WO2017008361A1 - Wireless data downlink transmission method and device - Google Patents

Abstract

The present invention discloses a wireless data downlink transmission method and device. The method comprises: determining whether a visible-light communication channel is available; if so, then controlling to use a Wi-Fi communication channel and the visible-light communication channel in parallel to downlink transmit data; and if not, then controlling to use a Wi-Fi communication channel to downlink transmit data. Compared with the prior art, the technical solution in the present invention has the following advantages: (1) Wi-Fi communication and visible light communication are combined, such that confidentiality of data transmission is improved by the excellent confidentiality of visible light communication; (2) if a visible-light communication channel is available, a Wi-Fi communication channel and the visible light communication channel are controlled to be used in parallel to downlink transmit data, thus increasing channels and the rate of data transmission; and (3) if a visible-light communication channel is not available, a Wi-Fi communication channel is controlled to be used to downlink transmit data, thus ensuring the stability of data transmission.

Description

Wireless data downlink transmission method and device Technical field

The invention belongs to the field of wireless communication, and relates to visible light communication (referred to as VLC, the full name of Visible Light Communication, also known as light fidelity or Li-Fi) and wireless local area network communication hybrid communication, and particularly relates to a data downlink transmission method and device.

Background technique

With the rapid development of technologies such as mobile terminals, network multimedia, and new Internet applications, the demand for wireless data communication has increased dramatically, which has brought enormous challenges to wireless communication technologies. Wireless communication can usually be divided into indoor and outdoor scenarios, in which about 70% of wireless communication data traffic occurs indoors. At present, the indoor wireless communication system mainly relies on wireless local area network (WLAN, the full name of Wireless Local Area Network) and mobile communication system, and the wireless local area network becomes the main indoor wireless communication because of higher throughput and lower tariff. Carrier.

However, WLAN technology has the following shortcomings in indoor use: (1) low confidentiality, data interception, network theft and high risk of data transmission; (2) increased indoor wireless radiation, not environmentally friendly .

In recent years, the fast-developing visible light communication has become an important alternative to indoor wireless communication because it can be combined with indoor lighting, has the advantages of green environmental protection and good confidentiality. Visible light communication is data transmission by blinking of a light emitting diode (LED) for illumination. Since the frequency of flickering can be much higher than the frequency that the human eye can feel, it does not adversely affect the human eye. In addition, since the communication medium is visible light, there is no problem of wireless radiation and it is easy to perform secure transmission.

However, the biggest disadvantage of visible light communication is instability: in order to perform visible light communication, it is usually necessary to have a direct path between transceivers, but such a direct path is easily interrupted temporarily in daily life, thereby interrupting visible light communication. For example, when an LED light on a ceiling transmits data to a user terminal, if someone passes by, there is a possibility that the direct path of the light may be blocked, thereby interrupting data communication. Therefore, relying solely on visible light for communication cannot satisfy people's requirements for communication reliability. Another disadvantage of visible light communication is that the implementation of two-way transmission is difficult. In the uplink transmission direction, since the light source of the user terminal is single and the intensity of the light is weak, which is not conducive to data transmission, how to make the access point of the visible light communication detect the light emitted by the user terminal is a very difficult problem. At present, the first international standard IEEE802.15.7 for visible light communication (hereinafter referred to as the 802.15.7 protocol) has been born. Since the standard is designed based on the premise of being able to perform uplink and downlink visible light communication, it is difficult to use for actual indoor data transmission. Currently, the 802.15.7 protocol uplink also uses visible light communication, so the user terminal must also install a high-power LED to ensure that the access point AP receives the terminal. The data is sent; simultaneous illumination of the upstream and downstream lights causes a large source of light pollution and reduces the transmission rate of visible light communication. Therefore, visible light communication is difficult to transmit in the uplink. In the downlink transmission direction, the visible light access point can transmit data to the user terminal through the LED lights of the ceiling. This is easy to implement: at the transmitting end, data can be transmitted to the LED light through the power line communication to generate the relevant optical signal; the user terminal only needs to install a photodetector to obtain data from the surrounding ceiling. The LED lighting on the ceiling is usually more and the luminous intensity is large, which is easy for the user to detect, so the visible light is highly feasible when it is transmitted downstream.

