System information broadcast receiving method, device, equipment and storage medium

Abstract

This application relates to the technical field of satellite communications, and in particular to a method, apparatus, device, and storage medium for broadcasting and receiving system information, the method including: a base station on a satellite determining an edge beam footprint corresponding to a first cell; a process of broadcasting system information to the terrestrial coverage area by a satellite beam, broadcasting system information related to neighboring cells of the first cell and system information related to the first cell to the edge beam footprint; and a user equipment receiving the system information related to the neighboring cells at the edge beam footprint after moving from a non-edge beam footprint to the edge beam footprint. The method ensures that the user equipment acquires the system information related to the neighboring cells in a timely manner, reduces the power consumption of a satellite antenna transmitting signals, and saves channel resources.

Description

[Technical Field]

[0001] The present application relates to the technical field of satellite communications, and in particular to a method, apparatus, device and storage medium for receiving broadcast system information. [Background technology]

[0002] In a 5G communication system, system information (SI) consists of a master information block (MIB) and multiple system information blocks (SIBs). SIBs include multiple types, some of which are related to neighboring cells, i.e., neighboring cell-related SIBs, which include information related to measurements, reselection, and neighboring satellite ephemeris, such as SIB2, SIB3, SIB4, SIB5, and SIB19. The content of the "neighboring cell-related SIB" is neighboring cell information of the currently serving cell and is mainly used for mobility management. A user equipment (UE) can detect and measure neighboring cells using these neighboring cell-related SIBs to switch to a new cell before the coverage of the currently serving cell ends. In this way, a user equipment (UE) can continuously visit different cells in a mobile scenario and maintain service continuity.

[0003] In the conventional 3GPP (3rd Generation Partnership Project) standard protocol, system information is periodically broadcast on a cell-by-cell basis, meaning that the content of the system information received by all user equipment at all locations throughout the entire cell coverage range is the same. However, because the coverage range of the cells corresponding to the satellite base stations is wide, the beam footprint is large, and the overlap between cells is small, periodic broadcast of cell-specific system information is not suitable for satellite communication systems, and it significantly increases the power consumption of the satellite antenna's transmission signal, occupies the air interface link, and wastes channel resources. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present application provide a method, apparatus, device and storage medium for receiving broadcast system information, which can reduce the power consumption of a satellite antenna when transmitting a signal and save channel resources. [Means for solving the problem]

[0005] According to a first aspect, an embodiment of the present application provides a system information broadcasting method applied to a base station on a satellite, the method comprising: determining an edge beam footprint corresponding to a first cell, the first cell being a terrestrial coverage area corresponding to a base station on the satellite, the edge beam footprint being located at an edge location of the terrestrial coverage area; In the process of broadcasting system information to the terrestrial coverage area by satellite beams, the step includes broadcasting system information related to neighboring cells of the first cell and system information related to the first cell to the edge beam footprint.

[0006] In one possible embodiment, the method comprises: The method further includes a step of broadcasting system information related to the first cell and not broadcasting the system information related to neighboring cells in a non-edge beam footprint corresponding to the first cell, the non-edge beam footprint being located at a non-edge position of the terrestrial coverage area.

[0007] In the above embodiment, each cell includes an edge beam footprint and a non-edge beam footprint, and the edge beam footprint is located at the edge position of the cell. The base station on the satellite broadcasts system information of neighboring cells at the edge position of the cell, thereby ensuring that user equipment located at the edge position of the cell and that needs to reselect or switch cells can obtain the system information of neighboring cells in a timely manner. By broadcasting the system information of its own cell in the non-edge beam footprint, it can provide services to user equipment located inside the cell. The above broadcasting method reduces the power consumption of the satellite antenna, improves the utilization rate of satellite system resources, and ensures service continuity.

[0008] In one possible embodiment, the system information relating to neighboring cells comprises: at least one of NTN-specific parameters related to the neighboring cell in system information blocks SIB2, SIB3, SIB4, SIB5, and SIB19; The system information related to the first cell is SIB19 includes NTN-specific parameters related to the first cell, and system information unrelated to neighboring cells.

[0009] In the above embodiment, SIB19 broadcast in the edge beam footprint includes NTN-specific parameters related to neighboring cells, SIB2 to SIB5 are not broadcast in the non-edge beam footprint, and the broadcasted SIB19 does not include NTN-specific parameters related to neighboring cells. This setting of broadcasting different system information in different types of beam footprints can reduce power consumption of the satellite antenna and save channel resources.

[0010] In one possible embodiment, the step of broadcasting system information relating to neighboring cells of the first cell to the edge beam footprint comprises: The method includes a step of transmitting instruction information to the edge beam footprint, the instruction information causing the user equipment to determine that it is located in the edge beam footprint and instructing the user equipment to update system information with the most recent reception occasion, the instruction information being included in a short message.

[0011] In one possible embodiment, the instruction information includes system information modification information, and if the modification information is 1, it instructs to modify the broadcast control channel BCCH corresponding to the system information blocks SIB1, SIB2, SIB3, SIB4, SIB5 and SIB19.

