WO2017008360A1

WO2017008360A1 - Wireless data uplink transmission method and device

Info

Publication number: WO2017008360A1
Application number: PCT/CN2015/086353
Authority: WO
Inventors: 王锐; 陈万里
Original assignee: 南方科技大学
Priority date: 2015-07-16
Filing date: 2015-08-07
Publication date: 2017-01-19
Also published as: CN106358219A; CN106358219B

Abstract

The present invention discloses a wireless data uplink transmission method and device. The method comprises: determining whether data waiting to be uplink transmitted contains a frame control instruction bit of a visible-light communication protocol; if not, then uplink transmitting the data via a Wi-Fi communication channel; and if so, then transmitting the data to a visible-light communication module to be processed as a specific MAC frame format, and then uplink transmitting the same via a Wi-Fi communication channel. Compared to the prior art, the technical solution in the present invention has the following advantages: for uplink data transmission, if the data contains a frame control instruction bit of a visible-light communication protocol, then the data is transmitted to a visible-light communication module to be processed as a specific MAC frame format and then uplink transmitted via a Wi-Fi communication channel. Therefore, Wi-Fi communication is effectively combined with visible light communication, thus reducing a data uplink cost.

Description

Wireless data uplink 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 uplink 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, one drawback of visible light communication is that the implementation of two-way transmission is difficult. In terms of downlink transmission, 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. LED lighting on the ceiling is usually more and the luminous intensity is large and easy for the user to detect. 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. At present, the uplink of the 802.15.7 protocol also uses visible light communication, and the user terminal also needs to install a high-power LED to ensure that the access point AP receives the data sent by the terminal, and the upward and downward beams are simultaneously illuminated, which causes a large light source. Pollution, increase Data uplink cost.

Therefore, how to properly combine wireless local area network communication with visible light communication in an indoor wireless communication system, and at the same time reduce data uplink cost, has become 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 properly combine wireless local area network communication with visible light communication and also reduce data uplink cost.

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

Determining whether the data waiting for the uplink transmission contains the frame control command bit of the visible light communication protocol,

If the data waiting for the uplink transmission does not contain the frame control command bit of the visible light communication protocol, the data is sent upstream through the Wi-Fi communication channel.

If the data waiting for the uplink transmission contains the frame control command bit of the visible light communication protocol, the data is sent to the visible light communication module for processing into a specific MAC frame format, and then transmitted through the Wi-Fi communication channel.

Further, the specific MAC frame format is: the frame control command bit of the visible light communication protocol is filled in a data segment of a data frame of a Wi-Fi communication protocol.

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

Further, the air interface includes at least one 2.4G air interface and one 5G air interface.

Correspondingly, the present invention also provides a wireless data uplink receiving method, including:

Preliminary analysis of data received by the Wi-Fi communication channel;

Determining whether the parsed data includes a frame control command bit of a visible light communication protocol;

If the parsed data does not include a frame control command bit of the visible light communication protocol, the parsed data is sent to the upper application;

If the parsed data includes a frame control command bit of the visible light communication protocol, the parsed data is sent to the visible light communication module for further analysis, and then sent to the upper layer application.

Further, the frame control command bit of the visible light communication protocol is filled in the data segment of the data frame of the Wi-Fi communication protocol.

The present invention also provides a wireless data uplink transmitting apparatus, including:

a first determining unit, configured to determine whether a data waiting for uplink transmission includes a frame control command bit of a visible light communication protocol;

The first control unit is configured to: if the data waiting for the uplink transmission does not include the frame control command bit of the visible light communication protocol, send the data to the uplink through the Wi-Fi communication channel, and if the data waiting for the uplink transmission includes the visible light communication protocol The frame control command bit is sent to the visible light communication module for processing into a specific MAC frame format, and then transmitted through the Wi-Fi communication channel.

Correspondingly, the present invention further provides a wireless data uplink receiving apparatus, including:

a parsing unit, configured to initially parse data received by the Wi-Fi communication channel;

a second determining unit, configured to determine whether the parsed data includes a frame control command bit of a visible light communication protocol;

a second control unit, configured to: if the parsed data does not include a frame control command bit of the visible light communication protocol, send the parsed data to the upper layer application; if the parsed data includes a frame control command bit of the visible light communication protocol, The parsed data is sent to the visible light communication module for further analysis, and then sent to the upper layer application.

