Method, device and storage medium for establishing feeder link

Abstract

This application provides a method, device, and storage medium for establishing a feeder link. The method includes: determining to provide a feeder service to a gateway station and broadcasting a system message about the feeder cell; and, after establishing a radio resource control (RRC) connection with the gateway station, configuring a feeder data radio bearer (DRB) for the gateway station. This method establishes a feeder link.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method, device, and storage medium for establishing a feeder link. Background Art

[0002] Satellite internet offers advantages such as wide coverage and reduced vulnerability to natural disasters and physical attacks. It can be deeply integrated with terrestrial mobile communication networks, making up for the lack of coverage on terrestrial mobile networks. This creates a fusion network system with complementary advantages, close integration, and a three-dimensional layered structure, enabling global information transmission and interaction.

[0003] For satellites operating in regenerative mode, the base station is located onboard the satellite, known as a satellite-based base station. This base station connects to the gateway via a feeder link, which in turn connects to the core network. Currently, the protocol stack for the feeder interface between the satellite-based base station and the gateway is not standardized, and there is no clear method for establishing the feeder link. Summary of the Invention

[0004] The present application provides a method, device and storage medium for establishing a feeder link, which realizes the establishment of the feeder link.

[0005] In a first aspect, an embodiment of the present application provides a method for establishing a feeder link, comprising:

[0006] Determine the provision of feed services to the gateway station and broadcast system messages of the feed cell;

[0007] After a radio resource control (RRC) connection with the gateway is established, a feed data radio bearer (DRB) is configured for the gateway.

[0008] In one embodiment, determining to provide a feed service for a gateway station includes:

[0009] Determining to provide a feed service for the gateway station based on any one of configuration information or satellite control commands, wherein the configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

[0010] In one embodiment, the configuration information includes location information and / or service time information of the gateway.

[0011] In one embodiment, configuring a feed data radio bearer (DRB) for the gateway station includes:

[0012] An RRC reconfiguration message is sent to the gateway, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

[0013] In one implementation, the system message includes first indication information, where the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell.

[0014] In one implementation, the feeding cell is a dedicated feeding cell, and the access status of the feeding cell in the system message is a prohibited state.

[0015] In one embodiment, the feeding cell is a non-feeding dedicated cell; before the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a prohibited state; after the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a non-prohibited state.

[0016] In one embodiment, the method further comprises:

[0017] When it is determined to stop providing the feeding service for the gateway station, the feeding DRB and the RRC connection with the gateway station are released.

[0018] In one embodiment, the method further comprises:

[0019] When releasing the RRC connection with the gateway, the context information of the gateway is retained, and the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

[0020] In a second aspect, an embodiment of the present application provides a method for establishing a feeder link, comprising:

[0021] Searching for a feeding cell, and establishing a radio resource control (RRC) connection with the satellite base station based on the searched feeding cell;

[0022] An RRC reconfiguration message is received from the satellite-borne base station, where the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway.

[0023] In one embodiment, searching for a feeder cell includes:

[0024] The feeding cell is searched based on configuration information, where the configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

[0025] In one embodiment, the configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information.

[0026] In one embodiment, the terminal type of the gateway is indicated to the satellite base station as a gateway terminal and / or the RRC establishment cause is indicated as feed establishment in an RRC establishment request message, an RRC establishment completion message or a physical random access channel.

[0027] In one embodiment, the method further comprises:

[0028] An RRC connection release message sent by the satellite base station is received, where the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate to retain context information of the gateway.

[0029] In one embodiment, the method further comprises:

[0030] An RRC connection restoration request is sent to the satellite base station based on the context information to restore the RRC connection with the satellite base station and the feeding DRB.

[0031] In one embodiment, the method further comprises:

[0032] In the case that the feeder link between the gateway and the satellite base station is interrupted, an RRC re-establishment request message is sent to the satellite base station to restore the RRC connection with the satellite base station and the feed DRB.

[0033] In a third aspect, an embodiment of the present application provides a device for establishing a feeder link, including a memory, a transceiver, and a processor:

[0034] The memory is used to store computer programs;

[0035] The transceiver is used to send and receive data under the control of the processor;

[0036] The processor is configured to read the computer program stored in the memory and perform the following operations:

[0037] Determine the provision of feed services to the gateway station and broadcast system messages of the feed cell;

[0038] After a radio resource control (RRC) connection with the gateway is established, a feed data radio bearer (DRB) is configured for the gateway.

[0039] In one embodiment, the processor is configured to perform the following operations:

[0040] Determining to provide a feed service for the gateway station based on any one of configuration information or satellite control commands, wherein the configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

[0041] In one embodiment, the configuration information includes location information and / or service time information of the gateway.

[0042] In one embodiment, the processor is configured to perform the following operations:

[0043] An RRC reconfiguration message is sent to the gateway, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

[0044] In one implementation, the system message includes first indication information, where the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell.

[0045] In one implementation, the feeding cell is a dedicated feeding cell, and the access status of the feeding cell in the system message is a prohibited state.

