Signal transmission method, device and system

Abstract

The invention provides a data transmission method, device and system, and is applied to the technical field of communication. The data transmission method provided by the invention comprises the following steps: acquiring first indication information, wherein the first indication information is used for indicating a frequency domain resource occupied by at least one first uplink signal; at least one first uplink signal is sent in the first BWP; at least one second uplink signal is sent in the second BWP; wherein the starting time of the time domain symbol for sending the at least one first uplink signal is not later than the starting time of the time domain symbol 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

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a signal transmission method, apparatus, and system. Background Art

[0002] Terminal devices in 5G New Radio (NR) generally have a large demand for uplink data transmission rate. Due to the limited bandwidth of terminal devices, generally, an NR network device needs to allocate different bandwidths for uplink data transmission, i.e., uplink bandwidth parts (BWPs), to different terminal devices. Before transmitting uplink data, it is necessary to calculate the uplink channel quality indicator (CQI) based on channel measurement results, and then determine the modulation and coding scheme (MCS) level for uplink data transmission. The measurement result of the uplink CQI is related to the signal-to-interference-plus-noise ratio (SINR) of the signal and is limited by the intensity of the interference signal. Since the scheduling conditions of different cells are different in the frequency domain, the interference intensities on different resource blocks (RBs) in the frequency domain are different. If the RBs within the BWP where the current terminal device is operating are strongly interfered by the signals of other terminal devices, it is necessary to switch the uplink BWP currently used by the current terminal device to another new BWP to reduce the influence degree of the interference signal on the uplink data transmission rate.

[0003] When the uplink BWP of the terminal device switches, 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 the mismatch between the currently measured interference intensity and the interference intensity during future PUSCH scheduling. Summary of the Invention

[0004] Embodiments of this application provide a signal transmission method, apparatus, and system for solving the problem of the mismatch in the frequency domain position of the PUSCH scheduled on the BWP after the terminal device switches.

[0005] To achieve the above object, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a signal transmission method is provided. This method can be executed by a terminal device, or by components of the terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the terminal device. Hereinafter, taking the terminal device as the execution entity of this method as an example, 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 at least one first uplink signal is not later than the start time of the time-domain symbol for transmitting at least one second uplink signal, and the frequency-domain resources of the first BWP and the second BWP are different.

[0007] Through the above method, the first uplink signal is transmitted on a BWP different from the BWP before handover. The network device can more accurately estimate the uplink channel quality by measuring the first uplink signal, thereby determining more accurate uplink scheduling information (such as the MCS level) and improving the uplink throughput.

[0008] In a possible implementation manner, the transmission 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.

[0009] In a possible implementation manner, the method further includes: receiving configuration information, where the configuration information includes the number of subcarriers and / or the subcarrier spacing of the first BWP.

[0010] In a possible implementation manner, the method further includes: receiving second indication information, where the second indication information indicates the frequency-domain resources occupied by the first BWP.

[0011] In a possible implementation manner, the method further includes: receiving third indication information, where the third indication information indicates the scheduling information of a third uplink signal.

[0012] In a possible implementation manner, the method further includes: according to the scheduling information, transmitting a third uplink signal within the first BWP.

[0013] In a possible implementation manner, 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.

[0014] In a possible implementation manner, 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.

[0015] In a possible implementation, the difference ΔP between the transmission power of the first uplink signal and the transmission power of the second uplink signal satisfies the formula:

[0016]

[0017] where 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 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.

[0019] In a second aspect, a signal transmission method is provided. This method can be executed by a network device, or by a component of a terminal device (such as a processor, a chip, or a chip system, etc.), or can also be implemented by a logic module or software that can implement all or part of the functions of the terminal device. Hereinafter, taking the terminal device as the execution subject of this method as an example for description, this method includes: sending 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 the first BWP; receiving at least one second uplink signal within the second BWP; where the frequency domain resources of the first BWP and the second BWP are different.

[0020] Through the above method, the first uplink signal is transmitted on a BWP different from the BWP before handover. The network device can more accurately estimate the uplink channel quality by measuring the first uplink signal, so as to determine more accurate uplink scheduling information (for example, the MCS level), and improve the uplink throughput.

[0021] In a possible implementation, the transmission 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, this 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, this 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, this method further includes: sending third indication information, where the third indication information indicates the scheduling information of the third uplink signal.

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

[0026] In a possible implementation, 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.

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

[0028]

[0029] where the subcarrier spacing of the first BWP is Δf1 and the subcarrier spacing of the second BWP is Δf2.

[0030] In a possible implementation, 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.

[0031] In a third aspect, a communication device is provided, which 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 of the first aspect.

[0032] In a fourth aspect, a communication device is provided, which 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 of the second aspect.

[0033] In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a computer, the methods in the first aspect or the second aspect are caused to be executed.

[0034] 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 of the first aspect; the network device is used to execute the method in the second aspect.

[0035] 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 achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that specific technical features, technical solutions or beneficial effects are included in at least one embodiment. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an 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

[0036] Figure 1 A schematic diagram of a network system architecture provided by an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0038] Figure 3a An interaction schematic diagram of a data transmission method provided by an embodiment of the present application;

[0039] Figure 3b An interaction schematic diagram of another data transmission method provided by an embodiment of the present application;

[0040] Figure 3c An interaction schematic diagram of yet another data transmission method provided by an embodiment of the present application;

[0041] Figure 3d An interaction schematic diagram of yet another data transmission method provided by an embodiment of the present application;

[0042] Figure 3e An interaction schematic diagram of yet another data transmission method provided by an embodiment of the present application;

[0043] Figure 4 An interaction schematic diagram of a data transmission method provided by an embodiment of the present application;

[0044] Figure 5a A time-frequency resource allocation diagram provided by an embodiment of the present application;

[0045] Figure 5b Another time-frequency resource allocation diagram provided by an embodiment of the present application;

[0046] Figure 6 An interaction schematic diagram of another data transmission method provided by an embodiment of the present application;

[0047] Figure 7a Schematic diagram of another data transmission method provided by an embodiment of the present application;

[0048] Figure 7b Schematic diagram of another data transmission method provided by an embodiment of the present application;

[0049] Figure 8a Another time-frequency resource distribution diagram provided by an embodiment of the present application;

