CN-122029927-A - Data transmission method

CN122029927ACN 122029927 ACN122029927 ACN 122029927ACN-122029927-A

Abstract

A data transmission method is executed in a first network node of a Radio Access Network (RAN), and comprises the steps of receiving a first connection establishment request message related to a first data transmission bearer, wherein the first connection establishment request message comprises identification information of a service type or a function type associated with non-User Equipment (UE), or identification information of a plurality of UEs, the first data transmission bearer is used for transmitting data between the first network node and a second network node of a core network, the data is data related to the service type or the function type, or data related to the plurality of UEs in the radio access network, and sending a first connection establishment request response message related to the first data transmission bearer so as to establish the first data transmission bearer between the first network node of the Radio Access Network (RAN) and the second network node of the core network.

Inventors

ZHANG YINCHENG
TANG XIAOYONG
QU MIAO

Assignees

深圳TCL新技术有限公司

Dates

Publication Date: 20260512
Application Date: 20240115
Priority Date: 20231204

Claims (20)

A data transmission method performed in a first network node of a radio access network RAN, comprising: Receiving a first connection establishment request message related to a first data transmission bearer for establishing the first data transmission bearer, wherein the first connection establishment request message comprises identification information of a service type or a function type associated with a non-User Equipment (UE), or identification information of a plurality of UEs, the first data transmission bearer is used for transmitting data between the first network node and a second network node, the data is data related to the service type or the function type, or data related to the plurality of UEs in the radio access network, and A first connection establishment request response message associated with the first data transmission bearer is sent to establish the first data transmission bearer between a first network node and the second network node of the radio access network RAN.
The data transmission method according to claim 1, characterized in that the first network node is a base station or a base station distribution unit DU of the radio access network RAN; The second network node is a user plane function UPF of the core network, a base station of the radio access network RAN, or a base station concentration unit CU of the radio access network RAN.
The data transmission method according to claim 1, wherein the first data transmission bearer is a user plane transmission bearer and is a transport bearer based on a general packet radio service tunneling protocol-user plane GTP-U protocol.
The data transmission method according to claim 1, wherein the first connection establishment request message further includes at least one of the following information: the identification or address information of the first network node; Identification or address information of a second network node of the core network or radio access network; Endpoint information of the second network node of the transport bearer related to the first data transport bearer, and The first data transmission carries the related data rate and QoS requirement information.
The data transmission method according to claim 1, wherein the first connection establishment request response message includes at least one of the following information: the identification or address information of the first network node; The identity or address information of the second network node, and Endpoint information of the first network node of the transport bearer related to the first data transport bearer.
A data transmission method, implemented in a data transmission system, comprising: The method comprises the steps that a third network node sends a first connection establishment request message related to a first data transmission bearer to a first network node so as to establish the first data transmission bearer between the first network node and a second network node, wherein the first connection establishment request message comprises identification information of a service type or a function type related to non-UE or identification information of a plurality of UEs; The third network node sends a second connection establishment request message related to the first data transmission bearer, a second data transmission bearer, and/or a third data transmission bearer to a fourth network node, wherein the second data transmission bearer is used for representing a bearer between the second network node and a fifth network node, the third data transmission bearer is used for representing a bearer between the second network node and a sixth network node, and the first data transmission bearer, the second data transmission bearer, and the third data transmission bearer are all used for transmitting data related to a traffic type or a function type associated with the non-UE or data of the plurality of UEs; The fourth network node sending a third connection establishment request message related to the first data transmission bearer to the third network node, and The fourth network node sends a fourth connection establishment request message related to the first data transmission bearer, the second data transmission bearer, and/or the third data transmission bearer to the second network node to establish the first data transmission bearer, the second data transmission bearer, and/or the third data transmission bearer.
The data transmission method according to claim 6, further comprising: The fourth network node sends a fifth connection establishment request message related to the second data transmission bearer to the fifth network node to establish the second data transmission bearer.
The data transmission method according to claim 7, further comprising: the first network node sends a first connection establishment response message to the third network node; The fourth network node sends a second connection establishment response message related to the first data transmission bearer, the second data transmission bearer, and/or the third data transmission bearer to the third network node; The third network node sends a third connection establishment response message related to the first data transmission bearer to the fourth network node; The second network node sending a fourth connection setup response message related to the first data transmission bearer, the second data transmission bearer, and/or the third data transmission bearer to the fourth network node, and The fifth network node sends a fifth connection setup response message related to the second data transmission bearer to the fourth network node.
The data transmission method according to claim 6, further comprising: The fourth network node sends a fourth connection establishment complete message related to the first data transmission bearer, the second data transmission bearer, and/or the third data transmission bearer to the second network node to complete establishment of the first data transmission bearer, the second data transmission bearer, and/or the third data transmission bearer.
The data transmission method according to claim 6, characterized in that the first network node is a base station of the radio access network RAN; The second network node is a user plane function UPF; The third network node is an access and mobility management function AMF; the fourth network node is a session management function SMF; the fifth network node is a core network service management function CNSMF, and/or The sixth network node is a network node of a data network DN.
