Method, Terminal Device, and Network Device for Wireless Communication

Abstract

A method, a terminal device, and a network device for wireless communication are provided to facilitate the terminal device to perform wireless communication based on a half-duplex mode in an NTN system with a long transmission delay. The method includes: a first terminal device determines a first resource related to half-duplex communication according to first indication information; wherein, the first resource is used for the first terminal device to perform uplink transmission and / or downlink reception in the NTN.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and more particularly, to a method, a terminal device, and a network device for wireless communication. Background Art

[0002] Some communication systems (e.g., non-terrestrial network (NTN) systems) have relatively large transmission delays. In these communication systems, if a terminal device communicates in a half-duplex mode, the uplink transmission of the terminal device may conflict with the downlink reception, or may also conflict with the transmissions of other terminal devices. Therefore, in these communication systems, how to solve the transmission conflict in the half-duplex mode has become a technical problem that urgently needs to be solved. Summary of the Invention

[0003] This application provides a method, a terminal device, and a network device for wireless communication. The following introduces each aspect involved in the embodiments of this application.

[0004] In a first aspect, a method for wireless communication is provided, including: a first terminal device determines a first resource related to half-duplex communication according to first indication information; wherein, the first resource is used for the first terminal device to perform uplink transmission and / or downlink reception in the NTN.

[0005] In a second aspect, a method for wireless communication is provided, including: a network device sends first indication information to a first terminal device; wherein, the first indication information is used for the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used for the first terminal device to perform uplink transmission and / or downlink reception in the NTN.

[0006] In a third aspect, a terminal device is provided. The terminal device is the first terminal device, and the terminal device includes: a determination unit, configured to determine a first resource related to half-duplex communication according to first indication information; wherein, the first resource is used for the first terminal device to perform uplink transmission and / or downlink reception in the NTN.

[0007] In a fourth aspect, a network device is provided. The network device includes: a sending unit, configured to send first indication information to a first terminal device; wherein, the first indication information is used for the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used for the first terminal device to perform uplink transmission and / or downlink reception in the NTN.

[0008] In a fifth aspect, a communication device is provided, including a memory and a processor. The memory is used to store programs, and the processor is used to call the programs in the memory to execute the method described in the first aspect or the second aspect.

[0009] In a sixth aspect, a device is provided, including a processor for calling a program from a memory to execute the method described in the first aspect or the second aspect.

[0010] In a seventh aspect, a chip is provided, including a processor for calling a program from a memory, such that a device installed with the chip executes the method described in the first aspect or the second aspect.

[0011] In an eighth aspect, a computer-readable storage medium is provided, on which a program is stored, and the program causes a computer to execute the method described in the first aspect or the second aspect.

[0012] In a ninth aspect, a computer program product is provided, including a program that causes a computer to execute the method described in the first aspect or the second aspect.

[0013] In a tenth aspect, a computer program is provided, and the computer program causes a computer to execute the method described in the first aspect or the second aspect.

[0014] The first terminal device in the embodiments of the present application can determine a first resource for half-duplex communication according to first indication information. Among them, the first resource is used for the first terminal device to perform wireless communication in NTN. It can be seen that in the NTN system with a long transmission delay, even if the timing advance between the network device and the first terminal device is not aligned, the first terminal device can perform uplink transmission and / or downlink reception on the resources dedicated to half-duplex, thereby avoiding conflicts with the downlink reception of the first terminal device or the transmission of other terminal devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a wireless communication system to which the embodiments of the present application are applied.

[0016] Figure 2 is an NTN system to which the embodiments of the present application are applied.

[0017] Figure 3 is another NTN system to which the embodiments of the present application are applied.

[0018] Figure 4 is a schematic diagram of two timing methods for scheduling an uplink channel in an NTN system.

[0019] Figure 5 is a schematic flowchart of a method for wireless communication provided by the embodiments of the present application.

[0020] Figure 6 is Figure 5 A schematic flowchart of a possible implementation of the method shown.

[0021] Figure 7 is Figure 5 A schematic diagram of a possible implementation of the method shown.

[0022] Figure 8 is Figure 5 A schematic diagram of another possible implementation of the method shown.

[0023] Figure 9 A schematic diagram of a terminal device provided by an embodiment of the present application.

[0024] Figure 10 A schematic diagram of a network device provided by an embodiment of the present application.

[0025] Figure 11 A schematic diagram of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0026] 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 some, but not all, of the embodiments of the present application. For the embodiments of 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.

[0027] Embodiments of the present application can be applied to various communication systems. For example: Embodiments of the present application can be applied to a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, an advanced long term evolution (LTE-A) system, a new radio (NR) system, an evolved system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a universal mobile telecommunication system (UMTS), a wireless local area networks (WLAN), a wireless fidelity (WiFi), a 5th-generation (5G) communication system. Embodiments of the present application can also be applied to other communication systems, such as future communication systems. The future communication system can be, for example, a 6th-generation (6G) mobile communication system, or a satellite communication system, etc.

[0028] Traditional communication systems support a limited number of connections and are also easy to implement. However, with the development of communication technologies, communication systems can not only support traditional cellular communications but also support one or more other types of communications. For example, a communication system can support one or more of the following communications: device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), enhanced MTC (eMTC), vehicle to vehicle (V2V) communication, and vehicle to everything (V2X) communication, etc. Embodiments of the present application can also be applied to communication systems that support the above communication methods.

[0029] The communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) networking scenario.

[0030] The communication system in the embodiments of the present application can be applied to unlicensed spectrum. This unlicensed spectrum can also be considered as shared spectrum. Alternatively, the communication system in the embodiments of the present application can also be applied to licensed spectrum. This licensed spectrum can also be considered as dedicated spectrum.

[0031] Embodiments of the present application can be applied to an NTN system. As an example, the NTN system can be a 4G-based NTN system, can be an NR-based NTN system, can also be an Internet of Things (IoT)-based NTN system or a narrow band Internet of Things (NB-IoT)-based NTN system.

[0032] A communication system can include one or more terminal devices. The terminal devices mentioned in the embodiments of the present application can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device, etc.

[0033] In some embodiments, the terminal device may be a station (ST) in a WLAN. In some embodiments, the terminal device may be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA) device, handheld device with wireless communication function, computing device, or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a next-generation communication system (such as an NR system), or terminal device in a future-evolved public land mobile network (PLMN) network, etc.

[0034] In some embodiments, the terminal device may be a device that provides voice and / or data connectivity to a user. For example, the terminal device may be a handheld device, in-vehicle device, etc. with wireless connection function. As some specific examples, the terminal device may be a mobile phone, tablet (Pad), laptop, palmtop computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc.

[0035] In some embodiments, the terminal device may be deployed on land. For example, the terminal device may be deployed indoors or outdoors. In some embodiments, the terminal device may be deployed on water, such as on a ship. In some embodiments, the terminal device may be deployed in the air, such as on an airplane, balloon, and satellite.

[0036] In addition to the terminal device, the communication system may further include one or more network devices. The network device in the embodiments of the present application may be a device for communicating with the terminal device, and this network device may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. The base station may generally cover various names in the following, or be replaced with the following names, such as: Node B, evolved Node B (eNB), next generation Node B (gNB), relay station, access point (AP), transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-mode radio (MSR) node, home base station, network controller, access node, wireless node, transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station may also refer to a communication module, a modem or a chip disposed in the foregoing device or apparatus. The base station may also be a mobile switching center and a device that undertakes the base station function in D2D, V2X, M2M communications, a network-side device in a 6G network, a device that undertakes the base station function in a future communication system, etc. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0037] The base station may be fixed or mobile. For example, a helicopter or a drone may be configured to act as a mobile base station, and one or more cells may move according to the position of the mobile base station. In other examples, a helicopter or a drone may be configured to be used as a device for communicating with another base station.

[0038] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may further include an AAU.

[0039] By way of example and not limitation, in the embodiments of the present application, the network device may have mobility characteristics. For example, the network device may be a mobile device. In some embodiments of the present application, the network device may be a satellite or a balloon station. In some embodiments of the present application, the network device may also be a base station disposed at locations such as land or water areas.

[0040] In the embodiments of the present application, the network device may provide services for a cell. The terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or in other words, spectrum resources). The cell may be a cell corresponding to the network device (such as a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. Here, the small cell may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage range and low transmission power, and are suitable for providing high-rate data transmission services.

[0041] Exemplarily, Figure 1 is a schematic diagram of the architecture of a communication system provided in the embodiments of the present application. As Figure 1 shown, the communication system 100 may include a network device 110. The network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located within the coverage area.

[0042] Figure 1 Exemplarily, one network device and two terminal devices are shown. In some embodiments of the present application, the communication system 100 may include multiple network devices and the coverage range of each network device may include other numbers of terminal devices, which is not limited herein.

[0043] Exemplarily, Figure 2 is a schematic diagram of an architecture of the NTN system mentioned above. Figure 2 The shown NTN system 200 uses a satellite 210 as an aerial platform. As Figure 2 shown, the satellite radio access network includes a satellite 210, a service link 220, a feeder link 230, a terminal device 240, a gateway (GW) 250, and a network 260 including a base station and a core network.

[0044] The satellite 210 is a space-based spacecraft. The service link 220 refers to the link between the satellite 210 and the terminal device 240. The feeder link 230 refers to the link between the gateway 250 and the satellite 210. The earth-based gateway 250 connects the satellite 210 to the base station or the core network, depending on the choice of the NTN architecture.

[0045] Figure 2 The NTN architecture shown is the bent pipe transponder architecture. In this architecture, the base station is located on the earth behind the gateway 250, and the satellite 210 acts as a relay. The satellite 210 operates as a repeater to forward the signals of the feeder link 230 to the service link 220, or to forward the signals of the service link 220 to the feeder link 230. That is to say, the satellite 210 does not have the function of a base station, and the communication between the terminal device 240 and the base station in the network 260 needs to pass through the satellite 210 for transit.

[0046] Exemplarily, Figure 3 is another schematic diagram of the NTN system architecture. As Figure 3 shown, the satellite radio access network 300 includes a satellite 310, a service link 320, a feeder link 330, a terminal device 340, a gateway 350, and a network 360. Different from Figure 2 that, there is a base station 312 on the satellite 310, and the network 360 behind the gateway 350 only includes the core network.

[0047] Figure 3 The NTN architecture shown is the regenerative transponder architecture. In this architecture, the satellite 310 carries the base station 312 and can be directly connected to the earth-based core network through the link. The satellite 310 has the function of a base station, and the terminal device 340 can communicate directly with the satellite 310. Therefore, the satellite 310 can be called a network device.