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

(1) When the data is transmitted upstream, the control is transmitted using the Wi-Fi communication channel, and if the data contains the frame control command bit of the visible light communication protocol, the data is sent to the visible light communication module for processing into a specific MAC frame format, and then The uplink is transmitted through the Wi-Fi communication channel. The invention uplinkly transmits data processed by the visible light communication module through a Wi-Fi communication channel, and effectively combines Wi-Fi communication with visible light communication, thereby reducing data uplink cost.

(2) When the data is received in the uplink, if the parsed data contains the frame control command bit of the visible light communication protocol, the data is sent to the visible light communication module for further analysis, so that 802.15.7 can be correctly received through Wi-Fi communication. Protocol data. The invention sends the data of the frame control command bit containing the visible light communication protocol received by the Wi-Fi communication to the visible light communication module for analysis, and effectively combines the Wi-Fi communication with the visible light communication, thereby reducing the data uplink cost.

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 uplink data of a wireless data according to Embodiment 1 of the present invention;

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

3 is a block diagram of a wireless data uplink transmitting apparatus according to Embodiment 3 of the present invention;

4 is a frame format of a non-data packet of an uplink visible light communication protocol according to the present invention;

FIG. 5 is a schematic diagram of a wireless data uplink receiving apparatus according to Embodiment 4 of the present invention; FIG.

6 is an indoor fusion channel including the wireless data uplink transmitting apparatus and the wireless data uplink receiving apparatus of the present invention; Communication system framework diagram.

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 uplink data of a wireless data according to Embodiment 1 of the present invention, where the method includes:

Step S110, determining whether the data waiting for the uplink transmission contains the frame control command bit of the visible light communication protocol.

Specifically, when the user accesses the authentication or other data that needs to be downlinked through the visible light communication protocol, since the visible light communication uplink is unavailable, only the returned data can be uplinked through the Wi-Fi communication channel. Therefore, the fusion of the Wi-Fi communication 802.11X protocol and the visible light communication 802.15.7 protocol is a very critical step. The visible light communication 802.15.7 protocol defines five frame formats: beacon, data, acknowledgment, command, and CVD. The data frame data can be directly filled in the data segment of the 802.11X protocol MAC frame, and other frame formats need special processing when the uplink control is transmitted through Wi-Fi communication because the frame control command bit is included. Therefore, it is necessary to first judge whether the frame control command bit of the visible light communication protocol is included in the data waiting for the uplink transmission.

Step S120: If the data waiting for the uplink transmission does not include the frame control command bit of the visible light communication protocol, the data is uplinked through the Wi-Fi 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, and the communication capacity of the 5G air interface is C2. The communication capacity at this time is C≈C1+C2. According to the channel quality and communication status of each air interface, one of the air interfaces or two air ports is selected for data uplink transmission.

Step S130: If the data waiting for the uplink transmission contains the frame control command bit of the visible light communication protocol, the data is sent to the visible light communication module for processing into a specific MAC frame format, and then transmitted through the Wi-Fi communication channel.

Specifically, the specific MAC frame format is: the frame control command bit of the visible light communication protocol is filled in a data segment of a data frame of a Wi-Fi communication protocol. Referring to FIG. 4, the second box portion belongs to the data segment of the data frame of the Wi-Fi communication protocol, and the "802.15.7 MAC frame header" filled therein is the frame control command bit of the visible light communication protocol.

This embodiment has the following advantages:

When the data is transmitted in the uplink, the control is transmitted using the Wi-Fi communication channel, and if the data contains the frame control command bit of the visible light communication protocol, the data is sent to the visible light communication module to be processed into a specific MAC frame format, and then passed through the Wi- The Fi communication channel is transmitted upstream. The invention uplinkly transmits data processed by the visible light communication module through a Wi-Fi communication channel, and effectively combines Wi-Fi communication with visible light communication, thereby reducing data uplink cost.

Correspondingly, the present invention also provides a wireless data uplink receiving method.

FIG. 2 is a flowchart of a method for receiving uplink data of a wireless data according to Embodiment 2 of the present invention, where the method includes:

Step S210, initially parsing the data received by the Wi-Fi communication channel.

