Access control method and device, storage medium, and terminal

Abstract

An access control method and device, a storage medium, and a terminal, the method comprising: determining a transmission mode according to the service type of data to be transmitted; selecting corresponding access control parameters for access control according to the determined transmission mode; wherein the transmission mode includes a unicast transmission mode and a multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters. The scheme of the present invention can select different access control parameters according to services using different transmission modes when initiating services, thereby realizing different access controls, which is beneficial to improving the reliability of multicast / broadcast services.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an access control method and device, a storage medium, and a terminal. Background Art

[0002] According to existing protocol regulations, the access control scheme for user equipment (UE) when initiating a service is only for unicast services. As for broadcast / multicast services, since it is not necessary to enter the connection state when initiating a service, the existing technology does not provide an access control scheme for broadcast / multicast services.

[0003] However, with the development of communication technology, service types are constantly enriched. Some services initiated by broadcast / multicast transmission have high service requirements and require UE to enter the connected state when transmitting by broadcast / multicast transmission.

[0004] However, for the radio resource control (RRC) establishment / re-establishment process of broadcast / multicast services, there is no corresponding access control solution in the prior art, which affects the reliability of communication services. Summary of the invention

[0005] The technical problem solved by the present invention is how to improve the reliability of multicast / broadcast services.

[0006] To solve the above technical problems, an embodiment of the present invention provides an access control method, comprising: determining a transmission mode according to the service type of the data to be transmitted; selecting corresponding access control parameters for access control according to the determined transmission mode; wherein the transmission mode includes a unicast transmission mode and a multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters.

[0007] Optionally, the access control parameter includes a NAS layer access control parameter, and different transmission modes correspond to different NAS layer access control parameters.

[0008] Optionally, the access control parameters include AS layer access control parameters, and different transmission modes correspond to different AS layer access control parameters.

[0009] Optionally, the AS layer access control parameter corresponding to the multicast / broadcast transmission mode is obtained by adding an offset to the AS layer access control parameter corresponding to the unicast transmission mode.

[0010] Optionally, the access control parameters corresponding to each transmission mode are obtained through at least one of protocol configuration, core network configuration and system message.

[0011] Optionally, the access control parameters include NAS layer access control parameters and AS layer access control parameters, wherein the NAS layer access control parameters include a mapping table between access types and one or more access IDs, and for the same access type, different transmission modes correspond to different AS layer access control parameters.

[0012] Optionally, the service type includes a service type that requires multicast / broadcast transmission mode for data transmission in an RRC connected state.

[0013] In order to solve the above technical problems, an embodiment of the present invention also provides an access control device, including: a determination module, used to determine the transmission mode according to the service type of the data to be transmitted; an access control module, used to select corresponding access control parameters for access control according to the determined transmission mode; wherein the transmission mode includes a unicast transmission mode and a multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters.

[0014] In order to solve the above technical problem, an embodiment of the present invention further provides a storage medium on which computer instructions are stored. When the computer instructions are executed by a processor, the steps of the above method are executed.

[0015] To solve the above technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, wherein the memory stores computer instructions that can be executed on the processor, and the processor executes the steps of the above method when executing the computer instructions.

[0016] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0017] The embodiment of the present invention provides an access control method, including: determining a transmission mode according to the service type of data to be transmitted; selecting corresponding access control parameters to perform access control according to the determined transmission mode; wherein the transmission mode includes a unicast transmission mode and a multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters. By adopting the scheme of this embodiment, different access control parameters can be selected according to services using different transmission modes when initiating services, thereby realizing different access controls, which is beneficial to improving the reliability of multicast / broadcast services. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a flow chart of an access control method according to an embodiment of the present invention;

[0019] Figure 2 It is a structural diagram of an access control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] As mentioned in the background technology, for the RRC establishment / re-establishment process of broadcast / multicast services, there is no corresponding access control solution in the prior art, which affects the reliability of communication services.

[0021] To solve the above technical problems, an embodiment of the present invention provides an access control method, comprising: determining a transmission mode according to the service type of the data to be transmitted; selecting corresponding access control parameters for access control according to the determined transmission mode; wherein the transmission mode includes a unicast transmission mode and a multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters.

