Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device, aiming at allowing for the terminal device to execute wireless communication based on a half-duplex mode in an NTN system having a long transmission delay. The method comprises: a first terminal device determines, on the basis of first indication information, a first resource related to half-duplex communication, wherein the first resource is used by the first terminal device to perform uplink transmission and / or downlink reception in an NTN.

Description

Method, terminal equipment and network equipment for wireless communication Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a method, terminal equipment, and network equipment for wireless communication. Background Art

[0002] Certain communication systems, such as non-terrestrial networks (NTNs), experience significant transmission delays. In these systems, if a terminal device communicates in half-duplex mode, its uplink transmission may conflict with its downlink reception, or with transmissions from other terminals. Therefore, resolving transmission conflicts in half-duplex mode has become a pressing technical issue in these systems.

[0003] Summary of the Invention

[0004] The present application provides a method, terminal device, and network device for wireless communication. The following describes various aspects of the embodiments of the present application.

[0005] 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 based on first indication information; wherein the first resource is used by the first terminal device for uplink transmission and / or downlink reception in an NTN.

[0006] 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 by the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used by the first terminal device to perform uplink transmission and / or downlink reception in the NTN.

[0007] According to a third aspect, a terminal device is provided, wherein the terminal device is a first terminal device, and the terminal device includes: a determination unit, configured to determine a first resource related to half-duplex communication based on first indication information; wherein the first resource is used by the first terminal device for uplink transmission and / or downlink reception in the NTN.

[0008] In a fourth aspect, a network device is provided, comprising: a sending unit for sending first indication information to a first terminal device; wherein the first indication information is used by the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used by the first terminal device for uplink transmission and / or downlink reception in the NTN.

[0009] In a fifth aspect, a communication device is provided, comprising 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 described in the first aspect or the second aspect.

[0010] In a sixth aspect, a device is provided, comprising a processor for calling a program from a memory to execute the method as described in the first aspect or the second aspect.

[0011] In a seventh aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the first aspect or the second aspect.

[0012] In an eighth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.

[0013] In a ninth aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.

[0014] In a tenth aspect, a computer program is provided, which enables a computer to execute the method as described in the first aspect or the second aspect.

[0015] In the embodiments of the present application, a first terminal device can determine a first resource for half-duplex communication based on the first indication information. The first resource is used by the first terminal device for wireless communication within the NTN. Thus, in an NTN system with long transmission delays, even if the timing advance of the network device and the first terminal device are not aligned, the first terminal device can still perform uplink transmission and / or downlink reception on the resources dedicated to half-duplex, thereby avoiding conflicts with the first terminal device's downlink reception or transmissions from other terminal devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a wireless communication system used in an embodiment of the present application.

[0017] FIG2 is an NTN system used in an embodiment of the present application.

[0018] FIG3 is another NTN system applied in an embodiment of the present application.

[0019] FIG4 is a schematic diagram of two timing modes for scheduling uplink channels in the NTN system.

[0020] FIG5 is a flow chart of a method for wireless communication provided in an embodiment of the present application.

[0021] FIG6 is a flowchart of a possible implementation of the method shown in FIG5 .

[0022] FIG7 is a schematic diagram of a possible implementation of the method shown in FIG5 .

[0023] FIG8 is a schematic diagram of another possible implementation of the method shown in FIG5 .

[0024] FIG9 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0025] FIG10 is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0026] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. With respect to the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] The embodiments of the present application can be applied to various communication systems. For example, the embodiments of the present application can be applied to global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, advanced long term evolution (LTE-A) system, new radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, universal mobile telecommunication system (UMTS), wireless local area networks (WLAN), wireless fidelity (WiFi), fifth generation communication (5th-generation, 5G) system. The embodiments of the present application can also be applied to other communication systems, such as future communication systems. The future communication system may be, for example, a sixth-generation (6G) mobile communication system or a satellite communication system.

[0029] Traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, 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 machine type communication (eMTC), vehicle to vehicle (V2V) communication, and vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to communication systems that support the above-mentioned communication methods.

[0030] The communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0031] The communication system in the embodiments of the present application can be applied to unlicensed spectrum. The unlicensed spectrum can also be considered a shared spectrum. Alternatively, the communication system in the embodiments of the present application can also be applied to licensed spectrum. The licensed spectrum can also be considered a dedicated spectrum.

[0032] The 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, an NR-based NTN system, an Internet of Things (IoT)-based NTN system, or a narrowband Internet of Things (NB-IoT)-based NTN system.

[0033] A communication system may include one or more terminal devices. The terminal devices mentioned in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber 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.

[0034] 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, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a next-generation communication system (e.g., a NR system), or a terminal device in a future-evolved public land mobile network (PLMN) network.

[0035] In some embodiments, a 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, an in-vehicle device, etc. with wireless connection capabilities. As some specific examples, the terminal device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc.

[0036] In some embodiments, the terminal device can be deployed on land. For example, the terminal device can be deployed indoors or outdoors. In some embodiments, the terminal device can be deployed on the water, such as on a ship. In some embodiments, the terminal device can be deployed in the air, such as on an airplane, a balloon, or a satellite.

[0037] In addition to the terminal device, the communication system may also include one or more network devices. The network device in the embodiment of the present application may be a device for communicating with the terminal device, and the network device may also be referred to as an access network device or a radio access network device. The network device may be, for example, a base station. The network device in the embodiment of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point (AP), transmission point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0038] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0039] 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 may include a CU and a DU. The gNB may also include an AAU.

[0040] By way of example and not limitation, in embodiments of the present application, a network device may be mobile, for example, a mobile device. In some embodiments of the present application, the network device may be a satellite or balloon station. In some embodiments of the present application, the network device may also be a base station located on land, water, or the like.

[0041] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0042] For example, Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. As shown in Figure 1, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or also referred to as a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located within the coverage area.

[0043] FIG1 exemplarily shows a network device and two terminal devices. In some embodiments of the present application, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited.

[0044] For example, Figure 2 illustrates an architecture diagram of the aforementioned NTN system. NTN system 200 in Figure 2 utilizes satellite 210 as an aerial platform. As shown in Figure 2, the satellite radio access network includes satellite 210, service link 220, feeder link 230, terminal equipment 240, gateway (GW) 250, and network 260, including base stations and a core network.

[0045] Satellite 210 is a spacecraft based on a space platform. Service link 220 refers to the link between satellite 210 and terminal device 240. Feeder link 230 refers to the link between gateway 250 and satellite 210. The earth-based gateway 250 connects satellite 210 to a base station or core network, depending on the selected NTN architecture.

[0046] The NTN architecture shown in Figure 2 is a bent-pipe transponder architecture. In this architecture, a base station is located on Earth behind gateway 250, with satellite 210 acting as a relay. Satellite 210 operates as a relay, forwarding signals from feeder link 230 to service link 220, or vice versa. In other words, satellite 210 does not function as a base station; communications between terminal device 240 and base stations in network 260 must be relayed through satellite 210.

[0047] Figure 3 illustrates another NTN system architecture. As shown in Figure 3, satellite radio access network 300 includes satellite 310, service link 320, feeder link 330, terminal equipment 340, gateway 350, and network 360. Unlike Figure 2, satellite 310 has a base station 312, while network 360 behind gateway 350 consists solely of a core network.

[0048] The NTN architecture shown in Figure 3 is a regenerative transponder architecture. In this architecture, satellite 310 carries base station 312, which can be directly connected to the Earth-based core network via a link. Satellite 310 functions as a base station, and terminal device 340 can communicate directly with satellite 310. Therefore, satellite 310 can be referred to as a network device.

[0049] The communication system of the architecture shown in Figures 2 and 3 may include multiple network devices, and each network device may include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0050] In the embodiment of the present application, the communication system shown in Figures 1 to 3 may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but the embodiment of the present application does not limit this.

