Signal transmission method and apparatus

Abstract

Provided in the present application are a signal transmission method and apparatus, which can improve the uplink coverage capability of a communication apparatus. The method comprises: a first communication apparatus receiving first information from a second communication apparatus, wherein the first information indicates at least one first subcarrier; and the first communication apparatus sending a first signal on the at least one first subcarrier, and sending a second signal on at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used for adjusting the peak-to-average power ratio of signals transmitted on a plurality of uplink scheduled subcarriers, the transmit power of the first signal is determined on the basis of the transmit power of the second signal and a power threshold value, the time unit for sending the first signal is the same as the time unit for sending the second signal, and the plurality of uplink scheduled subcarriers include the at least one first subcarrier and the at least one second subcarrier.

Description

Methods and apparatus for signal transmission

[0001] This application claims priority to Chinese Patent Application No. 202411613839.2, filed on November 12, 2024, entitled "Method and Apparatus for Signal Transmission", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more specifically, to a method and apparatus for signal transmission. Background Technology

[0003] In recent years, with the continuous development of 5G communication systems, data transmission latency has been continuously reduced and transmission capacity has been increasing. 5G communication systems have gradually penetrated into some multimedia services with strong real-time requirements and large data capacity requirements, such as video transmission, cloud gaming (CG), extended reality (XR), and intelligent robots. Among them, XR includes virtual reality (VR) and augmented reality (AR).

[0004] The uplink coverage capability of new radio (NR) cannot meet the high data volume, low latency, and high reliability requirements of multimedia services such as XR and intelligent robots. The main reasons for the limited uplink coverage include: limited transmit power of terminal devices, resulting in a lower signal-to-noise ratio (SNR); secondly, the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) waveforms is high, and in order for the power amplifier (PA) to operate in the linear region, the transmit power needs to be backed down, which further reduces the transmit power of the terminal devices. Summary of the Invention

[0005] This application provides a signal transmission method and apparatus that can improve the uplink coverage capability of communication devices.

[0006] In a first aspect, a method for signal transmission is provided, which can be applied to a first communication device, such as being executed by the first communication device. The first communication device can be a terminal device or a module (e.g., a circuit, chip, chip system, or processor) in the terminal device, or it can be a logic node, logic module, or software that can realize all or part of the functions of the terminal device.

[0007] The method includes: receiving first information indicating at least one first subcarrier; transmitting a first signal on the at least one first subcarrier; transmitting a second signal on the at least one second subcarrier, the second signal being a signal carrying uplink data; the first signal being used to adjust the peak-to-average power ratio of signals transmitted on multiple uplink scheduled subcarriers; the transmit power of the first signal being determined based on the transmit power of the second signal and a power threshold value; the time unit for transmitting the first signal being the same as the time unit for transmitting the second signal being the same; and the multiple subcarriers including the at least one first subcarrier and the at least one second subcarrier.

[0008] Based on the above technical solution, the first communication device transmits a first signal on at least one first subcarrier (a reserved subcarrier) and transmits a second signal carrying uplink data on at least one second subcarrier (uplink-scheduled subcarriers other than the reserved subcarriers). The first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple uplink-scheduled subcarriers, which can avoid the signals transmitted on the multiple uplink-scheduled subcarriers having a high PAPR, thereby eliminating the need to reduce the transmission power of the signal carrying uplink data and improving the uplink coverage capability of the first communication device.

[0009] In conjunction with the first aspect, in certain implementations of the first aspect, the adjusted peak-to-average power ratio is less than or equal to a preset threshold. Based on this optional implementation, high PAPR of signals transmitted on multiple subcarriers of uplink scheduling can be avoided, without reducing the transmit power of the signal carrying uplink data, thereby improving the uplink coverage capability of the first communication device.

[0010] In conjunction with the first aspect, some implementations of the first aspect further include: sending second information, the second information indicating information about a desired reserved subcarrier, the first information being determined based on the second information. Based on this optional implementation, the second communication device can determine the first information (at least one first subcarrier / reserved subcarrier) based on the second information sent by the first communication device.

[0011] In conjunction with the first aspect, in certain implementations of the first aspect, the information regarding the desired reserved subcarriers includes information about at least one set of desired reserved subcarriers. This first information includes information about a first set of desired reserved subcarriers, which includes the at least one first subcarrier. Based on this optional implementation, the second communication device determines a first set of desired reserved subcarriers from the at least one set of desired reserved subcarriers, based on the information about the at least one set of desired reserved subcarriers. The subcarriers included in the first set of desired reserved subcarriers are the aforementioned at least one first subcarrier.

[0012] In conjunction with the first aspect, in certain implementations of the first aspect, the information regarding the desired reserved subcarriers includes the number of desired reserved subcarriers, or the ratio of the total bandwidth of the desired reserved subcarriers to the total bandwidth of the plurality of subcarriers. Based on this optional implementation, the second communication device determines the number of subcarriers the first communication device desires to reserve based on the information regarding the desired reserved subcarriers (second information); the number of at least one first subcarrier indicated by the second communication device using the first information is equal to the number of subcarriers the first communication device desires to reserve.

[0013] In conjunction with the first aspect, in certain implementations of the first aspect, the first information includes information about the first subcarrier or the last subcarrier among the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, the first information includes information corresponding to each of the at least one first subcarrier; or, the first information includes information about at least one reserved set of subcarriers, wherein the at least one reserved set of subcarriers includes the at least one first subcarrier. Based on this optional implementation, the first communication device can determine the resources of at least one first subcarrier according to the first information.

[0014] Secondly, a signal transmission method is provided, which can be applied to a second communication device, such as being executed by the second communication device, which can be a network device or a module (e.g., a circuit, chip, chip system or processor) in the network device, or a logical node, logical module or software that can realize all or part of the functions of the network device.

