WO2023184063A1

WO2023184063A1 - Data transmission method and apparatus, device, storage medium, and program product

Info

Publication number: WO2023184063A1
Application number: PCT/CN2022/083272
Authority: WO
Inventors: 郭雅莉; 郭伯仁
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2023-10-05
Also published as: CN118251941A

Abstract

The present application relates to the technical field of communications, and provides a data transmission method and apparatus, a device, a storage medium, and a program product. The method comprises: reading target protocol layer information of a first uplink data packet to be transmitted (510); determining first transmission time information according to the target protocol layer information of the first uplink data packet (520); and transmitting the first uplink data packet according to the first transmission time information (530). The technical solution provided by embodiments of the present application implements the synchronous transmission of a plurality of data packets.

Description

Data transmission methods, devices, equipment, storage media and program products

Technical field

The embodiments of the present application relate to the field of communication technology, and in particular to a data transmission method, device, equipment, storage medium and program product.

Background technique

In the field of communications, the transmission of certain business data streams has synchronization requirements. Further research is needed on how to achieve synchronization of data transmission.

Contents of the invention

Embodiments of the present application provide a data transmission method, device, equipment, storage medium and program product. The technical solutions are as follows:

According to one aspect of the embodiment of the present application, a data transmission method is provided, the method is executed by a terminal device, and the method includes:

Read the target protocol layer information of the first uplink data packet to be sent;

Determine first transmission time information according to the target protocol layer information of the first uplink data packet;

Send the first uplink data packet according to the first transmission time information.

According to one aspect of the embodiment of the present application, a data transmission method is provided. The method is executed by a first core network element. The method includes:

Receive the first downlink data packet from the data network;

Read the target protocol layer information of the first downlink data packet;

Determine second transmission time information according to the target protocol layer information of the first downlink data packet;

Send the first downlink data packet according to the second transmission time information.

According to one aspect of the embodiment of the present application, a wireless communication method is provided. The method is executed by a second core network element. The method includes:

Send configuration information to the terminal device and/or the first core network element, where the configuration information is used to indicate the service data flow enabling the transmission synchronization function.

According to an aspect of an embodiment of the present application, a communication device is provided. The communication device includes a processor and a memory. A computer program is stored in the memory. The processor executes the computer program to implement the above terminal device side. The data transmission method, or the data transmission method on the first core network element side, or the wireless communication method on the second core network element side.

According to one aspect of the embodiment of the present application, a computer-readable storage medium is provided. A computer program is stored in the computer-readable storage medium. The computer program is loaded and executed by a processor to implement the above-mentioned data on the terminal device side. The transmission method either implements the data transmission method on the first core network element side, or implements the wireless communication method on the second core network element side.

According to one aspect of the embodiment of the present application, a chip is provided. The chip includes programmable logic circuits and/or program instructions. When the chip is running, it is used to implement the above data transmission method on the terminal device side, or to implement The above-mentioned data transmission method on the first core network element side, or the above-mentioned wireless communication method on the second core network element side.

According to an aspect of an embodiment of the present application, a computer program product is provided. The computer program product includes computer instructions. The computer instructions are stored in a computer-readable storage medium. A processor reads the computer-readable storage medium from the computer-readable storage medium. Obtain and execute the computer instructions to implement the data transmission method on the terminal device side, or the data transmission method on the first core network element side, or the wireless communication method on the second core network element side.

The technical solutions provided by the embodiments of this application may include the following beneficial effects:

On the one hand, for the transmission of uplink service data, by determining the transmission time information corresponding to the data packet during the data transmission process, and sending the uplink data packet according to the transmission time information, the transmission time of the uplink data packet can be controlled, thereby achieving multiple Synchronous transmission of upstream data packets.

On the other hand, for the transmission of downlink service data, by determining the transmission time information corresponding to the data packet during the data transmission process, and sending the downlink data packet according to the transmission time information, the transmission time of the downlink data packet can be controlled, thereby achieving Synchronous transmission of multiple downstream data packets.

On the other hand, the second core network element sends configuration information to the terminal device and/or the first core network element, instructing the terminal device and/or the first core network element to enable the transmission synchronization function, so that multiple data packets can Implement synchronous transmission in network architecture.

Description of drawings

Figure 1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

Figure 2 is an architectural diagram of a 5G system provided by an embodiment of the present application;

Figure 3 is an architectural diagram of a 5G system provided by another embodiment of the present application;

Figure 4 is a schematic diagram of data transmission provided by an embodiment of the present application;

Figure 5 is a flow chart of a data transmission method provided by an embodiment of the present application;

Figure 6 is a schematic diagram of data transmission provided by another embodiment of the present application;

Figure 7 is a flow chart of a data transmission method provided by another embodiment of the present application;

Figure 8 is a flow chart of a wireless communication method provided by an embodiment of the present application;

Figure 9 is a block diagram of a data transmission device provided by an embodiment of the present application;

Figure 10 is a block diagram of a data transmission device provided by another embodiment of the present application;

Figure 11 is a block diagram of a wireless communication device provided by an embodiment of the present application;

Figure 12 is a block diagram of a communication device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The network architecture and business scenarios described in the embodiments of this application are to more clearly explain the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art will know that with the network architecture evolution and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

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

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application can also be applied to these communication systems.

The communication system in the embodiment of this application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) network deployment scenario.

The communication system in the embodiment of the present application can be applied to the unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or the communication system in the embodiment of the present application can also be applied to the licensed spectrum, where the licensed spectrum can also be Considered a non-shared spectrum.

The embodiments of the present application can be applied to non-terrestrial communication network (Non-Terrestrial Networks, NTN) systems, and can also be applied to terrestrial communication network (Terrestrial Networks, TN) systems.

Please refer to Figure 1, which shows a schematic diagram of a network architecture provided by an embodiment of the present application. The network architecture may include: terminal equipment 10, access network equipment 20 and core network elements 30.

The terminal equipment 10 may refer to a UE (User Equipment), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent or a user device. In some embodiments, the terminal device 10 may also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, or a PDA (Personal Digital Assistant). processing), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5GS (5th Generation System, fifth-generation mobile communication system) or future evolutions Terminal equipment in a PLMN (Public Land Mobile Network), etc., the embodiments of the present application are not limited to this. For convenience of description, the devices mentioned above are collectively referred to as terminal devices. The number of terminal devices 10 is usually multiple, and one or more terminal devices 10 may be distributed in the cell managed by each access network device 20 . In the embodiments of this application, "terminal equipment" and "UE" are often used interchangeably, but those skilled in the art can understand their meanings.

The access network device 20 is a device deployed in the access network to provide wireless communication functions for the terminal device 10 . The access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in 5G NR systems, they are called gNodeB or gNB. As communication technology evolves, the name "access network equipment" may change. For convenience of description, in the embodiment of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 10 are collectively referred to as access network devices. In some embodiments, through the access network device 20, a communication relationship can be established between the terminal device 10 and the core network element 30. For example, in an LTE (Long Term Evolution, Long Term Evolution) system, the access network device 20 may be EUTRAN (Evolved Universal Terrestrial Radio Access Network, Evolved Universal Terrestrial Wireless Network) or one or more eNodeBs in EUTRAN; In the 5G NR system, the access network device 20 may be a RAN (Radio Access Network) or one or more gNBs in the RAN.

The core network element 30 is a network element deployed in the core network. The functions of the core network element 30 are mainly to provide user connections, manage users and carry services, and serve as an interface to the external network for the bearer network. For example, the core network elements in the 5G NR system can include AMF (Access and Mobility Management Function, access and mobility management function), UPF (User Plane Function, user plane function) and SMF (Session Management Function, session management function) ) and other network elements. In addition, core network elements can be regarded as functional entities, and one or more core network elements can be deployed on a physical device.

In some embodiments, the access network device 20 and the core network element 30 communicate with each other through some air interface technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other through some air interface technology, such as the Uu interface.

The "5G NR system" in the embodiments of this application may also be called a 5G system or an NR system, but those skilled in the art can understand its meaning. The technical solution described in the embodiment of this application can be applied to the LTE system, the 5G NR system, the subsequent evolution system of the 5G NR system, and can also be applied to applications such as NB-IoT (Narrow Band Internet of Things, narrowband Internet of Things) systems and other communication systems, this application does not limit this.

