WO2022160123A1

WO2022160123A1 - Access mode selection method, terminal device, and network device

Info

Publication number: WO2022160123A1
Application number: PCT/CN2021/073953
Authority: WO
Inventors: 卢飞; 陈景然
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2022-08-04
Also published as: CN116508392A

Abstract

Embodiments of the present application relate to an access mode selection method, a terminal device, and a network device. The method comprises: a terminal device receives access indication information in a non-terrestrial network (NTN) from a first network device; and the terminal device selects a corresponding access mode according to the access indication information. According to the embodiments of the present application, the signaling waste during the establishment of a session can be reduced.

Description

Access mode selection method, terminal equipment and network equipment

technical field

The present application relates to the field of communications, and more particularly, to a method for selecting an access mode, a terminal device and a network device.

Background technique

In a non-terrestrial network (NTN, Non-Terrestrial Network) network, the distance between the user equipment (UE, User Equipment) and the satellite, and the distance between the satellite and the ground station are long, resulting in a long distance between the UE and the data network. The delay will be larger. Therefore, some services, such as vehicle wireless communication technology (V2X, Vehicle to X) services, are not suitable for use in the NTN network. Currently, only the network side perceives which services are suitable for use in the NTN network, and the UE cannot perceive which services are suitable for use in the NTN network. When the UE needs to establish a PDU session, the UE can carry the corresponding single network slice selection assistance information (S-NSSAI, Single-Network Slice Selection Assistance Information) and data network name (DNN, Data Network Name). Network side devices, such as Access and Mobility Management Function (AMF, Access and Mobility Management Function) or Session Management Function (SMF, Session Management Function), check whether S-NSSAI and DNN are suitable for use in NTN networks. When the S-NSSAI and DNN requested by the UE cannot be accepted by the network, the network side returns a rejection message to the UE. If the UE has multiple DNNs that are not suitable for use in the NTN network, the UE will be rejected by the network when the UE requests multiple times, which also results in a waste of signaling.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an access mode selection method, a terminal device, and a network device, which can reduce signaling waste in the process of establishing a session.

The embodiment of the present application proposes a method for selecting an access mode, including:

The terminal device receives the access indication information in the non-terrestrial network NTN from the first network device;

The terminal device selects the corresponding access mode according to the access indication information.

The embodiment of the present application also proposes an information indication method, including:

The first network device sends access indication information in the NTN to the terminal device, where the access indication information is used for the terminal device to select a corresponding access mode.

The second network device sends the access indication information in the NTN to the first network device, where the access indication information is used for the terminal device to select a corresponding access mode.

The embodiment of the present application also proposes a terminal device, including:

a first receiving module, configured to receive access indication information in the non-terrestrial network NTN from the first network device;

The selection module is used for selecting the corresponding access mode according to the access indication information.

The embodiment of the present application also proposes a first network device, including:

The first sending module is configured to send access indication information in the NTN to the terminal equipment, where the access indication information is used for the terminal equipment to select a corresponding access mode.

The embodiment of the present application also proposes a second network device, including:

The second sending module is configured to send access indication information in the NTN to the first network device, where the access indication information is used for the terminal device to select a corresponding access mode.

An embodiment of the present application further proposes a terminal device, including: a processor, a memory, and a transceiver, where the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and control the transceiver to execute the above-mentioned The method of any one.

An embodiment of the present application also proposes a network device, including: a processor, a memory, and a transceiver, where the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and control the transceiver to execute the above The method of any one.

An embodiment of the present application further proposes a chip, including: a processor, configured to call and run a computer program from a memory, so that a device on which the chip is installed executes any of the methods described above.

An embodiment of the present application further provides a computer-readable storage medium for storing a computer program, where the computer program causes a computer to execute the method described in any of the foregoing.

The embodiments of the present application also provide a computer program product, including computer program instructions, the computer program instructions enable a computer to execute the method according to any one of the preceding claims.

The embodiment of the present application further provides a computer program, and the computer program causes a computer to execute the method described in any one of the above.

By selecting the corresponding access mode according to the access indication information in the NTN, the embodiment of the present application avoids the situation of being rejected by the network side due to the request for a PDU session that is not suitable for the NTN network, thereby reducing the waste of signaling in the process of establishing the session.

Description of drawings

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

FIG. 2 is a schematic diagram of a PDU session establishment process 200 in a 5G network.

FIG. 3 is a schematic flowchart of a method 300 for selecting an access mode according to an embodiment of the present application.

FIG. 4 is an implementation flowchart of Embodiment 1 of the present disclosure.

FIG. 5 is an implementation flowchart of Embodiment 2 of the present disclosure.

FIG. 6 is a schematic flowchart of an information indication method 600 according to an embodiment of the present application.

