Signal transmission method and, apparatus, and system

Abstract

The present application provides a data transmission method and apparatus, and a system, which can be applied to the technical field of communication. The data transmission method provided by the present application comprises: acquiring first indication information, the first indication information being used to indicate a frequency domain resource occupied by at least one first uplink signal; in a first BWP, sending at least one first uplink signal; in a second BWP, sending at least one second uplink signal. A time domain symbol starting time for sending the at least one first uplink signal is no later than the time domain symbol starting time for sending the at least one second uplink signal, and the frequency domain resource of the first BWP is different from the frequency domain resource of the second BWP.

Description

Signal transmission method, device and system

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on December 29, 2023, with application number 202311870770.7 and application name “Signal Transmission Method, Device and System”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technologies, and in particular to signal transmission methods, devices, and systems. Background Art

[0003] 5G New Radio (NR) devices generally have high demands for uplink data transmission rates. Due to the limited bandwidth of terminal devices, NR network equipment generally needs to allocate different bandwidths for uplink data transmission, namely uplink bandwidth parts (BWPs), to different terminal devices. Before uplink data transmission, the uplink channel quality indicator (CQI) is calculated based on channel measurement results to determine the modulation and coding scheme (MCS) level for uplink data transmission. The uplink CQI measurement result is related to the signal-to-interference-plus-noise ratio (SINR) of the signal and is limited by the strength of the interference signal. Due to the different scheduling situations in the frequency domain of different cells, the interference strength in different resource blocks (RBs) in the frequency domain varies. If the RBs within the BWP currently used by the terminal device are subject to strong signal interference from other terminal devices, the uplink BWP currently used by the terminal device needs to be switched to another new BWP to reduce the impact of the interference signal on the uplink data transmission rate.

[0004] When the terminal device switches the uplink BWP, the frequency domain position of the interference measurement reference signal sent by the terminal device does not match the frequency domain position of the physical uplink shared channel (PUSCH) scheduled on the BWP after the switch, resulting in a mismatch between the currently measured interference intensity and the interference intensity during future PUSCH scheduling. Summary of the Invention

[0005] The embodiments of the present application provide a signal transmission method, apparatus, and system for solving the problem of mismatch in the frequency domain position of a PUSCH scheduled on a BWP after a terminal device is switched.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, a signal transmission method is provided. The method can be executed by a terminal device, or by a component of the terminal device (such as a processor, chip, or chip system), or by a logic module or software that can implement all or part of the terminal device's functions. The following description uses a terminal device as an example of the execution subject of the method. The method includes: obtaining first indication information, where the first indication information is used to indicate the frequency domain resources occupied by at least one first uplink signal; sending at least one first uplink signal within a first BWP; and sending at least one second uplink signal within a second BWP; wherein the start time of the time domain symbol for sending the at least one first uplink signal is no later than the start time of the time domain symbol for sending the at least one second uplink signal, and the frequency domain resources of the first BWP and the frequency domain resources of the second BWP are different.

[0008] Through the above method, the first uplink signal is sent on a BWP different from the BWP before switching. The network device can more accurately estimate the uplink channel quality by measuring the first uplink signal, thereby determining more accurate uplink scheduling information (for example, MCS level) and improving the uplink throughput.

[0009] In a possible implementation, the transmit power of the first uplink signal is determined according to the number of subcarriers and / or the subcarrier spacing included in the first BWP and the second BWP.

[0010] In a possible implementation, the method further includes: receiving configuration information, where the configuration information includes the number of subcarriers and / or subcarrier spacing of the first BWP.

[0011] In a possible implementation manner, the method further includes: receiving second indication information, where the second indication information indicates frequency domain resources occupied by the first BWP.

[0012] In a possible implementation manner, the method further includes: receiving third indication information, where the third indication information indicates scheduling information of a third uplink signal.

[0013] In a possible implementation manner, the method further includes: sending a third uplink signal within the first BWP according to the scheduling information.

[0014] In a possible implementation, a start time of a time domain symbol for sending the third uplink signal is not earlier than a start time of a time domain symbol for sending the second uplink signal.

[0015] In a possible implementation, the transmit power of the first uplink signal is P1, the transmit power of the second uplink signal is P2, and the difference between the transmit power of the first uplink signal and the transmit power of the second uplink signal is ΔP, where ΔP=P1-P2.

[0016] In a possible implementation, a difference ΔP between the transmit power of the first uplink signal and the transmit power of the second uplink signal satisfies the formula:

[0017] The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2.

[0018] In a possible implementation, the first uplink signal and / or the second uplink signal is used to calculate an uplink channel quality indicator CQI, and the scheduling information is determined according to the CQI or the first uplink signal.

[0019] In a second aspect, a signal transmission method is provided. The method can be executed by a network device, or by a component of a terminal device (e.g., a processor, chip, or chip system), or by a logic module or software that implements all or part of the terminal device's functions. The method is described below using a terminal device as an example. The method includes: sending first indication information, the first indication information being used to indicate the frequency domain resources occupied by at least one first uplink signal; receiving at least one first uplink signal within a first BWP; and receiving at least one second uplink signal within a second BWP; wherein the frequency domain resources of the first BWP and the frequency domain resources of the second BWP are different.

[0020] Through the above method, the first uplink signal is sent on a BWP different from the BWP before switching. The network device can more accurately estimate the uplink channel quality by measuring the first uplink signal, thereby determining more accurate uplink scheduling information (for example, MCS level) and improving the uplink throughput.

[0021] In a possible implementation, the transmit power of the first uplink signal is determined according to the number of subcarriers and / or the subcarrier spacing included in the first BWP and the second BWP.

[0022] In a possible implementation, the method further includes: sending configuration information, where the configuration information includes the number of subcarriers and / or the subcarrier spacing of the first BWP.

[0023] In a possible implementation manner, the method further includes: sending second indication information, where the second indication information indicates the frequency domain resources occupied by the first BWP.

[0024] In a possible implementation manner, the method further includes: sending third indication information, where the third indication information indicates scheduling information of a third uplink signal.

[0025] In a possible implementation manner, the method further includes: receiving a third uplink signal within the first BWP.

[0026] In a possible implementation, the transmit power of the first uplink signal is P1, the transmit power of the second uplink signal is P2, and the difference between the transmit power of the first uplink signal and the transmit power of the second uplink signal is ΔP, where ΔP=P1-P2.

[0027] In a possible implementation, a difference ΔP between the transmit power of the first uplink signal and the transmit power of the second uplink signal satisfies the formula:

[0028] The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2.

[0029] In a possible implementation manner, the first uplink signal and / or the second uplink signal is used to calculate an uplink channel quality indicator CQI, and the scheduling information is determined according to the CQI or the first uplink signal.

[0030] In a third aspect, a communication device is provided, comprising: a processor coupled to a memory, the memory being used to store computer execution instructions, and the processor being used to execute the instructions stored in the memory; when the instructions are executed by the processor, the communication device executes the method of the first aspect.

[0031] In a fourth aspect, a communication device is provided, comprising: a processor coupled to a memory, the memory being used to store computer execution instructions, and the processor being used to execute the instructions stored in the memory; when the instructions are executed by the processor, the communication device executes the method of the second aspect.

