Communication method and device

Abstract

The invention provides a communication method and device. The method comprises the following steps: acquiring ephemeris information, determining dynamic authorization-free uplink transmission configuration information through a first corresponding relation according to the ephemeris information, and performing uplink transmission according to the uplink configuration information. Therefore, the terminal device can determine the dynamic grant-free uplink transmission configuration information according to the ephemeris information and the first corresponding relationship, thereby avoiding the failure of the pre-configured dynamic grant-free uplink transmission configuration, improving the performance of the dynamic grant-free uplink transmission in a non-ground network, and not increasing the configuration frequency.

Description

Communication method and device Technical Field

[0001] The present application relates to the field of mobile communication technologies, and in particular to a communication method and device. Background Art

[0002] Non-terrestrial networks (NTNs) are a crucial component of fifth-generation (5G) wireless communication networks and beyond. They are defined as networks or network segments that use transmission equipment, such as airborne or spaceborne vehicles, as relay nodes or base stations. Compared to traditional terrestrial networks, the most distinctive feature of non-terrestrial networks is that base stations are deployed in the air or space, or that base stations transmit signals to terminal devices via non-terrestrial equipment in the air or space.

[0003] Non-terrestrial networks feature wide coverage, long distances, and high latency. Scheduling or dynamic authorization-based service transmission methods struggle to meet service latency requirements. Therefore, grant-free (GF) transmission will be a common transmission solution for minimizing transmission latency in future non-terrestrial networks. In GF transmission, terminal devices do not need to obtain the time-frequency resource configuration and transmission parameters for uplink transmission by monitoring the base station's dynamic authorization. Instead, they use pre-configured GF transmission time-frequency resources and transmission parameters to send data to the base station.

[0004] Currently, GF transmission parameters in non-terrestrial networks are primarily configured by network equipment to terminal devices via radio resource control (RRC) signaling. However, due to the high mobility of non-terrestrial devices in non-terrestrial networks and the long transmission distances between terminal devices and non-terrestrial devices, pre-configured GF transmission parameters are difficult to maintain in the long term, resulting in reduced GF transmission performance.

[0005] Summary of the Invention

[0006] The present application provides a communication method and apparatus for improving the performance of GF transmission in a non-terrestrial network.

[0007] In a first aspect, the present application provides a communication method for use in a non-terrestrial network communication system. The method can be implemented by a terminal device. The terminal device can be a terminal device or a component within the terminal device. The component herein may include, for example, at least one of a chip, a chip system, a processor, a transceiver, a processing unit, or a transceiver unit. Taking the terminal device as an example, the method can be implemented by the following steps: the terminal device obtains ephemeris information; the terminal device can also determine, based on the ephemeris information and a first correspondence, uplink transmission configuration information exempting from dynamic authorization, and perform uplink transmission based on the uplink configuration information.

[0008] Based on the method shown in the first aspect, the terminal device can determine the dynamic authorization-free uplink transmission configuration information according to the ephemeris information and the first corresponding relationship, that is, determine the configuration adopted for the dynamic authorization-free uplink transmission, thereby avoiding the invalidation of the pre-configured dynamic authorization-free uplink transmission configuration, and does not require the network equipment to increase the configuration frequency, which can improve the performance of the dynamic authorization-free uplink transmission in the non-terrestrial network.

[0009] In one possible implementation, the terminal device can determine the non-ground equipment information based on the ephemeris information, and the non-ground equipment information includes distance information and / or time information, wherein the distance information is used to indicate the distance between the terminal performing uplink transmission and the non-ground equipment, and the time information is determined based on the uplink transmission time and reference time information, and the reference time information is included in the ephemeris information; the terminal device can also determine the dynamic authorization-free uplink transmission configuration information based on the non-ground equipment information through a first corresponding relationship.

[0010] Based on this implementation method, the terminal device can determine the distance information and / or time information according to the ephemeris information, and determine the dynamic authorization-free uplink transmission configuration information based on the distance information and / or time information, as well as based on the first corresponding relationship, thereby realizing flexible determination of the dynamic authorization-free uplink transmission configuration information.

[0011] In a possible implementation, the non-terrestrial device information includes the distance information, and the terminal device can query the first corresponding relationship according to the distance information to determine the dynamic authorization-free uplink transmission configuration information.

[0012] Based on this implementation, the first correspondence may include a correspondence between distance information and dynamic authorization-free uplink transmission configuration information. Optionally, for different distance information, the dynamic authorization-free uplink transmission configuration information determined according to the first correspondence may be different to adapt to dynamic authorization-free transmission requirements at different distances.

[0013] In a possible implementation, the non-terrestrial equipment information includes the time information, and the terminal device can query the first correspondence according to the service beam information and the time information to determine the dynamic authorization-free uplink transmission configuration information.

[0014] Based on this implementation, the first correspondence may include a correspondence between beam information, time information, and dynamic authorization-free uplink transmission configuration information. Optionally, for the same beam information and different time information, the dynamic authorization-free uplink transmission configuration information determined according to the first correspondence may be different to adapt to the dynamic authorization-free transmission requirements under different beam information and time information.

[0015] In a possible implementation manner, the terminal device may further receive the first corresponding relationship from a network device.

[0016] Based on this implementation, the first correspondence relationship may be configured from the network device to the terminal apparatus, wherein the network device may include non-ground equipment or a ground station to achieve flexible configuration.

[0017] In one possible implementation, the dynamic authorization-free uplink transmission configuration information includes at least one of the following: time-frequency resource location information; modulation and coding scheme; number of repeated transmissions; power control parameters; precoding scheme information; uplink transmission waveform information; access scheme parameters corresponding to uplink transmission; preamble signal sequence parameters; time-frequency resource information of the preamble sequence; root sequence information of the preamble signal; subcarrier spacing; reference signal receiving power threshold; timing advance configuration; and time configuration of its timer.

[0018] Based on this implementation, flexible configuration of uplink transmission configuration information without dynamic authorization can be achieved. Optionally, the uplink transmission configuration information without dynamic authorization can include transmission parameters for dynamic authorization-free uplink transmission during random access, direct data transmission without dynamic authorization, and / or small packet transmission, etc., to accommodate various communication scenarios.

[0019] In a second aspect, a communication device is provided, which can implement the method in any possible implementation of the first aspect.

[0020] In an optional implementation, the device may include a module that performs the methods / operations / steps / actions described in the first aspect and any possible implementation above. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In an optional implementation, the device includes a processing unit (sometimes also referred to as a processing module) and a communication unit (sometimes also referred to as a communication module, a transceiver module, or a transceiver unit). The communication unit is capable of implementing a sending function and a receiving function. When the communication unit implements the sending function, it may be referred to as a sending unit (sometimes also referred to as a sending module). When the communication unit implements the receiving function, it may be referred to as a receiving unit (sometimes also referred to as a receiving module). The sending unit and the receiving unit may be the same functional module, which is capable of implementing a sending function and a receiving function; or, the sending unit and the receiving unit may be different functional modules, and the transceiver unit is a general term for these functional modules.

[0021] Exemplarily, when implementing the method described in the first aspect, the apparatus may include a processing unit and a communication unit. The processing unit may be configured to obtain ephemeris information and, based on the ephemeris information and a first correspondence, determine dynamic authorization-free uplink transmission configuration information. The communication unit may be configured to perform uplink transmission based on the uplink configuration information.

[0022] In one possible implementation, the processing unit can be specifically used to determine non-ground device information based on the ephemeris information, the non-ground device information including distance information and / or time information, wherein the distance information is used to indicate the distance between the terminal performing uplink transmission and the non-ground device, the time information is determined based on the uplink transmission time and reference time information, and the reference time information is included in the ephemeris information; and, is used to determine the dynamic authorization-free uplink transmission configuration information based on the non-ground device information through a first corresponding relationship.

[0023] In a possible implementation, the non-terrestrial device information includes the distance information, and the processing unit may be specifically configured to query the first corresponding relationship according to the distance information to determine the dynamic authorization-free uplink transmission configuration information.

[0024] In a possible implementation, the non-terrestrial device information includes the time information, and the processing unit can be specifically used to determine the dynamic authorization-free uplink transmission configuration information by querying a first correspondence based on the service beam information and the time information.

[0025] In a possible implementation manner, the communication unit may be further configured to receive the first corresponding relationship from a network device.

[0026] In one possible implementation, the dynamic authorization-free uplink transmission configuration information includes at least one of the following: time-frequency resource location information; modulation and coding scheme; number of repeated transmissions; power control parameters; precoding scheme information; uplink transmission waveform information; access scheme parameters corresponding to uplink transmission; preamble signal sequence parameters; time-frequency resource information of the preamble sequence; root sequence information of the preamble signal; subcarrier spacing; reference signal receiving power threshold; timing advance configuration; time configuration of its timer for time-frequency resource location information; modulation and coding scheme; number of repeated transmissions; power control scheme information; power control parameters; precoding scheme information; uplink transmission waveform information; access scheme information corresponding to uplink transmission; access parameters corresponding to uplink transmission.

[0027] For another example, the apparatus includes a processor coupled to a memory, configured to execute instructions in the memory to implement the method described in the first aspect and any possible implementations. Optionally, the apparatus also includes other components, such as an antenna, an input / output module, a transceiver, a communication interface, and the like. These components may be hardware, software, or a combination of software and hardware.

[0028] In a third aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium is used to store a computer program or instruction, which, when executed, enables the method of any possible implementation manner in the first aspect to be implemented.

[0029] According to a fourth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the method of any possible implementation manner in the first aspect to be implemented.

