Coverage enhancement configuration method in satellite communication system and network side equipment

Abstract

The invention discloses a coverage enhancement configuration method in a satellite communication system and network side equipment. The method comprises the following steps: acquiring position information and wireless capability information of different user terminals UE under a satellite base station; determining UE with a coverage enhancement requirement according to the position information; and configuring an enhancement preamble according to the UE with the coverage enhancement requirement and the wireless capability information. According to the invention, the problem that the number and capability of the connected UE used in the Msg3 enhancement preamble sequence configuration in the related technology cannot be accurately evaluated can be solved, and the random access success rate of the UE with the coverage enhancement requirement can be improved.

Description

Technical Field

[0001] The present application relates to the field of satellite communication technology, and in particular to a coverage enhancement configuration method and network-side equipment in a satellite communication system. Background Art

[0002] In the New Radio (NR) system, due to the small size of user equipment (UE), limited battery capacity, and significantly limited transmit power compared to the base station (gNB), the uplink coverage range is significantly lower than the downlink. This problem is particularly evident in satellite communication systems due to the large coverage distance. Figure 1 As shown, the 3rd Generation Partner Project (3GPP) introduced a technical solution for enhancing the coverage of uplink channels / signals, including coverage enhancement of Message 3 (Msg3), that is, for edge UEs, Msg3 is repeatedly sent multiple times to improve the coverage performance of Msg3.

[0003] 3GPP finally determined that the gNB first indicates the enhanced dedicated preamble sequence set for Msg3 to the UE through System Information Block 1 (SIB1). When the UE determines that it needs to retransmit Msg3, it selects the preamble in the enhanced dedicated preamble sequence set indicated in SIB1 to send.

[0004] Msg3 is rarely used when the UE is reestablished in the connected state. In most scenarios, it is used by idle UEs when accessing the network. Therefore, the number and capabilities of the connected UEs used in the Msg3 enhanced preamble sequence configuration in the related technology cannot accurately evaluate the number of UEs that require Msg3 enhancement. Summary of the Invention

[0005] The purpose of this application is to provide a coverage enhancement configuration method and network-side equipment in a satellite communication system, which is used to solve the problem in the related art that the number and capability of the connected UEs used in the Msg3 enhanced preamble configuration cannot be accurately evaluated in terms of the number of UEs that require Msg3 enhancement.

[0006] In a first aspect, an embodiment of the present application provides a method for configuring coverage enhancement in a satellite communication system, the method comprising:

[0007] Obtain location information and wireless capability information of different user terminals UE under the satellite base station;

[0008] Determining a UE requiring coverage enhancement according to the location information;

[0009] An enhanced preamble is configured according to the UE requiring coverage enhancement and the wireless capability information.

[0010] In some possible embodiments, configuring an enhanced preamble according to the UE requiring coverage enhancement and the radio capability information includes:

[0011] Determining the number of enhanced preambles required to be configured according to the UE with coverage enhancement requirements and the wireless capability information;

[0012] A corresponding number of preambles in the preamble set are configured as enhanced preambles.

[0013] In some possible embodiments, determining the number of enhanced preambles to be configured according to the UE requiring coverage enhancement and the radio capability information includes:

[0014] Determining a UE with enhanced coverage capability based on the wireless capability information;

[0015] The number of target UEs with enhanced coverage requirements and enhanced coverage capabilities is determined, and the number of enhanced preambles required to be configured is determined according to the number of target UEs.

[0016] In some possible embodiments, determining the number of enhanced preambles to be configured according to the number of target UEs includes:

[0017] Determine the ratio of the number of the target UEs to the total number of all UEs;

[0018] The number of enhanced preambles to be configured is determined according to the proportion and the total number of preambles in the preamble set.

[0019] In some possible embodiments, configuring a corresponding number of preambles in a preamble set as enhanced preambles includes:

[0020] The number of enhanced preambles to be configured is determined, and when the absolute value of the difference between the number of enhanced preambles configured and the number of currently configured enhanced preambles is greater than a preset threshold, the corresponding number of preambles in the preamble set are configured as enhanced preambles.

[0021] In some possible embodiments, the method further includes:

[0022] When the absolute value of the difference between the number of enhanced preambles to be configured and the number of enhanced preambles currently configured is determined to be no greater than a preset threshold, the current enhanced preamble configuration is maintained unchanged.