[0048] In Figure 2 and Figure 3 the communication systems of the shown architectures, multiple network devices can be included, and other numbers of terminal devices can be included within the coverage range of each network device. The embodiments of the present application do not limit this.

[0049] In the embodiments of the present application, Figures 1 to 3 the shown communication system may further include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF). The embodiments of the present application do not limit this.

[0050] It should be understood that in the embodiments of the present application, a device with communication functions in the network / system can be called a communication device.Figure 1 Taking the illustrated communication system 100 as an example, the communication devices may include a network device 110 and a terminal device 120 having communication functions. The network device 110 and the terminal device 120 may be the specific devices described above, which will not be elaborated here; the communication devices may also include other devices in the communication system 100, such as other network entities like a network controller and a mobility management entity, etc. The embodiments of the present application do not make limitations thereto.

[0051] For the sake of easy understanding, some related technical knowledge involved in the embodiments of the present application will be introduced first. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application. The embodiments of the present application include at least some of the following contents.

[0052] With the development of communication technologies, communication systems (e.g., 5G) will integrate the market potential of satellite and terrestrial network infrastructures. For example, the 5G standard makes NTN including the satellite segment become a part of the recognized 5G connection infrastructure of the 3rd generation partnership project (3GPP).

[0053] NTN refers to a network or network segment that uses radio frequency (RF) resources on a satellite or unmanned aerial system (UAS) platform. Taking satellites as an example, communication satellites are classified into low earth orbit (LEO) satellites, medium earth orbit (MEO) satellites, geostationary earth orbit (GEO) satellites, high elliptical orbit (HEO) satellites, etc. according to different orbital altitudes. Among them, LEO is an earth-centered orbit with a height of 2000 kilometers or less, or at least 11.25 cycles per day, and an eccentricity less than 0.25. Most artificial objects in outer space are located in LEO. LEO satellites orbit the earth at high speed (mobility) but in a predictable or determined orbit.

[0054] Satellites with different orbital altitudes have different orbital periods. Exemplarily, the typical height of LEO is 250 - 1500 kilometers, and the orbital period is 90 - 120 minutes. The typical height of MEO is 5000 - 25000 kilometers, and the orbital period is 3 - 15 hours. The height of GEO is about 35786 kilometers, and the orbital period is 24 hours.

[0055] As described above with satellites as an example Figure 2 andFigure 3 It can be seen that typical scenarios of a terminal device accessing an NTN system involve NTN transparent payloads or NTN regenerative payloads. Among them, Figure 2 the shown bent-pipe transponder architecture corresponds to NTN transparent payloads, Figure 3 and the shown regenerative transponder architecture corresponds to NTN regenerative payloads.

[0056] In an NTN system, a terminal device located on the ground communicates wirelessly through an aerial platform. Different from a terrestrial network (TN), the transmission delay in NTN is usually relatively large. Exemplarily, since satellites are usually located hundreds of kilometers above the Earth's surface, the propagation delay in NTN is much longer. Specifically, the propagation delay in NTN ranges from a few milliseconds to hundreds of milliseconds, depending on the altitude of the spaceborne or airborne platform and the type of payload in NTN.

[0057] Due to the large propagation delay, relevant problems may need to be solved when deploying technologies in a ground network in an NTN system. Exemplarily, in IoT NTN of release-17 (Rel-17) and Rel-18, the NB-IoT technology has been enhanced to support NTN.

[0058] With the development of IoT technology, in many IoT-like use cases other than NB-IoT, terminal devices with reduced capability (RedCap) can well provide services. That is to say, RedCap devices also need to be applied in an NTN system.

[0059] RedCap is a new type of terminal capability information introduced in Rel-17. Terminal devices related to RedCap can have reduced complexity and new power-saving functions, so they are more conducive to large-scale commercial popularization applications in 5G commercial networks. Taking NR as an example, RedCap can reduce the capabilities of devices by reducing the bandwidth, the number of transceiver antennas, reducing the rate, adjusting the modulation method, introducing a half-duplex mode, etc., so as to reduce the complexity of terminal devices, achieving a series of purposes such as reducing the terminal cost, power consumption, and extending the service life. Therefore, the requirements of RedCap are different from those of LTE for machines (LTE-M) and NB-IoT based on LTE.

[0060] As described above, RedCap supports the half-duplex (HD) operating mode. In the half-duplex frequency-division multiplexed (FDD) operating mode, a communication device can transmit and receive at different times and frequencies. Compared with full-duplex FDD (FD FDD), half-duplex FDD (HD FDD) can eliminate the need for a duplexer, thereby reducing complexity and cost. When RedCap adopts the HD FDD mode, it can save approximately 7% of the cost. Exemplarily, a half-duplex FDD device can relax the requirements for components within the radio frequency front end and use a lower-cost transmit-receive antenna switch and low-pass filter to replace the duplexer.

[0061] In addition, to enable the network to have flexible control and management rights over different types of terminal devices, relevant standards support the early identification and access control of RedCap terminal devices. Through this early identification and access control, the network can perform matching scheduling. For example, the network can adjust the access of terminal devices according to network resources and load conditions to avoid RedCap terminal devices over-occupying network resources and reducing the impact on the performance of traditional terminal devices.

[0062] However, the introduction of half-duplex FDD poses challenges to the scheduling of network devices. Taking the scheduling method in the NR system as an example, the network device has multiple scheduling methods for different signals, including semi-static scheduling, dynamic scheduling, etc.

[0063] Exemplarily, to adapt to the propagation delay in NTN, a scheduling time offset (K offset ) is introduced. K offset can be used to solve the timing relationship between the scheduling and transmission of various uplink communications to compensate for the propagation delay in NTN.

[0064] Taking the timing from the physical downlink control channel (PDCCH) to the physical uplink shared channel (PUSCH) as an example, the PDCCH can schedule the PUSCH communication of the terminal device by determining the K2 value. This timing can also be referred to as the "K2" timing. Among them, K2 can be the time offset between the transmission of the PDCCH communication and the reception of the PUSCH communication it schedules.

[0065] Exemplarily, the relative position between the PUSCH and its corresponding PDCCH can be indicated by the K2 field of the downlink control information (DCI). For example, K2 = 0 indicates that the PDCCH and the PUSCH are on the same time slot, K2 = 1 indicates that the PUSCH is on the time slot following the PDCCH, and K2 = 2 indicates that the PUSCH is on the 2 time slots following the PDCCH.

[0066] As an example, in the NTN system, K offset can be used to determine the timing from the PDCCH to the PUSCH in NTN. For example, K offset plus K2 can extend the offset between the PDCCH and the PUSCH to compensate for the propagation delay in NTN.

[0067] As an example, when the round trip delay (RTD) between the terminal device and the network device has a negative offset, the time for the terminal device to transmit the PUSCH can be determined jointly according to K offset , K2, and RTD.

[0068] For ease of understanding, the following combines Figure 4 to give a schematic illustration of the above two timing methods. Refer to Figure 4 , the base station in NTN can send the PDCCH to the terminal device in time slot n. For example, the base station can send it via a satellite.

[0069] As Figure 4 shown, the terminal device can receive the PDCCH sent by the base station in time slot n. In case 1, the terminal device can transmit the PUSCH at a position offset by K offset +K2 based on time slot n. In case 2, the RTD between the terminal device and the network device is a negative offset, and the terminal device can then transmit the PUSCH at the position of n+K offset +K2-RTD.

[0070] In Figure 4 the two timing methods shown, the terminal device may have the need to perform downlink (DL) reception and uplink (UL) transmission simultaneously. However, in the half-duplex FDD technology, the uplink and downlink need to be transmitted at different time points. Therefore, a situation where the uplink and downlink collide may occur.

[0071] Furthermore, in the NTN system, there is a large propagation delay between the uplink and downlink. Due to the particularity of the NTN system, the HDFDD technology may bring more complex conflict scenarios. The scenarios where conflicts may occur include but are not limited to the random access process and PUSCH transmission.

[0072] Exemplarily, the NTN system will also support the frequency range 2 (FR2) in the future. Similar to the random access in NR, each synchronization signal block (SSB) in a set of SSBs can be associated with a different downlink beam. It should be noted that the SSB in the embodiments of this application can also represent the synchronization signal / physical broadcast channel block (SS / PBCHblock).

[0073] During the random access process, the terminal device can select an appropriate downlink beam. Subsequently, the terminal device can transmit a physical random access channel (PRACH) signal on the corresponding random access channel occasion (RACHoccasion, RO) associated with the selected SSB to indicate its selection to the network device. Among them, the network device can pre-define the mapping between the SSB and the RO. Therefore, by detecting on which RO the terminal device performs the PRACH transmission, the network device can determine which downlink beam the terminal device has selected based on the mapping between the SSB and the RO.

[0074] However, in HD FDD transmission, the information between transmission and scheduling may be opaque. That is to say, the working mode of HD FDD may cause the uplink and downlink transmissions and scheduling to shield each other. Considering the communication delay in the NTN system again, the terminal device may have missed the corresponding RO after selecting the SSB. Therefore, the RO set by the network cannot be used like in the terrestrial network. It can be seen that even if the NTN network pre-schedules or sets the relationship between the SSB and the RO, conflicts may occur between multiple terminal devices supporting HD FDD, or with other terminal devices operating in the FD FDD mode.

[0075] Exemplarily, in an NTN system, there will be a large round trip time (RTT) for uplink and downlink transmissions. Generally, the network can evaluate the location and path loss of the terminal device and notify the terminal device of the adjustment amount of the timing advance (TA) through the media access control control element (MAC CE). However, in the HD FDD mode, uplink and downlink do not need to be synchronized as long as the uplink and downlink data are transmitted normally. In this scenario, the NTN network may not be able to know in time that the TA of the terminal device in the HD FDD mode has been adjusted, resulting in collisions between the transmissions of multiple downlink time slots and the uplink transmission. For example, during the initial access process of NTN, the UL time slot may conflict with multiple DL time slots.

[0076] As an example, the TA is usually small in TN, and the time slot index and symbol index of DL and UL can be aligned between the base station and the terminal device. Specifically, the terminal device can adjust the TA according to the indication of the base station, so the base station and the terminal device have a common understanding of the overlapping symbols of DL and UL and the non-overlapping symbols without enough gaps. It can be seen that in TN, the deterioration of system performance caused by conservative scheduling at the base station due to potential TA misalignment is acceptable. However, the terminal device of the NTN system compensates the TA by itself according to its own location and the ephemeris of the serving satellite. Therefore, there may be a significant misalignment between the base station and the terminal device when determining the overlapping or non-overlapping symbols of DL and UL without enough gaps. Although the terminal device can report the TA-related parameters and components to the base station, the misalignment between the base station and the terminal device is related to the reporting granularity of the MAC CE carrying the timing advance report. That is to say, infrequent reporting will cause this misalignment. For example, TS38.321 of 3GPP defines the reporting granularity as 1 millisecond. When the terminal device reports the TA based on a reporting granularity of 1 millisecond, the misalignment error between the last known TA at the base station and the actual TA used by the terminal device can reach 16 milliseconds.

