Data transmission method and device, communication equipment and storage medium

Abstract

The invention relates to a data transmission method and device, communication equipment and a storage medium, and relates to the technical field of mobile communication. The method comprises the following steps: when a target data stream does not meet a target parameter, RAN / AN equipment sends target indication information to target equipment; wherein the target data stream is a quality of service (QoS) stream which ensures a bit rate (GBR); the target indication information is used for notifying the target device that the target data stream does not meet the target parameter, so that the target device starts a redundant transmission mechanism of the target data stream. By adopting the method, the RAN / AN equipment can send the indication information to the target equipment through a user plane to inform the target equipment that the target data flow does not meet the target parameter, namely, the QoS flow of the GBR data flow is not met, so that the target equipment can select whether a redundant transmission mechanism of the target data flow needs to be started or not.

Description

Technical Field

[0001] The present application relates to the field of mobile communication technology, and in particular to a data transmission method, apparatus, communication equipment and storage medium. Background Art

[0002] GBR (Guaranteed Bit Rate) data streams and Non-GBR data streams can be transmitted simultaneously on 3GPP (3rd Generation Partnership Project) and non-3GPP access technology paths to ensure the transmission quality of data streams. The current standard defines that for Non-GBR data streams, performance measurements of data streams can be performed through PMF (Performance Measurement Function) network elements between UE (User Equipment) and UPF (the User Plane Function) network elements, thereby obtaining measurement parameters such as PLR (Packet Loss Rate) and / or RTT (Round Trip Time) to start the redundant transmission mechanism of Non-GBR data streams.

[0003] However, the measurement parameters obtained by the above-mentioned PMF network element are not currently applicable to the GBR data stream. Therefore, how to start the redundant transmission mechanism of the GBR data stream is a problem that needs to be solved. Summary of the invention

[0004] Based on this, it is necessary to provide a data transmission method, apparatus, communication equipment and storage medium that can trigger and start a redundant transmission mechanism for GBR data streams in response to the above technical problems.

[0005] In a first aspect, the present application provides a data transmission method, which is applied to an access network RAN / AN device, including:

[0006] When the target data stream does not meet the target parameters, target indication information is sent to the target device; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data stream.

[0007] In one of the embodiments, the target device is a user plane function UPF network element and / or a user equipment UE.

[0008] In one embodiment, sending target indication information to a target device includes:

[0009] Send a first indication message to the UPF network element; wherein the first indication message is used to notify the UPF network element that the target data flow does not meet the target parameters, so that the UPF network element can start a redundant transmission mechanism for the target data flow.

[0010] In one embodiment, sending target indication information to a target device includes:

[0011] Sending second indication information to the UE; wherein the second indication information is used to notify the UE that the target data flow does not meet the target parameters, so that the UE can start a redundant transmission mechanism for the target data flow.

[0012] In one of the embodiments, before sending the first indication information to the UPF network element, the method further includes:

[0013] Receiving first address information sent by the UPF network element;

[0014] Sending first indication information to the UPF network element includes:

[0015] The first indication information is sent to the UPF network element through the first address information.

[0016] In one of the embodiments, before sending the second indication information to the UE, the method further includes:

[0017] receiving second address information sent by the UE;

[0018] Sending second indication information to the UE includes:

[0019] The second indication information is sent to the UE through the second address information.

[0020] In one of the embodiments, before receiving the second address information sent by the UE, the method further includes:

[0021] Sending third address information to the UE;

[0022] Receiving second address information sent by the UE, including:

[0023] The second address information sent by the UE through the third address information is received.

[0024] In one of the embodiments, the target parameter includes a guaranteed flow bit rate GFBR.

[0025] In one embodiment, the method further comprises:

[0026] Sending data stream identification information to a target device; wherein the data stream identification information is used to identify a target data stream.

[0027] In a second aspect, the present application provides a data transmission method, applied to a UPF network element, including:

[0028] receiving first indication information sent by a RAN / AN device; wherein the first indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR;

[0029] According to the first indication information, a redundant transmission mechanism of the target data stream is started.

[0030] In one embodiment, the method further comprises:

[0031] According to the first indication information, third indication information is sent to the UE; wherein the third indication information is used to notify the UE that the target data flow does not meet the target parameters, so that the UE can start a redundant transmission mechanism for the target data flow.

[0032] In one of the embodiments, sending third indication information to the UE according to the first indication information includes:

[0033] After receiving the first indication information, sending third indication information to the UE; or,

[0034] After receiving the first indication information and starting the redundant transmission mechanism of the target data flow according to the first indication information, third indication information is sent to the UE.

[0035] In one embodiment, the method further comprises:

[0036] Send data flow identification information to the UE; wherein the data flow identification information is used to identify the target data flow.

[0037] In one of the embodiments, before receiving the first indication information sent by the RAN / AN device, the method further includes:

[0038] Sending first address information to the RAN / AN device;

[0039] Receiving first indication information sent by a RAN / AN device, including:

[0040] Receive first indication information sent by the RAN / AN device through first address information.

[0041] In one of the embodiments, sending first address information to a RAN / AN device includes:

[0042] The first address information is sent to the RAN / AN device through the session management function SMF network element and the access and mobility session management function AMF network element.

[0043] In one of the embodiments, sending the first address information to the RAN / AN device through a session management function SMF network element and an access and mobility session management function AMF network element includes:

[0044] Send an N4 session response message carrying the first address information to the SMF network element; the N4 session response message is used to instruct the SMF network element to send an N1N2 transmission message carrying the first address information to the AMF network element; the N1N2 transmission message is used to instruct the AMF network element to send a PDU session request message carrying the first address information to the RAN / AN device.

[0045] In one embodiment, the target parameter includes GFBR.