In summary, how to properly combine wireless local area network communication with visible light communication in an indoor wireless communication system can increase confidentiality and save resources and reduce radiation to a greater extent, which becomes a technical problem to be solved in the field.

Summary of the invention

To this end, the technical problem to be solved by the present invention is to provide an indoor wireless communication system that can increase confidentiality and save resources and reduce radiation to a greater extent.

To solve the above technical problem, the present invention provides a wireless data downlink sending method, including:

Determining whether a visible light communication channel is available;

If the visible light communication channel is available, controlling to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel, and if the visible light communication channel is not available, controlling to transmit data using the Wi-Fi communication channel.

Further, before the step of controlling to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel, the method further includes:

Determining whether the channel quality of the data transmission air interface of the visible light communication channel reaches a predetermined standard;

If the predetermined criteria are not met, the parameters of the visible light communication module are adjusted such that the data transmission air interface channel quality of the visible light communication channel reaches the standard.

Further, the step of controlling to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel includes:

Reading channel quality and communication status information of the Wi-Fi communication channel and the visible light communication channel;

Predicting communication capabilities of the Wi-Fi communication channel and the visible light communication channel according to the information;

Scheduling an appropriate amount of cached data queues to distribute to the Wi-Fi communication channel and the visible light communication channel according to the communication capability;

Controlling the Wi-Fi communication channel and the visible light communication channel to transmit the data queue in parallel downward.

Further, the Wi-Fi communication channel has at least two data transmission air ports.

Correspondingly, the present invention provides a wireless access point device, including:

a Wi-Fi communication module, a visible light communication module, and the Wi-Fi communication module and the visible light communication module, respectively Connected multi-channel logical link control layer;

The multi-channel logical link control layer is used to:

Determining whether the visible light communication channel of the visible light communication module is available, and if the visible light communication channel is available, controlling to use the Wi-Fi communication channel of the Wi-Fi communication module and the visible light communication channel to transmit data in parallel, if If the visible light communication channel is not available, then control is used to transmit data using the Wi-Fi communication channel.

Further, the device further includes a device management unit;

The multi-channel logical link control layer is further configured to determine whether a channel quality of the data transmission air interface of the visible light communication channel reaches a predetermined standard.

If the predetermined criterion is not met, the device management unit is controlled to adjust parameters of the visible light communication module such that the data transmission air interface channel quality of the visible light communication channel reaches the standard.

Further, the multi-channel logical link control layer is further configured to:

Reading channel quality and communication status information of the Wi-Fi communication channel and the visible light communication channel;

Predicting communication capabilities of the Wi-Fi communication channel and the visible light communication channel according to the information;

Distributing a cache data queue to the Wi-Fi communication channel and the visible light communication channel according to the communication capability;

Controlling the Wi-Fi communication channel and the visible light communication channel to transmit the data queue in parallel downward.

Further, the Wi-Fi communication channel has at least two data transmission air ports.

Correspondingly, the present invention also provides an indoor fusion channel communication system, including a user terminal and the above wireless access point device.

Correspondingly, the present invention further provides a wireless data downlink sending apparatus, including:

a first determining unit, configured to determine whether a visible light communication channel is available;

a first control unit, configured to control to transmit data in parallel using a Wi-Fi communication channel and the visible light communication channel if the visible light communication channel is available, and to control using Wi-Fi if the visible light communication channel is unavailable The communication channel transmits data downstream.

Further, the apparatus further includes: a second determining unit, configured to determine whether the data transmission air interface channel quality of the visible light communication unit reaches a predetermined standard; and a second control unit, configured to adjust if the predetermined standard is not met The parameters of the visible light communication module are such that the data transmission air interface channel quality of the visible light communication channel reaches the standard.

Further, the device further includes:

a reading unit, configured to read channel quality and communication state information of the Wi-Fi communication channel and the visible light communication channel;

a prediction unit, configured to predict, according to the information, communication performance of the Wi-Fi communication channel and the visible light communication channel force;

a scheduling unit, configured to distribute, according to the communication capability, a buffer data queue to the Wi-Fi communication channel and the visible light communication channel;

And a third control unit, configured to control the Wi-Fi communication channel and the visible light communication channel to send the data queue in parallel downlink.

