WO2021259112A1

WO2021259112A1 - Service transmission method and apparatus

Info

Publication number: WO2021259112A1
Application number: PCT/CN2021/100412
Authority: WO
Inventors: 吴可镝; 魏岳军; 杨伟强; 李拟珺
Original assignee: 华为技术有限公司
Priority date: 2020-06-24
Filing date: 2021-06-16
Publication date: 2021-12-30
Also published as: CN113840385A

Abstract

The embodiments of the present application relate to the technical field of communications. Disclosed are a service transmission method and apparatus. The method comprises: acquiring a data stream of a service, and priority information thereof, the priority of the data stream being one of at least two service priorities, wherein the at least two service priorities comprise a first priority and a second priority, and the importance of the first priority is higher than that of the second priority; and according to the priority of the data stream, determining, from at least two frequency bands, a frequency band for transmitting the data stream. In the embodiments of the present application, service data is offloaded, and priority information is given for a data stream, thereby flexibly scheduling each data stream of a service, improving the reliability of service transmission and user satisfaction, and improving the number of satisfied users.

Description

Method and device for service transmission

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 24, 2020, the application number is 202010592684.4, and the application name is "a business transmission method and device", the entire content of which is incorporated into this application by reference .

Technical field

The present invention relates to the field of communication technology, in particular to a service transmission method and device.

Background technique

In the continuous evolution of wireless communication systems, new scenarios will be supported, and different requirements for data transmission will also be put forward. For example, in the fifth generation (5G) communication system, data transmission delays are continuously reduced and transmission capacity is increasing, which further promotes the development of real-time multimedia services. Real-time multimedia services usually require strong real-time interactivity, higher requirements for video resolution and refresh rate, and higher requirements for the real-time and reliability of the network.

However, the wireless channel for communication between devices has instability and volatility. In order to ensure low latency and high reliability of services at the same time, the number of concurrent users that each cell can support is limited, which cannot meet the service requirements of a large number of users.

Therefore, how to support more satisfied users and meet the business needs of more users still needs further research.

Summary of the invention

The embodiment of the application provides a service transmission method and device, which facilitates flexible scheduling of service data streams, effectively improves the reliability of service transmission and user satisfaction, increases the number of satisfied users, and meets the service requirements of more users.

In the first aspect, an embodiment of the present application provides a service transmission method, including:

The first device acquires the data stream of the service and its priority information, the priority of the data stream is one of at least two service priorities, and the at least two service priorities include a first priority and a second priority , The first priority is more important than the second priority;

Determining, by the first device, a frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream;

The first device uses the frequency band used to transmit the data stream to send the data stream; the second device receives the data stream.

The first device, as a sending end device, may include a network device (such as a base station) or a terminal device. As the receiving end device, the second device may include a terminal device or a network device. For example, when the first device is a network device, the second device may be a terminal device; when the first device is a terminal device, the second device may be a network device.

The first device may obtain one or more data streams of the service.

In the service transmission process, multiple associated data streams can be established for the same service. Different data streams have priority information. The first device, as the sender device, can schedule the frequency bands through which each data stream is transmitted according to the priority information. , So as to realize the decentralization of services and flexible scheduling of each data stream, thereby improving the reliability of service transmission and user satisfaction, as well as increasing the number of satisfied users.

In the embodiments of the present application, by designing a service transmission scheme combining service splitting and multi-connection (referring to multi-connection of multiple frequency bands), the synchronous transmission of multiple data streams of the same service is guaranteed from the side of the sending end device. The first device can schedule a data stream with high importance (such as a basic layer data stream) to be transmitted in a frequency band with high reliability, and a data stream with low importance (such as an enhancement layer data stream) to be transmitted in a frequency band with low reliability.

In a possible design, the data stream carries service-related information.

The associated information of the service can be used to indicate that the data stream belongs to the service.

In a possible design, the at least two frequency bands include at least two of the following: sub 6G frequency band, LTE frequency band, millimeter wave high frequency frequency band, or WiFi frequency band. In this design, a dual-connection mode combining low-frequency band and high-frequency band is used to transmit services, which releases resource competition pressure in the low-frequency band and improves the spectrum efficiency of transmission services (such as real-time multimedia services) in the communication system.

For example, the at least two frequency bands include sub 6G frequency band + LTE frequency band, sub 6G frequency band + millimeter wave high frequency frequency band, or sub 6G frequency band + WiFi frequency band, etc.

In a possible design, the determining the frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream includes:

If the priority of the data stream is the first priority, the sub 6G frequency band is preferentially used to transmit the data stream; or if the priority of the data stream is the second priority, the The data stream is transmitted in the millimeter wave high frequency band or the WiFi band.

In a possible design, if the priority of the data stream is the first priority, the determining the frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream further includes :

The backup data of the data stream is transmitted using the link of the millimeter wave high-frequency frequency band or the WiFi frequency band.

In a possible design, if the priority of the data stream is the first priority, the transmission resources of the sub 6G frequency band link do not satisfy the transmission of the data stream, and the Priority determining the frequency band used for transmitting the data stream in at least two frequency bands includes:

Use the millimeter wave high-frequency band or WiFi band link to transmit the data stream; or

The first part of the data stream is transmitted using the sub 6G frequency band link, and the second part of the data stream is transmitted using the millimeter wave high frequency band or WiFi frequency band link, the second part The data is the data transmitted in the first data stream that does not use the link of the sub 6G frequency band.

In a possible design, after determining the frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream, the method further includes:

Determine the first transmission block size according to the channel status of the frequency band used for transmitting the data stream, and send the data in the data stream according to the first transmission block size.

In a possible design, the determining the first transmission block size according to the channel status of the frequency band used to transmit the data stream, and sending the data in the data stream according to the first transmission block size includes :

The PDCP layer of the Packet Data Convergence Protocol determines the first transmission block size according to the channel status of the frequency band used to transmit the data stream, and groups the data in the data stream according to the first transmission block size to obtain one or more PDCP PDU; the radio link control RLC layer and the medium access control MAC layer sequentially process the one or more PDCP PDUs, and schedule the obtained data packet of the first transmission block size to be used for transmitting the data Physical layer transmission of the frequency band of the stream.

In this design, on the basis of the service transmission method combining service splitting and multi-connection, the coding layer can also be introduced to realize the simultaneous transmission of multiple data streams in multiple underlying connections, realizing more flexible and precise scheduling .

In one possible design, it also includes:

For data packets in at least two data streams of the service that are sent at the same time, the same timer is configured, and the timer is used to discard the data packet after the timer of the data packet expires.

In a possible design, the acquiring service data flow and its priority information includes:

Receive a downlink data stream from a core network device, where the downlink data stream includes the data stream of the service and its priority information.

If the first device is a base station, the first device may obtain the data stream of the service from the core network device.

Obtain an uplink data stream from a high-level protocol layer or a session protocol layer, and the uplink data stream includes the data stream of the service and its priority information.

If the first device is a terminal device, the first device may generate the data stream of the service by itself, or the first device may obtain the data stream of the service from the application layer device.

In the second aspect, an embodiment of the present application provides a service transmission method, including:

The base station obtains the data stream of the service and its priority information from the core network equipment, the priority of the data stream is one of at least two service priorities, and the at least two service priorities include a first priority and a second priority. Second priority, the first priority is more important than the second priority;

The base station determines the frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream.

For example, the base station may obtain the basic flow (i.e., basic layer data flow) and enhanced flow (i.e., enhanced layer data flow) of the service from the core network equipment, and the priority information of the basic flow is the first priority. The priority information of the enhanced stream is the second priority. The base station may use a frequency band with higher reliability to transmit the basic stream, and a frequency band with lower reliability to transmit the enhanced stream.

In a possible design, the data stream carries service-related information.

Taking the above as an example, the elementary stream carries first associated information, and the enhanced stream carries second associated information. If the first associated information and the second associated information are the same, the elementary stream is determined If it belongs to the same service as the enhanced stream, the base station may simultaneously send the basic stream and the enhanced stream for the received basic stream and the enhanced stream that belong to the same service.

In a possible design, the at least two frequency bands include at least two of the following: sub 6G frequency band, LTE frequency band, millimeter wave high frequency frequency band, or WiFi frequency band.

Taking the above as an example, the priority of the elementary stream is the first priority, the priority of the enhanced stream is the second priority, and the base station preferentially uses the sub 6G frequency band to transmit the elementary stream, using all The enhanced stream is transmitted in the millimeter wave high-frequency frequency band or the WiFi frequency band.

Taking the above as an example, the base station may also use the millimeter wave high-frequency band or WiFi band link to transmit the backup data of the elementary stream.

In one possible design, it also includes:

In the third aspect, the embodiments of the present application provide a service transmission method and device, including:

The terminal device obtains the service data stream and its priority information from the high-level protocol layer or the session protocol layer. The priority of the data stream is one of at least two service priorities, and the at least two service priorities include the first A priority and a second priority, where the first priority is more important than the second priority;

The frequency band used for transmitting the data stream is determined in at least two frequency bands according to the priority of the data stream.

