CN111787588A - Wireless screen projection method and device, related equipment and storage medium - Google Patents
Wireless screen projection method and device, related equipment and storage medium Download PDFInfo
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- CN111787588A CN111787588A CN202010661024.7A CN202010661024A CN111787588A CN 111787588 A CN111787588 A CN 111787588A CN 202010661024 A CN202010661024 A CN 202010661024A CN 111787588 A CN111787588 A CN 111787588A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing 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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The application discloses a wireless screen projection method, a wireless screen projection device, a chip, electronic equipment and a storage medium. The method comprises the following steps: under the condition that a LiFi link established between first electronic equipment and second electronic equipment is not disconnected, the first electronic equipment transmits multimedia data to the second electronic equipment by using the LiFi link so that the second electronic equipment can present the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device; and under the condition that the LiFi link is disconnected, the first electronic device sends multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data.
Description
Technical Field
The present application relates to the field of wireless screen projection technologies, and in particular, to a wireless screen projection method and apparatus, a related device, and a storage medium.
Background
With the rapid increase of internet users and network data volume, data transmission modes are more and more important for users; moreover, as Wireless Fidelity (WiFi) technology becomes more and more popular, Wireless data transmission between electronic devices is generally performed by using the WiFi technology; that is, wireless screen projection may be achieved using WiFi technology.
In some scenarios, wireless screen projection may also be implemented using visible Light wireless communication (LiFi) technology. The LiFi technology is a technology for wireless transmission of data using the visible spectrum (e.g., light emitted from a bulb); in particular, the LiFi technology may transmit data by controlling a light emitting device, such as a Light Emitting Diode (LED), to emit a high-speed blinking signal unrecognizable by the naked eye through an electrical signal. Because the width of the visible light spectrum can reach 1 ten thousand times of the width of the radio frequency spectrum, the bandwidth corresponding to the LiFi technology is higher than that corresponding to the WiFi technology, and generally can reach the bandwidth of megabits (Gbps).
However, in the related art, the wireless screen projection method needs to be optimized.
Disclosure of Invention
In order to solve the related technical problems, embodiments of the present application provide a wireless screen projection method, apparatus, related device, and storage medium.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a wireless screen projection method, which comprises the following steps:
under the condition that a LiFi link established between first electronic equipment and second electronic equipment is not disconnected, the first electronic equipment transmits multimedia data to the second electronic equipment by using the LiFi link so that the second electronic equipment can present the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device;
and under the condition that the LiFi link is disconnected, the first electronic device sends multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data.
In the above scheme, the method further comprises:
the first electronic equipment monitors that the LiFi link is disconnected;
switching a LiFi module of the first electronic device to a WiFi antenna of the first electronic device to switch multimedia data to the WiFi link for transmission; wherein,
the LiFi module can realize the interconversion between radio frequency signal and the light signal at least.
In the above scheme, the method further comprises:
after multimedia data are switched to the WiFi link for transmission, the first electronic equipment monitors the LiFi link;
and after monitoring that the LiFi link is recovered, the first electronic device switches the WiFi antenna to the LiFi module so as to switch multimedia data to the LiFi link for transmission.
In the above scheme, the method further comprises:
and the first electronic equipment monitors whether the LiFi link is disconnected or not in a heartbeat packet sending mode.
In the above scheme, the method further comprises:
the first electronic device utilizes a first switch to switch between the LiFi module and the WiFi antenna.
In the above scheme, the method further comprises:
the first electronic equipment detects equipment capable of carrying out LiFi screen projection; determining the detected equipment capable of performing LiFi screen projection as the second electronic equipment;
the first electronic device and the second electronic device establish a LiFi link; and establishing a WiFi link with the second electronic device.
In the above scheme, the method further comprises:
the first electronic device does not detect a device capable of LiFi screen projection;
the first electronic device determining the second electronic device based on the first information; establishing a WiFi link with the second electronic equipment; the first information is generated based on a first operation performed on the first electronic device; the first operation is an operation related to a screen-casting event.
The embodiment of the application further provides a wireless screen projection device, which is arranged on the first electronic device, and comprises:
the first processing unit is used for sending multimedia data to a second electronic device by utilizing a LiFi link under the condition that the LiFi link established with the second electronic device is not disconnected, so that the second electronic device can present the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device;
and the second processing unit is used for sending multimedia data to the second electronic equipment by utilizing the WiFi link established with the second electronic equipment under the condition that the LiFi link is disconnected so as to enable the second electronic equipment to present the multimedia data.
An embodiment of the present application further provides a chip, including: a processor and an interface; wherein,
the processor is adapted to perform the steps of any of the above methods when running the computer program.
An embodiment of the present application further provides an electronic device, including: a processor and a memory for storing a computer program capable of running on the processor; wherein,
the processor is adapted to perform the steps of any of the above methods when running the computer program.
An embodiment of the present application further provides a storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the above methods are implemented.
