Method and apparatus for acquiring user equipment (UE) capability information

Abstract

The embodiments of the present application relate to the technical field of communications. Provided are a method and apparatus for acquiring user equipment (UE) capability information. The method comprises: receiving a registration request sent by a UE, wherein the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE; on the basis of the node identifier of the second network node, sending a UE capability information acquisition request to the second network node; and receiving the UE capability information of the UE, which is sent by the second network node.

Description

Method and device for acquiring user equipment UE capability information

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202311425807.5, filed on October 30, 2023, entitled “Method and Apparatus for Obtaining User Equipment UE Capability Information,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to the field of communication technologies, and in particular to a method and apparatus for acquiring capability information of a user equipment (UE). Background Art

[0004] In a distributed network, a user equipment (UE) carries its own capability information when registering and stores its capabilities in the access and mobility management function (AMF). When the UE moves to a different distributed network node, it needs to re-report its capability information.

[0005] However, adopting the above approach will increase the signaling overhead of the UE, resulting in higher power consumption of the UE.

[0006] Summary of the Invention

[0007] The embodiments of the present disclosure provide a method for acquiring capability information of a user equipment (UE), which can effectively reduce the power consumption of the UE.

[0008] In a first aspect, an embodiment of the present disclosure provides a method for acquiring capability information of a user equipment (UE), which is applied to a first network node. The method includes:

[0009] receiving a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE;

[0010] Sending a UE capability information acquisition request to the second network node based on the node identifier of the second network node;

[0011] Receive UE capability information of the UE sent by the second network node.

[0012] In a second aspect, an embodiment of the present disclosure provides a method for acquiring capability information of a user equipment (UE), which is applied to a second network node. The method includes:

[0013] receiving a UE capability information acquisition request sent by the first network node;

[0014] sending UE capability information of the UE to the first network node;

[0015] The second network node stores UE capability information of the UE.

[0016] In a third aspect, an embodiment of the present disclosure provides a method for acquiring capability information of a user equipment (UE), which is applied to the UE. The method includes:

[0017] Sending a registration request to the first network node, where the registration request carries a node identifier of the second network node, and the second network node stores UE capability information of the UE;

[0018] The registration request is used by the first network node to obtain UE capability information of the UE from the second network node.

[0019] According to an embodiment of the present disclosure, a method for acquiring capability information of a user equipment (UE) is provided, wherein the method further includes:

[0020] A registration request is sent to the second network node, where the registration request includes UE capability information of the UE.

[0021] According to an embodiment of the present disclosure, a method for acquiring capability information of a user equipment (UE) is provided, wherein the method further includes:

[0022] Sending a capability update request to the first network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0023] According to an embodiment of the present disclosure, a method for acquiring capability information of a user equipment (UE) is provided, wherein the method further includes:

[0024] A capability update request is sent to the second network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0025] According to an embodiment of the present disclosure, a method for acquiring capability information of a user equipment (UE) is provided, wherein the method further includes:

[0026] Sending a deregistration status notification to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete UE capability information of the UE in the second network node.

[0027] In a fourth aspect, an embodiment of the present disclosure further provides a first network node, including a memory, a transceiver, and a processor:

[0028] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0029] receiving a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE;

[0030] Sending a UE capability information acquisition request to the second network node based on the node identifier of the second network node;

[0031] Receive UE capability information of the UE sent by the second network node.

[0032] In a fifth aspect, an embodiment of the present disclosure further provides a second network node, including a memory, a transceiver, and a processor:

[0033] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0034] receiving a UE capability information acquisition request sent by the first network node;

[0035] sending UE capability information of the UE to the first network node;

[0036] The second network node stores UE capability information of the UE.

[0037] In a sixth aspect, an embodiment of the present disclosure further provides a user equipment UE, including a memory, a transceiver, and a processor:

[0038] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0039] Sending a registration request to the first network node, where the registration request carries a node identifier of the second network node, and the second network node stores UE capability information of the UE;

[0040] The registration request is used by the first network node to obtain UE capability information of the UE from the second network node.

[0041] According to a user equipment UE provided by an embodiment of the present disclosure, the processor is further configured to perform the following operations:

[0042] A registration request is sent to the second network node, where the registration request includes UE capability information of the UE.

[0043] According to a user equipment UE provided by an embodiment of the present disclosure, the processor is further configured to perform the following operations:

[0044] Sending a capability update request to the first network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0045] According to a user equipment UE provided by an embodiment of the present disclosure, the processor is further configured to perform the following operations:

[0046] Sending a capability update request to the second network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0047] According to a user equipment UE provided by an embodiment of the present disclosure, the processor is further configured to perform the following operations:

[0048] Sending a deregistration status notification to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete UE capability information of the UE in the second network node.

[0049] In a seventh aspect, an embodiment of the present disclosure further provides a device for acquiring capability information of a user equipment (UE), which is applied to a first network node, and includes:

[0050] A first receiving unit is configured to receive a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE;

[0051] a first sending unit, configured to send a UE capability information acquisition request to the second network node based on the node identifier of the second network node;

[0052] The second receiving unit is configured to receive the UE capability information of the UE sent by the second network node.

[0053] In an eighth aspect, an embodiment of the present disclosure further provides a device for acquiring capability information of a user equipment (UE), which is applied to a second network node, and the device includes:

[0054] A first receiving unit, configured to receive a UE capability information acquisition request sent by a first network node;

[0055] a first sending unit, configured to send UE capability information of the UE to the first network node;

[0056] The second network node stores UE capability information of the UE.

[0057] In a ninth aspect, an embodiment of the present disclosure further provides a device for acquiring capability information of a user equipment (UE), which is applied to the UE, and includes:

[0058] A first sending unit is configured to send a registration request to a first network node, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE;

[0059] The registration request is used by the first network node to obtain UE capability information of the UE from the second network node.

[0060] According to an embodiment of the present disclosure, a device for acquiring capability information of a user equipment (UE) is provided, wherein the device further includes:

[0061] The second sending unit is configured to send a registration request to the second network node, where the registration request includes UE capability information of the UE.

[0062] According to an embodiment of the present disclosure, a device for acquiring capability information of a user equipment (UE) is provided, wherein the device further includes:

[0063] The third sending unit is configured to send a capability update request to the first network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0064] According to an embodiment of the present disclosure, a device for acquiring capability information of a user equipment (UE) is provided, wherein the device further includes:

[0065] The fourth sending unit is configured to send a capability update request to the second network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0066] According to an embodiment of the present disclosure, a device for acquiring capability information of a user equipment (UE) is provided, wherein the device further includes:

[0067] A fifth sending unit is configured to send a deregistration status notification to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete the UE capability information of the UE in the second network node.

[0068] In the tenth aspect, an embodiment of the present disclosure also provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method for obtaining the user equipment UE capability information described in any one of the first aspect above; or, the method for obtaining the user equipment UE capability information described in any one of the second aspect above; or, the method for obtaining the user equipment UE capability information described in any one of the third aspect above.

[0069] In a method and apparatus for acquiring capability information of a user equipment (UE) provided in an embodiment of the present disclosure, when the user equipment (UE) moves to an area of ​​a first network node, the user equipment (UE) sends a node identifier of a second network node storing the UE capability information of the UE to the first network node. In this way, the first network node can directly send a UE capability information acquisition request to the second network node based on the node identifier of the second network node. After receiving the UE capability information acquisition request sent by the first network node, the second network node sends the UE capability information of the UE to the first network node. This eliminates the need for the UE to re-report its UE capability information to the first network node, thereby reducing the signaling overhead of the UE and the power consumption of the UE. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0071] FIG1 is a flow chart of a method for acquiring capability information of a user equipment (UE) according to an embodiment of the present disclosure;

[0072] FIG2 is a second flow chart of a method for acquiring capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0073] FIG3 is a third flow chart of a method for acquiring capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0074] FIG4 is a flow chart of a method for reporting capability information of a user equipment UE according to an embodiment of the present disclosure;

[0075] FIG5 is a flow chart of a method for updating capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0076] FIG6 is a flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0077] FIG7 is a second flow chart of a method for reporting capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0078] FIG8 is a second flow chart of a method for updating capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0079] FIG9 is a schematic diagram of a network topology according to an embodiment of the present disclosure;

[0080] FIG10 is a third flow chart of a method for updating capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0081] FIG11 is a second schematic diagram of the structure of the network topology provided in an embodiment of the present disclosure;

[0082] FIG12 is a second flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0083] FIG13 is a third flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0084] FIG14 is a third flow chart of a method for reporting capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0085] FIG15 is a fourth flow chart of a method for updating capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0086] FIG16 is a schematic diagram of a flow chart of a method for subscribing to capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0087] FIG17 is a fourth flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0088] FIG18 is a fifth flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0089] FIG19 is a flow chart of a method for reporting or updating capability information of a user equipment UE according to an embodiment of the present disclosure;

[0090] FIG20 is a schematic structural diagram of a first network node provided by an embodiment of the present disclosure;

[0091] FIG21 is a schematic structural diagram of a second network node provided in an embodiment of the present disclosure;

[0092] FIG22 is a schematic structural diagram of a user equipment UE provided in an embodiment of the present disclosure;

[0093] FIG23 is a structural diagram of a device for acquiring capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0094] FIG24 is a second structural diagram of an apparatus for acquiring capability information of a user equipment UE provided in an embodiment of the present disclosure;

[0095] FIG25 is a third structural diagram of the device for obtaining capability information of user equipment UE provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0096] In the embodiments of the present disclosure, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0097] In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.