[0012] In the above embodiment, by further transmitting a short message containing indication information at the edge beam footprint, the user equipment can determine that it is located at the edge beam footprint of the first cell and can further reacquire the system information broadcast from the base station on the satellite.

[0013] In one possible embodiment, the system information relating to neighboring cells of the first cell comprises: system information relating to all neighboring cells; system information relating to some neighboring cells; and system information relating to a first neighboring cell of the first cell.

[0014] In the above embodiment, instead of broadcasting all neighbor cell-related SIBs, neighbor cell-related SIBs that match any edge beam footprint are pre-set for different edge beam footprints so that any edge beam footprint broadcasts neighbor cell-related SIBs that match any edge beam footprint, and such a broadcasting method can save channel resources.

[0015] According to a second aspect, an embodiment of the present application provides a system information receiving method applied to a user equipment, the method comprising: a step of moving a user equipment to an edge beam footprint of a first cell, the first cell being a terrestrial coverage area corresponding to a base station on a satellite, the edge beam footprint being located at an edge location of the terrestrial coverage area; and receiving, at the edge beam footprint, system information relating to neighboring cells of the first cell broadcast from a base station on the satellite.

[0016] In the above embodiment, the user equipment updates system information of neighboring cells in the edge beam footprint and receives system information of its own cell in the non-edge beam footprint, thereby enabling the satellite to operate with low power consumption and high resource utilization, and further ensuring that user equipment located in the edge beam footprint and needing to reselect or switch cells can obtain system information of neighboring cells in a timely manner and receive continuity services provided by the satellite system.

[0017] In one possible embodiment, after moving to the edge beam footprint of the first cell, the method includes: The method further includes determining that the edge is located in the beam footprint.

[0018] In one possible embodiment, The step of determining an edge located on the beam footprint includes: The method includes a step of receiving instruction information transmitted from a base station on the satellite at the edge beam footprint, the instruction information indicating to be located at the edge beam footprint, the instruction information being included in a short message.

[0019] In one possible embodiment, after determining that the edge is located in the beam footprint, the method comprises: Further included is the step of updating the system information with the most recent received occasion.

[0020] In the above embodiment, after receiving the instruction information, the user equipment immediately triggers reacquisition of the system information broadcasted from the base station on the satellite, ensuring timely acquisition of neighbor cell-related SIBs at the cell edge position, without affecting the reselection or switching of the user equipment.

[0021] In one possible embodiment, the system information relating to neighboring cells comprises: system information relating to all neighboring cells; system information relating to some neighboring cells; and system information relating to a first neighboring cell of the first cell.

[0022] In one possible embodiment, the method comprises: if currently in an idle or inactive state, monitoring for short messages transmitted from base stations on said satellites for paging occasions corresponding to said user equipment; If currently in a connected state, the method further includes the step of monitoring for short messages sent from a base station on said satellite within any paging occasion.

[0023] In the above embodiment, different short message interception modes are set for the user equipment in different states, thereby ensuring that the user equipment can timely receive the short message containing the indication information in different states.

[0024] According to a third aspect, an embodiment of the present application provides a system information broadcasting device adapted to a base station on a satellite, the device comprising: an edge beam footprint determination module that determines an edge beam footprint corresponding to a first cell, the first cell being a terrestrial coverage area corresponding to a base station on the satellite, the edge beam footprint being located at an edge location of the terrestrial coverage area; and a broadcasting module that broadcasts system information related to neighboring cells of the first cell and system information related to the first cell to the edge beam footprint in the process of broadcasting system information to the terrestrial coverage area by satellite beams.

[0025] According to a fourth aspect, an embodiment of the present application comprises: Provided is an electronic device including at least one processor and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions, when executed by the at least one processor, cause the at least one processor to perform a method according to the first aspect or the second aspect.

[0026] According to a fifth aspect, an embodiment of the present application comprises: The present invention further provides a user device including at least one processor and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions, when executed by the at least one processor, causing the at least one processor to perform the method according to the second aspect.

[0027] According to a sixth aspect, an embodiment of the present application provides a computer storage medium having stored thereon a computer program, the computer program causing a computer to perform the method according to the first aspect or the second aspect.