According to the wireless screen projection method, the wireless screen projection device, the related equipment and the storage medium, under the condition that a LiFi link established between first electronic equipment and second electronic equipment is not disconnected, the first electronic equipment sends multimedia data to the second electronic equipment by using the LiFi link, so that the second electronic equipment can present the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device; and under the condition that the LiFi link is disconnected, the first electronic device sends multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data. According to the scheme of the embodiment of the application, a LiFi technology and a WiFi technology are combined, wireless screen projection from a first electronic device to a second electronic device is achieved, data are transmitted through the LiFi link to project a screen when a LiFi link between the two electronic devices is not disconnected, and a WiFi link between the two electronic devices is used for projecting a screen when a shielding object appears between the two electronic devices and the LiFi link is disconnected; so, multimedia data's transmission speed when can improve and throw the screen to improve and throw the stability of screen, and then reduce and throw the card pause phenomenon of screen in-process, promote user's the experience of throwing the screen.
Drawings
Fig. 1 is a schematic flowchart of a wireless screen projection method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a wireless screen projection device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a wireless screen projection device according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a chip according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solution of the present application is further described in detail below with reference to the drawings and examples of the specification.
In the related art, as internet users and the amount of network data increases rapidly, a data transmission mode becomes more and more important for the users; moreover, as WiFi technology becomes more and more popular, the electronic devices generally use the WiFi technology to perform wireless data transmission; that is, wireless screen projection may be achieved using WiFi technology.
However, WiFi technology utilizes radio frequency signals, since the radio frequency spectrum occupies only a small portion of the entire electromagnetic spectrum, and as user demand for the internet increases, the less and less radio frequency spectrum is available for WiFi technology; therefore, when the WiFi technology is used to realize wireless screen projection, there may be a problem that a radio frequency signal for wireless screen projection is interfered by other radio frequency signals with different purposes but the same frequency in an environment as a radio frequency signal for wireless screen projection, which may cause the radio frequency signal for wireless screen projection to be unstable, and there may also be a problem that a data transmission speed is slow, which further causes a delay in data transmission during screen projection, a screen projection picture is stuck, and a screen projection experience of a user is poor.
Therefore, in the related art, the wireless screen projection can be realized by utilizing the LiFi technology. The LiFi technology is a technology for wireless transmission of data using the visible spectrum (e.g., light emitted from a bulb); in particular, the LiFi technology can transmit data by controlling a light emitting device (such as an LED) to emit a high-speed blinking signal unrecognizable to the naked eye through an electric signal. Because the width of the visible light spectrum can reach 1 ten thousand times of the width of the radio frequency spectrum, the bandwidth corresponding to the LiFi technology is higher than that corresponding to the WiFi technology, and can generally reach the bandwidth of Gbps level.
However, since visible light cannot penetrate an object (such as a wall), if the transmission path of visible light is blocked, the optical signal is cut off; therefore, when the wireless screen projection is realized by using the LiFi technology, the screen projection interruption problem may exist, and the screen projection experience of the user is poor.
Based on this, in various embodiments of the present application, a LiFi technology and a WiFi technology are combined to achieve wireless screen projection from one electronic device to another electronic device, where a LiFi link between two electronic devices is not disconnected, the LiFi link is used to transmit data to perform screen projection, and a WiFi link between two electronic devices is used to perform screen projection when a shielding object appears between the two electronic devices and the LiFi link is disconnected; so, multimedia data's transmission speed when can improve and throw the screen to improve and throw the stability of screen, and then reduce and throw the card pause phenomenon of screen in-process, promote user's the experience of throwing the screen.
The embodiment of the application provides a wireless screen projection method, as shown in fig. 1, the method comprises the following steps:
step 101: under the condition that a LiFi link established between first electronic equipment and second electronic equipment is not disconnected, the first electronic equipment transmits multimedia data to the second electronic equipment by using the LiFi link so that the second electronic equipment can present the multimedia data;
here, the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device;
step 102: and under the condition that the LiFi link is disconnected, the first electronic device sends multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data.
The wireless screen projection method provided by the embodiment of the application is applied to a first electronic device; the first electronic device and the second electronic device may be any device capable of a LiFi connection and a WiFi connection; illustratively, the first electronic device may be a user terminal; the user terminal may include a Personal Computer (PC), a mobile phone, and the like; the PC may include a desktop computer, a notebook computer, a tablet computer, a vehicle-mounted computer, etc.; the second electronic device may be the user terminal, or may be an electronic device capable of presenting a screen projection screen, such as a television or a projector.
In practical application, before executing step 101 or step 102, the first electronic device needs to determine the state of the LiFi link; accordingly, the method may further comprise:
after establishing a LiFi link with the second electronic device (i.e. in the process of sending multimedia data to the second electronic device by using the LiFi link), the first electronic device monitors the state of the LiFi link; the status of the LiFi link may include the LiFi link being disconnected and the LiFi link being connected.
In practical application, the first electronic device may monitor the state of the LiFi link by sending a heartbeat packet.
Based on this, in an embodiment, the method may further include:
and the first electronic equipment monitors whether the LiFi link is disconnected or not in a heartbeat packet sending mode.
Specifically, in practical application, the first electronic device may send a heartbeat message (i.e., the heartbeat packet) to the second electronic device every N (N is greater than 0) milliseconds based on a preset heartbeat packet mechanism, and after receiving the heartbeat message, the second electronic device replies the same heartbeat message to the first electronic device; if the first electronic device does not receive any information including heartbeat information sent by the second electronic device within a preset time period, for example, M milliseconds (M is greater than 0 and M is greater than N), the first electronic device may determine that the heartbeat is over time, and may determine that the LiFi link is disconnected. Here, the values of N and M may be preset by the developer according to the requirement, for example, 2 milliseconds.
