Wireless Communication Method and Apparatus, Terminal and Network Device

Abstract

Embodiments of the present application disclose a wireless communication method, apparatus, terminal, and network device, which are applied to a non-terrestrial network communication system. The non-terrestrial network communication system includes a terminal and a network device. The method includes: the network device sends a first DCI to the terminal, and the first DCI carries first indication information; the terminal obtains the first DCI and determines whether there are J PDCCH monitoring opportunities for monitoring a target PDCCH during the repeated transmission of the data scheduled by the first DCI according to the first indication information in the first DCI; or determines whether to monitor the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI according to the first indication information, thereby facilitating ensuring the rationality and flexibility of the PDCCH monitoring opportunity configuration process during the repeated transmission of one piece of data in the non-terrestrial network communication system.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a wireless communication method and apparatus, a terminal, and a network device. Background Art

[0002] Currently, the 3rd generation partnership project (3GPP) is formulating protocol standards for non-terrestrial network (NTN) communications, and its protocol standards mainly involve spaceborne vehicles or airborne vehicles, such as geostationary earth orbit satellites, low earth orbit satellites, highly elliptical orbit satellites, high-altitude platform stations (HAPS), etc.

[0003] In addition, in the Internet of Things protocol, in order to ensure the communication coverage, the existing narrow band internet of things (NB-IoT) or enhanced machine-type communication (eMTC) adopts a retransmission technology. However, since the satellites in the NTN communication system are very far from the ground and the satellites also move continuously along fixed orbits, the propagation distance (i.e., propagation delay) between the terminal and the satellite is often large. If the NTN communication system also considers the retransmission technology in the Internet of Things protocol (i.e., the satellite Internet of Things scenario), it may lead to a longer duration for a single data transmission by the terminal. Due to the rapid movement of the satellite, the terminal may perform beam switching during this data transmission process. Therefore, how to receive the beam switching indication sent by the network during this single data transmission process (i.e., listening to the physical downlink control channel during a single data transmission). In addition, regarding the beam switching problem, in the future, beam switching may be achieved by means of carrier switching, that is, different beams correspond to different carriers. In other words, due to the rapid movement of the satellite, the terminal may need to perform carrier switching during this single data transmission process. Therefore, how to receive the carrier switching indication sent by the network during this single data transmission process (i.e., listening to the physical downlink control channel during a single data transmission) is a problem that needs to be solved currently. Summary of the Invention

[0004] An embodiment of the present application provides a wireless communication method, apparatus, terminal, and network device, aiming to ensure the rationality and flexibility of the PDCCH monitoring opportunity configuration process during the repeated transmission of primary data in a non-terrestrial network communication system by sending a first DCI carrying first indication information from the network device to the terminal.

[0005] In a first aspect, an embodiment of the present application provides a wireless communication method applied to a terminal in a non-terrestrial network communication system, where the non-terrestrial network communication system includes the terminal and a network device; the method includes:

[0006] Obtain first downlink control information (DCI) from a network device, where the first DCI carries first indication information;

[0007] Determine, according to the first indication information, whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel (PDCCH) during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or,

[0008] Determine, according to the first indication information, whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0009] In a second aspect, an embodiment of the present application provides a wireless communication method applied to a network device in a non-terrestrial network communication system, where the non-terrestrial network communication system includes the network device and a terminal; the method includes:

[0010] Send first downlink control information (DCI) to the terminal, where the first DCI carries first indication information;

[0011] The first indication information is used for the terminal to determine whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel (PDCCH) during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or,

[0012] The first indication information is used for the terminal to determine whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0013] In a third aspect, an embodiment of the present application provides a wireless communication apparatus applied to a terminal in a non-terrestrial network communication system, where the non-terrestrial network system includes the terminal and a network device; the apparatus includes a processing unit and a communication unit, and the processing unit is configured to:

[0014] Obtain first downlink control information DCI from a network device through the communication unit, where the first DCI carries first indication information;

[0015] Determine, according to the first indication information, whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, where J is an integer greater than 1; or determine, according to the first indication information, whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0016] In a fourth aspect, an embodiment of the present application provides a wireless communication device, which is applied to a network device in a non-terrestrial network communication system, and the non-terrestrial network communication system includes the network device and a terminal; the device includes a processing unit and a communication unit, and the processing unit is configured to:

[0017] Send first downlink control information DCI to the terminal through the communication unit, where the first DCI carries first indication information; the first indication information is used for the terminal to determine whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, where J is an integer greater than 1; or the first indication information is used for the terminal to determine whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0018] In a fifth aspect, an embodiment of the present application provides a terminal, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and are configured to be executed by the processor, and the one or more programs include instructions for performing the steps in any method of the first aspect of the embodiments of the present application.

[0019] In a sixth aspect, an embodiment of the present application provides a network device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and are configured to be executed by the processor, and the one or more programs include instructions for performing the steps in any method of the second aspect of the embodiments of the present application.

[0020] In a seventh aspect, an embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes some or all of the steps described in any method of the first aspect or the second aspect of the embodiments of the present application.

[0021] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, and the computer program causes a computer to execute some or all of the steps described in any one of the methods in the first aspect or the second aspect of the embodiments of the present application.

[0022] In a ninth aspect, an embodiment of the present application provides a computer program, wherein the computer program is operable to cause a computer to execute some or all of the steps described in any one of the methods in the first aspect or the second aspect of the embodiments of the present application. The computer program may be a software installation package.

[0023] It can be seen that in the embodiments of the present application, when the NTN communication system also considers the retransmission technology in the Internet of Things protocol, since the retransmission of data between the terminal and the satellite will have a long duration, the embodiments of the present application consider sending a first DCI carrying first indication information from the network device to the terminal, which is beneficial to indicating by the network to the terminal whether there are J listening opportunities for listening to the target PDCCH during the retransmission of the data scheduled by the first DCI; or, indicating by the network to the terminal whether to listen to the target PDCCH on the J PDCCH listening opportunities during the retransmission of the data scheduled by the first DCI, and is beneficial to ensuring the rationality and flexibility of the PDCCH listening opportunity configuration process during the retransmission of a piece of data in the non-terrestrial network communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 is a schematic structural diagram of a non-terrestrial network communication system provided by an embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of a transparent satellite communication system provided by an embodiment of the present application;

[0027] Figure 3 is a schematic structural diagram for comparing the signal reception quality between a terrestrial network communication system and a non-terrestrial network communication system provided by an embodiment of the present application;

[0028] Figure 4 is a schematic structural diagram for comparing the architectures of a non-terrestrial network communication system provided by an embodiment of the present application;

[0029] Figure 5 It is a schematic flowchart of a wireless communication method provided by an embodiment of the present application;

[0030] Figure 6 It is a schematic structural diagram of inserting a PDCCH monitoring opportunity during the repeated transmission of data scheduled by a first DCI;

[0031] Figure 7 It is a schematic structural diagram of a 1-bit information for indicating whether there is a PDCCH monitoring opportunity within the repeated transmission period of one-time data scheduled by a first DCI;

[0032] Figure 8 It is a schematic structural diagram of another 1-bit information for indicating whether there is a PDCCH monitoring opportunity within the repeated transmission period of one-time data scheduled by a first DCI;

[0033] Figure 9 It is a schematic structural diagram of a 1-bit information for indicating whether to monitor a target PDCCH on a PDCCH monitoring opportunity within the repeated transmission period of one-time data scheduled by a first DCI;

[0034] Figure 10 It is a schematic structural diagram of another 1-bit information for indicating whether to monitor a target PDCCH on a PDCCH monitoring opportunity within the repeated transmission period of one-time data scheduled by a first DCI;

[0035] Figure 11 It is a schematic structural diagram of an architecture of a non-terrestrial network communication scenario;

[0036] Figure 12 It is a block diagram of functional units of a wireless communication device provided by an embodiment of the present application;

[0037] Figure 13 It is a block diagram of functional units of another wireless communication device provided by an embodiment of the present application;

[0038] Figure 14 It is a schematic structural diagram of a terminal provided by an embodiment of the present application;

[0039] Figure 15 It is a schematic structural diagram of a network device provided by an embodiment of the present application. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. For the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] The technical solutions in the embodiments of the present application can be applied to a non-terrestrial network (NTN) communication system, and the NTN communication system generally uses satellite communication to provide communication services to ground terminals.

[0042] Exemplarily, the non-terrestrial network communication system to which the embodiments of the present application are applied is as Figure 1 shown. The non-terrestrial network communication system 10 may include a terminal 110, a reference point 120 within a cell, a satellite 130, a non-terrestrial network gateway (NTN gateway) 140, and a network device 150. Among them, the terminal 110, the non-terrestrial network gateway 140, and the network device 150 may be located on the Earth's surface, while the satellite 130 is located in the Earth's orbit. The satellite 130 can provide communication services to the geographical area covered by the signal and can communicate with the terminal 110 located within the signal coverage area. At the same time, the terminal 110 is located within a certain cell, and the cell includes a reference point 120 within the cell. In addition, the wireless communication link between the terminal 110 and the satellite 130 is called a service link, and the wireless communication link between the satellite 130 and the non-terrestrial network gateway (NTN gateway) 140 is called a feeder link. It should be noted that the non-terrestrial network gateway (NTN gateway) 140 and the network device 150 may be integrated into the same device or may be separate different devices, and no specific limitation is made thereto.

[0043] The embodiments of the present application describe each embodiment in combination with the terminal, the satellite, and the network device. The following is a specific introduction thereto.