[0050] Figure 8b Another time-frequency resource distribution diagram provided by an embodiment of the present application;

[0051] Figure 8c Another time-frequency resource distribution diagram provided by an embodiment of the present application;

[0052] Figure 8d Another time-frequency resource distribution diagram provided by an embodiment of the present application;

[0053] Figure 8e Another time-frequency resource distribution diagram provided by an embodiment of the present application;

[0054] Figure 8f Another time-frequency resource distribution diagram provided by an embodiment of the present application;

[0055] Figure 8g Another time-frequency resource distribution diagram provided by an embodiment of the present application;

[0056] Figure 9 Schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0057] Figure 10 Schematic diagram of the structure of a simplified terminal provided by an embodiment of the present application;

[0058] Figure 11 Schematic diagram of the structure of a simplified network device provided by an embodiment of the present application;

[0059] Figure 12 Schematic diagram of the structure of another communication device provided by an embodiment of the present application. Detailed implementation manners

[0060] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Among them, in the description of the present application, unless otherwise specified, " / " means that the objects associated before and after are in an "or" relationship. For example, A / B may represent A or B; "and / or" in the present application is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. These three situations, where A and B may be singular or plural. Also, in the description of the present application, unless otherwise specified, "a plurality of" means two or more than two. "At least one (item)" or similar expressions thereof refer to any combination of these items, including any combination of single items (items) or plural items (items). For example, at least one (item) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c may be single or multiple. In addition, in order to facilitate a clear description of the technical solutions in the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not necessarily limit to be different. 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 solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner for easy understanding.

[0061] The resource allocation method provided by the embodiments of this application can be applicable to various communication systems. For example, the resource allocation method provided by the embodiments of this application can be applied to a 3rd generation partnership project (3GPP) communication system, such as a long term evolution (LTE) system, a 5th generation (5G) system, a vehicle to everything (V2X) system, a system with hybrid networking of LTE and NR, or a device-to-device (D2D) system, a machine to machine (M2M) communication system, an Internet of Things (IoT). Alternatively, 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. The embodiments of this application do not make specific limitations thereto. In addition, the term "system" can be replaced with "network" interchangeably.

[0062] The terminal device in the embodiments of this application can be referred to as a UE, and the network device can be referred to as a base station or a gNB.

[0063] It should be noted that the network architecture and service scenarios described in the embodiments of this application are for more clearly explaining the technical solutions of the embodiments of this application, and do not constitute a limitation to the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art can know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of this application are equally applicable to similar technical problems.

[0064] 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 device in the embodiment of the present application may include various forms of base stations, for example, a macro base station, a micro base station (also called 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 the base station function in a communication system that evolves after 5G, a mobile switching center, and a device that performs the base station function 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 completes 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 (Radio) 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).

[0065] In another possible scenario, multiple network devices cooperate to assist a terminal in achieving wireless access. Different network devices respectively implement some functions of the access network. For example, the network device in this application can be composed of multiple network devices, 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 implemented by some of the multiple network devices. For example, the network device can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the 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 a radio frequency unit, such as included in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0066] In different systems, the 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, the CU can also be called an O-CU (open CU), the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, the CU-UP can also be called an O-CU-UP, and the RU can also be called an O-RU. For the convenience of description, in this application, the CU, CU-CP, CU-UP, DU, and RU are used as examples for description. Any one of the 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.

[0067] Optionally, the terminal device in the embodiments of the present application may be a device with wireless transceiver functions, and may also be referred to as a terminal. Specifically, the terminal device may refer to a user equipment, an access terminal, a subscriber unit, a user station, a mobile station, a customer-premises equipment (CPE), a remote station, a remote terminal, a mobile device, a mobile terminal, a user terminal, a wireless communication device, a user agent, or a user device, etc. 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 functions, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication functions, a computing device, or other processing devices 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, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, or a terminal device in a future communication network, etc. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the terminal device. All or part of the functions of the terminal device may 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).

[0068] Figure 1 The 5G network architecture diagram is given. The following combines Figure 1 to describe the 5G network structure in detail.

[0069] 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, and Unified Data Management 108 (UDM).

[0070] UE 101 refers to network terminal devices such as mobile phones and Internet of Things terminal devices.

[0071] RAN 102 is a device that provides wireless access for terminal devices, including but not limited to eNodeB, WiFi AP, WiMAX BS, etc.

[0072] AMF 105 is mainly responsible for mobility management in the mobile network, such as user location update, user registration to the network, user handover, etc.

[0073] SMF 106 is mainly responsible for session management in the mobile network, such as session establishment, modification, and release. Specific functions include allocating IP addresses for users and selecting UPF 103 that provides packet forwarding functions, etc.

[0074] PCF 107 is responsible for providing policies to AMF and SMF, such as QoS policies and slice selection policies, etc.

[0075] UDM 108 is used to store user data, such as subscription information, authentication / authorization information.

[0076] AF (Application Function) is responsible for providing services to the 3GPP network, such as influencing service routing and interacting with PCF for policy control, etc.

[0077] UPF 103 is mainly responsible for processing user packets, such as forwarding and charging, etc.

[0078] DN 104 refers to the operator network that provides data transmission services for users, such as IMS (IP Multi-media Service) and Internet, etc.

[0079] The UE accesses the data network (DN) by establishing a PDU session between the UE, the RAN, the UPF, and the DN.

[0080] In the discussions on the evolution of the currently disclosed network architecture, it has been proposed that the next step in the evolution of the wireless network architecture is expected to introduce the SBA network architecture, that is, the service-oriented RAN, or in other words, introduce service-oriented interfaces for network devices. The service-oriented RAN architecture has the following advantages:

[0081] Based on service orientation, end-to-end unified orchestration is achieved, such as unified service discovery, service invocation, etc. It reduces the functional coupling between network elements and improves the speed of feature rollout; from a performance perspective, the service-oriented RAN architecture can reduce the number of signaling transmission hops and enable rapid connection establishment. Under the service-oriented RAN architecture, one existing technical route is that the RAN stores the user context and does not release it until the UE deregisters. This architecture can simplify downlink signaling addressing (the core network elements directly interact with the network devices), avoid the path detour caused by downlink signaling, and the problem of asymmetry between the uplink and downlink processes. In this network architecture, since the base station can be directly connected to all CN elements, the mobility management and context management of the UE no longer need to rely on the AMF for centralized management. The RAN can manage the UE context without the need to relay messages through the AMF. This technology features direct interaction between the RAN and the 5GC NF without going through the AMF. Currently, in the NR technology, there is a technology related to the management of inactive state terminals where the RAN manages the UE context and is responsible for part of the mobility management. For this technology, the RAN manages and migrates the UE context, which is transparent to the 5GC.

