Power headroom indication information reporting method, electronic device, and storage medium

Abstract

Embodiments of the present application provide a power headroom indication information reporting method, an electronic device, and a storage medium. The method comprises: receiving uplink waveform switching indication information for a bandwidth part (BWP); on the basis of waveform parameters of an uplink waveform before switching, determining power headroom indication information of the switched uplink waveform, wherein the uplink waveform before switching is different from the switched uplink waveform; and using a media access control layer control element to upload the power headroom indication information by means of the switched uplink waveform. According to the embodiments of the present application, when a waveform used by a terminal changes, power headroom control indication information is reported, thereby implementing uplink power control of a network device on the terminal, and improving the utilization rate of uplink power domain resources.

Description

Power headroom indication information reporting method, electronic device, and storage medium Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a method for reporting power headroom indication information, an electronic device, and a storage medium. Background Art

[0002] Power headroom (PH) indicates the remaining power available after a terminal device completes its current transmission. The PH report (PHR) process reports the uplink PH of the user equipment (UE) to the gNB. The gNB performs closed-loop power control based on the UE's reported PH and measured channel state information, enabling efficient uplink resource scheduling for the UE.

[0003] If the power headroom is positive, the base station can schedule more resource blocks for the terminal device during the next scheduling. If the power headroom is negative, the terminal device reports that its scheduled transmit power exceeds the maximum allowable transmit power. The maximum transmit power of a terminal device is affected by its maximum transmit power backoff. In other words, if the maximum transmit power backoff of a terminal device changes, the maximum transmit power also changes.

[0004] Currently, the uplink transmission of the new radio access technology (NR) supports two waveforms, including discrete Fourier transform-spreadorthogonal frequency division multiplexing (DFT-s-OFDM) and cyclic prefix (CP)-OFDM.

[0005] Because CP-OFDM has a higher peak-to-average power ratio than DFT-S-OFDM, the maximum transmit power should be reduced compared to DFT-S-OFDM to avoid signal distortion when the UE transmits uplink signals at maximum power. Dynamic switching between CP-OFDM and DFT-S-OFDM (e.g., based on Layer 1 / Layer 2 (L1 / L2) signaling) is beneficial and should be supported in NR. Due to the power backoff differences between the two waveforms, the gNB should ideally be aware of the expected UE power backoff changes before making dynamic switching; blindly making switching decisions is pointless. Reporting power headroom control indication information when the waveform used by the UE changes becomes a pressing issue.

[0006] Summary of the Invention

[0007] The embodiments of the present application aim to provide a method, electronic device and storage medium for reporting power headroom indication information, the purpose of which is to implement uplink power control of the terminal by the network device, improve the accuracy of the switching decision application, and enhance the utilization rate of uplink power domain resources.

[0008] An embodiment of the present application provides a method for reporting power headroom indication information, wherein the method includes:

[0009] receiving uplink waveform switching indication information for a partial bandwidth BWP;

[0010] Determining power headroom indication information of a post-switching uplink waveform based on waveform parameters of a pre-switching uplink waveform, wherein the pre-switching uplink waveform is different from the post-switching uplink waveform;

[0011] The power headroom indication information is uploaded via the post-switching uplink waveform using a medium access control layer control element.

[0012] The embodiment of the present application further provides a method for reporting power headroom indication information, wherein the method includes:

[0013] receiving an uplink signal, wherein the waveform of the uplink signal is a waveform of an uplink after switching;

[0014] determining power headroom indication information of the post-switching uplink waveform carried by the uplink signal;

[0015] determining a power headroom of the uplink waveform after the switching according to the power headroom indication information;

[0016] Uplink power control of the terminal device is performed according to the power margin.

[0017] According to an embodiment of the present application, an electronic device is provided, wherein the electronic device includes:

[0018] at least one processor;

[0019] a memory for storing at least one program;

[0020] When the at least one program is executed by the at least one processor, the at least one processor implements the power headroom indication information reporting method as described in any one of the embodiments of the present application.

[0021] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores at least one program, and the at least one program is executed by at least one processor to implement the power headroom indication information reporting method as described in any one of the embodiments of the present application.

[0022] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] FIG1 is a schematic diagram of a network architecture of a communication system used in an embodiment of the present application;

[0025] FIG2 is a flow chart of a method for reporting power headroom indication information provided by an embodiment of the present application;

[0026] 3 is a flowchart of another method for reporting power headroom indication information provided in an embodiment of the present application;

[0027] FIG4 is an example diagram of a terminal reporting process provided in an embodiment of the present application;

[0028] FIG5 is an example diagram of reporting power headroom indication information provided by an embodiment of the present application;

[0029] FIG6 is a reporting example of a media access control layer control element provided in an embodiment of the present application;

[0030] FIG7 is a timing diagram illustrating a waveform switching embodiment of the present application;

[0031] 8 is a schematic structural diagram of a power headroom indication information reporting device provided in an embodiment of the present application;

[0032] 9 is a schematic structural diagram of another power headroom indication information reporting device provided in an embodiment of the present application;

[0033] FIG10 is a schematic structural diagram of an electronic device provided in an example of the present application;

[0034] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0035] FIG12 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] It should be understood that the specific implementations described herein are only used to explain the present application and are not used to limit the present application.

[0037] In the subsequent description, suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of this application and have no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0038] FIG1 is a schematic diagram of the network architecture of a communication system used in an embodiment of the present application. Referring to FIG1 , the communication system includes a wireless access network 100 and a core network 200. The wireless access network 100 may include at least one network device (such as 110 in FIG1 ) and may also include at least one terminal device (such as at least one of 120a-120d in FIG1 ). The terminal device is connected to the access network device wirelessly, and the access network device is connected to the core network wirelessly or by wire. Terminal devices and network devices may be connected to each other by wire or by wireless. FIG1 is merely a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG1 .

[0039] A network device is a network-side device with wireless transceiver capabilities. A network device can be a device in a radio access network (RAN) that provides wireless communication capabilities for terminal devices, and is called a RAN device. For example, a network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a fifth-generation (5G) mobile communication system, a next-generation base station in a sixth-generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. It can also be a module or unit that performs some of the functions of a base station, such as a centralized unit (CU) or a distributed unit (DU). The CU implements the base station's radio resource control protocol and packet data convergence protocol (PDCP), as well as the service data adaptation protocol (SDAP). The DU implements the base station's radio link control layer and medium access control (MAC) layer, as well as some or all of the physical layer. For detailed descriptions of each of these protocol layers, refer to the relevant technical specifications of the 3rd Generation Partnership Project (3GPP). Network devices can be macro base stations, micro base stations, indoor stations, relay nodes, donor nodes, and so on.

[0040] The embodiments of the present application do not limit the specific technology and specific device form used by the network device. For ease of description, the following description uses a base station as an example of a network device.

[0041] A terminal device is a user-side device with wireless transceiver capabilities. A terminal device may also be referred to as user equipment (UE), a mobile station, or a mobile terminal. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. A terminal device can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, drone, helicopter, airplane, ship, robot, robotic arm, smart home appliance, etc. The embodiments of this application do not limit the specific technology and device form used by the terminal device. The embodiments of this application use a terminal device as an example for illustration. Base stations and terminals can be fixed or mobile. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0042] The roles of the base station and the terminal can be relative. Therefore, the base station and the terminal can be collectively referred to as a communication device. 110 in Figure 1 can be referred to as a communication device with base station functions, and 120a-120d in Figure 1 can be referred to as a communication device with terminal functions. Base stations and terminals, base stations and base stations, and terminals and terminals can communicate through authorized spectrum, unauthorized spectrum, or both. They can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, and spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communications.