[0015] The method includes: transmitting first information, the first information indicating at least one first subcarrier; receiving a first signal on the at least one first subcarrier; receiving a second signal on the at least one second subcarrier, the second signal being a signal carrying uplink data; the first signal being used to adjust the peak-to-average power ratio of signals transmitted on multiple uplink scheduled subcarriers; the transmit power of the first signal being determined based on the transmit power of the second signal and a power threshold value; the time unit for receiving the first signal being the same as the time unit for receiving the second signal; and the multiple subcarriers including the at least one first subcarrier and the at least one second subcarrier.

[0016] The method provided in the second aspect is the method on the second communication device side corresponding to the first aspect, and its beneficial effects can be referred to the first aspect.

[0017] In conjunction with the second aspect, in some implementations of the second aspect, the adjusted peak-to-average power ratio is less than or equal to a preset threshold.

[0018] In conjunction with the second aspect, some implementations of the second aspect further include: receiving second information, the second information indicating information about a subcarrier to be reserved, the first information being determined based on the second information.

[0019] In conjunction with the second aspect, in some implementations of the second aspect, the information of the desired reserved subcarriers includes information of at least one set of desired reserved subcarriers, the first information includes information of a first set of desired reserved subcarriers, the first set of desired reserved subcarriers includes the at least one first subcarrier, and the at least one set of desired reserved subcarriers includes the first set of desired reserved subcarriers.

[0020] In conjunction with the second aspect, in some implementations of the second aspect, the information on the desired reserved subcarriers includes the number of desired reserved subcarriers, or the ratio of the total bandwidth of the desired reserved subcarriers to the total bandwidth of the plurality of subcarriers.

[0021] In conjunction with the second aspect, in some implementations of the second aspect, the first information includes information about the first subcarrier or the last subcarrier among the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, the first information includes information corresponding to each of the at least one first subcarrier; or, the first information includes information about at least one reserved set of subcarriers, wherein the at least one reserved set of subcarriers includes the at least one first subcarrier.

[0022] Thirdly, a communication device is provided, which can be the first communication device described in the first aspect. The communication device includes: a transceiver module for receiving first information, the first information indicating at least one first subcarrier; the transceiver module is further configured to transmit a first signal on the at least one first subcarrier and transmit a second signal on at least one second subcarrier, the second signal being a signal carrying uplink data, the first signal being used to adjust the peak-to-average power ratio of signals transmitted on multiple uplink scheduled subcarriers, the transmit power of the first signal being determined based on the transmit power of the second signal and a power threshold value, the time unit for transmitting the first signal being the same as the time unit for transmitting the second signal, and the multiple subcarriers including the at least one first subcarrier and the at least one second subcarrier.

[0023] In conjunction with the third aspect, in some implementations of the third aspect, the adjusted peak-to-average power ratio is less than or equal to a preset threshold.

[0024] In conjunction with the third aspect, in some implementations of the third aspect, the transceiver module is further configured to send second information, the second information indicating information about a subcarrier to be reserved, the first information being determined based on the second information.

[0025] In conjunction with the third aspect, in some implementations of the third aspect, the information of the desired reserved subcarriers includes information of at least one set of desired reserved subcarriers, the first information includes information of a first set of desired reserved subcarriers, the first set of desired reserved subcarriers includes the at least one first subcarrier, and the at least one set of desired reserved subcarriers includes the first set of desired reserved subcarriers.

[0026] In conjunction with the third aspect, in some implementations of the third aspect, the information on the desired reserved subcarriers includes the number of desired reserved subcarriers, or the ratio of the total bandwidth of the desired reserved subcarriers to the total bandwidth of the plurality of subcarriers.

[0027] In conjunction with the third aspect, in some implementations of the third aspect, the first information includes information about the first subcarrier or the last subcarrier among the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, the first information includes information corresponding to each of the at least one first subcarrier; or, the first information includes information about at least one reserved set of subcarriers, wherein the at least one reserved set of subcarriers includes the at least one first subcarrier.

[0028] Fourthly, a communication device is provided, which can be the second communication device described in the second aspect, the communication device comprising: a transceiver module for transmitting first information, the first information indicating at least one first subcarrier;

[0029] The transceiver module is further configured to receive a first signal on the at least one first subcarrier and a second signal on the at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple subcarriers scheduled for uplink, the transmit power of the first signal is determined based on the transmit power of the second signal and a power threshold value, the time unit for receiving the first signal is the same as the time unit for receiving the second signal, and the multiple subcarriers include the at least one first subcarrier and the at least one second subcarrier.

[0030] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the adjusted peak-to-average power ratio is less than or equal to a preset threshold.

[0031] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the transceiver module is further configured to receive second information, the second information indicating information about a subcarrier to be reserved, the first information being determined based on the second information.

[0032] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the information of the desired reserved subcarriers includes information of at least one set of desired reserved subcarriers, the first information includes information of a first set of desired reserved subcarriers, the first set of desired reserved subcarriers includes the at least one first subcarrier, and the at least one set of desired reserved subcarriers includes the first set of desired reserved subcarriers.

[0033] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the information on the desired reserved subcarriers includes the number of desired reserved subcarriers, or the ratio of the total bandwidth of the desired reserved subcarriers to the total bandwidth of the plurality of subcarriers.

[0034] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first information includes information about the first subcarrier or the last subcarrier among the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, the first information includes information corresponding to each of the at least one first subcarrier; or, the first information includes information about at least one reserved set of subcarriers, wherein the at least one reserved set of subcarriers includes the at least one first subcarrier.

[0035] Fifthly, a communication device is provided, comprising: a processor configured to implement the method as described in the first aspect or any possible implementation thereof. Optionally, the communication device further comprises an interface circuit configured to receive signals from other communication devices and transmit them to the processor, or to send signals from the processor to other communication devices.

[0036] A sixth aspect provides a communication device comprising: a processor configured to implement the methods of the second aspect or any possible implementation thereof. Optionally, the communication device further comprises an interface circuit configured to receive signals from other communication devices and transmit them to the processor, or to send signals from the processor to other communication devices.

[0037] A seventh aspect provides a communication system comprising a first communication device for performing the method as described in the first aspect, and a second communication device for performing the method as described in the second aspect.