[0051] It should be understood that in the embodiments of the present application, a device having a communication function in a network / system may be referred to as a communication device. Taking the communication system 100 shown in FIG1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function. The network device 110 and the terminal device 120 may be the specific devices described above and will not be described in detail here. The communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in the embodiments of the present application.

[0052] For ease of understanding, some relevant technical knowledge involved in the embodiments of this application is first introduced. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least part of the following contents.

[0053] As communication technologies develop, communication systems (e.g., 5G) will integrate the market potential of satellite and terrestrial network infrastructure. For example, the 5G standard makes NTN, including satellite segments, part of the recognized 3rd Generation Partnership Project (3GPP) 5G connectivity infrastructure.

[0054] NTN refers to a network or network segment that utilizes radio frequency (RF) resources on satellite or unmanned aerial system (UAS) platforms. Taking satellites as an example, communications satellites are categorized by orbital altitude into low Earth orbit (LEO), medium Earth orbit (MEO), geostationary Earth orbit (GEO), and high elliptical orbit (HEO). LEO is an Earth-centered orbit with an altitude of 2,000 kilometers or less, or with at least 11.25 cycles per day and an eccentricity of less than 0.25. Most man-made objects in outer space are located in LEO. LEO satellites orbit the Earth at high speed (mobility) but in predictable or deterministic orbits.

[0055] Satellites at different orbital altitudes have different orbital periods. For example, LEO typically has an altitude of 250-1500 kilometers and an orbital period of 90-120 minutes. MEO typically has an altitude of 5000-25000 kilometers and an orbital period of 3-15 hours. GEO has an altitude of approximately 35786 kilometers and an orbital period of 24 hours.

[0056] As shown in Figures 2 and 3, which used satellites as examples, typical scenarios for terminal devices accessing the NTN system involve either an NTN transparent payload or an NTN regenerative payload. The bent-pipe transponder architecture shown in Figure 2 corresponds to the NTN transparent payload, while the regenerative transponder architecture shown in Figure 3 corresponds to the NTN regenerative payload.

[0057] In an NTN system, ground-based terminal devices communicate wirelessly via an airborne platform. Unlike terrestrial networks (TNs), NTNs typically experience significant transmission delays. For example, because satellites are typically located hundreds of kilometers above the Earth's surface, propagation delays in NTNs are significantly longer. Specifically, NTN propagation delays range from a few milliseconds to hundreds of milliseconds, depending on the altitude of the satellite or airborne platform and the type of payload in the NTN.

[0058] Due to the large propagation delay, related issues may need to be addressed when deploying technologies in terrestrial networks in NTN systems. For example, in Release-17 (Rel-17) and Rel-18 of IoT NTN, NB-IoT technology has been enhanced to support NTN.

[0059] With the development of IoT technology, reduced capability (RedCap) terminal devices can effectively provide services in many IoT-like use cases besides NB-IoT. In other words, RedCap devices also need to be used in NTN systems.

[0060] RedCap is a new type of terminal capability information introduced in Rel-17. RedCap-related terminal devices can have reduced complexity and new power-saving features, making them more conducive to large-scale commercial applications in 5G commercial networks. Taking NR as an example, RedCap can reduce device capabilities by reducing bandwidth, the number of transmitting and receiving antennas, lowering the rate, adjusting the modulation method, and introducing half-duplex mode, thereby reducing the complexity of terminal devices and achieving a series of goals such as reducing terminal costs, power consumption, and extending service life. Therefore, the requirements of RedCap differ from those of LTE-based IoT (LTE for machines, LTE-M) and NB-IoT.

[0061] As can be seen from the above, RedCap supports half-duplex (HD) working mode. In the half-duplex frequency division multiplexed (FDD) working mode, the communication device can transmit and receive at different times and different frequencies. Compared with full-duplex FDD (FD FDD), half-duplex FDD (HD FDD) does not require a duplexer, thereby reducing complexity and cost. When RedCap adopts HD FDD mode, it can save about 7% of the cost. For example, half-duplex FDD equipment can relax the requirements for devices in the RF front-end and use lower-cost transmit and receive antenna switches and low-pass filters to replace the duplexer.

[0062] Furthermore, to provide the network with flexible control and management over different types of terminal devices, relevant standards support early identification and access control for RedCap terminal devices. This allows the network to implement tailored scheduling. For example, the network can adjust terminal device access based on network resources and load, preventing RedCap terminal devices from overusing network resources and minimizing the performance impact on traditional terminal devices.

[0063] However, the introduction of half-duplex FDD has brought challenges to the scheduling of network equipment. Taking the scheduling method in the NR system as an example, network equipment has multiple scheduling methods for different signals, including semi-static scheduling and dynamic scheduling.

[0064] For example, in order to adapt to the propagation delay in NTN, a scheduling time offset (K offset ). K offset It can be used to resolve the timing relationship between the scheduling and transmission of various uplink communications to compensate for the propagation delay in the NTN.

[0065] Taking the timing of 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 called "K2" timing. Among them, K2 can be the time offset between the transmission of PDCCH communication and the reception of its scheduled PUSCH communication.

[0066] For example, the relative position of 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 PUSCH are in the same time slot, K2=1 indicates that the PUSCH is in a time slot after the PDCCH, and K2=2 indicates that the PUSCH is in two time slots after the PDCCH.

[0067] As an example, in the NTN system, K offset Can be used to determine the timing from PDCCH to PUSCH in NTN. For example, K offset Adding K2 can extend the offset between PDCCH and PUSCH to compensate for the propagation delay in the NTN.

[0068] As an example, when the round trip delay (RTD) between the terminal device and the network device has a negative offset, the time when the terminal device transmits the PUSCH can be determined based on K offset , K2 and RTD are determined together.

[0069] For ease of understanding, the above two timing modes are schematically illustrated below with reference to Figure 4. Referring to Figure 4, a base station in an NTN may send a PDCCH to a terminal device in time slot n. For example, the base station may send the PDCCH via a satellite.

[0070] As shown in FIG4 , the terminal device can receive the PDCCH sent by the base station in time slot n. In case 1, the terminal device can receive the PDCCH sent by the base station in time slot n based on the K offset of time slot n. offset In case 2, the RTD between the terminal device and the network device is negative, and the terminal device can transmit PUSCH at n+K offset +K2-RTD position transmission PUSCH.

[0071] In the two timing modes shown in Figure 4, a terminal device may need to simultaneously receive downlink (DL) and transmit uplink (UL). However, in half-duplex FDD technology, uplink and downlink transmissions must occur at different times, so collisions between uplink and downlink transmissions may occur.

[0072] Furthermore, in NTN systems, there is significant propagation delay in both uplink and downlink. Due to the unique characteristics of NTN systems, HD FDD technology may lead to more complex conflict scenarios. Possible conflict scenarios include, but are not limited to, random access procedures and PUSCH transmissions.

[0073] For example, the NTN system will also support frequency band (frequency range 2, FR2) in the future. Similar to NR random access, each SSB in a set of synchronization signal blocks (SSBs) can be associated with a different downlink beam. It should be noted that the SSB in the embodiment of the present application can also represent a synchronization signal / physical broadcast channel block (SS / PBCH block).

[0074] During the random access procedure, 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 (RACH occasion, RO) associated with the selected SSB to indicate its selection to the network device. The network device can pre-define the mapping between SSBs and ROs. Therefore, by detecting on which RO the terminal device performs PRACH transmission, the network device can determine which downlink beam the terminal device has selected based on the mapping between SSBs and ROs.

[0075] However, in HD FDD transmission, the information between transmission and scheduling can be opaque. This means that HD FDD operation can cause uplink and downlink transmission and scheduling to obscure each other. Furthermore, considering the communication latency in the NTN system, a terminal device may miss the corresponding RO after selecting an SSB. Therefore, the RO set by the network cannot be used as it does in terrestrial networks. Therefore, even if the NTN network pre-schedules or sets the relationship between SSBs and ROs, conflicts may occur between multiple HD FDD-enabled terminal devices, or with other terminal devices operating in FD FDD mode.

