Wireless communication method, terminal device and network device

Abstract

The embodiments of the present application provide a wireless communication method, a terminal device, and a network device. In the frequency reuse deployment scenario of adjacent satellite beams in NTN, corresponding to the transmission of MIB and SIB, by introducing SSB frequency hopping transmission, the same-frequency interference between different SSBs can be effectively reduced, and the initial access performance of the terminal device can be improved. The wireless communication method includes: the terminal device searches for SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids correspond to SSB transmissions of different satellite beams, or the multiple synchronization grids correspond to different satellite beams.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and more specifically, to a wireless communication method, a terminal device, and a network device. Background Art

[0002] The 5th Generation New Radio (5G NR) system defines deployment scenarios for non-terrestrial networks (NTN) systems, including satellite networks. Leveraging the wide-area coverage capabilities of satellites, NTN systems can achieve 5G NR service continuity. In order to reduce co-channel interference between different satellite beams, different frequencies / carriers / bands can be used for adjacent satellite beams during network deployment. The Master Information Block (MIB) and System Information Block (SIB) are transmitted repeatedly at the same frequency position across all synchronization signal blocks (SSB) beam directions. How to avoid co-channel interference between different SSB beams is an urgent problem to be solved. Summary of the Invention

[0003] The embodiments of the present application provide a wireless communication method, a terminal device, and a network device. In the frequency reuse deployment scenario of adjacent satellite beams in NTN, corresponding to the transmission of MIB and SIB, by introducing SSB frequency hopping transmission, the co-channel interference between different SSBs can be effectively reduced, thereby improving the initial access performance of the terminal device.

[0004] In a first aspect, a wireless communication method is provided, the method comprising:

[0005] The terminal device searches for SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids respectively correspond to SSB transmissions of different satellite beams, or the multiple synchronization grids respectively correspond to different satellite beams.

[0006] In a second aspect, a wireless communication method is provided, the method comprising:

[0007] The network device sends SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids respectively correspond to SSB transmissions of different satellite beams, or the multiple synchronization grids respectively correspond to different satellite beams.

[0008] According to a third aspect, a wireless communication method is provided, the method comprising:

[0009] The terminal device receives the PDCCH sent by the network device in a frequency hopping manner to indicate SIB1 transmission.

[0010] In a fourth aspect, a wireless communication method is provided, the method comprising:

[0011] The network device transmits the PDCCH for indicating SIB1 transmission in a frequency hopping manner.

[0012] In a fifth aspect, a terminal device is provided for executing the method in the first aspect.

[0013] Specifically, the terminal device includes a functional module for executing the method in the above-mentioned first aspect.

[0014] In a sixth aspect, a network device is provided for executing the method in the second aspect.

[0015] Specifically, the network device includes a functional module for executing the method in the above second aspect.

[0016] In a seventh aspect, a terminal device is provided for executing the method in the third aspect.

[0017] Specifically, the terminal device includes a functional module for executing the method in the third aspect above.

[0018] In an eighth aspect, a network device is provided for executing the method in the fourth aspect.

[0019] Specifically, the network device includes a functional module for executing the method in the fourth aspect above.

[0020] In a ninth aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the method in the first aspect.

[0021] In a tenth aspect, a network device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the method in the second aspect.

[0022] In an eleventh aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the method in the third aspect.

[0023] In a twelfth aspect, a network device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the method in the fourth aspect.

[0024] In the thirteenth aspect, a device is provided for implementing the method in any one of the first to fourth aspects above.

[0025] Specifically, the apparatus includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the apparatus executes the method in any one of the first to fourth aspects described above.

[0026] In a fourteenth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in any one of the first to fourth aspects above.

[0027] In a fifteenth aspect, a computer program product is provided, comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method in any one of the first to fourth aspects above.

[0028] In the sixteenth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to fourth aspects above.

[0029] Through the technical solutions of the first and second aspects mentioned above, the network device sends SSB at different frequency positions, that is, the network device sends SSB by frequency hopping, which can effectively reduce the co-frequency interference between different SSBs and improve the initial access performance of the terminal device.

[0030] Through the technical solutions of the third and fourth aspects mentioned above, the network equipment uses a frequency hopping method to send PDCCH for indicating SIB1 transmission. By introducing PDCCH frequency hopping transmission, it can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of the terminal equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of a communication system architecture applied in an embodiment of the present application.

[0032] Figure 2 This is a schematic diagram of a satellite beam provided by this application.

[0033] Figure 3 It is a schematic flowchart of a wireless communication method provided according to an embodiment of the present application.

[0034] Figure 4This is a schematic diagram of sending SSB according to an embodiment of the present application.

[0035] Figure 5 This is a schematic flowchart of another wireless communication method provided according to an embodiment of the present application.

[0036] Figure 6 This is a schematic diagram of sending a PDCCH for indicating SIB1 transmission provided according to an embodiment of the present application.

[0037] Figure 7 This is a schematic diagram of another method for sending a PDCCH for indicating SIB1 transmission provided according to an embodiment of the present application.

[0038] Figure 8 This is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

[0039] Figure 9 This is a schematic block diagram of a network device provided according to an embodiment of the present application.

[0040] Figure 10 This is a schematic block diagram of another terminal device provided according to an embodiment of the present application.

[0041] Figure 11 This is a schematic block diagram of another network device provided according to an embodiment of the present application.