[0046] In one embodiment, the feeding cell is a non-feeding dedicated cell; before the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a prohibited state; after the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a non-prohibited state.

[0047] In one embodiment, the processor is configured to perform the following operations:

[0048] When it is determined to stop providing the feeding service for the gateway station, the feeding DRB and the RRC connection with the gateway station are released.

[0049] In one embodiment, the processor is configured to perform the following operations:

[0050] When releasing the RRC connection with the gateway, the context information of the gateway is retained, and the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

[0051] In a fourth aspect, an embodiment of the present application provides a device for establishing a feeder link, including a memory, a transceiver, and a processor:

[0052] The memory is used to store computer programs;

[0053] The transceiver is used to send and receive data under the control of the processor;

[0054] The processor is configured to read the computer program stored in the memory and perform the following operations:

[0055] Searching for a feeding cell, and establishing a radio resource control (RRC) connection with the satellite base station based on the searched feeding cell;

[0056] An RRC reconfiguration message is received from the satellite-borne base station, where the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway.

[0057] In one embodiment, the processor is configured to perform the following operations:

[0058] The feeding cell is searched based on configuration information, where the configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

[0059] In one embodiment, the configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information.

[0060] In one embodiment, the terminal type of the gateway is indicated to the satellite base station as a gateway terminal and / or the RRC establishment cause is indicated as feed establishment in an RRC establishment request message, an RRC establishment completion message or a physical random access channel.

[0061] In one embodiment, the processor is configured to perform the following operations:

[0062] An RRC connection release message sent by the satellite base station is received, where the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate to retain context information of the gateway.

[0063] In one embodiment, the processor is configured to perform the following operations:

[0064] An RRC connection restoration request is sent to the satellite base station based on the context information to restore the RRC connection with the satellite base station and the feeding DRB.

[0065] In one embodiment, the processor is configured to perform the following operations:

[0066] In the case that the feeder link between the gateway and the satellite base station is interrupted, an RRC re-establishment request message is sent to the satellite base station to restore the RRC connection with the satellite base station and the feed DRB.

[0067] In a fifth aspect, an embodiment of the present application provides a device for establishing a feeder link, including:

[0068] A broadcast unit, configured to determine the provision of feed services to the gateway station and broadcast system messages of the feed cell;

[0069] The configuration unit is configured to configure a feed data radio bearer (DRB) for the gateway after a radio resource control (RRC) connection with the gateway is established.

[0070] In one embodiment, the broadcast unit is configured to:

[0071] Determining to provide a feed service for the gateway station based on any one of configuration information or satellite control commands, wherein the configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

[0072] In one embodiment, the configuration information includes location information and / or service time information of the gateway.

[0073] In one embodiment, the configuration unit is configured to:

[0074] An RRC reconfiguration message is sent to the gateway, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

[0075] In one implementation, the system message includes first indication information, where the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell.

[0076] In one implementation, the feeding cell is a dedicated feeding cell, and the access status of the feeding cell in the system message is a prohibited state.

[0077] In one embodiment, the feeding cell is a non-feeding dedicated cell; before the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a prohibited state; after the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a non-prohibited state.

[0078] In one embodiment, the apparatus further comprises:

[0079] A releasing unit is configured to release the feeding DRB and the RRC connection with the gateway when it is determined to stop providing the feeding service for the gateway.

[0080] In one embodiment, the release unit is used to:

[0081] When releasing the RRC connection with the gateway, the context information of the gateway is retained, and the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

[0082] In a sixth aspect, an embodiment of the present application provides a device for establishing a feeder link, including:

[0083] A connection unit, configured to search for a feeding cell and establish a radio resource control (RRC) connection with the satellite base station based on the searched feeding cell;

[0084] The receiving unit is configured to receive an RRC reconfiguration message sent by the satellite-borne base station, where the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway.

[0085] In one embodiment, the connecting unit is used to:

[0086] The feeding cell is searched based on configuration information, where the configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

[0087] In one embodiment, the configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information.

[0088] In one embodiment, the terminal type of the gateway is indicated to the satellite base station as a gateway terminal and / or the RRC establishment cause is indicated as feed establishment in an RRC establishment request message, an RRC establishment completion message or a physical random access channel.

[0089] In one embodiment, the receiving unit is further used to receive an RRC connection release message sent by the satellite base station, where the RRC connection release message includes second indication information, and the second indication information is used to indicate the identifier of the gateway station and / or to indicate to retain the context information of the gateway station.

[0090] In one embodiment, the apparatus further comprises:

[0091] A recovery unit is configured to send an RRC connection recovery request to the satellite base station based on the context information, so as to recover the RRC connection with the satellite base station and the feeding DRB.

[0092] In one embodiment, the apparatus further comprises:

[0093] A re-establishment unit is configured to send an RRC re-establishment request message to the satellite base station when the feeder link between the gateway and the satellite base station is interrupted, so as to restore the RRC connection with the satellite base station and the feed DRB.

