System information broadcasting reception method, apparatus, 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] This application relates to the technical field of satellite communication, and particularly to a method, apparatus, device, and storage medium for receiving and transmitting system information.

Background Art

[0002] In a 5G communication system, system information (SI) consists of a master information block (MIB) and a plurality of system information blocks (SIBs). The SIBs include multiple types, some of which are related to adjacent cells, that is, adjacent cell-related SIBs. The adjacent cell-related SIBs include information related to measurements, reselections, and adjacent satellite ephemerides. For example, they are SIB2, SIB3, SIB4, SIB5, and SIB19, etc. The content of the "adjacent cell-related SIB" is the adjacent cell information of the current serving cell, and is mainly used for mobility management. User equipment detects and measures adjacent cells based on these adjacent cell-related SIBs, and switches to a new cell before the coverage of the current serving cell ends. In this way, user equipment can continuously camp on different cells in a mobile scenario and maintain service continuity.

[0003] In the conventional 3rd Generation Partnership Project (3GPP) standard protocol, system information is broadcast periodically in units of cells. That is, within the entire coverage area of a cell, the content of the system information received by all user equipment at all positions is the same. However, the coverage area of the cell corresponding to the base station on the satellite is wide, there are many beam footprints, and the overlapping range between cells is small. The periodic broadcast of cell-specific system information is not suitable for the satellite communication system, which greatly increases the power consumption of the transmission signal of the satellite antenna, occupies the radio interface link, and wastes channel resources.

Summary of the Invention

[0004] Embodiments of the present invention provide a method, apparatus, device, and storage medium for receiving broadcast information of system information that can reduce the power consumption of a satellite antenna when transmitting signals and conserve channel resources. [Means for solving the problem]

[0005] According to the first aspect, an embodiment of the present application provides a system information broadcasting method applicable to a base station on a satellite, the method being: A step of determining the edge beam footprint corresponding to a first cell, wherein the first cell is a ground coverage area corresponding to a base station on the satellite, and the edge beam footprint is located at the edge of the ground coverage area. The process of broadcasting system information to the ground coverage area by satellite beam includes the step of broadcasting system information related to adjacent 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 is The step of broadcasting system information related to a first cell to a non-edge beam footprint corresponding to a first cell, but not broadcasting system information related to an adjacent cell, the non-edge beam footprint being located at a non-edge position in the ground coverage area.

[0007] In the above embodiment, each cell includes an edge beam footprint and a non-edge beam footprint, the edge beam footprint being located at the edge of the cell, and the base station on the satellite can broadcast system information of adjacent cells at the edge of the cell to ensure that user equipment located at the edge of the cell and that needs to reselect or switch cells can obtain system information of adjacent cells in a timely manner, and can provide services to user equipment located inside the cell by broadcasting its own cell's system information at the non-edge beam footprint, and the above broadcasting method reduces power consumption of the satellite antenna, improves the utilization rate of satellite system resources, and ensures the continuity of service.

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

[0009] In the above embodiment, SIB19 broadcast on the edge beam footprint includes NTN-specific parameters related to adjacent cells, while SIB2-5 are not broadcast on the non-edge beam footprint, and the broadcasted SIB19 does not include NTN-specific parameters related to adjacent cells. This configuration, which broadcasts different system information on different types of beam footprints, can reduce the power consumption of the satellite antenna and conserve channel resources.

[0010] In one possible embodiment, the step of broadcasting system information relating to adjacent cells of the first cell to the edge beam footprint is: The step of transmitting instruction information to the edge beam footprint, wherein the instruction information instructs the user device to determine to be located on the edge beam footprint and to update system information in the most recent received occultation, and the instruction information is included in a short message.

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

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

[0013] In one possible embodiment, the system information relating to the adjacent cells of the first cell is: System information related to all adjacent cells, System information related to some adjacent cells, The system information includes at least one of the following: system information relating to the first adjacent cell of the first cell.

[0014] In the above embodiment, instead of broadcasting all adjacent cell-related SIBs, the matching adjacent cells are pre-configured for different edge beam footprints so that adjacent cell-related SIBs that match a particular edge beam footprint are broadcast for any of the edge beam footprints. This broadcasting method can conserve channel resources.