[0077] Exemplarily, in NR NTN, a terminal device needs to receive a system information block (SIB) for communication. For example, the terminal device needs to read SIB19 from time to time to keep the ephemeris up to date. Specifically, the terminal device can determine when to read SIB19 based on the validity of the ephemeris and the time of the last acquisition of SIB19. Since SIB19 is broadcast periodically and there are many SIB19 transmissions within the validity period of the ephemeris, a full-duplex terminal device has a large number of opportunities to read SIB19. However, for a half-duplex terminal device, the potential conflict between UL transmission and SIB19 transmission may deprive the opportunity to read SIB19. Therefore, this conflict may lead to a loss of UL throughput of the terminal device and may degrade or exclude some UL services for the half-duplex terminal device. For example, if UL voice packets are transmitted in a way that repeats 16 times every 20 milliseconds, it is almost impossible to avoid the conflict between the PUSCH carrying voice and SIB19 transmission through base station scheduling, which may result in unacceptable voice quality and the loss of the opportunity to read SIB19.

[0078] In summary, when technologies that support half-duplex such as RedCap are applied in the NTN system, it is necessary to study the possibility of supporting half-duplex operation through NTN specification. Therefore, how to deploy half-duplex supported terminal devices in the NTN system and how to avoid conflicts that may occur in the half-duplex working mode are both technical problems that need to be solved urgently.

[0079] It should be noted that the problem of the conflict between the uplink and downlink transmissions in the NTN system caused by RedCap supporting the half-duplex mode mentioned above is only an example, and the embodiments of the present application can be applied to the communication scenarios of any type of terminal device that supports half-duplex communication in the NTN system.

[0080] In view of the above problems, the embodiments of the present application propose a method for wireless communication. Through this method, the first terminal device can determine the first resource related to half-duplex communication according to the first indication information. It can be seen that the first indication information can be used for the terminal device to determine the uplink transmission and / or downlink reception resources based on the half-duplex mode, so as to avoid the conflict between the uplink and downlink transmissions of the first terminal device.

[0081] For ease of understanding, the following combines Figure 5 to elaborate in detail on the method for wireless communication proposed in the embodiments of the present application. Figure 5 It is introduced from the perspective of the interaction between the first terminal device and the network device. Figure 5 The dotted part in

[0082] See Figure 5, at step S510, the first terminal device receives first indication information sent by the network device.

[0083] The first terminal device can be a communication device that performs uplink transmission to the network device, which is not limited herein.

[0084] In some embodiments, the first terminal device can be a terminal device in the NTN system or a terminal device acting as a relay, such as a UE. In some embodiments, the first terminal device can be a terminal device in the NB-IoT system. In some embodiments, the first terminal device can be a terminal device or a terminal device acting as a relay in a network with a long communication delay.

[0085] As an embodiment, the first terminal device is located within the coverage area of the satellite. For example, the first terminal device is an NTN Internet of Things terminal.

[0086] As an embodiment, the first terminal device is a communication device that performs uplink transmission to a network-side device in any communication system.

[0087] In some embodiments, the first terminal device is a terminal device that supports half-duplex communication or a terminal device acting as a relay. For example, the first terminal device is the RedCap device described above. Another example is that the first terminal device is a low-power device that supports half-duplex.

[0088] As an example, the first terminal device can support both the half-duplex mode and other modes. Other modes are, for example, the full-duplex mode.

[0089] The network device can be a network device or a network-side device in any communication system with a long RTD. A communication system with a long RTD is, for example, the NTN system. In some embodiments, the network device includes a satellite in the NTN system, and the first terminal device is a terminal device that communicates via the satellite. Exemplarily, when the base station is deployed on the satellite, the first terminal device communicates directly with the base station on the satellite. Exemplarily, when the satellite acts as a relay, the first terminal device communicates with the network device located on the ground via the satellite.

[0090] As an embodiment, when the network device includes a satellite, the first terminal device is located within the service area of the satellite at the current moment to receive the first information via the satellite.

[0091] In some embodiments, the first terminal device can be one of multiple terminal devices. Exemplarily, the first terminal device can be any one of the multiple terminal devices. The second terminal device other than the first terminal device among the multiple terminal devices can receive second indication information sent by the network device, or can also receive the first indication information jointly with the first terminal device, which is not limited herein.

[0092] In some embodiments, the above-mentioned multiple terminal devices may form a terminal device group or a set of terminal devices. Since the multiple terminal devices belong to a set of terminal devices, the network device may send indication information to the multiple terminal devices based on this set.

[0093] As an embodiment, when the network device includes a satellite, the multiple terminal devices in the terminal device group are all located within the service area of the satellite at the current moment, so as to receive the indication information corresponding to each terminal device through the satellite.

[0094] The first indication information is used to indicate resources related to half-duplex communication. The resources related to half-duplex communication may refer to dedicated resources for half-duplex communication, that is to say, the communication device may perform wireless communication in the half-duplex mode within these resources. In some embodiments, the wireless communication in the half-duplex mode may be an uplink transmission in the random access process, such as a PRACH transmission in the initial access process. In some embodiments, the wireless communication in the half-duplex mode may be an uplink channel transmission, such as a PUSCH transmission. In some embodiments, the wireless communication in the half-duplex mode may also be a reception of a downlink transmission, such as a terminal device reading a downlink channel or SIB sent by the network device.

[0095] The first indication information may be directly sent by the network device to the terminal device, or may be indicated through higher-layer signaling. In some embodiments, the first indication information may be carried in one or more of the following information: SIB, radio resource control (RRC), and PDCCH, so as to facilitate the network device to send it to the terminal device. The PDCCH may include DCI. In some embodiments, the first indication information may include being carried in the identifier of the resource, so as to indicate the resources related to half-duplex through higher-layer signaling or configuration information.

[0096] As an example, the first indication information may include a semi-static configuration performed by a higher layer for each channel. This configuration may include, but is not limited to, configured grant (CG)-PUSCH, downlink semi-persistent scheduling (SPS), and physical uplink control channel (PUCCH). For example, the first indication information may include SIB information or dedicated RRC signaling of the terminal device.

[0097] As an example, the first indication information may include an authorization message related to resource allocation, so as to determine the first resource.

[0098] In some embodiments, the first indication information may indicate the first resource dedicated to the first terminal device, or may indicate the resources for multiple terminal devices, which is not limited herein. The multiple terminal devices include the first terminal device, and the resources for the multiple terminal devices include the first resource.

[0099] The first indication information can be used by the first terminal device to determine the first resource related to half-duplex communication. That is to say, the first indication information can be used by the first terminal device to determine the resources for uplink and downlink transmissions when performing half-duplex communication.

[0100] In some embodiments, the first indication information may be determined according to the communication scenario of the first terminal device in the half-duplex mode. The communication scenarios of the first terminal device include but are not limited to the scenarios such as the random access process and PUSCH transmission described above.

[0101] In step S520, the first terminal device determines the first resource related to half-duplex communication according to the first indication information.

[0102] The first resource is used for the first terminal device to perform half-duplex communication in the network. That is to say, the first resource is a dedicated resource for the half-duplex mode to avoid conflicts with other modes. In some embodiments, the half-duplex communication includes uplink transmission and / or downlink reception based on the half-duplex mode. That is to say, the first resource can be an uplink transmission resource or a downlink transmission resource.

[0103] Exemplarily, the first resource can be a time-frequency resource of any size, which is not limited herein.

[0104] Exemplarily, the first resource can be used for the first terminal device to perform uplink transmission and / or downlink reception in NTN. That is to say, the first resource is a dedicated resource allocated by the network device for the first terminal device.

[0105] Exemplarily, the first resource is used for the first terminal device to perform one or more of the following wireless communications in NTN: random access in the half-duplex mode; sending an uplink channel in the half-duplex mode; and receiving the first SIB in the half-duplex mode.

[0106] For example, the first resource can be used for the first terminal device to perform uplink transmission in NTN in the half-duplex mode. That is to say, the first resource is a dedicated resource for the first terminal device to perform uplink transmission based on half-duplex, and can also be referred to as the first uplink resource or the half-duplex uplink dedicated resource. In this scenario, the first resource can avoid conflicts between the uplink transmission and the downlink transmission of the first terminal device.

[0107] For another example, the first resource can be used for the downlink reception of the first terminal device in the half-duplex mode of NTN. That is to say, the first resource is the dedicated resource for the first terminal device to perform downlink reception based on half-duplex, and can also be called the first downlink resource or the half-duplex downlink dedicated resource. In this scenario, the first resource can ensure the downlink reception of the first terminal device to avoid missing necessary downlink data reading.

[0108] For another example, the first resource can be used for the uplink transmission and downlink reception of the first terminal device in the half-duplex mode of NTN. That is to say, the first resource can be used for the first terminal device to respectively determine the dedicated transmission resources for half-duplex to avoid conflicts with other terminal devices.

[0109] In some embodiments, the first resource can be related to the communication scenario of the first terminal device. The communication scenario has been described above and will not be elaborated here.

[0110] In some embodiments, in the scenario of random access, the first resource can include one or more ROs for the first terminal device to perform random access in the half-duplex mode. In this scenario, the first indication information can be used to indicate the one or more ROs.

[0111] Exemplarily, the first indication information can include a first identifier dedicated to half-duplex communication. One or more ROs for the first terminal device can carry the first identifier. Therefore, the first terminal device can determine one or more ROs for random access according to the first identifier to avoid conflicts with RO resources of other terminal devices or other modes (for example, full-duplex FDD mode).

[0112] As an example, the first identifier can be the RO_HD identifier. That is to say, the ROs for the half-duplex mode will be marked with RO_HD. Optionally, for the terminal devices accessing based on the HD FDD method, only the ROs with the RO_HD identifier are valid. For example, when the HD FDD mode and the FD FDD mode correspond to the same SSB, multiple ROs mapped by the SSB can be marked to indicate which ROs belong to HD FDD (marked with RO_HD) and which ROs belong to FD FDD to avoid conflicts with other terminal devices.

[0113] Exemplarily, multiple ROs for random access can be grouped to determine one or more ROs for the half-duplex mode. In this scenario, the first indication information can indicate the first RO group for half-duplex communication. That is to say, the first RO group among the multiple RO groups obtained after grouping can be used for half-duplex communication.

