WO2022077503A1 - 无线投屏方法、装置及系统 - Google Patents

无线投屏方法、装置及系统 Download PDF

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Publication number
WO2022077503A1
WO2022077503A1 PCT/CN2020/121686 CN2020121686W WO2022077503A1 WO 2022077503 A1 WO2022077503 A1 WO 2022077503A1 CN 2020121686 W CN2020121686 W CN 2020121686W WO 2022077503 A1 WO2022077503 A1 WO 2022077503A1
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WIPO (PCT)
Prior art keywords
period
screen projection
wireless screen
display device
time
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PCT/CN2020/121686
Other languages
English (en)
French (fr)
Inventor
顾燕杰
李卫华
韩云锋
高林
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202080105549.0A priority Critical patent/CN116325764A/zh
Priority to PCT/CN2020/121686 priority patent/WO2022077503A1/zh
Priority to EP20957281.7A priority patent/EP4216559A4/en
Publication of WO2022077503A1 publication Critical patent/WO2022077503A1/zh
Priority to US18/300,435 priority patent/US20230252919A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/4104Peripherals receiving signals from specially adapted client devices
    • H04N21/4122Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/002Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43637Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4436Power management, e.g. shutting down unused components of the receiver
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving
    • G09G2330/022Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00Aspects of interface with display user
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00Aspects of data communication
    • G09G2370/16Use of wireless transmission of display information
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a wireless screen projection method, device, and system.
  • Wi-Fi wireless fidelity
  • the electronic device needs to sleep according to the Wi-Fi sleep cycle.
  • the display frame rate of electronic devices is relatively high, and the time taken to transmit one frame of image is relatively short, while the period of Wi-Fi transmission or sleep is relatively long. If the electronic device sleeps, it will not be able to transmit images at the display frame rate, which will affect the Wi-Fi screen projection effect. Therefore, even in the case of no data transmission, the electronic device needs to maintain a listening state and cannot sleep, which leads to an increase in the power consumption of the Wi-Fi chip, which in turn affects the service life of the Wi-Fi chip.
  • Embodiments of the present application provide a wireless screen projection method, device, and system, which can use a display frame rate to determine a transmission period, and configure a sleep period in the transmission period. Data is transmitted according to the transmission cycle, which can effectively reduce the power consumption of the Wi-Fi chip.
  • an embodiment of the present application provides a method for wireless screen projection.
  • the method can be performed by a wireless screen projection device, and can also be performed by a component (such as a chip system) in the wireless screen projection device.
  • the method includes: wireless screen projection
  • the device determines the duration of the first transmission cycle according to the display frame rate when the wireless screen projection device displays the image.
  • the wireless screen projection device negotiates with the display device to determine the time domain resource configuration of the first transmission period.
  • the time domain resources of the first transmission period are configured to include a first period, a second period and a third period, the first period is used to send the first data to the display device, and the second period is used to receive the first data sent by the display device.
  • the second data, the third period is used for sleep.
  • the wireless screen projection device transmits the wireless screen projection data with the display device based on the first transmission period.
  • the first data includes a first image
  • the first image includes, for example, a video image, an animation image, an image of a text file, and the like.
  • the first data may also include a control command sent by the wireless screen projection device to the display device, and the like.
  • the second data includes, for example, data that needs to be fed back to the wireless screen projection device after the display device detects a touch or a key operation, image data collected by the display device, and the like. Through the interactive transmission of the first data and the second data, wireless screen projection is realized.
  • the display device if the display device does not generate the second data, the display device does not need to configure the second period, or configures the second period to be zero. After the display device obtains the first information, according to the first transmission period and the first period, all the remaining periods in the first transmission period are determined as the third period.
  • the wireless screen projection data can be transmitted according to the first transmission cycle, so as to avoid the problem of data loss.
  • the time domain resource configuration of the first transmission period determined by the wireless screen projection device and the display device is the same, so it can be ensured that both are in a dormant state in the third time period. And there will be no delay caused by dormancy, reducing power consumption and improving user experience.
  • the wireless screen projection device negotiates with the display device to determine the time domain resource configuration of the first transmission period, including: the wireless screen projection device sends first information to the display device, where the first information is used to indicate the first transmission period. The duration of the transmission cycle, and the duration of the first period. The wireless screen projection device receives second information sent by the display device in response to the first information, where the second information is used to indicate the duration of the second period. The wireless screen projection device sets the remaining period in the first transmission cycle as the third period according to the duration of the first period and the duration of the second period.
  • the manner in which the first information indicates the duration of the first transmission period and the duration of the first period may include an implicit notification manner or an explicit notification manner.
  • the implicit notification method includes carrying the information of the duration of the first transmission period and the duration of the first period in the first information.
  • the display notification method includes a preconfigured information reading method, which directly uses the first information to indicate the time domain resource configuration.
  • the first information is indication information, and after receiving the first information, the display device can determine the duration of the first transmission cycle indicated in the first information, and the duration of the first period in a manner pre-agreed with the wireless screen projection device. duration.
  • the first information may be 111111XXXX.
  • each bit is used to represent 1 ms
  • the number of bits occupied by the first information is used to represent the duration of the first transmission period
  • a bit value of 1 indicates that it is used to transmit the first data.
  • the display device can configure the time domain resources of the remaining period in the first transmission cycle according to the duration of the first period.
  • the manner in which the second information indicates the duration of the second period may include an implicit notification manner or an explicit notification manner.
  • the implicit notification method includes carrying information of the duration of the second time period in the second information.
  • the display notification method includes a preconfigured information reading method, and the second information is directly used to indicate the time domain resource configuration.
  • the second information is indication information, and after receiving the second information, the wireless screen projection device can determine the duration of the second time period indicated in the second information in a manner pre-agreed with the display device.
  • the second information may be 1111110XXX.
  • a bit value of 0 indicates that it is used to transmit the second data.
  • the wireless screen projection device can configure the remaining period as the third period for sleeping according to the duration of the second period. Moreover, through the interaction of the first information and the second information, it can be ensured that the wireless screen projection device and the display device determine the same transmission period and sleep period.
  • the first period, the second period and the third period are sequentially configured.
  • the wireless screen projection device in order to implement wireless screen projection, it should be prioritized that the wireless screen projection device transmits image data to the display device. Therefore, the first period of time should be preferentially configured in the first transmission cycle. That is, in the process of resource configuration in the first transmission period, the previous time domain resource is configured as the resource for transmitting the first data. After that, the second period and the third period are sequentially configured.
  • durations of the first period and the second period should be shorter than the first transmission period.
  • the method further includes: the wireless screen projection device sends third information to the display device, where the third information is used to indicate display The device, calibrates the time of the display device according to the first time; the first time is determined by the wireless screen projection device according to the local time and the duration of sending the third information.
  • the wireless screen projection device and the display device perform data transmission in real time according to the first transmission cycle, it is necessary to ensure the time synchronization of the wireless screen projection device and the display device. Then, before starting screen projection, it is also necessary to calibrate the time of the wireless screen projection device and the display device.
  • the wireless screen projection device and the display device can realize real-time Wi-Fi wireless screen projection based on the same time and according to the configured first transmission cycle, so as to avoid screen projection abnormalities.
  • the STA sends beacon frames according to a fixed period for time synchronization. Therefore, a TSF timer is configured in the Wi-Fi chip for TSF calibration.
  • the TSF timer can determine the local time of the wireless screencasting device. After that, if the local time needs to be sent, in the process of sending data, the device transmission will also generate a part of time-consuming. Therefore, the TSF timer needs to determine the first time according to the current local time of the wireless screen projection device and the possible time-consuming of sending the local time in the future, thereby ensuring that the display device obtains an accurate time reference.
  • the method further includes: the wireless screen projection device sends the third information to the display device according to a second transmission period, where the second transmission period is a beacon period.
  • the time of the two is not aligned.
  • a second transmission period is configured, and during the wireless screen projection process, the wireless screen projection device and the display device perform time calibration according to the second transmission period.
  • the wireless screen projection device and the display device can send beacon frames periodically to achieve time synchronization. Therefore, the second transmission period is configured as the period in which the beacon is sent.
  • the method further includes: the wireless screen projection device, according to the first transmission period, performs one or more of the following: sending the first data to the display device in the first time period, and receiving the first data in the second time period The second data sent by the display device sleeps in the third period.
  • the method further includes: the wireless screen projection device receives a first request sent by the display device, the first request is used to request sleep, and the first request is a request sent by the display device at any of the following moments: At the end of the second period, after the last second data is sent, and at the end of the first period, after the last first data is received.
  • the wireless screen projection device instructs the display device to sleep, the wireless screen projection device starts to sleep.
  • the wireless screen projection device carries a flag in the last first data sent, and after receiving the first data, the display device can confirm that the current data is the last first data according to the flag.
  • the method further includes: the wireless screen projection device receives a second request sent by the display device, where the second request is used to request wake-up; the second request is sent by the display device after the first transmission period ends ask. In response to the second request, the wireless screen projection device wakes up the display device and sends the first data to the display device.
  • the display device sends a request to the wireless screen projection device for requesting to sleep or wake up, thereby ensuring that the wireless screen projection device and the display device can sleep or wake up at the same time, thereby avoiding loss of transmitted data.
  • the wireless screen projection device and the display device perform time calibration according to the second transmission cycle to ensure that between two time calibration points, the wireless screen projection device and the display device will not experience transmission abnormalities due to time misalignment.
  • the duration of the first transmission period is sufficient for the wireless screen projection device to transmit the wireless screen projection data according to the display frame rate.
  • the first transmission period is the inverse of the display frame rate.
  • the wireless screen projection device determines the first transmission period according to the display frame rate for displaying the first image. In this way, it is ensured that the currently displayed first image can be projected wirelessly normally.
  • an embodiment of the present application provides a wireless screen projection method.
  • the method can be executed by a display device or by a component (such as a chip system) in the display device.
  • the method includes: a display device and a wireless screen projection device.
  • the time domain resource configuration of the first transmission period is determined through negotiation.
  • the duration of the first transmission cycle is determined by the wireless screen projection device according to the display frame rate when displaying images; the time domain resources of the first transmission cycle are configured to include a first period, a second period and a third period, the first period It is used for receiving the first data sent by the wireless screen projection device, the second period is a period determined by the display device for sending the second data to the wireless screen projection device, and the third period is used for sleeping.
  • the display device transmits the wireless screen projection data with the wireless screen projection device based on the first transmission period, and displays the image.
  • the display device negotiates with the wireless screen projection device to determine the time domain resource configuration of the first transmission period, including: the display device receives first information sent by the wireless screen projection device, where the first information is used to indicate the first transmission period. The duration of a transmission cycle and the duration of the first period; in response to the first information, the display device sends second information to the wireless screen projection device, and the second information is used to indicate the duration of the second period; the display device according to the first period The duration and the duration of the second period, the remaining period in the first transmission cycle is set as the third period.
  • the first period, the second period and the third period are sequentially configured.
  • the method before the display device transmits data with the wireless screen projection device based on the first transmission period, the method further includes: the display device receives third information sent by the wireless screen projection device to obtain the first time.
  • the display device determines the second time according to the first time and the duration of receiving the third information.
  • the display device uses the second time to calibrate the local time.
  • the method further includes: the display device receives the third information sent by the wireless screen projection device according to a second transmission period, where the second transmission period is a beacon period.
  • the method further includes: the display device performs one or more of the following contents according to the first transmission period: receiving the first data sent by the wireless screen projection device in the first period, and in the second period Send the second data to the wireless screen projection device, and sleep in the third period.
  • the method further includes: the display device sends a first request to the wireless screen projection device, the first request is used to request sleep, and the first request is sent at any of the following times: at the end of the second period, sending After the last second data, at the end of the first period, after receiving the last first data.
  • the display device starts to sleep after determining that the wireless screen projection device has received the first request.
  • the method further includes: after the first transmission period ends, the display device sends a second request to the wireless screen projection device, where the second request is used to request wake-up.
  • the display device wakes up after determining that the wireless screen projection device has received the second request, and starts to receive the first data.
  • the duration of the first transmission period is sufficient for the display device to display the image according to the display frame rate.
  • the first transmission period is the inverse of the display frame rate.
  • an embodiment of the present application provides a wireless screen projection device, and the device may include: a processing module and a transceiver module.
  • the processing module is configured to determine the duration of the first transmission cycle according to the display frame rate when the wireless screen projection device displays the image.
  • the processing module is further configured to negotiate with the display device to determine the time domain resource configuration of the first transmission period; wherein, the time domain resources of the first transmission period are configured to include a first period, a second period and a third period, the first period It is used for sending the first data to the display device, the second time period is used for receiving the second data sent by the display device, and the third time period is used for sleeping.
  • the transceiver module is used to transmit the wireless screen projection data with the display device based on the first transmission period.
  • the transceiver module is specifically configured to send first information to the display device, where the first information is used to indicate the duration of the first transmission cycle and the duration of the first period. And, second information sent by the display device in response to the first information is received, where the second information is used to indicate the duration of the second period.
  • the processing module is specifically configured to set the remaining period in the first transmission cycle as the third period according to the duration of the first period and the duration of the second period.
  • the first period, the second period and the third period are sequentially configured.
  • the transceiver module is further configured to send third information to the display device, where the third information is used to instruct the display device to calibrate the time of the display device according to the first time.
  • the first time is determined by the processing module according to the local time and the duration of sending the third information.
  • the transceiver module is further configured to send the third information to the display device according to a second transmission period, where the second transmission period is a beacon period.
  • the transceiver module is further configured to perform one or more of the following according to the first transmission cycle: sending the first data to the display device during the first period, and receiving the data sent by the display device during the second period of the second data, sleep in the third period.
  • the transceiver module is further configured to receive a first request sent by the display device, the first request is used to request sleep, and the first request is a request sent by the display device at any of the following moments: the second time period At the end, after the last second data is sent, at the end of the first period, after the last first data is received; the processor is further configured to control the transceiver module to start sleeping after instructing the display device to sleep in response to the first request.
  • the transceiver module is further configured to receive a second request sent by the display device, where the second request is used to request wake-up; the second request is a request sent by the display device after the first transmission period ends.
  • the processing module is further configured to wake up the display device in response to the second request, and control the transceiver module to send the first data to the display device.
  • the duration of the first transmission period is sufficient to transmit the wireless screen projection data according to the display frame rate.
  • the first transmission period is the inverse of the display frame rate.
  • the transceiver module may include a sending module and a receiving module.
  • the sending module is used for sending wireless screen projection data to the display device.
  • the receiving module is used to receive the wireless screen projection data sent by the display device.
  • the embodiments of the present application do not specifically limit the specific implementation manner of the transceiver module.
  • the wireless screen projection device described in the third aspect may further include a storage module, where the storage module stores programs or instructions.
  • the processing module executes the program or instruction
  • the wireless screen projection device described in the third aspect can execute the wireless screen projection method described in the first aspect.
  • the wireless screen projection device described in the third aspect may be a wireless screen projection device or a chip (system) or other components or components that can be provided in the wireless screen projection device, which is not limited in this application.
  • an embodiment of the present application provides a display device, which may include: a transceiver module, a processing module, and a display module.
  • the processing module is configured to negotiate with the wireless screen projection device to determine the time domain resource configuration of the first transmission period; wherein, the duration of the first transmission cycle is determined by the wireless screen projection device according to the display frame rate when displaying the image; the first transmission period
  • the periodic time domain resource is configured to include a first period, a second period and a third period, the first period is used to receive the first data sent by the wireless screen projection device, and the second period is determined by the processing module for the wireless screen projection.
  • the period during which the device sends the second data, and the third period is used for sleep; the transceiver module is used for transmitting the wireless screen projection data with the wireless screen projection device based on the first transmission period.
  • the display module is used to display images based on the wireless projection data.
  • the transceiver module is specifically configured to receive first information sent by the wireless screen projection device, where the first information is used to indicate the duration of the first transmission cycle and the duration of the first period.