In this embodiment of the present application, the access network equipment can provide services for the cell, and the terminal equipment communicates with the access network equipment through the transmission resources (for example, frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be a cell corresponding to the access network equipment (such as a base station). The cell can belong to a macro base station or a base station corresponding to a small cell (Small cell). The small cell here can include: urban cell (Metro cell), micro cell Micro cell, Pico cell, Femto cell, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

Please refer to Figure 2, which shows a schematic diagram of the system architecture of the 5GS (5th Generation System, fifth generation mobile communication system) provided by the embodiment of the present application. As shown in Figure 2, the system architecture 200 may include: UE (that is, the "terminal equipment" introduced above), (R)AN ((Radio) Access Network, (wireless) access network), Core (core network) ) and DN (Data Network, data network). Among them, UE, (R)AN, and Core (core network) are the main components of the architecture. Logically, they can be divided into two parts: the user plane and the control plane. The control plane is responsible for the management of the mobile network, and the user plane is responsible for the transmission of business data. . In Figure 2, the NG2 reference point is located between the (R)AN control plane and the Core control plane, the NG3 reference point is located between the (R)AN user plane and the Core user plane, and the NG6 reference point is located between the Core user plane and the data network. .

UE: It is the entrance for mobile users to interact with the network. It can provide basic computing capabilities and storage capabilities, display business windows to users, and receive user operation inputs. The UE will use next-generation air interface technology to establish signal connections and data connections with (R)AN to transmit control signals and business data to the mobile network.

(R)AN: Similar to base stations in traditional networks, it is deployed close to the UE to provide network access functions for authorized users in specific areas, and can use transmission tunnels of different qualities to transmit user data according to user levels, business needs, etc. . (R)AN can manage its own resources, utilize them rationally, provide access services to UEs on demand, and forward control signals and user data between UEs and the core network.

Core: Responsible for maintaining mobile network subscription data, managing mobile network elements, and providing UE with functions such as session management, mobility management, policy management, and security authentication. When the UE is attached, it provides network access authentication for the UE; when the UE has a service request, it allocates network resources to the UE; when the UE moves, it updates network resources for the UE; when the UE is idle, it provides a fast recovery mechanism for the UE: When the UE detaches, network resources are released for the UE; when the UE has service data, it provides data routing functions for the UE, such as forwarding uplink data to the DN: or receiving the UE downlink data from the DN and forwarding it to the (R)AN, thus Sent to UE.

DN: It is a data network that provides business services to users. Generally, the client is located in the UE and the server is located in the data network. The data network can be a private network, such as a local area network, or an external network that is not controlled by the operator, such as the Internet, or a proprietary network jointly deployed by the operator, such as configuring IMS (IP Multimedia Core Network Subsystem, IP Multimedia Network subsystem) services.

Figure 3 is the detailed architecture determined based on Figure 2. The core network user plane includes UPF (User Plane Function); the core network control plane includes AUSF (Authentication Server Function), AMF, and SMF. , NSSF (Network Slice Selection Function, network slice selection function), NEF (Network Exposure Function, network opening function), NRF (Network Repository Function, network storage function), UDM (Unified Data Management, unified data management), PCF (Policy Control Function, policy control function), AF (Application Function, application function).

In the architecture shown in Figure 3, the UE performs AS (Access Stratum, access layer) connection with (R)AN through the Uu port, exchanges AS messages and wireless data transmission, and the UE performs NAS (Non Access Stratum, Non Access Stratum, Access Layer) with the AMF through the N1 port. non-access layer) connection and exchange NAS messages. AMF is the mobility management function in the core network, and SMF is the session management function in the core network. In addition to mobility management of the UE, the AMF is also responsible for forwarding session management related messages between the UE and the SMF. PCF is the policy management function in the core network and is responsible for formulating policies related to UE mobility management, session management, and charging. UPF is the user plane function in the core network. It transmits data with the external data network through the N6 interface and with (R)AN through the N3 interface.

It should be noted that the interface names between network elements in Figures 2 and 3 are just examples. In specific implementations, the names of the interfaces may be other names, and this is not specifically limited in the embodiments of this application. The names of various network elements (such as SMF, AF, UPF, etc.) included in Figures 2 and 3 are only examples and do not limit the functions of the network elements themselves. In 5GS and other future networks, each of the above network elements may also have other names, which are not specifically limited in the embodiments of this application. For example, in a 6G network, some or all of the above-mentioned network elements may use the terminology used in 5G, or may adopt other names, etc., which will be described uniformly here and will not be described in detail below. In addition, it should be understood that the names of the above-mentioned messages (or signaling) transmitted between various network elements are only examples and do not constitute any limitation on the function of the messages themselves.

In some embodiments, the network elements related to the policy are mainly PCF, AMF, SMF, RAN, and UE. Among them, SMF is mainly responsible for the execution of policies related to sessions, and AMF is mainly responsible for the execution of policies related to access and UE policies. Policy delivery and updates on the two network elements (AMF and SMF) are all controlled by PCF.

Specific to the UE policy, the PCF and the UE monitor UE policy-related information through a Container, including the content of the UE policy, the UE policy identifier, etc. The Container is sent by the UE to the AMF through the NAS message in the uplink direction, and is continued to be transparently transmitted (without perception or modification) by the AMF to the PCF. In the downlink direction, the Container is sent by the PCF to the AMF, and the AMF then passes the Container to the PCF. NAS messages are transparently transmitted to the UE.

Before introducing the technical solutions of this application, some background technical knowledge involved in this application will be introduced and explained. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application. The embodiments of this application include at least part of the following contents.

The concept of QoS (Quality of Service, Quality of Service) flow is introduced in the 5G network. As shown in Figure 4, after the UE accesses the 5G network through the Uu port, a QoS flow is established under the control of the SMF for data transmission. The SMF provides each QoS to the base station. QoS flow configuration information of the flow. QoS flow configuration information can include code rate requirements, delay requirements, bit error rate requirements and other information. For each QoS flow, the base station schedules wireless resources according to the QoS flow configuration information received from the SMF to guarantee the QoS requirements of the QoS flow. A QoS flow in the 5G network can transmit both the uplink data stream (the data stream that the UE sends to the peer device through the 5G network) and the downlink data stream (the data stream that the peer device sends to the UE through the 5G network). Here The peer device refers to the peer application server or peer UE. Optionally, the delay requirements of the upstream data flow and the downstream data flow in a QoS flow are the same. If the upstream and downstream data flows of a certain service have different latency requirements, they will be transmitted through different QoS flows. The delay here refers to the data transmission delay between the UE and UPF. For example, for the uplink data flow, the data transmission delay may refer to the transmission delay of the uplink data packet from the UE to the UPF; for the downlink data flow, the data transmission delay may refer to the transmission delay of the downlink data packet from the UPF to the UE.

The application layer data interacted between the UE and the application server or the peer UE, such as AR (Augmented Reality, augmented reality), VR (Virtual Reality, virtual reality), cloud gaming (Cloud gaming), video live broadcast data, etc., usually includes Business data flows in multiple modes such as voice, video, text, and control information usually require synchronization between different data flows. For example, business data such as voice, video, and subtitles need to be displayed to users simultaneously. For video playback scenarios, synchronization between multiple data streams is performed through the target protocol layer. In an optional solution, multiple received data streams are cached, and corresponding data frames of the multiple data streams are extracted and displayed to the user synchronously based on the timestamp of the playback data stream. However, considering that AR, VR, cloud games, live video and other scenarios require more timely data display or data interaction, after receiving some data, it is impossible to wait for all the data that needs to be synchronized on the UE side before synchronous playback (that is, it cannot Long-term data caching on the UE side). Therefore, this alternative solution cannot effectively support the synchronization needs of real-time services such as AR, VR, cloud games, and live video broadcasts. Data interruption, garbled characters, missing images, missing voices, etc. may often occur, affecting the user experience.

Based on this, embodiments of the present application provide a data transmission method that can realize synchronous transmission of multiple data packets. Specifically, the method can be introduced through the following embodiment.

Please refer to Figure 5, which shows a flow chart of a data transmission method provided by an embodiment of the present application. This method can be performed by the terminal device described above. As shown in Figure 5, the method may include at least one of the following steps (510~530):

Step 510: The terminal device reads the target protocol layer information of the first uplink data packet to be sent.

In some embodiments, the first uplink data packet to be sent refers to an uplink data packet that has not been sent by the terminal device, for example, a data packet that has not been sent by the terminal device to the access network device. Optionally, the first uplink data packet is generated by the application layer of the terminal device, and the first uplink data packet refers to an uplink data packet that has been generated by the application layer but has not yet been sent through the transport layer/physical layer.

Optionally, the first uplink data packet may include a packet header and a packet body.