[0082] Optionally, the network device, terminal device, or core network device in the embodiments of the present application can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water; it can also be deployed on airplanes, balloons, and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the network device, terminal device, or core network device.

[0083] Optionally, the network device and the terminal device in the embodiments of the present application can communicate through authorized spectrum, or through unlicensed spectrum, or through both authorized spectrum and unlicensed spectrum at the same time. The network device and the terminal device can communicate through spectrum below 6 gigahertz (GHz), or through spectrum above 6 GHz, or through both spectrum below 6 GHz and 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.

[0084] Optionally, the network device, terminal device, or core network device in the embodiments of the present application may also be referred to as a communication device, which may be a general-purpose device or a dedicated device. The embodiments of the present application do not make specific limitations thereto.

[0085] Optionally, in specific implementation, the terminal device, network device, or core network device may adopt the composition structure shown in FIG. 7, or include Figure 2 the components shown. Figure 2 FIG. 7 is a schematic diagram of the composition of a communication device 200 provided by the present application. The communication device 200 may be a terminal device, or a chip or system-on-chip in the terminal device; or, it may be a network device, or a module, chip, or system-on-chip in the network device; or, it may be a core network device, or a module, chip, or system-on-chip in the core network device.

[0086] As Figure 2 shown, the communication device 200 includes at least one processor 201 and at least one communication interface ( Figure 2 only for example, taking including one communication interface 204 and one processor 201 as an example). Optionally, the communication device 200 may further include a communication bus 202 and a memory 203.

[0087] The processor 201 may be a general-purpose central processing unit (CPU), general-purpose processor, network processor (NP), digital signal processor (DSP), microprocessor, microcontroller, programmable logic device (PLD), or any combination thereof. The processor 701 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0088] The communication bus 202 is used to connect different components in the communication device 200 so that different components can communicate. The communication bus 202 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. This bus may be divided into an address bus, a data bus, a control bus, etc. For the sake of simplicity of representation, Figure 2 only a thick line is used in FIG. 7 to represent it, but it does not mean that there is only one bus or one type of bus.

[0089] A communication interface 204 for communicating with other devices or communication networks. Exemplarily, the communication interface 204 may be a module, a circuit, a transceiver, or any device capable of implementing communication. Optionally, the communication interface 204 may also be an input / output interface located within the processor 201 for implementing signal input and signal output of the processor.

[0090] A memory 203, which may be a device with a storage function for storing instructions and / or data. Among them, the instructions may be computer programs.

[0091] 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. It may also be 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, without limitation.

[0092] It should be noted that the memory 203 may exist independently of the processor 201 or be integrated with the processor 201. The memory 203 may be located inside the communication device 200 or outside the communication device 200, without limitation. The processor 201 may be used to execute the instructions stored in the memory 203 to implement the method provided in the following embodiments of this application.

[0093] 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 various ways. For example, the output device 205 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 206 communicates with the processor 201 and can receive user input in various ways. For example, the input device 206 may be a mouse, a keyboard, a touch screen device, or a sensing device, etc.

[0094] It should be noted thatFigure 2 The structures shown do not specifically limit the network device or the terminal device. For example, in some other embodiments of the present application, the network device or the terminal device may include more or fewer components than those shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The components shown in the figure can be implemented in hardware, software, or a combination of software and hardware.

[0095] Currently, the terminal device sends a reference signal for measuring the interference intensity within the currently working uplink BWP, calculates the CQI for uplink data transmission, and determines the MCS level of the uplink data, as Figure 3a shown. If an uplink BWP handover occurs, the frequency-domain position of the interference measurement reference signal sent by the terminal device does not coincide with the frequency-domain position of the PUSCH scheduled on the BWP after the handover, resulting in a mismatch between the currently measured interference intensity and the interference intensity during future PUSCH scheduling, as Figure 3b shown. Or, if an uplink BWP handover occurs, the frequency-domain position of the interference measurement reference signal sent by the terminal device does not completely coincide with the frequency-domain position of the PUSCH scheduled on the BWP after the handover, which may lead to a mismatch between the currently measured interference intensity and the interference intensity during future PUSCH scheduling, as Figure 3c shown.

[0096] Before and after the handover, multiple discontinuous BWPs may be simultaneously activated, or non-continuous RB scheduling of one BWP may occur, as Figure 3d and Figure 3e shown.

[0097] The above Figure 3a - The time-frequency resources in the shaded part of FIG. 3 can be used to send reference signals.

[0098] When a BWP handover occurs, the bandwidth of the PUSCH after the handover is outside the BWP before the handover, resulting in the terminal device being unable to send an interference measurement reference signal on the BWP after the future scheduling. At the same time, the transmission power of the interference measurement reference signal of the terminal device cannot be set, resulting in the currently measured interference intensity being the interference within the BWP before the handover rather than the interference within the BWP after the handover. This causes inaccurate measurement results of the uplink CQI, resulting in an inaccurate MCS level and a decrease in the throughput of uplink data transmission.

[0099] The present application proposes a signal transmission method, which determines the transmission power of the interference measurement reference signal based on the bandwidth and subcarrier spacing of the BWP after the handover and the BWP before the handover, and sends the interference measurement reference signal on all or part of the RBs of the BWP after the handover.

[0100] The following Figure 4 introduces the embodiments of the present invention.

[0101] Figure 4 A signal transmission method provided by the present invention includes the following steps:

[0102] S401: The network device sends first indication information to the terminal device, and the terminal device acquires the first indication information. The first indication information is used to indicate the frequency domain resources occupied by one or more first bandwidth parts (BWPs) and / or the system parameters of one or more first BWPs.

[0103] Optionally, the first indication information can also be used to indicate the number of subcarriers and / or the subcarrier spacing included in one or more BWPs.

[0104] Specifically, the BWP can also be referred to as the signal bandwidth, and the BWP can also be other defined signal bandwidths.

