WO2020063341A1 - Procédé et dispositif de transmission vidéo - Google Patents

Procédé et dispositif de transmission vidéo Download PDF

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Publication number
WO2020063341A1
WO2020063341A1 PCT/CN2019/105268 CN2019105268W WO2020063341A1 WO 2020063341 A1 WO2020063341 A1 WO 2020063341A1 CN 2019105268 W CN2019105268 W CN 2019105268W WO 2020063341 A1 WO2020063341 A1 WO 2020063341A1
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WO
WIPO (PCT)
Prior art keywords
video data
wifi channel
terminal device
wifi
gateway device
Prior art date
Application number
PCT/CN2019/105268
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English (en)
Chinese (zh)
Inventor
刘安
张利才
申喻
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2020063341A1 publication Critical patent/WO2020063341A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and device for video transmission.
  • IPTV Internet TeleVision
  • OTT Over The Top
  • the IPTV network uses the usual multicast protocol, and the bandwidth load does not increase with the increase in the number of terminals, but requires high network quality. Once data loss occurs, data cannot be retransmitted.
  • the OTT video network uses a unicast protocol. Although there is a retransmission protection function for data transmission, the bandwidth load will continue to increase with the increase in the number of terminals, which is prone to tidal effects and wastes bandwidth.
  • Embodiments of the present invention provide a method and a device for video transmission, which ensure that video data transmission and retransmission requests do not interfere with each other, and improve transmission efficiency and video quality.
  • an embodiment of the present invention provides a method for video transmission, which is applied to a gateway device and includes: receiving video data sent by a video server; forwarding the received video data to a terminal device through a first WiFi channel; The WiFi channel receives a retransmission request from the terminal device; according to the retransmission request, sends video data to the terminal device that requests retransmission.
  • the above method ensures that video data transmission and retransmission requests do not interfere with each other, and improves video data transmission efficiency and video quality.
  • the gateway device receives the video data sent by the video server in a multicast manner and forwards it to the terminal device in a multicast manner.
  • the multicast mode further improves the efficiency of video data transmission.
  • the first WiFi channel is a 5G-WiFi channel
  • the second WiFi channel is a 2.4G-WiFi channel. WiFi channels with different frequencies further improve the efficiency of video data transmission.
  • the retransmission requested video data is sent to the terminal device through the first WiFi channel or the second WiFi channel.
  • the gateway device sends the video data requesting retransmission to the terminal device through the first channel, that is, the 5G-WiFi high-speed channel, which avoids the switching of the receiving and sending of the WiFi channel, and further improves the video data transmission efficiency and video quality.
  • the method before receiving the video data, further includes: sending the service set identifier SSID and password of the second WiFi to the terminal device through the first WiFi channel, and establishing a connection with the SSID and password according to the SSID and password.
  • the second WiFi channel of the terminal device In this way, the gateway device can only present one WiFi to the outside, which improves user usability.
  • an embodiment of the present invention provides a method for video transmission, which is applied to a terminal device, and includes: receiving video data sent by a gateway device through a first WiFi channel; determining that there is missing video data; The device sends a retransmission request; it receives video data from the gateway device that requests retransmission.
  • the terminal device receives the video data forwarded by the gateway device in a multicast manner.
  • the first WiFi channel is a 5G-WiFi channel
  • the second WiFi channel is a 2.4G-WiFi channel.
  • the retransmitted video data returned by the gateway device is received through the first WiFi channel or the second WiFi channel.
  • the method before receiving the video data, further includes: the terminal device receives the service set identifier SSID and password of the second WiFi from the gateway device through the first WiFi channel, and according to the SSID and password Establish a second WiFi channel with the gateway device.
  • an embodiment of the present invention provides a gateway device having a function for realizing the behavior of the gateway device in the foregoing method.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the foregoing functions, for example, including a receiving unit, a sending unit, and a retransmission unit.
  • the structure of the gateway device includes a processor and a memory, where the memory is configured to store program code for performing the foregoing method, and the processor is configured to execute a program stored in the memory.
  • the gateway device may further include a communication interface for communicating with other devices.
  • the communication interface includes two WiFi interfaces.
  • an embodiment of the present invention provides a terminal device, which has a function of realizing the behavior of the terminal device in the foregoing method.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the foregoing functions, for example, including a receiving unit and a retransmission unit.