For example, the terminal device may obtain the basic stream (ie, the basic layer data stream) and the enhanced stream (ie, the enhanced layer data stream) of the service, the priority information of the basic stream is the first priority, and the priority of the enhanced stream is The level information is the second priority. The terminal device may use a frequency band with higher reliability to transmit the basic stream, and a frequency band with lower reliability to transmit the enhanced stream.

In a possible design, the data stream carries service-related information.

In a possible design, the first transmission block size is determined according to the channel state of the frequency band used to transmit the data stream, and the data in the data stream is encoded into data of the first transmission block size The package to be sent includes:

In one possible design, it also includes:

Sending a scheduling request by the terminal device, and the scheduling request is used to request to send a data stream of the service;

The terminal device receives scheduling signaling, where the scheduling signaling is used to indicate that the data stream is allowed to be sent or is used to indicate that the data stream is not allowed to be sent;

If the scheduling signaling is used to indicate that the data stream is allowed to be sent, the terminal device uses the frequency band used for transmitting the data stream to transmit the data stream.

Optionally, the scheduling signaling may further include priority information of the data stream, and when the scheduling signaling is used to indicate permission to send the data stream, it may also indicate the frequency band used for transmitting the data stream. , The terminal device transmits the data stream according to the frequency band indicated by the scheduling signaling.

For example, the network device may receive the scheduling request, determine the frequency band used to transmit the data stream according to the priority information of the data stream included in the scheduling request, and send scheduling signaling to the terminal device, so The scheduling signaling is used to indicate that the data stream is allowed to be sent, and is used to indicate a frequency band for sending the data stream.

In a fourth aspect, an embodiment of the present application provides a device, which may be a network device or a terminal device, or may also be a semiconductor chip set in the network device or the terminal device. The device has the function of realizing various possible implementation manners of the above-mentioned first aspect, second aspect, and third aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In a fifth aspect, an apparatus of an embodiment of the present application includes: a processor and a memory; the memory is used to store computer-executable instructions. When the apparatus is running, the processor executes the computer-executable instructions stored in the memory to make the The apparatus executes the method as described in any one of the first aspect or the first aspect, or causes the apparatus to execute the method executed by the base station as described in any of the second aspect or the second aspect, or causes the The apparatus executes the method executed by the terminal device as described in the third aspect or any one of the third aspects.

In a sixth aspect, an embodiment of the present application also provides a communication system, which includes the above-mentioned first device and the above-mentioned second device.

Exemplarily, the communication system includes a network device and a terminal device.

In a seventh aspect, the embodiments of the present application also provide a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause the computer to execute the methods described in the foregoing aspects.

In an eighth aspect, the embodiments of the present application also provide a computer program product including instructions, which when run on a computer, cause the computer to execute the methods described in the foregoing aspects.

These and other aspects of the present application will be more concise and understandable in the description of the following embodiments.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a possible communication system to which an embodiment of this application is applicable;

FIG. 2 is a protocol layer structure of a RAN device applicable to an embodiment of this application;

FIG. 3 is a schematic diagram of a communication architecture of a terminal device and a network device applicable to an embodiment of this application;

FIG. 4a is a schematic diagram of a communication process between a terminal device and a network device applicable to an embodiment of this application;

Figure 4b is a schematic diagram of a service transmission process applicable to an embodiment of this application;

Figure 4c is a schematic diagram of a service transmission process applicable to an embodiment of this application;

FIG. 5 is a schematic diagram of a service transmission process applicable to an embodiment of this application;

FIG. 6 is a schematic diagram of a service transmission process applicable to an embodiment of this application;

FIG. 7 is a schematic diagram of a service transmission process applicable to an embodiment of this application;

FIG. 8 is a schematic diagram of a service transmission process applicable to an embodiment of this application;

FIG. 9 is a schematic structural diagram of a service transmission device applicable to an embodiment of this application;

FIG. 10 is a schematic structural diagram of a service transmission device to which an embodiment of this application is applicable.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

FIG. 1 is a schematic diagram of a network architecture to which an embodiment of this application is applicable. As shown in Figure 1, a terminal device can access a wireless network to obtain services from an external network (such as a data network (DN)) through the wireless network, or communicate with other devices through the wireless network, such as other terminals Device communication. The wireless network includes radio access network (RAN) and core network (CN). Among them, RAN is used to connect terminal equipment to the wireless network, and CN is used to manage terminal equipment and provide Gateway for DN communication.

The terminal equipment, RAN, CN, and DN involved in Fig. 1 are respectively described in detail below.

1. The terminal device is responsible for the transmission of data on the wireless interface, including the upper protocol layer such as the application layer.

The terminal device includes a device that provides voice and/or data connectivity to the user, for example, it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit, subscriber station (subscriber) station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, mobile devices with built-in computers, and so on. For example, personal communication service (PCS) phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (personal digital assistant, PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

2. RAN is responsible for the transmission of data on the wireless interface.

One or more RAN devices may be included in the RAN. The interface between the RAN device and the terminal device may be a Uu interface (or called an air interface). Of course, in future communications, the names of these interfaces may not change or may be replaced by other names, which is not limited in this application.

The RAN device is a node or device that connects a terminal device to a wireless network, and the RAN device can also be called a network device or a base station. Examples of RAN equipment include but are not limited to: a new generation Node B (gNB) in a 5G communication system, an evolved node B (evolved node B, eNB), a radio network controller (RNC), and a node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand) unit, BBU), transmission and receiving point (transmitting and receiving point, TRP), transmitting point (TP), mobile switching center, etc.

The RAN device may include a protocol layer structure, as shown in Figure 2. For example, the control plane protocol layer structure may include the RRC layer, the packet data convergence protocol (packet data convergence protocol, PDCP) layer, and the radio link control (radio link control). Functions of protocol layers such as RLC layer, media access control (MAC) layer, and physical layer; the user plane protocol layer structure can include the functions of the PDCP layer, RLC layer, MAC layer, and physical layer. In a possible implementation, the PDCP layer may also include a service data adaptation protocol (SDAP) layer.

3. CN

The CN may include one or more CN devices. Taking a 5G communication system as an example, the CN may include access and mobility management function (AMF) network elements, session management function (session management function, SMF). ) Network element, user plane function (UPF) network element, policy control function (PCF) network element, unified data management (UDM) network element, application function (AF) ) Network elements, etc.

The AMF network element is a control plane network element provided by the operator's network. It is responsible for the access control and mobility management of terminal equipment accessing the operator's network. For example, it includes functions such as mobile status management, assigning user temporary identities, authenticating and authorizing users, etc. .

The SMF network element is a control plane network element provided by the operator network, and is responsible for managing the protocol data unit (protocol data unit, PDU) session of the terminal device. The PDU session is a channel used to transmit PDUs, and the terminal device needs to transmit PDUs to each other through the PDU session and the DN. The SMF network element is responsible for establishing, maintaining, and deleting PDU sessions. SMF network elements include session management (such as session establishment, modification and release, including tunnel maintenance between UPF and RAN), UPF network element selection and control, service and session continuity (service and session continuity, SSC) mode selection, Session-related functions such as roaming.

The UPF network element is a gateway provided by the operator and a gateway for the communication between the operator's network and the DN. UPF network elements include user plane-related functions such as packet routing and transmission, packet inspection, service usage reporting, quality of service (QoS) processing, lawful monitoring, uplink packet inspection, and downlink packet storage.

The PCF network element is a control plane function provided by the operator and is used to provide a PDU session strategy to the SMF network element. Policies can include charging-related policies, QoS-related policies, and authorization-related policies.

The UDM network element is a control plane network element provided by the operator, and is responsible for storing subscriber permanent identifier (SUPI), security context (security context), subscription data and other information of subscribers in the operator's network.

The AF network element is a functional network element that provides various business services, and can interact with the core network through other network elements, and can interact with the policy management framework for policy management.

In addition, although not shown, the CN may also include other possible network elements, such as network exposure function (NEF), unified data repository (UDR) network elements, and NEF network elements are used for Provides framework, authentication and interfaces related to network capability opening, and transfers information between 5G system network functions and other network functions; UDR network elements are mainly used to store user-related subscription data, policy data, and open structured data , Application data.

4. DN

A DN can also be called a packet data network (PDN), which is a network located outside the operator’s network. The operator’s network can be connected to multiple DNs, and application servers corresponding to multiple services can be deployed in the DN. The terminal device provides a variety of possible services.

In Figure 1, Npcf, Nudm, Naf, Namf, Nsmf, N1, N2, N3, N4, and N6 are interface serial numbers. The meaning of these interface serial numbers can be referred to the meaning defined in the relevant standard protocol, and there is no restriction here.

It is understandable that, in FIG. 1, a 5G communication system (for example, a new radio (NR) system) is taken as an example for illustration, and the solution in the embodiment of this application can also be applied to other possible traditional communication systems. And/or satellite communication system. For example, other possible traditional communication systems can also be fourth-generation (4th Generation, 4G) communication systems (for example, long-term evolution (LTE) systems), worldwide interoperability for microwave access, WiMAX) communication systems, and future communication systems, etc. The satellite communication system can be integrated with the above-mentioned communication system to provide services for users. The aforementioned network elements or functions may be network elements in hardware devices, software functions running on dedicated hardware, or virtualization functions instantiated on a platform (for example, a cloud platform). Optionally, the foregoing network element or function may be implemented by one device, or jointly implemented by multiple devices, or may be a functional module in one device, which is not specifically limited in the embodiment of the present application.