[0076] For example, in the NTN system, there will be a long round trip time (RTT) delay in uplink and downlink transmission. Usually, 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, the 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 the transmission of multiple downlink time slots colliding with the uplink transmission. For example, during the initial access process of the NTN, the UL time slot may conflict with multiple DL time slots.

[0077] As an example, in a TN system, the time slot index (TA) is typically smaller, allowing the DL and UL time slot indices and symbol indices to be aligned between the base station and the terminal device. Specifically, the terminal device can adjust the TA based on instructions from the base station, so the base station and the terminal device have a common understanding of overlapping DL and UL symbols and non-overlapping symbols without sufficient gaps. Therefore, in a TN system, the system performance degradation caused by conservative scheduling at the base station due to potential TA misalignment is acceptable. However, in an NTN system, terminal devices automatically compensate for TA based on their own location and the ephemeris of the serving satellite. Therefore, in the absence of sufficient gaps, the base station and the terminal device may have significant misalignment when determining DL and UL overlapping or non-overlapping symbols. Although terminal devices can report 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. In other words, infrequent reporting can cause this misalignment. For example, 3GPP TS 38.321 defines this reporting granularity as 1 millisecond. When a terminal device reports its TA based on a reporting granularity of 1 millisecond, the misalignment error between the last known TA of the base station and the actual TA used by the terminal device can reach 16 milliseconds.

[0078] For example, in NR NTN, terminal devices need to receive system information blocks (SIBs) for communication. For example, terminal devices need to read SIB19 from time to time to keep the ephemeris table up to date. Specifically, the terminal device can determine when to read SIB19 based on the validity of the ephemeris table and the time when SIB19 was last obtained. Because SIB19 is broadcast periodically and there are many SIB19 transmissions during the validity period of the ephemeris table, full-duplex terminal devices have many opportunities to read SIB19. However, for half-duplex terminal devices, potential conflicts between UL transmissions and SIB19 transmissions may deprive them of the opportunity to read SIB19. Therefore, this conflict may result in a loss of UL throughput for the terminal device and may degrade or exclude some UL services for half-duplex terminal devices. For example, if an UL voice packet is transmitted 16 times every 20 milliseconds, it is almost impossible to avoid conflicts between the PUSCH carrying voice and the SIB19 transmission through base station scheduling. This conflict may result in unacceptable voice quality and a loss of the opportunity to read SIB19.

[0079] In summary, when half-duplex-capable technologies like RedCap are applied to NTN systems, the possibility of supporting half-duplex operation through NTN-specific designations needs to be studied. Therefore, how to deploy half-duplex-capable terminal devices in NTN systems and how to avoid conflicts that may occur in half-duplex operation are both urgent technical issues that need to be addressed.

[0080] It should be noted that the above-mentioned problem of conflicts in uplink and downlink transmissions of the NTN system due to RedCap's support for half-duplex mode is only an example. The embodiments of the present application can be applied to communication scenarios of any type of terminal equipment supporting half-duplex communication in the NTN system.

[0081] To address the above issues, embodiments of the present application provide a method for wireless communication. Using this method, a first terminal device can determine a first resource related to half-duplex communication based on first indication information. Thus, the first indication information can be used by the terminal device to determine uplink transmission and / or downlink reception resources based on half-duplex mode, thereby avoiding conflicts between uplink and downlink transmissions of the first terminal device.

[0082] For ease of understanding, the method for wireless communication proposed in an embodiment of the present application is described in detail below in conjunction with Figure 5. Figure 5 is an introduction from the perspective of the interaction between the first terminal device and the network device. The dotted line portion in Figure 5 indicates that the process is optional.

[0083] 5 , in step S510 , a first terminal device receives first indication information sent by a network device.

[0084] The first terminal device may be a communication device that performs uplink transmission to the network device, which is not limited here.

[0085] In some embodiments, the first terminal device may be a terminal device in an NTN system or a terminal device acting as a relay, such as a UE. In some embodiments, the first terminal device may be a terminal device in an NB-IoT system. In some embodiments, the first terminal device may be a terminal device in a network with a long communication latency or a terminal device acting as a relay.

[0086] 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.

[0087] As an embodiment, the first terminal device is a communication device that performs uplink transmission to a device on the network side in any communication system.

[0088] In some embodiments, the first terminal device is a terminal device supporting half-duplex communication or a terminal device serving as a relay. For example, the first terminal device is the RedCap device described above. In another example, the first terminal device is a low-energy device supporting half-duplex communication.

[0089] As an example, the first terminal device may support half-duplex mode and other modes simultaneously, such as full-duplex mode.

[0090] The network device can be a network device or a network-side device in any communication system with a long RTD. An example of a communication system with a long RTD is an 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. For example, when the base station is deployed on the satellite, the first terminal device communicates directly with the base station on the satellite. For example, when the satellite serves as a relay, the first terminal device communicates with the network device located on the ground via the satellite.

[0091] As an embodiment, when the network device includes a satellite, the first terminal device is located in a service area of ​​the satellite at a current moment to receive the first information via the satellite.

[0092] In some embodiments, the first terminal device may be one of multiple terminal devices. For example, the first terminal device may be any one of the multiple terminal devices. A second terminal device other than the first terminal device among the multiple terminal devices may receive the second indication information sent by the network device, or may receive the first indication information together with the first terminal device, without limitation herein.

[0093] In some embodiments, the plurality of terminal devices may form a terminal device group or a terminal device set. Since the plurality of terminal devices belong to a terminal device set, the network device may send indication information to the plurality of terminal devices based on the set.

[0094] As an embodiment, when the network device includes a satellite, multiple terminal devices in the terminal device group are all located in the service area of ​​the satellite at the current moment, so as to receive indication information corresponding to each terminal device via the satellite.

[0095] 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, the communication device may perform wireless communication in half-duplex mode within the resources. In some embodiments, wireless communication in half-duplex mode may be uplink transmission during random access, such as PRACH transmission during initial access. In some embodiments, wireless communication in half-duplex mode may be transmission of an uplink channel, such as PUSCH transmission. In some embodiments, wireless communication in half-duplex mode may also be reception of downlink transmission, such as a terminal device reading a downlink channel or SIB sent by a network device.

[0096] The first indication information may be sent directly by the network device to the terminal device, or may be indicated via 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 that the network device can send it to the terminal device. The PDCCH may include DCI. In some embodiments, the first indication information may be included in a resource identifier so that resources related to half-duplex can be indicated via higher-layer signaling or configuration information.

[0097] As an example, the first indication information may include a semi-static configuration performed by a higher layer for each channel. The configuration may include, but is not limited to, a configured grant (CG)-PUSCH, downlink semi-persistent scheduling (SPS), and a physical uplink control channel (PUCCH). For example, the first indication information may include SIB information or dedicated RRC signaling of the terminal device.

[0098] As an example, the first indication information may include an authorization message related to resource allocation, so as to facilitate determination of the first resource.

[0099] In some embodiments, the first indication information may indicate a first resource dedicated to the first terminal device, or may indicate a resource 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.

[0100] The first indication information can be used by the first terminal device to determine the first resource related to half-duplex communication. In other words, the first indication information can be used by the first terminal device to determine the resource for uplink and downlink transmission when performing half-duplex communication.

[0101] In some embodiments, the first indication information may be determined based on a communication scenario of the first terminal device in half-duplex mode. The communication scenario of the first terminal device includes but is not limited to the aforementioned random access process, PUSCH transmission, and other scenarios.

[0102] In step S520, the first terminal device determines a first resource related to half-duplex communication according to the first indication information.

[0103] The first resource is used by the first terminal device to perform half-duplex communication in the network. That is, the first resource is a dedicated resource for half-duplex mode to avoid conflicts with other modes. In some embodiments, half-duplex communication includes uplink transmission and / or downlink reception based on the half-duplex mode. That is, the first resource can be an uplink transmission resource or a downlink transmission resource.