[0046] In a third aspect, the present application provides a data transmission method, applied to a UE, including:

[0047] receiving second indication information sent by the RAN / AN device; wherein the second indication information is used to indicate that the target data flow does not meet the target parameter, and the target data flow is a QoS flow of GBR;

[0048] According to the second indication information, a redundant transmission mechanism of the target data stream is started.

[0049] In one embodiment, the method further comprises:

[0050] receiving third indication information sent by the UPF network element; wherein the third indication information is used to notify the UE that the target data flow does not meet the target parameter; the third indication information is sent by the UPF network element after receiving the first indication information sent by the RAN / AN device;

[0051] According to the third indication information, a redundant transmission mechanism of the target data stream is started.

[0052] In one of the embodiments, the third indication information is sent after the UPF network element receives the first indication information, or the UPF network element receives the first indication information and sends it after starting the redundant transmission mechanism of the target data flow according to the first indication information.

[0053] In one embodiment, the method further comprises:

[0054] Receive data flow identification information sent by RAN / AN equipment and / or UPF network element; wherein the data flow identification information is used to identify the target data flow.

[0055] In one of the embodiments, before receiving the second indication information sent by the RAN / AN device, the method further includes:

[0056] Sending second address information to the RAN / AN device;

[0057] Receiving second indication information sent by the RAN / AN device, including:

[0058] The second indication information sent by the RAN / AN device through the second address information is received.

[0059] In one of the embodiments, before sending the second address information to the RAN / AN device, the method further includes:

[0060] receiving third address information sent by the RAN / AN device;

[0061] Sending the second address information to the RAN / AN device includes:

[0062] The second address information is sent to the RAN / AN device through the third address information.

[0063] In one embodiment, the target parameter includes GFBR.

[0064] In a fourth aspect, the present application further provides a data transmission device, the device comprising:

[0065] A sending module is used to send target indication information to a target device when a target data stream does not meet target parameters; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data stream.

[0066] In a fifth aspect, the present application also provides another data transmission device, the device comprising:

[0067] A receiving module, configured to receive first indication information sent by a RAN / AN device; wherein the first indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR;

[0068] The starting module is used to start the redundant transmission mechanism of the target data stream according to the first indication information.

[0069] In a sixth aspect, the present application further provides another data transmission device, the device comprising:

[0070] A receiving module, configured to receive second indication information sent by a RAN / AN device; wherein the second indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR;

[0071] The starting module is used to start the redundant transmission mechanism of the target data stream according to the second indication information.

[0072] In a seventh aspect, the present application further provides a communication device, comprising: a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program;

[0073] A transmitter is used to send target indication information to a target device when a target data stream does not meet target parameters; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data stream.

[0074] In an eighth aspect, the present application further provides another communication device, comprising: a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program;

[0075] A receiver, configured to receive first indication information sent by a RAN / AN device; wherein the first indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR;

[0076] The processor executes a computer program to start a redundant transmission mechanism of the target data stream according to the first indication information.

[0077] In a ninth aspect, the present application further provides another communication device, comprising: a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program;

[0078] A receiver, configured to receive second indication information sent by a RAN / AN device; wherein the second indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR;

[0079] The processor executes a computer program to start a redundant transmission mechanism of the target data stream according to the second indication information.

[0080] In a tenth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the data transmission method of any one of the first to third aspects.

[0081] In an eleventh aspect, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the data transmission method of any one of the first to third aspects above.

[0082] In the above-mentioned data transmission method, apparatus, communication device and storage medium, when the target data stream does not meet the target parameters, the RAN / AN device sends target indication information to the target device; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start the redundant transmission mechanism of the target data stream. In the present application, the RAN / AN device sends indication information to the target device through the user to notify the target device that the target data stream does not meet the target parameters, that is, the QoS flow of the GBR data stream does not meet the target parameters, so that the target device can choose whether to start the redundant transmission mechanism of the target data stream. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] Figure 1 An application scenario diagram of a data transmission method in an embodiment;

[0084] Figure 2 A schematic diagram of a flow chart of a data transmission method in an embodiment;

[0085] Figure 3 A schematic diagram of a process of sending first indication information in an embodiment;

[0086] Figure 4 A schematic diagram of a process of sending second indication information in an embodiment;

[0087] Figure 5 A schematic diagram of a flow chart of a data transmission method in another embodiment;

[0088] Figure 6 A schematic diagram of a process of receiving first indication information in an embodiment;

[0089] Figure 7 A schematic diagram of a flow chart of a data transmission method in yet another embodiment;

[0090] Figure 8 A schematic diagram of a process of receiving second indication information in an embodiment;

[0091] Fig. 9 A schematic diagram of a flow chart of a data transmission method in yet another embodiment;

[0092] Fig.10 is a structural block diagram of a data transmission device in one embodiment;

[0093] Fig.11 is a structural block diagram of a data transmission device in another embodiment;

[0094] Fig.12 FIG. 4 is a structural block diagram of a data transmission device in yet another embodiment. DETAILED DESCRIPTION

[0095] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0096] The data transmission method provided in the embodiment of the present application can be applied to Figure 1 In the application scenario shown. ATSSS (Access Traffic Steering, Switching, Splitting) rules support multi-connection PDU (Protocol Data Unit) session services. The multi-connection PDU session service is implemented by establishing a multi-connection PDU session, that is, a PDU session can have user plane resources on two access networks. It can be understood that the user equipment UE can establish a multi-connection PDU session with the data network DN through a 3GPP access network and a non-3GPP access network at the same time. Among them, the UPF network element acts as a PSA (PDU session anchor) to exchange packet data units between the UE and the DN. The multi-connection PDU session service can simultaneously use two independent N3 / N9 tunnels between the PSA and the RAN / AN equipment.

