Signal transmission method and device

Abstract

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond 4G communication systems such as Long Term Evolution (LTE). In one aspect, the disclosure provides a method performed by a user equipment (UE) in a wireless communication system, comprising: sending a first message to a first network node, the first message indicates whether the UE has a capability related to supporting peak-to-average power ratio (PAPR) processing or the first message indicates whether the UE has a capability related to supporting a subcarrier reservation (TR) technology; receiving a second message sent by the first network node, wherein the second message notifies the UE to use or not use the TR technology; when the TR technology is used according to the second message, information of reserved subcarriers is determined, and the information of the reserved subcarriers comprises at least one of the proportion, the number and the position of the reserved subcarriers; and performing uplink signal transmission based on the information of the reserved subcarrier.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communications, and more specifically, to a signal transmission method and corresponding equipment. Background Art

[0002] Considering the development of wireless communication from generation to generation, these technologies are mainly developed for services targeting people, such as voice calls, multimedia services, and data services. With the commercialization of the fifth-generation (5G) communication system, the number of connected devices is expected to grow exponentially. These will be increasingly connected to the communication network. Examples of the Internet of Things can include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to develop in various forms such as augmented reality glasses, virtual reality headsets, and holographic devices. Efforts have been made to develop improved 6G communication systems in order to provide various services by connecting hundreds of billions of devices and things in the sixth-generation (6G) era. For these reasons, 6G communication systems are called super 5G systems.

[0003] The 6G communication system, which is expected to be commercialized around 2030, will have a peak data rate of tera (1,000 gigabits) bps and a radio latency of less than 100 μsec, thus being 50 times the data rate of the 5G communication system and having 1 / 10 of its radio latency.

[0004] In order to achieve such high data rates and ultra-low latency, the implementation of 6G communication systems in terahertz (e.g., 95GHz to 3THz bands) has been considered. It is expected that since the path loss and atmospheric absorption in the terahertz band are more serious than those in the millimeter wave (mmWave) band introduced in 5G, the technology that can ensure the signal transmission distance (i.e., coverage) will become more critical. As the main technology to ensure coverage, it is necessary to develop radio frequency (RF) elements, antennas, new waveforms with better coverage than orthogonal frequency division multiplexing (OFDM), beamforming and massive multiple input multiple output (MIMO), full dimensional multiple input multiple output (FD-MIMO), array antennas, and multi-antenna transmission technologies such as massive antennas. In addition, new technologies have been discussed to improve signal coverage in the terahertz band, such as metamaterial-based lenses and antennas, orbital angular momentum (OAM), and reconfigurable intelligence surface (RIS).

[0005] In addition, in order to improve spectrum efficiency and overall network performance, the following technologies have been developed for 6G communication systems: full-duplex technology for enabling uplink and downlink transmissions to use the same frequency resources simultaneously; network technology that utilizes satellites, high-altitude platform stations (HAPS), etc. in an integrated manner; improved network structure to support mobile base stations, etc., and to enable network operation optimization and automation, etc.; dynamic spectrum sharing technology with conflict avoidance based on spectrum usage prediction: using artificial intelligence (AI) in wireless communications to improve overall network operations by utilizing AI from the design stage of developing 6G and internalizing end-to-end AI support functions; and next-generation distributed computing technology that overcomes the computing power limitations of user equipment (UE) through ultra-high performance communication and computing resources achievable on the network (such as mobile edge computing (MEC), cloud, etc.). In addition, attempts are continuing to strengthen connectivity between devices, optimize networks, promote software-based network entities, and increase openness of wireless communications by designing new protocols to be used in 6G communication systems, developing mechanisms for implementing hardware-based security environments and secure use of data, and developing technologies for maintaining privacy.

[0006] It is expected that the research and development of 6G communication systems including hyperconnectivity of person to machine (P2M) and machine to machine (M2M) will bring about the next hyperconnectivity experience. In particular, services such as truly immersive extended reality (XR), high-fidelity mobile holograms, and digital replicas are expected to be provided through 6G communication systems. In addition, services such as remote surgery, industrial automation, and emergency response for enhanced safety and reliability will be provided through 6G communication systems, making the technology applicable to various fields such as industry, healthcare, automobiles, and home appliances. Summary of the invention

[0007] According to at least one embodiment of the present disclosure, a method performed by a user equipment UE in a wireless communication system is provided, comprising: sending a first message to a first network node, wherein the first message indicates whether the UE has a capability related to supporting peak-to-average power ratio (PAPR) processing or the first message indicates whether the UE has a capability related to supporting subcarrier reservation (TR) technology; receiving a second message sent by the first network node, wherein the second message notifies the UE to use or not use the TR technology; when the TR technology is used according to the second message, determining information of reserved subcarriers, wherein the information of the reserved subcarriers includes at least one of a proportion, a quantity, and a position of the reserved subcarriers; determining an uplink signal based on the information of the reserved subcarriers; and sending the uplink signal.

[0008] In one implementation, the information of the reserved subcarrier is determined based on at least one of the following information: transmission bandwidth, subcarrier spacing, modulation coding scheme MCS, carrier waveform, power level, and resource block RB allocation method.

[0009] In one implementation, the preparation time of the uplink signal is related to the TR preparation time.

[0010] In one implementation, the TR preparation time is related to at least one of the following information: transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method.

[0011] In one implementation, the transmit power of the uplink signal is determined based on parameters related to a maximum power backoff MPR.

[0012] In one implementation, the MPR-related parameters are determined based on at least one of the following information: transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method.

[0013] In one implementation, the MPR-related parameter includes at least one of the following: a second MPR value, a second MPR offset value, wherein the second MPR value and / or the second MPR offset value are related to PAPR processing.

[0014] In one implementation, the first message further includes at least one of information about PAPR processing-related level parameters that the UE can support and information about MPR-related parameters that the UE can support.

[0015] In one implementation, the method further includes: receiving a third message sent by the first network node, wherein the third message includes at least one of the following: a PAPR processing-related level parameter indication, an MPR-related parameter indication, a PAPR processing-related parameter indication, and an MPR-related parameter indication.

[0016] In one implementation, the second message and the third message may be the same message.

[0017] In an implementation manner, the method further includes: receiving a third reconfiguration message sent by the first network node.

[0018] In one implementation, the method further includes: determining a PAPR processing-related level parameter based on the third message.

[0019] In one implementation, the method further includes: determining MPR-related parameters based on the third message to perform the uplink signal transmission.

[0020] According to at least one embodiment of the present disclosure, a method performed by a first network node in a wireless communication system is provided, comprising: receiving a first message from a user equipment UE, wherein the first message indicates whether the UE has a capability related to supporting peak-to-average power ratio PAPR processing or the first message indicates whether the UE has a capability related to supporting subcarrier reservation TR technology; sending a second message to the UE, wherein the second message notifies the UE to use or not use TR technology; receiving an uplink signal from the UE, wherein the uplink signal is determined based on information about reserved subcarriers, and the information about reserved subcarriers includes at least one of a proportion, a quantity, and a position of reserved subcarriers.

[0021] In one implementation, the power of the uplink signal is determined based on parameters related to a maximum power backoff MPR.

[0022] In one implementation, the MPR-related parameter includes at least one of the following: a second MPR value, a second MPR offset value, wherein the second MPR value and / or the second MPR offset value are related to PAPR processing.

[0023] In one implementation, the first message further includes at least one of information about PAPR processing-related level parameters that the UE can support and information about MPR-related parameters that the UE can support.

[0024] In one implementation, the method further includes: sending a third message to the UE, wherein the third message includes at least one of the following: a PAPR processing-related level parameter indication, an MPR-related parameter indication, a PAPR processing-related parameter indication, and an MPR-related parameter indication.

[0025] According to at least one embodiment of the present disclosure, a user equipment UE is provided, comprising: a transceiver configured to send and / or receive a signal; and a controller configured to control the UE to execute a method according to an embodiment of the present disclosure.

[0026] According to at least one embodiment of the present disclosure, there is provided a first network node, comprising: a transceiver configured to send and / or receive a signal; and a controller configured to control the first network node to execute a method according to an embodiment of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0028] Figure 2 An example base station according to an embodiment of the present disclosure is shown;

[0029] Figure 3 An example user device according to an embodiment of the present disclosure is shown;

[0030] Figure 4 A schematic diagram showing a method according to an embodiment of the present disclosure is shown;

[0031] Figure 5 An example of terminal-side behavior according to an embodiment of the present disclosure is shown;

[0032] Figure 6 An example of terminal-side behavior according to an embodiment of the present disclosure is shown;

[0033] Figure 7 An example of terminal-side behavior according to an embodiment of the present disclosure is shown;

[0034] Figure 8 An example of terminal-side behavior according to an embodiment of the present disclosure is shown;

[0035] Figure 9-11 A schematic diagram showing a processing method when the position of a reserved subcarrier conflicts with the position of a reference signal according to an embodiment of the present disclosure;

[0036] Figure 12-16 A schematic diagram showing the location of reserved subcarriers according to an embodiment of the present disclosure;

[0037] Fig.17 An example hardware block diagram of a communication device provided according to at least one embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0038] Before carrying out the following specific embodiments, it may be advantageous to set forth the definitions of certain words and phrases used throughout the patent document. The term "connection" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether those elements are in physical contact with each other. The terms "send", "receive" and "communicate" and their derivatives include both direct and indirect communication. The terms "include" and "include" and their derivatives mean unrestricted inclusion. The term "or" is compatible, meaning and / or. The phrase "associated with" and its derivatives mean including, included, interconnected with it, including, included, connected to or connected with it, coupled to or coupled with it, can communicate with it, collaborate with it, interweave, juxtapose, approach, be bound to or bound with it, have, have the property of, have to ... or have a relationship with ... etc. The term "controller" means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in a hardware manner or in a combination of hardware and software and / or firmware. The functionality associated with any particular controller, whether local or remote, may be centralized or distributed. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and only one item in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and only A, only B, only C. Likewise, the term "set" means one or more. Thus, a set of items may be a single item or a set of two or more items.

[0039] Moreover, various functions as described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, categories, instances, related data, or a portion thereof suitable for implementation in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. "Non-transitory" computer-readable media excludes wired, wireless, optical, or other communication links that convey instantaneous electrical signals or other signals. Non-transitory computer-readable media include media in which data can be permanently stored and media in which data can be stored and rewritten later, such as rewritable optical discs or erasable memory devices.