  • the structure of the terminal device includes a processor and a memory, where the memory is configured to store program code for performing the foregoing method, and the processor is configured to execute a program stored in the memory.
  • the terminal device may further include a communication interface for communicating with other devices.
  • the communication interface includes two WiFi interfaces.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the foregoing gateway device or terminal device, which includes a program designed to execute the foregoing aspect.
  • video forwarding and video retransmission are performed through different WiFi channels, ensuring that video data transmission and retransmission requests do not interfere with each other, and improving video data transmission efficiency and video quality.
  • FIG. 1 is a schematic diagram of a system architecture for video transmission according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a video transmission according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of another video transmission process according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a gateway device according to an embodiment of the present invention.
  • FIG. 5 is another schematic structural diagram of a gateway device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 7 is another schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 1 is a system architecture diagram of video transmission according to an embodiment of the present invention, including: a video server 101, a gateway device 102, and a terminal device 103.
  • a gateway device can connect to multiple terminal devices and serve multiple terminal devices.
  • the video server 101 is connected to a gateway device through a network. It is used to provide video data to users. Video data can be delivered to the gateway device through unicast or multicast.
  • the gateway device 102 may be a home gateway device or a wireless access gateway device in a commercial place, and is configured to receive video data from a video server and forward the video data to a terminal device.
  • the gateway device includes two WiFi interfaces, which can establish two WiFi connections with the terminal device for video data transmission and data retransmission.
  • the two WiFi interfaces may be WiFis with different signal frequencies, for example, a WiFi connection with a frequency of 5G and a WiFi connection with a frequency of 2.4G.
  • the terminal device 103 may be a mobile phone, a TV set-top box (STB), and the like, and is configured to receive video data and display it to a user for viewing.
  • STB TV set-top box
  • the terminal device includes two WiFi interfaces, and can establish two WiFi connections with the gateway device for video data transmission and data retransmission.
  • the embodiment of the present invention adopts a dual-channel method.
  • Both the gateway device and the terminal device have two built-in WIFI chips, which can support 5G and 2.4G to work at the same time.
  • the high-speed channel is sent to the terminal device, and the retransmission request can be sent to the gateway device through the low-speed channel of 2.4G-WiFi. This ensures that video data transmission and retransmission requests do not interfere with each other, improving transmission efficiency and video quality.
  • an embodiment of the present invention provides a video transmission method.
  • the video transmission method specifically includes the following steps:
  • the gateway device receives video data sent by a video server.
  • multicasting can save network traffic.
  • the gateway device sends the received video data to the terminal device through the first WiFi channel.
  • the gateway device can send video data to the terminal device through the 5G-WiFi high-speed channel.
  • the gateway device can also forward it to the terminal device in multicast mode.
  • the terminal device sends a retransmission request to the gateway device through the second WiFi channel.
  • the terminal device may experience signal loss and bit errors when receiving the video data, resulting in video data. Lost. Video data loss will cause mosaics, freezes, etc. in the video played by the video player. This affects video playback quality and user experience.
  • the terminal device For the lost video data, the terminal device requests the gateway device to retransmit.
  • the terminal device can send a retransmission request to the gateway device through the 2.4G-WiFi low-speed channel, requesting the gateway device to retransmit the video data lost by the terminal.
  • the gateway device sends video data to the terminal device that is requested to be retransmitted.
  • the gateway device When the gateway device receives the video data in step 201, it buffers the received video data, for example, it can buffer the video data for 10 seconds. In this way, after receiving the retransmission request from the terminal device, the gateway device looks up the requested data from the buffered video data and sends it to the terminal device. The gateway device may send video data requesting retransmission through the second WiFi channel, or may send video data requesting retransmission through the first WiFi channel.
  • the gateway device sends the video data requesting retransmission to the terminal device through the first channel, that is, the 5G-WiFi high-speed channel, which avoids the switching of the receiving and sending of the WiFi channel, and further improves the video data transmission efficiency and video quality.
  • the embodiment of the present invention provides another example of a method for video transmission.
  • the 5G-WiFi high-speed channel is used for the gateway device to send video data to the terminal device
  • the 2.4G-WiFi low-speed channel is used for the terminal device to send the retransmission request to the gateway device.
  • the gateway device can only present one WiFi to the outside.
  • the 5G-WiFi service set identifier (SSID) and password can be presented to the outside, while the 2.4G-WiFi SSID and password can be configured on the gateway.