[0097] Furthermore, after the multi-connection PDU session is established, the UE can decide how to allocate uplink traffic between the 3GPP access network and the non-3GPP access network based on the ATSSS rules, and the UPF network element can decide how to allocate downlink traffic between the N3 / N9 tunnels and the 3GPP access network and the non-3GPP access network based on the N4 rules.

[0098] On this basis, both GBR data streams and Non-GBR data streams can be transmitted simultaneously on the 3GPP access network and the non-3GPP access network to ensure the transmission quality of the data streams.

[0099] Specifically, the PMF (Performance Measurement Function) network element of the UE and UPF can measure the access performance of the Non-GBR data flow, obtain measurement parameters such as PLR and / or RTT, and trigger the start of redundant transmission of the Non-GBR data flow when the measurement parameters do not meet the transmission quality. For example, the PLR ​​parameter of the Non-GBR QoS flow is high. In order to ensure the transmission quality of the Non-GBR QoS flow, it is necessary to start the redundant transmission of the Non-GBR data flow.

[0100] However, the Active-Standby mode applicable to the GBR data stream does not support the use of the above measurement parameters, so the above measurement parameters cannot be applied to the GBR data stream at present. For the GBR data stream, there is currently a lack of a mechanism for starting redundant transmission.

[0101] In one embodiment, Figure 2 As shown, a data transmission method is provided, which is applied to a RAN / AN device, and includes the following steps:

[0102] S201, when the target data flow does not meet the target parameters, send target indication information to the target device.

[0103] The target device is a user plane function UPF network element and / or a user equipment UE. The RAN / AN device can transmit the target indication information to the target device, ie, the UPF network element and / or the UE, through a user plane data packet.

[0104] Among them, the target indication information is used to notify the target device that the target data flow does not meet the target parameters, so that the target device can start the redundant transmission mechanism of the target data flow. The target indication information may include first indication information and / or second indication information. For example, the RAN / AN device sends the first indication information to the UPF network element and sends the second indication information to the UE respectively. The first indication information is used to notify the UPF network element that the target data flow does not meet the target parameters, so that the UPF network element can start the redundant transmission mechanism of the target data flow; the second indication information is used to notify the UE that the target data flow does not meet the target parameters, so that the UE can start the redundant transmission mechanism of the target data flow.

[0105] In this embodiment, the target data flow is a QoS flow with a guaranteed bit rate GBR. QoS (Quality of Service) is implemented at the QoS flow level and is used to measure the quality of network services. QoS metrics, i.e., factors that affect network quality, may include transmission rate, bandwidth of transmission link, message transmission delay and jitter, and packet loss rate.

[0106] The target parameters include a guaranteed flow bit rate GFBR, where GFBR (Guaranteed Flow Bit Rate) represents the bit rate guaranteed by the network to be provided to the QoS flow over an average time window.

[0107] When the target data flow, that is, the QoS flow of the current GBR, does not meet the GFBR, the RAN / AN device sends a first indication message to the UPF network element and a second indication message to the UE respectively, thereby notifying the UPF network element and the UE that the QoS flow of the GBR does not meet the GFBR, so that the UPF network element and the UE can choose whether to start the redundant transmission mechanism of the QoS flow of the GBR.

[0108] It should be noted that the UE is responsible for starting the redundant transmission mechanism of the QoS flow of the uplink GBR, and the UPF network element is responsible for starting the redundant transmission mechanism of the QoS flow of the downlink GBR.

[0109] In an optional embodiment, data flow identification information can be sent to the target device, namely the UPF network element and the UE, and the target data flow that does not meet the target parameters can be identified by the data flow identification information; the data flow identification information includes QFI (QoS Flow ID, QoS flow identifier). It can be understood that a PDU session may contain multiple GBR QoS flows, and the packet data packets corresponding to each GBR QoS flow are classified and marked using QFI. The data flow identification information and the target indication information are sent to the UPF network element and the UE, so that the UPF network element and the UE can identify the target data flow that needs to start redundant transmission.

[0110] The first indication information, the second indication information and the data flow identification information may all be transmitted in the form of data packets.

[0111] In the above scheme, when the target data flow does not meet the target parameters, the RAN / AN device sends target indication information to the target device; wherein the target data flow is a quality of service QoS flow that guarantees the bit rate GBR; the target indication information is used to notify the target device that the target data flow does not meet the target parameters, so that the target device can start the redundant transmission mechanism of the target data flow. The RAN / AN device sends the indication information that the target data flow does not meet the target parameters to the target device through the user, that is, informs the target device of the information that the QoS of the GBR data flow is not met, so that the target device can choose whether to start the redundant transmission mechanism of the GBR data flow based on the indication information.

[0112] In order to successfully send the first indication information to the UPF network element, based on the above embodiment, in one embodiment, the first address information sent by the UPF network element may be received first. Figure 3 As shown, the following steps may be specifically included:

[0113] S301, receiving the first address information sent by the UPF network element.

[0114] The first address information may be allocated by a UPF network element, and may specifically be a UDP (User Datagram Protocol) port number or a MAC address (Media Access Control Address).

[0115] The RAN / AN device may receive the first address information during the process of establishing a multi-connection PDU session. For example, the RAN / AN device receives the first address information sent by the UPF network element through the SMF (Session Management Function) network element and the AMF (Access and Mobility Management Function) network element.

[0116] Specifically, the UE sends a PDU session establishment request to the AMF network element, and then the AMF network element sends a PDU session establishment context request to the SMF network element, so that the SMF sends an N4 session establishment / modification request to the UPF. Furthermore, the UPF can carry the first address information in the N4 session establishment / modification response and send it to the SMF network element, and the SMF network element carries the first address information in the N1N2 transmission message, such as the N2 information, and sends it to the AMF network element, so that the AMF network element can carry the first address information in the N2 PDU session request and send it to the RAN / AN device. On this basis, the establishment process of the multi-connection PDU session continues.