[0105] Specifically, the first indication information can be sent through signaling or signals such as RRC signaling, DCI, or MAC CE.

[0106] Specifically, the system parameters refer to the subcarrier spacing and the CP length. For example, the first indication information can indicate that the subcarrier spacing of the first BWP is 60 kHz and the extended CP (Extended CP) is used, or indicate that the subcarrier spacing of the first BWP is 30 kHz and the normal CP (Normal CP) is used.

[0107] Optionally, the first indication information can be used to configure a signal bandwidth candidate set for the terminal device. Taking the signal bandwidth as the BWP as an example, the network device can configure a BWP candidate set for the terminal device in advance through the first indication information. The BWP candidate set can include multiple BWPs available to the terminal device and the number of resource blocks (RBs) and / or the subcarrier spacing corresponding to the multiple BWPs.

[0108] For example, the BWP candidate set can include BWP1 and BWP2, where the RB numbers included in BWP1 are 0 - 23, and the RB numbers included in BWP2 are 16 - 31. Or, the RB numbers included in BWP1 are 0 - 31, 64 - 127, and the RB numbers included in BWP2 are 30 - 63, 126 - 255.

[0109] In some implementation manners, the time - frequency domain granularity of the interference measurement reference signal corresponding to each BWP in the BWP candidate set is the same, as shown in Figure 5a ; or, in some embodiments, the time domain granularity and / or the frequency domain granularity of the interference measurement reference signal corresponding to each BWP in the BWP candidate set are different, as shown in Figure 5b shown.

[0110] S402: The terminal device transmits a first reference signal within a first BWP, and the transmission power of the first reference signal is associated with the number of subcarriers and / or the subcarrier spacing included in the first BWP and the second BWP, where the first BWP and the second BWP are different.

[0111] Specifically, the number of subcarriers and / or the subcarrier spacing of the first BWP and the second BWP may be included in the number of subcarriers and / or the 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, the subcarrier spacing is 60 kHz, and Extended CP is used, while indicating that the second BWP includes 64 RBs, and the subcarrier spacing and CP are the same as those of the first BWP. Another example is that the first indication information may indicate that the first BWP includes 32 RBs, the subcarrier spacing is 60 kHz, and Extended CP is used, while indicating that the second BWP includes 64 RBs, the subcarrier spacing is 30 kHz, and Normal CP is used.

[0112] Specifically, the first indication information may indicate the action of BWP switching, or the first indication information may indicate to perform BWP switching. The first BWP is the signal bandwidth after switching, and the second BWP is the signal bandwidth before switching.

[0113] Specifically, the fact that the first BWP is different from the second BWP can be understood as the first BWP and the second BWP do not overlap or partially overlap, or the frequency domain units (REs) corresponding to the first BWP and the second BWP are not the same or partially the same.

[0114] For example, if the RB numbers included in BWP1 are 0 - 23 and the RB numbers included in BWP2 are 16 - 31, then BWP1 is different from BWP2.

[0115] Another example is that if the RB numbers included in BWP1 are 0 - 31, 64 - 127 and the RB numbers included in BWP2 are 30 - 63, 126 - 255, then BWP1 is different from BWP2.

[0116] Another example is that if the RB numbers included in BWP1 are 0 - 12 and the RB numbers included in BWP2 are 0 - 11, then BWP1 is different from BWP2.

[0117] Another example is that if the RE numbers included in BWP1 are 0 - 255 and the RE numbers included in BWP2 are 0 - 254, then BWP1 is different from BWP2.

[0118] Specifically, the second BWP may be the BWP currently being used by the terminal device.

[0119] Specifically, the reference signal can be used to measure interference signals, such as measuring the interference intensity of neighboring cell signals. Subsequently, the calculation result can be used to calculate the signal-to-interference-plus-noise ratio (SINR) to obtain the 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.

[0120] The reference signal can be CSI-RS, SRS, DMRS, or an interference measurement reference signal.

[0121] After the terminal device obtains the transmission power of the reference signal, it sends a first reference signal to the network device within the first BWP. 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.

[0122] Specifically, 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. For example, after the terminal device obtains the number of subcarriers and / or subcarrier spacing included in one or more BWPs, it can calculate the transmission power of the reference signal 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.

[0123] Next, introduce how to calculate the transmission power of the first reference signal.

[0124] The transmission power of the first reference signal is P1, the transmission power of the second reference signal is P2, and the difference between the transmission power of the first reference signal and the transmission power of the second reference signal is ΔP, where ΔP = P1 - P2. The first reference signal is the reference signal transmitted on the first BWP, and the second reference signal is the reference signal transmitted on the second BWP.

[0125] Specifically, the difference ΔP between the transmission power of the first reference signal and the transmission power of the second reference signal satisfies the formula:

[0126]

[0127] where the subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of resource blocks (RBs) of the first BWP is The number of RBs of the second BWP is

[0128] Specifically, if the number of RBs of the first BWP is The number of RBs 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 pre-specified by a protocol. The above formula can also be expressed as follows:

[0129]

[0130]

[0131]

[0132]

[0133]

[0134]

[0135] Alternatively, after the dB value of ΔP, denoted as ΔP_dB, is calculated in the above manner, the actual value of ΔP can be calculated as

[0136] Specifically, the above formula can also be written in the following form:

[0137]

[0138] Among them, the subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of REs of the first BWP is The number of REs of the second BWP is

[0139] Specifically, if the number of REs of the first BWP is The number of REs 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 pre-specified by a protocol. The above formula can also be written as:

[0140]

[0141]

[0142]

[0143]

[0144]

[0145]

[0146] Alternatively, after the dB value of ΔP, denoted as ΔP_dB, is calculated in the above manner, the actual value of ΔP can be calculated as

[0147] According to the above formula, the transmission power of the first reference signal can be calculated, and thus the first reference signal can be transmitted within the first BWP.

[0148] In this embodiment, the first BWP is the BWP after switching the BWP, and the second BWP is the BWP before switching the BWP. The first reference signal is transmitted on the first BWP after switching, and the accurate transmission power of the reference signal is determined according to the difference between the bandwidth of the first BWP after switching and the bandwidth of the second BWP before switching, which can ensure that the interference intensity on the PUSCH of the future scheduling measured is accurate.