[0042] Figure 12 This is a schematic block diagram of a communication device provided according to an embodiment of the present application.

[0043] Figure 13 This is a schematic block diagram of a device provided according to an embodiment of the present application.

[0044] Figure 14 It is a schematic block diagram of a communication system provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. With respect to the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The technical solutions of the embodiments of the present 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, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0047] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will 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 the present application can also be applied to these communication systems.

[0048] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0049] Optionally, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, where the authorized spectrum can also be considered as an unshared spectrum.

[0050] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0051] The terminal device can be a station (ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a 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.

[0052] In an embodiment 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 the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0053] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, 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 a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0054] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0055] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode 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 or base station (gNB) in an NR network, or a network device in a future evolved PLMN network or a network device in an NTN network, etc.

[0056] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Alternatively, 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 set up in a location such as land or water.

[0057] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0058] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices within the coverage area.

[0059] Figure 1 One network device and two terminal devices are shown as an example. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area. This embodiment of the present application does not limit this.

[0060] Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0061] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be called a communication device. Figure 1Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here; the communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0062] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0063] The terms used in the embodiments of this application are intended only to explain the specific embodiments of this application and are not intended to limit this application. The terms "first," "second," "third," and "fourth," etc. in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions.

[0064] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" 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 between A and B.

[0065] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0066] The 5G NR system defines deployment scenarios for NTN systems, including satellite networks. NTN generally uses satellite communications to provide communication services to terrestrial users. Compared to terrestrial cellular networks, satellite communications offer many unique advantages. First, satellite communications are not restricted by user location. For example, conventional terrestrial communications cannot cover areas such as oceans, high mountains, and deserts where communication equipment cannot be deployed or where there is a sparse population. However, satellite communications, because a single satellite can cover a large area and satellites orbit the Earth, theoretically every corner of the globe can be covered. Second, satellite communications have significant social value. Satellite communications can provide low-cost coverage in remote mountainous areas and poor, underdeveloped countries and regions, enabling people in these areas to enjoy advanced voice communications and mobile internet technologies, narrowing the digital divide with developed regions and promoting their development. Third, satellite communications offer long range, and the cost of communications does not increase significantly with increasing distance. Finally, satellite communications are highly stable and unaffected by natural disasters.

[0067] Communication satellites are divided into low-Earth orbit (LEO) satellites, medium-Earth orbit (MEO) satellites, geostationary Earth orbit (GEO) satellites, high elliptical orbit (HEO) satellites, etc. according to their orbital altitudes.

[0068] For example, LEO satellites have an altitude range of 500 km to 1500 km, corresponding to an orbital period of approximately 1.5 to 2 hours. The signal propagation delay for single-hop communication between users is typically less than 20 milliseconds, and the maximum satellite visibility time is 20 minutes. The short signal propagation distance and low link loss reduce the transmit power requirements of user terminals.

[0069] For example, a GEO satellite orbits at an altitude of 35,786 km and revolves around the Earth every 24 hours. The signal propagation delay for single-hop communication between users is typically 250 ms.

[0070] For the NTN system, in order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, the satellite uses multiple beams to cover the ground. A 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 tens to hundreds of kilometers.

[0071] Satellite beams are the smallest units of satellite coverage of the Earth's surface, corresponding to different directions. Typically, a satellite uses hundreds or thousands of satellite beams to cover the Earth's surface. These satellite beams can be deployed as different cells or within the same cell. Considering the possible co-channel interference between adjacent satellite beams, a frequency reuse factor greater than 1 is generally considered, that is, adjacent satellite beams are distinguished by different frequencies / carriers / bands, such as Figure 3 As shown, satellite beams with the same pattern use the same frequency / carrier / frequency band.

[0072] It should be understood that in the embodiment of the present application, NR can also be deployed independently. In order to reduce air interface signaling and quickly restore wireless connections and quickly restore data services in the 5G network environment, a new radio resource control (RRC) state is defined, namely the RRC_INACTIVE (inactive) state. This state is different from the RRC_IDLE (idle) and RRC_CONNECTED (connected) states.

[0073] In the RRC_IDLE state, mobility is based on cell selection and reselection by the terminal device, paging is initiated by the core network (CN), and the paging area is configured by the CN. There is no terminal device access stratum (AS) context on the base station side, and no RRC connection exists.

[0074] In the RRC_CONNECTED state, an RRC connection exists, and a device AS context exists between the base station and the terminal. The network knows the terminal's location at the cell level. Mobility is controlled by the network. Unicast data can be transmitted between the terminal and the base station.

[0075] RRC_INACTIVE: Mobility is based on cell selection and reselection of the terminal device. There is a connection between CN and NR. The AS context of the terminal device exists on a certain base station. Paging is triggered by the Radio Access Network (RAN). The RAN-based paging area is managed by the RAN. The network equipment knows the location of the terminal device based on the RAN paging area level.

[0076] It should be noted that the non-activated state may also be referred to as the deactivated state, which is not limited in this application.

[0077] For initial access terminals in the NR system, the first step after entering the network is to perform a cell search. The main purpose of cell search is to discover cells. Since UEs generally lack prior knowledge of actual cell deployments, during the cell search process, the UE needs to determine the cell location within the deployable frequency band of potential cells through methods such as frequency scanning, then obtain cell information and attempt to initiate cell access.