[0028] According to a seventh aspect, an embodiment of the present application provides a computer program product including a computer program, which, when executed by a processor, implements the method according to the first aspect or the second aspect. [Brief explanation of the drawings]

[0029] [Figure 1]1 is a schematic diagram of cells of base stations on multiple satellites according to an embodiment of the present application; [Figure 2] 1 is a schematic diagram of an application scene of a system information broadcasting method according to an embodiment of the present application; [Figure 3] 2 is a flowchart of a system information broadcasting method according to an embodiment of the present application; [Figure 4] FIG. 1 is a schematic diagram of an edge beam footprint according to an embodiment of the present application. [Figure 5] 1 is a schematic diagram of a base station on a satellite broadcasting to user equipment according to an embodiment of the present application; [Figure 6] 1 is a schematic diagram illustrating a user equipment receiving a broadcast in a first cell according to an embodiment of the present application; [Figure 7] 1 is a schematic diagram of a system information broadcasting device according to an embodiment of the present application; [Figure 8] FIG. 1 is a schematic diagram of a user equipment according to an embodiment of the present application; [Figure 9] 1 is a schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0030] The principles and spirit of the present application will be described below with reference to some exemplary embodiments. It should be understood that these embodiments are provided merely to enable those skilled in the art to better understand and further realize the present application, and are not intended to limit the scope of the present application in any way. On the contrary, these embodiments are provided to make the present disclosure clearer and more complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] As will be apparent to those skilled in the art, the present disclosure may be realized as a system, an apparatus, a method, or a computer program product. Accordingly, the present disclosure may be realized entirely in hardware, entirely in software (including firmware, resident software, microcode, etc.), or in the form of a combination of hardware and software.

[0032] In this specification, the numbers of any elements in the drawings are illustrative rather than limiting, and any designations are used for distinction only and have no limiting meaning.

[0033] Some concepts related to the embodiments of the present application will be explained below.

[0034] Regarding system information, in a 5G communication system, the SI consists of an MIB and multiple SIBs. SIBs include multiple types, some of which are related to neighboring cells and include information related to measurements, reselection, and neighboring satellite ephemeris, such as SIB2, SIB3, SIB4, SIB5, and SIB19. These SIBs are referred to as "neighboring cell-related SIBs" in the present embodiment. The content of the "neighboring cell-related SIBs" contains system information about neighboring cells of the cell in which the user equipment is currently located, and is primarily used for mobility management. The user equipment uses these neighboring cell-related SIBs to detect and measure neighboring cells, allowing it to switch to a neighboring cell before the coverage of the currently located cell ends. In this way, the user equipment can continuously locate between different cells in a mobile scenario and maintain service continuity.

[0035] The specific contents of the neighboring cell-related SIB are as follows:

[0036] SIB2 contains cell reselection information, mainly related to the serving cell, SIB3 includes serving frequency information and information of same-frequency neighboring cells for cell reselection; SIB4 contains information on New Radio (NR) inter-frequency neighboring cells related to cell reselection, SIB5 contains information of Evolved Universal Terrestrial Radio Access (E-UTRA) neighboring cells relevant to cell reselection, SIB19 includes satellite parameters of a non-terrestrial network (NTN) serving cell and neighboring cells, such as satellite ephemeris and flight speed, etc. Neighboring cell-related SIBs in this application refer to NTN-specific parameters of neighboring cells in SIB19.

[0037] A beam footprint is a subarea in the terrestrial coverage area corresponding to a base station on a satellite. As shown in Figure 1, each "grid" in Cell 1 represents a beam footprint of Cell 1, and the satellite beam broadcasts system information in units of beam footprints.

[0038] A satellite beam is a beam transmitted by a satellite antenna to a terrestrial coverage cell.

[0039] FIG. 2 illustrates an application scenario of a system information broadcasting method according to an embodiment of the present application. The scenario includes at least one satellite (satellite 201_1, satellite 202_2, and satellite 201_N shown in FIG. 2 ) and at least one user equipment (user equipment 202_1, user equipment 202_2, and user equipment 202_N shown in FIG. 2 ). Each satellite corresponds to a respective cell (terrestrial coverage area), i.e., satellite 201_1 corresponds to cell 1, satellite 202_2 corresponds to cell 2, and satellite 201_N corresponds to cell N. The satellites broadcast system information to user equipment located on the ground, so that the user equipment can use the system information to obtain service resources provided by the satellites, such as positioning. The multiple satellites may be co-orbital satellites, low-earth orbital satellites, or high-earth orbital satellites. The user equipment may be a mobile phone or an aircraft. The embodiment of the present application is not particularly limited to the type of user equipment.

[0040] As shown in Figure 1, system information is broadcast throughout the coverage area of ​​cell 1, i.e., system messages of neighboring cells are broadcast in each beam footprint within the cell. However, if a user equipment is far from neighboring cells 2 to 7 and does not need to switch cells, nor can it receive services provided by the neighboring cells, broadcasting neighboring cell-related SIBs in the area where the user equipment is located would result in a waste of channel resources. To address this issue, an embodiment of the present application provides a system information broadcasting method applied to a satellite-based base station, the specific steps of which are shown in Figure 3, and the method includes the following steps S301 to S302:

[0041] In step S301, the edge beam footprint corresponding to the first cell is determined.

[0042] The first cell is the terrestrial coverage area corresponding to the base station on the target satellite, i.e., the cell where the user equipment is currently located, and is also referred to as the own cell in the embodiments of the present application. The edge beam footprint is located at the edge position of the terrestrial coverage area. As shown in FIG. 1, for cell 1, the edge position is the "black part", i.e., the "black grid" is the edge beam footprint of cell 1. The shape of the cell may be rectangular, regular hexagonal, circular, etc., and is not specifically limited here. Also, FIG. 1 shows that the neighboring cells of cell 1 include cells 2 to 7.