[0043] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station functions. The control subsystem that includes the base station functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0044] In the embodiment of the present application, NR uplink transmission supports two waveforms, including DFT-s-OFDM and CP-OFDM. CP-OFDM is used in non-power-limited situations with more transmission capabilities, while DFT-S-OFDM is used in power-limited situations because it has a lower peak-to-average ratio characteristic, but DFT-S-OFDM only supports a single layer. Due to the difference in peak-to-average ratio, the power backoff between the two waveforms may be different, which means that the maximum transmission power P of the user equipment (UE) c,max May be different. In order to maintain the efficiency of the power amplifier (PA), it is best to introduce different uplink power control mechanisms for DFT-S-OFDM and CP-OFDM respectively, because there is a significant difference in the cubic metric (CM) between the two transmission waveforms. The UE can be configured with multiple bandwidth parts (Bandwidth Part, BWP), but the activated BWP is dynamically signaled through L1 or L1 signaling. In addition, the case with a single active BWP is prioritized. Dynamic BWP adaptation can include wide bandwdith adaptation or bandwidth part "hopping". Multiple configured BWPs can use the same or different parameter sets (numerology). Different numerologies may require separate uplink (UL) power control parameter settings, which means that the UL power control parameters can be configured per BWP.

[0045] The power headroom reporting procedure is used to provide the serving gNB with information about the difference between the nominal UE maximum transmit power and the power of the UL-SCH transmission or Sounding Reference Signal (SRS) transmission for each activated serving cell, as well as information about the difference between the nominal values.

[0046] Three different types of power headroom reports are defined in NR, Type 1, Type 2, and Type 3. In the case of carrier aggregation or dual connectivity, multiple power headroom reports can be included in a single message (medium access control layer control element). Type 1 power headroom report reflects the power headroom assuming only Physical Uplink Shared Channel (PUSCH) transmission on the carrier, and it is valid for a certain component carrier. Type 2 power headroom report is similar to Type 1, but assumes that PUSCH and Physical Uplink Control Channel (PUCCH) reporting are performed simultaneously. Type 3 power headroom report is used to handle SRS switching, that is, SRS transmission on an uplink carrier where the device is not configured to transmit PUSCH.

[0047] The UE determines whether the PH of a certain activated cell is calculated based on actual transmission or reference format according to the timing of obtaining uplink scheduling. The PH based on actual transmission is called real PH, and the one calculated based on reference format is called virtual PH. From the time the PHR is triggered until resources for PHR transmission are allocated, if there is PUSCH and SRS transmission, the terminal reports the real PHR, otherwise it reports the virtual PHR. In addition, in order to ensure the quality of UE transmitted RF indicators in different modulation modes and frequency domain positions, and to meet the electromagnetic radiation absorption ratio requirements of certain scenarios, the protocol defines Maximum Power Reduction (MPR) and Additional Maximum Power Reduction (A-MPR) to guide the UE to perform appropriate power backoff.

[0048] Currently, when a terminal reaches the trigger condition for a power headroom report (PHR), it can send the power headroom to the base station. If the power headroom is positive, the base station can schedule more resource blocks for the terminal device during the next scheduling. If the power headroom is negative, the terminal reports that its scheduled transmission power has exceeded the maximum allowed transmission power. The network equipment can adjust the terminal's uplink transmission power based on the PHR. The following uses the PHR mechanism for the terminal on the PUSCH as an example to illustrate.

[0049] If the terminal calculates the first type of PHR based on the actually transmitted PUSCH, the PHR can be determined by the following formula (1):

[0050] in, and α b,f,c(j) can be collectively referred to as the target power value, j∈{0,1,…,J-1}. When the base station is configured with multiple parameter sets indicating the values ​​of P0 and α, the terminal will determine the parameter set number used for the current PUSCH transmission based on the current transmission mode, such as initial access transmission, data scheduling transmission based on downlink control information (DCI) or data scheduling transmission based on radio resource control (RRC), and the value indicated by the sounding reference signal indication (SRI) field, thereby determining the values ​​of P0 and α. Each parameter set includes an identifier (ID) of the set, and the values ​​of P0 and α.

[0051] It is the number of resource blocks (RBs) actually occupied by PUSCH for PUSCH transmission on uplink activated BWP b of carrier f of serving cell c.

[0052] μ is the value corresponding to the subcarrier spacing (SCS) configuration.

[0053] PL b,f,c (q d ) is the terminal's reference signal index value (q d ) is used as the path loss compensation value for uplink power control.

[0054] Δ TF,b,f,c (i) It is determined based on the type of information carried by the PUSCH, such as uplink shared channel (UL-SCH) or channel state information (CSI), the location and quantity of occupied physical resources, and other factors.

[0055] f b,f,c (i, l) is the PUSCH power control adjustment status of the PUSCH transmission on carrier f of serving cell c, BWP b, on actual PUSCH transmission on carrier i. This information is indicated by the base station through the DCI, allowing the base station to adjust the PUSCH transmission power in real time based on the current transmission channel status and scheduling situation.

[0056] P CMAX,f,c (i) is the maximum transmission power configured for PUSCH transmission opportunity i on carrier f of serving cell c. The maximum output power is related to factors such as the terminal's transmission capability and the frequency band where the PUSCH is located.

[0057] Among them, the maximum transmission power P CMAX,f,c The value of (i) satisfies the following formula:

[0058] P CMAX_L,f,c ≤P CMAX,f,c ≤P CMAX_H,f,c (2)

[0059] Among them, P CMAX_L,f,c The following formula (3) is satisfied:

[0060] P CMAX_L,f,c =MIN{P EMAX,c -ΔT C,c ,(P PowerClass -ΔP PowerClass )-MAX(MAX(MPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPR c )} (3)

[0061] P CMAX_H,f,c The following formula (4) is satisfied:

[0062] P CMAX_H,f,c =MIN{P EMAX,c ,P PowerClass -ΔP PowerClass} (4)

[0063] Among them, P in the above formula (3) and formula (4) EMAX,c is the value of the information element p-MAX in the serving cell.

[0064] P PowerClass The maximum terminal power of the terminal defined at different power levels. For a terminal with power level 2 enabled, ΔP PowerClass =3dB; otherwise ΔP PowerClass =0.

[0065] In the above formula 3, ΔT IB,c represents the additional tolerance of serving cell c, ΔT C,c is a predefined value: 1.5 dB or 0. In formula (3), MPRc represents the MPR of serving cell c, and A-MPRc represents the additional maximum power backoff. The MPR values ​​for the two waveforms at power level 3 and power level 2 are shown in Tables 1 and 2, respectively.

[0066] Table 1: MPR at power level 3

[0067] Table 2: Maximum Power Reduction (MPR) at Power Level 2

[0068] In the above formula, ΔT RxSRS Whether to apply it depends on the SRS port and antenna configuration. P-MPRc indicates the maximum power fallback set to comply with regulatory requirements.

[0069] From the above formula (2), we can see that the terminal's P CMAX,f,c The value of is related to MPR, and MPR is related to the waveform of the uplink transmission adopted by the terminal. Therefore, the waveform of the uplink transmission adopted by the terminal will affect P CMAX,f,c The value of will affect the power indication information and power headroom reported by the terminal. In other words, when the waveform used by the terminal device changes, the maximum transmit power fallback of the terminal device will change, and therefore the maximum transmit power will also change, resulting in changes in the maximum transmit power and power headroom of the terminal device.

