WO2024051734A1

WO2024051734A1 - Capability reporting method and communication apparatus

Info

Publication number: WO2024051734A1
Application number: PCT/CN2023/117226
Authority: WO
Inventors: 韩成成; 郭志恒; 谢信乾; 龙毅
Original assignee: 华为技术有限公司
Priority date: 2022-09-07
Filing date: 2023-09-06
Publication date: 2024-03-14
Also published as: CN117676782A

Abstract

The present application provides a capability reporting method and a communication apparatus. The capability reporting method comprises: a terminal device receives a capability query request from a network device, the capability query request being used for acquiring capability information of the terminal device, and the capability information being used for indicating a power gain, wherein the power gain is used for indicating a power variation of the terminal device after switching from a first waveform to a second waveform; and the terminal device sends a response message to the network device, the response message comprising the capability information. By means of the capability reporting method, the terminal device reports the capability information thereof in response to the query request from the network device, such that the terminal device can perform waveform switching according to the capability information thereof in a waveform switching process, thereby ensuring the uplink coverage performance of the terminal device.

Description

A capability reporting method and communication device

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 7, 2022, with application number 202211088271.8 and the application title "A capability reporting method and communication device", the entire content of which is incorporated by reference. in this application.

Technical field

The present application relates to the field of communication technology, and in particular, to a capability reporting method and a communication device.

Background technique

Waveforms in orthogonal frequency division multiplexing (OFDM) systems usually include two waveforms: cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform and discrete Fourier transform spread spectrum Orthogonal frequency division multiplexing (discrete fourier transform spread OFDM, DFT-S-OFDM) waveform. Among them, the CP-OFDM waveform can flexibly use frequency domain resources and support multi-user space division multiplexing; however, the CP-OFDM waveform may limit the uplink transmission power of the terminal equipment and reduce the cell coverage. The DFT-S-OFDM waveform is beneficial to improving cell coverage; however, the DFT-S-OFDM waveform can only use continuous frequency domain resources and does not support multi-user space division multiplexing.

In order to meet the adaptability of the waveform and cell coverage performance, it is usually necessary to perform dynamic waveform switching on the terminal equipment, that is, instruct the waveform used by the terminal equipment to switch between the CP-OFDM waveform and the DFT-S-OFDM waveform. How to ensure uplink coverage performance during the waveform switching process is an urgent problem to be solved.

Contents of the invention

The capability reporting method and communication device provided by embodiments of the present application can improve the uplink coverage performance of terminal equipment during waveform switching.

In the first aspect, embodiments of the present application provide a capability reporting method. In this method, a terminal device receives a capability query request from a network device. The capability query request is used to obtain capability information of the terminal device. The capability information is used to indicate Power gain; wherein the power gain is used to indicate the power change amount of the terminal device after switching from the first waveform to the second waveform. Further, the terminal device sends a response message to the network device, where the response message includes the capability information.

Based on the method provided in the first aspect, the terminal device indicates to the network device its power gain after switching from the first waveform to the second waveform. During the waveform switching stage, the terminal device can perform effective waveform switching based on its own capability information, thereby ensuring The uplink coverage performance of the terminal equipment.

In a possible implementation, the response message also includes first information, the first information is used to indicate the modulation and coding strategy MCS of the second waveform corresponding to the capability information, and/or the first information is used to indicate Indicates the number of resource blocks RB corresponding to the capability information. By implementing this possible implementation manner, the accuracy of capability information reported by the terminal device can be improved.

In the second aspect, embodiments of the present application provide a power headroom PH reporting method. In this method, the terminal device receives a first message from the network device. The first message includes an identifier of the third waveform; wherein the first message is Instructing to report the first power headroom report PHR corresponding to the third waveform, the first PHR is used to indicate the first PH, the first PH is determined based on the maximum transmission power of the terminal device using the third waveform; further, The terminal device sends the first PHR to the network device at the first moment.

Based on the method provided in the second aspect, the terminal device reports the power headroom report corresponding to the specified waveform according to the instructions of the network device, so that during the waveform switching process, the network device can perform resource allocation or power allocation based on the power headroom report, thereby Improve the uplink coverage performance of the terminal equipment.

In a possible implementation, the terminal device uses a third waveform at the first moment; or the terminal device uses a fourth waveform at the first moment, and the fourth waveform is different from the third waveform. By implementing this possible implementation, the terminal device can report the power headroom corresponding to the waveform at the current moment according to the instructions of the network device, so that the network device can adjust the resources corresponding to the terminal device in real time according to the power headroom at the current moment; or, the terminal The device can also report the power margin corresponding to the waveform after the waveform switching before the waveform switching according to the instructions of the network device. This allows the network device to know in advance the situation after the waveform switching of the terminal device and prepare in advance to save time in resource adjustment.

In a possible implementation, during the use of the fourth waveform, the terminal device receives a first message from the network device, the first message is used to instruct to report the first power headroom report corresponding to the third waveform at the first moment. PHR; the first PHR is used to indicate the first PH; the first PH is determined based on the maximum transmit power of the terminal device using a third waveform, which is different from the fourth waveform. The terminal device sends the first PHR to the network device at the first moment.

In a possible implementation, the first PH is the difference between the maximum transmit power corresponding to the third waveform configured by the terminal device and the estimated transmit power of the terminal device at the first moment, and the estimated transmit power at the first moment It is determined based on the resource configuration information at the first moment.

In a possible implementation, the first PHR includes second information, the second information is used to indicate the first PH; or, the second information Used to indicate the amount of change between the first PH and the second PH indicated by the second PHR, where the second PHR and the first PHR are PHRs sent adjacently, and the sending time of the second PHR is before the first time. . Through this possible implementation, the terminal device can directly indicate the first PH through the first PHR to save computing resources of the network device; or, the terminal device can directly indicate the conversion amount of the first PH through the first PHR. Indirectly indicates the first PH, thereby reducing the amount of data transmission.

In a third aspect, embodiments of the present application provide a power headroom PH reporting method. In this method, during communication using the first waveform, the terminal device receives a second message and a third message from the network device. The second message The third message is used to indicate switching from the first waveform to the second waveform. The third message is used to indicate reporting of the third power headroom report PHR corresponding to the second waveform. The third PHR is used to indicate the third PH. The third PH It is determined based on the maximum transmit power of the terminal device using the second waveform. Further, the terminal device sends a third PHR to the network device at a second time, and the second time is during communication using the second waveform.

Based on the method provided in the third aspect, the terminal device reports a power headroom report after waveform switching, so that the network device can adjust resource allocation in real time based on the power headroom report, thereby improving the uplink coverage of the terminal device.

In a possible implementation, the third PH is the difference between the maximum transmit power corresponding to the second waveform configured by the terminal device and the estimated transmit power value of the terminal device at the second moment. The estimated transmit power value at the second moment is Determined based on the resource configuration information at the second moment.

In a possible implementation, the second message and the third message are the same message. By implementing this possible method, the terminal device can be instructed to perform waveform switching and report a power headroom report in the same message, which can save communication resources.

In a possible implementation, the third PHR includes third information, and the third information is used to indicate the third PH; or, the third information is used to indicate one of the third PH and the fourth PH indicated by the fourth PHR. The amount of change between; wherein, the fourth PHR and the third PHR are PHRs sent adjacently, and the sending time of the fourth PHR is before the second time. Through this possible implementation, the terminal device can directly indicate the third PH through the third PHR to save computing resources of the network device; or, the terminal device can directly indicate the conversion amount of the third PH through the third PHR. Indirectly indicates the third PH, thereby reducing the amount of data transmission.

In a possible implementation, the terminal device sends M PHRs to the network device at M times after the second time, where M is an integer greater than or equal to 0; wherein the PHR sent at the third time is used to indicate the th PH at three moments: the third moment is one of M moments; the difference between the PH at the third moment and the PH at the fourth moment is greater than or equal to the first threshold, and/or, the third moment and the fourth moment The time interval between them is greater than or equal to the second threshold; the fourth time and the third time are adjacent times of sending PHR, and the fourth time is before the third time. By implementing this possible implementation manner, the terminal device reports one or more power headroom reports to the network device after waveform switching, thereby improving the accuracy of the power headroom indicated by the terminal device.