Specifically, the data received by the Wi-Fi communication channel is initially parsed by the Wi-Fi communication module.

Step S220, determining whether the parsed data includes a frame control command bit of the visible light communication protocol.

Specifically, the frame control command bit of the visible light communication protocol is filled in a data segment of a data frame of a Wi-Fi communication protocol. Referring to FIG. 4, the second box portion belongs to the data segment of the data frame of the Wi-Fi communication protocol, and the "802.15.7 MAC frame header" filled therein is the frame control command bit of the visible light communication protocol. This step determines whether the parsed data frame contains the frame control command bit of the 802.15.7 protocol.

Step S230: If the parsed data does not include the frame control command bit of the visible light communication protocol, the parsed data is sent to the upper layer application.

Specifically, if the parsed data frame header does not include the frame control command bit of the 802.15.7 protocol, it indicates that the 802.11X protocol data has been parsed in step S210.

Step S240: If the parsed data includes a frame control command bit of the visible light communication protocol, the parsed data is sent to the visible light communication module for further analysis, and then sent to the upper layer application.

Specifically, if the frame control command bit of the 802.15.7 protocol is included in the parsed data frame header, it is 802.15.7 protocol data, which cannot be completely parsed in step S210, and needs to be sent to the visible light communication module for further analysis.

This embodiment has the following advantages:

When the data is received in the uplink, if the parsed data contains the frame control command bit of the visible light communication protocol, the data is sent to the visible light communication module for further analysis, so that the 802.15.7 protocol data can be correctly received through the Wi-Fi communication. The invention sends the data of the frame control command bit containing the visible light communication protocol received by the Wi-Fi communication to the visible light communication module for analysis, and effectively combines the Wi-Fi communication with the visible light communication, thereby reducing the data uplink cost.

Correspondingly, the present invention also provides a wireless data uplink transmitting apparatus.

FIG. 3 is a schematic diagram of a wireless data uplink sending apparatus according to Embodiment 3 of the present invention. The device includes: a first determining unit 110 and a first control unit 120.

The first determining unit 110 is configured to determine whether the data waiting for the uplink transmission contains the frame control command bit of the visible light communication protocol.

Specifically, when the user accesses the authentication or other data that needs to be downlinked through the visible light communication protocol, since the visible light communication uplink is unavailable, only the returned data can be uplinked through the Wi-Fi communication channel. Therefore, the fusion of the Wi-Fi communication 802.11X protocol and the visible light communication 802.15.7 protocol is a very critical step. The visible light communication 802.15.7 protocol defines five frame formats: beacon, data, acknowledgment, command, and CVD. The data frame data can be directly filled in the data segment in the 802.11X protocol MAC frame, and the other frame formats include the frame control command bit. When Wi-Fi communication is transmitted upstream, special processing is required. Therefore, it is necessary to first judge whether the frame control command bit of the visible light communication protocol is included in the data waiting for the uplink transmission.

The first control unit 120 is configured to: if the data waiting for the uplink transmission does not include the frame control command bit of the visible light communication protocol, send the data to the uplink through the Wi-Fi communication channel, and if the data waiting for the uplink transmission contains visible light The frame control command bit of the communication protocol sends the data to the visible light communication module for processing into a specific MAC frame format, and then transmits the uplink through the Wi-Fi 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, and the communication capacity of the 5G air interface is C2. The communication capacity at this time is C≈C1+C2. According to the channel quality and communication status of each air interface, one of the air interfaces or two air ports is selected for data uplink transmission. The specific MAC frame format is: the frame control command bit of the visible light communication protocol is filled in a data segment of a data frame of a Wi-Fi communication protocol. Referring to FIG. 4, the second box portion belongs to the data segment of the data frame of the Wi-Fi communication protocol, and the "802.15.7 MAC frame header" filled therein is the frame control command bit of the visible light communication protocol.

This embodiment has the following advantages:

Correspondingly, the present invention also provides a wireless data uplink receiving apparatus.

FIG. 5 is a schematic diagram of a wireless data uplink receiving apparatus according to Embodiment 4 of the present invention. The device includes a parsing unit 210, a second judging unit 220, and a second control unit 230.

The parsing unit 210 is configured to initially parse data received by the Wi-Fi communication channel.

The second determining unit 220 is configured to determine whether the parsed data includes a frame control command bit of a visible light communication protocol.