[0149] Optionally, after receiving the first reference signal, the network device can measure the interference intensity according to the first reference signal, calculate the CQI, and determine the scheduling information.

[0150] Specifically, the scheduling information includes the RB positions and quantities occupied by the BWP, and the MCS levels used (including the modulation order, code rate, and comprehensive spectral efficiency).

[0151] For example, the scheduling information can be used to indicate that the RB numbers occupied by the BWP are 0 - 15, and the MCS order is 20, the corresponding modulation order is 256QAM, the code rate is 0.67, and the comprehensive spectral efficiency is 5.332.

[0152] Specifically, the CQI can be determined according to the measurement result of the first reference signal, and further the scheduling information can be determined. For example, by measuring the first reference signal to obtain SINR = 5dB, calculating to obtain CQI = 5, the MCS order can be obtained as 9, the corresponding modulation order is 16QAM, the code rate is 0.6, and the comprehensive spectral efficiency is 2.4063. Based on the measurement result, the MCS order when scheduling the BWP can be determined as 9, and then the RB quantity is calculated as 24 based on parameters such as the target throughput, SINR value, and power headroom.

[0153] The above calculation of the transmission signal power can be obtained through, but not limited to, the following three methods:

[0154] Method 1: The power value of the transmission signal is obtained by averaging the signal powers of all the REs occupied by the PUSCH on the BWP before switching;

[0155] Method 2: The power value of the transmission signal is obtained by averaging the signal powers of all the REs occupied by the PUSCH - DMRS on the BWP before switching;

[0156] Method 3: The power value of the transmission signal is the power of an RE of a certain PUSCH - DMRS on the BWP before switching.

[0157] Optionally, this embodiment may further include the following steps S403 - S405:

[0158] 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.

[0159] 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.

[0160] Specifically, the second indication information may be sent through signaling or signals such as RRC signaling, DCI, or MAC CE.

[0161] S404: The network device sends third indication information, and the terminal device receives the third indication information, where the third indication information indicates the scheduling information corresponding to the first BWP.

[0162] Specifically, the network device may send third indication information to the terminal device to indicate the scheduling information corresponding to the first BWP, so that the terminal device switches the working BWP to the first BWP.

[0163] Specifically, the third indication information may be sent through signaling or signals such as RRC signaling, DCI, or MAC CE.

[0164] Optionally, the second indication information and the third indication information may be carried and sent in the same signaling or message. 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.

[0165] Specifically, the scheduling information includes the RB positions and quantities occupied by the BWP, as well as the MCS levels used (including modulation order, code rate, and overall spectral efficiency). For example, the scheduling information may be used to indicate that the RB numbers occupied by the BWP are 0 - 15, the MCS order is 20, the corresponding modulation order is 256QAM, the code rate is 0.67, and the overall spectral efficiency is 5.332.

[0166] 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.

[0167] Specifically, after receiving the second indication information and / or the third indication information sent by the network device, the terminal device may send an uplink signal to the network device within the first BWP, that is, the terminal device may send an uplink signal to the network device within the switched working BWP.

[0168] Specifically, the uplink signal may include a Physical Uplink Shared Channel (PUSCH), or a Physical Uplink Control Channel (PUCCH), or a Sounding Reference Signal (SRS), or other types of uplink signals such as channels / signals / reference signals not defined in the current protocol. The uplink signal may also be referred to as uplink data, uplink control information, or uplink reference signal.

[0169] Optionally, before step S401, this embodiment may further include the step of: the terminal device sending an uplink signal within the second BWP. That is, before switching the BWP, the terminal device sends an uplink signal within the second BWP.

[0170] The solution of the embodiment of the present application transmits a reference signal on the switched BWP, and determines the accurate transmission power of the reference signal according to the difference between the bandwidth of the switched BWP and the bandwidth of the pre-switched BWP. For the problem that the frequency-domain position and power of the reference signal are inaccurate when the signal bandwidth is switched, resulting in inaccurate uplink CQI measurement, by transmitting the reference signal on the currently scheduled BWP and adjusting the transmission power of the reference signal according to the configuration of the switched BWP and the configuration of the current BWP, the effect of improving the CQI measurement accuracy and the uplink throughput is achieved.

[0171] The following combines Figure 6 to introduce another embodiment of the present invention.

[0172] Figure 6 Another signal transmission method provided by the present invention includes the following steps:

[0173] S601: The network device sends first indication information to the terminal device, and the terminal device obtains the first indication information. The first indication information is used to indicate the frequency-domain resources occupied by at least one first uplink signal.

[0174] Specifically, the first uplink signal may be SRS / CQI-RS, DMRS+PUSCH, Front-load+AdditionalDMRS+PUSCH, PUCCH Format 0 / MsgA (PUSCH without DMRS), PUCCH Format 1, PUCCH Format 2, PUCCH Format 3.

[0175] Specifically, the first uplink signal may be used to measure interference signals, such as measuring the interference intensity of signals in neighboring cells. Then, the calculation result can be used to calculate the Signal-to-Interference-plus-Noise Ratio (SINR) to obtain the uplink Channel Quality Indicator (CQI). For example, if SINR=-10dB is obtained by measuring the reference signal, the corresponding CQI=3 can be calculated.

[0176] In some embodiments, the first indication information may be sent via RRC signaling, or DCI, or MAC CE, or other signaling or signals.

[0177] S602: The terminal device sends at least one first uplink signal within a first BWP, and the network device receives at least one first uplink signal.

[0178] S603: The terminal device sends at least one second uplink signal within a second BWP, and the network device receives at least one first uplink signal.

[0179] 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.

[0180] Optionally, the terminal device receives configuration information, which includes the number of subcarriers and / or subcarrier spacing of the first BWP.

[0181] Specifically, the BWP may also be referred to as the signal bandwidth, and the BWP may also be other defined signal bandwidths.

[0182] Specifically, the system parameters refer to the subcarrier spacing and the CP length. For example, the configuration information may indicate that the subcarrier spacing of the first BWP is 60 kHz and the Extended CP is used, or indicate that the subcarrier spacing of the first BWP is 30 kHz and the Normal CP is used.