[0038] Eighthly, a computer-readable storage medium is provided, the computer-readable medium storing a computer program; when the computer program is executed by a processor, the methods of the first or second aspect and any possible implementation thereof are performed.

[0039] Ninthly, a computer program product is provided, the computer program product comprising a computer program that, when executed, causes the methods of the first or second aspect and any possible implementation thereof to be performed.

[0040] The solutions provided in the third to ninth aspects above are used to implement or cooperate with the methods provided in the first or second aspects above, and therefore can achieve the same or corresponding beneficial effects as the first or second aspects, which will not be elaborated here. Attached Figure Description

[0041] Figure 1 is a schematic diagram of the architecture of the communication system applicable to the embodiments of this application;

[0042] Figure 2 is a schematic diagram of the communication structure between terminal devices and network devices;

[0043] Figure 3 is an example diagram of an open radio access network (open RAN, O-RAN, or ORAN) system;

[0044] Figure 4 is a schematic diagram of the codebook-based precoding process;

[0045] Figure 5 is a schematic diagram of a non-codebook-based precoding process;

[0046] Figure 6 is a schematic diagram of the average transmit power before and after power back-off;

[0047] Figure 7 is a schematic flowchart of a signal transmission method provided in an embodiment of this application;

[0048] Figure 8 is a schematic block diagram of a communication device provided in an embodiment of this application;

[0049] Figure 9 is a schematic block diagram of another communication device provided in an embodiment of this application;

[0050] Figure 10 is a schematic block diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0051] The technical solution provided in this application will now be described with reference to the accompanying drawings.

[0052] The embodiments of this application can be applied to various communication systems, such as sidelink communication systems, vehicle-to-everything (V2X) systems, wireless local area network (WLAN) systems, narrowband internet of things (NB-IoT) systems, global system for mobile communications (GSM) systems, enhanced data rate for GSM evolution (EDGE) systems, wideband code division multiple access (WCDMA) systems, code division multiple access 2000 (CDMA2000) systems, time division-synchronization code division multiple access (TD-SCDMA) systems, long term evolution (LTE) systems, satellite communication systems, 5th generation (5G) systems, or future communication network systems, etc.

[0053] Figure 1 is a schematic diagram of the architecture of the communication system applicable to the embodiments of this application. The communication system includes RAN 100 and core network (CN) 200. RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110) and at least one terminal device (120a-120j in Figure 1, collectively referred to as 120). RAN may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). Terminal device 120 is wirelessly connected to RAN node 110. RAN node 110 is wirelessly or wired connected to core network 200. The core network device in core network 200 and RAN node 110 in RAN 100 can be different physical devices, or they can be the same physical device integrating core network logical functions and wireless access network logical functions.

[0054] RAN 100 can be a cellular system related to the 3rd Generation Partnership Project (3GPP), such as 4G, 5G mobile communication systems, non-terrestrial network (NTN) systems, or future communication network systems. RAN 100 can also be O-RAN, cloud radio access network (CRAN), or wireless fidelity (WiFi) systems, or a communication system that integrates two or more of the above systems.

[0055] The terminal device 120 involved in the embodiments of this application can also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, transportation vehicles with wireless communication capabilities, communication modules, etc. The embodiments of this application do not limit the form of the terminal device. Terminal devices typically contain communication modules, circuits, or chips that perform corresponding communication functions. The terminal device can also be configured with program instructions for performing corresponding communication functions.

[0056] The RAN node 110 involved in this embodiment can also be called an access network device, RAN entity, or access node, etc., and constitutes part of the communication system to help terminal devices achieve wireless access. Multiple RAN nodes 110 in the communication system 1000 can be nodes of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal device 120 are relative. For example, network element 120i in Figure 1 can be a helicopter or drone, which can be configured as a mobile base station. For terminal devices 120j that access RAN 100 through network element 120i, network element 120i is a base station; but for base station 110a, network element 120i is a terminal. RAN node 110 and terminal device 120 are sometimes referred to as communication devices. For example, network elements 110a and 110b in Figure 1 can be understood as communication devices with base station functions, and network elements 120a-120j can be understood as communication devices with terminal functions.

[0057] In one possible scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), or a base station in a future communication network system. The RAN node can be a macro base station (as shown in Figure 1, 110a), a micro base station or indoor station (as shown in Figure 1, 110b), a relay node or donor node, or a radio controller in a CRAN scenario. Optionally, the RAN node can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU). All or part of the functions of the RAN node in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (e.g., a cloud platform). The RAN node can also be equipped with communication modules, circuits, or chips that perform corresponding communication functions. The RAN node can also be configured with program instructions for performing corresponding communication functions and corresponding program instructions. The RAN node in this application can also be a logical node, logical module, or software that can implement all or part of the functions of the RAN node.

[0058] In another possible scenario, multiple RAN nodes collaborate to assist terminal devices in achieving wireless access, with different RAN nodes implementing some of the base station's functions. For example, RAN nodes can be CUs, DUs, CUs (control plane, CP), CUs (user plane, UP), or radio units (RUs). CUs and DUs can be set up separately or included in the same network element, such as the baseband unit (BBU). CU and DU nodes separate the gNB's protocol layers; some protocol layer functions are centrally controlled by the CU, while the remaining partial or complete protocol layer functions are distributed in the DU, which is centrally controlled by the CU. As one implementation, the CU deploys the RRC layer, Packet Data Convergence Protocol (PDCP) layer, and Service Data Adaptation Protocol (SDAP) layer from the protocol stack; the DU deploys the radio link control (RLC) layer, media access control (MAC) layer, and physical layer (PHY) from the protocol stack. Therefore, the CU has RRC, PDCP, and SDAP processing capabilities. The DU has RLC, MAC, and PHY processing capabilities. It is understood that the above functional division is merely an example and does not constitute a limitation on the CU and DU. The RU can be included in radio frequency equipment or radio frequency units, such as in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0059] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an O-RAN system, CU can also be called O-CU (Open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0060] The communication between each network device and each terminal device in the communication system shown in Figure 1 can also be represented in another form. Figure 2 is a schematic diagram of the structure for communication between terminal devices and network devices. Terminal device 10 includes a processor 101, a memory 102, and a transceiver 103. Transceiver 103 includes a transmitter 1031, a receiver 1032, and an antenna 1033. Network device 20 includes a processor 201, a memory 202, and a transceiver 203. Transceiver 203 includes a transmitter 2031, a receiver 2032, and an antenna 2033. Receiver 1032 can be used to receive information through antenna 1033, and transmitter 1031 can be used to send information to network device 20 through antenna 1033. Transmitter 2031 can be used to send information to terminal device 10 through antenna 2033, and receiver 2032 can be used to receive information sent by terminal device 10 through antenna 2033.