[0022] By adopting the solution of this embodiment, different access control parameters can be selected according to services adopting different transmission modes when initiating services, thereby implementing different access controls, which is beneficial to improving the reliability of multicast / broadcast services.

[0023] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Figure 1 1 is a flow chart of an access control method according to an embodiment of the present invention. The solution of this embodiment can be applied to a user equipment side, such as being executed by a UE on the user equipment side. The solution of this embodiment can be applied to a downlink data transmission scenario, such as being applied to an RRC connection establishment / reestablishment application scenario triggered by a broadcast / multicast service.

[0025] Specifically, refer to Figure 1 The access control method described in this embodiment may include the following steps:

[0026] Step S101, determining a transmission mode according to the service type of the data to be transmitted;

[0027] Step S102, selecting corresponding access control parameters to perform access control according to the determined transmission mode;

[0028] The transmission modes include unicast transmission mode and multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters.

[0029] For example, in step S101, it can be determined whether to use unicast transmission mode or multicast / broadcast transmission mode according to the service type of the data to be transmitted, and if the multicast / broadcast transmission mode is used, whether the UE needs to enter the RRC connected state.

[0030] Furthermore, the data to be transmitted is downlink data to be received.

[0031] In a specific implementation, the access control parameters may include non-access stratum (NAS) access control parameters and access stratum (AS) access control parameters.

[0032] Specifically, different transmission modes correspond to different NAS layer access control parameters.

[0033] Furthermore, different transmission modes correspond to different AS layer access control parameters.

[0034] In a specific implementation, the access control parameters corresponding to each transmission mode may be obtained through protocol configuration.

[0035] For example, the protocol configures a mapping relationship between services transmitted in unicast transmission mode and NAS layer access control parameters, and also configures a mapping relationship between services transmitted in multicast / broadcast transmission mode and NAS layer access control parameters.

[0036] For a certain service type, the UE can map two sets of NAS layer access control parameters. That is, one set of parameters corresponds to unicast data transmission, and the other set of parameters corresponds to multicast / broadcast data transmission;

[0037] Furthermore, when the UE performs access control at the AS layer, it selects corresponding NAS layer access control parameters according to the data transmission mode.

[0038] For example, if data is transmitted in unicast mode, the UE selects a mapping table corresponding to the unicast mode to obtain the NAS layer access control parameters;

[0039] For another example, if data is transmitted via multicast / broadcast mode, the UE selects a mapping table corresponding to the multicast / broadcast mode to obtain NAS layer access control parameters;

[0040] In a specific implementation, the NAS layer access control parameter may include a mapping relationship table between an access category (access category) and one or more access IDs (access identities).

[0041] Furthermore, by configuring the mapping relationship between the service in the multicast / broadcast mode and the NAS layer access parameter, it is also possible to indicate that the terminal needs to receive the service in the RRC connection state through multicast / broadcast. For example, the service type includes a service type that needs to use the multicast / broadcast transmission mode for data transmission in the RRC connection state. According to whether there is a corresponding NAS layer access parameter for the multicast / broadcast transmission mode adopted by the service type, the UE can determine whether this data transmission needs to be performed in the RRC connection state.

[0042] Therefore, by adopting this implementation scheme, when initiating a service, the UE can select different NAS layer access parameters according to services using different transmission modes, thereby realizing different access controls.

[0043] In a specific implementation, the access control parameters corresponding to each transmission mode may be configured through the core network.

[0044] Specifically, for services transmitted in multicast / broadcast transmission mode, the core network can notify the terminal of the mapping relationship between services and NAS layer access control parameters through NAS signaling. Thus, the terminal can obtain the NAS layer access control parameters corresponding to the services transmitted in multicast / broadcast transmission mode.

[0045] For example, the core network may notify the terminal of the mapping relationship between the service transmitted in a multicast / broadcast transmission manner and the NAS layer access control parameters during a multicast announcement, UE re-registration, and the like.

[0046] Furthermore, when the UE performs access control at the AS layer, it may select corresponding NAS layer access control parameters according to the transmission mode of the data to be transmitted.