[0015] According to a second aspect, an embodiment of the present application provides a method for receiving system information applied to user equipment, the method being: A step of moving user equipment to the edge beam footprint of a first cell, wherein the first cell is a ground coverage area corresponding to a base station on a satellite, and the edge beam footprint is located at the edge of the ground coverage area. The step includes receiving, in the edge beam footprint, system information relating to adjacent cells of the first cell broadcast from a base station on the satellite.

[0016] In the above embodiment, user equipment updates system information of adjacent cells in the edge beam footprint and receives system information of its own cell in the non-edge beam footprint, thereby ensuring that the satellite operates with low power consumption and high resource utilization, and further ensuring that user equipment located in the edge beam footprint and which needs to reselect or switch cells can obtain system information of adjacent 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 This further includes the step of determining where to position the edge beam footprint.

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

[0019] In one possible embodiment, after determining to be located on the edge beam footprint, the method This further includes a step to update system information with the most recent received occupancy.

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

[0021] In one possible embodiment, the system information related to the neighboring cells is system information related to all neighboring cells, system information related to some neighboring cells, and at least one of the system information related to the first neighboring cell of the first cell.

[0022] In one possible embodiment, the method further includes when currently in the idle state or the inactive state, monitoring the short message transmitted from the base station on the satellite in the paging occasion corresponding to the user equipment; when currently in the connected state, monitoring the short message transmitted from the base station on the satellite within any paging occasion.

[0023] In the above embodiment, by setting different short message eavesdropping methods for user equipment in different states, it is ensured that the user equipment can timely receive short messages containing instruction information in different states.

[0024] According to a third aspect, the embodiments of the present application provide a system information broadcast device applied to a base station on a satellite, and the device includes an edge beam footprint determination module for determining an edge beam footprint corresponding to a first cell, where the first cell is a ground coverage area corresponding to the base station on the satellite, and the edge beam footprint is located at the edge position of the ground coverage area; The system includes a broadcast module that, in the process of broadcasting system information to the ground coverage area by satellite beam, broadcasts system information related to adjacent cells of the first cell and system information related to the first cell to the edge beam footprint.

[0025] According to the fourth aspect, the embodiments of the present application are as follows: The present invention provides an electronic device comprising at least one processor and a memory communicably connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and when the instructions are executed by the at least one processor, the instructions cause the at least one processor to perform the method according to the first or second embodiment described above.

[0026] According to the fifth aspect, the embodiments of the present application are as follows: The present invention further provides a user device comprising at least one processor and a memory communicably 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 method according to the second embodiment.

[0027] According to the sixth aspect, an embodiment of the present application provides a computer storage medium in which a computer program is stored, the computer program causing a computer to execute the method described in the first or second aspect.

[0028] According to the seventh aspect, an embodiment of the present application provides a computer program product including a computer program, wherein when the computer program is executed by a processor, the method described in the first or second aspect is realized. [Brief explanation of the drawing]

[0029] [Figure 1]This is a schematic diagram of each cell of multiple base stations on satellites according to an embodiment of the present invention. [Figure 2] This is a schematic diagram illustrating an application scenario of the system information broadcasting method according to an embodiment of the present invention. [Figure 3] This is a flowchart of the system information broadcasting method according to an embodiment of the present invention. [Figure 4] This is a schematic diagram of the edge beam footprint according to an embodiment of the present invention. [Figure 5] This is a schematic diagram showing a satellite base station broadcasting to user equipment according to an embodiment of the present invention. [Figure 6] This is a schematic diagram showing a user device according to an embodiment of the present application receiving a broadcast in the first cell. [Figure 7] This is a schematic diagram of a system information broadcasting device according to an embodiment of the present invention. [Figure 8] This is a schematic diagram of a user device according to an embodiment of the present invention. [Figure 9] This is a schematic diagram of an electronic device according to an embodiment of the present application. [Modes for carrying out the invention]

[0030] The principles and spirit of the present application will be described below with reference to several exemplary embodiments. These embodiments are provided solely to enable those skilled in the art to better understand and further implement the present application, and are not intended to limit the scope of the application in any way. Conversely, these embodiments are provided to make the disclosure clearer and more complete, and to fully convey the scope of the disclosure to those skilled in the art.