[0183] Optionally, the configuration information may be used to configure a signal bandwidth candidate set for the terminal device. Taking the signal bandwidth as the BWP as an example, the network device may configure a BWP candidate set for the terminal device in advance through the configuration information. The BWP candidate set may include multiple BWPs available to the terminal device and the number of resource blocks RB and / or subcarrier spacing corresponding to the multiple BWPs.

[0184] Optionally, the configuration information may be carried in the first indication information, or carried in the same signaling as the first indication information.

[0185] For example, the BWP candidate set may include BWP1 and BWP2, where BWP1 includes RB numbers 0 - 23 and BWP2 includes RB numbers 16 - 31. Or, BWP1 includes RB numbers 0 - 31, 64 - 127, and BWP2 includes RB numbers 30 - 63, 126 - 255.

[0186] Specifically, the start time of the time domain symbol for sending the at least one first uplink signal is not later than the start time of the time domain symbol for sending the at least one second uplink signal. It can be understood that the first uplink signal is earlier than the second uplink signal in the time dimension.

[0187] Specifically, the frequency-domain resources of the first BWP and the second BWP are different.

[0188] In some embodiments, the number of subcarriers and / or the subcarrier spacing of the first BWP and the second BWP may be included in the number of subcarriers and / or the subcarrier spacing of one or more BWPs indicated by the configuration information. For example, the configuration information may indicate that the first BWP includes 32 RBs, the subcarrier spacing is 60 kHz, and Extended CP is used, 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 configuration information may indicate that the first BWP includes 32 RBs, the subcarrier spacing is 60 kHz, and Extended CP is used, while indicating that the second BWP includes 64 RBs, the subcarrier spacing is 30 kHz, and Normal CP is used.

[0189] Specifically, the difference between the first BWP and the second BWP can be understood as that the first BWP and the second BWP do not overlap or partially overlap, or the frequency-domain units (REs) corresponding to the first BWP and the second BWP are not the same or partially the same.

[0190] For example, if the RB numbers included in BWP1 are 0 - 23 and the RB numbers included in BWP2 are 16 - 31, then BWP1 and BWP2 are different.

[0191] For another example, if the RB numbers included in BWP1 are 0 - 31, 64 - 127 and the RB numbers included in BWP2 are 30 - 63, 126 - 255, then BWP1 and BWP2 are different.

[0192] For another example, if the RB numbers included in BWP1 are 0 - 12 and the RB numbers included in BWP2 are 0 - 11, then BWP1 and BWP2 are different.

[0193] For another example, if the RE numbers included in BWP1 are 0 - 255 and the RE numbers included in BWP2 are 0 - 254, then BWP1 and BWP2 are different.

[0194] Specifically, the second BWP may be the BWP currently used by the terminal device.

[0195] Specifically, the second uplink signal may be SRS / CQI-RS, DMRS+PUSCH, Front-load+AdditionalDMRS+PUSCH, PUCCH Format 0 / MsgA (PUSCH without DMRS), PUCCH Format 1, PUCCH Format 2, PUCCH Format 3. The second uplink signal may also be signals such as uplink data.

[0196] Specifically, the transmission 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 transmission power of the first uplink signal can be calculated according to 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.

[0197] In some embodiments, the first uplink signal may be a first reference signal.

[0198] Below, taking the first uplink signal as the first reference signal as an example, how to calculate the transmission power of the first reference signal will be introduced.

[0199] The transmission power of the first reference signal is P1, the transmission power of the second reference signal is P2, the difference between the transmission power of the first reference signal and the transmission power of the second reference signal is ΔP, ΔP = P1 - P2, the first reference signal is the reference signal transmitted on the first BWP, and the second reference signal is the reference signal transmitted on the second BWP.

[0200] Specifically, the difference ΔP between the transmission power of the first reference signal and the transmission power of the second reference signal satisfies the formula:

[0201]

[0202] Among them, the subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of RBs of the first BWP is The number of RBs of the second BWP is

[0203] Specifically, if the number of RBs of the first BWP is The number of RBs 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 pre-specified by a protocol, and the above formula can also be expressed as follows:

[0204]

[0205]

[0206]

[0207]

[0208]

[0209]

[0210] Alternatively, after calculating the dB number of ΔP as ΔP_dB in the above manner, the actual value of ΔP can be calculated as

[0211] Specifically, the above formula can also be written in the following form:

[0212]

[0213] Wherein, the subcarrier spacing of the first BWP is Δf1, and the subcarrier spacing of the second BWP is Δf2. The number of REs of the first BWP is The number of REs of the second BWP is

[0214] Specifically, if the number of REs of the first BWP is The number of REs 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, and the above formula can also be written as:

[0215]

[0216]

[0217]

[0218]

[0219]

[0220]

[0221] Alternatively, after calculating the dB number of ΔP as ΔP_dB in the above manner, the actual value of ΔP can be calculated as

[0222] According to the above formula, the transmission power of the first reference signal can be calculated, so as to transmit the first reference signal within the first BWP.

[0223] Optionally, after receiving the first reference signal, the network device can measure the interference intensity according to the first reference signal, calculate the CQI, and determine the scheduling information.

[0224] Specifically, the scheduling information includes the RB positions and quantities occupied by the BWP, and the MCS levels used (including modulation order, code rate, and combined spectral efficiency).

[0225] For example, the scheduling information can be used to indicate that the RB numbers occupied by the BWP are 0 - 15, the MCS order is 20, the corresponding modulation order is 256QAM, the code rate is 0.67, and the combined spectral efficiency is 5.332.

[0226] Specifically, the CQI can be determined according to the measurement result of the first reference signal, and further the scheduling information can be determined. For example, by measuring the first reference signal, SINR = 5dB is obtained, CQI = 5 is calculated, the MCS order is 9, the corresponding modulation order is 16QAM, the code rate is 0.6, and the combined spectral efficiency is 2.4063. Based on the measurement result, the MCS order for scheduling the BWP can be determined to be 9, and then the number of RBs is calculated to be 24 based on parameters such as the target throughput, SINR value, and power headroom.

[0227] The above calculation of the transmit signal power can be obtained through, but not limited to, the following three methods:

[0228] Method 1: The power value of the transmit signal is obtained by averaging the signal powers of all the REs occupied by the PUSCH on the BWP before handover;

[0229] Method 2: The power value of the transmit signal is obtained by averaging the signal powers of all the REs occupied by the PUSCH - DMRS on the BWP before handover;

[0230] Method 3: The power value of the transmit signal is the power of a certain RE of the PUSCH - DMRS on the BWP before handover.