[0047] For example, if data is transmitted in a unicast transmission mode, the UE selects a mapping table corresponding to the unicast transmission mode to obtain a NAS layer access control parameter.

[0048] For another example, if data is transmitted via a multicast / broadcast transmission mode, the UE selects a mapping table corresponding to the multicast / broadcast transmission mode to obtain a NAS layer access control parameter.

[0049] Therefore, by adopting this implementation scheme, when initiating a service, the UE can select different NAS layer access parameters according to services using different transmission modes, thereby realizing different access controls.

[0050] In a specific implementation, the access control parameters corresponding to each transmission mode may be acquired through a system message.

[0051] Specifically, the base station configures a set of AS layer access parameters for services transmitted in a multicast / broadcast transmission mode, and the AS layer access control parameters may include uac-BarringFactor, which is used to indicate the access probability. The AS layer access control parameters may also include uac-BarringTime, which is used to calculate the minimum time interval from an access failure to the next access attempt procedure of the same access type. The AS layer access control parameters may also include uac-BarringForAccessIdentity, which is used to indicate whether each access ID is allowed to be accessed.

[0052] Furthermore, the AS layer access control parameters may be sent via system information.

[0053] Furthermore, the UE may obtain from the system information the AS layer access control parameters corresponding to the unicast transmission mode corresponding to the access type, and the AS layer access control parameters corresponding to the corresponding multicast / broadcast transmission mode.

[0054] In a specific implementation, when the UE performs access control, for the same access type, different transmission modes may correspond to different AS layer access parameters.

[0055] For example, if step S101 determines to adopt the unicast transmission mode, then step S102 uses the AS layer access control parameters corresponding to the unicast transmission mode in the system information to perform access control related operations when performing access control.

[0056] For another example, if step S101 determines to adopt the multicast / broadcast transmission mode, then step S102 uses the AS layer access control parameters corresponding to the multicast / broadcast transmission mode in the system information to perform access control related operations when performing access control.

[0057] Therefore, by adopting this implementation scheme, during the period when the UE performs access control at the AS layer, different access control parameters can be used to perform access control corresponding to different data transmission modes.

[0058] In a specific implementation, the AS layer access control parameters corresponding to the multicast / broadcast transmission mode may be obtained by adding an offset to the AS layer access control parameters corresponding to the unicast transmission mode. Thus, the protocol, core network or base station does not need to configure two different sets of access control parameters, but obtains the access control parameters for the multicast / broadcast transmission mode by adding a certain offset to the access control parameters corresponding to the existing unicast transmission mode.

[0059] For example, the uac-BarringFactor corresponding to the multicast / broadcast transmission mode may be obtained by adding the first offset (offset1) to the uac-BarringFactor corresponding to the unicast transmission mode.

[0060] Alternatively, the uac-BarringFactor corresponding to the multicast / broadcast transmission mode may be obtained by multiplying the uac-BarringFactor corresponding to the unicast transmission mode by the second offset (offset2).

[0061] For another example, the uac-BarringTime of the multicast / broadcast transmission mode may be obtained by adding a third offset (offset3) to the uac-BarringTime corresponding to the unicast transmission mode.

[0062] In a specific implementation, the UE may obtain access control parameters corresponding to the unicast transmission mode from a system message, and then calculate access control parameters corresponding to the multicast / broadcast transmission mode by adding a corresponding offset.

[0063] For example, when executing step S102, if it is a unicast transmission mode, access control is performed using an AS layer access control parameter whose access type corresponds to the unicast transmission mode.

[0064] If the transmission mode is multicast / broadcast, access control is performed by using the value obtained by adding a certain offset to the AS layer access control parameter of the access type corresponding to the unicast transmission mode.

[0065] In a typical application scenario, the UE can determine the transmission mode according to the service type of the data to be transmitted, and select the mapping relationship table corresponding to the current transmission mode from multiple mapping relationship tables configured by the protocol, core network or system message according to the determined transmission mode. The mapping relationship table includes one or more access IDs and NAS layer access parameters of the access type.

[0066] For example, the NAS layer of the UE obtains the NAS layer access parameters through the service through table mapping, or the core network notifies the UE of the mapping relationship between priority, service identification, QoS, slice and other information and the NAS layer access parameters through signaling.