[0117] S302, sending first indication information to the UPF network element through the first address information.

[0118] When the target data flow does not meet the target parameters, the RAN / AN device sends the first indication information to the UPF network element through the first address information, so that the UPF network element can start the redundant transmission mechanism of the target data flow.

[0119] In this embodiment, before the RAN / AN device sends the first indication information to the UPF network element, it first receives the first address information sent by the UPF network element. Therefore, when the target data flow does not meet the target parameters, the first indication information can be sent to the UPF network element through the first address indicated by the first address information, thereby ensuring the reliability of data transmission between the RAN / AN device and the UPF network element.

[0120] In order to successfully send the second indication information to the UE, based on the above embodiment, in one embodiment, the second address information sent by the UE may be received first. Figure 4 As shown, the following steps may be specifically included:

[0121] S401: Send third address information to UE.

[0122] After the RAN / AN device receives the N2 PDU session request carrying the first address information sent by the AMF network element, it continues to execute the multi-connection PDU session establishment process. Specifically, the RAN / AN device can send the third address information to the UE during the AN-specific resource establishment process between the UE and the UE, so that the UE can send a message to the RAN / AN device through the third address information.

[0123] S402: Receive second address information sent by the UE via third address information.

[0124] The RAN / AN device receives a message sent by the UE through the third address information, such as the second address information. The second address information is used to instruct the RAN / AN device to send a message to the UE through the second address when the target data flow does not meet the target parameters.

[0125] S403: Send second indication information to the UE via the second address information.

[0126] When the target data flow does not meet the target parameters, the RAN / AN device sends the second indication information to the UE through the second address information, so that the UE can start the redundant transmission mechanism of the target data flow.

[0127] The second address information and the third address information may both be UDP port numbers or IP addresses (Internet Protocol Address).

[0128] In this embodiment, before the RAN / AN device sends the second indication information to the UE, it first receives the second address information sent by the UE, so that when the target data flow does not meet the target parameters, the second indication information can be sent to the UPF network element through the second address indicated by the second address information, thereby ensuring the reliability of data transmission between the RAN / AN device and the UE.

[0129] In one embodiment, Figure 5 As shown, a data transmission method is provided, which is applied to a UPF network element and includes the following steps:

[0130] S501: Receive first indication information sent by a RAN / AN device.

[0131] The UPF network element can receive first indication information sent by the RAN / AN device through a user plane data packet, wherein the first indication information is sent by the RAN / AN device when the target data flow does not meet the target parameters, and is used to indicate that the target data flow does not meet the target parameters.

[0132] Specifically, the target data flow is the QoS flow of GBR. QoS is implemented at the QoS flow level and is used to measure the quality of network services. QoS metrics, i.e., factors that affect network quality, include bit rate, bandwidth of transmission links, message transmission delay and jitter, and packet loss rate.

[0133] In this embodiment, the target parameter includes a guaranteed flow bit rate GFBR, where GFBR represents a bit rate guaranteed by the network to be provided to the QoS flow over an average time window.

[0134] When the target data flow, that is, the QoS flow of the current GBR, does not meet the GFBR, the RAN / AN device sends a first indication message to the UPF network element. Accordingly, the UPF network element receives the first indication message notifying that the QoS flow of the GBR does not meet the GFBR.

[0135] S502: Start a redundant transmission mechanism of a target data stream according to the first indication information.

[0136] The UPF network element determines that the target data flow does not meet the target parameters based on the first indication information, and then can choose whether to trigger the redundant transmission mechanism for starting the target data flow. For example, the UPF network element can determine the transmission quality of the target data flow based on the first indication information. If the transmission quality is lower than the preset threshold, it is determined that the target data flow needs to start redundant transmission to improve the transmission quality.

[0137] It should be noted that the first indication information is only used to notify the UPF network element that the target data flow does not meet the target parameters. Whether it is necessary to start the redundant transmission mechanism of the target data flow is controlled by the UPF network element.

[0138] In an optional embodiment, data flow identification information sent by a RAN / AN device may be received, the data flow identification information is used to identify a target data flow that does not meet the target parameters, and the data flow identification information includes a QFI. It is understandable that a PDU session may contain multiple GBR QoS flows, and each packet corresponding to a GBR QoS flow is classified and marked using a QFI. The UPF network element synchronously receives the data flow identification information and the first indication information, so that the target data flow for which redundant transmission needs to be initiated can be identified.

[0139] Both the first indication information and the data flow identification information can be transmitted in the form of data packets.

[0140] In the above scheme, the UPF network element receives the first indication information sent by the RAN / AN device when the target data flow does not meet the target parameters, and then starts the redundant transmission mechanism of the target data flow according to the first indication information; wherein the first indication information is used to indicate that the target data flow does not meet the target parameters, and the target data flow is a QoS flow of GBR. Through the first indication information sent by the RAN / AN device to the UPF network element, it is determined that the target data flow does not meet the target parameters, thereby triggering the start of the redundant transmission mechanism of the downlink target data flow.

[0141] As an optional implementation in this embodiment, in order to ensure that the UE side can successfully receive the indication information that the target data stream does not meet the target parameters, the UPF can redundantly send third indication information to the UE.

[0142] For example, according to the first indication information, the third indication information is sent to the UE. The UPF network element transmits the third indication information to the UE via a user plane data packet, wherein the third indication information is used to notify the UE that the target data flow does not meet the target parameters, so that the UE can start the redundant transmission mechanism of the target data flow.