  • the transceiver module is further configured to send second information to the wireless screen projection device, where the second information is used to indicate the duration of the second period.
  • the processing module is specifically configured to set the remaining period in the first transmission cycle as the third period according to the duration of the first period and the duration of the second period.
  • the first period, the second period and the third period are sequentially configured.
  • the transceiver module is further configured to receive the third information sent by the wireless screen projection device to obtain the first time.
  • the transceiver module is specifically configured to determine the second time according to the first time and the duration of receiving the third information; and use the second time to calibrate the local time.
  • the transceiver module is further configured to receive the third information sent by the wireless screen projection device according to a second transmission period, where the second transmission period is a beacon period.
  • the transceiver module is further configured to perform one or more of the following according to the first transmission cycle: receive the first data sent by the wireless screen projection device in the first period, and send the data to the second period in the second period.
  • the wireless screen projection device sends the second data and sleeps in the third period.
  • the transceiver module is further configured to send a first request to the wireless screen projection device, the first request is used to request sleep, and the first request is sent at any of the following times: at the end of the second period, the last request is sent After a second data, at the end of the first period, after receiving the last first data.
  • the transceiver module is further configured to start sleeping after it is determined that the wireless screen projection device receives the first request.
  • the transceiver module is further configured to send a second request to the wireless screen projection device after the first transmission period ends, where the second request is used to request wake-up.
  • the transceiver module is further configured to wake up after determining that the wireless screen projection device has received the second request, and start to receive the first data.
  • the duration of the first transmission period is sufficient for the display module to display the image according to the display frame rate.
  • the first transmission period is the inverse of the display frame rate.
  • the transceiver module may include a receiving module and a sending module.
  • the receiving module is used for receiving wireless screen projection data sent by the wireless screen projection device.
  • the sending module is used for sending wireless screen projection data to the wireless screen projection device.
  • the embodiments of the present application do not specifically limit the specific implementation manner of the transceiver module.
  • the display device may further include a storage module, where the storage module stores programs or instructions.
  • the processing module executes the program or instruction
  • the display device described in the fourth aspect can execute the wireless screen projection method described in the second aspect.
  • the display device described in the fourth aspect may be a display device or a chip (system) or other components or components that can be provided in the display device, which is not limited in this application.
  • an embodiment of the present application provides a wireless screen projection device, which may include: a processor and a transceiver.
  • the processor is configured to: determine the duration of the first transmission cycle according to the display frame rate when the wireless screen projection device displays the image. And through negotiation with the display device, determine the time domain resource configuration of the first transmission cycle; wherein, the time domain resource of the first transmission cycle is configured to include a first period, a second period and a third period, and the first period is used to The display device sends the first data, the second period is used for receiving the second data sent by the display device, and the third period is used for sleep.
  • the transceiver is used to transmit the wireless screen projection data with the display device based on the first transmission period.
  • the transceiver is specifically configured to: send first information to the display device, where the first information is used to indicate the duration of the first transmission cycle and the duration of the first period. Second information sent by the display device in response to the first information is received, where the second information is used to indicate the duration of the second period.
  • the processor is specifically configured to set the remaining period in the first transmission cycle as the third period according to the duration of the first period and the duration of the second period.
  • the first transmission period in the first transmission period, the first period, the second period and the third period are sequentially configured.
  • the transceiver is further configured to send third information to the display device, where the third information is used to instruct the display device to calibrate the time of the display device according to the first time; the first time is the transceiver according to the local time and the duration of sending the third information is determined.
  • the transceiver is further configured to send the third information to the display device according to a second transmission period, where the second transmission period is a beacon period.
  • the transceiver is further configured to receive a first request sent by the display device, the first request is used to request sleep, and the first request is a request sent by the display device at any of the following moments: the second time period At the end, after sending the last second data, at the end of the first period, after receiving the last first data.
  • the processor is further configured to control the transceiver to sleep after instructing the display device to sleep in response to the first request.
  • the transceiver is further configured to receive a second request sent by the display device, where the second request is used to request wake-up; the second request is a request sent by the display device after the first transmission period ends.
  • the processor is further configured to wake up the display device in response to the second request, and control the transceiver to send the first data to the display device.
  • the duration of the first transmission period is sufficient for the transceiver to transmit the wireless screen projection data according to the display frame rate.
  • the first transmission period is the inverse of the display frame rate.
  • an embodiment of the present application provides a display apparatus, and the apparatus may include: a processor, a transceiver, and a display screen.
  • the processor is configured to negotiate with the wireless screen projection device to determine the time domain resource configuration of the first transmission period; wherein, the duration of the first transmission cycle is determined by the wireless screen projection device according to the display frame rate when displaying the image; the first transmission cycle
  • the periodic time domain resource is configured to include a first period, a second period and a third period, the first period is used for receiving the first data sent by the wireless screen projection device, and the second period is determined by the processor and used for the wireless screen projection The period during which the device sends the second data, and the third period is used for sleep.
  • the transceiver is used to transmit the wireless screen projection data with the wireless screen projection device based on the first transmission period.
  • the display screen is used to display images based on wireless projection data.
  • the transceiver is specifically configured to: receive first information sent by the wireless screen projection device, where the first information is used to indicate the duration of the first transmission period and the duration of the first period. Send second information to the wireless screen projection device, where the second information is used to indicate the duration of the second time period.
  • the processor is specifically configured to set the remaining period in the first transmission cycle as the third period according to the duration of the first period and the duration of the second period.
  • the first period, the second period and the third period are sequentially configured.
  • the transceiver is further configured to receive the third information sent by the wireless screen projection device to obtain the first time; and determine the second time according to the first time and the duration of receiving the third information; using The second time, the local time is calibrated.
  • the transceiver is further configured to receive the third information sent by the wireless screen projection device according to a second transmission period, where the second transmission period is a beacon period.
  • the transceiver is further configured to send a first request to the wireless screen projection device, the first request is used to request dormancy, and the first request is sent at any of the following times: at the end of the second period, the last request is sent After a second data, at the end of the first period, after receiving the last first data.
  • the processor is further configured to control the transceiver to sleep after it is determined that the wireless screen projection device receives the first request.
  • the transceiver is further configured to send a second request to the wireless screen projection device after the first transmission period ends, where the second request is used to request wake-up.
  • the processor is further configured to wake up the transceiver after determining that the wireless screen projection device has received the second request, and control the transceiver to receive the first data.
  • the duration of the first transmission period satisfies the display screen to display the image according to the display frame rate.
  • the first transmission period is the inverse of the display frame rate.
  • an embodiment of the present application provides a wireless screen projection device, including: a processor and a memory.
  • Memory for storing computer programs.
  • the processor is configured to execute the computer program stored in the memory, so that the wireless screen projection device executes the method described in the first aspect and the second aspect and any of the possible implementation manners.
  • an embodiment of the present application provides a wireless screen projection device, where the device includes: a processor and an interface circuit.
  • An interface circuit for receiving code instructions and transmitting them to the processor.
  • the processor is configured to execute the code instructions to perform the methods described in the first and second aspects above, and any of the possible implementations thereof.
  • an embodiment of the present application provides a wireless screen projection device.
  • the device may be a chip system, and the chip system may include a processor and a memory, for implementing the above-mentioned first and second aspects, and The function of the method described in any of the possible implementations.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • an embodiment of the present application provides a wireless screen projection device, the device may be a circuit system, the circuit system includes a processing circuit, and the processing circuit is configured to perform the above-mentioned first and second aspects, and any one of them methods described in possible implementations.
  • an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed, the first and second aspects above, and The method described in any of the possible implementations is implemented.
  • embodiments of the present application provide a computer program product containing instructions, when the computer program product is run on a computer, the computer is made to execute the above-mentioned first and second aspects, and any one of them methods described in possible implementations.
  • an embodiment of the present application provides a chip, where the chip includes: a processor and an interface circuit.
  • An interface circuit for receiving code instructions and transmitting them to the processor.
  • the processor is configured to execute the code instructions to perform the methods described in the first and second aspects above, and any of the possible implementations thereof.
  • an embodiment of the present application provides a wireless screen projection system, including a wireless screen projection device and a display device.
  • the wireless screen projection device can be used to implement the method described in the first aspect and any of the possible implementation manners.
  • the display device can be used to implement the method described in the second aspect and any of the possible implementation manners.
  • FIG. 1A is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 1B is a schematic diagram 1 of an application scenario of the wireless screen projection method provided by the embodiment of the present application.
  • FIG. 1C is a second schematic diagram of an application scenario of the wireless screen projection method provided by the embodiment of the present application.
  • FIG. 2 is a schematic structural diagram 1 of a communication device provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram 1 of a frame structure of a wireless screen projection method in the prior art provided by an embodiment of the present application;
  • FIG. 4 is a second schematic diagram of a frame structure of a wireless screen projection method in the prior art according to an embodiment of the present application;
  • 5A is a schematic flowchart 1 of a wireless screen projection method provided by an embodiment of the present application.
  • FIG. 5B is a second schematic flowchart of a wireless screen projection method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram 1 of a frame structure of a wireless screen projection method provided by an embodiment of the present application.
  • FIG. 7 is a third schematic flowchart of a wireless screen projection method provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a Wi-Fi chip structure and a packet structure provided by an embodiment of the present application.
  • FIG. 9 is a second schematic diagram of a frame structure of a wireless screen projection method provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a wireless screen projection device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • Display frame rate is used to indicate the frequency (also referred to as the rate) of images continuously appearing on the display in units of frames, and the unit is Hertz (Hz). Specifically, the display frame rate is used to describe the number of images displayed by the electronic device per second. If the display frame rate is 40Hz, it means that the electronic device displays 40 images per second.
  • the display frame rate is also used to indicate the smoothness of the display screen of the electronic device.
  • the display frame rate of game or movie images is higher, and the display frame rate of conference or office projection images is lower.
  • Timing synchronization function timer synchronization function, TSF
  • the data interaction mode between a wireless access point (AP) and a station (station, STA) is defined in the wireless local area network standard. Among them, each electronic device connected to the wireless network can be called a site.
  • a wireless access point AP
  • STA station
  • the TSF mechanism is used in the protocol to ensure the time synchronization between the AP and the STA.
  • the AP needs to periodically send a beacon frame
  • the STA needs to wake up periodically to receive the beacon frame.
  • the STA initializes the TSF timer, uses the beacon frame to inform other APs of its local time, and sets the time stamp for sending the beacon frame to achieve time synchronization.
  • a STA transmission or sleep period is generally 100ms, and in a low power consumption state, the STA sends a beacon frame every 100ms for time synchronization.
  • the display frame rate of electronic devices generally cannot be aligned with the Wi-Fi sleep period. For example, if the display frame rate of the electronic device is 30Hz, the time to transmit an image is about 33.33ms, which cannot be multiplied with 100m. If the electronic device sleeps according to the Wi-Fi sleep cycle, it will be unable to transmit images at the display frame rate.
  • FIG. 1A is a schematic diagram of a communication system to which a wireless screen projection method provided by an embodiment of the present application is applied.
  • the communication system includes a wireless screen projection device 100 and a display device 200 .
  • the wireless screen projection device 100 and the display device 200 may be connected through a wireless network. For example, connecting via a Wi-Fi network.
  • the wireless screen projection device 100 sends the content displayed on the screen to the display device 200 through a Wi-Fi network, and the display device 200 displays it. That is, during the wireless screen projection process, the display contents of the wireless screen projection device 100 and the display device 200 are the same.
  • the above-mentioned wireless screen projection device 100 includes, for example, a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), an in-vehicle device, User terminal (user terminal, UT), terminal equipment (user device, UD), user equipment (user equipment, UE), artificial intelligence (artificial intelligence (AI) equipment and other terminal equipment with image display function, the embodiment of the present application
  • the specific type of the wireless screen projection device 100 is not limited in any way.
  • the display device of the above-mentioned display device 200 includes, for example, a notebook computer, a large-screen display device (such as a smart screen, etc.), a projection device, an AI device, a tablet computer, and other terminal devices capable of realizing a large-screen display function.
  • a notebook computer a large-screen display device (such as a smart screen, etc.)
  • a projection device a projection device
  • an AI device a tablet computer
  • other terminal devices capable of realizing a large-screen display function.
  • the specific type of the display device 200 is not limited in any way.
  • the wireless screen projection device 100 performs screen projection with a relatively high display frame rate, such as games and movies.
  • the current display frame rate is above 60Hz.
  • the wireless screen projection device 100 is a mobile phone, and the display device 200 is a TV.
  • the wireless screen projection device 100 transmits the content being displayed as the first data to the display device 200 for display through the Wi-Fi network.
  • the first data also includes a control command sent by the wireless screen projection device 100 to the display device after detecting that the user clicks on the screen, key, or gamepad/remote controller 101 . Such as operating the command of the character jumping shown in FIG.
  • the display device 200 may further send second data to the wireless screen projection device 100 .
  • the second data may include image data collected by the display device 200 through the camera 201, and the like.
  • the second data may further include commands such as pause detected by the display apparatus 200 through the touch screen.
  • the wireless screen projection device 100 performs screen projection with a lower display frame rate, such as a conference, an office, and the like.
  • the current display frame rate is below 20Hz.
  • the wireless screen projection device 100 is a notebook computer, and the display device 200 is a projection device.
  • the wireless screen projection device 100 sends the first data to the display device 200 .
  • the wireless screen projection device 100 uses the display device 200 to display the displayed text content on a large screen.
  • the display apparatus 200 is configured to receive and display the first data, but will not send the second data to the wireless screen projection apparatus 100 .
  • the wireless screen projection apparatus 100 and the display apparatus 200 in this embodiment of the present application may be implemented by different devices.
  • the wireless screen projection device 100 and the display device 200 in the embodiments of the present application may be implemented by the communication device in FIG. 2 .
  • the communication device 200 includes at least one processor 201 , a communication line 202 , a memory 203 and at least one communication interface 204 .
  • the memory 203 may also be included in the processor 201 .
  • the processor 201 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the communication line 202 may be a circuit that interconnects the aforementioned components and transfers information between the aforementioned components.
  • the communication interface 204 may be a module, a circuit, a bus, an interface, a transceiver, or other devices capable of implementing a communication function, and is used to communicate with other devices.
  • the transceiver can be an independently set transmitter, and the transmitter can be used to send information to other devices, and the transceiver can also be an independently set receiver, used for receiving Other devices receive the information.
  • the transceiver may also be a component that integrates the functions of sending and receiving information, and the specific implementation of the transceiver is not limited in this embodiment of the present application.
  • Memory 203 may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • DR RAM direct rambus RAM
  • the memory 203 may exist independently, and is connected to the processor 201 through the communication line 202 .
  • the memory 203 may also be integrated with the processor 201 .
  • the memory 203 is used for storing computer-executed instructions for implementing the solutions of the present application, and the execution is controlled by the processor 201 .
  • the processor 201 is configured to execute the computer-executable instructions stored in the memory 203, thereby implementing the method for determining parameters provided in the following embodiments of the present application.
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the computer-executed instructions in the embodiments of the present application may also be referred to as application code, instructions, computer programs, or other names, which are not specifically limited in the embodiments of the present application.
  • the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .
  • the communication apparatus 200 may include multiple processors, such as the processor 201 and the processor 207 in FIG. 2 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the communication apparatus 200 may further include an output device 205 and an input device 206 .
  • the output device 205 is in communication with the processor 201 and can display information in a variety of ways.
  • the output device 205 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • Input device 206 is in communication with processor 201 and can receive user input in a variety of ways.
  • the input device 206 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • the above-mentioned communication apparatus 200 may be a general-purpose device or a dedicated device, and the embodiment of the present application does not limit the type of the communication apparatus.
  • the structure of the communication device 200 shown in FIG. 2 does not constitute a limitation of the communication device, and an actual communication device may include more or less components than shown, or combine some components, or arrange different components.
  • the illustrated components may be implemented in hardware, software, or a combination of software and hardware.
