System information broadcasting method and apparatus, system information receiving method and apparatus, device, and storage medium

Abstract

The present application relates to the technical field of satellite communications, and in particular to a system information broadcasting method and apparatus, a system information receiving method and apparatus, a device, and a storage medium. The methods comprise: a satellite base station determining an edge beam position corresponding to a first cell; in the process of broadcasting system information to the coverage area by means of a satellite beam, broadcasting to the edge beam position the system information associated with a neighboring cell and the system information associated with the first cell; and after moving from a non-edge beam position to the edge beam position, a terminal receiving at the edge beam position the system information associated with the neighboring cell. The methods can ensure that a terminal acquires system information associated with a neighboring cell in a timely manner, and can reduce the power consumption of a satellite antenna in transmitting signals and save channel resources.

Description

System information broadcasting and receiving method, device, equipment and storage medium Technical Field

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

[0002] In the 5G communication system, System Information (SI) consists of a Master Information Block (MIB) and multiple System Information Blocks (SIBs). SIBs include various types, some of which are associated with neighboring cells, namely neighbor-cell-related SIBs, which contain information related to measurement, reselection, and neighboring star ephemeris, such as SIB2, SIB3, SIB4, SIB5, and SIB19. The content of "neighbor-cell-related SIBs" is the neighboring cell information of the current cell, which is mainly used for mobility management. The terminal uses these neighbor-cell-related SIBs to detect and measure neighboring cells so that it can switch to a new cell before the coverage of the current cell ends. In this way, the terminal can continuously reside between different cells in a mobile scenario to maintain service continuity.

[0003] In the existing 3rd Generation Partnership Project (3GPP) standard protocol, system information is broadcast periodically on a per-cell basis. This means that all terminals at all locations within the entire cell coverage area receive the same system information. However, satellite base stations correspond to cells with wide coverage areas, multiple wavelengths, and minimal overlap between cells. Therefore, periodic cell-level system information broadcasting is unsuitable for satellite communication systems, significantly increasing the power consumption of satellite antennas transmitting signals, crowding out air interface links, and wasting channel resources.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a system information broadcasting and receiving method, apparatus, device, and storage medium, which can reduce the power consumption of satellite antennas sending signals and save channel resources.

[0006] In a first aspect, an embodiment of the present application provides a system information broadcasting method, applied to a satellite base station, the method comprising:

[0007] Determining an edge wave position corresponding to a first cell, wherein the first cell is a ground coverage area corresponding to the satellite base station, and the edge wave position is located at an edge position of the ground coverage area;

[0008] In the process of broadcasting the system information to the coverage area through the satellite beam, the system information associated with the neighboring cells and the system information associated with the first cell are broadcast to the edge beam.

[0009] In one possible implementation, the method further includes:

[0010] System information associated with the first cell is broadcast to a non-edge beam position corresponding to the first cell, and system information associated with the neighboring cell is not broadcast, the non-edge beam position being located at a non-edge position of the ground coverage area.

[0011] In the above embodiment, each cell includes an edge beam position and a non-edge beam position, wherein the edge beam position is located at the edge of the cell. The satellite base station broadcasts the system information of the adjacent cells at the edge of the cell, which can ensure that the terminals located at the edge of the cell and having cell reselection or handover requirements can obtain the system information of the adjacent cells in a timely manner; the system information of the current cell is broadcast on the non-edge beam position, which can provide services for the terminals located within the cell. The above broadcasting method not only reduces the power consumption of the satellite antenna and improves the utilization rate of the satellite system resources, but also ensures the continuity of the service.

[0012] In a possible implementation manner, the system information associated with the neighboring cell includes at least one of the following:

[0013] Parameters of satellite base stations corresponding to neighboring cells in system information blocks SIB2, SIB3, SIB4, SIB5, and SIB19;

[0014] The system information associated with the first cell includes:

[0015] The SIB19 includes parameters of the satellite base station corresponding to the first cell and system information unrelated to neighboring cells.

[0016] In the above embodiment, SIB19 broadcast on the edge waveband includes the parameters of the satellite base station corresponding to the adjacent cells, SIB2 to 5 are not broadcast on the non-edge waveband, and the broadcast SIB19 does not include the parameters of the satellite base station corresponding to the adjacent cells. This setting of broadcasting different system information on different types of wavebands can reduce the power consumption of the satellite antenna and save channel resources.

[0017] In a possible implementation, broadcasting system information associated with a neighboring cell to the edge beam includes:

[0018] Indication information is sent to the edge wave position, where the indication information is used to enable the terminal to determine that it is located at the edge wave position and instruct the terminal to update system information in the latest receiving window, and the indication information is carried in a short message.