The second control unit 230 is configured to: if the parsed data does not include a frame control command bit of the visible light communication protocol, send the parsed data to the upper layer application; if the parsed data includes a frame control command of the visible light communication protocol Bit, Then, the parsed data is sent to the visible light communication module for further analysis, and then sent to the upper layer application.

Specifically, if the parsed data frame header does not include the frame control command bit of the 802.15.7 protocol, it indicates that the 802.11X protocol data has been parsed in the parsing unit 210; if the parsed data frame header is The frame control command bit of the 802.15.7 protocol is described as 802.15.7 protocol data, which cannot be completely parsed in the parsing unit 210, and needs to be sent to the visible light communication module for further analysis.

This embodiment has the following advantages:

Accordingly, the present invention also provides an indoor fusion channel communication system including the wireless data uplink transmitting apparatus of the above embodiment and the wireless data uplink receiving apparatus of the above embodiment. Please refer to FIG. 6. FIG. 6 is a block diagram of an indoor fused channel communication system including the wireless data uplink transmitting apparatus and the wireless data uplink receiving apparatus of the present invention. The system includes a wireless data uplink transmitting device 1 and a wireless data uplink receiving device 2. Specifically, the wireless data uplink transmitting apparatus 1 is as described in the third embodiment of the present invention, and is not described here. The wireless data uplink receiving apparatus 2 is as described in Embodiment 4 of the present invention, and details are not described herein again.

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

A wireless data uplink sending method, comprising:

Determining whether the data waiting for the uplink transmission contains the frame control command bit of the visible light communication protocol,

If the data waiting for the uplink transmission does not contain the frame control command bit of the visible light communication protocol, the data is sent upstream through the Wi-Fi communication channel.

If the data waiting for the uplink transmission contains the frame control command bit of the visible light communication protocol, the data is sent to the visible light communication module for processing into a specific MAC frame format, and then transmitted through the Wi-Fi communication channel.
The method according to claim 1, wherein the specific MAC frame format is: a frame control command bit of the visible light communication protocol is filled in a data segment of a data frame of a Wi-Fi communication protocol.
The method of claim 1 wherein said Wi-Fi communication channel has at least two data transmission ports.
The method according to claim 3, wherein said air interface comprises at least one 2.4G air interface and one 5G air interface.
A wireless data uplink receiving method includes:

Preliminary analysis of data received by the Wi-Fi communication channel;

Determining whether the parsed data includes a frame control command bit of a visible light communication protocol;

If the parsed data does not include a frame control command bit of the visible light communication protocol, the parsed data is sent to the upper application;

If the parsed data includes a frame control command bit of the visible light communication protocol, the parsed data is sent to the visible light communication module for further analysis, and then sent to the upper layer application.
The method of claim 5 wherein the frame control command bits of the visible light communication protocol are populated within a data segment of a data frame of a Wi-Fi communication protocol.
A wireless data uplink transmitting apparatus, comprising:

a first determining unit, configured to determine whether a data waiting for uplink transmission includes a frame control command bit of a visible light communication protocol;

The first control unit is configured to: if the data waiting for the uplink transmission does not include the frame control command bit of the visible light communication protocol, send the data to the uplink through the Wi-Fi communication channel, if the data waiting for the uplink transmission includes the visible light communication protocol The frame control command bit sends the data to the visible light communication module for processing into a specific MAC frame format, and then transmits the uplink through the Wi-Fi communication channel.
The apparatus according to claim 7, wherein the specific MAC frame format is: a frame control command bit of the visible light communication protocol is filled in a data segment of a data frame of a Wi-Fi communication protocol.
A wireless data uplink receiving apparatus includes:

a parsing unit, configured to initially parse data received by the Wi-Fi communication channel;

a second determining unit, configured to determine whether the parsed data includes a frame control command bit of a visible light communication protocol;

a second control unit, configured to: if the parsed data does not include a frame control command bit of the visible light communication protocol, send the parsed data to the upper layer application; if the parsed data includes a frame control command bit of the visible light communication protocol, The parsed data is sent to the visible light communication module for further analysis, and then sent to the upper layer application.
The apparatus of claim 9, wherein the frame control command bits of the visible light communication protocol are populated within a data segment of a data frame of a Wi-Fi communication protocol.