CN110972217A

CN110972217A - Satellite base station access control method, device and readable storage medium

Info

Publication number: CN110972217A
Application number: CN201811160924.2A
Authority: CN
Inventors: 王胡成
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-04-07
Anticipated expiration: 2038-09-30
Also published as: CN110972217B

Abstract

The invention relates to the technical field of communication, in particular to a satellite base station access control method, equipment and a readable storage medium, wherein the method comprises the following steps: if a terrestrial base station receives first indication information which is sent by a core network and does not allow User Equipment (UE) to access a satellite base station, the terrestrial base station selects a cell which does not belong to the service of the satellite base station as a switching target cell of the UE according to the first indication information, or sends first information which does not allow the user equipment to access the cell which is served by the satellite base station to the UE, so that the UE selects the cell which does not belong to the service of the satellite base station as a candidate target cell for switching according to the first information.

Description

Satellite base station access control method, device and readable storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a satellite base station access control method, a device, and a readable storage medium.

Background

Currently, 3GPP (3rd Generation Partnership Project) is researching a technology for supporting satellite access in 5G (The 5 th Generation Mobile communication system) to ensure a blind area covered by a terrestrial Mobile Network through satellite access, and at present, it is assumed that satellite access is implemented by mounting an NR (New Radio access) base station on a satellite, that is, The Radio coverage of satellite access and The Radio coverage of terrestrial access are both of NR type, however, in The prior art, when a satellite base station is supported in a 5G system, how to implement satellite base station access is also a technical problem to be solved.

Disclosure of Invention

Embodiments of the present invention provide a method, an apparatus, and a readable storage medium for controlling access to a satellite base station, so as to overcome the defect that a scheme for controlling access to a satellite base station is lacking in the prior art.

In a first aspect, a method for controlling access to a satellite base station provided in an embodiment of the present invention includes:

if a terrestrial base station receives first indication information which is sent by a core network and does not allow UE (User Equipment) to access a satellite base station, the terrestrial base station selects a cell which does not belong to the service of the satellite base station as a switching target cell of the UE according to the first indication information, or sends first information which does not allow the cell to access the service of the satellite base station to the UE, so that the UE selects the cell which does not belong to the service of the satellite base station as a candidate switching target cell according to the first information;

alternatively, the first and second electrodes may be,

if the terrestrial base station receives second indication information which is sent by the core network and allows the UE to access the satellite base station, the terrestrial base station allows a cell which belongs to the service of the satellite base station to be selected as a switching target cell of the UE according to the second indication information, or sends second information which allows the cell which belongs to the service of the satellite base station to be accessed to the UE, so that the UE is allowed to select the cell which belongs to the service of the satellite base station as a candidate target cell for switching according to the second information.

Optionally, the sending, by the terrestrial base station, the first information that does not allow access to the cell served by the satellite base station to the UE according to the first indication information includes:

the terrestrial base station carries an indication for prohibiting UE from measuring a cell served by a satellite base station in measurement configuration information, or the terrestrial base station configures the cell served by the satellite base station in the measurement information as a blacklist, wherein the cell included in the blacklist is a cell which can not be accessed by the UE;

and the terrestrial base station sends the measurement information to the UE, wherein the measurement information is the first information.

Optionally, the terrestrial base station selects, according to the first indication information, a cell not served by the satellite base station as a handover target cell of the UE, and specifically includes:

the terrestrial base station storing the first indication information in a context of the UE;

and the terrestrial base station selects a cell which does not belong to the service of the satellite base station as a switching target cell of the UE according to the first indication information stored in the context.

Optionally, the receiving, by the terrestrial base station, first indication information that does not allow the UE to access the satellite base station and is sent by the core network specifically includes:

in the process that the UE initiates a service request to the terrestrial base station, the terrestrial base station receives first indication information which is sent by the core network and does not allow the UE to access a satellite base station.

Optionally, the sending, by the terrestrial base station, second information allowing access to a cell served by the satellite base station to the UE according to the second indication information includes:

the terrestrial base station carries an indication containing permission for the UE to measure the cell served by the satellite base station in measurement configuration information, or the terrestrial base station configures the cell served by the satellite base station in measurement information;

and the terrestrial base station sends the measurement information to the UE, wherein the measurement information is the second information.

Optionally, the terrestrial base station allows, according to the second indication information, to select a cell belonging to the service of the satellite base station as a handover target cell of the UE, and specifically includes:

the terrestrial base station storing the second indication information in a context of the UE;

and the terrestrial base station allows a cell belonging to the service of the satellite base station to be selected as a handover target cell of the UE according to the second indication information stored in the context.

Optionally, the receiving, by the terrestrial base station, second indication information that allows the UE to access the satellite base station and is sent by the core network includes:

and in the process that the UE initiates a service request to the terrestrial base station, the terrestrial base station receives second indication information which is sent by the core network and allows the UE to access a satellite base station.

Optionally, the first indication information is information that is generated after the core network determines that the UE is not allowed to access the satellite base station according to information that the UE does not have the capability of accessing the satellite base station or information that indicates that the UE is not subscribed to and can access the satellite base station in subscription information of the UE;

alternatively, the first and second electrodes may be,

the second indication information is information which is generated after the core network determines to allow the UE to access the satellite base station according to the information that the UE has the capability of accessing the satellite base station and the information indicating that the UE is signed to be accessible to the satellite base station in the subscription information of the UE.