[0019] In a possible implementation manner, the content of the indication information is: if the system modification information is 1, the broadcast control channel BCCH corresponding to the system information blocks SIB1, SIB2, SIB3, SIB4, SIB5 and SIB19 is indicated to be modified.

[0020] In the above embodiment, a short message containing indication information is further sent at the edge beam position, so that the terminal can determine that it is located at the edge beam position of the first cell, and further the terminal can reacquire the system information broadcast by the satellite base station.

[0021] In a possible implementation manner, the system information associated with the neighboring cell includes at least one of the following:

[0022] System information associated with all neighboring cells;

[0023] System information associated with some neighboring cells;

[0024] System information associated with the first neighboring cell.

[0025] In the above embodiment, matching adjacent cells are pre-set for different edge beam positions, so that on any edge beam position, the neighboring cell-related SIB matching any edge beam position is broadcast instead of broadcasting all neighboring cell-related SIBs. This broadcasting method can save channel resources.

[0026] In a second aspect, an embodiment of the present application provides a method for receiving system information, which is applied to a terminal. The method includes:

[0027] The terminal moves to an edge wave position of a first cell, where the first cell is a ground coverage area corresponding to a satellite base station, and the edge wave position is located at an edge position of the ground coverage area;

[0028] System information associated with adjacent cells broadcast by the satellite base station is received on the edge beam position.

[0029] In the above embodiment, the terminal updates the system information of the adjacent cells at the edge wave position and receives the system information of the current cell at the non-edge wave position. While the satellite operates with low power consumption and high resource utilization, it further ensures that the terminal located at the edge wave position and having cell reselection or switching needs can obtain the system information of the adjacent cells in a timely manner and receive the continuity service provided by the satellite system.

[0030] In a possible implementation manner, after moving to the edge beam position of the first cell, the method further includes:

[0031] Determine the edge wave position.

[0032] In one possible implementation,

[0033] The determining of the edge wave position includes:

[0034] Indication information sent by a satellite base station is received at an edge wave position, where the indication information is used to indicate that the satellite is located at an edge wave position, and the indication information is carried in a short message.

[0035] In a possible implementation manner, after determining the edge wave position, the method further includes:

[0036] Updates system information in the most recent receive window.

[0037] In the above embodiment, the terminal can immediately trigger re-acquisition of the system information broadcast by the satellite base station after receiving the indication information, ensuring timely acquisition of neighboring cell-related SIBs at the cell edge without affecting the terminal's reselection or handover.

[0038] In a possible implementation manner, the system information associated with the neighboring cell includes at least one of the following:

[0039] System information associated with all neighboring cells;

[0040] System information associated with some neighboring cells;

[0041] System information associated with the first neighboring cell.

[0042] In one possible implementation, the method further includes:

[0043] If the terminal is currently in an idle state or an inactive state, receiving a short message sent by the satellite base station in a paging window corresponding to the terminal;

[0044] If it is currently in a connected state, the short message sent by the satellite base station is received in any paging window.

[0045] In the above embodiment, different modes of monitoring short messages are set for terminals in different states, so as to ensure that the terminals in different states can receive short messages including instruction information in a timely manner.

[0046] In a third aspect, an embodiment of the present application provides a system information broadcasting device, which is applied to a satellite base station. The device includes:

[0047] An edge wave position determination module is configured to determine an edge wave position corresponding to a first cell, wherein the first cell is a ground coverage area corresponding to the satellite base station, and the edge wave position is located at an edge position of the ground coverage area;

[0048] The broadcast module is configured to broadcast system information associated with the adjacent cells and system information associated with the first cell to the edge beam position during the process of broadcasting system information to the coverage area through the satellite beam.

[0049] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising:

[0050] 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 are executed by the at least one processor to cause the at least one processor to perform the method as described in the first aspect or the second aspect.

[0051] In a fifth aspect, an embodiment of the present application provides a terminal, comprising:

[0052] 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 are executed by the at least one processor to enable the at least one processor to perform the method of the second aspect above.

[0053] In a sixth aspect, an embodiment of the present application provides a computer storage medium, wherein the computer storage medium stores a computer program, and the computer program is used to enable a computer to execute the above-mentioned first aspect, or execute the method of the above-mentioned second aspect.

