CN117395646A - Function configuration method and device - Google Patents

Abstract

The invention provides a function configuration method and device, belonging to the field of communication technology. Function configuration method, applied to a terminal, the method includes: reporting its own capability request message to the network side device, the capability request message carrying the service data adaptation protocol SDAP service set required by the terminal; receiving the network side device The returned capability configuration message is used to configure the set of SDAP services available to the terminal within the service range of the network side device. The technical solution of the present invention can realize the configuration of service-oriented SDAP functions.

Description

Function configuration method and device

Technical field

The present invention relates to the field of communication technology, and in particular, to a function configuration method and device.

Background technique

Currently, the 5G protocol stack Radio Resource Control (RRC) configuration service data adaptation protocol (SDAP) function is established based on the Data Radio Bearer (DRB). In RRC signaling, the establishment of DRB is the main key. Each DRB includes the functions of SDAP (SDAP configuration) and PDCP (PDCP configuration), realizing the function definition of a DRB at different protocol layers.

The 5G method of using DRB as the main key (Main Key) is a typical "connection-oriented" method. The "connection-oriented" approach of 5G leads to the following problems in wireless networks: complex handover control, high-overhead handover (data fronthaul), rigid connection control, and does not bring substantial help to reliability. Instead, due to multiple connections (MultipleConnectivity, The introduction of MC) and dual connectivity (Dual Connectivity, DC) has resulted in more rigid control and greater system overhead.

Contents of the invention

The technical problem to be solved by the present invention is to provide a function configuration method and device that can realize the configuration of service-oriented SDAP functions.

In order to solve the above technical problems, embodiments of the present invention provide the following technical solutions:

On the one hand, embodiments of the present invention provide a function configuration method, which is applied to a terminal. The method includes:

Report its own capability request message to the network side device, where the capability request message carries the service data adaptation protocol SDAP service set required by the terminal;

Receive a capability configuration message returned by the network side device, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In some embodiments, the SDAP service set includes at least one of the following:

SDAP service-oriented functions;

Basic functions of SDAP;

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers.

In some embodiments, the basic functions of the SDAP include at least one of the following:

The data processing method is the default method;

When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value;

The packet transmission method is the default method.

In some embodiments, the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer.

An embodiment of the present invention also provides a function configuration method, which is applied to network side equipment. The method includes:

Receive a capability request message reported by the terminal, where the capability request message carries a service data adaptation protocol SDAP service set required by the terminal;

Determine the set of SDAP services available to the terminal according to the set of SDAP service capabilities it can provide;

Send a capability configuration message to the terminal, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In some embodiments, the SDAP service set includes at least one of the following:

SDAP service-oriented functions;

Basic functions of SDAP;

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers.

In some embodiments, the basic functions of the SDAP include at least one of the following:

The data processing method is the default method;

When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value;

The packet transmission method is the default method.

In some embodiments, the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer.

An embodiment of the present invention also provides a function configuration device, including a processor and a transceiver;

The transceiver is configured to report its own capability request message to the network side device. The capability request message carries the service data adaptation protocol SDAP service set required by the terminal; and receives the capability configuration message returned by the network side device. The capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In some embodiments, the SDAP service set includes at least one of the following:

SDAP service-oriented functions;

Basic functions of SDAP;

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers.

In some embodiments, the basic functions of the SDAP include at least one of the following:

The data processing method is the default method;

When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value;

The packet transmission method is the default method.

In some embodiments, the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer.

An embodiment of the present invention also provides a function configuration device, including a processor and a transceiver;

The transceiver is configured to receive a capability request message reported by a terminal, where the capability request message carries a service data adaptation protocol SDAP service set required by the terminal;

The processor is configured to determine a set of SDAP services available to the terminal based on a set of SDAP service capabilities that it can provide;

The transceiver is configured to send a capability configuration message to the terminal, and the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In some embodiments, the SDAP service set includes at least one of the following:

SDAP service-oriented functions;

Basic functions of SDAP;

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers.