[0030] In a fifth aspect, a chip system is provided, which includes a logic circuit (or it can be understood that the chip system includes a processor, and the processor may include a logic circuit, etc.), and may also include an input and output interface. The input and output interface can be used to receive messages, and may also be used to send messages. The input and output interfaces may be the same interface, that is, the same interface can implement both the sending function and the receiving function; or, the input and output interfaces include an input interface and an output interface, the input interface is used to implement the receiving function, that is, for receiving messages; the output interface is used to implement the sending function, that is, for sending messages. The logic circuit can be used to perform operations other than the sending and receiving functions in the above-mentioned first aspect and any possible implementation thereof; the logic circuit can also be used to transmit messages to the input and output interface, or receive messages from other communication devices from the input and output interface. The chip system can be used to implement the method of any possible implementation of the first aspect above. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0031] Optionally, the chip system may further include a memory, which may be used to store instructions, and the logic circuit may call the instructions stored in the memory to implement corresponding functions.

[0032] In a sixth aspect, a communication system is provided, which may include a terminal device and a network device, wherein the terminal device may be used to execute the method in the first aspect and any possible implementation thereof.

[0033] The technical effects brought about by the above second to sixth aspects can be found in the description of the above first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic diagram of the architecture of a wireless communication system provided in an embodiment of the present application;

[0035] FIG2 is a schematic diagram of the architecture of another wireless communication system provided in an embodiment of the present application;

[0036] FIG3 is a schematic diagram of the architecture of a network device provided in an embodiment of the present application;

[0037] FIG4 is a schematic diagram of a CG configuration process based on an NTN network;

[0038] FIG5 is a flow chart of a communication method provided in an embodiment of the present application;

[0039] FIG6A is a schematic diagram of spatial parameters of a satellite system;

[0040] FIG6B is a schematic diagram of a scenario in which GF uplink transmission configuration information is determined based on distance according to an embodiment of the present application;

[0041] FIG7A is a schematic diagram of RTT variation trend during satellite operation;

[0042] FIG7B is a schematic diagram of the relationship between a satellite beam and a service area provided in an embodiment of the present application;

[0043] FIG8 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0044] FIG9 is a schematic structural diagram of another communication device provided in an embodiment of the present application;

[0045] FIG10 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The present application will be described in further detail below with reference to the accompanying drawings.

[0047] The present application provides a communication method and apparatus for reducing the location verification latency and overhead of a terminal device. The method and apparatus described herein are based on the same technical concept. Since the method and apparatus solve similar problems, the implementation of the apparatus and method can refer to each other, and any repetitions will not be repeated.

[0048] In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0049] In the description of this application, "at least one" means one or more, and "more" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or plural.

[0050] In the description of this application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural. " / " means "or", for example, a / b means a or b.

[0051] In order to more clearly describe the technical solutions of the embodiments of the present application, the communication method and device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0052] The communication method provided in the embodiments of this application can be applied to NTN communication scenarios. NTN communication can include networking using devices such as drones, high altitude platform stations (HAPS), and satellites to provide services such as data transmission and voice communication to terminal devices. In addition, the NTN system can also include other aerial network devices, which are not limited in this application.

[0053] Satellites can be categorized by their altitude, or the height of their orbit, into geostationary Earth orbit (GEO), medium Earth orbit (MEO), and low Earth orbit (LEO). GEO is a geostationary Earth orbit, in which satellites remain stationary relative to Earth. The GEO orbital altitude is typically 35,786 kilometers (km). LEO and MEO are collectively referred to as non-geostationary orbits (NGSO). Satellites in these orbits move at high speeds relative to Earth. LEO's orbital altitude is typically 160 to 2,000 km, while MEO's is 2,000 to 35,786 km. NGSOs are further categorized into geostationary cells (earth moving cells) and geostationary cells (earth fixed cells), depending on whether the satellite's beam moves with it. For an earth moving cell, the cell moves relative to the ground, and the satellite's beam follows the satellite's movement. For an earth fixed cell, the cell remains fixed relative to the ground for a certain period of time. The satellite antenna uses its beamforming capability to keep the beam fixed to a specific area on the ground for a certain period of time. For example, a LEO satellite at an orbital altitude of 600 km can move at speeds of up to 7 kilometers per second (km / s). For a cell with a diameter of 100 km, the satellite's service time is only a few minutes.

[0054] Table 1-1 shows the network parameters for LEO NTN communication.

[0055] Table 1-1

[0056] In NTN communications, NTN equipment can operate in two modes: transparent and regenerative. Based on the NTN equipment's operating mode, NTN communication architectures can be categorized into two types: First, a transparent forwarding architecture, in which NTN equipment can act as relays or amplifiers, performing RF filtering and amplification, regenerating physical layer signals. NTN equipment can be responsible for Layer 1 (L1) relaying, performing physical layer forwarding, and is invisible to higher layers. Second, a regenerative architecture, in which NTN equipment performs the processing functions of access network equipment. For example, satellites operating in regenerative mode can be categorized as regenerative satellites without inter-satellite links (ISLs) between satellites; regenerative satellites with ISLs, in which satellites have interfaces for direct data exchange, where the ISLs are Xn ports; or regenerative satellites with the processing functions of distributed units (DUs) of access network equipment, in which case the satellites act as DUs.

[0057] For example, Figure 1 shows a schematic diagram of an NTN scenario applicable to an embodiment of the present application. This NTN scenario can be an application scenario of a transparent forwarding architecture. In the scenario shown in Figure 1, a terminal device can communicate with the 5G core network (CN) through the access network, and then connect to the data network (DN) through the 5G CN. Satellites and NTN gateways can serve as relay devices between terminal devices and access network devices or as remote radio units (RRUs) of access network devices.

[0058] For example, Figure 2 illustrates another NTN scenario applicable to embodiments of the present application. This NTN scenario can be an application scenario of a regenerative architecture. In the scenario shown in Figure 2, a satellite can serve as an access network device, forming an access network with an NTN gateway and communicating with the core network through the NTN gateway. Furthermore, the satellite can provide wireless access services to terminal devices. Figure 2 exemplifies a regenerative satellite architecture without intersatellite links.

[0059] It should be noted that Figures 1 and 2 illustrate only one satellite and one NTN gateway. In actual use, an architecture with multiple satellites and / or multiple NTN gateways may be employed as needed. Each satellite may provide services to one or more terminal devices, each NTN gateway may correspond to one or more satellites, and each satellite may correspond to one or more NTN gateways, although this embodiment of the present application does not specifically limit this.

[0060] It should be noted that FIG. 1 and FIG. 2 are merely examples of NTN scenarios. NTN scenarios may also include other specific scenarios, which are not limited in this application.

[0061] The devices involved in the embodiments of the present application include terminal devices, access network devices, and core network devices.

[0062] A terminal device, also known as user equipment (UE), mobile station (MS), or mobile terminal (MT), refers to a device that provides voice and / or data connectivity to users. For example, a terminal device can be a handheld device or vehicle-mounted device with wireless connectivity. Currently, some examples of terminal devices include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving cars, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes.

[0063] Access network equipment refers to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. It can also be called a base station. Examples of RAN nodes include: gNB, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home evolved Node B (HNB), base band unit (BBU), or wireless fidelity (Wi-Fi) access point (AP).

[0064] In one network architecture, access network equipment may include centralized unit (CU) nodes, DU nodes, or RAN equipment including CU and DU nodes. The RAN equipment including CU and DU nodes splits the protocol layers of the gNB in ​​the NR system, centrally controlling some protocol layer functions within the CU and distributing some or all of the remaining protocol layer functions within the DU, which is then centrally controlled by the CU, as shown in Figure 3. Furthermore, the CU can be divided into a control plane (CU-CP) and a user plane (CU-UP). The CU-CP is responsible for control plane functions, primarily including radio resource control (RRC) and the control plane's corresponding packet data convergence protocol (PDCP) (i.e., PDCP-C). PDCP-C is primarily responsible for encryption, decryption, integrity protection, and data transmission of control plane data. The CU-UP is responsible for user plane functions, primarily including the service data adaptation protocol (SDAP) and the user plane's corresponding PDCP (i.e., PDCP-U). SDAP is primarily responsible for processing core network data and mapping flows to bearers. The PDCP-U is primarily responsible for data plane encryption and decryption, integrity protection, header compression, sequence number maintenance, and data transmission. The CU-CP and CU-UP are connected via the E1 interface. The CU-CP represents the gNB's connection to the core network via the NG interface and to the DU via the F1 interface control plane (i.e., F1-C). The CU-UP connects to the DU via the F1 interface user plane (i.e., F1-U). Alternatively, the PDCP-C may also reside in the CU-UP.

[0065] It can be understood that in the NTN network, access network equipment can be deployed on satellites or other non-terrestrial equipment, or on the ground.

[0066] Core network equipment refers to equipment in the core network that provides service support for terminal equipment. At present, some examples of core network equipment are: access and mobility management function (AMF) entity, session management function (SMF) entity, user plane function (UPF) entity, etc., which are not listed here one by one. Among them, the AMF entity can be responsible for access management and mobility management of terminal equipment; the SMF entity can be responsible for session management, such as user session establishment, etc.; the UPF entity can be a functional entity of the user plane, mainly responsible for connecting to the external network. It should be noted that the entity in this application can also be referred to as a network element or a functional entity. For example, the AMF entity can also be referred to as an AMF network element or an AMF functional entity. For another example, the SMF entity can also be referred to as an SMF network element or an SMF functional entity, etc.