  • the following describes a wireless screen projection method between a wireless screen projection device and a display device applied to the two wireless screen projection scenarios shown in FIG. 1B and FIG. 1C .
  • the wireless screen projection device sends first data to the display device on time unit 1 and time unit 2, and the display device sends second data to the wireless screen projection device on time unit 3, and the wireless screen is realized through data interaction. screencast.
  • the wireless screen projection device and the display device are in the monitoring state.
  • the wireless screen projection device and the display device keep the monitoring state on the time unit 7 and the time unit 8 for monitoring the next time. Whether the unit has the first data or the second data to avoid data loss.
  • the current wireless screen projection method can provide users with a better wireless screen projection experience.
  • the electronic device also needs to maintain the monitoring state and cannot sleep, which leads to a large power consumption of the Wi-Fi chip and affects the service life of the Wi-Fi chip.
  • the power consumption of the Wi-Fi chip of the electronic device is reduced by setting the sleep period.
  • the display device confirms that it does not need to transmit the first data or the second data, and enters the monitoring state at the time unit 7 .
  • the time threshold for keeping the listening state is preset, and it is assumed that the time threshold is 1 time unit. After confirming that the listening time meets the time threshold requirement, the display device enters a sleep state, and notifies the wireless screen projection device that it no longer receives the first data, thereby reducing power consumption.
  • the notification may be implemented as a power save notification.
  • the wireless screen projection device can continue to send the first data.
  • the wireless screen projection device can only continue to send the first data in response to a notification from the display device, a delay occurs in the transmission of the first data, for example, the delay is time unit 11 and time unit 12 .
  • the screen projection update response of the wireless screen projection device is slow, which affects the user experience.
  • an embodiment of the present application proposes a wireless screen projection method, which can ensure that the wireless screen projection device and the display device sleep when no data is transmitted during the wireless projection process, thereby reducing power consumption.
  • a wireless screen projection method which can ensure that the wireless screen projection device and the display device sleep when no data is transmitted during the wireless projection process, thereby reducing power consumption.
  • FIG. 5A is a schematic flowchart 1 of a wireless screen projection method provided by an embodiment of the present application. As shown in Figure 5A, the method includes S501-S503:
  • the wireless screen projection device determines the duration of the first transmission cycle according to the display frame rate when displaying the image.
  • the display frame rate is used to indicate the rate at which the wireless screen projection device displays the first image.
  • the first period is a period for transmitting the first data to the display device in the first transmission cycle.
  • the first transmission period can also be described as a video service period (VSP).
  • the first data includes a first image, and the first image includes, for example, a video image, an animation image, an image of a text file, and the like.
  • the first data may also include a control command sent by the wireless screen projection device to the display device, and the like.
  • the wireless screen projection device needs to determine the first transmission period of the wireless screen projection.
  • the duration of the first transmission period can satisfy the wireless screen projection device to transmit data according to the display frame rate, that is, the current first transmission period needs to satisfy the display frame rate using the display device to display the first image.
  • the first transmission period is the inverse of the display frame rate.
  • the wireless screen projection device determines that the display frame rate of the first image currently displayed is 40 Hz. After that, the wireless screen projection device determines that the duration of the first transmission period is 25ms according to the current display frame rate.
  • the wireless screen projection device determines a time domain resource for transmitting the first data, that is, determines the first period of time, according to the display frame rate, screen resolution, etc. when displaying the image. Subsequently, the wireless screen projection device utilizes the image data transmitted to the display device in the first period, so that the display device can display the first image according to the display frame rate, so as to realize screen projection display.
  • the wireless screen projection device in order to implement wireless screen projection, it should be prioritized that the wireless screen projection device transmits image data to the display device. Therefore, the first period of time should be preferentially configured in the first transmission cycle. That is, in the process of resource configuration in the first transmission period, the previous time domain resource is configured as the resource for transmitting the first data.
  • the wireless screen projection device determines the first transmission period to be 10 ms according to the display frame rate. As shown in FIG. 6 , the first transmission period includes 10 time units, and the duration of each time unit is 1 ms. The wireless screen projection device determines that it takes 6ms to transmit the first data, that is, it takes 6 time units. Therefore, time unit 1 - time unit 6 are configured as the first period.
  • the duration of the first period is shorter than the first transmission period.
  • the first data may also be described as downlink (down link, DL) data, and the first period may also be described as a DL duration (DL duration).
  • the wireless screen projection apparatus negotiates with the display apparatus to determine the time domain resource configuration of the first transmission period.
  • the wireless screen projection device can only determine the time domain resource configuration for transmitting the first data according to its own equipment conditions, but cannot determine the time domain resources required by the display device. Therefore, the wireless screen projection device needs to negotiate with the display device to determine the configuration of other time domain resources in the first transmission period. Subsequently, the wireless screen projection device and the display device can perform data transmission according to the same time domain resource configuration, so as to avoid data loss and realize wireless screen projection.
  • step S502 may be specifically implemented as the following steps S5021 to S5024.
  • the wireless screen projection device sends first information to the display device, where the first information is used to indicate the duration of the first transmission cycle and the duration of the first period.
  • the display device has not confirmed the display frame rate before starting to project the screen. Therefore, the wireless screen projection device needs to inform the display device of the duration of the first transmission cycle. In addition, the wireless screen projection device notifies the display device of the configured first time period in the first transmission cycle, and then the subsequent display device receives the first data sent by the wireless screen projection device in the determined first time period according to the first transmission cycle , to achieve screencasting. Further, the display device can configure the remaining time domain resources in the first transmission period according to the first period.
  • the manner in which the first information indicates the duration of the first transmission period and the duration of the first period may include an implicit notification manner or an explicit notification manner.
  • the implicit notification manner includes, for example, carrying information of the duration of the first transmission period and the duration of the first period in the first information.
  • the display notification method includes, for example, a preconfigured information reading method, which directly uses the first information to indicate the time domain resource configuration.
  • the first information is indication information, and after receiving the first information, the display device can determine the duration of the first transmission cycle indicated in the first information and the duration of the first period in a manner agreed with the wireless screen projection device in advance. duration.
  • the first information may be 111111XXXX.
  • each bit is used to represent 1 ms
  • the number of bits occupied by the first information is used to represent the duration of the first transmission period
  • a bit value of 1 indicates that it is used to transmit the first data.
  • the display device determines, according to the first information, a second period for sending the second data in a period other than the first period of the first transmission cycle.
  • the display device determines a second time period for transmitting the second data.
  • the second data includes, for example, data that needs to be fed back to the wireless screen projection device after the display device detects a touch or a key operation, image data collected by the display device, and the like.
  • the display device configures the second period in the remaining period in the first transmission cycle. That is, the display device sets the duration of the second period according to its own equipment conditions and data transmission requirements. Further, the display device can also configure a period other than the first period and the second period in the first transmission period as a third period for sleeping. That is, the first period, the second period and the third period are sequentially configured.
  • the display device determines that the transmission of the second data needs to occupy 1 ms, that is, a time domain resource of one time unit, and configures the time unit 7 as the second time period. It is further determined that the remaining time unit 8-time unit 10 in the first transmission cycle is configured as the third period.
  • the display device if the display device does not generate the second data, the display device does not need to configure the second period, or configures the second period to be zero. After the display device obtains the first information, according to the first transmission period and the first period, all the remaining periods in the first transmission period are determined as the third period.
  • the second data may also be described as uplink (up link, UL) data
  • the second period may also be described as a UL duration (UL duration).
  • the durations of the first period and the second period are shorter than the first transmission period.
  • the display device sends second information to the wireless screen projection device, where the second information is used to indicate the duration of the second time period.
  • the display device notifies the wireless screen projection device of the configured second time period by using the second information. Further, the subsequent wireless screen projection device receives the second data sent by the display device in the determined second time period according to the first transmission cycle, so as to realize information exchange.
  • the manner in which the second information indicates the duration of the second period may include an implicit notification manner or an explicit notification manner.
  • the implicit notification method includes the information of the duration of the second time period carried in the second information.
  • the display notification method includes, for example, a preconfigured information reading method, which directly uses the second information to indicate the time domain resource configuration.
  • the second information is indication information, and after receiving the second information, the wireless screen projection device can determine the duration of the second time period indicated in the second information in a manner pre-agreed with the display device.
  • the second information may be 1111110XXX.
  • a bit value of 0 indicates that it is used to transmit the second data.
  • the wireless screen projection device determines, according to the first period and the second period, a period other than the first period and the second period in the first transmission cycle as a third period, and the third period is a sleep period.
  • the wireless screen projection apparatus determines the remaining time domain resources in the first transmission cycle as the third period.
  • the display device can determine the same time domain resource configuration of the first transmission period as the wireless screen projection device. Therefore, the subsequent wireless screen projection device and the display device can utilize the same first transmission period resources to realize wireless screen projection, and the problem of data loss due to asymmetric time domain resource information will not be caused.
  • the second information may also be used to indicate the duration of the third time period configured by the display device. Furthermore, after receiving the second information, the wireless screen projection device can directly determine all the time-domain resource configurations of the first transmission period according to the second information, and the wireless screen projection device does not need to repeatedly configure the third time period, thereby increasing the resources of the first transmission period. Configuration efficiency.
  • the second information is used to indicate the second period and the third period.
  • the wireless screen projection device determines whether there is an abnormality in the resource configuration of the first transmission period according to the configuration of the second period and the third period. If there is no abnormality, start transmitting the first data. In this way, it is further ensured that the first transmission cycle resource configuration of the wireless screen projection device and the display device are the same, thereby ensuring normal screen projection.
  • the wireless screen projection device transmits the wireless screen projection data with the display device based on the first transmission period.
  • the wireless screen projection device performs one or more of the following according to the first transmission cycle: sending the first data to the display device in the first time period, receiving the second data sent by the display device in the second time period, and in the second time period. Sleep for three periods.
  • the wireless screen projection device sends the first data in the first period of time according to the first transmission cycle, and sleeps in the third period of time, so that the display device can be used to display the first image, Realize Wi-Fi wireless screen projection.
  • the wireless screen projection device and the display device perform Wi-Fi wireless screen projection according to the first transmission period, which can realize sleep in the third period while ensuring the screen projection according to the display frame rate of the wireless screen projection device.
  • the delay caused by hibernation is avoided, and the user experience is improved.
  • power consumption is saved and the life of the Wi-Fi chip is increased.
  • FIG. 7 is a schematic flowchart of another wireless screen projection method provided by an embodiment of the present application. As shown in FIG. 7 , before step S503 , the wireless screen projection device and the display device perform time calibration through steps S701 to S703 . In the embodiments of the present application, the time of the wireless screen projection device is used as the calibration reference, and the display device is calibrated according to the time of the wireless screen projection device as an example for description.
  • the wireless screen projection device determines the first time according to the local time and the duration of sending the third information.
  • the first time is determined by the wireless screen projection device according to the local time and the duration of sending the third information.
  • the third information is used to instruct the display device to calibrate the time of the display device according to the first time.
  • the wireless screen projection device is equipped with a Wi-Fi chip.
  • a TSF timer is configured in the Wi-Fi chip for TSF calibration.
  • the TSF timer can determine the local time of the wireless screencasting device. After that, if the local time needs to be sent, in the process of sending data, the device transmission will also generate a part of time-consuming. Therefore, the TSF timer needs to determine the first time according to the current local time of the wireless screen projection device and the possible time-consuming of sending the local time in the future, thereby ensuring that the display device obtains an accurate time reference.
  • the wireless screen projection device sends third information to the display device, where the third information is used to instruct the display device to calibrate the time of the display device according to the first time.
  • the third information may be implemented as a message, and the wireless screen projection device carries the first time in the message, thereby realizing sending the first time to the display device.
  • an embodiment of the present application provides a packet structure, including a packet header and data of the packet itself.
  • the message header information includes a physical header (phy preamble) of the message and a media access control address (media access control address, MAC) header.
  • the MAC header includes the destination address and the source address.
  • the message structure also includes a frame check sequence (FCS) for judging whether an error occurs in the current frame.
  • FCS frame check sequence
  • the display device determines the second time according to the first time and the duration of receiving the third information, and uses the second time to calibrate the local time.
  • the display device after receiving the third information, obtains the first time. As shown in FIG. 8 , in the process of receiving the third information, the display device also takes a certain time in the transmission path. Therefore, the TSF timer needs to determine the second time for time calibration according to the first time and the time consumption generated by transmitting the third information, and calibrate the local time according to the second time. For example, after the display device receives the message sent by the wireless screen projection device, it parses the first time carried in the message, and uses the first time to calibrate the local time.
  • the TSF timer in the wireless screen projection device determines that the local time is 5:00, the duration of transmitting the third information is 1 min, and the first time is determined to be 5:01.
  • the wireless screen projection device uses the third information to generate the first time to the display device.
  • the TSF timer in the display device determines that the first time is 5:01, the duration of transmitting the third information is 2 minutes, and the second time is determined to be 5:03. This further corrects the local time to 5:03.
  • the wireless screen projection device and the display device can realize real-time Wi-Fi wireless screen projection based on the same time and according to the configured first transmission cycle, so as to avoid screen projection abnormalities.
  • the time of the two is not aligned.
  • a second transmission period is configured, and during the wireless screen projection process, that is, in the process of performing step S503, the wireless screen projection device and the display device perform time calibration according to the second transmission period.
  • the time calibration process further includes step S704.
  • the wireless screen projection device cycles the above steps S701 to S703 according to the second transmission cycle to calibrate the time of the display device.
  • the wireless screen projection device and the display device can periodically send beacon frames to achieve time synchronization. Therefore, the second transmission period is configured as the period in which the beacon is sent. That is, the second transmission period is the beacon period, and the time calibration period in the Wi-Fi network is used to realize the time calibration of the wireless screen projection device and the display device. Then, the third information is implemented as a beacon frame.
  • performing time calibration on the wireless screen projection device and the display device according to the preset transmission period can ensure that the wireless screen projection device and the display device do not perform time misalignment during the Wi-Fi wireless screen projection according to the first transmission period.
  • the synchronization accuracy of the wireless screen projection device and the display device can reach ⁇ s level, and the transmission efficiency in the process of Wi-Fi wireless screen projection can be improved.
  • the wireless screen projection device and the display device perform time calibration according to the second transmission period, in order to ensure that between two time calibration points, the wireless screen projection device and the display device do not experience transmission abnormalities due to time misalignment.
  • the display device sends a request to the wireless screen projection device for requesting to sleep or wake up, thereby ensuring that the wireless screen projection device and the display device can sleep or wake up at the same time, thereby avoiding the loss of transmitted data.
  • the wireless screen projection device receives a first request sent by the display device, where the first request is used to request sleep.
  • the first request is a request sent by the display device at any of the following times: at the end of the second period, after sending the last second data, and at the end of the first period, after receiving the last first data.
  • the wireless screen projection device starts to sleep, and instructs the display device to sleep.
  • the wireless screen projection device carries a mark in the last first data sent, and after receiving the first data, the display device can confirm that the current data is the last first data according to the mark.
  • the display device sends a first request to the wireless screen projection device.
  • the wireless screen projection device After receiving the first request, the wireless screen projection device confirms whether the current time is the end of the second time period, and will enter the third time period. If it is confirmed that the time is not abnormal, in response to the first request, the wireless screen projection device and the display device enter a sleep state to reduce power consumption.
  • the wireless screen projection device receives a second request sent by the display device, and the second request is used to request to wake up.
  • the second request is a request sent by the display device after the end of the first transmission period.
  • the wireless screen projection device wakes up the display device and sends the first data to the display device.
  • the display device sends a second request to the wireless screen projection device.
  • the wireless screen projection device After the wireless screen projection device receives the second request, it confirms whether the current time is the end of the third time period, and will end the dormancy. If it is confirmed that the time is not abnormal, in response to the second request, the wireless screen projection device and the display device enter the wake-up state to ensure normal transmission of data in the next cycle.