[0054] In a seventh aspect, an embodiment of the present application provides a computer program product, comprising a computer program, which implements the method of the above-mentioned first aspect or the above-mentioned second aspect when the computer program is executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic diagram of cells of multiple satellite base stations according to an embodiment of the present application;

[0056] FIG2 is a schematic diagram of an application scenario of a system information broadcasting method provided in an embodiment of the present application;

[0057] FIG3 is a flow chart of a method for broadcasting system information provided by an embodiment of the present application;

[0058] FIG4 is a schematic diagram of an edge wave position provided in an embodiment of the present application;

[0059] FIG5 is a schematic diagram of a satellite base station broadcasting to a terminal according to an embodiment of the present application;

[0060] FIG6 is a schematic diagram of a terminal receiving a broadcast in a first cell according to an embodiment of the present application;

[0061] FIG7 is a schematic diagram of a system information broadcasting device provided in an embodiment of the present application;

[0062] FIG8 is a schematic diagram of a terminal provided in an embodiment of the present application;

[0063] FIG9 is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] The principles and spirit of the present application will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided solely to enable those skilled in the art to better understand and implement the present application, and are not intended to limit the scope of the present application in any way. Rather, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0065] Those skilled in the art will appreciate that the embodiments of the present application may be implemented as a system, apparatus, method, or computer program product. Therefore, the present disclosure may be implemented in the following forms: entirely in hardware, entirely in software (including firmware, resident software, microcode, etc.), or in a combination of hardware and software.

[0066] It should be understood herein that any number of elements in the drawings is for illustration only and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0067] The following is an introduction to some concepts involved in the embodiments of this application.

[0068] System information: In the 5G communication system, SI consists of MIB and multiple SIBs. SIBs include multiple types, some of which are related to neighboring cells, including measurement, reselection and neighboring star ephemeris related information, such as SIB2, SIB3, SIB4, SIB5 and SIB19, etc., which are referred to as "neighboring cell-related SIBs" in the embodiment of this application. The content of "neighboring cell-related SIBs" is the system information of the neighboring cells of the cell where the terminal is currently stationed, and is mainly used for mobility management. The terminal uses these neighboring cell-related SIBs to detect and measure neighboring cells so that it can switch to the neighboring cell before the coverage of the currently stationed cell ends. In this way, the terminal can continuously reside between different cells in a mobile scenario to maintain service continuity.

[0069] The specific contents of the neighboring cell-related SIB are as follows:

[0070] SIB2: contains cell reselection information, mainly related to the serving cell;

[0071] SIB3: Contains service frequency information and intra-frequency neighbor cell information related to cell reselection;

[0072] SIB4: Contains information about New Radio (NR) inter-frequency neighboring cells related to cell reselection;

[0073] SIB5: Contains Evolved Universal Terrestrial Radio Access (E-UTRA) neighbor cell information related to cell reselection;

[0074] SIB19: contains parameters of non-terrestrial network (NTN) serving cells and neighboring cell satellites, such as satellite ephemeris and flight speed, etc. The neighboring cell-related SIB mentioned in this application refers to the parameters of neighboring cell satellites in SIB19.

[0075] Beam: A sub-area within the ground coverage area corresponding to a satellite base station. As shown in Figure 1, each "small square" in cell 1 represents the beam of cell 1. Satellite beams broadcast system information in units of beams.

[0076] Satellite beam: A beam sent by a satellite antenna to a ground coverage cell.

[0077] As shown in Figure 2, an application scenario of a system information broadcasting method provided by an embodiment of the present application includes at least one satellite (such as satellite 201_1, satellite 202_2, and satellite 201_N as shown in Figure 2) and at least one terminal (such as terminal 202_1, terminal 202_2, and terminal 202_N as shown in Figure 2). Among them, each satellite corresponds to its own cell (ground coverage area), that is, satellite 201_1 corresponds to cell 1, satellite 202_2 corresponds to cell 2, and satellite 201_N corresponds to cell N. The satellite can broadcast system information to terminals located on the ground, so that the terminal can use the system information to obtain service resources provided by the satellite, such as positioning. Multiple satellites are co-orbit satellites, which can be low-orbit satellites or high-orbit satellites. The terminal can be a mobile phone or an aircraft. The embodiment of the present application does not specifically limit the type of terminal.

[0078] As shown in Figure 1, the coverage area of ​​cell 1 will broadcast system information as a whole, that is, the system information of the adjacent cells will be broadcast in each wave position within the cell. However, the terminal is far away from the adjacent cells 2 to 7, and there is no need to change cells, nor can it receive the services provided by the adjacent cells. At this time, if the SIB related to the adjacent cells is broadcast in the area where the terminal is located, it will cause a waste of channel resources. Based on this problem, the embodiment of the present application provides a system information broadcast method applied to a satellite base station. The specific process is shown in Figure 3. The method includes:

[0079] S301: Determine the edge wave position corresponding to the first cell.

[0080] Among them, the first cell is the ground coverage area corresponding to the target satellite base station, that is, the cell where the terminal is currently stationed, and is also referred to as the current cell in the embodiment of the present application. The edge wave position is located at the edge of the ground coverage area. As shown in Figure 1, for cell 1, the edge position is the "black part", that is, the "black grid" is the edge wave position of cell 1. The shape of the cell can be rectangular, regular hexagonal, circular, etc., and is not specifically limited here. In addition, Figure 1 shows that the neighboring cells of cell 1 include cells 2 to 7.