[0032] In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a computer, the method in the first aspect or the second aspect is executed.

[0033] In a sixth aspect, a communication system is provided, which includes a terminal device and a network device; the terminal device is used to execute the method in the first aspect; and the network device is used to execute the method in the second aspect.

[0034] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of a technical feature, technical solution or beneficial effect in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic diagram of a network system architecture provided by an embodiment of the present application;

[0036] FIG2 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0037] FIG3a is an interactive diagram of a data transmission method provided in an embodiment of the present application;

[0038] FIG3 b is an interactive diagram of another data transmission method provided in an embodiment of the present application;

[0039] FIG3c is an interactive diagram of yet another data transmission method provided in an embodiment of the present application;

[0040] FIG3 d is an interactive schematic diagram of yet another data transmission method provided in an embodiment of the present application;

[0041] FIG3e is an interactive diagram of yet another data transmission method provided in an embodiment of the present application;

[0042] FIG4 is an interactive diagram of a data transmission method provided in an embodiment of the present application;

[0043] FIG5a is a time-frequency resource configuration diagram provided in an embodiment of the present application;

[0044] FIG5b is another time-frequency resource configuration diagram provided in an embodiment of the present application;

[0045] FIG6 is an interactive diagram of another data transmission method provided in an embodiment of the present application;

[0046] FIG7a is a schematic diagram of another data transmission method provided in an embodiment of the present application;

[0047] FIG7 b is a schematic diagram of another data transmission method provided in an embodiment of the present application;

[0048] FIG8a is a time-frequency resource distribution diagram provided in an embodiment of the present application;

[0049] FIG8b is another time-frequency resource distribution diagram provided in an embodiment of the present application;

[0050] FIG8c is another time-frequency resource distribution diagram provided in an embodiment of the present application;

[0051] FIG8 d is another time-frequency resource distribution diagram provided in an embodiment of the present application;

[0052] FIG8e is another time-frequency resource distribution diagram provided in an embodiment of the present application;

[0053] FIG8f is another time-frequency resource distribution diagram provided in an embodiment of the present application;

[0054] FIG8g is another time-frequency resource distribution diagram provided in an embodiment of the present application;

[0055] FIG9 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0056] FIG10 is a schematic diagram of a simplified structure of a terminal provided in an embodiment of the present application;

[0057] FIG11 is a schematic diagram of the structure of a simplified network device provided in an embodiment of the present application;

[0058] FIG12 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Among them, in the description of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship. For example, A / B can represent A or B; "and / or" in the present application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit differences. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0060] The resource allocation method provided in the embodiment of the present application can be applicable to various communication systems. For example, the resource allocation method provided in the embodiment of the present application can be applied to a third generation partnership project (3GPP) communication system, for example, a long term evolution (LTE) system, a fifth generation (5G) system, a vehicle to everything (V2X) system, a system of LTE and NR hybrid networking, or a device to device (D2D) system, a machine to machine (M2M) communication system, an Internet of Things (IoT), or the communication system can also be a non-3GPP communication system, or other similar new communication systems for the future, such as a sixth generation (6G) system, which is not specifically limited in the embodiment of the present application. In addition, the term "system" can be interchangeable with "network".

[0061] The terminal device in the embodiment of the present application can be referred to as a UE, and the network device can be referred to as a base station or gNB.

[0062] It should be noted that the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0063] Optionally, the network device in the embodiment of the present application is a device that connects a terminal device to a wireless network. The network devices in the embodiments of the present application may include various forms of base stations, for example, a macro base station, a micro base station (also known as a small station), a relay station, an access point, a transmitting point (TP), an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a device that implements base station functions in a communication system evolved after 5G, a mobile switching center, and a device that performs base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications; it may also be a network device in an NTN communication system, that is, it may be deployed on a high-altitude platform or a satellite; it may also be a module or unit that performs part of the functions of a base station, for example, it may be a centralized unit (CU) in a cloud radio access network (C-RAN) system, it may also be a distributed unit (DU), or it may be a radio unit ( Unit, RU), for example, it can be CU, DU or RU under the O-RAN architecture. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. All or part of the functions of the network device can also be implemented by software functions running on hardware, or by virtualization functions or service functions instantiated on a platform (such as a cloud platform).

[0064] In another possible scenario, multiple network devices collaborate to assist the terminal in achieving wireless access, and different network devices respectively implement part of the functions of the access network. For example, the network device in this application can be composed of multiple network devices and is not limited to a single network device. The functions implemented by the network device in this application can also be implemented by multiple network devices, or through parts of multiple network devices. For example, the network device can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0065] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0066] Optionally, the terminal device in the embodiments of the present application may be a device with wireless transceiver functions, which may also be referred to as a terminal. The terminal device may specifically refer to user equipment, access terminal, subscriber unit, user station, mobile station, customer-premises equipment (CPE), remote station, remote terminal, mobile device, mobile terminal, user terminal, wireless communication device, user agent, or user device. The terminal device may also be a satellite phone, a cellular phone, a smart phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless data card, a wireless modem, a tablet computer, a computer with wireless transceiver function, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a communication device carried on a high-altitude aircraft, a wearable device, a drone, a robot, a smart point of sale (POS) machine, a machine type communication device, a terminal device in D2D, a terminal device in V2X, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or a wireless terminal in a smart city. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device. All or part of the functions of the terminal device can also be implemented by software functions running on hardware, or by virtualization functions or service functions instantiated on a platform (such as a cloud platform).

[0067] Figure 1 shows the 5G network architecture diagram. The following is a detailed description of the 5G network structure based on Figure 1.

[0068] The 5G system architecture is divided into two parts: the access network and the core network. The access network is used to implement functions related to wireless access. The core network mainly includes the following key logical network elements: Radio Access Network 102 (RAN), Access and Mobility Management Function 105 (AMF), Session Management Function 106 (SMF), User Plane Function 103 (UPF), Policy Control Function 107 (Policy Control Function), and Unified Data Management 108 (UDM) network elements.

[0069] UE 101 refers to a network terminal device, such as a mobile phone, an Internet of Things terminal device, etc.

[0070] RAN 102 provides wireless access devices for terminal devices, including but not limited to eNodeB, WiFi AP, WiMAX BS, etc.

[0071] AMF 105 is mainly responsible for mobility management in the mobile network, such as user location update, user registration network, user switching, etc.

[0072] The SMF 106 is primarily responsible for session management in the mobile network, such as session establishment, modification, and release. Specific functions include allocating IP addresses to users and selecting the UPF 103 that provides packet forwarding capabilities.

[0073] PCF 107 is responsible for providing policies to AMF and SMF, such as QoS policy, slice selection policy, etc.

[0074] The UDM 108 is used to store user data, such as contract information and authentication / authorization information.

[0075] AF (Application Function) is responsible for providing services to the 3GPP network, such as influencing service routing and interacting with the PCF for policy control.

[0076] UPF 103 is mainly responsible for processing user messages, such as forwarding and billing.

[0077] DN 104 refers to a carrier network that provides data transmission services to users, such as IMS (IP Multi-media Service) and the Internet.

[0078] The UE accesses the data network (DN) by establishing a PDU session (PDU session) between the UE, the RAN, the UPF, and the DN.