[0070] Assuming that the waveform switching command issued by the network is used as the trigger condition for the power headroom indication information, there is a time difference between the terminal receiving the waveform switching command and the actual waveform switching. After receiving the waveform switching command, the terminal starts to calculate the power headroom indication information and the waveform headroom. At this time, the waveform has not yet been switched, that is, the terminal uses the waveform 1 before the switching to calculate the power headroom indication information and the power headroom, but uses the waveform 2 after the switching to send the power headroom indication information and the power headroom. Then, the power headroom indication information and the power headroom applied by the power headroom indicated by the terminal are P CMAX,f,c The P when the base station receives the power headroom indication information and the power headroom CMAX,f,c The values ​​may not be aligned, so the power headroom reported by the terminal may have errors, for example, a large gap between the power headroom and the power headroom required by the base station. This may also cause the power headroom reported by the terminal to be unable to be used by the base station to perform uplink power control on the terminal.

[0071] In view of this, an embodiment of the present application provides a method for reporting power headroom indication information, which is used when the waveform switching occurs in the terminal, and the terminal reports the power indication information and power headroom, and sends the power indication information and power headroom information to the base station, so that the base station can perform uplink power control on the terminal.

[0072] FIG2 is a flow chart of a method for reporting power headroom indication information provided in an embodiment of the present application. The present application is applicable to situations where power headroom indication information is reported. The method can be executed by a power headroom indication information reporting device, which can be implemented in software and / or hardware and is generally integrated into a terminal device. Referring to FIG2 , the method provided in an embodiment of the present application specifically includes the following steps:

[0073] Step 110: Receive uplink waveform switching indication information for the partial bandwidth BWP.

[0074] Among them, the uplink waveform switching indication information can be information used to instruct the terminal device to perform waveform switching. After receiving the uplink waveform switching indication information, the terminal device can perform waveform switching, and can switch from the first waveform to the second waveform. It can be understood that the first waveform and the second waveform can be different types of waveforms.

[0075] In an embodiment of the present application, uplink waveform switching indication information indicating a partial bandwidth BWP may be received, and upon determining that the uplink waveform switching indication information has been received, the first waveform currently used in the uplink may be switched to a second waveform.

[0076] Step 120: Determine power headroom indication information of the uplink waveform after the handover according to waveform parameters of the uplink waveform before the handover, wherein the uplink waveform before the handover is different from the uplink waveform after the handover.

[0077] In an embodiment of the present application, the terminal device can determine the power margin indication of the uplink waveform after switching according to the uplink waveform before switching. The power margin indication may include the maximum transmission power, which may be the maximum transmission power of the uplink waveform after switching.

[0078] Step 130: Use a medium access control layer control element to upload the power headroom indication information via the uplink waveform after the handover.

[0079] Specifically, the terminal device may transmit the power headroom indication information determined by the Media Access Control (MAC) layer Control Element (CE) through the uplink waveform after the switch.

[0080] In an embodiment of the present application, by receiving uplink waveform switching indication information of the corresponding part of the bandwidth, determining the power headroom indication information based on the uplink waveform switching indication information, and reporting the power headroom indication information in the medium access control layer control element, the maximum transmission power of the power headroom indication information sent by the terminal device is aligned with the base station, which facilitates the base station to perform uplink power control on the terminal device according to the power headroom indication information, and can improve the utilization rate of the uplink power domain resources.

[0081] Further, based on the above-mentioned application embodiment, if the terminal device does not transmit uplink data during the period from receiving the uplink waveform switching indication information to the actual occurrence of waveform switching, the terminal device will not report the power headroom indication information.

[0082] Based on the above application embodiment, the power headroom indication information includes the maximum transmission power, and the maximum transmission power includes the maximum transmission power of the uplink waveform after switching.

[0083] In an embodiment of the present application, the determined power margin indication information may include a maximum transmission power, and the maximum transmission power may be the maximum transmission power of the uplink waveform after the terminal device switches the waveform. It is understandable that the maximum transmission power may be the upper limit of the transmission power that the terminal device can use when transmitting a message, and the maximum transmission power of the terminal device may be determined by the terminal device or configured by a network device. Furthermore, if the uplink waveform before switching does not support one or more parameters of the uplink waveform after switching, the mobile terminal does not report the power margin indication information of the uplink waveform after switching.

[0084] In some application embodiments, the maximum transmission power is determined based on parameters of the uplink waveform before switching, and the parameters include at least the maximum power backoff; the power headroom indication information also includes the power headroom of the uplink waveform before switching.

[0085] In an embodiment of the present application, the terminal device may determine the maximum transmission power of the uplink waveform after the switching based on the maximum power fallback corresponding to the uplink waveform before the switching, and the maximum transmission power may be used as power headroom indication information. Upon receiving the uplink waveform switching indication information, the terminal device may also determine the power headroom of the uplink waveform before the switching as the power headroom indication information.

[0086] In some application embodiments, the method further includes: determining a power headroom based on an uplink waveform before switching, wherein the power headroom represents the remaining power of the terminal device after completing the current transmission.

[0087] Specifically, the terminal device may determine the power margin of the uplink waveform before switching based on the uplink waveform before switching. The power margin may be the remaining power of the terminal device after completing the current transmission.

[0088] In this embodiment of the present application, when waveform switching occurs, the terminal can determine the maximum transmission power and power headroom based on the uplink waveform before the switch as power headroom indication information, and report the power headroom indication information. In this way, the maximum transmission power sent by the terminal is the maximum transmission power corresponding to the uplink waveform after the switch, and can be aligned with the maximum transmission power used by the base station.

[0089] In an embodiment of the application, the uplink waveform before switching includes a DFT-S-OFDM waveform, and the uplink waveform after switching includes a CP-OFDM waveform; or, the uplink waveform before switching includes a CP-OFDM waveform, and the uplink waveform after switching includes a DFT-S-OFDM waveform.

[0090] Specifically, the uplink waveform before switching and the uplink waveform after switching may be different. The uplink waveform before switching includes a DFT-S-OFDM waveform, and the uplink waveform after switching includes a CP-OFDM waveform; or, the uplink waveform before switching includes a CP-OFDM waveform, and the uplink waveform after switching includes a DFT-S-OFDM waveform, wherein the DFT-S-OFDM waveform is one of the waveforms supported by the uplink transmission of the NR system. The DFT-s-OFDM waveform supports single-layer transmission and has good demodulation performance at low modulation orders. It is suitable for uplink transmission to users at the edge of the cell and can improve uplink coverage. The CP-OFDM waveform is one of the waveforms supported by the uplink transmission of the NR system. The CP-OFDM waveform supports multi-layer transmission, can improve uplink capacity, and is suitable for uplink transmission to users in the center of the cell.

[0091] Based on the above application embodiment, the power headroom of the uplink waveform before switching is reported periodically and triggered according to a predefined event.

[0092] In an embodiment of the present application, the power headroom of the uplink waveform before switching may be periodically reported, and the power headroom of the uplink waveform before switching may be reported when an event is acquired. The event may be predefined and generated, and the event may include at least one of the following:

[0093] 1. The phr-ProhibitTimer times out or has timed out if the path loss of at least one activated cell of any MAC entity has changed by more than the phr-Tx-PowerFactorChange compared to the path loss of that cell at the time of the previous PHR transmission on this MAC.

[0094] 2. phr-PeriodicTimer timeout;

[0095] 3. When the upper layer configures or reconfigures the PHR function;

[0096] 4. Activation of a secondary cell (SCell) configured with uplink in any MAC entity;

[0097] 5. Addition or change of Primary Secondary Cell (PScell).