[0081] Due to the different beamwidths of different satellite systems, different cell overlap ranges, different cell-configured paging cycles, and different terminal measurement capabilities, the cell edge can be one beamwidth or multiple beamwidths. Different edge regions can also be set for different cells in the same satellite system. For example, the edge of cell 1 can be one beamwidth or two beamwidths. Specific requirements can be determined based on the needs of the actual system. That is, under the premise of ensuring that the terminal has sufficient time to reacquire and update system information and perform measurements at the cell edge before leaving the currently resident cell, a beamwidth as small as possible is defined. This is not specifically limited in the embodiments of the present application.

[0082] The system information broadcasting method provided in the embodiment of the present application can be applied to high-orbit satellite systems (synchronous satellite systems) and low-orbit satellite systems (asynchronous satellite systems). For asynchronous satellites, their flight speed may be greater than the earth's rotation speed. That is to say, the cell corresponding to the asynchronous satellite is not in a fixed position. There may also be a cell whose moving speed is much higher than the terminal moving speed. In this case, the definition of the edge wave position can be further optimized as shown in Figure 4 (black grid). That is to say, the terminal will not enter the adjacent area from the front area of ​​the cell's moving direction (i.e., the upper edge position), so the system information associated with the adjacent cell may not be broadcast in this area, and only the system information associated with the current cell may be broadcast.

[0083] S302: In the process of broadcasting system information to the coverage area through the satellite beam, the system information associated with the adjacent cells and the system information associated with the first cell are broadcast to the edge beam position; the system information associated with the first cell is broadcast to the non-edge beam position, and the system information associated with the adjacent cells is not broadcast.

[0084] In an embodiment of the present application, for a cell corresponding to a satellite base station, the coverage area is relatively wide and there are many beams. If antenna resources are sufficient, an antenna (i.e., a satellite beam) can be configured for each beam in the cell to broadcast system information, that is, the system information can be broadcast to each beam simultaneously. However, if antenna resources are insufficient, the same antenna (i.e., a satellite beam) can be configured for multiple beams to broadcast system information. Specifically, the system information corresponding to the beam can be broadcast in a time-division manner on different beams in a round-robin manner. The embodiment of the present application does not specifically limit the broadcast order, as long as the corresponding system information is broadcast at the broadcast time corresponding to the beam.

[0085] The specific implementation method provided by the embodiment of the present application for configuring one antenna for multiple beam positions to broadcast system information is as follows:

[0086] In the scenario where the terminal receives system information broadcast by a satellite base station, the terminal receives the system information once in the cell where it is currently located, that is, it will not receive the system information repeatedly. If the satellite base station requires the terminal to update the system information, it will send an instruction to update the system information to the terminal by sending a short message. In an embodiment of the present application, when the terminal is located at the edge wave position of the first cell, it indicates that the terminal may need to change the cell, and at this time it is necessary to instruct the terminal to update the system information. According to the current 3rd Generation Partnership Project (3GPP) protocol, when the terminal moves to the edge within the first cell, it is not necessary to re-read the broadcast system information. The embodiment of the present application proposes an implementation method for updating the system information when the terminal enters the edge wave position based on a short message indication, that is, using a satellite beam to send a short message containing indication information to the edge wave position, and the indication information is used to instruct the terminal to update the system information.

[0087] In the existing 3GPP, the base station can send a short message on the physical downlink control channel through the downlink control information (DCI 1_0) scrambled by the paging radio network temporary identifier (P-RNTI). There are multiple bytes (bits) of indication information in the short message to indicate different processes. For example, bit 1 can indicate a change in system information, but the system information change defined by 3GPP needs to take effect within the next modification period. The modification period is configured by the modification period coefficient (modificationPeriodCoeff) and the default paging cycle (defaultPagingCycle) in SIB1, and the configurable interval is 640ms to 40.96s. Due to the fast movement speed of non-synchronous satellites, if the update is not performed until the next modification period, the terminal may have left the edge area and may not be able to update the system information in time. Based on this, the embodiment of the present application extends the indication information in the short message, that is, any one of the indication information in bit5 to bit8, and the embodiment of the present application selects bit5 as the indication information. This bit is used to instruct the terminal to reread the system information broadcast by the satellite base station in the nearest reception window at an edge wavelength. This means that upon receiving the system information, the terminal should immediately update the system information. Because existing technologies require waiting until the next change cycle to update system information, and because system information broadcast at edge wavelengths requires faster changes, the terminal must immediately update the system information. The extended indicator bits in this embodiment are shown in Table 1.