[0040] Definitions for certain other words and phrases are provided throughout this patent document. Those of skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

[0041] In communication systems, multi-carrier technology is widely used in wireless broadcasting and communication systems due to its strong ability to resist multipath interference and high spectrum utilization, such as orthogonal frequency-division multiplexing (OFDM), universal filtered-OFDM (UF-OFDM), filtered orthogonal frequency-division multiplexing (F-OFDM), generalized frequency division multiplexing (GFDM) and filter bank multicarrier offset-QAM (FBMC-OQAM). These multi-carrier technologies all have high peak-to-average power ratio (PAPR) because they all use Fourier transform-based modulation. High PAPR forces the signal to work in the linear region of the PA at the cost of large power back-off when the signal power is amplified by the power amplifier (PA) to ensure the output quality of the signal. On the one hand, this working mode leads to low energy utilization, because large power back-off actually improves the linearity of PA at the expense of DC power consumption. As one of the largest energy-consuming devices in wireless communication systems, the energy consumption of PA accounts for 50% to 80% of base stations in cellular networks. Green and low-carbon is the direction of future development of the communications industry, so reducing PAPR to improve PA energy efficiency is of vital significance to reducing the energy consumption of the entire network. On the other hand, when the signal uses PA for power amplification, large power back-off will limit the output power of PA, and then limit the transmission power of the signal. The limitation on the signal transmission power will further limit the coverage of the signal. Therefore, reducing PAPR to increase the transmission power of the signal is also of great significance to improving the coverage of the signal.

[0042] In order to reduce PAPR, some advanced technologies can be used to process data at the transmitting end and / or the receiving end, so as to ensure the receiving performance of the receiver while reducing PAPR. For example, tone reservation (TR) technology has good PAPR improvement performance and does not require additional processing at the receiving end. However, for the solution in which the number and position of reserved subcarriers are fixed, the number and position of reserved subcarriers cannot be flexibly adjusted according to the specific application scenario, which limits the improvement of PAPR and further limits the performance improvement in different application scenarios after adopting TR technology. In response to this problem, the present disclosure proposes a new signal transmission method, which can flexibly configure different proportions and / or quantities and / or positions of reserved subcarriers. Flexible configuration of the proportion, quantity and / or position of reserved subcarriers can achieve flexible adjustment of spectrum resources and power efficiency, which is fully suitable for different application scenarios. For example, in scenarios where bandwidth resources are abundant but there is a need to improve coverage, more reserved subcarriers can be used to reduce PAPR to increase transmission power and further improve coverage; in scenarios where bandwidth resources are abundant but power is limited, more reserved subcarriers can be used to reduce PAPR to improve power utilization and save power; but in scenarios where there is no need to improve coverage and / or power is sufficient but there is a need to improve spectrum utilization, the number of reserved subcarriers can be reduced to improve frequency utilization. This flexible configuration method is particularly suitable for millimeter wave communications and terahertz communications with extremely abundant spectrum resources.

[0043] It is understood that throughout the description of the present disclosure, subcarrier reservation (TR) technology is used as an example of a technology for reducing or adjusting the PAPR of a signal. It is understood that the technology and principles of the present disclosure can also be applied to other technologies for reducing or adjusting the PAPR of a signal. Moreover, in the present disclosure, for the convenience of description and to avoid redundancy, "PAPR reduction", "reducing PAPR" or similar expressions are used. It is understood that the principles of the present disclosure described in conjunction with such expressions can also be applied to various other processing or adjustments to PAPR, and are not limited to the adjustment form of reducing PAPR. In addition, the "TR technical parameters" mentioned in the present disclosure refer to the parameters involved in performing TR-related operations. In addition, the "terminal" described throughout the text can be used interchangeably with "user equipment", "UE", "mobile station", "subscriber", etc.

[0044] The figures and various embodiments used to describe the principles of the present disclosure are included herein for illustration only and should not be construed in any way as limiting the scope of the present disclosure. In addition, those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged wireless communication system.

[0045] The following Figures 1 to 17 Various embodiments of the present disclosure are described as being implemented in a wireless communication system. Figures 1 to 17 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably arranged communications system.

[0046] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0047] like Figure 1 As shown, the wireless network includes a base station (next generation nodeB, gNB or gNodeB) 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0048] The gNB 102 provides wireless broadband access to a network 130 for a plurality of first user equipments (UEs) within a coverage area 120 of the gNB 102. The plurality of first UEs include a UE 111 that may be located at a small business (SB); a UE 112 that may be located at an enterprise (E); a UE 113 that may be located at a WiFi hot spot (HS); a UE 114 that may be located at a first residence (R1); a UE 115 that may be located at a second residence (R2); and a UE 116 that may be a mobile device (M) such as a cellular phone, a wireless laptop, a wireless personal digital assistant (PDA), etc. The gNB 103 provides wireless broadband access to the network 130 for a plurality of second UEs within a coverage area 125 of the gNB 103. The plurality of second UEs include UE 115 and UE 116 and subscriber stations (SS, e.g., UEs) 117, 118, and 119. In some embodiments, one or more of gNBs 101-103 may communicate with each other and UEs 111-116 using existing wireless communication technologies, and one or more of UEs 111-119 may communicate directly with each other (e.g., UEs 117-119) using other existing or proposed wireless communication technologies.

[0049] Depending on the type of network, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmit point (TP), a transmit-receive point (TRP), an enhanced (or "evolved") base station (eNodeB or eNB), a 5G base station (gNB), a macro cell, a femto cell, a wireless fidelity (WiFi) access point (AP), or other wireless capable devices. A base station may provide wireless access according to one or more wireless communication protocols, such as 3GPP 5G new radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), high speed packet access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, various names of base station type devices and functions are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, the term "user equipment" (UE) may refer to any component such as a mobile station (MS), a subscriber station (SS), a remote terminal, a wireless terminal, a reception point, or a user device, etc. For convenience, various names of user equipment type devices and functions are used interchangeably in this patent document to refer to a remote wireless device that wirelessly accesses a BS regardless of whether the UE is a mobile device (such as a mobile phone or a smart phone) or a remote wireless device that is generally considered to be a fixed device (such as a desktop computer or a vending machine).

[0050] Dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as generally circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with a gNB, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the wireless environment associated with natural and artificial obstacles.

[0051] As described in more detail below, one or more of UEs 111-119 include circuitry, programming, or a combination thereof. In certain embodiments, one or more of gNBs 101-103 include circuitry, programming, or a combination thereof.

[0052] although Figure 1 An example of a wireless network is shown, but Figure 1Various changes may be made. For example, wireless network 100 may include any number of gNBs and any number of UEs in any suitable arrangement. Moreover, gNB 101 may communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 may communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks such as an external telephone network or other types of data networks.

[0053] Figure 2 An example base station according to an embodiment of the present disclosure is shown. Figure 2 The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs appear in a variety of configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0054] like Figure 2 As shown in FIG. 1 , gNB 102 includes multiple antennas 200a-200n, multiple radio frequency (RF) transceivers 201a-201n, transmit (TX) processing circuitry 203, and receive (RX) processing circuitry 204. gNB 102 also includes a controller / processor 205, a memory 206, and a backhaul or network interface 207.

[0055] The RF transceivers 201a-201n receive incoming RF signals from the antennas 200a-200n, such as signals sent by UEs in the network 100. The RF transceivers 201a-201n down-convert the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signals are sent to the RX processing circuit 204, which generates processed baseband signals by filtering, decoding and / or digitizing the baseband or IF signals. The RX processing circuit 204 sends the processed baseband signals to the controller / processor 205 for further processing.

[0056] TX processing circuit 203 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from controller / processor 205. TX processing circuit 203 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. RF transceivers 201a-201n receive the outgoing processed baseband or IF signals from TX processing circuit 203 and up-convert the baseband or IF signals to RF signals that are transmitted via antennas 201a-201n.

[0057] Controller / processor 205 may include one or more processors or other processing devices that control the overall operation of gNB 102. For example, controller / processor 205 may control the reception of forward channel signals and the transmission of reverse channel signals by RF transceivers 201a-201n, RX processing circuitry 204, and TX processing circuitry 203 in accordance with well-known principles. Controller / processor 205 may also support additional functionality, such as more advanced wireless communication functionality.

[0058] For example, the controller / processor 205 may support beamforming or directional routing operations in which outgoing signals from multiple antennas 200a-200n are weighted differently to effectively steer the outgoing signals in a desired direction. Any of a variety of other functions may be supported in the gNB 102 by the controller / processor 205.

[0059] The controller / processor 205 is also capable of executing programs and other processes, such as an operating system (OS), located in the memory 206. The controller / processor 205 can move data into or out of the memory 206 as required by the executing process.

[0060] The controller / processor 205 is also connected to a backhaul or network interface 207. The backhaul or network interface 207 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 207 may support communication over any appropriate (one or more) wired or wireless connections. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G, LTE, or LTE-A), the interface 207 may allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 207 may allow the gNB 102 to communicate over a wired or wireless local area network or over a wired or wireless connection to a larger network (such as the Internet). The interface 207 includes any appropriate structure that supports communication over a wired or wireless connection such as an Ethernet or RF transceiver.

[0061] Memory 206 is connected to controller / processor 205. A portion of memory 206 may include random access memory (RAM), and another portion of memory 206 may include flash memory or other read-only memory (ROM).

[0062] although Figure 2 An example of gNB 102 is shown, but the Figure 2 For example, gNB 102 may include any number of Figure 2 As a specific example, the access point may include multiple interfaces 207, and the controller / processor 205 may support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of TX processing circuitry 203 and a single instance of RX processing circuitry 204, the gNB 102 may include multiple instances of each (such as one for each RF transceiver). For example, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0063] Figure 3 An example user device according to an embodiment of the present disclosure is shown. Figure 3 The embodiment of UE 116 shown in FIG. 1 is for illustration only, and Figure 1 UEs 111-115 and 117-119 may have the same or similar configurations. However, UEs may appear in a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of the UE.

[0064] like Figure 3 As shown in FIG. 1 , UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a TX processing circuit 303, a microphone 304, and a receive (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller or processor 307, an input / output (I / O) interface (IF) 308, an input device 309, a touch screen display 310, and a memory 311. The memory 311 includes an OS 312 and one or more applications 313.

[0065] RF transceiver 302 receives incoming RF signals transmitted by a gNB of network 100 from antenna 301. RF transceiver 302 downconverts the incoming RF signals to generate an IF or baseband signal. The IF or baseband signal is sent to RX processing circuitry 305, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 305 sends the processed baseband signal to speaker 306 (such as for voice data) or processor 307 for further processing (such as for web browsing data).

[0066] The TX processing circuit 303 receives analog or digital voice data from the microphone 304 or other outgoing baseband data (such as web data, email, or interactive video game data) from the processor 307. The TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 302 receives the outgoing processed baseband or IF signal from the TX processing circuit 303 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 301.

[0067] The processor 307 may include one or more processors or other processing devices and executes the OS 312 stored in the memory 311 to control the overall operation of the UE 116. For example, the processor 307 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 302, the RX processing circuit 305, and the TX processing circuit 303 according to well-known principles. In some embodiments, the processor 307 includes at least one microprocessor or microcontroller.