[0098] Based on the above application embodiment, the maximum transmission power P CMAX,f,c(i) is the maximum transmission power configured on the physical uplink shared channel transmission opportunity i on carrier f of serving cell c. The maximum transmission power P CMAX,f,c(i) The value of satisfies the following formula:

[0099] P CMAX_L,f,c ≤P CMAX,f,c ≤P CMAX_H,f,c ;

[0100] Among them, P CMAX_L,f,c Satisfies the following formula:

[0101] P CMAX_L,f,c =MIN{P EMAX,c -ΔT C,c ,(P PowerClass -ΔP PowerClass )-MAX(MAX(MPRc,A-MPRc)+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPRc)});

[0102] P CMAX_H,f,c Satisfies the following formula:

[0103] P CMAX_H,f,c =MIN{P EMAX,c ,P PowerClass -ΔP PowerClass};

[0104] Among them, P EMAX,c is the value of the information element p-MAX in the radio resource control signaling in the serving cell; PowerClass The maximum terminal power of the terminal defined at different power levels; for terminals with power level 2 enabled, ΔP PowerClass =3dB, otherwise ΔP PowerClass =0; ΔT IB,c represents the additional tolerance of serving cell c, ΔT C,c is a predefined value: 1.5dB or 0; MPRc represents the MPR of serving cell c, A-MPRc represents the additional maximum power backoff; ΔT RxSRS Indicates application indications related to the uplink sounding reference signal port and antenna configuration. P-MPRc indicates the maximum power fallback set in compliance with regulatory requirements.

[0105] In some application embodiments, the uplink waveform switching indication information is carried by at least one of the following: downlink control information, and a medium access control layer control element.

[0106] In an embodiment of the present application, the terminal device can obtain uplink waveform switching indication information for a partial bandwidth BWP through downlink control information (Downlink Control Information, DCI) or a medium access control layer control element.

[0107] In an embodiment of the present application, the method further includes: receiving first downlink control information or a medium access control layer control element, wherein the first downlink control information or the medium access control layer control element includes uplink waveform switching indication information.

[0108] In an embodiment of the present application, the network device may send a first downlink control message or a media access control layer element to the terminal device, and the first downlink control message or the media access control layer element may carry uplink waveform switching indication information, thereby instructing the terminal device to perform uplink waveform switching.

[0109] Based on the above-mentioned application embodiment, it also includes: receiving a first wireless resource control signaling, wherein the first wireless resource control signaling indicates the presence of uplink waveform switching indication information included in the downlink control information or the medium access control layer control element, and when the uplink waveform switching indication information exists, operating according to the uplink waveform switching indication information.

[0110] In an embodiment of the present application, the terminal device can also receive a first wireless resource control signaling, which can indicate whether downlink control information or information such as a medium access control layer control element has uplink waveform switching indication information. When the first wireless resource control signaling indicates that the downlink control information or the medium access control layer control element has uplink control waveform switching indication information, the terminal device can perform waveform switching. When the first wireless resource control signaling indicates that the downlink control information or the medium access control layer control element does not have uplink control waveform switching indication information, the terminal device does not perform uplink waveform switching when receiving the downlink control information or the medium access control layer control element that does not have uplink control waveform switching indication information.

[0111] Exemplarily, the network device sends a first wireless resource control signaling to the terminal device, which is used to configure the DCI or MAC CE to include indication information on whether uplink waveform switching is enabled. If the first wireless resource control signaling includes waveform enabling information, the corresponding uplink configuration DCI / MAC CE includes indication information that dynamic waveform switching is possible, such as the corresponding information bit is 1; if the first wireless resource control signaling includes waveform disabling information, the corresponding uplink configuration DCI / MAC CE includes indication information that dynamic waveform switching is not possible, such as the corresponding information bit is 0.

[0112] In some application embodiments, the method further includes: receiving a second wireless resource control signaling, wherein the second wireless resource control signaling instructs the terminal device to report power headroom indication information of the uplink waveform after switching.

[0113] In an embodiment of the present application, the terminal device may receive a second radio resource control signaling instructing the terminal device to upload power headroom indication information of the uplink waveform after the handover. The power headroom indication information may include the maximum transmission power of the uplink waveform after the handover and the power headroom of the uplink waveform before the handover.

[0114] In some application embodiments, the method further includes: sending capability information, wherein the capability information at least includes indication information indicating support for downlink control information including uplink waveform switching commands or indication information indicating support for medium access layer control elements including uplink waveform switching commands.

[0115] In an embodiment of the present application, the terminal device can send capability information, which may include indication information indicating that the terminal device supports downlink control information including uplink waveform switching commands or supports medium access layer control elements including uplink waveform switching commands. The network device can determine whether the terminal device supports downlink control information or medium access layer control elements including uplink waveform switching indication information through the capability information.

[0116] In some application embodiments, at least one of the following is further included:

[0117] The uplink waveform before switching does not have uplink data transmission and does not contain the above-mentioned power headroom indication information;

[0118] If the parameters of the uplink waveform before the handover are not suitable for the power headroom indication information of the uplink waveform after the handover, the power headroom indication information is not uploaded.

[0119] In an embodiment of the present application, if the uplink waveform of the terminal device before switching has no uplink data transmission, the power margin indication information is not uploaded. For example, if the terminal device does not transmit uplink data from the time the waveform switching command is received to the actual occurrence of the waveform switching, the terminal does not report the power margin indication information; the parameters of the uplink waveform of the terminal device before switching are not suitable for the power margin indication information of the uplink waveform after switching, and the power margin indication information is not uploaded. For example, the terminal device uses the waveform parameters of the uplink waveform before switching to calculate the maximum transmission power of the uplink waveform after switching. If the uplink waveform after switching does not support one or more parameters of the uplink waveform before switching, the terminal device does not report the power margin indication information.

[0120] In some application embodiments, the maximum transmission power of the power headroom indication information is indicated in at least one of the following ways:

[0121] Power value indication; difference indication from actual power value; index indication of power or power difference; the medium access control layer control element is indicated by the logical channel identifier LCID corresponding to the power headroom indication information.

[0122] In an embodiment of the present application, the maximum transmission power in the power headroom indication information can be indicated by one or more of the following methods: power value indication; indication of difference from actual power value; index indication of power or power difference; and indication of logical channel identifier (LCID) corresponding to the power headroom indication information through a medium access control layer control element.

[0123] For example, the maximum transmission power in the power indication information is indicated by a specific power value, such as 20dBm, or by a difference from the actual power value, such as 2dB, indicating that the maximum power after switching is 2dB higher than the actual maximum transmission power; when reporting, the UE uses the corresponding index indication, such as a 6-bit index indication for the specific power value and a 2-3-bit index indication for the power difference.

[0124] FIG3 is a flowchart of another method for reporting power headroom indication information provided in an embodiment of the present application. The present application is applicable to situations where power headroom indication information is reported. The method can be performed by a power headroom indication information reporting device. The device can be implemented in software and / or hardware and is generally integrated into a network device. Referring to FIG3 , the method provided in an embodiment of the present application specifically includes the following steps:

[0125] Step 210: Receive an uplink signal, wherein the waveform of the uplink signal is an uplink waveform after switching.

[0126] In an embodiment of the present application, the network device can receive an uplink signal uploaded by the terminal device, and the waveform of the uplink signal is a post-switching uplink waveform after the terminal device switches the waveform.

[0127] Step 220: Determine the power headroom indication information of the uplink waveform after the handover carried by the uplink signal.

[0128] Specifically, the uplink signal may carry power headroom indication information of the uplink waveform after switching, and the network device may extract the power headroom indication information, which may be used to determine the post-switching power headroom of the uplink waveform after switching.

[0129] Step 230: Perform uplink power control on the terminal device according to the power headroom indication information.

[0130] Specifically, the uplink power of the terminal device can be controlled according to the power headroom indication information of the uplink waveform after the handover, so that the uplink power of the terminal device does not exceed the power headroom of the uplink waveform after the handover, thereby improving the interest rate of the uplink power domain resources. For example, the power headroom indication information can be used to determine the power headroom of the uplink waveform of the terminal device after the handover, and the uplink power control can be performed according to the power headroom.

[0131] In some application embodiments, the power headroom indication information indicates a maximum transmission power of the uplink waveform after the handover, and the power headroom indication information also includes a power headroom of the uplink waveform before the handover.