[0088] Table 1

[0089] The satellite beam is on the edge beam position, and at each paging opportunity, a short message is used to instruct the terminal to update system information. That is, the satellite beam only sends short messages on the edge beam position, where bit 5 in the short message is 1 (indication information).

[0090] The system information broadcasting method applied to a satellite base station provided in an embodiment of the present application broadcasts neighboring cell-related SIBs in the edge area of ​​the cell and broadcasts local cell-related SIBs in the non-edge area, thereby reducing the power consumption of satellite-transmitted signals and saving channel resources.

[0091] Based on the same inventive concept, an embodiment of the present application further provides a system information receiving method, which is applied to a terminal and includes:

[0092] The terminal moves from a non-edge beam position of the first cell to an edge beam position of the first cell, and receives system information associated with a neighboring cell broadcast by a satellite base station at the edge beam position.

[0093] The first cell is a ground coverage area corresponding to the satellite base station. The satellite base station can broadcast system information associated with adjacent cells to edge beams using a satellite beam. The edge beams are located at the edge of the ground coverage area. The specific broadcasting of system information associated with adjacent cells to the edge beams using a satellite beam, as well as S301 to S302 described above, are not further described here.

[0094] If the terminal moves from a non-edge wave position to an edge wave position, it indicates that the terminal may enter the coverage of an adjacent cell. In order to ensure the continuity of the service, it may reselect the cell in an idle state or an inactive state, or switch the cell in a connected state. Since the satellite base station will send a short message containing indication information to the edge wave position, if the terminal receives the short message, it will determine that it has entered the edge wave position, and then immediately trigger the update of the system information after receiving the system information in the most recent receiving window. For example, when the terminal moves from the inside of the first cell to the edge area, a short message with bit 5 being 1 is received on the terminal side, and then the system information is immediately triggered to update, that is, the system information is updated using the system information associated with the adjacent cell, and then the adjacent cell is measured using the updated system information. If the signal strength of the adjacent cell is greater than the signal strength of the first cell, it indicates that the terminal has a tendency to move to the adjacent cell, and the terminal reselects or switches the cell. The embodiment of the present application does not specifically limit the conditions for cell reselection or switching.

[0095] In a possible implementation, the terminal receives short messages in different ways in different states, as shown in the following implementation:

[0096] (1) The terminal is in idle or inactive state.

[0097] A short message sent by a satellite base station through a satellite beam is received in a target paging window corresponding to the terminal.

[0098] When the terminal is in an idle or inactive state, it will not read short messages all the time. In order to obtain short messages in a timely manner, the terminal will read short messages in its corresponding paging window (ie, paging opportunity of a non-continuous cycle) and determine whether it contains indication information.

[0099] (2) The terminal is in connected state.

[0100] Receive short messages sent by the satellite base station through the beam in any paging window.

[0101] If the terminal is in a connected state, the terminal should select at least one paging window (paging occasion) in each default paging cycle (defaultPagingCycle) to monitor short messages and determine whether the indication information is contained.

[0102] If a terminal first enters a non-edge beamform (for example, when powered on within a cell) and then moves from a non-edge beamform to an edge beamform, it will use the indication information in the short message to re-read the complete system information, including neighboring cell information, in the edge beamform. If a terminal first enters an edge beamform and then moves from an edge beamform to a non-edge beamform, the terminal will not update the system information because the edge beamform has already received all the system information (i.e., system information associated with neighboring cells and system information of the first cell). If a terminal experiences the following transition: edge beamform -> non-edge beamform -> edge beamform, and receives multiple short messages containing indication information, if the previously received neighboring cell information has not expired, it does not need to re-receive neighboring cell system information. In addition, if a terminal repeatedly receives short messages with bit 5 set to 1 in the same cell and the neighboring cell information has not expired, it can update the neighboring cell-related SIB only once to save terminal power consumption.

[0103] According to the current 3GPP protocol specifications, the terminal cannot be notified of entering the cell edge area, and the terminal will not re-receive system information when changing the wave position in the same cell. The embodiment of the present application proposes a solution to instruct the terminal to immediately update the system information through an extended short message, ensuring that the terminal can promptly update the SIB related to the neighboring cell at the cell edge.

[0104] The specific process of broadcasting information from a satellite base station to a terminal will be described in detail below with reference to FIG. 5 .

[0105] Step 1: As shown in FIG6 , the terminal is inside cell 1 (including scenarios where the terminal resides in cell 1 through various forms such as cell selection, reselection, handover, or redirection);

[0106] Step 2: The terminal receives the broadcast information at a non-edge beam position. The system information sent by the satellite base station includes MIB and SIB1. The scheduling information (si-SchedulingInfo) of the system information in SIB1 only schedules SIB19. The mobile speed of the satellite corresponding cell is higher than that of the terminal.