FIG. 7 is a schematic flowchart of an information indication method 700 according to an embodiment of the present application.

FIG. 8 is a schematic structural diagram of a terminal device 800 according to an embodiment of the present application.

FIG. 9 is a schematic structural diagram of a first network device 900 according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of a first network device 1000 according to an embodiment of the present application.

FIG. 11 is a schematic structural diagram of a second network device 1100 according to an embodiment of the present application.

FIG. 12 is a schematic structural diagram of a communication device 1200 according to an embodiment of the present application.

FIG. 13 is a schematic structural diagram of a chip 1300 according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

It should be noted that the terms "first" and "second" in the description and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. order. The objects described by "first" and "second" described at the same time may be the same or different.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (Advanced long term evolution, LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) unlicensed spectrum (NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation , 5G) system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc., the embodiments of the present application can also be applied to these communications system.

Optionally, the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.

This embodiment of the present application does not limit the applied spectrum. For example, the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.

The embodiments of this application describe various embodiments in conjunction with network equipment and terminal equipment, where: terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

A network device can be a device used to communicate with a mobile device. The network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a WCDMA A base station (NodeB, NB), it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, wearable device, and network equipment (gNB) in NR networks Or network equipment in the PLMN network that evolves in the future.

In this embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (for example, a frequency domain resource). The cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship. For example, if A indicates B, it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the embodiments of the present application. protected range.

1 is a schematic diagram of an architecture 100 of a 5G NTN network. As shown in Figure 1, the UE establishes a communication connection with the frequency domain remote unit (Radio Frequency Remote Unit) through the NR-Uu interface, and the frequency domain remote unit (Radio Frequency Remote Unit) communicates with the remote unit in the base station through the NR-Uu interface. The radio frequency unit (RRU, Remote Radio Unit) establishes a communication connection, the base station establishes a communication connection with the 5G core network (CN, Core Network) through the N1/2/3 interface, and the 5G core network establishes a connection with the data network through the N6 interface.

FIG. 2 is a schematic diagram of a session establishment process 200 of a Packet Data Unit (PDU, Packet Data Unit) in a 5G network, including:

Step 1: The UE initiates the registration process, and the network side allocates a 5G globally unique temporary UE identity (5G-GUTI, 5G Globally Unique Temporary UE Identity) to the UE during the registration process.

Step 2, when the UE needs to send data, the UE requests to establish a PDU session, and the UE sends an uplink NAS transmission message to the AMF, which carries the PDU session identifier (ID), S-NSSAI, DNN, request type and PDU session establishment. request message; wherein, the PDU session establishment request message further includes parameters such as PDU session ID, PDU session type and so on. S-NSSAI identifies a network slice, and the division of network slices is mainly used for admission control, network selection, and resource separation.

Step 3, AMF selects SMF according to S-NSSAI and DNN, and sends Nsmf_PDUsession_CreateSMcontext Request message to the selected SMF, the message carries PDU session ID, AMF ID and PDU session establishment request message.

Step 4, the SMF obtains the subscription data from the UDM, and the request message may carry the S-NSSAI and the DNN.

Step 5, the UDM returns subscription data to the SMF, where the subscription data includes the allowed PDU session type, default QoS parameters, and the like.

Step 6, the SMF sends a session management policy association request message to the PCF.

Step 7, the PCF returns a session management policy establishment association response message to the SMF, which carries a default policy and a charging control (PCC, policy and charging control rule) rule.

Step 8, the SMF returns the Nsmf_PDUsession_CreateSMcontext Response message to the AMF, and the message carries the SMF index identifier (context ID).

Step 10, the SMF selects the UPF, and sends an N4 establishment request message to the UPF, the message carrying the PDU session ID, the quality of service flow ID (QoS flow ID) and the QoS parameters.

Step 11, the UPF returns an N4 setup response message, which carries the IP address and TEID allocated by the UPF.

Step 12, SMF sends Namf_Communication_N1N2Message Transfer to AMF, the message carries PDU session ID, PDU session establishment accept message and N2-PDU session establishment request message, and the PDU session establishment accept message carries PDU session ID, QoS flow ID, QoS parameters and QoS rules; the N2-PDU session establishment request message carries the PDU session ID, QoS parameters, QoS flow ID, IP address and tunnel endpoint identifier (TEID, Tunnel End Point identifier) allocated by UPF.

Step 13, the AMF forwards the N2-PDU session establishment request message to the 5G Radio Access Network (NG-RAN, Next Generation Radio Access Network).

Step 14, the NG-RAN performs RRC reconfiguration; and carries a NAS container-PDU session establishment accept message.

Step 15, the UE returns an RRC reconfiguration complete message to the NG-RAN.