[0044] Specifically, the terminal in the embodiments of the present application may be a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile device, a remote station, a remote terminal, a mobile device, a user terminal, a smart terminal, a wireless communication device, a user agent, or a user device. The terminal may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication functions, a computing device, or other processing devices connected to a wireless modem, a relay device, a vehicle-mounted device, a wearable device, an Internet of Things device, a terminal in a next-generation communication system such as an NR network, or a terminal in a future evolved public land mobile network (PLMN), etc., which is not specifically limited herein.

[0045] Furthermore, the terminal may be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it may be deployed on water (such as on a ship, etc.); it may also be deployed in the air (such as on an airplane, a balloon, a satellite, etc.).

[0046] Furthermore, the terminal may be a mobile phone, a tablet computer, a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a vehicle-mounted device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, or a wireless terminal device in smart home, etc.

[0047] Specifically, the satellite in the embodiments of the present application may be a spacecraft carrying a bent pipe payload or a regenerative payload signal transmitter, which usually operates in a low earth orbit (LEO) at an altitude between 300 and 1500 km, a medium earth orbit (MEO) at an altitude between 7000 and 25000 km, a geostationary earth orbit (GEO) at an altitude of 35786 km, or a high elliptical orbit (HEO) at an altitude between 400 and 50000 km. That is to say, the satellite can be an LEO satellite, an MEO satellite, a GEO satellite, or an HEO satellite, etc., according to different orbital altitudes.

[0048] Furthermore, the signals transmitted by the satellite in the embodiments of the present application usually generate one or more beams (or beam footprints) on a given service area bounded by its field of view. At the same time, the shape of a beam on the ground can be elliptical, and the field of view of the satellite depends on the antenna and the minimum elevation angle, etc.

[0049] Specifically, the non-terrestrial network gateway in the embodiments of the present application can be an earth station or gateway located on the earth's surface and capable of providing sufficient radio frequency (RF) power and RF sensitivity to connect to the satellite. At the same time, the non-terrestrial network gateway can be a transport network layer (TNL) node.

[0050] Specifically, the network device in the embodiments of the present application may be a base transceiver station (BTS) in a global system of mobile communication (GSM) communication system or a code division multiple access (CDMA) communication system, a node B (NB) in a wideband code division multiple access (WCDMA) communication system, an evolved node B (eNB or eNodeB) in a long term evolution (LTE) communication system, or a gNB in a new radio (NR) communication system. The network device may also be an access point (AP) in a wireless local area network (WLAN), a relay station, a network device in a future evolved public land mobile network (PLMN) or a network device in a non-terrestrial network (NTN) communication system, etc.

[0051] It should be noted that in some network deployments, a gNB may include a centralized unit (CU) and a distributed unit (DU), and a gNB may also include an active antenna unit (AAU). Among them, the CU can implement some functions of the gNB, and the DU can also implement some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) layer and the packet data convergence protocol (PDCP) layer; the DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. In addition, the AAU implements some physical layer processing functions, radio frequency processing, and functions related to active antennas. Since the information in the RRC layer will ultimately become the information in the PHY layer, or is transformed from the information in the PHY layer, high-layer signaling (such as RRC layer signaling) can be considered to be sent by the DU, or sent by the DU and the AAU. It can be understood that the network device may include one or more devices among the CU node, the DU node, and the AAU node. In addition, the CU can be classified as a network device in the radio access network (RAN), or the CU can be classified as a network device in the core network (CN), and no specific restrictions are imposed on this.

[0052] Exemplarily, the embodiment of the present application provides a schematic architecture diagram of a communication system with a transparent satellite, as Figure 2 shown. Among them, the terminal, the non-terrestrial network gateway, and the gNB are located on the earth's surface, while the satellite is located in the earth's orbit. At the same time, the satellite, the non-terrestrial network gateway, and the gNB can serve as a 5G radio access network (NG-RAN), and the NG-RAN is connected to the 5G core network through the NG interface. It should be noted that the satellite payload implements frequency conversion and radio frequency amplifiers in both the uplink and downlink directions, and the satellite corresponds to an analog RF repeater. In addition, different transparent satellites can be connected to the same gNB on the ground.

[0053] Before introducing the carrier switching method provided by the embodiment of the present application in detail, the related communication technologies involved in the present application will be introduced.

[0054] 1. Multi-carriers in narrow band internet of things (NB-IoT)

[0055] Since the bandwidth of a single frequency point cell in NB-IoT is only 180 kHz, and after deducting the overheads of narrow-band primary synchronization signal (NPSS), narrow-band secondary synchronization signal (NSSS), and narrow-band system information block (SIB-NB), the remaining traffic channel capacity is very small. Therefore, to support a large number of terminals, multiple frequency points are needed to increase the network capacity.

[0056] NB-IoT supports multi-carrier configuration. Its carriers can be divided into two categories: anchor carrier and non-anchor carrier. At the same time, the same cell can include one anchor carrier and several non-anchor carriers. The spectral bandwidth of each carrier is 180 kHz, and the maximum spectral span of all carriers in the cell does not exceed 20 MHz.

[0057] Anchor carrier: In a multi-carrier cell, there is exactly one carrier that supports simultaneously carrying NPSS, NSSS, narrow-band physical broadcast channel (NPBCH), narrow-band physical downlink control channel (NPDCCH), and narrow-band physical downlink share channel (NPDSCH). This carrier is called the anchor carrier. Therefore, the terminal can monitor NPSS, NSSS, NPBCH, NPDCCH, and NPDSCH information on the anchor carrier.

[0058] Non-anchored Carrier: In a multi-carrier cell, there can be several carriers that only carry NPDCCH and NPDSCH, but do not carry NPSS, NSSS, and NPBCH. This type of carrier is called a non-anchored carrier. Therefore, the terminal can send or receive data on the non-anchored carrier. Additionally, before the terminal enters the connected state, the network will specify a carrier for subsequent downlink data transmission through the message (Msg4) in the random access procedure. When the terminal is in the idle state, the terminal can monitor paging on the non-anchored carrier.

[0059] 2. NTN Communication System

[0060] In an NTN communication system, a satellite usually generates one or more beams (or beam footprints) on the ground, and the shape of a beam on the ground can be elliptical. Among them, the beams generated by some satellites (such as LEO satellites) on the ground will also move on the ground as the satellite moves in its orbit; or, the beams or cells generated by some satellites (such as LEO satellites or GEO satellites) on the ground will not move on the ground as the satellite moves in its orbit.

[0061] Since the distance between the satellite and the ground is very far (for example, the GEO satellite is 35786 km), within the coverage area of the same beam or cell, the propagation distance differences between terminals (such as UEs) at different geographical locations and the satellite are relatively small (that is, the path loss differences of the signals corresponding to terminals at different geographical locations within the coverage area of the same cell are relatively small), which in turn leads to very small differences in the signal reception quality (including the downlink reception quality of the terminal or the uplink reception quality of the base station) corresponding to terminals at different geographical locations within the coverage area of the same beam / cell, as Figure 3 shown.

[0062] In Figure 3 the terrestrial network communication system shown in (a), there are terminals 3201 and 3202 at different geographical locations within the coverage area of the same cell. Since there is a large difference between the propagation distance from the network device 310 to terminal 3201 and the propagation distance to terminal 3202, there is a large difference between the signal reception quality corresponding to terminal 3201 and the signal reception quality corresponding to terminal 3202. While in Figure 3 the NTN communication system shown in (b), there are terminals 3401 and 3402 at different geographical locations within the coverage area of the same beam / cell. Since the distance between the satellite 330 and the ground is very far, the propagation distance differences between the satellite 330 and terminal 3401 and the propagation distance to terminal 3402 are relatively small, resulting in relatively small differences between the signal reception quality corresponding to terminal 3401 and the signal reception quality corresponding to terminal 3402.

[0063] 3. Architecture of NTN Communication System

[0064] In the embodiments of this application, the architecture of the NTN communication system mainly includes an NTN communication architecture with a transparent satellite (or called a bent pipe payload) (i.e., the transparent relay mode) and an NTN communication architecture with a regenerative satellite (i.e., the regenerative signal mode). Please refer to Figure 4 . Among them, Figure 4 example (a) in Figure 4 illustrates the NTN communication architecture with a transparent satellite, while Figure 4 example (b) in Figure 4 illustrates the NTN communication architecture with a regenerative satellite. In

[0065] 4. Duplicate Transmission of Data

[0066] To ensure communication coverage, existing narrow band internet of things (NB-IoT) or enhanced machine-type communication (eMTC) adopt the technology of repeated transmission. Among them, the maximum number of repeated transmissions for downlink transmission is 2048 times, while the maximum number of repeated transmissions for uplink transmission is 128 times. In addition, the number of repeated transmissions of the physical downlink share channel (PDSCH) or the physical uplink share channel (PUSCH) can be dynamically indicated by the downlink control information (DCI) scheduled by it, that is, there is a specific bit field in the DCI to indicate the number of repeated transmissions of the PDSCH or PUSCH. At the same time, the maximum number of repeated transmissions (i.e., Rmax) of the physical downlink control channel (PDCCH) can be semi-statically configured by RRC signaling or the system information block (SIB).

[0067] In a terrestrial network communication system (such as Figure 3 shown), due to the large difference in the propagation distance between the terminals at different geographical locations within the coverage area of the same cell and the base station, when the terminal receives or sends data, terminals located at different geographical locations (such as the cell center or the cell edge) require different numbers of repeated transmissions of data (i.e., the number of repeated transmissions of PDSCH / PUSCH / PRACH / PDCCH). At present, for the problem of the number of repeated transmissions in terrestrial network communication, the network can dynamically indicate the number of repeated transmissions of the PDSCH / PUSCH through a specific bit field in the DCI that schedules the PDSCH / PUSCH.