In practical application, before monitoring the state of the LiFi link, the first electronic device needs to determine a second electronic device and establish the LiFi link with the second electronic device.
Based on this, in an embodiment, the method may further include:
the first electronic equipment detects equipment capable of carrying out LiFi screen projection; determining the detected equipment capable of performing LiFi screen projection as the second electronic equipment;
the first electronic device and the second electronic device establish a LiFi link; and establishing a WiFi link with the second electronic device.
Specifically, in practical application, the first electronic device may transmit an optical signal carrying first information every X milliseconds (X is greater than 0); the first information may comprise at least a first identity characterizing the first electronic device; of course, the first information may also include a LiFi configuration parameter of the first electronic device; the LiFi configuration parameters may include a frame structure, a data encryption manner, and the like. When the device capable of performing LiFi screen projection in the environment where the first electronic device is located receives the optical signal carrying the first information, an optical signal carrying second information may be returned to the first electronic device; the second information may comprise at least a second identity characterizing the respective electronic device; of course, the second information may also include LiFi configuration parameters of the respective electronic device. When the first electronic device receives the optical signal carrying the second information sent by the corresponding electronic device, it can be determined that a device capable of performing LiFi screen projection is detected, and the electronic device corresponding to the second information is determined as the second electronic device. Here, the value of X may be preset by a developer according to a requirement, for example, 3 milliseconds.
In practical application, after the first electronic device determines the second electronic device, information interaction can be performed with the second electronic device through an optical signal, so that establishment of a LiFi link is completed; after the LiFi link is successfully established, the first electronic device may perform information interaction (for example, matching a WiFi key) with the second electronic device through a radio frequency signal, so as to complete establishment of a WiFi link.
In practical application, a shielding object may exist between the first electronic device and a device capable of performing LiFi screen projection, so that the first electronic device does not detect the device capable of performing LiFi screen projection; at this time, the device capable of LiFi screen projection, that is, the second electronic device may be manually determined by the user.
Based on this, in an embodiment, in a case that the first electronic device does not detect a device capable of LiFi screen projection, the method may further include:
the first electronic device determining the second electronic device based on the first information; establishing a WiFi link with the second electronic equipment; the first information is generated based on a first operation performed on the first electronic device; the first operation is an operation related to a screen-casting event.
Specifically, in practical application, a research and development staff may preset a first time period (for example, 10 seconds) in the first electronic device according to a requirement, and when the first electronic device does not receive optical signals carrying second information and sent by other electronic devices within the first time period, it may be determined that a device capable of performing LiFi screen projection is not detected. At this time, the first electronic device may present third information, where the third information is used to prompt a user to manually select a screen-casting device (for example, the third information may include a list of screen-casting devices, where the list of screen-casting devices may include devices that cannot perform LiFi screen casting and devices that can perform LiFi screen casting); the user can perform the first operation on the first electronic device based on the third information, so that the first electronic device determines a device capable of performing LiFi screen projection, that is, determines the second electronic device. The first operation can be any operation related to a screen projection event, such as touch operation, key operation and the like. After the first electronic device determines the second electronic device, the first electronic device may perform information interaction (for example, matching a WiFi key) with the second electronic device through a radio frequency signal, so as to complete establishment of a WiFi link.
In practical application, a shelter (namely, a shelter between the first electronic device and the second electronic device) which causes that the first electronic device does not detect a device capable of performing LiFi screen projection may be removed; therefore, in order to increase the speed of transmitting multimedia data to the second electronic device, the first electronic device should preferentially transmit multimedia data to the second electronic device using the LiFi link; that is to say, in the process of sending the multimedia data to the second electronic device by using the WiFi link, the first electronic device needs to monitor whether a LiFi link can be established with the second electronic device, and when it is monitored that the LiFi link can be established with the second electronic device, establish the LiFi link with the second electronic device, and send the multimedia data to the second electronic device by using the LiFi link, so that the second electronic device presents the multimedia data; therefore, the speed of sending multimedia data to the second electronic device by the first electronic device can be increased, the pause phenomenon in the screen projection process is reduced, and the screen projection experience of a user is improved.
Accordingly, the method may further comprise:
in the process of sending multimedia data to the second electronic equipment by using the WiFi link, the first electronic equipment monitors whether a LiFi link can be established with the second electronic equipment;
under the condition that a LiFi link can be established with the second electronic device, the first electronic device and the second electronic device establish the LiFi link; and sending multimedia data to the second electronic device by using the LiFi link so that the second electronic device can present the multimedia data.
In practical application, the first electronic device may monitor whether a LiFi link can be established with the second electronic device in the same manner as that for detecting devices capable of performing LiFi screen projection; specifically, in the process of sending multimedia data to the second electronic device by using the WiFi link, the first electronic device may send an optical signal carrying first information to the second electronic device every X milliseconds; under the condition that a shelter between the first electronic device and the second electronic device is removed, the second electronic device can receive the optical signal carrying the first information and return the optical signal carrying the second information to the first electronic device; when the first electronic device receives the optical signal carrying the second information sent by the second electronic device, it can be determined that a LiFi link can be established with the second electronic device; and carrying out information interaction with the second electronic equipment through the optical signal so as to complete the establishment of the LiFi link.