[0031] As will be apparent to those skilled in the art, embodiments of the present invention can be implemented as systems, apparatus, methods, or computer program products. Accordingly, the present disclosure can be implemented specifically as complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0032] In this specification, any number of elements in the drawings is illustrative and not restrictive, and any naming is used for distinction only and has no restrictive meaning.

[0033] The following describes some of the concepts related to the embodiments of this application.

[0034] Regarding system information, in a 5G communication system, the System Information (SI) consists of a Group of Information (MIB) and multiple SIBs. The SIBs include multiple types, some of which relate to adjacent cells and include information related to measurement, reselection, and adjacent satellite ephemeris, such as SIB2, SIB3, SIB4, SIB5, and SIB19, and are referred to as "adjacent cell-related SIBs" in the embodiments of this application. The content of the "adjacent cell-related SIBs" is the system information of the adjacent cells of the cell in which the user device is currently located, and is mainly used for mobility management. By detecting and measuring adjacent cells using these adjacent cell-related SIBs, the user device switches to an adjacent cell before the coverage of the current cell ends. In this way, the user device can remain continuously located between different cells in a mobile scenario, maintaining the continuity of service.

[0035] The specific details of the adjacent cell-related SIB are as follows:

[0036] SIB2 contains cell reselection information and is primarily related to serving cells. SIB3 includes serving frequency information and information on adjacent cells of the same frequency for cell reselection. SIB4 includes information on New Radio (NR) different frequency adjacent cells related to cell reselection. SIB5 includes information on adjacent cells of Evolved Universal Terrestrial Radio Access (E-UTRA) related to cell reselection. SIB19 includes satellite parameters of a non-terrestrial network (NTN) serving cell and adjacent cells, such as satellite ephemeris and flight speed. The adjacent cell-related SIB in this application refers to NTN-specific parameters of the adjacent cell in SIB19.

[0037] A beam footprint is a sub-area within the ground coverage area corresponding to a base station on a satellite. As shown in Figure 1, each "grid" in cell 1 represents the 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 ground-based coverage cell.

[0039] Figure 2 shows an application scene of the system information broadcasting method according to an embodiment of the present application, which includes at least one satellite (satellites 201_1, 202_2, and 201_N shown in Figure 2) and at least one user device (user device 202_1, 202_2, and 202_N shown in Figure 2). Each satellite corresponds to a cell (ground 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 the user device located on the ground, thereby enabling the user device to use the system information to obtain service resources provided from the satellite, such as positioning. The multiple satellites are in the same orbit and may be low-Earth orbit satellites or high-Earth orbit satellites. The user device may be a mobile phone or an aircraft, and the embodiment of the present application is not particularly limited to the type of user device.

[0040] As shown in Figure 1, system information is broadcast across the entire coverage area of ​​cell 1, that is, system messages from adjacent cells are broadcast in each beam footprint within the cell. However, if the user equipment is far from adjacent cells 2 to 7 and does not need to switch cells, nor can it receive services provided by adjacent cells, then broadcasting adjacent cell-related SIBs in the area where the user equipment is located would result in a waste of channel resources. Based on this problem, an embodiment of the present invention provides a system information broadcasting method applicable to a base station on a satellite, the specific procedure of which is 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 ground coverage area corresponding to the base station on the target satellite, i.e., the cell in which the user equipment is currently located, and in the embodiment of this application, it is also called the self-cell. The edge beam footprint is located at the edge position of the ground coverage area, and as shown in Figure 1, for cell 1, the edge position is the "black portion", i.e., the "black grid" is the edge beam footprint of cell 1. The shape of the cell may be a rectangle, a regular hexagon, a circle, etc., and is not specifically limited here, and Figure 1 shows that the adjacent cells to cell 1 include cells 2 to 7.