[0068] Since the satellite in the NTN communication system is very far from the ground and the satellite also moves continuously along a fixed orbit, the propagation distance (i.e., propagation delay) between the terminal and the satellite is often large. If the NTN communication system also considers the repeated transmission technology in the Internet of Things protocol (i.e., the satellite Internet of Things scenario), it may lead to a longer duration of a single data transmission by the terminal. Due to the rapid movement of the satellite, during this data transmission process, the terminal may experience beam (i.e., carrier) switching. Therefore, how to receive the carrier switching indication sent by the network during this data transmission process (i.e., listening to the PDCCH during a single data transmission) is a problem that needs to be solved currently.

[0069] Referring to the above description, the flowchart of a wireless communication method provided by an embodiment of the present application is applicable to a non-terrestrial network communication system. Please refer to Figure 5 . The method includes:

[0070] S510. The network device sends a first DCI to the terminal, and the first DCI carries first indication information.

[0071] The first indication information is used for the terminal to determine whether there are J PDCCH monitoring occasions for listening to the target PDCCH during the repeated transmission of the data scheduled by the first DCI, where J is an integer greater than 1; or, the first indication information is used for the terminal to determine whether to listen to the target PDCCH on the J PDCCH monitoring occasions during the repeated transmission of the data scheduled by the first DCI.

[0072] It should be noted that, in order to ensure the communication coverage, NB-IOT / eMTC adopts the repeated transmission technology. When the repeated transmission technology in the IoT protocol is also considered in the NTN communication system, it may cause a relatively long duration for a single data transmission of the terminal. Due to the fast movement of the satellite, the terminal may switch beams (i.e., carriers) during this data transmission process. Therefore, how to receive the carrier switching indication sent by the network (i.e., listen to the PDCCH during a single data transmission) during this data transmission process is a problem that needs to be solved currently. Therefore, the embodiment of the present application considers that the network device sends a first DCI carrying first indication information to the terminal, so as to realize the indication from the network to the terminal whether there are J monitoring occasions for listening to the target PDCCH during the repeated transmission of the data scheduled by the first DCI; or, realize the indication from the network to the terminal whether to listen to the target PDCCH on the J PDCCH monitoring occasions during the repeated transmission of the data scheduled by the first DCI.

[0073] Furthermore, it should be noted that the technical solution in the embodiment of the present application is applicable to both the transparent forwarding mode and the regenerated signal mode. In the transparent forwarding mode, the first DCI is sent by a network device located on the ground. In the regenerated signal mode, since the network device is located on the satellite, the first DCI is sent by a network device located on the satellite. In addition, the "first DCI" and "second DCI" in the embodiment of the present application are mainly used to distinguish the DCIs sent by the network device at different times, and the indication fields, indication information, etc. carried by the DCIs sent at different times have different control uses, and no specific limitations are made thereto.

[0074] Next, the embodiment of the present application will specifically describe the resource configuration of J PDCCH monitoring occasions. Wherein, J is an integer greater than 1.

[0075] Specifically, the interval between two adjacent PDCCH monitoring opportunities among the J PDCCH monitoring opportunities satisfies one of the following manners: the interval between two adjacent PDCCH monitoring opportunities is K repetition units, the interval between two adjacent PDCCH monitoring opportunities is K sub - frames, the interval between two adjacent PDCCH monitoring opportunities is K time slots, the interval between two adjacent PDCCH monitoring opportunities is K radio resource units (RUs), or the interval between two adjacent PDCCH monitoring opportunities is K milliseconds; the value of K is an integer greater than or equal to 1.

[0076] It can be understood that during the repeated transmission of the data scheduled by the first DCI, the network inserts or configures a PDCCH monitoring opportunity every K repetition units (every K sub - frames, every K time slots, every K RUs, or every K milliseconds), as Figure 6 shown. Among them, each PDCCH monitoring opportunity is used to monitor the target PDCCH.

[0077] Among them, the value of K is configured by the network device through RRC signaling or SIB.

[0078] Specifically, the duration of the PDCCH monitoring opportunity is configured by the network device through RRC signaling or SIB.

[0079] Specifically, the duration of the PDCCH monitoring opportunity is configured by the network device for each carrier separately.

[0080] It should be noted that the satellite in the NTN communication system will generate one or more beams on the ground to form a cell, and the terminal located in the cell can be within the coverage of any one of all the beams in the cell. Therefore, the embodiments of the present application consider that different beams correspond to different durations of PDCCH monitoring opportunities.

[0081] Specifically, the duration of the PDCCH monitoring opportunity can be applied to all carriers in a cell.

[0082] It should be noted that the durations of the PDCCHs of all beams in the cell are the same. Specifically, the unit of the duration of the PDCCH monitoring opportunity can be sub - frame, frame, time slot, millisecond, etc., and no specific limitation is made thereto.

[0083] Next, the embodiments of the present application will specifically describe the first indication information.

[0084] Specifically, the first indication information can be an indication field carried by the first DCI. Additionally, this indication field can be a newly added or specific field in the DCI specified by the existing standard.

[0085] Specifically, the first indication information can be used to indicate whether there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; or, the first indication information can be used to indicate whether the terminal monitors the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0086] It should be noted that, regarding whether there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, it can be understood as whether the network inserts or configures J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI. Additionally, regarding whether to monitor the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, it can be understood that the network has inserted or configured J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI. At this time, the network sends the first indication information to indicate whether the terminal needs to monitor the target PDCCH on these J PDCCH monitoring opportunities.

[0087] Furthermore, it should be noted that, regarding whether there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, it can also be understood that when scheduling data through the first DCI, the network device can use the first indication information in the first DCI to indicate to the terminal whether the configuration for the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by this first DCI takes effect. That is to say, whether the interval K between the above two adjacent PDCCH monitoring opportunities and the duration of each PDCCH monitoring opportunity take effect.

[0088] Among them, the length of the first indication information can be 1 bit.

[0089] It should be noted that the length of the first indication information in the first DCI sent by the network device to the terminal can be 1 bit. At this time, the first indication information can be a 1-bit information, and the value-taking methods of the 1-bit bit include 1 and 0. Additionally, after the terminal obtains the first indication information in the first DCI from the network device, the terminal can determine whether there are J PDCCH monitoring opportunities for monitoring the target PDCCH during the repeated transmission of the data scheduled by the first DCI through the value-taking method of the bit in the first indication information, or the terminal can determine whether to monitor the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI through the value-taking method of the bit in the first indication information. The following gives an example for illustration.

[0090] An example is described. The network device schedules a data transmission through a first DCI, and carries 1-bit information in the first DCI. The 1-bit indication is used to indicate whether there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI. If the value of the bit in the 1-bit information is 1, the 1-bit information is used to indicate that there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI (i.e., the configuration for the J PDCCH monitoring opportunities takes effect), as shown in Figure 7 shown; if the value of the bit in the 1-bit information is 0, the 1-bit information is used to indicate that there are no J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI (i.e., the configuration for the J PDCCH monitoring opportunities does not take effect), as shown in Figure 8 shown. Alternatively, if the value of the bit in the 1-bit information is 0, the 1-bit information is used to indicate that there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; if the value of the bit in the 1-bit information is 1, the 1-bit information is used to indicate that there are no J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI. There is no specific restriction on this.

[0091] An example is described. The network device schedules a data transmission through a first DCI, and carries 1-bit information in the first DCI. The 1-bit indication is used to indicate whether the terminal monitors the target PDCCH on J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI. If the value of the bit in the 1-bit information is 1, the 1-bit information is used to indicate that the terminal monitors the target PDCCH on J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, as shown in Figure 9 shown; if the value of the bit in the 1-bit information is 0, the 1-bit information is used to indicate that the terminal monitors the target PDCCH on J PDCCH non-monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, as shown in Figure 10 shown. Alternatively, if the value of the bit in the 1-bit information is 0, the 1-bit information is used to indicate that the terminal monitors the target PDCCH on J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; if the value of the bit in the 1-bit information is 1, the 1-bit information is used to indicate that the terminal does not monitor the target PDCCH on J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI. There is no specific restriction on this.

[0092] In summary, in the embodiment of the present application, the first indication information carried by the first DCI is used to flexibly configure J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, so as to ensure the flexibility of the NTN communication system when the NTN communication system also considers the repeated transmission technology in the Internet of Things protocol.

[0093] Next, the embodiment of the present application will specifically describe the role of the target PDCCH.

[0094] Since satellites in the NTN communication system usually generate one or more beams on the ground to form a cell, and a terminal located in the cell can be within the coverage of any one of all the beams in the cell, as the satellite moves along a fixed orbit, the beams generated by the satellite on the ground will also move on the ground with the movement of the satellite. To ensure that the communication connection between the terminal and the satellite is not interrupted, the terminal may need to perform beam switching frequently. Among them, beam switching can manage beams by means of carrier switching, that is, each beam in all the beams in the cell corresponds to one or more carriers (that is, one carrier corresponds to one beam), and beam switching is achieved through carrier switching.

[0095] In addition, the present application considers the scenario where the NTN communication system combines the repeated transmission technology in the Internet of Things protocol. Since there may be a phenomenon that the repeated transmission of a piece of data between the terminal and the satellite lasts for a long time in this scenario, there may also be a problem of carrier switching during the repeated transmission of this piece of data.

[0096] For the problem of possible carrier switching during the repeated transmission of a piece of data scheduled by the DCI, the present application can consider the following two methods: One method is that the network ensures that the scheduled data can be transmitted completely on the current carrier (the carrier transmitting the DCI) when scheduling data through the DCI (i.e., the scheduling DCI), but this method will severely limit the network scheduling; Another method is to support cross-carrier scheduling. However, in order for the NTN communication system to support cross-carrier scheduling, it is necessary to design a new indication field or indication information for the DCI to indicate whether cross-carrier switching occurs.