[0043] Because different satellite systems have different beam footprint sizes, different cell overlapping ranges, different paging cycles set for cells, and different user equipment measurement capabilities, the cell edge position may be the width of one beam footprint or multiple beam footprints, and different edge regions may be set for different cells of the same satellite system. For example, the edge position of cell 1 may be the width of one beam footprint or two beam footprints. Specifically, the width may be set according to actual system needs. That is, the beam footprint width should be as small as possible, provided that there is sufficient time for the user equipment to reacquire and update system information and make measurements before leaving the currently serving cell at the cell edge. The embodiments of the present application are not specifically limited.

[0044] The system information broadcasting method according to the embodiment of the present application may be applied to a high-earth orbit satellite system (geostationary satellite system) or a low-earth orbit satellite system (non-geostationary satellite system). For a non-geostationary satellite, its flight speed may be faster than the Earth's rotation speed. That is, the cell corresponding to the non-geostationary satellite may not be located at a fixed position, and the cell's movement speed may be much faster than the user equipment's movement speed. In this case, the definition of the edge beam footprint can be further optimized to FIG. 4 (black grid). That is, since the user equipment does not enter the neighboring region from the front region (i.e., the upper edge position) in the cell movement direction, in this region, system information related to the neighboring cell may not be broadcast, and only system information related to the user equipment's own cell may be broadcast.

[0045] In step S302, in the process of broadcasting system information to the terrestrial coverage area by satellite beams, system information related to neighboring cells of the first cell and system information related to the first cell are broadcast to the edge beam footprint, system information related to the first cell is broadcast to the non-edge beam footprint, and system information related to the neighboring cells is not broadcast.

[0046] In an embodiment of the present application, if a cell corresponding to a base station on a satellite has a wide coverage range, many beam footprints, and sufficient antenna resources, one antenna (i.e., a satellite beam) can be arranged to broadcast system information for each beam footprint in the cell, i.e., system information can be broadcast simultaneously for each beam footprint. However, if antenna resources are insufficient, the same antenna (i.e., a satellite beam) can be arranged to broadcast system information for multiple beam footprints, specifically, system information corresponding to each beam footprint can be broadcast sequentially in different beam footprints in a time-division manner. The embodiment of the present application does not specifically limit the broadcast order as long as it ensures that the corresponding system information is broadcast at the broadcast time corresponding to the beam footprint.

[0047] A specific example of arranging the same antenna for multiple beam footprints to broadcast system information according to an embodiment of the present application is as follows.

[0048] In a scenario where a user equipment receives system information broadcast from a satellite base station, the user equipment receives the system information once in the currently serving cell (i.e., does not receive the system information repeatedly). When the satellite base station needs to update the system information of the user equipment, it sends a system information update instruction to the user equipment by transmitting a short message. In an embodiment of the present application, when the user equipment is located in the edge beam footprint of a first cell, the satellite base station indicates that the user equipment may need to switch cells, and in this case, it needs to instruct the user equipment to update the system information. According to the current 3rd Generation Partnership Project (3GPP) protocol, when the user equipment moves from the inside of the first cell to the edge, it does not need to re-acquire the broadcasted system information. In an embodiment of the present application, the satellite base station updates the system information when the user equipment enters the edge beam footprint based on a short message instruction. That is, the satellite base station transmits a short message including instruction information to the edge beam footprint via the satellite beam, and the instruction information instructs the user equipment to update the system information.

[0049] In the existing 3GPP, a base station can transmit a short message on a physical downlink control channel via Downlink Control Information (DCI1_0) scrambled by a Paging Radio Network Temporary Identifier (P-RNTI). Indication information of multiple bytes (bits) in the short message indicates different procedures. For example, bit 1 can indicate a system information change. The system information change defined in 3GPP must take effect within the next modification period. The modification period is set by a modification period coefficient (modification period coefficient) and a default paging cycle (default paging cycle) in SIB1, and the configurable interval is 640 ms to 40.96 s. Because non-geostationary satellites move quickly, waiting for the next modification period before updating can result in the user equipment leaving the edge region, potentially preventing the system information from being updated in a timely manner. Based on this, in the embodiment of the present application, the instruction information in the short message is extended, i.e., any one of bits 5 to 8 is used, and in the embodiment of the present application, bit 5 is selected as the instruction information. This instructs the user equipment to reacquire the system information broadcast from the base station on the satellite at the most recent reception occasion in the edge beam footprint, i.e., to update the system information immediately after receiving it. In the prior art, it was necessary to wait for the next update period before updating the system message, but since a faster change is required in response to the system information broadcast in the edge beam footprint, in this case the user equipment must update the system message immediately. The instruction bits extended in the embodiment of the present application are shown in Table 1.