[0143] Optionally, the UPF network element may also send data flow identification information to the UE, and use the data flow identification information to identify the target data flow that does not meet the target parameters.

[0144] Specifically, the UPF network element may send the third indication information to the UE after receiving the first indication information, or may send the third indication information to the UE after receiving the first indication information and starting the redundant transmission mechanism of the target data flow according to the first indication information.

[0145] In this way, sending the third indication information to the UE through the UPF network element ensures that the UE can choose whether to start the redundant transmission mechanism of the target data flow.

[0146] In order to successfully receive the first indication information, based on the above embodiment, in one embodiment, the allocated first address information may be sent to the RAN / AN device first. Figure 6 As shown, the following steps may be specifically included:

[0147] S601: Send first address information to a RAN / AN device.

[0148] The first address information may include a UDP (User Datagram Protocol) port number or a MAC address (Media Access Control Address).

[0149] Furthermore, the UPF network element may send first address information indicating the first address to the RAN / AN device during the process of establishing a multi-connection PDU session. For example, the first address information is sent to the RAN / AN device through the SMF network element and the AMF network element. Specifically, an N4 session response message carrying the first address information is sent to the SMF network element; the SMF network element sends an N1N2 transmission message carrying the first address information to the AMF network element based on the N4 session response message; the AMF network element sends a PDU session request message carrying the first address information to the RAN / AN device based on the N1N2 transmission message.

[0150] S602: Receive first indication information sent by a RAN / AN device through first address information.

[0151] Receive the first indication information sent by the RAN / AN device through the first address information when the target data flow does not meet the target parameters; wherein the first indication information is used for the UPF network element to select whether to start the redundant transmission mechanism of the target data flow.

[0152] Before receiving the first indication information sent by the RAN / AN device, this embodiment first sends the first address information to the RAN / AN, so that the RAN / AN device can send the first indication information to the UPF network element through the first address indicated by the first address information when the target data flow does not meet the target parameters, thereby ensuring the reliability of data transmission between the RAN / AN device and the UPF network element.

[0153] In one embodiment, Figure 7 As shown, a data transmission method is provided, which is applied to a UE and includes the following steps:

[0154] S701: Receive second indication information sent by a RAN / AN device.

[0155] The UE may receive second indication information sent by the RAN / AN device through a user plane data packet, wherein the second indication information is sent by the RAN / AN device when a target data flow does not meet target parameters.

[0156] Specifically, the target data flow is a QoS flow with a guaranteed bit rate (GBR). QoS is implemented at the QoS flow level and is used to measure the overall quality of network services. QoS metrics, i.e., factors that affect network quality, include transmission rate, bandwidth of transmission links, message transmission delay and jitter, and packet loss rate.

[0157] In this embodiment, the target parameter includes a guaranteed flow bit rate GFBR, where GFBR represents a bit rate guaranteed by the network to be provided to the QoS flow over an average time window.

[0158] When the target data flow, that is, the QoS flow of the current GBR, does not meet the GFBR, the RAN / AN device sends the second indication information to the UE. Accordingly, the UE receives the second indication information notifying that the QoS flow of the GBR does not meet the GFBR.

[0159] S702: Start a redundant transmission mechanism of the target data stream according to the second indication information.

[0160] Based on the second indication information, the UE can determine that the target data stream does not meet the target parameter, and then can choose whether to start the redundant transmission mechanism of the target data stream. For example, based on the second indication information, the UE can determine the transmission quality of the target data stream, and if the transmission quality is lower than a preset threshold, it is determined that the target data stream needs to start redundant transmission to improve the transmission quality.

[0161] In an optional embodiment, data flow identification information sent by a RAN / AN device may be received, the data flow identification information is used to identify a target data flow that does not meet a target parameter, and the data flow identification information includes a QFI. It is understandable that a PDU session may contain multiple GBR QoS flows, and each packet corresponding to a GBR QoS flow is classified and marked using a QFI. The UE receives the data flow identification information and the second indication information, so that it can identify the target data flow for which redundant transmission needs to be started.

[0162] Both the second indication information and the data flow identification information can be transmitted in the form of data packets.

[0163] In the above scheme, the UE receives the second indication information sent by the RAN / AN device when the target data flow does not meet the target parameters, and then starts the redundant transmission mechanism of the target data flow according to the second indication information; wherein the target data flow is a QoS flow of GBR. Through the second indication information sent by the RAN / AN device to the UE, it is determined that the target data flow does not meet the target parameters, thereby triggering the start of the redundant transmission mechanism of the uplink target data flow.

[0164] As an optional implementation method in this embodiment, a third indication information sent by the UPF network element can be received, and the redundant transmission mechanism of the target data flow can be started according to the third indication information.

[0165] For example, after receiving the first indication information sent by the RAN / AN device, the UPF network element transmits the third indication information to the UE through the user plane data packet, and accordingly, the UE receives the third indication information. The third indication information is used to notify the UE that the target data flow does not meet the target parameters.

[0166] Among them, the third indication information can be sent directly by the UPF network element after receiving the first indication information, or it can be sent by the UPF network element after receiving the first indication information and starting the redundant transmission mechanism of the target data flow according to the first indication information.

[0167] Optionally, the UE may also receive data flow identification information sent by the UPF network element, and determine the target data flow that does not meet the target parameters through the data flow identification information.

[0168] In this way, receiving the third indication information sent by the UPF network element ensures that the UE can choose whether to start the redundant transmission mechanism of the target data flow.

[0169] In order to successfully receive the second indication information, based on the above embodiment, in one embodiment, the allocated second address information may be first sent to the RAN / AN. Figure 8 As shown, the following steps may be specifically included:

[0170] S801: Receive third address information sent by a RAN / AN device.