[0094] In a seventh aspect, the present application provides a computer-readable storage medium storing a computer program, wherein the computer program is used to enable a computer to execute the method described in the first aspect and any embodiment or the second aspect and any embodiment.

[0095] In an eighth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the method described in the first aspect and any embodiment or the second aspect and any embodiment.

[0096] The present application provides a method, device and storage medium for establishing a feeder link. In this method, the 5G air interface is used as a feeder bearer. The satellite base station determines to provide a feeder service for the gateway station and broadcasts the system message of the feeder cell so that the gateway station can select the feeder cell as a UE for access. After the RRC connection between the satellite base station and the gateway station is established, the satellite base station configures a feeder DRB for the gateway station, thereby realizing the establishment of the feeder link.

[0097] It should be understood that the contents described in the above summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] In order to more clearly illustrate the technical solutions in this application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0099] Figure 1 A schematic diagram of a network architecture based on regenerative satellites provided in an embodiment of the present application;

[0100] Figure 2 Schematic diagram of the process of establishing a feeder link provided in the embodiment of the present application Figure 1 ;

[0101] Figure 3 Schematic diagram of the process of establishing a feeder link provided in the embodiment of the present application Figure 2 ;

[0102] Figure 4 Schematic diagram of the process of establishing a feeder link provided in the embodiment of the present application Figure 3 ;

[0103] Figure 5 Schematic diagram of the structure of the feeder link establishment device provided in the embodiment of the present application Figure 1

[0104] Figure 6 Schematic diagram of the structure of the feeder link establishment device provided in the embodiment of the present application Figure 2 ;

[0105] Figure 7 Schematic diagram of the structure of the feeder link establishment device provided in the embodiment of the present application Figure 3 ;

[0106] Figure 8 Schematic diagram of the structure of the feeder link establishment device provided in the embodiment of the present application Figure 4 . DETAILED DESCRIPTION

[0107] In this application, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship. In the embodiments of this application, the term "plurality" refers to two or more, and other quantifiers are similar.

[0108] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0109] The embodiments of the present application provide a method and apparatus for establishing a feeder link. By integrating feeder air interface technology, an efficient method for establishing a feeder link is provided. The method and apparatus are based on the same patent concept. Since the method and apparatus solve similar problems, the embodiments of the apparatus and method can refer to each other, and any repetitions will not be repeated.

[0110] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0111] The terminal device involved in the embodiments of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, or a user device, but is not limited in the embodiments of the present application.

[0112] The base station involved in the embodiment of the present application may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with a wireless terminal device through one or more sectors on the air interface, or other names. For example, the base station involved in the embodiment of the present application may be an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiment of the present application. In some network structures, the base station may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0113] Base stations and terminal devices can each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission. MIMO transmission can be either Single User MIMO (SU-MIMO) or Multi User MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or Massive-MIMO. It can also use diversity transmission, precoding, or beamforming.

[0114] Figure 1 A schematic diagram of a network architecture based on a regenerative satellite provided in an embodiment of the present application is shown in FIG. Figure 1 As shown in Figure 1, the service link between UE 101 and satellite base station 102 is the NR Uu interface. Satellite base station 102 is connected to gateway 103 (NTNgateway) via a feeder link, and further connected to core network 104. The feeder link between satellite base station 102 and gateway 103 is the Satellite Radio Interface (SRI). Currently, the protocol stack for the feeder interface between satellite base stations and gateways is not standardized in relevant protocols, and there is no clear method for establishing the feeder link.

[0115] To this end, the embodiment of the present application considers the feed air interface integration technology, uses the 5G air interface as the feed bearer, and the gateway station acts as the UE to establish a feed link with the satellite base station. Below, the method for establishing the feed link provided by the present application will be described in detail through specific embodiments. It is understandable that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0116] Figure 2 Schematic diagram of the process of establishing a feeder link provided in the embodiment of the present application Figure 1 This method is applied to satellite-borne base stations. Figure 2 As shown, the method includes:

[0117] S201: Determine to provide a power feeding service to a gateway station, and broadcast a system message of the power feeding cell.

[0118] S202: After a Radio Resource Control (RRC) connection with the gateway is established, a feed data radio bearer (DRB) is configured for the gateway.

[0119] At a specific time point or location, the satellite base station determines to start providing feeding air interface services for a certain gateway station and provide air interface coverage for the gateway station. Therefore, the satellite base station activates the feeding beam (feeding cell) and broadcasts the system message of the feeding cell so that the gateway station can select the feeding cell as a UE for access.

[0120] After establishing an RRC connection between the satellite base station and the gateway, the satellite base station configures one or more feed DRBs for the gateway. The number and configuration of these feed DRBs are determined by the satellite base station's implementation or pre-configuration. Once the feed DRB configuration is complete, i.e., the feed link is established, it can carry signaling and data from satellite terminals, other satellite base stations, and the satellite base station itself.