In the fourth aspect, embodiments of the present application provide a capability receiving method. In this method, the network device sends a capability query request to the terminal device. The capability query request is used to obtain capability information, and the capability information is used to indicate power gain; wherein , the power gain is used to indicate the power change amount of the terminal device after switching from the first waveform to the second waveform; further, the network device receives a response message from the terminal device, where the response message includes capability information.

Based on the method provided in the fourth aspect, the beneficial effects thereof can be referred to the beneficial effects of the method provided in the first aspect, and the repeated parts will not be described again.

In a possible implementation, the response message also includes first information, the first information is used to indicate the modulation and coding strategy MCS of the second waveform corresponding to the capability information, and/or the first information is used to indicate Indicates the number of resource blocks RB corresponding to the capability information.

In a possible implementation, if the power gain is greater than or equal to the third threshold, the network device sends waveform switching signaling to the terminal device, where the waveform switching signaling is used to indicate switching from the first waveform to the second waveform.

In the fifth aspect, embodiments of the present application provide a power headroom PH receiving method. In this method, the network device sends a first message to the terminal device, where the first message includes an identifier of the third waveform; wherein the first message is The first power headroom report PHR corresponding to the third waveform is instructed to be reported; the first PHR is used to indicate the first PH; the first PH is determined based on the maximum transmit power of the terminal device using the third waveform. The network device receives the first PHR from the terminal device at the first moment.

Based on the method provided in the fifth aspect, the beneficial effects thereof can be referred to the beneficial effects of the method provided in the second aspect, and the repeated parts will not be described again.

In a possible implementation, the terminal device uses a third waveform at the first moment; or the terminal device uses a fourth waveform at the first moment, and the fourth waveform is different from the third waveform.

In a possible implementation, while the terminal device uses the fourth waveform, the network device sends a first message to the terminal device, where the first message is used to indicate reporting the first power headroom corresponding to the third waveform at the first moment. Report PHR; the first PHR is used to indicate the first PH; the first PH is determined based on the maximum transmit power of the terminal device using a third waveform, and the third waveform is different from the fourth waveform. The network device receives the first PHR from the terminal device at the first moment.

In a possible implementation, the first PH is the maximum transmit power corresponding to the third waveform configured by the terminal equipment and the terminal equipment in The difference between the estimated transmit power values at the first moment, where the estimated transmit power value at the first moment is determined based on the resource configuration information at the first moment.

In a possible implementation, the first PHR includes second information, the second information is used to indicate the first PH; or, the second information is used to indicate one of the first PH and the second PH indicated by the second PHR. The amount of change between the two PHRs, where the second PHR and the first PHR are PHRs sent adjacently, and the sending time of the second PHR is before the first time.

In the sixth aspect, embodiments of the present application provide a power headroom PH receiving method. In this method, during the terminal device using the first waveform communication, the network device sends a second message and a third message to the terminal device. The second message The message is used to indicate switching from the first waveform to the second waveform. The third message is used to indicate reporting the third power headroom report PHR corresponding to the second waveform. The third PHR is used to indicate the third PH. The third PH It is determined based on the maximum transmit power of the terminal device using the second waveform. The network device receives the third PHR from the terminal device at a second time, and the second time is during communication using the second waveform by the terminal device.

Based on the method provided in the sixth aspect, the beneficial effects thereof can be referred to the beneficial effects of the method provided in the third aspect, and the repeated points will not be described again.

In a possible implementation, the second message and the third message are the same message.

In a possible implementation, the third PHR includes third information, and the third information is used to indicate the third PH; or, the third information is used to indicate one of the third PH and the fourth PH indicated by the fourth PHR. The amount of change between; wherein, the fourth PHR and the third PHR are PHRs sent adjacently, and the sending time of the fourth PHR is before the second time.

In a possible implementation, the network device receives M PHRs from the terminal device at M times after the second time, where M is an integer greater than or equal to 0; wherein the PHR sent at the third time is used to indicate PH at the third moment; the third moment is one of the M moments; the difference between the PH at the third moment and the PH at the fourth moment is greater than or equal to the first threshold, and/or, the difference between the third moment and the PH at the fourth moment The time interval between the four moments is greater than or equal to the second threshold; the fourth moment and the third moment are adjacent moments when the PHR is sent, and the fourth moment is before the third moment.

In a seventh aspect, the present application provides a communication device, which may be a device in a terminal device, or a device that can be used in conjunction with the terminal device. The communication device may also be a chip system. The communication device can perform the methods described in the first to third aspects. The functions of the communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions. The unit may be software and/or hardware. The operations and beneficial effects performed by the communication device can be referred to the methods and beneficial effects described in the above first to third aspects, and repeated details will not be described again.

In an eighth aspect, the present application provides a communication device, which may be a device in a network device, or a device that can be used in conjunction with the network device. The communication device may also be a chip system. The communication device can perform the methods described in the fourth to sixth aspects. The functions of the communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions. The unit may be software and/or hardware. The operations and beneficial effects performed by the communication device can be referred to the methods and beneficial effects described in the fourth aspect to the sixth aspect, and repeated descriptions will not be repeated.

In a ninth aspect, the present application provides a communication device, which may be the terminal device in the above method embodiment, or a chip provided in the terminal device. The communication device includes a communication interface and a processor, and optionally, a memory. The memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface. When the processor executes the computer program or instructions, the communication device causes the communication device to perform the method performed by the terminal device in the above method embodiment.

In a tenth aspect, the present application provides a communication device. The communication device may be the network device in the above method embodiment, or a chip provided in the network device. The communication device includes a communication interface and a processor, and optionally, a memory. The memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface. When the processor executes the computer program or instructions, the communication device causes the communication device to perform the method performed by the network device in the above method embodiment.

In an eleventh aspect, the present application provides a computer-readable storage medium, which is used to store computer-executable instructions. When the computer-executable instructions are executed, the results described in the first to third aspects are The method executed by the terminal device in the method is realized; or, the method executed by the network device in the method described in the fourth to sixth aspects is realized.

In a twelfth aspect, the present application provides a computer program product including a computer program. When the computer program is executed, the method executed by the terminal device in the methods described in the first to third aspects is realized; or, The method executed by the network device in the methods described in the fourth to sixth aspects is implemented.

In a thirteenth aspect, the present application provides a communication system, which includes a communication device corresponding to the above network device and a communication device corresponding to the terminal device.

Description of the drawings

Figure 1 is a schematic diagram of a system architecture provided by this application;

Figure 2 is a schematic flow chart of a capability reporting method provided by this application;

Figure 3 is a schematic flow chart of a power headroom reporting method provided by this application;

Figure 4a is a schematic diagram of a PH reporting format provided by this application;

Figure 4b is a schematic diagram of another PH reporting format provided by this application;

Figure 4c is a schematic diagram of another PH reporting format provided by this application;

Figure 5 is a schematic flow chart of another power headroom reporting method provided by this application;

Figure 6 is a schematic flow chart of another power headroom reporting method provided by this application;

Figure 7 is a schematic structural diagram of a communication device provided by the present application;

Figure 8 is a schematic structural diagram of another communication device provided by this application.

Detailed ways

Specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The terms "first" and "second" in the description, claims and drawings of this application are used to distinguish different objects, rather than describing a specific sequence. Furthermore, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or units inherent to such processes, methods, products or devices.

Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

In this application, "at least one (item)" means one or more, "plurality" means two or more, "at least two (items)" means two or three and three Above, "and/or" is used to describe the relationship between associated objects, indicating that there can be three relationships. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist simultaneously. In this case, A and B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. “At least one of the following” or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c" ”, where a, b, c can be single or multiple.

In order to better understand the embodiments of this application, the system architecture involved in the embodiments of this application is first introduced below:

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: long term evolution (long term evolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex) , TDD) and other fourth generation (4th generation, 4G) communication systems, new radio (new radio, NR) and other fifth generation (5th generation, 5G) communication systems, or sixth generation (6th generation, 6G) communication systems, etc. Communication systems evolved after 5G, etc.

Please refer to Figure 1. Figure 1 is a schematic diagram of a system architecture provided by an embodiment of the present application. In the system architecture shown in Figure 1, it includes terminal equipment and network equipment. The terminal equipment and network equipment involved in the system architecture in Figure 1 are described in detail below.