[0114] As an example, multiple ROs for grouping may correspond to the same SSB or multiple SSBs, which is not limited herein. For example, multiple RO groups may correspond to the first SSB, that is, multiple RO groups correspond to the same SSB.

[0115] As an example, the first RO group may include one or more ROs. The first terminal device may select an RO for random access from the one or more ROs.

[0116] As an example, when grouping, the number of ROs included in each group can be set through SIB information or RRC information.

[0117] For example, when there are 2 ROs in the frequency domain and 3 ROs in the time domain, a total of 6 ROs can be available for one SSB. The 6 ROs can be divided into 2 groups: {RO_FD, RO_HD}. The ROs in the two groups respectively correspond to the FD FDD mode and the HD-FDD mode.

[0118] Exemplarily, when the first resource includes multiple ROs among one or more ROs, at least two ROs among the multiple ROs respectively correspond to different SSBs. Respective correspondence to different SSBs may mean that multiple ROs for random access by the first terminal device are scheduled across SSBs. When multiple ROs are scheduled based on cross-SSB, it can meet the situation where the NTN network latency is relatively large.

[0119] As an example, since SSBs usually appear periodically, multiple ROs in the first resource can be scheduled among multiple SSBs.

[0120] As an example, when the HD FDD mode and the FD FDD mode correspond to the same SSB, a half-duplex mode terminal device can determine one or more ROs in the first resource based on cross-SSB scheduling.

[0121] As an example, when scheduling ROs across SSBs, the RO with a later time domain position can be determined based on the RO with an earlier time domain position. For example, at least two ROs may include a first RO with an earlier time domain position and a second RO with a later time domain position. In the scenario of cross-SSB scheduling, the time domain position RO’ of the second RO can be:

[0122] RO′ = RO + 2 μ ×K cell，offset ;

[0123] where RO represents the time domain position of the first RO, μ is related to the subcarrier spacing, and K cell，offset represents the first offset value.

[0124] Optionally, K cell，offsetThe value can be provided by the parameter CellSpecific_Koffset in the RRC layer.

[0125] It should be noted that the manner of cross-SSB scheduling of RO is not limited to the half-duplex mode. Exemplarily, in the NTN system, when the terminal device performs random access or other communications based on the full-duplex mode, this manner of cross-SSB scheduling of RO is also applicable.

[0126] Exemplarily, considering the mapping relationship between SSB and RO, the SSB can also be configured to avoid different SSBs of the HD FDD terminal device and the FD FDD terminal device in the same serving cell being mapped to the same RO.

[0127] As an example, the SSB for HD FDD is configured to a different time slot or symbol from that of FD FDD.

[0128] As an example, multiple SSBs can be grouped to facilitate the first terminal device to determine the first resource. Optionally, a part of the multiple SSBs is for the terminal devices executing the HD FDD mode in the cell, and the other part is for the terminal devices executing the FDFDD mode.

[0129] As an example, one or more ROs for the first terminal device to perform random access can correspond to any SSB in the first SSB group supporting half-duplex communication. That is to say, after the SSBs are grouped, it can include a first SSB group supporting half-duplex. The first indication information can be used to indicate the first SSB group.

[0130] As an example, the terminal device supporting half-duplex can report the capability indication to the network device. When the network device receives the capability information that a certain terminal device supports half-duplex, the network device can group the SSBs and indicate the first SSB group. It should be understood that the capability information of the terminal device supporting half-duplex can be supporting both half-duplex and full-duplex, or only supporting half-duplex, which is not limited here.

[0131] For example, the first terminal device can send the capability information supporting half-duplex communication to the network device. This capability information can trigger the network device to group multiple SSBs and determine the first indication information. The first terminal device can select the SSB corresponding to one or more ROs for random access in the first SSB group according to the first indication information.

[0132] For example, below 6 GHz, there are 4 - 8 SSBs in a synchronization signal (SS) burst set, that is, it can scan up to 8 beams at most. If the terminal device reports its capability indication to the network side, indicating that it supports both HDFDD and FD FDD or supports HD FDD, the network can group the SSBs in the SS burst set to correspond to different FDD modes respectively. For the terminal device, if it selects the HD FDD operating mode, it selects the corresponding SSB from the pre - defined SSB group that supports HD FDD.

[0133] In some embodiments, in the communication scenario after the RRC connection is established, the network device can reserve resources for multiple terminal devices that support the half - duplex mode. These reserved resources can form a first resource pool. The first resource pool can also be referred to as the HD FDD CG resource pool. Exemplarily, the NTN network device can reserve resources for the terminal device operating in the HD FDD mode through the first resource pool.

[0134] As an example, the first resource pool can include multiple consecutive time - frequency resources or multiple non - consecutive time - frequency resources.

[0135] As an example, the first resource pool is used to support the uplink transmission of multiple terminal devices in the half - duplex mode. The multiple terminal devices include a first terminal device. Therefore, the first resource is the time - frequency resource in the first resource pool.

[0136] Optionally, the network device can send the information of the first resource pool to the first terminal device after receiving the first request from the first terminal device. The first request is for the first terminal device to request the network device to allocate resources for uplink communication in a future time slot.

[0137] As an example, the first request can include the resource information required by the first terminal device or various information such as the service type of the first terminal device, which is convenient for the network device to allocate the first resource for the first terminal device.

[0138] As an example, the first request is, for example, a scheduling request (SR). In the half - duplex mode, the terminal device can send an SR to request uplink resources. The network device can allocate appropriate resources for the terminal device in advance to avoid uplink - downlink conflicts.

[0139] As an example, if the NTN network receives SRs from different terminal devices within a certain time T, where T is a rational number, the base station can uniformly allocate uplink transmission resources for these terminal devices. For example, the first terminal device sends a first request within the first time period. The first request is used for the first terminal device to request information about the first resource pool and allocation information of the first resource from the network device.

[0140] Optionally, the length T of the first time period can be related to the relative positions of the network device and the terminal device. The position of the terminal device can be determined according to the global navigation satellite system (GNSS) information or the positioning information sent by the network device. The position of the network device can be determined according to the parameters of the satellite ephemeris.

[0141] As an example, when the first terminal device starts the HD FDD operating mode, the base station sends a grant message to the first terminal device. The grant message may include first indication information. Optionally, the grant message may carry information about the HDFDD CG resource pool and the resource allocation information of the first terminal device. Optionally, after the RRC connection is established, the first terminal device can send SR information to the NTN network. The NTN network can allocate some or all of the resources required for the service to the first terminal device according to the first resource pool and send the specific resource information to the first terminal device through PDCCH DCI.

[0142] Optionally, the first terminal device can determine the first resource according to the first indication information. For example, the first indication information can be used for the first terminal device to determine the position of the first resource in the first resource pool.

[0143] Optionally, the network device can allocate the first resource for the first terminal device according to one or more types of information to reduce the collision of HD FDD resources. Exemplarily, the position of the first resource in the first resource pool can be determined according to one or more of the following types of information: the service levels of multiple terminal devices; the resources required by the first terminal device; the signal strength and / or reference path loss corresponding to the first terminal device; and the number of negative acknowledges (NACKs) received by the first terminal device.

[0144] As an example, the service levels of multiple terminal devices can be determined according to the service levels of the services of the terminal devices. Optionally, the service level of the first terminal device can be determined according to the services of multiple terminal devices including the first terminal device. For example, the higher the service level of the service of the first terminal device, the smaller the index in the first resource pool corresponding to the allocated first resource. That is to say, the higher the level of the first terminal device, the closer the first resource is to the starting point position of the first resource pool. When multiple terminal devices correspond to different services, the allocated resource indexes are different. Therefore, when multiple terminal devices perform uplink transmission based on the allocated resources, the collision of HD FDD resources can be reduced.

[0145] As an example, the service levels of multiple terminal devices can include service priorities. The priorities of different services can be set based on different levels of quality of service (QoS).

[0146] As an example, the first resource can be determined according to the resources required by the first terminal device. Optionally, the size of the first resource is greater than or equal to the size of the resources required by the first terminal device.

[0147] As an example, the first resource can be determined according to the signal strength and / or reference path loss corresponding to the first terminal device. The signal strength can be determined by various parameters such as reference signal received power (RSRP). The reference path loss can be an estimated value of the path loss at the location of the first terminal device. That is to say, the reference path loss can be determined according to the location of the terminal device.

[0148] As an example, the first resource can be determined according to the situation of the feedback information received by the first terminal device. Optionally, when the first terminal device performs transmission based on hybrid automatic repeat reQuest (HARQ), the number of NACKs received by the first terminal device can be used to determine the first resource.

[0149] For example, the feedback information of the uplink transmission received by the first terminal device can include NACK. When the number of NACKs received by the first terminal device reaches the first threshold, the first terminal device sends a first request. The first threshold is, for example, 3 times or 5 times, etc.

[0150] For example, when the number of NACKs in the HARQ feedback received by the first terminal device from the base station reaches the first threshold, the first terminal device may determine that the PUSCH transmission may collide with the downlink reception or the uplink of other terminal devices. In this scenario, the first terminal device sends an SR to the NTN. Further, the SR may include information such as the number of received NACKs, the service level, the required resources, etc.

[0151] For ease of understanding, the following describes, by way of example, the method by which a network device sends first indication information based on a first request in conjunction with Figure 6 the possible implementation shown. For the sake of brevity, Figure 5 terms that have already been explained will not be elaborated on again.

[0152] Refer to Figure 6 , in step S610, the first terminal device sends the capability information supporting half-duplex to the network device.

[0153] In step S620, the network device configures a dedicated first resource pool for half-duplex according to the capability information of one or more terminal devices.

[0154] In step S630, the first terminal device sends a first request to the network device within the first time period.

[0155] In step S640, the network device determines a first resource according to the first request and the first resource pool, and sends first indication information.

[0156] In step S650, the first terminal device determines the first resource according to the first indication information, and performs uplink transmission on the first resource.

[0157] Optionally, the first resource may also be determined according to the resources required by the first terminal device and the remaining resources in the first resource pool. When the remaining resources in the first resource pool cannot meet the resources required by the first terminal device, the network device needs to allocate other resources for the first terminal device. As an example, after receiving the SR sent by the first terminal device, the NTN network may determine whether there are appropriate resources according to the resource allocation situation in the first resource pool. If there are appropriate resources in the first resource pool, the network device may allocate or re-allocate the required resource size for the first terminal device; if not, the network device needs to perform dynamic resource allocation for the first terminal device through PDCCH DCI.