The following first explains some terms used in the embodiments of the present application. It should be noted that these explanations are for making the embodiments of the present application easier to understand, and should not be regarded as limiting the scope of protection required by the present application.

1) Real-time multimedia services, which can provide real-time transmission of service data such as images, sounds, and texts. Real-time multimedia services include the following services: extended reality (XR) services, real-time communications (real-time communications) services, cloud games, etc. Among them, XR business is a business based on XR technology. XR technology can use computer technology and wearable devices to generate a combination of real and virtual, human-computer interaction environments. XR technology includes virtual reality (virtual reality, VR) technology, augmented reality (augmented reality, AR) technology, and mixed reality (MR) technology. XR technology is used in entertainment, gaming, medical, advertising, industry, online education and other fields.

Real-time multimedia services require strong real-time interactivity to provide users with an excellent experience. Especially for video business scenarios such as large-scale live games and remote surgery. Video business scenarios have the characteristics of strong interactivity, large data volume, and high real-time performance. They have higher requirements for video resolution and refresh rate, which imposes lower demands on the network. Time delay, high reliability, and high speed put forward higher requirements.

However, the wireless channel between the terminal and the network device has instability and volatility. If you want to ensure low latency and high reliability at the same time, it will cause a great waste of air interface transmission efficiency, and the number of (concurrent) users that can be supported is also limited. Taking Cloud VR/Gaming services as an example, when transmitting 4K resolution (Ultra HD resolution) video, the average bit rate of the source is about 35 megabits per second (million bits per second, Mbps) At the time, the air interface guarantee rate is 100Mbps, the time delay does not exceed 10 milliseconds (ms), and the air interface packet loss rate is less than one ten thousandth. According to the simulation results, a 100M bandwidth 5G cell can support only 3 satisfied users, that is, only 3 users can meet the above requirements when using Cloud VR/Gaming services. Therefore, the embodiment of the present application provides a service transmission method to support a larger number of satisfied users and meet the service requirements of more users.

2) Frequency band refers to the frequency range of electromagnetic waves, in hertz (Hz). 3GPP defines two types of frequency ranges. The frequency range (frequency range, FR) 1 corresponds to the specific frequency range from 450MHz to 6000MHz, which can be regarded as defining the low frequency part used by 5G. The specific frequency range corresponding to FR2 includes 24250MHz to 5260MHz. Think of it as defining the high frequency part of 5G usage. As shown in Figure 3, terminal equipment and network equipment can communicate in a low frequency band and/or a high frequency band.

For example, the frequency bands involved in this application include one or more of the following frequency bands: sub 6G frequency band, LTE frequency band, millimeter wave (mmWave) high frequency frequency band, or WiFi frequency band.

The sub 6G frequency band refers to electromagnetic waves with a frequency lower than 6 GHz, and the sub 6G frequency band generally uses the frequency band of 450 MHz to 6000 MHz for communication. The millimeter wave high frequency frequency band is electromagnetic waves with frequencies between 30 GHz and 300 GHz, and the millimeter wave high frequency frequency band generally uses the frequency band of 24 GHz-100 GHz for communication. At present, the use of millimeter waves in 5G communication systems is mostly concentrated in the frequency bands of 24 GHz, 28 GHz, 39 GHz, and 60 GHz. The bandwidth of the millimeter broadcasting high-frequency band can reach 800MHz, which can support more users. WiFi frequency bands generally use 2.4GHz and 5GHz frequency bands for communication.

Among them, the sub 6G frequency band can be regarded as a low frequency frequency band, and the millimeter wave high frequency frequency band and WiFi frequency band can be regarded as a high frequency frequency band. Although the high-frequency frequency band can support more users, the transmission of the high-frequency frequency band is more susceptible to interference (such as shelter from leaves, human body and vehicle cover, etc.), and data transmission is easily interrupted. Therefore, the high frequency band of millimeter wave and WiFi frequency band The reliability is lower than that of the sub 6G frequency band.

3) User plane protocol layer structure. In the network architecture shown in Figure 1, the user plane data transmission channel can be established for the terminal device through the control plane signaling interaction process (such as the PDU session establishment process), and then the terminal device and DN can be deployed The application server can transmit data through the user plane data transmission channel. For example, the application server can send a downlink data packet to the terminal device, and the transmission path of the downlink data packet is: application server→UPF network element→network device→terminal device; correspondingly, the terminal device can send an uplink data packet and uplink data to the application server The transmission path of the packet is: terminal device → network device → UPF network element → application server.

Exemplarily, referring to FIG. 4a, the protocol layer structure between the terminal device and the network device may include the SDAP layer, the PDCP layer, the RLC layer, the MAC layer, and the physical layer (PHY layer). Among them, the SDAP layer, the PDCP layer, The RLC layer, MAC layer, and physical layer can also be collectively referred to as the access layer. According to the transmission direction of the data, it is divided into sending or receiving, and each of the above-mentioned layers is further divided into a sending part and a receiving part. Take the following row data transmission as an example. Refer to Figure 4a for a schematic diagram of downlink data transmission between layers. In Figure 4a, the downward arrow indicates data transmission, and the upward arrow indicates data reception. After the PDCP layer obtains the data from the upper layer, it transmits the data to the RLC layer and the MAC layer, and then the MAC layer generates a transmission block, and then performs wireless transmission through the physical layer. The data is encapsulated correspondingly in each layer. The data received by a certain layer from the upper layer of the layer is regarded as the service data unit (SDU) of the layer, and after the layer encapsulation, it becomes a PDU, and then is passed to the lower layer. One layer. For example, the data received by the PDCP layer from the upper layer is called PDCP SDU, the data sent by the PDCP layer to the lower layer is called PDCP PDU; the data received by the RLC layer from the upper layer is called RLC SDU, and the data sent by the RLC layer to the lower layer is called RLC PDU. . In the protocol, the connections between layers are mostly corresponded in the way of channels. The RLC layer and the MAC layer correspond to each other through a logical channel (LCH), and the MAC layer and the physical layer correspond to each other through a transport channel. Below the physical layer is a physical channel, which is used to correspond to the other end. The physical layer.

It should be noted that the network architecture shown in FIG. 1 can be applied to a variety of possible scenarios, such as large-scale live games, remote surgery and other video service scenarios. In these scenarios, as shown in Figure 4b, the terminal device can be connected to one or more application layer devices. The application layer device can include an application layer equivalent to the application layer of the terminal device, and the terminal device can communicate with the application layer device. Communication; the application server can be connected to one or more peripheral devices, which can include input devices and output devices of the application server. In this case, the transmission path of the downlink data packet is: peripheral device → application server → UPF network element → network device → terminal device → application layer device; the transmission path of the uplink data packet is: application layer device → terminal device → network device →UPF network element→application server→peripheral equipment. Taking remote surgery as an example, it is often used for emergency rescue when doctors cannot arrive in time; specifically, doctors can remotely observe the on-site situation of the operation through application-level equipment such as helmets, and send corresponding information through application-level equipment such as gloves. Instructions (can be understood as uplink data packets). After the instructions are transmitted to the surgical site, they are executed by the on-site manipulator. The execution conditions are then converted into signals (can be understood as downlink data packets) through cameras and other medical professional equipment, and transmitted to the doctor’s In the helmet. Refer to Figure 4c, which is a schematic diagram of a data transmission path in a remote surgery scenario.

4) Video frame, a video can be composed of consecutive images (or pictures, photos, etc.) that are played continuously. When 24 images are played quickly in one second, the human eye will think that this is a continuous picture. (I.e. video). Frame rate refers to the number of images played per second. For example, 24 frames means 24 images per second, 60 frames means 60 images per second, and so on. A video frame can be understood as an image (that is, a video frame can include a data packet corresponding to an image). When the frame rate is 60 frames, the duration of a video frame is 1000ms/60Hz, which is approximately equal to 16ms. One video frame may include multiple data packets, and there may be a transmission time interval (gap) between multiple data packets of different video frames.

It should be noted that the video frame involved in the embodiment of the present application may be any one of an I frame, a P frame, and a B frame, or may also be a video frame with other possible names. Among them, I frame, P frame and B frame can be H.264 (that is, the height proposed by the joint video group composed of the Video Coding Expert Group of the International Telecommunication Union Telecommunications Standards Branch and the International Organization for Standardization/International Electrotechnical Commission Dynamic Picture Expert Group. Compressed digital video codec standard) or the three types of frames defined in H.265 or H.266. I frame, also known as intra-frame coded frame, is an independent frame with all its own information. It can be decoded independently without referring to other images. It can be simply understood as a static picture; the first frame in the video sequence is always I frame (I frame is a key frame). P-frame is also called inter-frame prediction coding frame. It needs to refer to the previous I frame to be encoded. It represents the difference between the current frame picture and the previous frame (the previous frame may be an I frame or a P frame). It is required for decoding Use the previously buffered picture to superimpose the difference defined in this frame to generate the final picture. B frame is also called bidirectional predictive coding frame, that is, B frame records the difference between the current frame and the previous frame; that is to say, to decode B frame, not only the previous buffered picture must be obtained, but also the decoded picture after passing through The superposition of the screen and the data of this frame obtains the final screen.

