Wireless communication method, terminal device and network device

Abstract

Embodiments of the present invention provide a wireless communication method, a terminal device, and a network device. When a network device indicates the position of a transmitted / non-transmitted SSB, it can indicate the frequency-domain position of the SSB and / or the coverage cell corresponding to the SSB through indication information, so as to be used for the terminal device to complete initial access and match the data rate of downlink reception. Embodiments of the present invention may include: The terminal device receives first indication information sent by the network device, where the first indication information is used to indicate the frequency-domain position of a synchronization signal block SSB and / or the coverage cell corresponding to the SSB.

Description

Technical Field

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

[0002] In a Non Terrestrial Network (NTN) system, when a network device (such as a satellite) serves multiple ground coverage cells (footprints) through multiple beams, these multiple footprints may correspond to the same cell Identity (ID). Additionally, in the case where the frequency reuse factor is greater than 1, different footprints may correspond to different frequency resources. In these scenarios, the existing initial access mechanism needs to be enhanced. Summary of the Invention

[0003] Embodiments of the present invention provide a wireless communication method, a terminal device, and a network device. When a network device indicates the position of a transmitted / non-transmitted Synchronization Signal Block (SSB), it can indicate the frequency domain position of the SSB and / or the coverage cell corresponding to the SSB, so as to enable a terminal device to complete initial access and match the data rate of downlink reception.

[0004] In a first aspect of the embodiments of the present invention, a wireless communication method is provided, which may include: a terminal device receives first indication information sent by a network device, where the first indication information is used to indicate the frequency domain position of a Synchronization Signal Block (SSB) and / or the coverage cell corresponding to the SSB.

[0005] In a second aspect of the embodiments of the present invention, a wireless communication method is provided, which may include: a network device sends first indication information to a terminal device, where the first indication information is used to indicate the frequency domain position of a Synchronization Signal Block (SSB) and / or the coverage cell corresponding to the SSB.

[0006] In yet another aspect of the embodiments of the present invention, a terminal device is provided, which has the function of indicating to complete the data rate matching of initial access and downlink reception. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0007] In yet another aspect of the embodiments of the present invention, a network device is provided, which has the function of indicating to complete the data rate matching of initial access and downlink reception. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0008] Another aspect of the embodiments of the present invention provides a terminal device, including: a memory storing executable program code; a transceiver coupled to the memory; the transceiver is configured to execute the method described in the first aspect of the embodiments of the present invention.

[0009] Another aspect of the embodiments of the present invention provides a terminal device, including: a memory storing executable program code; a transceiver coupled to the memory; the transceiver is configured to execute the method described in the second aspect of the embodiments of the present invention.

[0010] Another aspect of the embodiments of the present invention provides a computer-readable storage medium, including instructions that, when run on a computer, cause the computer to execute the method described in the first aspect or the second aspect of the present invention.

[0011] Another aspect of the embodiments of the present invention provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the method described in the first aspect or the second aspect of the present invention.

[0012] Another aspect of the embodiments of the present invention provides a chip, the chip is coupled to the memory in the terminal device, so that when the chip runs, it calls the program instructions stored in the memory, so that the terminal device executes the method described in the first aspect of the present invention.

[0013] Another aspect of the embodiments of the present invention provides a chip, the chip is coupled to the memory in the network device, so that when the chip runs, it calls the program instructions stored in the memory, so that the network device executes the method described in the second aspect of the present invention.

[0014] In the technical solution provided by the embodiments of the present invention, the terminal device receives first indication information sent by the network device, where the first indication information is used to indicate the frequency-domain position of the synchronization signal block SSB and / or the covered cell corresponding to the SSB. The terminal device can complete initial access and downlink reception data rate matching according to the first indication information. Through the method of the embodiments of the present application, terminal devices in different covered cells on the ground can correctly complete the initial access and downlink data reception rate matching of the NTN system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A A schematic diagram of partial SSB patterns for FR1 in different situations in the NR system;

[0016] Figure 1B A schematic diagram of partial SSB patterns for FR2 in different situations in the NR system;

[0017] Figure 1CSchematic diagram of a group of SSBs with the SSB pattern in Case A within one half-frame;

[0018] Figure 2A Schematic diagram of the NTN scenario applied in the embodiment of the present invention;

[0019] Figure 2B Schematic diagram of a frequency reuse factor of 1 in the NTN scenario;

[0020] Figure 2C Schematic diagram of a frequency reuse factor of 3 in the NTN scenario;

[0021] Figure 2D Schematic diagram of a frequency reuse factor of 2 in the NTN scenario;

[0022] Figure 3A System architecture diagram of the communication system applied in the embodiment of the present invention;

[0023] Figure 3B System architecture diagram of the communication system applied in the embodiment of the present invention;

[0024] Figure 3C System architecture diagram of the communication system applied in the embodiment of the present invention;

[0025] Figure 4A Example diagram of the beam-based NTN network deployment scenario in the embodiment of the present invention;

[0026] Figure 4B Example diagram of the method for the network device to perform SSB transmission in the embodiment of the present invention;

[0027] Figure 4C Example diagram of the method for the network device to perform SSB transmission in the embodiment of the present invention;

[0028] Figure 4D Example diagram of the method for the network device to perform SSB transmission in the embodiment of the present invention;

[0029] Figure 4E Example diagram of the method for the network device to perform SSB transmission in the embodiment of the present invention;

[0030] Figure 5 Schematic diagram of an embodiment of the method for transmitting the synchronization signal block SSB in the embodiment of the present application;

[0031] Figure 6A Schematic diagram of a terminal device in the embodiment of the present application;

[0032] Figure 6B Another schematic diagram of a terminal device in the embodiment of the present application;

[0033] Figure 7 A schematic diagram of a network device in an embodiment of the present application;

[0034] Figure 8 Another schematic diagram of a terminal device in an embodiment of the present application;

[0035] Figure 9 Another schematic diagram of a network device in an embodiment of the present application. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0037] First, a brief description will be given to some terms involved in the present application as follows:

[0038] The research on the next-generation (new radio communication system) (New radio, NR) system mainly considers two frequency bands currently, frequency band FR1 (Frequency range 1) and frequency band FR2 (Frequency range 2). Among them, the frequency domain ranges included in FR1 and FR2 are shown in Table 1. It should be understood that the embodiments of the present application can be applied to the FR1 and FR2 frequency bands, and can also be applied to other frequency bands, such as the frequency band from 52.6 GHz to 71 GHz, or the frequency band from 71 GHz to 100 GHz, etc. The present application is not limited thereto.

[0039] Frequency Band Definition Corresponding Frequency Band Range FR1 410 MHz – 7.125 GHz FR2 24.25 GHz – 52.6 GHz

[0040] Table 1

[0041] The research of the NR system includes Non Terrestrial Network (NTN) technology. NTN generally uses satellite communication to provide communication services to ground users. Compared with terrestrial cellular network communication, satellite communication has many unique advantages. First, satellite communication is not restricted by the user's location. For example, general terrestrial communication cannot cover areas such as the ocean, high mountains, and deserts where communication equipment cannot be installed or where communication coverage is not provided due to sparse population. For satellite communication, since a single satellite can cover a large area of the ground and the satellite can orbit the Earth, in theory, every corner of the Earth can be covered by satellite communication. Second, satellite communication has great social value. Satellite communication can cover remote mountainous areas, poor and backward countries or regions at a relatively low cost, enabling people in these areas to enjoy advanced voice communication and mobile Internet technologies, which is conducive to narrowing the digital divide with developed regions and promoting the development of these regions. Third, satellite communication has a long communication distance, and the communication cost does not increase significantly as the communication distance increases; finally, satellite communication has high stability and is not restricted by natural disasters.

[0042] Communication satellites are divided into LEO (Low-Earth Orbit) satellites, MEO (Medium-Earth Orbit) satellites, GEO (Geostationary Earth Orbit) satellites, HEO (High Elliptical Orbit) satellites, etc. according to different orbital heights. At the current stage, the main research focuses on LEO and GEO.

[0043] For LEO satellites, the orbital height range is 500 km to 1500 km, and the corresponding orbital period is about 1.5 hours to 2 hours. The signal propagation delay of single-hop communication between terminals is generally less than 20 ms. The maximum satellite visibility time is 20 minutes. The signal propagation distance is short, the link loss is small, and the requirement for the terminal's transmission power is not high.

[0044] For GEO satellites, the orbital height is 35786 km, and the rotation period around the Earth is 24 hours. The signal propagation delay of single-hop communication between users is generally 250 ms.

[0045] To ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multi-beam to cover the ground. A single satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover a ground area with a diameter of dozens to hundreds of kilometers.

[0046] Initial access in the NR system is completed through Synchronizing Signal / PBCH Block (SSB or SS / PBCH block). The SSB includes the Primary synchronization signal (PSS), the Secondary synchronization signal (SSS), and the Physical Broadcast Channel (PBCH).

[0047] In the NR system, the SSB patterns supported by FR1 include three cases (Case A, Case B, Case C), and the SSB patterns supported by FR2 include two cases (Case D, Case E). Among them, one SSB transmission opportunity can include one or more SSBs. One SSB includes 4 symbols in the time domain, and a set of SSB transmission opportunities should be completed within one half-frame (5 ms). Assuming that the index of the first symbol in the first time slot within one half-frame is symbol 0:

[0048] (1) Case A - 15 kHz subcarrier spacing:

[0049] 1) The index of the first symbol of the SSB includes {2, 8} + 14 * n;

[0050] 2) For non-shared spectrum:

[0051] ① When the carrier frequency is less than or equal to 3 GHz, n = 0, 1;

[0052] ② When the carrier frequency within FR1 is greater than 3 GHz, n = 0, 1, 2, 3;

[0053] 3) For shared spectrum, n = 0, 1, 2, 3, 4.

[0054] (2) Case B - 30 kHz subcarrier spacing:

[0055] 1) The index of the first symbol of the SSB includes {4, 8, 16, 20} + 28 * n;

[0056] ① When the carrier frequency is less than or equal to 3 GHz, n = 0;

[0057] ② When the carrier frequency within FR1 is greater than 3 GHz, n = 0, 1.

[0058] (3) Case C - 30 kHz subcarrier spacing:

[0059] 1) The index of the first symbol of the SSB includes {2, 8} + 14 * n;

[0060] 2) For non-shared spectrum and belonging to paired spectrum (e.g., Frequency Division Duplex (FDD) scenario);

[0061] ① The carrier frequency is less than or equal to 3 GHz, n = 0, 1;

[0062] ② For the carrier frequency within FR1 greater than 3 GHz, n = 0, 1, 2, 3;

[0063] 3) For non-shared spectrum and belonging to unpaired spectrum (e.g., Time Division Duplex (TDD) scenario);

[0064] ① The carrier frequency is less than or equal to 2.4 GHz, n = 0, 1;

[0065] ② For the carrier frequency within FR1 greater than 2.4 GHz, n = 0, 1, 2, 3.

[0066] 4) For shared spectrum, n = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

[0067] (4) Case D - 120 kHz subcarrier spacing:

[0068] 1) The index of the first symbol of the SSB includes {4, 8, 16, 20} + 28 * n;

[0069] ① For the carrier frequency within FR2, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18.

[0070] (5) Case E - 240 kHz subcarrier spacing:

[0071] 1) The index of the first symbol of the SSB includes {8, 12, 16, 20, 32, 36, 40, 44} + 56 * n;

[0072] ① For the carrier frequency within FR2, n = 0, 1, 2, 3, 5, 6, 7, 8.

[0073] As Figure 1A shown, it is a schematic diagram of partial SSB patterns regarding FR1 in different cases in the NR system. As Figure 1B shown, it is a schematic diagram of partial SSB patterns regarding FR2 in different cases in the NR system. As Figure 1C shown, it is a schematic diagram of a group of SSB transmission opportunities within a half-frame taking the SSB pattern in Case A as an example.

[0074] In the NR system, the initial access process of the terminal device can be completed by detecting the Synchronization Signal / PBCH Block (SSB or SS / PBCH block) on the Sync Raster. The SSB is transmitted through the Discovery Burst Transmission Window or the SSB Transmission Opportunity Window. Among them, the Discovery Burst Transmission Window can also be called the DRS Transmission Opportunity Window. The DRS Transmission Opportunity Window or the SSB Transmission Opportunity Window appears periodically, and this period can be configured by the network device through high-layer parameters. The DRS Transmission Opportunity Window or the SSB Transmission Opportunity Window can include a set of candidate positions for SSB transmission. For FR1, a set of SSB transmission opportunities can include at most 8 SSBs, and for FR2, a set of SSB transmission opportunities can include at most 64 SSBs.

[0075] The SSB includes two types: one is the SSB for determining the cell, also called the cell-defining SSB. The cell-defining SSB is associated with the transmission of the system message of the cell, such as the transmission of the system information block 1 (SIB1), etc. After the terminal device searches for the cell-defining SSB, it can complete the initial access of the cell. The cell-defining SSB is always transmitted on the Sync Raster. In addition to being used for the initial access of the cell, the cell-defining SSB can also be used for SSB-based measurement. The other is the SSB that is not used for determining the cell, also called the non cell-defining SSB. The non cell-defining SSB is not associated with the transmission of the system message of the cell. The Physical Broadcast Channel (PBCH) of the non cell-defining SSB includes indication information, which is used to indicate the position of the cell-defining SSB. After the terminal device searches for the non cell-defining SSB, it can receive the cell-defining SSB according to this indication information, so as to complete the initial access of the cell. The non cell-defining SSB can be transmitted on the Sync Raster or not. The non cell-defining SSB is mainly used for the terminal device to perform measurements based on the SSB.

[0076] The network device indicates the actually transmitted SSB through indication information, where the indication information includes the ssb-PositionsInBurst in SIB1 and the SSB position indication information in the transmission opportunity in ServingCellConfigCommon; for example, the configuration information provided by ssb-PositionsInBurst. The terminal device expects the configuration information provided by ssb-PositionsInBurst in ServingCellConfigCommon to be the same as the configuration information provided by ssb-PositionsInBurst in SIB1. The terminal device can determine the actually transmitted SSB through the indication information of the network device, such as ssb-PositionsInBurst. The indication information corresponds to a bitmap, where the first bit in the bitmap corresponds to SSB index 0, the second bit in the bitmap corresponds to SSB index 1, and so on. By way of example, if the bit is 0, it is used to indicate that the SSB corresponding to the bit is not transmitted, and if the bit is 1, it is used to indicate that the SSB corresponding to the bit is transmitted. For example, assuming that the bitmap corresponding to ssb-PositionsInBurst on a serving cell is [10100000], it means that the SSB indexes of the SSBs transmitted on this serving cell are SSB 0 and SSB 2.

[0077] When receiving a Physical Downlink Shared Channel (PDSCH) scheduled by a SI-RNTI (System Information Radio Network Temporary Identifier) and the system information indicated in the Downlink Control Information (DCI) corresponding to the SI-RNTI is 0 (or when the SIB1 information is included in the PDSCH scheduled by the SI-RNTI), the terminal device shall assume that there is no resource element (RE) in the received PDSCH for SSB transmission.

