second indication information is obtained by the correction value of the MPR and the first indication information, or, indicates that the second indication information is obtained by the P-MPR and the first indication information. Since the preset transmit power of the terminal device indicated by the first indication information is known to the network device and the terminal device, the maximum transmit power of the terminal device calculated according to the first indication information is the same, so that the network device and the terminal device have the same understanding of the maximum transmit power, so that the MPR or P-MPR can be accurately deduced from the reporting of the PHR. It is realized that in the FR2 scenario, the network device can deduced the value of the MPR/P-MPR according to the PHR reported by the terminal device.

In a possible implementation, the first indication information is a default value known to the terminal device and the network device, or the first indication information is determined according to the power level in frequency range 2, or the first indication information is determined according to various combinations of carrier aggregation CA or dual connection DC.

In a possible implementation, the method further includes: sending first indication information. The first indication information may be a value specified by the protocol, or may be sent by the terminal device to the network device, so that the terminal device and the network device have consistent understanding of the first indication information.

In a possible implementation, the first indication information is carried in a radio resource control RRC signaling. In this implementation, the first indication information may be carried in the RRC signaling.

In a possible implementation manner, the first indication information is carried in a user equipment UE capability report of RRC signaling. Specifically, the first indication information may be carried in a UE capability report of RRC signaling.

In a possible implementation, obtaining the second indication information according to one of the revised value of the maximum output power backoff MPR and the power management maximum output power backoff P-MPR and the first indication information includes: obtaining the second indication information _PCMAX,f,c by calculation according to the following formula: _PCMAX,f,c = _{PCMAX_ref} -MAX(xMPR _f,c , P-MPR _f,c ), wherein _{PCMAX_ref} is the first indication information, xMPR _f,c is the revised value of MPR, and P-MPR _f,c is P-MPR.

In a second aspect, a method for sending a power headroom report is provided, characterized in that it includes: receiving a power headroom report PHR, wherein the PHR includes second indication information and third indication information, the second indication information is used to indicate the maximum transmit power of the terminal device, and the third indication information is used to indicate that the second indication information is obtained by a correction value of a maximum output power backoff MPR and the first indication information, or that the second indication information is obtained by a power management maximum output power backoff P-MPR and the first indication information, and the first indication information is used to indicate a preset transmit power of the terminal device. Determine the correction value of the MPR or the P-MPR according to the second indication information and the third indication information.

The power margin reporting and sending method provided in the embodiment of the present application obtains the second indication information according to the correction value of the maximum output power backoff MPR and one of the maximum output power backoff P-MPR of the power management and the first indication information, wherein the first indication information is used to indicate the preset transmit power of the terminal device, and the second indication information is used to indicate the maximum transmit power of the terminal device, and the terminal device operates in the frequency range 2; the power margin reporting PHR is sent, wherein the PHR includes the second indication information and the third indication information, and the third indication information is used to indicate that the second indication information is obtained by the correction value of the MPR and the first indication information, or, indicates that the second indication information is obtained by the P-MPR and the first indication information. Since the preset transmit power of the terminal device indicated by the first indication information is known to the network device and the terminal device, the maximum transmit power of the terminal device calculated according to the first indication information is the same, so that the network device and the terminal device have the same understanding of the maximum transmit power, so that the MPR or P-MPR can be accurately deduced from the reporting of the PHR. It is realized that in the FR2 scenario, the network device can deduced the value of the MPR/P-MPR according to the PHR reported by the terminal device.

In a possible implementation, the first indication information is a default value known to the terminal device and the network device, or the first indication information is determined according to the power level in frequency range 2, or the first indication information is determined according to various combinations of carrier aggregation CA or dual connection DC.

In a possible implementation, the method further includes: receiving first indication information. The first indication information may be a value specified by the protocol, or may be sent by the terminal device to the network device, so that the terminal device and the network device have consistent understanding of the first indication information.

In a possible implementation, the first indication information is carried in a radio resource control RRC signaling. In this implementation, the first indication information may be carried in the RRC signaling.

In a possible implementation manner, the first indication information is carried in a user equipment UE capability report of RRC signaling. Specifically, the first indication information may be carried in a UE capability report of RRC signaling.

In a possible implementation, determining the MPR or P-MPR according to the second indication information and the third indication information includes: the third indication information indicates that the second indication information is obtained from the MPR and the first indication information, and the MPR correction value xMPR _f,c is calculated according to the following formula: xMPR _f,c = _{PCMAX_ref -PCMAX,f,c} ; or, the third indication information indicates that the second indication information is obtained from the P-MPR and the first indication information, and the P-MPR P-MPR _f,c is calculated according to the following formula: P-MPR _f,c = _{PCMAX_ref -PCMAX,f,c} , where _{PCMAX_ref} is the first indication information and _PCMAX,f,c is the second indication information.

In a third aspect, a communication device is provided, including: a processing module, configured to obtain second indication information according to one of a correction value of a maximum output power backoff MPR and a power management maximum output power backoff P-MPR and first indication information, wherein the first indication information is used to indicate a preset transmit power of a terminal device, the second indication information is used to indicate a maximum transmit power of the terminal device, and the terminal device operates in a frequency range 2. A transceiver module, configured to send a power margin report PHR, wherein the PHR includes the second indication information and the third indication information, and the third indication information is used to indicate that the second indication information is obtained from the correction value of the MPR and the first indication information, or that the second indication information is obtained from the P-MPR and the first indication information.

In a possible implementation, the first indication information is a default value known to the terminal device and the network device, or the first indication information is determined according to the power level in frequency range 2, or the first indication information is determined according to various combinations of carrier aggregation CA or dual connection DC.

In a possible implementation manner, the transceiver module is further configured to: send first indication information.

In a possible implementation manner, the first indication information is carried in radio resource control RRC signaling.

In a possible implementation manner, the first indication information is carried in a user equipment UE capability report in RRC signaling.

In a possible implementation, the processing module is specifically used to: calculate the second indication information _PCMAX,f,c according to the following formula: _PCMAX,f,c = _{PCMAX_ref} -MAX(xMPRf _,c , P-MPRf _,c ), wherein _{PCMAX_ref} is the first indication information, xMPRf _,c is the corrected value of MPR, and P-MPRf _,c is P-MPR.

In a fourth aspect, a communication device is provided, characterized in that it includes: a transceiver module, which is used to receive a power margin report PHR, wherein the PHR includes second indication information and third indication information, the second indication information is used to indicate the maximum transmit power of the terminal device, and the third indication information is used to indicate that the second indication information is obtained by the correction value of the maximum output power backoff MPR and the first indication information, or, indicates that the second indication information is obtained by the power management maximum output power backoff P-MPR and the first indication information, and the first indication information is used to indicate the preset transmit power of the terminal device. A processing module is used to determine the correction value of the MPR or the P-MPR according to the second indication information and the third indication information.