Further, the Wi-Fi communication channel has at least two data transmission air ports.

Correspondingly, the present invention also provides an indoor fusion channel communication system, including a user terminal and the above-mentioned wireless data downlink transmission device.

The above technical solution of the present invention has the following advantages over the prior art:

(1) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light as a data transmission medium, radiation generated by using Wi-Fi communication is reduced, and environmental protection is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

DRAWINGS

In order to make the content of the present invention easier to understand, the present invention will be further described in detail below with reference to the accompanying drawings

1 is a flowchart of a method for transmitting a wireless data downlink according to Embodiment 1 of the present invention;

2 is a flowchart of a method for transmitting a wireless data downlink according to Embodiment 2 of the present invention;

3 is a flowchart of a method for transmitting a wireless data downlink according to Embodiment 3 of the present invention;

4 is a schematic diagram of a wireless access point device according to Embodiment 4 of the present invention;

FIG. 5 is a schematic diagram of a wireless data downlink sending apparatus according to Embodiment 5 of the present invention; FIG.

6 is a block diagram of a wireless data downlink transmitting apparatus according to Embodiment 6 of the present invention;

FIG. 7 is a schematic diagram of a wireless data downlink sending apparatus according to Embodiment 7 of the present invention; FIG.

8 is a block diagram of an indoor fusion channel communication system according to Embodiment 8 of the present invention;

FIG. 9 is a block diagram of an indoor fusion channel communication system according to Embodiment 9 of the present invention.

detailed description

The invention will be further illustrated by the following examples in conjunction with the accompanying drawings.

FIG. 1 is a flowchart of a method for transmitting a downlink data of a wireless data according to Embodiment 1 of the present invention, where the method includes:

In step S110, it is determined whether the visible light communication channel is available.

Specifically, it is determined whether the direct path of the light between the transmitting end and the receiving end is unblocked. If the channel is unblocked, it is determined that the visible light communication channel is available; if the obstacle is blocked, the light direct path is not smooth, and the visible light communication channel is determined. unavailable.

Step S120: If the visible light communication channel is available, control to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel.

Specifically, the Wi-Fi communication channel has at least two data transmission air ports, which are respectively a 2.4G air interface and a 5G air interface. The communication capacity of the 2.4G air interface is C1, the communication capacity of the 5G air interface is C2, and the communication capacity of the VLC air interface is C3. At this time, the communication capacity of the joint communication method is C≈C1+C2+C3. When the amount of downlink data is large, This scheme makes downlink data transmission more efficient due to a larger data transmission rate.

In a preferred embodiment, since the downlink communication is multi-channel transmission, the same data may be transmitted in different channels, and the multi-channel link control layer of the user terminal deletes the repeated data after receiving the repeated data, and The data is arranged according to the sequence.

Step S130, if the visible light communication channel is unavailable, control to transmit data using the Wi-Fi communication channel.

Specifically, since the visible light communication channel is unavailable at this time, the control uses the Wi-Fi communication channel to transmit data downstream, and the Wi-Fi communication channel has at least two data transmission air ports, which are respectively a 2.4G air interface and a 5G air interface. The communication capacity of the 2.4G air interface is C1, and the communication capacity of the 5G air interface is C2. The communication capacity at this time is C≈C1+C2.

This embodiment has the following advantages:

(1) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light as a data transmission medium, radiation generated by using Wi-Fi communication is reduced, and environmental protection is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

2 is a flowchart of a method for transmitting a downlink data of a wireless data according to Embodiment 2 of the present invention, where the method includes:

In step S210, it is determined whether the visible light communication channel is available.

Specifically, it is the same as step S110 of the first embodiment, and details are not described herein again.

Step S211, if the visible light communication channel is available, determine whether the data transmission air interface channel quality of the visible light communication channel reaches a predetermined standard.

Specifically, a standard is set for the data transmission air interface channel quality of the visible light communication channel, such as a transmission rate standard, a signal to noise ratio standard, and the like.