[0158] As an example, when the size of the remaining resources in the first resource pool is smaller than the size of the resources required by the first terminal device, the first indication information may include indication information for dynamic resource allocation. That is, when the remaining resources in the first resource pool do not meet the requirements of the first terminal device, the network device may send the dynamically allocated resource information through the first indication information.

[0159] Optionally, the time domain position of the first resource can also be determined according to the time domain position related to the first indication information. An exemplary illustration will be given later in combination with the calculation formula of the first resource.

[0160] In some embodiments, in the scenario of downlink reception, the first resource may further include a transmission window for various information sent by the network device, so as to facilitate the first terminal device to timely read various information sent by the network device.

[0161] As an example, the various information sent by the network device includes various SIBs. The first SIB can be any one or more of the various SIBs. For example, the first SIB is the SIB19 described above.

[0162] Optionally, the first resource may include one or more transmission windows of the first SIB within the second time period to ensure that the first terminal device timely receives the first SIB. Exemplarily, the network device may send the first SIB respectively within the one or more transmission windows, and the first terminal device may preferentially receive the first SIB within any one of the one or more transmission windows.

[0163] As an example, when the first terminal device also needs to perform uplink transmission or receive downlink channels (PDCCH and / or PDSCH) within any one of the transmission windows, the first terminal device may preferentially receive or read the first SIB.

[0164] As an example, when there are multiple transmission windows within the second time period, the multiple transmission windows may have a certain interval.

[0165] As an example, the second time period may be the window period of system information (SI). The system periodically sends SIB19 within the associated SI window period. The duration and start time of the SI window period are known to the first terminal device. Therefore, the network device can reconfigure the SI window for reading SIB19 to facilitate the first terminal device to timely update the ephemeris information.

[0166] As an example, the second time period may be a periodically configured time period. For example, the second time period is 1024 subframes.

[0167] As an example, the first indication information may indicate the configuration information of the above one or more transmission windows. Exemplarily, in order to ensure the time for the first terminal device to read SIB19, a window subset dedicated to the half-duplex device is configured within the second time period, that is, the SIB19 SI window subset. For example, the network device can configure a dedicated SI window for all terminal devices supporting HD FDD.

[0168] As an example, during these subsets of the SI window, the first terminal device may preferentially read SIB19.

[0169] As an example, the configuration information of the window subset supporting HD FDD may be indicated by SIB information or high-layer signaling.

[0170] For example, 2 SI windows are configured for every 1024 subframes. In response, the terminal device supporting HD-FDD may attempt to read SIB19 during any one of these two SI windows. For ease of understanding, the following is an exemplary description in combination with Figure 7 the implementation method.

[0171] See Figure 7 , there are 7 transmission windows of SIB19 in the second time period, namely window 701 to window 707. Among them, window 702 and window 706 are reserved SIB19 transmission windows supporting half-duplex, and the other windows are regular SIB19 transmission windows. That is, window 702 and window 706 represent the 2 SI windows configured for the HD FDD terminal device, and the other windows represent the SI windows configured for the FD FDD terminal device. After the first terminal device enables the half-duplex mode, it preferentially receives SIB19 in window 702 and window 706.

[0172] As described above in combination with Figures 5 to 7 , the method for the first terminal device to determine the first resource according to the first indication information is introduced in detail. Through this method, multiple terminal devices can perform uplink transmission or read SIB19 on the resources dedicated to half-duplex, thereby avoiding conflicts in uplink and downlink transmissions and also avoiding the problem that the ephemeris information cannot be updated in time due to periodic uplink transmissions. Further, in the first resource pool, the network device can allocate resources for multiple terminal devices according to various information such as service levels, avoiding transmission conflicts among multiple terminal devices.

[0173] As can be seen from the foregoing, the time-domain position of the first resource may also be determined according to the time-domain position related to the first indication information. The time-domain position related to the first indication information may include the time-domain positions of various information carrying the first indication information.

[0174] In some embodiments, the first resource may be determined according to the time-domain position related to the first indication information and a second offset value. The second offset value may be determined according to the time length for offset and the time length required for the first terminal device to perform transmission. The time length for offset is, for example, the time length of the resources for half-duplex communication. The time length required for the first terminal device to perform transmission includes the time length of the resources required for the service of the first terminal device.

[0175] Optionally, the second offset value is determined based on the identity (ID) of the first terminal device and / or the ID of the terminal device group to which the first terminal device belongs. For example, the first resource can be associated with the ID related to the first terminal device to avoid conflicts between different terminal devices.

[0176] Exemplarily, when the network device performs dynamic resource allocation through PDCCH, the time domain position related to the first indication information can be the time domain position of the PDCCH carrying the first indication information.

[0177] Exemplarily, the ID of the first terminal device can be the International Mobile Station Equipment Identity (IMEI) or the Temporary IMEI (T-IMEI), which is not limited herein.

[0178] As an example, when the second offset value is related to the ID of the first terminal device, the time domain position of the first resource can be:

[0179]

[0180] where slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset for compensating the NTN transmission delay, UE ID represents the ID of the first terminal device, N represents the time length of the resources for half-duplex communication, and L represents the time length of the resources required for the service of the first terminal device.

[0181] Exemplarily, N and L can be determined by the number of time slots or other time units. For example, N can represent the length of N time slots.

[0182] Exemplarily, K offset is the scheduling time offset mentioned above and can be set by the network device. In some examples, K offset can be cell-specific, first-terminal-device-specific, or beam-specific. For example, the network device can configure the corresponding K offset value for each beam from the same satellite and / or the same non-terrestrial cell. The value of K offset can be set as a beam-level or cell-level parameter.

[0183] Exemplarily, the network device or the first terminal device may calculate the cell-specific K of the non-terrestrial cell at least partially based on the distance between the base station or gateway and the satellite in the feeder link and the maximum possible distance to the terminal device offset value.

[0184] Exemplarily, the value of K offset needs to be determined according to the actual scenario. For example, for different NTN systems, the value of K offset may be different.

[0185] Exemplarily, the length of L may be determined according to the size of the first resource pool or other available resources reserved.

[0186] As can be seen from the above formula, the second offset value is For each UE ID , the relative position offset of the dedicated resources corresponding to this ID for the terminal device is different from that of the terminal devices corresponding to other IDs. If all N time slots relative to the PDCCH time domain position in the uplink resource are available for selection by the PUSCH, for different UEs ID the offset positions are all different.

[0187] Optionally, when multiple terminal devices within a terminal device group can reuse the same resource block (RB), the second offset value can also be determined according to the ID of the terminal device group where the first terminal device is located.

[0188] As an example, if the system supports orthogonal cover code (OCC), the transmission data of multiple users can be multiplexed onto one RB and distinguished by the OCC orthogonal code. In this scenario, multiple users can determine the ID (Group ID ) of a terminal device group that reuses the same RB in a grouped manner. If all N time slots relative to the PDCCH time domain position in the uplink resource are available for selection by the PUSCH, for different Groups ID the offset positions are different.

[0189] As an example, when the second offset value is related to the ID of the terminal device group where the first terminal device is located, the time domain position of the first resource is:

[0190]

[0191] where Group ID represents the ID of the terminal device group where the first terminal device is located, and the second offset value is

[0192] Optionally, the second offset value can also be determined according to the priority of the first terminal device or the priority of the terminal device group to which the first terminal device belongs. For each terminal device or terminal device group, a priority level needs to be set. The higher the priority of the first terminal device or the terminal device group it belongs to, the closer the first resource can be to the starting point of the available resources, that is, the smaller the index.

[0193] As an example, when the second offset value is also related to the priority, the time domain position of the first resource can be:

[0194]

[0195] where γ i represents the priority of the terminal device set to which the first terminal device belongs, and the second offset value is

[0196] Optionally, the smaller γ i is, the higher the priority of the terminal device group to which the first terminal device belongs.

[0197] As can be seen from the foregoing, in the NTN system, the misalignment between the base station and the terminal device is related to the reporting granularity of the MAC CE carrying the TA report. That is to say, the granularity of the TA report cannot meet the large transmission delay in the NTN system. To make the TA of the HD FDD terminal device more accurate, the TA setting in the NTN can be enhanced. The HD FDD terminal device can be the first terminal device.

[0198] In some embodiments, the network can set the reporting granularity of the TA to support the symbol duration, that is, the microsecond (μs) level. By adjusting the time granularity of the TA report, the network device can timely learn the TA adjustment amount of the terminal device to reduce the TA misalignment.

[0199] In some embodiments, the network can set the TA within the range of [TA min , TA max , where TA min and TA max are the minimum and maximum TAs of the cell, respectively. Since the TA is within the range [TA min , TA max , the network device can know the minimum and maximum TAs of the cell, and the potential TA misalignment can be solved by the scheduling of the network device. The network device can use this TA to determine the reserved duration of the SSB, as shown in Figure 8 shown. The following will give an exemplary description of this method in combination with Figure 8

[0200] See Figure 8 ​For a terminal device with a given TA, multiple time units 810 in the downlink can be determined based on the TA parameter, such as 4 DL symbols. Figure 8 The N in TX-RX is the SSB duration corresponding to when the terminal device performs the handover from transmission to reception, and the N in RX-TX is the SSB duration corresponding to when the terminal device performs the handover from reception to transmission. It should be understood that the SSB within the handover time of transmission-reception or reception-transmission can be considered as an invalid resource for PUSCH transmission. Figure 8 The T in C represents the minimum sampling time period in the system.

[0201] As Figure 8 shown, for all terminal devices with TA within the TA range ([TA min , TA max ), the duration from SSB start -N TX-RX T C +TA min to SSB end +N RX-TX T C +TA max is the reserved duration of the SSB. All UL symbols outside this reserved duration will not conflict with the reception of the SSB. The 6 UL symbols that overlap with this reserved duration are invalid resources. Among them, SSB start and SSB end are the start and end times of the UL symbols with the same SSB start and end symbol indices respectively.

[0202] Exemplarily, when performing PUSCH repetition and resource allocation for HD FDD terminal devices in NR NTN, the duration from SSB start -N TX-RX T C +TA min to SSB end +N RX-TX T C +TA max can be determined based on this TA range, so as to determine that the UL symbols overlapping with this duration are invalid resources, in order to avoid the conflict between the uplink transmission and the downlink transmission of the terminal device.

[0203] The method embodiments of the present application have been described in detail above in conjunction with Figures 1 to 8 . The device embodiments of the present application will be described in detail below in conjunction with Figures 9 to 11 . It should be understood that the description of the device embodiments corresponds to the description of the method embodiments. Therefore, the parts not described in detail can refer to the previous method embodiments.

[0204] Figure 9 It is a schematic block diagram of a terminal device according to an embodiment of the present application. The terminal device 900 may be any one of the first terminal devices described above. Figure 9 The illustrated terminal device 900 includes a determination unit 910.