[0098] The terminal involved in the embodiments of the present disclosure may refer to a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem. In different systems, the name of the terminal may also be different. For example, in a 5G system, the terminal may be called User Equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it can be a portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile device that exchanges voice and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, or a user device, but is not limited in the embodiments of the present disclosure.

[0099] The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface, or may be called another name. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present disclosure may be a base transceiver station (BTS) in the Global System for Mobile communications (GSM) or code division multiple access (CDMA), a network device (NodeB) in wide-band code division multiple access (WCDMA), an evolutionary Node B (eNB or e-NodeB) in the long term evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), a home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of the present disclosure. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0100] For example, in an embodiment of the present disclosure, a network device and a terminal device may each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission may be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoded transmission, or beamforming transmission.

[0101] In order to facilitate a clearer understanding of the various embodiments of the present disclosure, some relevant knowledge is introduced below.

[0102] The core concept of 6G (6th Generation) mobile communication technology networking design is the Distributed Autonomous Network (DAN), which transforms network architecture from a centralized approach to a centralized and distributed collaborative approach. The core concept of DAN is the on-demand expansion of homogeneous distributed nodes to meet the wide-area, multi-scenario, and on-demand access requirements of 6G. The distributed Small Cloud Unit (SCU) is the most critical module in the DAN architecture. It is distributed, autonomous, and self-contained, with a consistent organizational framework that allows for on-demand customization, on-demand setup, and rapid networking.

[0103] User Equipment (UE) capabilities are divided into network capabilities and wireless capabilities.

[0104] UE network capabilities include supported encryption algorithms (EEA) and integrity algorithms (EIA), support for Cellular Internet of Things (CIoT), Proximity Service (ProSe) (device to device (D2D)), Dual Connectivity E-UTRAN (Evolved UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access Network) and NR (New Radio), DCNR) and vehicle to everything (V2X) wireless communication technology, as well as new capabilities added in 6G, such as artificial intelligence (AI), data capabilities, computing capabilities, telepathy capabilities, security capabilities, orchestration capabilities, monitoring capabilities and configuration capabilities.

[0105] The UE radio capability information contains information about the Radio Access Technology (RAT) supported by the UE (e.g. power class, frequency band, etc.). Therefore, this information may be large enough that it is not desirable to send it over the radio interface at every transition from CM-IDLE to CM-COONECTED of the UE's Connection Manager (CM) state in the Access and Mobility management Function (AMF). To avoid this radio overhead, the AMF shall store the UE radio capability information during the UE's CM IDLE state and the UE's RM-REGISTERED state, and the AMF shall (if available) send its latest UE radio capability information to the RAN in an N2 request message, i.e., Initial Context Setup Request or UE Radio Capability Check Request.

[0106] The AMF deletes the UE radio capabilities when the UE Resource Manager (RM) state in the AMF transitions to RM-DEREGISTERED. The AMF deletes the UE radio capabilities when it receives a Registration Request with the Registration Type set to Initial Registration, or when it receives the first Registration Request with the Registration Type set to Mobility Registration Update after Evolved-UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access (E-UTRA) / Evolved Packet Core Attach (EPC Attach). The UE radio capabilities are maintained in the core network even during AMF reselection.

[0107] If the UE's NG-RAN UE radio capabilities information changes while in the CM-IDLE state, the UE shall perform a Registration procedure with the Registration Type set to Mobile Registration Update indicating "UE Radio Capabilities Update". When the AMF receives a Registration Update Request with "UE Radio Capabilities Update", it shall delete any UE radio capabilities information it has stored for the UE. If a trigger to change the UE's NG-RAN UE radio capabilities information occurs while the UE is in the CM-CONNECTED state, the UE shall first enter the CM-IDLE state and then perform a Registration procedure with the Registration Type set to Mobile Registration Update indicating "UE Radio Capabilities Update".

[0108] In order to solve the problems of large UE signaling overhead and high UE power consumption in the prior art, so as to reduce the power consumption of UE, the embodiment of the present disclosure provides a method for obtaining user equipment UE capability information. The UE carries UE capabilities (including wireless capabilities and network capabilities, wherein wireless capabilities include power level, frequency band, etc., and network capabilities include AI capabilities, data capabilities, computing capabilities, synaesthesia capabilities, security capabilities, orchestration capabilities, monitoring capabilities, configuration capabilities, etc.) during initial registration. The UE capabilities can be stored and managed by the AMF in a centralized node or a distributed node, or the UE reports its capability information to a newly added network element CSMF in the distributed network for storage and management. The CSMF can be deployed in a distributed node or in a centralized node, and the specific deployment location is not limited. When the UE accesses a new distributed node, the AMF in the new distributed node can obtain and subscribe to the UE capabilities from the network element that stores the UE capabilities, and does not need to be stored locally, thereby reducing the burden of storage and management of the AMF in some distributed nodes. At the same time, after the UE accesses a new distributed node, it does not need to retransmit the UE capabilities to the AMF in the new distributed node through the RAN, which saves air interface resources, reduces the UE's signaling overhead, and thus reduces the UE's power consumption.

[0109] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0110] FIG1 is a flow chart of a method for obtaining UE capability information according to an embodiment of the present disclosure. The method for obtaining UE capability information can be applied to a first network node where the UE is currently located. For example, referring to FIG1 , the method for obtaining UE capability information may include:

[0111] Step 101: Receive a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE.

[0112] For example, the first network node is the network node where the UE is currently located. The first network node may be an AMF in a centralized node or an AMF in a distributed node in a distributed network. The second network node may be an AMF in a centralized node or an AMF in a distributed node in a distributed network, or a CSMF in a centralized node, or a CSMF in a distributed node, or a CSMF in another network node. The second network node stores the UE capability information of the UE.

[0113] When the UE moves to the area of ​​the first network node, the UE will send a registration request to the first network node. At the same time, when sending the registration request, the UE carries the node identifier of the second network node storing the UE capability information of the UE.

[0114] Step 102: Send a UE capability information acquisition request to the second network node based on the node identifier of the second network node.

[0115] Specifically, after receiving the registration request sent by the UE, the first network node may send a UE capability information acquisition request to the second network node according to the node identifier of the second network node carried in the registration request, so as to acquire the UE capability information of the UE.

[0116] Step 103: Receive UE capability information of the UE sent by the second network node.

[0117] Specifically, after receiving the UE capability information acquisition request sent by the first network node, the second network node determines the UE capability information of the UE required by the first network node according to the UE capability information acquisition request, and sends the UE capability information to the first network node.

[0118] The UE may exchange information with the first network node or the second network node through the radio access network RAN.

[0119] In a method for acquiring capability information of a user equipment (UE) provided in an embodiment of the present disclosure, when the user equipment (UE) moves to an area of ​​a first network node, the user equipment (UE) sends a node identifier of a second network node storing the UE capability information of the UE to the first network node. In this way, the first network node can directly send a UE capability information acquisition request to the second network node based on the node identifier of the second network node. After receiving the UE capability information acquisition request sent by the first network node, the second network node sends the UE capability information of the UE to the first network node. This eliminates the need for the UE to re-report its UE capability information to the first network node, thereby reducing the signaling overhead of the UE and the power consumption of the UE.