  • changes in the time domain resources of the first transmission period may occur due to changes in the display frame rate and other reasons. Therefore, a preset period is configured, and the wireless screen projection device and the display device confirm whether the resource configuration of the first transmission period changes according to the preset period, and whether the first transmission period needs to be reconfigured. And/or, after determining that the display frame rate has changed, the wireless screen projection device notifies the display device to reconfigure the time domain resources of the first transmission period.
  • the method of reconfiguring the time domain resources of the first transmission period is the same as the method of configuring the time domain resources of the first transmission period, see the above steps for details, and will not be repeated here.
  • the wireless screen projection apparatus changes the first period determined by VSP_n+2, which is determined by 6
  • the time unit is reduced to 5 time units.
  • the wireless screen projection device notifies the display device to reconfigure the first transmission cycle.
  • the first period is time unit 1-time unit 5
  • the second period is time unit 6
  • the third period is time unit 7- Time Unit 10.
  • the wireless screen projection device confirms that the display frame rate becomes larger, and then re-determines the first transmission period to be 9 according to the changed display frame rate. time units, and the first period is 4 time units. In addition, the wireless screen projection device needs to notify the display device to reconfigure the first transmission period. As shown in Fig. 9(b), after the first transmission cycle is reconfigured, starting from VSP_n+2, the first period is time unit 1-time unit 4, the second period is time unit 5, and the third period is time unit 6- Time Unit 9.
  • the time domain resource configuration of the first transmission period is updated according to the preset period, so as to avoid abnormal transmission caused by changes in conditions such as the display frame rate.
  • each network element such as the wireless screen projection device and the display device.
  • each network element such as the wireless screen projection device and the display device.
  • it includes corresponding hardware structures and/or software modules for executing each function.
  • the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the electronic device may be divided into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned functional modules can be implemented in the form of hardware, and can also be implemented in the form of software functional modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. The following description takes the use of corresponding functions to divide each functional module as an example for description.
  • FIG. 10 (a) shows a possible schematic structural diagram of the wireless screen projection device involved in the above embodiment.
  • the wireless screen projection device 1000 may be a wireless screen projection device, or a chip built in the wireless screen projection device.
  • the wireless screen projection device 1000 includes a processing module 1001 , a sending module 1002 and a receiving module 1003 .
  • the processing module 1001 is configured to support the wireless screen projection device 1000 to perform one or more of steps S501 and S5024 in the above embodiments; and/or, the processing module 1001 is further configured to support the wireless screen projection device 1000 to perform this procedure. Other steps performed by the wireless screen projection device in the application embodiments.
  • the sending module 1002 is configured to support the wireless screen projection device 1000 to perform one or more of steps S502, S503 and S5021 in the above embodiments. And/or, the sending module 1002 is further configured to support the wireless screen projection apparatus 1000 to perform other steps performed by the wireless screen projection apparatus in the embodiments of the present application.
  • the receiving module 1003 is configured to support the wireless screen projection device 1000 to perform one or more of steps S502, S503 and S5023 in the above embodiments. And/or, the receiving module 1003 is further configured to support the wireless screen projection apparatus 1000 to perform other steps performed by the wireless screen projection apparatus in the embodiments of the present application.
  • the processing module 1001 involved in the wireless screen projection device 1000 shown in FIG. 10(a) can be implemented by a processor or a processor-related circuit component, and can be a processor or a processing unit.
  • the sending module 1002 can be a transmitter
  • the receiving module 1003 can be a receiver
  • the sending module 1002 and the receiving module 1003 can be combined into a transceiver unit
  • the transceiver unit can be implemented by a transceiver or a transceiver-related circuit component, and can be a transceiver or a transceiver unit.
  • a transceiver may also be referred to as a communication interface or a transceiver.
  • the processing module 1001 is usually integrated in a system on chip (system on chip, SOC) 1004 .
  • the sending module 1002 and the receiving module 1003 are integrated in a Wi-Fi chip 1005 .
  • the Wi-Fi chip 1005 also integrates some functions of the processing module 1001 .
  • the Wi-Fi chip 1005 is used to support the wireless screen projection device 1000 to perform step S701 , step S702 , step S703 and step S704 in the above embodiment.
  • the wireless screen projection device 1000 shown in (a) in FIG. 10 may further include a storage module (not shown in (a) in FIG. 10 ), where the storage module stores programs or instructions.
  • the processing module executes the program or instruction
  • the wireless screen projection device 1000 shown in (a) of FIG. 10 can execute the wireless screen projection method shown in FIG. 5A , FIG. 5B and FIG. 7 .
  • FIG. 11( a ) shows a possible schematic structural diagram of the display device involved in the above embodiment.
  • the display device 1100 may be a display device, or a chip built in the display device, and the display device 1100 includes a processing module 1101 , a receiving module 1102 and a sending module 1103 .
  • the processing module 1101 is configured to support the display device 1100 to perform step S5022 in the above embodiments; and/or the processing module 1101 is further configured to support the display device 1100 to perform other steps performed by the display device in the embodiments of the present application.
  • the receiving module 1102 is configured to support the display device 1100 to perform one or more of steps S502 , S503 and S5021 in the above embodiments. And/or, the receiving module 1102 is further configured to support the display device 1100 to perform other steps performed by the display device in the embodiments of the present application.
  • the sending module 1103 is configured to support the display device 1100 to perform one or more steps of step S502, step S503 and step S5023 in the above embodiments. And/or, the sending module 1103 is further configured to support the display device 1100 to perform other steps performed by the display device in the embodiments of the present application.
  • the display device 1100 further includes a display module configured to display an image based on the wireless screen projection data.
  • the processing module 1101 involved in the display device 1100 shown in FIG. 11( a ) may be implemented by a processor or processor-related circuit components, and may be a processor or a processing unit.
  • the receiving module 1102 may be a transmitter
  • the transmitting module 1103 may be a receiver
  • the receiving module 1102 and the transmitting module 1103 may be combined into a transceiver unit
  • the transceiver unit may be implemented by a transceiver or a transceiver-related circuit component, and may be a transceiver or a transceiver unit
  • a transceiver may also be referred to as a communication interface or a transceiver.
  • the processing module 1101 is usually integrated in the SOC chip 1104 .
  • the receiving module 1102 and the sending module 1103 are integrated in a Wi-Fi chip 1105 .
  • the Wi-Fi chip 1105 also integrates some functions of the processing module 1101 .
  • the Wi-Fi chip 1105 is used to support the display device 1100 to perform step S701, step S702, step S703 and step S704 in the above embodiment.