[0067] In this application, the NTN network supports communication between UEs and non-terrestrial devices, where the non-terrestrial devices can be aircraft or satellites with the processing functions of access network devices in a regeneration architecture, or can be deployed in the air or in the atmosphere as relay nodes or amplifiers with the processing functions of access network devices in a clear forwarding architecture. In the architecture shown in Figure 1 or Figure 2, non-terrestrial devices can include satellites (or aircraft, etc.). In the architecture shown in Figure 1 or Figure 2, satellites, NTN gateways, access network devices, nodes in the 5G CN, and nodes in the DN can be collectively referred to as network devices, and the NTN gateways and access network devices can be collectively referred to as ground stations.

[0068] Since non-terrestrial devices are far away from the ground (or UE), the transmission delay between non-terrestrial devices and UE is large. It is difficult for access network equipment to schedule UE transmission in real time through downlink control information (DCI). Therefore, in NTN communication, the scheduling method based on dynamic authorization is difficult to meet the transmission delay requirements. The transmission method without dynamic authorization has become one of the transmission solutions to reduce transmission delay in NTN communication.

[0069] Transmission without dynamic grant can also be called scheduling-free transmission. Among them, one type of transmission without dynamic grant is to complete uplink data transmission during the random access process, such as the two-step random access (2-step RA) introduced in 5G NR. Another type of transmission without dynamic grant is direct data transmission, for example, including semi-persistent scheduling (SPS) and transmission based on preconfigured uplink resources (PUR) in LTE, and configured grant (CG) transmission in 5G NR. The common feature of these two types of GF transmission is that before uplink transmission, the terminal device does not need to obtain the time-frequency resources and transmission parameters used to send data by monitoring the dynamic authorization of the network device, but uses the preconfigured GF uplink transmission configuration information to send data to the network device. Among them, the GF uplink transmission configuration information (hereinafter referred to as GF transmission parameters or GF parameters, etc.) may include time-frequency resources and transmission parameters for data transmission, which are usually configured by the network device through high-layer signaling such as system information (SI) or terminal-specific (UE-specific) RRC signaling. Furthermore, the difference between these two types of GF transmission lies in that, in 2-step RA, the terminal device also sends a random access preamble to the network device at the same time as sending data. This means that the terminal's data and the random access preamble are included in the same uplink message. The random access preamble is used for uplink synchronization between the terminal and the base station. In direct data transmission, however, the terminal device does not need to send a random access preamble to the network device. Therefore, direct data transmission is more suitable for scenarios where uplink synchronization between the terminal device and the network device has already been completed.

[0070] In addition, the 3rd Generation Partnership Project (3GPP) supports terminal devices to transmit data, such as small packet data, in the RRC idle state or the RRC inactive state, and the corresponding transmission process may be referred to as small data transmission (SDT). GF transmission may include small packet transmission. Among them, in the small packet transmission scenario, the amount of data of the data packet that the terminal device needs to transmit is usually very small, and the amount of signaling bits that the terminal device needs to transmit when entering the RRC connected state from the RRC idle state or the RRC inactive state may even be greater than the amount of data transmitted by the small packet. If the terminal device in the RRC idle state or the RRC inactive state is required to enter the connected state before sending the small packet data, it will cause unnecessary power consumption and signaling overhead. Therefore, supporting the terminal device to directly transmit small packet data in the RRC idle state or the RRC inactive state, rather than transmitting the small packet data after entering the RRC connected state, can significantly reduce signaling overhead and power consumption. For example, small packet transmission includes: instant messages from instant messaging applications (APPs), heartbeat packets or push messages from various APPs, business data from non-smartphones, such as accuracy data from wearable devices (such as heartbeat packets), periodic readings sent by industrial wireless sensor networks, or data from devices such as smart meters.

[0071] In the present application, the GF transmission parameters that may be involved in the GF transmission include the time-frequency resource location information, modulation and coding scheme (MCS), repetition transmission times, power control scheme information, power control parameters, precoding scheme information, uplink transmission waveform information (such as waveform mode and corresponding parameters), uplink transmission corresponding access scheme (such as orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA)) information, uplink transmission corresponding access parameters (such as NOMA codebook, etc.). The following description of the GF transmission parameters will be combined with the method provided in the embodiment of the present application, which will not be expanded here.

[0072] As previously described, in GF transmission, GF transmission parameters are currently configured by network devices to terminal devices via RRC signaling. However, due to the high mobility of non-terrestrial devices in non-terrestrial networks and the long transmission distances between terminal devices and non-terrestrial devices, pre-configured GF transmission parameters are difficult to maintain for a long time, resulting in reduced performance of GF transmission in non-terrestrial networks.

[0073] For example, in an NTN network, non-terrestrial devices generally have the characteristic of fast moving speed. Therefore, it can be considered that the distance between non-terrestrial devices and terminal devices changes relatively fast. Therefore, there is a relatively high timeliness requirement for the transmission parameters between terminal devices and non-terrestrial devices. The following takes the configuration of the number of retransmissions in GF transmission as an example and is described in combination with Figure 4. Among them, the number of retransmissions can be expressed as K (K is a positive integer). During the K transmissions of the terminal device, if the base station has correctly demodulated the data packet when receiving the i-th < K transmission, the base station will send an early termination instruction to the UE to stop the (i + 1)-th to K-th retransmissions of the UE to save transmission overhead.

[0074] As shown in Figure 4, at time t0, the satellite sends CG configuration (CG Para) parameter configurations 1 and 2 to UE1 and UE2 respectively. Among them, the number of retransmissions K indicated by the CG configuration 1 obtained by UE1 is 4, while the number of retransmissions K indicated by the CG configuration 2 obtained by UE2 is 8. Since UE1 is closer to the satellite than UE2 at time t0, UE1 can reduce the overhead by using a smaller number of retransmissions, while UE2 needs to use a larger number of retransmissions to improve communication reliability. However, when UE1 and UE2 perform retransmissions at time t1, UE1 is farther from the satellite than UE2, so UE1 actually needs a larger number of retransmissions to improve communication reliability, while UE2 does not need to use a larger number of retransmissions to ensure transmission reliability. Therefore, there is a waste of resources for UE2, so the configuration of the number of retransmissions does not meet the transmission requirements. That is to say, the parameter CG configurations 1 and 2 at time t0 are not applicable to time t1. If UE1 and UE2 still use the CG configurations at time t0, it will lead to a reduction in communication performance.

[0075] In addition, if the frequency of CG configuration is increased, it will lead to the largest configuration overhead. As shown in Figure 5, for example, if it is changed to configure the CG configuration through DCI, the satellite can configure the CG configuration of UE1 for times t0, t1, and t2 respectively through DCI. For example, the number of retransmissions configured for time t0 is 8, the number of retransmissions configured for time t1 is 4, and the number of retransmissions configured for time t2 is 8 to adapt to the distance (or path loss, such as represented by the signal-to-noise ratio (SNR) or signal to interference plus noise ratio (SINR)) between UE1 and the satellite at times t0, t1, and t2 respectively. However, in this scheme, the satellite needs to send different-time CG configurations to the UE respectively, increasing the signaling overhead and resulting in resource waste.

[0076] In order to improve the communication performance of GF transmission in non-terrestrial network communication, the present application provides a communication method and device. Among them, the method and the device are based on the same concept. Since the principles of solving the problem by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated. The communication method can be performed by a terminal device and a non-terrestrial device (or a non-terrestrial device). Among them, the terminal device can be a terminal device or a component in a terminal device. The non-terrestrial device can be an aircraft or a satellite and other equipment. The non-terrestrial device can have the function of an access network device, or only play a transparent transmission role. The non-terrestrial device can be a component in a non-terrestrial device. In the present application, the component can be at least one of a chip, a chip system, a processor, a transceiver, a processing unit or a transceiver unit. For example, for a terminal device, the component may include a wireless transceiver module, and for an access network device, the component may include a CU or DU, etc.

[0077] See Figure 5, which is a flow chart of a communication method provided by the present application. This diagram describes the method using a terminal device and a non-ground device as the execution entities. The method includes:

[0078] S101: The terminal device obtains ephemeris information.

[0079] In S101, the terminal device may receive ephemeris information from a non-terrestrial device, that is, the ephemeris information may be sent by the non-terrestrial device. In addition, when the terminal device is a chip or other component, it may also receive ephemeris information from other components through a communication interface.

[0080] In this application, ephemeris information may also be referred to as satellite ephemeris. Ephemeris information can be used to describe the position and velocity of a spacecraft. Typically, ephemeris information is formatted as a two-line orbital element (TLE). The TLE data format encodes the orbital element list of an Earth-orbiting object into two rows and 70 columns, defining various parameters such as the time, coordinates, position, and velocity of the object with extremely high accuracy.

[0081] Taking the satellite system shown in FIG6A as an example, if the ephemeris is described using orbital parameters, a decomposable ephemeris (or ephemeris information) includes 7 parameters, as shown in Table 1-2.

[0082] Table 1-2

[0083] Based on the above 7 parameters, the coordinate position of the satellite at any time t can be determined.

[0084] Taking the mean anomaly as an example, the reference time t 0eand the reference position M0, are used to determine the mean anomaly of the non-ground device at time t, which can be expressed as M(t). For example, M(t) satisfies M(t)=M0+n(tt 0e ). Among them, M(t) can be used to calculate the celestial coordinates of the satellite.

[0085] Where n is the average angular velocity of the satellite, which is given by the gravitational constant G and the mass of the Earth M. e and Calculated. For example, n satisfies:

[0086] Based on the reference time and orbit parameters, the terminal device can determine the coordinates of the non-ground device running according to the orbit at any time t.

[0087] Optionally, in the NR protocol, the parameters shown in Table 1-2 are carried to the terminal device via the system information block (SIB) 19. SIB 19 can be used to carry satellite configuration information. 0e It can be indicated by the epoch time (epochTime) field of the NTN configuration (ntn-Config) information in the SIB19 information, and other parameters except those in Table 1-2 are indicated by the orbital field in the celestial position table information-version 17 (ephemerisInfo-r17) in the ntn-Config information in the SIB19 information.