[0120] Based on the embodiment shown in FIG. 1 above, for example, in an embodiment of the present disclosure, the method for obtaining capability information of a user equipment UE further includes: a first network node receives a capability update request sent by the UE, where the capability update request carries an identifier of the UE and updated UE capability information; after receiving the capability update request, the first network node sends the updated UE capability information carried in the capability update request to a second network node, and instructs the second network node to update the UE capability information corresponding to the identifier of the UE, so that the second network node can update its stored UE capability information in a timely manner, thereby effectively ensuring the accuracy of the stored UE capability information.

[0121] For example, when the UE has moved to the first network node, and when the first network node is the AMF of a distributed node of a distributed network, and the second network node storing the UE capability information is the AMF of a centralized node of a distributed network; or, when the first network node is the AMF of a distributed node 1 of a distributed network, and the second network node storing the UE capability information is the AMF of a distributed node 2 of a distributed network; or, when the first network node is the AMF of a centralized node of a distributed network, and the second network node storing the UE capability information is the AMF of a distributed node of a distributed network, the UE needs to instruct the second network node through the first network node to update the stored UE capability information of the UE, so that the stored UE capability information can be updated in a timely manner, thereby effectively ensuring the accuracy of the stored UE capability information.

[0122] Therefore, after the UE capability information of the UE is updated, the first network node receives a capability update request sent by the UE, where the capability update request carries the UE identifier and the updated UE capability information of the UE. After receiving the capability update request, the first network node sends the updated UE capability information carried in the capability update request to the second network node that stores the UE capability information, and instructs the second network node to update the UE capability information corresponding to the UE identifier based on the UE identifier.

[0123] The method for acquiring UE capability information provided by the embodiments of the present disclosure is such that, when the UE capability of the UE is updated, the UE can send the updated UE capability information to the second network node storing the UE capability information through the first network node where the UE is currently located, and instruct the second network node to update the UE capability information corresponding to the UE identifier, thereby timely updating the UE capability information stored in the second network node. In this way, the second network node can update the stored UE capability information in a timely manner, thereby effectively ensuring the accuracy of the stored UE capability information.

[0124] Based on the embodiment shown in FIG1 above, for example, in an embodiment of the present disclosure, the method for obtaining UE capability information further includes: the first network node sends a capability deletion message to the second network node, where the capability deletion message is used to instruct the second network node to delete the UE capability information of the UE.

[0125] Specifically, when a UE exits a distributed network, the distributed network no longer needs to provide services to the UE. Therefore, upon determining that the UE has exited the distributed network, the first network node may send a capability deletion message to a second network node storing the UE's UE capability information. The capability deletion message is used to instruct the second network node to delete the UE capability information of the UE that has exited the distributed network. In this way, the second network node can promptly delete the stored UE capability information, thereby freeing up storage resources used to store the UE capability information, thereby improving storage resource utilization.

[0126] It is understandable that the UE exits the distributed network in the following two situations: one is that the UE exits the distributed network normally, and the other is that the UE exits the distributed network abnormally due to an abnormality.

[0127] In the method for acquiring UE capability information provided by the embodiment of the present disclosure, after the UE exits the distributed network, the first network node where the UE is currently located sends a capability deletion message to the second network node that stores the UE capability information of the UE, so as to promptly delete the UE capability information stored in the second network node and release the storage resources of the second network node in a timely manner.

[0128] Based on the embodiment shown in FIG. 1 above, by way of example, in an embodiment of the present disclosure, the method for acquiring capability information of a user equipment UE further includes: a process in which the first network node sends a capability deletion message to the second network node specifically includes: the first network node receives a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network; and the first network node sends a capability deletion message to the second network node based on the registration status notification.

[0129] Specifically, when the UE exits the distributed network normally, the UE will send a deregistration status notification to the first network node, where the deregistration status notification is used to instruct the UE to exit the distributed network. When the first network node determines that the UE has exited the distributed network based on the deregistration status notification, the first network node may send a capability deletion message to the second network node that stores the UE capability information of the UE, where the capability deletion message is used to instruct the second network node to delete the UE capability information of the UE that has exited the distributed network.

[0130] In the method for acquiring UE capability information provided by the embodiment of the present disclosure, after the UE exits the distributed network, the first network node sends a capability deletion message to the second network node that stores the UE capability information of the UE, so as to promptly delete the UE capability information stored in the second network node and release the storage resources of the second network node in a timely manner.

[0131] Based on the embodiment shown in FIG. 1 , for example, in an embodiment of the present disclosure, the method for acquiring capability information of a user equipment UE further includes:

[0132] Based on the node identifier of the second network node, subscription information for UE capability information is sent to the second network node.

[0133] Specifically, after receiving the registration request sent by the UE, the first network node may also send subscription information of the UE capability information to the second network node according to the node identifier of the second network node carried in the registration request. The subscription information of the UE capability information is used to subscribe to the UE capability information of the UE from the second network node. Based on the subscription of the first network node, if the UE capability information of the UE in the second network node changes, the second network node will notify the first network node of the change.

[0134] In the method for acquiring UE capability information provided by the embodiment of the present disclosure, a first network node can subscribe to the UE capability information of the UE by sending subscription information of the UE capability information to a second network node, so as to be informed in a timely manner when the UE capability information of the UE changes.

[0135] FIG2 is a second flow diagram of a method for obtaining UE capability information according to an embodiment of the present disclosure. The method for obtaining UE capability information can be applied to a second network node that stores the UE capability information. For example, referring to FIG2 , the method for obtaining UE capability information may include:

[0136] Step 201: Receive a UE capability information acquisition request sent by a first network node.

[0137] For example, the first network node is the network node where the UE is currently located. The first network node may be an AMF in a centralized node or an AMF in a distributed node in a distributed network. The second network node may be an AMF in a centralized node or an AMF in a distributed node in a distributed network, or a CSMF in a centralized node, or a CSMF in a distributed node, or a CSMF in another network node. The first network node is the network node where the UE is currently located, and the second network node stores the UE capability information of the UE.

[0138] The second network node receives a UE capability information acquisition request sent by the first network node, where the UE capability information acquisition request is used by the first network node to acquire, from the second network node, UE capability information of the UE stored in the second network node.

[0139] The UE may exchange information with the first network node or the second network node through the radio access network RAN.

[0140] Step 202: Send UE capability information of the UE to the first network node; wherein the UE capability information of the UE is stored in the second network node.

[0141] Specifically, after receiving the UE capability information acquisition request sent by the first network node, the second network node determines the UE capability information required by the first network node according to the UE capability information acquisition request, and sends the UE capability information to the first network node.

[0142] In a method for acquiring capability information of a user equipment (UE) provided in an embodiment of the present disclosure, when the user equipment (UE) moves to an area of ​​a first network node, the user equipment (UE) sends a node identifier of a second network node storing the UE capability information of the UE to the first network node. In this way, the first network node can directly send a UE capability information acquisition request to the second network node based on the node identifier of the second network node. After receiving the UE capability information acquisition request sent by the first network node, the second network node sends the UE capability information of the UE to the first network node. This eliminates the need for the UE to re-report its UE capability information to the first network node, thereby reducing the signaling overhead of the UE and the power consumption of the UE.

[0143] Based on the embodiment shown in FIG. 2 above, for example, in an embodiment of the present disclosure, the method for obtaining user equipment UE capability information further includes: the second network node receives a registration request sent by the UE, the registration request including the UE capability information of the UE; and the second network node stores the UE capability information of the UE.

[0144] Specifically, when the UE initially registers in the distributed network, it sends a registration request to the second network node, where the registration request includes the UE capability information of the UE. After receiving the registration request, the second network node stores the UE capability information of the UE carried in the registration request.

[0145] In a method for obtaining UE capability information provided by an embodiment of the present disclosure, a UE sends UE capability information to the second network node when registering with the second network node, so that the second network node stores the UE capability information of the UE. Subsequently, after the UE moves, the network node where the UE is located can directly obtain the UE capability information from the second network node without the need for the UE to report its capabilities, thereby reducing the signaling overhead of the UE and the power consumption of the UE.

[0146] Based on the embodiment shown in FIG. 2 above, for example, in an embodiment of the present disclosure, the method for obtaining user equipment UE capability information further includes: the second network node receives updated UE capability information of the UE sent by the first network node; and the second network node updates the UE capability information of the UE based on the updated UE capability information.