[0078] The synchronization grid is a series of frequencies that can be used to transmit synchronization signals. Network deployment requires establishing cells, which require specific synchronization signals. The configurable locations of synchronization signals correspond to synchronization grid locations. For example, if point A in the frequency domain is a frequency in the synchronization grid, then when an operator deploys a cell near point A, the synchronization signal center can be configured at point A. When a UE searches for a cell in the frequency band where point A resides, it can discover the cell using the synchronization signal at point A and access it.

[0079] In the NR system, SSBs can be used for initial UE access or configured as measurement reference signals for UE measurements. The former is used for UE access to a cell, its frequency domain location is on the synchronization raster, and it is associated with SIB1 information. The latter is not associated with SIB1 information and cannot be used for UE access to a cell, even if its frequency domain location is also on the synchronization raster. The former is called a cell-defining SSB, and the latter is called a non-cell-defining SSB. In other words, a UE can only access a cell using a cell-defining SSB. Non-cell-defining SSBs can also be configured on the synchronization raster. For a UE accessing the cell for the first time, when searching for an SSB based on the synchronization raster, these two types of SSBs may be found. If a non-cell-defining SSB is found, since it is not associated with SIB1 information, the UE cannot obtain the control information required for SIB1 reception through the MIB information carried on the physical broadcast channel (PBCH) of the SSB. The UE must continue searching for a cell-defining SSB to access the cell. The base station can carry an indication information in the non-cell-defined SSB to indicate the frequency offset between the global synchronization channel number (GSCN) where the cell-defined SSB is located and the GSCN where the currently searched non-cell-defined SSB is located. In this way, even if the UE detects a non-cell-defined SSB, it can determine the GSCN where the cell-defined SSB is located through the indication information carried therein. Based on this auxiliary information, the UE can directly search for the cell-defined SSB at the target GSCN location pointed to, thereby avoiding the UE's blind search for the cell-defined SSB and reducing the delay and power consumption of the cell search. The GSCN offset information is indicated by the information carried by the PBCH.

[0080] During the initial access process, the UE attempts to search for the SSB through the possible time-frequency positions of the defined SSB, and obtains time and frequency synchronization, radio frame timing, and physical cell identification (ID) through the detected SSB. Furthermore, the UE can also determine the search space information of the physical downlink control channel (PDCCH) of the physical downlink shared channel (PDSCH) that schedules the SIB1 through the MIB information carried in the PBCH, namely, control resource set (CORESET) #0 and search space #0.

[0081] Based on the MIB indication, the UE monitors the PDCCH that schedules the PDSCH carrying SIB1 in search space #0 to obtain SIB1 information.

[0082] It should be noted that to reduce co-channel interference between different satellite beams, adjacent satellite beams can use different frequencies / carriers / bands. A satellite beam typically contains one or more SSB beams. MIB and SIB transmissions are repeated at the same frequency position across all SSB beam directions. This can cause co-channel interference between different SSB beams. Preventing co-channel interference between different SSB beams is an urgent issue.

[0083] Based on the above problems, this application proposes a frequency hopping scheme. In the frequency reuse deployment scenario of adjacent satellite beams in NTN, by introducing MIB frequency hopping transmission and SIB frequency hopping transmission, it can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of terminal devices.

[0084] The technical solution of this application is described in detail below through specific embodiments.

[0085] Figure 3 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application, such as Figure 3 As shown, the method 200 may include at least part of the following contents:

[0086] S210: The network device transmits SSBs at frequency positions corresponding to a plurality of synchronization grids, wherein the plurality of synchronization grids respectively correspond to SSB transmissions of different satellite beams, or the plurality of synchronization grids respectively correspond to different satellite beams;

[0087] S220, the terminal device searches for SSB at frequency positions corresponding to multiple synchronization grids.

[0088] Optionally, the embodiments of the present application are applied to the frequency reuse deployment scenario of adjacent satellite beams in NTN. In addition, the embodiments of the present application are applied to the initial access process of a terminal device. Of course, the embodiments of the present application can also be applied to some other scenarios, which are not limited by the present application.

[0089] It should be understood that the synchronization grid is a series of frequency points that can be used to send synchronization signals. For details, please refer to the above description of the synchronization grid, which will not be repeated here.

[0090] In an embodiment of the present application, the multiple synchronization grids correspond to SSB transmissions of different satellite beams, respectively, or the multiple synchronization grids correspond to different satellite beams, respectively. In this case, at least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.

[0091] That is to say, in the embodiment of the present application, the network device sends SSB at different frequency positions, that is, the network device sends SSB by frequency hopping, which can effectively reduce the co-frequency interference between different SSBs and improve the initial access performance of the terminal device.

[0092] It should be noted that in the embodiment of the present application, SSB can also be called synchronization signal / physical broadcast channel block (SS / PBCH block).

[0093] Optionally, in some embodiments, the SSB includes a cell-defining SSB.

[0094] It should be noted that the terminal device can access the cell through the cell definition SSB.

[0095] Optionally, the cell-defining SSBs transmitted at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell. That is, the network device transmits cell-defining SSBs for the same cell at the frequency positions corresponding to the multiple synchronization grids, and the multiple synchronization grids correspond to the transmission of cell-defining SSBs for different satellite beams. In this case, the cell-defining SSBs transmitted by the network device at the frequency position corresponding to one synchronization grid correspond to at least one SSB beam contained in one satellite beam.