[0078] When receiving a PDSCH scheduled by SI-RNTI and the system information indicated in the DCI corresponding to SI-RNTI is 1 (or when the system information other than SIB1 is included in the PDSCH scheduled by SI-RNTI), or when receiving a PDSCH scheduled by RA-RNTI (Random Access RNTI), MsgB-RNTI, P-RNTI (Paging RNTI), or TC-RNTI (Temporary C-RNTI), or when receiving a PDSCH scheduled by a Physical Downlink Control Channel (PDCCH) with a Cyclic Redundancy Code (CRC) scrambling code of C-RNTI (Cell RNTI), MCS-C-RNTI (Modulation and Coding Scheme C-RNTI), or CS-RNTI (Configured Scheduling RNTI), or when receiving a Semi-Persistent Scheduling (SPS) PDSCH, the terminal device shall assume the transmitted SSB according to the indication information such as ssb-PositionsInBurst. If the Physical Resource Blocks (PRBs) in the scheduled PDSCH overlap with the PRBs used for transmitting the SSB, then the terminal device shall assume that the resources corresponding to the overlapping PRBs on the symbols for transmitting the SSB (or the resources used for transmitting the SSB) are not used for PDSCH transmission.

[0079] In the NTN scenario shown in the embodiments of the present application, a satellite can serve multiple footprints through multiple beams. A footprint can be regarded as a coverage area on the ground and can also be called a coverage cell. Among them, the multiple footprints correspond to the same cell Identity (ID) or the same satellite cell. As Figure 2A shown, it is a schematic diagram of the NTN scenario applied in the embodiments of the present invention.

[0080] A footprint can correspond to one or more beams. Specifically, taking a footprint corresponding to one beam as an example, there can be 3 cases in the NTN network deployment scenario based on beams:

[0081] Case 1: The Frequency re-use factor is 1, asFigure 2B As shown, it is a schematic diagram of a frequency reuse factor of 1 in the NTN scenario.

[0082] Case 2: The frequency reuse factor is 3, as Figure 2C shown, it is a schematic diagram of a frequency reuse factor of 3 in the NTN scenario.

[0083] Case 3: The frequency reuse factor is 2, as Figure 2D shown, it is a schematic diagram of a frequency reuse factor of 2 in the NTN scenario.

[0084] However, in the NTN system, when a network device (such as a satellite) serves multiple ground coverage cells (footprints) through multiple beams, and these multiple footprints correspond to the same cell ID, different footprints may correspond to different frequency bands in the system bandwidth. In the embodiments of this application, how the terminal device performs rate matching for initial cell access or downlink data reception based on the SSB is the main issue discussed in this application.

[0085] Exemplarily, Figure 3A is a schematic diagram of the architecture of a communication system provided by an embodiment of this application. As Figure 3A shown, the communication system 100 may include a network device 110. The network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located within that coverage area.

[0086] Figure 3A Exemplarily, one network device and two terminal devices are shown. Optionally, the communication system 100 may include multiple network devices and each network device's coverage area may include other numbers of terminal devices. The embodiments of this application do not limit this.

[0087] Exemplarily, Figure 3B is another schematic diagram of the architecture of a communication system provided by an embodiment of this application. Please refer to Figure 3B , which includes a terminal device 1101 and a satellite 1102. Wireless communication can be carried out between the terminal device 1101 and the satellite 1102. The network formed between the terminal device 1101 and the satellite 1102 can also be referred to as NTN. In Figure 3BIn the architecture of the communication system shown, satellite 1102 can function as a base station, and direct communication can be established between terminal device 1101 and satellite 1102. Under this system architecture, satellite 1102 can be referred to as a network device. Optionally, the communication system may include multiple network devices 1102, and the coverage area of each network device 1102 may include other numbers of terminal devices, which is not limited in the embodiments of this application.

[0088] Exemplarily, Figure 3C FIG. is a schematic diagram of the architecture of another communication system provided by the embodiments of this application. Please refer to Figure 3C , including terminal device 1201, satellite 1202, and base station 1203. Wireless communication can be carried out between terminal device 1201 and satellite 1202, and communication can be established between satellite 1202 and base station 1203. The network formed by terminal device 1201, satellite 1202, and base station 1203 can also be referred to as NTN. In Figure 3C In the architecture of the communication system shown, satellite 1202 may not have the function of a base station, and communication between terminal device 1201 and base station 1203 needs to be relayed through satellite 1202. Under this system architecture, base station 1203 can be referred to as a network device. Optionally, the communication system may include multiple network devices 1203, and the coverage area of each network device 1203 may include other numbers of terminal devices, which is not limited in the embodiments of this application.

[0089] It should be noted that Figure 3A - Figure 3C only the systems applicable to this application are schematically illustrated by way of example. Of course, the methods shown in the embodiments of this application can also be applicable to other systems, such as 5G communication systems, LTE communication systems, etc., which are not specifically limited in the embodiments of this application.

[0090] Optionally, Figure 3A - Figure 3C the wireless communication system shown may also include other network entities such as a Mobility Management Entity (MME), an Access and Mobility Management Function (AMF), etc., which is not limited in the embodiments of this application.

[0091] The embodiments of this application describe each embodiment in combination with network devices and terminal devices. Among them, the terminal device can also be referred to as a User Equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile device, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device, etc.

[0092] The terminal device can be a station (STAION, ST) in a WLAN, and can be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA) device, handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0093] In the embodiments of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as on a ship, etc.); it can also be deployed in the air (such as on an airplane, balloon, satellite, etc.).

[0094] In the embodiments of the present application, the terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city or a wireless terminal device in smart home, etc.

[0095] By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. A wearable device, also known as a wearable intelligent device, is a general term for devices developed by applying wearable technologies to the intelligent design of daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that can be directly worn on the body or integrated into the user's clothes or accessories. A wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable intelligent devices include those with complete functions and large sizes that can achieve complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, etc., and those that only focus on a certain type of application function and need to cooperate with other devices such as smart phones, such as various smart bracelets and smart jewelry for physical sign monitoring.

[0096] Among them, the network device can also include an access network device and a core network device. That is, the wireless communication system also includes a plurality of core networks for communicating with the access network device. The access network device can be an evolved base station (evolutional node B, which can be abbreviated as eNB or e-NodeB) macro base station, micro base station (also known as "small base station"), pico base station, access point (AP), transmission point (TP), or new generation base station (new generation Node B, gNodeB) in a long-term evolution (LTE) system, a next radio (NR) system, or an authorized auxiliary access long-term evolution (LAA-LTE) system.

[0097] In the embodiments of the present application, the network device can be a device for communicating with a mobile device. The network device can be an access point (AP) in a WLAN, a base transceiver station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.

[0098] By way of example and not limitation, in the embodiments of the present application, the network device may have mobility characteristics. For example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station located on land, water, etc.

[0099] In the embodiments of the present application, the network device may 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 in other words, spectrum resources). The cell may be the cell corresponding to the network device (such as a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. Here, the small cell may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage range and low transmission power, and are suitable for providing high-rate data transmission services.

[0100] It should be understood that in the embodiments of the present application, a device with communication functions in the network / system may be referred to as a communication device. Taking Figure 3A - Figure 3B the shown communication system as an example, the communication device may include a network device and a terminal device with communication functions. The network device and the terminal device may be the specific devices described in the embodiments of the present invention, which will not be elaborated here; the communication device may also include other devices in the communication system, such as other network entities like a network controller and a mobility management entity. The embodiments of the present application do not make limitations in this regard.

[0101] The technical solutions of the embodiments of this application can be applied to various communication systems, such as: 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, evolved system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system or other communication systems, etc.

[0102] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technologies, mobile communication systems will not only support traditional communications, but also support, for example, Device to Device (D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. The embodiments of this application can also be applied to these communication systems.

[0103] The communication system in the embodiments of this application can be applied to a Carrier Aggregation (CA) scenario, a Dual Connectivity (DC) scenario, or a Standalone (SA) networking scenario.

[0104] Optionally, the communication system in the embodiments of this application can be applied to unlicensed spectrum, where unlicensed spectrum can also be considered as shared spectrum; or, the communication system in the embodiments of this application can also be applied to licensed spectrum, where licensed spectrum can also be considered as non-shared spectrum.

[0105] Optionally, the embodiments of this application can be applied to a Non-Terrestrial Networks (NTN) system or a Terrestrial Networks (TN) system.

[0106] It should be understood that the terms "system" and "network" can often be used interchangeably in this application. The term " / or" in this application is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0107] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or a representation of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0108] In the description of the embodiments of this application, the term "corresponding" can represent a direct or indirect corresponding relationship between two entities, or can also represent an association relationship between them, or can be an indication and being indicated, configuration and being configured, etc.

[0109] Optionally, the indication information in the embodiments of this application includes at least one of physical layer signaling such as Downlink Control Information (DCI), Radio Resource Control (RRC) signaling, and Media Access Control Control Element (MAC CE).

[0110] Optionally, the high-layer parameters or high-layer signaling in the embodiments of the present application include at least one of Radio Resource Control (RRC) signaling and Media Access Control Control Element (MAC CE).

[0111] The technical solution of the present invention will be further described below by way of embodiments. The embodiments of the present application include some or all of the following content:

[0112] In the present application, the cell identifiers (cell IDs) corresponding to multiple footprint (FP) cells are the same. Taking Case 2 in the above content, one footprint corresponding to one beam, and the SSB transmission pattern being Case A as an example for description, for Case 1, or Case 3, or one footprint corresponding to multiple beams, or other SSB transmission pattern scenarios, they can be obtained similarly through the method in the present application, and will not be elaborated one by one below.

[0113] Taking Figure 2C each frequency resource segment in the corresponding Case 2 corresponding to one Bandwidth Part (BWP) as an example for network deployment, then one footprint corresponds to one BWP, and different SSB indexes can correspond to different BWPs in the NTN network. As Figure 4A shown, it is an example diagram of the NTN network deployment scenario based on beams in the embodiments of the present invention. In Figure 4A the shown figure, B represents a beam, or the index of the SSB. For example, B0 refers to SSB0, B1 refers to SSB1, and so on. FP represents the footprint cell on the ground shown as a hexagon. For example, FP0 indicates that the ID of this footprint cell is 0, FP1 indicates that the ID of this footprint cell is 1, and so on. BWP0 indicates that the ID of the BWP corresponding to this footprint cell is 0, BWP1 indicates that the ID of the BWP corresponding to this footprint cell is 1, and so on.

[0114] Figure 4B - Figure 4E It is an example diagram of several ways for the network device to perform SSB transmission in the embodiments of the present invention. It should be understood that this SSB transmission method is only an example, and the embodiments of the present application can also be applied to other SSB transmission scenarios, and the present application does not limit this. In these examples, it is assumed that the number of SSBs that the network device needs to send is 8, that is, a group of SSB transmissions includes 8 SSBs. Among them, different beams corresponding to different BWPs are used to transmit different or the same SSB indexes, and the BWP identifier and the SSB index can be a one-to-many relationship, as Figure 4AAs shown, the corresponding beams in BWP0 are SSB0 and SSB7, the corresponding beams in BWP1 are SSB1, SSB3 and SSB5, and the corresponding beams in BWP2 are SSB2, SSB4 and SSB6.

[0115] The following separately describes several methods for the network device to perform SSB transmission, as shown below:

[0116] Method 1: Refer to Figure 4B , the SSB transmission method is different from that in Rel-15. According to the association relationship between the SSB index and the BWP identifier, the cell-defining SSBs are sent on their respective corresponding BWPs. That is, SSB0 and SSB7 are sent through BWP0, SSB1, SSB3 and SSB5 are sent through BWP1, and SSB2, SSB4 and SSB6 are sent through BWP2.

[0117] Optionally, in this case, BWP0, BWP1 and BWP2 can all be considered as the initial BWPs. Or rather, from the perspective of the network device, a cell can include multiple initial BWPs.

[0118] Optionally, in this case, from the perspective of the terminal device, it can be considered that there is only one initial BWP.

[0119] Optionally, in this case, for the convenience of indication, from the perspective of the terminal device, it can also be considered that there are multiple initial BWPs.

[0120] Optionally, since the ID of the initial BWP is usually 0, in this case, it can also be considered that Figure 4B the IDs corresponding to the three BWPs in

[0121] are all BWP0, or the three BWPs are respectively the first BWP in BWP0, the second BWP in BWP0 and the third BWP in BWP0. Figure 4C , the SSB transmission method is different from that in Rel-15. Assuming that BWP0 is the initial BWP in the cell, then this group of SSBs is transmitted through BWP0, and this group of SSBs is the cell-defining SSBs. In addition, some SSBs in this group of SSBs are also transmitted on BWP1 and BWP2, and there is an association relationship between BWP1 or BWP2 and some SSBs in this group of SSBs transmitted on BWP0. That is, SSB1, SSB3 and SSB5 are also sent through BWP1, and SSB2, SSB4 and SSB6 are also sent through BWP2. Among them, the SSBs transmitted on BWP1 and BWP2 are non cell-defining SSBs.

[0122] Optionally, the SSBs transmitted on BWP1 and BWP2 also need to be sent on the synchronization grid.

[0123] Method 3: Refer to Figure 4D , the SSB transmission method is similar to that in Rel-15. Assuming that BWP0 is the initial BWP in the cell, then this group of SSBs is transmitted through BWP0, and this group of SSBs is the cell-defining SSBs. In addition, this group of SSBs is also transmitted on BWP1 and BWP2, and the SSBs transmitted on BWP1 and BWP2 are non cell-defining SSBs.

[0124] Optionally, the SSBs transmitted on BWP1 and BWP2 also need to be sent on the synchronization raster.

[0125] Method 4: Refer to Figure 4E , the SSB transmission method is the same as that in Rel-15. Assuming that BWP0 is the initial BWP in the cell, then this group of SSBs is transmitted through BWP0, and this group of SSBs is the cell-defining SSBs. There may be no SSB transmission on BWP1 and / or BWP2.

[0126] As Figure 5 shown, it is a schematic diagram of an embodiment of the transmission method of the synchronization signal block SSB in the embodiment of the present application, which may include:

[0127] 501. The network device sends first indication information to the terminal device, and the first indication information is used to indicate the frequency domain position of the synchronization signal block SSB and / or the covered cell corresponding to the SSB. The terminal device receives the first indication information sent by the network device.

[0128] 502. The terminal device determines the frequency domain position of the SSB and / or the covered cell corresponding to the SSB according to the first indication information. It can be understood that step 502 is an optional step.

[0129] Optionally, the first indication information includes indication information of the frequency domain position of the synchronization signal block SSB and / or indication information of the covered cell corresponding to the SSB. Accordingly, the terminal device determines the frequency domain position of the SSB according to the indication information of the frequency domain position of the SSB and / or determines the covered cell of the SSB according to the indication information of the covered cell corresponding to the SSB.

[0130] Optionally, the first indication information includes indication information of the frequency domain position of at least one SSB and / or indication information of the covered cell corresponding to the at least one SSB. Accordingly, the terminal device determines the frequency domain position of at least one SSB according to the indication information of the frequency domain position of at least one SSB and / or determines the covered cell corresponding to at least one SSB according to the indication information of the covered cell corresponding to at least one SSB.

[0131] Optionally, the first indication information is used to indicate at least two frequency-domain positions of the SSB.

[0132] Optionally, the indication information of the frequency-domain position of the SSB includes: the indication information of at least two frequency-domain positions of the SSB. Accordingly, the terminal device determines at least two frequency-domain positions of the SSB according to the indication information of at least two frequency-domain positions of the SSB.