[0043] Because different satellite systems have different beam footprint sizes, different cell overlap ranges, different paging periods set for cells, and different measurement capabilities for user equipment, the edge position of a cell may be the width of one beam footprint or the width of multiple beam footprints, and different edge regions may be set for different cells in the same satellite system. For example, the edge position of cell 1 may be the width of one beam footprint or the width of two beam footprints. Specifically, it can be set according to the demands of the actual system, that is, the smallest possible beam footprint width is defined, provided that the user equipment has enough time to reacquire and update system information and take measurements before leaving the current cell at the edge of the cell, and the embodiments of this application are not specifically limited.

[0044] The system information broadcasting method according to the embodiment of the present invention may be applied to high-orbit satellite systems (geostationary satellite systems) or low-orbit satellite systems (non-geostationary satellite systems). For non-geostationary satellites, their flight speed may be greater than the Earth's rotation speed, meaning that the cell corresponding to the non-geostationary satellite may not be located in a fixed position, and the cell's movement speed may be much higher than the user equipment's movement speed. In this case, the definition for edge beam footprint can be further optimized as shown in Figure 4 (black grid). In other words, since the user equipment does not enter the adjacent area from the front area in the cell movement direction (i.e., the upper edge position), in this area, system information related to adjacent cells may not be broadcast, and only system information related to its own cell may be broadcast.

[0045] In step S302, during the process of broadcasting system information to the ground coverage area by satellite beam, system information related to adjacent 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 adjacent cells is not broadcast.

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

[0047] A specific embodiment of the present invention, in which the same antenna is placed for multiple beam footprints in order to broadcast system information, is as follows:

[0048] In a scenario where user equipment receives system information broadcast from a base station on a satellite, the user equipment receives the system information once in its current cell, i.e., it does not receive the system information repeatedly. If the base station on the satellite needs to update the system information, it sends an instruction to the user equipment to update the system information by sending a short message. In the embodiment of the present invention, it is shown that when user equipment is located in the edge beam footprint of a first cell, the user equipment may need to switch cells, and at this time, it is necessary to instruct the user equipment to update the system information. According to the current 3rd Generation Partnership Project (3GPP) protocol, when user equipment moves from inside the first cell to the edge, it is not necessary to acquire the broadcasted system information again. The embodiment of the present invention provides an embodiment in which the user equipment updates the system information when it enters the edge beam footprint based on a short message instruction, i.e., the satellite beam transmits a short message containing instruction information to the edge beam footprint, and the instruction information instructs the user equipment to update the system information.

[0049] In existing 3GPP configurations, base stations can transmit short messages on the physical downlink control channel via Downlink Control Information (DCI1_0) scrambled with a Paging Radio Network Temporary Identifier (P-RNTI). Multiple bytes (bits) within a short message indicate different procedures. For example, bit 1 can indicate a change in system information, but changes to system information as defined by 3GPP must take effect within the next modification period, which is set by the modification period coefficient and default paging cycle in SIB1, with a configurable range of 640ms to 40.96s. Due to the rapid movement of non-geostationary satellites, waiting until the next modification period to update could result in user equipment having moved away from the edge region, potentially preventing timely system information updates. Based on this, in the embodiment of the present application, the instruction information in the short message is extended, that is, one of bits 5 to 8 is used, and in the embodiment of the present application, bit 5 is selected as the instruction information. The user device is instructed to reacquire the system information broadcast from the base station on the satellite in the most recent reception occultation in the edge beam footprint, that is, to update the system information immediately after receiving it. In the prior art, it is necessary to wait for the next change cycle before updating the system message, but since it is necessary to change the system information broadcast in the edge beam footprint more quickly, the user device needs to update the system message immediately here. The instruction bits extended in the embodiment of the present application are shown in Table 1.

[0050] [Table 1]

[0051] The satellite beam instructs user equipment to update system information using short messages at each paging occasion, specifically using the edge beam footprint. In other words, the satellite beam transmits short messages only at the edge beam footprint, with bit 5 in the short message being 1 (instruction information).

[0052] According to the system information broadcasting method applicable to a base station on a satellite, as described in the embodiment of the present invention, adjacent cell-related SIBs are broadcast in the edge region of the cell, and SIBs related to the own cell are broadcast in the non-edge region, thereby reducing the power consumption of the satellite when transmitting signals and saving channel resources.