[0205] The determination unit 910 is configured to determine a first resource related to half-duplex communication according to first indication information; wherein, the first resource is used for the first terminal device to perform uplink transmission and / or downlink reception in NTN.

[0206] Optionally, the first resource includes one or more ROs, and one or more ROs are used for the first terminal device to perform random access in the half-duplex mode, and the first indication information is used for the first terminal device to determine one or more ROs.

[0207] Optionally, the first indication information includes a first identifier, and one or more ROs carry the first identifier, and the first identifier is used to indicate that one or more ROs are used for half-duplex communication.

[0208] Optionally, the first indication information is used to indicate a first RO group, the first RO group includes one or more ROs, the first RO group is an RO group used for half-duplex communication among multiple RO groups, and the multiple RO groups correspond to a first SSB.

[0209] Optionally, the first resource includes multiple ROs among one or more ROs, and at least two ROs among the multiple ROs respectively correspond to different SSBs.

[0210] Optionally, at least two ROs include a first RO with a relatively forward time domain position and a second RO with a relatively backward time domain position, and the time domain position RO′ of the second RO is:

[0211] RO′ = RO + 2 μ ×K cell，offset ;

[0212] wherein, RO represents the time domain position of the first RO, μ is related to the subcarrier spacing, and K cell，offset represents a first offset value.

[0213] Optionally, one or more ROs correspond to any SSB in a first SSB group that supports half-duplex communication, the first indication information is used to indicate the first SSB group, the terminal device 900 further includes a first transmission unit, which is configured to send capability information indicating support for half-duplex communication to a network device, and the capability information is used to trigger the network device to group multiple SSBs to determine the first indication information; the determination unit 910 is further configured to select the SSB corresponding to one or more ROs in the first SSB group according to the first indication information.

[0214] Optionally, the first resource is time-frequency resources in a first resource pool, and the first resource pool is used to support multiple terminal devices for uplink transmission in a half-duplex mode. The multiple terminal devices include a first terminal device.

[0215] Optionally, the position of the first resource in the first resource pool is determined according to one or more of the following information: the service levels of multiple terminal devices; the resources required by the first terminal device; the signal strength and / or reference path loss corresponding to the first terminal device; and the number of NACKs received by the first terminal device.

[0216] Optionally, the terminal device 900 further includes a second sending unit, which can be used to send a first request during a first time period. The first request is used to request information about the first resource pool and allocation information of the first resource from the network device.

[0217] Optionally, the terminal device 900 further includes a first receiving unit, which can be used to receive feedback information for uplink transmission. The feedback information includes NACK. The second sending unit is further used to send the first request when the number of NACKs received by the first terminal device reaches a first threshold.

[0218] Optionally, when the size of the remaining resources in the first resource pool is smaller than the size of the resources required by the first terminal device, the first indication information includes indication information for dynamically allocating resources.

[0219] Optionally, the first resource includes one or more transmission windows of a first SIB during a second time period. The terminal device 900 further includes a second receiving unit, which can be used to preferentially receive the first SIB within any one of the one or more transmission windows.

[0220] Optionally, the first indication information is used to indicate configuration information of one or more transmission windows, and the first SIB is SIB19.

[0221] Optionally, the first indication information is carried in one or more of the following information: SIB, RRC, and PDCCH.

[0222] Optionally, the first resource is determined according to the time-domain position related to the first indication information and a second offset value. The second offset value is determined according to the ID of the first terminal device and / or the ID of the set of terminal devices where the first terminal device is located.

[0223] Optionally, the time-domain position of the first resource is:

[0224]

[0225] where slot n represents the time-domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, and K offsetIndicates the time offset for compensating the NTN transmission delay, UE ID Indicates the ID of the first terminal device, N indicates the time length of the resources for half-duplex communication, and L indicates the time length of the resources required for the service of the first terminal device.

[0226] Optionally, the first terminal device is any terminal device in a group of terminal devices multiplexing the same resource block, and the second offset value is determined according to the ID of the group of terminal devices.

[0227] Optionally, the second offset value is further determined according to the priority of the first terminal device or the group of terminal devices where the first terminal device is located.

[0228] Optionally, the time domain position of the first resource is:

[0229]

[0230] where slot n Indicates the time domain position of the PDCCH carrying the first indication information, K2 indicates the time offset between the PDCCH and the corresponding uplink channel, K offset Indicates the time offset for compensating the NTN transmission delay, γ i Indicates the priority of the group of terminal devices where the first terminal device is located, Group ID Indicates the ID of the group of terminal devices where the first terminal device is located, N indicates the time length of the resources for half-duplex communication, and L indicates the time length of the resources required for the service of the first terminal device.

[0231] Figure 10 Is a schematic block diagram of a network device according to an embodiment of the present application. The network device 1000 may be any of the network devices described above. Figure 10 The network device 1000 shown includes a sending unit 1010.

[0232] The sending unit 1010 can send first indication information to the first terminal device; wherein, the first indication information is used for the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used for the first terminal device to perform uplink transmission and / or downlink reception in NTN.

[0233] Optionally, the first resource includes one or more ROs, and one or more ROs are used for the first terminal device to perform random access in the half-duplex mode, and the first indication information is used for the first terminal device to determine one or more ROs.

[0234] Optionally, the first indication information includes a first identifier, and one or more ROs carry the first identifier, and the first identifier is used to indicate that one or more ROs are used for half-duplex communication.

[0235] Optionally, the first indication information is used to indicate a first RO group, the first RO group includes one or more ROs, the first RO group is an RO group for half-duplex communication among a plurality of RO groups, and the plurality of RO groups correspond to a first SSB.

[0236] Optionally, the first resource includes a plurality of ROs among one or more ROs, and at least two ROs among the plurality of ROs respectively correspond to different SSBs.

[0237] Optionally, the at least two ROs include a first RO with a relatively early time domain position and a second RO with a relatively late time domain position, and the time domain position RO′ of the second RO is:

[0238] RO ′ = RO + 2 μ ×K cell，offset ;

[0239] wherein, RO represents the time domain position of the first RO, μ is related to the subcarrier spacing, and K cell，offset represents a first offset value.

[0240] Optionally, one or more ROs correspond to any SSB in a first SSB group that supports half-duplex communication, the first indication information is used to indicate the first SSB group, the network device 1000 further includes a first receiving unit, which can be used to receive the capability information indicating support for half-duplex communication sent by the first terminal device, and the capability information is used to trigger the network device to group a plurality of SSBs to determine the first indication information, and the first indication information is used for the first terminal device to select the SSB corresponding to one or more ROs in the first SSB group.

[0241] Optionally, the first resource is the time-frequency resource in a first resource pool, and the first resource pool is used to support the uplink transmission of a plurality of terminal devices in the half-duplex mode, and the plurality of terminal devices include the first terminal device.

[0242] Optionally, the position of the first resource in the first resource pool is determined according to one or more of the following information: the service levels of a plurality of terminal devices; the resources required by the first terminal device; the signal strength and / or reference path loss corresponding to the first terminal device; and the number of NACKs received by the first terminal device.

[0243] Optionally, the network device 1000 further includes a second receiving unit, which can be used to receive a first request sent by the first terminal device within a first time period, and the first request is used to request the network device for the information of the first resource pool and the allocation information of the first resource.

[0244] Optionally, the sending unit 1010 is further used to send feedback information of the uplink transmission to the first terminal device, and the feedback information includes NACK; the second receiving unit is further used to receive the first request when the number of NACKs received by the first terminal device reaches a first threshold.

[0245] Optionally, when the size of the remaining resources in the first resource pool is smaller than the size of the resources required by the first terminal device, the first indication information includes indication information for dynamically allocating resources.

[0246] Optionally, the first resource includes one or more transmission windows of the first SIB within a second time period, and the sending unit 1010 is further configured to send the first SIB within one or more transmission windows respectively.

[0247] Optionally, the first indication information is used to indicate configuration information of one or more transmission windows, and the first SIB is SIB19.

[0248] Optionally, the first indication information is carried in one or more of the following information: SIB, RRC, and PDCCH.

[0249] Optionally, the first resource is determined according to the time domain position related to the first indication information and a second offset value, and the second offset value is determined according to the ID of the first terminal device and / or the ID of the set of terminal devices where the first terminal device is located.

[0250] Optionally, the time domain position of the first resource is:

[0251]

[0252] where slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, and K offset represents the time offset for compensating the NTN transmission delay, UE ID represents the ID of the first terminal device, N represents the time length of the resources for half-duplex communication, and L represents the time length of the resources required for the service of the first terminal device.

[0253] Optionally, the first terminal device is any terminal device in a group of terminal devices multiplexing the same resource block, and the second offset value is determined according to the ID of the group of terminal devices.

[0254] Optionally, the second offset value is further determined according to the priority of the first terminal device or the group of terminal devices where the first terminal device is located.

[0255] Optionally, the time domain position of the first resource is:

[0256]

[0257] where slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, and K offsetIndicates the time offset for compensating the NTN transmission delay, γ i Indicates the priority of the terminal device group where the first terminal device is located, Group ID Indicates the ID of the terminal device group where the first terminal device is located. N represents the time length of the resources for half-duplex communication, and L represents the time length of the resources required for the service of the first terminal device.

[0258] Figure 11 The following is a schematic structural diagram of the communication device according to an embodiment of the present application. Figure 11 The dotted line in [ ] indicates that the unit or module is optional. The device 1100 can be used to implement the method described in the above method embodiment. The device 1100 can be a chip, a terminal device, or a network device.

[0259] The device 1100 may include one or more processors 1110. The processor 1110 can support the device 1100 to implement the method described in the foregoing method embodiment. The processor 1110 can be a general-purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0260] The device 1100 may further include one or more memories 1120. A program is stored on the memory 1120, and the program can be executed by the processor 1110, so that the processor 1110 executes the method described in the foregoing method embodiment. The memory 1120 can be independent of the processor 1110 or integrated in the processor 1110.

[0261] The device 1100 may further include a transceiver 1130. The processor 1110 can communicate with other devices or chips through the transceiver 1130. For example, the processor 1110 can perform data transmission and reception with other devices or chips through the transceiver 1130.

[0262] An embodiment of the present application further provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the terminal device or network device provided in the embodiment of the present application, and the program causes the computer to execute the methods executed by the terminal device or network device in various embodiments of the present application.

[0263] The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or a data center that integrates one or more available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0264] An embodiment of the present application further provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device or network device provided in the embodiment of the present application, and the program causes the computer to execute the methods executed by the terminal device or network device in various embodiments of the present application.