[0088] In addition, if the ephemeris is described in a coordinate system (such as the earth-centered earth-fixed (ECEF) coordinate system), the terminal device can determine the coordinate position of the non-terrestrial device at any time t based on the reference time and coordinate system parameters.

[0089] The coordinate system parameters may be indicated by the position velocity (positionVelocity) field of the celestial position table information (ephemerisInfo) of the ntn-Config information in the SIB19 information.

[0090] S102: The terminal device determines GF uplink transmission configuration information according to the ephemeris information via a first corresponding relationship.

[0091] In the present application, the GF uplink transmission configuration information may include but is not limited to GF uplink transmission parameters in the random access process, GF uplink transmission parameters in direct data transmission, and GF uplink transmission parameters in small packet transmission.

[0092] Exemplarily, the GF uplink transmission configuration information includes at least one of the following:

[0093] (1) Time-frequency resource location information, which may be used to indicate available time-frequency resources for GF uplink transmission by a terminal device. A terminal device performing GF transmission may select (or determine) uplink transmission resources for GF transmission based on the time-frequency resource location information. Optionally, the time-frequency resources may be used for initial transmission and / or repeated transmission.

[0094] (2) Modulation and coding scheme, which can be used to indicate different modulation and coding methods. The modulation and coding scheme can be indicated by an MCS table. For example, the MCS table can contain multiple modulation and coding schemes, and different modulation and coding schemes are distinguished by indexes. Therefore, the modulation and coding scheme can also be indicated by indexes. Exemplarily, the MCS table can contain the index of each modulation and coding scheme and at least one of the following contents: modulation, coding rate, and spectral efficiency. An MCS table can include at least one modulation and coding method information.

[0095] (3) Repeated transmission scheme, including the number of transmissions and the redundancy version parameters for each transmission, which can be used by the terminal device to determine the number of repeated transmissions and the redundancy version used for each transmission.

[0096] (4) Power control scheme information, which can be used to indicate the power control schemes available to the terminal device in GF transmission. The power control schemes can correspond to different power control parameters. For example, the power control parameters may include parameters such as initial power P0 and power control loop (powerControlLoopToUse).

[0097] (5) Precoding scheme information, which can be used to indicate the precoding scheme used in GF transmission. Optionally, different precoding schemes have different coding complexities.

[0098] (6) Uplink transmission waveform information, which can be used to indicate the uplink transmission waveform and / or waveform parameters adopted by the terminal device. Among them, the available waveforms include cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform or discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, or other waveforms that can be used for uplink transmission, such as the uplink waveform newly introduced in the 6G communication system. Among them, for communication scenarios with large path loss, the DFT-S-OFDM waveform has the characteristics of low power and low peak to average power ratio (PAPR); for scenarios with small path loss, the CP-OFDM waveform has higher detection efficiency. The waveform parameters may include parameters such as subcarrier spacing, number of subcarriers, and cyclic prefix (CP) length.

[0099] (7) The access scheme information corresponding to the uplink transmission can be used to instruct the terminal device to adopt access methods such as OMA or NOMA. Different access methods may include different access parameters.

[0100] Optionally, for GF uplink data transmission during random access, the access parameters may further include preamble signal related parameters, where the preamble signal related parameters include, for example, parameters of the sequence used by the preamble signal, the time-frequency resource position of the preamble sequence, root sequence selection, sequence length, number of repetitions, subcarrier spacing, or transmission power.

[0101] Optionally, for SDT transmission, the GF uplink transmission configuration information and / or access parameters may further include at least one of the following:

[0102] The reference signal receiving power (RSRP) threshold is used to indicate the RSRP threshold required to initiate CG-SDT transmission as required by technical specification (TS) TS38.321[3]. This RSRP threshold can be SSB-level and is used to select the appropriate SSB for CG-SDT. The RSRP thresholds for different SSBs at different distances are different.

[0103] Timing advance (TA) configuration is used to adjust TA configuration for different transmission distances.

[0104] Time alignment timer (TAT) configuration, used to indicate the TAT value required by TS38.321[3]. Optionally, the TAT configuration may vary depending on the transmission distance.

[0105] It is understood that the GF uplink transmission configuration information in this application may include at least one of the above information. That is, the terminal device may determine at least one of the above information based on the first correspondence according to the method provided in the embodiments of this application. The above GF uplink transmission configuration information will be described below with reference to specific examples, and the meaning and characteristics of each information item will not be expanded here.

[0106] Optionally, the terminal device may also receive a first correspondence from a network device, wherein the network device may be a non-ground device, or may be a ground device that supports communication with the terminal device, such as an access network device or a core network device deployed on the ground, without specific limitation.

[0107] In addition, the first corresponding relationship in the present application may also be pre-configured in the terminal device, or may be predefined through a protocol, etc. For example, the first corresponding relationship is predefined in the factory configuration of the terminal device.

[0108] In S102, the terminal device may determine non-terrestrial device information based on the ephemeris information, and further determine GF uplink transmission configuration information based on the non-terrestrial device information via a first correspondence. The non-terrestrial device information may include distance information and / or time information. The distance information may be used to indicate the distance between the terminal device performing uplink transmission and the non-terrestrial device. The time information may be used to indicate the transmission delay compensation for the ephemeris information.

[0109] As a possible implementation, when the non-terrestrial device information includes distance information, the first correspondence may include a correspondence between the distance information and the GF uplink transmission configuration information. As a specific example, the distance information may be the distance or predicted distance between the terminal device and the non-terrestrial device during transmission.

[0110] As another possible implementation, when the non-terrestrial device information may include time information, correspondingly, the first correspondence may include a correspondence between the service beam information, the time information and the GF uplink transmission configuration information. For example, the time information may be determined based on the time when the non-terrestrial device sends the ephemeris information, the time when the terminal device receives the ephemeris information, and the transmission delay between the non-terrestrial device and the terminal device. The service beam information may be information about the beam to which the current terminal device is connected (or belongs), wherein the beam information may be synchronization signal and physical broadcast channel (PBCH) block (SSB) information (such as SSB index) or reference signal port information (such as reference signal port index, etc.), wherein the reference signal may be a demodulation reference signal (DMRS) or a channel state information reference signal (CSI-RS), etc.

[0111] The following describes, in conjunction with Method 1 and Method 2, how a terminal device determines GF uplink transmission configuration information based on the first correspondence relationship in each of the two aforementioned implementations. It is understood that when the non-terrestrial device information includes distance information and time information, the method for determining GF uplink transmission configuration information based on the first correspondence relationship can be implemented similarly and will not be further described.

[0112] Mode 1: When the non-terrestrial device information includes distance information, the first correspondence may include the correspondence between the distance information and the GF uplink transmission configuration information as shown in Table 2. The first correspondence may be determined by the network device and indicated to the terminal device.

[0113] Table 2

[0114] Optionally, in Method 1, the terminal device may determine the position or predicted position of the non-terrestrial device based on the ephemeris information, and determine the distance information based on the position information of the terminal device and the position or predicted position of the non-terrestrial device. Exemplarily, the position information of the terminal device and the position of the non-terrestrial device may be the celestial coordinates of the terminal device and the celestial coordinates of the non-terrestrial device, respectively. Specifically, the terminal device may determine the time to perform uplink transmission, and determine the predicted position of the non-terrestrial device at the time of uplink transmission based on the ephemeris information. Therefore, the distance between the terminal device and the non-terrestrial device at the time of uplink transmission may be determined based on the predicted position and the position of the terminal device, and this distance may serve as the distance information.

[0115] Furthermore, the terminal device may determine the GF uplink transmission configuration information by querying the first corresponding relationship based on the distance information. Specifically, the terminal device may query the distance gear (or distance range) that the distance falls into, thereby using the GF uplink transmission configuration information corresponding to the distance gear as the determined GF uplink transmission configuration information. For example, as shown in Table 2, when the terminal device determines that the distance 1 between it and the non-ground device performing uplink transmission falls into distance gear 1, the terminal device may determine to adopt GF uplink transmission configuration information 1 based on Table 2. For another example, when the terminal device determines that the distance 2 between it and the non-ground device performing uplink transmission falls into distance gear 2, the terminal device may determine to adopt GF uplink transmission configuration information 2 based on Table 2. Wherein, distance 1 and distance 2 respectively represent the distances between the terminal device and the non-ground device predicted at different times, or may represent the distances between two terminal devices at different positions and the same non-ground device.

[0116] Optionally, GF uplink transmission configuration information corresponding to the distance information is set according to the distance information. For example, the distance information and the corresponding GF uplink transmission configuration information may satisfy any one or more of the following conditions:

[0117] Condition 1: When the GF uplink transmission configuration information includes a power control scheme (or power parameter), for GF uplink transmission with a larger distance (i.e., larger path loss), a larger initial transmit power parameter is used to improve the reception performance, while for GF uplink transmission with a smaller distance (i.e., smaller path loss), a smaller initial transmit power parameter can be used to reduce transmission interference to other users.

[0118] Taking Table 2 as an example, if both GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 include power control schemes, since the distance value in distance gear 2 is greater than the distance value in distance gear 1, the power control scheme (or power parameter) included in GF uplink transmission configuration information 2 may have a larger initial transmission power P0 to improve reception performance; while the power control scheme (or power parameter) included in uplink transmission configuration information 1 may have a smaller initial transmission power P0 to avoid interference with other users. Among them, the distance value in distance gear 2 is greater than the distance value in distance gear 1, which means that the path loss between the terminal device and the non-ground device at the moment the distance value falls into distance gear 2 is greater than the path loss between the terminal device and the non-ground device at the moment the distance value falls into distance gear 1.