In some embodiments, the first uplink data packet is an IP (Internet Protocol) data packet. Optionally, the header of the IP data packet includes an IP five-tuple (such as source IP address, destination IP address, source port number, destination port number, etc.), and the body of the IP data packet is RTP (Real-time Transport Protocol, Real-Time Transport Protocol) packets. RTP data packets can include RTP headers and RTP bodies. Optionally, the target protocol layer information is stored in the body of the first uplink data packet, and the terminal device can read the target protocol layer information from the body of the first uplink data packet. Taking the target protocol layer information as RTP layer information as an example, the RTP layer information can be stored in the RTP header, and the terminal device can read the RTP layer information from the body of the IP data packet (such as the RTP header).

In some embodiments, the target protocol layer refers to the transport layer or a protocol layer above the transport layer. Optionally, the target protocol layer includes but is not limited to at least one of the following: RTP layer, RTCP layer, HTTP (Hyper Text Transfer Protocol, Hypertext Transfer Protocol) layer, and video compression layer.

Step 520: The terminal device determines the first transmission time information based on the target protocol layer information of the first uplink data packet.

In some embodiments, the terminal device determines the first transmission time information based on the information contained in the target protocol layer information.

In some embodiments, the terminal device obtains the first relative time from the target protocol layer information of the first uplink data packet; based on the correspondence between the relative time and the absolute time, based on the absolute time corresponding to the first relative time, Determine first transmission time information. Optionally, the above correspondence relationship refers to the conversion relationship between relative time and absolute time. Absolute time can indicate a specific time point in physical concepts (or a specific moment); relative time is a relative concept, and it is impossible to determine a specific time point in physical concepts based on relative time alone. Optionally, the relative time is the RTP time (or RTP timestamp) obtained from the RTP header introduced above, and the absolute time is the NTP (Network Time Protocol) time. NTP is a protocol used to achieve time synchronization. It allows a computer to synchronize its server or clock source (such as quartz clock, GPS, etc.). It can be used to achieve high-precision time correction. Usually, in LAN (Local) Area Network (LAN), the error of the correction result relative to the standard time is less than 1 millisecond, and on WAN (Wide Area Network, wide area network), the error of the correction result relative to the standard time is less than tens of milliseconds.

Optionally, the first transmission time information refers to/is used to instruct the terminal device (such as the application layer) to generate the time point/moment of the first uplink data packet; or the first transmission time information refers to/is used to instruct the terminal device to The time point/moment when the access network equipment sends the first uplink data packet; or, the first transmission time information refers to/is used to indicate the time point/moment when the access network equipment sends the first uplink data packet to the first core network element/ time; or, the first transmission time information refers to/is used to indicate the time point/time at which the first core network element sends the first uplink data packet to the data network.

In some embodiments, an uplink data packet is selected as the reference data packet, and the generation time of the reference data packet is the reference time point. Alternatively, the relative time may refer to the generation time of each data packet relative to the reference time point. For example, the time point when the terminal device generates the reference data packet (ie, the reference time point) can be set to 0 hours, 0 minutes and 0 seconds. If the data packet 1 generated by the terminal device is generated 1 second after the reference data packet, then data packet 1 The relative time can be 1 second.

In some embodiments, the first transmission time information is an absolute time corresponding to the first relative time. That is, the obtained absolute time is determined only based on the first relative time and the corresponding relationship as the first transmission time information. In some embodiments, the corresponding relationship may refer to: first transmission time information = reference time point + first relative time.

For example, if the reference time point is 9 hours, 30 minutes and 10 seconds, and the relative time of data packet 1 is 1 second, then the absolute time corresponding to data packet 1 (that is, the absolute time corresponding to the first relative time) is: reference time point + Relative time of packet 1 = 9 hours, 30 minutes and 11 seconds.

In some embodiments, relative time may refer to the order in which data packets are generated in the terminal device. For example, the relative time of the reference data packet can be represented by 0; the data packets generated after the reference data packet use the generation order of 1, 2, 3... etc. to represent the corresponding relative time, and so on, after the reference data packet The relative time of the nth (or nth batch) generated data packet can be expressed as n-1.

In some embodiments, for scenarios where the generation order is used to represent the relative time of data packets, the time interval between two adjacent data packets can be determined by the corresponding relationship, or configured by the network, or a preset value agreed upon by the protocol. Or depends on the end device implementation. For example, if the reference time point is 10 hours, 10 minutes and 0 seconds, and the time interval is 5 seconds, then the transmission time corresponding to the data packet with a relative time of 0 is 10 hours, 10 minutes and 0 seconds; the transmission time corresponding to the data packet with a relative time of 1 The transmission time can be 10 hours, 10 minutes and 05 seconds (that is, 10 hours, 10 minutes, 0 seconds + 5 seconds); the transmission time corresponding to the data packet with a relative time of 2 can be 10 hours, 10 minutes and 10 seconds (that is, 10 hours, 10 minutes, 0 seconds) +2×5 seconds)...The transmission time corresponding to the data packet with relative time n can be 10 hours, 10 minutes and 0 seconds +n×5 seconds.

In some embodiments, the first transmission time information is determined based on the absolute time corresponding to the first relative time and the first offset time. For example, the first transmission time information is: the sum of the absolute time corresponding to the first relative time and the first offset time. For example, if the absolute time corresponding to the first relative time is 9:30 minutes and 11 seconds, and the first offset time is 30 seconds, then adding 9:30 minutes and 11 seconds to 30 seconds can obtain the first transmission time information as 9:30:41.

In some embodiments, the terminal device obtains the correspondence between the relative time and the absolute time from the first control data packet associated with the first uplink data packet. Based on the first relative time and the corresponding relationship, the terminal device can infer/calculate/determine to obtain the first transmission time information (that is, the absolute time corresponding to the first relative time); further, it can also based on the absolute time corresponding to the first relative time. and the first offset time, and the first transmission time information is obtained by inferring/calculating/determining.

In some embodiments, the association between the first uplink data packet and the first control data packet is determined based on the synchronization source (SSRC, Synchronization source) identifiers carried in the first uplink data packet and the first control data packet respectively. In some embodiments, if the synchronization source identifiers respectively carried in the first uplink data packet and the first control data packet match (for example, the synchronization source identifiers are the same), it means that the first control data packet and the first uplink data packet have the above-mentioned association relationship. .

In some embodiments, the first uplink data packet is an RTP data packet, and the first control data packet is an RTCP (Real-time Transport Control Protocol) data packet. If the SSRC identifiers carried in the RTP data packet and the RTCP data packet respectively match (for example, the SSRC identifiers are the same), it means that the RTP data packet and the RTCP data packet have the above-mentioned association relationship.

In some embodiments, the target protocol layer information includes first transmission time information. Therefore, the terminal device can directly determine the first transmission time information based on the target protocol layer information, for example, directly obtain the first transmission time information from the target protocol layer information.

Step 530: The terminal device sends the first uplink data packet according to the first transmission time information.

Optionally, the terminal device may send the first uplink data packet to the access network device, and send the first uplink data packet to the UPF/external data network through the access network device.

In some embodiments, the terminal device requests transmission resources for transmitting the first uplink data packet from the access network device according to the first transmission time information. Optionally, the terminal device may request transmission resources (such as time-frequency resources) from the access network device to send the first uplink data packet, and the request may carry time information determined based on the first transmission time information. The access network device may allocate transmission resources for transmitting the first uplink data packet to the terminal device according to the time information carried in the request. Optionally, the time information carried in the request may be the first transmission time information, or the time information obtained by adding an offset value to the first transmission time information, or other information that enables the access network device to determine Information about the transmission resource of the first uplink data packet is obtained, which is not limited in this application.

In some embodiments, the terminal device sends a second uplink data packet to the access network device, and the second uplink data packet includes the first transmission time information and the first uplink data packet. The terminal device may generate a second uplink data packet based on the first transmission time information and the first uplink data packet.

In some embodiments, the header of the second uplink data packet includes the first transmission time information, and the packet body of the second uplink data packet includes the first uplink data packet. For example, the terminal device adds a header before the first uplink data packet to generate a second uplink data packet. The added header is the header of the second uplink data packet, and the first uplink data packet becomes the packet header of the second uplink data packet. body. Furthermore, the terminal device may add the first transmission time information to the added header.

In some embodiments, the first transmission time information is also used by the access network device to determine the timing of sending the first uplink data packet to the first core network element. If the first transmission time information refers to/is used to instruct the terminal device to generate the time point/moment of the first uplink data packet, or the first transmission time information refers to/is used to instruct the terminal device to send the first uplink data to the access network device The time point/moment of the packet, then the timing (or time domain position) when the access network device sends the first uplink data packet to the first core network element can be the first transmission time information plus the corresponding offset time; If the first transmission time information refers to/is used to indicate the time point/moment when the access network device sends the first uplink data packet to the first core network element, the access network device directly transmits the data at the time corresponding to the first transmission time information. point to send the first uplink data packet to the first core network element; if the first transmission time information refers to/is used to indicate the time point/moment when the first core network element sends the first uplink data packet to the data network, then The timing (or time domain position) when the access network device sends the first uplink data packet to the first core network element may be the first transmission time information minus the corresponding offset time.