5) Encoding, the source encoder compresses and encodes the video frame. The higher the compression rate of the encoding, the lower the amount of encoded data, and the lower the amount of data to be transmitted. However, a high compression rate will bring about a decline in factors such as picture quality, definition, or frame rate, and affect user experience.

The wireless channel has instability and volatility. If the code rate of the encoder is designed according to the poor quality of the channel fluctuation, then when the quality of the channel fluctuation is good, encoding with a low code rate cannot provide users with a better experience. In this regard, the application layer dynamic bit rate (VBR) can be used, that is, to detect the quality change of the channel, and configure a bit rate compatible with the channel quality to encode the video frame. However, this method requires a certain control convergence time, and the application layer needs to perceive the changes of the underlying channel. The current code rate change time is preferably at the level of 100 milliseconds, which cannot match the wireless air interface transmission with fluctuations of 10 ms.

If redundant packets are added to the upper layer to alleviate air interface packet loss, the increase in high layer redundancy means an increase in the amount of data transmitted on the air interface, which will further reduce the system capacity.

6) Information source, also known as information source, source of information, that is, the producer or publisher of information.

7) Video layered coding. In scenarios such as remote surgery, the clearer the video quality, the better, which puts high demands on the network transmission capacity. On the other hand, the channel quality of the wireless channel fluctuates drastically. Even if the physical location of the terminal device does not change, the wireless signal will temporarily fluctuate sharply. This fluctuation occurs in a short and unpredictable time, so it cannot be adjusted and transmitted. Parameters (such as modulation and coding scheme (MCS)) and other methods enhance robustness. Therefore, if the probability of packet loss in the transmission of data packets increases, once the packet is lost, it needs to be resolved through retransmission. However, the importance of different data packets of the video service can be different. For example, the loss of some data packets will greatly affect the receiving picture, and the loss of some data packets will not have much influence on the receiving picture; The transmission network cannot know the importance of each data packet, so it adopts the "retransmit after packet loss" method for all data packets. Using this method, on the one hand, will cause the data packet to fail to be within the specified delay range. On the other hand, once the packet is lost and the lost packet is an important packet, it will have a great impact on the receiving picture and reduce the user experience.

To solve the above problems, video coding introduces a layered coding method, which can also be called a scalable coding method. This method regards a basic layer (BL) and several enhancement layers (extend layer, EL) as a multi-layer video system. The basic layer provides a bit stream of basic image quality (a bit stream refers to a video file per unit of time). The data stream used, also known as the bit rate), the enhancement layer provides a bit stream that can build a higher image quality on the basis of the basic image quality. In the embodiments of the present application, the base layer code stream can be understood as equivalent to the base layer data stream, referred to as the basic stream (BL stream), and the enhancement layer code stream can be understood as equivalent to the enhancement layer data stream, referred to as the enhanced stream (EL stream). Specifically, the base layer code stream and the enhancement layer code stream are separately decodable sub-code streams, and the enhancement layer code stream may include one or more layers. The basic layer stream can include basic layer data packets, which are a necessary condition for video playback. In this case, the video quality is poor; and the enhancement layer stream can include enhancement layer data packets. Data packets are a supplementary condition for video playback; for example, if the video quality corresponding to the basic layer stream is smooth, then the first enhancement layer stream is superimposed on the basic layer stream to achieve standard definition image quality. Superimposing the second enhancement layer code stream on the basis of high-definition picture quality can achieve high-definition picture quality, and superimposing the third enhancement layer code stream on the basis of high-definition picture quality can reach the Blu-ray picture quality. In other words, the more enhancement layer code streams are superimposed on the base layer code stream, the better the video quality after decoding. It should be noted that the embodiments of the present application will take two layers of the basic layer and the enhancement layer as examples for description, that is, the enhancement layer involved in the embodiments of the present application may include one layer or may also include multiple layers.

In this way, after the introduction of the video layered coding method, for a video frame, the encoded output data packet can be divided into two paths: one is the base layer data packet, and the other is the enhancement layer data packet. Correspondingly, the transmission network can learn the two layers of data, and then can distinguish between the following two aspects: (1) Retransmission: For the basic layer data packet, a transmission is unsuccessful, if time permits, then retransmission, if the time is not If allowed, no retransmission; for the enhancement layer data, no retransmission. (2) New transmission: Priority is given to the new transmission of basic layer data packets. For example, two users have new data packets to be transmitted at the same time. One user is a basic layer data packet and the other user is an enhanced layer data packet. Transmit basic layer data packets or use a more reliable method to transmit basic layer data packets.

At present, the source uses the video layered coding technology, and then sends the basic stream and the enhanced stream to the receiving end. Therefore, compared to only compressing and coding the original video, the video layered coding technology will bring an additional 10%~ 20% throughput loss, so when the transmission resources of the wireless channel are limited or unstable, the video layered coding technology may not be able to support more satisfactory users.

Based on this, the embodiments of the present application can provide a service transmission method, which is used to improve user satisfaction and the number of satisfied users, and meet the service requirements of more users. The method includes: a first device acquires a data stream of a service and priority information thereof, the priority of the data stream is one of at least two service priorities, and the at least two service priorities include a first priority and The second priority, the first priority is more important than the second priority; the receiving end device determines the data stream in at least two frequency bands according to the priority of the data stream Frequency band. Through this method, multiple associated data streams can be established for the same service, and different data streams correspond to priority information. The first device as the sender device can schedule the frequency bands through which each data stream is transmitted according to the priority information, thereby Realize business diversion and flexible scheduling of each data stream, thereby improving the reliability of business transmission and user satisfaction, as well as increasing the number of satisfied users.

The service transmission method provided in the embodiments of the present application can be applied to a multi-user-oriented broadcast/multicast transmission scenario, or can be applied to a point-to-point unicast transmission scenario. The following describes the service transmission process provided by the embodiment of the present application. As shown in FIG. 5, the process includes:

S501: The first device obtains the data stream of the service and its priority information, where the priority of the data stream is one of at least two service priorities, and the at least two service priorities include a first priority and a second priority. Priority, the first priority is more important than the second priority.

The first device may be regarded as a sending end device. For example, the first device may include a network device (such as a base station) and/or a terminal device.

The data stream of the service acquired by the first device may be one or more data streams from the same service, or may be multiple data streams from different services. Among them, multiple data streams from the same service are associated, and multiple data streams from different services may or may not be associated. Exemplarily, if multiple data streams belong to the same service, it can be understood that the multiple data streams are from the same application, or it can be understood that the multiple data streams belong to the same session. The session is a session created in an application program, and an application program usually includes one or more sessions. If multiple data streams belong to different services, it can be understood that the multiple data streams come from different applications, or it can be understood that the multiple data streams belong to different sessions. The different sessions may correspond to one application program, or may respectively correspond to different application programs.

The data stream involved in the embodiments of the present application may include one or more of a video data stream, an audio data stream, or a text data stream. In the embodiment of this application, the data stream includes a video data stream and/or an audio data stream as an example to describe the service transmission process. The service transmission process of the text data stream is similar and will not be repeated in the embodiment of this application. .

The data flow of the service may include a basic flow and (one or more layers) enhanced flow. For example, for a video data stream, the basic stream can include I frames, and the enhanced stream can include P frames and/or B frames. For audio data streams, the basic stream can include a certain mono audio data, and the enhanced stream can Including audio data of other channels, or the elementary stream can include audio data of human voice, and the enhanced stream can include audio data of background sound, etc.; for a mixed audio and video data stream, the elementary stream can include audio data stream and video data stream The enhanced stream can include the enhanced stream of the video data stream, or the basic stream can include the elementary stream of the audio data stream and the elementary stream of the video data stream, and the enhanced stream can include the enhanced stream of the audio data stream and the enhanced stream of the video data stream. Flow and so on. There is an association relationship between data streams for the same service, that is, for a service, the basic stream and the enhanced stream of the service are associated, that is, the basic stream and the enhanced stream that have an association relationship belong to the same service. For example, the basic stream may correspond to a first priority, and the enhanced stream may correspond to a second priority. The enhanced stream depends on the basic stream. If the transmission of the basic stream fails, the corresponding enhanced stream cannot be restored. Therefore, setting the priority importance of the basic stream to be higher, and setting the priority importance of the enhanced stream to be lower, can ensure a high-quality user experience. For another example, the basic stream may correspond to a second priority, and the enhanced stream may correspond to a first priority.

The priority information of the data stream can be understood as the importance or degree of importance of the data stream.

Exemplarily, the at least two service priorities include a high priority and a low priority, the high priority is the first priority, and the low priority is the second priority; or the at least two services Priorities include priority 1, priority 2, priority 3, etc. The priority 1 is the first priority, the priority 2 is the second priority, and the priority 3 is the third priority, etc., The second priority is higher in importance than the third priority; or the at least two service priorities include priority A, priority B, priority C, etc., and the priority A is the first priority , The priority B is the second priority, the priority C is the third priority, etc., and the second priority is more important than the third priority.