[0050] [Table 1]

[0051] The satellite beam instructs the user equipment to update system information using a short message at each paging occasion in the edge beam footprint, i.e., the satellite beam transmits the short message only in the edge beam footprint, and bit 5 in the short message is 1 (instruction information).

[0052] According to an embodiment of the present application, a system information broadcasting method applied to a base station on a satellite broadcasts neighboring cell-related SIBs in the edge area of ​​the cell and broadcasts the own cell-related SIBs in the non-edge area, thereby reducing the power consumption of the satellite when transmitting signals and saving channel resources.

[0053] Based on the same inventive idea, an embodiment of the present application further provides a system information receiving method applied to a user equipment, the method comprising: The method includes a step of a user equipment moving from a non-edge beam footprint of a first cell to an edge beam footprint of the first cell, and a step of receiving, at the edge beam footprint, system information relating to neighboring cells broadcast from a base station on a satellite.

[0054] The first cell is a terrestrial coverage area corresponding to a base station on the satellite, and the base station on the satellite can broadcast system information related to neighboring cells to an edge beam footprint using a satellite beam, and the edge beam footprint is located at an edge position of the terrestrial coverage area. Specifically, the step of broadcasting system information related to neighboring cells to the edge beam footprint using a satellite beam is the same as described above in S301 to S302, and therefore will not be described here.

[0055] When a user equipment moves from a non-edge beam footprint to an edge beam footprint, the user equipment may enter the coverage range of a neighboring cell, indicating that cell reselection in an idle or inactive state or cell switching in a connected state may occur to ensure service continuity. Because a base station on a satellite transmits a short message containing indication information to the edge beam footprint, the user equipment determines that it has entered the edge beam footprint upon receiving the short message. After receiving system information in the most recent reception occasion, the user equipment immediately triggers a system information update. For example, when the user equipment moves from the interior of a first cell to the edge area, the user equipment receives a short message with bit 5 set to 1. At this time, the user equipment immediately triggers a system information update, i.e., updates the system information using system information related to the neighboring cell. Then, the user equipment measures the neighboring cell using the updated system information. If the signal strength of the neighboring cell is greater than that of the first cell, this indicates that the user equipment is likely to move to the neighboring cell, and the user equipment performs cell reselection or cell switching. The embodiments of the present application do not specifically limit the conditions for cell reselection or cell switching.

[0056] In one possible embodiment, the manner in which the user equipment receives the short message in different states is different, as shown in the following embodiment:

[0057] (1) The user equipment is in an idle or inactive state. The user equipment monitors short messages transmitted from a base station on a satellite via a satellite beam at a target paging occasion corresponding to the user equipment. When the user equipment is in an idle state or an inactive state, it does not always read the short message. In order to obtain the short message in a timely manner, the user equipment reads the short message at the corresponding paging occasion (i.e., at a non-continuous paging occasion) to determine whether it contains indication information.

[0058] (2) The user device is in a connected state. The user equipment monitors short messages transmitted from base stations on the satellites via beams at any paging occasion. When the user equipment is in a connected state, the user equipment selects at least one paging occasion in each default paging cycle to monitor the short message and determine whether it contains indication information.

[0059] When a user equipment first enters a non-edge beam footprint (e.g., powers on in a cell) and then moves from the non-edge beam footprint to an edge beam footprint, it acquires complete system information, including neighbor cell information, at the edge beam footprint again according to the instruction information in the short message. When the user equipment first enters an edge beam footprint and then moves from the edge beam footprint to a non-edge beam footprint, the user equipment does not update the system information because it has already received system information at the edge beam footprint (i.e., system information related to neighbor cells and system information of the first cell). When the user equipment passes through an edge beam footprint -> non-edge beam footprint -> edge beam footprint, it receives a short message including instruction information multiple times and does not need to receive the neighbor cell system information again unless the previously received neighbor cell information has expired. Also, for example, if the user equipment repeatedly receives a short message with bit 5 set to 1 from the same cell and the neighbor cell information has not expired, it may update the neighbor cell-related SIB only once, thereby saving power consumption of the user equipment.

[0060] According to the current 3GPP protocol specification, the user equipment cannot know when it has entered the edge region of a cell, and the user equipment cannot change the beam footprint in the same cell to receive the system information again. The embodiment of the present application provides a solution to instruct the user equipment to timely update the system information by extending the short message, thereby ensuring that the user equipment can timely update the neighbor cell-related SIB at the edge of the cell.

[0061] The specific procedure by which a base station on a satellite broadcasts information to user equipment will be described in detail below with reference to FIG.

[0062] In step 1, as shown in FIG. 6, the user equipment is inside cell 1 (including scenes in which the user equipment is located in cell 1 in various forms such as cell selection, reselection, switching, or redirection).

[0063] In step 2, the user equipment receives broadcast information in a non-edge beam footprint. The system information transmitted from the base station on the satellite includes MIB and SIB1, and the scheduling information (si-SchedulingInfo) in SIB1 schedules only SIB19, and the moving speed of the cell corresponding to the satellite is faster than that of the user equipment.