In some embodiments, the first transmission time information is also used by the first core network element to determine the timing of sending the first uplink data packet to the data network. If the first transmission time information refers to/is used to instruct the terminal device to generate the time point/moment of the first uplink data packet, or the first transmission time information refers to/is used to instruct the terminal device to send the first uplink data to the access network device The time point/moment of the packet or the first transmission time information refers to/is used to indicate the time point/moment when the access network device sends the first uplink data packet to the first core network element, then the first core network element will The timing of sending the first uplink data packet to the data network may be the first transmission time information plus the corresponding offset time; if the first transmission time information refers to/is used to instruct the first core network element to send the first data packet to the data network. The first core network element directly sends the first uplink data packet to the data network at the time point corresponding to the first transmission time information.

Optionally, the first core network element is UPF, and the data network is DN. For example, if the first transmission time information is 9 hours, 10 minutes and 10 seconds, the first transmission time information refers to/is used to indicate the time point/moment when the terminal device generates the first uplink data packet, then the access network device receives After the first uplink data packet/second uplink data packet, the first uplink data packet/second uplink data packet can be sent to the first core network element at 9:10:15; or, the first core network element After receiving the first uplink data packet/second uplink data packet, the first uplink data packet/second uplink data packet may be sent to the data network at 9:10:20.

In some embodiments, the access network device in the above embodiments sends the first uplink data packet to the first core network element, or the access network device sends the first uplink data packet to the first core network element. It is understood that: the access network device sends the first uplink data packet to the first core network element; or, the access network device sends the second uplink data packet to the first core network element, and the second uplink data packet includes The first transmission time information and the first uplink data packet.

In some embodiments, the first core network element in the above embodiments sends the first uplink data packet to the data network, or the first core network element sends the first uplink data packet to the data network, which can be understood as: A core network element sends the first uplink data packet to the data network; or, the first core network element sends a second uplink data packet to the data network, and the second uplink data packet includes the first transmission time information and the first Upstream data packet.

In some embodiments, the access network device may add an offset time to obtain new transmission time information based on the first transmission time information determined by the terminal device, and compare the new transmission time information with the first uplink The data packets are sent together to the first core network element; the first core network element can send the first uplink data packet to the data network according to the new transmission time information.

In some embodiments, the terminal device determines whether to enable the transmission synchronization function for the first uplink data packet according to the first information; wherein the first information is used to indicate the service data flow for which the transmission synchronization function is enabled. For example, the first information is used to indicate the uplink service data flow enabling the transmission synchronization function. Alternatively, the first information includes synchronization indication information, which is used to explicitly or implicitly indicate to enable the transmission synchronization function for certain/certain service data flows. For the uplink service data flow with the transmission synchronization function enabled, the terminal device will use the method process introduced in the above embodiment to determine the first transmission time according to the target protocol layer information of the uplink data packet. information, and then sends the uplink data packet according to the first transmission time information.

In some embodiments, the first information includes service data flow description information and synchronization indication information; wherein the service data flow description information is used to indicate the characteristics of the service data flow, and the synchronization indication information is used to indicate enabling the transmission synchronization function and/or target The type of protocol layer. The service data flow can refer to the data flow corresponding to a certain service/application, such as game service data flow, video service data flow, voice service data flow, etc.; for video services, the service data flow can also include picture frame data flow, audio data Streams, text data streams, etc.

In addition, if the synchronization indication information is used to indicate enabling the transmission synchronization function, it can be understood that the synchronization indication information is used to explicitly indicate enabling the transmission synchronization function. If the synchronization indication information is used to indicate the type of the target protocol layer, in this case it can be understood that the synchronization indication information is used to implicitly indicate enabling the transmission synchronization function. Alternatively, the synchronization indication information may also be used to indicate enabling the transmission synchronization function and indicating the type of the target protocol layer.

In some embodiments, the first information is sent to the terminal device by the second core network element. Optionally, the second core network element may be PCF or SMF.

In some embodiments, as shown in Figure 6, the AF provides the configuration information of the service data flow to the PCF located in the core network, such as including service data flow description information and synchronization instruction information, where the service data flow description information may be the service data flow Filter information. The data filter information is the characteristics of the header of the data packet received by UPF. For example, for IP type data, it can include source IP address, destination IP address, source port number, destination port number, etc.; for Ether type data, it can include source MAC (Media Access Control) address, destination MAC Address etc. The synchronization indication information is used to indicate that the transmission synchronization function is enabled for the service data flow, and/or to indicate the type of the target protocol layer (such as the protocol layer above the IP/UDP layer). Based on the information sent by AF, PCF determines the PCC (Policy Control and Charging) rules for the service data flow, including the service data flow description information and synchronization instruction information, and sends the PCC rules to SMF. Optionally, the SMF sends service data flow description information and synchronization indication information to the UPF and UE. In some embodiments, the SMF can directly send the service data flow description information and synchronization indication information to the UPF. In some embodiments, after SMF sends the service data flow description information and synchronization instruction information to UPF, UPF sends the service data flow description information and synchronization instruction information to (R)AN, and (R)AN then describes the service data flow information and synchronization instruction information to the UE; or, SMF first sends the service data flow description information and synchronization instruction information to the AMF, and the AMF sends the service data flow description information and synchronization instruction information to (R)AN, and (R)AN then Send the service data flow description information and synchronization instruction information to the UE; or, the SMF first sends the service data flow description information and the synchronization instruction information to the AMF, and the AMF sends the service data flow description information and the synchronization instruction information to the UE.

The technical solution provided by the embodiments of this application is that for the transmission of uplink service data, the transmission time information corresponding to the data packet is determined during the data transmission process, and the uplink data packet is sent according to the transmission time information, thereby being able to control the uplink data packet. transmission time, thereby achieving synchronous transmission of multiple uplink data packets.

Please refer to FIG. 7 , which shows a flow chart of a data transmission method provided by another embodiment of the present application. The method may be executed by the first core network element. As shown in Figure 7, the method may include at least one of the following steps (710-740):

Step 710: The first core network element receives the first downlink data packet from the data network.

In some embodiments, the first core network element is UPF, and the data network DN sends the first downlink data packet to the UPF.

In some embodiments, the first downlink data packet is a data packet generated by the data network, or a data packet obtained by the data network from other terminal devices or AFs, which is not limited in this application.

Optionally, the first downlink data packet may include a packet header and a packet body.

In some embodiments, the first downlink data packet is an IP data packet. Optionally, the header of the IP data packet includes an IP five-tuple (such as source IP address, destination IP address, source port number, destination port number, etc.), and the body of the IP data packet is an RTP data packet. RTP data packets can include RTP headers and RTP bodies.

Step 720: The first core network element reads the target protocol layer information of the first downlink data packet.

Optionally, the target protocol layer information is stored in the body of the first downlink data packet, and the first core network element can read the target protocol layer information from the body of the first downlink data packet. Taking the target protocol layer information as RTP layer information as an example, the RTP layer information can be stored in the RTP packet header, and the first core network element can read the RTP layer information from the body of the IP data packet (such as the RTP packet header).

In some embodiments, the target protocol layer refers to the transport layer or a protocol layer above the transport layer. Optionally, the target protocol layer includes but is not limited to at least one of the following: RTP layer, RTCP layer, HTTP layer, and video compression layer.

Step 730: The first core network element determines the second transmission time information based on the target protocol layer information of the first downlink data packet.

In some embodiments, the first core network element determines the second transmission time information based on the information contained in the target protocol layer information.

In some embodiments, the first core network element obtains the second relative time from the target protocol layer information of the first downlink data packet; based on the correspondence between the relative time and the absolute time, the first core network element obtains the second relative time based on the corresponding relationship between the relative time and the absolute time. The corresponding absolute time determines the second transmission time information. Optionally, the above correspondence relationship refers to the conversion relationship between relative time and absolute time. Absolute time can indicate a specific time point in physical concepts (or a specific moment); relative time is a relative concept, and it is impossible to determine a specific time point in physical concepts based on relative time alone. Optionally, the relative time is the RTP time (or RTP timestamp) obtained from the RTP header introduced above, and the absolute time is the NTP time. NTP is a protocol used to achieve time synchronization. It allows a computer to synchronize its server or clock source (such as quartz clock, GPS, etc.). It can be used to achieve high-precision time correction. Usually, it is corrected on a LAN. The error of the result relative to the standard time is less than 1 millisecond, and the error of the correction result relative to the standard time on the WAN is less than tens of milliseconds.