[0096] Optionally, the MIB in the cell definition SSB is used by the terminal device to obtain control information for receiving SIB1 during the initial access process. That is, after searching for the cell definition SSB, the terminal device can obtain control information for receiving SIB1 during the initial access process based on the MIB in the cell definition SSB.

[0097] Specifically, when the terminal device searches for the cell-defining SSB at the frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the terminal device obtains control information for receiving SIB1 according to the MIB in the cell-defining SSB, and the terminal device receives SIB1 according to the control information.

[0098] Therefore, in the embodiment of the present application, due to the SSB frequency hopping transmission, that is, the MIB frequency hopping transmission in the SSB. In addition, when the network device is configured to receive the control information of SIB1, it can configure SIB1 to also perform frequency hopping transmission. In other words, the embodiment of the present application can introduce MIB frequency hopping transmission and SIB frequency hopping transmission, which can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of the terminal device.

[0099] Optionally, in some embodiments, the SSB includes a non-cell-defining SSB. The non-cell-defining SSB can be configured as a measurement reference signal to the terminal device for measurement. The non-cell-defining SSB is not associated with SIB1 information and cannot be used for the terminal device to access the cell even if its frequency domain location is also on the synchronization grid.

[0100] It should be noted that, for non-cell-defining SSBs sent at frequency positions corresponding to synchronization grids, the network device sends non-cell-defining SSBs at frequency positions corresponding to multiple synchronization grids, and the multiple synchronization grids correspond to the transmission of non-cell-defining SSBs for different satellite beams. In this case, the non-cell-defining SSBs sent by the network device at a frequency position corresponding to one synchronization grid correspond to at least one SSB beam contained in one satellite beam.

[0101] Specifically, when the terminal device searches for a non-cell-defined SSB at a frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the terminal device obtains the frequency offset between the GSCN where the cell-defined SSB is located and the GSCN where the non-cell-defined SSB is located based on the MIB in the non-cell-defined SSB; the terminal device determines the GSCN where the cell-defined SSB is located based on the frequency offset, and searches for the cell-defined SSB on the GSCN where the cell-defined SSB is located. Furthermore, after searching for the cell-defined SSB on the GSCN where the cell-defined SSB is located, the terminal device can obtain control information for receiving SIB1 based on the MIB in the cell-defined SSB, and the terminal device receives SIB1 based on the control information.

[0102] Optionally, in the embodiment of the present application, the control information includes CORESET #0 and search space #0. Of course, it can also be some other information, which is not limited by the present application.

[0103] Optionally, in some embodiments of the present application, for different satellite beams, the frequency position of transmitting the non-cell-defining SSB relative to the frequency offset value of the cell-defining SSB is the same. Figure 4As shown, the network device sends the non-cell definition SSB1 at the frequency position corresponding to the synchronization grid 6 through the satellite beam 1, and the MIB in the non-cell definition SSB1 indicates that the frequency offset (offset) between the GSCN where the cell definition SSB1 is located and the GSCN where the non-cell definition SSB1 is located is 6 synchronization grids, that is, the network device sends the cell definition SSB1 at the frequency position corresponding to the synchronization grid 12; the network device sends the non-cell definition SSB2 at the frequency position corresponding to the synchronization grid 5 through the satellite beam 2, and the MIB in the non-cell definition SSB2 indicates that the frequency offset (offset) between the GSCN where the cell definition SSB2 is located and the GSCN where the non-cell definition SSB2 is located is also 6 synchronization grids, that is, the network device sends the cell definition SSB at the frequency position corresponding to the synchronization grid 11. 2; The network device sends the non-cell definition SSB3 at the frequency position corresponding to the synchronization grid 4 through the satellite beam 3. The MIB in the non-cell definition SSB3 indicates that the frequency offset (offset) between the GSCN where the cell definition SSB3 is located and the GSCN where the non-cell definition SSB3 is located is also 6 synchronization grids, that is, the network device sends the cell definition SSB3 at the frequency position corresponding to the synchronization grid 10; The network device sends the non-cell definition SSB4 at the frequency position corresponding to the synchronization grid 3 through the satellite beam 4. The MIB in the non-cell definition SSB4 indicates that the frequency offset (offset) between the GSCN where the cell definition SSB4 is located and the GSCN where the non-cell definition SSB4 is located is also 6 synchronization grids, that is, the network device sends the cell definition SSB4 at the frequency position corresponding to the synchronization grid 9.

[0104] Therefore, in an embodiment of the present application, in the frequency reuse deployment scenario of adjacent satellite beams in NTN, corresponding to the transmission of MIB and SIB, the network device sends SSB at different frequency positions, that is, the network device sends SSB by frequency hopping, which can effectively reduce the co-frequency interference between different SSBs and improve the initial access performance of the terminal device.

[0105] Figure 5 is a schematic flow chart of a wireless communication method 300 according to an embodiment of the present application, such as Figure 5 As shown, the method 300 may include at least part of the following contents:

[0106] S310, the network device sends a PDCCH for indicating SIB1 transmission using a frequency hopping method;

[0107] S320, the terminal device receives a PDCCH sent by the network device in a frequency hopping manner to indicate SIB1 transmission.