[0068] The processor 307 is also capable of executing other processes and programs located in the memory 311, such as a process for CSI reporting on the uplink channel. The processor 307 can move data into or out of the memory 311 as needed to execute the process. In some embodiments, the processor 307 is configured to execute the application 313 based on the OS 312 or in response to a signal received from the gNB or operator. The processor 307 is also coupled to the I / O interface 308, which provides the UE 116 with the ability to connect to other devices such as laptops and portable computers. The I / O interface 308 is the communication path between these accessories and the processor 307.

[0069] Processor 307 is also connected to touch screen display 310. A user of UE 116 may use touch screen display 310 to enter data into UE 116. Touch screen display 310 may be a liquid crystal display, light emitting diode display, or other display capable of rendering text and / or at least limited graphics, such as from a website.

[0070] The memory 311 is connected to the processor 307. A portion of the memory 311 may include a RAM, and another portion of the memory 311 may include a flash memory or other ROM.

[0071] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in the embodiment may be combined, further subdivided, or omitted, and additional components may be added as required. As a specific example, processor 307 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although Figure 3 The UE 116 is shown configured as a mobile phone or smart phone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0072] According to at least one embodiment of the present disclosure, a method performed by a user equipment UE in a wireless communication system is provided, comprising: sending a first message to a first network node, wherein the first message indicates whether the UE has a capability related to supporting peak-to-average power ratio (PAPR) processing or the first message indicates whether the UE has a capability related to supporting subcarrier reservation (TR) technology; receiving a second message sent by the first network node, wherein the second message notifies the UE to use or not use the TR technology; when the TR technology is used according to the second message, determining information of reserved subcarriers, wherein the information of the reserved subcarriers includes at least one of a proportion, a quantity, and a position of the reserved subcarriers; determining an uplink signal based on the information of the reserved subcarriers; and sending the uplink signal.

[0073] In one implementation, the information of the reserved subcarrier is determined based on at least one of the following information: transmission bandwidth, subcarrier spacing, modulation coding scheme MCS, carrier waveform, power level, and resource block RB allocation method.

[0074] In one implementation, the preparation time of the uplink signal is related to the TR preparation time.

[0075] In one implementation, the TR preparation time is related to at least one of the following information: transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method.

[0076] In one implementation, the transmit power of the uplink signal is determined based on parameters related to a maximum power backoff MPR.

[0077] In one implementation, the MPR-related parameters are determined based on at least one of the following information: transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method.

[0078] In one implementation, the MPR-related parameter includes at least one of the following: a second MPR value, a second MPR offset value, wherein the second MPR value and / or the second MPR offset value are related to PAPR processing.

[0079] In one implementation, the first message further includes at least one of information about PAPR processing-related level parameters that the UE can support and information about MPR-related parameters that the UE can support.

[0080] In one implementation, the method further includes: receiving a third message sent by the first network node, wherein the third message includes at least one of the following: a PAPR processing-related level parameter indication, an MPR-related parameter indication, a PAPR processing-related parameter indication, and an MPR-related parameter indication.

[0081] In one implementation, the second message and the third message may be the same message.

[0082] In an implementation manner, the method further includes: receiving a third reconfiguration message sent by the first network node.

[0083] In one implementation, the method further includes: determining a PAPR processing-related level parameter based on the third message.

[0084] In one implementation, the method further includes: determining MPR-related parameters based on the third message to perform the uplink signal transmission.

[0085] According to at least one embodiment of the present disclosure, a method performed by a first network node in a wireless communication system is provided, comprising: receiving a first message from a user equipment UE, wherein the first message indicates whether the UE has a capability related to supporting peak-to-average power ratio PAPR processing or the first message indicates whether the UE has a capability related to supporting subcarrier reservation TR technology; sending a second message to the UE, wherein the second message notifies the UE to use or not use TR technology; receiving an uplink signal from the UE, wherein the uplink signal is determined based on information about reserved subcarriers, and the information about reserved subcarriers includes at least one of a proportion, a quantity, and a position of reserved subcarriers.

[0086] In one implementation, the power of the uplink signal is determined based on parameters related to a maximum power backoff MPR.

[0087] In one implementation, the MPR-related parameter includes at least one of the following: a second MPR value, a second MPR offset value, wherein the second MPR value and / or the second MPR offset value are related to PAPR processing.

[0088] In one implementation, the first message further includes at least one of information about PAPR processing-related level parameters that the UE can support and information about MPR-related parameters that the UE can support.

[0089] In one implementation, the method further includes: sending a third message to the UE, wherein the third message includes at least one of the following: a PAPR processing-related level parameter indication, an MPR-related parameter indication, a PAPR processing-related parameter indication, and an MPR-related parameter indication.

[0090] According to at least one embodiment of the present disclosure, a user equipment UE is provided, comprising: a transceiver configured to send and / or receive a signal; and a controller configured to control the UE to execute a method according to an embodiment of the present disclosure.

[0091] According to at least one embodiment of the present disclosure, a first network node is provided, comprising: a transceiver configured to send and / or receive a signal; and a controller configured to control the first network node to execute a method according to an embodiment of the present disclosure. According to one embodiment of the present disclosure, a method for uplink signal transmission in a wireless communication system is proposed, the method uses the PAPR of a time domain data signal to be processed to increase the transmit power of the signal. Specifically, the TR technology is used to reduce the PAPR. In one implementation, the number and / or position of reserved subcarriers are selected according to specific application conditions to implement the TR technology, so as to achieve flexible adjustment of the degree of reduction of the PAPR of the time domain data signal; further, after the signal PAPR is reduced, the maximum output power reduction (MPR) value will change accordingly, the power backoff of the PA can be reduced, the corresponding signal transmit power can be increased, and the working efficiency of the PA can be improved. The method proposed in the present invention can achieve flexible adjustment of spectrum resources and coverage and / or power efficiency.

[0092] The reserved subcarrier is a subcarrier reserved in the frequency domain for reducing the PAPR of the time domain signal. Specifically, the reserved subcarrier in the frequency domain is not used to send data information, and the signal sent is used to reduce the PAPR of the data information after it is converted from the frequency domain signal to the time domain signal.

[0093] The embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0094] Figure 4 A schematic diagram of a method according to an embodiment of the present disclosure is shown. Figure 4 As shown, the method comprises the following steps:

[0095] Step 401: The UE may send a first message to a first network node, wherein the first message indicates whether the UE has a capability related to supporting PAPR processing. For example, in one implementation, the first message may indicate whether the UE has a capability related to supporting TR technology.

[0096] Step 402: The UE may obtain second information, wherein the second information indicates whether the UE uses or does not use the TR technology. In one implementation, the second information is included in a second message; and

[0097] Step 403: The UE sends an uplink signal according to the second information.

[0098] It can be understood that the above steps 401 and 402 may be optional steps. In one embodiment, the second information of step 403 may be preset or obtained according to the second message received from the first network node. The preset manner of the second information is suitable for the scenario of using the TR technology by default or not using the TR technology; the second information is obtained based on the second message received from the first network node and is suitable for the scenario that the first network node configures the UE to work in different modes according to specific circumstances.

[0099] In one embodiment, when the UE uses the TR technology based on the second information, the UE may determine the information of the reserved subcarriers, wherein the information of the reserved subcarriers includes the proportion and / or quantity and / or position of the reserved subcarriers. Based on the information of the reserved subcarriers, the UE performs the TR technology to reduce the PAPR. The UE determines the information of the reserved subcarriers based on at least one of the following information: transmission bandwidth, subcarrier spacing, modulation and coding scheme (MCS), carrier waveform, power level, and RB allocation method. Wherein, MCS can be used to indicate the modulation mode, the power level value can be, for example, 1, 1.5, 2, 3, etc., the carrier waveform can be DFT-s-OFDM, CP-OFDM; the modulation mode can be Pi / 2BPSK, QPSK, 16QAM, 64QAM, 256QAM, 1024QAM and other modulation modes; the RB allocation mode can be edge RB allocation, external RB allocation, internal RB allocation; the subcarrier spacing factor μ can be 0, 1, 2, 3, 4, etc., corresponding to the subcarrier spacing of 15KHz, 30KHz, 60KHz, 120KHz, 240KHz, etc.; the channel bandwidth value can be 100MHz, 200MHz, 400MHz, 800MHz, 1600MHz, 2000MHz, etc. The specific implementation method of the UE determining the information of the reserved subcarrier can be to obtain the information of the reserved subcarrier according to a set of reserved subcarrier information determination conditions. The conditions for determining the set of reserved subcarrier information may be that the transmission bandwidth and / or the subcarrier spacing and / or the MCS and / or the carrier waveform and / or the power level and / or the RB allocation method are the above-mentioned specific values ​​or specific implementation methods. The corresponding PAPR reduction requirement can be obtained according to the conditions for determining the set of reserved subcarrier information.

[0100] In one implementation, a specific implementation of the reserved subcarrier information may be that, corresponding to the set of reserved subcarrier information determining conditions, the number of reserved subcarriers is a, and the positions of the reserved subcarriers are represented by a subcarrier index set {A1, A2, ..., Aa}. Another specific implementation of the reserved subcarrier information may also be that, corresponding to the set of reserved subcarrier information determining conditions, the ratio of reserved subcarriers is R, the total number of subcarriers may be determined according to the transmission bandwidth and the subcarrier spacing, and combined with the reserved subcarrier ratio R, the number of reserved subcarriers may be a, and the positions of the corresponding reserved subcarriers are represented by a subcarrier index set {A1, A2, ..., Aa}. The method of using reserved subcarrier indexes is simple and clear.

[0101] In one implementation, the information of the reserved subcarriers, a specific implementation of which can also be expressed by a formula, wherein the proportion and / or quantity and / or position of the reserved subcarriers are expressed as the result of a calculation formula for the transmission bandwidth and / or subcarrier spacing and / or MCS and / or carrier waveform and / or power level and / or RB allocation method.

[0102] For example, as shown in the following formula:

[0103] {Nptone,Pindex}=f(B,SCS,M,Wave,Pclass,RBalloc)

[0104] or

[0105] {Rptone,Pindex}=f(B,SCS,M,Wave,Pclass,RBalloc), or, Pindex can be determined by f(B,SCS,M,Wave,Pclass,RBalloc), and Nptone or Rptone can be obtained according to Pindex.

[0106] in

[0107] f: represents the calculation formula;

[0108] B: transmission bandwidth;

[0109] SCS: subcarrier spacing;

[0110] M: MCS;

[0111] Wave: carrier waveform;

[0112] Pclass: power level;

[0113] RBalloc: RB allocation method;

[0114] Rptone: the ratio of reserved subcarriers;

[0115] Nptone: number of reserved subcarriers;

[0116] Pindex: reserved subcarrier index.