Step 16, the NG-RAN returns an N2-PDU session establishment accept message to the AMF, and the message carries the PDU session ID, the IP address and the TEID allocated by the NG-RAN.

Step 17, the AMF forwards the N2-PDU session establishment acceptance to the SMF through the Nsmf_PDUsession_UpdateSMcontext Request message.

Step 18, the SMF sends an N4 modification request message to the UPF, and the message carries the IP address and TEID allocated by the NG-RAN.

Step 19, the UPF returns an N4 modification response message.

Step 20, the SMF returns an Nsmf_PDUsession_UpdateSMcontext Response message to the AMF.

During the above-mentioned PDU session establishment process, if the S-NSSAI and DNN requested by the UE in the above-mentioned step 2 cannot be accepted by the network, the network side returns a rejection message to the UE (the rejection message can be returned after the above-mentioned step 2 or step 3) . If there are multiple S-NSSAIs or DNNs of the UE that are not suitable for use in the NTN network, the UE will be rejected by the network when the UE requests multiple times, which also causes waste of signaling.

In view of this, an embodiment of the present application proposes a method for selecting an access mode. FIG. 3 is a schematic flowchart of a method 300 for selecting an access mode according to an embodiment of the present application, and the method can optionally be applied to FIG. 1 . system shown, but not limited thereto. The method includes at least some of the following.

S310: The terminal device receives the access indication information in the NTN from the first network device;

S320: The terminal device selects a corresponding access mode according to the access indication information.

The terminal device can select an access mode suitable for the NTN network according to the access indication information in the NTN, which avoids multiple access requests being rejected by the network, thereby reducing the waste of signaling in the process of establishing a session.

The access indication information proposed by the present disclosure may include at least the following two forms:

First, the access indication information includes at least one DNN applicable to NTN;

Second, the access indication information is used to indicate whether the PDU session is suitable for use in NTN.

The above two forms are described in detail below in conjunction with the embodiments.

In an embodiment, the above-mentioned access indication information includes: at least one DNN suitable for NTN. The access indication information may be in the form of a DNN list (DNN list), and the DNN list includes at least one DNN suitable for NTN. The terminal device may select a DNN from at least one DNN applicable to the NTN according to the access indication information, and use the selected DNN to initiate a PDU session establishment request.

For example, in the above step S102, the terminal device selects a corresponding access mode according to the access indication information, including:

the terminal device determines the first DNN from at least one DNN applicable to the NTN;

Using the first DNN, the terminal device requests to establish a PDU session.

Optionally, the above-mentioned first network device may be an AMF.

Example 1:

FIG. 4 is an implementation flowchart of Embodiment 1 of the present disclosure. In this embodiment, the first network device is an AMF as an example for introduction. As shown in Figure 4, Embodiment 1 of the present disclosure includes the following steps:

S401: The UE initiates a registration process, and sends a registration request message to the AMF, where the registration request message carries a user ID and a registration type.

S402: The AMF sends an Npcf Access and Mobility Policy Control Create Request (Npcf_AMPolicyControl Create Request) message to the PCF, and the message carries a User Permanent Identifier (SUPI, Subscription Permanent Identifier), an access type, and a location information service network identifier (such as a public Land mobile network identification (PLMN ID, Public Land Mobile Network ID)), etc.

S403: The PCF sends an Npcf access and mobility policy control create response (Npcf_AMPolicyControl Create Response) message to the AMF, where the message carries policy information related to access and mobility management; the policy information related to access and mobility management carries At least one DNN suitable for NTN network, such as DNN list suitable for NTN network.

S404: The AMF carries the 5G-GUTI and the registration area in the registration acceptance message, and carries at least one DNN applicable to the NTN network, such as a DNN list applicable to the NTN network, in the registration acceptance message.

S405: The UE returns a registration complete message to the AMF, which is used to confirm that the 5G-GUTI allocated in step S404 has taken effect.

S406: The UE selects a DNN from at least one DNN applicable to the NTN network, such as selecting a first DNN from at least one DNN applicable to the NTN network; the UE sends an uplink NAS transmission message to the AMF, and the uplink NAS transmission message carries the first DNN A DNN and PDU session establishment request message. The NAS transmission message may also carry the PDU session identifier, S-NSSAI and request type; wherein, the PDU session establishment request message further includes parameters such as the PDU session ID and the PDU session type.

The steps performed thereafter are the same as steps 3 to 20 in FIG. 2 . Since the UE chooses to use the DNN applicable to the NTN network to request the establishment of a PDU session during the registration process, it will not be rejected by the network because it detects that the DNN carried in the PDU session establishment request is not applicable to NTN, thus avoiding Cause signaling waste.