[0108] Optionally, the embodiments of the present application are applied to the frequency reuse deployment scenario of adjacent satellite beams in NTN. In addition, the embodiments of the present application are applied to the initial access process of a terminal device. Of course, the embodiments of the present application can also be applied to some other scenarios, which are not limited by the present application.

[0109] Optionally, in an embodiment of the present application, the frequency hopping mode includes:

[0110] In one SIB1 repetition period, when the PDCCH indicating SIB1 transmission is transmitted in each SSB beam direction, the PDCCHs in different SSB beam directions are transmitted in different frequency resource positions.

[0111] Optionally, the frequency hopping mode is pre-configured or agreed upon by a protocol, and / or the frequency hopping interval is pre-configured or agreed upon by a protocol.

[0112] It should be understood that a satellite beam typically includes one or more SSB beams.

[0113] In an embodiment of the present application, within a SIB1 repetition period, the PDCCH used to indicate SIB1 transmission is sent in the process of traversing various SSB beam directions, and the PDCCHs of different SSB beam directions are sent at different frequency resource positions. That is to say, in an embodiment of the present application, the network device sends PDCCH at different frequency positions, that is, the network device uses different frequency positions to hop and send PDCCH in the process of traversing various SSB beam directions, which can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of the terminal device.

[0114] It should be noted that in the embodiment of the present application, SSB can also be called synchronization signal / physical broadcast channel block (SS / PBCH block).

[0115] Optionally, in an embodiment of the present application, the terminal device attempts to receive a PDCCH for indicating SIB1 transmission on a PDCCH time-frequency resource corresponding to multiple SSB beams among the SSB beams traversed by the network device; or, the terminal device attempts to receive a PDCCH for indicating SIB1 transmission on a PDCCH time-frequency resource corresponding to one SSB beam among the SSB beams traversed by the network device.

[0116] Optionally, in some embodiments, the PDCCH used to indicate SIB1 transmission is frequency-hopped within the frequency range corresponding to CORESET#0. Figure 6As shown, within one SIB1 repetition period, the PDCCH used to indicate SIB1 transmission is transmitted in the directions of SSB beam 1, SSB beam 2, SSB beam 3, and SSB beam 4 within the frequency range corresponding to CORESET#0. PDCCHs in different SSB beam directions are transmitted at different frequency resource positions within the frequency range corresponding to CORESET#0. In addition, for PDCCH transmission within other SIB1 repetition periods, the frequency hopping transmission method is similar and will not be repeated here.

[0117] Optionally, in some other embodiments, the PDCCH for indicating SIB1 transmission is transmitted within the frequency range corresponding to CORESET#0, and the CORESET#0 corresponds to different frequency ranges in different time periods. Figure 7 As shown, CORESET#0 corresponds to different frequency ranges in different time periods. Within a SIB1 repetition period, the PDCCH used to indicate SIB1 transmission is transmitted in the directions of SSB beam 1, SSB beam 2, SSB beam 3, and SSB beam 4 within the frequency range corresponding to CORESET#0. In this process, the PDCCHs in different SSB beam directions are transmitted at different frequency resource positions within the frequency range corresponding to CORESET#0. In addition, for PDCCH transmission within other SIB1 repetition periods, the frequency hopping transmission method is similar and will not be repeated here.

[0118] Optionally, in an embodiment of the present application, the network device may send a PDCCH for indicating SIB1 transmission in a frequency hopping manner according to a first correspondence relationship, wherein the first correspondence relationship is a correspondence between an SSB beam index corresponding to the sent PDCCH and a time window, and the network device sends the PDCCH within a frequency resource range corresponding to a corresponding SSB beam index within a time window.

[0119] Optionally, the frequency resource range corresponding to SSB beam 1 is pre-configured or agreed upon by protocol, and the frequency resource range corresponding to SSB beam n is determined according to the frequency resource range corresponding to SSB beam n-1 and the frequency hopping interval, n≥2, and n is an integer.

[0120] Optionally, the frequency resource range corresponding to the SSB beam index is pre-configured or agreed upon by protocol.

[0121] Optionally, the first corresponding relationship is pre-configured or agreed upon by a protocol.

[0122] Therefore, in an embodiment of the present application, in the frequency reuse deployment scenario of adjacent satellite beams in NTN, corresponding to the transmission of MIB and SIB, the network device uses a frequency hopping method to send PDCCH for indicating SIB1 transmission. By introducing PDCCH and SSB frequency hopping transmission, it can effectively reduce the co-channel interference between different SSBs and improve the initial access performance of the terminal device.

[0123] Combined with the above Figures 3 to 7 , describes the method embodiment of the present application in detail, and the following is combined with Figures 8 to 14 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0124] Figure 8 FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. Figure 8 As shown, the terminal device 400 includes:

[0125] The communication unit 410 is used to search for synchronization signal blocks SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids correspond to SSB transmissions of different satellite beams, or the multiple synchronization grids correspond to different satellite beams.

[0126] Optionally, the terminal device 400 further includes: a processing unit 420,

[0127] When the terminal device searches for the cell-defining SSB at the frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the processing unit 420 is used to obtain control information for receiving the system information block SIB1 based on the master information block MIB in the cell-defining SSB, and the communication unit 410 is also used to receive SIB1 based on the control information.

[0128] Optionally, the cell definition SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.