Step S212, if the predetermined criterion is not met, adjusting parameters of the visible light communication module, so that the data transmission air interface channel quality of the visible light communication channel reaches the standard.

Specifically, if the channel quality of the data transmission air interface of the visible light communication channel does not reach a predetermined standard, adjusting parameters of the visible light communication module, that is, parameters such as an illumination intensity, a color, and an optical clock rate of the LED matrix in this embodiment, The data transmission air interface channel quality of the visible light communication channel reaches the standard.

Step S220, controlling to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel.

Specifically, it is the same as step S120 of the first embodiment, and details are not described herein again.

Step S230, if the visible light communication channel is unavailable, control to transmit data using the Wi-Fi communication channel.

Specifically, it is the same as step S130 of the first embodiment, and details are not described herein again.

This embodiment has the following advantages:

(1) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light as a data transmission medium, radiation generated by using Wi-Fi communication is reduced, and environmental protection is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

(4) Pre-judging and adjusting the quality of visible light communication, further improving the efficiency and reliability of visible light communication.

FIG. 3 is a flowchart of a method for transmitting a downlink data of a wireless data according to Embodiment 3 of the present invention, where the method includes:

Step S310, determining whether the visible light communication channel is available.

Specifically, it is the same as step S110 of the first embodiment, and details are not described herein again.

Step S311, reading channel quality and communication state information of the Wi-Fi communication channel and the visible light communication channel.

Specifically, the channel quality and the communication state information of the Wi-Fi communication channel and the visible light communication channel air interface fed back in the uplink data are read, for example, the channel quality is good, general, and poor, and the communication state is smooth, general, and congested. Three grade.

Step S312, predicting communication capabilities of the Wi-Fi communication channel and the visible light communication channel according to the information.

Specifically, the communication capability level of the channel is predicted based on the information. For example, the rating is divided into four levels: strong, strong, weak, and weak. If the channel quality is good and the communication state is unblocked, the communication capability is predicted to be strong; if the channel quality is poor and the communication state is congested, the communication capability is predicted to be weak; the remaining states may be attributed to stronger and more different according to the focus. Weak level: If the channel quality is focused, the channel quality is normal, the communication status is smooth, or the general is predicted to be strong communication capability, the channel quality is poor, the communication status is smooth, or the communication is generally weak; the communication is weak. In the state, the communication state is general, the channel quality is good, or the general is predicted to be strong communication capability, and the communication state is congested, the channel quality is good, or the general is predicted to be weak communication capability.

Step S313, scheduling an appropriate amount of cache data queues to be distributed to the Wi-Fi communication channel and the visible light communication channel according to the communication capability.

Specifically, an appropriate amount of cached data is scheduled to the corresponding channel according to the pre-determined communication capability level. Generally, the amount of cached data scheduled according to the strong, strong, weak, and weakly scheduled communication capability levels is gradually reduced to adapt to its communication capability.

Step S314, controlling the Wi-Fi communication channel and the visible light communication channel to send the data queue in parallel downlink.

Specifically, it is the same as step S120 of the first embodiment, and details are not described herein again.

Step S330, if the visible light communication channel is unavailable, control to transmit data using the Wi-Fi communication channel.

Specifically, it is the same as step S130 of the first embodiment, and details are not described herein again.

This embodiment has the following advantages:

(1) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light as a data transmission medium, radiation generated by using Wi-Fi communication is reduced, and environmental protection is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

(4) predicting the communication capability according to the channel quality and communication state of each channel, scheduling an appropriate amount of data transmission tasks for different communication capabilities, and using the communication channels more reasonably and effectively, so that the data transmission efficiency is higher.

Correspondingly, the present invention further provides a wireless access point device. Referring to FIG. 4, it is provided in Embodiment 4 of the present invention. A frame diagram of a wireless access point device. As shown in FIG. 4, the wireless access point device 1 of the embodiment of the present invention includes:

The Wi-Fi communication module 11, the visible light communication module 12, and the multi-channel logical link control layer 13 connected to the Wi-Fi communication module 11 and the visible light communication module 12, respectively.