In practical application, as described above, in the process of sending multimedia data to the second electronic device by using the LiFi link, the first electronic device may monitor the state of the LiFi link (i.e., monitor whether the LiFi link is disconnected) by sending a heartbeat packet; under the condition that the LiFi link is not disconnected, the first electronic device sends multimedia data to the second electronic device through the LiFi link; under the condition that the LiFi link is monitored to be disconnected, the first electronic device sends multimedia data to the second electronic device through the WiFi link; so, multimedia data's transmission speed when can improve and throw the screen to improve and throw the stability of screen, and then reduce and throw the card pause phenomenon of screen in-process, promote user's the experience of throwing the screen. .
In practical applications, the first electronic device may include a LiFi module for LiFi connection with other electronic devices and a WiFi module (such as a WiFi antenna) for WiFi connection with other electronic devices; in the process of sending multimedia data to the second electronic device by using the LiFi link, the first electronic device sends the multimedia data to the second electronic device through the LiFi module; when the LiFi link is monitored to be disconnected, the first electronic device needs to switch the LiFi module to the WiFi module so as to switch multimedia data to the WiFi link for transmission.
Based on this, in an embodiment, in a case that the first electronic device monitors that the LiFi link is disconnected, the method may further include:
switching a LiFi module of the first electronic device to a WiFi antenna of the first electronic device to switch multimedia data to the WiFi link for transmission; wherein,
the LiFi module can realize the interconversion between radio frequency signal and the light signal at least.
In practical application, a shelter is arranged between the first electronic device and the second electronic device, so that the shelter between the first electronic device and the second electronic device can be removed after the LiFi link is disconnected; therefore, in order to increase the speed of transmitting multimedia data to the second electronic device, the first electronic device should preferentially transmit multimedia data to the second electronic device using the LiFi link; that is to say, in the process of sending multimedia data to the second electronic device by using the WiFi link, the first electronic device needs to monitor whether the LiFi link is recovered, and after monitoring that the LiFi link is recovered, send multimedia data to the second electronic device by using the LiFi link, so that the second electronic device presents the multimedia data; therefore, the speed of sending multimedia data to the second electronic device by the first electronic device can be increased, the pause phenomenon in the screen projection process is reduced, and the screen projection experience of a user is improved.
Based on this, in an embodiment, the method may further include:
after multimedia data are switched to the WiFi link for transmission, the first electronic device monitors whether the LiFi link is recovered or not in the process of sending the multimedia data to the second electronic device by using the WiFi link;
and after monitoring that the LiFi link is recovered, the first electronic device switches the WiFi antenna to the LiFi module so as to switch multimedia data to the LiFi link for transmission.
In practical application, the first electronic device may monitor whether the LiFi link is recovered by sending a heartbeat packet.
In practical applications, the first electronic device may include a switch connected to the LiFi module and the WiFi antenna, and the switch is controlled to switch between the LiFi module and the WiFi antenna.
Based on this, in an embodiment, the method may further include:
the first electronic device utilizes a first switch to switch between the LiFi module and the WiFi antenna.
According to the wireless screen projection method provided by the embodiment of the application, under the condition that a LiFi link established between first electronic equipment and second electronic equipment is not disconnected, the first electronic equipment sends multimedia data to the second electronic equipment by using the LiFi link, so that the second electronic equipment can present the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device; under the condition that the LiFi link is disconnected, the first electronic device sends multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data; so, multimedia data's transmission speed when can improve and throw the screen to improve and throw the stability of screen, and then reduce and throw the card pause phenomenon of screen in-process, promote user's the experience of throwing the screen.
The present application will be described in further detail with reference to the following application examples.
The present application embodiment provides a wireless screen projection device, as shown in fig. 2, the wireless screen projection device includes: an Application Processor (AP) 201, a wireless Transceiver (WiFi Transceiver)202, a 2.4G wireless module (WiFi 2.4G)203, a 5G wireless module (WiFi 5G)204, a Radio Frequency (RF) Switch (Switch)205, a signal conversion unit 206, a WiFi Antenna (ANT, Antenna)207, a Driver (Driver)208, an optical front end 209, an Amplifier (Amplifier)210, and an optoelectronic device 211; wherein,
the AP 201 is configured to receive and transmit radio frequency signals through the WiFi transmitter 202; correspondingly processing the received radio frequency signal; monitoring (i.e. monitoring) the state of the LiFi path through the heartbeat packet; based on the monitored state of the LiFi path, outputting a control signal to the RF Switch205 through its General Purpose Input/Output (General Purpose Input Output) interface to control the RF Switch205 to perform mutual switching between the signal conversion unit 206 and the WiFiANT 207;
the WiFi transmitter 202, configured to perform radio frequency signal interaction with the signal conversion unit 206 through the RF Switch 205; and performs radio frequency signal interaction with other electronic devices through the RF Switch205 and the WiFi ANT 207;
the WiFi 2.4G 203 is used for supporting the receiving and the sending of radio frequency signals with the frequency band between 2.400 gigahertz (GHz) and 2.4835 GHz;
the WiFi 5G 204 is used for supporting the receiving and sending of radio frequency signals with the frequency band above 5 GHz;
the RF Switch205 is configured to perform mutual switching between the signal conversion unit 206 and the WiFi ANT 207;
the signal conversion unit 206 is configured to convert the radio frequency signal received from the WiFi transmitter 202 into a baseband signal and send the baseband signal to the Driver 208; converting the electrical signal received from the Amplifier 210 into a radio frequency signal and sending the radio frequency signal to the WiFi Transceiver 202;
the WiFi ANT 207 is used for supporting receiving and transmitting radio frequency signals;
the Driver 208 is configured to drive the optical front end 209 by using the received baseband signal;
the optical front end 209 is configured to convert a baseband signal into an optical signal and transmit the converted optical signal;
the optoelectronic element 211 is configured to detect an optical signal, convert the detected optical signal into an electrical signal, and send the electrical signal to the Amplifier 210;
the Amplifier 210 is configured to perform low-noise amplification processing on the electrical signal sent by the optoelectronic device 211, and send the amplified electrical signal to the signal conversion unit 206.