[0171] The UE may receive the third address information during the process of establishing a multi-connection PDU session. For example, after the RAN / AN device receives the N2 PDU session request carrying the first address information sent by the AMF network element, it continues to execute the multi-connection PDU session establishment process, such as executing the AN-specific resource establishment process with the UE. On this basis, the UE receives the third address information sent synchronously during the AN-specific resource establishment process.

[0172] S802: Send the second address information to the RAN / AN device through the third address information.

[0173] According to the third address indicated by the third address information, a message such as the second address information is sent to the RAN / AN device. The second address information is used to instruct the RAN / AN device to send second indication information to the UE via the second address when the target data flow does not meet the target parameters.

[0174] S803: Receive second indication information sent by the RAN / AN device through second address information.

[0175] The second indication information sent by the RAN / AN device through the second address information is received when the target data flow does not meet the target parameters; wherein the second indication information is used for the UE to select whether to start the redundant transmission mechanism of the target data flow.

[0176] The second address information and the third address information may both be UDP port numbers or IP addresses (Internet Protocol Address).

[0177] In this embodiment, before the RAN / AN device sends the second indication information to the UE, the second address information is first sent to the RAN / AN device, so that the second indication information sent by the UPF network element through the second address indicated by the second address information can be received when the target data flow does not meet the target parameters, thereby ensuring the reliability of data transmission between the RAN / AN device and the UE.

[0178] In one embodiment, Fig. 9 As shown, an optional example of a data transmission method is provided. The specific process is as follows:

[0179] In the first step, the UE sends a PDU session establishment request to the AMF network element.

[0180] In the second step, the AMF network element sends a PDU session establishment context request to the SMF network element.

[0181] In the third step, the SMF network element sends a PDU session establishment context response to the AMF network element.

[0182] In the fourth step, the SMF network element sends an N4 session establishment / modification request to the UPF network element.

[0183] In the fifth step, the UPF network element sends an N4 session establishment / modification response carrying the first address information to the SMF network element.

[0184] In the sixth step, the SMF network element sends N2 information carrying the first address information to the AMF network element via N1N2 transmission.

[0185] In the seventh step, the AMF network element sends an N2 PDU session request carrying the first address information to the RAN / AN device.

[0186] In the eighth step, the UE and the RAN / AN device perform an AN-specific resource establishment process, and transmit the second address information and the third address information in the AN-specific resource establishment process.

[0187] In the ninth step, the RAN / AN device sends an N2 PDU session response to the AMF network element.

[0188] In the tenth step, the AMF network element sends a PDU session update context request to the SMF network element.

[0189] In the eleventh step, the SMF network element sends an N4 session modification request to the UPF network element.

[0190] In the twelfth step, the UPF network element sends an N4 session modification response to the SMF network element.

[0191] In the thirteenth step, the SMF network element sends a PDU session update context response to the AMF network element.

[0192] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0193] Based on the same inventive concept, the embodiment of the present application also provides a data transmission device for implementing the data transmission method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more data transmission device embodiments provided below can refer to the limitations on the data transmission method above, and will not be repeated here.

[0194] In one embodiment, Fig.10 As shown, a data transmission device 1 is provided, comprising: a receiving module 10, wherein:

[0195] The sending module 10 is used to send target indication information to the target device when the target data flow does not meet the target parameters.

[0196] The target data flow is a quality of service QoS flow with a guaranteed bit rate GBR; the target indication information is used to notify the target device that the target data flow does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data flow.

[0197] In one embodiment, the target device is a user plane function UPF network element and / or a user equipment UE.

[0198] In one embodiment, the sending module 10 is specifically used to send the first indication information to the UPF network element.

[0199] Among them, the first indication information is used to notify the UPF network element that the target data flow does not meet the target parameters, so that the UPF network element can start the redundant transmission mechanism of the target data flow.

[0200] In one embodiment, the sending module 10 is specifically configured to send the second indication information to the UE.

[0201] The second indication information is used to notify the UE that the target data flow does not meet the target parameters, so that the UE can start a redundant transmission mechanism for the target data flow.

[0202] In one embodiment, the data transmission device 1 may further include:

[0203] The first receiving module is used to receive the first address information sent by the UPF network element.

[0204] Correspondingly, the sending module 10 is specifically used to send the first indication information to the UPF network element through the first address information.

[0205] In one embodiment, the data transmission device 1 may further include:

[0206] The second receiving module is used to receive second address information sent by the UE.

[0207] Correspondingly, the sending module 10 is specifically configured to send the second indication information to the UE through the second address information.

[0208] In one embodiment, the data transmission device 1 may further include:

[0209] The address sending module is used to send third address information to the UE.

[0210] Correspondingly, the second receiving module is specifically configured to receive the second address information sent by the UE via the third address information.

[0211] In one embodiment, the target parameters include a guaranteed flow bit rate GFBR.

[0212] In one embodiment, the data transmission device 1 may further include:

[0213] The identification sending module is used to send data flow identification information to the target device.

[0214] The data flow identification information is used to identify the target data flow.

[0215] In one embodiment, Fig.11 As shown, a data transmission device 2 is provided, comprising: a receiving module 10 and a starting module 20, wherein:

[0216] The receiving module 10 is configured to receive first indication information sent by a RAN / AN device.

[0217] The first indication information is used to indicate that the target data flow does not meet the target parameters, and the target data flow is a QoS flow of GBR;

[0218] The starting module 20 is used to start the redundant transmission mechanism of the target data stream according to the first indication information.

[0219] In one embodiment, the data transmission device 2 may further include:

[0220] The first sending module is used to send third indication information to the UE according to the first indication information.