[0061] Figure 3 is an example diagram of an open radio access network (open RAN, O-RAN, or ORAN) system. An O-RAN system may include components other than those shown in Figure 3. As shown in Figure 3, access network devices (e.g., eNB, gNB, or next-generation access network devices) communicate with the core network (CN) via a backhaul link and with terminal devices via an air interface.

[0062] Specifically, the baseband unit (BBU) in the access network equipment communicates with the core network via a backhaul link, and the radio unit (RU) in the access network equipment communicates with at least one terminal device via an air interface. The BBU communicates with at least one RU via a fronthaul link. The BBU and RU may or may not be co-located.

[0063] The BBU includes at least one control unit (CU) and at least one DU, which can communicate via at least one midhaul link.

[0064] There is an interface between the DU and RU. Depending on the functions of the DU and RU, and / or the different switching methods, the interface between the DU and RU can be a common public radio interface (CPRI) or an enhanced common public radio interface (eCPRI).

[0065] To facilitate understanding of the technical solutions of the embodiments of this application, the terms and concepts involved in the embodiments of this application are explained below.

[0066] PAPR: The ratio of peak power to average power, also known as peak-to-average power ratio.

[0067] To facilitate understanding of the embodiments of this application, the technical solutions related to the embodiments of this application will be briefly introduced below.

[0068] Figure 4 is a schematic diagram of the codebook-based precoding process. The specific process is as follows:

[0069] 1. The terminal device sends a sounding reference signal (SRS) to the base station;

[0070] 2. Based on the measurement results of SRS, the base station selects a precoding matrix from the codebook set predefined by the protocol, where the codebook set is a codebook set known to both the base station and the terminal equipment.

[0071] 3. The base station sends a precoding matrix indicator (PMI) to the terminal equipment through downlink control information (DCI) scheduled by uplink. The PMI indicates the precoding matrix selected by the base station.

[0072] 4. The terminal equipment uses the precoding matrix indicated by PMI to precode the uplink data to be transmitted;

[0073] 5. The terminal device sends precoded uplink data to the base station through the physical uplink shared channel (PUSCH).

[0074] Figure 5 is a schematic diagram of the precoding process based on a non-codebook. The specific process is as follows:

[0075] 1. The base station sends a channel state information reference signal (CSI-RS) to the terminal equipment;

[0076] 2. The terminal equipment calculates the uplink precoding matrix based on the CSI-RS measurement results and the reciprocity of the uplink and downlink channels;

[0077] 3. The terminal equipment uses the uplink precoding matrix to precode one or more SRS signals and then sends one or more precoded SRS signals.

[0078] 4. The base station receives the SRS signal from the terminal device and selects the optimal uplink precoding matrix from the uplink precoding matrices based on the measurement results of the SRS signal.

[0079] 5. The base station indicates the sounding reference signal resource index (SRI) to the terminal device, which is associated with an uplink precoding matrix determined by the terminal device.

[0080] 6. The terminal device uses the uplink precoding matrix associated with the SRI to precode the uplink data to be transmitted, and sends the precoded uplink data to the base station through the PUSCH.

[0081] In recent years, with the continuous development of 5G communication systems, data transmission latency has been continuously reduced and transmission capacity has been increasing. 5G communication systems have gradually penetrated into some multimedia services with strong real-time requirements and large data capacity requirements, such as video transmission, CG, XR, and intelligent robots, among which XR includes VR and AR.

[0082] With the rapid increase in communication transmission speeds, real-time video transmission has gradually become one of the core services in current networks. The continuous progress and improvement of extended reality technology has also led to the vigorous development of related industries. Today, VR technology, as a type of XR, has entered various fields closely related to people's production and lives, including education, entertainment, military, healthcare, environmental protection, transportation, and public health. Compared to traditional video services, VR has advantages such as multiple perspectives and strong interactivity, providing users with a completely new visual experience. In addition to smartphones, people increasingly hope to enhance their XR experience through user devices such as head-mounted displays (HMDs) or smart glasses (such as VR glasses and AR glasses).

[0083] Intelligent robots have begun to play a vital role in various fields. Firstly, they have broad application prospects in the industrial sector; they can complete heavy, repetitive, and dangerous tasks on production lines, improving production efficiency and quality, leading to higher levels of automation, reducing labor costs, and enhancing workplace safety. Secondly, intelligent robots also have enormous development potential in the service sector; they can be used in industries such as healthcare, catering, hotels, and retail to provide people with more convenient and efficient services. For example, intelligent robots can act as medical assistants, helping doctors perform surgeries, care for patients, and provide rehabilitation treatment; in the catering industry, intelligent robots can replace human labor in taking orders, delivering food, and cleaning; in the retail industry, intelligent robots can provide customers with product information and shopping suggestions. Furthermore, intelligent robots can be applied to education and entertainment; they can become learning and entertainment partners, providing children with personalized educational content and gaming experiences. The emergence of intelligent robots can also broaden people's horizons, allowing them to better understand the world and technological developments.