Optionally, the second transmission time information refers to/is used to indicate the time point/moment when the data network or other terminal equipment or AF generates the first downlink data packet; or the second transmission time information refers to/is used to indicate the data The time point/moment when the network sends the first downlink data packet to the first core network element; or, the second transmission time information refers to/is used to instruct the first core network element to send the first downlink data packet to the access network device. The time point/moment of the data packet; alternatively, the second transmission time information refers to/is used to indicate the time point/moment at which the first core network element sends the first downlink data packet to the terminal device.

In some embodiments, a downlink data packet is selected as the reference data packet, and the generation time of the reference data packet is the reference time point. Alternatively, the relative time may refer to the generation time of each data packet relative to the reference time point. For example, the time point when the data network generates the reference data packet (i.e., the reference time point) can be set to 0 hours, 0 minutes, and 0 seconds. If the data packet 1 generated by the data network is generated 0.5 seconds after the reference data packet, then data packet 1 The relative time can be 0.5 seconds.

In some embodiments, the second transmission time information is an absolute time corresponding to the second relative time. That is, the first core network element only determines the absolute time based on the second relative time and the corresponding relationship as the second transmission time information. In some embodiments, the corresponding relationship may refer to: second transmission time information = reference time point + second relative time.

For example, if the reference time point is 9 hours, 30 minutes and 10 seconds, and the relative time of data packet 1 is 0.5 seconds, then the absolute time corresponding to data packet 1 (that is, the absolute time corresponding to the first relative time) is: reference time point + Relative time of packet 1 = 9 hours, 30 minutes and 10.5 seconds.

In some embodiments, relative time may refer to the order in which data packets are generated in the data network. For example, the relative time of the reference data packet can be represented by 0; the data packets generated after the reference data packet use the generation order of 1, 2, 3... etc. to represent the corresponding relative time, and so on, after the reference data packet The relative time of the nth (or nth batch) generated data packet can be expressed as n-1.

In some embodiments, for scenarios where the generation order is used to represent the relative time of data packets, the time interval between two adjacent data packets can be determined by the corresponding relationship, or configured by the network, or a preset value agreed upon by the protocol. Or it depends on the implementation of the first core network element. For example, if the reference time point is 10 hours, 10 minutes and 0 seconds, and the time interval is 3 seconds, then the transmission time corresponding to the data packet with a relative time of 0 is 10 hours, 10 minutes and 0 seconds; the transmission time corresponding to the data packet with a relative time of 1 The transmission time can be 10 hours 10 minutes 03 seconds (i.e. 10 hours 10 minutes 0 seconds + 3 seconds); the transmission time corresponding to the data packet with relative time 2 can be 10 hours 10 minutes 06 seconds (i.e. 10 hours 10 minutes 0 seconds) +2×3 seconds)...The corresponding transmission time of the data packet with relative time n can be 10 hours, 10 minutes and 0 seconds + n×3 seconds.

In some embodiments, the second transmission time information is determined based on the absolute time corresponding to the second relative time and the second offset time. For example, the second transmission time information is: the sum of the absolute time corresponding to the second relative time and the second offset time. For example, if the absolute time corresponding to the second relative time is 9:30 minutes and 11 seconds, and the second offset time is 15 seconds, then adding 9:30 minutes and 11 seconds to 15 seconds can obtain the second transmission time information 9 Hours 30 minutes and 26 seconds.

In some embodiments, the first core network element obtains the correspondence between the relative time and the absolute time from the second control data packet associated with the first downlink data packet. Based on the second relative time and the corresponding relationship, the first core network element can infer/calculate/determine to obtain the second transmission time information (ie, the absolute time corresponding to the second relative time); further, the first core network element can also The second transmission time information can be inferred/calculated/determined based on the absolute time corresponding to the second relative time and the second offset time.

In some embodiments, the association between the first downlink data packet and the second control data packet is determined based on the synchronization source identifiers respectively carried in the first downlink data packet and the second control data packet. In some embodiments, if the synchronization source identifiers respectively carried in the first downlink data packet and the second control data packet match (for example, the synchronization source identifiers are the same), it means that the second control data packet and the first downlink data packet have the above-mentioned characteristics. connection relation.

In some embodiments, the first downlink data packet is an RTP data packet and the second control data packet is an RTCP data packet. If the SSRC identifiers carried in the RTP data packet and the RTCP data packet respectively match (for example, the SSRC identifiers are the same), it means that the RTP data packet and the RTCP data packet have the above-mentioned association relationship.

In some embodiments, the target protocol layer information includes second transmission time information. Therefore, the first core network element can directly determine the second transmission time information based on the target protocol layer information, for example, directly obtain the second transmission time information from the target protocol layer information.

Step 740: The first core network element sends the first downlink data packet according to the second transmission time information.

In some embodiments, the first core network element sends a second downlink data packet to the access network device, and the second downlink data packet includes second transmission time information and the first downlink data packet. The first core network element may generate a second downlink data packet based on the second transmission time information and the first downlink data packet.

In some embodiments, the header of the second downlink data packet includes second transmission time information, and the packet body of the second downlink data packet includes the first downlink data packet. For example, the first core network element adds a header before the first downlink data packet to generate the second downlink data packet. The added header is the header of the second downlink data packet, and the first downlink data packet becomes the header of the second downlink data packet. 2. The body of the downlink data packet. Furthermore, the first core network element may add the second transmission time information to the added header.

In some embodiments, the second transmission time information is also used by the access network device to determine transmission resource allocation corresponding to the first downlink data packet. For example, the second transmission time information is also used by the access network device to determine the timing of sending the first downlink data packet to the terminal device. If the second transmission time information refers to/is used to indicate the time point/moment when the data network or other terminal equipment or AF generates the first downlink data packet, or the second transmission time information refers/is used to indicate the time point/moment when the data network or other terminal equipment or AF generates the first downlink data packet, The time point/moment when the core network element sends the first downlink data packet, or the second transmission time information refers to/is used to indicate the time point when the first core network element sends the first downlink data packet to the access network device. / time, then the timing (or time domain position, which can be used to represent transmission resources) when the access network device sends the first downlink data packet to the terminal device can be the second transmission time information plus the corresponding offset time; or , if the second transmission time information refers to/is used to indicate the time point/moment when the access network device sends the first downlink data packet to the terminal device, then the access network device can directly send the second transmission time information at the time point corresponding to the second transmission time information. , sending the first downlink data packet to the terminal device.

For example, if the second transmission time information is 9 hours, 10 minutes and 10 seconds, the second transmission time information refers to/is used to indicate the time point/moment when the data network or other terminal equipment or AF generates the first downlink data packet, then After receiving the first downlink data packet/second downlink data packet, the access network device may send the first downlink data packet/second downlink data packet to the terminal device at 9:10:15.

In some embodiments, the access network device in the above embodiments sends the first downlink data packet to the terminal device, or the access network device sends the first downlink data packet to the terminal device, which can be understood as: the access network The device sends the first downlink data packet to the terminal device; or, the access network device sends a second downlink data packet to the terminal device, where the second downlink data packet includes the second transmission time information and the first downlink data packet.

In some embodiments, the first core network element determines whether to enable the transmission synchronization function for the first downlink data packet according to the second information; wherein the second information is used to indicate the service data flow for which the transmission synchronization function is enabled. For example, the second information is used to indicate the downlink service data flow enabling the transmission synchronization function. Alternatively, the second information includes synchronization indication information, which is used to explicitly or implicitly indicate to enable the transmission synchronization function for certain/certain service data flows. For the downlink service data flow with the transmission synchronization function enabled, the first core network element will use the method process introduced in the above embodiment to determine the downlink data packet belonging to the downlink service data flow according to the target protocol layer information of the downlink data packet. second transmission time information, and then sends the downlink data packet according to the second transmission time information.

In some embodiments, the second information includes service data flow description information and synchronization indication information; wherein, the service data flow description information is used to indicate the characteristics of the service data flow, and the synchronization indication information is used to indicate enabling the transmission synchronization function and/or target The type of protocol layer. Business data flow can refer to the data flow corresponding to a certain business/application, such as game business data flow, video business data flow, voice business data flow, etc.; for video business, business data flow can also refer to picture frame data flow, audio data Streams, text data streams, etc.