In another embodiment, the above-mentioned access indication information is used to indicate whether the PDU session is suitable for use in NTN. Specifically, it can be indicated whether the PDU session to be established is suitable for use in NTN.

Correspondingly, selecting the corresponding access mode by the terminal device according to the access indication information may include:

If the access indication information indicates that the PDU session is suitable for use in NTN, the terminal device initiates a PDU session establishment request;

Alternatively, if the access indication information indicates that the PDU session is not suitable for use in NTN, the terminal device does not initiate a PDU session establishment request.

Optionally, the above-mentioned first network device may be an AMF.

Example 2:

FIG. 5 is an implementation flowchart of Embodiment 2 of the present disclosure. In this embodiment, the first network device is an AMF as an example for introduction. As shown in Figure 5, Embodiment 2 of the present disclosure includes the following steps:

S501: The UE initiates a registration process, and sends a registration request message to the AMF, where the registration request message carries a user ID and a registration type.

S502: The AMF sends an Npcf access and mobility policy control establishment request (Npcf_AMPolicyControl Create Request) message to the PCF, and the message carries a user permanent identifier (SUPI, Subscription Permanent Identifier), an access type, and a location information service network identifier (such as a public Land mobile network identification (PLMN ID, Public Land Mobile Network ID)), etc.

S503: The PCF sends an Npcf access and mobility policy control establishment response (Npcf_AMPolicyControl Create Response) message to the AMF.

S504: The AMF carries the 5G-GUTI and the registration area in the registration accept message.

S505: The UE returns a registration complete message to the AMF, which is used to confirm that the 5G-GUTI allocated in step S504 has taken effect.

S506: The PCF sends a UE policy control update indication request (Npcf_UEPolicyControl UpdateNotify Request) message to the AMF, the message carries UE policy data (UE Policy), and the UE policy data includes user equipment routing policy (URSP, UE Route Selection Policy) rules, An indication parameter may be carried in the URSP rule, and the indication parameter is used to indicate whether the PDU session to be established by the UE is suitable for use in NTN.

Table 1 is an example of the content of a URSP rule.

Table 1

Table 2 is an example of the content of the Route Selection Descriptors (RSD, Route Selection Descriptors) list in the URSP rule.

Table 2

In this embodiment, an indication parameter is carried in the RSD list in the URSP rule, which is used to indicate the above-mentioned access indication information. The access indication information indicates whether the PDU session to be established by the UE is suitable for use in NTN, that is, to indicate the PDU to be established by the UE. Whether the session applies to access over the cellular network or over the NTN network. If the PDU session to be established by the UE is indicated to be suitable for access via the cellular network, the PDU session to be established on behalf of the UE is not suitable for use in NTN; The established PDU session is suitable for use in NTN.

S507: The AMF returns an Npcf_UEPolicyControl UpdateNotify Response message to the PCF.

S508: The AMF sends a downlink NAS delivery message to the UE, where the downlink NAS delivery message carries UE policy data (UE Policy), the UE policy data carries a URSP rule, and the URSP rule carries the above-mentioned access indication information. The manner of carrying the access indication information in the URSP rule is the same as that in step S506, that is, the URSP rule includes an RSD list, and the RSD list carries the above-mentioned access indication information. Specifically, as shown in Table 2, an indication parameter is carried in the RSD list to indicate access indication information. The access indication information indicates whether the PDU session to be established by the UE is suitable for use in NTN, that is, to indicate the PDU to be established by the UE. Whether the session applies to access over the cellular network or over the NTN network.

S509: The UE returns an uplink NAS delivery message to the AMF, which is used to confirm that the UE policy data is successfully received;

S510: The AMF sends an Npcf_UEPolicyControl Update Request message to the PCF to confirm that the UE policy data is successfully received;

S511: The PCF returns an Npcf_UEPolicyControl Update Response message to the AMF.

S512: When the UE needs to send data, it decides whether to initiate a PDU session establishment request according to the access indication information received in step S508. If the access indication information indicates that the PDU session to be established by the UE is suitable for use in the NTN, the UE requests to establish a PDU session. If the access indication information indicates that the PDU session to be established by the UE is not suitable for use in NTN, the UE does not initiate a PDU session establishment request.

Since the UE can know whether the PDU session to be established is suitable for use in NTN through the access indication information, if it is not suitable, the UE does not initiate a PDU session establishment request in the NTN network, so it can avoid possible signaling rejection and Unnecessary signaling overhead issues.

The present disclosure also proposes an information indication method. FIG. 6 is a schematic flowchart of an information indication method 600 according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG. 1 , but is not limited to this. The method includes at least some of the following.

S610: The first network device sends access indication information in the NTN to the terminal device, where the access indication information is used for the terminal device to select a corresponding access mode.