[0119] Based on this design, different P0 values, i.e., other power control parameters, can be used when the distance (or path loss) between the terminal device and the non-terrestrial equipment changes, which can better adapt to the change in the distance (or path loss) between the terminal device and the non-terrestrial equipment.

[0120] Condition 2: When the GF uplink transmission configuration information includes precoding scheme information, for GF uplink transmission over a larger distance, a more complex precoding scheme is used to obtain a larger spatial gain to resist the performance loss caused by path loss, while for GF uplink transmission over a smaller distance, a less complex precoding scheme can be used.

[0121] Still taking Table 2 as an example, if both GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 include precoding schemes, since the distance value in distance gear 2 is greater than the distance value in distance gear 1, the precoding scheme included in GF uplink transmission configuration information 2 needs to adopt a more complex precoding scheme to obtain greater spatial gain to resist the performance loss caused by path loss compared to the precoding scheme included in GF uplink transmission configuration information 1.

[0122] Condition 3: When the GF uplink transmission configuration information includes uplink transmission waveform information, for GF uplink transmission with a larger distance, a waveform with lower power and lower PAPR is used, while for GF uplink transmission with a smaller distance, a waveform with better detection efficiency can be used to relatively reduce power and PAPR requirements.

[0123] Still taking Table 2 as an example, if both GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 include uplink transmission waveform information, since the distance value in distance gear 2 is greater than the distance value in distance gear 1, the uplink transmission waveform corresponding to GF uplink transmission configuration information 2 needs to use a lower power, low PAPR waveform for transmission, such as DFT-S-OFDM; the uplink transmission waveform corresponding to GF uplink transmission configuration information 1 can use a CP-OFDM waveform to obtain better detection efficiency.

[0124] Condition 4: When the GF uplink transmission configuration information includes the number of repeated transmissions, for GF uplink transmissions with a larger distance, a larger number of repeated transmissions is used to improve transmission reliability, while for GF uplink transmissions with a smaller distance, a smaller number of repeated transmissions can be used to reduce resource occupancy.

[0125] Still taking Table 2 as an example, if both GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 include the number of repeated transmissions, since the distance value in distance gear 2 is greater than the distance value in distance gear 1, the number of repeated transmissions K corresponding to GF uplink transmission configuration information 2 is larger, while the number of repeated transmissions K corresponding to GF uplink transmission configuration information 1 is smaller.

[0126] Similarly, the configuration of the redundancy version (RV) in the K transmissions can also be selected based on the distance or path loss of the UE, and different RV configurations can be used to explore a larger repeated transmission combining gain to resist path loss. For example, when the distance between the terminal device and the non-terrestrial device is small during uplink transmission (for example, distance 1 falls into distance gear 1), the RV version values ​​used in the K repeated transmissions corresponding to the GF uplink transmission configuration information 1 can be the same. For example, the K repeated transmissions all use 0 as the RV value. At this time, the gain of time-division transmission can be obtained. When the distance between the terminal device and the non-terrestrial device is large during uplink transmission, the RV version numbers used in the K repeated transmissions corresponding to the GF uplink transmission configuration information can be different. For example, for distance gear N, the RV version numbers used in the K repeated transmissions corresponding to the GF uplink transmission configuration information N are 0, 2, 3 and 1 respectively. At this time, in addition to obtaining time-division gain, additional coding gain can also be obtained.

[0127] Optionally, if the distribution interval of the K repeated transmissions is large, the RV versions of any two repeated transmissions in the K repeated transmissions corresponding to the time information may be different. The distribution interval may be a distance interval or a time interval. The distance interval refers to the difference between the distance between the terminal device and the non-terrestrial device at the time of the first repeated transmission and the distance between the terminal device and the non-terrestrial device at the time of the Kth repeated transmission. The time interval refers to the time difference between the time when the terminal device performs the first repeated transmission and the time when the Kth repeated transmission occurs.

[0128] For example, even if the distance information indicates a smaller range, if the distance interval or time interval between the first and Kth transmissions of K transmissions exceeds a corresponding threshold, the GF uplink transmission configuration information may indicate that the K transmissions use different RV versions. For example, when the time interval between the first and Kth repeated transmissions is greater than the threshold, the K transmissions use 0, 2, 3, and 1 as RV versions, respectively, to achieve coding gain and improve communication performance.

[0129] Condition 5: When the GF uplink transmission configuration information includes a modulation and coding scheme, for GF uplink transmission with a larger distance, a modulation and coding scheme with a lower code rate is used to obtain a larger channel coding gain, while for GF uplink transmission with a smaller distance, a modulation and coding scheme with a higher code rate can be used to improve capacity.

[0130] Taking Table 2 as an example, if both GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 include modulation and coding schemes, since the distance value in distance level 2 is greater than the distance value in distance level 1, the uplink transmission corresponding to the distance falling within distance level 2 requires a greater channel coding gain. Therefore, the modulation and coding scheme corresponding to GF uplink transmission configuration information 2 can select an MCS table with a lower code rate for transmission. Furthermore, the modulation and coding scheme corresponding to GF uplink transmission configuration information 1 can select an MCS table with a higher code rate to transmit more information. Furthermore, similar to this condition is the channel coding scheme. Since the distance value in distance level 2 is greater than the distance value in distance level 1, the channel coding scheme corresponding to GF uplink transmission configuration information 2 can select a channel coding scheme with better performance at a low code rate (such as base graph (BG) 2 encoded with NR low-density parity check (LDPC) code) for transmission, while the channel coding scheme corresponding to GF uplink transmission configuration information 1 can select a channel coding scheme with better performance at a high code rate (such as BG1 encoded with NR LDPC code) for transmission.

[0131] Condition 6: When the GF uplink transmission configuration information includes access scheme information (or access parameters), for GF uplink transmission over a larger distance, an access scheme with better orthogonality and less access interference is adopted, while for GF uplink transmission over a smaller distance, an access scheme with relatively less orthogonality may be adopted. The access scheme information may be used to indicate the access scheme, and the access parameters for different access schemes may be the same or different.

[0132] Still taking Table 2 as an example, the GF parameter can be access scheme information (or access parameter). Taking non-orthogonal access as an example, since the distance value in distance gear 2 is greater than the distance value in distance gear 1, the access scheme corresponding to GF uplink transmission configuration information 2 can use a codebook or sequence with better orthogonality and minimal access interference for transmission. The access scheme corresponding to GF uplink transmission configuration information 1 benefits from the higher SNR and stronger anti-interference ability brought by the shorter communication distance. Therefore, the selection of codebooks or sequences can be relatively loose. For example, a codebook or sequence with general orthogonality can be selected for transmission.

[0133] Optionally, for GF uplink data transmission during the random access process, the access parameters may also include parameters of the sequence used by the preamble signal, the time-frequency resource position of the preamble sequence, root sequence selection, sequence length, number of repetitions, subcarrier spacing, or transmission power and other preamble signal related parameters.

[0134] Exemplarily, under the premise of meeting the timing advance, the preamble signal related parameters are selected based on the distance or distance gear information. For example, Table 2 also includes distance gear 3, wherein the distance value in distance gear 3 is greater than the distance value in distance gear 2, and the distance value in distance gear 2 is greater than the distance value in distance gear 1. The following configuration method can be adopted: the basic sequence indicated by GF uplink transmission configuration information 3 corresponding to distance 3 in distance gear 3 is repeated once, the basic sequence indicated by GF uplink transmission configuration information 2 corresponding to distance 2 in distance gear 2 is repeated twice, and the basic sequence indicated by GF uplink transmission configuration information 1 corresponding to distance 1 in distance gear 1 is repeated four times. For another example, continuing with the above example, under the premise of meeting the timing advance, the subcarrier spacing of the preamble signal configured by GF uplink transmission configuration information 1 corresponding to distance 1 in distance gear 1 is smaller, for example, 1.25 kHz, and the subcarrier spacing of the preamble signal indicated by GF uplink transmission configuration information 2 corresponding to distance 2 in distance gear 2 is larger, for example, 15 kHz. For another example, GF uplink transmission configuration information at different distances corresponds to different preamble root sequences to avoid mutual influence between preamble signals. For example, using the above example, distance 1 in distance gear 1, distance 2 in distance gear 2, and distance 3 in distance gear 3 each correspond to a different preamble root sequence. Optionally, the adjustment of the above-mentioned preamble-related parameters can be achieved by selecting different preamble formats in the preamble signal setting of the two-step random access process. For example, different GF uplink transmission configuration information indicates different preamble signal formats.

[0135] Optionally, for SDT transmission, the GF uplink transmission configuration information may be determined based on the distance or the distance range that the distance falls into. For example, for different distance ranges, different GF uplink transmission configuration information in SDT transmission may include at least one different parameter of the RSRP threshold required to initiate SDT, the TA configuration, or the TAT configuration.

[0136] It can be understood that the above conditions 1 to 6 are optional GF uplink transmission configuration information conditions. For example, when both GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 shown in Table 2 include power control schemes (or power parameters), condition 1 may or may not be satisfied. In addition, any two GF uplink transmission configuration information shown in Table 2 may satisfy one or more of conditions 1 to 6. For example, GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 satisfy conditions 1 and 2, and GF uplink transmission configuration information 3 and GF uplink transmission configuration information 4 (not shown in Table 2) satisfy conditions 3 and 4. In addition, the conditions satisfied by two different sets of uplink transmission configuration information may also overlap. For example, GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 satisfy conditions 1 and 2, and GF uplink transmission configuration information 3 and GF uplink transmission configuration information 4 (not shown in Table 2) satisfy conditions 1, 2, 3, and 4.