In a possible implementation, the first indication information is a default value known to the terminal device and the network device, or the first indication information is determined according to the power level in frequency range 2, or the first indication information is determined according to various combinations of carrier aggregation CA or dual connection DC.

In a possible implementation manner, the transceiver module is further configured to: receive first indication information.

In a possible implementation manner, the first indication information is carried in radio resource control RRC signaling.

In a possible implementation manner, the first indication information is carried in a user equipment UE capability report in RRC signaling.

In a possible implementation, the processing module is specifically used to: the third indication information indicates that the second indication information is obtained from the corrected value of the MPR and the first indication information, and the corrected value of the MPR xMPR _f,c is calculated according to the following formula: xMPR _f,c = _{PCMAX_ref -PCMAX,f,c} ; or, the third indication information indicates that the second indication information is obtained from the P-MPR and the first indication information, and the P-MPR P-MPR _f,c is calculated according to the following formula: P-MPR _f,c = _{PCMAX_ref -PCMAX,f,c} , wherein _{PCMAX_ref} is the first indication information and _PCMAX,f,c is the second indication information.

In a fifth aspect, a communication device is provided, which includes a processor, a memory and a transceiver. The processor is coupled to the memory. When the processor executes a computer program or instruction in the memory, the method of the first aspect and any embodiment thereof is executed.

In a sixth aspect, a communication device is provided, comprising a processor, a memory and a transceiver, wherein the processor is coupled to the memory, and when the processor executes a computer program or instruction in the memory, the method of the second aspect and any one of its embodiments is executed.

In a seventh aspect, a chip is provided, comprising: a processor and an interface, for calling and running a computer program stored in the memory from a memory, and executing the method as described in the first aspect to the second aspect and any one of them.

In an eighth aspect, a computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium. When the instructions are executed on a computer or a processor, the computer or the processor executes the method of the first aspect to the second aspect and any one of them.

In a ninth aspect, a computer program product comprising instructions is provided, which, when executed on a computer or a processor, causes the computer or the processor to execute a method as in the first to sixth aspects and any one of the methods.

In a tenth aspect, a communication system is provided, comprising a communication device as in the third aspect and a communication device as in the fourth aspect, or comprising a communication device as in the fifth aspect and a communication device as in the sixth aspect.

The technical effects of the third to tenth aspects can refer to the contents described in the various possible implementation modes of the first aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

FIG4 is a schematic diagram of a reporting structure of a PH MAC CE provided in an embodiment of the present application;

FIG5 is a schematic diagram of another reporting structure of a PH MAC CE provided in an embodiment of the present application;

FIG6 is a schematic diagram of another reporting structure of a PH MAC CE provided in an embodiment of the present application;

FIG7 is a schematic diagram of a flow chart of a method for reporting and sending power headroom according to an embodiment of the present application;

FIG8 is a first structural diagram of a communication device provided in an embodiment of the present application;

FIG. 9 is a second structural diagram of a communication device provided in an embodiment of the present application.

DETAILED DESCRIPTION

The embodiments of the present application can be applied to both time division duplexing (TDD) scenarios and frequency division duplexing (FDD) scenarios.

The embodiments of the present application are described based on the scenario of the fifth generation (5th generation, 5G) communication network in the wireless communication network. It should be noted that the scheme in the embodiments of the present application can also be applied to other wireless communication networks, such as the sixth generation mobile communication system, and the corresponding names can also be replaced by the names of corresponding functions in other wireless communication networks. The 5G mobile communication system involved in the present application includes a non-standalone (NSA) 5G mobile communication system and/or a standalone (SA) 5G mobile communication system.

The embodiments of the present application may be applicable to a long term evolution (LTE) system, such as a narrow band internet of things (NB-IoT) system, or to an advanced long term evolution (LTE Advanced, LTE-A) system. It may also be applicable to other wireless communication systems, such as a global system for mobile communication (GSM), a universal mobile telecommunications system (UMTS), a code division multiple access (CDMA) system, and new network equipment systems.

As shown in FIG. 1 , a communication system 100 provided in an embodiment of the present application includes a network device 101 and terminal devices 102 - 107 .

The terminal device involved in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal may communicate with one or more core networks via a radio access network (RAN). The wireless terminal may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and/or data with a radio access network. For example, user equipment (UE), personal communication service (PCS) phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA) and other devices. A wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment. Exemplarily, the terminal device may be a high-speed rail communication device 102, an intelligent air conditioner 103, an intelligent gas station 104, a mobile phone 105, an intelligent tea cup 106, a printer 107, etc., which is not limited in this application.

The network device involved in the embodiment of the present application may be a base station, which can be used to convert received air frames to Internet Protocol (IP) packets, as a router between the wireless terminal and the rest of the access network, wherein the rest of the access network may include IP network devices. The base station can also coordinate the attribute management of the air interface. For example, the base station can be a base station (base transceiver station, BTS) in GSM or CDMA, or a base station (NodeB) in wideband code division multiple access (WCDMA), or an evolutionary base station (eNB or e-NodeB) in LTE, or a gNB in 5G, which is not limited by the embodiment of the present application. The above base stations are only examples, and the network equipment can also be a relay station, an access point, a vehicle-mounted device, a wearable device, and other types of devices.

As shown in FIG2 , taking a mobile phone as an example, the structure of the terminal device is described.

The terminal device 105 may include: a radio frequency (RF) circuit 110, a memory 120, an input unit 130, a display unit 140, a sensor 150, an audio circuit 160, a wireless fidelity (Wi-Fi) module 170, a processor 180, a Bluetooth module 181, and a power supply 190 and other components.

The RF circuit 110 can be used to receive and send signals during the process of sending and receiving information or making calls. It can receive downlink data from the base station and hand it over to the processor 180 for processing; it can send uplink data to the base station. Generally, the RF circuit includes but is not limited to antennas, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer and other devices.

The memory 120 can be used to store software programs and data. The processor 180 executes various functions and data processing of the terminal device 105 by running the software programs or data stored in the memory 120. The memory 120 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device. The memory 120 stores an operating system that enables the terminal device 105 to run, such as the operating system developed by Apple Inc. Operating system, developed by Google Open source operating system developed by Microsoft Operating system, etc. In the present application, the memory 120 can store an operating system and various application programs, and can also store codes for executing the method of the embodiment of the present application.

The input unit 130 (e.g., a touch screen) may be used to receive input digital or character information and generate signal inputs related to user settings and function control of the terminal device 105. Specifically, the input unit 130 may include a touch screen 131 disposed on the front of the terminal device 105, which may collect user touch operations on or near it.