[0023] In some possible embodiments, the method is applied to an Operation, Maintenance and Management (OAM) entity or a core network entity.

[0024] In some possible embodiments, the method is applied to an OAM entity to obtain location information and wireless capability information of different user terminals UE under a satellite base station, including:

[0025] Periodically obtain the location information and wireless capability information of different user terminals UE under the satellite base station from the core network.

[0026] In some possible embodiments, determining the UE requiring coverage enhancement according to the location information includes:

[0027] According to the coverage areas of different edge wave positions of the satellite base station and the location information of the UE, the UE requiring coverage enhancement is determined.

[0028] In some possible embodiments, determining a UE requiring coverage enhancement according to coverage areas of different edge beam positions of the satellite base station and location information of the UE includes:

[0029] Determine the outermost N layers of wave positions of the satellite base station as edge wave positions, where N is a positive integer;

[0030] Taking the location information of the UE as the center and drawing a circle with a set radius threshold to form a circular area;

[0031] If the circular area intersects with the coverage area of ​​any edge wave position, it is determined that the UE is a UE with coverage enhancement requirement.

[0032] In some possible embodiments, the radius threshold is a distance threshold that triggers the UE to update location information.

[0033] In a second aspect, an embodiment of the present application provides a network-side device comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the coverage enhancement configuration method in the satellite communication system provided in an embodiment of the present application.

[0034] In some possible embodiments, the network side device is an operation, maintenance and management (OAM) entity or a core network entity.

[0035] In a third aspect, another embodiment of the present application further provides a network-side device, including:

[0036] The information acquisition module is used to obtain the location information and wireless capability information of different user terminals UE under the satellite base station;

[0037] An information statistics module, configured to determine a UE requiring coverage enhancement based on the location information;

[0038] The preamble configuration module is used to configure an enhanced preamble according to the UE with coverage enhancement requirements and the wireless capability information.

[0039] In a fourth aspect, another embodiment of the present application further 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 coverage enhancement configuration method in a satellite communication system provided in an embodiment of the present application.

[0040] The embodiments of the present application provide a coverage enhancement configuration method and a network-side device in a satellite communication system. By obtaining two types of information, namely, the location information and the wireless capability information of the UE from the satellite base station, the UE with coverage enhancement requirements is determined through the location information. Based on the UE with coverage enhancement requirements and the wireless capability information, the enhanced preamble is configured. This solves the problem in the related art that the Msg3 enhanced preamble configuration uses the number and capabilities of connected UEs, cannot accurately assess the number of UEs requiring Msg3 enhancement, and cannot accurately allocate / adjust enhanced preamble resources in real time. This effectively improves the utilization rate of the enhanced preamble resources and improves the random access success rate of UEs requiring Msg3 enhancement.

[0041] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings introduced below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 This is a schematic diagram of the uplink and downlink coverage differences in the new radio NR system;

[0044] Figure 2 Flowchart of a method for enhancing random access of Msg3 transmission in the related art;

[0045] Figure 3 This is a schematic diagram of an example application scenario according to an embodiment of the present application;

[0046] Figure 4 A flowchart of a coverage enhancement configuration method in a satellite communication system according to an embodiment of the present application;

[0047] Figure 5This is a statistical diagram of the number of UEs at gNB edge locations according to one embodiment of the present application;

[0048] Figure 6 A detailed flow chart of a method for configuring coverage enhancement in a satellite communication system according to one embodiment of the present application;

[0049] Figure 7 A diagram showing the network side equipment structure provided in accordance with this application;

[0050] Figure 8 This is a structural diagram of a network-side device according to another embodiment of the present application. DETAILED DESCRIPTION

[0051] To further illustrate the technical solutions provided by the embodiments of the present application, this is described in detail below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiments of the present application provide the method operation steps as shown in the following embodiments or drawings, more or fewer operation steps may be included in the method based on routine or no creative labor. In steps where there is no necessary causal relationship logically, the execution order of these steps is not limited to the execution order provided by the embodiments of the present application. During the actual processing process or when the control device is executed, the method can be executed in the order of the methods shown in the embodiments or drawings or in parallel.