1. Terminal equipment

Terminal equipment includes equipment that provides voice and/or data connectivity to users. For example, terminal equipment is a device with wireless transceiver functions that can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on On the water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons, satellites, etc.). The terminal device can be a mobile phone (mobile phone), tablet computer (Pad), computer with wireless transceiver function, virtual reality (VR) terminal, augmented reality (AR) terminal, industrial control (industrial control) Wireless terminals, vehicle-mounted terminals, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety Terminals, wireless terminals in smart cities, wireless terminals in smart homes, wearable terminals, etc. The embodiments of this application do not limit application scenarios. Terminal equipment can sometimes also be called terminals, user equipment (UE), access terminals, vehicle-mounted terminals, industrial control terminals, mobile stations, mobile stations, remote stations, remote terminals, mobile devices, wireless communication equipment, etc. Terminals can also be fixed or mobile. It can be understood that all or part of the functions of the terminal in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

2. Network equipment

Network equipment (also called access network equipment) is the node or device that connects terminal equipment to the wireless network. Access network equipment and terminal equipment The interface between end devices can be a Uu interface (or air interface). Of course, as the communication system continues to iterate, the names of these interfaces may remain unchanged or may be replaced by other names, which is not limited by this application.

The access network device can be any device with wireless transceiver functions, including but not limited to: next generation node B (gNB) and evolved node B (evolved node B, eNB) in the 5G communication system , next generation evolved node B (next generation eNB, ng-eNB), wireless backhaul equipment, wireless network controller (radio network controller, RNC), node B (node B, NB), home base station (home evolved nodeB , HeNB) or (home node B, HNB)), radio remote unit (remote radio unit, RRU), baseband unit (baseBand unit, BBU), transmission and receiving point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, device-to-device (D2D), vehicle outreach (vehicle-to-everything, V2X), machine-to-machine (M2M) communication Equipment with base station functions may also include network equipment in a non-terrestrial network (NTN) communication system, which may be deployed on high-altitude platforms or satellites. This is not specifically limited in the embodiments of the present application. In addition, the access network equipment can be a centralized unit (CU) and/or a distributed unit (DU). The CU and DU respectively have some functions of the base station. For example, the CU is responsible for processing non-real-time protocols. and services to implement radio resource control (RRC) and packet data convergence protocol (PDCP) layer functions. DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, media access control (MAC) layer and physical (physical, PHY) layer.

It should be noted that Figure 1 only uses one terminal device and one network device for schematic illustration, and cannot be regarded as a specific limitation of the technical solution of the present application. For example, the system architecture of the present application may also include multiple terminal devices and multiple network device.

In order to facilitate understanding of the content of this solution, some terms used in the embodiments of this application will be explained below to facilitate understanding by those skilled in the art. It should be noted that the following explanations are only for ease of understanding and should not be regarded as a specific limitation of this application.

1. About the power of physical uplink shared channel (PUSCH)

The terminal equipment uses the set configuration with index value j and the PUSCH power control adjustment state value with index value l in the bandwidth part (BWP) b of carrier f in serving cell c to transmit PUSCH, then the terminal equipment transmits PUSCH at the time of PUSCH transmission The transmission power of i is P _PUSCH,b,f,c (i,j,q _d ,l), as shown in formula (1).

Among them, i is defined by the slot index, the first symbol S in the slot and multiple consecutive symbols L. j is the index of the open-loop parameter. l is the index of the closed-loop power control state. q _d is the reference signal (RS) resource index used for path loss measurement. The value of μ is determined based on the subcarrier spacing.

P _CMAX,f,c (i) is the maximum transmission power configured for the terminal equipment at the PUSCH transmission time i of the carrier f in the serving cell c. Usually the network equipment configures a maximum transmission power value range for the terminal equipment, and the terminal equipment Usually it is 23dBm.

is the power level of the received signal expected by the network device, which is the sum of P _{O_NOMINAL} (j) and P _{O_UE} (j). That is to say, is the target power, which includes a cell-specific component P _{O_NOMINAL} (j) and a terminal equipment-specific component P _{O_UE} (j). Among them, the cell-specific component P _{O_NOMINAL} (j) is delivered through the system information block (system information block, SIB), and the terminal equipment-specific component P _{O_UE} (j) is delivered through the radio resource control (Radio Resource Control, RRC).

It is the PUSCH transmission bandwidth allocated to the i-th uplink transmission of the terminal device on the partial bandwidth b of the carrier f in the cell c. It is calculated based on the number of resource blocks (RB) resources, usually through the physical downlink control channel (physical The uplink grant (UL Grant) of downlink control channel (PDCCH) is issued.

PL _{b, f, c} (q _d ) is a path loss estimate, which can be estimated by the terminal device based on the downlink reference signal receiving power (RSRP). In a possible implementation, the terminal device compares the RSRP received on the downlink channel with the downlink reference signal power (broadcast by the network device), and then filters to obtain a feedback of the estimated value of the path loss, whose survival time is one report period, the path loss estimate has an error within the reporting threshold.

α _b,f,c (j) is the compensation factor for path loss.

is the power offset value of different modulation and coding scheme (MCS) formats relative to the reference MCS format, where, C is the number of code blocks transferred; K _r is the size of the code block; N _RE is the number of resource elements, is the number of symbols of PUSCH transmission opportunity i on the activated partial bandwidth b of carrier f of serving cell c, is the number of subcarriers that do not include demodulation reference signal (DM-RS) subcarriers and tracking reference signal (RS) samples in the PUSCH symbol,

f _{b, f, c} (i, l) are the adjustment amounts of the PUSCH transmit power of the terminal equipment, which are obtained by mapping the transmission power control (TPC) information in the PDCCH. When the terminal device transmits information 3 (also known as Msg3) or information A (also known as Msg A), f _{b, f, c} (i, l) = ΔP _{rampup, b, f, c} + δ _{msg2, b, f ,c} , where,

2. Power headroom report (PHR)

PHR is used to indicate the difference between the estimated power of uplink data transmission and the maximum transmission power of the terminal equipment (ie, power headroom (PH)). For example, the carrier f in the serving cell c is configured at the PUSCH transmission opportunity i The maximum transmit power of the terminal equipment can be recorded as P _CMAX,f,c (i), and the estimated power of uplink data transmission can be as P _PUSCH,b,f,c (i,j,q _d , in the aforementioned formula (1)) l). Further, after receiving the PHR from the terminal device, the network device can adjust the transmit power of the terminal device and allocate uplink resources to the terminal device according to the PH indicated in the PHR.

The reporting method of the PHR is that the terminal device reports the PHR to the network device through the media access control (media access control security, MAC) control element (control element, CE) along with the PUSCH. The terminal and device trigger the reporting of the PHR in the following two ways: :

Triggering method one: Start the periodic PHR timer. When the periodic PHR timer times out, trigger the terminal device to report PHR to the network device. In this way, the terminal equipment periodically reports PHR on a regular basis.

Trigger method two: Start the PHR disabling timer. When the PHR disabling timer times out, determine whether the absolute value of the difference between the path loss value at this time and the path loss value when the PHR was last reported is greater than the threshold; if it is greater than the threshold, threshold, the terminal device reports PHR to the network device.

3. Waveform switching

Waveforms in orthogonal frequency division multiplexing (OFDM) systems usually include two waveforms: cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform and discrete Fourier transform spread spectrum Orthogonal frequency division multiplexing (discrete fourier transform spread OFDM, DFT-S-OFDM) waveform. The CP-OFDM waveform can flexibly use frequency domain resources and support multi-user space division multiplexing; however, the CP-OFDM waveform may limit the uplink transmission power of the terminal equipment and reduce the cell coverage. The DFT-S-OFDM waveform is beneficial to improving cell coverage; however, the DFT-S-OFDM waveform can only use continuous frequency domain resources and does not support multi-user space division multiplexing.

In order to meet the adaptability of the waveform and cell coverage performance, it is usually necessary to perform dynamic waveform switching on the terminal equipment, which means that the waveform used by the terminal equipment is switched between the CP-OFDM waveform and the DFT-S-OFDM waveform. Usually, when the cell coverage performance is good, the terminal equipment tends to use the CP-OFDM waveform for data transmission; when the coverage performance is not good, the terminal equipment tends to use the DFT-S-OFDM waveform for data transmission.