[0107] An example of si-SchedulingInfo for SIB1 is as follows:

[0108] System Information Scheduling Information v1700 Extension (SI-SchedulingInfo-v1700)

[0109] Scheduling Information List 2 (schedulingInfoList2-r17)

[0110] Item-0

[0111] Scheduling Information 2 (SchedulingInfo2-r17)

[0112] The broadcast status of the system information is broadcasting (si-BroadcastStatus-r17 = broadcasting)

[0113] The broadcast period of system information is 64 frames (si-Periodicity-r17=rf64)

[0114] System Information Block Mapping Information (sib-MappingInfo-r17)

[0115] Item-0

[0116] System Information Block Type Information v1700 Extension (SIB-TypeInfo-v1700)

[0117] Type is sib19 (type1-r17=sibType19)

[0118] The value tag is 0 (valueTag-r17=0)

[0119] SIB19 includes the parameters of the satellite base station corresponding to the first cell (ntn-Config-r17), but does not include the parameters of the satellite base station corresponding to the neighboring cells (ntn-NeighCellConfigList-r17).

[0120] Step 3: Due to satellite movement or terminal movement, the terminal begins to enter the edge of cell 1 (black area).

[0121] Step 4: The satellite base station continuously sends short messages containing indication information at the cell edge. In the embodiment of the present application, the extended bit5 (systemInfoModificationForMobility) is set to 1. The satellite base station broadcasts the system information of cell 3 including MIB and SIB1 at the edge area.

[0122] The scheduling information (si-SchedulingInfo) of the system information in SIB1 schedules SIB2 to SIB5 and SIB19, as shown below:

[0123] System information scheduling information (si-SchedulingInfo)

[0124] Scheduling Information List (schedulingInfoList)

[0125] Item-0

[0126] Scheduling Information (SchedulingInfo)

[0127] The broadcast status of the system information is broadcasting (si-BroadcastStatus = broadcasting)

[0128] The broadcast period of system information is 32 frames (si-Periodicity=rf32)

[0129] System Information Block Mapping Information (sib-MappingInfo)

[0130] Item-0

[0131] System Information Block Type (SIB-TypeInfo)

[0132] Type is sib2 (type=sibType2)

[0133] The value tag is 0 (valueTag=0)

[0134] Item-1

[0135] Scheduling Information (SchedulingInfo)

[0136] The broadcast status of the system information is broadcasting (si-BroadcastStatus = broadcasting)

[0137] The broadcast period of system information is 64 frames (si-Periodicity=rf64)

[0138] System Information Block Mapping Information (sib-MappingInfo)

[0139] Item-0

[0140] System Information Block Type (SIB-TypeInfo)

[0141] Type is sib3 (type=sibType3)

[0142] The value tag is 0 (valueTag=0)

[0143] Item-2

[0144] Scheduling Information (SchedulingInfo)

[0145] The broadcast status of the system information is broadcasting (si-BroadcastStatus = broadcasting)

[0146] The broadcast period of system information is 64 frames (si-Periodicity=rf64)

[0147] System Information Block Mapping Information (sib-MappingInfo)

[0148] Item-0

[0149] System Information Block Type (SIB-TypeInfo)

[0150] Type is sib4 (type=sibType4)

[0151] The value tag is 0 (valueTag=0)

[0152] Item-3

[0153] Scheduling Information (SchedulingInfo)

[0154] The broadcast status of the system information is broadcasting (si-BroadcastStatus = broadcasting)

[0155] The broadcast period of system information is 64 frames (si-Periodicity=rf64)

[0156] System Information Block Mapping Information (sib-MappingInfo)

[0157] Item-0

[0158] System Information Block Type (SIB-TypeInfo)

[0159] Type is sib5 (type=sibType5)

[0160] The value tag is 0 (valueTag=0)

[0161] System Information v1700 Scheduling Information (SI-SchedulingInfo-v1700)

[0162] Scheduling Information List 2 (schedulingInfoList2-r17)

[0163] Item-0

[0164] Scheduling Information 2 (SchedulingInfo2-r17)

[0165] The broadcast status of the system information is broadcasting (si-BroadcastStatus-r17 = broadcasting)

[0166] The broadcast period of system information is 64 frames (si-Periodicity-r17=rf64)

[0167] System Information Block Mapping Information (sib-MappingInfo-r17)

[0168] Item-0

[0169] System Information Block Type Information v1700 Extension (SIB-TypeInfo-v1700)

[0170] Type is sib19 (type1-r17=sibType19)

[0171] The value tag is 1 (valueTag-r17=1)

[0172] SIB19 includes parameters of the satellite base station corresponding to the first cell and parameters of the satellite base station corresponding to the adjacent cell.