[0084] NR's uplink coverage capability cannot meet the high data volume, low latency, and high reliability requirements of multimedia services such as XR and intelligent robots. The main reasons for this limited uplink coverage include: limited transmit power of terminal devices, resulting in lower SNR; secondly, the high PAPR based on OFDM waveforms necessitates power backoff to ensure PA operates in the linear region, further reducing the transmit power of the terminal devices. Figure 6 illustrates the average transmit power before and after power backoff, where P... in P represents the input power of PA. out The power output of the PA is represented by the average transmit power value 2 after the transmit power is backed up, which is less than the average transmit power value 1 before the transmit power is backed up. Power back-up will cause the PAPR to increase. Therefore, power back-up will lead to a decrease in uplink coverage / capacity.

[0085] To address this, this application proposes a signal transmission method that can improve the uplink coverage capability of terminal devices. Figure 7 is a schematic flowchart of a signal transmission method 700 provided in this application. The first communication device in this application can be a terminal device or a module (e.g., circuit, chip, chip system, or processor) within a terminal device, or a logical node, logical module, or software capable of implementing all or part of the terminal device's functions. The second communication device in this application can be a network device or a module (e.g., circuit, chip, chip system, or processor) within a network device, or a logical node, logical module, or software capable of implementing all or part of the network device's functions. The chip can be a modem chip, also known as a baseband chip; or a system-on-a-chip (SoC) chip containing a modem core; or a system-in-package (SIP) chip. The network device in this application can be a base station. Furthermore, the processing performed by a single execution entity can be divided into multiple execution entities, which can be logically and / or physically separated. For example, the processing performed by a network device can be divided into execution by at least one of CU, DU, RU, etc.

[0086] S710, the second communication device sends first information to the first communication device, the first information indicating at least one first subcarrier; correspondingly, the first communication device receives the first information from the second communication device. The multiple subcarriers scheduled for uplink include the at least one first subcarrier; the at least one first subcarrier is a reserved subcarrier, which can be understood as a subcarrier not used for transmitting uplink data.

[0087] Optionally, in step S711, before the second communication device sends the first information to the first communication device, the first communication device sends second information to the second communication device. This second information indicates information about a subcarrier to be reserved. The first information is determined by the second communication device based on the second information; in other words, at least one first subcarrier is determined by the second communication device based on the information about the subcarrier to be reserved. Correspondingly, the second communication device receives the second information from the first communication device.

[0088] The second information indicates the specific implementation methods of the information of the subcarrier to be reserved, including but not limited to the following two.

[0089] In the first implementation, the information regarding the desired reserved subcarriers includes information about at least one set of desired reserved subcarriers. The first information includes information about a first set of desired reserved subcarriers, which includes at least one first subcarrier. The at least one set of desired reserved subcarriers includes the first set of desired reserved subcarriers. Exemplarily, the information about the desired reserved subcarrier set includes an identifier for the desired reserved subcarrier set. A desired reserved subcarrier set can be understood as a desired reserved subcarrier pattern.

[0090] Optionally, after receiving the second information from the first communication device, the second communication device determines a first expected reserved subcarrier set from the at least one expected reserved subcarrier set according to the information of at least one expected reserved subcarrier set indicated by the second information; and sends a first information to the first communication device, the first information including the information of the first expected reserved subcarrier set, the first expected reserved subcarrier set including at least one first subcarrier, in other words, the subcarriers included in the first expected reserved subcarrier set are the at least one first subcarrier mentioned above.

[0091] For example, the second information includes information about a set of subcarriers to be reserved. After receiving the second information from the first communication device, the second communication device determines the first set of subcarriers to be reserved as the set of subcarriers to be reserved.

[0092] For example, the second information includes information on a plurality of desired reserved subcarrier sets. After receiving the second information from the first communication device, the second communication device determines the first desired reserved subcarrier set from the plurality of desired reserved subcarrier sets.

[0093] In the second implementation, the information regarding the subcarriers to be reserved includes the number of subcarriers to be reserved, or the ratio of the total bandwidth of the subcarriers to the total bandwidth of the multiple subcarriers. Based on the information regarding the subcarriers to be reserved (the second information), the second communication device can determine the number of subcarriers to be reserved by the first communication device; the number of at least one first subcarrier indicated by the second communication device using the first information is equal to the number of subcarriers to be reserved by the first communication device. It should be noted that the number of at least one first subcarrier indicated by the second communication device using the first information may not be equal to the number of subcarriers to be reserved by the first communication device.

[0094] Optionally, the first information includes information about the first subcarrier or the last subcarrier among at least one first subcarrier, and the at least one first subcarrier is consecutive. Based on this optional implementation, at least one first subcarrier is predefined to be consecutive. The first communication device can determine at least one first subcarrier based on the information about the first subcarrier or the last subcarrier among at least one first subcarrier included in the first information, and the number of subcarriers to be reserved, wherein the number of at least one first subcarrier is equal to the number of subcarriers to be reserved.

[0095] For example, the information of the first subcarrier is the identifier of the first subcarrier, and the information of the last subcarrier is the identifier of the last subcarrier. For example, the information of the first subcarrier is the starting frequency of the first subcarrier, and the information of the last subcarrier is the starting frequency of the last subcarrier.

[0096] For example, the starting frequency can be a relative frequency position, such as the starting frequency of the 10th subcarrier within a bandwidth part (BWP) being the starting frequency of the first subcarrier; the starting frequency can also be an absolute frequency position, such as 2.8 GHz, 2.85 GHz, etc.

[0097] Optionally, the first information includes information corresponding to at least one first subcarrier. For example, the first information includes an identifier or starting frequency corresponding to at least one first subcarrier. For example, the at least one first subcarrier may be continuous or discontinuous. Based on this optional implementation, the first communication device can directly obtain the information corresponding to at least one first subcarrier according to the first information, thereby determining at least one first subcarrier.

[0098] Optionally, the first information includes information about at least one reserved set of subcarriers, which includes at least one first subcarrier. Exemplarily, the subcarriers in a reserved set of subcarriers are consecutive. Exemplarily, the first information includes an identifier of at least one reserved set of subcarriers. Based on this optional implementation, the first communication device can determine at least one reserved set of subcarriers according to the first information, thereby determining at least one first subcarrier.