[0121] In this embodiment of the present application, the satellite base station determines to provide a feed service to the gateway station and broadcasts a system message of the feed cell, so that the gateway station can select the feed cell as a UE for access. After the RRC connection between the satellite base station and the gateway station is established, the satellite base station configures a feed DRB for the gateway station, thereby establishing a feed link.

[0122] Figure 3 Schematic diagram of the process of establishing a feeder link provided in the embodiment of the present application Figure 2 This method is applied to the gateway station. Figure 3 As shown, the method includes:

[0123] S301 : Search for a feeding cell, and establish a radio resource control (RRC) connection with a satellite base station based on the searched feeding cell.

[0124] S302: Receive an RRC reconfiguration message sent by the satellite base station, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

[0125] In an embodiment of the present application, the gateway station acts as a UE, initiates the search, synchronization and random access process of the feeding beam (feeding cell) at a specific time, and establishes an RRC connection with the satellite base station based on the system message of the searched feeding cell.

[0126] After the RRC connection between the gateway and the satellite base station is established, the satellite base station configures the feed DRB for the gateway through the RRC reconfiguration message, thereby establishing the feed link.

[0127] In the embodiment of the present application, the gateway station searches for the feeding cell as a UE, and establishes an RRC connection with the satellite through the feeding cell, and then completes the configuration of the feeding DRB through the RRC reconfiguration message, thereby realizing the establishment of the feeding link.

[0128] The above embodiments respectively illustrate the establishment of the feeder link from the perspectives of the satellite base station and the gateway station. In addition, after the feeder link is established, the release, re-establishment, maintenance, switching, etc. of the feeder link will also be involved. Figure 4 For explanation. Figure 4 As shown in

[0129] S401: The satellite-borne base station determines to provide a feeding service for a gateway station based on any one of configuration information or satellite control commands, and broadcasts a system message of the feeding cell.

[0130] The configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

[0131] Optionally, the configuration information includes location information and / or service time information of the gateway, and the service time information may include a service start time and an end time.

[0132] Based on the configuration information or satellite control commands, the satellite-borne base station determines the specific time point or location to start providing feeding air interface services to the gateway station, aligns the corresponding feeding beam to the gateway station, activates the configuration of the feeding cell, and starts broadcasting the system message of the feeding cell, so that the gateway station can select the feeding cell as the UE for access.

[0133] Optionally, the system message includes first indication information, and the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell, so that the gateway can determine that the cell is a feeding cell through the first indication information in the system message when searching for cells.

[0134] Optionally, if the feeding cell is a dedicated feeding cell, that is, the feeding cell only supports the gateway station as a UE access, but does not support ordinary satellite UE access, then the access status of the feeding cell in the system message of the onboard base station is prohibited, for example, the access status of the feeding cell is set to barred in the master system information block (Master Information Block, MIB), thereby preventing ordinary satellite UEs from accessing the feeding cell.

[0135] Optionally, if the feeding cell is a non-feeding dedicated cell, that is, the feeding cell not only supports the gateway station as UE access, but also supports ordinary satellite UE access, then before the satellite base station completes the configuration of the feeding DRB for the gateway station, the access status of the feeding cell in the system message of the satellite base station is prohibited. For example, the access status of the feeding cell is set to barred in the MIB, thereby preventing ordinary satellite terminals from accessing the feeding cell before the feeding DRB is established.

[0136] S402: The gateway searches for a feeding cell based on the configuration information, and establishes an RRC connection with the satellite base station based on the searched feeding cell.

[0137] The configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

[0138] Optionally, the configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information. The feed beam information may include information such as the feed beam frequency and PCI; the ephemeris information may be used to determine the satellite's position; and the feed cell service time information may include the service start time and end time.

[0139] The gateway searches for the feeding cell based on the configuration information at a specific time or when the satellite arrives at a specific location. Optionally, the gateway can determine that the cell is a feeding cell based on the first indication information in the system message of the searched cell, or the gateway can determine that the searched cell is a feeding cell based on the feeding beam information, thereby accessing the satellite base station through the feeding cell.

[0140] During the process of the gateway station accessing the satellite base station, the gateway station needs to indicate its corresponding network UE type and / or access reason to the satellite base station. Optionally, the gateway station can indicate to the satellite base station in the RRC establishment request message or the RRC establishment completion message that the terminal type of the gateway station is the gateway UE, and / or indicate that the RRC establishment reason is the feed establishment. Alternatively, the gateway station can also indicate to the satellite base station in the physical random access channel through a dedicated physical random access channel opportunity (Physical Random Access Channel Occasion, RO) or preamble that the terminal type of the gateway station is the gateway UE, and / or indicate that the RRC establishment reason is the feed establishment, thereby realizing the RRC connection establishment between the gateway station and the satellite base station.

[0141] S403: Establish a feed DRB.

[0142] Optionally, the satellite-borne base station sends an RRC reconfiguration message to the gateway station, where the RRC reconfiguration message is used to configure a feed DRB for the gateway station.