  • the display device 1100 shown in (a) of FIG. 11 may further include a storage module (not shown in (a) of FIG. 11 ), and the storage module stores programs or instructions.
  • the processing module executes the program or instruction
  • the display device 1100 shown in (a) of FIG. 11 can execute the wireless screen projection method shown in FIG. 5A , FIG. 5B and FIG. 7 .
  • Embodiments of the present application provide an information transmission system, including a wireless screen projection device and a display device.
  • the wireless screen projection device is the transmitting end device
  • the display device is the receiving end device.
  • the wireless screen projection device is used for performing step S501, step S502 and step S503 in FIG. 5A, and/or for performing one or more steps in step S5021, step S5023 and step S5024 in FIG. 5B, and/or Or for performing one or more of steps S701, S702, and S704 in FIG. 7, and/or other processes for performing the techniques described herein.
  • the display device is used for performing steps S502 and S503 in FIG. 5A , and/or for performing one or more of steps S5021 , S5022 and S5023 in FIG. 5B , and/or for performing the steps in FIG. 7 .
  • An embodiment of the present application further provides a chip system, including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements the method in any of the foregoing method embodiments.
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the chip system can be a field programmable gate array (field programmable gate array, FPGA), can be an application-specific integrated circuit (application specific integrated circuit, ASIC), can also be a SoC chip, a Wi-Fi chip, or It is a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • SoC chip SoC chip
  • Wi-Fi chip or It is a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller unit).
  • MCU programmable logic device
  • PLD programmable logic device
  • each step in the above method embodiments may be implemented by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application further provide a storage medium for storing instructions used by the above wireless screen projection device.
  • Embodiments of the present application further provide a computer-readable storage medium, where computer-readable instructions are stored in the computer-readable storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute any of the above methods. methods in the examples.
  • Embodiments of the present application also provide a computer program product, such as a computer-readable storage medium, including a program designed to execute the steps performed by the wireless screen projection apparatus in the foregoing embodiments.
  • the steps of the methods or algorithms described in conjunction with the disclosure of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (RAM), flash memory, read only memory (ROM), erasable programmable read only memory (erasable programmable ROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium well known in the art.
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium may reside in an application specific integrated circuit (ASIC).
  • ASIC application specific integrated circuit
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be Combinations can either be integrated into another system, or some features can be omitted, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium.
  • the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请实施例公开了一种无线投屏方法、装置及系统;涉及通信技术领域。该方法包括:无线投屏装置根据无线投屏装置显示图像时的显示帧率,确定第一传输周期的时长。无线投屏装置与显示装置协商确定第一传输周期的时域资源配置;第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,第一时段用于向显示装置发送第一数据,第二时段用于接收显示装置发送的第二数据,第三时段用于休眠。无线投屏装置基于第一传输周期与显示装置进行无线投屏数据的传输。能够利用显示帧率,确定传输周期,并在传输周期中配置用于休眠的时段,降低Wi-Fi芯片功耗。

Description

无线投屏方法、装置及系统 技术领域
本申请实施例涉及通信技术领域,尤其涉及一种无线投屏方法、装置及系统。
背景技术
随着通信技术的发展,手机,电脑等电子设备利用无线投屏技术,通过无线保真(wireless fidelity,Wi-Fi)网络,能够将本地显示屏显示内容投射到如电视等具有较大显示屏的电子设备上显示。以获得更好的显示效果,提高用户观影或游戏的使用体验。
目前,在无线投屏过程中,电子设备需要按照Wi-Fi休眠周期进行休眠。而电子设备的显示帧率较高,传输一帧图像所用时长较短,而Wi-Fi传输或休眠的周期较长。若电子设备休眠,则会导致无法按照显示帧率传输图像,影响Wi-Fi投屏效果。因此,电子设备即使在无数据传输的情况下,也需要保持监听状态,无法休眠,导致Wi-Fi芯片功耗的增加,进而影响Wi-Fi芯片的使用寿命。
发明内容
本申请的实施例提供一种无线投屏方法、装置及系统,能够利用显示帧率,确定传输周期,并在传输周期中配置用于休眠的时段。按照传输周期传输数据,能够有效降低Wi-Fi芯片功耗。
第一方面,本申请实施例提供一种无线投屏方法,该方法可以由无线投屏装置执行,也可以由无线投屏装置中的组件(比如芯片系统)执行,该方法包括:无线投屏装置根据无线投屏装置显示图像时的显示帧率,确定第一传输周期的时长。无线投屏装置与显示装置协商确定第一传输周期的时域资源配置。其中,第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,第一时段用于向显示装置发送第一数据,第二时段用于接收显示装置发送的第二数据,第三时段用于休眠。无线投屏装置基于第一传输周期与显示装置进行无线投屏数据的传输。
其中,第一数据包括第一图像,第一图像例如包括视频图像,动画图像,文本文件图像等。第一数据还可以包括无线投屏装置向显示装置发送的控制命令等。第二数据例如包括显示装置检测到触摸或按键操作后需要向无线投屏装置反馈的数据,显示装置采集的图像数据等。通过第一数据和第二数据的交互传输,实现无线投屏。
在一些实施例中,若显示装置不会产生第二数据,则显示装置不需要配置第二时段,或者将第二时段配置为零。显示装置获得第一信息后,根据第一传输周期以及第一时段,将第一传输周期中的剩余时段全部确定为第三时段。
如此,在无线投屏装置利用显示装置进行无线投屏的过程中,能够按照第一传输周期进行无线投屏数据的传输,避免出现数据丢失的问题。其中,无线投屏装置和显示装置确定的第一传输周期的时域资源配置相同,因此,能够保证在第三时段均处于休眠状态。且不会出现由于休眠导致的时延问题,在降低功耗的同时提升用户的使用体验。
在一种可能的实现方式中,无线投屏装置与显示装置协商确定第一传输周期的时 域资源配置,包括:无线投屏装置向显示装置发送第一信息,第一信息用于指示第一传输周期的时长,以及第一时段的时长。无线投屏装置接收显示装置响应于第一信息而发送的第二信息,第二信息用于指示第二时段的时长。无线投屏装置根据第一时段的时长以及第二时段的时长,将第一传输周期中的剩余时段设置为第三时段。
可选的,第一信息指示第一传输周期的时长以及第一时段的时长的方式,可以包括隐式通知方式或显示通知方式。其中,隐式通知方式,包括在第一信息中携带第一传输周期的时长以及第一时段的时长的信息。显示通知方式包括预配置信息读取方式,直接利用第一信息指示时域资源配置。例如,第一信息为指示信息,显示装置在接收到第一信息后,能够按照预先与无线投屏装置约定的方式,确定第一信息中指示的第一传输周期的时长,以及第一时段的时长。
示例性的,假设第一传输周期的时长为10ms,第一时段的时长为6ms,则第一信息可以为111111XXXX。其中,每一比特位用于表示1ms,第一信息占用的比特位数量用于表示第一传输周期的时长,比特位取值为1表示用于传输第一数据。
如此,显示装置在接收到第一信息后,能够根据第一时段的时长,配置第一传输周期中剩余时段的时域资源。
可选的,第二信息指示第二时段的时长的方式,可以包括隐式通知方式或显示通知方式。其中,隐式通知方式,包括在第二信息中携带第二时段的时长的信息。显示通知方式包括预配置信息读取方式,直接利用第二信息指示时域资源配置。例如,第二信息为指示信息,无线投屏装置在接收到第二信息后,能够按照预先与显示装置约定的方式,确定第二信息中指示的第二时段的时长。
示例性的,假设第一传输周期的时长为10ms,第一时段的时长为6ms,第二时段时长为1ms,则第二信息可以为1111110XXX。其中,比特位取值为0表示用于传输第二数据。
如此,无线投屏装置在接收到第二信息后,能够根据第二时段的时长,将剩余的时段配置为用于休眠的第三时段。并且,通过第一信息和第二信息的交互,能够保证无线投屏装置和显示装置确定相同的传输周期和休眠时段。
在一种可能的实现方式中,在第一传输周期中,第一时段,第二时段以及第三时段顺序配置。
在一些实施例中,为了实现无线投屏,应优先保证无线投屏装置将图像数据发送至显示装置,因此,在第一传输周期中应优先配置第一时段。即在第一传输周期资源配置的过程中,将在先的时域资源配置为用于传输第一数据的资源。之后,再顺序配置第二时段和第三时段。
可以理解的是,第一时段和第二时段的时长应小于第一传输周期。
在一种可能的实现方式中,在无线投屏装置基于第一传输周期与显示装置传输数据之前,该方法还包括:无线投屏装置向显示装置发送第三信息,第三信息用于指示显示装置,根据第一时间校准显示装置的时间;第一时间为无线投屏装置根据本地时间以及发送第三信息的时长确定。
在一些实施例中,在第一传输周期配置完成后,若需要保证无线投屏装置和显示装置按照第一传输周期实时进行数据传输,则需要保证无线投屏装置和显示装置的时 间同步。那么,在开始投屏之前,还需要对无线投屏装置和显示装置的时间进行校准。
如此,通过时间校准,保证无线投屏装置和显示装置的本地时间相同。无线投屏装置和显示装置能够基于相同的时间,按照已配置的第一传输周期,实现实时Wi-Fi无线投屏,避免出现投屏异常。
在一些实施例中,在Wi-Fi网络中STA按照固定周期发送beacon帧进行时间同步。因此,Wi-Fi芯片中配置有TSF定时器,用于进行TSF校准。TSF定时器能够确定无线投屏装置的本地时间。之后,若需要发送本地时间,在发送数据的过程中,器件传输还会产生一部分耗时。因此,TSF定时器需要根据当前无线投屏装置的本地时间和未来发送本地时间可能产生的耗时,确定第一时间,进而保证显示装置获得准确的时间基准。
在一种可能的实现方式中,该方法还包括:无线投屏装置按照第二传输周期向显示装置发送第三信息,第二传输周期为信标beacon周期。
在一些实施例中,为了避免在投屏过程中,无线投屏装置和/或显示装置的本地时间变化,而导致的两者时间不对齐。配置第二传输周期,在无线投屏过程中,无线投屏装置和显示装置按照第二传输周期进行时间校准。其中,若要实现Wi-Fi无线投屏,则需要保证无线投屏装置和显示装置连接到同一个Wi-Fi网络中。在TSF机制中,无线投屏装置和显示装置之间能够利用周期性发送beacon帧,实现时间同步。因此,将第二传输周期配置为发送beacon的周期。
在一种可能的实现方式中,该方法还包括:无线投屏装置按照第一传输周期,执行如下一项或几项内容:在第一时段向显示装置发送第一数据,在第二时段接收显示装置发送的第二数据,在第三时段进行休眠。
如此,按照已配置的第一传输周期的时域资源进行数据传输,能够避免数据丢失,实现无线投屏。并且,能够在相同的时间段进行休眠,降低Wi-Fi芯片功耗。
在一种可能的实现方式中,该方法还包括:无线投屏装置接收显示装置发送的第一请求,第一请求用于请求休眠,第一请求为显示装置在如下任一时刻发送的请求:第二时段末尾,发送最后一个第二数据后,第一时段末尾,接收最后一个第一数据后。响应于第一请求,无线投屏装置指示显示装置休眠后,无线投屏装置开始休眠。
在一些实施例中,无线投屏装置在发送的最后一个第一数据中携带标记,显示装置在接收到该第一数据后,根据标记能够确认当前数据为最后一个第一数据。
在一种可能的实现方式中,该方法还包括:无线投屏装置接收显示装置发送的第二请求,第二请求用于请求唤醒;第二请求为显示装置在第一传输周期结束后发送的请求。响应于第二请求,无线投屏装置唤醒显示装置,并向显示装置发送第一数据。
如此,在休眠时段前后,显示装置向无线投屏装置发送请求,用于请求休眠或唤醒,进而保证无线投屏装置和显示装置能够同时休眠或唤醒,从而避免传输的数据丢失。具体的,无线投屏装置和显示装置按照第二传输周期进行时间校准,保证在两个时间校准点之间,无线投屏装置和显示装置不会出现由于时间未对齐导致的传输异常。
在一种可能的实现方式中,第一传输周期的时长满足无线投屏装置按照显示帧率进行无线投屏数据的传输。
在一种可能的实现方式中,第一传输周期为显示帧率的倒数。
如此,无线投屏装置根据显示第一图像的显示帧率,确定第一传输周期。进而确保当前显示的第一图像,能够正常无线投屏。
第二方面,本申请实施例提供一种无线投屏方法,该方法可以由显示装置执行,也可以由显示装置中的组件(比如芯片系统)执行,该方法包括:显示装置与无线投屏装置协商确定第一传输周期的时域资源配置。其中,第一传输周期的时长为无线投屏装置根据显示图像时的显示帧率确定;第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,第一时段用于接收无线投屏装置发送的第一数据,第二时段为显示装置确定用于向无线投屏装置发送第二数据的时段,第三时段用于休眠。显示装置基于第一传输周期与无线投屏装置进行无线投屏数据的传输,并显示图像。
在一种可能的实现方式中,显示装置与无线投屏装置协商确定第一传输周期的时域资源配置,包括:显示装置接收无线投屏装置发送的第一信息,第一信息用于指示第一传输周期的时长,以及第一时段的时长;响应于第一信息,显示装置向无线投屏装置发送第二信息,第二信息用于指示第二时段的时长;显示装置根据第一时段的时长以及第二时段的时长,将第一传输周期中的剩余时段设置为第三时段。
在一种可能的实现方式中,在第一传输周期中,第一时段,第二时段以及第三时段顺序配置。
在一种可能的实现方式中,在显示装置基于第一传输周期与无线投屏装置传输数据之前,该方法还包括:显示装置接收无线投屏装置发送的第三信息,获得第一时间。显示装置根据第一时间以及接收第三信息的时长,确定第二时间。显示装置利用第二时间,校准本地时间。
在一种可能的实现方式中,该方法还包括:显示装置按照第二传输周期接收无线投屏装置发送的第三信息,第二传输周期为信标beacon周期。
在一种可能的实现方式中,该方法还包括:显示装置按照第一传输周期,执行如下一项或几项内容:在第一时段接收无线投屏装置发送的第一数据,在第二时段向无线投屏装置发送第二数据,在第三时段进行休眠。
在一种可能的实现方式中,该方法还包括:显示装置向无线投屏装置发送第一请求,第一请求用于请求休眠,第一请求在如下任一时刻发送:第二时段末尾,发送最后一个第二数据后,第一时段末尾,接收最后一个第一数据后。显示装置在确定无线投屏装置接收到第一请求后,开始休眠。
在一种可能的实现方式中,该方法还包括:显示装置在第一传输周期结束后,向无线投屏装置发送第二请求,第二请求用于请求唤醒。显示装置在确定无线投屏装置接收到第二请求后唤醒,并开始接收第一数据。
在一种可能的实现方式中,第一传输周期的时长满足显示装置按照显示帧率显示图像。
在一种可能的实现方式中,第一传输周期为显示帧率的倒数。