[0099] Optionally, the protocol predefines the number of reserved subcarriers, or the protocol predefines the ratio of the total bandwidth of the reserved subcarriers to the total bandwidth of the multiple uplink scheduled subcarriers. In an optional implementation, the first communication device does not need to send second information to the second communication device; the first and second communication devices can determine the number of reserved subcarriers based on this ratio. The number of reserved subcarriers predefines by the protocol can be one or more fixed values; for example, carriers at different frequencies correspond to different numbers of reserved subcarriers. The ratio of the total bandwidth of the predefined reserved subcarriers to the total bandwidth of the multiple subcarriers can also be one or more fixed values; for example, carriers at different frequencies correspond to different ratios of the total bandwidth of the reserved subcarriers to the total bandwidth of the multiple uplink scheduled subcarriers.

[0100] Optionally, when the protocol predefines the number of reserved subcarriers or the ratio of the total bandwidth of the predefine reserved subcarriers to the total bandwidth of the multiple uplink scheduled subcarriers, the first information sent by the second communication device to the first communication device includes information about the first subcarrier or the last subcarrier among at least one first subcarrier, and at least one first subcarrier is consecutive; or, the first information sent by the second communication device to the second communication device includes information corresponding to at least one first subcarrier respectively; or, the first information sent by the second communication device to the second communication device includes information about at least one set of reserved subcarriers.

[0101] Optionally, the protocol predefines the number of reserved subcarriers or the ratio of the total bandwidth of the reserved subcarriers to the total bandwidth of the multiple uplink scheduled subcarriers, and the protocol predefines the information of the first subcarrier or the information of the last subcarrier in at least one first subcarrier. In an optional implementation, the first communication device does not need to send second information to the second communication device, and the second communication device does not need to send first information to the first communication device.

[0102] Optionally, before the first communication device sends the second information to the second communication device, the second communication device sends a DCI to the first communication device. This DCI indicates information such as PMI / SRI, modulation and coding scheme (MCS), and time-frequency resources. The frequency domain resources corresponding to these time-frequency resources are multiple uplink-scheduled subcarriers. Correspondingly, the first communication device receives the DCI from the second communication device.

[0103] S720, the first communication device transmits a first signal on at least one first subcarrier and a second signal on at least one second subcarrier. The second signal is a signal carrying uplink data. The first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple uplink-scheduled subcarriers. The transmission power of the first signal is determined by the first communication device based on the transmission power of the second signal and a power threshold. The time unit for transmitting the first signal is the same as the time unit for transmitting the second signal. The multiple uplink-scheduled subcarriers include at least one first subcarrier and at least one second subcarrier. Correspondingly, the second communication device receives the first signal from the first communication device on at least one first subcarrier and receives the second signal from the first communication device on at least one second subcarrier. The time unit for receiving the first signal is the same as the time unit for receiving the second signal.

[0104] In the technical solution provided in the embodiments of this application, a first signal is transmitted on at least one first subcarrier (a reserved subcarrier), and a second signal carrying uplink data is transmitted on at least one second subcarrier (an uplink-scheduled subcarrier other than the reserved subcarrier). The first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple uplink-scheduled subcarriers, which can avoid the signals transmitted on the multiple uplink-scheduled subcarriers having a high PAPR, thereby eliminating the need to reduce the transmission power of the signal carrying uplink data and improving the uplink coverage capability of the first communication device.

[0105] Optionally, the peak-to-average power ratio (PAPR) of the signals transmitted on the multiple subcarriers of the uplink scheduling is less than or equal to a preset threshold. This preset threshold can be predefined, indicated by the second communication device to the first communication device, or determined by the first communication device itself; this application does not specifically limit this. Based on this implementation, a lower PAPR of the time-domain waveform transmitted on the multiple subcarriers of the uplink scheduling can be achieved without reducing the transmit power of the signal carrying uplink data, thereby improving the uplink coverage capability of the first communication device.

[0106] Optionally, in step S721, before the first communication device transmits the first signal and the second signal, the first communication device determines the transmission power of the first signal based on the transmission power of the second signal and a power threshold value.

[0107] For example, firstly, the first communication device determines the time-domain waveform d(n) corresponding to the first signal according to the following formula (1):

[0108] Where, x thThe power threshold value of the PA of the first communication device in the linear region is known to the first communication device; x(n) represents the sequence corresponding to the second signal; |x(n)| represents the transmit power of the sequence corresponding to the second signal; n represents the nth element in the sequence;

[0109] Then, determine the frequency domain waveform C of the first signal according to the following formula (2): IFFT[C]=d(n) (2)

[0110] Wherein, IFFT[C] represents the inverse fast Fourier transformation (iFFT) of the frequency domain waveform C;

[0111] Finally, the transmission power of the first signal is determined based on the frequency domain waveform C of the first signal.

[0112] Optionally, the second communication device sends third information to the first communication device, the third information indicating power information corresponding to at least one first subcarrier; correspondingly, the first communication device receives the third information from the first communication device. Exemplarily, the power information includes the maximum power value of the signal transmitted on at least one subcarrier. Exemplarily, the power information includes the percentage of the maximum power value of the signal transmitted on at least one subcarrier to the maximum power value of the signal transmitted on at least two subcarriers. Correspondingly, the first communication device receives the third information from the second communication device and further limits the transmission power of the first signal transmitted on at least one subcarrier based on the third information.

[0113] Optionally, before the first communication device transmits the first signal and the second signal, the first communication device precodes the first signal and the second signal to be transmitted according to the PMI / SRI indicated by the DCI, and the first signal and the second signal transmitted by the first communication device to the second communication device are the precoded first signal and the second signal.

[0114] Optionally, the first communication device determines whether to use at least one first subcarrier (a reserved subcarrier) to adjust the PARP of the signal transmitted on the multiple uplink scheduled subcarriers based on power control information, and informs the second communication device through uplink control information (UCI). For example, if the PARP of the signal carrying uplink data to be transmitted on the multiple uplink scheduled subcarriers is low, it is not necessary to use at least one first subcarrier (a reserved subcarrier) to adjust the transmit power, and thus the at least one first subcarrier (a reserved subcarrier) can be used for uplink data transmission, making full use of the uplink scheduled resources. Optionally, the UCI and uplink data can be simultaneously multiplexed on the PUSCH for transmission, or the UCI can be sent to the second communication device before the transmission timing corresponding to the uplink data.