In addition, if the synchronization indication information is used to indicate enabling the transmission synchronization function, it can be understood that the synchronization indication information is used to explicitly indicate enabling the transmission synchronization function. If the synchronization indication information is used to indicate the type of the target protocol layer, in this case, it can be understood that the synchronization indication information is used to implicitly indicate enabling the transmission synchronization function. Alternatively, the synchronization indication information may also be used to indicate enabling the transmission synchronization function and indicating the type of the target protocol layer.

In some embodiments, the second information is sent by the second core network element to the first core network element. Optionally, the second core network element may be PCF or SMF.

The technical solution provided by the embodiment of the present application corresponds to the transmission of downlink service data. By determining the transmission time information corresponding to the data packet during the data transmission process, and sending the downlink data packet according to the transmission time information, it is possible to control the downlink data packet. transmission time, thereby achieving synchronous transmission of multiple downlink data packets.

Please refer to FIG. 8 , which shows a flow chart of a wireless communication method provided by an embodiment of the present application. This method can be executed by the second core network element. As shown in Figure 8, the method may include the following steps 810:

Step 810: The second core network element sends configuration information to the terminal device and/or the first core network element. The configuration information is used to indicate the service data flow that enables the transmission synchronization function.

Optionally, the first core network element is UPF, and the second core network element is SMF or PCF. The second core network element instructs the terminal device and/or the first core network element to enable the transmission synchronization function by sending configuration information to the terminal device and/or the first core network element. In some embodiments, SMF can send configuration information directly to UPF. In some embodiments, after the SMF sends the configuration information to the UPF, the UPF sends the configuration information to the (R)AN, and the (R)AN then sends the configuration information to the UE; or, the SMF first sends the configuration information to the AMF, and the AMF Send the configuration information to the (R)AN, and the (R)AN then sends the configuration information to the UE; or, the SMF first sends the configuration information to the AMF, and the AMF sends the configuration information to the UE.

In some embodiments, the second core network element sends the first information to the terminal device, and the first information is used to indicate the uplink service data flow enabling the transmission synchronization function. For example, the first information is used to indicate the uplink service data flow enabling the transmission synchronization function. Alternatively, the first information includes synchronization indication information, which is used to explicitly or implicitly indicate to enable the transmission synchronization function for certain/certain service data flows. For the uplink service data flow with the transmission synchronization function enabled, the terminal device will use the method process introduced in the above embodiment to determine the first transmission time according to the target protocol layer information of the uplink data packet. information, and then sends the uplink data packet according to the first transmission time information.

In some embodiments, the second core network element sends second information to the first core network element, and the second information is used to indicate the downlink service data flow enabling the transmission synchronization function. For example, the second information is used to indicate the downlink service data flow enabling the transmission synchronization function. Alternatively, the second information includes synchronization indication information, which is used to explicitly or implicitly indicate to enable the transmission synchronization function for certain/certain service data flows. For the downlink service data flow with the transmission synchronization function enabled, the first core network element will use the method process introduced in the above embodiment to determine the downlink data packet belonging to the downlink service data flow according to the target protocol layer information of the downlink data packet. second transmission time information, and then sends the downlink data packet according to the second transmission time information.

In some embodiments, the configuration information includes service data flow description information and synchronization indication information; wherein, the service data flow description information is used to indicate the characteristics of the service data flow, and the synchronization indication information is used to indicate enabling the transmission synchronization function and/or the target protocol. Type of layer. The service data flow can refer to the data flow corresponding to a certain service/application, such as game service data flow, video service data flow, voice service data flow, etc.; for video services, the service data flow can also include picture frame data flow, audio data Streams, text data streams, etc.

In addition, if the synchronization indication information is used to indicate enabling the transmission synchronization function, it can be understood that the synchronization indication information is used to explicitly indicate enabling the transmission synchronization function. If the synchronization indication information is used to indicate the type of the target protocol layer, in this case, it can be understood that the synchronization indication information is used to implicitly indicate enabling the transmission synchronization function. Alternatively, the synchronization indication information may also be used to indicate that the transport synchronization function is enabled and to indicate the type of target protocol layer.

In some embodiments, the target protocol layer refers to the transport layer or a protocol layer above the transport layer, including but not limited to at least one of the following: RTP layer, RTCP layer, HTTP layer, and video compression layer.

The technical solution provided by the embodiment of the present application sends configuration information to the terminal device and/or the first core network element through the second core network element, instructing the terminal device and/or the first core network element to enable the transmission synchronization function, thereby Multiple data packets can be transmitted simultaneously within the network architecture.

It should be noted that, in order to facilitate description and understanding, the time-related examples in the embodiments of this application are taken at the second level. In actual situations, the time for data packet transmission and processing may be at the millisecond, microsecond, or nanosecond level. This application uses This is not a limitation.

In addition, the various embodiments provided in this application can be combined arbitrarily, which are all within the protection scope of this application. Furthermore, for details that are not described in detail in one embodiment, refer to the introduction and description of relevant content in another embodiment.

The following are device embodiments of the present application, which can be used to execute method embodiments of the present application. For details not disclosed in the device embodiments of this application, please refer to the method embodiments of this application.

Please refer to FIG. 9 , which shows a block diagram of a data transmission device provided by an embodiment of the present application. The device has the function of realizing the above example of the data transmission method on the terminal device side. The function can be realized by hardware, or can also be realized by hardware executing corresponding software. The device may be a terminal device or may be provided in the terminal device. As shown in FIG. 9 , the device 900 may include: an information reading module 910 , an information determining module 920 and a sending module 930 .

The information reading module 910 is used to read the target protocol layer information of the first uplink data packet to be sent.

The information determination module 920 is configured to determine the first transmission time information according to the target protocol layer information of the first uplink data packet.

The sending module 930 is configured to send the first uplink data packet according to the first transmission time information.

In some embodiments, the information determination module 920 is used to:

Obtain the first relative time from the target protocol layer information of the first uplink data packet;

Based on the correspondence between relative time and absolute time, the first transmission time information is determined according to the absolute time corresponding to the first relative time.

In some embodiments, the first transmission time information is an absolute time corresponding to the first relative time.

In some embodiments, the apparatus 900 further includes: a relationship acquisition module (not shown in Figure 9), configured to acquire the relative time and Correspondence between absolute times.

In some embodiments, the association between the first uplink data packet and the first control data packet is based on the synchronization source identifier respectively carried in the first uplink data packet and the first control data packet. Sure.

In some embodiments, the first uplink data packet is an RTP data packet, and the first control data packet is an RTCP data packet.

In some embodiments, the sending module 930 is configured to request transmission resources for transmitting the first uplink data packet from the access network device according to the first transmission time information; and/or request the access network device for transmission resources. The network device sends a second uplink data packet, where the second uplink data packet includes the first transmission time information and the first uplink data packet.

In some embodiments, the header of the second uplink data packet includes the first transmission time information, and the body of the second uplink data packet includes the first uplink data packet.

In some embodiments, the first transmission time information is also used by the access network device to determine the timing of sending the first uplink data packet to the first core network element; and/or the first transmission time The information is also used by the first core network element to determine the timing of sending the first uplink data packet to the data network.

In some embodiments, the access network device sends the first uplink data packet to the first core network element; or, the access network device sends the second uplink data packet to the first core network element. Uplink data packet, the second uplink data packet includes the first transmission time information and the first uplink data packet.

In some embodiments, the first core network element sends the first uplink data packet to the data network; or, the first core network element sends the second uplink data packet to the data network, The second uplink data packet includes the first transmission time information and the first uplink data packet.

In some embodiments, the apparatus 900 further includes: a synchronization determination module (not shown in Figure 9), configured to determine whether to enable a transmission synchronization function for the first uplink data packet according to the first information; wherein, the The first information is used to indicate the service data flow enabling the transmission synchronization function.

In some embodiments, the first information includes service data flow description information and synchronization indication information; wherein the service data flow description information is used to indicate the characteristics of the service data flow, and the synchronization indication information is used to indicate enabling all Describes the transport synchronization function and/or the type of the target protocol layer.

In some embodiments, the first information is sent to the terminal device by the second core network element.

In some embodiments, the target protocol layer refers to a transport layer or a protocol layer above the transport layer, including at least one of the following: RTP layer, RTCP layer, HTTP layer, and video compression layer.

The technical solution provided by the embodiment of the present application can control the transmission time of the uplink data packet by determining the transmission time information corresponding to the data packet during the data transmission process, and sending the uplink data packet according to the transmission time information, thereby achieving multiple Synchronous transmission of upstream data packets.