In a second aspect, an embodiment of the present invention further provides a method for controlling access to a satellite base station, where the method includes:

when the UE sends a registration request to a core network, the UE carries third indication information indicating that the UE has the capability of accessing the satellite base station;

receiving registration success information sent by the core network, wherein the registration success information carries fourth indication information which is determined by the core network according to the third indication information and allows or disallows the UE to access the satellite base station;

and the UE performs idle state cell selection according to the fourth indication information.

Optionally, the fourth indication information that allows the UE to access the satellite base station and is determined by the core network according to the third indication information, which is carried by the registration success information, is:

the core network determines information generated after the UE is allowed to access the satellite base station according to the information which is allowed to access the satellite base station in the subscription information of the UE and the third indication information;

alternatively, the first and second electrodes may be,

the fourth indication information, which is determined by the core network carried by the registration success information according to the third indication information and does not allow the UE to access the satellite base station, is:

and the core network determines the information generated after the UE is not allowed to access the satellite base station according to the information which is not allowed to access the satellite base station in the subscription information of the UE and the first indication information.

In a third aspect, an embodiment of the present invention further provides a method for controlling access to a satellite base station, where the method includes:

if first information which is sent by a terrestrial base station and does not allow access to a cell served by the satellite base station is received, the UE selects a cell which does not belong to the service of the satellite base station as a candidate target cell for switching according to the first information;

alternatively, the first and second electrodes may be,

and if second information which is transmitted by the terrestrial base station and allows the access to the cell served by the satellite base station is received, the UE selects the cell served by the satellite base station as a candidate target cell for switching according to the second information.

Optionally, before the UE receives the first information, the method further includes:

the UE sends a registration request message to a core network, the core network determines that the UE is not allowed to access the cell served by the satellite base station, and indicates third information that the UE is not allowed to access the cell served by the satellite base station to the terrestrial base station, so that the terrestrial base station sends the first information to the UE according to the third information;

alternatively, the first and second electrodes may be,

before the UE receives the second information, the method further includes:

the UE sends a registration request message to a core network, wherein the registration request message carries an indication that the UE has the capability of accessing a satellite base station, the core network determines a cell which the UE allows to access the service of the satellite base station according to the indication and information which allows to access the satellite base station in UE subscription information, and indicates fourth information which allows the UE to access the cell which the satellite base station serves to the terrestrial base station, so that the terrestrial base station sends the second information to the UE according to the fourth information.

In a fourth aspect, an embodiment of the present invention further provides a terrestrial base station apparatus, including:

a first sending unit, configured to, if first indication information sent by a core network and indicating that a user equipment UE is not allowed to access a satellite base station is received, select a cell that does not belong to a service of the satellite base station as a handover target cell of the UE according to the first indication information, or send first information indicating that the UE is not allowed to access the cell that is served by the satellite base station, so that the UE selects the cell that does not belong to the service of the satellite base station as a candidate target cell for handover according to the first information;

and a second sending unit, configured to, if second indication information that allows the UE to access the satellite base station and is sent by the core network is received, allow, according to the second indication information, to select a cell that belongs to the service of the satellite base station as a handover target cell of the UE, or send, to the UE, second information that allows access to the cell that is served by the satellite base station, so as to allow the UE to select, according to the second information, the cell that belongs to the service of the satellite base station as a candidate target cell for handover.

Optionally, the first sending unit is configured to:

carrying an indication that UE is prohibited from measuring a cell served by a satellite base station in measurement configuration information, or configuring the cell served by the satellite base station in the measurement information as a blacklist, wherein the cell included in the blacklist is a cell which is not accessible to the UE, and sending the measurement information to the UE, and the measurement information is the first information;

alternatively, the first and second electrodes may be,

the first sending unit is configured to:

and storing the first indication information in the context of the UE, and selecting a cell which does not belong to the service of the satellite base station as a switching target cell of the UE according to the first indication information stored in the context.

Optionally, the second sending unit is configured to:

the measurement configuration information carries an indication that the UE is allowed to measure the cell served by the satellite base station, or the terrestrial base station configures the cell served by the satellite base station in measurement information and sends the measurement information to the UE, wherein the measurement information is the second information;

alternatively, the first and second electrodes may be,

the second sending unit is configured to:

and storing the second indication information in the context of the UE, and allowing a cell belonging to the service of the satellite base station to be selected as a handover target cell of the UE according to the second indication information stored in the context.

In a fifth aspect, an embodiment of the present invention further provides a user equipment UE, including:

a transceiver unit, configured to carry third indication information indicating that the UE has a capability of accessing a satellite base station when sending a registration request to a core network, and receive registration success information sent by the core network, where the registration success information carries fourth indication information that the core network determines, according to the third indication information, that the UE is allowed or not allowed to access the satellite base station;

and the execution unit is used for executing idle state cell selection according to the fourth indication information.

Optionally, the fourth indication information that allows the UE to access the satellite base station and is determined by the core network according to the third indication information, which is carried by the registration success information, is: the core network determines information generated after the UE is allowed to access the satellite base station according to the information which is allowed to access the satellite base station in the subscription information of the UE and the third indication information;

alternatively, the first and second electrodes may be,

the fourth indication information, which is determined by the core network carried by the registration success information according to the third indication information and does not allow the UE to access the satellite base station, is: and the core network determines the information generated after the UE is not allowed to access the satellite base station according to the information which is not allowed to access the satellite base station in the subscription information of the UE and the first indication information.

In a sixth aspect, an embodiment of the present invention further provides a user equipment UE, including:

a first receiving unit, configured to, if first information that is sent by a terrestrial base station and does not allow access to a cell served by the satellite base station is received, select, according to the first information, a cell that does not belong to the service of the satellite base station as a candidate target cell for handover;

and the second receiving unit is used for selecting the cell which belongs to the service of the satellite base station as a candidate target cell for switching according to the second information if the second information which is sent by the terrestrial base station and allows the cell to be accessed to the service of the satellite base station is received.