[0067] Furthermore, when the UE executes step S102, according to the access type, it can obtain the AS layer access control parameters through the system message, thereby performing an access check process.

[0068] During the access control process, if the UE obtains one or more access IDs from the NAS layer and at least one of their corresponding uac-BarringForAccessIdentity is 0, the access is allowed; otherwise, the UE generates a random number and compares it with the threshold value. If it is lower than the threshold value uac-BarringFactor, the access is allowed, otherwise the access is not allowed.

[0069] If access is denied, a random number rand is generated and a timer T390 is started. After the timer T390 times out, access control can be initiated again; wherein T390 = (0.7 + 0.6*rand) * uac-BarringTime.

[0070] As described above, by adopting the solution of this embodiment, different access control parameters can be selected according to services adopting different transmission modes when initiating services, thereby implementing different access controls, which is beneficial to improving the reliability of multicast / broadcast services.

[0071] Figure 2 2 is a schematic diagram of the structure of an access control device according to an embodiment of the present invention. Those skilled in the art will appreciate that the access control device 2 described in this embodiment can be used to implement the above Figure 1 The method and technical solution described in the embodiments.

[0072] Specifically, refer to Figure 2 The access control device 2 described in this embodiment may include: a determination module 21, used to determine the transmission mode according to the service type of the data to be transmitted; an access control module 22, used to select corresponding access control parameters for access control according to the determined transmission mode; wherein the transmission mode includes a unicast transmission mode and a multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters.

[0073] For more information about the working principle and working mode of the access control device 2, please refer to the above Figure 1 The relevant description in will not be repeated here.

[0074] Furthermore, an embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and the computer instructions are executed when they are executed. Figure 1 The method and technical solution described in the illustrated embodiment. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile memory or a non-transitory memory. The storage medium may include a ROM, a RAM, a magnetic disk or an optical disk, etc.

[0075] Furthermore, an embodiment of the present invention also discloses a terminal, including a memory and a processor, wherein the memory stores computer instructions that can be executed on the processor, and the processor executes the above-mentioned Figure 1 The method and technical solution described in the illustrated embodiment.

[0076] The technical solution of this invention can be applied to 5G (5Generation) communication systems, as well as 4G and 3G communication systems, and can also be applied to various new communication systems in the future, such as 6G and 7G.

[0077] The technical solution of the present invention is also applicable to different network architectures, including but not limited to relay network architecture, dual-link architecture, Vehicle-to-Everything (vehicle-to-anything communication) architecture and other architectures.

[0078] The core network described in the embodiments of the present application may be an evolved packet core network (EPC for short), a 5G Core Network (5G Core Network), or a new core network in a future communication system. The 5G Core Network is composed of a group of devices, and implements access and mobility management functions (AMF) that implement mobility management and other functions, user plane functions (UPF) that provide packet routing and forwarding and QoS (Quality of Service) management and other functions, and session management functions (SMF) that provide session management, IP address allocation and management and other functions. The EPC may be composed of an MME that provides mobility management, gateway selection and other functions, a Serving Gateway (S-GW) that provides packet forwarding and other functions, and a PDN Gateway (P-GW) that provides terminal address allocation, rate control and other functions.

[0079] For MBS services, the core network may include several new network elements to implement functions such as data packet forwarding, MBS session management, QoS management, transmission mode switching (switching between unicast and multicast / broadcast transmission modes), etc. Another way is that the functions can be implemented by network elements in the existing core network.

[0080] The base station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, the device that provides base station functions in a 2G network includes a base transceiver station (BTS), the device that provides base station functions in a 3G network includes a node B (NodeB), the device that provides base station functions in a 4G network includes an evolved node B (evolvedNodeB, eNB), and in wireless local area networks (WLANs), the device that provides base station functions is an access point (AP), and the device that provides base station functions in 5G New Radio (NR) is a gNB, and a node B (ng-eNB) that continues to evolve, wherein the gNB and the terminal use NR technology for communication, and the ng-eNB and the terminal use E-UTRA (Evolved Universal Terrestrial Radio Access) technology for communication, and both the gNB and the ng-eNB can be connected to the 5G core network. The base station in the embodiment of the present application also includes a device that provides base station functions in a new communication system in the future.