[0079] In current public discussions on network architecture evolution, it has been proposed that the next step in the evolution of wireless network architecture is to introduce an SBA network architecture, also known as RAN service-based architecture, or the introduction of service-based interfaces for network devices. The RAN service-based architecture has the following advantages:

[0080] Service-based RAN architecture enables end-to-end unified orchestration, such as unified service discovery and service invocation. This reduces functional coupling between network elements and accelerates feature rollout. From a performance perspective, the RAN service-based architecture can reduce signaling hops and enable rapid connection establishment. One current technical approach within the RAN service-based architecture involves the RAN storing user context and not releasing it until the UE registers. This architecture simplifies downlink signaling addressing (core network elements interact directly with network equipment), avoiding the circuitous paths caused by downlink signaling and the asymmetric uplink and downlink processes. In this network architecture, since base stations can directly connect to all CN network elements, UE mobility and context management no longer rely on centralized AMF management. The RAN manages UE context, eliminating the need for message relay through the AMF. This technology allows direct interaction between the RAN and 5GC NFs without the AMF. Currently, in NR technology, the RAN manages UE context and also handles some mobility management, such as inactive terminal management. With this technology, UE context management and migration between RANs is transparent to the 5GC.

[0081] Optionally, the network devices, terminal devices, or core network devices in the embodiments of the present application can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the surface of water; and can also be deployed in the air on aircraft, balloons, and artificial satellites. The embodiments of the present application do not limit the application scenarios of the network devices, terminal devices, or core network devices.

[0082] Optionally, the network device and the terminal device in the embodiments of the present application can communicate through an authorized spectrum, or can communicate through an unlicensed spectrum, or can communicate through both an authorized spectrum and an unlicensed spectrum. The network device and the terminal device can communicate through a spectrum below 6 gigahertz (GHz), or can communicate through a spectrum above 6 GHz, or can communicate using a spectrum below 6 GHz and a spectrum above 6 GHz at the same time. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

[0083] Optionally, the network device, terminal device or core network device in the embodiment of the present application can also be referred to as a communication device, which can be a general device or a dedicated device, and the embodiment of the present application does not make specific limitations on this.

[0084] Optionally, during specific implementation, a terminal device, a network device, or a core network device may adopt the structure shown in Figure 2, or include the components shown in Figure 2. Figure 2 is a schematic diagram of the structure of a communication device 200 provided in this application. The communication device 200 may be a terminal device or a chip or system-on-chip in a terminal device; or, it may be a network device or a module or chip or system-on-chip in a network device; or, it may be a core network device or a module or chip or system-on-chip in a core network device.

[0085] As shown in FIG2 , the communication device 200 includes at least one processor 201 and at least one communication interface ( FIG2 is merely an example of a communication interface 204 and a processor 201). Optionally, the communication device 200 may further include a communication bus 202 and a memory 203.

[0086] The processor 201 may be a general-purpose central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 201 may also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0087] Communication bus 202 is used to connect the various components in communication device 200, enabling communication between them. Communication bus 202 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, for example. This bus can be categorized as an address bus, a data bus, a control bus, and so on. For ease of illustration, FIG2 shows a single thick line, but this does not necessarily indicate that there is only one bus or only one type of bus.

[0088] Communication interface 204 is used to communicate with other devices or communication networks. Exemplarily, communication interface 204 can be a module, circuit, transceiver, or any other device capable of communication. Optionally, communication interface 204 can also be an input / output interface within processor 201, used to implement signal input and output to the processor.

[0089] The memory 203 may be a device with a storage function, used to store instructions and / or data, wherein the instructions may be computer programs.

[0090] Exemplarily, the memory 203 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0091] It should be noted that the memory 203 can exist independently of the processor 201 or can be integrated with the processor 201. The memory 203 can be located within the communication device 200 or outside the communication device 200, without limitation. The processor 201 can be used to execute instructions stored in the memory 203 to implement the methods provided in the following embodiments of the present application.

[0092] As an optional implementation, the communication device 200 may further include an output device 205 and an input device 206. The output device 205 communicates with the processor 201 and can display information in a variety of ways. For example, the output device 205 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 206 communicates with the processor 201 and can receive user input in a variety of ways. For example, the input device 206 can be a mouse, a keyboard, a touch screen device, or a sensor device.

[0093] It should be noted that the structure shown in FIG2 does not constitute a specific limitation on the network device or terminal device. For example, in other embodiments of the present application, the network device or terminal device may include more or fewer components than shown in the figure, or combine or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0094] Currently, terminal devices transmit a reference signal for measuring interference intensity within the active uplink BWP, calculate the CQI of uplink data transmission, and determine the MCS level of the uplink data, as shown in Figure 3a. If an uplink BWP switch occurs, the frequency domain position of the interference measurement reference signal transmitted by the terminal device does not coincide with the frequency domain position of the PUSCH scheduled on the BWP after the switch, resulting in a mismatch between the currently measured interference intensity and the interference intensity during future PUSCH scheduling, as shown in Figure 3b. Alternatively, if an uplink BWP switch occurs, the frequency domain position of the interference measurement reference signal transmitted by the terminal device does not completely coincide with the frequency domain position of the PUSCH scheduled on the BWP after the switch, which may result in a mismatch between the currently measured interference intensity and the interference intensity during future PUSCH scheduling, as shown in Figure 3c.

[0095] After and before the handover, multiple discontinuous BWPs may be activated simultaneously, or discontinuous RBs of one BWP may be scheduled, as shown in FIG3 d and FIG3 e.

[0096] The time-frequency resources in the shaded areas of FIG. 3 a to FIG. 3 e can be used to send reference signals.

[0097] When a BWP switch occurs, the PUSCH bandwidth after the switch falls outside the BWP before the switch. This prevents the terminal device from sending an interference measurement reference signal (IMRS) on the BWP after the switch, which is scheduled in the future. Furthermore, the terminal device cannot set the transmit power of the IMRRS. As a result, the currently measured interference strength reflects the interference within the BWP before the switch, rather than the interference within the BWP after the switch. This results in inaccurate uplink CQI measurements, inaccurate MCS levels, and reduced uplink data throughput.

[0098] The present application proposes a signal transmission method, which determines the interference measurement reference signal transmission power based on the bandwidth and subcarrier spacing of the BWP after switching and the BWP before switching, and sends the interference measurement reference signal on all or part of the RBs of the BWP after switching.

[0099] An embodiment of the present invention is described below with reference to FIG4 .

[0100] FIG4 is a signal transmission method provided by the present invention, comprising the following steps:

[0101] S401: The network device sends first indication information to the terminal device, and the terminal device obtains the first indication information, where the first indication information is used to indicate frequency domain resources occupied by one or more first bandwidth parts BWP and / or system parameters of one or more first BWPs.

[0102] Optionally, the first indication information may also be used to indicate the number of subcarriers and / or subcarrier spacing included in one or more BWPs.

[0103] Specifically, BWP may also be referred to as signal bandwidth, or may be other defined signal bandwidths.

[0104] Specifically, the first indication information may be sent via RRC signaling, or DCI, or MAC CE and other signaling or signals.