In order to ensure the uplink coverage performance of the terminal equipment during the waveform switching process, this application provides a capability reporting method. The capability reporting method and communication device provided by this application will be further introduced below with reference to the accompanying drawings:

Please refer to Figure 2. Figure 2 is a schematic flowchart of a capability reporting method provided by an embodiment of the present application. As shown in Figure 2, Figure 2 takes terminal equipment and network equipment as execution subjects as an example for illustration. It can be understood that the execution subject of the capability reporting method can also be a chip of the terminal device or a chip in the network device. in:

S201. The terminal device receives a capability query request from the network device. Correspondingly, the network device sends a capability query request to the terminal device.

Wherein, the capability query request is used to obtain capability information of the terminal device, the capability information is used to indicate the power gain, and the power gain is used to indicate the power change amount of the terminal device after switching from the first waveform to the second waveform.

After establishing Radio Resource Control (RRC) between the terminal device and the network device, or before the network device decides to schedule the terminal device for waveform switching, the network device sends a capability query request to the terminal device. It should be noted that this capability query request can only be used to obtain capability information corresponding to the power gain of the terminal device, or a field or parameter for querying the power gain of the terminal device can be added to other capability query requests. This application does not proceed with this. Specific limitations.

S202. The terminal device sends a response message to the network device, where the response message includes capability information. Accordingly, the network device receives the response message from the terminal device.

Based on the capability query request, the terminal device obtains the difference (ie, power gain) between the power corresponding to the first waveform used by the terminal device and the power corresponding to the second waveform used by the terminal device, and reports the power gain to the network device. The power corresponding to the waveform can be estimated (or calculated) based on the resource configuration of the terminal device.

For example, the first waveform is a CP-OFDM waveform, the second waveform is a DFT-S-OFDM waveform, the power estimate when the terminal device uses the CP-OFDM waveform is P1, and the power estimate when the terminal device uses the DFT-S-OFDM waveform is P2, the power gain after the terminal equipment switches from the CP-OFDM waveform to the DFT-S-OFDM waveform is the difference ΔP between P2 and P1. Further, the terminal device sends a response message carrying capability information to the network device, where the capability information is used to indicate that the power gain of the terminal device is ΔP.

In a possible implementation, the capability information may directly indicate the specific value of the power gain (that is to say, the capability information is the value of the power gain), or the capability information may be used to indicate the quantization level of the power gain. , this quantization level is used to indicate the numerical range in which the power gain is located.

Exemplarily, the capability information is used to indicate the quantization level of the power gain for exemplary explanation. The threshold corresponding to the power gain can be determined between the network device and the terminal device through pre-definition (for example, protocol stipulations) or signaling interactive negotiation; further, the terminal device can determine the threshold corresponding to the power gain according to the gain between the power gain and the corresponding threshold of the power gain. The ratio determines the quantization level; the corresponding relationship between the gain ratio and the quantization level can be seen in Table 1. Further, the terminal device reports the quantified level of the power gain to the network device.

Table 1

In a possible implementation, the response message also includes first information, the first information is used to indicate the MCS of the second waveform corresponding to the capability information, and/or the first information is used to indicate the MCS corresponding to the capability information. Number of RBs.

It should be noted that the response message may explicitly include the first information. For example, the response message indicates that ΔP1, ΔP2, and ΔP1 correspond to quadrature phase shift keying (Quadrature Phase Shift Keyin, QPSK), and ΔP2 corresponds to 16 quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM). The response message may also include the first information implicitly. That is to say, the terminal device and the network device determine the MCS and/or the MCS corresponding to the power gain reported by the terminal device through pre-definition (such as protocol regulations) or signaling negotiation. The number of RBs. In this case, the response message does not include the MCS and/or the number of RBs corresponding to each power gain, but the network device can still obtain the MCS and/or the number of RBs corresponding to each power gain from the response message. For example, the protocol stipulates that when the terminal device reports multiple power gains, the power gains reported by the terminal device are arranged in the order of QPSK, 16QAM, 64QAM, and 256QAM. In this case, if ΔP1 is indicated in the response message, Then the response message indicates ΔP1 and the QPSK corresponding to ΔP1.

S203 (optional): If the power gain is greater than or equal to the third threshold, the network device sends waveform switching signaling to the terminal device. The waveform switching signaling is used to indicate switching from the first waveform to the second waveform.

The network device determines whether the power gain indicated by the capability information is greater than or equal to (including greater than, equal to, and greater than or equal to) a third threshold. If the power gain is greater than or equal to the third threshold, the network device sends an indication to the terminal device. Waveform switching signaling for waveform switching. On the contrary, when the power gain is less than the third threshold, the network device will not send waveform switching signaling to the terminal device.

It should be noted that, in the case where the capability information is used to indicate the quantization level of the power gain, when the quantization level of the power gain is greater than or equal to the quantization level corresponding to the third threshold, the network device sends an indication to the terminal device. Waveform switching signaling for waveform switching. On the contrary, when the power gain is less than the third threshold, the network device will not send waveform switching signaling to the terminal device.

The specific value of the third threshold can be adaptively adjusted according to specific application scenarios, and is not specifically limited in this application.

It is understandable that since different terminal devices use the same waveform, their performance will also be different. For example, the performance of terminal equipment 1 using CP-OFDM waveform for communication is almost the same as that using DFT-S-OFDM waveform; while the performance of terminal equipment 2 using CP-OFDM waveform for communication is almost the same as using DFT-S-OFDM waveform. The performance of communicating varies greatly. According to the capability reporting method provided in Figure 2, taking into account the differences of terminal devices, the network device will determine whether to schedule the terminal device for waveform switching based on the power gain reported by the terminal device, thereby avoiding the need to schedule terminal devices with smaller power gains. In the case of waveform switching (which can be understood as invalid waveform switching), waveform switching (effective waveform switching) is only performed on terminal equipment with larger power gain to ensure the uplink coverage performance of various terminal equipment.

In addition to ensuring the uplink coverage performance of the terminal device through the capability reporting method in Figure 2, this application also provides a PH reporting method to ensure the uplink coverage performance of the terminal device. This PH reporting method can be independent of the capability reporting in Figure 2 Method implementation can also be used in conjunction with the capability reporting method in Figure 2. That is to say, during the implementation of the power headroom reporting method, the network device may not obtain the capability information used to indicate the power gain of the terminal device; or, after determining that the terminal device performs waveform switching through the method of Figure 2, the terminal device passes The method shown in Figure 3 reports PH to the network device.

Please refer to Figure 3. Figure 3 is a schematic flow chart of the PH reporting method provided by the embodiment of the present application. As shown in Figure 3, Figure 3 uses a terminal The device and network device are the execution subjects as an example for explanation. It can be understood that the execution subject of the PH reporting method can also be a chip of the terminal device and a chip in the network device. in:

S301. The terminal device receives the first message from the network device. Correspondingly, the network device sends the first message to the terminal device.

Wherein, the first message includes an identifier of the third waveform, the first message is used to indicate reporting the first PHR corresponding to the third waveform, the first PHR is used to indicate the first PH, and the first PH is based on the use of the terminal device. The maximum transmit power of the third waveform is determined.

That is to say, the network device instructs the terminal device to report the first PHR through the first message, and the first PH indicated in the first PHR is determined based on the maximum transmission power of a specified waveform (ie, the third waveform).

S302. At the first moment, the terminal device sends the first PHR to the network device. Correspondingly, at the first moment, the network device receives the first PHR sent from the terminal device.

It should be noted that the terminal device sends the first PHR at the first moment and the network device receives the first PHR at the first moment, ignoring the transmission delay Δt between the terminal device and the network device. If the transmission delay Δt is not ignored, it can be described as that the terminal device sends the first PHR at the first time, and the network device receives the first PHR at a time interval Δt after the first time.

In a possible implementation of calculating the first PH, the first PH is the difference between the maximum transmit power corresponding to the third waveform configured by the terminal device and the estimated transmit power of the terminal device at the first moment. The estimated transmit power value is determined based on the resource configuration information at the first moment.

For example, the terminal device calculates the transmit power of the PUSCH at the first moment through the aforementioned formula (1) based on the resource configuration information corresponding to the first moment (including the number of resources, MCS, path loss value, etc.), and calculates the transmit power of the PUSCH corresponding to the third waveform according to the foregoing formula (1). The maximum transmission power determines the difference between the maximum transmission power of the PUSCH corresponding to the third waveform and the transmission power of the PUSCH at the first time (ie, the first PH). Further, the terminal device sends a first PHR indicating the first PH to the network device at the first moment.