The display unit 140 (i.e., display screen) can be used to display information input by the user or information provided to the user and a graphical user interface (GUI) of various menus of the terminal device 105. The display unit 140 may include a display screen 141 disposed on the front of the terminal device 105. Among them, the display screen 141 can be configured in the form of a liquid crystal display, a light emitting diode, etc. The display unit 140 can be used to display various graphical user interfaces described in this application. The touch screen 131 can be covered on the display screen 141, or the touch screen 131 can be integrated with the display screen 141 to realize the input and output functions of the terminal device 105, and the integration can be referred to as a touch display screen.

The terminal device 105 may further include at least one sensor 150, such as a light sensor, a motion sensor, or other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor.

The audio circuit 160, the speaker 161, and the microphone 162 can provide an audio interface between the user and the terminal device 105. The audio circuit 160 can transmit the received audio data to the speaker 161 after converting the received audio data into an electrical signal, which is converted into a sound signal for output; on the other hand, the microphone 162 converts the collected sound signal into an electrical signal, which is received by the audio circuit 160 and converted into audio data, and then the audio data is output to the RF circuit 110 to be sent to, for example, another terminal, or the audio data is output to the memory 120 for further processing.

Wi-Fi is a short-range wireless transmission technology. The terminal device 105 can help users send and receive emails, browse web pages, and access streaming media through the Wi-Fi module 170, which provides users with wireless broadband Internet access.

The processor 180 is the control center of the terminal device 105. It uses various interfaces and lines to connect various parts of the entire terminal. It executes various functions of the terminal device 105 and processes data by running or executing software programs stored in the memory 120 and calling data stored in the memory 120. In this application, the processor 180 may refer to one or more processors, and the processor 180 may include one or more processing units; the processor 180 may also integrate an application processor and a baseband processor, wherein the application processor mainly processes the operating system, user interface and application programs, and the baseband processor mainly processes wireless communication. It is understandable that the above-mentioned baseband processor may not be integrated into the processor 180. In this application, the processor 180 can run the operating system, application programs, user interface display and touch response, as well as the communication method described in the embodiment of this application.

The Bluetooth module 181 is used to exchange information with other Bluetooth devices having Bluetooth modules through the Bluetooth protocol. For example, the terminal device 105 can establish a Bluetooth connection with a wearable electronic device (such as a smart watch) that also has a Bluetooth module through the Bluetooth module 181 to exchange data.

The terminal device 105 also includes a power supply 190 (such as a battery) for supplying power to various components. The power supply can be logically connected to the processor 180 through a power management system, so that the power management system can manage functions such as charging, discharging, and power consumption.

As shown in FIG3 , an embodiment of the present application provides a schematic diagram of the structure of a network device. The network device 300 may include one or more radio frequency units, such as a remote radio unit (RRU) 310 and one or more baseband units (BBU) (also referred to as a digital unit (DU)) 320. The RRU 310 may be referred to as a transceiver unit. Optionally, the transceiver unit 310 may also be referred to as a transceiver, a transceiver circuit, a transceiver, a transmitter and a receiver, etc., and may include at least one antenna 311 and an RF circuit 312. Optionally, the transceiver unit 310 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or a receiver, a receiving circuit), and the transmitting unit may correspond to a transmitter (or a transmitter, a transmitting circuit). The RRU 310 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals, for example, for sending indication information to a terminal device. The BBU 320 part is mainly used for baseband processing, controlling network devices, etc. The RRU 310 and the BBU 320 may be physically arranged together or physically separated, that is, a distributed base station.

The BBU 320 is the control center of the network device, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, etc. For example, the BBU 320 can be used to control the network device to execute the method involved in this application.

In one example, the BBU 320 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE network), or may respectively support wireless access networks of different access standards (such as an LTE network, a 5G network, or other networks). The BBU 320 also includes a memory 322 and a processor 321. The memory 322 is used to store necessary instructions and data. The processor 321 is used to control the network device to perform necessary actions, such as controlling the network device to execute the method involved in this application. The processor 321 in this application may refer to one or more processors. The memory 322 and the processor 321 may serve one or more single boards. In other words, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may be set on each single board.

In addition, the network equipment is not limited to the above-mentioned forms, but may also be in other forms: for example, including a BBU and an adaptive radio unit (ARU), or a BBU and an active antenna unit (AAU); it may also be customer premises equipment (CPE), or it may be in other forms, which are not limited in the present application.

First, some concepts involved in this application are described:

Power headroom report (PHR):

Since the 4th generation (4G) long term evolution (LTE) communication system, PHR has been an important part of uplink power control related protocols. In the 5G communication system, PHR related protocols are basically used.

PHR is mainly used for the terminal device to periodically report the difference between the estimated power of the uplink channel and the maximum transmit power of the terminal device to the network, so that the network device can perform more appropriate scheduling for the terminal device. The PHR related protocol belongs to the media access control (MAC) layer protocol. The terminal device reports the power headroom (PH) through the media access control control element (MAC CE). In the early version of LTE, the reporting structure of PH MAC CE is shown in Figure 4. The MAC CE includes eight bits. The first two bits R represent reserved bits. PH represents power headroom (PH), which occupies six bits. Its value is in intervals of 2dB, covering from -32dB to +38dB.

There are many subcategories of PH, but the calculation formulas are similar. Taking the type 1 PH in the new radio (NR) protocol as an example, its calculation formula is as follows:

Among them, _PCMAX,f,c (i) represents the maximum transmit power Pcmax of the terminal device, and the formula in {} means the calculated transmit power of the physical uplink shared channel (PUSCH). The difference between the two is PH. The definition of the maximum transmit power _PCMAX of the terminal device is slightly different in different scenarios of 4G and 5G. Taking 5GFR1 as an example, the formula is expressed as Formula 2:

_{PCMAX_L,f,c ≤PCMAX,f,c ≤PCMAX_H,f,cFormula} 2

in:

P _{CMAX_H,f,c} =MIN{P _EMAX,c ,P _PowerClass -ΔP _PowerClass } Formula 4

The value of _PCMAX,f,c is mainly determined by _{PCMAX_L,f,c} calculated by formula 3.

In the above formula, ΔT _C,c is a fixed value related to whether the frequency point is at the edge of the band. A-MPR _c is additionally configured by the network device for the terminal device in the RRC signaling. _{ΔT IB,c} is the power relaxation additionally allowed for supporting carrier aggregation (CA) or (dual connectivity, DC). _{ΔT RxSRS} is the power bias related to the sounding reference signal (SRS) channel. Maximum output power reduction (MPR) is a power backoff related to the modulation method, etc., and P-MPR is a power backoff related to SAR/MPE.