It is understandable that, in S501, the first device may obtain one or more data streams of the service for one service, and obtain priority information of each data stream. If the first device obtains multiple data streams of a service, each of the data streams also carries associated information related to the service, and the associated information related to the service is used to indicate that the data stream belongs to the For services, when the processing resources of the first device are sufficient, the first device can also process the multiple data streams synchronously according to the association relationship. When the channel link quality is more reliable, the first device The device may also send the multiple data streams simultaneously according to the association information.

In an example, each data stream carries priority information of each data stream. For example, the first device obtains data stream 1, and the data stream 1 carries the priority of the data stream 1. Level information. In another example, each data stream and the priority information of each data stream may be carried in different fields of a message. For example, if the first device obtains the first message, the first message It includes a first field and a second field. The first field includes data stream 1, and the second field includes priority information of the data stream 1. In another example, each data stream and the priority information of each data stream may be carried in different messages. For example, the first device obtains the first message and the second message, and the first device obtains the first message and the second message. The message includes data stream 1, the second message includes priority information of the data stream 1, wherein the first message is associated with the second message, for example, the first message and the second message both include The identification information of the data stream 1.

If the first device is a network device, taking the network device as a base station as an example, in S501, the first device receives a downlink data stream from a core network device, and the downlink data stream includes information about the service The data flow and its priority information, that is, the first device can obtain the service data flow and its priority information in the core network device. For example, the application server serves as a source, provides service data and performs layered coding on the service data to obtain basic layer data and enhancement layer data, and the application server sends the basic layer data and the enhancement layer data to the core Network equipment, the core network equipment may establish a bearer 1 corresponding to the basic layer data, and transmit the basic stream (the basic stream includes the basic layer data) to the air interface of the base station through the bearer 1, and The core network device may establish a bearer 2 corresponding to the enhancement layer data, and transmit an enhancement stream (the enhancement stream includes the enhancement layer data) to the air interface of the base station through the bearer 2. Optionally, the application server may carry priority information of the basic layer data in the basic layer data, and/or carry priority information of the enhancement layer data in the enhancement layer data, corresponding , The elementary stream carries the priority information of the elementary stream, and/or the enhanced stream carries the priority information of the enhanced stream.

If the first device is a terminal device, in S501, the first device obtains an uplink data stream from a high-level protocol layer (such as a session protocol layer, a presentation protocol layer, or an application protocol layer) or a session protocol layer, and the uplink data The stream includes the data stream of the service and its priority information. For example, the user operates the first device, and the first device generates a data stream of the service. Optionally, the first device may store a priority information determination strategy, and the first device may determine Strategy to determine the priority information of the data stream, such as for video service data, determine I frame as the first priority corresponding to the basic stream data, and determine the P frame and B frame as the second priority corresponding to the enhanced stream . As another example, the first device can obtain the data stream of the service in the application layer device (as shown in FIG. 4c), and the application layer device generates service data and performs layered coding on the service data to obtain Basic layer data and enhancement layer data. The application layer device determines the basic stream corresponding to the basic layer and determines the enhancement stream corresponding to the enhancement layer data. Optionally, the basic stream sent by the application layer device The priority information of the basic stream may be carried in the elementary stream, the priority information of the enhanced stream may be carried in the enhanced stream, or the priority information of the received data stream may be determined by the first device.

S502: The first device determines a frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream.

The first device supports communication on at least two frequency bands, and the at least two frequency bands may be located in a communication frequency band range defined by a wireless communication system (such as the aforementioned communication system such as a 4G communication system or a 5G communication system, or a WiFi communication scenario) Inside. For example, the at least two frequency bands include at least two of the following: sub 6G frequency band, LTE frequency band, millimeter wave high frequency frequency band, or WiFi frequency band.

Optionally, before S502, a strategy for determining a frequency band used to transmit the data stream may be preset in the first device. The determination strategy may be pre-configured into the first device by a device user or maintenance personnel, or may be pre-configured into the first device by a high-level network element. For example, the determination strategy may specify that a frequency band with high reliability is used to transmit data streams with high priority importance, and a frequency band with low reliability is used to transmit data streams with low priority importance. Among them, the frequency band with high reliability can meet one or more of the following conditions: good channel connection, sufficient transmission resources, or not easy to be interfered. Generally, the channel connection status of the sub 6G frequency band is good and it is not easy to be interfered. The channel connection status of the millimeter wave high frequency band or WiFi frequency band is poor and easy to be interfered; whether the transmission resources of the frequency band are sufficient and the frequency band is currently transmitting Business related. Or alternatively, the first device may acquire the frequency band used to transmit the data stream while acquiring the data stream of the service and its priority information. Indicates the frequency band for transmitting the data stream. For another example, the determination strategy may be to correspond the priority to the frequency band of transmission, for example, one or more high priorities correspond to a frequency band with high reliability, and one or more low priorities correspond to a frequency band with low reliability.

In an example, the first device obtains a data stream of the service, and in this S502:

If the priority of the data stream is the first priority, the first device may determine the sub 6G frequency band as a frequency band for transmitting the data stream. Optionally, the first device may also determine the millimeter wave high-frequency frequency band or the WiFi frequency band as a frequency band for transmitting the backup data of the data stream, so as to improve the reliability of data stream transmission. Optionally, if the link transmission resources of the sub 6G frequency band do not satisfy the transmission of the data stream, the first device may also determine the millimeter wave high-frequency frequency band or the WiFi frequency band as used for transmitting the data The frequency band of the stream; or the first device may determine the sub 6G frequency band, the millimeter wave high-frequency frequency band or the WiFi frequency band as the frequency band used to transmit the data stream.

If the priority of the data stream is the second priority, the first device may determine the millimeter wave high-frequency frequency band or the WiFi frequency band as the frequency band for transmitting the data stream. Optionally, if the link transmission resource of the sub 6G frequency band satisfies the transmission of the data stream, the first device may also determine the sub 6G frequency band as a frequency band for transmitting the data stream.

In another example, the first device acquires multiple data streams of the service. For example, the multiple data streams include at least a first data stream and a second data stream. In this S502:

If the priority of the first data stream is the first priority and the priority of the second data stream is the second priority, the first device may determine the sub 6G frequency band to be used for transmitting the For the frequency band of the first data stream, the millimeter wave high-frequency frequency band or the WiFi frequency band is determined as the frequency band for transmitting the second data stream.

Optionally, the first device may also determine the millimeter wave high-frequency frequency band or the WiFi frequency band as a frequency band for transmitting the backup data of the first data stream. The first data stream can be sent in both the high-reliability frequency band and the low-reliability frequency band, and the data sent on the low-reliability frequency band is used as its backup.

S503: The first device transmits the data stream through the frequency band used to transmit the data stream; the second device receives the data stream.

Exemplarily, in S503, the first device may transmit the data stream through the transceiver module/radio frequency chip/radio frequency front-end chip in the first device.

Corresponding to S502, in an example, the first device obtains a data stream of the service, and in this S503:

If the priority of the data stream is the first priority, the first device may use the sub 6G frequency band to transmit the data stream, and the second device may use the sub 6G frequency band to receive the data stream. Optionally, the first device may also use the millimeter-wave high-frequency band or WiFi frequency band to transmit the backup data of the data stream, and the second device may use the millimeter-wave high-frequency band or WiFi frequency band to receive the The backup data of the data stream.

Optionally, if the transmission resources of the sub 6G frequency band link do not satisfy the transmission of the data stream, the first device may use the millimeter wave high-frequency frequency band or the WiFi frequency band to transmit the data stream, and the The second device uses the millimeter wave high-frequency band or the WiFi band to receive the data stream; or the first device may use the sub 6G frequency band link to transmit the first part of the data stream, and use the The second part of the data of the data stream is transmitted on the link of the millimeter wave high-frequency band or the WiFi frequency band, and the second part of the data is the data transmitted by the link in the first data stream that does not use the sub 6G frequency band. The second device may use the sub 6G frequency band to receive the first part of the data stream, and use the millimeter wave high frequency frequency band or the WiFi frequency band to receive the second part of the data stream.

If the priority of the data stream is the second priority, the first device may use the millimeter wave high frequency band or the WiFi frequency band to transmit the data stream, and the second device may use the millimeter wave high frequency band. Receiving the data stream in a frequency band or a WiFi frequency band. Optionally, if the transmission resources of the link in the sub 6G frequency band satisfy the transmission of the data stream, the first device may also use the sub 6G frequency band to transmit the data stream, and the second device may use The sub 6G frequency band receives the data stream. It is understandable that even if the transmission resources of the link of the ub 6G frequency band satisfy the transmission of the data stream, the first device may not use the sub 6G frequency band to transmit the data stream, but adopt the millimeter wave. The high-frequency frequency band or WiFi frequency band transmits the data stream, so as to avoid affecting the transmission of other services.