The data transmission method of claim 6, further comprising the third network node receiving a service setup request message associated with the first data transmission bearer, the second data transmission bearer, and/or the third data transmission bearer from the first network node or the fifth network node, wherein the service setup request message includes identification information of the service type or the function type, or identification information of the plurality of UEs.
The data transmission method according to claim 7, wherein the second connection establishment request message, the third connection establishment request message, the fourth connection establishment request message, the fifth connection establishment request message include identification information of the service type or function type, or identification information of the plurality of UEs.
The method of claim 6, wherein the first data transport bearer is a user plane transport bearer, and wherein the user plane transport bearer is a transport bearer based on a general packet radio service tunneling protocol-user plane GTP-U protocol.
The data transmission method of claim 6, wherein the second data transmission bearer is a user plane transmission bearer, wherein the user plane transmission bearer is a GTP-U protocol based transmission bearer, a TCP protocol based transmission bearer, or an HTTP protocol based transmission bearer.
The data transmission method according to claim 6, wherein the third data transmission bearer is a user plane transmission bearer, wherein the user plane transmission bearer is a transmission bearer based on GTP-U protocol, a transmission bearer based on TCP protocol, a transmission bearer based on user data packet protocol UDP protocol, or a transmission bearer based on hypertext transfer security protocol HTTP protocol.
The data transmission method according to claim 10, characterized in that the second connection establishment request message comprises at least one of identification or address information related to a network node of the radio access network RAN, identification or address information related to the access and mobility management function AMF, identification or address information related to the session management function SMF, identification or address information related to the CNSMF network node, identification or address information related to the user plane function UPF, identification or address information related to the data network DN, traffic related information of the first, second and/or third data transmission bearers; The third connection establishment request message comprises at least one of identification or address information related to a network node of the radio access network RAN, identification or address information related to the access and mobility management function AMF, identification or address information of the session management function SMF, identification or address information of the UPF, endpoint information of the UPF and/or information related to a service carried by the first data transmission; The fourth connection establishment request message includes at least one of identification or address information related to a network node of the radio access network RAN, identification or address information related to the core network service management function CNSMF, identification or address information related to the access and mobility management function AMF, identification or address information related to the session management function SMF, identification or address information related to the UPF, identification or address information related to the data network DN, endpoint information of a base station of the first data transmission bearer, endpoint information of CNSMF of the second data transmission bearer, endpoint information of a DN of the third data transmission bearer and/or information related to traffic of the data transmission bearer; The first connection establishment request message comprises at least one of identification or address information related to a network node of the radio access network RAN, identification or address information related to the access and mobility management function AMF, identification or address information of the session management function SMF, identification or address information of the user plane function UPF, endpoint information of the UPF and/or information related to traffic of the first data transmission bearer, and The fifth connection establishment request message comprises at least one of identification or address information related to a network node of the radio access network RAN, identification or address information related to the access and mobility management function AMF, identification or address information of UPF, identification or address information of the session management function SMF, identification or address information of the core network service management function CNSMF, endpoint information of the UPF of the second data transport bearer and/or information related to a service of the data transport bearer.
The data transmission method of claim 16, wherein the information related to the traffic carried by the data transmission includes at least one of traffic type or function type, traffic data rate, and traffic quality of service, qoS.
The data transmission method according to claim 8, wherein the second connection setup response message comprises at least one of identification or address information related to a network node of the radio access network RAN, identification or address information related to the access and mobility management function AMF, identification or address information of the session management function SMF, identification or address information of the UPF, endpoint information of the UPF of the first data transmission bearer and/or information related to traffic of the data transmission bearer; the third connection establishment response message at least comprises endpoint information of the base station of the first data transmission bearer; The fourth connection establishment response message at least comprises endpoint information of the UPF of the first data transmission bearing, endpoint information of the UPF of the second data transmission bearing and/or endpoint information of the UPF of the third data transmission bearing; The first connection establishment response message at least comprises endpoint information of the base station of the first data transmission bearer and/or The fifth connection setup response message includes at least endpoint information of CNSMF of the second data transport bearer.
The method according to claim 9, wherein the fourth connection establishment completion message comprises at least endpoint information of the base station of the first data transmission bearer, endpoint information of CNSMF of the second data transmission bearer, and/or endpoint information of the DN of the third data transmission bearer.
The data transmission method according to claim 6, further comprising, in a downlink direction: Data radio bearers DRB in which data related to at least two UEs are mapped by the RAN to Uu interfaces of the at least two UEs, and Transmitting data related to at least two UEs through the data radio bearer DRB, wherein the data related to at least two UEs is transmitted through the first data transmission bearer, and/or In the uplink direction, the first network node selects one UE of at least two UEs, maps the data radio bearer and data of the Uu interface of the selected UE to the first data transmission bearer, and transmits the data of the selected UE through the first data transmission bearer.