The MAX(MPR _c ,A-MPR _c )+ΔTIB _,c +ΔTC _,c + _ΔTRxSRS in the above formula 3 is abbreviated as xMPR, and the fixed quantities are simplified to:

_{PCMAX_L,f,c} = _PPowerClass -MAX( _xMPRc , P- _MPRc ) Formula 5

Wherein, P _PowerClass is the maximum power of the terminal device specified by the protocol as shown in Table 1, power class 2 corresponds to 26 dBm, and power class 3 corresponds to 23 dBm.

Table 1

In summary, PH reporting is related to the maximum transmit power _PCMAX of the terminal device after backoff and the calculated transmit power of PUSCH. Assuming that the terminal device reports a PH of 3dB, the network device only knows that the terminal device has 3dB of power margin after a series of power backoffs, but the network device cannot know the actual transmit power of the terminal device.

In order to solve the problem that the network equipment does not know the actual transmission power of the terminal equipment in PH reporting, the R10 version of LTE introduced the extended PHR MAC CE based on the original reporting structure. In the new reporting structure, the protocol introduced the reporting of the maximum transmission power _PCMAX of the terminal equipment.

As shown in FIG5 , before the reporting structure shown in FIG4 , multiple PHR existence indications _Ci are added, where _Ci = 1 indicates that the serving cell with serving cell index (ServCellIndex) i has PH reported. One of the two reserved bits R in the eight bits of the original reporting structure is redefined as V, indicating whether the calculation method of PH is based on the actual PUSCH transmission. After the original reporting structure, eight bits are added to report the maximum transmit power _PCMAX of the terminal device, of which the first two bits are reserved bits, and the maximum transmit power _PCMAX occupies six bits, and its value is in intervals of 1dB, covering from -29dBm to 33dBm.

After the terminal device reports the maximum transmit power _PCMAX , the network device not only knows the power margin of the terminal device's transmit power, but also knows the actual transmit power of the terminal device. Assuming that the terminal device reports PH, where V = 0, PH = 0dB, _PCMAX = 20dBm, the network device can infer:

V=0 indicates that the current report is the PH reported based on the transmit power calculated according to the actual PUSCH.

PH=0 means that the power margin of the transmit power reported by the terminal device this time is 0.

PH = 0 and _PCMAX = 20 means that the PUSCH transmit power calculated for this report is 20dBm, and the actual transmit power is also 20dBm;

_PCMAX = 20 means that the uplink power of the terminal device is limited by 3dB.

As shown in FIG6 , the R11 version of LTE introduces a bit P, and the bit P=1 indicates that the reason why the maximum transmit power _PCMAX in the PH report is lower than _PPowerClass is P-MPRc.

With the bit P, the network device can know the specific reasons why the maximum transmit power _PCMAX of the terminal device is limited, and then handle them separately. For example, P=1 means that the maximum transmit power _PCMAX of the terminal device is limited because of SAR/MPE, etc. The network device can increase the transmit power of the terminal device by reducing uplink scheduling, etc., to achieve better overall network performance. P=0 means that the maximum transmit power _PCMAX of the terminal device is limited because of xMPR. xMPR is mainly caused by the adjustment method and waveform characteristics of the uplink. The network device can increase the transmit power of the terminal device by changing the adjustment method, etc., to achieve the purpose of improving overall performance.

The difference in maximum transmit power between frequency range (FR) 1 and FR2 is:

The maximum transmission power of FR1 has been described above and will not be repeated here. The maximum transmission power of FR2 will be described in detail below.

In FR2, terminal devices are divided into four power classes: power class 1 corresponds to fixed wireless access (FWA) terminal devices, power class 2 corresponds to vehicular terminal devices, power class 3 corresponds to handheld terminal devices, and power class 4 corresponds to high power non-handheld terminal devices. Mobile phones generally belong to power class 3. Take power class 3 as an example: Table 2 defines the lower limit of the effective isotropic radiated power (EIRP) of power class 3, and Table 3 defines the upper limit of the total radiated power (TRP) and EIRP of power class 3.

Table 2

Table 3

It can be seen that the EIRP range of the working frequency band n257 of power level 3 is 22.4-43dBm, and the maximum TRP is 23dBm.

The maximum transmit power _PCMAX of the terminal equipment in FR2 is defined in two dimensions: _PUMAX and _PTMAX . _PUMAX and _PTMAX are within the following ranges:

P _TMAX,f,c ≤TRP _max Formula 7

Wherein, _PUMAX is a range with an upper limit of _EIRPmax and a lower limit similar to FR1, which is related to xMPR (in the case of FR2, xMPR is MAX(MPRf _,c , A-MPRf _,c ) + ΔMBP _,n ) and P-MPR. _ΔMBP,n is the additional power backoff allowed when the terminal device supports multiple FR2 frequency bands. The definition of function T() in formula 6 is shown in Table 4:

Table 4

Taking the lower limit of Formula 6 as _PCMAX and adjusting the order, it can be written as:

Compared with Formula 5 of FR1, the maximum power P _PowerClass of FR2 is a range, and the range of the T function is also large. It is impossible to reversely infer the size of xMPR and P-MPR from the PH report like FR1.

Specific absorption rate (SAR), maximum permissible exposure (MPE):

SAR, also known as the specific absorption rate, is the ratio of the energy absorbed by the human body to the electromagnetic waves of mobile phones or wireless products. Under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. The differential value of the energy (dW) absorbed (dissipated) by a mass (dm) in a volume (dV) with a given density (ρ) over time is the SAR, in W/kg. This is shown in Formula 9:

Among them, E represents the electric field strength value in the tissue, with the unit of V/m; ρ represents the material density corresponding to different parts of the human body; δ represents the conductivity.

The SAR measuring device detects the size and distribution of the electric field strength value E, and then converts it into the SAR value through calculation. The SAR value is used to determine whether the radiation of terminal devices such as mobile phones exceeds the standard.

The main certification bodies for SAR are FCC and Conformite Europeenne (CE).

Generally speaking, for terminal devices working in FR1, SAR is used to evaluate the impact of ionizing radiation on the human body. For terminal devices working in FR2, due to the high frequency of electromagnetic waves and poor penetration of electromagnetic waves, the maximum permissible exposure MPE is generally used to evaluate the impact of ionizing radiation on the human body (FCC uses MPE, CE uses EMF).

Free space losses and other losses for systems using millimeter wave bands may be much higher than those for systems below 6 GHz. Therefore, for operations in millimeter wave bands, higher EIRP for transmission is generally desired. This is typically accomplished by using one or more antenna arrays to direct the beam in the desired direction. In these systems, a single antenna radiator may fail the MPE limit, or the MPE limit may be exceeded if the beam of the handheld device is directed at a person's body or skin (or some other object to be protected). In addition, for systems that communicate simultaneously via millimeter wave and sub-6 GHz bands, SAR limits and/or MPE limits may be exceeded.