In another example, the first device obtains multiple data streams of the service. For example, the multiple data streams include at least a first data stream and a second data stream. In this S503:

If the priority of the first data stream is the first priority and the priority of the second data stream is the second priority, the first device may use the sub 6G frequency band to transmit the first data stream , Using the millimeter wave high frequency band or WiFi frequency band to transmit the second data stream, the second device may use the sub 6G frequency band to receive the first data stream, using the millimeter wave high frequency frequency band or WiFi The frequency band receives the second data stream. Optionally, the first device may also use the millimeter wave high frequency band or WiFi frequency band to transmit the backup data of the first data stream, and the second device may also use the millimeter wave high frequency band or WiFi frequency band. The frequency band receives the backup data of the first data stream.

The first data stream and the second data stream may also carry associated information, which is used to indicate that the first data stream and the second data stream belong to the same service, and the first device may be based on the Associated information, sending the first data stream and the second data stream at the same time. Wherein the simultaneous sending of the first data stream and the second data stream includes: the time difference between the first time point of sending the first data stream and the second time point of sending the second data stream does not exceed a set time The first time difference, or the total transmission duration required for sending the first data stream and sending the second data stream does not exceed a set transmission duration threshold.

If the first device obtains multiple data streams of the service, the multiple data streams are associated and need to be transmitted at the same time. Take the multiple data streams including at least the first data stream and the second data stream as an example To illustrate, optionally, the first device determines that the received first data stream is associated with the second data stream and needs to be sent at the same time. The first device responds to the data packets in the first data stream and the The data packets in the second data stream are configured with the same timer (such as PDCP Discard timer). When the timer of the first data packet expires, the first data packet has not been transmitted to the second device, and the The first device may discard the first data packet. If the timer of the first data packet does not expire, the first device repeatedly attempts to send the first data packet until the time of the first data packet is reached. The timer expires or the first data packet is transmitted to the second device. Also or alternatively, the core network device may configure a time stamp tag in the data packet, and the first device targets the same or similar time stamps indicated by the time stamp tags in the first data stream and the second data stream. Data packets are sent at the same time, and the time stamps being similar means that the difference between the time stamps corresponding to the two data packets does not exceed the set time stamp difference.

In another possible implementation manner, the first device may also obtain multiple data streams from different services (for example, obtain multiple data streams from service 1 and multiple data streams from service 2), Or, the first device may also obtain multiple data streams of different types from the same service (for example, obtain the audio data stream of service 1 and the video data stream of service 1). The first device may also send important services or important data streams on a frequency band with high reliability. The different services may be related or not. For example, the first device obtains multiple data streams from service 1 and multiple data streams from service 2. If the importance of service 1 is higher than the importance of service 2, the first device can transfer the data stream of service 1 It is transmitted as a basic layer data stream, and the data stream of service 2 is transmitted as an enhanced layer data stream. For another example, the first device obtains the audio data stream and the video data stream from the same service, and the first device may transmit the audio data stream and the base layer of the video data stream as the base layer data stream, And the enhancement layer of the video data stream is transmitted as an enhancement layer data stream. For another example, the first device obtains an audio data stream and a video data stream from the same service, the audio data stream can also be layered coding, and the first device combines the basic layer and the video data stream of the audio data stream. The base layer of the video data stream is transmitted as a base layer data stream, and the enhancement layer of the audio data stream and the enhancement layer of the video data stream are transmitted as an enhancement layer data stream.

If the first device obtains a data stream of the service, in S503, the first device determines the size of the first transmission block according to the channel state of the frequency band used to transmit the data stream, and adds The data is sent according to the size of the first transmission block.

Exemplarily, when the protocol layer of the first device transmits a data stream, the PDCP layer determines the size of the first transmission block according to the channel state of the frequency band used to transmit the data stream, and compares the size of the first transmission block according to the first transmission block size. The data in the data stream is grouped to obtain one or more PDCP protocol data units (protocol data unit, PDU); the RLC layer and the MAC layer sequentially process the one or more PDCP PDUs to obtain the first To transmit the data packet of the size of the transmission block, the obtained data packet of the first transmission block size is scheduled to the physical layer transmission of the frequency band used to transmit the data stream. Among them, PDCP layer, RLC layer and MAC layer can also refer to the description of FIG. 4a for processing data. Optionally, the RLC layer may also group the data in the data stream, for example, encode PDCP PDU to enhance the reliability of the transmitted data.

If the first device acquires multiple data streams of the service, for example, the multiple data streams include at least a first data stream and a second data stream, in S503, the first device is used to transmit the first data stream according to The channel status of the frequency band of a data stream, the second transmission block size is determined, the data in the first data stream is sent according to the second transmission block size, and the frequency band used to transmit the second data stream is sent The third transmission block size is determined, and the data in the second data stream is sent according to the third transmission block size.

Exemplarily, when the protocol layer of the first device transmits the first data stream and the second data stream, the first PDCP layer determines according to the channel state of the frequency band used to transmit the first data stream The second transmission block size is to group the data in the first data stream according to the second transmission block size to obtain one or more first PDCP PDUs; the first RLC layer and the first MAC layer sequentially One or more first PDCP PDUs are processed, and the obtained data packet of the second transmission block size is scheduled to the first physical layer transmission of the frequency band used to transmit the first data stream; and the second PDCP layer is based on The channel status of the frequency band used to transmit the second data stream, the third transmission block size is determined, and the data in the second data stream is grouped according to the third transmission block size to obtain one or more second data streams. PDCP PDU; the second RLC and the second MAC layer sequentially process the one or more second PDCP PDUs, and schedule the obtained data packet of the third transmission block size to be used for transmitting the second data stream The second physical layer transmission of the frequency band. Optionally, the first RLC layer can also group data in the first data stream, and the second RLC layer can also group data in the second data stream, such as the first PDCP PDU and the second PDCP. The PDU is encoded to enhance the reliability of the transmitted data.

Wherein, the first PDCP layer and the second PDCP layer may share an entity, or may be independent entities; the first RLC layer and the second RLC layer may share an entity, or may be independent entities; The first MAC layer and the second MAC layer may share an entity, or may be independent entities; the first physical layer and the second physical layer may share an entity, or may be independent entities.

Before S503, the first device may execute S503 when it is determined to send the data stream of the service. If the first device is a network device, the first device may determine whether to send the data stream according to the priority information of the data stream. If the first device is a terminal device, the first device may determine whether to send the data stream according to the priority information of the data stream, or send a scheduling request (to the network device), and the scheduling request is used for To send a data stream of a service, the scheduling request includes priority information of the data stream, and the network device determines whether to send the data stream according to the priority information of the data stream, and whether to allow the data stream to be sent The indication information of is notified to the first device through scheduling signaling, and the first device receives the scheduling signaling, and determines whether to send the data stream according to the indication information in the scheduling signaling. Optionally, when the network device determines to send the data stream, it may also determine the frequency band for sending the data stream according to the priority information of the data stream, and the scheduling signaling may also include sending the data stream. The frequency band of the stream, and the first device sends the data stream according to the frequency band in which the data stream is sent in the scheduling signaling.

The second device may be regarded as a receiving end device. For example, the second device may include a network device (such as a base station) and/or a terminal device. If the first device is a network device, the second device may be a terminal device; if the first device is a terminal device, the second device may be a network device.

After receiving the data stream, the second device may save the data in the data stream, and/or decode and restore the data stream.

Through the method provided in the embodiments of the present application, during the service transmission process, associated data streams can be established for the same service, and each data stream can be scheduled to be transmitted on the corresponding frequency band according to the priority of different data streams, thereby realizing service splitting and Flexible scheduling of data streams, thereby improving the reliability of service transmission and user satisfaction, as well as increasing the number of user satisfaction. For example, for (real-time) video services, the service data is divided into a basic stream and an enhanced stream, the basic stream is transmitted in the sub 6G frequency band, and the enhanced stream is transmitted in high frequency, that is, the combination of multiple connections (such as sub 6G and high frequency) The dual connection mode) to ensure the high reliability and low delay requirements of the basic layer. The enhancement layer uses high frequency transmission to maintain the same transmission delay requirements as the basic layer. The high and low frequency dual connection coordination helps to improve the measurement of high frequency channels. To further increase the capacity of the communication system, release the resource competition requirements of the low-frequency band, improve the spectrum efficiency of 5G transmission new media services as a whole, and overcome the disadvantages such as the susceptibility of high-frequency bands to obstruction and interruption, and enable high-frequency spectrum The ability to deliver new media services (low-latency and high-reliability services).

The service transmission process will be described below by taking the first device as the base station and the second device as the terminal device as an example. Among them, the service data is coded hierarchically, and the dual connection mode of sub6G frequency band and millimeter wave high frequency frequency band is adopted for downlink service transmission.

Scenario 1, as shown in Figure 6, the MAC layer entities are shared, and there is no interaction delay at the MAC layer (as shown in (a) in Figure 7). Service transmission includes the following processes:

The application server performs video/audio layered coding on the service data to generate basic layer data and enhanced layer data. The application server sends the basic layer data and the enhancement layer data to the core network device.