[0053] Based on the same inventive concept, embodiments of the present application further provide a method for receiving system information applicable to user equipment, the method being: The process includes the steps of: moving user equipment from the non-edge beam footprint of the first cell to the edge beam footprint of the first cell; and receiving system information related to an adjacent cell broadcast from a base station on the satellite at the edge beam footprint.

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

[0055] When user equipment moves from a non-edge beam footprint to an edge beam footprint, it may enter the coverage area of ​​an adjacent cell, indicating that cell reselection in an idle or inactive state or cell switching in a connected state may occur to ensure continuity of service. Because a base station on the satellite sends a short message containing instructional information to the edge beam footprint, when user equipment receives the short message, it determines that it has entered the edge beam footprint and then immediately triggers a system information update after receiving system information in the most recent received occultation. For example, when user equipment moves from inside the first cell to the edge region, the user equipment receives a short message with bit 5 set to 1, at which point it immediately triggers a system information update, i.e., updates the system information using the system information related to the adjacent cell, and then uses the updated system information to measure the adjacent cell. If the signal strength of the adjacent cell is greater than the signal strength of the first cell, it indicates that the user equipment is likely to move to the adjacent cell, and the user equipment performs cell reselection or switching, the embodiments of the present application do not specifically limit the conditions for cell reselection or switching.

[0056] In one possible embodiment, the method of receiving short messages differs depending on the user device, specifically as described in the embodiment below.

[0057] (1) The user's device is in an idle or inactive state. The user device monitors short messages transmitted from a base station on the satellite via a satellite beam using a target paging operation corresponding to the user device. When a user device is idle or inactive, it does not always read short messages. To obtain short messages in a timely manner, the user device reads short messages during the corresponding paging occasion (i.e., a non-continuous paging occasion) and determines whether or not they contain instructional information.

[0058] (2) The user's device is connected. The user device monitors short messages transmitted from a base station on the satellite via the beam using one of the paging operations. If the user device is connected, it will select at least one paging occasion during each default paging cycle to monitor short messages and determine whether or not they contain instructional information.

[0059] If a user device first enters a non-edge beam footprint (e.g., power is turned on within the cell) and then moves from the non-edge beam footprint to an edge beam footprint, the instruction information in the short message will cause the device to reacquire complete system information, including adjacent cell information, at the edge beam footprint. If a user device first enters an edge beam footprint and then moves from the edge beam footprint to a non-edge beam footprint, the device will not update its system information because it has already received the system information (i.e., system information related to adjacent cells and the system information of the first cell) at the edge beam footprint. If a user device passes through edge beam footprint -> non-edge beam footprint -> edge beam footprint, it will receive multiple short messages containing instruction information, and unless the previously received adjacent cell information has expired, it does not need to reacquire the system information of the adjacent cell. Furthermore, if a user device repeatedly receives short messages with bit 5 set to 1 in the same cell, and the adjacent cell information has not expired, it may update the adjacent cell-related SIB only once, thus saving power consumption for the user device.

[0060] According to the current 3GPP protocol specifications, user equipment cannot know when it has entered the edge region of a cell, and user equipment cannot change its beam footprint within the same cell to receive system information again. An embodiment of the present invention provides a solution that instructs user equipment to update system information in a timely manner by expanding short messages, thereby ensuring that user equipment can update adjacent cell-related SIBs in a timely manner at the edge of a cell.

[0061] The following Figure 5 illustrates in detail the specific procedure by which a base station on a satellite broadcasts information to user equipment.

[0062] In Step 1, as shown in Figure 6, the user device is located inside Cell 1 (including scenes where it resides in Cell 1 in various forms such as cell selection, re-selection, 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 the system information of SIB1 schedules only SIB19, and the mobile speed of the cell corresponding to the satellite is faster than that of the user equipment.

[0064] An example of si-SchedulingInfo for 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 system information shows the broadcast status as "broadcasting" (si-BroadcastStatus-r17=broadcasting). The broadcast cycle for system information is 64 frames (si - Periodicity - r17 = rf64). Mapping information for system information blocks (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 includes NTN-specific parameters related to the first cell (ntn-Config-r17) but does not include NTN-specific parameters corresponding to adjacent cells (ntn-NeighCellConfigList-r17).