It should be noted that at the first moment, the terminal device may use the third waveform for communication. Or, at the first moment, the terminal device communicates using a fourth waveform, and the fourth waveform is different from the third waveform. The method of calculating the first PH will be described in detail below in the following two situations.

Scenario 1: The terminal device uses the third waveform at the first moment.

In this case, during communication using the third waveform, the terminal device receives a first message from the network device, where the first message is used to instruct the terminal device to report the first PHR. Further, the terminal device determines the estimated transmission power at the first time according to the resource configuration information associated with the third waveform configured at the first time, and determines the maximum transmission power corresponding to the third waveform configured by the network device and the transmission power at the first time. The difference between the estimated values determines the first pH.

Scenario 2: The terminal device uses the fourth waveform at the first moment, and the fourth waveform is different from the third waveform.

In this case, during communication using the fourth waveform, the terminal device receives a first message from the network device, where the first message is used to instruct the terminal device to report the first PHR. Further, the terminal device determines the estimated transmission power at the first time according to the resource configuration information associated with the fourth waveform configured at the first time, and according to the maximum transmission power corresponding to the third waveform configured by the network device and the transmission at the first time The difference between the power estimates determines the first PH.

After introducing how to calculate the first PH, the following is a detailed explanation of how the first PHR indicates the first PH. For details, please refer to the following two methods:

Method 1: The first PHR includes second information, and the second information is used to indicate the first PH.

Specifically, the second information may directly indicate the specific value of the first PH (that is, the second information is the value of the first PH), or the second information may be used to indicate the power headroom of the first PH. Level, the power headroom level is used to indicate the numerical range in which the first PH is located. The following is an exemplary description taking the second information used to indicate the power headroom level of the first PH as an example.

In one example, the reporting format of the first PH can be as shown in Figure 4a. In Figure 4a, the PHR MAC CE corresponds to 2 bytes (the first byte and the second byte), and each byte includes 8 bit. The PHR MAC CE shown in Figure 4a includes: first field to fifth field; among them, the first field is the P field, which fixedly occupies the first bit of the first byte; the second field is a reserved field R, this field occupies the second bit of the first byte and is usually set to 0, which can be understood as a reserved unused bit; the third field is the PH field, which occupies the third bit of the first byte. ~8bit, used to indicate the power headroom level; the fourth field is the MPE field, which occupies the 1st to 2nd bits of the second byte; the fifth field is the maximum power P _-Cmax field, which occupies the second word. The 3rd to 8th bits of the section are used to indicate the calculation of the maximum power P _-Cmax of the PH.

In another example, the reporting format of the first PH may be as shown in Figure 4b. In Figure 4b, the PHR MAC CE corresponds to one byte, and the byte includes 8 bits. The PHR MAC CE shown in Figure 4b includes: a first field ~ and a second field; among them, the first field is a reserved field, which occupies the 1st to 2nd bits and is usually set to 0, which can be understood as two reserved fields. The unused bit; the second field is the PH field, which occupies the 3rd to 8th bits.

Method 2: The first PHR includes second information, and the second information is used to indicate the amount of change between the first PH and the second PH indicated by the second PHR (hereinafter collectively referred to as ΔPH). The second PHR and the first PHR are PHRs sent adjacently, and the sending time of the second PHR is before the first time.

That is to say, the terminal device can indirectly indicate the PH reported this time by indicating the difference between the PH reported this time (ie, the first PH) and the PH reported last time (ie, the second PH).

In a possibility of the second method, the second information may directly indicate the specific value of the ΔPH (that is to say, the second information is the ΔPH between the first PH and the second PH), or the second The information is used to indicate the change amount ΔPH level of the change amount, and the ΔPH level is used to indicate the numerical range in which the ΔPH is located.

Taking the second information used to indicate the ΔPH level as an example, in an example, the reporting format of the first PH can be as shown in Figure 4c. In Figure 4c, the PHR MAC CE corresponds to one byte, and the byte includes 8 bit. The PHR MAC CE shown in Figure 4c includes: a first field ~ and a second field; among them, the first field is a reserved field, which occupies the 1st to 2nd bits and is usually set to 0, which can be understood as two reserved fields. The unused bit; the second field is the ΔPH level field, which occupies the 3rd to 8th bits. The correspondence between the ΔPH level indicated by the second field and ΔPH is as shown in Table 2.

Table 2

Further, the network device may perform power control or resource allocation according to the first PH indicated by the first PHR to ensure the uplink coverage performance of the terminal device.

Please refer to Figure 5. Figure 5 is a schematic flow chart of another PH reporting method provided by an embodiment of the present application. Figure 5 is a specific application example of Figure 3, wherein:

S501. While the terminal device uses the fourth waveform, the terminal device receives a first message from the network device. The first message is used to instruct the first moment to report the first PHR corresponding to the third waveform. The first PHR is used to indicate The first PH is determined based on the maximum transmit power of the terminal device using the third waveform.

For the specific implementation of S501, please refer to the aforementioned description of the specific implementation of S301, which will not be described again here.

It should be noted that, in a possible implementation, the first message may explicitly include the identification of the third waveform. For example, when the fourth waveform is a CP-OFDM waveform, the first message received by the terminal device includes information indicating the DFT-S-OFDM waveform. In another possible implementation, the first message may be an identifier that implicitly indicates the third waveform. For example, the communication system includes two waveforms: CP-OFDM waveform and DFT-S-OFDM waveform. The first information is used to indicate reporting the first PHR corresponding to the third waveform (different from the fourth waveform) at the first moment. . In this case, if the fourth waveform is a CP-OFDM waveform, the terminal equipment and network equipment default the third waveform to be a DFT-S-OFDM waveform. That is to say, in this case, the first information does not need to contain the third waveform. The terminal device can also know that the third waveform is the DFT-S-OFDM waveform.

S502. The terminal device sends the first PHR at the first moment.

For the specific implementation of S502, please refer to the detailed description of the second situation in S302. For the way in which the first PHR indicates the first PH, please also refer to the detailed description of the first and second methods in S302, which will not be discussed here. Repeat.

By implementing the PH reporting method provided in Figure 3 or Figure 5, before the waveform switching, the network device can learn the estimated PH of the terminal device after the waveform switching. Further, the network device can perform resource management after the waveform switching based on the estimated PH. Configuration or power control to ensure the uplink coverage performance of terminal equipment. For example, when the first PH is a positive number, the resources configured by the network device after waveform switching can be greater than the resources allocated at the first moment to improve the uplink coverage performance of the terminal device; when the first PH is a negative number, After waveform switching, the resources configured by the network device can be smaller than the resources allocated at the first moment to ensure the stability of the uplink coverage performance of the terminal device.

In summary, Figure 5 shows a method of pre-reporting PH in the waveform switching stage. In addition, this application also provides another PH reporting method to ensure the uplink coverage performance of the terminal equipment. This PH reporting method can be implemented independently of the capability reporting method in Figure 2, or can be implemented in conjunction with Use in combination with the capability reporting method in Figure 2. That is to say, during the implementation of the PH reporting method, the network device may not obtain the capability information used to indicate the power gain of the terminal device; or, after determining to perform waveform switching on the terminal device through the method of Figure 2, the terminal device uses Figure 6 The method shown reports the PH to the network device. Moreover, the PH reporting method can also be implemented independently of the capability reporting method in Figure 5, or can be used in combination with the capability reporting method in Figure 5. That is to say, during the waveform switching stage, the terminal device can only report the PH after the waveform switching in the manner shown in Figure 6 . Alternatively, the terminal device may not only pre-report the PH before the waveform switching through the method shown in Figure 5, but also report the PH after the waveform switching through the method shown in Figure 6.

Please refer to Figure 6 below. Figure 6 is a schematic flowchart of the power headroom reporting method provided by an embodiment of the present application. As shown in Figure 6, Figure 6 takes the terminal device and the network device as the execution subject as an example for explanation. It can be understood that the execution subject of the power headroom reporting method may also be a chip of the terminal device or a chip in the network device. in:

S601. During communication using the first waveform, the terminal device receives a second message and a third message from the network device. The second message is used to indicate switching from the first waveform to the second waveform. The third message is used to indicate reporting. The third PHR corresponding to the second waveform; the third PHR is used to indicate the third PH, and the third PH is determined based on the maximum transmit power of the terminal device using the second waveform.