[0115] The above describes the signal transmission method provided by the embodiments of this application. The following will describe the execution subject used to perform the above signal transmission method.

[0116] Figure 8 is a schematic block diagram of a communication device 800 provided in an embodiment of this application. The communication device 800 can be the first communication device in the method embodiment of Figure 7. The communication device 800 includes:

[0117] Transceiver module 810 is used to receive first information, the first information indicating at least one first subcarrier;

[0118] The transceiver module 810 is further configured to transmit a first signal on the at least one first subcarrier and a second signal on the at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple subcarriers scheduled for uplink, the transmit power of the first signal is determined based on the transmit power of the second signal and a power threshold value, the time unit for transmitting the first signal is the same as the time unit for transmitting the second signal, and the multiple subcarriers include the at least one first subcarrier and the at least one second subcarrier.

[0119] Optionally, the communication device 800 further includes a processing module 820 for determining the transmission power of the first signal based on the transmission power of the second signal and a power threshold value.

[0120] Optionally, the adjusted peak-to-average power ratio is less than or equal to a preset threshold.

[0121] Optionally, the transceiver module 810 is further configured to send second information, the second information indicating information about the subcarriers to be reserved, the first information being determined based on the second information.

[0122] Optionally, the information on the desired reserved subcarriers includes information on at least one set of desired reserved subcarriers, the first information including information on a first set of desired reserved subcarriers, the first set of desired reserved subcarriers including the at least one first subcarrier, and the at least one set of desired reserved subcarriers including the first set of desired reserved subcarriers.

[0123] Optionally, the information on the desired reserved subcarriers includes the number of desired reserved subcarriers, or the ratio of the total bandwidth of the desired reserved subcarriers to the total bandwidth of the plurality of subcarriers.

[0124] Optionally, the first information includes information about the first subcarrier or the last subcarrier among the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, the first information includes information corresponding to each of the at least one first subcarrier; or, the first information includes information about at least one reserved set of subcarriers, wherein the at least one reserved set of subcarriers includes the at least one first subcarrier.

[0125] Figure 9 is a schematic block diagram of another communication device 900 provided in an embodiment of this application. This communication device 900 can be the second communication device in the method embodiment of Figure 7. The communication device 900 includes:

[0126] Transceiver module 910 is used to transmit first information, the first information indicating at least one first subcarrier;

[0127] The transceiver module 910 is further configured to receive a first signal on the at least one first subcarrier and a second signal on the at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple subcarriers scheduled for uplink, the transmit power of the first signal is determined based on the transmit power of the second signal and a power threshold value, the time unit for receiving the first signal is the same as the time unit for receiving the second signal, and the multiple subcarriers include the at least one first subcarrier and the at least one second subcarrier.

[0128] Optionally, the adjusted peak-to-average power ratio is less than or equal to a preset threshold.

[0129] Optionally, the transceiver module 910 is further configured to receive second information, the second information indicating information about a subcarrier to be reserved, the first information being determined based on the second information.

[0130] Optionally, the information on the desired reserved subcarriers includes information on at least one set of desired reserved subcarriers, the first information including information on a first set of desired reserved subcarriers, the first set of desired reserved subcarriers including the at least one first subcarrier, and the at least one set of desired reserved subcarriers including the first set of desired reserved subcarriers.

[0131] Optionally, the information on the desired reserved subcarriers includes the number of desired reserved subcarriers, or the ratio of the total bandwidth of the desired reserved subcarriers to the total bandwidth of the plurality of subcarriers.

[0132] Optionally, the first information includes information about the first subcarrier or the last subcarrier among the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, the first information includes information corresponding to each of the at least one first subcarrier; or, the first information includes information about at least one reserved set of subcarriers, wherein the at least one reserved set of subcarriers includes the at least one first subcarrier.

[0133] Figure 10 is a schematic block diagram of another communication device 1000 provided in an embodiment of this application. The communication device 1000 can be either the first communication device or the second communication device described above. The communication device 1000 includes a processor 1010, which implements the signal transmission method provided in the embodiment of this application through logic circuits or by executing code instructions.

[0134] Optionally, the communication device 1000 may further include interface circuitry 1020. Processor 1010 and interface circuitry 1020 are coupled to each other. It is understood that interface circuitry 1020 may be a transceiver or an input / output interface.

[0135] Optionally, the communication device 1000 may also include a memory 1030 for storing instructions executed by the processor 1010, or storing input data required by the processor 1010 to execute instructions, or storing data generated after the processor 1010 executes instructions.

[0136] The aforementioned processor 1010 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by software instructions. The aforementioned processor may be 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 devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory; the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0137] This application also provides a communication system, including a first communication device in the signal transmission method provided in this application, and other communication devices communicating with the first communication device, a second communication device, and other communication devices communicating with the second communication device.

[0138] This application also provides a computer-readable storage medium storing a computer program for implementing the methods in the above-described method embodiments. When the computer program is run on a computer, the computer can implement the methods in the above-described method embodiments.

[0139] This application also provides a computer program product, which includes a computer program that, when run on a computer, causes the methods in the above method embodiments to be executed.

[0140] This application also provides a chip, including a processor connected to a memory for storing computer programs, and the processor for executing the computer programs stored in the memory, so that the chip performs the methods described in the above method embodiments.

[0141] It should be understood that, in the embodiments of this application, for a technical feature, the technical features in that technical feature are distinguished by "first", "second" and "third", and there is no order of precedence or size among the technical features described by "first", "second" and "third".

[0142] Furthermore, the term "and / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. The term "at least one" in this application can represent "one" and "two or more." For example, A, B, and C can represent: A existing alone, B existing alone, C existing alone, A and B existing simultaneously, A and C existing simultaneously, C and B existing simultaneously, and A, B, and C existing simultaneously.