[0132] In an embodiment of the present application, the power headroom indication information received by the network device may include the maximum transmission power of the uplink waveform after the switching and the power headroom of the uplink waveform before the switching.

[0133] In some application embodiments, the maximum transmission power is determined based on a maximum power backoff of an uplink waveform before the handover.

[0134] In an embodiment of the present application, the maximum transmission power can be determined by the terminal device according to the maximum power backoff of the uplink waveform before switching.

[0135] In some other application embodiments, the power headroom is determined based on the maximum transmission power of the uplink waveform before the handover.

[0136] Specifically, the power headroom of the uplink waveform before the handover may be determined by the maximum transmission power of the uplink waveform before the handover.

[0137] In some application embodiments, the method further includes: sending first wireless resource control information, wherein the first wireless resource control signaling indicates the presence of downlink control information or a medium access control layer control element containing uplink waveform switching indication information.

[0138] In an embodiment of the present application, a network device may send first wireless resource control information to a terminal device, and the first wireless resource control information may indicate whether the downlink control information or the medium access layer control element includes uplink waveform switching indication information. For example, if the first RRC includes waveform enabling information, the corresponding uplink configuration DCI / MAC CE includes indication information that the waveform can be dynamically switched, such as if the corresponding information bit is 1; if the first RRC includes waveform disabling information, the corresponding uplink configuration DCI / MAC CE includes indication information that the waveform cannot be dynamically switched, such as if the corresponding information bit is 0.

[0139] In some application embodiments, it also includes: receiving capability information, wherein the capability information at least includes an indication that the terminal device supports downlink control information including uplink waveform switching indication information or an indication that the terminal device supports medium access control layer control elements including uplink switching indication information.

[0140] In an embodiment of the present application, the network device may receive capability information transmitted by the terminal device, and the capability information may indicate that the terminal device supports downlink control information or that the media access control layer control element includes uplink switching indication information.

[0141] The present invention provides a method for reporting power headroom information, as shown in FIG4 . This method is used to enable a terminal to report power indication information and power headroom when waveform switching occurs, and to send the power indication information and power headroom information to a base station via the switched waveform, thereby enabling the base station to perform uplink power control on the terminal. Referring to FIG5 , the method for reporting power headroom indication information provided in the present invention includes the following steps:

[0142] S301: The terminal receives waveform switching instruction information and power headroom reporting instruction information;

[0143] Among them, the waveform switching indication information includes a first RRC signaling and a first DCI signaling, wherein the first RRC signaling indicates whether there is a waveform switching indication field in the first DCI. If there is a waveform switching indication field in the first DCI, the terminal operates according to the waveform switching indication field information in the DCI. If the above indication field indicates the presence of waveform switching, the terminal performs a waveform switching operation; the power headroom reporting indication information includes a second RRC signaling, and the second RRC signaling indicates whether the terminal reports the power headroom indication information. If the second RRC signaling indicates that the terminal needs to report the power headroom indication information. When the terminal receives the waveform switching command in the DCI, it calculates the corresponding power headroom indication information and reports it through the waveform after switching. The power headroom indication information at least includes: the maximum transmit power of the waveform after switching, and the power headroom indication information is calculated based on the waveform parameters before switching, taking into account the MPR difference between the waveforms before and after switching.

[0144] In an embodiment of the present application, the uplink waveforms before and after the switch are different waveforms. For example, the uplink waveform before the switch can be a DFT-s-OFDM waveform, and the uplink waveform after the switch can be a CP-OFDM waveform, or vice versa. In one example, the first information can indicate dynamic switching of the uplink waveform. For example, the DCI can include a 1-bit indication field indicating uplink waveform switching. When the indication field is 1, the uplink waveform dynamically switches; when the indication field is 0, the uplink waveform remains unchanged. Alternatively, the indication field can directly indicate the first uplink waveform. For example, when the indication field has a value of 1, the terminal can use CP-OFDM symbols to send uplink signals. When the uplink waveform indication field in the DCI has a value of 0, the terminal can use DFT-s-OFDM waveforms to send uplink signals. Conversely, if the uplink waveform indication field in the DCI has a value of 0, the terminal can use CP-OFDM symbols to send uplink signals. When the uplink waveform indication field in the DCI has a value of 1, the terminal can use DFT-s-OFDM symbols to send uplink signals.

[0145] In one exemplary embodiment, the uplink waveform switching may be indicated by a DCI. For example, when the first information is DCI, the first information may be uplink scheduling signaling (UL grant), and the format of the first information may be DCI format 0_0, DCI format 0_1, or DCI format 0_2. For another example, when the first information is DCI, the first information may be group-common DCI. In another possible scenario, the first information may be a media access control (MAC) CE indication.

[0146] Based on the above-mentioned application embodiment, the first information also includes a first RRC signaling, and the first RRC signaling is used to indicate whether there is waveform switching indication information in the DCI.

[0147] S302: The terminal determines the power headroom and indication information according to the first uplink waveform;

[0148] Specifically, when the DCI received by the terminal contains waveform switching indication information, the power headroom indication information of the waveform after switching is calculated based on the current (pre-switching) waveform. At the same time, the terminal calculates the power headroom before switching. It should be noted that the terminal has data transmission before the waveform switching, that is, the terminal uses the waveform before switching to upload data to the network. If there is no actual data transmission before switching, the terminal does not calculate the power headroom and power headroom indication information. The terminal calculates the maximum transmission power after switching based on the waveform parameters before switching. If the waveform after switching does not support some of the waveform parameters before switching, the terminal does not calculate the maximum transmission power after switching. When the terminal receives the waveform switching command, it can simultaneously calculate the maximum transmission power after switching and the power headroom. There is a time difference between the terminal receiving the waveform switching command and the actual waveform switching. That is, the terminal receives the waveform switching command at t1 and starts calculating the power headroom and maximum transmission power. The actual waveform switching occurs at t2 (t2>t1), and the terminal reports the power headroom and indication information at t3 (t3>t2).

[0149] S303: The terminal sends an uplink signal; correspondingly, the base station receives the uplink signal.

[0150] The uplink signal may include a reference signal, such as an SRS, or a data channel, such as a PUSCH. It should be noted that the waveform of the uplink signal in S303 is the uplink waveform after switching. For example, assuming that the uplink signal is a reference signal, the reference signal may include a sounding reference signal and a demodulation reference signal (DMRS). The waveform of the reference signal can be understood as the sequence type used by the reference signal, such as low peak-to-average power ratio (PAPR) sequence type I, low PAPR sequence type II, a Zadoff-Chu (ZC) sequence, an m-sequence, and a gold sequence. Different sequences have different PAPRs. For example, assuming that the uplink signal includes a data channel, the waveform of the data channel may be the CP-OFDM or DFT-s-OFDM shown above. The uplink signal carries power headroom and power headroom indication information. See FIG6 . The power headroom and power headroom indication information may be reported via a MAC CE. The power headroom here is the power headroom of the waveform before switching, and the power headroom indication information is the information of the waveform after switching, including the maximum transmission power.

[0151] S304: The base station performs power control according to the received information.

[0152] Specifically, the base station may determine the power headroom according to the power headroom information carried by the uplink signal in S302. Optionally, the base station may perform uplink transmission power control on the terminal based on the power headroom.

[0153] Based on the above application embodiment, the method for the terminal to determine the power headroom and the power headroom indication information is described in detail according to S301:

[0154] The terminal determines power headroom indication information according to the uplink waveform before switching and the waveform after switching; the power headroom indication information includes the maximum transmission power after switching.