In some embodiments, the basic functions of the SDAP include at least one of the following:

The data processing method is the default method;

When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value;

The packet transmission method is the default method.

In some embodiments, the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer.

Embodiments of the present invention also provide a functional configuration device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the program, it implements the above The function configuration method described above.

Embodiments of the present invention also provide a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the function configuration method as described above are implemented.

Embodiments of the present invention have the following beneficial effects:

In the above solution, through message interaction between the terminal and the network-side device, peer-to-peer SDAP function services between the terminal and the network-side device can be realized, and service-oriented configuration of the SDAP function can be realized.

Description of the drawings

Figure 1 is a schematic diagram of the mapping and reflection mapping functions of SDAP responsible for QoS flow and DRB;

Figures 2 and 3 are schematic diagrams of data transmission at each protocol layer;

Figure 4 is a schematic structural diagram of RRC signaling for configuring the SDAP function according to an embodiment of the present invention;

Figure 5 is a schematic flow chart of a function configuration method according to an embodiment of the present invention;

6 and 7 are schematic diagrams of the composition of a function configuration device according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

The design goals of Lite Network (Lite Network) and Soft (Resilient Network) for next-generation mobile communications require the design of protocol stack functions for Service Oriented (SO).

As shown in Figure 1, SDAP is responsible for the mapping and demapping of quality of service flow (QoS flow) and DRB, as well as the optional reflective mapping function (Reflective QoS flow to DRB mapping).

As shown in Figures 2 and 3, each protocol layer transmits data strictly in accordance with the upper and lower layer constraint relationships of L3/L2/L1.

In 6G, with the increase in the types of information that need to be transmitted (the 6G network is an intelligent endogenous network and needs to generate measurement information according to its own operation), in addition to business data and RRC signaling, the terminal side and the network side have peer-to-peer connections. A lot of information needs to be transferred between the entry layers (AS layer) and within the AS layer, such as configuration or update interaction of AI models, protocol sublayer status interaction, selection of appropriate protocol sublayer functions according to business characteristics, etc., all of which require 6G The protocol stack needs to have the flexibility to select functions on demand, have a unified protocol data unit (PDU) format, low redundancy overhead, and no or light connections between protocol layers.

In order to implement a flexible protocol stack, the following issues need to be solved:

1. Consistency of the peer layer protocol; the protocol between the sending end (terminal or network) and the receiving end (network or terminal) needs to be consistent.

2. The uniqueness of the inter-layer logical constraints between the lower layer (Lower Layer) and the upper layer (Upper Layer) between the protocol layers. The flexibility of the flexible protocol stack is reflected in on-demand function selection, unified protocol data unit (PDU) format, low redundancy overhead, no connection or light connection between protocol layers, and the requirements for functions and services between the lower layer and the upper layer are clear. And it's the only one.

3. The stability of air interface transmission; how the protocol stack function changes as needed to better serve the transmission of user data. No matter how the protocol sublayer functions change on demand, they need to have no impact on the physical layer. The wireless transmission of the air interface is unaware and only needs to be responsible for transmitting a data transmission block (Transport Block, TB).

Therefore, it is necessary to reconstruct the existing RRC signaling process to implement service-oriented RRC signaling configuration.

The present invention proposes a service-oriented RRC configuration scheme for SDAP functional services. This scheme configures "functional services" as the main key, carries QoS guarantee capabilities as the guide, and maps flexibly in the manner of real-time data transmission requirements. method, thereby achieving the decoupling of "control" and "use", thereby realizing flexible functions under a minimalist network.

Embodiments of the present invention provide a function configuration method and device, which can realize the configuration of service-oriented SDAP functions.

Embodiments of the present invention provide a function configuration method, which is applied to a terminal. The method includes:

Report its own capability request message to the network side device, where the capability request message carries the service data adaptation protocol SDAP service set required by the terminal;

Receive a capability configuration message returned by the network side device, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In this embodiment, through message interaction between the terminal and the network side device, peer-to-peer SDAP function services between the terminal and the network side device can be realized, and service-oriented configuration of the SDAP function can be realized. Among them, the capability request message and the capability configuration message are both RRC signaling.