[0104] Exemplarily, the first resource may be a time-frequency resource of any size, which is not limited here.

[0105] Exemplarily, the first resource may be used by the first terminal device for uplink transmission and / or downlink reception in the NTN. In other words, the first resource is a dedicated resource allocated by the network device to the first terminal device.

[0106] Exemplarily, the first resource is used by the first terminal device to perform one or more of the following wireless communications in the NTN: random access in half-duplex mode; uplink channel transmission in half-duplex mode; and first SIB reception in half-duplex mode.

[0107] For example, the first resource can be used for uplink transmission by the first terminal device in half-duplex mode on the NTN. In other words, 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 a first uplink resource or a half-duplex uplink dedicated resource. In this scenario, the first resource can prevent conflicts between the uplink transmission and downlink transmission of the first terminal device.

[0108] For example, the first resource can be used for downlink reception by the first terminal device in half-duplex mode on the NTN. In other words, the first resource is a dedicated resource for the first terminal device to perform downlink reception in half-duplex mode, and can also be referred to as a first downlink resource or a half-duplex downlink dedicated resource. In this scenario, the first resource can ensure downlink reception by the first terminal device, thereby avoiding missing necessary downlink data reading.

[0109] For another example, the first resource can be used for the first terminal device to perform uplink transmission and downlink reception in half-duplex mode in the NTN. In other words, the first resource can be used for the first terminal device to determine dedicated half-duplex transmission resources to avoid conflicts with other terminal devices.

[0110] In some embodiments, the first resource may be related to a communication scenario of the first terminal device. The communication scenario is as described above and will not be repeated here.

[0111] In some embodiments, in a random access scenario, the first resource may include one or more ROs used by the first terminal device to perform random access in half-duplex mode. In this scenario, the first indication information may be used to indicate the one or more ROs.

[0112] Exemplarily, the first indication information may include a first identifier dedicated to half-duplex communication. One or more ROs for the first terminal device may carry the first identifier. Therefore, the first terminal device may determine one or more ROs for random access based on the first identifier to avoid conflicts with RO resources of other terminal devices or other modes (e.g., full-duplex FDD mode).

[0113] As an example, the first identifier can be the RO_HD identifier. That is, the RO used in half-duplex mode will be identified as RO_HD. Optionally, for terminal devices accessed based on the HD FDD mode, only 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 identified to determine which ROs belong to HD FDD (identified by RO_HD) and which ROs belong to FD FDD, so as to avoid conflicts with other terminal devices.

[0114] For example, multiple ROs performing random access may be grouped to determine one or more ROs for half-duplex mode. In this scenario, the first indication information may indicate a first RO group for half-duplex communication. In other words, the first RO group among the multiple RO groups obtained after grouping may be used for half-duplex communication.

[0115] As an example, the grouped ROs may correspond to the same SSB or to multiple SSBs, which is not limited here. For example, multiple RO groups may correspond to the first SSB, that is, multiple RO groups correspond to the same SSB.

[0116] 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.

[0117] As an example, when grouping, the number of ROs contained in each group can be set through SIB information or RRC information.

[0118] For example, if there are two ROs in the frequency domain and three ROs in the time domain, a single SSB can have six ROs. These six ROs can be divided into two groups: {RO_FD, RO_HD}. The ROs in the two groups correspond to the FD FDD mode and the HD-FDD mode, respectively.

[0119] Exemplarily, when the first resource includes multiple ROs from one or more ROs, at least two of the multiple ROs correspond to different SSBs. Corresponding to different SSBs may mean that the multiple ROs used for random access by the first terminal device are scheduled across SSBs. When multiple ROs are scheduled across SSBs, it can address the situation where NTN network latency is relatively large.

[0120] As an example, since SSBs usually occur periodically, multiple ROs in the first resource may be scheduled in multiple SSBs.

[0121] As an example, when the HD FDD mode and the FD FDD mode correspond to the same SSB, the terminal device in half-duplex mode can determine one or more ROs in the first resource based on cross-SSB scheduling.

[0122] As an example, when an RO is scheduled across SSBs, the RO that is located later in the time domain can be determined based on the RO that is located earlier in the time domain. For example, the at least two ROs may include a first RO that is located earlier in the time domain and a second RO that is located later in the time domain. In the scenario of cross-SSB scheduling, the time domain position RO′ of the second RO may be:

[0123] RO'=RO+2 μ ×K cell,offset ;

[0124] Among them, 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.

[0125] Optionally, K cell,offset The value of can be provided by the parameter CellSpecific_Koffset of the RRC layer.

[0126] It should be noted that the cross-SSB scheduling RO method is not limited to the half-duplex mode. For example, in the NTN system, when the terminal device performs random access or other communications based on the full-duplex mode, the cross-SSB scheduling RO method is also applicable.

[0127] For example, considering the mapping relationship between SSB and RO, SSB may also be configured to avoid mapping different SSBs of HD FDD terminal devices and FD FDD terminal devices in the same service cell to the same RO.

[0128] As an example, the SSBs for HD FDD are allocated to different time slots or symbols than those for FD FDD.

[0129] As an example, multiple SSBs may be grouped to facilitate the first terminal device to determine the first resource. Optionally, a portion of the multiple SSBs is used for terminal devices in the cell that perform HD FDD mode, and another portion is used for terminal devices in the cell that perform FD FDD mode.

[0130] As an example, one or more ROs to which the first terminal device performs random access may correspond to any SSB in the first SSB group supporting half-duplex communication. That is, after the SSBs are grouped, they may include a first SSB group supporting half-duplex communication. The first indication information may be used to indicate the first SSB group.

[0131] As an example, a terminal device that supports half-duplex can report a capability indication to a network device. When the network device receives capability information indicating that a 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 indicating that a terminal device supports half-duplex can indicate support for both half-duplex and full-duplex, or only half-duplex, and this is not limited here.

[0132] For example, the first terminal device may send capability information supporting half-duplex communication to the network device. The capability information may trigger the network device to group multiple SSBs and determine first indication information. The first terminal device may select SSBs corresponding to one or more ROs for random access in the first SSB group based on the first indication information.

[0133] For example, below 6 GHz, a synchronization signal (SS) burst set contains 4-8 SSBs, meaning a maximum of 8 beams can be scanned. If the terminal device reports its capabilities to the network, indicating support for both HD FDD and FD FDD, or HD FDD, the network can group the SSBs within the SS burst set to correspond to different FDD modes. If the terminal device selects HD FDD mode, it selects the corresponding SSB from the predefined HD FDD-supported SSB group.

[0134] In some embodiments, after an RRC connection is established, a network device may reserve resources for multiple terminal devices supporting half-duplex mode. These reserved resources may form a first resource pool. This first resource pool may also be referred to as an HD FDD CG resource pool. For example, an NTN network device may reserve resources for terminal devices operating in HD FDD mode using the first resource pool.

[0135] As an example, the first resource pool may include multiple continuous time-frequency resources, or may include multiple discontinuous time-frequency resources.

[0136] As an example, the first resource pool is used to support uplink transmission of multiple terminal devices in half-duplex mode. The multiple terminal devices include the first terminal device, so the first resource is the time-frequency resource in the first resource pool.

[0137] Optionally, after receiving the first request from the first terminal device, the network device may send information about the first resource pool to the first terminal device. The first request is used by the first terminal device to request the network device to allocate resources for uplink communication in a future time slice.

[0138] As an example, the first request may include resource information required by the first terminal device, and may also include a variety of information such as the service type of the first terminal device to facilitate the network device to allocate the first resource to the first terminal device.

[0139] As an example, the first request is a scheduling request (SR). In half-duplex mode, the terminal device can send an SR to request uplink resources. The network device can allocate appropriate resources to the terminal device in advance to avoid uplink and downlink conflicts.