此外,第二方面所述的无线投屏方法的技术效果可以参考第一方面所述的无线投屏方法的技术效果,此处不再赘述。
第三方面,本申请实施例提供一种无线投屏装置,该装置可以包括:处理模块和收发模块。其中,处理模块,用于根据无线投屏装置显示图像时的显示帧率,确定第 一传输周期的时长。处理模块,还用于与显示装置协商确定第一传输周期的时域资源配置;其中,第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,第一时段用于向显示装置发送第一数据,第二时段用于接收显示装置发送的第二数据,第三时段用于休眠。收发模块,用于基于第一传输周期与显示装置进行无线投屏数据的传输。
在一种可能的实现方式中,收发模块,具体用于向显示装置发送第一信息,第一信息用于指示第一传输周期的时长,以及第一时段的时长。并且,接收显示装置响应于第一信息而发送的第二信息,第二信息用于指示第二时段的时长。处理模块,具体用于根据第一时段的时长以及第二时段的时长,将第一传输周期中的剩余时段设置为第三时段。
在一种可能的实现方式中,在第一传输周期中,第一时段,第二时段以及第三时段顺序配置。
在一种可能的实现方式中,收发模块,还用于向显示装置发送第三信息,第三信息用于指示显示装置,根据第一时间校准显示装置的时间。
在一种可能的实现方式中,第一时间为处理模块根据本地时间以及发送第三信息的时长确定。
在一种可能的实现方式中,收发模块,还用于按照第二传输周期向显示装置发送第三信息,第二传输周期为信标beacon周期。
在一种可能的实现方式中,收发模块,还用于按照第一传输周期,执行如下一项或几项内容:在第一时段向显示装置发送第一数据,在第二时段接收显示装置发送的第二数据,在第三时段进行休眠。
在一种可能的实现方式中,收发模块,还用于接收显示装置发送的第一请求,第一请求用于请求休眠,第一请求为显示装置在如下任一时刻发送的请求:第二时段末尾,发送最后一个第二数据后,第一时段末尾,接收最后一个第一数据后;处理器,还用于响应于第一请求,指示显示装置休眠后,控制收发模块开始休眠。
在一种可能的实现方式中,收发模块,还用于接收显示装置发送的第二请求,第二请求用于请求唤醒;第二请求为显示装置在第一传输周期结束后发送的请求。处理模块,还用于响应于第二请求,唤醒显示装置,并控制收发模块向显示装置发送第一数据。
在一种可能的实现方式中,第一传输周期的时长满足按照显示帧率进行无线投屏数据的传输。
在一种可能的实现方式中,第一传输周期为显示帧率的倒数。
可选的,收发模块可以包括发送模块和接收模块。其中,发送模块,用于向显示装置发送无线投屏数据。接收模块,用于接收显示装置发送的无线投屏数据。本申请实施例对于收发模块的具体实现方式,不做具体限定。
可选的,第三方面所述的无线投屏装置还可以包括存储模块,该存储模块存储有程序或指令。当处理模块执行该程序或指令时,使得第三方面所述的无线投屏装置可以执行第一方面所述的无线投屏方法。
需要说明的是,第三方面所述的无线投屏装置可以是无线投屏装置或可设置于无 线投屏装置的芯片(系统)或其他部件或组件,本申请对此不做限定。
此外,第三方面所述的无线投屏装置的技术效果可以参考第一方面所述的无线投屏方法的技术效果,此处不再赘述。
第四方面,本申请实施例提供一种显示装置,该装置可以包括:收发模块,处理模块和显示模块。其中,处理模块,用于与无线投屏装置协商确定第一传输周期的时域资源配置;其中,第一传输周期的时长为无线投屏装置根据显示图像时的显示帧率确定;第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,第一时段用于接收无线投屏装置发送的第一数据,第二时段为处理模块确定用于向无线投屏装置发送第二数据的时段,第三时段用于休眠;收发模块,用于基于第一传输周期与无线投屏装置进行无线投屏数据的传输。显示模块,用于基于无线投屏数据,显示图像。
在一种可能的实现方式中,收发模块,具体用于接收无线投屏装置发送的第一信息,第一信息用于指示第一传输周期的时长,以及第一时段的时长。并且,收发模块,还用于向无线投屏装置发送第二信息,第二信息用于指示第二时段的时长。处理模块,具体用于根据第一时段的时长以及第二时段的时长,将第一传输周期中的剩余时段设置为第三时段。
在一种可能的实现方式中,在第一传输周期中,第一时段,第二时段以及第三时段顺序配置。
在一种可能的实现方式中,收发模块,还用于接收无线投屏装置发送的第三信息,获得第一时间。收发模块,具体用于根据第一时间以及接收第三信息的时长,确定第二时间;利用第二时间,校准本地时间。
在一种可能的实现方式中,收发模块,还用于按照第二传输周期接收无线投屏装置发送的第三信息,第二传输周期为信标beacon周期。
在一种可能的实现方式中,收发模块,还用于按照第一传输周期,执行如下一项或几项内容:在第一时段接收无线投屏装置发送的第一数据,在第二时段向无线投屏装置发送第二数据,在第三时段进行休眠。
在一种可能的实现方式中,收发模块,还用于向无线投屏装置发送第一请求,第一请求用于请求休眠,第一请求在如下任一时刻发送:第二时段末尾,发送最后一个第二数据后,第一时段末尾,接收最后一个第一数据后。收发模块,还用于在确定无线投屏装置接收到第一请求后,开始休眠。
在一种可能的实现方式中,收发模块,还用于在第一传输周期结束后,向无线投屏装置发送第二请求,第二请求用于请求唤醒。收发模块,还用于在确定无线投屏装置接收到第二请求后唤醒,并开始接收第一数据。
在一种可能的实现方式中,第一传输周期的时长满足显示模块按照显示帧率显示图像。
在一种可能的实现方式中,第一传输周期为显示帧率的倒数。
可选的,收发模块可以包括接收模块和发送模块。其中,接收模块,用于接收无线投屏装置发送的无线投屏数据。发送模块,用于向无线投屏装置发送无线投屏数据。本申请实施例对于收发模块的具体实现方式,不做具体限定。
可选的,第四方面所述的显示装置还可以包括存储模块,该存储模块存储有程序或指令。当处理模块执行该程序或指令时,使得第四方面所述的显示装置可以执行第二方面所述的无线投屏方法。
需要说明的是,第四方面所述的显示装置可以是显示装置或可设置于显示装置的芯片(系统)或其他部件或组件,本申请对此不做限定。
此外,第四方面所述的显示装置的技术效果可以参考第一方面所述的无线投屏方法的技术效果,此处不再赘述。
第五方面,本申请实施例提供一种无线投屏装置,该装置可以包括:处理器和收发机。其中,处理器,用于:根据无线投屏装置显示图像时的显示帧率,确定第一传输周期的时长。并通过与显示装置协商,确定第一传输周期的时域资源配置;其中,第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,第一时段用于向显示装置发送第一数据,第二时段用于接收显示装置发送的第二数据,第三时段用于休眠。收发机,用于基于第一传输周期与显示装置进行无线投屏数据的传输。
在一种可能的实现方式中,收发机,具体用于:向显示装置发送第一信息,第一信息用于指示第一传输周期的时长,以及第一时段的时长。接收显示装置响应于第一信息而发送的第二信息,第二信息用于指示第二时段的时长。处理器,具体用于根据第一时段的时长以及第二时段的时长,将第一传输周期中的剩余时段设置为第三时段。
在一种可能的实现方式中,其特征在于,在第一传输周期中,第一时段,第二时段以及第三时段顺序配置。
在一种可能的实现方式中,收发机,还用于向显示装置发送第三信息,第三信息用于指示显示装置根据第一时间校准显示装置的时间;第一时间为收发机根据本地时间以及发送第三信息的时长确定。
在一种可能的实现方式中,收发机,还用于按照第二传输周期向显示装置发送第三信息,第二传输周期为信标beacon周期。
在一种可能的实现方式中,收发机,还用于接收显示装置发送的第一请求,第一请求用于请求休眠,第一请求为显示装置在如下任一时刻发送的请求:第二时段末尾,发送最后一个第二数据后,第一时段末尾,接收最后一个第一数据后。处理器,还用于响应于第一请求,指示显示装置休眠后,控制收发机休眠。
在一种可能的实现方式中,收发机,还用于接收显示装置发送的第二请求,第二请求用于请求唤醒;第二请求为显示装置在第一传输周期结束后发送的请求。处理器,还用于响应于第二请求,唤醒显示装置,并控制收发机向显示装置发送第一数据。
在一种可能的实现方式中,第一传输周期的时长满足收发机按照显示帧率进行无线投屏数据的传输。
在一种可能的实现方式中,第一传输周期为显示帧率的倒数。
此外,第五方面所述的无线投屏装置的技术效果可以参考第一方面所述的无线投屏方法的技术效果,此处不再赘述。
第六方面,本申请实施例提供一种显示装置,该装置可以包括:处理器,收发机和显示屏。其中,处理器,用于与无线投屏装置协商确定第一传输周期的时域资源配置;其中,第一传输周期的时长为无线投屏装置根据显示图像时的显示帧率确定;第 一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,第一时段用于接收无线投屏装置发送的第一数据,第二时段为处理器确定用于向无线投屏装置发送第二数据的时段,第三时段用于休眠。收发机,用于基于第一传输周期与无线投屏装置进行无线投屏数据的传输。显示屏,用于基于无线投屏数据,显示图像。
在一种可能的实现方式中,收发机,具体用于:接收无线投屏装置发送的第一信息,第一信息用于指示第一传输周期的时长,以及第一时段的时长。向无线投屏装置发送第二信息,第二信息用于指示第二时段的时长。处理器,具体用于根据第一时段的时长以及第二时段的时长,将第一传输周期中的剩余时段设置为第三时段。
在一种可能的实现方式中,在第一传输周期中,第一时段,第二时段以及第三时段顺序配置。
在一种可能的实现方式中,收发机,还用于接收无线投屏装置发送的第三信息,获得第一时间;以及根据第一时间和接收第三信息的时长,确定第二时间;利用第二时间,校准本地时间。
在一种可能的实现方式中,收发机,还用于按照第二传输周期接收无线投屏装置发送的第三信息,第二传输周期为信标beacon周期。
在一种可能的实现方式中,收发机,还用于向无线投屏装置发送第一请求,第一请求用于请求休眠,第一请求在如下任一时刻发送:第二时段末尾,发送最后一个第二数据后,第一时段末尾,接收最后一个第一数据后。处理器,还用于在确定无线投屏装置接收到第一请求后,控制收发机休眠。
在一种可能的实现方式中,收发机,还用于在第一传输周期结束后,向无线投屏装置发送第二请求,第二请求用于请求唤醒。处理器,还用于在确定无线投屏装置接收到第二请求后唤醒收发机,并控制收发机接收第一数据。
在一种可能的实现方式中,第一传输周期的时长满足显示屏按照显示帧率显示图像。
在一种可能的实现方式中,第一传输周期为显示帧率的倒数。
此外,第六方面所述的显示装置的技术效果可以参考第二方面所述的无线投屏方法的技术效果,此处不再赘述。
第七方面,本申请实施例提供一种无线投屏设备,包括:包括:处理器和存储器。存储器,用于存储计算机程序。处理器,用于执行存储器中存储的计算机程序,以使得无线投屏设备执行如上述第一方面和第二方面,以及其中任一种可能的实现方式中所述的方法。
第八方面,本申请实施例提供一种无线投屏设备,该设备包括:处理器和接口电路。接口电路,用于接收代码指令并传输至所述处理器。处理器用于运行所述代码指令以执行如上述第一方面和第二方面,以及其中任一种可能的实现方式中所述的方法。
第九方面,本申请实施例提供了一种无线投屏设备,该设备可以为芯片系统,该芯片系统包括处理器,还可以包括存储器,用于实现如上述第一方面和第二方面,以及其中任一种可能的实现方式中所述的方法的功能。该芯片系统可以由芯片构成,也可以包含芯片和其他分立器件。
第十方面,本申请实施例提供一种无线投屏设备,该设备可以为电路系统,电路 系统包括处理电路,处理电路被配置为执行如上述第一方面和第二方面,以及其中任一种可能的实现方式中所述的方法。
第十一方面,本申请实施例提供一种计算机可读存储介质,所述计算机可读存储介质中存储有指令,当所述指令被执行时,使如上述第一方面和第二方面,以及其中任一种可能的实现方式中所述的方法被实现。
第十二方面,本申请实施例提供一种包含指令的计算机程序产品,当所述计算机程序产品在计算机上运行时,使得所述计算机执行如上述第一方面和第二方面,以及其中任一种可能的实现方式中所述的方法。
第十三方面,本申请实施例提供一种芯片,该芯片包括:处理器和接口电路。接口电路,用于接收代码指令并传输至所述处理器。处理器用于运行所述代码指令以执行如上述第一方面和第二方面,以及其中任一种可能的实现方式中所述的方法。
第十四方面,本申请实施例提供一种无线投屏系统,包括无线投屏装置和显示装置。其中,无线投屏装置可用于实现上述第一方面以及其中任一种可能的实现方式所述的方法。显示装置可用于实现上述第二方面以及其中任一种可能的实现方式所述的方法。
附图说明
图1A为本申请实施例提供的通信系统的结构示意图;
图1B为本申请实施例提供的无线投屏方法应用场景示意图一;
图1C为本申请实施例提供的无线投屏方法应用场景示意图二;
图2为本申请实施例提供的通信装置的结构示意图一;
图3为本申请实施例提供的现有技术中无线投屏方法的帧结构示意图一;
图4为本申请实施例提供的现有技术中无线投屏方法的帧结构示意图二;
图5A为本申请实施例提供的无线投屏方法流程示意图一;
图5B为本申请实施例提供的无线投屏方法流程示意图二;
图6为本申请实施例提供的无线投屏方法的帧结构示意图一;
图7为本申请实施例提供的无线投屏方法流程示意图三;
图8为本申请实施例提供的Wi-Fi芯片结构以及报文结构示意图;
图9为本申请实施例提供的无线投屏方法的帧结构示意图二;
图10为本申请实施例提供的无线投屏装置的结构示意图;
图11为本申请实施例提供的显示装置的结构示意图。
具体实施方式
下面结合附图对本申请实施例提供的一种无线投屏方法、装置及系统进行详细地描述。
首先,为了便于理解,下面先对本申请实施例可能涉及的相关术语和概念进行介绍。
(1)显示帧率
显示帧率(frame rate)用于表示以帧为单位的图像连续出现在显示器上的频率(也可以称之为速率),单位为赫兹(Hz)。具体的,显示帧率用于描述电子设备每秒显示的图像数量。如显示帧率为40Hz,则表示电子设备每秒显示40张图像。
其中,显示帧率还用于表示电子设备显示画面的流畅度,显示帧率越高,画面越流畅,越能实现更加逼真的显示效果。一般的,游戏或电影画面的显示帧率较高,会议或办公投影画面的显示帧率较低。
(2)定时同步功能(timer synchronization function,TSF)
在无线局域网标准中定义了无线接入点(access point,AP)和站点(station,STA)之间的数据交互模式。其中,每一个连接到无线网络中的电子设备都可称之为一个站点。在低功耗Wi-Fi系统中,若AP和STA之间没有数据传输,STA进入低功耗模式。协议中用TSF机制来保证AP和STA之间的时间同步。具体的,AP需要周期性的发送信标(beacon)帧,STA需要周期性的唤醒以接收该beacon帧。如STA初始化TSF计时器,并利用beacon帧来向其他AP设备告知自己的本地时间,并且设置发送beacon帧的时间戳,实现时间同步。
示例性的,在Wi-Fi网络中,STA传输或休眠周期一般为100ms,在低功耗状态时,STA每100ms发送一次beacon帧进行时间同步。基于此,电子设备显示帧率一般无法与Wi-Fi休眠周期对齐。例如,电子设备显示帧率为30Hz,则传输一张图像的时间约为33.33ms,与100m无法成倍对齐。若电子设备按照Wi-Fi休眠周期休眠,则会导致其无法按照显示帧率传输图像。
图1A为本申请实施例提供的一种无线投屏方法应用的通信系统的示意图。如图1A所示,该通信系统包括无线投屏装置100和显示装置200。无线投屏装置100和显示装置200之间可以通过无线网络连接。比如,通过Wi-Fi网络连接。
在一些实施例中,无线投屏装置100通过Wi-Fi网络将屏幕显示的内容发送至显示装置200,由显示装置200进行显示。即在无线投屏过程中,无线投屏装置100和显示装置200的显示内容相同。
可选的,上述无线投屏装置100例如包括手机、平板电脑、笔记本电脑、超级移动个人计算机(ultra-mobile personal computer,UMPC)、上网本、个人数字助理(personal digital assistant,PDA)、车载设备、用户终端(user terminal,UT)、终端设备(user device,UD)、用户设备(user equipment,UE)、人工智能(artificial intelligence,AI)设备等具有图像显示功能的终端设备,本申请实施例对无线投屏装置100的具体类型不作任何限制。
可选的,上述显示装置200显示装置例如包括笔记本电脑、大屏显示装置(如智慧屏等)、投影设备、AI设备、平板电脑等能够实现大屏显示功能的终端设备,本申请实施例对显示装置200的具体类型不作任何限制。
在一些无线投屏场景中,如图1B所示,无线投屏装置100进行游戏、电影等具有较高显示帧率的投屏。如当前显示帧率在60Hz以上。例如,在如图1B所示场景中,无线投屏装置100为手机,显示装置200为电视。在无线投屏过程中,无线投屏装置100将正在显示的内容作为第一数据,通过Wi-Fi网络传输至显示装置200进行显示。并且,第一数据还包括无线投屏装置100在检测到用户点击屏幕,按键,游戏手柄/遥控器101后,向显示装置发送的控制命令。如操作图1B中所示人物跳跃的命令等。可选的,在无线投屏过程中,显示装置200还会向无线投屏装置100发送第二数据。例如,第二数据可以包括显示装置200通过摄像 头201采集到的图像数据等。或者,第二数据还可以包括显示装置200通过触摸屏检测到的如暂停等命令。
在又一些无线投屏场景中,如图1C所示,无线投屏装置100进行会议、办公等具有较低显示帧率的投屏。如当前显示帧率在20Hz以下。例如,在如图1C所示场景中,无线投屏装置100为笔记本电脑,显示装置200为投影设备。同样的,在无线投屏过程中,无线投屏装置100向显示装置200发送第一数据。例如,无线投屏装置100将显示的文本内容利用显示装置200在大屏幕上进行显示。可选的,在当前场景中,显示装置200用于接收并显示第一数据,但不会向无线投屏装置100发送第二数据。
可选的,本申请实施例中的无线投屏装置100、显示装置200可以通过不同的设备实现。例如,本申请实施例中的无线投屏装置100、显示装置200可通过图2中的通信装置来实现。如图2所示,该通信装置200包括至少一个处理器201,通信线路202,存储器203以及至少一个通信接口204。其中,存储器203还可以包括于处理器201中。
处理器201可以是中央处理单元(central processing unit,CPU),还可以是其他通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现成可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
通信线路202可以是将上述组件相互连接并在上述组件之间传送信息的电路。
通信接口204,用于与其他设备通信。在本申请实施例中,通信接口204可以是模块、电路、总线、接口、收发器或者其它能实现通信功能的装置,用于与其他设备通信。可选的,当通信接口204是收发器时,该收发器可以为独立设置的发送器,该发送器可用于向其他设备发送信息,该收发器也可以为独立设置的接收器,用于从其他设备接收信息。该收发器也可以是将发送、接收信息功能集成在一起的部件,本申请实施例对收发器的具体实现不做限制。
存储器203可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DR RAM)或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取 的任何其他介质,但不限于此。存储器203可以是独立存在,通过通信线路202与处理器201相连接。存储器203也可以和处理器201集成在一起。
其中,存储器203用于存储用于实现本申请方案的计算机执行指令,并由处理器201来控制执行。处理器201用于执行存储器203中存储的计算机执行指令,从而实现本申请下述实施例提供的确定参数确定的方法。