The FCC and ICNIRP impose exposure limits on radio frequency (RF) radiation from wireless devices. These limits are specified as SAR for frequency bands below 6 GHz and MPE for frequency bands above 6 GHz.

In order to take into account the regulatory requirements of SAR/MPE, the 5G protocol introduces the P-MPR mentioned above. P-MPR limits the maximum transmit power of terminal devices to meet regulatory requirements.

5G protocol already has SAR/MPE solution

Due to the introduction of high-power terminal devices and the higher EIRP caused by FR2 mmWave beamforming, the challenge for terminal devices to meet SAR/MPE is becoming increasingly greater.

There are currently two main solutions for the 5G protocol to solve the SAR/MPE problem:

Solution 1: P-MPR in PHR-related protocols. The terminal device selects P-MPR based on its own usage scenario to ensure compliance with the electromagnetic radiation requirements of the regulatory agency. In some scenarios, P-MPR may be greater than 10dB or even 15dB.

Solution 2: The NR R15 protocol introduces the terminal equipment capability item maximum uplink duty cycle (maxUplinkDutyCycle), which means that the terminal equipment indicates the maximum percentage of symbols that can be scheduled for uplink transmission within a certain evaluation period to ensure compliance with the regulatory agency's electromagnetic radiation requirements. Specifically, this capability item is divided into two sub-capabilities (maxUplinkDutyCycle-PC2-FR1 and maxUplinkDutyCycle-FR2) under FR1 and FR2 and reported separately.

Currently, 3GPP is developing the 5G R16 protocol to increase the performance of MPE in FR2 scenarios. The purpose is to avoid major and unpredictable radio link failures and connection releases caused by MPE in terminal devices in FR2.

Assume that the actual maximum transmit power of the FR1 terminal device is 23dBm, and there are two PHR reports as shown in Table 5:

First PHR reporting: xMPR is 3dB, P-MPR is 0dB; the terminal device can calculate the maximum transmit power of the terminal device _PCMAX,f,c = 23-3 = 20dBm according to Formula 5, and then report PHR in the format shown in Figure 6, where bit P is set to 0.

Second PHR reporting: xMPR is 3dB, P-MPR is 5dB; the terminal device can calculate the maximum transmit power of the terminal device _PCMAX,f,c = 23-5 = 18dBm according to Formula 5, and then report PHR in the format shown in FIG6 , where bit P is set to 1.

Table 5

According to Formula 5 and the bit position P, it can be inferred that the xMPR corresponding to the first PHR report is 3dB, and the P-MPR corresponding to the second PHR report is 5dB.

For FR2, the transmit power P _PowerClass is not a fixed value but a range of values. Network equipment cannot infer xMPR or P-MPR based on Formula 8.

The power headroom reporting and sending method provided in the present application replaces P _PowerClass in Formula 8 with a reference value _{PCMAX_ref} that can be determined by both the network device and the terminal device in FR2, thereby calculating the maximum transmit power _PCMAX,f,c according to Formula 8, so that the network device and the terminal device have a consistent understanding of the maximum transmit power _PCMAX,f,c , so that the MPR or P-MPR can be accurately deduced from the PHR report.

As shown in FIG. 7 , the power headroom reporting and sending method provided in an embodiment of the present application includes:

S701: Obtain second indication information according to one of xMPR and P-MPR and first indication information.

The first indication information is used to indicate the preset transmit power _{PCMAX_ref} of the terminal device, that is, as the reference quantity mentioned above. The first indication information can be the actual maximum transmit power of the terminal device, the maximum transmit power of the antenna port of the terminal device, or a meaningless value.

The terminal equipment operates in FR2.

The second indication information is used to indicate the maximum transmit power P _CMAX,f,c of the terminal device. The maximum transmit power P _CMAX,f,c of the terminal device is described above and will not be repeated here.

Specifically, the second indication information _PCMAX,f,c may be calculated according to Formula 10:

_PCMAX,f,c = _{PCMAX_ref} -MAX(xMPRf _,c ,P-MPRf _,c ) Formula 10

Wherein, _{PCMAX_ref} is the first indication information, P-MPRf _,c is the P-MPR, and xMPR represents the correction value of MPR, which can be exemplarily defined as MAX(MPRf _,c , A-MPRf _,c )+ΔMBP _,n as defined above, then Formula 10 can be replaced by Formula 11:

P _CMAX,f,c =P _{CMAX_ref} -MAX(MAX(MPR _f,c ,A-MPR _f,c )+ΔMB _P,n ,P-MPR _f,c ) Formula 11

Among them, _{PCMAX_ref} is the first indication information, MPR _f,c is the MPR, P-MPR _f,c is the P-MPR, f is the carrier index, c is the serving cell index, and ΔMB _P,n is the additional power backoff allowed when the terminal device supports multiple FR2 frequency bands.

In the protocol TS 38.306, as shown in Tables 6 to 8, there are three places involving the power level of the terminal equipment.

Table 6

Table 7

Table 8

The present application may define the first indication information (eg, parameter ue-Pcmax_ref-for-PHR) as shown in Table 9 after Table 7.

Table 9

The first indication information (e.g., parameter Ue-CA-Pcmax_ref-for-PHR) as shown in Table 10 may also be defined based on Table 8. That is, the first indication information may be used to indicate the preset transmit power of the terminal device in a carrier aggregation (CA) or dual connectivity (DC) scenario.

Table 10

It should be noted that the values of ue-Pcmax_ref-for-PHR and Ue-CA-Pcmax_ref-for-PHR may be the same or different.

As the protocol evolves, if there are new DC/CA combination types or scenarios where the first indication information needs to be reported, corresponding capability items and signaling reporting fields can be added accordingly in accordance with the ideas of this application.

In a possible implementation, the first indication information may be a default value specified by the protocol or known to the terminal device and the network device, for example, 23 dBm. The default value may be determined according to the power class (PC) of FR2, or may be determined according to various combinations of CA/DC. In this way, the terminal device does not need to inform the network device of the first indication information, and the network device and the terminal device can have the same understanding of the maximum transmit power _PCMAX,f,c .

In another possible implementation, the terminal device may send the first indication information to the network device.

It should be noted that the first indication information is optional. For example, if the terminal device does not send the first indication information to the network device, the terminal device and the network device can adopt the default value of the first indication information (for example, 23dBm). If the terminal device sends the first indication information to the network device, the terminal device and the network device can adopt the current value of the first indication information.

In a possible embodiment, the first indication information may be carried in radio resource control (radioresource control, RRC) signaling. Optionally, the value may be reported in a UE capability report of the RRC signaling.

Alternatively, in another possible embodiment, the first indication information may also be carried in MAC CE or uplink control information (UCI), which is not limited in this application. This application takes carrying in RRC signaling as an example, but is not intended to be limited thereto.