In this embodiment, the functional services of SDAP in signaling can be defined in the form of an array, where the array includes but is not limited to collection, set, and enumeration types.

In this embodiment, when the functions of SDAP are defined in a service-oriented manner, RRC can uniformly number the functional services of SDAP.

Among them, SDAP functional services include:

A. Equivalent functions between the sender and the receiver. For example, according to the IP header remapping service of SDAP, the corresponding SDAP function is: the receiver and the sender need to establish a set of equivalent IP header (de)interleaving mechanisms. ( Solution) remapping mechanism, including PDU format, control packet format, control packet sending and receiving rules, etc.

B. Only a function that exists at the sender or receiver is required, such as the SDAP complete on-demand routing function: including PDU format and the mapping relationship between PDU and transmission channels.

C. Function of path-associated control: The network side needs to be configured with core algorithms or rules that can be flexibly controlled on demand by the UE side.

In some embodiments, as shown in Figure 4, the SDAP service set includes at least one of the following:

SDAP service-oriented functions (SO Function set of SDAP) are configured in the form of arrays, where arrays include but are not limited to collections, sets, and enumeration types;

Basic Function of SDAP. This part of the function can be used as the default SDAP function in RRC signaling. The relevant functions are the default functions of SDAP, including but not limited to: the processing method of data is the default method, the QoS guarantee level used in connection with the lower layer is the default value, the transmission method of data packets is the default method, etc.

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with the lower layer is configured in the form of an array, where the array includes but is not limited to collection, set, and enumeration types. The lower layer includes the media access control MAC layer, Packet Data Convergence Protocol PDCP layer and/or Radio Link Control RLC layer. This content in RRC signaling identifies the QoS guarantee requirements for data transmission in all lower layers adjacent to SDAP (such as MAC layer, PDCP/RLC layer). According to the characteristics of the downlink or uplink data that SDAP needs to transmit (comprehensive formulation based on the QoS requirements of the services that SDAP needs to support and combined with the characteristics of SDAP data packet processing), formulate a QoS guarantee level suitable for SDAP. When SDAP transmits data with its lower layer, the appropriate transmission carrier is selected for data transmission based on the configured QoS guarantee and the capabilities of the SDAP layer and its lower layer transmission carrier (such as TNL: Transport Network Layer).

In this embodiment, for the types of data packets that SDAP may transmit, the QoS guarantee level for transmitting SDAP PDU is defined. By configuring the QoS guarantee level for transmitting SDAP PDU, the terminal and base station can maintain a consistent QoS guarantee level. Terminals and base stations implement configured QoS guarantee requirements based on their respective internal SDAP-MAC direct transmission capabilities. That is, configuring soft requirements such as QoS levels and not configuring hard connections such as DRBs means that the information carried between SDAP and MAC does not need to be carried during air interface transmission, which can reduce RRC signaling overhead.

As shown in Figure 5, after the terminal accesses the network, it sends a capability request message to the network side device such as the base station. The message carries the SDAP function service set it needs SO-SDAP-Config (initiated on demand, including QoS guarantee level). ). In this way, the characteristics of the terminal processing data at the SDAP layer can be determined. For example, if the terminal is a single terminal with IoT functions (such as a water meter), the terminal only needs to support the basic functions of SDAP and the targeted QoS guarantee level.

During this process, the terminal constructs RRC signaling according to the format in Figure 4, assigns values to the corresponding fields, and records the SDAP service set and QoS guarantee level available or requested by the terminal itself. In this embodiment, the functional services of SDAP in RRC signaling are defined in the form of an array; the primary key (Main Key) configured in RRC signaling is no longer the 5G DRB, but the direct SDAP functional service (SO-SDAP-Config ), through the handshake between the terminal and the base station, to achieve peer-to-peer SDAP functional services on the terminal and base station sides; in addition, the QoS guarantee level of data transmission between SDAP-MAC is defined in the form of an array, through the handshake between the terminal and the base station , to achieve the QoS guarantee level between the peer-to-peer SDAP-MAC on the terminal side and the base station side; through the technical solution of this embodiment, flexible selection of on-demand protocol functions can be achieved; zero handover can be achieved.