[0147] Specifically, when the UE capability information of the UE is updated, the UE capability information of the UE stored in the second network node needs to be updated simultaneously, so that the second network node can store the latest UE capability information.

[0148] For example, when the UE has moved to the first network node, and when the first network node is the AMF of a distributed node of a distributed network, and the second network node storing the UE capability information is the AMF of a centralized node of a distributed network; or, when the first network node is the AMF of a distributed node 1 of a distributed network, and the second network node storing the UE capability information is the AMF of a distributed node 2 of a distributed network; or, when the first network node is the AMF of a centralized node of a distributed network, and the second network node storing the UE capability information is the AMF of a distributed node of a distributed network, the UE needs to instruct the second network node through the first network node to update the stored UE capability information of the UE.

[0149] Therefore, after the UE capability information of the UE is updated, the UE will send a capability update request to the first network node. The capability update request carries the identifier of the UE and the updated UE capability information of the UE. After receiving the capability update request, the first network node will send the updated UE capability information carried in the capability update request to the second network node that stores the UE capability information. After receiving the updated UE capability information, the second network node will update the UE capability information of the UE.

[0150] The method for acquiring UE capability information provided by the embodiment of the present disclosure enables the second network node to promptly update the UE capability information stored in the second network node by receiving the updated UE capability information sent by the first network node. In this way, the second network node can promptly update the stored UE capability information, thereby effectively ensuring the accuracy of the stored UE capability information.

[0151] Based on the embodiment shown in FIG. 2 above, for example, in an embodiment of the present disclosure, the method for obtaining capability information of a user equipment UE further includes: a second network node receiving a capability update request sent by the UE, the capability update request carrying an identifier of the UE and updated UE capability information; and the second network node updating the UE capability information of the UE based on the identifier of the UE.

[0152] For example, the first network node and the second network node may be AMFs under the same distributed node or centralized node in a distributed network. At this time, after the UE capability information of the UE is updated, the UE may send a capability update request directly to the second network node through the wireless access network instead of through the first network node.

[0153] The capability update request may include the UE identifier and updated UE capability information. The second network node may update the stored UE capability information corresponding to the UE identifier based on the UE identifier and the updated UE capability information.

[0154] The method for obtaining UE capability information provided by the embodiment of the present disclosure enables the second network node to promptly update the UE capability information stored in the second network node by receiving a capability update request sent by the UE. In this way, the second network node can promptly update the stored UE capability information, thereby effectively ensuring the accuracy of the stored UE capability information.

[0155] Based on the embodiment shown in FIG. 2 above, for example, in an embodiment of the present disclosure, the method for obtaining user equipment UE capability information further includes: the second network node receives a capability deletion message sent by the first network node; and the second network node deletes the UE capability information of the UE based on the capability deletion message.

[0156] Specifically, when the UE normally exits the distributed network, the UE sends a deregistration status notification to the first network node, where the deregistration status notification is used to instruct the UE to exit the distributed network. Upon determining, based on the deregistration status notification, that the UE has exited the distributed network, the first network node sends a capability deletion message to a second network node that stores the UE capability information of the UE. Upon receiving the capability deletion message sent by the first network node, the second network node deletes the stored UE capability information of the UE based on the capability deletion message.

[0157] According to the method for obtaining UE capability information provided by the embodiment of the present disclosure, after the UE exits the distributed network, the second network node promptly deletes the stored UE capability information according to the capability deletion message sent by the first network node, thereby releasing the storage resources of the second network node in a timely manner.

[0158] Based on the embodiment shown in FIG. 2 above, for example, in an embodiment of the present disclosure, the method for obtaining capability information of a user equipment UE further includes: a second network node receiving a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network; and the second network node deleting the UE capability information of the UE based on the deregistration status notification.

[0159] Specifically, the first network node and the second network node can be the AMF under the same distributed node or centralized node in the distributed network. At this time, when the UE normally exits the distributed network, the UE can send a deregistration status notification directly to the first network node through the wireless access network. The deregistration status notification is used to instruct the UE to exit the distributed network.

[0160] After receiving the deregistration status notification, the second network node deletes the UE capability information of the UE that has exited the distributed network based on the deregistration status notification.

[0161] According to the method for acquiring UE capability information provided by the embodiment of the present disclosure, after the UE exits the distributed network, the second network node deletes the UE capability information stored in the second network node according to the deregistration status notification sent by the UE, thereby releasing the storage resources of the second network node in a timely manner.

[0162] Based on the embodiment shown in FIG. 2 , for example, in an embodiment of the present disclosure, the method for acquiring UE capability information further includes: the second network node receiving subscription information of the UE capability information sent by the first network node.

[0163] Specifically, after the second network node receives the subscription information of the UE capability information sent by the first network node, if the UE capability information of the UE changes, the second network node will notify the first network node of the change.

[0164] In the method for acquiring UE capability information provided by the embodiment of the present disclosure, a first network node can subscribe to the UE capability information of the UE by sending subscription information of the UE capability information to a second network node, so as to be informed in a timely manner when the UE capability information of the UE changes.

[0165] FIG3 is a flow chart of a third method for obtaining UE capability information provided by an embodiment of the present disclosure. The method for obtaining UE capability information can be applied to a UE. For example, referring to FIG3 , the method for obtaining UE capability information can include:

[0166] Step 301: Send a registration request to a first network node, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE. The registration request is used by the first network node to obtain the UE capability information of the UE from the second network node.

[0167] In a method for acquiring capability information of a user equipment (UE) provided in an embodiment of the present disclosure, when the user equipment (UE) moves to an area of ​​a first network node, the user equipment (UE) sends a node identifier of a second network node storing the UE capability information of the UE to the first network node. In this way, the first network node can directly send a UE capability information acquisition request to the second network node based on the node identifier of the second network node. After receiving the UE capability information acquisition request sent by the first network node, the second network node sends the UE capability information of the UE to the first network node. This eliminates the need for the UE to re-report its UE capability information to the first network node, thereby reducing the signaling overhead of the UE and the power consumption of the UE.

[0168] Based on the embodiment shown in FIG. 3 , for example, in an embodiment of the present disclosure, the method for acquiring UE capability information further includes: the UE sending a registration request to the second network node, where the registration request includes the UE capability information of the UE.

[0169] Based on the embodiment shown in Figure 3 above, for example, in an embodiment of the present disclosure, the method for obtaining user equipment UE capability information also includes: the UE sends a capability update request to the first network node, the capability update request carries the UE identifier and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0170] Based on the embodiment shown in Figure 3 above, for example, in an embodiment of the present disclosure, the method for obtaining user equipment UE capability information also includes: the UE sends a capability update request to the second network node, the capability update request carries the UE identifier and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0171] Based on the embodiment shown in FIG. 3 above, for example, in an embodiment of the present disclosure, the method for obtaining capability information of a user equipment UE further includes: the UE sends a deregistration status notification to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete the UE capability information of the UE in the second network node.

[0172] To facilitate understanding of the data transmission method provided by the embodiment of the present disclosure, the data transmission method provided by the embodiment of the present disclosure will be described in detail below through specific examples.

[0173] Embodiment 1: The AMF in the centralized node is responsible for the storage and management of UE capability information.

[0174] Example 1.1: UE capability information reporting

[0175] FIG4 is a flow chart of one of the methods for reporting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG4 , taking the first network node where the UE is currently located as AMF2 in a distributed node and the second network node storing the UE capability information of the UE as AMF1 in a centralized node as an example, the method for reporting capability information of the user equipment UE includes the following steps:

[0176] Step 401: The UE selects AMF1 in the centralized node during the initial registration, and sends a registration request to the AMF1 in the centralized node through the radio access network RAN. The registration request carries the UE identifier and UE capability information, such as the registration type, the user concealed identifier (SUCI), the requested network slice selection assistance information (NSSAI), and the UE capabilities and other related information.

[0177] Step 402: AMF1 in the centralized node updates the UE context and stores the UE capability information of the UE carried in the registration request in a local UE capability information list, which stores the mapping relationship between the UE identifier and the UE capability information.

[0178] Note: The authentication process during registration and the related operations such as subscribing to UE subscription data from Unified Data Management (UDM) are omitted here.

[0179] Step 403: AMF1 in the centralized node replies a registration response to the UE via the RAN.