[0143] Optionally, if the feeding cell is a non-feeding dedicated cell, that is, the feeding cell not only supports the gateway station as UE access, but also supports ordinary satellite UE access, then after the satellite base station completes the configuration of the feeding DRB for the gateway station, the satellite base station updates the system message, and the access status of the feeding cell in the system message is a non-prohibited state. For example, the access status of the feeding cell is set to notbarred in the system information block 1 (System Information Block 1, SIB1), that is, the previously set barred state is canceled, so that ordinary satellites can reside and initiate services in the feeding cell.

[0144] Before the satellite base station completes configuring the feed DRB for the gateway station, the access status of the feeding cell in the system message is prohibited; after the satellite base station completes configuring the feed DRB for the gateway station, the access status of the feeding cell in the system message is non-prohibited.

[0145] S404: After the feed DRB is established, signaling and data are carried through the feed DRB.

[0146] The feed DRB can carry the satellite UE's Uu signaling, uplink and downlink data, NGAP signaling, data from other satellite base stations, as well as the satellite base station's own measurement and control data, NGAP signaling, etc.

[0147] Through the above steps, the feeder link is established, and signaling and data are carried. After the feeder link is established, if the satellite moves away from the gateway or reaches the end of service time, the onboard base station can no longer provide feed service to the gateway. In this case, the feeder link needs to be released, that is, the following step S405 is executed.

[0148] S405: When the satellite-borne base station determines to stop providing the feeding service to the gateway, it releases the feeding DRB and the RRC connection with the gateway.

[0149] The satellite-borne base station may determine to stop providing feeding services to the gateway station based on configuration information or satellite control commands. At this time, the satellite-borne base station initiates the release of the feeding DRB and RRC connection to delete the feeding link.

[0150] In one embodiment, when the satellite-borne base station releases the feeder link, it may choose not to retain the context information of the gateway station, and at the same time, it may not instruct the gateway station to retain the context information. In this case, when the satellite-borne base station provides the feeder service to the gateway station again, the feeder link establishment process is still as shown in S401-S403.

[0151] In another embodiment, when the satellite base station releases the feeder link, it may choose to retain the context of the gateway. Optionally, when the satellite base station releases the RRC connection with the gateway, the satellite base station retains the context information of the gateway, and the RRC connection release message sent by the satellite base station to the gateway includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

[0152] Optionally, when retaining the context information of the gateway, the satellite-borne base station allocates a corresponding identifier to the gateway and sends the identifier as second indication information to the gateway in an RRC connection release message, thereby instructing the gateway to retain the context information. Of course, the second indication information may also instruct the gateway to retain the context information in other forms.

[0153] If the satellite base station and the gateway retain context information, when the satellite base station provides feeding services to the gateway again, the gateway can use the retained context information to initiate a rapid recovery of the feeder link, reducing unnecessary air interface signaling overhead. For example, the gateway executes S406 below to restore the feeder link.

[0154] S406: The gateway sends an RRC connection recovery request to the satellite base station based on the context information to restore the RRC connection with the satellite base station and feed the DRB.

[0155] The release and re-establishment of the feeder link are described above through S405 and S406. In other scenarios, for example, during normal feeder service, the feeder link is interrupted and recovery of the feeder link is required. For example, the gateway executes S407 below to restore the feeder link.

[0156] S407: When the feeder link between the gateway and the satellite base station is interrupted, the gateway sends an RRC re-establishment request message to the satellite base station to restore the RRC connection with the satellite base station and feed the DRB.

[0157] For example, when the link is unstable or even the radio link fails (RLF) due to extreme weather or other reasons, the gateway UE completes the search and synchronization of the feeding beam based on the ephemeris and configuration information (such as the service time information of the feeding cell), and then completes the recovery of the feeding DRB through the RRC re-establishment process.

[0158] In addition to the aforementioned scenarios, during the satellite movement, the feed link switching will also occur, that is, the onboard base station needs to switch from the current gateway station to establish a feed link with the target gateway station.

[0159] The process of establishing a feeder link between the satellite-borne base station and the target gateway is similar to that in S401-S403 and will not be repeated here. For ordinary satellite UEs served by the satellite-borne base station, the cell remains unchanged during the feeder handover process, so the feeder link handover process is not noticeable to ordinary satellite UEs. However, during the handover process, the satellite-borne base station needs to cache uplink signaling and data from the ordinary satellite UEs it serves and send them to the core network via the new feeder link after the feeder circuit handover is completed (including path conversion).

[0160] Figure 5 Schematic diagram of the structure of the feeder link establishment device provided in the embodiment of the present application Figure 1 .like Figure 5 As shown, the device includes: a memory 501 , a transceiver 502 and a processor 503 .

[0161] Memory 501, used for storing computer programs;

[0162] a transceiver 502 for transmitting and receiving data under the control of the processor 503;

[0163] The processor 503 is configured to read the computer program stored in the memory 501 and perform the following operations:

[0164] Determine the provision of feed services to the gateway station and broadcast system messages of the feed cell;

[0165] After a radio resource control (RRC) connection with the gateway is established, a feed data radio bearer (DRB) is configured for the gateway.