[0117] That is, the number and index of reserved subcarriers are the calculation formula results of transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method; or, the ratio and index of reserved subcarriers are the calculation formula results of transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method; or, the number of reserved subcarriers is the calculation formula result of transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method. Using formulas to avoid table lookup can save memory resources.

[0118] The reserved subcarrier index position may be occupied by a reference signal, wherein the reference signal includes but is not limited to a demodulation reference signal (DMRS), a sounding reference signal (SRS), a phase tracking reference signal (PTRS), etc. When a conflict occurs between the reserved subcarrier and the reference signal, a specific implementation of the conflict handling method may be that the position belongs to the reference signal, and the reserved subcarrier is vacant at the position without additional processing, such as Fig. 9 This processing method is applicable to the scenario where there are a large number of reserved subcarriers and one more or one less reserved subcarrier has little impact on the execution of the TR technology.

[0119] In one implementation, when the reserved subcarrier index position conflicts with the reference signal, a specific implementation of the conflict handling method may also be that the position belongs to the reference signal, the reserved subcarrier is vacant at the position, and the reserved subcarrier occupies the adjacent subcarrier position of the position, wherein the adjacent subcarrier position may be close to the conflicting position, and its specific position may be the index number minus one position or the index number plus one position, such as Fig.10 or Fig.11 This processing method is applicable to the scenario where the number of reserved subcarriers is small and sufficient reserved subcarrier waveforms need to be reserved in the frequency domain.

[0120] The specific allocation method of the reserved subcarrier position in the frequency domain includes but is not limited to one of the following methods: random allocation, equal spacing allocation, and continuous allocation. The random allocation of the reserved subcarrier position in the frequency domain means that there is no restriction on the position index of the reserved subcarrier in the frequency domain, as long as the reserved subcarrier can meet the PAPR reduction requirement. This position allocation method is very flexible and can achieve the best allocation method for the reserved subcarrier corresponding to the time domain waveform.

[0121] The reserved subcarriers are equally spaced in the frequency domain, which means that the number of subcarriers with equal reserved subcarrier intervals is distributed in the frequency domain, and the corresponding PAPR reduction requirements need to be met. One of the specific implementation methods can be: Fig.12 As shown. The index number set of the reserved subcarrier position is

[0122]

[0123] in

[0124] N: number of subcarriers in the frequency domain;

[0125] W: number of reserved subcarriers;

[0126] δ: The starting offset position of the reserved subcarrier.

[0127] And the index number set satisfies P w ∈{0,1,…,N-1}, that is, the index number set is within the frequency domain bandwidth. This equally spaced reserved subcarrier placement method allows the reserved subcarriers to be evenly distributed, making it easier to find and calculate the subcarrier index number.

[0128] The reserved subcarriers are continuously allocated in the frequency domain, which means that the reserved subcarriers are concentrated in a section of subcarriers on the frequency domain resources, while meeting the corresponding PAPR reduction requirements. One of the specific implementation methods can be: Fig.13 or Fig.14 or Fig.15 As shown, the reserved subcarrier is located in any continuous subcarrier section on the frequency domain subcarrier, and the arbitrary section refers to any section that can be located inside the frequency domain subcarrier, such as Fig.13 As shown, or the upper or lower edge of the frequency domain subcarrier, as Fig.14 or Fig.15 As shown. The index number set of the reserved subcarrier is

[0129] P w ={δ,δ+1,…,δ+W-1}

[0130] in

[0131] W: number of reserved subcarriers;

[0132] δ: Starting offset position of the reserved subcarrier

[0133] And the index number set satisfies P w ∈{0,1,…,N-1}. In addition, the specific implementation of the continuous allocation can also be to distribute the upper and lower edges of the frequency domain subcarriers, such as Fig.16 As shown. The index number set of the reserved subcarrier is

[0134]

[0135] in

[0136] W: Number of reserved subcarriers

[0137] This method of placing subcarriers continuously is simple and easy to implement.

[0138] In one implementation, the specific implementation method of placing the reserved subcarriers in the frequency domain can also be placing them in a spectral mask. The spectral mask is located outside the effective spectrum, and the spectrum mask is used to send signals to eliminate the time domain peak of the effective data signal without occupying the effective data bandwidth. The specific manner of placing the reserved subcarriers on the spectrum mask also includes but is not limited to one of the following methods: random allocation, equidistant allocation, and continuous allocation. It is only necessary that these reserved subcarriers can meet the PAPR reduction requirements. The specific allocation methods of random allocation, equidistant allocation, and continuous allocation have been defined above and will not be repeated here.

[0139] In one implementation, the generation of an uplink signal based on the information of the reserved subcarrier needs to meet the TR preparation time. The UE determines the TR preparation time based on at least one of the following information: transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method. The specific meanings and example values ​​of the transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method have been defined above and will not be repeated here. The specific implementation method for the UE to determine the TR preparation time can be to obtain the TR preparation time based on a set of TR preparation time determination conditions. The set of TR preparation time determination conditions can be transmission bandwidth and / or subcarrier spacing and / or MCS and / or carrier waveform and / or power level and / or RB allocation method as corresponding specific values ​​or specific implementation methods. The set of TR preparation time determination conditions can correspond to the PAPR reduction requirements under the conditions.

[0140] In particular, the set of reserved subcarrier information determination conditions and the set of TR preparation time determination conditions may be the same condition.

[0141] One of the specific implementations of the TR preparation time may be the number of symbols at a corresponding subcarrier spacing. For the same TR preparation time (e.g., in nanoseconds), different numbers of symbols may correspond to different subcarrier spacings. For example, under a certain set of TR preparation time determination conditions, the specific implementation of the TR preparation time may be as shown in Table 7.

[0142] Table 7 TR preparation time under the conditions corresponding to a certain set of TR preparation time determination

[0143] μ TR preparation time [number of symbols] 0 TR0 1 TR1 2 TR2 3 TR3 …… ……

[0144] Wherein μ is the subcarrier spacing factor, and each μ value corresponds to a subcarrier spacing. Corresponding to a certain set of TR preparation time determination conditions, its TR preparation time (such as in nanoseconds) can be determined, and the specific representation of the TR preparation time is the number of symbols corresponding to the current subcarrier spacing. For example, corresponding to a certain set of TR preparation time determination conditions, its TR preparation time is TR0 symbols when μ is 0; and TR1 symbols when μ is 1. In addition, the number of time units of other granularities corresponding to the TR preparation time can also be determined, such as the number of sampling points, the number of time slots, etc.

[0145] Correspondingly, after receiving the DCI scheduling request, the preparation time for the UE to send a signal on the uplink shared channel (PUSCH) is:

[0146] T proc，2 =max(((N 2 +T+d 2，1 +d 2，2 )(2048+144)·κ2 -μ )·T c , d 2，3 )

[0147] in:

[0148] N 2 : Time parameters related to UE processing capabilities;

[0149] T: TR preparation time

[0150] d 2,1 : Time parameters related to DMRS allocation;

[0151] d 2,2 : Time parameters related to hybrid automatic repeat request;

[0152] κ: is a constant, equal to 64;

[0153] μ: subcarrier spacing factor;

[0154] T c : The minimum sampling interval of OFDM symbols.

[0155] By introducing the TR preparation time into the calculation of the preparation time of the uplink shared channel, the accuracy of the preparation time of the uplink shared channel can be improved.

[0156] When the UE performs the uplink signal transmission, the calculation of the signal transmission power can be based on MPR-related parameters. The MPR-related parameters include at least one of the following: a second MPR value, a second MPR offset value, wherein the second MPR value or / and the second MPR offset value are related to PAPR processing. The UE determines the MPR-related parameters based on at least one of the following information: MCS, channel bandwidth setting, subcarrier spacing, carrier waveform, power level, RB allocation method. Among them, MCS can be used to indicate the modulation method. The specific meanings and values ​​of the transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method have been defined above and will not be repeated here. The specific implementation method of the UE determining the MPR-related parameters can be to obtain the MPR-related parameters according to a set of MPR-related parameter determination conditions. Among them, the set of MPR-related parameter determination conditions can be the transmission bandwidth and / or subcarrier spacing and / or MCS and / or carrier waveform and / or power level and / or RB allocation method as corresponding specific values ​​or specific implementation methods. The set of MPR-related parameter determination conditions can correspond to the transmission power requirements under the conditions.

[0157] In an example, a specific implementation of MPR-related parameters is shown in Table 8 or Table 9. The UE determines the second MPR value or the second MPR offset value according to a combination of carrier waveform, modulation mode, subcarrier spacing, RB allocation mode, power level, and channel bandwidth settings. For example, when the power level is Y, the channel bandwidth is Z MHz, the subcarrier spacing factor is μ, the carrier waveform is DFT-s-OFDM, the modulation mode is Pi / 2BPSK, and the RB allocation mode is edge RB allocation, the corresponding second MPR in Table 8 is ≤x1 dB, or the second MPR is x1 dB, or the corresponding second MPR offset value in Table 9 is Δx1dB. The specific meanings and example values ​​of the transmission bandwidth, subcarrier spacing, modulation mode, carrier waveform, power level, and RB allocation mode have been defined above and will not be repeated here. The definitions of edge RB, external RB, internal RB, and area 1 and area 2 refer to standard 3GPP TS38.101.

[0158] Table 8 Second MPR value corresponding to power level Y

[0159]

[0160]

[0161] Table 9 Second MPR offset value corresponding to power level Y

[0162]

[0163]

[0164] In one implementation, a specific implementation of the UE calculating the signal transmission power based on the MPR-related parameters may be: the UE determines a condition according to the MPR-related parameters to obtain a second MPR value, and directly uses the MPR value to participate in the calculation of the transmission power.

[0165] In one implementation, a specific implementation method of the UE calculating the signal transmission power based on the MPR-related parameters can also be: the UE determines the conditions according to the MPR-related parameters to obtain the second MPR offset value, and the UE determines the MPR value based on the second MPR offset value to participate in the calculation of the transmission power. The specific calculation method for the UE to obtain the MPR value is the difference between the first MPR value and the second MPR offset value, wherein the first MPR value is the MPR value obtained when the UE does not consider the PAPR processing method, and in particular, the first MPR value is the MPR value obtained when the TR technology is not used. At this time, the second MPR offset value is not less than 0.

[0166] In one implementation, the signal transmission method, its specific steps include at least one of the following or a combination of two or more: the UE determines the reserved subcarrier information and / or TR preparation time; the UE performs the TR technology based on the reserved subcarrier information and / or TR preparation time; the UE determines the power calculation parameters related to PAPR processing, and uses the power calculation parameters to calculate the signal transmission power, and then sends the signal. The power calculation parameters can be MPR-related parameters. Using the signal transmission method, the UE can effectively reduce the PAPR of the time domain data signal and increase the signal transmission power, thereby improving the coverage and power efficiency.