In this embodiment, the terminal can use the existing RRC signaling process to perform a handshake immediately after accessing the network-side device; it can also initiate a new service application at any time during data transmission using the default configuration. The RRC used at this time The process can be a new RRC signaling process as shown in Figure 2, or an existing RRC signaling process can be used.

An embodiment of the present invention also provides a function configuration method, which is applied to network side equipment. The method includes:

Receive a capability request message reported by the terminal, where the capability request message carries a service data adaptation protocol SDAP service set required by the terminal;

Determine the set of SDAP services available to the terminal according to the set of SDAP service capabilities it can provide;

Send a capability configuration message to the terminal, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In this embodiment, after receiving the capability request message, the network side device combines the SDAP service capability set SO-SDAP-Config that the network side device itself can provide, and selects the same service as the set requested by the terminal to the terminal on the network side device. (or wireless cell) available SDAP services are then configured to the terminal through RRC signaling.

In this embodiment, through message interaction between the terminal and the network side device, peer-to-peer SDAP function services between the terminal and the network side device can be realized, and service-oriented configuration of the SDAP function can be realized. Among them, the capability request message and the capability configuration message are both RRC signaling.

In this embodiment, the functional services of SDAP in signaling can be defined in the form of an array, where the array includes but is not limited to collection, set, and enumeration types.

In this embodiment, when the functions of SDAP are defined in a service-oriented manner, RRC can uniformly number the functional services of SDAP.

Among them, SDAP functional services include:

A. Equivalent functions between the sender and the receiver. For example, according to the IP header remapping service of SDAP, the corresponding SDAP function is: the receiver and the sender need to establish a set of equivalent IP header (de)interleaving mechanisms. ( Solution) remapping mechanism, including PDU format, control packet format, control packet sending and receiving rules, etc.

B. Only a function that exists at the sender or receiver is required, such as the SDAP complete on-demand routing function: including PDU format and the mapping relationship between PDU and transmission channels.

C. Function of path-associated control: The network side needs to be configured with core algorithms or rules that can be flexibly controlled on demand by the UE side.

In some embodiments, as shown in Figure 4, the SDAP service set includes at least one of the following:

SDAP service-oriented functions (SO Function set of SDAP) are configured in the form of arrays, where arrays include but are not limited to collections, sets, and enumeration types;

Basic Function of SDAP. This part of the function can be used as the default SDAP function in RRC signaling. The relevant functions are the default functions of SDAP, including but not limited to: the processing method of data is the default method, the QoS guarantee level used in connection with the lower layer is the default value, the transmission method of data packets is the default method, etc.

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with the lower layer is configured in the form of an array, where the array includes but is not limited to collection, set, and enumeration types. The lower layer includes the media access control MAC layer, Packet Data Convergence Protocol PDCP layer and/or Radio Link Control RLC layer. This content in RRC signaling identifies the QoS guarantee requirements for data transmission in all lower layers adjacent to SDAP (such as MAC layer, PDCP/RLC layer). According to the characteristics of the downlink or uplink data that SDAP needs to transmit (comprehensive formulation based on the QoS requirements of the services that SDAP needs to support and combined with the characteristics of SDAP data packet processing), formulate a QoS guarantee level suitable for SDAP. When SDAP transmits data with its lower layer, the appropriate transmission carrier is selected for data transmission based on the configured QoS guarantee and the capabilities of the SDAP layer and its lower layer transmission carrier (such as TNL: Transport Network Layer).