Optionally, the above-mentioned access indication information includes: at least one DNN suitable for NTN.

Optionally, the above-mentioned first network device sends access indication information in the NTN to the terminal device, including:

The first network device sends a registration acceptance message to the terminal device, where the registration acceptance message carries at least one DNN applicable to the NTN.

Optionally, the above method further includes: the first network device receives an access and mobility policy control establishment response message from the second network device, where the access and mobility policy control establishment response message carries at least one DNN applicable to NTN.

Optionally, the above-mentioned access indication information indicates whether the PDU session is suitable for use in NTN.

The first network device sends a downlink NAS delivery message to the terminal device, where the downlink NAS delivery message carries UE policy data, the UE policy data carries a URSP rule, and the URSP rule carries the access indication information.

Optionally, the above method further includes:

The first network device receives a UE policy control update indication request message from the second network device, where the UE policy control update indication request message carries UE policy data, the UE policy data carries a URSP rule, and the URSP rule carries the access indication information.

Optionally, the above-mentioned first network device includes AMF.

Optionally, the above-mentioned second network device includes a policy control function PCF.

The present disclosure also proposes an information indication method. FIG. 7 is a schematic flowchart of an information indication method 700 according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG. 1 , but is not limited to this. The method includes at least some of the following.

S710: The second network device sends the access indication information in the NTN to the first network device, where the access indication information is used for the terminal device to select a corresponding access mode.

Optionally, the above-mentioned second network device sends access indication information in the NTN network to the first network device, including:

The second network device sends an access and mobility policy control establishment response message to the first network device, where the access and mobility policy control establishment response message carries the at least one DNN applicable to the NTN.

Optionally, the above-mentioned access indication information indicates whether the to-be-established PDU session is suitable for use in NTN.

The second network device sends a UE policy control update indication request message to the first network device, where the UE policy control update indication request message carries UE policy data, the UE policy data carries a URSP rule, and the URSP rule carries the access indication information.

Optionally, the above-mentioned first network device includes AMF.

Optionally, the above-mentioned second network device includes a PCF.

An embodiment of the present application further proposes a terminal device. FIG. 8 is a schematic structural diagram of a terminal device 800 according to an embodiment of the present application, including:

a first receiving module 810, configured to receive access indication information in the non-terrestrial network NTN from the first network device;

The selection module 820 is configured to select a corresponding access mode according to the access indication information.

Optionally, the above-mentioned access indication information includes: at least one data network name DNN suitable for NTN.

Optionally, the above-mentioned selection module 820 is used for:

A first DNN is determined from at least one DNN applicable to the NTN, with which the establishment of a packet data unit PDU session is requested.

Optionally, the above-mentioned first receiving module 810 is used for:

A registration accept message is received from the first network device, the registration accept message carrying at least one data network name DNN applicable to the NTN.

Optionally, the above-mentioned selection module 820 is used for:

Send a non-access stratum NAS transmission message to the first network device, where the NAS transmission message carries the first DNN and the PDU session establishment request message.

Optionally, the above-mentioned access indication information is used to indicate whether the PDU session is suitable for use in NTN.

Optionally, the above-mentioned selection module 820 is used for:

If the access indication information indicates that the PDU session is suitable for use in NTN, a PDU session establishment request is initiated.

Optionally, the above-mentioned selection module 820 is used for:

If the access indication information indicates that the PDU session is not suitable for use in NTN, the PDU session establishment request is not initiated.

Optionally, the above-mentioned first receiving module 810 is used for:

A downlink NAS delivery message is received from the first network device, where the downlink NAS delivery message carries UE policy data, the UE policy data carries a user equipment routing policy URSP rule, and the URSP rule carries access indication information.

Optionally, the above-mentioned first network device includes an access and mobility management function AMF.

It should be understood that the above and other operations and/or functions of the modules in the terminal device according to the embodiments of the present application are respectively to implement the corresponding process of the terminal device in the method 300 in FIG. 3 , and are not repeated here for brevity.

An embodiment of the present application further proposes a first network device. FIG. 9 is a schematic structural diagram of a first network device 900 according to an embodiment of the present application, including:

The first sending module 910 is configured to send access indication information in the NTN to the terminal equipment, where the access indication information is used for the terminal equipment to select a corresponding access mode.

Optionally, the above-mentioned first sending module 910 is used for:

A registration acceptance message is sent to the terminal device, where the registration acceptance message carries at least one DNN applicable to the NTN.

An embodiment of the present application further proposes another first network device. FIG. 10 is a schematic structural diagram of a first network device 1000 according to an embodiment of the present application. As shown in FIG. 10 , the first network device further includes:

The second receiving module 1020 is configured to receive an access and mobility policy control establishment response message from the second network device, where the access and mobility policy control establishment response message carries at least one DNN applicable to the NTN.