The multi-channel logical link control layer 13 is configured to: determine whether a visible light communication channel of the visible light communication module is available, and if the visible light communication channel is available, control Wi-Fi communication using the Wi-Fi communication module. The channel and the visible light communication channel transmit data in parallel, and if the visible light communication channel is not available, control to use the Wi-Fi communication channel to transmit data downstream.

Specifically, the Wi-Fi communication module 11 includes at least two data transmission air ports, one is 2.4G, and the other is 5G, and communicates with the 802.11n protocol by using the 802.11ac protocol respectively. The visible light communication module 12 includes at least one air interface and communicates using the 802.15.7 protocol. It is assumed that the communication capacity of the 2.4G air interface is C1, the communication capacity of the 5G air interface is C2, and the communication capacity of the VLC air interface is C3, then the communication capacity of the joint communication method is C≈C1+C2+C3, when the downlink data amount is large This scheme makes the downlink data transmission more efficient due to the larger data transmission rate.

The Wi-Fi communication module includes a connected physical layer and a MAC layer; the visible light communication module includes a connected physical layer and a MAC layer; the multi-channel logical link control layer and a MAC layer of the Wi-Fi communication module And the MAC layers of the visible light communication module are respectively connected. The multi-channel logic link control layer is implemented by using an FPGA (Field Programmable Gate Array, English-widely known as Field-Programmable Gate Array), a general-purpose processor, or a single-chip microcomputer.

Preferably, in another embodiment, the wireless access point device further includes a device management unit 14, in this embodiment, the multi-channel logical link control layer is further configured to determine data of the visible light communication channel. Whether the channel quality of the transmission air interface reaches a predetermined standard, if the predetermined criterion is not met, the device management unit 14 is controlled to adjust the parameters of the visible light communication module 12, so that the channel quality of the data transmission air interface of the visible light communication channel reaches the standard. .

Specifically, the multi-channel logical link control layer is implemented by using an FPGA (Field Programmable Gate Array, Field-Programmable Gate Array), a general-purpose processor, or a single-chip microcomputer. The predetermined criterion is a standard preset for the data transmission air interface channel quality of the visible light communication channel, such as a transmission rate standard, a signal to noise ratio standard, and the like. The parameters of the visible light communication module 12 are parameters such as the luminous intensity, color, and optical clock rate of the LED matrix in this embodiment.

Preferably, in another embodiment, the multi-channel logical link control layer is further configured to: read channel quality and communication state information of a Wi-Fi communication channel and a visible light communication channel; and predict the information according to the information a communication capability of a Wi-Fi communication channel and a visible light communication channel; scheduling, according to the communication capability, a buffer data queue to be distributed to the Wi-Fi communication channel and a visible light communication channel; controlling the Wi-Fi communication channel and the visible light communication channel The data queue is sent in parallel and downlink.

Specifically, the multi-channel logical link control layer is implemented by using an FPGA (Field Programmable Gate Array, Field-Programmable Gate Array), a general-purpose processor, or a single-chip microcomputer.

The use of the wireless access point device of the present invention to construct an indoor fusion channel communication system has the following advantages:

(1) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light as a data transmission medium, radiation generated by using Wi-Fi communication is reduced, and environmental protection is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

(4) Pre-judging and adjusting the quality of visible light communication, further improving the efficiency and reliability of visible light communication.

(5) predicting the communication capability according to the channel quality and communication state of each channel, scheduling an appropriate amount of data transmission tasks for different communication capabilities, and using each communication channel more reasonably and effectively, so that the data transmission efficiency is higher.

The present invention also provides a wireless data downlink transmitting apparatus, which will be described below in three embodiments.

FIG. 5 is a schematic diagram of a wireless data downlink sending apparatus according to Embodiment 5 of the present invention. The wireless data downlink transmitting apparatus includes a first determining unit 110 and a first control unit 120.

The first determining unit 110 is configured to determine whether a visible light communication channel is available.

Specifically, it is determined whether the direct path of the light between the transmitting end and the receiving end is unblocked. If the channel is unblocked, it is determined that the visible light communication channel is available; if the obstacle is blocked, the light direct path is not smooth, and the visible light communication channel is determined. unavailable.