[0133] Optionally, the frequency-domain position of the SSB, or the indication information of the frequency-domain position of the SSB, may include at least one of the following:

[0134] The number of the synchronization grid transmitted by the SSB to indicate the synchronization grid transmitted by the SSB;

[0135] The identification ID of the BWP transmitted by the SSB to indicate the bandwidth part BWP transmitted by the SSB;

[0136] The frequency-domain position of the SSB in the BWP transmitted by the SSB can be understood as the specific frequency-domain position in different BWPs transmitted by the SSB;

[0137] The identification ID of the set of resource blocks (RBs) transmitted by the SSB to indicate the set of resource blocks RB transmitted by the SSB;

[0138] And, the frequency-domain position of the SSB in the set of RBs transmitted by the SSB can be understood as the specific frequency-domain position in different sets of RBs transmitted by the SSB.

[0139] Optionally, the RB may also include a PRB.

[0140] Optionally, the frequency-domain position of the SSB in the BWP transmitted by the SSB may include at least one of the following:

[0141] The RB number of the first RB transmitted by the SSB in the BWP; for example, SSB1 is sent through BWP1, BWP1 includes 50 PRBs numbered from 0 to 49, SSB1 includes 20 PRBs, assuming the number of the first PRB transmitted by SSB1 is 10, then the PRBs occupied by SSB1 in BWP1 are PRB10 to PRB29.

[0142] The frequency-domain offset (e.g., RB count offset) between the first RB for SSB transmission and the first RB in the BWP; for example, SSB1 is transmitted through BWP1, BWP1 includes 50 PRBs numbered from 0 to 49, SSB1 includes 20 PRBs. Assuming the frequency-domain offset between the first PRB for SSB1 transmission and the first RB in BWP1 is 5 PRBs, then the number of the first PRB for SSB1 transmission is 5, and the PRBs occupied by SSB1 in BWP1 are PRB5 to PRB24.

[0143] The position of the synchronization raster for SSB transmission in the synchronization rasters included in the BWP; for example, if the BWP includes 3 synchronization rasters, this position can indicate which of the 3 synchronization rasters is the synchronization raster for SSB transmission.

[0144] The synchronization raster number of the synchronization raster for SSB transmission in the synchronization rasters included in the BWP; for example, this synchronization raster number can be understood as an absolute number.

[0145] Optionally, the coverage cell corresponding to the SSB, or the indication information of the coverage cell corresponding to the SSB, may include at least one of the following:

[0146] The ID of the coverage cell corresponding to the SSB;

[0147] The association relationship between the coverage cell corresponding to the SSB and the BWP; and,

[0148] The association relationship between the ID of the coverage cell corresponding to the SSB and the ID of the BWP.

[0149] Optionally, the first indication information is used to indicate at least one of the following:

[0150] The association relationship between the index of at least one SSB in the SSB and the synchronization raster transmitted by the at least one SSB. For example, the first indication information is used to indicate the SSB transmitted (or not transmitted) in the first SSB transmission opportunity on the first synchronization raster.

[0151] The association relationship between the index of at least one SSB in the SSB and the index of the BWP transmitted by the at least one SSB. For example, a BWP may include one SSB transmission opportunity, and there is an association relationship between the BWP index and the SSB index in the SSB transmission opportunity on this BWP, or the first indication information is used to indicate the SSB transmitted (or not transmitted) in the first SSB transmission opportunity on the first BWP.

[0152] The association relationship between the index of at least one SSB among the SSBs and the frequency-domain position of the at least one SSB in the BWP in which the at least one SSB is transmitted. For example, if the BWPs for transmitting cell-defining SSBs are all BWP 0, then the multiple SSB transmission opportunities transmitted in BWP0 are sorted in ascending order according to the frequency-domain position, and the association relationship between the SSB index and the SSB transmission opportunity index in BWP 0 is notified. Alternatively, the first indication information is used to indicate the SSB that is transmitted (or not transmitted) in the first SSB transmission opportunity corresponding to the first SSB transmission opportunity index on the first BWP.

[0153] The association relationship between the index of at least one SSB among the SSBs and the SSB type corresponding to the at least one SSB, where the SSB type includes the SSB for defining a cell and the SSB for not defining a cell.

[0154] The association relationship between the index of at least one SSB among the SSBs and the index of the RB set in which the at least one SSB is transmitted. For example, one RB set may include one SSB transmission opportunity, and there is an association relationship between the RB set index and the SSB index in the SSB transmission opportunity on the RB set. Alternatively, the first indication information is used to indicate the SSB that is transmitted (or not transmitted) in the first SSB transmission opportunity on the first RB set.

[0155] The association relationship between the index of at least one SSB among the SSBs and the frequency-domain position of the at least one SSB in the (transmission). For example, if the RB sets for transmitting cell-defining SSBs are all RB set 0, then the multiple SSB transmission opportunities transmitted in RB set 0 are sorted in ascending order according to the frequency-domain position, and the association relationship between the SSB index and the SSB transmission opportunity index in RB set 0 is notified. Alternatively, the first indication information is used to indicate the SSB that is transmitted (or not transmitted) in the first SSB transmission opportunity corresponding to the first SSB transmission opportunity index on the first RB set.

[0156] The association relationship between the index of at least one SSB among the SSBs and the ID of at least one covered cell corresponding to the at least one SSB.

[0157] The association relationship between the ID of at least one covered cell and the ID of at least one BWP, where the at least one covered cell and the at least one BWP correspond to the same SSB.

[0158] And, the association relationship between at least two of the following: the ID of at least one covered cell, the ID of at least one BWP, and at least one SSB index.

[0159] As an example, the association relationship between the covered cell ID and the BWP ID includes: q = p mod N, where p represents the covered cell ID, q represents the BWP ID, and N represents the number of BWPs. For example, assuming that the frequency bands in a cell can be divided into 3 BWPs, the BWP IDs q corresponding to the covered cells with covered cell IDs p from 0 to 9 are: 0, 1, 2, 0, 1, 2, 0, 1, 2, 0.

[0160] As an example, the association relationship between the covered cell ID and the SSB index includes: s = p mod N, where p represents the covered cell ID, s represents the SSB index, and M represents the number of SSBs transmitted. For example, assuming that the number of SSBs transmitted in the SSB transmission opportunities in a cell is 6 SSBs, the SSB indices corresponding to the covered cells with covered cell IDs p from 0 to 9 are: 0, 1, 2, 3, 4, 5, 0, 1, 2, 3.

[0161] As an example, the association relationship between the SSB index and the BWP ID includes: q = s mod N, where s represents the SSB index, q represents the BWP ID, and N represents the number of BWPs. For example, assuming that the frequency bands in a cell can be divided into 3 BWPs and the number of SSBs transmitted in the SSB transmission opportunities is 8 SSBs, for SSB indices s from 0 to 7, the corresponding BWP IDs q are: 0, 1, 2, 0, 1, 2, 0.

[0162] Optionally, the first indication information is used to determine that the SSB of the defined cell is located at a frequency domain position; or, the first indication information is used to determine that at least two SSBs of the defined cell are located at different frequency domain positions.

[0163] Optionally, the indication information of the frequency domain position of the SSB is used to indicate that the SSB of the defined cell is located at a frequency domain position; or, the indication information of the frequency domain position of the SSB is used to indicate that at least two SSBs of the defined cell are located at different frequency domain positions. It can be understood that if the number of SSBs of the defined cell is one, then the indication information of the frequency domain position of this SSB is used to indicate that one SSB of the defined cell is located at a frequency domain position; if the number of SSBs of the defined cell is at least two, then the indication information of the frequency domain position of this SSB is used to indicate that at least two SSBs of the defined cell are located at the same frequency domain position. Or, if the number of SSBs of the defined cell is at least two, then the indication information of the frequency domain position of this SSB is used to indicate that at least two SSBs of the defined cell are located at different frequency domain positions.

[0164] Optionally, the network device sending the first indication information to the terminal device may include: the network device sending the first indication information to the terminal device through a Physical Broadcast Channel (PBCH), system information, or high-layer parameters.

[0165] Optionally, the system information includes at least one of the following: Master Information Block (MIB), System Information Block 1 (SIB1), and other SIBs other than SIB1.

[0166] Optionally, other SIBs other than SIB1 may be one or more of SIB2 - SIB14, posSIBs (Positioning SIB). Exemplarily, the first indication information is sent through PBCH, or the first indication information is sent through an MIB message, or the first indication information is sent through an SIB1 message, or the first indication information is sent through other SIB messages other than SIB1 messages, or the first indication information is sent through high-layer parameters (such as Serving Cell Config Common).

[0167] As an example, the first indication information includes ssb-PositionsInBurst in SIB1; and / or, the first indication information includes ssb-PositionsInBurst in ServingCellConfigCommon.

[0168] Optionally, the configuration information provided by the first indication information included in different configuration parameters is the same. Exemplarily, ssb-PositionsInBurst in SIB1 and ssb-PositionsInBurst in ServingCellConfigCommon provide the same configuration information.

[0169] Optionally, the SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency-domain position of the SSB, including: the first indication information is used to indicate the frequency-domain position of at least one transmitted SSB in the at least one transmission opportunity; or, the first indication information is used to indicate the frequency-domain position of at least one untransmitted SSB in the at least one transmission opportunity.

[0170] Optionally, the SSB includes the SSB in at least one transmission opportunity, and the indication information of the frequency-domain position of the SSB may include: the indication information of the frequency-domain position of at least one transmitted SSB in the at least one transmission opportunity; or, the indication information of the frequency-domain position of at least one non-transmitted SSB in the at least one transmission opportunity.

[0171] Optionally, the SSB includes the SSB in the SSB transmission window; or, the SSB includes the SSB in the DRS transmission window.

[0172] It can be understood that the same time-domain position with different frequency-domain positions can be considered as one transmission opportunity, or can also be considered as multiple transmission opportunities.

[0173] Exemplarily, the indication information of the frequency-domain position of the SSB includes the indication information of the frequency-domain position of the SSB in multiple transmission opportunities, where the indication information of the frequency-domain position of the SSB in different transmission opportunities is associated with different frequency-domain positions. For example, assume that the bitmap corresponding to ssb-PositionsInBurst on a serving cell includes [10000001] associated with BWP0, [01010100] associated with BWP1, and [00101010] associated with BWP2. Then it indicates that the SSB indexes of the SSBs transmitted on this serving cell, SSB0 and SSB7, are transmitted through BWP0, SSB1, SSB3, and SSB5 are transmitted through BWP1, and SSB2, SSB4, and SSB6 are transmitted through BWP2.

[0174] Optionally, the SSBs with the same SSB index transmitted in the SSB have the same Quasi Co-Location (QCL) relationship. Exemplarily, the SSBs with the same SSB index transmitted on different BWPs can be considered to have the same QCL relationship.

[0175] Optionally, the first indication information is further used to indicate the time-domain position of the SSB.

[0176] Optionally, the first indication information may further include the indication information of the time-domain position of the SSB.

[0177] Optionally, the first indication information is further used to determine the first SSB position of the SSB transmitted on the active BWP. That is, the terminal device determines the first SSB position of the SSB transmitted on the active BWP according to the first indication information.

[0178] Optionally, the method further includes: the terminal device receiving a first physical downlink shared channel (PDSCH) sent by the network device on the activated BWP according to the first SSB position; when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission, and the first PDSCH includes at least one of the following situations:

[0179] The PDSCH scheduled by a PDCCH with a CRC scrambling code of SI-RNTI and the system message indicated in the DCI in the PDCCH is 1;

[0180] The PDSCH scheduled by a PDCCH with a CRC scrambling code of SI-RNTI and other SIBs other than SIB1 are included in the PDSCH;

[0181] The PDSCH scheduled by a PDCCH with a CRC scrambling code of RA-RNTI, MsgB-RNTI, P-RNTI, or TC-RNTI;

[0182] The PDSCH scheduled by a PDCCH with a CRC scrambling code of C-RNTI, MCS-C-RNTI, or CS-RNTI; and,

[0183] SPS PDSCH.

[0184] Optionally, the method further includes: when the terminal device receives the first indication information sent by the network device through a PBCH or an MIB, and the terminal device receives a first PDSCH scheduled by a PDCCH with a CRC scrambling code of SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives a first PDSCH scheduled by a PDCCH with a CRC scrambling code of SI-RNTI and SIB1 is included in the first PDSCH, the terminal device receives the first PDSCH according to the first SSB position; when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission.

[0185] Optionally, the method further includes: when the terminal device receives a first PDSCH scheduled by a PDCCH with a CRC scrambling code of SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives a first PDSCH scheduled by a PDCCH with a CRC scrambling code of SI-RNTI and the first PDSCH includes SIB1, the terminal device determines that there is no resource element (RE) in the REs included in the first PDSCH for SSB transmission. Further optionally, the first indication information is included in the first PDSCH.

[0186] In an embodiment of the present invention, a terminal device receives first indication information sent by a network device, where the first indication information is used to indicate the frequency domain position of a synchronization signal block (SSB) and / or the coverage cell corresponding to the SSB. The terminal device may complete initial access and match the data rate of downlink reception according to the first indication information. Through the method of the embodiment of the present application, in the case where the frequency reuse factor of the NTN system is greater than 1, terminal devices in different coverage cells on the ground can correctly complete the rate matching of initial access and downlink data reception in the NTN system.

[0187] The following combines Figure 4A As shown, taking the terminal device located in BWP2, B6, footprint0 as an example, the first indication information, the initial access behavior of the terminal device, and the downlink reception rate matching based on the SSB corresponding to each of the above four methods are illustrated by examples.

[0188] Method 1:

[0189] The first indication information is used to indicate the frequency domain position of the SSB in the DRS transmission opportunity window or the SSB transmission opportunity window and / or the coverage cell corresponding to the SSB. As an example, when the first indication information indicates the frequency domain position of the SSB, it may be: the first indication information indicates the association relationship between the BWP identifier and the SSB index transmitted in the SSB transmission opportunity in the BWP. For example, the first indication information includes 3 rows of bitmaps, each row of bitmap includes 8 bits, and each row of bitmap is associated with a BWP ID. Among them, the first row of bitmap is [10000001], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity on BWP0 are SSB0 and SSB7; the second row of bitmap is [01010100], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity on BWP1 are SSB1, SSB3, and SSB5; the third row of bitmap is [00101010], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity on BWP2 are SSB2, SSB4, and SSB6.

[0190] Optionally, the first indication information indicates the frequency domain position of the cell-defining SSB.

[0191] Optionally, the first indication information is transmitted through at least one of PBCH, MIB, and SIB1. For example, the first indication information includes ssb-PositionsInBurst in SIB1.

[0192] Optionally, the first indication information is transmitted through high-layer signaling. For example, the first indication information includes ssb-PositionsInBurst in ServingCellConfigCommon.

[0193] Optionally, the configuration information provided by the first indication information included in different configuration parameters is the same.

[0194] As an example, the first indication information indicates the coverage cell corresponding to the SSB, which may be: the first indication information indicates the association relationship between the coverage cell ID and the SSB index transmitted in the SSB transmission opportunity in the BWP.