[0052] Msg3 is the first physical uplink shared channel (PUSCH) transmission. Since the UE has not yet successfully accessed, the gNB cannot schedule it through the downlink control information (DCI). This requires the gNB and UE to jointly agree on a unified rule for repeated Msg3 transmission. Considering that before Msg3, only the physical random access channel (PRACH) is sent to the base station in the uplink. The existing Msg3 enhancement detailed technical solution is as follows: Figure 2 As shown, the details are as follows:

[0053] Step 1: The gNB indicates the RSRP threshold for the repeated transmission request in Msg3 and the enhanced preamble resource set additionalRACH-ConfigList to the UE in the system message SIB1. The additionalRACH-ConfigList is different from the preamble resource set rach-ConfigCommon for normal access. The two are separated from all available preamble resources and have no overlap.

[0054] Step 2: When the UE has the Msg3 enhancement capability and detects that its RSRP threshold is lower than the RSRP threshold in SIB1, it selects the enhanced preamble in additionalRACH-ConfigList to send PRACH, that is, sends Msg1;

[0055] Step 3: The gNB detects the enhanced preamble sequence of Msg3 in PRACH and indicates the number of repetitions of Msg3 in Msg2.

[0056] Step 4: The UE sends Msg3 according to the number of repetitions of Msg3 specified in Msg2.

[0057] The Msg3 enhancement scheme demonstrates that the additionalRACH-ConfigList, the Msg3 enhanced preamble resource set carried in SIB1, is a key parameter introduced in the scheme. If this parameter is configured with too many sequences, preamble resources will be wasted and access opportunities for normal UEs will be reduced. If this parameter is configured with too few sequences, cell-edge UEs will not achieve the Msg3 enhancement effect. Therefore, the proper configuration of additionalRACH-ConfigList and rach-ConfigCommon is an issue that needs to be addressed. 3GPP has not provided a unified solution, leaving it to individual vendors to implement. The existing proposal from the Radio Access Networks (RAN) Working Group 1 (WG1) indicates that the enhanced preamble resource set is determined on the gNB side based on the number of connected UEs and whether these connected UEs have Msg3 enhancement capabilities. This does not accurately assess the number of UEs requiring Msg3 enhancement.

[0058] In view of this, the present application proposes a coverage enhancement configuration method in a satellite communication system. The method is based on the network side equipment obtaining and saving two types of information from the satellite base station: the location of the idle and connected UEs and the wireless capability information. In this way, the enhanced preamble code can be configured based on the UE with coverage enhancement requirements and the wireless capability information.

[0059] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0060] The coverage enhancement configuration method in the satellite communication system in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0061] Satellite communication systems have higher requirements for UE location than terrestrial systems. After successfully accessing the network, a UE is required to report its location to the gNB (a satellite base station), which then forwards it to the core network. The core network stores the location information of all registered UEs and promptly updates the network when the UE's location changes beyond the distance threshold reported last. Furthermore, after successful registration, the UE also sends radio capability information, including the pusch-RepetitionMsg3 indicator, to the gNB. The pusch-RepetitionMsg3 indicates whether the UE has Msg3 enhanced capabilities. The gNB then reports this capability information to the core network. Even if the UE enters the idle state, as long as deregistration is not performed, both types of information remain in the core network. Therefore, the core network can obtain the location information of all idle and connected UEs, as well as both types of information for UEs with Msg3 enhanced capabilities. In response to the problems existing in the related art, this application proposes an adaptive configuration scheme of additionalRACH-ConfigList / rach-ConfigCommon based on the enhanced coverage requirements and wireless capability information of the existing network on the Operation Administration and Maintenance (OAM) side or the core network side in a satellite communication system.

[0062] The application scenarios of the embodiments of this application are as follows: Figure 3 As shown, Figure 3 The architecture of the access network, core network and operation and maintenance center network elements is given. The gNB is a satellite base station. The OAM entity can manage the gNB and core network entities at the same time. The core network entity is specifically the AMF (Access and Mobility Management Function) / UPF. The core network entity of this application can use the current registration and access process to obtain the UE's location information and wireless capability information, or the gNB can query the UE for location information and wireless capability information and report it.

[0063] It should be noted that the above system architecture is only an example of the system architecture applicable to the embodiment of the present application. Figure 3 The system architecture shown may also include other entities added or some entities reduced.