[0231] As Figure 7a shown, after the terminal device receives the first indication information, it can send a first uplink signal to the network device, and the frequency - domain resources of the first uplink signal are within the first BWP. Subsequently, the terminal device sends a second uplink signal to the network device, and the frequency - domain resources of the second uplink signal are within the second BWP. The frequency - domain resources of the first BWP and the second BWP are different. The first BWP is the BWP after handover of the BWP, and the second BWP is the BWP before handover of the BWP. Again, as Figure 7b shown, the first uplink signal can be sent in a frequency - hopping manner.

[0232] Figure 8 shows the time - frequency resource distribution of different first uplink signals. The horizontal direction is the time domain direction, and the vertical direction is the frequency domain direction. Among them, the time - frequency resources of the first uplink signal can be configured and distributed in the following several situations:

[0233] (1) Reference signal. For example Figure 8a the time - frequency resource distribution of the reference signal. The reference signal can be signals such as DMRS, SRS, and channel quality measurement signal CQI - RS;

[0234] (2) Reference signal + data signal / control signal. For example Figure 8b 、 Figure 8c 、 Figure 8d 、 Figure 8e and Figure 8f the time-frequency resource distribution of the reference signal + data signal / control signal in. The reference signal can be signals such as SRS, channel quality measurement signal CQI-RS, 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 signals such as PUCCH Format 1 signal, PUCCH Format 2, PUCCH Format 3, etc.

[0235] (3) Data signal / control signal. For example Figure 8f the time-frequency resource distribution of the data signal / control signal in, the data signal / control signal can be a PUSCH signal or a PUCCH signal. The PUCCH signal can be signals such as PUCCH Format 0 signal, etc. The PUSCH signal can be signals such as MsgA, etc.

[0236] Optionally, this embodiment may further include the following steps S604 - S606:

[0237] S604: The network device sends second indication information, and the terminal device receives the second indication information. The second indication information indicates the frequency-domain resources occupied by the first BWP.

[0238] 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.

[0239] Specifically, the second indication information may be sent through signaling or signals such as RRC signaling, or DCI, or MAC CE.

[0240] S605: The network device sends third indication information, and the terminal device receives the third indication information. The third indication information indicates the scheduling information of the third uplink signal.

[0241] Specifically, the network device may send third indication information to the terminal device to indicate the scheduling information corresponding to the first BWP, so that the terminal device switches the working BWP to the first BWP.

[0242] Specifically, the third indication information may be sent through signaling or signals such as RRC signaling, or DCI, or MAC CE.

[0243] Optionally, the second indication information and the third indication information may be carried and sent in the same signaling or message. 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.

[0244] Specifically, the scheduling information includes the RB positions and quantities occupied by the BWP, and the MCS levels used (including modulation order, code rate, and comprehensive spectral efficiency). For example, the scheduling information may be used to indicate that the RB numbers occupied by the BWP are 0-15, and the MCS order is 20, the corresponding modulation order is 256QAM, the code rate is 0.67, and the comprehensive spectral efficiency is 5.332.

[0245] 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.

[0246] Specifically, after receiving the second indication information and / or the third indication information sent by the network device, the terminal device may send a third uplink signal to the network device within the first BWP, that is, the terminal device may send a third uplink signal to the network device within the switched working BWP.

[0247] Specifically, the third uplink signal may include an uplink shared physical channel PUSCH, or an uplink control physical channel PUCCH, or 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.

[0248] As Figure 7a and Figure 7b shown, after receiving the second indication information, the terminal device may send a third uplink signal on the first BWP (i.e., the switched BWP).

[0249] The solution of the embodiment of the present application sends the first uplink signal on a BWP different from the BWP before handover. By measuring the first uplink signal, the network device can more accurately estimate the uplink channel quality, thereby determining more accurate uplink scheduling information (e.g., MCS level), and improving the uplink throughput.

[0250] It can be understood that in each of the above embodiments, the methods and / or steps implemented by the network device may also be implemented by components (such as chips or circuits) available for the network device. The methods and / or steps implemented by the terminal device may also be implemented by components (such as chips or circuits) available for the terminal device. The methods and / or steps implemented by the core network device may also be implemented by components (such as chips or circuits) available for the core network device.

[0251] The above mainly introduces the solution provided by the embodiments of the present application from the perspective of the interaction between various devices. Correspondingly, the embodiments of the present application also provide a communication device, which is used to implement the above various methods. The communication device can be the network device in the above method embodiments, or a device including the above network device, or a component applicable to the network device. Or, the communication device can be the terminal device in the above method embodiments, or a device including the above terminal device, or a component applicable to the terminal device. Or, the communication device can be the core network device in the above method embodiments, or a device including the above core network device, or a component applicable to the core network device. It can be understood that, in order to implement the above functions, the communication device includes the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0252] The embodiments of the present application can divide functional modules according to the above method embodiments for the communication device. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0253] It can be understood that, in order to implement the functions in the above embodiments, the terminal and the network device include the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combining the units and method steps of each example described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0254] Figures 9 - 12 It is a schematic structural diagram of a possible communication device provided by the 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, and thus can also achieve the beneficial effects possessed by the above method embodiments.

[0255] Such as Figure 9As shown in the figure, it is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device 1300 includes a transceiver unit 1301 and a processing unit 1302.

[0256] When the communication device 1300 is used to implement the functions of the terminal device in the method embodiment as Figure 4 shown, the transceiver unit 1301 is used to perform the operations of the terminal device in the embodiment as Figure 4 shown.

[0257] When the communication device 1300 is used to implement the functions of the terminal device in the method embodiment as Figure 6 shown, the transceiver unit 1301 is used to perform the operations of the terminal device in the embodiment as Figure 6 shown.

[0258] When the communication device 1300 is used to implement the functions of the network device in the method embodiment as Figure 4 shown, the transceiver unit 1301 is used to perform the operations of the network device in the embodiment as Figure 4 shown.

[0259] When the communication device 1300 is used to implement the functions of the network device in the method embodiment as Figure 6 shown, the transceiver unit 1301 is used to perform the operations of the network device in the embodiment as Figure 6 shown.