[0195] When the terminal device performs initial access, since its geographical location corresponds to the coverage range of BWP2 and B6 of FP0, it can detect SSB6 in BWP2 and access the network through SSB6 detected in BWP2. It can be understood that BWP2 here can be the active BWP or the initial BWP. Further, the terminal device can receive the first indication information according to the system message associated with SSB6, and determine the SSBs transmitted on different BWPs in the cell according to the first indication information, or the association information between the BWP and the SSB, or the association information between the coverage cell and the SSB, or the association information between the coverage cell and the BWP, or the association information among the coverage cell, the BWP, and the SSB. The terminal device can measure the corresponding BWP according to the information of the SSBs transmitted on different BWPs, or the terminal device can determine the corresponding BWP information after detecting the SSBs on other BWPs.

[0196] Optionally, the terminal device determines that the SSBs transmitted on BWP2 according to the first indication information include SSB2, SSB4, and SSB6, and further determines the rate matching for downlink data reception.

[0197] When the terminal device receives the PDSCH scheduled by SI-RNTI and the system information indication included in the DCI corresponding to SI-RNTI is 0 (or when the SIB1 information is included in the PDSCH scheduled by SI-RNTI), the terminal device shall assume that there is no RE for SSB transmission in the REs included in the received PDSCH.

[0198] When the terminal device receives a PDSCH scheduled by SI-RNTI and the system information indicated in the DCI corresponding to SI-RNTI is 1 (or when the system information other than SIB1 is included in the PDSCH scheduled by SI-RNTI), or receives a PDSCH scheduled by RA-RNTI, MsgB-RNTI, P-RNTI or TC-RNTI, or receives a PDSCH scheduled by a PDCCH with a CRC scrambling code of C-RNTI, MCS-C-RNTI or CS-RNTI, or receives an SPS PDSCH, the terminal device shall determine that the SSBs transmitted on BWP2 include SSB2, SSB4 and SSB6 according to the first indication information. If the PRBs in the scheduled PDSCH overlap with the PRBs used for transmitting SSBs (i.e., SSB2, SSB4 or SSB6), then the terminal device shall assume that the resources corresponding to the overlapping PRBs on the symbols for transmitting SSBs (or the resources for transmitting SSBs) are not used for PDSCH transmission.

[0199] Method 2:

[0200] The first indication information is used to indicate the frequency-domain position of the SSB in the DRS transmission opportunity window or the SSB transmission opportunity window and / or the covered cell corresponding to the SSB. As an example, when the first indication information indicates the frequency-domain position of the SSB, it may be: the first indication information indicates the association relationship between the BWP identifier and the SSB index transmitted in the SSB transmission opportunity in the BWP. For example, the first indication information includes 3 rows of bitmaps, each row of bitmap includes 8 bits, and each row of bitmap is associated with a BWP ID. Among them, the first row of bitmap is [11111111], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity on BWP0 are SSB0 to SSB7; the second row of bitmap is [01010100], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity on BWP1 are SSB1, SSB3 and SSB5; the third row of bitmap is [00101010], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity on BWP2 are SSB2, SSB4 and SSB6.

[0201] Optionally, the SSB transmitted in BWP0 is the cell-defining SSB, and the SSBs transmitted in BWP1 and BWP2 are noncell-defining SSBs.

[0202] Optionally, the terminal device determines the initial BWP according to the indication information of the network device. For example, since the SSB sent in the first row includes the SSBs sent in the second and third rows, the terminal device can determine, according to the first indication information, that the SSB for sending cell-defining is BWP0, or the first indication information is further used to indicate the position of the initial BWP.

[0203] Optionally, the first indication information is transmitted through at least one of PBCH, MIB, and SIB1. For example, the first indication information includes ssb-PositionsInBurst in SIB1.

[0204] Optionally, the first indication information is transmitted through high-layer signaling. For example, the first indication information includes ssb-PositionsInBurst in ServingCellConfigCommon.

[0205] Optionally, the configuration information provided by the first indication information included in different configuration parameters is the same.

[0206] As an example, the first indication information indicates the covered cell corresponding to the SSB, which can be: the first indication information indicates the association relationship between the covered cell ID and the SSB index transmitted in the SSB transmission opportunity in the BWP.

[0207] When the terminal device performs initial access, since its geographical location is the coverage range of BWP2 corresponding to FP0 and B6, it can detect SSB6 in BWP2. Since SSB6 in BWP2 is a non cell-defining SSB, after the terminal device searches for the non cell-defining SSB6 in BWP2, it can receive the cell-defining SSB at the position of SSB6 in BWP1 according to the indication information in SSB6 in BWP2, so as to access the network. It can be understood that BWP2 here can be the active BWP. Further, the terminal device can receive the first indication information according to the system message associated with SSB6 on BWP1 or PBCH or MIB in BWP2, and determine the SSBs transmitted on different BWPs in the cell according to the first indication information, or the association information between the BWP and the SSB, or the association information between the covered cell and the SSB, or the association information between the covered cell and the BWP, or the association information among the covered cell, the BWP, and the SSB. The terminal device can measure the corresponding BWP according to the information of the SSBs transmitted on different BWPs, or the terminal device can determine the corresponding BWP information after detecting the SSBs on other BWPs.

[0208] The terminal device determines that the SSBs transmitted on BWP2 include SSB2, SSB4, and SSB6 according to the first indication information, and further determines the rate matching for downlink data reception.

[0209] When the terminal device receives a PDSCH scheduled by SI-RNTI and the system information indicated in the DCI corresponding to SI-RNTI is 0 (or when the SIB1 information is included in the received PDSCH scheduled by SI-RNTI), the terminal device shall assume that there is no RE in the REs included in the received PDSCH for SSB transmission.

[0210] When the terminal device receives a PDSCH scheduled by SI-RNTI and the system information indicated in the DCI corresponding to SI-RNTI is 1 (or when the system information other than SIB1 is included in the received PDSCH scheduled by SI-RNTI), or receives a PDSCH scheduled by RA-RNTI, MsgB-RNTI, P-RNTI, or TC-RNTI, or receives a PDSCH scheduled by a PDCCH with a CRC scrambling code of C-RNTI, MCS-C-RNTI, or CS-RNTI, or receives an SPS PDSCH, the terminal device shall determine that the SSBs transmitted on BWP2 include SSB2, SSB4, and SSB6 according to the first indication information. If the PRBs in the scheduled PDSCH overlap with the PRBs used for transmitting SSBs (i.e., SSB2, SSB4, or SSB6), then the terminal device shall assume that the resources corresponding to the overlapping PRBs on the symbols for SSB transmission (or the resources used for transmitting SSBs) are not used for PDSCH transmission.

[0211] Mode 3:

[0212] The first indication information is used to indicate the frequency-domain position of the SSB and / or the covered cell corresponding to the SSB in the DRS transmission opportunity window or the SSB transmission opportunity window. As an example, when the first indication information indicates the frequency-domain position of the SSB, it may be: the first indication information indicates the BWP identifier including the SSB transmission opportunity, where the SSB indexes transmitted in each SSB transmission opportunity are the same. For example, the first indication information includes a 1-row 8-bit bitmap, and each row of the bitmap is associated with a BWP ID. The bitmap is [11111111], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity are SSB0 to SSB7; the first indication information also includes BWP index indication information or the frequency-domain position of the first RB in the BWP corresponding to the BWP index, which is used to indicate the BWP in the cell that sends the SSB transmission opportunity. For example, assuming that the cell can include at most 4 BWPs, the first indication information also includes a 1-row 4-bit bitmap, and the bitmap is

[1110] , which is used to indicate that the SSB transmission opportunities on BWP0, BWP1, and BWP2 include the transmitted SSBs.

[0213] Optionally, the SSB transmitted in BWP0 is a cell-defining SSB, and the SSBs transmitted in BWP1 and BWP2 are non-cell-defining SSBs.

[0214] Optionally, the terminal device determines the initial BWP according to the indication information of the network device. For example, the first indication information is further used to indicate the position of the initial BWP, and the terminal device can determine that the BWP for transmitting the cell-defining SSB is BWP0 according to the first indication information.

[0215] Optionally, the first indication information is transmitted through at least one of PBCH, MIB, and SIB1. For example, the first indication information includes ssb-PositionsInBurst in SIB1.

[0216] Optionally, the first indication information is transmitted through high-layer signaling. For example, the first indication information includes ssb-PositionsInBurst in ServingCellConfigCommon.

[0217] Optionally, the configuration information provided by the first indication information included in different configuration parameters is the same.

[0218] As an example, the first indication information indicates the covered cell corresponding to the SSB, which may be: the first indication information indicates the association relationship between the covered cell ID and the SSB index transmitted in the SSB transmission opportunity in the BWP.

[0219] When the terminal device performs initial access, since the geographical location FP0 where it is located corresponds to the coverage area of BWP2 and B6, it can detect SSB6 in BWP2. Since the SSB6 in BWP2 is a non cell-defining SSB, after the terminal device searches for the non cell-defining SSB6 in BWP2, it can receive the cell-defining SSB at the position of SSB6 in BWP1 according to the indication information in the SSB6 in BWP2, so as to access the network. It can be understood that BWP2 here can be the active BWP. Further, the terminal device can receive the first indication information according to the system message associated with SSB6 on BWP1 or PBCH or MIB in BWP2, and determine the SSBs transmitted on different BWPs in the cell according to the first indication information. The terminal device can measure the corresponding BWP according to the information of the SSBs transmitted on different BWPs, or the terminal device can determine the corresponding BWP information after detecting the SSBs on other BWPs.

[0220] The terminal device determines that the SSBs transmitted on BWP2 include SSB0 to SSB7 according to the first indication information, and then determines the rate matching for downlink data reception.

[0221] When the terminal device receives a PDSCH scheduled by SI-RNTI and the system information indicated in the DCI corresponding to SI-RNTI is 0 (or when the SIB1 information is included in the received PDSCH scheduled by SI-RNTI), the terminal device shall assume that there is no RE in the REs included in the received PDSCH for SSB transmission.

[0222] When the terminal device receives a PDSCH scheduled by SI-RNTI and the system information indicated in the DCI corresponding to SI-RNTI is 1 (or when the system information other than SIB1 is included in the received PDSCH scheduled by SI-RNTI), or receives a PDSCH scheduled by RA-RNTI, MsgB-RNTI, P-RNTI or TC-RNTI, or receives a PDSCH scheduled by a PDCCH with a CRC scrambling code of C-RNTI, MCS-C-RNTI or CS-RNTI, or receives an SPS PDSCH, the terminal device shall determine that the SSBs transmitted on BWP2 include SSB2, SSB4 and SSB6 according to the first indication information. If the PRBs in the scheduled PDSCH overlap with the PRBs used for transmitting SSBs (i.e., at least one SSB among SSB0 to SSB7), then the terminal device shall assume that the resources corresponding to the overlapping PRBs on the symbols for SSB transmission (or the resources used for transmitting SSBs) are not used for PDSCH transmission.

[0223] Method 4:

[0224] The first indication information is used to indicate the frequency-domain position of the SSB in the DRS transmission opportunity window or the SSB transmission opportunity window and / or the covered cell corresponding to the SSB. As an example, the first indication information indicates the frequency-domain position of the SSB. Since this method is the same as the SSB transmission method in Rel-15, the first indication information includes ssb-PositionsInBurst. For example, the first indication information includes a 1-row 8-bit bitmap, and each row of the bitmap is associated with a BWP ID. This bitmap is [11111111], which is used to indicate that the SSBs transmitted in the SSB transmission opportunity are SSB0 to SSB7. The first indication information also includes an indication information of the association relationship between the BWP identifier or the frequency-domain position of the first RB in the BWP corresponding to the BWP identifier and the SSB index, which is used to indicate the SSB index associated with the BWP in this cell. For example, the first indication information is used to indicate the association relationship as shown in Table 2 below.

[0225] foot print identification BWP identification SSB index 0 BWP0 0 1 BWP1 1 2 BWP2 2 3 BWP1 3 4 BWP2 4 5 BWP1 5 6 BWP2 6 7 BWP0 7

[0226] Table 2

[0227] Optionally, the terminal device determines the initial BWP according to the indication information of the network device. For example, the first indication information is further used to indicate the position of the initial BWP. The terminal device can determine that the SSB for transmitting cell-defining is BWP0 according to the first indication information.

[0228] Optionally, the first indication information is transmitted through at least one of PBCH, MIB, and SIB1. For example, the first indication information includes ssb-PositionsInBurst in SIB1.

[0229] Optionally, the first indication information is transmitted through higher layer signaling. For example, the first indication information includes ssb-PositionsInBurst in ServingCellConfigCommon.

[0230] Optionally, the configuration information provided by the first indication information included in different configuration parameters is the same.

[0231] As an example, the first indication information indicates the coverage cell corresponding to the SSB, which may be: the first indication information indicates the association relationship between the coverage cell ID and the SSB index transmitted in the SSB transmission opportunity in the BWP.

[0232] When the terminal device performs initial access, since its geographical location FP0 corresponds to the coverage range of BWP2 and B6 (corresponding to footprint index 6), it can detect SSB6 in BWP0 and thus access the network. It can be understood that BWP2 here can be the active BWP. Further, the terminal device can determine that the BWP associated with SSB6 is BWP2 according to the first indication information, and thus perform data transmission on BWP2 according to the beam direction corresponding to SSB6.

[0233] The terminal device determines that BWP2 does not include SSB transmission, and further determines that when receiving downlink data on BWP2, it does not need to consider rate matching according to the SSB.

[0234] In an embodiment of the present invention, a terminal device receives first indication information sent by a network device. The first indication information is used to indicate the frequency-domain position of a synchronization signal block (SSB) and / or the coverage cell corresponding to the SSB. The terminal device can complete initial access and match the data rate of downlink reception according to the first indication information. Through the method of the embodiments of the present application, in an NTN system, terminal devices in different coverage cells on the ground can correctly complete the rate matching of initial access and downlink data reception in the NTN system. In addition, through the method of some embodiments of the present application, when the frequency reuse factor is greater than 1, for the same cell, terminal devices in different coverage cell regions on the ground can also access the cell through different bandwidth parts (BWPs) and correctly complete the rate matching of initial access and downlink data reception in the NTN system.

[0235] Correspondingly to the method of the above at least one embodiment applied to a terminal device, an embodiment of the present application further provides one or more terminal devices. The terminal device of the embodiment of the present application can implement any implementation manner of the above method. As Figure 6A shown, it is a schematic diagram of an embodiment of a terminal device in an embodiment of the present invention, which may include:

[0236] A receiving module 601, configured to receive first indication information sent by a network device, where the first indication information is used to indicate the frequency-domain position of a synchronization signal block (SSB) and / or the coverage cell corresponding to the SSB.

[0237] Optionally, as Figure 6B shown, it is a schematic diagram of another embodiment of a terminal device in an embodiment of the present invention. The terminal device further includes:

[0238] A processing module 602, configured to determine the frequency-domain position of the SSB and / or the coverage cell corresponding to the SSB according to the first indication information.

[0239] Optionally, the first indication information is used to indicate at least two frequency-domain positions of the SSB.

[0240] Optionally, the frequency-domain position of the SSB includes at least one of the following:

[0241] The number of the synchronization raster transmitted by the SSB;

[0242] The identification ID of the bandwidth part (BWP) transmitted by the SSB;

[0243] The frequency-domain position of the SSB in the BWP transmitted by the SSB;

[0244] The ID of the resource block (RB) set transmitted by the SSB; and

[0245] The frequency-domain position of the SSB in the RB set transmitted by the SSB.