[0105] Specifically, the system parameters refer to the subcarrier spacing and CP length. For example, the first indication information may indicate that the subcarrier spacing of the first BWP is 60kHz and that an extended CP is used, or that the subcarrier spacing of the first BWP is 30kHz and that a normal CP is used.

[0106] Optionally, the first indication information may be used to configure a signal bandwidth candidate set for the terminal device. Taking a signal bandwidth of BWP as an example, the network device may configure a BWP candidate set for the terminal device in advance through the first indication information. The BWP candidate set may include multiple BWPs available to the terminal device and the number of resource blocks (RBs) and / or subcarrier spacing corresponding to the multiple BWPs.

[0107] For example, the BWP candidate set may include BWP1 and BWP2, where BWP1 includes RBs numbered 0-23 and BWP2 includes RBs numbered 16-31. Alternatively, BWP1 includes RBs numbered 0-31, 64-127 and BWP2 includes RBs numbered 30-63, 126-255.

[0108] In some implementations, the time-domain and frequency-domain granularity of the interference measurement reference signal corresponding to each BWP in the BWP candidate set is the same, as shown in FIG5a ; or, in some embodiments, the time-domain and / or frequency-domain granularity of the interference measurement reference signal corresponding to each BWP in the BWP candidate set is different, as shown in FIG5b .

[0109] S402: The terminal device sends a first reference signal within a first BWP, where the transmission power of the first reference signal is associated with the number of subcarriers and / or subcarrier spacing included in the first BWP and the second BWP, and the first BWP and the second BWP are different.

[0110] Specifically, the number of subcarriers and / or subcarrier spacing of the first BWP and the second BWP may be included in the number of subcarriers and / or subcarrier spacing of one or more BWPs indicated by the first indication information. For example, the first indication information may indicate that the first BWP includes 32 RBs, a subcarrier spacing of 60 kHz, and uses Extended CP, while indicating that the second BWP includes 64 RBs, and the subcarrier spacing and CP are the same as those of the first BWP. For another example, the first indication information may indicate that the first BWP includes 32 RBs, a subcarrier spacing of 60 kHz, and uses Extended CP, while indicating that the second BWP includes 64 RBs, a subcarrier spacing of 30 kHz, and uses Normal CP.

[0111] Specifically, the first indication information may indicate the BWP switching action, or the first indication information may indicate the BWP switching. The first BWP is the signal bandwidth after the switching, and the second BWP is the signal bandwidth before the switching.

[0112] Specifically, the first BWP is different from the second BWP, which can be understood as the first BWP and the second BWP do not overlap or partially overlap, or the frequency domain element (RE) corresponding to the first BWP is different from or partially the same as the frequency domain element corresponding to the second BWP.

[0113] For example, BWP1 includes RBs numbered 0-23, and BWP2 includes RBs numbered 16-31, so BWP1 is different from BWP2.

[0114] For another example, BWP1 includes RB numbers 0-31, 64-127, and BWP2 includes RB numbers 30-63, 126-255, so BWP1 and BWP2 are different.

[0115] For another example, BWP1 includes RBs numbered 0-12, and BWP2 includes RBs numbered 0-11, so BWP1 and BWP2 are different.

[0116] For another example, BWP1 includes REs numbered 0-255, and BWP2 includes REs numbered 0-254, so BWP1 and BWP2 are different.

[0117] Specifically, the second BWP may be the BWP currently being used by the terminal device.

[0118] Specifically, the reference signal can be used to measure interference signals, such as the interference strength of neighboring cell signals. The calculation result can then be used to calculate the signal-to-interference-plus-noise ratio (SINR) to obtain the uplink channel quality indicator (CQI). For example, if the reference signal is measured to obtain an SINR of -10 dB, the corresponding CQI can be calculated to be 3.

[0119] The reference signal may be a CSI-RS, an SRS, or a DMRS, or an interference measurement reference signal.

[0120] After obtaining the transmit power of the reference signal, the terminal device sends the first reference signal to the network device within the first BWP. The transmit power of the first reference signal is associated with the number of subcarriers and / or subcarrier spacing included in the first BWP and the second BWP.

[0121] Specifically, the transmit power of the first reference signal is associated with the number of subcarriers and / or subcarrier spacing included in the first BWP and the second BWP. For example, after the terminal device obtains the number of subcarriers and / or subcarrier spacing included in one or more BWPs, the transmit power of the reference signal can be calculated based on the number of subcarriers and / or subcarrier spacing of the first BWP and the number of subcarriers and / or subcarrier spacing of the second BWP.

[0122] The following describes how to calculate the transmit power of the first reference signal.

[0123] The transmit power of the first reference signal is P1, the transmit power of the second reference signal is P2, the difference between the transmit power of the first reference signal and the transmit power of the second reference signal is ΔP, ΔP = P1 - P2, the first reference signal is the reference signal sent on the first BWP, and the second reference signal is the reference signal sent on the second BWP.

[0124] Specifically, the difference ΔP between the transmit power of the first reference signal and the transmit power of the second reference signal satisfies the formula:

[0125] The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of RBs in the first BWP is The number of RBs for the second BWP is

[0126] Specifically, if the number of RBs of the first BWP is The number of RBs for the second BWP is The subcarrier spacing of the first BWP is The subcarrier spacing of the second BWP is f0 is a subcarrier spacing unit predefined by a protocol. The above formula can also be expressed as follows:

[0127] Alternatively, the dB value of ΔP is expressed as ΔP_dB. After calculating in the above manner, the actual value of ΔP can be calculated as

[0128] Specifically, the above formula can also be written as follows:

[0129] The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of REs in the first BWP is The RE number of the second BWP is

[0130] Specifically, if the number of REs of the first BWP is The RE number of the second BWP is The subcarrier spacing of the first BWP is The subcarrier spacing of the second BWP is f0 is a subcarrier spacing unit predefined by a protocol. The above formula can also be written as:

[0131] Alternatively, the dB value of ΔP is expressed as ΔP_dB. After calculating in the above manner, the actual value of ΔP can be calculated as

[0132] According to the above formula, the transmit power of the first reference signal can be calculated, so that the first reference signal is sent within the first BWP.

[0133] In this embodiment, the first BWP is the BWP after the BWP is switched, and the second BWP is the BWP before the BWP is switched. The first reference signal is sent on the first BWP after the switch, and the accurate reference signal transmit power is determined based on the difference between the bandwidth of the first BWP after the switch and the bandwidth of the second BWP before the switch. This ensures that the interference intensity on the future scheduled PUSCH is accurately measured.

[0134] Optionally, after receiving the first reference signal, the network device may measure interference intensity according to the first reference signal, calculate CQI, and determine scheduling information.

[0135] Specifically, the scheduling information includes the position and number of RBs occupied by the BWP, and the used MCS level (including modulation order, code rate and comprehensive spectrum efficiency).

[0136] For example, the scheduling information may be used to indicate that the RBs occupied by the BWP are numbered 0-15, and the MCS order is 20, the corresponding modulation order is 256QAM, the code rate is 0.67, and the comprehensive spectrum efficiency is 5.332.