应注意,本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
可选的,本申请实施例中的计算机执行指令也可以称之为应用程序代码、指令、计算机程序或者其它名称,本申请实施例对此不作具体限定。
在具体实现中,作为一种实施例,处理器201可以包括一个或多个CPU,例如图2中的CPU0和CPU1。
在具体实现中,作为一种实施例,通信装置200可以包括多个处理器,例如图2中的处理器201和处理器207。这些处理器中的每一个可以是一个单核(single-CPU)处理器,也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中,作为一种实施例,通信装置200还可以包括输出设备205和输入设备206。输出设备205和处理器201通信,可以以多种方式来显示信息。例如,输出设备205可以是液晶显示器(liquid crystal display,LCD),发光二级管(light emitting diode,LED)显示设备,阴极射线管(cathode ray tube,CRT)显示设备,或投影仪(projector)等。输入设备206和处理器201通信,可以以多种方式接收用户的输入。例如,输入设备206可以是鼠标、键盘、触摸屏设备或传感设备等。
需要说明的是,上述的通信装置200可以是一个通用设备或者是一个专用设备,本申请实施例不限定该通信装置的类型。图2中示出的通信装置200的结构并不构成对通信装置的限定,实际的通信装置可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置。图示的部件可以以硬件,软件或软件和硬件的组合实现。
如下,介绍应用于上述图1B和图1C中的两种无线投屏场景中,无线投屏装置和显示装置之间的无线投屏方法。
在如图1B所示的高显示帧率的场景中,通过关闭低功耗功能以实现最佳的投屏体验。如图3所示,在时间单元1和时间单元2上无线投屏装置向显示装置发送第一数据,在时间单元3上显示装置向无线投屏装置发送第二数据,通过数据的交互实现无线投屏。在无第一数据或第二数据的时候,无线投屏装置和显示装置处于监听状态,如无线投屏装置和显示装置在时间单元7和时间单元8上保持监听状态,用于监听下一时间单元是否存在第一数据或第二数据,避免数据丢失。虽然,当前无线投屏方法能够为用户提供较好的无线投屏体验。但是,在无数据传输的时间单元,电子设备也需要保持监听状态,无法休眠,导致Wi-Fi芯片功耗较大,影响Wi-Fi芯片使用寿命。
在如图1C所示的低显示帧率的场景中,通过设置休眠时段,以降低电子设备Wi-Fi芯片的功耗。如图4所示,显示装置在时间单元6接收完无线投屏装置发送的第一数据后,确认不需要再传输第一数据或第二数据,在时间单元7进入监听状态。预设保持监听状态的时间阈值,假设时间阈值为1个时间单元。显示装置在确认监听时间满 足时间阈值要求后,进入休眠状态,并通知无线投屏装置其不再接收第一数据,进而实现降低功耗。其中,该通知可以实现为省电(power save)通知。后续,在显示装置被唤醒后,会向无线投屏装置发送通知。之后,无线投屏装置才能够继续发送第一数据。如图4所示,由于无线投屏装置只能响应于显示装置的通知才能继续发送第一数据,导致第一数据的传输出现时延,如时延为时间单元11和时间单元12。进而导致无线投屏装置的投屏更新响应较慢,影响用户使用体验。
基于此,本申请实施例提出一种无线投屏方法,能够保证无线投屏装置和显示装置在无线投屏过程中,无传输数据时休眠,降低功耗。并且,不会出现由于休眠导致的时延问题,提高用户的使用体验。
图5A为本申请实施例提供的无线投屏方法的流程示意图一。如图5A所示,该方法包括S501-S503:
S501、无线投屏装置根据显示图像时的显示帧率,确定第一传输周期的时长。
其中,显示帧率用于表示无线投屏装置显示第一图像的速率。第一时段为第一传输周期中用于向显示装置发送第一数据的时段。第一传输周期也可以描述为视频服务周期(video service period,VSP)。第一数据包括第一图像,第一图像例如包括视频图像,动画图像,文本文件图像等。第一数据还可以包括无线投屏装置向显示装置发送的控制命令等。
可选的,在开始无线投屏之前,无线投屏装置需要确定无线投屏的第一传输周期。其中,第一传输周期的时长能够满足无线投屏装置按照显示帧率传输数据,即当前第一传输周期需要满足按照显示帧率利用显示装置显示第一图像。具体的,第一传输周期为显示帧率的倒数。例如,无线投屏装置确定当前显示第一图像的显示帧率为40Hz。之后,无线投屏装置根据当前显示帧率确定第一传输周期时长为25ms。
可选的,无线投屏装置根据显示图像时的显示帧率,屏幕分辨率等内容,确定用于传输第一数据的时域资源,即确定第一时段。后续,无线投屏装置利用第一时段向显示装置传输的图像数据,能够使得显示装置按照显示帧率显示第一图像,实现投屏显示。
在一些实施例中,为了实现无线投屏,应优先保证无线投屏装置将图像数据发送至显示装置,因此,在第一传输周期中应优先配置第一时段。即在第一传输周期资源配置的过程中,将在先的时域资源配置为用于传输第一数据的资源。
示例性的,假设显示帧率为100Hz,无线投屏装置根据显示帧率,确定第一传输周期为10ms。如图6所示,第一传输周期包含10个时间单元,则每一时间单元时长为1ms。无线投屏装置确定传输第一数据需要占用6ms,即需要占用6个时间单元。因此,将时间单元1-时间单元6配置为第一时段。
需要说明的是,第一时段的时长小于第一传输周期。第一数据也可以描述为下行链路(down link,DL)数据,第一时段也可以描述为DL时段(DL duration)。
S502、无线投屏装置与显示装置协商确定第一传输周期的时域资源配置。
可选的,无线投屏装置在确定第一传输周期的时长后,只能根据自身的设备情况确定用于传输第一数据的时域资源配置,但并不能确定显示装置需要的时域资源。因此,无线投屏装置需要与显示装置进行协商,以确定第一传输周期中其他的时域资源 的配置。后续,无线投屏装置和显示装置能够按照相同的时域资源配置进行数据传输,避免数据丢失,实现无线投屏。
可选的,如图5B所示,步骤S502具体可以实现为下述步骤S5021-步骤S5024。
S5021、无线投屏装置向显示装置发送第一信息,该第一信息用于指示第一传输周期的时长,以及第一时段的时长。
可选的,显示装置在开始投屏之前,还未确认显示帧率。因此,需要无线投屏装置将第一传输周期的时长告知显示装置。并且,无线投屏装置将第一传输周期中已配置的第一时段告知显示装置,进而后续显示装置按照第一传输周期,在已确定的第一时段上接收无线投屏装置发送的第一数据,实现投屏。进一步的,显示装置能够根据第一时段配置第一传输周期中剩余的时域资源。
可选的,第一信息指示第一传输周期的时长以及第一时段的时长的方式,可以包括隐式通知方式或显示通知方式。其中,隐式通知方式,例如包括在第一信息中携带第一传输周期的时长以及第一时段的时长的信息。显示通知方式例如包括预配置信息读取方式,直接利用第一信息指示时域资源配置。比如,第一信息为指示信息,显示装置在接收到第一信息后,能够按照预先与无线投屏装置约定的方式,确定第一信息中指示的第一传输周期的时长,以及第一时段的时长。
示例性的,假设第一传输周期的时长为10ms,第一时段的时长为6ms,则第一信息可以为111111XXXX。其中,每一比特位用于表示1ms,第一信息占用的比特位数量用于表示第一传输周期的时长,比特位取值为1表示用于传输第一数据。
S5022、显示装置根据第一信息,在第一传输周期除第一时段以外的时段中,确定用于发送第二数据的第二时段。
可选的,显示装置确定用于传输第二数据的第二时段。其中,第二数据例如包括显示装置检测到触摸或按键操作后需要向无线投屏装置反馈的数据,显示装置采集的图像数据等。之后,显示装置在第一传输周期中的剩余时段中配置第二时段。即显示装置根据自身设备情况及数据传输需求,设置第二时段的时长。进一步的,显示装置还能够将第一传输周期中,除第一时段和第二时段以外的时段配置为用于休眠的第三时段。也即第一时段,第二时段以及第三时段顺序配置。
示例性的,如图6所示,显示装置确定传输第二数据需要占用1ms,即1个时间单元的时域资源,将时间单元7配置为第二时段。进而确定第一传输周期中剩余的时间单元8-时间单元10配置为第三时段。
在一些实施例中,若显示装置不会产生第二数据,则显示装置不需要配置第二时段,或者将第二时段配置为零。显示装置获得第一信息后,根据第一传输周期以及第一时段,将第一传输周期中的剩余时段全部确定为第三时段。
需要说明的是,第二数据也可以描述为上行链路(up link,UL)数据,第二时段也可以描述为UL时段(UL duration)。并且,第一时段和第二时段的时长小于第一传输周期。
S5023、显示装置向无线投屏装置发送第二信息,该第二信息用于指示第二时段的时长。
可选的,显示装置利用第二信息,将已配置完成的第二时段告知无线投屏装置。 进而后续无线投屏装置按照第一传输周期,在已确定的第二时段上接收显示装置发送的第二数据,实现信息交互。
可选的,第二信息指示第二时段的时长的方式,可以包括隐式通知方式或显示通知方式。其中,隐式通知方式,例如包括在第二信息中携带第二时段的时长的信息。显示通知方式例如包括预配置信息读取方式,直接利用第二信息指示时域资源配置。比如,第二信息为指示信息,无线投屏装置在接收到第二信息后,能够按照预先与显示装置约定的方式,确定第二信息中指示的第二时段的时长。
示例性的,假设第一传输周期的时长为10ms,第一时段的时长为6ms,第二时段时长为1ms,则第二信息可以为1111110XXX。其中,比特位取值为0表示用于传输第二数据。
S5024、无线投屏装置根据第一时段和第二时段,将第一传输周期中除第一时段和第二时段以外的时段确定为第三时段,该第三时段为休眠时段。
可选的,无线投屏装置在确定第一时段和第二时段后,将第一传输周期中剩余的时域资源确定为第三时段。示例性的,如图6所示,显示装置能够确定与无线投屏装置相同的第一传输周期时域资源配置。从而后续无线投屏装置和显示装置能够利用相同的第一传输周期资源,实现无线投屏,不会造成由于时域资源信息不对称导致的数据丢失问题。
在一些实施例中,在上述步骤S5023中,第二信息中还可以用于指示显示装置已配置的第三时段的时长。进而无线投屏装置在接收到第二信息后,能够直接根据第二信息,确定第一传输周期的全部时域资源配置,无线投屏装置不必再重复配置第三时段,提高第一传输周期资源配置效率。
在另一些实施例中,第二信息用于指示第二时段和第三时段。无线投屏装置根据第二时段和第三时段的配置情况,确定第一传输周期资源配置是否存在异常。若无异常,则开始传输第一数据。如此,进一步确保无线投屏装置和显示装置的第一传输周期资源配置相同,从而保证能够正常投屏。
S503、无线投屏装置基于第一传输周期与显示装置进行无线投屏数据的传输。
可选的,无线投屏装置按照第一传输周期,执行如下一项或几项内容:在第一时段向显示装置发送第一数据,在第二时段接收显示装置发送的第二数据,在第三时段进行休眠。
示例性的,若显示装置未发送第二数据,则无线投屏装置按照第一传输周期在第一时段发送第一数据,以及在第三时段休眠,即可实现利用显示装置显示第一图像,实现Wi-Fi无线投屏。
如此,无线投屏装置和显示装置按照第一传输周期进行Wi-Fi无线投屏,能够在保证按照无线投屏装置显示帧率投屏的同时,实现在第三时段进行休眠。进而避免休眠导致的时延,提高用户使用体验。并且,在保证用户使用体验的同时,节约功耗,增加Wi-Fi芯片的寿命。
可选的,在第一传输周期配置完成后,若需要保证无线投屏装置和显示装置按照第一传输周期实时进行数据传输,则需要保证无线投屏装置和显示装置的时间同步。那么,在开始投屏之前,还需要对无线投屏装置和显示装置的时间进行同步校准。也 即,在步骤S503之前还应包括时间校准的步骤。图7为本申请实施例提供的又一种无线投屏方法流程示意图。如图7所示,无线投屏装置和显示装置在步骤S503之前,通过步骤S701-步骤S703实现时间校准。在本申请实施例中,以无线投屏装置时间为校准基准,显示装置按照无线投屏装置时间进行校准为例进行说明。
S701、无线投屏装置根据本地时间以及发送第三信息的时长,确定第一时间。
其中,第一时间为无线投屏装置根据本地时间以及发送第三信息的时长确定。第三信息用于指示显示装置,根据第一时间校准显示装置的时间。
示例性的,如图8所示,无线投屏装置中配置有Wi-Fi芯片,根据上述对TSF技术的介绍可知,在Wi-Fi网络中STA按照固定周期发送beacon帧进行时间同步。因此,Wi-Fi芯片中配置有TSF定时器,用于进行TSF校准。TSF定时器能够确定无线投屏装置的本地时间。之后,若需要发送本地时间,在发送数据的过程中,器件传输还会产生一部分耗时。因此,TSF定时器需要根据当前无线投屏装置的本地时间和未来发送本地时间可能产生的耗时,确定第一时间,进而保证显示装置获得准确的时间基准。
S702、无线投屏装置向显示装置发送第三信息,该第三信息用于指示显示装置根据第一时间校准显示装置的时间。
其中,第三信息可以实现为报文,无线投屏装置在报文中携带第一时间,进而实现向显示装置发送第一时间。
示例性的,如图8所示,本申请实施例提供一种报文结构,包括报文头和报文本身的数据。其中,报文头信息包括报文的物理报头(phy preamble)和媒体存储控制位(media access control address,MAC)头。MAC头(MAC header)中包括目的地址(destination address)和源地址(source address)。此外,报文结构中还包括用于判断当前帧是否发生错误的帧校验序列(frame check sequence,FCS)。其中,无线投屏装置在MAC头中携带第一时间,通过报文将第一时间发生至显示装置。
S703、显示装置根据第一时间以及接收第三信息的时长,确定第二时间,并利用第二时间,校准本地时间。
可选的,显示装置在接收到第三信息后,获得第一时间。如图8所示,显示装置在接收第三信息的过程中,在传输路径中同样会产生一定的耗时。因此,TSF定时器需要根据第一时间以及传输第三信息产生的耗时,确定用于时间校准的第二时间,根据第二时间校准本地时间。例如,显示装置接收的无线投屏装置发送的报文后,解析报文中携带的第一时间,利用第一时间校准本地时间。
示例性的,无线投屏装置中的TSF定时器确定本地时间为5:00,传输第三信息的时长为1min,则确定第一时间为5:01。无线投屏装置利用第三信息将第一时间发生至显示装置。显示装置接收到第三信息后,显示装置中的TSF定时器确定第一时间为5:01,传输第三信息的时长为2min,则确定第二时间为5:03。进而将本地时间修正为5:03。
如此,通过时间校准,保证无线投屏装置和显示装置的本地时间相同。无线投屏装置和显示装置能够基于相同的时间,按照已配置的第一传输周期,实现实时Wi-Fi无线投屏,避免出现投屏异常。
可选的,为了避免在投屏过程中,无线投屏装置和/或显示装置的本地时间变化,而导致的两者时间不对齐。配置第二传输周期,在无线投屏过程中,即在执行步骤S503 的过程中,无线投屏装置和显示装置按照第二传输周期进行时间校准。如图7所示,时间校准流程还包括步骤S704。
S704、无线投屏装置按照第二传输周期,循环上述步骤S701-步骤S703,校准显示装置的时间。
可选的,若要实现Wi-Fi无线投屏,则需要保证无线投屏装置和显示装置连接到同一个Wi-Fi网络中。根据上述对TSF技术的介绍可知,无线投屏装置和显示装置之间能够利用周期性发送beacon帧,实现时间同步。因此,将第二传输周期配置为发送beacon的周期。即第二传输周期为beacon周期,利用Wi-Fi网络中的时间校准周期,实现无线投屏装置和显示装置的时间校准。那么,第三信息实现为beacon帧。
如此,按照预设传输周期对无线投屏装置和显示装置进行时间校准,能够确保无线投屏装置和显示装置按照第一传输周期进行Wi-Fi无线投屏的过程中不出现由于时间未对齐导致的异常。进一步的,能够使得无线投屏装置和显示装置的同步精度达到μs级别,提高Wi-Fi无线投屏过程中的传输效率。
可选的,无线投屏装置和显示装置按照第二传输周期进行时间校准,为了保证在两个时间校准点之间,无线投屏装置和显示装置不会出现由于时间未对齐导致的传输异常。在休眠时段前后,显示装置向无线投屏装置发送请求,用于请求休眠或唤醒,进而保证无线投屏装置和显示装置能够同时休眠或唤醒,从而避免传输的数据丢失。
在一些实施例中,无线投屏装置接收显示装置发送的第一请求,第一请求用于请求休眠。第一请求为显示装置在如下任一时刻发送的请求:第二时段末尾,发送最后一个第二数据后,第一时段末尾,接收最后一个第一数据后。响应于第一请求,无线投屏装置开始休眠,并指示显示装置休眠。可选的,无线投屏装置在发送的最后一个第一数据中携带标记,显示装置在接收到该第一数据后,根据标记能够确认当前数据为最后一个第一数据。
示例性的,如图6所示,在时间单元7结束后,显示装置向无线投屏装置发送第一请求。无线投屏装置接收到第一请求后,确认当前是否为第二时段末尾,将进入第三时段。若确认时间无异常,则响应于第一请求,无线投屏装置和显示装置进入休眠状态,以减少功耗。
在一些实施例中,无线投屏装置接收显示装置发送的第二请求,第二请求用于请求唤醒。第二请求为显示装置在第一传输周期结束后发送的请求。响应于第二请求,无线投屏装置唤醒显示装置,并向显示装置发送第一数据。
示例性的,如图6所示,在时间单元10结束后,显示装置向无线投屏装置发送第二请求。无线投屏装置接收到第二请求后,确认当前是否为第三时段末尾,将结束休眠。若确认时间无异常,则响应于第二请求,无线投屏装置和显示装置进入唤醒状态,以保证下一个周期数据的正常传输。
可选的,无线投屏装置和显示装置在进行Wi-Fi无线投屏的过程中,可能会出现由于显示帧率变化等原因导致的第一传输周期的时域资源的变化。因此,配置预设周期,无线投屏装置和显示装置按照预设周期确认第一传输周期的资源配置是否发生变化,是否需要重配置第一传输周期。和/或,无线投屏装置在确定显示帧率发生变化后,通知显示装置重配置第一传输周期的时域资源。其中,重配置第一传输周期的时域资 源的方法与配置第一传输周期的时域资源的方法相同,详见上述步骤,在此不再进行赘述。
示例性的,如图9中(a)所示,无线投屏装置在按照预设周期确定第一传输周期的时域资源的过程中,在VSP_n+2确定第一时段发生变化,由6个时间单元减少为5个时间单元。无线投屏装置通知显示装置重配置第一传输周期。如图9中(a)所示,第一传输周期重配置后,从VSP_n+2开始,第一时段为时间单元1-时间单元5,第二时段为时间单元6,第三时段为时间单元7-时间单元10。
又示例性的,如图9中(b)所示,无线投屏装置在VSP_n+1结束后,确认显示帧率变大,进而根据变化后的显示帧率,重新确定第一传输周期为9个时间单元,第一时段为4个时间单元。并且,无线投屏装置需要通知显示装置重配置第一传输周期。如图9中(b)所示,第一传输周期重配置后,从VSP_n+2开始,第一时段为时间单元1-时间单元4,第二时段为时间单元5,第三时段为时间单元6-时间单元9。
如此,在Wi-Fi无线投屏过程中,按照预设周期更新第一传输周期的时域资源配置,避免由于显示帧率等条件的变化导致的传输异常。
上述主要从网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是,各个网元,例如无线投屏装置和显示装置。为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对电子设备进行功能模块的划分,例如,可以对应各个功能划分各个功能模块,也可以将两个或两个以上的功能集成在一个处理模块中。上述功能模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。下面以采用对应功能划分各个功能模块为例进行说明。
在采用集成的模块的情况下,图10中(a)示出了上述实施例中所涉及的无线投屏装置的一种可能的结构示意图。该无线投屏装置1000可以为无线投屏装置,或者内置于无线投屏装置的芯片,该无线投屏装置1000包括:处理模块1001,发送模块1002和接收模块1003。