[0265] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer 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 computer-readable storage medium. For example, the computer instructions can be transmitted from a website, a computer, a server, or a data center to another website, a computer, a server, or a data center in a wired manner (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (for example, infrared, wireless, microwave, etc.).

[0266] An embodiment of the present application further provides a computer program. The computer program can be applied to the terminal device or network device provided in the embodiment of the present application, and the computer program causes the computer to execute the methods executed by the terminal or network device in various embodiments of the present application.

[0267] In this application, the terms "system" and "network" can be used interchangeably. Additionally, the terms used in this application are only for explaining specific embodiments of this application and are not intended to limit this application. In the specification and claims of this application and the terms "first", "second", "third", "fourth", etc. in the accompanying drawings are used to distinguish different objects and not to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0268] In the embodiments of this application, the "indication" mentioned can be a direct indication, an indirect indication, or can also mean having an associated relationship. For example, A indicates B, which can mean that A directly indicates B. For example, B can be obtained through A; it can also mean that A indirectly indicates B. For example, A indicates C and B can be obtained through C; it can also mean that there is an associated relationship between A and B.

[0269] In the embodiments of this application, the term "corresponding" can mean that there is a direct or indirect corresponding relationship between the two, or can also mean that there is an associated relationship between the two, or can also be relationships such as indication and being indicated, configuration and being configured, etc.

[0270] In the embodiments of this application, "predefined" or "preconfigured" can be achieved by pre-saving corresponding codes, tables, or other means that can be used to indicate relevant information in a device (for example, including terminal devices and network devices). This application does not limit its specific implementation method. For example, predefined can refer to being defined in a protocol.

[0271] In the embodiments of this application, the "protocol" can refer to standard protocols in the field of communication. For example, it can include LTE protocols, NR protocols, and related protocols applied to future communication systems. This application does not limit this.

[0272] In the embodiments of this application, determining B based on A does not mean determining B only based on A. B can also be determined based on A and / or other information.

[0273] In the embodiments of this application, the term "and / or" is merely a description of the associated relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this article generally means that the associated objects before and after are in an "or" relationship.

[0274] In the embodiments of this application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic and should not constitute any limitation to the implementation process of the embodiments of this application.

[0275] In several embodiments provided by this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0276] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0277] In addition, in each embodiment of this application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0278] As mentioned above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claimed rights.

Claims

1. A method for wireless communication, characterized in that: include: The first terminal device determines a first resource related to half-duplex communication according to the first indication information; Among them, the first terminal device is a RedCap device, the first resource is used for the first terminal device to perform uplink transmission and downlink reception in the non-terrestrial network NTN, the first resource is a time-frequency resource in a first resource pool, the time-frequency resource is a reserved resource, and the first resource includes multiple random access channel opportunities RO, and at least two ROs of the multiple ROs correspond to different synchronization signal blocks SSB respectively.

2. The method according to claim 1, characterized in that The multiple ROs are used for the first terminal device to perform random access in half-duplex mode, and the first indication information is used for the first terminal device to determine the multiple ROs.

3. The method according to claim 2, characterized in that The first indication information includes a first identifier, the multiple ROs carry the first identifier, and the first identifier is used to indicate that the multiple ROs are used for half-duplex communication.

4. The method according to claim 2, characterized in that: The first indication information is used to indicate a first RO group, the first RO group includes the plurality of ROs, and the first RO group is an RO group used for half-duplex communication among the plurality of RO groups.

5. The method according to claim 1, characterized in that The at least two ROs include a first RO at an earlier time domain position and a second RO at a later time domain position, and the time domain position RO′ of the second RO is: RO′=RO+2 μ ×K cell,offset ; Wherein, RO represents the time domain position of the first RO, μ is related to the subcarrier spacing, and K cell,offset Indicates the first offset value.

6. The method according to claim 2, characterized in that The plurality of ROs correspond to a first SSB group supporting half-duplex communication, the first indication information is used to indicate the first SSB group, and the method further includes: The first terminal device sends capability information of supporting half-duplex communication to the network device, where the capability information is used to trigger the network device to group multiple SSBs to determine the first indication information; The first terminal device selects multiple SSBs corresponding to the multiple ROs in the first SSB group according to the first indication information.

7. The method according to any one of claims 1 to 6, characterized in that The first resource pool is used to support uplink transmission in half-duplex mode for multiple terminal devices, and the multiple terminal devices include the first terminal device.

8. The method according to claim 7, characterized in that The position of the first resource in the first resource pool is determined according to one or more of the following information: The service levels of the plurality of terminal devices; resources required by the first terminal device; The signal strength and / or reference path loss corresponding to the first terminal device; and The number of negative acknowledgements NACK received by the first terminal device.

9. The method according to claim 7, characterized in that: The method further comprises: The first terminal device sends a first request within a first time period, where the first request is used to request information of the first resource pool and allocation information of the first resource from a network device.

10. The method according to claim 9, characterized in that The method further comprises: The first terminal device receives feedback information of uplink transmission, where the feedback information includes NACK; When the number of NACKs received by the first terminal device reaches a first threshold, the first terminal device sends the first request.

11. The method according to claim 7, characterized in that When the size of remaining resources in the first resource pool is smaller than the size of resources required by the first terminal device, the first indication information includes indication information for dynamically allocating resources.

12. The method according to any one of claims 1 to 6, characterized in that The first resource also includes one or more transmission windows of a first system information block SIB in a second time period, and the method further includes: The first terminal device preferentially receives the first SIB in any transmission window of the one or more transmission windows.

13. The method according to claim 12, characterized in that The first indication information is used to indicate configuration information of the one or more transmission windows, and the first SIB is SIB19.

14. The method according to any one of claims 1 to 6, characterized in that The first indication information is carried in one or more of the following information: system resource block SIB, radio resource control RRC and physical downlink control channel PDCCH.

15. The method according to any one of claims 1 to 6, characterized in that The first resource is determined according to a time domain position and a second offset value associated with the first indication information, and the second offset value is determined by an identification ID of the first terminal device and / or an ID of a terminal device set to which the first terminal device belongs.

16. The method according to claim 15, characterized in that The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset Indicates the time offset to compensate for NTN transmission delay, UE ID represents the ID of the first terminal device, N represents the time length of resources used for half-duplex communication, and L represents the time length of resources required for the service of the first terminal device.

17. The method according to claim 15, characterized in that The first terminal device is any terminal device in a terminal device group that multiplexes the same resource block, and the second offset value is determined according to an ID of the terminal device group.

18. The method according to claim 15, characterized in that The second offset value is also determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

19. The method according to claim 18, characterized in that The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset to compensate for NTN transmission delay, γ i It represents the priority of the terminal device group to which the first terminal device belongs, GroupID represents the ID of the terminal device group to which the first terminal device belongs, N represents the time length of resources used for half-duplex communication, and L represents the time length of resources required for the service of the first terminal device.

20. A method for wireless communication, characterized in that: include: The network device sends first indication information to the first terminal device; Among them, the first terminal device is a RedCap device, the first indication information is used by the first terminal device to determine a first resource related to half-duplex communication, the first resource is used by the first terminal device to perform uplink transmission and downlink reception in a non-terrestrial network NTN, the first resource is a time-frequency resource in a first resource pool, the time-frequency resource is a reserved resource, and the first resource includes multiple random access channel opportunities RO, and at least two of the multiple ROs correspond to different synchronization signal blocks SSB, respectively.

21. The method according to claim 20, characterized in that The multiple ROs are used for the first terminal device to perform random access in half-duplex mode, and the first indication information is used for the first terminal device to determine the multiple ROs.

22. The method according to claim 21, characterized in that The first indication information includes a first identifier, the multiple ROs carry the first identifier, and the first identifier is used to indicate that the multiple ROs are used for half-duplex communication.

23. The method according to claim 21, characterized in that The first indication information is used to indicate a first RO group, the first RO group includes the plurality of ROs, and the first RO group is an RO group used for half-duplex communication among the plurality of RO groups.

24. The method according to claim 20, characterized in that The at least two ROs include a first RO at an earlier time domain position and a second RO at a later time domain position, and the time domain position RO′ of the second RO is: RO′=RO+2 μ ×K cell,offset ; Wherein, RO represents the time domain position of the first RO, μ is related to the subcarrier spacing, and K cell,offset Indicates the first offset value.

25. The method according to claim 21, characterized in that The plurality of ROs correspond to a first SSB group supporting half-duplex communication, the first indication information is used to indicate the first SSB group, and the method further includes: The network device receives capability information of supporting half-duplex communication sent by the first terminal device, and the capability information is used to trigger the network device to group multiple SSBs to determine the first indication information, and the first indication information is used by the first terminal device to select multiple SSBs corresponding to the multiple ROs in the first SSB group.

26. The method according to any one of claims 20 to 25, characterized in that The first resource pool is used to support uplink transmission in half-duplex mode for multiple terminal devices, and the multiple terminal devices include the first terminal device.

27. The method according to claim 26, characterized in that The position of the first resource in the first resource pool is determined according to one or more of the following information: The service levels of the plurality of terminal devices; resources required by the first terminal device; The signal strength and / or reference path loss corresponding to the first terminal device; and The number of negative acknowledgements NACK received by the first terminal device.

28. The method according to claim 27, characterized in that The method further comprises: The network device receives a first request sent by the first terminal device within a first time period, where the first request is used to request information of the first resource pool and allocation information of the first resource from the network device.

29. The method according to claim 28, characterized in that The method further comprises: The network device sends feedback information of uplink transmission to the first terminal device, where the feedback information includes NACK; When the number of NACKs received by the first terminal device reaches a first threshold, the network device receives the first request.

30. The method according to claim 26, characterized in that When the size of remaining resources in the first resource pool is smaller than the size of resources required by the first terminal device, the first indication information includes indication information for dynamically allocating resources.

31. The method according to any one of claims 20 to 25, characterized in that The first resource also includes one or more transmission windows of a first system information block SIB in a second time period, and the method further includes: The network device sends the first SIB in the one or more transmission windows respectively.

32. The method according to claim 31, characterized in that The first indication information is used to indicate configuration information of the one or more transmission windows, and the first SIB is SIB19.

33. The method according to any one of claims 20 to 25, characterized in that The first indication information is carried in one or more of the following information: system resource block SIB, radio resource control RRC and physical downlink control channel PDCCH.

34. The method according to any one of claims 20 to 25, characterized in that The first resource is determined according to a time domain position and a second offset value associated with the first indication information, and the second offset value is determined by an identification ID of the first terminal device and / or an ID of a terminal device set to which the first terminal device belongs.