In this embodiment, for the types of data packets that SDAP may transmit, the QoS guarantee level for transmitting SDAP PDU is defined. By configuring the QoS guarantee level for transmitting SDAP PDU, the terminal and base station can maintain a consistent QoS guarantee level. Terminals and base stations implement configured QoS guarantee requirements based on their respective internal SDAP-MAC direct transmission capabilities. That is, configuring soft requirements such as QoS levels and not configuring hard connections such as DRBs means that the information carried between SDAP and MAC does not need to be carried during air interface transmission, which can reduce RRC signaling overhead.

As shown in Figure 5, after the terminal accesses the network, it sends a capability request message to the network side device such as the base station. The message carries the SDAP function service set it needs SO-SDAP-Config (initiated on demand, including QoS guarantee level). ). In this way, the characteristics of the terminal processing data at the SDAP layer can be determined. For example, if the terminal is a single terminal with IoT functions (such as a water meter), the terminal only needs to support the basic functions of SDAP and the targeted QoS guarantee level.

During this process, the terminal constructs RRC signaling according to the format in Figure 4, assigns values to the corresponding fields, and records the SDAP service set and QoS guarantee level available or requested by the terminal itself. In this embodiment, the functional services of SDAP in RRC signaling are defined in the form of an array; the primary key (Main Key) configured in RRC signaling is no longer the 5G DRB, but the direct SDAP functional service (SO-SDAP-Config ), through the handshake between the terminal and the base station, to achieve peer-to-peer SDAP functional services on the terminal and base station sides; in addition, the QoS guarantee level of data transmission between SDAP-MAC is defined in the form of an array, through the handshake between the terminal and the base station , to achieve the QoS guarantee level between the peer-to-peer SDAP-MAC on the terminal side and the base station side; through the technical solution of this embodiment, flexible selection of on-demand protocol functions can be achieved; zero handover can be achieved.

In this embodiment, the terminal can use the existing RRC signaling process to perform a handshake immediately after accessing the network-side device; it can also initiate a new service application at any time during data transmission using the default configuration. The RRC used at this time The process can be a new RRC signaling process as shown in Figure 2, or an existing RRC signaling process can be used.

After the network-side device and terminal complete the process shown in Figure 5, the terminal can use the configured SDAP function service set for data transmission.

The embodiment of the present invention also provides a function configuration device, as shown in Figure 6, including a processor 22 and a transceiver 21;

The transceiver 21 is configured to report its own capability request message to the network side device, where the capability request message carries the service data adaptation protocol SDAP service set required by the terminal; receive the capability configuration message returned by the network side device, The capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In some embodiments, the SDAP service set includes at least one of the following:

SDAP service-oriented functions;

Basic functions of SDAP;

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers.

In some embodiments, the basic functions of the SDAP include at least one of the following:

The data processing method is the default method;

When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value;

The packet transmission method is the default method.

In some embodiments, the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer.

The embodiment of the present invention also provides a function configuration device, as shown in Figure 6, including a processor 22 and a transceiver 21;

The transceiver 21 is configured to receive a capability request message reported by a terminal, where the capability request message carries a service data adaptation protocol SDAP service set required by the terminal;

The processor 22 is configured to determine the set of SDAP services available to the terminal according to the set of SDAP service capabilities it can provide;

The transceiver 21 is configured to send a capability configuration message to the terminal, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In some embodiments, the SDAP service set includes at least one of the following:

SDAP service-oriented functions;

Basic functions of SDAP;

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers.

In some embodiments, the basic functions of the SDAP include at least one of the following:

The data processing method is the default method;

When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value;

The packet transmission method is the default method.

In some embodiments, the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer.

The embodiment of the present invention also provides a function configuration device, as shown in Figure 7, including a memory 31, a processor 32, and a computer program stored on the memory 31 and executable on the processor 32; When the processor 32 executes the program, the function configuration method as described above is implemented.

In some embodiments, the function configuration device is applied to the terminal, and the processor 32 is configured to report its own capability request message to the network side device, where the capability request message carries the service data adaptation protocol SDAP service set required by the terminal; Receive a capability configuration message returned by the network side device, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device.