[0167] In one implementation, before the UE determines the reserved subcarrier information and / or the TR preparation time, the UE may report a first message to the first network node in advance, wherein the first message indicates whether the UE has the capability to support PAPR processing, specifically, the first message may be whether the UE has the capability to support TR technology. A specific implementation of the definition of the first message can be shown in Table 1.

[0168] Table 1 Definition of the first message

[0169]

[0170] As shown in Table 1, the first message may indicate whether the UE supports capabilities related to TR technology. Specifically, the first message reported by the UE may be reported by UE, that is, the first message reported by the UE may be shared on all frequency bands. In addition, the first message reported by the UE may also be reported by frequency band and / or frequency band combination and / or bandwidth part, that is, the UE reports different first messages on different frequency bands and / or frequency band combinations and / or bandwidth parts. The UE may choose to report or not report the first message, that is, the parameter is not a mandatory reporting parameter. When the UE does not report the first message, the first message of the UE is a default value. The first message reported by the UE may be different on FDD and TDD, that is, the UE reports different first messages in FDD and TDD modes. The UE reports different first messages on the FR1 band and the FR2 band. For example, when the UE only supports the use of TR technology on the FR2 band but does not support the use of TR technology on the FR1 band, the UE reports different first message values ​​on the FR1 band and the FR2 band.

[0171] A specific implementation of the first message can be represented by 1 bit, with 0 and 1 representing that the UE does not have or has the capability to support TR technology, respectively. Specifically, 0 represents having the capability, 1 represents not having the capability; or 1 represents having the capability, 0 represents not having the capability.

[0172] The UE may obtain second information, wherein the second information indicates whether the UE uses TR technology or not. A specific implementation of the indication may be represented by 1 bit. 0 and 1 are used to indicate whether the UE uses or not TR technology, respectively. Specifically, 0 indicates the use of TR technology, and 1 indicates the non-use of TR technology; or 1 indicates the use of TR technology, and 0 indicates the non-use of TR technology. The second information may be preset, or may be obtained through a second message received from the first network node. The preset refers to a scenario in which TR technology is used or not by default according to specific application conditions. The specific application conditions include at least one of the following information: transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method. In a specific implementation, whether to use TR technology is determined based on the specific values ​​or implementations of the transmission bandwidth and / or subcarrier spacing and / or MCS and / or carrier waveform and / or power level and / or RB allocation method. The receiving from the first network node means that the first network node configures whether the UE uses the TR technology according to a specific application scenario, wherein the specific application scenario may be a scheduling requirement, etc. in addition to the specific values ​​or specific implementation methods of the above-mentioned transmission bandwidth and / or subcarrier spacing and / or MCS and / or carrier waveform and / or power level and / or RB allocation method. The second information is obtained by preset or obtained by receiving the second message from the first network node, so that the TR technology can be used flexibly in different situations.

[0173] In one implementation, the first message reported by the UE may also include at least one of the PAPR processing-related level or level parameter that the UE can support, the MPR-related level or level parameter that the UE can support, the PAPR processing-related parameter that the UE can support, and the MPR-related parameter that the UE can support. The PAPR processing-related level parameter that the UE can support is the degree of PAPR reduction that the UE can achieve when executing the TR technology. The MPR-related level parameter that the UE can support represents the degree to which the MPR can be reduced when the UE executes the TR technology, and further, the degree to which the signal transmission power can be increased. In one implementation, the degree of PAPR reduction indicates that the UE can select the TR technical parameter according to the PAPR processing-related level parameter, and the degree to which the PAPR can be reduced after the UE executes the TR technology based on the TR technical parameter. The TR technical parameter refers to the parameter involved in performing TR-related operations, for example, it may at least include reserved subcarrier information and / or TR preparation time. The degree to which the signal transmission power can be improved indicates that after the UE executes the TR technology, due to the reduction of PAPR, the MPR value is reduced while ensuring the signal output quality, and the output power of the PA is increased, thereby increasing the degree to which the signal transmission power can be improved. The signal output quality can be given by the error vector magnitude (EVM), for example. A specific implementation of the definition of the PAPR processing-related level parameters and the MPR-related level parameters can be shown in Tables 2 and 3.

[0174] Table 2 Definition of PAPR processing related level parameters

[0175]

[0176] Table 3 Definition of MPR related grade parameters

[0177]

[0178]

[0179] As shown in Table 2 or Table 3, the PAPR processing-related level parameter or the MPR-related level parameter represents the PAPR processing-related level parameter value or the MPR-related level parameter value that the UE can support. Specifically, the PAPR processing-related level parameter value or the MPR-related level parameter value reported by the UE can be reported by the UE, that is, a set of PAPR processing-related level parameter values ​​or MPR-related level parameter values ​​reported by the UE can be shared on all frequency bands. Among them, the set of PAPR processing-related level parameter values ​​or MPR-related level parameter values ​​indicates that there is at least one PAPR processing-related level parameter value or MPR-related level parameter value. In addition, the PAPR processing-related level parameter value or the MPR-related level parameter value reported by the UE can also be reported by frequency band and / or frequency band combination and / or bandwidth part, that is, the UE reports different PAPR processing-related level parameter values ​​or MPR-related level parameter values ​​on different frequency bands and / or frequency band combinations and / or bandwidth parts. The UE can choose to report or not report the PAPR processing-related level parameter value or the MPR-related level parameter value, that is, the level parameter is not a mandatory reporting parameter. When the UE does not report the PAPR processing-related level parameter value or the MPR-related level parameter value, the UE's PAPR processing-related level parameter value or the MPR-related level parameter value is a default value. The PAPR processing-related level parameter value or the MPR-related level parameter value reported by the UE distinguishes between FDD and TDD, that is, the UE reports different PAPR processing-related level parameter values ​​or MPR-related level parameter values ​​in FDD and TDD. The UE reports different PAPR processing-related level parameter values ​​or MPR-related level parameter values ​​in the FR1 frequency band and the FR2 frequency band.

[0180] In one implementation, the PAPR processing-related level parameter value reported by the UE may be one or more PAPR processing-related level parameter indexes supported by the UE. The MPR-related level parameter value reported by the UE may be one or more MPR-related level parameter indexes supported by the UE. The UE reports the PAPR processing-related level parameter value or the MPR-related level parameter value to facilitate the first network node to perform scheduling according to the capability level in combination with a specific application scenario.

[0181] In one implementation, when the PAPR processing-related level parameter value is a specific PAPR processing-related level parameter value, it means that the UE does not have the calculation capability of PAPR processing at this time, that is, the UE does not adopt the TR technology to reduce the PAPR of the signal; when the PAPR processing-related level parameter is not a specific PAPR processing-related level parameter, it means that the UE has the calculation capability of PAPR processing at this time. When the UE reports a PAPR processing-related level parameter value, the level parameter can represent the highest or lowest level of PAPR processing-related level parameter value that the UE can support. At this time, the UE can support all other PAPR processing-related level parameter values ​​not exceeding this level or the UE can support PAPR processing-related level parameter values ​​not lower than this level. When the UE reports a PAPR processing-related level parameter value, the parameter can also indicate that the UE can only support the PAPR processing-related level parameter value of this level at this time. Optionally, the higher the PAPR processing-related level parameter reported by the UE, the higher the PAPR reduction degree that the UE can support. Further, the UE can use a higher power to send signals, and vice versa. The different levels represented by the PAPR processing-related level parameter can be represented by numerical values, such as integers such as 0, 1, 2, etc., or by other methods that can distinguish different levels. In a specific embodiment, when the numerical value representing the level of the PAPR processing-related level parameter is higher, it means that the UE can support a stronger PAPR reduction capability at this time. Optionally, the value of the level parameter related to the specific PAPR processing can be, for example, 0. Alternatively, the different levels represented by the PAPR processing-related level parameter can be represented by letters, such as letters A, B, C, etc., in which case the value of the level parameter related to the specific PAPR processing can be A. Alternatively, the PAPR processing-related level parameter can also be represented by other suitable methods that can distinguish different levels, as long as level 1, level 2, etc. can be distinguished. When the UE reports multiple PAPR processing-related level parameter values, it can indicate that the UE can support the multiple PAPR processing-related level parameter values ​​at this time. Such a reporting method of the UE allows the first network node to give instructions in combination with specific application scenarios to facilitate the signal transmission of the UE, and can save signal overhead.

[0182] In one implementation, the PAPR processing-related level parameter corresponds to a set of parameter sets, and the parameter set includes at least one of the following parameters: PAPR reduction value or PAPR reduction range, proportion and / or number of reserved subcarriers, position of reserved subcarriers, TR preparation time. For a certain PAPR processing-related level parameter, there is a corresponding set of PAPR reduction values ​​and / or reserved subcarrier proportion values ​​and / or number of reserved subcarriers and / or reserved subcarrier positions and / or TR preparation time. The UE determines the PAPR processing-related level parameter value and the corresponding parameter set based on at least one of the following information: MCS, transmission bandwidth, subcarrier spacing, carrier waveform, power level, RB allocation method. MCS, especially the modulation method corresponding to MCS, determines EVM, that is, signal output quality. Transmission bandwidth and subcarrier spacing determine the number of subcarriers in the frequency domain. In addition, MCS, transmission bandwidth, carrier waveform, power level, RB allocation method, etc. all affect signal transmission power. Since the purpose of reducing PAPR is to increase signal transmission power while ensuring signal output quality, the combination of information conditions will also affect the ability to reduce PAPR. The UE reports level parameters related to PAPR processing, and the first network node may perform parameter configuration of the UE according to the reported level.

[0183] Specifically, for a level parameter related to PAPR processing of a certain level, the PAPR reduction value or PAPR reduction range represents the PAPR reduction amount that the UE can support at the level, that is, the PAPR reduction level that the UE can support. The larger the value, the stronger the ability of the UE to reduce PAPR after performing TR operation.

[0184] For a level parameter related to PAPR processing of a certain level, the reserved subcarrier ratio value represents the ratio of reserved subcarriers in the frequency domain subcarriers at this level, that is, when executing the TR technology, the ratio of subcarriers that can be used as reserved subcarriers to participate in TR calculation in a given frequency domain subcarrier resource. The larger the ratio value, the more reserved subcarriers participating in TR calculation under a given frequency domain subcarrier resource. It is worth noting that the number of reserved subcarriers depends on the number of frequency domain subcarriers and the ratio of reserved subcarriers.

[0185] For a certain level of PAPR processing-related level parameters, the position of the reserved subcarrier refers to the specific position of the allocated reserved subcarrier in a given frequency domain subcarrier. Since the position of the reserved subcarrier in the frequency domain can affect its waveform in the time domain, it can affect the effect of eliminating the peak of the time domain signal. The specific implementation method of the position of the reserved subcarrier can be a set of frequency domain subcarrier position indexes under corresponding position conditions, and / or a subcarrier index calculation formula. The position condition involves at least one of the following parameters: transmission bandwidth, subcarrier spacing, the ratio of reserved subcarriers or the number of reserved subcarriers, MCS, carrier waveform, power level, and RB allocation method. Among them, the transmission bandwidth and the subcarrier spacing determine the number of frequency domain subcarriers, and further, the number of frequency domain subcarriers and the ratio of reserved subcarriers determine the number of reserved subcarriers.