[0166] In one implementation, the processor 503 is configured to perform the following operations:

[0167] Determining to provide a feed service for the gateway station based on any one of configuration information or satellite control commands, wherein the configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

[0168] In one embodiment, the configuration information includes location information and / or service time information of the gateway.

[0169] In one implementation, the processor 503 is configured to perform the following operations:

[0170] An RRC reconfiguration message is sent to the gateway, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

[0171] In one implementation, the system message includes first indication information, where the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell.

[0172] In one implementation, the feeding cell is a dedicated feeding cell, and the access status of the feeding cell in the system message is a prohibited state.

[0173] In one embodiment, the feeding cell is a non-feeding dedicated cell; before the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a prohibited state; after the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a non-prohibited state.

[0174] In one implementation, the processor 503 is configured to perform the following operations:

[0175] When it is determined to stop providing the feeding service for the gateway station, the feeding DRB and the RRC connection with the gateway station are released.

[0176] In one implementation, the processor 503 is configured to perform the following operations:

[0177] When releasing the RRC connection with the gateway, the context information of the gateway is retained, and the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

[0178] It should be noted here that the above-mentioned device provided in this application can implement all the method steps implemented by the satellite base station in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0179] Figure 6 Schematic diagram of the structure of the feeder link establishment device provided in the embodiment of the present application Figure 2 .like Figure 6 As shown, the device includes: a memory 601 , a transceiver 602 and a processor 603 .

[0180] Memory 601, used for storing computer programs;

[0181] a transceiver 602 for transmitting and receiving data under the control of the processor 603;

[0182] The processor 603 is configured to read the computer program stored in the memory 601 and perform the following operations:

[0183] Searching for a feeding cell, and establishing a radio resource control (RRC) connection with the satellite base station based on the searched feeding cell;

[0184] An RRC reconfiguration message is received from the satellite-borne base station, where the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway.

[0185] In one implementation, the processor 603 is configured to perform the following operations:

[0186] The feeding cell is searched based on configuration information, where the configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

[0187] In one embodiment, the configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information.

[0188] In one embodiment, the terminal type of the gateway is indicated to the satellite base station as a gateway terminal and / or the RRC establishment cause is indicated as feed establishment in an RRC establishment request message, an RRC establishment completion message or a physical random access channel.

[0189] In one implementation, the processor 603 is configured to perform the following operations:

[0190] An RRC connection release message sent by the satellite base station is received, where the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate to retain context information of the gateway.

[0191] In one implementation, the processor 603 is configured to perform the following operations:

[0192] An RRC connection restoration request is sent to the satellite base station based on the context information to restore the RRC connection with the satellite base station and the feeding DRB.

[0193] In one implementation, the processor 603 is configured to perform the following operations:

[0194] In the case that the feeder link between the gateway and the satellite base station is interrupted, an RRC re-establishment request message is sent to the satellite base station to restore the RRC connection with the satellite base station and the feed DRB.

[0195] It should be noted here that the above-mentioned device provided in this application can implement all the method steps implemented by the gateway station in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0196] Figure 7 Schematic diagram of the structure of the data processing device provided in the embodiment of the present application Figure 3 .like Figure 7 As shown, the device includes:

[0197] The broadcast unit 701 is configured to determine the provision of a feed service to the gateway station and broadcast system information of the feed cell;

[0198] The configuration unit 702 is configured to configure a feed data radio bearer (DRB) for the gateway after a radio resource control (RRC) connection with the gateway is established.

[0199] In one embodiment, the broadcast unit 701 is configured to:

[0200] Determining to provide a feed service for the gateway station based on any one of configuration information or satellite control commands, wherein the configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

[0201] In one embodiment, the configuration information includes location information and / or service time information of the gateway.

[0202] In one implementation, the configuration unit 702 is configured to:

[0203] An RRC reconfiguration message is sent to the gateway, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

[0204] In one implementation, the system message includes first indication information, where the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell.

[0205] In one implementation, the feeding cell is a dedicated feeding cell, and the access status of the feeding cell in the system message is a prohibited state.

[0206] In one embodiment, the feeding cell is a non-feeding dedicated cell; before the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a prohibited state; after the feeding DRB configuration is completed, the access status of the feeding cell in the system message is a non-prohibited state.

[0207] In one embodiment, the apparatus further comprises:

[0208] A releasing unit is configured to release the feeding DRB and the RRC connection with the gateway when it is determined to stop providing the feeding service for the gateway.

[0209] In one embodiment, the release unit is used to:

[0210] When releasing the RRC connection with the gateway, the context information of the gateway is retained, and the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

[0211] It should be noted here that the above-mentioned device provided in this application can implement all the method steps implemented by the satellite base station in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0212] Figure 8 Schematic diagram of the structure of the data processing device provided in the embodiment of the present application Figure 4 .like Figure 8 As shown, the device includes:

[0213] The connection unit 801 is configured to search for a feeding cell and establish a radio resource control (RRC) connection with the satellite base station based on the searched feeding cell.