[0081] The base station controller in the embodiment of the present application is a device for managing base stations, such as a base station controller (BSC) in a 2G network, a radio network controller (RNC) in a 3G network, and may also refer to a device for controlling and managing base stations in future new communication systems.

[0082] The network side network in the embodiment of the present invention refers to a communication network that provides communication services for a terminal, including a base station of a wireless access network, and may also include a base station controller of the wireless access network, and may also include equipment on the core network side.

[0083] The terminal in the embodiments of the present application may refer to various forms of user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, terminal equipment, wireless communication equipment, user agent or user device. The terminal equipment may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0084] The embodiment of the present application defines the unidirectional communication link from the access network to the terminal as a downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; and the unidirectional communication link from the terminal to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.

[0085] It should be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article indicates that the associated objects before and after are in an "or" relationship.

[0086] The "plurality" appearing in the embodiments of the present application refers to two or more.

[0087] The first, second, etc. descriptions appearing in the embodiments of the present application are only used for illustration and distinction of the description objects. There is no order, nor do they indicate any special limitation on the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application.

[0088] The "connection" that appears in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of the present application do not impose any limitations on this.

[0089] It should be understood that in the embodiments of the present application, the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0090] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0091] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0092] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0093] In the several embodiments provided in the present application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are merely schematic; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0094] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0095] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0096] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program codes.

[0097] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An access control method, characterized in that: include: Determine the transmission method according to the business type of the data to be transmitted; Selecting corresponding access control parameters to perform access control according to the determined transmission mode; The transmission modes include unicast transmission mode and multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters; The access control parameters include NAS layer access control parameters. Different transmission modes correspond to different NAS layer access control parameters. The core network notifies the terminal of the mapping relationship between the service and the NAS layer access control parameters through NAS signaling, so that the terminal obtains the NAS layer access control parameters corresponding to the service transmitted in the multicast / broadcast transmission mode; The selecting corresponding access control parameters to perform access control according to the determined transmission mode includes: When access control is performed at the AS layer, corresponding NAS layer access control parameters are selected according to the determined transmission mode.

2. The access control method according to claim 1, characterized in that: The access control parameters include AS layer access control parameters, and different transmission modes correspond to different AS layer access control parameters.

3. The access control method according to claim 2, characterized in that: The AS layer access control parameter corresponding to the multicast / broadcast transmission mode is obtained by adding an offset to the AS layer access control parameter corresponding to the unicast transmission mode.

4. The access control method according to claim 1, characterized in that: The access control parameters corresponding to each transmission mode are obtained through at least one of protocol configuration, core network configuration and system message.

5. The access control method according to claim 1, characterized in that: The access control parameters include NAS layer access control parameters and AS layer access control parameters, wherein the NAS layer access control parameters include a mapping relationship table between an access type and one or more access IDs. For the same access type, different transmission modes correspond to different AS layer access control parameters.

6. The access control method according to claim 1, characterized in that: The service types include service types that require multicast / broadcast transmission mode for data transmission in RRC connected state.

7. An access control device, characterized in that: include: A determination module, used to determine a transmission mode according to the service type of the data to be transmitted; An access control module, used to select corresponding access control parameters to perform access control according to the determined transmission mode; The transmission modes include unicast transmission mode and multicast / broadcast transmission mode, and different transmission modes correspond to different access control parameters; The access control parameters include NAS layer access control parameters. Different transmission modes correspond to different NAS layer access control parameters. The core network notifies the terminal of the mapping relationship between the service and the NAS layer access control parameters through NAS signaling, so that the terminal obtains the NAS layer access control parameters corresponding to the service transmitted in the multicast / broadcast transmission mode; The access control module further executes the step of: when performing access control at the AS layer, selecting corresponding NAS layer access control parameters according to the determined transmission mode.

8. A storage medium having computer instructions stored thereon, characterized in that: When the computer instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are performed.

9. A terminal comprising a memory and a processor, wherein the memory stores computer instructions that can be executed on the processor, characterized in that: When the processor executes the computer instructions, the steps of the method according to any one of claims 1 to 6 are performed.

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