For example, the first indication information may be carried in the BandNR sub-reporting item of the RRC signaling.

Among them, the value range of the first indication information is x-y.

The maximum transmit power _PCMAX,f,c of the terminal equipment is specified in the protocol TS 38.133 and occupies six bits. Its value is taken at intervals of 1 dB and ranges from -29 dBm to 33 dBm.

In order to meet the various requirements of the protocol on the output power of the terminal equipment, the terminal equipment must be calibrated before leaving the factory; for FR1, the RF direct connection calibration method is generally used. However, for FR2, since there is no RF direct connection port similar to FR1, the air interface calibration method is generally used. The upper limit of the EIRP of the terminal equipment of power level 1 in FR2 is 55dBm, which is outside the effective resolution range reported by PHR.

Therefore, in this application, the upper limit y of the value of the first indication information can be set to 33dBm. Alternatively, the upper limit y of the value of the first indication information can be set to 55dBm, and accordingly, the value range of the maximum transmit power _PCMAX,f,c of the terminal device is modified to -7dBm to 55dBm. Alternatively, the upper limit y can take other values, and this application does not limit the values of the upper limit y and the lower limit x.

S702: The terminal device sends a PHR.

Accordingly, the network device receives the PHR.

The PHR includes the second indication information and the third indication information.

The third indication information is used to indicate that the second indication information is obtained from the xMPR and the first indication information, or to indicate that the second indication information is obtained from the P-MPR and the first indication information. The third indication information may be the bit P mentioned above.

S703: The network device determines the xMPR or the P-MPR according to the second indication information and the third indication information.

Specifically, in a possible implementation manner, when the third indication information indicates that the second indication information is obtained by xMPR and the first indication information (ie, bit P=0), the network device may calculate xMPR according to formula 12:

xMPR _f,c = _{PCMAX_ref -PCMAX,f,c} Formula 12

Alternatively, when the third indication information indicates that the second indication information is obtained by P-MPR and the first indication information (ie, bit P=1), the network device may calculate P-MPR P-MPR _f,c according to formula 13:

P-MPR _f,c = _{PCMAX_ref -PCMAX,f,c} Formula 13

Among them, _{PCMAX_ref} is the first indication information, and _PCMAX,f,c is the second indication information.

For example, it is assumed that the EIRP of the terminal device working in FR2 is 35 dBm.

First PHR reporting: xMPR is 3dB, P-MPR is 0dB.

Second PHR reporting: xMPR is 3dB, P-MPR is 5dB.

As shown in Table 11, if the terminal device does not report the first indication information _{PCMAX_ref} , the network device may determine that the first indication information _{PCMAX_ref} is a default value, for example, 23dBm.

For the first PHR report, the terminal device can calculate the maximum transmit power _PCMAX,f,c = 23-3 = 20dBm according to formula 10, and then report the PHR according to the format shown in Figure 6, where bit P is set to 0. Accordingly, the network device can calculate xMPR = 23-20 = 3dB according to formula 12.

For the second PHR report, the terminal device can calculate the maximum transmit power _PCMAX,f,c = 23-5 = 18dBm according to formula 10, and then report the PHR in the format shown in Figure 6, where bit P is set to 1. Accordingly, the network device can calculate P-MPR = 23-18 = 5dB according to formula 13.

Table 11

As shown in Table 12, if the terminal device reports the first indication information _{PCMAX_ref} as 33dBm.

For the first PHR report, the terminal device can calculate the maximum transmit power _PCMAX,f,c = 33-3 = 30dBm according to formula 10, and then report the PHR according to the format shown in Figure 6, where bit P is set to 0. Accordingly, the network device can calculate xMPR = 33-30 = 3dB according to formula 12.

For the second PHR report, the terminal device can calculate the maximum transmit power _PCMAX,f,c = 33-5 = 28dBm according to formula 10, and then report the PHR in the format shown in Figure 6, where bit P is set to 1. Accordingly, the network device can calculate P-MPR = 33-28 = 5dB according to formula 13.

Table 12

The power headroom reporting and sending method provided in the embodiment of the present application obtains the second indication information according to the correction value of the maximum output power backoff MPR and one of the maximum output power backoff P-MPR of the power management and the first indication information, wherein the first indication information is used to indicate the preset transmit power of the terminal device, and the second indication information is used to indicate the maximum transmit power of the terminal device, and the terminal device operates in the frequency range 2; the power headroom reporting PHR is sent, wherein the PHR includes the second indication information and the third indication information, and the third indication information is used to indicate that the second indication information is obtained by the correction value of the MPR and the first indication information, or, indicates that the second indication information is obtained by the P-MPR and the first indication information. Since the preset transmit power of the terminal device indicated by the first indication information is known to the network device and the terminal device, the maximum transmit power of the terminal device calculated according to the first indication information is the same, so that the network device and the terminal device have the same understanding of the maximum transmit power, so that the xMPR or P-MPR can be accurately deduced from the reporting of the PHR. It is realized that in the FR2 scenario, the network device can deduced the value of the xMPR/P-MPR according to the PHR reported by the terminal device.

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 chip or functional module in the 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 chip or functional module in the 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, take the communication device as the terminal device in the above method embodiment as an example. Figure 8 shows a schematic diagram of the structure of a communication device 80. The communication device 80 includes a processing module 8001 and a transceiver module 8002. The communication device 80 can be the terminal device in Figure 7. The processing module 8001 can also be called a processing unit, which is used to implement the processing function of the terminal device in the above method embodiment. For example, execute step S701 in Figure 7. The transceiver module 8002 can also be called a transceiver unit, which is used to implement the transceiver function of the terminal device in the above method embodiment. For example, execute step S702 in Figure 7. The transceiver module 8002 can be called a transceiver circuit, a transceiver, a transceiver or a communication interface.

Exemplarily, processing module 8001 is used to obtain second indication information based on a correction value of the maximum output power backoff MPR, one of the power management maximum output power backoff P-MPR, and the first indication information, wherein the first indication information is used to indicate a preset transmit power of the terminal device, the second indication information is used to indicate the maximum transmit power of the terminal device, and the terminal device operates in frequency range 2.

The transceiver module 8002 is used to send a power headroom report PHR, wherein the PHR includes second indication information and third indication information, and the third indication information is used to indicate that the second indication information is obtained by the correction value of the MPR and the first indication information, or to indicate that the second indication information is obtained by the P-MPR and the first indication information.

In a possible implementation, the first indication information is a default value known to the terminal device and the network device, or the first indication information is determined according to the power level in frequency range 2, or the first indication information is determined according to various combinations of carrier aggregation CA or dual connection DC.

In a possible implementation, the transceiver module 8002 is further used to: send first indication information.