[0246] Optionally, the frequency domain position of the SSB in the BWP for SSB transmission includes at least one of the following:

[0247] The RB number of the first RB for SSB transmission in the BWP;

[0248] The frequency domain offset between the first RB for SSB transmission and the first RB in the BWP;

[0249] The position of the synchronization raster for SSB transmission in the synchronization raster included in the BWP; and,

[0250] The synchronization raster number of the synchronization raster for SSB transmission in the synchronization raster included in the BWP.

[0251] Optionally, the coverage cell corresponding to the SSB includes at least one of the following:

[0252] The ID of the coverage cell corresponding to the SSB;

[0253] The association relationship between the coverage cell corresponding to the SSB and the BWP; and,

[0254] The association relationship between the ID of the coverage cell corresponding to the SSB and the ID of the BWP.

[0255] Optionally, the first indication information is used to indicate at least one of the following:

[0256] The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster for at least one SSB transmission;

[0257] The association relationship between the index of at least one SSB in the SSB and the ID of the BWP for at least one SSB transmission;

[0258] The association relationship between the index of at least one SSB in the SSB and the frequency domain position of at least one SSB in the BWP for at least one SSB transmission;

[0259] The association relationship between the index of at least one SSB in the SSB and the type of at least one SSB corresponding to the SSB, where the SSB type includes the SSB defining the cell and the SSB not defining the cell;

[0260] The association relationship between the index of at least one SSB in the SSB and the ID of the RB set for at least one SSB transmission;

[0261] The association relationship between the index of at least one SSB in the SSB and the frequency domain position of at least one SSB in the RB set for at least one SSB transmission;

[0262] The association relationship between the index of at least one SSB in the SSB and the ID of at least one coverage cell corresponding to the SSB;

[0263] The association relationship between the IDs of at least one covering cell and the IDs of at least one BWP, where at least one covering cell and at least one BWP correspond to the same SSB;

[0264] And, the association relationship between at least two of the following: the ID of at least one covering cell, the ID of at least one BWP, and at least one SSB index.

[0265] Optionally, the first indication information is used to determine that the SSB defining the cell is located at a frequency domain position; or, the first indication information is used to determine that at least two SSBs defining the cell are located at different frequency domain positions.

[0266] Optionally, the receiving module 601 is specifically configured to receive the first indication information sent by the network device through the physical broadcast channel PBCH, system message, or higher layer parameter.

[0267] Optionally, the system message includes at least one of the following: master information block MIB, system information block one SIB1, and other SIBs other than SIB1.

[0268] Optionally, the SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency domain position of the SSB, including: the first indication information is used to indicate the frequency domain position of at least one transmitted SSB in at least one transmission opportunity; or, the first indication information is used to indicate the frequency domain position of at least one untransmitted SSB in at least one transmission opportunity.

[0269] Optionally, the SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location QCL relationship.

[0270] Optionally, the first indication information is further used to indicate the time domain position of the SSB.

[0271] Optionally, the processing module 602 is further configured to determine the first SSB position of the SSB transmitted on the activated BWP according to the first indication information.

[0272] Optionally, the receiving module 601 is further configured to receive the first physical downlink shared channel PDSCH sent by the network device according to the first SSB position on the activated BWP;

[0273] The processing module 602 is further configured to determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission when the RBs included in the first SSB position overlap with the RBs included in the first PDSCH. The first PDSCH includes at least one of the following situations:

[0274] The physical downlink shared channel (PDSCH) scheduled by the physical downlink control channel (PDCCH) with cyclic redundancy check (CRC) scrambling for the system information radio network temporary identifier (SI-RNTI), and the system message indicated in the downlink control information (DCI) in the PDCCH is 1;

[0275] The PDSCH scheduled by the PDCCH with CRC scrambling for the SI-RNTI, and other system information blocks (SIBs) other than SIB1 are included in the PDSCH;

[0276] The PDSCH scheduled by the PDCCH with CRC scrambling for the random access radio network temporary identifier (RA-RNTI), the message B radio network temporary identifier (MsgB-RNTI), the paging radio network temporary identifier (P-RNTI), or the temporary cell radio network temporary identifier (TC-RNTI);

[0277] The PDSCH scheduled by the PDCCH with CRC scrambling for the cell radio network temporary identifier (C-RNTI), the modulation and coding scheme radio network temporary identifier (MCS-C-RNTI), or the configured scheduling radio network temporary identifier (CS-RNTI); and,

[0278] The semi-persistent scheduling (SPS) PDSCH.

[0279] Optionally, the receiving module 601 is further configured to, when the terminal device receives the first indication information sent by the network device through the physical broadcast channel (PBCH) or the master information block (MIB), and the terminal device receives the first PDSCH scheduled by the PDCCH with CRC scrambling for the SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives the first PDSCH scheduled by the PDCCH with CRC scrambling for the SI-RNTI and SIB1 is included in the first PDSCH, receive the first PDSCH according to the first synchronization signal block (SSB) position;

[0280] The processing module 602 is further configured to, when there is an overlap between the resource blocks (RBs) included in the first SSB position and the RBs included in the first PDSCH, determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission.

[0281] Optionally, the terminal device may further include: the processing module 602 is further configured to, when the terminal device receives the first PDSCH scheduled by the PDCCH with CRC scrambling for the SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives the first PDSCH scheduled by the PDCCH with CRC scrambling for the SI-RNTI and SIB1 is included in the first PDSCH, determine that there is no resource element (RE) in the resource elements included in the first PDSCH for SSB transmission.

[0282] Optionally, the first indication information is included in the first PDSCH.

[0283] Correspondingly to the method of at least one of the above embodiments applied to a network device, an embodiment of the present application further provides one or more network devices. The network device according to the embodiment of the present application can implement any implementation manner of the above method. As Figure 7 shown, it is a schematic diagram of an embodiment of a network device in an embodiment of the present invention, which may include:

[0284] A sending module 701, configured to send first indication information to a terminal device, where the first indication information is used to indicate the frequency domain position of a synchronization signal block SSB and / or the coverage cell corresponding to the SSB.

[0285] Optionally, the first indication information is used to indicate at least two frequency domain positions of the SSB.

[0286] Optionally, the frequency domain position of the SSB includes at least one of the following:

[0287] The number of the synchronization raster transmitted by the SSB;

[0288] The identification ID of the bandwidth part BWP transmitted by the SSB;

[0289] The frequency domain position of the SSB in the BWP transmitted by the SSB;

[0290] The ID of the resource block RB set transmitted by the SSB; and,

[0291] The frequency domain position of the SSB in the RB set transmitted by the SSB.

[0292] Optionally, the frequency domain position of the SSB in the BWP transmitted by the SSB includes at least one of the following:

[0293] The RB number of the first RB transmitted by the SSB in the BWP;

[0294] The frequency domain offset between the first RB transmitted by the SSB and the first RB in the BWP;

[0295] The position of the synchronization raster transmitted by the SSB in the synchronization rasters included in the BWP; and,

[0296] The synchronization raster number of the synchronization raster transmitted by the SSB in the synchronization rasters included in the BWP.

[0297] Optionally, the coverage cell corresponding to the SSB includes at least one of the following:

[0298] The ID of the coverage cell corresponding to the SSB;

[0299] The association relationship between the coverage cell corresponding to the SSB and the BWP; and,

[0300] The association relationship between the ID of the covered cell corresponding to the SSB and the ID of the BWP.

[0301] Optionally, the first indication information is used to indicate at least one of the following:

[0302] The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster transmitted by at least one SSB;

[0303] The association relationship between the index of at least one SSB in the SSB and the ID of the BWP transmitted by at least one SSB;

[0304] The association relationship between the index of at least one SSB in the SSB and the frequency domain position of at least one SSB in the BWP transmitted by at least one SSB;

[0305] The association relationship between the index of at least one SSB in the SSB and the type of SSB corresponding to at least one SSB, where the SSB type includes the SSB that defines the cell and the SSB that does not define the cell;

[0306] The association relationship between the index of at least one SSB in the SSB and the ID of the RB set transmitted by at least one SSB;

[0307] The association relationship between the index of at least one SSB in the SSB and the frequency domain position of at least one SSB in the RB set transmitted by at least one SSB;

[0308] The association relationship between the index of at least one SSB in the SSB and the ID of at least one covered cell corresponding to at least one SSB;

[0309] The association relationship between the ID of at least one covered cell and the ID of at least one BWP, where at least one covered cell and at least one BWP correspond to the same SSB;

[0310] And, the association relationship between at least two of the following: the ID of at least one covered cell, the ID of at least one BWP, and at least one SSB index.

[0311] Optionally, the first indication information is used to determine that the SSB that defines the cell is located at a frequency domain position; or, the first indication information is used to determine that at least two SSBs that define the cell are located at different frequency domain positions.

[0312] Optionally, the sending module 701 is specifically configured to send the first indication information to the terminal device through the physical broadcast channel PBCH, system message, or high-layer parameter.

[0313] Optionally, the system message includes at least one of the following: master message block MIB, system message block one SIB1, and other SIBs other than SIB1.

[0314] Optionally, the SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency-domain position of the SSB, including: the first indication information is used to indicate the frequency-domain position of at least one transmitted SSB in at least one transmission opportunity; or, the first indication information is used to indicate the frequency-domain position of at least one untransmitted SSB in at least one transmission opportunity.

[0315] Optionally, the SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location (QCL) relationship.

[0316] Optionally, the first indication information is further used to indicate the time-domain position of the SSB.

[0317] Optionally, the first indication information is further used for the terminal device to determine the first SSB position of the SSB transmitted on the activated BWP.

[0318] Optionally, the sending module 701 is further configured to send a first physical downlink shared channel (PDSCH) on the activated BWP according to the first SSB position. Wherein, when there is an overlap between the resource blocks (RBs) included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission. The first PDSCH includes at least one of the following cases:

[0319] The PDSCH scheduled by a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambling code of a system information radio network temporary identifier (SI-RNTI), and the system message indicated in the downlink control information (DCI) in the PDCCH is 1;

[0320] The PDSCH scheduled by a PDCCH with a CRC scrambling code of an SI-RNTI, and the PDSCH includes other system information blocks (SIBs) other than SIB1;

[0321] The PDSCH scheduled by a PDCCH with a CRC scrambling code of a random access radio network temporary identifier (RA-RNTI), a MsgB-RNTI, a paging radio network temporary identifier (P-RNTI), or a temporary cell radio network temporary identifier (TC-RNTI);

[0322] The PDSCH scheduled by a PDCCH with a CRC scrambling code of a cell radio network temporary identifier (C-RNTI), a modulation and coding scheme radio network temporary identifier (MCS-C-RNTI), or a configured scheduling radio network temporary identifier (CS-RNTI); and

[0323] A semi-persistent scheduling (SPS) PDSCH.

[0324] Correspondingly to the method of the above at least one embodiment applied to a terminal device, an embodiment of the present application further provides one or more terminal devices. The terminal device of the embodiment of the present application can implement any implementation manner of the above method. As Figure 8 shown, it is a schematic diagram of another embodiment of the terminal device in the embodiment of the present invention. Taking a mobile phone as an example, the terminal device may include: a radio frequency (RF) circuit 810, a memory 820, an input unit 830, a display unit 840, a sensor 850, an audio circuit 860, a wireless fidelity (WiFi) module 870, a processor 880, and a power supply 890, etc. Among them, the RF circuit 810 includes a receiver 814 and a transmitter 812. Those skilled in the art can understand that Figure 8 the mobile phone structure shown in

[0325] does not constitute a limitation on the mobile phone, and may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements. Figure 8 The following specifically introduces each component of the mobile phone:

[0326] The RF circuit 810 can be used for receiving and sending signals during information reception or call processes. Specifically, after receiving the downlink information of the base station, it is given to the processor 880 for processing; in addition, the designed uplink data is sent to the base station. Generally, the RF circuit 810 includes but is not limited to antennas, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the RF circuit 810 can also communicate with the network and other devices through wireless communication. The above wireless communication can use any communication standard or protocol, including but not limited to the global system of mobile communication (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), long term evolution (LTE), email, short messaging service (SMS), etc.

[0327] The memory 820 can be used to store software programs and modules. The processor 880 executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory 820. The memory 820 may mainly include a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, phone book, etc.). In addition, the memory 820 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0328] The input unit 830 can be used to receive input digital or character information and generate key signal inputs related to the user settings and function controls of the mobile phone. Specifically, the input unit 830 may include a touch panel 831 and other input devices 832. The touch panel 831, also known as a touch screen, can collect touch operations of the user on or near it (such as operations of the user using a finger, a stylus, or any suitable object or accessory on or near the touch panel 831), and drive the corresponding connection device according to a pre-set program. Optionally, the touch panel 831 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the touch position of the user and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the processor 880, and can receive and execute commands sent by the processor 880. In addition, various types such as resistive, capacitive, infrared, and surface acoustic wave can be used to implement the touch panel 831. In addition to the touch panel 831, the input unit 830 may also include other input devices 832. Specifically, the other input devices 832 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power on / off keys, etc.), a trackball, a mouse, a joystick, etc.

[0329] The display unit 840 can be used to display information input by the user or information provided to the user, as well as various menus of the mobile phone. The display unit 840 may include a display panel 841. Optionally, the display panel 841 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc. Further, the touch panel 831 can cover the display panel 841. When the touch panel 831 detects a touch operation on or near it, it is transmitted to the processor 880 to determine the type of touch event. Subsequently, the processor 880 provides a corresponding visual output on the display panel 841 according to the type of touch event. Although in Figure 8 , the touch panel 831 and the display panel 841 are implemented as two independent components to realize the input and input functions of the mobile phone, but in some embodiments, the touch panel 831 and the display panel 841 can be integrated to realize the input and output functions of the mobile phone.

[0330] The mobile phone may further include at least one sensor 850, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor. Among them, the ambient light sensor can adjust the brightness of the display panel 841 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 841 and / or the backlight when the mobile phone is moved to the ear. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes). When stationary, it can detect the magnitude and direction of gravity, and can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; As for other sensors such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors that the mobile phone can also be configured with, they will not be elaborated here.

[0331] The audio circuit 860, the speaker 861, and the microphone 862 can provide an audio interface between the user and the mobile phone. The audio circuit 860 can transmit the electrical signal converted from the received audio data to the speaker 861, and the speaker 861 converts it into a sound signal for output; on the other hand, the microphone 862 converts the collected sound signal into an electrical signal, which is received by the audio circuit 860 and then converted into audio data. After the audio data is output to the processor 880 for processing, it is sent to another mobile phone, for example, through the RF circuit 810, or the audio data is output to the memory 820 for further processing.

[0332] WiFi belongs to short-range wireless transmission technology. The mobile phone can help users send and receive emails, browse the web, and access streaming media through the WiFi module 870. It provides users with wireless broadband Internet access. Although Figure 8The WiFi module 870 is shown, but it can be understood that it does not belong to the essential components of the mobile phone and can be omitted entirely within the scope of not changing the essence of the invention as needed.

[0333] The processor 880 is the control center of the mobile phone, connecting various parts of the entire mobile phone through various interfaces and circuits. By running or executing software programs and / or modules stored in the memory 820, and by calling data stored in the memory 820, it executes various functions of the mobile phone and processes data, thereby monitoring the mobile phone as a whole. Optionally, the processor 880 may include one or more processing units; preferably, the processor 880 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communications. It can be understood that the above-mentioned modem processor may not be integrated into the processor 880 either.