[0137] It can also be understood that, for any two GF uplink transmission configuration information included in the first correspondence, some or all parameters in the GF uplink transmission configuration information can be adjusted according to the corresponding distance change. For example, GF uplink transmission configuration information 1 and GF uplink transmission configuration information 2 meet condition 1, and the precoding scheme information corresponding to GF uplink transmission configuration information 1 and the precoding scheme information corresponding to GF uplink transmission configuration information 2 and other parameters are the same. That is to say, only some parameters in the GF uplink transmission configuration information can be changed according to the distance change while keeping other transmissions unchanged.

[0138] Taking Figure 6B as an example, it is assumed that the GF uplink transmission configuration information in Table 2 includes GF uplink transmission configuration information 1, GF uplink transmission configuration information 2, GF uplink transmission configuration information 3, ..., GF uplink transmission configuration information N, which correspond to distance gear 1, distance gear 2, distance gear 3, ..., distance gear N, respectively, wherein the distance values ​​in any two distance gears among distance gear 1, distance gear 2, distance gear 3, ..., distance gear N are different. According to Figure 6B, at time t1, the distance between the UE and the non-terrestrial device is d1, at time t2, the distance between the UE and the non-terrestrial device is d2, and at time t3, the distance between the UE and the non-terrestrial device is d3. Assuming that d1 falls into distance gear 1, d2 falls into distance gear 2, and d3 falls into distance gear 3, then at time 1, time 2, and time 3, the terminal device can respectively use GF uplink transmission configuration information 1, GF uplink transmission configuration information 2, and GF uplink transmission configuration information 3 for uplink transmission. Among them, in the GF uplink transmission configuration information 1, the number of repeated transmissions K=8, the initial transmission power P0_1, and the precoding scheme are recorded as precoding scheme 1 (precoder1); in the GF uplink transmission configuration information 2, the number of repeated transmissions K=6, the initial transmission power P0_2, and the precoding scheme are recorded as precoding scheme 2 (precoder2); in the GF uplink transmission configuration information 3, the number of repeated transmissions K=8, the initial transmission power P0_3, and the precoding scheme are recorded as precoding scheme 3 (precoder3). According to Figure 6B, distance 2 is smaller than distance 1 and distance 3. Therefore, the terminal device can use a smaller number of repeated transmissions when performing uplink transmission at time 2, and a larger number of repeated transmissions at time 1 and time 3. In addition, optionally, P0_2 can be smaller than P0_1 and P0_3. Optionally, the precoding complexity of precoder1 and precoder3 can be higher than that of precoder2 to avoid complexity and to resist greater path loss. Optionally, the non-terrestrial device may configure the correspondence between the distance and the GF uplink transmission configuration information shown in Table 2 to the UE at time t0, ie, the first correspondence. Further, optionally, t0 may be earlier than t1.

[0139] Optionally, for Method 1, the terminal device may also report its location information to the non-terrestrial device, facilitating alignment of the non-terrestrial device with the GF uplink transmission configuration information. For example, the non-terrestrial device may determine the distance between the terminal device and the non-terrestrial device based on its own location information and the terminal device's location information, and determine the GF uplink transmission configuration information based on the distance information by querying the first correspondence. The device may then receive uplink transmissions from the terminal device using the GF uplink transmission configuration information.

[0140] In Mode 2, when the non-terrestrial device information includes time information, the first correspondence may include the correspondence between the serving beam information, time information, and GF uplink transmission configuration information as shown in Table 3. The first correspondence may be determined by the network device and indicated to the terminal device. In Mode 2, the time information may be determined based on the terminal device's uplink transmission time and the reference time information.

[0141] In a possible implementation, the reference time information is the t carried in the ephemeris. 0e For example, the time information is represented as tt 0e Among them, t is the time when the terminal device sends the uplink signal to the non-ground device, which can be called the uplink transmission time. Therefore, the terminal device can use the uplink transmission time and t 0e Confirm the time information.

[0142] It can be understood that, assuming that the terminal device sends uplink information to the non-terrestrial device at time t, the terminal device can 0e The position of the non-ground device at time t is used as the predicted position of the non-ground device when uplink transmission is performed at time t to offset the error caused by transmission delay on position estimation. Therefore, according to the time information tt 0e The first correspondence shown in Table 3 is queried to determine the corresponding GF uplink transmission configuration information. As shown in Figure 7A , as the satellite moves, when the satellite is at the nadir point, the round-trip time (RTT) between the terminal device and the satellite is minimized, and accordingly, the time information determined by the terminal device is smaller. When the satellite moves to the cell edge, the RRT between the terminal device and the satellite is increased, and accordingly, the time information determined by the terminal device is larger.

[0143] For example, Table 3 uses the service beam information as an identifier of the service beam as an example for explanation, and in actual applications, it can also be replaced with other information that can be used to indicate the service beam.

[0144] Table 3

[0145] Among them, the values ​​of t0, t1, t2, ..., tN, t0', t1', t2', ..., and tN' are positive real numbers.

[0146] As shown in Table 3, when the ID of the service beam of the terminal device is ID1, and the moment value indicated by the moment information (recorded as moment 1) falls into the moment gear (or moment range) 1, the GF uplink transmission configuration information obtained by the terminal device inquiring the first corresponding relationship is configuration 1-1. In addition, when the ID of the service beam of the terminal device is ID2, and the moment value indicated by the moment information (recorded as moment 2) still falls into the moment gear 1, the GF uplink transmission configuration information obtained by the terminal device inquiring the first corresponding relationship is configuration 2-1. Among them, configuration 2-1 and configuration 1-1 may have some or all of the same parameters, such as sharing at least one of the same GF parameters, or may not contain the same parameters. In addition, for the same beam, such as beam ID1, the GF uplink transmission configuration information corresponding to different moment information may be partially the same or all of the same, or may be completely different, without specific limitation. In addition, for different beam IDs, the range of moment position 1 may be the same or different, which is not specifically limited in this application. For example, the moment range of moment position 1 corresponding to beam ID1 is (t0, t1], and the moment range of moment position 1 corresponding to beam ID2 is (t0, t1'], t1 may be equal to t1', or t1 may not be equal to t1'. Optionally, for the same beam information and different moment positions, the GF uplink transmission configuration information may also be the same, which is not specifically restricted in this application.

[0147] Alternatively, assuming that the time information determined by the terminal device is the same when the satellite is located at the two cell edge positions shown in FIG7A , since the service beams of the terminal device are different when the satellite is at these two different cell edge positions, different GF uplink transmission configuration information can also be used under the same time information. In other words, in this application, when the time information determined by the terminal device is the same, the beam information can be used to distinguish the GF uplink transmission configuration information used by the terminal device when the satellite is at different positions.

[0148] Based on this design, different GF parameter configuration information can be used when the time information between the terminal device and the non-terrestrial equipment changes, which can better adapt to changes in the communication environment between the terminal device and the non-terrestrial equipment.

[0149] Optionally, corresponding GF uplink transmission configuration information is set according to the time information. For example, the time information of the same service beam and the corresponding multiple GF uplink transmission configuration information may satisfy any one or more of the following conditions:

[0150] Condition 7, when the GF uplink transmission configuration information includes a power control scheme (or power parameters), if the moment indicated by the moment information belongs to the time period when the satellite is away from the terminal (or time slot, for example, the time period when the satellite moves to the cell edge position shown in Figure 7A), then the GF uplink transmission configuration information can use a larger initial transmission power parameter to improve the reception performance. If the moment indicated by the moment information belongs to the time period when the satellite moves to the vicinity of the sub-satellite point (or time slot, for example, the time period when the satellite moves to the vicinity of the sub-satellite point position shown in Figure 7A), then the GF uplink transmission configuration information can use a smaller initial transmission power parameter to reduce transmission interference to other users. It can be understood that due to satellite movement, the distance between the same beam pointing area and the non-ground equipment is time-varying, and the distance at different times is significantly different. The GF parameter configuration list based on Table 3 can make the optimal GF uplink transmission configuration parameters within the area within different moment information, so the terminal device within the beam service area selects the parameters within the matching time period as the moment information changes.

[0151] Condition 8: When the GF uplink transmission configuration information includes precoding scheme information, if the moment indicated by the time information belongs to the time period (or time slot) when the satellite is far away from the terminal, the GF uplink transmission configuration information can adopt a more complex precoding scheme to obtain a greater spatial gain to resist the performance loss caused by path loss; if the moment indicated by the time information belongs to the time period (or time slot) when the satellite moves to the vicinity of the sub-satellite point, the GF uplink transmission configuration information can adopt a less complex precoding scheme.

[0152] Condition 9: When the GF uplink transmission configuration information includes uplink transmission waveform information, if the moment indicated by the time information belongs to the time period (or time slot) when the satellite is far away from the terminal, the GF uplink transmission configuration information can use a waveform with lower power and low PAPR; if the moment indicated by the time information belongs to the time period (or time slot) when the satellite moves to the vicinity of the sub-satellite point, the GF uplink transmission configuration information can use a waveform with better detection efficiency, relatively reducing the power and PAPR requirements.

[0153] Condition 10: When the GF uplink transmission configuration information includes the number of repeated transmissions, if the moment indicated by the time information belongs to the time period (or time slot) when the satellite is away from the terminal, the GF uplink transmission configuration information can use a larger number of repeated transmissions K to improve transmission reliability; if the moment indicated by the time information belongs to the time period (or time slot) when the satellite moves to the vicinity of the sub-satellite point, the GF uplink transmission configuration information can use a smaller number of repeated transmissions K to reduce resource occupancy.