[0260] Figure 10 A simplified schematic structural diagram of a terminal device is shown. For ease of understanding and for convenience of illustration, Figure 10 in the figure, a mobile phone is taken as an example of the terminal. As Figure 10 shown, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input / output device. The processor is mainly used for processing communication protocols and communication data, and for controlling the terminal, executing software programs, processing data of software programs, etc. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for the conversion between baseband signals and radio frequency signals and for the processing of radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by the user and for outputting data to the user. Exemplarily, some types of terminal devices may not have an input / output device.

[0261] When sending data, after the processor performs baseband processing on the data to be sent, it outputs a baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency 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, Figure 10 only one memory and one processor are shown. In an actual terminal device product, 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. The embodiments of the present application do not limit this.

[0262] In the embodiments of the present application, the antenna and the radio frequency circuit with transceiver functions can be regarded as the receiving unit and the sending unit of the terminal device (which can also be collectively referred to as the transceiver unit), and the processor with processing functions can be regarded as the processing unit of the terminal. As Figure 10 shown, the terminal includes a transceiver unit 1401 and a processing unit 1402. The transceiver unit 1401 may also be referred to as a receiver / transmitter, a transceiver, a receiving / sending circuit, etc. The processing unit 1402 may also be referred to as a processor, a processing board, a processing module, a processing device, etc. The transceiver unit 1401 is used to implement Figure 9 the functions of the transceiver unit 1301 in the embodiments shown; the processing unit 1402 is used to implement Figure 9 the functions of the processing unit 1302 in the embodiments shown.

[0263] Figure 11 shows a schematic structural diagram of a simplified network device. The network device includes a radio frequency signal transceiver and conversion part and a part 1502. The radio frequency signal transceiver and conversion part further includes a transceiver unit 1501 part. The radio frequency signal transceiver and conversion part is mainly used for the transceiver of radio frequency signals and the conversion between radio frequency signals and baseband signals; the part 1502 is mainly used for baseband processing and controlling the network device, etc. The transceiver unit 1501 may also be referred to as a receiver / transmitter, a transceiver, a receiving / sending circuit, etc. The part 1502 is usually the control center of the network device and is usually referred to as the processing unit, which is used to control the network device to execute the above Figure 4 or Figure 6 steps regarding the network device. For details, please refer to the description in the relevant parts above. The transceiver unit 1501 can be used to implement Figure 9 the functions of the transceiver unit 1301 in the embodiments shown, and the part 1502 is used to implement Figure 9 the functions of the processing unit 1302 in the embodiments shown.

[0264] The 1502 part may include one or more single boards, and each single board may include one or more processors and one or more memories. The processor is used to read and execute the programs in the memory to implement baseband processing functions and control of the network device. If there are multiple single boards, they can be interconnected to increase processing power. As an alternative implementation, it can also be that multiple single boards share one or more processors, or multiple single boards share one or more memories, or multiple single boards simultaneously share one or more processors.

[0265] As Figure 12 shown, it is a schematic structural diagram of another communication device provided by 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 can be understood that the interface circuit 1602 can be a transceiver or an input / output interface. Optionally, the communication device 1600 may further include a memory 1603, which is used to store the instructions executed by the processor 1601 or the input data for the processor 1601 to run the instructions or the data generated after the processor 1601 runs the instructions.

[0266] When the communication device 1600 is used to implement Figure 4 or Figure 6 the method shown, the processor 1601 is used to implement the functions of the above-mentioned processing unit 1302, and the interface circuit 1602 is used to implement the functions of the above-mentioned transceiver unit 1301.

[0267] When the above communication device is a chip applied to a terminal device, the chip is used to implement the functions of the terminal device in the above method embodiment. The chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and this information is sent by a network device or other devices to the terminal device; or, the chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, and this information is sent by the terminal device to a network device or other devices.

[0268] When the above communication device is a chip applied to a network device, the chip is used to implement the functions of the network device in the above method embodiment. The chip receives information from other modules (such as a radio frequency module or an antenna) in the network device, and this information is sent by a terminal or other devices to the network device; or, the chip sends information to other modules (such as a radio frequency module or an antenna) in the network device, and this information is sent by the network device to a terminal device or other devices.

[0269] It can be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), 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.

[0270] The method steps in the embodiments of the present application may be implemented in a hardware manner or by a processor executing software instructions. The software instructions may be composed of corresponding software modules, and the software modules may be stored in a random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, removable hard disks, compact disc read-only memories (CD-ROMs), 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 may also be a component of the processor. The processor and the storage medium may be located in the ASIC. Additionally, the ASIC may be located in the first node. Of course, the processor and the storage medium may also exist as discrete components in the terminal device.

[0271] The embodiments of the present application further provide a communication system, including the above-mentioned communication device.

[0272] The embodiments of the present application further provide a computer-readable storage medium, on which a computer program or instruction is stored. When the program or instruction is executed by a processor, the method described in the above embodiments is executed.

[0273] The embodiments of the present application further provide a computer program product, which, when executed on a computing device, causes the method described in the above embodiments to be executed.

[0274] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can 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 can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive.

[0275] In various embodiments of the present application, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0276] In the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. In the text description of the present application, the character " / " generally represents an "or" relationship between the associated objects before and after; in the formulas of the present application, the character " / " represents a "division" relationship between the associated objects before and after.

[0277] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The magnitude of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal 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; Sending at least one first uplink signal within a first BWP; 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 not 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 second BWP are different.

2. The method according to claim 1, wherein 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.

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

4. The method according to any one of claims 1-3, 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, 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, characterized in that, The method further includes: According to the scheduling information, sending the third uplink signal within the first BWP.

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

8. The method according to any one of claims 1-7, characterized in that 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, ΔP = P1 - P2.

9. The method according to claim 8, characterized in that The difference ΔP between the transmit power of the first uplink signal and the transmit 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 is 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: Sending 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 second BWP are different.

12. The method according to claim 11, wherein 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.

13. The method according to claim 12, 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.

14. The method according to any one of claims 11-13, the method further includes: Send 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, the method further comprising: Send third indication information, where the third indication information indicates the scheduling information of a third uplink signal.

16. The method according to claim 15, characterized in that, The method further comprises: Receive 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, 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.

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 comprises: 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 comprises: 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 comprises 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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