[0334] The mobile phone also includes a power supply 890 (such as a battery) for powering each component. Preferably, the power supply can be logically connected to the processor 880 through a power management system, thereby realizing functions such as management of charging, discharging, and power consumption management through the power management system. Although not shown, the mobile phone may also include a camera, a Bluetooth module, etc., which will not be elaborated here.

[0335] It should be noted that in the embodiment of the present invention, the RF circuit 810 is used to receive the first indication information sent by the network device, and the first indication information is used to indicate the frequency domain position of the synchronization signal block SSB, and / or, the coverage cell corresponding to the SSB.

[0336] Optionally, the processor 880 is used to determine the frequency domain position of the SSB, and / or, the coverage cell corresponding to the SSB according to the first indication information.

[0337] Optionally, the first indication information is used to indicate at least two frequency domain positions of the SSB.

[0338] Optionally, the frequency domain position of the SSB includes at least one of the following:

[0339] The number of the synchronization grid transmitted by the SSB;

[0340] The identification ID of the bandwidth part BWP transmitted by the SSB;

[0341] The frequency domain position of the SSB in the BWP transmitted by the SSB;

[0342] The ID of the resource block RB set transmitted by the SSB; and,

[0343] The frequency domain position of the SSB in the RB set transmitted by the SSB.

[0344] Optionally, the frequency-domain position of the SSB in the BWP for SSB transmission includes at least one of the following:

[0345] The RB number of the first RB for SSB transmission in the BWP;

[0346] The frequency-domain offset between the first RB for SSB transmission and the first RB in the BWP;

[0347] The position of the synchronization raster for SSB transmission in the synchronization raster included in the BWP; and,

[0348] The synchronization raster number of the synchronization raster for SSB transmission in the synchronization raster included in the BWP.

[0349] Optionally, the coverage cell corresponding to the SSB includes at least one of the following:

[0350] The ID of the coverage cell corresponding to the SSB;

[0351] The association relationship between the coverage cell corresponding to the SSB and the BWP; and,

[0352] The association relationship between the ID of the coverage cell corresponding to the SSB and the ID of the BWP.

[0353] Optionally, the first indication information is used to indicate at least one of the following:

[0354] The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster for transmission of at least one SSB;

[0355] The association relationship between the index of at least one SSB in the SSB and the ID of the BWP for transmission of at least one SSB;

[0356] The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of at least one SSB in the BWP for transmission of at least one SSB;

[0357] The association relationship between the index of at least one SSB in the SSB and the type of at least one SSB corresponding to the SSB, where the SSB type includes the SSB defining the cell and the SSB not defining the cell;

[0358] The association relationship between the index of at least one SSB in the SSB and the ID of the RB set for transmission of at least one SSB;

[0359] The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of at least one SSB in the RB set for transmission of at least one SSB;

[0360] The association relationship between the index of at least one SSB in the SSB and the ID of at least one coverage cell corresponding to the SSB;

[0361] The association relationship between the ID of at least one covering cell and the ID of at least one BWP, where at least one covering cell and at least one BWP correspond to the same SSB;

[0362] And the association relationship between at least two of the following: the ID of at least one covering cell, the ID of at least one BWP, and at least one SSB index.

[0363] Optionally, the first indication information is used to determine that the SSB defining the cell is located at a frequency domain position; or, the first indication information is used to determine that at least two SSBs defining the cell are located at different frequency domain positions.

[0364] Optionally, the RF circuit 810 is specifically configured to receive the first indication information sent by the network device through the physical broadcast channel PBCH, system message, or high-layer parameter.

[0365] Optionally, the system message includes at least one of the following: master information block MIB, system information block one SIB1, and other SIBs other than SIB1.

[0366] Optionally, the SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency domain position of the SSB, including: the first indication information is used to indicate the frequency domain position of at least one transmitted SSB in at least one transmission opportunity; or, the first indication information is used to indicate the frequency domain position of at least one non-transmitted SSB in at least one transmission opportunity.

[0367] Optionally, the SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location QCL relationship.

[0368] Optionally, the first indication information is further used to indicate the time domain position of the SSB.

[0369] Optionally, the processor 880 is further configured to determine the first SSB position of the SSB transmitted on the activated BWP according to the first indication information.

[0370] Optionally, the RF circuit 810 is further configured to receive the first physical downlink shared channel PDSCH sent by the network device on the activated BWP according to the first SSB position;

[0371] The processor 880 is further configured to, when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission, and the first PDSCH includes at least one of the following situations:

[0372] The cyclic redundancy check (CRC) scrambling is for the physical downlink shared channel (PDSCH) scheduled by the physical downlink control channel (PDCCH) with the system information radio network temporary identifier (SI-RNTI), and the system message indicated in the downlink control information (DCI) in the PDCCH is 1;

[0373] The CRC scrambling is for the PDSCH scheduled by the PDCCH with the SI-RNTI, and the PDSCH includes other system information blocks (SIBs) other than SIB1;

[0374] The CRC scrambling is for the PDSCH scheduled by the PDCCH with the random access radio network temporary identifier (RA-RNTI), MsgB-RNTI, paging radio network temporary identifier (P-RNTI), or temporary cell radio network temporary identifier (TC-RNTI);

[0375] The CRC scrambling is for the PDSCH scheduled by the PDCCH with the cell radio network temporary identifier (C-RNTI), modulation and coding scheme radio network temporary identifier (MCS-C-RNTI), or configured scheduling radio network temporary identifier (CS-RNTI); and,

[0376] The semi-persistent scheduling (SPS) PDSCH.

[0377] Optionally, the RF circuit 810 is further configured to, when the terminal device receives the first indication information sent by the network device through the physical broadcast channel (PBCH) or the master information block (MIB), and the terminal device receives the first PDSCH scheduled by the PDCCH with the SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives the first PDSCH scheduled by the PDCCH with the SI-RNTI and the first PDSCH includes SIB1, receive the first PDSCH according to the first synchronization signal block (SSB) position;

[0378] The processor 880 is further configured to, when there is an overlap between the resource blocks (RBs) included in the first SSB position and the RBs included in the first PDSCH, determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission.

[0379] Optionally, the processor 880 is further configured to, when the terminal device receives the first PDSCH scheduled by the PDCCH with the SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives the first PDSCH scheduled by the PDCCH with the SI-RNTI and the first PDSCH includes SIB1, determine that there is no resource element (RE) in the REs included in the first PDSCH for the SSB transmission.

[0380] Optionally, the first indication information is included in the first PDSCH.

[0381] Correspondingly to the method of the above at least one embodiment applied to a network device, an embodiment of the present application further provides one or more network devices. The network device of the embodiment of the present application can implement any implementation manner of the above method. As Figure 9 shown, it is a schematic diagram of another embodiment of the network device in the embodiment of the present invention, and may include:

[0382] a memory 901 and a transmitter 902, where the memory 901 is used for executable program code;

[0383] The transmitter 902 is configured to send first indication information to a terminal device, where the first indication information is used to indicate the frequency domain position of a synchronization signal block SSB and / or the coverage cell corresponding to the SSB.

[0384] Optionally, the first indication information is used to indicate at least two frequency domain positions of the SSB.

[0385] Optionally, the frequency domain position of the SSB includes at least one of the following:

[0386] The number of the synchronization raster transmitted by the SSB;

[0387] The identification ID of the bandwidth part BWP transmitted by the SSB;

[0388] The frequency domain position of the SSB in the BWP transmitted by the SSB;

[0389] The ID of the resource block RB set transmitted by the SSB; and,

[0390] The frequency domain position of the SSB in the RB set transmitted by the SSB.

[0391] Optionally, the frequency domain position of the SSB in the BWP transmitted by the SSB includes at least one of the following:

[0392] The RB number of the first RB transmitted by the SSB in the BWP;

[0393] The frequency domain offset between the first RB transmitted by the SSB and the first RB in the BWP;

[0394] The position of the synchronization raster transmitted by the SSB in the synchronization rasters included in the BWP; and,

[0395] The synchronization raster number of the synchronization raster transmitted by the SSB in the synchronization rasters included in the BWP.

[0396] Optionally, the coverage cell corresponding to the SSB includes at least one of the following:

[0397] The ID of the coverage cell corresponding to the SSB;

[0398] The association relationship between the coverage cell corresponding to the SSB and the BWP; and,

[0399] The association relationship between the ID of the covered cell corresponding to the SSB and the ID of the BWP.

[0400] Optionally, the first indication information is used to indicate at least one of the following:

[0401] The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster transmitted by at least one SSB;

[0402] The association relationship between the index of at least one SSB in the SSB and the ID of the BWP transmitted by at least one SSB;

[0403] The association relationship between the index of at least one SSB in the SSB and the frequency domain position of at least one SSB in the BWP transmitted by at least one SSB;

[0404] The association relationship between the index of at least one SSB in the SSB and the SSB type corresponding to at least one SSB, where the SSB type includes the SSB that defines the cell and the SSB that does not define the cell;

[0405] The association relationship between the index of at least one SSB in the SSB and the ID of the RB set transmitted by at least one SSB;

[0406] The association relationship between the index of at least one SSB in the SSB and the frequency domain position of at least one SSB in the RB set transmitted by at least one SSB;

[0407] The association relationship between the index of at least one SSB in the SSB and the ID of at least one covered cell corresponding to at least one SSB;

[0408] The association relationship between the ID of at least one covered cell and the ID of at least one BWP, where at least one covered cell and at least one BWP correspond to the same SSB;

[0409] And, the association relationship between at least two of the following: the ID of at least one covered cell, the ID of at least one BWP, and at least one SSB index.

[0410] Optionally, the first indication information is used to determine that the SSB that defines the cell is located at a frequency domain position; or, the first indication information is used to determine that at least two SSBs that define the cell are located at different frequency domain positions.

[0411] Optionally, the transmitter 902 is specifically configured to send the first indication information to the terminal device through the physical broadcast channel PBCH, system message, or high-layer parameter.

[0412] Optionally, the system message includes at least one of the following: master message block MIB, system message block one SIB1, and other SIBs other than SIB1.

[0413] Optionally, the SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency-domain position of the SSB, including: the first indication information is used to indicate the frequency-domain position of at least one transmitted SSB in at least one transmission opportunity; or, the first indication information is used to indicate the frequency-domain position of at least one untransmitted SSB in at least one transmission opportunity.

[0414] Optionally, the SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location (QCL) relationship.

[0415] Optionally, the first indication information is further used to indicate the time-domain position of the SSB.

[0416] Optionally, the first indication information is further used for the terminal device to determine the first SSB position of the SSB transmitted on the activated BWP.

[0417] Optionally, the transmitter 902 is further configured to transmit a first physical downlink shared channel (PDSCH) on the activated BWP according to the first SSB position. When there is an overlap between the resource blocks (RBs) included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the transmission of the first PDSCH. The first PDSCH includes at least one of the following cases:

[0418] The PDSCH scheduled by a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambling code of a system information radio network temporary identifier (SI-RNTI) and the system message indicated in the downlink control information (DCI) in the PDCCH is 1;

[0419] The PDSCH scheduled by a PDCCH with a CRC scrambling code of an SI-RNTI and the PDSCH includes other system information blocks (SIBs) other than SIB1;

[0420] The PDSCH scheduled by a PDCCH with a CRC scrambling code of a random access radio network temporary identifier (RA-RNTI), a MsgB-RNTI, a paging radio network temporary identifier (P-RNTI), or a temporary cell radio network temporary identifier (TC-RNTI);

[0421] The PDSCH scheduled by a PDCCH with a CRC scrambling code of a cell radio network temporary identifier (C-RNTI), a modulation and coding scheme radio network temporary identifier (MCS-C-RNTI), or a configured scheduling radio network temporary identifier (CS-RNTI); and

[0422] A semi-persistent scheduling (SPS) PDSCH.

[0423] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from a website, computer, server, or data center to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

[0424] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims, and drawings of the present invention are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order different from that shown or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

Claims

1. A wireless communication method, characterized in that, Applied to the non-terrestrial communication network device NTN scenario, a satellite serves multiple covered cells through multiple beams. Among them, the multiple covered cells correspond to the same cell identifier. The method includes: The terminal device receives first indication information sent by the network device. The first indication information is used to indicate the frequency-domain position of the synchronization signal block SSB and / or the covered cell corresponding to the SSB. The terminal device determines the frequency-domain position of the SSB and / or the covered cell corresponding to the SSB according to the first indication information. The first indication information is used to indicate at least two frequency-domain positions of the SSB. The first indication information indicates the association relationship between the identifier ID of the bandwidth part BWP and the SSB index transmitted in the SSB transmission opportunity in the BWP. The frequency-domain position of the SSB includes: The frequency-domain position of the SSB in the BWP where the SSB is transmitted. The frequency-domain position of the SSB in the BWP where the SSB is transmitted includes at least one of the following: the RB number of the first RB transmitted by the SSB in the BWP; the frequency-domain offset between the first RB transmitted by the SSB and the first RB in the BWP; the position of the synchronization grid transmitted by the SSB in the synchronization grids included in the BWP; and the synchronization grid number of the synchronization grid transmitted by the SSB in the synchronization grids included in the BWP.

2. The method according to claim 1, characterized in that The frequency-domain position of the SSB further includes at least one of the following: The number of the synchronization grid transmitted by the SSB; The identifier ID of the bandwidth part BWP transmitted by the SSB; The ID of the resource block RB set transmitted by the SSB; and The frequency-domain position of the SSB in the RB set transmitted by the SSB.

3. The method according to any one of claims 1 to 2, characterized in that, The covered cell corresponding to the SSB includes at least one of the following: The ID of the covered cell corresponding to the SSB; The association relationship between the covered cell corresponding to the SSB and the BWP; And The association relationship between the ID of the covered cell corresponding to the SSB and the ID of the BWP.

4. The method according to any one of claims 1 to 3, characterized in that, The first indication information is used to indicate at least one of the following: The association relationship between the index of at least one SSB in the SSB and the number of the synchronization grid transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the SSB type corresponding to the at least one SSB, where the SSB type includes the SSB that defines the cell and the SSB that does not define the cell; The association relationship between the index of at least one SSB in the SSB and the ID of the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSBs and the ID of at least one covered cell corresponding to the at least one SSB; The association relationship between the ID of at least one covered cell and the ID of at least one BWP, where the at least one covered cell and the at least one BWP correspond to the same SSB; And, the association relationship between at least two of the following: the ID of at least one covered cell, the ID of at least one BWP, and at least one SSB index.

5. The method according to any one of claims 1 to 4, characterized in that, The first indication information is used to determine that the SSB defining the cell is located at one frequency domain position; or, The first indication information is used to determine that at least two SSBs of the defined cell are located at different frequency domain positions.

6. The method according to any one of claims 1 to 5, characterized in that The terminal device receives the first indication information sent by the network device, including: The terminal device receives the first indication information sent by the network device through the physical broadcast channel PBCH, system message or high-layer parameter.

7. The method according to claim 6, characterized in that, The system message includes at least one of the following: Master information block MIB, system information block one SIB1, other SIBs other than SIB1.

8. The method according to any one of claims 1 to 7, characterized in that, The SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency domain position of the SSB, including: The first indication information is used to indicate the frequency domain position of at least one transmitted SSB in the at least one transmission opportunity; or, The first indication information is used to indicate the frequency domain position of at least one untransmitted SSB in the at least one transmission opportunity.