[0137] Specifically, the CQI can be determined based on the measurement results of the first reference signal, and the scheduling information can be further determined. For example, by measuring the first reference signal and obtaining an SINR of 5dB, the CQI is calculated to be 5, and the MCS order is 9, corresponding to the modulation order of 16QAM, the code rate is 0.6, and the overall spectral efficiency is 2.4063. Based on the measurement results, the MCS order can be determined to be 9 when scheduling BWP, and the number of RBs is calculated to be 24 based on parameters such as the target throughput, SINR value, and power margin.

[0138] The above calculation of the transmit signal power can be obtained by, but not limited to, the following three methods:

[0139] Method 1: The power value of the transmitted signal is obtained by averaging the signal power of all REs occupied by PUSCH on the BWP before switching;

[0140] Method 2: The power value of the transmitted signal is obtained by averaging the signal power of all REs occupied by PUSCH-DMRS on the BWP before switching;

[0141] Method 3: The power value of the transmitted signal is the power of a PUSCH-DMRS RE on the BWP before switching.

[0142] Optionally, this embodiment may further include the following steps S403-S405:

[0143] S403: The network device sends second indication information, and the terminal device receives the second indication information, where the second indication information indicates the first BWP.

[0144] Specifically, the network device may send second indication information to the terminal device to indicate the first BWP, so that the terminal device switches the working BWP to the first BWP.

[0145] Specifically, the second indication information may be sent via RRC signaling, or DCI, or MAC CE and other signaling or signals.

[0146] S404: The network device sends third indication information, and the terminal device receives the third indication information, where the third indication information indicates scheduling information corresponding to the first BWP.

[0147] Specifically, the network device may send third indication information to the terminal device to indicate scheduling information corresponding to the first BWP, so that the terminal device switches the working BWP to the first BWP.

[0148] Specifically, the third indication information may be sent via RRC signaling, or DCI, or MAC CE and other signaling or signals.

[0149] Optionally, the second indication information and the third indication information may be carried in the same signaling or message and sent. In other words, the second indication information or the third indication information may indicate the first BWP and the scheduling information corresponding to the first BWP.

[0150] Specifically, the scheduling information includes the location and number of RBs occupied by the BWP, as well as the MCS level used (including modulation order, code rate, and overall spectral efficiency). For example, the scheduling information may indicate that the RBs occupied by the BWP are numbered 0-15, and the MCS order is 20, corresponding to a modulation order of 256QAM, a code rate of 0.67, and an overall spectral efficiency of 5.332.

[0151] S405: The terminal device sends an uplink signal to the network device within the first BWP, and the network device receives the uplink signal within the first BWP.

[0152] Specifically, after receiving the second indication information and / or third indication information sent by the network device, the terminal device can send an uplink signal to the network device in the first BWP, that is, the terminal device can send an uplink signal to the network device in the working BWP after switching.

[0153] Specifically, uplink signals may include uplink shared physical channel (PUSCH), uplink control physical channel (PUCCH), sounding reference signal (SRS), or other types of uplink signals such as channels / signals / reference signals not defined in the current protocol. Uplink signals may also be referred to as uplink data, uplink control information, or uplink reference signals.

[0154] Optionally, this embodiment may further include the step of: the terminal device sending an uplink signal in the second BWP before step S401 , that is, the terminal device sends an uplink signal in the second BWP before switching the BWP.

[0155] The solution of the embodiment of the present application transmits a reference signal on the switched BWP and determines the accurate reference signal transmit power based on the difference between the bandwidth of the switched BWP and the bandwidth of the pre-switching BWP. To address the problem of inaccurate uplink CQI measurements caused by inaccurate frequency domain position and power of the reference signal when signal bandwidth switching occurs, the reference signal is transmitted on the currently scheduled BWP and the reference signal transmit power is adjusted based on the configuration of the switched BWP and the current BWP, thereby improving CQI measurement accuracy and uplink throughput.

[0156] Another embodiment of the present invention will be described below with reference to FIG6 .

[0157] FIG6 is another signal transmission method provided by the present invention, comprising the following steps:

[0158] S601: The network device sends first indication information to the terminal device, and the terminal device obtains the first indication information, where the first indication information is used to indicate frequency domain resources occupied by at least one first uplink signal.

[0159] Specifically, the first uplink signal may be SRS / CQI-RS, DMRS+PUSCH, Front-load+Additional DMRS+PUSCH, PUCCH Format 0 / MsgA (PUSCH without DMRS), PUCCH Format 1, PUCCH Format 2, or PUCCH Format 3.

[0160] Specifically, the first uplink signal can be used to measure interference signals, such as measuring the interference strength of neighboring cell signals. The calculation result can then be used to calculate the signal-to-interference-plus-noise ratio (SINR) to obtain an uplink channel quality indicator (CQI). For example, if SINR = -10 dB is obtained by measuring the reference signal, the corresponding CQI = 3 can be calculated.

[0161] In some embodiments, the first indication information may be sent via RRC signaling, or DCI, or MAC CE and other signaling or signals.

[0162] S602: The terminal device sends at least one first uplink signal in the first BWP, and the network device receives the at least one first uplink signal.

[0163] S603: The terminal device sends at least one second uplink signal in the second BWP, and the network device receives the at least one second uplink signal.

[0164] Optionally, the terminal device may calculate the transmission power of the signal after receiving the first indication information. The above signal may be a first uplink signal.

[0165] Optionally, the terminal device receives configuration information, which includes the number of subcarriers and / or subcarrier spacing of the first BWP.

[0166] Specifically, BWP may also be referred to as signal bandwidth, or may be other defined signal bandwidths.

[0167] Specifically, the system parameters refer to the subcarrier spacing and CP length. For example, the configuration information may indicate that the subcarrier spacing of the first BWP is 60kHz and that an extended CP is used, or that the subcarrier spacing of the first BWP is 30kHz and that a normal CP is used.

[0168] Optionally, the configuration information can be used to configure a signal bandwidth candidate set for the terminal device. Taking the signal bandwidth as BWP as an example, the network device can configure the BWP candidate set for the terminal device in advance through configuration information. The BWP candidate set may include multiple BWPs available to the terminal device and the number of resource blocks (RBs) and / or subcarrier spacing corresponding to the multiple BWPs.

[0169] Optionally, the configuration information may be carried in the first indication information, or carried in the same signaling as the first indication information.

[0170] For example, the BWP candidate set may include BWP1 and BWP2, where BWP1 includes RBs numbered 0-23 and BWP2 includes RBs numbered 16-31. Alternatively, BWP1 includes RBs numbered 0-31, 64-127 and BWP2 includes RBs numbered 30-63, 126-255.

[0171] Specifically, the time domain symbol start time of sending the at least one first uplink signal is not later than the time domain symbol start time of sending the at least one second uplink signal. It is understandable that the first uplink signal is sent earlier than the second uplink signal in the time dimension.

[0172] Specifically, the frequency domain resources of the first BWP are different from the frequency domain resources of the second BWP.

[0173] In some embodiments, the number of subcarriers and / or subcarrier spacing of the first BWP and the second BWP may be included in the number of subcarriers and / or subcarrier spacing of one or more BWPs indicated in the configuration information. For example, the configuration information may indicate that the first BWP includes 32 RBs, a subcarrier spacing of 60 kHz, and uses Extended CP, while indicating that the second BWP includes 64 RBs, with the same subcarrier spacing and CP as the first BWP. For another example, the configuration information may indicate that the first BWP includes 32 RBs, a subcarrier spacing of 60 kHz, and uses Extended CP, while indicating that the second BWP includes 64 RBs, a subcarrier spacing of 30 kHz, and uses Normal CP.