[0097] Combined with the above description, the embodiment of the present application considers inserting or configuring J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, and monitoring the target PDCCH carrying the second indication information in the second DCI within the J PDCCH monitoring opportunities, so as to solve the cross-carrier problem during the repeated transmission of the data scheduled by the first DCI through the second indication information, and achieve the purpose of performing cross-carrier switching during the repeated transmission of a piece of data. The following is a specific description thereof.

[0098] Specifically, the target PDCCH is used to carry the second DCI.

[0099] It should be noted that since the PDCCH channel can carry scheduling DCI or non-scheduling DCI, the embodiments of the present application consider that the target PDCCH monitored by the terminal at J PDCCH monitoring opportunities carries the second DCI.

[0100] Furthermore, the second DCI carries second indication information, and the second indication information is used to indicate whether to perform carrier switching during the retransmission period of the data scheduled by the first DCI.

[0101] It should be noted that since the retransmission of the data scheduled by the first DCI may last for a long time, there may also be a situation of carrier switching during the retransmission period of the data. Therefore, in combination with the above description, when the J PDCCH monitoring opportunities exist during the retransmission period of the data scheduled by the first DCI, if the terminal monitors the target PDCCH at the J PDCCH monitoring opportunities, it means that the target PDCCH itself also exists during the retransmission period of the data scheduled by the first DCI. At this time, when the terminal receives the second indication information in the second DCI carried by the target PDCCH within the J PDCCH monitoring opportunities, the terminal can determine whether to perform carrier switching during the retransmission period of the data scheduled by the first DCI according to the second indication information.

[0102] Among them, the second indication information may be an indication field carried by the second DCI. In addition, the indication field may be a newly added or specific field in the DCI specified by the existing standard.

[0103] Next, the embodiments of the present application will specifically describe how the second indication information is used to indicate whether to perform carrier switching during the retransmission period of the data scheduled by the first DCI.

[0104] In a possible example, the second indication information is specifically used to indicate whether to switch from the current carrier to the target carrier to retransmit the data during the retransmission period of the data scheduled by the first DCI.

[0105] Among them, the current carrier is the carrier used to transmit the first DCI and the second DCI, and the index of the target carrier is indicated by the second DCI.

[0106] It should be noted that the terminal can determine the target carrier through the index of the target carrier indicated by the second DCI, so as to achieve the configuration or indication of the target carrier to be switched from the network to the terminal during the retransmission period of the data scheduled by the first DCI.

[0107] It should be further noted that since the distance between the satellite and the ground is very far, even if the terminal is in continuous motion (i.e., the position of the terminal is constantly changing) for a period of time, the propagation distance between the terminal and the satellite changes little. That is to say, compared with the motion change of the satellite, the motion change of the terminal is small. Based on this, the embodiments of the present application consider approximating the current position of the terminal as fixed for a period of time, and mainly analyzing the situation of beam switching caused by the continuous motion of the satellite.

[0108] To solve the beam switching problem in the NTN communication system, the embodiments of the present application consider performing beam management for beam switching in the form of carrier switching, that is, each beam in all beams in the cell corresponds to one or more carriers (i.e., one carrier corresponds to one beam), and beam switching is achieved through carrier switching. For this purpose, the embodiments of the present application consider that the terminal obtains the second indication information in the second DCI by listening to the target PDCCH, and then the terminal determines whether to switch from the current carrier to the target carrier to retransmit the data during the retransmission period of the data scheduled by the first DCI according to the second indication information, so as to achieve beam switching management (i.e., whether to switch from the beam corresponding to the current carrier to the beam corresponding to the target carrier) through carrier switching management (i.e., whether to switch from the current carrier to the target carrier), which is beneficial to avoiding the interruption of NTN network communication caused by the motion of the satellite and improving the reliability of NTN network communication.

[0109] Furthermore, the current carrier and the target carrier each correspond to different beams. Wherein, the beam is a beam among all beams in the serving cell where the terminal is located.

[0110] It should be noted that based on the above, the satellite in the NTN communication system will generate one or more beams on the ground to form a cell, and the terminal located in the cell can be within the coverage range of any beam among all beams in the cell. At this time, this cell is called the serving cell where the terminal is located.

[0111] Specifically, the second indication information can be 1-bit information or X-bit information, where X is an integer greater than 1; among them, the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by the value of the bit, or the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by the bit flip; the X-bit information can be used to determine whether to switch from the current carrier to the target carrier by bit encoding.

[0112] Wherein, the value of X can be configured by the network device through RRC dedicated signaling.

[0113] It should be noted that the length of the second indication information in the second DCI obtained by the terminal listening to the target PDCCH can be 1 bit or X bits. Among them, when the length of the second indication information is 1 bit, the second indication information can be referred to as 1-bit information, and the value-taking method of the bit of the 1-bit information includes 1 and 0, or the bit-flipping method of the bit of the 1-bit information includes bit-flipping (such as 1 being converted to 0, 0 being converted to 1) and non-bit-flipping.

[0114] When the length of the second indication information is X bits, the second indication information can be referred to as X-bit information, and the bit-encoding method of the X-bit information includes any encoding combination of X bits. For example, when X is 2, the bit-encoding method of 2-bit information includes 00, 01, 10, and 11.

[0115] Therefore, after the terminal obtains the second indication information, the terminal can determine whether to switch from the current carrier to the target carrier through the value-taking method of the bits in the second indication information; or, the terminal can determine whether to switch from the current carrier to the target carrier through the bit-flipping method of the bits in the second indication information; or, the terminal can determine whether to switch from the current carrier to the target carrier through the bit-encoding method in the X-bit information. The following is an example for illustration.

[0116] Example illustration: The terminal listens to the target PDCCH to obtain the 1-bit information in the second DCI. If the value of the bit in the 1-bit information is 1, the 1-bit information is used to indicate that the terminal switches from the current carrier to the target carrier during the retransmission period of the data scheduled by the first DCI to retransmit the data; if the value of the bit in the 1-bit information is 0, the 1-bit information is used to indicate that the terminal retransmits the data on the current carrier during the retransmission period of the data scheduled by the first DCI without performing carrier switching. Or, if the value of the bit in the 1-bit information is 0, the 1-bit information is used to indicate that the terminal switches from the current carrier to the target carrier during the retransmission period of the data scheduled by the first DCI to retransmit the data; if the value of the bit in the 1-bit information is 1, the 1-bit information is used to indicate that the terminal retransmits the data on the current carrier during the retransmission period of the data scheduled by the first DCI without performing carrier switching.

[0117] An example is described as follows. The terminal monitors the target PDCCH to obtain the 1-bit information in the second DCI. If the bit in the 1-bit information is flipped (e.g., 1 is converted to 0, or 0 is converted to 1), the 1-bit information is used to indicate that the terminal switches from the current carrier to the target carrier to retransmit the data during the retransmission period of the data scheduled by the first DCI; if the bit in the 1-bit information is not flipped, the 1-bit information is used to indicate that the terminal retransmits the data by switching from the current carrier during the retransmission period of the data scheduled by the first DCI, without performing carrier switching. Alternatively, if the bit in the 1-bit information is not flipped, the 1-bit information is used to indicate that the terminal switches from the current carrier to the target carrier to retransmit the data during the retransmission period of the data scheduled by the first DCI; if the bit in the 1-bit information is flipped, the 1-bit information is used to indicate that the terminal retransmits the data by switching from the current carrier during the retransmission period of the data scheduled by the first DCI, without performing carrier switching.

[0118] An example is described as follows. The terminal monitors the target PDCCH to obtain the 2-bit information in the second DCI. If the bit encoding mode in the 2-bit information is 00, the 2-bit information is used to indicate that the terminal retransmits the data by switching from the current carrier during the retransmission period of the data scheduled by the first DCI, without performing carrier switching; if the bit encoding mode in the 2-bit information is not 00 (e.g., 01, 10, or 11), the 2-bit information is used to indicate that the terminal switches from the current carrier to the target carrier to retransmit the data during the retransmission period of the data scheduled by the first DCI.

[0119] S520. The terminal obtains the first DCI from the network device.

[0120] Combined with the above description, in the following embodiments of the present application, how the terminal determines the target carrier based on the index of the target carrier indicated by the second DCI will be specifically described.

[0121] Specifically, the second DCI further carries third indication information, and the third indication information is used to indicate the index of the target carrier.

[0122] It should be noted that in the embodiments of the present application, it is considered that the second DCI carries the second indication information and the third indication information, and the terminal can determine the target carrier based on the index of the target carrier indicated by the third indication information, so as to implement the configuration or indication of the target carrier to be switched from the network to the terminal during the retransmission period of the data scheduled by the first DCI.

[0123] Further, the index of the target carrier is within the carrier index set information.

[0124] Among them, the carrier index set information includes the indexes of M carriers and a candidate carrier index set associated with each carrier index among the indexes of the M carriers. The indexes of the M carriers include the index of the current carrier, and the index of the target carrier is specifically in the candidate carrier index set associated with the index of the current carrier; the index of each carrier in the carrier index set information corresponds to a beam, and M is an integer greater than 1; the candidate carrier index set is composed of the indexes of N carriers among the indexes of the M carriers, and N is less than or equal to M.

[0125] Further, the carrier index set information can be configured by the network device through RRC dedicated signaling; or, the carrier index set information is pre-configured.