[0140] As an example, if the NTN network receives SRs from different terminal devices within a certain time period T, the base station can uniformly allocate uplink transmission resources to these terminal devices, where T is a rational number. For example, a first terminal device sends a first request within a first time period. The first request is used by the first terminal device to request information about a first resource pool and allocation information for a first resource from a network device.

[0141] Optionally, the length T of the first time period may be related to the relative positions of the network device and the terminal device. The position of the terminal device may be determined based on global navigation satellite system (GNSS) information or based on positioning information sent by the network device. The position of the network device may be determined based on parameters in a satellite ephemeris table.

[0142] As an example, when the first terminal device starts the HD FDD working mode, the base station sends an authorization (grant) message to the first terminal device. The authorization message may include first indication information. Optionally, the authorization message may carry information about the HD FDD CG resource pool and resource allocation information of the first terminal device. Optionally, after the RRC connection is established, the first terminal device may send SR information to the NTN network. The NTN network may allocate part or all of the resources required for the service to the first terminal device based on the first resource pool, and send specific resource information to the first terminal device through PDCCH DCI.

[0143] Optionally, the first terminal device may determine the first resource according to the first indication information. For example, the first indication information may be used by the first terminal device to determine the position of the first resource in the first resource pool.

[0144] Optionally, the network device may allocate a first resource to the first terminal device based on one or more information to reduce collisions for HD FDD resources. For example, the position of the first resource in the first resource pool may be determined based on one or more of the following information: service levels of the plurality of terminal devices; resources required by the first terminal device; signal strength and / or reference path loss corresponding to the first terminal device; and the number of negative acknowledgements (NACKs) received by the first terminal device.

[0145] As an example, the service levels of multiple terminal devices can be determined based on the service levels of the terminal device services. Optionally, the service level of the first terminal device can be determined based on the services of multiple terminal devices including the first terminal device. For example, the higher the service level of the first terminal device service, the smaller the index (index) in the first resource pool corresponding to the allocated first resource. In other words, the higher the level of the first terminal device, the closer the first resource is to the starting point 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.

[0146] As an example, the service levels of the plurality of terminal devices may include service priorities. The priorities of different services may be set based on different levels of quality of service (QoS).

[0147] As an example, the first resource may be determined based on the resource required by the first terminal device. Optionally, the size of the first resource is greater than or equal to the size of the resource required by the first terminal device.

[0148] As an example, the first resource may be determined based on the signal strength and / or reference path loss corresponding to the first terminal device. The signal strength may be determined based on various parameters such as reference signal received power (RSRP). The reference path loss may be an estimated path loss at the location of the first terminal device. In other words, the reference path loss may be determined based on the location of the terminal device.

[0149] As an example, the first resource may be determined based on feedback information received by the first terminal device. Optionally, when the first terminal device transmits based on a hybrid automatic repeat request (HARQ), the number of NACKs received by the first terminal device may be used to determine the first resource.

[0150] For example, the feedback information of the uplink transmission received by the first terminal device may include NACK. When the number of NACKs received by the first terminal device reaches a first threshold, the first terminal device sends a first request. The first threshold is, for example, 3 or 5 times.

[0151] For example, when the number of NACKs received by the first terminal device from the base station's HARQ feedback reaches a first threshold, the first terminal device may determine that the PUSCH transmission may collide with downlink reception or uplink transmission from other terminal devices. In this scenario, the first terminal device sends an SR to the NTN. The SR may also include information such as the number of NACKs received, service level, and required resources.

[0152] For ease of understanding, the method for a network device to send the first indication information based on the first request is exemplarily described below in conjunction with a possible implementation shown in Figure 6. For the sake of brevity, the terms already explained in Figure 5 will not be repeated.

[0153] 6 , in step S610 , the first terminal device sends capability information of supporting half-duplex to the network device.

[0154] In step S620 , the network device configures a dedicated first resource pool for half-duplex according to capability information of one or more terminal devices.

[0155] In step S630, the first terminal device sends a first request to the network device within a first time period.

[0156] 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.

[0157] 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.

[0158] Optionally, the first resource can also be determined based on 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 to the first terminal device. As an example, after the NTN network receives the SR sent by the first terminal device, it can determine whether there are suitable resources based on the resource allocation in the first resource pool. If there are suitable resources in the first resource pool, the network device can allocate or reallocate the required resource size for the first terminal device; if not, the network device needs to dynamically allocate resources for the first terminal device through PDCCH DCI.

[0159] 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. In other words, when the remaining resources in the first resource pool do not meet the needs of the first terminal device, the network device may send information about dynamically allocated resources via the first indication information.

[0160] Optionally, the time domain position of the first resource may also be determined according to the time domain position related to the first indication information. An exemplary description will be given below in conjunction with a calculation formula for the first resource.

[0161] In some embodiments, in a downlink reception scenario, the first resource may also include a transmission window for various information sent by the network device, so that the first terminal device can read the various information sent by the network device in a timely manner.

[0162] As an example, the various information sent by the network device includes multiple SIBs. The first SIB may be any one or more SIBs among the multiple SIBs. For example, the first SIB is SIB19 mentioned above.

[0163] 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 receives the first SIB in a timely manner. Exemplarily, the network device may send the first SIB within the one or more transmission windows respectively, and the first terminal device may preferentially receive the first SIB within any transmission window of the one or more transmission windows.

[0164] As an example, when the first terminal device also needs to perform uplink transmission or receive downlink channels (PDCCH and / or PDSCH) within any transmission window, the first terminal device can preferentially receive or read the first SIB.

[0165] As an example, when the second time period includes multiple transmission windows, the multiple transmission windows may have a certain interval.

[0166] As an example, the second time period may be a system information (SI) window. The system periodically transmits SIB19 within the associated SI window. The duration and start time of the SI window are known to the first terminal device. Therefore, the network device can reconfigure the SI window for reading SIB19 so that the first terminal device can update the ephemeris information in a timely manner.

[0167] As an example, the second time period may be a periodically configured time period, for example, the second time period is 1024 subframes.

[0168] As an example, the first indication information may indicate configuration information for the one or more transmission windows. For example, to ensure that the first terminal device reads SIB19, a window subset dedicated to half-duplex devices, namely, a SIB19 SI window subset, is configured within the second time period. For example, the network device may configure a dedicated SI window for all terminal devices supporting HD FDD.

[0169] As an example, during these subsets of the SI window, the first terminal device may prioritize reading SIB19.

[0170] As an example, the configuration information of the window subset supporting HD FDD may be indicated through SIB information or higher layer signaling.

[0171] For example, two SI windows are configured every 1024 subframes. In response, the terminal device supporting HD-FDD may attempt to read SIB19 during either of the two SI windows. For ease of understanding, the implementation method of FIG7 is used for exemplary description below.

[0172] As shown in Figure 7, there are seven SIB19 transmission windows in the second time period, namely windows 701 to 707. Of these, windows 702 and 706 are reserved SIB19 transmission windows supporting half-duplex, while the other windows are regular SIB19 transmission windows. That is, windows 702 and 706 represent two SIB windows configured for HD FDD terminal devices, while the other windows represent SIB windows configured for FD FDD terminal devices. After the first terminal device enables half-duplex mode, it preferentially receives SIB19 in windows 702 and 706.

[0173] The above, in conjunction with Figures 5 to 7, details a method for a first terminal device to determine a first resource based on first indication information. This method allows multiple terminal devices to perform uplink transmissions or read SIB19 on half-duplex-dedicated resources, thereby avoiding conflicts between uplink and downlink transmissions and the inability to update ephemeris information in a timely manner due to periodic uplink transmissions. Furthermore, within the first resource pool, network devices can allocate resources to multiple terminal devices based on various information, such as service level, thereby avoiding transmission conflicts between multiple terminal devices.

[0174] As can be seen from the foregoing, the time domain position of the first resource can 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 can include the time domain position of multiple information carrying the first indication information.