[0173] Step 5: After receiving the short message containing the instruction information, the terminal immediately updates the system information using the received system information of cell 3, and obtains the measurement configuration of cell 3 and the ephemeris configuration of the satellite base station corresponding to cell 3.

[0174] Step 6: The terminal performs measurements based on the 3GPP protocol, reselects or switches, and changes cell 1 to cell 3.

[0175] Based on the same inventive concept, an embodiment of the present application further provides a system information broadcasting device, which is applied to a satellite base station. As shown in FIG7 , the device includes:

[0176] The edge position determination module 701 is configured to determine an edge position corresponding to a first cell, where the first cell is a ground coverage area corresponding to the satellite base station, and the edge position is located at an edge of the ground coverage area;

[0177] The broadcast module 702 is configured to broadcast system information associated with the neighboring cells and system information associated with the first cell to the edge beam position during the process of broadcasting system information to the coverage area via the satellite beam.

[0178] In one possible implementation, the broadcast module 702 is configured to:

[0179] System information associated with the first cell is broadcast to a non-edge beam position corresponding to the first cell, and system information associated with the neighboring cell is not broadcast, the non-edge beam position being located at a non-edge position of the ground coverage area.

[0180] In a possible implementation, the broadcast module 702 is configured to broadcast parameters of satellite base stations corresponding to neighboring cells in system information blocks SIB2, SIB3, SIB4, SIB5, and SIB19;

[0181] And broadcast SIB19 containing parameters of the satellite base station corresponding to the first cell and system information unrelated to neighboring cells.

[0182] In one possible implementation, the broadcast module 702 is configured to:

[0183] Sending indication information to the edge wave position, where the indication information is used to enable the terminal to determine that it is located at the edge wave position and instruct the terminal to update system information in a recent receiving window, and the indication information is carried in a short message;

[0184] The content of the indication information is: if the system modification information is 1, the broadcast control channel BCCH corresponding to the system information blocks SIB1, SIB2, SIB3, SIB4, SIB5 and SIB19 is indicated to be modified.

[0185] In a possible implementation, the broadcast module 702 is configured to determine the system information associated with the neighboring cell, including at least one of the following:

[0186] System information associated with all neighboring cells;

[0187] System information associated with some neighboring cells;

[0188] System information associated with the first neighboring cell.

[0189] Based on the same inventive concept, an embodiment of the present application further provides a terminal, including:

[0190] 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 are executed by the at least one processor to enable the at least one processor to execute the system information receiving method applied to the terminal in the above embodiment.

[0191] As shown in FIG8 , a terminal 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 interconnected via a bus 804 .

[0192] The processor 801 is configured to read and execute instructions in the memory 802, so that the at least one processor can execute the system information receiving method applied to a terminal provided in the above embodiment.

[0193] The memory 802 is used to store various instructions and programs of the system information receiving method applied to the terminal provided by the above embodiment.

[0194] Based on the same inventive concept, an embodiment of the present application further provides an electronic device, including:

[0195] At least one processor; and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor so that the at least one processor can execute the system information broadcasting method applied to a satellite base station in the above-mentioned embodiment.

[0196] As shown in FIG9 , an 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 interconnected via a bus 904 .

[0197] 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 a satellite base station and a terminal provided in the above embodiment.

[0198] The memory 902 is used to store various instructions and programs of the system information broadcasting method applied to the satellite base station and terminal provided in the above embodiment.

[0199] Buses 804 and 904 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. Buses can be categorized as address buses, data buses, and control buses. For ease of illustration, only one thick line is used in Figures 8 and 9, but this does not imply that there is only one bus or only one type of bus.

[0200] Processors 801 and 901 can be a central processing unit (CPU), a network processor (NP), a graphic processing unit (GPU), or any combination of a CPU, NP, and GPU. They can also be hardware chips. The above-mentioned hardware chips can be application-specific integrated circuits (ASICs), programmable logic devices (PLDs), or any combination thereof. The above-mentioned PLDs can be complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), generic array logic (GALs), or any combination thereof.

[0201] An embodiment of the present application further provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-described system information broadcasting or system information receiving methods. For example, the method in the present application can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the process or function of the present application is executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, a core network device, an OAM, or other programmable device.

[0202] Optionally, a computer-readable storage medium can be used as an implementation method of the above-mentioned computer program product, that is, an embodiment of the present application also provides a computer-readable storage medium, which includes a computer program, and when the computer program is executed by a processor, it implements any of the above-mentioned system information broadcasting or any of the system information receiving methods.

[0203] For example, a computer program or instruction can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, a computer program or instruction can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. A computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that integrates one or more available media. Available media can be magnetic media, such as floppy disks, hard disks, or magnetic tapes; optical media, such as digital video disks; or semiconductor media, such as solid-state drives. The computer-readable storage medium can be volatile or non-volatile, or can include both volatile and non-volatile types of storage media.