[0064] Figure 4 A flowchart of a method for configuring coverage enhancement in a satellite communication system according to an embodiment of the present application is shown, which is applied to an operation, maintenance and management (OAM) entity or a core network entity. The method includes:

[0065] Step 401: Acquire location information and wireless capability information of different user terminals UE under the satellite base station;

[0066] The core network collects UE location information and UE radio capability information. In this embodiment of the present application, the satellite base station gNB requests / inquires the UE for this location information and radio capability information during the registration process or individually. The UE then reports this location information to the gNB, including but not limited to the UE Information Response message containing the coarseLocationInfo location information; if the UE has enhanced capabilities, the UE Capability Information message contains the pusch-RepetitionMg3 UECapabilityInformation message. After receiving these two pieces of information from the UE, the gNB continues to report them to the core network. The core network stores this UE location information and radio capability information, along with the gNB ID. The location information and radio capability information appear in pairs, indexed by the Subscription Permanent Identifier (SUPI) of each UE, to ensure that they represent information from the same UE.

[0067] Step 402: determining a UE requiring coverage enhancement according to the location information;

[0068] The coverage enhancement requirement in the embodiment of the present application refers to the coverage enhancement requirement of Msg3.

[0069] In the embodiment of the present application, the coverage range of different satellite base stations can be determined. Since the location information of the UE under each different satellite base station can be obtained, it is possible to determine whether the UE is a UE that may be at an edge wave position. The UE that may be at an edge wave position includes the edge UE in the overlapping area of ​​the adjacent wave position coverage of the adjacent gNB. If it is a UE that may be at an edge wave position, it is determined that there is a need for coverage enhancement.

[0070] Step 403: Configure an enhanced preamble according to the UE requiring coverage enhancement and the wireless capability information.

[0071] Based on the UE's location information, it can be determined whether the UE is a UE that may be in the edge wave position. For the UE that may be in the edge wave position, it can be determined whether the UE supports coverage enhancement based on the wireless capability information. Therefore, based on the UE with coverage enhancement requirements and the wireless capability information, an enhanced preamble code can be configured to meet the enhanced coverage requirements.

[0072] The method provided in the embodiment of the present application can be implemented in a core network entity or in an OAM entity. Considering that the efficiency may be low when the core network is connected to a large number of satellite base stations, the OAM side is more efficient because the core network is connected to some of the base stations. When implemented in an OAM entity, the location information and wireless capability information of different user terminals UE under the satellite base station are obtained, including:

[0073] Periodically obtain the location information and wireless capability information of different user terminals UE under the satellite base station from the core network.

[0074] In the embodiment of the present application, when OAM is implemented, OAM obtains the location and wireless capability information of different UEs from the core network side. When implemented on the core network, the core network itself stores two types of information: the location and wireless capability information of idle and connected UEs. In addition, OAM or the core network can simultaneously consider the edge UEs in the overlapping area of ​​adjacent gNB adjacent waveband coverage. The present application proposes an Msg3 enhanced adaptive configuration scheme based on the existing network edge UEs and UE capabilities on the OAM or core network side in a satellite communication system. This solves the problem that when the scheme is implemented on the gNB side, the capability and location information of idle UEs and the information of UEs at the edge of adjacent wavebands of neighboring stations cannot be obtained, and the enhanced preamble resources cannot be accurately allocated / adjusted in real time. This effectively improves the utilization rate of the enhanced preamble resources and the random access success rate of UEs with Msg3 enhancement.

[0075] In the embodiment of the present application, the preamble set includes a fixed number of preambles. When configuring the preambles, a portion of the preambles is configured as enhanced preambles, and the other portion is configured as non-enhanced preambles. In order to meet the enhanced coverage requirements of a corresponding number of UEs at the edge wave positions, the embodiment of the present application configures the enhanced preambles according to the UEs with coverage enhancement requirements and the wireless capability information, including:

[0076] Determining the number of enhanced preambles required to be configured according to the UE with coverage enhancement requirements and the wireless capability information;

[0077] A corresponding number of preambles in the preamble set are configured as enhanced preambles.

[0078] Through the above enhanced preamble configuration method, it can be determined that the enhanced coverage requirements of UEs that are located at edge wave positions and support enhanced coverage can be met.

[0079] In the embodiment of the present application, determining the number of enhanced preambles to be configured based on the UE with coverage enhancement requirements and the wireless capability information includes:

[0080] Determining a UE with enhanced coverage capability based on the wireless capability information;

[0081] The number of target UEs with enhanced coverage requirements and enhanced coverage capabilities is determined, and the number of enhanced preambles required to be configured is determined according to the number of target UEs.