[0065] In step 3, as the satellite moves or the user equipment moves, the user equipment begins to enter the edge (black area) of cell 1.

[0066] In step 4, the base station on the satellite continuously transmits short messages containing instructional information in the cell's edge beam footprint, and in the embodiment of the present invention, 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 and SIB1.

[0067] The scheduling information (si-SchedulingInfo) in the system information of SIB1 schedules SIB2-5 and SIB19, for example as follows: System information scheduling information (si-SchedulingInfo) Scheduling Information List (schedulingInfoList) Item-0 Scheduling information (SchedulingInfo) The system information's broadcast status is currently broadcasting (si-BroadcastStatus=broadcasting). The broadcast cycle for system information 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 numerical tag is 0 (valueTag=0) Item-1 Scheduling information (SchedulingInfo) The system information's broadcast status is currently broadcasting (si-BroadcastStatus=broadcasting). The broadcast cycle for system information 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 numerical tag is 0 (valueTag=0) Item-2 Scheduling information (SchedulingInfo) The system information's broadcast status is currently broadcasting (si-BroadcastStatus=broadcasting). The broadcast cycle for system information 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 numerical tag is 0 (valueTag=0) Item-3 Scheduling information (SchedulingInfo) The system information's broadcast status is currently broadcasting (si-BroadcastStatus=broadcasting). The broadcast cycle for system information 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 numerical 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 system information shows the broadcast status as "broadcasting" (si-BroadcastStatus-r17=broadcasting). The broadcast cycle for system information is 64 frames (si - Periodicity - r17 = rf64). Mapping information for system information blocks (sib-MappingInfo-r17) Item-0 System information block type information v1700 extension (SIB-TypeInfo-v1700) The type is sib19 (type1-r17=sibType19). The numerical tag is 1 (valueTag-r17=1) SIB19 includes NTN-specific parameters related to the first cell and NTN-specific parameters corresponding to the adjacent cells.

[0068] In step 5, after the user device receives a short message containing instruction information, it immediately updates its system information using the received system information for cell 3, and obtains the measurement placement of cell 3 and the ephemeris settings of the base station on the satellite corresponding to cell 3.

[0069] In step 6, the user's equipment performs measurement, reselection, or switching based on the 3GPP protocol to change cell 1 to cell 3.

[0070] Based on the same inventive concept, embodiments of the present application further provide a system information broadcasting device applicable to a base station on a satellite, as shown in Figure 7, the device, An edge beam footprint determination module for determining the edge beam footprint corresponding to a first cell, wherein the first cell is a ground coverage area corresponding to a base station on the satellite, and the edge beam footprint is located at the edge position of the ground coverage area, comprising an edge beam footprint determination module 701, The system includes a broadcast module 702 that broadcasts system information related to adjacent 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 ground coverage area by satellite beam.

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

[0072] In one possible embodiment, the broadcast module 702 broadcasts NTN-specific parameters related to the adjacent cell in the system information blocks SIB2, SIB3, SIB4, SIB5, and SIB19. The SIB19 is configured to broadcast NTN-specific parameters related to the first cell, as well as system information unrelated to adjacent cells.

[0073] In one possible embodiment, the broadcast module 702 is: The system is configured to transmit instruction information to the edge beam footprint, the instruction information instructing the user device to determine to be located on the edge beam footprint and to update system information in the most recent received occupancy, and the instruction information is included in a short message. The instruction information includes system information modification information, and if the modification information is 1, it instructs to modify the broadcast control ChannelBCCH corresponding to system information blocks SIB1, SIB2, SIB3, SIB4, SIB5 and SIB19.

[0074] In one possible embodiment, the broadcast module 702 is: System information related to all adjacent cells, System information related to some adjacent cells, The system is configured to determine system information relating to the adjacent cell, which includes at least one of the following: system information relating to the first adjacent cell of the first cell.