Optionally, the apparatus further includes a sending unit, configured to:

sending a registration request message to a core network, wherein the core network determines that the UE is not allowed to access the cell served by the satellite base station, and indicates third information that the UE is not allowed to access the cell served by the satellite base station to the terrestrial base station, so that the terrestrial base station sends the first information to the UE according to the third information;

alternatively, the first and second electrodes may be,

and the core network is used for determining the cell which the UE allows to access the service of the satellite base station according to the indication and the information which allows to access the satellite base station in the UE subscription information, and indicating the fourth information which allows the UE to access the cell which the satellite base station serves to the terrestrial base station, so that the terrestrial base station can send the second information to the UE according to the fourth information.

In a seventh aspect, an embodiment of the present invention further provides an apparatus, including:

at least one processor, and

a memory coupled to the at least one processor;

wherein the memory stores instructions executable by the at least one processor, and the at least one processor performs the method of the first aspect or the second aspect or the third aspect by executing the instructions stored by the memory.

In an eighth aspect, the present invention further provides a readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps as described in the first aspect, the second aspect or the third aspect.

In the embodiment of the invention, after the terrestrial base station receives the first indication information which is sent by the core network and does not allow the UE to access the satellite base station, the UE may be notified that the UE is not allowed to access the satellite base station by carrying in the measurement configuration information an indication that the UE is prohibited from measuring the cell served by the satellite base station or by configuring the cell served by the satellite base station as a blacklist in the measurement information, so that the UE selects a cell not served by the satellite base station as a candidate target cell for handover, the first indication information may also be saved in the context of the UE, when the UE in the connection state moves to trigger a switching process, the terrestrial base station selects a cell which does not belong to the service of the satellite base station as a switching target cell of the UE according to the first indication information stored in the context, and further, the UE without the satellite base station access capability is prevented from accessing the cell served by the satellite base station. Therefore, the method not only provides the access control method of the satellite base station, but also reduces the probability of generating an error access flow caused by selecting the cell which belongs to the satellite base station service as the candidate target cell for switching by the UE without the access capability of the satellite base station, thereby saving the waste of network resources.

Or, after the terrestrial base station receives the second indication information which is sent by the core network and allows the UE to access the satellite base station, the measurement configuration information may carry an indication that allows the UE to measure the cell served by the satellite base station or configure the cell served by the satellite base station in the measurement information, so as to notify the UE of allowing the UE to access the satellite base station, so that the UE may select the cell served by the satellite base station as a candidate target cell for handover, or may store the second indication information in the context of the UE, and when the connected UE moves to trigger a handover procedure, the terrestrial base station selects the cell served by the satellite base station as a handover target cell of the UE according to the second indication information stored in the context, so that the UE selects the cell served by the satellite base station as a candidate target cell for handover. Therefore, the access control method of the satellite base station can be provided, and the technical effect of enabling the UE with the access capability of the satellite base station to select the cell belonging to the service of the satellite base station as the candidate target cell for switching is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

Fig. 1 is a schematic diagram of a satellite base station accessing a core network according to an embodiment of the present invention;

fig. 2 is a schematic diagram of another satellite base station access core network according to an embodiment of the present invention;

fig. 3 is a schematic diagram of another satellite base station accessing a core network according to an embodiment of the present invention;

fig. 4 is a schematic view of an application scenario provided in the embodiment of the present invention;

fig. 5 is a flowchart illustrating a first satellite base station access control method according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a second exemplary access control method for a satellite base station according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a third exemplary access control method for a satellite base station according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a fourth exemplary access control method for a satellite base station according to an embodiment of the present invention;

fig. 9 is a flowchart illustrating a fifth exemplary access control method for a satellite base station according to an embodiment of the present invention;

fig. 10 is a flowchart illustrating a sixth exemplary access control method for a satellite base station according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the technical solutions of the present invention. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments described in the present application are within the scope of the protection of the technical solution of the present invention.

The following is a brief description of the deployment of the satellite access network.

In the prior art, when a satellite access is used as a 3GPP access method, there may be three connection methods for connecting a 5G CoreNetwork, i.e., a 5G core network (hereinafter referred to as a core network), as shown in fig. 1, a first connection method is used, in the first connection method, an NR signal is generated by a gNB (5G base station) located on the ground, i.e., a terrestrial base station, and the satellite is only used as a radio remote unit, and is completely transparent to an NR protocol;

fig. 2 shows a second connection mode, in which the function of a gNB-DU (distributed unit) is implemented on a satellite. Part of the protocol of the NR is handled by the satellite. The DUs on the satellite and the ground CU (Central Unit) are connected via an F1 interface, the F1 interface being carried over the satellite radio interface SRI;

fig. 3 shows a third connection scheme, in which all the functionalities of the gNB are implemented on the satellite. The satellite and the terrestrial 5G core network are connected through a conventional N1/N2/N3 interface. The N1/N2/N3 interface is carried on top of the SRI.

In the prior art, a satellite can be accessed to a core network through the three connection methods, and when an operator network simultaneously supports terrestrial base station access and satellite base station access, a system is required to support switching of a UE between the terrestrial base station access and the satellite base station access. Because the access cost of the satellite base station is high, if the switching between the access of the terrestrial base station and the access of the satellite base station is performed according to the existing switching method, some problems may be caused, for example, a terminal which does not support the access of the satellite base station is switched to the satellite base station, not only an erroneous access flow is generated, but also network resources are wasted due to the generated erroneous access flow, and therefore, how to control the access of the satellite base station is a technical problem to be solved.