[0082] The coverage enhancement capability in this embodiment refers to the Msg3 coverage enhancement capability. As previously described, the UE can report radio capability information to the gNB, and the radio capability information can be used to determine whether the UE has the Msg3 enhancement capability. Specifically, if the stored UE radio capability information contains the pusch-RepetitionMsg3 parameter, the UE is considered to have the Msg3 enhancement capability. If so, the next step is to determine whether the UE is an edge-wave UE based on the UE's location information.

[0083] For UEs that may be in edge wave positions, they may or may not have Msg3 enhancement capabilities. Further screening is required based on the UE's wireless capability information to ultimately determine the number of target UEs. This allows for enhanced preamble resource configuration based on the number of target UEs to meet the needs of UEs with and supporting enhanced coverage, thereby ensuring the random access success rate of edge wave position UEs.

[0084] In some possible embodiments, determining a UE requiring coverage enhancement according to the location information includes:

[0085] According to the coverage areas of different edge wave positions of the satellite base station and the location information of the UE, the UE requiring coverage enhancement is determined.

[0086] The coverage area of ​​a satellite base station includes multiple wave positions. The wave positions at the edge of the coverage area can be defined as edge wave positions. The edge wave positions can be defined according to the size of the entire coverage area. For example, when the coverage area is large, the outermost layer of wave positions can be defined as edge wave positions. If the coverage area is small, the outermost layer of wave positions can be defined as edge wave positions. The specific configuration can be done by configuring the parameter N.

[0087] In some possible embodiments, determining a UE requiring coverage enhancement according to coverage areas of different edge beam positions of the satellite base station and location information of the UE includes:

[0088] Determining the outermost N wave positions of the satellite base station as edge wave positions;

[0089] Taking the location information of the UE as the center and drawing a circle with a set radius threshold to form a circular area;

[0090] If the circular area intersects with the coverage area of ​​any edge wave position, it is determined that the UE is a UE with coverage enhancement requirement.

[0091] In some possible embodiments, the radius threshold is a distance threshold that triggers the UE to update location information.

[0092] In the embodiment of the present application, the above N can be configured as any value between 1 and 3. The edge wave position is the outermost N wave positions covered by a satellite base station gNB. All UEs in the edge wave positions of the gNB are considered to be UEs that require Msg3 enhancement. Figure 5 The figure shows a schematic diagram of the waveband coverage of a gNB. A gNB covers 36 wavebands, and the edge wavebands are the outermost wavebands. UE3 is considered to be a UE that requires Msg3 enhancement. In the embodiment of the present application, NumMsg3EnhUE is used to represent the number of target UEs that have Msg3 enhancement requirements and Msg3 enhancement capabilities, and NumSerUE is used to represent the number of UEs covered by the gNB. Each time a target UE is determined, NumMsg3EnhUE = NumMsg3EnhUE + 1, and each time a UE covered by the gNB is determined, NumSerUE = NumSerUE + 1.

[0093] In the embodiment of the present application, the location information of the UE is taken as the center, and a circle is drawn with a set radius threshold to form a circular area; if the circular area intersects with the coverage area of ​​any edge wave position, it is determined that the UE is located at the edge wave position. Therefore, when the OAM or core network screens edge UEs, in addition to the UEs whose own positions are located at the edge wave positions, the UEs in the sub-edge wave positions of the gNB itself (the layer next to the outermost layer) and the UEs in the wave positions overlapping with the gNB2 adjacent to gNB1 (with enhanced requirements) are also screened. For the UE screening scheme for the sub-outer layer area and the adjacent wave positions of adjacent satellite base stations, a circular area is formed by taking the acquired UE location information as the center and the radius threshold ThresRad as the radius, and judging:

[0094] If the circular area intersects with the edge wave position of gNB1, the UE is considered to be a UE that needs Msg3 enhancement in gNB1, the number of Msg3 enhanced UEs NumMsg3EnhUE = NumMsg3EnhUE + 1, and the number of UEs in the gNB1 coverage area NumSerUE = NumSerUE + 1. Figure 5 Among them, UE1 will be counted in NumMsg3EnhUE and NumSerUE, and UE4 will be counted in NumMsg3EnhUE and NumSerUE.