[0126] It should be noted that the embodiments of this application consider configuring the indexes of M carriers and a candidate carrier index set associated with each carrier index among the indexes of the M carriers for the terminal, that is, the carrier index set information. Among them, there is no arrangement order among the carrier indexes in the indexes of the M carriers and among the carrier indexes in the candidate carrier index set. Then, the network device can transmit the first DCI to the terminal through a certain carrier (i.e., the current carrier). Finally, the terminal obtains the second DCI by listening to the target PDCCH. In addition, since each carrier index in the carrier index set information is associated with a candidate carrier index set, and the index of the target carrier is specifically in the candidate carrier index set associated with the index of the current carrier, it is necessary to consider the carrier indexes in the candidate carrier index set associated with the index of the current carrier.

[0127] Next, the embodiments of this application will specifically introduce how to determine the indexes of the M carriers and the indexes of the N carriers in the candidate carrier index set.

[0128] Specifically, the carrier index set information can satisfy at least one of the following methods: the indexes of the M carriers in the carrier index set information are determined by the current location information of the terminal and a preset satellite ephemeris table, and the indexes of the N carriers in the candidate carrier index set in the carrier index set information are determined by the distribution of the beams corresponding to the indexes of the M carriers.

[0129] It should be noted that the terminal can calculate the current location information through its own global navigation satellite system (GNSS) and then send it to the network device. Then, the network device can determine the indexes of the M carriers in the carrier index set information according to the current location information of the terminal and the preset satellite ephemeris table, so as to establish a mapping relationship between the current location of the terminal and the operating trajectory of the satellite and the carrier indexes in the carrier index set information.

[0130] In addition, there is a beam distribution among one or more beams generated by a satellite in the NTN communication system on the ground, and this beam distribution is called a beam ground distribution map. Therefore, the embodiments of this application consider that the network device determines the carrier indexes within the set of candidate carrier indexes associated with the indexes of M carriers according to the distribution of the beams corresponding to the indexes of the M carriers.

[0131] Specifically, the indexes of N carriers are determined by the distribution of the beams corresponding to the indexes of M carriers, and it may specifically include the following steps: Determine the respective adjacent beams of the beams corresponding to the indexes of M carriers, and form the indexes of N carriers from the carriers corresponding to the respective adjacent beams. The following is a specific example for illustration.

[0132] Example illustration, in Figure 11 Satellite 1110 sequentially generates 10 beams on the ground along a fixed operating trajectory, and each of the 10 beams corresponds to a carrier, that is, 10 carriers. At this time, the current position of the terminal 1120 is in the area corresponding to the carrier index C3, so the communication between the satellite 1110 and the terminal 1120 is carried out through the carrier index C3 (i.e., the index of the current carrier). Then, the network device determines the set of carrier indexes {C3, C4, C5, C6, C7, C8, C9} and the set of candidate carrier indexes associated with each carrier index in the set of carrier indexes (i.e., the carrier index set information) according to the current position information of the terminal 1120 and the preset satellite ephemeris. Among them, since the adjacent carrier indexes of the beam corresponding to the carrier index C3 are the carrier indexes C0, C1, C2, C4, C5, and C6, and the satellite 1110 will operate along the "satellite movement direction" shown in the figure, the set of candidate carrier indexes associated with the carrier index C3 is {C4, C5, C6}. Similarly, the set of candidate carrier indexes associated with the carrier index C4 is {C5, C9}, the set of candidate carrier indexes associated with the carrier index C5 is {C7, C8, C9}, and so on. Finally, the network device sends the set of carrier indexes and the set of candidate carrier indexes associated with each carrier index in the set of carrier indexes to the terminal through RRC dedicated signaling.

[0133] Next, the embodiments of this application will further introduce the third indication information.

[0134] Specifically, the third indication information may be Y-bit information, and the value of Y is an integer greater than 1. Among them, the Y-bit information may be used to indicate the index of the target carrier through bit encoding.

[0135] Furthermore, the value of Y may be configured by the network device through RRC dedicated signaling.

[0136] It should be noted that when the length of the third indication information is Y bits, the third indication information can be referred to as Y-bit information, and the bit encoding method of the Y bits includes any encoding combination of the Y bits. For example, when Y is 2, the bit encoding methods of 2 bits include 00, 01, 10, and 11. Therefore, the terminal can indicate the index of the target carrier through the bit encoding method in the Y-bit information.

[0137] Furthermore, the value of Y satisfies at least one of the following methods: the value of Y is determined by the number of carrier indices in the candidate carrier index set associated with the index of the current carrier, and the value of Y has a mapping relationship with the value of N.

[0138] It can be understood that the network device can configure the value of Y through the number of carrier indices in the candidate carrier index set in the carrier index set information, so as to realize that the network configures the Y-bit information to indicate the index of the target carrier, avoiding excessive signaling overhead. At the same time, there may be reserved bits in the Y-bit information. For example, if the number of carrier indices in the candidate carrier index set associated with the index of the current carrier is 3, the value of Y can be 2; if the number of carrier indices in the candidate carrier index set associated with the index of the current carrier is 5, the value of Y can be 3. At this time, there may be reserved bits in the 3-bit information. The following combines the second indication information, the third indication information and Figure 11 to give an example.

[0139] Example illustration: First, the network device sends the carrier index set {C3, C4, C5, C6, C7, C8, C9} and the candidate carrier index set associated with each carrier index in the carrier index set to the terminal through RRC dedicated signaling. Among them, the carrier corresponding to the carrier index C3 is the carrier for transmitting the first DCI and the second DCI (that is, the current carrier is the carrier corresponding to the carrier index C3), and the candidate carrier index set associated with the carrier index C3 is {C4, C5, C6}.

[0140] Secondly, the terminal listens to the target PDCCH to obtain the second indication information and the third indication information in the second DCI. Among them, the second indication information is 1-bit information, and the third indication information is 2-bit information.

[0141] Again, the value of the bit in the 1-bit information is 1. Therefore, this 1-bit information is used to indicate that the terminal switches from the current carrier to the target carrier during the repeated transmission of the data scheduled by the first DCI to repeat the transmission of the data. At the same time, this 2-bit information is used to indicate the index of the target carrier by means of bit encoding. Among them, if the bit encoding method in the 2-bit information is 00, this 2-bit information is used to indicate the first carrier index (i.e., C4) in the candidate carrier index set {C4, C5, C6} associated with the carrier index C3; if the bit encoding method in the 2-bit information is 01, this 2-bit information is used to indicate the second carrier index (i.e., C5) in the candidate carrier index set {C4, C5, C6} associated with the carrier index C3; if the bit encoding method in the 2-bit information is 10, this 2-bit information is used to indicate the third carrier index (i.e., C6) in the candidate carrier index set {C4, C5, C6} associated with the carrier index C3; if the bit encoding method in the 2-bit information is 11, this 2-bit information is used as a reserved bit.

[0142] Finally, when this 2-bit information is used to indicate the first carrier index in the candidate carrier index set {C4, C5, C6}, the index of the target carrier is the carrier index C4. At this time, the current carrier is the carrier corresponding to the carrier index C3, and the target carrier is the index corresponding to the carrier index C4.

[0143] It can be seen that by using the second indication information in the second DCI to indicate whether to switch from the current carrier to the target carrier to repeat the transmission of the data during the repeated transmission of the data scheduled by the first DCI, and by using the third indication information in the second DCI to indicate the index of the target carrier, cross-carrier data transmission during the repeated transmission of the data scheduled by the first DCI is realized.

[0144] S530. The terminal determines whether there are J PDCCH monitoring opportunities for monitoring the target PDCCH during the repeated transmission of the data scheduled by the first DCI according to the first indication information; or determines whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI according to the first indication information.

[0145] It can be seen that in the embodiments of the present application, when the NTN communication system also considers the retransmission technology in the Internet of Things protocol, since the retransmission of data between the terminal and the satellite may last for a relatively long time, the embodiments of the present application consider that the network device sends a first DCI carrying first indication information to the terminal, which is beneficial to indicating by the network to the terminal whether there are J listening opportunities for listening to the target PDCCH during the retransmission of the data scheduled by the first DCI; or, indicating by the network to the terminal whether to listen to the target PDCCH on the J PDCCH listening opportunities during the retransmission of the data scheduled by the first DCI, and is beneficial to ensuring the rationality and flexibility of the PDCCH listening opportunity configuration process during the retransmission of one-time data in the non-terrestrial network communication system.

[0146] The above mainly introduces the solutions of the embodiments of the present application from the perspective of the interaction between various network elements on the method side. It can be understood that in order for the terminal or the network device to implement the above functions, it includes the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraint conditions of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0147] The embodiments of the present application can perform function unit division on the terminal or the network device according to the above method examples. For example, each function unit can be divided corresponding to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiments of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0148] In the case of adopting an integrated unit, Figure 12 A block diagram of the functional units of a wireless communication device is provided. The wireless communication device 1200 is applied to a terminal in a non-terrestrial network communication system, and specifically includes: a processing unit 1202 and a communication unit 1203. The processing unit 1202 is used to control and manage the actions of the terminal. For example, the processing unit 1202 is used to support the terminal to execute Figure 5The steps in and other processes for the technical solutions described in this application. The communication unit 1203 is used to support the communication between the terminal and other devices in the non-terrestrial network communication system. The wireless communication device 1200 may further include a storage unit 1201 for storing the program code and data of the terminal.

[0149] Among them, the processing unit 1202 may be a processor or a controller. For example, it may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosure of this application. The processing unit 1202 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 1203 may be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 1201 may be a memory. When the processing unit 1202 is a processor, the communication unit 1203 is a communication interface, and the storage unit 1201 is a memory, the wireless communication device 1200 involved in the embodiments of this application may be Figure 14 the terminal shown.

[0150] In specific implementation, the processing unit 1202 is used to execute any step performed by the terminal in the above method embodiments, and when performing data transmission such as sending, it can optionally call the communication unit 1203 to complete the corresponding operation. The following is a specific description.