[0064] An example of si-SchedulingInfo in SIB1 is shown below. System Information Scheduling Information v1700 Extension (SI-SchedulingInfo-v1700) Scheduling Information List 2 (schedulingInfoList2-r17) Item-0 Scheduling Information 2 (schedulingInfo2-r17) The broadcast status of the system information is broadcasting (si-BroadcastStatus-r17=broadcasting) The system information broadcast period is 64 frames (si-Periodicity-r17=rf64) System Information Block Mapping Information (sib-MappingInfo-r17) Item-0 System Information Block Type Information v1700 Extension (SIB-TypeInfo-v1700) The type is sib19 (type1-r17=sibType19) The numeric tag is 0 (valueTag-r17=0) SIB19 contains NTN-specific parameters related to the first cell (ntn-Config-r17) and does not contain NTN-specific parameters corresponding to neighboring cells (ntn-NeighCellConfigList-r17).

[0065] In step 3, due to satellite movement or user equipment movement, the user equipment begins to enter the edge of Cell 1 (black area).

[0066] In step 4, the base station on the satellite continuously transmits a short message containing instruction information in the edge beam footprint of the cell, and in the present embodiment, the extended bit 5 (systemInfoModificationForMobility) is set to 1. The system information of cell 3 broadcast by the base station on the satellite in the edge region includes MIB, SIB1.

[0067] The scheduling information (si-SchedulingInfo) of the system information in SIB1 schedules SIB2 to SIB5 and SIB19, and is, for example, as follows: System Information Scheduling Information (si-SchedulingInfo) Scheduling information list (schedulingInfoList) Item-0 Scheduling information (SchedulingInfo) The broadcast status of the system information is broadcasting (si-BroadcastStatus=broadcasting) The system information broadcast period is 32 frames (si-Periodicity=rf32) System Information Block Mapping Information (sib-MappingInfo) Item-0 System Information Block Type (SIB-Typelnfo) The type is sib2 (type=sibType2) The numeric tag is 0 (valueTag=0) Item-1 Scheduling information (SchedulingInfo) The broadcast status of the system information is broadcasting (si-BroadcastStatus=broadcasting) The system information broadcast period is 64 frames (si-Periodicity=rf64) System Information Block Mapping Information (sib-MappingInfo) Item-0 System Information Block Type (SIB-TypeInfo) The type is sib3 (type=sibType3) The numeric tag is 0 (valueTag=0) Item-2 Scheduling information (SchedulingInfo) The broadcast status of the system information is broadcasting (si-BroadcastStatus=broadcasting) The system information broadcast period is 64 frames (si-Periodicity=rf64) System Information Block Mapping Information (sib-MappingInfo) Item-0 System Information Block Type (SIB-TypeInfo) The type is sib4 (type=sibType4) The numeric tag is 0 (valueTag=0) Item-3 Scheduling information (SchedulingInfo) The broadcast status of the system information is broadcasting (si-BroadcastStatus=broadcasting) The system information broadcast period is 64 frames (si-Periodicity=rf64) System Information Block Mapping Information (sib-MappingInfo) Item-0 System Information Block Type (SIB-TypeInfo) The type is sib5 (type=sibType5) The numeric tag is 0 (valueTag=0) System Information v1700 Scheduling Information (SI-SchedulingInfo-v1700) Scheduling Information List 2 (schedulingInfoList2-r17) Item-0 Scheduling Information 2 (SchedulingInfo2-r17) The broadcast status of the system information is broadcasting (si-BroadcastStatus-r17=broadcasting) The system information broadcast period is 64 frames (si-Periodicity-r17=rf64) System Information Block Mapping Information (sib-MappingInfo-r17) Item-0 System Information Block Type Information v1700 Extension (SIB-TypeInfo-v1700) The type is sib19 (type1-r17=sibType19) The numeric tag is 1 (valueTag-r17=1) SIB19 includes NTN-specific parameters associated with the first cell and NTN-specific parameters corresponding to said neighboring cells.

[0068] In step 5, after receiving the short message containing the instruction information, the user equipment immediately updates the system information of cell 3 using the received system information of cell 3, and obtains the measurement configuration of cell 3 and the ephemeris setting of the base station on the satellite corresponding to cell 3.

[0069] In step 6, the user equipment performs measurements, reselects or switches based on 3GPP protocols to change cell 1 to cell 3.

[0070] Based on the same inventive idea, an embodiment of the present application further provides a system information broadcasting device applied to a base station on a satellite, as shown in FIG. 7, the device comprises: an edge beam footprint determination module 701 that determines an edge beam footprint corresponding to a first cell, the first cell being a terrestrial coverage area corresponding to a base station on the satellite, the edge beam footprint being located at an edge location of the terrestrial coverage area; and a broadcasting module 702 that broadcasts system information related to neighboring cells of the first cell and system information related to the first cell to the edge beam footprint in the process of broadcasting system information to the terrestrial coverage area by satellite beams.