Correspondingly, during communication by the terminal device using the first waveform, the network device sends the second message and the third message to the terminal device eh. It should be noted that this application does not specifically limit the order in which the network device sends the second message and the third message. For example, the network device may send the third message before sending the second message. That is to say, the network device first sends the third message to the terminal device to instruct the terminal device to report the third PHR after performing waveform switching; then, the network device The device then sends a second message (for example, waveform switching signaling) to the terminal device to instruct the terminal device to perform waveform switching.

In a possible implementation, the second message and the third message are the same message. For example, the network device sends waveform switching signaling to the terminal device. The waveform switching signaling is used to instruct the terminal device to switch from the first waveform to the second waveform, and is also used to instruct the terminal device to report to the network device after switching to the second waveform. Third PHR.

S602. The terminal device sends a third PHR to the network device at a second time, which is during communication using the second waveform.

The terminal device performs waveform switching according to the second message, and at the second moment after the waveform switching (that is, during the period when the terminal device uses the second waveform to communicate), the terminal device sends a third PHR to the network device. The third PHR is used to indicate the third PHR. Three pH. The third PH is the difference between the maximum transmit power corresponding to the second waveform configured by the terminal device and the estimated transmit power of the terminal device at the second moment. The estimated transmit power at the second moment is based on the resource configuration at the second moment. The information is certain.

After introducing how to calculate the third PH, the following is a detailed explanation of the way in which the third PHR indicates the third PH. For details, please refer to the following two methods:

Method 1: The third PHR includes third information, and the third information is used to indicate the third PH.

Method 2: The third PHR includes third information, the third information is used to indicate the amount of change between the third PH and the fourth PH indicated by the fourth PHR; wherein the fourth PHR and the third PHR are adjacent transmissions. PHR, and the sending time of the fourth PHR is before the second time.

The description of the first and second methods of the third PHR instructing the third PH is the same as the implementation principle of the first and second methods of the first PHR instructing the first PH in S302, and will not be described again here.

In a possible implementation, at M moments after the second moment, the terminal device sends M PHRs to the network device, where M is an integer greater than or equal to 0. Among them, the third time is one of M times, and the PHR sent at the third time is used to indicate the PH at the third time; the fourth time and the third time are adjacent times of sending PHR, and the fourth time is between Before the third moment. In this case, the difference between the PH at the third moment and the PH at the fourth moment is greater than or equal to the first threshold, and/or the time interval between the third moment and the fourth moment is greater than or equal to the second threshold. threshold.

In other words, the triggering methods that trigger the terminal device to report PHR include the following triggering method 1 to triggering method 3, among which:

Triggering method 1: Report PHR periodically according to the timer.

For example, take the PHR reported at the fourth time as the aforementioned third PHR (that is, the fourth time and the second time are the same time). In this case, the terminal device reports the third PHR to the network device at the second moment, and starts the timer at the second moment. If the timer times out at the third moment (that is, the timer's timing is greater than or equal to the second threshold), then at the third moment, the terminal device reports the PHR indicating the PH at the current moment to the network device, and restarts the timer.

Triggering method 2: If the difference between the current PH and the last reported PHR is greater than or equal to the first threshold, reporting of the PHR to the network device is triggered.

For example, take the PHR reported at the fourth moment as the aforementioned third PHR. After the terminal device reports the third PHR to the network device at the second moment, it monitors the PH of the terminal device in real time (or performs periodic detection according to a certain time period). If it is detected at the third moment that the difference between the PH and the third PHR indicating the third PH is greater than or equal to the first threshold, the terminal device sends the PHR to the network device at the third moment.

Triggering method three: If the difference between this PH and the last reported PHR is greater than or equal to the first threshold, and the difference between the current PH and the last reported PHR is The time is greater than or equal to the second threshold, then the PHR is reported to the network device.

For example, take the PHR reported at the fourth moment as the aforementioned third PHR. After the terminal device reports the third PHR to the network device at the second moment, it starts a timer and monitors the PH of the terminal device in real time (or performs periodic detection according to a certain time period). If it is detected at the third moment that the difference between the PH and the third PHR indicating the third PH is greater than or equal to the first threshold, and the timer times out at the third moment (that is, the timer between the third moment and the second moment time interval is greater than or equal to the second threshold), the terminal device reports the PHR indicating the PH at the current time to the network device at the third time, and restarts the timer.

By implementing the power headroom reporting method provided in Figure 6, the network device can learn the power headroom of the terminal device after waveform switching. Further, the network device can perform resource configuration or power control based on the power headroom to ensure the safety of the terminal device. Uplink coverage performance. For example, when the first PH is a positive number, the resources configured by the network device after waveform switching can be greater than the resources allocated at the first moment to improve the uplink coverage performance of the terminal device; when the first PH is a negative number, After waveform switching, the resources configured by the network device can be smaller than the resources allocated at the first moment to ensure the stability of the uplink coverage performance of the terminal device.

Please refer to FIG. 7 , which shows a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device shown in Figure 7 can be used to implement some or all functions of the terminal equipment in the embodiment corresponding to the above capability reporting method, and can also be used to implement some or all functions of the terminal equipment in the embodiment corresponding to the above power headroom reporting method. . Alternatively, the communication device shown in Figure 7 can be used to implement part or all of the functions of the network equipment in the embodiment corresponding to the above capability reporting method, and can also be used to implement part or all of the network equipment in the embodiment corresponding to the above power headroom reporting method. Full functionality.

In one embodiment, the communication device shown in Figure 7 can be used to implement some or all functions of the terminal device in the method embodiment described in Figure 2 above. The device may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device. The communication device may also be a chip system. The communication device shown in Figure 7 may include a communication module 701 and a processing module 702, where the processing module 702 is used to process data received by the communication module 701, or the data processed by the processing module 702 can be sent through the communication module 701;

Communication module 701, configured to receive a capability query request from a network device. The capability query request is used to obtain capability information of the terminal device. The capability information is used to indicate power gain; wherein the power gain is used to indicate switching from the first waveform. The amount of power change of the terminal equipment after reaching the second waveform;

The communication module 701 is also used to send a response message to the network device, where the response message includes the capability information.

In a possible implementation, the response message also includes first information, the first information is used to indicate the modulation and coding strategy MCS of the second waveform corresponding to the capability information, and/or the first information is used to indicate The number of resource blocks RB corresponding to this capability information.

In one embodiment, the communication device shown in Figure 7 can be used to implement some or all functions of the terminal device in the method embodiment described in Figure 3 or Figure 5. The device may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device. The communication device may also be a chip system. The communication device shown in Figure 7 can include a communication module 701 and a processing module 702, wherein the processing module 702 is used to process data received by the communication module 701, or the data processed by the processing module 702 can be sent through the communication module 701;

The communication module 701 is configured to receive a first message from the network device, the first message including an identifier of the third waveform; wherein the first message is used to indicate reporting the first power headroom report PHR corresponding to the third waveform, the The first PHR is used to indicate the first PH, which is determined based on the maximum transmit power of the terminal device using the third waveform;

The communication module 701 is also used to send the first PHR to the network device at the first moment.

In a possible implementation, during the use of the fourth waveform, the communication module 701 is configured to receive a first message from the network device, the first message being used to indicate reporting the third waveform corresponding to the third waveform at the first moment. A power headroom report PHR; the first PHR is used to indicate the first PH; the first PH is determined based on the maximum transmit power of the terminal device using a third waveform, and the third waveform is different from the fourth waveform. The communication module 701 is also used to send the first PHR to the network device at the first moment.

In one embodiment, the communication device shown in Figure 7 can be used to implement part or all of the functions of the terminal device in the method embodiment described in Figure 6 above. The device may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device. The communication device may also be a chip system. The communication device shown in Figure 7 can include a communication module 701 and a processing module 702, wherein the processing module 702 is used to process data received by the communication module 701, or the data processed by the processing module 702 can be sent through the communication module 701;

Communication module 701, configured to receive a second message and a third message from the network device during communication using the first waveform. The second message is used to indicate switching from the first waveform to the second waveform. The third message is used to Instruct to report the third power headroom report PHR corresponding to the second waveform; the third PHR is used to indicate the third PH, the third PH is determined based on the maximum transmit power of the terminal device using the second waveform;

The communication module 701 is also configured to send a third PHR to the network device at a second moment, the second moment being during communication using the second waveform.