The first control unit 120 is configured to control to transmit data in parallel using a Wi-Fi communication channel and the visible light communication channel if the visible light communication channel is available, and control to use if the visible light communication channel is unavailable. The Wi-Fi communication channel transmits data downstream.

Specifically, the Wi-Fi communication channel has at least two data transmission air ports, which are respectively a 2.4G air interface and a 5G air interface. The communication capacity of the 2.4G air interface is C1, the communication capacity of the 5G air interface is C2, and the communication capacity of the VLC air interface is C3. If the visible light communication channel is available, then the communication capacity of the joint communication mode is C≈C1+C2+C3. When the amount of downlink data is large, this scheme makes the downlink data transmission efficiency more efficient because of the larger data transmission rate. high. If the visible light communication channel is not available, then control is used to transmit data using the Wi-Fi communication channel, and the communication capacity at this time is C≈C1+C2.

This embodiment has the following advantages:

(1) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light as a data transmission medium, radiation generated by using Wi-Fi communication is reduced, and environmental protection is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

FIG. 6 is a schematic diagram of a wireless data downlink sending apparatus according to Embodiment 6 of the present invention. The wireless data downlink transmitting apparatus includes a first determining unit 210, a first control unit 220, a second determining unit 211, and a second control unit 212.

The first determining unit 210 is configured to determine whether a visible light communication channel is available.

Specifically, it is the same as the first determining unit 110 in the first embodiment, and details are not described herein again.

The first control unit 220 is configured to control to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel if the visible light communication channel is available, and control to use Wi- if the visible light communication channel is unavailable. The Fi communication channel transmits data downstream.

Specifically, it is the same as the first control unit 120 in the first embodiment, and details are not described herein again.

The second determining unit 211 is configured to determine whether the channel quality of the data transmission air interface of the visible light communication unit reaches a predetermined standard.

Specifically, a standard is set for the data transmission air interface channel quality of the visible light communication channel, such as a transmission rate standard, a signal to noise ratio standard, and the like.

The second control unit 212 is configured to adjust parameters of the visible light communication module if the predetermined standard is not met, so that the data transmission air interface channel quality of the visible light communication channel reaches the standard.

Specifically, if the channel quality of the data transmission air interface of the visible light communication channel does not reach a predetermined standard, adjusting parameters of the visible light communication module, that is, parameters such as an illumination intensity, a color, and an optical clock rate of the LED matrix in this embodiment, The data transmission air interface channel quality of the visible light communication channel reaches the standard.

This embodiment has the following advantages:

(1)) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light As a data transmission medium, it reduces the radiation caused by Wi-Fi communication and is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

(4) Pre-judging and adjusting the quality of visible light communication, further improving the efficiency and reliability of visible light communication.

FIG. 7 is a schematic diagram of a wireless data downlink sending apparatus according to Embodiment 7 of the present invention. The wireless data downlink transmitting apparatus includes a first determining unit 310, a first control unit 320, a reading unit 311, a prediction unit 312, a scheduling unit 313, and a third control unit 314.

The first determining unit 310 is configured to determine whether a visible light communication channel is available.

Specifically, it is the same as the first determining unit 110 in the first embodiment, and details are not described herein again.

a first control unit 320, configured to control, when the visible light communication channel is available, to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel, and if the visible light communication channel is unavailable, use the Wi- The Fi communication channel transmits data downstream.

Specifically, it is the same as the first control unit 120 in the first embodiment, and details are not described herein again.

The reading unit 311 is configured to read channel quality and communication state information of the Wi-Fi communication channel and the visible light communication channel.

Specifically, the channel quality and the communication state information of the Wi-Fi communication channel and the visible light communication channel air interface fed back in the uplink data are read, for example, the channel quality is good, general, and poor, and the communication state is smooth, general, and congested. Three levels.

The prediction unit 312 is configured to predict, according to the information, a communication capability of the Wi-Fi communication channel and the visible light communication channel.