To this end, an embodiment of the present invention provides a method for controlling access to a satellite base station, where the method may be applied to a PLMN (Public Land Mobile Network) scenario shown in fig. 4, where the application scenario includes a satellite base station, a terrestrial base station, a core Network, and user equipment UE, a Network formed by the satellite base station may be referred to as a satellite access Network, a Network formed by the terrestrial base station may be referred to as a terrestrial access Network, and both the satellite base station and the terrestrial base station may access the core Network through an N2 interface.

In this scenario, if the terrestrial base station receives first indication information, which is sent by the core network and does not allow the UE to access the satellite base station, the terrestrial base station may select a cell not served by the satellite base station as a handover target cell of the UE according to the first indication information, or the terrestrial base station may send first information, which is not allowed to access the cell served by the satellite base station, to the UE according to the first indication information, so that the UE selects the cell not served by the satellite base station as a candidate target cell for handover according to the first information. If the terrestrial base station receives second indication information which is sent by the core network and allows the UE to access the satellite base station, the terrestrial base station may allow the cell belonging to the service of the satellite base station to be selected as a handover target cell of the UE according to the second indication information, or the terrestrial base station may send the second information which allows the cell belonging to the service of the satellite base station to be accessed to the UE according to the second indication information, so that the UE selects the cell belonging to the service of the satellite base station as a candidate target cell for handover according to the second information.

In this scenario, if the idle UE sends a registration request to the core network and carries third indication information indicating that the UE has a capability of accessing the satellite base station, the core network carries fourth indication information that the core network determines, according to the third indication information, to allow or disallow the UE to access the satellite base station in response to the fed-back registration success information, so that the UE performs idle cell selection according to the fourth indication information, for example, when the fourth indication information is information that the UE is allowed to access the satellite base station, the UE may select to access the satellite base station; and when the fourth indication information is information which does not allow the UE to access the satellite base station, the UE does not select to access the satellite base station.

Therefore, the method provided by the embodiment of the invention reduces the probability of generating an error access flow caused by the fact that the UE without the satellite base station access capability selects the cell belonging to the satellite base station service as the candidate target cell for switching, thereby saving the waste of network resources. The method also has the technical effect of enabling the UE with the satellite base station access capability to select the cell which belongs to the service of the satellite base station as the candidate target cell for handover.

The method for controlling access to a satellite base station according to the embodiment of the present invention is further described with reference to the application scenario shown in fig. 4.

In the embodiment of the present invention, for a case that the terrestrial base station receives the first indication information sent by the core network and not allowing the user equipment UE to access the satellite base station, the process may be performed as shown in fig. 5 or fig. 6.

Wherein, the flow shown in fig. 5 includes:

s11: UE sends a registration request message to a core network, wherein the registration request message carries an indication of UE capability;

s12: the core network receives the registration request message and acquires subscription information of the UE;

s13: if the UE does not have the capability of accessing the satellite base station or the UE subscription information indicates that the UE does not subscribe to access the satellite base station, the core network determines that the UE is not allowed to access the satellite base station;

s14: the core network sends a message of successful registration to the UE;

s15: the UE initiates a service request through the terrestrial base station, and the terrestrial base station forwards the service request to the core network;

s16: the core network sends first indication information which does not allow the UE to access the satellite base station to the terrestrial base station;

s17: the land base station carries an indication for prohibiting the UE from measuring the cell served by the satellite base station in the measurement configuration information according to the first indication information, or configures the cell served by the satellite base station as a blacklist in the measurement information;

s18: the land base station sends the measurement information to the UE;

s19: and the UE selects a cell which does not belong to the service of the satellite base station as a candidate target cell for switching according to the measurement information.

In fig. 5, On ground gNB indicates a terrestrial base station, On-board gNB indicates a satellite base station, and 5GC indicates a core network.

In the embodiment of the present invention, when the UE registers with the core network, the registration request message may carry an indication of the UE capability, for example, when the UE has a capability of accessing the satellite base station, the registration request message may carry an indication of the capability of the UE to access the satellite base station, and may also carry an indication of other capabilities that the UE has; when the UE does not have the capability of accessing the satellite bs, the UE capability indication carried in the registration request message does not include the UE capability indication of accessing the satellite bs.

The Registration Request message may specifically be a Registration Request message, where the Registration Request message carries an indication of the UE capability, that is, UE Capabilities.

After receiving the Registration request message, the terrestrial base station may forward the Registration request message to an AMF (Access and Mobility Management FuncTIon) in the core network, and after receiving the Registration request message of the UE, the core network may feed back a Registration success message to the UE, that is, the Registration success message fed back by the core network may specifically be a Registration Accept message.

After receiving the registration request message of the UE, the core network may further obtain Get UE Subscription information from a UDM (Unified Data Management), and if the UE Subscription information indicates that the UE does not subscribe to the information of the accessible satellite base station, the core network may determine that the UE is not allowed to access the satellite base station according to the information that the UE does not subscribe to the accessible satellite base station.

In the embodiment of the present invention, if the indication of the UE capability carried in the registration request message received by the core network does not include the indication of the capability of the UE to access the satellite base station, the UE is considered to have no capability of accessing the satellite base station, and then the core network may directly determine that the UE is not allowed to access the satellite base station according to the fact that the UE does not have the capability of accessing the satellite base station.