[0155] The terminal can determine the maximum transmission power after the handover using formulas (3) and (4) based on the MPR corresponding to the uplink waveform after the handover, such as the MPR in Table 1 or Table 2. The other parameters in formulas (3) and (4) are determined by the waveform before the handover. In S303, the uplink signal can carry power headroom indication information.

[0156] Exemplarily, referring to FIG7 , the terminal receives the first information at t1. The first information indicates waveform switching, that is, the terminal can use a waveform different from the current waveform to send an uplink signal. For example, the terminal can use the switched waveform to send an uplink signal after the first information takes effect, that is, after t2. Assume that after t1 and before t2, the terminal calculates the power margin and the power margin indication information, and sends the power margin and indication information at t3. According to the above method, the terminal can calculate the maximum transmission power after switching based on the MPR corresponding to the uplink waveform after switching, and other parameters are determined by the waveform before switching. Subsequently, the terminal can determine the second power margin based on the second maximum transmission power. Then the terminal can send an uplink signal, such as PUSCH, at t4, and the uplink signal can carry the second power margin.

[0157] In some application embodiments, the second information received by the terminal can be used to trigger PHR reporting. For example, the second information is used to indicate the DFT-s-OFDM waveform. Before the second information takes effect, the terminal uses the CP-OFDM waveform for uplink data transmission. For another example, the second information is used to indicate the CP-OFDM waveform. Before the second information takes effect, the terminal uses the DFT-s-OFDM waveform for uplink data transmission. The terminal determines the MPR based on the waveform indicated by the second information, and then determines the maximum transmission power, so that the terminal can determine the PHR and report it to the network device. As another possible implementation method, the second information received by the terminal can be used to trigger PHR reporting. The second information is used to indicate waveform switching. The second information is DCI or MAC CE. The terminal determines the MPR based on the waveform indicated by the second information, and then determines the maximum transmission power, so that the terminal can determine the PHR and report it to the network device.

[0158] Optionally, when the sequence type used by the reference signal, that is, the uplink waveform, is dynamically indicated, the PHR corresponding to the first sequence needs to be reported. For example, at t1, the base station indicates through first information that the SRS sequence is low PAPR sequence type I. The terminal can then send the SRS using low PAPR sequence type I. At t2, which is subsequent to t1, the base station indicates through second information that the SRS sequence is an m-sequence. Assuming that the terminal determines that the PHR trigger condition is met at t3, which is subsequent to t2, when reporting the PHR, the terminal can calculate the maximum transmission power based on the second sequence, that is, the m-sequence, further calculate the PHR, and report the PHR to the base station.

[0159] Based on the above solution, when waveform switching occurs, the terminal can determine the power headroom based on the second uplink waveform, i.e., the waveform after switching, and report the power headroom. In this way, the maximum transmission power used for the power headroom sent by the terminal can be aligned with that of the base station, i.e., the maximum transmission power determined by the MPR corresponding to the second uplink waveform. In this way, the base station can also perform uplink power control on the terminal based on the power headroom sent by the terminal, which can improve the utilization of uplink power domain resources.

[0160] The terminal determines the power margin based on the uplink waveform before switching.

[0161] The terminal may determine a first maximum transmission power according to the MPR corresponding to the first uplink waveform, and determine a first power headroom according to formula (1) and the first maximum transmission power. In S202, the uplink signal may carry the first power headroom.

[0162] For example, as shown in Figure 7, the terminal receives the first information at t1. The first information indicates the CP-OFDM waveform, that is, the terminal can use the CP-OFDM waveform to send the uplink signal. At t2, the terminal receives the second information. The second information indicates the DFT-s-OFDM waveform, that is, the terminal can use the DFT-s-OFDM waveform to send the uplink signal. Exemplarily, the terminal can use the DFT-s-OFDM waveform to send the uplink signal after the second information takes effect, that is, after t3. Assume that after t2 and before t3, the terminal determines that it is necessary to calculate the power margin based on the PHR trigger condition and sends the PHR at t4. According to the above method 2, the terminal can calculate the first maximum transmission power based on the first uplink waveform, such as the MPR corresponding to the CP-OFDM waveform. Then, the terminal can determine the first power margin based on the first maximum transmission power. Then the terminal can send an uplink signal, such as PUSCH, at t4, and the uplink signal can carry the first power margin.

[0163] Optionally, when the sequence type used by the reference signal, that is, the uplink waveform, is dynamically indicated, the PHR corresponding to the first sequence needs to be reported. For example, at t1, the base station indicates through first information that the SRS sequence is low PAPR sequence type I. The terminal can then send the SRS using low PAPR sequence type I. At t2, after t1, the base station indicates through second information that the SRS sequence is an m-sequence. Assuming that the terminal determines that the PHR trigger condition is met at t3, after t2, when reporting the PHR, the terminal can calculate the maximum transmission power based on the first sequence, that is, low PAPR sequence type I, further calculate the PHR, and report the PHR to the base station.

[0164] FIG8 is a schematic diagram of the structure of a power headroom indication information reporting device provided in an embodiment of the present application. The device can execute the power headroom indication information reporting method provided in any embodiment of the present application and has the corresponding functional modules and beneficial effects of the execution method. The device can be implemented by software and / or hardware. As shown in FIG8, the device provided in an embodiment of the present application specifically includes:

[0165] The switching instruction module 401 is configured to receive uplink waveform switching instruction information for a partial bandwidth BWP.

[0166] The indication information module 402 is configured to determine power headroom indication information of a post-switching uplink waveform according to waveform parameters of a pre-switching uplink waveform, wherein the pre-switching uplink waveform is different from the post-switching uplink waveform.

[0167] The indication uploading module 403 is configured to upload the power headroom indication information via a post-switching uplink waveform using a medium access control layer control element.

[0168] In some application embodiments, the in-device power headroom indication information includes a maximum transmission power, and the maximum transmission power includes a maximum transmission power of the uplink waveform after the handover.

[0169] In some application embodiments, the maximum transmission power within the device is determined based on parameters of the uplink waveform before switching, and the parameters include at least maximum power backoff; the power headroom indication information also includes the power headroom of the uplink waveform before switching.

[0170] In some application embodiments, the power headroom of the uplink waveform before intra-device handover is reported periodically and triggered by a predefined event.

[0171] In some embodiments of the application, the maximum transmission power P in the device CMAX,f,c(i) is the maximum transmission power configured on the physical uplink shared channel transmission opportunity i on carrier f of serving cell c. The maximum transmission power P CMAX,f,c(i) The value of satisfies the following formula:

[0172] P CMAX_L,f,c ≤P CMAX,f,c ≤P CMAX_H,f,c ;

[0173] Among them, P CMAX_L,f,c Satisfies the following formula:

[0174] P CMAX_L,f,c =MIN{P EMAX,c -ΔT C,c ,(P PowerClass -ΔP PowerClass )-MAX(MAX(MPRc,A-MPRc)+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPRc)});

[0175] P CMAX_H,f,c Satisfies the following formula:

[0176] P CMAX_H,f,c =MIN{P EMAX,c ,P PowerClass -ΔP PowerClass};

[0177] Among them, P EMAX,c is the value of the information element p-MAX in the radio resource control signaling in the serving cell; PowerClass The maximum terminal power of the terminal defined at different power levels; for terminals with power level 2 enabled, ΔP PowerClass =3dB, otherwise ΔP PowerClass =0; ΔT IB,c represents the additional tolerance of serving cell c, ΔT C,c is a predefined value: 1.5dB or 0; MPRc represents the MPR of serving cell c, A-MPRc represents the additional maximum power backoff; ΔT RxSRS Indicates application indications related to the uplink sounding reference signal port and antenna configuration. P-MPRc indicates the maximum power fallback set in compliance with regulatory requirements.