[0174] Specifically, the first BWP is different from the second BWP, which can be understood as the first BWP and the second BWP do not overlap or partially overlap, or the frequency domain element (RE) corresponding to the first BWP is different from or partially the same as the frequency domain element corresponding to the second BWP.

[0175] For example, BWP1 includes RBs numbered 0-23, and BWP2 includes RBs numbered 16-31, so BWP1 is different from BWP2.

[0176] For another example, BWP1 includes RB numbers 0-31, 64-127, and BWP2 includes RB numbers 30-63, 126-255, so BWP1 and BWP2 are different.

[0177] For another example, BWP1 includes RBs numbered 0-12, and BWP2 includes RBs numbered 0-11, so BWP1 and BWP2 are different.

[0178] For another example, BWP1 includes REs numbered 0-255, and BWP2 includes REs numbered 0-254, so BWP1 and BWP2 are different.

[0179] Specifically, the second BWP may be the BWP currently being used by the terminal device.

[0180] Specifically, the second uplink signal may be SRS / CQI-RS, DMRS+PUSCH, Front-load+Additional DMRS+PUSCH, PUCCH Format 0 / MsgA (PUSCH without DMRS), PUCCH Format 1, PUCCH Format 2, or PUCCH Format 3. The second uplink signal may also be a signal such as uplink data.

[0181] Specifically, the transmit power of the first uplink signal is associated with the number of subcarriers and / or subcarrier spacing included in the first BWP and the second BWP. For example, after the terminal device obtains the number of subcarriers and / or subcarrier spacing included in one or more BWPs, the transmit power of the first uplink signal can be calculated based on the number of subcarriers and / or subcarrier spacing of the first BWP and the number of subcarriers and / or subcarrier spacing of the second BWP.

[0182] In some embodiments, the first uplink signal may be a first reference signal.

[0183] The following describes how to calculate the transmit power of the first reference signal by taking the first uplink signal as an example.

[0184] The transmit power of the first reference signal is P1, the transmit power of the second reference signal is P2, the difference between the transmit power of the first reference signal and the transmit power of the second reference signal is ΔP, ΔP = P1 - P2, the first reference signal is the reference signal sent on the first BWP, and the second reference signal is the reference signal sent on the second BWP.

[0185] Specifically, the difference ΔP between the transmit power of the first reference signal and the transmit power of the second reference signal satisfies the formula:

[0186] The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of RBs in the first BWP is The number of RBs for the second BWP is

[0187] Specifically, if the number of RBs of the first BWP is The number of RBs for the second BWP is The subcarrier spacing of the first BWP is The subcarrier spacing of the second BWP is f0 is a subcarrier spacing unit predefined by a protocol. The above formula can also be expressed as follows:

[0188] Alternatively, the dB value of ΔP is expressed as ΔP_dB. After calculating in the above manner, the actual value of ΔP can be calculated as

[0189] Specifically, the above formula can also be written as follows:

[0190] The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of REs in the first BWP is The RE number of the second BWP is

[0191] Specifically, if the number of REs of the first BWP is The RE number of the second BWP is The subcarrier spacing of the first BWP is The subcarrier spacing of the second BWP is f0 is a subcarrier spacing unit predefined by a protocol. The above formula can also be written as:

[0192] Alternatively, the dB value of ΔP is expressed as ΔP_dB. After calculating in the above manner, the actual value of ΔP can be calculated as

[0193] According to the above formula, the transmit power of the first reference signal can be calculated, so that the first reference signal is sent within the first BWP.

[0194] Optionally, after receiving the first reference signal, the network device may measure interference intensity according to the first reference signal, calculate CQI, and determine scheduling information.

[0195] Specifically, the scheduling information includes the position and number of RBs occupied by the BWP, and the used MCS level (including modulation order, code rate and comprehensive spectrum efficiency).

[0196] For example, the scheduling information may be used to indicate that the RBs occupied by the BWP are numbered 0-15, and the MCS order is 20, the corresponding modulation order is 256QAM, the code rate is 0.67, and the comprehensive spectrum efficiency is 5.332.

[0197] Specifically, the CQI can be determined based on the measurement results of the first reference signal, and the scheduling information can be further determined. For example, by measuring the first reference signal and obtaining an SINR of 5dB, the CQI is calculated to be 5, and the MCS order is 9, corresponding to the modulation order of 16QAM, the code rate is 0.6, and the overall spectral efficiency is 2.4063. Based on the measurement results, the MCS order can be determined to be 9 when scheduling BWP, and the number of RBs is calculated to be 24 based on parameters such as the target throughput, SINR value, and power margin.

[0198] The above calculation of the transmit signal power can be obtained by, but not limited to, the following three methods:

[0199] Method 1: The power value of the transmitted signal is obtained by averaging the signal power of all REs occupied by PUSCH on the BWP before switching;

[0200] Method 2: The power value of the transmitted signal is obtained by averaging the signal power of all REs occupied by PUSCH-DMRS on the BWP before switching;

[0201] Method 3: The power value of the transmitted signal is the power of a PUSCH-DMRS RE on the BWP before switching.

[0202] As shown in Figure 7a, after receiving the first indication information, the terminal device can send a first uplink signal to the network device, and the frequency domain resources of the first uplink signal are located within the first BWP. The terminal device subsequently sends a second uplink signal to the network device, and the frequency domain resources of the second uplink signal are located within the second BWP. The frequency domain resources of the first BWP and the frequency domain resources of the second BWP are different. The first BWP is the BWP after the BWP is switched, and the second BWP is the BWP before the BWP is switched. As shown in Figure 7b, the first uplink signal can be sent using frequency hopping.

[0203] Figures 8a to 8g show the distribution of different time-frequency resources of the first uplink signal, with the horizontal direction being the time domain direction and the vertical direction being the frequency domain direction. The time-frequency resources of the first uplink signal can be constructed and distributed in the following ways:

[0204] (1) Reference signal. For example, the time-frequency resource distribution of the reference signal shown in FIG8a. The reference signal may be a DMRS, SRS, channel quality measurement signal CQI-RS, or other signal;

[0205] (2) Reference signal + data signal / control signal. For example, the time-frequency resource distribution of the reference signal + data signal / control signal in Figures 8b, 8c, 8d, 8e, and 8f. The reference signal can be an SRS, a channel quality measurement signal CQI-RS, a DMRS signal, etc. The DMRS signal can be an additional DMRS signal or a front-load DMRS signal. The data signal / control signal can be a PUSCH signal or a PUCCH signal. The PUCCH signal can be a PUCCH Format 1 signal, a PUCCH Format 2 signal, a PUCCH Format 3 signal, etc.

[0206] (3) Data signal / control signal. For example, the time-frequency resource distribution of the data signal / control signal in FIG8g , the data signal / control signal may be a PUSCH signal or a PUCCH signal, the PUCCH signal may be a PUCCH Format 0 signal, etc., and the PUSCH signal may be a MsgA signal, etc.