[0095] If the circular area does not intersect with the edge wave position of gNB1, the UE is considered to be a UE that does not require Msg3 enhancement in gNB1, NumSerUE = NumMsg3EnhUE + 1, for example Figure 5 Only UE2 in will be counted towards NumSerUE.

[0096] In some possible embodiments, determining the number of enhanced preambles to be configured according to the number of target UEs includes:

[0097] Determine the ratio of the number of target UEs to the total number of all UEs, specifically by calculating the ratio of UEs with Msg3 enhanced capability and located at the gNB edge beam position RatioMsg3EnhUE:

[0098] RatioMsg3EnhUE=NumMsg3EnhUE / NumSerUE;

[0099] Determine the number of enhanced preambles NumCalMsg3 required to be configured according to the ratio RatioMsg3EnhUE and the total number of preambles NumSerUE in the preamble set;

[0100] Based on the number of enhanced preambles NumCalMsg3 required by the target UE, a corresponding number of preambles are selected from the preamble set as enhanced preambles, and the remaining preambles are configured as non-enhanced preambles.

[0101] A specific method for determining the number of enhanced preambles NumCalMsg3 required by the target UE is to multiply the total number of available preambles in the preamble set by the proportion RatioMsg3EnhUE and perform rounding operation, which is expressed as:

[0102]

[0103] The above formula is rounded up and can of course be rounded down. Taking rounding up as an example, when the total number of available preambles of the gNB is 64, RatioMsg3EnhUE = 1 / 10, then NumCalMsg3 = 7.

[0104] In some possible embodiments, the embodiment of the present application configures a corresponding number of preambles in a preamble set as enhanced preambles, including:

[0105] Determine the number of enhanced preambles NumCalMsg3 required to be configured for the target UE, and the absolute value of the difference between the number of enhanced preambles NumCurCon currently configured is greater than the preset threshold ThrChange, and configure the corresponding number of preambles in the preamble set as enhanced preambles, expressed as:

[0106] |NumCalMsg3—NumCurCon|>ThrChange;

[0107] According to the number of enhanced preambles required by the target UE, a corresponding number of enhanced preambles are reconfigured from the preamble set, and the remaining preambles are configured as non-enhanced preambles; specifically, the preambles in the preamble set are used as available preambles, the number of enhanced preambles in additionalRACH-ConfigList is reconfigured to NumCalMsg3, and the number of non-enhanced preambles in rach-ConfigCommon is reconfigured to the remaining number of preambles after deducting NumCalMsg3 from the total number of available preambles;

[0108] The satellite base station is notified of the reconfigured enhanced preamble and non-enhanced preamble, which are broadcast by the satellite base station through system messages. Specifically, OAM or the core network sends new additionalRACH-ConfigList and rach-ConfigCommon configurations to the gNB.

[0109] In some possible embodiments, the method further includes:

[0110] The absolute value of the difference between the number of enhanced preamble codes to be configured and the number of enhanced preamble codes currently configured is not greater than the preset threshold, indicating that the required number NumCalMsg3 of Msg3 enhanced preambles is within the normal floating range; the current enhanced preamble code configuration remains unchanged, which can avoid the ping-pong effect caused by frequent configuration.

[0111] After receiving the message from OAM or the core network that the additionalRACH-ConfigList and rach-ConfigCommon configurations have been updated, the gNB updates the additionalRACH-ConfigList and rach-ConfigCommon configurations in SIB1 according to the system information modification period.

[0112] The following combination Figure 6 A detailed flow chart of the coverage enhancement configuration method in a satellite communication system according to an embodiment of the present application is given as follows: Figure 6 As shown, the method includes:

[0113] Step 601: The core network collects UE location information and UE wireless capability information in real time.

[0114] Specifically, the method described in the above embodiment may be used to collect and save the UE's location information and wireless capability information.

[0115] Step 602: OAM periodically obtains all UE location information and wireless capability information from the core network;

[0116] OAM determines the UE location and wireless capability information under different gNBs based on the SUPI corresponding to these two types of information.

[0117] In step 603, the OAM or core network calculates the proportion of UEs with Msg3 enhancement capability and located at the gNB edge, as well as the required number of Msg3 enhanced preambles (NumCalMsg3), for each gNB, and obtains the new additionalRACH-ConfigList and rach-ConfigCommon configurations.