Please refer to FIG. 10 , which shows a block diagram of a data transmission device provided by another embodiment of the present application. The device has the function of realizing the above example of the data transmission method on the network element side of the first core network. The function can be realized by hardware, or can also be realized by hardware executing corresponding software. The device may be the first core network element, or may be provided in the first core network element. As shown in Figure 10, the device 1000 may include: a receiving module 1010, an information reading module 1020, an information determining module 1030 and a sending module 1040.

The receiving module 1010 is configured to receive the first downlink data packet from the data network.

The information reading module 1020 is used to read the target protocol layer information of the first downlink data packet.

The information determination module 1030 is configured to determine the second transmission time information according to the target protocol layer information of the first downlink data packet.

The sending module 1040 is configured to send the first downlink data packet according to the second transmission time information.

In some embodiments, the information determination module 1030 is used to:

Obtain the second relative time from the target protocol layer information of the first downlink data packet;

Based on the correspondence between relative time and absolute time, the second transmission time information is determined according to the absolute time corresponding to the second relative time.

In some embodiments, the second transmission time information is an absolute time corresponding to the second relative time.

In some embodiments, the apparatus 1000 further includes: a relationship acquisition module (not shown in Figure 10), configured to acquire the relative time from the second control data packet associated with the first downlink data packet. Correspondence to absolute time.

In some embodiments, the association between the first downlink data packet and the second control data packet is based on the synchronization information carried in the first downlink data packet and the second control data packet respectively. Source ID determined.

In some embodiments, the first downlink data packet is an RTP data packet, and the second control data packet is an RTCP data packet.

In some embodiments, the sending module 1040 is configured to: send a second downlink data packet to the access network device, where the second downlink data packet includes the second transmission time information and the first downlink data packet. data pack.

In some embodiments, the header of the second downlink data packet includes the second transmission time information, and the body of the second downlink data packet includes the first downlink data packet.

In some embodiments, the second transmission time information is also used by the access network device to determine transmission resource allocation corresponding to the first downlink data packet.

In some embodiments, the access network device sends the first downlink data packet to the terminal device; or, the access network device sends the second downlink data packet to the terminal device, and the second downlink data packet includes the second transmission time information and the first downlink data packet.

In some embodiments, the device 1000 further includes: a synchronization determination module (not shown in Figure 10), configured to determine whether to enable a transmission synchronization function for the first downlink data packet according to the second information; wherein, The second information is used to indicate the service data flow enabling the transmission synchronization function.

In some embodiments, the second information includes service data flow description information and synchronization indication information; wherein the service data flow description information is used to indicate the characteristics of the service data flow, and the synchronization indication information is used to indicate enabling all Describes the transport synchronization function and/or the type of the target protocol layer.

In some embodiments, the second information is sent by the second core network element to the first core network element.

The technical solution provided by the embodiment of the present application can control the transmission time of the downlink data packet by determining the transmission time information corresponding to the data packet during the data transmission process, and sending the downlink data packet according to the transmission time information, thereby achieving multiple Synchronous transmission of downstream data packets.

Please refer to FIG. 11 , which shows a block diagram of a wireless communication device provided by an embodiment of the present application. The device has the function of realizing the above-mentioned wireless communication method example on the second core network element side. The function can be realized by hardware, or can also be realized by hardware executing corresponding software. The device may be a second core network element, or may be provided in the second core network element. As shown in Figure 11, the device 1100 may include: a sending module 1110.

The sending module 1110 is configured to send configuration information to the terminal device and/or the first core network element, where the configuration information is used to indicate the service data flow enabling the transmission synchronization function.

In some embodiments, the sending module 1110 is configured to: send first information to the terminal device, where the first information is used to indicate the uplink service data flow enabling the transmission synchronization function; and/or, to The first core network element sends second information, where the second information is used to indicate the downlink service data flow enabling the transmission synchronization function.

In some embodiments, the configuration information includes service data flow description information and synchronization indication information; wherein the service data flow description information is used to indicate the characteristics of the service data flow, and the synchronization indication information is used to indicate enabling the Type of transport synchronization function and/or target protocol layer.

In some embodiments, the second core network element is PCF or SMF.

It should be noted that when the device provided in the above embodiment implements its functions, only the division of the above functional modules is used as an example. In practical applications, the above functions can be allocated to different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.

Regarding the devices in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Please refer to Figure 12, which shows a schematic structural diagram of a communication device 1200 provided by an embodiment of the present application. The communication device 1200 may be a terminal device or a network device. The communication device 1200 may be used to perform the above-mentioned data transmission method on the terminal device side, or implement the above-mentioned data transmission method on the first core network element side, or implement the above-mentioned wireless communication method on the second core network element side. The communication device 1200 may include a processor 1201, a transceiver 1202, and a memory 1203.

The processor 1201 includes one or more processing cores. The processor 1201 executes various functional applications and information processing by running software programs and modules.

The transceiver 1202 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, and the wireless communication component may include a wireless communication chip and a radio frequency antenna.

Memory 1203 may be connected to processor 1201 and transceiver 1202.

The memory 1203 may be used to store a computer program executed by the processor, and the processor 1201 is used to execute the computer program to implement various steps executed by the terminal device in the above method embodiment.

Additionally, memory 1203 may be implemented by any type of volatile or non-volatile storage device, or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-only memory, erasable programmable read-only memory, static ready-access memory, read-only memory, magnetic memory, flash memory, programmable read-only memory.

In an exemplary embodiment, when the communication device 1200 is a terminal device, the processor 1201 is configured to read the target protocol layer information of the first uplink data packet to be sent; according to the first uplink data packet The target protocol layer information determines the first transmission time information; and sends the first uplink data packet according to the first transmission time information.

In an exemplary embodiment, when the communication device 1200 is a first core network element, the processor 1201 is configured to receive a first downlink data packet from the data network; read the first downlink data packet; Target protocol layer information of the data packet; determining second transmission time information based on the target protocol layer information of the first downlink data packet; and sending the first downlink data packet based on the second transmission time information.

In an exemplary embodiment, when the communication device 1200 is a second core network element, the processor 1201 is configured to send configuration information to the terminal device and/or the first core network element, and the configuration information Used to indicate the business data flow with transport synchronization enabled.

For details that are not described in detail in this embodiment, please refer to the above embodiments and will not be described again here.

An embodiment of the present application also provides a communication device. The communication device includes a processor and a memory. A computer program is stored in the memory. The processor executes the computer program to implement the above data transmission method on the terminal device side. , or implement the above-mentioned data transmission method on the first core network element side, or implement the above-mentioned wireless communication method on the second core network element side.

Embodiments of the present application also provide a computer-readable storage medium. A computer program is stored in the storage medium. The computer program is used to be executed by a processor of a communication device to implement the above data transmission method on the terminal device side. Either implement the above-mentioned data transmission method on the first core network element side, or implement the above-mentioned wireless communication method on the second core network element side.

In some embodiments, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives, solid state drive) or optical disk, etc. . Among them, random access memory can include ReRAM (Resistance Random Access Memory, resistive random access memory) and DRAM (Dynamic Random Access Memory, dynamic random access memory).

Embodiments of the present application also provide a chip, which includes programmable logic circuits and/or program instructions. When the chip is run on a communication device, it is used to implement the above data transmission method on the terminal device side, or to implement The above-mentioned data transmission method on the first core network element side, or the above-mentioned wireless communication method on the second core network element side.

Embodiments of the present application also provide a computer program product or computer program. The computer program product or computer program includes computer instructions. The computer instructions are stored in a computer-readable storage medium. The processor of the communication device obtains the information from the computer. The readable storage medium reads and executes the computer instructions to implement the data transmission method on the terminal device side, or the data transmission method on the first core network element side, or the second core network element side. Wireless communication methods.

It should be understood that "plurality" mentioned in this article means two or more than two. "And/or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the related objects are in an "or" relationship.

In addition, the step numbers described in this article only illustrate a possible execution sequence between the steps. In some other embodiments, the above steps may not be executed in the numbering sequence, such as two different numbers. The steps are executed simultaneously, or two steps with different numbers are executed in the reverse order as shown in the figure, which is not limited in the embodiments of the present application.

Those skilled in the art should realize that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Storage media can be any available media that can be accessed by a general purpose or special purpose computer.