In a possible implementation manner, the first indication information is carried in radio resource control RRC signaling.

In a possible implementation manner, the first indication information is carried in a user equipment UE capability report of RRC signaling. Specifically, the first indication information may be carried in a UE capability report of RRC signaling.

In a possible implementation, the processing module 8001 is specifically used to: calculate the second indication information _PCMAX,f,c according to the following formula: _PCMAX,f,c = _{PCMAX_ref} -MAX(xMPRf _,c , P-MPRf _,c ), wherein _{PCMAX_ref} is the first indication information, _xMPRf,c is the corrected value of MPR, and P- _MPRf,c is P-MPR.

In this embodiment, the communication device 80 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 communication device 80 can take the form of the terminal device 105 shown in Figure 2.

For example, the processor 180 in the terminal device 105 shown in FIG. 2 may call the computer execution instructions stored in the memory 120 to enable the terminal device 105 to execute the method in the above method embodiment.

Specifically, the function/implementation process of the processing module 8001 in FIG8 can be implemented by the processor 180 in the terminal device 105 shown in FIG2 calling the computer execution instructions stored in the memory 120. Alternatively, the function/implementation process of the transceiver module 8002 in FIG8 can be implemented by the RF circuit 110 in the terminal device 105 shown in FIG2.

Since the communication device 80 provided in this embodiment can execute the above method, the technical effects that can be obtained can refer to the above method embodiment and will not be repeated here.

For example, take the communication device as the network device in the above method embodiment. Figure 9 shows a schematic diagram of the structure of a communication device 90. The communication device 90 includes a processing module 9001 and a transceiver module 9002. The communication device 80 can be the network device in Figure 7. The processing module 9001 can also be called a processing unit, which is used to implement the processing function of the network device in the above method embodiment. For example, execute step S703 in Figure 7. The transceiver module 9002 can also be called a transceiver unit, which is used to implement the transceiver function of the network device in the above method embodiment. For example, execute step S702 in Figure 7. The transceiver module 9002 can be called a transceiver circuit, a transceiver, a transceiver or a communication interface.

Exemplarily, the transceiver module 9002 is used to receive a power headroom report PHR, wherein the PHR includes second indication information and third indication information, the second indication information is used to indicate the maximum transmit power of the terminal device, the third indication information is used to indicate that the second indication information is obtained by a correction value of the maximum output power backoff MPR and the first indication information, or, indicates that the second indication information is obtained by the power management maximum output power backoff P-MPR and the first indication information, and the first indication information is used to indicate the preset transmit power of the terminal device.

The processing module 9001 is used to determine a modified value of MPR or P-MPR according to the second indication information and the third indication information.

In a possible implementation, the first indication information is a default value known to the terminal device and the network device, or the first indication information is determined according to the power level in frequency range 2, or the first indication information is determined according to various combinations of carrier aggregation CA or dual connection DC.

In a possible implementation, the transceiver module 9002 is further used to: receive first indication information.

In a possible implementation manner, the first indication information is carried in radio resource control RRC signaling.

In a possible implementation manner, the first indication information is carried in a user equipment UE capability report of RRC signaling. Specifically, the first indication information may be carried in a UE capability report of RRC signaling.

In a possible implementation, the processing module 9001 is specifically used to: the third indication information indicates that the second indication information is obtained from the corrected value of the MPR and the first indication information, and the corrected value of the MPR xMPR _f,c is calculated according to the following formula: xMPR _f,c = _{PCMAX_ref -PCMAX,f,c} ; or, the third indication information indicates that the second indication information is obtained from the P-MPR and the first indication information, and the P-MPR P-MPR _f,c is calculated according to the following formula: P-MPR _f,c = _{PCMAX_ref -PCMAX,f,c} , wherein _{PCMAX_ref} is the first indication information and _PCMAX,f,c is the second indication information.

In this embodiment, the communication device 90 is presented in the form of dividing each functional module 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 communication device 90 can take the form of the network device 300 shown in Figure 3.

For example, the processor 301 in the network device 300 shown in FIG. 3 may call the computer execution instructions stored in the memory 302 to enable the network device 300 to execute the method in the above method embodiment.

Specifically, the function/implementation process of the processing module 9001 in FIG9 can be implemented by the processor 321 in the network device 300 shown in FIG3 calling the computer execution instruction stored in the memory 322. Alternatively, the function/implementation process of the transceiver module 9002 in FIG9 can be implemented by the RF circuit 312 in the network device 300 shown in FIG3.

Since the communication device 90 provided in this embodiment can execute the above method, the technical effects that can be obtained can refer to the above method embodiment and will not be repeated here.

An embodiment of the present application also provides a communication device, which includes a processor, a memory and a transceiver. The processor is coupled to the memory. When the processor executes a computer program or instruction in the memory, the method corresponding to the terminal device in Figure 7 is executed.

An embodiment of the present application also provides a communication device, which includes a processor, a memory and a transceiver. The processor is coupled to the memory. When the processor executes a computer program or instruction in the memory, the method corresponding to the network device in Figure 7 is executed.

An embodiment of the present application also provides a chip, including: a processor and an interface, for calling and running a computer program stored in the memory from the memory, and executing a method corresponding to the terminal device or network device in Figure 7.

An embodiment of the present application also provides a computer-readable storage medium, which stores instructions. When the instructions are executed on a computer or a processor, the computer or the processor executes the method corresponding to the terminal device or the network device in FIG. 7 .

The embodiment of the present application also provides a computer program product including instructions, which, when executed on a computer or a processor, enables the computer or the processor to execute the method corresponding to the terminal device or the network device in FIG. 7 .

An embodiment of the present application provides a chip system, which includes a processor, and is used for a communication device to execute a method corresponding to the terminal device or network device in Figure 7.

In one possible design, the chip system also includes a memory, which is used to store program instructions and data necessary for the terminal device. The chip system may include a chip, an integrated circuit, or a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

Among them, the communication device, chip, computer storage medium, computer program product or chip system provided in this application is used to execute the method described above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the implementation methods provided above and will not be repeated here.

The processor involved in the embodiments of the present application may be a chip. For example, it may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

The memory involved in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. 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 be beyond the scope of this application.