[0204] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0205] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or box in the flow chart and / or block diagram, as well as the combination of the flow chart and / or box in the flow chart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flow charts and / or one or more boxes in the block diagram.

[0206] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0207] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes of the flowchart and / or one or more blocks of the block diagram. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the claims and

[0208] This application also intends to include these changes and modifications as long as they fall within the scope of equivalent technology.

Claims

1. A method for broadcasting system information, characterized in that, Applied to a satellite base station, the method includes: Determine the edge wave position corresponding to the first cell, where the first cell is the ground coverage area corresponding to the satellite base station, and the edge wave position is located at the edge of the ground coverage area; During the process of broadcasting system information to the coverage area through a satellite beam, broadcast the system information associated with adjacent cells and the system information associated with the first cell to the edge wave position.

2. The method according to claim 1, characterized in that, The method further includes: Broadcast the system information associated with the first cell to the non-edge wave positions corresponding to the first cell, and do not broadcast the system information associated with adjacent cells. The non-edge wave positions are located at non-edge positions of the ground coverage area.

3. The method according to claim 1, characterized in that The system information associated with adjacent cells includes at least one of the following: System Information Blocks SIB2, SIB3, SIB4, SIB5, and the parameters of the satellite base station corresponding to the adjacent cell in SIB19; The system information associated with the first cell includes: SIB19 containing the parameters of the satellite base station corresponding to the first cell and system information unrelated to adjacent cells.

4. The method according to claim 1, wherein Broadcasting the system information associated with adjacent cells to the edge wave position includes: Send indication information to the edge wave position, where the indication information is used to enable the terminal to determine that it is located at the edge wave position and instruct the terminal to update the system information in the nearest reception window.

5. The method according to claim 4, characterized in that The content of the indication information is: If the system modification information is 1, then instruct the Broadcast Control Channel BCCH corresponding to System Information Blocks SIB1, SIB2, SIB3, SIB4, SIB5, and SIB19 to be modified.

6. The method according to claim 4, characterized in that The indication information is carried in a short message.

7. The method according to claim 1, wherein The system information associated with adjacent cells includes: System information associated with all adjacent cells.

8. The method according to claim 1, wherein The system information associated with adjacent cells includes: System information associated with some adjacent cells.

9. The method according to claim 1, characterized in that, The system information associated with adjacent cells includes: System information associated with the first adjacent cell.

10. A method for receiving system information, characterized in that, Applied to a terminal, the method includes: The terminal moves from a non-edge wave position of the first cell to an edge wave position of the first cell. The first cell is the ground coverage area corresponding to the satellite base station, and the edge wave position is located at the edge of the ground coverage area; At the edge wave position, receive the system information associated with adjacent cells broadcast by the satellite base station.

11. The method according to claim 10, characterized in that, After moving to the edge wave position of the first cell, it further includes: Determine that it is located at the edge wave position.

12. The method according to claim 11, wherein Determining that it is located at the edge wave position includes: Receive indication information sent by the satellite base station at the edge wave position, where the indication information is used to indicate that the terminal is located at the edge wave position.

13. The method according to claim 12, wherein After determining that it is located at the edge wave position, it further includes: Update the system information in the nearest reception window.

14. The method according to claim 10, wherein The system information associated with adjacent cells includes at least one of the following: System information associated with all adjacent cells; System information associated with some adjacent cells; System information associated with the first adjacent cell.

15. The method according to claim 10, characterized in that, The method further includes: If the terminal is currently in an idle state or a non-active state, then receive a short message sent by the satellite base station in the paging window corresponding to the terminal; If currently in a connected state, receive the short message sent by the satellite base station in any one of the paging windows.

16. A system information broadcasting device, characterized in that, Applied to a satellite base station, the device includes: An edge wave position determination module, configured to determine the edge wave position corresponding to the first cell, where the first cell is the ground coverage area corresponding to the satellite base station, and the edge wave position is located at the edge position of the ground coverage area; A broadcast module, configured to broadcast the system information associated with the adjacent cell and the system information associated with the first cell to the edge wave position during the process of broadcasting system information to the coverage area through a satellite beam.

17. An electronic device, characterized in that, The device includes: 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 are executed by the at least one processor to enable the at least one processor to execute the method according to any one of claims 1-9.

18. A terminal, characterized in that, The terminal includes: 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 are executed by the at least one processor to enable the at least one processor to execute the method according to any one of claims 10-15.

19. A computer storage medium, characterized in that, The computer storage medium stores a computer program, and the computer program is used to cause a computer to execute the method according to claims 1-9, or to execute the method according to any one of claims 10-15.

20. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, the methods according to claims 1-9, or claims 10-15 are implemented.

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