[0207] Optionally, this embodiment may further include the following steps S604-S606:

[0208] S604: The network device sends second indication information, and the terminal device receives the second indication information, where the second indication information indicates the frequency domain resources occupied by the first BWP.

[0209] Specifically, the network device may send second indication information to the terminal device to indicate the frequency domain resources occupied by the first BWP, so that the terminal device switches the working BWP to the first BWP.

[0210] Specifically, the second indication information may be sent via RRC signaling, or DCI, or MAC CE and other signaling or signals.

[0211] S605: The network device sends third indication information, and the terminal device receives the third indication information, where the third indication information indicates scheduling information of a third uplink signal.

[0212] Specifically, the network device may send third indication information to the terminal device to indicate scheduling information corresponding to the first BWP, so that the terminal device switches the working BWP to the first BWP.

[0213] Specifically, the third indication information may be sent via RRC signaling, or DCI, or MAC CE and other signaling or signals.

[0214] Optionally, the second indication information and the third indication information may be carried in the same signaling or message and sent. In other words, the second indication information or the third indication information may indicate the first BWP and the scheduling information corresponding to the first BWP.

[0215] Specifically, the scheduling information includes the location and number of RBs occupied by the BWP, as well as the MCS level used (including modulation order, code rate, and overall spectral efficiency). For example, the scheduling information may indicate that the RBs occupied by the BWP are numbered 0-15, and the MCS order is 20, corresponding to a modulation order of 256QAM, a code rate of 0.67, and an overall spectral efficiency of 5.332.

[0216] S606: The terminal device sends a third uplink signal to the network device within the first BWP, and the network device receives the third uplink signal within the first BWP.

[0217] Specifically, after receiving the second indication information and / or third indication information sent by the network device, the terminal device can send a third uplink signal to the network device within the first BWP, that is, the terminal device can send a third uplink signal to the network device within the working BWP after switching.

[0218] Specifically, the third uplink signal may include an uplink shared physical channel (PUSCH), an uplink control physical channel (PUCCH), a sounding reference signal (SRS), or other types of uplink signals such as channels / signals / reference signals not defined in the current protocol. The third uplink signal may also be referred to as uplink data, uplink control information, or an uplink reference signal.

[0219] As shown in FIG. 7 a and FIG. 7 b , after receiving the second indication information, the terminal device may send a third uplink signal on the first BWP (ie, the BWP after switching).

[0220] The solution of the embodiment of the present application sends a first uplink signal on a BWP different from the BWP before switching. By measuring the first uplink signal, the network device can more accurately estimate the uplink channel quality, thereby determining more accurate uplink scheduling information (for example, MCS level) and improving the uplink throughput.

[0221] It is understood that in each of the above embodiments, the methods and / or steps implemented by the network device may also be implemented by components (e.g., chips or circuits) applicable to the network device. The methods and / or steps implemented by the terminal device may also be implemented by components (e.g., chips or circuits) applicable to the terminal device. The methods and / or steps implemented by the core network device may also be implemented by components (e.g., chips or circuits) applicable to the core network device.

[0222] The above description primarily describes the solutions provided by the embodiments of the present application from the perspective of interaction between various devices. Accordingly, the embodiments of the present application also provide a communication device for implementing the various methods described above. The communication device may be a network device in the method embodiments described above, or a device comprising such a network device, or a component usable in a network device. Alternatively, the communication device may be a terminal device in the method embodiments described above, or a device comprising such a terminal device, or a component usable in a terminal device. Alternatively, the communication device may be a core network device in the method embodiments described above, or a device comprising such a core network device, or a component usable in a core network device. It will be understood that, to implement the aforementioned functions, the communication device includes hardware structures and / or software modules corresponding to the respective functions. Those skilled in the art will readily appreciate that, in conjunction with the various exemplary units and algorithm steps described in the embodiments disclosed herein, the present application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Professionals skilled in the art may use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of the present application.

[0223] In the embodiment of the present application, the functional modules of the communication device can be divided according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0224] It is understandable that in order to implement the functions in the above embodiments, the terminal and network device include hardware structures and / or software modules corresponding to the execution of each function. It should be readily apparent to those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a manner driven by computer software depends on the specific application scenario and design constraints of the technical solution.

[0225] Figures 9 to 12 are schematic diagrams of possible communication devices provided in embodiments of the present application. These communication devices can be used to implement the functions of the terminal or network device in the above method embodiments, thereby also achieving the beneficial effects of the above method embodiments.

[0226] As shown in FIG9 , which is a schematic structural diagram of a communication device provided in an embodiment of the present application, the communication device 1300 includes a transceiver unit 1301 and a processing unit 1302 .

[0227] When the communication device 1300 is used to implement the functions of the terminal device in the method embodiment shown in FIG4 , the transceiver unit 1301 is used to execute the operations of the terminal device in the embodiment shown in FIG4 .

[0228] When the communication device 1300 is used to implement the functions of the terminal device in the method embodiment shown in FIG6 , the transceiver unit 1301 is used to execute the operations of the terminal device in the embodiment shown in FIG6 .

[0229] When the communication device 1300 is used to implement the functions of the network device in the method embodiment shown in FIG4 , the transceiver unit 1301 is used to perform the operations of the network device in the embodiment shown in FIG4 .

[0230] When the communication device 1300 is used to implement the functions of the network device in the method embodiment shown in FIG6 , the transceiver unit 1301 is used to perform the operations of the network device in the embodiment shown in FIG6 .

[0231] Figure 10 shows a simplified structural diagram of a terminal device. For ease of understanding and illustration, in Figure 10, a mobile phone is used as an example of a terminal. As shown in Figure 10, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and input and output devices. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. For example, some types of terminal devices may not have input and output devices.

[0232] When sending data, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in Figure 10. In actual terminal equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be set independently of the processor or integrated with the processor, and this embodiment of the application does not limit this.

[0233] In the embodiment of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the receiving unit and the sending unit of the terminal device (also collectively referred to as the transceiver unit), and the processor with the processing function can be regarded as the processing unit of the terminal. As shown in Figure 10, the terminal includes a transceiver unit 1401 and a processing unit 1402. The transceiver unit 1401 can also be called a receiver / transmitter (transmitter), a receiver / transmitter, a receiving / transmitting circuit, etc. The processing unit 1402 can also be called a processor, a processing board, a processing module, a processing device, etc. The transceiver unit 1401 is used to implement the functions of the transceiver unit 1301 in the embodiment shown in Figure 9; the processing unit 1402 is used to implement the functions of the processing unit 1302 in the embodiment shown in Figure 9.

[0234] Figure 11 shows a simplified schematic diagram of the structure of a network device. The network device includes a radio frequency signal transceiver and conversion section and section 1502, which in turn includes a transceiver unit 1501. The radio frequency signal transceiver and conversion section is primarily used for receiving and transmitting radio frequency signals and converting radio frequency signals to baseband signals; section 1502 is primarily used for baseband processing and controlling the network device. Transceiver unit 1501 may also be referred to as a receiver / transmitter (transmitter), a receiver / transmitter, a receiving / transmitting circuit, etc. Section 1502 is typically the control center of the network device and can generally be referred to as a processing unit, which is used to control the network device to execute the steps performed by the network device in Figures 4 or 6 above. For details, please refer to the description of the relevant sections above. Transceiver unit 1501 can be used to implement the functions of transceiver unit 1301 in the embodiment shown in Figure 9, and section 1502 is used to implement the functions of processing unit 1302 in the embodiment shown in Figure 9.