Description

Data transmission method Technical Field The present application relates to the field of wireless communications technologies, and in particular, to a data transmission method. Background Since 3G, mobile communication networks based on the third generation partnership project (Third Generation Partnership Project,3 GPP) standard have undergone third generation mobile communication, which is dominant from wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), to fourth generation mobile communication, which is dominant by long term evolution (Long Term Evolution, LTE), and to fifth generation mobile communication system architecture, which is currently characterized by a New air interface (NR). These systems are mainly divided into two parts, namely a radio access network (Radio Access Network, RAN) and a core network CN, however, the standard interfaces between the RAN and the CN are not the same, which reveals the evolving nature of mobile communication technologies. Fig. 1 is a diagram of a 5G mobile communication system architecture model, which mainly includes a User Equipment (UE), a radio access network RAN, and a core network (5G Core network,5GC). The access and mobility management functions (ACCESS AND mobility management function, AMF) and the user plane functions (user plane function, UPF) are two network nodes in the 5G core network 5GC, the RAN and the AMF being connected by an N2 interface, and the RAN and the UPF being connected by an N3 interface. Since the base station gNB is an important logical network node in the RAN, and is also an interface node for the RAN to connect with the AMF and the UPF 30d, the N2 and N3 interfaces are also interfaces between the gNB and the AMF and the UPF 30d, respectively. While the N2 and N3 interfaces are also collectively referred to as NG interfaces, i.e., interfaces between RAN and 5 GC. The NG interface is functionally divided into a control plane interface (NG-C) and a user plane interface (NG-U), corresponding to the N2 and N3 interfaces, respectively. The protocol stacks of NG-C are shown in fig. 2 below, where the data link Layer (DATA LINK LAYER) of the Transport Layer (Transport Layer), the physical Layer (PHYSICAL LAYER), the internet protocol (Internet Protocol, IP) and the stream control transmission protocol (Stream Control Transmission Protocol, SCTP) protocols are all based on the prior art, while the NG application protocol (NG Application Protocol, NGAP) of the application Layer (Application Layer) is the main protocol embodying NG-C capabilities. The main capabilities (capabilities) offered by NGAP are: 1. A procedure for setting up, maintaining and releasing a protocol Data unit (Protocol Data Unit, PDU) Session (Session), wherein the PDU Session is used for defining a connection for providing a PDU connection service between a UE and a Data Network (DN) and for associating all information and resources related to the PDU connection (including transmission) service; 2. performing a procedure of handover between the same radio access technology (Radio Access Technology, RAT) and different RATs; 3. distinguishing each UE specific signaling management at a protocol level; 4. Transmitting a Non-access stratum signaling NAS (Non-ACCESS SIGNALLING) message between the UE and the AMF; 5.A packet flow related resource reservation mechanism. In particular, the capability provided by NGAP also includes the transmission of some special service data, such as a transparent transmission new air interface positioning protocol a (NR Positioning Protocol A, NRPPa, defined in 3gpp TS 38.455) message, some of which include positioning service related data. The protocol stack of NG-U is shown in fig. 3 below. The physical layer (PHYSICAL LAYER), the data link layer (DATA LINK LAYER), the IP, the user datagram protocol (User Datagram Protocol, UDP) and the General Packet Radio Service (GPRS) tunneling protocol-user plane (GTP-U) protocols are all based on the prior art. The user plane PDU (PDU Session User Plane Protocol) of a PDU Session is a proprietary protocol associated with the PDU Session that provides control cells (control information element) for the user plane PDU, such as a QoS flow identifier (QoS flow identifier, QFI) and a reflective QoS indicator (REFLECTIVE QOS INDICATOR, RQI). The NG-U primary function is to support non-guaranteed transmission of PDU Session user plane PDUs between the RAN and the UPF 30d (non guaranteed delivery). Fig. 4 is a user plane protocol stack of a PDU Session of the 5G mobile communication system, which is related to PDU transmission of the PDU Session user plane between the UE and DN, and is related to UE traffic. The NG-U, i.e., the portion of the N3 corresponding user plane on the NG interface, is part of the PDU transmission of the PDU Session user plane between the UE and DN. The NG-U is therefore typically UE traffic related. The PDU Session user plane further comprises a 5G