[0075] Based on the same inventive concept, the embodiments of this application are: The present invention further provides a user device comprising at least one processor and a memory communicably connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and when the instructions are executed by the at least one processor, the at least one processor causes the at least one processor to execute a system information receiving method applicable to the user device in the above embodiment.

[0076] As shown in Figure 8, the user device 800 includes a processor 801, memory 802, and a communication interface 803. The processor 801, memory 802, and 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, and as a result, at least one processor can execute the system information receiving method applied to the user equipment according to the above embodiment.

[0078] The memory 802 is configured to store various commands and programs for a system information receiving method applied to the user device according to the above embodiment.

[0079] Based on the same inventive concept, the embodiments of this application are: The present invention further provides an electronic device comprising at least one processor and a memory communicably connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and when the instructions are executed by the at least one processor, the at least one processor causes the at least one processor to execute the system information broadcasting method applied to the satellite base station in the above embodiment.

[0080] As shown in Figure 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 each other via a bus 904.

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

[0082] The memory 902 is configured to store various commands and programs for a system information broadcasting method applied to the base station and user equipment on the satellite according to the above embodiment.

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

[0084] Processors 801 and 901 may be a central processing unit (CPU), a network processor (NP), a graphics processing unit (GPU), or any combination of CPU, NP, and GPU. They may also be hardware chips. The hardware chips may be application-specific integrated circuits (ASICs), programmable logic devices (PLDs), or a combination thereof. The PLDs may be complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), generic array logic (GALs), or a combination thereof.

[0085] Embodiments of the present application further provide 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 system information receiving methods. For example, all or part of the methods in the present application can be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of it may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded into a computer and executed, all or part of the procedures or functions of the present application are executed. The computer may be a general-purpose computer, a dedicated computer, a computer network, network equipment, user equipment, core network equipment, OAM, or another programmable device.

[0086] Preferably, the computer-readable storage medium can be one implementation of the above-mentioned computer program product, that is, the embodiment of the present application further provides a computer-readable storage medium containing a computer program, and when the computer program is executed by a processor, either of the above-mentioned system information broadcasting methods or system information receiving methods is realized.

[0087] For example, a computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, a computer program or instruction may be transmitted by wire or wirelessly from one website, computer, server, or data center to another website, computer, server, or data center. The computer-readable storage medium may be any usable medium accessible by a computer, or a data storage device such as a server or data center that integrates one or more usable media. The usable medium may be a magnetic medium such as a floppy disk, hard disk, or magnetic tape, an optical medium such as a digital video disc, 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 understand that embodiments of this application may be provided as methods, systems, or computer program products. Accordingly, this application may be provided in the form of hardware-only embodiments, software-only embodiments, or embodiments using a combination of software and hardware. Furthermore, this application may be provided in the form of a computer program product implemented on one or more computer-compatible storage media (including, but not limited to, magnetic disk memory, CD-ROM, optical memory, etc.) containing computer-compatible program code.

[0089] This application describes the methods, apparatus (systems), and computer program products according to this application with reference to flowcharts and / or block diagrams. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be executed by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a dedicated computer, an embedded processor, or a processor of another programmable data processing device, so as to generate a machine, where instructions executed by the processor of the computer or another programmable data processing device generate a device for performing a specific function in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0090] These computer program instructions may be stored in computer-readable memory such that the instructions stored in computer-readable memory generate artifacts including an instruction unit, which can be instructed to operate in a particular manner on a computer or another programmable data processing device, and which perform a particular function in one or more flows in a flowchart and / or one or more blocks in a block diagram.

[0091] These computer program instructions may be loaded onto a computer or another programmable data processing device, and as a result, a series of operations and steps are performed on the computer or another programmable device, thereby generating computer execution processing. Thus, instructions executed on the computer or another programmable device provide steps for performing specific functions in one or more flows in a flowchart and / or in one or more blocks in a block diagram. Clearly, 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 if such modifications and variations fall within the scope of the claims and equivalents of the present application.