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

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

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 loading and executing a computer program instruction 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 devices. 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, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (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 may contain one or more servers, data centers and other data storage devices that can be integrated with a medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (25)

1. A power headroom report sending method, characterized in that, comprising: The second indication information is obtained according to the correction value of the maximum output power backoff MPR and one of the power management maximum output power backoff P-MPR and the first indication information, where the first indication information is used to indicate the terminal device preset transmit power, the second indication information is used to indicate the maximum transmit power of the terminal device, and the terminal device works in frequency range 2; Sending a power headroom report PHR, wherein the PHR includes the second indication information and third indication information, and the third indication information is used to indicate that the second indication information is a combination of the correction value of the MPR and the The first indication information is obtained, or indicates that the second indication information is obtained from the P-MPR and the first indication information. 2. The method according to claim 1, wherein the first indication information is a default value known to the terminal equipment and the network equipment, or the first indication information is determined according to the power level of the frequency range 2, Alternatively, the first indication information is determined according to various combinations of carrier aggregation CA or dual connectivity DC. 3. The method according to claim 1, wherein the method further comprises: Send the first indication information. 4. The method according to claim 3, wherein the first indication information is carried in Radio Resource Control (RRC) signaling. 5. The method according to claim 4, wherein the first indication information is carried in the UE capability report of the RRC signaling. 6. The method according to any one of claims 1-5, characterized in that, one of the maximum output power backoff P-MPR according to the correction value of the maximum output power backoff and the power management backoff P-MPR and the first indication The message gets a second instruction message, including: The second indication information P _CMAX,f,c is calculated according to the following formula: P _CMAX,f,c =P _{CMAX_ref} -MAX(xMPR _f,c ,P-MPR _f,c ), Wherein, _{PCMAX_ref} is the first indication information, xMPR _f,c is a correction value of the MPR, and P-MPR _f,c is the P-MPR. 7. A power headroom report sending method, characterized in that, comprising: The received power headroom reports PHR, wherein the PHR includes second indication information and third indication information, the second indication information is used to indicate the maximum transmission power of the terminal device, and the third indication information is used to indicate the The second indication information is obtained from the correction value of the maximum output power back-off MPR and the first indication information, or indicates that the second indication information is obtained from the power management maximum output power back-off P-MPR and the first indication The information is obtained, the first indication information is used to indicate the preset transmission power of the terminal equipment, and the terminal equipment works in the frequency range 2; Determine the correction value of the MPR or the P-MPR according to the second indication information and the third indication information. 8. The method according to claim 7, wherein the first indication information is a default value known to the terminal equipment and the network equipment, or the first indication information is determined according to the power level of the frequency range 2, Alternatively, the first indication information is determined according to various combinations of carrier aggregation CA or dual connectivity DC. 9. The method according to claim 7, further comprising: Receive the first indication information. 10. The method according to claim 9, wherein the first indication information is carried in Radio Resource Control (RRC) signaling. 11. The method according to claim 10, wherein the first indication information is carried in the UE capability report of the RRC signaling. 12. The method according to any one of claims 7-11, characterized in that, determining the correction value of the MPR or the P-MPR according to the second indication information and the third indication information, include: The third indication information indicates that the second indication information is obtained by the correction value of the MPR and the first indication information, and the correction value xMPR _f,c of the MPR is calculated according to the following formula: xMPR _f,c = P _{CMAX_ref} - P _CMAX,f,c , or, The third indication information indicates that the second indication information is obtained from the P-MPR and the first indication information, and the P-MPR P-MPR _f,c is calculated according to the following formula: P-MPR _f,c = P _{CMAX_ref} - _{P CMAX,f,c} , Wherein, _{PCMAX_ref} is the first indication information, and _PCMAX,f,c is the second indication information. 13. A communication device, characterized in that it comprises: A processing module, configured to obtain second indication information according to the correction value of the maximum output power backoff MPR, one of the power management maximum output power backoff P-MPR, and the first indication information, wherein the first indication information uses In order to indicate the preset transmission power of the terminal equipment, the second indication information is used to indicate the maximum transmission power of the terminal equipment, and the terminal equipment works in the frequency range 2; A transceiver module, configured to send a power headroom report PHR, wherein the PHR includes the second indication information and third indication information, and the third indication information is used to indicate that the second indication information is provided by the The correction value of the MPR is obtained from the first indication information, or indicates that the second indication information is obtained from the P-MPR and the first indication information. 14. The apparatus according to claim 13, wherein the first indication information is a default value known to terminal equipment and network equipment, or the first indication information is determined according to the power level of frequency range 2, Alternatively, the first indication information is determined according to various combinations of carrier aggregation CA or dual connectivity DC. 15. The device according to claim 13, wherein the transceiver module is also used for: Send the first indication information. 16. The apparatus according to claim 15, wherein the first indication information is carried in radio resource control (RRC) signaling. 17. The apparatus according to claim 16, wherein the first indication information is carried in the UE capability report of the RRC signaling. 18. The device according to any one of claims 13-17, wherein the processing module is specifically used for: The second indication information P _CMAX,f,c is calculated according to the following formula: P _CMAX,f,c =P _{CMAX_ref} -MAX(xMPR _f,c ,P-MPR _f,c ), Wherein, _{PCMAX_ref} is the first indication information, xMPR _f,c is a correction value of the MPR, and P-MPR _f,c is the P-MPR. 19. A communication device, characterized in that it comprises: A transceiver module, configured to receive a power headroom report PHR, wherein the PHR includes second indication information and third indication information, the second indication information is used to indicate the maximum transmission power of the terminal device, and the third indication information The information is used to indicate that the second indication information is obtained from the correction value of the maximum output power backoff MPR and the first indication information, or indicates that the second indication information is obtained from the power management maximum output power backoff P-MPR and The first indication information is obtained, the first indication information is used to indicate the preset transmission power of the terminal equipment, and the terminal equipment works in the frequency range 2; A processing module, configured to determine a correction value of the MPR or the P-MPR according to the second indication information and the third indication information. 20. The apparatus according to claim 19, wherein the first indication information is a default value known to terminal equipment and network equipment, or the first indication information is determined according to the power level of frequency range 2, Alternatively, the first indication information is determined according to various combinations of carrier aggregation CA or dual connectivity DC. 21. The device according to claim 19, wherein the transceiver module is also used for: Receive the first indication information. 22. The apparatus according to claim 21, wherein the first indication information is carried in radio resource control (RRC) signaling. 23. The apparatus according to claim 22, wherein the first indication information is carried in the UE capability report of the RRC signaling. 24. The device according to any one of claims 19-23, wherein the processing module is specifically used for: The third indication information indicates that the second indication information is obtained by the correction value of the MPR and the first indication information, and the correction value xMPR _f,c of the MPR is calculated according to the following formula: xMPR _f,c = P _{CMAX_ref} - P _CMAX,f,c , or, The third indication information indicates that the second indication information is obtained from the P-MPR and the first indication information, and the P-MPR P-MPR _f,c is calculated according to the following formula: P-MPR _f,c = P _{CMAX_ref} - _{P CMAX,f,c} , Wherein, _{PCMAX_ref} is the first indication information, and _PCMAX,f,c is the second indication information. 25. A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer or a processor, the computer or processor is made to execute the The method described in any one of 1-6, 7-12.