[0151] The processing unit 1202 is used to: obtain first downlink control information DCI from a network device, where the first DCI carries first indication information; determine, according to the first indication information, whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or determine, according to the first indication information, whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0152] It should be noted that Figure 12 The specific implementation of each operation in the above embodiments can be seen in the description in the above Figure 5 shown method embodiments, and will not be specifically described here.

[0153] It can be seen that in the embodiments of the present application, when the NTN communication system also considers the retransmission technology in the Internet of Things protocol, since the retransmission of data between the terminal and the satellite may have a relatively long duration, the embodiments of the present application consider that the network device sends the first DCI carrying the first indication information to the terminal, which is conducive to indicating by the network to the terminal whether there are J listening opportunities for listening to the target PDCCH during the retransmission of the data scheduled by the first DCI; or, indicating by the network to the terminal whether to listen to the target PDCCH on the J PDCCH listening opportunities during the retransmission of the data scheduled by the first DCI, and is conducive to ensuring the rationality and flexibility of the PDCCH listening opportunity configuration process during the retransmission of one-time data in the non-terrestrial network communication system.

[0154] In a possible example, the interval between two adjacent PDCCH listening opportunities among the J PDCCH listening opportunities satisfies one of the following manners: the interval between two adjacent PDCCH listening opportunities is K repetition units, the interval between two adjacent PDCCH listening opportunities is K subframes, the interval between two adjacent PDCCH listening opportunities is K time slots, the interval between two adjacent PDCCH listening opportunities is K radio resource units, the interval between two adjacent PDCCH listening opportunities is K milliseconds; the value of K is an integer greater than or equal to 1.

[0155] In a possible example, the value of K is configured by the network device through radio resource control (RRC) signaling or a system information block (SIB).

[0156] In a possible example, the duration of the PDCCH listening opportunity is configured by the network device through RRC signaling or SIB.

[0157] In a possible example, the duration of the PDCCH listening opportunity is configured separately by the network device for each carrier.

[0158] In a possible example, the duration of the PDCCH listening opportunity is applied to all carriers in a cell.

[0159] In a possible example, the first indication information is used to indicate whether there are J PDCCH listening opportunities during the retransmission of the data scheduled by the first DCI; or, the first indication information is used to indicate whether the terminal listens to the target PDCCH on the J PDCCH listening opportunities during the retransmission of the data scheduled by the first DCI.

[0160] In a possible example, the target PDCCH is used to carry the second DCI.

[0161] In a possible example, the second DCI carries second indication information, and the second indication information is used to indicate whether to perform carrier switching during the retransmission of the data scheduled by the first DCI.

[0162] In a possible example, the first indication information is specifically used to indicate whether to switch from the current carrier to the target carrier to retransmit the data during the retransmission of the data scheduled by the first DCI; the current carrier is the carrier used to transmit the first DCI, and the index of the target carrier is indicated by the second DCI.

[0163] In a possible example, the current carrier and the target carrier each correspond to different beams.

[0164] In a possible example, the second indication information may be 1-bit information or X-bit information, where X is an integer greater than 1; among them, the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by the value of the bit, or the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by the bit flip method; the X-bit information can be used to determine whether to switch from the current carrier to the target carrier by the bit encoding method.

[0165] In a possible example, the value of X can be configured by the network device through RRC dedicated signaling.

[0166] In a possible example, the second DCI also carries third indication information, and the third indication information is used to indicate the index of the target carrier.

[0167] In a possible example, the index of the target carrier is in the carrier index set information; the carrier index set information includes the indexes of M carriers and a candidate carrier index set associated with each carrier index in the indexes of the M carriers. The indexes of the M carriers include the index of the current carrier, and the index of the target carrier is specifically in the candidate carrier index set associated with the index of the current carrier; the index of each carrier in the carrier index set information corresponds to a beam, and the value of M is an integer greater than 1; the candidate carrier index set is composed of the indexes of N carriers in the indexes of the M carriers, and the value of N is less than or equal to the value of M.

[0168] In a possible example, the carrier index set information can be configured by the network device through RRC dedicated signaling; or, the carrier index set information is pre-configured.

[0169] In a possible example, the carrier index set information can meet at least one of the following ways: the indexes of M carriers in the carrier index set information are determined by the current location information of the terminal and a preset satellite ephemeris, and the indexes of N carriers in the candidate carrier index set in the carrier index set information are determined by the distribution of the beams corresponding to the indexes of the M carriers.

[0170] In a possible example, the third indication information is Y-bit information, and the value of Y is an integer greater than 1; the Y-bit information is used to indicate the index of the target carrier by means of bit encoding.

[0171] In a possible example, the value of Y can be configured by the network device through RRC dedicated signaling.

[0172] In a possible example, the value of Y meets at least one of the following ways: the value of Y is determined by the number of carrier indexes in the candidate carrier index set associated with the index of the current carrier, and the value of Y has a mapping relationship with the value of N.

[0173] In the case of adopting an integrated unit, Figure 13 A block diagram of the functional units of another wireless communication device is provided. The wireless communication device 1300 is applied to a network device in a non-terrestrial network communication system, and specifically includes: a processing unit 1302 and a communication unit 1303. The processing unit 1302 is used to control and manage the actions of the network device. For example, the processing unit 1302 is used to support the network device to execute Figure 5 the steps therein and other processes for the technical solutions described in this application. The communication unit 1303 is used to support the communication between the network device and other devices in the non-terrestrial network communication system. The wireless communication device 1300 may further include a storage unit 1301 for storing the program code and data of the network device.

[0174] Among them, the processing unit 1302 may be a processor or a controller. For example, it may be a CPU, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in combination with the disclosure of this application. The processing unit 1302 may also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 1303 may be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 1301 may be a memory. When the processing unit 1302 is a processor, the communication unit 1303 is a communication interface, and the storage unit 1301 is a memory, the wireless communication device 1300 involved in the embodiments of this application may be Figure 15 the network device shown.

[0175] In specific implementation, the processing unit 1302 is configured to execute any step performed by the network device in the foregoing method embodiments. When performing data transmission such as sending, the communication unit 1303 may be optionally called to complete the corresponding operation. The following is a detailed description.

[0176] The processing unit 1302 is configured to: send first downlink control information DCI to a terminal, where the first DCI carries first indication information; the first indication information is used to determine whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of data scheduled by the first DCI, and the value of J is an integer greater than 1; or, the first indication information is used to determine whether to monitor the target PDCCH at J PDCCH monitoring opportunities during the repeated transmission of data scheduled by the first DCI.

[0177] It should be noted that Figure 13 For the specific implementation of each operation in the foregoing embodiment, reference may be made to the description in the foregoing method embodiment shown above, and details are not described herein again. Figure 5

[0178] It can be seen that in the embodiment of the present application, in the case where the NTN communication system also considers the repeated transmission technology in the Internet of Things protocol, since the repeated transmission of data between the terminal and the satellite will have a relatively long duration, the embodiment of the present application considers sending the first DCI carrying the first indication information from the network device to the terminal, which is beneficial to implementing the indication from the network to the terminal whether there are J monitoring opportunities for monitoring the target PDCCH during the repeated transmission of data scheduled by the first DCI; or, implementing the indication from the network to the terminal whether to monitor the target PDCCH at J PDCCH monitoring opportunities during the repeated transmission of data scheduled by the first DCI, and is beneficial to ensuring the rationality and flexibility of the PDCCH monitoring opportunity configuration process during the repeated transmission of one piece of data in the non-terrestrial network communication system.

[0179] In a possible example, the interval between two adjacent PDCCH monitoring opportunities among the J PDCCH monitoring opportunities satisfies one of the following manners: the interval between two adjacent PDCCH monitoring opportunities is K repetition units, the interval between two adjacent PDCCH monitoring opportunities is K subframes, the interval between two adjacent PDCCH monitoring opportunities is K time slots, the interval between two adjacent PDCCH monitoring opportunities is K radio resource units, the interval between two adjacent PDCCH monitoring opportunities is K milliseconds; the value of K is an integer greater than or equal to 1.

[0180] In a possible example, the value of K is configured by the network device through radio resource control RRC signaling or a system information block SIB.

[0181] In a possible example, the duration of the PDCCH monitoring occasion is configured by the network device through RRC signaling or SIB.

[0182] In a possible example, the duration of the PDCCH monitoring occasion is configured separately by the network device for each carrier.

[0183] In a possible example, the duration of the PDCCH monitoring occasion is applied to all carriers within a cell.

[0184] In a possible example, the first indication information is used to indicate whether there are J PDCCH monitoring occasions during the repeated transmission of the data scheduled by the first DCI; or, the first indication information is used to indicate whether the terminal monitors the target PDCCH on the J PDCCH monitoring occasions during the repeated transmission of the data scheduled by the first DCI.

[0185] In a possible example, the target PDCCH is used to carry the second DCI.

[0186] In a possible example, the second DCI carries second indication information, and the second indication information is used to indicate whether to perform carrier switching during the repeated transmission of the data scheduled by the first DCI.

[0187] In a possible example, the first indication information is specifically used to indicate whether to switch from the current carrier to the target carrier to repeat the transmission of the data during the repeated transmission of the data scheduled by the first DCI; the current carrier is the carrier used to transmit the first DCI, and the index of the target carrier is indicated by the second DCI.

[0188] In a possible example, the current carrier and the target carrier each correspond to different beams.

[0189] In a possible example, the second indication information can be 1-bit information or X-bit information, where X is an integer greater than 1; among them, the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by the value of the bit, or the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by bit flipping; the X-bit information can be used to determine whether to switch from the current carrier to the target carrier by bit encoding.