When the UE initiates a Service Request through the terrestrial base station, the terrestrial base station may forward the Service Request initiated by the UE to the core network, where the Service Request initiated by the UE may specifically be a Service Request message.

After receiving the Service Request message, the core network may send first indication information that does not allow the UE to access the satellite base station to the terrestrial base station, where the core network may send the first indication information to the terrestrial base station in a manner that the first indication information is carried when sending an Initial UE ContextSetup message to the terrestrial base station, and of course, the core network may also send the first indication information directly to the terrestrial base station or carry the first indication information through other messages.

The terrestrial base station may send, after receiving the first indication information, first information of cells not allowed to access the satellite base station service to the UE, so that the UE selects cells not belonging to the satellite base station service as candidate target cells for handover according to the first information. Wherein, the terrestrial base station transmitting the first information of the cell which is not allowed to access the service of the satellite base station to the UE can be realized by at least the following two ways.

The first mode is as follows:

after receiving the first indication information, the terrestrial base station carries an indication that prohibits the UE from measuring the cell served by the satellite base station in the measurement configuration information, and then sends the measurement information carrying the indication to the UE, where the measurement information carrying the indication that prohibits the UE from measuring the cell served by the satellite base station is the first information described above, and the terrestrial base station may send the measurement information carrying the indication that prohibits the UE from measuring the cell served by the satellite base station through an RRC Connection Reconfiguration message. Then, after receiving the measurement information, the UE does not select a cell served by the satellite base station for measurement, and therefore, the UE is prevented from selecting a cell not served by the satellite base station as a candidate target cell for handover.

The second mode is as follows:

after receiving the first indication information, the terrestrial base station may further configure a cell served by the satellite base station as a blacklist in the measurement information, where the cell included in the blacklist is a cell inaccessible to the UE. Then, the terrestrial base station sends the measurement information to the UE, where the measurement information configured with the blacklist is the first information described above, and similarly, the terrestrial base station may send the measurement information through an RRC Connection Reconfiguration message. Then, after receiving the measurement information, the UE does not select the cell served by the satellite base station included in the blacklist in the measurement information for measurement, and therefore, the UE avoids selecting a cell not served by the satellite base station as a candidate target cell for handover.

Therefore, by the above method, after the terrestrial base station receives the first indication information sent by the core network and used for disallowing the UE to access the satellite base station, the terrestrial base station may notify the UE of disallowing to access the satellite base station by carrying, in the measurement configuration information, an indication that the UE is prohibited from measuring a cell served by the satellite base station or configuring, as a blacklist, the cell served by the satellite base station in the measurement information, so that the UE selects a cell that does not belong to the service of the satellite base station as a candidate target cell for handover.

The process shown in fig. 6 includes:

s21: UE sends a registration request message to a core network, wherein the registration request message carries an indication of UE capability;

s22: the core network receives the registration request message and acquires subscription information of the UE;

s23: if the UE does not have the capability of accessing the satellite base station or the UE is indicated in subscription information of the UE that the UE does not sign a contract to access the satellite base station, the core network determines that the UE is not allowed to access the satellite base station;

s24: the core network sends a message of successful registration to the UE;

s25: the UE initiates a service request through the terrestrial base station, and the terrestrial base station forwards the service request to the core network;

s26: the core network sends first indication information which does not allow the UE to access the satellite base station to the terrestrial base station;

s27: a terrestrial base station storing first indication information in a context of the UE;

s28: when the UE in the connected state moves to trigger a switching process, the terrestrial base station selects a cell which does not belong to the service of the satellite base station as a switching target cell of the UE according to the first indication information stored in the context.

In this embodiment of the present invention, the implementation processes of the foregoing steps S21 to S26 refer to the above steps S11 to S16 in fig. 5, that is, when the UE does not have the capability of accessing the satellite base station, the UE does not include the indication of the capability of accessing the satellite base station by the UE in the indication of the UE capability carried in the registration request message, and after receiving the registration request message of the UE, the core network may determine that the UE is not allowed to access the satellite base station according to the information indicating that the UE is not subscribed to the accessible satellite base station in the UE subscription information, or the core network determines that the UE does not have the capability of accessing the satellite base station according to the indication of the UE capability carried in the registration request message that the UE is not included in the indication of the capability of accessing the satellite base station by the UE, and further determines that the UE is not allowed to access the satellite base station, which.

In the process shown in fig. 6, in the process that the UE initiates the service request through the terrestrial base station, the core network may send, to the terrestrial base station, first indication information that does not allow the UE to access the satellite base station, and similarly, the core network may send, to the terrestrial base station, the first indication information in a manner that the first indication information is carried when sending the Initial UE Context Setup message to the terrestrial base station, or may directly send the first indication information to the terrestrial base station or carry the first indication information through another message.

After receiving the first indication information, the terrestrial base station may store the first indication information in a context of the UE, and when the connected UE moves to trigger a handover procedure, the terrestrial base station selects a cell not served by the satellite base station as a handover target cell of the UE according to the first indication information stored in the context, thereby preventing the UE without the satellite base station access capability from accessing the cell served by the satellite base station.

Therefore, the method not only provides the access control method of the satellite base station, but also reduces the probability of generating an error access flow caused by selecting the cell which belongs to the satellite base station service as the candidate target cell for switching by the UE without the access capability of the satellite base station, thereby saving the waste of network resources.

In the embodiment of the present invention, the second indication information, which is sent by the core network and allows the user equipment UE to access the satellite base station, is received by the terrestrial base station, and may be performed according to the procedure shown in fig. 7 or fig. 8.