The core network device establishes a bearer 1 corresponding to the basic layer data, and establishes a bearer 2 corresponding to the enhancement layer data. The core network device uses bearer 1 to send a basic layer data stream (abbreviated as BL stream, including the base layer data), and uses bearer 2 to send an enhancement layer data stream (abbreviated as EL stream, including the enhancement layer data).

The base station receives the BL stream and the EL stream. The base station and the UE perform high and low frequency networking, and establish two physical links in the sub 6G frequency band and the millimeter wave high frequency frequency band.

The base station can dynamically decide which frequency band physical link to use for transmission of the BL stream and the EL stream based on the service load and the channel quality of the two physical links.

The first SDAP layer of the base station generates SDAP_BL (data packet) according to the BL flow, the first PDCP layer generates PDCP_BL according to SDAP_BL, the first RLC layer generates RLC_BL according to PDCP_BL, the first RLC layer sends RLC_BL to the MAC layer, and the MAC layer will The BL flow is scheduled to the physical layer transmission of the sub 6G frequency band to form the basic layer transmission block TB_BL, and is transmitted to the UE through the physical link of the sub 6G frequency band. The second SDAP layer of the base station generates SDAP_EL according to the EL flow, the second PDCP layer generates PDCP_EL according to SDAP_EL, the second RLC layer generates RLC_EL according to PDCP_EL, the second RLC layer sends RLC_EL to the MAC layer, and the MAC layer schedules the EL flow to The physical layer transmission in the millimeter-wave high-frequency band forms an enhancement layer data block TB_EL, which is transmitted to the UE through the physical link in the millimeter-wave high-frequency band.

Optionally, if the transmission resources of the sub 6G frequency band are insufficient to transmit the BL stream (that is, if the sub 6G frequency band cannot meet the transmission of the BL stream), or the millimeter wave high frequency band is stable (for example, the millimeter high frequency band is not interfered with) ), both the BL stream and the EL stream can be scheduled to the millimeter wave high-frequency band for transmission.

Optionally, if the transmission resources of the sub 6G frequency band are sufficient to transmit the BL stream and EL stream (that is, if the sub 6G frequency band can meet the transmission of the BL stream and the EL stream), or the millimeter wave high frequency band is interfered, it can be Both the BL stream and the EL stream are scheduled to the sub 6G frequency band for transmission.

In this embodiment, the application server layered coding, core network equipment split transmission, and 5G wireless air interface physical layer high and low frequency dual connections can increase the number of satisfied users, which can be seen in Table 1 below. The service requirements shown in Table 1 are that the time delay should not exceed 5-10ms, and the packet loss rate should not exceed one ten thousandth. When layered coding is not used, the sub 6G frequency band is used to transmit data streams, which can satisfy 3 users. The service requirements of the sub 6G frequency band can meet the service requirements of 6 users when performing hierarchical coding and using the sub 6G frequency band to transmit the data stream; regardless of whether the hierarchical coding is performed, the reliability of the service transmission is the same when only the high frequency frequency band is used to transmit the data stream. There is no guarantee; when sub 6G frequency band + high frequency frequency band is not used for data stream transmission, it can meet the business needs of 3 users. When layered coding is performed, sub 6G frequency band + high frequency frequency band is used to transmit data stream. , Can meet the business needs of 25-30 users. It can be seen that the layered coding + multi-connection service transmission mode proposed in the embodiment of the present application can greatly increase the number of satisfied users and meet the service requirements of more users.

Table 1

In the second scenario, as shown in Figure 8, the MAC layer entities are not set together (as shown in (b) in Figure 7), and there is a 10ms delay in the X2 interface layer 2 (L2) information. The service transmission process of FIG. 8 can be referred to the service transmission process of FIG. 6, and the repetition will not be repeated.

For the MAC layer entities are not set together, the two MAC layers need to exchange information through the X2 interface, and there is a 10ms delay, which cannot meet the transmission requirements of real-time services, and it is difficult to achieve precise scheduling. Therefore, when the MAC layer entities are not set together, a fixed transmission method can be set. For example, the BL stream can be fixedly scheduled to the physical layer transmission of the sub 6G frequency band, and the EL stream can be fixedly scheduled to the physical layer transmission of the millimeter wave high-frequency frequency band. , There is no need to exchange information between two MAC layer entities, so as to avoid time delay in the scheduling process. It is understandable that for a scenario where other protocol layer entities are not set together, you can refer to the second scenario for setting a fixed transmission mode, which will not be repeated here.

The service transmission method of the embodiment of the present application is described in detail above with reference to FIG. 5 to FIG. 8. Based on the same inventive concept of the foregoing service transmission method, the embodiment of the present application also provides a service transmission device, as shown in FIG. The service transmission device 900 includes a processing unit 901 and a transceiver unit 902, and the device 900 can be used to implement the methods described in the foregoing method embodiments. The apparatus 900 may be a network device or a terminal device, or may be in the network device or the terminal device.

The transceiving unit 902 is configured to obtain a data stream of a service and its priority information, the priority of the data stream is one of at least two service priorities, and the at least two service priorities include the first priority And a second priority, where the first priority is more important than the second priority;

The processing unit 901 is configured to determine a frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream.

In an implementation manner, the data stream carries service-related information.

In an implementation manner, the at least two frequency bands include at least two of the following: sub 6G frequency band, LTE frequency band, millimeter wave high frequency frequency band, or WiFi frequency band.

In an implementation manner, the processing unit 901 is specifically configured to, if the priority of the data stream is the first priority, the transceiving unit 902 preferentially uses the sub 6G frequency band to transmit the data stream; Or, if the priority of the data stream is the second priority, the transceiver unit 902 adopts the millimeter wave high frequency band or the WiFi frequency band to transmit the data stream.

In an implementation manner, the processing unit 901 is further configured to, if the priority of the data stream is the first priority, use the link transmission of the millimeter wave high frequency band or the WiFi frequency band through the transceiver unit 902 The backup data of the data stream.

In an implementation manner, the processing unit 901 is further configured to: if the priority of the data stream is the first priority and the transmission resources of the sub 6G frequency band link do not satisfy the transmission of the data stream, pass The transceiver unit 902 uses the link of the millimeter wave high-frequency band or the WiFi frequency band to transmit the data stream; or the transceiver unit 902 uses the link of the sub 6G frequency band to transmit the first part of the data stream , And use the millimeter-wave high-frequency band or WiFi band link to transmit the second part of the data stream through the transceiver unit 902. The second part of the data is the sub Data transmitted by the link in the 6G frequency band.

In an implementation manner, the processing unit 901 is further configured to determine the size of the first transmission block according to the channel status of the frequency band used to transmit the data stream, and transmit the data in the data stream through the transceiving unit 902 The data is sent according to the first transmission block size.

In an implementation manner, the processing unit 901 is specifically configured to determine the size of the first transmission block according to the channel status of the frequency band used to transmit the data stream, and calculate the size of the first transmission block in the data stream according to the first transmission block size. Group the data to obtain one or more PDCP PDUs; process the one or more PDCP PDUs in sequence;

The transceiving unit 902 is specifically configured to schedule the obtained data packet of the first transmission block size to the physical layer transmission of the frequency band used to transmit the data stream.

In an implementation manner, the processing unit 901 is further configured to configure the same timer for data packets in at least two data streams of the service that are sent at the same time. After the timeout, the data packet is discarded.

In an implementation manner, the transceiving unit 902 is specifically configured to receive a downlink data stream from a core network device, and the downlink data stream includes the data stream of the service and its priority information.

In an implementation manner, the transceiver unit 902 is specifically configured to obtain an upstream data stream from a higher-level protocol layer or a session protocol layer, and the upstream data stream includes the data stream of the service and its priority information.

It should be noted that the division of modules in the embodiments of this application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods. In addition, each functional unit in each embodiment of this application It can be integrated into one processing unit, or it can exist alone physically, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Based on the same concept as the foregoing service transmission method, as shown in FIG. 10, an embodiment of the present application also provides a schematic structural diagram of a service transmission apparatus 1000. The apparatus 1000 may be used to implement the method described in the foregoing method embodiment, and reference may be made to the description in the foregoing method embodiment. The apparatus 1000 may be a network device or a terminal device, or may be in the network device or the terminal device.

The device 1000 includes one or more processors 1001. The processor 1001 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processor can be used to control communication devices (such as base stations, terminals, or chips), execute software programs, and process data in the software programs. The communication device may include a transceiving unit to implement signal input (reception) and output (transmission). For example, the transceiver unit may be a transceiver, a radio frequency chip, or the like.

The apparatus 1000 includes one or more processors 1001, and the one or more processors 1001 can implement the network device or satellite method in the above-mentioned embodiment.

Optionally, the processor 1001 may implement other functions in addition to implementing the methods in the above-mentioned embodiments.

Optionally, in a design, the processor 1001 may execute instructions to make the apparatus 1000 execute the method described in the foregoing method embodiment. The instructions may be stored in the processor in whole or in part, such as the instruction 1003, or in the memory 1002 coupled to the processor, in whole or in part, such as the instruction 1004, or the

instructions

1003 and 1004 may be used together to make The device 1000 executes the method described in the foregoing method embodiment.