[0180] Step 404: After the UE accesses the AMF2 in the distributed node, the UE sends a registration request to the AMF2 in the distributed node through the RAN. The registration request carries the identifier of the AMF1.

[0181] Step 405: AMF2 in the distributed node sends a UE capability information acquisition request to AMF1 in the centralized node based on the identifier of AMF1.

[0182] Step 406: AMF1 in the centralized node sends the UE capability information of the UE to AMF2 in the distributed node based on the UE capability information acquisition request.

[0183] In this way, when the user equipment UE moves to the AMF2 in the distributed node, the AMF2 in the distributed node can obtain the UE capability information from the AMF1 in the centralized node that stores the UE capability information. The UE does not need to re-report its own UE capability information, which reduces the UE's signaling overhead and the UE's power consumption.

[0184] Example 1.2: UE capability information update

[0185] FIG5 is a flow chart of one of the methods for updating the capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG5 , taking the first network node where the UE is currently located as the centralized node AMF1 and the second network node storing the UE capability information of the UE as the centralized node AMF1 as an example, the method for updating the capability information of the user equipment UE includes the following steps:

[0186] Step 501: When a UE's capabilities change, the UE sends a capability update request to the AMF1 in the centralized node via the RAN. This capability update request carries the UE's identity and updated UE capability information. If the UE is in the CM-CONNECTED state, it must first return to the CM-IDLE state and then perform the registration update process to update the UE capability information.

[0187] Step 502: Based on the updated UE capability information, the AMF1 in the centralized node updates the UE capability information of the UE in the locally stored UE capability information list.

[0188] Step 503: The AMF1 in the centralized node returns a capability update response to the UE via the RAN.

[0189] In this way, the AMF1 in the centralized node can update the stored UE capability information in a timely manner, thereby effectively ensuring the accuracy of the stored UE capability information.

[0190] Example 1.3: Deleting UE capability information

[0191] FIG6 is a flow chart of one of the methods for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG6 , taking the first network node where the UE is currently located as AMF2 in a distributed node and the second network node storing the UE capability information of the UE as AMF1 in a centralized node as an example, the method for deleting capability information of the user equipment UE includes the following steps:

[0192] Step 601: The UE sends a deregistration status notification to the AMF2 in the distributed node through the RAN.

[0193] Step 602: Based on the deregistration status notification, the AMF2 in the distributed node sends a capability deletion message to the AMF1 in the centralized node.

[0194] Step 603: The AMF1 in the centralized node deletes the locally stored UE capability information of the UE based on the capability deletion message.

[0195] Step 604: AMF2 in the distributed node returns a deregistration response to the UE.

[0196] In this way, after the UE exits the distributed network, according to the capability deletion message sent by the AMF2 in the distributed node, the AMF1 in the centralized node will promptly delete the stored UE capability information and release the storage resources of the AMF1 in the centralized node in a timely manner.

[0197] Embodiment 2: The AMF in a distributed node is responsible for the storage and management of UE capability information.

[0198] Example 2.1: UE capability information reporting

[0199] FIG7 is a second flow chart of a method for reporting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG7 , taking the first network node where the UE is currently located as AMF2 in distributed node 2, the second network node storing the UE capability information of the UE as AMF1 in distributed node 1, and distributed node 1 and distributed node 2 being adjacent as an example, the method for reporting capability information of the user equipment UE includes the following steps:

[0200] Step 701: The UE selects AMF1 in distributed node 1 during initial registration and sends a registration request to AMF1 in distributed node 1 through the radio access network RAN. The registration request carries the UE identifier and UE capability information, such as registration type, SUCI, NSSAI, and UE capabilities.

[0201] Step 702: AMF1 in distributed node 1 updates the UE context and stores the UE capability information of the UE carried in the registration request in a local UE capability information list, which stores the mapping relationship between the UE identifier and the UE capability information.

[0202] Note: The authentication process during registration and the related operations such as subscribing to UE contract data from UDM are omitted here.

[0203] Step 703: AMF1 in distributed node 1 replies a registration response to the UE through the RAN.

[0204] Step 704: When the UE accesses the AMF2 in the distributed node 2, the UE sends a registration request to the AMF2 in the distributed node 2 through the RAN. The registration request carries the identifier of the AMF1.

[0205] Step 705: AMF2 in distributed node 2 sends a UE capability information acquisition request to AMF1 in distributed node 1 based on the identifier of AMF1.

[0206] Step 706: Based on the UE capability information acquisition request, AMF1 in distributed node 1 sends the UE capability information to AMF2 in distributed node 2.

[0207] In this way, when the user equipment UE moves to the AMF2 in the distributed node 2, the AMF2 in the distributed node 2 can obtain the UE capability information from the AMF1 in the distributed node 1 that stores the UE capability information. There is no need for the UE to re-report its own UE capability information, which reduces the UE's signaling overhead and the UE's power consumption.

[0208] Example 2.21: UE capability information update

[0209] FIG8 is a second flow chart of a method for updating UE capability information provided by an embodiment of the present disclosure, and FIG9 is a first structural diagram of a network topology provided by an embodiment of the present disclosure. As shown in FIG8 and FIG9 , taking the case where the first network node where the UE is currently located is AMF1 in distributed node 1, the second network node storing the UE capability information is AMF1 in distributed node 1, and the network topology is fully connected as an example, the method for updating UE capability information of the user equipment includes the following steps:

[0210] Step 801: When a UE's capabilities change, the UE sends a capability update request to AMF1 in distributed node 1 via the RAN. This capability update request carries the UE's identifier and updated UE capability information. If the UE is in the CM-CONNECTED state, it must first return to the CM-IDLE state and then perform the registration update procedure to update the capability information.

[0211] Step 802: Based on the updated UE capability information, the AMF1 in the distributed node 1 updates the UE capability information of the UE in the locally stored UE capability information list.

[0212] Step 803: AMF1 in distributed node 1 returns a capability update response to the UE through the RAN.

[0213] In this way, the AMF1 in the distributed node 1 can update the stored UE capability information in a timely manner, thereby effectively ensuring the accuracy of the stored UE capability information.

[0214] Example 2.22: UE capability information update

[0215] Figure 10 is a third flow diagram of a method for updating UE capability information provided by an embodiment of the present disclosure, and Figure 11 is a second structural diagram of a network topology provided by an embodiment of the present disclosure. As shown in Figures 10 and 11, taking the case where the first network node where the UE is currently located is AMF3 in distributed node 3, the second network node storing the UE capability information is AMF1 in distributed node 1, and distributed node 3 is not adjacent to distributed node 1, and distributed node 1 and distributed node 3 are respectively adjacent to distributed node 2, the method for updating UE capability information of the user equipment includes the following steps:

[0216] Step 1001: When a UE's capabilities change, the UE sends a capability update request to AMF3 in distributed node 3 via the RAN. This capability update request carries the UE's identifier and updated UE capability information. If the UE is in the CM-CONNECTED state, it must first return to the CM-IDLE state and then perform the registration update procedure to update the capability information.

[0217] Step 1002: AMF3 in distributed node 3 forwards the updated UE capability information to AMF2 in distributed node 2.

[0218] Step 1003: AMF2 in distributed node 2 forwards the updated UE capability information to AMF1 in distributed node 1.

[0219] Step 1004: Based on the updated UE capability information, the AMF1 in the distributed node 1 updates the UE capability information of the UE in the locally stored UE capability information list.

[0220] Step 1005: AMF1 in distributed node 1 returns a capability update response to AMF2 in distributed node 2.

[0221] Step 1006: AMF2 in distributed node 2 returns a capability update response to AMF3 in distributed node 3.

[0222] Step 1007: AMF3 in distributed node 3 returns a capability update response to the UE through the RAN.

[0223] In this way, the AMF1 in the distributed node 1 can update the stored UE capability information in a timely manner, thereby effectively ensuring the accuracy of the stored UE capability information.

[0224] Example 2.31: Deletion of UE capability information

[0225] FIG12 is a second flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG12 , taking the first network node where the UE is currently located as the AMF1 in the distributed node 1, the second network node storing the UE capability information of the UE as the AMF1 in the distributed node 1, and the network topology being fully connected as an example, the method for deleting capability information of the user equipment UE includes the following steps:

[0226] Step 1201: The UE sends a deregistration status notification to the AMF1 in the distributed node 1 through the RAN.