Here, on the optical signal Transmission (TX) path of the wireless projection device, the Driver 208 and the optical front end 209 perform corresponding processing to transmit an optical signal; on an optical signal Receiving (RX) path of the wireless screen projection device, the Amplifier 210 and the photoelectric element 211 perform corresponding processing so as to receive an optical signal.
In practical applications, the signal conversion unit 206 may be implemented based on a mixer; the optical front end 209 may be an Infrared (IR) emitter, such as a Vertical-Cavity Surface-Emitting Laser (VCSEL); the photo element 211 may be a photodiode, such as an Avalanche Photodiode (APD).
In practical application, the wireless screen projection device provided by the application embodiment can be realized based on a WiFi chip; that is, the wireless screen projection device may be implemented based on a WiFi transmitter, a WiFi 2.4G, WiFi 5G, and a WiFi ANT on a WiFi chip in the related art.
Here, the functions of the signal conversion unit 206, the Driver 208, the optical front end 209, the Amplifier 210, and the photoelectric element 211 are equivalent to the functions of the LiFi module according to the wireless screen projection method shown in fig. 1; the function of the RF Switch205 is equivalent to that of the first Switch described in the wireless screen projection method shown in fig. 1.
The wireless screen projection method provided by the embodiment of the application is described in detail below based on the wireless screen projection device.
It should be noted that the LiFi path in the present application example refers to: a transmission path of a LiFi signal (i.e., an optical signal) between a wireless screen projection apparatus (i.e., the first electronic device) and a screen projection device (i.e., the second electronic device), that is, the LiFi path does not include a physical transmission path of the LiFi signal inside the wireless screen projection apparatus and the screen projection device (e.g., an optical signal TX path and an optical signal RX path of the wireless screen projection apparatus); the LiFi link of the wireless screen projection method shown in fig. 1 includes the LiFi path and a physical transmission path of the LiFi signal inside the wireless screen projection apparatus and the screen projection device. Correspondingly, the WiFi access in this application embodiment refers to: a transmission path of WiFi signals (namely radio frequency signals) between the wireless screen projection device and the screen projection equipment; the WiFi link of the wireless screen projection method shown in fig. 1 includes the WiFi access and a physical transmission path of the WiFi signal inside the wireless screen projection apparatus and the screen projection device.
When the screen is thrown, the wireless screen throwing device periodically emits LiFi signals, and whether the screen throwing equipment is detected is judged according to whether the LiFi signals returned by the screen throwing equipment are received. If the wireless screen projection device does not detect the screen projection equipment within a certain time range (such as 1 minute), a user can manually select the screen projection equipment as a screen projection object on the wireless screen projection device; after the wireless screen projection device determines the screen projection equipment based on the operation of a user, the wireless screen projection device can perform information interaction with the screen projection equipment based on WiFi signals (namely, the wireless screen projection device and the screen projection equipment automatically perform WiFi key matching) so as to establish a WiFi access, and multimedia data are sent to the screen projection equipment through the WiFi access so that the screen projection equipment can present the multimedia data (namely, screen projection display is performed). The wireless screen projection device needs to monitor (namely monitor) whether a LiFi signal of the screen projection equipment appears or not in the screen projection process of the screen projection equipment based on the WiFi access; when the wireless screen projection device monitors that a LiFi signal of the screen projection equipment appears, the wireless screen projection device can perform information interaction with the screen projection equipment based on the LiFi signal so as to establish a LiFi path; meanwhile, the AP 201 in the wireless screen projection device controls the RFSwitch 205 to switch the WiFi ANT 207 to the signal conversion unit 206, so that the wireless screen projection device projects a screen on the screen projection device through the LiFi path.
When the screen is started to be projected, if the screen projecting device is detected by the wireless screen projecting device within a certain time range, the wireless screen projecting device and the screen projecting device can perform information interaction based on a LiFi signal to establish a LiFi passage, and multimedia data are sent to the screen projecting device through the LiFi passage so that the screen projecting device can present the multimedia data. After the screen projection equipment successfully projects the screen based on the LiFi channel, the wireless screen projection device performs information interaction with the screen projection equipment based on WiFi signals (namely, the wireless screen projection device automatically performs WiFi key matching with the screen projection equipment) to establish a WiFi channel, keep the communication of the WiFi channel (namely, keep the wireless screen projection device and the screen projection equipment capable of utilizing the WiFi channel to perform data transmission), and disable the WiFi connection function of the screen projection equipment; that is, the screen projection device cannot establish a WiFi access with other electronic devices outside the wireless screen projection device.