[0221] The third indication information is used to notify the UE that the target data flow does not meet the target parameters, so that the UE can start a redundant transmission mechanism for the target data flow.

[0222] In one embodiment, the sending module is specifically used to send third indication information to the UE after receiving the first indication information; or to send third indication information to the UE after receiving the first indication information and starting the redundant transmission mechanism of the target data stream according to the first indication information.

[0223] In one embodiment, the data transmission device 2 may further include:

[0224] The identification sending module is used to send data flow identification information to the UE.

[0225] The data flow identification information is used to identify the target data flow.

[0226] In one embodiment, the data transmission device 2 may further include:

[0227] The address sending module is used to send first address information to the RAN / AN device.

[0228] Correspondingly, the receiving module 10 is specifically configured to receive the first indication information sent by the RAN / AN device through the first address information.

[0229] In one embodiment, the address sending module is specifically used to send the first address information to the RAN / AN device through the session management function SMF network element and the access and mobility session management function AMF network element.

[0230] Specifically, an N4 session response message carrying the first address information is sent to the SMF network element; the N4 session response message is used to instruct the SMF network element to send an N1N2 transmission message carrying the first address information to the AMF network element; the N1N2 transmission message is used to instruct the AMF network element to send a PDU session request message carrying the first address information to the RAN / AN device.

[0231] In one embodiment, the target parameter includes GFBR.

[0232] In one embodiment, Fig.12 As shown, a data transmission device 3 is provided, comprising: a receiving module 10 and a starting module 20, wherein:

[0233] The receiving module 10 is configured to receive second indication information sent by the RAN / AN device.

[0234] The second indication information is used to indicate that the target data flow does not meet the target parameters, and the target data flow is a QoS flow of GBR.

[0235] The starting module 20 is used to start the redundant transmission mechanism of the target data stream according to the second indication information.

[0236] In one embodiment, the above-mentioned receiving module 10 can also be used to receive the third indication information sent by the UPF network element.

[0237] Among them, the third indication information is used to notify the UE that the target data flow does not meet the target parameters; the third indication information is sent by the UPF network element after receiving the first indication information sent by the RAN / AN device.

[0238] The startup module 20 may also be configured to start a redundant transmission mechanism of the target data stream according to the third indication information.

[0239] In one embodiment, the third indication information is sent after the UPF network element receives the first indication information, or the UPF network element receives the first indication information and sends it after starting the redundant transmission mechanism of the target data flow according to the first indication information.

[0240] In one embodiment, the data transmission device 3 may further include:

[0241] The identification receiving module is used to receive data flow identification information sent by the RAN / AN device and / or UPF network element.

[0242] The data flow identification information is used to identify the target data flow.

[0243] In one embodiment, the data transmission device 3 may further include:

[0244] The second sending module is used to send the second address information to the RAN / AN device.

[0245] Correspondingly, the receiving module 10 is specifically configured to receive the second indication information sent by the RAN / AN device through the second address information.

[0246] In one embodiment, the data transmission device 3 may further include:

[0247] The third address receiving module is used to receive the third address information sent by the RAN / AN device.

[0248] Correspondingly, the second sending module is specifically configured to send the second address information to the RAN / AN device through the third address information.

[0249] In one embodiment, the target parameter includes GFBR.

[0250] Each module in the above data transmission device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0251] In one embodiment, a communication device is provided, which includes a transmitter, a receiver, a processor and a memory, and the memory stores a computer program. The processor of the communication device is used to provide computing and control capabilities, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program. The memory of the communication device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the communication device is used to communicate with an external terminal through a network connection.

[0252] In one embodiment, a communication device is provided, including a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program; the transmitter is used to send target indication information to a target device when a target data stream does not meet target parameters; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data stream.

[0253] In one embodiment, a communication device is provided, including a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program; the receiver is used to receive first indication information sent by a RAN / AN device; wherein the first indication information is used to indicate that a target data flow does not meet target parameters, and the target data flow is a QoS flow of GBR; the processor executes the computer program to start a redundant transmission mechanism of the target data flow according to the first indication information.

[0254] In one embodiment, a communication device is provided, including a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program; the receiver is used to receive second indication information sent by a RAN / AN device; wherein the second indication information is used to indicate that a target data flow does not meet target parameters, and the target data flow is a QoS flow of GBR; the processor executes the computer program to start a redundant transmission mechanism of the target data flow according to the second indication information.

[0255] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned data transmission method are implemented.

[0256] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above data transmission method when executed by a processor.

[0257] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0258] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0259] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A data transmission method, applied to access network RAN / AN equipment, characterized in that: include: When the target data stream does not meet the target parameters, target indication information is sent to the target device; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data stream.

2. The method according to claim 1, characterized in that The target device is a user plane function UPF network element and / or a user equipment UE.

3. The method according to claim 2, characterized in that The sending target indication information to the target device includes: Send a first indication message to the UPF network element; wherein the first indication message is used to notify the UPF network element that the target data flow does not meet the target parameters, so that the UPF network element can start a redundant transmission mechanism for the target data flow.

4. The method according to claim 2, characterized in that: The sending target indication information to the target device includes: Sending second indication information to the UE; wherein the second indication information is used to notify the UE that the target data stream does not meet the target parameters, so that the UE can start a redundant transmission mechanism for the target data stream.

5. The method according to claim 3, characterized in that: Before sending the first indication information to the UPF network element, the method further includes: Receiving first address information sent by the UPF network element; The sending the first indication information to the UPF network element includes: The first indication information is sent to the UPF network element through the first address information.

6. The method according to claim 4, characterized in that Before sending the second indication information to the UE, the method further includes: receiving second address information sent by the UE; The sending the second indication information to the UE includes: The second indication information is sent to the UE through the second address information.