Specifically, the communication capability level of the channel is predicted based on the information. For example, the rating is divided into four levels: strong, strong, weak, and weak. If the channel quality is good and the communication state is unblocked, the communication capability is predicted to be strong; if the channel quality is poor and the communication state is congested, the communication capability is predicted to be weak; the remaining states may be attributed to stronger and more different according to the focus. Weak level: If the channel quality is focused, the channel quality is normal, the communication status is smooth, or the general is predicted to be strong communication capability, the channel quality is poor, the communication status is smooth, or the communication is generally weak; the communication is weak. In the state, the communication state is general, the channel quality is good, or the general is predicted to be strong communication capability, and the communication state is congested, the channel quality is good, or the general is predicted to be weak communication capability.

The scheduling unit 313 is configured to distribute, according to the communication capability, a buffer data queue to the Wi-Fi communication channel. And visible light communication channel.

Specifically, an appropriate amount of cached data is scheduled to the corresponding channel according to the pre-determined communication capability level. Generally, the amount of cached data scheduled according to the strong, strong, weak, and weakly scheduled communication capability levels is gradually reduced to adapt to its communication capability.

The third control unit 314 is configured to control the Wi-Fi communication channel and the visible light communication channel to send the data queue in parallel downlink.

Specifically, the Wi-Fi communication channel has at least two data transmission air ports, which are respectively a 2.4G air interface and a 5G air interface. The communication capacity of the 2.4G air interface is C1, the communication capacity of the 5G air interface is C2, and the communication capacity of the VLC air interface is C3. At this time, the communication capacity of the joint communication method C≈C1+C2+C3, when the amount of downlink data is large, this scheme makes the downlink data transmission efficiency higher due to the larger data transmission rate.

This embodiment has the following advantages:

(1) In the process of downlink transmission of wireless data, Wi-Fi communication is combined with visible light communication, and since the confidentiality of visible light communication is good, the confidentiality of data transmission is increased. At the same time, since visible light communication utilizes existing indoor light as a data transmission medium, resources are saved to a greater extent. In addition, since visible light communication utilizes existing indoor light as a data transmission medium, radiation generated by using Wi-Fi communication is reduced, and environmental protection is environmentally friendly.

(2) When the visible light communication channel is available, the control uses the Wi-Fi communication channel and the visible light communication channel to transmit data in parallel, thereby increasing the channel and rate of data transmission.

(3) When the visible light communication channel is unavailable, the control uses the Wi-Fi communication channel to transmit data downstream, ensuring the stability of data transmission.

(4) predicting the communication capability according to the channel quality and communication state of each channel, scheduling an appropriate amount of data transmission tasks for different communication capabilities, and using the communication channels more reasonably and effectively, so that the data transmission efficiency is higher.

Correspondingly, the present invention further provides an indoor fusion channel communication system including a user terminal and the wireless access point device described in Embodiment 4 above. Please refer to FIG. 8. FIG. 8 is a structural diagram of an indoor fusion channel communication system according to Embodiment 8 of the present invention. The system includes a wireless access point device 1 and a user terminal 2.

Specifically, the wireless access point device 1 is the same as the wireless access point device 1 described in the foregoing fourth embodiment, and details are not described herein again.

The user terminal 2 includes a multi-channel logical link control layer, an upper layer application, and a communication portion that communicates with the Wi-Fi communication module 11 and the visible light communication module 12 of the wireless access device 1 for receiving the wireless connection. Data sent downstream of device 1.

Correspondingly, the present invention also provides a wireless terminal including the user terminal and the foregoing embodiments 5, 6, and 7. An indoor fusion channel communication system of a downlink transmitting device. Referring to FIG. 9, FIG. 9 is a structural diagram of an indoor fusion channel communication system according to Embodiment 9 of the present invention. The system includes a wireless data downlink transmitting device 1 and a user terminal 2.

Specifically, the wireless data downlink transmitting apparatus 1 is the same as the wireless data downlink sending apparatus described in the foregoing fifth, sixth, and seventh embodiments, and details are not described herein again.

The user terminal 2 is connected to the wireless data downlink transmitting apparatus 1 and receives data downlinked by the wireless data downlink transmitting apparatus 1.

It is apparent that the above-described embodiments are merely illustrative of the examples, and are not intended to limit the embodiments. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. Obvious changes or variations resulting therefrom are still within the scope of the invention.