The wireless screen projection device needs to detect (i.e. monitor) whether the LiFi path is cut off or not in the screen projection process of the screen projection equipment based on the LiFi path; when the wireless screen projection device detects that the LiFi path is cut off, an AP 201 in the wireless screen projection device controls an RF Switch205 to Switch a signal conversion unit 206 to a WiFi ANT 207, so that the wireless screen projection device projects a screen on the screen projection equipment through the WiFi path; meanwhile, the wireless screen projection device needs to monitor whether a LiFi signal of the screen projection equipment appears (i.e., monitor whether the cut-off LiFi path is recovered), and when the LiFi signal of the screen projection equipment appears, the LiFi path is determined to be recovered, and the AP 201 controls the RF Switch205 to Switch the WiFi ANT 207 to the signal conversion unit 206, so that the wireless screen projection device projects a screen on the screen projection equipment through the LiFi path again.
Here, a specific implementation process of the wireless screen projection method provided by this application embodiment is the same as the specific implementation process of the wireless screen projection method shown in fig. 1, and is not described here again.
The wireless screen projection method provided by the application embodiment integrates the LiFi technology and the WiFi technology, a LiFi passage and a WiFi passage are established between the wireless screen projection device and the screen projection equipment, and multimedia data are transmitted by taking the LiFi passage as a main passage and the WiFi passage as an auxiliary passage. Specifically, by detecting the integrity of the LiFi path (i.e. detecting whether the LiFi path is cut off), the "seamless switching" between the LiFi path and the WiFi path is realized in real time and reasonably (i.e. the LiFi path is preferentially used for screen projection). The process of screen projection by adopting the wireless screen projection method provided by the application embodiment has the advantages of both the LiFi technology and the WiFi technology:
firstly, the wireless screen projection device monitors screen projection equipment based on a LiFi technology, and has strong directionality; that is to say, when the LiFi path is established between the wireless screen projection device and the screen projection equipment, the LiFi path between the wireless screen projection device and the screen projection equipment can be established quickly only by directing the wireless screen projection device to the screen projection equipment without manual operation of a user, and the rapidity of screen projection connection is realized through the LiFi technology;
secondly, the wireless screen projection device sends multimedia data to the screen projection equipment based on a LiFi (light Fidelity) channel, the data transmission speed is high, LiFi signals used for transmitting data are not easily interfered by other signals, and the screen projection stability and high speed are realized through a LiFi technology;
thirdly, under the condition of the disconnection of the LiFi access, the wireless screen projection device can send multimedia data to the screen projection equipment based on the WiFi access, and the WiFi access is not easy to cut off, so that the screen projection stability is further improved through the WiFi technology.
In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a wireless screen projection device, which is disposed on a first electronic device, as shown in fig. 3, and includes a first processing unit 31 and a second processing unit 32; wherein,
the first processing unit 31 is configured to, when a LiFi link established with a second electronic device is not disconnected, send multimedia data to the second electronic device by using the LiFi link, so that the second electronic device presents the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device;
the second processing unit 32 is configured to, when the LiFi link is disconnected, send multimedia data to the second electronic device by using a WiFi link established with the second electronic device, so that the second electronic device presents the multimedia data.
In one embodiment, the wireless screen projection device further comprises a monitoring unit; the monitoring unit is used for monitoring disconnection of the LiFi link;
correspondingly, the second processing unit 32 is specifically configured to:
switching a LiFi module of the first electronic device to a WiFi antenna of the first electronic device to switch multimedia data to the WiFi link for transmission; wherein,
the LiFi module can realize the interconversion between radio frequency signal and the light signal at least.
In an embodiment, after the multimedia data is switched to the WiFi link for transmission, the monitoring unit is further configured to monitor whether the LiFi link is recovered;
correspondingly, after the monitoring unit monitors that the LiFi link is recovered, the first processing unit 31 is specifically configured to:
and switching the WiFi antenna to the LiFi module so as to switch multimedia data to the LiFi link for transmission.
In an embodiment, the monitoring unit is further configured to monitor whether the LiFi link is disconnected by sending a heartbeat packet.
In an embodiment, the first processing unit 31 and the second processing unit 32 are further configured to:
and switching between the LiFi module and the WiFi antenna by using a first switch of the first electronic device.
In one embodiment, the wireless screen projection device further comprises a detection unit and a third processing unit; wherein,
the detection unit is used for detecting equipment capable of performing LiFi screen projection; determining the detected equipment capable of performing LiFi screen projection as the second electronic equipment;
the third processing unit is used for establishing a LiFi link with the second electronic equipment; and establishing a WiFi link with the second electronic device.
In an embodiment, in a case that the detection unit does not detect a device capable of performing LiFi screen projection, the third processing unit is further configured to:
determining the second electronic device based on the first information; establishing a WiFi link with the second electronic equipment; the first information is generated based on a first operation performed on the first electronic device; the first operation is an operation related to a screen-casting event.
Here, the functions of the first processing unit 31, the second processing unit 32, the monitoring unit, the detecting unit, and the third processing unit are equivalent to the functions of the AP 201 in the application embodiment of the present application.
In practical applications, the first processing unit 31, the second processing unit 32, the monitoring unit, the detecting unit, and the third processing unit may be implemented by a processor in a wireless screen projection device in combination with a communication interface.