9. The method according to any one of claims 1 to 8, characterized in that The SSBs with the same SSB index transmitted in the SSB have the same quasi co-location QCL relationship.

10. The method according to any one of claims 1 to 9, characterized in that, The first indication information is further used to indicate the time domain position of the SSB.

11. The method according to any one of claims 1 to 10, characterized in that, The method further includes: The terminal device determines the first SSB position of the SSB transmitted on the activated BWP according to the first indication information.

12. The method according to claim 11, wherein The method further includes: The terminal device receives the first physical downlink shared channel PDSCH sent by the network device on the activated BWP according to the first SSB position; When there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission, and the first PDSCH includes at least one of the following situations: The PDSCH scheduled by the physical downlink control channel PDCCH with the cyclic redundancy coding CRC scrambling code being SI-RNTI and the system message indicated in the physical downlink control channel DCI in the PDCCH is 1; The PDSCH scheduled by the PDCCH with the CRC scrambling code being the system information radio network device temporary identity SI-RNTI and the other SIBs other than SIB1 are included in the PDSCH; The PDSCH scheduled by the PDCCH with the CRC scrambling code being the random access radio network device temporary identity RA-RNTI, MsgB-RNTI, paging radio network device temporary identity P-RNTI or temporary cell radio network device temporary identity TC-RNTI; The PDSCH scheduled by the PDCCH with a CRC scrambling code being the Cell Radio Network Temporary Identifier C-RNTI, the Modulation and Coding Scheme Cell Radio Network Temporary Identifier MCS-C-RNTI, or the Configured Scheduling Cell Radio Network Temporary Identifier CS-RNTI; and, The Semi-Persistent Scheduling SPS PDSCH.

13. The method according to claim 11, wherein The method further includes: When the terminal device receives the first indication information sent by the network device through the PBCH or the MIB, the terminal device receives the first PDSCH scheduled by the PDCCH with a CRC scrambling code being the SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or, when the terminal device receives the first PDSCH scheduled by the PDCCH with a CRC scrambling code being the SI-RNTI and the first PDSCH includes SIB1, the terminal device receives the first PDSCH according to the first SSB position; When there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission.

14. The method according to any one of claims 1 to 10, characterized in that, The method further includes: When the terminal device receives the first PDSCH scheduled by the PDCCH with a CRC scrambling code being the SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or, when the terminal device receives the first PDSCH scheduled by the PDCCH with a CRC scrambling code being the SI-RNTI and the first PDSCH includes SIB1, the terminal device determines that there is no RE in the resource element REs included in the first PDSCH for SSB transmission.

15. The method according to claim 14, wherein The first indication information is included in the first PDSCH.

16. A wireless communication method, characterized in that, Applied to the Non-Terrestrial Network Equipment NTN scenario, a satellite serves multiple covered cells through multiple beams, where the multiple covered cells correspond to the same cell identifier. The method includes: The network device sends first indication information to the terminal device, and the first indication information is used to indicate the frequency-domain position of the Synchronization Signal Block SSB, and / or, the covered cell corresponding to the SSB; The terminal device determines the frequency-domain position of the SSB, and / or, the covered cell corresponding to the SSB according to the first indication information; The first indication information is used to indicate at least two frequency-domain positions of the SSB; the first indication information indicates the association relationship between the identifier ID of the Bandwidth Part BWP and the SSB index transmitted in the SSB transmission opportunity in the BWP; The frequency-domain position of the SSB includes: The frequency-domain position of the SSB in the BWP for which the SSB is transmitted, and the frequency-domain position of the SSB in the BWP for which the SSB is transmitted includes at least one of the following: the RB number of the first RB for which the SSB is transmitted in the BWP; the frequency-domain offset between the first RB for which the SSB is transmitted and the first RB in the BWP; the position of the synchronization raster for which the SSB is transmitted in the synchronization raster included in the BWP; and the synchronization raster number of the synchronization raster for which the SSB is transmitted in the synchronization raster included in the BWP.

17. The method according to claim 16, wherein The frequency-domain position of the SSB includes at least one of the following: The number of the synchronization raster for which the SSB is transmitted; The identification ID of the bandwidth part BWP for which the SSB is transmitted; The ID of the resource block RB set for which the SSB is transmitted; and, The frequency-domain position of the SSB in the RB set for which the SSB is transmitted.

18. The method according to claim 16 or 17, characterized in that, The coverage cell corresponding to the SSB includes at least one of the following: The ID of the coverage cell corresponding to the SSB; The association relationship between the coverage cell corresponding to the SSB and the BWP; And, The association relationship between the ID of the coverage cell corresponding to the SSB and the ID of the BWP.

19. The method according to any one of claims 16 - 18, characterized in that, The first indication information is used to indicate at least one of the following: The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster for which the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the ID of the BWP for which the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the BWP for which the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the type of SSB corresponding to the at least one SSB, where the type of SSB includes the SSB that defines a cell and the SSB that does not define a cell; The association relationship between the index of at least one SSB in the SSB and the ID of the RB set for which the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the RB set for which the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the ID of at least one coverage cell corresponding to the at least one SSB; The association relationship between the ID of at least one coverage cell and the ID of at least one BWP, where the at least one coverage cell and the at least one BWP correspond to the same SSB; And, the association relationship between at least two of the following: the ID of at least one coverage cell, the ID of at least one BWP, and at least one SSB index.

20. The method according to any one of claims 16 - 19, characterized in that, The first indication information is used to determine that the SSB that defines a cell is located at a frequency-domain position; or, The first indication information is used to determine that at least two SSBs of the cell-defining SSB are located at different frequency-domain positions.

21. The method according to any one of claims 16 - 20, characterized in that, The network device sends the first indication information to the terminal device, including: The network device sends the first indication information to the terminal device through the physical broadcast channel PBCH, system message, or high-layer parameter.

22. The method according to claim 21, wherein The system message includes at least one of the following: Master Information Block MIB, System Information Block 1 SIB1, and other SIBs other than SIB1.

23. The method according to any one of claims 16-22, characterized in that, The SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency-domain position of the SSB, including: The first indication information is used to indicate the frequency-domain position of at least one transmitted SSB in the at least one transmission opportunity; or, The first indication information is used to indicate the frequency-domain position of at least one untransmitted SSB in the at least one transmission opportunity.

24. The method according to any one of claims 16-23, characterized in that, The SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location QCL relationship.

25. The method according to any one of claims 16 - 24, characterized in that, The first indication information is further used to indicate the time-domain position of the SSB.

26. The method according to any one of claims 16 - 25, characterized in that The first indication information is further used for the terminal device to determine the first SSB position of the SSB transmitted on the activated BWP.

27. The method according to claim 26, wherein The method further includes: The network device sends a first Physical Downlink Shared Channel PDSCH on the activated BWP according to the first SSB position. Wherein, when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission. The first PDSCH includes at least one of the following situations: The PDSCH scheduled by a Physical Downlink Control Channel PDCCH with a Cyclic Redundancy Check CRC scrambling code of SI-RNTI and the system message indicated in the Physical Downlink Control Information DCI in the PDCCH is 1; The PDSCH scheduled by a PDCCH with a CRC scrambling code of System Information Radio Network Temporary Identity SI-RNTI and the PDSCH includes other SIBs other than SIB1; The PDSCH scheduled by a PDCCH with a CRC scrambling code of Random Access Radio Network Temporary Identity RA-RNTI, MsgB-RNTI, Paging Radio Network Temporary Identity P-RNTI, or Temporary Cell Radio Network Temporary Identity TC-RNTI; The PDSCH scheduled by a PDCCH with a CRC scrambling code of Cell Radio Network Temporary Identity C-RNTI, Modulation and Coding Scheme Radio Network Temporary Identity MCS-C-RNTI, or Configured Scheduling Radio Network Temporary Identity CS-RNTI; and, Semi-Persistent Scheduling SPS PDSCH.

28. A terminal device, characterized in that, Applied to the Non-Terrestrial Network Equipment NTN scenario, a satellite serves multiple covered cells through multiple beams. Wherein, the multiple covered cells correspond to the same cell identifier, and the terminal device includes: A receiving module, configured to receive first indication information sent by a network device, where the first indication information is used to indicate the frequency-domain position of a Synchronization Signal Block SSB, and / or the covered cell corresponding to the SSB; A processing module, configured to determine the frequency-domain position of the SSB, and / or the covered cell corresponding to the SSB according to the first indication information; The first indication information is used to indicate at least two frequency-domain positions of the SSB; the first indication information indicates the association relationship between the identification ID of the bandwidth part BWP and the SSB index transmitted in the SSB transmission opportunity in the BWP; The frequency-domain positions of the SSB include: The frequency-domain position of the SSB in the BWP where the SSB is transmitted, and the frequency-domain position of the SSB in the BWP where the SSB is transmitted includes at least one of the following: the RB number of the first RB transmitted by the SSB in the BWP; the frequency-domain offset between the first RB transmitted by the SSB and the first RB in the BWP; the position of the synchronization raster transmitted by the SSB in the synchronization raster included in the BWP; and the synchronization raster number of the synchronization raster transmitted by the SSB in the synchronization raster included in the BWP.

29. The terminal device according to claim 28, wherein The frequency-domain positions of the SSB include at least one of the following: The number of the synchronization raster transmitted by the SSB; The identification ID of the bandwidth part BWP transmitted by the SSB; The ID of the resource block RB set transmitted by the SSB; and, The frequency-domain position of the SSB in the RB set transmitted by the SSB.

30. The terminal device according to claim 28 or 29, characterized in that, The coverage cell corresponding to the SSB includes at least one of the following: The ID of the coverage cell corresponding to the SSB; The association relationship between the coverage cell corresponding to the SSB and the BWP; And, The association relationship between the ID of the coverage cell corresponding to the SSB and the ID of the BWP.

31. The terminal device according to any one of claims 28 to 30, characterized in that, The first indication information is used to indicate at least one of the following: The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the SSB type corresponding to the at least one SSB, where the SSB type includes the SSB that defines the cell and the SSB that does not define the cell; The association relationship between the index of at least one SSB in the SSB and the ID of the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of at least one coverage cell corresponding to the at least one SSB; The association relationship between the ID of at least one coverage cell and the ID of at least one BWP, where the at least one coverage cell corresponds to the same SSB as the at least one BWP; And, the association relationship between at least two of the following: the ID of at least one coverage cell, the ID of at least one BWP, and at least one SSB index.

32. The terminal device according to any one of claims 28 to 31, characterized in that The first indication information is used to determine that the SSB that defines the cell is located at a frequency-domain position; or, The first indication information is used to determine that at least two SSBs of the defined cell are located at different frequency domain positions.

33. The terminal device according to any one of claims 28 to 32, wherein The receiving module is specifically configured to receive the first indication information sent by the network device through a physical broadcast channel PBCH, system message or higher layer parameter.

34. The terminal device according to claim 33, wherein The system message includes at least one of the following: Master information block MIB, system information block one SIB1, other SIBs other than SIB1.

35. The terminal device according to any one of claims 28 to 34, characterized in that, The SSB includes SSBs in at least one transmission opportunity, and the first indication information is used to indicate the frequency domain position of the SSB, including: The first indication information is used to indicate the frequency domain position of at least one transmitted SSB in the at least one transmission opportunity; or, The first indication information is used to indicate the frequency domain position of at least one untransmitted SSB in the at least one transmission opportunity.

36. The terminal device according to any one of claims 28 to 35, characterized in that, SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location QCL relationship.

37. The terminal device according to any one of claims 28 to 36, characterized in that, The first indication information is further used to indicate the time domain position of the SSB.

38. The terminal device according to any one of claims 28 to 37, wherein The processing module is further configured to determine a first SSB position of the SSB transmitted on the activated BWP according to the first indication information.

39. The terminal device according to claim 38, wherein The receiving module is further configured to receive a first physical downlink shared channel PDSCH sent by the network device on the activated BWP according to the first SSB position; The processing module is further configured to, when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission. The first PDSCH includes at least one of the following cases: PDSCH scheduled by a physical downlink control channel PDCCH with a cyclic redundancy code CRC scrambling code of SI-RNTI and the system message indicated in the physical downlink control channel DCI in the PDCCH is 1; PDSCH scheduled by a PDCCH with a CRC scrambling code of a system information radio network device temporary identity SI-RNTI and the PDSCH includes other SIBs other than SIB1; PDSCH scheduled by a PDCCH with a CRC scrambling code of a random access radio network device temporary identity RA-RNTI, MsgB-RNTI, paging radio network device temporary identity P-RNTI or temporary cell radio network device temporary identity TC-RNTI; PDSCH scheduled by a PDCCH with a CRC scrambling code of a cell radio network device temporary identity C-RNTI, modulation and coding scheme radio network device temporary identity MCS-C-RNTI or configured scheduling radio network device temporary identity CS-RNTI; and, Semi-persistent scheduling SPS PDSCH.

40. The terminal device according to claim 38, wherein The receiving module is further configured to, when the terminal device receives the first indication information sent by the network device through the PBCH or MIB, and the terminal device receives the first PDSCH scheduled by the PDCCH with the CRC scrambling code being SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives the first PDSCH scheduled by the PDCCH with the CRC scrambling code being SI-RNTI and the first PDSCH includes SIB1, receive the first PDSCH according to the first SSB position; The processing module is further configured to, when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission.

41. The terminal device according to any one of claims 28 to 37, characterized in that, The terminal device further includes: The processing module is further configured to, when the terminal device receives the first PDSCH scheduled by the PDCCH with the CRC scrambling code being SI-RNTI and the system message indicated in the DCI in the PDCCH is 0, or when the terminal device receives the first PDSCH scheduled by the PDCCH with the CRC scrambling code being SI-RNTI and the first PDSCH includes SIB1, determine that there is no RE in the resource element REs included in the first PDSCH for SSB transmission.

42. The terminal device according to claim 41, characterized in that, The first indication information is included in the first PDSCH.

43. A network device, characterized in that, Applied to the non-terrestrial communication network device NTN scenario, a satellite serves multiple covered cells through multiple beams, where the multiple covered cells correspond to the same cell identifier, and the network device includes: The sending module is configured to send first indication information to the terminal device, where the first indication information is used to indicate the frequency domain position of the synchronization signal block SSB and / or the covered cell corresponding to the SSB; The first indication information is used to indicate at least two frequency domain positions of the SSB; the first indication information indicates the association relationship between the identification ID of the bandwidth part BWP and the SSB index transmitted in the SSB transmission opportunity in the BWP; The frequency domain position of the SSB includes: The frequency domain position of the SSB in the BWP where the SSB is transmitted, and the frequency domain position of the SSB in the BWP where the SSB is transmitted includes at least one of the following: the RB number of the first RB where the SSB is transmitted in the BWP; the frequency domain offset between the first RB where the SSB is transmitted and the first RB in the BWP; the position of the synchronization grid where the SSB is transmitted in the synchronization grids included in the BWP; and the synchronization grid number of the synchronization grid where the SSB is transmitted in the synchronization grids included in the BWP.

44. The network device according to claim 43, wherein The frequency domain position of the SSB includes at least one of the following: The number of the synchronization grid where the SSB is transmitted; The identification ID of the bandwidth part BWP where the SSB is transmitted; The ID of the resource block RB set where the SSB is transmitted; and The frequency domain position of the SSB in the RB set where the SSB is transmitted.