其中,处理模块1001用于支持无线投屏装置1000执行上述实施例中的步骤S501和步骤S5024中的一个或者多个步骤;和/或,处理模块1001还用于支持无线投屏装置1000执行本申请实施例中无线投屏装置执行的其他步骤。
发送模块1002用于支持无线投屏装置1000执行上述实施例中的步骤S502、步骤S503和步骤S5021中的一个或者多个步骤。和/或,发送模块1002还用于支持无线投屏装置1000执行本申请实施例中无线投屏装置执行的其他步骤。
接收模块1003用于支持无线投屏装置1000执行上述实施例中的步骤S502、步骤 S503和步骤S5023中的一个或者多个步骤。和/或,接收模块1003还用于支持无线投屏装置1000执行本申请实施例中无线投屏装置执行的其他步骤。
上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。
在采用硬件实现的基础上,图10中(a)所示的无线投屏装置1000中涉及的处理模块1001可以由处理器或处理器相关电路组件实现,可以为处理器或处理单元。发送模块1002可以为发送器,接收模块1003可以为接收器,发送模块1002以及接收模块1003可以合并为收发单元,收发单元可以由收发器或收发器相关电路组件实现,可以为收发器或收发单元,收发器也可以称为通信接口或收发机。
可选的,实际应用中,如图10中(b)所示,通常将处理模块1001集成在片上系统芯片(system on chip,SOC)1004中。发送模块1002以及接收模块1003集成在一个Wi-Fi芯片1005中。
在一些实施例中,Wi-Fi芯片1005中还会集成处理模块1001的部分功能。Wi-Fi芯片1005用于支持无线投屏装置1000执行上述实施例中的步骤S701,步骤S702,步骤S703以及步骤S704。
可选的,图10中(a)所示的无线投屏装置1000还可以包括存储模块(图10中(a)中未示出),该存储模块存储有程序或指令。当处理模块执行该程序或指令时,使得图10中(a)所示的无线投屏装置1000可以执行图5A、图5B和图7所示的无线投屏方法。
图10中(a)或(b)所示的无线投屏装置1000的技术效果可以参考图5A、图5B和图7所示的无线投屏方法的技术效果,此处不再赘述。
在采用集成的模块的情况下,图11中(a)示出了上述实施例中所涉及的显示装置的一种可能的结构示意图。该显示装置1100可以为显示装置,或者内置于显示装置的芯片,该显示装置1100包括:处理模块1101,接收模块1102和发送模块1103。
其中,处理模块1101用于支持显示装置1100执行上述实施例中的步骤S5022;和/或,处理模块1101还用于支持显示装置1100执行本申请实施例中显示装置执行的其他步骤。
接收模块1102用于支持显示装置1100执行上述实施例中的步骤S502、步骤S503和步骤S5021中的一个或者多个步骤。和/或,接收模块1102还用于支持显示装置1100执行本申请实施例中显示装置执行的其他步骤。
发送模块1103用于支持显示装置1100执行上述实施例中的步骤S502、步骤S503和步骤S5023中的一个或者多个步骤。和/或,发送模块1103还用于支持显示装置1100执行本申请实施例中显示装置执行的其他步骤。
可选的,显示装置1100还包括显示模块,用于基于无线投屏数据,显示图像。
上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。
在采用硬件实现的基础上,图11中(a)所示的显示装置1100中涉及的处理模块1101可以由处理器或处理器相关电路组件实现,可以为处理器或处理单元。接收模块1102可以为发送器,发送模块1103可以为接收器,接收模块1102以及发送 模块1103可以合并为收发单元,收发单元可以由收发器或收发器相关电路组件实现,可以为收发器或收发单元,收发器也可以称为通信接口或收发机。
可选的,实际应用中,如图11中(b)所示,通常将处理模块1101集成在SOC芯片1104中。接收模块1102以及发送模块1103集成在一个Wi-Fi芯片1105中。
在一些实施例中,Wi-Fi芯片1105中还会集成处理模块1101的部分功能。Wi-Fi芯片1105用于支持显示装置1100执行上述实施例中的步骤S701,步骤S702,步骤S703以及步骤S704。
可选的,图11中(a)所示的显示装置1100还可以包括存储模块(图11中(a)中未示出),该存储模块存储有程序或指令。当处理模块执行该程序或指令时,使得图11中(a)所示的显示装置1100可以执行图5A、图5B和图7所示的无线投屏方法。
图11中(a)或(b)所示的显示装置1100的技术效果可以参考图5A、图5B和图7所示的无线投屏方法的技术效果,此处不再赘述。
本申请实施例提供一种信息传输系统,包括无线投屏装置和显示装置。其中,无线投屏装置为发送端设备,以显示装置为接收端设备。
其中,无线投屏装置用于执行图5A中的步骤S501,步骤S502和步骤S503,和/或用于执行图5B中的步骤S5021、步骤S5023和步骤S5024中的一个或者多个步骤,和/或用于执行图7中的步骤S701,步骤S702和步骤S704中的一个或者多个步骤,和/或用于执行本文所描述的技术的其它过程。
显示装置用于执行图5A中的步骤S502和步骤S503,和/或用于执行图5B中的步骤S5021、步骤S5022和步骤S5023中的一个或者多个步骤,和/或用于执行图7中的步骤S702,步骤S703和步骤S704中的一个或者多个步骤,和/或用于执行本文所描述的技术的其它过程。
其中,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应的电子设备的功能描述,在此不再赘述。
本申请实施例还提供一种芯片系统,包括:处理器,所述处理器与存储器耦合,所述存储器用于存储程序或指令,当所述程序或指令被所述处理器执行时,使得该芯片系统实现上述任一方法实施例中的方法。
可选地,该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时,该处理器可以是逻辑电路、集成电路等。当通过软件实现时,该处理器可以是一个通用处理器,通过读取存储器中存储的软件代码来实现。
可选地,该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起,也可以和处理器分离设置,本申请并不限定。示例性的,存储器可以是非瞬时性处理器,例如只读存储器ROM,其可以与处理器集成在同一块芯片上,也可以分别设置在不同的芯片上,本申请对存储器的类型,以及存储器与处理器的设置方式不作具体限定。
示例性的,该芯片系统可以是现场可编程门阵列(field programmable gate array,FPGA),可以是专用集成芯片(application specific integrated circuit,ASIC), 还可以是SoC芯片,Wi-Fi芯片,还可以是中央处理器(central processor unit,CPU),还可以是网络处理器(network processor,NP),还可以是数字信号处理电路(digital signal processor,DSP),还可以是微控制器(micro controller unit,MCU),还可以是可编程控制器(programmable logic device,PLD)或其他集成芯片。
应理解,上述方法实施例中的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。
本申请的实施例还提供了一种存储介质,用于存储为上述无线投屏装置所用的指令。
本申请实施例还提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机可读指令,当计算机读取并执行所述计算机可读指令时,使得计算机执行上述任一方法实施例中的方法。
本申请的实施例还提供了一种计算机程序产品,例如计算机可读存储介质,包括用于执行上述实施例中无线投屏装置执行的步骤所设计的程序。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现,也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成,软件模块可以被存放于随机存取存储器(random access memory,RAM)、闪存、只读存储器(read only memory,ROM)、可擦除可编程只读存储器(erasable programmable ROM,EPROM)、电可擦可编程只读存储器(electrically EPROM,EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器,从而使处理器能够从该存储介质读取信息,且可向该存储介质写入信息。当然,存储介质也可以是处理器的组成部分。处理器和存储介质可以位于专用集成电路(application specific integrated circuit,ASIC)中。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述模块或单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质 上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取存储器(random access memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。

Claims (33)

  1. 一种无线投屏装置,其特征在于,包括:
    处理器,用于:
    根据所述无线投屏装置显示图像时的显示帧率,确定第一传输周期的时长;
    并通过与显示装置协商,确定所述第一传输周期的时域资源配置;其中,所述第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,所述第一时段用于向所述显示装置发送第一数据,所述第二时段用于接收所述显示装置发送的第二数据,所述第三时段用于休眠;
    收发机,用于基于所述第一传输周期与所述显示装置进行无线投屏数据的传输。
  2. 根据权利要求1所述的装置,其特征在于,
    所述收发机,具体用于:
    向所述显示装置发送第一信息,所述第一信息用于指示第一传输周期的时长,以及所述第一时段的时长;
    接收所述显示装置响应于所述第一信息而发送的第二信息,所述第二信息用于指示所述第二时段的时长;
    所述处理器,具体用于根据所述第一时段的时长以及所述第二时段的时长,将所述第一传输周期中的剩余时段设置为所述第三时段。
  3. 根据权利要求1或2所述的装置,其特征在于,在所述第一传输周期中,所述第一时段,所述第二时段以及所述第三时段顺序配置。
  4. 根据权利要求1-3任一项所述的装置,其特征在于,
    所述收发机,还用于向所述显示装置发送第三信息,所述第三信息用于指示所述显示装置根据第一时间校准所述显示装置的时间;所述第一时间为所述收发机根据本地时间以及发送所述第三信息的时长确定。
  5. 根据权利要求4所述的装置,其特征在于,
    所述收发机,还用于按照第二传输周期向所述显示装置发送所述第三信息,所述第二传输周期为信标beacon周期。
  6. 根据权利要求1-5任一项所述的装置,其特征在于,
    所述收发机,还用于接收所述显示装置发送的第一请求,所述第一请求用于请求休眠,所述第一请求为所述显示装置在如下任一时刻发送的请求:所述第二时段末尾,发送最后一个第二数据后,所述第一时段末尾,接收最后一个第一数据后;
    所述处理器,还用于响应于所述第一请求,指示所述显示装置休眠后,控制所述收发机休眠。
  7. 根据权利要求1-6任一项所述的装置,其特征在于,
    所述收发机,还用于接收所述显示装置发送的第二请求,所述第二请求用于请求唤醒;所述第二请求为所述显示装置在所述第一传输周期结束后发送的请求;
    所述处理器,还用于响应于所述第二请求,唤醒所述显示装置,并控制所述收发机向所述显示装置发送所述第一数据。
  8. 根据权利要求1-7任一项所述的装置,其特征在于,所述第一传输周期的时长满足所述收发机按照所述显示帧率进行无线投屏数据的传输。
  9. 根据权利要求8所述的装置,其特征在于,所述第一传输周期为所述显示帧率的倒数。
  10. 一种显示装置,其特征在于,包括:
    处理器,用于与无线投屏装置协商确定第一传输周期的时域资源配置;其中,所述第一传输周期的时长为所述无线投屏装置根据显示图像时的显示帧率确定;所述第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,所述第一时段用于接收所述无线投屏装置发送的第一数据,所述第二时段为所述处理器确定用于向所述无线投屏装置发送第二数据的时段,所述第三时段用于休眠;
    收发机,用于基于所述第一传输周期与所述无线投屏装置进行无线投屏数据的传输;
    显示屏,用于基于所述无线投屏数据,显示图像。
  11. 根据权利要求10所述的装置,其特征在于,
    所述收发机,具体用于:
    接收所述无线投屏装置发送的第一信息,所述第一信息用于指示第一传输周期的时长,以及所述第一时段的时长;
    向所述无线投屏装置发送第二信息,所述第二信息用于指示所述第二时段的时长;
    所述处理器,具体用于根据所述第一时段的时长以及所述第二时段的时长,将所述第一传输周期中的剩余时段设置为所述第三时段。
  12. 根据权利要求10或11所述的装置,其特征在于,在所述第一传输周期中,所述第一时段,所述第二时段以及所述第三时段顺序配置。
  13. 根据权利要求10-12任一项所述的装置,其特征在于,
    所述收发机,还用于接收所述无线投屏装置发送的第三信息,获得第一时间;以及根据所述第一时间和接收所述第三信息的时长,确定第二时间;利用所述第二时间,校准本地时间。
  14. 根据权利要求13所述的装置,其特征在于,
    所述收发机,还用于按照第二传输周期接收所述无线投屏装置发送的所述第三信息,所述第二传输周期为信标beacon周期。
  15. 根据权利要求10-14任一项所述的装置,其特征在于,
    所述收发机,还用于向所述无线投屏装置发送第一请求,所述第一请求用于请求休眠,所述第一请求在如下任一时刻发送:所述第二时段末尾,发送最后一个第二数据后,所述第一时段末尾,接收最后一个第一数据后;
    所述处理器,还用于在确定所述无线投屏装置接收到所述第一请求后,控制所述收发机休眠。
  16. 根据权利要求10-15任一项所述的装置,其特征在于,
    所述收发机,还用于在所述第一传输周期结束后,向所述无线投屏装置发送第二请求,所述第二请求用于请求唤醒;
    所述处理器,还用于在确定所述无线投屏装置接收到所述第二请求后唤醒所述收发机,并控制所述收发机接收所述第一数据。
  17. 根据权利要求10-16任一项所述的装置,其特征在于,所述第一传输周期的 时长满足所述显示屏按照所述显示帧率显示图像。
  18. 根据权利要求17所述的装置,其特征在于,所述第一传输周期为所述显示帧率的倒数。
  19. 一种无线投屏方法,其特征在于,包括:
    无线投屏装置根据所述无线投屏装置显示图像时的显示帧率,确定第一传输周期的时长;
    所述无线投屏装置与显示装置协商确定所述第一传输周期的时域资源配置;其中,所述第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,所述第一时段用于向所述显示装置发送第一数据,所述第二时段用于接收所述显示装置发送的第二数据,所述第三时段用于休眠;
    所述无线投屏装置基于所述第一传输周期与所述显示装置进行无线投屏数据的传输。
  20. 根据权利要求19所述的方法,其特征在于,所述无线投屏装置与所述显示装置协商确定所述第一传输周期的时域资源配置,包括:
    所述无线投屏装置向所述显示装置发送第一信息,所述第一信息用于指示第一传输周期的时长,以及所述第一时段的时长;
    所述无线投屏装置接收所述显示装置响应于所述第一信息而发送的第二信息,所述第二信息用于指示所述第二时段的时长;
    所述无线投屏装置根据所述第一时段的时长以及所述第二时段的时长,将所述第一传输周期中的剩余时段设置为所述第三时段。
  21. 根据权利要求19或20所述的方法,其特征在于,在所述第一传输周期中,所述第一时段,所述第二时段以及所述第三时段顺序配置。
  22. 根据权利要求19-21任一项所述的方法,其特征在于,在所述无线投屏装置基于所述第一传输周期与所述显示装置传输数据之前,所述方法还包括:
    所述无线投屏装置向所述显示装置发送第三信息,所述第三信息用于指示所述显示装置,根据所述第一时间校准所述显示装置的时间;所述第一时间为所述无线投屏装置根据本地时间以及发送所述第三信息的时长确定。
  23. 根据权利要求22所述的方法,其特征在于,所述方法还包括:
    所述无线投屏装置按照第二传输周期向所述显示装置发送所述第三信息,所述第二传输周期为信标beacon周期。
  24. 根据权利要求19-23任一项所述的方法,其特征在于,所述第一传输周期的时长满足所述无线投屏装置按照所述显示帧率进行无线投屏数据的传输。
  25. 根据权利要求24所述的方法,其特征在于,所述第一传输周期为所述显示帧率的倒数。
  26. 一种无线投屏方法,其特征在于,包括:
    显示装置与无线投屏装置协商确定第一传输周期的时域资源配置;其中,所述第一传输周期的时长为所述无线投屏装置根据显示图像时的显示帧率确定;所述第一传输周期的时域资源被配置为包括第一时段,第二时段和第三时段,所述第一时段用于接收所述无线投屏装置发送的第一数据,所述第二时段为所述显示装置确定用于向所 述无线投屏装置发送第二数据的时段,所述第三时段用于休眠;
    所述显示装置基于所述第一传输周期与所述无线投屏装置进行无线投屏数据的传输,并显示图像。
  27. 根据权利要求26所述的方法,其特征在于,所述显示装置与无线投屏装置协商确定第一传输周期的时域资源配置,包括:
    所述显示装置接收所述无线投屏装置发送的第一信息,所述第一信息用于指示第一传输周期的时长,以及所述第一时段的时长;
    响应于所述第一信息,所述显示装置向所述无线投屏装置发送第二信息,所述第二信息用于指示所述第二时段的时长;
    所述显示装置根据所述第一时段的时长以及所述第二时段的时长,将所述第一传输周期中的剩余时段设置为所述第三时段。
  28. 根据权利要求26或27所述的方法,其特征在于,在所述第一传输周期中,所述第一时段,所述第二时段以及所述第三时段顺序配置。
  29. 根据权利要求26-28任一项所述的方法,其特征在于,在所述显示装置基于所述第一传输周期与所述无线投屏装置传输数据之前,所述方法还包括:
    所述显示装置接收所述无线投屏装置发送的第三信息,获得第一时间;
    所述显示装置根据所述第一时间以及接收所述第三信息的时长,确定第二时间;
    所述显示装置利用所述第二时间,校准本地时间。
  30. 根据权利要求29所述的方法,其特征在于,所述方法还包括:
    所述显示装置按照第二传输周期接收所述无线投屏装置发送的所述第三信息,所述第二传输周期为信标beacon周期。
  31. 根据权利要求26-30任一项所述的方法,其特征在于,所述第一传输周期的时长满足所述显示装置按照所述显示帧率显示图像。
  32. 根据权利要求31所述的方法,其特征在于,所述第一传输周期为所述显示帧率的倒数。
  33. 一种计算机可读存储介质,其特征在于,包括程序或指令,当所述程序或指令被执行时,如权利要求19至25中任一项所述的方法被实现,或者,如权利要求26至32中任一项所述的方法被实现。
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