[0178] In some application embodiments, the apparatus further includes: a power headroom module, configured to determine the power headroom based on the uplink waveform before switching, wherein the power headroom represents the remaining power of the terminal device after completing the current transmission.

[0179] In some application embodiments, the uplink waveform before the intra-device handover includes a DFT-S-OFDM waveform, and the uplink waveform after the handover includes a CP-OFDM waveform; or, the uplink waveform before the handover includes a CP-OFDM waveform, and the uplink waveform after the handover includes a DFT-S-OFDM waveform.

[0180] In some application embodiments, the apparatus further includes: a second signaling module for receiving a second wireless resource control signaling, wherein the second wireless resource control signaling instructs the terminal device to report power headroom indication information of the uplink waveform after the switch.

[0181] In some application embodiments, the device also includes: an information receiving module, used to receive first downlink control information or a media access control layer control element, wherein the first downlink control information or the media access control layer control element includes uplink waveform switching indication information.

[0182] In some application embodiments, the device also includes: a capability information module for sending capability information, wherein the capability information at least includes an indication of supporting downlink control information including uplink waveform switching indication information or supporting medium access layer control elements including uplink waveform switching indication information.

[0183] In some application embodiments, the device also includes: other processing modules, used for at least one of the following: if the uplink waveform before switching has no uplink data transmission, the power headroom indication information is not uploaded; if the parameters of the uplink waveform before switching are not suitable for the power headroom indication information of the uplink waveform after switching, the power headroom indication information is not uploaded.

[0184] In some application embodiments, the maximum transmission power of the intra-device power headroom indication information is indicated in at least one of the following ways:

[0185] Power value indication; difference indication from actual power value; index indication of power or power difference; logical channel identifier LCID indication corresponding to power headroom indication information of medium access control layer control element.

[0186] FIG9 is a schematic diagram of the structure of another power headroom indication information reporting device provided in an embodiment of the present application. The device can execute the power headroom indication information reporting method provided in any embodiment of the present application and has the corresponding functional modules and beneficial effects of the execution method. The device can be implemented by software and / or hardware. As shown in FIG9, the device provided in an embodiment of the present application specifically includes:

[0187] The signal receiving module 501 is configured to receive an uplink signal, wherein the waveform of the uplink signal is a waveform of an uplink after switching.

[0188] The headroom indication module 502 is configured to determine the power headroom indication information of the post-switching uplink waveform carried by the uplink signal.

[0189] The power control module 503 is used to perform uplink power control on the terminal device according to the power headroom indication information.

[0190] Based on the above application embodiment, the power headroom indication information within the device indicates the maximum transmission power of the uplink waveform after the handover, and the power headroom indication information also includes the power headroom of the uplink waveform before the handover.

[0191] Based on the above application embodiment, the maximum transmission power within the device is determined according to the maximum power backoff of the uplink waveform before switching.

[0192] Based on the above-mentioned application embodiment, the power headroom within the device is determined according to the maximum transmission power of the uplink waveform before the handover.

[0193] Based on the above-mentioned application embodiment, the device also includes: a first information sending module, used to send first wireless resource control information, wherein the first wireless resource control signaling indicates the presence of downlink control information or medium access control layer control elements containing uplink waveform switching indication information.

[0194] Based on the above-mentioned application embodiment, the device also includes: a capability receiving module for receiving capability information, wherein the capability information at least includes an indication that the terminal device supports downlink control information including uplink waveform switching indication information or an indication that the terminal device supports medium access control layer control elements including uplink switching indication information.

[0195] Figure 10 is a structural diagram of an electronic device provided in an example of the present application, which includes a processor 10 and a memory 11; the number of processors 10 in the electronic device can be one or more, and Figure 10 takes one processor 10 as an example; the processor 10 and the memory 11 in the electronic device can be connected via a bus or other means, and Figure 10 takes the connection via a bus as an example.

[0196] The memory 11, as a computer-readable storage medium, can be used to store software programs, computer executable programs, and modules, such as the modules corresponding to the apparatus in the embodiments of the present application (the switching instruction module 401, the instruction information module 402, and the instruction upload module 403, or the signal receiving module 501, the remaining power indication module 502, and the power control module 503). The processor 10 executes the software programs, instructions, and modules stored in the memory 11 to execute various functional applications and data processing of the electronic device, that is, to implement the above-mentioned method.

[0197] The memory 11 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created based on the use of the electronic device, etc. In addition, the memory 11 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 non-volatile solid-state storage device. In some instances, the memory 11 may further include a memory remotely located relative to the processor 10, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0198] FIG11 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. Referring to FIG11 , the communication device may include a processor 510, a memory 520, and a transceiver 530. The processor 510, the memory 520, and the transceiver 530 are connected via a bus, wherein the processor 510 executes various functional applications and data processing of the electronic device by running the software programs, instructions, and modules stored in the memory 520, that is, implementing the above-mentioned method. The memory 520 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required for at least one function; the data storage area may store data created according to the use of the communication device, etc. The transceiver 530 may communicate and exchange with other communication devices or base stations through wireless signals to realize data exchange between different electronic devices.

[0199] Exemplarily, the communication device 500 may be a chip or a chip system. Optionally, in an embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. The communication device 500 may include at least one processor 510, and the communication device 500 may also include at least one memory 520 for storing computer programs, program instructions and / or data. The memory 520 is coupled to the processor 510. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, for information exchange between devices, units or modules. The processor 510 may operate in conjunction with the memory 520. The processor 510 may execute a computer program stored in the memory 520. Optionally, the at least one memory 520 may also be integrated with the processor 510;

[0200] Optionally, in actual applications, the communication device 500 may include or exclude the transceiver 530 and the memory 520, as illustrated by a dashed box in the figure. The communication device 500 can exchange information with other devices via the transceiver 530. The transceiver 530 can be a circuit, a bus, a transceiver, or any other device capable of exchanging information.

[0201] In one possible implementation, the communication device 500 can be applied to the aforementioned terminal device or the aforementioned network device. The memory 520 stores the necessary computer program, program instructions, and / or data for implementing the power headroom indication information reporting method in any of the above embodiments. The processor 510 can execute the computer program stored in the memory 520 to perform the method in any of the above embodiments.

[0202] The specific connection medium between the transceiver 530, processor 510, and memory 520 is not limited in the embodiments of the present application. In FIG. 5 , the memory 520, processor 510, and transceiver 530 are connected via a bus. The bus is represented by a bold line in FIG. The connection between other components is for illustrative purposes only and is not intended to be limiting. Buses can be classified as address buses, data buses, control buses, etc. For ease of illustration, FIG. 5 uses only a single bold line, but this does not imply a single bus or type of bus. In the embodiments of the present application, the processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application can be directly implemented by a hardware processor or executed by a combination of hardware and software modules within the processor.

[0203] In an embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random access memory (RAM). The memory may also be any other medium that can be used to carry or store 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 in an embodiment of the present application may also be a circuit or any other device that can implement a storage function, for storing computer programs, program instructions and / or data.

[0204] FIG12 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. Referring to FIG12 , another embodiment of the present application also provides another communication device 600, comprising: an interface circuit 610 and a logic circuit 620; the interface circuit 610 can be understood as an input / output interface and can be used to perform the same operating steps as the transceiver shown in FIG11 , which is not described in detail herein. The logic circuit 620 can be used to execute the code instructions to execute the method in any of the above embodiments and can be understood as the processor in FIG11 , which can implement the same functions as the processing unit or processor, which is not described in detail herein.

[0205] Based on the above embodiments, the present application further provides a readable storage medium storing instructions. When the instructions are executed, the method for reporting power headroom indication information in any of the above embodiments is implemented. The readable storage medium may include a USB flash drive, a mobile hard drive, a read-only memory, a random access memory, a magnetic disk, or an optical disk, among other media capable of storing program code.