[0118] The specific method of determining the configuration of additionalRACH-ConfigList and rach-ConfigCommon is described in the above embodiment and will not be described in detail here.

[0119] Step 604: Determine whether |NumCalMsg3-NumCurCon| is greater than the threshold ThrChange. If so, execute step 605; otherwise, execute step 607.

[0120] Step 605: OAM or the core network sends the new additionalRACH-ConfigList and rach-ConfigCommon configurations to the gNB.

[0121] Step 606: The gNB updates the additionalRACH-ConfigList and rach-ConfigCommon configurations in SIB1 according to the SI modification period.

[0122] Step 607: Determine whether all gNBs have been checked. If so, proceed to step 609; otherwise, return to step 608.

[0123] Step 608: Determine the next gNB to be processed and execute step 603.

[0124] Step 609, waiting for the next cycle.

[0125] Based on the same inventive concept, the present application also provides a network side device, such as Figure 7 As shown, the device includes:

[0126] The information acquisition module 701 is used to obtain the location information and wireless capability information of different user terminals UE under the satellite base station;

[0127] An information statistics module 702 is configured to determine a UE requiring coverage enhancement according to the location information, and to determine a UE capable of coverage enhancement according to the radio capability information;

[0128] The preamble configuration module 703 is configured to configure an enhanced preamble according to the UE requiring coverage enhancement and the radio capability information.

[0129] In some possible embodiments, the preamble configuration module configures an enhanced preamble according to the UE with coverage enhancement requirements and the wireless capability information, including:

[0130] Determining the number of enhanced preambles required to be configured according to the UE with coverage enhancement requirements and the wireless capability information;

[0131] A corresponding number of preambles in the preamble set are configured as enhanced preambles.

[0132] In some possible embodiments, the preamble configuration module determines the number of enhanced preambles to be configured based on the UE with coverage enhancement requirements and the wireless capability information, including:

[0133] Determining a UE with enhanced coverage capability based on the wireless capability information;

[0134] The number of target UEs with enhanced coverage requirements and enhanced coverage capabilities is determined, and the number of enhanced preambles required to be configured is determined according to the number of target UEs.

[0135] In some possible embodiments, the preamble configuration module determines the number of enhanced preambles to be configured according to the number of target UEs, including:

[0136] Determine the ratio of the number of the target UEs to the total number of all UEs;

[0137] The number of enhanced preambles to be configured is determined according to the proportion and the total number of preambles in the preamble set.

[0138] In some possible embodiments, the preamble configuration module configures a corresponding number of preambles in the preamble set as enhanced preambles, including:

[0139] The number of enhanced preambles to be configured is determined, and when the absolute value of the difference between the number of enhanced preambles configured and the number of currently configured enhanced preambles is greater than a preset threshold, the corresponding number of preambles in the preamble set are configured as enhanced preambles.

[0140] In some possible embodiments, the preamble configuration module is further configured to:

[0141] When the absolute value of the difference between the number of enhanced preambles to be configured and the number of enhanced preambles currently configured is determined to be no greater than a preset threshold, the current enhanced preamble configuration is maintained unchanged.

[0142] In some possible embodiments, the method is applied to an Operation, Maintenance and Management (OAM) entity or a core network entity.

[0143] In some possible embodiments, the method is applied to an OAM entity, and the information acquisition module acquires location information and wireless capability information of different user terminals UE under a satellite base station, including:

[0144] Periodically obtain the location information and wireless capability information of different user terminals UE under the satellite base station from the core network.

[0145] In some possible embodiments, the information statistics module determines, according to the location information, a UE requiring coverage enhancement, including:

[0146] According to the coverage areas of different edge wave positions of the satellite base station and the location information of the UE, the UE requiring coverage enhancement is determined.

[0147] In some possible embodiments, the information statistics module determines a UE requiring coverage enhancement based on coverage areas of different edge beam positions of the satellite base station and location information of the UE, including:

[0148] Determining the outermost N wave positions of the satellite base station as edge wave positions;

[0149] Taking the location information of the UE as the center and drawing a circle with a set radius threshold to form a circular area;

[0150] If the circular area intersects with the coverage area of ​​any edge wave position, it is determined that the UE is a UE with coverage enhancement requirement.

[0151] In some possible embodiments, the radius threshold is a distance threshold that triggers the UE to update location information.