[0214] The receiving unit 802 is configured to receive an RRC reconfiguration message sent by the satellite base station, where the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway.

[0215] In one embodiment, the connection unit 801 is used to:

[0216] The feeding cell is searched based on configuration information, where the configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

[0217] In one embodiment, the configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information.

[0218] In one embodiment, the terminal type of the gateway is indicated to the satellite base station as a gateway terminal and / or the RRC establishment cause is indicated as feed establishment in an RRC establishment request message, an RRC establishment completion message or a physical random access channel.

[0219] In one embodiment, the receiving unit 802 is further used to receive an RRC connection release message sent by the satellite base station, where the RRC connection release message includes second indication information, and the second indication information is used to indicate the identifier of the gateway station and / or to indicate to retain the context information of the gateway station.

[0220] In one embodiment, the apparatus further comprises:

[0221] A recovery unit is configured to send an RRC connection recovery request to the satellite base station based on the context information, so as to recover the RRC connection with the satellite base station and the feeding DRB.

[0222] In one embodiment, the apparatus further comprises:

[0223] A re-establishment unit is configured to send an RRC re-establishment request message to the satellite base station when the feeder link between the gateway and the satellite base station is interrupted, so as to restore the RRC connection with the satellite base station and the feed DRB.

[0224] It should be noted here that the above-mentioned device provided in this application can implement all the method steps implemented by the gateway station in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0225] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0226] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0227] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. The computer program is used to enable a computer to execute the method executed by the first network element or the second network element in the above method embodiment.

[0228] Computer-readable storage media can be any available media or data storage devices that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid-state drives (SSDs), etc.).

[0229] An embodiment of the present application further provides a computer program product, including a computer program, which, when executed by a processor, implements the method executed by the first network element or the second network element in the above method embodiment.

[0230] 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 and optical storage, etc.) that contain computer-usable program code.

[0231] 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 embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable 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 generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0232] These processor-executable instructions may also be stored in a processor-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 processor-readable memory produce an article of manufacture comprising an instruction device that implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0233] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0234] 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 establishing a feeder link, characterized in that: include: Determine the provision of feed services to the gateway station and broadcast system messages of the feed cell; After establishing a radio resource control (RRC) connection with the gateway, configuring a feed data radio bearer (DRB) for the gateway; Before the feed DRB configuration is completed, the access status of the feed cell in the system message is a prohibited state; after the feed DRB configuration is completed, the access status of the feed cell in the system message is set to a non-prohibited state.

2. The method according to claim 1, characterized in that The determining to provide a feed service for the gateway station includes: Determining to provide a feed service for the gateway station based on any one of configuration information or satellite control commands, wherein the configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

3. The method according to claim 2, characterized in that The configuration information includes location information and / or service time information of the gateway.

4. The method according to any one of claims 1 to 3, characterized in that The configuring a feed data radio bearer (DRB) for the gateway station includes: An RRC reconfiguration message is sent to the gateway, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

5. The method according to any one of claims 1 to 3, characterized in that The system message includes first indication information, where the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell.

6. The method according to any one of claims 1 to 3, characterized in that The method further comprises: When it is determined to stop providing the feeding service for the gateway station, the feeding DRB and the RRC connection with the gateway station are released.

7. The method according to claim 6, characterized in that The method further comprises: When releasing the RRC connection with the gateway, the context information of the gateway is retained, and the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

8. A method for establishing a feeder link, characterized in that: include: Searching for a feeding cell, and establishing a radio resource control (RRC) connection with the satellite base station based on the system message of the searched feeding cell; receiving an RRC reconfiguration message sent by the satellite base station, where the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway; Before the feed DRB configuration is completed, the access status of the feed cell in the system message is a prohibited state; after the feed DRB configuration is completed, the access status of the feed cell in the system message is set to a non-prohibited state.

9. The method according to claim 8, characterized in that The searching for the feeding cell includes: The feeding cell is searched based on configuration information, where the configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

10. The method according to claim 9, characterized in that The configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information.

11. The method according to claim 8, characterized in that Indicating to the satellite-borne base station in an RRC establishment request message, an RRC establishment completion message or a physical random access channel that the terminal type of the gateway is a gateway terminal, and / or indicating that the RRC establishment cause is a feed establishment.

12. The method according to any one of claims 8 to 11, characterized in that The method further comprises: An RRC connection release message sent by the satellite base station is received, where the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate to retain context information of the gateway.

13. The method according to claim 12, characterized in that The method further comprises: An RRC connection restoration request is sent to the satellite base station based on the context information to restore the RRC connection with the satellite base station and the feeding DRB.

14. The method according to any one of claims 8 to 11, characterized in that The method further comprises: In the case that the feeder link between the gateway and the satellite base station is interrupted, an RRC re-establishment request message is sent to the satellite base station to restore the RRC connection with the satellite base station and the feed DRB.