[0227] Step 1202: AMF1 in distributed node 1 deletes the locally stored UE capability information of the UE based on the deregistration status notification.

[0228] Step 1203: AMF1 in distributed node 1 returns a deregistration response to the UE.

[0229] In this way, after the UE exits the distributed network, the AMF1 in the distributed node 1 will delete the stored UE capability information in a timely manner according to the deregistration status notification sent by the user equipment UE, and release the storage resources of the AMF1 in the distributed node 1 in a timely manner.

[0230] Example 2.32: Deletion of UE capability information

[0231] FIG13 is a third flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG13 , taking the case where the first network node where the UE is currently located is AMF3 in distributed node 3, the second network node storing the UE capability information of the UE is AMF1 in distributed node 1, and distributed node 3 is not adjacent to distributed node 1, and distributed node 1 and distributed node 3 are respectively adjacent to distributed node 2 as an example, the method for deleting capability information of the user equipment UE includes the following steps:

[0232] Step 1301: The UE sends a deregistration status notification to the AMF3 in the distributed node 3 through the RAN.

[0233] Step 1302: Based on the deregistration status notification, AMF3 in distributed node 3 sends a capability deletion message to AMF2 in distributed node 2.

[0234] Step 1303: AMF2 in distributed node 2 forwards the capability deletion message to AMF1 in distributed node 1.

[0235] Step 1304: AMF1 in distributed node 1 deletes the locally stored UE capability information of the UE based on the capability deletion message.

[0236] Step 1305: AMF3 in distributed node 3 returns a deregistration response to the UE through the RAN.

[0237] In this way, after the UE exits the distributed network, according to the capability deletion message sent by AMF3 in distributed node 3, AMF1 in distributed node 1 will promptly delete the stored UE capability information and release the storage resources of AMF1 in distributed node 1 in a timely manner.

[0238] Example 3: A distributed network adds a CSMF (Capability Storage and Management Functions) network element to store and manage UEs. The CSMF can be deployed in a distributed node or a centralized node, and the specific deployment location is not limited.

[0239] Example 3.11: UE capability information reporting

[0240] FIG14 is a third flow chart of a method for reporting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG14 , the method for reporting capability information of the user equipment UE includes the following steps:

[0241] Step 1401: The UE sends a registration request to the CSMF through the RAN. The registration request carries relevant information such as the UE capability information and the UE identifier.

[0242] Step 1402: The CSMF locally caches the mapping relationship between the UE identifier and the UE capability information of the UE.

[0243] Step 1403: The CSMF returns a registration response to the UE through the RAN, and the registration response carries the CSMF identifier.

[0244] In this way, when the user equipment UE moves to a certain network node, the network node can obtain the UE capability information from the CSMF, without the UE having to re-report its own UE capability information, thereby reducing the UE's signaling overhead and the UE's power consumption.

[0245] Example 3.2: UE capability information update

[0246] FIG15 is a fourth flow chart of a method for updating capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG15 , the method for updating capability information of the user equipment UE includes the following steps:

[0247] Step 1501: When the UE capability changes, the UE sends a capability update request to the CSMF via the RAN. The capability update request carries the UE identifier and updated UE capability information.

[0248] Step 1502: The CSMF updates the locally stored UE capability information of the UE.

[0249] Step 1503: The CSMF returns a capability update response to the UE via the RAN.

[0250] In this way, the CSMF can timely update its stored UE capability information according to the capability update request sent by the UE, thereby effectively ensuring the accuracy of its stored UE capability information.

[0251] Example 3.3: UE capability information subscription

[0252] FIG16 is a flow chart of a method for subscribing to capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG16 , the method for subscribing to capability information of a user equipment UE includes the following steps:

[0253] Step 1601: The UE sends a registration request to the AMF in the distributed network through the RAN, and carries relevant information such as the registration type, SUCI, requested NSSAI and CSMF identifier in the registration request message.

[0254] Step 1602: The AMF updates the UE context and sends a UE capability information acquisition request to the CSMF according to the CSMF identifier carried in the registration request. The UE capability information acquisition request carries relevant information such as the UE identifier.

[0255] Note: The authentication process during registration and the related operations such as subscribing to UE contract data from UDM are omitted here.

[0256] Step 1603: Based on the UE capability information acquisition request, the CSMF sends the UE capability information to the AMF.

[0257] Step 1604: AMF sends a UE capability information subscription request to CSMF. When the UE capability information of the UE in CSMF changes, CSMF will notify AMF.

[0258] Step 1605: The AMF returns a registration response to the UE.

[0259] In this way, based on the UE capability information subscription request of AMF, when the UE capability information of the UE in CSMF changes, CSMF will promptly notify AMF.

[0260] Example 3.41: Deletion of UE capability information

[0261] FIG17 is a fourth flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG17 , the method for deleting capability information of the user equipment UE includes the following steps:

[0262] Step 1701: The UE sends a deregistration status notification to the AMF via the RAN.

[0263] Step 1702: Based on the deregistration status notification, the AMF sends a capability deletion message to the CSMF.

[0264] Step 1703: Based on the capability deletion message, the CSMF deletes the locally stored UE capability information of the UE.

[0265] Step 1704: CMSF returns a capability deletion response to AMF.

[0266] Step 1705: The AMF returns a deregistration response to the UE via the RAN.

[0267] In this way, after the UE exits the distributed network, the CSMF will promptly delete the stored UE capability information according to the capability deletion message sent by the AMF, thereby releasing the storage resources of the CSMF in a timely manner.

[0268] Example 3.42: Deletion of UE capability information

[0269] FIG18 is a fifth flow chart of a method for deleting capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG17 , the method for deleting capability information of the user equipment UE includes the following steps:

[0270] Step 1801: After receiving the deregistration status sent by the UE through the RAN, the AMF sends a UE deregistration status notification to the CSMF.

[0271] Step 1802: Based on the UE deregistration status notification, the CSMF deletes the locally stored UE capability information of the UE.

[0272] In this way, after the UE exits the distributed network, according to the deregistration status notification sent by the AMF, the CSMF will promptly delete the stored UE capability information and release the storage resources of the CSMF in a timely manner.

[0273] Example 3.5: UE capability information reporting or updating

[0274] FIG19 is a flow chart of a method for reporting or updating capability information of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG19 , taking the case where the CSMF has wireless access capability as an example, the method for reporting capability information of the user equipment UE includes the following steps:

[0275] Step 1901: The UE directly sends a registration request to the CSMF. The registration request carries the UE capability information and related information such as the UE identifier. Alternatively, when the UE capability changes, the UE directly sends a capability update request to the CSMF. The capability update request carries the UE identifier and updated UE capability information.

[0276] Step 1902: The CSMF locally caches the mapping relationship between the UE identifier and the UE capability information of the UE. Alternatively, the CSMF updates the locally stored UE capability information of the UE.

[0277] Step 1903: The CSMF directly returns a registration response to the UE, and carries the CSMF identifier in the registration response. Alternatively, the CSMF directly returns a capability update response to the UE.

[0278] In this way, when the CSMF has wireless access capability, the UE can send messages directly to the CSMF without going through the wireless access network, saving the signaling overhead of the wireless access network.

[0279] FIG20 is a schematic structural diagram of a first network node provided by an embodiment of the present disclosure. As shown in FIG20 , the first network node includes a memory 2020, a transceiver 2000, and a processor 2010, wherein:

[0280] The memory 2020 is used to store computer programs; the transceiver 2000 is used to send and receive data under the control of the processor 2010; the processor 2010 is used to read the computer program in the memory 2020 and perform the following operations:

[0281] receiving a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE;

[0282] Sending a UE capability information acquisition request to the second network node based on the node identifier of the second network node;

[0283] Receive UE capability information of the UE sent by the second network node.

[0284] Specifically, the transceiver 2000 is used to receive and send data under the control of the processor 2010.

[0285] For example, in the embodiment of the present disclosure, the processor 2010 is further configured to perform the following operations:

[0286] receiving a capability update request sent by the UE, where the capability update request carries an identifier of the UE and updated UE capability information;

[0287] The updated UE capability information is sent to the second network node, and the second network node is instructed to update the UE capability information corresponding to the identifier of the UE.

[0288] For example, in the embodiment of the present disclosure, the processor 2010 is further configured to perform the following operations:

[0289] A capability deletion message is sent to the second network node, where the capability deletion message is used to instruct the second network node to delete UE capability information of the UE.