  • 5G-WiFi is delivered to the terminal device.
  • the method specifically includes the following steps:
  • the gateway device establishes a 5G-WiFi data connection with the terminal device.
  • 5G-WiFi provides a high-speed channel for transmitting video to terminal equipment.
  • the gateway device sends the 2.4G-WiFi SSID and password to the terminal device through the 5G-WiFi channel.
  • the SSID and password of 2.4G-WiFi can be configured in the gateway device.
  • the terminal device uses the received SSID and password to establish a 2.4G-WiFi data connection with the gateway device.
  • the gateway device receives the video data sent by the video server, and caches the video data.
  • multicasting can save network traffic.
  • the gateway device sends the received video data to the terminal device through the 5G-WiFi channel.
  • the gateway device After receiving the live video data sent by the video server, the gateway device forwards the video data to the terminal device through the 5G-WiFi high-speed channel. For video data transmitted in multicast mode, the gateway device can also forward it to the terminal device in multicast mode.
  • the terminal device sends a retransmission request to the gateway device through the 2.4G-WiFi channel.
  • the terminal device may experience signal loss and bit errors when receiving the video data, resulting in video data. Lost. Video data loss will cause mosaics, freezes, etc. in the video played by the video player. This affects video playback quality and user experience.
  • the terminal device For the lost video data, the terminal device sends a retransmission request to the gateway device through the 2.4G-WiFi low-speed channel, requesting the gateway device to retransmit the lost video data of the terminal.
  • the gateway device sends the requested video data to the terminal device through the 5G-WiFi channel.
  • the gateway device After receiving the retransmission request from the terminal device, the gateway device looks up the requested data from the buffered video data and sends it to the terminal device.
  • the gateway device is sent to the terminal device through the 5G-WiFi high-speed channel, which avoids the switching of the receiving and sending of the WiFi channel.
  • the two-way full-duplex communication is implemented between the gateway and the terminal, which further improves the video data transmission efficiency and video quality.
  • An embodiment of the present invention also provides a schematic structural diagram of a gateway device.
  • the gateway device includes a receiving unit 401, a sending unit 402, and a retransmission unit 403. Among them:
  • the receiving unit is configured to receive video data sent by the video server
  • the sending unit is configured to forward the received video data to the terminal device through the first WiFi channel;
  • the retransmission unit is configured to receive a retransmission request of the terminal device through the second WiFi channel, and send the video data requesting retransmission to the terminal device according to the retransmission request.
  • the gateway device is presented in the form of a functional unit.
  • the "unit" herein may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other functions that may provide the above functions.
  • ASIC application-specific integrated circuit
  • the gateway device may be implemented by using a processor, a memory, and a communication interface.
  • FIG. 5 is a schematic diagram of a computer device according to an embodiment of the present invention.
  • the computer device includes at least one processor 501, a communication bus 502, a memory 503, and at least one communication interface 504, and may further include an IO interface 505.
  • the processor may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the solution of the present invention.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication bus may include a path to transfer information between the aforementioned components.
  • the communication interface uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc.
  • the communication interface includes two WiFi communication modules.
  • the memory can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM), or other type of information that can store information and instructions
  • Dynamic storage devices can also be electrically erasable and programmable read-only memory (Electrically Programmable Read-Only Memory (EEPROM)), compact discs (Compact Disc Read-Only Memory (CD-ROM)) or other optical disc storage, optical disc storage (CD-ROM) (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be stored by a computer Any other media, but not limited to this.
  • the memory may exist independently and be connected to the processor through a bus.
  • the memory can also be integrated with the processor.
  • the memory is used to store application program code that executes the solution of the present invention, and is controlled and executed by a processor.
  • the processor is configured to execute application program code stored in the memory.
  • the processor may include one or more CPUs, and each CPU may be a single-core (single-core) processor or a multi-core (multi-core) processor.
  • a processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).
  • the computer device may further include an input / output (I / O) interface.
  • the output device may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector.
  • the input device may be a mouse, a keyboard, a touch screen device, or a sensing device.
  • the above-mentioned computer equipment may be a general-purpose computer equipment or a special-purpose computer equipment.
  • the computer device may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device, or the like as shown in FIG. 5 Structure of equipment.
  • PDA personal digital assistant
  • the embodiment of the present invention does not limit the type of computer equipment.