Optionally, the above-mentioned first sending module 910 is used for:

A downlink NAS delivery message is sent to the terminal device, the downlink NAS delivery message carries UE policy data, the UE policy data carries URSP rules, and the URSP rules carry access indication information.

Optionally, as shown in FIG. 10 , the first network device further includes:

The third receiving module 1030 is configured to receive a UE policy control update indication request message from the second network device, the UE policy control update indication request message carrying UE policy data, the UE policy data carrying URSP rules, and the URSP rules carrying access indication information.

Optionally, the above-mentioned first network device includes AMF.

It should be understood that the above and other operations and/or functions of the modules in the first network device according to the embodiments of the present application are respectively to implement the corresponding processes of the first network device in the method 600 of FIG. Repeat.

An embodiment of the present application further proposes a second network device. FIG. 11 is a schematic structural diagram of a second network device 1100 according to an embodiment of the present application, including:

The second sending module 1110 is configured to send the access indication information in the NTN to the first network device, where the access indication information is used for the terminal device to select a corresponding access mode.

Optionally, the above-mentioned second sending module 1110 is used for:

An access and mobility policy control establishment response message is sent to the first network device, where the access and mobility policy control establishment response message carries at least one DNN applicable to the NTN.

Optionally, the above-mentioned second sending module 1110 is used for:

Send a UE policy control update indication request message to the first network device, where the UE policy control update indication request message carries UE policy data, the UE policy data carries URSP rules, and the URSP rules carry access indication information.

Optionally, the above-mentioned first network device includes AMF.

Optionally, the above-mentioned second network device includes a PCF.

It should be understood that the above and other operations and/or functions of the modules in the second network device according to the embodiments of the present application are respectively to implement the corresponding processes of the second network device in the method 700 in FIG. Repeat.

It should be noted that the functions described by the respective modules (submodules, units or components, etc.) in the terminal device 800 , the first network device 900 , the first network device 1000 , and the second network device 1100 in the embodiments of the present application may be described by Different modules (sub-modules, units or components, etc.) can also be implemented by the same module (sub-modules, units or components, etc.). For example, the first sending module and the second sending module can be different modules, It may also be the same module, all of which can implement its corresponding functions in the embodiments of the present application. In addition, the sending module and the receiving module in the embodiments of the present application may be implemented by the transceiver of the device, and some or all of the other modules may be implemented by the processor of the device.

FIG. 12 is a schematic structural diagram of a communication device 1200 according to an embodiment of the present application. The communication device 1200 shown in FIG. 12 includes a processor 1210, and the processor 1210 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 12 , the communication device 1200 may further include a memory 1220 . The processor 1210 may call and run a computer program from the memory 1220 to implement the methods in the embodiments of the present application.

The memory 1220 may be a separate device independent of the processor 1210, or may be integrated in the processor 1210.

Optionally, as shown in FIG. 12 , the communication device 1200 may further include a transceiver 1230, and the processor 1210 may control the transceiver 1230 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.

Among them, the transceiver 1230 may include a transmitter and a receiver. The transceiver 1230 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 1200 may be a terminal device of this embodiment of the present application, and the communication device 1200 may implement the corresponding processes implemented by the terminal device in each method of this embodiment of the present application, which is not repeated here for brevity.

Optionally, the communication device 1200 may be the first network device or the second network device in this embodiment of the present application, and the communication device 1200 may implement the first network device or the second network device in each method in the embodiment of the present application. For the sake of brevity, the corresponding process of implementation will not be repeated here.

FIG. 13 is a schematic structural diagram of a chip 1300 according to an embodiment of the present application. The chip 1300 shown in FIG. 13 includes a processor 1310, and the processor 1310 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 13 , the chip 1300 may further include a memory 1320 . The processor 1310 may call and run a computer program from the memory 1320 to implement the methods in the embodiments of the present application.

The memory 1320 may be a separate device independent of the processor 1310, or may be integrated in the processor 1310.

Optionally, the chip 1300 may further include an input interface 1330 . The processor 1310 can control the input interface 1330 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1300 may further include an output interface 1340 . The processor 1310 may control the output interface 1340 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

Optionally, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which is not repeated here for brevity.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.

The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an off-the-shelf programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC) or Other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor or the like.

The memory mentioned above may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM).