[0154] Similarly, the configuration of the redundant version in the K transmissions can also be selected according to the time slot to which the UE's time information belongs, and different RV configurations can be used to explore a larger repeated transmission merging gain to resist path loss. For example, when the time information belongs to the time period (or time slot) when the satellite moves to the vicinity of the sub-satellite point, the RV versions of the K repeated transmissions corresponding to the time information are the same, such as all 0. At this time, the terminal device can use the same RV version for the K repeated transmissions, and the gain of time-division transmission can be obtained. When the time information belongs to the time period (or time slot) when the satellite is away from the terminal, the RV version numbers of the K repeated transmissions corresponding to the time information can be different. For example, when the number of repeated transmissions is 4, the 4 repeated transmissions use 0, 2, 3 and 1 as the RV version numbers respectively. At this time, multiple terminal devices can transmit according to the RV version numbers corresponding to the GF uplink transmission configuration information 1 to the GF uplink transmission configuration information 4. In addition to obtaining time-division gain, additional coding gain can also be obtained.

[0155] Optionally, if the distribution interval of the K repeated transmissions is large, the RV versions of any two repeated transmissions in the K repeated transmissions corresponding to the time information can be different. As described above, even if the time information belongs to the time period (or time slot) when the satellite moves near the sub-satellite point, if the distance interval or time interval between the first and K-th transmissions of the K transmissions exceeds a corresponding threshold, the GF uplink transmission configuration information can indicate that the K transmissions use different RV versions. For example, when the time interval between the first and K-th repeated transmissions is greater than the threshold, the K transmissions use 0, 2, 3, and 1 as RV version numbers, respectively, to obtain coding gain and improve communication performance.

[0156] Condition 11: When the GF uplink transmission configuration information includes a modulation and coding scheme, if the moment indicated by the time information belongs to the time period (or time slot) when the satellite is away from the terminal, the GF uplink transmission configuration information can adopt a modulation and coding scheme with a lower code rate to obtain a greater channel coding gain; if the moment indicated by the time information belongs to the time period (or time slot) when the satellite moves to the vicinity of the sub-satellite point, the GF uplink transmission configuration information can adopt a modulation and coding scheme with a higher code rate to increase capacity.

[0157] Condition 12: When the GF uplink transmission configuration information includes access scheme information (or access parameters), if the moment indicated by the time information belongs to the time period (or time slot) when the satellite is away from the terminal, the GF uplink transmission configuration information can adopt an access scheme with better orthogonality and less access interference; if the moment indicated by the time information belongs to the time period (or time slot) when the satellite moves to the vicinity of the sub-satellite point, the GF uplink transmission configuration information can adopt an access scheme with relatively poor orthogonality to reduce the overhead of the access process.

[0158] Optionally, for GF uplink data transmission during random access, the access parameters may also include preamble signal related parameters, for details, see the description of condition 6. For example, for the same service beam information, when the time value in time slot 3 is greater than the time value in time slot 2, and the time value in time slot 2 is greater than the time value in time slot 3, the following configuration method may be adopted: the basic sequence indicated by the GF uplink transmission configuration information corresponding to time slot 1 is repeated once, the basic sequence indicated by the GF uplink transmission configuration information corresponding to time slot 2 is repeated twice, and the basic sequence indicated by the GF uplink transmission configuration information corresponding to time slot 3 is repeated four times. For another example, continuing with the above example, under the same service beam information, on the premise of meeting the timing advance, the subcarrier spacing of the preamble signal configured by the GF uplink transmission configuration information corresponding to time slot 2 is smaller, for example, 1.25kHz, and the subcarrier spacing of the preamble signal indicated by the GF uplink transmission configuration information corresponding to time slot 1 is larger, for example, 15kHz. For another example, using the above example, under the same serving beam information, the GF uplink transmission configuration information corresponding to the gear positions at different times corresponds to different preamble root sequences to avoid mutual influence between the preamble signals. Optionally, the above adjustment can be achieved by selecting different preamble signal formats in the preamble signal setting of the two-step random access process. For example, different GF uplink transmission configuration information indicates (or corresponds to) different preamble signal formats.

[0159] Optionally, for SDT transmission, the GF uplink transmission configuration information may be determined based on the time information or the time slot corresponding to the time information. For example, for different time slots, different GF uplink transmission configuration information in SDT transmission may include at least one different parameter of the RSRP threshold required to initiate SDT, TA verification configuration, or TAT configuration.

[0160] The implementation of the above conditions 7 to 12 can refer to the description of conditions 1 to 6, the difference being that in conditions 7 to 12, the corresponding GF uplink transmission configuration information is determined according to the time slot into which the time information falls.

[0161] In addition, it can be understood that for different service beams, the GF uplink transmission configuration information corresponding to the same time value (or time gear) may be different. The reason is that, as shown in Figure 7B, different service beams correspond to different service areas, where Figure 7B uses a hexagonal area to represent the service area of ​​a beam. Therefore, at a certain moment, the distance (or path loss) between the terminal device in the service area of ​​different service beams and the same non-ground equipment is different. Therefore, there is a need to set different GF uplink transmission configuration information for different service beams. Combining the service beam information and the time information to set the corresponding GF uplink transmission configuration information can adapt to the path loss changes caused by the beam information and transmission delay, and provide communication performance.

[0162] Optionally, as another feasible implementation of method 2, the reference time information is the reference time subframe number N0, or its corresponding coordinated universal time (UTC) time. The terminal device can calculate the UTC time corresponding to the reference time based on the reference time subframe number N0. In this implementation, the time information can be expressed as t-t0. t0 can be the UTC time corresponding to N0, and t is the uplink transmission time of the terminal device. Optionally, t0 can also be carried in the ephemeris information; or, the ephemeris information can carry N0, and the terminal device calculates the corresponding UTC time t0 based on N0.

[0163] It is understood that in this implementation, the correspondence shown in Table 3 needs to be replaced with the correspondence between beam information, t-t0, and GF uplink transmission configuration information. The configuration method of the GF uplink transmission configuration information in the first correspondence can refer to the description of Table 3 and will not be repeated here.

[0164] For example, based on the description of Method 2, in Method 2, the terminal device may determine the time information based on the ephemeris information, and query the first correspondence based on the serving beam information and the time information to determine the GF uplink transmission configuration information. Specifically, the terminal device may determine the time to perform the uplink transmission, determine the predicted position of the non-ground device at the time of the uplink transmission based on the ephemeris information, and determine the time information based on the predicted position. For example, the time information may be determined based on Formula 1, or the time information may be determined based on a table lookup or other method.

[0165] Optionally, for Method 2, the terminal device may also report its location information to the non-terrestrial device, facilitating alignment of the non-terrestrial device with the GF uplink transmission configuration information. For example, the non-terrestrial device may determine the time information based on its own location information and the terminal device's location information, and determine the GF uplink transmission configuration information by querying the first correspondence between the serving beam information and the time information, thereby receiving uplink transmissions from the terminal device using the GF uplink transmission configuration information.

[0166] S103: The terminal device performs uplink transmission according to the GF uplink transmission configuration information.

[0167] Accordingly, the non-ground device receives the uplink transmission of the terminal device, or the non-ground device transparently transmits the uplink transmission of the terminal device to the ground device. Optionally, the network device can obtain GF uplink transmission configuration information synchronized with the terminal device based on the location information of the terminal device to improve reception performance.

[0168] It is understood that S101 to S103 can be applicable to uplink data transmission during random access, can also be applicable to direct data transmission, and can also be applicable to packet transmission, without specific limitation. Among them, for uplink data transmission during random access, in S103, the terminal device can send uplink data and random access preamble (i.e., preamble signal) in one message. For direct data transmission, in S103, the terminal device can send uplink data without sending a preamble signal.

[0169] It is understandable that in order to implement the functions in the above embodiments, the embodiments of the present application also provide a communication device. The communication device may include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily appreciate that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a manner driven by computer software depends on the specific application scenario and design constraints of the technical solution.

[0170] Figures 8 to 10 are schematic diagrams of the structure of possible communication devices provided by embodiments of the present application. This communication device can be used to implement the corresponding functions of the above-mentioned method embodiments, thereby also achieving the beneficial effects of the above-mentioned method embodiments. In one possible implementation, the communication device can be a network device or terminal device as shown in Figure 1 or Figure 2. For relevant details and effects, please refer to the description of the aforementioned embodiments.

[0171] As shown in Figure 8 , the communication device 800 includes a processing unit 810 and a communication unit 820 , wherein the communication unit 820 may also be a transceiver unit or an input / output interface, etc. The communication device 800 may be used to implement the functions of the transmitter or receiver in the method embodiment shown in Figure 5 .

[0172] 5, the processing unit 810 may be configured to obtain ephemeris information and determine dynamic authorization-free uplink transmission configuration information based on the ephemeris information through a first correspondence. The communication unit 820 may be configured to perform uplink transmission based on the uplink configuration information.

[0173] In one possible implementation, the processing unit 810 can be specifically used to determine non-ground device information based on the ephemeris information, and the non-ground device information includes distance information and / or time information, wherein the distance information is used to indicate the distance between the terminal performing uplink transmission and the non-ground device, and the time information is determined based on the uplink transmission time and reference time information, and the reference time information is included in the ephemeris information; and, it can be used to determine the dynamic authorization-free uplink transmission configuration information based on the non-ground device information through a first corresponding relationship.

[0174] In a possible implementation, the non-terrestrial device information includes the distance information, and the processing unit 810 may be specifically configured to query the first corresponding relationship according to the distance information to determine the dynamic authorization-free uplink transmission configuration information.