[0175] In some embodiments, the first resource may be determined based on a time domain location associated with the first indication information and a second offset value. The second offset value may be determined based on a time length used for the offset and a time length required for the first terminal device to transmit. The time length used for the offset may be, for example, a time length of a resource used for half-duplex communication. The time length required for the first terminal device to transmit includes a time length of resources required for a service of the first terminal device.

[0176] Optionally, the second offset value is determined by an identity (ID) of the first terminal device and / or an ID of a terminal device group that the first terminal device is in. For example, the first resource may be associated with an ID related to the first terminal device to avoid conflicts between different terminal devices.

[0177] Exemplarily, when the network device performs dynamic resource allocation through the PDCCH, the time domain position related to the first indication information may be the time domain position of the PDCCH that carries the first indication information.

[0178] Exemplarily, the ID of the first terminal device may be an international mobile station equipment identity (IMEI) or a temporary IMEI (T-IMEI), which is not limited here.

[0179] 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 may be:

[0180] 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 offsetIndicates 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 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.

[0181] For example, 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] For example, K offset is the scheduling time offset mentioned above, which can be set by the network device. In some examples, K offset It can be cell-specific, first terminal device-specific, or beam-specific. For example, the network device can configure a corresponding K for each beam from the same satellite and / or the same non-terrestrial cell. offset Value. K offset The value of 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 based at least in part on the distance of the feeder link between the base station or gateway and the satellite and the maximum possible distance from the terminal device. offset value.

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

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

[0186] From the above formula, we can see that the second offset value is For each UE ID , the relative position of the dedicated resource offset of the terminal device corresponding to this ID is different from that of the terminal device corresponding to other IDs. If the N time slots relative to the PDCCH time domain position in the uplink resource are all PUSCH selectable, for different UE ID The positions of the offsets are all different.

[0187] Optionally, when multiple terminal devices in 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 to which the first terminal device belongs.

[0188] As an example, if the system supports orthogonal cover code (OCC), the transmission data of multiple users can be multiplexed on one RB and distinguished by the OCC orthogonal code. In this scenario, multiple users can be grouped to determine the ID of a terminal device group that multiplexes the same RB. ID ). If the entire N time slots relative to the PDCCH time domain position in the uplink resource belong to PUSCH, the PUSCH can be selected for different Group ID The position of the offset is different.

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

[0190] Among them, Group ID Indicates the ID of the terminal device group to which the first terminal device belongs. The second offset value is

[0191] Optionally, the second offset value may also be determined based on the priority of the first terminal device or the priority of the terminal device group to which the first terminal device belongs. A priority level needs to be set for each terminal device or terminal device group. The higher the priority of the first terminal device or the terminal device group to which it belongs, the closer the first resource can be to the starting point of the available resources, i.e., the smaller the index.

[0192] As an example, when the second offset value is also related to the priority, the time domain position of the first resource may be:

[0193] Among them, γ i Indicates the priority of the terminal device set where the first terminal device is located. The second offset value is

[0194] Optionally, γ i The smaller the value, the higher the priority of the terminal device group to which the first terminal device belongs.

[0195] As previously mentioned, in the NTN system, the misalignment between the base station and terminal devices is related to the reporting granularity of the MAC CE carrying the TA report. In other words, the granularity of the TA report cannot meet the large transmission latency in the NTN system. To ensure more accurate TA for HD FDD terminal devices, the TA settings in the NTN can be enhanced. The HD FDD terminal device can be the first terminal device.

[0196] In some embodiments, the network can set the granularity of TA reporting to support symbol duration, that is, microseconds (μs). By adjusting the time granularity of TA reporting, the network device can promptly learn the TA adjustment amount of the terminal device to reduce TA misalignment.

[0197] In some embodiments, the network may set the TA in [TA min ,TA max ], where TA min and TA max They are the minimum and maximum TA of the cell respectively. min ,TA max ], the network device can know the minimum and maximum TA of the cell, and potential TA misalignment can be resolved through scheduling by the network device. The network device can use the TA to determine the retention duration of the SSB, as shown in Figure 8. The following is an exemplary description of this method with reference to Figure 8.

[0198] 8 , for a terminal device with a given TA, multiple downlink time units 810, such as 4 DL symbols, may be determined based on the TA parameter. TX-RX N is the SSB duration corresponding to the terminal device performing the switch from sending to receiving. RX-TX It is the SSB duration corresponding to the switching between receiving and transmitting of the terminal device. It should be understood that the SSB during the switching time between transmitting and receiving or transmitting and receiving can be considered as an invalid resource for PUSCH transmission. C Indicates the minimum sampling time period in the system.

[0199] As shown in FIG8 , for TA in the TA range ([TA min ,TA max ]) for all terminal devices within SSB start -N TX-RX T C +TA min to SSB end +N RX-TX T C +TA max The duration of SSB is the retention duration of SSB. All UL symbols outside the retention duration will not conflict with the reception of SSB. The 6 UL symbols that overlap with the retention duration are invalid resources. start and SSB end are the start and end times of UL symbols with the same SSB start and end symbol indexes, respectively.

[0200] For example, when performing PUSCH repetition and resource allocation for HD FDD terminal equipment in NR NTN, the TA range can be used to determine the SSB start -N TX-RX T C +TA min to SSB end +N RX-TX T C +TA max duration, thereby determining that the UL symbols overlapping with the duration are invalid resources, so as to avoid conflicts between the uplink transmission and downlink transmission of the terminal device.

[0201] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 8. The device embodiment of the present application is described in detail below in conjunction with Figures 9 to 11. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for portions not described in detail, reference can be made to the above method embodiment.

[0202] FIG9 is a schematic block diagram of a terminal device according to an embodiment of the present application. The terminal device 900 may be any of the first terminal devices described above. The terminal device 900 shown in FIG9 includes a determining unit 910.

[0203] The determining unit 910 may be configured to determine a first resource related to half-duplex communication according to the first indication information; wherein the first resource is used for uplink transmission and / or downlink reception by the first terminal device in the NTN.

[0204] Optionally, the first resource includes one or more ROs, the one or more 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 one or more ROs.

[0205] Optionally, the first indication information includes a first identifier, one or more ROs carry the first identifier, and the first identifier is used to indicate that the one or more ROs are used for half-duplex communication.

[0206] 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.

[0207] Optionally, the first resource includes multiple ROs among one or more ROs, and at least two ROs among the multiple ROs correspond to different SSBs respectively.

[0208] Optionally, the at least two ROs include a first RO with an earlier time domain position and a second RO with a later time domain position, and the time domain position RO' of the second RO is:

[0209] RO′=RO+2 μ ×K cell,offset ;

[0210] Among them, 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.

[0211] Optionally, one or more ROs correspond to any SSB in the first SSB group supporting half-duplex communication, and the first indication information is used to indicate the first SSB group. The terminal device 900 also includes a first sending unit, which can be used to send capability information of supporting half-duplex communication to the 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 also used to select one or more SSBs corresponding to the RO in the first SSB group according to the first indication information.

[0212] Optionally, the first resource is a time-frequency resource in a first resource pool, and the first resource pool is used to support uplink transmission of multiple terminal devices in half-duplex mode, and the multiple terminal devices include the first terminal device.

[0213] Optionally, the position of the first resource in the first resource pool is determined based on one or more of the following information: service levels of multiple terminal devices; resources required by the first terminal device; signal strength and / or reference path loss corresponding to the first terminal device; and the number of NACKs received by the first terminal device.

[0214] Optionally, the terminal device 900 further includes a second sending unit, which can be used to send 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 the network device.

[0215] Optionally, the terminal device 900 further includes a first receiving unit, which can be used to receive feedback information of uplink transmission, where the feedback information includes NACK; the second sending unit is further used to send a first request when the number of NACKs received by the first terminal device reaches a first threshold.

[0216] 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.

[0217] Optionally, the first resource includes one or more transmission windows of the first SIB within the second time period, and the terminal device 900 also includes a second receiving unit, which can be used to preferentially receive the first SIB in any transmission window of the one or more transmission windows.