  • the gateway device shown in FIG. 1 may be the device shown in FIG. 5, and one or more software modules are stored in the memory.
  • the gateway device may implement a software module through a processor and program code in a memory to complete the foregoing method.
  • An embodiment of the present invention further provides a computer storage medium for storing computer software instructions used by the device shown in FIG. 4 or FIG. 5, which includes a program designed to execute the foregoing method embodiment.
  • the above method can be implemented by executing a stored program.
  • An embodiment of the present invention also provides a schematic structural diagram of a terminal device, as shown in FIG. 6, including a receiving unit 601 and a retransmission unit 602. Among them:
  • a receiving unit configured to receive video data sent by a gateway device through a first WiFi channel
  • the retransmission unit is configured to determine that there is lost video data, send a retransmission request to the gateway device through the second WiFi channel, and receive the video data requesting retransmission returned by the gateway device.
  • the terminal device is presented in the form of a functional unit.
  • the "unit" herein may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other functions that may provide the above functions Device.
  • ASIC application-specific integrated circuit
  • the terminal device may be implemented by using a processor, a memory, and a communication interface.
  • FIG. 7 is a schematic diagram of a computer device according to an embodiment of the present invention.
  • the computer device includes at least one processor 701, a communication bus 702, a memory 703, and at least one communication interface 704, and may further include an IO interface 705.
  • the processor may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the solution of the present invention.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication bus may include a path to transfer information between the aforementioned components.
  • the communication interface uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc.
  • the communication interface includes two WiFi communication modules.
  • the memory can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM), or other type of information that can store information and instructions
  • Dynamic storage devices can also be electrically erasable programmable read-only memory (Electrically Programmable Read-Only Memory (EEPROM)), read-only compact discs (Compact Disc Read-Only Memory (CD-ROM)) or other compact disc storage, optical disc storage ( (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be stored by a computer Any other media, but not limited to this.
  • the memory may exist independently and be connected to the processor through a bus.
  • the memory can also be integrated with the processor.
  • the memory is used to store application program code that executes the solution of the present invention, and is controlled and executed by a processor.
  • the processor is configured to execute application program code stored in the memory.
  • the processor may include one or more CPUs, and each CPU may be a single-core (single-core) processor or a multi-core (multi-core) processor.
  • a processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).
  • the computer device may further include an input / output (I / O) interface.
  • the output device may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector.
  • the input device may be a mouse, a keyboard, a touch screen device, or a sensing device.
  • the above-mentioned computer equipment may be a general-purpose computer equipment or a special-purpose computer equipment.
  • the computer device may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device, or the like in FIG. Structure of equipment.
  • PDA personal digital assistant
  • the embodiment of the present invention does not limit the type of computer equipment.
  • the terminal device shown in FIG. 1 may be the device shown in FIG. 7, and one or more software modules are stored in the memory.
  • the terminal device may implement a software module through a processor and program code in a memory to complete the foregoing method.
  • An embodiment of the present invention further provides a computer storage medium for storing computer software instructions used by the device shown in FIG. 6 or FIG. 7, which includes a program designed to execute the foregoing method embodiment.
  • the above method can be implemented by executing a stored program.
  • the embodiments of the present invention may be provided as a method, an apparatus (device), or a computer program product. Therefore, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The computer program is stored / distributed in a suitable medium, provided with or as part of the hardware, or in other distributed forms, such as via the Internet or other wired or wireless telecommunications systems.
  • These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that the instructions generated by the processor of the computer or other programmable data processing device are used to generate instructions Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a particular manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions
  • the device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission vidéo exécuté dans un dispositif passerelle. Le procédé consiste à : recevoir des données vidéo envoyées par un serveur vidéo ; transmettre les données vidéo à un dispositif terminal via un premier canal Wi-Fi ; recevoir une demande de retransmission, du dispositif terminal, via un second canal Wi-Fi ; et, en réponse à la demande de retransmission, envoyer, au dispositif terminal, des données vidéo devant être demandées pour une retransmission. L'invention garantit l'absence d'interférence entre une transmission de données vidéo et une demande de retransmission, ce qui améliore l'efficacité de transmission et la qualité vidéo.
PCT/CN2019/105268 2018-09-27 2019-09-11 Procédé et dispositif de transmission vidéo WO2020063341A1 (fr)

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CN201811127648.XA CN110958068B (zh) 2018-09-27 2018-09-27 一种视频传输的方法和设备
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