It should be noted that: the wireless screen projection device provided in the above embodiment is exemplified by only dividing the program modules, and in practical application, the processing distribution may be completed by different program modules according to needs, that is, the internal structure of the wireless screen projection device is divided into different program modules, so as to complete all or part of the processing described above. In addition, the wireless screen projection device and the wireless screen projection method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.
In order to implement the method of the embodiment of the present application, an embodiment of the present application further provides a chip, which is disposed on the first electronic device, as shown in fig. 4, where the chip 40 includes:
an interface 41 for information interaction with the memory;
and the processor 42 is connected with the interface 41 to realize information interaction with the memory, and is used for reading the computer program stored in the memory through the interface 41 and executing the method provided by one or more technical schemes when the computer program is run.
In practice, as shown in fig. 4, the chip 40 may further include a memory 43, and the memory 43 is used for storing various types of data to support the operation of the chip 40. Examples of such data include: any computer program for operating on chip 40.
Of course, the developer may also store the computer program capable of running on the processor 42 by the memory of the first electronic device where the chip 40 is located, without providing a memory in the chip 40 according to the chip design requirement.
In particular, the processor 42 is configured to perform the following operations:
under the condition that a LiFi link established with a second electronic device is not disconnected, multimedia data are sent to the second electronic device by using the LiFi link, so that the second electronic device can present the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device;
and under the condition that the LiFi link is disconnected, sending multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data.
In one embodiment, in the event that the LiFi link is disconnected, the processor 42 is further configured to:
switching a LiFi module of the first electronic device to a WiFi antenna of the first electronic device to switch multimedia data to the WiFi link for transmission; wherein,
the LiFi module can realize the interconversion between radio frequency signal and the light signal at least.
In an embodiment, after switching multimedia data to the WiFi link for transmission, the processor 42 is further configured to:
monitoring the LiFi link;
and switching the WiFi antenna to the LiFi module after monitoring that the LiFi link is recovered so as to switch multimedia data to the LiFi link for transmission.
In one embodiment, the processor 42 is further configured to:
and monitoring whether the LiFi link is disconnected or not by sending a heartbeat packet.
In one embodiment, the processor 42 is further configured to:
and switching between the LiFi module and the WiFi antenna by using a first switch of the first electronic device.
In one embodiment, the processor 42 is further configured to:
detecting equipment capable of carrying out LiFi screen projection; determining the detected equipment capable of performing LiFi screen projection as the second electronic equipment;
establishing a LiFi link with the second electronic device; and establishing a WiFi link with the second electronic device.
In an embodiment, in the case that no device capable of LiFi screen projection is detected, the processor 42 is further configured to:
determining the second electronic device based on the first information; establishing a WiFi link with the second electronic equipment; the first information is generated based on a first operation performed on the first electronic device; the first operation is an operation related to a screen-casting event.
It should be noted that: the process of the processor 42 specifically executing the above operations is detailed in the method embodiment, and is not described here again.
Based on the hardware implementation of the program module, and in order to implement the method of the embodiment of the present application, an embodiment of the present application further provides an electronic device, specifically the first electronic device; as shown in fig. 5, the electronic apparatus 50 includes:
a communication interface 51 capable of performing information interaction with another electronic device (for example, the second electronic device);
the processor 52 is connected with the communication interface 51 to realize information interaction with other electronic devices, and is used for executing the method provided by one or more technical schemes when running a computer program;
a memory 53 for storing a computer program capable of running on the processor 52.
In particular, the processor 52 is configured to perform the following operations:
under the condition that a LiFi link established with a second electronic device is not disconnected, multimedia data are sent to the second electronic device by using the LiFi link, so that the second electronic device can present the multimedia data; the electronic device 50 is capable of establishing a LiFi link and a WiFi link with the second electronic device;
and under the condition that the LiFi link is disconnected, sending multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data.
In one embodiment, in the event that the LiFi link is disconnected, the processor 52 is further configured to:
switching a LiFi module of the electronic device 50 to a WiFi antenna of the electronic device 50 to switch multimedia data to the WiFi link for transmission; wherein,
the LiFi module can realize the interconversion between radio frequency signal and the light signal at least.
In an embodiment, after switching multimedia data to the WiFi link for transmission, the processor 52 is further configured to:
monitoring the LiFi link;
and switching the WiFi antenna to the LiFi module after monitoring that the LiFi link is recovered so as to switch multimedia data to the LiFi link for transmission.
In one embodiment, the processor 52 is further configured to perform the following operations:
and monitoring whether the LiFi link is disconnected or not by sending a heartbeat packet.
In one embodiment, the processor 52 is further configured to perform the following operations:
switching between the LiFi module and the WiFi antenna is performed using a first switch of the electronic device 50.
In one embodiment, the processor 52 is further configured to perform the following operations:
detecting equipment capable of carrying out LiFi screen projection; determining the detected equipment capable of performing LiFi screen projection as the second electronic equipment;
establishing a LiFi link with the second electronic device; and establishing a WiFi link with the second electronic device.
In an embodiment, in the case that no device capable of LiFi screen projection is detected, the processor 52 is further configured to:
determining the second electronic device based on the first information; establishing a WiFi link with the second electronic equipment; the first information is generated based on a first operation performed on the electronic device 50; the first operation is an operation related to a screen-casting event.
It should be noted that: the process of the processor 52 specifically executing the above operations is detailed in the method embodiment, and is not described here again.