7. The method according to claim 6, characterized in that Before receiving the second address information sent by the UE, the method further includes: Sending third address information to the UE; The receiving the second address information sent by the UE includes: Receive the second address information sent by the UE through the third address information.

8. The method according to any one of claims 1 to 7, characterized in that The target parameters include a guaranteed flow bit rate GFBR.

9. The method according to any one of claims 1 to 7, characterized in that: The method further comprises: Sending data flow identification information to the target device; wherein the data flow identification information is used to identify the target data flow.

10. A data transmission method, applied to a UPF network element, characterized in that: include: receiving first indication information sent by a RAN / AN device; wherein the first indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR; According to the first indication information, a redundant transmission mechanism of the target data stream is started.

11. The method according to claim 10, characterized in that The method further comprises: According to the first indication information, third indication information is sent to the UE; wherein the third indication information is used to notify the UE that the target data flow does not meet the target parameters, so that the UE can start a redundant transmission mechanism for the target data flow.

12. The method according to claim 11, characterized in that The sending third indication information to the UE according to the first indication information includes: After receiving the first indication information, sending third indication information to the UE; or, After receiving the first indication information and starting the redundant transmission mechanism of the target data flow according to the first indication information, third indication information is sent to the UE.

13. The method according to any one of claims 11 to 12, characterized in that: The method further comprises: Sending data flow identification information to the UE; wherein the data flow identification information is used to identify the target data flow.

14. The method according to claim 10, characterized in that Before receiving the first indication information sent by the RAN / AN device, the method further includes: Sending first address information to the RAN / AN device; The receiving first indication information sent by the RAN / AN device includes: The first indication information sent by the RAN / AN device through the first address information is received.

15. The method according to claim 14, characterized in that The sending the first address information to the RAN / AN device includes: The first address information is sent to the RAN / AN device through the session management function SMF network element and the access and mobility session management function AMF network element.

16. The method according to claim 15, characterized in that The sending the first address information to the RAN / AN device through a session management function SMF network element and an access and mobility session management function AMF network element includes: Send an N4 session response message carrying the first address information to the SMF network element; the N4 session response message is used to instruct the SMF network element to send an N1N2 transmission message carrying the first address information to the AMF network element; the N1N2 transmission message is used to instruct the AMF network element to send a PDU session request message carrying the first address information to the RAN / AN device.

17. The method according to any one of claims 10 to 12, characterized in that: The target parameters include GFBR.

18. A data transmission method, applied to UE, characterized in that: include: receiving second indication information sent by a RAN / AN device; wherein the second indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR; According to the second indication information, a redundant transmission mechanism of the target data stream is started.

19. The method according to claim 18, characterized in that The method further comprises: receiving third indication information sent by a UPF network element; wherein the third indication information is used to notify the UE that the target data flow does not meet the target parameter; the third indication information is sent by the UPF network element after receiving the first indication information sent by the RAN / AN device; According to the third indication information, a redundant transmission mechanism of the target data stream is started.

20. The method according to claim 19, characterized in that The third indication information is sent after the UPF network element receives the first indication information, or the UPF network element receives the first indication information and sends it after starting the redundant transmission mechanism of the target data flow according to the first indication information.

21. The method according to any one of claims 18 to 20, characterized in that The method further comprises: Receive data flow identification information sent by the RAN / AN device and / or the UPF network element; wherein the data flow identification information is used to identify the target data flow.

22. The method according to claim 18, characterized in that Before receiving the second indication information sent by the RAN / AN device, the method further includes: Sending second address information to the RAN / AN device; The receiving second indication information sent by the RAN / AN device includes: Receive the second indication information sent by the RAN / AN device through the second address information.

23. The method according to claim 22, characterized in that Before sending the second address information to the RAN / AN device, the method further includes: receiving third address information sent by the RAN / AN device; The sending the second address information to the RAN / AN device includes: The second address information is sent to the RAN / AN device through the third address information.

24. The method according to any one of claims 18 to 20, characterized in that The target parameters include GFBR.

25. A data transmission device, characterized in that: include: A sending module is used to send target indication information to a target device when a target data stream does not meet target parameters; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data stream.

26. A data transmission device, characterized in that: include: A receiving module, configured to receive first indication information sent by a RAN / AN device; wherein the first indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR; A starting module is used to start the redundant transmission mechanism of the target data stream according to the first indication information.

27. A data transmission device, characterized in that: include: A receiving module, configured to receive second indication information sent by a RAN / AN device; wherein the second indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR; A starting module is used to start the redundant transmission mechanism of the target data stream according to the second indication information.

28. A communication device, characterized in that: include: a transmitter, a receiver, a processor and a memory, the memory storing a computer program; The transmitter is used to send target indication information to a target device when a target data stream does not meet target parameters; wherein the target data stream is a quality of service QoS stream that guarantees a bit rate GBR; and the target indication information is used to notify the target device that the target data stream does not meet the target parameters, so that the target device can start a redundant transmission mechanism for the target data stream.

29. A communication device, characterized in that: include: a transmitter, a receiver, a processor and a memory, the memory storing a computer program; The receiver is configured to receive first indication information sent by a RAN / AN device; wherein the first indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR; The processor executes the computer program to start a redundant transmission mechanism of the target data stream according to the first indication information.

30. A communication device, characterized in that: include: a transmitter, a receiver, a processor and a memory, the memory storing a computer program; The receiver is configured to receive second indication information sent by a RAN / AN device; wherein the second indication information is used to indicate that a target data flow does not meet a target parameter, and the target data flow is a QoS flow of a GBR; The processor executes the computer program to start a redundant transmission mechanism of the target data stream according to the second indication information.

31. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 24 are implemented.

32. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 24 are implemented.

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