[0186] For a level parameter related to PAPR processing of a certain level, the TR preparation time represents the time required to execute the TR technology corresponding to the level. The longer the time is, the longer the preparation time required for signal transmission is, and vice versa.

[0187] In one embodiment, there may be several groups of reserved subcarrier ratios and / or reserved subcarrier positions and / or TR preparation times corresponding to the same PAPR processing-related level parameter value and / or the same PAPR reduction range. For example, corresponding to a certain PAPR processing-related level parameter value, a larger proportion of reserved subcarriers may be used on a given spectrum resource, or a more appropriate reserved subcarrier position may be selected, so that the TR operation may be completed in a shorter processing time. This method is suitable for scenarios with abundant spectrum resources and / or abundant UE memory resources and / or abundant UE operation processing units, and allows the UE to achieve PAPR reduction in a shorter processing time to achieve low-latency communication. Corresponding to the same PAPR processing-related level parameter value, a smaller proportion of reserved subcarriers may be used on a given spectrum resource, or a simple and easy-to-operate reserved subcarrier position may be allocated on the spectrum, but more processing time is required to complete the TR operation. This method is suitable for scenarios with insufficient spectrum resources and / or insufficient UE memory resources and / or insufficient UE operation processing units, and the TR operation is completed at the cost of more processing time.

[0188] In one embodiment, the parameters affecting the TR preparation time involve at least one of the following: the operation speed of the UE, the operation time required for performing a single time domain peak elimination, the number of iterations of the time domain peak elimination, and the threshold of the time domain peak elimination. The operation speed of the UE determines the time of the basic operation of the UE; the operation time required for performing a single time domain peak elimination and / or the number of iterations of the time domain peak elimination determine the iterative operation time in the TR technology, wherein the operation time required for performing a single time domain peak elimination is related to the memory size of the UE and / or the number of operation processing units of the UE. The larger the memory of the UE and / or the more operation processing units of the UE, the more memory and / or operation processing units the UE can use when performing a single time domain peak elimination operation, and process data in parallel, saving operation time at the cost of resources. Conversely, the UE can use less memory and / or operation processing units, and process data in series, saving resources at the cost of time. In addition, the operation speed of the UE also affects the operation time required for performing a single time domain peak elimination; the threshold of the time domain peak elimination affects the number of iterations, and ultimately affects the processing time of the TR technology.

[0189] In one implementation, a specific implementation of the PAPR processing-related level parameter may be that a set of PAPR reduction values ​​and / or a proportion of reserved subcarriers and / or a number of reserved subcarriers and / or a position of reserved subcarriers and / or a TR preparation time corresponds to a PAPR processing-related level parameter value. As shown in Table 4. In Table 4, when the UE's PAPR processing-related level parameter is level 0, the corresponding PAPR reduction value is R0, the proportion of reserved subcarriers is C0%, the position of reserved subcarriers is P0, and the TR preparation time is T0; when the UE's PAPR processing-related level parameter is level 1, the corresponding PAPR reduction value is R1, the proportion of reserved subcarriers is C1%, the position of reserved subcarriers is P1, and the TR preparation time is T1, and so on. When the PAPR processing-related level parameter is a specific PAPR processing-related level parameter, such as level 0, the PAPR reduction value is 0, the proportion of reserved subcarriers is 0, the position of reserved subcarriers is empty, and the TR preparation time is 0, that is, the UE does not support the use of TR operation at this time. The PAPR reduction values ​​R0, R1, R2, etc. can be 0 dB, 0.5 dB, 1 dB, etc. The proportion of reserved subcarriers C0%, C1%, C2%, can be 0%, 1%, 2%, etc. The positions of reserved subcarriers P0, P1, P2 correspond to different subcarrier index sets and / or subcarrier index calculation formulas. It is worth noting that the columns in Table 4, such as the PAPR reduction values, are optional.

[0190] Table 4 PAPR processing related level parameters and PAPR reduction value, reserved subcarrier ratio, reserved subcarrier position and TR preparation time

[0191]

[0192] In one implementation, a specific implementation of the PAPR processing-related level parameter may be that the same PAPR processing-related level parameter value corresponds to more than one group of reserved subcarrier ratios and / or the number of reserved subcarriers and / or the positions of reserved subcarriers and / or TR preparation time. This implementation represents that a PAPR reduction range can be implemented in multiple ways. At this time, the PAPR processing-related level parameter value can be further subdivided into levels to correspond to multiple groups of the parameters. As shown in Table 5, when the PAPR processing-related level parameter is level Z, different reserved subcarrier ratios and / or reserved subcarrier positions and / or TR preparation times can be combined for this level, thereby further subdividing levels Z0, Z1,…. For example, corresponding to level Z0, a combination of a reserved subcarrier ratio of CZ0%, a reserved subcarrier position of PZ0, and a TR preparation time of TZ0 can be used to achieve the PAPR reduction range of the level. Corresponding to level Z1, a combination of a reserved subcarrier ratio of CZ1%, a reserved subcarrier position of PZ1, and a TR preparation time of TZ1 can be used to achieve the PAPR reduction range of the level, and so on. Specifically, a larger proportion of subcarriers or a more appropriate reserved subcarrier position and a shorter TR preparation time can be used to perform the TR technology, or a smaller proportion of subcarriers or a simple and easy-to-operate reserved subcarrier position and a longer TR preparation time can be used to perform the TR technology. PAPR processing-related level parameters Z0, Z1, ... all correspond to the same PAPR reduction capability, but use different time domain or frequency domain resource combinations.

[0193] Table 5: Ratio of reserved subcarriers, positions of reserved subcarriers and TR preparation time corresponding to level Z of PAPR processing related level parameters

[0194]

[0195] In one implementation, the first message reported by the UE includes a supported MPR-related level parameter. When the MPR-related level parameter is a specific MPR-related level parameter value, it means that the UE does not have the MPR processing capability at this time; when the MPR-related level parameter is not a specific MPR-related level parameter value, it means that the UE can support MPR-related processing operations at this time, thereby increasing the transmit power. When the UE reports an MPR-related level parameter value, the level parameter may represent the highest or lowest level of MPR-related level parameter value that the UE can support. At this time, the UE can support all other MPR-related level parameter values ​​not exceeding this level or the UE can support MPR-related level parameter values ​​not lower than this level. When the UE reports an MPR-related level parameter value, the parameter may also indicate that the UE can only support the MPR-related level parameter value of this level at this time. Optionally, the higher the MPR-related level parameter reported by the UE, the higher the MPR reduction degree that the UE can support, and further, the UE can use a higher power to send signals, and vice versa. The different levels represented by the MPR-related level parameter can be expressed by numerical values, such as integers such as 0, 1, 2, etc., or by other methods that can distinguish different levels. In a specific embodiment, when the numerical value representing the MPR-related level parameter is higher, it means that the UE can support a stronger MPR reduction capability at this time. Optionally, the specific MPR-related level parameter value can be, for example, 0. Alternatively, the different levels represented by the MPR-related level parameter can be expressed by letters, such as letters A, B, C, etc., in which case the specific MPR-related level parameter value can be A. Alternatively, the MPR-related level parameter can also be expressed in other suitable ways that can distinguish different levels, as long as level 1, level 2, etc. can be distinguished. When the UE reports multiple MPR-related level parameter values, it can indicate that the UE can support the multiple MPR-related level parameter values ​​at this time. Such a reporting method of the UE allows the first network node to give instructions in combination with the specific application scenario to facilitate the signal transmission of the UE, and can save signal overhead.

[0196] In one implementation, the MPR-related level parameter corresponds to a certain level of MPR-related parameters, i.e., a second MPR value and / or a second MPR offset value. The UE determines the MPR-related level parameter value and the corresponding parameters based on the information condition combination. The information condition combination includes at least one of the following parameters: MCS, transmission bandwidth, subcarrier spacing, carrier waveform, power level, RB allocation method, PAPR processing-related level or level parameter, PAPR processing-related parameters. Under different information condition combinations, the UE may have different MPR improvement capabilities. Under the same information condition combination, since the TR technology can adopt different reserved subcarrier ratios and / or quantities and / or positions and / or TR preparation times, the corresponding MPR improvement capabilities may also be different.

[0197] In one implementation, a specific implementation of the MPR-related level parameter may be that one MPR-related level parameter value corresponds to one second MPR value and / or second MPR offset value. Based on the second MPR value and / or second MPR offset value, the UE may calculate the transmit power of the signal.

[0198] In one embodiment, the UE may obtain a third message from the first network node, wherein the third message includes at least one of the following: a PAPR processing related level parameter indication, an MPR related level parameter indication, a PAPR processing related parameter, and an MPR related parameter. The method for the UE to obtain the third message includes at least one of the following: obtaining the third message by parsing a downlink control channel, obtaining the third message by parsing high-level signaling, and obtaining the third message by parsing the media access control information of a downlink shared channel. Optionally, the third message may be transmitted through a dynamic setting of downlink control information (DCI) or a semi-static setting of RRC signaling. In one implementation, when the UE does not receive the third message from the first network node, the UE may adopt a preset value of a PAPR processing related level parameter and / or an MPR related level parameter, or may determine the PAPR processing related parameter and the MPR related parameter according to at least one of the transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method as described above without determining according to the PAPR processing related level parameter and / or the MPR related level parameter. In one embodiment, the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication can be represented by an integer, such as 0, 1, 2, etc., or can be represented by other methods that can distinguish level 0, level 1, level 2, etc., such as A, B, C, etc.

[0199] In one embodiment, the second message and the third message received by the UE from the first network node may be the same message. For example, when the PAPR processing-related level parameter indication in the third message received by the UE from the first network node is a specific PAPR processing-related level parameter indication and / or the MPR-related level parameter indication in the third message received by the UE from the first network node is a specific MPR-related level parameter indication, the first network node notifies the UE not to use the TR technology; when the PAPR processing-related level parameter indication in the third message received by the UE from the first network node is not a specific PAPR processing-related level parameter indication and / or the MPR-related level parameter indication in the third message received by the UE from the first network node is not a specific MPR-related level parameter indication, the first network node notifies the UE to use the TR technology.

[0200] In one implementation, the UE may receive a reconfigured third message sent from the first network node. This situation is applicable to the situation where the first network node dynamically adjusts the third message according to the application environment or application requirement changes when the application environment or application requirement changes.