Wherein, the flow shown in fig. 7 includes:

s31: UE sends a registration request message to a core network, wherein the registration request message carries an indication that the UE has the capability of accessing a satellite base station;

s32: the core network receives the registration request message and acquires subscription information of the UE;

s33: if the subscription information of the UE indicates that the UE subscribes to the accessible satellite base station, the core network determines to allow the UE to access the satellite base station;

s34: the core network sends a message of successful registration to the UE;

s35: the UE initiates a service request through the terrestrial base station, and the terrestrial base station forwards the service request to the core network;

s36: the core network sends second indication information allowing the UE to access the satellite base station to the terrestrial base station;

s37: the land base station carries an instruction which allows the UE to measure the cell served by the satellite base station in the measurement configuration information according to the second instruction information, or configures the cell served by the satellite base station in the measurement information;

s38: the land base station sends the measurement information to the UE;

s39: and the UE selects a cell belonging to the service of the satellite base station as a candidate target cell for switching according to the measurement information.

In the embodiment of the present invention, when the UE has the capability of accessing the satellite base station, the UE may report the capability of accessing the satellite base station in a Registration Request message when registering with the core network, that is, the Registration Request message carries an indication that the UE has the capability of accessing the satellite base station, where the Registration Request message may specifically be a Registration Request message, and the Registration Request message carries an indication that the UE has the capability of accessing the satellite base station, that is, UE capabilities.

After receiving the Registration request message, the terrestrial base station may forward the Registration request message to the AMF in the core network, and after receiving the Registration request message of the UE, the core network may feed back a Registration success message to the UE, that is, the Registration success message fed back by the core network may specifically be a Registration Accept message.

After receiving the registration request message of the UE, the core network may further obtain subscription information of the UE from the UDM, and if the UE subscription information indicates that the UE subscribes to the information of the satellite base station accessible, the core network may determine to allow the UE to access the satellite base station according to the information of the satellite base station accessible by the UE subscription and the information of the capability of accessing the satellite base station of the UE carried in the registration request message.

After receiving the Service Request message, the core network may send second indication information allowing the UE to access the satellite base station to the terrestrial base station, where the core network may send the second indication information to the terrestrial base station in a manner of carrying the second indication information when sending the Initial UE Context Setup message to the terrestrial base station, and of course, the core network may also directly send the second indication information to the terrestrial base station or carry the second indication information through other messages.

The terrestrial base station, after receiving the second indication information, may send second information allowing access to the cell served by the satellite base station to the UE, so that the UE selects the cell belonging to the service of the satellite base station as a candidate target cell for handover according to the second information. Wherein, the terrestrial base station transmitting the second information of the cell allowed to access the satellite base station to the UE can be implemented at least in the following manner 1 and manner 2.

Mode 1:

after receiving the second indication information, the terrestrial base station carries, in the measurement configuration information, an indication that allows the UE to measure the cell served by the satellite base station, and then sends the measurement information carrying the indication to the UE, where the measurement information carrying the indication that allows the UE to measure the cell served by the satellite base station is the second information described above, and the terrestrial base station may send, through an RRC Connection Reconfiguration message, the measurement information carrying the indication that allows the UE to measure the cell served by the satellite base station. Then, after receiving the measurement information, the UE may select a cell served by the satellite base station to perform measurement, so as to use the cell belonging to the satellite base station as a candidate target cell for handover, thereby achieving the purpose of accessing the cell served by the satellite base station.

Mode 2:

after receiving the second indication information, the terrestrial base station may further configure the cell served by the satellite base station in the measurement information, and send the measurement information to the UE, where the measurement information of the cell configured with the satellite base station is the second information described above, and similarly, the terrestrial base station may send the measurement information through an RRC Connection Reconfiguration message. Then, after receiving the measurement information, the UE may select the cell served by the satellite base station included in the measurement information to perform measurement, so as to use the cell belonging to the satellite base station as a candidate target cell for handover, thereby achieving the purpose of accessing the cell served by the satellite base station.

Therefore, according to the above method, after the terrestrial base station receives the second indication information which is sent by the core network and allows the UE to access the satellite base station, the measurement configuration information may carry an indication that allows the UE to measure the cell served by the satellite base station or may notify the UE of allowing access to the satellite base station in a manner that the measurement configuration information includes the indication that allows the UE to measure the cell served by the satellite base station or configures the cell served by the satellite base station in the measurement information, so that the UE may select the cell served by the satellite base station as the candidate target cell for handover.

It should be noted that, if the subscription information of the UE acquired in step S32 indicates that the UE has not subscribed to the accessible satellite base station, even if the UE has the capability of accessing the satellite base station, the core network may determine that the UE is not allowed to access the satellite base station, and the subsequent processing may be performed in the flow shown in fig. 5 or fig. 6, which is not repeated here.

Wherein, the flow shown in fig. 8 includes:

s41: UE sends a registration request message to a core network, wherein the registration request message carries an indication that the UE has the capability of accessing a satellite base station;

s42: the core network receives the registration request message and acquires subscription information of the UE;

s43: if the subscription information of the UE indicates that the UE subscribes to the accessible satellite base station, the core network determines to allow the UE to access the satellite base station;

s44: the core network sends a message of successful registration to the UE;

s45: the UE initiates a service request through the terrestrial base station, and the terrestrial base station forwards the service request to the core network;

s46: the core network sends second indication information allowing the UE to access the satellite base station to the terrestrial base station;

s47: the terrestrial base station storing the second indication information in a context of the UE;

s48: and when the UE in the connected state moves to trigger a switching process, the terrestrial base station selects a cell belonging to the service of the satellite base station as a switching target cell of the UE according to the second indication information stored in the context.