In a possible implementation, the communication module 701 is also configured to send M PHRs to the network device at M times after the second time, where M is an integer greater than or equal to 0; wherein, the PHR sent at the third time Used to indicate the PH at the third moment. The third moment is one of M moments; the difference between the PH at the third moment and the PH at the fourth moment is greater than or equal to the first threshold, and/or, the third moment The time interval between the fourth time and the fourth time is greater than or equal to the second threshold; the fourth time and the third time are adjacent times of sending PHR, and the fourth time is before the third time.

For a more detailed description of the above communication module 701 and the processing module 702, please refer to the relevant description of the terminal device in the above method embodiment, which will not be described here.

In one embodiment, the communication device shown in Figure 7 can be used to implement some or all of the functions of the network device in the method embodiment described in Figure 2 above. The device may be a network device, a device in the network device, or a device that can be used in conjunction with the network device. The communication device may also be a chip system. The communication device shown in Figure 7 may include a communication module 701 and a processing module 702, where the processing module 702 is used to process data received by the communication module 701, or the data processed by the processing module 702 can be sent through the communication module 701;

The communication module 701 is used to send a capability query request to the terminal device. The capability query request is used to obtain capability information. The capability information is used to indicate power gain; where the power gain is used to indicate that after switching from the first waveform to the second waveform The amount of power change of the terminal equipment;

The communication module 701 is also used to receive a response message from the terminal device, where the response message includes capability information.

In a possible implementation, if the power gain is greater than or equal to the third threshold, the communication module 701 is also configured to send waveform switching signaling to the terminal device, where the waveform switching signaling is used to indicate switching from the first waveform to Second waveform.

In one embodiment, the communication device shown in Figure 7 can be used to implement part or all of the functions of the network device in the method embodiment described in Figure 3 or Figure 5. The device may be a network device, a device in the network device, or a device that can be used in conjunction with the network device. The communication device may also be a chip system. The communication device shown in Figure 7 may include a communication module 701 and a processing module 702, where the processing module 702 is used to process data received by the communication module 701, or the data processed by the processing module 702 can be sent through the communication module 701;

The communication module 701 is configured to send a first message to the terminal device, where the first message includes an identifier of the third waveform; wherein the first message is used to indicate reporting the first power headroom report PHR corresponding to the third waveform; the first message PHR is used to indicate the first PH; the first PH is determined based on the maximum transmit power of the terminal device using the third waveform;

The communication module 701 is also used to receive the first PHR from the terminal device at the first moment.

In a possible implementation, while the terminal device uses the fourth waveform, the communication module 701 is configured to send a first message to the terminal device, where the first message is used to instruct to report the first message corresponding to the third waveform at the first moment. Power Headroom Report PHR; the first PHR is used to indicate The first PH; the first PH is determined based on the maximum transmit power of the terminal device using a third waveform, which is different from the fourth waveform; the communication module 701 is also used to receive the first signal from the terminal device at the first moment. PHR.

In one embodiment, the communication device shown in Figure 7 can be used to implement some or all of the functions of the network device in the method embodiment described in Figure 6 above. The device may be a network device, a device in the network device, or a device that can be used in conjunction with the network device. The communication device may also be a chip system. The communication device shown in Figure 7 may include a communication module 701 and a processing module 702, where the processing module 702 is used to process data received by the communication module 701, or the data processed by the processing module 702 can be sent through the communication module 701;

The communication module 701 is configured to send a second message and a third message to the terminal device during communication using the first waveform. The second message is used to indicate switching from the first waveform to the second waveform. The third message is The third power headroom report PHR corresponding to the instruction to report the second waveform is used to indicate a third PH, and the third PH is determined based on the maximum transmit power of the terminal device using the second waveform. The communication module 701 is also configured to receive the third PHR from the terminal device at a second time, which is during the terminal device using the second waveform for communication.

In a possible implementation, the communication module 701 is configured to receive M PHRs from the terminal device at M times after the second time, where M is an integer greater than or equal to 0; wherein, the PHR sent at the third time PHR is used to indicate the PH at the third moment; the third moment is one of the M moments; the difference between the PH at the third moment and the PH at the fourth moment is greater than or equal to the first threshold, and/or, the The time interval between the third time and the fourth time is greater than or equal to the second threshold; the fourth time and the third time are adjacent times for sending the PHR, and the fourth time is before the third time.

For a more detailed description of the communication module 701 and the processing module 702, please refer to the relevant description of the network device in the above method embodiment, which will not be described again here.

Please refer to FIG. 8 , which is a schematic structural diagram of a communication device 800 provided by this application. The communication device 800 includes a processor 810 and an interface circuit 820 . The processor 810 and the interface circuit 820 are coupled to each other. It can be understood that the interface circuit 820 may be a transceiver or an input-output interface. Optionally, the communication device 800 may also include a memory 830 for storing instructions executed by the processor 810 or input data required for the processor 810 to run the instructions or data generated after the processor 810 executes the instructions.

When the communication device 800 is used to implement the method in the above method embodiment, the processor 810 can be used to perform the function of the above processing module 702, and the interface circuit 820 can be used to perform the function of the above communication module 701.

When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiment. The terminal device receives information from other modules (such as radio frequency modules or antennas) in the terminal device, and the information is sent by the network device to the terminal device; or, the terminal device chip sends information to other modules (such as radio frequency modules or antennas) in the terminal device. ) sends information, which is sent by the terminal device to the network device.

When the above communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiment. The network device receives information from other modules in the network device (such as radio frequency modules or antennas), and the information is sent by the terminal device to the network device; or, the network device chip sends information to other modules in the network device (such as radio frequency modules or antennas) ) sends information, which is sent by the network device to the terminal device.

It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), or application-specific integrated circuit. (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. Software instructions can be composed of corresponding software modules, which can be stored in random access memory (random access memory, RAM), flash memory, read-only memory (Read-Only Memory, ROM), programmable read-only memory (programmable ROM) , PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or other well-known in the art any other form of storage media. An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage media may be located in an ASIC. Additionally, the ASIC can be located in network equipment or terminal equipment. Of course, the processor and the storage medium can also exist as discrete components in network equipment or terminal equipment.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer program or instructions may be stored in or transmitted over a computer-readable storage medium. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media. The available media may be magnetic media, such as floppy disks, hard disks, and magnetic tapes; they may also be optical media, such as DVDs; or they may be semiconductor media, such as solid state disks (SSD).

In the various embodiments of this application, if there is no special explanation or logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic.

Embodiments of the present application also provide a computer-readable storage medium. Computer-executable instructions are stored in the computer-readable storage medium. When the computer-executable instructions are executed, the method executed by the terminal device or network device in the above method embodiment is caused. be realized.

Embodiments of the present application also provide a computer program product. The computer program product includes a computer program. When the computer program is executed, the method executed by the terminal device or the network device in the above method embodiment is implemented.

An embodiment of the present application also provides a communication system, which includes a terminal device and a network device. The terminal device is used to execute the method executed by the terminal device in the above method embodiment. The network device is configured to perform the method performed by the network device in the above method embodiment.

It should be noted that for the sake of simple description, the foregoing method embodiments are expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence. Because certain steps may be performed in other orders or simultaneously according to this application. Secondly, those skilled in the art should also know that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily necessary for this application.

The descriptions of various embodiments provided in this application can be referred to each other, and each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, you can refer to the relevant descriptions of other embodiments. For the convenience and simplicity of description, for example, regarding the functions and execution steps of each device and equipment provided in the embodiments of the present application, reference may be made to the relevant descriptions of the method embodiments of the present application. The differences between the method embodiments and the device embodiments are also Can refer to, combine or quote each other. If there are no special instructions or logical conflicts, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships. . It should be understood that the term "and/or" in this article is only an association relationship describing related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, and A and B exist simultaneously. , there are three situations of B alone.

It should be understood that in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B only based on A. B can also be determined based on A and/or other information.

“Multiple” appearing in the embodiments of this application refers to two or more than two.

The first, second, etc. descriptions appearing in the embodiments of the present application are only for illustration and distinction of the described objects. There is no order, nor do they represent a special limit on the number of objects described in the embodiments of the present application. They cannot constitute Any limitations on the embodiments of this application.

It can be understood that in the embodiment of the present application, the terminal and/or the network device may perform some or all of the steps in the embodiment of the present application. These steps or operations are only examples. In the embodiment of the present application, other operations or operations may also be performed. A variation of the operation. In addition, various steps may be performed in a different order than those presented in the embodiments of the present application, and it may not be necessary to perform all operations in the embodiments of the present application.