The above are only exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims

A data transmission method, characterized in that the method is executed by a terminal device, and the method includes:

Read the target protocol layer information of the first uplink data packet to be sent;

Determine first transmission time information according to the target protocol layer information of the first uplink data packet;

Send the first uplink data packet according to the first transmission time information.
The method of claim 1, wherein determining the first transmission time information based on the target protocol layer information of the first uplink data packet includes:

Obtain the first relative time from the target protocol layer information of the first uplink data packet;

Based on the correspondence between relative time and absolute time, the first transmission time information is determined according to the absolute time corresponding to the first relative time.
The method of claim 2, wherein the first transmission time information is an absolute time corresponding to the first relative time.
The method according to claim 2 or 3, characterized in that, the method further includes:

The correspondence between the relative time and the absolute time is obtained from the first control data packet associated with the first uplink data packet.
The method according to claim 4, characterized in that the association between the first uplink data packet and the first control data packet is based on the first uplink data packet and the first control data packet. Determined by the synchronization source identifier carried in respectively.
The method according to claim 4 or 5, characterized in that the first uplink data packet is a real-time transmission protocol RTP data packet, and the first control data packet is a real-time transmission control protocol RTCP data packet.
The method according to any one of claims 1 to 6, characterized in that sending the first uplink data packet according to the first transmission time information includes:

According to the first transmission time information, request transmission resources for transmitting the first uplink data packet from the access network device;

and / or,

Send a second uplink data packet to the access network device, where the second uplink data packet includes the first transmission time information and the first uplink data packet.
The method according to claim 7, characterized in that the header of the second uplink data packet includes the first transmission time information, and the body of the second uplink data packet includes the first uplink data. Bag.
The method according to any one of claims 1 to 8, characterized in that,

The first transmission time information is also used by the access network device to determine the timing of sending the first uplink data packet to the first core network element;

and / or,

The first transmission time information is also used by the first core network element to determine the timing of sending the first uplink data packet to the data network.
The method according to claim 9, characterized in that:

The access network device sends the first uplink data packet to the first core network element;

or,

The access network device sends a second uplink data packet to the first core network element, where the second uplink data packet includes the first transmission time information and the first uplink data packet.
The method according to claim 9 or 10, characterized in that,

The first core network element sends the first uplink data packet to the data network;

or,

The first core network element sends a second uplink data packet to the data network, where the second uplink data packet includes the first transmission time information and the first uplink data packet.
The method according to any one of claims 1 to 11, characterized in that, the method further includes:

Determine whether to enable the transmission synchronization function for the first uplink data packet according to the first information;

Wherein, the first information is used to indicate the service data flow enabling the transmission synchronization function.
The method according to claim 12, characterized in that the first information includes service data flow description information and synchronization indication information; wherein the service data flow description information is used to indicate characteristics of the service data flow, and the synchronization The indication information is used to indicate enabling the transmission synchronization function and/or the type of the target protocol layer.
The method according to claim 12 or 13, characterized in that the first information is sent to the terminal device by a second core network element.
The method according to any one of claims 1 to 14, characterized in that the target protocol layer refers to the transport layer or a protocol layer above the transport layer, including at least one of the following: RTP layer, RTCP layer, Hypertext Transfer Protocol HTTP layer, video compression layer.
A data transmission method, characterized in that the method is executed by a first core network element, and the method includes:

Receive the first downlink data packet from the data network;

Read the target protocol layer information of the first downlink data packet;

Determine second transmission time information according to the target protocol layer information of the first downlink data packet;

Send the first downlink data packet according to the second transmission time information.
The method of claim 16, wherein determining the second transmission time information based on the target protocol layer information of the first downlink data packet includes:

Obtain the second relative time from the target protocol layer information of the first downlink data packet;

Based on the correspondence between relative time and absolute time, the second transmission time information is determined according to the absolute time corresponding to the second relative time.
The method of claim 17, wherein the second transmission time information is an absolute time corresponding to the second relative time.
The method according to claim 17 or 18, characterized in that the method further includes:

The correspondence between the relative time and the absolute time is obtained from the second control data packet associated with the first downlink data packet.
The method according to claim 19, characterized in that the association between the first downlink data packet and the second control data packet is based on the first downlink data packet and the second control data packet. The synchronization source identifier carried in the data packet is determined.
The method according to claim 19 or 20, characterized in that the first downlink data packet is a real-time transmission protocol RTP data packet, and the second control data packet is a real-time transmission control protocol RTCP data packet.
The method according to any one of claims 16 to 21, wherein sending the first downlink data packet according to the second transmission time information includes:

Send a second downlink data packet to the access network device, where the second downlink data packet includes the second transmission time information and the first downlink data packet.
The method according to claim 22, characterized in that the header of the second downlink data packet includes the second transmission time information, and the body of the second downlink data packet includes the first downlink data packet. data pack.
The method according to any one of claims 16 to 23, characterized in that the second transmission time information is also used by the access network device to determine the transmission resource allocation corresponding to the first downlink data packet.
The method according to claim 24, characterized in that:

The access network device sends the first downlink data packet to the terminal device;

or,

The access network device sends a second downlink data packet to the terminal device, where the second downlink data packet includes the second transmission time information and the first downlink data packet.
The method according to any one of claims 1 to 25, characterized in that the method further includes:

Determine whether to enable the transmission synchronization function for the first downlink data packet according to the second information;

Wherein, the second information is used to indicate the service data flow enabling the transmission synchronization function.
The method according to claim 26, characterized in that the second information includes service data flow description information and synchronization indication information; wherein the service data flow description information is used to indicate characteristics of the service data flow, and the synchronization The indication information is used to indicate enabling the transmission synchronization function and/or the type of the target protocol layer.
The method according to claim 26 or 27, characterized in that the second information is sent to the first core network element by a second core network element.
The method according to any one of claims 16 to 28, wherein the target protocol layer refers to a transport layer or a protocol layer above the transport layer, including at least one of the following: RTP layer, RTCP layer, Hypertext Transfer Protocol HTTP layer, video compression layer.
A wireless communication method, characterized in that the method is executed by a second core network element, and the method includes:

Send configuration information to the terminal device and/or the first core network element, where the configuration information is used to indicate the service data flow enabling the transmission synchronization function.
The method according to claim 30, characterized in that sending configuration information to the terminal device and/or the first core network element includes:

Send first information to the terminal device, where the first information is used to indicate enabling the uplink service data flow of the transmission synchronization function;

and / or,

Send second information to the first core network element, where the second information is used to indicate enabling the downlink service data flow of the transmission synchronization function.
The method according to claim 30 or 31, characterized in that the configuration information includes service data flow description information and synchronization instruction information; wherein the service data flow description information is used to indicate the characteristics of the service data flow, and the The synchronization indication information is used to indicate enabling the transmission synchronization function and/or the type of the target protocol layer.
The method according to claim 32, characterized in that the target protocol layer refers to the transport layer or a protocol layer above the transport layer, including at least one of the following: real-time transmission protocol RTP layer, real-time transmission control protocol RTCP layer, Hypertext Transfer Protocol HTTP layer, and video compression layer.
The method according to any one of claims 30 to 33, characterized in that the second core network element is a policy control function network element PCF or a session management function network element SMF.
A data transmission device, characterized in that the device includes:

An information reading module, used to read the target protocol layer information of the first uplink data packet to be sent;

An information determination module, configured to determine the first transmission time information according to the target protocol layer information of the first uplink data packet;

A sending module, configured to send the first uplink data packet according to the first transmission time information.
A data transmission device, characterized in that the device includes:

The receiving module is used to receive the first downlink data packet from the data network;

An information reading module, configured to read the target protocol layer information of the first downlink data packet;

An information determination module, configured to determine the second transmission time information according to the target protocol layer information of the first downlink data packet;

A sending module, configured to send the first downlink data packet according to the second transmission time information.
A wireless communication device, characterized in that the device includes:

A sending module, configured to send configuration information to the terminal device and/or the first core network element, where the configuration information is used to indicate the service data flow enabling the transmission synchronization function.
A communication device, characterized in that the communication device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program to implement the method described in any one of claims 1 to 15 method, or implement the method as described in any one of claims 16 to 29, or implement the method as described in any one of claims 30 to 34.
A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and the computer program is loaded and executed by a processor to implement the method according to any one of claims 1 to 15 , or implement the method as described in any one of claims 16 to 29, or implement the method as described in any one of claims 30 to 34.
A chip, characterized in that the chip includes programmable logic circuits and/or program instructions, and when the chip is run, it is used to implement the method as described in any one of claims 1 to 15, or to implement the method as claimed in claim 1 The method of any one of claims 16 to 29, or the method of any one of claims 30 to 34.
A computer program product, characterized in that the computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads and executes the computer instructions from the computer-readable storage medium , to implement the method as described in any one of claims 1 to 15, or to implement the method as described in any one of claims 16 to 29, or to implement the method as described in any one of claims 30 to 34.