It should be understood that the above memory is an example but not a limitative description, for example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions may be stored on or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted over a wire from a website site, computer, server or data center (eg coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a Solid State Disk (SSD)), and the like.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or substitutions. Covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

An access mode selection method, comprising:

The terminal device receives the access indication information in the non-terrestrial network NTN from the first network device;

The terminal device selects a corresponding access mode according to the access indication information.
The method according to claim 1, wherein the access indication information comprises: at least one data network name DNN suitable for NTN.
The method according to claim 2, wherein the terminal device selects a corresponding access mode according to the access indication information, comprising:

The terminal device determines the first DNN from the at least one DNN applicable to the NTN;

Using the first DNN, the terminal device requests the establishment of a packet data unit PDU session.
The method according to claim 2 or 3, wherein the terminal device receives access indication information in the NTN from the first network device, comprising:

The terminal device receives a registration acceptance message from the first network device, where the registration acceptance message carries the at least one data network name DNN applicable to the NTN.
The method according to claim 3 or 4, wherein the terminal device uses the first DNN to request the establishment of a PDU session, comprising:

The terminal device sends a non-access stratum NAS transmission message to the first network device, where the NAS transmission message carries the first DNN and a PDU session establishment request message.
The method of claim 1, wherein the access indication information is used to indicate whether the PDU session is suitable for use in NTN.
The method according to claim 6, wherein the terminal device selects a corresponding access mode according to the access indication information, comprising:

If the access indication information indicates that the PDU session is suitable for use in NTN, the terminal device initiates a PDU session establishment request.
The method according to claim 6, wherein the terminal device selects a corresponding access mode according to the access indication information, comprising:

If the access indication information indicates that the PDU session is not suitable for use in NTN, the terminal device does not initiate a PDU session establishment request.
The method according to any one of claims 6 to 8, wherein the terminal device receives the access indication information in the NTN from the first network device, comprising:

The terminal device receives a downlink NAS delivery message from the first network device, where the downlink NAS delivery message carries UE policy data, the UE policy data carries a user equipment routing policy URSP rule, and the URSP rule carries the access indication information.
The method according to any one of claims 1 to 9, the first network equipment comprising an access and mobility management function AMF.
An information indicating method, comprising:

The first network device sends access indication information in the NTN to the terminal device, where the access indication information is used for the terminal device to select a corresponding access mode.
The method of claim 11, wherein the access indication information comprises: at least one DNN suitable for NTN.
The method according to claim 12, wherein the first network device sends access indication information in the NTN to the terminal device, comprising:

The first network device sends a registration acceptance message to the terminal device, where the registration acceptance message carries the at least one DNN applicable to the NTN.
The method of claim 12 or 13, further comprising:

The first network device receives an access and mobility policy control setup response message from the second network device, where the access and mobility policy control setup response message carries the at least one DNN applicable to the NTN.
11. The method of claim 11, the access indication information indicates whether the PDU session is suitable for use in NTN.
The method according to claim 15, wherein the first network device sends access indication information in the NTN to the terminal device, comprising:

The first network device sends a downlink NAS delivery message to the terminal device, where the downlink NAS delivery message carries UE policy data, the UE policy data carries a URSP rule, and the URSP rule carries the access indication information.
The method of claim 15 or 16, further comprising:

The first network device receives a UE policy control update indication request message from the second network device, the UE policy control update indication request message carries UE policy data, the UE policy data carries a URSP rule, and the URSP rule carries the Access indication information.
According to the method of any one of claims 11 to 17, the first network device comprises an AMF.
The method according to any one of claims 11 to 18, the second network device comprising a policy control function PCF.
An information indicating method, comprising:

The second network device sends access indication information in the NTN to the first network device, where the access indication information is used for the terminal device to select a corresponding access mode.
The method of claim 20, wherein the access indication information comprises: at least one DNN suitable for NTN.
The method according to claim 21, wherein the second network device sends access indication information in the NTN network to the first network device, comprising:

The second network device sends an access and mobility policy control establishment response message to the first network device, where the access and mobility policy control establishment response message carries the at least one DNN applicable to the NTN.
The method of claim 20, wherein the access indication information indicates whether the PDU session to be established is suitable for use in NTN.
The method according to claim 23, wherein the second network device sends access indication information in the NTN network to the first network device, comprising:

The second network device sends a UE policy control update indication request message to the first network device, the UE policy control update indication request message carries UE policy data, the UE policy data carries URSP rules, and the URSP rules carry the access Instructions.
The method of any one of claims 20 to 24, the first network device comprising an AMF.
The method of any one of claims 20 to 25, the second network device comprising a PCF.
A terminal device including:

a first receiving module, configured to receive access indication information in the non-terrestrial network NTN from the first network device;

The selection module is configured to select a corresponding access mode according to the access indication information.
The terminal device according to claim 27, wherein the access indication information comprises: at least one data network name DNN suitable for NTN.
The terminal device according to claim 28, wherein the selection module is used for:

A first DNN is determined from the at least one DNN applicable to the NTN, with which the establishment of a packet data unit PDU session is requested.
The terminal device according to claim 28 or 29, wherein the first receiving module is used for:

A registration accept message is received from the first network device, the registration accept message carries the at least one data network name DNN applicable to the NTN.
The terminal device according to claim 29 or 30, wherein the selection module is used for:

Send a non-access stratum NAS transmission message to the first network device, where the NAS transmission message carries the first DNN and the PDU session establishment request message.
The terminal device according to claim 27, wherein the access indication information is used to indicate whether the PDU session is suitable for use in NTN.
The terminal device according to claim 32, wherein the selection module is used for:

If the access indication information indicates that the PDU session is suitable for use in NTN, a PDU session establishment request is initiated.
The terminal device according to claim 32, wherein the selection module is used for:

If the access indication information indicates that the PDU session is not suitable for use in NTN, the PDU session establishment request is not initiated.
The terminal device according to any one of claims 32 to 34, wherein the first receiving module is configured to:

A downlink NAS delivery message is received from the first network device, where the downlink NAS delivery message carries UE policy data, the UE policy data carries a user equipment routing policy URSP rule, and the URSP rule carries the access indication information.
The terminal device according to any one of claims 27 to 35, the first network device comprising an access and mobility management function AMF.
A first network device, comprising:

The first sending module is configured to send access indication information in the NTN to the terminal equipment, where the access indication information is used for the terminal equipment to select a corresponding access mode.
The first network device according to claim 37, wherein the access indication information comprises: at least one DNN suitable for NTN.
The first network device according to claim 38, wherein the first sending module is configured to:

A registration acceptance message is sent to the terminal device, where the registration acceptance message carries the at least one DNN applicable to the NTN.
The first network device according to claim 38 or 39, further comprising:

The second receiving module is configured to receive an access and mobility policy control establishment response message from the second network device, where the access and mobility policy control establishment response message carries the at least one DNN applicable to the NTN.
The first network device of claim 37, the access indication information indicating whether the PDU session is suitable for use in NTN.
The first network device according to claim 41, wherein the first sending module is used for:

Send a downlink NAS delivery message to the terminal device, where the downlink NAS delivery message carries UE policy data, the UE policy data carries a URSP rule, and the URSP rule carries the access indication information.
The first network device according to claim 41 or 42, further comprising:

A third receiving module, configured to receive a UE policy control update indication request message from the second network device, where the UE policy control update indication request message carries UE policy data, the UE policy data carries URSP rules, and the URSP rules carry all the access indication information.
The first network device according to any one of claims 37 to 43, the first network device comprising an AMF.
The first network device according to any one of claims 37 to 44, the second network device comprising a policy control function PCF.
A second network device, comprising:

The second sending module is configured to send access indication information in the NTN to the first network device, where the access indication information is used for the terminal device to select a corresponding access mode.
The second network device according to claim 46, wherein the access indication information comprises: at least one DNN suitable for NTN.
The second network device according to claim 47, wherein the second sending module is used for:

An access and mobility policy control establishment response message is sent to the first network device, where the access and mobility policy control establishment response message carries the at least one DNN applicable to the NTN.
The second network device according to claim 46, wherein the access indication information indicates whether the PDU session to be established is suitable for use in NTN.
The second network device according to claim 49, wherein the second sending module is used for:

Send a UE policy control update indication request message to the first network device, where the UE policy control update indication request message carries UE policy data, the UE policy data carries a URSP rule, and the URSP rule carries the access indication information.
The second network device according to any one of claims 46 to 50, the first network device comprising AMF.
The second network device according to any one of claims 46 to 51, the second network device comprising a PCF.
A terminal device, comprising: a processor, a memory and a transceiver, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and control the transceiver, execute the right The method of any one of claims 1 to 10.
A network device, comprising: a processor, a memory and a transceiver, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and control the transceiver, execute the right The method of any one of claims 11 to 26.
A chip, comprising: a processor for calling and running a computer program from a memory, so that a device on which the chip is installed executes the method according to any one of claims 1 to 10.
A chip, comprising: a processor for invoking and running a computer program from a memory, so that a device on which the chip is installed executes the method as claimed in any one of claims 11 to 26.
A computer-readable storage medium storing a computer program that causes a computer to perform the method of any one of claims 1 to 10.
A computer-readable storage medium storing a computer program that causes a computer to perform the method of any one of claims 11 to 26.
A computer program product comprising computer program instructions that cause a computer to perform the method of any one of claims 1 to 10.
A computer program product comprising computer program instructions that cause a computer to perform the method of any one of claims 11 to 26.
A computer program that causes a computer to perform the method of any one of claims 1 to 10.
A computer program that causes a computer to perform the method of any one of claims 11 to 26.