[0206] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, portable compact disk read-only memory (CD-ROM), optical storage, etc.) containing computer-usable program code; the present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0207] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, and the instruction device implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram. These computer program instructions may also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0208] An embodiment of the present application further provides a storage medium containing computer-executable instructions. When the computer-executable instructions are executed by a computer processor, the computer-executable instructions are used to perform a method for reporting power headroom indication information. The method includes:

[0209] receiving uplink waveform switching indication information for a partial bandwidth BWP;

[0210] Determining power headroom indication information of a post-switching uplink waveform based on waveform parameters of a pre-switching uplink waveform, wherein the pre-switching uplink waveform is different from the post-switching uplink waveform;

[0211] The power headroom indication information is uploaded via a post-switching uplink waveform using a medium access control layer control element.

[0212] or,

[0213] The computer executable instructions, when executed by a computer processor, are used to perform a method for reporting power headroom indication information, the method further comprising:

[0214] receiving an uplink signal, wherein the waveform of the uplink signal is a waveform of an uplink after switching;

[0215] determining power headroom indication information of the post-switching uplink waveform carried by the uplink signal;

[0216] Perform uplink power control on the terminal device according to the power headroom indication information.

[0217] Through the above description of the implementation methods, those skilled in the art can clearly understand that the present application can be implemented with the help of software and necessary general-purpose hardware, and of course it can also be implemented with hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0218] It is worth noting that in the embodiment of the above-mentioned device, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application.

[0219] Those skilled in the art will appreciate that all or some of the steps, devices, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, or appropriate combinations thereof.

[0220] In a hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. The corresponding software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or temporary media). As is well known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media includes, but is not limited to, RAM, ROM, electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media generally contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. A method for reporting power headroom indication information, applied to a terminal device, the method comprising: Receiving uplink waveform switching indication information for a partial bandwidth BWP; Determining power headroom indication information of a post-switching uplink waveform according to waveform parameters of a pre-switching uplink waveform, wherein the pre-switching uplink waveform is different from the post-switching uplink waveform; The power headroom indication information is uploaded via the post-switching uplink waveform using a medium access control layer control element.

2. The method according to claim 1, wherein: The power headroom indication information includes a maximum transmission power, and the maximum transmission power includes a maximum transmission power of the uplink waveform after the switching.

3. The method according to claim 2, wherein: The maximum transmission power is determined according to the parameters of the uplink waveform before switching, and the parameters at least include a maximum power fallback MPR; the power headroom indication information also includes the power headroom of the uplink waveform before switching.

4. The method according to claim 3, wherein: The power headroom of the uplink waveform before switching is reported periodically and triggered according to a predefined event.

5. The method according to claim 2, wherein: The maximum transmission power P CMAX,f,c(i) is the maximum transmission power configured on the physical uplink shared channel transmission opportunity i on carrier f of serving cell c. The maximum transmission power P CMAX,f,c(i) The value of satisfies the following formula: CMAX_L,f,c ≤P CMAX,f,c ≤P CMAX_H,f,c ; Among them, P CMAX_L,f,c Satisfies the following formula: P CMAX_L,f,c =MIN{P EMAX,c -ΔT C,c ,(P PowerClass -ΔP PowerClass )- MAX(MAX(MPRc,A-MPRc)+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPRc)}); P CMAX_H,f,c Satisfies the following formula: P CMAX_H,f,c =MIN{P EMAX,c ,P PowerClass -ΔP PowerClass }; Among them, P EMAX,c is the value of the information element p-MAX in the radio resource control signaling in the serving cell; PowerClass is the maximum terminal power of the terminal defined at different power levels; for terminals enabling power level 2, ΔP PowerClass =3dB, otherwise ΔP PowerClass =0; ΔT IB,c represents the additional tolerance of the serving cell c, ΔT C,c is a predefined value: 1.5 dB or 0; MPRc represents the MPR of the serving cell c, A-MPRc represents the additional maximum output power backoff; ΔT RxSRS Indicates application indications related to uplink sounding reference signal ports and antenna configurations. P-MPRc indicates the maximum output power fallback set in accordance with regulatory requirements.

6. The method according to claim 3, further comprising: The power margin is determined based on the uplink waveform before switching, wherein the power margin represents the remaining power after the terminal device completes the current transmission.

7. The method according to claim 1, wherein: The uplink waveform before switching includes a discrete Fourier transform spread spectrum orthogonal frequency division multiplexing DFT-S-OFDM waveform, and the uplink waveform after switching includes a cyclic prefix orthogonal frequency division multiplexing CP-OFDM waveform; or, the uplink waveform before switching includes a CP-OFDM waveform, and the uplink waveform after switching includes a DFT-S-OFDM waveform.

8. The method according to claim 1, wherein: The uplink waveform switching indication information is carried by at least one of the following: downlink control information, the medium access control layer control element.

9. The method according to claim 1, further comprising: Receive a first radio resource control signaling, wherein the first radio resource control signaling indicates a presence of the uplink waveform switching indication information included in the downlink control information or the medium access control layer control element, and when the presence is that the uplink waveform switching indication information exists, perform an operation according to the uplink waveform switching indication information.

10. The method according to claim 1, further comprising: Receive a second wireless resource control signaling, wherein the second wireless resource control signaling instructs the terminal device to report power headroom indication information of the uplink waveform after the switch.

11. The method according to claim 1, further comprising: The first downlink control information or the medium access control layer control element is received, wherein the first downlink control information or the medium access control layer control element includes the uplink waveform switching indication information.

12. The method according to claim 1, further comprising: The capability information is sent, wherein the capability information at least includes an indication that the downlink control information is supported to include the uplink waveform switching indication information or the medium access layer control element is supported to include the uplink waveform switching indication information.

13. The method according to claim 1, further comprising at least one of the following: The uplink waveform before switching has no uplink data transmission and does not upload the power headroom indication information; The parameters of the uplink waveform before the switching are not suitable for the power headroom indication information of the uplink waveform after the switching, and the power headroom indication information is not uploaded.

14. The method according to claim 1, wherein: The indication method of the maximum transmission power of the power headroom indication information includes at least one of the following: Power value indication; Indication of difference from actual power value; Index indication of power or power difference; The medium access control layer control element is indicated by a logical channel identifier LCID corresponding to the power headroom indication information.

15. A method for reporting power headroom indication information, applied to a network device, the method comprising: receiving an uplink signal, wherein the waveform of the uplink signal is a switched uplink waveform; Determining power headroom indication information of the post-switching uplink waveform carried by the uplink signal; The uplink power of the terminal device is controlled according to the power headroom indication information.

16. The method according to claim 15, wherein: The power headroom indication information indicates the maximum transmission power of the uplink waveform after the switching, and the power headroom indication information also includes the power headroom of the uplink waveform before the switching.

17. The method according to claim 16, wherein: The maximum transmission power is determined according to a maximum output power backoff of the pre-switching uplink waveform.

18. The method according to claim 15, wherein: The power headroom is determined according to a maximum transmission power of the pre-switching uplink waveform.

19. The method according to claim 15, further comprising: A first radio resource control signaling is sent, wherein the first radio resource control signaling indicates the presence of downlink control information or a medium access control layer control element including uplink waveform switching indication information.

20. The method according to claim 15, further comprising: Receive capability information, wherein the capability information at least includes an indication that the terminal device supports downlink control information including uplink waveform switching indication information or indicates that the terminal device supports medium access control layer control elements including uplink switching indication information.

21. An electronic device, comprising: at least one processor; A memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the power headroom indication information reporting method as described in any one of claims 1-20.

22. A computer-readable storage medium storing at least one program, wherein the at least one program is executed by at least one processor to implement the power headroom indication information reporting method according to any one of claims 1 to 20.

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