In some embodiments, the function configuration device is applied to network side equipment, and the processor 32 is configured to receive a capability request message reported by a terminal, where the capability request message carries a service data adaptation protocol SDAP service set required by the terminal; according to The set of SDAP service capabilities it can provide determines the set of SDAP services available to the terminal; and sends a capability configuration message to the terminal, where the capability configuration message is used to configure the SDAP available to the terminal within the service range of the network side device. Service collection.

In some embodiments, the SDAP service set includes at least one of the following:

SDAP service-oriented functions;

Basic functions of SDAP;

The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers.

In some embodiments, the basic functions of the SDAP include at least one of the following:

The data processing method is the default method;

When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value;

The packet transmission method is the default method.

In some embodiments, the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer.

Embodiments of the present invention also provide a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the function configuration method as described above are implemented.

Computer-readable media includes both persistent and non-volatile, removable and non-removable media that can be implemented by any method or technology for storage of information. Information may be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), and read-only memory. (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, Magnetic tape cassettes, tape magnetic disk storage or other magnetic storage terminal devices or any other non-transmission medium may be used to store information that can be accessed by a computing terminal device. As defined in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.

The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications can also be made. should be regarded as the protection scope of the present invention.

Claims (12)

1. A function configuration method, characterized in that, applied to a terminal, the method includes: Report its own capability request message to the network side device, where the capability request message carries the service data adaptation protocol SDAP service set required by the terminal; Receive a capability configuration message returned by the network side device, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device. 2. The function configuration method according to claim 1, characterized in that the SDAP service set includes at least one of the following: SDAP service-oriented functions; Basic functions of SDAP; The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers. 3. The function configuration method according to claim 2, characterized in that the basic functions of the SDAP include at least one of the following: The data processing method is the default method; When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value; The packet transmission method is the default method. 4. The function configuration method according to claim 2, wherein the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer. 5. A function configuration method, characterized in that it is applied to network side equipment, and the method includes: Receive a capability request message reported by the terminal, where the capability request message carries a service data adaptation protocol SDAP service set required by the terminal; Determine the set of SDAP services available to the terminal according to the set of SDAP service capabilities it can provide; Send a capability configuration message to the terminal, where the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device. 6. The function configuration method according to claim 5, characterized in that the SDAP service set includes at least one of the following: SDAP service-oriented functions; Basic functions of SDAP; The quality of service QoS guarantee level of the protocol data unit PDU when SDAP transmits data with lower layers. 7. The function configuration method according to claim 6, characterized in that the basic functions of the SDAP include at least one of the following: The data processing method is the default method; When transmitting data with lower layers, the QoS guarantee level of SDAP PDU is the default value; The packet transmission method is the default method. 8. The function configuration method according to claim 6, wherein the lower layer includes a media access control MAC layer, a packet data convergence protocol PDCP layer and/or a radio link control RLC layer. 9. A functional configuration device, characterized by including a processor and a transceiver; The transceiver is configured to report its own capability request message to the network side device. The capability request message carries the service data adaptation protocol SDAP service set required by the terminal; and receives the capability configuration message returned by the network side device. The configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device. 10. A functional configuration device, characterized by including a processor and a transceiver; The transceiver is configured to receive a capability request message reported by a terminal, where the capability request message carries a service data adaptation protocol SDAP service set required by the terminal; The processor is configured to determine a set of SDAP services available to the terminal based on a set of SDAP service capabilities that it can provide; The transceiver is used to send a capability configuration message to the terminal, and the capability configuration message is used to configure a set of SDAP services available to the terminal within the service range of the network side device. 11. A functional configuration device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; characterized in that when the processor executes the program, it implements the claims as claimed in The function configuration method described in any one of 1-8. 12. A computer-readable storage medium with a computer program stored thereon, characterized in that when the program is executed by a processor, the steps in the function configuration method according to any one of claims 1-8 are implemented.