[0143] In this embodiment of the application, expressions such as "A includes B" are used to indicate that A may or may not include other items besides B. When other items are not included, it can be understood as "A is B", in which case "A" can be replaced with "B".

[0144] In the embodiments of this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which may include direct transmission via the air interface or indirect transmission via the air interface by other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which may include direct reception from YY via the air interface or indirect reception from YY via the air interface by other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface.

[0145] In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, wiring, or interfaces.

[0146] It is understandable that information may undergo necessary processing, such as encoding and modulation, between the source and destination, but the destination can understand the valid information from the source. Similar statements in this application can be interpreted in a similar way and will not be elaborated further.

[0147] In the embodiments of this application, "instruction" can include direct and indirect instructions, as well as explicit and implicit instructions. The information indicated by a certain piece of information (hereinafter referred to as instruction information) is called the information to be instructed. In specific implementation, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also indirectly indicate the information to be instructed by indicating other information, where there is an association between the other information and the information to be instructed; or it can indicate only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction can be implemented by using a pre-agreed (e.g., protocol predefined) arrangement of various information, thereby reducing the instruction overhead to a certain extent. This application does not limit the specific method of instruction. It is understood that for the sender of the instruction information, the instruction information can be used to indicate the information to be instructed; for the receiver of the instruction information, the instruction information can be used to determine the information to be instructed.

[0148] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined according to their inherent logical relationships to form new embodiments, implementation methods, methods, or implementation approaches. The embodiments described below do not constitute a limitation on the scope of protection of this application.

[0149] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0150] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0151] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0152] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0153] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0154] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0155] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of signal transmission, characterized by, The method includes: Receive first information, the first information indicating at least one first subcarrier; A first signal is transmitted on at least one first subcarrier, and a second signal is transmitted on at least one second subcarrier. The second signal is a signal carrying uplink data. The first signal is used to adjust the peak-to-average power ratio of the signals transmitted on the multiple subcarriers scheduled for uplink. The transmit power of the first signal is determined based on the transmit power of the second signal and a power threshold. The time unit for transmitting the first signal is the same as the time unit for transmitting the second signal. The multiple subcarriers include the at least one first subcarrier and the at least one second subcarrier.

2. The method according to claim 1, characterized in that, The adjusted peak-to-average power ratio is less than or equal to a preset threshold.

3. The method according to claim 1 or 2, characterized in that, Also includes: Send a second message indicating information about the subcarriers to be reserved, the first message being determined based on the second message.

4. The method according to claim 3, characterized in that, The information on the expected reserved subcarriers includes information on at least one set of expected reserved subcarriers. The first information includes information on a first set of expected reserved subcarriers, which includes the at least one first subcarrier. The at least one set of expected reserved subcarriers includes the first set of expected reserved subcarriers.

5. The method according to claim 3, characterized in that, The information regarding the expected reserved subcarriers includes the number of expected reserved subcarriers, or the ratio of the total bandwidth of the expected reserved subcarriers to the total bandwidth of the plurality of subcarriers.

6. The method according to claim 5, characterized in that, The first information includes information about the first subcarrier or the last subcarrier in the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, The first information includes information corresponding to each of the at least one first subcarrier; or, The first information includes information on at least one set of reserved subcarriers, wherein the at least one set of reserved subcarriers includes the at least one first subcarrier.

7. A method of signal transmission, characterized by The method includes: Send a first message, the first message indicating at least one first subcarrier; A first signal is received on at least one first subcarrier, and a second signal is received on at least one second subcarrier, wherein the second signal is a signal carrying uplink data, the first signal is used to adjust the peak-to-average power ratio of signals transmitted on multiple uplink scheduled subcarriers, the transmit power of the first signal is determined based on the transmit power of the second signal and a power threshold value, the time unit for receiving the first signal is the same as the time unit for receiving the second signal, and the multiple subcarriers include the at least one first subcarrier and the at least one second subcarrier.

8. The method according to claim 7, characterized in that, The adjusted peak-to-average power ratio is less than or equal to a preset threshold.

9. The method according to claim 7 or 8, characterized in that, Also includes: Receive second information, which indicates information about the subcarriers to be reserved, and the first information is determined based on the second information.

10. The method according to claim 9, characterized in that, The information on the expected reserved subcarriers includes information on at least one set of expected reserved subcarriers. The first information includes information on a first set of expected reserved subcarriers, which includes the at least one first subcarrier. The at least one set of expected reserved subcarriers includes the first set of expected reserved subcarriers.

11. The method according to claim 9, characterized in that, The information regarding the expected reserved subcarriers includes the number of expected reserved subcarriers, or the ratio of the total bandwidth of the expected reserved subcarriers to the total bandwidth of the plurality of subcarriers.

12. The method according to claim 11, characterized in that, The first information includes information about the first subcarrier or the last subcarrier in the at least one first subcarrier, wherein the at least one first subcarrier is consecutive; or, The first information includes information corresponding to each of the at least one first subcarrier; or, The first information includes information on at least one set of reserved subcarriers, wherein the at least one set of reserved subcarriers includes the at least one first subcarrier.

13. A communication device, characterized in that, It includes a module for performing the method as described in any one of claims 1 to 6, or a module for performing the method as described in any one of claims 7 to 12.

14. A communication device, characterized in that, Includes a processor, the processor being configured to implement the method as described in any one of claims 1 to 6, or to implement the method as described in any one of claims 7 to 12.

15. A communication system, characterized in that, include: A first communication device and a second communication device, wherein the first communication device is used to implement the method of any one of claims 1 to 6, and the second communication device is used to implement the method of any one of claims 7 to 12.

16. A computer-readable storage medium, characterized in that, include: The computer-readable medium stores a computer program; When the computer program is run by the processor, the method of any one of claims 1 to 12 is performed.

17. A computer program product, characterized in that, Includes a computer program, which, when executed, causes the method as described in any one of claims 1 to 12 to be performed.

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