[0129] Optionally, the terminal device 400 further includes: a processing unit 420,

[0130] When the terminal device searches for a non-cell-defining SSB at a frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the processing unit 420 is configured to obtain, according to the MIB in the non-cell-defining SSB, a frequency offset between a global synchronization channel number GSCN where the cell-defining SSB is located and the GSCN where the non-cell-defining SSB is located;

[0131] The processing unit 420 is further configured to determine the GSCN where the cell-defined SSB is located based on the frequency offset, and the communication unit 410 is further configured to search for the cell-defined SSB on the GSCN where the cell-defined SSB is located.

[0132] Optionally, the processing unit 420 is further used to obtain control information for receiving SIB1 according to the MIB in the cell definition SSB, and the communication unit 410 is further used to receive SIB1 according to the control information.

[0133] Optionally, the control information includes control resource set CORESET#0 and search space#0.

[0134] Optionally, for different satellite beams, the frequency offset value of the frequency position for transmitting the non-cell defining SSB relative to the cell defining SSB is the same.

[0135] Optionally, at least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.

[0136] Alternatively, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0137] It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the terminal device 400 are respectively to achieve Figure 3 For the sake of brevity, the corresponding processes of the terminal device in the method 200 are not repeated here.

[0138] Figure 9 FIG. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the present application. Figure 9 As shown, the network device 500 includes:

[0139] The communication unit 410 is used to send synchronization signal blocks SSB at frequency positions corresponding to multiple synchronization grids, wherein the multiple synchronization grids respectively correspond to SSB transmissions of different satellite beams, or the multiple synchronization grids respectively correspond to different satellite beams.

[0140] Optionally, the SSB includes a cell definition SSB.

[0141] Optionally, the cell definition SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.

[0142] Optionally, the cell defines a master information block MIB in the SSB for the terminal device to obtain control information for receiving the system information block SIB1 during the initial access process.

[0143] Optionally, the control information includes control resource set CORESET#0 and search space#0.

[0144] Optionally, the SSB includes a non-cell-defining SSB.

[0145] Optionally, for different satellite beams, the frequency offset value of the frequency position at which the network device transmits the non-cell defining SSB relative to the cell defining SSB is the same.

[0146] Optionally, at least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.

[0147] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0148] It should be understood that the network device 500 according to the embodiment of the present application may correspond to the network device in the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the network device 500 are respectively to implement Figure 3 For the sake of brevity, the corresponding processes of the network device in the method 200 are not described here in detail.

[0149] Figure 10 FIG. 6 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present application. Figure 10 As shown, the terminal device 600 includes:

[0150] The communication unit 610 is configured to receive physical downlink control information PDCCH for indicating transmission of a system information block SIB1, which is sent by a network device in a frequency hopping manner.

[0151] Optionally, the frequency hopping mode includes:

[0152] In one SIB1 repetition period, the PDCCH used to indicate SIB1 transmission is sent in the process of traversing each synchronization signal block SSB beam direction, and the PDCCHs in different SSB beam directions are sent at different frequency resource positions.

[0153] Optionally, the communication unit 610 is specifically configured to:

[0154] Attempt to receive a PDCCH indicating SIB1 transmission on PDCCH time-frequency resources corresponding to multiple SSB beams among the SSB beams traversed by the network device; or,

[0155] An attempt is made to receive a PDCCH indicating SIB1 transmission on a PDCCH time-frequency resource corresponding to one of the SSB beams traversed by the network device.

[0156] Optionally, the PDCCH used to indicate SIB1 transmission frequency hops within a frequency range corresponding to the control resource set CORESET#0.

[0157] Optionally, the PDCCH for indicating SIB1 transmission is transmitted within a frequency range corresponding to CORESET#0, and the CORESET#0 corresponds to different frequency ranges in different time periods.

[0158] Optionally, the frequency hopping mode is pre-configured or agreed upon by a protocol, and / or the frequency hopping interval is pre-configured or agreed upon by a protocol.

[0159] Optionally, the PDCCH for indicating SIB1 transmission is sent by the network device according to the first corresponding relationship,

[0160] Among them, the first corresponding relationship is the corresponding relationship between the SSB beam index corresponding to the sent PDCCH and the time window, and the network device sends PDCCH within the frequency resource range corresponding to a corresponding SSB beam index within a time window.

[0161] Optionally, the frequency resource range corresponding to SSB beam 1 is pre-configured or agreed upon by protocol, and the frequency resource range corresponding to SSB beam n is determined according to the frequency resource range corresponding to SSB beam n-1 and the frequency hopping interval, n≥2, and n is an integer.

[0162] Optionally, the frequency resource range corresponding to the SSB beam index is pre-configured or agreed upon by protocol.

[0163] Optionally, the first corresponding relationship is pre-configured or agreed upon by a protocol.

[0164] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0165] It should be understood that the terminal device 600 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the terminal device 600 are respectively to achieve Figure 5 For the sake of brevity, the corresponding processes of the terminal device in the method 300 are not repeated here.

[0166] Figure 11 FIG. 7 shows a schematic block diagram of a network device 700 according to an embodiment of the present application. Figure 11 As shown, the network device 700 includes:

[0167] The communication unit 710 is configured to transmit physical downlink control information PDCCH for indicating transmission of the system information block SIB1 in a frequency hopping manner.

[0168] Optionally, the frequency hopping mode includes:

[0169] In one SIB1 repetition period, the PDCCH used to indicate SIB1 transmission is sent in the process of traversing each synchronization signal block SSB beam direction, and the PDCCHs in different SSB beam directions are sent at different frequency resource positions.