35. The method according to claim 34, characterized in that The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset for compensating the NTN transmission delay, UEID represents the ID of the first terminal device, N represents the time length of the resources used for half-duplex communication, and L represents the time length of the resources required for the service of the first terminal device.

36. The method according to claim 34, characterized in that The first terminal device is any terminal device in a terminal device group that multiplexes the same resource block, and the second offset value is determined according to an ID of the terminal device group.

37. The method according to claim 34, characterized in that The second offset value is also determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

38. The method according to claim 37, characterized in that The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset to compensate for NTN transmission delay, γ i It represents the priority of the terminal device group to which the first terminal device belongs, GroupID represents the ID of the terminal device group to which the first terminal device belongs, N represents the time length of resources used for half-duplex communication, and L represents the time length of resources required for the service of the first terminal device.

39. A terminal device, characterized in that: The terminal device is a first terminal device, and the terminal device includes: A determining unit, configured to determine a first resource related to half-duplex communication according to the first indication information; Among them, the first terminal device is a RedCap device, the first resource is used for the first terminal device to perform uplink transmission and downlink reception in the non-terrestrial network NTN, the first resource is a time-frequency resource in a first resource pool, the time-frequency resource is a reserved resource, and the first resource includes multiple random access channel opportunities RO, and at least two ROs of the multiple ROs correspond to different synchronization signal blocks SSB respectively.

40. The terminal device according to claim 39, characterized in that: The multiple ROs are used for the first terminal device to perform random access in half-duplex mode, and the first indication information is used for the first terminal device to determine the multiple ROs.

41. The terminal device according to claim 40, characterized in that: The first indication information includes a first identifier, the multiple ROs carry the first identifier, and the first identifier is used to indicate that the multiple ROs are used for half-duplex communication.

42. The terminal device according to claim 40, characterized in that: The first indication information is used to indicate a first RO group, the first RO group includes the plurality of ROs, and the first RO group is an RO group used for half-duplex communication among the plurality of RO groups.

43. The terminal device according to claim 39, characterized in that: The at least two ROs include a first RO at an earlier time domain position and a second RO at a later time domain position, and the time domain position RO′ of the second RO is: RO′=RO+2 μ ×K cell,offset ; Wherein, RO represents the time domain position of the first RO, μ is related to the subcarrier spacing, and K cell,offset Indicates the first offset value.

44. The terminal device according to claim 40, characterized in that: The multiple ROs correspond to a first SSB group supporting half-duplex communication, the first indication information is used to indicate the first SSB group, and the terminal device further includes: A first sending unit, configured to send capability information of supporting half-duplex communication to a network device, wherein the capability information is used to trigger the network device to group multiple SSBs to determine the first indication information; The determining unit is further used to select multiple SSBs corresponding to the multiple ROs in the first SSB group according to the first indication information.

45. The terminal device according to any one of claims 39 to 44, characterized in that: The first resource pool is used to support uplink transmission in half-duplex mode for multiple terminal devices, and the multiple terminal devices include the first terminal device.

46. ​​The terminal device according to claim 45, characterized in that: The position of the first resource in the first resource pool is determined according to one or more of the following information: The service levels of the plurality of terminal devices; resources required by the first terminal device; The signal strength and / or reference path loss corresponding to the first terminal device; and The number of negative acknowledgements NACK received by the first terminal device.

47. The terminal device according to claim 45, characterized in that: The terminal device further includes: The second sending unit is used to send a first request within a first time period, where the first request is used to request the network device for information about the first resource pool and allocation information of the first resource.

48. The terminal device according to claim 47, characterized in that: The terminal device further includes: A first receiving unit, configured to receive feedback information of uplink transmission, where the feedback information includes NACK; The second sending unit is further configured to send the first request when the number of NACKs received by the first terminal device reaches a first threshold.

49. The terminal device according to claim 45, characterized in that: When the size of remaining resources in the first resource pool is smaller than the size of resources required by the first terminal device, the first indication information includes indication information for dynamically allocating resources.

50. The terminal device according to any one of claims 39 to 44, characterized in that: The first resource also includes one or more transmission windows of a first system information block SIB in a second time period, and the terminal device also includes: The second receiving unit is configured to preferentially receive the first SIB in any transmission window of the one or more transmission windows.

51. The terminal device according to claim 50, characterized in that: The first indication information is used to indicate configuration information of the one or more transmission windows, and the first SIB is SIB19.

52. The terminal device according to any one of claims 39 to 44, characterized in that: The first indication information is carried in one or more of the following information: system resource block SIB, radio resource control RRC and physical downlink control channel PDCCH.

53. The terminal device according to any one of claims 39 to 44, characterized in that: The first resource is determined according to a time domain position and a second offset value associated with the first indication information, and the second offset value is determined by an identification ID of the first terminal device and / or an ID of a terminal device set to which the first terminal device belongs.

54. The terminal device according to claim 53, characterized in that: The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset for compensating the NTN transmission delay, UEID represents the ID of the first terminal device, N represents the time length of the resources used for half-duplex communication, and L represents the time length of the resources required for the service of the first terminal device.

55. The terminal device according to claim 53, characterized in that: The first terminal device is any terminal device in a terminal device group that multiplexes the same resource block, and the second offset value is determined according to an ID of the terminal device group.

56. The terminal device according to claim 53, characterized in that: The second offset value is also determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

57. The terminal device according to claim 56, characterized in that: The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset to compensate for NTN transmission delay, γ i It represents the priority of the terminal device group to which the first terminal device belongs, GroupID represents the ID of the terminal device group to which the first terminal device belongs, N represents the time length of resources used for half-duplex communication, and L represents the time length of resources required for the service of the first terminal device.

58. A network device, characterized in that: include: A sending unit, configured to send first indication information to a first terminal device; Among them, the first terminal device is a RedCap device, the first indication information is used by the first terminal device to determine a first resource related to half-duplex communication, the first resource is used by the first terminal device to perform uplink transmission and downlink reception in a non-terrestrial network NTN, the first resource is a time-frequency resource in a first resource pool, the time-frequency resource is a reserved resource, and the first resource includes multiple random access channel opportunities RO, and at least two of the multiple ROs correspond to different synchronization signal blocks SSB, respectively.

59. The network device according to claim 58, characterized in that The multiple ROs are used for the first terminal device to perform random access in half-duplex mode, and the first indication information is used for the first terminal device to determine the multiple ROs.

60. The network device according to claim 59, characterized in that The first indication information includes a first identifier, the multiple ROs carry the first identifier, and the first identifier is used to indicate that the multiple ROs are used for half-duplex communication.

61. The network device according to claim 59, characterized in that: The first indication information is used to indicate a first RO group, the first RO group includes the plurality of ROs, and the first RO group is an RO group used for half-duplex communication among the plurality of RO groups.

62. The network device according to claim 58, characterized in that The at least two ROs include a first RO at an earlier time domain position and a second RO at a later time domain position, and the time domain position RO′ of the second RO is: RO′=RO+2 μ ×K cell,offset ; Wherein, RO represents the time domain position of the first RO, μ is related to the subcarrier spacing, and K cell,offset Indicates the first offset value.

63. The network device according to claim 59, characterized in that: The plurality of ROs correspond to a first SSB group supporting half-duplex communication, the first indication information is used to indicate the first SSB group, and the network device further includes: A first receiving unit is used to receive capability information of supporting half-duplex communication sent by the first terminal device, wherein the capability information is used to trigger the network device to group multiple SSBs to determine the first indication information, and the first indication information is used by the first terminal device to select multiple SSBs corresponding to the multiple ROs in the first SSB group.

64. The network device according to any one of claims 58 to 63, characterized in that: The first resource pool is used to support uplink transmission in half-duplex mode for multiple terminal devices, and the multiple terminal devices include the first terminal device.

65. The network device according to claim 64, characterized in that The position of the first resource in the first resource pool is determined according to one or more of the following information: The service levels of the plurality of terminal devices; resources required by the first terminal device; The signal strength and / or reference path loss corresponding to the first terminal device; and The number of negative acknowledgements NACK received by the first terminal device.

66. The network device according to claim 64, characterized in that The network device also includes: The second receiving unit is used to receive a first request sent by the first terminal device within a first time period, where the first request is used to request information of the first resource pool and allocation information of the first resource from a network device.

67. The network device according to claim 66, characterized in that The sending unit is further used to send feedback information of uplink transmission to the first terminal device, where the feedback information includes NACK; The second receiving unit is further configured to receive the first request when the number of NACKs received by the first terminal device reaches a first threshold.

68. The network device according to claim 64, characterized in that When the size of remaining resources in the first resource pool is smaller than the size of resources required by the first terminal device, the first indication information includes indication information for dynamically allocating resources.

69. The network device according to any one of claims 58 to 63, characterized in that: The first resource also includes one or more transmission windows of the first system information block SIB within the second time period, and the sending unit is further configured to send the first SIB within the one or more transmission windows respectively.

70. The network device according to claim 69, characterized in that The first indication information is used to indicate configuration information of the one or more transmission windows, and the first SIB is SIB19.

71. The network device according to any one of claims 58 to 63, characterized in that: The first indication information is carried in one or more of the following information: system resource block SIB, radio resource control RRC and physical downlink control channel PDCCH.

72. The network device according to any one of claims 58 to 63, characterized in that: The first resource is determined according to a time domain position and a second offset value associated with the first indication information, and the second offset value is determined by an identification ID of the first terminal device and / or an ID of a terminal device set to which the first terminal device belongs.

73. The network device according to claim 72, characterized in that The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset for compensating the NTN transmission delay, UEID represents the ID of the first terminal device, N represents the time length of the resources used for half-duplex communication, and L represents the time length of the resources required for the service of the first terminal device.

74. The network device according to claim 72, characterized in that The first terminal device is any terminal device in a terminal device group that multiplexes the same resource block, and the second offset value is determined according to an ID of the terminal device group.

75. The network device according to claim 72, characterized in that The second offset value is also determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

76. The network device according to claim 75, characterized in that The time domain position of the first resource is: Among them, slot n represents the time domain position of the PDCCH carrying the first indication information, K2 represents the time offset between the PDCCH and the corresponding uplink channel, K offset represents the time offset to compensate for NTN transmission delay, γ i It represents the priority of the terminal device group to which the first terminal device belongs, GroupID represents the ID of the terminal device group to which the first terminal device belongs, N represents the time length of resources used for half-duplex communication, and L represents the time length of resources required for the service of the first terminal device.

77. A communication device, characterized in that: It comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method as described in any one of claims 1-38.

78. A communication device, characterized in that: Comprising a processor, configured to call a program from a memory to execute a method as claimed in any one of claims 1 to 38.

79. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 38.

80. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 38.

81. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 38.

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