[0235] Section 1502 may include one or more boards, each of which may include one or more processors and one or more memories. The processors are used to read and execute programs in the memories to implement baseband processing functions and control network devices. If multiple boards are present, the boards may be interconnected to increase processing power. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may simultaneously share one or more processors.

[0236] As shown in Figure 12, which is a schematic diagram of the structure of another communication device provided in an embodiment of the present application, the communication device 1600 includes a processor 1601 and an interface circuit 1602. The processor 1601 and the interface circuit 1602 are coupled to each other. It is understood that the interface circuit 1602 can be a transceiver or an input / output interface. Optionally, the communication device 1600 may also include a memory 1603 for storing instructions executed by the processor 1601, or storing input data of the processor 1601 when executing instructions, or storing data generated after the processor 1601 executes instructions.

[0237] When the communication device 1600 is used to implement the method shown in FIG. 4 or FIG. 6 , the processor 1601 is used to implement the functions of the processing unit 1302 , and the interface circuit 1602 is used to implement the functions of the transceiver unit 1301 .

[0238] When the communication device is a chip used in a terminal device, the chip is used to implement the functions of the terminal device in the above method embodiments. The chip receives information from other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent to the terminal device by a network device or other device; or the chip sends information to other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent to the network device or other device by the terminal device.

[0239] When the communication device is a chip used in a network device, the chip is used to implement the functions of the network device in the above method embodiments. The chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent to the network device by a terminal or other device; or the chip sends information to other modules in the network device (such as a radio frequency module or antenna), and the information is sent to the terminal device or other device by the network device.

[0240] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0241] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a compact disc read-only memory (CD-ROM) or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in the first node. Of course, the processor and the storage medium can also be present in the terminal device as discrete components.

[0242] An embodiment of the present application also provides a communication system, including the above-mentioned communication device.

[0243] An embodiment of the present application further provides a computer-readable storage medium having a computer program or instruction stored thereon. When the program or instruction is executed by a processor, the method described in the above embodiment is executed.

[0244] The embodiments of the present application also provide a computer program product, which, when executed on a computing device, enables the method described in the above embodiments to be executed.

[0245] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive.

[0246] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0247] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next related objects are in an "or" relationship; in the formulas of this application, the character " / " indicates that the previous and next related objects are in a "division" relationship.

[0248] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A signal transmission method, characterized in that, The method includes: Obtaining first indication information, where the first indication information is used to indicate the frequency-domain resources occupied by at least one first uplink signal; Transmitting at least one first uplink signal within a first BWP; Transmitting at least one second uplink signal within a second BWP; Wherein, the start time of the time-domain symbol for transmitting the at least one first uplink signal is not later than the start time of the time-domain symbol for transmitting the at least one second uplink signal, and the frequency-domain resources of the first BWP and the frequency-domain resources of the second BWP are different.

2. The method according to claim 1, wherein The transmission power of the first uplink signal is determined according to the number of subcarriers and / or subcarrier spacing included in the first BWP and the second BWP.

3. The method according to claim 2, wherein The method further includes: Receiving configuration information, where the configuration information includes the number of subcarriers and / or subcarrier spacing of the first BWP.

4. The method according to any one of claims 1 to 3, characterized in that The method further includes: Receiving second indication information, where the second indication information indicates the frequency-domain resources occupied by the first BWP.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: Receiving third indication information, where the third indication information indicates the scheduling information of a third uplink signal.

6. The method according to claim 5, wherein The method further includes: Transmitting the third uplink signal within the first BWP according to the scheduling information.

7. The method according to claim 6, characterized in that, The start time of the time-domain symbol for transmitting the third uplink signal is not earlier than the start time of the time-domain symbol for transmitting the second uplink signal.

8. The method according to any one of claims 1-7, wherein The transmission power of the first uplink signal is P1, the transmission power of the second uplink signal is P2, and the difference between the transmission power of the first uplink signal and the transmission power of the second uplink signal is ΔP, ΔP = P1 - P2.

9. The method according to claim 8, characterized in that, The difference ΔP between the transmission power of the first uplink signal and the transmission power of the second uplink signal satisfies the formula: The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2.

10. The method according to any one of claims 1-9, characterized in that, The first uplink signal and / or the second uplink signal are used to calculate the uplink channel quality indicator CQI, and the scheduling information is determined according to the CQI or the first uplink signal.

11. A signal transmission method, characterized in that, The method includes: Transmitting first indication information, where the first indication information is used to indicate the frequency-domain resources occupied by at least one first uplink signal; Receiving at least one first uplink signal within a first BWP; Receiving at least one second uplink signal within a second BWP; Wherein, the frequency-domain resources of the first BWP and the frequency-domain resources of the second BWP are different.

12. The method according to claim 11, wherein The transmission power of the first uplink signal is determined according to the number of subcarriers and / or subcarrier spacing included in the first BWP and the second BWP.

13. The method according to claim 12, wherein The method further includes: Transmitting configuration information, where the configuration information includes the number of subcarriers and / or subcarrier spacing of the first BWP.

14. The method according to any one of claims 11-13, characterized in that The method further includes: Transmitting second indication information, where the second indication information indicates the frequency-domain resources occupied by the first BWP.

15. The method according to any one of claims 11 - 14, characterized in that, The method further includes: Transmitting third indication information, where the third indication information indicates the scheduling information of a third uplink signal.

16. The method according to claim 15, wherein The method further includes: Receiving the third uplink signal within the first BWP.

17. The method according to any one of claims 11-16, wherein The transmission power of the first uplink signal is P1, the transmission power of the second uplink signal is P2, and the difference between the transmission power of the first uplink signal and the transmission power of the second uplink signal is ΔP, where ΔP = P1 - P2.

18. The method according to claim 17, wherein The difference ΔP between the transmission power of the first uplink signal and the transmission power of the second uplink signal satisfies the formula: The subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2.

19. The method according to any one of claims 11-18, characterized in that, The first uplink signal and / or the second uplink signal are used to calculate the uplink channel quality indicator CQI, and the scheduling information is determined according to the CQI or the first uplink signal.

20. A communication device, characterized in that, The communication device includes: a processor, the processor is coupled to a memory, the memory is used to store computer execution instructions, and the processor is used to execute the instructions stored in the memory; when the instructions are run by the processor, the communication device is caused to execute the method according to claims 1-10.

21. A communication device, characterized in that, The communication device includes: a processor, the processor is coupled to a memory, the memory is used to store computer execution instructions, and the processor is used to execute the instructions stored in the memory; when the instructions are run by the processor, the communication device is caused to execute the method according to any one of claims 11-19.

22. A computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by a computer, the method according to any one of claims 1-10 or claims 11-19 is caused to be executed.

23. A communication system, characterized in that, The communication system includes a terminal device and a network device; the terminal device is used to execute the method according to any one of claims 1-10; the network device is used to execute the method according to any one of claims 11-19.

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