Claims

1. A system information broadcasting method applicable to a base station on a satellite, A step of determining the edge beam footprint corresponding to a first cell, wherein the first cell is a ground coverage area corresponding to a base station on the satellite, and the edge beam footprint is located at the edge of the ground coverage area. The process of broadcasting system information to the ground coverage area by satellite beam includes the step of broadcasting system information related to adjacent cells of the first cell and system information related to the first cell to the edge beam footprint, The step of broadcasting system information related to adjacent cells of the first cell to the edge beam footprint is: A system information broadcasting method characterized by the step of transmitting instruction information to the edge beam footprint, wherein the instruction information instructs the user device to determine to be located on the edge beam footprint and to update system information in the most recent reception occupancy.

2. The method according to claim 1, further comprising the step of broadcasting system information related to a first cell to a non-edge beam footprint corresponding to a first cell, and not broadcasting system information related to an adjacent cell, wherein the non-edge beam footprint is located at a non-edge position in the ground coverage area.

3. The system information relating to adjacent cells is: The system information blocks SIB2, SIB3, SIB4, SIB5, and SIB19 include at least one of the NTN-specific parameters related to the adjacent cells, The system information related to the first cell is, The method according to claim 1, characterized in that it includes an SIB 19 containing NTN-specific parameters related to the first cell, and system information independent of adjacent cells.

4. The instruction information includes information on correcting system information, The method according to claim 1, characterized in that, if the correction information is 1, it instructs to correct the broadcast control channel BCCH corresponding to the system information blocks SIB1, SIB2, SIB3, SIB4, SIB5, and SIB19.

5. The method according to claim 1, characterized in that the instruction information is included in a short message.

6. The system information relating to the adjacent cells of the first cell is, The method according to claim 1, characterized in that it includes system information relating to all adjacent cells.

7. The system information relating to the adjacent cells of the first cell is, The method according to claim 1, characterized in that it includes system information related to some adjacent cells.

8. The system information relating to the adjacent cells of the first cell is: The method according to claim 1, characterized in that it includes system information relating to the first adjacent cell of the first cell.

9. A method for receiving system information applied to user equipment, A step of moving user equipment from a non-edge beam footprint of a first cell to an edge beam footprint of a first cell, wherein the first cell is a ground coverage area corresponding to a base station on a satellite, and the edge beam footprint is located at the edge of the ground coverage area. A step in which user equipment receives instruction information transmitted from a base station on a satellite at an edge beam footprint, wherein the instruction information indicates that the user equipment is located at an edge beam footprint. The steps include determining that the user equipment is located on the edge beam footprint based on the instruction information, A method for receiving system information, characterized by comprising the step of receiving system information relating to adjacent cells of the first cell broadcast from a base station on the satellite at the edge beam footprint.

10. After determining that it is located on the edge beam footprint, the method The method according to 9, further comprising the step of updating system information in the most recent received occupancy.

11. The system information relating to the adjacent cell is, System information related to all adjacent cells, System information related to some adjacent cells, The method according to 9, characterized in that it includes at least one of the following: system information relating to the first adjacent cell of the first cell.

12. Currently, if the user device is in an idle or inactive state, the user device monitors short messages transmitted from the base station on the satellite via a paging operation; The method according to 9, further comprising the step of monitoring short messages transmitted from a base station on the satellite within any paging occupancy, if currently connected.

13. A system information broadcasting device applicable to a base station on a satellite, An edge beam footprint determination module for determining the edge beam footprint corresponding to a first cell, wherein the first cell is a ground coverage area corresponding to a base station on the satellite, and the edge beam footprint is located at the edge position of the ground coverage area, and the edge beam footprint determination module is located at the edge position of the ground coverage area. In the process of broadcasting system information to the ground coverage area by satellite beam, the system includes a broadcast module that broadcasts system information related to adjacent cells of the first cell and system information related to the first cell to the edge beam footprint, The aforementioned broadcast module is A system information broadcasting device characterized by broadcasting system information related to adjacent cells of the first cell to the edge beam footprint by the step of transmitting instruction information to the edge beam footprint, wherein the instruction information instructs the user device to determine to be located on the edge beam footprint and to update system information in the most recent reception occasion.

14. A user device comprising at least one processor and a memory communicably connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and when the instructions are executed by the at least one processor, the at least one processor causes the at least one processor to perform the method according to any one of claims 9 to 12.

Images