[0071] In one possible embodiment, the broadcast module 702 includes: The antenna is configured to broadcast system information related to a first cell and not broadcast the system information related to neighboring cells in a non-edge beam footprint corresponding to the first cell, the non-edge beam footprint being located at a non-edge position of the terrestrial coverage area.

[0072] In one possible embodiment, the broadcasting module 702 broadcasts NTN-specific parameters related to the neighboring cells in system information blocks SIB2, SIB3, SIB4, SIB5, and SIB19; It is configured to broadcast an SIB19 containing NTN-specific parameters related to the first cell and system information unrelated to neighboring cells.

[0073] In one possible embodiment, the broadcast module 702 includes: The method is configured to transmit instruction information to the edge beam footprint, the instruction information instructing the user equipment to determine that it is located in the edge beam footprint and to update system information with the latest reception occasion, the instruction information being included in a short message; The instruction information includes system information modification information, and if the modification information is 1, it indicates to modify the broadcast control channel BCCH corresponding to the system information blocks SIB1, SIB2, SIB3, SIB4, SIB5 and SIB19.

[0074] In one possible embodiment, the broadcast module 702 includes: system information relating to all neighboring cells; system information relating to some neighboring cells; and system information associated with a first neighboring cell of the first cell.

[0075] Based on the same inventive idea, the embodiment of the present application is: The present invention further provides a user equipment including at least one processor and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions, when executed by the at least one processor, cause the at least one processor to perform the system information reception method applied to the user equipment in the above embodiment.

[0076] 8, the user equipment 800 includes a processor 801, a memory 802, and a communication interface 803. The processor 801, the memory 802, and the communication interface 803 are connected to each other via a bus 804.

[0077] The processor 801 is configured to read and execute instructions in the memory 802, so that the at least one processor can perform the system information reception method applied to the user equipment of the above embodiment.

[0078] The memory 802 is configured to store various instructions and programs of the system information receiving method applied to the user equipment according to the above embodiment.

[0079] Based on the same inventive idea, the embodiment of the present application is: The present invention further provides an electronic device including at least one processor and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions, when executed by the at least one processor, causing the at least one processor to perform the system information broadcasting method applied to a base station on a satellite in the above embodiment.

[0080] 9, the electronic device 900 includes a processor 901, a memory 902, and a communication interface 903. The processor 901, the memory 902, and the communication interface 903 are connected to one another via a bus 904.

[0081] The processor 901 is configured to read and execute instructions in the memory 902, so that the at least one processor can execute the system information broadcasting method applied to base stations and user equipment on a satellite according to the above embodiment.

[0082] The memory 902 is configured to store various instructions and programs of the system information broadcasting method applied to the base stations and user equipments on the satellite according to the above embodiment.

[0083] The buses 804 and 904 may be peripheral component interconnect (PCI) buses, extended industry standard architecture (EISA) buses, etc. The buses may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used to represent a bus in Figures 8 and 9, but this does not mean that there is only one bus or only one type of bus.

[0084] The processors 801 and 901 may be a central processing unit (CPU), a network processor (NP), a graphics processing unit (GPU), or any combination of a CPU, NP, and GPU. They may also be hardware chips. The hardware chips may be application-specific integrated circuits (ASIC), programmable logic devices (PLD), or combinations thereof. The PLDs may be complex programmable logic devices (CPLD), field-programmable gate arrays (FPGA), generic array logic (GAL), or combinations thereof.

[0085] An embodiment of the present application further provides a computer program product including a computer program, which, when executed by a processor, realizes any of the above-described system information broadcasting methods or any of the above-described system information receiving methods. For example, all or part of the methods herein can be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part may be realized in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the procedures or functions of the present application are performed. The computer may be a general-purpose computer, a special-purpose computer, a computer network, network equipment, user equipment, core network equipment, OAM, or another programmable device.

[0086] Preferably, the computer-readable storage medium may be one implementation form of the above computer program product, i.e., an embodiment of the present application further provides a computer-readable storage medium containing a computer program, which, when executed by a processor, realizes any of the above system information broadcasting methods or any of the system information receiving methods.

[0087] For example, a computer program or instructions may be stored on a computer-readable storage medium or transmitted from one computer-readable storage medium to another, e.g., a computer program or instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless connection. A computer-readable storage medium may be any available medium accessible by a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium such as a floppy disk, hard disk, or magnetic tape, an optical medium such as a digital video disk, or a semiconductor medium such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile storage media.

[0088] Those skilled in the art will appreciate that the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, the present application may take the form of a hardware-only embodiment, a software-only embodiment, or an embodiment using a combination of software and hardware. The present application may also take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

[0089] The present application is described with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each process and / or each block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or a processor of another programmable data processing device to create a machine, such that the instructions, when executed by the processor of the computer or another programmable data processing device, create an apparatus for performing the specific functions in one or more flows in the flowcharts and / or in one or more blocks in the block diagrams.