In another possible design, the communication device 1000 may also include a circuit, and the circuit may implement the functions of the network device or the terminal device in the foregoing method embodiment.

In another possible design, the device 1000 may include one or more memories 1002, on which instructions 1004 are stored, and the instructions may be executed on the processor, so that the device 1000 executes the above method The method described in the examples. Optionally, data may also be stored in the memory. The optional processor may also store instructions and/or data. For example, the one or more memories 1002 may store the corresponding relationship described in the foregoing embodiment, or related parameters or tables involved in the foregoing embodiment. The processor and the memory can be provided separately or integrated together.

In another possible design, the device 1000 may further include a transceiver 1005 and an antenna 1006. The processor 1001 may be referred to as a processing unit, which controls a device (terminal or base station). The transceiver 1005 may be called a transceiver, a transceiver circuit, or a transceiver unit, etc., and is used to implement the transceiver function of the device through the antenna 1006.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

An embodiment of the present application also provides a communication system. The communication system includes the above-mentioned first device and the above-mentioned second device.

The embodiment of the present application also provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the service transmission method described in any of the foregoing method embodiments is implemented.

The embodiments of the present application also provide a computer program product, which, when executed by a computer, implements the service transmission method described in any of the foregoing method embodiments.

In the foregoing embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (for example, a solid state disk (Solid State Disk, SSD)) etc.

An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is configured to execute the service transmission method described in any of the foregoing method embodiments.

It should be understood that the foregoing processing device may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, At this time, the processor may be a general-purpose processor, which is realized by reading the software code stored in the memory, and the memory may be integrated in the processor, may be located outside the processor, and exist independently.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the hardware and software Interchangeability, in the above description, the composition and steps of each example have been generally described in accordance with the function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of this application.

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

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

Through the description of the foregoing implementation manners, those skilled in the art can clearly understand that this application can be implemented by hardware, firmware, or a combination of them. When implemented by software, the above-mentioned functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. The computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: computer readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data in the form of a structure The desired program code and any other medium that can be accessed by the computer. also. Any connection can suitably become a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , Fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the media. As used in this application, Disk and disc include compact discs (CD), laser discs, optical discs, digital versatile discs (DVD), floppy discs and Blu-ray discs. Disks usually copy data magnetically, while discs The laser is used to optically copy the data. The above combination should also be included in the protection scope of the computer-readable medium.

In short, the above descriptions are only preferred embodiments of the technical solutions of the present application, and are not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A service transmission method, characterized in that it comprises:

Acquire the data stream of the service and its priority information, the priority of the data stream is one of at least two service priorities, and the at least two service priorities include a first priority and a second priority, the The first priority is more important than the second priority;

The frequency band used for transmitting the data stream is determined in at least two frequency bands according to the priority of the data stream.
The method of claim 1, wherein the data stream carries service-related information.
The method according to claim 1 or 2, wherein the at least two frequency bands include at least two of the following: a sub 6G frequency band, a millimeter wave high frequency frequency band, or a WiFi frequency band.
The method according to claim 3, wherein the determining the frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream comprises:

If the priority of the data stream is the first priority, the sub 6G frequency band is preferentially used to transmit the data stream; or if the priority of the data stream is the second priority, the The data stream is transmitted in the millimeter wave high frequency band or the WiFi band.
The method according to claim 4, wherein, if the priority of the data stream is the first priority, the data stream is determined to be used for transmitting the data in at least two frequency bands according to the priority of the data stream. The frequency band of the stream also includes:

The backup data of the data stream is transmitted using the link of the millimeter wave high-frequency frequency band or the WiFi frequency band.
The method according to claim 3, wherein if the priority of the data stream is the first priority, the transmission resources of the sub 6G frequency band link do not satisfy the transmission of the data stream, and the The priority of the data stream determining the frequency band used for transmitting the data stream in at least two frequency bands includes:

Use the millimeter wave high-frequency band or WiFi band link to transmit the data stream; or

The first part of the data stream is transmitted using the sub 6G frequency band link, and the second part of the data stream is transmitted using the millimeter wave high frequency band or WiFi frequency band link, the second part The data is the data transmitted in the first data stream that does not use the link of the sub 6G frequency band.
7. The method according to any one of claims 1 to 6, wherein after determining the frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream, the method further comprises:

Determine the first transmission block size according to the channel status of the frequency band used for transmitting the data stream, and send the data in the data stream according to the first transmission block size.
The method according to claim 7, wherein the first transmission block size is determined according to the channel state of the frequency band used to transmit the data stream, and the data in the data stream is transmitted according to the first transmission block size. The block size for sending includes:

The PDCP layer of the Packet Data Convergence Protocol determines the first transmission block size according to the channel status of the frequency band used to transmit the data stream, and groups the data in the data stream according to the first transmission block size to obtain one or more PDCP protocol data unit PDU; the radio link control RLC layer and the medium access control MAC layer sequentially process the one or more PDCP PDUs, and schedule the obtained data packets of the first transmission block size to be used for transmission Physical layer transmission of the frequency band of the data stream.
The method according to any one of claims 1-8, further comprising:

For data packets in at least two data streams of the service that are sent at the same time, the same timer is configured, and the timer is used to discard the data packet after the timer of the data packet expires.
The method according to any one of claims 1-9, wherein the obtaining service data flow and priority information thereof comprises:

Receive a downlink data stream from a core network device, where the downlink data stream includes the data stream of the service and its priority information.
The method according to any one of claims 1-9, wherein the obtaining service data flow and priority information thereof comprises:

Obtain an uplink data stream from a high-level protocol layer or a session protocol layer, and the uplink data stream includes the data stream of the service and its priority information.
A service transmission device, characterized in that it comprises:

The transceiver unit is used to obtain service data flow and priority information, the priority of the data flow is one of at least two service priorities, and the at least two service priorities include a first priority and a second priority. Priority, the first priority is more important than the second priority;

The processing unit is configured to determine a frequency band for transmitting the data stream in at least two frequency bands according to the priority of the data stream.
The device according to claim 12, wherein the data stream carries service-related information.
The device according to claim 12 or 13, wherein the at least two frequency bands include at least two of the following: a sub 6G frequency band, a millimeter wave high frequency frequency band, or a WiFi frequency band.
The device according to claim 14, wherein the processing unit is specifically configured to, if the priority of the data stream is the first priority, use the sub 6G frequency band for transmission preferentially through the transceiver unit The data stream; or, if the priority of the data stream is the second priority, the data stream is transmitted using the millimeter wave high-frequency band or the WiFi band through the transceiver unit.
The device according to claim 15, wherein the processing unit is further configured to use the millimeter wave high frequency band or WiFi through the transceiver unit if the priority of the data stream is the first priority. The link of the frequency band transmits the backup data of the data stream.
The device according to claim 14, wherein the processing unit is further configured to, if the priority of the data stream is the first priority, the transmission resources of the sub 6G frequency band link do not satisfy the For data stream transmission, the data stream is transmitted using the millimeter wave high-frequency band or WiFi band link through the transceiver unit; or the data stream is transmitted using the sub 6G frequency band link through the transceiver unit The second part of the data of the data stream is transmitted through the transceiver unit using the millimeter wave high-frequency band or WiFi frequency band link, and the second part of the data is in the first data stream Data that does not use sub 6G frequency band links to transmit.
The device according to any one of claims 12-17, wherein the processing unit is further configured to determine the size of the first transmission block according to the channel status of the frequency band used to transmit the data stream, and pass the The transceiver unit sends the data in the data stream according to the size of the first transmission block.
The device according to claim 18, wherein the processing unit is specifically configured to determine the first transmission block size according to the channel status of the frequency band used for transmitting the data stream, and according to the first transmission block size Group the data in the data stream to obtain one or more packet data convergence protocol PDCP protocol data unit PDUs; sequentially process the one or more PDCP PDUs;

The transceiving unit is specifically configured to schedule the obtained data packet of the first transmission block size to the physical layer transmission of the frequency band used to transmit the data stream.
The device according to any one of claims 12-19, wherein the processing unit is further configured to configure the same timer for data packets in at least two data streams of the service that are sent at the same time, The timer is used to discard the data packet after the timer of the data packet expires.
The apparatus according to any one of claims 12-20, wherein the transceiving unit is specifically configured to receive a downlink data stream from a core network device, and the downlink data stream includes the data stream of the service and Its priority information.
The device according to any one of claims 12-20, wherein the transceiving unit is specifically configured to obtain an uplink data stream from a higher-level protocol layer or a session protocol layer, and the uplink data stream includes information about the service Data flow and its priority information.
A service transmission device, characterized in that it comprises a processor and a memory, and the processor is coupled with the memory;

Memory, used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the device executes the method according to any one of claims 1-11.
A computer-readable storage medium, characterized by comprising a program or instruction, when the program or instruction runs on a computer, the method according to any one of claims 1-11 is executed.
A computer program product, characterized by comprising a program or instruction, when the program or instruction runs on a computer, the method according to any one of claims 1-11 is executed.
A chip, characterized in that the chip is coupled with a memory, and is used to read and execute program instructions stored in the memory to execute the method according to any one of claims 1-11.