15. A device for establishing a feeder link, characterized in that: Includes memory, transceiver and processor: The memory is used to store computer programs; The transceiver is used to send and receive data under the control of the processor; The processor is configured to read the computer program stored in the memory and perform the following operations: Determine the provision of feed services to the gateway station and broadcast system messages of the feed cell; After establishing a radio resource control (RRC) connection with the gateway, configuring a feed data radio bearer (DRB) for the gateway; Before the feed DRB configuration is completed, the access status of the feed cell in the system message is a prohibited state; after the feed DRB configuration is completed, the access status of the feed cell in the system message is set to a non-prohibited state.

16. The device according to claim 15, characterized in that The processor is configured to perform the following operations: Determining to provide a feed service for the gateway station based on any one of configuration information or satellite control commands, wherein the configuration information is pre-configuration information or operation, maintenance and management configuration information of the satellite-borne base station.

17. The device according to claim 16, characterized in that The configuration information includes location information and / or service time information of the gateway.

18. The device according to any one of claims 15 to 17, characterized in that The processor is configured to perform the following operations: An RRC reconfiguration message is sent to the gateway, where the RRC reconfiguration message is used to configure a feed DRB for the gateway.

19. The device according to any one of claims 15 to 17, characterized in that The system message includes first indication information, where the first indication information is used to indicate that the cell corresponding to the system message is a feeding cell.

20. The device according to any one of claims 15 to 17, characterized in that The processor is configured to perform the following operations: When it is determined to stop providing the feeding service for the gateway station, the feeding DRB and the RRC connection with the gateway station are released.

21. The device according to claim 20, characterized in that The processor is configured to perform the following operations: When releasing the RRC connection with the gateway, the context information of the gateway is retained, and the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate that the context information of the gateway is retained.

22. A device for establishing a feeder link, characterized in that: Includes memory, transceiver and processor: The memory is used to store computer programs; The transceiver is used to send and receive data under the control of the processor; The processor is configured to read the computer program stored in the memory and perform the following operations: Searching for a feeding cell, and establishing a radio resource control (RRC) connection with the satellite base station based on the system message of the searched feeding cell; receiving an RRC reconfiguration message sent by the satellite base station, where the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway; Before the feed DRB configuration is completed, the access status of the feed cell in the system message is a prohibited state; after the feed DRB configuration is completed, the access status of the feed cell in the system message is set to a non-prohibited state.

23. The device according to claim 22, characterized in that The searching for the feeding cell includes: The feeding cell is searched based on configuration information, where the configuration information is pre-configuration information or operation, maintenance and management configuration information of the gateway.

24. The device according to claim 23, characterized in that The configuration information includes one or more of feed beam information, ephemeris information, and feed cell service time information.

25. The device according to claim 22, characterized in that Indicating to the satellite-borne base station in an RRC establishment request message, an RRC establishment completion message or a physical random access channel that the terminal type of the gateway is a gateway terminal, and / or indicating that the RRC establishment cause is a feed establishment.

26. The device according to any one of claims 22 to 25, characterized in that The device further comprises: An RRC connection release message sent by the satellite base station is received, where the RRC connection release message includes second indication information, where the second indication information is used to indicate an identifier of the gateway and / or to indicate to retain context information of the gateway.

27. The device according to claim 26, characterized in that The device further comprises: An RRC connection restoration request is sent to the satellite base station based on the context information to restore the RRC connection with the satellite base station and the feeding DRB.

28. The device according to any one of claims 22 to 25, characterized in that The device further comprises: In the case that the feeder link between the gateway and the satellite base station is interrupted, an RRC re-establishment request message is sent to the satellite base station to restore the RRC connection with the satellite base station and the feed DRB.

29. A device for establishing a feeder link, characterized in that: include: A broadcast unit, configured to determine the provision of feed services to the gateway station and broadcast system messages of the feed cell; a configuration unit, configured to configure a feed data radio bearer (DRB) for the gateway after a radio resource control (RRC) connection with the gateway is established; Before the feed DRB configuration is completed, the access status of the feed cell in the system message is a prohibited state; after the feed DRB configuration is completed, the access status of the feed cell in the system message is set to a non-prohibited state.

30. A device for establishing a feeder link, characterized in that: include: A connection unit, configured to search for a feeding cell and establish a radio resource control (RRC) connection with the satellite base station based on a system message of the searched feeding cell; A receiving unit, configured to receive an RRC reconfiguration message sent by the satellite base station, wherein the RRC reconfiguration message is used to configure a feed data radio bearer (DRB) for the gateway; Before the feed DRB configuration is completed, the access status of the feed cell in the system message is a prohibited state; after the feed DRB configuration is completed, the access status of the feed cell in the system message is set to a non-prohibited state.

31. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and the computer program is used to cause a computer to execute the method according to any one of claims 1 to 14.

32. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 14 when being executed by a processor.

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