[0090] These computer program instructions may be stored in a computer-readable memory that can direct a computer or another programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-readable memory generate an artifact that includes an instruction apparatus that performs particular functions in one or more flows in the flowcharts and / or in one or more blocks in the block diagrams.

[0091] These computer program instructions may be loaded into a computer or other programmable data processing device, resulting in a series of operations and steps being performed on the computer or other programmable device, thereby creating a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing a specific function in one or more flows in the flowcharts and / or in one or more blocks in the block diagrams. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include these modifications and variations, provided they fall within the scope of the claims and their equivalents.

Claims

1. A system information broadcasting method applied to a base station on a satellite, comprising: determining an edge beam footprint corresponding to a first cell, the first cell being a terrestrial coverage area corresponding to a base station on the satellite, the edge beam footprint being located at an edge location of the terrestrial coverage area; In a process of broadcasting system information to the terrestrial coverage area by a satellite beam, the system information broadcasting method comprises a step of broadcasting system information related to neighboring cells of the first cell and system information related to the first cell to the edge beam footprint.

2. 2. The method of claim 1, further comprising: broadcasting system information related to a first cell and not broadcasting the system information related to neighboring cells in a non-edge beam footprint corresponding to the first cell, the non-edge beam footprint being located at a non-edge position of the terrestrial coverage area.

3. The system information relating to neighboring cells includes: at least one of NTN-specific parameters related to the neighboring cells in system information blocks SIB2, SIB3, SIB4, SIB5, and SIB19; The system information related to the first cell is 2. The method of claim 1, further comprising: SIB19 including NTN-specific parameters related to the first cell and system information unrelated to neighboring cells.

4. The step of broadcasting system information related to neighboring cells of the first cell to the edge beam footprint includes:

2. The method of claim 1, further comprising: transmitting instruction information to the edge beam footprint, the instruction information causing a user equipment to determine that it is located in the edge beam footprint and instructing the user equipment to update system information with the most recent reception occasion.

5. the instruction information includes system information modification information; 5. The method of claim 4, wherein if the modification information is 1, it indicates modifying the broadcast control channel BCCH corresponding to system information blocks SIB1, SIB2, SIB3, SIB4, SIB5, and SIB19.

6. The method of claim 4 , wherein the instruction information is included in a short message.

7. The system information related to neighboring cells of the first cell includes:

2. The method of claim 1, including system information relating to all neighboring cells.

8. The system information related to neighboring cells of the first cell includes:

2. The method of claim 1, including system information relating to some neighboring cells.

9. The system information relating to neighboring cells includes:

10. The method of claim 1, further comprising system information relating to a first neighboring cell.

10. A system information receiving method applied to a user equipment, comprising: a step of moving a user equipment from a non-edge beam footprint of a first cell to an edge beam footprint of the first cell, the first cell being a terrestrial coverage area corresponding to a base station on a satellite, the edge beam footprint being located at an edge location of the terrestrial coverage area; and receiving system information related to neighboring cells of the first cell broadcast from a base station on the satellite at the edge beam footprint.

11. After moving to the edge beam footprint of the first cell, the method includes: The method of claim 10 further comprising determining that the edge is located in a beam footprint.

12. The step of determining an edge located on the beam footprint includes:

12. The method of claim 11, comprising receiving, at an edge beam footprint, indication information transmitted from a base station on a satellite, the indication information indicating that user equipment is located at the edge beam footprint.

13. After determining that the edge is located in the beam footprint, the method includes:

13. The method of claim 12, further comprising updating system information with the most recent received occasion.

14. The system information related to the neighboring cells includes: system information relating to all neighboring cells; system information relating to some neighboring cells; and system information relating to a first neighboring cell of the first cell.

15. if currently in an idle or inactive state, monitoring for short messages transmitted from base stations on said satellites for paging occasions corresponding to said user equipment; 11. The method of claim 10, further comprising the step of: if currently connected, monitoring for short messages sent from a base station on said satellite within any paging occasions.

16. A system information broadcasting device applied to a base station on a satellite, comprising: an edge beam footprint determination module that determines an edge beam footprint corresponding to a first cell, the first cell being a terrestrial coverage area corresponding to a base station on the satellite, the edge beam footprint located at an edge location of the terrestrial coverage area; a broadcasting module that broadcasts system information related to neighboring cells of the first cell and system information related to the first cell to the edge beam footprint in a process of broadcasting system information to the terrestrial coverage area by a satellite beam.

17. 10. An electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions, when executed by the at least one processor, causing the at least one processor to perform the method of any one of claims 1 to 9.

18. 16. A user equipment comprising: at least one processor; and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions, when executed by the at least one processor, causing the at least one processor to perform the method of any one of claims 10 to 15.

19. A computer storage medium storing a computer program for causing a computer to execute the method according to any one of claims 1 to 9 or 10 to 15.

20. A computer program product comprising a computer program, characterized in that the computer program implements the method according to claims 1 to 9 or 10 to 15 when the computer program is executed by a processor.

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