[0218] Optionally, the first indication information is used to indicate configuration information of one or more transmission windows, and the first SIB is SIB19.

[0219] Optionally, the first indication information is carried in one or more of the following information: SIB, RRC and PDCCH.

[0220] Optionally, the first resource is determined based on a time domain position and a second offset value associated with the first indication information, and the second offset value is determined by the ID of the first terminal device and / or the ID of the terminal device set to which the first terminal device is located.

[0221] Optionally, the time domain position of the first resource is:

[0222] 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 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.

[0223] Optionally, 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 the ID of the terminal device group.

[0224] Optionally, the second offset value is further determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

[0225] Optionally, the time domain position of the first resource is:

[0226] 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 Indicates the priority of the terminal device group to which the first terminal device belongs. Group ID represents the ID of the terminal device group to which the first terminal device belongs, 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.

[0227] FIG10 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. The network device 1000 shown in FIG10 includes a sending unit 1010.

[0228] The sending unit 1010 may be used to send first indication information to the first terminal device; wherein the first indication information is used by the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used by the first terminal device to perform uplink transmission and / or downlink reception in the NTN.

[0229] Optionally, the first resource includes one or more ROs, the one or more 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 one or more ROs.

[0230] Optionally, the first indication information includes a first identifier, one or more ROs carry the first identifier, and the first identifier is used to indicate that the one or more ROs are used for half-duplex communication.

[0231] 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.

[0232] Optionally, the first resource includes multiple ROs among one or more ROs, and at least two ROs among the multiple ROs correspond to different SSBs respectively.

[0233] Optionally, the at least two ROs include a first RO with an earlier time domain position and a second RO with a later time domain position, and the time domain position RO′ of the second RO is:

[0234] RO′=RO+2 μ ×K cell,offset ;

[0235] Among them, 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.

[0236] Optionally, one or more ROs correspond to any SSB in the first SSB group supporting half-duplex communication, and the first indication information is used to indicate the first SSB group. The network device 1000 also includes a first receiving unit, which can be used to receive capability information of supporting half-duplex communication sent by the first terminal device. The capability information is used to trigger the network device to group multiple SSBs to determine the first indication information. The first indication information is used by the first terminal device to select SSBs corresponding to one or more ROs in the first SSB group.

[0237] Optionally, the first resource is a time-frequency resource in a first resource pool, and the first resource pool is used to support uplink transmission of multiple terminal devices in half-duplex mode, and the multiple terminal devices include the first terminal device.

[0238] Optionally, the position of the first resource in the first resource pool is determined based on one or more of the following information: service levels of multiple terminal devices; resources required by the first terminal device; signal strength and / or reference path loss corresponding to the first terminal device; and the number of NACKs received by the first terminal device.

[0239] Optionally, the network device 1000 further includes a second receiving unit, which can be used to receive a first request sent by a 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.

[0240] Optionally, the sending unit 1010 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 used to receive the first request when the number of NACKs received by the first terminal device reaches a first threshold.

[0241] 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.

[0242] Optionally, the first resource includes one or more transmission windows of the first SIB within the second time period, and the sending unit 1010 is further configured to send the first SIB within the one or more transmission windows respectively.

[0243] Optionally, the first indication information is used to indicate configuration information of one or more transmission windows, and the first SIB is SIB19.

[0244] Optionally, the first indication information is carried in one or more of the following information: SIB, RRC and PDCCH.

[0245] Optionally, the first resource is determined based on a time domain position and a second offset value associated with the first indication information, and the second offset value is determined by the ID of the first terminal device and / or the ID of the terminal device set to which the first terminal device is located.

[0246] Optionally, the time domain position of the first resource is:

[0247] 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 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.

[0248] Optionally, 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 the ID of the terminal device group.

[0249] Optionally, the second offset value is further determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

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

[0251] 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 Indicates the priority of the terminal device group to which the first terminal device belongs. Group ID represents the ID of the terminal device group to which the first terminal device belongs, 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.

[0252] FIG11 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. The dashed lines in FIG11 indicate that the unit or module is optional. Apparatus 1100 may be used to implement the method described in the above method embodiment. Apparatus 1100 may be a chip, a terminal device, or a network device.

[0253] The device 1100 may include one or more processors 1110. The processor 1110 may support the device 1100 to implement the method described in the method embodiment above. The processor 1110 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0254] The apparatus 1100 may further include one or more memories 1120. The memories 1120 store programs that can be executed by the processor 1110, causing the processor 1110 to perform the methods described in the above method embodiments. The memories 1120 may be independent of the processor 1110 or integrated into the processor 1110.

[0255] The apparatus 1100 may further include a transceiver 1130. The processor 1110 may communicate with other devices or chips via the transceiver 1130. For example, the processor 1110 may transmit and receive data with other devices or chips via the transceiver 1130.

[0256] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0257] The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, or a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state drive (SSD)).

[0258] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal device or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0259] 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 process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. 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 one website, computer, server or data center to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0260] The present application also provides a computer program that can be applied to a terminal device or network device provided in the present application, and enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0261] The terms "system" and "network" in this application may be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first," "second," "third," and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

[0262] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0263] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0264] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to a definition in a protocol.

[0265] In the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0266] In the embodiments of the present 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.

[0267] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0268] In the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0269] In the several embodiments provided in 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 schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0270] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0271] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0272] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

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; The first resource is used by the first terminal device for uplink transmission and / or downlink reception in the non-terrestrial network NTN.

2. The method according to claim 1, characterized in that The first resource includes one or more random access channel opportunities RO, the one or more ROs are used by the first terminal device to perform random access in half-duplex mode, and the first indication information is used by the first terminal device to determine the one or more ROs.

3. The method according to claim 2, characterized in that The first indication information includes a first identifier, and the one or more ROs carry the first identifier, and the first identifier is used to indicate that the one or more 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 one or more ROs, the first RO group is an RO group for half-duplex communication among multiple RO groups, and the multiple RO groups correspond to a first synchronization signal block SSB.

5. The method according to claim 2, characterized in that The first resource includes multiple ROs among the one or more ROs, and at least two ROs among the multiple ROs correspond to different SSBs respectively.

6. The method according to claim 5, 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.

7. The method according to claim 2, characterized in that The one or more ROs correspond to any SSB in 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 the SSB corresponding to the one or more ROs in the first SSB group according to the first indication information.

8. The method according to any one of claims 1 to 7, characterized in that The first resource is a time-frequency resource in a first resource pool, and 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.

9. The method according to claim 8, 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: 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 acknowledgments (NACKs) received by the first terminal device.

10. The method according to claim 8 or 9, 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 about the first resource pool and allocation information of the first resource from a network device.

11. The method according to claim 10, characterized in that The method further comprises: The first terminal device receives feedback information of the 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.

12. The method according to any one of claims 8 to 11, characterized in that 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.

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

14. The method according to claim 13, 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.

15. The method according to any one of claims 1 to 14, 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.

16. The method according to any one of claims 1 to 15, 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 the identification ID of the first terminal device and / or the terminal device set ID to which the first terminal device belongs.

17. The method according to claim 16, characterized in that The time domain location 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 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.

18. The method according to claim 16, 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 the ID of the terminal device group.

19. The method according to any one of claims 16 to 18, characterized in that The second offset value is further determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

20. The method according to claim 19, wherein The time domain location 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 Indicates the priority of the terminal device group to which the first terminal device belongs. ID represents the ID of the terminal device group to which the first terminal device belongs, 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.

21. A method for wireless communication, characterized in that: include: The network device sends first indication information to the first terminal device; The first indication information is used by the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used by the first terminal device to perform uplink transmission and / or downlink reception in a non-terrestrial network NTN.

22. The method according to claim 21, characterized in that The first resource includes one or more random access channel opportunities RO, the one or more ROs are used by the first terminal device to perform random access in half-duplex mode, and the first indication information is used by the first terminal device to determine the one or more ROs.