45. The network device according to claim 43 or 44, characterized in that, The covered cell corresponding to the SSB includes at least one of the following: The ID of the covered cell corresponding to the SSB; The association relationship between the coverage cell corresponding to the SSB and the BWP; And, The association relationship between the ID of the coverage cell corresponding to the SSB and the ID of the BWP.

46. The network device according to any one of claims 43 to 45, characterized in that, The first indication information is used to indicate at least one of the following: The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency domain position of the at least one SSB in the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the SSB type corresponding to the at least one SSB, where the SSB type includes the SSB defining the cell and the SSB not defining the cell; The association relationship between the index of at least one SSB in the SSB and the ID of the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency domain position of the at least one SSB in the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of at least one coverage cell corresponding to the at least one SSB; The association relationship between the ID of at least one coverage cell and the ID of at least one BWP, where the at least one coverage cell and the at least one BWP correspond to the same SSB; And, the association relationship between at least two of the following: the ID of at least one coverage cell, the ID of at least one BWP, and at least one SSB index.

47. The network device according to any one of claims 43-46, characterized in that, The first indication information is used to determine that the SSB defining the cell is located at a frequency domain position; or, The first indication information is used to determine that at least two SSBs of the cell-defining SSB are located at different frequency domain positions.

48. The network device according to any one of claims 43-47, wherein The sending module is specifically configured to send the first indication information to the terminal device through a physical broadcast channel PBCH, a system message, or a high-layer parameter.

49. The network device according to claim 48, characterized in that, The system message includes at least one of the following: Master information block MIB, system information block one SIB1, other SIBs other than SIB1.

50. The network device according to any one of claims 43-49, characterized in that, The SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency domain position of the SSB, including: The first indication information is used to indicate the frequency domain position of at least one transmitted SSB in the at least one transmission opportunity; or, The first indication information is used to indicate the frequency domain position of at least one non-transmitted SSB in the at least one transmission opportunity.

51. The network device according to any one of claims 43-50, characterized in that, SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location QCL relationship.

52. The network device according to any one of claims 43-51, characterized in that, The first indication information is further used to indicate the time domain position of the SSB.

53. The network device according to any one of claims 43-52, characterized in that, The first indication information is further used for the terminal device to determine the first SSB position of the SSB transmitted on the activated BWP.

54. The network device according to claim 53, wherein The sending module is further configured to send a first physical downlink shared channel (PDSCH) on the activated BWP according to the first SSB position, where, when there is an overlap between the resource blocks (RBs) included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission, and the first PDSCH includes at least one of the following cases: The PDSCH scheduled by a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambling code of a system information radio network temporary identifier (SI-RNTI) and the system message indicated in the downlink control information (DCI) in the PDCCH is 1; The PDSCH scheduled by a PDCCH with a CRC scrambling code of an SI-RNTI and the PDSCH includes other system information blocks (SIBs) other than SIB1; The PDSCH scheduled by a PDCCH with a CRC scrambling code of a random access radio network temporary identifier (RA-RNTI), a message B radio network temporary identifier (MsgB-RNTI), a paging radio network temporary identifier (P-RNTI), or a temporary cell radio network temporary identifier (TC-RNTI); The PDSCH scheduled by a PDCCH with a CRC scrambling code of a cell radio network temporary identifier (C-RNTI), a modulation and coding scheme radio network temporary identifier (MCS-C-RNTI), or a configured scheduling radio network temporary identifier (CS-RNTI); and A semi-persistent scheduling (SPS) PDSCH.

55. A terminal device, characterized in that, Applied to a non-terrestrial network (NTN) scenario, a satellite serves multiple covered cells through multiple beams, where the multiple covered cells correspond to the same cell identifier, and the terminal device includes: A receiver, configured to receive first indication information sent by a network device, where the first indication information is used to indicate the frequency-domain position of a synchronization signal block (SSB), and / or the covered cell corresponding to the SSB; A processor, configured to determine the frequency-domain position of the SSB, and / or the covered cell corresponding to the SSB according to the first indication information; The first indication information is used to indicate at least two frequency-domain positions of the SSB; the first indication information indicates the association relationship between the identifier (ID) of a bandwidth part (BWP) and the SSB index transmitted in the SSB transmission opportunity in the BWP; The frequency-domain position of the SSB includes: The frequency-domain position of the SSB in the BWP where the SSB is transmitted, and the frequency-domain position of the SSB in the BWP where the SSB is transmitted includes at least one of the following: the RB number of the first RB transmitted by the SSB in the BWP; the frequency-domain offset between the first RB transmitted by the SSB and the first RB in the BWP; the position of the synchronization raster transmitted by the SSB in the synchronization raster included in the BWP; and the synchronization raster number of the synchronization raster transmitted by the SSB in the synchronization raster included in the BWP.

56. The terminal device according to claim 55, characterized in that, The frequency-domain position of the SSB includes at least one of the following: The number of the synchronization raster transmitted by the SSB; The identifier (ID) of the bandwidth part (BWP) where the SSB is transmitted; The ID of the resource block (RB) set for the SSB transmission; and, The frequency-domain position of the SSB in the RB set for the SSB transmission.

57. The terminal device according to claim 55 or 56, characterized in that, The first indication information is used to indicate at least one of the following: The ID of the coverage cell corresponding to the SSB; The association relationship between the coverage cell corresponding to the SSB and the BWP; and, The association relationship between the ID of the coverage cell corresponding to the SSB and the ID of the BWP.

58. The terminal device according to any one of claims 55 to 57, characterized in that, The first indication information is used to indicate at least one of the following: The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the BWP transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the SSB type corresponding to the at least one SSB, where the SSB type includes the SSB that defines a cell and the SSB that does not define a cell; The association relationship between the index of at least one SSB in the SSB and the ID of the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of at least one coverage cell corresponding to the at least one SSB; The association relationship between the ID of at least one coverage cell and the ID of at least one BWP, where the at least one coverage cell corresponds to the same SSB as the at least one BWP; And, the association relationship between at least two of the following: the ID of at least one coverage cell, the ID of at least one BWP, and at least one SSB index.

59. The terminal device according to any one of claims 55 to 58, characterized in that The first indication information is used to determine that the SSB that defines a cell is located at a frequency-domain position; or, The first indication information is used to determine that at least two SSBs of the cell-defining SSB are located at different frequency-domain positions.

60. The terminal device according to any one of claims 55 to 59, characterized in that The receiver is specifically configured to receive the first indication information sent by the network device through the physical broadcast channel (PBCH), system message, or high-layer parameter.

61. The terminal device according to claim 60, characterized in that, The system message includes at least one of the following: Master information block (MIB), system information block type 1 (SIB1), other SIBs other than SIB1.

62. The terminal device according to any one of claims 55 to 61, characterized in that, The SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency-domain position of the SSB, including: The first indication information is used to indicate the frequency-domain position of at least one transmitted SSB in the at least one transmission opportunity; or, The first indication information is used to indicate the frequency-domain position of at least one untransmitted SSB in the at least one transmission opportunity.

63. The terminal device according to any one of claims 55 to 62, characterized in that, The SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location (QCL) relationship.

64. The terminal device according to any one of claims 55 to 63, characterized in that, The first indication information is further used to indicate the time-domain position of the SSB.

65. The terminal device according to any one of claims 55 to 64, characterized in that the processor is further configured to determine a first SSB position of the SSB transmitted on the activated BWP according to the first indication information.

66. The terminal device according to claim 65, characterized in that the receiver is further configured to receive a first physical downlink shared channel PDSCH sent by the network device according to the first SSB position on the activated BWP; the processor is further configured to, when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission, and the first PDSCH includes at least one of the following cases: a PDSCH scheduled by a physical downlink control channel PDCCH with a cyclic redundancy code CRC scrambling code being a SI-RNTI and the system message indicated in the physical downlink control channel DCI in the PDCCH being 1; a PDSCH scheduled by a PDCCH with a CRC scrambling code being a system information radio network device temporary identity SI-RNTI and the PDSCH including other SIBs other than SIB1; a PDSCH scheduled by a PDCCH with a CRC scrambling code being a random access radio network device temporary identity RA-RNTI, a MsgB-RNTI, a paging radio network device temporary identity P-RNTI, or a temporary cell radio network device temporary identity TC-RNTI; a PDSCH scheduled by a PDCCH with a CRC scrambling code being a cell radio network device temporary identity C-RNTI, a modulation and coding scheme radio network device temporary identity MCS-C-RNTI, or a configured scheduling radio network device temporary identity CS-RNTI; and a semi-persistent scheduling SPS PDSCH.

67. The terminal device according to claim 65, characterized in that the receiver is further configured to, when the terminal device receives the first indication information sent by the network device through a PBCH or an MIB, the terminal device receives a first PDSCH scheduled by a PDCCH with a CRC scrambling code being a SI-RNTI and the system message indicated in the DCI in the PDCCH being 0, or receives a first PDSCH scheduled by a PDCCH with a CRC scrambling code being a SI-RNTI and the first PDSCH including SIB1, receive the first PDSCH according to the first SSB position; the processor is further configured to, when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, determine that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission.

68. The terminal device according to any one of claims 55 to 64, characterized in that, The terminal device further includes: The processor is further configured to determine that there is no resource element (RE) in the REs included in the first physical downlink shared channel (PDSCH) for SSB transmission when the terminal device receives the first PDSCH scheduled by a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambling code of SI-RNTI and the system message indicated in the downlink control information (DCI) in the PDCCH is 0, or when the terminal device receives the first PDSCH scheduled by a PDCCH with a CRC scrambling code of SI-RNTI and the first PDSCH includes System Information Block 1 (SIB1).

69. The terminal device according to claim 68, characterized in that, The first PDSCH includes the first indication information.

70. A network device, characterized in that, Applied to the non-terrestrial network (NTN) scenario, where a satellite serves multiple covered cells through multiple beams, and the multiple covered cells correspond to the same cell identifier. The network device includes: A transmitter, configured to send first indication information to a terminal device, where the first indication information is used to indicate the frequency-domain position of a synchronization signal block (SSB), and / or the covered cell corresponding to the SSB. The terminal device determines the frequency-domain position of the SSB, and / or the covered cell corresponding to the SSB, according to the first indication information. The first indication information is used to indicate at least two frequency-domain positions of the SSB; the first indication information indicates the association relationship between the identifier (ID) of a bandwidth part (BWP) and the SSB index transmitted in the SSB transmission opportunity in the BWP. The frequency-domain position of the SSB includes: The frequency-domain position of the SSB in the BWP where the SSB is transmitted, and the frequency-domain position of the SSB in the BWP where the SSB is transmitted includes at least one of the following: the resource block (RB) number of the first RB where the SSB is transmitted in the BWP; the frequency-domain offset between the first RB where the SSB is transmitted and the first RB in the BWP; the position of the synchronization raster where the SSB is transmitted in the synchronization rasters included in the BWP; and the synchronization raster number of the synchronization raster where the SSB is transmitted in the synchronization rasters included in the BWP.

71. The network device according to claim 70, characterized in that, The frequency-domain position of the SSB includes at least one of the following: The number of the synchronization raster where the SSB is transmitted; The ID of the bandwidth part (BWP) where the SSB is transmitted; The ID of the resource block (RB) set where the SSB is transmitted; and The frequency-domain position of the SSB in the RB set where the SSB is transmitted.

72. The network device according to claim 70 or 71, characterized in that, The covered cell corresponding to the SSB includes at least one of the following: The ID of the covered cell corresponding to the SSB; The association relationship between the covered cell corresponding to the SSB and the BWP; And The association relationship between the ID of the covered cell corresponding to the SSB and the ID of the BWP.

73. The network device according to any one of claims 70-72, characterized in that, The first indication information is used to indicate at least one of the following: The association relationship between the index of at least one SSB in the SSB and the number of the synchronization raster where the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the ID of the BWP where the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the frequency-domain position of the at least one SSB in the BWP where the at least one SSB is transmitted; The association relationship between the index of at least one SSB in the SSB and the SSB type corresponding to the at least one SSB, where the SSB type includes the SSB that defines a cell and the SSB that does not define a cell; The association relationship between the index of at least one SSB in the SSB and the ID of the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the frequency domain position of the at least one SSB in the RB set transmitted by the at least one SSB; The association relationship between the index of at least one SSB in the SSB and the ID of at least one covered cell corresponding to the at least one SSB; The association relationship between the ID of at least one covered cell and the ID of at least one BWP, where the at least one covered cell and the at least one BWP correspond to the same SSB; And, the association relationship between at least two of the following: the ID of at least one covered cell, the ID of at least one BWP, and at least one SSB index.

74. The network device according to any one of claims 70-73, characterized in that, The first indication information is used to determine that the SSB that defines a cell is located at a frequency domain position; or, The first indication information is used to determine that at least two SSBs of the defined cell are located at different frequency domain positions.

75. The network device according to any one of claims 70-74, wherein The transmitter is specifically configured to send the first indication information to the terminal device through a physical broadcast channel PBCH, system message, or high-layer parameter.

76. The network device according to claim 75, wherein The system message includes at least one of the following: Master information block MIB, system information block one SIB1, other SIBs other than SIB1.

77. The network device according to any one of claims 70-76, characterized in that, The SSB includes the SSB in at least one transmission opportunity, and the first indication information is used to indicate the frequency domain position of the SSB, including: The first indication information is used to indicate the frequency domain position of at least one transmitted SSB in the at least one transmission opportunity; or, The first indication information is used to indicate the frequency domain position of at least one non-transmitted SSB in the at least one transmission opportunity.

78. The network device according to any one of claims 70-77, characterized in that, The SSBs with the same SSB index transmitted in the SSB have the same quasi-co-location QCL relationship.

79. The network device according to any one of claims 70-78, characterized in that, The first indication information is further used to indicate the time domain position of the SSB.

80. The network device according to any one of claims 70-79, characterized in that, The first indication information is further used for the terminal device to determine the first SSB position of the SSB transmitted on the activated BWP.

81. The network device according to claim 80, wherein The transmitter is further configured to send a first physical downlink shared channel PDSCH on the activated BWP according to the first SSB position, where when there is an overlap between the RBs included in the first SSB position and the RBs included in the first PDSCH, the terminal device determines that the resources corresponding to the overlapping RBs are not used for the first PDSCH transmission, and the first PDSCH includes at least one of the following situations: The PDSCH scheduled by a physical downlink control channel PDCCH with a cyclic redundancy code CRC scrambling code of SI-RNTI and the system message indicated in the physical downlink control channel DCI in the PDCCH is 1; The CRC scrambling code is for the PDSCH scheduled by the PDCCH with the system information radio network device temporary identity SI-RNTI, and other SIBs other than SIB1 are included in the PDSCH; The CRC scrambling code is for the PDSCH scheduled by the PDCCH with the random access radio network device temporary identity RA-RNTI, MsgB-RNTI, paging radio network device temporary identity P-RNTI, or temporary cell radio network device temporary identity TC-RNTI; The CRC scrambling code is for the PDSCH scheduled by the PDCCH with the cell radio network device temporary identity C-RNTI, modulation and coding scheme radio network device temporary identity MCS-C-RNTI, or configured scheduling radio network device temporary identity CS-RNTI; and, Semi-persistent scheduling SPS PDSCH.

82. A computer-readable storage medium, comprising instructions that, when run on a computer, cause the computer to execute the method according to any one of claims 1-15, or, 16-27.

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