Claims

A capability reporting method, characterized in that the method includes:

Receive a capability query request from the network device. The capability query request is used to obtain capability information of the terminal device. The capability information is used to indicate power gain; wherein the power gain is used to indicate switching from the first waveform to the second waveform. The power change amount of the terminal equipment after the waveform;

Send a response message to the network device, where the response message includes the capability information.
The method according to claim 1, characterized in that the response message further includes first information, the first information is used to indicate the modulation and coding strategy MCS of the second waveform corresponding to the capability information, and/ Or, the first information is used to indicate the number of resource blocks RB corresponding to the capability information.
A power headroom PH reporting method, characterized in that the method includes:

Receive a first message from the network device; the first message includes an identifier of the third waveform;

Wherein, the first message is used to indicate reporting of the first power headroom report PHR corresponding to the third waveform; the first PHR is used to indicate the first PH; the first PH is based on the terminal device using the The maximum transmit power of the third waveform is determined;

The first PHR is sent to the network device at the first moment.
The method according to claim 3, characterized in that:

The terminal device uses the third waveform at the first moment; or the terminal device uses a fourth waveform at the first moment, and the fourth waveform is different from the third waveform.
The method according to claim 3 or 4, characterized in that the first PH is the maximum transmission power corresponding to the third waveform configured by the terminal equipment and the transmission power of the terminal equipment at the first moment. The estimated value of the transmit power at the first moment is determined based on the resource configuration information at the first moment.
The method according to any one of claims 3-5, characterized in that the first PHR includes second information, the second information is used to indicate the first PH, or the second information is The amount of change between the second PH indicated by the first PH and the second PHR indication; wherein the second PHR and the first PHR are PHRs transmitted adjacently, and the transmission of the second PHR time before the first time.
A power headroom PH reporting method, characterized in that the method includes:

During communication using the first waveform, receive a second message and a third message from the network device, the second message is used to indicate switching from the first waveform to the second waveform, and the third message is used to indicate reporting. The third power headroom report PHR corresponding to the second waveform; the third PHR is used to indicate a third PH, and the third PH is determined based on the maximum transmit power of the terminal device using the second waveform;

The third PHR is sent to the network device at a second time during communication using the second waveform.
The method of claim 7, wherein the third PH is the maximum transmit power corresponding to the second waveform configured by the terminal device and the estimated transmit power of the terminal device at the second moment. The estimated value of the transmit power at the second time is determined based on the resource configuration information at the second time.
The method according to claim 7 or 8, characterized in that the second message and the third message are the same message.
The method according to any one of claims 7-9, characterized in that the third PHR includes third information, the third information is used to indicate the third PH, or the third information is used to Indicates the amount of change between the third PH and the fourth PH indicated by the fourth PHR; wherein the fourth PHR and the third PHR are PHRs sent adjacently, and the sending time of the fourth PHR before said second moment.
The method according to any one of claims 7-10, characterized in that, the method further includes:

Send M PHRs to the network device at M times after the second time, where M is an integer greater than or equal to 0;

Wherein, the PHR sent at the third time is used to indicate the PH at the third time; the third time is one of the M times; and the PH between the PH at the third time and the PH at the fourth time is The difference is greater than or equal to the first threshold, and/or the time interval between the third moment and the fourth moment is greater than or equal to the second threshold; the fourth moment and the third moment are adjacent The time when the PHR is sent, the fourth time is before the third time.
A capability receiving method, characterized in that the method includes:

Send a capability query request to the terminal device, the capability query request is used to obtain capability information, the capability information is used to indicate power gain; wherein the power gain is used to indicate the power gain after switching from the first waveform to the second waveform. The amount of power change of the terminal equipment;

A response message is received from the terminal device, where the response message includes the capability information.
The method according to claim 12, characterized in that the response message further includes first information, and the first information is used to indicate The modulation and coding strategy MCS of the second waveform corresponding to the capability information, and/or the first information is used to indicate the number of resource blocks RB corresponding to the capability information.
The method according to claim 12 or 13, characterized in that, the method further includes:

If the power gain is greater than or equal to the third threshold, waveform switching signaling is sent to the terminal device, where the waveform switching signaling is used to indicate switching from the first waveform to the second waveform.
A power headroom PH receiving method, characterized in that the method includes:

Send a first message to the terminal device, where the first message includes an identifier of the third waveform;

Wherein, the first message is used to indicate reporting of the first power headroom report PHR corresponding to the third waveform; the first PHR is used to indicate the first PH; the first PH is based on the use of the terminal equipment The maximum transmit power of the third waveform is determined;

The first PHR from the terminal device is received at a first moment.
The method according to claim 15, characterized in that:

The terminal device uses the third waveform at the first moment; or the terminal device uses a fourth waveform at the first moment, and the fourth waveform is different from the third waveform.
The method according to claim 15 or 16, characterized in that the first PH is the maximum transmission power corresponding to the third waveform configured by the terminal equipment and the transmission power of the terminal equipment at the first moment. The estimated value of the transmit power at the first moment is determined based on the resource configuration information at the first moment.
The method according to any one of claims 15-17, characterized in that the first PHR includes second information, the second information is used to indicate the first PH, or the second information is used to Indicates the amount of change between the first PH and the second PH indicated by the second PHR; wherein the second PHR and the first PHR are PHRs sent adjacently, and the sending time of the second PHR before said first moment.
A power headroom PH receiving method, characterized in that the method includes:

During communication using the first waveform by the terminal device, a second message and a third message are sent to the terminal device, the second message is used to indicate switching from the first waveform to the second waveform, and the third message is used to indicate Report the third power headroom report PHR corresponding to the second waveform; the third PHR is used to indicate the third PH, and the third PH is determined based on the maximum transmit power of the terminal device using the second waveform. of;

The third PHR from the terminal device is received at a second time, and the second time is during communication using the second waveform by the terminal device.
The method of claim 19, wherein the third PH is the maximum transmit power corresponding to the second waveform configured by the terminal device and the estimated transmit power of the terminal device at the second moment. The estimated value of the transmit power at the second time is determined based on the resource configuration information at the second time.
The method according to claim 19 or 20, characterized in that the second message and the third message are the same message.
The method according to any one of claims 19-21, characterized in that the third PHR includes third information, the third information is used to indicate the third PH, or the third information is used to Indicates the amount of change between the third PH and the fourth PH indicated by the fourth PHR; wherein the fourth PHR and the third PHR are PHRs sent adjacently, and the sending time of the fourth PHR before said second moment.
The method according to any one of claims 19-22, characterized in that the method further includes:

Receive M PHRs from the terminal device at M times after the second time, where M is an integer greater than or equal to 0;

Wherein, the PHR sent at the third time is used to indicate the PH at the third time; the third time is one of the M times; and the PH between the PH at the third time and the PH at the fourth time is The difference is greater than or equal to the first threshold, and/or the time interval between the third moment and the fourth moment is greater than or equal to the second threshold; the fourth moment and the third moment are adjacent The time when the PHR is sent, the fourth time is before the third time.
A communication device, characterized in that it includes a module or unit for performing the method as claimed in claim 1 or 2; or, it includes a module or unit for performing the method as described in any one of claims 3-6. ; Alternatively, it includes a module or unit for performing the method according to any one of claims 7-11.
A communication device, characterized in that it includes a module or unit for performing the method according to any one of claims 12-14; or, it includes a module or unit for performing the method according to any one of claims 15-18. A module or unit; or, a module or unit for performing the method according to any one of claims 19-23.
A communication device, characterized in that it includes a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to transmit signals from the processor. The signal is sent to the communication device outside the Other communication devices, the processor is used to implement the method according to any one of claims 1-11 or 12-23 through logic circuits or execution code instructions.
A communication system, characterized in that the communication system includes a terminal device and a network device, wherein the terminal device is used to perform the method according to any one of claims 1-11, and the network device uses In performing the method according to any one of claims 12-23.
A computer-readable storage medium, characterized in that a computer program or instructions are stored in the storage medium. When the computer program or instructions are executed by a communication device, claims 1-11 or 12-23 are implemented. any one of the methods.
A computer program product, characterized in that when a computer reads and executes the computer program product, it causes the computer to execute the method described in any one of claims 1-11 or 12-23.