[0290] Illustratively, in an embodiment of the present disclosure, the sending a capability deletion message to the second network node includes:

[0291] receiving a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network;

[0292] Send a capability deletion message to the second network node.

[0293] For example, in the embodiment of the present disclosure, the processor 2010 is further configured to perform the following operations:

[0294] Based on the node identifier of the second network node, subscription information for UE capability information is sent to the second network node.

[0295] It should be noted here that the above-mentioned first network node provided in the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the first network node, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0296] FIG21 is a schematic structural diagram of a second network node provided by an embodiment of the present disclosure. As shown in FIG21 , the second network node includes a memory 2120, a transceiver 2100, and a processor 2110, wherein:

[0297] The memory 2120 is used to store computer programs; the transceiver 2100 is used to send and receive data under the control of the processor 2110; the processor 2110 is used to read the computer program in the memory 2120 and perform the following operations:

[0298] Receiving the UE capability information sent by the first network node to obtain the requested UE capability information;

[0299] sending UE capability information of the UE to the first network node;

[0300] The second network node stores UE capability information of the UE.

[0301] Specifically, the transceiver 2100 is used to receive and send data under the control of the processor 2110 .

[0302] For example, in the embodiment of the present disclosure, the processor 2110 is further configured to perform the following operations:

[0303] receiving a registration request sent by the UE, where the registration request includes UE capability information of the UE;

[0304] Storing UE capability information of the UE.

[0305] For example, in the embodiment of the present disclosure, the processor 2110 is further configured to perform the following operations:

[0306] receiving updated UE capability information of the UE sent by the first network node;

[0307] Based on the updated UE capability information, the UE capability information of the UE is updated.

[0308] For example, in the embodiment of the present disclosure, the processor 2110 is further configured to perform the following operations:

[0309] receiving a capability update request sent by the UE, where the capability update request carries an identifier of the UE and updated UE capability information;

[0310] The UE capability information of the UE is updated based on the identifier of the UE.

[0311] For example, in the embodiment of the present disclosure, the processor 2110 is further configured to perform the following operations:

[0312] receiving a capability deletion message sent by the first network node;

[0313] Based on the capability deletion message, UE capability information of the UE is deleted.

[0314] For example, in the embodiment of the present disclosure, the processor 2110 is further configured to perform the following operations:

[0315] receiving a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network;

[0316] Based on the deregistration status notification, UE capability information of the UE is deleted.

[0317] For example, in the embodiment of the present disclosure, the processor 2110 is further configured to perform the following operations:

[0318] Receive subscription information of the UE capability information sent by the first network node.

[0319] It should be noted here that the above-mentioned second network node provided in the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the second network node, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be specifically described here.

[0320] FIG22 is a schematic structural diagram of a user equipment UE provided in an embodiment of the present disclosure. As shown in FIG22 , the UE includes a memory 2220, a transceiver 2200, and a processor 2210, wherein:

[0321] The memory 2220 is used to store computer programs; the transceiver 2200 is used to send and receive data under the control of the processor 2210; the processor 2210 is used to read the computer program in the memory 2220 and perform the following operations:

[0322] Sending a registration request to the first network node, where the registration request carries a node identifier of the second network node, and the second network node stores UE capability information of the UE;

[0323] The registration request is used by the first network node to obtain UE capability information of the UE from the second network node.

[0324] Specifically, the transceiver 2200 is used to receive and send data under the control of the processor 2210.

[0325] For example, in the embodiment of the present disclosure, the processor 2210 is further configured to perform the following operations:

[0326] A registration request is sent to the second network node, where the registration request includes UE capability information of the UE.

[0327] For example, in the embodiment of the present disclosure, the processor 2210 is further configured to perform the following operations:

[0328] Sending a capability update request to the first network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0329] For example, in the embodiment of the present disclosure, the processor 2210 is further configured to perform the following operations:

[0330] A capability update request is sent to the second network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0331] For example, in the embodiment of the present disclosure, the processor 2210 is further configured to perform the following operations:

[0332] Sending a deregistration status notification to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete UE capability information of the UE in the second network node.

[0333] It should be noted that in Figures 20, 21, and 22, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits represented by one or more processors (represented by processors 2010, 2110, and 2210) and memory (represented by memory). The bus architecture may also link various other circuits, such as peripherals, voltage regulators, and power management circuits. These are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. A transceiver may be multiple components, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, or an optical cable. For different user devices, the user interface may also be an interface capable of connecting external or internal devices. Connected devices may include, but are not limited to, a keypad, display, speaker, microphone, joystick, and the like. The processor is responsible for managing the bus architecture and general processing, while the memory may store data used by the processor when performing operations.

[0334] Optionally, the processor may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0335] It should be noted here that the above-mentioned user equipment UE provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the user equipment UE, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0336] It should be noted here that the above-mentioned user equipment UE provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the user equipment UE, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0337] The present disclosure further provides a device for acquiring capability information of a user equipment (UE), which is applied to a first network node. For example, FIG. 23 is a schematic diagram of a structure of a device for acquiring capability information of a user equipment (UE) provided in an embodiment of the present disclosure. The device 230 for acquiring capability information of a user equipment (UE) may include:

[0338] The first receiving unit 2301 is configured to receive a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE;

[0339] The first sending unit 2302 is configured to send a UE capability information acquisition request to the second network node based on the node identifier of the second network node;

[0340] The second receiving unit 2303 is configured to receive the UE capability information of the UE sent by the second network node.

[0341] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0342] A third receiving unit is configured to receive a capability update request sent by the UE, where the capability update request carries an identifier of the UE and updated UE capability information;

[0343] The second sending unit is configured to send the updated UE capability information to the second network node, and instruct the second network node to update the UE capability information corresponding to the identifier of the UE.

[0344] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0345] The third sending unit is configured to send a capability deletion message to the second network node, where the capability deletion message is used to instruct the second network node to delete the UE capability information of the UE.

[0346] For example, in the embodiment of the present disclosure, the third sending unit is specifically configured to:

[0347] receiving a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network;

[0348] Send a capability deletion message to the second network node.

[0349] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0350] The fourth sending unit is configured to send subscription information of UE capability information to the second network node based on the node identifier of the second network node.

[0351] It should be noted here that the device 230 for obtaining user equipment UE capability information provided in the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the first network node, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0352] The present disclosure further provides a device for acquiring capability information of a user equipment (UE), which is applied to a second network node. For example, see FIG. 24 , which is a second structural diagram of the device for acquiring capability information of a user equipment (UE) provided in the present disclosure. The device 240 for acquiring capability information of the UE may include:

[0353] The first receiving unit 2401 is configured to receive a UE capability information acquisition request sent by a first network node;

[0354] A first sending unit 2402 is configured to send UE capability information of the UE to the first network node;

[0355] The second network node stores UE capability information of the UE.

[0356] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0357] A second receiving unit is configured to receive a registration request sent by the UE, where the registration request includes UE capability information of the UE;

[0358] A storage unit is configured to store the UE capability information of the UE.

[0359] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0360] a third receiving unit, configured to receive updated UE capability information of the UE sent by the first network node;

[0361] The first updating unit is configured to update the UE capability information of the UE based on the updated UE capability information.

[0362] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0363] a fourth receiving unit, configured to receive a capability update request sent by the UE, where the capability update request carries an identifier of the UE and updated UE capability information;

[0364] The second updating unit is configured to update the UE capability information of the UE based on the identifier of the UE.

[0365] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0366] A fifth receiving unit, configured to receive a capability deletion message sent by the first network node;

[0367] The first deleting unit is configured to delete the UE capability information of the UE based on the capability deletion message.

[0368] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0369] a sixth receiving unit, configured to receive a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network;

[0370] A second deleting unit is configured to delete the UE capability information of the UE based on the deregistration status notification.

[0371] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0372] A seventh receiving unit is configured to receive subscription information of the capability information sent by the first network node.

[0373] It should be noted here that the user equipment UE capability information acquisition device 240 provided in the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the second network node, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be specifically described here.

[0374] The present disclosure also provides a device for obtaining capability information of a user equipment (UE), which is applied to the user equipment (UE). For example, see FIG. 25 , which is a third structural diagram of the device for obtaining capability information of the user equipment (UE) provided in the present disclosure. The device 250 for obtaining capability information of the user equipment (UE) may include:

[0375] The first sending unit 2501 is configured to send a registration request to a first network node, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE;

[0376] The registration request is used by the first network node to obtain UE capability information of the UE from the second network node.