[0170] Optionally, the PDCCH used to indicate SIB1 transmission frequency hops within a frequency range corresponding to the control resource set CORESET#0.

[0171] Optionally, the PDCCH for indicating SIB1 transmission is transmitted within a frequency range corresponding to CORESET#0, and the CORESET#0 corresponds to different frequency ranges in different time periods.

[0172] Optionally, the frequency hopping mode is pre-configured or agreed upon by a protocol, and / or the frequency hopping interval is pre-configured or agreed upon by a protocol.

[0173] Optionally, the communication unit 710 is specifically configured to:

[0174] According to the first corresponding relationship, a PDCCH for indicating SIB1 transmission is sent in a frequency hopping manner, wherein:

[0175] The first corresponding relationship is the corresponding relationship between the SSB beam index corresponding to the sent PDCCH and the time window, and the network device sends the PDCCH within a frequency resource range corresponding to a corresponding SSB beam index within a time window.

[0176] Optionally, the frequency resource range corresponding to SSB beam 1 is pre-configured or agreed upon by protocol, and the frequency resource range corresponding to SSB beam n is determined according to the frequency resource range corresponding to SSB beam n-1 and the frequency hopping interval, n≥2, and n is an integer.

[0177] Optionally, the frequency resource range corresponding to the SSB beam index is pre-configured or agreed upon by protocol.

[0178] Optionally, the first corresponding relationship is pre-configured or agreed upon by a protocol.

[0179] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0180] It should be understood that the network device 700 according to the embodiment of the present application may correspond to the network device in the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the network device 700 are respectively for implementing Figure 5 For the sake of brevity, the corresponding processes of the network device in the method 300 are not repeated here.

[0181] Figure 12 It is a schematic structural diagram of a communication device 800 provided in an embodiment of the present application. Figure 12 The communication device 800 shown includes a processor 810, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0182] Alternatively, as Figure 12 As shown, the communication device 800 may further include a memory 820. The processor 810 may call and execute a computer program from the memory 820 to implement the method in the embodiment of the present application.

[0183] The memory 820 may be a separate device independent of the processor 810 , or may be integrated into the processor 810 .

[0184] Alternatively, as Figure 12 As shown, the communication device 800 may further include a transceiver 830 , and the processor 810 may control the transceiver 830 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0185] The transceiver 830 may include a transmitter and a receiver. The transceiver 830 may further include an antenna, and the number of antennas may be one or more.

[0186] Optionally, the communication device 800 may specifically be a network device in an embodiment of the present application, and the communication device 800 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0187] Optionally, the communication device 800 may specifically be a mobile terminal / terminal device in an embodiment of the present application, and the communication device 800 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0188] Figure 13 It is a schematic structural diagram of the device of an embodiment of the present application. Figure 13 The device 900 shown includes a processor 910, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0189] Alternatively, as Figure 13 As shown, the apparatus 900 may further include a memory 920. The processor 910 may call and execute a computer program from the memory 920 to implement the method in the embodiment of the present application.

[0190] The memory 920 may be a separate device independent of the processor 910 , or may be integrated into the processor 910 .

[0191] Optionally, the apparatus 900 may further include an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0192] Optionally, the apparatus 900 may further include an output interface 940. The processor 910 may control the output interface 940 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0193] Optionally, the device can be applied to the network equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0194] Optionally, the apparatus can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0195] Optionally, the device mentioned in the embodiments of the present application may also be a chip, for example, a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip chip.

[0196] Figure 14 1 is a schematic block diagram of a communication system 1000 provided in an embodiment of the present application. Figure 14 As shown, the communication system 1000 includes a terminal device 1010 and a network device 1020 .

[0197] Among them, the terminal device 1010 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1020 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0198] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly implemented as a hardware decoding processor, or can be implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0199] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0200] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0201] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0202] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0203] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0204] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0205] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0206] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0207] The embodiment of the present application also provides a computer program.

[0208] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0209] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0210] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0211] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0212] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0213] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0214] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0215] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. In view of this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0216] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device searches for a synchronization signal block SSB at a frequency position corresponding to a plurality of synchronization grids, wherein the plurality of synchronization grids correspond to SSB transmissions of different satellite beams, or the plurality of synchronization grids correspond to different satellite beams; The method further comprises: When the terminal device searches for a cell definition SSB at a frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the terminal device obtains control information for receiving a system information block SIB1 according to a master information block MIB in the cell definition SSB, and the terminal device receives SIB1 according to the control information, wherein SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission; or, When the terminal device searches for a non-cell definition SSB at a frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the terminal device obtains a frequency offset between a global synchronization channel number GSCN where the cell definition SSB is located and a GSCN where the non-cell definition SSB is located according to the MIB in the non-cell definition SSB; The terminal device determines the GSCN where the cell-defining SSB is located according to the frequency offset, and searches for the cell-defining SSB on the GSCN where the cell-defining SSB is located; The terminal device obtains control information for receiving SIB1 according to the MIB in the cell definition SSB, and the terminal device receives SIB1 according to the control information, wherein the SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission.

2. The method according to claim 1, characterized in that The cell definition SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.

3. The method according to claim 1, characterized in that The control information includes a control resource set CORESET#0 and a search space#0.