[0190] In a possible example, the value of X can be configured by the network device through RRC dedicated signaling.

[0191] In a possible example, the second DCI also carries third indication information, and the third indication information is used to indicate the index of the target carrier.

[0192] In a possible example, the index of the target carrier is in the carrier index set information; the carrier index set information includes the indexes of M carriers and a candidate carrier index set associated with each carrier index among the indexes of the M carriers. The indexes of the M carriers include the index of the current carrier, and the index of the target carrier is specifically in the candidate carrier index set associated with the index of the current carrier. The index of each carrier in the carrier index set information corresponds to a beam, and M is an integer greater than 1. The candidate carrier index set consists of the indexes of N carriers among the indexes of the M carriers, and the value of N is less than or equal to the value of M.

[0193] In a possible example, the carrier index set information can be configured by the network device through RRC dedicated signaling; or the carrier index set information is pre-configured.

[0194] In a possible example, the carrier index set information can satisfy at least one of the following methods: the indexes of the M carriers in the carrier index set information are determined by the current location information of the terminal and a preset satellite ephemeris table, and the indexes of the N carriers in the candidate carrier index set in the carrier index set information are determined by the distribution of the beams corresponding to the indexes of the M carriers.

[0195] In a possible example, the third indication information is Y-bit information, and the value of Y is an integer greater than 1. The Y-bit information is used to indicate the index of the target carrier through bit encoding.

[0196] In a possible example, the value of Y can be configured by the network device through RRC dedicated signaling.

[0197] In a possible example, the value of Y satisfies at least one of the following methods: the value of Y is determined by the number of carrier indexes in the candidate carrier index set associated with the index of the current carrier, and the value of Y has a mapping relationship with the value of N.

[0198] Please refer to Figure 14 , Figure 14 FIG. is a schematic structural diagram of a terminal provided by an embodiment of the present application. Among them, the terminal 1400 includes a processor 1410, a memory 1420, a communication interface 1430, and at least one communication bus for connecting the processor 1410, the memory 1420, and the communication interface 1430.

[0199] The memory 1420 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a compact disc read-only memory (CD-ROM), and the memory 1420 is used for relevant instructions and data.

[0200] The communication interface 1430 is used for receiving and sending data.

[0201] The processor 1410 can be one or more CPUs. When the processor 1410 is a single CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0202] The processor 1410 in the terminal 1400 is used to read one or more programs 1421 stored in the memory 1420 to perform the following steps: obtaining first downlink control information DCI from a network device, where the first DCI carries first indication information; determining, according to the first indication information, whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or determining, according to the first indication information, whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0203] It should be noted that Figure 14 For the specific implementation of each operation in the above embodiments, reference can be made to the description in the method embodiments shown above Figure 5 and details are not described herein again.

[0204] It can be seen that in the embodiments of the present application, when the NTN communication system also considers the repeated transmission technology in the Internet of Things protocol, since the repeated transmission of data between the terminal and the satellite will have a relatively long duration, the embodiments of the present application consider sending the first DCI carrying the first indication information from the network device to the terminal, which is conducive to the network indicating to the terminal whether there are J monitoring opportunities for monitoring the target PDCCH during the repeated transmission of the data scheduled by the first DCI; or indicating to the terminal whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, and is conducive to ensuring the rationality and flexibility of the PDCCH monitoring opportunity configuration process during the repeated transmission of a single piece of data in the non-terrestrial network communication system.

[0205] In a possible example, the interval between two adjacent PDCCH monitoring opportunities among the J PDCCH monitoring opportunities satisfies one of the following ways: the interval between two adjacent PDCCH monitoring opportunities is K repetition units, the interval between two adjacent PDCCH monitoring opportunities is K subframes, the interval between two adjacent PDCCH monitoring opportunities is K time slots, the interval between two adjacent PDCCH monitoring opportunities is K radio resource units, the interval between two adjacent PDCCH monitoring opportunities is K milliseconds; the value of K is an integer greater than or equal to 1.

[0206] In a possible example, the value of K is configured by the network device through Radio Resource Control (RRC) signaling or System Information Block (SIB).

[0207] In a possible example, the duration of the PDCCH monitoring opportunity is configured by the network device through RRC signaling or SIB.

[0208] In a possible example, the duration of the PDCCH monitoring opportunity is configured separately by the network device for each carrier.

[0209] In a possible example, the duration of the PDCCH monitoring opportunity is applied to all carriers within a cell.

[0210] In a possible example, the first indication information is used to indicate whether there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; or, the first indication information is used to indicate whether the terminal monitors the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0211] In a possible example, the target PDCCH is used to carry the second DCI.

[0212] In a possible example, the second DCI carries second indication information, and the second indication information is used to indicate whether carrier switching is performed during the repeated transmission of the data scheduled by the first DCI.

[0213] In a possible example, the first indication information is specifically used to indicate whether to switch from the current carrier to the target carrier to repeat the transmission of the data during the repeated transmission of the data scheduled by the first DCI; the current carrier is the carrier used to transmit the first DCI, and the index of the target carrier is indicated by the second DCI.

[0214] In a possible example, the current carrier and the target carrier each correspond to different beams.

[0215] In a possible example, the second indication information may be 1-bit information or X-bit information, where X is an integer greater than 1; among them, the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by the value of the bit, or the 1-bit information can be used to determine whether to switch from the current carrier to the target carrier by bit flipping; the X-bit information can be used to determine whether to switch from the current carrier to the target carrier by bit coding.

[0216] In a possible example, the value of X can be configured by the network device through RRC dedicated signaling.

[0217] In a possible example, the second DCI also carries third indication information, and the third indication information is used to indicate the index of the target carrier.

[0218] In a possible example, the index of the target carrier is in the carrier index set information; the carrier index set information includes the indexes of M carriers and a candidate carrier index set associated with each carrier index in the indexes of the M carriers. The indexes of the M carriers include the index of the current carrier, and the index of the target carrier is specifically in the candidate carrier index set associated with the index of the current carrier; the index of each carrier in the carrier index set information corresponds to a beam, and M is an integer greater than 1; the candidate carrier index set is composed of the indexes of N carriers in the indexes of the M carriers, and the value of N is less than or equal to the value of M.

[0219] In a possible example, the carrier index set information can be configured by the network device through RRC dedicated signaling; or the carrier index set information is pre-configured.

[0220] In a possible example, the carrier index set information can satisfy at least one of the following ways: the indexes of the M carriers in the carrier index set information are determined by the current location information of the terminal and a preset satellite ephemeris table, and the indexes of the N carriers in the candidate carrier index set in the carrier index set information are determined by the distribution of the beams corresponding to the indexes of the M carriers.

[0221] In a possible example, the third indication information is Y-bit information, where Y is an integer greater than 1; the Y-bit information is used to indicate the index of the target carrier by bit coding.

[0222] In a possible example, the value of Y can be configured by the network device through RRC dedicated signaling.

[0223] In a possible example, the value of Y satisfies at least one of the following ways: the value of Y is determined by the number of carrier indexes in the candidate carrier index set associated with the index of the current carrier, and the value of Y has a mapping relationship with the value of N.

[0224] Please refer to Figure 15 , Figure 15 which is a schematic structural diagram of a network device provided by an embodiment of the present application. Among them, the network device 1500 includes a processor 1510, a memory 1520, a communication interface 1530, and at least one communication bus for connecting the processor 1510, the memory 1520, and the communication interface 1530.

[0225] The memory 1520 includes, but is not limited to, RAM, ROM, PROM, or CD-ROM, and the memory 1520 is used to store relevant instructions and data.

[0226] The communication interface 1530 is used to receive and send data.

[0227] The processor 1510 may be one or more CPUs. When the processor 1510 is a single CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0228] The processor 1510 in the network device 1500 is used to read one or more programs 1521 stored in the memory 1520 to perform the following steps: sending first downlink control information DCI to the terminal, where the first DCI carries first indication information; the first indication information is used to determine whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, and the value of J is an integer greater than 1; or, the first indication information is used to determine whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0229] It should be noted that Figure 15 For the specific implementation of each operation in the above-mentioned embodiment, reference can be made to the description in the method embodiment shown above Figure 5 and details will not be described herein again.

[0230] It can be seen that in the embodiment of the present application, when the NTN communication system also considers the repeated transmission technology in the Internet of Things protocol, since the repeated transmission of data between the terminal and the satellite will have a long duration, the embodiment of the present application considers sending the first DCI carrying the first indication information from the network device to the terminal, which is beneficial to realizing that the network indicates to the terminal whether there are J monitoring opportunities for monitoring the target PDCCH during the repeated transmission of the data scheduled by the first DCI; or, realizing that the network indicates to the terminal whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI, and is beneficial to ensuring the rationality and flexibility of the PDCCH monitoring opportunity configuration process during the repeated transmission of a piece of data in the non-terrestrial network communication system.

[0231] In a possible example, the interval between two adjacent PDCCH monitoring opportunities among the J PDCCH monitoring opportunities satisfies one of the following manners: the interval between two adjacent PDCCH monitoring opportunities is K repetition units, the interval between two adjacent PDCCH monitoring opportunities is K subframes, the interval between two adjacent PDCCH monitoring opportunities is K time slots, the interval between two adjacent PDCCH monitoring opportunities is K radio resource units, the interval between two adjacent PDCCH monitoring opportunities is K milliseconds; the value of K is an integer greater than or equal to 1.

[0232] In a possible example, the value of K is configured by the network device through radio resource control (RRC) signaling or a system information block (SIB).

[0233] In a possible example, the duration of the PDCCH monitoring opportunity is configured by the network device through RRC signaling or SIB.