[0377] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0378] The second sending unit is configured to send a registration request to the second network node, where the registration request includes UE capability information of the UE.

[0379] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0380] The third sending unit is configured to send a capability update request to the first network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0381] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0382] The fourth sending unit is configured to send a capability update request to the second network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

[0383] For example, in an embodiment of the present disclosure, the apparatus further includes:

[0384] A fifth sending unit is configured to send a deregistration status notification to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete the UE capability information of the UE in the second network node.

[0385] It should be noted here that the user equipment UE capability information acquisition device 250 provided in the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the user equipment UE, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0386] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0387] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0388] On the other hand, an embodiment of the present disclosure further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, wherein the computer program is configured to cause the processor to execute the methods provided in the above embodiments, including:

[0389] Receive a registration request sent by the UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE; send a UE capability information acquisition request to the second network node based on the node identifier of the second network node; and receive the UE capability information of the UE sent by the second network node.

[0390] or,

[0391] Receive a UE capability information acquisition request sent by a first network node; send the UE capability information of the UE to the first network node; wherein the UE capability information of the UE is stored in the second network node.

[0392] or,

[0393] Send a registration request to the first network node, where the registration request carries a node identifier of the second network node, and the second network node stores UE capability information of the UE; wherein the registration request is used by the first network node to obtain the UE capability information of the UE from the second network node.

[0394] The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid-state drives (SSDs)), etc.

[0395] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0396] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0397] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0398] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0399] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A method for acquiring capability information of a user equipment UE, applied to a first network node, the method comprising: receiving a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE; Sending a UE capability information acquisition request to the second network node based on the node identifier of the second network node; Receive UE capability information of the UE sent by the second network node.

2. The method according to claim 1, wherein: The method further comprises: receiving a capability update request sent by the UE, wherein the capability update request carries an identifier of the UE and updated UE capability information; The updated UE capability information is sent to the second network node, and the second network node is instructed to update the UE capability information corresponding to the identifier of the UE.

3. The method according to claim 1 or 2, wherein: The method further comprises: A capability deletion message is sent to the second network node, where the capability deletion message is used to instruct the second network node to delete UE capability information of the UE.

4. The method according to claim 3, wherein: The sending a capability deletion message to the second network node includes: receiving a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network; Send a capability deletion message to the second network node.

5. The method according to claim 1 or 2, wherein: The method further comprises: Based on the node identifier of the second network node, subscription information of UE capability information is sent to the second network node.

6. A method for acquiring capability information of a user equipment UE, applied to a second network node, the method comprising: Receiving a UE capability information acquisition request sent by a first network node; sending UE capability information of the UE to the first network node; The second network node stores UE capability information of the UE.

7. The method according to claim 6, wherein: The method further comprises: receiving a registration request sent by the UE, where the registration request includes UE capability information of the UE; The UE capability information of the UE is stored.

8. The method according to claim 6 or 7, wherein: The method further comprises: receiving updated UE capability information of the UE sent by the first network node; Based on the updated UE capability information, the UE capability information of the UE is updated.

9. The method according to claim 6 or 7, wherein: The method further comprises: receiving a capability update request sent by the UE, wherein the capability update request carries an identifier of the UE and updated UE capability information; The UE capability information of the UE is updated based on the identifier of the UE.

10. The method according to claim 6 or 7, wherein: The method further comprises: receiving a capability deletion message sent by the first network node; Based on the capability deletion message, UE capability information of the UE is deleted.

11. The method according to claim 6 or 7, wherein: The method further comprises: receiving a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network; Based on the deregistration status notification, UE capability information of the UE is deleted.

12. The method according to claim 6 or 7, wherein: The method further comprises: Receive subscription information of the UE capability information sent by the first network node.

13. A method for acquiring capability information of a user equipment (UE), applied to a UE, the method comprising: Sending a registration request to the first network node, where the registration request carries a node identifier of the second network node, and the second network node stores UE capability information of the UE; The registration request is used by the first network node to receive the registration request from the second network node. Acquire UE capability information of the UE.

14. The method according to claim 13, wherein: The method further comprises: A registration request is sent to the second network node, where the registration request includes UE capability information of the UE.

15. The method according to claim 13 or 14, wherein: The method further comprises: A capability update request is sent to the first network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

16. The method according to claim 13 or 14, wherein: The method further comprises: A capability update request is sent to the second network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

17. The method according to claim 13 or 14, wherein: The method further comprises: A deregistration status notification is sent to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete the UE capability information of the UE in the second network node.

18. A first network node, comprising a memory, a transceiver, and a processor: Memory for storing computer programs; a transceiver, for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: receiving a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE; Sending a UE capability information acquisition request to the second network node based on the node identifier of the second network node; Receive UE capability information of the UE sent by the second network node.

19. The first network node according to claim 18, wherein: The processor is further configured to perform the following operations: receiving a capability update request sent by the UE, wherein the capability update request carries an identifier of the UE and updated UE capability information; The updated UE capability information is sent to the second network node, and the second network node is instructed to update the UE capability information corresponding to the identifier of the UE.

20. The first network node according to claim 18 or 19, wherein: The processor is further configured to perform the following operations: A capability deletion message is sent to the second network node, where the capability deletion message is used to instruct the second network node to delete UE capability information of the UE.

21. The first network node according to claim 20, wherein: The sending a capability deletion message to the second network node includes: receiving a deregistration status notification sent by the UE, where the deregistration status notification is used to instruct the UE to exit the distributed network; Send a capability deletion message to the second network node.

22. The first network node according to claim 18 or 19, wherein: The processor is further configured to perform the following operations: Based on the node identifier of the second network node, subscription information of UE capability information is sent to the second network node.

23. A second network node, comprising a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Receiving the UE capability information sent by the first network node to obtain the requested UE capability information; sending UE capability information of the UE to the first network node; in, The second network node stores UE capability information of the UE.

24. A user equipment UE, comprising a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; a processor for reading the computer program in the memory and executing The following operations: Sending a registration request to the first network node, where the registration request carries a node identifier of the second network node, and the second network node stores UE capability information of the UE; in, The registration request is used by the first network node to obtain UE capability information of the UE from the second network node.

25. A device for acquiring capability information of a user equipment UE, applied to a first network node, the device comprising: A first receiving unit, configured to receive a registration request sent by a UE, where the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE; A first sending unit, configured to send a UE capability information acquisition request to the second network node based on the node identifier of the second network node; The second receiving unit is configured to receive the UE capability information of the UE sent by the second network node.

26. A device for acquiring capability information of a user equipment UE, applied to a second network node, the device comprising: A first receiving unit, configured to receive a UE capability information acquisition request sent by a first network node; A first sending unit, configured to send UE capability information of the UE to the first network node; The second network node stores UE capability information of the UE.

27. A device for acquiring capability information of a user equipment (UE), applied to a UE, the device comprising: A first sending unit, configured to send a registration request to a first network node, wherein the registration request carries a node identifier of a second network node, and the second network node stores UE capability information of the UE; The registration request is used by the first network node to receive the registration request from the second network node. Acquire UE capability information of the UE.

28. The device according to claim 27, wherein The device also includes: The second sending unit is configured to send a registration request to the second network node, where the registration request includes UE capability information of the UE.

29. The device according to claim 27 or 28, wherein The device also includes: The third sending unit is used to send a capability update request to the first network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

30. The device according to claim 27 or 28, wherein: The device also includes: The fourth sending unit is used to send a capability update request to the second network node, where the capability update request carries the identifier of the UE and updated UE capability information, and the capability update request is used to update the UE capability information of the UE.

31. The device according to claim 27 or 28, wherein: The device also includes: A fifth sending unit is used to send a deregistration status notification to the first network node or the second network node, where the deregistration status notification is used to instruct the UE to exit the distributed network, and the deregistration status notification is used to delete the UE capability information of the UE in the second network node.

32. A processor-readable storage medium, wherein: The processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method for obtaining the capability information of the user equipment UE according to any one of claims 1 to 5; or execute the method for obtaining the capability information of the user equipment UE according to any one of claims 6 to 12; Alternatively, execute the method for acquiring user equipment UE capability information as described in any one of claims 13 to 17.

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