[0175] In a possible implementation, the non-terrestrial device information includes the time information, and the processing unit 810 can be specifically used to determine the dynamic authorization-free uplink transmission configuration information by querying a first correspondence based on the service beam information and the time information.

[0176] In a possible implementation, the communication unit 820 may be further configured to receive the first corresponding relationship from a network device.

[0177] In one possible implementation, the dynamic authorization-free uplink transmission configuration information includes at least one of the following: time-frequency resource location information; modulation and coding scheme; number of repeated transmissions; power control parameters; precoding scheme information; uplink transmission waveform information; access scheme parameters corresponding to uplink transmission; preamble signal sequence parameters; time-frequency resource information of the preamble sequence; root sequence information of the preamble signal; subcarrier spacing; reference signal receiving power threshold; timing advance configuration; time configuration of its timer for time-frequency resource location information; modulation and coding scheme; number of repeated transmissions; power control scheme information; power control parameters; precoding scheme information; uplink transmission waveform information; access scheme information corresponding to uplink transmission; access parameters corresponding to uplink transmission.

[0178] The division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0179] As shown in Figure 9, a communication device 900 provided in an embodiment of the present application is used to implement the communication method provided in the present application. The communication device 900 can be a communication device that applies the communication method, or it can be a component in a communication device, or it can be a device that can be used in conjunction with a communication device. The communication device 900 can be a transmitting end or a receiving end. Among them, the communication device 900 can be a chip system or a chip. In the embodiment of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. The communication device 900 includes at least one processor 920 for implementing the communication method provided in the embodiment of the present application. The communication device 900 may also include an output interface 910, which can also be called an input-output interface. In the embodiment of the present application, the output interface 910 can be used to communicate with other devices via a transmission medium, and its functions may include sending and / or receiving. For example, when the communication device 900 is a chip, it transmits to other chips or devices via the output interface 910. The processor 920 can be used to implement the method shown in the above method embodiment.

[0180] Exemplarily, the processor 920 may be used to execute actions executed by the processing unit 810 , and the output interface 910 may be used to execute actions executed by the communication unit 820 , which will not be described in detail.

[0181] Optionally, the communication device 900 may further include at least one memory 930 for storing program instructions and / or data. The memory 930 is coupled to the processor 920. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, and is used for information exchange between devices, units, or modules. The processor 920 may operate in conjunction with the memory 930. The processor 920 may execute program instructions stored in the memory 930. At least one of the at least one memory may be integrated with the processor.

[0182] In an embodiment of the present application, the memory 930 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or may be a volatile memory (volatile memory), such as a random-access memory (RAM). A memory is any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The memory in the embodiment of the present application may also be a circuit or any other device that can implement a storage function, for storing program instructions and / or data.

[0183] In the embodiments of the present application, the processor 920 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0184] As shown in Figure 10, a communication device 1000 provided in an embodiment of the present application is used to implement the communication method provided in the present application. The communication device 1000 can be a communication device that applies the communication method shown in the embodiment of the present application, or it can be a component in a communication device, or it can be a device that can be used in combination with a communication device. The communication device 1000 can be a transmitting end or a receiving end. Among them, the communication device 1000 can be a chip system or a chip. In the embodiment of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. Part or all of the communication method for applying the Huygens equivalent surface provided in the above embodiment can be implemented by hardware or by software. When implemented by hardware, the communication device 1000 may include: an input interface circuit 1001, a logic circuit 1002 and an output interface circuit 1003.

[0185] Optionally, taking the device being used to implement the function of the receiving end as an example, the input interface circuit 1001 can be used to execute the above-mentioned receiving action performed by the communication unit 820, the output interface circuit 1003 can be used to execute the above-mentioned sending action performed by the communication unit 820, and the logic circuit 1002 can be used to execute the above-mentioned action performed by the processing unit 1010, which will not be repeated.

[0186] Optionally, the communication device 1000 may be a chip or an integrated circuit in a specific implementation.

[0187] Part or all of the operations and functions performed by the communication device described in the above method embodiments of the present application can be completed using a chip or an integrated circuit.

[0188] An embodiment of the present application provides a computer-readable storage medium storing a computer program, wherein the computer program includes instructions for executing the above method embodiment.

[0189] An embodiment of the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the above method embodiment.

[0190] The present application provides a communication system. Specifically, the communication system may include a first communication device for implementing the method shown in FIG5 . For details, please refer to the relevant description in the above method embodiment, which will not be repeated here. The communication system may include the structure shown in FIG1 .

[0191] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0192] The present application is described with reference to the flow chart and / or block diagram of the method, device (system), and computer program product according to the embodiment of the present application. It should be understood that each flow process and / or box in the flow chart and / or block diagram and the combination of the flow process and / or box in the flow chart and / or block diagram can be realized by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processing machine or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for realizing the function specified in one flow chart flow or multiple flows and / or one box or multiple boxes of the block diagram.

[0193] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0194] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

Claims

1. A communication method, characterized in that: Applied to non-terrestrial network communication systems, including: Get ephemeris information; Determine dynamic authorization-free uplink transmission configuration information according to the ephemeris information through a first corresponding relationship; Perform uplink transmission according to the uplink configuration information.

2. The method according to claim 1, characterized in that The determining the dynamic authorization-free uplink transmission configuration information according to the ephemeris information through a first corresponding relationship includes: Determine non-terrestrial device information according to the ephemeris information, the non-terrestrial device information including distance information and / or time information, wherein the distance information is used to indicate the distance between the terminal performing uplink transmission and the non-terrestrial device, and the time information is determined according to the uplink transmission time and reference time information, and the reference time information is included in the ephemeris information; The dynamic authorization-free uplink transmission configuration information is determined according to the non-terrestrial device information via a first corresponding relationship.

3. The method according to claim 2, characterized in that The non-terrestrial device information includes the distance information, and determining the dynamic authorization-free uplink transmission configuration information according to the non-terrestrial device information through a first corresponding relationship includes: The first corresponding relationship is queried according to the distance information to determine the dynamic authorization-free uplink transmission configuration information.

4. The method according to claim 2, characterized in that The non-terrestrial device information includes the time information, and the determining the dynamic authorization-free uplink transmission configuration information according to the non-terrestrial device information through a first corresponding relationship includes: The dynamic authorization-free uplink transmission configuration information is determined by querying a first corresponding relationship based on the service beam information and the time information.

5. The method according to any one of claims 2 to 4, characterized in that: The method further comprises: The first corresponding relationship is received from a network device.

6. The method according to any one of claims 1 to 5, characterized in that: The dynamic authorization-free uplink transmission configuration information includes at least one of the following: Time-frequency resource location information; Modulation and coding scheme; Number of retransmissions; Power control parameters; Precoding scheme information; Uplink transmission waveform information; Access scheme parameters corresponding to uplink transmission; Preamble signal sequence parameters; Time-frequency resource information of the leading sequence; Root sequence information of the leading signal; Subcarrier spacing; A reference signal receiving power threshold; Timing advance configuration; Time for its timer configuration.

7. A communication device, characterized in that: Applied to non-terrestrial network communication systems, including: A processing unit, configured to obtain ephemeris information, and determine dynamic authorization-free uplink transmission configuration information according to the ephemeris information through a first corresponding relationship; A communication unit is used to perform uplink transmission according to the uplink configuration information.

8. The device according to claim 7, characterized in that The processing unit is specifically used for: Determine non-terrestrial device information according to the ephemeris information, the non-terrestrial device information including distance information and / or time information, wherein the distance information is used to indicate the distance between the terminal performing uplink transmission and the non-terrestrial device, and the time information is determined according to the uplink transmission time and reference time information, and the reference time information is included in the ephemeris information; The dynamic authorization-free uplink transmission configuration information is determined according to the non-terrestrial device information via a first corresponding relationship.

9. The device according to claim 8, characterized in that The non-ground device information includes the distance information, and the processing unit is specifically configured to: The first corresponding relationship is queried according to the distance information to determine the dynamic authorization-free uplink transmission configuration information.

10. The device according to claim 7, characterized in that The non-ground device information includes the time information, and the processing unit is specifically configured to: The dynamic authorization-free uplink transmission configuration information is determined by querying a first corresponding relationship based on the service beam information and the time information.

11. The device according to any one of claims 8 to 10, characterized in that: The communication unit is also used for: The first corresponding relationship is received from a network device.

12. The device according to any one of claims 7 to 11, characterized in that: The dynamic authorization-free uplink transmission configuration information includes at least one of the following: Time-frequency resource location information; Modulation and coding scheme; Number of retransmissions; Power control parameters; Precoding scheme information; Uplink transmission waveform information; Access scheme parameters corresponding to uplink transmission; Preamble signal sequence parameters; Time-frequency resource information of the leading sequence; Root sequence information of the preamble signal; Subcarrier spacing; A reference signal receiving power threshold; Timing advance configuration; Time for its timer configuration.

13. A communication device, characterized in that: include: A processor, when the communication device is running, the processor is used to execute computer program instructions so that the communication device performs the method according to any one of claims 1 to 6.

14. The device according to claim 13, characterized in that It also includes a memory and / or a transceiver, the memory being used to store the computer program instructions.

15. A communication device, characterized in that: Used to perform the method according to any one of claims 1 to 6.

16. A chip system, characterized in that: The chip system includes a logic circuit and an input and output interface, wherein: The input-output interface is used to communicate with other communication devices outside the chip system, and the logic circuit is used to execute the method as described in any one of claims 1-6.

17. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store computer program instructions, and when the computer program instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 6.

18. A computer program product, characterized in that The computer program product comprises computer program instructions, and when the computer program instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 6.

19. A communication system, characterized in that: It comprises a sending device and a receiving device, wherein the sending device is used to execute the method according to any one of claims 1-6.

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