4. The method according to any one of claims 1 to 3, characterized in that For different satellite beams, the frequency position for transmitting the non-cell defining SSB is the same relative to the frequency offset value of the cell defining SSB.

5. The method according to any one of claims 1 to 3, characterized in that At least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.

6. A wireless communication method, characterized in that: include: The network device sends a synchronization signal block SSB at a frequency position corresponding to a plurality of synchronization grids, wherein the plurality of synchronization grids correspond to SSB transmissions of different satellite beams, or the plurality of synchronization grids correspond to different satellite beams; The SSB includes a cell definition SSB, a master information block MIB in the cell definition SSB is used by the terminal device to obtain control information for receiving a system information block SIB1 during an initial access process, and the SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission; or, The SSB includes a non-cell definition SSB, and the MIB in the non-cell definition SSB is used to obtain a frequency offset between a global synchronization channel number GSCN where a cell definition SSB is located and a GSCN where the non-cell definition SSB is located, and the frequency offset is used to determine the GSCN where the cell definition SSB is located; The method further comprises: The network device sends a cell definition SSB in the GSCN where the cell definition SSB is located. The MIB in the cell definition SSB is used by the terminal device to obtain control information for receiving SIB1 during the initial access process. The SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission.

7. The method according to claim 6, characterized in that The cell definition SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.

8. The method according to claim 6, characterized in that The control information includes a control resource set CORESET#0 and a search space#0.

9. The method according to any one of claims 6 to 8, characterized in that For different satellite beams, the frequency position at which the network device sends the non-cell defining SSB has the same frequency offset value relative to the cell defining SSB.

10. The method according to any one of claims 6 to 8, characterized in that At least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.

11. A terminal device, characterized in that: include: A communication unit, configured to search for a synchronization signal block SSB at frequency positions corresponding to a plurality of synchronization grids, wherein the plurality of synchronization grids correspond to SSB transmissions of different satellite beams, or the plurality of synchronization grids correspond to different satellite beams; The terminal device further includes: a processing unit; When the terminal device searches for a cell definition SSB at a frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the processing unit is used to obtain control information for receiving a system information block SIB1 according to a master information block MIB in the cell definition SSB, and the communication unit is further used to receive SIB1 according to the control information, wherein the SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission; or, When the terminal device searches for a non-cell-defined SSB at a frequency position corresponding to at least one synchronization grid among the multiple synchronization grids, the processing unit is used to obtain a frequency offset between a global synchronization channel number GSCN where the cell-defined SSB is located and a GSCN where the non-cell-defined SSB is located according to the MIB in the non-cell-defined SSB; The processing unit is further configured to determine the GSCN where the cell-defining SSB is located based on the frequency offset, and the communication unit is further configured to search for the cell-defining SSB on the GSCN where the cell-defining SSB is located; The processing unit is also used to obtain control information for receiving SIB1 according to the MIB in the cell definition SSB, and the communication unit is also used to receive SIB1 according to the control information, wherein the SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission.

12. The terminal device according to claim 11, characterized in that: The cell definition SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.

13. The terminal device according to claim 11, characterized in that: The control information includes a control resource set CORESET#0 and a search space#0.

14. The terminal device according to any one of claims 11 to 13, characterized in that: For different satellite beams, the frequency position for transmitting the non-cell defining SSB is the same relative to the frequency offset value of the cell defining SSB.

15. The terminal device according to any one of claims 11 to 13, characterized in that: At least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.

16. A network device, characterized in that: include: A communication unit, configured to send a synchronization signal block SSB at a frequency position corresponding to a plurality of synchronization grids, wherein the plurality of synchronization grids correspond to SSB transmissions of different satellite beams, or the plurality of synchronization grids correspond to different satellite beams; The SSB includes a cell definition SSB, a master information block MIB in the cell definition SSB is used by the terminal device to obtain control information for receiving a system information block SIB1 during an initial access process, and the SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission; or, The SSB includes a non-cell definition SSB, and the MIB in the non-cell definition SSB is used to obtain a frequency offset between a global synchronization channel number GSCN where a cell definition SSB is located and a GSCN where the non-cell definition SSB is located, and the frequency offset is used to determine the GSCN where the cell definition SSB is located; The communication unit is also used to send a cell definition SSB in the GSCN where the cell definition SSB is located. The MIB in the cell definition SSB is used by the terminal device to obtain control information for receiving SIB1 during the initial access process. The SIB1 associated with the MIB in the cell definition SSB is configured for frequency hopping transmission.

17. The network device according to claim 16, characterized in that: The cell definition SSBs sent at the frequency positions corresponding to the multiple synchronization grids correspond to the same cell.

18. The network device according to claim 16, characterized in that: The control information includes a control resource set CORESET#0 and a search space#0.

19. The network device according to any one of claims 16 to 18, characterized in that: For different satellite beams, the frequency position at which the network device sends the non-cell defining SSB has the same frequency offset value relative to the cell defining SSB.

20. The network device according to any one of claims 16 to 18, characterized in that: At least one SSB corresponding to one satellite beam is transmitted on one synchronization grid, and SSBs corresponding to different satellite beams are transmitted on different synchronization grids.

21. A terminal device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 1 to 5.

22. A network device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 6 to 10.

23. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 5.

24. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 6 to 10.

25. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 5.

26. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 6 to 10.

27. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 1 to 5.

28. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 6 to 10.

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