In this embodiment of the present invention, the implementation process of the above steps S41 to S46 refers to steps S31 to S36 in fig. 7, that is, when the UE has the capability of accessing the satellite bs, the UE may carry an indication that the UE has the capability of accessing the satellite bs in the registration request message, and after receiving the registration request message of the UE, the core network may determine to allow the UE to access the satellite bs according to information indicating that the UE signs up to the accessible satellite bs in the UE sign up information and information that the UE carried in the registration request message has the capability of accessing the satellite bs. And will not be repeated here.

In the process shown in fig. 8, in the process that the UE initiates the service request through the terrestrial base station, the core network may send second indication information that allows the UE to access the satellite base station to the terrestrial base station, and similarly, the core network may send the second indication information to the terrestrial base station in a manner that the second indication information is carried when the Initial UE Context Setup message is sent to the terrestrial base station, or may directly send the second indication information to the terrestrial base station or carry the second indication information through another message.

After receiving the second indication information, the terrestrial base station may store the second indication information in a context of the UE, and when the connected UE moves to trigger a handover procedure, the terrestrial base station selects a cell belonging to the service of the satellite base station as a handover target cell of the UE according to the second indication information stored in the context, so that the UE is accessed to the cell served by the satellite base station. Therefore, the access control method of the satellite base station is provided, and the technical effect of accessing the UE with the access capability of the satellite base station to the cell belonging to the service of the satellite base station is achieved.

In the embodiment of the present invention, when the idle UE sends the registration request to the core network and carries the third indication information indicating that the UE has the capability of accessing the satellite base station, the process may be performed according to the flow shown in fig. 9 or fig. 10.

Wherein, the flow shown in fig. 9 includes:

s51: the UE sends a registration request message to a core network, wherein the registration request message carries third indication information that the UE has the capability of accessing the satellite base station;

s52: the core network receives the registration request message and acquires subscription information of the UE;

s53: if the subscription information of the UE indicates that the UE subscribes to the accessible satellite base station, the core network determines to allow the UE to access the satellite base station;

s54: the core network sends a message of successful registration to the UE, wherein the message of successful registration carries fourth indication information allowing the UE to access the satellite base station;

s55: and the UE executes idle state cell selection according to the fourth indication information.

In the process shown in fig. 9, if the UE has the capability of accessing the satellite bs, the UE may report the capability of accessing the satellite bs in a Registration request message when registering with the core network, that is, the Registration request message carries an indication that the UE has the capability of accessing the satellite bs, where the Registration request message may specifically be a Registration request message, and the Registration request message carries UE capabilities that are an indication that the UE has the capability of accessing the satellite bs.

After receiving the Registration request message of the UE, the core network may obtain subscription information of the UE from the UDM, and if the UE subscription information indicates that the UE subscribes to information of the satellite base station accessible to the UE, the core network may determine that the UE is allowed to access the satellite base station according to the information of the satellite base station accessible to the UE subscribes to the UE and third indication information that is carried in the Registration request message and that the UE has the capability of accessing the satellite base station, and carry fourth indication information that allows the UE to access the satellite base station in a Registration success message fed back to the UE, where the Registration success message fed back by the core network may specifically be Registration Accept message.

The UE performs idle cell selection according to fourth indication information carried in a Registration success message fed back by the core network, specifically, the satellite base station broadcasts different TACs, so that the UE can distinguish the satellite base station from the terrestrial base station.

Of course, in practical applications, when the UE selects the satellite base station to access the core network according to the fourth indication information, after receiving the registration request that the UE accesses the satellite base station, the core network may check the access of the UE again, for example, check whether the UE allows the access to the satellite base station.

The process shown in fig. 10 includes:

s61: the UE sends a registration request message to a core network, wherein the registration request message carries third indication information that the UE has the capability of accessing the satellite base station;

s62: the core network receives the registration request message and acquires subscription information of the UE;

s63: if the subscription information of the UE indicates that the UE is not subscribed to the accessible satellite base station, the core network determines that the UE is not allowed to access the satellite base station;

s64: the core network sends a message of successful registration to the UE, wherein the message of successful registration carries fourth indication information which does not allow the UE to access the satellite base station;

s65: and the UE executes idle state cell selection according to the fourth indication information.

In the flow shown in fig. 10, the implementation of steps S61 and S62 can refer to steps S51 and S52 in fig. 9 described above, and the description is not repeated here.

If the acquired subscription information of the UE indicates that the UE is not subscribed to access the satellite base station, the core network determines that the UE is not allowed to access the satellite base station, the fourth indication information carried in the message that the core network sends the registration success to the UE is information that the UE is not allowed to access the satellite base station, and then the UE performs idle cell selection according to the fourth indication information that the UE is not allowed to access the satellite base station, specifically, the satellite base station enables the UE to distinguish the satellite base station from the terrestrial base station by broadcasting different TACs, then, after the UE receives fourth indication information which does not allow the access to the satellite base station from the core network, once the UE moves out of the current Registration area, the UE initiates Mobility Registration, and at the moment, the UE cannot select the satellite base station to access the core network and can select the terrestrial base station to access the core network according to the fourth indication information which does not allow the access to the satellite base station, so that the selection of the idle cell is completed.