[0201] In one embodiment, the UE can know the PAPR processing-related level parameter value indicated by the first network node according to the third message, and can determine at least one of the following parameters according to the PAPR processing-related level parameter value: PAPR reduction value or PAPR reduction range, proportion and / or number of reserved subcarriers, location of reserved subcarriers, TR preparation time. In this way, the information of the reserved subcarriers can be determined, so that uplink signal transmission is performed based on the information of the reserved subcarriers. At the same time, the generation of uplink signals based on the information of the reserved subcarriers needs to meet the TR preparation time. The specific method of the operation has been described above and will not be repeated here.

[0202] In one embodiment, the UE can know the MPR-related level parameter value indicated by the first network node based on the third message, and can confirm the second MPR value and / or the second MPR offset value based on the MPR-related level parameter, and calculate the signal transmission power to transmit the uplink signal.

[0203] In one implementation, the UE side performs at least one of the following steps: the UE reports a first message to the first network node; the UE obtains a second message or second information and / or a third message; the UE reports a fourth message to the first network node, wherein the fourth message includes a PAPR processing-related level parameter value and / or an MPR-related level parameter value selected by the UE for calculation, or includes a PAPR processing-related parameter or an MPR-related parameter determined by the UE for PAPR processing; the UE selects TR technical parameters to perform TR technology according to the information related to PAPR processing included in the fourth message; the UE calculates the signal transmission power according to the MPR-related information included in the fourth message, and uses the power to send a signal to the first network node. The selected PAPR processing-related level parameter and / or MPR-related level parameter included in the fourth message may be a preset value, or may be determined according to the third message from the first network node, or may be a PAPR processing-related level parameter and / or MPR-related level parameter that the UE itself can support. The signal transmission power is the transmission power of the signal after the PAPR is reduced by performing the TR technology. In one implementation, the transmission power is obtained by backing off the power of the PAPR-reduced signal by a second MPR value and / or a second MPR offset value obtained according to an MPR-related level parameter. Different combinations of signaling interaction steps are suitable for different application scenarios.

[0204] In one implementation, a specific implementation of the UE side behavior is as follows: Figure 5 As shown. Among them,

[0205] Step 1 (optionally): the UE reports a first message to the first network node;

[0206] Step 2 (optional): The UE obtains a second message or second information and / or receives a third message;

[0207] Step 3 (optionally): the UE reports a fourth message to the first network node;

[0208] Step 4: The UE selects TR technical parameters according to the fourth message to perform the TR technology;

[0209] Step 5: The UE calculates the transmit power according to the second MPR value and / or the second MPR offset value obtained from the fourth message, and uses the power to send a signal to the first network node.

[0210] Wherein, the order of step 3 and step 4 can be exchanged without affecting the beneficial effects of the present disclosure. Wherein, in step 3, the UE reports to the first network node the level parameters related to the PAPR processing selected for calculation in order to inform the first network node of the proportion and / or quantity and / or position of reserved subcarriers, so that the first network node can remove the reserved subcarriers when extracting valid data information. In particular, it is optional for the UE to report to the first network node the level parameters related to the PAPR processing selected for calculation. When the UE does not report the selected parameters to the first network node, it is assumed that the first network node knows that the UE has selected the level parameters related to the PAPR processing selected for calculation.

[0211] In a specific implementation, when the UE does not obtain the third message from the first network node, the UE selects TR technical parameters to perform TR technology according to preset values ​​of parameters related to PAPR processing and / or parameters related to MPR that may be included in the third message, so as to be applicable to the scenario where the UE and the first network node have a default processing method for level parameters related to PAPR processing and / or level parameters related to MPR. In an example, a specific implementation of the UE side behavior is as follows Figure 6 As shown. Among them,

[0212] Step 1 (optionally): the UE reports a first message to the first network node;

[0213] Step 2 (optionally): the UE obtains second information. In one implementation, the second information is included in a second message.

[0214] Step 3 (optionally): the UE reports a fourth message to the first network node;

[0215] Step 4: The UE selects TR technical parameters according to the fourth message to perform the TR technology;

[0216] Step 5: The UE calculates the transmit power according to the second MPR value and / or the second MPR offset value obtained from the fourth message, and uses the power to send a signal to the first network node.

[0217] The order of step 3 and step 4 can be exchanged without affecting the beneficial effects of the present disclosure. The scenario in which the UE does not obtain the PAPR processing-related level parameter indication from the first network node may be a scenario in which the first network node does not send the PAPR processing-related level parameter indication to the UE, or a scenario in which the first network node sends the PAPR processing-related level parameter indication to the UE, but the UE does not obtain the parameter for some reason.

[0218] In a specific implementation, when the UE reports a first message to the first network node and obtains a second message from the first network node, the UE selects TR technical parameters to execute the TR technology based on the obtained PAPR processing-related level parameter indication, so as to be applicable to the case where the UE lets the first network node know the UE's support capability for the PAPR processing-related level parameter, so as to allow the first network node to select the applicable PAPR processing-related level parameter indication according to the specific application scenario. In particular, if the UE obtains a group of PAPR processing-related level parameter indications from the first network node, the UE may use the highest or lowest level supported by the UE in the group of PAPR processing-related level parameters to select TR technical parameters to execute the TR technology. In one example, a specific implementation of the UE-side behavior is as follows. Figure 7 As shown. Among them,

[0219] Step 1: The UE reports a first message to the first network node;

[0220] Step 2: The UE obtains the second message and / or the third message from the first network node;

[0221] Step 3 (optionally): the UE reports the selected fourth message to the first network node;

[0222] Step 4: The UE selects TR technical parameters according to the fourth message to perform the TR technology;

[0223] Step 5: The UE calculates the transmit power according to the second MPR value and / or the second MPR offset value obtained from the fourth message, and uses the power to send a signal to the first network node.

[0224] The order of step 3 and step 4 can be exchanged without affecting the beneficial effects of the present disclosure.

[0225] In a specific implementation, when the UE does not report the first message to the first network node, but obtains the second message and / or the third message from the first network node, the UE selects the PAPR processing-related level parameters and / or MPR-related level parameters to participate in the calculation based on its own PAPR processing-related level parameters and / or MPR-related level parameters support, selects TR technical parameters according to the PAPR processing-related level parameters to execute TR technology, and selects the second MPR value and / or the second MPR offset value according to the MPR-related level parameters to participate in the calculation of the transmit power. The specific selection method is that when the UE does not support the PAPR processing-related level parameters and / or MPR-related level parameters indicated by the first network node, the UE adopts the default PAPR processing-related level parameters and / or MPR-related level parameters; when the UE supports the PAPR processing-related level parameters and / or MPR-related level parameters indicated by the first network node, the UE adopts the PAPR processing-related level parameters and / or MPR-related level parameters obtained from the first network node. In particular, if the UE obtains a set of PAPR processing related level parameter indications and / or MPR related level parameter indications from the first network node, the UE may use the highest or lowest level parameter supported by the UE in the PAPR processing related level parameter indications.

[0226] In a specific implementation, the UE may report the PAPR processing-related level parameters and / or MPR-related level parameters selected by itself to the first network node, or may not report the PAPR processing-related level parameters and / or MPR-related level parameters selected by itself to the first network node. The UE reporting the PAPR processing-related level parameters and / or MPR-related level parameters selected by itself to the first network node is applicable to the scenario where the first network node sends a set of PAPR processing-related level parameter indications and / or MPR-related level parameter indications, and the UE selects one of them; or the UE does not support the PAPR processing-related level parameters and / or MPR-related level parameter indications indicated by the first network node, and the UE adopts the default PAPR processing-related level parameters and / or MPR-related level parameters. In particular, the default PAPR processing-related level parameters and / or MPR-related level parameters adopted by the UE can be a specific PAPR processing-related level parameter value and / or a specific MPR-related level parameter value, that is, the UE does not adopt the TR technology to reduce the PAPR of the signal; it can also be the highest or lowest level of PAPR processing-related level parameters and / or MPR-related level parameters that the UE itself can support. The situation in which the UE does not report its selected PAPR processing-related level parameters and / or MPR-related level parameters to the first network node is applicable to the scenario in which the UE obtains a PAPR processing-related level parameter indication and / or an MPR-related level parameter indication from the first network node, and the UE supports the PAPR processing-related level parameters and / or the MPR-related level parameters, and the UE selects the PAPR processing-related level parameters and / or the MPR-related level parameters to participate in the calculation.

[0227] The method is applicable to the scenario where the first network node is unaware of the support capability of the UE's PAPR processing related level parameter and / or MPR related level parameter and gives an indication, and the UE selects appropriate PAPR processing related level parameter and / or MPR related level parameter according to its own capability combined with the PAPR processing related level parameter indication and / or MPR related level parameter indication from the first network node. In an example, a specific implementation of the UE side behavior is as follows Figure 8 As shown. Among them,

[0228] Step 1: The UE obtains the second message and / or the third message from the first network node;

[0229] Step 2 (optionally): the UE reports a fourth message to the first network node;

[0230] Step 3: The UE selects TR technical parameters according to the fourth message to perform the TR technology;

[0231] Step 4: The UE calculates the transmit power according to the second MPR value and / or the second MPR offset value obtained from the fourth message, and uses the power to send a signal to the first network node.

[0232] In one embodiment, the manner in which the UE obtains the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication may be explicit or implicit. A specific implementation manner of explicitly obtaining the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication may be that the UE directly obtains the indication. A specific implementation manner of implicitly obtaining the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication may be that the UE implicitly obtains the indication through the relationship between the two indications after directly obtaining one of the two indications. The UE implicitly obtains the unknown parameter indication through the corresponding relationship between the PAPR processing-related level parameter indication and the MPR-related level parameter indication, which can save signaling overhead. The manner in which the UE directly obtains the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication may be determined according to the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication received from the first network node, or may be preset.

[0233] In one implementation, a specific implementation of the relationship between the PAPR processing related level parameter indication and the MPR related level parameter indication may be one-to-one, that is, one PAPR processing related level parameter corresponds to one MPR related level parameter. Such a one-to-one correspondence relationship can obtain an unknown parameter indication when the UE obtains any one of the PAPR processing related level parameter indication and the MPR related level parameter indication, which is simple and clear.

[0234] In one implementation, a specific implementation of the relationship between the PAPR processing related level parameter indication and the MPR related level parameter indication can also be many-to-one, that is, multiple PAPR reduction calculation level parameters correspond to one MPR related level parameter. Such a many-to-one correspondence is applicable to the scenario where, after the UE obtains the PAPR processing related level parameter indication, the MPR related level parameter is obtained according to the implicit correspondence, that is, the MPR improvement effect achieved by the corresponding implementation of multiple sets of TR technical parameters is consistent.