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

24. The method according to claim 22, characterized in that The first indication information is used to indicate a first RO group, the first RO group includes the one or more ROs, the first RO group is an RO group for half-duplex communication among multiple RO groups, and the multiple RO groups correspond to a first synchronization signal block SSB.

25. The method according to claim 22, wherein The first resource includes multiple ROs among the one or more ROs, and at least two ROs among the multiple ROs correspond to different SSBs respectively.

26. The method according to claim 25, 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.

27. The method according to claim 22, wherein The one or more ROs correspond to any SSB in 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 the SSB corresponding to the one or more ROs in the first SSB group.

28. The method according to any one of claims 21 to 27, characterized in that The first resource is a time-frequency resource in a first resource pool, and 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.

29. The method according to claim 28, 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: 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 acknowledgments (NACKs) received by the first terminal device.

30. The method according to claim 28 or 29, 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.

31. The method according to claim 30, wherein 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.

32. The method according to any one of claims 28 to 31, characterized in that 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.

33. The method according to any one of claims 21 to 32, characterized in that The first resource includes one or more transmission windows of a first system information block (SIB) within a second time period. The method further includes: The network device sends the first SIB within the one or more transmission windows respectively.

34. The method according to claim 33, wherein The first indication information is used to indicate configuration information of the one or more transmission windows, and the first SIB is SIB19.

35. The method according to any one of claims 21 to 34, 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.

36. The method according to any one of claims 21 to 35, 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 the identification ID of the first terminal device and / or the terminal device set ID to which the first terminal device belongs.

37. The method according to claim 36, wherein The time domain location 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 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.

38. The method according to claim 36, 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 the ID of the terminal device group.

39. The method according to any one of claims 36 to 38, wherein: The second offset value is further determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

40. The method according to claim 39, wherein The time domain location 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 Indicates the priority of the terminal device group to which the first terminal device belongs. ID represents the ID of the terminal device group to which the first terminal device belongs, 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.

41. 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; The first resource is used by the first terminal device for uplink transmission and / or downlink reception in the non-terrestrial network NTN.

42. The terminal device according to claim 41, characterized in that The first resource includes one or more random access channel opportunities RO, the one or more ROs are used by the first terminal device to perform random access in half-duplex mode, and the first indication information is used by the first terminal device to determine the one or more ROs.

43. The terminal device according to claim 42, characterized in that The first indication information includes a first identifier, and the one or more ROs carry the first identifier, and the first identifier is used to indicate that the one or more ROs are used for half-duplex communication.

44. The terminal device according to claim 42, characterized in that The first indication information is used to indicate a first RO group, the first RO group includes the one or more ROs, the first RO group is an RO group for half-duplex communication among multiple RO groups, and the multiple RO groups correspond to a first synchronization signal block SSB.

45. The terminal device according to claim 42, characterized in that The first resource includes multiple ROs among the one or more ROs, and at least two ROs among the multiple ROs correspond to different SSBs respectively.

46. ​​The terminal device according to claim 45, 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.

47. The terminal device according to claim 42, characterized in that The one or more ROs correspond to any SSB in 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 configured to select the SSBs corresponding to the one or more ROs in the first SSB group according to the first indication information.

48. The terminal device according to any one of claims 41 to 47, characterized in that: The first resource is a time-frequency resource in a first resource pool, and 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.

49. The terminal device according to claim 48, 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: 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 acknowledgments (NACKs) received by the first terminal device.

50. The terminal device according to claim 48 or 49, characterized in that The terminal device further includes: The second sending unit is configured to send a first request within a first time period, where the first request is used to request information about the first resource pool and allocation information of the first resource from the network device.

51. The terminal device according to claim 50, 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.

52. The terminal device according to any one of claims 48 to 51, characterized in that: 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.

53. The terminal device according to any one of claims 41 to 52, characterized in that: The first resource includes one or more transmission windows of a first system information block SIB within a second time period, and the terminal device further includes: The second receiving unit is configured to preferentially receive the first SIB in any transmission window of the one or more transmission windows.

54. The terminal device according to claim 53, 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.

55. The terminal device according to any one of claims 41 to 54, 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.

56. The terminal device according to any one of claims 41 to 55, 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 the identification ID of the first terminal device and / or the terminal device set ID to which the first terminal device belongs.

57. The terminal device according to claim 56, characterized in that The time domain location 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 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.

58. The terminal device according to claim 56, 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 the ID of the terminal device group.

59. The terminal device according to any one of claims 56 to 58, characterized in that: The second offset value is further determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

60. The terminal device according to claim 59, characterized in that The time domain location 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 Indicates the priority of the terminal device group to which the first terminal device belongs. ID represents the ID of the terminal device group to which the first terminal device belongs, 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.

61. A network device, characterized in that include: A sending unit, configured to send first indication information to a first terminal device; The first indication information is used by the first terminal device to determine a first resource related to half-duplex communication, and the first resource is used by the first terminal device to perform uplink transmission and / or downlink reception in a non-terrestrial network NTN.

62. The network device according to claim 61, wherein: The first resource includes one or more random access channel opportunities RO, the one or more ROs are used by the first terminal device to perform random access in half-duplex mode, and the first indication information is used by the first terminal device to determine the one or more ROs.

63. The network device according to claim 62, characterized in that The first indication information includes a first identifier, and the one or more ROs carry the first identifier, and the first identifier is used to indicate that the one or more ROs are used for half-duplex communication.

64. The network device according to claim 62, wherein: The first indication information is used to indicate a first RO group, the first RO group includes the 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 synchronization signal block SSB.

65. The network device according to claim 62, characterized in that The first resource includes multiple ROs among the one or more ROs, and at least two ROs among the multiple ROs correspond to different SSBs respectively.

66. The network device according to claim 65, 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.

67. The network device according to claim 62, characterized in that The one or more ROs correspond to any SSB in 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: The first receiving unit is used to receive capability information of supporting half-duplex communication sent by the first terminal device, where 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 the SSBs corresponding to the one or more ROs in the first SSB group.

68. The network device according to any one of claims 61 to 67, characterized in that: The first resource is a time-frequency resource in a first resource pool, and 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.

69. The network device according to claim 68, 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: 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 acknowledgments (NACKs) received by the first terminal device.

70. The network device according to claim 68 or 69, characterized in that The network device further 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 about the first resource pool and allocation information of the first resource from a network device.

71. The network device according to claim 70, wherein: The sending unit is further configured to send feedback information of the 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.

72. The network device according to any one of claims 68 to 71, characterized in that: 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.

73. The network device according to any one of claims 61-72, characterized in that The first resource includes one or more transmission windows of a first system information block SIB within a second time period, and the sending unit is further configured to send the first SIB within the one or more transmission windows respectively.

74. The network device according to claim 73, 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.

75. The network device according to any one of claims 61 to 74, 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.

76. The network device according to any one of claims 61 to 75, 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 the identification ID of the first terminal device and / or the terminal device set ID to which the first terminal device belongs.

77. The network device according to claim 76, characterized in that The time domain location 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 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.

78. The network device according to claim 76, 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 the ID of the terminal device group.

79. The network device according to any one of claims 76 to 78, characterized in that The second offset value is further determined according to the priority of the first terminal device or the terminal device group to which the first terminal device belongs.

80. The network device according to claim 79, wherein: The time domain location 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 distance between the PDCCH and the corresponding uplink channel The time offset between offset represents the time offset to compensate for NTN transmission delay, γ i Indicates the priority of the terminal device group to which the first terminal device belongs. ID represents the ID of the terminal device group to which the first terminal device belongs, 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.

81. A communication device, characterized in that The system 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 according to any one of claims 1 to 40.

82. A device, characterized in that The device comprises a processor configured to call a program from a memory to execute the method according to any one of claims 1 to 40.

83. A chip, characterized in that The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 40.

84. 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 40.

85. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 40.

86. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 40.

Images