In practical application, when the UE does not have the capability of accessing the satellite base station, the UE capability indication carried when the idle UE sends the registration request to the core network does not include the indication of the capability of accessing the satellite base station to the UE, at this time, after receiving the registration request message, the core network can determine that the UE does not have the capability of accessing the satellite base station, and then determine that the UE is not allowed to access the satellite base station, and the registration success message sent to the UE by the core network carries the indication of not allowing the UE to access the satellite base station, so the UE performs the idle cell selection according to the indication of not allowing the UE to access the satellite base station carried in the registration success message, that is, the satellite base station cannot be selected to access the core network, and can select the terrestrial base station to access the core network, and then complete the idle cell selection.

Therefore, by the method, when the UE does not have the capability of accessing the satellite base station, the core network determines that the UE is not allowed to access the satellite base station and sends the indication that the UE is determined not to be allowed to access the satellite base station to the UE, so that the UE cannot select the satellite base station to access the core network when performing the idle cell selection.

Based on the same inventive concept, embodiments of the present invention provide a terrestrial base station device, and for specific implementation of a satellite access control method of the device, reference may be made to the description of the above method embodiment, and repeated descriptions are omitted, where the device includes:

Optionally, the first sending unit is configured to:

alternatively, the first and second electrodes may be,

the first sending unit is configured to:

Optionally, the second sending unit is configured to:

alternatively, the first and second electrodes may be,

the second sending unit is configured to:

Based on the same inventive concept, an embodiment of the present invention provides a UE, where specific implementation of a satellite access control method of the UE may refer to the description in the foregoing method embodiment, and repeated descriptions are omitted, and the UE includes:

alternatively, the first and second electrodes may be,

Optionally, the apparatus further includes a sending unit, configured to:

alternatively, the first and second electrodes may be,

and the core network determines a cell which the UE allows to access the satellite base station service according to the indication and information which allows the UE to access the satellite base station in UE subscription information, and indicates fourth information which allows the UE to access the cell which the satellite base station service to the terrestrial base station, so that the terrestrial base station can send the second information to the UE according to the fourth information.

Based on the same inventive concept, an embodiment of the present invention further provides an apparatus, including:

at least one processor, and

a memory coupled to the at least one processor;

wherein the memory stores instructions executable by the at least one processor, and the at least one processor executes the instructions stored by the memory to perform the method for controlling access to a satellite base station as recited in the embodiments of the present invention.

Based on the same inventive concept, embodiments of the present invention further provide a readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the satellite base station access control method as recited in the embodiments of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A satellite base station access control method is characterized by comprising the following steps:

if a terrestrial base station receives first indication information which is sent by a core network and does not allow User Equipment (UE) to access a satellite base station, the terrestrial base station selects a cell which does not belong to the service of the satellite base station as a switching target cell of the UE according to the first indication information, or sends first information which does not allow the access of the cell which does not belong to the service of the satellite base station to the UE, so that the UE selects the cell which does not belong to the service of the satellite base station as a candidate target cell for switching according to the first information;

alternatively, the first and second electrodes may be,

2. The method of claim 1, wherein the terrestrial base station sending first information to the UE that does not allow access to the cell served by the satellite base station according to the first indication information, specifically comprising:

3. The method of claim 1, wherein the terrestrial base station selects a cell not served by the satellite base station as the handover target cell of the UE according to the first indication information, specifically comprising:

4. The method according to any of claims 1-3, wherein the terrestrial base station receives a first indication from a core network that the UE is not allowed to access the satellite base station, and specifically:

5. The method of claim 1, wherein the terrestrial base station sending second information to the UE allowing access to the cell served by the satellite base station according to the second indication information, specifically comprising:

6. The method of claim 1, wherein the terrestrial base station allows the cell served by the satellite base station to be selected as the handover target cell of the UE according to the second indication information, and specifically comprises:

7. The method of claim 1, wherein the terrestrial base station receives second indication information sent by the core network to allow the UE to access the satellite base station, specifically:

8. The method of claim 1, wherein the first indication information is information generated by the core network after determining that the UE is not allowed to access the satellite base station according to information that the UE does not have the capability of accessing the satellite base station or information that the UE is not subscribed to have access to the satellite base station in subscription information of the UE; or

9. A satellite base station access control method is characterized by comprising the following steps:

10. The method according to claim 8, wherein the fourth indication information allowing the UE to access the satellite bs, which is determined by the core network carried by the registration success information according to the third indication information, is:

alternatively, the first and second electrodes may be,

11. A satellite base station access control method is characterized by comprising the following steps:

alternatively, the first and second electrodes may be,

12. The method of claim 11, wherein prior to the UE receiving the first information, further comprising:

alternatively, the first and second electrodes may be,

before the UE receives the second information, the method further includes:

13. A terrestrial base station apparatus, comprising:

14. The apparatus of claim 13, wherein the first sending unit is to:

alternatively, the first and second electrodes may be,

the first sending unit is configured to:

15. The apparatus of claim 13, wherein the second sending unit is to:

alternatively, the first and second electrodes may be,

the second sending unit is configured to:

16. A User Equipment (UE), comprising:

17. The apparatus according to claim 16, wherein the fourth indication information that allows the UE to access the satellite base station and is determined by the core network carried by the registration success information according to the third indication information is: the core network determines information generated after the UE is allowed to access the satellite base station according to the information which is allowed to access the satellite base station in the subscription information of the UE and the third indication information;

alternatively, the first and second electrodes may be,

18. A User Equipment (UE), comprising:

19. The apparatus of claim 18, further comprising a transmitting unit to:

alternatively, the first and second electrodes may be,

20. An apparatus, comprising:

at least one processor, and

a memory coupled to the at least one processor;

wherein the memory stores instructions executable by the at least one processor, the at least one processor performing the method of any one of claims 1-12 by executing the instructions stored by the memory.

21. A readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1-12.