Claims (14)

A wireless data downlink sending method, comprising: Determining whether a visible light communication channel is available; If the visible light communication channel is available, controlling to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel, If the visible light communication channel is not available, control is used to transmit data using the Wi-Fi communication channel. The method according to claim 1, wherein before the step of controlling to transmit data in parallel using the Wi-Fi communication channel and the visible light communication channel, the method further comprises: Determining whether the channel quality of the data transmission air interface of the visible light communication channel reaches a predetermined standard; If the predetermined criteria are not met, the parameters of the visible light communication module are adjusted such that the data transmission air interface channel quality of the visible light communication channel reaches the standard. The method according to claim 1, wherein the step of controlling parallel transmission of data using the Wi-Fi communication channel and the visible light communication channel comprises: Reading channel quality and communication status information of the Wi-Fi communication channel and the visible light communication channel; Predicting communication capabilities of the Wi-Fi communication channel and the visible light communication channel according to the information; Scheduling an appropriate amount of cached data queues to distribute to the Wi-Fi communication channel and the visible light communication channel according to the communication capability; Controlling the Wi-Fi communication channel and the visible light communication channel to transmit the data queue in parallel downward. The method of claim 1 wherein said Wi-Fi communication channel has at least two data transmission ports. A wireless access point device, comprising: a Wi-Fi communication module, a visible light communication module, and a multi-channel logical link control layer respectively connected to the Wi-Fi communication module and the visible light communication module; The multi-channel logical link control layer is used to: Determining whether the visible light communication channel of the visible light communication module is available, and if the visible light communication channel is available, controlling to use the Wi-Fi communication channel of the Wi-Fi communication module and the visible light communication channel to transmit data in parallel, if If the visible light communication channel is not available, then control is used to transmit data using the Wi-Fi communication channel. The device according to claim 5, further comprising a device management unit; The multi-channel logical link control layer is further configured to determine whether a channel quality of the data transmission air interface of the visible light communication channel reaches a predetermined standard. If the predetermined criterion is not met, the device management unit is controlled to adjust parameters of the visible light communication module such that the data transmission air interface channel quality of the visible light communication channel reaches the standard. The device according to claim 5, wherein the multi-channel logical link control layer is further configured to: Reading channel quality and communication status information of the Wi-Fi communication channel and the visible light communication channel; Predicting communication capabilities of the Wi-Fi communication channel and the visible light communication channel according to the information; Distributing a cache data queue to the Wi-Fi communication channel and the visible light communication channel according to the communication capability; Controlling the Wi-Fi communication channel and the visible light communication channel to transmit the data queue in parallel downward. The device according to claim 5, characterized in that the Wi-Fi communication channel has at least two data transmission air ports. An indoor fusion channel communication system, comprising: a user terminal and the wireless access point device according to any one of claims 5-8. A wireless data downlink transmitting apparatus, comprising: a first determining unit, configured to determine whether a visible light communication channel is available; a first control unit, configured to control to transmit data in parallel using a Wi-Fi communication channel and the visible light communication channel if the visible light communication channel is available, and to control using Wi-Fi if the visible light communication channel is unavailable The communication channel transmits data downstream. The device according to claim 10, further comprising a second determining unit, configured to determine whether a channel quality of the data transmission air interface of the visible light communication unit reaches a predetermined standard; And a second control unit, configured to adjust a parameter of the visible light communication module if the predetermined standard is not met, so that the data transmission air interface channel quality of the visible light communication channel reaches the standard. The device according to claim 10, further comprising: a reading unit, configured to read channel quality and communication state information of the Wi-Fi communication channel and the visible light communication channel; And a prediction unit, configured to predict, according to the information, a communication capability of the Wi-Fi communication channel and the visible light communication channel; a scheduling unit, configured to distribute, according to the communication capability, a buffer data queue to the Wi-Fi communication channel and the visible light communication channel; And a third control unit, configured to control the Wi-Fi communication channel and the visible light communication channel to send the data queue in parallel downlink. The apparatus according to claim 10, wherein said Wi-Fi communication channel has at least two data transmission air ports. An indoor fusion channel communication system, comprising: a user terminal and the wireless data downlink transmitting apparatus according to any one of claims 10-13.

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