[0152] Based on the same inventive concept, the embodiment of the present application improves a network side device, such as Figure 8 As shown, the UE may include at least one processor 801 and at least one memory 802. The memory stores program code, which, when executed by the processor, causes the processor to perform the steps of the method for configuring coverage enhancement in a satellite communication system according to various exemplary embodiments of the present application as described above in this specification.

[0153] The present disclosure also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for configuring coverage enhancement in a satellite communication system provided in the above-mentioned embodiment are implemented. For example, the computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, or the like.

[0154] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0155] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A method for configuring coverage enhancement in a satellite communication system, characterized in that: The method comprises: Obtain location information and wireless capability information of different user terminals UE under the satellite base station; Determining a UE requiring coverage enhancement according to the location information; An enhanced preamble is configured according to the UE requiring coverage enhancement and the wireless capability information.

2. The method according to claim 1, characterized in that Configuring an enhanced preamble according to the UE requiring coverage enhancement and the radio capability information includes: Determining the number of enhanced preambles required to be configured according to the UE with coverage enhancement requirements and the wireless capability information; A corresponding number of preambles in the preamble set are configured as enhanced preambles.

3. The method according to claim 2, characterized in that Determining, according to the UE requiring coverage enhancement and the radio capability information, the number of enhanced preambles to be configured, including: Determining a UE with enhanced coverage capability based on the wireless capability information; The number of target UEs with enhanced coverage requirements and enhanced coverage capabilities is determined, and the number of enhanced preambles required to be configured is determined according to the number of target UEs.

4. The method according to claim 3, characterized in that Determining the number of enhanced preambles to be configured according to the number of target UEs includes: Determine the ratio of the number of the target UEs to the total number of all UEs; The number of enhanced preambles to be configured is determined according to the proportion and the total number of preambles in the preamble set.

5. The method according to claim 2, characterized in that Configure a corresponding number of preambles in the preamble set as enhanced preambles, including: The number of enhanced preambles to be configured is determined, and when the absolute value of the difference between the number of enhanced preambles configured and the number of currently configured enhanced preambles is greater than a preset threshold, the corresponding number of preambles in the preamble set are configured as enhanced preambles.

6. The method according to claim 2, characterized in that Also includes: When the absolute value of the difference between the number of enhanced preambles to be configured and the number of enhanced preambles currently configured is determined to be no greater than a preset threshold, the current enhanced preamble configuration is maintained unchanged.

7. The method according to claim 1, characterized in that The method is applied to an operation, maintenance and management (OAM) entity or a core network entity.

8. The method according to claim 7, characterized in that The method is applied to the OAM entity to obtain the location information and wireless capability information of different user terminals UE under the satellite base station, including: Periodically obtain the location information and wireless capability information of different user terminals UE under the satellite base station from the core network.

9. The method according to any one of claims 1 to 8, characterized in that: The determining, according to the location information, a UE requiring coverage enhancement includes: According to the coverage areas of different edge wave positions of the satellite base station and the location information of the UE, the UE requiring coverage enhancement is determined.

10. The method according to claim 9, characterized in that The determining, according to the coverage areas of different edge beam positions of the satellite base station and the location information of the UE, a UE requiring coverage enhancement includes: Determine the outermost N layers of wave positions of the satellite base station as edge wave positions, where N is a positive integer; Taking the location information of the UE as the center and drawing a circle with a set radius threshold to form a circular area; If the circular area intersects with the coverage area of ​​any edge wave position, it is determined that the UE is a UE with coverage enhancement requirement.

11. The method according to claim 10, characterized in that The radius threshold is a distance threshold that triggers the UE to update its location information.

12. A network side device, characterized in that: The method comprises at least one processor; and a memory in communication with 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 according to any one of claims 1 to 11.

13. The network side device according to claim 12, characterized in that: The network side device is an operation, maintenance and management (OAM) entity or a core network entity.

14. A network side device, characterized in that: include: The information acquisition module is used to obtain the location information and wireless capability information of different user terminals UE under the satellite base station; An information statistics module, configured to determine a UE requiring coverage enhancement based on the location information; The preamble configuration module is used to configure an enhanced preamble according to the UE with coverage enhancement requirements and the wireless capability information.

15. A computer storage medium, characterized in that The computer storage medium stores a computer program, and the computer program is used to enable a computer to execute the method according to any one of claims 1 to 11.

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