Of course, in practice, the various components of the electronic device 50 may be coupled together by a bus system 54. It will be appreciated that the bus system 54 is used to enable communications among the components. The bus system 54 includes a power bus, a control bus, and a status signal bus in addition to the data bus. For clarity of illustration, however, the various buses are labeled as bus system 54 in fig. 5.
The method disclosed in the above embodiments of the present application may be applied to the processor 52, or implemented by the processor 52. Processor 52 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 52. The Processor 52 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 52 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 53, and the processor 52 reads the information in said memory 53 and in combination with its hardware performs the steps of the aforementioned method.
In an exemplary embodiment, the electronic Device 50 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field-Programmable Gate arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.
It will be appreciated that the memory of embodiments of the present application (e.g., memory 43 in chip 40 or memory 53 in electronic device 50) may be volatile memory or non-volatile memory, and may include both volatile and non-volatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an erasable Programmable Read-Only Memory (EPROM), an electrically erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a ferromagnetic access Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data rate Synchronous Dynamic Random Access Memory), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous link Dynamic Random Access Memory (SLDRAM, Synchronous Dynamic Random Access Memory (DRAM), Direct Memory (DRM, Random Access Memory). The memories described in the embodiments of the present application are intended to comprise, without being limited to, these and any other suitable types of memory.
In an exemplary embodiment, the present application further provides a storage medium, i.e. a computer storage medium, specifically a computer readable storage medium, such as a memory 43 in the chip 40, storing a computer program, where the computer program stored in the memory 43 can be executed by the processor 42 in the chip 40 to complete the steps of the foregoing method. As another example, the memory 53 stores a computer program, and the computer program stored in the memory 53 can be executed by the processor 52 in the electronic device 50 to perform the steps of the method. The computer readable storage medium may be memory such as FRAM, ROM, PROM, EPROM, EEPROM, FlashMemory, magnetic surface memory, optical disk, or CD-ROM.
In the several embodiments provided in the present application, it should be understood that the disclosed method and intelligent device may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.
Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or portions thereof contributing to the prior art may be embodied in the form of a software product stored in a storage medium, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The technical means described in the embodiments of the present application may be arbitrarily combined without conflict.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (11)
1. A wireless screen projection method is characterized by comprising the following steps:
under the condition that a visible light wireless communication LiFi link established between first electronic equipment and second electronic equipment is not disconnected, the first electronic equipment transmits multimedia data to the second electronic equipment by using the LiFi link so that the second electronic equipment can present the multimedia data; the first electronic device can establish a LiFi link and a wireless network WiFi link with the second electronic device;
and under the condition that the LiFi link is disconnected, the first electronic device sends multimedia data to the second electronic device by utilizing a WiFi link established with the second electronic device, so that the second electronic device can present the multimedia data.
2. The method of claim 1, further comprising:
the first electronic equipment monitors that the LiFi link is disconnected;
switching a LiFi module of the first electronic device to a WiFi antenna of the first electronic device to switch multimedia data to the WiFi link for transmission; wherein,
the LiFi module can realize the interconversion between radio frequency signal and the light signal at least.
3. The method of claim 2, further comprising:
after multimedia data are switched to the WiFi link for transmission, the first electronic equipment monitors the LiFi link;
and after monitoring that the LiFi link is recovered, the first electronic device switches the WiFi antenna to the LiFi module so as to switch multimedia data to the LiFi link for transmission.
4. The method of claim 2, further comprising:
and the first electronic equipment monitors whether the LiFi link is disconnected or not in a heartbeat packet sending mode.
5. The method of claim 2, further comprising:
the first electronic device utilizes a first switch to switch between the LiFi module and the WiFi antenna.
6. The method according to any one of claims 1 to 5, further comprising:
the first electronic equipment detects equipment capable of carrying out LiFi screen projection; determining the detected equipment capable of performing LiFi screen projection as the second electronic equipment;
the first electronic device and the second electronic device establish a LiFi link; and establishing a WiFi link with the second electronic device.
7. The method of claim 6, further comprising:
the first electronic device does not detect a device capable of LiFi screen projection;
the first electronic device determining the second electronic device based on the first information; establishing a WiFi link with the second electronic equipment; the first information is generated based on a first operation performed on the first electronic device; the first operation is an operation related to a screen-casting event.
8. A wireless screen projection device is arranged on a first electronic device and comprises:
the first processing unit is used for sending multimedia data to a second electronic device by utilizing a LiFi link under the condition that the LiFi link established with the second electronic device is not disconnected, so that the second electronic device can present the multimedia data; the first electronic device is capable of establishing a LiFi link and a WiFi link with the second electronic device;
and the second processing unit is used for sending multimedia data to the second electronic equipment by utilizing the WiFi link established with the second electronic equipment under the condition that the LiFi link is disconnected so as to enable the second electronic equipment to present the multimedia data.
9. A chip, comprising: a processor and an interface; wherein,
the processor is adapted to perform the steps of the method of any one of claims 1 to 7 when running the computer program.
10. An electronic device, comprising: a processor and a memory for storing a computer program capable of running on the processor; wherein,
the processor is adapted to perform the steps of the method of any one of claims 1 to 7 when running the computer program.
11. A storage medium storing a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 7 when executed by a processor.
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Application publication date: 20201016 |