[0235] In one implementation, a specific implementation of the relationship between the PAPR processing related level parameter indication and the MPR related level parameter indication can also be one-to-many, that is, one PAPR processing related level parameter corresponds to multiple MPR related level parameters. Such a one-to-many correspondence relationship is applicable to the scenario where the UE obtains the MPR related level parameter indication and obtains the PAPR processing related level parameter according to the implicit correspondence relationship, that is, the scenario where multiple groups of MPR related level parameters can be implemented using the same set of TR technical parameters.

[0236] In one implementation, the specific implementation method of the UE presetting to obtain the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication can be that the PAPR processing-related level parameter and / or the MPR-related level parameter indication are given by association with a specific parameter set. The specific parameter set includes at least one of the following parameters: MCS, transmission bandwidth, subcarrier spacing, carrier waveform, power level, and RB allocation method. Under a certain parameter set, the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication can be determined accordingly. In this way, the UE only needs to report a first message to inform the first network node whether the UE has the ability to support TR technology, and the first network node can determine the PAPR processing-related level parameter and / or the MPR-related level parameter supported by the UE under the current specific parameter set. The first network node sends a second message to the UE to indicate the use of TR technology, and the UE can determine the PAPR processing-related level parameter and / or the MPR-related level parameter according to the current specific parameter set, participate in TR calculation and / or MPR value calculation, and further obtain the transmission power and send the signal out. That is, for a set of specific parameter sets, the corresponding PAPR processing-related level parameter indication and / or MPR-related level parameter indication are determined. A specific implementation method for the UE to preset and obtain the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication can be shown in Table 11, wherein the modulation mode is determined by the MCS. When the power level is Y, the channel bandwidth is Z MHz, the subcarrier spacing is μ, the carrier waveform is DFT-s-OFDM, the modulation mode is Pi / 2BPSK, and the RB allocation mode is edge RB allocation, the PAPR processing-related level parameter indication and / or the MPR-related level parameter indication is X1 level. The specific meanings and values ​​of the transmission bandwidth, subcarrier spacing, modulation mode, carrier waveform, power level, and RB allocation mode have been defined above and will not be repeated here. Table 11 PAPR processing-related level parameter indication and / or MPR-related level parameter indication with power level Y, channel bandwidth = Z MHz, and subcarrier spacing of μ

[0237]

[0238]

[0239] Correspondingly, the behavior on the first network node side includes at least one of the following steps: the first network node receives a first message reported by the UE; the first network node sends a second message and / or a third message to the UE; the first network node receives a fourth message; the first network node receives an uplink signal and ignores the data on the reserved subcarrier.

[0240] It is worth noting that the PAPR processing-related level parameter definitions and indications in the uplink signal transmission method disclosed in the present invention, including specific parameter contents such as PAPR reduction value, the proportion or number of reserved subcarriers, the location of reserved subcarriers, TR preparation time, etc., as well as the corresponding specific implementation methods, conflict handling mechanisms can be applied to downlink signal transmission.

[0241] It can be understood that, although the above description is mainly described by taking the UE performing PAPR processing and sending an uplink signal as an example, the principle of the technology described in this way can also be applied to the situation where the network node performs PAPR processing and sends a downlink signal, or the relay node performs PAPR processing and sends an uplink signal or a downlink signal through some adaptive changes. For example, in the case where the network node sends a downlink signal through the above technology, the network node can send the PAPR processing-related parameters and / or MPR-related parameters to the UE, and use the PAPR processing-related parameters and / or MPR-related parameters to process and send the downlink signal. Alternatively, the network node can also determine the PAPR processing-related parameters and / or MPR-related parameters to be used based on the PAPR-related configuration information of the UE to be received, and use the PAPR processing-related parameters and / or MPR-related parameters to perform PAPR processing and sending of the downlink signal, where, for example, the configuration information can affect the PAPR of the UE's transmitted signal, and the configuration information is at least one of the transmission bandwidth, subcarrier spacing, modulation and coding scheme MCS, carrier waveform, power level, resource block RB allocation method, etc. as described above.

[0242] On the other hand, according to an embodiment of the present disclosure, a method for downlink signal transmission in a wireless communication system is proposed. In one implementation, the behavior of the first network node side includes at least one of the following steps: the first network node sends a PAPR processing-related level parameter indication to the UE; the first network node performs a TR technology to reduce the PAPR of the transmitted signal; the first network node calculates the active power and sends the signal. The various alternative implementations of the above optional steps of the method and the corresponding implementation details are the same or similar to the previously described embodiments and are not repeated here.

[0243] Correspondingly, the UE side behavior includes at least one of the following: the UE obtains a level parameter indication related to PAPR processing, wherein the acquisition indication method may be preset or an indication from the first network node; the UE receives a signal and ignores the data on the reserved subcarrier according to the level parameter indication related to PAPR processing. The various alternative implementations of the above optional steps of the method and the corresponding implementation details are the same or similar to the previously described embodiments and are not repeated here.

[0244] Fig.17 An example hardware block diagram of a communication device 1700 according to an embodiment of the present disclosure is shown.

[0245] refer to Fig.17 , the communication device 1700 may include a transceiver 1701 and a controller 1702 .

[0246] The transceiver 1701 may be configured to transmit and / or receive data and / or signals.

[0247] The controller 1702 may be a dedicated integrated circuit or at least one processor. The controller 1702 may be configured to control the overall operation of the communication device, and to control the communication device to implement the method proposed in the embodiment of the present disclosure. For example, in one implementation, the communication device is a user equipment (UE) or UE. For example, in another implementation, the communication device is a network side device, such as a first network node, a relay station, etc.

[0248] Those skilled in the art will appreciate that the above illustrative embodiments are described herein and are not intended to be limiting. It should be understood that any two or more of the embodiments disclosed herein may be combined in any combination. In addition, other embodiments may be utilized and other changes may be made without departing from the spirit and scope of the subject matter presented herein. It will be readily understood that the various aspects of the invention of the present disclosure as generally described herein and shown in the accompanying drawings may be arranged, replaced, combined, separated and designed in a variety of different configurations, all of which are contemplated herein.

[0249] Those skilled in the art will appreciate that the various illustrative logic boxes, modules, circuits, and steps described in the present application can be implemented as hardware, software, or a combination of the two. To clearly illustrate this interchangeability of hardware and software, various illustrative components, boxes, modules, circuits, and steps are described generally in the form of their function sets above. Whether such function sets are implemented as hardware or software depends on specific applications and the design constraints imposed on the overall system. Technicians can implement the described function sets in different ways for each specific application, but such design decisions should not be interpreted as causing a departure from the scope of the present application.

[0250] The various illustrative logic blocks, modules, and circuits described in this application may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0251] The steps of the method or technology described in this application can be directly embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software module can reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium can be integrated into a processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a UE. In an alternative, the processor and the storage medium can reside in a UE as discrete components.

[0252] In one or more exemplary designs, the functions may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include both computer storage media and communication media, the latter including any media that facilitates the transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general or special purpose computer.

[0253] The above description is merely an exemplary embodiment of the present disclosure and is not intended to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A method performed by a user equipment UE in a wireless communication system, comprising: Sending a first message to a first network node, wherein the first message indicates whether the UE has a capability related to supporting peak-to-average power ratio (PAPR) processing or the first message indicates whether the UE has a capability related to supporting subcarrier reservation (TR) technology; receiving a second message sent by the first network node, wherein the second message notifies the UE to use or not use the TR technology; When the TR technology is used according to the second message, determine information of reserved subcarriers, wherein the information of the reserved subcarriers includes at least one of a ratio, a quantity, and a position of the reserved subcarriers; Determine an uplink signal based on the information of the reserved subcarrier; Sending the uplink signal.

2. The method according to claim 1, wherein: The information of the reserved subcarrier is determined based on at least one of the following information: Transmission bandwidth, subcarrier spacing, modulation and coding scheme MCS, carrier waveform, power level, and resource block RB allocation method.

3. The method according to claim 1, wherein: The preparation time of the uplink signal is related to the TR preparation time.

4. The method according to claim 3, wherein: The TR preparation time is related to at least one of the following information: Transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method.

5. The method according to claim 1, wherein: The transmission power of the uplink signal is determined based on parameters related to the Maximum Power Backoff MPR.

6. The method according to claim 5, wherein: The MPR-related parameters are determined based on at least one of the following information: Transmission bandwidth, subcarrier spacing, MCS, carrier waveform, power level, and RB allocation method.

7. The method according to claim 5, wherein: The MPR-related parameters include at least one of the following: a second MPR value, a second MPR offset value, wherein the second MPR value and / or the second MPR offset value are related to PAPR processing.

8. The method according to claim 1, wherein: The first message further includes at least one of a PAPR processing related level parameter that the UE can support and information about an MPR related parameter that the UE can support.

9. The method according to claim 1, further comprising: A third message sent by the first network node is received, wherein the third message includes at least one of the following: a PAPR processing related level parameter indication, an MPR related level parameter indication, a PAPR processing related parameter indication, and an MPR related parameter indication.

10. The method according to claim 9, wherein: The second message and the third message may be the same message.

11. The method according to claim 9, further comprising: A third reconfiguration message sent by the first network node is received.

12. The method according to claim 9, further comprising: A PAPR processing related level parameter is determined based on the third message.

13. The method according to claim 9, further comprising: An MPR-related parameter is determined based on the third message to perform the uplink signal transmission.

14. A method performed by a first network node in a wireless communication system, comprising: Receiving a first message from a user equipment UE, wherein the first message indicates whether the UE has a capability related to supporting peak-to-average power ratio PAPR processing or the first message indicates whether the UE has a capability related to supporting subcarrier reservation TR technology; Sending a second message to the UE, wherein the second message notifies the UE to use or not use the TR technology; An uplink signal is received from the UE, wherein the uplink signal is determined based on information about reserved subcarriers, and the information about reserved subcarriers includes at least one of a ratio, a quantity, and a position of reserved subcarriers.

15. The method according to claim 14, wherein: The power of the uplink signal is determined based on parameters related to the Maximum Power Backoff MPR.

16. The method according to claim 15, wherein: The MPR-related parameters include at least one of the following: a second MPR value, a second MPR offset value, wherein the second MPR value and / or the second MPR offset value are related to PAPR processing.

17. The method according to claim 14, wherein: The first message further includes at least one of a PAPR processing related level parameter that the UE can support and information about an MPR related parameter that the UE can support.

18. The method according to claim 14, further comprising: A third message is sent to the UE, wherein the third message includes at least one of the following: a PAPR processing related level parameter indication, an MPR related parameter indication, a PAPR processing related parameter indication, and an MPR related parameter indication.

19. A user equipment UE, comprising: a transceiver configured to transmit and / or receive signals; A controller is configured to control the UE to execute the method according to any one of claims 1-13.

20. A first network node, comprising: a transceiver configured to transmit and / or receive signals; A controller is configured to control the first network node to execute the method according to any one of claims 14-18.

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