[0234] In a possible example, the duration of the PDCCH monitoring opportunity is configured separately by the network device for each carrier.

[0235] In a possible example, the duration of the PDCCH monitoring opportunity is applied to all carriers within a cell.

[0236] In a possible example, the first indication information is used to indicate whether there are J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; or, the first indication information is used to indicate whether the terminal monitors the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

[0237] In a possible example, the target PDCCH is used to carry the second DCI.

[0238] In a possible example, the second DCI carries second indication information, and the second indication information is used to indicate whether carrier switching is performed during the repeated transmission of the data scheduled by the first DCI.

[0239] In a possible example, the first indication information is specifically used to indicate whether to switch from the current carrier to the target carrier to repeat the transmission of the data during the repeated transmission of the data scheduled by the first DCI; the current carrier is the carrier used to transmit the first DCI, and the index of the target carrier is indicated by the second DCI.

[0240] In a possible example, the current carrier and the target carrier each correspond to different beams.

[0241] In a possible example, the second indication information may be 1-bit information or X-bit information, where X is an integer greater than 1; among them, the 1-bit information may be used to determine whether to switch from the current carrier to the target carrier by the bit value method, or the 1-bit information may be used to determine whether to switch from the current carrier to the target carrier by the bit flip method; the X-bit information may be used to determine whether to switch from the current carrier to the target carrier by the bit encoding method.

[0242] In a possible example, the value of X may be configured by the network device through RRC dedicated signaling.

[0243] In a possible example, the second DCI also carries third indication information, and the third indication information is used to indicate the index of the target carrier.

[0244] In a possible example, the index of the target carrier is in the carrier index set information; the carrier index set information includes the indexes of M carriers and a candidate carrier index set associated with each carrier index in the indexes of the M carriers. The indexes of the M carriers include the index of the current carrier, and the index of the target carrier is specifically in the candidate carrier index set associated with the index of the current carrier; the index of each carrier in the carrier index set information corresponds to a beam, and M is an integer greater than 1; the candidate carrier index set is composed of the indexes of N carriers in the indexes of the M carriers, and the value of N is less than or equal to the value of M.

[0245] In a possible example, the carrier index set information may be configured by the network device through RRC dedicated signaling; or the carrier index set information is pre-configured.

[0246] In a possible example, the carrier index set information may satisfy at least one of the following methods: the indexes of the M carriers in the carrier index set information are determined by the current location information of the terminal and a preset satellite ephemeris table, and the indexes of the N carriers in the candidate carrier index set in the carrier index set information are determined by the distribution of the beams corresponding to the indexes of the M carriers.

[0247] In a possible example, the third indication information is Y-bit information, where Y is an integer greater than 1; the Y-bit information is used to indicate the index of the target carrier by the bit encoding method.

[0248] In a possible example, the value of Y may be configured by the network device through RRC dedicated signaling.

[0249] In a possible example, the value of Y satisfies at least one of the following methods: the value of Y is determined by the number of carrier indexes in the candidate carrier index set associated with the index of the current carrier, and the value of Y has a mapping relationship with the value of N.

[0250] An embodiment of this application also provides a chip. The chip includes a processor configured to call and run a computer program from a memory, such that a device installed with the chip performs some or all of the steps described for the terminal or network device in the foregoing method embodiment.

[0251] An embodiment of this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program for electronic data exchange. The computer program causes a computer to perform some or all of the steps described for the terminal or network device in the foregoing method embodiment.

[0252] An embodiment of this application also provides a computer program product. The computer program product includes a computer program that is operable to cause a computer to perform some or all of the steps described for the terminal or network device in the foregoing method embodiment. The computer program product may be a software installation package.

[0253] The steps of the method or algorithm described in the embodiments of this application may be implemented in a hardware manner or by a processor executing software instructions. The software instructions may be composed of corresponding software modules, and the software modules may be stored in a RAM, flash memory, ROM, erasable programmable ROM (EPROM), electrically EPROM (EEPROM), register, hard disk, removable hard disk, CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, enabling the processor to read information from the storage medium and write information to the storage medium. Of course, the storage medium may also be a component of the processor. The processor and the storage medium may be located in an ASIC. Additionally, the ASIC may be located in a terminal or network device. Of course, the processor and the storage medium may also exist as discrete components in a terminal or network device.

[0254] Those skilled in the art should be able to realize that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0255] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the embodiments of the present application. It should be understood that the above description is only the specific embodiments of the embodiments of the present application and is not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A wireless communication method, characterized in that A terminal applied to a non-terrestrial network communication system, the non-terrestrial network communication system including the terminal and a network device; the method includes: Obtain first downlink control information DCI from the network device, the first DCI carrying first indication information; Determine, according to the first indication information, whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or, Determine, according to the first indication information, whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; Wherein, the target PDCCH is used to carry second DCI, the second DCI carrying second indication information, and the second indication information is used to indicate whether to perform carrier switching during the repeated transmission of the data scheduled by the first DCI.

2. The method according to claim 1, wherein The interval between two adjacent PDCCH monitoring opportunities among the J PDCCH monitoring opportunities satisfies one of the following: the interval between two adjacent PDCCH monitoring opportunities is K repetition units, the interval between two adjacent PDCCH monitoring opportunities is K subframes, the interval between two adjacent PDCCH monitoring opportunities is K time slots, the interval between two adjacent PDCCH monitoring opportunities is K radio resource units, the interval between two adjacent PDCCH monitoring opportunities is K milliseconds; the value of K is an integer greater than or equal to 1.

3. The method according to claim 2, wherein The value of K is configured by the network device through radio resource control RRC signaling or a system information block SIB.

4. The method according to claim 1, wherein The duration of the PDCCH monitoring opportunity is configured by the network device through RRC signaling or SIB.

5. The method according to claim 1, wherein The duration of the PDCCH monitoring opportunity is configured by the network device separately for each carrier.

6. The method according to claim 1, characterized in that, The duration of the PDCCH monitoring opportunity is applied to all carriers within a cell.

7. The method according to claim 1, wherein The first indication information is used to indicate whether there are the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; or, The first indication information is used to indicate whether the terminal monitors the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

8. A wireless communication method, characterized in that, A network device applied to a non-terrestrial network communication system, the non-terrestrial network communication system including the network device and a terminal; the method includes: Send first downlink control information DCI to the terminal, the first DCI carrying first indication information; The first indication information is used for the terminal to determine whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or, The first indication information is used for the terminal to determine whether to monitor the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; Wherein, the target PDCCH is used to carry a second DCI, and the second DCI carries second indication information, and the second indication information is used to indicate whether to perform carrier switching during the repeated transmission of the data scheduled by the first DCI.

9. The method according to claim 8, wherein The interval between two adjacent PDCCH monitoring opportunities among the J PDCCH monitoring opportunities satisfies one of the following manners: the interval between two adjacent PDCCH monitoring opportunities is K repetition units, the interval between two adjacent PDCCH monitoring opportunities is K subframes, the interval between two adjacent PDCCH monitoring opportunities is K time slots, the interval between two adjacent PDCCH monitoring opportunities is K radio resource units, the interval between two adjacent PDCCH monitoring opportunities is K milliseconds; the value of K is an integer greater than or equal to 1.

10. The method according to claim 9, characterized in that, The value of K is configured by the network device through radio resource control (RRC) signaling or a system information block (SIB).

11. The method according to claim 8, wherein The duration of the PDCCH monitoring opportunity is configured by the network device through RRC signaling or SIB.

12. The method according to claim 8, wherein The duration of the PDCCH monitoring opportunity is configured by the network device separately for each carrier.

13. The method according to claim 8, wherein The duration of the PDCCH monitoring opportunity is applied to all carriers within a cell.

14. The method according to claim 8, wherein The first indication information is used to indicate whether there are the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; or, The first indication information is used to indicate whether the terminal monitors the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI.

15. A wireless communication device, characterized in that, Applied to a terminal in a non-terrestrial network communication system, the non-terrestrial network communication system includes the terminal and a network device; the apparatus includes a processing unit and a communication unit, and the processing unit is configured to: Obtain, through the communication unit, a first downlink control information (DCI) from the network device, and the first DCI carries first indication information; Determine, according to the first indication information, whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel (PDCCH) during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or determine, according to the first indication information, whether to monitor the target PDCCH on the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; Wherein, the target PDCCH is used to carry a second DCI, and the second DCI carries second indication information, and the second indication information is used to indicate whether to perform carrier switching during the repeated transmission of the data scheduled by the first DCI.

16. A wireless communication device, characterized in that, A network device applied to a non-terrestrial network communication system, the non-terrestrial network communication system including the network device and a terminal; the device includes a processing unit and a communication unit, and the processing unit is configured to: Send first downlink control information DCI to the terminal through the communication unit, the first DCI carrying first indication information; the first indication information is used for the terminal to determine whether there are J PDCCH monitoring opportunities for monitoring a target physical downlink control channel PDCCH during the repeated transmission of the data scheduled by the first DCI, where the value of J is an integer greater than 1; or, the first indication information is used for the terminal to determine whether to monitor the target PDCCH at the J PDCCH monitoring opportunities during the repeated transmission of the data scheduled by the first DCI; Wherein, the target PDCCH is used to carry second DCI, the second DCI carrying second indication information, and the second indication information is used to indicate whether to perform carrier switching during the repeated transmission of the data scheduled by the first DCI.

17. A terminal, characterized in that, Comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, and the one or more programs include instructions for performing the steps in the method according to any one of claims 1-7.

18. A network device, characterized in that, Comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, and the one or more programs include instructions for performing the steps in the method according to any one of claims 8-14.

19. A computer-readable storage medium, characterized in that, It stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of claims 1-7 or 8-14.

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